CN103994429A - Pulverized coal burner - Google Patents

Pulverized coal burner Download PDF

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Publication number
CN103994429A
CN103994429A CN201410269128.8A CN201410269128A CN103994429A CN 103994429 A CN103994429 A CN 103994429A CN 201410269128 A CN201410269128 A CN 201410269128A CN 103994429 A CN103994429 A CN 103994429A
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coal
sleeve pipe
wind scooper
tubular shell
periphery
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CN201410269128.8A
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Chinese (zh)
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CN103994429B (en
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张友晶
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张友晶
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Priority to CN201410269128.8A priority Critical patent/CN103994429B/en
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Abstract

The invention discloses a pulverized coal burner. The pulverized coal burner comprises a tubular shell, wherein an air inlet is formed in the rear end of the tubular shell, a flame cover is arranged at the front end of the tubular shell, a flaming opening is formed in the front end of the flame cover, and the flame cover is sequentially composed of a gradually expanding part, a transition part and a gradually shrinking part in the air outlet direction; an ignition rod is mounted inside the tubular shell, a fourth sleeve is mounted on the periphery of the ignition rod, a third sleeve is mounted on the periphery of the fourth sleeve, a second sleeve is mounted on the periphery of the third sleeve, a coal feeding device is mounted on the periphery of the rear portion of the second sleeve, and a coal feeding opening of the coal feeding device is placed outside the tubular shell. Furnace drying is needless, and the maximum power of a body can be reached during ignition. The temperature inside a furnace can be maintained without depending on a high temperature and large size furnace body, so that flame continuous fierce combustion is guaranteed, and therefore pulverized coal can be fully burnt under any working condition. The size and the power specific value of the pulverized coal burner are higher than those of all existing pulverized coal combustion devices. The pulverized coal burner further has the advantages of being simple in structure, low in manufacturing cost and simple and convenient to use.

