Heating system for hydrogen purification equipment
By using a combination solution of gas heating medium and catalytic oxidation reactor in the hydrogen purification equipment, the problems of high power consumption, uneven heating and insufficient heat medium temperature in the prior art are solved, and efficient and uniform heating of hydrogen purification equipment is achieved, meeting the temperature requirements of purification equipment above 450°C.
Patent Information
- Application Number
- CN202421515339.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing preheating methods of hydrogen purification equipment have problems such as high power consumption, uneven heating and insufficient heat medium temperature, which cannot meet the temperature requirements of purification equipment above 450℃.
A heating system for hydrogen purification equipment is provided, including an auxiliary heating device, a catalytic oxidation reactor and a purification equipment. The auxiliary heating device uses gas as heating medium to preheat and insulate the purification equipment through a catalytic oxidation reactor to achieve efficient heat exchange.
It reduces the power consumption, realizes uniform heating of the purification equipment, avoids the maintenance problems of the electric heating sheet, and increases the temperature of the heat medium, meeting the temperature requirements of the purification equipment above 450℃.
Smart Images
Figure CN222943251U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of methanol hydrogen production, in particular to a heating system for hydrogen purification equipment. Background Art
[0002] In the process of producing hydrogen from methanol, the initially produced hydrogen is often mixed with other impurity gases, and the mixed gas needs further purification to obtain high-purity hydrogen. The hydrogen purification equipment needs to be preheated to above 450°C before the purification operation can be carried out. At the same time, during the purification process and when the purification operation is temporarily stopped, the hydrogen purification equipment also needs to be heated to compensate for heat loss and maintain the purification operation temperature.
[0003] The existing preheating methods mainly include preheating with electric heating plates and circulating preheating with heat transfer oil as the heat medium. Preheating with electric heating plates consumes a lot of electricity during the long and continuous preheating process, and is prone to local high temperatures and uneven heating. The repair and replacement of damaged electric heating plates requires disassembly of the purification equipment, which is time-consuming and labor-intensive. For circulating preheating with heat transfer oil as the heat medium, ordinary mineral heat transfer oil is generally used for a long time at 280°C, and the maximum operating temperature is 300°C; even for synthetic heat transfer oil, the maximum temperature can only reach 400°C, which cannot meet the temperature requirement of 450°C for purification equipment. Utility Model Content
[0004] In view of the deficiencies of the prior art, the present invention provides the following technical solutions:
[0005] Provided is a heating system for hydrogen purification equipment, comprising an auxiliary heating device, a catalytic oxidation reactor and a purification equipment; the auxiliary heating device is used to preheat the catalytic oxidation reactor and the purification equipment, and to keep the purification equipment warm when the purification operation is suspended; the catalytic oxidation reactor is used to heat the purification equipment, and to keep the purification equipment warm during the purification operation;
[0006] The heating medium of the auxiliary heating device is gas, and the auxiliary heating device is provided with a gas inlet and a gas outlet; the catalytic oxidation reactor is provided with a reactor inlet and a reactor outlet; the purification equipment is provided with a heat inlet and a heat outlet; the gas outlet is connected to the reactor inlet; the reactor outlet is connected to the heat inlet.
[0007] Preferably, the heating system is also provided with a heat exchanger, and the heat exchanger is provided with a first heat exchange inlet, a first heat exchange outlet, a second heat exchange inlet, and a second heat exchange outlet; the first heat exchange inlet can be introduced into the methanol liquid, and the first heat exchange outlet is connected with the reactor inlet; the second heat exchange inlet is connected with the heat outlet, and the second heat exchange outlet is emptied.
[0008] Preferably, the heating system is further provided with a first temperature detector, a second temperature detector, a third temperature detector and a fourth temperature detector; the first temperature detector is arranged at the gas outlet; the second temperature detector is arranged at the reactor outlet; the third temperature detector is arranged in the purification equipment; and the fourth temperature detector is arranged at the second heat exchange outlet.
[0009] Preferably, the heating system is further provided with a compressor and a methanol metering pump; the methanol metering pump is arranged before the first heat exchange inlet to control the flow rate of the methanol liquid; the compressor is arranged before the gas inlet to compress the heating medium.
