Evaporator for producing hydrogen from methanol

Abstract

The evaporator comprises an evaporation box, a heater is arranged on the evaporation box, meanwhile, an exhaust pipe is further arranged on the evaporation box, a temporary storage box is arranged at the outlet end of the exhaust pipe, a steam pipe is arranged on the temporary storage box, and an adjusting valve is arranged on the steam pipe; the temporary storage box is further provided with a heat preservation module, the evaporator further comprises a controller, and the heater and the heat preservation module are electrically connected with the controller. Compared with the prior art, water vapor is collected through the temporary storage box and then output in a centralized mode, so that the stability of the water vapor output amount is guaranteed, and the production requirement is met; the steam output pressure can be effectively guaranteed, meanwhile, large fluctuation of the steam pressure is avoided, the stability of the steam output pressure is guaranteed, and stable operation of subsequent production procedures is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of methanol-to-hydrogen production equipment, and specifically relates to an evaporator for methanol-to-hydrogen production. Background Art

[0002] Methanol-to-hydrogen production is a commonly used technical route in China. In the methanol-to-hydrogen production process, the raw materials are methanol vapor and water vapor. In the prior art, water vapor is generally generated by a steam generator. However, during the operation of the steam generator, the amount of water vapor generated per unit time is limited, the pressure of the water vapor is relatively low, and the internal temperature of the steam generator fluctuates. As a result, the output volume and output pressure of the water vapor fluctuate due to the evaporator, and the water vapor cannot be stably output, affecting the production of subsequent processes. Utility Model Content

[0003] The main purpose of this application is to provide an evaporator for methanol-to-hydrogen production, aiming to solve the defect of unstable output of water vapor in the prior art.

[0004] This application achieves the above object through the following technical solutions:

[0005] An evaporator for methanol-to-hydrogen production, including an evaporation tank;

[0006] A heater, the heater is arranged inside the evaporation tank; an exhaust pipe is also arranged on the evaporation tank;

[0007] A temporary storage tank, one end of the temporary storage tank is provided with a steam pipe, and the other end is connected to the exhaust pipe; a regulating valve is arranged on the steam pipe, a check valve is arranged on the exhaust pipe, and the check valve opens towards the temporary storage tank side;

[0008] A heat preservation module, the heat preservation module is arranged inside the temporary storage tank;

[0009] A controller, the heater and the heat preservation module are respectively electrically connected to the controller.

[0010] Optionally, a liquid level gauge is arranged inside the evaporation tank, a water supply pipe is also arranged on the evaporation tank, a solenoid valve is arranged on the water supply pipe, and the solenoid valve and the liquid level gauge are respectively electrically connected to the controller.

[0011] Optionally, a heat exchange module is also wound around the temporary storage tank, the evaporator further includes a preheating tank, and a water transfer pump connected to the water supply pipe is arranged inside the preheating tank; the heat exchange module is connected to the preheating tank.

[0012] Optionally, the heat exchange module includes a circulation pump and heat exchange pipes, the outlet end of the heat exchange pipes is communicated with the preheating tank, and the inlet end is connected to the preheating tank through the circulation pump; the heat exchange pipes are wound around the temporary storage tank.

[0013] Optionally, the outer surface of the temporary storage box is wrapped with a heat-insulating layer made of heat-insulating cotton.

[0014] Optionally, a safety tube is provided on the temporary storage box, and a pressure relief component is provided on the safety tube.

[0015] Optionally, the pressure relief component includes a connecting sleeve, and a pressure rupture disc is arranged on the connecting sleeve; a plurality of blasting grooves are arranged on the pressure rupture disc.

[0016] Optionally, a blasting hole is further arranged on the pressure rupture disc, and the blasting grooves are radially arranged around the blasting hole; the cross section of each blasting groove is in a V-shaped structure.

[0017] Optionally, the heat preservation module includes a heating pipe, the heating pipe is arranged in the temporary storage box, and the heating pipe is electrically connected to the controller.

