CN109140429B - Wood chip fluidized bed boiler combustion system - Google Patents
Wood chip fluidized bed boiler combustion system Download PDFInfo
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- CN109140429B CN109140429B CN201811045870.5A CN201811045870A CN109140429B CN 109140429 B CN109140429 B CN 109140429B CN 201811045870 A CN201811045870 A CN 201811045870A CN 109140429 B CN109140429 B CN 109140429B
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- inlet
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- fluidized bed
- temporary storage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/22—Fuel feeders specially adapted for fluidised bed combustion apparatus
Abstract
The invention provides a wood chip fluidized bed boiler combustion system, comprising: the temporary storage bin is arranged in a vertical structure, a first inlet is formed in the upper end of the temporary storage bin, a conveying belt is arranged on the first inlet, and a first outlet is formed in the lower end of the temporary storage bin; the conveying device comprises a second inlet and a second outlet, the second inlet is matched and connected with the first outlet, the second outlet is connected with a blanking air seal device, and the second outlet is connected with the inlet end of the blanking air seal device; the air supply device comprises a blanking pipe, the blanking pipe comprises a third inlet and a third outlet, the third inlet is connected with an air feeder, and the outlet end of the blanking air seal machine is connected to the position, close to the third inlet, of the side end of the blanking pipe through a pipeline bypass; the third inlet of the fluidized bed boiler is connected into the hearth of the fluidized bed boiler in a penetrating way through the pipeline.
Description
Technical Field
The invention relates to the technical field of fluidized bed boilers, in particular to a wood chip fluidized bed boiler combustion system.
Background
At present, a large amount of broken wood chips are left after a wood chip screen in the paper making industry and are discarded randomly before, so that not only is environmental pollution caused, but also energy waste is caused, and the calorific value of the wood chips is about 2500-.
Burning exists in the biological combustion stove and needs once only to put in the burning saw-dust, can't realize sending into in succession, and the burning is unstable, and the unable fine control of stove burning temperature, time is little for a long time, needs fuel constantly to overturn simultaneously, otherwise can cause the problem that the burning is insufficient, the thermal efficiency is low.
At present, some sawdust is combusted in a chain boiler or a biomass boiler, and the sawdust and coal used by the boiler are directly mixed and then enter the boiler for combustion in the chain boiler, but the mixed combustion causes insufficient combustion of part of the sawdust, so that the time and labor are wasted, the efficiency is poor, and meanwhile, the mixed combustion amount of the sawdust is too small to completely treat redundant sawdust; and along with the development of technology, chain boiler is eliminated gradually now, is replaced by fluidized bed boiler gradually, but fluidized bed boiler furnace belongs to the malleation, and the saw-dust proportion is less, can not directly convey into the boiler and burn.
Disclosure of Invention
The invention provides a sawdust fluidized bed boiler combustion system with simple structure, convenient operation, large regulation ratio and high combustion efficiency, which comprises:
the temporary storage bin is arranged in a vertical structure, a first inlet is formed in the upper end of the temporary storage bin, a conveying belt is arranged on the first inlet, and a first outlet is formed in the lower end of the temporary storage bin;
the conveying device comprises a second inlet and a second outlet, the second inlet is matched and connected with the first outlet, the second outlet is connected with a blanking air seal device, and the second outlet is connected with the inlet end of the blanking air seal device;
the air supply device comprises a blanking pipe, the blanking pipe comprises a third inlet and a third outlet, the third inlet is connected with an air feeder, and the outlet end of the blanking air seal machine is connected to the position, close to the third inlet, of the side end of the blanking pipe through a pipeline bypass;
and the third inlet of the fluidized bed boiler is connected in the hearth of the fluidized bed boiler in a penetrating way through a pipeline.
Preferably, the blanking pipe is arranged in an inclined mode, the vertical height of a third inlet relative to the ground is higher than the vertical height of a third outlet relative to the ground, the side end of the blanking pipe is connected with a secondary air pipeline, one end of the secondary air pipeline is connected into the fluidized bed boiler furnace in a penetrating mode, and the other end of the secondary air pipeline is connected to the side end of the blanking pipe in a penetrating mode and is close to the second outlet.
