CN102527704B - Soil remediation system - Google Patents

Soil remediation system Download PDF

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Publication number
CN102527704B
CN102527704B CN 201210015615 CN201210015615A CN102527704B CN 102527704 B CN102527704 B CN 102527704B CN 201210015615 CN201210015615 CN 201210015615 CN 201210015615 A CN201210015615 A CN 201210015615A CN 102527704 B CN102527704 B CN 102527704B
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CN
China
Prior art keywords
soil
rotary kiln
pyrolysis
waste gas
water condenser
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Application number
CN 201210015615
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Chinese (zh)
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CN102527704A (en
Inventor
石云峰
潘永刚
许佳敏
胡继波
汤克敏
林志坚
Original Assignee
广州机械设计研究所
广州市金龙峰环保设备工程有限公司
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Application filed by 广州机械设计研究所, 广州市金龙峰环保设备工程有限公司 filed Critical 广州机械设计研究所
Priority to CN 201210015615 priority Critical patent/CN102527704B/en
Publication of CN102527704A publication Critical patent/CN102527704A/en
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Publication of CN102527704B publication Critical patent/CN102527704B/en

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Abstract

The invention discloses a soil remediation system. The soil remediation system comprises a primary spiral conveyer, a vibrating screen, a secondary spiral conveyer, a thermal desorption rotary kiln, a three-level spiral conveyer, a crusher, a first water condenser, a cyclone dust collector, a combustion furnace, a condenser group consisting of a gas condenser and a second water condenser, a bag type dust collector, a draught fan and a cooling tower. The soil remediation system has simple integration, is simple in operation when being used for soil remediation, simultaneously enables the harmful substances in the soil processed at last to be extremely low, can be used in a recycling manner.

Description

A kind of soil repair system

Technical field

The present invention relates to a kind of soil repair system.

Background technology

Development along with industrialization and urbanization; the problem of atmosphere pollution, water pollution and soil pollution is increasingly serious; these contaminated zones are to the very large harm of people; as; contain excessive heavy metal in the soil; cause the grain of planting in contaminated soil or vegetables etc. also to be polluted; finally; ingested by the people and enter in the body; cause a lot of diseases such as Itai-itai diseases, cancer etc., protection of the environment, therefore; namely protect the healthy of people, thereby promoting the sustainable development of economic society and people's healthy living.

How to solve the soil pollution problem, national governments and institute of responsible enterprise among the people problems of concern always, in the prior art, the means of processing the soil pollution problem have: steam lixiviate, fixing/stabilising, vitrifying reparation, pyrolysis such as analyse at the method, the system that uses these methods is all too complicated, when the application corresponding system is processed, the pollution problem that also often can not well solve essence.

Summary of the invention

The purpose of this invention is to provide a kind of soil repair system.

The technical solution used in the present invention is:

A kind of soil repair system comprises that one-level conveying worm, vibratory sieve, deuterostrophies conveyer, pyrolysis analyse stove rotary kiln, three grades of conveying worms, disintegrating machine, the first water condenser, cyclone dust collectors, incinerator, gas condenser, the second water condenser, sack cleaner, air-introduced machine, cooling tower; Wherein:

The one-level conveying worm is delivered to vibratory sieve with pending soil;

The deuterostrophies conveyer is delivered to pyrolysis with the soil that sieves and analyses the stove rotary kiln;

Pyrolysis is analysed the stove rotary kiln soil heating is resolved;

Three grades of conveying worms will heat the soil of resolving and be delivered to crusher in crushing;

The first water condenser will be analysed 500-600 ℃ the waste gas of discharging the stove rotary kiln from pyrolysis and will be cooled to 280-320 ℃;

Cyclone dust collectors separate through mercury simple substance and dust in the waste gas of the first water condenser cooling;

Incinerator burns the waste gas of discharging from cyclone dust collectors;

400-500 ℃ the waste gas that gas condenser and the second water condenser will be discharged from incinerator is cooled to 160-200 ℃;

Sack cleaner is removed through the dust in the waste gas of condensation;

Air-introduced machine will be drawn through the waste gas of dedusting and be effluxed;

Cooling tower provides condensed water to the first water condenser and the second water condenser.

Pending soil moisture<20%.

