CN109574522A - A kind of sleeve kiln combustion system - Google Patents
A kind of sleeve kiln combustion system Download PDFInfo
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- CN109574522A CN109574522A CN201811594542.0A CN201811594542A CN109574522A CN 109574522 A CN109574522 A CN 109574522A CN 201811594542 A CN201811594542 A CN 201811594542A CN 109574522 A CN109574522 A CN 109574522A
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- Prior art keywords
- burner
- combustion chamber
- inner sleeve
- combustion
- tangential
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 182
- 239000000446 fuel Substances 0.000 claims abstract description 50
- 238000001816 cooling Methods 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 7
- 239000002912 waste gas Substances 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 122
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 12
- 239000003546 flue gas Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 4
- 239000004449 solid propellant Substances 0.000 claims description 4
- 206010030973 Oral discomfort Diseases 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 239000002817 coal dust Substances 0.000 abstract description 43
- 239000003245 coal Substances 0.000 description 23
- 239000007921 spray Substances 0.000 description 20
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 18
- 235000011941 Tilia x europaea Nutrition 0.000 description 18
- 239000004571 lime Substances 0.000 description 18
- 238000010304 firing Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 229940098458 powder spray Drugs 0.000 description 5
- 235000019738 Limestone Nutrition 0.000 description 3
- 239000003034 coal gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/12—Preheating, burning calcining or cooling in shaft or vertical furnaces
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
Abstract
The present invention relates to a kind of sleeve kiln combustion system, including kiln body, upper inner sleeve, lower inner sleeve, upper combustion chamber, lower combustion chamber and fair water cone, fair water cone is located at the exit of cooling zone inner sleeve.Upper inner sleeve is connect by waste gas outlet with exhaust pipe road, and upper combustion chamber and lower combustion chamber are respectively equipped with burner, and burner is connect with fuel conduit.Sleeve kiln is equipped with lower inner sleeve central burner nozzle and tangential burner, lower inner sleeve central burner nozzle is mounted on the top of fair water cone, in the chamber wall of upper combustion chamber and/or lower combustion chamber, lower inner sleeve central burner nozzle and tangential burner are connect tangential burner distributing installation with fuel conduit and combustion air pipeline.Coal dust concentrated combustion is changed to disperses combustion, effectively eliminates ash content the problem of arch bridge is formed about dross, avoid damage to arch bridge and obturator stream by the present invention by increasing lower inner sleeve central burner nozzle and the tangential burner in combustion chamber.
Description
Technical field
The invention belongs to technical field of combustion equipment, are related to a kind of limekiln combustion apparatus, and in particular to a kind of sleeve kiln
Combustion system.
Background technique
Industrial furnace of the sleeve kiln as efficient calcined limestone generallys use gas fuel combustion to provide thermal energy, gas
The easily controllable kiln temperature of fluid fuel burning, external sleeve kiln calcined limestone is mostly using combustion gas as fuel.Coal resources are at me
60% or so is accounted in state's non-renewable energy consumption structure, scholarly forecast, coal still accounts for 50% or so within 2050, this is to say, in
Too big variation will not occur in long time for production of energy and consumption structure of the state based on coal.Since domestic coal fires
Expect resourceful, the fuel use scope for needing to open up out sleeve kiln can just better adapt to market demands.
Prior art hub kiln is in upper lower combustion chamber's coal dust burner, Coal powder spray burning calcined limestone.Due to combustion chamber sky
Between it is limited, coal dust cannot be completely burned off in combustion chamber, causes part coal dust can't burn completely, increases heat consumption.Coal dust firing
Temperature is high, and the ash content after burning is easily formed about dross phenomenon in arch bridge, causes arch bridge damage and stream obstructing problem.
Summary of the invention
The object of the present invention is to provide a kind of sleeve kiln combustion systems, and the concentrated combustion of coal dust is changed to disperses combustion, excellent
Change the Nomenclature Composition and Structure of Complexes of combustion system, eliminates ash content the problem of arch bridge is formed about dross, improve sleeve kiln combustion system
Combustion efficiency improves sleeve kiln lime product quality, reduces energy consumption.
