Method to control source of vacuum in vacuum sewage system. RU patent 2509844.
 Element of drainage system with basalt reinforcement / 2470122Invention is related to elements of drainage systems. A drainage system element has a concrete body open on top, which surrounds a drainage channel. The drainage system element represents a gutter element with an extended body, which is U-shaped in the section across the axis of the gutter. The body comprises basalt fibres joined in bundles and arranged in the body along and/or across the gutter axis. Bundles are joined into a net. The net is arranged in the form of a U letter in the U-shaped body around the gutter channel in a vertical part. The body comprises spacers from basalt, stretching from a net to a gutter channel and/or at least to one external side of the body. |
 Device to separate running water, method to separate running water and waste water system / 2464385Device to separate running water arriving from a drain pipe and divert this water into a pipe for contaminated water and a pipe for rain water, comprises the first channel of running water, having an overflow partition, limiting water flow arriving from the drain pipe and sending it into the pipe for contaminated pipe. The device also comprises the second channel sending water flowing over the overflow partition, into the pipe for rain water, a separating wall to block water going through the first channel, to form chambers of water diversion separated in the first channel and a throttling part formed in the separating wall. The method for separation of running water consists in using the device for its separation. At the same time, when running water flow arriving from the drain pipe is higher than the specified flow rate, it is sent into the pipe for contaminated water along the first channel. Water flow is throttled by means of the throttling part, and running water accumulated in chambers of water drain and flowing over the overflow partition, is sent into the pipe for rain water along the second channel. The waste water system comprises the first and second devices to separate running water arriving from the drain pipe. The second device is connected to the first one by means of the first pipe so that a part of water separated by the first device is sent to the second device along the first pipe to separate this part of water. The system also comprises a device to treat running water connected to the second device by means of the second pipe so that a part of this water separated by the second device is sent to the device for treatment along the second pipe, the device for water accumulation connected to the second device by means of the third pipe and connected to the device for water treatment by means of the fourth pipe so that a part of water separated by the second device is sent to the device for water accumulation along the third pipe for temporary water accumulation and its drainage into the device for treatment along the fourth pipe. Besides, the first device comprises the following components: the first channel with the overflow partition limiting water flow arriving from the drain pipe and sending water, which does not flow over the partition, into the first pipe; the second channel sending running water into the water area, arriving from the drain pipe and flowing over the partition; the separating wall for blocking of running water sending via the first channel, to form chambers of water drainage separated in the first channel, and the throttling part formed in the separating wall to throttle water flow passing from one drain chamber into the other one. The second device comprises the following components: the first channel including the overflow partition limiting water flow arriving from the first pipe and sending running water arriving from the first pipe and not flowing over the overflow partition, into the second pipe; the second channel sending water arriving from the first pipe and flowing over the partition, into the third pipe; the separating wall for blocking of water going through the first channel, to form chambers of water drain separated in the first channel, and the throttling part formed in the separating wall to throttle water flow passing from one drain chamber to the other chamber. |
| Sanitaryware complex / 2456413 Complex comprises a bath with a sink and a small oven on a foundation with a boiler built into it to heat water and a receiving hopper for used water, to which a sewage pipe is laid as inclined in the ground from the bath and the sink. The receiving hopper is located near the foundation for the small oven. At the same in the foundation in earth at the side of the receiving hopper there is a canopy deepened additionally by 0.5-1 m. |
 Energy-efficient device to recycle rain and melted drains from roofs of buildings in urbanised territories / 2454512Device comprises rain gutters (2), water intake funnels (3), drain pipes (4), a storm water outfall (7), filtering wells (16) and a subsurface accumulating reservoir (18). Drain pipes (4) are equipped with discharge parts with mini-hydroturbines (6). Power generated by mini-hydroturbines is sent to accumulator batteries. The storm water outfall is arranged below the level of the earth surface and is an extension of discharge parts of drain pipes. The filtering material is an ash and slag sorbent. |
