CN115950297B - Boiler flue gas waste heat circulation absorption equipment - Google Patents
Boiler flue gas waste heat circulation absorption equipment Download PDFInfo
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- CN115950297B CN115950297B CN202211735209.3A CN202211735209A CN115950297B CN 115950297 B CN115950297 B CN 115950297B CN 202211735209 A CN202211735209 A CN 202211735209A CN 115950297 B CN115950297 B CN 115950297B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The invention relates to the field of waste heat utilization devices, in particular to a boiler flue gas waste heat circulating and absorbing device. The equipment comprises a rotary drum, an inner wind sensing ring, an outer wind sensing ring and a cleaning structure, wherein the rotary drum can slide back and forth and rotate, a waste heat exchange drum capable of sliding back and forth is arranged in the rotary drum, a vent hole and a chute are formed in the inner wind sensing ring, the cleaning structure comprises a plurality of scraping rod pieces, a dust removing gap is formed between the adjacent scraping rod pieces, and the cleaning structure is arranged at a locking position and an unlocking position on the scraping rod pieces. The forced change of the inner wind sensing ring is enabled to reach a preset value by the smoke exhausted by the boiler, the waste heat exchange cylinder drives the scraping rod piece and the rotary cylinder to move relatively to the unlocking position, the inner wind sensing ring enters a dust removing gap, the rotary cylinder is driven by the fan blades to drive the scraping rod piece to rotate so as to remove dust on the waste heat exchange cylinder, automatic removal of smoke dust on the waste heat exchange cylinder is achieved, the heat exchange efficiency of the waste heat exchange cylinder is kept at a higher level as a whole, and accordingly the waste heat absorption efficiency of the boiler smoke is guaranteed to be at a higher value.
Description
Technical Field
The invention relates to the field of waste heat utilization devices, in particular to a boiler flue gas waste heat circulating and absorbing device.
Background
Industrial boilers are common thermodynamic equipment, and generally all industrial boilers adopt coal as combustion raw materials for generating electricity or supplying gas, and coal in the prior art can produce a lot of waste smoke and carry a lot of waste heat when being combusted in the boilers, and heat loss can be caused by directly discharging the smoke of the boilers, so that energy waste is caused.
Common boiler flue gas waste heat absorption equipment in the prior art is used for heating a heat exchange medium in a way of isolating heat conduction materials for waste heat exchange. Because the waste gas contains a large amount of smoke dust to form smoke gas, after the equipment works for a period of time, a large amount of coal dust is attached to the heat conducting material of the equipment to prevent the efficiency of heat exchange of waste heat in the boiler smoke gas, so that the waste heat absorption efficiency of the boiler smoke gas is reduced.
Disclosure of Invention
The invention provides a boiler flue gas waste heat circulating and absorbing device, which aims to solve the problem of low efficiency of absorbing the boiler flue gas waste heat.
The invention adopts the following technical scheme: the utility model provides a boiler flue gas waste heat circulation absorption equipment, includes the support of establishing in boiler the place ahead, still includes support, flue gas transport structure, heat transfer medium transport structure, a plurality of internal sense wind ring, a plurality of exogenous wind ring and clean structure.
The flue gas conveying structure comprises a rotary drum arranged front and back. The rotary drum can slide back and forth and is rotatably arranged on the boiler shell. The flue gas conveying structure is configured to exchange waste heat when boiler flue gas passes through the rotary drum. The heat exchange medium conveying structure comprises a waste heat exchange cylinder which is arranged front and back. The waste heat exchange cylinder is coaxially and slidably arranged in the rotary cylinder back and forth. The heat exchange medium conveying structure is configured to circulate the heat capacity carrier through the waste heat exchange cylinder, and when the flue gas passes through the rotary cylinder, waste heat in the flue gas is transferred to the heat exchange medium through the waste heat exchange cylinder.
The plurality of inner wind sensing rings are uniformly distributed along the length direction of the waste heat exchange cylinder. The inner wind sensing ring is sleeved and fixed on the outer side wall of the residual heat exchange cylinder. The inner wind sensing ring is provided with a plurality of ventilation holes. The inner wind sensing ring is provided with a chute. The chute is a through groove which is arranged along the radial direction of the waste heat exchange cylinder, and the chute penetrates through the peripheral wall surface of the inner wind sensing ring. The outer induction rings are uniformly distributed along the axial direction of the rotary drum and fixedly connected to the inner peripheral wall of the rotary drum. The cleaning structure comprises a plurality of scraping rod pieces which are uniformly distributed along the axial direction of the waste heat exchange cylinder and can slide along the axial direction of the waste heat exchange cylinder, and a dust removing gap is formed between two adjacent scraping rod pieces. The cleaning structure is provided with a corresponding locking position and an unlocking position before and after the scraping rod piece slides, when the cleaning structure is positioned at the locking position, the scraping rod piece is positioned in the sliding groove and limits the rotation of the rotary drum, and when the cleaning structure is positioned at the unlocking position, the inner wind sensing ring is positioned in the dust removing gap so as to enable the rotary drum to rotate.
