A kind waste transfer station leachate vacuum pumping system

Abstract

The utility model discloses a garbage treatment technical field's a kind of garbage transfer station percolate vacuum suction system, including sewage collection tank, filter tank and vacuum storage unit, the sewage collection tank is used to collect permeate, and is communicated with filter tank by pipeline, the filter tank is used to filter residue in permeate, and is communicated with vacuum storage unit by pipeline, the vacuum storage unit includes vacuum sewage tank group and water circulation water tank, the liquid inlet of the vacuum sewage tank group is communicated with the liquid outlet of filter tank by pipeline, the top of the vacuum sewage tank group is communicated with the air intake of vacuum pump group by vacuum air extraction pipeline, the water circulation water tank is used to provide circulating working fluid for vacuum pump group, the gas outlet of the water circulation water tank is connected with gas-liquid separator inlet end by pipeline, gas after separation by the gas-liquid separator is directly discharged, and separated liquid is backflowed to water circulation water tank by pipeline.The utility model can realize that percolate is safely and efficiently transmitted.

Description

Technical Field

[0001] This utility model relates to the fields of environmental engineering and waste treatment technology, and in particular to a vacuum suction system for leachate from a waste transfer station. Background Technology

[0002] Waste transfer stations are crucial hubs for urban waste collection and treatment, connecting waste sources with end-of-life treatment systems, and are an indispensable link in the urban household waste collection and disposal system. Household waste undergoes preliminary compression at the initial collection station before being transported by garbage trucks to the transfer station. At the transfer station, it is mechanically compressed again before being transported by garbage trucks to the final treatment system. The leachate from the transfer station, if left untreated, will cause serious pollution to the surrounding environment.

[0003] Currently, the collection method for leachate from waste transfer stations is still mainly gravity flow collection. Its shortcomings are: the leachate from waste transfer stations contains high concentrations of organic matter, colloidal substances and suspended particles, with extremely high viscosity and poor fluidity, resulting in slow transmission speed. Especially in long-distance or complex pipeline layout scenarios, it is easy to form dead zones, which greatly reduces the treatment efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a vacuum suction system for leachate from a waste transfer station, achieving safe and efficient leachate transfer.

[0005] The purpose of this utility model is achieved as follows: A vacuum suction system for leachate from a waste transfer station includes a wastewater collection tank, a filter tank, and a vacuum storage unit. The wastewater collection tank is used to collect leachate and is connected to the filter tank via a pipeline. The filter tank is used to filter residues in the leachate and is connected to the vacuum storage unit via a pipeline. The vacuum storage unit includes a vacuum wastewater tank assembly, a vacuum pump assembly, a water circulation tank, and a gas-liquid separator. The inlet of the vacuum wastewater tank assembly is connected to the outlet of the filter tank via a pipeline. The top of the vacuum wastewater tank assembly is connected to the exhaust port of the vacuum pump assembly via a vacuum extraction pipeline. The water circulation tank is used to provide circulating working fluid for the vacuum pump assembly. The exhaust port of the water circulation tank is connected to the inlet of the gas-liquid separator via a pipeline. The gas separated by the gas-liquid separator is directly discharged, and the separated liquid flows back to the water circulation tank via a pipeline.

[0006] In use, the sewage collection tank collects leachate from the garbage transfer station and then transports it to the filter tank through a suction pipeline to intercept residues and complete pretreatment. The purified leachate enters the inlet of the vacuum sewage tank group through a pipeline. Simultaneously, the vacuum pump group evacuates the vacuum sewage tank group through a vacuum extraction pipeline, creating a negative pressure environment inside the tank. Under the action of atmospheric pressure and the pressure difference inside the tank, the leachate is automatically drawn into the tank for storage. The vacuum sewage tank group ensures continuous operation through alternating suction and discharge from multiple tanks. The vacuum pump group operates using the circulating working fluid provided by the water circulation tank after treatment by the gas-liquid separator as the medium. Its exhaust gas is separated by the gas-liquid separator, with the gas being discharged directly and the separated liquid returning to the water tank for recycling.

