CN102580994B - Remediation equipment for non-volatile organic polluted soil - Google Patents

Remediation equipment for non-volatile organic polluted soil Download PDF

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Publication number
CN102580994B
CN102580994B CN2012100440093A CN201210044009A CN102580994B CN 102580994 B CN102580994 B CN 102580994B CN 2012100440093 A CN2012100440093 A CN 2012100440093A CN 201210044009 A CN201210044009 A CN 201210044009A CN 102580994 B CN102580994 B CN 102580994B
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China
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soil
pipeline
pretreatment
cyclone dust
rotary kiln
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CN2012100440093A
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Chinese (zh)
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CN102580994A (en
Inventor
党晋华
张国信
刘利军
史晓凯
向云
王竞
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山西省环境科学研究院
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Abstract

In order to solve the problems of high energy consumption, low treatment efficiency and low heat energy utilization rate in the prior art, the invention provides remediation equipment for non-volatile organic polluted soil. The remediation equipment comprises a rotary kiln, a cyclone dust remover, a soil pretreatment system, an oxidization reaction pool, an activated carbon adsorption tower and a chimney which are connected with one another through pipelines, wherein the upper end of the side wall of the cyclone dust remover is connected with the smoke outlet of the rotary kiln; the top of the cyclone dust remover is connected with the bottom of a treatment chamber of the soil pretreatment system through a pipeline; a gas collection cover of the soil pretreatment system is connected with a reaction pool of the oxidization reaction pool through a pipeline; a gas collection cover of the reaction pool is connected with the bottom of the activated carbon adsorption tower through a pipeline; and the top of the activated carbon adsorption tower is connected with the chimney through a pipeline. According to the remediation equipment, high-temperature smoke subjected to cyclone dust removal is used for pretreating the soil before cooling treatment, so that the moisture content in the soil is reduced, temperature of the soil is raised, and volatile organic pollution gas is separated out; and therefore, the heat carried by the smoke is recycled, and the heat energy utilization rate is increased.

Description

The prosthetic appliance of difficult volatilization organic contaminated soil

Technical field

The present invention relates to the prosthetic appliance of contaminated soil, specifically the prosthetic appliance of the difficult volatility contaminated soil of a kind of industrial pollutants place high concentration.

Background technology

The general using thermal desorption technology of carrying out of the difficult volatilization of current industrial place high concentration organic contaminated soil repair is carried out, generally by rotary kiln, to contaminated soil, heating makes organic pollution evaporate into the redox chamber, adding heat-flash in the redox chamber more at high temperature decomposes it, finally directly with cooling device, make high-temperature tail gas be reduced to uniform temperature, more directly be thrown among atmosphere after other a series of processing.The method can be good at being used among the contaminated site soil remediation work that organic pollution content is higher, but its open defect is also arranged, and energy consumption is high, and treatment effeciency and heat utilization rate are low, makes the cost of contaminated soil repair high.

Summary of the invention

The objective of the invention is to solve that the energy consumption existed in prior art is high, treatment effeciency and the low problem of heat utilization rate, the invention provides a kind of prosthetic appliance of difficult volatilization organic contaminated soil.

For achieving the above object, the technical solution used in the present invention is: a kind of prosthetic appliance of difficult volatilization organic contaminated soil, comprise the rotary kiln, cyclone dust collectors, soil pretreatment system, oxidation reaction pond, activated carbon adsorber and the chimney that connect successively by pipeline

Described soil pretreatment system comprises process chamber, and inner treatment chamber is provided with the pretreatment system discharge duct, and the pretreatment system discharge duct is provided with steam vent, and the process chamber upper end connects soil pretreatment system gas skirt;

Described redox reaction pond comprises reaction tank, and reaction tank inside is provided with the reaction tank discharge duct, and the reaction tank discharge duct is provided with exhaust capillary, coupled reaction pond, reaction tank upper end gas skirt;

The sidewall upper of cyclone dust collectors connect rotary kiln exhanst gas outlet, the lower end of cyclone dust collectors is provided with the dust outlet, the top of cyclone dust collectors is connected with soil pretreatment system chamber bottom by pipeline, soil pretreatment system gas skirt is connected with the reaction tank in oxidation reaction pond by pipeline, the reaction tank gas skirt is connected with the charcoal absorption tower bottom by pipeline, and the activated carbon adsorber top is connected with chimney by pipeline.

