CN101893253A - Method for improving combustion temperature of combustion furnace by local oxygen-enriched oxygenation jet combustion-supporting technology and device thereof - Google Patents
Method for improving combustion temperature of combustion furnace by local oxygen-enriched oxygenation jet combustion-supporting technology and device thereof Download PDFInfo
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- CN101893253A CN101893253A CN2010102718259A CN201010271825A CN101893253A CN 101893253 A CN101893253 A CN 101893253A CN 2010102718259 A CN2010102718259 A CN 2010102718259A CN 201010271825 A CN201010271825 A CN 201010271825A CN 101893253 A CN101893253 A CN 101893253A
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Abstract
The invention provides a method for improving combustion temperature of a combustion furnace by a local oxygen-enriched oxygenation jet flow combustion-supporting technology, comprising the following steps: oxygen-enriched gas with higher linear velocity is delivered to some combustion flame position for combustion-supporting through an oxygen-enriched nozzle with a small spread angle; and after pressurization, the oxygen-enriched gas enters a fuel flow area for mixing and combusting at 12-45 degrees with the jet fuel and with linear velocity which is 1.5-5.0 times of the fuel flow velocity in a jet flow manner, wherein the position in which the oxygen-enriched gas enters is at the center of the combustion flame position and is slightly deviated from a fuel nozzle. The invention further provides a corresponding device. The invention has the advantage that by adopting the special oxygen-enriched jet nozzle with the small spread angle and a thermal radiation principle, under the conditions that fuel consumption is not increased, any structure of the original furnace is not changed and only an oxygen-enriched preheating system and the oxygen-enriched nozzle are contacted with a furnace body, the temperature of a combustion flame area is improved maximally.
Description
Technical field
The present invention relates to method and device that combustion furnace by oxygen-rich partial oxygen-enriched jet flow combustion supporting improves ignition temperature, be applicable to various fuel and all combustion furnaces, Industrial Boiler, heating furnace, 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 to heat certain medium, to toast some material or to burn some material mostly, this all is necessary to reach the temperature of design, but a lot of combustion furnaces particularly some old combustion furnaces because of using age long or strengthen and cause ignition temperature on the low side because of producing load, what also have fires natural gas or gas burner because of local environmental requirement reduces sulfide emission with oil burner instead, the ignition temperature that changes after the combustion gas is lower than fuel oil temperature, and this will influence the ordinary production of combustion furnace; And if do not reach designing requirement for the incinerator ignition temperature, have the poisonous and harmful substances of not burned in a large number and enter atmosphere and cause severe contamination.
The heat that fuel combustion is released is included in the combustion product of gaseous state, and the temperature that its combustion product can reach during fuel combustion is called the ignition temperature of fuel.The combustion flame maximum temperature general big about the flame top near the blue look flame place of fuel nozzle about 1/3rd.Influence the factor of ignition temperature and improve the approach of ignition temperature as follows:
(1) caloric value of fuel is high more, and ignition temperature is also high more.Therefore, when having relatively high expectations temperature, should select the high high-grade fuel of caloric value for use.
(2) air and fuel preheating can be improved ignition temperature, and preheat temperature combustion temperatures is also high more more, particularly the meaning of preheated air is bigger.
(3) reduce the heat loss of stove, as radiation loss, the accumulation of heat loss of furnace wall, open fire door radiation heat loss etc. as far as possible.
(4) guarantee fuel completing combustion as far as possible, reduce mechanical incomplete combustion and chemically incomplete combustion.
(5) under the situation that guarantees completing combustion, should reduce coefficient of excess air as far as possible and utilize oxygen-enriched combustion-supporting etc.
Now a lot of combustion furnace users relatively pay attention to the preheating of combustion air and the insulation of combustion furnace, but oxygen-enriched combustion-supporting is understood few, use oxygen-enriched combustion-supporting just still less.The combustion furnace of the relatively more nervous countries and regions of external as Japan, Korea S, European equal energy source on newly much all uses oxygen-enriched combusting, but their oxygen-enriched combusting all is whole oxygen enriching burning-aid mostly, whole oxygen enriching burning-aid cost height and side effect are many, do not reach best to improving the ignition temperature effect.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can overcome above-mentioned deficiency and utilize local oxygen enriching burning-aid method and combustion furnace by oxygen-rich partial oxygen-enriched jet flow combustion supporting that fluidics improves ignition temperature improves the method for ignition temperature.
