Gravity-magnetic separator

FIELD: process engineering.

SUBSTANCE: invention relates to gravity-magnetic separator for flocculation of plankton and bacteria contained in ballast water and to separation of flakes collected by magnetic force. This separator comprises first tank with mixer connected with outboard water feed pipe to mix said water with added flocculating agent and magnetic powder. The latter is fed from appropriate device to make magnetic micro flakes including magnetic powder. Second tank comprises mixer for slower mixing of water whereto polymer flocculating agent is added. This allows the increase in sizes of magnetic micro flakes for processed water discharged from first tank with mixer. Magnetic separator serves to collect increased magnetic flakes by magnetic force. Said processed water is discharged from second tank with mixer and includes increased magnetic flakes. Return and addition device returns collected flakes from magnetic separator by scrapers into outboard water feed pipe to position ahead the first tank with mixer and ahead of position where flocculating agent is added to add collected flakes to outboard water.

EFFECT: higher efficiency of flocculation with no use of chemicals.

5 cl, 7 dwg, 2 tbl

 

Background of the invention

The technical field to which the invention relates

The present invention relates to flocculation magnetic separator for flocculation of plankton and bacteria in ballast water, and to the separation of flakes collected thus, using the magnetic force.

Description of the previous level of technology

In accordance with the International Convention for Control and Management of Ship's Ballast Water, adopted by the International Maritime organisation (IMO) in 2004, the vessel must be equipped with a system of removal or sterilization of plankton and bacteria in ballast water. This Convention was adopted to prevent the movement of bacteria through ballast water or sea water, destruction of the ecosystem by spreading germs and health hazards caused by micro-organisms.

Currently the processing technology of ballast water are being actively developed by combining a variety of water treatment technologies, including chimeric processing with the use of sodium hypochlorite or similar, ozonation, ultraviolet irradiation, heat treatment and magnetic separation or the like.

Here, flocculation magnetic separator described in patent document 1, work through the following stages: adding magnetic powders�and flocculant and in ballast water (or sea water); mixing the resulting mixture with the formation of the magnetic flakes containing microorganisms and bacteria mixed in the ballast water; magnetic separation of the flakes from the ballast water by means of a device for magnetic separation and collection of relatively large solid materials, not capable of flocculation themselves (for example, small fish, each the size of a few millimeters, and algae) use the filter drum type.

When flocculation magnetic separator used flocculant is a very safe agent that is also used for the treatment of tap water. In addition, the treatment water with use of flocculant is less risky than processing using chemikalie, such as chlorine. In other words, flocculation treatment is less prone to secondary pollution of the environment by chemicals remaining in the ballast water at the time of release, and related by-products.

In addition, flocculation magnetic separator flatwire not only microorganisms and bacteria, but also sand and silt in ballast water, thereby simultaneously separating and removing all materials. This allows flocculation magnetic separator to have a secondary effect of preventing the accumulation of dog�and silt in the lower part of the ballast tank.

However, there are following problems in flocculation magnetic separator described in patent document 1. One of the problems is that the used amount of expensive magnetic powder must be reduced, while maintaining the cleaning performance of ballast water. Another problem is that the total number of collected cereals should be reduced.

Namely in relation to flocculation magnetic separator, magnetic powder, added in this way must be contained uniformly in all cereals as much as possible, are formed when the magnetic flakes. Should use a magnetic powder consisting of particles each of which has an extremely small particle size of several microns, and the same size of particles.

However, it should be noted that such a magnetic powder is very expensive, resulting in increased costs of working flocculation magnetic separator. For this reason, it is necessary to reduce the amount of magnetic powder as much as possible. In addition, assuming that the flocculation magnetic separator is installed on the vessel, reducing the amounts of the magnetic powder makes it possible to reduce the size of the storage tank� for magnetic powder.

This provides a great advantage when installing flocculation magnetic separator inside the ship, with limited space to accommodate a variety of devices. At the same time, this advantage allows to reduce the frequency of feeding of the magnetic powder inside of the vessel, which reduces the burden on seafarers.

Meanwhile, collect the flakes discharged from the magnetic separator must be stored in the tank and processed as industrial waste. Thus, there is an urgent need to collect the flakes had to recikliranje as much as possible, to reduce their total number, in order to reduce the size of the tank for storage, to save space and reduce the cost of processing industrial waste.

From the point of view of what discussed above, it should be noted that patent document 2 describes a cleaning device magnetic separation, having the following feature. That is, the cleaning tool is magnetic separation works through the implementation stages: adding hydrochloric acid to collect the flakes while stirring the mixture; the decomposition of the polymer flocculant, which in this case should be divided into decomposed flocculant that contains oil and obrabotanno� water and the component of the magnetic powder; and the return of decomposed flocculant and magnetic powder in outboard water for recycling these materials.

The prior art documents

Patent documents

Patent document 1: JP H09-117618

Patent document 2: JP 2006-718

Disclosure of the invention

Problem solved with the help of the invention

In patent document 2 hydrochloric acid is used for recycling of the magnetic powder. It should be noted here that the use of hydrochloric acid in the vessel requires the submission of documents to check IMO; the documents that demonstrate the safety of the installation processing system that uses hydrochloric acid is a strong acid. In addition, you must submit additional documents to verify IMO; the documents that demonstrate the reliability of the method of neutralization of the treated materials.

Accordingly, such an extremely complicated procedure is required for use of such a processing system in which use hydrochloric acid.

