CN103968357A - Ammonium hydroxide waste heat boiler and process for recycling sintering flue gas - Google Patents
Ammonium hydroxide waste heat boiler and process for recycling sintering flue gas Download PDFInfo
- Publication number
- CN103968357A CN103968357A CN201410208531.XA CN201410208531A CN103968357A CN 103968357 A CN103968357 A CN 103968357A CN 201410208531 A CN201410208531 A CN 201410208531A CN 103968357 A CN103968357 A CN 103968357A
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- Prior art keywords
- flue gas
- boiler
- superheater
- economizer
- waste heat
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound 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[O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 239000003546 flue gas Substances 0.000 title claims abstract description 38
- 239000002918 waste heat Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005245 sintering Methods 0.000 title claims abstract description 9
- VHUUQVKOLVNVRT-UHFFFAOYSA-N ammonium hydroxide Chemical compound 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[NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 title abstract description 6
- 238000004064 recycling Methods 0.000 title abstract description 4
- 239000000908 ammonium hydroxide Substances 0.000 title abstract 4
- 239000007788 liquid Substances 0.000 claims description 32
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 27
- 239000012530 fluid Substances 0.000 claims description 23
- 239000003517 fume Substances 0.000 claims description 20
- 239000000779 smoke Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 239000011555 saturated liquid Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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[C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 2
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Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
The invention provides an ammonium hydroxide waste heat boiler and process for recycling sintering flue gas. The ammonium hydroxide waste heat boiler and process for recycling sintering flue gas involve a boiler body. A horizontal high-temperature flue gas inlet gas flue is arranged on the top of the boiler body. A horizontal medium-temperature flue gas inlet gas flue is arranged in the middle of the boiler body. A horizontal outlet gas flue is arranged at the bottom of the boiler body. The outlet gas flue is externally connected with a chimney. A superheater, an evaporator and a coal economizer are sequentially arranged inside the boiler body from top to bottom. The inlet and the outlet of the superheater, the inlet and the outlet of the evaporator and the inlet and the outlet of the coal economizer are sequentially connected through pipelines. Ammonium hydroxide is used as a working medium, and in the field of low-temperature flue gas, efficiency higher than that of a conventional boiler can be achieved. Waste heat of sintering flue gas is recycled, resources are saved, and the environment friendliness is achieved.
Description
Technical field
The invention belongs to the technical field of recycling sinter fume, relate in particular to a kind of ammoniacal liquor waste heat boiler and technique that reclaims sinter fume.
Background technology
In iron and steel enterprise's production procedure, sintering circuit is that iron and steel enterprise produces the big power consumer in circulation, and energy consumption is only second to Iron-smelting.And in sintering circuit, have nearly 50% energy consumption to enter atmosphere with the form of sintering device flue gas and cooling machine waste gas, cause the waste of the energy.Because sinter fume temperature is not high, conventional residual neat recovering system efficiency is not high, causes the energy of this part effectively not reclaim.Because sinter fume amount is larger, utilize efficient waste heat recovery generating system can reduce the production cost of iron and steel enterprise, bring economic benefit, have broad prospects.
The boiler of conventional recovery sinter fume is taking water as working medium, and for the temperature of sinter fume, efficiency is lower, causes whole waste heat recovery generating system economy not high.Taking ammoniacal liquor as being subject to the heat transfer process of hot working fluid due to its unfixing solidifying boiling point, can be preferably in heat transfer process and residual heat resources match, and the waste heat boiler of employing taking ammoniacal liquor as working medium, in low-temperature flue gas field, can reach the efficiency higher than conventional boiler, aspect recovery sinter fume, there is wide market.
Summary of the invention
Technical problem to be solved by this invention is the problem for above-mentioned existence, a kind of ammoniacal liquor waste heat boiler and technique that reclaims sinter fume is provided, this boiler is taking ammoniacal liquor as heat absorption working medium, sinter fume is thermal source, ammonia-water mixture produces certain density ammonia steam after absorption heat, is sent to acting generating in ammoniacal liquor turbine.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of ammoniacal liquor waste heat boiler that reclaims sinter fume, comprise fluid reservoir, feed pump, economizer, evaporimeter, superheater, boiler body is forced circulation vertical boiler, boiler body inside sets gradually superheater from top to bottom, evaporimeter, economizer, described superheater, the import and export of evaporimeter and economizer are connected successively by pipeline, superheater, the import and export of evaporimeter and economizer are equipped with header, it is characterized in that, described boiler body top arranges horizontal high-temperature flue gas entry flue, boiler body middle part arranges warm smoke inlet flue in level, boiler body bottom arranges Horizontal Exit flue, the external chimney of exhaust pass, described economizer import is connected with feed pump outlet by feedwater piping, and feed pump import is connected with fluid reservoir, in described fluid reservoir, store ammoniacal liquor mixed working fluid.
Press such scheme, also comprise a vapour liquid separator, described gas-liquid separator is connected with evaporator outlet header by pipeline, and gas-liquid separator bottom is connected with fluid reservoir top by pipeline.
