CN111036662A - Soil pollutant removing and treating system - Google Patents
Soil pollutant removing and treating system Download PDFInfo
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- CN111036662A CN111036662A CN201911242127.3A CN201911242127A CN111036662A CN 111036662 A CN111036662 A CN 111036662A CN 201911242127 A CN201911242127 A CN 201911242127A CN 111036662 A CN111036662 A CN 111036662A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/005—Extraction of vapours or gases using vacuum or venting
Abstract
The invention relates to the field of soil purification, in particular to a soil pollutant removal treatment system, which comprises a heat preservation room, a treatment pool and a reservoir, wherein a water-permeable top plate is arranged in the treatment pool, the lower layer is a diving layer, the bottom of the diving layer is provided with a heating device, the top of the treatment pool is provided with an inverted V-shaped sealing cover, an exhaust pipe is arranged right above the top of the treatment pool, the other end of the treatment pool is connected with the reservoir through a condenser pipe, the upper layer side wall of the treatment pool is provided with a water outlet pipe, the lower layer side wall of the treatment pool is provided with a water inlet pipe, a water return pipe is arranged below the water inlet pipe, the exhaust pipe, the water outlet pipe and the water return pipe are respectively provided with an exhaust pump and a purifier, and the water inlet pipe is provided with the exhaust pump. The pollution elements are recycled, and the effects of energy conservation and emission reduction are achieved.
Description
Technical Field
The invention relates to the field of soil purification, in particular to a soil pollutant removal treatment system.
Background
In recent years, with the continuous deepening of the industrialization, urbanization and rural intensification progress of China, social economy is continuously developed, but meanwhile, the problems of soil pollution are increasingly serious due to the random use of various energy sources and resources, the random discharge of industrial three wastes, the unreasonable stacking of urban building waste and domestic garbage, the tail gas discharge of vehicles, the application of chemical fertilizers and pesticides in rural areas and the like. The increasingly worsened soil pollution condition and the non-renewable characteristic of soil become a great problem which seriously restricts the sustainable development of China, the problem of soil pollution is solved, the urgent need of the economic development of China is already met, and the current common treatment methods comprise:
physical repair: the method comprises a soil-moving method, a soil-changing method, a plowing method, a vacuum suction method, a heating method, an electric field driving method, reinforced breaking, air injection, an in-situ vitrification technology, an electrodynamic technology, air stripping, ex-situ solidification and the like. The soil replacement method still relates to the problem of secondary soil pollution in further treatment, and the soil is a resource, and large-scale soil replacement and soil replacement require a large amount of exogenous soil, which is still a problem to be solved. Other methods, based on different physical principles, can achieve better effects of removing soil pollutants or reducing the toxicity of pollutants, but generally still have higher cost.
Chemical repair: the method comprises the steps of washing, oxidation reduction, permeable reactive barrier and the like, can remove soil pollutants or reduce the toxicity of soil pollution, has good repairing effect, short period and high efficiency, but chemical repairing often needs adding some chemical agents, has relatively high cost and can still cause secondary pollution.
Biological repair: the method comprises phytoremediation and microbial remediation, wherein the phytoremediation comprises plant absorption, pollutant degradation by plant secretion and the like, and the microbial remediation mainly degrades the soil pollutants through microbes so as to achieve the aim of soil remediation. The method has good treatment effect and low treatment cost, does not cause secondary pollution, but has slow repair rate and needs quite long time to reach the regulation and control level.
Therefore, although most of the methods are applied to practice, many methods have the problems of high equipment and instrument cost, poor effect, secondary pollution and the like. However, these methods provide rich theoretical guidance in the aspect of soil pollution treatment, and based on the above background, there is a need to design a treatment system for effectively removing soil pollutants, which can effectively solve the problems of high cost, low decontamination efficiency, and the like.
Disclosure of Invention
The invention aims to provide a soil pollutant removal treatment system, which is provided with a removal system for movable pollutants in soil based on a salinity surface area principle by combining a pollutant migration and transformation rule on the basis of fully analyzing the existing method.
