CN110285441B - Boiler system with waste heat collecting function - Google Patents
Boiler system with waste heat collecting function Download PDFInfo
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- CN110285441B CN110285441B CN201910606849.6A CN201910606849A CN110285441B CN 110285441 B CN110285441 B CN 110285441B CN 201910606849 A CN201910606849 A CN 201910606849A CN 110285441 B CN110285441 B CN 110285441B
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- 239000002918 waste heat Substances 0.000 title claims abstract description 15
- 239000003245 coal Substances 0.000 claims abstract description 114
- 239000000779 smoke Substances 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000005086 pumping Methods 0.000 claims abstract description 3
- 238000001914 filtration Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 238000002485 combustion reaction Methods 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000011010 flushing procedure Methods 0.000 claims description 12
- 238000005192 partition Methods 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 10
- 239000002699 waste material Substances 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 2
- 230000007423 decrease Effects 0.000 claims 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 8
- 239000003546 flue gas Substances 0.000 abstract description 8
- 239000000843 powder Substances 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000004804 winding Methods 0.000 description 13
- 238000003756 stirring Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000002817 coal dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
- F23K1/04—Heating fuel prior to delivery to combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/10—Intercepting solids by filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/008—Feeding devices for pulverulent fuel
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Air Supply (AREA)
Abstract
The invention relates to the field of boiler waste heat recovery, in particular to a boiler system with a waste heat collecting function, which comprises a boiler and an exhaust flue connected with a smoke outlet of the boiler through a second pipeline, the outer discharge flue is vertically arranged, the heat exchange device also comprises a heat exchange channel communicated with the upper end of the outer discharge flue through a first pipeline, the heat exchange channel vertically extends, a plurality of coal feeding channels for coal powder to pass through are arranged in the heat exchange channel, and the coal feeding channels are S-shaped, the upper end of the coal feeding channel extends upwards from one side wall of the heat exchange channel and is communicated with a discharge hole of a coal supply box for providing pulverized coal through a feeding pipe, the coal supply box is divided into a coal containing cavity and a heating cavity along the width direction of the coal supply box, the coal containing cavity is communicated with the heating cavity through an air duct, the heating cavity is communicated with the first pipeline through an air inlet pipeline, and the air inlet pipeline is provided with a smoke pump for pumping smoke on the first pipeline into the heating cavity. This boiler system can retrieve some heat in the flue gas that the boiler produced, improves thermal utilization efficiency.
Description
Technical Field
The invention relates to the field of boiler waste heat recovery, in particular to a boiler system with a waste heat collecting function.
Background
In the last decade, energy conservation work is further carried out due to energy shortage. Various novel advanced energy-saving furnaces are gradually improved, and the heat dissipation loss of the furnace body is obviously reduced after novel high-quality heat-insulating materials such as refractory fibers are adopted. The advanced combustion device is adopted to strengthen the combustion, the incomplete combustion amount is reduced, and the air-fuel ratio is also reasonable. However, due to the existence of design deviation of a hearth or the difference between the design coal type and the actual combustion coal type, the exhaust gas temperature of the boiler is too high, the exhaust gas carries more waste heat, and the exhaust loss is increased; the technology of reducing the heat loss of the exhaust gas and recovering the waste heat of the exhaust gas is still not rapidly developed. In order to further improve the heat efficiency of the furnace body and achieve the purposes of energy conservation and consumption reduction, the recovery of the waste heat of the flue gas is also an important energy-saving way; meanwhile, the boiler flue gas has certain corrosiveness, if the boiler flue gas is directly contacted with heat exchange equipment for heat exchange, the service life of the heat exchange equipment is reduced,
disclosure of Invention
The invention aims to provide a boiler system with a waste heat collecting function aiming at the defects of the prior art, which can recover part of heat in flue gas generated by a boiler and improve the utilization rate of fuel.