Particle diameter<the 10mm of sieved soil.

Pyrolysis is analysed and is kept in the stove rotary kiln soil moisture 450-800 ℃ scope.

Pyrolysis analyse in the stove rotary kiln pressure for-40Pa to-60Pa.

The invention has the beneficial effects as follows: system of the present invention consists of simple, and use system of the present invention and carry out Soil Thermal when repairing, processing ease, the harmful substance contents in the last soil of processing is very low simultaneously, can recycle.

Description of drawings

Fig. 1 is that system of the present invention consists of schematic diagram.

The specific embodiment

As shown in Figure 1, a kind of soil repair system comprises that one-level conveying worm 1, vibratory sieve 2, deuterostrophies conveyer 3, pyrolysis analyse stove rotary kiln 4, three grades of conveying worms 12, disintegrating machine 13, the first water condenser 5, cyclone dust collectors 6, incinerator 7, gas condenser 8, the second water condenser 9, sack cleaner 10, air-introduced machine 11, cooling tower 14; Wherein:

One-level conveying worm 1 is delivered to vibratory sieve 2 with pending soil;

Deuterostrophies conveyer 3 is delivered to pyrolysis with the soil that sieves and analyses stove rotary kiln 4;

Pyrolysis is analysed stove rotary kiln 4 the soil heating is resolved;

Three grades of conveying worms 12 will heat the soil of resolving and be delivered to disintegrating machine 13 fragmentations;

The first water condenser 5 will be analysed 500-600 ℃ the waste gas of discharging the stove rotary kiln 4 from pyrolysis and will be cooled to 280-320 ℃;

Cyclone dust collectors 6 separate through mercury simple substance and dust in the waste gas of the first water condenser 5 coolings;

Incinerator 7 burns the waste gas of discharging from cyclone dust collectors 6;

400-500 ℃ the waste gas that gas condenser 8 and the second water condenser 9 will be discharged from incinerator is cooled to 160-200 ℃;

Sack cleaner 10 is removed through the dust in the waste gas of condensation;

Air-introduced machine 11 will be drawn through the waste gas of dedusting and be effluxed;

Cooling tower 14 is carried condensed water to the first water condenser 5 and the second water condenser 9.

The feed flow of condensed water is 8-12m3/h.The temperature of condensed water is 28-32 ℃.

When utilizing this cover soil repair system to carry out soil remediation, soil remediation method comprises the steps:

1) one-level conveying worm 1 is transported to vibratory sieve 2 with soil to be repaired (humidity<20%) and sieves, (particle diameter<10mm) is transported to pyrolysis and analyses stove rotary kiln 4(Yixing City China auspicious incinerator development in science and technology Co., Ltd and produce deuterostrophies conveyer 3 with sieved soil with the transporting velocity of 100kg/h, model: heating is resolved HR-X), the scope that stove rotary kiln 4 interior temperature of charge remain on 450 ℃-800 ℃ is analysed in pyrolysis, pyrolysis analyse in the stove rotary kiln 4 pressure for-60Pa to-40Pa.

2) soil that will resolve through heating of three grades of conveying worms 12 is delivered to disintegrating machine 13 fragmentations with the transporting velocity of 100kg/h, and it is recycling namely to can be used as commercial land soil through broken soil;

3) analyse stove rotary kiln 4 waste gas out with 420m from pyrolysis 3The flow of/h is cooled to 280-320 ℃ through the first water condenser 5;

4) through the waste gas of the first water condenser 5 again with 420m 3The flow of/h enters cyclone dust collectors 6, isolates granule dust and liquid mercury;

5) from cyclone dust collectors 6 waste gas out with 420m 3The flow of/h enters incinerator 7 burning (temperature is 1000-1200 ℃ in the incinerator), from incinerator 7 waste gas (400-500 ℃) out with 850m 3The flow of/h enters gas condenser 8 and the second water condenser 9 again, makes the temperature of waste gas be down to 180 ℃, and waste gas is again with 500m 3The flow of/h is through sack cleaner 10 dedustings, and the gas after the dedusting effluxes by air-introduced machine 11.