In order to achieve the purpose, the invention adopts the following technical scheme:
the soil pollutant removing and treating system comprises a heat preservation room, a treating pool and a water storage pool, wherein the treating pool is arranged in the heat preservation room, the water storage pool is arranged outside the heat preservation room, a horizontal water-permeable top plate is arranged in the treating pool to divide the inside of the treating pool into an upper layer and a lower layer, the lower layer is a diving layer, the water-permeable top plate is positioned at the lower half part of the inner side of the treating pool, a heating device is arranged at the bottom of the diving layer, an inverted V-shaped sealing cover is arranged at the top of the treating pool in a closed manner, an air suction opening is formed in the center of the top of the inverted V-shaped sealing cover, an air suction pipe is arranged right above the air suction opening, one end of the air suction pipe is connected with the air suction opening through a lifting pipe, the other end of the air suction pipe penetrates through the heat preservation room and is connected with the, the outlet pipe is located the top of inlet tube, and the bottom of condenser pipe and the middle part intercommunication of inlet tube are provided with the wet return of a intercommunication layer of diving and cistern in the below of inlet tube, and cistern, inlet tube, layer of diving and wet return constitute the circulation water route jointly, equally divide on exhaust tube, outlet pipe and the wet return and do not be provided with an aspiration pump and a clarifier, are provided with an aspiration pump on the inlet tube.
As a preferred scheme of the soil pollutant removal treatment system, a heat preservation room is built by hollow bricks, a heat insulation layer is wrapped on the outer wall of the heat preservation room, and the distance between the top height of the heat preservation room and the upper edge of the treatment pool is 3 m.
As an optimal scheme of the soil pollutant removal treatment system, the treatment tank adopts a positive topography design, the treatment tank is a brick tank, and the inner wall and the bottom of the treatment tank are both ironed by concrete and subjected to waterproof treatment.
As a preferred scheme of the soil pollutant removal treatment system, the upper part of the side wall of the diving layer part of the treatment pool is provided with an air vent, the side wall of the middle lower part of the other side of the diving layer is provided with an external communicating pipe, and the side wall of the diving layer below the external communicating pipe is provided with a sewage outlet.
As a preferred scheme of the soil pollutant removal treatment system, a filter screen is additionally arranged on the upper side wall of the treatment tank, and the filter screen is connected with a water outlet pipe.
As a preferred scheme of the soil pollutant removal treatment system, valves are arranged between the purifier and the filter screen on the water outlet pipe, at the inner side and the outer side of the heat-insulating room of the water inlet pipe and at the inner side of the heat-insulating room of the water return pipe.
As an optimal scheme of the soil pollutant removal treatment system, an upper mounting hole and a lower mounting hole are formed in the side wall of the treatment pool above the water-permeable top plate, and a pollutant monitoring sensor is additionally arranged in each mounting hole.
As a preferred scheme of the soil pollutant removal treatment system, an air pressure sensor and a temperature and humidity sensor are arranged on the inner wall of the top of the treatment pool.
The invention has the beneficial effects that:
(1) the design of the invention can realize the surface accumulation effect of soluble soil pollutants;
(2) the invention aims to remove pollutants from soil and has a permanent effect.
(3) The scale of the design and construction system can be determined according to the treatment requirement of the polluted soil in the region and the construction cost, expensive large equipment is not needed, the cost is low, the treatment time is short, and the effect is good. And after the system is built, the system is durable.
(4) The heat source designed by the invention can fully utilize industrial waste heat, and the recycling of the waste heat is realized.
(5) The design and construction system of the invention has no strict requirements on environmental conditions, and has no influence on the environment in the process of treating the polluted soil.
(6) The invention designs the heat recovery processing module during steam condensation, and simultaneously further recycles the treated sewage, thereby achieving the effects of energy conservation and emission reduction.
(7) The invention can repeatedly concentrate and accumulate pollutants accumulated on the surface layer of the soil for many times, and can realize the recycling of pollutant elements.
(8) The amount of soil which can be treated at one time is mainly determined by the size of the treatment pool. Therefore, treatment pools of a certain size and quantity can be constructed according to the demand.
The invention mainly aims at removing the movable pollutants, particularly the metal element pollutants, and the more serious the soil pollution is, the better the removal effect is. By expanding and amplifying the design of the scheme and putting the scheme into production practice, the effects of centralized treatment of pollutants in soil, recycling of pollution elements and energy conservation and emission reduction can be achieved, and the method has great significance for soil remediation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic diagram of the system of the present invention.
