Landfill leachate guide and drainage device and control system thereof
By introducing a cleaning agent and exhaust gas treatment system into the leachate conduction and discharge system in the landfill leachate and combined with the use of the air compression system, the problem of conduction and discharge resistance caused by dirt accumulation in the landfill leachate conduction and discharge system is solved, and efficient discharge of leachate and effective cleaning of exhaust gas is achieved.
Patent Information
- Application Number
- CN202421673927.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-15
AI Technical Summary
The existing landfill leachate conducting and discharge system is prone to accumulate dirt during long-term use, increasing the conduction and discharge resistance, resulting in the accumulation of leachate, affecting the stability and safety of the landfill.
A landfill leachate drainage device is designed, including a lifting pipe, a cleaning agent storage tank, a exhaust gas treatment system and an air compression system. It is dissolved by reacting and dirt with the cleaning agent, and is cleaned and unblocked using the exhaust gas treatment system and an air compression system.
It effectively improves the leachate discharge effect, reduces dirt accumulation, avoids leachate accumulation, ensures the stability and safety of the landfill, and reduces the cost of exhaust gas cleaning.
Smart Images
Figure CN222944173U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hazardous waste landfill treatment, in particular to a landfill leachate drainage device and a control system thereof. Background Art
[0002] At present, the common methods for treating solid hazardous waste at home and abroad are incineration and landfill. Incineration will inevitably produce unusable waste and residues, which will eventually have to be treated in the landfill stage. Therefore, landfill can be called the final disposal method for hazardous waste. In the landfill process, because the landfilled hazardous waste often has a certain moisture content, this part of water will slowly seep out to form leachate as the landfill time increases, the landfill height increases, and the waste is squeezed together. Therefore, the landfill needs to set up a suitable leachate collection and drainage system to drain this part of the leachate to avoid water accumulation in the landfill, which will cause the pile to become unstable, affect the production and operation of the landfill, and even cause safety accidents.
[0003] At present, the leachate drainage system usually sets up a leachate drainage layer at the bottom of the landfill during the construction of the landfill, collects the leachate generated by the entire landfill and converges it into the pump pit, and finally drains it out through the pump. However, for hazardous waste landfills, due to the different types and characteristics of different hazardous wastes, the properties of the leachate vary greatly. The drainage layer is prone to accumulate dirt and slowly gathers into the pump pit during the long-term drainage of leachate, increasing the resistance of the leachate drainage. This makes it impossible for the leachate formed by the landfilled waste to penetrate smoothly and gather into the drainage layer pump pit, and then be discharged from the landfill through the leachate drainage pump; in severe cases, the leachate will accumulate at the bottom of the landfill, causing the moisture content of part of the pile to be too high, resulting in the pile becoming unstable, affecting production operations, and even causing safety accidents; and because the landfill drainage layer is usually located below the waste pile, it is far away from the ground, and there is only one lifting pipe in the middle for the leachate drainage pump to enter and exit, which is not conducive to the entry and exit of equipment or personnel, making it difficult to dredge the drainage layer by conventional means.
[0004] Therefore, a landfill leachate drainage device and a control system thereof came into being. Utility Model Content
[0005] The utility model provides a landfill leachate drainage device and a control system thereof, which mainly solves the problem that the existing landfill leachate is retained in the leachate drainage layer and discharged through a pump, but dirt is easily retained after long-term use, which increases the resistance of the leachate drainage and further causes the leachate to accumulate at the bottom of the landfill.
[0006] The utility model proposes a landfill leachate drainage device, comprising:
[0007] A riser, one end of which extends into the landfill and is connected to the leachate drainage layer of the landfill; the other end of the riser is open;
[0008] A cleaning agent storage tank, the cleaning agent storage tank being connected to the first interface on the lifting pipe;
[0009] An exhaust gas treatment system is connected to a second interface on the riser, and a horizontal plane where the second interface is located is higher than a horizontal plane where the first interface is located.
[0010] Preferably, it also includes:
[0011] An end cap, the end cap being detachably arranged on the other end of the extraction tube;
[0012] An air compression system is connected to the third interface on the lifting pipe.
[0013] Preferably, it also includes:
[0014] A lifting pump is connected to the other end of the lifting pipe.
[0015] Preferably, the tail gas treatment system comprises:
[0016] An alkali washing tower, wherein the input port of the alkali washing tower is connected to the second interface of the riser;
[0017] An adsorption tower, wherein the input port of the adsorption tower is connected to the output port of the alkali washing tower, and the output port of the adsorption tower is an exhaust port.
