CN109012017B - Exhaust gas treatment system and method - Google Patents
Exhaust gas treatment system and method Download PDFInfo
- Publication number
- CN109012017B CN109012017B CN201810837826.1A CN201810837826A CN109012017B CN 109012017 B CN109012017 B CN 109012017B CN 201810837826 A CN201810837826 A CN 201810837826A CN 109012017 B CN109012017 B CN 109012017B
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- kiln
- brick
- preheating
- waste gas
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000011449 brick Substances 0.000 claims abstract description 62
- 239000002912 waste gas Substances 0.000 claims abstract description 56
- 239000007789 gas Substances 0.000 claims abstract description 54
- 238000004321 preservation Methods 0.000 claims abstract description 35
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 239000011229 interlayer Substances 0.000 claims abstract description 22
- 238000002485 combustion reaction Methods 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 230000007704 transition Effects 0.000 claims description 9
- 238000001179 sorption measurement Methods 0.000 claims description 8
- 238000010304 firing Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 231100000701 toxic element Toxicity 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 239000002341 toxic gas Substances 0.000 description 7
- 238000009841 combustion method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
Abstract
The invention discloses an exhaust gas treatment system and method, wherein the system comprises a tunnel brick kiln, the tunnel brick kiln is sequentially provided with a preheating section, a combustion section, a heat preservation section and a cooling section, a brick feeding port is arranged at the head end of the preheating section, a brick discharging port is arranged at the tail end of the cooling section, an air inlet is further arranged at the tail end of the cooling section, an exhaust port is arranged at the top of the head end of the preheating section, an exhaust gas preheating interlayer is further arranged at the top of the kiln body of the tunnel brick kiln, and an air outlet of the exhaust gas preheating interlayer is arranged above the heat preservation section. The effect is that: through improving kiln body structure and mode of admitting air, utilize the waste gas at kiln body top to preheat the intermediate layer and carry out preheating treatment to waste gas, then get into the kiln chamber from the heat preservation section, waste gas outwards discharges after heat preservation section, burning section and preheating section in proper order, has both prolonged the dead time of waste gas in the kiln body, ensures that waste gas fully handles, has avoided the great waste gas of difference in temperature to introduce suddenly again and has fired the influence to the brick body, has guaranteed brick body quality.
Description
Technical Field
The invention belongs to the technical field of energy conservation and environmental protection, and particularly relates to an exhaust gas treatment system and method.
Background
Waste gas discharged from industrial production often has harmful effects on the environment and human health, and before being discharged into the atmosphere, purification measures are adopted to treat the waste gas so as to meet the requirements of waste gas emission standards.
The existing waste gas treatment mostly adopts an adsorption method or a combustion method, the adsorption method needs special equipment for treatment, the process is relatively complex, the combustion method often has insufficient combustion, and the safety cannot be ensured. Particularly, in the treatment of waste gas after the waste incineration treatment/the pyrolysis gasification treatment, toxic gases such as dioxin are contained in the waste gas, and the waste gas is not sufficiently treated, which has very serious consequences.
For example, in the method disclosed in chinese patent 200810064577.3 for incineration treatment of household garbage, the tail gas is deacidified and dedusted, and then sent into a vertical kiln for secondary combustion, so that toxic gas in the waste gas is removed, but the defect is that: the utilization rate of the exhaust gas is low, and toxic gas is easy to remain when the combustion is insufficient.
Chinese patent 201210075826.5 also discloses a method for cooperatively disposing household garbage by using a tunnel kiln baked brick production line and a disposal system thereof, wherein the system not only can comprehensively utilize waste residues after the household garbage disposal, but also can fully utilize the high-temperature environment of the tunnel kiln to remove toxic gases in waste gas, but the waste gas directly enters from the high-temperature section of the tunnel kiln after heat exchange, thus easily influencing the firing quality of bricks in the kiln, ensuring too short residence time in the kiln and still not sufficiently treating the toxic gases.
Disclosure of Invention
Based on the defects, the invention firstly provides the waste gas treatment system which fully utilizes the high-temperature environment in the tunnel kiln and the adsorption function of the brick body in the high-temperature environment, and introduces the waste gas into the tunnel kiln for treatment through the heat preservation section, so that the firing quality of the brick body is not affected, and toxic gas in the waste gas can be removed.
