CN104525556A - Movable device and movable method for leaching composite polluted soil - Google Patents

Movable device and movable method for leaching composite polluted soil Download PDF

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Publication number
CN104525556A
CN104525556A CN201410834182.2A CN201410834182A CN104525556A CN 104525556 A CN104525556 A CN 104525556A CN 201410834182 A CN201410834182 A CN 201410834182A CN 104525556 A CN104525556 A CN 104525556A
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China
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washing
fine grained
soil
cleaning
coarse granule
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CN201410834182.2A
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CN104525556B (en
Inventor
张晓慧
董玉婧
葛芳州
王颋军
李彩斌
姚蔚
郭亮
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BEIJING ZHONGCHI GREEN ENERGY ENVIRONMENTAL TECHNOLOGY Co Ltd
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BEIJING ZHONGCHI GREEN ENERGY ENVIRONMENTAL TECHNOLOGY Co Ltd
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Abstract

The invention discloses a movable device and a movable method for leaching composite polluted soil. The device comprises a box body, and a multilevel screening leaching system, a fine particle stirring cleaning system, a coarse particle cyclone cleaning system and a large particle spiral cleaning system, which are arranged in the box body, wherein an inlet of the multilevel screening leaching system is provided with a pretreatment screening crushing device and a control device. By adopting the multilevel screening leaching system, the soil to be leached can be screened into soil particles in different particle sizes in a wet screening way, and pollutants in the soil in different particle sizes can be removed in a corresponding cleaning way. Since all systems are uniformly arranged in the box body, convenience in movement can be realized, the occupied floor area is small, and the device can be conveniently used for treating the polluted field in a small scale; the system screens the soil particles in different particle sizes, and the pollutants in the soil are respectively treated according to the distribution of the pollutants in different particle sizes, so that the treatment efficiency is improved, the treatment cost is reduced, and the adaptability to the composite polluted soil can be satisfied.

Description

The packaged type Apparatus and method for of combined contamination soil drip washing
Technical field
The present invention relates to contaminated site soil remediation field, particularly relate to a kind of packaged type Apparatus and method for of combined contamination soil drip washing.
Background technology
Soil leaching utilizes water or chemical solvent (comprising acid, alkali, surfactant or chelating agent etc.) to rinse soil, by Gravity Separation and the effect such as friction, chemical reaction, pollutant is transferred to liquid phase from solid phase of soil, soil after clean carries out reclaiming or disposing, the treated rear recovery up to standard of the liquid phase containing pollutant or discharge.This technology range of application is comparatively wide, can the inorganic or organic pollution such as remediating heavy metal, radionuclide, cyanide, polycyclic aromatic hydrocarbon, agricultural chemicals, Polychlorinated biphenyls.Be applicable to when the sandy content of contaminated soil is greater than 50% adopting elution technique to repair, and adopt when flour sand (fine silt/clay) content is more than 30% elution technique cost benefit low.Generally, when Soil leaching technique reparation earth volume is greater than the contaminated site of 5000 tons, just there is good economic benefit.
At least there is following problem in conventional soil drip washing technique: 1) drip washing operation loaded down with trivial details at present, and complete set of equipments equipment is comparatively large, and place contaminated soil scale being less than to 5000 tons does not have economic benefit; 2) be used for the soil processing single type pollutant, for the reparation of combined contamination soil, as heavy metal and organic material contaminated soil, there is certain limitation; 3) processing procedure quantities, water requirement and reagent consumption amount are huge, and cost is higher.
Summary of the invention
Based on the problem existing for above-mentioned prior art, the invention provides a kind of packaged type Apparatus and method for of combined contamination soil drip washing, can effective drip washing repairing polluted soil, convenient mobile, operating cost is low, and elute effect is good, and secondary pollution is little.
The invention provides a kind of packaged type equipment of combined contamination soil drip washing, comprising:
Casing, multi-stage screening elution circuit, fine grained stirring and washing system, coarse granule swirl washing system and bulky grain spiral cleaning system is provided with in it, described multi-stage screening elution circuit porch is provided with pretreatment sieving approach device, this pretreatment sieving approach device is located at equipment foremost, Main Function is coarse fraction and fragmentation, controls the soil particle diameter entering packaged type equipment;
Described multi-stage screening elution circuit is made up of multi-stage screening equipment and the screening elution device be located at above described multi-stage screening equipment, sieve elution device when multi-stage screening elution circuit works and drip washing is carried out to soil on multi-stage screening equipment, described multi-stage screening equipment is provided with fine grained discharging opening, coarse granule discharging opening and bulky grain discharging opening, the position of described fine grained discharging opening corresponds to the entrance of described fine grained stirring and washing system, described coarse granule discharging opening connects the entrance of described coarse granule swirl washing system, the position of described bulky grain discharging opening corresponds to bulky grain spiral cleaning system,
Described fine grained stirring and washing system and coarse granule swirl washing system bottom are equipped with deposit discharge pipe, and described fine grained stirring and washing system and coarse granule swirl washing system are equipped with bilge discharge pipe; The delivery outlet of described bulky grain spiral cleaning system is connected to outside described casing;
Also comprise the control device be located on described casing, be connected with described pretreatment sieving approach device, multi-stage screening elution circuit, fine grained stirring and washing system, coarse granule swirl washing system and bulky grain spiral cleaning system electrical respectively, control the operation of each Apparatus and system.
