CN101893254A - Method and device for improving production load of combustion furnace by oxygen enrichment and local oxygenation jet combustion supporting - Google Patents
Method and device for improving production load of combustion furnace by oxygen enrichment and local oxygenation jet combustion supporting Download PDFInfo
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- CN101893254A CN101893254A CN2010102718526A CN201010271852A CN101893254A CN 101893254 A CN101893254 A CN 101893254A CN 2010102718526 A CN2010102718526 A CN 2010102718526A CN 201010271852 A CN201010271852 A CN 201010271852A CN 101893254 A CN101893254 A CN 101893254A
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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 provides a method for improving production load of a combustion furnace by oxygen enrichment and local oxygenation jet combustion supporting, comprising the following steps: a great amount of oxygen-enriched gas having a high linear speed is transmitted to a certain position of combustion flame through an oxygen-enriched nozzle with a small diffuse angle for combustion supporting; and the oxygen-enriched gas is pressurized and then jetted into a fuel flow area for mixing and combustion in a mode of having an included angle of 12-45 degrees with the jet fuel at the linear speed which is 1.5-5.0 times of the flow speed of the fuel, and the entering position of the oxygen-enriched gas is the position slightly deviated to the fuel nozzle at the center part of the combusting flame. The invention further provides a corresponding device. The invention has the advantages in that by using the special oxygen-enriched jet nozzle with the small diffuse angle and a thermal radiation principle, under the conditions that any structure of an original furnace is unchanged and only an oxygen-enriched preheat system and the oxygen-enriched nozzle are contacted with the furnace body, the temperature of the flame combustion area is maximally improved, thereby ensuring that original processing parameters are unchanged by increasing the flow speed of the heated medium to improve the production load.
Description
Technical field
The present invention relates to method and device that local oxygen-enriched oxygenation jet combustion supporting improves production load of combustion furnace, be applicable to various fuel and all combustion furnaces, Industrial Boiler, heating furnace, notes vapour stove, smelting furnace, ceramic kiln, glass furnace, cement kiln and incinerator etc. as fuel-firing gas-firing belong to synthetic energy-saving discharge-reducing technical field and combustion science technical field.
Background technology
The purpose of general combustion furnace all is to be used for heating, toasting certain medium or burn some material mostly, this all is necessary to reach the production load of design, but a lot of combustion furnaces particularly some old combustion furnaces because of using age long or cause combustion furnace not reach the load-bearing capacity of production needs because of business enlarges, what also have fires natural gas or gas burner because of local environmental requirement reduces sulfide emission with oil burner instead, the combustion gas after-combustion stove that changes that has does not reach the load of production requirement, and this will influence the ordinary production of combustion furnace; And if do not reach production requirement for the incinerator combustion furnace, have the poisonous and harmful substances of not burned in a large number and enter atmosphere and cause severe contamination.
General combustion furnace improves the method for producing load mainly is by reducing the heat loss transformation: comprise the insulation transformation and the flue gas heat recovery transformation of radiant section and convection section, use modern large power high efficiency burner instead and improve efficiency of combustion and improve and produce load thereby also have; But the production load proportion that these methods can improve is smaller, generally also just can only improve the production load of a few percent.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can overcome above-mentioned deficiency and utilize relatively large Rich Oxygen Amount and local oxygen enriching burning-aid method and fluidics to improve ignition temperature, thereby the local oxygen-enriched oxygenation jet combustion supporting that improves the production load of combustion furnace improves the method for production load of combustion furnace.
Local oxygen-enriched oxygenation jet combustion supporting improves the method for production load of combustion furnace, comprises that fuel and relatively large oxygen rich gas enter to flock together in the combustion furnace separately to mix and burn, and it is characterized in that:
1, the relatively large oxygen rich gas of higher line speed is the inclined to one side slightly fuel nozzle position, centre of sending into combustion flame by little angle of flare oxygen enrichment nozzle (200920195812.0), angle between oxygen enrichment nozzle and the fuel nozzle is 12 degree ~ 45 degree, the linear velocity of oxygen rich gas is 1.5 ~ 5.0 times of fuel linear velocity, does not reduce fuel flow rate after adding oxygen-enriched combustion-supporting.
