CN103851633A - Tail gas purification and waste-heat utilization method for multi-hearth furnace - Google Patents
Tail gas purification and waste-heat utilization method for multi-hearth furnace Download PDFInfo
- Publication number
- CN103851633A CN103851633A CN201410058367.9A CN201410058367A CN103851633A CN 103851633 A CN103851633 A CN 103851633A CN 201410058367 A CN201410058367 A CN 201410058367A CN 103851633 A CN103851633 A CN 103851633A
- Authority
- CN
- China
- Prior art keywords
- tail gas
- waste
- hearth furnace
- heat
- scrubbing tower
- 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
Links
- 239000007789 gas Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000002918 waste heat Substances 0.000 title claims abstract description 23
- 238000000746 purification Methods 0.000 title abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 238000005201 scrubbing Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 12
- 239000003546 flue gas Substances 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 238000005406 washing Methods 0.000 abstract description 5
- 239000000779 smoke Substances 0.000 abstract 4
- 239000002253 acid Substances 0.000 abstract 2
- 239000003513 alkali Substances 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000005539 carbonized material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The invention discloses a tail gas purification and waste-heat utilization method for a multi-hearth furnace. The method comprises the following steps: (1) introducing tail gas generated by the multi-hearth furnace into an afterburner for combustion; (2) introducing smoke generated by the combustion into a waste-heat boiler for waste-heat recycle; (3) introducing the smoke after the waste-heat recycle into a venturi tube and a washing tower in sequence, so as to remove impurities in the smoke through washing; discharging the smoke from an outlet at the top of the washing tower. According to the method provided by the invention, the low-concentration tail gas can be stably combusted in a stable temperature condition. The afterburner is 4-5 times as large as that of an ordinary hearth in space, so that the combustion time of the tail gas is prolonged. Therefore, the combustible tail gas can be sufficiently combusted. Meanwhile, waste heat carried by the tail gas enters a waste-heat boiler for recycle. The combusted tail gas includes acid gas, so that alkali substances are added into the venturi tube and the washing tower to neutralize and remove the acid gas. Therefore, the tail gas reaches an atmosphere emission standard.
Description
Technical field
The present invention relates to a kind of multiple hearth furnace tail gas clean-up and process and residual-heat utilization method, belong to the using waste heat from tail gas utilization of multiple hearth furnace low concentration and field of purification.
Background technology
Utilize at present multiple hearth furnace to produce in active carbon or regenerated carbon process, at high temperature there is specific gasification reaction with oxygen or steam in carbonized material, generates a large amount of gaseous by-product, and emit a large amount of heat.Can be accompanied by the fuel gas that produces low concentration (as CO, CH simultaneously
4deng) and solid combustible tail gas.Because its concentration is low, the restriction of equipment and fresh water (FW) equality factor, can not directly utilize.If with exhaust emissions to atmosphere, not only atmosphere pollution but also cause energy waste.Because multiple hearth furnace is the external equipment of introducing, give full play to the advantage of this equipment, reduce its pollution to atmosphere and utilize the waste heat that is produced fuel gas by it aspect tail gas, will the development of promoting enterprise and the improvement of environment.
Summary of the invention
The object of this invention is to provide a kind of multiple hearth furnace tail gas clean-up processes and residual-heat utilization method, the present invention can fully burn the low-concentration combustibles in multiple hearth furnace tail gas, realize the UTILIZATION OF VESIDUAL HEAT IN of low concentration tail gas, tail gas, by cleaning equipment, is realized to multiple hearth furnace tail gas clean-up object.
A kind of multiple hearth furnace tail gas clean-up provided by the present invention is processed and residual-heat utilization method, comprises the steps:
(1) tail gas that multiple hearth furnace produces enters in afterburner and burns;
(2) flue gas that described burning produces enters and in waste heat boiler, carries out waste heat recovery;
(3) flue gas after waste heat recovery enters Venturi tube and scrubbing tower successively, to wash the impurity of removing in described flue gas; Then discharge from the top exit of described scrubbing tower.
In above-mentioned method, in the recirculated water that described scrubbing tower uses, add alkaline matter, to neutralize the sour gas in described flue gas, the addition of wherein said alkaline matter can regulate and control according to the sulfur content of flue gas, and described alkaline matter can be NaOH, KOH, Na
2cO
3or K
2cO
3deng.
In above-mentioned method, the volume of described afterburner is 4～5 times of siege of described multiple hearth furnace, to ensure the abundant burning of tail gas.
In above-mentioned method, the temperature of the recirculated water that described scrubbing tower uses can be 60 DEG C～85 DEG C.
In above-mentioned method, the top exit of described scrubbing tower is connected with a chimney by an air-introduced machine, to reduce the temperature of the rear flue gas of burning.
