CN111872092A - Organic pollution building garbage drum elution system and drum elution method - Google Patents
Organic pollution building garbage drum elution system and drum elution method Download PDFInfo
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- CN111872092A CN111872092A CN202010759317.9A CN202010759317A CN111872092A CN 111872092 A CN111872092 A CN 111872092A CN 202010759317 A CN202010759317 A CN 202010759317A CN 111872092 A CN111872092 A CN 111872092A
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- 238000010828 elution Methods 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 16
- 238000010276 construction Methods 0.000 claims abstract description 100
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 238000004062 sedimentation Methods 0.000 claims abstract description 57
- 238000005507 spraying Methods 0.000 claims abstract description 43
- 239000007800 oxidant agent Substances 0.000 claims abstract description 30
- 238000002360 preparation method Methods 0.000 claims abstract description 28
- 239000010802 sludge Substances 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 239000010865 sewage Substances 0.000 claims abstract description 12
- 239000002699 waste material Substances 0.000 claims description 107
- 239000002689 soil Substances 0.000 claims description 44
- 230000008439 repair process Effects 0.000 claims description 43
- 239000007921 spray Substances 0.000 claims description 27
- 230000003647 oxidation Effects 0.000 claims description 22
- 238000007254 oxidation reaction Methods 0.000 claims description 22
- 239000003344 environmental pollutant Substances 0.000 claims description 20
- 239000002957 persistent organic pollutant Substances 0.000 claims description 20
- 231100000719 pollutant Toxicity 0.000 claims description 20
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical group NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 16
- 230000001590 oxidative effect Effects 0.000 claims description 16
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 230000014759 maintenance of location Effects 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 11
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- FMMWHPNWAFZXNH-UHFFFAOYSA-N Benz[a]pyrene Chemical compound C1=C2C3=CC=CC=C3C=C(C=C3)C2=C2C3=CC=CC2=C1 FMMWHPNWAFZXNH-UHFFFAOYSA-N 0.000 description 18
- 239000003814 drug Substances 0.000 description 12
- 239000003209 petroleum derivative Substances 0.000 description 10
- TXVHTIQJNYSSKO-UHFFFAOYSA-N BeP Natural products C1=CC=C2C3=CC=CC=C3C3=CC=CC4=CC=C1C2=C34 TXVHTIQJNYSSKO-UHFFFAOYSA-N 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- 238000005067 remediation Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 150000003071 polychlorinated biphenyls Chemical group 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a drum elution system and a drum elution method for organic pollution building garbage. The system comprises a roller elution tank, a circulation tank, a sedimentation tank and a spraying device; the upper part of the roller elution pool is provided with an inclined reticular roller; a spraying device is arranged right above the roller, and a nozzle is arranged at the bottom of the roller; one side of the roller at the high position is connected with a feeding system through a feeding crawler; a discharge hole is formed in the lower side of the roller; a sewage outlet of the roller elution tank is connected with a sewage inlet of the circulating tank; the sedimentation tank is arranged in the circulating tank; a sludge outlet at the bottom of the sedimentation tank is provided with a sludge pump, and the outlet of the sludge pump is connected with a sedimentation collecting pipe; one path of the circulating water outlet of the circulating pool is connected with the inlet of the spraying device, and the other path of the circulating water outlet of the circulating pool is connected with the inlet of the oxidizing agent preparation tank; the agent outlet of the oxidizing agent preparation tank is connected with the inlet of the spraying device; the roller driving shaft is connected with a driving motor through a coupling. The invention has the advantages of simple repairing process, small construction difficulty, obvious repairing effect and low cost.
Description
Technical Field
The invention belongs to the technical field of polluted site restoration, and relates to a drum elution system and a drum elution method for organic polluted building garbage.
Background
With the increasing degree of industrialization in China, the problem of soil pollution caused by industrial enterprises in China becomes more and more severe. The organic pollution site generally exists in a legacy site in the industries of chemical industry, petrifaction industry, pharmaceutical industry and the like, related pollutants comprise pesticides, persistent organic pollutants, petroleum hydrocarbon, polycyclic aromatic hydrocarbon, polychlorinated biphenyl, various organic solvents and the like, and part of sites are composite organic pollution with various pollutants coexisting. In the activities of dismantling and repairing polluted sites of the left enterprises, pollutants are remained on the surfaces of construction wastes generated by dismantling structures and hard grounds, and if the pollutants cannot be removed and repaired in time, the pollutants are diffused and transferred, the range of the polluted sites is enlarged, the pollution risk to the soil of the sites is caused by the dismantling activities, and the difficulty and the cost of repairing the polluted sites are increased.