 Vacuum sewage system / 2452820System comprises a toilet, a vacuum sewage pipeline connected to a toilet, a discharge valve, the first pump accessory, the second pump accessory. In the vacuum sewage pipeline there is a linear separation device. The vacuum sewage pipeline is connected to the toilet. The discharge valve is installed between the toilet and the vacuum sewage pipeline. The discharge valve is made as capable of opening in process of toilet usage. The first pump accessory and the second pump accessory are connected in parallel with the linear separation device. The linear separation device has a vacuum level between the specified high level and the specified low level. The first pump accessory is arranged as capable of removing air, and the second pump accessory is arranged as capable of pumping, mainly, sewage from a waste water flow leaking into the linear separation device. The vacuum sewage system comprises a pressure gauge. The pressure gauge is connected to the vacuum sewage pipeline. The method includes application of a vacuum sewage system. |
 Self-flowing vacuum system of sewage / 2413058System of sewage comprises receiving 1 and collecting reservoir 2, siphons 3, units of gas discharge with vacuum pumps 5 in vacuum columns arranged in upper parts of siphons. System includes at least two siphons connected to one receiving reservoir and one collecting reservoir, each siphon is equipped with a separate vacuum pump. |
 Device for waste disposal / 2410310Device for waste disposal includes sewage system, garbage pressing network, pumping up, and magistral stations, made with the possibility of filing and disposal of debris under excessive pressure. The garbage pressing network station comprises a garbage crusher, fluid supply device and a pressure machine. The garbage pressing network station is connected to sewage pipeline with garbage pressing booster station, which in turn is connected by magistral sewage pipeline with garbage pressing magistral station connected by magistral pipeline with a garbage disposal site. |
 System and method for adaptation of material pneumatic transportation mode / 2391467Invention is related to the sphere of sanitaryware equipment. System of adaptation of material pneumatic transportation mode comprises at least one first reservoir, which is connected to source of the first pressure, at least one second reservoir, which is connected to source of the second pressure. Also system includes connection line for transportation of material from the first reservoir into the second reservoir, pressure reduction gear, with the help of which difference may be controlled between pressure in the first reservoir and pressure in the second reservoir, and compressor between source of the second pressure and the second reservoir for development of negative pressure in the second reservoir. Method for adaptation of material pneumatic transportation mode comprises the following stages: connection of at least one first reservoir to source of the first pressure, connection of at least one second reservoir to the source of the second pressure, transportation of material from the first reservoir to the second reservoir. Also pressure reduction gear is controlled to change the difference between the pressure in the first reservoir and pressure in the second reservoir and reduction of pressure in the second reservoir with the help of compressor in case when difference between the first pressure and the second pressure is not sufficient for material transportation. |
 Method of oil-field development with recovery of refinery water drain and system for implementation thereof / 2390624Group of inventions refers to oil-refining and oil-producing industry, namely to drain recovery and flooding systems and keeping of formation pressure in oil-field development. The method involves oil production from various beds, keeping of formation pressure by injection of refinery mineralised water as a working substance in the beds. According to the invention, there is specified a group of injection wells striking the beds with the delivery chinks which have opened layers, containing local water of various physical and chemical properties and various reservoir features. Before injection of the working substance, physical and chemical properties of the working substance and local water are checked. Potential sediment formation is estimated and, as the case may be, the working substance flow is directed to the bed with minimum permissible sediment formation. In flow variation, the working substance is drained in the bed - an interlayer with high reservoir features. The device - system comprises the producing wells having struck the various beds, water conduits, pumps, a water source for injection in the bed for keeping of formation pressure, the injection wells having struck the beds containing local water with various physical and chemical properties and various reservoir features combined in a group with a general water conduit collector connected to a water drainage line for refinery discharge. According to the invention, the water conduit collector is provided with an analysis block of physical and chemical characteristics of the working substance, and the water conduits have flow switches. Said analysis block of physical and chemical characteristics of the working substance and switches are functionally interconnected through a computing and managing unit - controller for comparing physical and chemical characteristics of the working substance and local waters. |
