CN205504972U - Buggy decoupling zero combustor of reinforcing reposition of redundant personnel densification - Google Patents
Buggy decoupling zero combustor of reinforcing reposition of redundant personnel densification Download PDFInfo
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- CN205504972U CN205504972U CN201620159754.6U CN201620159754U CN205504972U CN 205504972 U CN205504972 U CN 205504972U CN 201620159754 U CN201620159754 U CN 201620159754U CN 205504972 U CN205504972 U CN 205504972U
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Abstract
The utility model discloses a buggy decoupling zero combustor of reinforcing reposition of redundant personnel densification, the combustor includes spout, deep or light reposition of redundant personnel baffle, first part powder flame stabilizer, next part powder flame stabilizer and middle part collection powder flame stabilizer. The utility model discloses a set up middle part collection powder flame stabilizer, can be under the condition of same air current steric compression speed, reduce each album powder flame stabilizer's collection powder inclined plane inclination to reduce collection powder flame stabilizer's wearing and tearing, improve equipment life also is favorable to lightening buggy segregation and the coking that the combustor exported, has improved the effect of decoupling zero burning.
Description
Technical field
This utility model relates to coal-dust combustion device field, is specifically related to a kind of pulverized coal decoupling combustor strengthening shunting enrichment.
Background technology
In process of coal combustion, high-temperature oxygen-enriched be conducive to improving efficiency of combustion, but the NO generated in combustion process can be increased simultaneouslyx；Otherwise, hypothermia and hypoxia is conducive to suppressing NOxGeneration, but coal dust is less susceptible to after-flame.Release Combustion Efficiency of Coal Powder and NOxThe coupled problem of discharge is the long-standing technological difficulties in coal dust firing field.
Coal used by Power Plant in China, the coal of colm or low volatile occupies the biggest proportion, during using such coal, there is the problems such as combustion instability, breeze airflow ignition lag and efficiency of combustion are low in a large number, safety and economy to unit operation bring the biggest challenge.Such coal is reducing NOxThe coupling emission problem faced during discharge is even more serious.
Pre-stage test and engineer applied are it was demonstrated that Burning Technique by Dispelling Coupling can realize releasing fly ash combustible material and the NO of coal burningxCoupling discharge relation, be to reduce fly ash combustible material and NO simultaneouslyxThe effective ways of discharge.Coal burning process is divided into two stages, first stage by this technology, and coal issues heat solution in the highest reducing atmosphere, gasifies and burn, and makes full use of the pyrolysis of coal self and gasification product by fuel type NOxIt is converted into more stable N2；Second stage is created high-temperature oxygen-enriched but is not produced thermal NOxEnvironment, then guarantee the abundant after-flame of coal.Produce the conversion process of fugitive constituent nitrogen at burning initial stage pyrolytic gasification, be that decoupling burning suppresses NOxDischarge critical process, this process mainly inside First air, secondary wind mixing before less spatial dimension carry out, this process is belonging to the fractional combustion on microcosmic, can make full use of reactivity higher pyrolytic gasification product as reducing agent.
At present, multiple decoupling burning device is had been developed for according to decoupling burning principle and high temperature gases recirculating stable combustion technology.Patent application " pulverized coal decoupling combustor of a kind of thick side staged and combustion method " (number of patent application: 201120569682.X) discloses a kind of pulverized coal decoupling combustor and coal dust decoupling burning method, Pulverized Coal Concentration is integrated in one by this burner with steady combustion function, it is possible not only to improve the effect of decoupling burning, structure is the most relatively simple, can dock with any one Pulverized Coal Concentration device, motility is higher, strengthens the adaptability using Coal rank.But although this burner makes wind powder obtain high separation, obtain super thick coal culm air-flow and time dense air-flow two parts, but local, breeze airflow only both sides, dense side has carried out wind powder to be separated, isolated wind is the most also concentrated and is imported in the secondary dense air-flow at middle part, the coal powder density making time dense air-flow relatively separates front reduction, reduces suppression NOxThe efficiency generated；Secondly, super thick coal culm air-flow and time dense air-flow two parts are closely coupled, mix faster in flowing, necessarily reduce air-coal separating suppression NOxThe effect generated.Especially for meager coal and anthracite, volatile matter concentration is relatively low, separates out relatively slow, and it is extremely to be unfavorable for suppressing NO that the reducing atmosphere time shortensxGenerate.