In order to achieve the above purpose, the specific technical scheme adopted by the invention is as follows:
an exhaust gas treatment system, which is characterized in that: the device comprises a tunnel brick kiln, wherein the tunnel brick kiln is sequentially provided with a preheating section, a combustion section, a heat preservation section and a cooling section, the head end of the preheating section is provided with a brick feeding port, the tail end of the cooling section is provided with a brick discharging port, the tail end of the cooling section is further provided with an air inlet, the top of the head end of the preheating section is provided with an exhaust port, the top of the kiln body of the tunnel brick kiln is further provided with an exhaust gas preheating interlayer, the exhaust gas preheating interlayer is provided with an air inlet and an air outlet, the air inlet is used for connecting an exhaust gas discharge pipe, the air outlet is arranged above the heat preservation section, and the preheated exhaust gas is sent from the heat preservation section to the tunnel brick kiln for treatment.
Optionally, the waste gas preheating interlayer is arranged right above the heat preservation section, the waste gas preheating interlayer is divided into a waste gas preheating section and a split air outlet section according to the temperature inside the brickkiln, the waste gas preheating section is positioned in a low temperature area of the heat preservation section, the air inlet is arranged at the low temperature end of the waste gas preheating section, the split air outlet section is positioned in a high temperature area of the heat preservation section, and a gas split hole communicated with a kiln cavity of the heat preservation section is arranged.
Optionally, the low temperature end of the exhaust gas preheating section extends backwards to a position right above the first half of the cooling section, and exhaust gas enters the exhaust gas preheating interlayer from an air inlet above the cooling section.
Optionally, an S-shaped air duct is provided in the exhaust gas preheating interlayer, and the S-shaped air duct extends from the low temperature area to the high temperature area in sequence.
Optionally, the temperature of the preheating section is 10-500 ℃, the temperature of the combustion section is 500-1100 ℃, the temperature of the heat preservation section is 1100-800 ℃, and the temperature of the cooling section is 800-10 ℃.
Optionally, the exhaust port is also connected with a gas purifying device.
Optionally, a brick transition section is arranged at the head end of the preheating section, a first sealing door is arranged at the front end of the brick transition section, and a second sealing door is arranged at the rear end of the brick transition section.
Based on the system design, the invention also provides an exhaust gas treatment method, which is characterized in that: and (3) sending the waste gas into a tunnel kiln for firing the brick body, and eliminating toxic elements in the waste gas by utilizing the high-temperature environment in the tunnel kiln and the adsorption capacity of the brick body, wherein the waste gas is sent from a heat preservation section of the tunnel kiln, fresh air is sent from a cooling section of the tunnel kiln, and tail gas is discharged from a preheating section of the tunnel kiln.
Optionally, an exhaust gas preheating interlayer is arranged at the top of the heat preservation section of the tunnel brick kiln, and the exhaust gas is sent into the heat preservation section after being preheated.
Optionally, the bricks in the tunnel kiln are stacked in a staggered manner, and air gaps are reserved among the bricks.
The beneficial effects of the invention are as follows:
through improving tunnel brick kiln body structure and mode of admitting air, utilize the waste gas at kiln body top to preheat the intermediate layer and carry out preheating treatment to waste gas, then follow the heat preservation section and get into the kiln chamber, waste gas outwards discharges after heat preservation section, burning section and preheating section in proper order, has both prolonged the dead time of waste gas in the kiln body, ensures that waste gas fully handles, has avoided the great waste gas of difference in temperature to introduce suddenly again and has fired the influence to the brick body, has guaranteed brick body quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of a system architecture of the present invention;
FIG. 2 is a schematic diagram of an exhaust gas preheating interlayer according to an embodiment of the present invention;
fig. 3 is a view showing a stacking state of bricks in a kiln body according to an embodiment of the present invention.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
As shown in fig. 1, the waste gas treatment system adopts a tunnel brick kiln, and the tunnel brick kiln is sequentially provided with a preheating section, a combustion section, a heat preservation section and a cooling section according to the temperature, wherein the temperature of the preheating section is 10-500 ℃, the temperature of the combustion section is 500-1100 ℃, the temperature of the heat preservation section is 1100-800 ℃, and the temperature of the cooling section is 800-10 ℃.
The kiln body is characterized in that a brick body feeding port is formed in the head end of the preheating section, a brick body discharging port is formed in the tail end of the cooling section, an air inlet is further formed in the tail end of the cooling section, an exhaust port is formed in the top of the head end of the preheating section, an exhaust gas preheating interlayer is further formed in the top of the kiln body of the tunnel kiln, an air blower can be arranged in the air inlet, an induced draft fan can be arranged in the exhaust port during specific implementation, the air blower can ensure that enough fresh air is introduced, the kiln is fully combusted, the cooling section can be rapidly cooled, and the exhaust gas backflow can be prevented by being matched with the induced draft fan.
As can be seen from fig. 2, the exhaust gas preheating interlayer is provided with an air inlet and an air outlet, the air inlet is used for connecting an exhaust gas discharge pipe, the air outlet is arranged above the heat insulation section, and the preheated exhaust gas is sent into the tunnel brick kiln from the heat insulation section for treatment.
