Electromagnetic induction heating biomass gasifier

Abstract

The utility model relates to the technical field of biomass gasification furnaces, in particular to an electromagnetic induction heating biomass gasification furnace. Comprising a furnace body, a hearth is arranged in the furnace body, an electromagnetic induction heating device is arranged at the bottom of the furnace body, the electromagnetic induction heating device comprises a heating section and a heat dissipation section, the heat dissipation section extends into the hearth, and a gas inlet is formed in the heating section. Through the arrangement of the electromagnetic induction heating device, only air or high-purity oxygen with certain pressure needs to be conveyed to the heating section, after being heated according to the electromagnetic induction principle, the air or the high-purity oxygen enters the hearth through the heat dissipation section to heat biomass, crude synthesis gas such as CO, CO2 and H2 is generated, external fuel does not need to be used for ignition, the gasification conversion rate is high, and energy is saved. New energy such as wind and light can be consumed on site for power generation, and external fuel cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass gasifiers, in particular to an electromagnetic induction heating biomass gasifier. Background Art

[0002] As a clean energy, biomass has the characteristics of wide sources, large reserves, and dispersion. The way to use biomass as energy also includes a variety of technical routes, among which biomass gasification is a main form of thermochemical process, and gasifier is the core of biomass gasification process. The current mainstream gasifier types include fixed bed gasifier and fluidized bed gasifier. The heating method of these two gasifiers generally adopts fuel ignition, and then burns part of the biomass to increase the temperature in the furnace, so as to achieve pyrolysis and gasification of biomass. This heating method requires external fuel, and sacrifices part of the organic matter of the biomass as fuel to maintain the temperature in the furnace, which increases the cost of external fuel and reduces the effective gas conversion rate of biomass. Therefore, the utility model is proposed. Utility Model Content

[0003] The purpose of the utility model is to provide an electromagnetic induction heating biomass gasifier, which does not require the use of external fuel for heating and does not sacrifice part of the biomass as fuel. The biomass gasification conversion rate is high, and green electricity such as wind and solar power can be used for heating, thereby promoting the local consumption of new energy and saving external fuel costs.

[0004] The utility model provides an electromagnetic induction heating biomass gasification furnace, comprising a furnace body, a furnace chamber is arranged inside the furnace body, an electromagnetic induction heating device is arranged at the bottom of the furnace body, the electromagnetic induction heating device comprises a heating section and a heat dissipation section, the heat dissipation section extends into the furnace chamber, and the heating section is provided with a gas inlet.

[0005] Furthermore, the heating section comprises a first cylinder, an alloy conductor is arranged inside the first cylinder, an insulating and heat-preserving layer is arranged outside the first cylinder, and an induction coil is arranged outside the insulating and heat-preserving layer.

[0006] Furthermore, the alloy conductor is cylindrical in shape, and a plurality of heat dissipation units are provided on the outer peripheral wall of the alloy conductor along the vertical direction; each of the heat dissipation units includes four evenly distributed fins.

[0007] Furthermore, the heat dissipation section includes a second cylinder connected to the first cylinder, and a plurality of air distribution ports are provided on the side wall of the second cylinder, and the opening direction of the air distribution ports faces downward.

[0008] Furthermore, a sealing head is provided on the top of the second cylinder, the sealing head is located outside the furnace body, and an exhaust port is provided on the top of the sealing head.

[0009] Furthermore, the first cylinder body and the second cylinder body are integrally formed, and a sealing partition is provided on the upper portion of the first cylinder body.

[0010] Furthermore, the sealing baffle is sleeved on the alloy conductor, and the sealing baffle comprises two sector plates that can form a circular ring shape, and the sector plates are rotatably connected to the first cylinder.

[0011] Furthermore, a rotating shaft passes through the side wall of the fan-shaped plate, and both ends of the rotating shaft are rotatably connected to the first cylinder. A driving mechanism is provided outside the first cylinder, and an output end of the driving mechanism is fixedly connected to one end of the rotating shaft.

[0012] Furthermore, a synthesis gas outlet is provided at the top of the furnace body, a feed port is provided at the side wall of the furnace body, and an ash outlet is provided at the lower part of the furnace body; a grate is provided at the bottom of the furnace, and an insulation layer is provided on the inner wall of the furnace.

