CN201772450U - Low-NOx solid-liquid deslagging double-whirl pulverized coal combustion device - Google Patents

Low-NOx solid-liquid deslagging double-whirl pulverized coal combustion device Download PDF

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Publication number
CN201772450U
CN201772450U CN2010201993235U CN201020199323U CN201772450U CN 201772450 U CN201772450 U CN 201772450U CN 2010201993235 U CN2010201993235 U CN 2010201993235U CN 201020199323 U CN201020199323 U CN 201020199323U CN 201772450 U CN201772450 U CN 201772450U
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CN
China
Prior art keywords
coal
wind
combustion
low
dust
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CN2010201993235U
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Chinese (zh)
Inventor
潘玉明
郑雯平
贾明生
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上海题桥能源科技发展有限公司
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Priority to CN2010201993235U priority Critical patent/CN201772450U/en
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Abstract

The utility model provides a low-NOx solid-liquid deslagging double-whirl pulverized coal combustion device, which comprises a combustion chamber assembly. A burner is arranged at the front end of the combustion chamber assembly; the rear end of the combustion chamber assembly is connected with a secondary air chamber; and a primary air/pulverized coal nozzle is arranged inside the secondary air chamber. The low-NOx solid-liquid deslagging double-whirl pulverized coal combustion device is characterized in that a work liner wraps the outside of the combustion chamber assembly, a cooling water jacket part wraps the outside of the work liner, a whirl blade grid is arranged on the primary air/pulverized coal nozzle, and a primary air/pulverized coal feeding device is connected with the primary air/pulverized coal nozzle. The low-NOx solid-liquid deslagging double-whirl pulverized coal combustion device has the advantages of sufficient combustion, remarkable energy saving and emission reducing effects and prolonged service life. Currently, tens of thousands of 2-35 ton steam and hot water industrial boilers, furnaces and kilns are nationally used, and huge emission-reduction social benefits and amazing energy-saving economic gains can be obtained if the boilers, the furnaces and the kilns are improved according to the technical scheme of the low-NOx solid-liquid deslagging double-whirl pulverized coal combustion device.

Description

Low-NOx dry and wet deslagging dual-swirl coal-dust combustion device

Technical field

The utility model relates to a kind of low-NOx dry and wet deslagging dual-swirl coal-dust combustion device, be applicable to 2-35 ton steam, hot-water boiler, stove, forging, chemical industry, weaving, papermaking, steel-making, road and bridge blending station and various industrial production such as cold aggregate heating to the burner of heat energy demand, belong to the coal burner technical field.

Background technology

Grate firing boiler is the type of furnace of present Industrial Boiler extensive use, is made up of critical pieces such as pressure-containing parts, traveling-grate stokers, and bunker coal is layer combustion on fire grate, during burning and Air mixing insufficient, cause burning not thoroughly, low, the q of burnout rate 4Loss is big, and waste is coal-fired, and smoke evacuation contains NOx, SO 2, the dust concentration height, contaminated environment.For addressing these problems, the applicant had applied on 02 12nd, 2007 once that name was called " low NOx axial eddy pulverized-coal burner " utility model patent (publication number is CN201014436).Applied for that on June 11st, 2007 name is called the utility model patent (application number is 200710110815.5) of " low NOx multi-tube axial eddy pulverized-coal burner " again, but these two kinds of burnings are had a high regard for and are so had following shortcoming: 1, owing to be the combustion system of a wind, coal dust firing is abundant not enough; 2, because the ignition temperature of burner is very high, thereby influence the service life of burner.

In order to address the above problem, the applicant has applied for that on July 28th, 2008 name is called the utility model patent (publication number is CN201293314Y) of " low NOx liquid state slag-off double-eddy flow coal-powder combustor ".Though this coal burner has adopted the combustion system of twice wind, but find to exist following defective through practice: 1, because Industrial Boiler load variations in running is frequent and fluctuating range is big, the patented product adaptability to load variations in application is bad; 2, deslagging has some setbacks, easily slag-drip opening climb slag long-term between operation cause cinder notch to stop up even blowing out.

Summary of the invention

The purpose of this utility model provides a kind of requirement that can satisfy the Industrial Boiler load variations, deslagging smooth and easy can dry ash extraction again can slag tap, guarantee the coal powder burner of long-term safety stable operation.

