CN112658013B - Method for in-situ disposal of building solid waste and prevention and control of horizontal migration of industrial site pollutants - Google Patents
Method for in-situ disposal of building solid waste and prevention and control of horizontal migration of industrial site pollutants Download PDFInfo
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- CN112658013B CN112658013B CN202011526826.3A CN202011526826A CN112658013B CN 112658013 B CN112658013 B CN 112658013B CN 202011526826 A CN202011526826 A CN 202011526826A CN 112658013 B CN112658013 B CN 112658013B
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Abstract
The invention discloses a method for treating building solid waste in situ and preventing and controlling horizontal migration of pollutants in an industrial site, which is characterized by dismantling a waste building in the industrial polluted site, crushing and sieving the building solid waste, and sieving the crushed material into crushed materials with different particle sizes; digging a ditch at the periphery of an industrial pollution site, stacking crushed aggregates with the particle sizes from small to large in sequence in the ditch and close to the periphery of the ditch according to the horizontal migration direction of pollutants to form a solid waste crushed aggregate layer, arranging a fixed net on the surface of the solid waste crushed aggregate layer far away from the industrial pollution site, and arranging a reaction layer outside the fixed net. The system realizes the in-situ control of the pollutants in the industrial site by using waste to treat the waste, has simple resistance control structure, convenient construction and high stability, and can effectively ensure the safety of the industrial site.
Description
Technical Field
The invention belongs to the technical field of in-situ treatment of solid wastes and pollutants, and particularly relates to a method for in-situ disposal of building solid wastes and prevention and control of horizontal migration of pollutants in an industrial field.
Background
Solid and muddy materials discarded by humans in production and domestic activities form solid wastes including municipal domestic wastes, agricultural wastes and industrial residues. The waste dam body is mainly applied to the migration of solid wastes left in an industrial field after the wastes of the industrial field are prevented and controlled, and plays a great role in environmental protection and treatment.
The core problem of waste dam body design and construction is the safety problem. The safety problem relates to the protection of people's life and property and ecological environment. China always pays attention to the problem of pollution prevention of solid wastes, and in 29 months at 2020, the seventeenth meeting of the thirteen national people's committee has approved a revised method for preventing solid wastes from polluting the environment, which is implemented from 1 day at 9 months at 2020. The 'prevention and control law' stipulates that a whole-process management system of construction waste is established, the actions of generation, collection, storage and disposal of the construction waste are standardized, comprehensive utilization is promoted, construction of construction waste disposal facilities and places is strengthened, the disposal safety is guaranteed, and the environment is prevented from being polluted. The waste industrial sites in China generally contain heavy metal, chloride ions, oxygen acid radical ions, microorganisms, organic pollutants and the like, the treatment technology for heavy metal pollution and organic pollution in many sites does not reach the standard, the treatment effect is poor, and the large-area migration of solid wastes is caused. In 2011 for 4 months, chromium slag of Luliang and Heanhui chemical engineering Limited company in Yunnan province is illegally dumped by carriers, the total amount reaches more than 5000 tons, and a large amount of livestock dies, so that the life safety of people is threatened.
The waste dam can be classified into a non-permeable dam and a permeable dam according to whether water is permeable or not. Conventional waste dams are designed as dam dams, which are generally impervious to water or partially permeable to water in order to prevent the leakage of harmful components. Seepage model tests and practices indicate that the initial dam is impervious, and the seepage line of the piled dam can escape from the elevation above the initial dam top. Therefore, the permeable dam is the most basic dam type in the initial dam and is an ideal dam type. The current method for disposing the building waste mainly aims at the treatment of heavy metal pollutants and organic pollutants (Chinese patent CN103978013B, a method for treating the building waste polluted by high-concentration heavy metal, Chinese patent CN104190692B, a method for stabilizing the building waste polluted by various heavy metals, Chinese patent CN102652953A, a method for treating the building waste polluted by chromium, Chinese patent CN105457969B, a method for harmlessly treating the building waste polluted by organic pollutants). The method mainly focuses on washing and other methods to elute and dispose heavy metals and organic wastes after the construction wastes are crushed. The method only aims at treating a single pollution source, does not consider the treatment problem of mixed pollution, and does not consider the problem of treating wastes with wastes. For this reason, it is necessary to develop a method for in-situ disposal of construction solid waste and prevention of horizontal migration of contaminants in industrial sites, which can solve the above problems.