[0018] Preferably, the inlet of the alkali washing tower is arranged at the bottom of the alkali washing tower, and the outlet is arranged at the top of the alkali washing tower;
[0019] The inlet of the adsorption tower is arranged at the bottom of the adsorption tower, and the exhaust port is arranged at the top of the adsorption tower.
[0020] Preferably, it also includes:
[0021] A delivery pump is connected between the discharge port of the cleaning agent storage tank and the first interface of the lifting pipe.
[0022] Preferably, the air compression system comprises:
[0023] An air compressor, wherein the output end of the air compressor is connected to the third interface on the lifting pipe, and the horizontal plane where the third interface is located is located between the horizontal planes where the first interface and the second interface are located.
[0024] Preferably, it also includes:
[0025] A pressure sensor is connected to the fourth interface of the lifting pipe, and the horizontal plane where the fourth interface is located is located between the first interface and the third interface.
[0026] Preferably, it also includes:
[0027] A control valve, wherein there are multiple control valves, and the control valves are respectively arranged on the delivery pipelines of the first interface, the second interface, the third interface and the fourth interface on the lifting pipe.
[0028] The utility model also proposes a landfill leachate drainage device control system, which comprises a controller, and a control valve, an air compressor, a pressure sensor, a delivery pump and a lifting pump which are electrically connected to the controller respectively.
[0029] As can be seen from the above, the application of the technical solution provided by the utility model can achieve the following beneficial effects:
[0030] First, the leachate drainage device proposed by the utility model uses the cleaning liquid to react and dissolve the dirt, thereby ensuring the smooth movement of the liquid in the lifting pipe, thereby effectively improving the drainage effect of the leachate drainage device on the leachate, and at the same time, the exhaust gas is adsorbed by the exhaust gas treatment system to avoid harmful gases from polluting the atmospheric environment;
[0031] Secondly, the drainage device proposed in the utility model is also provided with an air compression system, which can make the cleaning agent move in the lifting pipe through pressure increase and pressure reduction operations to flush the lifting pipe, further improving the cleaning agent's dissolving effect on the dirt in the lifting pipe;
[0032] Thirdly, the exhaust device proposed in the utility model realizes gas cleaning through the alkali washing tower and the adsorption tower. The operation process is relatively simple, and the alkali washing tower and the adsorption tower can be reused many times, which reduces the cost of tail gas cleaning and ensures the effect of tail gas cleaning.
[0033] Fourthly, the control system proposed in the utility model can realize the opening and closing control of the control valve through the controller, thereby realizing effective control of the processes such as cleaning agent delivery and pressure regulation in the pipeline, thereby ensuring the staff's clean control over the leachate drainage device.
[0034] manual BRIEF DESCRIPTION OF THE DRAWINGS
[0035] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0036] Figure 1 This is a schematic diagram of the structure of the drainage device in Example 1 of the utility model;
[0037] Figure 2 This is a schematic diagram of the structure of the landfill in Example 1 of the utility model. DETAILED DESCRIPTION
[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0039] The existing landfill leachate is retained in the leachate drainage layer and discharged through a pump, but it is easy to retain dirt after long-term use, which increases the resistance of the leachate drainage and leads to the problem of leachate accumulation at the bottom of the landfill.
[0040] Example 1
[0041] like Figure 1 and Figure 2 As shown, in order to solve the above problems, this embodiment proposes a landfill leachate drainage device, including a lifting pipe 10, a cleaning agent storage tank 20 and an exhaust gas treatment system; wherein, one end of the lifting pipe 10 extends into the landfill and is connected to the leachate drainage layer of the landfill; the other end of the lifting pipe 10 is open; the cleaning agent storage tank 20 is connected to the first interface on the lifting pipe 10; the exhaust gas treatment system is connected to the second interface on the lifting pipe 10, and the horizontal plane where the second interface is located is higher than the horizontal plane where the first interface is located.
[0042] Preferably, in this embodiment, one end of the lifting pipe 10 should extend into the leachate drainage layer at the bottom of the landfill, and the other end should be inclined upward or vertically away from the landfill, and the first interface and the second interface of the lifting pipe 10 should be distributed on the part of the lifting pipe 10 leaving the landfill.
[0043] In this embodiment, the dirt in the lifting pipe 10 is dissolved by reacting with the cleaning agent, and the exhaust gas generated after the dissolution is discharged through the exhaust gas treatment system. Under the premise of ensuring that the lifting pipe 10 remains smooth during long-term use, the pollution of the environment by the exhaust gas is further avoided.
[0044] More specifically, it also includes an end cover 11 detachably arranged at the other end of the lifting pipe 10 , and an air compression system connected to the third interface of the lifting pipe 10 .
