CN101070956A - Coal-water slurry combustion method and its combustion equipment - Google Patents
Coal-water slurry combustion method and its combustion equipment Download PDFInfo
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- CN101070956A CN101070956A CN 200610078892 CN200610078892A CN101070956A CN 101070956 A CN101070956 A CN 101070956A CN 200610078892 CN200610078892 CN 200610078892 CN 200610078892 A CN200610078892 A CN 200610078892A CN 101070956 A CN101070956 A CN 101070956A
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Abstract
The invention relates to a methods and combustion equipment for burning coal water mixture, the method is that atomized coal water mixture is spurted in combustion chamber for suspension combustion, combustion flame gradually form high temperature gas in process of flowing forward, make the combustion-supporting air form a suspension combustion-supporting air driving field in hearth and return some proper high temperature gas to suspension combustion chamber burning again. After exchanging heat the gas is exhausted by chimney. The combustion equipment consists of hearth and coal water mixture jet combustion engine, the combustion chamber is in the hearth, the hearth at the injection end of coal water mixture are installed with main air duct, damper as well as many air doors. The method and equipment can combust the coal water mixture completely, and automatic discharge ash, increasing combustion ratio of coal water mixture to the ultimate can save energy and protect environment.
Description
Technical field
The present invention relates to a kind of cool water mixture burning method and combustion apparatus thereof.
Background technology
Water-coal-slurry is a kind of novel coal-based clean fuel, and it can replace heavy oil, diesel oil, natural gas to carry out industry heating, can be used for boiler improvement again, and it has the characteristics energy-efficient, cheap, that disposal of pollutants is few.
The inventor once proposed the patent application (publication number be CN 1553077A) of denomination of invention for " a kind of combustion method of coal water slurry fuel and combustion apparatus " on July 25th, 2003 to Patent Office of the People's Republic of China, a kind of available various coal water slurry fuel overheavy firings and automatic slag removal are disclosed in this patent, deashing, supercharging air is for the water-coal-slurry intensifying combustion mothod and the burner of slurry global optimization, promptly burner hearth evenly is distributed as once and burns with secondary overheavy firing zone, the pairing burner of this combustion method also has automatic slag removal simultaneously, deashing, supercharging air is for functions such as slurries, this combustion method has not only improved the efficient of burning, and lime-ash can be removed automatically, and reduced operating cost.But in the method, the water-coal-slurry atomized fuel is shorter the burning time in burner hearth, does not reach completing combustion, has still wasted a certain amount of water-coal-slurry resource, causes the waste of the energy.
In addition, build engineering pitch building stones heating mixing plant for the road, because transportation range all need be followed the road and be built the job site transfer, therefore its pitch building stones of heating mixing plant are stirred the nucleus equipment hot-blast stove of rotary kiln, not only combustion energy saving has been proposed, and the discharging environmental protection, and possess the requirement that the excellent combination property of convenient transportation is moved in dismounting simultaneously, and hot-blast stove of the prior art can't satisfy this demand.
Summary of the invention
Technical problem to be solved by this invention is at existing above-mentioned deficiency in the prior art, provide a kind of make cool water mixture burning fully, can improve the combustion method and the combustion apparatus thereof of the water-coal-slurry of water-coal-slurry slurry burnout rate, easy for installation, energy-conserving and environment-protective to greatest extent.
The technical scheme that solution the technology of the present invention problem is adopted is the combustion method of this water-coal-slurry, wherein, to spray into the combustion chamber suspension combustion through the water-coal-slurry of atomizing, combustion flame is progressively forming high-temperature flue gas in the process of flowing forward, make combustion air in burner hearth, form suspension combustion air aerodynamic field, and an amount of high temperature gases recirculating is burnt away in the suspension combustion chamber, flue gas is discharged by chimney after heat exchange.
Described suspension combustion air aerodynamic field is to enter the combustion air of combustion chamber after coarse adjustment, regulates through air register, regulates through air door repeatedly and mixes that the back forms.
