CN207288345U - A kind of concentrated combustion formula original position thermal desorption prosthetic device for contaminated site - Google Patents

Abstract

The utility model discloses a kind of concentrated combustion formula original position thermal desorption prosthetic device for contaminated site, includes burning heat transfer and waste heat recovery unit, extracting condensation and gas-liquid separation unit, subsurface flow control unit, soil gas control unit, exhaust gas treatment unit, treatment unit for waste water.Burning heat transfer and waste heat recovery unit include hot-blast stove, gas-gas heat exchanger, air blower, air-introduced machine, exhaust tube, heating gang of wells.Extracting condensation and gas-liquid separation unit include extracting gang of wells, heat exchange condensing plant, gas-liquid separation equipment, deentrainment tower, vacuum pump.Subsurface flow control unit is water-stop curtain.Soil gas control unit is concrete layer.Exhaust gas treatment unit includes adsorption plant and wind turbine.Treatment unit for waste water includes regulating reservoir, combination pond, sand filtration apparatus, carbon filtration equipment, discharge bay.Concentrated combustion formula original position thermal desorption prosthetic device provided by the utility model for contaminated site, can overcome the deficiencies in the prior art, obtain more preferable repairing effect.

Description

A kind of concentrated combustion formula original position thermal desorption prosthetic device for contaminated site

Technical field

It the utility model is related to a kind of contaminated site prosthetic device, and in particular, to a kind of concentration for contaminated site Combustion-type original position thermal desorption prosthetic device.

Background technology

It is organic that thermal desorption (Thermal Desorption) technology is widely portable to volatile organic matter, half volatile Thing, the original position of petroleum hydrocarbon or mercury pollution place or showering.The technology is by way of directly or indirectly heating, by dirt Dye soil and/or underground water are heated to the boiling point close to even more than target contaminant, are held by control system temperature and high temperature The continuous time selectively promotes target contaminant to desorb, gasify, volatilize, decompose or increase its mobility, makes target contaminant Separate, remove with soil media, so as to fulfill the purpose of contaminated site reparation.

Thermal desorption recovery technique in situ can be implemented in contaminated site original position, without carrying out the work such as excavating to contaminated soil Industry, is mainly made of place In Situ Heating unit, pollutant extracting with recovery unit and waste water/exhaust gas treatment unit etc..Its Middle place In Situ Heating unit is the core of thermal desorption technology in situ, it passes through in the venue by electric energy, thermal energy or chemical energy Generated heat etc. various forms of energy with In-situ resistance, in-situ heat conduction heating or situ steam after electric heating conversion or burning heat production The modes such as injected with heated convert or are transferred to contaminated site, contaminated soil and/or underground water is progressively heated up and reach target Repair temperature and maintain certain time, to remove so as to which soil media of the target contaminant from script preservation is separated.In high temperature Under the conditions of extraction system can by target contaminant by the form of underground water or SOIL GAS from underground pollution zone-transfer to ground Recycled, or pass through qualified discharge after waste water/exhaust gas treatment unit processing.Pollution level and field of the technology to pollutant Ground geology and hydrogeologic condition are insensitive, can effectively repair the Pollution Field of heavily contaminated, geology and complicated hydrogeological conditions Ground.

At present, thermal desorption recovery technique in situ at home contaminated site repair in engineer application it is still relatively limited, limit The main reason for making its popularization and application be the provisional extensive electricity consumption in part place be not easy to obtain, vapor injection heating desorption Technology is vulnerable to that the limitation of Geological condition and the target temperature upper limit, energy cost needed for In Situ Heating be higher, place underground The soil gas that current are difficult to control, are desorbed out is not easy effectively trapping and pollution environment of escaping, the pollutant that extracts are condensed back to Receive it is less efficient, produce high humility exhaust gas is disposable, the complicated all difficulties such as more intractable of wastewater property.

Utility model content

The purpose of this utility model is to provide a kind of contaminated site prosthetic device, and it is organic to be primarily adapted for use in various volatility Thing, semi-volatile organic matter, petroleum hydrocarbon or the soil in mercury pollution place underground water in-situ immobilization engineering, can overcome existing original Position thermal desorption recovery technique existing deficiency in practical applications.

In order to achieve the above object, the utility model provides a kind of concentrated combustion formula in-situ heat for contaminated site and takes off Attached prosthetic device, wherein, the device include burning heat transfer and waste heat recovery unit, extracting condensation and gas-liquid separation unit, Subsurface flow control unit, soil gas control unit, exhaust gas treatment unit, treatment unit for waste water and pipeline；The combustion Burn heat transfer and waste heat recovery unit includes hot-blast stove, gas-gas heat exchanger, air blower, air-introduced machine, exhaust tube and heating gang of wells；Institute The extracting condensation stated and gas-liquid separation unit include extracting gang of wells, heat exchange condensing plant, gas-liquid separation equipment, deentrainment tower and true Sky pump；The extracting gang of wells includes some extracting well casings, and the extracting well casing is included and is vertically mounted in contaminated site Some vertical shaft type extraction wells, and some horizontal well formula extraction wells being horizontally arranged in Polluted area topsoil；The pumping Carry opened up respectively on well casing it is some along the evenly spaced sieve aperture in well casing direction or screen slot；The subsurface flow control unit includes It is arranged on the water-stop curtain for the Polluted area periphery for needing to repair；The soil gas control unit includes and is arranged on Pollution Field The concrete layer of covering Polluted area on the ground on ground；The exhaust gas treatment unit includes adsorption plant and wind turbine；It is described Treatment unit for waste water include the regulating reservoir set gradually, combination pond, sand filtration apparatus, carbon filtration equipment and discharge bay.

The above-mentioned concentrated combustion formula original position thermal desorption prosthetic device for contaminated site, wherein, burning heat transfer With waste heat recovery unit, its hot-blast stove is equipped with combustion air inlet, secondary air inlet and hot-blast outlet；The gas-gas heat exchanger Exported equipped with hot wind inlet, cold wind import, exhaust outlet and Secondary Air, Secondary Air outlet passes through the two of pipeline and hot-blast stove Secondary wind inlet connection；The heating gang of wells includes some heated wells, and the heated well is equipped with hot-wind inlet and hot wind is arranged Mouthful, the hot-wind inlet of heated well is connected by the hot-blast outlet of pipeline and hot-blast stove respectively, and hot wind row's mouth of heated well leads to respectively Piping is connected with exhaust tube or gas-gas heat exchanger hot wind inlet, and the exhaust outlet of gas-gas heat exchanger connects also by pipeline and exhaust tube Connect；The exhaust tube is connected with air-introduced machine；The air blower includes combustion fan and air intake blower fan, the combustion fan At the combustion air inlet of hot-blast stove, the air intake blower fan is installed at the cold wind import of gas-gas heat exchanger.Hot wind Valve is equipped with the combustion air inlet and secondary air inlet of stove, being equipped with pressure sensitive at hot-blast outlet pops one's head in.The hot wind Stove is centralized hot-blast stove, using natural gas, oil gas or diesel oil etc. as fuel, produces high-temperature hot-air by burning fuel and makees For In Situ Heating heat source.Burner, combustion chamber, mixing chamber, that is, burner hearth are equipped with the hot-blast stove.For larger heat Wind furnace, combustion air input hot-blast stove from combustion air inlet in proportion according to fuel feed by air blower, pass through burner Fuel combustion is produced into high-temperature hot-air；For small-sized air heating furnace, combustion air runs the negative pressure produced by system end air-introduced machine Combustion air inlet is sucked, air imbibed quantity is adjusted manually by adjusting the valve opening size at combustion air inlet.It is fresh The negative pressure that Secondary Air runs to produce in the mixing chamber of hot-blast stove by system end air-introduced machine is sucked from secondary air inlet, or Hot-blast stove is directly sent into by gas-gas heat exchanger using special air blower.The hot blast temperature come out of the stove from hot-blast outlet passes through adjusting The mode of valve opening size is adjusted at burner load or adjusting secondary air inlet.The pressure set at hot-blast outlet Inductive probe, when detecting pressure herein higher than the negative pressure value set, burner can be automatically closed, when pressure herein is less than setting Burner can automatic start during the negative pressure value put.The hot wind that hot-blast stove produces is complete by installation heated well in the venue and soil Into indirect heat exchange, the hot wind for completing heat exchange is discharged into air by the effect of air-introduced machine from exhaust tube, or enters and be installed on hot-blast stove The gas-gas heat exchanger of secondary air inlet front end, air is discharged after being exchanged heat with fresh cold wind by exhaust tube again.Each hot wind Stove is connected with a heated well or several heated wells respectively；Between several heated wells being connected with same hot-blast stove simultaneously Connection, or be arranged to connect between adjacent heated well.I.e., it is possible to the configuration shape of centralized hot-blast stove and heating gang of wells is flexibly set Formula, including a hot-blast stove are equipped with a heated well；Or a hot-blast stove is equipped with multiple heated wells, multiple heated wells and through transport OK, and by valve regulated the hot blast rate for entering each heated well is as balanced as possible；Adjacent heated well also can series operation, high temperature Hot wind is re-fed into after another heated well continues heat exchange after a heated well finishes changing heat and discharges again.

The above-mentioned concentrated combustion formula original position thermal desorption prosthetic device for contaminated site, wherein, the heated well, its To subsurface, vertical or it is obliquely installed, is arranged in the horizontal plane with triangle or square arrangement, group from ground in contaminated site Into heating gang of wells；The depth of heated well is more than the depth for the Polluted area for needing to repair.Preferably, the well spacing of heated well is in 1- Between 3m, the depth ratio of heated well needs the depth depth 0.3-0.5m in the target stains region repaired.The heated well is interior Outer concentric tubes structure, comprising outer tube and inner tube, leaves annular gap, inner tube between the madial wall of outer tube and the lateral wall of inner tube Bottom be higher than outer pipe bottom, outer pipe bottom is equipped with bottom cover, and interior bottom of the tube is not set the opening of bottom cover；Preferably, outer tube caliber 100-140cm, inner tube diameter 75-90cm；Interior bottom of the tube and the spacing of outer pipe bottom are 20-30cm.The outer tube is installed on It is pre-set by ground native hole downwards, being left between the lateral wall of outer tube and native hole madial wall between ring-type in contaminated site Gap, is filled with filler in it.Preferably, it is equipped between the lateral wall of outer tube and native hole madial wall between the ring-type that thickness is 10-20cm Gap, the filler are quartz sand or haydite, are popped one's head in the filler equipped with some highly different thermocouple temperature measurements.That is, There is the gap of 10-20cm when heated well is installed between the native hole of outer tube and probing, directly insert quartz sand, or insert haydite. Thermocouple temperature measurement is set to pop one's head at different depth between filler.Be above the ground level at the top of heated well, the top of heated well be equipped with The hot-wind inlet of hot-blast stove connection；Heated well be above the ground level part side wall be equipped with hot wind row mouth.Hot wind row's mouth is set There is hot wind regulating valve.High-temperature hot-air introduces heated well by the suction function of system end air-introduced machine and is heated, high-temperature hot-air The well casing bottom of heated well is first from top to bottom sent into through inner tube, then by the gap between inner tube and outer tube with from bottom to top turning back back Face, from hot wind row's mouth discharge after the hot wind regulating valve of a side.When filler temperature reaches a higher set temperature When can turn or close automatically the hot wind control valve opening of heated well end down by electric-control system；When filler temperature reaches one Relatively low set temperature can be automatically turned on or be tuned up hot wind control valve opening by electric-control system.The electric-control system is preferred For STM32F407 microcontrollers.

