CN218755608U

CN218755608U - Multistage tar removing structure of biomass gasification furnace

Info

Publication number: CN218755608U
Application number: CN202320060144.0U
Authority: CN
Inventors: 任启均; 邢义会
Original assignee: Sichuan Daoluo Biotechnology Co ltd
Current assignee: Sichuan Daoluo Biotechnology Co ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-03-28
Anticipated expiration: 2033-01-10

Abstract

The utility model discloses a multistage decoking oil structure of biomass gasification stove, furnace body including vertical setting, including vaporizer, combustion chamber and gas collecting chamber in the furnace body, the combustion chamber sets up below and the vaporizer of vaporizer and communicates with each other, and the gas collecting chamber setting is in the vaporizer top and communicates with each other, and the furnace body lateral wall is equipped with the gas output tube with the gas collecting chamber switch-on, its characterized in that, the exit end of gas output tube is connected with the tar filter, and the gas outlet of tar filter is connected with the gas-supply pipe, is equipped with the high temperature tube in the gas-supply pipe, is formed with the decoking oil pocket between high temperature tube and the gas-supply pipe, and the intussuseption of decoking oil pocket is filled with tar cracking catalyst, and the entrance connection of high temperature tube has high-temperature air supply equipment, and the exit end of high temperature tube extends to the outside of gas-supply pipe. The utility model discloses be used for reducing the content of tar among the combustible gas that biomass gasification machine produced, improve combustible gas's quality, reduce the pollution degree to the environment when using combustible gas.

Description

Multistage tar removing structure of biomass gasification furnace

Technical Field

The utility model relates to a biomass gasification stove combustible gas processing technology field, concretely relates to biomass gasification stove's multistage tar removal structure.

Background

The biomass comprises natural plants, excrement and urban and rural organic waste and is a non-fossil renewable energy source. Compared with the energy utilization mode of direct combustion of biomass, the biomass is utilized after pyrolysis and gasification, and the method has the advantages of expanded application, pollution reduction, cleanness and high efficiency. However, the biomass pyrolysis gasification technology in China is relatively lagged behind, the conventional biomass pyrolysis gasification treatment equipment mainly adopts a fixed bed gasification furnace and a normal pressure fluidized bed gasification furnace, wherein the fixed bed gasification furnace can generate a large amount of phenol water in the production process, so that the tar content is high, the secondary pollution is serious, the gas yield of a single furnace is small, the heat value of the produced combustible gas is low, and the use is limited; the normal pressure fluidized bed gasification furnace has the defects of large fluctuation range of the temperature in the furnace, difficult control of the production process, poor operation reliability, large heat loss, high carbon content of discharged slag, high nitrogen content in the prepared combustible gas, low heat value, high dust concentration of the fuel gas, difficult purification and the like, and thus, the normal pressure fluidized bed gasification furnace cannot be widely used so far. In addition, because the lignin of the organisms contains tar, the content of the tar in the combustible gas generated after the biomass is combusted is higher, so that the generated combustible gas has peculiar smell and pollutes the environment when in use. The lagging biomass pyrolysis and gasification technology hinders the clean and efficient utilization of biomass energy in China.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a biomass gasification stove's multistage tar removal structure for reduce the content of tar in the combustible gas that biomass gasification machine produced, improve combustible gas's quality, reduce the pollution degree to the environment when using the combustible gas.

In order to solve the technical problem, the utility model discloses a following scheme:

the utility model provides a multistage decoking oil structure of biomass gasification stove, includes the furnace body of vertical setting, including vaporizer, combustion chamber and gas collection chamber in the furnace body, the combustion chamber sets up below and the vaporizer of vaporizer and communicates with each other, and the gas collection chamber sets up in the vaporizer top and communicates with each other, and the furnace body lateral wall is equipped with the gas output tube with the gas collection chamber switch-on, the exit end of gas output tube is connected with the tar filter, and the gas outlet of tar filter is connected with the gas-supply pipe, is equipped with the high temperature tube in the gas-supply pipe, is formed with the decoking oil pocket between high temperature tube and the gas-supply pipe, and the decoking oil pocket intussuseption is filled with tar schizolysis catalyst, and the entrance connection of high temperature tube has high temperature air supply equipment, and the exit end of high temperature tube extends to the outside of gas-supply pipe.

