A shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization

Abstract

The present invention provides a shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization, belonging to the field of hydrocarbon fuel reforming hydrogen production devices. It solves the problems of low waste heat utilization rate and low hydrogen production efficiency in the existing reforming hydrogen production devices that utilize the waste heat of tail gas. It includes a reforming chamber, a plurality of rectangular spiral outer tail gas flow channels units and a plurality of rectangular spiral gasification flow channels units. A cylindrical inner tail gas flow channel is arranged inside the reforming chamber. The plurality of rectangular spiral outer tail gas flow channels units and the plurality of rectangular spiral gasification flow channels units are alternately wound around the outside of the reforming chamber in the form of rectangular spiral flow channels. The reforming chamber includes a plurality of reforming flow channels units, and the plurality of reforming flow channels units are arranged in a circumferential arrangement. The plurality of rectangular spiral gasification flow channels units correspond to the plurality of reforming flow channels units one by one. It is mainly used for the reforming hydrogen production of hydrocarbon fuels.

Description

Technical Field

[0001] The present invention belongs to the field of hydrocarbon fuel reforming hydrogen production devices, and particularly relates to a shunt sandwich multi-unit reforming hydrogen production reaction device with efficient waste heat utilization. Background Art

[0002] Energy is the basis for human survival and the guarantee for economic and social development. However, energy resources in the world are becoming increasingly tense today, facing serious environmental pollution and energy depletion problems. The energy utilization rate of many existing mechanical devices is limited, and the insufficient utilization of fossil energy will cause waste of resources. In addition, the use of fossil fuels will also generate a large amount of greenhouse gases and harmful substances, which will cause serious pollution and damage to the environment. Therefore, the high-temperature tail gas generated during the use of fossil fuels can be collected and utilized to improve the energy utilization rate.

[0003] Today, with serious environmental pollution, it is imperative to vigorously develop and promote the utilization of new energy. Hydrogen energy is a new energy that is currently being studied intensively. It has a high combustion calorific value, no pollution in combustion products, and is easy and diverse to obtain. It is an ideal clean energy with broad application prospects. Its characteristics of high efficiency, safety, and no pollution will become the pillar of new energy in the near future.

[0004] Because hydrogen is in a gaseous state at room temperature and has problems such as being flammable and explosive, it is difficult to store and transport. Therefore, on-site hydrogen production using hydrocarbon fuels has become a common hydrogen production method for various devices. There are mainly three methods for hydrocarbon fuel reforming hydrogen production, namely steam reforming, partial oxidation reforming, and autothermal reforming. In the case of an external heat source, steam reforming has a large hydrogen production volume and high content, and mild conditions, and is the current mainstream choice.

[0005] Currently, the disclosed reforming hydrogen production devices for waste heat utilization of mechanical device tail gas still have certain deficiencies in waste heat utilization and hydrogen production efficiency, and the design can be further optimized. Summary of the Invention

[0006] In view of this, the present invention aims to provide a shunt sandwich multi-unit reforming hydrogen production reaction device with efficient waste heat utilization to solve the problems of low waste heat utilization rate and low hydrogen production efficiency in the existing reforming hydrogen production devices using tail gas waste heat.

[0007] To achieve the above object, the present invention adopts the following technical solutions: A shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization, which includes a reforming chamber, a plurality of rectangular spiral outer tail gas flow channels units and a plurality of rectangular spiral gasification flow channels units. A cylindrical inner tail gas flow channel is arranged inside the reforming chamber. The plurality of rectangular spiral outer tail gas flow channels units and the plurality of rectangular spiral gasification flow channels units are alternately wound around the outside of the reforming chamber in the form of rectangular spiral flow channels. The reforming chamber includes a plurality of reforming flow channels units, and the plurality of reforming flow channels units are arranged in a circumferential arrangement. The plurality of rectangular spiral gasification flow channels units correspond to the plurality of reforming flow channels units one by one, and one end of the rectangular spiral gasification flow channel unit is communicated with the reforming flow channel unit.

[0008] Furthermore, a tail gas inlet and a tail gas discharge channel are respectively arranged at both ends of the reforming chamber, and the tail gas inlet is communicated with the tail gas discharge channel through the cylindrical inner tail gas flow channel and a plurality of rectangular spiral outer tail gas flow channels units.

[0009] Furthermore, an inner and outer flow channel tail gas collection chamber is arranged between the tail gas discharge channel and the cylindrical inner tail gas flow channel and a plurality of rectangular spiral outer tail gas flow channels units.