The above-mentioned concentrated combustion formula original position thermal desorption prosthetic device for contaminated site, wherein, extracting condensation And gas-liquid separation unit, it extracts gang of wells and is connected by pipeline with heat exchange condensing plant, and it is cold that gas-liquid separation equipment is arranged on heat exchange The rear end of solidifying equipment, deentrainment tower and vacuum pump are set gradually after heat exchange condensing plant and gas-liquid separation equipment；Described changes Hot condensing plant includes evaporation type air cooling tower and gas-liquid heat-exchange；The gas-liquid separation equipment is inertial gas-liquid separator；It is logical The fixed gas crossed after gas-liquid separation equipment and heat exchange condensing plant condensation separation enters vacuum pump, again through vacuum pump after deentrainment tower Follow-up exhaust gas treatment unit is sent into, the condensed fluid after separation passes through pipeline to treatment unit for waste water；The extraction well Group, the secondary air inlet that its soil gas extracted can directly be sent into hot-blast stove by pipeline carries out burning processing, or passes through The secondary air inlet of hot-blast stove is fed gas into after heat exchange condensing plant and gas-liquid separation equipment condensation recovery section pollutant again Carry out burning processing, or after heat exchange condensing plant and gas-liquid separation equipment condensation recovery section pollutant again by exhaust gas at Qualified discharge after reason cell processing.Exchange heat condensing plant and gas-liquid separation equipment composition multi-stage condensing separation equipment；Described is more Level condensation separation equipment, is sequentially connected between its is at different levels；The first order includes the pipeline of connection extracting gang of wells and after pipeline An inertial gas-liquid separator；The second level includes evaporation type air cooling tower and an inertia gas after evaporation type air cooling tower Liquid/gas separator；The third level includes gas-liquid heat-exchange and an inertial gas-liquid separator after gas-liquid heat-exchange.Namely Say, multi-stage condensing separation equipment, nature of the first order condensation separation using air to ground extraction well pipe can be flexibly set Cooling effect, is followed by an inertia-type gas-liquid separator i.e. level-one moisture trap；Second level condensation separation is with evaporation type air cooling Tower is followed by an inertia-type gas-liquid separator i.e. two level moisture trap as heat exchange condensing plant；Third level condensation separation with For gas-liquid heat-exchange as heat exchange condensing plant, the low temperature chilled water provided by the use of handpiece Water Chilling Units is followed by an inertia as refrigerant Formula gas-liquid separator, that is, three-level moisture trap.Vacuum pump use the dry type with certain overcurrent heating ability claw or Roots type vacuum pump, has certain overcurrent heating ability, vacuum pump outlet gas temperature slightly raises, but can substantially reduce The relative humidity of gas, helps to improve the adsorption efficiency of subsequent adsorbtion equipment.The deentrainment tower is equipped with mesh mist eliminator, folding Any one in flowing plate demister or rotational flow plate defroster.Deentrainment tower is mainly used for removing the tiny liquid of on-condensible gas remnants Drop, further reduces the processing load of subsequent adsorbtion unit, improves activated carbon adsorption efficiency, while protect vacuum pump from liquid Corrosion.The gas access of deentrainment tower and activated carbon adsorber is all located at lower part, and gas vent is located at tower top.The extracting gang of wells It is that will extract well casing by extracting manifold to be connected with multi-stage condensing separation equipment, forms the extracting gang of wells；Vertical shaft type extracts Well and horizontal well formula extraction well vertical interlaced are distributed in in a piece of contaminated site and covering whole Polluted area.Extracting gang of wells passes through The suction that the vacuum pump of cell end produces carries out vacuum extraction.

The above-mentioned concentrated combustion formula original position thermal desorption prosthetic device for contaminated site, wherein, the extracting gang of wells, If its vertical shaft type extraction well is separately mounted to pre-set by ground dry ground hole downwards in contaminated site；Vertical shaft type extracts Well arranges that well spacing is 1-3m in horizontal layout in the form of triangle or square；The well casing of vertical shaft type extraction well Bentonite to ground is filled filled with quartz sand between lateral wall and the madial wall in native hole and at the top of quartz sand and carries out sealing of hole；Stone The packed height of sand and sieve aperture on the well casing of vertical shaft type extraction well or the setting span scope of screen slot are basically identical.Vertical shaft type is taken out Carry opened up on the well casing of well it is some along the evenly spaced sieve aperture in well casing direction or screen slot；The setting of sieve aperture or screen slot on well casing across Degree vertically covers whole Polluted area and is equipped with bottom plate, base plate thickness than Polluted area bottom depth 0.3-0.5m, the bottom of well casing About 30cm.Well casing does not open up sieve aperture or screen slot above Polluted area to the part between ground, i.e. top uncontamination region is The well casing of not perforate.The vertical shaft type extraction well includes two kinds of association extraction well and independent extraction well, each association extraction well It is arranged on a heated well in a native hole, its bottom is than heating the depth of bottom beyond 1m or so；Each independent extracting Well is provided separately within a native hole.The high-temperature hot-air that hot-blast stove produces introduces heated well by the suction function of air-introduced machine and carries out Heating, high-temperature hot-air completes indirect heat exchange by heated well and soil, so as to improve heated well by way of heat transfer The soil and/or underground water temperature on well casing periphery, the hot wind for completing heat exchange are discharged using air-introduced machine.The hole diameter of association extraction well is 25-40cm；The top of the association extraction well is externally provided with a threeway on ground, i.e. association extraction well is set after elevating above the soil One threeway, two ports of export of threeway are respectively provided with valve, and one of port of export connection extracts manifold, another port of export is straight Logical air or compressed air gas source.The starting stage is run in vacuum extraction facility, is opened between association extraction well and extracting manifold Valve, closes the valve being connected with air or compressed air gas source；In the system operation middle and later periods, the valve between extracting manifold is closed Door, opens the valve that association extraction well is connected with air or compressed air gas source, and fresh air or injection pressure are sucked from air Contracting air is as disturbance wind.The hole diameter of the independent extraction well is 80-100cm, the independent extraction well and extracting manifold It is connected, valve is equipped between independent extraction well and extracting manifold.

The above-mentioned concentrated combustion formula original position thermal desorption prosthetic device for contaminated site, wherein, the extracting gang of wells, Its horizontal well formula extraction well is separately positioned in some horizontal channels dug in Polluted area topsoil；Well casing both ends are set respectively There is branch pipe, be connected by branch pipe with extracting manifold, branch pipe is equipped with switch valve.It is filled between the lateral wall and soil of well casing Quartz sand, filling bentonite in the groove above quartz sand.The hole diameter of the horizontal well formula extraction well is 45-55cm, is preferably 50cm, the depth of burying of horizontal well formula extraction well to ground is 0.2-0.5m, and well spacing is 2-5m, and level covers whole Polluted area Top layer.

The above-mentioned concentrated combustion formula original position thermal desorption prosthetic device for contaminated site, wherein, the subsurface flow Control unit, its water-stop curtain are made of twin shaft or three axle concrete mixing piles, the cement-soil-stirred pile from ground to Underground vertical sets and forms wall type structure and surrounds Polluted area, the depth depth 1-2m of its depth ratio Polluted area, described Cement-soil-stirred pile is equipped with bilayer, and internal layer uses cellular concrete, and outer layer uses normal concrete, and the internal layer is against pollution Regional extent is set, and the distance between outer layer and internal layer are preferably 45~55cm, and well-points dewatering is additionally provided between outer layer and internal layer Facility.That is, subsurface flow is realized by the form of the periphery of restoring area in the original location setting water-stop curtain.Water-stop curtain is using double Axis or three axle concrete mixing piles, depth is from earth's surface up under Polluted area bottom at 1-2m.Stirred using double-deck concrete Stake is mixed, first layer, that is, internal layer is laid against restoring area, is stirred pile driving construction using cellular concrete, the second layer, that is, outer layer is set Put in first layer periphery about at 50cm, pile driving construction is stirred using normal concrete.Well point is set to drop between two layers of mixing pile Drainage facility, 1-2m under precipitation depth to Polluted area bottom.The well-points dewatering facility is included and set from ground to underground vertical The dewatering well put, and the suction pump that setting is connected on the ground and with dewatering well.Dewatering well is beaten for lowering of watertable Well, connects suction pump groundwater abstraction after having beaten, reduces the water level of underground water.Cement-soil-stirred pile is that one kind for the treatment of of soft foundation has Effect form, is a kind of host agent using cement as curing agent, cement jet is entered the soil body using mixing pile machine and is sufficiently stirred, makes water With soil a series of physical chemical reaction occurs for mud, weak soil is hardened and is improved foundation strength.Cement-soil-stirred pile mixing pile is by master Construction way to be used is divided into single shaft, twin shaft and three axes agitating pile.Normal concrete (normal concrete) refer generally to Cement is major gelled material, with water, sand, stone, mixes chemical admixture and mineral admixture if necessary, matches somebody with somebody by proper proportion Close, the artificial stone formed by uniform stirring, closely knit shaping and maintenance hardening.Cellular concrete (Foamed Cement) is Foaming agent is mechanically fully foamed by the foamed system of air bubble machine, and foam is uniformly mixed with cement mortar, then Cast-in-place construction is carried out by the pumping system of foaming machine or mould molding, the one kind formed through natural curing contain a large amount of closings The novel light insulation material of stomata.

The above-mentioned concentrated combustion formula original position thermal desorption prosthetic device for contaminated site, wherein, the soil gas Control unit, the horizontally disposed scope of its concrete layer has more 1~2m than the respective edges of Polluted area, and is mixed with described Solidifying soil mixing pile is tightly connected.The concrete layer is divided into two layers up and down；Lower floor is cellular concrete, thickness 15-30cm； Upper strata is normal concrete, thickness 10-20cm.The concrete layer is setting the position of heated well and vertical shaft type extraction well Corresponding hole is reserved, is equipped with service sleeve in the hole, heated well and vertical shaft type extraction well pass through the pre-buried set Filling bentonite is sealed after concrete curing between Guan Bingyu service sleeves.That is, restoring area surface in the original location is passed through The form of concrete layer is set to realize soil gas control, earth's surface concrete layer horizontal extent has more each side 1- of restoring area 2m, is tightly connected with cement-soil-stirred pile.Concrete layer is set two layers, and lower floor 13 is cellular concrete, thickness 15-30cm；Upper strata For normal concrete, thickness 10-20cm.Concrete layer is in the position of all heated wells and vertical shaft type extraction well in installation process Or the position reserving hole that other pipelines pass through, service sleeve is set in hole, is preferably steel service sleeve or iron hoop.Heated well Service sleeve is passed through with vertical shaft type extraction well, by filling bentonite come close after concrete curing between service sleeve and well casing Envelope.

The above-mentioned concentrated combustion formula original position thermal desorption prosthetic device for contaminated site, wherein, the exhaust-gas treatment Unit, its adsorption plant and fans in series；The adsorption plant includes some activated carbon adsorbers；The activated carbon adsorption Tower serial or parallel connection is set.Preferably, gas detecting instrument is equipped with fan outlet, gas is discharged after detection is up to standard.Inhale Applying equipment is connected with vacuum pump outlet by pipeline, which is equipped with gas sampling device.The activated carbon adsorption Tower is arranged to some levels of series connection, and every grade sets some activated carbon adsorbers in parallel.Preferably, activated carbon adsorber passes through two Level series operation or the form operation of two groups of switchings in parallel, improve the utilization rate of exhaust gas active-carbon, strengthen anti-load impact performance With operational flexibility.The activated carbon adsorber is equipped with some drawer structures that can be replaced, and activity is equipped with drawer structure Charcoal.The namely activated carbon adsorber uses the drawer type design replaced easy to activated carbon, and fixed gas is removed by suction-operated In contaminant remaining after qualified discharge air.

The above-mentioned concentrated combustion formula original position thermal desorption prosthetic device for contaminated site, wherein, the wastewater treatment Unit, it is cell structure that it, which combines pond, and each lattice are set to coagulation area, precipitation-air-flotation area, chemical oxidation area successively；The coagulation area Medicine machine equipped with dosing coagulant, is additionally provided with blender in the coagulation area.It is equipped with the precipitation-air-flotation area oblique Pipe settling vessel and air floatation machine.The chemical oxidation area, which is equipped with, adds the medicine machine of oxidant, in the chemical oxidation area It is additionally provided with blender.Coagulation, precipitation/air supporting and Advanced oxidation technologies are carried out in the form of pond is combined in reaction, combination pond passes through The design of multiple lattices, realizes dosing coagulation, precipitation/air supporting, the different running method of chemical oxidation.The regulating reservoir is logical Gravity is crossed by the gravity oil removal sedimentary adjustive pool of each component precipitated and separated in sewage；The regulating reservoir is preferably vertical Tubular construction.The regulating reservoir is respectively equipped with water outlet at the liquid level being respectively layered that heterogeneity is formed, described Regulating reservoir is respectively equipped with thief hatch in each water outlet.The water outlet of each water outlet collects is passed through combination pond again in the duct.Using The form of oil removal sedimentary adjustive pool carries out water quality and quantity adjusting and gravity oil removal precipitation, and water outlet is equipped with adopting in different liquid levels Sample mouth, it is suitable to be selected according to the solid particulate matter delamination such as possible lightweight oils, heavy oils and silt in waste water Water exit position.The sand filtration apparatus is quartz filter；Quartz filter, scientific name shallow media filter (English： Shallow medium filter), it be by the use of quartz sand as filter medium, it is under pressure, turbidity is higher Water passes through the quartz sand filtration of certain thickness granular or non-grain, the effective suspended matter retained in removing water, organic matter, colloid Particle, microorganism, chlorine, odor and part heavy metal ion etc., being finally reached reduces water turbidity, one kind height for the effect that purifies water Imitate filter plant.The carbon filtration equipment is active carbon filter.Active carbon filter is a kind of more common water treatment facilities, It is a kind of filtering apparatus of tank body, shell is generally stainless steel or fiberglass, and inside filling activated carbon, was used in drainage Educt, microorganism, part heavy metal ion, and can effectively reduce the colourity of water.The discharge bay is set equipped with water quality detection Standby, treated waste water is stored temporarily in discharge bay, and pipe of being received after detection is up to standard discharges.The regulating reservoir, combination pond, sand Each processing equipments such as filter equipment, carbon filtration equipment and discharge bay are respectively provided with bypass and surmount pipeline, are adjusted flexibly easy to run operation.