[0010] Preferably, the heating system is further provided with a regulating valve and a flow meter; the regulating valve is arranged after the compressor, and the flow meter is arranged between the regulating valve and the gas inlet.
[0011] Preferably, the heating system also includes a first check valve and a second check valve, the gas collecting pipe is arranged in front of the reactor inlet, and the gas collecting pipe is connected to the reactor inlet; the first check valve is arranged between the first thermostat and the gas collecting pipe; the second check valve is arranged between the first heat exchange outlet and the gas collecting pipe.
[0012] Preferably, the heating system further comprises a programmable controller, which is used to control the temperature and flow rate of the heating system and to monitor and adjust various devices in the system.
[0013] Preferably, the first to fourth temperature detectors are all temperature sensors.
[0014] Preferably, the heating medium is air.
[0015] Preferably, the auxiliary heating device is an electric heater.
[0016] Compared with the prior art, the utility model has the following beneficial effects:
[0017] 1) Reduce power consumption;
[0018] 2) Make the purification equipment heated evenly;
[0019] 3) There is no electric heating in the purification equipment, so there is no need to repair or replace the heating plate;
[0020] 4) The temperature of the heat medium is further increased and is no longer limited to 400°C. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a flow chart of the technical solution of Example 1 of the present application;
[0022] Figure 2 This is a flow chart of the technical solution of Examples 2-3 of the present application. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] Embodiment 1:
[0025] A heating system for a hydrogen purification device, such as Figure 1 As shown, it includes an auxiliary heating device 1, a catalytic oxidation reactor 2 and a purification device 3, the heating medium of the auxiliary heating device 1 is gas; the auxiliary heating device 1 is provided with a gas inlet 11 and a gas outlet 12; the catalytic oxidation reactor 2 is provided with a reactor inlet 21 and a reactor outlet 22; the purification device 3 is provided with a heat inlet 31 and a heat outlet 32; the gas outlet 12 is connected to the reactor inlet 21 of the catalytic reactor 2, and the reactor outlet 22 is connected to the heat inlet 31 of the purification device.
[0026] During operation, external gas flows in from the gas inlet 11 of the auxiliary heating device 1 and is heated therein. After being heated to a certain temperature, it flows out from the gas outlet 12 of the auxiliary heating device 1, flows into the catalytic oxidation reactor 2 through the reactor inlet 21, and preheats the catalytic oxidation reactor 2; then flows into the purification device 3 through the reactor outlet 22 and the heat inlet 31, and preheats the purification device 3. When the temperature of the catalytic oxidation reactor 2 rises to above the catalyst activation temperature of 250°C, methanol (liquid) vapor, and air or oxygen are introduced into the gas inlet 21 of the catalytic oxidation reactor 2, and then a catalytic oxidation reaction is carried out in the catalytic reactor 2 under the action of the catalyst. The mixed hot gas generated by the catalytic oxidation reaction flows out from the reactor outlet 22 and flows into the heat inlet 31 of the purification device 3, thereby the purification device 3 performs heat exchange with the mixed hot gas, so that the temperature of the hydrogen purification device 3 is further raised until the target temperature is 450°C.
[0027] Through the above technical solution, the auxiliary heating device 1 only needs to provide heat energy during preheating and temporary suspension of purification operations. After reaching a certain temperature, the catalytic reactor 2 provides continuous heat energy for the operation of the purifier equipment 3 to keep it at 450°C.
[0028] Furthermore, the auxiliary heating device 1 may be an electric heater. The heat medium gas is preferably air, which can be used not only as a heat medium but also as a reaction material of the catalytic oxidation reactor 2, which not only saves costs but also improves production efficiency.
[0029] Embodiment 2:
[0030] This embodiment is different from Embodiment 1 in that Figure 1 and 2 As shown, the heating system is further provided with a heat exchanger 4, and the heat exchanger 4 is provided with a first heat exchange inlet 41, a first heat exchange outlet 42, a second heat exchange inlet 43, and a second heat exchange outlet 44; the first heat exchange inlet 41 is connected to a methanol liquid tank (not shown in the drawing), and the first heat exchange outlet 42 is connected to the reactor inlet 21 of the catalytic oxidation reactor 2; the second heat exchange inlet 43 is connected to the heat outlet 32 of the purification equipment 3; and the second heat exchange outlet 44 is used for emptying.
