CN106807734A - A kind of organic polluted soil thermal desorption system - Google Patents
A kind of organic polluted soil thermal desorption system Download PDFInfo
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- CN106807734A CN106807734A CN201710008109.3A CN201710008109A CN106807734A CN 106807734 A CN106807734 A CN 106807734A CN 201710008109 A CN201710008109 A CN 201710008109A CN 106807734 A CN106807734 A CN 106807734A
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- thermal desorption
- temperature
- transmission belt
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- feeder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a kind of organic polluted soil thermal desorption system.Problem to be solved is that existing indirect thermal desorption system heat transfer effect is poor, and soil treatment efficiency is low, and equipment attrition is serious；And directly thermal desorption system vent gas treatment amount is big, processing cost is high.It is characterized in that and directly heated to soil as heating agent using heat-carrying ball, screw(-type) feeder is divided into raw material screw(-type) feeder and low temperature screw(-type) feeder, raw material screw(-type) feeder lower section is provided with middle warm matchmaker's transmission belt, one end of middle warm matchmaker's transmission belt is provided with oar blade type stirring pusher, the other end of oar blade type stirring pusher is provided with low-temperature material separator, low-temperature material separator respectively with soil transfer band, low temperature heating agent transmission belt is connected, soil transfer band is connected with low temperature screw(-type) feeder, low temperature screw(-type) feeder lower section is provided with high temperature heating agent transmission belt, one end of high temperature heating agent transmission belt is connected with heating furnace, the other end is provided with high temperature thermal desorption device, high temperature thermal desorption device lower section is provided with high-temperature material separator；Heating furnace is built with heat-carrying ball device.The present invention also have simple structure, it is easy to operate, practical the features such as.
Description
Technical field：
The present invention relates to organic polluted soil thermal desorption technology field, specifically a kind of organic polluted soil thermal desorption system.
Background technology：
Thermal desorption technology has been widely used in repairing by volatility/semi-volatile organic matter contaminated soil.Soil is heated
To 200~600 DEG C, benzene homologues therein, agricultural chemicals, polycyclic aromatic hydrocarbon and non-chloro volatility/half volatile can be effectively removed
The pollutants such as organic matter.The capacity usage ratio of thermal desorption system how is improved, mitigates the abrasion of equipment, improve the treatment effect of soil
Rate, the processing cost for reducing unit soil is significant for the popularization of the technology.
Mainly there are two kinds currently for the thermal desorption system of organic polluted soil, one kind is direct thermal desorption system, that is, adopt
Use heat smoke（Combustion gas）Directly heat soil to assigned temperature.The advantage of this mode is soil and heat smoke（Combustion gas）Directly connect
Touch, heat exchange efficiency is higher, but the organic pollution gone out due to desorption is directly entered in flue gas, considerably increases the treatment of tail gas
Amount and intractability, so as to improve processing cost.Another kind is indirect thermal desorption system, will soil and heat smoke（Combustion gas）
Separate, by sleeve or hollow blade indirectly heat soil, its advantage is the reduction of the treating capacity and intractability of tail gas, but
Indirectly heat makes the heat exchange efficiency of system relatively low, while hollow blade is contacted in rotating with soil, serious wear, fault rate is high,
Change difficult.
In addition in current thermal desorption system, soil firing equipment is often monomer, and soil is realized in one apparatus
The whole process such as drying, heating, strong volatile organic compound desorption, weak volatile organic compound desorption, this aspect causes Soil Thermal
Desorption apparatus single devices are larger, and arrangement and manufacture are difficult, and investment increases, on the other hand actually stop of the soil in high temperature section
Time is extremely limited, to ensure desorption effect, it has to reduce the treatment effeciency of soil.In addition, deposit within one device simultaneously
In dryer section, middle temperature bringing-up section and elevated temperature desorption section, heat preservation technology is complicated, it is difficult to effective control device radiating, improves energy
Utilization ratio.
The content of the invention
The present invention provides a kind of organic polluted soil thermal desorption system.
The object of the present invention is achieved like this：Screw(-type) feeder is divided into raw material screw(-type) feeder and low temperature screw feeder
Machine, raw material screw(-type) feeder lower section is provided with middle warm matchmaker's transmission belt, and one end of middle warm matchmaker transmission belt is provided with oar blade type and stirs
Pusher is mixed, the other end of oar blade type stirring pusher is provided with low-temperature material separator, low-temperature material separator difference
It is connected with soil transfer band, low temperature heating agent transmission belt, soil transfer band is connected with low temperature screw(-type) feeder, low temperature screw(-type) feeder
Lower section is provided with high temperature heating agent transmission belt, and one end of high temperature heating agent transmission belt is connected with heating furnace, and the other end is provided with warm high
Desorption apparatus, high temperature thermal desorption device lower section is provided with high-temperature material separator；Heating furnace is built with heat-carrying ball device.
