A landfill disaster prevention and control system

Abstract

The present invention discloses a landfill disaster prevention and control system in the field of landfill prevention and control technology, comprising a leachate prevention and control system, a hazardous gas prevention and control system and an odor prevention and control system. The leachate prevention and control system comprises a rainwater and sewage diversion module and a regulating tank prevention and control module; the hazardous gas prevention and control system comprises a landfill gas collection module, a gas monitoring module and a prevention and control module. The landfill gas collection module reduces landfill gas leakage through vertical shaft recharge and pipeline collection. The gas monitoring module comprises a plurality of gas detection devices distributed around the landfill gas collection module. The prevention and control module comprises a warning unit, an explosion-proof fan, fire-fighting materials and a safety inspection team; the odor prevention and control system comprises a plurality of gas detection points, a deodorizing curtain wall, a high-pressure mist rod spray, a mobile atomizing air cannon and a vehicle cleaning module. The present invention can achieve normal prevention and control of leachate and hazardous gases, and timely respond to rescue in danger, thereby achieving good prevention and control effects and effectively preventing odor from overflowing and spreading.

Description

Technical Field

[0001] The present invention relates to the technical field of landfill prevention and control, and in particular to a landfill disaster prevention and control system. Background Art

[0002] Rapid urbanization is generating massive amounts of waste. Among the future crises predicted by leading scientists worldwide, the waste problem looms large. The ecological damage and environmental pollution caused by this massive amount of waste are seriously impacting human life. Currently, sanitary landfill is the primary method of waste disposal in most countries, including China. Landfills generate significant amounts of odor, hazardous gases, and leachate during the waste disposal process. Landfills often lack systematic protective measures to control these factors, increasing the flammability of hazardous gases generated by accumulated garbage. The odor can spread widely, impacting the municipal environment.

[0003] Based on this, the present invention designs a landfill disaster prevention and control system to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a landfill disaster prevention and control system to solve the problem proposed in the above background technology that landfills often do not have systematic protection measures to prevent and control the above factors, resulting in an increased risk of flammability of dangerous gases generated by garbage accumulation, a wide range of odor transmission, and affecting the municipal environment.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A landfill disaster prevention and control system includes a leachate prevention and control system, a hazardous gas prevention and control system, and an odor prevention and control system. The leachate prevention and control system includes a rainwater and sewage diversion module and a regulating tank prevention and control module. The rainwater and sewage diversion module is used to control the amount of rainwater infiltration, and the regulating tank prevention and control module is used to prevent leachate leakage and provide leakage emergency measures at the same time; the hazardous gas prevention and control system includes a landfill gas collection module, a gas monitoring module, and a prevention and control module. The landfill gas collection module reduces landfill gas leakage through vertical shaft recharge and pipeline collection. The gas monitoring module includes multiple gas detection devices distributed around the landfill gas collection module. The prevention and control module includes a warning unit, an explosion-proof fan, fire-fighting materials, and a safety inspection team; the odor prevention and control system includes multiple gas detection points, a deodorizing curtain wall, a high-pressure fog rod spray, a mobile atomizing air cannon, and a vehicle cleaning module.

[0007] Preferably, the rainwater and sewage diversion module includes a drainage blind ditch and a rainwater interception dam. The drainage blind ditch is opened between the garbage pile and the excavation platform / road. At the same time, the bottom of the drainage blind ditch is filled with gravel, and the rainwater interception dam is set above the excavation pile.

[0008] Preferably, the regulating pond prevention and control module includes a main regulating pond, a temporary regulating pond and a regulating reservoir. The main regulating pond, the temporary regulating pond and the regulating reservoir are all equipped with water level monitoring devices, and the inter-pool pumping method is adopted to ensure the stability of the temporary regulating pond; the regulating reservoir should be equipped with an external transportation point, and the external transportation volume of the external transportation point must be greater than the statistical amount of leachate produced in the most recent day, and the water level monitoring frequency is once every 1-3 days.

[0009] Preferably, the regulating pond prevention and control module also includes emergency blocking, equipment maintenance and traffic control. Emergency blocking specifically involves reserving sandbags, clay and other materials that can be used for blocking in preparation for overflow blocking; equipment maintenance specifically involves equipping spare water pumps, paying attention to the use status of water pumps, ensuring power supply, and making the tailwater delivery pipeline connection in a ready state; traffic control specifically involves: ensuring the smooth flow of leachate transport vehicles, and organizing and guiding the traffic of garbage trucks and sewage transport vehicles.