Preferably, water-coal-slurry and combustion air flow to the furnace flame outlet with the angle with 7-15 ° of horizontal line inclination, strengthen suspension combustion air aerodynamic field, favourable an amount of high temperature gases recirculating, a large amount of volatile matters and part carbon granule in the water-coal-slurry atomization air flow, the heat-exchanger rig that can enter outside the burner hearth after furnace flame outlet ejection burns away.Like this, combustion method of the present invention has formed suspension settlement in the burner hearth and has returned stove and heavily burn mixed combustion zone and burner hearth continuous burning zone outward, the energy that can make the generation of coal water slurry fuel atomization air flow is in these two region energy distribution uniform, burning fully, heat exchange efficiency is very remarkable, can be widely used in the multiple type of furnace, satisfy the requirement of multistage power load, and can be complementary with various production status.
The part carbon granule forward in the process of flowing, progressively is deposited to lower furnace portion and burns away with the stratiform form in burner hearth in the water-coal-slurry atomization air flow.
A kind of combustion apparatus that is used for cool water mixture burning of the present invention, comprise burner hearth and water-coal-slurry spray combustion combustor, burner hearth inner combustion chamber, furnace flame outlet, spray on the burner hearth of end the total adjusting air-valve and a plurality of air door that main air duct are arranged, regulate air quantity at coal water slurry fuel.
The present invention can be divided into the combustion chamber upper and lower two parts, top is the suspension combustion chamber, the bottom is the grate firing combustion chamber, water-coal-slurry spray combustion combustor is in the termination of suspension combustion chamber, the grate firing combustion chamber is built-in with fire grate, the grate firing combustion air wind storehouse of a plurality of band wind doors in the fire grate ambient is arranged in the burner hearth, and burner hearth bottom has the branch air channel.
The fire grate of described grate firing combustion chamber is chain row, and surperficial the applying of chain row is stamped radiation resistance thermosphere or coal fuel bed, upper strata chain row's the traffic direction and the contrary that flows to of the main atomized water coal slurry that fires.By chain row's motion, the water-coal-slurry of the progressively deposition on the chain row burns away with the stratiform form on chain row.Wherein, the combustion air of layer combustion chamber is to be disperseed to form again after the air door adjusting in a plurality of wind storehouse enters a plurality of wind storehouse through minute air channel by main air duct.
In the combustion apparatus of the present invention, poly-warm fireclay insulating refractory is arranged on the inboard wall of burner hearth, burner hearth pushes up downward-sloping 7-15 ° angle, the nozzle of water-coal-slurry spray combustion combustor and the downward-sloping 7-15 of line ° of furnace flame export center point, and the furnace flame outlet is externally connected with heat-exchanger rig.Flame export on the burner hearth tail end can be communicated with heat-exchanger rig.The various heat transmission equipments that heat-exchanger rig can adopt multiple rotary kiln, industrial furnace and need enter flame or hot-air from port.
Preferably, combustion apparatus of the present invention also can include the deduster that is connected with heat-exchanger rig, be used at the trap setting of catching high-temperature flue gas uncombusted carbon granule, this trap setting comprises conveying worm and circulation hopper, conveying worm one terminates at the dust-exhausting port place of deduster bottom, the conveying worm other end is connected on the feeding mouth place of circulation hopper, the uncombusted carbon granule that conveying worm is caught deduster returns stove by the circulation hopper and is used for the trap setting that deduster is caught high-temperature flue gas uncombusted carbon granule, and the uncombusted carbon granule that this trap setting is caught deduster by conveying worm and circulation hopper returns stove and delivers on the chain row and heavily burn.Deduster captures like this does not burn carbon granule and can arrange the cocycle burning at chain.
Also can there be the lime-ash passage the terminal below of chain row in the burner hearth, the lime-ash machine of oriented extraneous ash-slag delivery in the lime-ash passage.Like this, lime-ash just can transport out from burner hearth automatically, and combustion apparatus does not need artificial scarfing cinder, deashing, has saved manpower.
In addition, run off, poly-warm fireclay insulating refractory can be arranged on inboard wall of burner hearth in order to prevent energy.Preferred high, medium and low temperature refractory brick of this refractory material or alumina silicate fireclay insulating refractory.
Removable upper and lower two parts, formation suspension combustion chamber, top, the formation grate firing combustion chamber, bottom of being divided into of burner hearth.
Combustion method of the present invention adopts the combustion air aerodynamic field to stablize the special torch formula continuous burning of burner hearth inner suspension combustion zone, can guarantee carrying out continuously of overall mixed combustion for a long time, has improved the burnout rate of coal water slurry fuel.