In the said equipment, multi-stage screening equipment adopts the multi-stage oscillating screen extension set being provided with two-layer sieve plate, wherein, the screenings discharging opening of second layer sieve plate is described fine grained discharging opening, the screenings discharging opening of ground floor sieve plate is described coarse granule discharging opening, and the oversize discharging opening of ground floor sieve plate is described bulky grain discharging opening;
Described elution device, is provided with drip washing pipeline, and this drip washing pipeline is connected with drip washing water tank and drip washing medicine-chest respectively, and described drip washing pipeline is located at above the two-layer sieve plate of described multi-stage screening equipment, and described drip washing pipeline is provided with sprinkling elution device.
In the said equipment, screening drip washing pipeline is: be responsible for by C type and pipe array structure that the some arms be connected on described supervisor that distribute are formed, and some sprinkling elution devices divide and are laid on described supervisor and each arm.
In the said equipment, fine grained stirring and washing system comprises:
Fine grained service sink, its entrance is located at below the fine grained discharging opening of described multi-stage screening elution circuit, arranges described deposit discharge pipe, pond body arranges described bilge discharge pipe bottom this fine grained service sink; Be provided with the first agitator in described fine grained service sink, described first agitator and described control device are electrically connected;
Fine grained cleaning device, be provided with fine grained detergent line, this fine grained detergent line connects fine grained cleaning Scatula and cleaning water tank respectively, described fine grained detergent line is provided with sprays fine grained cleaning device, and described fine grained detergent line and the sprinkling fine grained cleaning device on it are all located at the entrance top of described fine grained service sink.
In the said equipment, coarse granule swirl washing system comprises:
Coarse granule service sink, is located at the end of described multi-stage screening elution circuit, is connected with the coarse granule discharging opening of described multi-stage screening elution circuit, arranges described deposit discharge pipe, pond body arranges described bilge discharge pipe bottom this coarse granule service sink; Be provided with the second agitator in described coarse granule service sink, described second agitator and described cyclone are electrically connected with described control device respectively;
Deposit discharge pipe bottom described coarse granule service sink connects cyclone, and this cyclone is provided with drainpipe and discharge gate;
Coarse granule cleaning device, be provided with coarse granule detergent line, this coarse granule detergent line connects coarse granule cleaning Scatula and cleaning water tank respectively, described coarse granule detergent line is provided with sprays coarse granule cleaning device, and described sprinkling coarse granule cleaning device is in the porch of described coarse granule service sink.
In the said equipment, bulky grain spiral cleaning system comprises:
Bulky grain spiral output equipment, is located at the end of described multi-stage screening elution circuit, is connected with the bulky grain discharging opening of described multi-stage screening elution circuit, and this bulky grain spiral output equipment is provided with the described delivery outlet be connected to outside described casing;
Bulky grain cleaning device, be provided with bulky grain detergent line, clean Scatula respectively with bulky grain and clean water tank and be connected, this bulky grain detergent line is provided with sprays bulky grain cleaning device, and described sprinkling bulky grain cleaning device is in the top of described bulky grain spiral output equipment.
The said equipment also comprises: aerating system and deodoration system, described aerating system is provided with fine grained aerating pipelines and coarse granule aerating pipelines, described fine grained aerating pipelines is connected in the fine grained service sink of described fine grained stirring and washing system, and described coarse granule aerating pipelines is connected in the coarse granule service sink of described coarse granule swirl washing system;
Described deodoration system, is provided with the gas exhaust device and absorbent charcoal adsorption tank that connect successively;
Described aerating system and deodoration system, be electrically connected with described control device respectively.
The said equipment also comprises: treatment tank and the dewatering system be connected with this treatment tank, and described dewatering system is formed by connecting by sludge-tank and dehydration equipment;
Described treatment tank is connected with the bilge discharge pipe of described fine grained stirring and washing system, and is connected with the described bilge discharge pipe of coarse granule swirl washing system and the drainpipe of cyclone;
Described treatment tank is provided with the clear water return duct that the cleaning water tank that shares with bulky grain spiral cleaning system with described fine grained stirring and washing system, coarse granule swirl washing system is connected;
The sludge-tank of described dewatering system is connected with the mud discharge pipe bottom the deposit discharge pipe of described fine grained stirring and washing system and described treatment tank, and described dehydration equipment is provided with soil discharging opening and is connected to the drainpipe of described treatment tank.