Preferably, the section of the side end of the temporary storage bin, which is close to the first outlet position, is designed to be a bucket-shaped structure, a stirring device is arranged in the temporary storage bin, the stirring device comprises a stirring shaft and stirring blades, the stirring shaft is vertically arranged at the central shaft end position of the temporary storage bin, a plurality of stirring blades are arranged on the stirring shaft, the upper end of the temporary storage bin is provided with a driving motor which is matched with the stirring shaft to rotate, the rotating output end of the driving motor is connected with the stirring shaft through a belt, a support frame is arranged in the temporary storage bin, the support frame comprises a fixing ring, the stirring shaft is provided with a stepped shaft which is matched with the fixing ring to be fixedly connected, the stepped shaft is rotatably connected with an inner ring of the fixing ring, an outer ring of the fixing ring is connected to the inner wall of the temporary storage bin through a plurality of connecting rods, the, the center line of the helical blade is formed by winding along a cylindrical helical line taking the stirring shaft as the center.
Preferably, the helical blade outer diameter is equal to the first outlet inner diameter.
Preferably, the third inlet is provided with a wind distribution device, and the wind distribution device includes:
the outer surface of the air distribution cylinder is provided with a plurality of through holes in a penetrating mode, the outer diameter of the air distribution cylinder is slightly smaller than the inner diameter of the third inlet, a clamping ring is annularly arranged on the outer wall of the air distribution cylinder close to the opening end of the air distribution cylinder, the diameter of the clamping ring is larger than the inner diameter of the third inlet, and the clamping ring is clamped in a mating flange matched with the third inlet in use;
the spoiler is connected to the central position of the bottom of the air distribution cylinder through a connecting rod, the cross section of the spoiler is in a convex ellipsoid shape, the vertical end of the spoiler is connected to the bottom of the air distribution cylinder through the connecting rod, and the spherical end of the spoiler is close to the third inlet.
Preferably, the outer surface of the air distribution cylinder is wrapped with a wire mesh.
Preferably, the spoiler is divided into two sections from the central symmetrical axis position, and the two sections are respectively connected to the bottom position of the air distribution cylinder through connecting rods, and a preset distance is reserved at the splicing end position of the two sections of the spoiler.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a first flow chart of a combustion system of a wood chip fluidized bed boiler in an embodiment of the invention;
FIG. 2 is a flow chart of a combustion system of a wood chip fluidized bed boiler in the embodiment of the invention;
FIG. 3 is a schematic diagram of a temporary storage bin of a combustion system of a sawdust fluidized bed boiler according to an embodiment of the present invention;
fig. 4 is a structural diagram of an air distribution device of a combustion system of a sawdust fluidized bed boiler in the embodiment of the invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
As shown in fig. 1, an embodiment of the present invention provides a combustion system of a wood chip fluidized bed boiler, comprising:
the temporary storage bin 1 is arranged in a vertical structure, a first inlet 1-1 is formed in the upper end of the temporary storage bin 1, a conveying belt 1-3 is arranged on the first inlet 1-1, and a first outlet 1-2 is formed in the lower end of the temporary storage bin 1;
the conveying device 2 comprises a second inlet 2-1 and a second outlet 2-2, the second inlet 2-1 is connected with the first outlet 1-2 in a matching manner, the second outlet 2-2 is connected with a blanking air seal machine 2-3, and the second outlet 2-2 is connected with the inlet end of the blanking air seal machine 2-3;
the air supply device 4 comprises a blanking pipe 4-1, the blanking pipe 4-1 comprises a third inlet 4-11 and a third outlet 4-12, the third inlet 4-11 is connected with an air supply blower, and the outlet end of the blanking air seal machine 2-3 is connected to the position, close to the third inlet 4-11, of the side end of the blanking pipe 4-1 through a pipeline in a bypass mode;
the third inlet 4-11 is connected in the hearth of the fluidized bed boiler 6 through a pipeline.