At present, the construction waste remediation method mainly adopts spray washing and immersion washing technologies, and is often applied to construction waste polluted by heavy metals. The spray washing technology has the problems that the contact time of a washing technology medicament and construction waste is short, and attached pollutants are difficult to clean and eliminate; the heap leaching (immersion cleaning) technology has the disadvantages of complicated process, large water consumption, long repair period and unstable repair effect; the polluted construction waste is caused by being polluted by polluted soil, the two commonly used restoration technologies have limited pollutant removal effect at present, the condition of residual pollutants on the surface layer of the construction waste can occur, and the restoration effect of the construction waste seriously polluted is uncontrollable. In addition, no effective method is provided for the problem of repairing the organic pollution construction waste in the prior art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a roller elution system and a roller elution method (a repair method) for organic polluted building garbage, which have the advantages of simple repair process, small construction difficulty and good repair effect.
The purpose of the invention is realized by the following technical scheme:
the invention relates to an organic pollution building rubbish drum elution system, which comprises a drum elution tank, a reticular drum, a spraying device, a circulation tank, a sedimentation tank and an oxidation agent preparation tank, wherein the drum elution tank is arranged on the drum elution tank; the upper part of the roller elution pool is provided with a mesh roller which is obliquely arranged; a spraying device is arranged right above the reticular roller, and a nozzle is arranged at the bottom of the spraying device and can spray spraying water; the end part of one side of the net-shaped roller at the high position is connected with a feeding system through a feeding crawler; a discharge hole is formed in the end part of one lower side of the reticular roller; the upper part of the feeding system is provided with a feeding hole, and the lower part of the feeding system is fixed through a feeding system bracket; a sewage outlet of the roller elution tank is connected with a sewage inlet of the circulating tank; the sedimentation tank is arranged in the circulating tank; a sludge pump is arranged at a sludge (soil) outlet at the bottom of the sedimentation tank, and the outlet of the sludge pump is connected with the sedimentation collecting pipe; one path of the circulating water outlet of the circulating pool is connected with the inlet of the spraying device, and the other path of the circulating water outlet of the circulating pool is connected with the inlet of the oxidizing agent preparation tank; the agent outlet of the oxidizing agent preparation tank is connected with the inlet of the spraying device; the drum body of the reticular drum is provided with a plurality of meshes; the central shaft (i.e. the driving shaft) of the reticular roller is connected with a driving motor through a coupling, the roller body of the reticular roller is fixedly connected with the central shaft, and the driving motor can drive the reticular roller to rotate.
Furthermore, a sedimentation tank and a clean water tank are arranged in the circulating tank, and the sedimentation tank and the clean water tank are separated by a vertical baffle; a plurality of vertical wing plates are arranged at the upper part in the sedimentation tank; the sewage inlet of the circulating tank is arranged on one side of the sedimentation tank, and the circulating water outlet of the circulating tank is arranged on one side of the clean water tank.
Furthermore, the bottom of the sedimentation tank is provided with three sludge (soil) outlets, each sludge outlet is provided with a sludge pump, and the outlet of each sludge pump is connected with a sedimentation collecting pipe.
Furthermore, a motor blade (for stirring) driven by a rotating motor to rotate is arranged in the oxidation medicament preparation tank; the upper part of one side of the oxidation agent preparation tank is provided with a circulating water inlet, and the lower part of the other side of the oxidation agent preparation tank is provided with an agent outlet; the top of the oxidation agent preparation tank is provided with a dosing port.
Furthermore, the diameter of the mesh roller is 1200-2000mm, the length is 2500-3500mm, the diameter of the meshes is 20-50mm, and the distance between the meshes is 20-50 mm.
Furthermore, the inclination angle of the roller edge of the mesh roller and the horizontal direction is 5-15 degrees.