The present invention also provides a kind of method of combined contamination soil drip washing, adopts packaged type equipment of the present invention, is dug out by the soil to be repaired after the foreign material of cleaning top layer, inputs described packaged type equipment and process, comprise the following steps:
Pretreatment, by the pretreatment sieving approach device of described packaged type equipment, becomes the soil particle that particle diameter is less than 200mm by the soil breaking of input;
Soil leaching sieves, and the soil particle that described pretreatment is obtained enters multi-stage screening elution circuit and carry out wet classification screening under spray state, sieves as bulky grain soil, coarse-grained soil and fine grained soil;
Soil cleans, and the described fine grained soil that screening obtains enters after fine grained stirring and washing system carries out stirring and washing and exports; The described coarse-grained soil that screening obtains enters after coarse granule swirl washing system carries out swirl washing and exports; The described bulky grain soil that screening obtains enters after bulky grain spiral cleaning system carries out thread mixing cleaning and exports.
Said method also comprises:
Air Exposure, the aerating system arranged by described packaged type equipment, in fine grained stirring and washing system and coarse granule swirl washing cleaning systems soil particle process, carries out Air Exposure to soil particle;
Gas treatment, the deodoration system arranged by described packaged type equipment is collected and processes the pernicious gas produced in cleaning process, rear discharge up to standard;
Dehydration and sewage disposal, the deposit of the treatment tank that fine grained stirring and washing system and described packaged type equipment are arranged enters dewatering system dehydration, and dewatered solids carries out stabilization processes, reaches the final disposal to pollutant; The sewage that multi-stage screening elution circuit and each purging system produce is concentrated and is entered treatment tank and process.
Beneficial effect of the present invention is: by multi-stage screening elution circuit, fine grained stirring and washing system, coarse granule swirl washing system and bulky grain spiral cleaning system are located at integrant drip washing equipment in casing, by the effect of multi-stage screening elution circuit, can while wet screening, preliminary drip washing is carried out to soil to be repaired, and screening is the soil particle of different-grain diameter, then by fine grained stirring and washing system, coarse granule swirl washing system and bulky grain spiral cleaning system, the soil of different-grain diameter is cleaned in a corresponding way.Because each systematic unity is located in casing, convenient mobile, take up an area little, the contaminated site making scale be less than 5000 tons also can be convenient to use this equipment and carry out Soil leaching.Multi-stage screening drip washing and cleaning can realize according to contamination class different, the selection different time of staying, different cleaning fluids process each several part contaminated soil respectively, therefore can improve cleaning efficiency, save medicament and water consumption, the process to compound contaminated soil can be met.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
The packaged type device structure schematic diagram that Fig. 1 provides for the embodiment of the present invention;
The packaged type equipment floor map that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the dewater unit of the packaged type equipment that Fig. 3 provides for the embodiment of the present invention;
The floor map of the dewater unit of the packaged type equipment that Fig. 4 provides for the embodiment of the present invention;
The method flow diagram of the combined contamination soil drip washing that Fig. 5 provides for the embodiment of the present invention;
In Fig. 1 to Fig. 4: 1-casing; 2-pretreatment sieving approach device; 3-multi-stage screening elution circuit; 31-fine grained discharging opening; 32 ?coarse granule discharging opening; 33 ?bulky grain discharging opening; 4-fine grained stirring and washing system; 41-fine grained service sink; 42-first agitator; The fine grained aerating pipelines of 43-aerating system; The deposit discharge pipe of 44-fine grained service sink; The bilge discharge pipe of 45-fine grained service sink; The detergent line of 46-fine grained; 47-fine grained cleaning Scatula; 5-coarse granule swirl washing system; 51-coarse granule service sink; 52-second agitator; The coarse granule aerating pipelines of 53-aerating system; The deposit discharge pipe of 54-coarse granule service sink; The bilge discharge pipe of 55-coarse granule service sink; The detergent line of 56-coarse granule; 57-coarse granule cleaning Scatula; 6-bulky grain spiral cleaning system; 61-bulky grain spiral output equipment; The detergent line of 62-bulky grain; 63-bulky grain cleaning Scatula; 7-control device; 8-cyclone; 9-cleans water tank; 10-aerating system; 11-deodoration system; 12-treatment tank; 13-dewatering system; 131-sludge-tank; 132-dehydration equipment.
Detailed description of the invention
Be clearly and completely described the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to protection scope of the present invention.
