CN212673189U

CN212673189U - High-efficient heat transfer circulating fluidized bed boiler

Info

Publication number: CN212673189U
Application number: CN202020926886.3U
Authority: CN
Inventors: 刘上中
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-03-09
Anticipated expiration: 2030-05-28

Abstract

The utility model discloses a high-efficient heat transfer circulating fluidized bed boiler, include: the boiler comprises a boiler body and a grid deceleration mechanism; an air outlet inner wall is formed by winding the inner wall of the air outlet; the grid speed reduction mechanism comprises a transverse alloy plate and a longitudinal alloy plate; the first side wall of the transverse alloy plate is concave to form a matching wall, the first side wall is not concave to form a welding side wall, and the welding side wall is concave to form a welding through hole; the transverse alloy plate is provided with a first connecting part and a second connecting part; the first connecting part is matched with the second connecting part, and the transverse alloy plate is welded with the inner wall along the radial direction to form a transverse speed reducing belt; the longitudinal alloy plate is welded with the membrane wall along the height direction to form a longitudinal speed reducing belt; the inner wall of the air outlet is provided with a grid deceleration mechanism; the inner wall of the dense-phase area is provided with a grid speed reduction mechanism, and the grid speed reduction mechanism in the dense-phase area is covered with a fireproof heat conduction layer; and a grid speed reduction mechanism is arranged on the inner wall of the dilute phase region. The utility model provides high boiler thermal efficiency, prevent that coal-fired caking, extension continuous operation cycle and stability.

Description

High-efficient heat transfer circulating fluidized bed boiler

Technical Field

The utility model belongs to the technical field of circulating fluidized bed boiler, more specifically relates to a high-efficient heat transfer circulating fluidized bed boiler.

Background

The circulating fluidized bed boiler is a coal-fired boiler which has the highest industrialization degree and is relatively clean and efficient, adopts fluidized combustion, and is an advanced technology for energy utilization of difficult-to-combust solid fuels (such as coal gangue, oil shale, municipal refuse, sludge and other wastes). The energy generated by the combustion of the circulating fluidized bed boiler can be used for generating electricity and supplying heat, and the steam generated after the water in the hanging screen is boiled can also be directly used in industrial production (such as ironing in the clothing industry).

However, in the use process of the circulating fluidized bed boiler, the problem of abrasion of the inner wall of the hearth is faced, and aiming at the problem of serious abrasion of the heated surface, at present, one method is to cover the heated surface by using a wear-resistant inorganic material (hearth castable) in serious abrasion areas such as the vicinity of a smoke window outlet, the vicinity of a wall-through pipe, the bottom of a suspension screen, a dense-phase area and the like in the hearth of the circulating fluidized bed boiler to avoid abrasion, but the refractory material is passive and has a certain anti-abrasion effect, but the heat insulation performance of the castable reduces the effective heat absorption area of the hearth and reduces the heat exchange efficiency of the hearth; another (for example, patent with application number CN 201410300048) is to adopt an active manner of transversely arranging an anti-wear alloy plate on the inner wall of the boiler of the circulating fluidized bed boiler to realize surface deceleration, which is free from the coverage thickening of the above-mentioned existing passive manner, and ensures heat exchange efficiency, but the welding manner of the anti-wear alloy plate and the inner wall of the boiler is to weld the anti-wear alloy plate above or below the side wall thereof, and the welding seam of the welding manner is shallow, so that the anti-wear alloy plate and the inner wall of the boiler are not firmly welded, the anti-wear alloy plate is easily detached from the inner wall of the boiler under the environment of solid fuel scouring and self thermal expansion of the welding position, and data shows that the failure rate of the existing anti-wear alloy plate is as high as three per mill, and even more, because the anti-wear alloy plates are mutually arranged on the inner wall of the boiler in a mesh manner by overlapping, the anti-wear alloy plate which fails will be detached from the inner wall of the boiler to, the inner wall of the circulating fluidized bed boiler still has the adverse phenomena of local abrasion, hole penetration and the like, so that the maintenance cost of the circulating fluidized bed boiler is higher.

Disclosure of Invention

To the above defect or improvement demand of prior art, the utility model provides a high-efficient heat transfer circulating fluidized bed boiler.

In order to achieve the above object, the high efficiency heat exchange circulating fluidized bed boiler comprises:

the boiler comprises a boiler body and a grid deceleration mechanism;

the boiler body comprises a top plate, a bottom plate and a side wall; the top plate and the bottom plate are oppositely arranged, and the top plate is arranged above the bottom plate; the upper end of the side wall is connected with the top plate, and the lower end of the side wall is connected with the bottom plate; the inner wall of the side wall is formed by sequentially and hermetically connecting a membrane type wall pipe and a membrane type wall in the circumferential direction, and part of the pipe wall of the membrane type wall pipe protrudes inwards from the membrane type wall along the radial direction;

the boiler body sequentially comprises a dilute phase area and a dense phase area from top to bottom along the height direction of the boiler body; an air outlet communicated with the cyclone separator is formed in the side wall of the dilute phase region, and an air outlet inner wall is formed by winding the inner wall of the air outlet;

the grid speed reduction mechanism comprises alloy plates, and the alloy plates comprise transverse alloy plates and longitudinal alloy plates; the first side walls of the transverse alloy plates are spaced and inwards concave to form more than one matching wall, the parts of the first side walls, which are not inwards concave to form the matching walls, form welding side walls for welding with the membrane type walls, the welding side walls are inwards concave to form more than one welding through hole wall, and the welding through hole walls are surrounded to form welding through holes; the third side wall of the transverse alloy plate and the fourth side wall of the transverse alloy plate are oppositely arranged; a first connecting part is arranged on one side, close to the third side wall, of the transverse alloy plate; a second connecting part is arranged on one side, close to the fourth side wall, of the transverse alloy plate; the first connecting part and the second connecting part are suitable for realizing the connection of the two transverse alloy plates;