The working principle of the technical scheme is as follows: sawdust is conveyed to a temporary storage bin 1 from a first inlet 1-1 through a conveying belt 1-3, then falls into a conveying device 2 from a second inlet 2-1 through a first outlet 1-2, is conveyed into a blanking air seal device 2-3 from a second outlet 2-2 in the conveying device 2, and is conveyed into an air supply device 4 through the blanking air seal device 2-3, is conveyed into a blanking pipe 4-1 through the blanking air seal device 2-3, is conveyed into a third outlet 4-12 through an air supply machine arranged at a third inlet 4-11 in the blanking pipe 4-1, and is conveyed into a hearth of a fluidized bed boiler 6 through the third outlet 4-12.
The beneficial effects of the above technical scheme are: when the invention is used, the whole set of system runs in a positive pressure environment, the air pressure of the system is greater than the pressure in the hearth, the whole set of system is safe and reliable, the sawdust can be continuously and stably fed into the hearth of the fluidized bed boiler 6, the combustion in the boiler is stable, the boiler operation is the same as the coal combustion, the whole set of system does not need the field operation of personnel, and only the sawdust conveying amount of the blanking air seal machine 2-3 and the air volume of the air feeder need to be adjusted according to the combustion requirement of the boiler, when the invention is used, as the sawdust is blown into the hearth of the fluidized bed boiler 6 by the air feeder through the blanking pipe 4-1, the sawdust is distributed very dispersedly and uniformly in the hearth of the fluidized bed boiler 6, the phenomena of sawdust aggregation and uneven distribution can not exist, the conveying device 2 can be conveyed by a belt or a spiral conveyor, the blanking air seal device 2-3 is of an anti-blocking type and small-gap type, the gap is not more than 0.5mm, a circular structure is adopted, sawdust can be prevented from being accumulated, and blockage is prevented, the length of a connecting pipeline between the outlet end of the blanking air seal device 2-3 and the blanking pipe 4-1 is not too large, and is not more than 1000mm, preferably less than 500mm, and sawdust is prevented from being blocked in the pipeline; the normal operation pressure in the hearth of the fluidized bed boiler 6 is about 2KPa, and the wind pressure of the air supply device 4 is more than 5KPa, preferably 8KPa, greater than the pressure in the hearth of the fluidized bed boiler 6; the wind speed in the blanking pipe 4-1 is not less than 5m/s, preferably 10 m/s.
As shown in fig. 2, in one embodiment, the feeding pipe 4-1 is disposed in an inclined manner, a vertical height of the third inlet 4-11 relative to the ground is higher than a vertical height of the third outlet 4-12 relative to the ground, a secondary air pipe 7 is connected to a side end of the feeding pipe 4-1, one end of the secondary air pipe 7 is connected to the furnace of the fluidized bed boiler 6 in a penetrating manner, and the other end of the secondary air pipe 7 is connected to a side end of the feeding pipe 4-1 in a penetrating manner near to the second outlet 4-12.
The working principle and the beneficial effects of the technical scheme are as follows: the feeding pipe 4-1 is obliquely arranged, so that sawdust can be better conveyed in the feeding pipe 4-1, the sawdust can be directly blown into a hearth of the fluidized bed boiler 6 at the lower part of the secondary air pipeline 7 by utilizing secondary air in the secondary air pipeline 7, the combustion efficiency is improved, an air blower connected to the third inlet 4-11 and the feeding pipe 4-1 are on the same straight line as much as possible, the angle is not less than 120 degrees, preferably 180 degrees, the air supply temperature of the air blower is not lower than 20 ℃ of the secondary air led into the feeding pipe 4-1 through the secondary air pipeline 7, preferably, the temperature of the air blower and the temperature of the feeding pipe are the same, and the vertical height of one end, close to the feeding pipe 4-1, of the secondary air pipeline 7 relative to the ground is more than 500mm higher than that of the third outlet 4-12 relative.
