CN102607022A - Energy-saving and environment-friendly regenerative high-temperature air combustor - Google Patents
Energy-saving and environment-friendly regenerative high-temperature air combustor Download PDFInfo
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- CN102607022A CN102607022A CN2012100739692A CN201210073969A CN102607022A CN 102607022 A CN102607022 A CN 102607022A CN 2012100739692 A CN2012100739692 A CN 2012100739692A CN 201210073969 A CN201210073969 A CN 201210073969A CN 102607022 A CN102607022 A CN 102607022A
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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
Abstract
The invention discloses an energy-saving and environment-friendly regenerative high-temperature air combustor, which is a piece of special combustion equipment matched with an industrial furnace adopting a high-temperature air combustion (HTAC) technology. The combustor effectively recovers smoke afterheat by utilizing a heat storage technology and pre-heats combustion-supporting air; combustion at various work conditions can be organized by fuels supplied at three times, so that the heating requirement is met. The fuel supplied firstly is used for igniting and stabilizing combustion; the fuel supplied secondly is used for low-temperature common combustion and short-time high-temperature flame combustion (HTFC), and the fuel supplied thirdly is distributed around an outlet of a heat storage chamber and jet into high-temperature oxygen-deficient airflow for organizing real high-temperature air combustion (HTAC). The combustor disclosed by the invention has both the low-temperature heating function of a common combustor and the high-temperature heating function of a high-temperature air combustor. Multi-function of one machine accords with national conditions in our country for technical renovation of newly built devices and old devices, and significant effects for efficiently saving energy and protecting environment can be achieved. Therefore, application of the combustion technology is favorable for improving technical level and energy utilization level of the industrial furnace in our country.
Description
Technical field
The present invention relates to a kind of energy saving and environment friendly heat accumulating type high-temperature air burning device, this equipment belongs to the Industrial Stoves field, combustion technology and equipment.
Background technology
Along with the continuous progress of industrial technology, resource (the particularly energy) crisis and sustainable development are pendulum the most urgent problems in face of people, need to be resolved hurrily.At China's Industrial Stoves are energy consumption rich anies influential family, and energy consumption accounts for 40% of industrial energy consumption, Industrial Stoves evenly heat utilization rate generally lower (having only about 20%), and the average energy loss-rate developed country of product exceeds 40%.Improve the rate of recovery of China's Industrial Stoves fume afterheat, the utilization rate of fuel, realize that the goal task of energy-saving and emission-reduction is very arduous; Simultaneously, the energy-saving and cost-reducing potentiality of Industrial Stoves also are very huge.
Following several stages has been experienced in the development of Industrial Stoves power-saving technology:
Phase I: fume afterheat does not utilize the stage.Industrial Stoves used heat does not utilize, flue gas directly discharges early stage (now also some), and the exhaust gas temperature of kiln afterbody is very high, and the heat loss that flue gas is taken away is very big, and the heat utilization efficiency of kiln is below 30%.With the shuttle-type kiln is example: the highest firing temperature is 1,350-1, and 650 ℃, the exhanst gas outlet temperature is 1,100-1,400 ℃, cause the waste of a large amount of valuable heat energy, seriously hindered the use and the technical development of shuttle-type kiln.
Second stage: fume afterheat is elementary to utilize the stage.For reducing the thermal loss that flue gas is taken away, play people the seventies in 20th century and install part of waste heat, the warm-up combustion-supporting air that heat reclaim unit (dividing wall type heat exchanger) reclaims flue gas additional at the kiln afterbody.Adopt this way can be with more than the preheating temperature to 200 of combustion air ℃, the combustion-supporting flame burning temperature that improves of hot blast, the heat utilization efficiency of kiln also is significantly improved (can reach 50%), but through the exhaust temperature of flue gas behind the heat exchanger also more than 500 ℃.
Because receive the restriction in heat exchanger materials (generally adopt metal material and ceramic material, the former short in life-span, latter's equipment is huge, cost is high, maintenance difficult) and hot blast conveying pipe road, preheated air temperature is difficult to surpass 800 ℃, the recovery of high-temperature residual heat is difficult to realize.