[0031] During operation, after the auxiliary heating device 1 is started, the gas heat medium exchanges heat with the catalytic oxidation reactor 2 and the purification equipment 4 respectively, and then preheats the heat exchanger 4 through the heat exchanger 4. When the temperature of the heat exchanger 4 reaches 65°C, methanol liquid is introduced through the first heat exchange inlet 41 to convert the methanol liquid into methanol vapor. Since the temperature required for the vaporization of methanol liquid is only 65°C, the residual temperature of the gas heat medium can be used to make it reach the vaporization temperature. When the temperature of the heat exchanger 4 reaches above 65°C, methanol vapor can be supplied to the catalytic oxidation reactor 2.
[0032] By arranging the heat exchanger 4 in the system, when the auxiliary heating device 1 starts heating, the methanol can be vaporized at the same time, thereby improving the heat utilization rate of the system.
[0033] Embodiment 3:
[0034] This embodiment is different from Embodiment 1 or 2 in that, Figure 2 As shown, the heating system is further provided with a compressor 5 and a methanol metering pump 6. The methanol metering pump 6 is provided between the methanol liquid tank and the first heat exchange inlet 41 of the heat exchanger 4 to control the flow rate of the methanol liquid; the compressor 5 is provided before the gas inlet 11 of the auxiliary heating device 1 to allow the gas heating medium to continuously flow into the heating system.
[0035] At the same time, the heating system is also provided with a regulating valve 13 and a flow meter 14. The regulating valve 13 is arranged after the compressor 5, and the flow meter 14 is arranged between the regulating valve 13 and the gas inlet 11 of the auxiliary heating device 1. The inflowing heating medium such as air is measured by the flow meter 14; when the flow rate is higher than the amount required by the system, especially in the reaction stage of the catalytic oxidation reactor 2, the inflow of air is adjusted by the regulating valve 13.
[0036] The heat and temperature generated by the catalytic oxidation reactor 2 are controlled by adjusting the methanol metering pump 6 and the compressed air flow rate through the regulating valve 13 and the flow meter 14, thereby achieving control of the heating rate of the purification device 3.
[0037] Furthermore, in order to monitor the temperature of each device in the heating system, the system is also provided with a first temperature detector 7, a second temperature detector 8, a third temperature detector 9 and a fourth temperature detector 10. The first temperature detector 7 is arranged at the gas outlet 12 of the auxiliary heating device 1 to monitor the heating temperature of the heating medium by the auxiliary heating device 1, and the second temperature detector 8 is arranged at the reactor outlet 22 to monitor the temperature of the heating medium after heat exchange and the temperature of the mixed hot gas; the third temperature detector 9 is arranged in the purification device 3 to monitor the heating temperature of the purification device 3, so as to control the heating rate and insulation temperature of the purification device; the fourth temperature detector 10 is arranged at the second heat exchange outlet 44 of the heat exchanger 4 to monitor the temperature of the heat exchanger 4, so as to ensure that after the methanol hydrogen production is started, the temperature of the heat exchanger 4 is always kept above the set temperature, that is, above 65°C.
[0038] In addition, in order to prevent the vaporization or gas backflow of the heating system, the heating system is also provided with a first check valve 15 and a second check valve 16. The first check valve 15 is used to prevent the backflow of the heat medium gas, so the first check valve 15 is arranged between the first thermometer 7 and the reaction inlet 21 of the catalytic oxidation reactor 2. The second check valve 16 is used to prevent the backflow of methanol vaporization gas, so the second check valve 16 is arranged between the first heat exchange outlet 41 of the heat exchanger 4 and the reaction inlet 21 of the catalytic oxidation reactor 2. It should be noted that since the heat medium gas and the methanol vaporization gas will flow into the catalytic oxidation reactor 2 through the reaction inlet 21 at the same time, in order to prevent the two gases from flowing in series, a gas collection pipe 17 is arranged in front of the reactor inlet 21, and the gas collection pipe 17 is connected to the reactor inlet 21; the first check valve 15 is arranged between the first thermometer 7 and the gas collection pipe 17; the second check valve 16 is arranged between the first heat exchange outlet 41 and the gas collection pipe 17.
