CN101825283A - Method for improving thermal efficiency of regenerative heating furnace - Google Patents
Method for improving thermal efficiency of regenerative heating furnace Download PDFInfo
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- CN101825283A CN101825283A CN201010162191A CN201010162191A CN101825283A CN 101825283 A CN101825283 A CN 101825283A CN 201010162191 A CN201010162191 A CN 201010162191A CN 201010162191 A CN201010162191 A CN 201010162191A CN 101825283 A CN101825283 A CN 101825283A
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention discloses a method for improving the thermal efficiency of a regenerative heating furnace belonging to the technical field of a steel rolling furnace, which is a method for improving the thermal efficiency of the regenerative heating furnace by utilizing hot air of a conventional flue air heat exchanger. The method is characterized by comprising the following steps: hot air heated by using a conventional flue internal heat exchanger is mixed with cold air in a cold air pipe for a regenerative burner of the regenerative heating furnace through a pipeline; the cold air pipe of the regenerative heating furnace is provided with a pressure regulating valve, and pressure of cold air of the cold air pipe passing through the pressure regulating valve is controlled to be smaller than that of a hot air pipeline to ensure that the hot air pipeline is communicated in the cold air pipe, and the conventional bleeding regulating valve is arranged on the hot air pipeline in a shifting mode to improve the thermal efficiency of the burner of the regenerative heating furnace. The method has the advantages of recycling the diffuse hot air, realizing automatic control of a residual heat recycle system, improving combustion-supporting air temperature of the regenerative burner, improving the combustion condition of the regenerative burner, and improving the working efficiency of a heat storage tank. The method for improving the thermal efficiency of the regenerative heating furnace is worthy of adopting and popularizing.
Description
One. technical field
The method of raising thermal efficiency of regenerative heating furnace disclosed by the invention belongs to the heater for rolling steel technical field, and what be specifically related to is a kind of method of utilizing the hot-air raising thermal efficiency of regenerative heating furnace after conventional flue air heat exchanger heats.
Two. background technology
The newly-built 4# heating furnace of our factory is a recuperative heater, and in the not heat supply of heating furnace heat-recovery section, blank absorbs fume afterheat.Bringing-up section is used air single regenerative burner, preheating section, a bringing-up section, two bringing-up sections adopt side direction air single regenerative heat supply burner, cold air is heated to be high temperature air through heat storage and sprays into burner hearth and gas-fired during burning, the heat accumulating type high-temperature flue gas to the heat storage heat release after regenerative flue enters chimney by air-introduced machine.Soaking zone has kept conventional flat flame, the conventional control mode of side burner.Flat flame burner is adopted on soaking zone top, and conventional side direction low NOx burner pulse heat supply is adopted in the soaking zone bottom, and cold air is heated to be high temperature air and enters the heating furnace burning behind conventional flue air heat exchanger.Since in November, 2007 operation of 4# heating furnace, conventional chimney meatus transmitting smoke temperature reaches 480～520 ℃, and than about 360～410 ℃ high 100 ℃ of our factory 1～3# heating furnace chimney meatus transmitting smoke temperature, the heat-accumulating burner exhaust gas temperature reaches 160～180 ℃, the fuel input amount is bigger than normal than 1～3# heating furnace, and the thermal efficiency is on the low side.The design of flue is divided into heat accumulating type exit flue and conventional exit flue.In the improvement that 4# heating furnace combustion-aid air system is carried out or improving, portion of hot air after the conventional chimney heat exchanger heating is mixed with the cold air that heat-accumulating burner uses, improve on the one hand and enter the preceding air themperature of heat storage tank, reduce the exhaust gas temperature of the conventional flue of heating furnace on the other hand, the final comprehensive exhaust gas temperature that reduces heating furnace, improve thermal efficiency of regenerative heating furnace, make recuperative heater realize energy-saving and cost-reducing, low-carbon environment-friendly.This is the effect and the advantage of technical solution of the present invention just.
Three. summary of the invention
The objective of the invention is: the method that this raising thermal efficiency of regenerative heating furnace is provided to society, this method can make through the conventional flue temperature behind the heat exchanger and reduce by 80～120 ℃, the initial temperature of heat-accumulating burner cold wind improves 40～80 ℃, thermal efficiency of heating furnace reaches better state, realizes the energy-saving and cost-reducing of recuperative heater.