Further, the cleaning structure further comprises an inner spring, an outer spring and fan blades. The inner spring is arranged between the waste heat exchange cylinder and the bracket. The outer spring is arranged between the rotary drum and the bracket. The fan blades are spirally distributed on the inner peripheral wall of the rotary drum so as to provide rotating force for the rotary drum when smoke passes through the rotary drum. The size of the dust removing gap is adapted to the thickness of the inner wind sensing ring.
Further, the scraping rod piece comprises a first scraping rod and two second scraping rods, the two second scraping rods are respectively connected to two ends of the first scraping rod, so that the scraping rod piece is approximately concave, the first scraping rods are axially arranged along the waste heat exchange cylinder and are abutted to the peripheral wall surface of the waste heat exchange cylinder, one ends, far away from the first scraping rods, of the second scraping rods are abutted to the rotating cylinder, and two adjacent second scraping rods on different scraping rods form dust removing gaps.
Further, the boiler flue gas waste heat circulating and absorbing device further comprises a re-cleaning structure. The re-cleaning structure comprises a synchronizing ring, a regulating ring and a transmission piece. The synchronous ring is provided with a first notch, the regulating ring is provided with a second notch, and when the first notch, the second notch and the sliding groove axially overlap along the waste heat exchange cylinder, the cleaning structure is in an unlocking position. The synchronous ring and the scraping rod piece synchronously rotate, and the transmission piece enables the synchronous ring to rotate at N times of the rotation speed of the regulating ring, wherein N is a positive integer.
Further, the clearing structure further comprises a synchronous groove, an annular groove and a mounting groove. The synchronous groove is arranged on the first scraping rod in a front-back mode, and the opening of the synchronous groove faces the waste heat exchange cylinder. The annular groove is arranged on the peripheral wall of the waste heat exchange cylinder. The synchronizing ring is rotatably mounted in the annular groove. The synchronizing ring is connected with a matching rod. The matching rod is fixed on the synchronous ring along the front-back direction. The matching rod is slidably arranged in the synchronous groove. The first notch is located at the mating lever. The mounting groove is annular, is arranged at the joint of the inner induced air ring and the waste heat exchange cylinder, and the opening faces the annular groove. The regulating ring is arranged between the inner wind sensing ring and the synchronizing ring and is rotatably arranged in the mounting groove. The transmission piece is arranged on the regulating ring and is positioned between the synchronous ring and the mounting groove.
Further, the transmission member is a plurality of rollers. The plurality of rollers are uniformly distributed along the circumferential direction of the regulating ring. The rollers are mounted on the adjusting ring in a radially rotatable manner about the adjusting ring. The diameter of the roller is larger than the thickness of the regulating ring, and the roller is in butt joint and friction fit with the synchronous ring and the bottom surface of the mounting groove.
Further, an air inlet cylinder is arranged on the boiler. The air inlet cylinder is coaxially arranged at the rear end of the rotary drum. The rear end of the air inlet cylinder is connected to the outer wall of the boiler. The front end of the air inlet cylinder is rotatably connected with the rear end of the rotary drum in a sealing way, and the air inlet cylinder and the rotary drum can slide back and forth relatively. The bracket is provided with an exhaust funnel. The exhaust pipe is coaxially arranged at the front end of the rotary drum. The front end of the exhaust tube is fixed on the bracket. The rear end of the exhaust tube is rotatably connected with the front end of the rotary drum in a sealing way, and the exhaust tube and the rotary drum can slide back and forth relatively.
Further, the heat exchange medium conveying structure further comprises a feeding pipe and a discharging pipe. The inlet pipe is arranged in the air inlet cylinder and is positioned at the rear end of the waste heat exchange cylinder, the front end of the inlet pipe is arranged along the axis of the air inlet cylinder, and the rear end of the inlet pipe outwards penetrates through the air inlet cylinder. The front end of the feed pipe can slide back and forth and is connected with the rear end of the residual heat exchange cylinder in a sealing way. The discharging pipe is arranged in the air inlet cylinder and is positioned at the front end of the waste heat exchange cylinder, the rear end of the discharging pipe is arranged along the axis of the waste heat exchange cylinder, and the front end of the discharging pipe outwards penetrates through the air outlet cylinder. The rear end of the discharging pipe can slide back and forth and is connected with the front end of the residual heat exchange tube in a sealing way.