[0010] Furthermore, a fuel buffer shunt cavity is arranged outside the plurality of rectangular spiral outer tail gas flow channels units and the plurality of rectangular spiral gasification flow channels units. A fuel inlet is arranged on one side of the fuel buffer shunt cavity close to the tail gas discharge channel, and one end of each of the plurality of rectangular spiral gasification flow channels units close to the tail gas inlet is communicated with the fuel buffer shunt cavity.

[0011] Furthermore, a reforming unit inlet is arranged at one end of the reforming flow channel unit. One end of each of the plurality of rectangular spiral gasification flow channels units close to the tail gas inlet is communicated with the fuel buffer shunt cavity through a gasification unit inlet channel, and the other end of each of the plurality of rectangular spiral gasification flow channels units is communicated with the reforming flow channel unit through a reforming unit inlet channel.

[0012] Furthermore, a gas product collection chamber is arranged at one end of the buffer shunt cavity, and a gas product outlet is arranged on the gas product collection chamber. A reforming unit outlet channel is arranged at one end of the reforming flow channel unit close to the tail gas inlet, and all the plurality of reforming flow channels units are communicated with the gas product collection chamber through the reforming unit outlet channel.

[0013] Furthermore, an inner and outer flow channel tail gas separator is arranged at one end of the reforming flow channel unit close to the tail gas inlet.

[0014] Furthermore, a plurality of inner tail gas flow channel fins are evenly distributed along the circumference on the inner wall of the cylindrical inner tail gas flow channel.

[0015] Furthermore, a longitudinally arranged first fin and a transversely arranged second fin are provided in the recombined flow channel unit, and the first fin and the second fin are arranged in a cross manner.

[0016] Furthermore, reforming unit walls are provided on both sides of the recombined flow channel unit, and adjacent recombined flow channel units are connected through the reforming unit walls.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The high-temperature tail gas flow channel of the present invention includes a rectangular spiral outer tail gas flow channel unit and a cylindrical inner tail gas flow channel. The high-temperature tail gas at the inlet is divided into two parts as needed by the inner and outer flow channel tail gas separator, and the waste heat of the high-temperature tail gas can be fully utilized.

[0019] 2. The rectangular spiral outer tail gas flow channel unit and the rectangular spiral gasification flow channel unit of the present invention are alternately wound around the outside of the recombined flow channel unit in the form of a rectangular spiral flow channel. The rectangular spiral gasification flow channel units are arranged on both sides of the rectangular spiral outer tail gas flow channel unit. The secondary flow disturbance of the spiral channel and the alternating arrangement of the tail gas and the gasification unit are used to strengthen heat transfer and improve efficiency.

[0020] 3. The fuel gasification unit of the present invention is a rectangular spiral channel, with rectangular spiral outer tail gas flow channels on both sides and a reforming cavity on the inner side. One gasification unit is connected to one reforming unit for multi-unit reforming to produce hydrogen. The compact heat exchange structure and multi-unit gasification reforming can utilize waste heat to improve the thermal efficiency.

[0021] 4. The first fin and the second fin are arranged in the recombined flow channel unit of the present invention, further dividing the inside of the reforming unit into four regions to strengthen heat transfer and accelerate the reaction rate. The rectangular spiral outer tail gas flow channel and the rectangular spiral gasification flow channel are arranged on the outside, and the cylindrical inner tail gas flow channel with multiple groups of heat-conducting fins is arranged on the inner side. Multiple groups of heat-conducting inner tail gas flow channel fins are arranged on the wall surface of the cylindrical inner tail gas flow channel. The annular inner and outer arrangement can reduce heat loss and enhance heat transfer performance.

[0022] 5. The inner and outer flow channel high-temperature tail gas separator designed by the present invention is in the shape of a triangular ring and is designed as a whole with the outlet wall surface of the reforming unit, which can divide the tail gas into two parts as needed and enter the rectangular spiral outer tail gas flow channel and the cylindrical inner tail gas flow channel respectively.

[0023] 6. The fuel buffer and diversion cavity of the present invention is located outside the entire reaction device, can store a small amount of fuel, and makes the flow rate of the gasification unit inlet channel uniform through the buffering effect of temporarily storing a certain amount of fuel. Description of the Drawings

[0024] The accompanying drawings that form a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of a shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization according to the present invention;

[0026] Figure 2 It is a schematic diagram of the cross-section cutting position of a shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization according to the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the cross-section (A-A) of a shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization according to the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the cross-section (B-B) of a shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization according to the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the cross-section (C-C) of a shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization according to the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the cross-section (D-D) of a shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization according to the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the cross-section (E-E) of a shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization according to the present invention;

[0032] Figure 8 It is a schematic diagram of the cross-section structure of the heavy rectification channel unit of a shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization according to the present invention.