Description

Coal burner
Technical field
The present invention relates to a kind of coal burner.
Background technology
Existing coal powder burner has the following disadvantages: 1, bulky and heavy, and be difficult to transportation and install, 2 combustion efficiencies are undesirable, and coal dust firing is abundant not.Bulky, the heavy reason of existing coal powder burner is, in order to prevent that burner from being burnt by high temperature, its inside is provided with the thick flame retardant coating consisting of refractory brick; The undesirable reason of burning is, on the one hand, combustion air reduces in bocca place temperature, thereby, reduced the temperature of flame, on the other hand, combustion air is streamlined flow, not clean-burning coal dust directly blows out outside burner in a large number.
Summary of the invention
The object of this invention is to provide a kind of coal burner, flame retardant coating need not be installed in its inside, can significantly reduce volume and weight, is convenient to transportation and installs; In addition, it can utilize combustion air auto-radiating and fully stir coal dust, guarantees combustion efficiency, thereby, can solve the problem that prior art exists.
The present invention for achieving the above object, be achieved through the following technical solutions: coal burner, comprise tubular shell, air inlet is offered in the rear end of tubular shell, the front end of tubular shell is provided with flame cover, flame cover front end is offered bocca, and flame cover consists of flaring portion, transition part and convergent portion successively along air-out direction; Mounting points lighted torch in tubular shell, the periphery of fire rod is installed quadruplet, and the periphery of quadruplet is installed the 3rd sleeve pipe, and the periphery of the 3rd sleeve pipe is installed the second sleeve pipe, and the rear portion periphery of the second sleeve pipe is installed coal inlet device, and the coal feed point of coal inlet device is positioned at outside tubular shell; Blower fan is installed in tubular shell, and blower fan is positioned at coal inlet device rear; Between quadruplet and the 3rd sleeve pipe, form the first wind chamber, between the 3rd sleeve pipe and the second sleeve pipe, form defeated coal chamber.
For further realizing object of the present invention, can also be by the following technical solutions: the periphery of described the second sleeve pipe is installed the first wind scooper, the first wind scooper is that flaring is tubular, the air outlet of the first wind scooper is positioned at flame cover, looping air channel between the air outlet of the first wind scooper and flame cover, the air inlet of the first wind scooper is positioned at tubular shell or flame cover, and the angle of the first wind scooper sidewall bus and axis is α.The periphery of described the second sleeve pipe is installed the second wind scooper, the second wind scooper is that flaring is tubular, the air outlet of the second wind scooper is positioned at flame cover, looping air channel between the air outlet of the second wind scooper and flame cover, the air inlet of the first wind scooper is positioned at tubular shell or flame cover, the angle of the second wind scooper sidewall bus and axis is β, β > α, and the second wind scooper is between the first wind scooper and the second sleeve pipe.The periphery of described the second sleeve pipe is installed the first sleeve pipe, between the first sleeve pipe and the second sleeve pipe, form the second wind chamber, the front portion in the second wind chamber is provided with annular deep bead, on annular deep bead, there are several air vents, the rounded distribution centered by quadruplet of several air vents, the second sleeve pipe is positioned at the first wind scooper.Described α is less than 80 degree.The bus of described transition part sidewall is straight line.Described transition part is that the bus of sidewall is camber line.
The invention has the advantages that: though its volume is little, inner chamber is large, be convenient to flame and acutely burn.It need not baker, just can reach the peak power of body during ignition.It also need not rely on a high temperature and bulky body of heater to maintain temperature in stove, thereby guarantees that flame continues violent burning, thereby, can under any operating mode, coal dust fully be burnt.Its volume and power ratio are higher than existing all coal powder burners.The present invention also has advantages of simple in structure, cheap for manufacturing cost and easy to use.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of coal burner of the present invention; Fig. 2 is the I portion enlarged drawing of Fig. 1; Fig. 3 is the A-A sectional structure schematic diagram of Fig. 1.
Reference numeral: 29 second wind chambeies, 1 tubular shell 2 blower fan 3 blower fan holder 4 fan blade 5 first sleeve pipe 6 defeated coal through hole 7 Quadruplet pipe 8 spiral case coal inlet device 9 coal feed point 10 first wind scooper 11 second wind scooper 12 flame cover 14 first fixed bar 15 second fixed bar 16 helical blade 17 fire rodes 18 the 3rd sleeve pipe 19 second sleeve pipe 20 annular deep bead 21 air vent 22 air inlet 23 bocca 24 flaring portion 25 transition part 26 convergent portion 27 first 28Shu Mei chamber, wind chamber.
The specific embodiment
As shown in Figure 1, coal burner of the present invention, comprises tubular shell 1.Air inlet 22 is offered in the rear end of tubular shell 1, and the front end of tubular shell 1 is provided with flame cover 12, and flame cover 12 front ends are offered bocca 23.Flame cover 12 consists of flaring portion 24, transition part 25 and convergent portion 26 successively along air-out direction, so that combustion air is when flame cover 12, can form backflow wind as shown in phantom in Figure 1 along the inwall of flame cover 12, on the one hand, can absorb the heat in flame cover 12, for flame cover 12 radiating and coolings, on the other hand, backflow wind can fully stir unburned coal dust to break up, and prevents that it from directly blowing out outside flame cover 12, thereby, the oxygen in coal dust and combustion-supporting burning wind is fully burnt.As shown in Figure 2, the interior mounting points lighted torch 17 of tubular shell 1, the periphery of fire rod 17 is installed the periphery of quadruplet 7, the quadruplets 7 the 3rd sleeve pipe 18 is installed.Between the air outlet of the 3rd sleeve pipe 18 and quadruplet 7, be provided with several piece helical blade 16.The periphery of the 3rd sleeve pipe 18 is installed the rear portion periphery of the