CN209116353U - Organic material contaminated soil dystopy thermal desorption system - Google Patents
Organic material contaminated soil dystopy thermal desorption system Download PDFInfo
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- CN209116353U CN209116353U CN201821712157.7U CN201821712157U CN209116353U CN 209116353 U CN209116353 U CN 209116353U CN 201821712157 U CN201821712157 U CN 201821712157U CN 209116353 U CN209116353 U CN 209116353U
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- thermal desorption
- rotary kiln
- tail gas
- contaminated soil
- indirect heating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Processing Of Solid Wastes (AREA)
Abstract
The utility model relates to a kind of organic material contaminated soil dystopy thermal desorption systems, solve the problems, such as existing thermal desorption system energy consumption height, tail gas pollution environment.Technical solution includes sequentially connected screening solids feeding system, rotary kiln thermal desorption indirect heating processing system and soil cooling system, and the offgas outlet of the rotary kiln thermal desorption indirect heating processing system is sequentially connected dust pelletizing system, tail gas pre-heating system shell side, exhaust combustion system, tail gas pre-heating system tube side, combustion air pre-heating system tube side and blowdown stack.The utility model can efficiently remove the organic matter in contaminated soil and be converted into CO2Discharge, structure is simple, low energy consumption, production cost and operating cost are low, environmentally friendly.
Description
Technical field
The present invention relates to environment protection field, specifically a kind of organic material contaminated soil dystopy thermal desorption system.
Background technique
With the adjustment of the industrial structure, large quantities of insecticide factories, China, steel plant, chemical plant and oil plant Deng Gao contaminating enterprises are produced
It will gradually be shut down with industry and change the line of production or move, agriculturally insecticide largely uses and petroleum industry accident draining etc., produces big
Measure the high pollution organic material contaminated soil left.
The recovery technique of organic material contaminated soil mainly has biological prosthetic, chemical remediation, peripheral doses etc..It is biological prosthetic more
For in-situ immobilization, investment is small, operating cost is low, operating condition is mild, small to environmental disturbances, but the biological prosthetic period is long, and
Plant or microbe species are limited to, are only capable of handling certain particular kind of organic pollutants, and can be only applied to low concentration
Under the conditions of；Peripheral doses or chemical remediation are mostly showering, and initial outlay is big, operating cost is higher, but repairing efficiency is short, and
Suitable for various types of organic pollutants and high density pollution place.Comparatively, peripheral doses or chemical remediation have
Wider applicability, especially suitable for high concentration, multicomponent organic contamination place.
In numerous peripheral doses or chemical remediation technology, thermal desorption is to generally acknowledge that processing organic material contaminated soil maturation can
The technology leaned on is most widely to be applied to one of organic pollution site remediation technology.Thermal desorption technology is to different organic contaminations
Species and concentration have good adaptability, while repairing that speed is fast, and the period is short.Its principle is to be heated to contaminated soil
More than the boiling point of target contaminant, makes target contaminant be able to volatilize or separate from soil, pass through control system temperature and object
Expect the different pollutant of the removal of the residence time property of can choose, the pollutant in contaminated soil is under condition of negative pressure from soil
It separates, finally eliminates or be concentrated in vent gas treatment facility and collect.The recovery technique can efficiently remove contaminated soil
In volatility and semi-volatile organic matter (such as polycyclic aromatic hydrocarbon, pesticide, petroleum hydrocarbon, Polychlorinated biphenyls), organic removal rate highest
Up to 99% or more.
Though China has some thermal desorption equipment investments to use at present, most of to use direct-heating type rotary kiln, tail gas
Treating capacity is big.Exhaust treatment system some consumes a large amount of natural gases using simple burning process, and energy consumption is high, and processing cost occupies
It is high not under；Some uses active carbon absorption technology, and not only active carbon replacement frequency is high, and enriching pollutants are not thorough in active carbon
Bottom removal, treated, and active carbon also needs to eliminate pollution not from source as dangerous waste processing.
Summary of the invention
Purpose of the utility model is to solve above-mentioned technical problem, providing a kind of can efficiently be removed in contaminated soil
Organic matter is simultaneously converted into CO2Discharge, structure is simple, low energy consumption, production cost and operating cost are low, environment amenable organic matter
Contaminated soil heterotopic thermal desorption system.
Technical solution include sequentially connected screening solids feeding system, rotary kiln thermal desorption indirect heating processing system and
The offgas outlet of soil cooling system, the rotary kiln thermal desorption indirect heating processing system is sequentially connected dust pelletizing system, tail gas
The tube side of the shell side of pre-heating system, exhaust combustion system and tail gas pre-heating system.
