CN207279647U - A kind of organic polluted soil thermal desorption tail gas clean-up processing system - Google Patents
A kind of organic polluted soil thermal desorption tail gas clean-up processing system Download PDFInfo
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- CN207279647U CN207279647U CN201720864506.6U CN201720864506U CN207279647U CN 207279647 U CN207279647 U CN 207279647U CN 201720864506 U CN201720864506 U CN 201720864506U CN 207279647 U CN207279647 U CN 207279647U
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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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
It the utility model is related to a kind of organic polluted soil thermal desorption tail gas clean-up processing system, including along the sequentially connected waste gas combustion furnace of flue gas circulating direction, flue gas heat exchange unit, cooling tower and gas cleaning unit, it is used for cooling tower in flue gas to be quickly cooled to less than 200 DEG C, dust removing units are equipped with before waste gas combustion furnace or between waste gas combustion furnace and the flue gas heat exchange unit.Thermal desorption tail gas is in waste gas combustion furnace high temperature incineration, organic pollution in flue gas fully decomposes removal, pass through flue gas heat exchange unit Mist heat recovering, to save system energy consumption, flue gas is quickly cooled to less than 200 DEG C in cooling tower, to avoid the synthesis temperature section again of bioxin, prevents the generation of bioxin, again by gas cleaning cell processing to gas cleaning, to effectively improve the cleanliness factor of processing flue gas.
Description
Technical field
The utility model belongs to technical field of soil remediation, and in particular to a kind of organic polluted soil thermal desorption tail gas clean-up
Processing system.
Background technology
Thermal desorption technology is that contaminated soil is heated to more than the boiling point of target contaminant, makes target contaminant from soil
It is able to volatilize or separated process, target contaminant occurs evaporation, distillation, boiling, oxidation and pyrolysis etc. and makees during thermal desorption
With, by control system temperature and residence time of material can selectivity the different pollutant of removal, the dirt in contaminated soil
Dye thing is separated under condition of negative pressure from soil, finally thoroughly eliminates or concentrate collection in vent gas treatment facility.This is repaiied
Recovering technology can efficiently remove volatilization and half volatile organic contaminant (such as polycyclic aromatic hydrocarbon, pesticide, oil in contaminated soil
Hydrocarbon, Polychlorinated biphenyls), pollutants removal rate reaches as high as more than 99.98%.
Thermal desorption recovery technique is one of important soil restoring technology, it has in organic material contaminated soil reparation abroad
Have highly developed and be widely applied.It is in recent years, domestic also to occur some on thermal desorption disposing technique and the report of method,
But there are certain deficiency.For example, the utility model of Patent No. CN102029287B discloses a kind of organic pollution soil
Earth drum-type reverse thermal desorption system, the utility model of Patent No. CN104226681B disclose a kind of persistent organism dirt
The indirect thermal desorption disposal plant of soil and method are contaminated, these technologies are filled using activated carbon as thermal desorption organic exhaust gas adsorption
Put, enriching pollutants do not remove thoroughly in activated carbon, and the waste active carbon of generation is also needed as dangerous waste disposal, due to heat
It is big to be desorbed exhaust gas volumn, needs frequently to replace activated carbon in operation, activated carbon is replaced and cost of disposal is higher.
In view of a variety of deficiencies of organic polluted soil thermal desorption repair process method and apparatus and limitation, exploitation are a kind of at present
Economic and practical, energy-efficient contaminated soil thermal desorption repair system and method have important social effect and Significance for Environment.
Utility model content
The utility model embodiment is related to a kind of organic polluted soil thermal desorption tail gas clean-up processing system, can at least solve
The segmental defect of the prior art.
The utility model embodiment is related to a kind of organic polluted soil thermal desorption tail gas clean-up processing system, including exhaust gas is burnt
Stove, flue gas heat exchange unit, gas cleaning unit and the cooling tower for flue gas to be quickly cooled to less than 200 DEG C are burnt, it is described
Waste gas combustion furnace, the flue gas heat exchange unit, the cooling tower and the gas cleaning unit connect successively along flue gas circulating direction
Connect, and dedusting list is equipped with before the waste gas combustion furnace or between the waste gas combustion furnace and the flue gas heat exchange unit
Member.