Air inlet and air outlet are additionally provided with oar blade type stirring pusher.
The low-temperature material separator and high-temperature material separator are vibratory sieve industry nouns）.
High-temperature material separator is connected with middle warm matchmaker's transmission belt.
One end of low-temperature material transmission belt is arranged on the fire door top of heating furnace.
Bucket elevator is provided between low-temperature material transmission belt and heating furnace.
Air inlet and air outlet are additionally provided with high-temperature material separator.
The air inlet system being made up of condensation purifier, electric fishing coke installation, blower fan and nitrogen gas generating device respectively with oar blade type
The air inlet of air inlet, air outlet and the high temperature thermal desorption device of pusher, air outlet is stirred to connect.
The heat-carrying ball material is steel ball, alloying pellet, Ceramic Balls etc., and form is medicine ball or hollow ball, hollow ball inside
Filling heat-carrying agent.
Using heat-carrying ball as heating agent, heating soil is different from direct thermal desorption and produces a large amount of tail gas, this patent the present invention
Tail gas yield is smaller, and intractability is small, and processing cost is low；It is different from indirect thermal desorption and has that serious wear, fault rate are high, changes
The low problem of the thermal efficiency, this patent heat-carrying ball and soil directly contact, heat exchange efficiency is high, and replacing side after heat-carrying ball wear
Just, continuous production is not influenceed.
The system is divided into high temperature section and low-temperature zone.The operating temperature of low-temperature zone is 150~200 DEG C, high temperature section operating temperature
It is 450~600 DEG C.Wherein, low-temperature zone soil can be dried or early stage pretreatment, through low-temperature zone process after soil
Into high temperature section, more than 20min, the removing wherein weaker organic pollution of volatility, so as to realize to organic are stopped wherein
The removal efficiency of pollutant more than 99%.And heat-carrying ball out initially enters high temperature section from heating furnace afterwards, mix with soil is carried out to it
Heating, thereafter by entering low-temperature zone after ball clay separator, it is achieved thereby that to the cascade utilization of heat-carrying ball energy, improve
The capacity usage ratio of system.
Heating of the system to soil is divided into high temperature section and low-temperature zone, and wherein can effectively to remove volatility weaker for high temperature section
Organic pollution, and low-temperature zone can be dried to contaminated soil, and remove the stronger organic pollution of volatility, make soil
Earth thermal desorption treatment technical process it is more targeted, improve the treatment effeciency of soil, reduce single devices manufacture and
Arrangement difficulty, reduces the complexity of heat preservation technology implementation, effectively reduces system radiating.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Specific embodiment
Embodiment 1
Referring to Fig. 1, screw(-type) feeder is divided into raw material screw(-type) feeder and low temperature screw(-type) feeder, and raw material screw(-type) feeder lower section sets
Middle warm matchmaker's transmission belt is equipped with, one end of middle warm matchmaker transmission belt is provided with oar blade type stirring pusher, oar blade type stirring propulsion
The other end of machine is provided with low-temperature material separator, and low-temperature material separator is passed with soil transfer band, low temperature heating agent respectively
Defeated band connection, soil transfer band is connected with low temperature screw(-type) feeder, and low temperature screw(-type) feeder lower section is provided with the transmission of high temperature heating agent
Band, one end of high temperature heating agent transmission belt is connected with heating furnace, and the other end is provided with high temperature thermal desorption device, high temperature thermal desorption device
Lower section is provided with high-temperature material separator；Heating furnace is built with heat-carrying ball device.
Air inlet and air outlet are additionally provided with oar blade type stirring pusher.
The low-temperature material separator and high-temperature material separator are vibratory sieves.
High-temperature material separator is connected with middle warm matchmaker's transmission belt.
One end of low-temperature material transmission belt is arranged on the fire door top of heating furnace.
Bucket elevator is provided between low-temperature material transmission belt and heating furnace.
Air inlet and air outlet are additionally provided with high-temperature material separator.
The air inlet system being made up of condensation purifier, electric fishing coke installation, blower fan and nitrogen gas generating device respectively with oar blade type
The air inlet of air inlet, air outlet and the high temperature thermal desorption device of pusher, air outlet is stirred to connect.