Fig. 1 is to the packaged type equipment that Figure 2 shows that a kind of combined contamination soil drip washing that the embodiment of the present invention provides, and be the modularization drip washing equipment that a kind of container-type is convenient to movement, this equipment comprises:
Casing, multi-stage screening elution circuit, fine grained stirring and washing system, coarse granule swirl washing system and bulky grain spiral cleaning system is provided with in casing, the porch of multi-stage screening elution circuit is provided with pretreatment sieving approach device, pretreatment sieving approach device is located at casing top place, top is bucket-shaped design, is convenient to pouring into of contaminated soil; Pretreatment sieving approach bottom of device is provided with breaker, can carry out fragmentation to the contaminated soil entered, to meet the requirement of packaged type equipment for soil particle diameter; Breaker can adopt double helix exrusion breaker.
Multi-stage screening elution circuit is made up of multi-stage screening equipment and the screening elution device be located at above multi-stage screening equipment, wherein, multi-stage screening equipment can adopt three grades of vibrating screen devices with two-layer sieve plate, multi-stage screening elution circuit is provided with fine grained discharging opening, coarse granule discharging opening and bulky grain discharging opening, the position of fine grained discharging opening corresponds to the entrance of fine grained stirring and washing system, the position of coarse granule discharging opening connects the entrance of coarse granule swirl washing system, and bulky grain discharging opening 23 connects the entrance of bulky grain spiral cleaning system 7; Concrete, the screenings discharging opening of the second layer sieve plate of multi-stage screening equipment is described fine grained discharging opening, and the screenings discharging opening of ground floor sieve plate is described coarse granule discharging opening, and the oversize discharging opening of ground floor sieve plate is described bulky grain discharging opening;
Elution device is provided with drip washing pipeline, and this drip washing pipeline is connected with drip washing water tank and drip washing medicine-chest respectively, and drip washing pipeline is located at above the two-layer sieve plate of described multi-stage screening equipment, and drip washing pipeline is provided with sprinkling elution device.Drip washing pipeline is: be responsible for by C type and pipe array structure that the some arms be connected on described supervisor that distribute are formed, and some sprinkling elution devices divide and are laid on described supervisor and each arm, and the screening drip washing pipeline of this pipe array structure can form even drip washing.This elution device is located at above multi-stage screening equipment, in screening process, can carry out drip washing, realize wet screening to whole soil.
Fine grained stirring and washing system and coarse granule swirl washing system bottom are equipped with deposit discharge pipe, fine grained stirring and washing system and coarse granule swirl washing system can be the conical lower portion being convenient to weight deposition, fine grained stirring and washing system and coarse granule swirl washing system are equipped with bilge discharge pipe, and bulky grain spiral cleaning system is provided with the bulky grain delivery outlet be connected to outside casing;
Also comprise the control device be located on casing, be connected with pretreatment sieving approach device, multi-stage screening elution circuit, fine grained stirring and washing system, coarse granule swirl washing system, bulky grain spiral cleaning system electrical respectively, control each system operation and by the ruuning situation of each system of on-line monitoring system Real-Time Monitoring and cleaning performance.
In the said equipment, fine grained service sink entrance is located at below the fine grained discharging opening of multi-stage screening elution circuit, arranges deposit discharge pipe bottom this fine grained service sink, and fine grained service sink body arranges bilge discharge pipe; Be provided with the first agitator in fine grained service sink, the first agitator and control device are electrically connected, and control the first agitator can realize in fine grained stirring and washing pond fine grained soil stirring and washing through control device;
Fine grained cleaning device, is provided with fine grained detergent line, and this fine grained detergent line connects fine grained cleaning Scatula and cleaning water tank respectively, and the delivery port of fine grained detergent line is located at the entrance top of fine grained service sink.
In the said equipment, coarse granule swirl washing system comprises: coarse granule service sink is located at the end of multi-stage screening elution circuit, be connected with the coarse granule discharging opening of multi-stage screening elution circuit, arrange deposit discharge pipe bottom this coarse granule service sink, pond body is provided with bilge discharge pipe; Be connected cyclone with the deposit discharge pipe bottom coarse granule service sink, this cyclone is provided with drainpipe and discharge gate, and discharge outlet connects treatment tank, discharge gate is connected to outside casing, first carrying out Separation of Solid and Liquid by arranging cyclone, the load of follow-up dehydration can be reduced, save energy consumption; In coarse granule service sink, be provided with the second agitator, the second agitator and cyclone are electrically connected with control device respectively, control the second agitator can realize coarse-grained soil swirl washing in coarse granule stirring and washing pond through control device;
Coarse granule cleaning device, be provided with coarse granule detergent line, this coarse granule detergent line connects coarse granule cleaning Scatula and cleaning water tank respectively, and coarse granule detergent line is provided with coarse granule flusher, and coarse granule flusher is in the porch at coarse granule service sink top.
In the said equipment, bulky grain spiral output equipment, is located at the end of described multi-stage screening elution circuit, is connected with the bulky grain discharging opening of multi-stage screening elution circuit, and this bulky grain spiral output equipment is provided with the delivery outlet be connected to outside casing;
Bulky grain cleaning device, is provided with bulky grain detergent line, cleans Scatula respectively and clean water tank to be connected with bulky grain, and this bulky grain detergent line is provided with bulky grain flusher, and bulky grain flusher is in the top of bulky grain spiral output equipment.Bulky grain flusher can adopt cleaning shower nozzle.