Patent application " a kind of pulverized coal decoupling combustor shunting enrichment and combustion method " (Authorization Notice No.: CN103062763B) discloses a kind of pulverized coal decoupling combustor shunting enrichment, see Fig. 1, it combines Pulverized Coal Concentration, decoupling burning and surely fires function, relatively " a kind of pulverized coal decoupling combustor and coal dust decoupling burning method ", the design of deversoir blocks dense side coal dust and moves to light powder effluent with air-flow, has postponed light powder air-flow and the mixing of dense powder air-flow.In order to increase the collection powder flame holder extruding to air-flow, producing higher ultra concentration effect, the inclination angle, collection powder flame holder collection powder face of this burner is relatively big, but, collect the excessive inclination angle of powder flame holder and necessarily cause collection powder surface wear to accelerate, reduce the service life of burner.It addition, the dense powder sidewind of this burner is turned to light powder lateral deviation continuously by collection powder flame holder extruding, cause the dense lateral deviation of burner outlet to turn air-flow and part coal dust is brought into light powder side, thus reduce the Pulverized Coal Concentration effect of breeze airflow, affect the usefulness of decoupling burning.
Utility model content
The purpose of this utility model is to provide a kind of pulverized coal decoupling combustor strengthening shunting enrichment, this burner is by setting up middle part collection powder flame holder, the inclination angle, collection powder face of collection powder flame holder can be reduced, increase the volume energy-absorbing power of super dense air-flow, thus increase service life of equipment and improve decoupling burning performance.It addition, by dense powder side diaphragm and deversoir the guide functions before spout outlet, reduce the deflection to light powder side after spout outlet of dense sidewind.
A kind of pulverized coal decoupling combustor strengthening shunting enrichment that this utility model provides to achieve these goals, described burner includes spout, deep or light split-flow baffles, upper collection powder flame holder, next part powder flame holder and middle part collection powder flame holder；
Described deep or light split-flow baffles is arranged at the middle part of spout, and the shell body of the two ends up and down of deep or light split-flow baffles and spout connects；Spout is separated for through-flow light sidewind and two gas channels of dense sidewind respectively by deep or light split-flow baffles；
Described upper collection powder flame holder, next part powder flame holder and middle part collection powder flame holder are positioned at the passage side of logical dense sidewind；Described upper collection powder flame holder, next part powder flame holder and middle part collection powder flame holder entirety cross section are flat taper, and along airflow direction, front elevational sectional is little, and rear end section is big；The cross section that described upper collection powder flame holder, next part powder flame holder are vertical with airflow direction with middle part collection powder flame holder is by the diminishing step structure of the lateral surface of orifice rim to center；
The lateral surface of described upper collection powder flame holder, next part powder flame holder and middle part collection powder flame holder is connected with spout, upper collection powder flame holder, next part powder flame holder the stepped side of medial surface relative, be provided with through-flow space between relative medial surface；Described middle part collection powder flame holder is arranged on the through-flow space between collection powder flame holder, next part powder flame holder, the upper and lower stepped prism of middle part collection powder flame holder is relative with the stepped side of medial surface of upper collection powder flame holder, next part powder flame holder respectively, is respectively equipped with through-flow space between middle part collection powder flame holder and upper collection powder flame holder, next part powder flame holder；
Described upper collection powder flame holder, next part powder flame holder are designed with deversoir with each cascaded surface of the relative side of middle part collection powder flame holder near deep or light split-flow baffles side；Described deversoir is cascaded surface and the strip structure of corresponding inclined-plane bending collecting powder flame holder along airflow direction compared with personal attendant；One sidewall of described deversoir is close to be connected to the cascaded surface of collection powder flame holder and corresponding inclined-plane along its length；Described each deversoir stops the cascaded surface and the coal dust on corresponding inclined-plane being close to collect powder flame holder, and makes it with air flow direction deep or light split-flow baffles side.
As improvement, it is to increase direction lopsidedness along airflow direction to the cross section of collection powder flame holder that the sidewall of side, direction (away from deep or light split-flow baffles side) is increased in the cross section near collection powder flame holder of described deversoir, side, direction (away from deep or light split-flow baffles side) is increased in the cross section that the air-flow pressing close to collect powder flame holder surface guides collection powder flame holder, collection powder flame holder is laterally summarized at the vertical coal dust collected due to deversoir, and fraction is vertically being pressed to middle part, concentrate further and improve near collection powder flame holder prism and the coal powder density of the breeze airflow of the sidewall side of the inclination of deversoir, make this air-flow concentrate and become the more higher leveled super thick coal culm air-flow of coal powder density；This super ultra-concentrating powder air-flow is positioned at the external angle of flow cross-sectional simultaneously, in addition form smoke backflow after deversoir and increase air-flow border volume suction area, make this air-flow be more easy to volume and inhale more high-temperature hot flue gas, unburnable coal thus for low-volatile, this air-flow can become the stable flame caught fire, and is substantially improved the steady combustion ability of burner；The guide effect of deversoir also can make more coal dust increase with the angle in light powder air current flow direction, has postponed the mixing of the two, is conducive to suppressing the generation of NOx.
Preferably, the deversoir of relative collection powder flame holder is connected in the spout outlet side along airflow direction.This design can reduce the dense survey air-flow port of export in spout and turn to light powder lateral deviation.
