Double-outlet double-section biomass gasifier
By designing a double outlet and double-stage biomass gasification furnace, gases with large dust and moisture and tar are discharged in sections, and different purification equipment are used for segment purification, which solves the high purification cost caused by the mixed gas discharge of traditional biomass gasification furnaces. and difficulty issues, better purification effect is achieved.
Patent Information
- Application Number
- CN202420206812.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-29
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-29
AI Technical Summary
Due to the mixed discharge of gases in the upper and lower sections of traditional biomass gasifiers, the subsequent purification treatment is expensive and difficult to purify, making it difficult to effectively separate moisture, dust and tar.
A double outlet and double section biomass gasification furnace is designed to discharge gas with large dust generated by the lower furnace body, moisture and tar produced by the upper furnace body through porous channels, and divide it with different purification equipment. Purification treatment.
Effective segmented purification of gas is achieved, reducing subsequent purification costs and purification difficulties, improving purification effect, and ensuring smooth gas discharge and flow regulation through reasonable gas collection ring and regulating valve settings.
Smart Images
Figure CN222182181U_ABST
Abstract
Description
Technical Field
[0001] The utility model mainly relates to the technical field related to biomass gasifiers, in particular to a double-outlet double-stage biomass gasifier. Background Art
[0002] Biomass gasifier mainly uses biomass (wood (block) chips, bamboo (block) chips, rice husk briquettes, straw briquettes, etc.) as raw materials, steam, oxygen / air as gasifier (Note: clean gas is oxygen; non-clean gas is air.) Without the need for any external energy and additives, auxiliary agents and other chemicals, the biomass cellulose, hemicellulose, lignin macromolecules are converted into small molecules of biomass combustible gas, small molecules of biomass charcoal and small molecules of liquid through thermochemical reactions. The main combustible components of biomass combustible gas are CO, H2, CH4, and a very small amount of CnHm (n>1). It can be widely used in various fields of industrial and agricultural production, such as power generation, gas supply, heating (replacing coal combustion), etc.
[0003] In the prior art, the lower section of a two-stage biomass gasifier is mainly used for oxidation and reduction of biomass raw materials, and the outlet gas contains a lot of dust, while the upper section is mainly used for pyrolysis and drying of biomass raw materials, and the outlet gas contains a lot of moisture and tar. Traditional biomass gasifiers generally have one outlet, and the gases from the upper and lower sections are mixed and discharged, and moisture, dust and tar are mixed together. Such gases are costly and difficult to purify during subsequent purification treatment. Utility Model Content
[0004] In order to solve the shortcomings of the current technology, the utility model combines the existing technology and, based on practical application, provides a double-outlet double-stage biomass gasification furnace. The gas generated by the upper and lower furnace bodies is discharged in stages. When the gas is subsequently purified, different purification equipment can be used according to the characteristics of the exhaust gas to reduce the subsequent gas purification cost and purification effect.
[0005] To achieve the above purpose, the technical solution of the utility model is as follows:
[0006] A double-outlet double-stage biomass gasification furnace, comprising a furnace body, an ash pan arranged at the lower part of the furnace body, and a material bin arranged at the upper part of the furnace body, wherein the furnace body comprises an upper furnace body and a lower furnace body whose chambers are interconnected;
[0007] The lower furnace body adopts a steel plate tube with a water jacket structure and is provided with a primary air channel. The upper furnace body adopts a steel plate tube structure. A porous channel is provided in the upper furnace body. The lower end of the porous channel is connected to the chamber of the lower furnace body, and the upper end is connected to the lower outlet arranged on one side of the upper furnace body after being converged. The upper outlet is provided at the top of the upper furnace body.
[0008] Furthermore, the upper furnace body and the lower furnace body are both cylindrical structures;
[0009] The porous channels are evenly arranged along the circumference of the inner wall of the upper furnace body, and the lower end of the porous channels is located at the top of the chamber of the lower furnace body.
[0010] Furthermore, a lower gas collecting ring is arranged on the top of the porous channel, an upper gas collecting ring is arranged on the upper part of the lower gas collecting ring, the upper end of the porous channel is connected to the lower gas collecting ring, the lower gas collecting ring is connected to the upper gas collecting ring through several circumferentially arranged pipes, and the lower section outlet is connected to the upper gas collecting ring.