Further, a connecting rod is arranged between the first scraping rod and the rotary drum. The connecting rod is arranged along the radial direction of the rotary drum, one end of the connecting rod is fixed on the external wind ring, and the other end of the connecting rod is fixed on the first scraping rod.
Further, the front end of the exhaust funnel is connected with tail gas purifying treatment equipment. The tail gas purifying treatment equipment is fixed on the bracket.
The beneficial effects of the invention are as follows: when the smoke exhausted by the boiler enables the stress change of the inner wind sensing ring to reach a preset value, so that the waste heat exchange cylinder and the rotary drum relatively move, the inner wind sensing ring is driven to move to the unlocking position, the inner wind sensing ring enters a dust removing gap, the rotary drum is driven by the fan blade to drive the scraping member to rotate so as to remove dust from the waste heat exchange cylinder and the inner wind sensing ring, automatic removal of smoke dust on the waste heat exchange cylinder is realized, the heat exchange efficiency of the waste heat exchange cylinder is kept at a higher level as a whole, and therefore, the smoke waste heat absorption efficiency of the boiler is ensured to be at a higher value.
Further, when the rotary drum drives the scraping rod piece to rotate, the first scraping rod drives the synchronous ring to synchronously rotate through the matching rod. The synchronous ring rotates and drives the roller on the regulating ring to rotate, the rotating speed ratio of the synchronous ring to the regulating ring is two to one through the use of the roller, and the scraping rod piece clears smoke dust on the waste heat exchange cylinder twice, so that the surface of the waste heat exchange cylinder is cleaner, and the heat conduction efficiency of the waste heat exchange cylinder is further improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of a boiler flue gas waste heat recycling and absorbing device according to an embodiment of the present invention;
FIG. 2 is an exploded view of the boiler flue gas waste heat recycling and absorbing device of FIG. 1;
FIG. 3 is a schematic view of the drum of FIG. 1;
FIG. 4 is an enlarged view of FIG. 3 at A;
FIG. 5 is a schematic view of the configuration of the heat exchange cartridge, synchronizer ring, and control ring of FIG. 1;
FIG. 6 is an enlarged view at B in FIG. 5;
FIG. 7 is an enlarged view at C in FIG. 5;
FIG. 8 is a schematic view of the control ring of FIG. 1;
FIG. 9 is a schematic diagram of the synchronizer ring of FIG. 1;
FIG. 10 is a schematic view of the construction of the scraper bar, inner wind sensing ring and waste heat exchange cartridge of FIG. 1;
fig. 11 is an enlarged view of D in fig. 10;
FIG. 12 is a state diagram of the wiper member and inner wind ring of FIG. 11 in normal operation;
FIG. 13 is a view of the inner wind sensing ring of FIG. 11 after it is blocked by smoke and the scraper bar is cleaned of smoke;
in the figure: 101. a bracket; 102. a boiler; 103. tail gas purifying treatment equipment; 11. an air inlet cylinder; 12. an exhaust pipe; 13. a feed pipe; 14. a discharge pipe; 2. a waste heat exchange tube; 21. an inner wind sensing ring; 22. a vent hole; 23. a chute; 3. a rotating drum; 31. an exogenous wind ring; 32. a connecting rod; 41. an inner spring; 42. an outer spring; 43. a fan blade; 44. a scraper bar; 441. a dust removal gap; 442. a first scraper bar; 443. a second scraper bar; 51. a synchronization groove; 52. an annular groove; 53. a synchronizing ring; 531. a first notch; 532. a mating lever; 54. a mounting groove; 55. a regulatory ring; 551. a second notch; 56. and (3) a roller.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An embodiment of a boiler flue gas waste heat recycling and absorbing device of the present invention is shown in fig. 1 to 13: the utility model provides a boiler 102 flue gas waste heat circulation absorption equipment, includes support 101, flue gas transport structure, heat transfer medium transport structure, a plurality of internal sense wind ring 21, a plurality of external sense wind ring 31 and clean structure. The rack 101 is provided in front of the boiler 102. The flue gas conveying structure comprises a rotary drum 3 arranged front and back. The drum 3 is slidably and rotatably provided to the housing of the boiler 102. The flue gas conveying structure is configured to exchange waste heat of flue gas of the boiler 102 when the flue gas passes through the rotary drum 3. The heat exchange medium conveying structure comprises a waste heat exchange cylinder 2 arranged front and back. The waste heat exchange tube 2 is coaxially provided in the drum 3 so as to be slidable back and forth. The heat exchange medium conveying structure is configured to circulate the heat capacity carrier through the waste heat exchange cylinder 2, and when the flue gas passes through the rotary cylinder 3, waste heat in the flue gas is transferred to the heat exchange medium through the waste heat exchange cylinder 2. The plurality of inner wind sensing rings 21 are uniformly distributed along the length direction of the waste heat exchange cylinder 2. The inner wind sensing ring 21 is sleeved and fixed on the outer side wall of the waste heat exchange cylinder 2. The inner wind sensing ring 21 is provided with a plurality of ventilation holes 22. The inner wind sensing ring 21 is provided with a chute 23. The chute 23 is a through groove provided along the radial direction of the waste heat exchange tube 2, and the chute 23 penetrates the outer peripheral wall surface of the inner wind sensing ring 21. A plurality of outer wind-induced rings 31 are uniformly distributed along the axial direction of the rotary drum 3 and fixedly connected to the inner peripheral wall of the rotary drum 3.