Optionally, the inlet end of the high-temperature pipe vertically penetrates through the side wall of the gas pipe upwards, the outlet end of the high-temperature pipe vertically penetrates through the side wall of the gas pipe downwards, and the contact position of the high-temperature pipe and the gas pipe is welded and sealed.

Optionally, the gas outlet end of the high-temperature pipe extends into a combustion chamber of the furnace body.

Optionally, the portion of the high temperature pipe located in the gas transmission pipe is distributed in a serpentine shape.

Optionally, the side wall of the high-temperature pipe is provided with an injection hole positioned in the gas transmission pipe, and the aperture of the injection hole is 0.5-1mm.

Optionally, the high temperature pipe is provided with circumferences at intervals along the length direction thereof, and each circumference is provided with four jet holes in a cross shape.

Optionally, the tar filter includes box and filter core, and the filter core is along gas flow direction interval distribution in the box, and box one end is equipped with the air inlet, and the other end is equipped with the gas outlet, and the air inlet communicates with the gas output pipe, and the gas outlet communicates with the gas-supply pipe.

Optionally, the filter element is made of a foam nickel block, and the foam nickel block is made of a three-dimensional mesh foam nickel material.

The utility model discloses beneficial effect who has:

1. the utility model discloses in, the combustible gas that biomass gasification stove produced is carried to the tar filter in by the gas output tube, tar in the filter core through inside is elementary to the combustible gas is detached, combustible gas behind the tar filter is carried to the gas transmission intraductal once more, be equipped with the high temperature tube in the gas transmission pipe, be formed with the decoking oil pocket between high temperature tube and the gas transmission intraductal wall, this cavity intussuseption is filled with tar cracking catalyst, high temperature air supply equipment carries high temperature air to the high temperature tube in, the tar-containing combustible gas through the tar filter is at the in-process that flows along the gas transmission pipe, receive the inside thermal effect of high temperature tube, under tar cracking catalyst's catalytic action, the schizolysis reaction takes place for tar, thereby reduce the internal tar content of combustible gas once more, combustible gas's quality has been improved, the pollution degree to the environment when having reduced the use.

2. The high-temperature tube is distributed in the gas transmission tube in a snake shape, so that the contact area of the tar cracking catalyst and the high-temperature tube can be increased, meanwhile, the flow path of the high-temperature gas inside is relatively long, the cracking effect of tar can be better, and the tar content in the combustible gas is further reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a perspective view of a high temperature tube with a section cut away;

fig. 3 is a cross-sectional view of a high temperature tube.

Reference numerals: 1-furnace body, 2-gas collection chamber, 3-gasification chamber, 4-combustion chamber, 5-gas output pipe, 6-box body, 7-filter element, 8-high temperature air supply device, 9-high temperature pipe, 10-gas pipe, 11-decoking oil chamber, 12-gas inlet, 13-gas outlet and 14-jet hole.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and the terms are only for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that, unless otherwise explicitly specified or limited, the terms "disposed," "opened," "mounted," "connected," and "connected" are to be construed broadly, e.g., as either a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

The utility model provides a multistage decoking oil structure of biomass gasification stove, furnace body 1 including vertical setting, including vaporizer 3, combustion chamber 4 and air collecting chamber 2 in the furnace body 1, combustor 4 sets up below and vaporizer 3 at vaporizer 3 and communicates with each other, and air collecting chamber 2 sets up in vaporizer 3 top and communicates with each other, and 1 lateral wall of furnace body is equipped with the gas output tube 5 with the switch-on of air collecting chamber 2, the exit end of gas output tube 5 is connected with the tar filter, and the gas outlet 13 of tar filter is connected with gas-supply pipe 10, is equipped with high temperature tube 9 in the gas-supply pipe 10, is formed with decoking oil pocket 11 between high temperature tube 9 and the gas-supply pipe 10, and the intussuseption of decoking oil pocket 11 is filled with tar cracking catalyst, and the entrance connection of high temperature tube 9 has high-temperature air supply apparatus 8, and the exit end of high temperature tube 9 extends to the outside of gas-supply pipe 10.

