Leachate extraction system

Abstract

The utility model relates to the field of mechanical technology, in particular to a leachate extraction system. According to the technical scheme, the device is characterized by comprising a stock solution pool, a water suction pump located in the stock solution pool and a lifting mechanism, the water suction pump is fixedly installed on the lifting mechanism, the water suction pump is arranged far away from sludge at the bottom of the pool to conduct percolate extraction work, and when the liquid level falls below a water inlet of the water suction pump, the lifting mechanism drives the water suction pump to descend so as to continuously suck percolate; in this way, the situation that the water suction pump sucks sludge, and consequently the water suction pump is blocked is effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of garbage disposal, and in particular to a leachate extraction system. Background Art

[0002] Landfill leachate is a kind of high-concentration organic wastewater with complex components. Due to the complex composition of garbage, the leachate produced is a kind of wastewater with complex components. One of the characteristics of its water quality is that it contains a high content of pollutants and often contains biological toxicity. Once the leachate enters the soil from the surface, the degree of pollution can be imagined. Therefore, the harm of pollutants to the environment can be controlled by treating landfill leachate, and it is important to pay attention to the correct treatment of landfill leachate. The first step of leachate pretreatment is to guide the leachate from the raw liquid pool into the next reaction pool.

[0003] At present, in the relevant technology, the leachate extraction system mainly includes a raw liquid pool and a water pump. When the leachate extraction system is working, because the water pump body is relatively bulky, the water pump often sinks to the bottom of the raw liquid pool to extract the leachate and guide the leachate in the raw liquid pool into the next reaction pool. When inspection and maintenance are required, the water pump is pulled out of the raw liquid pool.

[0004] Regarding the above-mentioned related technologies, there is settled sludge at the bottom of the raw liquid pool. When the water pump sinks to the bottom of the pool to work, the sludge will be sucked into the water pump, causing the water pump to be blocked, affecting the normal operation of the water pump. Therefore, the leachate extraction system still has a lot of room for improvement. Utility Model Content

[0005] In order to reduce the risk of a water pump in a leachate extraction system being blocked by silt, the present application provides a leachate extraction system.

[0006] This application provides a technical solution that adopts the following:

[0007] The leachate extraction system includes a raw liquid pool and a water pump located in the raw liquid pool, and also includes a lifting mechanism, which is arranged on the pool wall of the raw liquid pool, and the water pump is arranged on the lifting mechanism, and the lifting mechanism is used to drive the water pump to lift and lower; and a guiding mechanism, which is arranged on the pool wall of the raw liquid pool and is connected to the water pump so that the water pump can be lifted and lowered at the raw liquid pool.

[0008] By adopting the above scheme: when the water pump sinks to the bottom of the raw liquid pool to work, the sludge at the bottom of the pool will be sucked into the water pump, affecting the normal use of the water pump. The water pump needs to be pulled out for cleaning. By setting a lifting mechanism, the height position of the water pump can be adjusted, and the water pump can be kept at the liquid surface to perform extraction work, away from the sludge at the bottom of the pool, effectively reducing the situation where the water pump absorbs sludge and causes the water pump to be blocked. The guide mechanism plays a role in lifting and guiding the water pump, making the water pump not easy to deviate, further reducing the possibility of blockage.

[0009] Preferably, the lifting mechanism includes a motor, a screw and a supporting base, the motor is fixedly arranged on the wall of the raw liquid pool, the screw is fixedly connected to the output shaft of the motor, and the screw is vertically arranged, the supporting base is movably engaged with the screw, and the water pump is fixedly arranged on the supporting base.

[0010] By adopting the above solution: the motor rotates forward or reversely to drive the screw to rotate, thereby driving the supporting base to move up and down in the vertical direction, and at the same time driving the water pump to move up and down, adjusting the position of the water pump in the raw liquid pool, and reducing the situation of pumping sludge at the bottom of the pool.

[0011] Preferably, the guiding mechanism comprises a linear guide rail and a slider, wherein the linear guide rail is vertically fixed on the wall of the raw liquid pool; the slider is slidably arranged on the linear guide rail, and the slider is fixedly connected to the water pump.

[0012] By adopting the above solution: the guide mechanism is connected with the water pump, which plays a guiding role when the water pump performs vertical lifting movement, so that the water pump can be lifted and lowered smoothly in the raw liquid pool.

