CN2769705Y - Local aerating and combustion aiding device for industrial kiln - Google Patents
Local aerating and combustion aiding device for industrial kiln Download PDFInfo
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- CN2769705Y CN2769705Y CNU2004200140051U CN200420014005U CN2769705Y CN 2769705 Y CN2769705 Y CN 2769705Y CN U2004200140051 U CNU2004200140051 U CN U2004200140051U CN 200420014005 U CN200420014005 U CN 200420014005U CN 2769705 Y CN2769705 Y CN 2769705Y
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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 utility model relates to a local oxygen-increasing combustion-aiding device for an industrial kiln. The device is arranged beside the original kiln, and comprises an oxygen source, an oxygen-enriching preheater, a special oxygen-enriching nozzle and an adjusting controlling device, wherein the oxygen-enriching preheater and the oxygen-enriching nozzle are in contact with the kiln. The utility model is suitable for various fuel and industrial kilns, uses a local oxygen-enriching nozzle, the special oxygen-enriching nozzle, and a high new technology which is matched with the industrial kilns, products and fuel, and the high new technology comprises gradient combustion, symmetrical combustion, alpha type combustion, S type combustion, four-corner combustion, delay combustion, staged combustion, etc. The oxygen-enriching quantity is only 0.5 to 15 percent of the quantity of the combustion-aiding wind of the kiln, and the fuel can be sufficiently and completely burnt in time under the less combustion-aiding wind so as to achieve the goals of energy saving, improvement of kiln combination property and less pollution.
Description
Affiliated technical field
The utility model relates to a kind of partial oxygenation combustion-supporting apparatus that is used for industrial furnace, is applicable to that various fuel comprise natural gas, liquefied gas, coal gas, coal, coal dust, water-coal-slurry, heavy oil, diesel oil, kerosene, residual oil etc. and most of industrial furnaces such as coal-powder boiler, CFBB, spreader stoker boiler, fluidized bed furnace, oil burner, gas furnace, chain furnace, heating furnace, notes vapour stove, incinerator, heating agent stove, unit kiln, horseshoe flame furnace, cross fire furnace, double arched kiln, furnace and cement kiln etc.
Background technology
At present, what the general industry stove adopted all is that normal air is combustion-supporting, and this has many deficiencies.Because only contain the oxygen less than 21% in the air, all the other are inert gas, not only do not participate in combustion-supportingly, absorb a large amount of heats on the contrary, thereby reduce the performance of industrial furnace and efficient etc.Have only Shen Guang woods etc. once to propose the local oxygen and aiding combustion method (CN97104465.1) of a kind of industrial heating furnace film oxygen enriching in early days, it is to utilize embrane method to prepare oxygen rich gas instead of part air, it is characterized in that it being to adopt the local oxygen enriching method, promptly use the oxygen rich gas of required air quantity 1-3%, concentrate local oxygen enriching, oxygen-enriched air is sent into heat exchanger by booster fan and is improved gas temperature, again by by being arranged in the combustion furnace, with fuel bed closely (3-25cm) direct directive fuel bed of nozzle of being provided with carry out combustion-supporting.This patent has following deficiency:
1. oxygen source only is an embrane method, and in fact oxygen source also has VPSA method, Deep Cooling Method, chemical method and industry byproduct etc.;
2. the local oxygen enriching amount is narrow, promptly uses the oxygen rich gas of required air quantity 1-3%, and is in fact can scope wideer, as 0.5-15%, mainly is to see under what ratio and what condition comprehensive benefit the best;
Booster fan be provided with unreasonable, the one, increase power consumption; The 2nd, need regular maintenance, in fact in most of the cases can cancel;
4. nozzle is provided with limitation;
5. the scope of Ying Yonging is narrow.
Summary of the invention
In order to overcome the deficiency of the existing combustion-supporting mode of industrial furnace, the utility model provides a kind of partial oxygenation combustion-supporting apparatus that is used for industrial furnace.This device not only will with couplings such as industrial furnace, product and fuel, to be the coupling of local oxygen enriching burning-aid technology also with corresponding " gradient burning ", " symmetry burning ", " burning of α type ", " burning of S type ", " corner firing ", " postponement is burnt " and new and high technologies such as " fractional combustions ".
