CN220294409U - Water electrolysis hydrogen production drying purification cooling system - Google Patents
Water electrolysis hydrogen production drying purification cooling system Download PDFInfo
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- CN220294409U CN220294409U CN202321672573.XU CN202321672573U CN220294409U CN 220294409 U CN220294409 U CN 220294409U CN 202321672573 U CN202321672573 U CN 202321672573U CN 220294409 U CN220294409 U CN 220294409U
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- deoxidizing
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- 238000001035 drying Methods 0.000 title claims abstract description 187
- 239000001257 hydrogen Substances 0.000 title claims abstract description 104
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 104
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 238000001816 cooling Methods 0.000 title claims abstract description 70
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 238000000746 purification Methods 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000005868 electrolysis reaction Methods 0.000 title abstract description 13
- 239000000498 cooling water Substances 0.000 claims abstract description 46
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 230000008929 regeneration Effects 0.000 claims abstract description 30
- 238000011069 regeneration method Methods 0.000 claims abstract description 30
- 239000007789 gas Substances 0.000 claims abstract description 23
- 238000001179 sorption measurement Methods 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 8
- 230000008713 feedback mechanism Effects 0.000 claims description 7
- 230000001172 regenerating effect Effects 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000010354 integration Effects 0.000 abstract description 4
- 239000008399 tap water Substances 0.000 abstract description 4
- 235000020679 tap water Nutrition 0.000 abstract description 4
- 239000003507 refrigerant Substances 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 9
- 150000002431 hydrogen Chemical class 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- 238000005057 refrigeration Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000002274 desiccant Substances 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000011555 saturated liquid Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Drying Of Gases (AREA)
Abstract
The utility model relates to the technical field of electrolytic hydrogen production equipment, and discloses a dry purification cooling system for producing hydrogen by water electrolysis, which comprises a deoxidization module, a dry regeneration module and a cooling module; the deoxidizing module comprises a feed gas liquid separating tank, a deoxidizing tower, a deoxidizing cooler and a deoxidizing liquid separating tank; the drying regeneration module comprises a first drying tower, a second drying tower, a third drying tower, a drying cooler and a drying liquid separating tank; the cooling module comprises a refrigerating loop and a cooling loop, wherein the refrigerating loop comprises a compressor, an evaporator, an expansion valve and a condenser, the cooling loop comprises a main circuit connected with two ends of the evaporator, and a first branch connected with a deoxidizing cooler and a second branch connected with a drying cooler are arranged on the main circuit in parallel. Compared with a closed cooling water system adopting normal-temperature tap water, the cooling circuit of the cooling module can actively reduce the temperature of cooling water, can ensure the cooling efficiency in high-temperature weather, has high integration degree and small occupied area, and reduces the maintenance cost.
Description
Technical Field
The utility model relates to the technical field of electrolytic hydrogen production equipment, in particular to a drying, purifying and cooling system for producing hydrogen by water electrolysis.
Background
The water electrolysis hydrogen production is a process for decomposing water into hydrogen and oxygen by adopting an electrolysis method, but the prepared hydrogen contains partial oxygen and water vapor, and in order to obtain high-purity hydrogen, the hydrogen needs to be purified after the electrolysis hydrogen production.
For example, the Chinese patent with the publication number of CN218434907U discloses a hydrogen purification system, which comprises a deoxidizing module and three adsorption towers, wherein the deoxidizing module carries out heating deoxidization on hydrogen to be purified entering the hydrogen purification system; the three adsorption towers are all arranged behind the deoxidizing module, one of the three adsorption towers is a regeneration tower, the other three adsorption towers are a first drying tower and a second drying tower respectively, the regeneration towers are communicated with the deoxidizing module so as to recycle waste heat of the deoxidizing module, and the first drying tower and the second drying tower are communicated with the regeneration tower and are all used for drying hydrogen to be purified; the cooling module comprises a first cooler and a second cooler, and cools the air channels of the regeneration tower and the drying tower.
In the hydrogen purification process, the deoxidizing module and the drying and regenerating module are both required to be provided with coolers, the water vapor is cooled by the coolers, and the water vapor is discharged out of the system after being fully condensed into an amateur state, so that the aim of obtaining the dry hydrogen is fulfilled. The existing cooling generally adopts a closed cooling water system to cool water vapor, but the closed cooling water system is greatly influenced by ambient temperature, the water temperature can reach more than 40 ℃ in summer high-temperature weather, the cooling efficiency is low, and a large number of pipeline systems are required to be paved on the cooling water system, so that the occupied area is large and the maintenance cost is high.
