CN102357521B - Continuous direct thermal desorption method for persistent organic polluted soil - Google Patents

Continuous direct thermal desorption method for persistent organic polluted soil Download PDF

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Publication number
CN102357521B
CN102357521B CN2011102015826A CN201110201582A CN102357521B CN 102357521 B CN102357521 B CN 102357521B CN 2011102015826 A CN2011102015826 A CN 2011102015826A CN 201110201582 A CN201110201582 A CN 201110201582A CN 102357521 B CN102357521 B CN 102357521B
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China
Prior art keywords
thermal desorption
soil
swinging
contaminated soil
desorption
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CN2011102015826A
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Chinese (zh)
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CN102357521A (en
Inventor
陈辉
邵春岩
孙俊
崔勇
郭传正
王鑫
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沈阳环境科学研究院
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Abstract

The invention provides a continuous direct thermal desorption method for persistent organic polluted soil. The method solves the problem that the pollutant-containing tail gas generated by using thermal desorption equipment in the conventional direct thermal desorption method generates secondary pollution to the atmosphere. The method is characterized by comprising the following steps of: continuously feeding the crushed polluted soil into a rotary thermal desorber by a shaft-free spiral feeder, and performing direct contact heat exchange between the soil and hot smoke generated by combustion of a light oil combustor in the thermal desorber to volatilize the persistent organic waste; after the soil subjected to thermal desorption treatment is wetted and cooled, continuously discharging the soil by a rotary slag extractor; and fully cracking and combusting the thermal desorption gas at the high temperature of 1,200 DEG C in a secondary combustion chamber, purifying the gas in a smoke treatment system, and discharging the purified gas reaching the standard. By the method, continuous thermal desorption treatment of the persistent organic polluted soil can be realized, and the treatment efficiency is improved.

