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CN107185956A - A kind of circulating heat supply system and its heat supply method - Google Patents

A kind of circulating heat supply system and its heat supply method Download PDF

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Publication number
CN107185956A
CN107185956A CN201710376000.5A CN201710376000A CN107185956A CN 107185956 A CN107185956 A CN 107185956A CN 201710376000 A CN201710376000 A CN 201710376000A CN 107185956 A CN107185956 A CN 107185956A
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CN
China
Prior art keywords
gas
temperature
outlet
combustion zone
flue gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710376000.5A
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Chinese (zh)
Inventor
赵维维
董博超
田汪洋
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Zhejiang Eco Environmental Technology Co Ltd
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Zhejiang Eco Environmental Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to CN201710376000.5A priority Critical patent/CN107185956A/en
Publication of CN107185956A publication Critical patent/CN107185956A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C1/00Reclamation of contaminated soil
    • B09C1/06Reclamation of contaminated soil thermally
    • B09C1/065Reclamation of contaminated soil thermally by pyrolysis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/40Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Processing Of Solid Wastes (AREA)
  • Gasification And Melting Of Waste (AREA)

Abstract

The present invention relates to soil remediation field, and in particular to a kind of circulating heat supply system and its heat supply method, circulating heat supply system, including burner and pyrolysis desorption apparatus, the burner include, burner and combustion chamber;The pyrolysis desorption apparatus is provided with gas approach, exhanst gas outlet and the outlet of pyrolysis desorption gas;The combustion chamber includes, burning entrance region, the first combustion zone, the second combustion zone, tail gas recycle area and heating exhanst gas outlet;The pyrolysis desorption gas import with pyrolysis desorption gas outlet is provided with second combustion zone, the tail gas recycle area is provided with the back-mixing gas approach connected with exhanst gas outlet, and heating exhanst gas outlet is connected with the gas approach.Present invention eliminates original flue gas dilution device, using low-temperature flue gas temperature adjustment, while make use of the heat energy of low-temperature flue gas, the manufacturing cost of device is saved.