the transverse alloy plates are connected with the membrane wall in a welding mode through the welding through holes, so that more than one transverse alloy plates are sequentially spliced end to form a transverse speed reducing belt, and the matching wall is arranged on the outer side of the membrane wall pipe in a surrounding mode; the side walls of the longitudinal alloy plates are welded and connected with the membrane type wall along the height direction, so that more than one longitudinal alloy plates are sequentially spliced end to form a longitudinal speed reducing belt, and the longitudinal speed reducing belt and the transverse speed reducing belt are arranged in a grid shape;

the inner wall of the air outlet is provided with the grid deceleration mechanism; the inner wall of the dense-phase area is provided with the grid speed reduction mechanism, and the grid speed reduction mechanism in the dense-phase area is covered with a fireproof heat conduction layer; and the inner wall of the dilute phase area is provided with the grid deceleration mechanism.

Optionally, the first connecting portion is formed by a plate surface bulge of the alloy plate and comprises a supporting portion and a clamping portion, one end of the supporting portion is connected with the alloy plate, and the other end of the supporting portion is connected with the clamping portion; the second connecting part is a clamping groove connected with the clamping part in a buckling mode.

Optionally, the alloy plate is recessed in a position corresponding to the buckling part to form a sliding groove; the alloy plate is provided with a sliding buckle part which is in sliding connection with the sliding chute; the sliding buckle part and the clamping groove are respectively arranged on two plate surfaces of the alloy plate.

Optionally, the first connecting portion is formed by a plate surface protrusion of the alloy plate and includes a clamping column portion and a contact portion, one end of the clamping column portion is connected with the alloy plate, and the other end of the clamping column portion is connected with the contact portion; the second connecting part is a hook groove formed by inwards concave alloy plates; the clamping column part slides to the hook groove, so that more than two alloy plates are arranged in a step shape.

Optionally, the fifth side wall of the longitudinal alloy plate and the sixth side wall of the longitudinal alloy plate are oppositely arranged; the fifth side wall is provided with the first connecting portion, and the sixth side wall is provided with the second connecting portion, so that the longitudinal alloy plates are connected in the height direction.

Optionally, the first side wall is provided with three or more fitting walls at intervals, including a first fitting wall, one or more second fitting walls, and a third fitting wall; the second matching wall forms an arc matched with the membrane wall pipe; the first matching wall and the third matching wall are spliced together to form an arc matched with the membrane wall pipe, and the first matching wall and the third matching wall are respectively arranged on two sides of all the second matching walls.

Optionally, the mating wall spacing indent forms more than one transition wall.

Optionally, more than one welding through hole is formed in the seventh side wall of the longitudinal alloy plate in a spaced and concave mode, and the longitudinal alloy plate is welded with the membrane wall through the welding through holes; and/or a seventh side wall of the longitudinal alloy plate is welded with the membrane wall, and the part of the seventh side wall which is not welded with the membrane wall is recessed to form more than one avoiding groove.

Optionally, the side wall of the alloy plate far away from the membrane wall is recessed at intervals to form more than one flow groove.

Optionally, the dilute phase zone is provided with a superheater, and the outer side wall of the superheater is provided with more than one layer of protective shield formed by laying the longitudinal alloy plate.

Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can gain following beneficial effect:

(1) in the utility model, the horizontal alloy plate realizes the speed reduction of the boiler along the height direction, the horizontal alloy plate is connected with the membrane wall through the welding mode that the welding rod is inserted into the welding through hole, the firmness and the scouring resistance of the connection of the horizontal speed reduction belt and the membrane wall are improved, the probability that the horizontal alloy plate is separated from the membrane wall is reduced, and the fault rate (namely the proportion of the separation mode) is reduced; preferably, the adjacent transverse alloy plates are connected through the first connecting part and the second connecting part, so that even if part of the transverse alloy plates are separated from the membrane wall, the transverse speed reducing belt keeps the integrity of the membrane wall due to the connection relationship of the transverse speed reducing belt and the transverse alloy plates, and the adverse phenomena of local abrasion, hole penetration, pipe explosion and the like caused by the separation of the transverse alloy plates on the inner wall of a certain position are effectively avoided; the longitudinal alloy plates realize the speed reduction of the boiler along the circumferential direction (particularly in the areas where vortex, turbulent flow and turbulent flow phenomena occur); preferably, the arrangement of the transverse alloy plate and the longitudinal alloy plate has no thickening phenomenonLike, the effective heat exchange area and the heat exchange efficiency of the membrane wall pipe are ensured; preferably, only the dense-phase area of the whole boiler is thickened due to the arrangement of the fire-resistant heat conduction layer, and the coverage thickening area is small; the heat exchange efficiency is high; the utility model discloses arrange deceleration mechanism (horizontal deceleration area, vertical deceleration area) effectively to the fluid characteristic in each region of boiler to the all-round protection of boiler inner wall has been realized. Experimental data shows that the high-efficiency heat exchange circulating fluidized bed boiler can achieve the following technical effects: 1) energy conservation and consumption reduction, and the heat efficiency can be improved by more than 80 percent under the same boiler volume; 2) the temperature in the hearth is controlled to be lower than 900 ℃, and NO is effectively prevented_XTo thereby reduce NO_XDischarging; 3) the temperature in the hearth is reduced, so that the caking of the fire coal is effectively prevented, the work of manually clearing the caking is further avoided, and the safety of the boiler is improved; 4) through the improved design of the scheme, the continuous operation period of the boiler is greatly improved from 1 week to at least 2-3 years; 5) because the continuous operation period of the boiler is improved, the boiler does not need to be stopped for many times, a large amount of fuel for starting and stopping combustion of the hearth is saved, the coal consumption is reduced, and the fuel consumption in the starting process of the hearth is reduced; 6) through the improvement of the scheme, the continuous operation period of the boiler is greatly improved, the operation stability of equipment is improved, the use amounts of fire coal and fuel oil are reduced, and the economy is greatly improved; 7) the scheme greatly improves the heat absorption efficiency in the boiler, can greatly reduce the volume of the boiler under the condition of same energy output, and simultaneously reduces the power consumption of each device such as a fan and the like.

