CN103353236A - Workpiece heating furnace adopting combustible gases - Google Patents
Workpiece heating furnace adopting combustible gases Download PDFInfo
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- CN103353236A CN103353236A CN2012102466399A CN201210246639A CN103353236A CN 103353236 A CN103353236 A CN 103353236A CN 2012102466399 A CN2012102466399 A CN 2012102466399A CN 201210246639 A CN201210246639 A CN 201210246639A CN 103353236 A CN103353236 A CN 103353236A
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- fuel gas
- heater
- air preheater
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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 workpiece heating furnace adopting combustible gases, which comprises a furnace body, a first nozzle group, a second nozzle group, a flue gas channel, a first level air preheating system and a second level preheating system. The first level air preheating system comprises an air compressor, a first air pre-heater and a generator; the first air pre-heater is arranged in the flue gas channel; a portion of air enters into the first air pre-heater and changes heat with the high temperature gas after being compressed by an air compressor; the air preheated by the first air pre-heater enters into the generator for power generation; the air applied work to the generator is mixed with combustible gases through a first premixer and is sent into the first nozzle group. The second air preheating system comprises a second air pre-heater; the second air pre-heater is arranged in the flue gas channel below the first air pre-heater; the other portion of air is sent into the second air pre-heater and changes heat with the high temperature gas; the air preheated by the second pre-heater is mixed with the combustible gases through a second premixer and is then sent to the second nozzle group.
Description
Technical field
The present invention relates to a kind of heating furnace, particularly a kind of heating furnace that workpiece is heat-treated.
Background technology
As everyone knows, Industrial Stoves are a kind of equipment large, that pollution is heavy that consumes energy.All advocate energetically under the overall situation of energy-saving and emission-reduction in countries in the world, how existing Industrial Stoves are carried out the energy-saving and emission-reduction transformation, become the factor that those skilled in the art must consider when this kind equipment of design.
Take the steel-casting heating furnace as example, wherein the mixture of combustion gas and air sprays into respectively the heat release of burner hearth internal combustion through gas burner, its fire box temperature that needs is often up to more than 1200 degrees centigrade, and the flue-gas temperature of its smoke outlet also can reach 800～900 degrees centigrade usually.If these high-temperature flue gas directly are discharged in the environment, not only can cause energy waste also can cause to a certain degree destruction to environment.
Chinese patent application discloses a kind of gas heating furnace for the production of hot rolling high-carbon and high-chromium martensitic stain less steel for No. 200810236267.5, it comprises casing, this casing is rack-mount, these box house both sides are provided with at least one natural gas combustion nozzle, this natural gas combustion nozzle is connected with natural gas line, and described bottom half is provided with guide rail.This invention utilizes the pipe natural gas combustion heating, and natural gas supply is even, the heating furnace homogeneous heating, thus effectively prevent temperature overheating or underheat phenomenon in the heating furnace.Yet this patent application reckons without the heat energy how this recycles high-temperature flue gas No. 200810236267.5.
The heat sink of No. 200820106137.5 disclosed a kind of heater for rolling steel flues of Chinese patent and for example, it comprises air heat exchanger, air heat exchanger is fixedly mounted in the flue, it is characterized in that being installed into airduct on the front flue of air heat exchanger, flow control valve is installed on the blast pipe, air heat exchanger is installed Snorting tube by the cool air hose connecting fan on the cool air hose, flow control valve is installed on the Snorting tube.Although this patent has designed air heat exchanger No. 200820106137.5, only have one-level, and without the gas electricity generation system, that is, the utilization rate of fume afterheat is low.In addition, directly the air after the heat exchanger preheating is used for the combustion-supporting flue-gas temperature that enters chimney that also can cause up to more than 350 degree, causes energy waste.
Therefore, provide a kind of workpiece heating furnace of employing fuel gas of fully energy-saving and emission-reduction to become in the industry urgent problem.
Summary of the invention
The purpose of this invention is to provide a kind of workpiece heating furnace that adopts fuel gas, this workpiece heating furnace can fully be recycled the waste heat of high-temperature flue gas and improve the efficiency of combustion of heating furnace.