[0013] Preferably, it also includes a control module, which includes a liquid level sensor and a controller. The liquid level sensor is fixedly arranged in the original liquid pool and is used to detect the liquid level position; the controller has a receiving end and an output end, the receiving end is connected to the liquid level sensor and is used to receive the liquid level sensor signal, and the output end is connected to the motor and is used to control the start and stop of the motor.

[0014] By adopting the above solution: the water pump is set to work at the liquid level. When the liquid level is lower than the water pumping port, the liquid level position no longer changes. The liquid level sensor will send a signal to the controller. After receiving the signal, the controller will send a start and stop signal to the motor to control the water pump to follow the drop of the liquid level, thereby achieving continuous absorption of leachate.

[0015] Preferably, a pool cover is provided on the raw liquid pool, and a circular hole is provided on the pool cover, the circular hole is connected to the air pipe on the fan, and the fan is connected to the exhaust gas treatment equipment through a ventilation duct.

[0016] By adopting the above scheme: the fan is started, the hydrogen sulfide gas between the cover and the raw liquid pool is extracted, and the hydrogen sulfide gas is introduced into the waste gas treatment equipment. The reagents in the waste gas treatment equipment react chemically with hydrogen sulfide and absorb the hydrogen sulfide to achieve the effect of removing hydrogen sulfide.

[0017] Preferably, it also includes a reagent tank, a valve is provided at the mouth of the reagent tank, the reagent tank is placed beside the stock solution pool, and the reagent tank is connected to the stock solution pool through a liquid pipeline.

[0018] By adopting the above scheme: opening the valve, the reagent in the reagent tank can be introduced into the stock solution pool, reacting chemically with the leachate to form a precipitate, so as to achieve the effect of reducing the hardness of the leachate.

[0019] Preferably, the water pump is further provided with a filter screen, and the filter screen is detachably arranged at the water inlet of the water pump.

[0020] By adopting the above solution, some impurities may float in the supernatant. The filter is used to filter the large particles of impurities floating in the leachate. After using it for a period of time, the filter can be removed, rinsed, and installed again for multiple uses.

[0021] Preferably, it also includes a dredging pump, which is fixedly arranged at the bottom of the raw liquid tank and is connected to the sludge tank through a pipeline.

[0022] By adopting the above scheme, the silt removal pump can guide the sludge from the bottom of the pool into another reaction pool, thereby reducing the lifting of the settled sludge, increasing the impurities floating in the leachate, and reducing the impact on the operation of the water pump in the pool.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When the water pump sinks to the bottom of the raw liquid pool to work, the water pump will suck the sludge at the bottom of the raw liquid pool into the water pump, affecting the normal use of the water pump. The water pump must be pulled out for cleaning. By setting a lifting mechanism, the height position of the water pump can be adjusted, and the water pump can be kept at the liquid surface for extraction work, away from the sludge at the bottom of the pool, effectively reducing the situation where the water pump absorbs sludge and causes the water pump to be blocked. The guide mechanism plays a role in lifting and guiding the water pump, making it difficult for the water pump to deviate, further reducing the possibility of blockage.

[0025] 2. The forward or reverse rotation of the motor drives the screw to rotate, thereby driving the supporting base to move up and down in the vertical direction. The supporting base drives the water pump to move up and down, adjusts the position of the water pump in the raw liquid pool, and reduces the situation of pumping sludge at the bottom of the pool.

[0026] 3. The fan is started to extract the hydrogen sulfide gas between the cover and the raw liquid pool, and then introduce the hydrogen sulfide gas into the waste gas treatment equipment. The reagents in the waste gas treatment equipment react chemically with the hydrogen sulfide to absorb the hydrogen sulfide, thereby achieving the effect of removing the hydrogen sulfide. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of a water pump, a lifting mechanism and a guide mechanism in a preferred embodiment of the present application.

[0028] Figure 2 It is an enlarged view of a water pump, a lifting mechanism and a guide mechanism in a preferred embodiment of the present application.

[0029] Figure 3 It is a structural schematic diagram of a liquid level sensor in a preferred embodiment of the present application.

[0030] Figure 4 It is a structural schematic diagram of a fan and a reagent tank in a preferred embodiment of the present application.

[0031] Figure 5 It is a schematic diagram of the structure of the filter screen in a preferred embodiment of the present application.

[0032] Figure 6 It is a structural schematic diagram of a dredging pump in a preferred embodiment of the present application.