The invention relates to an organic pollution construction waste drum elution method (repairing method) by using the organic pollution construction waste drum elution system, which comprises the following steps: a batch of construction waste (the particle size is less than or equal to 200mm) is fed into a reticular roller arranged in a roller elution tank through a feed inlet of a feed system and a feed crawler, the reticular roller rotates in a rolling manner, a spray device above the reticular roller starts spray water for spraying, an oxidant is added into the spray water, the construction waste is rolled and collided in the reticular roller, so that soil and pollutants adhered to the construction waste are eluted and eliminated (namely repaired), and the soil with the pollutants falls into the roller elution tank along with the spray water; after the batch of construction waste is rolled, eluted and repaired (stayed) in the reticular roller for 0.5-2min, sampling and detecting small building waste remained in the reticular roller after repair; if the concentration of the target organic pollutant does not reach the standard, performing roller elution until the concentration of the target organic pollutant reaches the standard (is qualified); if the concentration of the target organic pollutants reaches the standard (is qualified), opening a valve of a discharge port at the end part of one side of the lower part of the reticular roller, discharging construction wastes which are qualified in elution from the discharge port, and conveying the collected construction wastes to a safe storage place for safe storage through a discharge crawler; after 3-5 batches of drum elution, collecting water in the drum elution pool into a circulating pool (a valve can be arranged between the drum elution pool and the circulating pool, and the valve is opened after 3-5 batches of drum elution, or a water pump can be used for pumping the water in the drum elution pool into the circulating pool); a sedimentation tank is arranged in the circulating tank, the soil deposited in the sedimentation tank is conveyed to a sedimentation collecting pipe through a sludge pump at a sludge outlet at the bottom of the sedimentation tank for collection (namely sedimentation collection), sampling detection is carried out, qualified soil is detected for safe stockpiling, unqualified soil is repaired, an oxidizing agent is added into the soil and is uniformly mixed, and the qualified soil is repaired for safe stockpiling; the water in the circulating pool, the spraying water for repairing the construction waste and the preparation of the oxidation agent in the soil repair (namely the reuse of reclaimed water).
Further, the oxidant is sodium persulfate; the mass concentration of the sodium persulfate in the spray water is controlled to be 0.01-1%.
Further, in the restoration system, the pH of the water in the circulation tank is controlled to be 8.0-9.0.
Further, the rotating speed of the roller is 10-20 r/min. The drum elution retention time is 0.5-2 min.
Further, the construction waste is detected to be 1000m per 500-3One sample of the construction waste is taken for detection.
The invention has the beneficial effects that:
compared with the prior art, the invention has the following advantages:
the drum elution system and the drum elution method for the organic polluted construction waste are suitable for the repair and treatment of the organic polluted construction waste with different pollution degrees in the repair activities of polluted sites, and have the advantages of simple repair process, small construction difficulty, obvious repair effect and low cost.
The repairing method provided by the invention is used for repairing the organic polluted construction waste in a roller elution mode, the pollutant removing effect (good repairing effect) is good, and the environmental safety of the site re-development and utilization of industrial enterprises can be effectively guaranteed; the method considers the water consumption and the restoration links in the restoration construction of the polluted site, saves the water consumption and reduces the cost.
Drawings
FIG. 1 is a flow chart of the operation of the drum-type washing and dewatering method for organically polluted construction wastes according to the present invention;
FIG. 2 is a schematic structural diagram of a drum-type washing and dewatering system for organic contaminated construction waste according to the present invention;
FIG. 3 is a schematic diagram of the top view of the drum-type washing and dewatering system for organic contaminated construction waste according to the present invention;
FIG. 4 is a schematic front view of the oxidizing agent preparation tank 5 in the present invention;
fig. 5 is a schematic front view of the circulation tank 3 according to the present invention.
In the figure: 1. roller elution pool 2, reticular roller 3, circulation pool 4, sedimentation pool 5, oxidation agent preparation tank 6, spraying device 7, spray nozzle 8, feeding crawler 9, feeding inlet 10, feeding system support 11, discharge port 12, clean water pool 13, baffle 14, sludge pump 15, sedimentation collecting pipe 16, driving motor 17, discharge crawler 18, sewage inlet 19, circulating water outlet 20, wing plate 21, rotating motor 22, motor blade 23, circulating water inlet 24, dosing port 25, agent outlet
Detailed Description
The invention is further described below with reference to the following figures and examples.