The cleaning structure comprises a plurality of scraping bar members 44 which are uniformly distributed along the axial direction of the waste heat exchange tube 2 and can slide along the axial direction of the waste heat exchange tube 2, and the scraping bar members 44 are connected to the rotary tube 3. A dust removing gap 441 is formed between two adjacent scraper bar members 44. The cleaning structure has a corresponding locking position and unlocking position before and after the scraping rod piece 44 slides, and in the locking position, the scraping rod piece 44 is positioned in the chute 23 and limits the rotation of the rotary drum 3, and in the unlocking position, the inner wind sensing ring 21 is positioned in the dust removing gap 441 so as to enable the rotary drum 3 to rotate. When the smoke exhausted by the boiler 102 makes the stress change of the inner wind sensing ring 21 reach a preset value to enable the waste heat exchange cylinder 2 and the rotary drum 3 to relatively move, and drives the scraping rod piece 44 to move to the unlocking position, the inner wind sensing ring 21 enters the dust removing gap 441, and the rotary drum 3 drives the scraping rod piece 44 to rotate under the driving of the fan blades 43 to remove dust from the waste heat exchange cylinder 2 and the inner wind sensing ring 21, so that automatic removal of smoke dust on the waste heat exchange cylinder 2 is realized, the heat exchange efficiency of the waste heat exchange cylinder 2 is kept at a higher level as a whole, and the smoke waste heat absorption efficiency of the boiler 102 is ensured to be at a higher value.
In this embodiment, the cleaning structure further comprises an inner spring 41, an outer spring 42 and a fan blade 43. The inner spring 41 is provided between the waste heat exchange tube 2 and the bracket 101. The outer spring 42 is provided between the drum 3 and the bracket 101. The fan blades 43 are spirally distributed on the inner peripheral wall of the drum 3 to provide rotational force to the drum 3 when the smoke passes through the drum 3. The dust removing gap 441 is sized to fit the thickness of the inner wind sensing ring 21 for scraping off the dust attached to the ventilation holes 22.
In the present embodiment, the scraping rod 44 includes a first scraping rod 442 and two second scraping rods 443, the two second scraping rods 443 are respectively connected to two ends of the first scraping rod 442, so that the scraping rod 44 is approximately concave, the first scraping rod 442 is disposed along the axial direction of the heat exchange tube 2 and abuts against the peripheral wall surface of the heat exchange tube 2, one end of the second scraping rod 443 away from the first scraping rod 442 abuts against the drum 3, and two adjacent second scraping rods 443 on different scraping rod 44 form a dust removing gap 441. When the dust removal gap 441 corresponds exactly to the inner wind sensing ring 21, the cleaning structure is in the unlocking position, and when the first scraper bar 442 moves to the chute 23 and restricts the rotation of the drum 3, the cleaning structure is in the locking position.
In this embodiment, a device for recycling and absorbing waste heat of flue gas in the boiler 102 further includes a re-cleaning structure. The re-clearing structure comprises a synchronizing ring 53, a regulating ring 55 and a transmission member. The synchronizing ring 53 is provided with a first notch 531, the regulating ring 55 is provided with a second notch 551, and when the first notch 531, the second notch 551 and the chute 23 axially overlap along the heat exchange tube 2, the cleaning structure is in the unlocking position. The synchronizing ring 53 rotates synchronously with the scraping rod member 44, and the transmission member causes the synchronizing ring 53 to rotate at N times the rotational speed of the regulating ring 55, where N is a positive integer, for making the number of rotations of the drum 3 at the unlocking position greater than one, so that the cleaning structure cleans the inner wind sensing ring 21 and the smoke dust on the surface of the waste heat exchange drum 2 multiple times.