2, because above-mentioned improvement, combustion centre's fuel is mixed with oxygen rich gas fully and the combustion-supporting oxygen with abundance, thereby make combustion centre be in high oxygen combustion and improved the ignition temperature of combustion centre significantly, under the condition that does not reduce fuel flow rate, after adding local oxygen-enriched oxygenation jet combustion supporting and improving combustion centre's temperature significantly, just can (technological parameters such as temperature that guarantee heated medium or baking material be constant by the flow velocity that quickens heated medium or baking material or the amount of giving of being burned material, or the incineration temperature that is burned material does not become prerequisite) improve the production load (treating capacity) of combustion furnace, generally by improving the production load 5% ~ 35% that ignition temperature can improve combustion furnace; Because after injecting oxygen enrichment for flame a part, can reduce the fuel burning-point, improve combustion intensity, accelerate burning velocity, improve flame blackness, so can improve the temperature of combustion flame significantly; Former combustion air volume had bigger minimizing after this added oxygen-enriched combustion-supporting, therefore radiation chamber has improved the radiation efficiency of radiation chamber flue gas significantly because of triatomic molecule concentration increases, thereby improve the mean temperature of radiation chamber significantly, this all helps to improve the treating capacity (producing load) of combustion furnace.
3, because only by special-purpose oxygen enrichment jet nozzle oxygen rich gas being sent into combustion centre, the present invention do not change the arranged distribution structure of fuel nozzle and heated medium pipe etc. in the burner hearth, so the interior flue gas of burner hearth is constant based on the heat exchange pattern of heat radiation before and after adding oxygen-enriched combustion-supporting; Like this after utilizing local oxygen-enriched oxygenation jet combustion supporting, if do not reduce the fuel supply flow amount, just can improve ignition temperature significantly, comprise the temperature that improves combustion flame significantly and the mean temperature of radiation chamber, therefore can improve the production load of combustion furnace significantly.
What 4, the combustion furnace of producing load for raising was joined is relative oxygen enrichment Rich Oxygen Amount that energy-saving and emission-reduction are joined than big Rich Oxygen Amount, the general raising produces Rich Oxygen Amount that load is joined and will reach 1.2 ~ 2.5 times of the pure Rich Oxygen Amount that is used for the energy-saving and emission-reduction purpose of oxygen-enriched combustion-supporting, generally to join Rich Oxygen Amount be 5% ~ 20% of combustion air volume.
If 5 utilize local oxygen-enriched oxygenation jet combustion supporting after, when combustion flame temperature improves the technological requirement that does not reach the production load that will improve, then can improve combustion flame temperature, to realize required raising production load by increasing the fuel supply flow; After utilizing the local oxygen enriching jet combustion supporting, increase the burning and the thermal efficiency that the fuel supply flow can not influence combustion furnace in the certain limit.
6, be used to improve the oxygen enrichment nozzle of production load of combustion furnace and the angle of fuel nozzle, than the pure oxygen enrichment nozzle of energy-saving and emission-reduction purpose and big 2 degree of angle ~ 6 degree of fuel nozzle of being used for.
Correspondingly, the present invention also provides corresponding local oxygen-enriched oxygenation jet combustion supporting to improve the device of production load of combustion furnace according to said method, comprise relatively large oxygen concentration device and oxygen rich gas injection apparatus, also comprise gas pressurized device, gas pressurized device is a booster pump, booster pump connects oxygen rich gas preheater and the oxygen concentration device before the oxygen-rich gas nozzle, the oxygen of oxygen concentration device enrichment is after the supercharging of gas boosting pump, enter oxygen enrichment preheater, oxygen-rich gas nozzle in turn, injection enters the combustion flame appointed part then; Oxygen-rich gas nozzle and fuel nozzle angle be 12 the degree ~ 45 the degree angles (fuel is thick more, fuel nozzle is big more, combustion position is poor more, combustion flame is long more, the angle of special-purpose jet nozzle of its oxygen rich air and fuel nozzle is just big more), oxygen rich gas enters the inclined to one side slightly fuel nozzle position, centre of combustion flame with linear velocity (fuel is thick more, fuel nozzle is big more, combustion position is poor more, combustion flame is long more, and the speed ratio of its oxygen rich gas and fuel flow rate the is big more) jet of 1.5 ~ 5.0 times of fuel flow rates; The oxygen concentration device can be: film oxygen enriching device, Deep Cooling Method oxygen-enriching device, pressure swing adsorption method oxygen-enriching device, multistage paramagnetic partition method oxygen-enriching device (200910152415.X) or other can be produced the device of oxygen rich gas; The oxygen concentration device of the embodiment of the invention is that to produce oxygen-enriching device with embrane method be example.
