CN210511742U

CN210511742U - Front smoke box structure of central back-burning boiler in plateau area

Info

Publication number: CN210511742U
Application number: CN201921169823.1U
Authority: CN
Inventors: 边献福; 李晓红; 郭永谦
Original assignee: Qinghai Ruida Industry And Trade Co ltd; Qinghai University
Current assignee: Qinghai Ruida Industry And Trade Co ltd; Qinghai University
Priority date: 2019-07-24
Filing date: 2019-07-24
Publication date: 2020-05-12
Anticipated expiration: 2029-07-24

Abstract

The utility model discloses a preceding smoke box structure of high place district center backfire boiler, include the smoke box body seal structure of four lamella types that are axisymmetric distribution around the burning head, every all be equipped with heat preservation and flame retardant coating in the smoke box body seal structure frame in proper order, preceding smoke box closing plate still is equipped with preceding smoke box extranal packing panel outward, and smoke box body bottom still communicates there is the comdenstion water to let out the pipe. The utility model discloses simple structure is pleasing to the eye, and the sealed apron of four lamella type structures is not only rigidity strong, is difficult for taking place to warp, and is sealed effectual, and maintenance is convenient moreover, in case take place the flue gas and reveal, only need reveal corresponding position open certain closing plate can. The four heat-insulating layers and the fire-resistant layer in the sealing structure frame of the smoke box body effectively play double effects of high temperature resistance and heat preservation.

Description

Front smoke box structure of central back-burning boiler in plateau area

Technical Field

The utility model relates to a heating equipment technical field especially relates to a front smoke box structure of boiler is fired back at plateau district center.

Background

In plateau areas, due to high altitude, the oxygen content is low compared with the conventional level, and a central back-burning boiler in the plateau areas is designed for the purpose of full combustion of fuel and the maximum effective heat absorption of a boiler body. Most of central back-burning boilers comprise a boiler shell, an annular water jacket is arranged on the inner wall of the boiler shell, a front smoke box and a rear smoke box are respectively arranged at the front end and the rear end of the annular water jacket, a furnace liner and a back-burning chamber are also arranged inside the annular water jacket, and the back-burning chamber is respectively communicated with the front smoke box and the rear smoke box through smoke pipes. Therefore, the front smoke box is an important part for collecting and dispersing heat in the series flow process, and the reliable sealing performance and the manufacturing quality of the front smoke box directly influence the economical and safe operation of the boiler. Particularly, nitrogen oxides generated by high-temperature combustion of natural gas, carbon oxides generated by incomplete combustion and the like are important indexes for environmental control, and once leakage occurs due to sealing failure, the economic and safe operation of the boiler is affected.

In order to keep the appearance of the boiler clean and tidy and simultaneously keep the temperature, the front smoke box and the burner are usually installed into a whole, a heat preservation and insulation layer is arranged in the front smoke box, the inner surface of the front smoke box directly bears flame radiation and the scouring of high-temperature smoke at 950-1200 ℃, if the heat preservation and insulation performance of the front smoke box is poor, the outer surface temperature of the front smoke box is too high, heat dissipation loss is increased, the heat efficiency of the boiler is reduced, and scalding accidents are possibly caused. The existing front smoke box is mostly integrated or two-piece type, a sealing plate of the front smoke box is easy to deform due to uneven stress, so that sealing failure is caused, and once a furnace body generates smoke leakage, a sealing cover needs to be integrally removed for maintenance.

Disclosure of Invention

To the problem that exists, the utility model aims at providing a simple structure, sealed effectual, the convenient maintenance's plateau district center backfire boiler's preceding smoke box structure.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a preceding smoke box structure of boiler is fired back at plateau district center which characterized in that: a circular combustion head is arranged at the center of one end of the front cigarette box body, a hole-shaped plate is arranged around the combustion head, the hole-shaped plate is divided into four axisymmetric hole-shaped grooves by four partition plates which are symmetrical up and down, left and right, a front cigarette box sealing plate capable of being sealed with the hole-shaped plate is arranged outside each hole-shaped groove, a fire-resistant layer is arranged between each hole-shaped groove and the front cigarette box sealing plate, each front cigarette box sealing plate is in open-close connection with the front cigarette box body, and a front cigarette box outer packaging panel is arranged outside each front cigarette box sealing plate; a heat-insulating layer is arranged between the front smoke box sealing plate and the front smoke box outer packaging panel, and the bottom of the front smoke box body is communicated with a condensed water discharge pipe; the upper part of the combustion head is provided with a fire observation hole.

