RU2596083C1 - System for pumping out sewage sludge - Google Patents

Abstract

FIELD: treatment plants.

SUBSTANCE: invention relates to water disposal, particularly to systems for pumping liquid sewage sludge. System includes a tank with a feed pipe, at least one pump with pressure and suction pipelines, a discharge pipeline and an air-hydraulic column. Column is made in form of a vertical pipe with a pipe for feeding initial sludge and a pipe for discharging degassed sludge located in lower part, and with pipe for discharging gases for degassing. Pump suction pipeline is connected with branch pipe to discharge degassed sludge of air-hydraulic column. Pump has a flow part which cannot be clogged with long-fibre substances flow part and/or system is additionally equipped with low-speed high-torque crusher of long-fibre inclusions, installed on discharge pipeline and/or pump suction pipeline.

EFFECT: higher system reliability.

1 cl, 1 dwg

Description

The system relates to the field of water disposal, in particular to pumping systems (from sedimentation tanks, tanks, etc.) of non-dehydrated sewage sludge, in which fermentation gases can form and contain long-fiber substances.

The well-known "pumping unit for pumping a gas-liquid mixture", in which a vane pump separator comprises a housing and a hollow shaft with working blades mounted therein. The device for suctioning the gas phase is made in the form of a low pressure source (IND) communicated through the cavity of the shaft with the flow part of the pump-separator in the place of separation of the gas phase. A flow regulator is installed between the shaft cavity and the IND, made in the form of a cylindrical hollow nozzle with inlet and outlet tangential channels at the ends, a radial channel between them and two central holes. One of the holes is indicated by a hydraulic line with an IND. The flow regulator contains a regulating body driven by a differential pressure sensor, one controlled cavity of which is connected to the second central hole, the other to the radial channel. The output tangential channels are communicated with the IND through the throttle washer (see copyright certificate SU No. 1779796. IPC F04D31 / 00 / Shcherbatenko I.V., Khankin V.P .; publ. 07.12.1992).

The known pumping unit cannot be used for pumping undehydrated sewage sludge, the hollow shaft and holes will become clogged with the long-fiber substances contained in the sediments.

The well-known system "Energy-saving system of operational management of energy consumption during the operation of sewage pumping stations" (see patent for utility model of the Russian Federation No. 119824. IPC F04D15 / 00 (2006.01) / Karmazinov F.V., Kinebas A.K., Trukhin Yu.A. , Ignatchik V.S., Ignatchik S.Yu. et al .; publ. 08.28.2012, Bull. No. 24). The specified system includes:

- a water pumping unit comprising a receiving tank with a supply pipe, at least two pumps with pressure and suction pipes, on which check valves are installed. Pressure pipelines and pumps are connected to an internal pressure manifold equipped with at least two outlets. The pumps are additionally equipped with electric drives, respectively. The module is also additionally equipped with at least one power supply unit for the pumps, at least two power cables and one measuring cable. In this case, the power supply unit of the pumps is connected to the electric drive of the pump by means of a power cable, and by means of a power cable it is connected to the power of the pump;

- a module of instrumentation, comprising at least a power consumption meter connected by a measuring cable to the pump power supply;

- a module for analyzing diagnosed parameters, containing an archive unit and an additional resistance analysis unit, while the output of the power consumption meter is connected to the input of the archive unit, the output of the archive unit to the input of the additional resistance analysis unit. There is a development option when the module for analyzing diagnosed parameters is additionally equipped with an internal overflow analysis unit, the input of which is connected to the output of the archive unit;

- a power consumption optimization module comprising an alarm message generating unit, wherein the outputs of the additional resistance analysis unit, the internal overflow analysis unit are connected to the input of the emergency message generating unit.

- the water pumping module can be additionally equipped with a low-speed high-torque solid particle grinder installed on the inlet pipe and / or in the receiving tank.

