Skid-mounted methanol hydrogen production device

Abstract

The utility model discloses a skid-mounted methanol-to-hydrogen device and belongs to the technical field of hydrogen preparation. Comprising a heating unit and a reactor, raw materials sequentially pass through the heating unit and a converter, the heating unit and the converter are fixed to a skid-mounted structure, and the heating unit comprises a vaporizer and a superheater. The vaporizer, the superheater and the converter are located on the surface of the bottom plate and fixed to the main frame. According to the skid-mounted methanol-to-hydrogen device, the main frame is arranged in the skid-mounted structure, and the tank body structure with relatively heavy weight is fixed with the main frame, so that compared with the scheme that the tank bodies are uniformly arranged on the surface of the bottom plate in the methanol-to-hydrogen scheme in the prior art, the gravity of the tank body structure is shared by the main frame during movement; and meanwhile, the stress on each pipeline during moving is reduced, and the damage to the pipeline connection is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen preparation, and specifically relates to a skid-mounted methanol hydrogen production device. Background Art

[0002] In the prior art, when preparing industrial hydrogen, the method of producing hydrogen through methanol-water vapor reforming is a relatively mature and commonly used method. Its principle is roughly to gasify the raw materials consisting of methanol and water in a superheater at high temperature and then send them into a reactor, and carry out cracking conversion and shift reaction respectively under the action of the catalyst in the reactor.

[0003] Since the temperature of the hydrogen output in the reactor is relatively high, in order to realize the preheating and utilization of the hydrogen, the hydrogen is generally connected to the heat exchanger as a high-temperature medium to preheat the raw materials composed of methanol and water, and at the same time, the hydrogen is cooled for subsequent storage, such as the technical solution recorded in the Chinese invention patent with application number 202310722928.X, application date June 19, 2023, and patent name "A methanol reforming hydrogen production hydrogen-powered wind power operation and maintenance ship"; the technical solution recorded in the Chinese invention patent with application number 202410638619.9, application date May 22, 2024, and patent name "A low-carbon energy supply system and flexible control method with green methanol as a carrier"; the technical solution recorded in the Chinese invention patent with application number 202311216197.8, application date September 19, 2023, and patent name "Methanol cracking hydrogen production equipment startup control method, device, equipment and storage medium".

[0004] However, the common problems in the existing technologies including the above technical solutions are that the current methanol-water hydrogen production device occupies a large area, resulting in increased investment and a long construction period. In addition, the current methanol hydrogen production devices are all fixed, requiring on-site civil engineering, installation and construction, and cannot be moved after the device is built. To solve the above problems, the commonly used means in the prior art is to realize the entire hydrogen production device through a skid-mounted structure, such as the technical solution recorded in the Chinese invention patent with application number 202210472677.X, application date April 29, 2022, and patent name "A skid-mounted methanol hydrogen production device"; the technical solution recorded in the Chinese invention patent with application number 202211300050.2, application date October 24, 2022, and patent name "A skid-mounted methanol reforming hydrogen production and purification equipment and its hydrogen production and purification method"; the technical solution recorded in the Chinese invention patent with application number 202311210852.9, application date September 20, 2023, and patent name "A intensive methanol hydrogen production skid-mounted equipment". However, the above-mentioned skid-mounted hydrogen production system still has the following problems: in the above-mentioned technical solution, the various tanks of the hydrogen production device are arranged on the bottom plate surface of the skid-mounted structure, so the weight of the entire hydrogen production system is supported by the bottom plate. During movement, in addition to the bottom plate, each pipeline will also bear a part of the weight, which may cause certain damage to the pipeline connections of the system. Utility Model Content

[0005] The technical problem to be solved by the utility model is: to overcome the shortcomings of the prior art and provide a skid-mounted methanol hydrogen production device in which a main frame is arranged in a skid-mounted structure, a tank structure with a heavier weight is fixed to the main frame, and compared with the prior art methanol hydrogen production scheme in which the tanks are all arranged on the surface of the bottom plate, when moving, the main frame is used to share the gravity of the tank structure, while reducing the force on each pipeline during movement, thereby avoiding damage to the pipeline connection.

