CN216047620U

CN216047620U - Biomass circulating fluidized bed with high-temperature flue gas heat recycling and discharging capacity

Info

Publication number: CN216047620U
Application number: CN202121970147.5U
Authority: CN
Inventors: 王锡斌; 张卫东; 高�玉; 方仲勇
Original assignee: Zhang Weigher
Current assignee: Zhang Weigher
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2022-03-15
Anticipated expiration: 2031-08-20

Abstract

The utility model discloses a biomass circulating fluidized bed with high-temperature flue gas heat recycling and discharging capacity, and relates to the technical field of production and processing equipment. The inner wall of the dredging and cleaning pipe is cleaned by blowing the rotary wind teeth to drive the rotary scraping strips through hot air flow, external driving is not needed, the hot air flow is transmitted from the bottom side of the separating and screening cylinder through the dredging and cleaning pipe, and the rotary filter plate and the filter arc plate are used for filtering, so that the problem that the smoke generated by combustion of a combustion furnace carries part of incompletely combusted ash and slag to pollute the environment is well solved.

Description

Biomass circulating fluidized bed with high-temperature flue gas heat recycling and discharging capacity

Technical Field

The utility model relates to the technical field of production and processing equipment, in particular to a biomass circulating fluidized bed with high-temperature flue gas heat recycling and discharging capacity.

Background

The amount of solid biomass available in china is huge, mainly based on agricultural waste and wood waste. The biomass is distributed and dispersed, and is difficult to collect and transport, and the large-scale combustion technology is difficult to adopt under the current conditions in China. The biomass gasification technology is a new technology which appears in the twentieth century and utilizes biomass as energy.

Biomass (mainly crop straws) gasification is a technology for biomass thermochemical conversion, and the basic principle is that under the condition of incomplete combustion, a biomass raw material is heated, so that organic hydrocarbon chains with higher molecular weight are cracked to become combustible gases such as CO, H2, CH4 and the like with lower molecular weight, and the biomass thermochemical conversion method is a common biomass energy conversion way. The biomass gasification energy conversion efficiency is high, the equipment is simple, the operation is easy, and the biomass gasification energy conversion method is not limited by regions, fuel types and climates. The combustible gas generated by gasifying the biomass can be widely used for cooking, heating and crop drying, and can also be used as fuel of power devices such as an internal combustion engine, a heat engine and the like to output electric power or power, so that the energy grade and the utilization efficiency of the biomass are improved.

The biomass gasification technology can be divided into fixed bed gasification technology, fluidized bed gasification technology and entrained bed gasification technology according to the gasification furnace technology. However, the existing circulating fluidized bed has certain defects when in use.

The following problems exist in the prior art:

1. when the existing circulating fluidized bed is used, when flue gas generated by combustion of a combustion furnace is transmitted in a pipeline, components carried in the flue gas can be attached to the wall of the pipeline under the condition that the temperature is gradually reduced, and the pipeline can be blocked after too long time;

2. when the existing circulating fluidized bed is used, biomass fuel is insufficiently combusted, smoke generated by combustion of a combustion furnace can carry a part of insufficiently combusted and ash, and the discharged ash is excessive and can pollute the environment.

SUMMERY OF THE UTILITY MODEL

The utility model provides a biomass circulating fluidized bed with high-temperature flue gas heat recycling and discharging capacity, which aims to dredge and clean a pipe and solve the problems that when the existing circulating fluidized bed is used, flue gas generated by combustion of a combustion furnace is conveyed by a pipeline, components carried in the flue gas can be attached to the pipe wall under the condition that the temperature is gradually reduced, and the pipeline is blocked due to overlong time; the other purpose is to solve the problems that when the existing circulating fluidized bed is used, the combustion of biomass fuel is insufficient, the flue gas generated by the combustion of the combustion furnace can carry part of insufficiently combusted and ash slag, and the discharged ash slag can pollute the environment, so that a separating and screening cylinder is arranged.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:

the biomass circulating fluidized bed with the high-temperature flue gas heat recycling and discharging capacity comprises a fluidized bed combustion furnace, a dredging and cleaning pipe and a separating and screening barrel, wherein the dredging and cleaning pipe is fixedly connected to the right side of the top end of the fluidized bed combustion furnace, and the separating and screening barrel is fixedly connected to one end, far away from the fluidized bed combustion furnace, of the dredging and cleaning pipe.

The inside of mediation clearance pipe is provided with supplementary center ring, the inner wall swing joint of supplementary center ring has central connecting axle, the rotatory wind tooth of both ends fixedly connected with of central connecting axle.

The left side of a separation screening section of thick bamboo is provided with the rotating electrical machines, the right-hand member outer wall fixedly connected with rotary filter of rotating electrical machines, rotary filter keeps away from rotating electrical machines one end fixedly connected with filters the arc board, filter the arc board with the inner wall swing joint of a separation screening section of thick bamboo.

