CN212719682U

CN212719682U - Large single-drum boiler body

Info

Publication number: CN212719682U
Application number: CN202021345387.1U
Authority: CN
Inventors: 戴金波; 伍敏; 周承顺
Original assignee: Hengyang Hengguo Boiler Co ltd
Current assignee: Hengyang Hengguo Boiler Co ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-03-16
Anticipated expiration: 2030-07-10

Abstract

The utility model discloses a large-scale single-drum boiler body, including combustion system and soda system, combustion system include furnace, with the material transport device and the tail-gas processing apparatus of furnace intercommunication, furnace including supply the lower furnace of fuel burning and with lower furnace intercommunication is close to the last furnace that soda system set up, tail-gas processing apparatus include the flue gas pipe and set firmly in the economizer of flue gas pipe and around locating the first preheating pipe of economizer outer wall, go up the furnace include with soda system encloses into the lateral wall of flue gas runner jointly and inlays and locate many second preheating pipe in the lateral wall, the second preheating pipe's one end with soda system intercommunication, the other end with first preheating pipe connects, the other end and the outside water supply part of first preheating pipe are connected. Compared with the prior art, the utility model provides a large-scale single-drum boiler body, stable in structure, evaporation efficiency height and energy-concerving and environment-protective.

Description

Large single-drum boiler body

Technical Field

The utility model relates to the technical field of boilers, especially, relate to a large-scale single-drum boiler body.

Background

The boiler body, i.e. the body part of the boiler, generally consists of a boiler barrel and its accessories, heating surfaces, headers and connecting pipes, steam-water system pipes and accessories, combustion equipment, flue gas and air pipes, a framework and a furnace wall. In the use process of a large single-drum boiler body in the prior art, the flue gas temperature of a tail flue of the boiler is still close to 400 ℃, and in order to utilize the heat of the flue gas to the maximum extent, the large boiler body can arrange a plurality of low-temperature heating surfaces on the tail flue to cool the tail flue gas. Meanwhile, because the biomass fuel (wood chips, wood chips or wood particles and the like) contains a small amount of inorganic mineral substances and contains elements such as silicon, aluminum, calcium, iron and the like, in the combustion process of coal, the impurities are easily discharged to the atmosphere along with flue gas, and further cause pollution to the atmosphere.

Therefore, it is necessary to provide a large single-drum boiler body with stable structure, high evaporation efficiency, energy saving and environmental protection to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides a large single-drum boiler body which is stable in structure, high in evaporation efficiency, energy-saving and environment-friendly.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a large-scale single-drum boiler body, includes combustion system and soda system, combustion system include furnace, with the material transport device and the tail smoke processing apparatus of furnace intercommunication, furnace including supply the lower furnace of fuel burning and with lower furnace intercommunication and be close to the last furnace that soda system set up, tail smoke processing apparatus includes the flue gas pipe and set firmly in the economizer of flue gas pipe and around locating the economizer outer wall first preheating pipe, go up the furnace include with soda system encloses the lateral wall of flue gas runner jointly and inlays and locate many second preheating pipe in the lateral wall, the one end of second preheating pipe with soda system intercommunication, the other end with first preheating pipe connects, the other end of first preheating pipe is connected with outside water supply part.

Preferably, the lateral wall includes relative first lateral wall and the second lateral wall that sets up, is connected first lateral wall with two third lateral walls of second lateral wall, certainly first lateral wall is to being close to the first fender wall that second lateral wall direction extension formed reaches certainly the second lateral wall is to being close to the second fender wall that first lateral wall direction extension formed, first fender wall with second lateral wall interval sets up and forms the clearance, the second fender wall with first lateral wall interval sets up and forms the clearance, first fender wall with the second fender wall is followed two the direction of connection of third lateral wall interval sets gradually.

Preferably, the molding material of the side wall is refractory concrete.

Preferably, the length of the first side wall is equal to the length of the second side wall and is greater than the length of the third side wall, the first blocking wall is parallel to the second blocking wall, and the first blocking wall and the second blocking wall jointly divide the flue gas flow channel into a plurality of sub-flow channels which are communicated in sequence.