In order to achieve the above object, the technical solution of the utility model has provided a kind of low-NOx dry and wet deslagging dual-swirl coal-dust combustion device, comprise the combustion chamber assembly, front end at the combustion chamber assembly is provided with bocca, the rear end of combustion chamber assembly links to each other with secondary air chamber, a wind/coal nozzle of combustion chamber assembly is located in the secondary air chamber, it is characterized in that, assembly is wrapped with working lining in the combustion chamber, be wrapped with the cooling water external member at working lining, be provided with the eddy flow leaf grating on a wind/coal nozzle, one time wind/coal dust feeding unit links to each other with a wind/coal nozzle.

Further, described working lining comprises the ambiguity refractory masses, is provided with cylindricality heat-conducting metal anchoring piece in the ambiguity refractory masses.

Described cooling water external member comprises cover and cooling water overcoat in the cooling water, puts outside cooling water and is provided with cooling water outlet pipe and cooling water inlet pipe.

A described wind/coal dust feeding unit comprises wind/coal pipe flange one time, one time wind/coal pipe flange connects a wind/coal dust current equalizer and a wind/coal pipe successively, on a wind/coal pipe, be provided with wind/coal dust shower nozzle one time, outside a wind/coal dust shower nozzle, be with wind/coal powder cyclone blade of a circle.

Described eddy flow leaf grating is made up of 6-12 sheet swirl vane.

Outside a described wind/coal dust shower nozzle, be with the described wind of 3-12 sheet/coal powder cyclone blade.

The length L 1 of described swirl vane is 80-120mm, and height H 1 is 30-50mm, and thickness is 1-5mm.

The length L 2 of a described wind/coal powder cyclone blade is 300-400mm, and height H 2 is 90-110mm, and thickness D1 is 4-8mm, and inclination alpha is 6 °~45 °.

Bottom at described bocca is provided with slag-drip opening, and slag-drip opening connects the combustion chamber assembly, is provided with to catch the slag screen in slag-drip opening.

The diameter proportion of described bocca and combustion chamber assembly is 35%~85%.

The utility model makes the coal powder/air mist divide section, combustion with meagre oxygen in burner, thereby produces reduction reaction, makes the nitrogen oxide reduction:

CO+NO→CO 2+N 2

H 2+NO→N 2+H 2O

CH i+NO→HCN+O

HCN+NO → N 2+ ... (excess air coefficient α<1)

NO+C→N 2+CO

From the product of above-mentioned reaction equation as can be seen, the generation of NOx is suppressed, and reaches clean combustion, obtains the effect that NOx reduces discharging;

The utility model increases a wind/current equalizer, adopts part section control burning of coaxial bispin stream, makes that 150~300 purpose granule coal dusts can mix with hot-air fully, burning velocity is fast, and burnout rate is up to 99.5%; Liquid retention efficiency is higher than more than 85%, and (its liquid lime-ash contains SiO to the dust concentration in the reduction smoke evacuation 260%, contains Al 2O 325% all is raw materials for production of potassium base sodium metasilicate and alumina silicate, silica gel product), reduce smoke discharge amount;

The utility model is provided with cooling jacket at the combustion chamber cylindrical shell, and with the working lining of combustion chamber cylinder inboard wall as heat insulation layer, improve service life of the present utility model.

The utility model has the advantages that sufficient combustion, effects of energy saving and emission reduction is remarkable, and prolong service life.At present, 2-35 ton steam, hot water Industrial Boiler, the stove that use in the whole nation are thousands of, transform according to the technical solution of the utility model, will produce huge reduction of discharging social benefit, can obtain surprising energy saving economy achievement again.

Description of drawings

The structural representation of a kind of low-NOx dry and wet deslagging dual-swirl coal-dust combustion device that Fig. 1 provides for the utility model;

Fig. 2 is the working lining structural representation;

Fig. 3 is that the C of Fig. 1 is to view;

Fig. 4 is a wind/coal dust feeding unit schematic diagram;

Fig. 5 is an eddy flow leaf grating phantom;

Fig. 6 is an eddy flow leaf grating expanded view;

Fig. 7 is a wind/coal powder cyclone blade schematic diagram.

The specific embodiment

Specify the utility model below in conjunction with embodiment.

