Small-sized biogas hydrogen production reformer and use method thereof

Abstract

The invention belongs to the technical field of hydrogen production reforming furnaces, and particularly relates to a small biogas hydrogen production reforming furnace and a using method thereof.The small biogas hydrogen production reforming furnace comprises a reforming furnace body, a combustion cavity is formed in the inner side of the reforming furnace body, a gas inlet of the combustion cavity is communicated with a gas inlet, and a convection cavity is formed in the side, close to the combustion cavity, in the reforming furnace body; an air inlet of the convection cavity is communicated with an air outlet of the combustion cavity, and an air outlet of the convection cavity is communicated with a smoke exhaust port; a radiation section conversion tube nest is arranged in the combustion cavity, a convection section conversion tube nest is arranged in the convection cavity, and the radiation section conversion tube nest and the convection section conversion tube nest are communicated to form a reaction unit. And the construction and maintenance cost of the converter is reduced, and the safety performance is high. The tubular reformer is suitable for a biogas hydrogen production process which is high in conversion rate, stable in long-period operation and easy to operate and maintain.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydrogen production reformer, and particularly relates to a small-sized biogas hydrogen production reformer and a use method thereof. BACKGROUND

[0002] With the development of hydrogen energy industry, hydrogen energy will be applied in the transportation field on a large scale, but the hydrogen storage and transportation technology is difficult to have a major breakthrough, so the transportation link of hydrogen is reduced, and the hydrogen production and hydrogenation integration in the station is an effective way to solve the problems of high cost of hydrogen transportation and unguaranteed hydrogen source, and the adoption of small-sized box-type hydrogen production reformer is a development trend of the industry.

[0003] The chemical natural gas hydrogen production process is to first pretreat the natural gas, then convert the methane and water vapor into carbon monoxide and hydrogen in the reformer to obtain hydrogen-rich conversion gas, and obtain fuel cell hydrogen after purification, and the heat required for conversion is provided by combustion of fuel gas. 1. The traditional reformer adopts a single conversion tube, the conversion tube is long, the box-type device is large in size, is not conducive to miniaturization, and cannot be applied in the hydrogen production and hydrogenation integrated station and comprehensive energy station.

[0004] 2. The traditional reformer adopts a single conversion tube, and has the problem of non-uniform axial temperature, which may cause local overheating damage of the conversion tube and short service life.

[0005] 3. The traditional single-tube reformer has non-uniform heat transfer, low heat transfer efficiency, low heat utilization rate, and high energy consumption.

[0006] 4. The skid-mounted device is large in size, high in investment cost, large in occupied area, and difficult to transport.

[0007] Therefore, the traditional reformer has the problems of large size, wide occupied area, adoption of single-tube conversion tube, long conversion tube, and mainly large chemical station equipment, and cannot be applied in the hydrogen production and hydrogenation integrated station and comprehensive energy station. SUMMARY

[0008] The application aims to provide a small-sized biogas hydrogen production reformer and a use method thereof to solve the above problems.

[0009] To achieve the above-mentioned purpose, the application provides the following solutions. A small-sized biogas hydrogen production reformer, comprising a reformer, a combustion chamber is arranged in the inside of the reformer, a gas inlet is communicated with a gas inlet of the combustion chamber, a convection chamber is arranged on one side of the reformer close to the combustion chamber, a gas inlet of the convection chamber is communicated with a gas outlet of the combustion chamber, and a flue gas outlet is communicated with a gas outlet of the convection chamber. The combustion cavity is provided with a radiant section conversion tube, the feed inlet of the radiant section conversion tube is communicated with a raw material gas inlet, and one end of a connecting pipe communicated with the discharge outlet of the radiant section conversion tube. The convection cavity is provided with a convection section conversion tube, the feed inlet of the convection section conversion tube is communicated with one end of the connecting pipe away from the discharge outlet of the radiant section conversion tube, and the discharge outlet of the convection section conversion tube is communicated with a hydrogen-rich conversion gas outlet.

[0010] Preferably, the convection cavity is fixedly connected with at least two baffle plates arranged in parallel, a convection passage is formed between adjacent baffle plates, and the convection section conversion tube is arranged in the convection passage.

[0011] Preferably, the radiant section conversion tube comprises one radiant section conversion tube, the gas inlet of the radiant section conversion tube is communicated with the raw material gas inlet, and the gas outlet of the radiant section conversion tube is communicated with one end of the connecting pipe.

