CN212452804U - Simple industrial solid waste storage place pollution blocking system - Google Patents
Simple industrial solid waste storage place pollution blocking system Download PDFInfo
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- CN212452804U CN212452804U CN202020946812.6U CN202020946812U CN212452804U CN 212452804 U CN212452804 U CN 212452804U CN 202020946812 U CN202020946812 U CN 202020946812U CN 212452804 U CN212452804 U CN 212452804U
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Abstract
The invention discloses a pollution blocking system for a simple industrial solid waste storage place. The device comprises a site water-resisting layer and vertical impermeable layers arranged on the periphery of the site water-resisting layer, wherein the site water-resisting layer and the vertical impermeable layers form a pile body accommodating space; a gas injection system and a gas extraction system are arranged in the accommodating space; a leachate collecting system is arranged on the site water-resisting layer; and a leachate recharging device is arranged at the top of the pile body. According to the invention, the structure of the traditional pollution blocking system is optimized and adjusted, the stabilization of industrial solid wastes, especially strong-alkaline waste residues, is accelerated, the site pollution risk control and pollution treatment and restoration are considered, the generation amount of leachate in the site is reduced, the later operation and maintenance period of the site is shortened, the operation and monitoring cost of the pollution blocking system is reduced, and the economical efficiency is improved. Meanwhile, the stabilizing method adopted by the invention is simple and feasible, safe and economical, and does not have the risk of secondary environmental pollution.
Description
Technical Field
The invention belongs to the technical field of pollution site risk management and control, and particularly relates to a pollution blocking system of a simple industrial solid waste storage site.
Background
With the continuous advance of urban industrialization in China, a great amount of common industrial solid wastes are generated, including steel slag, fly ash, metallurgical slag, furnace slag and the like. According to the statistical data of the annual newspaper for preventing and treating the pollution of the solid wastes to the environment in the cities in China, the generation amount of general industrial solid wastes in China is about 15 hundred million tons at present, the comprehensive utilization rate is less than 50 percent, the treatment capacity and the generation amount of the general industrial solid wastes in China cannot be completely matched, the phenomena of illegal dumping, random stacking, simple disposal and the like still often occur, particularly, the stock industrial solid wastes which are not effectively and reasonably treated and utilized in the long-term urban development and construction process and are simply stored have serious influence on the environment media such as soil, surface water, underground water, air and the like in the stacking process, and if the migration and transformation of pollutants cannot be effectively controlled, the ecological environment and the body health of people can be continuously harmed.
Because the environmental remediation industry in China is still in the initial development stage and is limited by a plurality of factors such as the industry scale, the technical level, the business mode and the like, the large-area remediation and treatment work of the industrial field is very difficult to develop in a short period. Meanwhile, the toxicity of general industrial solid wastes is low, the environmental influence of II-type industrial solid wastes such as steel slag, fly ash and the like is caused by leaching and migration of alkaline substances, for similar conditions, China mainly adopts a pollution risk control means to limit the migration and diffusion of pollutants in a site, one of common risk control technologies is to establish a vertical pollution blocking system, and an anti-seepage barrier is arranged at the boundary of a polluted site to block the pollutants so as to prevent the pollution diffusion. However, after the traditional industrial site pollution blocking system is built, professionals are required to operate for a long time and carry out environmental monitoring, leachate and surface runoff rainwater are treated in a centralized mode regularly, safety and effectiveness of pollution risk control are guaranteed, a large amount of manpower, material resources and financial resources are consumed, and subsequent development and utilization of the site are influenced.
The pollution blocking systems introduced in the invention patent of china, namely a pollution blocking structure and an anti-seepage system (application No. 201811584951.2) and the pollution blocking structure and method constructed based on the anti-seepage system (application No. 201810464309.4), all belong to the improvement and innovation of an anti-seepage layer structure, in other words, belong to the local improvement and innovation of the pollution blocking system, and cannot solve and optimize the defects of the traditional pollution blocking system.
Disclosure of Invention
In order to overcome the defects, the invention provides a pollution blocking system of an industrial solid waste simple storage place, aiming at the problems and technical defects of the traditional place pollution blocking system. The system can realize the pollution risk management control and the treatment and restoration of the simple industrial solid waste storage place, shorten the later operation and maintenance period of the place, reduce the operation cost and avoid secondary environmental pollution.
