CN100478611C - Heat accumulation type low-oxidization heating furnace - Google Patents
Heat accumulation type low-oxidization heating furnace Download PDFInfo
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- CN100478611C CN100478611C CNB2007100782155A CN200710078215A CN100478611C CN 100478611 C CN100478611 C CN 100478611C CN B2007100782155 A CNB2007100782155 A CN B2007100782155A CN 200710078215 A CN200710078215 A CN 200710078215A CN 100478611 C CN100478611 C CN 100478611C
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- burner hearth
- spray orifice
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Abstract
The invention discloses a thermal-accumulated little-oxidization heating furnace, comprising a thermal-accumulated burning furnace, a hearth and a thermal-accumulated nozzle. The upper layer of hearth is arranged with at least two air injectors connected with the combustion and smoke tube of the thermal-accumulated nozzle. The upper part of the hearth is arranged with at least one main fuel injector. The lower layer of hearth is arranged with at least one combustion injector. The invention burns fuel interlayer, while the upper layer of hearth has over more oxygen to burn the fuel completely, and the lower layer only has injected fuel and the metal element is surrounded by the reducing gas, to avoid oxidizing the metal element. The incompletely burnt CO and H2 are ventilated to the oxidization area to be burnt with the oxygen to avoid pollution.
Description
Technical field
The present invention relates to a kind of heat storage type combustion heating furnace, especially heat oxidation heat accumulation type low-oxidization heating furnace seldom under the reducing atmosphere of protective effect having being heated metalwork.
Background technology
The heat storage type combustion stove is heat-accumulating burner A, the B that adopts paired quantity combusted to be directly proportional with exhaust smoke level, and the high-temperature flue gas that burning is produced carries out waste heat recovery.When a side burner A burnt, opposite side burner B carried out air-breathing smoke evacuation to the high-temperature flue gas in the burner hearth, high-temperature flue gas during by this burner heat storage and heat storage carry out thermal energy exchange, heat storage heat absorption, high-temperature flue-gas reduce, and are discharged from last.Through certain hour, the burning commutation, burner B burning, cold air or combustion gas enter burner through the very high A burner heat storage of excess temperature, are heated into high temperature air or combustion gas by this heat storage, with combustion gas or air mixed combustion; Simultaneously, the A burner carries out air-breathing smoke evacuation, and high-temperature flue gas with heat storage heating in the A burner, carries out heat exchange again.By the continuous alternate combustion repeatedly of paired burner A, B, high-temperature flue gas is carried out limit waste heat recovery, reach energy-conservation effect.In the prior art, adopted the heat storage type combustion stove to come the heating of metal part.Metalwork to be heated is placed in the high-temperature burner hearth of heat storage type combustion stove, in high-temperature heating process, air in being heated metalwork and feeding burner hearth, fuel etc. contact, react, be exposed in the air, all inevitably can cause the oxidation of metalwork, at high temperature, the oxidative phenomena of metalwork is serious more in the burner hearth of high temperature.And metalwork is oxidized, not only will influence the performance after its processing, and make production cost increase greatly, so should reduce the oxidative phenomena of metalwork in burner hearth.
The method of the oxidation of heating furnace minimizing at present mainly contains: reducing gas protection, inert gas shielding etc.In burner hearth, feed reducing gas, inert gas etc., the strong H2O of metalwork and oxidisability, CO2 and O2 are reduced contact or keep apart.For heating furnace, adopt the method protection cost of inert gas too high.General hope is to adopt reducing gas to protect.For fuel combustion, at high temperature (＞1000 ℃), H2O that produces in the combustion product and CO2 at high temperature can participate in the oxidation behavior of metalwork, and having only CO and H2 is reducibility gas.If in combustion process, keep the generation of the reducing gas (CO and H2) of q.s naturally, must allow fuel in combustion-supporting air quantity atmosphere seldom, carry out imperfect combustion.According to Theory of Combustion, imperfect combustion not only can cause the waste of fuel, and a large amount of unburned gas enter atmosphere and cause air pollution; And imperfect combustion, be easy to generate carbon black, suck heat storage and cause phenomenons such as heat storage obstruction after the meeting easily, finally cause system crash.In addition, imperfect combustion has also reduced flame temperature, the time that metalwork to be heated reaches processing temperature can occur to prolong greatly, even can not reach the phenomenon of processing temperature.In order to address the above problem, just must to combustion air and (or) fuel carries out high temperature preheating.This is for the unusual difficulty of combustion system of routine, and the involving great expense of pre-heating device, and service life is short; Conventional recuperative heater has adopted regenerative combustion technology; can with combustion air (or) fuel temperature is preheating to and is lower than 100～150 ℃ of furnace temperature, can produce thermal-flame after the burning, still; but still do not solve the few oxidation protection that is heated workpiece, especially for high heating value gas.
