CN220812644U - Temperature-control ion-control single-parallel PEM water electrolysis hydrogen production system - Google Patents
Temperature-control ion-control single-parallel PEM water electrolysis hydrogen production system Download PDFInfo
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- CN220812644U CN220812644U CN202322662789.4U CN202322662789U CN220812644U CN 220812644 U CN220812644 U CN 220812644U CN 202322662789 U CN202322662789 U CN 202322662789U CN 220812644 U CN220812644 U CN 220812644U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 284
- 239000001257 hydrogen Substances 0.000 title claims abstract description 60
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 60
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000000746 purification Methods 0.000 claims abstract description 48
- 238000000926 separation method Methods 0.000 claims abstract description 42
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000001301 oxygen Substances 0.000 claims abstract description 34
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 34
- 239000000498 cooling water Substances 0.000 claims abstract description 22
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 14
- 238000012806 monitoring device Methods 0.000 claims description 12
- 239000003595 mist Substances 0.000 claims 2
- 239000008213 purified water Substances 0.000 description 28
- 238000010248 power generation Methods 0.000 description 10
- 238000012544 monitoring process Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model discloses a temperature-control ion-control single-parallel PEM water electrolysis hydrogen production system, which comprises a water supply purification module, an oxygen separation module, a hydrogen separation module, a PEM electrolysis tank, a cooling water pump, a first ion filter and a PTC heater, wherein the water supply purification module is connected with the oxygen separation module in series; the water supply purification module is connected with the oxygen separation module, the oxygen separation module is connected with the water outlet of the PEM electrolytic tank, the hydrogen separation module is connected with the hydrogen outlet of the PEM electrolytic tank, the oxygen separation module is connected with the inlet of the first ion filter, the outlet of the first ion filter is connected with the inlet of the cooling water pump, the oxygen separation module is connected with the inlet of the PTC heater, the outlet of the PTC heater is connected with the inlet of the cooling water pump, and the outlet of the cooling water pump is connected with the water inlet of the PEM electrolytic tank. The utility model can widen the adjustable range of the water flow in the system without improving other parts of the system, improve the temperature control efficiency of the system and reduce the possibility of dry burning of the PTC heater.
Description
Technical Field
The utility model relates to the technical field of PEM water electrolysis hydrogen production, in particular to a temperature-control ion-control single-parallel PEM water electrolysis hydrogen production system.
Background
The PEM water electrolysis hydrogen production technology is applied to the coupling of the wind power generation field and the photovoltaic power generation field, so that the problem that the wind power generation and the photovoltaic power generation cannot be frequently integrated into a power grid is effectively solved, and the economic effectiveness of the wind power generation and the photovoltaic power generation is further improved. However, because wind power generation and photovoltaic power generation are mainly concentrated in North China, a PEM water electrolysis hydrogen production system inevitably works in a low-temperature environment, and how to control the working temperature of a PEM electrolysis tank becomes an important problem.
The temperature control mode adopted by the PEM water electrolysis hydrogen production system in the prior art is to treat water output by a cooling water pump sequentially through a PTC heater and an ion filter which are connected in series and then input the treated water into a PEM electrolytic tank for use, and particularly referring to FIG. 1, the temperature control mode has the following technical problems: firstly, because the flow resistance of the PTC heater and the ion filter is overlarge, and the characteristics of intermittence, periodicity and randomness of wind power generation and photovoltaic power generation are added, the water flow of the system cannot be regulated in a wide range; and secondly, the PTC heater and the ion filter are arranged in series, so that the temperature control efficiency of the system is low, and the response hysteresis is strong.
Disclosure of utility model
The utility model provides a temperature-control ion single parallel PEM water electrolysis hydrogen production system, which solves one or more technical problems in the prior art and at least provides a beneficial selection or creation condition.
