CN205289226U - A normal position thermal desorption system for handling VOCSVOC pollutes soil - Google Patents
A normal position thermal desorption system for handling VOCSVOC pollutes soil Download PDFInfo
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- CN205289226U CN205289226U CN201521119238.2U CN201521119238U CN205289226U CN 205289226 U CN205289226 U CN 205289226U CN 201521119238 U CN201521119238 U CN 201521119238U CN 205289226 U CN205289226 U CN 205289226U
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Abstract
The utility model relates to a normal position thermal desorption system for handling VOCSVOC pollutes soil, extract collecting system, insulating layer, waste gas treatment system, condensate processing system, condensate circulation system, active carbon adsorption system and tail gas discharge system including heating system, organic steam, wherein, heating system comprises a plurality of gas heating pipes, and is right through the fuel burning the contaminated soil of outer heating indirect heating of heating pipe, organic steam extracts the collecting system, catches to promote to evaporate along with the temperature to break away from the carrier and get into the organic pollutant of gaseous phase, organic pollutant is in by being handled among waste gas treatment system and the condensate processing system, the tail gas that obtains is discharge to reach standard after the active carbon adsorption system handles. Adopt this utility model processing can shown the on -the -spot VOCSVOC gas of reduction restoration by organic compound pollution soil and volatilize to the influence in constructor and all ring edge borders, avoid secondary pollution.
Description
Technical field
This utility model design technical field of soil remediation, particularly relates to a kind of for processing the in-situ heat desorption system of VOC (VOC)/semi-volatile organic compounds (SVOC) contaminated soil.
Background technology
Thermal desorption studio is by direct or indirect heat exchange, VOC (VOC) in soil/semi-volatile organic compounds (SVOC) pollutant are heated to enough temperature, make pollutant be volatilized from pollution medium or separate, enter the process of gas handling system. It is to be the physical separating process of another phase by pollutant from a phase transformation, in repair process and occur without the destruction to pollutant. The pollutant that this technology can process include volatility and half volatile organic contaminant, volatile heavy metal (hydrargyrum), pesticide, high boiling point organo-chlorine pollutant such as Polychlorinated biphenyls, dioxin etc.
The application mode of thermal desorption is very flexible, both can be used in original position, it is also possible to apply in dystopy. In-situ heat desorption refers to thermal desorption system construction in contaminated land original position, and utilization is used in combination, with gas phase extraction technique, the purpose reaching to remove polluter from pollution medium. Dystopy thermal desorption is then excavated by contaminated soil, and transport, to thermal desorption unit, heats volatile pollutants matter.
Dystopy thermal desorption processes to be needed to transport with the excavation of contaminated soil, very likely causes bigger secondary pollution event for the organic pollution that volatility is bigger. Soil then need not be excavated by in-situ heat desorption system, and the disturbance of Polluted area is less, it is possible to the safer reliable pollutant to on-site are removed.
The greatest problem that exhaust treatment system faces is that cooling rate is fast not, is easily generated the side-products such as dioxin in tail gas. Exhaust treatment system adopts the mode of spraying cooling to lower the temperature rapidly condensation organic steam, makes the tail gas of the overwhelming majority enter in spray process in condensed fluid, in tail gas remaining pollutant by activated carbon adsorption system process up to standard after outer arrange.
Activated carbon adsorption mode is one of common method processing thermal desorption tail gas.Its feature is that adsorption efficiency is high, widely applicable, can process multiple mix waste gas simultaneously; Producing less secondary pollution, stable performance in running, treatment effeciency is high; And equipment investment is few, easy to maintenance, plant maintenance is convenient. But simultaneously for major part user, the activated carbon lost efficacy after using is owing to lacking special equipment, it is impossible to regeneration, therefore operating cost is higher.
Utility model content
In view of this, main purpose of the present utility model is in that to provide a kind of in-situ heat desorption system for processing VOC/SVOC contaminated soil, with avoid excavation, can manipulation in situ reliably repair process organic polluted soil.
For reaching above-mentioned purpose, the technical solution of the utility model is achieved in that
A kind of in-situ heat desorption system for processing VOC/SVOC contaminated soil, including heating system, waste gas collecting system, thermal insulation layer, exhaust treatment system, condensation liquid treating system, condensate circulation system, activated carbon adsorption system and exhaust emission system; Wherein, described heating system is made up of multiple gas heating pipes, by fuel combustion, the described outer layer heating adding heat pipe is heated contaminated soil indirectly; System is collected in described organic steam extracting, catches and promotes, with temperature, the organic pollution that evaporation departs from carrier and enters gas phase; Described organic pollution is processed in described exhaust treatment system and condensation liquid treating system, and the tail gas obtained is qualified discharge after activated carbon adsorption system processes.