As shown in fig. 3, as an alternative embodiment, the present invention improves the structure of the temporary storage bin 1, and specifically includes: the section of the side end of the temporary storage bin 1, which is close to the first outlet 1-2, is designed to be a bucket-shaped structure, a stirring device 5 is arranged in the temporary storage bin 1, the stirring device 5 comprises a stirring shaft 5-1 and stirring blades 5-2, the stirring shaft 5-1 is vertically arranged at the central shaft end position of the temporary storage bin 1, the stirring blades 5-2 are arranged on the stirring shaft 5-1, the upper end of the temporary storage bin 1 is provided with a driving motor 5-3 which is matched with the stirring shaft 5-1 to rotate, the rotating output end of the driving motor 5-3 is connected with the stirring shaft 5-1 through a belt, a support frame 5-4 is arranged in the temporary storage bin 1, the support frame 5-4 comprises a fixing ring 5-41, and a stepped shaft which is fixedly connected with the fixing ring 5-41 is arranged on the stirring shaft, the stepped shaft is rotatably connected to the inner ring of the fixing ring 5-41, the outer ring of the fixing ring 5-41 is connected to the inner wall of the temporary storage bin 1 through a plurality of connecting rods 5-42, the stirring shaft 5-1 is concentrically arranged at the central position of the first outlet 1-2, the side end of the stirring shaft 5-1 is provided with a helical blade 5-5 at the position close to the first outlet 1-2, and the central line of the helical blade 5-5 is formed by winding along a cylindrical spiral line taking the stirring shaft 5-1 as the center.
The working principle and the beneficial effects of the technical scheme are as follows: in order to prevent the wood chips conveyed into the temporary storage bin 1 through the first inlet 1-1 from being accumulated and hardened therein, and the discharge of the first outlet 1-2 is interrupted, a stirring device 5 is arranged in the temporary storage bin 1, the stirring device 5 is connected into the temporary storage bin 1 through a support frame 5-4, a driving motor 5-3 drives a stirring shaft 5-1 to rotate, so that the stirring blades 5-2 stir the wood chips in the temporary storage bin 1, and the wood chips are guided into the first outlet 1-2 by using the spiral blades 5-5.
In one embodiment, the helical blades 5-5 have an outer diameter equal to the inner diameter of the first outlet 1-2.
The working principle and the beneficial effects of the technical scheme are as follows: the external diameter of the helical blade 5-5 is equal to the internal diameter of the first outlet 1-2, thereby facilitating the control of the discharging action of the first outlet 1-2.
As shown in fig. 4, in one embodiment, the third inlet 4-11 is provided with a wind distribution device 8, and the wind distribution device 8 comprises:
the outer surface of the air distribution barrel 8-1 is provided with a plurality of through holes in a penetrating mode, the outer diameter of the air distribution barrel 8-1 is slightly smaller than the inner diameter of the third inlet 4-11, a clamping ring 8-3 is annularly arranged on the outer wall of the air distribution barrel 8-1 close to the opening end of the air distribution barrel, the diameter of the clamping ring 8-3 is larger than the inner diameter of the third inlet 4-11, and the clamping ring 8-3 is clamped in a mating flange matched with the third inlet 4-11 in use;
the spoiler 8-2 is connected to the position of the center of the bottom of the air distribution cylinder 8-1 through a connecting rod 8-21, the cross section of the spoiler 8-2 is in a convex ellipsoid shape, the vertical end of the spoiler is connected to the position of the bottom of the air distribution cylinder 8-1 through the connecting rod 8-21, and the spherical end of the spoiler is close to the third inlet 4-11.
The working principle and the beneficial effects of the technical scheme are as follows: the air blower connected with the third inlet 4-11 guides air into the blanking pipe 4-1 through the third inlet 4-11, the air guided into the blanking pipe 4-1 is sprayed onto the spoiler 8-2, and the air is uniformly distributed on the air distribution cylinder 8-1 through the spoiler 8-2, so that the air passes through the air distribution plate 8-1 to a position far away from the second inlet 4-11 in the blanking pipe 4-1, the air distribution cylinder 8-1 is provided with a plurality of through holes in a penetrating mode, and the aperture of each through hole is 10mm-16mm, so that the flow field speed stability of the air quantity guided into the heating pipe 3 through the air inlet is guaranteed to be accelerated.
In one embodiment, the outer surface of the air distribution cylinder 8-1 is wrapped with a wire mesh, so that wood chips conveyed to the blanking pipe 4-1 are prevented from flowing back to the air blower.
