Safety box body for producing hydrogen by autothermal reforming of methanol
By designing a safety box containing a combustion mechanism and an airflow interlayer, the problems of insufficient hydrogen sealing and incomplete hydrogen treatment in methanol reforming hydrogen production technology are solved, and the effect of efficient treatment of hydrogen-containing gas and improving system safety and environmental protection is achieved.
Patent Information
- Application Number
- CN202411803013.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-03-18
AI Technical Summary
The existing methanol reforming hydrogen production technology has shortcomings in hydrogen sealing, hydrogen-containing exhaust treatment and trace leakage of hydrogen, especially in closed spaces, which can easily lead to hydrogen accumulation, increasing safety hazards.
A safety box is designed, including a first space and a second space. The first space is used to place non-explosion-proof equipment. The second space is equipped with a combustion mechanism, an air flow interlayer, a fan, an intake pipe, an exhaust outlet pipe, an intake passage and an outlet passage, for centrally collecting and treating hydrogen-containing gas, and heat-treating residual hydrogen through the combustion mechanism.
By centrally collecting and treating hydrogen-containing gas, fully combustible substances in the exhaust gas, lowering the exhaust gas temperature, improving system efficiency, and enhancing the safety and environmental protection of the methanol self-heating reforming hydrogen production device, it is suitable for applications in closed or semi-enclosed spaces.
Smart Images
Figure CN119642208A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of methanol reforming hydrogen production, and in particular relates to a safety box used for methanol autothermal reforming hydrogen production. Background Art
[0002] As a carbon-free green new energy source, hydrogen has the characteristics of environmental protection and safety, high energy density, high conversion efficiency, abundant reserves and wide application range. The entire reaction process is pollution-free and zero-emission. It is an important carrier for responding to the increasingly severe environmental crisis and building a clean and low-carbon energy system.
[0003] At present, methanol reforming hydrogen production occupies an important position in the field of hydrogen production due to its advantages such as abundant raw materials, low cost and relatively mild reaction conditions. However, although the methanol reforming hydrogen production technology in the current market has basically achieved independence, there are still some obvious deficiencies in system design, especially in hydrogen sealing, hydrogen-containing tail gas treatment and hydrogen trace leakage, which still need further improvement. Especially in environments with limited ventilation conditions such as indoors, even if the leakage is small, hydrogen is easy to gather at the top of the closed space, greatly increasing the safety risks.
[0004] In view of this, the present invention is proposed. Summary of the invention
[0005] In order to solve the technical problems existing in the above-mentioned prior art, the present invention provides a safety box for producing hydrogen by methanol autothermal reforming.
[0006] To achieve the above object, the present invention adopts the following technical solutions:
[0007] A safety box for hydrogen production by methanol autothermal reforming comprises a box body, wherein a first space and a second space are provided in the box body, wherein the first space is provided with non-explosion-proof equipment; a combustion mechanism is provided in the second space, wherein the second space comprises an inner liner and an outer wall, an air flow interlayer is provided between the inner liner and the outer wall, a fan is provided between the air flow interlayer and the combustion mechanism, the fan is used to transport air in the air flow interlayer to the combustion mechanism, an air intake pipe is provided on one side of the combustion mechanism, and an exhaust gas outlet pipe is provided on the other side, an air intake channel is provided at the bottom of the second space, and an air outlet channel is provided between the top of the inner liner and the air flow interlayer.
[0008] The combustion mechanism includes a catalytic burner, a thermal burner, a biomass burner, an electric heating burner direct-fired heater or a horizontal heater.
[0009] A third space is provided on one side of the tail gas outlet pipe, a reforming reactor is provided in the third space, and an exhaust pipe is provided on one side of the third space, the exhaust pipe runs through the second space and communicates with the atmosphere.
[0010] A methanol storage tank and a purification device are respectively provided on both sides of the third space, and the methanol storage tank and the purification device are respectively communicated with the reforming reactor.