The utility model provides a temperature-control ion-control single-parallel PEM water electrolysis hydrogen production system, which comprises a water supply purification module, an oxygen separation module, a hydrogen separation module, a PEM electrolysis tank, a cooling water pump, a first ion filter and a PTC heater, wherein the water supply purification module is connected with the oxygen separation module in series;
The water supply purification module is connected with the oxygen separation module, the oxygen separation module is connected with the water outlet of the PEM electrolytic tank, the hydrogen separation module is connected with the hydrogen outlet of the PEM electrolytic tank, the oxygen separation module is connected with the inlet of the first ion filter, the outlet of the first ion filter is connected with the inlet of the cooling water pump, the oxygen separation module is connected with the inlet of the PTC heater, the outlet of the PTC heater is connected with the inlet of the cooling water pump, and the outlet of the cooling water pump is connected with the water inlet of the PEM electrolytic tank.
Further, the water supply purification module comprises a first particle filter, a purification water tank, a first stop valve, a second particle filter, a purification water pump, a second ion filter and a three-way valve;
The water inlet of the purification water tank is connected with the first particle filter, the water outlet of the purification water tank is connected with the inlet of the first stop valve, the outlet of the first stop valve is connected with the inlet of the second particle filter, the outlet of the second particle filter is connected with the inlet of the purification water pump, the outlet of the purification water pump is connected with the inlet of the second ion filter, the outlet of the second ion filter is connected with the inlet of the three-way valve, and the first outlet of the three-way valve is connected with the water return port of the purification water tank.
Further, the oxygen separation module comprises an anode gas-water separator, an anode demister, an anode backpressure valve and a third particulate filter;
The water inlet of the anode gas-water separator is connected with the second outlet of the three-way valve, the air outlet of the anode gas-water separator is connected with the inlet of the anode demister, the outlet of the anode demister is externally connected with an oxygen storage container through the anode backpressure valve, the water return port of the anode gas-water separator is connected with the water outlet of the PEM electrolytic tank, the water outlet of the anode gas-water separator is connected with the inlet of the third particulate filter, and the outlet of the third particulate filter is respectively connected with the inlet of the first ionic filter and the inlet of the PTC heater.
Further, the hydrogen separation module comprises a cathode gas-water separator, a cathode demister, a condenser, a second stop valve, a buffer, a deaerator, a dryer and a cathode back pressure valve;
The air inlet of the cathode gas-water separator is connected with the hydrogen outlet of the PEM electrolytic tank, the air outlet of the cathode gas-water separator is connected with the inlet of the cathode demister, the outlet of the cathode demister is connected with the inlet of the condenser, the water outlet of the condenser is connected with the water return port of the cathode gas-water separator, the outlet of the condenser is connected with the inlet of the buffer through the second stop valve, the outlet of the buffer is connected with the inlet of the deaerator, the outlet of the deaerator is connected with the inlet of the dryer, and the outlet of the dryer is externally connected with a hydrogen storage container through the cathode back pressure valve.
Further, the hydrogen separation module further comprises a water return valve, and the water outlet of the cathode gas-water separator is connected with the outlet of the first stop valve through the water return valve.
Further, the hydrogen separation module further comprises a pressure relief valve, and an exhaust port of the cathode gas-water separator is externally connected with the atmosphere through the pressure relief valve.
Further, a liquid level sensor is arranged in the purification water tank, an online conductivity meter is arranged at a water outlet of the purification water tank, and a flow sensor is arranged at a water inlet of the purification water tank.
Further, a liquid level sensor is arranged in the anode gas-water separator.
Further, a liquid level sensor is arranged in the cathode gas-water separator.
Further, a temperature and pressure monitoring device and an online conductivity meter are arranged at a water inlet of the PEM electrolytic tank, a temperature and pressure monitoring device is arranged at a water outlet of the PEM electrolytic tank, and a pressure sensor is arranged at a hydrogen outlet of the PEM electrolytic tank.
