CN210979835U

CN210979835U - Boiler device

Info

Publication number: CN210979835U
Application number: CN201922087715.6U
Authority: CN
Inventors: 唐大情; 路义萍; 刘园园; 火舒良; 朱丽
Original assignee: Jiangsu Venus Boiler Manufacture Co ltd
Current assignee: Jiangsu Venus Boiler Manufacture Co ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-07-10
Anticipated expiration: 2029-11-27

Abstract

The utility model discloses a boiler device, which comprises a boiler body, wherein a mixing device, a burner and an exchanger are arranged in the boiler body, the mixing device is communicated with the burner, and the exchanger is arranged around the burner; the mixing device comprises an air channel, a fuel gas channel and a mixing channel, wherein the air channel and the fuel gas channel are vertically arranged; the air channel is communicated with the mixing channel through a plurality of first branch pipes, and the gas channel is communicated with the mixing channel through a plurality of second branch pipes; a plurality of flow equalizing plates are arranged in the mixing channel, the flow equalizing plates are fixed with the inner wall of the mixing channel, and the free ends of the flow equalizing plates are obliquely arranged towards the center of the mixing channel; the free end of the flow equalizing plate is obliquely arranged from the inlet end to the outlet end of the mixing channel, and the included angle between the flow equalizing plate and the vertical plane is 30-45 degrees. Through promoting the misce bene of air and gas for can fully burn when the gas after the mixture gets into the combustor inside, with the temperature distribution in the promotion combustor more even, with the emission that reduces oxynitride.

Description

Boiler device

Technical Field

The utility model particularly relates to a boiler device.

Background

With the improvement of living standard of people and the adjustment of energy structure in China, the proportion of natural gas in energy gradually exceeds that of coal. According to the combustion theory, when the temperature is lower than 1000 ℃, the amount of nitrogen oxides generated by oxidizing natural gas in the combustion process is less; when the temperature is higher than 1000 ℃, the reaction speed increases by about 6 times per 100 ℃ rise of the temperature. Since nitrogen oxides are an important constituent of PM2.5, reducing the emission of nitrogen oxides is an important task for improving the quality of the air environment.

In the actual combustion process, because the temperature distribution in the combustion chamber is uneven, local high temperature can catalyze oxygen and nitrogen in the air to generate oxynitride, and serious pollution is caused to the environment. It is therefore desirable to design a boiler plant that allows a more uniform temperature distribution within the combustion chamber, thereby reducing the nitrogen oxide emissions.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a boiler plant, it can reduce oxynitride's emission.

In order to solve the technical problem, the utility model provides a boiler device, which comprises a furnace body, wherein a mixing device, a burner and an exchanger are arranged in the furnace body, the mixing device is communicated with the burner, and the exchanger is arranged around the burner; the mixing device comprises an air channel, a fuel gas channel and a mixing channel, and the air channel and the fuel gas channel are vertically arranged; the air channel is communicated with the mixing channel through a plurality of first branch pipes, and the gas channel is communicated with the mixing channel through a plurality of second branch pipes; a plurality of flow equalizing plates are arranged in the mixing channel, the flow equalizing plates are fixed with the inner wall of the mixing channel, and the free ends of the flow equalizing plates are obliquely arranged towards the center of the mixing channel; the free end of the flow equalizing plate is obliquely arranged from the inlet end to the outlet end of the mixing channel, and the included angle between the flow equalizing plate and the vertical plane is 30-45 degrees.

Furthermore, a communication position of the first branch pipe and the mixing channel is a first communication port, and a communication position of the second branch pipe and the mixing channel is a second communication port; and the first communication ports and the second communication ports are adjacently arranged.

Furthermore, all the first communication ports and all the second communication ports are distributed in a circular shape.

Further, the mixing channel is communicated with the combustor through a connecting pipe, and the connecting pipe is arranged in a spiral shape.

Furthermore, both ends of the connecting pipe are arranged in a horn shape.

Furthermore, the flow equalizing plates are distributed in a staggered mode around the central axis of the mixing channel.

Furthermore, a plurality of air holes are formed in the flow equalizing plate.

Furthermore, the material of the combustor is metal fiber, and the base material of the combustor is iron-chromium-aluminum fiber.