Phase III: heat accumulating type high-temperature flame (HTFC) stage.For solving the not high problem of preheat temperature; A brand-new combustion technology occurred at combustion field the eighties in 20th century---heat accumulating type high-temperature flame (High Temperature Flame Combustion-HTFC) technology (also have and be called " first generation HTAC "); The alternation under accumulation of heat and heat release state of regenerator that this techniques make use is paired or heat-storage type burner; The warm-up combustion-supporting air when waste heat of flue gas is carried out high efficiente callback; The preheat temperature of combustion air is up to 1,000 ℃, far above the preheat temperature that adopts dividing wall type heat exchanger; Fuel sprayed into form HTFC in the high temperature air, strengthened heat exchange in the stove, shorten heat time heating time, improved the output of product; HTFC improves the efficiency of combustion of fuel, solved igniting when using low calorie fuels difficult, take off problem such as fire.
Adopt the HTFC technology can smog discharge temperature be reduced to below 150 ℃, greatly reduced the thermal loss of smoke evacuation, the heat utilization efficiency of kiln increases substantially, and energy-saving effect is obvious.
According to 100 ℃ of the every risings of the temperature-averaging of Industrial Stoves combustion air, but fuel saving about 5%; Perhaps the average every reduction of exhaust gas temperature is 100 ℃, but about 5.5% calculating of fuel saving, and the HTFC technology improves more than 25% than heat exchanger recovery waste heat technical energy saving rate.
; After combustion air temperature improves; The volume in thermal-flame district is more and more littler, and the temperature of flame kernel is also increasingly high, has local high-temperature region in the burner hearth; Very easily cause the local burning of heating product influence the problem of product quality, also have influence on the service life of the interior hardware of Industrial Stoves refractory material and stove; Simultaneously, the raising of flame temperature causes the growing amount of NOx sharply to increase (even can to reach 10
3More than the PPM), atmospheric environment has been caused serious harm.
Stage: heat accumulating type high-temperature air burning (HTAC) stage.For solving problems such as local burning and environment protection emission; Early 1990s comparatively perfect heat accumulating type high-temperature air burning (High Temperature Air Combustion-HTAC) technology (also have and be called " second generation HTAC ") occurred and has claimed flameless combustion (Flameless Combustion) technology again; The HTAC technology is basic identical with the operation principle and the technological process of HTFC technology; The time that sprays into that difference is fuel is with to spray into the position different: in the HTAC technology; Get into burner hearth after entrainmenting a large amount of flue gases through the high temperature air after the heat storage preheating, form high temperature oxygen deprivation (oxygen content can be low to moderate 2%) air-flow, in high temperature oxygen deprivation air-flow, spray into fuel; Fuel acutely burns and forms and conventional diffusion flame, the diverse novel flame of premixed flame; Flame does not have tangible interface such as mist to spread in furnace cavity, and combustion intensity is strengthened greatly, has strengthened heat exchange in the stove, has shortened heat time heating time; The combustion zone does not have tangible flame kernel, uniform distribution of temperature field, and average ignition temperature is low than the temperature of localized hyperthermia's flame combustion, improves the output and the quality of product effectively, has also suppressed the growing amount of NOx and dioxin simultaneously; Rapid cooling during the discharging flue gas can effectively stop the synthetic once more of dioxin, and the discharge capacity of NOx and dioxin significantly reduces in the flue gas.In addition, do not have the flame of high-velocity combustion in the burner, fuel is to greatly reduce combustion noise in the furnace cavity internal combustion.
The HTAC technology energy-saving effect technological than HTFC is more remarkable, and heating quality is higher, and the advantage of protection environment is more outstanding.
The patent No. is 200420070760.1 utility model patent, has introduced a kind of swinging heat-accumulation combustor, and the Fuel lance of this burner is arranged on the central axis; Heat storage around the spray gun is by even separated into two parts; This two parts heat storage is selected accumulation of heat and state heated through rotating disk, and the fuel of this burner is surrounded by the high temperature air of its outside half cycle during operation, when fuel and high temperature air spray into burner hearth together; In a single day fuel and the high temperature air after the heat storage heating meet strong burning will take place; Form HTFC (genus oxygen-enriched combusting), because fuel does not feed oxygen-depleted zone from the another one passage, fuel or air all do not have the classification input yet; Therefore the growing amount of NOx can sharply increase, and can't realize the described HTAC of inventor (High Temperature Air Combustion)." the high-temperature air burning system " that be made up of this burner also can only be the HTFC system, and its general effect energy-conservation and environmental protection can not show a candle to HTAC.
