A methanol liquid gasification device

Abstract

The application discloses a methanol liquid gasification device and belongs to the technical field of fuel gasification equipment. Mainly including tank body, the tank body includes lower tank and upper tank; catalytic tank is installed in the lower tank, the catalytic tank is hollow inside and is equipped with catalyst; spiral coil is located in the lower tank and is coiled on the periphery of the catalytic tank, and the upper end of the spiral coil is communicated with the upper end of the catalytic tank; cyclone type gasification mixing chamber is installed in the upper tank, the cyclone type gasification mixing chamber includes outer cone pipe, the inside of the outer cone pipe is provided with inner cone pipe, and the side of the inner cone pipe is provided with a through port, and the side of the outer cone pipe is provided with an air inlet; venturi is installed between the lower end of the catalytic tank and the air inlet. The methanol liquid gasification device is compact in structure, the methanol can be continuously and stably converted into high-quality synthesis gas, and the gasification efficiency and the reliability of device operation are improved.

Description

Technical Field

[0001] This application relates to the field of fuel gasification equipment technology, specifically a methanol liquid gasification device. Background Technology

[0002] Methanol, as a clean and renewable liquid fuel, is increasingly widely used in industrial kilns, steam boilers and other fields due to its low sulfur content and environmentally friendly combustion products.

[0003] In existing technologies, most methanol vaporization devices are based on a single-stage evaporator structure, which often heats liquid methanol once using a single heat source. This structure may cause some methanol droplets to enter the combustion chamber without being completely vaporized due to uneven heating or insufficient residence time. These unvaporized droplets will produce incomplete combustion products during combustion and will crack and coke due to local high temperature. These cokes will continuously adhere to the heat exchange wall and flow channel, which will easily reduce the heat transfer efficiency and lead to frequent maintenance.

[0004] Therefore, it is necessary to provide a methanol liquid vaporization device to solve the above problems.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0006] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a methanol liquid gasification device with a compact structure, which can continuously and stably convert methanol into high-quality syngas, thereby improving gasification efficiency and device operation reliability.

[0007] The technical solution adopted by this application to solve its technical problem is: a methanol liquid vaporization device, comprising: The tank body includes a lower tank and an upper tank; A catalyst tank is installed inside the lower tank, and the interior of the catalyst tank is hollow and contains a catalyst. A spiral coil is located inside the lower tank and is coiled around the periphery of the catalytic tank, with the upper end of the spiral coil connected to the upper end of the catalytic tank. A cyclone gasification mixing chamber is installed inside the upper tank. The cyclone gasification mixing chamber includes an outer cone tube, an inner cone tube is provided inside the outer cone tube, and an opening is provided on one side of the inner cone tube. An air inlet is installed on one side of the outer cone tube. A venturi tube is installed between the lower end of the catalytic converter and the air inlet.

[0008] Furthermore, the lower tank has an inner cavity, and both the upper and lower sides of the lower tank are fixedly connected to an inlet valve that communicates with the inner cavity. The upper tank has an inner cavity, and both the upper and lower sides of the upper tank are equipped with an inlet valve.

[0009] Furthermore, both inner cavity one and inner cavity two are used to introduce heat-conducting medium, and the temperature of the heat-conducting medium in inner cavity one is higher than the temperature of the heat-conducting medium introduced into inner cavity two.

[0010] Furthermore, an annular tube is fitted around the throat of the Venturi tube, and an inclined tube is wrapped around the annular tube and the Venturi tube. One end of the inclined tube is connected to the annular tube, and the other end corresponds to the throat of the Venturi tube and is connected to the inside of the Venturi tube. The inclined tube is inclined in the same direction as the flow direction of the Venturi tube. An oxygen supply pipe is fixedly connected to one side of the annular tube. The oxygen supply pipe extends out of the upper tank and is equipped with a valve.

[0011] Furthermore, the lower end of the catalytic tank is fixedly connected to a connecting pipe extending out of the tank body. One end of the connecting pipe extends out of the upper tank and is fixedly connected to one end of the venturi tube. A valve is installed on the connecting pipe.

[0012] Furthermore, a material pump is installed on the outside of the tank, and the discharge end of the material pump is fixedly connected to the lower end of the spiral coil through a pipe.

[0013] Furthermore, a gap is left between the inner walls of the inner and outer conical tubes, and an air outlet is fixed at the upper end of the outer conical tube. The upper end of the air outlet penetrates the top of the upper tank, and the part of the air outlet extending out of the upper tank is fixedly connected to an air outlet pipe.

[0014] The beneficial effects of this application are: 1. The methanol liquid gasification device provided in this application integrates a spiral coil pyrolyzer with a central catalytic chamber on the same axis and adopts zoned temperature control. This device achieves efficient operation and graded utilization of thermal energy in the methanol preheating, pyrolysis and catalytic reforming processes. It is not only compact in structure, but also ensures that methanol can be continuously and stably converted into high-quality syngas, thereby improving gasification efficiency and the reliability of device operation.

[0015] The methanol liquid vaporization device provided in this application utilizes the Venturi tube effect to self-absorb oxygen and initially mix it with the catalytically produced gas. Then, it achieves final vaporization and deep mixing through a cyclone vaporization mixing chamber. No additional power is required, which not only ensures the homogeneity, stability and full vaporization of the produced gas, but also effectively reduces the system energy consumption.

[0016] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a methanol liquid vaporization device according to this application; Figure 2 This is a schematic diagram of the internal structure of a methanol liquid vaporization device according to this application; Figure 3 This is a schematic diagram of the cyclone gasification mixing chamber of a methanol liquid gasification device according to this application; Figure 4 This is a cross-sectional schematic diagram of the cyclone gasification mixing chamber of a methanol liquid gasification device according to this application; The following are the labeling elements in the figure: 1. Tank body; 11. Lower tank; 12. Upper tank; 13. Inner cavity one; 14. Inlet valve one; 15. Inlet valve two; 16. Inner cavity two; 2. Feed pump; 3. Catalytic converter; 4. Spiral coil; 5. Venturi tube; 6. Cyclone gasification mixing chamber; 61. Outer cone tube; 62. Air inlet; 63. Air outlet; 64. Inner cone tube; 7. Connecting pipe; 8. Oxygen supply pipe; 9. Ring pipe; 10. Gas outlet pipe. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] like Figure 1-4 As shown, this application provides a methanol liquid vaporization device, including a vertically arranged cylindrical tank 1. The tank 1 includes a lower tank 11 and an upper tank 12, which are fixedly connected and have separate internal spaces.

[0021] A catalytic tank 3 is fixedly installed in the center of the lower tank 11. The catalytic tank 3 is hollow and filled with a solid catalyst (such as a copper-based or nickel-based catalyst) to form a catalytic chamber. A spiral coil 4 is wound around the periphery of the catalytic tank 3. The spiral coil 4 serves as a cracking tube. This spiral coil cracking tube and the catalytic chamber form a coaxial integrated structure, making full use of the space and making the structure compact.

[0022] The lower end of the spiral coil 4 serves as the feed inlet, and the upper end is connected to the top inlet of the catalytic tank 3 through a short connecting pipe located at the top, ensuring that the material must flow through the spiral coil 4 and the catalytic tank 3 in sequence, and the process is smooth; the material pump 2 set on the outside of the tank body 1 is used to pressurize the liquid methanol and stably transport it to the lower inlet of the spiral coil 4.

[0023] To achieve integrated heating with zoned temperature control, a surrounding inner cavity 13 is provided in the shell wall of the lower tank 11, and a surrounding inner cavity 16 is provided in the shell wall of the upper tank 12. The upper and lower ends of the inner cavity 13 are respectively connected to inlet valves 14 for introducing high-temperature heat transfer medium (such as high-temperature heat transfer oil) to provide the high temperature (250-350°C) required for cracking and catalytic reaction in the lower tank 11 (i.e., the high-temperature zone where the spiral coil 4 and the upper part of the catalytic tank 3 are located).

[0024] The upper and lower ends of the inner cavity 16 are respectively connected to the inlet valve 15, which is used to introduce a medium-temperature heat transfer medium to provide the medium temperature (150-200°C) required to maintain the gas state inside the upper tank 12 (i.e., the low-temperature zone where the subsequent gasification mixing unit is located). Through the independent temperature control design, the thermal management of the zone is realized, the energy utilization rate is high, the catalyst can be protected and the reaction efficiency is ensured.

[0025] The upper tank 12 is equipped with a venturi tube 5. The bottom outlet of the catalytic tank 3 is connected to a connecting pipe 7. The connecting pipe 7 extends to the outside of the tank body 1 and bends upward, eventually connecting to the inlet of the venturi tube 5. A valve is installed on the connecting pipe 7 to control the flow.

[0026] A ring tube 9 is fitted around the throat of the Venturi tube 5. The ring tube 9 is connected to the throat of the Venturi tube 5 through multiple inclined tubes evenly distributed around the axis of the Venturi tube 5. The inclination direction of the inclined tubes is consistent with the mainstream direction of the fluid in the Venturi tube 5. An oxygen supply pipe 8 is connected to one side of the ring tube 9. The oxygen supply pipe 8 extends through the wall of the upper tank 12 to the outside and is equipped with a control valve. By setting up the Venturi tube 5, rapid injection and preliminary mixing of oxygen can be achieved.

[0027] A cyclone gasification mixing chamber 6 is installed inside the upper tank 12. The cyclone gasification mixing chamber 6 includes an outer cone tube 61. An air inlet 62 is installed on one side of the outer cone tube 61. The outlet of the venturi tube 5 is connected to the air inlet 62 on the side of the cyclone gasification mixing chamber 6. An inner cone tube 64 is coaxially arranged inside the outer cone tube 61. A gap is left between the inner wall of the inner cone tube 64 and the inner wall of the outer cone tube 61. An opening is opened on the side wall of the inner cone tube 64 so that the inside of the inner cone tube 64 communicates with the annular gap between the outer cone tube 61 and the inner cone tube 64.