In order to achieve the purpose, the pollution blocking system for the simple industrial solid waste storage place comprises a place water-resisting layer and vertical impermeable layers arranged on the periphery of the place water-resisting layer, wherein the place water-resisting layer and the vertical impermeable layers form a pile body accommodating space; a gas injection system and a gas extraction system are arranged in the accommodating space; a leachate collecting system is arranged on the site water-resisting layer; and a leachate recharging device is arranged at the top of the pile body.
Furthermore, the vertical impervious layer is a slurry ditch impervious wall, a geomembrane composite impervious wall, a jet grouting impervious wall or a stirring grouting impervious wall, and the permeability coefficient is not more than 1 multiplied by 10-7cm/s, embedding the bottom of the impervious wall into the site waterproof layer, wherein the embedding depth is not less than 1.0 m.
Furthermore, the gas injection system consists of a plurality of gas injection wells which are vertically inserted in the stack body in a horizontal and vertical arrangement; the gas injection well comprises a slotted pipe and an external protective layer.
Further, the gas injection well be hard polyethylene slit pipe material, diameter 20mm ~ 100mm, gas injection well casing pipe wall evenly crack from top 1m department, the seam is wide 0.2mm ~ 0.5mm, the slit pipeline section is arranged in 1m ~ 3m position under the heap body top, the pipeline section outer wall of cracking twines protective material, the slit pipe top is passed through the pipeline and is linked to each other with the air-blower, the wind pressure is 3Kpa ~ 6 Kpa.
Further, the gas injection well injects a gas medium for stabilizing the stack body, including air, carbon dioxide and/or flue gas which is purified by industrial enterprises and meets the emission standard.
Furthermore, the gas extraction system is composed of a plurality of gas extraction wells which are arranged in parallel, and the gas extraction wells are arranged between more than two adjacent gas injection wells.
Further, the gas extraction well is made of a hard polyethylene slotted pipe, and the diameter of a well pipe of the extraction well is 50-200 mm; the outer side of the slotted pipe section is provided with a gas guide and exhaust layer, the gas guide and exhaust layer consists of a gravel layer with the thickness of 200-300 mm, the particle size of the gravel is 10-20 mm, the upper part of the guide and exhaust layer is filled with gravel to a position 100-200 mm away from the top, and the guide and exhaust layer is sealed by bentonite or clay; the top of the gas extraction well is connected with a vacuum pump through a pipeline, the vacuum degree of the system is controlled between-0.07 MPa and-0.05 MPa, and the extraction flow is 50L/min to 100L/min.
Further, leachate collecting system is including setting up leachate collecting well, filtration liquid elevator pump and leachate collecting pit on water barrier upper portion, and the leachate of collecting passes through the effect of elevator pump, carries to leachate collecting pit.
Furthermore, the leachate recharging device is composed of a drip irrigation pipe network which is paved on the upper part of the pile body, the drip irrigation pipe network is composed of a drip irrigation system water transmission and distribution main pipe and branch pipes, the main pipe and the branch pipes are arranged in the vertical direction, and leachate in the leachate collecting pool is conveyed into the recharging device through a pump. The leachate recharging device is mainly used for realizing the circulation of leachate in a pile body, improving the liquid-solid ratio of solid-liquid reaction, accelerating the leaching of soluble substances in industrial solid waste, and regulating the stabilization process of the industrial solid waste taking gas-solid reaction as the main factor into the stabilization process taking gas-liquid reaction or liquid-solid reaction as the main factor by matching with a gas injection process, so that the rapid stabilization of the industrial solid waste is realized, the stabilization reaction rate is improved, the reaction time is shortened, and the generation amount and the treatment cost of leachate are reduced.