Description

A kind of circulating heat supply system and its heat supply method
Technical field
The present invention relates to soil remediation field, and in particular to a kind of circulating heat supply system and its heat supply method.
Background technology
At present, using the method for pyrolysis desorption, soil middle and high concentration SVOCs and petroleum hydrocarbon pollution will can be removed.Soil During earth is heated, most of SVOCs organic pollutions are not degraded but toward transfer in pyrolysis smoke;If directly Discharge can cause the pollution of environment, while pyrolytic reaction occurs for part larger molecular organicses, cause to contain one in pyrolysis desorption gas The combustible components such as charcoal, CH4, CxHy are aoxidized, directly discharge wastes the energy that this portion gas is included.In addition, generally using With the flue gas of heating, it is necessary to reach suitable heating-up temperature, the manufacture of the mixing arrangement of cold air by being mixed with cold air It is high with operating cost.Equally contain a large amount of heat energy in flue gas after heating, and have larger damage to follow-up flue gas processing device Consumption.
A kind of such as disclosed in CN201510063379.5 organic polluted soil Multi-stage heat repair system, it is de- using two-stage heat Attached mode carries out repair process to soil, and the thermal desorption that the tail gas of the thermal desorption device of high-temperature level is used for low-temperature level is filled The heating put is used.However, still including substantial amounts of heat energy and pollutant in the tail gas of its second level desorption apparatus discharge.It is right In this partial heat energy, the repair system, which does not have, to be made full use of, and for the pollutant in tail gas, then need by substantial amounts of tail Flash Gas Compression Skid System is handled, and does not reach the requirement of energy-conserving and environment-protective.
The content of the invention
There is provided a kind of circulating heat supply system and its heat supply for the problem of purpose of the present invention is to solve in background technology Method.
The present invention above-mentioned technical purpose technical scheme is that:
A kind of circulating heat supply system, including burner and pyrolysis desorption apparatus, the burner include, burner and burning Room;The pyrolysis desorption apparatus is provided with gas approach, exhanst gas outlet and the outlet of pyrolysis desorption gas;The combustion chamber includes, combustion Burn into mouth region, the first combustion zone, the second combustion zone, tail gas recycle area and heating exhanst gas outlet;Set at second combustion zone There is the pyrolysis desorption gas import with pyrolysis desorption gas outlet, the tail gas recycle area is provided with returning of being connected with exhanst gas outlet Mixed gas approach, heating exhanst gas outlet is connected with the gas approach.
Preferably, first combustion zone, the second combustion zone and tail gas recycle area the flow of flue gas direction along along combustion chamber Arrangement.
Preferably, the pyrolysis desorption apparatus includes:Inner furnace body and external furnace body, the inner furnace body are nested in the outer stove Internal portion, the gap between the external furnace body and the inner furnace body is external heat chamber, the gas approach and exhanst gas outlet and institute State the connection of external heat chamber;It is interior heating chamber in the inner furnace body, conveying mechanism is provided with the interior heating chamber, the pyrolysis takes off Attached gas outlet is connected with the interior heating chamber.
A kind of circulation heating method, including:1. fuel is sent into the first combustion zone, burns and produce under burner effect High-temperature flue gas, 2. high-temperature flue gas is cooled to after suitable temperature along burning indoor air flow direction turns into heating flue gas, 3. heats cigarette Gas forms low-temperature flue gas after being handled from gas approach feeding pyrolysis desorption apparatus its materials inside(Tail gas), during which material Pyrolysis gas is produced under the heat effect of heating flue gas, 4. pyrolysis gas enters by being pyrolyzed the outlet of desorption gas from pyrolysis desorption gas import Enter the second combustion zone to be burnt again, low-temperature flue gas(Tail gas)Tail gas recycle is entered from back-mixing gas approach by exhanst gas outlet Area, which with high-temperature flue gas mix, forms heating flue gas after temperature adjustment.
Preferably, the step 3. in, material be arranged on pyrolysis desorption apparatus interior heating chamber in, heating flue gas be passed through Indirectly heat is carried out to material in external heat chamber.
Preferably, temperature is more than 1100 DEG C in first combustion zone.
Preferably, temperature is 850 DEG C~1100 DEG C in second combustion zone.
Preferably, temperature is 500 DEG C~850 DEG C in the tail gas recycle area.
Preferably, being provided with temperature sensor in the tail gas recycle area, the temperature sensor is thermocouple, described Air-regulating valves are provided between exhanst gas outlet and back-mixing gas approach, the Air-regulating valves mutually link with temperature sensor.Work as tail gas When temperature is higher than 1000 DEG C in recovery area, increase the aperture of Air-regulating valves, so as to increase low-temperature flue gas(Tail gas)Inlet;Work as tail When temperature is less than 700 DEG C in gas recovery area, reduce the aperture of Air-regulating valves, so as to reduce low-temperature flue gas(Tail gas)Inlet.
In summary, beneficial effects of the present invention:
1. a kind of circulating heat supply system of the present invention, eliminates original flue gas dilution device, using low-temperature flue gas(Tail Gas)Temperature adjustment, make use of low-temperature flue gas(Tail gas)Heat energy while, save the manufacturing cost of device.