[0011] The exhaust gas outlet pipeline is provided with a temperature detector, and the temperature detector is connected to the fan signal.
[0012] The non-explosion-proof equipment includes an electrical cabinet and a chiller.
[0013] The bottom of the box body is provided with universal wheels.
[0014] The beneficial effects of the present invention are as follows:
[0015] (1) The present application utilizes the combustion mechanism provided in the methanol autothermal reforming hydrogen production device, and sets an air flow interlayer, a fan, an air inlet pipe, an exhaust gas outlet pipe, an air inlet channel and an air outlet channel to centrally collect and uniformly treat the hydrogen-containing gas discharged at each stage during the operation of methanol autothermal reforming hydrogen production, fully burn the combustible substances in the exhaust gas, and reduce environmental pollution; and the combustion mechanism is used to heat the reforming reactor, and the residual hydrogen in the process is completely treated by utilizing the waste heat, thereby reducing the exhaust gas temperature and increasing the system efficiency;
[0016] (2) By installing a temperature detector on the exhaust gas outlet pipe and connecting the temperature detector to the fan signal, when the exhaust gas temperature is detected to be too high, the system automatically increases the fan speed of the fan to increase the air intake of the combustion mechanism and improve the operating efficiency of the entire system;
[0017] (3) The use of the safety box disclosed in the present application helps to achieve the safe application of the methanol autothermal reforming hydrogen production device in a closed or semi-closed space, effectively solving the technical problems existing in the existing methanol reforming hydrogen production technology, such as insufficient hydrogen sealing, incomplete treatment of residual hydrogen in the process, and insufficient safety, thus laying a solid foundation for the application of this technology in a wider range of fields. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic structural diagram of a safety box for producing hydrogen through methanol autothermal reforming according to the present invention;
[0019] The numbers include: 1. electrical cabinet; 2. chiller; 3. catalytic burner; 4. catalyst; 5. air inlet channel; 6. air outlet channel; 7. fan; 8. temperature detector; 9. exhaust gas outlet pipe; 10. air inlet pipe; 11. methanol storage tank; 12. reforming reactor; 13. purification device; 14. discharge pipe; 15. air flow interlayer; 16. universal wheel; 17. first space; 18. second space; 19. third space. DETAILED DESCRIPTION
[0020] The present invention is further described below in conjunction with specific implementation methods.
[0021] In the following description, all concepts related to directionality (or orientation) such as up, down, left, right, front and back are referring to the position state of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be understood as special limitations on the technical solution provided by the present invention.
[0022] like Figure 1 As shown, a safety box for hydrogen production by autothermal reforming of methanol comprises a box body, wherein a first space 17 and a second space 18 are provided in the box body, wherein non-explosion-proof equipment is provided in the first space 17; a combustion mechanism is provided in the second space 18, wherein the second space 18 comprises an inner liner and an outer wall, an air flow interlayer 15 is provided between the inner liner and the outer wall, a fan 7 is provided between the air flow interlayer 15 and the combustion mechanism, and the fan 7 is used for conveying air in the air flow interlayer 15 to the combustion mechanism, an air intake pipe 10 is provided on one side of the combustion mechanism, and an exhaust gas outlet pipe 9 is provided on the other side, an air intake channel 5 is provided at the bottom of the second space 18, and an air outlet channel 6 is provided between the top of the inner liner and the air flow interlayer 15.
[0023] The combustion mechanism includes a catalytic burner 3, a thermal burner, a biomass burner, an electric heating burner direct-fired heater or a horizontal heater to adapt to different application scenarios and needs. A third space 19 is provided on one side of the tail gas outlet pipe 9, and a reforming reactor 12 is provided in the third space 19. An exhaust pipe 14 is provided on one side of the third space 19, and the exhaust pipe 14 runs through the second space 18 and communicates with the atmosphere. Methanol storage tanks 11 and purification devices 13 are provided on both sides of the third space 19, and the methanol storage tanks 11 and the purification devices 13 are communicated with the reforming reactor 12 respectively.