Description

The method of continuous persistency organic contaminant soil direct heat desorption
Technical field
The present invention relates to the method to persistency organic contaminant soil direct heat desorption, specifically adopt the thermal desorption system of shaftless screw(-type) feeder feeding, swinging thermal desorption device and swinging mucking machine, realize the contaminated soil thermal desorption is processed continuously.
Background technology
The high-temperature oxydation burning method is processed persistency organic contaminant soil, and pyrolysis, gasification temperature are about 700~800 ℃.The pyrolytic incineration method is processed persistency organic contaminant soil, and thermal desorption temperature is about 400~600 ℃.Obvious thermal desorption method consumes energy less, cost is low.
At present, the thermal desorption method that adopts both at home and abroad extensively has two kinds of direct heat desorption and indirect thermal desorptions.The direct heat desorption is to finish organic desorption in the refuse by the direct heat transfer between flue gas and the refuse.Present direct heat desorption method is to use thermal desorption equipment, is monotechnics, and the tail gas with pollutant that it produces produces secondary pollution to atmosphere.
Summary of the invention
For solving the problems of the technologies described above, the purpose of this invention is to provide a kind of method of continuous persistency organic contaminant soil direct heat desorption, burn under the hot environment of thermal desorption gas in dual firing chamber, incineration flue gas is qualified discharge after purified treatment.
The object of the present invention is achieved like this: it has the thermal desorption device, it is characterized in that: jaw crusher, belt conveyor, shaftless screw(-type) feeder are connected with swinging thermal desorption device and are connected, the slag notch of swinging thermal desorption device connects the swinging mucking machine, the gas outlet of swinging thermal desorption device connects the air inlet of dual firing chamber, establishes bumer of light fuel in the swinging thermal desorption device.
The technical process of this system is:
⑴ jaw crusher carries out broken preliminary treatment to persistency organic contaminant soil, and contaminated soil is reached into the stove requirement.
⑵ send into pretreated contaminated soil continuously, uniformly in the swinging thermal desorption device by belt conveyor and shaftless screw(-type) feeder successively.
⑶ swinging thermal desorption device is provided with a bumer of light fuel, and the flue gas of generation and contaminated soil together enter swinging thermal desorption device.
Pollution-free soil through thermal desorption is discharged continuously by the swinging mucking machine after squirting cooling.
The gas that the contaminated soil desorption produces enters in the dual firing chamber from the gas outlet of swinging thermal desorption device and at high temperature burns the incineration flue gas qualified discharge.
Compared with prior art, the invention has the beneficial effects as follows: realize that can carry out continuous thermal desorption to persistency organic contaminant soil processes, improved treatment effeciency, through persistent organism content in the thermal desorption soil less than 0.1mg/kg, thermal desorption gas Zhong the high temperature incineration purifying smoke bioxin content less than 0.1TEQng/Nm 3, persistence organic pollutant content is less than 0.1mg/Nm 3
Description of drawings
Further specify the present invention below in conjunction with accompanying drawing.
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is thermal desorption (containing thermal desorption) the Previous System schematic diagram among Fig. 1.
Fig. 3 is the later system schematic of the thermal desorption among Fig. 1.
The specific embodiment
Contaminated soil is sent into jaw crusher 1, and the particle after the fragmentation is less than 10mm, to have increased the specific area of contaminated soil.
Contaminated soil enters the stokehold bumer of light fuel 4 in the swinging thermal desorption device 5 is started, and swinging thermal desorption device fire box temperature is reached about 400 ℃-600 ℃, is full of light oil combustion high temperature flue gas in the burner hearth.Then with the contaminated soil after the fragmentation through belt conveyor 2 and shaftless screw(-type) feeder 3 continuous, send in the swinging thermal desorption device 5 uniformly.Shaftless Spirochete for spiral feeder and housing require heat-resisting, corrosion-resistant, and selected material is Stainless steel 316 L.The batcher motor is frequency control motor, can regulate refuse and enter the stove amount.Contaminated soil is sent in the stove.Temperature is regulated by burner in the stove.
Swinging thermal desorption device inwall need claim insulation material and refractory material, prevents that high-temperature flue gas from damaging body of heater, prevents heat loss simultaneously.Thermal desorption device charging head and the afterbody tabletting type soft seal of slagging tap can guarantee that the desorption device running is smooth and easy, can reduce inleakage again.
After contaminated soil enters stove, play the conveying refuse and strengthen the effect that stove internal contamination soil mixes with flue gas by the rotation of body of heater, the time of staying of contaminated soil in stove can be regulated by regulating the body of heater rotating speed, and the contaminated soil time of staying is generally 20-40 minutes.
Contaminated soil through after the thermal desorption processing, is discharged by swinging mucking machine 7 after squirting the dedusting cooling in rotary furnace.Swinging mucking machine housing and blade need have heat resistance, and selecting material is stainless steel 304.
The gas that the contaminated soil desorption produces enters dual firing chamber 8 from the gas outlet 6 of swinging thermal desorption device, thermal desorption gas stops 2 seconds the time that is not less than 1200 ℃ hot conditions in dual firing chamber, fully pyrolysis, burning are discharged through air-introduced machine 10, chimney 111 after 9 deacidifications of incineration flue gas process flue gas processing device, cooling, the dedusting successively.
In swinging thermal desorption device rostral-caudal temperature thermocouple and pressure sensor are set all, the temperature and pressure parameter in the stove is monitored.The control system of system support can realize can controlling to adjust above equipment as required in the thermal desorption processing procedure the control of belt conveyor, shaftless screw(-type) feeder, bumer of light fuel, swinging thermal desorption device, swinging mucking machine.
After adopting the present invention that persistency organic contaminant soil is carried out the thermal desorption processing, Persistent Organic Pollutants in Soil content is less than 0.1mg/kg, and discharging Yan gas Zhong bioxin content is less than 0.1TEQng/Nm 3, persistence organic pollutant content is less than 0.1mg/Nm 3

Claims (1)

1. the method for a continuous persistency organic contaminant soil direct heat desorption is characterized in that:
(1) contaminated soil is sent into jaw crusher, the particle after the fragmentation is less than 10mm;
(2) bumer of light fuel in the swinging thermal desorption device is started, make swinging thermal desorption device fire box temperature reach 400-600 ℃, be full of light oil combustion high temperature flue gas in the burner hearth;
(3) then with the contaminated soil after the fragmentation through belt conveyor and shaftless screw(-type) feeder continuous, send in the swinging thermal desorption device uniformly, after contaminated soil enters stove, play the conveying refuse and strengthen the effect that stove internal contamination soil mixes with flue gas by the rotation of body of heater, the time of staying of contaminated soil in stove is 20-40 minute;
(4) contaminated soil through after the thermal desorption processing, is discharged by the swinging mucking machine after squirting the dedusting cooling in rotary furnace;
(5) gas of contaminated soil desorption generation enters dual firing chamber from the gas outlet of swinging thermal desorption device, thermal desorption gas stops 1200 ℃ hot conditions and is not less than 2 seconds in dual firing chamber, fully pyrolysis, burning, qualified discharge after the deacidification of incineration flue gas process flue gas processing device, cooling, the dedusting.
CN2011102015826A 2011-07-19 2011-07-19 Continuous direct thermal desorption method for persistent organic polluted soil CN102357521B (en)