Due to circumstances as described above, requires the development of flocculation magnetic separator, which can reduce the number of collected flakes, and used amount of the magnetic powder; magnetic flocculation separator should�ü able to physically remove microorganisms and bacteria contained in ballast water, as described in patent document 1.

Here, the problem associated with the way to reduce the used quantity of the magnetic powder and the amounts collected flakes without using chemikalie, such as hydrochloric acid, for the treatment of seawater, is not limited to the case of ballast water treatment. The same problem arises in the case of sea water, which is treated on shore.

The present invention was developed in view of the problems described above. For this reason, the aim of the present invention is to provide a flocculation magnetic separator that can reduce the used amount of the magnetic powder without using chemikalie, such as hydrochloric acid as well as amounts collected flakes, to process seawater.

Problem solvers

Accordingly, the present invention made to achieve the above mentioned purpose. We have proposed flocculation magnetic separator, comprising: a first tank with an agitator to form a magnetic microglobe containing magnetic powder; and a second tank with an agitator to increase the size of the magnetic microglobe by mixing water, which must be processed, to which is added a polymeric flocculant.

Here the first tank with agitator is connected to the pipe for supplying water and magnetic microlepia are formed by rapidly stirring the water, to which is added a magnetic powder and a flocculant. Such a magnetic powder is fed from the device for feeding a magnetic powder. In addition, the outside water which must be processed in the second tank with agitator, contains magnetic microlepia discharged from the first tank with agitator. The second tank is mixed at a lower speed of rotation than the first tank.

In addition, flocculation magnetic separator includes: a magnetic separation device to collect the flakes increased size by using magnetic force and the return device and adding to the return of flakes collected thus by using the magnetic separation device, a pipe for supplying water, located in the position before the first tank with agitator and front of the position where the outboard water add flocculant. The device will then return and add adds collect the flakes in fresh water.

Here, flocculation magnetic separator of the present invention includes a device for the return and add to the return of cereals, unloaded from the magnetic separation device, a pipe for supplying outboard in�s in position before the first tank with agitator and front position where add flocculant. Collect the flakes discharged from the device for magnetic separation, once stored in a receiving tank to collect the flakes. Then collect the flakes back into the pipe for supplying water through the device and return add.

Accordingly, the magnetic powder contained in collectible cereal, is recycled according to the present invention. This recycling method makes it possible to reduce the used quantity of the magnetic powder without using chemikalie, such as hydrochloric acid, or the like, and, in addition, should decrease the number of collected flakes. In addition, this method of recycling allows you to make unnecessary complicated separation and processing of the magnetic powder for the Department. It should be noted that the collection of flakes who don't return, are able to flow from the receiving tank to collect the flakes as collect excess flakes so that they are stored separately in a storage reservoir to collect the flakes.

Flocculation magnetic separator of the present invention preferably comprises a device for detecting the concentration, for detecting the concentration of suspended solids in sea water before provisions where add m�gnity powder, flocculant and collect the flakes.

In addition, flocculation magnetic separator preferably contains a control device for controlling return quantities of cereals collected through the device for a refund and add, together with the amounts of the magnetic powder is added through the feeder magnetic powder.

Here, the control device carries out the operation described above on the basis of both the concentration of suspended solids, apparently detected by the device detection concentration, and maximum concentration of suspended solids in sea water, asked in advance.

The control device of the present invention controls the amount collected flakes returned through the return device and add, and the amount of magnetic powder that is added through the feeder magnetic powder.

Here, the control node performs the operation based on both the concentration of suspended solids, apparently detected by the device for detecting the concentration and the maximum concentration of suspended solids in sea water, specified in advance (or calculated values for flocculation magnetic separator).

In accordance with the present invention, the detect�varies the concentration of suspended solids in sea water, and then it is confirmed that the detected concentration is lower than the maximum concentration of suspended solids in sea water. This procedure eliminates complicated processing for separation and recovery, and for this reason the collected flakes are recycled using a simple and inexpensive structure of the system. In addition, the recycling method of the magnetic powder contained in collectible cereal, making it possible to reduce the used quantity of completely new magnetic powder. It also becomes possible additional reduction of generated amounts collected flakes obtained from a completely new magnetic powder.

In addition, in accordance with the present invention, if the concentration of suspended solids, detected by the detecting device of concentration, defined as the maximum concentration of suspended solids in sea water, the control device preferably stops the process of returning the collected flakes by the return device and add. Simultaneously, the control device preferably controls the amount of magnetic powder that is added through the feeder magnetic powder, increasing the number of collec�IIR flakes, returned through the return device and adding, when the concentration of suspended solids becomes lower than the maximum concentration of suspended solids in sea water. In addition, the control device preferably controls the amount of magnetic powder that is added through the feeder magnetic powder, so we add its quantity must decrease.

Accordingly, the above-mentioned procedure according to the present invention makes possible a more stable performance of the treatment for flocculation magnetic separator, regardless of the concentration of suspended solids in sea water.

At the same time, in accordance with the present invention, if the concentration of suspended solids in sea water becomes higher than the maximum concentration of suspended solids in sea water, collect the flakes can't go back to the pipe for supplying water. However, to return to collect the flakes in order to recycle the magnetic powder contained in collectible cereal even in the above case, the method returns must extract collected from cereal only component of the magnetic powder and delete other suspended solids �omponent.

From the point of view of what is described above, in the present invention, the device for extracting the magnetic powder is provided with a return line disposed between the device and return added and the tube flow sea water. The extraction device of the magnetic powder contains: grinding device grinding the collected flakes under the action of shear forces; the extraction device, for selective extraction of only the magnetic powder of the collected flakes, ground thus using magnetic force, and a return device for returning the extracted magnetic powder in the pipe for supplying seawater.