[0011] Furthermore, regulating valves are provided on the pipelines connecting the lower gas collecting ring and the upper gas collecting ring.
[0012] Furthermore, a step is provided in the upper furnace body for installing a lower gas collecting ring.
[0013] Furthermore, the chamber of the lower furnace body includes a pyrolysis chamber and a drying chamber, and the upper outlet is arranged on one side of the top of the pyrolysis chamber.
[0014] Beneficial effects of the utility model:
[0015] 1. In the utility model, a two-stage furnace structure is adopted. The biomass raw material is oxidized and reduced in the lower furnace body, and the generated gas with relatively large dust is discharged from the lower outlet after passing through the porous channel. The biomass raw material is pyrolyzed and dried in the upper furnace body, and the generated gas with large moisture and tar is discharged from the upper outlet. In this way, the gases in the upper and lower furnace bodies are separated, and the gas can be purified in stages through different purification equipment, with good purification effect.
[0016] 2. In the utility model, the porous channels are arranged along the circumference of the inner wall of the furnace body, which does not affect the normal feeding of biomass raw materials. Through the reasonable setting of the gas collecting ring and the regulating valve, the gas in the lower furnace body can be collected and discharged smoothly, and the gas flow rate can be adjusted.
[0017] 3. In the utility model, the lower section outlet is arranged on one side of the upper part of the upper section furnace body, so that the lower section outlet is at a higher position, which can facilitate subsequent dust removal and purification treatment. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Attached Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0019] Attached Figure 2 This is a schematic diagram of the reaction stages of biomass raw materials in the furnace body of the utility model.
[0020] Attached Figure 3 This is a schematic diagram of the main structure of the porous channel of the utility model.
[0021] Attached Figure 4 It is a schematic diagram of the top view of the porous channel structure of the utility model.
[0022] 1. Ash tray; 2. Lower furnace body; 3. Upper furnace body; 4. Porous channel; 5. Regulating valve; 6. Lower opening; 7. Upper opening; 8. Buffer silo; 9. Silo; 10. Lower gas collecting ring; 11. Upper gas collecting ring; 12. Slag layer; 13. Oxidation layer; 14. Reduction layer; 15. Pyrolysis layer; 16. Drying layer. DETAILED DESCRIPTION
[0023] The utility model is further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the utility model and are not used to limit the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by this application.
[0024] refer to Figure 1-Figure 4 The figure shows a schematic diagram of the structure of a double-outlet double-stage biomass gasifier provided in this embodiment.
[0025] like Figure 1 , Figure 2 As shown in the figure, a double-outlet double-stage biomass gasification furnace of this embodiment mainly includes an ash pan 1, a lower furnace body 2, an upper furnace body 3, a buffer silo 8, and a silo 9 arranged from bottom to top. The chambers of the upper furnace body 3 and the lower furnace body 2 are connected, and biomass raw materials are injected into the upper furnace body 3 and the lower furnace body 2 through the silo 9 and the buffer silo 8.
[0026] The lower furnace body 2 is a steel plate cylinder with a water jacket structure. The water jacket structure is used for heating to provide a high temperature and oxygen-deficient environment for the biomass raw materials in the furnace body. A primary air channel is provided at the lower part of the lower furnace body 2 to provide gasification agents - oxygen / air and steam for the biomass raw material gasification process. The lower furnace body 2 is composed of a slag layer 12, an oxidation layer 13 and a reduction layer 14 from bottom to top. The biomass raw materials in the lower furnace body 2 undergo oxidation and reduction stages in sequence.
[0027] The upper furnace body 3 adopts a steel plate cylindrical structure, and the upper furnace body 3 provides a low-temperature pyrolysis and drying environment for the biomass raw materials. A porous channel 4 is arranged inside the upper furnace body 3, wherein the bottom opening of the porous channel 4 is located at the top of the chamber of the lower furnace body 2 and is connected to the lower furnace body 2, and the top openings of the porous channel 4 are connected to the lower opening 6 located on the side of the upper furnace body 3 after being gathered, so that the biomass gas generated by the oxidation and reduction process of the lower stage is discharged from the lower outlet 6 through the porous channel 4.