As one of embodiment, the waste gas combustion furnace includes the burning furnace body section of inner cavity mutual conduction and vertical exhaust fume stove
Body section, the burning furnace body section are equipped with combustion mechanism, and the vertical smoke evacuation furnace body section bottom is equipped with ash bucket, the burning furnace body
Duan Yiduan is equipped with thermal desorption gas inlet, and the other end is connected with the side wall of the vertical smoke evacuation furnace body section and positioned at the vertical row
Below the exhanst gas outlet of cigarette furnace body section, the exhanst gas outlet of the vertical smoke evacuation furnace body section is connected with the flue gas heat exchange unit.
As one of embodiment, the waste gas combustion furnace further includes horizontal smoke evacuation furnace body section, the horizontal smoke evacuation furnace body section
One end is connected with the exhanst gas outlet of the vertical smoke evacuation furnace body section, and the other end is connected with the flue gas heat exchange unit.
As one of embodiment, the flue gas heat exchange unit includes first order heat exchanger, and the first order heat exchanger passes through
Flue is connected with the waste gas combustion furnace and the cooling tower respectively, and the first order heat exchanger is connected with the first cold air
Inlet tube and the first hot gas outlet duct, the combustion air of first hot gas outlet duct and the waste gas combustion furnace supply Guan Lian
It is logical.
As one of embodiment, the flue gas heat exchange unit further includes second level heat exchanger, the waste gas combustion furnace, described
First order heat exchanger, the second level heat exchanger and the cooling tower are sequentially connected along flue gas circulating direction by flue,
The second level heat exchanger is connected with the second cold air inlet duct and for being connected with the combustion air of thermal desorption device for pipe
Two hot gas outlet ducts.
As one of embodiment, the organic polluted soil thermal desorption tail gas clean-up processing system further include bag filter and
Cool air hose is mixed, the cooling tower, the gas cleaning unit and the bag filter are sequentially connected along flue gas circulating direction, institute
State on the flue mixed and be connected to by cool air hose between the gas cleaning unit and the bag filter or side be connected to it is described
On flue between gas cleaning unit and the cooling tower, control valve is equipped with the cool air hose of mixing.
As one of embodiment, the gas cleaning unit includes calcium hydroxide spray tower, and the calcium hydroxide spray tower passes through
Flue is connected with the cooling tower, and calcium hydroxide spraying and blowing organ is disposed with the tower body of the calcium hydroxide spray tower.
The utility model embodiment at least has the advantages that：Contaminated soil is sent into thermal desorption device and carries out hot take off
Attached processing, the thermal desorption tail gas of generation enter waste gas combustion furnace and in waste gas combustion furnace by high temperature incineration so that in flue gas
Organic pollution can fully decompose removal, and flue gas recycles its waste heat by flue gas heat exchange unit, to save system energy consumption, cold
But flue gas is quickly cooled to less than 200 DEG C in tower, so as to avoid the section of synthesis temperature again (300~500 DEG C) of bioxin, prevents
The generation of Zhi bioxin, then by gas cleaning cell processing with to gas cleaning, as removed Er Evil that may be present in flue gas
The pollutants such as English, acidic materials, effectively improve the cleanliness factor of processing flue gas.The organic polluted soil thermal desorption that the present embodiment improves
Tail gas clean-up processing system is big to contaminated soil soil property and moisture content wide adaptation range, disposal ability, repairing effect is good, secondary dirt
Contaminate that low, the degree of automation is high, available for various volatilizations and the dystopy thermal desorption repairs of semi-volatile organic matter contaminated soil
The purified treatment of the tail gas of middle generation, has good environmental benefit and social benefit.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is the structure diagram for the organic polluted soil ex-situ repair system that the utility model embodiment provides；
Fig. 2-Fig. 5 is several structure diagrams of the incinerator in Fig. 1.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
The all other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment one
Such as Fig. 1, the utility model embodiment is related to a kind of organic polluted soil thermal desorption tail gas clean-up processing system, including
Waste gas combustion furnace 2, flue gas heat exchange unit 3, gas cleaning unit and the cooling for flue gas to be quickly cooled to less than 200 DEG C
Tower 4, the waste gas combustion furnace 2, the flue gas heat exchange unit 3, the cooling tower 4 and the gas cleaning unit circulate along flue gas
Direction is sequentially connected, and before the waste gas combustion furnace 2 or in the waste gas combustion furnace 2 and the flue gas heat exchange unit 3 it
Between be equipped with dust removing units 1.Contaminated soil is sent into thermal desorption device and carries out thermal desorption processing, the thermal desorption tail gas of generation, which enters, to give up
Gas incinerator 2 is simultaneously interior by high temperature incineration in waste gas combustion furnace 2 so that and the organic pollution in flue gas can fully decompose removal,
Flue gas recycles its waste heat by flue gas heat exchange unit 3, and to save system energy consumption, flue gas is quickly cooled to 200 in cooling tower 4
Below DEG C, so as to avoid the synthesis temperature section again of bioxin, the generation of bioxin is prevented, then pass through gas cleaning cell processing
To gas cleaning, such as to remove bioxin that may be present in flue gas, acidic materials pollutant, processing flue gas is effectively improved
Cleanliness factor.The organic polluted soil thermal desorption tail gas clean-up processing system that the present embodiment improves is to contaminated soil soil property and moisture content
Wide adaptation range, disposal ability are big, repairing effect is good, secondary pollution is low, the degree of automation is high, wave available for various volatilizations and partly
The purified treatment of the tail gas produced in the dystopy thermal desorption repair of hair property organic material contaminated soil, has good environmental protection effect
Benefit and social benefit.