Preferably, the hearth further comprises a middle hearth clamped between the lower hearth and the upper hearth, the middle hearth is communicated with the flue gas flow channel, and an ash falling device used for collecting dust in the flue gas is arranged in the middle hearth.

Preferably, the combustion system further comprises an air box communicated with the lower hearth, a plurality of air supply devices are arranged in the air box, and the air supply devices supply air to the lower hearth together.

Preferably, the material conveying device comprises a grate at least partially arranged in the lower hearth and a charging barrel arranged at one end of the grate.

Preferably, the steam-water system comprises a water tank, a steam valve seat arranged at one end of the water tank far away from the hearth, a pressure gauge seat communicated with the water tank, a water level gauge seat and a sewage pipe seat.

Preferably, the steam-water system further comprises a furnace water sampling pipe for communicating the water tank with the outside.

In summary, compared with the prior art, the large single-drum boiler body provided by the utility model has the advantages that by arranging the first preheating pipeline wound on the outer wall of the economizer and the plurality of second preheating pipelines embedded in the side wall, water flow undergoes two heating processes before flowing into the steam-water system, so that the temperature of the water flow led into the steam-water system is increased, the evaporation of the water flow is facilitated, the exhaust temperature of tail smoke is reduced while the evaporation efficiency of the water flow is increased, and the large single-drum boiler body is energy-saving and environment-friendly; the first blocking wall and the second blocking wall are arranged between the first side wall and the second side wall, and the flue gas flow channel is divided into the Y-shaped flow channel by the first blocking wall and the second blocking wall, so that the retention speed of the flue gas is prolonged, and the purification efficiency of the flue gas is ensured.

Drawings

FIG. 1 is a schematic cross-sectional view of a large single-drum boiler body according to the present invention;

FIG. 2 is a schematic view of the cross-sectional structure of another angle of the large single-drum boiler body according to the present invention.

In the figure, 100, a large single-drum boiler body; 10. a combustion system; 11. a hearth; 111. a lower hearth; 1111. a front arch wall; 1112. a rear arch wall; 112. feeding the furnace hearth; 1121. a side wall; 1123. a first side wall; 1124. a second side wall; 1125. a third side wall; 1126. a first retaining wall; 1127. a second retaining wall; 1122. A second preheat line; 113. a middle furnace chamber; 1131. a dust falling device; 12. a material transport device; 121. A grate; 122. a charging barrel; 13. a tail smoke treatment device; 131. a flue gas duct; 132. a coal economizer; 133. A first preheat line; 14. an air box; 141. an air supply device; 20. a steam-water system; 21. a water tank; 22. A steam valve seat; 23. a pressure gauge pipe seat; 24. a water level gauge pipe seat; 25. a blowdown pipe seat; 26. a furnace water sampling tube.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples. The following experimental examples and examples are intended to further illustrate but not limit the invention.

Referring to fig. 1 and 2, the present invention provides a large single-drum boiler body 100, wherein the large single-drum boiler body 100 comprises a combustion system 10 and a steam-water system 20.

The combustion system 10 comprises a hearth 11, a material conveying device 12 and a tail smoke treatment device 13 which are communicated with the hearth 11, and a wind box 14 which is communicated with the hearth 11.

The furnace 11 includes a lower furnace 111 for fuel combustion, an upper furnace 112 communicated with the lower furnace 111 and disposed close to the steam-water system 20, and a middle furnace 113 sandwiched between the lower furnace 111 and the upper furnace 112.

The lower furnace 111 includes a front arch wall 1111 located at the front end in the feeding direction and a rear arch wall 1112 located at the rear end in the feeding direction. The front arch wall 1111 and the rear arch wall 1112 cooperate with the material transportation device 12 to define a combustion chamber for the material, and the material is combusted in the combustion chamber to convert chemical energy into heat energy.