In fact; China greatly relevant heat-storage type burner, heat accumulating type Industrial Stoves patent all with fuel with high temperature air through same spout, send into burner hearth " HTFC is technological "; Be not " the HTAC technology " that the inventor describes or expects, just repeated no more here.
The patent No. is 200420020783.1 utility model patent; Introduced a kind of split type high wind-warm syndrome heat-accumulation combustor, the regenerator of this invention burner is separated setting with burner, and the burner main frame is in normally open; Regenerator is by four-way switching valve control switching-over work; System only needs the fiery device of a cover inspection can satisfy the needs of safety guarantee, has improved reliability, has reduced cost.
" the high wind-warm syndrome Regenerative Combustion Technology " that can realize high waste heat recovery and low emitting nitride that the described initial stage nineties of this patent grows up is exactly the HTAC technology.
Burner is a burner; " split type high wind-warm syndrome heat-accumulation combustor " in fact is exactly to separate " regenerator " and " burner " that is provided with; Since adopted regenerator just to need not to be equipped with again burner in the HTAC technology, otherwise can make system complicated more, also will increase cost.
Regenerator (supporting have Fuel lance) or heat-storage type burner dual mode are adopted in the accumulation of heat of HTAC technology.
The HTAC technology of the similar employing regenerator of this utility model (supporting have Fuel lance); Fuel lance in the HTAC technology should be arranged near the checker port, and the fuel of guaranteeing to be sprayed can both be entrainmented by high temperature air stream with the flue gas in the stove together brings the burning of high temperature oxygen-depleted zone into.And the Fuel lance of this utility model is placed in the middle of two regenerator, and the fuel of spray gun ejection can not all be siphoned away by the high temperature air of adjacent any checker port stream, thereby can not organize HTAC completely; Near the Fuel lance outlet, the fuel enrichment district will be occurred,, diffusion flame (naked light burning) will be formed at the fuel enrichment area edge along with ambient oxygen diffuses into the fuel enrichment district.Simultaneously; The fuel enrichment district very easily is brought into the regenerator of opposite side without burnt fuel; This part fuel be if burning then can cause the heat storage burning and damage in advance in this regenerator, if with flue gas directly discharge can cause fuel waste, bring harm to environment.
The content of invention
The energy saving and environment friendly heat accumulating type high-temperature air burning device of the present invention can be organized real HTAC (High Temperature Air Combustion), has solved above-mentioned problem well; This burner is special in adopting the supporting combustion apparatus of Industrial Stoves of HTAC technology.
Burner of the present invention is made up of housing, air/exhaust gases passes, Fuel lance, igniting and flame monitoring apparatus.The built-in heat storage of housing is used to reclaim fume afterheat, warm-up combustion-supporting air; Air/exhaust gases passes is used to provides burning wind and discharging flue gas; The setting of Fuel lance is a key technology of the present invention, and the fuel of burner divides three supplies: i.e. primary fuel, secondary fuel and three fuel; Igniting and flame monitoring apparatus are the combustion completion of guaranteeing after low-temperature zone commutates.
The primary fuel of this burner is similar with the fuel supply of the preheated air formula burner of routine with secondary fuel: primary fuel is used for igniting and fires with steady, guarantees the safety of low-temperature zone reversing combustion; Secondary fuel is used to the conventional burning of low temperature and the HTFC of short time of the section of intensification, heats up to guarantee that burner hearth is stable.Three fuel (rarely found in the normal burner) are to be specifically designed to organize HTAC; The spray gun of three fuel is arranged in around the checker port; Three fuel is entrainmented by high temperature air stream with flue gas on every side; All bring high temperature oxygen-depleted zone burning into, realize real HTAC: the flame of diffuse type, even temperature field distribution, suppressed the growing amount of NOx and dioxin effectively.Really reach target energy-efficient, the protection environment.
Energy saving and environment friendly heat accumulating type high-temperature air burning utensil has conventional multiple functions such as Cryogenic air burner, preheating air combustion device and high-temperature air burning device; " one-machine-multi-function " meets the national conditions of China, thereby suitable fully for igniting, intensification, the soak of various industrial heating kilns, each stage such as cool; Be used for the newly-built equipment of Industrial Stoves and the technological transformation of used equipment, can both receive remarkable result energy-saving and cost-reducing, the protection environment.When can bring remarkable economic efficiency and social benefit, also help the technical merit and the using energy source level that improve China's Industrial Stoves for us.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain.