Technical scheme of the present invention is such: the method for this raising thermal efficiency of regenerative heating furnace, be to utilize conventional flue air heat exchanger hot-air to improve the method for thermal efficiency of regenerative heating furnace, technical characterstic is: this method is: utilize the hot-air after the heat exchanger heating in the conventional flue to mix with cold air in the cool air hose that the recuperative heater heat-accumulating burner is used by pipeline, with the raising recuperative heater burner thermal efficiency.This method with heat exchanger before cold wind pipeline, exchanger heat air header transform, make heat exchanger can guarantee to also have enough hot blasts to use outward for heat-accumulating burner for conventional burner hot blast.
According to the method for above-described raising thermal efficiency of regenerative heating furnace, technical characterstic also has: described this method is: must be less than the pressure of hot-air pipeline at the cold air pressure that is provided with or is equipped with pressure regulator valve and monitoring cool air hose behind this pressure regulator valve on the recuperative heater cool air hose.The hot-blast pipe line exhaust stack is revised, former hot blast exhaust stack control valve displacement, and hot blast diffuses pipeline and cuts off the exhaust stack that leads to outside the factory building.Connect a pipeline from the hot-blast main and lead to the cold wind house steward, the former control valve that diffuses is installed on the pipeline, on the cold wind house steward, increase pressure regulator valve, be used for regulating pressure and guarantee the heat-accumulating burner operating mode.Behind the newly-increased pressure regulator valve, need hand-operated valve, sleeve pipe cooling air-valve, original control valve, orifice plate and pairing transmitter thereof before the burner are readjusted verification.
Method according to above-described raising thermal efficiency of regenerative heating furnace, technical characterstic also has: described this method is: the hot-air pipeline is communicated in the cool air hose and at hot-air pipeline superior displacement the former control valve that diffuses is installed, former hot blast diffuses pipeline and cuts off the exhaust stack and the shutoff of leading to outside the factory building.Described this control valve be adjusted to involute, chain with pressure, temperature dual.
According to the method for above-described raising thermal efficiency of regenerative heating furnace, technical characterstic also has: the pressure regulator valve that is provided with on the described recuperative heater cool air hose or installs is an electrical control valve.Pressure regulator valve is " dead electricity is opened, De Dianguan " type.If hot-blast pressure is lower than cold wind pressure and must cuts off the hot blast control valve.Can open the hot blast control valve when having only hot-blast pressure to be higher than cold wind pressure.
According to the method for above-described raising thermal efficiency of regenerative heating furnace, technical characterstic also has that described hot-air pipeline superior displacement installs formerly diffuses pressure, the temperature dual joint control interlocking valve that control valve is an involute.
The advantage that the present invention improves the method for thermal efficiency of regenerative heating furnace has: 1. pair diffuse hot blast and recycle.2. realized the automatic control of residual neat recovering system.3. improve the heat-accumulating burner combustion air temperature, improved the burning condition of heat-accumulating burner, improved the heat storage tank operating efficiency.The method of this raising thermal efficiency of regenerative heating furnace is energy-saving and cost-reducing, low-carbon environment-friendly, is worth adopting and promoting.
Four. description of drawings
Figure of description of the present invention has 2 width of cloth:
Fig. 1 is for improving the method pipeline structure front view of thermal efficiency of regenerative heating furnace;
Fig. 2 is for improving the method pipeline structure vertical view of thermal efficiency of regenerative heating furnace.
Adopted unified label in two figure, promptly same object is used same label in two figure.In two figure: 1. heat-accumulating burner is with cold wind house steward pressure regulator valve; 2. hot blast control valve; 3. cold wind house steward communicating pipe before hot blast exhaust stack and the heat storage tank; 4. heat-accumulating burner is used the cold wind house steward; 5. air heat exchanger; 6. cold wind house steward before the air heat exchanger; 7. hot-blast main behind the air heat exchanger; 8. lead to the outer hot blast of factory building and diffuse house steward.