[0045] Preferably, the air compression system in this embodiment includes an air compressor 30. Preferably, but not limited to, a pneumatic control valve V2 and a manual valve V5 are further provided between the output end of the air compressor 30 and the third interface of the lifting pipe 10.
[0046] Preferably but not limited to, in this embodiment, the horizontal plane where the third interface is located is located between the first interface and the second interface.
[0047] In this embodiment, the air compressor 30 can change the pressure difference between the inside of the lift pipe 10 and the atmospheric pressure by compressing the air and delivering the compressed air into the lift pipe 10, thereby controlling the cleaning agent to flush back and forth in the lift pipe 10 and enhancing the mixing reaction of the remaining dirt.
[0048] More specifically, it also includes a lifting pump connected to the other end of the lifting pipe 10.
[0049] In this embodiment, the lift pump can be used to pump out the leachate from the leachate drainage layer along the lift pipe 10 , and can also pump out the cleaning agent along the lift pipe 10 .
[0050] More specifically, the tail gas treatment system includes an alkali washing tower 41 and an adsorption tower 42; the input port of the alkali washing tower 41 is connected to the second interface of the riser 10, the input port of the adsorption tower 42 is connected to the output port of the alkali washing tower 41, and the output port of the adsorption tower 42 is an exhaust port.
[0051] Preferably, the input port of the alkali washing tower 41 is arranged at the bottom, and the output port is arranged at the top; the input port of the adsorption tower 42 is arranged at the bottom, and the exhaust port is arranged at the top of the adsorption tower 42.
[0052] Preferably, in this embodiment, a pneumatic control valve V1 and a manual valve V4 are further provided between the alkali washing tower 41 and the second interface of the lifting pipe 10 .
[0053] In this embodiment, the manual valve V4 is opened by default, and the opening of the second interface output end can be adjusted by controlling the opening of the pneumatic control valve V1, that is, whether to open the exhaust and pressure relief operations. Among them, the alkali washing tower 41 and the adsorption tower 42 can greatly prevent the leakage of harmful gases.
[0054] More specifically, it also includes a delivery pump 50 connected between the discharge port of the cleaning agent storage tank 20 and the first interface of the lifting pipe 10 .
[0055] Preferably, the output end of the delivery pump 50 is also provided with a pneumatic control valve V3 and a manual valve V7. Preferably, but not limited to, the manual valve V7 is opened by default, and the pneumatic control valve V3 is used to control the opening of the output end of the first interface.
[0056] In this embodiment, the delivery pump 50 is used to deliver the cleaning agent along the current pipeline to the first interface of the lifting pipe 10 , and move along the lifting pipe 10 to achieve a reaction with the dirt in the lifting pipe 10 .
[0057] More specifically, it also includes a pressure sensor 60 connected to the fourth interface of the riser 10 .
[0058] Preferably, the horizontal plane where the fourth interface on the riser 10 is located is located between the horizontal plane where the first interface is located and the horizontal plane where the third interface is located.
[0059] Preferably, a manual valve V6 is also provided at the output end of the pressure sensor 60. Preferably, but not limited to, the manual valve V6 is opened by default.
[0060] In this embodiment, the pressure sensor 60 can be used to determine the current pressure in the riser 10 , and determine whether pressurization or pressure relief is required based on the detection data of the pressure sensor 60 .
[0061] Example 2
[0062] In order to solve the above problems, this embodiment proposes a control system for a landfill leachate drainage device, including a controller, and a control valve, an air compressor 30, a pressure sensor 60, a delivery pump 50 and a lift pump electrically connected to the controller respectively.
[0063] In this embodiment, the controller can remotely or preset the opening of any control valve, or control the start-up of the air compressor 30, or obtain data from the pressure sensor 60, or control the start-up of the delivery pump 50, or the start-up of the lifting pump.
[0064] Preferably, in this embodiment, the multiple control valves should have multiple numbers correspondingly, and the controller can adjust the opening of any or all of the control valves according to the actual situation of the current drainage device to achieve control means.