Wherein, described gas heating pipe, it is made up of flue gas section heating muff, burning zone instlated tubular, nozzles and gas heating pipe control chamber further. Described heating muff is stainless steel, and its trocar sheath is carbon steel material. Described trocar sheath is closed and is provided with fume emission mouth on upper top.
Described gas heating pipe control chamber is for adding the control of heat pipe self, and it includes adding armature assembly in thermal management device and data memory device and transmission.
Described gas heating pipe control chamber, is additionally operable to control Site Detection instrument.
Described exhaust treatment system, cools down radiator, pipe bundle condenser, refrigerant condenser, separatory groove, transition tank, pneumatic filter, vacuum pump, active carbon adsorber, micronic filter, air-introduced machine and chimney including three separatory tanks, two air.
Described thermal insulation layer is made up of silicate aluminum board heat-insulation layer and concrete; Wherein lower floor is silicate aluminum board heat-insulation layer, and thickness is not more than 100mm; Upper strata is concrete shield, and thickness is not more than 50mm.
In-situ heat desorption system for processing VOC/SVOC contaminated soil provided by the utility model, has the advantage that
Adopt this in-situ heat desorption system can avoid the soil of contaminated soil excavation, original position disposal reliably repair process organic contamination, it is possible to substantially reduce the on-the-spot VOC/SVOC gaseous volatilization impact on workmen and surrounding enviroment of reparation, it is to avoid secondary pollution.
Accompanying drawing explanation
Fig. 1 is this utility model in-situ heat desorption system principle and heating system know-why schematic diagram;
Fig. 2 is that this utility model in-situ heat desorption system runs schematic diagram;
Heating (pipe) system that Fig. 3 is this utility model in-situ heat desorption system lays schematic diagram with waste gas collecting system;
Fig. 4 is this utility model in-situ heat desorption system tail gas treating unit order of connection schematic diagram.
[primary clustering symbol description]
1: flue gas
2: air
3: natural gas
4: enter after-treatment system
5: thermocouple
6: thief hatch
7: enter after-treatment system.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment of the present utility model, this utility model in-situ heat desorption system is described in further detail.
Fig. 1 is this utility model in-situ heat desorption system principle and heating system know-why schematic diagram. Fig. 2 is that this utility model in-situ heat desorption system runs schematic diagram. Heating (pipe) system that Fig. 3 is this utility model in-situ heat desorption system lays schematic diagram with waste gas collecting system. Fig. 4 is this utility model in-situ heat desorption system tail gas treating unit order of connection schematic diagram.
With reference to shown in Fig. 1, in-situ heat desorption system, specifically includes that (well) system, thermal insulation layer, exhaust treatment system, condensation liquid treating system, condensate circulation system, activated carbon adsorption system and tail gas discharge system are collected in heating (pipe) system, waste gas collecting system and organic steam extracting.
With reference to shown in Fig. 1��Fig. 4, described in-situ heat desorption system is built in position, contaminated soil is heated by the hot channel that adds relied primarily in heating system, by the burning indirect evaporation organic pollution of fuel, and utilize organic steam extracting collection system that the organic steam evaporated is collected; The organic gas cooling of spray system in exhaust system collected, major part condensation becomes liquid phase, enters condensed fluid; The treated Posterior circle up to standard of condensed fluid uses; Residual exhaust is qualified discharge after activated carbon adsorption system processes. Described heating system and organic steam extracting are taken out collecting system and are laid in Polluted area original position side by side, and are collected respectively by two cover system pipelines. For promoting the efficiency of heating surface, and ensureing site safety, region laid by pipeline need to lay thermal insulation layer and concrete cover.