The utility model has at least the following beneficial effects: by adding the water supply purification module, the conductivity of the water supply flowing into the PEM electrolytic tank can be effectively reduced, the condition that the PEM electrolytic tank is damaged due to sudden water-free supply during operation is avoided, and the PEM electrolytic tank can be smoothly stopped under the condition of water-free supply. Through setting up ion filter and PTC heater parallelly connected at cooling water pump's entry, can be under the prerequisite that does not improve other spare parts of system, the adjustable scope of water flow in the system is widened to promote the accuse temperature efficiency of system, improve the hysteresis quality of temperature response, reduce the possibility of PTC heater dry combustion method simultaneously, reduce the start-up time of system.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate and do not limit the utility model.
FIG. 1 is a schematic illustration of a specific construction of a prior art PEM hydro-electrolytic hydrogen production system;
FIG. 2 is a schematic frame diagram of a temperature-controlled ion single parallel PEM hydro-electrolytic hydrogen production system in an embodiment of the utility model;
FIG. 3 is a schematic diagram of a specific structure of a temperature-controlled ion single parallel PEM hydro-electrolytic hydrogen production system in an embodiment of the utility model.
Reference numerals: 10-first particle filter, 11-purification water tank, 12-first stop valve, 13-second particle filter, 14-purification water pump, 15-second ion filter, 16-three-way valve, 20-anode gas-water separator, 21-third particle filter, 22-anode demister, 23-anode back pressure valve, 30-cooling water pump, 31-first ion filter, 32-PTC heater, 40-PEM electrolytic tank, 50-cathode gas-water separator, 51-cathode demister, 52-water return valve, 53-condenser, 54-second stop valve, 55-buffer, 56-deaerator, 57-dryer, 58-cathode back pressure valve, 59-pressure relief valve.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
It should be noted that although functional block diagrams are depicted as block diagrams, and logical sequences are shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the block diagrams in the system. The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Referring to fig. 2 to 3, fig. 2 to 3 are schematic structural diagrams of a temperature-controlled ion-controlled single parallel PEM water electrolysis hydrogen production system according to an embodiment of the present utility model, wherein the system includes a water supply purification module, an oxygen separation module, a cooling water pump 30, a first ion filter 31, a PTC heater 32, a PEM electrolyzer 40 and a hydrogen separation module;
The water supply purification module is connected with the oxygen separation module, the oxygen separation module is connected with the water outlet of the PEM electrolytic tank 40, the hydrogen outlet of the PEM electrolytic tank 40 is connected with the hydrogen separation module, the oxygen separation module is connected with the inlet of the first ion filter 31, the outlet of the first ion filter 31 is connected with the inlet of the cooling water pump 30, the oxygen separation module is connected with the inlet of the PTC heater 32, the outlet of the PTC heater 32 is connected with the inlet of the cooling water pump 30, and the outlet of the cooling water pump 30 is connected with the water inlet of the PEM electrolytic tank 40.
It should be noted that, the English of PEM is called Proton Exchange Membrane, which is translated into proton exchange membrane; the english language of PTC is known as Positive Temperature Coefficient and translates to a positive temperature coefficient.
In the practical application process, the first ion filter 31 is used for assisting in adjusting the water inlet conductivity of the PEM electrolyzer 40, and the PTC heater 32 is used for adjusting the water inlet temperature of the PEM electrolyzer 40; compared with the PEM water electrolysis hydrogen production system in the prior art provided in fig. 1, by establishing the parallel relationship between the first ion filter 31 and the PTC heater 32, the problem of overlarge flow resistance of the first ion filter 31 and the PTC heater 32 can be solved, the adjustable range of water flow in the whole system can be widened, the temperature control efficiency of the system can be improved, and the hysteresis of the temperature response can be improved; and by arranging the first ion filter 31 and the PTC heater 32 in parallel at the inlet of the cooling water pump 30, the water flow rate flowing through the first ion filter 31 and the PTC heater 32 can be further improved, which helps to better reduce the conductivity of the feed water flowing into the PEM electrolyzer 40, and also reduces the possibility of dry burning of the PTC heater 32, and also reduces the start-up time of the system.