 Underground reservoir for water / 2382150Method for storage of water, in which at least one flexible reservoir is retained for storage of sea water mass inside in submerged condition. Surface inlet device is created, which is connected with the possibility of liquid passage with flexible storage reservoir, and surface outlet device is created, which is connected with the possibility of liquid passage to flexible storage reservoir, for release of stored water. At the same time outlet device differs from inlet device. Valve is used in each inlet device and outlet device so that in process of reservoir or each storage reservoir filling, inlet valve is opened, and outlet valve is closed. At the same time in process of reservoir or each storage reservoir emptying, inlet valve is closed, and outlet valve is opened, and in process of water filling, head pressure from surface reservoir is used for forced injection of water into reservoir or each storage reservoir. |
 Autonomous sewage system / 2244073Sewage system includes bath, lavatory pan, washing stand, collecting vessel and decomposition vessel with orifices for purified water discharge in ground. Gas relief valve and pipeline are arranged in upper part of decomposition vessel. Above vessels are made as metal drums. Located inside decomposition vessel is filter system. Orifices are drilled in lower part of decomposition vessel and arranged along the full vessel bottom perimeter. Fertilizers from decomposition vessel are removed through above valve. System has connection means formed as flexible couplers to link domestic sewage junctions with above system structures. |
 Method and device for treated sewage water utilization / 2244786Method involves prospecting underground horizon with required absorbing capacity extending into pond; arranging gravity water flow into horizon; bringing water flow velocity up to underground horizon seepage velocity and providing dispersed laminar water flow. Device comprises water supply pipeline and receiving filtering well with waterproof side walls filled with coarse filling material and having narrow neck. Arranged inside neck are water flow deflectors installed below water supply pipeline in several rows and filter widening in downward direction. Accumulation chamber is located at upper filter part. Coarse filling material is located under accumulation chamber. Particle size of coarse filling material smoothly reduces in top-down direction and filter bottom is located below upper boundary of underground absorbing horizon. |
 Vacuum toilet system / 2250168Proposed system contains one toilet 1 placed in heated room 3 and connected through discharge valve 4 with drain pipe 5, container collector 6 connected with drain pipe 5 and device 8 to build vacuum in container-collector 6 and drain pipe 5. Container-collector is made in form of elongated vertically installed container 6 for collecting liquid sewage. Drain pipe is connected to container-collector 6 near center of its cylindrical main part. Container-collector is arranged in tight contact with room so that it is heated in height owing to heating of room. Container-collector can receive at least five toilet water drains. |
 Method of control of wc flushing valve in vacuum collector system and device for realization of this method / 2250311Proposed method of control of WC flushing valve in vacuum collector system includes opening and closing of flushing valve by means of control unit at rate ensuring opening and closing time of 0.25 and 0.4 s respectively. Device for control of WC flushing valve includes at least three working valves. Device and flushing valve are actuated by vacuum created in collector system. Said working valves may return to initial position by means of common piston-type rod made in form of cam which is actuated in its turn by piston in cylindrical chamber. First valve actuated by starting unit brings cylindrical chamber in communication with vacuum source in second valve actuated by cam which brings vacuum source in collector system in communication with drive unit of flushing valve and third valve brings flushing ring or similar unit with water source through pipes and passages. |
 Modular composite device for cleaning surface water received from agricultural lands / 2255186Modular device comprises vertical partitions, which divide thereof into receiving, overflow and sediment chambers. Device includes several identical sections provided with partition chamber, clean water chamber, oil and floating rubbish gathering chamber and has filtering dam installed in intake channel bed. |