Each Scatula of above-mentioned each cleaning wash-out and shared cleaning water tank can be in a container, be divided into multiple casing as each Scatula and cleaning water tank, each casing are arranged respectively the interface connecting each detergent line.
The said equipment also comprises: aerating system and deodoration system, aerating system is provided with fine grained aerating pipelines and coarse granule aerating pipelines, fine grained aerating pipelines is connected in the fine grained service sink of fine grained stirring and washing system, and coarse granule aerating pipelines is connected in the coarse granule service sink of coarse granule swirl washing system; Deodoration system is formed by connecting by gas exhaust device and absorbent charcoal adsorption tank, and this gas exhaust device can process the pernicious gas that cleaning soil is produced, and enters after absorbent charcoal adsorption tank carries out adsorption treatment and arrange outward after the gas bleeding of gas exhaust device.
Aerating system and deodoration system are electrically connected with control device respectively; By arranging aerating system, can use according to the species selectivity of pollutant, air supporting effect can be utilized to dispose a part of pollutant not easily precipitated, saved dosing.The pernicious gas produced in washed off soil process can be effectively processed by arranging deodoration system.Aerating system and deodoration system can be located at the top of fine grained stirring and washing system tank body.
As shown in Figure 3,4, the said equipment also comprises: treatment tank and the dewatering system be connected with this treatment tank, and dewatering system is formed by connecting by sludge-tank and dehydration equipment; Treatment tank, sludge-tank all have the conical lower portion being easy to make depositions settle; Preferably, dehydration equipment can adopt band press filter dewatering machine or centrifugal dehydrator; Wherein, treatment tank is connected with the bilge discharge pipe of fine grained stirring and washing system, and is connected with the drainpipe of the cyclone of coarse granule swirl washing system; Treatment tank is provided with the clear water return duct be connected with the water tank of elution circuit; The sludge-tank of dewatering system is connected with the deposit discharge pipe of fine grained stirring and washing system and the mud discharge pipe for the treatment of tank bottom, and dehydration equipment is provided with soil discharging opening and is connected to the drainpipe for the treatment of tank.Above-mentioned treatment tank and dewatering system also can be concentrated and be located in the second casing, and then move time easy to use.
(treatment tank of different structure can be adopted according to the difference of water quality of disposing of sewage by arranging treatment tank, as multiple treatment tank, or in a treatment tank, multiple treatment region is set) and dewatering system, the leacheate produced during rehabilitating soil and cleaning fluid are processed and recycles, reduce the demand of the process water yield, secondary pollution is not caused to environment simultaneously.Corresponding different purging systems, can make different cleaning fluids enter different treatment tanks and process, reduce the intractability of sewage, contributes to reclaiming leacheate simultaneously, reduces costs.Simultaneously because soil less for sand content can be separated with water by dehydration equipment, therefore expand the scope of application of this device processes soil.
In the said equipment, aerating system, deodoration system, treatment tank and dewatering system belong to auxiliary device, can carry out as required adding, reequip or removing.
In the said equipment, between each system, all can adopt standard interface, with connection easily and fast, realize the modularization assembling of whole equipment.
Further, in the said equipment, screening plant also can adopt the multi-stage screening such as level Four, Pyatyi equipment, corresponding also can increase corresponding purging system, but three grades of screenings achieve the balance between treatment effect and equipment volume, guarantee the volume that the more convenient maintenance of equipment is relatively little, be convenient to mobile during application.
The packaged type equipment of the combined contamination soil drip washing that the embodiment of the present invention provides, owing to being a kind of removable module drip washing equipment of container-type, floor space is little, convenience is mobile, can disparate modules be selected according to demand to combine, to meet for scale 1000 tons of economic benefit requirements to the contaminated site of 5000 tons of scopes, expand the elution technique scope of application.This equipment sieves contaminated soil while drip washing, can regulate, can carry out multi-stage screening, decrease the eluent consumption for less pollution particle and water consumption, saved and used water according to the distribution situation of pollutant at different-grain diameter.Meanwhile, when processing compound pollutant, pollutant can be utilized in the different distributions situation of different-grain diameter, pollutant being carried out as much as possible separately process, raising the efficiency, reducing the consumption of medicament.Due to after elution circuit respectively corresponding different Sieving and casing be provided with purging system, can be set for different particle diameters the different time of staying, improve cleaning efficiency, save the water yield; Meanwhile, can be different according to the pollutant in different-grain diameter, add different cleaning agents targetedly, save medicament.Further, can add the stable pharmaceutical of process pollutant as required in cleaning fluid, process with cleaning fluid process contaminated soil completely, cannot be saved medicament and water consumption, expands the scope of application of drip washing device processes pollutant simultaneously.Equipment of the present invention, well solve the water existing for existing drip washing rehabilitating soil equipment and leacheate large usage quantity, take up an area large, equipment is more not easily to be shifted, process pollutant is relatively single, process soil property requires higher, does not have the problems such as effective treatment measures to the pollutant that drip washing cannot be removed completely.