Infrared radiation thermometer and oxygen enrichment nozzle micromatic setting also are set, when the relative position of regulating oxygen enrichment nozzle and fuel nozzle and angle, by infrared radiation thermometer, several points for measuring temperature are measured flame temperature on the selective combustion flame axis, determine the position and the angle of oxygen enrichment nozzle and fuel nozzle when reaching maximum with combustion flame point temperature, thereby improve ignition temperature to greatest extent, and then improve the production load of combustion furnace to greatest extent.
The present invention compared with prior art has the following advantages:
1. utilize special-purpose little angle of flare oxygen enrichment jet nozzle and heat radiation principle, can under not increasing fuel consumption and any structure that does not change former stove and having only oxygen enrichment pre-heating system and oxygen enrichment nozzle and condition that body of heater contacts, improve the flame area temperature to greatest extent; Simultaneously can also improve the radiation efficiency of flue gas greatly, and then improve the mean temperature of radiation chamber because of the concentration that reduces combustion air volume and increase triatomic molecule in the flue gas; Improve the production load that flame temperature and radiation chamber mean temperature can realize improving combustion furnace.
2. by the help of infrared radiation thermometer, regulate the angle of oxygen rich air nozzle and fuel nozzle by oxygen enrichment nozzle micromatic setting, make the regional temperature of combustion flame bring up to maximum, thereby can under the condition that does not increase fuel flow rate, improve the production load of combustion furnace to greatest extent.
3. utilize relatively large oxygen-enriched combustion-supporting, can utilize existing equipment to increase a certain amount of fuel flow rate and improve ignition temperature and radiation chamber mean temperature to greatest extent, thereby the production that improves combustion furnace is to greatest extent loaded.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the structural representation of middle oxygen enrichment nozzle embodiment illustrated in fig. 1 and fuel nozzle relative position;
Fig. 3 is a middle nozzle micromatic setting structural representation embodiment illustrated in fig. 1.
Among the figure: 1, filter cotton 2, high efficiency particle air filter 3, air-supply arrangement 4, oxygen permeable membrane device 5, vavuum pump 6, gas and water separator 7, gas pressurized device 8, oxygen enrichment preheater 9, oxygen rich gas distributor 10, control valve 11, nozzle micromatic setting 12, oxygen rich air nozzle 13, fuel nozzle 14, combustion furnace 15, the angle Φ 16 of oxygen rich air nozzle and fuel nozzle, combustion flame 17, infrared radiation thermometer 18, heated medium pipe 19, becket 20, center support ring 21, a plurality of adjusting bolts 22, oxygen rich air blast tube 23, fuel flow control valve
The specific embodiment
In the embodiment shown in Fig. 1-3: filter cotton 1 is fixed on the inlet of high efficiency particle air filter 2, air-supply arrangement 3 is connected between the outlet and oxygen permeable membrane device 4 of high efficiency particle air filter 2, the outlet of oxygen permeable membrane device 4 is successively through vavuum pump 5, gas and water separator 6 connects gas pressurized device 7, gas pressurized device 7 is a booster pump, gas pressurized device 7 outlets connect the inlet of oxygen enrichment preheater 8, the outlet of oxygen enrichment preheater 8 connects oxygen rich gas distributor 9, each outlet line of oxygen rich gas distributor 9 all is equipped with control valve 10, each control valve 10 all connects a nozzle micromatic setting 11 and corresponding oxygen rich air nozzle 12, the bilateral symmetry of each fuel nozzle 13 is provided with two or three oxygen rich air nozzle 12 on the combustion furnace 14, each oxygen rich air nozzle 12 can be under the help of infrared radiation thermometer 17, by regulating a plurality of adjusting bolts 21 on the nozzle micromatic setting 11, regulate the relative position of oxygen rich air blast tube 22 in becket 19 and center support ring 20, thereby regulate the relative position and the angle Φ 15 of oxygen rich air nozzle 12 and fuel nozzle 13, making oxygen rich gas be cut into combustion flame 16(with the linear velocity set and certain angle is that the fuel nozzle mouth is to the flame top zone) the concentrated high-efficiency jet in position of fuel nozzle 13 is combustion-supporting slightly partially in the centre.