" gradient burning " technology in the local oxygen enriching burning-aid technology that the utility model proposes aims at various glass furnace exploitations, and it is applicable to unit kiln, horseshoe flame furnace, double arched kiln and cross fire furnace etc." gradient burning " technology is that to make the flame that sprays in the kiln reach gradient combustion-supporting: make the flame bottom owing to the oxygen-enriched combustion-supporting effect elevates the temperature.The temperature distribution gradient in flame cross section, the bottom (near metal level) that is flame is the highest temperature, the middle part is the completing combustion layer, the upper temp of flame is lower than the middle part, but be the completing combustion layer also, be that flame kernel moves down as far as possible, temperature of glass liquid is improved as far as possible, and arch top temperature be low as far as possible; " symmetry burning " technology is applicable to other Industrial Stoves of fuel oil and combustion gas, and it does not change the flame profile of original kiln, has just improved flame temperature and blackness, and radiant heat significantly improves; Technology such as " burning of α type ", " burning of S type ", " corner firing ", " postponing burning ", " fractional combustion " are applicable to the kiln of buring solid fuel, former three mainly is the characteristic that is used for strengthening original kiln, make the time of staying of fuel in burner hearth longer and under less combustion air, fully burning in burner hearth fully in time, thereby reach energy-conservation and raising kiln combination property purpose, then both are mainly used to reduce nitrogen oxide and energy-conservation, generally are used for coal-powder boiler.
The technical scheme that its technical problem that solves the utility model adopts is: at the other cover partial oxygenation combustion-supporting apparatus that adds of former kiln.This device comprises oxygen source, oxygen enrichment preheater, special-purpose oxygen enrichment nozzle and adjustment control four major parts.Only the oxygen enrichment preheater contacts with kiln with special-purpose oxygen enrichment nozzle, and furnace performance and safety are had no effect (derives from user's paper: application .2001 3rd phase " membrane science and technology " of membrane oxygen enrichment technology on coal-burning boiler).Wherein the oxygen-rich concentration that oxygen source provided is generally 22-98.5%, Rich Oxygen Amount and only is the 0.5-15% of the combustion-supporting required air quantity of kiln, as people having the same habits' steel will be added on the blade, many plays side effect sometimes, as NO
XAdd etc.Concrete ratio need be optimized according to actual conditions, makes comprehensive benefit the best.Common oxygen source can add air mixed stable voltage control device by embrane method, pressure swing adsorption method (VPSA or PSA), Deep Cooling Method (oxygenerator), chemical method and industry byproduct and obtain; The oxygen enrichment preheater improves the temperature of oxygen-enriched air by the used heat that utilizes kiln, and general temperature can improve 100-700 ℃; Adjustment control is used for regulating and controlling the distribution and the commutation of flow, concentration, temperature, pressure and the Rich Oxygen Amount of oxygen-enriched air; Special-purpose oxygen enrichment nozzle then is that oxygen enrichment is delivered to the most aerobic place of kiln.Key is the design and installation of special-purpose oxygen enrichment nozzle, the local oxygen enriching burning-aid technology can be mated with corresponding kiln, fuel and product: the position of special-purpose oxygen enrichment nozzle is for glass furnace, generally be placed on the bottom of fuel nozzle, and must commutate simultaneously with fuel nozzle in case of necessity; When fuel nozzle being arranged for other Industrial Stoves, can be placed on this nozzle upper and lower, left and right, before or after, need symmetric arrangement; If Industrial Stoves do not have nozzle, then the oxygen enrichment nozzle can be placed on (spreader stoker boiler, chain furnace) or secondary wind under the traveling-grate stoker, tertiary air position or four jiaos or its upper and lower, left and right (coal-powder boiler); Shape can be circle, annular or flat; Material can be metal, nonmetal or special material such as ceramic steel pipe; Angle of flare is generally between ± 60 °; The oxygen enrichment linear speed is generally 10-200m/s; Oxygen enrichment pressure is generally at 2-50KPa, main and couplings such as the type of furnace, the working of a furnace, fuel and product.Make fuel under less combustion air, burning fully fully in time, thus reaching energy-conservation, improve kiln combination property and purpose such as pollution abatement fundamentally, general some months just can be regained fully invested.
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a kind of partial oxygenation combustion-supporting apparatus schematic diagram that is used for industrial furnace.
1. oxygen sources among the figure, 2. oxygen enrichment preheater, 3. special-purpose oxygen enrichment nozzle, 4. adjustment control, 5. kiln.
Fig. 2 is a kind of oxygen source schematic diagram of film oxygen enriching device.
6. air cleaners among the figure, 7. ventilation blower, 8. water-ring vacuum pump, 9. control valve, 10. vacuum meter, 11. film oxygen-enriched generators, 12. moisture traps, 13. water circulation systems.