Embodiment

As shown in Figure 1, a kind of low-NOx dry and wet deslagging dual-swirl coal-dust combustion device for the utility model provides comprises combustion chamber assembly 1, is provided with bocca 7 at the front end of combustion chamber assembly 1, and bocca 7 is 35%~85% with the diameter proportion of combustion chamber assembly 1.The rear end of combustion chamber assembly 1 links to each other with secondary air chamber 4, a wind/coal nozzle 5 of combustion chamber assembly 1 is located in the secondary air chamber 4, be wrapped with working lining 2 at combustion chamber assembly 1, be wrapped with cooling water external member 3 at working lining 2, on a wind/coal nozzle 5, be provided with eddy flow leaf grating 6, the relative axial position of a ring-type eddy flow leaf grating 6 and a wind/coal nozzle 5 is 0~650mm, and the diameter of ring-type secondary wind eddy flow leaf grating 6 is smaller or equal to the internal diameter of combustion chamber assembly 1 and more than or equal to the external diameter of a wind/coal nozzle 5.One time wind/coal dust feeding unit 8 links to each other with a wind/coal nozzle 5.

As shown in Figure 2, working lining 2 comprises the cylindricality heat-conducting metal anchoring piece 18 that is welded on the interior cover of the cooling water wall.The diameter of cylindricality heat-conducting metal anchoring piece 18 is that 4~30mm, length are the metal column of 10mm~250mm or with the metal tube of diameter.Spacing between the cylindricality heat-conducting metal anchoring piece 18 is 10mm~250mm.Comprise that also thickness is the ambiguity refractory masses 17 of 10mm~250mm.

As shown in Figure 1, described cooling water external member 3 comprises cover 12 and cooling water overcoat 11 in the cooling water, is provided with cooling water outlet pipe 10 and cooling water inlet pipe 19 on cooling water overcoat 11.

As shown in Figure 4, a described wind/coal dust feeding unit 8 comprises wind/coal pipe flange 20 one time, one time wind/coal pipe flange 20 connects a wind/coal dust current equalizer 21 and a wind/coal pipe 22 successively, on a wind/coal pipe 22, be provided with wind/coal dust shower nozzle 24 one time, outside a wind/coal dust shower nozzle 24, be with wind/coal powder cyclone blade 23 of a circle.

As Fig. 5 and shown in Figure 6, described eddy flow leaf grating 6 is made up of 6-12 sheet swirl vane 25.As shown in Figure 5, the length L 1 of described swirl vane 25 is 80-120mm, and height H 1 is 30-50mm, and thickness is 1-5mm.

As shown in Figure 4, outside a described wind/coal dust shower nozzle 24, be with the described wind of 3-12 sheet/coal powder cyclone blade 23.

As shown in Figure 7, the length L 2 of a described wind/coal powder cyclone blade 23 is 300-400mm, and height H 2 is 90-110mm, and thickness D1 is 4-8mm, and inclination alpha is 6 °~45 °.

As Fig. 1 and shown in Figure 3, be provided with slag-drip opening 16 in the bottom of described bocca 7.The bottom of the U-shaped bottom of slag-drip opening and the working lining 2 of combustion chamber assembly 1 is on same circumference, and width is 50mm~500mm, and length is 150mm~800mm.Slag-drip opening 16 connects combustion chamber assembly 1, is provided with to catch slag screen 13 in slag-drip opening 16.

The utility model uses two class bituminous coal of certain fineness.One time wind/coal dust goes down to organize strong swirling eddy in the effect of secondary wind tangential gas flow, in the process of most of coal dust adherent rotational flow under the effect of high temperature centrifugal flow, the rapid overheavy firing of molten ash laminar surface on the working lining 2 of combustion chamber assembly 1, liquefaction, because the very low flow at high speed with secondary wind of the deadweight and the viscous effect speed of service forms very big relative velocity, make that molten slag is adherent to move down, discharge burner at the slag chute that the effect lower edge of catching slag screen 13 is set.