This system is characterized by low reliability, because when pumping out sewage sludge, interruptions in its operation are possible due to fermentation gases released from the sludge in the suction pipe of the pump as a result of pressure reduction (according to Henry's law). The presence of fermentation gases in front of the pump negatively affects its operation: supply, pressure, efficiency are reduced, and operation becomes unstable. With an increase in the amount of gas, when precipitation cannot be brought to the impeller, the supply decreases to zero. In addition, the long-fiber substances contained in the sediments will clog the flow parts of the pumps.

The objective of the invention is to increase the reliability of the known system.

The problem is solved so that the known system, including a tank with a supply pipe, at least one pump with pressure and suction pipelines, in accordance with this utility model is additionally equipped with:

- discharge pipe;

- an air-hydraulic column, made in the form of a vertical pipe with a lower plug, hermetically welded in the lower part of the vertical pipe, an upper plug, hermetically welded in the upper part of the vertical pipe, with a nozzle for supplying initial sediments and a nozzle for removing degassed sediments located in the lower part of the vertical pipes above the lower plug, with a gas outlet pipe for degassing connected to the upper plug.

In this case, the upper plug is located above the level of sediment in the tank, the discharge pipe connects the tank to the pipe for supplying the initial sediment of the air-hydraulic column, the suction pipe of the pump is connected to the pipe for removing the degassed sediments of the air-hydraulic column.

In addition, the pump is made with a non-clogging long-fiber substances flow part and / or the system is additionally equipped with a low-speed high-torque chopper of long-fiber inclusions installed on the discharge pipe and / or the suction pipe of the pump.

Distinctive features of the claimed rainfall system are:

1. Additional supply of the system with a discharge pipe.

2. Additional supply of the system with an air-hydraulic column.

3. The implementation of the air-hydraulic columns in the form of a vertical pipe with a lower plug, hermetically welded in the lower part of the vertical pipe, the upper plug, hermetically welded in the upper part of the vertical pipe.

4. Supply of the air-hydraulic column with a pipe for supplying initial sediments and a pipe for removing degassed sediments located in the lower part of the vertical pipe above the lower cap.

5. Supply of the air-hydraulic column with a branch pipe for degassing gases connected to the upper plug

6. The location of the upper plug above the level of sediment in the tank

7. Connection of the outlet pipe of the tank to the pipe for supplying the initial precipitation of the air-hydraulic column.

8. The connection of the suction pipe of the pump to the pipe for the removal of degassed sediments of the air-hydraulic columns.

9. The implementation of pumps with non-clogging long-fiber substances flowing part.

10. Additional supply of the system with a low-speed high-torque shredder of long-fiber inclusions;

11. Installation of a low-speed high-torque chopper of long-fiber inclusions on the discharge pipe and / or suction pipe of the pump.

The combined use of the specified distinctive features in the claimed device allows to obtain a positive effect, which consists in the fact that the scope of the system is expanding, because It can be used to pump sewage sludge. This is achieved due to the presence of distinctive features 1 - 11, because:

- due to the use of distinguishing features 1 - 7, it becomes possible to remove gases released from sediments in the air-hydraulic column;

- due to the use of the hallmark 8, only degassed sediments will be in the suction pipe of the pump;

- due to the use of the hallmark 9, the pumps will not become clogged with long-fiber substances;

- due to the use of distinctive features 10 - 11, only sediments with crushed long-fiber substances will be in the suction pipe of the pump.

The system proposed by the authors is structurally different from the prototype.

The drawing shows a diagram of "Systems for pumping sewage sludge."