[0018] Optionally, the controller includes a touch screen and a PLC, and the touch screen is electrically connected to the PLC.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The present application includes an evaporation box, a heater is arranged on the evaporation box, and an exhaust pipe is further arranged on the evaporation box. The outlet end of the exhaust pipe is provided with a temporary storage box, a steam pipe is arranged on the temporary storage box, and a regulating valve is arranged on the steam pipe; a heat preservation module is further arranged on the temporary storage box, and the evaporator further includes a controller, and the heater and the heat preservation module are respectively electrically connected to the controller;

[0021] During use, the water in the evaporation box is heated by the heater to generate water vapor. The generated water vapor enters the temporary storage box through the exhaust pipe. When the water vapor needs to be used, the regulating valve located on the steam pipe is opened, and the high-pressure water vapor is output through the steam pipe; at the same time, the heat preservation module is used to heat the temporary storage box to ensure that its temperature is higher than 100 °C to prevent the water vapor from condensing again;

[0022] Since the steam output speed of the evaporation box is limited, the temporary storage box can collect the water vapor and then output it centrally, so as to ensure the stability of the water vapor output volume and meet the production requirements;

[0023] Secondly, since the present application collects and then outputs the water vapor, it can effectively ensure the output pressure of the water vapor, avoid large fluctuations in the water vapor pressure, ensure the stability of the water vapor output pressure, and is conducive to ensuring the stable operation of subsequent production processes;

[0024] Finally, a plurality of evaporation boxes can be connected in parallel to one temporary storage box, so as to ensure the generation amount of water vapor, and the redundancy of the whole system is higher, ensuring the stable operation of the equipment.

[0025] Meanwhile, the present application can also control the output of steam through a regulating valve, so as to ensure that the output of steam matches the required amount, and achieve precise control of the output of materials. Description of the Drawings

[0026] Figure 1 FIG. 1 is a schematic structural view of an evaporator for methanol hydrogen production provided in Embodiment 1 of the present application;

[0027] Figure 2 FIG. 2 is a schematic structural view of an evaporation tank;

[0028] Figure 3 FIG. 3 is a schematic structural view of a temporary storage tank;

[0029] Figure 4 FIG. 4 is a schematic structural view of a pressure rupture disk.

[0030] Reference numerals: 1 - evaporation tank, 2 - heater, 3 - exhaust pipe, 4 - temporary storage tank, 5 - steam pipe, 6 - regulating valve, 7 - check valve, 8 - liquid level gauge, 9 - make-up water pipe, 10 - solenoid valve, 11 - preheating tank, 12 - water transfer pump, 13 - circulation pump, 14 - heat exchange tube, 15 - heat insulation layer, 16 - safety pipe, 17 - connecting sleeve, 18 - pressure rupture disk, 19 - bursting groove, 20 - bursting hole, 21 - heating pipe, 22 - touch screen, 23 - PLC.

[0031] The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0034] In the present invention, unless otherwise clearly specified or defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] Embodiment 1

[0037] Referring to Figures 1 to 3 , as an optional embodiment of the present application, this embodiment discloses an evaporator for methanol-to-hydrogen production, including an evaporation tank 1, a heater 2 is arranged inside the evaporation tank 1, and the heater 2 is preferably a point heating tube 21 or other high-power heating components;

[0038] A water supply pipe 9 and an exhaust pipe 3 are arranged on the evaporation tank 1, and the water supply pipe 9 is used to convey production water into the evaporation tank 1;

[0039] At the same time, a one-way valve 7 is also arranged on the exhaust pipe 3, and the one-way valve 7 opens towards the side of the temporary storage tank 4;

[0040] A liquid level gauge 8 is also arranged inside the evaporation tank 1, a solenoid valve 10 is arranged on the water supply pipe 9, and the solenoid valve 10 and the liquid level gauge 8 are respectively electrically connected to the controller;

[0041] Under normal working conditions, the solenoid valve 10 on the water supply pipe 9 is in a closed state. When the liquid level gauge 8 detects that the water level in the evaporation tank 1 is low, the solenoid valve 10 is opened, and thus water is replenished through the water supply pipe 9;

[0042] Meanwhile, the on-off state of the exhaust pipe 3 is controlled by a one-way valve 7 to isolate the evaporation tank 1 and the temporary storage tank 4, preventing the pressure in the temporary storage tank 4 from dropping due to long-term connection with the evaporation tank 1;

[0043] It should be noted that a temperature sensor can also be provided in the evaporation tank 1 to accurately monitor the temperature inside the evaporation tank 1.