[0033] 1 - Tail gas inlet, 2 - Inner and outer flow channel tail gas separator, 3 - Rectangular spiral outer tail gas flow channel, 4 - Cylindrical inner tail gas flow channel, 5 - Inner and outer flow channel tail gas collection cavity, 6 - Tail gas discharge channel, 7 - Fuel inlet, 8 - Fuel buffer shunt cavity, 9 - Gasification unit inlet channel, 10 - Rectangular spiral gasification flow channel unit, 11 - Reforming unit inlet channel, 12 - Heavy rectification channel unit, 13 - Heavy rectification channel built-in fins, 14 - Reforming unit outlet channel, 15 - Gas product collection cavity, 16 - Gas product outlet, 17 - Inner tail gas flow channel fins, 18 - Reforming unit wall surface, 19 - First fins, 20 - Second fins. Detailed implementation mode

[0034] The following will clearly and completely elaborate on the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0035] See Figure 1-8 To illustrate this embodiment, a shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization includes a reforming chamber, a plurality of rectangular spiral outer tail gas flow channel units 3, and a plurality of rectangular spiral gasification flow channel units 10. A cylindrical inner tail gas flow channel 4 is arranged inside the reforming chamber. The plurality of rectangular spiral outer tail gas flow channel units 3 and the plurality of rectangular spiral gasification flow channel units 10 are alternately coiled around the outside of the reforming chamber in the form of rectangular spiral flow channels. The reforming chamber includes a plurality of reforming flow channel units 12, and the plurality of reforming flow channel units 12 are arranged in a circumferential arrangement. The plurality of rectangular spiral gasification flow channel units 10 correspond to the plurality of reforming flow channel units 12 one by one. One end of the rectangular spiral gasification flow channel unit 10 is communicated with the reforming flow channel unit 12. The high-temperature tail gas passes through the rectangular spiral outer tail gas flow channel unit 3 and the rectangular spiral gasification flow channel unit 10 respectively. The fuel entering the rectangular spiral outer tail gas flow channel unit 3 exchanges heat with the high-temperature tail gas in the rectangular spiral outer tail gas flow channel unit 3, and the fuel is gasified. The gasified fuel enters the reforming flow channel unit 12 for reforming. The high-temperature tail gas in the cylindrical inner tail gas flow channel 4 provides the heat required for the reforming of the gasified fuel entering the reforming flow channel unit 12.

[0036] In this embodiment, a tail gas inlet 1 and a tail gas discharge channel 6 are respectively arranged at both ends of the reforming chamber. The tail gas inlet 1 is communicated with the tail gas discharge channel 6 through the cylindrical inner tail gas flow channel 4 and a plurality of rectangular spiral outer tail gas flow channel units 3. The high-temperature tail gas enters the cylindrical inner tail gas flow channel 4 and the rectangular spiral outer tail gas flow channel unit 3 from the tail gas inlet 1 for heat exchange, and the heat-exchanged high-temperature tail gas is discharged from the tail gas discharge channel 6.

[0037] In this embodiment, an inner and outer flow channel tail gas collection chamber 5 is arranged between the tail gas discharge channel 6 and the cylindrical inner tail gas flow channel 4 and a plurality of rectangular spiral outer tail gas flow channel units 3. The gas products that have completed reforming are collected and discharged through the inner and outer flow channel tail gas collection chamber 5.

[0038] In this embodiment, a fuel buffer and distribution cavity 8 is provided outside the multiple rectangular spiral outer tail gas flow channels 3 and the multiple rectangular spiral gasification flow channels 10. A fuel inlet 7 is provided on one side of the fuel buffer and distribution cavity 8 close to the tail gas discharge channel 6. One end of each of the multiple rectangular spiral gasification flow channels 10 close to the tail gas inlet 1 is communicated with the fuel buffer and distribution cavity 8. One end of the heavy rectification channel unit 12 is provided with a reforming unit inlet channel 11. One end of each of the multiple rectangular spiral gasification flow channels 10 close to the tail gas inlet 1 is communicated with the fuel buffer and distribution cavity 8 through a gasification unit inlet channel 9, and the other end is communicated with the heavy rectification channel unit 12 through the reforming unit inlet channel 11. Fuel enters the fuel buffer and distribution cavity 8 from the fuel inlet 7. The fuel buffer and distribution cavity 8 is located outside the entire reaction device and can store a small amount of fuel. By the buffering effect of temporarily storing a certain amount of fuel, the flow rate of the gasification unit inlet channel 9 is made uniform. The fuel flows into the rectangular spiral gasification flow channel 10 from the fuel buffer and distribution cavity 8 through the gasification unit inlet channel 9 and then exchanges heat with the rectangular spiral outer tail gas flow channel 3 to gasify the fuel. The gasified fuel enters the heavy rectification channel unit 12 from the reforming unit inlet channel 11.