In order to solve the above problems, the present invention provides the following technical solutions:
a boiler system with a waste heat collecting function comprises a boiler and an outer exhaust flue connected with a smoke outlet of the boiler through a second pipeline, wherein the outer exhaust flue is vertically arranged, it is characterized by also comprising a heat exchange channel communicated with the upper end of the outer discharge flue through a first pipeline, the heat exchange channel extends vertically, a plurality of coal feeding channels for coal powder to pass through are arranged in the heat exchange channel, and the coal feeding channels are S-shaped, the upper end of the coal feeding channel extends upwards from one side wall of the heat exchange channel and is communicated with a discharge hole of a coal supply box for providing pulverized coal through a feeding pipe, the coal supply box is divided into a coal containing cavity and a heating cavity along the width direction of the coal supply box, the coal containing cavity is communicated with the heating cavity through an air duct, the heating cavity is communicated with the first pipeline through an air inlet pipeline, and the air inlet pipeline is provided with a smoke pump for pumping smoke on the first pipeline into the heating cavity.
Preferably, an inclined plate is arranged in the coal containing cavity, one end of the inclined plate close to the discharge port is lower, and the lower end of the inclined plate is aligned with the lower side of the discharge port.
Preferably, a heat exchange nozzle is arranged in the coal containing cavity and at a position close to the upper side of the coal containing cavity, the heat exchange nozzle is of a hollow structure, a plurality of air outlet holes communicated with the hollow structure are formed in the surface of the heat exchange nozzle, and one end of the air guide pipe, which is located in the coal containing cavity, is inserted into the hollow structure of the heat exchange nozzle.
Preferably, a plurality of partition plates are arranged in the feeding pipe and close to the coal walking channel, the partition plates divide the feeding pipe into guide material channels with the same number as the coal walking channel, the guide material channels are in one-to-one correspondence with the coal walking channel, a plurality of material shifting plates are arranged in the feeding pipe and between the partition plates and the discharge port, the material shifting plates are rotatably arranged in the feeding pipe through a rotating shaft, the rotating shaft is horizontally arranged and perpendicular to the flowing direction of the pulverized coal in the feeding pipe, and the material shifting plates are arranged at equal angles relative to the rotating shaft.
Preferably, a conveying pipeline is arranged on the outer side of the lower end of the heat exchange channel, the lower end of the coal walking channel extends out of the lower end of the heat exchange channel and into the conveying pipeline, one end, far away from the heat exchange channel, of the conveying pipeline is communicated with a combustion chamber of the boiler, and the height of the conveying pipeline is gradually reduced along the direction close to the combustion chamber.
Preferably, the coal conveying device further comprises an anti-blocking mechanism for preventing the coal conveying channel from being blocked. Prevent stifled mechanism wire rope and prevent stifled horizontal pole, set up two wire rope in every coal passageway of walking, two wire rope extend and set up respectively in the both sides along width direction of walking the coal passageway along the length direction of coal passageway along walking, are provided with many between two wire rope prevent stifled horizontal pole, many prevent the equidistant setting of stifled horizontal pole to prevent that the diameter of stifled horizontal pole is less than the width direction's of the cross section of coal passageway size.
Preferably, the upper end of the steel wire rope extends into the feeding pipe, and the lower end of the steel wire rope extends into the conveying pipeline. The conveying pipe and the conveying pipeline are internally provided with winding rollers for winding the steel wire rope, the number of the winding rollers in the conveying pipe and the number of the winding rollers in the conveying pipeline are equal to the number of the coal walking channels, and the outer side of the conveying pipe and the outer side of the conveying pipeline are respectively provided with a traction motor in transmission connection with the corresponding winding rollers.
Preferably, still including setting up the filtering mechanism in outer discharge flue, filtering mechanism is including setting up in outer discharge flue and a plurality of filter that set up from bottom to top, has evenly seted up a plurality of filtration holes on the filter, along the direction from bottom to top, and the size of the filtration hole on the different filter diminishes gradually.