In this embodiment, the skimming structure further includes a synchronization groove 51, an annular groove 52, and a mounting groove 54. The synchronizing grooves 51 are provided on the first scraper 442 in tandem, and the synchronizing grooves 51 open toward the waste heat exchange tube 2. An annular groove 52 is provided on the outer peripheral wall of the heat exchange tube 2. A synchronizing ring 53 is rotatably mounted in the annular groove 52. A mating lever 532 is connected to the synchronizing ring 53. The fitting lever 532 is fixed to the synchronizing ring 53 in a front-rear direction. The engagement lever 532 is slidably mounted in the synchronizing slot 51. The first notch 531 is at the mating lever 532. The mounting groove 54 is annular, is provided at the junction of the inner wind sensing ring 21 and the waste heat exchange tube 2, and opens toward the annular groove 52. The regulation ring 55 is provided between the inner induced air ring 21 and the synchronizing ring 53, and is rotatably provided in the mounting groove 54. The transmission member is provided on the regulating ring 55 between the synchronizing ring 53 and the mounting groove 54. The use of annular groove 52 and mounting groove 54 allows the cleaning structure to more snugly abut the inner wind sensing ring 21 and the waste heat exchange cartridge 2 surface.
In this embodiment, the driving member is a plurality of rollers 56. The plurality of rollers 56 are circumferentially distributed along the adjustment ring 55. The rollers 56 are mounted on the adjusting ring 55 so as to be rotatable radially about the adjusting ring 55. The diameter of the roller 56 is larger than the thickness of the regulating ring 55, and the roller is in abutting and friction fit with the synchronous ring 53 and the bottom surface of the mounting groove 54. The roller 56 makes the rotation speed of the synchronizing ring 53 twice as high as that of the regulating ring 55, so that after the rotating drum 3 rotates for two weeks, the first notch 531 rotates to the chute 23 again, and the second notch 551 returns to the chute 23 after completing one rotation, so that the first scraping rod 442 enters the chute 23 to stop the rotating drum 3 from rotating, and the scraping rod 44 cleans the smoke dust on the waste heat exchange drum 2 twice, so that the surface of the waste heat exchange drum 2 is cleaner, and the heat conduction efficiency of the waste heat exchange drum 2 is further improved.
In the present embodiment, the boiler 102 is provided with an air intake cylinder 11. The air intake cylinder 11 is coaxially provided at the rear end of the drum 3. The rear end of the air intake cylinder 11 is connected to the outer wall of the boiler 102 and communicates with the interior of the boiler 102 to allow the boiler 102 flue gas to exit the boiler 102. The front end of the air inlet cylinder 11 is rotatably connected with the rear end of the rotary drum 3 in a sealing way, and the air inlet cylinder 11 and the rotary drum 3 can slide back and forth relatively. The support 101 is provided with an exhaust pipe 12. The exhaust pipe 12 is coaxially provided at the front end of the drum 3. The front end of the exhaust pipe 12 is fixed to the bracket 101. The rear end of the exhaust tube 12 is rotatably connected with the front end of the rotary drum 3 in a sealing way, and the exhaust tube 12 and the rotary drum 3 can slide back and forth relatively. The flue gas of the boiler 102 is discharged after passing through the air inlet cylinder 11, the rotary drum 3 and the exhaust cylinder 12, and exchanges waste heat with the heat exchange medium conveying structure when passing through the rotary drum 3.
In this embodiment, the heat exchange medium conveying structure further comprises a feed pipe 13 and a discharge pipe 14. The feeding pipe 13 is arranged in the air inlet cylinder 11 and is positioned at the rear end of the waste heat exchange cylinder 2, the front end of the feeding pipe is arranged along the axis of the air inlet cylinder 11, and the rear end of the feeding pipe is outwards arranged through the air inlet cylinder 11. The front end of the feed pipe 13 is connected with the rear end of the waste heat exchange tube 2 in a sealing way in a sliding way. The discharging pipe 14 is arranged in the air inlet cylinder 11 and is positioned at the front end of the waste heat exchange cylinder 2, the rear end of the discharging pipe is arranged along the axis of the waste heat exchange cylinder 2, and the front end of the discharging pipe outwards passes through the air outlet cylinder. The rear end of the discharging pipe 14 is connected with the front end of the residual heat exchange tube 2 in a sealing way in a sliding way. The heat exchange medium enters the waste heat exchange tube 2 from the feed tube 13 and is discharged into the circulating structure through the discharge tube 14, and the heat exchange medium exchanges heat with the flue gas of the boiler 102 with heat at the waste heat exchange tube 2, so that the heat energy released by the boiler 102 after combustion is utilized to a greater extent.
In this embodiment, a connecting rod 32 is provided between the first scraper 442 and the drum 3. The connecting rod 32 is disposed along the radial direction of the drum 3, one end of which is fixed to the outer wind ring 31, and the other end of which is fixed to the first scraping rod 442. The connecting rod 32 secures the scraper bar 44 to the drum 3.
In the present embodiment, an exhaust gas purifying treatment device 103 is connected to the front end of the exhaust pipe 12. The exhaust gas purifying device 103 is fixed to the bracket 101. The flue gas after heat exchange is treated by the tail gas purifying treatment equipment 103 and then discharged.