In the embodiment, the exhaust gas preheating interlayer is arranged right above the heat preservation section and right above the first half part of the cooling section, the exhaust gas preheating interlayer is divided into an exhaust gas preheating section and a split air outlet section according to the internal temperature of the brickkiln, the exhaust gas preheating section is positioned in the low temperature area of the heat preservation section, the air inlet is arranged at the low temperature end of the exhaust gas preheating section, the split air outlet section is positioned in the high temperature area of the heat preservation section, and the air split holes are arranged in the air split holes communicated with the kiln cavity of the heat preservation section.
The gas diversion holes can avoid the influence of the reduction of the local temperature in the kiln body caused by the concentrated introduction of a large amount of waste gas, and in order to ensure the full preheating of the waste gas, an S-shaped air channel is arranged in the waste gas preheating interlayer, and the S-shaped air channel sequentially extends from a low temperature region to a high temperature region.
In order to further reduce the emission of pollutants, the exhaust port is also connected with a gas purifying device.
When the preheating section is specifically implemented, the front end of the preheating section is provided with the brick body transition section, the front end of the brick body transition section is provided with the first sealing door, and the rear end of the brick body transition section is provided with the second sealing door, so that the design can prevent the exhaust emission during brick body feeding, and ensure the safety of the system.
Based on the system design, it can be understood that when the waste gas treatment is carried out, the waste gas is sent into the tunnel kiln for firing the brick body, toxic elements in the waste gas are eliminated by utilizing the high-temperature environment inside the tunnel kiln and the adsorption capacity of the brick body, wherein the waste gas is sent from the heat preservation section of the tunnel kiln, fresh air is sent from the cooling section of the tunnel kiln, and the tail gas is discharged from the preheating section of the tunnel kiln. In order to prevent the damage to the brick body caused by the direct introduction of low-temperature waste gas into the kiln cavity, the top of the heat-preserving section of the tunnel kiln is provided with a waste gas preheating interlayer, and the waste gas is sent into the heat-preserving section after being preheated.
As shown in fig. 3, in order to make the waste gas fully contact with the bricks, to promote the adsorption capacity, the bricks inside the tunnel kiln are stacked alternately, and gas gaps are reserved between the bricks.
In summary, the exhaust gas treatment system and the method provided by the invention not only utilize the high-temperature combustion environment of the tunnel brick kiln to realize the full utilization of the combustion heat of the exhaust gas, but also utilize the combustion and the adsorption performance of the brick body to remove toxic gases in the exhaust gas, and the exhaust gas enters the kiln cavity after being preheated in the operation process of the system, so that the temperature difference is small, the firing of the brick body is not influenced, and the exhaust gas is introduced from the heat preservation section, so that the dead time in the tunnel brick kiln is prolonged, and the full treatment of the exhaust gas is ensured.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
Claims (8)
1. An exhaust treatment system, characterized by: the device comprises a tunnel brick kiln, wherein the tunnel brick kiln is sequentially provided with a preheating section, a combustion section, a heat preservation section and a cooling section, the head end of the preheating section is provided with a brick feeding port, the tail end of the cooling section is provided with a brick discharging port, the tail end of the cooling section is further provided with an air inlet, the top of the head end of the preheating section is provided with an air outlet, the air inlet is provided with a blower, the air outlet is provided with an induced draft fan, the top of the kiln body of the tunnel brick kiln is further provided with an exhaust gas preheating interlayer, the exhaust gas preheating interlayer is provided with an air inlet and an air outlet, the air inlet is used for being connected with an exhaust gas discharge pipe, the air outlet is arranged above the heat preservation section, and the preheated exhaust gas is sent into the tunnel brick kiln from the heat preservation section for treatment;
the waste gas preheating interlayer is arranged right above the heat preservation section, the waste gas preheating interlayer is divided into a waste gas preheating section and a split air outlet section according to the internal temperature of the brickkiln, the waste gas preheating section is positioned in a low-temperature area of the heat preservation section, the air inlet is arranged at the low-temperature end of the waste gas preheating section, the split air outlet section is positioned in a high-temperature area of the heat preservation section, and a gas split hole communicated with a kiln cavity of the heat preservation section is arranged.
2. The exhaust treatment system of claim 1, wherein: the low-temperature end of the waste gas preheating section extends to the position right above the front half part of the cooling section, and waste gas enters the waste gas preheating interlayer from the air inlet above the cooling section.
3. An exhaust treatment system according to claim 1 or 2, characterized in that: an S-shaped air duct is arranged in the exhaust gas preheating interlayer, and the S-shaped air duct extends from a low temperature area to a high temperature area in sequence.