[0010] Preferably, the warning unit includes a warning sign, a detection display screen and an audible and visual alarm module. The detection display screen is used to display the gas concentration information detected by the gas detection device. The audible and visual alarm module receives the gas concentration information and selectively issues audible and visual warnings. The explosion-proof fan selectively starts to evacuate the gas according to the gas concentration information. The fire-fighting materials include fire extinguishers, fire blankets and on-site water trucks. The safety inspection team conducts manual inspections to eliminate risks in a timely manner.

[0011] Preferably, the shaft recharge and pipeline collection are specifically provided by setting a plurality of recharge shafts in the recharge area, and setting a drainage shaft in the middle of which a hose is pre-buried in the drainage shaft for recharge, and a pumping pipe is pre-installed, which can be connected to pump out the leachate, and the drainage shaft is not punched within 3m from the landfill surface and within 2m from the bottom. The bottom of the pipe is sealed, a gate valve is set at the top, and a filter layer is set outside the pipe, which are geogrid, crushed stone filter layer and nylon mesh from the outside to the inside; there is no pumping pipe in the recharge shaft and the rest are the same as the drainage shaft; the landfill gas collection pipe connects all the recharge shafts and drainage shafts and is sequentially provided with gate valves for suction control, a pressure gauge is provided for air pressure monitoring, a flow meter is provided for counting the landfill gas production, a sampling port is provided for gas composition detection, the output end is connected to the suction device, and the fan is used to maintain the rated suction power for gas collection.

[0012] Preferably, the gas detection points are evenly distributed around the landfill and the excavation area, the deodorization curtain wall and high-pressure mist rod spray are set up around the landfill, the mobile atomizing air cannon is moved or added according to the air information of the gas detection points, and the vehicle cleaning module is set in the excavation loading area and equipped with bottom, side and top nozzles to clean the vehicle body and wheels.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention controls the amount of leachate through rainwater and sewage diversion and regulation and control, and balances the amount of leachate by timely drainage and transportation in normal times, and timely responds to emergency facilities, so as to achieve normal control and timely rescue in times of danger, and achieve good prevention and control effects; leaked gas is detected by a gas detection device, and gas leakage is drained and valves are closed, so as to achieve effective prevention and control of timely discovery and timely treatment; it can effectively prevent odor from overflowing and spreading, and deodorize according to the odor situation, which is more environmentally friendly and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic diagram of the blind ditch structure for rainwater and sewage diversion drainage according to the present invention;

[0017] Figure 2 This is a schematic diagram of the distribution of the recharge shaft and the pumping well of the present invention;

[0018] Figure 3 Schematic diagram of the odor prevention and control system of the present invention. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] See also Figure 1-3 , the present invention provides a technical solution:

[0021] A landfill disaster prevention and control system, including a leachate prevention and control system, a hazardous gas prevention and control system, and an odor prevention and control system;

[0022] The leachate prevention and control system includes a rainwater and sewage diversion module and a regulating tank prevention and control module. The rainwater and sewage diversion module is used to control the amount of rainwater infiltration, and the regulating tank prevention and control module is used to prevent leachate leakage and provide emergency measures for leakage; the rainwater and sewage diversion module includes a drainage blind ditch and a rainwater interception dam. The drainage blind ditch is opened between the garbage dump and the excavation platform / road. At the same time, the bottom of the drainage blind ditch is filled with gravel, and the rainwater interception dam is set above the excavation dump; the regulating tank prevention and control module includes a main regulating tank, a temporary regulating tank and a regulating reservoir. The main regulating tank, the temporary regulating tank and the regulating reservoir are all equipped with water level monitoring devices, and the inter-pool pumping method is adopted. Ensure the stability of the temporary regulating pond; the regulating reservoir should have an external transportation point, the external transportation volume of the external transportation point must be greater than the statistical amount of leachate produced in the most recent day, and the water level monitoring frequency is once every 1-3 days; the regulating pond prevention and control module also includes emergency blocking, equipment maintenance and traffic control. Emergency blocking specifically involves reserving sandbags, clay and other materials that can be used for blocking in preparation for overflow blocking; equipment maintenance specifically involves matching spare water pumps, paying attention to the use status of water pumps, ensuring power supply, and making the tailwater delivery pipeline connection in a ready state; traffic control specifically involves: ensuring the smooth flow of leachate transport vehicles, and organizing and guiding the traffic of garbage trucks and sewage transport vehicles.