[0012] Preferably, the radiant section conversion tube comprises at least two radiant section conversion tubes, adjacent radiant section conversion tubes are connected end to end, the gas inlet of the radiant section conversion tube at the front end is communicated with the raw material gas inlet, and the gas outlet of the radiant section conversion tube at the rear end is communicated with one end of the connecting pipe.

[0013] Preferably, the convection section conversion tube comprises one convection section conversion tube, the gas inlet of the convection section conversion tube is communicated with one end of the connecting pipe, and the gas outlet of the convection section conversion tube is communicated with one end of the hydrogen-rich conversion gas outlet.

[0014] Preferably, the convection section conversion tube comprises at least two convection section conversion tubes, adjacent convection section conversion tubes are connected end to end, the gas inlet of the convection section conversion tube at the front end is communicated with one end of the connecting pipe, and the gas outlet of the convection section conversion tube at the rear end is communicated with one end of the hydrogen-rich conversion gas outlet.

[0015] A use method of a small-sized biological biogas hydrogen production conversion furnace, comprising: S1, filling catalysts into the radiant section conversion tube and the convection section conversion tube; S2, introducing fuel gas into the combustion cavity to produce heat by combustion, opening the raw material gas inlet to introduce raw material gas, and absorbing heat in the combustion cavity for reaction by the radiant section conversion tube; S3, discharging flue gas generated after combustion through the flue gas discharge outlet after the convection cavity, and absorbing heat in the convection cavity for reaction by the convection section conversion tube; S4, discharging the product after reaction through the hydrogen-rich conversion gas outlet.

[0016] Preferably, the catalyst is a Ni catalyst.

[0017] Compared with the prior art, the present application has the following advantages and technical effects: In the present application, part of the conversion tubes are installed in the combustion furnace, which ensures that the conversion tubes are uniformly heated in the radiation section and the convection section, the temperature difference between the upper and lower outer wall surfaces of the conversion tubes in each section is small, and the deformation of the conversion tubes caused by local overheating is reduced. The column tube type conversion furnace structure design reduces the height of the conversion tubes and the conversion furnace, reduces the volume of the hydrogen production conversion furnace, and can be applied in hydrogen production and integrated energy stations. Compared with a single conversion tube, the use of column tube form reduces the height, the flow path pressure drop is reduced, the service life of the conversion tube is increased, and the manufacturing cost is reduced. The operation flexibility is large, and the number of specific conversion tubes installed in the radiation section and the convection section is determined by the actual situation. This innovative column tube type conversion furnace design installs part of the conversion tubes in the combustion chamber, which not only makes the equipment structure more compact, but also reduces the construction and maintenance cost of the conversion furnace, and has high safety performance. The column tube type conversion furnace is suitable for the biogas hydrogen production process with high conversion rate, long period stable operation, easy operation and maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings: Figure 1 It is a schematic diagram of the production process of the present application; Figure 2 It is a schematic diagram of the structure of the present application; Figure 3 It is a top view of the device; Figure 4 It is a schematic diagram of the traditional natural gas hydrogen production process; Among them, 1, conversion furnace; 2, combustion chamber; 3, convection chamber; 4, gas inlet; 5, flue gas outlet; 6, raw gas inlet; 7, connecting pipe; 8, hydrogen-rich conversion gas outlet; 9, radiation section conversion column tube; 10, convection section conversion column tube; 11, baffle. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0021] With reference to Figures 1 to 2 The present application discloses a small-sized biological methane gas hydrogen conversion furnace, comprising: a conversion furnace 1, a combustion cavity 2 is arranged on the inner side of the conversion furnace 1, a gas inlet 4 is communicated with the gas inlet of the combustion cavity 2, a convection cavity 3 is arranged on the side of the conversion furnace 1 close to the combustion cavity 2, the gas inlet of the convection cavity 3 is communicated with the gas outlet of the combustion cavity 2, and a flue gas outlet 5 is communicated with the gas outlet of the convection cavity 3. A radiation section conversion pipe 9 is arranged in the combustion cavity 2, the raw material gas inlet 6 is communicated with the feed inlet of the radiation section conversion pipe 9, and one end of the connecting pipe 7 is communicated with the discharge outlet of the radiation section conversion pipe 9. A convection section conversion pipe 10 is arranged in the convection cavity 3, the connecting pipe 7 far away from the discharge outlet of the radiation section conversion pipe 9 is communicated with the feed inlet of the convection section conversion pipe 10, and the hydrogen-rich conversion gas outlet 8 is communicated with the discharge outlet of the convection section conversion pipe 10.