Further optimize above-mentioned organic polluted soil ex-situ repair system, such as Fig. 2-Fig. 5, the waste gas combustion furnace 2 includes
Furnace body section 201 and vertical smoke evacuation furnace body section 202 are burned, which is equipped with combustion mechanism, for by flue gas
To 850 DEG C~1100 DEG C, organic pollution therein is thoroughly decomposed removal, the furnace body section 202 of discharging fume vertically be vertically arranged and
Bottom is equipped with ash bucket, burns 201 one end of furnace body section and is equipped with thermal desorption gas inlet, for importing thermal desorption tail gas, the other end and
The side wall of vertical smoke evacuation furnace body section 202 is connected and turned on the inner cavity of vertical smoke evacuation furnace body section 202, vertical furnace body section 202 of discharging fume
Exhanst gas outlet connected with flue gas heat exchange unit 3, the exhanst gas outlet is positioned at the top of vertical smoke evacuation furnace body section 202 and positioned at burning
The top of the other contact (tie point for burning furnace body section 201 and vertical smoke evacuation furnace body section 202) of furnace body section 201.Above-mentioned burning
Furnace body section 201 intersects connection with vertical smoke evacuation furnace body section 202, and the angle of cut therebetween can be that right angle can also on-right angle；It is right
Then the situation at right angle, namely it is horizontally disposed to burn furnace body section 201；In the case of on-right angle, above-mentioned burning furnace body section
201 are obliquely installed, and are preferably that its arrival end is located above its port of export, i.e., from its one away from vertical smoke evacuation furnace body section 202
Hold and tilt down setting to one end of its close vertical smoke evacuation furnace body section 202；Using the above structure, produced in the incineration section furnace body
Flue gas when entering in vertical smoke evacuation furnace body section 202, the flow direction of flue gas stream can produce by horizontal direction or obliquely then be perpendicular
Straight upward steering, is conducive to the sedimentation of dust carried in flue gas, reduces the operating pressure and energy consumption of dust removing units 1.This reality
Apply in example, preferably using latter arrangements, namely burning furnace body section 201 is obliquely installed and its arrival end is located on its port of export
Side, more preferably, and the dust burned in furnace body section 201 is also easier to slide to vertical smoke evacuation furnace body section 202 the effect above.On
It is preferably to be detachably connected to state and burn furnace body section 201 with vertical smoke evacuation furnace body section 202, easy to burn the maintenance of furnace body section 201 and
Installation.It is further preferred that such as Fig. 4 and Fig. 5, which further includes horizontal smoke evacuation furnace body section 203, the horizontal row
203 one end of cigarette furnace body section is connected with the exhanst gas outlet of the vertical smoke evacuation furnace body section 202, the other end and the flue gas heat exchange unit
3 connections；By setting level smoke evacuation furnace body section 203 so that need secondary steering when being arranged outside flue gas, while flue gas can be increased and existed
Residence time in vertical smoke evacuation furnace body section 202, effectively improves the effect of settling of the dust carried in flue gas；Similarly, the water
Flat raft cigarette furnace body section 203 is preferably also detachably connected with vertical smoke evacuation furnace body section 202.In addition, furnace body section 202 of discharging fume vertically
Top is provided with dump valve, can be automatically opened up when occurring powering off suddenly or air-introduced machine failure is when emergency, avoid sending out
Generating apparatus accident；Burn and be both provided with lightweight inside furnace body section 201, vertical smoke evacuation furnace body section 202 and horizontal smoke evacuation furnace body section 203
High temperature resistant castable, can not only ensure its tolerable temperature, but also can reduce weight of equipment.