Preferably, it is disposed with multiple deversoir to lateral separation on each cascaded surface of the prism of collection powder flame holder and corresponding inclined-plane, deversoir height on the same cascaded surface of the prism of collection powder flame holder is inconsistent, and wherein, the deversoir height near light powder side is the highest.It is disposed with multiple deversoir to lateral separation on each cascaded surface of the prism of collection powder flame holder and corresponding inclined-plane, each deversoir can stop that the coal dust being close to collect the prism of powder flame holder is with air flow direction deep or light split-flow baffles side, making the concentration distribution between each cascaded surface of the dense powder air-flow present the most steps, the concentration in each cascaded surface more uniformly spreads simultaneously.
Preferably, dense powder side diaphragm it is provided with in the gas channel of described dense sidewind；Described upper collection powder flame holder, next part powder flame holder and middle part collection powder flame holder, in spout outlet one end of the side of the close deep or light split-flow baffles of upper collection powder flame holder, next part powder flame holder and middle part collection powder flame holder, are coupled together by described dense powder side diaphragm.
Preferably, described dense powder side diaphragm is tight with the connection of middle part collection powder flame holder；Described dense powder side diaphragm and upper collection powder flame holder, next part powder flame holder only at spout outlet one end compact siro spinning technology, are leaving gap near spout entrance one end.Thus, the top and the bottom of the spout entrance side that the breeze airflow extruded by collection powder flame holder is only capable of anterior and dense powder side, the spout entrance one end diaphragm from dense powder side diaphragm deflect to light powder side；Change the shape of dense powder side diaphragm and to the guiding inclination angle of dense powder side, assignment of traffic and the flow direction of dense survey breeze airflow can be changed.
Preferably, described nozzle shape uses the horn mouth of flaring.Described nozzle shape uses the bell-mouth structure of air of flaring to may utilize air-flow and makes the breeze airflow enrichment between collection powder flame holder to orifice rim diffusion and coal dust inertia, thus can improve collection powder concentrated effect under the inclination angle of less collection powder flame holder and reduce air current flow resistance.
Preferably, described middle part collection powder flame holder and upper and lower collection powder flame holder are compared with the end face near spout outlet side, and the collection powder flame holder end face near spout outlet side in middle part is further from spout outlet side.This design can make the middle part collection powder flame holder volume smoking gas in spout outlet side can stretch in spout, improves warm-up ability.
Preferably, pulverized coal ignition device can pass middle part collection powder flame holder, carries out pulverized coal ignition at the end face near spout outlet side.
As improving further, each collection size dimension of powder flame holder, shape and the rear end cross-sectional sizes along airflow direction can be different, so can collect collection powder concentrated effect and the smoke backflow ability at this pair collection powder flame holder rear portion of the relative side of powder flame holder for a pair with priority support.
As improving further, described deep or light split-flow baffles is for being in tilted layout so that the passage of the dense sidewind that deep or light split-flow baffles and the housing of spout surround is gradually increased along the actual internal area of air flow direction；Light sidewind can be guided by deep or light split-flow baffles, makes light sidewind deviate the flowing of dense sidewind；
As improving further, device of the present utility model can also be with other outside Pulverized Coal Concentration devices docking, thus realize the further concentration to the dense sidewind that outside Pulverized Coal Concentration device produces, obtain the pulverized coal decoupling combustor of dense side enrichment again, outside described, the dense sidewind in Pulverized Coal Concentration device and light sidewind are respectively through described dense side gas flow path and the described light side gas flow path of spout, enter hearth combustion.
This utility model additionally provides a kind of combustion method based on a kind of pulverized coal decoupling combustor strengthening shunting enrichment, said method comprising the steps of:
1), after coal dust enters spout, the collection powder flame holder positioned opposite to each other through upper, middle and lower, owing to collecting the squeezing action on powder flame holder inclined-plane, the concentration of the breeze airflow of craspedodrome improves, and forms thick coal culm air-flow；Deflected to light powder side from the top and the bottom of the close spout entrance side of anterior and dense powder side, the spout entrance one end diaphragm of dense powder side diaphragm by the fraction of collection powder flame holder extruding；
Step 1) in owing to collecting the squeezing action on powder flame holder inclined-plane, middle part flowing in partial air deflection spout, coal dust is due to effect of inertia, and the concentration of the breeze airflow of craspedodrome improves, and forms thick coal culm air-flow.Due to the setting of dense powder side diaphragm, the top and the bottom of the close spout entrance side that the fraction extruded by collection powder flame holder is only capable of anterior and dense powder side, the spout entrance one end diaphragm from dense powder side diaphragm deflect to light powder side.
2) the collection powder flame holder that coal dust sets gradually through upper, middle and lower, in spout, coal powder density and the flow velocity at center is distributed in the staged reduced.