Preferably, a smoke outlet pipeline for discharging smoke into the atmosphere is arranged at a position, close to the lower end, of the heat exchange channel, two backflushing pipes which are arranged oppositely are arranged above each filter plate, one end of each backflushing pipe is inserted into the outer exhaust flue and attached to the upper surface of the corresponding filter plate, the other end of each backflushing pipe is communicated with the smoke outlet pipeline through a supply pipeline, a supply pump is arranged on each supply pipeline, an air inlet of each supply pump is communicated with the smoke outlet pipeline, and an air outlet of each supply pump is communicated with the backflushing pipes.
Preferably, the waste collection mechanism is used for collecting solid particles generated by the filtering mechanism, the waste collection mechanism comprises a roller and a waste bin, the roller is rotatably arranged at the lower end of the outer exhaust flue, the waste bin is located right below the outer exhaust flue, the cross section of the outer exhaust flue is rectangular, the roller comprises two planes which are oppositely arranged on the side face of the roller, the distance between the two planes and the rotating axis of the roller is smaller than the diameter of the roller, two ends of the roller are rotatably fixed on two opposite side walls of the outer exhaust flue, the rotating axis of the roller is horizontally arranged, and the diameter of the roller is equal to or slightly smaller than the distance between the other two opposite side walls of the outer exhaust flue.
Compared with the prior art, the invention has the following beneficial effects:
1) the boiler system is provided with the heat exchange channel, and the coal passing channel is arranged in the heat exchange channel, so that heat in flue gas can be transferred to coal dust in the coal passing channel to heat the coal dust, on one hand, recovery of part of heat is realized, on the other hand, the combustion rate of the coal dust can be improved, and the boiler is more environment-friendly and energy-saving in use;
2) the boiler system is also provided with an anti-blocking mechanism for preventing the coal-feeding channel from being blocked, and the blockage of the coal-feeding channel can be effectively prevented by arranging a steel wire rope capable of moving back and forth in the coal-feeding channel and a cross rod arranged on the steel wire rope;
3) the outer smoke channel is also provided with a filtering mechanism, and fixed particles in the smoke can be filtered as much as possible through the filtering mechanism, so that the emission of the fixed particles to the atmosphere is reduced. The mechanism for collecting the solid particles is arranged below the outer discharge flue, so that the solid particles generated in the outer discharge flue can be collected in time, and the blockage is avoided, and the use of the whole boiler system is influenced.
Drawings
FIG. 1 is a first perspective view of the present invention;
FIG. 2 is a schematic perspective view of the present invention;
FIG. 3 is a schematic plan sectional view of the present invention;
FIG. 4 is an enlarged view taken at A in FIG. 3;
FIG. 5 is an enlarged view of FIG. 3 at B;
FIG. 6 is an enlarged view of FIG. 3 at C;
FIG. 7 is an enlarged view of FIG. 3 at D;
FIG. 8 is an enlarged view at E in FIG. 3;
FIG. 9 is an enlarged view at F of FIG. 3;
FIG. 10 is a partial perspective view of the first embodiment of the present invention;
FIG. 11 is a partial perspective view of the second embodiment of the present invention;
fig. 12 is a schematic partial perspective view of the third embodiment of the present invention.
Detailed Description
The following detailed description of specific embodiments of the present invention is made with reference to the accompanying drawings and examples:
referring to fig. 1 to 12, the boiler system with a waste heat collecting function includes a boiler 1, and an external exhaust flue 1a connected to a smoke outlet of the boiler 1 through a Y-shaped pipe 1b, wherein two outlets of the Y-shaped pipe 1b are respectively communicated with two sides of a lower end of the external exhaust flue 1 a.
Boiler system still includes the heat transfer passageway 3 through first pipeline 3a and the upper end intercommunication of arranging flue 1a outward, heat transfer passageway 3 is vertical to be extended be provided with a plurality of coal passageways 7 of walking that are used for the confession coal to pass through in the heat transfer passageway 3, when the coal passes through, because the flue gas in the heat transfer pipeline 3 has the heat, can heat and then can be to some thermal recycle walking the coal in the coal passageway 7. A smoke outlet pipeline 6 is arranged at the position, close to the lower end, of the heat exchange channel 3, and the smoke is finally discharged to the atmosphere through the smoke outlet pipeline 6.
