CN115289460A - Circulating fluidized bed boiler tail flue resistance treatment structure and treatment method thereof - Google Patents

Circulating fluidized bed boiler tail flue resistance treatment structure and treatment method thereof Download PDF

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Publication number
CN115289460A
CN115289460A CN202210930315.0A CN202210930315A CN115289460A CN 115289460 A CN115289460 A CN 115289460A CN 202210930315 A CN202210930315 A CN 202210930315A CN 115289460 A CN115289460 A CN 115289460A
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China
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pipeline
hydraulic
sliding
wall
fixedly connected
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CN115289460B (en
Inventor
荣俊
杨光
袁东辉
王研凯
蔡斌
韩义
于英利
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Inner Mongolia Electric Power Research Institute of Inner Mongolia Power Group Co Ltd
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Inner Mongolia Electric Power Research Institute of Inner Mongolia Power Group Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00Fluidised bed combustion apparatus
    • F23C10/18Details; Accessories
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • F23J3/02Cleaning furnace tubes; Cleaning flues or chimneys
    • F23J3/026Cleaning furnace tubes; Cleaning flues or chimneys cleaning the chimneys
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage

Abstract

The invention discloses a resistance treatment structure of a tail flue of a circulating fluidized bed boiler and a treatment method thereof in the technical field of boiler manufacture, and the resistance treatment structure comprises a first pipeline, a second pipeline, a sliding pipeline and a pushing mechanism, wherein the sliding pipeline is positioned at a position where dust is easy to accumulate in the tail flue, the sliding pipeline is in sliding connection with the outer wall of the lower end of the first pipeline, the sliding pipeline is in sliding connection with the outer wall of the upper end of the second pipeline, the first pipeline is externally connected with a relevant mechanism in the air inlet direction of the tail flue, the second pipeline is externally connected with a relevant mechanism in the air exhaust direction of the tail flue, the pushing mechanism is arranged on the outer wall of the sliding pipeline, and the pushing mechanism is used for pushing the sliding pipeline to vertically slide after the dust is accumulated on the inner wall of the sliding pipeline, and scraping the accumulated dust through the end part of the first pipeline or the second pipeline; the dust deposit at the sliding pipeline can be automatically cleaned without stopping, and meanwhile, the relevant dust removing component can not generate adverse effect on the permeability of the sliding pipeline.

Description

Circulating fluidized bed boiler tail flue resistance treatment structure and treatment method thereof
Technical Field
The invention relates to the technical field of boiler manufacturing, in particular to a resistance treatment structure and a resistance treatment method for a tail flue of a circulating fluidized bed boiler.
Background
The circulating fluidized bed boiler adopts fluidized combustion, and the main structure comprises a combustion chamber (comprising a dense-phase zone and a dilute-phase zone) and a circulating return furnace (comprising a high-temperature gas-solid separator and a return system). The biggest difference with the bubbling fluidized bed combustion technology is that the operation wind speed is high, heterogeneous reaction processes such as combustion and desulfurization are strengthened, the boiler capacity can be enlarged to a large capacity (600 MW or above grade) acceptable by the power industry, and the circulating fluidized bed boiler well solves the basic problems of thermology, mechanics, materials and the like and the engineering problems of expansion, abrasion, over temperature and the like, and becomes an advanced technology for energy utilization of difficult-to-burn solid fuels (such as coal gangue, oil shale, municipal refuse, sludge and other wastes).
The circulating fluidized bed boiler has low requirement on fuel, so that the dust content in tail gas generated by the circulating fluidized bed boiler is high, in the using process, dust is easy to accumulate due to the influence of a structure and a function mechanism on a segment of the inner wall of a tail flue, the inner wall of the segment accumulates the dust, the resistance of the tail flue is increased, and adverse influence is caused on the normal operation of equipment.
Based on the design, the invention designs the resistance treatment structure and the treatment method of the tail flue of the circulating fluidized bed boiler so as to solve the problems.