Embodiment 1, and kiln is coal-fired chain furnace, and accompanying drawing 1 and accompanying drawing 2 are seen in technological process respectively.
Approximately being Rich Oxygen Amount 7-11 air doubly enters film oxygen-enriched generator (11) and separates through being pressurized to 4000 ± 1000Pa by ventilation blower (7) behind the above dust of air cleaner (6) elimination 0.1 μ, the Rich Oxygen Amount that obtains accounts for the 0.7-3.8% of combustion air volume, the oxygen-enriched air of oxygen-rich concentration 29 ± 2% is regulated pressure through control valve (10) and is controlled oxygen-rich concentration and flow, vacuum meter (10) shows pressure, extract out by water-ring vacuum pump (8), pass through moisture trap (12) again and separate the back by oxygen enrichment preheater (2), after utilizing the waste heat of boiler smoke to be preheating to 100-300 ℃, [if rear arch has been arranged secondary wind, then special-purpose oxygen enrichment nozzle (3) can be arranged in face arch to send oxygen-enriched air the rear arch of boiler (5) to by special-purpose oxygen enrichment nozzle (3) at last, side wall or four jiaos].Special-purpose oxygen enrichment nozzle (3) approximately 6-10 props up, and material is the heat resisting pipe of Φ 30 ± 10MM, and head is a flat, 40 ± 15 ° of angles of flare, and downward-sloping 30 ± 20 °, the about 70 ± 30m/s of oxygen enrichment linear speed, the general installation needs blowing out 2-5 days.
After feeding oxygen enrichment, the combustion air volume of 20 tons of coal-fired chain furnaces approximately descends 1/3 to 1/9, and the air quantity of each air compartment all will be transferred to the best, general " burning of α type " or " burning of the S type " technology that adopts is strengthened flame characteristics, make fuel time of staying in burner hearth longer, obtain completing combustion, thereby emit more efficient heat, the flame kernel temperature can improve 50-150 ℃ simultaneously, has strengthened flame rigidity.Compare with normal air is combustion-supporting, the general 5-18% that on average economizes on coal, the annual economize on electricity of ventilation blower and air-introduced machine 5-15%, quantity of steam is regulated more flexible, generally can improve 5-20%, but also have stable boiler working condition, reduces effects such as atmosphere pollution, prolonged boiler life-span.
Embodiment 2, and kiln is a fuel oil unit kiln of producing glass fibre
Glass fibre is the inorganic non-metallic new material that a kind of electrical insulation capability is good, high temperature resistant, corrosion-resistant, tensile strength is high, is widely used in fields such as electronics, machinery, Aero-Space, petrochemical industry, building.So fiber glass industry has been one of the swiftest and the most violent industry of development since nearly half a century, is state-of-the-art production technology, has characteristics such as production scale is big, efficient is high, energy consumption is low, good product quality and adopt unit kiln to produce glass fibre.
About technological process and oxygen enrichment index with embodiment 1, then be the 3-15% that Rich Oxygen Amount accounts for combustion air volume, oxygen-enriched air is preheating to 200-500 ℃ by the big arch of high temperature of unit kiln, the quantity of special-purpose oxygen enrichment nozzle (3) is many, general 10 to 26, usually adopt " gradient burning " technology, oxygen enrichment is delivered to the place of 10 ± 3cm under the oil gun by special-purpose oxygen enrichment nozzle (3), approximately be inclined upwardly 4 ± 2 °, the about 80 ± 20m/s of oxygen enrichment linear speed.The material of special-purpose oxygen enrichment nozzle (3) is the heat resisting pipe of Φ 30 ± 10MM, and head is a flat, 40 ± 15 ° of angles of flare, and installing does not need blowing out.
After feeding oxygen enrichment, the combustion air volume 1/3-1/8 that descended, blast reduces 20-60%, fuel-economizing generally between 12-40%, become the silk rate generally to improve 2-5%, and big arch temperature generally descends 25-90 ℃, 10-40 ℃ of temperature of glass liquid rising, exhaust gas temperature reduces 40-100 ℃.
Owing to be becoming tight energy day, it is more and more that fuel oil changes the glass melting furnace that uses producer gas at present, and effect was remarkable equally after this stove adopted partial oxygenation combustion-supporting apparatus.