[0006] The technical solution adopted by the utility model to solve its technical problems is: it includes a heating unit and a reactor, the raw materials pass through the heating unit and the converter in sequence, the heating unit and the converter are fixed on the skid-mounted structure, the heating unit includes a vaporizer and a superheater, and is characterized in that: the skid-mounted structure includes a bottom plate and a main frame fixed on the surface of the bottom plate, the vaporizer, the superheater and the converter are located on the surface of the bottom plate and are fixed to the main frame.

[0007] Preferably, a condenser is erected on the side of the converter, the vaporizer and the superheater are connected via a vaporizer raw material output pipe, the superheater and the converter are connected via a superheater raw material output pipe, and the converter and the condenser are connected via a hydrogen output pipe.

[0008] Preferably, a heat exchanger is provided on the side of the condenser, and the methanol input pipe for inputting raw materials is connected to the raw material input port of the vaporizer through the low-temperature medium channel of the heat exchanger, the hydrogen output pipe is connected to the hydrogen input end of the condenser through the high-temperature medium channel of the heat exchanger, and the hydrogen output end of the condenser is connected to the hydrogen outlet through the output valve.

[0009] Preferably, a second circulation pump is fixed at the bottom of the main frame, and a heat transfer oil circulation is formed between the superheater and the converter through the second circulation pump; a first circulation pump is also arranged on the upper part of the second circulation pump, and a heat transfer oil circulation is formed in the vaporizer through the first circulation pump.

[0010] Preferably, the skid-mounted structure also includes a shell covering the outside of the main frame, with a lifting lug arranged on the top of the shell; a distribution box is arranged on one end face of the shell, and a methanol input pipe and a hydrogen outlet are arranged in sequence on the other end face of the shell; a cooling water inlet and a cooling water outlet are also arranged between the methanol input pipe and the hydrogen outlet, and the cooling water inlet and the cooling water outlet are respectively connected to the condenser.

[0011] Preferably, the shells of the vaporizer and the superheater are tightly fitted together.

[0012] Preferably, a metering pump is also provided between the heat exchanger and the methanol inlet pipe.

[0013] Preferably, a carburetor heater is provided at the bottom of the carburetor, and the carburetor heater is vertically arranged upward from the bottom of the carburetor in its shell; a superheater heater is provided at the bottom of the superheater, and the superheater heater is vertically arranged upward from the bottom of the superheater in its shell.

[0014] Preferably, a steam trap is connected to the bottom of the condenser through a pipeline.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] In the skid-mounted methanol hydrogen production device, the vaporizer, superheater, converter and condenser are directly fixed to the main frame as heavy tank structures. Compared with the methanol hydrogen production scheme in the prior art, in which the tanks are arranged on the surface of the bottom plate, when moving, the skid-mounted methanol hydrogen production device is hoisted through the outer shell and the bottom plate fixed to the bottom of the outer shell, and the main frame is used to share the gravity of the tank structure. At the same time, the force on each pipeline during movement is reduced, thereby avoiding damage to the pipeline connection.

[0017] In this skid-mounted methanol hydrogen production device, a heating unit formed by a combination of a vaporizer and a superheater is provided. On the premise of ensuring the gasification effect of the raw material, the temperature loss is reduced to the greatest extent and the utilization rate of the high temperature is improved.

[0018] The hydrogen output from the converter is connected to the heat exchanger to preheat the raw materials, thereby improving the utilization rate of the residual heat of the hydrogen.

[0019] An insulation layer is arranged outside the vaporizer and the superheater, and the vaporizer and the superheater are arranged inside the insulation layer at the same time, so as to further avoid temperature loss.

[0020] A heat transfer oil circulation is arranged between the superheater and the converter, and the high-temperature heat transfer oil in the superheater is used to provide the reaction temperature in the converter.