[0065] The landfill leachate drainage device and control system proposed in the present embodiment 1 and embodiment 2 have the following specific operation procedures: 1) taking out the leachate drainage pump from the leachate lifting pipe 10; 2) sealing the leachate lifting pipe 10 with the end cover 11 and connecting it to the dredging device; 3) opening the pneumatic control valve V1, the manual valve V4, the pneumatic control valve V3, and the manual valve V7, and delivering a certain amount of cleaning agent through the leachate lifting pipe 10 to the pump pit of the leachate drainage layer at the bottom of the landfill to remove the dirt. Contact and react, during which the exhaust gas is collected through the exhaust port and the gas and odor of the leachate generated by the reaction are treated and discharged through the alkali washing tower 41 and the activated carbon adsorption tower 42; 4) After the quantitative cleaning agent is delivered, the delivery pump 50 and the valves pneumatic control valve V3, manual valve V7, and pneumatic control valve V1 are closed, and the pneumatic control valve V2, manual valve V5, and manual valve V6 are opened. The compressed air generated by the air compressor 30 is used to pressurize the pipeline, and the pneumatic control valve V1 is opened to release the pressure after maintaining the pressure for a period of time. Through several pressurization, pressure maintenance, and pressure relief operations, the cleaning agent is flushed back and forth in the drainage layer, strengthening its mixed reaction with the dirt blockage, loosening the dirt structure and converting it into soluble substances, increasing the flux of the drainage layer, and playing a role in dredging; 5) The drainage device and the end cover 11 are removed, and the leachate lifting pump is put back into the pump pit to extract the residual waste liquid from the cleaning, completing a cleaning operation.
[0066] This embodiment 1 and embodiment 2 are provided with a compressed air system, pressure sensor and control, combined with the end cover 11 seal, and utilize the original leachate lifting pipe 10 to achieve long-distance pressure to push the cleaning agent mixed with compressed air to flush the drainage layer, react and dissolve the dirt therein, and solve the problem of poor drainage of the drainage layer of the leachate in the hazardous waste landfill. Through the setting of the tail gas treatment system, the device can treat and discharge the gas produced by the reaction while the cleaning agent is cleaning the reaction, avoid the diffusion of toxic and harmful gases or odors produced by the reaction, improve the safety of the operation and avoid secondary pollution. Finally, by cleaning the blockage of the drainage layer of the waste landfill leachate, the stability of the pile is guaranteed and the landfill operates well.
[0067] The above-described implementation methods do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described implementation methods shall be included in the protection scope of the technical solution.
Claims
1. A landfill leachate drainage device, characterized in that: include: A riser, one end of which extends into the landfill and is connected to the leachate drainage layer of the landfill; the other end of the riser is open; A cleaning agent storage tank, the cleaning agent storage tank being connected to the first interface on the lifting pipe; An exhaust gas treatment system is connected to a second interface on the riser, and a horizontal plane where the second interface is located is higher than a horizontal plane where the first interface is located.
2. A landfill leachate drainage device according to claim 1, characterized in that: Also includes: An end cover, the end cover is detachably arranged on the other end of the riser; An air compression system is connected to the third interface on the lifting pipe.
3. A landfill leachate drainage device according to claim 2, characterized in that: Also includes: A lifting pump is connected to the other end of the lifting pipe.
4. A landfill leachate drainage device according to any one of claims 1 to 3, characterized in that: The tail gas treatment system comprises: An alkali washing tower, wherein the input port of the alkali washing tower is connected to the second interface of the riser; An adsorption tower, wherein the input port of the adsorption tower is connected to the output port of the alkali washing tower, and the output port of the adsorption tower is an exhaust port.
5. A landfill leachate drainage device according to claim 4, characterized in that: The input port of the alkali washing tower is arranged at the bottom of the alkali washing tower, and the output port is arranged at the top of the alkali washing tower; The inlet of the adsorption tower is arranged at the bottom of the adsorption tower, and the exhaust port is arranged at the top of the adsorption tower.
6. A landfill leachate drainage device according to claim 5, characterized in that: Also includes: A delivery pump is connected between the discharge port of the cleaning agent storage tank and the first interface of the lifting pipe.
7. The landfill leachate drainage device according to claim 2, characterized in that: The air compression system comprises: An air compressor, wherein the output end of the air compressor is connected to the third interface on the lifting pipe, and the horizontal plane where the third interface is located is located between the horizontal planes where the first interface and the second interface are located.
8. The landfill leachate drainage device according to claim 7, characterized in that: Also includes: A pressure sensor is connected to the fourth interface of the lifting pipe, and the horizontal plane where the fourth interface is located is located between the first interface and the third interface.
9. A landfill leachate drainage device according to claim 8, characterized in that: Also includes: A control valve, wherein there are multiple control valves, and the control valves are respectively arranged on the delivery pipelines of the first interface, the second interface, the third interface and the fourth interface on the lifting pipe.
10. A landfill leachate drainage device control system, characterized in that: The invention comprises a controller, and a control valve, an air compressor, a pressure sensor, a delivery pump and a lifting pump which are electrically connected to the controller respectively.