The invention has the advantages that:
1. the industrial solid waste has certain particle size and porosity, so that the diffusion of injected gas is facilitated, and the stabilization process of the solid waste can be accelerated;
2. compared with the traditional site pollution blocking system, the system adopts a pneumatic and liquid circulating mode to strengthen the stabilization condition of industrial solid wastes and realizes the treatment and restoration of the site to a certain extent on the basis of effectively preventing and controlling the migration and diffusion of pollutants in the site;
3. because the recharging circulation of the leachate is realized, the production amount and the treatment amount of the leachate are reduced, and the operation cost is effectively reduced;
4. by shortening the stabilization process of the industrial solid waste, the operation period of risk management and control at the later stage of the site is greatly shortened, and the subsequent development and utilization of the site are facilitated;
5. the system has the advantages of simple structure, low construction cost, convenient operation, no secondary pollution, wide application range and wide application prospect.
Drawings
FIG. 1 is a schematic structural diagram according to the present invention;
the sequence numbers in the figures illustrate:
(1) a site water barrier; (2) a field weakly permeable stratum; (3) general industrial solid waste dumps; (4) a vertical impervious wall;
(5) a leachate collection tank; (6) a vacuum pump; (7) a leachate lift well; (8) a blower; (9) a gas injection well;
(10) a gas extraction well; (11) leachate recharging device.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the embodiments described below.
Example 1:
as shown in fig. 1, the pollution blocking system for the simple industrial solid waste storage site comprises a site water-resisting layer 1 and a vertical impermeable layer 4 arranged on the periphery of the site water-resisting layer, wherein an industrial solid waste pile is placed in an accommodating space surrounded by the site water-resisting layer 1 and the vertical impermeable layer; the vertical seepage-proofing system is arranged along the stacking boundary of the stacking body; the gas injection system (9) and the gas extraction system (10) are vertically inserted into the stack body; a leachate collecting system (7) is arranged on the site waterproof layer, and a leachate recharging device (11) is laid on the top of the pile body; wherein, the industrial solid waste storage place is a natural and simple industrial solid waste storage place without an anti-seepage system and a leachate drainage system.
Before constructing the pollution barrier system, site investigation should be firstly carried out to survey the boundary and stockpiling depth of the industrial solid waste stockpile body (3), wherein the stockpiled industrial solid waste is metallurgical steel slag and slag-type general industrial solid waste. After the site investigation work is finished, arranging a vertical impervious wall (4) along the boundary of the pile according to the investigation result, wherein the impervious wall is a geomembrane composite impervious wall, the impervious wall is 60cm in thickness, the wall material is a cement-bentonite mixture, the proportion of the cement and the bentonite is designed to be 6 percent of bentonite and 18 percent of cement (by weight) which are mixed with water, 5 percent of blast furnace slag can be added in the actual engineering to improve the impervious coefficient of the wall, the geomembrane material is a HDPE geomembrane, the thickness of the geomembrane is 0.15cm, and the integral seepage system is formed by mixing the cement and the bentonite with the waterThe number is less than 1.0 × 10-7cm/s, and the construction depth of the impervious wall is 1.5m of the embedded waterproof layer (1).
The leachate generated by the action of natural precipitation and surface runoff in the pile body is collected by a leachate lifting well (7), the leachate lifting well is a perforated pipe made of hard polyethylene, the aperture is 3mm, the perforation rate is 28%, the bottom of the leachate lifting well is arranged in a weak permeable layer on the upper part of a storage yard water-resisting layer (1), and the leachate in the storage yard is collected by the perforated pipe and then is pumped by a lifting pump to a leachate collecting pool (5) for temporary storage.
The gas injection system (9) is composed of a plurality of gas injection wells which are vertically inserted in the pile body, the slit pipe is made of hard polyethylene slit pipe materials, the diameter of the slit pipe is 20mm, the position, 1m away from the top end, of the pipe wall of the well pipe starts to slit uniformly, the slit width is 0.2mm, the slit pipe section is arranged at the position 2m below the top of the pile body, the outer wall of the slit pipe section is wrapped with gauze to protect the pipe wall, the top end of the slit pipe is connected with the air blower (8) through a pipeline, and the air pressure is 3 Kpa.
