CN200968599Y - Low-polluting and self-prewarming powdered coal burner - Google Patents
Low-polluting and self-prewarming powdered coal burner Download PDFInfo
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- CN200968599Y CN200968599Y CN 200620134283 CN200620134283U CN200968599Y CN 200968599 Y CN200968599 Y CN 200968599Y CN 200620134283 CN200620134283 CN 200620134283 CN 200620134283 U CN200620134283 U CN 200620134283U CN 200968599 Y CN200968599 Y CN 200968599Y
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- Prior art keywords
- coal
- air
- burner
- wind
- main
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- 239000003245 coal Substances 0.000 title claims abstract description 59
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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[C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 239000003570 air Substances 0.000 claims abstract description 75
- 239000007789 gases Substances 0.000 claims abstract description 12
- 239000002817 coal dust Substances 0.000 claims description 43
- 239000003034 coal gas Substances 0.000 claims description 7
- 239000000567 combustion gases Substances 0.000 claims description 6
- 230000003292 diminished Effects 0.000 claims description 2
- 238000002485 combustion reactions Methods 0.000 abstract description 16
- 238000000034 methods Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 229910002089 NOx Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
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Abstract
Description
Technical field
The utility model belongs to field of energy utilization, particularly a kind of coal burner.
Background technology
The coal dust firing efficient of general industrial kiln coal burner, environment protecting etc. have bigger limitation; And be used for coal dust firing (device) device of station boiler, and need bigger space, can't adapt to the burner hearth situation of medium small boiler; Again because the rise of oil price and the restriction of gas supply condition, be that the general operating cost of boiler of fuel is higher with fuel oil and combustion gas, be irrational economically, and be subjected to the restriction of region.Coal has resource and price advantage widely in China, progressively ripe, the at home and abroad good effect and the advantage of burning and environment protection control aspect thereof on the station boiler of pulverized coal combustion, for the application of coal dust on Industrial Stoves and middle-size and small-size Industrial Boiler provides broad space, and the development coal burner that 26S Proteasome Structure and Function is reasonable, environment protecting is good also demonstrates its necessity and urgency day by day.
Summary of the invention
The purpose of this utility model be a kind of high burning efficiency of design, low NOx generating capacity, simple in structure, control is convenient, satisfy general industry kiln and the practical powdered coal burner that requires of middle-size and small-size Industrial Boiler.Also can many this kind burners be installed, to satisfy the requirement of large-sized boiler on same boiler by taking suitable arrangement.
A kind of low pollution mainly is made of coal dust burner 12 and 9 two parts of coal dust precombustion chamber from the preheating powdered coal burner, it is characterized in that coal dust burner and precombustion chamber coaxial arrangement, and is installed on the center of precombustion chamber head.
Coal dust burner 12 comprises pulverized coal conveying central tube 1, wind house steward 2, an air main 3 of band cyclone, the once auxilliary airduct 4 and the ring-type coal nozzle 7 of band coal gas burner cyclone, pulverized coal conveying central tube 1 and air main 3 coaxial nested arrangement.One time wind house steward 2 connects an air main 3 and once assists airduct 4, one time air main 3 inlets are equipped with cyclone, outlet is equipped with the ring-type coal nozzle, coal dust central tube 1 passes a wind house steward 2 and communicates with an air main before the ring-type coal nozzle, and one time wind is divided into a main air and once assists wind by cyclone.One time main air works the screw form of revolving into through cyclone, mixes with a main air of screw before the ring-type coal nozzle from coal, the gas mixture of central tube 1, sprays through coal nozzle.Coal nozzle is designed to the reducing circulus, is diminished gradually by air main direction diameter of the wind comes from, and its final centre bore area of section is 20～60% of an air main area of section, adapts to the steady combustion demand of different coals and ature of coal.The once auxilliary airduct of band coal gas burner cyclone and pulverized coal conveying central tube 1 axis in the same way, greater than the circumference equal intervals of an air main or be circumferential weld shape layout, this radius of a circle is 1.5～2 times an of air main.The once auxilliary airduct center of each band coal gas burner cyclone can feed combustion gas, and periphery is the once auxilliary wind passage of band swirl vane, and once auxilliary airduct 4 has the function of gas ignition.Can give coal dust primary combustion zone supplemental oxygen through swirl-flow devices by the auxilliary wind that auxilliary airduct 4 once comes out, also have the effect of stable pulverized coal flame, again the secondary main air played insulating effect simultaneously, guarantee the combustion gas mixing of the too early and precombustion chamber of secondary main air.Be the once quantity of auxilliary airduct 4 that circumference is equidistantly arranged, can adjust,, can suitably increase its quantity, to improve ignition intensity to the difficulty coal dust that catches fire according to the ignition character of the coal dust that uses.
