In-situ remediation system for refuse landfill

Abstract

The utility model relates to an in-situ remediation system for a refuse landfill, which belongs to the technical field of refuse landfill remediation and comprises a covering layer, a refuse layer is arranged at the bottom of the covering layer, a discharge layer is arranged at the bottom of the refuse layer, and a remediation component for in-situ remediation is mounted on the outer side of the covering layer. A nutrition component for supplementing nutrition is mounted at the top of the covering layer; the nutrition assembly comprises two conveying pipes which penetrate through and are fixedly connected to the top of the covering layer, a liquid discharging pipe fixed between the bottom ends of the two conveying pipes, a sampling pipe which penetrates through and is fixed to the top of the covering layer, a screen pipe fixed to the bottom end of the sampling pipe, and a sampling air pump fixedly installed at the top of the covering layer. According to the in-situ remediation system for the refuse landfill, nutrition can be properly added to microorganisms in the early stage of construction, meanwhile, air can be conveniently extracted, the content and activity of the microorganisms in the system can be detected, and the time needed for achieving the stable degradation state of the refuse is greatly shortened.

Description

Technical Field

[0001] The present application relates to the technical field of landfill remediation, and in particular to an in-situ remediation system for a landfill. Background Art

[0002] A landfill is a centralized garbage storage site that uses sanitary landfilling. Sanitary landfills are widely used in China due to their low cost and good hygiene. Landfills generally use layered soil covering to treat garbage, piling up a layer of garbage and then covering it with a layer of loess. This can easily reduce garbage pollution. In-situ remediation technology is one of the solutions to repair and manage old landfills.

[0003] According to the landfill in-situ remediation system disclosed in Chinese patent publication number CN214184529U, the patent utilizes an air guide system in conjunction with leachate circulation and re-injection to enable microorganisms to react and decompose, thereby achieving the function of rapidly degrading landfill waste. This is very practical, but in actual use, the patent still has room for improvement. The patent only meets the environmental factors for microbial reproduction. In the early stages of microbial development, the appropriate addition of nutrients can accelerate the reproduction of microorganisms, thereby achieving a stable state of stable waste degradation more quickly. In this regard, the present application proposes an in-situ remediation system for landfills to solve the above problems. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the present application provides an in-situ remediation system for landfills, which has the advantages of being able to appropriately add nutrients to microorganisms in the early stages of construction while also being able to conveniently extract air to detect the internal microbial content and activity. This solves the shortcomings of existing in-situ remediation systems for landfills that can only ensure environmental factors for microbial reproduction in the early stages of construction but cannot appropriately add nutrients.

[0005] To achieve the above objectives, the present application provides the following technical solutions: a landfill in-situ remediation system, comprising a covering layer, a garbage layer disposed at the bottom of the covering layer, a drainage layer disposed at the bottom of the garbage layer, a remediation component for in-situ remediation mounted on the outer side of the covering layer, and a nutrition component for supplementing nutrition mounted on the top of the covering layer;

[0006] The nutrition component includes two delivery pipes passed through and fixedly connected to the top of the covering layer, a drainage pipe fixed between the bottom ends of the two delivery pipes, a sampling tube passed through and fixed on the top of the covering layer, a screen tube fixed to the bottom end of the sampling tube, a sampling air pump fixedly installed on the top of the covering layer, an exhaust pipe fixed to the exhaust end of the sampling air pump, a bellows fixed to the end of the exhaust pipe, an air guide head fixed to the end of the bellows, a rubber ring bonded to the outside of the air guide head and evenly distributed, a fixed tube that can be inserted by the air guide head, a control valve fixedly installed on the outside of the fixed tube, a pressure gauge fixedly installed on the outside of the fixed tube, and a storage tank fixed to the end of the fixed tube.

[0007] By adopting the above technical solution, it is possible to add appropriate nutrients to the microorganisms in the early stage of construction, and at the same time, it is convenient to extract air to detect the internal microbial content and activity, thereby greatly shortening the time required to reach a stable state of garbage degradation, improving work efficiency, and facilitating the effective degradation of garbage in a shorter time.

