CN2579906Y - Gas and air double preheating device of mixing burning furnace high temperature smoke and hot-blast furnace low temperature smoke - Google Patents
Gas and air double preheating device of mixing burning furnace high temperature smoke and hot-blast furnace low temperature smoke Download PDFInfo
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- CN2579906Y CN2579906Y CN 02280459 CN02280459U CN2579906Y CN 2579906 Y CN2579906 Y CN 2579906Y CN 02280459 CN02280459 CN 02280459 CN 02280459 U CN02280459 U CN 02280459U CN 2579906 Y CN2579906 Y CN 2579906Y
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Abstract
The utility model relates to a gas and air double preheating device of mixing high temperature smoke in a burning furnace and low temperature smoke in a hot blast furnace. The utility model comprises a gas preheater, an air preheater, a high temperature draught fan, a combustion furnace, etc. An exhaust pipeline at the outlet of a hot blast furnace is mixed with the smoke in the combustion furnace and then enters the gas preheater and the air preheater to preheat the gas and the air. The preheater is divided into a high temperature heat transfer section and a low temperature heat transfer section. A cylinder body of the high temperature section and the low temperature section is provided with an expansion joint. Cylinder body expansion is separated from tube bundle expansion. A high temperature section heat transfer tube bundle adopts alitizing inside and outside. The combustion furnace comprises a burning chamber and a mixing chamber. A china burner is arranged in the burning chamber. The combustion smoke in the mixing chamber is mixed with the exhaust gas in the hot blast furnace. The utility model has the benefits that the utility model adopts double preheating to enhance gas and air preheating temperature, has reasonable layout and convenient operation, solves the problems of material and expansion of the high temperature preheater and reduces the cost, and air flow distribution is even in the cylinder body without blind area under even pressure. The combustion furnace has compact and reasonable structure and even mixing.
Description
Technical field
The utility model relates to a kind of hotblast stove air gas and utilizes roasting kiln high-temperature flue gas and hotblast stove low-temperature flue gas blended double preheating device.
Background technology
Hotblast stove is the device that hot blast is provided to blast furnace, it is one of visual plant in the iron-making production, the heat that it supplies with blast-furnace hot-air accounts for 1/4th of ironmaking production heat dissipation, the blast furnace gas that consumes accounts for half of coal gas that blast furnace produces, improving hot blast temperature is to improve furnace processor, cut down the consumption of energy, improve iron quality and reduce one of effective measure of pig iron cost, utilize the waste-gas heat preheating of hotblast stove to enter the coal gas of hotblast stove, air, can reduce the hotblast stove energy expenditure, save energy, improve the hot air furnace hot air temperature, but, the exhaust gas of hot-blast stove temperature is about 300 ℃, can only be with coal gas, air themperature is preheating to about 180 ℃, hot blast temperature is improved 60～70 ℃, if hot blast temperature is brought up to more than 1200 ℃, coal gas, air themperature need be preheating to more than 300 ℃, at this moment only depend on heating by the exhaust gases not satisfy requirement, some ironmaking enterprise adopts waste gas and roasting kiln associating preheating at present, but because conventional interchanger coal gas, air preheating temperature does not reach more than 300 ℃, the hot air furnace hot air temperature limitation is about 1100 ℃, and it is very difficult that hot blast temperature is brought up to more than 1150～1200 ℃.Coal gas, air are reached such temperature, and the high temperature side temperature of interchanger reaches 400～600 ℃, and existing interchanger holds can't stand such temperature.
Summary of the invention
The purpose of this utility model provides a kind of roasting kiln high-temperature flue gas and hotblast stove low-temperature flue gas charge heating of utilizing, and preheating temperature reaches the two pre-heating heat-exchanging devices of coal gas, air more than 300 ℃.
The purpose of this utility model is achieved in that
A kind of roasting kiln high-temperature flue gas and hotblast stove low-temperature flue gas blended coal gas air double preheating device, it is characterized in that: comprise the gas preheating device, air preheater, high temperature draught fan, roasting kiln, gas line, air line, the exhaust gas of hot-blast stove pipeline, the gas mixture pipeline, hotblast stove outlet exhaust pipeline is connected to high temperature draught fan, the high temperature draught fan outlet conduit is connected to roasting kiln, cooled coal gas pipeline and cold-air duct are connected to roasting kiln, roasting kiln outlet gas mixture pipeline is connected to air preheater and gas preheating device inlet, is connected to chimney from air preheater and the outlet of gas preheating device; Cold-air duct is connected with the air preheater import, and hot-air duct is connected to hotblast stove air line inlet from the air preheater outlet, is provided with by-pass valve between air preheater import cold-air duct and the outlet hot-air duct; The cooled coal gas pipeline is connected with the import of gas preheating device, the heating gas pipeline is connected to hotblast stove gas line inlet from the outlet of gas preheating device, be provided with by-pass valve between gas preheating device import cooled coal gas pipeline and the outlet heating gas pipeline, roasting kiln, air preheater and gas preheating device are in barotropic state at the high temperature draught fan outlet side.