Described step 2) in, the collection powder flame holder that coal dust sets gradually through upper, middle and lower, by extruding of three forge piece of step type structure collecting powder flame holder rear ends, the air-flow that ladder is high is squeezed greatly, the outer sidewind coal powder density being formed close to spout shell body in this passage is higher, flow velocity faster, in spout, coal powder density and the flow velocity at center is distributed in the corresponding staged reduced, the front end of collection powder flame holder makes to form bigger backflow space outside spout, bigger from the heat smoke amount of burner hearth backflow, the intensity that outside thick coal culm air-flow is heated is higher；The setting of middle part collection powder flame holder, makes dense sidewind circumference increase, and volume is inhaled the ability of burner hearth high-temperature flue gas heating and improved further.
Preferably, described step 1) farther include following sub-step:
11), after breeze airflow flows through outside Pulverized Coal Concentration device, it is divided into dense sidewind and light sidewind；Dense sidewind enters the dense side gas flow path of described spout, and the partial air in this dense sidewind is middle part flowing in dense powder side diaphragm, deflection spout, and coal dust improves further due to effect of inertia, the concentration of the thick coal culm air-flow of craspedodrome, forms super thick coal culm air-flow；It is extruded the air-flow distributed to carry part coal dust and form time thick coal culm air-flow.
In above-mentioned steps, dense sidewind enters the dense side gas flow path of described spout, the squeezing action on the inclined-plane collecting powder flame holder owing to being oppositely arranged, partial air in this dense sidewind is through dense powder side diaphragm, middle part flowing in deflection spout, coal dust improves further due to effect of inertia, the concentration of the thick coal culm air-flow of craspedodrome, forms super thick coal culm air-flow；It is extruded the air-flow distributed to carry part coal dust and form time thick coal culm air-flow.
Preferably, described step 2) farther include following sub-step:
21) side, direction is increased in the cross section that the air-flow pressing close to collect powder flame holder surface guides collection powder flame holder by the deversoir 3 of sidewall slope, deversoir laterally summarizes collection powder flame holder at the vertical coal dust collected, and fraction is vertically being pressed against middle part, improving further near collection powder flame holder prism and the coal powder density of the breeze airflow of the sidewall side of the inclination of deversoir, making this air-flow concentrate becomes the more higher leveled super thick coal culm air-flow of coal powder density；This super thick coal culm air-flow becomes the stable flame caught fire simultaneously；The sloped sidewall of deversoir increases the angle at spout outlet Yu light powder air current flow direction, and then postpones the mixing of the two.In this step, the border volume of super thick coal culm air-flow inhales area greatly, and easily volume inhales more high-temperature hot flue gas, becomes the stable flame caught fire.
22) super thick coal culm air-flow and super thick coal culm air-flow heat up rapidly, and fast pyrogenation, gasification occur；After the volatile combustion of super thick coal culm air-flow, in succession with secondary dense air-flow and light powder air-flow progressively mixed combustion.In this step, super thick coal culm air-flow and super thick coal culm air-flow heat up rapidly, there is fast pyrogenation, gasification, volatile matter nitrogen ratio is greatly improved, the oxygen content of super thick coal culm air-flow is extremely low, in volatile matter after coal pyrolytic gasified, reducing substances is many, thus volatile matter nitrogen generates stable N mostly in combustion2；After the volatile combustion of super thick coal culm air-flow, in succession with secondary dense air-flow and light powder air-flow progressively mixed combustion, owing to the coke in thick coal culm burns the most in succession, consumption to oxygen increases, cause light powder air-flow with dense powder air-flow mixing after-combustion still under Hypoxic habitats, simultaneously by the catalysis reduction of coke, thus coke nitrogen is converted into NOxRatio reduce.
Preferably, described method further includes steps of through burner, and dense powder, the volatile matter nitrogen of light powder and coal dust coke nitrogen burning conversion are N2After, supplement secondary wind in time.This step can make coal dust that high-temperature oxygen-enriched reaction occurs, and extends in the burner hearth clean-burning time, thus fully after-flame, reduce fly ash combustible material, the content of CO in flue gas, it is achieved that the decoupling burning of fine coal.
The pulverized coal decoupling combustor of this utility model offer and the outstanding feature of combustion method:
1, by arranging middle part collection powder flame holder, the collection powder inclination angle of inclined plane of each collection powder flame holder in the case of same airflow space compression speed, can be reduced, thus reduce the abrasion of collection powder flame holder, improve service life of equipment；Simultaneously as arrange middle part collection powder flame holder in the middle part of dense sidewind, the circumference area of dense powder air-flow can be greatly increased, thus increase dense powder air-flow volume and inhale the heating efficiency of high-temperature flue gas；It addition, reduce the collection powder inclination angle of inclined plane of collection powder flame holder, it is also beneficial to alleviate the coal dust segregation of burner outlet and coking.