Concentrated combustion formula original position thermal desorption prosthetic device provided by the utility model for contaminated site has following excellent Point：

The device is primarily adapted for use in various volatile organic matters, semi-volatile organic matter, petroleum hydrocarbon or mercury pollution place Soil underground water in-situ immobilization engineering, for existing thermal desorption recovery technique in situ existing deficiency in practical applications, energy Enough reach using conventional fuel as energy source, efficiency of energy utilization is high, place subsurface flow is easy to control, soil gas can effectively be caught Collection, pollutant condensation recycling and pollutant treatment are efficient, system equipment is simple and safe, secondary pollution is controllable, repair Effect is good and other effects.

The device belongs to combustion-type original position thermal desorption recovery technique field, by different fuel by way of heat production of burning The chemical energy of (oil gas, natural gas or diesel oil etc.) is converted to thermal energy, directly passes through heat using high-temp combustion flue gas as heat carrier The mode of conduction conducts heat to underground via the heated well of contaminated site installation in situ, so as to improve place temperature and realize The purpose that the desorption of target contaminant and extracting remove.The high-temperature flue gas that combustion-type original position thermal desorption recovery technique produces can reach To 750-900 DEG C, the contaminated site soil moisture reaches as high as more than 600 DEG C after indirect heat exchange and heat transfer, and there is the energy to hold Easily obtain, system is safe and reliable, thermal desorption temperature is high, repairing effect is good, pollutant concentration such as does not rebound at the outstanding feature after reparation, Have broad application prospects.

Brief description of the drawings

Fig. 1 is the structural representation of the concentrated combustion formula original position thermal desorption prosthetic device for contaminated site of the utility model Figure.

Fig. 2 is the burning heat transfer of the concentrated combustion formula original position thermal desorption prosthetic device for contaminated site of the utility model With waste heat recovery cellular construction schematic diagram.

Fig. 3 is the heated well knot of the concentrated combustion formula original position thermal desorption prosthetic device for contaminated site of the utility model Structure schematic diagram.

Fig. 4 is the extracting condensation of the concentrated combustion formula original position thermal desorption prosthetic device for contaminated site of the utility model With gas-liquid separation unit structure diagram.

Fig. 5 is the extracting well casing of the concentrated combustion formula original position thermal desorption prosthetic device for contaminated site of the utility model Structure diagram.

Fig. 6 is that the horizontal well formula of the concentrated combustion formula original position thermal desorption prosthetic device for contaminated site of the utility model is taken out Carry the enlarged section of well.

Fig. 7 is that the horizontal well formula of the concentrated combustion formula original position thermal desorption prosthetic device for contaminated site of the utility model is taken out Carry the section partial enlarged view of well.

Fig. 8 is the exhaust-gas treatment of the concentrated combustion formula original position thermal desorption prosthetic device for contaminated site of the utility model Cellular construction schematic diagram.

Fig. 9 is the wastewater treatment of the concentrated combustion formula original position thermal desorption prosthetic device for contaminated site of the utility model Cellular construction schematic diagram.

Embodiment

Specific embodiment of the present utility model is further described below in conjunction with attached drawing.

As shown in Figure 1, the concentrated combustion formula original position thermal desorption prosthetic device provided by the utility model for contaminated site, Include burning heat transfer and waste heat recovery unit, extracting condensation and gas-liquid separation unit, subsurface flow control unit, soil gas control Unit, exhaust gas treatment unit, treatment unit for waste water and pipeline processed.Burning heat transfer and waste heat recovery unit include hot-blast stove 17, Gas-gas heat exchanger 5, air blower, air-introduced machine 6, exhaust tube 11 and heating gang of wells.Extracting condensation and gas-liquid separation unit, which include, takes out Carry gang of wells, heat exchange condensing plant, gas-liquid separation equipment, deentrainment tower 64 and vacuum pump 42；Extracting gang of wells includes some extraction wells Pipe 41, extracting well casing 41 includes some vertical shaft type extraction wells 43 being vertically mounted in contaminated site, and is horizontally arranged at dirt Contaminate some horizontal well formula extraction wells 45 in 16 topsoil of region；Opened up respectively on extracting well casing 41 some along well casing direction interval Uniform sieve aperture or screen slot 46.Subsurface flow control unit includes the sealing curtain for being arranged on the periphery of Polluted area 16 for needing to repair Curtain.Soil gas control unit includes the concrete layer 12 for the covering Polluted area 16 being arranged on the ground of contaminated site.It is useless Gas disposal unit includes adsorption plant and wind turbine 66.Treatment unit for waste water includes the regulating reservoir 70 set gradually, combination pond 71, sand Filter equipment, carbon filtration equipment and discharge bay 72.

As shown in Fig. 2, burning heat transfer and waste heat recovery unit hot-blast stove 17 be equipped with combustion air inlet 19, Secondary Air into Mouth 20 and hot-blast outlet 21；Gas-gas heat exchanger 5 is equipped with hot wind inlet 22, cold wind import 23, exhaust outlet 24 and Secondary Air outlet 25, Secondary Air outlet 25 is connected by pipeline with the secondary air inlet 20 of hot-blast stove 17；Heating gang of wells includes some heated wells 1, heats Well 1 is equipped with hot-wind inlet 8 and hot wind row's mouth 9, and the hot-wind inlet 8 of heated well 1 passes through pipeline and the hot wind of hot-blast stove 17 respectively The connection of outlet 21, hot wind row's mouth 9 of heated well 1 are connected by pipeline and exhaust tube 11 or 5 hot wind inlet 22 of gas-gas heat exchanger respectively Connect, the exhaust outlet 24 of gas-gas heat exchanger 5 is connected also by pipeline with exhaust tube 11；Exhaust tube 11 is connected with air-introduced machine 6；Air blower Comprising combustion fan 26 and air intake blower fan 27, combustion fan 26 is installed at the combustion air inlet 19 of hot-blast stove 17, inlet air wind Machine 27 is installed at the cold wind import 23 of gas-gas heat exchanger 5.The combustion air inlet 19 of hot-blast stove 17 is equipped with the first valve 28, and two The second valve 29 and the 3rd valve 30 are equipped with secondary wind inlet 20, the second valve 29 is arranged on the pipeline for being introduced directly into air, 3rd valve 30 is arranged on the pipeline between the Secondary Air outlet 25 of gas-gas heat exchanger 5 and the secondary air inlet 20 of hot-blast stove 17 On, pressure sensitive is equipped with hot-blast outlet 21 and is popped one's head in.

Hot-blast stove 17 is centralized hot-blast stove 17, using natural gas, oil gas or diesel oil etc. as fuel, is fired by burning Material produces high-temperature hot-air as In Situ Heating heat source.Burner, combustion chamber, mixing chamber, that is, burner hearth are equipped with hot-blast stove 17.For Larger hot-blast stove 17, combustion air input heat from combustion air inlet 19 in proportion by air blower according to fuel feed Wind furnace 17, high-temperature hot-air is produced by burner by fuel combustion；For small-sized air heating furnace 17, combustion air is drawn by system end The negative pressure suction combustion air inlet 19 that the operation of wind turbine 6 produces, is opened by adjusting the first valve 28 at combustion air inlet 19 Degree size adjusts air imbibed quantity manually.Fresh Secondary Air is run and in the mixing of hot-blast stove 17 by system end air-introduced machine 6 The negative pressure of indoor generation is sucked from secondary air inlet 20, or is directly sent into heat by gas-gas heat exchanger 5 using special air blower Wind furnace 17.From the hot blast temperature that hot-blast outlet 21 is come out of the stove by adjusting burner load or adjusting secondary air inlet 20 everywhere second The mode of 30 aperture size of valve 29 and the 3rd valve is adjusted.The pressure sensitive probe set at hot-blast outlet 21, when Detect that burner can be automatically closed when pressure is higher than the negative pressure value set herein, when pressure is less than the negative pressure value set herein Burner can automatic start.

The hot wind that hot-blast stove 17 produces completes indirect heat exchange by the heated well 1 of installation in the venue with soil, completes to change The hot wind of heat is discharged into air by the effect of air-introduced machine 6 from exhaust tube 11, or enters and be installed on 17 secondary air inlet 20 of hot-blast stove The gas-gas heat exchanger 5 of front end, air is discharged after being exchanged heat with fresh cold wind by exhaust tube 11 again.Gas-gas heat exchanger 5 is with adding The hot wind inlet 22 that hot well 1 connects, and the exhaust outlet 24 being connected with exhaust tube 11 are respectively equipped with the 4th valve 35.Gas-gas heat exchange The pipeline that the pipeline and gas-gas heat exchanger 5 that device 5 is connected with heated well 1 are connected with exhaust tube 11 is also attached, and equipped with the 4th Valve 35.

Each hot-blast stove 17 is connected with a heated well 1 or several heated wells 1 respectively；It is connected with same hot-blast stove 17 Several heated wells 1 between it is in parallel, or be arranged to connect between adjacent heated well 1.I.e., it is possible to centralization heat is flexibly set The collocation form of wind furnace 17 and heating gang of wells, including a hot-blast stove 17 are equipped with a heated well 1；Or a hot-blast stove 17 is matched somebody with somebody Standby multiple heated wells 1, multiple 1 parallel runnings of heated well, and by being arranged on the hot wind regulating valve 10 of 1 hot wind of heated well row's mouth 9 The hot blast rate that adjusting enters each heated well 1 is as balanced as possible；Adjacent heated well 1 also can series operation, high-temperature hot-air is through one Heated well 1 is finished changing to be re-fed into after heat after another heated well 1 continues heat exchange and discharged again.

As shown in figure 3, heated well 1 to subsurface, vertical or is obliquely installed in contaminated site from ground, in the horizontal plane with Triangle or square arrangement arrangement, composition heating gang of wells；The depth of heated well 1 is more than the depth for the Polluted area 16 for needing to repair Degree.Preferably, for the well spacing of heated well 1 between 1-3m, the depth ratio of heated well 1 needs the target stains region 16 repaired Depth depth 0.3-0.5m.Heated well 1 is inside and outside concentric tubes structure, includes outer tube 3 and inner tube 2, the madial wall and inner tube of outer tube 3 Annular gap is left between 2 lateral wall, the bottom of inner tube 2 is higher than 3 bottom of outer tube, and 3 bottom of outer tube is equipped with bottom cover 4,2 bottom of inner tube Portion is the opening for not setting bottom cover 4；Preferably, 3 caliber 100-140cm of outer tube, 2 caliber 75-90cm of inner tube；2 bottom of inner tube with it is outer The spacing of 3 bottom of pipe is 20-30cm.Outer tube 3 is installed on pre-set by ground native hole downwards in contaminated site, outer tube Annular gap is left between 3 lateral wall and native hole madial wall, is filled with filler 7 in it.Preferably, the lateral wall of outer tube 3 and soil The annular gap that thickness is 10-20cm is equipped between the madial wall of hole, filler 7 is quartz sand or haydite, is equipped with filler 7 some high Spend different thermocouple temperature measurement probes.That is, there is the gap of 10-20cm when heated well 1 is installed between the native hole of outer tube 3 and probing, directly Connect and insert quartz sand, or insert haydite.Thermocouple temperature measurement is set to pop one's head at different depth between filler 7.The top of heated well 1 Portion is above the ground level, and the top of heated well 1 is equipped with the hot-wind inlet 8 being connected with hot-blast stove 17；Heated well 1 is above the ground level the side of part Wall is equipped with hot wind row's mouth 9.Hot wind row's mouth 9 is equipped with hot wind regulating valve 10.The negative pressure that high-temperature hot-air passes through system end air-introduced machine 6 Effect introduces heated well 1 and is heated, and high-temperature hot-air is first from top to bottom sent into the well casing bottom of heated well 1 through inner tube 2, then passes through Gap between inner tube 2 and outer tube 3 is from bottom to top turned back back ground, and mouth is arranged from hot wind after the hot wind regulating valve 10 of a side 9 discharges.Heated well can be turned or close automatically down by electric-control system when 7 temperature of filler reaches a higher set temperature 10 aperture of hot wind regulating valve of 1 end；When 7 temperature of filler reaches a relatively low set temperature can be automatic by electric-control system Open or tune up 10 aperture of hot wind regulating valve.Electric-control system is preferably STM32F407 microcontrollers.