The device for extracting the magnetic powder of the present invention performs the steps of: extracting a component of the magnetic powder of the collected flakes and remove other suspended solids through stages in two stages, as discussed below.

Stages first stage collect the flakes are crushed by the application thereto of physical effort. It should be noted that the collected flakes are formed by a strong flocculation of the magnetic powder and other suspended solid component with an inorganic flocculant and a polymer flocculant. For this reason, the stage of grinding the product durable flock�lation is carried out using ultrasonic grinder, linear grinder or ball mill for grinding durable product flocculation.

We have collected the flakes are ground using only physical effort without using chemikalie, such as hydrochloric acid. This gives the opportunity to reduce the risk arising at this stage associated with leakage chemikalie, providing at this stage, the characteristic of high security. As a result, when a node extracting magnetic powder installed on Board, this feature simplifies the procedure of approval of the installation from the side IMO, it is easier.

Then, at the stages of the second stage, the crushed flakes consisting of a magnetic powder, is extracted from the source of the collected flakes using the extraction device using magnetic force. Thus, other suspended solid components are removed from the extracted flakes. Then collect recoverable flakes back in the pipe for supplying water through the device for a refund.

It should be noted that suspended solid components other than the magnetic powder are removed from the collected flakes, which should be returned. In this case, collect the flakes consisting of a magnetic powder, which should be returned, are very clean. Accordingly, the FDS�selected cereals, may return to the pipe for supplying water, even if the concentration of suspended solids in sea water is high.

In the present invention it is preferred to placing the device for sterilization sterilization of plankton and bacteria contained in collectible cereal in the aisle to return the collected flakes. Here, the return process is carried out using the device for a refund and additions.

When flocculation magnetic separator of the present invention is used in the treatment system ballast water, installed on the boat, plankton and bacteria contained in collectible cereal, sterilized by means of the device for sterilization. Then collect the flakes, sterilized thus, in return pipe for supplying water. This procedure can reduce the a different load, load on outboard water collected flakes.

The effect of the invention

Flocculation magnetic separator according to the present invention makes it possible to reduce the used quantity of the magnetic powder without using chemikalie, such as hydrochloric acid, and, in addition, it reduces the number of collected flakes.

Brief description of the drawings

Fig.1 is a diagram showing the overall construction of the flocculation magnetic separator, in one embodiment, be implemented thr�deposits.

Fig.2 is a block diagram showing the main part of the flocculation magnetic separator, containing the node extracting magnetic powder. It should be noted that Fig.1 shows a separator provided with a node extracting magnetic powder.

Fig.3 is a block diagram of flocculation of the magnetic separator of Fig.1.

Fig.4 is a graph showing recovery rates collected flakes in flocculation magnetic separator in Fig.2.

Fig.5 is a graph showing recovery rates collected flakes in flocculation magnetic separator in Fig.3.

Fig.6 is a graph showing the relationship between the concentration of the added magnetic powder and the proportion of removal of flakes.

Fig.7 is a graph showing the relationship between the concentration of SS (suspended solids) in the outboard water and the share return of flakes.

Embodiments of the present invention

Further preferred embodiments of flocculation magnetic separator of the present invention will be explained in detail with reference to the accompanying drawings.

Fig.1 is a diagram showing the overall construction of the flocculation of the magnetic separator 10, in one embodiment, execution. Floculation�th magnetic separator 10 includes: a pipe 12 for supplying water; node 14 flocculation; node 16 magnetic separation (or the magnetic separation device), the node 18 of the return and add (or return device and addenda), the node 20 of the extraction magnetic powder (or extraction device of magnetic powder); node thermal sterilization 22 (or the device for sterilization) and the node 24 of the control (or control device).

It should be noted that flocculation magnetic separator 10 in this variant implementation is used in the treatment system ballast water, installed on the boat. In this case, the separator 10 is provided with a node 22 heat sterilization. However, when such flocculation magnetic separator is located on the shore, the node 22 thermal sterilization is an important component of the separator 10.

In addition, if the flakes are collected via node 16 magnetic separation, directly back into the pipe 12 for supplying water through the node 18 of the return and add the node 20 of the extraction magnetic powder is also an important component of the separator 10.

The node 14 of the flocculation tank contains 26 high-speed stirring (or the first tank with agitator) and the reservoir 28 with low speed mixing (or second tank with agitator). Node 14 flocculation produces a magnetic microflora of water that must be processed (and�and sea water), which is fed through a pipe 12 for supplying water. For this operation, the pipe 12 for supplying water is provided by the node 30 of the filing of the magnetic powder (or a device for supplying magnetic powder) and node 32 adding flocculant. In addition, the node 36 of adding a polymer flocculant is located on the conduit 34, through which the water that must be treated, flows from the reservoir 26 with high-speed stirring reservoir 28 with low shear mixing.

The node 30 of the filing of the magnetic powder has a pump 38 for injecting the magnetic powder. The speed of rotation of the pump 38 for injecting the magnetic powder is controlled by the node 24 of control. This mechanism controls the added quantity entirely new magnetic powder to be added to the pipe 12 for supplying water.

In addition, the meter 40 concentration of SS (suspended solid products: below are referred to as SS) (or turbiner), which detects the concentration of suspended solids, is attached in front of the pipe 12 for supplying water. Data on the concentrations of SS, detected using the 40 meter SS concentration, are served at node 24 of control. Then, on the basis of data on the concentration of SS, the node 24 controls the speed of rotation of the pump 38 for injecting m�gitogo powder, as well as the speed of rotation of the pump 42 to return the collected flakes, which is a component of the node 18 of the return and add.