Disclosure of Invention
The invention aims to provide a tail flue resistance treatment structure and a treatment method thereof of a circulating fluidized bed boiler, and aims to solve the problems that the tail flue resistance of the circulating fluidized bed boiler is increased under the condition that the requirement on fuel is low, so that the dust content in tail gas generated by the circulating fluidized bed boiler is high, and dust is easily accumulated due to the influence of a structure and a functional mechanism on a part of a section of the inner wall of the tail flue during use, so that the dust is accumulated on the inner wall of the section, and further the resistance of the tail flue is increased, and adverse effects are caused on the normal operation of equipment.
In order to achieve the purpose, the invention provides the following technical scheme: circulating fluidized bed boiler afterbody flue resistance handles structure, including first pipeline, second pipeline, slip pipeline and pushing mechanism, the slip pipeline is located the easy deposition position of afterbody flue, slip pipeline and first pipeline lower extreme outer wall sliding connection, slip pipeline and second pipeline upper end outer wall sliding connection, first pipeline is external to have the relevant mechanism of afterbody flue direction of admitting air, the second pipeline is external to have the relevant mechanism of afterbody flue exhaust direction, pushing mechanism sets up at the slip pipeline outer wall, pushing mechanism is used for promoting the vertical slip of slip pipeline behind slip pipeline inner wall deposition, strikes off the deposition through the tip of first pipeline or second pipeline.
As a further scheme of the invention, the pushing mechanism comprises a hydraulic tank, the hydraulic tank is connected with the outer wall of the sliding pipeline in a sealing and sliding manner, a fixing mechanism is connected outside the hydraulic tank, and the hydraulic tank is fixedly connected with the first pipeline and the second pipeline through the fixing mechanism; the lower end of the hydraulic tank is fixedly connected with a first hydraulic mechanism, the first hydraulic mechanism comprises a first hydraulic pipe, the first hydraulic pipe is communicated with the hydraulic tank, the first hydraulic pipe is fixedly connected with a second hydraulic pipe, the second hydraulic pipe is communicated with the first hydraulic pipe, the lower end of the second hydraulic pipe is fixedly communicated with a third hydraulic pipe, the lower end of the third hydraulic pipe is vertically and slidably connected with a piston rod, and the piston rod is connected with the end part of a sliding pipeline; the outer wall of the hydraulic tank is fixedly connected with a constant-temperature heating mechanism, and the temperature of the constant-temperature heating mechanism is higher than the temperature of tail gas in the sliding pipeline.
As a further scheme of the invention, a second hydraulic mechanism is arranged at the upper end of the hydraulic tank, the second hydraulic mechanism and the first hydraulic mechanism have the same structure, the length of the sliding pipeline is more than twice of the distance between the first pipeline and the second pipeline, clamping grooves are formed in the inner wall of the first hydraulic pipe, a first piston plate is connected to the clamping grooves in a sliding and sealing mode, a trigger switch is arranged on one side, close to the hydraulic tank, of the first piston plate, a spring is fixedly connected to one side, close to the hydraulic tank, of the first piston plate, a second piston plate is fixedly connected to the spring, a trigger rod is fixedly connected to one side, far away from the hydraulic tank, of the second piston plate, clamping blocks are arranged on two sides of the first piston plate and the second piston plate, the clamping blocks can be clamped with the clamping grooves, and the clamping blocks can be retracted into the first piston plate when the trigger switch and the trigger rod are squeezed.
As a further scheme of the invention, the outer side walls of the upper end and the lower end of the sliding pipeline are fixedly connected with first gears, the first gears are all meshed with second gears, one end of each second gear, which is close to a second hydraulic pipe, is fixedly connected with a transmission shaft, the transmission shaft is rotatably connected with a mounting plate, the mounting plate is rotatably connected with a piston rod, the mounting plate is fixedly connected with a hydraulic box, the transmission shaft is rotatably connected with a hydraulic box, a hydraulic wheel is rotatably arranged in the hydraulic box, the transmission shaft is fixedly connected with the hydraulic wheel, the side wall of the hydraulic box is communicated with the upper end of the side wall of the hydraulic box in a penetrating manner, the upper end of the hydraulic box is fixedly connected with a fourth hydraulic pipe, the fourth hydraulic pipe and the hydraulic box are provided with a communicating groove, the fourth hydraulic pipe is vertically and slidably connected with a straight rod, the straight rod is fixedly connected with the first piston, the straight rod is opposite to the second hydraulic pipe, the inner wall of the hydraulic box is slidably connected with a second piston, the second piston is fixedly connected with a second spring, and the second spring is fixedly connected with one end of the hydraulic box, which is close to the mounting plate.