The gas heating pipe of in-situ heat desorption system, is mainly made up of flue gas section heating muff, burning zone instlated tubular, nozzles and gas heating pipe control chamber etc. The igniting of natural gas, close down and display and the transmission of the data such as parameter monitoring realize mainly through control chamber; Nozzles are generally processed by hard refractory material, cylindrical, it is possible to making combustion flame is that strip is conducive to flame in the heat transmission added in heat pipe. Burning zone instlated tubular is generally made up of trocar sheath, inner sleeve, telescopic refractory brick and burner, is mainly used in realizing flame combustion and external heat insulating function, also has air duct to be thermally shielded in internal and external casing, and generally this section of tube wall temperature is not higher than 40 DEG C. Flue gas section heating muff is made up of the sleeve pipe that internal diameter is different, inner sleeve bottom opening, adopts stainless steel; Fume emission mouth is closed and set on upper top to trocar sheath, adopts carbon steel material. Described gas heating pipe control chamber, for adding the control of heat pipe self, it includes adding armature assembly in thermal management device and data memory device and transmission. It is additionally operable to control Site Detection instrument, the isoparametric instruction of carbon monoxide (CO) content and signal collection, storage and transmission in gas pressure, flow, flue-gas temperature, the soil moisture, flue gas.
With reference to shown in Fig. 4, the exhaust treatment system of described in-situ heat desorption system, is mainly cooled down radiator, pipe bundle condenser, refrigerant condenser, separatory groove, transition tank, pneumatic filter, vacuum pump, active carbon adsorber, micronic filter and air-introduced machine and chimney etc. formed by three separatory tanks, two air. The major function of separatory tank be by cooling after water (containing Organic substance) be automatically separated by liquidometer, liquid-level indicating controller;Air cooler adopts multiple rows of coiled structure and heat radiating fin structure design, strengthens the heat exchange area of air cooling, adopts active fans and atomized water spray structural design simultaneously, strengthens radiating rate and the cooling effect of high-temperature gas. Pipe bundle condenser adopts resistance to low-pressure designs, adopts indirect heat exchange, and coolant adopts low boiling organic reagent to make refrigeration carrier, and cold-producing medium is circulated by compressing fridge, thus realizing the circulation of refrigerant vapor-compression-gasification, reaches the effect of deep condensation. Vacuum pump function is that increasing system is bled effect and extracting power. Active carbon adsorber function is the process being undertaken a small amount of organic gas of residual in cooled and condensed gas adsorbing and purifying.
Tail gas treating unit for the mixing gas of moisture vapor, pollutant after heated, the extracting by contaminated site, cooled, separatory, condensation procedure, will the process that is easily separated of mixing gas. Organic pollution is collected then through sedimentation, separatory and finally carries out burning final disposal by the liquid after separated, and fresh water (FW) includes municipal sewage pipe network comprehensive discharge in; Cooled and condensed air (containing minimal residue organic component) finally discharges then through after activated carbon adsorption.
In-situ heat desorption system also includes automatic control system and online temperature monitoring system, and running situation can carry out on-line monitoring simulation process effect.
Wherein, thermal desorption exhaust treatment system includes separatory tank, oil-to-air heat exchanger, compression refrigerator and condenser, vacuum pump, filter, adsorption tanks, high efficiency particle air filter, lead-over groove.
The laying principle adding heat pipe and extraction tube is: to add point centered by heat pipe, each adds 4 extraction tubes around heat pipe, and the arrangement of extraction tube is square, each heating tube pitch 1.6m, each extraction tube spacing 1.6m, whole each region is according to square matrix arrangement, as shown in Figure 3.
In embodiment of the present utility model, adding heat pipe is bilayer sleeve, interior pipe tubing 306 rustless steel, outer tube material carbon steel, outer tube caliber is aerial parts ��=150mm, under ground portion ��=120mm, pipe well boring ��=135mm, drilling depth designs according to pollution depth (h-0.25) m, rig is 30-C rig, first determines a top mark height with level gauge before boring, determines absolute altitude at the bottom of hole by the core taken out, determining hole depth with weight, chi, deviation controls within 50mm. Aperture: reality steel ruler checks orifice diameter. Core: after rig gets out core, measures core with chi long. Position offsets: with the stake holes position after pile, measures actual checking and is as the criterion. Vertical degree of the peg hole: checking rig vertical shaft kelly, with hanging the actual dipstick metering of vertical line, deviation controls within 0.5%. For effectively controlling vertical degree of the peg hole, driller insertion should be smooth, and drill rod axis should be directed at drill center line, and drilling rod should be vertical.
For preventing deep layer drill crimp after boring formation, heat pipe pipe laying will be added as early as possible to designated depth, and at mouth of pipe place, ground with the fixing well casing of concrete sealing.
Extraction tube is monolayer tool seam carbon steel pipe, well casing length is equal with central heating tube pipe range, extraction tube caliber 40mm, drilling equipment is Geoprobe rig, hollow screw is utilized to creep into, applying power drill by hydraulic hammer to enter and reach projected depth, after hole, pipe laying, to designated depth, and fixes well casing at mouth of pipe place, ground with concrete sealing as early as possible. 100 order stainless steel meshs are wrapped up at extraction tube tool seam place, fasten every 2m rustless steel pipe collar.