[0023] The amount of leachate can be controlled through rainwater and sewage diversion and regulation and control, and the amount of leachate can be balanced by timely drainage and transportation in normal times. The supporting emergency facilities can respond in time, so that normal prevention and control can be carried out and rescue can be carried out in time in times of danger, achieving good prevention and control effects.

[0024] The hazardous gas prevention and control system includes a landfill gas collection module, a gas monitoring module and a prevention and control module. The landfill gas collection module reduces landfill gas leakage through shaft re-injection and pipeline collection. The gas monitoring module includes multiple gas detection devices distributed around the landfill gas collection module. The prevention and control module includes an alarm unit, an explosion-proof fan, fire-fighting materials and a safety inspection team. The shaft re-injection and pipeline collection are specifically to set up multiple re-injection shafts in the middle of the re-injection area to set up a pumping shaft. A hose is pre-buried in the pumping shaft for re-injection. A water pump is pre-installed and can be connected to pump out leachate. The pumping shaft is at a distance of 100 meters. No holes are drilled within 3m of the landfill surface, and no holes are drilled within 2m of the bottom. The bottom of the pipe is sealed, a gate valve is installed at the top, and a filter layer is installed on the outside of the pipe, which consists of a geogrid, a crushed stone filter layer, and a nylon mesh from the outside to the inside. There is no pumping pipe in the recharge shaft, and the rest is the same as the drainage shaft. The landfill gas collection pipe connects all recharge shafts and drainage shafts and is equipped with gate valves for extraction control, a pressure gauge for air pressure monitoring, a flow meter for landfill gas production statistics, a sampling port for gas composition detection, and the output end is connected to a suction device. The gas is collected by a fan at the rated extraction power.

[0025] When the leachate is insufficient, reinjection liquid is injected into the reinjection shaft to ensure that the gas overflow production is increased to control the amount of leachate. The landfill gas is collected and reused through the drainage shaft to save energy, and the matching fan is used to extract as soon as possible to reduce leakage. The valve can be closed in time to control leakage. The leaked gas is detected by the peripheral gas detection device. If landfill gas is detected, if the amount is small, it will be evacuated first through the explosion-proof fan and the response valve will be closed. If it is large, the warning unit will immediately issue an audible and visual signal alarm, prepare fire-fighting materials, and at the same time, carry out gas diversion and valve closing, so as to achieve effective prevention and control through timely discovery and timely treatment.

[0026] The odor prevention and control system includes multiple gas detection points, deodorization curtain walls, high-pressure mist rod sprays, mobile atomizing air cannons and vehicle cleaning modules; the gas detection points are evenly distributed around the landfill and the excavation area, the deodorization curtain walls and high-pressure mist rod sprays are set up around the landfill, the mobile atomizing air cannons are moved or added according to the air information of the gas detection points, and the vehicle cleaning module is located in the excavation loading area and is equipped with bottom, side and top nozzles to clean the vehicle body and wheels.

[0027] Mobile atomizing air cannons are installed in the excavation area to continuously spray deodorants for deodorization. At the same time, geotextiles are used to cover the exposed surface of the garbage in a timely manner; slaked lime is sprinkled around the platform; and EM bacteria are sprayed on the leveled garbage surface.

[0028] Through the detection information of gas detection points, mobile air cannons are promptly added in places with high odor concentration, and high-pressure atomizing spray rods are started at corresponding positions; when the odor concentration is detected to be high at most gas detection points, the deodorization curtain wall is started to realize negative pressure extraction, filtration and spraying deodorization.

[0029] In the excavation and loading operation area, before the vehicle is fully loaded and drives out, the vehicle body and wheels are sprayed and cleaned through nozzles in all directions to clean and deodorize the vehicle.

[0030] It can effectively prevent the overflow and spread of odor, and remove odor according to the odor situation, which is more environmentally friendly and efficient.