As shown in Figure 5, the embodiment of the present invention also provides a kind of method of combined contamination soil drip washing, adopts the packaged type equipment of combined contamination soil drip washing of the present invention, comprises the following steps:
Pretreatment, dug out by soil to be repaired after removing place upper soll layer foreign material and super large soil particle, fragmentation becomes the soil particle that particle diameter is less than 200mm; Pretreatment, after removing place upper soll layer foreign material and super large soil particle, soil to be repaired is dug out, the packaged type equipment that the soil particle that described pretreatment is obtained enters described combined contamination soil drip washing processes, become through pretreatment system fragmentation the soil particle that particle diameter is less than 200mm, periodic cleaning can not broken large granule soil and stone;
Soil screening drip washing, described soil particle carries out wet classification screening by multi-stage screening elution circuit under the spray drip washing state of elution circuit, sieves as fine grained soil, coarse-grained soil and bulky grain soil;
Soil cleans, and sieves after fine grained stirring and washing system that the described fine grained soil that obtains enters described purging system carries out stirring and washing and exports; Sieve after coarse granule swirl washing system that the described coarse-grained soil that obtains enters described purging system carries out swirl washing and export; Sieving the described bulky grain soil that obtains entering after the bulky grain spiral cleaning system stating purging system carries out thread mixing cleaning exports;
Said method also comprises:
Air Exposure, arranges aerator, can carry out Air Exposure in cleaning process to soil particle in the fine grained stirring and washing system and coarse granule swirl washing system of purging system;
Gas treatment, is collected by the deodoration system of mobile unit and processes the pernicious gas produced in cleaning process, rear discharge up to standard;
Dehydration and sewage disposal, the deposit of fine grained stirring and washing system and treatment tank enters dewatering system dehydration, and dewatered solids carries out stabilization processes, reaches the final disposal to pollutant; The sewage that each system produces is concentrated and is entered treatment tank and process.
Concrete, the step utilizing the packaged type equipment of combined contamination soil drip washing of the present invention to repair contaminated soil is as follows:
(1) pretreatment:
Before soil remediation, first other foreign material such as upper soll layer ratchel are cleaned out place, soil to be repaired digs out by on-the-spot lease excavator, and in pretreatment system disintegrating machine after fragmentation, soil particle diameter < 200mm can enter Soil leaching system.
(2) Soil leaching:
(21) wet classification screening: after pretreatment fragmentation, particle diameter is that the soil particle of < 200mm is intended employing three grades of vibrating screen devices and soil is divided into fine grained soil average grain diameter < 20 ~ 50 μm, and coarse-grained soil average grain diameter is 50 μm ~ 6mm and bulky grain soil average grain diameter > 6mm; Be aided with spray equipment and carry out wet type screening, ejecting liquid can be clear water or other eluents, improves screening and elution efficiency; Suitable soil ratio is 5 ~ 8; According to the distribution of different pollutant in different-grain diameter soil particle, adjustable hole diameter of sieve (perforated) plate, sieves out the soil of appropriate particle size scope, the applicability of extension system and changeability.
(22) soil cleaning: soil, after three grades of screenings, carries out mixing and cleaning according to different-grain diameter respectively, specific as follows:
Fine grained soil enter fine grained purging system fine grained cleaning in carry out stirring and washing (moisture content about 95%);
Coarse-grained soil carries out stirring and washing in the coarse granule service sink of coarse granule purging system, coarse-grained soil up to standard direct output system after cyclone Separation of Solid and Liquid after cleaning;
Bulky grain soil adopts thread mixing mode, is aided with eluent sprayer apparatus, and after cleaning, bulky grain soil up to standard can direct output system;
In fine grained cleaning and coarse granule cleaning, be equipped with aerator, the strengthening cleaning of soil and the efficient removal of organic pollution can be realized, save the cost repaired simultaneously;
After being sieved by wet classification, corresponding cleaning again, can add eluent and other medicaments respectively according to the distribution of pollutant in different-grain diameter soil, make this equipment both for the soil of Single Pollution, can also be applicable to the soil of combined pollution.
Soil exit after cleaning, can be provided with the on-Line Monitor Device for pollutant, soil qualified discharge after monitoring cleaning.
(23) gas treatment: may produce pernicious gas in soil cleaning process, arranges gas exhaust device on removable elution circuit top, reaches atmospheric emission standard after adopting absorbent charcoal adsorption tank process.