About technological process and oxygen enrichment index with embodiment 1, then be the 1-4.5% that Rich Oxygen Amount accounts for combustion air volume, oxygen enrichment must and combustion air and coal gas commutate simultaneously.The quantity of special-purpose oxygen enrichment nozzle (3) is fewer, general 2 or 4.Special-purpose oxygen enrichment nozzle (3) needs and coal gas and combustion air synchronous communicating, and other is with embodiment 2.General installation does not need blowing out, and the distance of removing between non-glass kiln and the regenerator is too narrow or poor owing to being incubated, and temperature is too high, and the people can't enter to construct.
After feeding oxygen enrichment, the combustion air volume 1/4-1/7 that generally descends economizes on coal generally between 10-30%, glass quality increases, and big arch temperature generally descends 20-90 ℃, 10-40 ℃ of temperature of glass liquid rising, the kiln condition is more stable, and furnace pressure also descends to some extent, and exhaust gas temperature reduces 40-100 ℃.
Spreader feeder reversing chain furnace fuel tolerance is good, regulates sensitivity, but smoke evacuation lingemann blackness height, the thermal efficiency is on the low side, and present embodiment will fundamentally address these problems exactly.The same Fig. 1 of technological process among this embodiment, oxygen source adopts embrane method, sees Fig. 2.Rich Oxygen Amount generally accounts for combustion air volume 0.5-3.5%, oxygen-rich concentration 29 ± 2%, general " burning of α type ", " burning of S type " or " corner firing " and " postponing burning " technology of adopting.The special-purpose oxygen enrichment nozzle (3) of the certain angle of flare of custom-designed band (0-40 °) with oxygen-enriched air from the boiler both sides, vertical with the throwing coal direction of spreader feeder, but the high 0.1-1 rice of parabola that height forms than spreader feeder, pressure head is 2000-25000Pa, flow velocity is 30-150m/s, branch 6-12 group to blowing, enters the burning area of coverage to burner hearth, and makes flame form vortex.Oxygen-enriched air itself had both helped the second-time burning of fugitive constituent or flying dust carbon residue as secondary wind, and simultaneously custom-designed nozzle guarantees that oxygen enrichment wind has enough kinetic energy, is enough to the disturbance flue gas and makes it to form eddy current in the stove, reaches the purpose of fugitive constituent and flying dust carbon residue after-flame.
Compare with normal air is combustion-supporting, economize on coal generally between 5-20%, the annual economize on electricity of ventilation blower and air-introduced machine 5-15%, quantity of steam is regulated more flexible, generally can improve 5-30%, the smoke evacuation lingemann blackness drops to below the one-level from 3-4 level average energy, but also has resultant effects such as stable boiler working condition, prolonged boiler life-span.
Embodiment 5, float glass furnace
More remarkable effect behind the float glass furnace employing partial oxygenation combustion-supporting apparatus: because float glass furnace needs nitrogen protection, so a large amount of byproducts-oxygen-enriched air emptying is generally all arranged.Wherein oxygen-rich concentration is at 30-48%, and flow accounts for the 8-15% of combustion air volume, satisfies the requirement of local oxygen enriching burning-aid fully.
Usually the bottom of the not all Fuel lance of float glass furnace all adds special-purpose oxygen enrichment nozzle (3), mainly performance and the temperature schedule according to product optionally adds, the quantity of general special-purpose oxygen enrichment nozzle (3) accounts for 1/2 to 2/3 of Fuel lance quantity greatly, promptly 10 to 30.Special-purpose oxygen enrichment nozzle (3) needs and the Fuel lance synchronous communicating, and general installation does not need blowing out, does not need to add pressure fan under the normal condition yet.
After using partial oxygenation combustion-supporting apparatus, energy-conservation between 3-15%, yield rate improves 1-5%, and output improves 2-15%, and flue dust reduces 5-35%, 15-60 ℃ of exhaust gas temperature decline.
Claims (5)
1. partial oxygenation combustion-supporting apparatus that is used for industrial furnace, promptly at the other cover partial oxygenation combustion-supporting apparatus that adds of industrial furnace, this device comprises oxygen source (1), oxygen enrichment preheater (2), special-purpose oxygen enrichment nozzle (3) and adjustment control (4) four major parts, it is characterized in that oxygen source (1), oxygen enrichment preheater (2) and special-purpose oxygen enrichment nozzle (3) are connected successively, only oxygen enrichment preheater (2) contacts with kiln (5) with special-purpose oxygen enrichment nozzle (3).