[0033] Explanation of the reference numerals: 1. raw liquid tank; 2. water pump; 3. lifting mechanism; 31. motor; 32. screw rod; 33. supporting base; 4. bracket; 5. guide mechanism; 51. slider; 52. linear guide rail; 6. liquid level sensor; 7. tank cover; 8. fan; 9. reagent tank; 91. valve; 10. filter screen; 11. dredging pump. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-6 This application is described in further detail.

[0035] The embodiments of the present application disclose a leachate extraction system.

[0036] Reference Figure 1 Figure 2 The leachate extraction system includes a raw liquid pool 1, a water pump 2, a lifting mechanism 3 and a guide mechanism 5, wherein the lifting mechanism 3 and the guide mechanism 5 are both installed on the pool wall of the raw liquid pool 1, the water pump 2 is fixedly installed on the lifting mechanism 3, the lifting mechanism 3 drives the water pump 2 to rise and fall, and at the same time, the water pump 2 is connected to the guide mechanism 5 so that the water pump 2 is lifted and guided.

[0037] Reference Figure 1 Figure 2In order to stay away from the sludge at the bottom of the pool and reduce the situation where the water pump 2 is sucked up by the sludge and causes the water pump 2 to be blocked, the lifting mechanism 3 includes a motor 31, a screw rod 32 and a supporting base 33; first, a bracket 4 can be fixedly installed on the pool wall, and the motor 31 is installed on the pool wall by being fixedly installed on the bracket 4. At this time, the output shaft of the motor 31 is set vertically downward for outputting power; the screw rod 32 is rotatably installed on the pool wall of the raw liquid pool 1 through the bearing seat, and the screw rod 32 is also set vertically. At the same time, the screw rod 32 is fixed to the output shaft of the motor 31 through the shaft sleeve When the motor 31 is started, the screw rod 32 rotates with the motor 31; in addition, a through hole cooperating with the screw rod 32 is provided on the supporting base 33, and the through hole has an internal thread engaged with the screw rod 32, and the internal thread vertically penetrates the upper and lower sides of the supporting base 33. The water pump 2 includes a pump body and a mounting seat, the pump body is fixedly mounted on the mounting seat, and the mounting seat is fixedly mounted on the supporting base 33. At the same time, the supporting base 33 is connected to the guide mechanism 5, and the guide mechanism 5 is used to guide the lifting and lowering of the supporting base 33, thereby guiding the lifting and lowering of the water pump 2.

[0038] Here, when the motor 31 drives the screw rod 32 to rotate forward or reverse, the supporting base 33 engaged with the screw rod 32 moves back and forth vertically; when the supporting base 33 moves up and down, the water pump 2 also moves with the supporting base 33, and the water pump 2 moves away from the silt at the bottom of the pool, effectively reducing the situation where the water pump 2 absorbs the silt at the bottom of the pool, causing the water pump 2 to be blocked and unable to work normally.

[0039] In order to prevent the water pump 2 from deviating during vertical movement, the guide mechanism 5 specifically includes a linear guide rail 52 and a slider 51, wherein the linear guide rail 52 is vertically arranged, fixedly connected to the bracket 4, and fixedly mounted on the wall of the raw liquid pool 1 through the bracket 4; the slider 51 is slidably mounted on the linear guide rail 52, and the slider 51 is integrally connected to the supporting base 33, with a stable structure, which limits the supporting base 33 from rotating with the screw rod 32, thereby limiting the water pump 2 from rotating with the screw rod 32, and the guide mechanism 5 plays a guiding role in the lifting and lowering of the water pump 2.

[0040] Setting the pump 2 away from the sludge at the bottom of the pool effectively reduces the possibility of the pump 2 extracting sludge. As the pumping action continues, the leachate level will continue to decrease. However, when the leachate level is lower than the water inlet of the pump 2, the pump 2 will not be able to continue to extract the leachate, and lack of working continuity.

[0041] refer to Figure 3 Based on this, in order to adapt the suction height of the water pump 2 to the liquid level height, a control module is also provided. Specifically, the control module mainly includes a liquid level sensor 6 and a controller. The liquid level sensor 6 is fixedly mounted on the bracket 4 and extends to the bottom of the pool to detect the height position of the liquid level through the pressure difference.

[0042] At the same time, the controller can select a control element such as PLC. The controller has a receiving end and an output end, wherein the receiving end of the controller is electrically connected to the liquid level sensor 6 for receiving the signal of the liquid level sensor 6. The liquid level sensor 6 can send a liquid level sensor 6 signal. The controller detects the signal of the liquid level sensor 6 and sets the highest point that the lifting mechanism 3 can rise to as the initial position.