Furthermore, the front smoke box sealing plate comprises a front smoke box sealing door plate and a sealing device, the sealing device comprises an annular sealing surface supporting plate and two sealing rings, the annular sealing surface supporting plate is fixedly arranged on the front smoke box sealing door plate, and the sealing rings are a front smoke box inner sealing ring arranged on the inner side of the sealing surface supporting plate and a front smoke box outer sealing ring arranged on the outer side of the sealing surface supporting plate respectively.

Furthermore, fire-resistant layers are respectively arranged outside the front smoke box body and the combustion head, and a heat-insulating layer is arranged between the two fire-resistant layers.

Furthermore, preceding smoke box extranal packing panel includes extranal packing flat head and heat preservation iron sheet, heat preservation iron sheet with between the preceding smoke box body outside-in also be equipped with heat preservation and flame retardant coating in proper order.

Furthermore, two openings are designed in the middle of the outer packing flat head and respectively correspond to the combustion head and the fire observation holes one by one, and a nameplate is further arranged on the outer packing flat head.

The utility model has the advantages that: compared with the prior art, the utility model has the improvement that,

1. the front smoke box body adopts four axisymmetric hole-shaped structures, and the four holes are respectively provided with the sealing plates, so that the rigidity of the front smoke box body is superior to that of a whole block type structure and a two-piece structure, and the sealing failure caused by deformation due to insufficient integral rigidity can be avoided;

2. the maintenance is convenient and quick, once the flue gas leakage occurs to the furnace body, the whole furnace body does not need to be dismantled, and only the sealing plate needs to be opened at the position corresponding to the leakage;

3. the sealing plate is also provided with an outer packing panel, a fire-resistant layer is arranged between the porous structure and the sealing plate, and a heat-insulating layer is arranged between the sealing plate and the outer packing panel, so that the dual effects of fire resistance and heat insulation are achieved.

Drawings

FIG. 1 is a front view of the front smoke box structure of the present invention;

FIG. 2 is a sectional view taken along the direction of 1-A of the present invention;

FIG. 3 is an enlarged view of a portion I of the present invention;

FIG. 4 is a schematic view of the sealing plate structure of the front smoke box of the present invention;

FIG. 5 is a schematic view of the sealing face supporting plate of the present invention;

FIG. 6 is a schematic view of the structure of the sealing door plate of the front smoke box of the present invention;

fig. 7 is the structure schematic diagram of the outer packing flat head of the utility model.

Wherein: 1-combustion head, 2-front smoke box body, 3-front smoke box sealing plate, 4-front smoke box outer packaging panel, 5-condensate water discharge pipe, 6-fire-resistant layer, 7-heat preservation layer, 8-fire observation hole, 9-burner interface, 11-combustion head flange, 21-hole groove, 31-front smoke box sealing door plate, 32-sealing surface supporting plate, 33-front smoke box inner sealing ring, 34-front smoke box outer sealing ring, 35-sealing door plate bolt, 36-front smoke box sealing plate handle, 37-articulated shaft, 41-outer packaging flat head, 42-heat preservation iron sheet, 43-nameplate and 91-burner interface flange.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following describes the technical solution of the present invention with reference to the accompanying drawings and embodiments.