[0039] In this embodiment, a gas product collection cavity 15 is provided at one end of the fuel buffer and distribution cavity 8. A gas product outlet 16 is provided on the gas product collection cavity 15. One end of the heavy rectification channel unit 12 close to the tail gas inlet 1 is provided with a reforming unit outlet channel 14. All the multiple heavy rectification channel units 12 are communicated with the gas product collection cavity 15 through the reforming unit outlet channel 14. The gas products completed in the heavy rectification channel unit 12 enter the gas product collection cavity 15 through the reforming unit outlet channel 14 for collection and are discharged from the gas product outlet 16.

[0040] In this embodiment, an inner and outer flow channel tail gas separator 2 is provided at one end of the heavy rectification channel unit 12 close to the tail gas inlet 1. The inner and outer flow channel high-temperature tail gas separator 2 is in the shape of a triangular circular ring and is designed integrally with the wall surface of the reforming unit outlet channel 14 of the heavy rectification channel unit 12, and can divide the tail gas into two parts as required and enter the rectangular spiral outer tail gas flow channel 3 and the cylindrical inner tail gas flow channel 4 respectively.

[0041] In this embodiment, a plurality of inner tail gas flow channel fins 17 are evenly distributed along the circumference on the inner wall of the cylindrical inner tail gas flow channel 4. The function of the inner tail gas flow channel fins 17 is to conduct heat and enhance the heat transfer performance of the cylindrical inner tail gas flow channel 4.

[0042] In this embodiment, the heavy rectification channel unit 12 is provided with longitudinally arranged first fins 19 and transversely arranged second fins 20. The first fins 19 and the second fins 20 are arranged in a crosswise manner. The first fins 19 and the second fins 20 are arranged in the heavy rectification channel unit 12, and the interior of the heavy rectification channel unit 12 is further divided into four regions by the first fins 19 and the second fins 20, strengthening heat transfer and accelerating the reaction rate.

[0043] In this embodiment, the two sides of the heavy rectification channel unit 12 are provided with a reforming unit wall surface 18, and the adjacent two heavy rectification channel units 12 are connected through the reforming unit wall surface 18.

[0044] The working principle of this embodiment is as follows:

[0045] After the high-temperature tail gas enters through the tail gas inlet 1, it is divided into two parts by the inner and outer flow path tail gas separator 2. One part enters the rectangular spiral outer tail gas flow path 3 to exchange heat with the fuel in the rectangular spiral gasification flow path unit 10, and the other part enters the cylindrical inner tail gas flow path 4 to provide heat for the heavy rectification channel unit 12. The hydrocarbon fuel is introduced into the fuel buffer and shunt cavity 8 from the fuel inlet 7. After being buffered by the fuel buffer and shunt cavity 8, the fuel uniformly enters the rectangular spiral gasification flow path unit 10 through the gasification unit inlet channel 9. The rectangular spiral outer tail gas flow path 3 and the rectangular spiral gasification flow path unit 10 are alternately wound around the outside of the heavy rectification channel unit 12 in the form of a rectangular spiral flow path. The two sides of the rectangular spiral outer tail gas flow path 3 are the rectangular spiral fuel gasification units 10, and heat transfer is carried out through the spiral wall surface to gasify the fuel in the rectangular spiral gasification flow path unit 10. The gasified fuel enters the heavy rectification channel unit 12 from the reforming unit inlet channel 11 for reforming. The high-temperature tail gas in the cylindrical inner tail gas flow path 4 provides the heat required for the reforming of the gasified fuel entering the heavy rectification channel unit 12. The gas products after the completion of reforming are collected through the gas product collection cavity 15 and discharged from the gas product outlet 16.

[0046] In this embodiment, the high-temperature tail gas flow path includes two channels, namely the rectangular spiral outer tail gas flow path unit 3 and the cylindrical inner tail gas flow path 4. The imported high-temperature tail gas is divided into two parts as needed by the inner and outer flow path tail gas separator 2, and the waste heat of the high-temperature tail gas can be fully utilized.

