The effluent treatment plant

 

(57) Abstract:

Use: treatment of wastewater from heavy metals, petroleum products, oils, paints, detergents. The inventive installation for wastewater contains electrojector, block for coagulation sludge, slurry pump for providing pressurized driving otechnyh water during the purification from mechanical and colloidal pollutants, safety sorption filter and block for sludge dewatering in the form of cartridge filters, arranged vertically one above the other and provided with means for feeding in them compressed gas under pressure higher than the pressure of the pump. 1 C.p. f-crystals, 1 Il.

The invention relates to the field of wastewater treatment from heavy metals, petroleum products, oils, paints, detergents and can be used at the enterprises of machine-building complex.

A device for local treatment of industrial wastewater from heavy metal type LOC [1] the Device is designed for electrochemical treatment of wastewater containing heavy metals. A disadvantage of the known device is the absence in the composition of the blocks on the purification of the treated liquid to the requirements of SB who instrukciya modular water treatment complex "Elyon", containing electrojector, flotation machine-clarifier, flocculator-filter, kidrobot, saturator, the vacuum device and the dryer foam [2] the Disadvantages of the known designs are the release of contaminants in the form of foam through the use of electro-flotation method, require as a result of the saturator, devices for collecting and drying the foam, the use of thermal energy for drying, the complexity of the regeneration and restoration of permeability flocculator-filter, no sludge dewatering systems of the flocculator filter. Gravity mode of motion treated in electroreactive fluid further cleaning system limits the system performance under fixed geometries.

The aim of the invention is to improve the operational characteristics of the device for treatment of wastewater from heavy metals, petroleum products, oils, paints, detergents, and sewage systems.

The objective is achieved in that the device for waste water purification from heavy metals, petroleum products, oils, paints, detergents mode electrocautery, is composed of a filter variable permeability to clean th treatment fluid, as dehydration and condensation of the resulting slurry is compressed gas under pressure higher than the pressure developed by the pump treated wastewater filtration and dehydration. To improve the performance of devices when fixed geometrical dimensions used pressure mode filtering waste in the reactor liquid through the filters of mechanical and sorption, and the inner diameter of the safety filter sorption purification is determined by the formula:

< / BR>
where Dtothe inner diameter of the safety of the sorption filter, m;

Dhthe diameter of the particles of sorbent in the sorption filter, m;

Q the performance of the device for wastewater treatment, m3;

the kinematic coefficient of viscosity of the filtered liquid, m2;

rt,Waccordingly, the density of the material particles of the sorbent and the filtered liquid, kg/m3;

g the acceleration of gravity, m/s2.

Comparative analysis of the prototype shows that the proposed device is different from the prototype application of pressurized driving fluid for cleaning from mechanical and colloidal pollutants and house, moreover, the inner diameter of the filter is determined by the formula (1), and dehydration allocated in the form of sludge pollutants produced in the unit, equipped with cartridge filters arranged vertically one above the other, by feeding compressed gas under pressure higher than the pressure pump for feeding liquid into the cleaning system and dehydration.

Thus, the proposed device complies with the criteria of the invention of "novelty."

The comparison of the proposed solutions not only prototype, but also with other technical solutions in this field of technology is not allowed to reveal in them the features distinguishing the claimed solution to the prototype that allows to conclude that the criterion of "inventive step".

The invention is illustrated in the drawing, which shows a schematic diagram of a device.

The system includes a wastewater storage 1 with pump drains 2 and the locking device 3 to regulate the flow of wastewater in electrojector 4, provided with a set of electrodes 5. The DC voltage on the electrodes is supplied from a rectifier 6, provided with a vent line water cooling 7 with a locking device 8 in the circulating system of vodosnabzhenie 11 and 12. Unit 10 through the shut-off devices 13 and 14 is connected with the pump 15 security mode setup. Pump through the piping with shutoff device 16 is connected with the filter 17 cleaning fluid from the mechanical suspensions, accommodated in the housing 18. The filter is equipped with pressure gauges pressure control fluid inlet 19 and outlet 20 and is connected through a pipe with a shut-off device 21 with the line water discharge 7 and through the locking device 22 with the suction pump 15. Through the pipe with a shut-off device 23, the filter 17 is communicated with the lower vertical cavity sorption safety filter 24, is filled with a layer of sorbent 25 and with pressure gauges at the inlet 26 and outlet 27. The lower conical portion of the filter 24 through the pipe with a shut-off device 28 communicates with the suction pump 15, and the upper part of the filter 24 through the pipe with a shut-off device 29 with the circulating water system 9 through the pipe with a shut-off device 30 with the line water discharge 7. The pressure line of the pump 15 through the pipe with a shut-off device 31 communicates with the block 32 sludge dewatering, inside of which are vertically bottom 33 and top 34 filters, cleaning liquids from mechanical suspensions, analogically the filter surface and provided with a pressure gauge 36, to the upper part of the body through the shutoff device 37 and the supplied compressed gas. Exits the bottom of the filter through the pipe with a pressure gauge 38 and the locking device 39 and the top of the filter through the pipe with pressure gauge 40 and the locking device 41 are connected to a common line. Line water discharge 7 has an outlet with shut-off device 42 for connecting the flexible hose 43 when washing and sludge removal 44 through the pipe with a shut-off device 45 from electroreactive 4 and block coagulation sludge 10. The discharge of wash water from the dehydration unit is in the water recycling system through the pipe with a shut-off device 46 or wastewater storage through the pipe with a shut-off device 47.