As shown in figure 4, the extracting gang of wells of extracting condensation and gas-liquid separation unit is connected by pipeline with heat exchange condensing plant, Gas-liquid separation equipment is arranged on the rear end of heat exchange condensing plant, is set gradually after heat exchange condensing plant and gas-liquid separation equipment Deentrainment tower 64 and vacuum pump 42；Heat exchange condensing plant includes evaporation type air cooling tower 58 and gas-liquid heat-exchange 59；Gas-liquid separation equipment For inertial gas-liquid separator；By the fixed gas after gas-liquid separation equipment and heat exchange condensing plant condensation separation after deentrainment tower 64 Into vacuum pump 42, be again sent into follow-up exhaust gas treatment unit through vacuum pump 42, the condensed fluid after separation by pipeline extremely Treatment unit for waste water；Extract gang of wells, its soil gas extracted can directly by pipeline be sent into hot-blast stove 17 Secondary Air into Mouth 20 carries out burning processing, or again by gas after heat exchange condensing plant and gas-liquid separation equipment condensation recovery section pollutant The secondary air inlet 20 for being sent into hot-blast stove 17 carries out burning processing, or is condensed back to by heat exchange condensing plant and gas-liquid separation equipment Qualified discharge after being handled again by exhaust gas treatment unit after receiving portions pollutant.Exchange heat condensing plant and gas-liquid separation equipment composition Multi-stage condensing separation equipment；It is sequentially connected between multi-stage condensing separation equipment is at different levels；The first order includes the pipe of connection extracting gang of wells Road and an inertial gas-liquid separator after pipeline；The second level includes evaporation type air cooling tower 58 and installed in vaporation-type sky An inertial gas-liquid separator after cold tower 58；The third level include gas-liquid heat-exchange 59 and after gas-liquid heat-exchange 59 one A inertial gas-liquid separator.That is, multi-stage condensing separation equipment can be flexibly set, first order condensation separation is using greatly Gas acts on the natural cooling of ground extraction well pipe 41, is followed by an inertia-type gas-liquid separator i.e. level-one moisture trap 61； Second level condensation separation is followed by an inertia-type gas-liquid separator i.e. two level using evaporation type air cooling tower 58 as heat exchange condensing plant Moisture trap 62；Third level condensation separation is provided using gas-liquid heat-exchange 59 as heat exchange condensing plant using handpiece Water Chilling Units 60 Low temperature chilled water as refrigerant, be followed by an inertia-type gas-liquid separator i.e. three-level moisture trap 63.Vacuum pump 42 uses The claw or Roots type vacuum pump 42 of dry type with certain overcurrent heating ability, have certain overcurrent heating ability, 42 Outlet Gas Temperature of vacuum pump slightly raises, but can substantially reduce the relative humidity of gas, helps to improve subsequent adsorbtion The adsorption efficiency of equipment.Deentrainment tower 64 is equipped with any one in mesh mist eliminator, baffle plate demister or rotational flow plate defroster. Deentrainment tower 64 is mainly used for removing the fine drop of on-condensible gas remnants, further reduces the processing load of subsequent adsorbtion equipment, Activated carbon adsorption efficiency is improved, while protects vacuum pump 42 from liquid corrosion.The gas of deentrainment tower 64 and activated carbon adsorber 67 Body entrance is all located at lower part, and gas vent is located at tower top.Extracting gang of wells is will to extract well casing 41 and multistage by extracting manifold 40 Condensation separation equipment connects, composition extracting gang of wells；Vertical shaft type extraction well 43 and horizontal 45 vertical interlaced of well formula extraction well are distributed in together A piece of contaminated site is interior and covers whole Polluted area 16.Extract gang of wells by the suction that the vacuum pump 42 of cell end produces into Row vacuum extraction.

If as shown in figure 5, vertical shaft type extraction well 43 be separately mounted in contaminated site it is pre-set by ground downwards In dry ground hole；Vertical shaft type extraction well 43 arranges that well spacing is 1-3m in horizontal layout in the form of triangle or square； Filled with quartz sand 50 and at the top of quartz sand 50 between the lateral wall of the well casing of vertical shaft type extraction well 43 and the madial wall in native hole Fill bentonite 18 to ground and carry out sealing of hole；The packed height of quartz sand 50 and sieve aperture or sieve on the well casing of vertical shaft type extraction well 43 The setting span scope of seam 46 is basically identical.Opened up on the well casing of vertical shaft type extraction well 43 some evenly spaced along well casing direction Sieve aperture or screen slot 46；The setting span of sieve aperture or screen slot 46 on well casing vertically covers whole Polluted area 16 and compares Polluted area 16 bottom depth 0.3-0.5m, the bottom of well casing are equipped with bottom plate 47,47 thickness of bottom plate about 30cm.Well casing arrives above Polluted area 16 Part between ground does not open up sieve aperture or screen slot 46, i.e. top uncontamination region 16 is the well casing of not perforate.Vertical shaft type extracts Well 43 includes 49 two kinds of association extraction well 48 and independent extraction well, and each association extraction well 48 and a heated well 1 are arranged on one In a soil hole, its bottom exceeds 1m or so than the depth of 1 bottom of heated well；Each independent extraction well 49 is provided separately within a soil In hole.The high-temperature hot-air that hot-blast stove 17 produces introduces heated well 1 by the suction function of air-introduced machine 6 and is heated, high-temperature hot-air Indirect heat exchange is completed by heated well 1 and soil, so as to improve the soil on the well casing periphery of heated well 1 by way of heat transfer Earth and/or underground water temperature, the hot wind for completing heat exchange are discharged using air-introduced machine 6.The hole diameter of association extraction well 48 is 25-40cm； The top of association extraction well 48 is externally provided with a threeway 51 on ground, i.e. association extraction well 48 sets a threeway after elevating above the soil 51, two ports of export of threeway 51 are respectively provided with valve, and one of port of export is equipped with the 5th valve 52, and connection extracts manifold 40, Another port of export is equipped with the 6th valve 53, leads directly to air or compressed air gas source.The starting stage is run in vacuum extraction facility, The 5th valve 52 between association extraction well 48 and extracting manifold 40 is opened, closes the 6th be connected with air or compressed air gas source Valve 53；In the system operation middle and later periods, the 5th valve 52 between extracting manifold 40 is closed, opens association extraction well 48 and air Or the 6th valve 53 of compressed air gas source connection, fresh air or injecting compressed air are sucked as disturbance wind from air. The hole diameter of independent extraction well 49 is 80-100cm, and independent extraction well 49 is connected with extracting manifold 40, independent extraction well 49 and extracting The 7th valve 54 is equipped between manifold 40.

As shown in Figure 6 and Figure 7, horizontal well formula extraction well 45 be separately positioned in 16 topsoil of Polluted area dig it is some In horizontal channel 55；Well casing both ends are respectively equipped with branch pipe 56, are connected by branch pipe 56 with extracting manifold 40, branch pipe 56 is equipped with and cuts Change valve 57.Quartz sand 50 is filled between the lateral wall and soil of well casing, swelling is filled in the groove 55 of the top of quartz sand 50 Soil 18.The hole diameter of horizontal well formula extraction well 45 is 45-55cm, is preferably 50cm, and horizontal well formula extraction well 45 arrives the depth of burying on ground For 0.2-0.5m, well spacing is 2-5m, and level covers whole 16 top layer of Polluted area.

The water-stop curtain of subsurface flow control unit is made of twin shaft or three axle concrete mixing piles 36, concrete stirring Stake 36, which sets from ground to underground vertical and forms wall type structure, surrounds Polluted area 16, the depth of its depth ratio Polluted area 16 Depth 1-2m is spent, cement-soil-stirred pile 36 is equipped with bilayer, and internal layer 37 uses cellular concrete, and outer layer 38 uses normal concrete, interior Layer 37 against 16 scope of Polluted area set, the distance between outer layer 38 and internal layer 37 preferably 45~55cm, outer layer 38 with it is interior Well-points dewatering facility is additionally provided between layer 37.That is, realized by the form of the periphery of restoring area in the original location setting water-stop curtain Subsurface flow.Water-stop curtain uses twin shaft or three axle concrete mixing piles 36, and depth is from earth's surface up to 16 bottom of Polluted area At lower 1-2m.Using double-deck cement-soil-stirred pile 36, first layer, that is, internal layer 37 is laid against restoring area, using bubble coagulation Soil is stirred pile driving construction, and the second layer, that is, outer layer 38 is arranged on first layer periphery about at 50cm, is stirred using normal concrete Mix pile driving construction.Well-points dewatering facility is set between two layers of mixing pile, 1-2m under precipitation depth to 16 bottom of Polluted area.Well point drops Drainage facility includes the dewatering well 39 set from ground to underground vertical, and the pumping that setting is connected on the ground and with dewatering well 39 Water pump.Dewatering well 39 is the well beaten for lowering of watertable, connection suction pump groundwater abstraction after having beaten, and reduces the water of underground water Position.The underground water that well-points dewatering facility extracts inputs treatment unit for waste water by pipeline.Cement-soil-stirred pile 36 is treatment of soft foundation A kind of effective form, be a kind of host agent using cement as curing agent, cement jet entered into the soil body and abundant using mixing pile machine Stirring, makes cement that a series of physical chemical reaction occur with soil, weak soil is hardened and is improved foundation strength.Cement-soil-stirred pile 36 Mixing pile is divided into single shaft, twin shaft and three axes agitating pile by master's construction way to be used.Normal concrete (normal Concrete) refer generally to using cement as major gelled material, with water, sand, stone, mix chemical admixture if necessary and mineral are mixed Material is closed, is coordinated by proper proportion, the artificial stone formed by uniform stirring, closely knit shaping and maintenance hardening.Cellular concrete (Foamed Cement) is that foaming agent is mechanically fully foamed by the foamed system of air bubble machine, and by foam and water Mud slurry uniform mixes, and then carries out cast-in-place construction or mould molding by the pumping system of foaming machine, is formed through natural curing A kind of novel light insulation material containing a large amount of sealed porositys.

The horizontally disposed scope of the concrete layer 12 of soil gas control unit is more than the respective edges of Polluted area 16 Go out 1~2m, and be tightly connected with cement-soil-stirred pile 36.Concrete layer 12 divides for upper and lower two layers；Lower floor 13 is cellular concrete, Thickness is 15-30cm；Upper strata 14 is normal concrete, thickness 10-20cm.Concrete layer 12 is setting heated well 1 and vertical shaft Corresponding hole is reserved in 43 position of formula extraction well, is equipped with service sleeve 15 in hole, heated well 1 and vertical shaft type extraction well 43 pass through Service sleeve 15 is simultaneously sealed between service sleeve 15 in concrete curing rear filling bentonite 18.That is, by the original location Restoring area surface sets the form of concrete layer 12 to realize soil gas control, and 12 horizontal extent of earth's surface concrete layer has more Each side 1-2m of restoring area, is tightly connected with cement-soil-stirred pile 36.Concrete layer 12 is set two layers, and lower floor 1313 is bubble coagulation Soil, thickness 15-30cm；Upper strata 14 is normal concrete, thickness 10-20cm.Concrete layer 12 adds all in installation process The position reserving hole that the position or other pipelines of hot well 1 and vertical shaft type extraction well 43 pass through, service sleeve 15 is set in hole, excellent Elect steel service sleeve or iron hoop as.Heated well 1 and vertical shaft type extraction well 43 pass through service sleeve 15, service sleeve 15 and well casing Between sealed after concrete curing by filling bentonite 18.