The gas extraction system (10) is composed of a plurality of gas extraction wells which are arranged in parallel, wherein a single gas extraction well is arranged at the central position of four gas injection wells and is vertically inserted into the solid waste pile body (3), the gas extraction well is made of hard polyethylene slotted pipe materials, the diameter of a well pipe of the extraction well is 50mm, a gas guide and exhaust layer is arranged on the outer side of a slotted pipe section and is composed of a gravel layer with the thickness of 200mm, the particle size of the gravel is 20mm, the upper part of the guide and exhaust layer is filled to a position 100mm away from the top by gravel and sealed by bentonite, the top of the gas extraction well is connected with a vacuum pump (6) through a pipeline, the vacuum degree of the system is controlled to be-0.05 MPa, and the extraction flow rate.
The leachate recharging device (11) is formed by a drip irrigation pipe network which is paved on the upper part of the pile body, the drip irrigation pipe network is formed by a drip irrigation system water transmission and distribution main pipe and branch pipes, the main pipe and the branch pipes are arranged in the vertical direction, and leachate in the leachate collecting pool (5) is conveyed to the recharging device (11) through a pump to realize recharging of the leachate.
In the actual engineering process, if the modification of an industrial solid waste storage place with a horizontal anti-seepage system built in a storage yard is carried out, the artificial anti-seepage structure or the natural anti-seepage structure of the bottom and the side slope of the place can be directly utilized, and a leachate circulating system, a gas injection and extraction system are additionally arranged, so that the rapid stabilization of the solid waste in the storage place is realized, and the later development and utilization of the place are facilitated.
Example 2:
in the embodiment, the vertical impervious wall (4) is a plastic concrete impervious wall, and the thickness of the impervious wall is 100 cm.
The diameter of a well pipe of the gas injection well is 50mm, the seam width is 0.5mm, a slotted pipe section is arranged at the position 3m below the top of the pile body, the top end of the slotted pipe is connected with an air blower (8) through a pipeline, and the air pressure is 6 Kpa.
The diameter of a well pipe of the gas extraction well is 200mm, a gas guide and exhaust layer on the outer side of a slotted pipe section consists of a gravel layer with the thickness of 300mm, the particle size of the gravel is 20mm, the upper part of the guide and exhaust layer is filled with gravel to a position 200mm away from the top and sealed by clay, the top of the gas extraction well is connected with a vacuum pump (6) through a pipeline, the vacuum degree of the system is controlled to be-0.07 MPa, and the extraction flow is 100L/min.
The rest is the same as example 1.
In summary, the invention provides a pollution blocking system for a simple industrial solid waste storage place, which accelerates the stabilization of industrial solid waste, particularly strong alkaline waste residues, by optimizing and adjusting the structure of the traditional pollution blocking system, gives consideration to site pollution risk control and pollution treatment and restoration, reduces the generation amount of leachate in a site, shortens the later operation and maintenance period of the site, reduces the operation and monitoring cost of the pollution blocking system, and improves the economy. Meanwhile, the stabilizing method adopted by the invention is simple and feasible, safe and economical, and does not have the risk of secondary environmental pollution. The system is applied to pollution risk blocking and control of common industrial solid waste simple storage places, and rapid and stable industrial solid waste is realized.
The invention is also suitable for the reconstruction of the industrial solid waste storage place with a horizontal anti-seepage system, utilizes the bottom and side slope artificial anti-seepage structure or natural anti-seepage structure of the place, and is additionally provided with a leachate circulating system and a gas injection and extraction system, thereby realizing the rapid stabilization of the solid waste in the storage place and facilitating the later development and utilization of the place.
The above description is presented to enable one of ordinary skill in the art to make and use the invention and is not intended to limit the invention. Modifications and variations of this disclosure will occur to those skilled in the art, in light of this disclosure and the skill of this art. Any modification within the spirit and scope of the present invention is intended to be covered by the appended claims.
Claims (9)
1. The pollution blocking system for the simple industrial solid waste storage place is characterized by comprising a site water-resisting layer and vertical impermeable layers arranged on the periphery of the site water-resisting layer, wherein the site water-resisting layer and the vertical impermeable layers form a pile body accommodating space; a gas injection system and a gas extraction system are arranged in the accommodating space; a leachate collecting system is arranged on the site water-resisting layer; and a leachate recharging device is arranged at the top of the pile body.