Because a main air adopts the mode of screw, can be at the low oxygen area that forms certain volume and shape near the back segment flame of coal nozzle exit position, suppress the higher a large amount of generations that cause NOx of coal dust firing peak temperature, be beneficial to the reduction that has generated NOx simultaneously.And because the design feature of coal nozzle, make the small particle diameter coal dust in the enrichment of coal nozzle outer circumference, a main air that rotatablely moves, the auxilliary wind space of between coal nozzle and once auxilliary wind nozzle, causing a low pressure once, form the recirculation of air-flow at this place, high-temperature combustion gas is drawn back, improve the ignitability of coal dust, played the effect of stablizing pulverized coal flame.Once auxilliary wind can intercept the burning that the secondary main air participates in coal dust too early again preferably, realizes the fired state of classification, segmentation.
Coal dust precombustion chamber 9 is inside and outside nested double-decker, comprises secondary main air cyclone 5, secondary air channel 6, and secondary is assisted wind cyclone 8, secondary wind house steward 10, secondary main air guiding awl 11.The secondary wind of being come in by secondary wind house steward 10 is divided into secondary main air and the auxilliary wind of secondary by secondary air channel at the precombustion chamber port of export, the secondary main air is folded to the opposite end of precombustion chamber, enters precombustion chamber by secondary main air guiding awl 11 guiding behind secondary main air cyclone 5 eddy flows.The auxilliary wind cyclone 8 of secondary along the circumferential direction is circumferential weld on the precombustion chamber end wall arranges, the auxilliary wind of secondary acts on the high temperature gas flow of precombustion chamber ejection with 20 °～45 degree through the auxilliary wind cyclone 8 of secondary.
Secondary wind (account for total combustion air volume 70～80%) can absorb the heat of precombustion chamber housing, reaches the effect of preheating secondary combustion air and protection precombustion chamber metal shell.After the secondary main air enters precombustion chamber, travel forward in a spiral manner along the precombustion chamber inwall, constantly absorb the heat of precombustion chamber inwall and the radiant heat of high temperature gas flow, temperature constantly raises.This secondary main air through preheating meets, mixes with central gas stream on the front and back position of precombustion chamber outlet, participates in the second-time burning of coal dust; The auxilliary wind of secondary acts on the high temperature gas flow of precombustion chamber ejection, intervenes the interior oxygen supply state of high temperature gas flow and the combustion kinetics condition on uncombusted coal dust surface, accelerates the burning velocity of coal dust.
Owing to adopted above-mentioned burner structure and air feed, coal supply measure, the utlity model has following practical function:
(1). swirling motion and fractional combustion make coal dust firing more abundant, and flame is more stable;
(2). the existence of low oxygen area can effectively suppress the formation of NOx, and promotes the reduction produced NOx;
(3). high-temp waste gas is evenly distributed on the vertical cross-section in combustion chamber (as: boiler cavity), there is no furnace wall slagging scorification and high temperature corrosion phenomenon and takes place;
(4). good coal adaptive capacity is arranged;
(5). the coupling adjustment by primary air flow, secondary air flow and coal supply powder amount, can realize the stable operation under the underload;
(6). control is simple, and operating cost is cheap.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is a coal dust burner end view;
Fig. 3 is a coal dust precombustion chamber end view.