[0021] The skid-mounted methanol hydrogen production device adopts a skid-mounted structure, and a lifting lug is arranged on the top of the shell, which is conducive to the movement of the skid-mounted methanol hydrogen production device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the axonometric view of the skid-mounted methanol hydrogen production unit.

[0023] Figure 2 This is the front view of the skid-mounted methanol hydrogen production unit.

[0024] Figure 3 for Figure 2 Left view of .

[0025] Figure 4 for Figure 2 Right view of .

[0026] Figure 5 for Figure 1 View after omitting the housing.

[0027] Figure 6 for Figure 2 View after omitting the housing.

[0028] Figure 7 for Figure 6 Left view of .

[0029] Figure 8 for Figure 6 Rear view of.

[0030] Fig. 9 for Figure 6 Right view of .

[0031] Among them: 1. distribution box; 2. shell; 3. methanol input pipe; 4. steam trap; 5. cooling water inlet; 6. cooling water outlet; 7. hydrogen outlet; 8. condenser; 9. converter oil inlet pipe; 10. vaporizer oil inlet pipe; 11. first circulation pump; 12. pump bracket; 13. second circulation pump; 14. vaporizer oil outlet pipe; 15. main frame; 16. vaporizer heater; 17. vaporizer; 18. superheater heater; 19. superheater; 20. methanol preheating pipe; 21. converter; 22. bottom plate; 23. metering pump; 24. heat exchanger; 25. cooling water output pipe; 26. output valve; 27. converter oil outlet pipe; 28. vaporizer raw material output pipe; 29. ​​superheater raw material output pipe; 30. hydrogen output pipe; 31. superheater return oil pipe; 32. fixing frame. DETAILED DESCRIPTION

[0032] Figures 1 to 9 It is the best embodiment of the utility model, and the following Figures 1 to 9 The utility model is further described.

[0033] like Figures 1 to 3 As shown, the skid-mounted methanol hydrogen production device includes a shell 2, a hydrogen production system is fixed inside the shell 2, and a distribution box 1 is arranged on the end face of one end of the shell 2. A methanol input pipe 3, a steam trap 4, a cooling water inlet 5, a cooling water outlet 6 and a hydrogen outlet 7 are arranged in sequence at the lower part of the end face of the shell 2 opposite to the end face where the distribution box 1 is arranged. Methanol as a raw material is connected to the hydrogen production system inside the shell 2 from the methanol input pipe 3, and the hydrogen produced by the hydrogen production system is output from the hydrogen outlet 7 and sent to the subsequent pressure-stabilizing gas storage tank for storage. The steam trap 4, the cooling water inlet 5 and the cooling water outlet 6 are simultaneously led out of the self-made hydrogen system. Lifting rings are also arranged at the four corners of the top of the shell 2 to realize the movement of the skid-mounted methanol hydrogen production device.

[0034] Combination Figures 4 to 9 A bottom plate 22 is provided at the bottom of the housing 2, a main frame 15 is fixed on the surface of the bottom plate 22, and the housing 2 is covered and fixed on the outside of the main frame 15 and the bottom plate 22. The evaporator 17, the superheater 19, the converter 21 and the condenser 8 are erected in sequence on the surface of the bottom plate 22. The evaporator 17, the superheater 19, the converter 21 and the condenser 8 are all fixed by the main frame 15.

[0035] Fixing frames 32 are fixed to the outer circumferences of the vaporizer 17, the superheater 19, the converter 21 and the condenser 8, respectively, and the fixing frames 32 are fixed to the main frame 15 at the same time. The vaporizer 17, the superheater 19 and the converter 21 are located on the inner side of the main frame 15, and the condenser 8 is located on the outer side of the main frame 15. In the present skid-mounted methanol hydrogen production device, the vaporizer 17, the superheater 19, the converter 21 and the condenser 8 are fixed to the main frame 15 through their respective fixing frames 32 as tank structures with a large weight. Compared with the scheme of methanol hydrogen production in the prior art, in which the tanks are arranged on the surface of the bottom plate 22, the present skid-mounted methanol hydrogen production device is hoisted through the outer shell 2 and the bottom plate 22 fixed to the bottom of the outer shell 2 during movement, and the main frame 15 is used to share the gravity of the tank structure, while reducing the force on each pipeline during movement, thereby avoiding damage to the pipeline connection.