[0031] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0032] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A landfill disaster prevention and control system, characterized by: It includes a leachate control system, a hazardous gas control system, and an odor control system. The leachate control system includes a rainwater and sewage diversion module and a regulating tank control module. The rainwater and sewage diversion module is used to control the amount of rainwater infiltration, and the regulating tank control module is used to prevent leachate leakage and provide emergency measures for leakage. The hazardous gas control system includes a landfill gas collection module, a gas monitoring module, and a control module. The landfill gas collection module reduces landfill gas leakage through vertical shaft recharge and pipeline collection. The gas monitoring module includes multiple gas detection devices distributed around the landfill gas collection module. The control module includes a warning unit, an explosion-proof fan, fire-fighting materials, and a safety inspection team. The odor control system includes multiple gas detection points, a deodorization curtain wall, a high-pressure fog rod spray, a mobile atomizing air cannon, and a vehicle cleaning module. The shaft recharge and pipeline collection are specifically as follows: multiple recharge shafts are set in the recharge area, and a drainage shaft is set in the middle of the recharge area. A hose is pre-buried in the drainage shaft, which is used for recharge. A pumping pipe is pre-installed and can be connected to pump out leachate. The drainage shaft is not drilled within 3m from the landfill surface and within 2m from the bottom. The bottom of the pipe is sealed, a gate valve is set at the top, and a filter layer is set outside the pipe, which includes geogrid, crushed stone filter layer and nylon mesh from the outside to the inside; there is no pumping pipe in the recharge shaft, and the rest is the same as the drainage shaft; the landfill gas collection pipe connects all the recharge shafts and drainage shafts and is sequentially provided with gate valves for suction control, a pressure gauge for air pressure monitoring, a flow meter for counting landfill gas production, a sampling port for gas composition detection, and an output end connected to a suction device, using a fan to maintain the rated suction power for gas collection.

2. A landfill disaster prevention and control system according to claim 1, characterized in that: The rainwater and sewage diversion module includes a drainage blind ditch and a rainwater interception dam. The drainage blind ditch is opened between the garbage pile and the excavation platform / road. At the same time, the bottom of the drainage blind ditch is filled with gravel, and the rainwater interception dam is set above the excavation pile.

3. A landfill disaster prevention and control system according to claim 1, characterized in that: The regulating pond prevention and control module includes a main regulating pond, a temporary regulating pond and a regulating reservoir. The main regulating pond, the temporary regulating pond and the regulating reservoir are all equipped with water level monitoring devices, and the inter-pool pumping method is adopted to ensure the stability of the temporary regulating pond; the regulating reservoir should have an external transportation point, and the external transportation volume of the external transportation point must be greater than the statistical amount of leachate produced in the most recent day. The water level monitoring frequency is once every 1-3 days.

4. A landfill disaster prevention and control system according to claim 3, characterized in that: The control module of the regulating pond also includes emergency blocking, equipment maintenance and traffic control. Emergency blocking specifically involves stockpiling sandbags, clay and other materials that can be used for blocking in preparation for overflow blocking; equipment maintenance specifically involves equipping spare water pumps, paying attention to the use status of water pumps, ensuring power supply, and making the tailwater delivery pipeline connection in a ready state; traffic control specifically involves: ensuring the smooth flow of leachate transport vehicles, and organizing and guiding the traffic of garbage trucks and sewage transport vehicles.

5. A landfill disaster prevention and control system according to claim 1, characterized in that: The warning unit includes a warning sign, a detection display screen and an audible and visual alarm module. The detection display screen is used to display the gas concentration information detected by the gas detection device. The audible and visual alarm module receives the gas concentration information and selectively issues audible and visual warnings. The explosion-proof fan selectively starts to evacuate the gas according to the gas concentration information. The fire-fighting materials include fire extinguishers, fire blankets and on-site water trucks. The safety inspection team conducts manual inspections to eliminate risks in a timely manner.

6. A landfill disaster prevention and control system according to claim 1, characterized in that: The gas detection points are evenly distributed around the landfill and the excavation area. The deodorization curtain wall and high-pressure mist rod spray are set up around the landfill. The mobile atomizing air cannons are moved or added according to the air information of the gas detection points. The vehicle cleaning module is set in the excavation loading area and is equipped with bottom, side and top nozzles to clean the vehicle body and wheels.

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