The 1st, the center coal chute, 2 is wind house stewards, the 3rd, and an air main of band cyclone, the 4th, the once auxilliary airduct of band coal gas burner cyclone, the 5th, secondary main air cyclone, the 6th, secondary air channel, the 7th, the ring-type coal nozzle, the 8th, secondary is assisted the wind cyclone, the 9th, preheating chamber, the 10th, secondary wind house steward, the 11st, secondary main air guiding awl, the 12nd, coal dust burner.
The specific embodiment
When the utility model is installed, central air hose 1 is connected the coal dust carrier pipe, and a wind house steward connects primary air fan or pressure air, and secondary air channel connects overfire air fan or pressure air, the coal dust precombustion chamber is inserted an end of horizontal industrial kiln or pulverized-coal fired boiler, and is fixed on the coal dust body of heater.
The utility model operation sequence is as follows: but at first open the combustion powder that accumulates in the clean combustion chamber of secondary wind.After about 30 seconds, open primary air fan or (during the working pressure air) and open the wind steam supply valve one time, open igniting burnt gas switch valve then, and light by ignitor; When the ignition flame temperature meets the requirements of boundary value, begin to give the coal supply of coal dust burner by central tube, implement the pulverized coal ignition operation.Lighted and when the burner front end forms the retention flame, cut off the igniting combustion gas at coal dust, burnt by coal dust oneself fully.In the process of coal combustion, can realize that coal dust fully burns and the control of useless flue gas oxygen gesture according to flow and ratio for wind of powder amount adjusting and secondary wind; Also can regulate the position of pulverized coal flame in addition,, realize the controlled burning of coal dust to adapt to the burning feature of different coals by the ratio of wind of adjustment and secondary wind.
The utility model because taked the spiral of the hierarchical segmented supply of combustion air, coal dust to move ahead, Secondary Air inhales The auxiliary wind of temperature, secondary of receiving the radiant heat of precombustion chamber body heat and high temperature gas flow and improving self is to coal powder second The controlling party of the intervention of uncombusted coal dust firing reacting dynamics condition and improvement, simple and flexible in the combustion zone Method, thereby have the significantly variation and few to the coal restriction of flameholding, low NOx, efficient, suitable load Characteristics, be widely used in general coal-fired industrial furnace and middle-size and small-size environment-friendly high-efficiency pulverized-coal fired boiler, also can simultaneously The mode that adopts many tablecloths to put satisfies the heat demand of large-sized boiler.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620134283 CN200968599Y (en) | 2006-11-07 | 2006-11-07 | Low-polluting and self-prewarming powdered coal burner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200620134283 CN200968599Y (en) | 2006-11-07 | 2006-11-07 | Low-polluting and self-prewarming powdered coal burner |
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| CN200968599Y true CN200968599Y (en) | 2007-10-31 |
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| CN 200620134283 CN200968599Y (en) | 2006-11-07 | 2006-11-07 | Low-polluting and self-prewarming powdered coal burner |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725969B (en) * | 2010-01-19 | 2011-08-17 | 中国计量学院 | Low-NOx pulverized coal burner |