[0007] Compared with existing technologies, the advantages of this utility model are as follows: It achieves blockage-free and efficient collection through vacuum negative pressure transmission, improving transmission efficiency; the addition of a filter tank at the front end performs preliminary filtration of the leachate, removing residues and preventing subsequent pipelines, vacuum sewage tanks, or vacuum pumps from failing due to blockage, thus ensuring long-term stable system operation, especially suitable for scenarios with complex leachate composition and many impurities; the vacuum sewage tank group adopts a multi-tank parallel design, allowing one tank to be in suction mode while another can be drained or cleaned, enabling continuous operation and avoiding system downtime due to single tank drainage; the vacuum pump group uses water as the working medium, with a water circulation tank providing a stable circulating working fluid. Simultaneously, a gas-liquid separator separates the liquid in the vacuum pump exhaust and returns it to the water tank, achieving working fluid recycling and reducing water consumption; the gas-liquid separator separates and returns the liquid, allowing only clean gas to be discharged, preventing direct liquid discharge and secondary pollution.

[0008] As a further improvement of this utility model, the vacuum storage unit also includes a positive pressure gas storage tank and a positive pressure control valve block. The positive pressure control valve block is installed on the vacuum pumping pipeline. The output end of the positive pressure gas storage tank is connected to the inlet end of the positive pressure control valve block through a high-pressure gas pipe. The vacuum sewage tank group is equipped with a weighing sensor and a drain valve. The signal output end of the weighing sensor is linked with the control system of the positive pressure control valve block and the drain valve.

[0009] As a further improvement of this utility model, the vacuum storage unit also includes the valve gas storage tank, the output end of which is connected to the drive end of each pneumatic valve through a pressure regulating valve and multiple pneumatic pipelines.

[0010] As a further improvement of this utility model, the vacuum storage unit also includes an air compressor supply module, wherein the compressed air output by the air compressor supply module is connected to the valve storage tank and the positive pressure storage tank respectively through the main pipeline.

[0011] As a further improvement of this utility model, the coolant output end of the water circulation tank is sealed and connected to the coolant inlet end of the vacuum pump group to form a closed circulation loop. The water circulation tank has a built-in liquid level sensor, temperature sensor and upper drain valve block. The signal output ends of the liquid level sensor and temperature sensor are linked with the control system of the upper drain valve block.

[0012] As a further improvement of this utility model, the sewage collection tank includes a tank body with a sloping bottom structure. The tank body is provided with a water guide channel, a stirring pump and a suction port. The lowest point of the water guide channel is connected to the upper side of the tank body. A primary filter screen is provided at the connection between the tank body and the water guide channel. The stirring pump and the suction port are located directly above the lowest point of the tank body. The stirring end of the stirring pump penetrates into the tank body and stirs the leachate.

[0013] As a further improvement of this utility model, an openable and closable maintenance cover is also provided on the upper side of the box.

[0014] As a further improvement of this utility model, the housing has a built-in liquid level sensor, and the signal output terminal of the liquid level sensor is linked to the control system of the stirring pump.

[0015] As a further improvement of this utility model, the filter tank is provided with a secondary filter screen and a pneumatic valve at the bottom. A filter residue screw conveying device is provided below the pneumatic valve. The filter residue screw conveying device is used to convey the filter residue to the compressor hopper. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a three-dimensional structural diagram of the sewage collection box in this utility model.

[0019] Figure 3 This is a top view of the vacuum storage unit in this utility model.

[0020] The components include: 1. Sewage collection tank; 101. Tank body; 102. Water guide channel; 103. Mixing pump; 104. Suction port; 105. Inspection cover plate; 106. Primary filter screen; 2. Filter tank; 3. Vacuum storage unit; 301. Vacuum sewage tank group; 302. Vacuum pump group; 303. Water circulation tank; 304. Gas-liquid separator; 305. Positive pressure air storage tank; 306. Positive pressure control valve block; 307. Valve air storage tank; 308. Air compressor supply module; 309. Vacuum extraction pipeline; 310. Upper drain valve block; 4. Suction pipeline; 5. Filter residue screw conveyor device; and 6. Power control cabinet. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1-3 The waste transfer station leachate vacuum suction system shown includes a wastewater collection tank 1, a filter tank 2, and a vacuum storage unit 3. The wastewater collection tank 1 is used to collect leachate and is connected to the filter tank 2 through a suction pipe 4. The filter tank 2 is used to filter the residue in the leachate and is connected to the vacuum storage unit 3 through a pipe.