The technical scheme is that sleeve kiln combustion system, including kiln body, upper inner sleeve, lower inner sleeve, upper burning
Room, lower combustion chamber and fair water cone, fair water cone are located at the exit of inner sleeve under sleeve kiln cooling zone.Upper inner sleeve is gone out by exhaust gas
Mouth is connect with exhaust pipe road, and upper combustion chamber and lower combustion chamber are respectively equipped with burner, and burner is connect with fuel conduit.Sleeve kiln
Equipped with lower inner sleeve central burner nozzle and tangential burner, lower inner sleeve central burner nozzle is mounted on the top of fair water cone, tangential burner point
Cloth is mounted on the chamber wall of upper combustion chamber and/or lower combustion chamber, lower inner sleeve central burner nozzle and tangential burner and fuel conduit
It is connect with combustion air pipeline.
Sleeve kiln is equipped with driving air pipe line, driving vane pipe, injector and circulating flue gas outlet, and driving air pipe line passes through drive
Dynamic vane pipe and injector are connected to lower combustion chamber, and lower inner sleeve is connected to the ejection gas of injector by circulating flue gas outlet
Entrance.Lower inner sleeve is equipped with cooling sandwith layer, and sleeve kiln is equipped with combustion air endless tube and lower inner sleeve cooling air outlet, and cooling sandwith layer is logical
Cross down inner sleeve cooling air outlet and be connected to combustion air endless tube, combustion air endless tube by circulation combustion-supporting air pipe line be connected to burner and
The air intake of tangential burner.Sleeve kiln is equipped with blowdown piping, and the outlet of combustion air endless tube is connect with blowdown piping all the way, is vented
Pipeline is equipped with valve and flowmeter.
Upper combustion chamber and lower combustion chamber are columnar structured.Tangentially distributing installation is firing the tangential burner of upper combustion chamber
It burns on locular wall；The lower combustion chamber is equipped with driving air duct and unloads grey channel, drives air duct cutting along the chamber wall of lower combustion chamber
To arrangement, the outlet connection driving air duct of injector, the tangential burner of lower combustion chamber and driving air duct are pacified along tangential distribution in the same direction
On chamber wall.The quantity of the tangential burner of every combustion chamber (upper combustion chamber or lower combustion chamber) is 0~15.
Burner is the combination of gas fuel burner, liquid fuel burner or solid fuel burner or above-mentioned three kinds of burners.Under
Inner sleeve central burner nozzle and tangential burner are gas fuel burner, liquid fuel burner or solid fuel burner or three kinds above-mentioned
The combination of burner.
Sleeve kiln combustion system of the present invention is by the inner sleeve central burner nozzle under lower inner sleeve outlet installation, in upper combustion chamber
Increase tangential burner with lower combustion chamber, the concentrated combustion of coal dust is changed to disperses combustion, the structure and composition of optimum burningsystem,
The problem of ash content is effectively eliminated the problem of arch bridge is formed about dross, avoids damage arch bridge and stream obstruction, improves
The combustion efficiency of sleeve kiln combustion system is conducive to improve sleeve kiln lime product quality, reduces the energy consumption of lime production.
The burner and lower inner sleeve central burner nozzle, the tangential burner of the tangential burner of upper combustion chamber and lower combustion chamber of upper combustion chamber, lower combustion chamber
It can be used alone or be used in mixed way, be adjusted according to actual working conditions and fuel conditions, increase sleeve kiln calcination operation
Flexibility.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of sleeve kiln combustion system of the present invention；
Fig. 2 is the structural schematic diagram at the burner of lower combustion chamber；
Fig. 3 is the structural schematic diagram at the burner of upper combustion chamber.
1-driving vane pipe, 2-combustion air endless tubes, 3-arch bridges, 4-upper combustion chamber, 5-cooling sandwith layers, 6-cooling winds
Pipeline, 7-blowdown pipings, 8-waste gas outlets, 9-upper inner sleeves, 10-lower combustion chamber, 11-lower inner sleeves, 12-lower inner sleeves
Cylinder central burner nozzle, 13-ash-unloading tube roads, 14-burners, 15-combustion-supporting air pipe lines, the outlet of 16-circulating flue gas, 17-injectors,
18-driving air ducts, 19-tangential burners, 20-kiln bodies, 21-unload grey channel, 22-lower inner sleeve cooling air outlets, 23-lead
Flow cap, 24-chamber walls.