As shown in figure 8, the adsorption plant and wind turbine 66 of exhaust gas treatment unit are connected；Adsorption plant is inhaled comprising some activated carbons Attached tower 67；67 serial or parallel connection of activated carbon adsorber is set.Preferably, 66 exit of wind turbine is equipped with gas detecting instrument, and gas exists Detect it is up to standard after discharged.Adsorption plant is exported with vacuum pump 42 and is connected by pipeline, which adopts equipped with gas Sample equipment 69.Activated carbon adsorber 67 is arranged to some levels of series connection, and every grade sets some activated carbon adsorbers 67 in parallel.It is excellent Selection of land, activated carbon adsorber 67 is run by two-stage series connection or the form of two groups of switchings in parallel is run, and improves exhaust gas active-carbon Utilization rate, strengthens anti-load impact performance and operational flexibility.Activated carbon adsorber 67 is equipped with some drawer knots that can be replaced Structure 68, drawer structure 68 is interior to be equipped with activated carbon.Namely the activated carbon adsorber 67 is using the drawer type replaced easy to activated carbon Design sets drawer structure 68, and qualified discharge air after the contaminant remaining in fixed gas is removed by suction-operated.

As shown in figure 9, the combination pond 71 for the treatment of unit for waste water is cell structure, each lattice are set to coagulation area 75, precipitation successively Air flotation zone 76, chemical oxidation area 77；Coagulation area 75 is equipped with the medicine machine 78 of dosing coagulant, and stirring is additionally provided with coagulation area 75 Device.Tube settler and air floatation machine are equipped with precipitation-air-flotation area 76.Chemical oxidation area 77 is equipped with the medicine machine for adding oxidant 78, blender is additionally provided with chemical oxidation area 77.Coagulation, precipitation/air supporting and advanced are carried out in the form of pond 71 is combined in reaction Chemical oxidation, combines design of the pond 71 by multiple lattices, realizes the different operations of dosing coagulation, precipitation/air supporting, chemical oxidation Mode.Regulating reservoir 70 is by the gravity oil removal sedimentary adjustive pool 70 of each component precipitated and separated in sewage by gravity；Adjust It is preferably vertical barrel type structure to save pond 70.Regulating reservoir 70 is respectively equipped with out at the liquid level being respectively layered that heterogeneity is formed The mouth of a river 73, regulating reservoir 70 are respectively equipped with thief hatch 74 at each water outlet 73.The water outlet of each water outlet 73 collects in the duct again It is passed through combination pond 71.Water quality and quantity adjusting and gravity oil removal precipitation are carried out in the form of oil removal sedimentary adjustive pool 70, in difference Liquid level is equipped with water outlet 73 and thief hatch 74, according to the solid such as possible lightweight oils, heavy oils and silt in waste water Particulate matter delamination selects suitable water exit position.Sand filtration apparatus is quartz filter 32；32 scientific name of quartz filter Shallow media filter (English：Shallow medium filter), it is by the use of quartz sand as filter medium, certain Pressure under, the quartz sand filtration the higher water of turbidity by certain thickness granular or non-grain, effective retention removes water In suspended matter, organic matter, colloidal particles, microorganism, chlorine, odor and part heavy metal ion etc., be finally reached that to reduce water turbid Spend, a kind of High-cfficiency Filtration equipment for the effect that purifies water.Carbon filtration equipment is active carbon filter 33.Active carbon filter 33 is one The more common water treatment facilities of kind, are a kind of filtering apparatuses of tank body, and shell is generally stainless steel or fiberglass, inside filling Activated carbon, was used for educt in drainage, microorganism, part heavy metal ion, and can effectively reduce the colourity of water.Discharge bay 72 are equipped with water quality detection equipment 34, and treated waste water is stored temporarily in discharge bay 72, and pipe of being received after detection is up to standard discharges.Adjust Each processing equipments such as section pond 70, combination pond 71, sand filtration apparatus, carbon filtration equipment and discharge bay 72 are respectively provided with bypass and surmount pipeline 31, it is adjusted flexibly easy to run operation.

The concentrated combustion formula original position thermal desorption provided by the utility model for contaminated site is repaiied with reference to embodiment Apparatus for coating is further described.

Embodiment 1

A kind of concentrated combustion formula original position thermal desorption prosthetic device for contaminated site, includes burning heat transfer and waste heat recovery It is unit, extracting condensation and gas-liquid separation unit, subsurface flow control unit, soil gas control unit, exhaust gas treatment unit, useless Water treatment unit and pipeline.Burning heat transfer and waste heat recovery unit include hot-blast stove 17, gas-gas heat exchanger 5, air blower, air inducing Machine 6, exhaust tube 11 and heating gang of wells.Extracting condensation and gas-liquid separation unit include extracting gang of wells, heat exchange condensing plant, gas-liquid Separation equipment, deentrainment tower 64 and vacuum pump 42；Extract gang of wells and include some extracting well casings 41, extracting well casing 41 includes vertical peace Some vertical shaft type extraction wells 43 in contaminated site, and some horizontal strokes being horizontally arranged in 16 topsoil of Polluted area Well formula extraction well 45；Opened up respectively on extracting well casing 41 some along the evenly spaced sieve aperture in well casing direction or screen slot 46.Underground water Flow control unit includes the water-stop curtain for being arranged on the periphery of Polluted area 16 for needing to repair.Soil gas control unit is included and set Put the concrete layer 12 of the covering Polluted area 16 on the ground of contaminated site.Exhaust gas treatment unit includes adsorption plant and wind Machine 66.Treatment unit for waste water includes the regulating reservoir 70 set gradually, combination pond 71, sand filtration apparatus, carbon filtration equipment and discharge bay 72。

The adjustable height of temperature that burning heat transfer and waste heat recovery unit are produced using 17 fuel combustion of centralized hot-blast stove Wind is warmed as In Situ Heating heat source.Hot-blast stove 17 is mainly by burner, combustion chamber, mixing chamber, secondary air inlet 20 and hot wind Outlet 21 is formed, and burner can use natural gas, oil gas or diesel oil as fuel, while be equipped with combustion air inlet 19, fuel forms combustion flame in burner, and then enters combustion chamber and complete combustion process.For larger hot-blast stove 17, combustion air can be inputted in proportion by air blower according to fuel feed；For small-sized air heating furnace 17, combustion air can be by list The negative pressure suction that first operation of end air-introduced machine 6 produces, the first valve 28 set by combustion air inlet 19 adjust empty manually Throughput.The high-temperature flue gas that combustion chamber produces enters in mixing chamber to be sufficiently mixed with the fresh air from secondary air inlet 20, Further help to burn completely while formed the high-temperature hot-air for reaching design temperature scope, discharge and use through hot-blast outlet 21.Newly Fresh Secondary Air can be run the negative pressure produced by cell end air-introduced machine 6 and suck hot-blast stove 17, it is possible to use special air blower It is sent into hot-blast stove 17.The hot blast temperature come out of the stove can be by adjusting burner load or adjusting the second valve at secondary air inlet 20 Door 29 and 30 aperture of the 3rd valve so adjust cold flow mode be adjusted.Second valve 29, which is arranged on, is introduced directly into sky On the pipeline of gas, the 3rd valve 30 is arranged on Secondary Air outlet 25 and the secondary air inlet 20 of hot-blast stove 17 of gas-gas heat exchanger 5 Between pipeline on.Set pressure sensitive to pop one's head at hot-blast outlet 21, burn when pressure is higher than the negative pressure value set herein Device can be automatically closed, and burner can just start when only pressure is less than the negative pressure value set here, so at unit end In the case that end air-introduced machine 6 does not work or all smoke outlets are turned off, less than negative pressure, burner can be realized automatically for probe sensing Close.Air blower includes combustion fan 26 and air intake blower fan 27, and combustion fan 26 is installed on the combustion air inlet of hot-blast stove 17 At 19, air intake blower fan 27 is installed at the cold wind import 23 of gas-gas heat exchanger 5.

The high-temperature hot-air that centralized hot-blast stove 17 produces is completed to change indirectly by the heated well 1 of installation in the venue with soil Heat, so as to improve the soil and/or underground water temperature on the well casing periphery of heated well 1 by way of heat transfer.Complete heat exchange Hot wind air directly can be discharged into by exhaust tube 11 through cell end air-introduced machine 6, or be sent into and be installed on centralized hot-blast stove The gas-gas heat exchanger 5 of 17 cold wind import, 23 front end, air is discharged after being exchanged heat with fresh Secondary Air by exhaust tube 11 again, from And realize the waste heat recovery of hot wind, reduce plant energy consumption.

The high-temperature hot-air that centralized hot-blast stove 17 produces introduces heated well 1 by the suction function of cell end air-introduced machine 6 Heated.The well casing of heated well 1 is the design of inside and outside concentric tubes, 120-140 centimetres of 3 caliber of outer tube, 2 caliber 40- of inner tube 75 centimetres, generally using stainless steel；3 bottom of outer tube sets bottom cover 4, and 2 bottom of inner tube does not set bottom cover 4, with 3 bottom spacing of outer tube 20-30 centimetres.High-temperature hot-air is first from top to bottom sent into the well casing bottom of heated well 1 through inner tube 2, then by between inner tube 2 and outer tube 3 Gap from bottom to top turn back back ground, discharged after the hot wind regulating valve 10 of a side from hot wind row's mouth 9, so as to reach The purpose of balanced heat-exchange temperature.

The annular space of 10-20cm is generally had during the well casing installation of heated well 1 between the native hole of outer tube 3 and probing, can be direct Quartz sand is inserted to ensure heat-transfer effect, or inserts the haydite that thermal capacity is big, thermal conductivity factor is good.In not between ceramics filling 7 Set thermocouple temperature measurement to pop one's head in depth, can pass through when haydite temperature reaches such as 650 DEG C of higher set temperature 10 aperture of hot wind regulating valve of 1 end of heated well is turned or closed automatically to electric-control system down, reduces the high temperature provided to the heated well 1 Hot wind；It can be automatically turned on or adjust by electric-control system when haydite temperature reaches such as 400 DEG C of relatively low set temperature Big 10 aperture of hot wind regulating valve, increases the high-temperature hot-air provided to the heated well 1.Since haydite not only may insure heat transfer effect Fruit, also with preferable heat storage capacity, therefore above-mentioned switching can continue a relatively long time, can so realize and add 1 periphery heat of hot well stops providing heat to heated well 1 before not conducting in time, so as to effectively prevent heated well 1 Interior high-temperature hot-air and the Soil Surrounding temperature difference it is smaller and caused by poor heat transfer effect, reduce the energy consumption level of device.

According to contaminated sites distribution situation, place physical condition and device design feature, centralized hot wind can be flexibly set The collocation form of stove 17 and heating gang of wells, such as hot-blast stove 17 are equipped with a heated well 1, or a hot-blast stove 17 be equipped with it is more A heated well 1, multiple 1 parallel runnings of heated well, and the hot wind regulating valve 10 by being arranged on 1 hot wind of heated well row's mouth 9 enter The hot blast rate of each heated well 1 is as balanced as possible；Adjacent heated well 1 can also series operation, i.e., high-temperature hot-air through one heating Well 1 is finished changing to be re-fed into after heat after another heated well 1 continues heat exchange and discharged again.Heated well 1 is generally vertically-mounted, in the plane may be used To be arranged by the form of triangle or square, between 1-3 meters, 1 depth of heated well determines well spacing according to pollution depth, 0.3-0.5 meters of target stains depth can generally be exceeded；Under more special application conditions, diagonally-installed and cloth can also be carried out Put.

Vacuum extraction is realized by the vacuum pump 42 on ground and installation extracting well casing 41 in the venue, passes through vacuum pump The negative pressure that 42 operations produce is by the pollutant separated from soil media through taking out in the form of underground water or soil gas Carry well and be drawn to ground by extracting manifold 40 and handled.Vacuum extraction generally carries out the extracting fortune of underground water prior to heating OK, waste water treatment system is sent to handle after extracting 16 underground water of Polluted area out ground as much as possible, with saving subsequent heat The energy of consumption needed for lower water, reduces processing load.Extraction well is generally stainless steel, is divided to two kinds of forms, one kind is vertical shaft Formula extraction well 43, is vertically mounted in contaminated site；One kind is horizontal well formula extraction well 45, is horizontally arranged at 16 top layer of Polluted area In soil.