 Toilet system including lavatory pan / 2267582Toilet system comprises lavatory pan, flushing device to supply flushing water, line connected to the lavatory pan and to sewage pipeline, means to convey pumped-out mass from lavatory pan to the line and sewage pipeline. The means comprise two valves and pressure chamber arranged in-between, wherein the valves and pressure chamber are arranged in line. Reduced pressure is created in pressure chamber to force the mass from lavatory pan and pressure inside pressure chamber is increased to convey the mass to sewage pipeline. Pressure chamber is made as piston cylinder and includes piston connected to drive means. The drive means move the piston to reduce or increase pressure inside the pressure chamber. The system also has electric control means to control the drive means and above valves so that when the mass is forced out of the pressure chamber the piston movement is performed along with bringing both valves in closed state to create reduced pressure inside the chamber. After that the first valve is rapidly opened to provide the mass inflow from lavatory pan into pressure chamber. |
 Sewage pipe connector for objectionable odor suppression / 2268965Sewage pipe connector comprises inlet tubular part connected to the pipe and arranged upstream from the pipe to create inlet sewage water channel, outlet tubular part connected to the pipe and located downstream from it to create outlet sewage water channel and suppression part defining connection sewage water channel to create sewage water flow from inlet sewage water channel to outlet sewage water passage. The connector also has dividing tubular part, which forms dividing channel extending upwards from suppression section of the suppression part and dividing sewage water channel in upward direction at suppression section. Inlet and outlet tubular parts are located one opposite another and are coaxial one to another. Sewage water channel defined by suppression section is below the lowest part of adjacent sewage water channels. The connector additionally has dividing pipe connected to front end of dividing tubular part to enlarge the dividing channel in upward direction and lid detachably attached to the front end of dividing pipe for dividing channel sealing. |
 Sewage system / 2274709Sewage system in accordance with the first embodiment comprises at least one lavatory pan and/or urinal and at least one sewage water receiver provided with discharge pipeline. The system also has accumulation vessel arranged over lavatory pan and/or urinal and communicated with the discharge pipeline of at least one sewage water receiver. Lower part of accumulation vessel has at least one outlet pipeline to communicate accumulation vessel with lavatory pan and/or urinal. If sewage water receiver connected with discharge pipeline and accumulation vessel is in room located on one level with room in which lavatory pan and/or urinal is installed fore accumulation vessel is arranged in discharge line of above sewage water receiver. The fore accumulation vessel interior is communicated with sewage water receiver and provided with exhaust pump having inlet connected with lower part of fore accumulation vessel interior and outlet linked with main accumulation vessel interior. Sewage system in accordance with the second embodiment comprises at least one lavatory pan and/or urinal with flushing tank provided with inlet valve arranged in upper part of flushing tank interior and connected to water supply system. Sewage system has at least one sewage water receiver provided with drainage pipeline and arranged in room, which is in one level with room having lavatory pan and/or urinal. The system is provided with accumulation vessel comprising exhaust pump having interior connected with drainage pipeline of at least one waste water receiver. Jet pump nozzle communicates with outlet part of inlet flushing tank valve. Mixing chamber communicates with lower part of accumulation vessel interior. Outlet part is connected with flushing tank interior. |
 Device and method for waste water cleaning used for object group / 2312955Object (independent) sewage systems include mechanical cleaning device (cesspools) and biological cleaning devices (filters, filtration fields). Filtering devices of adjacent zones are hydraulically united in single filtering device to increase discharge volume and smooth discharge irregularity due to possibility to receive peak discharge volume from different objects in different time and due to increased filtration field area at the moment of waste water discharge from one object because of all filtering devices connection in single filtering device. Some zones may contain no filtering devices and waste water therefrom is supplied into adjacent zones. |
 Vacuum toilet system / 2316632Vacuum toilet system comprises lavatory pan, water flushing system, control unit and control button, accumulation tank with pressure and temperature sensors, with liquid level indicator and with heater electrically linked to control unit. System also has vacuum pump and conveyance pipelines. Vacuum pump has heater, at least one environment pressure sensor, conveyance pipeline and accumulation tank pressure sensor, environment temperature sensor, rotor blade temperature sensor and oil level indicating device electrically linked with control unit. |
FIELD: construction.