[0044] The evaporator further includes a temporary storage tank 4. The inlet end of the temporary storage tank 4 is connected to the exhaust pipe 3. Meanwhile, a steam pipe 5 is provided on the temporary storage tank 4, and a regulating valve 6 is provided on the steam pipe 5;

[0045] The evaporator further includes a preheating tank 11. A heat exchange module is provided on the temporary storage tank 4. The heat exchange module includes a circulation pump 13 and heat exchange pipes 14. The heat exchange pipes 14 are wound around the temporary storage tank 4. The inlet end of the heat exchange pipes 14 is connected to the preheating tank 11 through the circulation pump 13, and the outlet end of the heat exchange pipes 14 is directly connected to the preheating tank 11;

[0046] A water transfer pump 12 is provided in the preheating tank 11, and the water transfer pump 12 is connected to a make-up water pipe 9;

[0047] The outer surface of the temporary storage tank 4 is also wrapped with a heat insulation layer 15. The heat insulation layer 15 is made of heat insulation cotton or other heat insulation materials, and the heat insulation layer 15 also wraps the circulation pipe to reduce heat dissipation.

[0048] The water vapor stored in the temporary storage tank 4 continuously releases heat. At this time, the water in the preheating tank 11 is led out through the heat exchange pipes 14 and absorbs the heat released by the water vapor during the process of flowing around the temporary storage tank 4, thereby realizing the recycling of part of the heat;

[0049] On the one hand, it can effectively improve the utilization rate of heat; on the other hand, through the above technical measures, the temperature difference between the raw water and the evaporation tank 1 can be reduced. While avoiding drastic temperature changes in the evaporation tank 1, the heating efficiency is improved, ensuring the stable production of water vapor.

[0050] A heat insulation module is also provided in the temporary storage tank 4. The heat insulation module is a heating pipe 21, and the heating pipe 21 is provided in the temporary storage tank 4;

[0051] Meanwhile, a safety pipe 16 is provided on the top surface of the temporary storage tank 4. A pressure relief component is provided on the safety pipe 16. The pressure relief component includes a connecting sleeve 17. One end of the connecting sleeve 17 is open and is connected to the safety pipe 16 through a connecting thread; the other end is provided with a pressure rupture disk 18, and the pressure rupture disk 18 completely closes one end of the connecting sleeve 17;

[0052] The pressure rupture disk 18 is a thin metal sheet with a thickness not greater than 0.5 mm. A number of blasting grooves 19 are provided on the pressure rupture disk 18, and the cross-section of each blasting groove 19 is a V-shaped structure;

[0053] When the input amount of water vapor is too large while the discharge amount is small or not discharged, the pressure in the temporary storage tank 4 will gradually increase. When it exceeds a certain critical value, the pressure rupture disk 18 will rupture at the blasting groove 19 due to excessive external force, thereby realizing continuous pressure relief of the temporary storage tank 4 and ensuring the safe operation of the equipment;

[0054] Furthermore, a regulating valve 6 is also provided on the safety pipe 16. The regulating valve 6 can be manually or electrically controlled; at the same time, considering the pressure holding requirement of the temporary storage tank 4, the diameter of the safety pipe 16 cannot be too large;

[0055] Through the above settings, on the one hand, it can avoid a large amount of water vapor leakage, thereby affecting the stable operation of the equipment. On the other hand, after the pressure relief is completed, the safety pipe 16 is quickly closed through the regulating valve 6, which not only prevents continuous leakage of water vapor but also creates conditions for replacing the pressure relief component in the later stage.

[0056] At the same time, another safety pipe 16 can be provided on the temporary storage tank 4. A safety valve is provided on the safety pipe 16, and the pressure relief pressure of the safety valve is slightly smaller than that of the pressure relief component;

[0057] In the above technical solution, part of the smaller high pressure or slowly rising high pressure can be timely relieved through the safety valve, and at the same time, the safety valve can automatically close the safety pipe 16 itself; when the pressure increases sharply or the pressure relief speed of the safety valve is not enough to control the pressure of the temporary storage tank 4, continuous and rapid pressure relief is realized through the pressure relief component, which not only ensures the stable operation of the equipment but also has a higher redundancy of the equipment, and there is no need to frequently replace the pressure relief component.

[0058] Furthermore, blasting holes 20 are also provided on the pressure rupture disk 18, and each blasting groove 19 is arranged radially around the blasting hole 20;

[0059] The above structure can not only realize constant-pressure rupture more sensitively, but also has a larger rupture opening and a more regular shape, which is beneficial to realizing rapid pressure relief.

[0060] The evaporator further includes a controller, and the controller includes a touch screen 22 and a PLC 23. The touch screen 22 is electrically connected to the PLC 23; the solenoid valve 10, the regulating valve 6, the liquid level gauge 8, the circulation pump 13, etc. are all electrically connected to the PLC 23 respectively.