Example 1
As shown in fig. 2, fig. 3, fig. 4 and fig. 5, the drum elution system for organic contaminated construction waste of the present invention comprises a drum elution tank 1, a mesh drum 2, a circulation tank 3, a sedimentation tank 4, an oxidation agent preparation tank 5 and a spraying device 6; the upper part of the roller elution pool 1 is provided with a mesh roller 2 which is obliquely arranged; a spraying device 6 is arranged right above the reticular roller 2; the bottom of the spraying device 6 is provided with a nozzle 7 which can spray spraying water; the end part of one side of the net-shaped roller 2 at the high part is connected with a feeding system through a feeding crawler belt 8; a discharge port 11 is arranged at the end part of one lower side of the reticular roller 2; a discharging crawler belt 17 is arranged at the discharging port 11; the upper part of the feeding system is provided with a feeding hole 7, and the lower part of the feeding system is fixed by a feeding system bracket 9; the sewage outlet of the roller elution tank 1 is connected with the sewage inlet 18 of the circulating tank 3; the sedimentation tank 4 is arranged in the circulating tank 3; one path of the circulating water outlet 19 of the circulating pool 3 is connected with the inlet of the spraying device 6, and the other path of the circulating water outlet is connected with the circulating water inlet 23 of the oxidizing agent preparation tank 5; the chemical outlet 25 of the oxidizing chemical preparation tank 5 is connected to the inlet of the spray device 6. The mesh-shaped roller 2 rotates by means of the driving motor 16, the central shaft (namely, the driving shaft) of the mesh-shaped roller 2 is connected with the driving motor 16 through the coupler, the cylinder body of the mesh-shaped roller 2 is fixedly connected with the central shaft, and the driving motor 16 can drive the mesh-shaped roller 2 to rotate. The drum body of the reticular drum 2 is provided with a plurality of meshes; the diameter of the meshes is 20-50mm, and the distance between the meshes is 20-50 mm; the diameter of the mesh roller 2 is 1200-2000mm, and the length is 2500-3500 mm. The inclination angle of the roller edge of the reticular roller 2 to the horizontal direction is 5-15 degrees.
As shown in fig. 5, a sedimentation tank 4 and a clean water tank 12 are arranged in the circulation tank 3, and the sedimentation tank 4 is separated from the clean water tank 12 by a vertical baffle 13; a plurality of vertical wing plates 20 are arranged at the upper part in the sedimentation tank 4 (the wing plates 20 are suspended by supports arranged on the inner walls of the two sides of the tank and are used for sedimentation and sand removal; a sewage inlet 18 of the circulating pool 3 is arranged at one side of the sedimentation pool 4, and a circulating water outlet 19 of the circulating pool 3 is arranged at one side of the clean water pool 12; the bottom of the sedimentation tank 4 is provided with three sludge (soil) outlets, each sludge outlet is provided with a sludge pump 14, and the outlet of each sludge pump 14 is connected with a sedimentation collecting pipe 15.
As shown in fig. 4, a motor blade 22 (for stirring) is provided in the oxidizing agent preparation tank 5 and is rotated by a rotating motor 21. A circulating water inlet 23 is arranged at the upper part of one side of the oxidation medicament preparation tank 5, and a medicament outlet 25 is arranged at the lower part of the other side of the oxidation medicament preparation tank 5; the top of the oxidation medicament preparation tank 5 is provided with a medicament feeding port 24.
As shown in fig. 1, the method for eluting (repairing) the organic polluted construction waste drum by using the organic polluted construction waste drum elution system comprises the following steps: a batch of construction waste (the particle size is less than or equal to 200mm) is fed into a reticular roller 2 arranged in a roller elution tank 1 through a feed inlet 9 and a feed track 8 of a feed system, the reticular roller 2 rotates in a rolling manner, a spray device 6 above the reticular roller starts spray water for spraying, an oxidant is added into the spray water, the construction waste rolls and collides in the reticular roller 2, so that soil and pollutants adhered to the construction waste are eluted and eliminated (namely repaired), and the soil with the pollutants falls into the roller elution tank 1 along with the spray water; after the batch of construction waste is rolled, eluted and repaired (stayed) in the reticular roller 2 for 0.5-2min, sampling detection (sampling detection) is carried out on the small construction waste remained in the reticular roller 2 after the repair; if the concentration of the target organic pollutant does not reach the standard, performing roller elution until the concentration of the target organic pollutant reaches the standard (is qualified); if the concentration of the target organic pollutants reaches the standard (is qualified), opening a valve of a discharge port 11 at the end part of one side of the lower part of the reticular roller 2, discharging the construction waste which is qualified in elution from the discharge port 11, and conveying the collected construction waste to a safe storage place for safe storage through a discharge crawler 17; after 3-5 batches of drum elution, collecting water in the drum elution pool 1 to a circulating pool 3 (a valve can be arranged between the drum elution pool 1 and the circulating pool 3, and the valve is opened after 3-5 batches of drum elution, or a water pump can be used for pumping the water in the drum elution pool 1 to the circulating pool 3); a sedimentation tank 4 is arranged in the circulating tank 3, the soil deposited in the sedimentation tank 4 is conveyed to a sedimentation collecting pipe 15 through a sludge pump 14 at a sludge outlet at the bottom of the sedimentation tank 4 for collection (namely sedimentation collection), sampling detection is carried out, the qualified soil is detected for safe stockpiling, the unqualified soil is repaired, an oxidizing agent is added into the soil and is uniformly mixed, and the qualified soil is repaired for safe stockpiling; the water in the circulating pool, the spraying water for repairing the construction waste and the preparation of the oxidation agent in the soil repair (namely the reuse of reclaimed water).