As a further scheme of the invention, one ends of the first pipeline and the second pipeline, which are close to the sliding pipeline, are fixedly connected with scraping wheels.
As a further scheme of the invention, one end of the constant-temperature heating mechanism is externally connected and communicated with an air outlet of the combustion chamber, and the other end of the constant-temperature heating mechanism is externally connected with an air inlet of the heat collecting mechanism.
As a further aspect of the present invention, the second hydraulic pipe is externally connected to a constant temperature control mechanism.
The resistance treating method for tail flue of circulating fluidized bed boiler includes the following steps:
s1, when the boiler tail gas cleaning device works, boiler tail gas flows through the inner wall of a sliding pipeline which is easy to accumulate dust, so that the dust on the inner wall of the sliding pipeline is gradually accumulated and thickened;
s2, in the process, the pushing mechanism pushes the sliding pipeline to vertically slide, and accumulated dust on the inner wall of the sliding pipeline is scraped through the end part of the first pipeline or the second pipeline;
s3, blowing the scraped accumulated dust out of the tail flue along with the tail gas.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the sliding pipeline of the tail flue segment easy to accumulate dust is connected with the outer walls of the first pipeline and the second pipeline in a sliding manner, and the pushing mechanism is arranged to enable the sliding pipeline to vertically slide relative to the first pipeline and the second pipeline, so that the deposited dust on the inner wall of the sliding pipeline can be scraped off through the end part of the first pipeline or the second pipeline, the deposited dust on the sliding pipeline can be automatically cleaned without stopping, and meanwhile, the relevant dust removing component can not generate adverse influence on the permeability of the sliding pipeline.
2. Through addding second hydraulic mechanism, first piston plate, spring and second piston plate isotructure, the distance that makes the slip pipeline once scrape the ash is the distance of first pipeline to second pipeline, the slip pipeline inner wall between first pipeline to second pipeline after guaranteeing to scrape the ash is all cleared up, avoid the production at clearance dead angle, utilize the spring to hold up the trend simultaneously, make equipment can reach the certain degree after the deposition, just can scrape the ash, and then reduce and scrape the ash number of times, reduce equipment wear.
3. The vertical slip of slip pipeline and rotation make the scraping wheel carry out scraping once through the pivoted mode to slip pipeline inner wall earlier to this increases the cleanliness in the slip pipeline, has also reduced the port department wearing and tearing of first pipeline and second pipeline simultaneously, avoids during the dust gets into the joint gap between first pipeline or second pipeline and slip pipeline, causes the wearing and tearing increase of first pipeline, second pipeline and slip pipeline, and the life-span reduces.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic front sectional view of the overall structure of the present invention;
FIG. 3 is an enlarged view of the structure at A in FIG. 2;
FIG. 4 is an enlarged view of the structure at B in FIG. 3;
FIG. 5 is an enlarged view of the structure at C in FIG. 3;
FIG. 6 is a schematic top-down view of the overall structure of the present invention;
FIG. 7 is an enlarged view of the structure at D in FIG. 6;
FIG. 8 is a process flow diagram of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
the hydraulic scraper comprises a first pipeline 11, a second pipeline 12, a sliding pipeline 2, a hydraulic tank 31, a first hydraulic pipe 32, a second hydraulic pipe 33, a third hydraulic pipe 34, a piston rod 35, a constant temperature heating mechanism 36, a clamping groove 41, a first piston plate 42, a clamping block 43, a trigger switch 44, a spring 45, a second piston plate 46, a trigger rod 47, a first gear 51, a second gear 52, a transmission shaft 53, a mounting plate 54, a hydraulic tank 55, a hydraulic box 56, a hydraulic wheel 57, a fourth hydraulic pipe 58, a communication groove 59, a first piston 510, a straight rod 511, a second spring 512, a second piston 513 and a scraper wheel 6.