In one embodiment, the spoiler 8-2 is divided into two sections from the central symmetrical axis position thereof, and is connected to the bottom position of the air distribution cylinder 8-1 through the connecting rods 8-21, respectively, and the two sections of the spoiler 8-2 are spaced apart from each other by a predetermined distance at the splicing end position thereof.
The working principle and the beneficial effects of the technical scheme are as follows: the spoiler 8-2 is divided into two petals from the central symmetrical axis position, so that the installation of the spoiler 8-2 is convenient, and the two petals of the spoiler 8-2 are reserved with a preset distance at the splicing end position, so that a part of inlet air is guided into the cylinder bottom of the air distribution cylinder 8-1 through the preset distance reserved at the splicing end, and the air supply of the air feeder is favorably and uniformly distributed in the air distribution cylinder 8-1.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. A wood chip fluidized bed boiler combustion system is characterized by comprising:
the device comprises a temporary storage bin (1), wherein the temporary storage bin (1) is arranged in a vertical structure, a first inlet (1-1) is formed in the upper end of the temporary storage bin (1), a conveying belt (1-3) is arranged on the first inlet (1-1), and a first outlet (1-2) is formed in the lower end of the temporary storage bin (1);
the conveying device (2) comprises a second inlet (2-1) and a second outlet (2-2), the second inlet (2-1) is matched and connected with the first outlet (1-2), the second outlet (2-2) is connected with a blanking air seal machine (2-3), and the second outlet (2-2) is connected with the inlet end of the blanking air seal machine (2-3);
the air supply device (4) comprises a discharging pipe (4-1), the discharging pipe (4-1) comprises a third inlet (4-11) and a third outlet (4-12), the third inlet (4-11) is connected with an air supply blower, and the outlet end of the discharging air seal machine (2-3) is connected to the position, close to the third inlet (4-11), of the side end of the discharging pipe (4-1) through a pipeline in a bypass mode;
the third inlet (4-11) is connected in the hearth of the fluidized bed boiler (6) in a penetrating way through a pipeline;
the blanking air seal device (2-3) is of an anti-blocking type, the blanking air seal device is of a small gap type, the gap is not more than 0.5mm, a circular structure is adopted, the length of a connecting pipeline between the outlet end of the blanking air seal device (2-3) and a blanking pipe (4-1) is not more than 1000mm, the normal operation pressure in a hearth of the fluidized bed boiler (6) is 2KPa, the air pressure of the air supply device (4) is required to be more than 5KPa of the pressure in the hearth of the fluidized bed boiler (6), and the air speed in the blanking pipe (4-1) is not less than 5 m/s;
the angle between the air feeder connected to the third inlet (4-11) and the blanking pipe (4-1) is not less than 120 degrees, the air feeding temperature of the air feeder is not lower than the secondary air temperature led into the blanking pipe (4-1) through the secondary air pipeline (7) by 20 ℃, and the vertical height of one end, close to the blanking pipe (4-1), of the secondary air pipeline (7) relative to the ground is higher than that of the third outlet (4-12) relative to the ground by more than 500 mm;
the cross section of the side end of the temporary storage bin (1) close to the first outlet (1-2) is of a bucket-shaped structure, a stirring device (5) is arranged in the temporary storage bin (1), the stirring device (5) comprises a stirring shaft (5-1) and stirring blades (5-2), the stirring shaft (5-1) is vertically arranged at the position of the central shaft of the temporary storage bin (1), the stirring blades (5-2) are arranged on the stirring shaft (5-1), the upper end of the temporary storage bin (1) is provided with a driving motor (5-3) matched with the stirring shaft (5-1) to rotate, the rotating output end of the driving motor (5-3) is connected with the stirring shaft (5-1) through a belt, a support frame (5-4) is arranged in the temporary storage bin (1), and the support frame (5-4) comprises a fixing ring (5-41), the stirring shaft (5-1) is provided with a stepped shaft which is matched with the fixing ring (5-41) for fixed connection, the stepped shaft is rotatably connected with the inner ring of the fixing ring (5-41), the outer ring of the fixing ring (5-41) is connected to the inner wall of the temporary storage bin (1) through a plurality of connecting rods (5-42), the stirring shaft (5-1) is concentrically arranged at the central position of the first outlet (1-2), the side end of the stirring shaft (5-1) is provided with a helical blade (5-5) at a position close to the first outlet (1-2), and the central line of the helical blade (5-5) is wound along a cylindrical spiral line taking the stirring shaft (5-1) as the center;
the outer diameter of the spiral blade (5-5) is equal to the inner diameter of the first outlet (1-2).