Though regenerative combustion technology provides a chance to us.Utilize the principle of heat storage type combustion, combustion air temperature can be preheating to and be lower than 100～150 ℃ of furnace temperature, head and shoulders above reach the air and the fuel preheat temperature of industrial furnace serviceability temperature.But because the mode of heat storage type combustion, phenomenon such as result in blockage easily finally causes system crash.
Obviously, the recuperative heater of prior art, be difficult to solve a series of problems that imperfect combustion brings comprehensively, gas around the metalwork to be heated mostly is the stronger gas of oxidability at high temperature such as H2O in the combustion product and CO2, can not reduce or reduce the oxidative phenomena of metalwork in burner hearth, the oxidative phenomena of metalwork is more serious.
Summary of the invention
The present invention is directed to the more serious deficiency of oxidative phenomena of metalwork to be heated in the heat accumulating burner capable burner hearth of the prior art, to provide in a kind of burner hearth be reducing atmosphere gas around the metalwork to be heated, can reduce the heat accumulation type low-oxidization combustion furnace of metalwork oxidation to be heated in the burner hearth greatly.
Technical scheme of the present invention: heat accumulation type low-oxidization heating furnace, comprise heat storage type combustion body of heater, burner hearth and heat-accumulating burner, it is characterized in that: the top area at burner hearth is provided with two or more air spray orifices, the air spray orifice is connected with the smoking pipeline with the combustion-supporting of heat-accumulating burner respectively, as combustion air and flue gas spray orifice and the passage into and out of burner hearth; Upper area at burner hearth is provided with one or more main fuel spray orifice, and the main fuel spray orifice acts as a fuel and enters the spray orifice of burner hearth; Lower region at burner hearth is provided with one or more fuel auxiliary spray hole, and the fuel auxiliary spray hole enters the spray orifice of burner hearth as auxiliary fuel;
Further feature is: the air spray orifice of heat-accumulating burner mutually to arranged in a crossed manner in the burner hearth both sides, main fuel spray orifice of the following layout of each air spray orifice.
The air spray orifice of burner is set in parallel in the burner hearth one or both sides, main fuel spray orifice of two air spray orifice intermediate arrangement.
The air spray orifice of burner is set in parallel in the burner hearth one or both sides with respect to fire door, arranges a main fuel spray orifice between two air spray orifices.
Heat accumulation type low-oxidization combustion furnace of the present invention with respect to existing heat accumulating type technology, has following characteristics:
1, stratified combustion, burner hearth upper strata be the air capacity that sprays into more than the fuel oxidation zone that sprays into, airborne oxygen is excessive, make fuel can be fully, completing combustion, improve the utilization ratio of fuel, guaranteed that metalwork to be heated arrives the time of processing temperature; Burner hearth lower floor only sprays into fuel, is enclosed in around the metalwork to be heated, and making metalwork is reducing gas on every side, forms unburnt reducing atmosphere zone; Help protecting metalwork not oxidized, reduce the oxidized phenomenon of metalwork to be heated in the burner hearth greatly.
2, fully burning.The burner hearth upper strata is an oxide regions, and burner hearth lower floor is a reduced zone; In alternative combustion process, imperfect combustion CO, H in the reducing zone
2Be pumped to zoneofoxidation, after burning with oxygen unnecessary in the zoneofoxidation, outside heat storage is discharged from stove; Make also can fully burn in the reducing zone more than fuel.Thereby effectively suppress the generation of pollution gas and carbon black.
Description of drawings
The present invention is described further below in conjunction with accompanying drawing:
Fig. 1 is a structure cutaway view of the present invention;
Fig. 2 is an another side structure cutaway view.
The specific embodiment
In Fig. 1,2,1-heat storage type combustion body of heater, 2-burner hearth, 3-air spray orifice, 4-main fuel spray orifice, 5-fuel auxiliary spray hole, 6-furnace lining masonry, the 7-body wall of dashing forward, 8-metalwork to be heated,
Heat accumulation type low-oxidization combustion furnace of the present invention comprises heat storage type combustion body of heater 1 and burner hearth 2, and burner hearth 2 is the position and the zones of placing and heating metalwork to be heated in the heat storage type combustion body of heater 1; Heat storage type combustion body of heater 1 is existing heat storage type combustion stove, at least comprise a cover heat-accumulating burner, heat storage, fuel supply pipe road, combustion air pipeline, smoke discharging pipe, control device etc., under control device control, when a side burner combustion, the opposite side burner carries out air-breathing smoke evacuation to the high-temperature flue gas in the burner hearth, two cover burner burnings are in turn treated the heating of metal part and are heated.Heat storage type combustion is as a kind of existing technology, and its technical characterstic, principle and burner block etc. as prior art, are not described further at this.