In the figure: the device comprises a heat preservation room 1, a treatment pool 2, a reservoir 3, a permeable top plate 4, a diving layer 5, a heating device 6, an inverted V-shaped sealing cover 7, an exhaust pipe 8, a water return pipe 9, an exhaust pump 10, a purifier 11, an air vent 12, an external communicating pipe 13, a sewage discharge outlet 14, a valve 15, a mounting hole 16, a lifting pipe 17, an air pressure and temperature and humidity sensor 18, a condensation pipe 19, a filter screen 20, a water outlet pipe 21 and a water inlet pipe 22.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and the specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being fixed or detachable or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, a soil pollutant removing and treating system comprises a heat preservation room 1, a treating tank 2 and a water storage tank 3, wherein the treating tank 2 is arranged in the heat preservation room 1, the water storage tank 3 is arranged outside the heat preservation room 1, a horizontal water-permeable top plate 4 is arranged in the treating tank 2 to divide the interior of the treating tank 2 into an upper layer and a lower layer, the lower layer is a diving layer 5, the water-permeable top plate 4 is supported by a cement pier or a cement wall built at the bottom of the tank, polluted soil to be treated is stacked on the top plate, the water-permeable top plate 4 is positioned at the lower half part of the inner side of the treating tank 2, a heating device 6 is arranged at the bottom of the diving layer 5, an inverted V-shaped sealing cover 7 is arranged at the top of the treating tank 2 in a closed mode, an air extraction opening is arranged at the center of the top of the inverted V-shaped sealing cover 7, an air extraction pipe 8 is arranged, under the assistance of the suction force of the upper extraction pipe 8, hot water is pushed to the surface layer of soil or exposed to the surface of the soil to form visible water, one end of the extraction pipe 8 is connected with an extraction opening through a lifting pipe 17, the other end of the extraction pipe passes through the heat preservation room 1 and is connected with the water storage tank 3 through a condensation pipe 19, a water outlet pipe 21 is arranged on the upper side wall of the treatment tank 2 and is connected with the condensation pipe 19, a water inlet pipe 22 is arranged on the lower side wall of the treatment tank 2 and is connected with the water storage tank 3, the water outlet pipe 21 is positioned above the water inlet pipe 22, the bottom of the condensation pipe 19 is communicated with the middle part of the water inlet pipe 22, a water return pipe 9 communicated with the diving layer 5 and the water storage tank 3 is arranged below the water inlet pipe 22, the water storage tank 3, the water inlet pipe 22, the diving layer 5 and the water return pipe 9 jointly form a circulating water path, and an extraction pump, an air suction pump 10 is provided on the water inlet pipe 22.
The design principle is as follows: under the condition of a high water table,by combining upper extraction with lower heatingThe method promotes capillary water contained in the soil to continuously move to the upper surface of the soil, so that the movable pollutants in the soil move to the surface of the soil along with the capillary water and further separate out the surface, and then the pollutants on the surface of the soil are treated by technical means, so that the purpose of removing the pollutants can be achieved.
The heat preservation room 1 is built by hollow bricks, the outer wall of the heat preservation room 1 is wrapped by a heat insulation layer, and the distance between the top height of the heat preservation room 1 and the upper edge of the treatment pool 2 is 3 m.
The treatment tank 2 is designed by adopting a positive topography, the treatment tank 2 is a brick-built tank, and the inner wall and the bottom of the tank are both ironed by concrete and subjected to waterproof treatment. The lower layer is an artificial simulation diving space layer with the set water depth of 30 cm.
The upper part of the side wall of the diving layer 5 part of the treatment pool 2 is provided with an air vent 12, the side wall of the middle lower part of the other side of the diving layer 5 is provided with an external communicating pipe 13 (for observing the water inlet height), and the side wall of the diving layer 5 below the external communicating pipe 13 is provided with a sewage outlet 14.
A filter screen 20 is additionally arranged on the upper side wall of the treatment tank 2, and the filter screen 20 is connected with a water outlet pipe 21. The exposed visible water is generated under the action of the heating device 6, and is water which is continuously separated out from soil under the action of heat, so that a large amount of inorganic pollution and a small amount of organic pollutants are contained, a hole is formed in the side wall of the upper soil surface of the treatment tank 2, a filter screen 20 is additionally arranged on the hole and is connected with a water outlet pipe 21, an air suction pump 10 and a purifier 11 are arranged on the water outlet pipe 21, sewage separated out of the soil surface is sucked out by the air suction pump 10 and purified by the purifier 11, and the purified water flows back to the water inlet pipe 22 or the water storage tank 3 through a pipeline.
Two mounting holes 16 about being located the lateral wall of the roof 4 top of permeating water of treatment tank 2 and having seted up, add in the mounting hole 16 and be equipped with pollutant monitoring sensor, perhaps be used for the sample of borrowing soil to do the analysis, make the staff can carry out pollutant removal condition dynamic monitoring, the mounting hole 16 of seting up need use the sealing plug shutoff when not monitoring.