The invention provides a kind of workpiece heating furnace that adopts fuel gas, it comprises: body of heater is provided with the burner hearth for accommodating workpiece to be heated in the body of heater; The first nozzle sets and second nozzle group, the first nozzle sets and second nozzle group comprise respectively along the longitudinal direction of body of heater and are disposed at least three nozzles on the sidewall of body of heater; And flue, flue is connected on the end wall of body of heater and is expelled to chimney with the flue gas that will produce in the burner hearth.This workpiece heating furnace also comprises first order air preheating system and second level air preheating system.First order air preheating system comprises air compressor, the first air preheater and generator; The first air preheater is arranged in the flue and has flue gas stream and air flow circuit; Air compressor will be from sending in the air flow circuit of the first air preheater by pipeline after the air pressurized of external environment condition in case with the high-temperature flue gas heat exchange of the flue gas stream of first air preheater of flowing through; The air of the preheating of pressurizeing of flowing out from the air flow circuit of the first air preheater is sent into generator by pipeline and is used for generating; To the air after the generator acting through the first premixed device with send into the first nozzle sets to spray into the heat release of burner hearth internal combustion through pipeline again after fuel gas mixes.Second level air preheating system comprises the second air preheater; The second air preheater is arranged at the downstream of the first air preheater in flue; The second air preheater has flue gas stream and air flow circuit; Send into by pipeline from the air of external environment condition in the air flow circuit of the second air preheater so as with the high-temperature flue gas heat exchange of the flue gas stream of second air preheater of flowing through; By the air of the second air preheater preheating through the second premixed device with send into the second nozzle group to spray into the heat release of burner hearth internal combustion through pipeline again after fuel gas mixes.
Wherein, fuel gas can be natural gas or coal gas.
Wherein, steel-casting to be heated can be cast steel bar, cast steel plate or carborundum plate.
Wherein, generator can be turbine generators or turbogenerator.
Wherein, the first air preheater can be surface-type heat exchanger or heat regenerator.
Wherein, the second air preheater can be surface-type heat exchanger or heat-pipe heat exchanger.
Preferably, the temperature in the burner hearth can be set as 1100～1300 and take the photograph third constellations degree, and more preferably 1200～1300 degrees centigrade, such as about 1200 degrees centigrade.
Preferably, air compressor can be with from the air pressurized to 0.3 of outside～0.8 MPa, and 0.4～0.6 MPa more preferably is such as about 0.5 MPa.
Preferably, the temperature of the flue gas in the flue before flowing into the first air preheater can be set as 700～900 degrees centigrade, and more preferably 800～900 degrees centigrade, such as about 900 degrees centigrade; And the temperature of flue gas after flowing out the first air preheater can be set as 400～600 degrees centigrade, more preferably 400～500 degrees centigrade, and such as about 500 degrees centigrade.
Preferably, the temperature after air is heated by the first air preheater can be set as 500～650 degrees centigrade, and more preferably 550～650 degrees centigrade, such as about 600 degrees centigrade.
Preferably, can be set as 0.1～0.2 MPa to the pressure of the air after the generator acting, 0.12～0.15 MPa more preferably is such as about 0.125 MPa.
Preferably, the first nozzle sets and second nozzle group can be arranged at respect to the longitudinal axis of body of heater the relative both sides of body of heater, at least three nozzles of the first nozzle sets and the successively vis-a-vis setting of at least three nozzles of second nozzle group, with the mixture of fuel gas and preheated air so that the mode of blowing is sprayed in the burner hearth.
More preferably, the first nozzle sets and second nozzle group can comprise respectively along the longitudinal direction of body of heater and uniformly-spaced be arranged on the sidewall of body of heater three or three with top nozzle.
Preferably, this workpiece heating furnace may further include the first ajutage group and the second ajutage group, be delivered to each nozzle of the first nozzle sets via the first ajutage group from the mixture of the fuel gas of the first premixed device and preheated air, be delivered to each nozzle of second nozzle group via the second ajutage group from the mixture of the fuel gas of the second premixed device and preheated air, wherein, the first ajutage group comprises respectively the arm corresponding with each nozzle of the first nozzle sets and second nozzle group with the second ajutage group.
The invention has the beneficial effects as follows: workpiece heating furnace of the present invention can be recycled fume afterheat fully by adopting first order air preheating system and second level air preheating system; By adopting air compressor to increase air pressure, be conducive to air in the first air preheater with flue gas heat exchange, can improve the fume afterheat utilization rate; By adopting generator, the energy of the air of pressurization preheating being used for suitably being converted into electric energy before combustion-supporting, has been avoided energy dissipation; Air after the generator acting is also had about 300 degrees centigrade temperature, still can fully improve efficiency of combustion used as combustion air; Adopt the premixed combustion mode, and adopt the first nozzle sets and second nozzle group the mode of blowing is carried the mixture of preheated air and fuel gas in the burner hearth, can further improve efficiency of combustion.