[0023] Specifically, the wastewater collection tank 1 includes a tank body 101, a water guide channel 102, a stirring pump 103, a suction port 104, and a liquid level sensor. The tank body 101 adopts a bottom sloping structure design, which guides the leachate to naturally collect to the lowest point through the inclined bottom surface to eliminate dead corners of liquid accumulation. The upper side of the tank body 101 is connected to the sloping water guide channel 102. A primary filter screen 106 is installed at the lowest point of the water guide channel 102 where it connects with the tank body 101. This serves to both assist in the collection of water flow through the water guide channel 102 and to filter out water through the primary filter screen 106. Large particles of impurities are intercepted to prevent them from directly entering subsequent pipelines. The stirring pump 103 and the suction port 104 are arranged on the upper side of the tank 101 and directly above the lowest point of the tank 101. The stirring end extends below the liquid surface. With the help of the built-in liquid level sensor, when the liquid level reaches the suction threshold, the stirring pump 103 is started first to break up the bottom sediment and remove the caking, and then suction is performed to prevent the suction port 104 from being blocked from the source. The upper side of the tank 101 is provided with an openable and closable maintenance cover 105 to facilitate daily inspection and internal cleaning and maintenance.

[0024] The filter tank 2 is equipped with a secondary filter screen to filter the initially collected leachate a second time, accurately intercepting fine residues. A pneumatic valve is installed at the bottom of the filter tank 2, which can automatically control the opening and closing according to the amount of filter residue accumulated, realizing unmanned operation of the sludge discharge process. A filter residue screw conveyor 5 is installed below the corresponding pneumatic valve. The filter residue screw conveyor 5 continuously conveys the filter residue to the compressor hopper through the rotation thrust of the screw blades, and compresses it together with the garbage.

[0025] Vacuum storage unit 3 includes a vacuum wastewater tank assembly 301, a vacuum pump assembly 302, a water circulation tank 303, a gas-liquid separator 304, a positive pressure gas storage tank 305, a positive pressure control valve block 306, a valve gas storage tank 307, and an air compressor supply module 308. The vacuum wastewater tank assembly 301 serves as the core for temporary storage of leachate. Its inlet is connected to the outlet of the filter tank 2 via a pipeline, and its top is connected to the exhaust port of the vacuum pump assembly 302 via a vacuum extraction pipeline 309. Water circulation... The coolant output end of the water tank 303 is sealed to the coolant inlet end of the vacuum pump group 302, forming a closed loop to provide circulating working fluid for the vacuum pump group 302. The exhaust port of the water circulation tank 303 is connected to the inlet end of the gas-liquid separator 304 through a pipeline. The gas separated by the gas-liquid separator 304 is directly discharged, and the separated liquid flows back to the water circulation tank 303 through a pipeline, forming a closed loop circulation of working fluid, which greatly reduces water consumption and waste liquid discharge.

[0026] The positive pressure control valve block 306 is installed on the vacuum pumping pipeline 309. The output end of the positive pressure storage tank 305 is connected to the inlet end of the positive pressure control valve block 306 through a high-pressure air pipe. The vacuum sewage tank group 301 is equipped with a weighing sensor and a drain valve. The signal output end of the weighing sensor is linked with the control system of the positive pressure control valve block 306 and the drain valve. The compressed air output by the air compressor supply module 308 is connected to the valve storage tank 307 and the positive pressure storage tank 305 through the main pipeline. The valve storage tank 307 then provides a stable air source for the pneumatic valves and other actuators at the bottom of the vacuum sewage tank group 301 through a pressure regulating valve and multiple pneumatic pipelines, ensuring that the liquid discharge and switching actions are accurate and controllable.

[0027] The water circulation tank 303 has a built-in liquid level sensor, temperature sensor and upper drain valve block 310. The signal output terminals of the liquid level sensor and temperature sensor are linked with the control system of the upper drain valve block 310. When the liquid level exceeds the limit or the water temperature rises abnormally, the control system automatically triggers the upper drain valve block 310 to discharge excess liquid or automatically replace water, so as to maintain the stability of the liquid level and temperature of the working fluid in the circulation system.

[0028] The system is also equipped with a power control cabinet 6, which integrates the power system, gas supply system and control system. Through unified power distribution, gas control and logic operation, it realizes the efficient coordination and intelligent operation of each component.

[0029] In use, to achieve continuous operation and intelligent drainage, the vacuum sewage tank unit 301 integrates a weighing sensor to monitor the weight of the leachate in the tank in real time, and the signal is linked to the control system: when the liquid level reaches the standard and drainage is required, the positive pressure control valve block 306 opens under the command of the control system, the positive pressure air storage tank 305 injects compressed air into the tank through the high-pressure air pipe, and the drain valve automatically opens. Gravity and positive pressure work together to quickly drain the leachate to the sewage collection tank. After drainage, the vacuum pump unit 302 restarts to restore the negative pressure inside the tank and enters the next suction cycle. The advantages of this invention are: the sewage collection tank 1, through sloped flow guidance, pre-filtration, dynamic stirring to break blockages, and intelligent linkage control, significantly improves the impurity interception capacity and flowability of the leachate in the initial stage of collection, reducing the risk of subsequent system blockage, while the ease of maintenance ensures long-term operational stability; the filter tank 2 reduces the cost of manual sludge removal and the risk of secondary pollution from filter residue, and strengthens the protective effect of the pre-treatment on subsequent vacuum transmission.

[0030] The above description of the embodiments is only for the purpose of helping to understand the structure and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A vacuum suction system for leachate from a waste transfer station, characterized in that, The system includes a wastewater collection tank, a filter tank, and a vacuum storage unit. The wastewater collection tank collects leachate and is connected to the filter tank via a pipeline. The filter tank filters residue from the leachate and is connected to the vacuum storage unit via a pipeline. The vacuum storage unit includes a vacuum wastewater tank assembly, a vacuum pump assembly, a water circulation tank, and a gas-liquid separator. The inlet of the vacuum wastewater tank assembly is connected to the outlet of the filter tank via a pipeline. The top of the vacuum wastewater tank assembly is connected to the exhaust port of the vacuum pump assembly via a vacuum extraction pipeline. The water circulation tank provides circulating working fluid for the vacuum pump assembly. The exhaust port of the water circulation tank is connected to the inlet of the gas-liquid separator via a pipeline. The gas separated by the gas-liquid separator is directly discharged, and the separated liquid flows back to the water circulation tank via a pipeline.

2. The vacuum suction system for leachate from a waste transfer station according to claim 1, characterized in that, The vacuum storage unit also includes a positive pressure gas tank and a positive pressure control valve block. The positive pressure control valve block is installed on the vacuum pumping pipeline. The output end of the positive pressure gas tank is connected to the inlet end of the positive pressure control valve block through a high-pressure gas pipe. The vacuum sewage tank group is equipped with a weighing sensor and a drain valve. The signal output end of the weighing sensor is linked to the control system of the positive pressure control valve block and the drain valve.

3. The vacuum suction system for leachate from a waste transfer station according to claim 2, characterized in that, The vacuum storage unit also includes the valve gas storage tank, the output end of which is connected to the drive end of each pneumatic valve through a pressure regulating valve and multiple pneumatic pipelines.

4. The vacuum suction system for leachate from a waste transfer station according to claim 3, characterized in that, The vacuum storage unit also includes an air compressor supply module, and the compressed air output by the air compressor supply module is connected to the valve storage tank and the positive pressure storage tank through the main pipeline.

5. A vacuum suction system for leachate from a waste transfer station according to claim 1, characterized in that, The coolant output end of the water circulation tank is sealed to the coolant inlet end of the vacuum pump unit to form a closed circulation loop. The water circulation tank has a built-in liquid level sensor, temperature sensor and upper drain valve block. The signal output ends of the liquid level sensor and temperature sensor are linked to the control system of the upper drain valve block.

6. The vacuum suction system for leachate from a waste transfer station according to claim 1, characterized in that, The wastewater collection tank includes a tank body with a sloping bottom. The tank body is equipped with a water guide channel, a stirring pump, and a suction port. The lowest point of the water guide channel is connected to the upper side of the tank body. A primary filter screen is installed at the connection between the tank body and the water guide channel. The stirring pump and the suction port are located directly above the lowest point of the tank body. The stirring end of the stirring pump penetrates into the tank body and stirs the leachate.

7. A vacuum suction system for leachate from a waste transfer station according to claim 6, characterized in that, The upper side of the enclosure is also equipped with an openable maintenance cover.

8. A vacuum suction system for leachate from a waste transfer station according to claim 6, characterized in that, The housing has a built-in liquid level sensor, and the signal output terminal of the liquid level sensor is linked to the control system of the stirring pump.

9. A vacuum suction system for leachate from a waste transfer station according to claim 1, characterized in that, The filter tank is equipped with a two-stage filter screen and a pneumatic valve at the bottom. A filter residue screw conveyor is located below the pneumatic valve to convey the filter residue to the compressor hopper.

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