(24) sewage disposal: intend adopting the treatment tank of ease of assembly or movement to carry out sewage disposal, carries out removal and the precipitation of pollutant by adding medicament and flocculant.After process, meet reuse requirement, be transferred to clear water reserviors and continue on for drip washing production.
(25) soil water desorption: moisture content, by miniature belt type filter-press dehydration or centrifugal dehydration system, is reduced to 60 ~ 80% by the precipitating sludge that fine grained soil precipitating sludge and sewage disposal system produce, realizes the concentrated of pollutant and minimizing.For the soil that pollutant is heavy metal class, need to be cured stabilization processes to mud cake, reach pollutant catabolic gene.
The packaged type equipment of the combined contamination soil drip washing of the embodiment of the present invention has is convenient to transfer, and take up an area little, the contaminated site less for scale can apply elution technique reparation equally; Arrange multi-stage screening elution circuit, different according to contamination class, the screening of different-grain diameter is carried out in convenient adjustment, processes each several part contaminated soil respectively, raises the efficiency, and saves leacheate; Can stable pharmaceutical be added, the pollutant that processing cleaning cannot process while cleaning, expand the scope of application of native system process pollutant.This equipment can select the different time of staying, different cleaning fluids for different-grain diameter, different pollutant, improves system effectiveness; Making this equipment can be suitable for the less soil of chiltern by adding dewatering system, expanding the scope of application of system process contaminated soil; By arranging aerating system, cleaning fluid can be saved;
The above; be only the present invention's preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.

Claims (10)

1. the packaged type equipment of combined contamination soil drip washing, is characterized in that, comprising:
Casing, is provided with multi-stage screening elution circuit, fine grained stirring and washing system, coarse granule swirl washing system and bulky grain spiral cleaning system in it, described multi-stage screening elution circuit porch is provided with pretreatment sieving approach device;
Described multi-stage screening elution circuit is made up of multi-stage screening equipment and the elution device be located at above described multi-stage screening equipment, described multi-stage screening equipment is provided with fine grained discharging opening, coarse granule discharging opening and bulky grain discharging opening, the position of described fine grained discharging opening corresponds to the entrance of described fine grained stirring and washing system, described coarse granule discharging opening connects the entrance of described coarse granule swirl washing system, and the position of described bulky grain discharging opening corresponds to bulky grain spiral cleaning system;
Described fine grained stirring and washing system and coarse granule swirl washing system bottom are equipped with deposit discharge pipe, and described fine grained stirring and washing system and coarse granule swirl washing system are equipped with bilge discharge pipe; The delivery outlet of described bulky grain spiral cleaning system is connected to outside described casing;
Also comprise the control device be located on described casing, be connected with described pretreatment sieving approach device, multi-stage screening elution circuit, fine grained stirring and washing system, coarse granule swirl washing system and bulky grain spiral cleaning system electrical respectively, control the operation of each Apparatus and system.
2. the packaged type equipment of combined contamination soil drip washing according to claim 1, it is characterized in that, described multi-stage screening equipment adopts the multi-stage oscillating screen extension set being provided with two-layer sieve plate, wherein, the screenings discharging opening of second layer sieve plate is described fine grained discharging opening, the screenings discharging opening of ground floor sieve plate is described coarse granule discharging opening, and the oversize discharging opening of ground floor sieve plate is described bulky grain discharging opening;
Described elution device, is provided with drip washing pipeline, and this drip washing pipeline is connected with drip washing water tank and drip washing medicine-chest respectively, and described drip washing pipeline is located at above the two-layer sieve plate of described multi-stage screening equipment, and described drip washing pipeline is provided with sprinkling elution device.
3. the packaged type equipment of combined contamination soil drip washing according to claim 2, it is characterized in that, described drip washing pipeline is: be responsible for by C type and pipe array structure that the some arms be connected on described supervisor that distribute are formed, and some sprinkling elution devices divide and are laid on described supervisor and each arm.
4. the packaged type equipment of the combined contamination soil drip washing according to any one of claims 1 to 3, is characterized in that, described fine grained stirring and washing system comprises:
Fine grained service sink, its entrance is located at below the fine grained discharging opening of described multi-stage screening elution circuit, arranges described deposit discharge pipe, pond body arranges described bilge discharge pipe bottom this fine grained service sink; Be provided with the first agitator in described fine grained service sink, described first agitator and described control device are electrically connected;
Fine grained cleaning device, be provided with fine grained detergent line, this fine grained detergent line connects fine grained cleaning Scatula and cleaning water tank respectively, described fine grained detergent line is provided with sprays fine grained cleaning device, and described fine grained detergent line and the sprinkling fine grained cleaning device on it are all located at the entrance top of described fine grained service sink.