The combustion air inlet connection combustion air preheating of the collet of the rotary kiln thermal desorption indirect heating processing system
The tube side of system shell side, the tail gas pre-heating system is connect through the tube side of combustion air pre-heating system with blowdown stack.
The collet exhanst gas outlet of the rotary kiln thermal desorption indirect heating processing system also connects combustion air pre-heating system
Tube side.
The exhaust combustion system is equipped with combustion air inlet, catalyst inlet and natural gas combustion nozzle.
The rotary kiln thermal desorption indirect heating processing system is indirect heating type rotary kiln.
The beneficial effects of the utility model are as follows:
1, rotary kiln thermal desorption indirect heating processing system is indirect heating, relatively directly heats rotary kiln, after thermal desorption
The tail gas amount of generation is smaller, and concentration is higher, can effectively reduce the scale and investment of subsequent exhaust treatment system.
2, tail gas pre-heating system is set before exhaust combustion system, tail gas heating medium is the flue gas after exhaust combustion, by
The temperature of flue gas is higher (~650 DEG C) after burning, thus is effectively utilized the high level heat of flue gas after burning, not compared to tail gas
Process is directly burned in preheating, effectively reduces the gas consumption in exhaust combustion system.
3, it is equipped with catalyst in exhaust combustion system and mouth is added, by the way that catalyst is added, guarantee after-flame organic dirt therein
The Burn-out temperature of organic matter is set to be greatly reduced and (be reduced to~650 DEG C) under the premise of dye object, compared to conventional without catalyst tail gas
Burning process, the method effectively reduce the gas consumption in exhaust combustion system.
It 4, is the combustion product gases and exhaust combustion after material indirect heating in rotary kiln thermal desorption indirect heating processing system
The flue gas mixing that system generates, is re-fed into pre-heated combustion air in combustion air pre-heating system, is effectively utilized flue gas in system
Lowlevel thermal energy, can be significantly reduced thermal desorption reaction in gas consumption.
5, the utility model is once invested small, realizes maximally utilizing for thermal desorption system waste heat, environmentally friendly, energy
Consumption and processing cost are low, and the more domestic similar technique of heat integration rate can be improved 30% or more.
Detailed description of the invention
Fig. 1 is the utility model flow chart
Wherein: 1- screening solids feeding system, 2- rotary kiln thermal desorption indirect heating processing system, 3- purification soil are cooling
System, 4- dust pelletizing system, 5- tail gas pre-heating system, 6- exhaust combustion system, 6.1- combustion air inlet, 6.2- catalyst into
Mouth, 6.3- natural gas combustion nozzle, 7- combustion air pre-heating system, 8- blowdown stack；21- tail gas；22- flue gas；31- natural gas；32-
Combustion air；33- catalyst.
Specific embodiment
Explanation is further explained to the utility model with reference to the accompanying drawing:
Screening solids feeding system 1 is connect with the feed inlet of rotary kiln thermal desorption indirect heating processing system 2 by belt,
The discharge port of rotary kiln thermal desorption indirect heating processing system 2 is connect with purification soil cooling system 3, and rotary kiln thermal desorption is indirect
The offgas outlet of heat treatment system 2 through dust pelletizing system 4, tail gas pre-heating system 5 shell side and exhaust combustion system 6 tail gas into
Mouth connection；The exhaust combustion system 6 is equipped with combustion air inlet 6.1, catalyst inlet 6.2 and natural gas combustion nozzle 6.3, described
The tube side and discharge cigarette of tube side of the exhanst gas outlet of exhaust combustion system 6 through tail gas pre-heating system 5 and combustion air pre-heating system 7
Chimney 8 connects.
The rotary kiln thermal desorption indirect heating processing system 2 is indirect heating type rotary kiln, has indirect heating collet,
The natural gas combustion nozzle being connected with external natural gas line is equipped in the collet, for introducing natural gas.The combustion air
7 shell side of pre-heating system is passed through combustion air and connects the combustion air of the collet of rotary kiln thermal desorption indirect heating processing system 2
Import, for combustion air to be passed through auxiliary combustion in collet；The collet of rotary kiln thermal desorption indirect heating processing system 2 out
Flue gas is also fed into pre-heated combustion air in the tube side of combustion air pre-heating system 7.
When system is run, after organic material contaminated soil removes iron, screening by screening solids feeding system 1, by Belt Conveying
To the reactor cylinder body of rotary kiln thermal desorption indirect heating processing system 2；To rotary kiln thermal desorption indirect heating processing system 2
Collet in be passed through combustion air and natural gas burns, for the machine object contaminated soil in indirect heating reactor cylinder body,
The heated volatilization of organic matter in soil, which is overflowed, forms tail gas, the purification soil after removing organic pollution substance, from rotary kiln heat
Desorption indirect heating processing system 2 is sent after entering the cooling of purification soil cooling system 3 to outside battery limit (BL).