Combustion method of the present invention can make thick, the thin coal water slurry fuel completing combustion of all kinds of coals, thereby realize efficiency utilization to a greater extent, energy-conservation highly significant.
Adopt combustion method of the present invention, coal water slurry fuel is in abundant burning, lime-ash all the time from the best combustion operating mode of consolidating sulphur, low NOx generation, reaches not only burning fully, and the dual purpose of discharging environmental protection.
The removable two parts up and down that are divided into of the burner hearth of apparatus of the present invention, last dress part main combustion volatile matter and trickle coal particle, sedimentation coal particle that the main combustion of following dress part is relatively large and deduster seizure are returned stove and are heavily burnt coal particle, this up and down split version of burner hearth makes combustion apparatus of the present invention also possess the advantage that convenient transportation is moved in dismounting.
In addition, combustion apparatus of the present invention need not adopt artificial scarfing cinder, deashing, high pressure slurry supply pump, and fuel mixed combustion capable of circulation is complete, especially is convenient to control automatically and use thick, the thin water-coal-slurry of all coals.Particularly, also can directly use diffusing coal by behind the parts that disassemble equipment component.
Combustion apparatus of the present invention is simple in structure, make easily, its manufactured materials wide material sources, production cost is low, operation, convenience easy to maintenance, reliable, be widely used in industries such as oil field, oil refining, chemical industry, light industry, hotel, restaurant, road are built, pottery, heating, papermaking, glass, metallurgy, power station, to existing hot-blast stove, boiler, industrial furnace and direct-fired central air-conditioning and multiple heat-exchanger rig, slightly the mode of coal water slurry fuel displacement fuel oil, gas is transformed, and can reduce the operating cost of fuel greatly.
Description of drawings
Fig. 1 is the structural front view of cool water mixture burning equipment of the present invention
Fig. 2 is the A-A cutaway view of Fig. 1
Fig. 3 is the B-B cutaway view of Fig. 1
Fig. 4 is the front view in whole wind storehouse 43 among Fig. 1
Fig. 5 is the vertical view of Fig. 4
Among the figure: 1 one A deceleration units, 2 one B deceleration units, the 3 one cloth mouths 4 one grey deslagging control stick 5 one circulation hoppers that fall; The 6 one grey slag extractor 7 one A conveying worms that fall; 8 one cloth backplates; Suspension combustion chambers 9 one; 10 1 flame exports; 11 1 first wind storehouses; 12 1 stratiform fuel, 13 12 wind storehouses; 14 1 last wind storehouses, 15 1 chains row; 16 1 chains row deceleration unit, 17 1 water-coal-slurry spray combustion combustor, 18 1 air registers, 19 1 lime-ash overflow downcomers, 20 1 B conveying worms, 21 1 vertical governor motion 22 1 chains drive 23 1 lime-ash passages; 24 1 rail formula movable bases; 25 1 fens air channels; 26 1 platform-type main air ducts; 27 1 hanging ladders; 28 1 total air-valves of regulating; 29 1 flexible ducts; 30 1 tertiary air doors, 31 1 secondary air registers; 32 1 air door 33 1 burner hearths 34 1 poly-warm fireclay insulating refractories; 35 1 suspension combustions return flame district 36 1 ignition machines; The first wind of 37-storehouse air door; 38-two wind storehouse air doors; Wind storehouse, 39-end air door; 40--sees vent; 41-maintenance channel door; The 42-fixed support; The whole wind of 43-storehouse.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail.
Present embodiment is non-limiting embodiment of the present invention.
As shown in Figure 1, 2, 3, apparatus of the present invention mainly comprise the deduster (not shown) on burner hearth 33, water-coal-slurry spray combustion combustor 17, ignition machine 36 and the flue.In the burner hearth 33 is the combustion chamber, the fuel of burner hearth 33 sprays into three air doors that end has by the platform-type main air duct 26 of air blast (not shown) air feed, always regulates air-valve 28, flexible duct 29, air register 18, branch air channel 25 and be communicated with flexible duct 29, i.e. main air intake 32, secondary air register 31, tertiary air door 30.