2. A wood chip fluidized bed boiler combustion system as claimed in claim 1, wherein the blanking pipe (4-1) is arranged in an inclined manner, the vertical height of the third inlet (4-11) relative to the ground is higher than the vertical height of the third outlet (4-12) relative to the ground, a secondary air pipeline (7) is connected to the side end of the blanking pipe (4-1), one end of the secondary air pipeline (7) is connected in the hearth of the fluidized bed boiler (6) in a penetrating manner, and the other end of the secondary air pipeline (7) is connected in a penetrating manner to the side end of the blanking pipe (4-1) near the second outlet (4-12).
3. A wood chips fluidized bed boiler combustion system according to claim 1, characterized in that the third inlet (4-11) is provided with an air distribution device (8), the air distribution device (8) comprising:
the air distribution barrel (8-1), a plurality of through holes are formed in the outer surface of the air distribution barrel (8-1) in a penetrating mode, the outer diameter of the air distribution barrel (8-1) is slightly smaller than the inner diameter of the third inlet (4-11), a clamping ring (8-3) is arranged on the outer wall of the air distribution barrel (8-1) close to the opening end of the air distribution barrel in a surrounding mode, the diameter of the clamping ring (8-3) is larger than the inner diameter of the third inlet (4-11), and the clamping ring (8-3) is clamped in a mating flange matched with the third inlet (4-11) in use;
the spoiler (8-2) is connected to the position of the center of the bottom of the air distribution cylinder (8-1) through a connecting rod (8-21), the cross section of the spoiler (8-2) is in a convex ellipsoid shape, the vertical end of the spoiler is connected to the position of the bottom of the air distribution cylinder (8-1) through the connecting rod (8-21), and the spherical end of the spoiler is close to the third inlet (4-11).
4. The combustion system of a wood chip fluidized bed boiler as claimed in claim 3, characterized in that the outer surface of the air distribution cylinder (8-1) is wrapped with a wire mesh.
5. A wood chips fluidized bed boiler combustion system as defined in claim 3, characterized in that said spoiler (8-2) is divided into two pieces from its central symmetrical axis position and is connected to the bottom position of the air distribution cylinder (8-1) through connecting rods (8-21), respectively, and a predetermined distance is left between the two pieces of said spoiler (8-2) at the splicing end position.
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| CN201811045870.5A CN109140429B (en) | 2018-09-07 | 2018-09-07 | Wood chip fluidized bed boiler combustion system |
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| CN104315504A (en) * | 2014-08-21 | 2015-01-28 | 中国华能集团清洁能源技术研究院有限公司 | A circulating fluidized bed boiler capable of inhibiting formation of a combustion high-temperature region and an inhibiting method |
| CN204478036U (en) * | 2014-12-20 | 2015-07-15 | 无锡东马锅炉有限公司 | The anti-blocking conveying device of coal channel under boiler |
| CN205155941U (en) * | 2015-10-20 | 2016-04-13 | 新会双水发电(B厂)有限公司 | Automatic extra bed material structure |
| CN205931924U (en) * | 2016-07-07 | 2017-02-08 | 兴化市热华能源有限公司 | Be applied to living beings feed bin conic section's not hard up wind structure |
| CN206430098U (en) * | 2017-01-26 | 2017-08-22 | 哈尔滨电站设备成套设计研究所有限公司 | Fluidized-bed combustion boiler give coal sealing device |
| CN107559814A (en) * | 2017-09-07 | 2018-01-09 | 杭州蓝禾新能源工程技术有限公司 | The bubbling and secondary cyclone combustion technology of wood chips burning fluid bed |
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