(2) The utility model discloses in, the connected mode of horizontal alloy board and vertical alloy board can be the same or different, and can be linear arrangement or echelonment respectively and arrange, and the implementation mode is various, has improved the utility model discloses a practicality, suitability and application scope satisfy different customer demands.

(3) The utility model discloses in, through the cooperation of spout and hasp portion, improved greatly the utility model discloses an assembly efficiency to shorten the required time limit for a project that the net was built.

(4) The utility model discloses in, vertical alloy board also realizes welding connection between them through the welding through-hole with the furnace inner wall, connects reliably, has reduced the fault rate of vertical alloy board.

(5) The utility model discloses in, the transition wall has guaranteed that horizontal alloy board and furnace inner wall have certain clearance to wash away the solid particle that can flow to furnace's below in this clearance at horizontal alloy board, make piling up on this horizontal alloy board as few as possible of solid particle, effectively avoided piling up on horizontal alloy board solid particle is next washing away the process and producing a large amount of raise dusts, thereby reach dust fall, dust removal effect. And better, the transverse alloy plate is in clearance fit with the inner wall of the hearth, so that the adaptability of the fit of the transverse alloy plate and the inner wall of the hearth is improved, and the tolerance of the fit error of the transverse alloy plate and the inner wall of the hearth is improved.

(6) The utility model discloses in, the setting up of hook has improved the reliability and the steadiness that diaphragm type wall and diaphragm type wall pipe are connected greatly, simultaneously, because the hook will be protruding in diaphragm type wall pipe inwards, consequently the hook has similar net protection machanism isodynamic (reduces the fluid velocity of flow, slows down the friction and/or the impact of fluid and boiler inner wall).

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural view of an embodiment of an air outlet inner wall of the present invention;

FIG. 3 is a schematic view of a portion A of FIG. 2;

FIG. 4 is a schematic cross-sectional view of FIG. 3;

fig. 5 is a schematic structural view of an embodiment of the inner wall of the present invention;

FIG. 6 is a schematic diagram of an embodiment of the transition region of FIG. 5;

FIG. 7 is a schematic diagram of one embodiment of the dense phase zone of FIG. 5;

FIG. 8 is a schematic structural view of an embodiment of a longitudinal alloy plate according to the present invention;

FIG. 9 is a schematic structural view of another embodiment of a longitudinal alloy plate according to the present invention;

FIG. 10 is a schematic structural view of an embodiment of a transverse alloy plate according to the present invention;

FIG. 11 is a front view structural schematic of FIG. 9;

FIG. 12 is a bottom view of the structure of FIG. 9;

FIG. 13 is a right side view schematic of the structure of FIG. 9;

FIG. 14 is a rear view structural schematic of FIG. 9;

FIG. 15 is a schematic structural view of an embodiment of a welding connection between a transverse alloy plate and an inner wall of the present invention;

FIG. 16 is a bottom view of FIG. 14;

fig. 17 is a schematic structural view of another embodiment of a longitudinal alloy plate according to the present invention;

FIG. 18 is a rear view structural schematic of FIG. 16;

FIG. 19 is a schematic structural view of one embodiment of the longitudinal alloy plate of FIG. 16 welded to the membrane wall;

FIG. 20 is a schematic structural view of another embodiment of a transverse alloy plate welded to an inner wall according to the present invention;

fig. 21 is a schematic structural view of an embodiment of the platen superheater of the present invention.

In all the figures, the same reference numerals denote the same features, in particular: 1-transverse alloy plate, 11-first side wall, 111-matching wall, 112-first matching wall, 113-second matching wall, 114-third matching wall, 115-arc wall, 116-transition wall, 117-welding side wall, 118-welding through hole, 119-linear transition, 12-second side wall, 121-circulation groove, 13-third side wall, 14-fourth side wall, 151-supporting part, 152-buckling part, 153-buckling groove, 154-buckling part, 155-sliding groove, 161-buckling column part, 162-butting part, 171-bulge, 2-longitudinal alloy plate, 21-fifth side wall, 22-sixth side wall, 23-seventh side wall, 24-eighth side wall, 31-membrane wall pipe, 32-membrane wall pipe, 33-hook claw, 41-wear-resistant layer, 42-fire-resistant heat conduction layer, 5-boiler body, 51-side wall, 511-air outlet inner wall, 512-air outlet, 513-exhaust pipeline, 52-top plate, 53-bottom plate, 54-dilute phase region, 55-transition region, 56-dense phase region, 561-burner, 57-air chamber, 571-first air supply mechanism, 572-second air supply mechanism, 58-air distribution mechanism, 6-cyclone separator, 61-feed back pipeline, 7-convection flue, 71-heat exchanger, 81-coal supply mechanism, 82-slag supply mechanism, 91-screen superheater, 911-water cooling pipe, 912-claw nail, 92-reinforcement cage, 921-transverse reinforcement and 922-longitudinal reinforcement.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