Platform-type main air duct 26 and is in the below of flexible duct 29,29 belows that are positioned at air register 18 of flexible duct above the branch air channel 25 of the front end of burner hearth 33.Platform-type main air duct 26 is the main air duct of suspension combustion air, the workbench of standing when it also is personnel operation and Maintenance and Repair simultaneously, its effect has two: one, is used to shunt air (suspension combustion air) and gives the combustion-supporting total adjusting air-valve 28 that suspends, after the suspension combustion air is regulated by total adjusting air-valve 28, be delivered to main air intake 32 respectively by flexible duct 29, secondary air register 31, tertiary air door 30, regulate the back that enters air register 18 to the oxygen supply of burning of the elementary volatile matter of the water-coal-slurry of suspension combustion and trickle coal particle through above-mentioned air door again, just form a suspension combustion air aerodynamic field this moment in the combustion chamber, form special smoke backflow at last; The 2nd, be used to shunt air (grate firing combustion air) and give branch air channel 25, the grate firing combustion air is disperseed the carbon granule burning oxygen supply of the water-coal-slurry larger particles of sedimentation on chain row 15 after a plurality of wind doors enter a plurality of wind storehouse by minute air channel 25.
The combustion chamber is divided into the suspension combustion chamber 9 on top and the grate firing combustion chamber of bottom.In the present embodiment, the removable in view of the above two parts up and down that are divided into of burner hearth 33.As shown in Figure 1, there are sight vent 40 and maintenance personal to enter the maintenance channel door 41 of burner hearth on burner hearth 33 sidewalls.Be useful on the refractory material 34 of insulation on the inwall of burner hearth 33, in the present embodiment, refractory material 34 adopts high, medium and low temperature refractory brick.The hanging ladder 27 that one side of burner hearth 33 has manually-operated to use, burner hearth 33 bottoms are useful on vertical governor motion 21,24 of regulating burner hearth 33 height.
The nozzle of water-coal-slurry spray combustion combustor 17 is positioned at the termination of suspension combustion chamber 9, chain row 15 is arranged in the grate firing combustion chamber, chain is arranged 15 surfaces and is applied the thermal insulation layer 12 be stamped the radiation thermal resistance serviceability temperature (existing fire grate serviceability temperature is generally 670 degree-700 degree) when keeping chain row 15 operations in advance, and to adopt thickness be the above coal fuel bed of 200mm to thermal insulation layer 12 in the present embodiment.The chain that chain row 15 sprocket wheel is provided with drive chain row 15 motions drives 22, and chain row 15 drives 22 by chain and supports, and chain drives 22 and is supported on the support 42, and deceleration unit 16 is used to regulate chain row 15 speed.Wherein, the contrary that flows to of upper strata chain traffic direction of arranging and the atomized water coal slurry of leading combustion.
Be used to provide the whole wind storehouse 43 of grate firing combustion air near the grate firing combustion chamber in burner hearth 33, whole wind storehouse 43 chain row 15 around the space in, its both sides are also by support 42 support fixation.
Can find out clearly that from Fig. 1 or Fig. 4 first wind storehouse air door 37, two wind storehouse air doors 38, air door 39 sizes in wind storehouse do not increase successively, this is because the closer to the ejection end of water-coal-slurry slurry, the amount of needed combustion air is big more, helps burning.
Head end and terminal termination chain row 15 are respectively equipped with A conveying worm 7 and B conveying worm 20, the transporting velocity that has B deceleration unit 2 to regulate A conveying worm 7, and A deceleration unit 1 is set the transporting velocity of B conveying worm 20.Wherein A conveying worm 7 is communicated with circulation hopper 5, and the top that chain is arranged 15 head ends is useful on the cloth backplate 8 of guiding.The uncombusted carbon granule that 5 pairs of dedusters of circulation hopper capture plays a cushioning effect when supplying with A conveying worm 7, also play the sealing function between the burner hearth 33 and the external world simultaneously.There is lime-ash passage 23 terminal below of the chain row 5, the lime-ash overflow downcomer 19 and the lime-ash machine 6 of oriented extraneous ash-slag delivery in the lime-ash passage 23, and lime-ash machine 6 includes the grey deslagging control stick 4 that falls that lime-ash is effluxed automatically.