[0036] The vaporizer 17 and the superheater 19 are tightly attached and fixed as one body, and the vaporizer 17 and the superheater 19 constitute the heating unit of the skid-mounted methanol hydrogen production device. In the heating unit of the skid-mounted methanol hydrogen production device, the superheater 19 and the vaporizer 17 are designed as an integrated structure, which realizes the heat transfer between the superheater 19 and the vaporizer 17, and avoids the temperature loss to a certain extent. In order to further avoid the temperature loss, an insulation layer can also be set outside the vaporizer 17 and the superheater 19, and the vaporizer 17 and the superheater 19 are set therein at the same time through the insulation layer.

[0037] The vaporizer 17 includes a shell, in which a coil is arranged, and the coil is arranged along its height direction. Heat transfer oil is arranged in the shell of the vaporizer 17, and the coil is immersed in the heat transfer oil as a whole. A vaporizer heater 16 is arranged at the bottom of the vaporizer 17, and the vaporizer heater 16 is arranged vertically in the shell from the bottom of the vaporizer 17 shell upward, and the coil in the vaporizer 17 is located at the outer circle of the vaporizer heater 16. A vaporizer raw material input pipe is arranged at the lower part of the vaporizer 17 shell, and the vaporizer raw material input pipe is the inlet of the coil in the vaporizer 17. When the vaporizer heater 16 is working, the heating is realized by heating the heat transfer oil in the shell, and further the heating of the raw materials in the coil is realized.

[0038] The superheater 19 also includes a shell, in which a coil is arranged, and the coil is arranged along its height direction. Heat transfer oil is also provided in the shell of the superheater 19, and the coil is immersed in the heat transfer oil as a whole. A superheater heater 18 is provided at the bottom of the superheater 19. The superheater heater 18 is vertically arranged in the shell from the bottom of the superheater 19 shell upward, and the coil in the superheater 19 is located at the outer circle of the superheater heater 18.

[0039] A vaporizer raw material output pipe 28 is led out from the upper part of the vaporizer 17 shell, extends downward to the lower part of the superheater 19, and is connected to the superheater 19, and is connected to the coil inside the superheater 19 after entering the superheater 19. The outlet of the coil inside the superheater 19 extends to the upper part of the superheater 19, and a superheater raw material output pipe 29 is provided on the top of the superheater 19 shell. The superheater raw material output pipe 29 is connected to the subsequent converter 21, and the raw material is sent to the converter 21 for reaction. The converter 21 is implemented by a reactor known in the art, and its structure is not repeated here.

[0040] The condenser 8 is erected on one side of the converter 21, and a heat exchanger 24 is arranged on the upper front side of the condenser 8. The methanol input pipe 3 is first connected to the metering pump 23, and the methanol is metered by the metering pump 23 and sent to the low-temperature medium inlet of the heat exchanger 24. The low-temperature medium outlet of the heat exchanger 24 is connected to the methanol preheating pipe 20, and the other end of the methanol preheating pipe 20 extends to the vaporizer 17 and docks with the vaporizer raw material input pipe at the lower part of the shell of the vaporizer 17. A hydrogen output pipe 30 is arranged at the bottom of the converter 21, and the hydrogen obtained by the reaction in the converter 21 is output through the hydrogen output pipe 30. The hydrogen output pipe 30 is first connected to the high-temperature medium inlet of the heat exchanger 24, and the high-temperature medium outlet of the heat exchanger 24 is connected to the material inlet of the condenser 8. The material outlet of the condenser 8 is connected to the above-mentioned hydrogen outlet 7 through a pipeline, and an output valve 26 is installed in the connecting pipeline.