The device operates as follows. Wastewater with closed shut-off devices 14, 21, 22, 28, 30, 31, 37, 42, 45 from the tank 1 by the pump 2 is served in the lower part of electroreactive 4, plate 5 which is applied direct current voltage 12V 24V rectifier 6. With the passage of the upward flow of wastewater between the plates due to the electrochemical oxidation reactions, recovery, neutralization, coagulation, deposition of toxic substances dissolved with the formation of OK coagulation 10, where the deposition of a septic contamination in the form of slurry 44 cone on the bottom of the unit. From the block 10 at the open shut-off devices 13, 16, 23, 29 pump 15 purified from contaminants water is supplied sequentially to the filter 17 cleaning fluids from mechanical and colloidal impurities. The specified element of the device is made in the form of cartridge filters from chemically resistant materials such as sprayed polypropylene, and the outer cartridge retains particles of a maximum size, for example at least 100 μm and an inner cartridge mechanical delays and colloidal particles with a size not less than 3 μm. After the filter 17, the liquid is filtered through a bed of sorbent, presents granulated materials such as zeolite or activated carbon. The filtering mode purified from mechanical and colloidal particles of fluid through the sorbent safety filter provides a safety treatment fluid from slippage of heavy metals in dissolved form. To ensure the minimum dimensions of the filter and ensure maximum contact with the surface of the sorbent particles from the filtered flow rate of filtered fluid through the sorbent should not be less than the velocity of the Oia O. M. Todes

< / BR>
where Re is the Reynolds number for the speed of the beginning of fluidization of granular material;

Ar criterion of Archimedes.

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The inner diameter of the filter housing 25 will be determined from the condition

< / BR>
Passed through the filter 25 water is directed into the circulating water system.

Feed slurry 44 in the sludge dewatering unit 32 of the elements of the device is as follows. When closed shut-off devices 8, 13, 16, 21, 22, 28, 30, 37, 41, 47 and inoperative pump 2 when you open the shut-off device 42 water from line 7 is fed to the hose 43. When the pump 15 at the open shut-off devices 14, 31, 39, 45, 46 sludge in the form of a slurry is fed into the dehydration unit, where water is separated from the sludge on the filter and is directed into the circulating water system 9. The degree of contamination of the filter 33 is determined by the difference of pressures on the gauges 36 and 38. When complete clogging of the filter 33 when the pressure on the pressure gauge 38 will be zero, the locking device 39 is closed, the locking device 41 is opened, and water is separated from the sludge on the filter 34. When complete clogging 34 when the fluid pressure on the manometer readings will be zero, shut-off devices 14, 31, 42, 45 overlap, and when open, C is the displacing fluid from the unit and sealing slurry. Increasing the degree of compaction is achieved by alternately closing the shut-off devices 39 and 41. After complete removal of liquid from the dehydration unit 32 with open hatches 35 discharge of dewatered sludge and mechanical cleaning of the outer surface of cartridge filters, which if necessary can be replaced with new ones and the old ones recovered by washing in acid solution.

Restoration of permeability of filter 17 is produced by removal of the sludge with its outer surface in the dehydration unit 32 by excessive pressure inside the filter 17 water supply pipeline 7 in closed devices 8, 13, 14, 16, 22, and included the pump 15. Depending on the degree of contamination of the filter 17, which is controlled by a pressure differential liquid pressure gauges 19 and 20, it can be replaced with new, and old recovered by washing in acid solution.

Regeneration of the sorbent 25 safety in the filter 24 is performed by flushing water from the pipe 7 when closed 8, 13, 14, 16, 21, 22, 23, 29, 46 and open 28, 30, 31, 39, 41, 47 shut-off devices.

The use of electrocautery, pressure filtering modes treated in electroreactive drains, filter cleaning from mechanical and number the of compressed gas can improve the operational characteristics of the device and the degree of wastewater treatment.

The sources of information.

1. Local complexes of wastewater treatment. The Avenue. Research Institute "Arrow", , Tula, 1995.

2. Equipment and technology for wastewater treatment engineering companies. Album. VNIIEM. Moscow, 1991 (prototype).

1. Installation for sewage treatment from heavy metals, petroleum products, oils, paints, detergents, containing electrojector, block to coagulate the precipitate and block for sludge dewatering, characterized in that it is equipped with a pump to provide pressure mode of movement of wastewater through the treatment from mechanical and colloidal pollutants and safety sorption filter with granular filling, inner diameter is determined from the expression

< / BR>
where Dtothe inner diameter of the safety of the sorption filter, m;

Dhthe diameter of the particles of sorbent, m;

Q performance installation, m3;

- kinematic coefficient of viscosity of the filtered liquid, m2;

t,Wrespectively the density of the material particles of the sorbent and filtered water, kg/m3;

g the acceleration of gravity, m/s2,

when this unit for dewatering sludge carried in the form of patron the od pressure, excess pressure pump.

2. Installation under item 1, characterized in that the elements of the unit are mounted on a moving base.

 

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SUBSTANCE: the invention presents a dust catching apparatus intended for gas sweetening from a dust in different fields of industry, in particular, in power engineering, ferrous and nonferrous metallurgy, cement industry, etc. The dust-catching apparatus includes an electro filter and in series with it installed a fabric filter with a ratio of their active volumes as 0.1-0.9. The apparatus ensures: a maximum efficiency of gas cleaning irrespective of concentration of a dust in the cleaned gas, its dispersity and specific electrical resistance; a big service life between repairs.

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3 cl, 2 dwg

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