Continue the structure of above-mentioned organic polluted soil ex-situ repair system, and above-mentioned dust removing units 1 can be disposed at burned waste gas
Before stove 2 (i.e. thermal desorption tail gas is first directed into waste gas combustion furnace 2 again after dedusting) or in waste gas combustion furnace 2 and flue gas heat exchange
Between unit 3；Above-mentioned dust removing units 1 can use common cleaner, can use one or more levels cleaner, this is ability
Field technique personnel are easy to definite according to actual conditions.In the present embodiment, which uses cyclone dust collectors 1, by this
Cyclone dust collectors 1 can remove thermal desorption tail gas or the flue gas discharged by waste gas combustion furnace 2 in most of dust.
Further optimize above-mentioned organic polluted soil ex-situ repair system, above-mentioned flue gas heat exchange unit 3, which is used to recycle, to be burned
The heat of flue gas, it can be used for preheated air to be used using the combustion air as thermal desorption device and/waste gas combustion furnace 2, so as to save
About system energy consumption.Specifically, as Fig. 1, the flue gas heat exchange unit 3 include first order heat exchanger 301, the first order heat exchanger 301
Can use common air-flue gas heat-exchange unit, the first order heat exchanger 301 by flue respectively with the waste gas combustion furnace
2 and the cooling tower 4 connect, the first order heat exchanger 301 is connected with the first cold air inlet duct and the first hot air outlet
Pipe, first hot gas outlet duct are connected with the combustion air of the waste gas combustion furnace 2 for pipe.Pass through the first order heat exchanger
301, the waste heat for recovered flue gas is used for combustion air of the preheated air as waste gas combustion furnace 2；Preferably, the first order is passed through
Combustion air needed for waste gas combustion furnace 2 is preheated to 300 DEG C~400 DEG C by heat exchanger 301, and flue-gas temperature can be reduced to 650~
700℃.Further, as Fig. 1, the flue gas heat exchange unit 3 further include second level heat exchanger 302, the second level heat exchanger 302 is same
Sample can use common air-flue gas heat-exchange unit, and the flue gas discharged from first order heat exchanger 301 enters the second level heat exchanger
302 further recycle its waste heat, i.e., described waste gas combustion furnace 2, the first order heat exchanger 301, the second level heat exchanger 302
And the cooling tower 4 is sequentially connected along flue gas circulating direction by flue, the second level heat exchanger 302 is connected with second
Cold air inlet duct and the second hot gas outlet duct for being connected with the combustion air of thermal desorption device for pipe.Pass through the second level
Heat exchanger 302, the waste heat for recovered flue gas are used for combustion air of the preheated air as thermal desorption device；Preferably, by this
Combustion air needed for waste gas combustion furnace 2 is preheated to 300 DEG C~350 DEG C by first order heat exchanger 301, and flue-gas temperature can be reduced to
550~600 DEG C.
Continue the structure of above-mentioned organic polluted soil ex-situ repair system, and above-mentioned cooling tower 4 is used for from flue gas heat exchange list
The flue gas of member 3 out quickly cools down, and the type of cooling is water-spraying control, i.e., is disposed with cool water shower in the tower body of the cooling tower 4
Mechanism, is preferred in a manner of spray washing, and spray washing nozzle is mixed to form water mist progress using water and compressed air two-phase medium
Sprinkling, can strengthen the atomizing effect of cooling water, flue-gas temperature can be made to be reduced to 200 DEG C from 600 DEG C rapidly in 1S, so as to avoid
The synthesis temperature section again of bioxin, can also avoid the wet bottom in 4 bottom of cooling tower from producing sewage or mud.Above-mentioned cool water shower machine
The concrete structure of structure is that those skilled in the art are easy to definite according to the prior art, such as：The cool water shower mechanism includes
The multiple straight pipe type jet pipes being circumferentially located on along tower body on tower body inner wall, each jet pipe radially prolong along tower body to tower body axis line side
Stretch, be interval with multiple aerial fog nozzles on each jet pipe along its length；Alternatively, the cool water shower mechanism can also include with
Multiple toroidal nozzles that tower body is coaxially disposed, the diameter of each toroidal nozzle are sequentially reduced, and each toroidal nozzle can be fixed by the bracket
On tower body inner wall, multiple aerial fog nozzles are equipped with each toroidal nozzle.