second sleeve pipe 19, the second sleeve pipes 19 coal inlet device is installed, and the coal feed point 9 of coal inlet device is positioned at outside tubular shell 1.The wind of coal dust and the powder of delivering coal can be in coal inlet device will enter the second sleeve pipe 19 after mixing.The interior installation blower fan 2 of tubular shell 1, blower fan 2 is positioned at coal inlet device rear.Between quadruplet 7 and the 3rd sleeve pipe 18, form between the first wind chamber 27, the three sleeve pipes 18 and the second sleeve pipe 19 and form defeated coal chamber 28.The combustion air that blower fan 2 provides is blown in flame cover 12 through defeated coal chamber 28 straight lines on the one hand, on the other hand, first along the space between the second sleeve pipe 19 and tubular shell 1, blows to flame cover 12, then at fire rod 17, forms backflow wind along the inwall of flame cover 12.As shown in Figure 3, several piece helical blade 16 rounded arranging centered by quadruplet 7.The wind that helical blade 16 can blow out defeated coal chamber 28, along the axis rotation of quadruplet 7, can play agitaion to coal dust, and coal dust is fully mixed with combustion air.As shown in Figure 1, the bus of described transition part 25 sidewalls is straight lines, and transition part 25 is straight tube-like, and the inwall of transition part 25 is arc surface.The bus that described transition part 25 is sidewalls is camber line, and the inwall of transition part 25 is cambered outwards spheres.Between transition part 25 and convergent portion 26 and flaring portion 24, can adopt rounding off, so that air-flow revolution is more smooth and easy.As shown in Figure 1, the length of described transition part 25 is H1, and the length of convergent portion 26 is H2, and when 5H2 >=H1 >=3H2, it is best that its flame cover 12 makes air-flow produce the backflow effect of rotating.
Operation principle:
Initial stage: when starting blower fan 2, spiral case coal inlet device 8 is interior for coal dust to the first wind chamber 27, the coal dust of the combustion air of the first wind chamber 27 ejections and 28 ejections of defeated coal chamber is at fire rod 17 ignition actions, violent burning and blast form flame, the backflow wind that flame cover 12 places blow, near rotation 28 outlets of defeated coal chamber, unburnt coal dust is broken up, it is fully mixed with combustion air.
Normal operation: after initial stage igniting, owing to there being all the time flame in flame cover 12, therefore, defeated coal chamber 28 and the first wind chamber 27 can maintain flame combustion for coal dust and combustion air, in addition, by the backflow wind of flame cover 12, in the time of to flame cover 12 heat radiation, can complete the self-preheating of combustion air, combustion air after preheating can not reduce the temperature of flame, can promote that flame acutely burns.
As shown in Figure 1, the periphery of described the second sleeve pipe 19 is installed the first wind scooper 10, the first wind scooper 10 is that flaring is tubular, the air outlet of the first wind scooper 10 is positioned at flame cover 12, looping air channel between the air outlet of the first wind scooper 10 and flame cover 12, the angle that the air inlet of the first wind scooper 10 is positioned at tubular shell 1 or flame cover 12, the first wind scooper 10 sidewall buses and axis is α.The first wind scooper 10 can be connected and fixed with tubular shell 1 or flame cover 12 by several the second fixed bars 15, also can with other fixed parts, be connected and fixed with tubular shell 1.The first wind scooper 10 coordinates with flame cover 12 can make the wind that blower fan 2 blows out form backflow wind at flame cover 12, and the wind rotation that can make to reflux is more abundant, thereby, can better and stir coal dust to flame cover 12 heat radiations.For ease of forming backflow wind, described α should be less than 80 degree.
As shown in Figure 1, the periphery of described the second sleeve pipe 19 is installed the second wind scooper 11, the second wind scooper 11 is that flaring is tubular, the air outlet of the second wind scooper 11 is positioned at flame cover 12, looping air channel between the air outlet of the second wind scooper 11 and flame cover 12, the angle that the air inlet of the first wind scooper 10 is positioned at tubular shell 1 or flame cover 12, the second wind scooper 11 sidewall buses and axis is β.β > α, can make the air outlet angle at the second wind scooper 11 places different from the first wind scooper 10.The second wind scooper 11 is between the first wind scooper 10 and the second sleeve pipe 19.The second wind scooper 11 coordinates another group backflow wind of formation with the first wind scooper 10 and flame cover 12, the second wind scooper 11 and the first wind scooper 10 form the backflow wind of different angles, can make coal dust mix with combustion air more abundant, meanwhile, can be also flame cover 12 heat radiations more efficiently.The second wind scooper 11 can be connected and fixed by the first fixed bar 14 and the first wind scooper 10, also can be connected and fixed with other fixed parts in tubular shell 1.
Combustion-supporting for further coal dust being carried out, guarantee that coal dust fully burns, as depicted in figs. 1 and 2, the periphery of described the second sleeve pipe 19 is installed between the first sleeve pipe 5, the first sleeve pipes 5 and the second sleeve pipe 19 and is formed the second wind chamber 29.The front portion in the second wind chamber 29 is provided with annular deep bead 20, has several air vents 21 on annular deep bead 20.Several air vents 21 can quadruplet 7 centered by rounded distribution so that balanced ventilation, in addition, the adjustable different air output of the air vent 21 of different-diameter.The second sleeve pipe 19 is positioned at the first wind scooper 10.If interior installation the second wind scooper 11 of the first wind scooper 10, the second sleeve pipe 19 is positioned at the second wind scooper 11.
As shown in Figure 3, described coal inlet device is spiral case coal inlet device 8, and spiral case coal inlet device 8 is to the interior baking coal in defeated coal chamber 28.Spiral case coal inlet device 8 may be crossed defeated coal through hole 6 on the second sleeve pipe 19 to defeated coal chamber 28 interior balanced ventilation and coal dusts, and can make coal powder spiral advance, and coal dust is fully mixed, so that coal dust fully fires powder with combustion air.
Technical scheme of the present invention is not restricted in the scope of embodiment of the present invention.