The heat-carrying ball material is steel ball, alloying pellet, Ceramic Balls etc., and form is medicine ball or hollow ball, in hollow ball
Portion's filling heat-carrying agent such as fused salt etc., improves the heat load of single ball.
Its operation principle is as follows：
Contaminated soil enters screw(-type) feeder 1 by hopper first, mixed with the heat-carrying ball reclaimed from high temperature section thermal desorption device 5
Close, now heat-carrying ball temperature is 400 DEG C or so.The two is exchanged heat in low-temperature zone oar blade type stirring pusher 2, and soil is done
It is dry, be heated to 150~200 DEG C, now the moisture in soil and strong volatile organic contaminant are removed.
After soil and heat-carrying ball are discharged from low-temperature zone oar blade type stirring pusher 2, by soil, ball separator 3, after separation
Soil high temperature section thermal desorption device 5 is delivered into by screw(-type) feeder 4, the low temperature ball after heat exchange is by bucket elevator 8
Deliver into heating furnace 9 to continue to heat, recycle.
In high temperature section thermal desorption device 5, soil and the high temperature heat-carrying ball flowed out from heating furnace 9 after dry, heating
Mixing, the two heat exchange after, soil is heated to 450~600 DEG C, wherein the residence time reach more than 20min, organic dirt therein
Dye thing removal efficiency reaches more than 99%.
Soil and heat-carrying ball discharges from high temperature section thermal desorption device 5, enter to bury, in ball separator 6, and the soil after separation is examined
Rear backfill up to standard is surveyed, and heat-carrying ball flows into low-temperature zone, soil is dried using its waste heat, is heated.
Liquefied natural gas is carried by after the gasification of gasifier 7, being burnt into heating furnace 9 using the flue gas after burning
Hot-bulb.
Nitrogen is produced using nitrogen gas generating device 12, low-temperature zone oar blade type stirring pusher 2 and high temperature section heat is each led into
In desorption apparatus 5, the vapor of wherein thermal desorption generation, organic pollutant are taken out of, sequentially pass through the He of condensation purifier 10
Electric fishing coke installation 11 is collected and processes, and nitrogen therein is circulated in the duct in the presence of blower fan 13.
Above-mentioned ball clay separator is vibratory sieve, the following high temperature section thermal desorption dress of structure of above-mentioned high temperature section thermal desorption device
The housing put is tube-in-tube structure, and housing is divided into shell body and inner housing, and inner housing is arranged in shell body, and the inner housing is cylinder
Shape, shell body is barrel-shaped, and one end of inner housing is connected with charging aperture, and the other end is not contacted with shell body bottom；Inner housing with it is outer
The spiral blade of rotate counterclockwise is provided between housing, inner housing is internally provided with the spiral blade for turning clockwise.
Claims (9)
1. a kind of organic polluted soil thermal desorption system, it includes：Screw(-type) feeder, oar blade type stirring pusher, feed separation
Device, high temperature thermal desorption device, it is characterized in that：Screw(-type) feeder is divided into raw material screw(-type) feeder and low temperature screw(-type) feeder, former
Material screw(-type) feeder lower section is provided with middle warm matchmaker's transmission belt, and one end of middle warm matchmaker transmission belt is provided with oar blade type stirring propulsion
Machine, the other end of oar blade type stirring pusher is provided with low-temperature material separator, low-temperature material separator respectively with soil
Transmission belt, the connection of low temperature heating agent transmission belt, soil transfer band are connected with low temperature screw(-type) feeder, and low temperature screw(-type) feeder lower section sets
High temperature heating agent transmission belt is equipped with, one end of high temperature heating agent transmission belt is connected with heating furnace, the other end is provided with high temperature thermal desorption dress
Put, high temperature thermal desorption device lower section is provided with high-temperature material separator；Heating furnace is built with heat-carrying ball.
2. a kind of organic polluted soil thermal desorption device according to claim 1, it is characterized in that：On oar blade type stirring pusher
It is additionally provided with air inlet and air outlet.
3. a kind of organic polluted soil thermal desorption device according to claim 1, it is characterized in that：The low-temperature material separates dress
It is vibratory sieve to put with high-temperature material separator.
4. a kind of organic polluted soil thermal desorption device according to claim 1, it is characterized in that：High-temperature material separator with
Middle warm matchmaker transmission belt connection.
5. a kind of organic polluted soil thermal desorption device according to claim 1, it is characterized in that：The one of low-temperature material transmission belt
End is arranged on the fire door top of heating furnace.