Specific embodiment
Below with reference to embodiment and attached drawing, the present invention is described in detail.The scope of protection of the present invention is not limited to the embodiment,
Those skilled in the art make any change within the scope of the claims and also belong to the scope of protection of the invention.
Embodiment 1
Sleeve kiln combustion system of the present invention as shown in Figure 1, include kiln body 20, upper inner sleeve 9, lower inner sleeve 11, upper combustion chamber 4,
Lower combustion chamber 10, drives vane pipe 1, combustion air endless tube 2, injector 17, lower inner sleeve central burner nozzle 12 and leads driving air pipe line
Flow cap 23.Upper inner sleeve is connect by waste gas outlet 8 with exhaust pipe road.Fair water cone is located at inner sleeve under lower sleeve kiln cooling zone
The exit of cylinder 11, lower inner sleeve central burner nozzle 12 are mounted on the top of fair water cone.Combustion chamber (including upper combustion chamber 4 and lower combustion
Burn room 10) it is ring structure.The shaft core position of upper combustion chamber's import is equipped with burner 14, and lower combustion chamber is equipped with burner 14 and tangential burning
Mouth 19, burner 14 and tangential burner 19 are connect with fuel conduit, and fuel conduit is connected to breeze blowing and metering units.Lower inner sleeve
Cylinder 11 is equipped with cooling sandwith layer 5, for cooling lower inner sleeve.Cooling sandwith layer is connected to combustion-supporting by lower inner sleeve cooling air outlet 22
Vane pipe 2, combustion air endless tube 2 are connected to the air intake of burner 4 and tangential burner 19 by combustion-supporting air pipe line 15.Combustion-supporting vane
What pipe 2 exported connect with blowdown piping 7 all the way, and blowdown piping is equipped with valve and flowmeter.
As shown in Fig. 2, lower combustion chamber is equipped with driving air duct 18, unloads grey channel 21 and chamber wall 24.The burning of lower combustion chamber
Mouth 14 is one, is mounted on the shaft core position of combustion chamber import.The quantity of the tangential burner 19 of lower combustion chamber is 10, tangential burner 19
Tangentially distributing installation is on the chamber wall 24 of lower combustion chamber.Drive air duct 18 identical as the rotation direction of tangential burner 19, also edge
The arranged tangential of chamber wall.Driving air pipe line is by driving vane pipe 1 to be connected to 17 working gas entrance of injector, lower inner sleeve
Cylinder 11 is connected to the ejection gas entrance of injector by circulating flue gas outlet 16, and the outlet of injector 17 is connected to lower combustion chamber 10
Driving air duct 18.
The burner 4 of upper combustion chamber, the burner 4 of lower combustion chamber, the tangential burner of lower inner sleeve central burner nozzle 12 and lower combustion chamber
19 can be used alone or be used in mixed way, and are adjusted according to actual working conditions and fuel conditions, can be with coal dust burner and gas
Fuel nozzle is used in mixed way, and adjusts the usage amount of its fuel.
When 300t/d yield, upper combustion chamber 4,10 normal use gas fuel burner of lower combustion chamber, lower inner sleeve center are burnt
Mouth and tangential burner are coal dust burner, and the tangential burner of lower inner sleeve central burner nozzle and lower combustion chamber starts to spray into coal dust firing.
Lower combustion chamber's gas fuel burner is reduced to gas volume simultaneously, and the heat of the gas volume of reduction is equal to the heat for increasing coal dust.
Lower combustion chamber's gas fuel burner gradually reduces gas volume, and gas volume is reduced to half.It is sprayed with inner sleeve central burner nozzle 12 at present
Coal dust amount be stepped up the temperature to 160 kgs/hr, in lower inner sleeve from 800 DEG C under gas burning state step up for
1000℃.The lime cooling wind of lower inner sleeve is used as the Secondary Air of lower inner sleeve central burner nozzle, the exhaust gas and not of burning
Reacted lime cooling wind and and the exhaust gas that flows down, burnt by the driving of driving wind to lower inner sleeve by circulating flue gas outlet
It is indoor combustion-supporting.The tangential burner 19 of lower combustion chamber gradually sprays into 540 kgs/hr of coal dusts (coal dusts of 6000 kilocalories), coal dust and drive
Dynamic wind is sufficiently mixed and burns with the inner sleeve exhaust gas to be got off by driving, enters combustion chamber jointly.Due to being tangentially to spray into, increase
The burning time of coal dust, makes its full combustion after-flame, avoid exhaust gas and enter phenomenon also uncombusted under arch bridge, reduce
Dross and blocking channel problem.The exhaust gas 30 percent of its after-flame enters lower inner sleeve as cocurrent exhaust gas, and 70 percent
Exhaust gas be further separated into that kiln annular channel is upward under arch bridge, pass through burning zone and preheating zone with the exhaust gas that upper combustion chamber generates
After expel from kiln.