In the embodiment of the utility model, the water supply purification module specifically comprises a first particle filter 10, a purification water tank 11, a first stop valve 12, a second particle filter 13, a purification water pump 14, a second ion filter 15 and a three-way valve 16;
The inlet of the first particulate filter 10 is connected with external pure water supply equipment or tap water supply equipment, the outlet of the first particulate filter 10 is connected with the water inlet of the purification water tank 11, the water outlet of the purification water tank 11 is connected with the inlet of the first stop valve 12, the outlet of the first stop valve 12 is connected with the inlet of the second particulate filter 13, the outlet of the second particulate filter 13 is connected with the inlet of the purification water pump 14, the outlet of the purification water pump 14 is connected with the inlet of the second ionic filter 15, the outlet of the second ionic filter 15 is connected with the inlet of the three-way valve 16, and the first outlet of the three-way valve 16 is connected with the water return port of the purification water tank 11.
In practice, the first particulate filter 10 is used to reduce particulates in the external water supply to avoid damage or clogging of bipolar plates in the PEM electrolyzer 40 by such particulates; the purified water tank 11 is used for storing purified water flowing in from a water inlet and a water return thereof so as to avoid damage to the PEM electrolyzer 40 caused by sudden no water supply during operation, while ensuring that the PEM electrolyzer 40 can be smoothly shut down in the absence of water supply; the first stop valve 12 is used for adjusting the back end pressure of the purified water pump 14 to avoid that the cathode side backflow water of the PEM electrolyzer 40 cannot flow back effectively; the second particulate filter 13 is configured to reduce particulate matters in the purified water provided by the purified water tank 11, so as to improve the water inlet cleanliness of the purified water pump 14, and avoid bearing wear or locked rotation of the purified water pump 14 caused by impurities in the water; the purified water pump 14 can be arranged as a high-pressure purified water pump or a low-pressure purified water pump according to the actual requirements of the system, and is used for providing purified water with high cleanliness for the PEM electrolytic tank 40; the three-way valve 16 serves to isolate high-conductivity purified water and low-conductivity purified water from the purified water supplied from the second ion filter 15.
By sequentially connecting the water outlet of the purification water tank 11, the first stop valve 12, the second particulate filter 13, the purification water pump 14, the second ion filter 15, the three-way valve 16 and the water return port of the purification water tank 11 to form a circulation structure, the conductivity of the purified water flowing into the PEM electrolytic tank 40 can be reduced to meet the operation requirement thereof, and meanwhile, the ion circulation inside the system can be realized under the auxiliary effect of the second ion filter 15.
In addition, a level sensor (hereinafter, described as a first level sensor, denoted by a symbol LLS in fig. 3) is disposed on the inner bottom surface of the purified water tank 11 to monitor the current water storage amount of the purified water tank 11, and to ensure that the level of the purified water tank 11 is maintained within a range of [ (2/3) ×v, (3/4) ×v ], V being the total volume of the purified water tank 11, in the special case of emergency water break, etc., and that the lower limit value of the level of the purified water tank 11 should be (4/3) ×t, T being the water consumption required to satisfy the system operation for one hour; of course, the first liquid level sensor may be disposed on the inner top surface of the purified water tank 11, which is not limited in the present utility model.
Furthermore, an on-line conductivity meter (hereinafter, described separately as a first on-line conductivity meter, denoted by symbol C in fig. 3) is disposed at the water outlet of the purification tank 11 to monitor the water outlet conductivity of the purification tank 11; a flow sensor (indicated by symbol F in fig. 3) is disposed at the water inlet of the purified water tank 11 to monitor the inflow rate of the purified water tank 11.