Press such scheme, described economizer exit is connected with evaporator, and evaporator outlet is connected with vapour liquid separator import by the inlet pipeline that is arranged at vapour liquid separator side, and the outlet conduit at vapour liquid separator top is connected with superheater import.
Press such scheme, on described economizer outer wall, be furnished with fin.
A kind of technique of the ammoniacal liquor waste heat boiler that reclaims sinter fume, high, intermediate sintering temperature flue gas enters boiler body by warm smoke inlet air flue horizontal in described boiler body top high-temperature flue gas entry flue and middle part respectively, turning over 90 ° at flue outlet place flows downward, first high-temperature flue gas passes to heat horizontal superheater, then mix with middle temperature flue gas, then flow through successively evaporimeter, economizer, temperature is down to 130 DEG C of left and right, flue gas turns over 90 °, and along continuous straight runs enters subsequent processing from exhaust pass; The liquid ammoniacal liquor of fluid reservoir pressurizes and delivers to the heat that absorbs flue gas in economizer through feed pump, become saturated liquid, after mixing, header delivers to evaporimeter, after being heated, become saturated vapor in evaporimeter, deliver to and in gas-liquid separator, remove the drop being mingled with, through header, deliver to superheater, in superheater, delivered to subsequent processing by after overheated; The liquid of separating in gas-liquid separator is delivered in fluid reservoir, again participates in circulation.
The invention has the beneficial effects as follows: 1, a kind of ammoniacal liquor waste heat boiler that reclaims sinter fume is provided, recycles sinter fume, economize on resources, protection of the environment; 2, on economizer outer wall, be furnished with fin, with enhanced heat exchange, reduce boiler size; 3,, taking ammoniacal liquor as working medium, in low-temperature flue gas field, can reach the efficiency higher than conventional boiler.
Brief description of the drawings
Fig. 1 is the structural representation of one embodiment of the invention.
Wherein: 1. economizer, 2. evaporimeter, 3. superheater, 4. superheater outlet conduit, 5. vapour liquid separator, 6. vapour liquid separator inlet pipeline, 7. vapour liquid separator outlet conduit, 8. fluid reservoir, 9. feed pump, 10. feedwater piping, 11. headers, 12. high-temperature flue gas entry flues, warm smoke inlet flue in 13., 14. exhaust pass, 15. boiler bodies.
Detailed description of the invention
For understanding better the present invention, below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, a kind of ammoniacal liquor waste heat boiler and technique that reclaims sinter fume, comprise fluid reservoir 8, feed pump 9, economizer 1, evaporimeter 2, superheater 3, boiler body 15, boiler body is forced circulation vertical boiler, boiler body top arranges horizontal high-temperature flue gas entry flue 12, boiler body middle part arranges warm smoke inlet flue 13 in level, boiler body bottom arranges Horizontal Exit flue 14, the external chimney of exhaust pass, boiler body inside sets gradually superheater from top to bottom, evaporimeter, economizer, economizer exit is connected with evaporator, evaporator outlet is connected with vapour liquid separator 5 imports by the inlet pipeline 6 that is arranged at vapour liquid separator 5 sides, the outlet conduit 7 at vapour liquid separator top is connected with superheater import, import and export are equipped with header 11, to be heated evenly in guarantee pipe, economizer import is connected with feed pump outlet by feedwater piping 10, feed pump import is connected with fluid reservoir, on economizer outer wall, be furnished with fin, with enhanced heat exchange, reduce boiler size, superheater outlet is delivered to subsequent processing by header by overheated ammonia vapor, gas-liquid separator is connected with evaporator outlet header by pipeline, gas-liquid separator bottom is connected with fluid reservoir top by pipeline, in fluid reservoir, store ammoniacal liquor mixed working fluid.
The flue gas of two bursts of different temperatures enters boiler from different entrances respectively.The flue gas of high temperature section enters from upper boiler, carries out heat exchange with superheat section working medium; The flue gas of middle-temperature section enters from boiler middle part, mixes with the high-temperature flue gas after heat exchange, flows to bottom, carries out heat exchange with ammonia-water mixture, taking ammoniacal liquor as working medium, in low-temperature flue gas field, can reach the efficiency higher than conventional boiler.
When the work of ammoniacal liquor waste heat boiler, from height out of technological process, warm flue gas, exhaust gases passes warm smoke inlet air flue horizontal from upper boiler high-temperature flue gas entry flue and middle part by liner brick wall enters boiler, turning over 90 ° at gas approach exit flue gas flows downward, first high-temperature flue gas passes to heat horizontal superheater, then mix with middle temperature flue gas, then flow through successively evaporimeter, economizer, temperature is down to 130 DEG C of left and right, flue gas turns over 90 °, and along continuous straight runs enters subsequent processing from exhaust pass.