Embodiment 2
The present embodiment is identical as the structure of embodiment 1, and technique is slightly different: when 300t/d yield, upper combustion chamber 4, lower combustion chamber
10 normal use gas fuel burners, lower inner sleeve central burner nozzle 19 and tangential burner are coal dust burner.It burns at lower inner sleeve center
Mouth 19 and tangential burner spray into coal dust firing, while lower combustion chamber's gas fuel burner is reduced to gas volume, the gas volume of reduction
Heat be equal to increase coal dust heat.Lower combustion chamber's gas fuel burner is gradually reduced to gas volume, until coal gas is complete
Stop supply；It is stepped up with inner sleeve central burner nozzle Coal powder spray amount at present to 160/ hour kilogram, the temperature in lower inner sleeve
Step up from 800 DEG C under gas burning state is 1000 DEG C.The lime cooling wind of lower inner sleeve is as lower inner sleeve central burner nozzle
Secondary Air use, the complete lime cooling wind of exhaust gas and unreacted of burning and and the exhaust gas that flows down, pass through circulating flue gas
Outlet, by the driving to lower inner sleeve combustion chamber of driving wind.The tangential burner of lower combustion chamber gradually sprays into 1240 kgs/hr of coal dusts
(coal dusts of 6000 kilocalories), coal dust and driving wind are sufficiently mixed and burn with the inner sleeve exhaust gas to be got off by driving, common to enter
Combustion chamber.Due to being tangentially to spray into, the burning time of coal dust is increased, makes its full combustion after-flame, avoids exhaust gas and enter
Also uncombusted phenomenon under arch bridge, reduces dross and blocking channel problem.The exhaust gas 30 percent of its after-flame is used as cocurrent
Exhaust gas enters lower inner sleeve, and it is upward that 70 percent exhaust gas is further separated into kiln annular channel under arch bridge, with upper combustion chamber
The exhaust gas of generation expels from kiln after burning zone and preheating zone.
Embodiment 3
The present embodiment is identical as the structure of embodiment 1, and technique is slightly different: when 300t/d yield, upper combustion chamber 4, lower combustion chamber
10 normal use gas fuel burners, the tangential burner of lower combustion chamber start to spray into coal dust firing, while lower combustion chamber's gaseous fuel
Burner is reduced to gas volume, and the heat of the gas volume of reduction is equal to the heat for increasing coal dust.Lower combustion chamber's gas fuel burner
It gradually reduces to gas volume, gas volume is reduced to half.Lower inner sleeve lime cooling wind and and the exhaust gas that flows down, pass through circulation
Exhanst gas outlet, by the driving to lower inner sleeve combustion chamber of driving wind.The tangential burner of lower combustion chamber gradually sprays into 700 kgs/hr
Coal dust (coal dusts of 6000 kilocalories), coal dust and driving wind are sufficiently mixed and burn with the inner sleeve exhaust gas to be got off by driving, altogether
It is same to enter combustion chamber.Due to being tangentially to spray into, the burning time of coal dust is increased, makes its full combustion after-flame, avoids exhaust gas
Phenomenon also uncombusted under arch bridge is entered, dross and blocking channel problem are reduced.The exhaust gas 30 percent of its after-flame is made
Reenter lower inner sleeve for cocurrent exhaust gas, 70 percent exhaust gas from circulating flue gas outlet 16 enter kiln annular channels to
On, the exhaust gas generated with upper combustion chamber expels from kiln after burning zone and preheating zone.