Detailed Description
Referring to fig. 1-8, the present invention provides a technical solution: circulating fluidized bed boiler afterbody flue resistance handles structure, including first pipeline 11, second pipeline 12, slip pipeline 2 and pushing mechanism, slip pipeline 2 is located the easy deposition position of afterbody flue, slip pipeline 2 and 11 lower extreme outer wall sliding connection of first pipeline, slip pipeline 2 and 12 upper end outer wall sliding connection of second pipeline, first pipeline 11 is external to have the relevant mechanism of afterbody flue direction of admitting air, second pipeline 12 is external to have the relevant mechanism of afterbody flue direction of exhausting, pushing mechanism sets up at slip pipeline 2 outer walls, pushing mechanism is used for promoting the vertical slip of slip pipeline 2 behind the deposition of slip pipeline 2 inner walls, and the tip through first pipeline 11 or second pipeline 12 strikes off the deposition.
During operation, the tail gas of the boiler flows into the tail flue and is discharged from the tail flue, and in the process, tail gas circulates on the inner wall of the sliding pipeline 2, which is most prone to dust deposition, so that dust on the inner wall of the sliding pipeline 2 gradually accumulates to thicken, the pushing mechanism pushes the sliding pipeline 2 to vertically slide, the deposited dust on the inner wall of the sliding pipeline 2 is scraped by the end part of the first pipeline 11 or the second pipeline 12, and then the scraped deposited dust is blown out of the tail flue along with the tail gas.
According to the invention, the sliding pipeline 2 of the tail flue segment easy to accumulate dust is connected with the outer walls of the first pipeline 11 and the second pipeline 12 in a sliding manner, and the pushing mechanism is arranged to enable the sliding pipeline 2 to vertically slide relative to the first pipeline 11 and the second pipeline 12, so that the deposited dust on the inner wall of the sliding pipeline 2 can be scraped off through the end part of the first pipeline 11 or the second pipeline 12, the deposited dust at the sliding pipeline 2 can be automatically cleaned without stopping, and meanwhile, the relevant dust removing component can not generate adverse influence on the permeability of the sliding pipeline 2.
As a further scheme of the present invention, the pushing mechanism includes a hydraulic tank 31, the hydraulic tank 31 is connected with the outer wall of the sliding pipeline 2 in a sealing and sliding manner, a fixing mechanism is externally connected to the hydraulic tank 31, and the hydraulic tank 31 is fixedly connected with the first pipeline 11 and the second pipeline 12 through the fixing mechanism; the lower end of the hydraulic tank 31 is fixedly connected with a first hydraulic mechanism, the first hydraulic mechanism comprises a first hydraulic pipe 32, the first hydraulic pipe 32 is communicated with the hydraulic tank 31, the first hydraulic pipe 32 is fixedly connected with a second hydraulic pipe 33, the second hydraulic pipe 33 is communicated with the first hydraulic pipe 32, the lower end of the second hydraulic pipe 33 is fixedly communicated with a third hydraulic pipe 34, the lower end of the third hydraulic pipe 34 is vertically and slidably connected with a piston rod 35, and the piston rod 35 is connected with the end of the sliding pipeline 2; the outer wall of the hydraulic tank 31 is fixedly connected with a constant temperature heating mechanism 36, and the temperature of the constant temperature heating mechanism 36 is higher than the temperature of tail gas in the sliding pipeline 2.
When the exhaust gas purification device works, heat in the exhaust gas can pass through dust deposited on the inner wall of the sliding pipeline 2 and the pipe wall of the sliding pipeline 2 along with the tail gas passing through the sliding pipeline 2 and is subjected to heat interaction with hydraulic oil in the hydraulic tank 31, and correspondingly, the heat transfer efficiency from the tail gas in the sliding pipeline 2 to the hydraulic oil in the hydraulic tank 31 is reduced along with the increase of the thickness of the dust deposited on the inner wall of the sliding pipeline 2; meanwhile, the constant-temperature heating mechanism 36 heats the hydraulic oil in the hydraulic tank 31, so that the temperature of the hydraulic oil is between the constant-temperature heating mechanism 36 and the temperature of the tail gas, and the temperature of the constant-temperature heating mechanism 36 is higher than the temperature of the tail gas in the sliding pipeline 2, so the constant-temperature heating mechanism 36 heats the hydraulic oil, the tail gas cools the hydraulic oil (the corresponding hydraulic oil can heat the tail gas), but the hydraulic tank 31 is smaller than the whole tail flue, the volume of the tail gas flowing through the sliding pipeline 2 in unit time is smaller than that of the hydraulic oil, so the actual heating effect of the hydraulic oil on the tail gas is poorer, and the influence on the temperature of the tail gas discharged finally is small), the corresponding thickness of the accumulated dust on the inner wall of the sliding pipeline 2 is increased along with the increase of the thickness of the accumulated dust on the inner wall of the sliding pipeline 2, the effect of cooling the tail gas on the hydraulic oil is reduced, the temperature of the hydraulic oil is increased, the hydraulic oil is expanded, the piston rod 35 is pushed upwards, the piston rod 35 pushes the sliding pipeline 2 upwards, and the accumulated dust on the inner wall of the sliding pipeline 2 is scraped.