[0024] A temperature detector 8 is provided on the exhaust gas outlet pipe 9, and the temperature detector 8 is connected to the fan 7 signal. When the monitored temperature is higher than 600°C, the system will automatically increase the air volume of the fan 7 to prevent the catalytic combustion catalyst 4 from being deactivated due to high temperature. The non-explosion-proof equipment includes an electrical cabinet 1 and a chiller 2. Universal wheels 16 are provided at the bottom of the box body to facilitate the movement of the safety box.
[0025] Here’s how it works:
[0026] The safety box disclosed in the present application is a double-layer safety box, that is, a first space 17 and a second space 18 are provided in the box body, the two spaces are isolated from each other, and the first space 17 is used to place non-explosion-proof equipment such as an electrical cabinet 1 and a chiller 2.
[0027] The hydrogen-containing gases such as the exhaust gas at the initial stage of the startup, the tail gas generated during the hydrogen purification process, the hydrogen-containing gas discharged by the system overpressure, the tail hydrogen at the end of operation, and the hydrogen leaked in the event of an accident all flow into the combustion mechanism through the intake pipe 10. Among them, the catalytic burner 3 is used in the figure. Inside the catalytic burner 3, these gases undergo catalytic combustion reaction under the action of the catalyst 4. In order to ensure that the catalytic combustion reaches the required temperature, the catalytic burner 3 adopts an electric heating method.
[0028] The second space 18 includes an inner liner and an outer wall, and an air flow layer 15 is formed between the inner liner and the outer wall inside the box. The air flow layer 15 is a cavity, and there is no flammable or explosive equipment on the top to ensure safety. An air inlet channel 5 is reserved below the second space 18 of the box. After the external air enters the box through the air inlet channel 5, it flows out through the air outlet channel 6 reserved above the inner wall of the box and enters the air flow layer 15, and is finally sent into the catalytic burner 3 through the fan 7 to provide the required air for the catalytic combustion process.
[0029] A third space 19 is provided on one side of the tail gas outlet pipe 9, a reforming reactor 12 is provided in the third space 19, and an exhaust pipe 14 is provided on one side of the third space 19, and the exhaust pipe 14 runs through the second space 18 and communicates with the atmosphere, that is, the tail gas is used to heat the reforming reactor 12 after it flows out, so as to improve the energy utilization efficiency, and then the tail gas will be discharged to the external environment through the tail gas outlet pipe 9. Methanol storage tanks 11 and purification devices 13 are provided on both sides of the third space 19, and the methanol storage tanks 11 and the purification devices 13 are communicated with the reforming reactor 12 respectively.
[0030] At the same time, in order to monitor the temperature of the exhaust gas at the outlet of the catalytic burner 3, the present application sets a temperature detector 8 on the exhaust gas outlet pipe 9. When the monitored temperature is higher than 600°C, the system will automatically increase the air volume of the fan 7 to prevent the catalytic combustion catalyst 4 from being deactivated due to high temperature.
[0031] During the operation of the methanol autothermal reforming hydrogen production system, there are many links that may cause slight leakage of hydrogen, including but not limited to: ① exhaust in the initial stage of the startup phase; ② tail gas generated during the hydrogen purification process; ③ hydrogen-containing gas discharged by the system overpressure; ④ tail hydrogen at the end of operation; ⑤ hydrogen leakage in accident situations, etc. Therefore, this application reuses the combustion mechanism in the methanol reforming hydrogen production device, realizes the processing function of multiple gas sources, and centrally collects and uniformly processes the hydrogen-containing gas at each stage during the operation of the methanol reforming hydrogen production system. Specifically, the disclosed safety box applies existing modules such as catalytic combustion, active heating, and direct-fired heaters to the hydrogen-containing tail gas treatment process. After the tail gas enters the catalytic burner 3, it is fully burned under the catalytic action of the catalyst 4, and the combustible substances in the tail gas are fully burned to reduce environmental pollution; and the use of this box can completely process the residual hydrogen produced in the methanol reforming hydrogen production process, and improve the safety and environmental protection of the methanol reforming system.