Measure temperature by infrared radiation thermometer 17, regulate the relative position and the angle Φ 15 of oxygen enrichment nozzle 12 and fuel nozzle 13, when the flame temperature of certain point for measuring temperature reaches maximum on measuring combustion flame 16 axis, determine the position and the angle Φ 15 of oxygen enrichment nozzle 12 and fuel nozzle 13, thereby improve combustion flame temperature to greatest extent, and then can improve the production load of combustion furnace to greatest extent.
As shown in Figure 3, nozzle micromatic setting 11 comprises becket 19, is installed in a plurality of adjusting bolts 21 and a center support ring 20 on the becket 19 perpendicular to becket 19 axis screw threads, wherein oxygen rich air blast tube 22 passes becket 19 and center support ring 20 in the gap successively, connect oxygen rich air nozzle 12, a plurality of adjusting bolts 21 are distributed on the becket 19, conflict on oxygen rich air nozzle pipe 22 in the end.
Claims (6)
1. local oxygen-enriched oxygenation jet combustion supporting improves the method for production load of combustion furnace, comprising that fuel and relatively large oxygen rich gas enter to flock together in the combustion furnace (14) separately mixes and burns, it is characterized in that: the relatively large oxygen rich gas of higher line speed is inclined to one side slightly fuel nozzle (13) position, centre of sending into combustion flame (16) by little angle of flare oxygen enrichment nozzle (12), angle (15) between oxygen enrichment nozzle (12) and the fuel nozzle (13) is 12 degree ~ 45 degree, the linear velocity of oxygen rich gas is 1.5 ~ 5.0 times of fuel linear velocity, does not reduce fuel flow rate after adding oxygen-enriched combustion-supporting.
2. local oxygen-enriched oxygenation jet combustion supporting as claimed in claim 1 improves the method for production load of combustion furnace, it is characterized in that: combustion centre's fuel is mixed with oxygen rich gas fully and the combustion-supporting oxygen with abundance, thereby make combustion centre be in high oxygen combustion and improved the ignition temperature of combustion centre significantly, under the condition that does not reduce fuel flow rate, after adding local oxygen-enriched oxygenation jet combustion supporting and improving combustion centre's temperature significantly, just can (technological parameters such as temperature that guarantee heated medium or baking material be constant by the flow velocity that quickens heated medium or baking material or the amount of giving of being burned material, or the incineration temperature that is burned material does not become prerequisite) improve the production load (treating capacity) of combustion furnace (14), generally by improving the production load 5% ~ 35% that ignition temperature can improve combustion furnace (14); Because after injecting oxygen enrichment for flame a part, can reduce the fuel burning-point, improve combustion intensity, accelerate burning velocity, improve flame blackness, so can improve the temperature of combustion flame (16) significantly; Former combustion air volume had bigger minimizing after this added oxygen-enriched combustion-supporting, therefore radiation chamber has improved the radiation efficiency of radiation chamber flue gas significantly because of triatomic molecule concentration increases, thereby improve the mean temperature of radiation chamber significantly, this all helps to improve the treating capacity (producing load) of combustion furnace (14).
3. local oxygen-enriched oxygenation jet combustion supporting as claimed in claim 1 improves the method for production load of combustion furnace, it is characterized in that: the big Rich Oxygen Amount that the combustion furnace (14) of producing load for raising is joined is relative oxygen enrichment Rich Oxygen Amount that energy-saving and emission-reduction are joined, the general raising produces Rich Oxygen Amount that load is joined and will reach 1.2 ~ 2.5 times of the pure Rich Oxygen Amount that is used for the energy-saving and emission-reduction purpose of oxygen-enriched combustion-supporting, generally to join Rich Oxygen Amount be 5% ~ 20% of combustion air volume.