Description of drawings
Fig. 1 shows the schematic diagram of the workpiece heating furnace of employing fuel gas of the present invention.
The specific embodiment
According to one embodiment of the present invention, adopt the workpiece heating furnace 100 of fuel gas to be used for steel-casting is heat-treated, wherein, fuel gas adopts natural gas.
Be provided with the burner hearth (not shown) for accommodating workpiece (not shown) in the body of heater 110, the Temperature Setting in the burner hearth is about 1200 degrees centigrade.
The first nozzle sets 120 and second nozzle group 121 are arranged at respectively with respect to the longitudinal axis of body of heater 110 on the two side of body of heater 110 and provide to burner hearth with the mixture with fuel gas and air.In this embodiment, the first nozzle sets 120 and second nozzle group 121 comprise respectively three nozzles that uniformly-spaced arrange along the longitudinal direction of body of heater 110.Wherein, three nozzles of the first nozzle sets 120 and three successively vis-a-vis settings of nozzle of second nozzle group 121, with the mixture of fuel gas and air so that the mode of blowing is sent in the burner hearth.
The first ajutage group 130 and the second ajutage group 131 are delivered to the first nozzle sets 120 and second nozzle group 121 with the mixture of fuel gas and air respectively.In this embodiment, three arms 1301 of the first ajutage group 130 are connected to respectively three nozzles of the first nozzle sets 120, and three arms 1311 of the second ajutage group 131 are connected to respectively three nozzles of second nozzle group 121.
The first air preheater 160 is arranged in the flue 140 and has flue gas stream (not shown) and air flow circuit (not shown).Air after the pressurization send in the air flow circuit of the first air preheater 160 in case with the high-temperature flue gas heat exchange of the flue gas stream of first air preheater 160 of flowing through.The Temperature Setting of flue gas in the flue 140 before flowing into the first air preheater 160 is about 900 degrees centigrade; And the Temperature Setting of flue gas after flowing out the first air preheater 160 is about 500 degrees centigrade.In the present embodiment, the first air preheater 160 is surface-type heat exchanger, that is, the different two kinds of fluids of temperature flow in the space that is separated by wall, and the heat conduction by wall and fluid carry out heat exchange in the wall surface convection current between two kinds of fluids.
The Temperature Setting of air after by 160 preheatings of the first air preheater is about 600 degrees centigrade.The air of the preheating of pressurizeing of flowing out from the air flow circuit of the first air preheater 160 is sent into generator 170 by pipeline (not label) and is used for generating electricity.Pressure setting to the air after generator 170 actings is about 0.1 MPa, and the Temperature Setting of air is about 300 degrees centigrade.In the present embodiment, generator 170 is turbine generators, and the air of its preheating of will pressurizeing imports turbo-expander expansion acting and drives generator, for example blast-furnace top gas recovery turbine generator (TRT).
Air after generator 170 actings is sent into the first premixed device 180 through pipeline (not label), and evenly mix with combustion gas from the first gas service pipe line 1801 therein, then mist enters the first ajutage group 130 through pipeline (not label), sprays into burner hearth by the first nozzle sets 120 at last.
The second air preheater 161 and respective lines consist of the second level air preheating system of this workpiece heating furnace 100.The second air preheater 161 is positioned at the downstream of the first air preheater 160 in flue 140, with the waste heat of further recycling from about 500 degrees centigrade flue gas of the first air preheater 160 outflows.In this embodiment, the second air preheater 161 has identical structure with the first air preheater 160.Air from external environment condition enters 161 preheatings of the second air preheater through the second air introduction pipe line 1611.Air after the preheating is sent into the second premixed device 181 through pipeline (not label), and evenly mix with combustion gas from the second gas service pipe line 1811 therein, then mist enters the second ajutage group 131 through pipeline (not label), sprays into burner hearth by second nozzle group 121 at last.
According to a kind of alternate embodiments of the present invention, the first air preheater and/or the second air preheater can adopt heat regenerator, namely, heat storage by the solid matter formation, heat is passed to cryogen from high temperature fluid, after thermal medium reached uniform temperature by the heat solid material first, cold medium was heated by solid matter again, made it to reach the purpose that heat transmits.According to this alternate embodiments, can adopt two groups of heat regenerators that are used alternatingly to replace the first air preheater or the second air preheater.
According to another kind of alternate embodiments of the present invention, the second air preheater and the first air preheater can have not isostructure, can adopt heat exchange of heat pipe such as the second air preheater.