Combustion furnace by oxygen-rich partial oxygen-enriched jet flow combustion supporting improves the method for ignition temperature, comprises that fuel and oxygen rich gas enter to flock together in the combustion furnace separately to mix and burn, and it is characterized in that:
1, the 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, add oxygen-enriched combusting and can improve combustion centre's temperature significantly, general fuel oil can improve 20 ~ 120 ℃, the combustion natural gas can improve 20 ~ 90 ℃, fire coal can improve 20 ~ 110 ℃, 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, so radiation chamber improved the radiation efficiency of radiation chamber flue gas significantly because of triatomic molecule concentration increases, thereby improved the mean temperature of radiation chamber significantly.
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 enrichment; After utilizing local oxygen-enriched oxygenation jet combustion supporting,, just can improve ignition temperature significantly like this, comprise the temperature that improves combustion flame significantly and the mean temperature of radiation chamber if do not reduce the fuel supply flow amount.
If 4 utilize local oxygen-enriched oxygenation jet combustion supporting after, combustion flame temperature improves too many and when surpassing manufacturing technique requirent, then can regulate combustion flame temperature by reducing the fuel supply flow.
If 5 utilize local oxygen-enriched oxygenation jet combustion supporting after, when also not reaching manufacturing technique requirent after combustion flame temperature improves, then can regulate combustion flame temperature 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 right amount.
Correspondingly, the present invention also provides corresponding combustion furnace by oxygen-rich partial oxygen-enriched jet flow combustion supporting to improve the device of ignition temperature according to said method, comprise 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, thereby improve ignition temperature to greatest extent with combustion flame point temperature.
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 significantly, 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.
2. by the help of infrared radiation thermometer,, make the regional temperature of combustion flame bring up to maximum by regulating the angle of oxygen rich air nozzle and fuel nozzle.
3. utilize local oxygen-enriched oxygenation jet 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.
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 fuel nozzle ports arrives the flame top zone) the centre concentrate high-efficiency jet combustion-supporting in the position of fuel nozzle 13 slightly partially.
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.
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. combustion furnace by oxygen-rich partial oxygen-enriched jet flow combustion supporting improves the method for ignition temperature, comprising that fuel and oxygen rich gas enter to flock together in the combustion furnace (14) separately mixes and burns, it is characterized in that: the oxygen rich gas of higher line speed is sent into inclined to one side slightly fuel nozzle (13) position, centre of combustion flame by little angle of flare 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. combustion furnace by oxygen-rich partial oxygen-enriched jet flow combustion supporting as claimed in claim 1 improves the method for ignition temperature, it is characterized in that: combustion centre's fuel is mixed with oxygen rich gas fully and have sufficient combustion-supporting oxygen, 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, add oxygen-enriched combusting and can improve combustion centre's temperature significantly, general fuel oil can improve 20 ~ 120 ℃, combustion natural gas and can improve 20 ~ 90 ℃, fire coal and can improve 20 ~ 110 ℃; 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, so radiation chamber improved the radiation efficiency of radiation chamber flue gas significantly because of triatomic molecule concentration increases, thereby improved the mean temperature of radiation chamber significantly.
3. combustion furnace by oxygen-rich partial oxygen-enriched jet flow combustion supporting as claimed in claim 1 improves the method for ignition temperature, it is characterized in that: do not change the arranged distribution structure of fuel nozzle in the burner hearth (13) and heated medium pipe (18) etc. because the present invention only by special-purpose oxygen enrichment jet nozzle (12) oxygen rich gas is sent into combustion centre, so the interior flue gas of burner hearth is constant based on the heat exchange pattern of heat radiation before and after adding oxygen enrichment; After utilizing local oxygen-enriched oxygenation jet combustion supporting,, just can improve ignition temperature significantly like this, comprise the temperature that improves combustion flame (16) significantly and the mean temperature of radiation chamber if do not reduce the fuel supply flow amount.