Equipment of the present invention is that high-temperature flue gas is out being introduced the contaminated soil pretreatment system after dedusting by thermal desorption in rotary kiln, utilize high-temperature flue gas to carry out pretreatment to the difficult volatilization of high concentration soil, make the moisture content in soil be significantly reduced, the height of the moisture content in soil is the factor of determination of energy consumption in the thermal desorption technology, and the water content reduction can effectively reduce energy consumption.Improved the temperature of pending soil simultaneously, and make the direct desorption of effumability organic pollution in soil out, the gas volatilized is introduced into the oxidation reaction pond and is discharged by chimney by activated carbon adsorber absorption through series reaction such as peroxide decomposition, and after pretreatment, the soil of rising temperature is admitted to rotary kiln and does further processing again.

Compared with prior art, the prosthetic appliance of difficult volatilization organic contaminated soil of the present invention is that the high-temperature flue gas after cyclone dust removal is drawn it before cooling processing, be used for pretreatment soil, reduce soil moisture content, improve the pending soil moisture, and isolate the effumability organic pollutant, the heat that high-temperature flue gas carries is recycled, improved heat utilization rate, this cover system utilizes the oxidation reaction principle to decompose the removal dusty gas simultaneously, avoided again utilizing the cost that the heat of high temperature decomposing organic pollutant brings sharply to increase problem, make this cover system can be when guaranteeing repairing effect, avoid causing secondary to dye to environment, can improve heat utilization ratio, reduce the contaminated soil treatment cost, greatly improved treatment effeciency.

The accompanying drawing explanation

The structural representation of the prosthetic appliance that Fig. 1 is the difficult volatilization of the present invention organic contaminated soil.

The structural representation that Fig. 2 is rotary kiln of the present invention and charging/discharging device.

The structural representation that Fig. 3 is the soil pretreatment system.

The structural representation that Fig. 4 is the oxidation reaction pond.

The 1-rotary kiln, 2-cyclone dust collectors, 3-soil pretreatment system, 4-oxidation reaction pond, 5-activated carbon adsorber, 6-chimney, 7-the first air-introduced machine, 8-the second air-introduced machine, 9-the 3rd air-introduced machine, 10-feed belt machine, 11-discharging belt conveyer, 12-feed auger device, the 31-process chamber, 32-soil pretreatment system exhaust pipeline, 33-soil pretreatment system gas skirt, the 41-reaction tank, 42-reaction tank discharge duct, 43-reaction tank gas skirt.

The specific embodiment

Below in conjunction with accompanying drawing, technical solutions according to the invention are done and illustrated.

As shown in Figure 1, the prosthetic appliance of a kind of difficult volatilization organic contaminated soil of the present invention, comprise the rotary kiln 1, cyclone dust collectors 2, soil pretreatment system 3, oxidation reaction pond 4, activated carbon adsorber 5 and the chimney 6 that connect successively by pipeline.

As shown in Figure 2, rotary kiln 1 is High-temp. kiln, and rotary kiln is connected with reductor, and reductor connects variable-frequency motor, and the rotary kiln front end is provided with feed belt machine 10, and rear end is provided with discharging belt conveyer 11, between rotary kiln 1 and feed belt machine 10, is provided with feed auger device 12.The soil that feed auger device 12 is carried belt feeder pushes rotary kiln 1, drive by regulating the variable-frequency motor frequency rotating speed that reductor is controlled stove, thereby make soil thermally equivalent in kiln, in soil, volatilization and half volatile organic contaminant are able to rapid volatilization by the controllable temperature combustor to heating in kiln.