Method provided by the invention, can realize low concentration tail gas and under equilibrium temperature condition, carry out smooth combustion; Because afterburner space is 4～5 times of general burner hearth, increase the time of exhaust combustion, flammable tail gas can fully be burnt; The waste heat carrying of tail gas enters waste heat boiler and utilizes recovery simultaneously.Owing to containing sour gas in tail gas after burning, therefore in venturi and scrubbing tower, add alkaline matter and neutralize to remove sour gas, make tail gas reach atmospheric emission standard.
Brief description of the drawings
Fig. 1 is the flow chart of multiple hearth furnace tail gas clean-up processing of the present invention and residual-heat utilization method.
Detailed description of the invention
The experimental technique using in following embodiment if no special instructions, is conventional method.
Material, reagent etc. used in following embodiment, if no special instructions, all can obtain from commercial channels.
According to the flow process shown in Fig. 1, the tail gas of multiple hearth furnace is carried out to UTILIZATION OF VESIDUAL HEAT IN and purified treatment, concrete steps are as follows: the tail gas (N that multiple hearth furnace bottom produces
2, CO
2, CO, CH
4, NO
x, SO
xdeng) enter in afterburner by the aperture top layer of siege, under the effect of the burner of installing in afterburner, burn.Because the volume of afterburner is 4～5 times of individual layer siege, tail gas can be realized abundant burning in afterburner.High-temperature tail gas (approximately 980 DEG C) after burning, enters successively and in waste heat boiler, carries out waste heat recovery.High-temperature tail gas temperature after waste heat boiler is reduced to approximately 200 DEG C, and this part heat can reclaim for generation of steam or generating and use.The multiple hearth furnace high-temperature tail gas that waste heat recovery can reach 10,000 tons of active carbons of 70～80%(annual output reclaims and can obtain 15 tons of steam through waste heat boiler, and this steam can be prepared other workshop section's use or communal facility use for active carbon).Enter successively in Venturi tube and scrubbing tower through the flue gas of waste heat recovery, to remove dust and sulfur, wherein, the recirculated water that scrubbing tower uses contains alkaline matter (K
2cO
3), the temperature of recirculated water is 65 DEG C.After the acidic materials in flue gas are removed in washing, then enter in atmosphere by chimney through air-introduced machine.
Flue gas after the present invention purifies only contains N
2with a small amount of CO
2.The SO producing in stove
xand NO
xby in alkaline matter and after be almost trace, reach good gas cleaning effect.
Scrubbing tower is not harsh to the requirement of water quality, and industry water just can meet the demands.According to the component of active carbon, regulate the pH value of water.The water of scrubbing tower can recycle, but need to increase the filtration, purification processing of water, makes the rate capable of circulation of water be greater than 80%, reduces water loss.
Claims (5)
1. multiple hearth furnace tail gas clean-up is processed and a residual-heat utilization method, comprises the steps:
(1) tail gas that multiple hearth furnace produces enters in afterburner and burns;
(2) flue gas that described burning produces enters and in waste heat boiler, carries out waste heat recovery;
(3) flue gas after waste heat recovery enters Venturi tube and scrubbing tower successively, to wash the impurity of removing in described flue gas; Then discharge from the top exit of described scrubbing tower.
2. method according to claim 1, is characterized in that: in the recirculated water that described scrubbing tower uses, add alkaline matter.
3. method according to claim 1 and 2, is characterized in that: the volume of described afterburner is 4～5 times of siege of described multiple hearth furnace.
4. according to the method described in any one in claim 1-3, it is characterized in that: the temperature of the recirculated water that described scrubbing tower uses is 60 DEG C～85 DEG C.