2, dense powder air-flow is concentrated by the shunting again of collection powder flame holder and dense powder side diaphragm, and the more breeze airflow near side, burner hearth center (to fire side) can be made to reach super dense state.Due to the dense powder side diaphragm separation guide functions to dense side thick coal culm stream, dense sidewind can be alleviated in the spout outlet deflection to light powder side；Simultaneously as deep or light split-flow baffles separates guide functions to the dense powder side diaphragm of light powder air-flow, and between light powder stream and dense powder stream, form time dense air-flow, dense powder air-flow and the mixing of light powder air-flow can be postponed, thus improve the effect of decoupling burning；
3, this utility model guides inclination angle and the relative altitude size of deversoir by designing the shape that can change dense powder side diaphragm and air-flow, can change the assignment of traffic of dense survey breeze airflow and control the deflection to light powder side of the super thick coal culm air-flow；
4, this utility model nozzle shape uses flaring horn mouth, utilizes Diffusion of gas stream and coal dust inertia to make the breeze airflow enrichment between collection powder flame holder, is also beneficial to reduce the inclination angle of collection powder flame holder, reduces burner abrasion and flow resistance；
5, burner of the present utility model itself has good Pulverized Coal Concentration and warm-up ability, can be not required to configure external Pulverized Coal Concentration device for bituminous coal and be used alone, for direct-firing system, the high load capacity primary air ratio adverse effect to low nitrogen burning bigger than normal can be improved.Coal-fired for low volatile difficulty, burner of the present utility model can dock with external Pulverized Coal Concentration device, to improve the ability of Pulverized Coal Concentration further, produces super thick coal culm air-flow.
Accompanying drawing explanation
Fig. 1 is the pulverized coal decoupling combustor structure front view of existing shunting enrichment；
Fig. 2 is the structure front view of pulverized coal decoupling combustor of the present utility model；
Fig. 3 is the structure vertical view cutaway drawing of pulverized coal decoupling combustor of the present utility model；
Fig. 4 is that the structure right side of pulverized coal decoupling combustor of the present utility model regards sectional view.
Accompanying drawing identifies
1, spout；2, deep or light split-flow baffles；3, deversoir；4, dense powder side diaphragm；5, upper collection powder flame holder；6, middle part collection powder flame holder；7, light sidewind；8, dense sidewind；9, upper collection powder flame holder.
Detailed description of the invention
The following is embodiment of the present utility model, it is only used as and illustrates rather than restriction to of the present utility model.
A kind of pulverized coal decoupling combustor strengthening shunting enrichment that this utility model provides, described burner includes spout 1, deep or light split-flow baffles 2, upper collection powder flame holder 9, next part powder flame holder and middle part collection powder flame holder 6；
Described deep or light split-flow baffles 2 is arranged at the middle part of spout 1, and the shell body of the two ends up and down of deep or light split-flow baffles 2 and spout 1 connects；Spout 1 is separated for through-flow light sidewind 7 and two gas channels of dense sidewind 8 respectively by deep or light split-flow baffles 2；
Described upper collection powder flame holder 9, next part powder flame holder 5 and middle part collection powder flame holder 6 are positioned at the passage side of logical dense sidewind 8；The overall cross section of described upper collection powder flame holder 9, next part powder flame holder 5 and middle part collection powder flame holder 6 is flat taper, and along airflow direction, front elevational sectional is little, and rear end section is big；The cross section that described upper collection powder flame holder 9, next part powder flame holder 5 are vertical with airflow direction with middle part collection powder flame holder 6 be the lateral surface by spout 1 edge to center diminishing step structure；
The lateral surface of described upper collection powder flame holder 9, next part powder flame holder 5 and middle part collection powder flame holder 6 is connected with spout 1, and the stepped side of medial surface of upper and lower collection powder flame holder 5 is relative, is provided with through-flow space between relative medial surface；Described middle part collection powder flame holder 6 is arranged on the through-flow space between collection powder flame holder 9, next part powder flame holder 5, the upper and lower stepped prism of middle part collection powder flame holder 6 is relative with the stepped side of medial surface of upper collection powder flame holder 9, next part powder flame holder 5 respectively, is respectively equipped with through-flow space between middle part collection powder flame holder 6 and upper collection powder flame holder 9, next part powder flame holder 5；
Each cascaded surface of the relative side of each collection powder flame holder is designed with deversoir 3 near deep or light split-flow baffles 2 side；Described deversoir 3 is strip structure longer along airflow direction, that bend with cascaded surface and the corresponding inclined-plane of collection powder flame holder at airflow direction；One sidewall of described each deversoir 3 is close to be connected to the cascaded surface of collection powder flame holder and corresponding inclined-plane along its length；Described each deversoir 3 can stop to be close to collect the cascaded surface of powder flame holder and the coal dust on corresponding inclined-plane with air flow direction deep or light split-flow baffles 2 side.