[0043] The output end of the controller is electrically connected to the motor 31, and the receiving end of the controller continuously receives the liquid level sensor signal from the liquid level sensor 6 and analyzes it. When the water pump 2 works normally, the water pump 2 is located at the initial position to perform extraction work. During this process, the leachate in the pool may gradually decrease, and the parameters of the liquid level sensor 6 also continue to change. When the water inlet of the water pump 2 is lower than the liquid level, the water pump 2 runs idle, and very little leachate can enter the water pump 2 from the water inlet, and the parameters of the liquid level sensor 6 remain unchanged. At this time, when the controller detects that the parameters of the liquid level sensor 6 remain unchanged, it generates a control signal and then sends it to the motor 31 to control the start and stop of the motor 31 and control the lowering of the lifting mechanism 3 so that the water inlet of the water pump 2 is always lower than the liquid level position, and leachate can always be extracted, thereby ensuring the continuity of the extraction work.

[0044] In addition, the controller can also set a detection threshold for the minimum water level to prevent the lifting mechanism 3 from continuing to descend and extracting sludge from the bottom of the pool. When the controller detects that the liquid level sensor signal emitted by the liquid level sensor 6 is less than the threshold, the controller generates a reset signal and sends it to the motor 31 to control the start and stop of the motor 31, so that the water pump 2 returns to the aforementioned initial position, waiting for the introduction of the leachate concentrate, and then performs the extraction work.

[0045] Leachate is a high-concentration organic wastewater with complex components. During the treatment process, hydrogen sulfide gas will be produced. When hydrogen sulfide overflows into the air, it will cause secondary pollution. Hydrogen sulfide is a flammable and explosive gas with high toxicity, which poses a great threat to on-site construction safety and the health of personnel.

[0046] refer to Figure 4 Based on this, a pool cover 7 is also provided on the stock liquid pool 1. The cover edge of the pool cover 7 is larger than the pool opening of the stock liquid pool 1. The pool cover 7 covers the top opening of the stock liquid pool 1, which plays a role in reducing the overflow of hydrogen sulfide gas. In addition, hydrogen sulfide gas needs to be centrally treated. Specifically, a round hole is also provided on the pool cover 7. A fan 8 is also provided outside the stock liquid pool 1. The air inlet of the fan 8 is sealed with an air pipe. The air pipe passes through the round hole and extends above the leachate in the pool to facilitate the collection of hydrogen sulfide gas. The air outlet of the fan 8 is connected to the waste gas treatment equipment through a ventilation duct. The waste gas treatment equipment has a sodium hydroxide reagent. When the fan 8 is started, the hydrogen sulfide gas is sucked in from the air inlet of the fan 8 and blown out from the air outlet of the fan 8. It is centrally treated in the waste gas treatment equipment, which has achieved the effect of removing hydrogen sulfide.

[0047] At the same time, the water quality composition of the leachate is very complex and usually contains a variety of metal ions. If most of the metal ions cannot be removed in advance, it will increase the difficulty of the subsequent treatment process of the leachate.

[0048] refer to Figure 4 Based on this, a reagent tank 9 is provided next to the stock liquid pool 1. The mouth of the reagent tank 9 is sealed with a liquid pipeline, and a valve 91 is provided on the liquid pipeline. The reagent tank 9 is filled with sodium hydroxide liquid reagent. When in use, the valve 91 is opened, and the amount of the reagent discharged is adjusted according to the demand for sodium hydroxide reagent. The liquid pipeline at the mouth of the reagent tank 9 extends from the circular hole on the pool cover 7 into the leachate in the stock liquid pool 1. The reagent reacts with the leachate to produce precipitation, and the metal ions are removed from the leachate in advance, thereby reducing the hardness of the leachate to prevent precipitation in subsequent reactions and blockage of the equipment.

[0049] There may be some impurities or garbage floating in the supernatant in the leachate. After the water pump 2 has been working for a long time, the impurities will be clogged in the water pump 2, affecting the extraction work.

[0050] refer to Figure 5 In order to prevent the water pump 2 from being clogged by impurities floating in the leachate, a filter screen 10 is provided at the water inlet of the water pump 2. A buckle is provided at the edge of the filter screen 10. The filter screen 10 can be detachably installed at the water inlet of the water pump 2 through the buckle. After using it for a period of time, the filter screen 10 can be removed, cleaned and then installed back at the water inlet for reuse.