Claims (10)

1. low-NOx dry and wet deslagging dual-swirl coal-dust combustion device, comprise combustion chamber assembly (1), front end at combustion chamber assembly (1) is provided with bocca (7), the rear end of combustion chamber assembly (1) links to each other with secondary air chamber (4), a wind/coal nozzle (5) of combustion chamber assembly (1) is located in the secondary air chamber (4), it is characterized in that, be wrapped with working lining (2) at combustion chamber assembly (1), be wrapped with cooling water external member (3) at working lining (2), be provided with eddy flow leaf grating (6) on a wind/coal nozzle (5), one time wind/coal dust feeding unit (8) links to each other with a wind/coal nozzle (5).
2. a kind of low-NOx dry and wet deslagging dual-swirl coal-dust combustion device as claimed in claim 1, it is characterized in that, described working lining (2) comprises ambiguity refractory masses (17), is provided with cylindricality heat-conducting metal anchoring piece (18) in ambiguity refractory masses (17).
3. a kind of low-NOx dry and wet deslagging dual-swirl coal-dust combustion device as claimed in claim 1, it is characterized in that, described cooling water external member (3) comprises cover (12) and cooling water overcoat (11) in the cooling water, is provided with cooling water outlet pipe (10) and cooling water inlet pipe (19) on cooling water overcoat (11).
4. a kind of low-NOx dry and wet deslagging dual-swirl coal-dust combustion device as claimed in claim 1, it is characterized in that, a described wind/coal dust feeding unit (8) comprises wind/coal pipe flange (20) one time, wind/coal pipe flange (20) connects a wind/coal dust current equalizer (21) and a wind/coal pipe (22) successively, on a wind/coal pipe (22), be provided with wind/coal dust shower nozzle (24) one time, outside a wind/coal dust shower nozzle (24), be with wind/coal powder cyclone blade (23) of a circle.
5. a kind of low-NOx dry and wet deslagging dual-swirl coal-dust combustion device as claimed in claim 1 is characterized in that, described eddy flow leaf grating (6) is made up of 6-12 sheet swirl vane (25).
6. a kind of low-NOx dry and wet deslagging dual-swirl coal-dust combustion device as claimed in claim 4 is characterized in that, is with the described wind of 3-12 sheet/coal powder cyclone blade (23) outside a described wind/coal dust shower nozzle (24).
7. a kind of low-NOx dry and wet deslagging dual-swirl coal-dust combustion device as claimed in claim 5 is characterized in that, the length L 1 of described swirl vane (25) is 80-120mm, and height H 1 is 30-50mm, and thickness is 1-5mm.
8. a kind of low-NOx dry and wet deslagging dual-swirl coal-dust combustion device as claimed in claim 6, it is characterized in that the length L 2 of a described wind/coal powder cyclone blade (23) is 300-400mm, height H 2 is 90-110mm, thickness D1 is 4-8mm, and inclination alpha is 6 °~45 °.
9. a kind of low-NOx dry and wet deslagging dual-swirl coal-dust combustion device as claimed in claim 1, it is characterized in that, be provided with slag-drip opening (16) in the bottom of described bocca (7), slag-drip opening (16) connects combustion chamber assembly (1), is provided with to catch slag screen (13) in slag-drip opening (16).
10. a kind of low-NOx dry and wet deslagging dual-swirl coal-dust combustion device as claimed in claim 1 is characterized in that, described bocca (7) is 35%~85% with the diameter proportion of combustion chamber assembly (1).
CN2010201993235U 2010-05-19 2010-05-19 Low-NOx solid-liquid deslagging double-whirl pulverized coal combustion device CN201772450U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN2010201993235U CN201772450U (en) 2010-05-19 2010-05-19 Low-NOx solid-liquid deslagging double-whirl pulverized coal combustion device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101915420A (en) * 2010-05-19 2010-12-15 上海题桥能源科技发展有限公司 Low-NOx dry and wet deslagging dual-swirl coal-dust combustion device for
CN102661605A (en) * 2011-09-08 2012-09-12 上海题桥能源科技发展有限公司 Low-NOX liquid slag removal coal dust combustion apparatus possessing triple swirling flow wind

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101915420A (en) * 2010-05-19 2010-12-15 上海题桥能源科技发展有限公司 Low-NOx dry and wet deslagging dual-swirl coal-dust combustion device for
CN102661605A (en) * 2011-09-08 2012-09-12 上海题桥能源科技发展有限公司 Low-NOX liquid slag removal coal dust combustion apparatus possessing triple swirling flow wind

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Granted publication date: 20110323

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