It should be noted that, the first liquid level sensor, the first online conductivity meter and the flow sensor are all in communication connection with an external system control device to complete uploading of relevant monitoring data, so that a worker can conveniently know the operation condition of the purified water tank 11.
In the embodiment of the utility model, the oxygen separation module specifically comprises an anode gas-water separator 20, a third particle filter 21, an anode demister 22 and an anode backpressure valve 23;
The second outlet of the three-way valve 16 is connected with the water inlet of the anode gas-water separator 20, the air outlet of the anode gas-water separator 20 is connected with the inlet of the anode demister 22, the outlet of the anode demister 22 is connected with the inlet of the anode backpressure valve 23, the outlet of the anode backpressure valve 23 is connected with an external oxygen storage container, and the water return port of the anode gas-water separator 20 is connected with the water outlet of the PEM electrolytic tank 40;
The water outlet of the anode gas-water separator 20 is connected to the inlet of the third particulate filter 21, the outlet of the third particulate filter 21 is connected to the inlet of the first ionic filter 31 and forms a connecting pipeline (hereinafter, described as a first connecting pipeline in a distinguishing manner), a first three-way pipe is arranged on the first connecting pipeline, and the inlet of the PTC heater 32 is connected to the first connecting pipeline through the first three-way pipe;
In addition, the outlet of the first ion filter 31 is connected to the inlet of the cooling water pump 30 and forms a connection line (hereinafter, described separately as a second connection line) on which a second tee is provided, through which the outlet of the PTC heater 32 is connected to the second connection line.
In the practical application process, the low-conductivity purified water provided by the second outlet of the three-way valve 16 and the unreacted water provided by the PEM electrolyzer 40 are subjected to gas-water separation treatment by the anode gas-water separator 20, and the generated oxygen is stored in the oxygen storage container when the anode back pressure valve 23 is in an open state after being subjected to demisting treatment by the anode demister 22; the water stored in the anode gas-water separator 20 is filtered by the third particulate filter 21 and then continuously flows through the first ion filter 31 and the PTC heater 32 to be treated.
In addition, a liquid level sensor (hereinafter, described as a second liquid level sensor by a symbol LLS in fig. 3) is arranged on the inner bottom surface of the anode gas-water separator 20 to monitor the current water storage capacity of the anode gas-water separator 20, and the second liquid level sensor is in communication connection with the external system control device to complete the uploading of relevant monitoring data, so that the staff can know the water storage condition of the anode gas-water separator 20 conveniently; of course, the second liquid level sensor may also be disposed on the inner top surface of the anode gas-water separator 20, which is not limited in the present utility model.
The following limitations are made for the arrangement positions of the water inlet, the water outlet, the air outlet and the water return port of the anode gas-water separator 20:
Firstly, the water return port of the anode gas-water separator 20 should be lower than the water inlet port thereof and be opposite to each other, so that the anode gas-water separator 20 stores more purified water, and the cooling water pump 30 is prevented from sucking gas;
Secondly, the water return port of the anode gas-water separator 20 should be higher than the water outlet thereof and arranged opposite to each other so as to avoid the discharge of oxygen from the water outlet thereof;
Third, the exhaust port of the anode gas-water separator 20 should be higher than the water inlet, water return port and water outlet thereof, and is preferably provided at the top of the anode gas-water separator 20 so that the produced oxygen is discharged from the exhaust port thereof as much as possible by using the low density of the oxygen.