4. combustion furnace by oxygen-rich partial oxygen-enriched jet flow combustion supporting as claimed in claim 1 improves the method for ignition temperature, it is characterized in that: if after utilizing local oxygen-enriched oxygenation jet combustion supporting, combustion flame (16) temperature improves when also not reaching manufacturing technique requirent, then can improve combustion flame (16) temperature 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. combustion furnace by oxygen-rich partial oxygen-enriched jet flow combustion supporting improves the device of ignition temperature, comprise 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. combustion furnace by oxygen-rich partial oxygen-enriched jet flow combustion supporting as claimed in claim 5 improves the device of ignition temperature, 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, thereby improve ignition temperature to greatest extent with certain some temperature of combustion flame (16).
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175211A (en) * | 2013-03-01 | 2013-06-26 | 大连易世达新能源发展股份有限公司 | Cement kiln oxygen enrichment combustion-supporting system |
| CN103411420A (en) * | 2013-08-31 | 2013-11-27 | 魏伯卿 | Oxygen-rich partial oxygenation jet-flow combustion-supporting energy-saving emission-reducing system for rotary kiln |
| US20140242527A1 (en) * | 2011-10-03 | 2014-08-28 | Saint-Gobain Containers, Inc. | Reduced emissions combustor |
| CN104613784A (en) * | 2015-01-30 | 2015-05-13 | 魏伯卿 | Hot smoke recycling and oxygen-enriched combustion comprehensive energy-saving efficiency-improving method |
| CN107830513A (en) * | 2017-12-04 | 2018-03-23 | 国能生源科技有限公司 | A kind of efficiently focus controlled distribution biomass combustion boiler |
| CN114198746A (en) * | 2021-12-03 | 2022-03-18 | 北京航化节能环保技术有限公司 | Non-premixed flame smoke-eliminating accurate air distribution method |
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| CN201496985U (en) * | 2009-09-07 | 2010-06-02 | 魏伯卿 | Jet nozzle for oxygen-enriched 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
- 2010-09-03 CN CN2010102718259A patent/CN101893253A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201496985U (en) * | 2009-09-07 | 2010-06-02 | 魏伯卿 | Jet nozzle for oxygen-enriched 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 |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140242527A1 (en) * | 2011-10-03 | 2014-08-28 | Saint-Gobain Containers, Inc. | Reduced emissions combustor |
| CN103175211A (en) * | 2013-03-01 | 2013-06-26 | 大连易世达新能源发展股份有限公司 | Cement kiln oxygen enrichment combustion-supporting system |
| CN103411420A (en) * | 2013-08-31 | 2013-11-27 | 魏伯卿 | Oxygen-rich partial oxygenation jet-flow combustion-supporting energy-saving emission-reducing system for rotary kiln |
| CN103411420B (en) * | 2013-08-31 | 2014-10-01 | 魏伯卿 | Oxygen-rich partial oxygenation jet-flow combustion-supporting energy-saving emission-reducing system for rotary kiln |
| CN104613784A (en) * | 2015-01-30 | 2015-05-13 | 魏伯卿 | Hot smoke recycling and oxygen-enriched combustion comprehensive energy-saving efficiency-improving method |
| CN104613784B (en) * | 2015-01-30 | 2016-04-27 | 魏伯卿 | Hot cigarette reclaims oxygen-enriched combustion-supporting synthesis energy saving and puies forward efficacious prescriptions method |
| CN107830513A (en) * | 2017-12-04 | 2018-03-23 | 国能生源科技有限公司 | A kind of efficiently focus controlled distribution biomass combustion boiler |
| CN114198746A (en) * | 2021-12-03 | 2022-03-18 | 北京航化节能环保技术有限公司 | Non-premixed flame smoke-eliminating accurate air distribution method |
| CN114198746B (en) * | 2021-12-03 | 2024-02-09 | 北京航化节能环保技术有限公司 | Accurate air distribution method for non-premixed flame smoke abatement |
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Application publication date: 20101124 |