[0028] As a preferred solution of this embodiment, refer to Figure 3 , Figure 4As shown, the porous channels 4 are evenly arranged along the circumference of the inner wall of the upper furnace body 3. The porous channels 4 can adopt multiple vertical pipes, the bottom of which is suspended and connected to the lower furnace body 2, and the upper part is connected to the opening corresponding to the lower gas collecting ring 10. An upper gas collecting ring 11 is arranged on the upper part of the lower gas collecting ring 10. The lower gas collecting ring 10 is connected to the upper gas collecting ring 11 through several pipes arranged circumferentially. The upper gas collecting ring 11 is connected to the lower opening 6. At the same time, a regulating valve 5 is arranged on each pipe connecting the upper gas collecting ring 11 and the lower gas collecting ring 10 to control the gas flow rate.
[0029] In the above structure of the present embodiment, the biomass gas generated in the lower furnace body 2 is collected into the upper gas collecting ring 11 through the porous channel 4, and then enters the upper gas collecting ring 11 through the pipeline and the regulating valve 5, and finally discharged from the lower opening 6. In this structure, a corresponding step installation position can be set in the upper furnace body 3 for installing the upper gas collecting ring 11 and the lower gas collecting ring 10.
[0030] From bottom to top, there are a pyrolysis layer 15 and a drying layer 16 in the upper furnace body 3 . The biomass raw material undergoes pyrolysis and drying stages in the upper furnace body 3 , and the pyrolysis gas is discharged through an upper outlet 7 arranged on the top surface of the upper furnace body 3 .
[0031] Preferably, the lower opening 6 arranged on one side of the upper furnace body 3 can be placed in a relatively high position. In the figure, the lower opening 6 is located below the drying layer 16 and on the top of the pyrolysis layer 15 in the height direction. The higher position of the lower opening 6 facilitates the installation of the purification equipment when purifying the gas. Since the dust in the gas discharged from the lower opening 6 is relatively large, the purification equipment can be installed in a lower position to facilitate the landing and treatment of the dust.
[0032] The dual-outlet dual-stage biomass gasifier provided in this embodiment has an upper outlet 7 and a lower outlet 6. The advantage of this is that it can be purified in stages. The gas at the upper outlet 7 contains more moisture and tar, while the gas at the lower outlet 6 contains more dust. In this way, it can be controlled in stages, and different purification equipment can be used to purify the gas later.
Claims
1. A double-outlet double-stage biomass gasification furnace, comprising a furnace body, an ash pan arranged at the lower part of the furnace body, and a silo arranged at the upper part of the furnace body. It is characterized in that The furnace body comprises an upper furnace body and a lower furnace body whose chambers are interconnected; The lower furnace body adopts a steel plate tube with a water jacket structure and is provided with a primary air channel. The upper furnace body adopts a steel plate tube structure. A porous channel is provided in the upper furnace body. The lower end of the porous channel is connected to the chamber of the lower furnace body, and the upper end is connected to the lower outlet arranged on one side of the upper furnace body after being converged. The upper outlet is provided at the top of the upper furnace body.
2. The double-outlet double-stage biomass gasifier according to claim 1, It is characterized in that The upper furnace body and the lower furnace body are both cylindrical structures; The porous channels are evenly arranged along the circumference of the inner wall of the upper furnace body, and the lower end of the porous channels is located at the top of the chamber of the lower furnace body.
3. The double-outlet double-stage biomass gasifier according to claim 2, It is characterized in that A lower gas collecting ring is arranged on the top of the porous channel, an upper gas collecting ring is arranged on the upper part of the lower gas collecting ring, the upper end of the porous channel is connected to the lower gas collecting ring, the lower gas collecting ring is connected to the upper gas collecting ring through a plurality of circumferentially arranged pipes, and the lower section outlet is connected to the upper gas collecting ring.
4. The double-outlet double-stage biomass gasifier according to claim 3, It is characterized in that Regulating valves are arranged on the pipelines connecting the lower gas collecting ring and the upper gas collecting ring.
5. The double-outlet double-stage biomass gasifier according to claim 3, It is characterized in that The upper furnace body is provided with a step for installing the lower gas collecting ring.
6. The double-outlet double-stage biomass gasifier according to claim 1, It is characterized in that The chamber of the lower furnace body includes a pyrolysis chamber and a drying chamber, and the upper outlet is arranged on one side of the top of the pyrolysis chamber.