As a further aspect of the present invention, a second hydraulic mechanism is disposed at the upper end of the hydraulic tank 31, the second hydraulic mechanism and the first hydraulic mechanism have the same structure, the length of the sliding pipeline 2 is greater than twice the distance between the first pipeline 11 and the second pipeline 12, the inner walls of the first hydraulic pipes 32 are both provided with a clamping groove 41, the inner walls of the first hydraulic pipes 32 at the clamping groove 41 are both connected with a first piston plate 42 in a sliding and sealing manner, one side of the first piston plate 42 close to the hydraulic tank 31 is provided with a trigger switch 44, one side of the first piston plate 42 close to the hydraulic tank 31 is fixedly connected with a spring 45, the spring 45 is fixedly connected with a second piston plate 46, one side of the second piston plate 46 far away from the hydraulic tank 31 is fixedly connected with a trigger rod 47, both sides of the first piston plate 42 and the second piston plate 46 are provided with clamping blocks 43, the clamping blocks 43 can be clamped with the clamping groove 41, and the clamping blocks 43 can be retracted into the first piston plate 42 when the trigger switch 44 and the trigger rod 47 are squeezed.
During operation, with the upper piston rod 35 extending as an initial state (at this time, the upper second piston plate 46 is engaged with the engagement groove 41, and the lower first piston plate 42 is engaged with the engagement groove 41), as the temperature of the hydraulic oil in the hydraulic tank 31 increases, the hydraulic oil gradually expands, both the upper and lower second piston plates 46 are squeezed by the hydraulic oil, wherein, as the upper second piston plate 46 is engaged with the engagement groove 41 and limited, the upper second piston plate 46 does not move, the lower second piston plate 46 moves toward the corresponding first piston plate 42, and as the lower second piston plate 46 approaches toward the corresponding first piston plate 42, the lower trigger switch 44 and the trigger rod 47 approach and squeeze, so that the lower engagement block 43 retracts, the lower first piston plate 42 is not engaged with the engagement groove 41, under the squeezing of the hydraulic oil in the hydraulic tank 31, the lower second piston plate 46 pushes the first piston plate 42 downward through the spring 45, so that the first piston plate 42 pushes the lower piston rod 35 upward through the second hydraulic pipe 33 and the third hydraulic pipe 34, and the piston rod 35 moves upward, and the upper half 2 of the second piston pipe is replaced by the upper half pipe 11; meanwhile, in the upward moving process of the sliding pipeline 2, the piston rod 35 above the sliding pipeline is pushed upwards, and then the first piston plate 42 above the sliding pipeline is pushed downwards to the clamping groove 41 through the hydraulic oil in the second hydraulic pipe 33 and the third hydraulic pipe 34 above the sliding pipeline (compressed by the springs 45 above and below to provide space for the hydraulic oil), meanwhile, the hydraulic oil in the second hydraulic pipe 33 and the third hydraulic pipe 34 is not in direct contact with the hydraulic oil in the hydraulic tank 31 and is not easily influenced by the temperature of the hydraulic oil in the hydraulic tank 31), and meanwhile, the hydraulic oil in the hydraulic tank 31 above the sliding pipeline is reduced in volume along with the reduction of the temperature of the hydraulic oil in the hydraulic tank 31 caused by the accumulated dust, the springs 45 above and below start to recover to a free state, so that the second piston plate 46 below the sliding pipeline is clamped with the clamping groove 41, and the first piston plate 42 above the sliding pipeline is clamped with the clamping groove 41.