As shown in Figure 3, described soil pretreatment system 3 comprises process chamber 31, process chamber 31 inside are provided with soil pretreatment system exhaust pipeline 32, and soil pretreatment system exhaust pipeline 32 is provided with steam vent, and process chamber 31 upper ends connect soil pretreatment system gas skirt 33.Cyclone dust collectors high-temperature flue gas out enters the soil pretreatment system the difficult volatility soil of high concentration is heated, purges.The soil that the hydraulic pressure strut is housed can be set on pretreatment system discharge duct 32 and display device, can automatically the soil of handling well be poured out to the contaminated soil treatment system, on the seal closure of process chamber 31 upper ends, leave outlet, outlet conduit is connected with the second air-introduced machine.

As shown in Figure 4, described oxidation reaction pond 4 comprises reaction tank 41, and reaction tank 41 inside are provided with reaction tank discharge duct 42, and reaction tank discharge duct 42 is provided with exhaust capillary, reaction tank 41 coupled reaction pond, upper end gas skirts 43.In oxidation reaction pond 4, reactant liquor is housed, reactant liquor is selected according to the kind of organic pollution, generally select Fenton reagent, i.e. the compound of hydrogen peroxide and iron (divalence), pollutant can be degraded effectively and rapidly by direct chemical reaction or hydroxyl radical free radical.

Cyclone dust collectors are for reducing dust content in flue gas, the sidewall upper of cyclone dust collectors 2 connect rotary kiln 1 exhanst gas outlet, the lower end of cyclone dust collectors 2 is provided with the dust outlet, and the top of cyclone dust collectors 2 is connected with soil pretreatment system process chamber 31 bottoms by pipeline.Soil pretreatment system gas skirt 33 is connected with the reaction tank 41 in oxidation reaction pond 4 by pipeline, and reaction tank gas skirt 43 is connected with activated carbon adsorber 5 bottoms by pipeline, and activated carbon adsorber 5 tops are connected with chimney 6 by pipeline.

The first air-introduced machine 7 is housed on the pipeline between cyclone dust collectors 2 and soil pretreatment system 3, the second air-introduced machine 8 is housed on the pipeline between soil pretreatment system 3 and oxidation reaction pond 4, the 3rd air-introduced machine 9 is housed on the pipeline between activated carbon adsorber 5 and chimney 6.

Described the first air-introduced machine 7 adopts the high temperature frequency converting induced draft fan, the first air-introduced machine 7 will be from rotary kiln 1 high-temperature flue gas out introduce cyclone dust collectors 2, the power of regulating the high temperature frequency converting induced draft fan is regulated from cyclone dust collectors 2 size and the temperature of exhaust gas volumn out, and the high temperature frequency converting induced draft fan also is used for the stream of gas in control system simultaneously.

In soil pretreatment system 3, through pretreated soil, be sent in rotary kiln, through the High Temperature Rotating heating, by discharging belt conveyer 11 transportations out, the high-temperature flue gas evaporated in the kiln body is inhaled into cyclone dust collectors 2 and removes dust, then send into soil pretreatment system 1 by the first air-introduced machine 7, the heat that high-temperature flue gas carries is recycled at this, dusty gas after energy is utilized is sent into 4 bottoms, oxidation reaction pond by the second air-introduced machine 8, dusty gas again enters activated carbon adsorber 5 after degrading in oxidation reaction pond 4 and carries out the physics reparation, to guarantee dusty gas, degraded fully.The gas that activated carbon adsorber 5 emits is discharged by chimney 6 by the 3rd air-introduced machine 9, and the 3rd air-introduced machine 9 also is used for controlling the trend by oxidation reaction pond 4 Exhaust Gas.