[0013] Furthermore, a plurality of evenly distributed support frames are provided at the bottom of the furnace body.

[0014] In summary, compared with the prior art, the utility model has the following advantages:

[0015] The technical solution of the utility model, through the electromagnetic induction heating device, only needs to deliver air or high-purity oxygen of a certain pressure to the heating section. After heating by the electromagnetic induction principle, the biomass enters the furnace through the heat dissipation section to heat the biomass, generating crude synthesis gas such as CO, CO2 and H2. There is no need to use external fuel for ignition, nor to sacrifice part of the biomass as fuel. The gasification conversion rate is high, and new energy power generation such as wind and solar power can be consumed locally, saving external fuel costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the biomass gasifier in Example 1 of the utility model;

[0018] Figure 2 This is a top view of the biomass gasifier in Example 1 of the utility model;

[0019] Figure 3 It is a top view of the heating section in Example 2 of the utility model.

[0020] Explanation of the reference numerals: 1-furnace body; 101-furnace chamber; 102-feed port; 103-ash outlet; 104-grate; 105-synthesis gas outlet; 106-manhole; 107-insulation layer; 2-heating section; 201-first cylinder; 202-insulation layer; 203-induction coil; 204-alloy conductor; 205-fin; 206-fixed bracket; 207-gas inlet; 3-heat dissipation section; 301-second cylinder; 302-air distribution port; 303-exhaust port; 4-fan plate; 5-driving mechanism; 6-rotating shaft; 7-support frame. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Example 1

[0025] An electromagnetic induction heating biomass gasifier, such as Figure 1 and Figure 2 As shown, it includes a furnace body 1, a furnace chamber 101 is provided inside the furnace body 1, a syngas outlet 105 connected to the furnace chamber 101 is provided at the top of the furnace body 1, and two feed ports 102 are symmetrically provided at the upper part of the side wall of the furnace body 1; a grate 104 is provided at the bottom of the furnace chamber 101, and the grate 104 adopts a conventional grate made of high-temperature resistant material in the field, and the gap of the grate is adjusted according to the size of the biomass material, with the basic requirement of not falling the raw materials. Two ash outlets 103 are provided at the lower part of the furnace body 1, and a manhole 106 is provided at the lower part of the side wall of the furnace body 1.

[0026] An electromagnetic induction heating device is provided at the bottom of the furnace body 1, and the electromagnetic induction heating device includes a heating section 2 and a heat dissipation section 3. The heating section 2 is located at the bottom of the furnace body 1, and the heat dissipation section 3 extends into the furnace chamber 101 through the bottom wall of the furnace body 1. The heating section 2 includes a first cylinder 201, which is made of high-temperature resistant stainless steel. The outside of the first cylinder 201 is wrapped with an insulating and heat-insulating layer 202, and the induction coil 203 is wound around the outside of the insulating and heat-insulating layer 202. The insulating and heat-insulating layer 202 is made of materials such as polyurethane and ceramics in the prior art.

[0027] A cylindrical alloy conductor 204 is provided inside the first cylinder 201. A plurality of fixing brackets 206 for fixing the alloy conductor 204 are welded on the inner wall of the first cylinder 201. A plurality of heat dissipation units are provided on the outer peripheral wall of the alloy conductor 204 in the vertical direction. The heat dissipation units include four fins 205 evenly fixed on the same plane. The arrangement height of the heat dissipation units is consistent with the winding height of the induction coil 203 and are located on the same horizontal plane. In this embodiment, the bottom of the first cylinder 201 is an open structure. The annular space between the bottom of the first cylinder 201 and the bottom of the alloy conductor 204 is a gas inlet 207, which is used to introduce air or oxygen at a certain pressure, and enter the furnace 101 to pyrolyze the biomass after heating. When in use, the bottom of the first cylinder 201 is connected to the gas delivery device through a gas delivery pipeline.