The tail gas 21 that 2 reactor shell of rotary kiln thermal desorption indirect heating processing system generates enters dust pelletizing system 4, described
Dust pelletizing system 4 is one cyclonic deduster, and after centrifugal dust-removing, most dust in tail gas are removed；After dedusting
Tail gas enters the shell side of tail gas pre-heating system 5 by the flue gas indirect heating after the burning of subsequent exhaust combustion system 6, enters back into tail gas
Combustion system 6 is burnt, and organic pollutant is completely converted into CO2, due to the investment of catalyst, fire box temperature is down to~650 DEG C, has
The Burn-out temperature of machine object is greatly reduced；The tube side that flue gas after burning is sent into tail gas pre-heating system 5 preheats out rotary kiln heat
The tail gas of indirect heating processing system 2 is desorbed, then again and in 2 collet of rotary kiln thermal desorption indirect heating processing system
Flue gas 22 converges the tube side into combustion air pre-heating system 7, heats to the combustion air in shell side, cleaning of off-gas is through arranging
It puts chimney 8 and discharges (exhaust temperature~150 DEG C).Combustion air 32 after heated enters rotary kiln thermal desorption indirect heating and handles
It is used in the collet of system 2 as natural gas combustion-supporting air.
To sum up, the utility model uses rotary kiln indirect heating reactor, and vent gas treatment amount is small, and system is once invested low；
Tail gas pre-heating system, combustion air pre-heating system, the high-low-position waste heat being effectively utilized in tail gas are set in system；Exhaust combustion
Catalyst is added in system, reduces the Burn-out temperature of organic matter, reduces energy consumption.With a small investment, the comprehensive benefit of thermal energy
With rate height, repair process significant advantage at low cost.
Claims (5)
1. a kind of organic material contaminated soil dystopy thermal desorption system, including sequentially connected screening solids feeding system, rotary kiln
Thermal desorption indirect heating processing system and soil cooling system, which is characterized in that the rotary kiln thermal desorption indirect heating processing
The offgas outlet of system is sequentially connected dust pelletizing system, the shell side of tail gas pre-heating system, exhaust combustion system and tail gas pre-heating system
Tube side.
2. organic material contaminated soil dystopy thermal desorption system as described in claim 1, which is characterized in that the rotary kiln heat is de-
The combustion air inlet of the collet of attached indirect heating processing system connects combustion air pre-heating system shell side, tail gas preheating system
The tube side of system is connect through the tube side of combustion air pre-heating system with blowdown stack.
3. organic material contaminated soil dystopy thermal desorption system as claimed in claim 2, which is characterized in that the rotary kiln heat is de-
The exhanst gas outlet of the collet of attached indirect heating processing system also connects the tube side of combustion air pre-heating system.
4. organic material contaminated soil dystopy thermal desorption system as described in any one of claims 1-3, which is characterized in that the tail
Gas combustion system is equipped with combustion air inlet, catalyst inlet and natural gas combustion nozzle.
5. organic material contaminated soil dystopy thermal desorption system as described in any one of claims 1-3, which is characterized in that described time
Rotary kiln thermal desorption indirect heating processing system is indirect heating type rotary kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821712157.7U CN209116353U (en) | 2018-10-22 | 2018-10-22 | Organic material contaminated soil dystopy thermal desorption system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821712157.7U CN209116353U (en) | 2018-10-22 | 2018-10-22 | Organic material contaminated soil dystopy thermal desorption system |
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| Publication Number | Publication Date |
|---|---|
| CN209116353U true CN209116353U (en) | 2019-07-16 |
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ID=67201863
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821712157.7U Active CN209116353U (en) | 2018-10-22 | 2018-10-22 | Organic material contaminated soil dystopy thermal desorption system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014268A (en) * | 2019-12-26 | 2020-04-17 | 天津大学 | Thermal remediation system for organic matter contaminated soil through two-phase transformation thermal treatment |
| CN111069262A (en) * | 2019-12-27 | 2020-04-28 | 天津大学 | Phase change heat transfer soil thermal remediation system |
-
2018
- 2018-10-22 CN CN201821712157.7U patent/CN209116353U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014268A (en) * | 2019-12-26 | 2020-04-17 | 天津大学 | Thermal remediation system for organic matter contaminated soil through two-phase transformation thermal treatment |
| CN111069262A (en) * | 2019-12-27 | 2020-04-28 | 天津大学 | Phase change heat transfer soil thermal remediation system |
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