The flame export 10 that has on burner hearth 33 tail ends is communicated with burner hearth 33 heat-exchanger rig (not shown) outward.The various heat transmission equipments that heat-exchanger rig can adopt multiple rotary kiln, industrial furnace and need enter flame or hot-air from port.Heat-exchanger rig is connected with deduster on the flue.
Workflow of the present invention is as follows:
Coal water slurry fuel, atomizing compressed air are delivered to stokehold water-coal-slurry spray combustion combustor 17 by a feeder (not shown) respectively, the stokehold that combustion air is delivered to the first via respectively by a feeder (not shown) total air-valve 28, platform-type main air duct 27, flexible duct 29, air register 18, main air intake 32, secondary air register 31, tertiary air door 30 and the second tunnel branch air channel, stokehold 25, first wind storehouse air door 37, two wind storehouse air doors 38, wind storehouse air door 39 not regulated that suspend, light oil is delivered to stokehold ignition machine 36 by a feeder (not shown).
Just furnace igniting can adopt black furnace to start or the startup of hot stove.
Black furnace starts: at first the starting ignition combustor 36, the pulverized fuel bundle of ignition machine 36 ejections is (not shown in the figures by the one-level ignition means, igniting when so-called one-level igniting is meant the black furnace starting, be to use the dynamo exploder ignition trigger, and two-stage ignition is hot stove startup, be to start with the stratiform fuel ignition on the chain row) light, 9 produce the combustion high temperature torch in the suspension combustion chamber, the heat energy that produced of burning by hyperthermia radiation and to streamed to suspension combustion chamber 9, poly-warm fireclay insulating refractory 34, arch in the stove, heat exchange is carried out on stratiform fuel 12 top layers on the chain row 15, after the temperature of suspension combustion chamber 9 reaches the theoretical burning-point of coal water slurry fuel, by air register 18, the combustion-supporting total adjusting air-valve 28 that suspends is regulated atomizing air and water-coal-slurry proportional quantity, carry out refinement by 17 pairs of coal water slurry fuels of water-coal-slurry spray combustion combustor, the coal water slurry fuel igniting is 9 burnings in the suspension combustion chamber, by regulating suspend combustion-supporting total adjusting air-valve 28 and adjusting main air intake 32, secondary air register 31, the cross section value of tertiary air door 30 can change each time wind flow, regulate each time wind flow by the combustion-supporting total adjusting air-valve 28 that suspends again and can revise combustion powered, by adopting above-mentioned two blowing systems can adjust a combustion air aerodynamic field, can drag back the high-temperature flue gas that an amount of combustion flame progressively forms and form suspension combustion and go back to flame district 35 in process of flowing forward, to satisfy the required thermal capacitance requirement of coal water slurry fuel suspension combustion, 28 pairs of these combustion air aerodynamic fields of combustion-supporting total adjusting air-valve are further revised by suspending, because burner hearth pushes up downward-sloping 7-15 ° angle, the nozzle of water-coal-slurry spray combustion combustor and the downward-sloping 7-15 of line ° of furnace flame export center point, the moving upward in the furnace flame exit owing to hot flame, also can make a part of high-temperature flue gas be raised to burner hearth tail top and form suspension combustion and go back to flame district 35, after coal water slurry fuel can independently stably carry out the burning of torch formula, close ignition machine 36, to keep the smooth combustion in suspension combustion zone.Also can adopt the mode of heating of combustion of wood to carry out furnace igniting just, when the idle cinder of combustion of wood, coal water slurry fuel can carry out smooth combustion.
Hot stove starts: this sparking mode can directly be carried out hot stove grate firing and be strengthened the formula ignition in 24 hours, promptly start the pressure fan (not shown), as Fig. 1,4, shown in 5, combustion air is by dividing air channel 25, through first wind storehouse air door 37, two wind storehouse air doors 38, wind storehouse, end air door 39 is regulated, through first wind storehouse 11, two wind storehouses 13, wind storehouse, end 14, chain row 15 enters thermal insulation layer 12, accelerate the reaction speed of burning behind the thermal insulation layer 12 acquisition combustion airs, cause suspension combustion chamber 9 thermal capacitance ratios to rise, after 9 environment temperatures rising in suspension combustion chamber reaches the theoretical burning-point of coal water slurry fuel, by air register 18 control and regulation atomizing air and water-coal-slurry proportional quantities, can directly enter the link of catching fire promptly in 9 combustion reactions of suspension combustion chamber.