Disclosure of Invention
The purpose of the utility model is that: the water electrolysis hydrogen production drying purification cooling system is used for solving the problems of low cooling efficiency, large occupied area and high maintenance cost of a closed cooling water system in the prior art.
In order to achieve the aim, the utility model provides a dry purification cooling system for producing hydrogen by electrolyzing water, which comprises a deoxidization module, a dry regeneration module and a cooling module;
the deoxidizing module comprises a raw gas liquid separating tank, a deoxidizing tower, a deoxidizing cooler and a deoxidizing liquid separating tank which are sequentially connected in series through pipelines, wherein the raw gas liquid separating tank is used for receiving crude hydrogen input from the outside, and the deoxidizing liquid separating tank is used for being connected with the drying and regenerating module;
the drying regeneration module comprises a first drying tower, a second drying tower and a third drying tower with adjustable working states, a drying cooler for drying hydrogen and a drying liquid separating tank, wherein the drying cooler and the drying liquid separating tank are connected in series;
the cooling module comprises a refrigerating loop and a cooling loop, the refrigerating loop comprises a compressor, an evaporator, an expansion valve and a condenser which are mutually and sequentially connected in series, the cooling loop comprises a main path connected with two ends of the evaporator, a first branch connected with the deoxidizing cooler and a second branch connected with the drying cooler are arranged on the main path in parallel, and a cooling water pump for driving cooling water to flow is further arranged on the main path.
Preferably, the electric control device further comprises a control unit, wherein the first branch and the second branch are respectively provided with an electric control valve and a temperature sensor, the electric control valves and the temperature sensors are respectively connected with the control unit in a signal mode, the temperature sensors are respectively used for detecting the temperature of cooling water and transmitting temperature signals to the control unit, and the control unit is used for receiving the temperature signals and transmitting action opening signals to the electric control valves.
Preferably, the first branch is provided with the temperature sensor at the inlet and the outlet of the deoxidizing cooler, the second branch is provided with the temperature sensor at the inlet and the outlet of the drying cooler, and each temperature sensor is in signal connection with the control unit.
Preferably, the electric control valve is a solenoid valve.
Preferably, the control unit comprises a PLC module, a valve actuating mechanism, a valve opening feedback mechanism and a current transmitter, wherein the temperature sensor is in signal connection with the PLC module, the valve actuating mechanism is used for transmitting an action opening signal to the electric regulating valve, the valve opening feedback mechanism is used for detecting a valve opening feedback signal of the valve actuating mechanism and transmitting the valve opening feedback signal to the current transmitter, and the current transmitter is in signal connection with the PLC module so as to transmit the valve opening feedback signal to the PLC module.
Preferably, the first drying tower, the second drying tower and the third drying tower have a first working state, a second working state and a third working state which are circularly switched with each other;
in the first working state, the first drying tower is used for hydrogen drying, the second drying tower is used for hydrogen regeneration, and the third drying tower is used for hydrogen adsorption;
in a second working state, the second drying tower is used for hydrogen drying, the third drying tower is used for hydrogen regeneration, and the first drying tower is used for hydrogen adsorption;
in the third working state, the third drying tower is used for hydrogen drying, the first drying tower is used for hydrogen regeneration, and the second drying tower is used for hydrogen adsorption.
Preferably, the condenser is an air-cooled condenser.
Compared with the prior art, the water electrolysis hydrogen production drying purification cooling system has the beneficial effects that: compared with a closed cooling water system adopting normal-temperature tap water, the refrigerating loop of the cooling module can realize refrigeration circulation, the refrigerant changes in state in the condenser and the evaporator and exchanges heat with cooling water in the evaporator, so that the temperature of the cooling water is actively reduced, the first branch and the second branch are respectively connected with the deoxidizing cooler and the drying cooler, the cooling water pump drives the cooling water to flow in the first branch and the second branch, and therefore hydrogen is cooled, and the cooling efficiency can be ensured in high-temperature weather; the first branch and the second branch are connected in parallel and then connected with the main circuit of the cooling loop, and a group of cooling loops simultaneously provide cooling water for the two coolers, so that the integration degree is high, the occupied area is small, and the maintenance cost is reduced; the cooling water is cooled in the evaporator, so that the water flow for the cooler can be reduced, a large amount of water resources are saved, and the cooling effect is better.