5. the packaged type equipment of the combined contamination soil drip washing according to any one of claims 1 to 3, is characterized in that, described coarse granule swirl washing system comprises:
Coarse granule service sink, is located at the end of described multi-stage screening elution circuit, is connected with the coarse granule discharging opening of described multi-stage screening elution circuit, arranges described deposit discharge pipe, pond body arranges described bilge discharge pipe bottom this coarse granule service sink; Be provided with the second agitator in described coarse granule service sink, described second agitator and described cyclone are electrically connected with described control device respectively;
Deposit discharge pipe bottom described coarse granule service sink connects cyclone, and this cyclone is provided with drainpipe and discharge gate;
Coarse granule cleaning device, be provided with coarse granule detergent line, this coarse granule detergent line connects coarse granule cleaning Scatula and cleaning water tank respectively, described coarse granule detergent line is provided with sprays coarse granule cleaning device, and described sprinkling coarse granule cleaning device is in the porch of described coarse granule service sink.
6. the packaged type equipment of the combined contamination soil drip washing according to any one of claims 1 to 3, is characterized in that, described bulky grain spiral cleaning system comprises:
Bulky grain spiral output equipment, is located at the end of described multi-stage screening elution circuit, is connected with the bulky grain discharging opening of described multi-stage screening elution circuit, and this bulky grain spiral output equipment is provided with the described delivery outlet be connected to outside described casing;
Bulky grain cleaning device, be provided with bulky grain detergent line, clean Scatula respectively with bulky grain and clean water tank and be connected, this bulky grain detergent line is provided with sprays bulky grain cleaning device, and described sprinkling bulky grain cleaning device is in the top of described bulky grain spiral output equipment.
7. the packaged type equipment of the combined contamination soil drip washing according to any one of claims 1 to 3, it is characterized in that, also comprise: aerating system and deodoration system, described aerating system is provided with fine grained aerating pipelines and coarse granule aerating pipelines, described fine grained aerating pipelines is connected in the fine grained service sink of described fine grained stirring and washing system, and described coarse granule aerating pipelines is connected in the coarse granule service sink of described coarse granule swirl washing system;
Described deodoration system, is provided with the gas exhaust device and absorbent charcoal adsorption tank that connect successively;
Described aerating system and deodoration system, be electrically connected with described control device respectively.
8. the packaged type equipment of the combined contamination soil drip washing according to any one of claims 1 to 3, it is characterized in that, also comprise: treatment tank and the dewatering system be connected with this treatment tank, described dewatering system is formed by connecting by sludge-tank and dehydration equipment;
Described treatment tank is connected with the bilge discharge pipe of described fine grained stirring and washing system, and is connected with the described bilge discharge pipe of coarse granule swirl washing system and the drainpipe of cyclone;
Described treatment tank is provided with the clear water return duct that the cleaning water tank that shares with bulky grain spiral cleaning system with described fine grained stirring and washing system, coarse granule swirl washing system is connected;
The sludge-tank of described dewatering system is connected with the mud discharge pipe bottom the deposit discharge pipe of described fine grained stirring and washing system and described treatment tank, and described dehydration equipment is provided with soil discharging opening and is connected to the drainpipe of described treatment tank.
9. a method for combined contamination soil drip washing, is characterized in that, adopts the packaged type equipment described in any one of claim 1 to 8, is dug out by the soil to be repaired after the foreign material of cleaning top layer, inputs described packaged type equipment and process, comprise the following steps:
Pretreatment, by the pretreatment sieving approach device of described packaged type equipment, becomes the soil particle that particle diameter is less than 200mm by the soil breaking of input;
Soil leaching sieves, and the soil particle that described pretreatment is obtained enters multi-stage screening elution circuit and carry out wet classification screening under spray state, sieves as bulky grain soil, coarse-grained soil and fine grained soil;
Soil cleans, and the described fine grained soil that screening obtains enters after fine grained stirring and washing system carries out stirring and washing and exports; The described coarse-grained soil that screening obtains enters after coarse granule swirl washing system carries out swirl washing and exports; The described bulky grain soil that screening obtains enters after bulky grain spiral cleaning system carries out thread mixing cleaning and exports.
10. the method for combined contamination soil drip washing according to claim 9, is characterized in that, also comprise:
Air Exposure, the aerating system arranged by described packaged type equipment, in fine grained stirring and washing system and coarse granule swirl washing cleaning systems soil particle process, carries out Air Exposure to soil particle;
Gas treatment, the deodoration system arranged by described packaged type equipment is collected and processes the pernicious gas produced in cleaning process, rear discharge up to standard;
Dehydration and sewage disposal, the deposit of the treatment tank that fine grained stirring and washing system and described packaged type equipment are arranged enters dewatering system dehydration, and dewatered solids carries out stabilization processes, reaches the final disposal to pollutant; The sewage that multi-stage screening elution circuit and each purging system produce is concentrated and is entered treatment tank and process.
CN201410834182.2A 2014-12-26 2014-12-26 Movable device and movable method for leaching composite polluted soil Active CN104525556B (en)

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