6. a kind of organic polluted soil thermal desorption device according to claim 5, it is characterized in that：Low-temperature material transmission belt with plus
Bucket elevator is provided between hot stove.
7. a kind of organic polluted soil thermal desorption device according to claim 1, it is characterized in that：On high-temperature material separator
It is additionally provided with air inlet and air outlet.
8. a kind of organic polluted soil thermal desorption device according to claim 1, it is characterized in that：By condensation purifier, electric fishing
The air inlet system of coke installation, blower fan and nitrogen gas generating device composition stirs air inlet, the air outlet of pusher with oar blade type respectively
Air inlet, air outlet with high temperature thermal desorption device are connected.
9. a kind of organic polluted soil thermal desorption device according to claim 1, it is characterized in that：The heat-carrying ball material is steel
Ball, alloying pellet, Ceramic Balls etc., form are medicine ball or hollow ball, hollow ball inside filling heat-carrying agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710008109.3A CN106807734B (en) | 2017-01-05 | 2017-01-05 | Thermal desorption system for organic contaminated soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710008109.3A CN106807734B (en) | 2017-01-05 | 2017-01-05 | Thermal desorption system for organic contaminated soil |
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| CN106807734A true CN106807734A (en) | 2017-06-09 |
| CN106807734B CN106807734B (en) | 2020-06-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108500046A (en) * | 2018-05-09 | 2018-09-07 | 中国联合工程有限公司 | Contaminated soil thermal desorption device and its method for reducing dioxin generation |
| CN108746178A (en) * | 2018-07-13 | 2018-11-06 | 新疆维吾尔自治区固体废物管理中心 | A kind of energy saving thermal desorption processing unit in situ and processing method of oil pollution soil |
| CN109731898A (en) * | 2019-01-18 | 2019-05-10 | 南京中船绿洲环保有限公司 | A kind of indirect thermal desorption device of organic polluted soil of the irregular rotating cylinder of band |
| CN113477692A (en) * | 2021-07-07 | 2021-10-08 | 东南大学 | Organic matter contaminated soil grading thermal desorption and organic matter recycle system |
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| CN205659981U (en) * | 2016-05-30 | 2016-10-26 | 湖南恒凯环保科技投资有限公司 | Organic contaminated soil's prosthetic devices |
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| CN102357521A (en) * | 2011-07-19 | 2012-02-22 | 沈阳环境科学研究院 | Continuous direct thermal desorption method for persistent organic polluted soil |
| CN102513346A (en) * | 2011-12-01 | 2012-06-27 | 北京金隅红树林环保技术有限责任公司 | Thermal desorption method and device for organic polluted soil on basis of cement process |
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| CN103203355A (en) * | 2013-04-12 | 2013-07-17 | 江苏大地益源环境修复有限公司 | Ectopic thermal desorption treatment method of polluted soil |
| CN203621088U (en) * | 2013-12-10 | 2014-06-04 | 北京鼎实环境工程有限公司 | Energy-saving type thermal desorption repair treatment system for organic contaminated soil |
| CN104307864A (en) * | 2014-11-11 | 2015-01-28 | 常州宝利环保科技有限公司 | Remediation method of organic contaminated soil |
| CN204620628U (en) * | 2015-02-09 | 2015-09-09 | 许金振 | A kind of thermal desorption formula soil repair system |
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| CN105817472A (en) * | 2016-04-18 | 2016-08-03 | 浙江亿可利环保科技有限公司 | Fluidized bed thermal desorption device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108500046A (en) * | 2018-05-09 | 2018-09-07 | 中国联合工程有限公司 | Contaminated soil thermal desorption device and its method for reducing dioxin generation |
| CN108746178A (en) * | 2018-07-13 | 2018-11-06 | 新疆维吾尔自治区固体废物管理中心 | A kind of energy saving thermal desorption processing unit in situ and processing method of oil pollution soil |
| CN109731898A (en) * | 2019-01-18 | 2019-05-10 | 南京中船绿洲环保有限公司 | A kind of indirect thermal desorption device of organic polluted soil of the irregular rotating cylinder of band |
| CN109731898B (en) * | 2019-01-18 | 2020-04-28 | 南京中船绿洲环保有限公司 | Indirect thermal desorption device with irregular rotary drum for organic contaminated soil |
| CN113477692A (en) * | 2021-07-07 | 2021-10-08 | 东南大学 | Organic matter contaminated soil grading thermal desorption and organic matter recycle system |
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| Publication number | Publication date |
|---|---|
| CN106807734B (en) | 2020-06-30 |
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