As improvement, it is to increase direction lopsidedness along airflow direction to the cross section of collection powder flame holder that the sidewall of side, direction (away from deep or light split-flow baffles 2 side) is increased in the cross section near collection powder flame holder of described deversoir 3, side, direction (away from deep or light split-flow baffles 2 side) is increased in the cross section that the air-flow pressing close to collect powder flame holder surface guides collection powder flame holder, collection powder flame holder is laterally summarized at the vertical coal dust collected due to deversoir 3, and fraction is vertically being pressed to middle part, concentrate further and improve near collection powder flame holder prism and the coal powder density of the breeze airflow of the sidewall side of the inclination of deversoir 3, make this air-flow concentrate and become the more higher leveled super thick coal culm air-flow of coal powder density；This super ultra-concentrating powder air-flow is positioned at the external angle of flow cross-sectional simultaneously, in addition form smoke backflow after deversoir 3 and increase air-flow border volume suction area, make this air-flow be more easy to volume and inhale more high-temperature hot flue gas, unburnable coal thus for low-volatile, this air-flow can become the stable flame caught fire, and is substantially improved the steady combustion ability of burner；The guide effect of deversoir 3 also can make more coal dust increase with the angle in light powder air current flow direction, has postponed the mixing of the two, is conducive to suppressing the generation of NOx；
As improvement, the deversoir 3 of described relative collection powder flame holder is connected in the spout outlet side along airflow direction, turns to light powder lateral deviation reducing the dense survey air-flow port of export in spout；
As improvement, it is disposed with multiple deversoir 3 to lateral separation on each cascaded surface of the prism of collection powder flame holder and corresponding inclined-plane, each deversoir 3 can stop that the coal dust being close to collect the prism of powder flame holder is with air flow direction deep or light split-flow baffles 2 side, making the concentration distribution between each cascaded surface of the dense powder air-flow present the most steps, the concentration in each cascaded surface more uniformly spreads simultaneously；Deversoir 3 on the same cascaded surface of the prism of collection powder flame holder is the most inconsistent, and wherein, the deversoir 3 near light powder side is the highest；
As improvement, in the gas channel of described dense sidewind 8, it is provided with dense powder side diaphragm 4；Described upper and lower collection powder flame holder 5 and middle part collection powder flame holder 6, in upper and lower collection powder flame holder 5 and spout outlet one end of the side of the close deep or light split-flow baffles 2 of middle part collection powder flame holder 6, are coupled together by described dense powder side diaphragm 4；
As improvement, described dense powder side diaphragm 4 is tight with the connection of middle part collection powder flame holder 6；Described dense powder side diaphragm 4 and upper and lower collection powder flame holder 5 only at spout outlet one end compact siro spinning technology, are leaving gap near spout entrance one end；Thus, the top and the bottom of the spout entrance side that the breeze airflow extruded by collection powder flame holder is only capable of anterior and dense powder side, the spout entrance one end diaphragm 4 from dense powder side diaphragm 4 deflect to light powder side；Change the shape of dense powder side diaphragm 4 and to the guiding inclination angle of dense powder side, assignment of traffic and the flow direction of dense survey breeze airflow can be changed；
As improvement, described spout 1 profile uses the horn mouth of flaring, available air-flow makes the breeze airflow enrichment between collection powder flame holder to orifice rim diffusion and coal dust inertia, thus can improve collection powder concentrated effect under the inclination angle of less collection powder flame holder and reduce air current flow resistance；
As improvement, described middle part collection powder flame holder 6 and upper and lower collection powder flame holder 5 are compared with the end face near spout outlet side, the middle part collection powder flame holder 6 end face near spout outlet side is further from spout outlet side, so that the volume smoking gas that middle part collection powder flame holder 6 is in spout outlet side can stretch in spout, improve warm-up ability；
As improving further, pulverized coal ignition device can pass middle part collection powder flame holder 6, carries out pulverized coal ignition at the end face near spout outlet side；
As improving further, each collection size dimension of powder flame holder, shape and the rear end cross-sectional sizes along airflow direction can be different, so can collect collection powder concentrated effect and the smoke backflow ability at this pair collection powder flame holder rear portion of the relative side of powder flame holder for a pair with priority support.
As improving further, described deep or light split-flow baffles 2 is for being in tilted layout so that the passage of the dense sidewind 8 that deep or light split-flow baffles 2 and the housing of spout 1 surround is gradually increased along the actual internal area of air flow direction；Light sidewind 7 can be guided by deep or light split-flow baffles 2, makes light sidewind 7 deviate dense sidewind 8 and flows；
As improving further, device of the present utility model can also be with other outside Pulverized Coal Concentration devices docking, thus realize the further concentration to the dense sidewind that outside Pulverized Coal Concentration device produces, obtain the pulverized coal decoupling combustor of dense side enrichment again, outside described, the dense sidewind in Pulverized Coal Concentration device and light sidewind are respectively through described dense side gas flow path and the described light side gas flow path of spout 1, enter hearth combustion.