2. The simple industrial solid waste storage site pollution barrier system according to claim 1, wherein the vertical barrier layer is a slurry ditch barrier wall, a geomembrane composite barrier wall, a jet grouting barrier wall or a stirring grouting barrier wall, and the permeability coefficient is not more than 1 x 10-7cm/s, embedding the bottom of the impervious wall into the site waterproof layer, wherein the embedding depth is not less than 1.0 m.
3. The simple industrial solid waste storage site contamination barrier system of claim 1, wherein the gas injection system is comprised of a plurality of gas injection wells vertically inserted in a stack in a vertical and horizontal arrangement; the gas injection well comprises a slotted pipe and an external protective layer.
4. The simple industrial solid waste storage site pollution barrier system as claimed in claim 3, wherein said gas injection well is made of hard polyethylene slotted pipe material with a diameter of 20 mm-100 mm, said well pipe wall of said gas injection well is uniformly slotted at a position 1m from the top end, said slot is 0.2 mm-0.5 mm wide, said slotted pipe section is arranged at a position 1 m-3 m below the top of the stack, the outer wall of said slotted pipe section is wrapped with protective material, the top end of said slotted pipe is connected with a blower through a pipe, and the wind pressure is 3 Kpa-6 Kpa.
5. The pollution-barrier system of claim 3, wherein the gas injection well injects a gas medium for stabilization of the heap, the gas medium comprising air, carbon dioxide and/or flue gas of industrial enterprises which meet emission standards after purification.
6. The pollution-prevention system for the industrial solid waste simple storage site as claimed in claim 3, wherein the gas extraction system is composed of a plurality of gas extraction wells arranged in parallel, and the gas extraction wells are arranged between more than two adjacent gas injection wells.
7. The simple industrial solid waste storage site pollution barrier system as claimed in claim 6, wherein said gas extraction well is made of hard polyethylene slotted pipe material, and the diameter of the well pipe of the extraction well is 50 mm-200 mm; the outer side of the slotted pipe section is provided with a gas guide and exhaust layer, the gas guide and exhaust layer consists of a gravel layer with the thickness of 200-300 mm, the particle size of the gravel is 10-20 mm, the upper part of the guide and exhaust layer is filled with gravel to a position 100-200 mm away from the top, and the guide and exhaust layer is sealed by bentonite or clay; the top of the gas extraction well is connected with a vacuum pump through a pipeline, the vacuum degree of the system is controlled between-0.07 MPa and-0.05 MPa, and the extraction flow is 50L/min to 100L/min.
8. The simple industrial solid waste storage site pollution barrier system according to claim 1, wherein the leachate collection system comprises a leachate collection well, a leachate lift pump and a leachate collection tank which are arranged on the upper part of the water-resisting layer, and the collected leachate is conveyed to the leachate collection tank through the action of the lift pump.
9. The pollution prevention system as claimed in claim 1, wherein the leachate recirculation apparatus is formed of a drip irrigation pipe network laid on the upper portion of the stack, the drip irrigation pipe network is formed of a main pipe and a branch pipe of a drip irrigation system, the main pipe and the branch pipe are arranged in a vertical direction, and leachate in the leachate collection tank is pumped into the recirculation apparatus.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338349A (en) * | 2021-06-09 | 2021-09-03 | 中冶节能环保有限责任公司 | Novel steel slag landfill vertical separation system and implementation method |
| CN114273411A (en) * | 2022-01-05 | 2022-04-05 | 北京高能时代环境技术股份有限公司 | Combined restoration system and restoration method for organic polluted site |
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2020
- 2020-05-29 CN CN202020946812.6U patent/CN212452804U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338349A (en) * | 2021-06-09 | 2021-09-03 | 中冶节能环保有限责任公司 | Novel steel slag landfill vertical separation system and implementation method |
| CN114273411A (en) * | 2022-01-05 | 2022-04-05 | 北京高能时代环境技术股份有限公司 | Combined restoration system and restoration method for organic polluted site |
| CN114273411B (en) * | 2022-01-05 | 2022-11-25 | 北京高能时代环境技术股份有限公司 | Combined restoration system and restoration method for organic polluted site |
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