4. The exhaust treatment system of claim 1, wherein: the temperature of the preheating section is 10-500 ℃, the temperature of the combustion section is 500-1100 ℃, the temperature of the heat preservation section is 1100-800 ℃, and the temperature of the cooling section is 800-10 ℃.
5. The exhaust treatment system of claim 1, wherein: and the exhaust port is also connected with a gas purifying device.
6. The exhaust treatment system of claim 1, wherein: the front end of the preheating section is provided with a brick transition section, the front end of the brick transition section is provided with a first sealing door, and the rear end of the brick transition section is provided with a second sealing door.
7. A method of treating exhaust gas using the exhaust gas treatment system according to any one of claims 1 to 6, characterized in that: and (3) sending the waste gas into a tunnel kiln for firing the brick body, and eliminating toxic elements in the waste gas by utilizing the high-temperature environment in the tunnel kiln and the adsorption capacity of the brick body, wherein the waste gas is sent from a heat preservation section of the tunnel kiln, fresh air is sent from a cooling section of the tunnel kiln, and tail gas is discharged from a preheating section of the tunnel kiln.
8. The exhaust gas treatment method according to claim 7, characterized in that: the brick bodies in the tunnel brick kiln are stacked in a staggered way, and air gaps are reserved among the brick bodies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810837826.1A CN109012017B (en) | 2018-07-26 | 2018-07-26 | Exhaust gas treatment system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810837826.1A CN109012017B (en) | 2018-07-26 | 2018-07-26 | Exhaust gas treatment system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109012017A CN109012017A (en) | 2018-12-18 |
| CN109012017B true CN109012017B (en) | 2024-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810837826.1A Active CN109012017B (en) | 2018-07-26 | 2018-07-26 | Exhaust gas treatment system and method |
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| Country | Link |
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| CN (1) | CN109012017B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322863A (en) * | 2020-03-10 | 2020-06-23 | 湖南新天力科技有限公司 | Method and system for adjusting process atmosphere of roller kiln |
| CN113375152A (en) * | 2021-05-27 | 2021-09-10 | 襄阳中和机电技术有限公司 | Combustion control system for heating hood of lithium salt acidification kiln |
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|---|---|---|---|---|
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| JP2004162963A (en) * | 2002-11-12 | 2004-06-10 | Sumitomo Electric Ind Ltd | Gas heating method and heating device |
| DE102009018691A1 (en) * | 2009-04-23 | 2010-10-28 | Ziegelwerk Bellenberg Wiest Gmbh & Co. Kg | Fuel mixture, useful for the manufacture of bricks, tiles or other ceramic products in kilns, comprises a solid fuel, which is mixed with a heat-curable additive |
| CN103322574A (en) * | 2012-03-21 | 2013-09-25 | 四川国立能源科技有限公司 | Method for co-processing household garbage by using tunnel kiln sintered brick production line and processing system thereof |
| CN106871636A (en) * | 2015-12-12 | 2017-06-20 | 黄冈市中洲安达热工设备有限公司 | Industrial Stoves organic exhaust gas are burned and recycle production technology and equipments |
| CN106881336A (en) * | 2017-04-14 | 2017-06-23 | 重庆秋松环保科技有限公司 | Refuse disposal system |
| CN107917427A (en) * | 2017-11-03 | 2018-04-17 | 南京凯盛开能环保能源有限公司 | A kind of system and method for cement kiln synergic processing house refuse |
| CN108302934A (en) * | 2018-03-12 | 2018-07-20 | 练其辉 | A kind of tunnel oven using Heat Treatment organic waste |
| CN208771211U (en) * | 2018-07-26 | 2019-04-23 | 重庆秋松环保科技有限公司 | A kind of exhaust treatment system |
-
2018
- 2018-07-26 CN CN201810837826.1A patent/CN109012017B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4136477A1 (en) * | 1991-11-06 | 1993-05-13 | Haessler Andreas Dipl Ing Fh | Combined tunnel drier and furnace for firing ceramic parts - has integral thermal gas purifier inside furnace |
| DE4412170C1 (en) * | 1994-04-08 | 1995-08-10 | Krantz Tkt Gmbh | Harmful gas emissions oxidn. by cool extn. and hot return to tunnel furnace |
| JP2004162963A (en) * | 2002-11-12 | 2004-06-10 | Sumitomo Electric Ind Ltd | Gas heating method and heating device |
| DE102009018691A1 (en) * | 2009-04-23 | 2010-10-28 | Ziegelwerk Bellenberg Wiest Gmbh & Co. Kg | Fuel mixture, useful for the manufacture of bricks, tiles or other ceramic products in kilns, comprises a solid fuel, which is mixed with a heat-curable additive |
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| CN109012017A (en) | 2018-12-18 |
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