On the basis of the above mechanism brand new magnetic powder and collect the flakes to add outboard water that flows through a pipe 12 for supplying water. It should be noted that the attaching position of the meter 40 SS concentration is not limited to the pipe 12 for supplying water. In this respect, any provision of the accession may be preferable provided that the attaching position is in the area before the area in which is added a magnetic powder, a flocculant and collect the flakes. For example, a 40 meter SS concentration can join the temporary storage tank sea water.

Here, as the magnetic powder, may preferably be used a powder of ferrite iron (II). As a flocculant, preferably can be used water-soluble inorganic flocculant, such as polyaluminium chloride, chloride, iron (III) sulfate and iron (III). In addition, as the polymer flocculant may preferably be used an anionic flocculant and nonionic flocculant.

The reservoir 26 with high-speed stirring blade has a stirrer (not shown in Fig.1), which is fast� rotates for to stir the mixture seawater, magnetic powder, flocculant and collect the flakes that are added to sea water. Outboard water in which add magnetic powder, flocculant and collected flakes, quickly mixed using a paddle stirrer. This operation enables the formation of extremely small magnetic microglobe that have a size of several tens μm in the tank 26 with high speed stirring. When formed magnetic microflora, microorganisms and bacteria in sea water are adsorbed on the magnetic powder, which works as the core of adsorption, since germs and bacteria are electrically charged, they are going in magnetic microglobal.

The reservoir 28 with low speed stirring is constructed as a multi-stage tank with agitator, consisting of a number of the plurality of tanks. Tank with mixer in each stage is equipped with a paddle stirrer (not shown in Fig.1). Relative to the reservoir 28 with a stirrer, designed in multistage form, speed mixing tank is set so that the agitation speed is reduced from the previous tank with a stirrer until the next tank with agitator. Thus water, which must be processed in�natural with magnetic microcopies and polymer flocculant, which add to the water that must be processed, they will be fed into the reservoir 28 with low speed mixing tank 26 with high speed stirring. As a result, the agitation speed is reduced during the transition from the previous tank with agitator to the next tank.

This mechanism facilitates the growth of the magnetic microfloppies, they become flakes increased size. In addition, since the mixing speed in each tank is lowered stepwise, there is only a small chance that the flakes increased size will collapse the corresponding paddle mixer.

Node 16 collects magnetic separation cereals increased size of water that must be processed, it contains: tank 44 magnetic separation, magnetic filter 46, a scraper (not shown in Fig.1) and a conveyor system 48. Water that must be processed containing cereals increased size, is fed from the tank 28 with low speed stirring reservoir 44 magnetic separation. Magnetic filter 46 has, for example, in the form of a rotating drum, and at least a portion of the filter 46 is immersed in water, which have to be processed in the vessel 44 magnetic separation. The filter 46 magnetic separation collects flakes of increased size, which� drift in the reservoir 44 magnetic separation, filled with water which must be processed.

Then the flakes increased size collected in this way (or collect flakes), rise up from the reservoir 44 magnetic separation, in connection with the rotational movement of the magnetic filter 46. Raised cereals increased size suscribanse with magnetic filter 46 with a scraper. After that collect the flakes, scrape off thus transferred to the receiving tank 50 to collect the flakes with the aid of the conveyor system 48, such as a screw conveyor. Collect the flakes that are portable thus temporarily stored in the tank 50.

Collect the flakes stored in a receiving tank 50 to collect the flakes are sent to the node 22 thermal sterilization by pump 42 to return the collected flakes. Node 22 thermal sterilization sterilizes micro-organisms and bacteria contained inside collect cereal, by means of heat treatment of the collected flakes.

It should be noted that the collected flakes are in the form of a suspension. For this reason, it is preferable to use a pump with positive displacement, such as a tube pump, or pump type monoaxial screw, as the pump 42 to return the collected flakes. The heating temperature for the sterilization of bacteria or the like is set in pre�trusted from 75 to 80°C, and heating time is set in about three minutes.

At the same time, the node 20 of the extraction magnetic powder contains: grinding nodes 52 and 54 (or device for grinding) grinding the collected flakes under the action of shear forces, the node 56 of recovery (or extraction device) for selective extraction of the component of the magnetic powder collected from the crushed flakes under the action of the magnetic force and the pump 58 (or return device to return the extracted component of the magnetic powder in the pipe 12 for supplying water.

As discussed above, flocculation magnetic separator 10 shown in Fig.1, represents one of the variants of implementation, in which the node 22 thermal sterilization is in the position before the passage and to return the collected flakes, which is sent to the node 18 of the return and add. In addition, in one of the embodiments, the node 20 of the extraction of the magnetic powder is in the position after passage to return.

Node 52 grinding is a linear chopper, which generates a strong shear force created by the rapid rotation of a blade stirrer 60, having a special form. In contrast, another node 54 grinding is an ultrasonic crusher (frequency = about 20 kHz),which generates a shear force through the fluid 64 through immersion vibrator 62 in the form of a rod, vibrating with the frequency of the ultrasonic waves in the liquid 64.

It should be noted that in this embodiment there are two nodes 52 and 54 of grinding, although can be installed one of these sites. Alternatively, as a host of crushing (or grinding device) can be used ball mill 65.