The oxidant is sodium persulfate. The mass concentration of the sodium persulfate in the spray water is controlled to be 0.01-1%.
In the repairing system, the pH value of water in the circulating pool is controlled to be 8.0-9.0.
The rotating speed of the roller is 10-20 r/min. The drum elution retention time is 0.5-2 min.
The construction waste is detected to be 1000m per 500-3One sample of the construction waste is taken for detection.
Example 2
Taking the remediation of the building waste in the benzo (a) pyrene polluted area in the polycyclic aromatic hydrocarbon polluted site as an example, the remediation method of the drum elution by using the drum elution system of the organic polluted building waste of the embodiment 1 comprises the following steps:
repairing construction waste with benzo (a) pyrene concentration of 2.3mg/kg by adopting a roller elution mode, wherein the repairing method comprises the following steps: placing construction waste (the particle size is less than or equal to 200mm) in a net-shaped roller in a roller elution pool, starting spraying by an upper spraying device while the net-shaped roller rotates, adding an oxidant into spraying water, eliminating soil and pollutants adhered to the construction waste by rolling and colliding the construction waste in the roller, sampling and detecting repaired small building waste, and eluting the roller until the concentration of the target organic pollutants reaches the standard if the target organic pollutants do not reach the standard; after 3-5 batches of drum elution, the water in the pool is collected to the circulation pool. And a sedimentation tank is arranged in the circulating tank, the soil deposited in the sedimentation tank is collected and then is uniformly repaired, and water in the circulating tank is used for preparing an oxidation medicament in the building rubbish repair and soil repair.
The oxidant is sodium persulfate, the mass concentration of the sodium persulfate in the spray water is 0.05%, the pH value of the water in the repair system is controlled to be 8.0, the diameter of the reticular roller is 1500mm, the length of the reticular roller is 2500mm, the diameter of the mesh is 20mm, the distance between the meshes is 20mm, the angle between the edge of the roller and the horizontal inclination is 8 degrees, the rotating speed of the roller is 10r/min, and the elution retention time of the roller is about 1 min; construction waste detection is performed by taking one sample per 500m3 construction waste.
After the building garbage is repaired by the method, the concentration of benzo (a) pyrene in the building garbage is reduced to 0.28mg/kg from 2.3mg/kg before the repair
Example 3
Taking the remediation of the building waste in the benzo (a) pyrene polluted area in the polycyclic aromatic hydrocarbon polluted site as an example, the remediation method of the drum elution by using the drum elution system of the organic polluted building waste of the embodiment 1 comprises the following steps:
repairing construction waste with benzo (a) pyrene concentration of 11.5mg/kg by adopting a roller elution mode, wherein the repairing method comprises the following steps: placing construction waste (the particle size is less than or equal to 200mm) in a net-shaped roller in a roller elution pool, starting spraying by an upper spraying device while the net-shaped roller rotates, adding an oxidant into spraying water, eliminating soil and pollutants adhered to the construction waste by rolling and colliding the construction waste in the roller, sampling and detecting repaired small building waste, and eluting the roller until the concentration of the target organic pollutants reaches the standard if the target organic pollutants do not reach the standard; after 3-5 batches of drum elution, the water in the pool is collected to the circulation pool. And a sedimentation tank is arranged in the circulating tank, the soil deposited in the sedimentation tank is collected and then is uniformly repaired, and water in the circulating tank is used for preparing an oxidation medicament in the building rubbish repair and soil repair.
