CN201137933Y - Low NOx coal fines thick and thin oil-saving burner - Google Patents
Low NOx coal fines thick and thin oil-saving burner Download PDFInfo
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- CN201137933Y CN201137933Y CNU2007201129138U CN200720112913U CN201137933Y CN 201137933 Y CN201137933 Y CN 201137933Y CN U2007201129138 U CNU2007201129138 U CN U2007201129138U CN 200720112913 U CN200720112913 U CN 200720112913U CN 201137933 Y CN201137933 Y CN 201137933Y
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Abstract
The utility model discloses a low NOx pulverized coal shade fuel-saving burner. The burner is provided with a primary wind pipe, wherein a pulverized coal concentrator is arranged in the primary wind pipe, an outlet of the primary wind pipe is connected with a jet orifice of the burner, a wall temperature monitoring device is arranged on the outer wall of the jet orifice of the burner, an oil gun sleeve is arranged in the center of the primary pipe, an air inlet pipe is arranged on the side wall of one end of the oil gun sleeve, an electric regulating air door is arranged on the air inlet pipe, the other end of the oil gun sleeve is provided with a corrugated combustion stabilization device, an insolating hood is designed outside the corrugated combustion stabilization device, a little oil gun and an igniter are arranged in the center of the oil gun sleeve, and the tail portion of the little oil gun is provided with a cyclone air distributing device. The burner can lower the discharge amount of NOx which is produced through burning coal by 60 to 80 % and can realize pulverized coal shade burning with the functions of low load, non-oil investment and stable combustion, when a boiler cooled furnace kindles and burns stably with low load, little oil can be used to ignite a large amount of pulverized coal directly, and the rate of economizing fuel can reach more than 90%.
Description
Technical field
The utility model relates to coal powder burner, relates in particular to a kind of low NOx coal powder light-dark oil-saving burner.
Background technology
China is coal-fired big country, and the environmental pollution that the energy causes is serious day by day, is restricting the sustainable development of China's economy and society.Give off all contaminations in the coal-fired process, wherein nitrogen oxide (NOx) is one of main matter that causes atmosphere pollution, and the NOx discharge capacity is closely bound up with the coal characteristic and the burner air distribution mode that use.
Along with the variation of coal market supply-demand relationship, the coal supply anxiety, the ature of coal that many boilers use does not all reach designing requirement, cause a series of problems such as the serious coking of boiler, unburned carbon in flue dust height, thereby the peace that influences boiler is gone economical operation.The key point that solves the boiler operatiopn of ature of coal variable effect is strengthened burner exactly and is surely fired performance, and realizes that pulverized coal bias combustion is one of means of intensified burner combustibility.
Oil is the rare strategic resource of China, and pulverized-coal fired boiler all consumes a large amount of fuel oils that helps in kindling stage and low-load combustion-stabilizing stage, and therefore, State Economic and Trade Commission is with pulverized-coal fired boiler non-oil ignition and the few-oil ignition technology project as focus development and popularization.
Domestic eddy flow low-NOx combustor, pulverized coal bias combustion device and the plasma successfully developed do not have oil and small oil gun few-oil ignition technology, but these technology only solve the problem of one of them or two aspects, and there is the defective of others, adopt front-back wall to arrange as the eddy flow low-NOx combustor, the NOx discharge capacity is lower, but can not realize that burner in the stove flame supports mutually, furnace flame degree of filling, low-load combustion-stabilizing poor-performing; The pulverized coal bias combustion device is primarily aimed at the DC burner that quadrangle tangential circle is arranged, though furnace flame degree of filling and low-load combustion-stabilizing better performances, the NOx discharge capacity is higher relatively, and high temperature corrosion and serious coking take place easily in the water-cooling wall zone in the stove; Domestic already used plasma non-oil ignition technology, few-oil ignition technology use object only to be high-volatile bituminous coal, undesirable to soft coal, meager coal and anthracite oil-saving effect, and, deep or light and other the steady combustion function of plasma burner and few-oil ignition combustion device coal dust free, do not throw the steady combustion of oil poor performance, combustion efficiency is poor during burning inferior coal.