Claims (4)

1. the prosthetic appliance of a difficult volatilization organic contaminated soil, it is characterized in that: comprise the rotary kiln (1), cyclone dust collectors (2), soil pretreatment system (3), oxidation reaction pond (4), activated carbon adsorber (5) and the chimney (6) that connect successively by pipeline
Described soil pretreatment system (3) comprises process chamber (31), process chamber (31) inside is provided with soil pretreatment system exhaust pipeline (32), soil pretreatment system exhaust pipeline (32) is provided with steam vent, and process chamber (31) upper end connects soil pretreatment system gas skirt (33);
Described oxidation reaction pond (4) comprises reaction tank (41), reactant liquor is equipped with in (4) in the oxidation reaction pond, reaction tank (41) inside is provided with reaction tank discharge duct (42), reaction tank discharge duct (42) is provided with exhaust capillary, reaction tank (41) upper end coupled reaction pond gas skirt (43);
The sidewall upper of cyclone dust collectors (2) connects the exhanst gas outlet of rotary kiln (1), the top of cyclone dust collectors (2) is connected with soil pretreatment system process chamber (31) bottom by pipeline, soil pretreatment system gas skirt (33) is connected with the reaction tank (41) of oxidation reaction pond (4) by pipeline, reaction tank gas skirt (43) is connected with activated carbon adsorber (5) bottom by pipeline, and activated carbon adsorber (5) top is connected with chimney (6) by pipeline.
2. the prosthetic appliance of difficult volatilization organic contaminated soil according to claim 1, it is characterized in that: on the pipeline between cyclone dust collectors (2) and soil pretreatment system (3), the first air-introduced machine (7) is housed, on pipeline between soil pretreatment system (3) and oxidation reaction pond (4), the second air-introduced machine (8) is housed, the 3rd air-introduced machine (9) is housed on the pipeline between activated carbon adsorber (5) and chimney (6).
3. the prosthetic appliance of difficult volatilization organic contaminated soil according to claim 2, is characterized in that: described the first air-introduced machine (7) employing high temperature frequency converting induced draft fan.
4. according to the prosthetic appliance of claim 1 or 2 or 3 described difficult volatilization organic contaminated soils, it is characterized in that: rotary kiln (1) is connected with reductor, reductor connects variable-frequency motor, rotary kiln (1) front end is provided with feed belt machine (10), rear end is provided with discharging belt conveyer (11), between rotary kiln (1) and feed belt (10) machine, is provided with feed auger device (12).
CN2012100440093A 2012-02-27 2012-02-27 Remediation equipment for non-volatile organic polluted soil CN102580994B (en)

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CN102580994B true CN102580994B (en) 2013-12-11

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103357654B (en) * 2013-08-13 2015-01-21 山西省环境科学研究院 Integrated contaminated soil heat treatment system
CN103894412B (en) * 2014-03-26 2015-10-07 东南大学 A kind of soil remediation method for upgrading
CN108246774A (en) * 2018-01-31 2018-07-06 王良伍 A kind of organic pollution environmental protection pyrolysis treatment systems and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006053728A1 (en) * 2004-11-19 2006-05-26 Vomm Chemipharma S.R.L. Method of remediating soil contaminated with polyhalogenated hydrocarbons
CN101530858A (en) * 2009-03-18 2009-09-16 环境保护部南京环境科学研究所 Soil pollution thermal desorption restoration processing system
CN101780467A (en) * 2009-09-29 2010-07-21 北京建工环境修复有限责任公司 Indirect thermal desorption device
CN102029287A (en) * 2010-12-15 2011-04-27 清华大学 Roller-type reverse thermal desorption system for soil polluted by organic matters
CN202447366U (en) * 2012-02-27 2012-09-26 山西省环境科学研究院 Equipment for repairing soil polluted by hardly volatile organics

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006053728A1 (en) * 2004-11-19 2006-05-26 Vomm Chemipharma S.R.L. Method of remediating soil contaminated with polyhalogenated hydrocarbons
CN101530858A (en) * 2009-03-18 2009-09-16 环境保护部南京环境科学研究所 Soil pollution thermal desorption restoration processing system
CN101780467A (en) * 2009-09-29 2010-07-21 北京建工环境修复有限责任公司 Indirect thermal desorption device
CN102029287A (en) * 2010-12-15 2011-04-27 清华大学 Roller-type reverse thermal desorption system for soil polluted by organic matters
CN202447366U (en) * 2012-02-27 2012-09-26 山西省环境科学研究院 Equipment for repairing soil polluted by hardly volatile organics

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