Drawings
FIG. 1 is a schematic diagram of the deoxidation module and the drying regeneration module of the water electrolysis hydrogen production drying purification cooling system;
FIG. 2 is a schematic diagram of the cooling module of the dry purification cooling system for producing hydrogen by water electrolysis according to the utility model;
FIG. 3 is a control schematic diagram of a control unit of the water electrolysis hydrogen production drying purification cooling system of the utility model.
In the figure, 1, a feed gas liquid separating tank, 2, a deoxidizing tower, 3, a deoxidizing cooler, 4, a deoxidizing liquid separating tank, 5, a first drying tower, 6, a second drying tower, 7, a third drying tower, 8, a drying cooler, 9, a drying liquid separating tank, 10, an evaporator, 11, a compressor, 12, a condenser, 13, an expansion valve, 14, a cooling water pump, 15, an electric regulating valve, 16, a temperature sensor, 17, a dry path, 18, a branch, 19, a control unit, 20, a PLC module, 21, a valve actuator, 22, a valve opening feedback mechanism, 23 and a current transmitter.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
The preferred embodiment of the cooling system for drying, purifying and cooling hydrogen by electrolysis of water, disclosed by the utility model, is shown in fig. 1 to 3, and comprises a deoxidizing module, a drying and regenerating module and a cooling module, wherein the deoxidizing module is used for deoxidizing crude hydrogen, the drying and regenerating module is used for eliminating water vapor in the hydrogen and improving the purity of the hydrogen, and the cooling module is used for cooling the hydrogen.
The deoxidizing module comprises a raw gas liquid separating tank 1, a deoxidizing tower 2, a deoxidizing cooler 3 and a deoxidizing liquid separating tank 4 which are sequentially connected in series through pipelines, and also comprises accessories such as a valve and the like arranged on the pipelines. The raw material gas separating tank 1 is used for receiving crude hydrogen input from the outside, the gas inlet of the raw material gas separating tank 1 is connected with the crude hydrogen produced by the electrolytic water hydrogen production system, and the gas outlet is connected with the gas inlet end of the deoxidizing tower 2 through a pipeline. The air inlet of the deoxidizing cooler 3 is connected with the air outlet end of the deoxidizing tower 2 through a pipeline, the air inlet of the deoxidizing liquid separating tank 4 is connected with the air outlet end of the deoxidizing cooler 3 through a pipeline, and the air outlet end of the deoxidizing liquid separating tank 4 is connected with the drying regeneration module.
The deoxidizing module removes impurities and purifies hydrogen by catalytic deoxidizing, cooling and dehumidifying, and adsorption drying. Crude hydrogen produced by the crude hydrogen electrolyzed water hydrogen production system firstly flows through a raw material gas separating tank 1 to carry out gas-liquid separation, and liquid in the hydrogen is separated out and discharged; then through the deoxidizing tower 2, the deoxidizing tower 2 is filled with normal temperature catalytic deoxidizing agent, a small amount of oxygen in the hydrogen gas is catalyzed by the catalyst and then combined with the hydrogen to generate water, so that the oxygen content is lower than 1PPm, an electric heating element is arranged in the deoxidizing tower 2, the temperature of the deoxidizing tower 2 is increased, the water generated by the reaction is brought out of the deoxidizing tower 2 in a gaseous state, and the oxygen in the hydrogen gas is removed; then cooling treatment is carried out through a deoxidizing cooler 3, and the deoxidized waste water enters a drying and regenerating system after being treated through a deoxidizing liquid separating tank 4.
The drying regeneration module comprises a first drying tower 5, a second drying tower 6, a third drying tower 7, a drying cooler 8 and a drying liquid separating tank 9, wherein the working states of the first drying tower 5, the second drying tower 6 and the third drying tower 7 are adjustable, and the first drying tower 5, the second drying tower 6 and the third drying tower 7 alternately work, regenerate and adsorb to realize the continuity of the work of the whole device, and the pipeline connection is shown in figure 1. The drying cooler 8 and the drying liquid separating tank 9 are connected in series to each other for drying the hydrogen gas, and the specific structures of the first drying tower 5, the second drying tower 6 and the third drying tower 7 are prior art and will not be described in detail here.