2. a kind of partial oxygenation combustion-supporting apparatus that is used for industrial furnace according to claim 1, the shape that it is characterized in that special-purpose oxygen enrichment nozzle (3) can be circle, annular or flat; Material can be metal, nonmetal or special material such as ceramic steel pipe; Angle of flare is generally between ± 60 °; On have a down dip generally between ± 90 °.
3. a kind of partial oxygenation combustion-supporting apparatus that is used for industrial furnace according to claim 1, the position that it is characterized in that special-purpose oxygen enrichment nozzle (3), for glass furnace, generally be placed on the bottom of fuel nozzle, the place of position 10 ± 3cm under fuel nozzle, if fuel nozzle needs commutation, then special-purpose oxygen enrichment nozzle (3) needs synchronous communicating.
4. a kind of partial oxygenation combustion-supporting apparatus that is used for industrial furnace according to claim 1, the position that it is characterized in that special-purpose oxygen enrichment nozzle (3), other Industrial Stoves (except the glass furnace) for fuel oil and combustion gas, can be placed on fuel nozzle upper and lower, left and right, before or after, need symmetric arrangement; For spreader stoker boiler, chain furnace, special-purpose oxygen enrichment nozzle (3) can be placed under the traveling-grate stoker or secondary wind; For coal-powder boiler, special-purpose oxygen enrichment nozzle (3) can be put tertiary air position, four jiaos or its upper and lower, left and right.
5. a kind of partial oxygenation combustion-supporting apparatus that is used for industrial furnace according to claim 1, it is characterized in that oxygen source (1) can be embrane method, also can be pressure swing adsorption method, Deep Cooling Method, chemical method or industry byproduct, 0.5-15%, the oxygen-rich concentration that the Rich Oxygen Amount that is provided is generally the combustion-supporting required air quantity of kiln (5) is generally that 22-98.5%, oxygen enrichment linear speed are generally 10-200m/s, oxygen enrichment pressure is generally 2-50Kpa.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2004200140051U CN2769705Y (en) | 2004-09-22 | 2004-09-22 | Local aerating and combustion aiding device for industrial kiln |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2004200140051U CN2769705Y (en) | 2004-09-22 | 2004-09-22 | Local aerating and combustion aiding device for industrial kiln |
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| CN2769705Y true CN2769705Y (en) | 2006-04-05 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010091606A1 (en) * | 2009-02-10 | 2010-08-19 | 大连天邦机电设备有限公司 | Integrative energy-saving and emission-reduction local oxygen-increasing combustion-supporting device and method thereof |
| CN102767840A (en) * | 2011-05-03 | 2012-11-07 | 安徽中企能源管理有限公司 | Oxygen-enriched and combustion-supporting boiling burner assembly of industrial boiler |
| CN102767841A (en) * | 2011-05-03 | 2012-11-07 | 安徽省科捷再生能源利用有限公司 | Boiling and burning technique under enriched oxygen and combustion supporting of industrial boiler |
| CN103090665A (en) * | 2012-11-30 | 2013-05-08 | 沈光林 | Partial oxygenation combustion-supporting device and method for rotary kiln |
| CN113154437A (en) * | 2021-04-20 | 2021-07-23 | 西安热工研究院有限公司 | Boiler oxygen-enriched combustion system capable of improving oxygen concentration based on magnetization |
-
2004
- 2004-09-22 CN CNU2004200140051U patent/CN2769705Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010091606A1 (en) * | 2009-02-10 | 2010-08-19 | 大连天邦机电设备有限公司 | Integrative energy-saving and emission-reduction local oxygen-increasing combustion-supporting device and method thereof |
| CN102767840A (en) * | 2011-05-03 | 2012-11-07 | 安徽中企能源管理有限公司 | Oxygen-enriched and combustion-supporting boiling burner assembly of industrial boiler |
| CN102767841A (en) * | 2011-05-03 | 2012-11-07 | 安徽省科捷再生能源利用有限公司 | Boiling and burning technique under enriched oxygen and combustion supporting of industrial boiler |
| CN103090665A (en) * | 2012-11-30 | 2013-05-08 | 沈光林 | Partial oxygenation combustion-supporting device and method for rotary kiln |
| CN103090665B (en) * | 2012-11-30 | 2014-10-15 | 沈光林 | Partial oxygenation combustion-supporting device |
| CN113154437A (en) * | 2021-04-20 | 2021-07-23 | 西安热工研究院有限公司 | Boiler oxygen-enriched combustion system capable of improving oxygen concentration based on magnetization |
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