Fig. 1 is one embodiment of the present invention sketch map
Fig. 2 is the another embodiment of the invention sketch map
The specific embodiment
Referring to Fig. 1, Fig. 2, energy saving and environment friendly heat accumulating type high-temperature air burning device comprises: housing 1, heat storage 2, air/exhaust gases passes 3, Fuel lance 4, igniter 5 and flame monitoring apparatus 6.
Housing 1 has fire-resistant and insulation material by steel plate making, inside lining, with radiation loss, the reduction hull-skin temperature that reduces burner; Housing 1 is provided with art and craft door and the glory hole that heat storage is changed cleaning.
Fuel lance 4 is decided according to employed fuel: when using liquid fuel, select atomization of liquid spray gun for use, when using gases fuel, select gas spray gun for use.
Fuel lance 4 Fen San district multiple guns are arranged as the burning heating fuel is provided: primary fuel spray gun 4-1 is used for igniting and steady combustion; Secondary fuel spray gun 4-2 is used to the conventional burning of low temperature and the short time high temperature flame combustion (HTFC) of the section of intensification; Three times Fuel lance 4-3 is used to organize HTAC (High Temperature Air Combustion), can bring into play the advantage of HTAC better.
Igniter 5 is made up of ignitor and igniter; Flame monitoring apparatus 6 is made up of flame probe and flame monitor.Igniter, flame monitor can be selected discrete equipment for use, also can select the burner control appliance of igniting, flame monitoring one for use.Under the situation that is provided with the primary fuel spray gun, flame monitoring apparatus 6 can be selected ionic formula or ultraviolet formula or flame pulsation formula for use; Under the situation that the primary fuel spray gun is not set, flame monitoring apparatus 6 can only be selected ionic formula for use, guarantees the security of operation of heating kiln low-temperature zone.
Fig. 1, Fig. 2 are for ease of carrying out detailed explanation to the present invention, and unrestricted practical range of the present invention.
Claims (4)
1. an energy saving and environment friendly heat accumulating type high-temperature air burning device comprises housing (1), heat storage (2), air and exhaust gases passes (3), Fuel lance (4), igniter (5) and flame monitoring apparatus (6); It is characterized in that: described housing (1) is processed by steel plate, refractory material and insulation material; Described heat storage (2) is made up of ceramic honey comb or fire-resistant bead for the waste heat that reclaims high-temperature flue gas, the core component of warm-up combustion-supporting air; Described air and exhaust gases passes (3) are the passage of combustion air and fume emission; Described Fuel lance (4) is different because of the fuel that uses, and when using liquid fuel, selects atomization of liquid spray gun for use, when using gases fuel, selects gas spray gun for use; Described igniter (5) is made up of ignitor and igniter; Described flame monitoring apparatus (6) is made up of flame probe and flame monitor.
2. energy saving and environment friendly heat accumulating type high-temperature air burning device according to claim 1; It is characterized in that: described heat storage (2) selects for use ceramic honey comb or fire-resistant bead or ceramic honey comb and two kinds of materials of fire-resistant bead to use simultaneously, but when two kinds of materials use simultaneously the heat storage separated into two parts: the low-temperature heat accumulating section adopts ceramic honey comb, high-temperature heat accumulation section to adopt fire-resistant bead.
3. energy saving and environment friendly heat accumulating type high-temperature air burning device according to claim 1 is characterized in that: the mode that described Fuel lance (4) adopts multiple gun to arrange is divided supply fuel three times, and primary fuel spray gun (4-1) is used for igniting and steady combustion; Secondary fuel spray gun (4-2) is used to the conventional burning of low temperature and the short time high temperature flame combustion (HTFC) of the section of intensification; Three Fuel lances (4-3) are used for tissue hyperthermia air burning (HTAC), bring into play the advantage that HTAC is energy-efficient, protect environment better.