Vertical shaft type extraction well 43 is divided to two kinds of forms again, and a kind of is that the association being arranged on heated well 1 in same native hole is taken out Carry well 48, hole diameter is identical with the depth of heated well 1 in 25-40cm；A kind of is the independent extraction well 49 being built up between heated well 1, Hole diameter exceeds 1m in 80-140cm, the depth than heated well 1.Sieve aperture or screen slot 46 are opened on the well casing of vertical shaft type extraction well 43, is opened Hole span vertically covers whole Polluted area 16 and also goes out about 0.3-0.5m deeply than 16 bottom of Polluted area, should additionally add about Bottom plate 47 (well casing of not perforate and silently) after 30cm, top uncontamination region 16 are the well casing of not perforate.Independent extraction well 49 are directly connected with extracting manifold 40；Association extraction well 48 sets a threeway 51 after elevating above the soil, both ends outlet is respectively provided with valve Door and flange, one end are equipped with the 5th valve 52 connection extracting manifold 40, and the other end leads directly to air or connection equipped with the 6th valve 53 Compressed air gas source.The distribution of extracting gang of wells can be optimized when device designs, pass through association extraction well 48 and independent extraction well 49 Setting, respectively strengthen " hot spot " and " cold spot " pollutant extracting collection.

The starting stage is run in device, pollutant concentration is higher in 1 Soil Surrounding of heated well, and the soil moisture is in heated well 1 effect is lower to be risen quickly again, and a large amount of pollutants can be transferred in soil gas from solid phase of soil.In view of independent extraction well 49 Again distant from this region, the pollutant in soil gas is difficult only effectively trapping by independent extraction well 49.At this moment need The 5th valve 52 between association extraction well 48 and extracting manifold 40 is opened, closes the 6th be connected with air or compressed air gas source Valve 53, the pollutant in the regional soil gas is quickly discharged through association extraction well 48 by vacuum action, prevents pollutant Escape into air and cause secondary pollution.Additionally due to the regional temperature is higher, is concentrated on and heated by association extraction well 48 Partial contamination thing near well 1 reaction such as can be pyrolyzed or hydrolyze under the action of heat and be consumed, so as to effective Reduce the load of follow-up ground pollution treatment facility.The middle and later periods is run in device, 1 Soil Surrounding temperature of heated well can reach first Target temperature, pollutant in soil concentration have been significantly reduced, and apart from the regional soil temperature of heated well 1 farther out not yet Target temperature can be reached.Need to close and extract the 5th valve 52 between manifold 40 at this time, open association extraction well 48 and air Or the 6th valve 53 of compressed air gas source connection, compressed air is intermittently injecting, or produced in underground by independent extraction well 49 Raw vacuum suction effect can take out a part of fresh air from air through association extraction well 48 and enter underground, add so as to add The thermal convection current effect of soil, improves heat-transfer effect, contributes to the soil away from 1 region of heated well between hot well 1 and independent extraction well 49 Earth is rapidly heated.Meanwhile the compressed air for entering underground through association extraction well 48 can also play disturbance wind action, drop In the microenvironment of low soil particle surface in soil gas pollutant concentration, so as to reduce its partial pressure, adsorption by soil can be promoted Pollutant desorption, improve repairing effect.

Horizontal 45 buried depth of well formula extraction well is at 0.2-0.5 meters or so, and hole diameter is generally in 50cm or so, and well spacing is generally in 2-5 Rice is, it is necessary to cover whole 16 surface of Polluted area.Sieve aperture or screen slot 46 are opened on well casing, well casing both ends are total with extracting by branch pipe 56 Pipe 40 is connected, and is mainly used for trapping the soil gas that vertical shaft type extraction well 43 fails to trap, further realizes to soil pollution Thing effectively prevents secondary pollution to the control of earth's surface loss.

Control to processing region subsurface flow is realized by the form of the periphery of restoring area in the original location setting water-stop curtain System.Water-stop curtain generally uses twin shaft or three axle concrete mixing piles 36, and depth is from earth's surface up to 16 bottom of target stains region At 1-2 meters of subordinate.The cement-soil-stirred pile 36 of generally use bilayer, first layer, that is, internal layer 37 are laid against restoring area, are used Cellular concrete is stirred pile driving construction, and the second layer, that is, outer layer 38 is arranged on first layer periphery about at 50cm, using common coagulation Soil is stirred pile driving construction.First layer cellular concrete mixing pile 36 utilizes relatively independent closed air bubbles in concrete bodies and good Good globality primarily serves water proof and heat-insulated effect, prevents peripheral underground water from being reduced as far as possible while entering processing region The heat loss of processing region around is answered in hot repair.Second layer normal concrete mixing pile 36 primarily serves the effect of water proof, prevents Peripheral underground water enters processing region.Underground caused by 36 constructional deficiency of cement-soil-stirred pile or cracking in order to prevent Water enters, and can also set well-points dewatering facility between two layers of mixing pile, logical 1-2 meters under precipitation depth to 16 bottom of Polluted area Crossing limited precipitation ensures that peripheral underground water will not enter processing region.The underground water that well-points dewatering facility extracts is defeated by pipeline Enter treatment unit for waste water.

Realized by the form of the setting of restoring area surface in the original location concrete layer 12 to processing region rainwash Control and the control of soil gas.12 horizontal extent of earth's surface concrete layer can generally exceed each side 1-2 meters of restoring area, with mixing Solidifying soil mixing pile 36 is tightly connected.Concrete layer 12 is set two layers, and lower floor 13 is cellular concrete, and thickness 15-30cm, primarily serves Water proof, trapping and heat-insulated effect, prevent surface rain etc. from entering processing region, and it is outer to prevent that soil gas from escaping or preventing Enclose air and enter extractor, while reduce hot repair as far as possible and answer the upward heat loss of processing region；Upper strata 14 is normal concrete, Thickness 10-20cm, primarily serves the effect of water proof and trapping.

Heated well 1 and vertical shaft type extraction well 43 installed in underground can be upward through after concrete layer 12 and be set with ground Apply connection.Concrete layer 12 sets service sleeve 15 in the equal preformed hole in the position that all pipelines pass through, hole in installation process, Preferably iron hoop, heated well 1 and vertical shaft type extraction well 43 pass through iron hoop, by filling out after concrete curing between iron hoop and well casing Bentonite 18 is filled to seal.So can effectively it reduce in heating process since soil and pipe fitting thermal expansion cause concrete bodies to break Split, influence sealing effect.

According to the difference of target contaminant property, the soil gas extracted can be sent directly into 17 Secondary Air of hot-blast stove into Mouth 20 carries out burning processing, or is re-fed into 17 secondary air inlet 20 of hot-blast stove after condensing recovery section pollutant and is fired Burning processing, or after condensing recovery section pollutant again by exhaust gas treatment unit after qualified discharge.The mesh that will be extracted Mark pollutant, which is sent into hot-blast stove 17 to strile-back, can not only cancel exhaust gas treatment unit, can also recycle the heat of organic pollution Value, it is energy-saving.

Multi-stage condensing separation equipment is flexibly set to pre-process the soil gas extracted according to actual conditions, in advance Most of pollutant burden is removed, mitigates follow-up exhaust-gas treatment facilities pressure.Multi-stage condensing separation equipment includes heat exchange condensation and sets Standby and gas-liquid separation equipment.First order condensation separation can utilize air to act on the natural cooling of ground extracting manifold 40, after An inertia-type gas-liquid separator i.e. level-one moisture trap 61 is connect, is pre-separated out the condensate liquid of higher temperature, is reduced follow-up The thermic load of condensation separation.Second level condensation separation is put using evaporation type air cooling tower 58 as heat exchange condensing plant, pipe heat exchanger In in tower, cooling-down effect is ensured by the heat exchange of the air of circulation, shower water and recirculated water, soil gas is further cooled down And condensed contaminants, and separated condensate liquid by inertia-type gas-liquid separator, that is, two level moisture trap 62 of postposition. Third level condensation separation using gas-liquid heat-exchange 59 as heat exchange condensing plant, made by the low temperature chilled water provided using handpiece Water Chilling Units 60 Soil gas temperature and deep condensation pollutant are further reduced by indirect heat exchanger for refrigerant, and it is used by what is be followed by Property formula gas-liquid separator, that is, three-level moisture trap 63 drop condensate liquid and separate.

Fixed gas after condensation separation is connected after deentrainment tower 64 with vacuum pump 42, then is sent into subsequently through vacuum pump 42 Exhaust gas treatment unit.Exhaust gas treatment unit primary attachment equipment is activated carbon adsorber 67, and fixed gas is removed by suction-operated In contaminant remaining after qualified discharge air, wind turbine 66 is set after adsorption plant.Adsorption plant front end goes out with vacuum pump 42 Mouth is connected by pipeline, which is equipped with gas sampling device 69.It is residual that deentrainment tower 64 is mainly used for removal on-condensible gas Remaining fine drop, further reduces the processing load of follow-up exhaust gas treatment unit, improves activated carbon adsorption efficiency, protects at the same time Vacuum pump 42 is from liquid corrosion.Vacuum pump 42 has certain overcurrent using the claw or Roots type vacuum pump 42 of dry type Heating ability, 42 Outlet Gas Temperature of vacuum pump slightly raises, but can substantially reduce the relative humidity of gas, contributes to follow-up Exhaust gas treatment unit activated carbon adsorption efficiency.

Activated carbon adsorber 67 sets drawer structure 68 using the drawer type design replaced easy to activated carbon, and activated carbon is inhaled Attached tower 67 is arranged to some levels of series connection, and every grade sets some activated carbon adsorbers 67 in parallel.Preferably, activated carbon adsorber 67, by two-stage series connection operation or two groups of forms in parallel switched, improve the utilization rate of exhaust gas active-carbon, strengthen anti-load impact Performance and operational flexibility.

Treatment unit for waste water is received before waste water, the device that two layers of cement-soil-stirred pile, 36 well-points dewatering produce heat Demister produces before condensate liquid and vacuum pump 42 that polluted underground water that Polluted area 16 extracts, condensation and separation process produce Collection liquid handled after qualified discharge.Consider waste water quality that whole hot repair process produces have complexity with it is various Property, and the variability of different phase waste water water quantity and quality is repaired, waste water treatment process is needed using relatively more flexible design shape Formula, concrete technology flow process are as follows：Water quality and quantity adjusting-gravity oil removal precipitation-advanced the chemical oxygen of dosing coagulation-precipitation/air supporting- Change-sand filtration-activated carbon filtering.

Treatment unit for waste water front end sets the regulating reservoir 70 with larger buffer capacity, and regulating reservoir 70 is all provided with different liquid levels There are water outlet 73 and thief hatch 74, according to the solid particulate matter such as possible lightweight oils, heavy oils and silt in waste water point Layer situation selects suitable water exit position, while can manually carry out the solid particulate matters such as lightweight oils, heavy oils and silt Discharge.Set after regulating reservoir 70 comprising coagulation area 75, precipitation-air-flotation area 76, the combination pond 71 in chemical oxidation area 77, consider field The complexity of waste water is produced in ground repair process, design of the pond 71 by multiple lattices is combined, realizes dosing coagulation, precipitation/gas The floating, different running method of chemical oxidation.Coagulation area 75 is equipped with the medicine machine 78 of dosing coagulant, is additionally provided with coagulation area 75 Blender.Tube settler and air floatation machine are equipped with precipitation-air-flotation area 76.Chemical oxidation area 77 is equipped with the dosing for adding oxidant Equipment 78.Sand filtration and carbon filtration equipment, preferably quartz filter 32 and active carbon filter 33, depth are set after combining pond 71 Processing further improves the treatment effeciency of pollutant.Treated waste water is discharged into 72 interim storage of discharge bay, after detection is up to standard Pipe of receiving discharges, and discharge bay 72 is equipped with water quality detection equipment 34.Processing equipments at different levels are respectively provided with bypass and surmount in treatment unit for waste water Pipeline 31, is adjusted flexibly easy to run operation.