An air pressure and temperature and humidity sensor 18 is arranged on the inner wall of the top of the treatment pool 2. For monitoring the air pressure, temperature and humidity levels in the treatment tank 2.
The soil pollutant treatment process comprises the following steps:
the texture of the soil treated by the method is best in loam, and the method for removing pollutants comprises the following steps:
(1) and investigating the pollution cause of the pollution area, and preliminarily judging the pollution type.
(2) And (5) investigating and sampling, and analyzing and determining the range of the polluted area, the depth of the polluted soil layer and the type of the pollutants.
(3) And calculating and determining the soil borrowing range and the soil borrowing amount of the heterotopic treatment polluted soil.
(4) According to the pollution severity, the heavily polluted soil is preferentially transported to be treated in the order from heavy to light. Transporting the taken polluted soil to a treatment center, transferring the polluted soil to a treatment pool 2 which is pre-injected with water to a permeable top plate 4 of a submerged layer 5, turning over and flattening the polluted soil, and rolling the polluted soil to a compactness of 1000-plus 1200kp by adopting an iron round roller so as to ensure the communication of soil pores.
(5) And further opening a valve 15 of the water inlet, injecting water into the treatment tank 2, monitoring the rising condition of the water level of the soil, and closing the valve 15 until the water is basically wet to the surface layer of the soil.
(6) The inverted V-shaped sealing cover 7 is put down and sealed and fixed.
(7) The heating device 6 is started to heat, so that the water in the soil is gradually evaporated into water vapor, and the air humidity of the upper soil space in the treatment pool 2 reaches 100%.
(8) And opening an air pump 10 connected with the upper cover and a valve 15 at a reflux inlet at the lower end to pump the generated water vapor, purifying the water vapor, condensing the purified water vapor, and then refluxing the condensed water vapor into the submerged layer 5 at the lower part of the treatment pool 2 to supplement the water loss. Meanwhile, the pressure in the space of the treatment pool 2 is reduced, and the rising evaporation of the soil water is further accelerated.
(9) When the water is raised to separate out the soil surface, the wall side reflux inlet valve 15, the air suction pump 10 and the purifier 11 above the wall side reflux inlet valve are opened, and the recovery and purification treatment of the upper part liquid water and the recovery and utilization of the purified water are carried out.
(10) According to the pollutant precipitation condition, in the later stage of evaporation, the pollutant surface accumulation condition is monitored by a pollutant monitoring sensor. And judging whether the pollutants in the lower soil are completely transferred to the surface layer or not, and further judging whether the lower soil meets the pollutant removal standard or not.
(11) Collecting the soil which is 3-5cm in the surface layer and is rich in pollutants, and further refining. And completely taking out the standard soil below 3-5cm, transporting the standard soil back to the original site, and backfilling in layers, wherein in the backfilling process of the soil which belongs to the upper layer, some safe decomposed organic fertilizer is applied in a mixing manner so as to recover the soil fertility as soon as possible.
It should be understood that the above-described embodiments are merely preferred embodiments of the invention and the technical principles applied thereto. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, such variations are within the scope of the invention as long as they do not depart from the spirit of the invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.
Claims (8)
1. A soil pollutant removal treatment system is characterized by comprising a heat preservation room (1), a treatment pool (2) and a reservoir (3), wherein the treatment pool (2) is arranged in the heat preservation room (1), the reservoir (3) is arranged outside the heat preservation room (1), a horizontal water-permeable top plate (4) is arranged in the treatment pool (2) to divide the interior of the treatment pool (2) into an upper layer and a lower layer, the lower layer is a diving layer (5), the water-permeable top plate (4) is positioned at the lower half part of the inner side of the treatment pool (2), a heating device (6) is arranged at the bottom of the diving layer (5), an inverted V-shaped sealing cover (7) is arranged at the top of the treatment pool (2) in a closed manner, an air suction opening is formed in the center of the top of the inverted V-shaped sealing cover (7), an air suction pipe (8) is arranged right above the air suction opening, one end of the air suction pipe (8) is, the other end passes through the heat preservation room (1) and is connected with the water storage tank (3) through a condenser pipe (19), a water outlet pipe (21) is arranged on the upper side wall of the treatment tank (2) and is connected with the condenser pipe (19), a water inlet pipe (22) is arranged on the lower side wall of the treatment tank (2) and is connected with the water storage tank (3), the water outlet pipe (21) is positioned above the water inlet pipe (22), the bottom of the condenser pipe (19) is communicated with the middle part of the water inlet pipe (22), a water return pipe (9) communicated with the diving layer (5) and the water storage tank (3) is arranged below the water inlet pipe (22), the water storage tank (3) and the water inlet pipe (22, the diving layer (5) and the water return pipe (9) jointly form a circulating water path, the air suction pipe (8), the water outlet pipe (21) and the water return pipe (9) are respectively provided with an air suction pump (10) and a purifier (11), and the water inlet pipe (22) is provided with the air suction pump (10).