[0041] The high-temperature hydrogen generated by the reaction in the converter 21 is used to preheat the methanol input from the methanol input pipe 3 through the heat exchanger 24, and the first cooling of the hydrogen is achieved at the same time. Then the hydrogen enters the condenser 8 for secondary cooling, and the methanol raw material is preheated while the secondary utilization of the high-temperature hydrogen is achieved. A cooling water output pipe 25 is led out from the top of the condenser 8, and a cooling water input pipe is led out from the bottom of the condenser 8. The cooling water output pipe 25 and the cooling water input pipe are respectively connected to the above-mentioned cooling water outlet 6 and cooling water inlet 5, and are connected to an external water circulation device (not shown in the figure) through the cooling water outlet 6 and cooling water inlet 5 to achieve the circulation of cooling water. The above-mentioned steam trap 4 is connected to the bottom of the condenser 8 through a pipeline, and is used to discharge the condensed water inside the condenser 8.

[0042] A second circulating pump 13 is arranged at the rear of the vaporizer 17 and fixed on the surface of the bottom plate 22 . A pump bracket 12 is arranged above the second circulating pump 13 through a main frame 15 . A first circulating pump 11 is arranged on the surface of the pump bracket 12 and is located above the second circulating pump 13 .

[0043] A converter oil inlet pipe 9 is also provided at the upper part of the superheater 19 shell, and the converter oil inlet pipe 9 is connected to the shell of the converter 21, serving as an input pipe for the heat transfer oil of the converter 21. A heat transfer oil outlet is also provided at the bottom of the converter 21 shell, and a converter oil outlet pipe 27 is installed at the outlet. The other end of the converter oil outlet pipe 27 is connected to the inlet of the second circulating pump 13, and the outlet of the second circulating pump 13 is connected to a superheater oil return pipe 31. The other end of the superheater oil return pipe 31 is connected to the bottom of the superheater 19 shell. Through the second circulating pump 13, the circulation of heat transfer oil between the superheater 19 and the converter 21 is realized. The high-temperature heat transfer oil in the superheater 19 is used to provide the reaction temperature in the converter 21.

[0044] A vaporizer oil outlet pipe 14 is provided at the bottom of the vaporizer 17, the other end of the vaporizer oil outlet pipe 14 is connected to the inlet of the first circulating pump 11, and a vaporizer oil inlet pipe 10 is connected to the outlet of the first circulating pump 11, the other end of the vaporizer oil inlet pipe 10 is connected to the top of the shell of the vaporizer 17, and the circulation of the heat transfer oil in the vaporizer 17 is realized by the first circulating pump 11.

[0045] The specific working process and working principle are as follows:

[0046] The mixed raw material of methanol and water is sent to the low-temperature medium inlet of the heat exchanger 24 through the methanol input pipe 3, and is preheated in the heat exchanger 24. The low-temperature medium outlet of the heat exchanger 24 is connected to the raw material inlet of the vaporizer 17 through the methanol preheating pipe 20. The raw material is heated by the heat transfer oil in the vaporizer 17 and its temperature rises to 100° C. to achieve gasification of the raw material. When the vaporizer 17 is working, the first circulation pump 11 works to form a heat transfer oil circulation in the vaporizer 17.

[0047] The gasified raw material enters the superheater 19 again, and the superheater heater 18 works to heat the heat transfer oil in the superheater 19, so that the raw material is heated up again in the superheater 19 to 310°C. After the raw material is output from the superheater 19, it is sent to the converter 21 for reaction to generate hydrogen. In this process, the second circulation pump 13 works to form a heat transfer oil circulation between the superheater 19 and the converter 21, and the high-temperature heat transfer oil in the superheater 19 is used to provide the reaction temperature in the converter 21.