The upper end of the coal feeding channel 7 is a coal feeding end, the coal feeding end extends out of the upper end of one side wall of the heat exchange channel 3, which is far away from the outer discharge flue 1a, and the part of the coal feeding channel 7, which is close to the coal feeding end, is inclined upwards. The coal feeding end is communicated with a coal supply box 4 for placing pulverized coal for combustion through a feeding pipe 4 a. The height of the coal supply box 4 is higher than the upper end of the coal walking channel 7.
The coal supply box 4 comprises a coal containing cavity 4h for containing coal and a heating cavity 4d for filling smoke, and the coal containing cavity 4h and the heating cavity 4d are separated by a partition plate. The coal powder in the coal containing cavity 4h can be supplied at a constant speed by an external feeder or by other methods in the prior art. And an inclined plate 4i which inclines downwards along the direction close to the feeding pipe 4a is arranged in the coal containing cavity 4h, a discharge hole is arranged at the position of the coal containing cavity 4h corresponding to the feeding pipe 4a, and the lower end of the inclined plate 4i is aligned with the lower end of the discharge hole, so that the coal powder falling onto the inclined plate 4i can automatically enter the feeding pipe 4a and enter the coal feeding channel 7.
The coal containing cavity 4h is internally provided with a heat exchange spray nozzle 4c at a position close to the upper part, the heat exchange spray nozzle 4c is of a hollow structure, a plurality of air outlet holes communicated with the hollow structure are formed in the surface of the heat exchange spray nozzle 4c, and an air guide pipe 4k communicated with the hollow structure and the heating cavity 4d is further arranged on the heat exchange spray nozzle 4 c. Be provided with air inlet pipeline 4m between first pipeline 3a and the heating chamber 4d, air inlet pipeline 4 m's one end and first pipeline 3a intercommunication, air inlet pipeline 4 m's the other end and heating chamber 4d intercommunication are provided with aspiration pump 4r on air inlet pipeline 4m, aspiration pump 4r can be with through the partly flue gas suction of first pipeline 3a to heating chamber 4d to from heating chamber 4d enter into flourishing coal cavity 4h through air duct 4k and carry out the heating of certain degree with the buggy in the flourishing coal cavity 4 h. And, through spouting gas into flourishing coal cavity 4, can promote the buggy to get into in feed pipe 4 a.
A conveying pipeline 8 is arranged on the outer side of the lower end of the heat exchange channel 3, the lower end of the coal walking channel 7 extends out of the lower end of the heat exchange channel 3 and extends into the conveying pipeline 8, and pulverized coal sent out from the coal supply box 4 enters the conveying pipeline 8 through the feeding pipe 4a and the heat exchange channel 3 and is heated in the coal supply box 4 and the heat exchange channel 3. One end of the conveying pipeline 8, which is far away from the heat exchange channel 3, is connected with a combustion chamber of the boiler 1 so as to send the pulverized coal into the combustion chamber. In order to facilitate the entry of the pulverized coal into the combustion chamber, the conveying duct 8 may be gradually inclined downwards in the flow direction of the pulverized coal. Likewise, a suction pump 8b may be provided on the conveying pipe 8 for driving the pulverized coal in the flow direction.
A plurality of partition plates are arranged in the feeding pipe 4a and close to the coal walking channel 7, the feeding pipe 4a is divided into guide material channels 4b with the same number as the coal walking channel 7 by the partition plates, and the guide material channels 4b are in one-to-one correspondence with the coal walking channel 7. A plurality of material stirring plates 5c are arranged in the feeding pipe 4a and between the partition plate and the discharge port, the plurality of material stirring plates 5c are rotatably arranged in the feeding pipe 4a through a rotating shaft 5a, the rotating shaft 5a is horizontally arranged and perpendicular to the flowing direction of the pulverized coal in the feeding pipe 4a, the plurality of material stirring plates 5c are arranged at equal angles relative to the rotating shaft 5a, and the radial size of the material stirring plates 5c is such that when the material stirring plates 5c are perpendicular to the upper wall and the lower wall of the feeding pipe 4a, one end of the material stirring plate 5c far away from the rotating shaft 5a is close to the upper wall or the lower wall of the feeding pipe 4 a. The two ends of the material-poking plate 5c in the axial direction are close to the side walls of the corresponding side of the feeding pipe 4 a. And a feeding motor 5b in transmission connection with the rotating shaft 5a is arranged outside the feeding pipe 4, and the pulverized coal can be driven to enter the guide material channel 4b by controlling the rotation of the feeding motor 5 b.