In the embodiment of the utility model, the hydrogen separation module specifically comprises a cathode gas-water separator 50, a cathode demister 51, a water return valve 52, a condenser 53, a second stop valve 54, a buffer 55, a deaerator 56, a dryer 57, a cathode back pressure valve 58 and a pressure relief valve 59;
The hydrogen outlet of the PEM electrolyzer 40 is connected to the air inlet of the cathode gas-water separator 50, the air outlet of the cathode gas-water separator 50 is connected to the inlet of the cathode demister 51, the water outlet of the cathode gas-water separator 50 is connected to the inlet of the water return valve 52, the outlet of the water return valve 52 is connected to the outlet of the first stop valve 12, the outlet of the cathode demister 51 is connected to the inlet of the condenser 53, the water outlet of the condenser 53 is connected to the water return port of the cathode gas-water separator 50, the outlet of the condenser 53 is connected to the inlet of the second stop valve 54, the outlet of the second stop valve 54 is connected to the inlet of the buffer 55, the outlet of the buffer 55 is connected to the inlet of the deaerator 56, the outlet of the deaerator 56 is connected to the inlet of the dryer 57, the outlet of the dryer 57 is connected to the inlet of the cathode back pressure valve 58, the outlet of the cathode back pressure valve 58 is connected to an external hydrogen storage container, the outlet of the cathode gas-water separator 50 is connected to the inlet of the valve 59, and the outlet of the cathode back pressure valve 59 is connected to the atmosphere.
More specifically, the connection between the outlet of the water return valve 52 and the outlet of the first stop valve 12 is represented by: the inlet of the second particulate filter 13 is connected to the outlet of the first shut-off valve 12 and forms a connecting line (hereinafter, described as a third connecting line), a third three-way pipe is provided on the third connecting line, and the outlet of the water return valve 52 is connected to the third connecting line through the third three-way pipe.
More specifically, the connection between the inlet of the relief valve 59 and the exhaust port of the cathode gas-water separator 50 is represented by: the inlet of the cathode demister 51 is connected to the exhaust port of the cathode gas-water separator 50 and forms a connecting line (hereinafter, described as a fourth connecting line), a fourth three-way pipe is disposed on the fourth connecting line, and the inlet of the pressure release valve 59 is connected to the fourth connecting line through the fourth three-way pipe.
In the practical application process, the hydrogen gas mixed with water provided by the hydrogen outlet of the PEM electrolyzer 40 is subjected to gas-water separation treatment by the cathode gas-water separator 50, the generated hydrogen gas is firstly subjected to demisting treatment by the cathode demister 51 and then is subjected to condensation treatment by the condenser 53, and then is continuously and uniformly and slowly led out to the deaerator 56 by the buffer 55 under the state that the second stop valve 54 is opened so as to remove oxygen components mixed with the deaerator 56, and finally is subjected to drying treatment by the dryer 57 and then is stored in the hydrogen storage container under the state that the cathode back pressure valve 58 is opened; the water stored in the cathode gas-water separator 50 can be pumped back to the purified water tank 11 by the purified water pump 14 when the water return valve 52 is in an open state.
In addition, the pressure relief valve 59 can be arranged as a mechanical pressure relief valve or an electric pressure relief valve according to the actual requirement of the system, and the cathode side pressure of the PEM electrolytic cell 40 is regulated by the pressure relief valve 59 so as to enable the PEM electrolytic cell 40 to work within an allowable pressure range, thereby avoiding damage of the PEM electrolytic cell 40 caused by overpressure of the cathode side; by optimizing the connection location of the water return valve 52, it is possible to avoid too high conductivity by introducing the water stored inside the cathode gas-water separator 50 directly to the cathode side of the PEM electrolyzer 40, as compared to the prior art PEM water electrolysis hydrogen production system provided in fig. 1.
In addition, a liquid level sensor (hereinafter, referred to as a third liquid level sensor, which is denoted by a symbol LLS in fig. 3) is disposed on the inner bottom surface of the cathode gas-water separator 50 to monitor the current water storage capacity of the cathode gas-water separator 50, and the third liquid level sensor is in communication connection with the external system control device to complete the uploading of relevant monitoring data, so that the staff can know the water storage condition of the cathode gas-water separator 50 conveniently; of course, the third liquid level sensor may be disposed on the inner top surface of the cathode gas-water separator 50, which is not limited in the present utility model.