Continue the structure of above-mentioned organic polluted soil ex-situ repair system, and above-mentioned gas cleaning unit is used for net to flue gas
Change, such as remove bioxin that may be present, acidic materials pollutant in flue gas, to improve the cleanliness factor for handling flue gas.For
The situation of bioxin that may be present in removal flue gas is needed, activated carbon spray tower can be set, in the activated carbon spray tower tower body
The spraying and blowing organ for being blown active carbon powder is disposed with, which can use for reference the knot of above-mentioned cool water shower mechanism
Structure, is no longer described in detail herein；Can thoroughly be removed present in flue gas by way of spraying active carbon powder has including bioxin etc.
Evil component, improves the cleanliness factor of flue gas；Active carbon powder fluidization in tower body, effectively improve with adverse current to smoke contacts it is several
Rate, improves gas cleaning effect and efficiency；Active carbon powder is easily handled, and carries out weight easy to liquid flash calciner to spraying and blowing organ
It is multiple to utilize.In the case of needing to remove acidic materials that may be present in flue gas, calcium hydroxide spray tower 5 can be set, the niter
Grey spray tower 5 is connected by flue with the cooling tower 4, and calcium hydroxide is disposed with the tower body of the calcium hydroxide spray tower 5
Spraying and blowing organ, can spray into appropriate calcium hydroxide powder, to remove the acidic materials in flue gas.Certainly, also can be in above-mentioned cooling
Lye spraying mechanism is set in tower 4, when there are can spray lye to cigarette by the lye spraying mechanism during sour gas in flue gas
Gas carries out depickling processing；Above-mentioned lye spraying mechanism can use for reference the structure of above-mentioned cool water shower mechanism, no longer be described in detail herein.
Further, further it can be recycled from the flue gas of gas cleaning unit discharge after 6 dedusting of cleaner or arrange outside,
The cleaner 6 is preferably to use bag filter 6, ensures the cleanliness factor of recycling or the flue gas arranged outside, complies with discharge mark
It is accurate.The flue gas discharged through bag filter 6 can be arranged through air-introduced machine 7, exhaust tube 8 etc. are outer.As the present embodiment preferred solution it
One, such as Fig. 1, which, which further includes, mixes cool air hose, mixes and institute is connected to by cool air hose
State on the flue between gas cleaning unit and the bag filter 6 or side be connected to the gas cleaning unit with it is described
On flue between cooling tower 4, control valve 9 is equipped with the cool air hose of mixing；Wherein, above-mentioned cool air hose of mixing is preferably other
It is connected on the flue between gas cleaning unit and cooling tower 4；Above-mentioned control valve 9 can be excessive in 4 outlet temperature of cooling tower
When automatic start, cold air is mixed in the pipeline connect to side, so that flue-gas temperature to be reduced to the tolerable temperature of bag filter 6
Within, to realize the purpose of protection bag filter 6.
It is further preferred that organic polluted soil ex-situ repair system provided in this embodiment further includes central controller,
The central controller can use the common automation control appliance system such as computer and PLC cooperations, can be in above-mentioned each equipment institute
Temperature thermocouple and flowmeter etc. are set on the flue of connection, pressure transmitter can be also set on each flue, adjusted
Valve, stop valve etc. are saved, in corresponding air supply pipe, the liquid supply pipe of the equipment such as waste gas combustion furnace 2, cooling tower 4, calcium hydroxide spray tower 5
Deng setting regulating valve, stop valve, flowmeter etc. on pipeline, above-mentioned each electrical equipment is electrically connected with central controller, with realization
The automated control of this repair system, the automated control mode being directed to can use existing common automated control side
Method, without in addition programming.