Comprehensive low-NOx combustor, pulverized coal bias combustion device and the oil-saving burner characteristics of using in the market, the utility model discloses a kind of comprehensive combustion device, can realize low NOx combustion, can realize pulverized coal bias combustion again, can also when ignition of the boiler and low-load combustion-stabilizing, save and help fuel oil (rate of economizing gasoline＞80%) in a large number.
Summary of the invention
The purpose of this utility model provides a kind of low NOx coal powder light-dark oil-saving burner.
It has airduct one time, is provided with pulverized coal concentrator in the airduct, and one time wind tube outlet connects burner nozzle, and the burner nozzle outer wall is provided with the wall temperature monitoring device; One time the airduct center is provided with the oil gun sleeve pipe, oil gun sleeve pipe one distolateral wall is provided with blast pipe, blast pipe is provided with the motorized adjustment air door, the oil gun sleeve pipe other end is provided with the waveform stabilizer, the outside design isolated cover of waveform stabilizer, oil gun cover tube hub is provided with small oil gun and igniter, and the small oil gun afterbody is provided with the eddy flow air register.
Described cage is 1～2.The burner nozzle outer wall is provided with the wall temperature monitoring device.The wall temperature monitoring device is 1～4 cover.The concentrated ratio of powder inspissator is 1: 1～1: 10.
The beneficial effects of the utility model:
(1) coal dust firing NOx discharge capacity reduces by 60～80%;
(2) have underload (40%) and do not throw the steady combustion function of oil;
(3) (80～100kg/h) surely fire function to have a small amount of oil of ultra-low load (10～30%) throwing;
(4) coal dust that directly comes into operation during the boiler kindling is saved great amount of fuel oil (more than 80%);
(5) be fit to use various atures of coal, comprise anthracite, meager coal, bituminous coal and brown coal;
(6) make boiler realize the combustion system of bellows chamber powder, effectively prevent burner in the stove zone water-cooling wall coking and high temperature corrosion;
(7), regulate center air quantity size automatically, control burner outlet reflux area length, protection burner nozzle safety according to the burner nozzle temperature;
(8) system reform is simple, and cost of investment is low, and market prospects are wide.
Description of drawings
Fig. 1 is low NOx coal powder light-dark fuel-economizing burning structure schematic diagram, among the figure, and igniter 1, small oil gun 2, blast pipe 3, motorized adjustment air door 4,5, airducts 6 of oil gun sleeve pipe, pulverized coal concentrator 7, cage 8, waveform stabilizer 9, spout 10, eddy flow air register 11, temperature measuring equipment 12;
Fig. 2 is an inspissator concentrated effect schematic diagram;
Fig. 3 is waveform stabilizer and burner outlet smoke backflow schematic diagram.
The specific embodiment
As shown in Figure 1, low NOx coal powder light-dark oil-saving burner has and is provided with 6 outlets of 7, airducts of pulverized coal concentrator in 6, airducts 6 of an airduct and connects burner nozzles 10, and burner nozzle 10 outer walls are provided with wall temperature monitoring device 12; One time airduct 6 centers are provided with oil gun sleeve pipe 5, oil gun sleeve pipe 5 one distolateral walls are provided with blast pipe 3, blast pipe 3 is provided with motorized adjustment air door 4, oil gun sleeve pipe 5 other ends are provided with waveform stabilizer 9, waveform stabilizer 9 outside design isolated covers 8, oil gun sleeve pipe 5 centers are provided with small oil gun 2 and igniter 1, and the small oil gun afterbody is provided with eddy flow air register 11.
Described cage 8 is 1～2.Burner nozzle 10 outer walls are provided with wall temperature monitoring device 12.Wall temperature monitoring device 12 is 1～4 cover.The concentrated ratio of pulverized coal concentrator 7 is 1: 1～1: 10.