Then collect the flakes, crushed with the help of nodes 52 and 54 of grinding, are served at node 56 extract. Node 56 extracting extracts the component of the magnetic powder collected from the crushed cereal with the help of magnetic force. In this node 56 of extraction, which is used with a magnetic disk or magnetic drum, disk and drum immersed permanent magnets.

This design makes it possible to extract the component of the magnetic powder collected from cereals, SS and substances other than the component of the magnetic powder must be released.

Here manufactured substances SS other than the component of the magnetic powder is about 0.2% of the flocculation performance of the magnetic separator 10. Accordingly, the node 56 of extraction in the present embodiment may be smaller than the node 16 magnetic separation, which is the main component.

Collect the flakes, which ends the processing for extracting, the massage is designated�I to extract the component of the magnetic powder, stored in the storage tank to collect cereal (not shown in Fig.1) as the separated and collected flakes. This method is similar to the method implemented to collect excess flakes that are generated in the receiving tank 50 to collect the flakes. It should be noted that the component of the magnetic powder is extracted using magnetic force, has a low water content, resulting in low yield. Moreover, the component of the magnetic powder is fed into the tank 68 storage of pure water 66, wherein it is diluted. Then, the magnetic powder, thus diluted with pure water 66, is returned to the pipe 12 for supplying water through a pump 58. This method makes it possible to add magnetic powder of high purity in the water that must be processed and which flows through a pipe 12 for supplying water.

Here, in the pipe 12 for supplying water, the position of the return collect flakes and position of adding the magnetic powder are in position after the 40 meter SS concentration and in position in front of the tank 26 with high-speed stirring, and in the field in front of the position where to add the flocculant. It should be noted that the speed of rotation of the pump 58 is controlled by the node 24 of the control based on the concentration of SS, izmerennoe using the 40 meter SS concentration.

Hereinafter will be described in detail the impact of flocculation of the magnetic separator 10 constructed as discussed above.

Fig.2 is a block diagram showing the main part of the flocculation of the magnetic separator 10. This is the main part of the flocculation of the magnetic separator 10 is a separator, constructed by removing the node 20 of the extraction magnetic powder flocculation of the magnetic separator 10 shown in Fig.1.

That is, flocculation magnetic separator 10 in Fig.2 represents a variant of execution in which the passage for returning the collected flakes is the only node 22 heat sterilization. Here, the return process is carried out using the node 18 of the return and add.

In flocculation magnetic separator 10 in Fig.2 is the node 18 of the return and add that returns and adds the collected flakes are derived from the node 16 of magnetic separation in the region in front of the position where to add the flocculant in the pipe 12 for supplying water. Collect the flakes derived from the node 16 magnetic separation, temporarily stored in a receiving tank 50 to collect flakes (see Fig.1). Then the collected flakes back into the pipe 12 for supplying water through a pump 42 to return collect hlophe�, included in the node 18 of the return and add.

In contrast, unreturned collect the flakes are stored separately in a tank to store the collected flakes (not shown in Fig.2) through a blend of flakes from the receiving tank 50 to collect the flakes as the surplus of cereal.

As discussed above, the procedure to return the collected flakes into the pipe 12 for supplying water makes possible the recycling of the collected flakes without using chemikalie, such as hydrochloric acid. In the result, the component of the magnetic powder contained in collectible cereal, making it possible to reduce the used quantity of completely new magnetic powder. In addition, this also reduces the total number of collected flakes generated in this way, the addition of a brand new magnetic powder.

At the same time, the node 24 controls the amount collected flakes that are returned by the node 18 of the return and add, and the number of completely new magnetic powder added using the node 30 of the filing of the magnetic powder. Here, the operation control is carried out based on the concentration of SS, apparently detected through meter 40 SS concentration and maximum concentration of SS in sea water, where the maximum concentration of SS in the fence�cent water, you need to install in advance.

That is, when the concentration of SS, detected using the 40 meter SS concentration equal to the maximum SS concentration in sea water, the node 24 of the control stops the operation of returning the collected flakes through the node 18 of the return and add. Simultaneously, the node 24 controls the quantity of completely new magnetic powder that is added by the node 30 of the filing of the magnetic powder.

At this time, when the concentration of SS becomes lower than the maximum concentration of SS in sea water, the node 24 of the control increases the number of collected flakes that are returned by the node 18 of the return and add. Simultaneously, the node 24 control reduces the number of completely new magnetic powder that is added by the node 30 of the filing of the magnetic powder.

The above-mentioned procedure makes possible the stabilization of the characteristics of the treatment flocculation of the magnetic separator 10 in Fig.2, which is not dependent on the concentration of SS in the outboard water. It should be noted that the node with the reference position 70 is a filter. The filter 70 separates the treated water and the washing water from the water that must be processed, which is split by a node 16 magnetic separation. Then the washing water is recycled to the pipe 12 for supplying water through a conduit 72

Further more specifically, will be described in detail a method of control by using the node 24 of the control.

First, it should be noted that the return of the amount collected flakes are controlled by the speed of rotation of the pump 40 to return the collected flakes, which is controlled by the node 24 of control. Here the share of the collected flakes in the returned quantity is set in the range from 0 to 100% of the total output amounts collected flakes.

Secondly, it is necessary to note that a refundable amount collected flakes are controlled by the node 24 based controls SS concentration in sea water, apparently detected through meter 40 SS concentration, with a maximum concentration of SS in outboard water specified in advance.