5. according to the method described in any one in claim 1-4, it is characterized in that: the top exit of described scrubbing tower is connected with a chimney by an air-introduced machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410058367.9A CN103851633A (en) | 2014-02-20 | 2014-02-20 | Tail gas purification and waste-heat utilization method for multi-hearth furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410058367.9A CN103851633A (en) | 2014-02-20 | 2014-02-20 | Tail gas purification and waste-heat utilization method for multi-hearth furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103851633A true CN103851633A (en) | 2014-06-11 |
Family
ID=50859605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410058367.9A Pending CN103851633A (en) | 2014-02-20 | 2014-02-20 | Tail gas purification and waste-heat utilization method for multi-hearth furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103851633A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107344066A (en) * | 2017-07-28 | 2017-11-14 | 象州县科学技术情报研究所 | Calcinated argil preparation process tail gas treatment process |
| CN107816731A (en) * | 2017-11-21 | 2018-03-20 | 无锡市洗选设备厂 | A kind of coal particles drying process device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001220121A (en) * | 2000-02-10 | 2001-08-14 | Nkk Design & Engineering Corp | Method for manufacturing activated carbon from waste and manufacturing device |
| JP2001241624A (en) * | 2000-02-25 | 2001-09-07 | Nkk Design & Engineering Corp | Waste-incinerating plant |
| JP2009179485A (en) * | 2006-04-10 | 2009-08-13 | Ipb:Kk | Activated carbon, method for producing the same, and production apparatus |
| CN203364626U (en) * | 2013-02-28 | 2013-12-25 | 尚鼎炉业科技（扬州）有限公司 | Multistage furnace tail gas lead-out apparatus |
| CN103484138A (en) * | 2013-09-24 | 2014-01-01 | 尚鼎炉业科技（扬州）有限公司 | Manufacturing process and equipment of bamboo charcoal |
-
2014
- 2014-02-20 CN CN201410058367.9A patent/CN103851633A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001220121A (en) * | 2000-02-10 | 2001-08-14 | Nkk Design & Engineering Corp | Method for manufacturing activated carbon from waste and manufacturing device |
| JP2001241624A (en) * | 2000-02-25 | 2001-09-07 | Nkk Design & Engineering Corp | Waste-incinerating plant |
| JP2009179485A (en) * | 2006-04-10 | 2009-08-13 | Ipb:Kk | Activated carbon, method for producing the same, and production apparatus |
| CN203364626U (en) * | 2013-02-28 | 2013-12-25 | 尚鼎炉业科技（扬州）有限公司 | Multistage furnace tail gas lead-out apparatus |
| CN103484138A (en) * | 2013-09-24 | 2014-01-01 | 尚鼎炉业科技（扬州）有限公司 | Manufacturing process and equipment of bamboo charcoal |
Non-Patent Citations (3)
| Title |
|---|
| 傅翔: "多膛炉在活性炭工业上的应用", 《洁净煤技术》 * |
| 姜成春等: "《大气污染控制技术》", 31 July 2009, 中国环境科学出版社 * |
| 王文才: "《粉尘与有毒有害气体防治技术》", 31 August 2012, 内蒙古大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107344066A (en) * | 2017-07-28 | 2017-11-14 | 象州县科学技术情报研究所 | Calcinated argil preparation process tail gas treatment process |
| CN107816731A (en) * | 2017-11-21 | 2018-03-20 | 无锡市洗选设备厂 | A kind of coal particles drying process device |
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Owner name: CHINA COAL RESEARCH INSTITUTE CO., LTD. Free format text: FORMER OWNER: COAL GENERAL ACADEMY Effective date: 20140915 |
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Effective date of registration: 20140915 Address after: 100013 No. 5 Youth Road, Beijing, Chaoyang District Applicant after: Co., Ltd of coal science and technology academy Address before: 100013 No. 5 Youth Road, Beijing, Chaoyang District Applicant before: General Research Institute of Coal Science |
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Owner name: CSE TECHNOLOGY (BEIJING) CO., LTD. Effective date: 20141020 |
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| CB03 | Change of inventor or designer information |
Inventor after: Fu Xiang Inventor after: Lin Hanneng Inventor after: Cheng Zhangyuan Inventor after: Fu Jiaxing Inventor after: Wang Peng Inventor after: Liang Daming Inventor after: Wu Tao Inventor after: Xiong Yinwu Inventor after: Sun Zhongchao Inventor after: Guo Liangyuan Inventor after: Li Xiaoliang Inventor after: Zhang Jinhua Inventor before: Fu Xiang Inventor before: Wang Peng Inventor before: Liang Daming Inventor before: Wu Tao Inventor before: Xiong Yinwu Inventor before: Sun Zhongchao Inventor before: Guo Liangyuan Inventor before: Li Xiaoliang Inventor before: Zhang Jinhua |
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Free format text: CORRECT: INVENTOR; FROM: FU XIANG WANG PENG LIANG DAMING WU TAO XIONG YINWU SUN ZHONGCHAO GUO LIANGYUAN LI XIAOLIANG ZHANG JINHUA TO: FU XIANG WANG PENG LIANG DAMING WU TAO XIONG YINWU SUN ZHONGCHAO GUO LIANGYUAN LI XIAOLIANG ZHANG JINHUA LIN HANNENG CHENG ZHANGYUAN FU JIAXING |
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Effective date of registration: 20141020 Address after: 100013 No. 5 Youth Road, Beijing, Chaoyang District Applicant after: Co., Ltd of coal science and technology academy Applicant after: Beijing HS Technology Co., Ltd. Address before: 100013 No. 5 Youth Road, Beijing, Chaoyang District Applicant before: Co., Ltd of coal science and technology academy |
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