The following limitations are made for the arrangement of the air inlet, the water outlet, the air outlet and the water return port of the cathode gas-water separator 50:
Firstly, the air inlet of the cathode gas-water separator 50 should be higher than the water return port thereof and arranged oppositely;
secondly, the air inlet of the cathode gas-water separator 50 should be higher than the water outlet thereof and arranged opposite to each other so as to avoid the discharge of hydrogen from the water outlet thereof;
Third, the exhaust port of the cathode gas-water separator 50 should be higher than the inlet, return water port and water outlet thereof, and is preferably provided at the top of the cathode gas-water separator 50 so that the produced hydrogen is discharged from the exhaust port thereof as much as possible by using the low density of the hydrogen.
In the embodiment of the present utility model, the basic operation condition of the PEM electrolyzer 40 needs to be monitored in real time to ensure the stable and reliable operation, specifically, the following settings are made:
A temperature and pressure monitoring device (hereinafter described as a first temperature and pressure monitoring device) is arranged at the water inlet of the PEM electrolyzer 40, and comprises a first temperature sensor (denoted by the symbol T in fig. 3) for monitoring the water inlet temperature of the PEM electrolyzer 40 and a first pressure sensor (denoted by the symbol P in fig. 3) for monitoring the water inlet pressure of the PEM electrolyzer 40; an in-line conductivity meter (hereinafter separately described as a second in-line conductivity meter, indicated by symbol C in fig. 3) is disposed at the water inlet of the PEM electrolyzer 40 to monitor the water inlet conductivity of the PEM electrolyzer 40; of course, the first temperature and pressure monitoring device may also directly adopt a temperature and pressure integrated sensor, which is not limited in the present utility model.
A temperature and pressure monitoring device (hereinafter described as a second temperature and pressure monitoring device) is arranged at the water outlet of the PEM electrolyzer 40, and comprises a second temperature sensor (denoted by the symbol T in fig. 3) for monitoring the water outlet temperature of the PEM electrolyzer 40 and a second pressure sensor (denoted by the symbol P in fig. 3) for monitoring the water outlet pressure of the PEM electrolyzer 40; of course, the second temperature and pressure monitoring device may also directly adopt a temperature and pressure integrated sensor, which is not limited in the present utility model.
A pressure sensor (hereinafter described separately as a third pressure sensor, indicated by the symbol P in fig. 3) is disposed at the hydrogen outlet of the PEM electrolyzer 40 to monitor the hydrogen outlet pressure of the PEM electrolyzer 40.
It should be noted that, the first temperature and pressure monitoring device, the second online conductivity meter, the second temperature and pressure monitoring device and the third pressure sensor are all in communication connection with the external system control device to complete uploading of relevant monitoring data, so that a worker can conveniently know the operation state of the PEM electrolyzer 40.
While the preferred embodiment of the present utility model has been described in detail, the present utility model is not limited to the above embodiment, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present utility model, and these equivalent modifications and substitutions are intended to be included in the scope of the present utility model as defined in the appended claims.
Claims (10)
1. The temperature-control ion single-parallel PEM water electrolysis hydrogen production system is characterized by comprising a water supply purification module, an oxygen separation module, a hydrogen separation module, a PEM electrolytic tank, a cooling water pump, a first ion filter and a PTC heater;
The water supply purification module is connected with the oxygen separation module, the oxygen separation module is connected with the water outlet of the PEM electrolytic tank, the hydrogen separation module is connected with the hydrogen outlet of the PEM electrolytic tank, the oxygen separation module is connected with the inlet of the first ion filter, the outlet of the first ion filter is connected with the inlet of the cooling water pump, the oxygen separation module is connected with the inlet of the PTC heater, the outlet of the PTC heater is connected with the inlet of the cooling water pump, and the outlet of the cooling water pump is connected with the water inlet of the PEM electrolytic tank.