A front smoke box structure of a central back-fire boiler in a plateau area is characterized in that a circular combustion head 1 is arranged at the center of one end of a front smoke box body 2, a porous plate welded and fixed with the inner wall of the front smoke box is arranged around the combustion head 1, the porous plate is divided into four porous grooves 21 by four partition plates which are respectively symmetrical up and down and left and right, the combustion head 1 is positioned at the center of the four partition plates, a front smoke box sealing plate 3 capable of being sealed with the porous groove 21 is arranged outside each porous groove 21, a fire-resistant layer 6 is arranged between each porous groove 21 and the front smoke box sealing plate 3, each front smoke box sealing plate 3 and the front smoke box body 2 are connected in an opening and closing mode, and a front smoke box outer packaging panel 4 is further arranged outside each front smoke box sealing plate 3; an insulating layer 7 is arranged between the front smoke box sealing plate 3 and the front smoke box outer packaging panel 4, and the bottom of the front smoke box body 2 is communicated with a condensed water discharge pipe 5; and the upper part of the combustion head 1 is provided with a fire observation hole 8.

Further, the front smoke box sealing plate 3 comprises a front smoke box sealing door plate 31 and a sealing device, the sealing device comprises an annular sealing surface supporting plate 32, a front smoke box inner sealing ring 33 and a front smoke box outer sealing ring 34 which are fixed on the front smoke box sealing door plate 31, the inner side and the outer side of the sealing surface supporting plate 32 are respectively clamped with the front smoke box inner sealing ring 33 and the front smoke box outer sealing ring 34, and the sealing surface supporting plate 32, the front smoke box inner sealing ring 33 and the front smoke box outer sealing ring 34 form an integral sealing device; the front smoke box inner sealing ring 33 and the front smoke box outer sealing ring 34 are made of ceramic asbestos ropes.

Further, the outer edge of the front smoke box sealing door panel 31 is also provided with a plurality of sealing door panel bolts 35, the position of each hole-shaped groove 21 on the front smoke box body 2 is provided with a flange corresponding to the sealing door panel bolts 35 one to one, the front smoke box sealing plate 3 is closed and matched with the front smoke box body 2 through the flange bolts in a screwing mode to be in sealing connection, when the sealing effect is not influenced, the stress of the four axially symmetrical front smoke box sealing plates 3 is even, the rigidity of the four axially symmetrical front smoke box sealing plates is superior to that of a whole block type structure and a two-piece petal type structure, deformation caused by insufficient integral rigidity can be avoided, sealing failure is caused, and once a furnace body generates smoke leakage, the sealing plates do not need to be integrally dismantled, and only a certain petal type sealing plate needs to be.

Furthermore, a front smoke box sealing plate handle 36 is further arranged on the front smoke box sealing plate 3, when the sealing plate is dismounted, the nut is taken off, and the front smoke box sealing plate 3 can be opened by pulling the front smoke box sealing plate handle 36; because preceding smoke box closing plate 3 is the metal material, and weight is great, with preceding smoke box closing plate 3 articulated in the front on smoke box 2, need not get the whole board and fall when demolising, and through the pulling of preceding smoke box closing plate handle 36, can save physical power, alleviate workman's intensity of labour.

Furthermore, the upper part of the combustion head 1 is also provided with a fire observation hole 8, and the combustion condition in the furnace body can be observed through the fire observation hole 8.

Preceding 2 bottoms of smoke box body still communicate and have the comdenstion water to let out pipe 5, if the stove fire is not vigorous, the flue gas temperature in the smoke box is lower, and the flue gas converts into liquid in the smoke box, the accessible the comdenstion water is let out outside the stove of discharging when pipe 5 years old, places the condensate too much and blocks up fireworks tube bank, has reduced the production risk, has further ensured the security of boiler.

Further, a front cigarette box outer packaging panel 4 is arranged outside the front cigarette box body 2; the front smoke box outer packing panel 4 comprises an outer packing flat end socket 41 and a heat preservation iron sheet 42, the outer packing flat end socket 41 is positioned outside the front smoke box sealing plate 3, two openings are designed in the middle and respectively correspond to the combustion head 1 and the fire observation hole 8 one by one, the outer packing flat end socket 41 and the heat preservation iron sheet 42 are both special iron sheets, and a whole body is formed by pressing; a nameplate 43 is also arranged on the outer packing flat head 41; the heat preservation iron sheet 42 is positioned outside the cigarette box bodies 2 and completely surrounds the four cigarette box bodies 2, and a heat preservation layer 7 and a fire-resistant layer 6 are sequentially arranged between the heat preservation iron sheet 42 and the front cigarette box body 2 from outside to inside; the heat insulation material in the heat insulation layer 7 is fixed by a grabbing nail, the grabbing nail is 06 thread steel and is arranged according to the size of 200 x 200 mm;