2. a kind of circulating heat supply system and its heat supply method of the present invention, effectively improve heat energy utilization, and pyrolysis is de- Attached gas imports burning again, reduces the usage amount of combustion gas, has saved the energy.
3. a kind of heat supply method of energy-saving and emission-reduction of the present invention, is applied not only to soil remediation, it may also be used for after pollution Oil-sludge treatment, municipal sludge pyrolysis, chemical engineering sludge pyrolysis and other fixed-end forces etc..
Brief description of the drawings
Fig. 1 is the structural representation of the present invention;
Fig. 2 is heat supply method flow chart of the present invention.
Embodiment
Specific examples below is only explanation of the invention, and it is not limitation of the present invention, art technology Personnel can make the modification without creative contribution to the present embodiment as needed after this specification is read, but as long as All protected in scope of the presently claimed invention by Patent Law.
With embodiment, the present invention is described in detail below in conjunction with the accompanying drawings.
Embodiment 1:
According to Fig. 1, a kind of circulating heat supply system, including burner and pyrolysis desorption apparatus 3, burner includes, combustion Burner 1 and combustion chamber 2;Pyrolysis desorption apparatus 3 is provided with gas approach 301, exhanst gas outlet 302 and pyrolysis desorption gas outlet 303; Combustion chamber 2 includes, burning entrance region 201, the first combustion zone 202, the second combustion zone 203, tail gas recycle area 204 and heating flue gas Outlet 205, wherein the first combustion zone 202, the second combustion zone 203 and tail gas recycle area 204 the flow of flue gas direction along along combustion chamber 2 Arrangement;The pyrolysis desorption gas import 2031 connected with pyrolysis desorption gas outlet 303 is provided with second combustion zone 203, tail gas is returned Receive area 204 and be provided with the back-mixing gas approach 2041 connected with exhanst gas outlet 302, heating exhanst gas outlet 205 and gas approach 301 It is connected.
Pyrolysis desorption apparatus 3 includes:Inner furnace body 31 and external furnace body 32, inner furnace body 31 are nested in inside external furnace body 32, outer stove Gap between body 32 and inner furnace body 31 is external heat chamber 321, and gas approach 301 and exhanst gas outlet 302 connect with external heat chamber 321 It is logical;Be that conveying mechanism 312 is provided with interior heating chamber 311, interior heating chamber in inner furnace body 31, pyrolysis desorption gas outlet 303 with it is interior Heating chamber 311 is connected.
According to Fig. 2, a kind of circulation heating method, including:
1. fuel is sent into the first combustion zone 202, burning produces high-temperature flue gas, the first combustion zone 202 under the effect of burner 1 Interior temperature is more than 1100 DEG C;
2. high-temperature flue gas is cooled to after suitable temperature along the interior air-flow direction of combustion chamber 2 turns into heating flue gas;
3. heating flue gas forms low temperature cigarette after being handled from the feeding pyrolysis desorption apparatus 3 of gas approach 301 its materials inside Gas, during which material produce pyrolysis gas under the heat effect of heating flue gas, material is arranged on the interior heating chamber of pyrolysis desorption apparatus 3 In 211, heating flue gas is passed through in external heat chamber 221 carries out indirectly heat to material;
4. pyrolysis gas is carried out again by being pyrolyzed desorption gas outlet 303 from pyrolysis desorption gas import 2031 into the second combustion zone 203 In secondary burning, the second combustion zone 203 temperature be 850 DEG C~1100 DEG C, low-temperature flue gas(Tail gas)By exhanst gas outlet 302 from back-mixing Gas approach 2041 enters tail gas recycle area 204 and mix formation heating flue gas, tail gas recycle area after temperature adjustment with high-temperature flue gas Temperature is 500 DEG C~800 DEG C in 204.
In the process of running, using feedback regulation mode, concrete mode is to be set in tail gas recycle area 204 to the circulatory system There is temperature sensor, temperature sensor is thermocouple, and regulating the qi flowing in the channels is provided between exhanst gas outlet 302 and back-mixing gas approach 2041 Valve, Air-regulating valves mutually link with temperature sensor.When temperature is higher than 1000 DEG C in tail gas recycle area 204, increase Air-regulating valves Aperture, so as to increase low-temperature flue gas(Tail gas)Inlet;When temperature is less than 700 DEG C in tail gas recycle area 204, reduce regulating the qi flowing in the channels The aperture of valve, so as to reduce low-temperature flue gas(Tail gas)Inlet.
Following table is that the technical parameter of the present embodiment heat supply method technical parameter pair and common process is contrasted:
Embodiment 2:
A kind of soil pesticide thermal desorption device disclosed in CN201610276193.2, combustion chamber uses several heat conduction Pipe is directly heated to rotating cylinder, and flue gas is divided into two strands in exhanst gas outlet 302, and one enters follow-up smoke processing system, and another stock leads to Enter tail gas recycle area 204 to temperature adjustment., in this way, can will be additional low because the total amount of low temperature heat smoke is more The timely discharge system of warm flue gas, can prevent the ash content in flue gas from being deposited in pipeline and combustion chamber.
Embodiment 3:
Flue gas is provided with failure safe valve in exhanst gas outlet 302, when the system failure, and the flue gas in tail gas recycle area 204 passes through Valve enters smoke processing system, in this way, and the temperature that can effectively reduce in combustion chamber 2 is discharged in time, can be protected It is pyrolyzed desorption apparatus 3.