This utility model additionally provides a kind of combustion method based on the above-mentioned pulverized coal decoupling combustor strengthening shunting enrichment, said method comprising the steps of:
1), after coal dust enters spout 1, the collection powder flame holder positioned opposite to each other through upper, middle and lower, owing to collecting the squeezing action on powder flame holder inclined-plane, middle part flowing in partial air deflection spout, coal dust improves due to effect of inertia, the concentration of the breeze airflow of craspedodrome, forms thick coal culm air-flow.Due to the setting of dense powder side diaphragm 4, the top and the bottom of the close spout entrance side that the fraction extruded by collection powder flame holder is only capable of anterior and dense powder side, the spout entrance one end diaphragm 4 from dense powder side diaphragm 4 deflect to light powder side.
2) the collection powder flame holder that coal dust sets gradually through upper, middle and lower, by extruding of three forge piece of step type structure collecting powder flame holder rear ends, the air-flow that ladder is high is squeezed greatly, the outer sidewind coal powder density being formed close to spout shell body in this passage is higher, flow velocity faster, in spout, coal powder density and the flow velocity at center is distributed in the corresponding staged reduced, the front end of collection powder flame holder makes to form bigger backflow space outside spout, bigger from the heat smoke amount of burner hearth backflow, the intensity that outside thick coal culm air-flow is heated is higher；The setting of middle part collection powder flame holder, makes dense sidewind circumference increase, and volume is inhaled the ability of burner hearth high-temperature flue gas heating and improved further.
As further preferably, described step 1) and 2) include following sub-step:
11), after breeze airflow flows through outside Pulverized Coal Concentration device, it is divided into dense sidewind and light sidewind；Dense sidewind enters the dense side gas flow path of described spout 1, the squeezing action on the inclined-plane collecting powder flame holder owing to being oppositely arranged, partial air in this dense sidewind is through dense powder side diaphragm, middle part flowing in deflection spout, coal dust is due to effect of inertia, the concentration of the thick coal culm air-flow kept straight on improves further, forms super thick coal culm air-flow；It is extruded the air-flow distributed to carry part coal dust and form time thick coal culm air-flow.
21) side, direction is increased in the cross section that the air-flow pressing close to collect powder flame holder surface guides collection powder flame holder by the deversoir 3 of sidewall slope, deversoir laterally summarizes collection powder flame holder at the vertical coal dust collected, and fraction is vertically being pressed against middle part, concentrating further and improve near collection powder flame holder prism and the coal powder density of the breeze airflow of the sidewall side of the inclination of deversoir, making this air-flow concentrate becomes the more higher leveled super thick coal culm air-flow of coal powder density；The border volume of this super thick coal culm air-flow inhales area greatly simultaneously, and easily volume inhales more high-temperature hot flue gas, becomes the stable flame caught fire；The sloped sidewall of deversoir makes more coal dust turn to dense lateral deviation, increases the angle at spout outlet Yu light powder air current flow direction, and then postpones the mixing of the two；
22) super thick coal culm air-flow and super thick coal culm air-flow heat up rapidly, there is fast pyrogenation, gasification, volatile matter nitrogen ratio is greatly improved, the oxygen content of super thick coal culm air-flow is extremely low, in volatile matter after coal pyrolytic gasified, reducing substances is many, thus volatile matter nitrogen generates stable N mostly in combustion2；After the volatile combustion of super thick coal culm air-flow, in succession with secondary dense air-flow and light powder air-flow progressively mixed combustion, owing to the coke in thick coal culm burns the most in succession, consumption to oxygen increases, cause light powder air-flow with dense powder air-flow mixing after-combustion still under Hypoxic habitats, simultaneously by the catalysis reduction of coke, thus coke nitrogen is converted into NOxRatio reduce.
Described method further includes steps of through burner, and dense powder, the volatile matter nitrogen of light powder and coal dust coke nitrogen burning conversion are N2After, supplement secondary wind in time, allow coal dust that high-temperature oxygen-enriched reaction occurs, extend in the burner hearth clean-burning time, thus fully after-flame, reduce fly ash combustible material, the content of CO in flue gas, it is achieved that the decoupling burning of fine coal.