Improvement of the present invention is: the top area at burner hearth 2 is provided with two or more air spray orifices 3, a plurality of air spray orifices 3 are connected with the smoking pipeline with the combustion air pipeline of heat-accumulating burner respectively, enter the spray orifice passage of burner hearth 2 as the combustion air in the combustion air pipeline; Top area at burner hearth 2 is provided with one or more main fuel spray orifice 4, and a plurality of main fuel spray orifices 4 are connected with the fuel supply pipe road at the same time or separately, enters the spray orifice passage of burner hearth 2 as the fuel in the main fuel supply line.When stove is worked, be in all air spray orifices 3 of the burner of fired state, in burner hearth 2, spray into excessive air, the main fuel spray orifice 4 of this burner sprays into fuel in burner hearth 2, and fuel mixes on burner hearth 2 upper stratas with air and burns, heats metalwork to be heated; Simultaneously, all the air spray orifices 3 of burner that are in exhaust (smoke discharging) state are as the passing away of flue gases in the burner hearth 2, and high-temperature flue gas is through heat storage heat absorption back discharge burner hearth 2.
According to the difference of the size of the serviceability temperature of stove, metalwork to be heated, the output of stove etc., the air spray orifice 3 of burner and main fuel spray orifice 4 are also different in the layout on burner hearth 2 upper stratas.A kind of is that the air spray orifice 3 of burner is arranged in a crossed manner relatively in both sides, burner hearth 2 upper strata, mutually evenly, disposed at equal distance.Main fuel spray orifice 4 operated by rotary motion are below air spray orifice 3.Two kinds is that the air spray orifice 3 of burner is set in parallel in burner hearth one side, main fuel spray orifice 4 of two air spray orifice 3 intermediate arrangement.Three kinds is that the air spray orifice 3 of burner is set in parallel in burner hearth one side with respect to fire door, main fuel spray orifice 4 of two air spray orifice 3 intermediate arrangement.The interior temperature of abundant burning, burner hearth that helps fuel evenly raises.The air spray orifice 3 of two burners can be identical, also difference can be arranged.
At the top area of burner hearth 2 fuel quantity for 4 ejections of main fuel spray orifice, air excess, be oxide regions, fuel that main fuel spray orifice 4 sprays and the fuel gas that does not have completing combustion from lower floor's reduced zone have guaranteed that in the fully burning of this zone industrial furnace reaches serviceability temperature.
Lower region at burner hearth 2 is furnished with one or more fuel auxiliary spray hole 5, and fuel auxiliary spray hole 5 is connected with the fuel supply pipe road at the same time or separately, and the fuel in the supply line that acts as a fuel enters the spray orifice of burner hearth 2.Because metalwork 8 to be heated all is placed on the lower region (bottom) of burner hearth 2 usually, be equivalent to arrange around metalwork to be heated or on the surface a plurality of fuel auxiliary spray holes 5, fuel auxiliary spray hole 5 directly injects fuel into the metalwork surface, because the air capacity deficiency produces unburnt CO, H
2Deng reducing atmosphere gas, form unburnt reducing atmosphere district.Thereby greatly reduce the oxygenation efficiency of metalwork 8 to be heated.
For the upper strata oxide regions of strengthening burner hearth 2 and the differentiation of lower floor's reduced zone; make it protect the not oxidized effect of metalwork to be heated 8 obvious; layering wall 7 is set on furnace lining masonry 6, and layering wall 7 protrudes in burner hearth 2, and burner hearth 2 is separated into tangible top area and lower region.During use, top area is an oxide regions because of excessive air is arranged, and lower region is the reducing atmosphere zone because of the anoxic burn incompletely.
The course of work of heat accumulation type low-oxidization heating furnace of the present invention: when under control device control, working, be in the air spray orifice 3 of the burner of fired state, in burner hearth 2 top area, spray into excessive air, the main fuel spray orifice 4 of this burner sprays into fuel in burner hearth 2, fuel mixes with air and burns; At this moment, be in the air spray orifice 3 of burner of exhaust (smoke discharging) state as the passing away of flue gases in the burner hearth 2, through heat storage heat absorption back discharge burner hearth 2.Because of air excess, full combustion of fuel forms the oxidizing atmosphere zone, has guaranteed that metalwork to be heated arrives the time of processing temperature; Simultaneously, the fuel auxiliary spray hole 5 of the lower area setting of burner hearth 2 sprays into fuel always in the lower layer zone of burner hearth 2, the fuel package that fuel auxiliary spray hole 5 sprays into is trapped among around the metalwork 8 to be heated, because the air capacity deficiency, non-complete combustion of fuel forms the reducing atmosphere zone.This reducing atmosphere zone can reduce the oxidized phenomenon of metalwork to be heated in the burner hearth greatly.