Next coal water slurry fuel carries out mixed combustion in the combustion chamber.
The mixed combustion of circulation suspension settlement moves startup continuously: water-coal-slurry begins to take fire in the combustion chamber, under the suspension combustion air aerodynamic field effect that forms, about 5-10% of elementary volatile matter and trickle coal grain in the 9 main metabolic water coal slurry fuel atomization air flows of suspension combustion chamber.
And a large amount of volatile matters and the part coal grain heat exchange zone internal combustion that 10 ejections enter into heat-exchanger rig through flame export is carried out efficient heat exchange in the coal water slurry fuel atomization air flow; and suitably to reduce burner hearth 33 internal upper part branches be that (heat capacity ratio is meant the heat ratio of burner hearth internal volume for the heat capacity ratio of suspension combustion chamber 9; reduce heat capacity ratio and also promptly reduce ignition temperature; slagging scorification in the time of can preventing cool water mixture burning; effectively reduce the generation of nitrogen oxide, thereby protected atmospheric environment) and form burner hearth 33 continuous burning zone outward.
Part coal grain in the coal water slurry fuel atomization air flow, in burner hearth 33 forward in the process of flowing, because of settlement action from gravity, be deposited on the chain row 15 of bottom in the burner hearth, because chain is arranged the stratiform fuel 12 that burning is arranged at 15 tops, by regulating first wind storehouse air door 37, two wind storehouse air doors 38, last wind storehouse air door 39, first wind storehouse 11, two wind storehouses 13, an amount of combustion air of last wind storehouse 14 supplies, these deposit the coal grain that gets off and proceed burning, make the bottom, combustion chamber form the grate firing combustion chamber.
Flue gas after the process heat exchange is before discharging from chimney by flue, be introduced into deduster and carry out last dedusting, and the contained coal grain that does not burn is caught by the trap setting in the deduster in the flue gas, the coal particle that captures is admitted to circulation hopper 5 by A conveying worm 7, by 7 pairs of this coal particle compressions of A conveying worm, lifting, be distributed in chain through cloth backplate 8 and arrange 15 head ends, chain row 15 drives at chain under 22 the effect, its upper surface is to 23 motions of lime-ash passage, in this motion process for the sedimentation of rough coal grain with return the abundant burning that stove heavily burns the coal grain required time is provided, sedimentation fuel on the chain row 15 and return the heavy fuel burning of stove and move when arriving chain and driving 22 tops with chain row 15, fired idle most, the interior lower part of burner hearth forms the burning of sedimentation for the first time and returns stove and heavily burn the combustion zone like this, thereby suspension combustion first time zone, formation burner hearth 33 tops and burner hearth 33 outer continuous burning zones and the sedimentation for the first time of burner hearth 33 bottoms are burnt and are returned stove and heavily burn the suspension settlement circulation mixed combustion zone that the combustion zone combines, make the energy of coal water slurry fuel atomization air flow, return stove in the sedimentation of stove inner suspension and heavily burn the more evenly burn release and burn complete of mixed combustion zone and the outer continuous burning area distribution of burner hearth 33.Chain row 15 continuation campaign makes lime-ash fall into lime-ash passage 23, and by 20 pairs of this lime-ash compressions of B conveying worm, lifting, lime-ash overflows burner hearth 33 outer can effluxing automatically through lime-ash overflow downcomer 19.Chain is arranged the lime-ash that falls into furnace bottom in 15 motion processes, by the grey deslagging control stick 4 that falls, handles lime-ash machine 6 and dumps lime-ash automatically and can efflux outside burner hearth 33, thereby guarantee the long-term operation continuously of this combustion apparatus.