4. energy saving and environment friendly heat accumulating type high-temperature air burning device according to claim 1 is characterized in that: described igniter (5) and flame monitoring apparatus (6) can be selected discrete equipment for use, also can select the burner control appliance of igniting and flame monitoring one for use; Under the situation that is provided with the primary fuel spray gun, can adopt ionic formula or ultraviolet formula or flame pulsation formula flame probe and flame detector; Under the situation that the primary fuel spray gun is not set, can only adopt ionic formula flame probe and flame detector, guarantee the security of operation of kiln low-temperature heat section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100739692A CN102607022A (en) | 2012-03-20 | 2012-03-20 | Energy-saving and environment-friendly regenerative high-temperature air combustor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100739692A CN102607022A (en) | 2012-03-20 | 2012-03-20 | Energy-saving and environment-friendly regenerative high-temperature air combustor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267278A (en) * | 2013-04-26 | 2013-08-28 | 武汉长天福瑞达科技有限公司 | Bio-fuel burning machine |
| CN104036681A (en) * | 2014-06-18 | 2014-09-10 | 中国科学技术大学 | Fire experimental device used for gas uniform combustion |
| CN104089286A (en) * | 2013-04-01 | 2014-10-08 | 郑州经纬科技实业有限公司 | High-temperature flue gas roasting burner and aluminium electrolytic tank using same |
| CN105402732A (en) * | 2015-12-09 | 2016-03-16 | 北京神雾环境能源科技集团股份有限公司 | Reductive smelting heat-accumulation type combustion system and smelting method using same |
| CN109737395A (en) * | 2019-01-25 | 2019-05-10 | 新冶高科技集团有限公司 | A kind of alcohol-based fuel heat-storage type burner |
| CN109751599A (en) * | 2017-11-06 | 2019-05-14 | 日本碍子株式会社 | Heat-storage type burner, industrial furnace and the manufacturing method for being burnt into product |
| CN111197737A (en) * | 2018-11-20 | 2020-05-26 | 中外炉工业株式会社 | Industrial furnace and combustion control method for industrial furnace |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1167229A (en) * | 1996-02-14 | 1997-12-10 | 日本钢管株式会社 | Burner and combustion method in furnace |
| CN1109845C (en) * | 1994-07-18 | 2003-05-28 | 丰田自动车株式会社 | Low NOx burner |
-
2012
- 2012-03-20 CN CN2012100739692A patent/CN102607022A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109845C (en) * | 1994-07-18 | 2003-05-28 | 丰田自动车株式会社 | Low NOx burner |
| CN1167229A (en) * | 1996-02-14 | 1997-12-10 | 日本钢管株式会社 | Burner and combustion method in furnace |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089286A (en) * | 2013-04-01 | 2014-10-08 | 郑州经纬科技实业有限公司 | High-temperature flue gas roasting burner and aluminium electrolytic tank using same |
| CN103267278A (en) * | 2013-04-26 | 2013-08-28 | 武汉长天福瑞达科技有限公司 | Bio-fuel burning machine |
| CN103267278B (en) * | 2013-04-26 | 2015-07-22 | 武汉长天福瑞达科技有限公司 | Bio-fuel burning machine |
| CN104036681A (en) * | 2014-06-18 | 2014-09-10 | 中国科学技术大学 | Fire experimental device used for gas uniform combustion |
| CN105402732A (en) * | 2015-12-09 | 2016-03-16 | 北京神雾环境能源科技集团股份有限公司 | Reductive smelting heat-accumulation type combustion system and smelting method using same |
| CN105402732B (en) * | 2015-12-09 | 2019-03-29 | 神雾科技集团股份有限公司 | Reducing and smelting regenerative combustion system and the method smelted using the system |
| CN109751599A (en) * | 2017-11-06 | 2019-05-14 | 日本碍子株式会社 | Heat-storage type burner, industrial furnace and the manufacturing method for being burnt into product |
| CN111197737A (en) * | 2018-11-20 | 2020-05-26 | 中外炉工业株式会社 | Industrial furnace and combustion control method for industrial furnace |
| CN111197737B (en) * | 2018-11-20 | 2022-02-22 | 中外炉工业株式会社 | Industrial furnace and combustion control method for industrial furnace |
| CN109737395A (en) * | 2019-01-25 | 2019-05-10 | 新冶高科技集团有限公司 | A kind of alcohol-based fuel heat-storage type burner |
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Application publication date: 20120725 |