For example, it is assumed that the flocculation magnetic separator 10 is performed so as to have the maximum SS in fresh water, equal to 50 mg/L. In this case, it is believed that sea water having a SS concentration of 50 mg/l, occurs in the pipe 12 for supplying water. If 100% of the collected flakes returned to fresh water, this means that SS in amounts corresponding to the SS concentration of 50 mg/l, returning to fresh water. Accordingly, the concentration of SS in outboard water flowing into the tank 26 are high speed� stirring, represented by the following formula: 50+50=100 mg/L. the concentration of SS in sea water having a value of 100 mg/l higher than the maximum SS concentration in sea water, corresponds to a negligible flocculation performance of the magnetic separator 10.

On the other hand, when the outside water having the concentration of SS 10 mg/l, flows into the pipe 12 for supplying water, flocculation magnetic separator 10 has a sufficient processing capability for processing seawater in the amount of processing capabilities seawater with a concentration of SS 40 mg/l, compared to seawater, with a maximum SS concentration of 50 mg/L.

As a result there is no problem returning the number of collected flakes corresponding to the remaining capacity of the treatment for flocculation of the magnetic separator 10.

During test calculation, when flocculation magnetic separator 10 in Fig.2 is used for treatment of sea water, the ratio between the SS concentration in sea water (A) (mg/l) returned by the collected flakes (B) (return rate (%) number of collected flakes in relation to the number of flakes) and add a number of completely new magnetic powder (C) (mg/l) is shown in the graph of Fig.4 and table 1, below.

Here the graph of Fig.4 and table�and 1 show the return the collected flakes, when the calculated maximum SS concentration in sea water is 50 mg/L.

On the chart of Fig.4, the vertical axis represents the proportion of the magnetic powder contained in the flakes at a time before returning to the node 16 of magnetic separation. The horizontal axis represents the proportion of returned collect flakes relative to the displayed number.

In addition, the lower limit value of the proportion of the magnetic powder in flakes establish when to 31.4%. Here the proportion of returned flakes and add the number of completely new magnetic powder is set so that the proportion of the magnetic powder becomes equal to 31.4% or more, for the effective implementation of magnetic separation using the node 16 magnetic separation.

It should be noted that in the present embodiment, the proportion of the return of the cereal and add the number of completely new magnetic powder was set at 31.4 percent. More specifically, as shown in table 1, when the SS concentration in sea water is 50 mg/l, flocculation magnetic separator 10 does not return to collect the flakes, while the separator 10 only adds a whole new magnetic powder at a concentration of 30 mg/l SS Concentration in sea water are detected by the meter 40 SS concentration and flocculation magnetic separator 10 controls the proportion �of returning the collected flakes and add a number of completely new magnetic powder, appropriate detect data thus measured, as shown in table 1.

In addition, when flocculation magnetic separator 10 is used for treatment of ballast water, the maximum SS concentration in sea water is set so that it had a value of 50 mg/l, following the instructions IMO. However, because the actual concentration of SS in seawater often has a value less than 10 mg/l, the process of returning the collected flakes into the pipe 12 for supplying seawater that is configured, as discussed above, reduces the amount used, brand new magnetic powder.

It also gives the possibility of reducing the necessary quantities of stored brand new magnetic powder that gives priority to the quality of the vessel, whose internal space to accommodate multiple devices is significantly limited. It should be noted that plankton and bacteria (viable organisms) is chosen as a target for removal in the handling of ballast water. For this reason, when forming the flakes back into the pipe 12 for supplying water in the return line feature node 22 thermal sterilization to return the collected flakes after sterilization of plankton and bacteria.

Table 1
ABC
500 (do not return)30
401626
303121
204716
106212

On the other hand, the injected quantity of completely new magnetic powder using control node 24 of the control by setting a speed of rotation of the pump 38 for injecting the magnetic powder. Here, the operation control is performed in the range from 0 to 100%, while the share of 100% (i.e., 30 mg/l), calculated relative to the injected quantity of completely new magnetic powder is in the case where the collected flakes are not returned to the pipe 12 for supplying water. The injected quantity of completely new magnetic powder is determined by the return of the amounts collected flakes. For example, when the return amount collected flakes to output the number of comp�provides 47%, magnetic powder, which flows into the tank 26 with high-speed stirring, must return to 47% of it. In this case, the injected quantity of completely new magnetic powder may be set at about 53% (or 16 mg/l).

Return the number of collected flakes are detected by the flow meter 74, which is in the pipeline to return the collected flakes. Based on the results of measurement of the flow meter 74 node 24 of the control adjusts the speed of rotation of the pump 38, thereby establishing the injected quantity of completely new magnetic powder.

Here flocculation magnetic separator 10 in Fig.2 may not return the collected flakes, if the SS concentration in sea water is greater than the maximum estimated concentration of SS in the outboard water. For this reason, even in this case, to return with collect cereal for the purpose of recycling component of the magnetic powder in collectible cereal, the process of refund you must extract only the component of the magnetic powder of the collected flakes and remove other components of the SS.

Further flocculation magnetic separator 10 in Fig.3 shows the positions of the nodes. Here, the node 20 of the extraction of the magnetic powder is in the position after node 16 magnetic separation, and the node 22 of termicheskaya is in the position after the node 20 of the extraction of the magnetic powder.

That is, flocculation magnetic separator 10 in Fig.3 represents a variant of execution in which the node 20 of the extraction of the magnetic powder is in the position before the passage and to return the magnetic flakes; method of return is via node 18 of the return and add, while the node 22 thermal sterilization is in the position after passage to return.

The node 20 of the extraction magnetic powder separately carries out processing of collected flakes that are released from the host 16 magnetic separation, within the next two stages of steps: the extraction component of the magnetic powder contained in collectible cereal, and removing the other components from SS collect the flakes.