The boiler system further comprises an anti-blocking mechanism for preventing the coal passageway 7 from being blocked. Prevent stifled mechanism wire rope 7b and prevent stifled horizontal pole 7a, set up two wire rope 7b in every coal passageway 7 of walking, two wire rope 7b extend and set up respectively in the both sides of walking along the width direction of coal passageway 7 along the length direction of coal passageway 7, are provided with many between two wire rope 7b prevent stifled horizontal pole 7a, many prevent the equidistant setting of stifled horizontal pole 7 to the diameter of preventing stifled horizontal pole 7 is far less than the width direction's of the cross section of coal passageway 7 size, can remove through the buggy that prevents stifled horizontal pole 7a pulling stifled in coal passageway 7 when making a round trip to stimulate wire rope 7b, plays the effect of mediation.
The upper end of the steel wire rope 7b extends into the feeding pipe 4a, and the lower end extends into the conveying pipeline 8. The conveying pipe 4a and the conveying pipeline 8 are internally provided with winding rollers 7c for winding the steel wire rope 7b, the number of the winding rollers 7c in the conveying pipe 4a and the number of the winding rollers 7c in the conveying pipeline 8 are equal to the number of the coal walking channels 7, namely, two ends of each coal walking channel 7 are respectively provided with one winding roller 7c, the end part of the steel wire rope 7b is wound on the corresponding winding roller 7c, and the anti-blocking cross rod 7a can be driven to move back and forth by driving the positive and negative rotation of the winding rollers 7 c. The take-up roll 7c located within the feed tube 4a may be supported on a partition or on a side wall of the feed tube 4a and the take-up roll 7c located within the delivery duct 8 may be supported on a side wall of the delivery duct 8. Traction motors 8a in transmission connection with corresponding winding rollers 7c are arranged on the outer side of the feeding pipe 4a and the outer side of the conveying pipeline 8 respectively, and control over the anti-blocking cross rod 7a can be achieved by controlling the traction motors 8 a.
The boiler system further comprises a filtering mechanism arranged in the outer flue 1 a. The filtering mechanism comprises a plurality of filtering plates 1c which are arranged in an outer smoke channel 1a from bottom to top, a plurality of filtering holes are uniformly formed in the filtering plates 1c, the sizes of the filtering holes in different filtering plates 1c are gradually reduced along the direction from bottom to top, so that solid particles in smoke can be filtered step by step, and the solid particles in the atmosphere are further reduced and discharged. Preferably, the lowermost filter plate 1c is located above the junction of said Y-tube 1b with the outer discharge flue 1 a.
In order to clean solid particles falling above the filter plates 1c, two counter-flushing pipes 1d which are oppositely arranged are arranged above each filter plate 1c, one end of each counter-flushing pipe 1d is inserted into the outer exhaust flue 1a and is attached to the upper surface of the corresponding filter plate 1c, the other end of each counter-flushing pipe 1d is communicated with the smoke outlet pipeline 6 through the supply pipeline 1n, a supply pump 1m is arranged on each supply pipeline 1n, the air inlet of each supply pump 1m is communicated with the smoke outlet pipeline 6, the air outlet of each air outlet is communicated with the corresponding counter-flushing pipe 1d, air is supplied to the counter-flushing pipes 1d through the supply pumps 1m, and the counter-flushing pipes 1d can blow off the solid particles falling on the filter plates 1 c. Preferably, the air outlet nozzle 1k of the backflushing pipe 1d, which is located in the outer discharge flue 1a, is flat, so as to achieve a better backflushing effect. Each of the back-flushing pipes 1d is provided with a check valve 1r, and the check valve 1r makes the back-flushing pipe 1d conduct in one direction toward the direction of the intake air of the outer discharge flue 1 a.