In combination with the above embodiment, the use principle and working process of the present invention are as follows: when the boiler is used, when the flue gas of the boiler 102 passes through the rotary drum 3, the waste heat is transmitted to the heat exchange medium in the waste heat exchange drum 2 through the waste heat exchange drum 2, the inner wind sensing ring 21 and the outer wind sensing ring 31 are pressed, the inner wind sensing ring 21 drives the waste heat exchange drum 2 to move forward and compress the inner spring 41, the outer wind sensing ring 31 drives the rotary drum 3 to move forward and compress the outer spring 42, and before the accumulated amount of smoke dust on the waste heat exchange drum 2 and the inner wind sensing ring 21 is lower than a preset value, the first scraping rod 442 is blocked in the chute 23 to prevent the rotary drum 3 from rotating. When the smoke dust blocks the ventilation holes 22 on the inner wind sensing ring 21 to gradually increase the stress area, the pressure of the smoke gas to the waste heat exchange tube 2 is gradually increased to drive the waste heat exchange tube 2 to continuously move forwards to compress the inner spring 41.
When the flue gas exhausted by the boiler 102 makes the stress change of the inner wind sensing ring 21 reach a preset value to enable the waste heat exchange cylinder 2 and the rotary drum 3 to relatively move, and drives the scraping rod piece 44 to move to the unlocking position, the waste heat exchange cylinder 2 is driven by the pressure of the waste heat exchange cylinder 2 to drive the inner wind sensing ring 21 to move forward to the dedusting gap 441, the scraping rod piece 44 does not stop the rotary drum 3 from rotating any more, and then the inner wind sensing ring 21 enters the dedusting gap 441. The scraping rod piece 44 scrapes off smoke dust on the surfaces of the waste heat exchange cylinder 2 and the inner wind sensing ring 21 under the rotation of the rotary cylinder 3. That is, when the dust blocks the ventilation hole 22 to increase the stress area of the inner wind sensing ring 21 to a predetermined value, the dust wind pressure drives the waste heat exchange tube 2 to move forward to enable the inner wind sensing ring 21 to enter the dust removing gap 441, and the fan blade 43 drives the rotary drum 3 to drive the rod 44 to rotate to remove dust from the waste heat exchange tube 2 and the inner wind sensing ring 21, so that the dust on the waste heat exchange tube 2 is automatically removed, and the heat conducting efficiency of the waste heat exchange tube 2 is kept at a high level as a whole.
Further, when the drum 3 drives the scraping rod 44 to rotate, the first scraping rod 442 drives the synchronizing ring 53 to synchronously rotate through the matching rod 532. The roller 56 on the adjusting ring 55 is driven to rotate while the synchronizing ring 53 rotates to drive the adjusting ring 55 to rotate, and the rotating speed of the synchronizing ring 53 is twice that of the adjusting ring 55, so that when the drum 3 rotates around the first scraping rod 442 and returns to the chute 23, and the first notch 531 rotates to the chute 23, the second notch 551 only rotates by half a circumference, and the adjusting ring 55 prevents the first scraping rod 442 from entering the chute 23. After the drum 3 rotates for two weeks, the first notch 531 rotates to the chute 23 again, and the second notch 551 returns to the chute 23 after completing one rotation, so that the first scraper 442 enters the chute 23 to stop the drum 3 from rotating, and the waste heat exchange drum 2 is reset along with the reset of the inner spring 41. The rotation speed ratio of the synchronizing ring 53 to the regulating ring 55 is two to one through the use of the roller 56, so that the scraping rod piece 44 clears smoke dust on the waste heat exchange tube 2 twice, the surface of the waste heat exchange tube 2 is cleaner, and the heat conduction efficiency of the waste heat exchange tube 2 is further improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. The utility model provides a boiler flue gas waste heat circulation absorption equipment, includes the support of establishing in boiler the place ahead, its characterized in that: further comprises: the flue gas conveying structure comprises a rotary drum arranged front and back; the rotary drum can slide back and forth and is rotatably arranged on the boiler shell; the flue gas conveying structure is configured to exchange waste heat when boiler flue gas passes through the rotary drum;
the heat exchange medium conveying structure comprises a front heat exchange cylinder and a rear heat exchange cylinder; the waste heat exchange cylinder is coaxially arranged in the rotary cylinder in a way of sliding back and forth; the heat exchange medium conveying structure is configured to circulate the heat capacity carrier through the waste heat exchange cylinder, and when the flue gas passes through the rotary cylinder, waste heat in the flue gas is transferred to the heat exchange medium through the waste heat exchange cylinder;
the plurality of inner wind sensing rings are uniformly distributed along the length direction of the waste heat exchange cylinder; the inner wind sensing ring is sleeved and fixed on the outer side wall of the residual heat exchange cylinder; the inner wind sensing ring is provided with a plurality of ventilation holes; a chute is arranged on the inner wind sensing ring; the sliding groove is a through groove which is arranged along the radial direction of the waste heat exchange cylinder, and penetrates through the peripheral wall surface of the inner wind sensing ring;
the outer induction air rings are uniformly distributed along the axial direction of the rotary drum and fixedly connected to the inner peripheral wall of the rotary drum;
the cleaning structure comprises a plurality of scraping rod pieces which are uniformly distributed along the axial direction of the waste heat exchange cylinder and can axially slide along the waste heat exchange cylinder, and the scraping rod pieces are connected to the rotary cylinder; a dust removing gap is formed between two adjacent scraping rod pieces; the cleaning structure is provided with a corresponding locking position and an unlocking position before and after the scraping rod piece slides, when the cleaning structure is positioned at the locking position, the scraping rod piece is positioned in the sliding groove and limits the rotation of the rotary drum, and when the cleaning structure is positioned at the unlocking position, the inner wind sensing ring is positioned in the dust removing gap so as to enable the rotary drum to rotate.