SUBSTANCE: vacuum, i.e. pressure level, and efficiency of the system is maintained and controlled, whilst controlling the speed of rotation of a source/sources of vacuum measured by number of rotations per minute. The source of vacuum has a liquid-ring screw pump driven by an electric motor. Number of rotations per minute of each motor in the system is controlled by means of a programmable logical controller. The controller is programmed to maintain the one first source of vacuum as connected, until it reaches the specified maximum number of rotations per minute, with subsequent connection of the next, second, source of vacuum, if the vacuum system requires higher efficiency of pumping. The programmable logical controller may also be programmed to control the number of rotations per minute for each source so that sources operate with identical speed of rotation in the range from least or highest number of rotations per minute depending on the required vacuum, but with connection of the additional source of vacuum, when higher efficiency is required.
EFFECT: efficient method to control vacuum pumps or other sources of vacuum in a vacuum sewage system.
4 cl, 4 dwg
The technical field to which the invention relates
The present invention relates to a method of controlling the source/sources vacuum and, therefore, the vacuum sewer system. Specifically, the invention relates to the management of one or more hydraulic liquid ring screw pumps in the specified system containing a source/sources vacuum one or more tubular collectors or suction pipe, connected to a power vacuum, and one or more toilet bowls, urinals, sinks wastewater and other similar devices, connected to inlet pipe/suction pipelines.
The level of technology
Vacuum sewer systems of the specified type are widely known: they occupy leading positions in use on Board ships, aircraft and trains. However, in terrestrial environments, the use of such systems is increasing, and the basis for this growth is, first of all, the reduction of water consumption and ease of manipulation of waste water and its treatment, and easy adaptability of the system to the installation required for her pipes.
In 1987 the applicant of the present invention has proposed (see patent EP 0287350) new vacuum sewer system in which a vacuum is created by liquid ring screw pump, with specified pump is also used for removing impurities from the connected vacuum tank.
Patent EP 0454794 also belonging to the applicant of the present invention, additionally offers a radical modernisation of vacuum sewer systems, in which liquid ring pump is equipped with a grinding tool and connected directly to the suction pipe system. A vacuum is created in the pipe, suction impurity which are removed directly from the system by means of the pump.
Further, US patent # 4034421 is vacuum sewer system, which provides for a tank for collecting sewage from toilets. To Baku is connected to the input and output of the circulation pump is made with the possibility to create circulation environments contained in the tank, closed circuit with the purpose of their mixing, interaction and aeration. To establish the vacuum required to sewer systems, closed circuit introduced Gidrostroy pump.
The common drawback of all these systems, and, in particular, large systems containing a large number of toilets and other similar devices and two or more sources of vacuum that is the work of these sources with breaks (in the mode "on/off"), depending on the level of the vacuum in the system. Thus, vacuum pumps, or any other sources of vacuum begin to function, when the pressure reaches the upper limit (usually sorokaprotsentnuju vacuum, tA pressure, reduced by 40% relative to the atmospheric pressure), and off when reaching the lower limit level pressure (usually shestidesyatiletie vacuum). Such intermittent operation sources of vacuum ineffective due to increased energy expenditure and causes increased wear sources, leading to increased maintenance system. In addition, management of sources of vacuum in the "on/off" if they work with a constant high speed (during operation) gives the contribution to the increased generation of heat supplied to the sources, thereby increasing their temperature. When using liquid ring pumps, this leads to the evaporation of the liquid in the pump and accelerate the destruction of liquid ring pump, which is reflected, in turn, the loss of vacuum pumps of this type.