The utility model has the advantages that:

the vertically arranged air channel and the vertically arranged gas channel ensure that the air and the gas which are converged into the mixing channel are vertical, so that the air and the gas can be better mixed; the air channel is communicated with the mixing channel by the aid of the first branch pipes, so that air converged into the mixing channel can be dispersed, and similarly, the gas channel is communicated with the mixing channel by the aid of the second branch pipes, so that gas can be dispersed, and air and gas can be uniformly mixed; one end of the flow equalizing plate is fixed with the inner wall of the mixing channel, and the other end of the flow equalizing plate is obliquely arranged towards the center of the mixing channel, so that air and fuel gas flowing along the center of the mixing channel can be diffused towards the edge by using the flow equalizing plate, and the air and the fuel gas can be conveniently mixed; the free end of the flow equalizing plate is obliquely arranged from the inlet end to the outlet end of the mixing channel, and the flow of air and fuel gas can be guided by the flow equalizing plate, so that the air and the fuel gas can be fully mixed in the mixing channel, the flow rate of the air and the fuel gas in the mixing channel can be ensured, the continuous and stable output of the mixed fuel can be ensured, and the combustor can stably work; through promoting the misce bene of air and gas for can fully burn when the gas after the mixture gets into the combustor inside, with the temperature distribution in the promotion combustor more even, with the emission that reduces oxynitride.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

fig. 2 is a side view of the present invention;

fig. 3 is a schematic view of the connection of the air passage, the gas passage and the mixing passage.

The reference numbers in the figures illustrate: 1. a furnace body; 11. a burner; 12. an exchanger; 2. an air passage; 21. a first branch pipe; 3. a gas channel; 31. a second branch pipe; 4. a mixing channel; 5. a flow equalizing plate; 51. air holes; 6. and (4) connecting the pipes.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Referring to fig. 1 and 2, an embodiment of a boiler device according to the present invention includes a furnace body 1, a mixing device, a burner 11 and an exchanger 12 are disposed in the furnace body 1, the mixing device and the burner 11 are connected, and the exchanger 12 is disposed around the burner 11. The mixing device is used for uniformly mixing air and fuel gas, then conveying the mixture into the combustor 11 for sufficient combustion, and then realizing heat exchange by utilizing the exchanger 12. In this embodiment, the material of the burner 11 is metal fiber, and specifically, the burner 11 is made of iron-chromium-aluminum fiber as a base material. Because the maximum temperature of the Fe-Cr-Al fiber is 1300 ℃, the combustor 11 still has good oxidation resistance at 1000 ℃, and the combustor 11 also has the advantages of thermal shock resistance, small thermal inertia, uniform combustion and the like. In the working process of the burner 11, the burner 11 made of the iron-chromium-aluminum fibers can keep a sufficient combustion state, and the combustion efficiency is improved; meanwhile, the excess air coefficient of the combustor 11 is small, the air demand is reduced, the dew point of the flue gas is increased, and the flue gas can enter a condensation stage as early as possible. Since the structure of the burner 11 and the exchanger 12 is of the prior art, it will not be described in detail here.

Referring to fig. 1 and 3, the mixing device comprises an air passage 2, a gas passage 3 and a mixing passage 4, wherein the air passage 2 is used for conveying air, the gas passage 3 is used for conveying gas, and the mixing passage 4 is used for mixing and conveying mixed gas. The air channel 2 is communicated with the mixing channel 4 through a plurality of first branch pipes 21, the gas channel 3 is communicated with the mixing channel 4 through a second branch pipe 31, and the air channel 2 and the gas channel 3 are vertically arranged in the embodiment. The vertically arranged air channel 2 and gas channel 3 make the air and gas which are merged into the mixing channel 4 vertical, so that the air and the gas can be better mixed. Utilize a plurality of first minute pipes 21 to communicate air channel 2 and mixing channel 4, can make the air of joining in mixing channel 4 inside disperse, and in the same way, utilize the second to manage 31 and also can disperse the gas with gas channel 3 and mixing channel 4 intercommunication to the homogeneous mixing of air and gas.

Referring to fig. 1 and 3, a communication point of the first branch pipe 21 with the mixing channel 4 is referred to as a first communication port, and a communication point of the second branch pipe 31 with the mixing channel 4 is referred to as a second communication port. The first intercommunication mouth flows in and has the air, and the interior flow of second intercommunication mouth has the gas, utilizes the adjacent distribution of first intercommunication mouth and second intercommunication mouth to make air and gas change intensive mixing. In this embodiment, all the first communicating ports and all the second communicating ports are distributed in a circular shape, which not only increases the distribution amount of the first communicating ports and the second communicating ports, but also gathers air and fuel gas at the inlet end of the mixing channel 4, thereby facilitating the mixing of air and fuel gas at the inlet end of the mixing channel; so that the mixed gas can be sufficiently combusted when entering the interior of the burner 11 to promote more uniform temperature distribution in the burner 11 and reduce the discharge amount of nitrogen oxides.