Embodiment 2

A kind of concentrated combustion formula original position thermal desorption prosthetic device for contaminated site, includes burning heat transfer and waste heat recovery It is unit, extracting condensation and gas-liquid separation unit, subsurface flow control unit, soil gas control unit, exhaust gas treatment unit, useless Water treatment unit and pipeline.Burning heat transfer and waste heat recovery unit include hot-blast stove 17, gas-gas heat exchanger 5, air blower, air inducing Machine 6, exhaust tube 11 and heating gang of wells.Extracting condensation and gas-liquid separation unit include extracting gang of wells, heat exchange condensing plant, gas-liquid Separation equipment, deentrainment tower 64 and vacuum pump 42；Extract gang of wells and include some extracting well casings 41, extracting well casing 41 includes vertical peace Some vertical shaft type extraction wells 43 in contaminated site, and some horizontal strokes being horizontally arranged in 16 topsoil of Polluted area Well formula extraction well 45；Opened up respectively on extracting well casing 41 some along the evenly spaced sieve aperture in well casing direction or screen slot 46.Underground water Flow control unit includes the water-stop curtain for being arranged on the periphery of Polluted area 16 for needing to repair.Soil gas control unit is included and set Put the concrete layer 12 of the covering Polluted area 16 on the ground of contaminated site.Exhaust gas treatment unit includes adsorption plant and wind Machine 66.Treatment unit for waste water includes the regulating reservoir 70 set gradually, combination pond 71, sand filtration apparatus, carbon filtration equipment and discharge bay 72。

Burning heat transfer and waste heat recovery unit are using centralized hot-blast stove 17, the height that fuel combustion in hot-blast stove 17 is produced Warm wind is passed through the heating gang of wells of in-situ heat restoring area distribution as heat source is repaired, by adjusting burner load or adjusting 20 second valve 29 of secondary air inlet and 30 aperture of the 3rd valve and then adjusting cold flow, can adjust in the range of 200-700 DEG C Section produces the temperature of hot wind.Second valve 29 is arranged on the pipeline for being introduced directly into air, and the 3rd valve 30 is arranged on gas gas and changes On pipeline between the Secondary Air outlet 25 of hot device 5 and the secondary air inlet 20 of hot-blast stove 17.The introducing of centralized hot-blast stove 17 Material mainly includes fuel, combustion air and Secondary Air, and wherein combustion air is introduced by combustion fan 26 and thrown according to fuel Enter amount automatic adjustment, or adjust negative pressure introducing manually by the first valve 28；Fresh Secondary Air is adjusted manually by the second valve 29 Save negative pressure to introduce, or selected by the 3rd valve 30 after 5 cold side of gas-gas heat exchanger accesses, introduced by air intake blower fan 27.

High-temperature hot-air arranges 9 row of mouth after the heat exchange with heating gang of wells, from the hot wind of 3 upper end of well casing outer tube of heated well 1 Go out, the row mouthful 9 of the well casing of every group of heated well 1 sets hot wind regulating valve 10, and hot-blast main is connected to by heating resisting metal hose 79 44；It can be adjusted in operation by hot wind regulating valve 10, the circulation air quantity of the well casing of trim each group heated well 1, or according to reparation area The temperature conditions of domain different heating point carries out targetedly hot wind and adjusts.

The high-temperature hot-air discharged still has higher temperature in heating gang of wells, can be by the after being delivered to hot-blast main 44 The switching of four valves 35 chooses whether access 5 hot side of gas-gas heat exchanger, and the air intake blower fan 27 that the cold side of gas-gas heat exchanger 5 is equipped with exports It is connected with 20 pipeline of fresh secondary air inlet of centralized hot-blast stove 17, chooses whether to be connect by the switching of the 3rd valve 30 Enter；Cold side gas is preheated using the waste heat of high-temperature hot-air by gas-gas heat exchanger 5, so as to reduce centralized hot-blast stove 17 firing rate；Complete waste heat recovery or surmount the high-temperature hot-air of gas-gas heat exchanger 5 by air-introduced machine 6 i.e. high-temperature blower from row Inflator 11 is discharged.

Heating gang of wells is designed installation according to the pollution in in-situ immobilization region distribution, uses square intensive in plane The form of cloth, well spacing is at 1.5 meters；Matched in vertical direction with repairing depth, and exceed 0.5 meter of pollution depth.

According to contaminated sites distribution situation, place physical condition and device design feature, it is equipped with using a hot-blast stove 17 The configuration of multiple heated wells 1, multiple 1 parallel runnings of heated well, and the hot wind by being arranged on 1 hot wind of heated well row's mouth 9 are adjusted The hot blast rate that the adjusting of valve 10 enters each heated well 1 is as balanced as possible.

The well casing for heating the heated well 1 of gang of wells is inside and outside concentric sleeve type, using stainless steel；2 caliber 50 of inner tube Centimetre, bottom does not set bottom cover 4；125 centimetres of 3 caliber of outer tube, bottom sets bottom cover 4；20 centimetres of inner tube 2 and 3 bottom spacing of outer tube.Collection The inner tube 2 for the first well casing of heated well 1 of high-temperature hot-air that Chinese style hot-blast stove 17 produces from top to bottom is sent into the well casing bottom of heated well 1 Portion, then from bottom to top turned back to the well casing above ground portion of heated well 1 by the gap between inner tube 2 and outer tube 3, it is configured in outer tube Hot wind row's mouth 9 of 3 upper sides is discharged.There is the ring of about 15cm during the well casing installation of heated well 1 between the native hole of outer tube 3 and probing Gap, directly inserts quartz sand as filler 7 to ensure heat-transfer effect.

The soil gas that in-situ heat restoring area produces after heating is collected by extracting gang of wells, including two kinds of installation shapes Formula, one kind is vertical shaft type extraction well 43, is vertically mounted in contaminated site；One kind is horizontal well formula extraction well 45, is horizontally arranged at In 16 topsoil of Polluted area；Extracting well casing 41 uses stainless steel.

Vertical shaft type extraction well 43 is divided into association extraction well 48 and independent 49 two kinds of forms of extraction well, 48 well of association extraction well again Footpath 25cm, is arranged in a native hole with heated well 1, and fitting depth is consistent, and top sets threeway 51, and both ends outlet is respectively provided with valve Door, one end are equipped with the 5th valve 52 connection extracting manifold 40, and the other end is equipped with the 6th valve 53 connection compressed air gas source；It is independent 49 hole diameter 100cm of extraction well, is arranged between heated well 1 (" cold spot " farthest apart from neighbouring heat source), uniform according to site condition Arrangement, fitting depth, which exceedes, repairs depth 1m, is used before heating as dewatering well 39；By optimizing association when device designs The distribution of extraction well 48 and independent extraction well 49 is set, and adjusts association extraction well 48 and solely in the different phase of heating operation The 5th valve 52 and the 7th valve 54 between vertical extraction well 49 and extracting well casing 41, strengthen " hot spot " and " cold spot " pollution respectively The extracting of thing is collected.

The heating operation starting stage, under high temperature action, a large amount of pollutants can be from solid phase of soil in 1 Soil Surrounding of heated well It is transferred in soil gas, this partial contamination thing is difficult effectively to trap, it is necessary to open association extraction well by independent extraction well 49 The 5th valve 52 between 48 and extracting manifold 40, closes the 6th valve 53 being connected with compressed air gas source, passes through vacuum action The pollutant in 1 neighboring area soil gas of heated well is quickly discharged through association extraction well 48；Heating operation middle and later periods, heated well 1 neighboring area soil has reached target temperature, and pollutant concentration is significantly reduced, it is necessary to close and extract the 5th between manifold 40 Valve 52, interval open 53 injecting compressed air of the 6th valve that association extraction well 48 is connected with compressed air gas source, have increased and have added The thermal convection current effect of soil, improves heat-transfer effect between hot well 1 and independent extraction well 49, accelerates " cold spot " heating；Meanwhile through association The fresh air that extraction well 48 enters underground can also play disturbance wind action, reduce in the microenvironment of soil particle surface The concentration (partial pressure) of pollutant in soil gas, promotes the desorption of soil pollutant, improves repairing effect.

Horizontal 0.2 meter, hole diameter 50cm of 45 buried depth of well formula extraction well, 2 meters of well spacing is, it is necessary to cover whole 16 table of Polluted area Face.Well casing both ends are connected by branch pipe 56 with extracting manifold 40, and set switch valve 57, can be according to operating condition selection No access extraction system.Horizontal well formula extraction well 45 is mainly used for trapping the soil gas that vertical shaft type extraction well 43 fails to trap, Realize the control to soil pollutant to earth's surface loss, effectively prevent secondary pollution.

The well casing of the well casing of vertical shaft type extraction well 43 and horizontal well formula extraction well 45 is open-porous metal pipe, wherein, extraction well The perforate pipeline section of pipe 41 is downwards until at the above 0.3m of bottom from below ground 0.5m, and horizontal extraction tube is in addition to pipeline junction It is perforate or the joint-cutting pipeline section that sieve aperture or screen slot 46 are set.

By setting water-stop curtain to realize the control to peripherally descending current, water-stop curtain is deep to in-situ immobilization area periphery Underground water barrier, and reach target and repair 2m below depth；Water-stop curtain is constructed using twin shaft cement-soil-stirred pile 36, and is set Double-decker；First layer, that is, internal layer 37 is laid against restoring area edge, and pile driving construction is stirred using cellular concrete；Second Layer is that outer layer 38 is arranged on first layer periphery about at 0.5m, and pile driving construction is stirred using normal concrete；Meanwhile to prevent from mixing Groundwater infiltration caused by solidifying soil 36 constructional deficiency of mixing pile or cracking, sets dewatering well between two layers of mixing pile 39,2m under precipitation depth to 16 bottom of Polluted area, ensure that peripheral underground water will not enter by limited precipitation and repair Region.

After water-stop curtain is built well, wellhole probing is carried out according to heating gang of wells and the arrangement of vertical shaft type extracting gang of wells；Per complete Into the probing of a wellhole, the well casing installation of this mouthful of well is carried out immediately, and the stone of 2-5mm particle diameters is inserted after well casing is in place, in wellhole Sand 50 fills bentonite 18 to ground and carries out sealing of hole up to below ground 300mm.

After completing installation of the heating gang of wells with extracting gang of wells, region and in-situ immobilization between water-stop curtain double-decker Region carries out precipitation, and precipitation depth is at least 1m below reparation depth；Reparation place equipped with independent extraction well 49, can be by independence Extraction well 49 uses early period in reparation as dewatering well 39.

After the completion of precipitation, arranged in gang of wells gap and excavate the groove of the horizontal well formula extraction well 45 of 100mm wide 200mm depths 55, the interior quartz sand 50 for being laid with 10cm thickness 2-5mm particle diameters of groove 55, and laid among layer of sand and horizontal well formula extraction well 45 is installed Well casing, and the bentonite 18 for filling 10cm thickness carries out groove 55 and closes；Groove 55 excavates the soil produced and paves in non-excavation area Domain.

After the installation for completing horizontal 45 groove 55 of well formula extraction well, it is thick to be successively laid with two layers of each 20cm for restoring area in the original location Concrete layer 12, wherein, use gas with the concrete layer 12 i.e. lower floor 13 of concrete layer 12 that soil to be repaired directly contacts Bubble concrete is made, and completes to be laid with the upper strata of the normal concrete composition concrete layer 12 of 20cm thickness after conserving on the top again 14；It is pre-buried around the well casing of heated well 1 and the well casing of vertical shaft type extraction well 43 to compare well in the process of deployment of concrete layer 12 The service sleeve 15 of the big 50mm of pipe diameter, is preferably steel service sleeve, by filling bentonite between service sleeve 15 and well casing 18 sealings, effectively reduce the possibility for causing concrete bodies to rupture due to soil and pipe fitting thermal expansion in heating process.

Set multi-stage condensing separation equipment to pre-process the soil gas extracted according to actual conditions, remove in advance Most of pollutant burden, mitigates follow-up exhaust-gas treatment facilities pressure.

Extracting gang of wells is connected to extracting manifold 40 by heating resisting metal hose 79, and extracting manifold 40 is designed by certain slope, Lower is connected to level-one moisture trap 61, using environmental ambient air natural cooling, what level-one moisture trap 61 was isolated Condensed fluid is delivered to treatment unit for waste water by elevator pump 65, and fixed gas enters subsequent condensation separation equipment.