Above-mentioned roasting kiln high-temperature flue gas and hotblast stove low-temperature flue gas blended coal gas air double preheating device, it is characterized in that: air preheater and gas preheating device comprise the preheating gas inlet, the preheating gas outlet, exhaust gas entrance, waste gas outlet, high-temperature heat transfer section, the low-temperature heat exchange section, preheater cylindrical shell cross section is circular, high-temperature heat transfer section is connected by convergent divergent channel with the low-temperature heat exchange section, between high-temperature heat transfer section and low-temperature heat exchange section, also be provided with thrust-augmenting nozzle, the high-temperature heat transfer section heat-exchanging tube bundle adopts inside and outside aluminising, rest part adopts the refractory materials spraying, be provided with flow deflector at preheating gas inlet and exhaust gas entrance place, flow deflector adopts the refractory materials spraying, on high-temperature heat transfer section and low-temperature heat exchange section cylindrical shell, be provided with expansion joint, be provided with expansion joint at the exhaust gas entrance pipeline junction, point of fixity is arranged at the interchanger bottom, can be to top free expansion.
Above-mentioned roasting kiln high-temperature flue gas and hotblast stove low-temperature flue gas blended coal gas air double preheating device, it is characterized in that: roasting kiln is the cylinder that is rolled into by steel plate, the interior refractory materials of building comprises combustion chamber, mixing section, and the combustion chamber is in the bottom, mixing section is on top, ceramic burner is arranged in the combustion chamber, and there is annular flue outside, mixing section central section, and annular flue communicates with the exhaust gas inlet of hotblast stove, the top is a mixed gas outlet, is provided with 30～60 ° ejiction opening between circular channel and the central section.
Benefit of the present utility model is:
Adopt two preheatings, improve coal gas, air preheating temperature, rationally distributed, be convenient to operation, high-temperature preheater adopts high temperature section, low-temperature zone separately, cylindrical shell expands and tube bank is expanded separately, solve material, the expansion issues of high-temperature preheater, reduced cost, adopted the cylindrical drum air-flow to be evenly distributed, there is not the dead band, pressurized is even, avoids the cylindrical shell spalling, and volume reduces, roasting kiln adopts combustion chamber and mixing section integral type, compact construction is reasonable, mixes, and floor space is little, adopt high temperature draught fan, prolong work-ing life.
Description of drawings
Fig. 1 the utility model synoptic diagram
Fig. 2 preheater structural representation
Fig. 3 roasting kiln structural representation
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified:
As shown in Figure 1, a kind of roasting kiln high-temperature flue gas and hotblast stove low-temperature flue gas blended coal gas air double preheating device, comprise gas preheating device 16, air preheater 15, high temperature draught fan 17, roasting kiln 14, gas line 4, air line 3, exhaust gas of hot-blast stove pipeline 2, gas mixture pipeline 13, hotblast stove outlet exhaust pipeline 2 is connected to high temperature draught fan 17 inlets, high temperature draught fan 17 outlet conduits are connected to roasting kiln 14, cooled coal gas pipeline and cold-air duct also are connected to roasting kiln, coal gas and air mixed are in the roasting kiln internal combustion, the gas fume after burning temperature reaches more than 1100 ℃ mixes with 300 ℃ of left and right sides waste gas of temperature of hotblast stove 14, and the outlet mixture temperature reaches 500～600 ℃; Roasting kiln outlet gas mixture pipeline 13 is connected to air preheater 15 and gas preheating device 16, and cold-air duct 10 is connected with air preheater 15 imports, and cooled coal gas pipeline 7 is connected with 16 imports of gas preheating device.Temperature reaches 500～600 ℃ gas mixture to be brought up to the temperature of coal gas, air more than 300 ℃ in air preheater 15 and gas preheating device 16, and hot-air duct 9 is connected to hotblast stove 1 air line inlet from air preheater 15 outlets; Heating gas pipeline 5 is connected to hotblast stove 1 gas line inlet from 16 outlets of gas preheating device.Gas mixture comes out from air preheater 15 and gas preheating device 16, is connected to chimney 12 dischargings.