4. local oxygen-enriched oxygenation jet combustion supporting as claimed in claim 1 improves the method for production load of combustion furnace, it is characterized in that: if after utilizing local oxygen-enriched oxygenation jet combustion supporting, when combustion flame (16) temperature improves the technological requirement that does not reach the production load that will improve, then can improve combustion flame (16) temperature, to realize required raising production load by increasing the fuel supply flow; After utilizing the local oxygen enriching jet combustion supporting, increase the burning and the thermal efficiency that the fuel supply flow can not influence combustion furnace (14) in the certain limit.
5. the present invention also provides corresponding local oxygen-enriched oxygenation jet combustion supporting to improve the device of production load of combustion furnace according to said method, comprise relatively large oxygen concentration device and oxygen rich gas injection apparatus, also comprise gas pressurized device (7), gas pressurized device (7) connects oxygen-rich gas nozzle (12), oxygen-rich gas nozzle (12) and fuel nozzle (13) angle (15) are that (fuel is thick more for the angles of 12 degree ~ 45 degree, fuel nozzle is big more, combustion position is poor more, combustion flame is long more, the angle of special-purpose jet nozzle of its oxygen rich air and fuel nozzle is just big more), (fuel is thick more with the linear velocity of 1.5 ~ 5.0 times of fuel flow rates for oxygen rich gas, fuel nozzle is big more, combustion position is poor more, combustion flame is long more, and the speed ratio of its oxygen rich gas and fuel flow rate is big more) jet fuel nozzle (13) position slightly partially, centre that enters combustion flame (16); The oxygen concentration device can be: film oxygen enriching device, Deep Cooling Method oxygen-enriching device, pressure swing adsorption method oxygen-enriching device, multistage paramagnetic partition method oxygen-enriching device or other can be produced the device of oxygen rich gas.
6. local oxygen-enriched oxygenation jet combustion supporting as claimed in claim 5 improves the device of production load of combustion furnace, it is characterized in that: infrared radiation thermometer (17) and oxygen enrichment nozzle micromatic setting (11) also are set, when the relative position of regulating oxygen enrichment nozzle (12) and fuel nozzle (13) and angle (15), by infrared radiation thermometer (17), several points for measuring temperature are measured flame temperature on selective combustion flame (16) axis, determine the position and the angle (15) of oxygen enrichment nozzle (12) and fuel nozzle (13) when reaching maximum with certain some temperature of combustion flame (16), thereby improve ignition temperature to greatest extent, and then improve the production load of combustion furnace (14) to greatest extent.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106678862A (en) * | 2015-11-09 | 2017-05-17 | 上饶市江心锅炉有限公司 | Method for oxygen-rich film and high-voltage electrostatic field combined combustion supporting |
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CN1952484A (en) * | 2006-11-10 | 2007-04-25 | 中国科学院广州能源研究所 | Oxygen-rich combustion method capable of reducing discharge of nitrogen oxide |
CN201363749Y (en) * | 2009-03-16 | 2009-12-16 | 魏伯卿 | Membrane method oxygen enrichment, local oxygenation symmetrical combustion jet and combustion-supporting energy-saving system |
CN101776277A (en) * | 2010-02-27 | 2010-07-14 | 魏伯卿 | Method and device for improving heat efficiency of combustion furnace by oxygen-rich partial oxygen-enriched jet flow combustion supporting |
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- 2010-09-03 CN CN2010102718526A patent/CN101893254A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2000283418A (en) * | 1999-03-31 | 2000-10-13 | Tokyo Gas Co Ltd | LOW-NOx RADIANT TUBE BURNER AND METHOD FOR CONTROLLING ITS OPERATION |
CN1666065A (en) * | 2002-05-15 | 2005-09-07 | 普莱克斯技术有限公司 | Low NOx combustion |
CN1510334A (en) * | 2002-07-11 | 2004-07-07 | Concentrated coal fluid combustion with reduced NOx | |
CN1952484A (en) * | 2006-11-10 | 2007-04-25 | 中国科学院广州能源研究所 | Oxygen-rich combustion method capable of reducing discharge of nitrogen oxide |
CN201363749Y (en) * | 2009-03-16 | 2009-12-16 | 魏伯卿 | Membrane method oxygen enrichment, local oxygenation symmetrical combustion jet and combustion-supporting energy-saving system |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106678862A (en) * | 2015-11-09 | 2017-05-17 | 上饶市江心锅炉有限公司 | Method for oxygen-rich film and high-voltage electrostatic field combined combustion supporting |
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