2. The boiler flue gas waste heat recycling and absorbing device according to claim 1, wherein: the cleaning structure also comprises an inner spring, an outer spring and fan blades; the inner spring is arranged between the waste heat exchange cylinder and the bracket; the outer spring is arranged between the rotary drum and the bracket; the fan blades are spirally distributed on the inner peripheral wall of the rotary drum so as to provide rotating force for the rotary drum when smoke passes through the rotary drum; the size of the dust removing gap is adapted to the thickness of the inner wind sensing ring.
3. The boiler flue gas waste heat recycling and absorbing device according to claim 2, wherein: the scraping rod piece comprises a first scraping rod and two second scraping rods, the two second scraping rods are respectively connected to the two ends of the first scraping rod, so that the scraping rod piece is approximately concave, the first scraping rods are axially arranged along the waste heat exchange cylinder and are abutted to the peripheral wall surface of the waste heat exchange cylinder, one ends, away from the first scraping rods, of the second scraping rods are abutted to the rotating cylinder, and two adjacent second scraping rods on different scraping rods form dust removing gaps.
4. A boiler flue gas waste heat recycling absorbing apparatus according to claim 3, wherein: the device also comprises a clearing structure; the re-cleaning structure comprises a synchronizing ring, a regulating ring and a transmission piece; the synchronous ring is provided with a first notch, the regulating ring is provided with a second notch, and when the first notch, the second notch and the sliding groove are axially overlapped along the waste heat exchange cylinder, the cleaning structure is positioned at an unlocking position; the synchronous ring and the scraping rod piece synchronously rotate, and the transmission piece enables the synchronous ring to rotate at N times of the rotation speed of the regulating ring, wherein N is a positive integer.
5. The boiler flue gas waste heat recycling and absorbing device according to claim 4, wherein: the re-cleaning structure also comprises a synchronous groove, an annular groove and a mounting groove; the synchronous groove is arranged on the first scraping rod in a front-back manner, and the opening of the synchronous groove faces the waste heat exchange cylinder; the annular groove is arranged on the peripheral wall of the waste heat exchange cylinder; the synchronizing ring is rotatably arranged in the annular groove; the synchronous ring is connected with a matching rod; the matching rod is fixedly arranged on the synchronous ring along the front-back direction; the matching rod is slidably arranged in the synchronous groove; the first notch is positioned at the matching rod; the mounting groove is annular, is arranged at the joint of the inner induced air ring and the residual heat exchange cylinder, and is opened towards the annular groove; the regulating ring is arranged between the inner wind sensing ring and the synchronizing ring and is rotatably arranged in the mounting groove; the transmission piece is arranged on the regulating ring and is positioned between the synchronous ring and the mounting groove.
6. The boiler flue gas waste heat recycling and absorbing device according to claim 5, wherein: the transmission part is a plurality of rollers; a plurality of rollers are uniformly distributed along the circumferential direction of the regulating ring; the roller is radially rotatably arranged on the regulating ring around the regulating ring; the diameter of the roller is larger than the thickness of the regulating ring, and the roller is in butt joint and friction fit with the synchronous ring and the bottom surface of the mounting groove.