In an embodiment of the present invention, as shown in fig. 1 to 9, a high efficiency heat exchange circulating fluidized bed boiler comprises: a boiler body 5 and a grid deceleration mechanism; the boiler body 5 comprises a top plate 52, a bottom plate 53 and side walls 51; the top plate 52 is arranged opposite to the bottom plate 53, and the top plate 52 is arranged above the bottom plate 53; the upper end of the side wall 51 is connected with the top plate 52, and the lower end of the side wall 51 is connected with the bottom plate 53; the inner wall of the side wall 51 is formed by sequentially and hermetically connecting the film-type wall pipe 31 and the film-type wall 32 in the circumferential direction, and part of the pipe wall of the film-type wall pipe 31 protrudes inwards from the film-type wall 32 in the radial direction; the boiler body 5 sequentially comprises a dilute phase zone 54 and a dense phase zone 56 from top to bottom along the height direction of the boiler body; an air outlet 512 communicated with the cyclone separator 6 is arranged on the side wall 51 of the dilute phase region 54, and an air outlet inner wall 511 is formed by winding the inner wall of the air outlet 512; the grid speed reduction mechanism comprises alloy plates, wherein the alloy plates comprise a transverse alloy plate 1 and a longitudinal alloy plate 2; the first side walls 11 of the transverse alloy plates 1 are recessed at intervals to form more than one matching wall 111, the parts of the first side walls 11 which are not recessed to form the matching walls 111 form welding side walls 117 used for being welded with the membrane type walls 32, the welding side walls 117 are recessed to form more than one welding through hole wall, and the welding through hole walls are surrounded to form welding through holes 118; the third side wall 13 of the transverse alloy plate 1 and the fourth side wall 14 of the transverse alloy plate 1 are oppositely arranged; a first connecting part is arranged on one side, close to the third side wall 13, of the transverse alloy plate 1; a second connecting part is arranged on one side, close to the fourth side wall 14, of the transverse alloy plate 1; the first connecting part and the second connecting part are suitable for realizing the connection of the two transverse alloy plates 1; the transverse alloy plates 1 are connected with the membrane wall 32 in a welding mode through the welding through holes 118, so that more than one transverse alloy plates 1 are sequentially spliced end to form a transverse speed reducing belt, and the matching wall 111 surrounds the outer side of the membrane wall pipe 31; the side wall of the longitudinal alloy plate 2 is welded and connected with the membrane wall 32 along the height direction, so that more than one longitudinal alloy plate 2 are sequentially spliced end to form a longitudinal deceleration strip, and the longitudinal deceleration strip and the transverse deceleration strip are arranged in a grid shape; the inner air outlet wall 511 is provided with a grid speed reduction mechanism; the inner wall of the dense-phase zone 56 is provided with a grid speed reduction mechanism, and the grid speed reduction mechanism of the dense-phase zone 56 is covered with a refractory heat-conducting layer 42; and a grid deceleration mechanism is arranged on the inner wall of the dilute phase area 54.

It will be appreciated that the grid deceleration mechanism may be comprised of only transverse deceleration strips, only longitudinal deceleration strips, both transverse and longitudinal deceleration strips (including combinations of transverse and transverse deceleration strips and longitudinal deceleration strips and both transverse and longitudinal deceleration strips), or both transverse and longitudinal deceleration strips. Optionally, the air outlet inner wall 511 is provided with a transverse deceleration strip and a longitudinal deceleration strip at the same time, so that abrasion (impact abrasion, cutting abrasion and contact fatigue abrasion) caused by the eddy phenomenon and the rapid upward flow of the fluid of the air outlet inner wall 511 is well solved, the air outlet inner wall 511 is protected, and the service life of the air outlet inner wall is prolonged; the inner wall of the dense-phase area 56 is provided with a transverse velocity reduction zone or consists of the transverse velocity reduction zone and a longitudinal velocity reduction zone, so that the abrasion of the dense-phase area 56 caused by turbulence phenomena caused by upward and downward flowing of fluid and wind supplied by solid particles due to the fluid flowing up and down and the side wall 51 is well solved, meanwhile, the fireproof performance of the grid velocity reduction mechanism is further improved through the fireproof heat conduction layer 42, the heat conduction performance of the grid velocity reduction mechanism is ensured, the amplitude reduction of the heat exchange performance of the inner wall of the dense-phase area 56 is smaller, and the fireproof performance and higher heat exchange rate of the dense-phase area 56 are ensured to the greatest extent; the inner wall of the dilute phase zone 54 is provided with a transverse deceleration strip or consists of the transverse deceleration strip and a longitudinal deceleration strip together, so that the abrasion of the dilute phase zone 54 mainly caused by the upward or downward flow of fluid is well solved; to sum up, the utility model discloses to realized that the pertinence abrasionproof of boiler flow property, fire-resistant, heat transfer, heat conduction have improved the operating performance of boiler greatly. It is worth to say that the transverse alloy plate 1 and the longitudinal alloy plate 2 may have the same structure, the only difference being that the longitudinal alloy plate 2 does not need to be provided with the matching wall 111 corresponding to the film-type wall tube 31; of course, the transverse alloy plate 1 and the longitudinal alloy plate 2 may have different structures. And when horizontal deceleration area and vertical deceleration area intersect, vertical deceleration area can be dodged to horizontal deceleration area, and horizontal deceleration area can also be dodged to vertical deceleration area, specifically sets up according to the actual construction condition.

It can be understood that the fire-resistant heat-conducting layer 42 is a covering layer having fire resistance and good heat-conducting property, such as a concrete layer containing more than one fire-resistant heat-conducting material, such as graphite, silicon carbide, corundum, etc. Of course, the heat-resistant layer 42 may also be composed of a heat-resistant layer and a heat-conducting layer in this order from the inside to the outside in the radial direction. The combination of the grid slowing mechanism and the refractory layer 42. In practical application, the speed reducing belt (transverse speed reducing belt or longitudinal speed reducing belt) is formed by splicing more than one alloy plate end to end, the speed reducing belt can be arranged linearly or in a step shape, for example, when more than one alloy plate is arranged in the same direction in a flush mode, the speed reducing belt is arranged linearly (as shown in figures 3-5), when more than two alloy plates are overlapped in the same direction and are overlapped in the other direction, the speed reducing belt is arranged in a step shape, of course, the speed reducing belt can also be arranged in an inclined mode, as long as the speed reduction of solid particles can be achieved to protect the inner wall of the boiler. The speed reducing belts of the inner walls of different sides of the boiler body 5 can be arranged flush or not, and the number, the intervals and the like of the speed reducing belts arranged on the inner walls of each side can be arranged according to actual needs.