Through addding second hydraulic mechanism, first piston plate 42, spring 45 and second piston plate 46 isotructure, make sliding pipeline 2 once scrape grey distance be first pipeline 11 to the distance of second pipeline 12, guarantee to scrape behind the grey first pipeline 11 to the second pipeline 12 the sliding pipeline 2 inner wall all cleared up, avoid the production at clearance dead angle, utilize spring 45 to accumulate simultaneously, make equipment can reach behind the certain degree at the deposition, just can scrape the grey, and then reduce and scrape grey number of times, reduce equipment wear and tear.
As a further scheme of the present invention, the outer side walls of the upper and lower ends of the sliding pipe 2 are fixedly connected with a first gear 51, the first gear 51 is engaged with a second gear 52, one end of the second gear 52 close to the second hydraulic pipe 33 is fixedly connected with a transmission shaft 53, the transmission shaft 53 is rotatably connected with an installation plate 54, the installation plate 54 is rotatably connected with the piston rod 35, the installation plate 54 is fixedly connected with a hydraulic tank 55, the transmission shaft 53 is rotatably connected with a hydraulic box 56, the hydraulic box 56 is rotatably provided with a hydraulic wheel 57, the transmission shaft 53 is fixedly connected with the hydraulic wheel 57, the side wall of the hydraulic box 56 is communicated with the upper end of the side wall of the hydraulic box 56 in a penetrating manner, the upper end of the hydraulic box 56 is fixedly connected with a fourth hydraulic pipe 58, the fourth hydraulic pipe 58 and the hydraulic box 56 are provided with a communication groove 59, the fourth hydraulic pipe 58 is vertically and slidably connected with a first piston 510, the first piston 510 is fixedly connected with a straight rod 511, the straight rod 511 is over against the second hydraulic pipe 33, the inner wall of the hydraulic tank 55 is slidably connected with a second piston 513, the second piston is fixedly connected with a second spring 512, and one end of the hydraulic tank 55 is close to the installation plate 512.
During operation, along with the vertical slip of sliding duct 2, one end trigger lever 47 in the upper and lower both ends retracts, go up end trigger lever 47 and retract for the example, second hydraulic pressure pipe 33 is close to and extrudes straight-bar 511, make first piston 510 pass through hydraulic pressure box 56 with the hydraulic oil in the fourth hydraulic pressure pipe 58 and extrude to hydraulic pressure case 55 in, when hydraulic oil flows through hydraulic pressure box 56, can drive liquid wheel 57 and rotate, further drive second gear 52 rotates, second gear 52 drives sliding duct 2 through first gear 51, make sliding duct 2 rotate when carrying out vertical slip, with this unobstructed nature that increases the vertical slip of sliding duct 2.
As a further scheme of the present invention, the scraping wheels 6 are fixedly connected to one ends of the first pipe 11 and the second pipe 12 close to the sliding pipe 2.
During operation, the vertical slip of slip pipeline 2 just rotates, makes scraping wheel 6 carry out a scraping through the pivoted mode to the 2 inner walls of slip pipeline earlier to this increases the cleanliness in the slip pipeline 2, has also reduced the port department wearing and tearing of first pipeline 11 and second pipeline 12 simultaneously, avoids during the dust gets into the joint gap between first pipeline 11 or second pipeline 12 and slip pipeline 2, causes the wearing and tearing increase of first pipeline 11, second pipeline 12 and slip pipeline 2, and the life-span reduces.
As a further scheme of the invention, one end of the constant temperature heating mechanism 36 is externally connected and communicated with a combustion chamber air outlet, and the other end of the constant temperature heating mechanism is externally connected with a heat collecting mechanism air inlet.
During operation, constant temperature heating mechanism 36 directly passes through the circulating line by the tail gas that does not carry out the heat collection that boiler combustion produced, and after constant temperature heating mechanism 36 provided the heating heat earlier, the refluence boiler carries out the heat collection, avoids the external energy, also can guarantee simultaneously that constant temperature heating mechanism 36's temperature is greater than the tail gas temperature of afterbody flue.
As a further embodiment of the present invention, a constant temperature control mechanism is externally connected to the second hydraulic pipe 33.