In this embodiment, as shown in fig. 1, current biomass gasification stove has combustion chamber 4, gasification chamber 3, collection chamber 2, concrete structure all belongs to prior art, this scheme is on current biomass gasification stove's basis, be connected with the tar filter on its gas output tube 5, tar in the combustible gas can be carried to preliminary filtering, then combustible gas after the filtration is carried to gas-supply pipe 10 again in, be equipped with high-temperature tube 9 in the gas-supply pipe 10, be formed with decoking oil pocket 11 between high-temperature tube 9 and the gas-supply pipe 10 inner wall, this cavity intussuseption is filled with tar cracking catalyst, high-temperature air supply apparatus 8 (prior art) carries high-temperature air to high-temperature tube 9 in, the tar-containing combustible gas that passes through the tar filter is at the flow in-process along gas-supply pipe 10, receive the inside thermal effect of high-temperature tube 9, under the catalytic action of tar cracking catalyst, the pyrolysis reaction takes place for tar, thereby reduce the tar content in the combustible gas that can be internal once more, combustible gas's quality has improved, the pollution degree to the environment when having reduced the use, combustible gas that basically gets rid of tar is carried to other containers and is stored or other equipment are practical.

Further, the inlet end of the high-temperature pipe 9 vertically penetrates through the side wall of the gas conveying pipe 10 upwards, the outlet end of the high-temperature pipe 9 vertically penetrates through the side wall of the gas conveying pipe 10 downwards, and the contact position of the high-temperature pipe 9 and the gas conveying pipe 10 is welded and sealed. Specifically, the high-temperature pipe 9 penetrates through the side wall of the gas conveying pipe 10, and is sealed in a welding mode, so that combustible gas is prevented from leaking out from gaps.

Further, the outlet end of the high temperature pipe 9 extends into the combustion chamber 4 of the furnace body 1. Specifically, the air in the high-temperature tube 9 can enter the combustion chamber 4 in the furnace body 1 again after heat exchange, so as to provide more oxygen for the furnace body 1.

Furthermore, the high-temperature pipe 9 is distributed in a serpentine shape at the part inside the gas pipe 10. Specifically, as shown in fig. 1, the high temperature tube 9 is distributed in the gas transmission tube 10 in a serpentine manner, so that the contact area between the tar cracking catalyst and the high temperature tube 9 can be increased, meanwhile, the flow path of the high temperature gas inside the high temperature tube 9 is relatively long, the cracking effect of tar is better, and the tar content in the combustible gas is further reduced.

Furthermore, the side wall of the high-temperature pipe 9 is provided with a jet hole 14 positioned in the gas pipe 10, and the aperture of the jet hole 14 is 0.5-1mm. Specifically, as shown in fig. 2, the high-temperature air can be ejected from the ejection holes 14 and injected between the tar cracking catalysts, so that the gaps between the tar cracking catalyst particles are increased, which is helpful for increasing the contact area between the tar-containing combustible gas and the tar cracking catalyst particles and promoting the cracking reaction of tar; in addition, the high-temperature air directly contacts with the tar-containing combustible gas, and can exchange heat with the tar-containing combustible gas more fully. In order to prevent the gas content in the combustible gas finally generated from being too high and to spray a proper amount of high-temperature gas, the aperture of the spray hole 14 is designed to be 0.5-1mm.

Furthermore, the high-temperature tube 9 is provided with circumferences at intervals along the length direction thereof, and each circumference is provided with four jet holes 14 in a cross shape. Specifically, as shown in fig. 3, through research, the cracking reaction can be further promoted and the heat exchange can be fully performed based on the distribution mode and the number of the gas injection holes designed above.

Example 2

Further, the tar filter comprises a box body 6 and a filter element 7, the filter element 7 is distributed in the box body 6 at intervals along the gas flowing direction, one end of the box body 6 is provided with a gas inlet 12, the other end of the box body is provided with a gas outlet 13, the gas inlet 12 is communicated with the gas output pipe 5, and the gas outlet 13 is communicated with the gas conveying pipe 10.