The technical scheme of the utility model is further improved as follows: the outer wall fixedly connected with bracing piece of auxiliary centre ring, the bracing piece is kept away from the outer wall fixedly connected with joint ring of auxiliary centre ring, the outer wall of joint ring with the inner wall fixed connection of mediation clearance pipe.

The technical scheme of the utility model is further improved as follows: the bottom fixedly connected with of separation screening section of thick bamboo collects the fill, the bottom fixedly connected with feed back pipe of collecting the fill, the top fixedly connected with of rotatory wind tooth scrapes the strip, one side of rotatory strip of scraping with the inner wall swing joint of mediation clearance pipe.

The technical scheme of the utility model is further improved as follows: the upper surface of the separation and screening cylinder is fixedly connected with a circulation pipe, and one end of the circulation pipe, far away from the separation and screening cylinder, is fixedly connected with a superheater.

The technical scheme of the utility model is further improved as follows: one end of the feed back pipe, which is far away from the collecting hopper, is fixedly connected with the right side of the fluidized bed combustion furnace, and one side of the feed back pipe is fixedly connected with an air blower.

The technical scheme of the utility model is further improved as follows: and the left side of the fluidized bed combustion furnace is fixedly connected with a raw material adding device.

Due to the adoption of the technical scheme, compared with the prior art, the utility model has the technical progress that:

1. the utility model provides a biomass circulating fluidized bed with high-temperature flue gas heat recycling and discharging capacity, wherein hot air flow blows a rotary air tooth to drive a rotary scraping strip to clean the inner wall of a dredging and cleaning pipe, external driving is not needed, and the problems that when the existing circulating fluidized bed is used, flue gas generated by combustion of a combustion furnace is attached to the pipe wall under the condition that the temperature is gradually reduced and the pipe is blocked due to overlong time when the flue gas is transmitted through a pipe are well solved.

2. The utility model provides a biomass circulating fluidized bed with high-temperature flue gas heat recycling and discharging capacity, which well solves the problems that when the existing circulating fluidized bed is used, biomass fuel is not sufficiently combusted, flue gas generated by combustion of a combustion furnace can carry a part of incompletely combusted and ash slag, and the discharged ash slag is excessive and can pollute the environment.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a detailed view of the dredging and cleaning pipe structure of the present invention;

FIG. 3 is a schematic view of the auxiliary centering ring structure of the present invention;

fig. 4 is a schematic view showing the structure of the separation screening drum of the present invention in detail.

In the figure: 1. a fluidized bed combustion furnace; 2. dredging and cleaning the pipe; 3. a separation screening cylinder; 4. a rotating electric machine; 5. a flow-through tube; 6. a collecting hopper; 7. a blower; 8. a material return pipe; 9. a raw material adding device; 10. rotating the scraping strip; 11. rotating the wind teeth; 12. an auxiliary center ring; 13. a central connecting shaft; 14. a support bar; 15. a snap ring; 16. rotating the filter plate; 17. a superheater; 18. and (4) filtering the arc plate.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

example 1

As shown in fig. 1-4, the utility model provides a biomass circulating fluidized bed with high-temperature flue gas heat recycling and discharging capability, which comprises a fluidized bed combustion furnace 1, a dredging and cleaning pipe 2 and a separating and screening cylinder 3, wherein the dredging and cleaning pipe 2 is fixedly connected to the right side of the top end of the fluidized bed combustion furnace 1, the separating and screening cylinder 3 is fixedly connected to one end of the dredging and cleaning pipe 2, which is far away from the fluidized bed combustion furnace 1, an auxiliary central ring 12 is arranged inside the dredging and cleaning pipe 2, a central connecting shaft 13 is movably connected to the inner wall of the auxiliary central ring 12, rotating wind teeth 11 are fixedly connected to both ends of the central connecting shaft 13, hot air flow blows the rotating wind teeth 11 to rotate around the central connecting shaft 13 in the transmission process, at the moment, a rotating scraping strip 10 rotates and cleans the inner wall of the dredging and cleaning pipe 2, a rotating motor 4 is arranged on the left side of the separating and screening cylinder 3, rotating electrical machines 4's right-hand member outer wall fixedly connected with rotary filter 16, rotary filter 16 keeps away from 4 one end fixedly connected with of rotating electrical machines and filters arc board 18, rotary filter 16 and filter arc board 18 carry out anticlockwise rotation, large particulate matter such as biomass raw materials, bed charge or lime-ash separate with the hot gas flow, make it collect and fight in 6, filter arc board 18 and the inner wall swing joint of separation screening section of thick bamboo 3, the outer wall fixedly connected with bracing piece 14 of supplementary center ring 12, the outer wall fixedly connected with joint ring 15 of supplementary center ring 12 is kept away from to bracing piece 14, the outer wall of joint ring 15 and the inner wall fixed connection of mediation clearance pipe 2.