Referring to fig. 1, a plurality of flow equalizing plates 5 are disposed in the mixing channel 4, the flow equalizing plates 5 are fixedly connected to the inner wall of the mixing channel 4, and the free ends of the flow equalizing plates 5 are inclined toward the center of the mixing channel 4. The free end of the flow equalizing plate 5 in this embodiment is arranged obliquely from the inlet end of the mixing channel 4 towards its outlet end, and the angle between the flow equalizing plate 5 and the vertical plane is preferably 30 ° to 45 °. The flow rate of the air and the fuel gas can be reduced by utilizing the obliquely arranged flow equalizing plate 5, so that the air and the fuel gas can be mixed uniformly more easily. In addition, the air and the fuel gas are easy to form vortex near the flow equalizing plate 5 in the flowing process, and the mixing of the air and the fuel gas is promoted. In this embodiment, one end of the flow equalizing plate 5 is fixed to the inner wall of the mixing channel 4, and the other end of the flow equalizing plate is inclined toward the center of the mixing channel 4, so that the air and the fuel gas flowing along the center of the mixing channel 4 can be diffused to the edge by the flow equalizing plate 5, thereby facilitating the mixing of the air and the fuel gas. The free end of the flow equalizing plate 5 is obliquely arranged towards the outlet end by the inlet end of the mixing channel 4, and the flow of air and fuel gas can be guided by the flow equalizing plate 5, so that the air and the fuel gas in the mixing channel 4 can be fully mixed, the flow rate of the air and the fuel gas in the mixing channel 4 can be ensured, the continuous and stable output of mixed fuel can be ensured, and the combustor 11 can stably work.

Referring to fig. 1, the flow equalizing plate 5 is provided with a plurality of air holes 51, which can further disperse air and gas and promote the mixing of the air and the gas. Meanwhile, all the flow equalizing plates 5 are distributed around the axis of the mixing channel 4 in a staggered manner, so that the flow equalizing plates 5 do not greatly influence the flow rate of the air and the fuel gas in the mixing channel 4 in the process of dispersing and guiding the air and the fuel gas, and the continuous and stable output of the mixed fuel is ensured. Meanwhile, the flow equalizing plates 5 which are distributed along the central axis of the mixing channel 4 in a staggered manner enable air and fuel gas to flow in an S shape in the flowing process, and further mixing of the air and the fuel gas is promoted.

Referring to fig. 1, the mixing channel 4 is communicated with the burner through a connecting pipe 6, and the burner 11 is disposed in a spiral shape, and both ends of the connecting pipe 6 are disposed in a horn shape in order to increase the flow rate of the mixed gas. In addition, the connecting pipe 6 that is the screw-tupe setting can promote the better mixture of air and gas at the in-process that flows for can fully burn when the gas after the mixture gets into combustor 11 inside, with the temperature distribution in the promotion combustor 11 more even, with the emission that reduces oxynitride.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. A boiler device is characterized by comprising a furnace body, wherein a mixing device, a combustor and an exchanger are arranged in the furnace body, the mixing device is communicated with the combustor, and the exchanger is arranged around the combustor; the mixing device comprises an air channel, a fuel gas channel and a mixing channel, and the air channel and the fuel gas channel are vertically arranged; the air channel is communicated with the mixing channel through a plurality of first branch pipes, and the gas channel is communicated with the mixing channel through a plurality of second branch pipes; a plurality of flow equalizing plates are arranged in the mixing channel, the flow equalizing plates are fixed with the inner wall of the mixing channel, and the free ends of the flow equalizing plates are obliquely arranged towards the center of the mixing channel; the free end of the flow equalizing plate is obliquely arranged from the inlet end to the outlet end of the mixing channel, and the included angle between the flow equalizing plate and the vertical plane is 30-45 degrees.

2. The boiler apparatus according to claim 1, wherein a communication between the first branch pipe and the mixing channel is a first communication port, and a communication between the second branch pipe and the mixing channel is a second communication port; and the first communication ports and the second communication ports are adjacently arranged.

3. The boiler arrangement according to claim 2, wherein all of the first communication ports and all of the second communication ports are distributed in a circular shape.

4. The boiler arrangement according to claim 1, wherein the mixing channel communicates with the burner via a connecting tube, the connecting tube being in an S-shaped arrangement.

5. The boiler arrangement according to claim 4, wherein both ends of the connecting tube are flared.

6. The boiler arrangement according to claim 1, wherein the flow equalizing plates are offset around the central axis of the mixing channel.

7. The boiler arrangement according to claim 1, wherein the flow equalizer plate has a plurality of air holes formed therein.

8. The boiler arrangement according to claim 1, wherein the material of the burner is metal fibers and the substrate of the burner is iron-chromium-aluminum fibers.