Among the present invention,, just can directly effectively regulate 30% of total load by the adjusting of air register 18, the 28 pairs of suspension combustion combustion-supporting air quantities of combustion-supporting total adjusting air-valve that suspend.By the adjusting of first wind storehouse air door 37, two wind storehouse air doors 38, last wind storehouse air door 39, first wind storehouse 11, two wind storehouses 13, the 14 pairs of sedimentation grate firing burnings in last wind storehouse combustion-supporting air quantity, just can directly effectively regulate 60% of total load.When the needs ultra-low load moves, regulate coal water slurry fuel atomizing air parameter to certain value, thereby increase the assembly diameter of atomizing slurry grain, reduce the surface area of fuel, promptly suspension combustion chamber 9 is transformed to the slurry drying chamber, a large amount of slurry grains is evaporated behind the moisture dry, and fall to the surface that fuel falls in layer on the chain row rapidly, by regulating first wind storehouse air door 37, two wind storehouse air doors 38, last wind storehouse air door 39, first wind storehouse 11, two wind storehouses 13, the combustion-supporting an amount of air of last wind storehouse 14 supplies, this moment, specified minimum load can be 10% of total load.
Adopt the similar ultra-low load method of operation, also can prolong the cold stoking time, assemble when slurry grain and to fall to layer and fall fuel surface when reaching certain thickness, close water-coal-slurry atomizer 17, air register 18, combustion-supporting total adjusting air-valve 28 suspends, first wind storehouse air door 37, two wind storehouse air doors 38, wind storehouse, end air door 39, chain drives 22 electrical source of power (not shown), the electrical source of power (not shown) of B deceleration unit 2, the electrical source of power (not shown) of A deceleration unit 1, and close coal water slurry fuel, atomizing compressed air, combustion air, the light oil feed, the line related (not shown) of dust arrester etc. can make the cold stoking time the longlyest can reach 30 hours at every turn.The multistage regulating measure of this operating load is widely used in for a long time the needs of operation and complex gap operating condition continuously.
When needs make combustion apparatus out of service, time out of service if desired is when surpassing more than 30 hours, at first closing closed chain drives 22 electrical source of power (not shown) and then closes air register 18 and water-coal-slurry atomizer 17, close suspend combustion-supporting total adjusting air-valve 28, pressure fan (not shown) and first wind storehouse air door 37, two wind storehouse air doors 38, last wind storehouse air door 39 behind the certain hour again, close the electrical source of power (not shown) of B deceleration unit 2, the electrical source of power (not shown) of A deceleration unit 1 then, this moment, combustion apparatus quit work.If need the long period to quit work, also should close the line related (not shown) of coal water slurry fuel, atomizing compressed air, combustion air, light oil feed, dust arrester etc.
Claims (10)
1. the combustion method of a water-coal-slurry, it is characterized in that and to spray into the combustion chamber suspension combustion through the water-coal-slurry of atomizing, combustion flame is progressively forming high-temperature flue gas in the process of flowing forward, make combustion air in burner hearth, form suspension combustion air aerodynamic field, and an amount of high temperature gases recirculating is burnt away in the suspension combustion chamber, flue gas is discharged by chimney after heat exchange.
2. the combustion method of water-coal-slurry according to claim 1 is characterized in that described suspension combustion air aerodynamic field is to enter the combustion air of combustion chamber after coarse adjustment, regulates through air register, regulates through air door repeatedly and mixes that the back forms.
3. the combustion method of water-coal-slurry according to claim 2, it is characterized in that water-coal-slurry and combustion air flow to the furnace flame outlet with the angle with 7-15 ° of horizontal line inclination, the heat-exchanger rig that a large amount of volatile matters and part carbon granule enter outside the burner hearth after furnace flame outlet ejection in the water-coal-slurry atomization air flow burns away.
4. the combustion method of water-coal-slurry according to claim 1 is characterized in that in the water-coal-slurry atomization air flow that the part carbon granule forward in the process of flowing, progressively is deposited to lower furnace portion and burns away with the stratiform form in burner hearth.
5. combustion apparatus that is used for cool water mixture burning, comprise burner hearth and water-coal-slurry spray combustion combustor, burner hearth inner combustion chamber, furnace flame outlet, it is characterized in that the total adjusting air-valve and a plurality of air door that on coal water slurry fuel sprays into the burner hearth of end, main air duct are arranged, regulate air quantity.