Embodiment 4
The present embodiment is identical as the structure of embodiment 1, and technique is slightly different: when 600t/d yield, upper combustion chamber 4, lower combustion chamber
10 normal use gas fuel burners, lower inner sleeve central burner nozzle 12 starts to spray into coal dust firing, while lower combustion chamber's gas fires
Material burner is reduced to gas volume, and the heat of the gas volume of reduction is equal to the heat of increased coal dust.Lower combustion chamber's gaseous fuel
Burner is gradually reduced to gas volume, and gas volume reduces 24 percent.Gradually with inner sleeve central burner nozzle Coal powder spray amount at present
Increase to 650 kgs/hr, it is 1200 DEG C that the temperature in lower inner sleeve is stepped up from 800 DEG C under gas burning state.Lower inner sleeve
The lime cooling wind of cylinder is used as the Secondary Air of lower inner sleeve central burner nozzle, and the lime that the exhaust gas and unreacted of burning are complete is cold
But wind and and the exhaust gas that flows down, exported by circulating flue gas, by the driving to lower inner sleeve combustion chamber of driving wind.It is fired with gas
The exhaust gas that material burner generates is mixed into lime burning in kiln, the exhaust gas 30 percent of after-flame as cocurrent exhaust gas again into
Enter lower inner sleeve, 70 percent exhaust gas is further separated into that kiln annular channel is upward under arch bridge, generates with upper combustion chamber
Exhaust gas expels from kiln after burning zone and preheating zone.Part coal dust reduces gas using quantity instead of coal gas, increases sleeve
The scope of application of the fuel of kiln.
Embodiment 5
The present embodiment is with 1 difference of embodiment: as shown in figure 3, upper combustion chamber also is provided with tangential burner 19, upper combustion chamber is
Columnar structured, the center of combustion chamber import is along axially mounted burner 4.Tangentially distributing installation exists the tangential burner 19 of combustion chamber
On chamber wall 24, tangential burner is connect with fuel conduit and combustion air pipeline.
When 600t/d yield, upper combustion chamber 4,10 normal use gas fuel burner of lower combustion chamber, lower inner sleeve center are burnt
Mouth and tangential burner are coal dust burner, and the tangential burner of lower inner sleeve central burner nozzle and upper and lower combustion chamber starts to spray into coal dust combustion
It burns.Upper and lower combustion chamber gases fuel nozzle is reduced to gas volume simultaneously, and the heat of the gas volume of reduction, which is equal to, increases coal dust
Heat.Lower combustion chamber's gas fuel burner gradually reduces gas volume, and gas volume is reduced to half.With inner sleeve central burner nozzle at present
12 Coal powder spray amounts are stepped up the temperature to 320 kgs/hr, in lower inner sleeve and step up from 800 DEG C under gas burning state
It is 1000 DEG C.The lime cooling wind of lower inner sleeve is used as the Secondary Air of lower inner sleeve central burner nozzle, burning exhaust gas and
The complete lime cooling wind of unreacted and and the exhaust gas that flows down, fired by the driving of driving wind to lower inner sleeve by circulating flue gas outlet
It burns indoor combustion-supporting.The tangential burner 19 of lower combustion chamber gradually sprays into 1080 kgs/hr of coal dusts (coal dusts of 6000 kilocalories), coal dust and
Driving wind is sufficiently mixed and burns with the inner sleeve exhaust gas to be got off by driving, enters combustion chamber jointly.The tangential burner of upper combustion chamber
19 gradually spray into 520 kgs/hr of coal dusts (coal dusts of 6000 kilocalories), and coal dust burns in tangential direction and the gas of upper combustion chamber
The exhaust gas of fuel nozzle burning is sufficiently mixed the common circular passage lime burning between the inner cylinder and outer cylinder of sleeve kiln.By
Then tangential to spray into, the burning time of coal dust is increased, its full combustion after-flame is made, exhaust gas is avoided and enters under arch bridge also not
The phenomenon that after-flame, reduces dross and blocking channel problem.The exhaust gas 30 percent of its lower combustion chamber's after-flame is useless as cocurrent
Gas enters lower inner sleeve, and it is upward that 70 percent exhaust gas is further separated into kiln annular channel under arch bridge, produces with upper combustion chamber
Raw exhaust gas expels from kiln after burning zone and preheating zone.