[0022] The present application sets the convection cavity 3 on the side of the combustion cavity 2, which can not only expand the range of heat contact and improve the heat receiving efficiency and utilization rate, but also reduce the height of the overall device and make it small-sized.

[0023] The radiation section conversion pipe 9 is arranged in the combustion cavity 2, the convection section conversion pipe 10 is arranged in the convection cavity 3, the two conversion pipes are communicated to form a reaction unit, the reasonable arrangement of the two structures not only ensures more uniform heat contact, improves the reaction efficiency and energy utilization rate, but also reduces the height of the conversion furnace 1 and the pipeline, and in terms of cost, the device can effectively utilize the heat generated by the flue gas combustion, which significantly improves the hydrogen conversion rate compared with the conversion furnace in the prior art.

[0024] Further optimization scheme, at least two baffle plates 11 are fixedly connected to the inner wall of the convection cavity 3 and arranged in parallel, the convection passage is formed between the adjacent baffle plates, and the convection section conversion pipe 10 is arranged in the convection passage.

[0025] The multiple baffle plates 11 arranged in the convection cavity 3 can form a flue gas convection passage, the heat generated by combustion forms a high-temperature area in the convection passage, and the reaction is catalyzed by effectively utilizing the waste heat of combustion.

[0026] The arrangement form of the multiple baffle plates 11 can be as shown in Figure 2 The number of the baffle plates 11 can be 4, which are arranged in an up-down staggered manner and can form the convection passage.

[0027] Further optimization scheme, the radiation section conversion column 9 includes a radiation section conversion tube, the radiation section conversion tube gas inlet communicates with the raw material gas inlet 6, the radiation section conversion tube gas outlet communicates with one end of the connecting pipe 7.

[0028] Further optimization scheme, the radiation section conversion column 9 includes at least two radiation section conversion tubes, adjacent radiation section conversion tubes are connected end to end, the gas inlet of the radiation section conversion tube at the front end communicates with the raw material gas inlet 6, and the gas outlet of the radiation section conversion tube at the rear end communicates with one end of the connecting pipe 7.

[0029] Further optimization scheme, the convection section conversion column 10 includes a convection section conversion tube, the convection section conversion tube gas inlet communicates with one end of the connecting pipe 7, and the convection section conversion tube gas outlet communicates with one end of the hydrogen-rich conversion gas outlet 8.

[0030] Further optimization scheme, the convection section conversion column 10 includes at least two convection section conversion tubes, adjacent convection section conversion tubes are connected end to end, the gas inlet of the convection section conversion tube at the front end communicates with one end of the connecting pipe 7, and the gas outlet of the convection section conversion tube at the rear end communicates with one end of the hydrogen-rich conversion gas outlet 8.

[0031] The device can be provided as: one radiation section conversion tube corresponds to one convection section conversion tube, multiple radiation section conversion tubes correspond to one convection section conversion tube, one radiation section conversion tube corresponds to multiple convection section conversion tubes, and multiple radiation section conversion tubes correspond to multiple convection section conversion tubes.

[0032] Regardless of the way, the actual needs are accurate, and the multiple radiation section conversion tubes and the multiple convection section conversion tubes can be set to shorten the length of the conversion tube while maintaining the catalytic / heat absorption efficiency similar to that of the existing conversion tube.

[0033] A method for using a small-scale biological methane gas hydrogen production conversion furnace, comprising: S1, fill catalyst into the radiation section conversion column 9 and the convection section conversion column 10; S2, pass fuel gas into the combustion chamber 2 through the fuel gas inlet 4 to produce heat by combustion, open the raw material gas inlet 6 to pass raw material gas, and the radiation section conversion column 9 absorbs heat in the combustion chamber 2 to react; S3, the flue gas generated after combustion passes through the convection chamber 3 and is discharged through the flue gas discharge outlet 5, and the convection section conversion column 10 absorbs heat in the convection chamber 3 to react; S4, the product after the reaction is discharged through the hydrogen-rich conversion gas outlet 8.