[0028] The heat dissipation section 3 includes a second cylinder 301 connected to the first cylinder 201. A plurality of air outlets 302 are arranged on the outer peripheral wall of the second cylinder 301 in the vertical direction. The air outlets 302 are circular in shape and open downward to avoid blockage of the air outlets 302 when biomass is fed. A circular end cap is fixed on the top of the second cylinder 301. The end cap is located outside the furnace body 1. An exhaust port 303 is arranged at the center of the top of the end cap for hot air discharge. A regulating valve can be installed at the exhaust port 303 to adjust the exhaust according to the content of the synthesis gas (CO, H2, CO2 and other gases). In the utility model, the first cylinder 201 and the second cylinder 301 are integrally formed. When installed, the second cylinder 301 is welded at the contact position with the bottom wall of the furnace body 1. The center lines of the first cylinder 201, the second cylinder 301 and the alloy conductor 204 are aligned with the center line of the furnace 101.

[0029] In this embodiment, the furnace body 1 is cylindrical, and three support frames 7 are welded to its bottom. The material of the support frames 7 is the same as that of the furnace body 1, and the three support frames 7 are evenly distributed along the edge of the bottom of the furnace body 1. In this embodiment, an insulating layer 107 is provided on the inner wall of the furnace chamber 101. The insulating layer 107 is made of high temperature resistant ceramic fiber.

[0030] The method of using the electromagnetic induction heating biomass gasifier provided in this embodiment is as follows: first, add biomass raw materials into the furnace 101 through the feed port 102, energize the induction coil 203 to start the heating section 2, and then deliver air or high-purity oxygen at a certain pressure through the gas inlet 207 (a blower can be used to deliver air or high-purity oxygen with a pressure of 2-5 bar). The air or oxygen in the heating section 2 undergoes convection heat exchange with the alloy conductor 204 and absorbs the radiation heat from the fins 205. The temperature increases, and the heat is transferred to the furnace 101 through the air outlet 302 of the heat dissipation section 3 to heat the biomass. The biomass undergoes pyrolysis and gasification at the corresponding temperature, and finally generates crude synthesis gas such as CO, CO2 and H2, which is discharged from the furnace 101 through the synthesis gas outlet 105 and enters the downstream for further utilization. After the biomass is pyrolyzed and gasified, the inorganic part is discharged as ash through the ash outlet 103.

[0031] Example 2

[0032] An electromagnetic induction heating biomass gasification furnace, the technical solution of this embodiment is basically the same as that of embodiment 1, except that: (1) infrared temperature detection devices are respectively installed at the upper part and the middle part of the first cylinder body for detecting the heating temperature of the heating section 2; (2) a sealing baffle is installed at the upper part of the first cylinder body 201, and the sealing baffle is located above the induction coil 203. The sealing baffle is driven to open or close by a driving mechanism 5 installed outside the first cylinder body 201.

[0033] Turn on the infrared temperature detection device. When the air or oxygen in the heating section 2 is heated to above 700°C, open the sealed partition to allow the heated air or oxygen to enter the heat dissipation section 3. Figure 3As shown, the sealing baffle in this embodiment is annular and is sleeved on the outside of the alloy conductor 204. The sealing baffle includes two fan-shaped plates 4. The side walls of the fan-shaped plates 4 are penetrated by a rotating shaft 6. The two ends of the rotating shaft 6 are rotatably connected to the inner wall of the first cylinder 201. A mounting bracket is fixed to the outside of the first cylinder 201, and a driving mechanism 5 is placed on the mounting bracket. The output end of the driving mechanism 5 is fixedly connected to one end of the rotating shaft 6. The driving mechanism 5 can adopt a motor in the prior art or other equipment that can drive the rotating shaft 6 to rotate. When it is necessary to open the sealing baffle, the driving mechanism 5 is started, and the driving mechanism 5 drives the rotating shaft 6 to rotate, thereby driving the fan-shaped plate 4 to flip, so that the heating section 2 is connected with the heat dissipation section 3, so that the heated air or oxygen enters the heat dissipation section 3. When designing and installing the fan-shaped plates 4, the two fan-shaped plates 4 can only be rotated upward to open and rotated downward to close. Two limit blocks can be installed on the alloy conductor 204, and the two limit blocks are respectively located at the bottom of the fan-shaped plates 4, thereby ensuring that the fan-shaped plates 4 can only be opened upward and can be completely closed when closed; and high-temperature resistant sealing rings can be added to the gaps where the fan-shaped plates 4 contact the first cylinder 201 and the contact edges of the two fan-shaped plates 4 to increase the sealing performance.