Disclosure of Invention
The invention aims to provide a method for in-situ disposal of building solid waste and prevention and control of horizontal migration of pollutants in an industrial site.
The object of the invention is achieved by the following steps:
s1, dismantling waste buildings in the industrial pollution site, crushing the solid building waste, sieving, and screening into crushed materials with different particle sizes;
s2, digging a ditch at the periphery of the industrial pollution site, stacking crushed materials with particle sizes from small to large in sequence in the ditch and close to the periphery of the ditch according to the horizontal migration direction of pollutants to form a solid waste crushed material layer, arranging a fixed net on the surface of the solid waste crushed material layer far away from the industrial pollution site, and arranging a reaction layer outside the fixed net.
The invention has the beneficial effects that:
1. the invention utilizes the existing waste building in the industrial pollution site to be treated by local materials as a solid waste aggregate layer, and then arranges a ditch, the solid waste aggregate layer and a reaction layer at the periphery of the industrial pollution site so as to form a pollutant horizontal migration prevention and control structure, thereby preventing the residual solid waste in the industrial pollution site from migrating on one hand, and preventing and controlling the pollutants flowing along with rainwater and site seepage water on the other hand, and ensuring that the pollutants cannot diffuse outwards; the system realizes the in-situ control of the pollutants in the industrial field by using waste to treat the waste, has simple resistance control structure, convenient construction and high stability, and can effectively ensure the safety of the industrial field;
2. the reaction layer consists of the permeable reaction cylinder, the permeable reaction cylinder is convenient for sewage to permeate, and meanwhile, different reaction fillers can be flexibly filled according to different types of pollutants in an industrial field, so that various pollutants are comprehensively blocked and controlled, and secondary pollution to the environment is avoided; the permeable reaction cylinder can be conveniently taken out and the reaction filler can be conveniently replaced by matching with a sliding structure consisting of the sliding chute and the sliding rail;
3. the invention is provided with two rows of staggered permeable reaction cylinders, which not only facilitates the inflow of sewage, but also can improve the pollutant resistance and control effect; and the two rows of permeable reaction cylinders are provided with sliding structures, so that the reaction filler can be flexibly replaced according to the needs;
4. the supporting material in the reaction filler plays a supporting role, so that the functional material can be dispersed, the reaction contact area is increased, and the treatment efficiency and the utilization rate of the functional material are improved; meanwhile, the good permeability of the bearing material avoids blockage, and the normal reaction of the functional material is guaranteed;
5. the bentonite in the reaction filler plays a role in promoting zero-valent iron powder, and the bentonite and the cation surface active agent can play a synergistic role in effectively preventing and controlling heavy metals, chloride ions, oxygen acid radical ions and organic pollutants.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the permeable reaction cylinder of the present invention in a use state when pulled out;
FIG. 3 is a schematic structural view of the permeable reaction cylinder of the present invention in a use state when two rows are drawn out;
FIG. 4 is a schematic plan view of a reaction cartridge with a row of water permeable tubes according to the present invention;
FIG. 5 is a schematic plan view of the present invention with two rows of water permeable reaction cartridges;
FIG. 6 is a schematic structural view of a water-permeable reaction cylinder with a first chute on the upstream surface;
FIG. 7 is a schematic structural view of a permeable reaction cylinder with a second chute on the backside;
in the figure: 1-ditch, 2-solid waste aggregate layer, 3-fixed net, 4-reaction layer, 5-permeable reaction cylinder, 6-water inlet, 7-water outlet, 8-first chute, 9-first slide rail, 10-second chute, 11-second slide rail, and 12-industrial pollution site.
Detailed Description
The invention is further described with reference to the accompanying drawings, but the invention is not limited in any way, and any alterations or substitutions based on the teaching of the invention are within the scope of the invention.
As shown in the attached drawings 1-7, the invention comprises the following steps:
s1, dismantling waste buildings in the industrial pollution site, crushing the solid building waste, sieving, and screening into crushed materials with different particle sizes;
s2, digging a ditch 1 at the periphery of an industrial pollution site, stacking crushed aggregates with particle sizes from small to large in sequence in the ditch 1 and close to the periphery of the ditch 1 according to the horizontal migration direction of pollutants to form a solid waste crushed aggregate layer 2, arranging a fixed net 3 on one surface of the solid waste crushed aggregate layer 2 far away from the industrial pollution site, wherein the fixed net 3 plays a role in fixing the solid waste crushed aggregate layer 2, and arranging a reaction layer 4 on the outer side of the fixed net 3, wherein the fixed net 3 can be a stainless steel net.