Embodiment 6
The structure of the present embodiment and embodiment 5 is just as operational process is slightly different: when 600t/d yield, upper combustion chamber 4, lower combustion
10 normal use gas fuel burner of room is burnt, lower inner sleeve central burner nozzle and tangential burner are coal dust burner, lower inner sleeve center
Burner and the tangential burner of upper combustion chamber start to spray into coal dust firing.Upper and lower combustion chamber gases fuel nozzle is reduced to coal simultaneously
Tolerance, the heat of the gas volume of reduction are equal to the heat for increasing coal dust.Upper combustion chamber's gas fuel burner gradually reduces coal gas
Amount, gas volume are reduced to half；Lower combustion chamber's gas fuel burner gradually reduces gas volume, and gas volume reduces 1 12.
The temperature to 320 kgs/hr, in lower inner sleeve, which is stepped up, with 12 Coal powder spray amount of inner sleeve central burner nozzle at present burns shape from gas
It is 1000 DEG C that 800 DEG C under state, which step up,.Secondary Air of the lime cooling wind of lower inner sleeve as lower inner sleeve central burner nozzle
Use, the complete lime cooling wind of exhaust gas and unreacted of burning and and the exhaust gas that flows down, driven by circulating flue gas outlet
Dynamic wind drives to combustion-supporting in lower inner sleeve combustion chamber.The tangential burner 19 of upper combustion chamber gradually sprays into 520 kgs/hr of coal dusts
(coal dusts of 6000 kilocalories), coal dust burns in tangential direction and the exhaust gas of the gas fuel burner of upper combustion chamber burning is sufficiently mixed
The common circular passage lime burning between the inner cylinder and outer cylinder of sleeve kiln.Due to being tangentially to spray into, coal dust is increased
Burning time makes its full combustion after-flame, avoids exhaust gas and enters phenomenon also uncombusted under arch bridge, reduces dross and blocks up
Fill in access issues.The exhaust gas 30 percent of its lower combustion chamber's after-flame enters lower inner sleeve as cocurrent exhaust gas, and 70 percent
Exhaust gas be further separated into that kiln annular channel is upward under arch bridge, pass through burning zone and preheating zone with the exhaust gas that upper combustion chamber generates
After expel from kiln.
Embodiment 7
The structure of the present embodiment and embodiment 5 is just as operational process is slightly different: when 600t/d yield, upper combustion chamber 4, lower combustion
10 normal use gas fuel burner of room is burnt, tangential burner is coal dust burner, and the tangential burner of upper combustion chamber starts to spray into coal dust
Burning.Upper combustion chamber's gas fuel burner is reduced to gas volume simultaneously, and the heat of the gas volume of reduction, which is equal to, increases coal dust
Heat.Upper combustion chamber's gas fuel burner gradually reduces gas volume, and gas volume is reduced to half.The tangential burner 19 of upper combustion chamber by
Step sprays into 520 kgs/hr of coal dusts (coal dusts of 6000 kilocalories), and coal dust burns in tangential direction and the gaseous fuel of upper combustion chamber
The exhaust gas of burner combustion is sufficiently mixed the common circular passage lime burning between the inner cylinder and outer cylinder of sleeve kiln.Due to being
It is tangential to spray into, increase the burning time of coal dust, make its full combustion after-flame, avoid exhaust gas enter it is also uncombusted under arch bridge
The phenomenon that, reduce dross and blocking channel problem.The exhaust gas 30 percent of its lower combustion chamber's after-flame as cocurrent exhaust gas into
Enter lower inner sleeve, 70 percent exhaust gas is further separated into that kiln annular channel is upward under arch bridge, generates with upper combustion chamber
Exhaust gas expels from kiln after burning zone and preheating zone.
Claims (6)
1. a kind of sleeve kiln combustion system, including kiln body (20), upper inner sleeve (9), lower inner sleeve (11), upper combustion chamber (4), under
Combustion chamber (10) and fair water cone (23), the fair water cone are located at the exit of inner sleeve (11) under sleeve kiln cooling zone；On described
Inner sleeve is connect by waste gas outlet (8) with exhaust pipe road, and the upper combustion chamber and lower combustion chamber are respectively equipped with burner
(14), the burner is connect with fuel conduit, feature: the sleeve kiln is equipped with lower inner sleeve central burner nozzle (12) and tangential burning
Mouth (19), the lower inner sleeve central burner nozzle are mounted on the top of fair water cone, and the tangential burner distributing installation is in upper combustion chamber
And/or the chamber wall (24) of lower combustion chamber, lower inner sleeve central burner nozzle and tangential burner and fuel conduit and combustion-aid air pipe
Road connection.