[0034] Further optimization scheme, the catalyst is a Ni catalyst.

[0035] Specifically, the device corresponds to the process flow: biological methane is desulfurized by a purifier, mixed with water vapor in proportion, and then enters a hydrogen production converter 1 to perform a conversion reaction to obtain hydrogen-rich conversion gas, and the heat required in the conversion process is provided by the combustion of the biological methane in the burner in the converter 1.

[0036] The hydrogen-rich conversion gas is purified by adsorption to obtain hydrogen-rich product gas, and the desorption gas is introduced into the combustion chamber 2 to produce heat by combustion, and the fuel is fully utilized.

[0037] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0038] The above-described embodiments are only descriptions of the preferred modes of the present application and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A small-scale biogas hydrogen production converter, characterized in that, include: A converter (1) is provided inside the converter (1), and a combustion chamber (2) is provided inside the converter (1). The inlet of the combustion chamber (2) is connected to a gas inlet (4). A convection chamber (3) is provided inside the converter (1) on the side close to the combustion chamber (2). The inlet of the convection chamber (3) is connected to the outlet of the combustion chamber (2). The outlet of the convection chamber (3) is connected to a flue gas outlet (5). The combustion chamber (2) is provided with a radiation section conversion tube (9), the feed port of the radiation section conversion tube (9) is connected to the raw material gas inlet (6), and the discharge port of the radiation section conversion tube (9) is connected to one end of the connecting pipe (7). The convection chamber (3) is provided with a convection section conversion tube (10). The inlet of the convection section conversion tube (10) is connected to a connecting pipe (7) at one end away from the outlet of the radiation section conversion tube (9). The outlet of the convection section conversion tube (10) is connected to a hydrogen-rich conversion gas outlet (8).

2. The small-scale biogas hydrogen conversion furnace according to claim 1, characterized in that: At least two parallel baffles (11) are fixedly connected to the inner wall of the convection cavity (3), and a convection path is formed between adjacent baffles. The convection section conversion tube (10) is located in the convection path.

3. A small-scale biogas hydrogen conversion furnace according to claim 1, characterized in that: The radiation section conversion tube (9) includes a radiation section conversion tube, the air inlet of which is connected to the raw material gas inlet (6), and the air outlet of which is connected to one end of the connecting pipe (7).

4. A small-scale biogas hydrogen conversion furnace according to claim 1, characterized in that: The radiation section conversion tube (9) includes at least two radiation section conversion tubes. The adjacent radiation section conversion tubes are connected end to end. The air inlet of the radiation section conversion tube at the front end is connected to the raw material gas inlet (6), and the air outlet of the radiation section conversion tube at the rear end is connected to one end of the connecting pipe (7).

5. A small-scale biogas hydrogen conversion furnace according to claim 1, characterized in that: The convection section conversion tube (10) includes a convection section conversion tube, the inlet of which is connected to one end of the connecting tube (7), and the outlet of which is connected to one end of the hydrogen-rich conversion gas outlet (8).

6. A small-scale biogas hydrogen conversion furnace according to claim 1, characterized in that: The convection section conversion tube (10) includes at least two convection section conversion tubes. The adjacent convection section conversion tubes are connected end to end. The inlet of the convection section conversion tube at the front end is connected to one end of the connecting pipe (7), and the outlet of the convection section conversion tube at the rear end is connected to one end of the hydrogen-rich conversion gas outlet (8).

7. A method of using a small-scale biogas hydrogen production converter according to claims 1-6, characterized in that, include: S1. The catalyst is filled into the radiation section conversion tube (9) and the convection section conversion tube (10); S2. Gas is introduced into the combustion chamber (2) through the gas inlet (4) to generate heat through combustion. The raw material gas inlet (6) is opened to introduce raw material gas. The radiation section conversion tube (9) absorbs the heat in the combustion chamber (2) and reacts. S3. The flue gas generated after combustion is discharged through the flue gas outlet (5) after passing through the convection chamber (3). The convection section conversion tube (10) absorbs the heat in the convection chamber (3) and reacts. S4. The product after the reaction is completed is discharged through the hydrogen-rich conversion gas outlet (8).

8. The method of using a small-scale biogas hydrogen production converter according to claim 7, characterized in that: The catalyst is a Ni catalyst.

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