CN109082492A - A kind of heat exchanger purge system and method using hot-blast stove release exhaust gas - Google Patents
A kind of heat exchanger purge system and method using hot-blast stove release exhaust gas Download PDFInfo
- Publication number
- CN109082492A CN109082492A CN201811013361.4A CN201811013361A CN109082492A CN 109082492 A CN109082492 A CN 109082492A CN 201811013361 A CN201811013361 A CN 201811013361A CN 109082492 A CN109082492 A CN 109082492A
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- China
- Prior art keywords
- heat exchanger
- hot
- blast stove
- exhaust gas
- flue
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/10—Other details, e.g. blast mains
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a kind of heat exchanger purge systems and method using hot-blast stove release exhaust gas, the system includes the flue of air-supply furnace, heat exchanger and the connection air-supply furnace and heat exchanger, flue gas stop valve is installed on the flue, exhaust emission pipe is installed between flue gas stop valve and hot-blast stove on the flue, exhaust gas stop valve is installed, the exhaust emission pipe is connect with heat exchanger on the exhaust emission pipe.The present invention introduces heat exchanger for hot-blast stove by pipeline before on air turning main combustion period, by high pressure exhaust gas in furnace, carries out purging deashing inside heat exchanging device.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, and in particular to a kind of heat exchanger purging using hot-blast stove release exhaust gas
System and method.
Background technique
At present in blast furnace ironmaking workshop, important heating plant of the hot-blast stove as blast furnace on air needs week with main combustion period
Phase property is alternately.When from air being converted to burner, needed before conversion by high pressure exhaust gas in hot-blast stove furnace to hot-blast stove
Chimney release.Exhaust gas pressure is high in furnace, and generally in 0.2MP ~ 0.5MPa, stream pressure high flow rate is fast, and directly release leads to the gas
Physical efficiency amount wastes, and direct emission can also generate noise pollution.In addition, the heat exchange of hot-blast stove fume afterheat utilizing system
Device equipment easy dust stratification when using needs the gas purging deashing operation periodically using 0.2MPa or more, needs to consume additional height
Press energy medium.
To sum up, have the following problems in hot-blast stove production process at present: high pressure exhaust gas is put in one side hot-blast stove furnace
It dissipates, leads to medium energy dissipation, another aspect heat exchanger for hot-blast stove needs high-pressure blowing gas, increases medium energy consumption.
Summary of the invention
The purpose of the present invention is to provide it is a kind of using hot-blast stove release exhaust gas heat exchanger purge system and method, it
Before hot-blast stove on air turns main combustion period, high pressure exhaust gas leads to heat exchanger in furnace when will change furnace, purges deashing gas as heat exchanger,
Turn waste into wealth, has the advantages that energy-saving, energy medium recycles.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of heat exchanger purge system using hot-blast stove release exhaust gas, including air-supply furnace, heat exchanger and the connection air-supply
The flue of furnace and heat exchanger is equipped with flue gas stop valve on the flue, cuts on the flue positioned at flue gas
Exhaust emission pipe is installed between disconnected valve and hot-blast stove, exhaust gas stop valve is installed on the exhaust emission pipe, it is described useless
Gas discharge tube is connect with heat exchanger.
According to the above technical scheme, the exhaust emission pipe includes high pressure resistant medium delivery pipe road.
Correspondingly, the present invention also provides a kind of heat exchanger blowing method using hot-blast stove release exhaust gas, this method is used
It is above-mentioned using hot-blast stove release exhaust gas heat exchanger purge system, comprising the following steps: hot-blast stove before on air turning main combustion period,
Flue gas stop valve is closed, exhaust gas stop valve is opened, high pressure exhaust gas introduces heat exchanger through exhaust emission pipe in hot-blast stove furnace, exchanges
Purging deashing is carried out inside hot device.
The beneficial effect comprise that: the high pressure release exhaust gas in hot-blast stove is passed through exhaust emission pipe by the present invention
Introduce heat exchanger turns waste into wealth as heat exchanger deashing gas, has the advantages that energy-saving, energy medium recycles；And
And the present invention can cancel the external blowing medium of heat exchanger for hot-blast stove, reduce energy consumption, save production cost and plant maintenance
Expense；In addition, having effects that muffler due to heat exchanger inner fins distributed in grid, hot-blast stove height can be substantially reduced
Noise pollution caused by waste gas spreading is pressed, environment protecting is good.It is periodically alternately since hot-blast stove on air turns main combustion period
, therefore, after the present invention, the high pressure exhaust gas heat exchanging device discharged in hot-blast stove furnace is also to be periodically purged with, and can be reached
Periodically remove the effect of dust stratification inside heat exchanger.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
In figure: 1- air-supply furnace, 2- heat exchanger, 3- flue, 4- exhaust emission pipe, 5- exhaust gas stop valve, 6- flue gas
Stop valve.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
As shown in Figure 1, a kind of heat exchanger purge system using hot-blast stove release exhaust gas, including air-supply furnace 1, heat exchanger 2
And the flue 3 of connection air-supply furnace 1 and heat exchanger 2, flue gas stop valve 6 is installed, on flue 3 on flue 3
Exhaust emission pipe 4 is installed between flue gas stop valve 6 and hot-blast stove 1, exhaust gas cutting is installed on exhaust emission pipe 4
Valve 5, exhaust emission pipe 4 are connect with heat exchanger 2.