Evaporation is entered as main heat exchange condensation process equipment, the on-condensible gas of preamble unit using evaporation type air cooling tower 58 The condenser coil of formula air cooling tower 58, cooling water form moisture film outside coil pipe, pass through evaporation and heat through water pump lifting and nozzles spray Exchange and absorb high-temperature gas heat；In operational process, evaporability is strengthened by the axial flow blower forced ventilation at the top of evaporator； Condensate outlet pipeline is designed by certain slope, and lower is connected to two level moisture trap 62, in two level moisture trap 62 Condensate liquid is delivered to treatment unit for waste water by elevator pump 65, and fixed gas enters subsequent condensation separation equipment.

Using gas-liquid heat-exchange 59 and handpiece Water Chilling Units 60 as depth heat exchange condensation process equipment, by evaporation type air cooling tower 58 and the remaining fixed gas after gas-liquid separation, pass through gas-liquid heat-exchange 59 and occur with the low temperature chilled water that handpiece Water Chilling Units 60 provide Heat exchange, further reduces gas temperature, improves condensation efficiency；Condensate outlet pipeline is designed by certain slope, lower connection To three-level moisture trap 63, the condensate liquid in three-level moisture trap 63 is delivered to treatment unit for waste water by elevator pump 65, Fixed gas enters in deentrainment tower 64 the remaining fine drop removed in gas, is then expelled to by dry vacuum pump 42 at exhaust gas Manage unit；Gas-liquid heat-exchange 59 is front and rear condensed gas is set surmount pipeline and valve, can flexibly be selected according to operating condition be It is no to enable.

In addition, according to the difference of target contaminant property, the soil gas extracted can also be selected by valve transfer It is directly accessed 17 secondary air inlet of hot-blast stove, 20 pipeline and carries out burning processing；Or sent again after condensing recovery section pollutant Enter 17 secondary air inlet of hot-blast stove, 20 pipeline and carry out burning processing.The target contaminant extracted is sent into hot-blast stove 17 and is strile-backd Exhaust gas treatment unit can not only be cancelled, the calorific value of organic pollution can also be recycled, it is energy-saving.

Exhaust-gas treatment major process unit is used as using activated carbon adsorber 67, activated carbon adsorber 67 is using easy to activity The drawer type design that charcoal is replaced sets drawer structure 68.Activated carbon adsorber 67 is arranged to some levels of series connection, every grade of setting Some activated carbon adsorbers 67 in parallel.Preferably, activated carbon adsorber 67 is run by two-stage series connection or two groups of parallel connections switch Form, improve the utilization rate of exhaust gas active-carbon, strengthen anti-load impact performance and operational flexibility.The activity of serial or parallel connection Charcoal adsorption tower 67 forms adsorption plant, sets wind turbine 66 thereafter.Adsorption plant front end exports with vacuum pump 42 and is connected by pipeline, The connecting pipe is equipped with gas sampling device 69.

Treatment unit for waste water front end sets the oil removal sedimentary adjustive pool 70 with larger buffer capacity, and regulating reservoir 70 is in difference Liquid level is equipped with water outlet 73 and thief hatch 74, according to the solid such as possible lightweight oils, heavy oils and silt in waste water Particulate matter delamination selects water exit position, while can manually carry out the solid particles such as lightweight oils, heavy oils and silt The discharge of thing；Set comprising coagulation area 75, precipitation-air-flotation area 76, the combination pond 71 in chemical oxidation area 77, consider after regulating reservoir 70 The complexity of waste water is produced during site remediation, coagulating sedimentation and dosing are realized in combination pond 71 by the design of multiple lattices The different running method of reaction；Coagulation area 75 is equipped with the medicine machine 78 of dosing coagulant, and blender is additionally provided with coagulation area 75. Tube settler and air floatation machine are equipped with precipitation-air-flotation area 76.Chemical oxidation area 77 is equipped with the medicine machine 78 for adding oxidant. Sand filtration and carbon filtration equipment are set after combining pond 71, are preferably quartz filter 32 and active carbon filter 33, advanced treating into One step improves the treatment effeciency of pollutant；Treated waste water is discharged into 72 interim storage of discharge bay, and pipe of being received after detection is up to standard is arranged Put, discharge bay 72 is equipped with water quality detection equipment 34；Processing equipments at different levels are respectively provided with bypass and surmount pipeline 31 in treatment unit for waste water, It is adjusted flexibly easy to run operation.

Concentrated combustion formula original position thermal desorption prosthetic device provided by the utility model for contaminated site, can overcome existing There is thermal desorption recovery technique in situ existing deficiency in practical applications, reach using conventional fuel as energy source, using energy source It is efficient, place subsurface flow is easy to control, soil gas can be trapped effectively, pollutant condensation recycling and pollutant treatment efficiency It is high, appliance arrangement is simple and safe, secondary pollution is controllable, repairing effect is good and other effects.

Although the content of the utility model is discussed in detail by above preferred embodiment, but it should be appreciated that on The description stated is not considered as the limitation to the utility model.After those skilled in the art have read the above, for A variety of modifications and substitutions of the utility model all will be apparent.Therefore, the scope of protection of the utility model should be by appended Claim limit.

Claims (10)

1. A kind of 1. concentrated combustion formula original position thermal desorption prosthetic device for contaminated site, it is characterised in that the device bag Heat transfer containing burning and waste heat recovery unit, extracting condensation and gas-liquid separation unit, subsurface flow control unit, soil gas control Unit, exhaust gas treatment unit, treatment unit for waste water and pipeline；

   The burning heat transfer and waste heat recovery unit include hot-blast stove, gas-gas heat exchanger, air blower, air-introduced machine, exhaust tube with And heating gang of wells；

   The extracting condensation and gas-liquid separation unit include extracting gang of wells, heat exchange condensing plant, gas-liquid separation equipment, deentrainment tower And vacuum pump；The extracting gang of wells includes some extracting well casings, and the extracting well casing includes some vertical shaft type extraction wells, And some horizontal well formula extraction wells；Opened up respectively on the extracting well casing some along the evenly spaced sieve aperture in well casing direction or sieve Seam；

   The subsurface flow control unit includes the water-stop curtain for being arranged on the Polluted area periphery for needing to repair；

   The soil gas control unit includes the concrete layer for the covering Polluted area being arranged on the ground of contaminated site；

   The exhaust gas treatment unit includes adsorption plant and wind turbine；

   The treatment unit for waste water includes the regulating reservoir set gradually, combination pond, sand filtration apparatus, carbon filtration equipment and water outlet Pond.
2. 2. it is used for the concentrated combustion formula original position thermal desorption prosthetic device of contaminated site as claimed in claim 1, it is characterised in that The burning heat transfer and waste heat recovery unit, its hot-blast stove are equipped with combustion air inlet, secondary air inlet and hot-blast outlet；Institute The gas-gas heat exchanger stated is equipped with hot wind inlet, cold wind import, exhaust outlet and Secondary Air outlet, and Secondary Air outlet passes through pipe The secondary air inlet of road and hot-blast stove connects；The heating gang of wells includes some heated wells, and the heated well is equipped with heat Wind entrance and hot wind row's mouth, the hot-wind inlet of heated well are connected by the hot-blast outlet of pipeline and hot-blast stove respectively, heated well Hot wind row's mouth is connected by pipeline with exhaust tube or gas-gas heat exchanger hot wind inlet respectively, the exhaust outlet of gas-gas heat exchanger also by Pipeline is connected with exhaust tube；The exhaust tube is connected with air-introduced machine；The air blower includes combustion fan and air intake blower fan, The combustion fan is installed at the combustion air inlet of hot-blast stove, and the air intake blower fan is installed on the cold of gas-gas heat exchanger At wind inlet.
3. 3. it is used for the concentrated combustion formula original position thermal desorption prosthetic device of contaminated site as claimed in claim 2, it is characterised in that The heated well, it to subsurface, vertical or is obliquely installed in contaminated site from ground；The heated well is inside and outside concentric Sleeve structure, comprising outer tube and inner tube, leaves annular gap, the bottom of inner tube between the madial wall of outer tube and the lateral wall of inner tube Higher than outer pipe bottom, outer pipe bottom is equipped with bottom cover, and interior bottom of the tube is not set the opening of bottom cover；The outer tube is installed on Pollution Field It is pre-set by ground native hole downwards, annular gap is left between the lateral wall of outer tube and native hole madial wall in ground, its Inside it is filled with filler.
4. 4. it is used for the concentrated combustion formula original position thermal desorption prosthetic device of contaminated site as claimed in claim 1, it is characterised in that The extracting condensation and gas-liquid separation unit, it extracts gang of wells and is connected by pipeline with heat exchange condensing plant, and gas-liquid separation is set The standby rear end for being arranged on heat exchange condensing plant, sets gradually deentrainment tower and true after heat exchange condensing plant and gas-liquid separation equipment Sky pump；The heat exchange condensing plant includes evaporation type air cooling tower and gas-liquid heat-exchange；The gas-liquid separation equipment is inertia Gas-liquid separator；Vacuum is entered after deentrainment tower by the fixed gas after gas-liquid separation equipment and heat exchange condensing plant condensation separation Pump, be sent into follow-up exhaust gas treatment unit through vacuum pump again, and the condensed fluid after separation passes through pipeline to treatment unit for waste water； The extracting gang of wells, the secondary air inlet that its soil gas extracted is sent into hot-blast stove by pipeline burn, or warp Cross after heat exchange condensing plant and gas-liquid separation equipment condensation recycling and feed gas into the secondary air inlet of hot-blast stove again and burn, Or by heat exchange condensing plant and gas-liquid separation equipment condensation recycling after again by exhaust gas treatment unit after discharge.
5. 5. it is used for the concentrated combustion formula original position thermal desorption prosthetic device of contaminated site as claimed in claim 4, it is characterised in that The extracting gang of wells, if its vertical shaft type extraction well is separately mounted to the pre-set dry ground by ground downwards in contaminated site In hole；Quartz sand is filled between the lateral wall of the well casing of vertical shaft type extraction well and the madial wall in native hole and is filled out at the top of quartz sand Fill bentonite to ground and carry out sealing of hole；The vertical shaft type extraction well includes two kinds of association extraction well and independent extraction well, each Association extraction well and a heated well are arranged in a native hole, and each independent extraction well is provided separately within a native hole.
6. 6. it is used for the concentrated combustion formula original position thermal desorption prosthetic device of contaminated site as claimed in claim 5, it is characterised in that The extracting gang of wells, its horizontal well formula extraction well are separately positioned on some horizontal channels dug in Polluted area topsoil It is interior；Well casing both ends are respectively equipped with branch pipe, are connected by branch pipe with extracting manifold, stone is filled between the lateral wall and soil of well casing Sand, filling bentonite in the groove above quartz sand.
7. 7. it is used for the concentrated combustion formula original position thermal desorption prosthetic device of contaminated site as claimed in claim 1, it is characterised in that The subsurface flow control unit, its water-stop curtain are made of twin shaft or three axle concrete mixing piles；The concrete Mixing pile sets from ground to underground vertical and forms wall type structure and surrounds Polluted area；The cement-soil-stirred pile is equipped with Bilayer, internal layer use cellular concrete, and outer layer uses normal concrete.
8. 8. it is used for the concentrated combustion formula original position thermal desorption prosthetic device of contaminated site as claimed in claim 1, it is characterised in that The soil gas control unit, its concrete layer are tightly connected with the cement-soil-stirred pile；The concrete layer It is divided into two layers up and down；Lower floor is cellular concrete, and upper strata is normal concrete.
9. 9. it is used for the concentrated combustion formula original position thermal desorption prosthetic device of contaminated site as claimed in claim 1, it is characterised in that The exhaust gas treatment unit, its adsorption plant and fans in series；The adsorption plant includes some activated carbon adsorbers；Institute The activated carbon adsorber serial or parallel connection stated is set.
10. 10. being used for the concentrated combustion formula original position thermal desorption prosthetic device of contaminated site as claimed in claim 1, its feature exists In the treatment unit for waste water, it is cell structure that it, which combines pond, and each lattice are set to coagulation area, precipitation-air-flotation area, chemical oxygen successively Change area；The regulating reservoir is by the gravity oil removal sedimentary adjustive pool of each component precipitated and separated in sewage by gravity； The sand filtration apparatus is quartz filter；The carbon filtration equipment is active carbon filter.