Claims (10)

1. coal burner, it is characterized in that: comprise tubular shell (1), air inlet (22) is offered in the rear end of tubular shell (1), the front end of tubular shell (1) is provided with flame cover (12), flame cover (12) front end is offered bocca (23), and flame cover (12) consists of flaring portion (24), transition part (25) and convergent portion (26) successively along air-out direction; The interior mounting points lighted torch of tubular shell (1) (17), the periphery of fire rod (17) is installed quadruplet (7), the periphery of quadruplet (7) is installed the 3rd sleeve pipe (18), the periphery of the 3rd sleeve pipe (18) is installed the second sleeve pipe (19), the rear portion periphery of the second sleeve pipe (19) is installed coal inlet device, and the coal feed point of coal inlet device (9) is positioned at outside tubular shell (1); Blower fan (2) is installed in tubular shell (1), and blower fan (2) is positioned at coal inlet device rear; Between quadruplet (7) and the 3rd sleeve pipe (18), form the first wind chamber (27), between the 3rd sleeve pipe (18) and the second sleeve pipe (19), form defeated coal chamber (28).
2. coal burner according to claim 1, it is characterized in that: the periphery of described the second sleeve pipe (19) is installed the first wind scooper (10), the first wind scooper (10) is that flaring is tubular, the air outlet of the first wind scooper (10) is positioned at flame cover (12), looping air channel between the air outlet of the first wind scooper (10) and flame cover (12), the air inlet of the first wind scooper (10) is positioned at tubular shell (1) or flame cover (12), and the angle of the first wind scooper (10) sidewall bus and axis is α.
3. coal burner according to claim 2, it is characterized in that: the periphery of described the second sleeve pipe (19) is installed the second wind scooper (11), the second wind scooper (11) is that flaring is tubular, the air outlet of the second wind scooper (11) is positioned at flame cover (12), looping air channel between the air outlet of the second wind scooper (11) and flame cover (12), the air inlet of the first wind scooper (10) is positioned at tubular shell (1) or flame cover (12), the angle of the second wind scooper (11) sidewall bus and axis is β, β > α, the second wind scooper (11) is positioned between the first wind scooper (10) and the second sleeve pipe (19).
4. coal burner according to claim 2, it is characterized in that: the periphery of described the second sleeve pipe (19) is installed the first sleeve pipe (5), between the first sleeve pipe (5) and the second sleeve pipe (19), form the second wind chamber (29), the front portion in the second wind chamber (29) is provided with annular deep bead (20), on annular deep bead (20), there are several air vents (21), several air vents (21) rounded distribution centered by quadruplet (7), the second sleeve pipe (19) is positioned at the first wind scooper (10).
5. coal burner according to claim 2, is characterized in that: described α is less than 80 degree.
6. coal burner according to claim 2, is characterized in that: the bus of described transition part (25) sidewall is straight line.
7. coal burner according to claim 2, is characterized in that: described transition part (25) is that the bus of sidewall is camber line.
8. coal burner according to claim 1, is characterized in that: described coal inlet device is spiral case coal inlet device (8), and spiral case coal inlet device (8) is the interior coal that dries to defeated coal chamber (28).
9. coal burner according to claim 1, is characterized in that: between the air outlet of described the 3rd sleeve pipe (18) and quadruplet (7), be provided with several piece helical blade (16).
10. coal burner according to claim 1, is characterized in that: the length of described transition part (25) is H1, and the length of convergent portion (26) is H2, H1 >=3H2.
CN201410269128.8A 2014-06-17 2014-06-17 Coal burner Active CN103994429B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410269128.8A CN103994429B (en) 2014-06-17 2014-06-17 Coal burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410269128.8A CN103994429B (en) 2014-06-17 2014-06-17 Coal burner

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CN103994429A true CN103994429A (en) 2014-08-20
CN103994429B CN103994429B (en) 2016-03-02

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4157889A (en) * 1976-04-16 1979-06-12 Societe Colmant Cuvelier Burner for powdered fuel
JP2009074782A (en) * 2007-09-19 2009-04-09 Yukio Ishii Hydration fuel combustion device
WO2010023902A1 (en) * 2008-08-26 2010-03-04 株式会社ブイエスディー Gasification and combustion device
CN102944014A (en) * 2012-10-22 2013-02-27 瑞焓能源科技有限公司 Industrial boiler burner and industrial boiler with same
CN203099814U (en) * 2012-12-18 2013-07-31 杭州燃油锅炉有限公司 Pulverized coal burner
CN203893173U (en) * 2014-06-17 2014-10-22 张友晶 Pulverized coal burner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4157889A (en) * 1976-04-16 1979-06-12 Societe Colmant Cuvelier Burner for powdered fuel
JP2009074782A (en) * 2007-09-19 2009-04-09 Yukio Ishii Hydration fuel combustion device
WO2010023902A1 (en) * 2008-08-26 2010-03-04 株式会社ブイエスディー Gasification and combustion device
CN102944014A (en) * 2012-10-22 2013-02-27 瑞焓能源科技有限公司 Industrial boiler burner and industrial boiler with same
CN203099814U (en) * 2012-12-18 2013-07-31 杭州燃油锅炉有限公司 Pulverized coal burner
CN203893173U (en) * 2014-06-17 2014-10-22 张友晶 Pulverized coal burner

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