The system contains:

- tank 1 with a supply pipe 2;

- pump 3 with pressure 4 and suction 5 pipelines;

- discharge pipe 6;

- air-hydraulic column 7, made in the form of a vertical pipe 8 with a lower plug 9, hermetically welded in the lower part of the vertical pipe 8, the upper plug 10, hermetically welded in the upper part of the vertical pipe 8, with a pipe 11 for supplying initial sediments and a pipe 12 for removal degassed sediments located in the lower part of the vertical pipe 8 above the lower plug 9, with a pipe 13 for degassing gases connected to the upper plug 10. In this case, the upper plug 10 is located above the level of precipitation in the tank 1, about vodyaschy conduit 6 connects the tank 1 with a pipe 11 for supplying air and starting precipitation hydraulic column 7, the suction conduit 5 of the pump 3 is connected to the outlet pipe 12 air-precipitation degassed hydraulic column 7.

The pump 3 is made with non-clogging long-fiber substances flowing part. This element of the pump 3 (not shown) is available for understanding by specialists on the basis of the prior art of their semantic content, because is an element of any pump. The present invention allows various versions of the flow path, for example, the use of profiled wheels, an increase in the size of the bore sections, etc.

There is a variant of the system when the system is additionally equipped with a low-speed high-torque shredder 14 of long-fiber inclusions installed on the discharge pipe 6 and / or the suction pipe 5 of the pump 3.

The system operates as follows. Sludge through the supply pipe 2 enters the tank 1, in which, depending on the technological purpose, it is condensed, temporarily stored, etc. At the same time, it is anaerobic (in an oxygen-free mode) fermentation with the release of fermentation gases. Some of them, in accordance with Henry's law (the solubility of gases is proportional to pressure), dissolves in the water contained in the sediment under pressure equal to the height of their layer in the tank 1.

Further, when the pump 3 is turned on, precipitations saturated with fermentation gases, through the discharge pipe 6 through the air-hydraulic column 7, enter the suction pipe 5 of the pump 3, and then are discharged through the pressure pipe 4 for further processing. As you move along the discharge pipe 6, the pressure of the precipitation in it decreases (pump 3 creates a vacuum) as a result of which part of the saturated gases is released from the water, forming a gas plug. However, in the proposed system, in contrast to the prototype, the gas plug does not overlap the suction pipe 5, since in the air-hydraulic column 7 there is a separation of gases from precipitation (gas is lighter than water) and their removal through the pipe 13 of the outlet of the degassing gases.

In addition, the performance of the proposed system in the conditions of sedimentation of long-fiber substances is provided in three ways. The first option, when the pump 3 is used in the system with a non-clogging long-fiber substances flowing part. Under these conditions, long-fiber substances are pumped with sediments for further processing. The second option, when the low-speed high-torque shredder 14 of long-fiber inclusions is additionally installed on the outlet pipe 6 and / or the suction pipe 5 of the pump 3. Under these conditions, long-fiber substances are crushed in a grinder and pumped for further processing by crushed ones. The third option, when the pump 3 is simultaneously used in the system with a non-clogging long-fiber substances flow part and a low-speed high-moment shredder 14 of long-fiber inclusions is additionally installed on the discharge pipe 6 and / or the suction pipe 5 of the pump 3.

Claims (1)

A system for pumping wastewater sludge, including a tank with a supply pipe, at least one pump with a pressure and suction pipes, characterized in that the system is additionally equipped with a discharge pipe, an air-hydraulic column, made in the form of a vertical pipe with a bottom plug, hermetically welded in the lower part of the vertical pipe, the top cap, hermetically welded in the upper part of the vertical pipe, with a pipe for supplying initial sediments and a pipe for removing degassed sediments s located in the lower part of the vertical pipe above the lower plug, with a degassing pipe connected to the upper plug, while the upper plug is located above the level of sediment in the tank, the discharge pipe connects the tank to the pipe for supplying the initial precipitation of the air-hydraulic column, the suction pipe the pump is connected to the branch pipe for the removal of degassed sediments of the air-hydraulic column, in addition, the pump is made with non-clogging long-fiber substances flow part and / and whether the system is additionally equipped with a low-speed high-torque chopper of long-fiber inclusions installed on the discharge pipe and / or the suction pipe of the pump.

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