1. pulverized coal bias combustion is realized
As shown in Figure 2, pulverized coal concentrator designs according to the principle of impacting type separator, when breeze airflow was flowed through the impact block cross section, under the guide effect of impact block, the part breeze airflow changed flow direction, because effect of inertia, pulverized coal particle focuses on pipeline center in impact block surface bounce-back, and after air flows through impact block, the pressure autobalance, equal stream mode in the just basic recovery pipe behind certain distance.Cage 8 is separated into deep or light two parts with breeze airflow, and the higher breeze airflow of concentration is passed through by cage 8 inside, and the thin powdered coal air-flow that concentration is lower is passed through by cage 8 outsides.By changing the height of inspissator 7 impact blocks, can change 8 inside and outside coal powder density ratios of cage.As shown in Figure 3, cage 8 and 9 outlets of waveform stabilizer all are designed to loudspeaker enlarging shape, according to fluid mechanics principle, one negative pressuren zone appears at waveform stabilizer rear portion, make ablaze part coal fines high-temperature smoke backflow near the outlet of waveform stabilizer, breeze airflow is heated, help breeze airflow fire burns.Because concentration height breeze airflow is heated earlier, adds coal powder density height own, this two aspect is catching fire of breeze airflow and advantage has been created in smooth combustion; After the thick coal culm air-flow fire burns, flame spread drove the burning of thin powdered coal air-flow, and external environment is little to the influence of thick coal culm gas stream burning, so whole burner outlet flame stabilization, reliable.
2. the realization of low NOx drainage
Under normal conditions, among the NOx that coal combustion generates, NO accounts for more than 90%, NO2 accounts for 5-10%, and under oxidizing atmosphere, NO further is oxidized to NO2, and under reducing atmosphere, C and CO imperfect combustion in the coal can be reduced into NO N2 and CO2, therefore, can send into the generation of oxygen amount and the control fuel quantity control NOx that send at different levels by classification.
The utility model is divided into deep or light two parts with breeze airflow, the thick coal culm air-flow is surrounded by the thin powdered coal air-flow, the thick coal culm air-flow combustion zone air capacity of catching fire is few, form reducing atmosphere, effectively suppressing NOx generates, the thin powdered coal air-flow surrounds whole thick coal culm air-flow, carry oxygen-supplying amount for coal dust firing on the one hand, prevent the reducing atmosphere diffusion on the other hand, cause coking of burner region water-cooling wall and high temperature corrosion, simultaneously, unburned fixed carbon plays certain reduction to the NOx that generates in the thick coal culm air-flow in the thin powdered coal air-flow, thereby reduces the discharging of NOx significantly.
3. high efficiency, oil saving is realized
Breeze airflow catches fire need provide certain heat that catches fire, and the amount of heat of catching fire and ature of coal, wind powder air-flow coal powder density, air quantity are relevant with heat transfer type.Under existing ature of coal condition together, wind powder air-flow coal powder density is big, air quantity is little, and the initial ignition heat of required breeze airflow is just little.The conventional pulverized-coal boiler, use light oil and provide initial heat for wind powder air-flow, during boiler startup, light earlier and be arranged in the interior big oil gun of overfire air port to improve chamber flue gas temperature, high-temperature flue gas is passed to primary air jet by convection current with heat, the convective exchange heat of this high-temperature flue gas and a wind is about the oil gun burning and produces about 1/5 of heat.
The utility model is arranged in oil gun in wind combustor, direct firing coal-dust, because burner has also been taked the mode of Pulverized Coal Concentration and air quantity classification, improve igniting initial stage coal powder density and also reduced air quantity simultaneously, so can reduce initial coal dust ignition heat amount significantly.When using the utility model point stove, earlier with the igniter 1 small oil gun 2 interior fuel oils that ignite, feed oily combustion air in the blast pipe 3, guarantee fully burning of oil, the thermal-flame of oil firing, directly light the thick coal culm air-flow that cage 8 inside are sent into, the heat that the thick coal culm gas stream burning produces is lighted the thin powdered coal air-flow that cage 8 outsides are sent into, and realizes that finally whole burner breeze airflow fire burns.The heat that burns because of oil gun is directly passed to breeze airflow, can save 80% initial ignition heat, simultaneously, the coal powder density that initially catches fire has improved 2～3 times relatively, on above-mentioned fuel-economizing basis, also can save 50～60% heats that initially catch fire, therefore, use this invention, comprehensive rate of economizing gasoline is more than 90% during the boiler kindling.
In a word, this invention has low NOx drainage (reducing by 60～80%NOx discharge capacity), fuel-saving efficiency height (more than 90%), can directly light colm (comprising soft coal, meager coal and anthracite) under the boiler cold-state situation, has characteristics such as not throwing oily low-load combustion-stabilizing ability, system's simple and reliable property height.Than like product function more comprehensively, system is simpler.