7. The boiler flue gas waste heat recycling and absorbing device according to claim 1, wherein: the boiler is provided with an air inlet cylinder; the air inlet cylinder is coaxially arranged at the rear end of the rotary drum; the rear end of the air inlet cylinder is connected to the outer wall of the boiler; the front end of the air inlet cylinder is rotatably connected with the rear end of the rotary drum in a sealing way, and the air inlet cylinder and the rotary drum can slide back and forth relatively; the bracket is provided with an exhaust pipe; the exhaust drum is coaxially arranged at the front end of the rotary drum; the front end of the exhaust funnel is fixed on the bracket; the rear end of the exhaust tube is rotatably connected with the front end of the rotary drum in a sealing way, and the exhaust tube and the rotary drum can slide back and forth relatively.
8. The boiler flue gas waste heat recycling and absorbing device according to claim 7, wherein: the heat exchange medium conveying structure also comprises a feeding pipe and a discharging pipe; the feed pipe is arranged in the air inlet cylinder and is positioned at the rear end of the waste heat exchange cylinder, the front end of the feed pipe is arranged along the axis of the air inlet cylinder, and the rear end of the feed pipe outwards penetrates through the air inlet cylinder; the front end of the feed pipe is connected with the rear end of the residual heat exchange cylinder in a sealing way in a sliding way back and forth manner; the discharging pipe is arranged in the air inlet cylinder and is positioned at the front end of the waste heat exchange cylinder, the rear end of the discharging pipe is arranged along the axis of the waste heat exchange cylinder, and the front end of the discharging pipe outwards penetrates through the air outlet cylinder; the rear end of the discharging pipe can slide back and forth and is connected with the front end of the residual heat exchange tube in a sealing way.
9. A boiler flue gas waste heat recycling absorbing apparatus according to claim 3, wherein: a connecting rod is arranged between the first scraping rod and the rotary drum; the connecting rod is arranged along the radial direction of the rotary drum, one end of the connecting rod is fixed on the external wind ring, and the other end of the connecting rod is fixed on the first scraping rod.
10. The boiler flue gas waste heat recycling and absorbing device according to claim 4, wherein: the front end of the exhaust barrel is connected with tail gas purifying treatment equipment; the tail gas purifying treatment equipment is fixed on the bracket.
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| CN202211735209.3A CN115950297B (en) | 2022-12-31 | 2022-12-31 | Boiler flue gas waste heat circulation absorption equipment |
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| CN202211735209.3A CN115950297B (en) | 2022-12-31 | 2022-12-31 | Boiler flue gas waste heat circulation absorption equipment |
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| CN115950297A CN115950297A (en) | 2023-04-11 |
| CN115950297B true CN115950297B (en) | 2023-08-25 |
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Citations (6)
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|---|---|---|---|---|
| FR2439630A1 (en) * | 1978-10-23 | 1980-05-23 | Montage Cie Indle | Mechanism to clean smoke tubes of boiler, economiser etc. - in which each tube is scraped by internal power driven auger |
| JP2001017814A (en) * | 1999-07-07 | 2001-01-23 | Niigata Eng Co Ltd | Dust collecting apparatus of asphalt plant |
| JP5435605B1 (en) * | 2012-12-05 | 2014-03-05 | 小林工業株式会社 | Scraping heat exchanger |
| WO2014182256A1 (en) * | 2013-05-06 | 2014-11-13 | Žilinská Univerzita V Žiline | Recuperative unit for a smelting aggregate |
| CN212720924U (en) * | 2020-07-31 | 2021-03-16 | 中众泰德能源集团有限公司 | Flue gas waste heat power generation device |
| CN114192128A (en) * | 2021-12-13 | 2022-03-18 | 温州一霖再生资源有限公司 | Activated carbon regeneration equipment with exhaust-heat boiler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003021179A1 (en) * | 2001-08-29 | 2003-03-13 | Conagra Grocery Products Company | Seal-less magnetically driven scraped-surface heat exchanger |
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2022
- 2022-12-31 CN CN202211735209.3A patent/CN115950297B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2439630A1 (en) * | 1978-10-23 | 1980-05-23 | Montage Cie Indle | Mechanism to clean smoke tubes of boiler, economiser etc. - in which each tube is scraped by internal power driven auger |
| JP2001017814A (en) * | 1999-07-07 | 2001-01-23 | Niigata Eng Co Ltd | Dust collecting apparatus of asphalt plant |
| JP5435605B1 (en) * | 2012-12-05 | 2014-03-05 | 小林工業株式会社 | Scraping heat exchanger |
| WO2014182256A1 (en) * | 2013-05-06 | 2014-11-13 | Žilinská Univerzita V Žiline | Recuperative unit for a smelting aggregate |
| CN212720924U (en) * | 2020-07-31 | 2021-03-16 | 中众泰德能源集团有限公司 | Flue gas waste heat power generation device |
| CN114192128A (en) * | 2021-12-13 | 2022-03-18 | 温州一霖再生资源有限公司 | Activated carbon regeneration equipment with exhaust-heat boiler |
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| CN115950297A (en) | 2023-04-11 |
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