Five. the specific embodiment
The non-limiting examples of method that the present invention improves thermal efficiency of regenerative heating furnace is as follows:
Embodiment one. improve the method for thermal efficiency of regenerative heating furnace
The method of the raising thermal efficiency of regenerative heating furnace of this example, be to utilize conventional flue air heat exchanger hot-air to improve the method for thermal efficiency of regenerative heating furnace, these method and technology characteristics are: utilize the hot-air after the heat exchanger heating in the conventional flue to mix with cold air in the cool air hose that the recuperative heater heat-accumulating burner is used by pipeline, with the raising recuperative heater burner thermal efficiency.The embodiment of this method is used in the transformation of the Taiyuan Iron and Steel Co. 2250mm hot continuous rolling 4# of factory heating furnace, and the concrete structure of transformation is united by Fig. 1～Fig. 2 and illustrated, to improve this 4# recuperative heater burner thermal efficiency.In two figure: the 1st, heat-accumulating burner is with cold wind house steward pressure regulator valve, the 2nd, and cold wind house steward communicating pipe, the 4th before the hot blast control valve, the 3rd, hot blast exhaust stack and heat storage tank, heat-accumulating burner is with cold wind house steward, the 5th, cold wind house steward, the 7th before the air heat exchanger, the 6th, air heat exchanger, hot-blast main, the 8th behind the air heat exchanger is led to factory building hot blast outward and is diffused house steward.The cold wind pipeline is revised before the one, heat exchanger, changes 610 * 5mm into by former 508 * 5mm, increase concentric reducer 610/508mm before the heat exchanger, heat exchanger after heat air header changes 966 * 5mm into by 864 * 5mm, and the heat exchanger dust diameter changes 57mm into by 51mm, reaches the purpose that increases the warm-air supply amount.Its two, implement this method and the hot-air pipeline is led in the cool air hose and the former control valve 2 that diffuses be installed at hot-air pipeline superior displacement.The hot-blast pipe line exhaust stack is revised, and with former hot blast exhaust stack control valve 2 displacements, hot blast diffuses pipeline and changes cold wind house steward before the heat storage tank into, and the former control valve 2 that diffuses is installed on the pipeline, realizes diffusing hot blast and is recovered to before the heat storage tank in the cold wind house steward.Former hot blast diffuses pipeline and cuts off the exhaust stack and the shutoff of leading to outside the factory building.Described hot-air pipeline superior displacement is installed formerly diffuses pressure, the temperature dual joint control interlocking valve that control valve 2 is involutes.Its three, implement this method, must be at the cold air pressure that is provided with or is equipped with pressure regulator valve 1 and monitoring cool air hose behind this pressure regulator valve 1 on the recuperative heater cool air hose less than the pressure of hot-air pipeline.The pressure regulator valve 1 that is provided with on the recuperative heater cool air hose or installs is an electrical control valve, and pressure regulator valve is " dead electricity is opened, De Dianguan " type.The cold wind house steward goes up before the heat storage tank increases pressure regulator valve 1, the parameter of pressure regulator valve 1 is 13kPa before the valve, 10～10.5kPa behind the valve, diffusing hot-blast pressure is 11kPa, hot blast control valve 2 is adjusted to involute, chain with pressure, temperature dual, guarantee hot-blast pressure all the time greater than cold wind pressure, if hot-blast pressure is lower than cold wind pressure and must cuts off hot-blast valve.Realize reclaiming the automatic control that hot blast participates in the preceding cold wind house steward of heat storage tank.Pressure regulator valve 1, control valve 2 all adopt public commercial goods to get final product.The method of this raising thermal efficiency of regenerative heating furnace is energy-saving and cost-reducing, low-carbon environment-friendly, is worth adopting and promoting.
Claims (5)
1. method that improves thermal efficiency of regenerative heating furnace, be to utilize conventional flue air heat exchanger hot-air to improve the method for thermal efficiency of regenerative heating furnace, be characterised in that: this method is: utilize the hot-air after the heat exchanger heating in the conventional flue to mix with cold air in the cool air hose that the recuperative heater heat-accumulating burner is used by pipeline, with the raising recuperative heater burner thermal efficiency.
2. the method for raising thermal efficiency of regenerative heating furnace according to claim 1 is characterised in that: described this method is: must be less than the pressure of hot-air pipeline at the cold air pressure that is provided with or installs pressure regulator valve and monitoring cool air hose behind this pressure regulator valve on the recuperative heater cool air hose.
3. the method for raising thermal efficiency of regenerative heating furnace according to claim 1, be characterised in that: described this method is: the hot-air pipeline is communicated in the cool air hose and at hot-air pipeline superior displacement the former control valve that diffuses is installed, former hot blast diffuses pipeline and cuts off the exhaust stack and the shutoff of leading to outside the factory building.
4. the method for raising thermal efficiency of regenerative heating furnace according to claim 2 is characterised in that: the pressure regulator valve that is provided with on the described recuperative heater cool air hose or installs is an electrical control valve.