Example 2

As shown in fig. 1 to 4, on the basis of embodiment 1, the present invention provides a technical solution: preferably, the bottom fixedly connected with of separation screening section of thick bamboo 3 collects and fights 6, the bottom fixedly connected with return pipe 8 of collecting and fighting 6, the rotatory strip 10 of scraping of the top fixedly connected with of rotatory wind tooth 11, the one side of rotatory strip 10 and the inner wall swing joint of mediation clearance pipe 2, the last fixed surface of separation screening section of thick bamboo 3 is connected with runner pipe 5, the one end fixedly connected with over heater 17 of separation screening section of thick bamboo 3 is kept away from to runner pipe 5, return pipe 8 is kept away from the one end of collecting and fighting 6 and the right side fixed connection of fluidized bed combustion furnace 1, one side fixedly connected with air-blower 7 of return pipe 8, fluidized bed combustion furnace 1's left side fixedly connected with raw materials adds device 9.

The working principle of the biomass circulating fluidized bed with the high-temperature flue gas heat recycling and discharging capability is described in detail below.

As shown in fig. 1-4, after the biomass fuel and air in the fluidized bed combustion furnace 1 are mixed and combusted, the hot air flow enters the dredging and cleaning pipe 2, the air flow blows the rotary wind teeth 11 to rotate around the central connecting shaft 13 in the process of transmission, at the moment, the rotary scraping strips 10 rotate and clean the inner wall of the dredging and cleaning pipe 2, and when the hot air flow is transmitted into the separation screening cylinder 3 through the dredging and cleaning pipe 2. The rotary motor 4 starts to drive the rotary filter plate 16 and the filter arc plate 18 to rotate anticlockwise, large granular substances such as biomass raw materials, bottom materials or ash slag are separated from hot air flow and collected in the collecting hopper 6, and finally the large granular substances are conveyed into the fluidized bed combustion furnace 1 through the material return pipe 8 to be circularly combusted again, and the air blower 7 performs auxiliary blowing.

The present invention has been described in general terms in the foregoing, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the present invention. Therefore, modifications or improvements are within the scope of the utility model without departing from the spirit of the inventive concept.

Claims

1. The utility model provides a take high temperature flue gas heat to retrieve biomass circulating fluidized bed of discharge ability again, includes that fluidized bed fires burning furnace (1), mediation clearance pipe (2) and separation screening section of thick bamboo (3), its characterized in that: the right side of the top end of the fluidized bed combustion furnace (1) is fixedly connected with a dredging and cleaning pipe (2), and one end of the dredging and cleaning pipe (2) far away from the fluidized bed combustion furnace (1) is fixedly connected with a separation screening drum (3);

an auxiliary center ring (12) is arranged inside the dredging and cleaning pipe (2), the inner wall of the auxiliary center ring (12) is movably connected with a center connecting shaft (13), and two ends of the center connecting shaft (13) are fixedly connected with rotating wind teeth (11);

the left side of a separation screening section of thick bamboo (3) is provided with rotating electrical machines (4), the right-hand member outer wall fixedly connected with rotary filter (16) of rotating electrical machines (4), rotary filter (16) are kept away from rotating electrical machines (4) one end fixedly connected with filters arc board (18), filter arc board (18) with the inner wall swing joint of a separation screening section of thick bamboo (3).

2. The biomass circulating fluidized bed with the high-temperature flue gas heat recycling and discharging capacity of claim 1 is characterized in that: the outer wall fixedly connected with bracing piece (14) of auxiliary centre ring (12), keep away from bracing piece (14) the outer wall fixedly connected with joint ring (15) of auxiliary centre ring (12), the outer wall of joint ring (15) with the inner wall fixed connection of mediation clearance pipe (2).

3. The biomass circulating fluidized bed with the high-temperature flue gas heat recycling and discharging capacity of claim 1 is characterized in that: the bottom fixedly connected with of separation screening section of thick bamboo (3) is collected and is fought (6), the bottom fixedly connected with feed back pipe (8) of collecting fill (6), the rotatory strip (10) of scraping of top fixedly connected with of rotatory wind tooth (11), one side of rotatory strip (10) of scraping with the inner wall swing joint of mediation clearance pipe (2).

4. The biomass circulating fluidized bed with the high-temperature flue gas heat recycling and discharging capacity of claim 1 is characterized in that: the upper surface of the separation and screening cylinder (3) is fixedly connected with a circulating pipe (5), and one end, far away from the separation and screening cylinder (3), of the circulating pipe (5) is fixedly connected with a superheater (17).

5. The biomass circulating fluidized bed with the high-temperature flue gas heat recycling and discharging capacity of claim 3 is characterized in that: one end, far away from the collecting hopper (6), of the material return pipe (8) is fixedly connected with the right side of the fluidized bed combustion furnace (1), and one side of the material return pipe (8) is fixedly connected with an air blower (7).

6. The biomass circulating fluidized bed with the high-temperature flue gas heat recycling and discharging capacity of claim 1 is characterized in that: the left side of the fluidized bed combustion furnace (1) is fixedly connected with a raw material adding device (9).