[0051] After long-term use, a large amount of sludge will accumulate at the bottom of the raw liquid pool 1, affecting the extraction of leachate. The sludge at the bottom of the pool also needs to be extracted and centrally processed. If the sludge at the bottom of the pool is lifted up, the impurities floating in the leachate will increase, affecting the operation of the water pump 2 in the pool.

[0052] refer to Figure 6 Based on this, in order to reduce the impact of sludge extraction on supernatant extraction, a drain outlet is provided at the bottom of the stock liquid pool 1, and a dredging pump 11 is also provided outside the stock liquid pool 1. The water inlet of the dredging pump 11 is connected to the dredging pipeline, and the dredging pipeline is connected to the bottom of the stock liquid pool 1 through the drain outlet at the bottom of the pool. When the dredging pump 11 is working, the sludge at the bottom of the pool is sucked into the dredging pump 11 through the dredging pipeline. The water outlet of the dredging pump 11 is connected to a reaction pool. The sludge is guided into the reaction pool and extracted from the bottom of the pool, away from the upper supernatant, and has less impact on the supernatant.

[0053] The implementation principle of the leachate extraction system of the embodiment of the present application is: the staff turns on the water pump 2 to absorb the supernatant. When the liquid level drops and is lower than the water inlet of the water pump 2, the parameters of the liquid level sensor 6 remain unchanged. At this time, the controller controls the motor 31 to start, so that the lifting mechanism 3 drops, so that the water pump can continue to absorb the supernatant; when the parameters of the liquid level sensor 6 are less than the threshold value of the controller, the controller controls the lifting mechanism 3 to reset, and the water pump waits for the leachate to be introduced and continues the absorption work.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A leachate extraction system, comprising a raw liquid pool (1) and a pump (2) located in the raw liquid pool (1), characterized in that: Also includes A lifting mechanism (3) is arranged on the wall of the raw liquid pool (1), and a water pump (2) is arranged on the lifting mechanism (3). The lifting mechanism (3) is used to drive the water pump (2) to move up and down; and a guide mechanism (5) which is arranged on the wall of the raw liquid pool (1) and connected to the water pump (2) so that the water pump (2) can be raised and lowered in the raw liquid pool (1).

2. The leachate extraction system according to claim 1, characterized in that: The lifting mechanism (3) comprises a motor (31), a screw rod (32) and a supporting base (33); the motor (31) is fixedly arranged on the wall of the raw liquid pool (1); the screw rod (32) is fixedly connected to the output shaft of the motor (31); and the screw rod (32) is vertically arranged; the supporting base (33) is meshed with the screw rod (32); and the water pump (2) is fixedly arranged on the supporting base (33).

3. The leachate extraction system according to claim 1, characterized in that: The guide mechanism (5) comprises a linear guide rail (52) and a slider (51); the linear guide rail (52) is vertically fixedly arranged on the wall of the raw liquid pool (1); the slider (51) is slidably arranged on the linear guide rail (52), and the slider (51) is fixedly connected to the water pump (2).

4. The leachate extraction system according to claim 2, characterized in that: The invention also comprises a control module, wherein the control module comprises a liquid level sensor (6) and a controller, wherein the liquid level sensor (6) is fixedly arranged in the raw liquid pool (1) and is used to detect the liquid level position; the controller comprises a receiving end and an output end, wherein the receiving end is connected to the liquid level sensor (6) and is used to receive a signal from the liquid level sensor (6), and the output end is connected to the motor (31) and is used to control the start and stop of the motor (31).

5. The leachate extraction system according to claim 1, characterized in that: The raw liquid pool (1) is provided with a pool cover (7), and the pool cover (7) is provided with a circular hole, the circular hole is connected to the air pipe on the fan (8), and the fan (8) is connected to the exhaust gas treatment equipment through a ventilation duct.

6. The leachate extraction system according to claim 1, characterized in that: It also comprises a reagent tank (9), wherein a valve (91) is provided at the mouth of the reagent tank (9), the reagent tank (9) is placed beside the stock liquid pool (1), the reagent tank (9) is connected to a liquid pipeline, and the liquid pipeline passes through a circular hole on the pool cover (7) to communicate with the stock liquid pool (1).

7. The leachate extraction system according to claim 1, characterized in that: The water pump (2) is also provided with a filter screen (10), and the filter screen (10) is detachably arranged at the water inlet of the water pump (2).

8. The leachate extraction system according to claim 7, characterized in that: It also comprises a silt removal pump (11), which is fixedly arranged at the bottom of the raw liquid pool (1), and the silt removal pump (11) is connected to the sludge pool through a pipeline.

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