The oxidant is sodium persulfate, the mass concentration of the sodium persulfate in the spray water is 0.1%, the pH value in the water in the repair system is controlled to be 8.5, the diameter of the mesh-shaped roller is 1500mm, the length of the mesh-shaped roller is 2500mm, the diameter of a mesh hole is 20mm, the distance between the mesh holes is 20mm, the diameter of the mesh-shaped roller is 1500mm, the length of the mesh hole is 2500mm, the diameter of the mesh hole is 20mm, the distance between the mesh holes is 20mm, the angle between the edge of the roller and the horizontal inclination is 8 degrees, the rotating speed of the roller is 10 r/min; construction waste detection is performed by taking one sample per 500m3 construction waste.
After the building garbage is repaired by the method, the concentration of benzo (a) pyrene in the building garbage is reduced to 0.43mg/kg from 11.5mg/kg before the repair
Example 4
Taking the repair of the construction waste in the benzo (a) pyrene polluted area in the petroleum hydrocarbon polluted site as an example, the repair method of performing roller elution by using the roller elution system for the organic polluted construction waste of the embodiment 1 comprises the following steps:
repairing construction waste with petroleum hydrocarbon TPH (C10-40) concentration of 3450mg/kg by adopting a roller elution mode, wherein the repairing method comprises the following steps: placing construction waste (the particle size is less than or equal to 200mm) in a net-shaped roller in a roller elution pool, starting spraying by an upper spraying device while the net-shaped roller rotates, adding an oxidant into spraying water, eliminating soil and pollutants adhered to the construction waste by rolling and colliding the construction waste in the roller, sampling and detecting repaired small building waste, and eluting the roller until the concentration of the target organic pollutants reaches the standard if the target organic pollutants do not reach the standard; after 3-5 batches of drum elution, the water in the pool is collected to the circulation pool. And a sedimentation tank is arranged in the circulating tank, the soil deposited in the sedimentation tank is collected and then is uniformly repaired, and water in the circulating tank is used for preparing an oxidation medicament in the building rubbish repair and soil repair.
The oxidant is sodium persulfate, the mass concentration of the sodium persulfate in the spray water is 0.1%, the pH value in the water in the repair system is controlled to be 8.5, the diameter of the mesh-shaped roller is 1500mm, the length of the mesh-shaped roller is 2500mm, the diameter of a mesh hole is 20mm, the distance between the mesh holes is 20mm, the diameter of the mesh-shaped roller is 1500mm, the length of the mesh hole is 2500mm, the diameter of the mesh hole is 20mm, the distance between the mesh holes is 20mm, the angle between the edge of the roller and the horizontal inclination is 8 degrees, the rotating speed of the roller is 10 r/min; construction waste detection is performed by taking one sample per 500m3 construction waste.
After the construction waste is repaired by the method, the concentration of petroleum hydrocarbon TPH (C10-40) in the construction waste is reduced from 3450mg/kg before repair to 562mg/kg
Comparative example 1
Taking the repair of the construction waste in the benzo (a) pyrene polluted area in the petroleum hydrocarbon polluted site as an example, the repair method of performing roller elution by using the roller elution system for the organic polluted construction waste of the embodiment 1 comprises the following steps:
repairing construction waste with the concentration of 2942mg/kg of petroleum hydrocarbon TPH (C10-40) by adopting a roller elution mode, wherein the repairing method comprises the following steps: placing construction waste (the particle size is less than or equal to 200mm) in a net-shaped roller in a roller elution pool, starting spraying by an upper spraying device while the net-shaped roller rotates, adding no oxidant into spraying water, eliminating soil and pollutants adhered to the construction waste by rolling and colliding the construction waste in the roller, sampling and detecting repaired small building waste, and eluting by the roller until the concentration of the target organic pollutants reaches the standard if the target organic pollutants do not reach the standard; after 3-5 batches of drum elution, the water in the pool is collected to the circulation pool. And a sedimentation tank is arranged in the circulating tank, the soil deposited in the sedimentation tank is collected and then is uniformly repaired, and water in the circulating tank is used for preparing an oxidation medicament in the building rubbish repair and soil repair.