[0039] Embodiment 4:
[0040] The difference between this embodiment and embodiment 1, 2 or 3 is that a programmable controller, i.e., a PLC controller, is further provided in the heating system. The PLC controller is electrically connected to the electric heating auxiliary device 1, the catalytic oxidation reactor 2, the purification equipment 3, the regulating valve 13, the flow meter 14, the first to fourth temperature detectors, the methanol metering pump 6, etc., so as to monitor and adjust the temperature, flow and various equipment of the entire system.
[0041] At this time, the first to fourth temperature detectors are all temperature sensors. The PLC controller monitors the temperature of the gas outlet 11 of the auxiliary heating device 1 through the first detection temperature sensor 7, and adjusts the temperature of the gas outlet 12 by controlling the electric power of the auxiliary heating device 1; the PLC controller detects the temperature of the reactor outlet 22 of the catalytic oxidation reactor 2, the temperature of the purification equipment 3 and the temperature of the second outlet 44 of the heat exchanger 4 through the second temperature sensor 8, the third temperature sensor 9 and the fourth temperature sensor 10, respectively, and calculates the heating rate; thereby better controlling the temperature change of the system.
[0042] In summary, the utility model reduces the use of electric energy, improves the stability and reliability of the heating hydrogen purification equipment, and also increases the temperature that can be achieved by preheating.
[0043] It should be noted that the technical features in the above-mentioned embodiments 1 to 4 can be combined in any way, and the combined technical solutions all belong to the protection scope of the present application. In this article, terms such as "including", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.
[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A heating system for hydrogen purification equipment, characterized in that: It comprises an auxiliary heating device, a catalytic oxidation reactor and a purification device; the auxiliary heating device is used to preheat the catalytic oxidation reactor and the purification device, and to keep the purification device warm when the purification operation is suspended; the catalytic oxidation reactor is used to heat the purification device, and to keep the purification device warm during the purification operation; The heating medium of the auxiliary heating device is gas, and the auxiliary heating device is provided with a gas inlet and a gas outlet; the catalytic oxidation reactor is provided with a reactor inlet and a reactor outlet; the purification equipment is provided with a heat inlet and a heat outlet; the gas outlet is connected to the reactor inlet; the reactor outlet is connected to the heat inlet.
2. The heating system according to claim 1, characterized in that The heating system is also provided with a heat exchanger, which is provided with a first heat exchange inlet, a first heat exchange outlet, a second heat exchange inlet, and a second heat exchange outlet; the first heat exchange inlet can be introduced into the methanol liquid, and the first heat exchange outlet is connected with the reactor inlet; the second heat exchange inlet is connected with the heat outlet, and the second heat exchange outlet is emptied.
3. The heating system according to claim 2, characterized in that The heating system is further provided with a first temperature detector, a second temperature detector, a third temperature detector and a fourth temperature detector; the first temperature detector is provided at the gas outlet; the second temperature detector is provided at the reactor outlet; the third temperature detector is provided in the purification device; The fourth temperature detector is disposed at the second heat exchange outlet.
4. The heating system according to claim 3, characterized in that The heating system is also provided with a compressor and a methanol metering pump; the methanol metering pump is arranged before the first heat exchange inlet for controlling the flow rate of the methanol liquid; the compressor is arranged before the gas inlet for compressing the heating medium.
5. The heating system according to claim 4, characterized in that The heating system is also provided with a regulating valve and a flow meter; the regulating valve is arranged after the compressor, and the flow meter is arranged between the regulating valve and the gas inlet.
6. The heating system according to claim 5, characterized in that The heating system also includes a first check valve and a second check valve. The gas collecting pipe is arranged in front of the reactor inlet, and the gas collecting pipe is connected to the reactor inlet; the first check valve is arranged between the first temperature detector and the gas collecting pipe; the second check valve is arranged between the first heat exchange outlet and the gas collecting pipe.
7. The heating system according to claim 6, characterized in that The heating system also includes a programmable controller, which is used to control the temperature and flow of the heating system and monitor and adjust various devices in the system.
8. The heating system according to claim 7, characterized in that The first to fourth temperature detectors are all temperature sensors.
9. The heating system according to any one of claims 1 to 8, characterized in that: The heating medium is air.
10. The heating system according to claim 9, characterized in that The auxiliary heating device is an electric heater.