[0048] The hydrogen produced in the converter 21 is first connected to the high-temperature medium inlet of the heat exchanger 24, and its temperature is used to preheat the raw material and realize the first cooling of the hydrogen. After the first cooling in the heat exchanger 24, the hydrogen enters the condenser 8, and is cooled twice in the condenser 8. Finally, it is sent to the hydrogen outlet 7 through the pipeline at the bottom of the condenser 8, and is sent to the pressure-stabilizing gas storage tank for storage.

[0049] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A skid-mounted methanol hydrogen production device, comprising a heating unit and a reactor, wherein the raw material passes through the heating unit and the converter (21) in sequence, wherein the heating unit and the converter (21) are fixed on the skid-mounted structure, wherein the heating unit comprises a vaporizer (17) and a superheater (19), and wherein: The skid-mounted structure comprises a base plate (22) and a main frame (15) fixed on the surface of the base plate (22); the vaporizer (17), the superheater (19) and the converter (21) are located on the surface of the base plate (22) and fixed to the main frame (15).

2. The skid-mounted methanol hydrogen production device according to claim 1 is characterized in that: A condenser (8) is erected on the side of the converter (21); the vaporizer (17) and the superheater (19) are connected via a vaporizer raw material output pipe (28); the superheater (19) and the converter (21) are connected via a superheater raw material output pipe (29); and the converter (21) and the condenser (8) are connected via a hydrogen output pipe (30).

3. The skid-mounted methanol hydrogen production device according to claim 2 is characterized in that: A heat exchanger (24) is provided on the side of the condenser (8). A methanol input pipe (3) for inputting raw materials is connected to a raw material input port of the vaporizer (17) through a low-temperature medium channel of the heat exchanger (24). A hydrogen output pipe (30) is connected to a hydrogen input end of the condenser (8) through a high-temperature medium channel of the heat exchanger (24). The hydrogen output end of the condenser (8) is connected to a hydrogen outlet (7) through an output valve (26).

4. The skid-mounted methanol hydrogen production device according to claim 1 is characterized in that: A second circulation pump (13) is fixed at the bottom of the main frame (15), and a heat transfer oil circulation is formed between the superheater (19) and the converter (21) through the second circulation pump (13); a first circulation pump (11) is also arranged on the upper part of the second circulation pump (13), and a heat transfer oil circulation is formed in the vaporizer (17) through the first circulation pump (11).

5. The skid-mounted methanol hydrogen production device according to claim 3 is characterized in that: The skid-mounted structure also includes a housing (2) that is covered on the outside of the main frame (15), and a lifting lug is provided on the top of the housing (2); a distribution box (1) is provided on one end surface of the housing (2), and a methanol input pipe (3) and a hydrogen outlet (7) are arranged in sequence on the other end surface of the housing (2); a cooling water inlet (5) and a cooling water outlet (6) are also provided between the methanol input pipe (3) and the hydrogen outlet (7), and the cooling water inlet (5) and the cooling water outlet (6) are respectively connected to a condenser (8).

6. The skid-mounted methanol hydrogen production device according to claim 1 is characterized in that: The shells of the vaporizer (17) and the superheater (19) are tightly fitted together.

7. The skid-mounted methanol hydrogen production device according to claim 3 is characterized in that: A metering pump (23) is also provided between the heat exchanger (24) and the methanol inlet pipe (3).

8. The skid-mounted methanol-to-hydrogen device according to claim 1, characterized in that: A carburetor heater (16) is provided at the bottom of the carburetor (17), and the carburetor heater (16) is arranged vertically upward from the bottom of the carburetor (17) in its shell; a superheater heater (18) is provided at the bottom of the superheater (19), and the superheater heater (18) is arranged vertically upward from the bottom of the superheater (19) in its shell.

9. The skid-mounted methanol-to-hydrogen device according to claim 2, characterized in that: A steam trap (4) is also connected to the bottom of the condenser (8) via a pipeline.

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