In practical applications, the central angle of the fitting wall 111 can be set according to the central angle occupied by the portion of the film-wall tube 31 protruding from the film wall 32 in the applicable boiler, and when the central angle of one fitting wall 111 can be not less than the central angle of the film-wall tube 31, the one fitting wall 111 can be independently arranged around the periphery of one film-wall tube 31; when the central angle of one mating wall 111 is smaller than that of the membrane-wall tube 31, the mating wall 111 may be disposed around the periphery of the membrane-wall tube 31 together with the mating wall 111 of another transverse alloy plate 1 disposed adjacent to the mating wall 111.

Therefore, the central angle of the matching wall 111 may be equal to 180 °, greater than 180 ° or less than 180 °, and may be set according to the actual situation of the membrane wall tube 31, which is not described herein again. It will be understood that each transversal alloy plate 1 is provided with at least one mating wall 111 and one through welding hole 118. When each transverse alloy plate 1 is provided with one matching wall 111 and two welding side walls 117 (at this time, the two welding side walls 117 are respectively arranged at two sides of the matching wall 111), both the two welding side walls 117 may be provided with welding through holes 118, one of the welding side walls 117 may be provided with welding through holes 118, one welding side wall 117 may be provided with more than one welding through hole 118 at intervals, and one welding through hole 118 may be provided with more than one welding rod. Similarly, when each transverse alloy plate 1 is provided with more than two matching walls 111 and more than one welding side wall 117, more than one welding through hole 118 can be arranged at intervals on one welding side wall 117, more than one welding rod can be arranged on one welding through hole 118, the central angles of the matching walls 111 can be the same or different, and optionally, the welding through holes 118 preferably penetrate through the transverse alloy plate 1. Of course, the weld through-hole 118 may also be a counterbore configuration. It will be appreciated that the purpose of the mating wall 111 is to give way to the membrane wall tube 31 to effect welding of the welding side wall 117 to the membrane wall 32. Therefore, the outer contour of the matching wall 111 can be a smooth curve (e.g. arc, U-shape) or a non-smooth curve (polygon, such as more than one quadrangle, triangle, arc, five-deformation connected in sequence, etc.), and optionally, the connection line of the part of the matching wall 111 closest to the membrane wall tube 31 forms an approximate arc structure, preferably approximating the shape of the arc wall surface of the membrane wall tube 31 as much as possible. And two horizontal alloy boards 1 that adjacent set up in the horizontal deceleration area can partly fold and establish, dock or be a determining deviation and arrange, should all belong to the utility model discloses a protection scope.

Optionally, each mating wall 111 is fitted to a membrane-wall tube 31, i.e. one mating wall 111 is arranged around the outside of a membrane-wall tube 31.

Optionally, the mating walls 111 are recessed to form more than one transition wall 116. The setting of transition wall 116 has guaranteed that there is the clearance (no matter cooperation wall 111 and diaphragm type wall pipe 31 are sealed laminating or clearance fit) between cooperation wall 111 and the diaphragm type wall pipe 31 to make the alloy board can not pile up solid particle when the inner wall of protection boiler, effectively avoid solid particle because of pile up on the alloy board produce the raise dust phenomenon in next scouring, thereby reach dust fall and dust removal effect. It will be appreciated that two or more transition walls 116 of a mating wall 111 may or may not be in communication in sequence, and when two or more transition walls 116 of a mating wall 111 are not in communication, the portions of the mating wall 111 that are not recessed to form the transition walls 116 will form the arcuate walls 115 that conform to the membrane wall tube 31. The transition wall 116 may be contoured in an arcuate or irregular shape.

Alternatively, the side wall of the alloy plate on the side away from the membrane wall 32 is recessed at intervals to form more than one flow channel 121. Namely, the second side wall 12 of the transverse alloy plate 1 is provided with a circulating groove 121, and the second side wall 12 is arranged opposite to the first side wall 11; the eighth side wall 24 of the longitudinal alloy plate 2 is provided with a circulating groove 121, the eighth side wall 24 and the seventh side wall 23 are arranged oppositely, and the seventh side wall 23 of the longitudinal alloy plate 2 is connected with the membrane wall 32 in a welding mode. The setting of circulation groove 121 is when guaranteeing the abrasionproof effect of alloy board, and the solid particle of still being convenient for is through its circulation, effectively avoids solid particle in the piling up of alloy board, simultaneously, reduces the washing away that alloy board self received, protects the alloy board and prolongs its life. In practical applications, the diameter of the flow-through groove 121 is preferably not more than one third of the dimension of the alloy plate 1 in the radial direction to ensure the structural strength of the alloy plate. Preferably, the flow channels 121 of the transverse alloy plate 1 are arranged opposite the membrane wall 32. Optionally, the seventh side wall 23 of the longitudinal alloy plate 2 is recessed at intervals to form more than one welding through hole 118, and the longitudinal alloy plate 2 is welded with the membrane wall 32 through the welding through holes 118.

Optionally, a transition zone 55 is provided between the dilute phase zone 54 and the dense phase zone 56, and the inner wall of the transition zone 55 is sprayed with the heat-conducting refractory layer 42 to meet the high-temperature and high-speed working condition of the transition zone 55.

