CN2055137U - Coal-burning hot-blast stove with flue gas partial recirculation - Google Patents
Coal-burning hot-blast stove with flue gas partial recirculation Download PDFInfo
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- CN2055137U CN2055137U CN 89202099 CN89202099U CN2055137U CN 2055137 U CN2055137 U CN 2055137U CN 89202099 CN89202099 CN 89202099 CN 89202099 U CN89202099 U CN 89202099U CN 2055137 U CN2055137 U CN 2055137U
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- Prior art keywords
- temperature
- flue
- heat
- flue gas
- transfer
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound 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[O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title description 15
- 239000003546 flue gases Substances 0.000 title description 13
- 239000003570 air Substances 0.000 claims description 2
- 238000002485 combustion reactions Methods 0.000 claims description 2
- 239000000463 materials Substances 0.000 abstract description 9
- 238000010438 heat treatment Methods 0.000 description 5
- 239000011819 refractory materials Substances 0.000 description 5
- 239000007769 metal materials Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000007789 gases Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011514 iron Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000007921 sprays Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910003726 AI2O3 Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixtures Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000003134 recirculating Effects 0.000 description 1
- 230000001105 regulatory Effects 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000011901 water Substances 0.000 description 1
Abstract
Description
The utility model is the utility model about the Coalhotairfurnace of partition heat exchange.Hotblast stove is gas heating stove just, for example air-heating furnace.In Coalhotairfurnace, the temperature of flue gas can reach Celsius 1,000 hundreds of degree, and the coefficient of heat transfer of the coefficient of heat transfer of hot blast side and fume side is more or less the same, so the temperature of high-temperature zone heat exchange surface is very high, to such an extent as to the ordinary steel iron material is difficult to bear.Existing solution is to adopt the high temperature heat-transfer surface of heating resisting metal material as hotblast stove, and this raises the cost of hotblast stove greatly.In addition, this method still can be subjected to the restriction of the thermal stability of heating resisting metal material under certain conditions.Existing another kind of solution is to adopt the high temperature heat-transfer surface of the higher refractory materials of thermal conductivity as hotblast stove, for example high alumina refractory, carborundum refractory etc.Because the refractoriness of these refractory materialss is very high, so can not be subjected to the restriction of refractoriness.But because refractory materials intensity is low, do not have the workability of metallic substance, so this heat-transfer surface manufacturing, structure are all very complicated, stopping property is also relatively poor, also is easy in addition burst.Also having a kind of solution in addition is to strengthen the incendiary coefficient of excess air, and the temperature of flue gas is reduced, thereby reduces the temperature of high temperature heat-transfer surface, makes it to remain in the safety temperature scope of heat-transfer surface material.The shortcoming of this method is to have increased exhaust smoke level when reducing flue-gas temperature, has reduced the thermo-efficiency of hotblast stove, has wasted the energy.The method of reduction flue-gas temperature such as water spray, spray vapour in flue gas also has with the identical shortcoming of this method more for another example, has wasted the energy.
It is constant that task of the present utility model provides a kind of thermo-efficiency that can either keep, and can regulate the temperature of high temperature heat-transfer surface again neatly, makes it to remain on the interior hotblast stove of safety temperature scope of fixed heat-transfer surface material.
Accompanying drawing 1 is the Coalhotairfurnace with flue gas recirculation part.High-temperature flue 1 before exit flue 4 after this hotblast stove has a pipeline 5 with hotblast stove induced draft fan 3 and the heat exchanger of hotblast stove 2 is communicated with, under the effect of induced draft fan, the low-temperature flue gas of having discharged heat exchanger partly, again flow back in the flue before the heat exchanger by this pipeline, and with the there high-temperature flue gas mix, the flue-gas temperature that enters in the heat exchanger is reduced, thereby reduced the temperature of heat-transfer surface.
This connecting pipe is equipped with a variable valve 6, by this variable valve, can change the exhaust gas volumn of recirculation, thereby changes the flue-gas temperature that enters in the interchanger, and the temperature of finally regulating heat-transfer surface makes it to remain in the safety temperature scope of heat-transfer surface material.Because the final clean exhaust smoke level of hotblast stove does not change, so the thermo-efficiency of hotblast stove does not also change.In the accompanying drawing 1 is flue before the interchanger, the 2nd, and interchanger, the 3rd, induced draft fan, the 4th, exit flue, the 5th, recirculating gas duct, the 6th, variable valve, the 7th, combustion chamber, the 8th, chimney.
The utility model also has certain shortcoming, and Here it is owing to reduced the temperature that enters the flue gas in the heat exchanger, thereby also reduced heat transfer temperature difference, thereby must increase heat interchanging area, and the material that heat-transfer surface is consumed increases.But, exceed under the not very big situation of the safety temperature of heat-transfer surface material in the temperature of high temperature heat-transfer surface, by the method for this partial fume recirculation, allow an amount of flue gas carry out recirculation and reduce the temperature of heat-transfer surface, be a kind of economy, simple and effective method.In addition, in many cases, by the recirculation of flue gas part, can use the heating resisting metal material, even can use the heat-transfer surface of ordinary steel iron material as hotblast stove, although this will increase heat interchanging area, the material that the hotblast stove heat-transfer surface is consumed increases, but, the cost of hotblast stove is reduced significantly because price is much lower.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89202099 CN2055137U (en) | 1989-02-28 | 1989-02-28 | Coal-burning hot-blast stove with flue gas partial recirculation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89202099 CN2055137U (en) | 1989-02-28 | 1989-02-28 | Coal-burning hot-blast stove with flue gas partial recirculation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2055137U true CN2055137U (en) | 1990-03-28 |
Family
ID=4859893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89202099 CN2055137U (en) | 1989-02-28 | 1989-02-28 | Coal-burning hot-blast stove with flue gas partial recirculation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2055137U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088178A (en) * | 2013-03-04 | 2013-05-08 | 江苏沙钢集团有限公司 | Blast furnace hot-blast stove flue gas self-circulation combustion method and system |
| CN109028985A (en) * | 2018-07-13 | 2018-12-18 | 哈尔滨锅炉厂有限责任公司 | Large-scale storage tank high-temperature gas recycles pre-heating system and circulation pre-heating mean |
-
1989
- 1989-02-28 CN CN 89202099 patent/CN2055137U/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088178A (en) * | 2013-03-04 | 2013-05-08 | 江苏沙钢集团有限公司 | Blast furnace hot-blast stove flue gas self-circulation combustion method and system |
| CN103088178B (en) * | 2013-03-04 | 2014-09-10 | 江苏沙钢集团有限公司 | Blast furnace hot-blast stove flue gas self-circulation combustion method and system |
| CN109028985A (en) * | 2018-07-13 | 2018-12-18 | 哈尔滨锅炉厂有限责任公司 | Large-scale storage tank high-temperature gas recycles pre-heating system and circulation pre-heating mean |
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