| CN102200388A (en) * | 2011-04-07 | 2011-09-28 | 张晓东 | Heating furnace device of heat-accumulating-type flue gas heat waste recovery and low nitrogen oxide |
| CN102418997A (en) * | 2011-11-24 | 2012-04-18 | 舒瑞 | Combustion method and device for pulverized coal hot air furnace |
| CN102563635A (en) * | 2012-01-10 | 2012-07-11 | 西安交通大学 | Pulverized coal flame preheating combustion device |
| CN103791493A (en) * | 2014-01-17 | 2014-05-14 | 西安交通大学 | Pulverized coal flame preheating reburning system |
| CN103939903A (en) * | 2014-04-01 | 2014-07-23 | 西安交通大学 | Efficient counter-distributary self-preheating low-NOx combustion device |
| CN105042635A (en) * | 2015-07-15 | 2015-11-11 | 长沙有色冶金设计研究院有限公司 | Igniting device of continuous strand sinter machine |
| CN105135671A (en) * | 2015-09-10 | 2015-12-09 | 河南陆德筑机股份有限公司 | Multistage air distribution pulverized coal combustion hot blast stove |
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| CN110307561A (en) * | 2018-03-20 | 2019-10-08 | 中国科学院工程热物理研究所 | Coal dust fluidization is from preheating device and method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101725969B (en) * | 2010-01-19 | 2011-08-17 | 中国计量学院 | Low-NOx pulverized coal burner |
| CN102200388A (en) * | 2011-04-07 | 2011-09-28 | 张晓东 | Heating furnace device of heat-accumulating-type flue gas heat waste recovery and low nitrogen oxide |
| CN102418997A (en) * | 2011-11-24 | 2012-04-18 | 舒瑞 | Combustion method and device for pulverized coal hot air furnace |
| CN102563635A (en) * | 2012-01-10 | 2012-07-11 | 西安交通大学 | Pulverized coal flame preheating combustion device |
| CN102563635B (en) * | 2012-01-10 | 2013-12-11 | 西安交通大学 | Pulverized coal flame preheating combustion device |
| CN103791493B (en) * | 2014-01-17 | 2016-03-30 | 西安交通大学 | Pulverized coal flame preheating fires system again |
| CN103791493A (en) * | 2014-01-17 | 2014-05-14 | 西安交通大学 | Pulverized coal flame preheating reburning system |
| CN103939903A (en) * | 2014-04-01 | 2014-07-23 | 西安交通大学 | Efficient counter-distributary self-preheating low-NOx combustion device |
| CN105042635A (en) * | 2015-07-15 | 2015-11-11 | 长沙有色冶金设计研究院有限公司 | Igniting device of continuous strand sinter machine |
| CN105135671A (en) * | 2015-09-10 | 2015-12-09 | 河南陆德筑机股份有限公司 | Multistage air distribution pulverized coal combustion hot blast stove |
| CN105135671B (en) * | 2015-09-10 | 2017-10-13 | 河南陆德筑机股份有限公司 | A kind of many level air-distribution coal dust firing hot-blast stoves |
| CN110307561A (en) * | 2018-03-20 | 2019-10-08 | 中国科学院工程热物理研究所 | Coal dust fluidization is from preheating device and method |
| CN110043898A (en) * | 2019-04-10 | 2019-07-23 | 清华大学 | Multistage reflux reverse spray type vortex burner |
| CN110043898B (en) * | 2019-04-10 | 2020-02-21 | 清华大学 | Multi-stage backflow reverse-spraying type cyclone pulverized coal burner |
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Effective date of registration: 20100513 Address after: Bei Yi Jing Xiang Cao Jia Zhuang Cun 034016 Shanxi province Xinzhou Xinfu District North Patentee after: Shanxi Lantian Environmantal Engineering Co., Ltd. Address before: 100083 Haidian District, Xueyuan Road, No. 30, Patentee before: University of Science and Technology Beijing |
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Free format text: CORRECT: ADDRESS; FROM: 100083 NO.30 XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING TO: 034016 CAOJIAZHUANG VILLAGE NORTH, BEIYIJING TOWNSHIP, XINFU DISTRICT, XINZHOU CITY, SHANXI PROVINCE |
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Owner name: SHANXI LANTIAN ENVIRONMENTAL FRIENDLY EQUIPMENT CO Free format text: FORMER OWNER: BEIJING UNIVERSITY OF SCIENCE AND TECHNOLOGY Effective date: 20100513 |
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