The first step comprises the steps of: grinding the collected flakes through physical effort to collect the flakes. In collectible cereal component of the magnetic powder and other components of SS are firmly agglomerated by means of an inorganic flocculant and a polymer flocculant. Accordingly, linear chopper 52 and/or ultrasonic chopper 54 is used for grinding such firmly agglomerated flakes.

It should be noted that experimentally determined that the collected flakes, firmly agglomerated thus decompose�I'm almost to grinding, through the processing of grinding within a few tens of seconds to several minutes, carried out with the help of linear chopper 52 and/or ultrasound chopper 54.

Here you can implement the method to adjust the pH value using chemikalie, as described in patent document 2, in order to facilitate the decomposition of the collected flakes. However, when processing is carried out on the vessel, it is preferable to decompose the collected flakes only through physical method, taking into account instructions IMO or such.

The second step comprises the steps of: extracting only the component of the magnetic powder of the collected flakes, ground thus through the magnetic force. As node 56 of extraction (see Fig.1) Assembly can be used with the use of a magnetic disk or magnetic drum, which is submerged in permanent magnets. Then the second step further comprises the steps of: diluting the extracted component of the magnetic powder with clean water 66 (see Fig.1) and the return component of the magnetic powder in the pipe 12 for supplying seawater (see Fig.1) using a pump 58 (see Fig.1).

Within two steps of these stages, the purity of the component of the magnetic powder, which should return increases. This increase purity makes it possible to return�tion collected flakes, containing in the main component of the magnetic powder, even if the concentration of SS in outboard water increases.

Here carry out a trial calculation, considering that SS components other than the component of the magnetic powder is separated from 30% of the collected flakes. Accordingly, in the case of flocculation of the magnetic separator 10 in Fig. 3, the relationship between SS concentration in sea water (A) (mg/l), return the amounts collected flakes (B) (it is represented shares return % collect flakes respect to output quantities collected flakes) and add a completely new quantities of magnetic powder (C) (mg/l), represented by the graph in Fig.5 and table 2.

The above results show that flocculation magnetic separator 10 in Fig.3) may further increase the return rate of the collected flakes corresponding to the concentration of SS in the outboard water and reduce the added quantity entirely new magnetic powder in comparison with the flocculation magnetic separator 10 with no node 20 extraction of magnetic powder in Fig.2.

Table 2
ABC
50 0 (do not return)30
401925
304218
206511
10874

In addition, if 30% of SS components other than the component of the magnetic powder contained in collected flakes are separated and removed from the collected flakes using the node 20 of the magnetic powder extract, this leads to a condition in which the collected flakes initially contain the SS concentration in sea water of 30 mg/l and, thus, the concentration of SS makes possible a return of 42% released collect the flakes.

Accordingly, it is preferable to have the node 20 of the extraction of the magnetic powder in the magnetic flocculation separator 10, if the concentration of SS in outboard water often exceeds the maximum estimated concentration of SS in outboard water or if returns additional amount collected flakes, in order to reduce the amount you use of completely new magnetic powder, which should also decrease.

[Additional comments]

[�Of Yasnaya on the optimal value of the proportion of the magnetic powder in the magnetic flakes]

Here it should be noted that the target for treatment, intended for treatment of ballast water include plankton and bacteria. In addition, if the treatment system of ballast water on the vessel, you must pass the trials to test the performance of the system for processing or instructions, as determined by regulatory authority. In accordance with the instructions, the processing system must have operating characteristics sufficient for the treatment of ballast water containing suspended solids (SS), such as sand, ballast water at a maximum concentration of 50 mg/l, while meeting the release criteria for ballast water.

In this respect, the authors of the present invention adopt the method of adding microparticles on the basis of a mineral called kaolin as a model of sand or similar in the study to determine the conditions for flocculation magnetic separation of plankton and bacteria.

Below test method will be more specifically explained in detail.

First in sea water containing plankton and bacteria, is added the above-mentioned kaolin at a concentration of 50 mg/l. Then carry out studies of flocculation in seawater through the setting of parameters (or variables) with the inclusion of fractions adding the magnetic powder, reorgani�die flocculant and polymer flocculant. After that, assess the condition of the magnetic flakes by using visual observation. Then sea water containing magnetic flakes, is introduced into a channel in which orderly arranged permanent magnets. Sea water is subjected to the contact treatment and adsorption treatment using magnets within the specified time (or few seconds). Then measure the concentration of magnetic flakes in the sea water withdrawn from the channel, determine the proportion of removed magnetic flakes.

The results of the evaluation study, as discussed above, clearly show that the plankton and bacteria localroot sufficiently under the conditions of shares add: polyaluminium chloride is used as an inorganic flocculant = 5 mg Al/l and a polymer flocculant = 1 mg/L.

In addition, as shown in Fig.6, the percentage of removal of the magnetic flakes is probably increased when increasing the share of added magnetic powder. When the proportion of addition of the magnetic powder becomes equal to 30 mg/l, the percentage removal is probably reaches its peak. From the point of view of costs, it is desirable to reduce the proportion of added magnetic powder as much as possible. Therefore, the proportion of the added magnetic powder is defined as 30 mg/L.

If the proportion of adding a magnetic powder, an inorganic flocculant and a polymer resin�tion flocculant set at such values, as discussed above, the content of the magnetic powder to the magnetic flakes can be calculated using the following formula.