2. sleeve kiln combustion system according to claim 1, it is characterized in that: the sleeve kiln is equipped with driving air pipe line, drives
Dynamic vane pipe (1), injector (17) and circulating flue gas outlet (16), the driving air pipe line is by driving vane pipe (1) and draws
Emitter (17) is connected to lower combustion chamber (10), and the lower inner sleeve (11) is connected to injector by circulating flue gas outlet (16)
Ejection gas entrance.
3. sleeve kiln combustion system according to claim 1, it is characterized in that: the lower inner sleeve (11) is equipped with cooling folder
Layer, the sleeve kiln is equipped with combustion air endless tube (2) and lower inner sleeve cooling air outlet (22), the cooling sandwith layer pass through lower inner sleeve
Cylinder cooling air outlet (22) is connected to combustion air endless tube (2), and the combustion air endless tube (2) is connected by circulation combustion-supporting air pipe line (15)
It is connected to the air intake of burner (4) and tangential burner (19).
4. sleeve kiln combustion system according to claim 2, it is characterized in that: the sleeve kiln is equipped with blowdown piping (7), institute
Connecting all the way with blowdown piping for combustion air endless tube (2) outlet is stated, the blowdown piping is equipped with valve and flowmeter.
5. sleeve kiln combustion system according to claim 2, it is characterized in that: the upper combustion chamber (4) and lower combustion chamber
It (10) is columnar structured；The tangential burner (19) of the upper combustion chamber tangentially distributing installation on chamber wall (24)；
The lower combustion chamber is equipped with driving air duct (18) and unloads grey channel (21), chamber wall of driving air duct (18) along lower combustion chamber
(24) arranged tangential, outlet connection driving air duct (18) of injector (17), the tangential burner (19) of lower combustion chamber and driving
Air duct is mounted on chamber wall along tangential distribution in the same direction；The quantity of the tangential burner of every combustion chamber is 0~15.
6. sleeve kiln combustion system according to claim 1, it is characterized in that: the burner is gas fuel burner, liquid
The combination of fuel nozzle or solid fuel burner or above-mentioned three kinds of burners；The lower inner sleeve central burner nozzle (12) and tangential burning
Mouth (19) is the combination of gas fuel burner, liquid fuel burner or solid fuel burner or above-mentioned three kinds of burners.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594542.0A CN109574522A (en) | 2018-12-25 | 2018-12-25 | A kind of sleeve kiln combustion system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594542.0A CN109574522A (en) | 2018-12-25 | 2018-12-25 | A kind of sleeve kiln combustion system |
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| Publication Number | Publication Date |
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| CN109574522A true CN109574522A (en) | 2019-04-05 |
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| CN201811594542.0A Pending CN109574522A (en) | 2018-12-25 | 2018-12-25 | A kind of sleeve kiln combustion system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020258636A1 (en) * | 2019-06-28 | 2020-12-30 | 江苏中圣园科技股份有限公司 | Sleeve kiln using natural gas as fuel |
| WO2021068312A1 (en) * | 2019-10-11 | 2021-04-15 | 江苏中圣园科技股份有限公司 | Anti-nodulation structure of flow guide cap of sleeve kiln |
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| US4431407A (en) * | 1981-10-13 | 1984-02-14 | Ulrich Beckenbach | Process for burning limestone, dolomite or the like and annular shaft furnace for performing the same |
| CN102072648A (en) * | 2011-01-20 | 2011-05-25 | 江苏中圣园科技股份有限公司 | Flameless combustion annular sleeve kiln |
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| WO2020258636A1 (en) * | 2019-06-28 | 2020-12-30 | 江苏中圣园科技股份有限公司 | Sleeve kiln using natural gas as fuel |
| WO2021068312A1 (en) * | 2019-10-11 | 2021-04-15 | 江苏中圣园科技股份有限公司 | Anti-nodulation structure of flow guide cap of sleeve kiln |
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