The upper furnace 112 includes a side wall 1121 which forms a flue gas flow channel together with the steam system 20, and a plurality of second preheating pipes 1122 embedded in the side wall 1121. Specifically, the forming material of the side wall 1121 is refractory concrete, one end of the second preheating pipe 1122 is communicated with the water vapor system 20, and the other end is connected to the tail gas treatment device 13.

The side wall 1121 includes a first side wall 1123 and a second side wall 1124 disposed opposite to each other, two third side walls 1125 connecting the first side wall 1123 and the second side wall 1124, a first blocking wall 1126 extending from the first side wall 1123 toward the second side wall 1124, and a second blocking wall 1127 extending from the second side wall 1124 toward the first side wall 1123. The first blocking wall 1126 and the second blocking wall 1124 are spaced apart to form a gap, the second blocking wall 1127 and the first blocking wall 1123 are spaced apart to form a gap, and the first blocking wall 1126 and the second blocking wall 1127 are sequentially spaced apart along a connecting direction of the two third blocking walls 1125.

The first blocking wall 1126 is parallel to the second blocking wall 1127, and the first blocking wall 1126 and the second blocking wall 1127 jointly divide the flue gas flow channel into a plurality of sequentially communicated sub-flow channels. That is to say, the first blocking wall 1126 and the second blocking wall 1127 divide the flue gas flow channel into a zigzag flow channel together, so that the flue gas reciprocates in the flue gas flow channel, the retention time of the flue gas in the flue gas flow channel is prolonged, and impurities in the flue gas fall into the middle furnace 113 under the action of gravity.

Specifically, in the present embodiment, the length of the first sidewall 1123 is equal to the length of the second sidewall 1124 and is greater than the length of the third sidewall 1125.

The middle furnace 113 is communicated with the flue gas flow channel, and an ash falling device 1131 for collecting dust in the flue gas is arranged in the middle furnace 113.

In the working process of the large single-drum boiler body 100, the water flow in the second preheating pipe 1122 enters the water vapor system 20 after being preheated by the flue gas, and the preheated water flow is rapidly heated and evaporated in the water vapor system 20, so that the evaporation efficiency of the large single-drum boiler body 100 is improved.

The material transporting device 12 includes a grate 121 at least partially disposed in the lower hearth 111 and a charging barrel 122 disposed at one end of the grate 121. The grate 121 is driven by a driving device to rotate differently, so that the fuel in the barrel 122 is continuously conveyed into the combustion chamber to perform combustion heat release.

The tail gas treatment device 13 includes a flue gas duct 131, an economizer 132 fixedly disposed in the flue gas duct 131, and a first preheating pipe 133 wound around an outer wall of the economizer 132. One end of the first preheating pipe 133 is connected to the second preheating pipe 1122, and the other end of the first preheating pipe 133 is connected to an external water supply means. In the working process of the large single-drum boiler body 100, when water flow of an external water supply part passes through the first preheating pipe 133, high-temperature flue gas in the economizer 132 is used for first preheating, then the water flow passes through the second preheating pipe 1122 in the side wall 1121 for second preheating, and finally enters the steam-water system 20 for evaporation. Therefore, the high temperature of the tail flue gas is utilized for primary preheating of the water flow, the temperature of the tail flue gas is reduced while the water flow is preheated, and the safety of workers is further guaranteed.

The air box 14 is communicated with the lower furnace 111, a plurality of air supply devices 141 are arranged in the air box 14, and the plurality of air supply devices 141 supply air to the lower furnace 111 together. The flue gas generated by the combustion of the fuel in the lower furnace 111 is introduced into the upper furnace 112 under the action of the air supply device 141, and is finally introduced into the large single-drum boiler body 100 through the flue gas flow channel.

The steam-water system 20 comprises a water tank 21, a steam valve tube seat 22 arranged at one end of the water tank 21 far away from the hearth 11, a pressure gauge tube seat 23 communicated with the water tank 21, a water level gauge tube seat 24, a sewage tube seat 25 and a furnace water sampling tube 26 communicated with the water tank 21 and the outside.