2. The temperature-controlled ion single parallel PEM water electrolysis hydrogen production system of claim 1, wherein said water supply purification module comprises a first particulate filter, a purification water tank, a first shut-off valve, a second particulate filter, a purification water pump, a second ion filter, and a three-way valve;
The water inlet of the purification water tank is connected with the first particle filter, the water outlet of the purification water tank is connected with the inlet of the first stop valve, the outlet of the first stop valve is connected with the inlet of the second particle filter, the outlet of the second particle filter is connected with the inlet of the purification water pump, the outlet of the purification water pump is connected with the inlet of the second ion filter, the outlet of the second ion filter is connected with the inlet of the three-way valve, and the first outlet of the three-way valve is connected with the water return port of the purification water tank.
3. The temperature-controlled ion single parallel PEM water electrolysis hydrogen production system of claim 2, wherein said oxygen separation module comprises an anode gas-water separator, an anode mist eliminator, an anode backpressure valve, and a third particulate filter;
The water inlet of the anode gas-water separator is connected with the second outlet of the three-way valve, the air outlet of the anode gas-water separator is connected with the inlet of the anode demister, the outlet of the anode demister is externally connected with an oxygen storage container through the anode backpressure valve, the water return port of the anode gas-water separator is connected with the water outlet of the PEM electrolytic tank, the water outlet of the anode gas-water separator is connected with the inlet of the third particulate filter, and the outlet of the third particulate filter is respectively connected with the inlet of the first ionic filter and the inlet of the PTC heater.
4. The temperature-controlled ion single parallel PEM water electrolysis hydrogen production system of claim 2, wherein the hydrogen separation module comprises a cathode gas-water separator, a cathode mist eliminator, a condenser, a second shut-off valve, a buffer, a deaerator, a dryer, and a cathode back pressure valve;
The air inlet of the cathode gas-water separator is connected with the hydrogen outlet of the PEM electrolytic tank, the air outlet of the cathode gas-water separator is connected with the inlet of the cathode demister, the outlet of the cathode demister is connected with the inlet of the condenser, the water outlet of the condenser is connected with the water return port of the cathode gas-water separator, the outlet of the condenser is connected with the inlet of the buffer through the second stop valve, the outlet of the buffer is connected with the inlet of the deaerator, the outlet of the deaerator is connected with the inlet of the dryer, and the outlet of the dryer is externally connected with a hydrogen storage container through the cathode back pressure valve.
5. The temperature-controlled ion single parallel PEM water electrolysis hydrogen production system of claim 4, wherein said hydrogen separation module further comprises a water return valve through which the water outlet of said cathode gas-water separator is connected to the outlet of said first shut-off valve.
6. The temperature-controlled ion single parallel PEM water electrolysis hydrogen production system of claim 4, wherein said hydrogen separation module further comprises a pressure relief valve through which an exhaust port of said cathode gas-water separator is externally connected to the atmosphere.
7. The temperature-controlled ion single parallel PEM water electrolysis hydrogen production system of claim 2 wherein a liquid level sensor is disposed inside the purification water tank, an on-line conductivity meter is disposed at the water outlet of the purification water tank, and a flow sensor is disposed at the water inlet of the purification water tank.
8. A temperature-controlled ion single parallel PEM water electrolysis hydrogen production system according to claim 3 wherein a liquid level sensor is provided inside said anode gas-water separator.
9. The temperature-controlled ion single parallel PEM water electrolysis hydrogen production system of claim 4, wherein a liquid level sensor is disposed inside said cathode gas-water separator.
10. The temperature-controlled ion single parallel PEM water electrolysis hydrogen production system according to claim 1, wherein a temperature-pressure monitoring device and an on-line conductivity meter are arranged at the water inlet of the PEM electrolyzer, a temperature-pressure monitoring device is arranged at the water outlet of the PEM electrolyzer, and a pressure sensor is arranged at the hydrogen outlet of the PEM electrolyzer.
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