Alternatively, the diaphragm wall 32 of the air outlet inner wall 511 is provided with a hook 33, one end of the hook 33 is welded to the diaphragm wall 32, and the other end of the hook 33 extends to the diaphragm wall tube 31, so that the hook 33 is enclosed outside the diaphragm wall tube 31. Optionally, the hooks 33 are arranged in pairs, and include a first hook and a second hook, a film wall 32 is disposed between two film wall pipes 31 disposed adjacently, the two film wall pipes 31 are a first film wall pipe and a second film wall pipe, the end portions of the first hook and the second hook near one side of the film wall 32 are welded or integrally formed with the film wall 32, the other end of the first hook winds the first film wall pipe disposed in the two film wall pipes 31 disposed adjacently, the other end of the second hook winds the second film wall pipe disposed in the two film wall pipes 31 disposed adjacently, the first hook is disposed near one side of the first film wall pipe, and the second hook is disposed near one side of the second film wall pipe. In practical application, the ends of the first and second hooks near the film wall 32 may be integrally formed, that is, the first and second hooks are Y-shaped, in order to facilitate the hooks 33 to wind the film wall 31, the hooks 33 may be selected as deformation members, and after one end of the hooks 33 is welded to the film wall 32, the other end of the hooks 33 may be bent to wind the film wall 31 to fix the film wall 31. Of course, the first and second fingers may be arranged independently of each other such that a certain distance is formed between the first and second fingers, and the longitudinal alloy plate 2 may be welded to the membrane wall 32 arranged between the first and second fingers. Of course, the longitudinal alloy plate 2 can also be welded with the hooks 33 to form a longitudinal speed-reducing belt.

Optionally, more than one lateral deceleration strip is carried above the fingers 33. In practical applications, the hooks 33 are spaced apart in the height direction, so that each membrane-wall tube 31 is provided with a plurality of hooks 33 in the height direction. The wear-resistant layer 41 covers the area of the air outlet inner wall 511 close to one side of the air outlet 512;

optionally, an air chamber 57 is arranged below the dense-phase zone 56, an air distribution mechanism 58 is arranged between the air chamber 57 and the dense-phase zone 56, the air chamber 57 is provided with a primary air supply pipeline, one end of the primary air supply pipeline is communicated with the first air supply mechanism 571, and the other end of the primary air supply pipeline is communicated with the air chamber 57; the dense-phase zone 56 is provided with a burner 561, a secondary air supply pipeline, a coal supply pipeline and a slag supply pipeline; the burner 561 is arranged above the air distribution mechanism 58, one end of the secondary air supply pipeline is communicated with the dense-phase area 56, and the other end of the secondary air supply pipeline is communicated with the second air supply mechanism 572; one end of the coal conveying pipeline is communicated with the dense-phase area 56, and the other end of the coal conveying pipeline is communicated with the coal conveying mechanism 81; one end of the slag conveying pipeline is communicated with the dense-phase region 56, and the other end of the slag conveying pipeline is communicated with the slag conveying mechanism 82; the slag conveying pipeline is arranged above the coal conveying pipeline, and the coal conveying pipeline is arranged above the secondary air supply pipeline; the air outlet 512 is communicated with the inlet of the cyclone separator 6 through an exhaust duct 513, the bottom of the cyclone separator 6 is communicated with the dense phase region 56 through a return pipe 61, the outlet of the cyclone separator 6 is communicated with the inlet of the convection flue 7, more than one group of heat exchangers 71 are arranged in the convection flue 7, and the outlet of the convection flue 7 is communicated with a chimney for discharging or is discharged after being treated. The recycling of solid particles is realized through the cyclone separator 6, secondary heat exchange is realized through the convection flue 7 and the heat exchanger 71, and the heat exchange efficiency is further improved.

Optionally, the fifth side wall 21 of the longitudinal alloy plate 2 and the sixth side wall 22 of the longitudinal alloy plate 2 are oppositely arranged; the fifth side wall 21 is provided with a first connecting portion, and the sixth side wall 22 is provided with a second connecting portion, so that the connection of more than two longitudinal alloy plates 2 in the height direction is realized. Optionally, the first connecting portion and the second connecting portion are in concave-convex fit along the direction in which the speed reducing belt is formed, illustratively, the first connecting portion is a groove formed by inward concave of the side wall of the alloy plate, the second connecting portion is a protrusion 171 formed by outward convex of the side wall of the alloy plate, and the protrusion 171 is matched with the groove, so that the alloy plates are linearly connected, and the speed reducing belt is linearly arranged.

In another embodiment of the present invention, as shown in fig. 10-16, different from the above embodiment, the first sidewall 11 of the present embodiment is provided with three or more fitting walls 111 at intervals, including a first fitting wall 112, one or more second fitting walls 113, and a third fitting wall 114; the second mating wall 113 forms an arc that fits a diaphragm wall tube 31; the first mating wall 112 and the third mating wall 114 are joined together to form an arc adapted to a diaphragm wall tube 31, and the first mating wall 112 and the third mating wall 114 are disposed on both sides of all the second mating walls 113. It can be understood that the first mating wall 112 and the third mating wall 114 may be circular arcs matched with one membrane wall tube 31 after the sidewalls are butted with each other along the radial direction of the membrane wall tube 31, that is, two adjacent transverse alloy plates 1 are transversely and horizontally arranged, and are spliced end to end. The first matching wall 112 and the third matching wall 114 may also jointly form an arc adapted to one membrane-type wall tube 31 after overlapping along the axial direction of the membrane-type wall tube 31, that is, two adjacent transverse alloy plates 1 are overlapped along the axial direction of the membrane-type wall tube 31 to form a step-shaped arrangement, so that the first matching wall 112 and the third matching wall 114, which are adjacently disposed and respectively located on different transverse alloy plates 1, are partially overlapped (as shown in fig. 7) at positions close to each other and jointly form an arc enclosed outside one membrane-type wall tube 31. In practical applications, the central angles of the first and

third mating walls

112 and 114 may be the same or different; optionally, the central angles of the first and

third mating walls

112 and 114 are not less than 90 ° and not more than 180 °.

Optionally, the mating wall 111 and the welding sidewall 117 are chamfered, and the chamfer may be a right angle chamfer (i.e., a straight transition 119) or an arc chamfer.