According to another alternate embodiments of the present invention, adopt the workpiece heating furnace of fuel gas to be used for carborundum plate is heat-treated, wherein, fuel gas adopts coal gas.Generator is turbogenerator, that is, rotate and then generating by the air push turbine.Temperature in the burner hearth can be set as 1100 degrees centigrade.Air compressor can be with air pressurized to 0.4 MPa from the outside.
Although described preferred embodiment of the present invention in detail at this, but should be understood that the present invention is not limited to the concrete structure of describing in detail and illustrating here, in the situation that does not depart from the spirit and scope of the invention, can be realized by those skilled in the art other modification and variant.For example, each ajutage group can select to comprise more than or be less than three arm, and each nozzle sets also can select to adopt more than or be less than three nozzle, adopts two, four or six nozzles such as every group.And heating furnace of the present invention can also be used for other workpiece is heat-treated, such as the carborundum workpiece.In addition, system's temperature and pressure parameter everywhere can suitably be chosen in scope disclosed in this invention according to concrete application conditions.
Claims (10)
1. workpiece heating furnace that adopts fuel gas comprises:
Body of heater is provided with the burner hearth for accommodating workpiece to be heated in the described body of heater;
The first nozzle sets and second nozzle group, described the first nozzle sets and described second nozzle group comprise respectively along the longitudinal direction of described body of heater and are disposed at least three nozzles on the sidewall of described body of heater; And
Flue, described flue are connected on the end wall of described body of heater and are expelled to chimney with the flue gas that will produce in the described burner hearth;
It is characterized in that:
The workpiece heating furnace of described employing fuel gas also comprises first order air preheating system and second level air preheating system;
Described first order air preheating system comprises air compressor, the first air preheater and generator; Described the first air preheater is arranged in the described flue and has flue gas stream and air flow circuit; Described air compressor will be from sending in the air flow circuit of described the first air preheater by pipeline after the air pressurized of external environment condition in case with the high-temperature flue gas heat exchange of the flue gas stream of described the first air preheater of flowing through; The air of the preheating of pressurizeing of flowing out from the air flow circuit of described the first air preheater is sent into described generator by pipeline and is used for generating; To the air after the acting of described generator through the first premixed device with send into described the first nozzle sets to spray into the heat release of described burner hearth internal combustion through pipeline again after fuel gas mixes;
Described second level air preheating system comprises the second air preheater; Described the second air preheater is arranged at the downstream of described the first air preheater in described flue; Described the second air preheater has flue gas stream and air flow circuit; Send into by pipeline from the air of external environment condition in the air flow circuit of described the second air preheater so as with the high-temperature flue gas heat exchange of the flue gas stream of described the second air preheater of flowing through; By the air of described the second air preheater preheating through the second premixed device with send into described second nozzle group to spray into the heat release of described burner hearth internal combustion through pipeline again after fuel gas mixes.
2. the workpiece heating furnace of employing fuel gas as claimed in claim 1 is characterized in that, the Temperature Setting in the described burner hearth is 1100～1300 degrees centigrade, and described air compressor will be from the air pressurized to 0.5 of external environment condition～0.8 MPa.
3. the workpiece heating furnace of employing fuel gas as claimed in claim 1, it is characterized in that, the Temperature Setting of flue gas in the described flue before flowing into described the first air preheater is 800～900 degrees centigrade, and the Temperature Setting after flowing out described the first air preheater is 400～500 degrees centigrade.
4. the workpiece heating furnace of employing fuel gas as claimed in claim 3, its grade is levied and is, the Temperature Setting of air after by described the first air preheater preheating is 500～600 degrees centigrade, and the pressure setting of air after to described generator acting is 0.1～0.2 MPa.
5. such as the workpiece heating furnace of each described employing fuel gas in the claim 1～4, it is characterized in that described fuel gas is natural gas or coal gas, described workpiece to be heated is cast steel bar, cast steel plate or carborundum plate.
6. such as the workpiece heating furnace of each described employing fuel gas in the claim 1～4, it is characterized in that described generator is turbine generators or turbogenerator.
7. such as the workpiece heating furnace of each described employing fuel gas in the claim 1～4, it is characterized in that described the first air preheater is surface-type heat exchanger or heat regenerator, described the second air preheater is heat-pipe heat exchanger.