Between air preheater import cold-air duct 10 and outlet hot-air duct 9, be provided with by-pass valve 8, be provided with by-pass valve 6 between gas preheating device import cooled coal gas pipeline and the outlet heating gas pipeline, when not needing preheating, air preheater (14) and gas preheating device (6) terminal valve are closed, by-pass valve 8 and by-pass valve 6 are opened, roasting kiln 14, air preheater 15 and gas preheating device 16 are in barotropic state at high temperature draught fan 17 outlet sides.
As shown in Figure 2, air preheater and gas preheating device comprise preheating gas inlet 18, preheating gas outlet 27, exhaust gas entrance 26, waste gas outlet 21, high-temperature heat transfer section 22, low-temperature heat exchange section 25, preheater cylindrical shell cross section is circular, air-flow is evenly distributed, there is not the dead band, pressurized is even, avoid the cylindrical shell spalling, volume reduces, high-temperature heat transfer section 22 and low-temperature heat exchange section 25 are connected by convergent divergent channel, between high-temperature heat transfer section 22 and low-temperature heat exchange section 25, also be provided with thrust-augmenting nozzle 23, the high-temperature heat transfer section heat-exchanging tube bundle adopts inside and outside aluminising, improve withstand temp to 600～700 ℃, rest part adopts the refractory materials spraying, be provided with flow deflector 28 at preheating gas inlet and exhaust gas entrance place, 29, the directing air flow direction, flow deflector adopts the refractory materials spraying, because it is inequality that the expansion of tube bank and cylindrical shell expand, so, on high-temperature heat transfer section and low-temperature heat exchange section cylindrical shell, be provided with expansion joint 20,24, be provided with expansion joint 19 at the exhaust gas entrance pipeline junction, cylindrical shell expands and tube bank is expanded separately, solved the expansion issues of high-temperature preheater, point of fixity is arranged at the interchanger bottom, can be to top free expansion.Preheater can adopt vertical or horizontal according to the site environment needs.
As shown in Figure 3, roasting kiln is the cylinder that is rolled into by steel plate, the interior refractory materials of building, comprise the combustion chamber, mixing section, the combustion chamber is in the bottom, mixing section is on top, the combustion chamber is provided with ceramic burner 35, the gas fume after burning temperature enters mixing section central section 34 more than 1100 ℃, there is annular flue 32 outside, central section, the annular flue communicates with the exhaust gas inlet 33 of hotblast stove, the top is a mixed gas outlet 30, and 300 ℃ of left and right sides waste gas of the temperature that hotblast stove comes out enter annular flue 32 from exhaust gas inlet 33, is provided with 30～60 ° ejiction opening 31 between annular flue 32 and the central section 34, the waste gas of hotblast stove sprays into the central section from ejiction opening 31 to be mixed with the roasting kiln flue gas, mixes the back temperature and reaches 500～600 ℃.
Claims (3)
1. roasting kiln high-temperature flue gas and hotblast stove low-temperature flue gas blended coal gas air double preheating device, it is characterized in that: comprise the gas preheating device, air preheater, high temperature draught fan, roasting kiln, gas line, air line, the exhaust gas of hot-blast stove pipeline, the gas mixture pipeline, hotblast stove outlet exhaust pipeline is connected to high temperature draught fan, the high temperature draught fan outlet conduit is connected to roasting kiln, cooled coal gas pipeline and cold-air duct are connected to roasting kiln, roasting kiln outlet gas mixture pipeline is connected to air preheater and gas preheating device inlet, is connected to chimney from air preheater and the outlet of gas preheating device; Cold-air duct is connected with the air preheater import, and hot-air duct is connected to hotblast stove air line inlet from the air preheater outlet, is provided with by-pass valve between air preheater import cold-air duct and the outlet hot-air duct; The cooled coal gas pipeline is connected with the import of gas preheating device, the heating gas pipeline is connected to hotblast stove gas line inlet from the outlet of gas preheating device, be provided with by-pass valve between gas preheating device import cooled coal gas pipeline and the outlet heating gas pipeline, roasting kiln, air preheater and gas preheating device are in barotropic state at the high temperature draught fan outlet side.