In another embodiment of the present invention, different from the above embodiments, the matching wall 111 and the welding sidewall 117 of the present embodiment are in a concave transition.

In another embodiment of the present invention, as shown in fig. 10 to 19, unlike any one of the above embodiments, the first connection portion of the present embodiment is formed by a plate surface protrusion of an alloy plate, and includes a support portion 151 and a fastening portion 152, one end of the support portion 151 is connected to the alloy plate, and the other end of the support portion 151 is connected to the fastening portion 152; the second connecting portion is a locking slot 153 connected with the locking portion 152 in a locking manner. Optionally, the position of the alloy plate corresponding to the buckling part 152 is concave to form a sliding groove 155; the alloy plate is provided with a sliding buckle part 154 which is connected with the sliding groove 155 in a sliding way; the sliding buckle part 154 and the clamping groove 153 are respectively arranged on two plate surfaces of the alloy plate. The alloy plates are arranged in a step shape through the matching of the clamping part 152 and the clamping groove 153. For convenience of description, the two adjacent alloy plates are respectively a first alloy plate and a second alloy plate, and the clamping groove 153 of the first alloy plate and the clamping part 152 of the second alloy plate are assembled in a pre-tightening manner, and since the end part of the first alloy plate close to the fourth side wall 14 (or the sixth side wall 22) is overlapped between the clamping part 152 of the second alloy plate and the end part of the second alloy plate close to the third side wall 13 (or the fifth side wall 21), the distance between the clamping part 152 and the second alloy plate is set to the plate thickness of the alloy plates, so that the first alloy plate is clamped between the clamping part 152 of the second alloy plate and the clamping part 152 of the second alloy plate, and the connection strength of the first alloy plate and the second alloy plate is improved. The sliding buckle part 154 and the sliding groove 155 not only play roles in positioning and limiting the first alloy plate and the second alloy plate which are adjacently arranged, so that the first alloy plate and the second alloy plate are more conveniently assembled, but also ensure the connection strength of the first alloy plate and the second alloy plate through the matching of the sliding buckle part 154 and the sliding groove 155, so that in practical application, even if any one of the first alloy plate and the second alloy plate is separated from the membrane wall 32, the other alloy plate can be clamped by the matching of the clamping part 152 and the clamping groove 153, and the clamping part 152 and the alloy plate to ensure the integrity of a grid, and further realize the connection reinforcement and limiting of the first alloy plate and the second alloy plate through the matching of the sliding buckle part 154 and the sliding groove 155. Alternatively, the slider portion 154 is formed by an alloy plate protrusion, and the outer contour of the slider portion 154 may be arc-shaped or square-shaped.

Alternatively, the seventh side wall 23 of the longitudinal alloy plate 2 is welded with the membrane wall 32, the part of the seventh side wall 23 which is not welded with the membrane wall 32 is recessed to form more than one avoiding groove, when the longitudinal alloy plate 2 and the transverse alloy plate 1 have the same structure, the avoiding groove of the longitudinal alloy plate 2 is recessed from the matching wall 111, and only the avoiding groove of the longitudinal alloy plate 2 is not directed to the membrane wall pipe 31 but directed to the membrane wall 32. Because both sides of the film-type wall 32 are the film-type wall 31, and the film-type wall 31 protrudes inward from the film-type wall 32, the blocking effect of the film-type wall 31 makes the part of the longitudinal alloy plate 2 close to one side of the film-type wall 32 have no anti-wear effect, so the rest part of the seventh side wall 23 except the welded side wall 117 does not contact with the film-type wall 32, the size of the avoiding groove in the radial direction may not be smaller than zero and smaller than the size of the film-type wall 31 protruding from the film-type wall 32, of course, the size of the avoiding groove in the radial direction may also be slightly larger than the size of the film-type wall 31 protruding from the film-type wall 32, for example, the distance between the matching wall 111 and the film-type wall 31 is 0-1. The contact area between the longitudinal alloy plate 2 and the membrane wall 32 is greatly reduced due to the arrangement of the avoiding groove, so that the probability of contact interference between the longitudinal alloy plate 2 and the membrane wall 32 is reduced (for example, the membrane wall 32 cannot be completely attached to the longitudinal alloy plate 2 due to phenomena such as bulging or abrasion and the like of the membrane wall 32, the welding effect is influenced), and the welding reliability of the longitudinal alloy plate 2 and the membrane wall 32 is ensured. Preferably, the weight of the longitudinal alloy plate 2 can be reduced by arranging the avoiding groove.

In another embodiment of the present invention, different from the above embodiments, the locking portion 152 is coupled to the supporting portion 151.

In another embodiment of the present invention, different from the above embodiments, the locking portion 152 and the supporting portion 151 are smoothly transited and integrally formed.

In another embodiment of the present invention, as shown in fig. 20, different from the above embodiment, the first connecting portion of the present embodiment is formed by a plate surface protrusion of an alloy plate, and includes a clamping column portion 161 and an abutting portion 162, one end of the clamping column portion 161 is connected to the alloy plate, and the other end of the clamping column portion 161 is connected to the abutting portion 162; the second connecting part is a hook groove formed by inward concave of the alloy plate; the clamping column part 161 slides to the hook groove and is matched with the groove, so that more than two alloy plates are arranged in a step shape.

In another embodiment of the present invention, different from the above embodiments, the first connecting portion and the second connecting portion are connecting holes, and a connecting member realizes connection of the two alloy plates by sequentially passing through the first connecting hole and the second connecting hole and by screwing the first connecting hole and the second connecting hole.

In another embodiment of the present invention, different from the above embodiments, the first connecting portion and the second connecting portion are positioning holes, and a positioning pin member sequentially penetrates through the first connecting hole and the second connecting hole to connect the two alloy plates.