Preferably, the S1 step is carried out to sieve into three crushed aggregates with the particle size of less than or equal to 2mm, the particle size of more than 2mm and less than or equal to 10mm, and the particle size of more than 10mm and less than or equal to 50 mm.
Preferably, the bottom of the solid waste aggregate layer 2 is embedded into a soil layer at the bottom of the ditch 1, so that the stability of the solid waste aggregate layer 2 can be enhanced, and the top of the solid waste aggregate layer 2 is 10-150 cm higher than the top of the ditch 1.
Preferably, the total thickness of the solid waste crushed material layer 2 is 100-200 cm, and the thicknesses of the three crushed materials with different particle sizes are equal.
Preferably, the pieces of smallest particle size are stacked in a sloping manner.
Preferably, the reaction layer 4 is composed of a plurality of water-permeable reaction cylinders 5 which are mutually contacted in pairs, the bottom of each water-permeable reaction cylinder 5 is of a closed structure, and reaction fillers are filled in each water-permeable reaction cylinder 5; the reaction filler passes through the top of the water-permeable reaction cylinder 5 and is filled in the water-permeable reaction cylinder 5.
Preferably, the reaction filler is obtained by uniformly mixing a supporting material and a functional material, and the mass ratio of the supporting material to the functional material is 1: 0.1 to 1; the supporting material plays a supporting role, so that the functional material can be dispersed, the reaction contact area is increased, and the treatment efficiency and the utilization rate of the functional material are improved; meanwhile, the good permeability of the bearing material avoids blockage, and the normal reaction of the functional material is guaranteed; the functional materials can be selected to be suitable for treating the pollutants according to different types of the pollutants.
Preferably, the supporting material is gravel and the functional material is bentonite, cationic surfactant, ZVI (i.e. zero valent iron, zero valent iron powder can be used).
Preferably, the lower part of the upstream surface of the water permeable reaction cylinder 5 is provided with a water inlet 6, and the upper part of the downstream surface of the water permeable reaction cylinder 5 is provided with a water outlet 7.
Preferably, the water inlet holes 6 are uniformly distributed in the lower third area of the upstream surface of the water permeable reaction cylinder 5, and the water outlet holes 7 are uniformly distributed in the upper third area of the downstream surface of the water permeable reaction cylinder 5.
Preferably, a first sliding chute 8 is arranged on the upstream surface of the water permeable reaction cylinder 5, a first sliding rail 9 is fixedly arranged on the fixed net 3 opposite to the first sliding chute 8, and the first sliding rail 9 is in sliding fit with the first sliding chute 8; when the reaction filler in the permeable reaction cylinder 5 needs to be replaced, the permeable reaction cylinder 5 is pulled out upwards, and in the pulling-out process, the first sliding chute 8 slides on the first sliding rail 9; after the reaction filler is replaced, the permeable reaction cylinder 5 is installed back to the corresponding first slide rail 9.
Preferably, there are two rows of reaction cylinders 5 that permeate water, and the dislocation set between two rows of reaction cylinders 5 that permeate water, the surface of the back of reaction cylinder 5 that permeates water that is close to the fixed net 3 corresponds with the upstream surface of reaction cylinder 5 that permeates water that is far away from the fixed net 3, sewage reacts through the first row of reaction cylinder that permeates water first, then gets into the second row of reaction cylinder that permeates water and reacts, two rows of reaction cylinders that permeate water that misplace not only are convenient for sewage to flow in, but also can improve pollutant resistance control effect, the surface of the back of reaction cylinder 5 that permeates water that is far away from the fixed net 3 is equipped with second spout 10, the inner wall of ditch 1 that second spout 10 is relative is equipped with second slide rail 11, second slide rail 11 and second spout 10 sliding fit, can upwards pull out second row reaction cylinder 5 that permeates water through the second spout 10 of reaction cylinder 5 that permeates water of second row, be convenient for change reaction filler.
Preferably, bentonite is filled between the permeable reaction cylinders 5 to increase water absorption.