2. roasting kiln high-temperature flue gas according to claim 1 and hotblast stove low-temperature flue gas blended coal gas air double preheating device, it is characterized in that: air preheater and gas preheating device comprise the preheating gas inlet, the preheating gas outlet, exhaust gas entrance, waste gas outlet, high-temperature heat transfer section, the low-temperature heat exchange section, preheater cylindrical shell cross section is circular, high-temperature heat transfer section is connected by convergent divergent channel with the low-temperature heat exchange section, between high-temperature heat transfer section and low-temperature heat exchange section, also be provided with thrust-augmenting nozzle, the high-temperature heat transfer section heat-exchanging tube bundle adopts inside and outside aluminising, rest part adopts the refractory materials spraying, be provided with flow deflector at preheating gas inlet and exhaust gas entrance place, flow deflector adopts the refractory materials spraying, on high-temperature heat transfer section and low-temperature heat exchange section cylindrical shell, be provided with expansion joint, be provided with expansion joint at the exhaust gas entrance pipeline junction, point of fixity is arranged at the interchanger bottom, can be to top free expansion.
3. roasting kiln high-temperature flue gas according to claim 1 and hotblast stove low-temperature flue gas blended coal gas air double preheating device, it is characterized in that: roasting kiln is the cylinder that is rolled into by steel plate, the interior refractory materials of building, comprise combustion chamber, mixing section, the combustion chamber is in the bottom, mixing section is on top, ceramic burner is arranged in the combustion chamber, there is annular flue outside, mixing section central section, the annular flue communicates with the exhaust gas inlet of hotblast stove, the top is a mixed gas outlet, is provided with 30～60 ° ejiction opening between circular channel and the central section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02280459 CN2579906Y (en) | 2002-10-10 | 2002-10-10 | Gas and air double preheating device of mixing burning furnace high temperature smoke and hot-blast furnace low temperature smoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02280459 CN2579906Y (en) | 2002-10-10 | 2002-10-10 | Gas and air double preheating device of mixing burning furnace high temperature smoke and hot-blast furnace low temperature smoke |
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| Publication Number | Publication Date |
|---|---|
| CN2579906Y true CN2579906Y (en) | 2003-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02280459 Expired - Fee Related CN2579906Y (en) | 2002-10-10 | 2002-10-10 | Gas and air double preheating device of mixing burning furnace high temperature smoke and hot-blast furnace low temperature smoke |
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| CN (1) | CN2579906Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634529B (en) * | 2008-07-25 | 2012-09-05 | 上海雷林工程技术有限公司 | Preheating system of plate heat exchanger of hot blast furnace |
| CN102732700A (en) * | 2012-06-20 | 2012-10-17 | 无锡宇吉科技有限公司 | Air pipeline apparatus connected to combustion nozzle |
| CN109028569A (en) * | 2018-09-09 | 2018-12-18 | 无锡博众热能环保设备有限公司 | A kind of flue gas complete alternation hot-blast stove |
| CN111118245A (en) * | 2020-02-05 | 2020-05-08 | 北京首钢国际工程技术有限公司 | High-temperature preheating system and method for hot blast stove |
| CN115491452A (en) * | 2022-08-30 | 2022-12-20 | 鞍钢股份有限公司 | Production method for reducing emission concentration of nitrogen oxides in flue gas of blast furnace hot blast stove |
-
2002
- 2002-10-10 CN CN 02280459 patent/CN2579906Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634529B (en) * | 2008-07-25 | 2012-09-05 | 上海雷林工程技术有限公司 | Preheating system of plate heat exchanger of hot blast furnace |
| CN102732700A (en) * | 2012-06-20 | 2012-10-17 | 无锡宇吉科技有限公司 | Air pipeline apparatus connected to combustion nozzle |
| CN109028569A (en) * | 2018-09-09 | 2018-12-18 | 无锡博众热能环保设备有限公司 | A kind of flue gas complete alternation hot-blast stove |
| CN109028569B (en) * | 2018-09-09 | 2024-01-05 | 无锡博众热能环保设备有限公司 | Flue gas full-cycle hot-blast stove |
| CN111118245A (en) * | 2020-02-05 | 2020-05-08 | 北京首钢国际工程技术有限公司 | High-temperature preheating system and method for hot blast stove |
| CN111118245B (en) * | 2020-02-05 | 2023-11-03 | 北京首钢国际工程技术有限公司 | High-temperature preheating system and method for hot blast stove |
| CN115491452A (en) * | 2022-08-30 | 2022-12-20 | 鞍钢股份有限公司 | Production method for reducing emission concentration of nitrogen oxides in flue gas of blast furnace hot blast stove |
| CN115491452B (en) * | 2022-08-30 | 2023-09-26 | 鞍钢股份有限公司 | Production method for reducing emission concentration of nitrogen oxides in flue gas of blast furnace hot blast stove |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |