Biogas cracking hydrogen production coil reaction device

Abstract

The invention discloses a biogas cracking hydrogen production coil reaction device, and belongs to the technical field of biogas hydrogen production devices. Comprising a purifier, a raw material gas preheater, a reformer, a conversion coil pipe, a mixed gas heater and a steam generator, the purifier is used for treating biomass biogas, the preheater is used for heating raw material gas, the reformer carries out cracking hydrogen production through the spiral coil pipe and a catalyst, and the steam generator generates water vapor through flue gas waste heat. A traditional straight pipe structure is replaced with the conversion coil pipe structure, the conversion coil pipe has a large reaction area under the same height, heat transfer and reaction control can be more effectively carried out in the hydrogen production process, the equipment height is reduced, the equipment size is reduced, and miniaturization design is achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of biogas hydrogen production devices, and specifically relates to a biogas cracking hydrogen production coil reaction device. Background Art

[0002] In the traditional biogas hydrogen production structure, the converter adopts a square tube furnace (negative pressure furnace) and top burning. The converter tube is a straight tube, and the reaction raw materials are passed into the converter tube. The converter tube is a high-temperature medium-pressure furnace tube heated by direct flame. The maximum temperature of the converter tube wall is as high as thousands of degrees Celsius; the heat required for the converter tube reaction is mainly provided by the fuel gas after burning through the furnace top burner. The tube is filled with catalysts, and preheated biogas and high-temperature and high-pressure process steam are passed into the tube to produce catalytic cracking reactions. The converted gas obtained by the reaction is led to the next step of hydrogen production through a pipeline. In the straight conversion tube, biogas and water vapor mainly react to generate hydrogen and carbon monoxide under the action of the catalyst.

[0003] However, the existing ones have the following defects: 1. In the entire system, the converter is high and the converter tube is long, so the skid-mounted equipment is bulky and not conducive to miniaturization.

[0004] 2. The skid-mounted device is large in size, difficult to transport and troublesome to install.

[0005] 3. It occupies a large area and has high investment cost.

[0006] In order to solve the above technical problems, the present application proposes a biogas cracking hydrogen production coil reaction device. Summary of the invention

[0007] The present application provides a biogas cracking hydrogen production coil reaction device, which solves the problems of the existing biogas hydrogen production converter and the long conversion straight pipe, and the large area occupied by the hydrogen production equipment.

[0008] The present application provides a biogas cracking hydrogen production coil reaction device, which adopts the following technical solutions, including: A purifier, the input end of which is connected to a biomass methane output source through a pipeline, and the output end of which is connected to an output pipe; The output pipe is connected with an output branch pipe 1 and an output branch pipe 2; A raw gas preheater, whose input end is connected to an output branch pipe, and whose output end is connected to a mixed gas heater through a pipeline; The converter has three air inlets on the top and an air outlet on the bottom. The output branch pipe 2 is connected to one of the air inlets, and the other two air inlets are respectively connected to a desorption gas output source and an air output source. A converter coil is provided inside the converter, and the converter coil is provided with a converter tube inlet and a converter tube outlet. The output end of the mixed gas heater is connected to the converter tube inlet through a pipeline. The outlet of the conversion tube is connected to a mixed gas heater and a raw gas preheater in sequence through a pipeline, and finally the hydrogen-rich conversion gas is discharged through the pipeline; The gas outlet is connected to a steam generator, and the steam generator is provided with a water vapor output end and a smoke output end, the water vapor output end is connected to a steam drum through a pipeline, and the smoke output end discharges the smoke through the pipeline; The preheated desalted water output source passes through a pipeline and a steam drum, wherein the steam drum is provided with a steam drum output end, and the steam drum output end is connected to the pipeline between the mixed gas heater and the raw gas preheater through a pipeline.

[0009] Furthermore, the reformer also includes a cover and a reformer body.

[0010] Furthermore, the middle section of the conversion coil is a spiral coil filled with a catalyst.

[0011] Furthermore, the conversion furnace body is a circular furnace, and the conversion coil is fixed inside the conversion furnace body through a sealing cover.

[0012] Furthermore, there are multiple conversion coils, which are arranged on the cover in a circular array.

[0013] Furthermore, the conversion coil is made of high temperature resistant and corrosion resistant alloy steel or stainless steel.

[0014] Furthermore, a safety distance is left between the conversion coils.

[0015] Furthermore, a safety distance is left between the conversion coil and the outer wall of the conversion furnace.

[0016] Beneficial effects of this application:

[0017] 1. Miniaturized design: By replacing the traditional straight tube structure with a spiral coil structure, the spiral coil has a larger reaction area at the same height, which can more effectively transfer heat and control reactions during the hydrogen production process, reduce the height of the equipment, and thus reduce the volume of the equipment, achieving a miniaturized design. This makes the device easier to transport and install, and is suitable for applications of different scales and sites, especially for occasions with limited space.

[0018] 2. Improve conversion efficiency: The spiral coil structure has a larger heat exchange area and a more uniform bed temperature distribution, which is conducive to improving conversion efficiency, increasing hydrogen production, and improving energy utilization. This means that with the same raw gas input, more hydrogen can be obtained, thereby improving economic benefits.

[0019] 3. Energy saving and environmental protection: The spiral coil structure improves energy utilization efficiency, reduces fuel consumption, and reduces flue gas emissions, which has the advantages of energy saving and environmental protection. This is of great significance for achieving sustainable development goals.

[0020] 4. Reduce investment costs: The small-scale design reduces land costs and infrastructure construction costs, thereby reducing the total investment of the project and improving the economic benefits of the project. This makes biogas hydrogen production technology more competitive in the market and is conducive to its promotion and application.

[0021] 5. Improve catalyst utilization: The spiral coil structure is conducive to the uniform distribution of catalyst fillers, avoids gas bias, improves catalyst utilization, and extends catalyst life. This reduces operating costs and improves the long-term stability of the device.

[0022] 6. Enhanced safety: A safe distance is left between the conversion coils and between the conversion coils and the outer wall of the conversion furnace, which effectively prevents the tube wall contact and heat concentration problems that may occur under high temperature, and improves the safety of the device.

[0023] 7. The converter is a circular furnace, and the converter tubes are spiral coils, which are arranged in an orderly manner inside the converter. The special structure of the spiral coils enables the fluid to produce a strong turbulent effect when flowing in the tubes, thereby enhancing the heat exchange effect, increasing energy utilization efficiency, reducing fuel use, and reducing flue gas volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] For ease of explanation, the present application is described in detail through the following specific implementations and drawings.

[0025] Figure 1 It is a schematic diagram of the structure of this application; Figure 2 It is a structural schematic diagram of the reformer of the present application; Figure 3 is a top view of the converter of the present application; Figure 4 It is a schematic diagram of the structure of the conversion coil of this application.

[0026] In the figure: 1. Purifier; 2. Biomass methane output source; 3. Output pipe; 4. Output branch pipe 1; 5. Output branch pipe 2; 6. Raw material preheater; 7. Mixed gas heater; 8. Converter; 9. Analysis gas output source; 10. Air output source; 11. Converter coil; 12. Converter tube inlet; 13. Converter tube outlet; 14. Steam generator; 15. Steam drum; 16. Cover; 17. Converter body; 18. Preheated desalted water output source. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present application and the accompanying drawings to further describe the technical solutions of the present application, but the present application is not limited to these embodiments; in the following description, specific details such as specific configurations and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted.

[0028] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other.

[0029] like Figure 1 The specific embodiment of the biogas cracking hydrogen production coil reaction device shown in the figure comprises: the input end of the purifier 1 is connected to the biomass biogas output source 2 through a pipeline, the output end of the purifier 1 is connected to the output pipe 3, the output pipe 3 is connected to the output branch pipe 1 4 and the output branch pipe 2 5; the input end of the raw gas preheater 6 is connected to the output branch pipe 1 4, and the output end of the raw gas preheater 6 is connected to the mixed gas heater 7 through a pipeline; the converter 8 is provided with three air inlets on the top and an air outlet on the bottom, the output branch pipe 2 5 is connected to one of the air inlets, and the other two air inlets are respectively connected to the analytical gas output source 9 and the air output source 10, the air output source 10 outputs preheated air, and the converter 8 is provided with a conversion coil 1 inside. 1, the conversion coil 11 is provided with a conversion tube inlet 12 and a conversion tube outlet 13; the output end of the mixed gas heater 7 is connected to the conversion tube inlet 12 through a pipeline; the conversion tube outlet 13 is connected to the mixed gas heater 7 and the raw gas preheater 6 in sequence through a pipeline, and finally the hydrogen-rich conversion gas is discharged through the pipeline; the gas outlet is connected to the steam generator 14, the steam generator 14 is provided with a water vapor output end and a flue gas output end, the water vapor output end is connected to the steam drum 15 through a pipeline, and the flue gas output end discharges the flue gas through the pipeline; the preheated desalted water output source 18 is connected to the steam drum 15 through a pipeline, the steam drum 15 is provided with a steam drum output end, and the steam drum 15 output end is connected to the pipeline between the mixed gas heater 7 and the raw gas preheater 6 through a pipeline.

[0030] Specifically, after the biomass gas is processed by the purifier 1, the methane content in the obtained raw gas is very high. After being heated by the raw gas preheater 6 and the mixed gas heater 7, a cracking and hydrogen production reaction is carried out in the conversion coil 11 in the converter 8 to obtain hydrogen-rich conversion gas, and 99.999% hydrogen is obtained through subsequent separation.

[0031] Specifically, the heat in the conversion process is provided by the purified biomass methane and analytical gas, and the preheated air is burned in the converter 8 to generate high-temperature flue gas. On the one hand, the heat of the generated high-temperature flue gas is used to generate water vapor. After the water vapor passes through the steam drum 15, it is added to the pipeline between the raw material preheater 6 and the mixed gas heater 7. On the other hand, the flue gas is used to preheat the air, so that the flue gas preheating is fully utilized, and the flue gas is discharged through the pipeline.

[0032] Specifically, Figure 2 and Figure 3 As shown, the converter 8 also includes a cover 16 and a converter body 17. The cover 16 fixes the converter coil 11 in the converter 8. The cover 16 plays a role of sealing and airtightness. The middle section of the converter coil 11 is a spiral coil filled with catalyst. The converter body 17 is a circular furnace.

[0033] Specifically, the reformer 8 is a circular furnace, and the middle section of the reformer coil 11 is a spiral coil, which is orderly arranged inside the reformer 8. The special structure of the spiral coil enables the fluid to produce a strong turbulent effect when flowing in the tube, thereby enhancing the heat exchange effect. Energy utilization efficiency is increased, fuel use is reduced, and flue gas volume is reduced.

[0034] Specifically, Figure 4 As shown, the middle section of the conversion coil 11 is changed from a straight tube to a spiral coil, which reduces the height of the straight tube and the height of the conversion furnace, and can greatly reduce the volume of the biogas hydrogen production skid-mounted equipment. A plurality of conversion coils 11 can be installed inside the conversion furnace 8, which greatly provides a reaction space for the reaction, has a compact structure, and occupies a small area. After the manufacturer completes the installation, it is shipped to the production site, occupies a small area, and the equipment is light and can be directly produced.

[0035] Specifically, the conversion coil 11 is a spiral coil structure, which is conducive to the addition of catalyst fillers, avoids gas deviation in the catalyst bed, and increases the life of the catalyst.

[0036] Specifically, in the reformer 8, the spiral coil is used as a heat exchanger and a reactor. The medium in the spiral coil is heated by the heat generated by the combustion of the fuel, and then a chemical reaction occurs to produce hydrogen. The spiral coil has good heat exchange performance, which can ensure that the low-temperature medium is quickly heated to the reaction temperature after entering the pipeline, thereby starting a chemical reaction.

[0037] Specifically, the conversion coil 11 is made of high temperature resistant and corrosion resistant alloy steel or stainless steel to ensure that it can operate stably in a harsh environment of high temperature and high pressure.

[0038] In other preferred embodiments, there are multiple conversion coils 11 , which are arranged on the cover 16 in a circular array.

[0039] Specifically, Figure 3As shown, the conversion coils 11 are arranged in an equilateral triangle on the cover 16, and multiple conversion coils 11 can be installed inside the conversion furnace 8, which greatly provides reaction space for the reaction, has a compact structure, and occupies a small area.

[0040] In other preferred embodiments, a safety distance is left between the conversion coils 11 , and a safety distance is left between the conversion coils 11 and the outer wall of the conversion furnace 8 .

[0041] Specifically, a safe distance is left between the conversion coils 11 and between the conversion coils 11 and the outer wall of the conversion furnace 8, which effectively prevents the tube wall contact and heat concentration problems that may occur under high temperature, thereby improving the safety of the device.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] In the description of the present application, it should be understood that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] Those skilled in the art to which the present application belongs may make various modifications or additions to the described specific embodiments or replace them in a similar manner, but they will not deviate from the spirit of the present application or exceed the scope defined by the attached claims.

Claims

1. A biogas cracking hydrogen production coil reaction device, characterized in that: include: A purifier, the input end of which is connected to a biomass methane output source through a pipeline, and the output end of which is connected to an output pipe; The output pipe is connected with an output branch pipe 1 and an output branch pipe 2; A raw gas preheater, whose input end is connected to an output branch pipe, and whose output end is connected to a mixed gas heater through a pipeline; The converter has three air inlets on the top and an air outlet on the bottom. The output branch pipe 2 is connected to one of the air inlets, and the other two air inlets are respectively connected to a desorption gas output source and an air output source. A converter coil is provided inside the converter, and the converter coil is provided with a converter tube inlet and a converter tube outlet. The output end of the mixed gas heater is connected to the converter tube inlet through a pipeline. The outlet of the conversion tube is connected to a mixed gas heater and a raw gas preheater in sequence through a pipeline, and finally the hydrogen-rich conversion gas is discharged through the pipeline; The gas outlet is connected to a steam generator, and the steam generator is provided with a water vapor output end and a smoke output end, the water vapor output end is connected to a steam drum through a pipeline, and the smoke output end discharges the smoke through the pipeline; The preheated desalted water output source passes through a pipeline and a steam drum, wherein the steam drum is provided with a steam drum output end, and the steam drum output end is connected to the pipeline between the mixed gas heater and the raw gas preheater through a pipeline.

2. A biogas cracking hydrogen production coil reaction device according to claim 1, characterized in that: The reformer also includes a cover and a reformer body.

3. The biogas cracking hydrogen production coil reaction device according to claim 1, characterized in that: The middle section of the conversion coil is a spiral coil filled with catalyst.

4. A biogas cracking hydrogen production coil reaction device according to claim 2, characterized in that: The reforming furnace body is a circular furnace, and the reforming coil is fixed inside the reforming furnace body through a sealing cover.

5. A biogas cracking hydrogen production coil reaction device according to claim 4, characterized in that: There are multiple conversion coils, which are arranged on the cover in a circular array.

6. A biogas cracking hydrogen production coil reaction device according to claim 5, characterized in that: The conversion coil is made of high temperature resistant and corrosion resistant alloy steel or stainless steel.

7. A biogas cracking hydrogen production coil reaction device according to claim 6, characterized in that: A safety distance is left between the conversion coils.

8. The biogas cracking hydrogen production coil reaction device according to claim 7, characterized in that: A safety distance is left between the conversion coil and the outer wall of the conversion furnace.

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