6. the combustion apparatus of cool water mixture burning according to claim 5, it is characterized in that the combustion chamber is divided into upper and lower two parts, top is the suspension combustion chamber, the bottom is the grate firing combustion chamber, water-coal-slurry spray combustion combustor is in the termination of suspension combustion chamber, the grate firing combustion chamber is built-in with fire grate, and the grate firing combustion air wind storehouse of a plurality of band wind doors in the fire grate ambient is arranged in the burner hearth, and burner hearth bottom has the branch air channel.
7. the combustion apparatus of cool water mixture burning according to claim 6, the fire grate that it is characterized in that described grate firing combustion chamber is chain row, surperficial the applying of chain row is stamped radiation resistance thermosphere or coal fuel bed, upper strata chain row's the traffic direction and the contrary that flows to of the main atomized water coal slurry that fires.
8. according to the combustion apparatus of one of claim 5-7 described cool water mixture burning, it is characterized in that having on the inboard wall of burner hearth poly-warm fireclay insulating refractory, burner hearth pushes up downward-sloping 7-15 ° angle, the nozzle of water-coal-slurry spray combustion combustor and the downward-sloping 7-15 of line ° of furnace flame export center point, the furnace flame outlet is externally connected with heat-exchanger rig.
9. the combustion apparatus of cool water mixture burning according to claim 8, it is characterized in that this equipment also includes the deduster that is connected with heat-exchanger rig, be used at the trap setting of catching high-temperature flue gas uncombusted carbon granule, this trap setting comprises conveying worm and circulation hopper, conveying worm one terminates at the dust-exhausting port place of deduster bottom, the conveying worm other end is connected on the feeding mouth place of circulation hopper, the uncombusted carbon granule that conveying worm is caught deduster returns stove by the circulation hopper and delivers on the chain row, the terminal below of described chain row also has the lime-ash passage, the lime-ash machine of oriented extraneous ash-slag delivery in the lime-ash passage in the burner hearth.
10. according to the combustion apparatus of one of claim 5-7 described cool water mixture burning, it is characterized in that removable upper and lower two parts, formation suspension combustion chamber, top, the formation grate firing combustion chamber, bottom of being divided into of burner hearth.
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| CN 200610078892 CN101070956A (en) | 2006-05-12 | 2006-05-12 | Coal-water slurry combustion method and its combustion equipment |
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| CN 200610078892 CN101070956A (en) | 2006-05-12 | 2006-05-12 | Coal-water slurry combustion method and its combustion equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563616A (en) * | 2011-01-04 | 2012-07-11 | 董彦东 | Combustion method for boiler |
| CN101639225B (en) * | 2009-09-04 | 2012-10-03 | 株洲市蓝宇热能科技研制有限公司 | Biomass water-coal-slurry slurring and combustion method and integrated system |
| CN103267276A (en) * | 2013-05-31 | 2013-08-28 | 冀州市华昌机械厂 | Coalification deep processing heating equipment |
| CN104929768A (en) * | 2014-05-19 | 2015-09-23 | 陕西矩阵动力科技有限公司 | Coal water slurry compression ignition engine |
| CN116906885A (en) * | 2023-09-14 | 2023-10-20 | 北京国能国源能源科技有限公司 | Combustion equipment and combustion method for flameless combustion |
-
2006
- 2006-05-12 CN CN 200610078892 patent/CN101070956A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101639225B (en) * | 2009-09-04 | 2012-10-03 | 株洲市蓝宇热能科技研制有限公司 | Biomass water-coal-slurry slurring and combustion method and integrated system |
| CN102563616A (en) * | 2011-01-04 | 2012-07-11 | 董彦东 | Combustion method for boiler |
| CN103267276A (en) * | 2013-05-31 | 2013-08-28 | 冀州市华昌机械厂 | Coalification deep processing heating equipment |
| CN103267276B (en) * | 2013-05-31 | 2017-05-24 | 河北齐工环保科技有限公司 | Coalification deep processing heating equipment |
| CN104929768A (en) * | 2014-05-19 | 2015-09-23 | 陕西矩阵动力科技有限公司 | Coal water slurry compression ignition engine |
| CN116906885A (en) * | 2023-09-14 | 2023-10-20 | 北京国能国源能源科技有限公司 | Combustion equipment and combustion method for flameless combustion |
| CN116906885B (en) * | 2023-09-14 | 2024-04-02 | 北京国能国源能源科技有限公司 | Combustion equipment and combustion method for flameless combustion |
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