2. A soil pollutant removal treatment system according to claim 1, wherein the heat preservation room (1) is built by hollow bricks, the outer wall of the heat preservation room (1) is wrapped with a heat insulation layer, and the distance between the top height of the heat preservation room (1) and the upper edge of the treatment tank (2) is 3 m.
3. A soil pollutant removal treatment system according to claim 1, wherein the treatment tank (2) is of a positive topographic design, the treatment tank (2) is a brick-built tank, and the inner wall and the bottom of the tank are both ironed with concrete and are waterproofed.
4. A soil pollutant removal treatment system according to claim 1, wherein the side wall of the diving layer (5) of the treatment tank (2) is provided with an air vent (12) at the upper part, the side wall of the middle lower part at the other side of the diving layer (5) is provided with an external communicating pipe (13), and the side wall of the diving layer (5) below the external communicating pipe (13) is provided with a sewage outlet (14).
5. A soil pollutant removal treatment system according to claim 1, wherein a screen (20) is added to the upper side wall of the treatment tank (2), and the screen (20) is connected to the outlet pipe (21).
6. A soil pollutant removal treatment system according to claim 1, wherein valves (15) are provided between the purifier (11) and the filter screen (20) on the water outlet pipe (21), the water inlet pipe (22) is located at the inner and outer side parts of the heat-insulating room (1), and the water return pipe (9) is located at the inner part of the heat-insulating room (1).
7. A soil pollutant removal treatment system according to claim 1, wherein the side wall of the treatment tank (2) above the water permeable roof (4) is provided with an upper mounting hole (16) and a lower mounting hole (16), and a pollutant monitoring sensor is additionally arranged in the mounting holes (16).
8. A soil pollutant removal treatment system according to claim 1, characterised in that air pressure and temperature and humidity sensors (18) are provided on the top internal wall of the treatment basin (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911242127.3A CN111036662B (en) | 2019-12-06 | 2019-12-06 | Soil pollutant removing and treating system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911242127.3A CN111036662B (en) | 2019-12-06 | 2019-12-06 | Soil pollutant removing and treating system |
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| CN111036662A true CN111036662A (en) | 2020-04-21 |
| CN111036662B CN111036662B (en) | 2021-06-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003245648A (en) * | 2002-02-22 | 2003-09-02 | Mitsubishi Heavy Ind Ltd | Purification apparatus and method for polluted soil |
| CN205797976U (en) * | 2016-06-30 | 2016-12-14 | 北京华创天宇能源科技有限公司 | Containing organic solid waste treatment device |
| CN107520247A (en) * | 2017-09-28 | 2017-12-29 | 中国地质科学院水文地质环境地质研究所 | A kind of device and its application method that soil pollutant is removed using hot-air stripping |
| CN109482634A (en) * | 2018-11-08 | 2019-03-19 | 张锐 | A kind of integrated form prosthetic device of organic material contaminated soil |
| CN110394358A (en) * | 2019-08-07 | 2019-11-01 | 武汉轻工大学 | A kind of soil restoring device |
-
2019
- 2019-12-06 CN CN201911242127.3A patent/CN111036662B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003245648A (en) * | 2002-02-22 | 2003-09-02 | Mitsubishi Heavy Ind Ltd | Purification apparatus and method for polluted soil |
| CN205797976U (en) * | 2016-06-30 | 2016-12-14 | 北京华创天宇能源科技有限公司 | Containing organic solid waste treatment device |
| CN107520247A (en) * | 2017-09-28 | 2017-12-29 | 中国地质科学院水文地质环境地质研究所 | A kind of device and its application method that soil pollutant is removed using hot-air stripping |
| CN109482634A (en) * | 2018-11-08 | 2019-03-19 | 张锐 | A kind of integrated form prosthetic device of organic material contaminated soil |
| CN110394358A (en) * | 2019-08-07 | 2019-11-01 | 武汉轻工大学 | A kind of soil restoring device |
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