During operation, the constant temperature control mechanism keeps the temperature of the hydraulic oil in the second hydraulic pipe 33 constant all the time, and then ensures that the temperature of the hydraulic oil in the third hydraulic pipe 34 communicated with the hydraulic oil in the second hydraulic pipe 33 is constant all the time, so as to ensure the position accuracy of the piston rod 35.
The resistance treating method for tail flue of circulating fluidized bed boiler includes the following steps:
s1, when the boiler tail gas cleaning device works, boiler tail gas flows through the inner wall of a sliding pipeline 2 easy to accumulate dust, so that the dust on the inner wall of the sliding pipeline 2 is gradually accumulated and thickened;
s2, in the process, the pushing mechanism pushes the sliding pipeline 2 to vertically slide, and accumulated dust on the inner wall of the sliding pipeline 2 is scraped through the end part of the first pipeline 11 or the second pipeline 12;
s3, blowing the scraped accumulated dust out of the tail flue along with the tail gas.

Claims (8)

1. Circulating fluidized bed boiler afterbody flue resistance handles structure, its characterized in that: including first pipeline (11), second pipeline (12), slip pipeline (2) and pushing mechanism, slip pipeline (2) are located the easy deposition position of afterbody flue, slip pipeline (2) and first pipeline (11) lower extreme outer wall sliding connection, slip pipeline (2) and second pipeline (12) upper end outer wall sliding connection, first pipeline (11) are external to have the relevant mechanism of afterbody flue direction of admitting air, second pipeline (12) are external to have the relevant mechanism of afterbody flue direction of exhausting, pushing mechanism sets up at slip pipeline (2) outer wall, pushing mechanism is used for promoting the vertical slip of slip pipeline (2) after slip pipeline (2) inner wall deposition, strikes off the deposition through the tip of first pipeline (11) or second pipeline (12).
2. The circulating fluidized bed boiler back flue resistance treatment structure of claim 1, wherein: the pushing mechanism comprises a hydraulic tank (31), the hydraulic tank (31) is connected with the outer wall of the sliding pipeline (2) in a sealing and sliding mode, a fixing mechanism is connected outside the hydraulic tank (31), and the hydraulic tank (31) is fixedly connected with the first pipeline (11) and the second pipeline (12) through the fixing mechanism; the lower end of the hydraulic tank (31) is fixedly connected with a first hydraulic mechanism, the first hydraulic mechanism comprises a first hydraulic pipe (32), the first hydraulic pipe (32) is communicated with the hydraulic tank (31), the first hydraulic pipe (32) is fixedly connected with a second hydraulic pipe (33), the second hydraulic pipe (33) is communicated with the first hydraulic pipe (32), the lower end of the second hydraulic pipe (33) is fixedly communicated with a third hydraulic pipe (34), the lower end of the third hydraulic pipe (34) is vertically and slidably connected with a piston rod (35), and the piston rod (35) is connected with the end of the sliding pipeline (2); the outer wall of the hydraulic tank (31) is fixedly connected with a constant-temperature heating mechanism (36), and the temperature of the constant-temperature heating mechanism (36) is higher than the temperature of tail gas in the sliding pipeline (2).
3. The circulating fluidized bed boiler back flue resistance treatment structure of claim 2, wherein: hydraulic pressure jar (31) upper end is provided with second hydraulic mechanism, second hydraulic mechanism is unanimous with first hydraulic mechanism's structure, the length of slip pipeline (2) is greater than first pipeline (11) and second pipeline (12) interval of twice, joint groove (41) have all been seted up to first hydraulic pressure pipe (32) inner wall, first hydraulic pressure pipe (32) inner wall is located joint groove (41) and locates equal sliding seal to be connected with first piston plate (42), one side that first piston plate (42) are close to hydraulic pressure jar (31) is provided with trigger switch (44), one side fixedly connected with spring (45) that first piston plate (42) are close to hydraulic pressure jar (31), spring (45) fixedly connected with second piston plate (46), one side fixedly connected with trigger lever (47) of hydraulic pressure jar (31) are kept away from to second piston plate (46), first piston plate (42) and second piston plate (46) both sides all are provided with joint piece (43), joint piece (43) can with joint groove (41), trigger switch (44) and trigger lever (47) can make first extrusion piston plate (43) go into when getting into.