Claims (7)
1, heat accumulation type low-oxidization heating furnace, comprise heat storage type combustion body of heater (1) and burner hearth (2), it is characterized in that: the top area at burner hearth (2) is provided with plural air spray orifice (3), air spray orifice (3) is connected with the combustion air pipeline of burner respectively, enters the passage of burner hearth (2) as combustion air; Top area at burner hearth (2) is provided with more than one main fuel spray orifice (4), and main fuel spray orifice (4) acts as a fuel and enters the passage of burner hearth (2); Lower region at burner hearth (2) is provided with more than one fuel auxiliary spray hole (5), and fuel auxiliary spray hole (5) acts as a fuel and enters the passage of burner hearth (2).
2, heat accumulation type low-oxidization heating furnace according to claim 1 is characterized in that: the air spray orifice (3) of two burners is arranged in a crossed manner mutually, and air spray orifice (3) next door of a burner is the air spray orifice (3) of another burner; The air spray orifice (3) of burner is arranged in a crossed manner relatively in burner hearth (2) both sides.
3, heat accumulation type low-oxidization heating furnace according to claim 1 is characterized in that: the air spray orifice (3) of two burners is set in parallel in burner hearth (2) one sides with respect to fire door.
4, according to the arbitrary described heat accumulation type low-oxidization heating furnace of claim 1 to 3, it is characterized in that: even mutually, the equidistant setting of air spray orifice (3) of two burners.
5, heat accumulation type low-oxidization heating furnace according to claim 2 is characterized in that: main fuel spray orifice (4) be arranged on air spray orifice (3) below.
6, heat accumulation type low-oxidization heating furnace according to claim 3 is characterized in that: arrange a main fuel spray orifice (4) between two air spray orifices (3).
7, according to the arbitrary described heat accumulation type low-oxidization heating furnace of claim 1 to 3, it is characterized in that: layering wall (7) is set on furnace lining masonry (6), layering wall (7) protrudes in burner hearth (2), and burner hearth (2) is separated into upper strata oxide regions and lower floor's reduced zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100782155A CN100478611C (en) | 2007-02-13 | 2007-02-13 | Heat accumulation type low-oxidization heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100782155A CN100478611C (en) | 2007-02-13 | 2007-02-13 | Heat accumulation type low-oxidization heating furnace |
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| Publication Number | Publication Date |
|---|---|
| CN101012927A CN101012927A (en) | 2007-08-08 |
| CN100478611C true CN100478611C (en) | 2009-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100782155A Expired - Fee Related CN100478611C (en) | 2007-02-13 | 2007-02-13 | Heat accumulation type low-oxidization heating furnace |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102364280A (en) * | 2011-01-10 | 2012-02-29 | 东北大学 | Secondary combustion reduction heating furnace for layered furnace gas |
| CN103468281B (en) * | 2013-08-29 | 2015-07-01 | 中钢集团鞍山热能研究院有限公司 | Method and device for low temperature carbonization and pyrolysis of low-rank coal and oil shale |
| CN107620953A (en) * | 2016-07-15 | 2018-01-23 | 潘以泰 | A kind of heat accumulating burner |
| CN106091688B (en) * | 2016-07-27 | 2019-01-08 | 浙江品创知识产权服务有限公司 | It is a kind of for producing the heating furnace of energy-saving material |
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Owner name: CHONGQING VAUX TECHNOLOGY DEVELOPMENT CO., LTD. Free format text: FORMER OWNER: GU XIANGTAO Effective date: 20090807 |
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Effective date of registration: 20090807 Address after: High Kam building, No. 18 Chongqing Jiulongpo Shiqiaopu Yuzhou Road No. 20-2 Patentee after: Chongqing Waxman Technology Development Co., Ltd. Address before: High Kam building, No. 18 Chongqing Jiulongpo Shiqiaopu Yuzhou Road No. 20-2 Patentee before: Gu Xiangtao |
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Address after: High Kam No. 18 building, 400039 Chongqing Jiulongpo Yuzhou Road No. 20-2 Patentee after: Chongqing Aokeqi Technology Co., Ltd. Address before: High Kam No. 18 building, 400039 Chongqing Jiulongpo District Shiqiaopu Yuzhou Road No. 20-2 Patentee before: Chongqing Waxman Technology Development Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090415 Termination date: 20200213 |
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| CF01 | Termination of patent right due to non-payment of annual fee |