Claims (4)
1. one kind low NOx coal powder light-dark oil-saving burner, it is characterized in that it has an airduct (6), be provided with pulverized coal concentrator (7) in the airduct (6), an airduct (6) outlet connects burner nozzle (10), and burner nozzle (10) outer wall is provided with wall temperature monitoring device (12); An airduct (6) center is provided with oil gun sleeve pipe (5), oil gun sleeve pipe (5) one distolateral walls are provided with blast pipe (3), blast pipe (3) is provided with motorized adjustment air door (4), oil gun sleeve pipe (5) other end is provided with waveform stabilizer (9), the outside design isolated cover of waveform stabilizer (9) (8), oil gun sleeve pipe (5) center is provided with small oil gun (2) and igniter (1), and the small oil gun afterbody is provided with eddy flow air register (11).
2. a kind of low NOx coal powder light-dark oil-saving burner according to claim 1 is characterized in that described cage (8) is 1～2.
3. a kind of low NOx coal powder light-dark oil-saving burner according to claim 1 is characterized in that, described wall temperature monitoring device (12) is 1～4 cover.
4. a kind of low NOx coal powder light-dark oil-saving burner according to claim 1 is characterized in that the concentrated ratio of described pulverized coal concentrator (7) is 1: 1～1: 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201129138U CN201137933Y (en) | 2007-08-06 | 2007-08-06 | Low NOx coal fines thick and thin oil-saving burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201129138U CN201137933Y (en) | 2007-08-06 | 2007-08-06 | Low NOx coal fines thick and thin oil-saving burner |
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| Publication Number | Publication Date |
|---|---|
| CN201137933Y true CN201137933Y (en) | 2008-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007201129138U Expired - Fee Related CN201137933Y (en) | 2007-08-06 | 2007-08-06 | Low NOx coal fines thick and thin oil-saving burner |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104944426A (en) * | 2015-06-17 | 2015-09-30 | 重庆市富燃科技有限责任公司 | Device and method for producing carbon monoxide through igniting coal powder |
| CN106322365A (en) * | 2015-07-01 | 2017-01-11 | 重庆市富燃科技有限责任公司 | Apparatus and method for generating carbon monoxide through igniting coal dust at nozzle |
| CN108930960A (en) * | 2018-07-25 | 2018-12-04 | 汪建军 | A kind of bluff body of environmental protection coal burner |
| CN111520709A (en) * | 2020-04-10 | 2020-08-11 | 王德志 | Novel direct-current pulverized coal burner capable of stabilizing flame |
| CN112212310A (en) * | 2020-11-12 | 2021-01-12 | 中国电力工程顾问集团华北电力设计院有限公司 | Central backfire stable combustion device of pulverized coal furnace burner |
| CN112325284A (en) * | 2020-11-03 | 2021-02-05 | 哈尔滨锅炉厂有限责任公司 | Low-load stable-combustion burner |
-
2007
- 2007-08-06 CN CNU2007201129138U patent/CN201137933Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104944426A (en) * | 2015-06-17 | 2015-09-30 | 重庆市富燃科技有限责任公司 | Device and method for producing carbon monoxide through igniting coal powder |
| CN106322365A (en) * | 2015-07-01 | 2017-01-11 | 重庆市富燃科技有限责任公司 | Apparatus and method for generating carbon monoxide through igniting coal dust at nozzle |
| CN108930960A (en) * | 2018-07-25 | 2018-12-04 | 汪建军 | A kind of bluff body of environmental protection coal burner |
| CN111520709A (en) * | 2020-04-10 | 2020-08-11 | 王德志 | Novel direct-current pulverized coal burner capable of stabilizing flame |
| CN112325284A (en) * | 2020-11-03 | 2021-02-05 | 哈尔滨锅炉厂有限责任公司 | Low-load stable-combustion burner |
| CN112325284B (en) * | 2020-11-03 | 2022-07-15 | 哈尔滨锅炉厂有限责任公司 | Low-load stable-combustion burner |
| CN112212310A (en) * | 2020-11-12 | 2021-01-12 | 中国电力工程顾问集团华北电力设计院有限公司 | Central backfire stable combustion device of pulverized coal furnace burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081022 Termination date: 20090907 |