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CN102357521B true CN102357521B (en) 2013-03-20

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CN102527710B (en) * 2012-02-27 2013-07-03 山西省环境科学研究院 Heating processing equipment used for repairing organic contaminated site soil
CN102537986A (en) * 2012-02-27 2012-07-04 山西省环境科学研究院 Rotary kiln equipment used for contaminated soil restoration operation
CN102818816B (en) * 2012-09-14 2015-05-13 北京市环境保护科学研究院 Soil thermal desorption rotary furnace testing system and testing method thereof
CN102962249B (en) * 2012-10-10 2015-06-24 北京中科通用能源环保有限责任公司 Remediation system and method for contaminated soil
CN103008337B (en) * 2012-12-16 2014-11-12 华中农业大学 System and method for repairing organic material polluted soil
CN103506377B (en) * 2013-09-25 2015-07-15 浙江大学 Multi-heat source and shaftless intervallic heating type thermal desorption device for organic pollutant contaminated soil repair
CN103658165B (en) * 2013-12-10 2015-12-02 北京鼎实环境工程有限公司 A kind of energy-saving organic polluted soil thermal desorption restoration processing system
CN104858222A (en) * 2014-02-26 2015-08-26 武汉金源环保科技工程设备有限公司 Soil restoration electromagnetic pyrolysis steam rotary furnace
CN105000767B (en) * 2014-04-18 2017-08-08 环拓科技股份有限公司 Greasy filth is cracked and contaminated soil thermal desorption merging treatment system
CN104226681B (en) * 2014-09-17 2016-08-17 杭州大地环保工程有限公司 A kind of persistent organism contaminated soil indirect thermal desorption disposal plant and method
CN105170634B (en) * 2015-08-20 2017-09-15 航天凯天环保科技股份有限公司 A kind of contaminated with halogenated hydrocarbons soil restoring device
CN105855284A (en) * 2016-05-26 2016-08-17 江苏新光环保工程有限公司 Thermal desorption integrated treatment method and device
CN106040724A (en) * 2016-07-27 2016-10-26 沈阳环境科学研究院 Solid waste thermal desorption module type emergency treatment device
CN106391686A (en) * 2016-09-30 2017-02-15 陕西科技大学 Thermal desorption restorative method for chlorine pyrazole sulphur phosphorous polluted loess
CN106807734B (en) * 2017-01-05 2020-06-30 沈阳环境科学研究院 Thermal desorption system for organic contaminated soil
KR101820406B1 (en) * 2017-03-15 2018-01-19 (주)에코필 Apparatus of low temperature carbonization of organic pollutant by direct flame heating type
CN108218355A (en) * 2018-04-13 2018-06-29 合肥市晨雷思建筑材料科技有限公司 A kind of new ceramics particle environmental protection and energy saving insulating brick and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN102029287A (en) * 2010-12-15 2011-04-27 清华大学 Roller-type reverse thermal desorption system for soil polluted by organic matters

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN102029287A (en) * 2010-12-15 2011-04-27 清华大学 Roller-type reverse thermal desorption system for soil polluted by organic matters

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
peter haglund.被多氯二苯并二恶英/呋喃及其它多氯代芳香化合物污染土壤的处理方法.《Ambio-人类环境杂志》.2007,第36卷(第6期),445-451.
被多氯二苯并二恶英/呋喃及其它多氯代芳香化合物污染土壤的处理方法;peter haglund;《Ambio-人类环境杂志》;20071231;第36卷(第6期);445-451 *

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Denomination of invention: Continuous direct thermal desorption method for persistent organic polluted soil

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