Disclosure of the invention
In the framework of the present invention is offered the way of control vacuum pumps or other sources of vacuum in a vacuum Sewerage system in which the listed lacks a drastically reduced or even eliminated and which is more energy-efficient and uses less amount of maintenance.
The invention is characterized by the traits that are included in an independent claim 1 of the attached formula. The preferred features of the invention included in dependent claims.
Brief description of drawings
Next, the invention will be described in more detail and with examples and links to enclosed drawings, where
figure 1 presents a schematic depiction of the example of vacuum sewer systems;
figure 2-4 shows the graphics performance, capacity and efficiency, obtained in the result of testing of the invention.
The implementation of the invention
As already mentioned, figure 1 illustrates a vacuum sewer systems containing two sources 1 vacuum, having the form of a liquid ring screw pumps with built-in parallel attached crushers, and shared suction pipe (pipe collector) 2, with one end connected (connected) to the sources of the vacuum, and the other to several toilets, urinals and similar devices (3, 4) through the branches off the pipelines 6. By sources 1 vacuum in the pipe 2 and in pipelines 6 creates a vacuum, and when flushing toilet bowls, urinals and similar devices successive amounts of water and air is discharged down to sources of vacuum and output via exit 5 source/sources.
Figure 1 shows that, as already mentioned, usually operated on/off sources of vacuum. Thus, when the system is in a state not too active use, for example the middle of the night, i.e. when toilets are not used or only used a small part, there is only one source of vacuum and then only when required (i.e. when the pressure comes on top of a specified level (sorokaprotsentnuju vacuum)). As the only source of vacuum again bring pressure on the lower level you specified (shestidesyatiletie vacuum), the source turns off.
In the active mode of application, for example in the morning, when using a large number of toilets and other similar devices, both sources vacuum will work simultaneously, and depending on the demand of the vacuum in the course of the day or night only one source will work with interruptions. Alternatively, one or both of source will work continuously and/or intermittently.
According to the present invention is offered the method of controlling the sources of vacuum (or the control mode for the specified sources) in vacuum sewer system. The method involves continuous operation of the sources, but with control their speed, defined established under the pressure and capacity when creating a vacuum.
In vacuum sewer sources vacuum usually get energy from the electric engines, and the rotation speed (rpm) for each engine in the system, preferably is controlled by a programmable logic controller (PLC) via frequency Converter on the basis of the signals received from the pressure sensor. Thus, according to the present invention choose the required vacuum level (usually 50%) and configure the PLC to manage the parameter "number of revolutions per minute" of the engine/engines source/sources vacuum on the basis of the signal received from the detector of pressure in the vacuum system. In systems with two or more sources of vacuum, running in parallel, for the preferred mode of control is necessary, proceeding from the amount of the required vacuum in any time, to program the PLC to work one (the first) source up until the specified source reaches the specified maximum number of revolutions per minute, and then start the next (second) source if the vacuum system requires an increase in performance when creating a vacuum. Further, when the second source reaches the specified maximum number of revolutions per minute, but will need additional capacity include third, fourth, etc. sources vacuum, which then operate at speeds required for the selected level of the vacuum in the system. Thus, the chosen vacuum level (50%) is maintained at all times.
Alternative management regime for vacuum systems that have one or more sources of vacuum, is the following. Programming of PLC on the control parameter "number of revolutions per minute" for each source, so that the sources have worked with the same speed in the range from minimal to maximal values of this parameter according to the required vacuum level, with the inclusion of the new vacuum source when you want to improve productivity and working source/working sources functions are functioning to the maximum extent possible the required level. This option controls multiple sources and parameter "number of revolutions per minute" for each source based on the specified vacuum and demand performance when creating a vacuum can be as effective as described above preferred option implementation, where everybody (first, second) source mode full speed, and this mode is supported to enable the next source 1.
As a precaution, PLC preferably be programmed to trigger the alarm in the situation when all the system pumps are up and running at full capacity (i.e. with a maximum number of revolutions per minute), and the specified level of vacuum after the expiration of a certain period of time is not reached. In this case, you need to check vacuum systems for possible leakage or other defects that could lead to low pressure.