The cooling module includes a refrigeration circuit and a cooling circuit. The refrigeration loop comprises a compressor 11, an evaporator 10, an expansion valve 13 and a condenser 12 which are mutually connected in series in sequence, wherein liquid refrigerant evaporates in the evaporator 10, absorbs the heat of cooling water in the cooling loop and changes into a saturated gaseous state; the gaseous refrigerant is compressed by the compressor 11 to form high-temperature high-pressure refrigerant vapor, and then the refrigerant vapor is condensed into a saturated liquid state by releasing heat by the condenser 12; the liquid refrigerant enters the expansion valve 13, and enters the evaporator 10 again for evaporation after throttling, cooling and depressurization, so that refrigeration cycle is realized.
The cooling circuit comprises a main road 17 connected with two ends of the evaporator 10, a first branch 18 and a second branch 18 which are arranged on the main road 17 in parallel, wherein the first branch 18 is connected with the deoxidizing cooler 3, the second branch 18 is connected with the drying cooler 8, and the main road 17 is also provided with a cooling water pump 14 for driving cooling water to flow. The cooling water exchanges heat with the liquid refrigerant in the evaporator 10 to cool, and then enters the first branch 18 and the second branch 18 under the driving action of the cooling water pump 14 to cool and cool the hydrogen in the deoxidizing cooler 3 and the drying cooler 8.
Compared with a closed cooling water system adopting normal-temperature tap water, the cooling system for producing hydrogen, drying and purifying by using electrolyzed water can realize refrigeration circulation, the state of a refrigerant in the condenser 12 and the evaporator 10 is changed, and the refrigerant exchanges heat with cooling water in the evaporator 10, so that the temperature of the cooling water is actively reduced, the first branch 18 and the second branch 18 are respectively connected with the deoxidizing cooler 3 and the drying cooler 8, the cooling water pump 14 drives the cooling water to flow in the first branch 18 and the second branch 18, and therefore, the hydrogen is cooled, and the cooling efficiency can be ensured in high-temperature weather; the first branch 18 and the second branch 18 are connected in parallel and then connected with the main road 17 of the cooling circuit, and a group of cooling circuits simultaneously provide cooling water for the two coolers, so that the integration degree is high, the occupied area is small, and the maintenance cost is reduced; the cooling water is cooled in the evaporator 10, so that the water flow for the cooler can be reduced, a large amount of water resources are saved, and the cooling effect is better.
Preferably, the electric control device further comprises a control unit 19, the electric control valve 15 and the temperature sensor 16 are arranged on the first branch 18 and the second branch 18, the electric control valve 15 and the temperature sensor 16 are in signal connection with the control unit 19, the temperature sensor 16 is used for detecting the temperature of cooling water and transmitting temperature signals to the control unit 19, and the control unit 19 is used for receiving the temperature signals and transmitting action opening signals to the electric control valve 15.
The temperature sensors 16 on the first branch 18 and the second branch 18 can respectively and correspondingly detect the temperature of the cooling water in the first branch 18 and the second branch 18, and transmit temperature signals to the control unit 19, the control unit 19 respectively transmits action opening signals to the electric regulating valves 15 on the first branch 18 and the second branch 18 according to the temperature of the cooling water, and the opening of the electric regulating valves 15 can be controlled, so that the flow of the cooling water passing through the first branch 18 and the second branch 18 is regulated, and the automatic control of the cooling load of the cooling water is realized.
Preferably, the first branch 18 is provided with temperature sensors 16 at both the inlet and the outlet of the deoxygenation cooler 3, and the second branch 18 is provided with temperature sensors 16 at both the inlet and the outlet of the drying cooler 8, each temperature sensor 16 being in signal connection with a control unit 19.
The temperature sensors 16 at the inlet and outlet of the two sets of coolers can respectively detect the inlet water temperature and the outlet water temperature of the cooling water, and respectively transmit the inlet water temperature and the outlet water temperature to the control unit 19, and the control unit 19 controls the opening of the electric regulating valve 15 according to the set value of the outlet water temperature. In this example, the outlet water temperature was assumed to be set to 12 ℃.
Preferably, the electric control valve 15 is a solenoid valve.
The reaction speed of the electromagnetic valve is high, and the opening degree of the valve and the flow rate of the cooling water are accurately controlled.
Preferably, the control unit 19 includes a PLC module 20, a valve actuator 21, a valve opening feedback mechanism 22, and a current transmitter 23, the temperature sensor 16 is in signal connection with the PLC module 20, the valve actuator 21 is used for transmitting an action opening signal to the electric regulating valve 15, the valve opening feedback mechanism 22 is used for detecting the valve opening feedback signal of the valve actuator 21 and transmitting the valve opening feedback signal to the current transmitter 23, and the current transmitter 23 is in signal connection with the PLC module 20 to transmit the valve opening feedback signal to the PLC module 20.