Claims (9)

1. a kind of circulating heat supply system, including burner and pyrolysis desorption apparatus(3), it is characterised in that the burner Including burner(1)And combustion chamber(2);The pyrolysis desorption apparatus(3)It is provided with gas approach(301), exhanst gas outlet (302)With the outlet of pyrolysis desorption gas(303);The combustion chamber(2)Including burn entrance region(201), the first combustion zone(202)、 Second combustion zone(203), tail gas recycle area(204)With heating exhanst gas outlet(205);Second combustion zone(203)Place is set Have and the outlet of pyrolysis desorption gas(303)The pyrolysis desorption gas import of connection(2031), the tail gas recycle area(204)Be provided with Exhanst gas outlet(302)The back-mixing gas approach of connection(2041), heat exhanst gas outlet(205)With the gas approach(301)Phase Even.
2. a kind of circulating heat supply system according to claim 1, it is characterised in that first combustion zone(202), second Combustion zone(203)With tail gas recycle area(204)Along combustion chamber(2)Interior flow of flue gas direction arrangement.
3. a kind of circulating heat supply system according to claim 1, it is characterised in that the pyrolysis desorption apparatus(3)Including: Inner furnace body(31)With external furnace body(32), the inner furnace body(31)It is nested in the external furnace body(32)Inside, the external furnace body(32) With the inner furnace body(31)Between gap be external heat chamber(321), the gas approach(301)And exhanst gas outlet(302)With The external heat chamber(321)Connection;The inner furnace body(31)Interior is interior heating chamber(311), it is provided with the interior heating chamber defeated Send mechanism(312), the pyrolysis desorption gas outlet(303)With the interior heating chamber(311)It is connected.
4. a kind of circulation heating method, it is characterised in that including:1. fuel is sent into the first combustion zone(202)It is interior, in burner (1)The lower burning of effect produces high-temperature flue gas, and 2. high-temperature flue gas is along combustion chamber(2)Interior air-flow direction cool to after suitable temperature into For heating flue gas, flue gas is 3. heated from gas approach(301)Feeding pyrolysis desorption apparatus(3)After handling its materials inside Low-temperature flue gas is formed, during which material produces pyrolysis desorption gas under the heat effect of heating flue gas, 4. pyrolysis desorption gas passes through heat The outlet of solution desorption gas(303)Gas import is desorbed from pyrolysis(2031)Into the second combustion zone(203)Burnt again, low temperature cigarette Gas passes through exhanst gas outlet(302)From back-mixing gas approach(2041)Into tail gas recycle area(204)Mixed with high-temperature flue gas Heating flue gas is formed after temperature adjustment.
5. a kind of circulation heating method according to claim 4, it is characterised in that the step 3. in, material is arranged on It is pyrolyzed desorption apparatus(3)Interior heating chamber(211)In, heating flue gas is passed through external heat chamber(221)In to material carry out indirectly plus Heat.
6. a kind of circulation heating method according to claim 4, it is characterised in that first combustion zone(202)Interior temperature Degree is more than 1100 DEG C.
7. a kind of circulation heating method according to claim 4, it is characterised in that second combustion zone(203)Interior temperature Spend for 850 DEG C~1100 DEG C.
8. a kind of circulation heating method according to claim 4, it is characterised in that the tail gas recycle area(204)Interior temperature Spend for 500 DEG C~850 DEG C.
9. a kind of circulation heating method according to claim 8, it is characterised in that the tail gas recycle area(204)Inside set It is equipped with temperature sensor, the exhanst gas outlet(302)With back-mixing gas approach(2041)Between be provided with Air-regulating valves, the regulating the qi flowing in the channels Valve mutually links with temperature sensor.
CN201710376000.5A 2017-05-25 2017-05-25 A kind of circulating heat supply system and its heat supply method Pending CN107185956A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108714621A (en) * 2018-05-23 2018-10-30 昆明理工大学 A kind of thermal desorption handles the method and system of organic polluted soil and desorption exhaust-gas treatment
CN114904903A (en) * 2022-05-27 2022-08-16 江苏省环境科学研究院 Quick emergency thermal desorption device for petroleum hydrocarbon leakage contaminated soil

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102218446A (en) * 2011-05-09 2011-10-19 北京生态岛科技有限责任公司 Thermal desorption method for contaminated soil
CN103990645A (en) * 2014-05-12 2014-08-20 中节能六合天融环保科技有限公司 A thermal desorption method for treating organically contaminated soil by utilization of boiler flue gas
CN204247684U (en) * 2014-11-21 2015-04-08 中冶赛迪工程技术股份有限公司 The contaminated soil thermal desorption system of the efficient reuse of a kind of waste heat
CN105583221A (en) * 2016-02-25 2016-05-18 北京神雾环境能源科技集团股份有限公司 Soil restoration system and soil restoration method thereof
CN106635081A (en) * 2017-01-25 2017-05-10 浙江宜可欧环保科技有限公司 Pyrolyzation and desorption device for sludge
CN107138515A (en) * 2017-05-25 2017-09-08 浙江宜可欧环保科技有限公司 A kind of heat supply method of energy-saving and emission-reduction

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102218446A (en) * 2011-05-09 2011-10-19 北京生态岛科技有限责任公司 Thermal desorption method for contaminated soil
CN103990645A (en) * 2014-05-12 2014-08-20 中节能六合天融环保科技有限公司 A thermal desorption method for treating organically contaminated soil by utilization of boiler flue gas
CN204247684U (en) * 2014-11-21 2015-04-08 中冶赛迪工程技术股份有限公司 The contaminated soil thermal desorption system of the efficient reuse of a kind of waste heat
CN105583221A (en) * 2016-02-25 2016-05-18 北京神雾环境能源科技集团股份有限公司 Soil restoration system and soil restoration method thereof
CN106635081A (en) * 2017-01-25 2017-05-10 浙江宜可欧环保科技有限公司 Pyrolyzation and desorption device for sludge
CN107138515A (en) * 2017-05-25 2017-09-08 浙江宜可欧环保科技有限公司 A kind of heat supply method of energy-saving and emission-reduction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108714621A (en) * 2018-05-23 2018-10-30 昆明理工大学 A kind of thermal desorption handles the method and system of organic polluted soil and desorption exhaust-gas treatment
CN114904903A (en) * 2022-05-27 2022-08-16 江苏省环境科学研究院 Quick emergency thermal desorption device for petroleum hydrocarbon leakage contaminated soil

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Application publication date: 20170922