Use soil repair system to carry out the reparation of above-mentioned steps, after testing, the content (testing standard be ISO 18287-2006) of polycyclic aromatic hydrocarbon in soil is down to 35.6mg/kg by original 433mg/kg, Hg content (testing standard is GB/T 221051-2008) is down to 0.87mg/kg by original 121mg/kg, and the content of total petroleum hydrocarbon (testing standard is HJ 350-2007) is down to 87.2mg/kg by original 1321mg/kg.

Claims (4)

1. soil repair system is characterized in that: comprise that one-level conveying worm, vibratory sieve, deuterostrophies conveyer, pyrolysis analyse stove rotary kiln, three grades of conveying worms, disintegrating machine, the first water condenser, cyclone dust collectors, incinerator, gas condenser, the second water condenser, sack cleaner, air-introduced machine, cooling tower; Wherein:
The one-level conveying worm is delivered to vibratory sieve with pending soil;
The deuterostrophies conveyer is delivered to pyrolysis with the soil that sieves and analyses the stove rotary kiln;
Pyrolysis is analysed the stove rotary kiln soil heating is resolved;
Three grades of conveying worms will heat the soil of resolving and be delivered to crusher in crushing;
The first water condenser will be analysed 500-600 ℃ the waste gas of discharging the stove rotary kiln from pyrolysis and will be cooled to 280-320 ℃;
Cyclone dust collectors separate through mercury simple substance and dust in the waste gas of the first water condenser cooling;
Incinerator burns the waste gas of discharging from cyclone dust collectors;
400-500 ℃ the waste gas that gas condenser and the second water condenser will be discharged from incinerator is cooled to 160-200 ℃;
Sack cleaner is removed through the dust in the waste gas of condensation;
Air-introduced machine will be drawn through the waste gas of dedusting and be effluxed;
Cooling tower provides condensed water to the first water condenser and the second water condenser;
Wherein, the particle diameter<10mm of sieved soil.
2. a kind of soil repair system according to claim 1 is characterized in that: pending soil moisture<20%.
3. a kind of soil repair system according to claim 1 is characterized in that: pyrolysis is analysed and is kept the soil moisture 450-800 ℃ scope in the stove rotary kiln.
4. a kind of soil repair system according to claim 1 is characterized in that: pyrolysis analyse in the stove rotary kiln pressure for-40Pa to-60Pa.
CN 201210015615 2012-01-18 2012-01-18 Soil remediation system CN102527704B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201210015615 CN102527704B (en) 2012-01-18 2012-01-18 Soil remediation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201210015615 CN102527704B (en) 2012-01-18 2012-01-18 Soil remediation system

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CN102527704A CN102527704A (en) 2012-07-04
CN102527704B true CN102527704B (en) 2013-04-17

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103056157A (en) * 2013-01-25 2013-04-24 贵州省环境科学研究设计院 Repairing method and device for mercury-polluted soil by using low-temperature pyrolysis treatment
CN104785512B (en) * 2015-03-26 2017-02-22 重庆化医太湖锅炉股份有限公司 Contaminated soil remediation system
CN108687128A (en) * 2018-06-14 2018-10-23 方碧水 A kind of soil restoring device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1043082A3 (en) * 1999-03-30 2002-10-23 Interpole Limited Method for soil decontamination
CN201135791Y (en) * 2007-12-14 2008-10-22 范生安 Deposed clay extraction method oil extracting device
CN101712042B (en) * 2009-09-29 2011-06-08 北京建工环境修复有限责任公司 Direct pyrolysis device
CN101780467B (en) * 2009-09-29 2011-06-08 北京建工环境修复有限责任公司 Indirect thermal desorption device
CN102114491A (en) * 2010-01-05 2011-07-06 传闵工程股份有限公司 Material heat-treatment device

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Address after: 510000 Zhongshan, Guangzhou, Guangzhou, Guangdong

Co-patentee after: Guangzhou Jinlong peak environmental protection equipment engineering Limited by Share Ltd

Patentee after: Guangzhou Machinery Research and Design Institute

Address before: 510000 Zhongshan, Guangzhou, Guangzhou, Guangdong

Co-patentee before: Guangzhou Jinlongfeng Environment Protection Equipment Engineering Co., Ltd.

Patentee before: Guangzhou Machinery Research and Design Institute

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