4. The circulating fluidized bed boiler tail flue resistance treatment structure of claim 3, characterized in that: the outer side wall of the upper end and the lower end of the sliding pipeline (2) is fixedly connected with a first gear (51), the first gear (51) is meshed with a second gear (52), the second gear (52) is close to one end of a second hydraulic pipe (33) and fixedly connected with a transmission shaft (53), the transmission shaft (53) is rotatably connected with a mounting plate (54), the mounting plate (54) is rotatably connected with a piston rod (35), the mounting plate (54) is fixedly connected with a hydraulic tank (55), the transmission shaft (53) is rotatably connected with a hydraulic box (56), a hydraulic wheel (57) is rotatably arranged in the hydraulic box (56), the transmission shaft (53) is fixedly connected with the hydraulic wheel (57), the side wall of the hydraulic box (56) is communicated with the upper end of the side wall of the hydraulic box (56) in a penetrating manner, the upper end of the hydraulic box (56) is fixedly connected with a fourth hydraulic pipe (58), the fourth hydraulic pipe (58) is provided with the hydraulic box (56) with a communication groove (59), the fourth hydraulic pipe (58) is vertically and slidably connected with a first piston (510), the first piston (510) is fixedly connected with a straight rod (513), the second piston (511) is fixedly connected with a second piston (511), the second spring (512) is fixedly connected with one end of the hydraulic tank (55) close to the mounting plate (54).
5. The circulating fluidized bed boiler back flue resistance treatment structure of claim 4, wherein: the scraper wheel (6) is fixedly connected to one end, close to the sliding pipeline (2), of the first pipeline (11) and one end, close to the second pipeline (12).
6. The circulating fluidized bed boiler back flue resistance treatment structure of claim 5, wherein: one end of the constant temperature heating mechanism (36) is externally connected and communicated with a combustion chamber air outlet, and the other end of the constant temperature heating mechanism is externally connected with a heat collecting mechanism air inlet.
7. The circulating fluidized bed boiler back flue resistance treatment structure of claim 6, wherein: the second hydraulic pipe (33) is externally connected with a constant temperature control mechanism.
8. The resistance treatment method of the tail flue of the circulating fluidized bed boiler is suitable for the resistance treatment structure of the tail flue of the circulating fluidized bed boiler, which is characterized in that; the method comprises the following steps:
s1, when the boiler tail gas cleaning device works, the boiler tail gas flows through the inner wall of the sliding pipeline (2) easy to deposit dust, so that the dust on the inner wall of the sliding pipeline (2) is gradually accumulated and thickened;
s2, in the process, the pushing mechanism pushes the sliding pipeline (2) to vertically slide, and accumulated dust on the inner wall of the sliding pipeline (2) is scraped through the end part of the first pipeline (11) or the second pipeline (12);
s3, blowing the scraped accumulated dust out of the tail flue along with the tail gas.
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CN114058775A (en) * 2021-11-18 2022-02-18 无锡翔龙环球科技股份有限公司 Multi-section expansion flue of waste heat boiler
CN215951381U (en) * 2021-09-08 2022-03-04 菏泽民生热力有限公司 Device for improving tail corrosion and dust deposition of circulating fluidized bed boiler

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5710018A (en) * 1980-06-18 1982-01-19 Hitachi Zosen Corp Dust removal device within flue
JP2001090934A (en) * 1999-09-22 2001-04-03 Takuma Co Ltd Cleaning device for pyrolysis gas duct
CN207831388U (en) * 2018-01-01 2018-09-07 海宁天悦电子有限公司 A kind of chimney has the energy-saving, environmental protection boiler of deashing function
CN210801234U (en) * 2019-10-09 2020-06-19 营口永德重工有限公司 Horizontal gas steam boiler
CN111678157A (en) * 2020-07-16 2020-09-18 国家能源集团泰州发电有限公司 Soot blower with adjustable online angle
CN214088386U (en) * 2020-09-28 2021-08-31 王俊 Telescopic coking gas conveying pipeline
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CN114058775A (en) * 2021-11-18 2022-02-18 无锡翔龙环球科技股份有限公司 Multi-section expansion flue of waste heat boiler

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