In another embodiment of the present invention, different from the above embodiments, the first connection portion and the second connection portion are through holes, and a stud is connected to the two alloy plates by penetrating through the first connection hole and the second connection hole in sequence and then connecting both ends of the stud to a nut.

In another embodiment of the present invention, as shown in fig. 21, on the basis of any of the above embodiments, the dilute phase area 54 is provided with a superheater 91, and the outer sidewall of the superheater 91 is provided with one or more protective shields formed by laying the vertical alloy plates 2. It can be understood that when the longitudinal alloy plate 2 can be linearly or step-shaped arranged on the outer peripheral side of the water cooling tube 911 on the outermost side of the platen superheater 91, the longitudinal alloy plate 2 can be directly welded with the water cooling tube 911; or welded with a claw nail 912 arranged on the water-cooling tube 911; or after being welded with the reinforcement cage 92, the reinforcement cage 92 is welded with the water-cooled tube 911 or the claw nail 912, and at the moment, the longitudinal alloy plate 2 can be welded with the reinforcement cage 92 through the welding through hole 118 or directly contacted and welded with the reinforcement cage 92; certainly, the longitudinal alloy plate 2 can be supported in the reinforcement cage 92, and the longitudinal alloy plate 2 is wound on the outer side wall of the platen superheater 91 (i.e. the water cooling tube 911 on the outer peripheral side of the platen superheater 91 is formed) by welding the reinforcement cage 92 and the water cooling tube 911, so that the reinforcement cage 92 comprises the transverse steel bars 921 and the longitudinal steel bars 922, and the transverse steel bars 921 and the longitudinal steel bars 922 are arranged in a grid shape and welded, so that the longitudinal alloy plate 2 is held; the longitudinal alloy plate 2 can also realize the connection between itself and the water cooling tubes 911 by arranging an anchor ear matched with the water cooling tubes 911 on the outermost side of the screen superheater 91, and the like. Through the water-cooled tube 911 that protection shield over heater 91 most easily received the fluid and assaulted, make the over heater of shielding need not to cover wearing layer 41, the over heater of shielding can't realize the fine quilt of heat transfer problem because of the 41 influences of wearing layer is solved, has improved the utility model discloses a heat exchange efficiency.

It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.

Claims

1. A high efficiency heat exchange circulating fluidized bed boiler, comprising:

the boiler comprises a boiler body and a grid deceleration mechanism;

the inner wall of the air outlet is provided with the grid deceleration mechanism;

the inner wall of the dense-phase area is provided with the grid speed reduction mechanism, and the grid speed reduction mechanism in the dense-phase area is covered with a fireproof heat conduction layer;

and the inner wall of the dilute phase area is provided with the grid deceleration mechanism.

2. The high efficiency heat exchange circulating fluidized bed boiler of claim 1, wherein:

the first connecting part is formed by protruding the surface of the alloy plate and comprises a supporting part and a clamping part, one end of the supporting part is connected with the alloy plate, and the other end of the supporting part is connected with the clamping part;

the second connecting part is a clamping groove connected with the clamping part in a buckling mode.

3. The high efficiency heat exchange circulating fluidized bed boiler of claim 2, wherein:

the alloy plate is recessed in a position corresponding to the buckling part to form a sliding groove;

the alloy plate is provided with a sliding buckle part which is in sliding connection with the sliding chute;

the sliding buckle part and the clamping groove are respectively arranged on two plate surfaces of the alloy plate.

4. The high efficiency heat exchange circulating fluidized bed boiler of claim 1, wherein:

the first connecting part is formed by protruding the surface of the alloy plate and comprises a clamping column part and a butting part, one end of the clamping column part is connected with the alloy plate, and the other end of the clamping column part is connected with the butting part;

the second connecting part is a hook groove formed by inwards concave alloy plates;

the clamping column part slides to the hook groove, so that more than two alloy plates are arranged in a step shape.

5. The high efficiency heat exchange circulating fluidized bed boiler of any one of claims 1-4, wherein:

the fifth side wall of the longitudinal alloy plate and the sixth side wall of the longitudinal alloy plate are oppositely arranged; the fifth side wall is provided with the first connecting portion, and the sixth side wall is provided with the second connecting portion, so that the longitudinal alloy plates are connected in the height direction.

6. The high efficiency heat exchange circulating fluidized bed boiler of any one of claims 1-4, wherein:

the first side wall is provided with more than three matching walls at intervals, and the matching walls comprise a first matching wall, more than one second matching wall and a third matching wall;

the second matching wall forms an arc matched with the membrane wall pipe;

the first matching wall and the third matching wall are spliced together to form an arc matched with the membrane wall pipe, and the first matching wall and the third matching wall are respectively arranged on two sides of all the second matching walls.

7. The high efficiency heat exchange circulating fluidized bed boiler of any one of claims 1-4, wherein:

the mating walls are spaced apart and recessed to form more than one transition wall.

8. The high efficiency heat exchange circulating fluidized bed boiler of any one of claims 1-4, wherein:

the seventh side wall of the longitudinal alloy plate is recessed at intervals to form more than one welding through hole, and the longitudinal alloy plate is welded with the membrane wall through the welding through holes; and/or the presence of a gas in the gas,

and the seventh side wall of the longitudinal alloy plate is welded with the membrane wall, and the part of the seventh side wall, which is not welded with the membrane wall, is recessed to form more than one avoidance groove.

9. The high efficiency heat exchange circulating fluidized bed boiler of any one of claims 1-4, wherein:

the side wall of the alloy plate far away from one side of the membrane wall is recessed at intervals to form more than one circulation groove.

10. The high efficiency heat exchange circulating fluidized bed boiler of any one of claims 1-4, wherein:

and the dilute phase area is provided with a superheater screen, and the outer side wall of the superheater screen is provided with more than one layer of protective shield formed by laying the longitudinal alloy plate.