further, a fire-resistant layer 6 is arranged on the outer side of each of the front smoke box body 2 and the combustion head 1, and a heat-insulating layer 7 is arranged between the two fire-resistant layers 6; and a heat-insulating layer 7 and a fire-resistant layer 6 are also sequentially arranged between the fire observation hole 8 and the combustion head 1 and between the fire observation hole 8 and the front cigarette box body 2.

Further, the insulating layer 7 is made of an aluminum silicate fiberboard, the fire-resistant layer 6 is made of refractory concrete, and the refractory concrete is formed by integrally pouring high-alumina powder, aggregate (0-3), aggregate (5-10) and high-vanadium aluminum cement; the aggregate is a refractory particle which plays a skeleton role in a refractory material and is prepared by calcining, crushing or artificially synthesizing various fire-loaded raw materials, wherein the aggregate (0-3) is an aggregate with the particle size of 0-3mm, and the aggregate (5-10) is an aggregate with the particle size of 5-10 mm.

Further, the refractory concrete comprises the following components in percentage by weight: aggregate (0-3): aggregate (5-10): high vanadium alumina cement =15:35:35: 15.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a preceding smoke box structure of boiler is fired back at plateau district center which characterized in that: a circular combustion head (1) is arranged at the center of one end of the front cigarette box body (2), a porous plate is arranged around the combustion head (1), the outer side of the porous plate is divided into four porous grooves (21) by four partition plates which are respectively symmetrical up and down and left and right, a front cigarette box sealing plate (3) capable of being sealed with the porous plate is arranged outside each porous groove (21), a fire-resistant layer (6) is arranged between each porous groove (21) and the front cigarette box sealing plate (3), each front cigarette box sealing plate (3) is in open-close connection with the front cigarette box body (2), and a front cigarette box outer packaging panel (4) is arranged outside each front cigarette box sealing plate (3); an insulating layer (7) is arranged between the front smoke box sealing plate (3) and the front smoke box outer packaging panel (4), and a condensed water discharge pipe (5) is communicated with the bottom of the front smoke box body (2); the upper part of the combustion head (1) is provided with a fire observation hole (8).

2. The front smoke box structure of the central flashback boiler in the plateau area as claimed in claim 1, wherein: the front smoke box sealing plate (3) comprises a front smoke box sealing door plate (31) and a sealing device, the sealing device comprises an annular sealing surface supporting plate (32) and two sealing rings, the annular sealing surface supporting plate is fixedly arranged on the front smoke box sealing door plate (31), and the sealing rings are a front smoke box inner sealing ring (33) arranged on the inner side of the sealing surface supporting plate (32) and a front smoke box outer sealing ring (34) arranged on the outer side of the sealing surface supporting plate (32).

3. The front smoke box structure of the central flashback boiler in the plateau area as claimed in claim 1, wherein: the front smoke box body (2) and the combustion head (1) are also respectively provided with a fire-resistant layer (6), and a heat-insulating layer (7) is arranged between the two fire-resistant layers (6).

4. The front smoke box structure of the central flashback boiler in the plateau area as claimed in claim 1, wherein: preceding smoke box extranal packing panel (4) are including extranal packing flat head (41) and heat preservation iron sheet (42), heat preservation iron sheet (42) with outside-in also is equipped with heat preservation (7) and flame retardant coating (6) in proper order between preceding smoke box body (2).

5. The front smoke box structure of the central flashback boiler in the plateau area as claimed in claim 4, wherein: two openings are designed in the middle of the outer packing flat head (41), the two openings respectively correspond to the combustion head (1) and the fire observation holes (8) one by one, and a nameplate (43) is further arranged on the outer packing flat head (41).