[0061] During use, the water in the evaporation tank is heated by a heater to produce water vapor. The generated water vapor enters the temporary storage tank through the exhaust pipe. When the water vapor needs to be used, the regulating valve located on the steam pipe is opened, and the high-pressure water vapor is output through the steam pipe. At the same time, the heat preservation module is used to heat the temporary storage tank to ensure that its temperature is higher than 100°C to prevent the water vapor from condensing again.

[0062] Since the steam output speed of the evaporation tank is limited, the temporary storage tank can collect the water vapor and then output it centrally, thus ensuring the stability of the water vapor output and meeting the production requirements.

[0063] Secondly, since the present application collects and then outputs the water vapor, it can effectively ensure the output pressure of the water vapor, avoid large fluctuations in the water vapor pressure, ensure the stability of the water vapor output pressure, and is conducive to ensuring the stable operation of subsequent production processes.

[0064] Finally, a temporary storage tank can be connected in parallel with multiple evaporation tanks to ensure the generation amount of water vapor, and the redundancy of the whole system is higher, ensuring the stable operation of the equipment.

[0065] At the same time, the present application can also control the output amount of steam through the regulating valve, so as to ensure that the output amount of steam matches the required amount and achieve precise control of the material output amount.

[0066] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. An evaporator for hydrogen production from methanol, characterized in that, Including an evaporator (1); A heater (2) is arranged inside the evaporator (1); an exhaust pipe (3) is further arranged on the evaporator (1); A temporary storage tank (4), one end of the temporary storage tank (4) is provided with a steam pipe (5), and the other end is connected to the exhaust pipe (3); a regulating valve (6) is arranged on the steam pipe (5), a check valve (7) is arranged on the exhaust pipe (3), and the check valve (7) opens towards the temporary storage tank (4); A heat preservation module is arranged inside the temporary storage tank (4); A controller, the heater (2) and the heat preservation module are respectively electrically connected to the controller.

2. The evaporator for methanol hydrogen production according to claim 1, characterized in that, A liquid level gauge (8) is arranged inside the evaporator (1), a water replenishing pipe (9) is further arranged on the evaporator (1), a solenoid valve (10) is arranged on the water replenishing pipe (9), and the solenoid valve (10) and the liquid level gauge (8) are respectively electrically connected to the controller.

3. The evaporator for methanol hydrogen production according to claim 2, characterized in that, A heat exchange module is wound around the temporary storage tank (4), and the evaporator further includes a preheating tank (11), and a water delivery pump (12) connected to the water replenishing pipe (9) is arranged inside the preheating tank (11); the heat exchange module is connected to the preheating tank (11).

4. The evaporator for methanol hydrogen production according to claim 3, wherein, The heat exchange module includes a circulation pump (13) and a heat exchange pipe (14), the outlet end of the heat exchange pipe (14) communicates with the preheating tank (11), and its inlet end is connected to the preheating tank (11) through the circulation pump (13); the heat exchange pipe (14) is wound around the temporary storage tank (4).

5. The evaporator for methanol hydrogen production according to claim 3, wherein The outer surfaces of the temporary storage tank (4) and the preheating tank (11) are wrapped with a heat preservation layer (15) made of heat preservation cotton.

6. The evaporator for methanol hydrogen production according to claim 1, characterized in that, A safety pipe (16) is arranged on the temporary storage tank (4), and a pressure relief component is arranged on the safety pipe (16).

7. An evaporator for methanol hydrogen production according to claim 6, characterized in that, The pressure relief component includes a connecting sleeve (17), and a pressure breaking piece (18) is arranged on the connecting sleeve (17); a plurality of blasting grooves (19) are arranged on the pressure breaking piece (18).

8. An evaporator for methanol hydrogen production according to claim 7, characterized in that, A blasting hole (20) is further arranged on the pressure breaking piece (18), and the blasting grooves (19) are radially arranged around the blasting hole (20); the cross sections of the blasting grooves (19) are all in a V-shaped structure.

9. An evaporator for methanol hydrogen production according to claim 1, characterized in that, The heat preservation module includes a heating pipe (21), the heating pipe (21) is arranged inside the temporary storage tank (4), and the heating pipe (21) is electrically connected to the controller.

10. The evaporator for hydrogen production from methanol according to claim 1, characterized in that, The controller includes a touch screen (22) and a PLC (23), and the touch screen (22) is electrically connected to the PLC (23).

Images