Furthermore, the filter element 7 is made of a foam nickel block, and the foam nickel block is made of a three-dimensional net-shaped foam nickel material.

In this embodiment, as shown in fig. 1, the foam nickel piece belongs to prior art, in box 6 along with combustible gas enters into tar filter, along a plurality of filter cores 7 of combustible gas flow direction interval distribution in the box 6, filter core 7 can adopt the mode fixed connection of bonding or joint with 6 inner walls of box all around, when passing through the foam nickel piece along with combustible gas, because the viscidity of tar, the network structure adsorptivity of foam nickel, tar in the combustible gas can be adsorbed and the enrichment is on the foam nickel piece, thereby reach the effect of the internal tar volume of preliminary reduction combustible gas, provide good condition for the follow-up interior tar volume of further reduction combustible gas.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and the technical essence of the present invention is that any simple modification, equivalent replacement, and improvement made to the above embodiments, within the spirit and principle of the present invention, all still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a multistage tar removing structure of biomass gasification stove, furnace body (1) including vertical setting, including vaporizer (3), combustion chamber (4) and gas collection chamber (2) in furnace body (1), combustor (4) set up below and vaporizer (3) of vaporizer (3) and communicate with each other, and gas collection chamber (2) set up in vaporizer (3) top and communicate with each other, and furnace body (1) lateral wall is equipped with gas output tube (5) with gas collection chamber (2) switch-on, a serial communication port, the exit end of gas output tube (5) is connected with the tar filter, and gas outlet (13) of tar filter are connected with gas-supply pipe (10), are equipped with high-temperature tube (9) in gas-supply pipe (10), are formed with between high-temperature tube (9) and gas-supply pipe (10) and remove tar oil pocket (11), and are filled with tar schizolysis catalyst in the decoking oil pocket (11), and the entrance point of high-temperature tube (9) is connected with high-temperature air supply equipment (8), and the exit end of high-temperature tube (9) extends to the outside of gas-supply pipe (10).

2. The multistage tar removing structure of the biomass gasification furnace according to claim 1, wherein the inlet end of the high temperature pipe (9) vertically penetrates through the side wall of the gas transmission pipe (10) upwards, the outlet end of the high temperature pipe (9) vertically penetrates through the side wall of the gas transmission pipe (10) downwards, and the contact position of the high temperature pipe (9) and the gas transmission pipe (10) is welded and sealed.

3. The multi-stage decoking structure of a biomass gasification furnace according to claim 2, characterized in that the outlet end of the high-temperature pipe (9) extends into the combustion chamber (4) of the furnace body (1).

4. The multistage decoking oil structure of the biomass gasification furnace according to claim 2, wherein the part of the high temperature pipe (9) in the gas transmission pipe (10) is distributed in a serpentine shape.

5. The multistage decoking oil structure of the biomass gasification furnace according to claim 4, wherein the side wall of the high-temperature pipe (9) is provided with an injection hole (14) positioned in the gas transmission pipe (10), and the aperture of the injection hole (14) is 0.5-1mm.

6. The multistage decoking oil structure of the biomass gasification furnace according to claim 1, wherein the high temperature pipe (9) is provided with circumferences at intervals along the length direction thereof, and each circumference is provided with four jet holes (14) in a cross shape.

7. The multistage tar removing structure of the biomass gasification furnace according to claim 1, wherein the tar filter comprises a box body (6) and a filter element (7), the filter element (7) is distributed in the box body (6) at intervals along the flowing direction of the fuel gas, one end of the box body (6) is provided with an air inlet (12), the other end of the box body is provided with an air outlet (13), the air inlet (12) is communicated with the fuel gas output pipe (5), and the air outlet (13) is communicated with the gas pipe (10).

8. The multistage decoking oil structure of the biomass gasification furnace according to claim 7, wherein the filter element (7) is made of a nickel foam block, and the nickel foam block is made of a three-dimensional net-shaped nickel foam material.