[0047] In this embodiment, the rectangular spiral outer tail gas flow path unit 3 and the rectangular spiral gasification flow path unit 10 are alternately wound around the outside of the heavy rectification channel unit 12 in the form of a rectangular spiral flow path. The two sides of the rectangular spiral outer tail gas flow path unit 3 are the rectangular spiral gasification flow path units 10. The secondary flow disturbance of the spiral channel and the form of alternating arrangement of the tail gas and the gasification unit are used to strengthen heat transfer and improve efficiency.

[0048] In this embodiment, the rectangular spiral gasification flow channel unit 10 is a rectangular spiral channel. The two sides are rectangular spiral outer tail gas flow channel units 3, and the inner side is a reforming cavity. One rectangular spiral gasification flow channel unit 10 is connected to one reforming flow channel unit 12 for multi-unit reforming hydrogen production. The compact heat exchange structure and multi-unit gasification reforming can utilize waste heat to improve the thermal efficiency.

[0049] The embodiments of the present invention disclosed above are only used to help explain the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can understand and utilize the present invention well.

Claims

1. A shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization, Characterized in that: It includes a reforming chamber, a plurality of rectangular spiral outer tail gas flow channels unit (3) and a plurality of rectangular spiral gasification flow channels unit (10). A cylindrical inner tail gas flow channel (4) is arranged inside the reforming chamber. The plurality of rectangular spiral outer tail gas flow channels unit (3) and the plurality of rectangular spiral gasification flow channels unit (10) are alternately wound around the outside of the reforming chamber in the form of rectangular spiral channels. The reforming chamber includes a plurality of reforming flow channels unit (12). The plurality of reforming flow channels unit (12) are arranged in a circumferential arrangement. The plurality of rectangular spiral gasification flow channels unit (10) correspond to the plurality of reforming flow channels unit (12) one by one. One end of the rectangular spiral gasification flow channels unit (10) is communicated with the reforming flow channels unit (12). Tail gas inlets (1) and tail gas discharge channels (6) are respectively arranged at both ends of the reforming chamber. The tail gas inlet (1) is communicated with the tail gas discharge channel (6) through the cylindrical inner tail gas flow channel (4) and a plurality of rectangular spiral outer tail gas flow channels unit (3). A fuel buffer shunt cavity (8) is arranged outside the plurality of rectangular spiral outer tail gas flow channels unit (3) and the plurality of rectangular spiral gasification flow channels unit (10). A fuel inlet (7) is arranged on one side of the fuel buffer shunt cavity (8) close to the tail gas discharge channel (6). One end of the plurality of rectangular spiral gasification flow channels unit (10) close to the tail gas inlet (1) is communicated with the fuel buffer shunt cavity (8).

2. The shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization according to claim 1, Characterized in that: An inner and outer flow channel tail gas collection cavity (5) is arranged between the tail gas discharge channel (6) and the cylindrical inner tail gas flow channel (4) and the plurality of rectangular spiral outer tail gas flow channels unit (3).

3. The shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization according to claim 1, Characterized in that: One end of the reforming flow channels unit (12) is provided with a reforming unit inlet channel (11). One end of the plurality of rectangular spiral gasification flow channels unit (10) close to the tail gas inlet (1) is communicated with the fuel buffer shunt cavity (8) through the gasification unit inlet channel (9), and the other ends are communicated with the reforming flow channels unit (12) through the reforming unit inlet channel (11).

4. The shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization according to claim 3, Characterized in that: One end of the fuel buffer shunt cavity (8) is provided with a gas product collection cavity (15). A gas product outlet (16) is arranged on the gas product collection cavity (15). One end of the reforming flow channels unit (12) close to the tail gas inlet (1) is provided with a reforming unit outlet channel (14). The plurality of reforming flow channels unit (12) are all communicated with the gas product collection cavity (15) through the reforming unit outlet channel (14).

5. The shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization according to claim 3, Characterized in that: One end of the heavy rectification channel unit (12) close to the tail gas inlet (1) is provided with an internal and external flow channel tail gas separator (2).

6. A shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization according to claim 1, characterized in that: A plurality of internal tail gas flow channel fins (17) are evenly distributed along the circumference on the inner wall of the cylindrical internal tail gas flow channel (4).

7. A shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization according to claim 1, characterized in that: A first fin (19) arranged longitudinally and a second fin (20) arranged transversely are arranged in the heavy rectification channel unit (12), and the first fin (19) and the second fin (20) are arranged in a cross manner.

8. A shunt sandwich multi-unit reforming hydrogen production reaction device for efficient waste heat utilization according to claim 1, characterized in that: Reforming unit walls (18) are provided on both sides of the heavy rectification channel unit (12), and adjacent two heavy rectification channel units (12) are connected through the reforming unit walls (18).

Images