Embodiment two
The utility model embodiment is related to a kind of organic polluted soil thermal desorption tail gas clean-up processing method, including following step
Suddenly：
Step 1, thermal desorption tail gas, which is directed into waste gas combustion furnace 2, is heated to 850~1100 DEG C, and thermal desorption tail gas
850 DEG C of temperatures above section residence times are no less than 2S in the waste gas combustion furnace 2, to remove pollutant in flue gas and prevent
Produce bioxin；
Step 2, the flue gas that the waste gas combustion furnace 2 is discharged enter heat exchange unit and carry out waste heat recovery, and flue-gas temperature is down to
550~650 DEG C；
Step 3, carries out cooling treatment to the flue gas of heat exchange unit discharge, is dropped in the time range no more than 2S
To less than 200 DEG C；
Step 4, to flue gas progress purified treatment, the flue gas after purified treatment can be arranged or recycled outside.
Wherein it is preferred to the heat exchange unit includes first order heat exchanger 301, the flue gas that the waste gas combustion furnace 2 is discharged
The combustion air needed for the waste gas combustion furnace 2 is preheated to 300 DEG C~400 DEG C in the first order heat exchanger 301.
Further, the heat exchange unit further includes second level heat exchanger 302, is discharged through the first order heat exchanger 301
Flue gas the combustion air needed for thermal desorption device is preheated to 300 DEG C~350 DEG C in the second level heat exchanger 302.
Embodiment three
The utility model embodiment is related to a kind of organic polluted soil thermal desorption tail gas clean-up processing method, including following step
Suddenly：
Step 1：The tail gas that the processing of organic polluted soil thermal desorption produces removes under the negative pressure that air-introduced machine 7 produces into whirlwind
In dirt device, most of dust in tail gas is removed through cyclone dust collectors；
Step 2：Tail gas after the pre- dedusting of step 1 enters in waste gas combustion furnace 2, and 850 DEG C are heated to by waste gas combustion furnace 2
~1100 DEG C, flue gas 850 DEG C of temperatures above section residence times in incinerator are no less than 2S, ensure that pollutant is thorough in flue gas
Bottom, which is decomposed, to be removed, and will not produce bioxin；
Step 3：Flue gas after step 2 burning disposal successively enters level-one flue gas-air heat exchanger and secondary smoke-sky
In gas heat exchanger, flue-gas temperature is down to 600 DEG C or so from more than 850 DEG C through heat exchanger, level-one flue gas-air heat exchanger and two
Level flue gas-air heat exchanger respectively preheats cold air, to be used as contaminated soil thermal desorption processing equipment and waste gas combustion furnace 2
Combustion air uses；
Step 4：600 DEG C or so of flue gas is cooled to through step 3, enters cooling from secondary smoke-air heat exchanger outlet
In tower 4, cooled down in 4 internal spraying of cooling tower, flue-gas temperature is reduced to 200 DEG C or so from 600 DEG C or so rapidly in 1S, so that
The synthesis temperature region again of bioxin is avoided, reduces the possibility that bioxin produces to greatest extent；
Step 5：200 DEG C or so of flue gas is cooled to through step 4, is entered from the outlet of cooling tower 4 in calcium hydroxide spray tower 5,
Appropriate calcium hydroxide powder is sprayed into flue gas, to remove the acidic materials in flue gas；
Step 6：Flue gas after step 5 depickling processing, is exported into bag filter 6 by calcium hydroxide spray tower 5, is passed through
After 6 further dedusting of bag filter, you can reach discharge standard, big compression ring is emitted into through exhaust tube 8 after being extracted out by air-introduced machine 7
Border.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on, should be included in the utility model
Protection domain within.
Claims (7)
- A kind of 1. organic polluted soil thermal desorption tail gas clean-up processing system, it is characterised in that：Changed including waste gas combustion furnace, flue gas Hot cell, gas cleaning unit and the cooling tower for flue gas to be quickly cooled to less than 200 DEG C, the waste gas combustion furnace, The flue gas heat exchange unit, the cooling tower and the gas cleaning unit are sequentially connected along flue gas circulating direction, and in described Dust removing units are equipped with before waste gas combustion furnace or between the waste gas combustion furnace and the flue gas heat exchange unit.
- 2. organic polluted soil thermal desorption tail gas clean-up processing system as claimed in claim 1, it is characterised in that：The exhaust gas Incinerator includes the burning furnace body section of inner cavity mutual conduction and vertical smoke evacuation furnace body section, and the burning furnace body section is equipped with combustor Structure, the vertical smoke evacuation furnace body section bottom are equipped with ash bucket, and described burning furnace body section one end is equipped with thermal desorption gas inlet, the other end It is connected with the side wall of the vertical smoke evacuation furnace body section and below the exhanst gas outlet of the vertical smoke evacuation furnace body section, it is described vertical The exhanst gas outlet of smoke evacuation furnace body section is connected with the flue gas heat exchange unit.