[0034] The method of using the electromagnetic induction heating biomass gasifier provided in this embodiment is as follows: first, add biomass raw materials into the furnace 101 through the feed port 102, energize the induction coil 203 to start the heating section 2, and then deliver air or high-purity oxygen of a certain pressure through the gas inlet 207. After the air or oxygen is convectively exchanged with the alloy conductor 204 inside the heating section 2 and absorbs the radiation heat of the fins 205, the temperature rises to above 700°C, the sealing partition is opened by the driving mechanism 5, and the heated air or oxygen enters the heat dissipation section 3, and the heat is transferred to the furnace 101 through the air distribution port 302 of the heat dissipation section 3 to heat the biomass. The biomass undergoes pyrolysis and gasification at the corresponding temperature, and finally generates crude synthesis gas such as CO, CO2 and H2, which is discharged from the furnace 101 through the synthesis gas outlet 105 and enters the downstream for further utilization; after the biomass is pyrolyzed and gasified, the inorganic part is discharged as ash through the ash outlet 103.

[0035] The electromagnetic induction heating biomass gasification furnace provided by the utility model provides a new heat source for biomass pyrolysis and gasification by adopting the electromagnetic induction principle through the electromagnetic induction heating device. No external fuel is required for heating, and no part of the biomass needs to be sacrificed as fuel. The biomass gasification conversion rate is significantly improved, and the utility model has strong practicality.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An electromagnetic induction heating biomass gasifier, characterized in that: The invention comprises a furnace body (1), wherein a furnace chamber (101) is provided inside the furnace body (1), an electromagnetic induction heating device is provided at the bottom of the furnace body (1), the electromagnetic induction heating device comprises a heating section (2) and a heat dissipation section (3), the heat dissipation section (3) extends into the furnace chamber (101), and the heating section (2) is provided with a gas inlet (207).

2. The biomass gasifier according to claim 1, characterized in that: The heating section (2) comprises a first cylinder (201), an alloy conductor (204) is arranged inside the first cylinder (201), an insulating and heat-preserving layer (202) is arranged outside the first cylinder (201), and an induction coil (203) is arranged outside the insulating and heat-preserving layer (202).

3. The biomass gasifier according to claim 2, characterized in that: The alloy conductor (204) is cylindrical in shape, and a plurality of heat dissipation units are provided on the outer peripheral wall of the alloy conductor (204) in the vertical direction; each of the heat dissipation units comprises four evenly distributed fins (205).

4. The biomass gasifier according to claim 2, characterized in that: The heat dissipation section (3) comprises a second cylinder (301) connected to the first cylinder (201), and a plurality of air distribution ports (302) are provided on the side wall of the second cylinder (301), and the opening direction of the air distribution ports (302) faces downward.

5. The biomass gasifier according to claim 4, characterized in that: The top of the second cylinder (301) is provided with a sealing head, the sealing head is located outside the furnace body (1), and the top of the sealing head is provided with an exhaust port (303).

6. The biomass gasifier according to claim 4, characterized in that: The first cylinder (201) and the second cylinder (301) are integrally formed, and a sealing partition is provided on the upper portion of the first cylinder (201).

7. The biomass gasifier according to claim 6, characterized in that: The sealing baffle is sleeved on the alloy conductor (204), and the sealing baffle comprises two sector plates (4) that can form a circular ring shape. The sector plates (4) are rotatably connected to the first cylinder (201).

8. The biomass gasifier according to claim 7, characterized in that: A rotating shaft (6) passes through the side wall of the fan-shaped plate (4), and both ends of the rotating shaft (6) are rotatably connected to the first cylinder (201); a driving mechanism (5) is provided outside the first cylinder (201), and an output end of the driving mechanism (5) is fixedly connected to one end of the rotating shaft (6).

9. The biomass gasifier according to claim 1, characterized in that: The top of the furnace body (1) is provided with a synthesis gas outlet (105), the side wall of the furnace body (1) is provided with a feed port (102), and the lower part of the furnace body (1) is provided with an ash outlet (103); the bottom of the furnace (101) is provided with a grate (104), and the inner wall of the furnace (101) is provided with an insulation layer (107).

10. The biomass gasifier according to claim 1, characterized in that: The bottom of the furnace body (1) is provided with a plurality of evenly distributed support frames (7).

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