In the use process of the large single-drum boiler body 100, the water flow in the water tank 21 is evaporated and then is guided out through the steam valve tube seat 22, and the pressure gauge tube seat 23, the water level gauge tube seat 24, the sewage tube seat 25 and the boiler water sampling tube 26 are respectively connected with corresponding external components so as to monitor the water flow condition in the water tank 21 in real time.

Compared with the prior art, the large single-drum boiler body provided by the utility model is wound on the first preheating pipeline arranged on the outer wall of the economizer and the plurality of second preheating pipelines embedded in the side wall, and before flowing into the steam-water system, water flow undergoes two heating processes, so that the temperature of the water flow led into the steam-water system is increased, the evaporation of the water flow is facilitated, the exhaust temperature of tail smoke is reduced while the evaporation efficiency of the water flow is increased, and the large single-drum boiler body is energy-saving and environment-friendly; the first blocking wall and the second blocking wall are arranged between the first side wall and the second side wall, and the flue gas flow channel is divided into the Y-shaped flow channel by the first blocking wall and the second blocking wall, so that the retention speed of the flue gas is prolonged, and the purification efficiency of the flue gas is ensured.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should be construed as the scope of the present invention.

Claims

1. The utility model provides a large-scale single-drum boiler body, includes combustion system and soda system, combustion system include furnace, with the material transport device and the tail smoke processing apparatus of furnace intercommunication, its characterized in that, furnace including supply the lower furnace of fuel burning and with lower furnace intercommunication and be close to the last furnace that soda system set up, tail smoke processing apparatus includes flue gas pipe, set firmly in the economizer of flue gas pipe and around locating the economizer outer wall first preheating pipe, go up the furnace including with soda system encloses the lateral wall of flue gas runner jointly and inlays and locate many second preheating pipes in the lateral wall, the one end of second preheating pipe with soda system intercommunication, the other end with first preheating pipe connects, the other end of first preheating pipe is connected with outside water supply part.

2. The large single-drum boiler body according to claim 1, wherein the sidewalls include a first sidewall and a second sidewall that are opposite to each other, two third sidewalls that connect the first sidewall and the second sidewall, a first blocking wall that extends from the first sidewall toward a direction close to the second sidewall, and a second blocking wall that extends from the second sidewall toward a direction close to the first sidewall, the first blocking wall and the second sidewall are spaced apart to form a gap, the second blocking wall and the first sidewall are spaced apart to form a gap, and the first blocking wall and the second blocking wall are sequentially spaced apart along a connection direction of the two third sidewalls.

3. A large single-drum boiler body according to claim 2, characterized in that the molding material of the side walls is refractory concrete.

4. The large single-drum boiler body according to claim 2, wherein the length of the first sidewall is equal to the length of the second sidewall and greater than the length of the third sidewall, the first blocking wall is parallel to the second blocking wall, and the first blocking wall and the second blocking wall together divide the flue gas flow channel into a plurality of sequentially communicating sub-flow channels.

5. The large single-drum boiler body according to claim 4, wherein the furnace further comprises a middle furnace sandwiched between the lower furnace and the upper furnace, the middle furnace is communicated with the flue gas flow passage, and an ash falling device for collecting dust in flue gas is arranged in the middle furnace.

6. The large single-drum boiler body according to claim 1, wherein the combustion system further comprises a wind box communicating with the lower hearth, and a plurality of air supply devices are provided in the wind box and supply air to the lower hearth together.

7. The large single-drum boiler body according to claim 1, wherein the material transporting means comprises a grate at least partially arranged in the lower furnace and a drum arranged at one end of the grate.

8. The large single-drum boiler body according to claim 1, wherein the steam-water system comprises a water tank, a steam valve pipe seat arranged at one end of the water tank far away from the hearth, a pressure gauge pipe seat communicated with the water tank, a water level gauge pipe seat and a sewage pipe seat.

9. The large single-drum boiler body according to claim 8, wherein the steam-water system further comprises a boiler water sampling pipe communicating the water tank with the outside.