The boiler system also includes a waste collection mechanism to collect solid particles produced by the filtering mechanism. The waste collecting mechanism comprises a roller 2 which is rotatably arranged at the lower end of the outer discharge flue 1a and a waste bin 2b which is positioned right below the outer discharge flue 1a, and the section of the outer discharge flue 1a is rectangular. The roller 2 comprises two planes which are oppositely arranged on the cylindrical surface of the roller 2, the distance between the two planes and the center of the roller 2 is smaller than the diameter of the roller 2, two ends of the roller 2 are rotatably fixed on two opposite side walls of the outer discharge flue 1a, the rotation axis of the roller 2 is horizontally arranged, and the diameter of the roller 2 is equal to or slightly smaller than the distance between the other two opposite side walls of the outer discharge flue 1a, so that when the cylindrical surface of the roller 2 is matched with the other two opposite side walls, the outer discharge flue 1a can be blocked, and the smoke is prevented from running out from the lower end of the outer discharge flue 1 a. When fixed particles in the outer discharge flue 1a need to be removed, the roller 2 rotates 90 degrees, two planes on the roller 2 are matched with the other two opposite side walls, and a larger gap is formed between the two planes and the opposite side walls, so that the solid particles can fall off from the front of the gap. Preferably, an opening and closing motor 2a in transmission connection with the rollers 2 is arranged on the outer side of the outer discharge flue 1a, and the opening or closing of the lower end of the outer discharge flue 1a can be realized by controlling the rotation of the opening and closing motor 2 a. In order to ensure the tightness of the lower end of the outer discharge flue 1a, a rubber pad 2c is arranged on the cylindrical surface of the roller 2.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (5)
1. A boiler system with a waste heat collecting function comprises a boiler, an outer exhaust flue connected with a smoke outlet of the boiler through a second pipeline, and a heat exchange channel which is vertically arranged in the outer exhaust flue and is characterized by also comprising a heat exchange channel with the upper end communicated with the upper end of the outer exhaust flue through a first pipeline, wherein the heat exchange channel is vertically extended, a plurality of coal walking channels for pulverized coal to pass through are arranged in the heat exchange channel, the coal walking channels are S-shaped, the upper end of the coal walking channels obliquely extends out of one side wall of the heat exchange channel and is communicated with a discharge hole of a coal supply box for providing pulverized coal through a feeding pipe, the coal supply box is divided into a coal containing cavity and a heating cavity along the width direction of the coal supply box, the coal containing cavity is communicated with the heating cavity through an air duct, the heating cavity is communicated with the first pipeline through an air inlet pipeline, and the air inlet pipeline is provided with a smoke pump for pumping smoke on the first pipeline, the coal conveying device is characterized in that an inclined plate is arranged in the coal containing cavity, one end of the inclined plate close to the discharge port is lower, the lower end of the inclined plate is aligned with the lower side of the discharge port, a heat exchange spray head is arranged in the coal containing cavity and close to the upper part of the coal containing cavity, the heat exchange spray head is of a hollow structure, a plurality of air outlet holes communicated with the hollow structure are formed in the surface of the heat exchange spray head, one end of the air guide pipe, which is located in the coal containing cavity, is inserted into the hollow structure of the heat exchange spray head, a plurality of partition plates are arranged in the feed pipe and close to the coal conveying channel, the feed pipe is divided into guide material channels with the same number as the coal conveying channel by the partition plates, the guide material channels are in one-to-one correspondence with the coal conveying channel, a plurality of poking plates are arranged in the feed pipe and between the partition plates and the discharge port, the boiler system comprises a plurality of kick-off plates, a boiler body, a plurality of conveying pipes, a plurality of feed pipes, a plurality of transfer plates and a boiler body, wherein the plurality of kick-off plates are arranged at equal angles relative to a rotating shaft, the boiler body further comprises an anti-blocking mechanism for preventing a coal walking channel from being blocked, the anti-blocking mechanism comprises a steel wire rope and an anti-blocking cross rod, two steel wire ropes are arranged in each coal walking channel, extend along the length direction of the coal walking channel and are respectively arranged at two sides of the coal walking channel along the width direction, a plurality of anti-blocking cross rods are arranged between the two steel wire ropes and are arranged at equal intervals, the diameter of each anti-blocking cross rod is smaller than the size of the cross section of the coal walking channel in the width direction, the upper ends of the steel wire ropes extend into the feed pipes, the lower ends of the steel wire ropes extend into the conveying pipes, wind-up, and traction motors in transmission connection with the corresponding wind-up rolls are respectively arranged on the outer side of the feeding pipe and the outer side of the conveying pipeline.