The working principle and the working process of the invention are as follows: in the process that pollutants in an industrial polluted site migrate from inside to outside, the pollutants, rainwater and sewage formed by site seepage are firstly gathered in a ditch 1, and a solid waste crushed material layer 2 formed by stacking the pollutants with the particle sizes from small to large sequentially has the function of preliminarily blocking the pollutants with large volumes step by step; after the sewage penetrates through the solid waste aggregate layer 2, the sewage enters the permeable reaction cylinder 5 from the water inlet 6 of the permeable reaction cylinder 5 and reacts with the reaction filler, so that pollutants are prevented and controlled, and the treated sewage is discharged from the water outlet 7.
The present invention will be further described with reference to examples 1 to 10.
Example 1
A method for in-situ disposal of construction solid waste and prevention and control of horizontal migration of industrial site contaminants, comprising the steps of:
s1, dismantling waste buildings in the industrial pollution site, crushing the solid building waste, sieving, and screening into crushed materials with different particle sizes;
s2, digging a ditch 1 at the periphery of an industrial pollution site, stacking crushed aggregates with particle sizes from small to large in sequence in the ditch 1 and close to the periphery of the ditch 1 according to the horizontal migration direction of pollutants to form a solid waste crushed aggregate layer 2, arranging a fixed net 3 on one surface of the solid waste crushed aggregate layer 2 far away from the industrial pollution site, wherein the fixed net 3 plays a role in fixing the solid waste crushed aggregate layer 2, and arranging a reaction layer 4 on the outer side of the fixed net 3, wherein the fixed net 3 can be a stainless steel net.
Example 2
A method for in-situ disposal of construction solid waste and prevention and control of horizontal migration of industrial site contaminants, comprising the steps of:
s1, dismantling the waste buildings in the industrial pollution site, crushing the solid waste of the buildings, sieving, and dividing into three crushed materials with the particle size of less than or equal to 2mm, the particle size of more than 2mm and less than or equal to 10mm, and the particle size of more than 10mm and less than or equal to 50 mm;
s2, digging a ditch 1 at the periphery of an industrial pollution site, stacking crushed aggregates with particle sizes from small to large in sequence in the ditch 1 and close to the periphery of the ditch 1 according to the horizontal migration direction of pollutants to form a solid waste crushed aggregate layer 2, arranging a fixed net 3 on one surface of the solid waste crushed aggregate layer 2 far away from the industrial pollution site, wherein the fixed net 3 plays a role in fixing the solid waste crushed aggregate layer 2, and arranging a reaction layer 4 on the outer side of the fixed net 3, wherein the fixed net 3 can be a stainless steel net.
Example 3
A method for in-situ disposal of construction solid waste and prevention and control of horizontal migration of industrial site contaminants, comprising the steps of:
s1, dismantling the waste buildings in the industrial pollution site, crushing the solid waste of the buildings, sieving, and dividing into three crushed materials with the particle size of less than or equal to 2mm, the particle size of more than 2mm and less than or equal to 10mm, and the particle size of more than 10mm and less than or equal to 50 mm;
s2, digging a ditch 1 at the periphery of an industrial pollution site, stacking crushed aggregates with particle sizes from small to large in sequence in the ditch 1 and close to the periphery of the ditch 1 according to the horizontal migration direction of pollutants to form a solid waste crushed aggregate layer 2, burying the bottom of the solid waste crushed aggregate layer 2 into a soil layer at the bottom of the ditch 1, wherein the top of the solid waste crushed aggregate layer 2 is 10cm higher than the top of the ditch 1, arranging a fixing net 3 at one surface of the solid waste crushed aggregate layer 2, which is far away from the industrial pollution site, the fixing net 3 plays a role in fixing the solid waste crushed aggregate layer 2, and arranging a reaction layer 4 at the outer side of the fixing net 3, wherein the fixing net 3 can be a stainless steel net.
Example 4
A method for in-situ disposal of construction solid waste and prevention and control of horizontal migration of industrial site contaminants, comprising the steps of:
s1, dismantling the waste buildings in the industrial pollution site, crushing the solid waste of the buildings, sieving, and dividing into three crushed materials with the particle size of less than or equal to 2mm, the particle size of more than 2mm and less than or equal to 10mm, and the particle size of more than 10mm and less than or equal to 50 mm;
s2, digging a ditch 1 at the periphery of an industrial pollution site, stacking crushed aggregates with particle sizes from small to large in sequence in the ditch 1 and close to the periphery of the ditch 1 according to the horizontal migration direction of pollutants to form a solid waste crushed aggregate layer 2, burying the bottom of the solid waste crushed aggregate layer 2 into a soil layer at the bottom of the ditch 1, wherein the top of the solid waste crushed aggregate layer 2 is 150cm higher than the top of the ditch 1, arranging a fixed net 3 at one side of the solid waste crushed aggregate layer 2, which is far away from the industrial pollution site, wherein the fixed net 3 plays a role of fixing the solid waste crushed aggregate layer 2, arranging a reaction layer 4 at the outer side of the fixed net 3, wherein the reaction layer 4 is composed of a plurality of permeable reaction cylinders 5 which are in mutual contact with each other, the bottom of each permeable reaction cylinder 5 is of a closed structure, and reaction fillers are filled in each permeable reaction cylinder 5.
Example 5
A method for in-situ disposal of construction solid waste and prevention and control of horizontal migration of industrial site contaminants, comprising the steps of:
s1, dismantling the waste buildings in the industrial pollution site, crushing the solid waste of the buildings, sieving, and dividing into three crushed materials with the particle size of less than or equal to 2mm, the particle size of more than 2mm and less than or equal to 10mm, and the particle size of more than 10mm and less than or equal to 50 mm;
s2, digging a ditch 1 at the periphery of an industrial pollution site, stacking crushed aggregates with particle sizes from small to large in sequence in the ditch 1 and close to the periphery of the ditch 1 according to the horizontal migration direction of pollutants to form a solid waste crushed aggregate layer 2, burying the bottom of the solid waste crushed aggregate layer 2 into a soil layer at the bottom of the ditch 1, wherein the top of the solid waste crushed aggregate layer 2 is 80cm higher than the top of the ditch 1, arranging a fixed net 3 at one side of the solid waste crushed aggregate layer 2, which is far away from the industrial pollution site, wherein the fixed net 3 plays a role of fixing the solid waste crushed aggregate layer 2, arranging a reaction layer 4 at the outer side of the fixed net 3, wherein the reaction layer 4 consists of a plurality of permeable reaction cylinders 5 which are contacted with each other, the bottom of each permeable reaction cylinder 5 is of a closed structure, and reaction fillers are filled in each permeable reaction cylinder 5; the reaction filler is obtained by uniformly mixing a supporting material and a functional material, and the mass ratio of the supporting material to the functional material is 1: 0.55.
example 6
A method for in-situ disposal of construction solid waste and prevention and control of horizontal migration of industrial site contaminants, comprising the steps of:
s1, dismantling the waste buildings in the industrial pollution site, crushing the solid waste of the buildings, sieving, and dividing into three crushed materials with the particle size of less than or equal to 2mm, the particle size of more than 2mm and less than or equal to 10mm, and the particle size of more than 10mm and less than or equal to 50 mm;
s2, digging a ditch 1 at the periphery of an industrial pollution site, stacking crushed materials with the particle size from small to large in sequence in the ditch 1 and close to the periphery of the ditch 1 according to the horizontal migration direction of pollutants to form a solid waste crushed material layer 2, wherein the total thickness of the solid waste crushed material layer 2 is 100cm, the bottom of the solid waste crushed material layer 2 is embedded in a soil layer at the bottom of the ditch 1, the top of the solid waste crushed material layer 2 is 10cm higher than the top of the ditch 1, a fixed net 3 is arranged on one surface of the solid waste crushed material layer 2, which is far away from the industrial pollution site, the fixed net 3 plays a role of fixing the solid waste crushed material layer 2, a reaction layer 4 is arranged on the outer side of the fixed net 3, the reaction layer 4 is composed of a plurality of permeable reaction cylinders 5 which are mutually contacted with each other, the bottoms of the permeable reaction cylinders 5 are of closed structures, and reaction fillers are filled in the permeable reaction cylinders 5; the reaction filler is obtained by uniformly mixing a supporting material and a functional material, and the mass ratio of the supporting material to the functional material is 1: 0.1, the supporting material is gravel, the functional material is bentonite, cationic surfactant and ZVI, and the mass of the bentonite, the cationic surfactant and the ZVI is 1:1: 1.
Example 7
A method for in-situ disposal of construction solid waste and prevention and control of horizontal migration of industrial site contaminants, comprising the steps of:
s1, dismantling the waste buildings in the industrial pollution site, crushing the solid waste of the buildings, sieving, and dividing into three crushed materials with the particle size of less than or equal to 2mm, the particle size of more than 2mm and less than or equal to 10mm, and the particle size of more than 10mm and less than or equal to 50 mm;
s2, digging a ditch 1 at the periphery of an industrial pollution field, stacking crushed aggregates with particle sizes from small to large in sequence in the ditch 1 and near the periphery of the ditch 1 according to the horizontal migration direction of pollutants to form a solid waste crushed aggregate layer 2, wherein the total thickness of the solid waste crushed aggregate layer 2 is 200cm, the bottom of the solid waste crushed aggregate layer 2 is embedded in a soil layer at the bottom of the ditch 1, the top of the solid waste crushed aggregate layer 2 is 150cm higher than the top of the ditch 1, a fixed net 3 is arranged on one surface of the solid waste crushed aggregate layer 2 far away from the industrial pollution field, the fixed net 3 plays a role of fixing the solid waste crushed aggregate layer 2, a reaction layer 4 is arranged outside the fixed net 3, the reaction layer 4 consists of a plurality of water permeable reaction cylinders 5 which are mutually contacted with each other, the bottoms of the water permeable reaction cylinders 5 are of closed structures, reaction fillers are arranged in the water permeable reaction cylinders 5, water inlet holes 6 are arranged at the lower parts of the water facing surfaces of the water permeable reaction cylinders 5, the upper part of the back water surface of the permeable reaction cylinder 5 is provided with a water outlet hole 7; the reaction filler is obtained by uniformly mixing a supporting material and a functional material, and the mass ratio of the supporting material to the functional material is 1:1, the supporting material is gravel, the functional material is bentonite, cationic surfactant and ZVI, and the mass ratio of the bentonite to the cationic surfactant to the ZVI is 1:1: 1.
Example 8
A method for in-situ disposal of construction solid waste and prevention and control of horizontal migration of industrial site contaminants, comprising the steps of:
s1, dismantling the waste buildings in the industrial pollution site, crushing the solid waste of the buildings, sieving, and dividing into three crushed materials with the particle size of less than or equal to 2mm, the particle size of more than 2mm and less than or equal to 10mm, and the particle size of more than 10mm and less than or equal to 50 mm;
s2, digging a ditch 1 at the periphery of an industrial pollution site, stacking crushed aggregates with particle sizes from small to large in sequence in the ditch 1 and close to the periphery of the ditch 1 according to the horizontal migration direction of pollutants to form a solid waste aggregate layer 2, wherein the total thickness of the solid waste aggregate layer 2 is 150cm, the bottom of the solid waste aggregate layer 2 is embedded in a soil layer at the bottom of the ditch 1, the top of the solid waste aggregate layer 2 is 80cm higher than the top of the ditch 1, a fixed net 3 is arranged on one side of the solid waste aggregate layer 2 away from the industrial pollution site, the fixed net 3 plays a role of fixing the solid waste aggregate layer 2, a reaction layer 4 is arranged on the outer side of the fixed net 3, the reaction layer 4 is composed of a plurality of permeable reaction cylinders 5 which are mutually contacted with each other, the bottom of each permeable reaction cylinder 5 is of a closed structure, reaction fillers are filled in each permeable reaction cylinder 5, water inlet holes 6 are arranged at the lower part of the water inlet surface of each permeable reaction cylinder 5, the upper part of the back water surface of the water permeable reaction cylinder 5 is provided with a water outlet hole 7, the water facing surface of the water permeable reaction cylinder 5 is provided with a first sliding chute 8, a first sliding rail 9 is fixedly arranged on the fixed net 3 opposite to the first sliding chute 8, and the first sliding rail 9 is in sliding fit with the first sliding chute 8; the reaction filler is obtained by uniformly mixing a supporting material and a functional material, and the mass ratio of the supporting material to the functional material is 1: 0.55, the supporting material is gravel, the functional material is bentonite, cationic surfactant and ZVI, and the mass ratio of the bentonite to the cationic surfactant to the ZVI is 1:1: 1.
Example 9
A method for in-situ disposal of construction solid waste and prevention and control of horizontal migration of industrial site contaminants, comprising the steps of:
s1, dismantling the waste buildings in the industrial pollution site, crushing the solid waste of the buildings, sieving, and dividing into three crushed materials with the particle size of less than or equal to 2mm, the particle size of more than 2mm and less than or equal to 10mm, and the particle size of more than 10mm and less than or equal to 50 mm;
s2, digging a ditch 1 at the periphery of an industrial pollution site, stacking crushed aggregates with the particle size from small to large in sequence in the ditch 1 and close to the periphery of the ditch 1 according to the horizontal migration direction of pollutants to form a solid waste aggregate layer 2, wherein the total thickness of the solid waste aggregate layer 2 is 100cm, the bottom of the solid waste aggregate layer 2 is embedded in a soil layer at the bottom of the ditch 1, the top of the solid waste aggregate layer 2 is 10cm higher than the top of the ditch 1, a fixed net 3 is arranged on one side of the solid waste aggregate layer 2, which is far away from the industrial pollution site, the fixed net 3 plays a role of fixing the solid waste aggregate layer 2, a reaction layer 4 is arranged on the outer side of the fixed net 3, the reaction layer 4 consists of a plurality of permeable reaction cylinders 5 which are mutually contacted with each other, the bottom of the permeable reaction cylinders 5 is of a closed structure, reaction fillers are filled in the permeable reaction cylinders 5, and water inlet holes 6 are arranged at the lower parts of the water facing surfaces of the permeable reaction cylinders 5, the upper part of the back water surface of the water permeable reaction cylinder 5 is provided with a water outlet hole 7, the water facing surface of the water permeable reaction cylinder 5 is provided with a first sliding chute 8, a first sliding rail 9 is fixedly arranged on the fixed net 3 opposite to the first sliding chute 8, and the first sliding rail 9 is in sliding fit with the first sliding chute 8; the permeable reaction cylinders 5 are arranged in two rows, the two rows of permeable reaction cylinders 5 are arranged in a staggered manner, the back water surface of the permeable reaction cylinder 5 close to the fixed net 3 corresponds to the upstream surface of the permeable reaction cylinder 5 far away from the fixed net 3, the back water surface of the permeable reaction cylinder 5 far away from the fixed net 3 is provided with a second chute 10, the inner wall of the ditch 1 opposite to the second chute 10 is provided with a second slide rail 11, and the second slide rail 11 is in sliding fit with the second chute 10; the reaction filler is obtained by uniformly mixing a supporting material and a functional material, and the mass ratio of the supporting material to the functional material is 1: 0.1, the supporting material is gravel, the functional material is bentonite, cationic surfactant and ZVI, and the mass ratio of the bentonite to the cationic surfactant to the ZVI is 1:1: 1.
Example 10
A method for in-situ disposal of construction solid waste and prevention and control of horizontal migration of industrial site contaminants, comprising the steps of:
s1, dismantling the waste buildings in the industrial pollution site, crushing the solid waste of the buildings, sieving, and dividing into three crushed materials with the particle size of less than or equal to 2mm, the particle size of more than 2mm and less than or equal to 10mm, and the particle size of more than 10mm and less than or equal to 50 mm;
s2, digging a ditch 1 at the periphery of an industrial pollution site, stacking crushed aggregates with particle sizes from small to large in sequence in the ditch 1 and close to the periphery of the ditch 1 according to the horizontal migration direction of pollutants to form a solid waste aggregate layer 2, wherein the total thickness of the solid waste aggregate layer 2 is 200cm, the bottom of the solid waste aggregate layer 2 is embedded in a soil layer at the bottom of the ditch 1, the top of the solid waste aggregate layer 2 is higher than the top of the ditch 1 by 150cm, a fixed net 3 is arranged on one side of the solid waste aggregate layer 2, which is far away from the industrial pollution site, the fixed net 3 plays a role of fixing the solid waste aggregate layer 2, a reaction layer 4 is arranged on the outer side of the fixed net 3, the reaction layer 4 consists of a plurality of permeable reaction cylinders 5 which are mutually contacted with each other, the bottom of the permeable reaction cylinders 5 is of a closed structure, reaction fillers are filled in the permeable reaction cylinders 5, and water inlet holes 6 are arranged at the lower parts of the water facing surfaces of the permeable reaction cylinders 5, the upper part of the back surface of the water permeable reaction cylinder 5 is provided with a water outlet hole 7, the water facing surface of the water permeable reaction cylinder 5 is provided with a first chute 8, a first slide rail 9 is fixedly arranged on the fixed net 3 opposite to the first chute 8, and the first slide rail 9 is in sliding fit with the first chute 8; the permeable reaction cylinders 5 are arranged in two rows, the two rows of permeable reaction cylinders 5 are arranged in a staggered manner, the back water surface of the permeable reaction cylinder 5 close to the fixed net 3 corresponds to the upstream surface of the permeable reaction cylinder 5 far away from the fixed net 3, the back water surface of the permeable reaction cylinder 5 far away from the fixed net 3 is provided with a second chute 10, the inner wall of the ditch 1 opposite to the second chute 10 is provided with a second slide rail 11, the second slide rail 11 is in sliding fit with the second chute 10, and bentonite is filled between the permeable reaction cylinders 5; the reaction filler is obtained by uniformly mixing a supporting material and a functional material, and the mass ratio of the supporting material to the functional material is 1:1, the supporting material is gravel, the functional material is bentonite, cationic surfactant and ZVI, and the mass ratio of the bentonite to the cationic surfactant to the ZVI is 1:1: 1.
Claims (8)
1. A method for in-situ disposal of construction solid waste and prevention and control of horizontal migration of industrial site contaminants, characterized by comprising the steps of:
s1, dismantling waste buildings in the industrial pollution site, crushing the solid building waste, sieving, and screening into crushed materials with different particle sizes;
s2, digging a ditch (1) at the periphery of the industrial pollution site, stacking crushed aggregates with the particle sizes from small to large in sequence in the ditch (1) and close to the periphery of the ditch (1) according to the horizontal migration direction of pollutants to form a solid waste aggregate layer (2), arranging a fixed net (3) on one surface of the solid waste aggregate layer (2) far away from the industrial pollution site, and arranging a reaction layer (4) on the outer side of the fixed net (3);
the reaction layer (4) is composed of a plurality of water-permeable reaction cylinders (5) which are contacted with each other in pairs, the bottom of each water-permeable reaction cylinder (5) is of a closed structure, and reaction fillers are filled in each water-permeable reaction cylinder (5); the upstream face of reaction cylinder (5) permeates water is equipped with first spout (8), sets firmly first slide rail (9) on fixed network (3) that first spout (8) are relative, first slide rail (9) and first spout (8) sliding fit.
2. The method of in situ disposal of solid waste materials from construction and prevention of horizontal migration of contaminants from industrial sites as claimed in claim 1, wherein the step of S1 comprises screening three particles having a particle size of 2mm or less, a particle size of 2mm or more and 10mm or less, and a particle size of 10mm or more and 50mm or less.
3. The method for in-situ disposal of solid waste materials from buildings and prevention and control of horizontal migration of pollutants in industrial sites according to claim 1, wherein the bottom of the solid waste aggregate layer (2) is buried in the soil layer at the bottom of the trench (1), and the top of the solid waste aggregate layer (2) is 10-150 cm higher than the top of the trench (1).
4. The method for in-situ disposal of construction solid waste and prevention and control of horizontal migration of industrial site contaminants of claim 1, wherein the reactive filler is obtained by uniformly mixing a supporting material and a functional material, and the mass ratio of the supporting material to the functional material is 1: 0.1 to 1.
5. The method of in situ disposal of solid waste materials from construction and prevention of horizontal migration of industrial site contaminants of claim 4 wherein said supporting material is gravel and said functional material is bentonite clay, cationic surfactant, ZVI.
6. The method for in-situ disposal of construction solid waste and prevention and control of horizontal migration of industrial site contaminants according to claim 1, wherein the lower part of the water-permeable reaction cylinder (5) facing the water surface is provided with a water inlet hole (6), and the upper part of the water-permeable reaction cylinder (5) facing the water surface is provided with a water outlet hole (7).
7. The method for in-situ disposal of construction solid waste and prevention and control of horizontal migration of industrial site contaminants according to claim 1, wherein the two rows of water permeable reaction cylinders (5) are arranged in a staggered manner, the back surface of the water permeable reaction cylinder (5) close to the fixed net (3) corresponds to the front surface of the water permeable reaction cylinder (5) far away from the fixed net (3), the back surface of the water permeable reaction cylinder (5) far away from the fixed net (3) is provided with a second chute (10), the inner wall of the trench (1) opposite to the second chute (10) is provided with a second slide rail (11), and the second slide rail (11) is in sliding fit with the second chute (10).
8. The method for the in-situ disposal of construction solid waste and the prevention of horizontal migration of industrial site contaminants according to claim 1, wherein bentonite is filled between the water permeable reaction cartridges (5).
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