8. such as the workpiece heating furnace of each described employing fuel gas in the claim 1～4, it is characterized in that, described the first nozzle sets and described second nozzle group are arranged at the relative both sides of described body of heater with respect to the longitudinal axis of described body of heater, the successively vis-a-vis setting of described at least three nozzles of described at least three nozzles of described the first nozzle sets and described second nozzle group, with the mixture of fuel gas and preheated air so that the mode of blowing is sprayed in the described burner hearth.
9. the workpiece heating furnace of employing fuel gas as claimed in claim 8, it is characterized in that described at least three nozzles of described the first nozzle sets and described at least three nozzles of described second nozzle group uniformly-spaced are arranged on the sidewall of described body of heater along the longitudinal direction of described body of heater respectively.
10. the workpiece heating furnace of employing fuel gas as claimed in claim 9, it is characterized in that, further comprise the first ajutage group and the second ajutage group, be delivered to each nozzle of described the first nozzle sets via described the first ajutage group from the mixture of the fuel gas of described the first premixed device and preheated air, be delivered to each nozzle of described second nozzle group via described the second ajutage group from the mixture of the fuel gas of described the second premixed device and preheated air, wherein, described the first ajutage group comprises respectively the arm corresponding with each nozzle of described the first nozzle sets and described second nozzle group with described the second ajutage group.
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| CN2012102466399A CN103353236A (en) | 2012-07-17 | 2012-07-17 | Workpiece heating furnace adopting combustible gases |
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| CN2012102466399A CN103353236A (en) | 2012-07-17 | 2012-07-17 | Workpiece heating furnace adopting combustible gases |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832231A (en) * | 2015-04-27 | 2015-08-12 | 南京瑞柯徕姆环保科技有限公司 | Fuel heat treatment furnace flue gas residual heat power generation method and device |
| CN104863652A (en) * | 2015-04-27 | 2015-08-26 | 南京瑞柯徕姆环保科技有限公司 | Waste heat power generation method and device adopting Brayton cycle |
| CN105571337A (en) * | 2016-01-27 | 2016-05-11 | 广东工业大学 | Energy-saving industrial furnace adopting biomass gasification combustion power generation system |
| CN106011430A (en) * | 2016-07-25 | 2016-10-12 | 无锡市曙光高强度紧固件有限公司 | Heat treatment equipment of fastening piece |
| CN106197049A (en) * | 2016-08-31 | 2016-12-07 | 上海浩用节能工程有限公司 | A kind of waste heat recovery system of pipe heater and method |
| CN110440593A (en) * | 2019-08-13 | 2019-11-12 | 蚌埠市昆宇机械加工厂 | A kind of glass processing heating device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832231A (en) * | 2015-04-27 | 2015-08-12 | 南京瑞柯徕姆环保科技有限公司 | Fuel heat treatment furnace flue gas residual heat power generation method and device |
| CN104863652A (en) * | 2015-04-27 | 2015-08-26 | 南京瑞柯徕姆环保科技有限公司 | Waste heat power generation method and device adopting Brayton cycle |
| CN105571337A (en) * | 2016-01-27 | 2016-05-11 | 广东工业大学 | Energy-saving industrial furnace adopting biomass gasification combustion power generation system |
| CN105571337B (en) * | 2016-01-27 | 2019-06-14 | 广东工业大学 | Using the energy-saving industrial kiln of biomass gasification fired electricity generation system |
| CN106011430A (en) * | 2016-07-25 | 2016-10-12 | 无锡市曙光高强度紧固件有限公司 | Heat treatment equipment of fastening piece |
| CN106197049A (en) * | 2016-08-31 | 2016-12-07 | 上海浩用节能工程有限公司 | A kind of waste heat recovery system of pipe heater and method |
| CN110440593A (en) * | 2019-08-13 | 2019-11-12 | 蚌埠市昆宇机械加工厂 | A kind of glass processing heating device |
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Address after: 528131 Guangdong province Foshan Sanshui Baini Town Industrial Road No. 93 four floor Applicant after: Foshan Guangxu Energy-Saving Automation Technology Co., Ltd. Applicant after: Foshan Guangshun Electrical Equipment Co., Ltd. Applicant after: Guangdong Guangshun New Energy Power Technology Co., Ltd. Address before: 528000, two, south side of Building 1, No. four, Huabao South Road, Chancheng District, Guangdong, Foshan Applicant before: Foshan Guangxu Energy-Saving Automation Technology Co., Ltd. Applicant before: Foshan Guangshun Electrical Equipment Co., Ltd. Applicant before: Guangdong Guangshun New Energy Power Technology Co., Ltd. |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131016 |