Equipment:
Source vacuum
Liquid ring screw pump JETS NT 220
Electric motor
Lönne 14G186-4AA11-Z 230/400 V 50 Hz - 22 kW, 1465 rpm 460 V 60 Hz - 23,3 kW, 1765 rpm
Inverter (frequency control)
Mitsubishi FR-F740-00620 EU
PLC (control and registration)
Mitsubishi Melsec FXN-16MR
Pressure sensor
GE Druck PTX 1400
Test conditions:
Room temperature
23 degrees C
Feedwater:
Temperature
11CConsumption
20 l/min
Air pressure
99300 PA
Lifting height
(source vacuum pump/)
2 mTests procedure
Used in the test source vacuum suction line (inlet) hole and the outlet connected by tube path to the tank with water (not shown). Vacuum received by smoothly adjusting the throttle valve (also not shown), located on tube circuit before the inlet of the pump. For each test after each work cycle source of vacuum tank for 10 minutes aired before turning on the source, who then worked for 3 min before each test.
Testing results are given in figure 2-4. Thus, figure 2 illustrates the dependence of the performance Q (m3 /h) pumping from the vacuum level (%) liquid ring screw pump with different speeds in the range of 30 to 60 Hz.
Figure 3 illustrates the dependence of the power P (kW) from the vacuum level for the same pump with the same speed.
Figure 4 illustrates the dependence of the effective Q/P (m 3 /h/kW) from interest rate vacuum level for the same pump and at the same speeds.
From the graphs in figure 2-4 we can conclude that there is a possibility to maintain the vacuum is below 40%, while maintaining sufficient performance at lower speeds in the range 60-30 Hz.
1. The method of control by one or more sources (1) vacuum and thus vacuum in vacuum sewer system containing at source (sources) (1) one or more tubular collectors or suction pipe (2), is connected to a power vacuum, and one or more toilet bowls, urinals, sinks wastewater and other similar devices (3, 4), connected to inlet pipe through the branches off the pipelines (6), and the vacuum, i.e. the level of pressure, and performance support and control by controlling the speed of the source (s) (1) vacuum, as measured by the number of revolutions per minute, based on specific requirements vacuum and vacuum source is liquid ring screw pump driven by an electric motor, and a number of revolutions per minute of every engine in the system is controlled by a programmable logic controller (PLC), wherein the PLC programming to maintain included one of the first source vacuum until, until it reaches the specified maximum number of revolutions per minute, with the subsequent start of the next, second, the vacuum source, if the vacuum system requires high performance exhaust.
2. The method according to claim 1, wherein the number of revolutions per minute of every engine in the system is controlled via frequency Converter on the basis of signals from the pressure sensor.
3. The method of control by one or more sources (1) vacuum and thus the vacuum sewer system containing over the source (sources) (1) one or more tubular collectors or suction pipe (2), is connected to a power vacuum, and one or more toilet bowls, urinals, sinks wastewater and other similar devices (3, 4), connected to the suction pipeline through branches off the pipelines (6), and the vacuum, i.e. the level of pressure, and performance support and control by controlling the speed of the source (s) (1) vacuum, as measured by the number of revolutions per minute, based on specific requirements for vacuum and vacuum source is liquid ring screw pump driven by an electric motor, and a number of revolutions per minute of every engine in the system is controlled by a programmable logic controller (PLC), wherein the PLC program management number of rpm for each source, so that the sources have worked with the same speed in the range from smaller to larger number of revolutions per minute depending on the required vacuum, but with the inclusion of an additional source of vacuum when you need greater performance and operating the source (working sources) is (are) the maximum required number of revolutions per minute.
4. The method according to claim 1, wherein the number of revolutions per minute of every engine in the system is controlled via frequency Converter on the basis of signals from the pressure sensor.