Claims (7)
1. strengthening a pulverized coal decoupling combustor for shunting enrichment, including spout, deep or light split-flow baffles, upper collection powder is steady
Flame device, next part powder flame holder and middle part collection powder flame holder, it is characterised in that:
Described deep or light split-flow baffles is arranged at the middle part of spout, and outside the two ends up and down of deep or light split-flow baffles and spout
Housing connects；Spout is separated for through-flow light sidewind and two air-flows of dense sidewind respectively by deep or light split-flow baffles
Passage；
Described upper collection powder flame holder, next part powder flame holder and middle part collection powder flame holder are positioned at the passage one of logical dense sidewind
Side；The overall cross section of described upper collection powder flame holder, next part powder flame holder and middle part collection powder flame holder is flat taper, edge
Airflow direction, front elevational sectional is little, and rear end section is big；Described upper collection powder flame holder, next part powder flame holder and middle part collection powder
The cross section that flame holder is vertical with airflow direction is by the diminishing stepped knot of the lateral surface of orifice rim to center
Structure；
The lateral surface of described upper collection powder flame holder, next part powder flame holder and middle part collection powder flame holder is connected with spout, upper collection
Powder flame holder, next part powder flame holder the stepped side of medial surface relative, be provided with through-flow between relative medial surface
Space；Described middle part collection powder flame holder is arranged on the through-flow space between collection powder flame holder, next part powder flame holder, in
Portion collection powder flame holder upper and lower stepped prism respectively with upper collection powder flame holder, the medial surface of next part powder flame holder
Stepped side is relative, is respectively equipped with logical between middle part collection powder flame holder and upper collection powder flame holder, next part powder flame holder
The space of stream；
Each rank of described upper collection powder flame holder, next part powder flame holder and the relative side of middle part collection powder flame holder
Tread is designed with deversoir near deep or light split-flow baffles side；Described deversoir is steady for collecting powder along airflow direction compared with personal attendant
The cascaded surface of flame device and the strip structure of corresponding inclined-plane bending；One sidewall of described deversoir is along its length
It is close to be connected to the cascaded surface of collection powder flame holder and corresponding inclined-plane；Described each deversoir stops to be close to collect powder flame holder
Cascaded surface and the coal dust on corresponding inclined-plane, and make it with air flow direction deep or light split-flow baffles side.
The pulverized coal decoupling combustor strengthening shunting enrichment the most according to claim 1, it is characterised in that relatively
Collection powder flame holder deversoir along airflow direction spout outlet side be connected.
The pulverized coal decoupling combustor strengthening shunting enrichment the most according to claim 1, it is characterised in that collection powder
It is disposed with multiple deversoir to lateral separation, collection on each cascaded surface of the prism of flame holder and corresponding inclined-plane
Deversoir height on the same cascaded surface of the prism of powder flame holder is inconsistent, wherein, near the shunting of light powder side
Height of weir degree is the highest.
The pulverized coal decoupling combustor strengthening shunting enrichment the most according to claim 1, it is characterised in that described
Dense powder side diaphragm it is provided with in the gas channel of dense sidewind；Described dense powder side diaphragm is at the upper steady flame of collection powder
Spout outlet one end of the side of the close deep or light split-flow baffles of device, next part powder flame holder and middle part collection powder flame holder, will
Described upper collection powder flame holder, next part powder flame holder and middle part collection powder flame holder couple together.
The pulverized coal decoupling combustor strengthening shunting enrichment the most according to claim 4, it is characterised in that described
Dense powder side diaphragm is tight with the connection of middle part collection powder flame holder；Described dense powder side diaphragm and the upper steady flame of collection powder
Device, next part powder flame holder only at spout outlet one end compact siro spinning technology, are leaving gap near spout entrance one end.
The pulverized coal decoupling combustor strengthening shunting enrichment the most according to claim 1, it is characterised in that described
Nozzle shape uses the horn mouth of flaring.
The pulverized coal decoupling combustor strengthening shunting enrichment the most according to claim 1, it is characterised in that described
Middle part collection powder flame holder and upper and lower collection powder flame holder compared with the end face near spout outlet side, middle part collection powder is steady
The flame device end face near spout outlet side is further from spout outlet side.
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| CN201620159754.6U CN205504972U (en) | 2016-03-02 | 2016-03-02 | Buggy decoupling zero combustor of reinforcing reposition of redundant personnel densification |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152678A (en) * | 2016-03-02 | 2017-09-12 | 山西三合盛节能环保技术股份有限公司 | It is a kind of to strengthen the pulverized coal decoupling combustor and combustion method of shunting enrichment |
-
2016
- 2016-03-02 CN CN201620159754.6U patent/CN205504972U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152678A (en) * | 2016-03-02 | 2017-09-12 | 山西三合盛节能环保技术股份有限公司 | It is a kind of to strengthen the pulverized coal decoupling combustor and combustion method of shunting enrichment |
| CN107152678B (en) * | 2016-03-02 | 2019-08-30 | 山西三合盛节能环保技术股份有限公司 | A kind of enhancing shunts the pulverized coal decoupling combustor and combustion method of enrichment |
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