5. the method for raising thermal efficiency of regenerative heating furnace according to claim 3 is characterised in that: described hot-air pipeline superior displacement is installed formerly diffuses pressure, the temperature dual joint control interlocking valve that control valve is an involute.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010162191A CN101825283A (en) | 2010-04-30 | 2010-04-30 | Method for improving thermal efficiency of regenerative heating furnace |
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| CN201010162191A CN101825283A (en) | 2010-04-30 | 2010-04-30 | Method for improving thermal efficiency of regenerative heating furnace |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966942A (en) * | 2012-12-19 | 2013-03-13 | 王茂军 | Non-reversing flame-heat-accumulating-type combustion device |
| CN103388071A (en) * | 2012-05-10 | 2013-11-13 | 宝山钢铁股份有限公司 | Hot rolling heating furnace and local strengthening heating control method thereof |
| CN103411232A (en) * | 2013-08-15 | 2013-11-27 | 北京首钢国际工程技术有限公司 | Design and transformation method for double-heat-storage combustion system suitable for coal gas with different heat values |
| CN108330272A (en) * | 2018-01-19 | 2018-07-27 | 山东钢铁集团日照有限公司 | A kind of single Regeneratiue billet reheating furnace using blast furnace gas |
| CN112097534A (en) * | 2020-09-15 | 2020-12-18 | 法孚斯坦因冶金技术（上海）有限公司 | Digital single heat accumulating type heating furnace |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58120020A (en) * | 1982-01-13 | 1983-07-16 | Mitsubishi Heavy Ind Ltd | Disposal of exhaust smoke |
| JPH0376788A (en) * | 1989-08-18 | 1991-04-02 | Ishikawajima Harima Heavy Ind Co Ltd | Drying and heating dry quenching equipment of coke oven |
| CN1067730A (en) * | 1991-06-08 | 1993-01-06 | 冶金工业部马鞍山钢铁设计研究院 | Utilize flue gas and hot blast method and device for the heating heavy oil of thermal source |
| JP2001324107A (en) * | 2000-05-16 | 2001-11-22 | Mitsubishi Heavy Ind Ltd | Fluidized bed incinerator facility |
| CN2705464Y (en) * | 2003-12-08 | 2005-06-22 | 山东省冶金设计院 | High temperature hot-air furnace |
| CN200996026Y (en) * | 2006-12-19 | 2007-12-26 | 江苏中天能源设备有限公司 | Combined heat exchange system for realizing high air temperature of hot blast stove |
-
2010
- 2010-04-30 CN CN201010162191A patent/CN101825283A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58120020A (en) * | 1982-01-13 | 1983-07-16 | Mitsubishi Heavy Ind Ltd | Disposal of exhaust smoke |
| JPH0376788A (en) * | 1989-08-18 | 1991-04-02 | Ishikawajima Harima Heavy Ind Co Ltd | Drying and heating dry quenching equipment of coke oven |
| CN1067730A (en) * | 1991-06-08 | 1993-01-06 | 冶金工业部马鞍山钢铁设计研究院 | Utilize flue gas and hot blast method and device for the heating heavy oil of thermal source |
| JP2001324107A (en) * | 2000-05-16 | 2001-11-22 | Mitsubishi Heavy Ind Ltd | Fluidized bed incinerator facility |
| CN2705464Y (en) * | 2003-12-08 | 2005-06-22 | 山东省冶金设计院 | High temperature hot-air furnace |
| CN200996026Y (en) * | 2006-12-19 | 2007-12-26 | 江苏中天能源设备有限公司 | Combined heat exchange system for realizing high air temperature of hot blast stove |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388071A (en) * | 2012-05-10 | 2013-11-13 | 宝山钢铁股份有限公司 | Hot rolling heating furnace and local strengthening heating control method thereof |
| CN103388071B (en) * | 2012-05-10 | 2014-12-24 | 宝山钢铁股份有限公司 | Local strengthening heating control method of hot rolling heating furnace |
| CN102966942A (en) * | 2012-12-19 | 2013-03-13 | 王茂军 | Non-reversing flame-heat-accumulating-type combustion device |
| CN103411232A (en) * | 2013-08-15 | 2013-11-27 | 北京首钢国际工程技术有限公司 | Design and transformation method for double-heat-storage combustion system suitable for coal gas with different heat values |
| CN103411232B (en) * | 2013-08-15 | 2015-08-05 | 北京首钢国际工程技术有限公司 | A kind of applicable different calorific value of gas Two-cuff Technique Combustion System Design and remodeling method |
| CN108330272A (en) * | 2018-01-19 | 2018-07-27 | 山东钢铁集团日照有限公司 | A kind of single Regeneratiue billet reheating furnace using blast furnace gas |
| CN112097534A (en) * | 2020-09-15 | 2020-12-18 | 法孚斯坦因冶金技术（上海）有限公司 | Digital single heat accumulating type heating furnace |
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Open date: 20100908 |