[0008] Furthermore, the repair component includes a recovery box fixedly installed on the left side of the discharge layer, a water quality detector fixedly installed on the outside of the recovery box, a return pipe fixedly installed on the left side of the recovery box, a discharge water pump fixedly installed on the outside of the return pipe, a direct current pipe fixed to the bottom of the return pipe, a main air pipe passing through the top of the covering layer, an air pump fixedly installed on the top of the covering layer, two extension pipes connected to the end of the air pump through a three-way valve, and a secondary air pipe fixed to the bottom end of the extension pipe.

[0009] By adopting the above technical solution, the landfill can be effectively repaired through the repair component.

[0010] Furthermore, a water pipe is fixedly connected between the discharge layer and the recovery box, the discharge layer is tilted toward the side close to the water pipe, and the sensor of the water quality detector passes through the left side of the recovery box.

[0011] By adopting the above technical solution, the liquid discharged from the discharge layer can enter the interior of the recovery box through the water pipe.

[0012] Furthermore, the return pipe extends to the top of the covering layer at one end away from the recycling box, the direct current pipe is arranged inside the garbage layer, and the two direct current pipes are symmetrically distributed on the left and right, and the part of the outer side of the direct current pipe located inside the garbage layer is provided with evenly distributed through holes.

[0013] By adopting the above technical solution, the leachate inside the recycling box can flow into the interior of the garbage layer through the return pipe and the direct flow pipe.

[0014] Furthermore, the bottom end of the main air pipe passes through the covering layer and the garbage layer in sequence and is fixedly connected to the top of the discharge layer. The outer side of the main air pipe is provided with evenly distributed air guide holes.

[0015] By adopting the above technical solution, the main air pipe can communicate with the outside air of the garbage layer through the air guide holes.

[0016] Furthermore, the auxiliary air duct is opened at one end close to the vacuum pump, and an electric valve is provided at the opening. The auxiliary air duct is tilted, and the two auxiliary air ducts are symmetrically distributed on the left and right. The outer side of the auxiliary air duct is provided with evenly distributed circular holes on the part inside the garbage layer.

[0017] By adopting the above technical solution, the auxiliary air duct can be connected to the outside air through the circular hole and the open end, thereby playing a role in assisting air intake. The electric valve can be used to close the auxiliary air duct when it is necessary.

[0018] Furthermore, the sieve tube is a tubular body with evenly distributed sieve holes on the outside, and the air inlet end of the sampling air pump is fixedly connected to the end of the sampling tube.

[0019] By adopting the above technical solution, the garbage can be blocked, so that gas can enter, and the sampling air pump can perform sampling through the sampling tube and the screen tube.

[0020] Furthermore, the inner side of the fixed tube can be used for plugging in the air guide head, and the storage tank consists of a tank body and a cover, and is a stainless steel pressure tank.

[0021] By adopting the above technical solution, the gas guide head can be inserted into the inner side of the fixed tube and sealed by the rubber ring. It can be used for gas sampling. Before sampling, the air inside the storage tank can be extracted to make the interior in a relative vacuum state, allowing the sample gas to enter more easily.

[0022] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0023] The landfill in-situ remediation system, through the coordinated use of the cover layer, garbage layer, discharge layer, remediation components and nutrient components, can appropriately add nutrients to microorganisms in the early stages of construction, while also conveniently extracting air to detect the internal microbial content and activity, thereby greatly shortening the time required to reach a stable state of garbage degradation, improving work efficiency, and facilitating the effective degradation of garbage in a shorter time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of this application;

[0025] Figure 2 For this application structure Figure 1 A partial enlarged schematic diagram of the middle part A;

[0026] Figure 3 For this application structure Figure 1 Schematic diagram of the middle screen pipe connection structure.

[0027] In the figure: 1. Covering layer; 2. Garbage layer; 3. Discharge layer; 400. Repair component; 401. Recycling box; 402. Water quality detector; 403. Return pipe; 404. Discharge water pump; 405. Direct current pipe; 406. Main air pipe; 407. Suction pump; 408. Extension pipe; 409. Secondary air pipe; 500. Nutrition component; 501. Delivery pipe; 502. Drain pipe; 503. Sampling tube; 504. Screen tube; 505. Sampling air pump; 506. Exhaust pipe; 507. Bellows; 508. Air guide head; 509. Rubber ring; 510. Fixing pipe; 511. Control valve; 512. Pressure gauge; 513. Storage tank. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0029] See also Figure 1-3 The present application provides a technical solution: a landfill in-situ remediation system, comprising a covering layer 1, a garbage layer 2 is provided at the bottom of the covering layer 1, a drainage layer 3 is provided at the bottom of the garbage layer 2, a repair component 400 for in-situ remediation is installed on the outside of the covering layer 1, and a nutrition component 500 for supplementing nutrition is installed on the top of the covering layer 1; through the coordinated use of the covering layer 1, the garbage layer 2, the drainage layer 3, the repair component 400 and the nutrition component 500, it is possible to appropriately add nutrition to the microorganisms in the early stage of construction, and it is also possible to conveniently extract air to detect the internal microbial content and activity, thereby greatly shortening the time required to reach a stable garbage degradation state, improving work efficiency, and facilitating the effective degradation of garbage in a shorter time.

[0030] In this embodiment, the nutrient assembly 500 is a structure used to provide additional nutrients to microorganisms in the initial stage of construction to accelerate their reproduction.

[0031] like Figure 1 、 Figure 2 and Figure 3As shown, the nutrition component 500 includes two delivery pipes 501 that are passed through and fixedly connected to the top of the covering layer 1, a drainage pipe 502 fixed between the bottom ends of the two delivery pipes 501, a sampling pipe 503 that is passed through and fixed to the top of the covering layer 1, a screen pipe 504 fixed to the bottom end of the sampling pipe 503, a sampling air pump 505 fixedly installed on the top of the covering layer 1, an exhaust pipe 506 fixed to the exhaust end of the sampling air pump 505, a bellows 507 fixed to the end of the exhaust pipe 506, an air guide head 508 fixed to the end of the bellows 507, rubber rings 509 bonded to the outside of the air guide head 508 and evenly distributed, a fixed pipe 510 that can be plugged into the air guide head 508, a control valve 511 fixedly installed on the outside of the fixed pipe 510, a pressure gauge 512 fixedly installed on the outside of the fixed pipe 510, and a storage tank 513 fixed to the end of the fixed pipe 510.

[0032] It should be noted that there are evenly distributed drainage holes at the bottom of the drainage pipe 502, which can drain the nutrient solution. The screen tube 504 is a tubular body with evenly distributed sieve holes on the outside, which can block garbage and allow gas to enter. The air inlet end of the sampling air pump 505 is fixedly connected to the end of the sampling tube 503, so that the sampling air pump 505 can perform sampling through the sampling tube 503 and the screen tube 504.

[0033] In addition, the inner side of the fixed tube 510 can be used for plugging the gas guide head 508, so that the gas guide head 508 can be plugged into the inner side of the fixed tube 510 and sealed by the rubber ring 509. The storage tank 513 consists of a tank body and a lid, and is a stainless steel pressure tank that can be used for gas sampling. Before sampling, the air inside the storage tank 513 can be extracted to make the interior in a relatively vacuum state, allowing the sample gas to enter more easily. Under the monitoring of the pressure gauge 512, the operator can conveniently observe the current pressure state inside the storage tank 513.

[0034] In this embodiment, the repair assembly 400 is used to repair the structure of a landfill.

[0035] like Figure 1 As shown, the repair component 400 includes a recovery box 401 fixedly installed on the left side of the discharge layer 3, a water quality detector 402 fixedly installed on the outside of the recovery box 401, a return pipe 403 fixedly installed on the left side of the recovery box 401, a discharge water pump 404 fixedly installed on the outside of the return pipe 403, a direct current pipe 405 fixed at the bottom of the return pipe 403, a main air pipe 406 passing through the top of the covering layer 1, an air pump 407 fixedly installed on the top of the covering layer 1, two extension pipes 408 connected to the end of the air pump 407 through a three-way valve, and a secondary air pipe 409 fixed at the bottom of the extension pipe 408.

[0036] It should be noted that a water pipe is fixedly connected between the discharge layer 3 and the recycling box 401. The discharge layer 3 is tilted toward the side close to the water pipe. The sensor of the water quality detector 402 passes through the left side of the recycling box 401, so that the liquid discharged by the discharge layer 3 can enter the interior of the recycling box 401 through the water pipe. Among them, the discharge layer 3 is a gravel layer, which can filter the liquid seeping from the garbage.

[0037] In addition, the end of the return pipe 403 away from the recycling box 401 extends to the top of the covering layer 1, and the direct current pipe 405 is arranged inside the garbage layer 2, and the two direct current pipes 405 are symmetrically distributed on the left and right. The part of the outer side of the direct current pipe 405 located inside the garbage layer 2 is provided with evenly distributed through holes, so that the leachate inside the recycling box 401 can flow to the inside of the garbage layer 2 through the return pipe 403 and the direct current pipe 405.

[0038] At the same time, the bottom end of the main air pipe 406 passes through the covering layer 1 and the garbage layer 2 in sequence and is fixedly connected to the top of the discharge layer 3. The outside of the main air pipe 406 is provided with evenly distributed air guide holes, so that the main air pipe 406 can connect the interior of the garbage layer 2 with the outside air through the air guide holes. Among them, the interior of the main air pipe 406 is provided with a gas sensor that can monitor the concentration of oxygen and carbon dioxide, which is convenient for monitoring the environment.

[0039] In addition, the end of the auxiliary air duct 409 close to the vacuum pump 407 is open, and an electric valve is provided at the opening. The auxiliary air duct 409 is tilted, and the two auxiliary air ducts 409 are symmetrically distributed on the left and right. The outer side of the auxiliary air duct 409 is located inside the garbage layer 2 and is provided with evenly distributed circular holes, so that the auxiliary air duct 409 can be connected to the outside air through the circular holes and the end with the opening, playing a role of auxiliary air intake. The electric valve can play a closing role when the auxiliary air duct 409 needs to be closed.

[0040] The working principle of the above embodiment is:

[0041] During in-situ remediation, air enters the interior of the garbage layer 2 through the top of the main air pipe 406, and relies on its own oxygen supply capacity and the reaction of various microorganisms inside the garbage to generate heat. The required nutrient solution is discharged into the interior of the garbage layer 2 through the delivery pipe 501 and the drainage pipe 502, so that the microorganisms can reproduce efficiently in the early stage, making the reaction proceed more quickly. The temperature difference between the inside and outside generated by the reaction heat is used to introduce the outside air from the secondary air pipe 409 into the interior of the garbage layer 2. At this time, under the action of the garbage and microorganisms, oxygen is distributed in a hyperbolic shape from top to bottom around the main air pipe 406, thereby forming three blocks from top to bottom: anaerobic zone, compatible zone and aerobic zone. The leachate generated by the garbage layer 2 will be collected in the interior of the recycling box 401. According to the water quality detected by the water quality detector 402, the discharge water pump 404 is started regularly to remove the leachate. The liquid is re-injected through the direct current pipe 405 for further reaction and decomposition. At the same time, in the initial stage of construction, the vacuum pump 407 can be started to extract the gas inside the garbage layer 2, and during the extraction, the secondary air guide pipe 409 must not be directly connected to the outside air, so that the air inside the garbage layer 2 can be exchanged. The sampling air pump 505 is started to allow the gas inside the aerobic zone to pass through the screen pipe 504 and the sampling pipe 503 into the exhaust pipe 506. The air guide head 508 is plugged into the inner side of the fixed pipe 510, and the control valve 511 is opened to allow the flowing air to enter the interior of the storage tank 513. When the pressure gauge 512 shows that the internal and external pressures of the storage tank 513 are not much different, the sampling air pump 505 is turned off, and the control valve 511 is closed. The sample gas can be obtained inside the storage tank 513, which is convenient for microbial activity detection to determine whether nutrient solution needs to be added.

[0042] Compared with the existing technology, the in-situ remediation system for landfills, through the coordinated use of the covering layer 1, the garbage layer 2, the drainage layer 3, the remediation component 400 and the nutrient component 500, can appropriately add nutrients to the microorganisms in the early stage of construction, and can also conveniently extract air to detect the internal microbial content and activity, thereby greatly shortening the time required to reach a stable state of garbage degradation, improving work efficiency, and facilitating the effective degradation of garbage in a shorter time, solving the shortcomings of the existing in-situ remediation system for landfills in the early stage of construction that can only ensure the environmental factors for microbial reproduction but cannot properly add nutrients.

[0043] The electrical components appearing in this article are all electrically connected to the main controller and the power supply. The provision of power supply is common knowledge in this field. The main controller can be a conventional known device that controls a computer, etc., and can be implemented through simple programming by technicians in this field. These are all existing publicly available power connection technologies and will not be described in detail in this article.

Claims

1. A landfill in-situ remediation system comprising a cover layer (1), characterized in that: A garbage layer (2) is provided at the bottom of the covering layer (1), a drainage layer (3) is provided at the bottom of the garbage layer (2), a repair component (400) for in-situ repair is installed on the outside of the covering layer (1), and a nutrition component (500) for nutrition supplementation is installed on the top of the covering layer (1); The nutrition component (500) includes two delivery pipes (501) passing through and fixedly connected to the top of the covering layer (1), a drainage pipe (502) fixed between the bottom ends of the two delivery pipes (501), a sampling pipe (503) passing through and fixed to the top of the covering layer (1), a screen pipe (504) fixed to the bottom end of the sampling pipe (503), a sampling air pump (505) fixedly installed on the top of the covering layer (1), an exhaust pipe (506) fixed to the exhaust end of the sampling air pump (505), and a filter pipe (507) fixed to the bottom end of the sampling air pump (507). A bellows (507) at the end of the exhaust pipe (506), an air guide head (508) fixed to the end of the bellows (507), rubber rings (509) bonded to the outside of the air guide head (508) and evenly distributed, a fixed pipe (510) that can be plugged into by the air guide head (508), a control valve (511) fixedly installed on the outside of the fixed pipe (510), a pressure gauge (512) fixedly installed on the outside of the fixed pipe (510), and a storage tank (513) fixed to the end of the fixed pipe (510).

2. The landfill in-situ remediation system according to claim 1, characterized in that: The repair component (400) includes a recovery box (401) fixedly installed on the left side of the discharge layer (3), a water quality detector (402) fixedly installed on the outside of the recovery box (401), a return pipe (403) fixedly installed on the left side of the recovery box (401), a discharge water pump (404) fixedly installed on the outside of the return pipe (403), a direct current pipe (405) fixed at the bottom of the return pipe (403), a main air pipe (406) passing through the top of the covering layer (1), an air pump (407) fixedly installed on the top of the covering layer (1), two extension pipes (408) connected to the end of the air pump (407) through a three-way valve, and a secondary air pipe (409) fixed at the bottom of the extension pipe (408).

3. The landfill in-situ remediation system according to claim 2, characterized in that: A water pipe is fixedly connected between the discharge layer (3) and the recovery box (401), and the discharge layer (3) is tilted toward the side close to the water pipe. The sensor of the water quality detector (402) passes through the left side of the recovery box (401).

4. The landfill in-situ remediation system according to claim 2, characterized in that: One end of the return pipe (403) away from the recycling box (401) extends to above the covering layer (1), and the direct current pipe (405) is arranged inside the garbage layer (2), and the two direct current pipes (405) are symmetrically distributed on the left and right sides. The outer portion of the direct current pipe (405) located inside the garbage layer (2) is provided with evenly distributed through holes.

5. The landfill in-situ remediation system according to claim 2, characterized in that: The bottom end of the main air pipe (406) sequentially penetrates the covering layer (1) and the garbage layer (2) and is fixedly connected to the top of the discharge layer (3). The outer side of the main air pipe (406) is provided with evenly distributed air guide holes.

6. The landfill in-situ remediation system according to claim 2, characterized in that: One end of the auxiliary air guide pipe (409) close to the air pump (407) is open, and an electric valve is provided at the opening. The auxiliary air guide pipe (409) is tilted, and the two auxiliary air guide pipes (409) are symmetrically distributed on the left and right. The outer portion of the auxiliary air guide pipe (409) located inside the garbage layer (2) is provided with evenly distributed circular holes.

7. The landfill in-situ remediation system according to claim 1, characterized in that: The sieve tube (504) is a tubular body with evenly distributed sieve holes on the outside, and the air inlet end of the sampling air pump (505) is fixedly connected to the end of the sampling tube (503).

8. The landfill in-situ remediation system according to claim 1, characterized in that: The inner side of the fixed tube (510) can be used for plugging the air guide head (508), and the storage tank (513) consists of a tank body and a cover, and is a stainless steel pressure tank.

Images