Thermal insulation layer is made up of silicate aluminum board heat-insulation layer and concrete; Its lower floor is silicate aluminum board heat-insulation layer, and thickness is not more than 100mm, and upper strata is concrete shield, and thickness is not more than 50mm. Described heat-insulation layer be laid in plate-like heat-insulation layer laying method, be laid immediately on structure sheaf or vapour barrier, layering lay time upper and lower two-layer plate seam should stagger, the edges of boards consistency of thickness that surface is two pieces adjacent. It is typically on block insulation layer and looks for slope with loose material is wet.
The heating region ground epithelium healing pipeline respectively fuel gas pipeline of in-situ heat desorption system, water-gas stripping gas pipeline, gas stripping gas pipeline three class. Wherein, the heating fuel that fuel gas pipeline is thermal desorption system provides pipeline, water-gas stripping gas pipeline is the pipeline connecting extraction tube, it is mainly used in the extracting after underground pollution thing heating and gasifying, gas stripping gas pipeline is near the thin extraction tube adding heat pipe insertion subsurface 300mm��400mm, is mainly used in a large amount of water vapour at extracting heating initial stage.
The detection system of the disposal effect of in-situ heat desorption repair system, main monitoring by thermocouple probe forms with stripping gas sample detecting two parts, hygrosensor is the thermocouple probe being distributed in contaminated soil different depth, adding in heat pipe different depth and flue, and stripping gas sample detecting is the airway being laid in different depth contaminated soil.
The above, be only preferred embodiment of the present utility model, is not intended to limit protection domain of the present utility model.
Claims (8)
1. the in-situ heat desorption system being used for processing VOC/SVOC contaminated soil, it is characterized in that, including heating system, waste gas collecting system, thermal insulation layer, exhaust treatment system, condensation liquid treating system, condensate circulation system, activated carbon adsorption system and exhaust emission system; Wherein, described heating system is made up of multiple gas heating pipes, by fuel combustion, the described outer layer heating adding heat pipe is heated contaminated soil indirectly; Described waste gas collecting system, catches and promotes, with temperature, the organic pollution that evaporation departs from carrier and enters gas phase; Described organic pollution is processed in described exhaust treatment system and condensation liquid treating system, and the tail gas obtained is qualified discharge after activated carbon adsorption system processes.
2. the in-situ heat desorption system for processing VOC/SVOC contaminated soil according to claim 1, it is characterised in that described gas heating pipe, is made up of flue gas section heating muff, burning zone instlated tubular, nozzles and gas heating pipe control chamber further.
3. the in-situ heat desorption system for processing VOC/SVOC contaminated soil according to claim 2, it is characterised in that described heating muff is stainless steel, and its trocar sheath is carbon steel material.
4. the in-situ heat desorption system for processing VOC/SVOC contaminated soil according to claim 3, it is characterised in that described trocar sheath is closed and is provided with fume emission mouth on upper top.
5. the in-situ heat desorption system for processing VOC/SVOC contaminated soil according to claim 2, it is characterized in that, described gas heating pipe control chamber is for adding the control of heat pipe self, and it includes adding armature assembly in thermal management device and data memory device and transmission.
6. the in-situ heat desorption system for processing VOC/SVOC contaminated soil according to claim 5, it is characterised in that described gas heating pipe control chamber, is additionally operable to control Site Detection instrument.
7. the in-situ heat desorption system for processing VOC/SVOC contaminated soil according to claim 1, it is characterized in that, described exhaust treatment system, cools down radiator, pipe bundle condenser, refrigerant condenser, separatory groove, transition tank, pneumatic filter, vacuum pump, active carbon adsorber, micronic filter, air-introduced machine and chimney including three separatory tanks, two air.
8. the in-situ heat desorption system for processing VOC/SVOC contaminated soil according to claim 1, it is characterised in that described thermal insulation layer is made up of silicate aluminum board heat-insulation layer and concrete; Wherein lower floor is silicate aluminum board heat-insulation layer, and thickness is not more than 100mm; Upper strata is concrete shield, and thickness is not more than 50mm.
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| CN106216381A (en) * | 2016-08-05 | 2016-12-14 | 上海漕河泾桃浦科技智慧城经济发展有限公司 | Freezing isolation and in-situ heat desorbing integral system and the processing method of contaminated soil |
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