The PLC control module can store and set the outlet water temperature, and calculate the temperature difference, the water flow and the total cooling load. After the two groups of temperature sensors 16 respectively transmit the water inlet temperature and the water outlet temperature to the PLC control module, the PLC control module can calculate the temperature difference, the current opening of the electric regulating valve 15 can be combined to obtain the system water flow, the total cooling load is calculated, and the water inlet temperature set value (assumed to be 7 ℃) is combined to control the output of the refrigerating loop system unit in a linkage way, so that the linkage control of the whole refrigerating loop and the refrigerating loop system is realized.
In this embodiment, the PLC module 20 of the control unit 19 may be an editable controller, and its specific structure is a prior art and will not be described in detail here.
Preferably, the first drying tower 5, the second drying tower 6 and the third drying tower 7 have a first operation state, a second operation state and a third operation state which are cyclically switched to each other;
in the first working state, the first drying tower 5 is used for hydrogen drying, the second drying tower 6 is used for hydrogen regeneration, and the third drying tower 7 is used for hydrogen adsorption;
in the second working state, the second drying tower 6 is used for hydrogen drying, the third drying tower 7 is used for hydrogen regeneration, and the first drying tower 5 is used for hydrogen adsorption;
in the third operating state, the third drying tower 7 is used for hydrogen drying, the first drying tower 5 is used for hydrogen regeneration, and the second drying tower 6 is used for hydrogen adsorption.
In one switching cycle, each drying tower experiences three conditions, and the operating conditions of the drying towers change according to the order of entering drying towers. For each working state, the first drying tower which is fed with raw material crude hydrogen after passing through the deoxidizing module is a drying tower in a drying state, the second drying tower is a drying tower in a regeneration state, and the third drying tower is a drying tower in an adsorption state.
In the first working state, the three drying towers into which the raw material crude hydrogen enters are sequentially a first drying tower 5, a second drying tower 6 and a third drying tower 7; in the second working state, the sequence of the three drying towers into which raw material crude hydrogen enters is a second drying tower 6, a third drying tower 7 and a first drying tower 5 in sequence; in the third working state, the order of the three drying towers into which the raw material crude hydrogen enters is a third drying tower 7, a first drying tower 5 and a second drying tower 6 in sequence.
The drying tower in a drying state has a full gas treatment amount, a heater in the drying tower does not work, and the medium is raw material hydrogen which is not dehydrated; the drying tower in the regeneration state is characterized in that the treatment gas quantity is determined according to debugging, and the treatment gas quantity is possibly full gas quantity and possibly partial gas quantity; the gas treatment amount of the drying tower in the adsorption state is the same as that of the drying tower in the regeneration state, a heater in the drying tower does not work, and the medium is hydrogen for regeneration.
Specifically, the regeneration state comprises a heating stage and a cooling stage, wherein in the heating stage, a heater in the drying tower works, and when the upper temperature reaches a linkage value or the heating time reaches a set value, the heating is automatically stopped; under the cooling stage, after the drying tower stops heating, the air flow continuously flows through the drying tower according to the original path so as to cool the drying tower until the drying tower is switched to a working state; the medium is dehydrated dry hydrogen when the drying tower is in a regeneration state.
The following describes the operation of the drying tower, taking the first operation state as an example:
the hydrogen processed by the deoxidizing module enters through the lower interface of the first drying tower 5, saturated vapor contained in the hydrogen in the container is adsorbed by the desiccant, the dried hydrogen flows out from the upper outlet of the first drying tower 5, and is divided into two paths after passing through the pneumatic three-way ball valve, one path flows to the second drying tower 6, and the other path enters into a product gas pipeline; the gas distribution of the two paths is regulated by a stop valve, the stop valve is in a closed state in general, all gas flows to the second drying tower 6, when the heating linkage time of the second drying tower 6 in a regeneration state exceeds 3 hours, and an electric heating element is intact, the opening of the stop valve can be properly regulated, so that the heating linkage time is less than 3 hours;
the high-purity dry hydrogen flowing out of the first drying tower 5 enters the second drying tower 6 from the upper port of the second drying tower 6 through a pneumatic three-way ball valve, a heater element in the second drying tower 6 is automatically started, the hydrogen is heated by an electric heater and flows through a drying agent bed layer, moisture adsorbed on the drying agent is contacted with the hot hydrogen, and is desorbed from the drying agent in a water vapor form, and flows out together with the hydrogen through the lower port of the second drying tower 6;
the hotter mixed gas of hydrogen and water vapor enters a drying cooler 8, the hydrogen and the water vapor carried by the hydrogen are cooled, condensed water flows into a drying liquid separating tank 9 along with the hydrogen and then is separated from the hydrogen, and the condensed water is periodically and automatically discharged out of the system through a drain valve;
the cooled hydrogen enters through the lower interface of the third drying tower 7, saturated vapor contained in the hydrogen is adsorbed by a drying agent, the dried hydrogen flows out through the upper interface of the third drying tower 7, and finally qualified product hydrogen flows out of the purification device;
in the first state, when the linkage temperature of the second drying tower 6 reaches a set temperature value or the heating duration reaches a set time value, the electric heating element is powered off, the hydrogen is not heated any more, and the second drying tower 6 enters a cooling stage.