[0028] The upper end of the outer cone tube 61 is closed and fixed with an outlet 63. The outlet 63 passes through the top of the upper tank 12 and is connected to the outlet pipe 10 to transport the final vaporized mixed gas to the combustion chamber. This cyclone structure is used to achieve final vaporization and stable flow.

[0029] Working principle: Pump 2 pumps liquid methanol into spiral coil 4. When the methanol flows through spiral coil 4, it is indirectly heated by the high-temperature heat-conducting medium in the inner cavity 13, evaporates and partially decomposes into methanol vapor.

[0030] After preliminary gasification and cracking, methanol vapor enters the top of catalytic converter 3 from the upper end of spiral coil 4 and flows downward through the catalyst bed. Under the action of the catalyst, methanol undergoes a deep reforming reaction to generate syngas, mainly composed of H2 and CO.

[0031] The high-temperature reformed gas flowing out from the bottom of the catalytic tank 3 through the connecting pipe 7 enters the venturi tube 5. The gas flow rate increases when it passes through the throat, generating negative pressure. The oxygen in the ring pipe 9 is automatically drawn in through the inclined pipe and undergoes preliminary mixing in the diffusion section of the venturi tube 5.

[0032] The gas-oxygen mixture enters tangentially from the air inlet 62 into the annular gap between the outer cone tube 61 and the inner cone tube 64 of the cyclone vaporization mixing chamber 6, forming a rotating airflow. The rotation process enhances the mixing effect and provides sufficient residence time to ensure that any possible residual droplets or heavy components are finally vaporized here.

[0033] Finally, the uniformly mixed and vaporized gas enters the interior of the inner cone tube 64 through the side wall opening, and then is stably output from the top outlet 63 and outlet pipe 10 to the combustion chamber.

[0034] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A methanol liquid vaporization device, characterized in that, include: Tank body (1), the tank body (1) includes a lower tank (11) and an upper tank (12); A catalyst tank (3) is installed inside the lower tank (11), and the inside of the catalyst tank (3) is hollow and contains a catalyst; A spiral coil (4) is located inside the lower tank (11) and is coiled around the periphery of the catalyst tank (3), and the upper end of the spiral coil (4) is connected to the upper end of the catalyst tank (3); Cyclone gasification mixing chamber (6) is installed in the upper tank (12). The cyclone gasification mixing chamber (6) includes an outer cone tube (61), an inner cone tube (64) is provided inside the outer cone tube (61), and an opening is provided on one side of the inner cone tube (64). An air inlet (62) is installed on one side of the outer cone tube (61). A venturi tube (5) is installed between the lower end of the catalyst tank (3) and the air inlet (62).

2. The methanol liquid vaporization device according to claim 1, characterized in that: The lower tank (11) has an inner cavity 1 (13) inside. Both the upper and lower sides of the lower tank (11) are fixedly connected to an inlet valve 1 (14) that communicates with the inner cavity 1 (13). The upper tank (12) has an inner cavity 2 (16) inside. Both the upper and lower sides of the upper tank (12) are equipped with an inlet valve 2 (15).

3. The methanol liquid vaporization device according to claim 2, characterized in that: Both the inner cavity one (13) and the inner cavity two (16) are used to introduce heat-conducting media, and the temperature of the heat-conducting media in the inner cavity one (13) is higher than the temperature of the heat-conducting media introduced into the inner cavity two (16).

4. The methanol liquid vaporization device according to claim 1, characterized in that: A ring tube (9) is fitted around the throat of the Venturi tube (5). An inclined tube is wrapped around the ring tube (9) and the Venturi tube (5). One end of the inclined tube is connected to the ring tube (9), and the other end corresponds to the throat of the Venturi tube (5) and is connected to the inside of the Venturi tube (5). The inclined tube is inclined in the same direction as the flow direction of the Venturi tube (5). An oxygen supply pipe (8) is fixedly connected to one side of the ring tube (9). The oxygen supply pipe (8) extends out of the upper tank (12) and a valve is installed on the oxygen supply pipe (8).

5. A methanol liquid vaporization device according to claim 4, characterized in that: The lower end of the catalyst tank (3) is fixedly connected to a connecting pipe (7) extending out of the tank body (1). One end of the connecting pipe (7) extends out of the upper tank (12) and is fixedly connected to one end of the venturi tube (5). A valve is installed on the connecting pipe (7).

6. The methanol liquid vaporization device according to claim 1, characterized in that: A material pump (2) is provided on the outside of the tank (1), and the discharge end of the material pump (2) is fixedly connected to the lower end of the spiral coil (4) through a pipe.

7. A methanol liquid vaporization device according to claim 1, characterized in that: There is a gap between the inner walls of the inner cone tube (64) and the outer cone tube (61). The upper end of the outer cone tube (61) is fixed with an air outlet (63). The upper end of the air outlet (63) penetrates the top of the upper tank (12), and the part of the air outlet (63) extending out of the upper tank (12) is fixedly connected with an air outlet pipe (10).

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