Liquid ammoniacal liquor from fluid reservoir pressurizes and delivers to the heat that absorbs flue gas in economizer through feed pump, become saturated liquid, after mixing, header delivers to evaporimeter, after being heated, become saturated vapor in evaporimeter, deliver in gas-liquid separator, in separator, remove the drop being mingled with, through header, deliver to superheater, in superheater, delivered to subsequent processing by after overheated.The liquid of separating in gas-liquid separator is delivered in fluid reservoir, again participates in circulation.
Claims (5)
1. one kind is reclaimed the ammoniacal liquor waste heat boiler of sinter fume, comprise fluid reservoir, feed pump, economizer, evaporimeter, superheater, boiler body is forced circulation vertical boiler, boiler body inside sets gradually superheater from top to bottom, evaporimeter, economizer, described superheater, the import and export of evaporimeter and economizer are connected successively by pipeline, superheater, the import and export of evaporimeter and economizer are equipped with header, it is characterized in that, described boiler body top arranges horizontal high-temperature flue gas entry flue, boiler body middle part arranges warm smoke inlet flue in level, boiler body bottom arranges Horizontal Exit flue, the external chimney of exhaust pass, described economizer import is connected with feed pump outlet by feedwater piping, and feed pump import is connected with fluid reservoir, in described fluid reservoir, store ammoniacal liquor mixed working fluid.
2. a kind of ammoniacal liquor waste heat boiler that reclaims sinter fume according to claim 1, it is characterized in that, also comprise a vapour liquid separator, described gas-liquid separator is connected with evaporator outlet header by pipeline, and gas-liquid separator bottom is connected with fluid reservoir top by pipeline.
3. a kind of ammoniacal liquor waste heat boiler that reclaims sinter fume according to claim 2, it is characterized in that, described economizer exit is connected with evaporator, evaporator outlet is connected with vapour liquid separator import by the inlet pipeline that is arranged at vapour liquid separator side, and the outlet conduit at vapour liquid separator top is connected with superheater import.
4. a kind of ammoniacal liquor waste heat boiler that reclaims sinter fume according to claim 3, is characterized in that, on described economizer outer wall, is furnished with fin.
5. adopt the technique of one of the claims described a kind of ammoniacal liquor waste heat boiler that reclaims sinter fume, it is characterized in that: height, intermediate sintering temperature flue gas enters boiler body by warm smoke inlet air flue horizontal in described boiler body top high-temperature flue gas entry flue and middle part respectively, turning over 90 ° at flue outlet place flows downward, first high-temperature flue gas passes to heat horizontal superheater, then mix with middle temperature flue gas, then the evaporimeter of flowing through successively, economizer, temperature is down to 130 DEG C of left and right, flue gas turns over 90 °, along continuous straight runs enters subsequent processing from exhaust pass, the liquid ammoniacal liquor of fluid reservoir pressurizes and delivers to the heat that absorbs flue gas in economizer through feed pump, become saturated liquid, after mixing, header delivers to evaporimeter, after being heated, become saturated vapor in evaporimeter, deliver to and in gas-liquid separator, remove the drop being mingled with, through header, deliver to superheater, in superheater, delivered to subsequent processing by after overheated, the liquid of separating in gas-liquid separator is delivered in fluid reservoir, again participates in circulation.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09126665A (en) * | 1995-10-31 | 1997-05-16 | Kawasaki Steel Corp | Recovering method of waste heat of steel heating furnace and facility therefor |
| CN102287800A (en) * | 2011-06-10 | 2011-12-21 | 邢同春 | System for producing steam by utilizing coke oven to heat waste gas and waste heat |
| CN202220628U (en) * | 2011-09-13 | 2012-05-16 | 上海盛合新能源科技有限公司 | Combined cycle power generation system for increasing use efficiency of heat source |
| CN103629682A (en) * | 2013-11-13 | 2014-03-12 | 江苏和顺环保股份有限公司 | Boiler waste heat utilization system |
| CN203927865U (en) * | 2014-05-16 | 2014-11-05 | 中冶南方工程技术有限公司 | A kind of ammoniacal liquor waste heat boiler that reclaims sinter fume |
-
2014
- 2014-05-16 CN CN201410208531.XA patent/CN103968357B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09126665A (en) * | 1995-10-31 | 1997-05-16 | Kawasaki Steel Corp | Recovering method of waste heat of steel heating furnace and facility therefor |
| CN102287800A (en) * | 2011-06-10 | 2011-12-21 | 邢同春 | System for producing steam by utilizing coke oven to heat waste gas and waste heat |
| CN202220628U (en) * | 2011-09-13 | 2012-05-16 | 上海盛合新能源科技有限公司 | Combined cycle power generation system for increasing use efficiency of heat source |
| CN103629682A (en) * | 2013-11-13 | 2014-03-12 | 江苏和顺环保股份有限公司 | Boiler waste heat utilization system |
| CN203927865U (en) * | 2014-05-16 | 2014-11-05 | 中冶南方工程技术有限公司 | A kind of ammoniacal liquor waste heat boiler that reclaims sinter fume |
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| CN103968357B (en) | 2016-03-30 |
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