[0032] The present application utilizes the combustion mechanism provided in the methanol autothermal reforming hydrogen production device, and sets an air flow interlayer 15, a fan 7, an air intake pipe 10, an exhaust gas outlet pipe 9, an air intake channel 5 and an air outlet channel 6, so as to centrally collect and uniformly treat the hydrogen-containing gas discharged at each stage during the operation of methanol autothermal reforming hydrogen production, fully burn the combustible substances in the exhaust gas, and reduce environmental pollution; and heat the reforming reactor 12 through the combustion mechanism, and completely treat the residual hydrogen in the process through the waste heat utilization, reduce the exhaust gas temperature, and increase the system efficiency; by A temperature detector 8 is provided, and the temperature detector 8 is connected to the signal of the fan 7. When it is detected that the exhaust temperature is too high, the system automatically increases the fan speed of the fan 7 to increase the air intake of the combustion mechanism, thereby improving the operating efficiency of the entire system. The use of the safety box disclosed in the present application is conducive to the safe application of the methanol autothermal reforming hydrogen production device in a closed or semi-closed space, and effectively solves the technical problems existing in the existing methanol reforming hydrogen production technology, such as insufficient hydrogen sealing, incomplete treatment of residual hydrogen in the process, and insufficient safety, laying a solid foundation for the application of this technology in a wider range of fields.
[0033] The above content is a further detailed description of the technical solution provided in combination with the preferred implementation methods of this patent. It cannot be determined that the specific implementation of the present invention is limited to the above descriptions. For ordinary technicians in the technical field to which this patent belongs, without departing from the concept of this patent, they can also make several simple deductions or substitutions, which should be deemed to fall within the scope of protection of this patent.
Claims
1. A safety box for methanol autothermal reforming to produce hydrogen, characterized by: It includes a box body, wherein a first space and a second space are provided in the box body, wherein non-explosion-proof equipment is provided in the first space, and a combustion mechanism is provided in the second space, wherein the second space includes an inner liner and an outer wall, an air flow layer is provided between the inner liner and the outer wall, a fan is provided between the air flow layer and the combustion mechanism, and the fan is used to transport the air in the air flow layer to the combustion mechanism, an air intake pipe is provided on one side of the combustion mechanism, and an exhaust gas outlet pipe is provided on the other side, an air intake channel is provided at the bottom of the second space, and an air outlet channel is provided between the top of the inner liner and the air flow layer.
2. A safety box for hydrogen production by methanol autothermal reforming as claimed in claim 1, characterized in that: The combustion mechanism includes a catalytic burner, a thermal burner, a biomass burner, an electric heating burner direct-fired heater or a horizontal heater.
3. A safety box for hydrogen production by methanol autothermal reforming as claimed in claim 1, characterized in that: A third space is provided on one side of the tail gas outlet pipe, a reforming reactor is provided in the third space, and an exhaust pipe is provided on one side of the third space, the exhaust pipe runs through the second space and communicates with the atmosphere.
4. A safety box for hydrogen production by methanol autothermal reforming as claimed in claim 3, characterized in that: A methanol storage tank and a purification device are respectively provided on both sides of the third space, and the methanol storage tank and the purification device are respectively communicated with the reforming reactor.
5. A safety box for hydrogen production by methanol autothermal reforming as claimed in claim 1, characterized in that: The exhaust gas outlet pipeline is provided with a temperature detector, and the temperature detector is connected to the fan signal.
6. A safety box for hydrogen production by methanol autothermal reforming as claimed in claim 1, characterized in that: The non-explosion-proof equipment includes an electrical cabinet and a chiller.
7. A safety box for producing hydrogen by methanol autothermal reforming as claimed in claim 1, characterized in that: The bottom of the box body is provided with universal wheels.