The content of the magnetic powder in the magnetic flakes (%) = (the proportion of the added magnetic powder)/(share of added kaolin + share add magnetic powder + share adding an inorganic flocculant + share adding a polymer flocculant) × 100 ---

(Formula 1)

Here, each value is as listed below. Share add magnetic powder = 30 mg/l; the proportion of addition of kaolin = 50 mg/l; the proportion of adding an inorganic flocculant = 5×(78/27) = 14,4 mg/l; the proportion of adding a polymer flocculant = 1 mg/L.

It should be noted that polyaluminium chloride, is added as an inorganic flocculant, exists in the form of aluminum hydroxide (Al(OH)3) in the magnetic flakes. For this reason, the share add polyaluminum chloride is calculated by the formula: 5 mg Al/l (percentage added) × 78 (MW Al(OH)3)/27 (AW Al).

If the appropriate values to substitute in the formula 1, the formula would be represented as:

The content of the magnetic powder in the magnetic flakes(%) = 30/(50 + 30 + 14,4 + 1) × 100 = 31,4(%)

The authors of the present invention determines that the calculated proportion of the magnetic powder is an optimal value that allows for the percentage removal of IAHS�on the Internet at: cereals and to minimize processing costs.

As discussed above, it should be noted that the recycling method of the magnetic powder requires the organization of the flow of the magnetic powder for processing in order to ensure that the proportion of the magnetic removal of flakes and maintain the performance of their processing without decreasing the content of the magnetic powder to a value smaller than the value computed above.

In addition, the graph in Fig.7 shows the percentage return collect flakes against the outboard SS in water (mg/l). Share return of the collected flakes establish on the basis of this graph.

Description of the reference positions

10: Flocculation magnetic separator

12: Pipe for supplying sea water

14: Node flocculation

16: Node magnetic separation (or the magnetic separation device)

18: return Node and add (or return device and addenda)

20: the Node extracting magnetic powder (or device of magnetic powder extract)

22: Node thermal sterilization (or device for sterilization)

24: control unit (or control unit)

26: the Reservoir with high-speed stirring (or the first tank with agitator)

28: a Reservoir with low speed mixing (or second tank with agitator)

30: the Node for supplying magnetic powder (or a device for supplying magnetic powder)

32: Node doba�ing flocculant

34: Pipeline

36: Node adding a polymer flocculant

38: a Pump for injecting the magnetic powder

40: measuring the concentration of SS (or a device for detecting concentration)

42: Pump to return the collected flakes

44: Tank magnetic separation

46: Magnetic filter

48: Pipeline

50: collector vessel to collect flakes

52: the desintegration (or a device for grinding: linear shredder)

54: the desintegration (or device for the grinding of: ultrasonic shredder)

56: Node retrieval (or extraction device)

58: the Pump (or device return)

60: Paddle stirrer

62: Vibrator

64: Liquid

65: Ball mill (site shredding)

66: Clean water

68: Tank

70: Filter

72: Pipeline

74: flow Meter

1. Flocculation magnetic separator, containing:
the first tank with an agitator, connected to a pipe for supplying water, which takes the outboard water and rapidly mixing sea water with the added flocculant and magnetic powder, which is fed from a feeder magnetic powder, to form thereby the magnetic microglobe containing magnetic powder;
second tank with agitator for slower mixing of the treated water, to�which adds a polymeric flocculant, than in the first vessel with a stirrer, to thereby increase the size of the magnetic microfloppies, for the treated water containing the magnetic microflora and withdrawn from the first tank with agitator;
the magnetic separation device for collecting enhanced magnetic flakes, under the action of magnetic force, from the treated water, which is drawn from the second tank with agitator and containing an increased magnetic flakes; and
device return and additions, designed to return the collected flakes that have been collected from the magnetic separation device that scrapes through with a scraper, a pipe for supplying seawater to the position before the first tank with agitator and front of the position where to add the flocculant, thereby adding the collected flakes in fresh water.

2. Flocculation magnetic separator according to claim 1, further comprising:
the device detection concentration designed for detection of the concentration of suspended solids in sea water, in position before adding the magnetic powder flocculant and collected flakes; and
a control device that is designed to control the number of returned collected flakes, input return device and add, and the amount of added magnetic powder, a supply�ICDO device for feeding a magnetic powder, based on both the concentration of suspended solids, apparently detected by a device for detecting the concentration and the maximum concentration of suspended solids in sea water, asked in advance.

3. Flocculation magnetic separator according to claim 2, wherein the control unit stops the process of returning the collected flakes, input return device and adding, when the concentration of suspended products, detected by a device for detecting the concentration becomes equal to the maximum concentration of suspended solids in sea water, and at the same time, the control device controls the amount of added magnetic powder is supplied with a device for supplying magnetic powder; and
the control device increases the number of return the collected flakes, input return device and adding, when the concentration of suspended solids becomes lower than the maximum concentration of suspended solids in sea water, and at the same time, the control device reduces the amount of added magnetic powder is supplied with a device for supplying magnetic powder.

4. Flocculation magnetic separator according to claim 1, further comprising: a the extraction device of magnetic powder, which is located on the return line, located between the device and return and add a pipe for supplying water;
the extraction device of magnetic powder that contains:
grinding device for grinding the collected flakes under the action of shear forces;
the extraction device designed for selective extraction of only the component of the magnetic powder from the collected flakes, ground thus using magnetic force; and
the return device designed to return the component of the magnetic powder, thus extracted, a pipe for supplying seawater.

5. Flocculation magnetic separator according to claim 1, further comprising a device sterilization designed for sterilization of plankton and bacteria contained in the collected flakes, located in the pipeline to return the collected flakes, input return device and add.



 

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