2. The boiler system with the waste heat collecting function according to claim 1, wherein a conveying pipeline is arranged outside the lower end of the heat exchange channel, the lower end of the coal walking channel extends out of the lower end of the heat exchange channel and into the conveying pipeline, one end of the conveying pipeline, which is far away from the heat exchange channel, is communicated with a combustion chamber of the boiler, and the height of the conveying pipeline is gradually reduced along the direction close to the combustion chamber.
3. The boiler system with the function of collecting the residual heat according to any one of claims 1 to 2, further comprising a filtering mechanism disposed in the outer flue, wherein the filtering mechanism comprises a plurality of filtering plates disposed in the outer flue from bottom to top, the filtering plates are uniformly provided with a plurality of filtering holes, and the size of the filtering holes in different filtering plates gradually decreases along the direction from bottom to top.
4. The boiler system with residual heat collecting function according to claim 3, wherein a smoke outlet pipe for discharging smoke into the atmosphere is provided near the lower end of the heat exchange channel, two opposed back-flushing pipes are provided above each filter plate, one end of each back-flushing pipe is inserted into the exhaust flue and attached to the upper surface of the corresponding filter plate, the other end of each back-flushing pipe is communicated with the smoke outlet pipe through a supply pipe, a supply pump is provided on the supply pipe, an air inlet of the supply pump is communicated with the smoke outlet pipe, and an air outlet of the supply pump is communicated with the back-flushing pipe.
5. The boiler system with the waste heat collecting function according to claim 4, further comprising a waste collecting mechanism for collecting solid particles generated by the filtering mechanism, wherein the waste collecting mechanism comprises a roller rotatably arranged at the lower end of the outer exhaust flue and a waste bin positioned right below the outer exhaust flue, the cross section of the outer exhaust flue is rectangular, the roller comprises two planes oppositely arranged on the side surface of the roller, the distance between the two planes and the rotation axis of the roller is smaller than the diameter of the roller, two ends of the roller are rotatably fixed on two opposite side walls of the outer exhaust flue, the rotation axis of the roller is horizontally arranged, and the diameter of the roller is equal to or slightly smaller than the distance between the other two opposite side walls of the outer exhaust flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910606849.6A CN110285441B (en) | 2019-07-06 | 2019-07-06 | Boiler system with waste heat collecting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910606849.6A CN110285441B (en) | 2019-07-06 | 2019-07-06 | Boiler system with waste heat collecting function |
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| CN114166041B (en) * | 2021-11-05 | 2023-11-17 | 无锡全邦能源科技有限公司 | High-efficiency high-performance steam flue gas heater |
| CN115076668B (en) * | 2022-07-27 | 2023-06-20 | 沂水蓝天节能设备有限公司 | Waste heat utilization device for boiler combustion waste |
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| CN2620186Y (en) * | 2003-05-21 | 2004-06-09 | 史学家 | Device for drying raw coal by boiler smoke |
| JP2010002079A (en) * | 2008-06-18 | 2010-01-07 | Mitsubishi Heavy Ind Ltd | Boiler and control method of boiler |
| CN202040826U (en) * | 2011-03-29 | 2011-11-16 | 魏大山 | Heat-storage type coal power online heater |
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