In a preferred embodiment of the invention, exhaust emission pipe includes high pressure resistant medium delivery pipe road.
Correspondingly, the present invention also provides a kind of heat exchanger blowing methods using hot-blast stove release exhaust gas, as shown in Figure 1,
This method is using the above-mentioned heat exchanger purge system using hot-blast stove release exhaust gas, comprising the following steps: hot-blast stove 1 is on air
Before turning main combustion period, flue gas stop valve 6 is closed, opens exhaust gas stop valve 5, high pressure exhaust gas is through exhaust emission pipe 4 in 1 furnace of hot-blast stove
Heat exchanger 2 is introduced, carries out purging deashing inside heat exchanging device 2.
Hot-blast stove is during on air, as shown in Figure 1, closing exhaust gas stop valve 5, opens flue gas stop valve 6, inner flue gas of the stove
Sent out through flue, before on air turning main combustion period, hot-blast stove furnace pressure is high, generally in 0.2MP ~ 0.5MPa, need by
High pressure exhaust gas is diffused in furnace, to reduce furnace pressure, at this point, closing flue gas stop valve 6, opens exhaust gas stop valve 5, will
High pressure exhaust gas introduces heat exchanger for hot-blast stove through exhaust emission pipe in hot-blast stove furnace, and high pressure exhaust gas is as in power source heat exchanging device
Portion carries out purging deashing, and final dust enters chimney with exhaust gas.
Present invention design is simple, had both been suitable for hot blast stove system new construction, also hot-blast stove can be transformed online,
The high pressure exhaust gas of multiple hot-blast stoves can also be introduced in heat exchanger simultaneously.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (3)
1. it is a kind of using hot-blast stove release exhaust gas heat exchanger purge system, which is characterized in that including air-supply furnace, heat exchanger and
The flue of the air-supply furnace and heat exchanger is connected, flue gas stop valve, the flue are installed on the flue
It is upper that exhaust emission pipe is installed between flue gas stop valve and hot-blast stove, exhaust gas is installed on the exhaust emission pipe and is cut
Disconnected valve, the exhaust emission pipe are connect with heat exchanger.
2. the heat exchanger purge system according to claim 1 using hot-blast stove release exhaust gas, which is characterized in that described useless
Gas discharge tube includes high pressure resistant medium delivery pipe road.
3. a kind of heat exchanger blowing method using hot-blast stove release exhaust gas, which is characterized in that this method uses claim 1-2
Any one of described in using hot-blast stove release exhaust gas heat exchanger purge system, comprising the following steps: hot-blast stove is on air
Before turning main combustion period, flue gas stop valve is closed, opens exhaust gas stop valve, high pressure exhaust gas is introduced through exhaust emission pipe in hot-blast stove furnace
Heat exchanger carries out purging deashing inside heat exchanging device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811013361.4A CN109082492B (en) | 2018-08-31 | 2018-08-31 | Heat exchanger purging system and method for diffusing waste gas by using hot blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811013361.4A CN109082492B (en) | 2018-08-31 | 2018-08-31 | Heat exchanger purging system and method for diffusing waste gas by using hot blast stove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109082492A true CN109082492A (en) | 2018-12-25 |
| CN109082492B CN109082492B (en) | 2020-08-07 |
Family
ID=64840345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811013361.4A Active CN109082492B (en) | 2018-08-31 | 2018-08-31 | Heat exchanger purging system and method for diffusing waste gas by using hot blast stove |
Country Status (1)
| Country | Link |
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| CN (1) | CN109082492B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080659A (en) * | 1992-06-26 | 1994-01-12 | 首钢总公司 | Useless wind recoverying and utilizing method of hotblast stove and device |
| CN2591047Y (en) * | 2002-12-31 | 2003-12-10 | 中冶集团北京钢铁设计研究总院 | Hot-blast furnace waste gas comprehensive utilizing device |
| CN103966379A (en) * | 2014-05-25 | 2014-08-06 | 北京首钢国际工程技术有限公司 | Waste air recycling device of hot blast stove with waste air buffer tank |
| CN104372129A (en) * | 2014-11-08 | 2015-02-25 | 鞍钢集团工程技术有限公司 | Device and process used for back flushing, deashing and pneumatic ash conveying by utilizing waste flue gas of hot blast heater |
-
2018
- 2018-08-31 CN CN201811013361.4A patent/CN109082492B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080659A (en) * | 1992-06-26 | 1994-01-12 | 首钢总公司 | Useless wind recoverying and utilizing method of hotblast stove and device |
| CN2591047Y (en) * | 2002-12-31 | 2003-12-10 | 中冶集团北京钢铁设计研究总院 | Hot-blast furnace waste gas comprehensive utilizing device |
| CN103966379A (en) * | 2014-05-25 | 2014-08-06 | 北京首钢国际工程技术有限公司 | Waste air recycling device of hot blast stove with waste air buffer tank |
| CN104372129A (en) * | 2014-11-08 | 2015-02-25 | 鞍钢集团工程技术有限公司 | Device and process used for back flushing, deashing and pneumatic ash conveying by utilizing waste flue gas of hot blast heater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109082492B (en) | 2020-08-07 |
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