The oxidant is sodium persulfate, the mass concentration of the sodium persulfate in the spray water is 0.1%, the pH value in the water in the repair system is controlled to be 8.5, the diameter of the mesh-shaped roller is 1500mm, the length of the mesh-shaped roller is 2500mm, the diameter of a mesh hole is 20mm, the distance between the mesh holes is 20mm, the diameter of the mesh-shaped roller is 1500mm, the length of the mesh hole is 2500mm, the diameter of the mesh hole is 20mm, the distance between the mesh holes is 20mm, the angle between the edge of the roller and the horizontal inclination is 8 degrees, the rotating speed of the roller is 10 r/min; construction waste detection is performed by taking one sample per 500m3 construction waste.
Unlike example 4, in this comparative example, no oxidizing agent was added.
After the construction waste is repaired by the method, the concentration of the petroleum hydrocarbon TPH (C10-40) in the construction waste is reduced from 2942mg/kg before the repair to 1255mg/kg, and the concentration is higher than the concentration after the repair in the embodiment 4.
Comparative example 2
Taking the repair of the construction waste in the benzo (a) pyrene polluted area in the petroleum hydrocarbon polluted site as an example, the repair method of performing roller elution by using the roller elution system for the organic polluted construction waste of the embodiment 1 comprises the following steps:
repairing construction waste with petroleum hydrocarbon TPH (C10-40) concentration of 2561mg/kg by adopting a roller elution mode, wherein the repairing method comprises the following steps: placing the construction waste (the particle size is less than or equal to 200mm) in a reticular roller in a roller elution pool, starting spraying by an upper spraying device when the reticular roller does not rotate, adding an oxidant into the spraying water, sampling and detecting the repaired construction waste, and eluting by the roller until the concentration of the target organic pollutant reaches the standard if the target organic pollutant does not reach the standard; after 3-5 batches of drum elution, the water in the pool is collected to the circulation pool. And a sedimentation tank is arranged in the circulating tank, the soil deposited in the sedimentation tank is collected and then is uniformly repaired, and water in the circulating tank is used for preparing an oxidation medicament in the building rubbish repair and soil repair.
The oxidant is sodium persulfate, the mass concentration of the sodium persulfate in the spray water is 0.1%, the pH value in the water in the repair system is controlled to be 8.5, the diameter of the mesh-shaped roller is 1500mm, the length of the mesh-shaped roller is 2500mm, the diameter of a mesh hole is 20mm, the distance between the mesh holes is 20mm, the diameter of the mesh-shaped roller is 1500mm, the length of the mesh hole is 2500mm, the diameter of the mesh hole is 20mm, the distance between the mesh holes is 20mm, the angle between the edge of the roller and the horizontal inclination is 8 degrees, the rotating speed of the roller is 10 r/min; construction waste detection is performed by taking one sample per 500m3 construction waste.
Unlike example 4, in this comparative example, the mesh drum was not rotated.
After the construction waste is repaired by the method, the concentration of petroleum hydrocarbon TPH (C10-40) in the construction waste is reduced from 2561mg/kg to 1946mg/kg before the repair, and the concentration is higher than the concentration after the repair in the embodiment 4.
Claims (10)
1. A drum elution system for organic pollution building garbage is characterized by comprising a drum elution tank, a reticular drum, a spraying device, a circulation tank, a sedimentation tank and an oxidation agent preparation tank; the upper part of the roller elution pool is provided with a mesh roller which is obliquely arranged; a spraying device is arranged right above the reticular roller, and a nozzle is arranged at the bottom of the spraying device and can spray spraying water; the end part of one side of the net-shaped roller at the high position is connected with a feeding system through a feeding crawler; a discharge hole is formed in the end part of one lower side of the reticular roller; the upper part of the feeding system is provided with a feeding hole, and the lower part of the feeding system is fixed through a feeding system bracket; a sewage outlet of the roller elution tank is connected with a sewage inlet of the circulating tank; the sedimentation tank is arranged in the circulating tank; a sludge outlet at the bottom of the sedimentation tank is provided with a sludge pump, and the outlet of the sludge pump is connected with a sedimentation collecting pipe; one path of the circulating water outlet of the circulating pool is connected with the inlet of the spraying device, and the other path of the circulating water outlet of the circulating pool is connected with the inlet of the oxidizing agent preparation tank; the agent outlet of the oxidizing agent preparation tank is connected with the inlet of the spraying device; the drum body of the reticular drum is provided with a plurality of meshes; the central shaft of the reticular roller, namely the driving shaft, is connected with the driving motor through the coupler, the roller body of the reticular roller is fixedly connected with the central shaft, and the driving motor can drive the reticular roller to rotate.