- 3. organic polluted soil thermal desorption tail gas clean-up processing system as claimed in claim 2, it is characterised in that：The exhaust gas Incinerator further includes horizontal smoke evacuation furnace body section, and described horizontal smoke evacuation furnace body section one end and the flue gas of the vertical smoke evacuation furnace body section go out Mouth connection, the other end are connected with the flue gas heat exchange unit.
- 4. organic polluted soil thermal desorption tail gas clean-up processing system as claimed in claim 1, it is characterised in that：The flue gas Heat exchange unit includes first order heat exchanger, the first order heat exchanger by flue respectively with the waste gas combustion furnace and institute Cooling tower connection is stated, the first order heat exchanger is connected with the first cold air inlet duct and the first hot gas outlet duct, and described the One hot gas outlet duct is connected with the combustion air of the waste gas combustion furnace for pipe.
- 5. organic polluted soil thermal desorption tail gas clean-up processing system as claimed in claim 4, it is characterised in that：The flue gas Heat exchange unit further includes second level heat exchanger, the waste gas combustion furnace, the first order heat exchanger, the second level heat exchanger and The cooling tower is sequentially connected along flue gas circulating direction by flue, and the second level heat exchanger is connected with the second cold air Inlet tube and the second hot gas outlet duct for being connected with the combustion air of thermal desorption device for pipe.
- 6. organic polluted soil thermal desorption tail gas clean-up processing system as claimed in claim 1, it is characterised in that：Further include cloth Bag dust collector and mix cool air hose, the cooling tower, the gas cleaning unit and the bag filter are along flue gas circulating direction Be sequentially connected, it is described mix on the flue being connected to by cool air hose between the gas cleaning unit and the bag filter or Side is connected on the flue between the gas cleaning unit and the cooling tower, and control is equipped with the cool air hose of mixing Valve.
- 7. organic polluted soil thermal desorption tail gas clean-up processing system as claimed in claim 1, it is characterised in that：The flue gas Clean unit includes calcium hydroxide spray tower, and the calcium hydroxide spray tower is connected by flue with the cooling tower, described to disappear Calcium hydroxide spraying and blowing organ is disposed with the tower body of lime spray tower.
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| CN201720864506.6U CN207279647U (en) | 2017-07-17 | 2017-07-17 | A kind of organic polluted soil thermal desorption tail gas clean-up processing system |
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| CN201720864506.6U CN207279647U (en) | 2017-07-17 | 2017-07-17 | A kind of organic polluted soil thermal desorption tail gas clean-up processing system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107388265A (en) * | 2017-07-17 | 2017-11-24 | 武汉都市环保工程技术股份有限公司 | A kind of organic polluted soil thermal desorption tail gas clean-up processing system and method |
| CN110302654A (en) * | 2019-05-09 | 2019-10-08 | 重庆美天环保工程有限公司 | A kind of flue gas purification system and method applied to thermal desorption in soil remediation |
| CN111167847A (en) * | 2020-01-06 | 2020-05-19 | 北京建工环境修复股份有限公司 | Novel ex-situ thermal desorption method and system for efficiently utilizing waste heat in cascade mode |
-
2017
- 2017-07-17 CN CN201720864506.6U patent/CN207279647U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107388265A (en) * | 2017-07-17 | 2017-11-24 | 武汉都市环保工程技术股份有限公司 | A kind of organic polluted soil thermal desorption tail gas clean-up processing system and method |
| CN110302654A (en) * | 2019-05-09 | 2019-10-08 | 重庆美天环保工程有限公司 | A kind of flue gas purification system and method applied to thermal desorption in soil remediation |
| CN111167847A (en) * | 2020-01-06 | 2020-05-19 | 北京建工环境修复股份有限公司 | Novel ex-situ thermal desorption method and system for efficiently utilizing waste heat in cascade mode |
| CN111167847B (en) * | 2020-01-06 | 2021-10-26 | 北京建工环境修复股份有限公司 | Novel ex-situ thermal desorption method and system for efficiently utilizing waste heat in cascade mode |
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