2. The drum elution system for construction waste with organic pollution according to claim 1, wherein the circulation tank is provided with a sedimentation tank and a clean water tank, and the sedimentation tank and the clean water tank are separated by a vertical baffle; a plurality of vertical wing plates are arranged at the upper part in the sedimentation tank; the sewage inlet of the circulating tank is arranged on one side of the sedimentation tank, and the circulating water outlet of the circulating tank is arranged on one side of the clean water tank.
3. The organic contaminated construction waste drum elution system of claim 1, wherein the oxidation agent preparation tank is provided with a motor blade driven to rotate by a rotating motor; the upper part of one side of the oxidation agent preparation tank is provided with a circulating water inlet, and the lower part of the other side of the oxidation agent preparation tank is provided with an agent outlet; the top of the oxidation agent preparation tank is provided with a dosing port.
4. The drum-type washing and discharging system for organic contaminated construction waste as claimed in claim 1, wherein the bottom of the settling tank is provided with three sludge outlets, each sludge outlet is provided with a sludge pump, and the outlet of each sludge pump is connected with the settling and collecting pipe.
5. The drum elution system for organic contaminated construction waste as claimed in claim 1, wherein the diameter of the drum is 1200-2000mm, the length is 2500-3500mm, the diameter of the mesh is 20-50mm, and the distance between the meshes is 20-50 mm; the inclination angle of the roller edge of the reticular roller and the horizontal direction is 5-15 degrees.
6. A method for drum-washing of organically-polluted construction waste using the drum-washing system for organically-polluted construction waste according to any one of claims 1 to 5, wherein the repairing method comprises the steps of: a batch of construction waste with the particle size of less than or equal to 200mm is fed into a reticular roller arranged in a roller elution tank through a feed inlet of a feed system and a feed crawler, the reticular roller rotates in a rolling manner, a spray device above the reticular roller starts spray water for spraying, an oxidant is added into the spray water, the construction waste is rolled and collided in the reticular roller, so that soil and pollutants adhered to the construction waste are eluted and eliminated, namely, the soil and the pollutants are repaired, and the soil with the pollutants falls into the roller elution tank along with the spray water; the batch of construction waste is rolled, eluted and repaired in the reticular roller, namely stays for 0.5-2min, and then small building waste remained in the reticular roller after repair is sampled and detected; if the concentration of the target organic pollutant does not reach the standard, performing roller elution until the concentration of the target organic pollutant reaches the standard; if the concentration of the target organic pollutants reaches the standard, opening a valve of a discharge port at the end part of one lower side of the reticular roller, discharging construction waste which is qualified in elution from the discharge port, and conveying the collected construction waste to a safe storage place for safe storage through a discharge crawler; after 3-5 batches of drum elution, collecting water in a drum elution pool to a circulating pool, namely arranging a valve between the drum elution pool and the circulating pool, and opening the valve after 3-5 batches of drum elution, or pumping the water in the drum elution pool to the circulating pool by using a water pump; a sedimentation tank is arranged in the circulating tank, the soil deposited in the sedimentation tank is conveyed to a sedimentation collecting pipe through a sludge pump at a sludge outlet at the bottom of the sedimentation tank for collection, sampling detection is carried out, qualified soil is detected for safe stockpiling, unqualified soil is repaired, an oxidizing agent is added into the soil and is uniformly mixed, and the qualified soil is restored for safe stockpiling; water in the circulating pool, spraying water for repairing construction waste and preparation of oxidizing agents in soil repair.
7. The drum elution method of organically-polluted building waste as claimed in claim 6, wherein the oxidizing agent is sodium persulfate; the mass concentration of the sodium persulfate in the spray water is controlled to be 0.01-1%.
8. The drum elution method of organically-polluted construction waste as claimed in claim 6, wherein the pH of the water in the circulation tank is controlled to be 8.0-9.0.
9. The drum elution method of organic contaminated construction waste as claimed in claim 6, wherein the drum rotation speed is 10-20 r/min; the drum elution retention time is 0.5-2 min.
10. The method as claimed in claim 6, wherein the construction waste is detected at 1000m per 500-3One sample of the construction waste is taken for detection.
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