When the total operation time of the first state reaches 6 hours, the regeneration of the second drying tower 6 is finished; the first drying tower 5, the second drying tower 6 and the third drying tower 7 are automatically switched to a second state under the control of a program; the second state and the third state operate in the same manner as the first state, and are not described in detail herein.
Preferably, the condenser 12 is an air cooled condenser.
The air-cooled condenser has a mature structure and is convenient to use and maintain.
In summary, the embodiment of the utility model provides a cooling system for producing hydrogen, drying and purifying by electrolyzed water, which is compared with a closed cooling water system adopting normal-temperature tap water, the refrigerating loop of a cooling module can realize refrigeration circulation, a refrigerant generates state change in a condenser and an evaporator and exchanges heat with cooling water in the evaporator, so that the temperature of the cooling water is actively reduced, a first branch and a second branch are respectively connected with a deoxidizing cooler and a drying cooler, the cooling water pump drives the cooling water to flow in the first branch and the second branch, thereby cooling hydrogen and ensuring cooling efficiency in high-temperature weather; the first branch and the second branch are connected in parallel and then connected with the main circuit of the cooling loop, and a group of cooling loops simultaneously provide cooling water for the two coolers, so that the integration degree is high, the occupied area is small, and the maintenance cost is reduced; the cooling water is cooled in the evaporator, so that the water flow for the cooler can be reduced, a large amount of water resources are saved, and the cooling effect is better.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.
Claims (7)
1. The system is characterized by comprising a deoxidization module, a drying regeneration module and a cooling module;
the deoxidizing module comprises a raw gas liquid separating tank, a deoxidizing tower, a deoxidizing cooler and a deoxidizing liquid separating tank which are sequentially connected in series through pipelines, wherein the raw gas liquid separating tank is used for receiving crude hydrogen input from the outside, and the deoxidizing liquid separating tank is used for being connected with the drying and regenerating module;
the drying regeneration module comprises a first drying tower, a second drying tower and a third drying tower with adjustable working states, a drying cooler for drying hydrogen and a drying liquid separating tank, wherein the drying cooler and the drying liquid separating tank are connected in series;
the cooling module comprises a refrigerating loop and a cooling loop, the refrigerating loop comprises a compressor, an evaporator, an expansion valve and a condenser which are mutually and sequentially connected in series, the cooling loop comprises a main path connected with two ends of the evaporator, a first branch connected with the deoxidizing cooler and a second branch connected with the drying cooler are arranged on the main path in parallel, and a cooling water pump for driving cooling water to flow is further arranged on the main path.
2. The system according to claim 1, further comprising a control unit, wherein the first branch and the second branch are respectively provided with an electric control valve and a temperature sensor, the electric control valves and the temperature sensors are respectively connected with the control unit in a signal manner, the temperature sensors are respectively used for detecting the temperature of the cooling water and transmitting temperature signals to the control unit, and the control unit is used for receiving the temperature signals and transmitting action opening signals to the electric control valves.
3. The dry purification cooling system for producing hydrogen from electrolyzed water according to claim 2, wherein the first branch is provided with the temperature sensor at the inlet and the outlet of the deoxidizing cooler, the second branch is provided with the temperature sensor at the inlet and the outlet of the drying cooler, and each temperature sensor is in signal connection with the control unit.
4. The dry purification cooling system for producing hydrogen from electrolyzed water according to claim 2 wherein the electrically operated control valve is a solenoid valve.
5. The electrolytic water hydrogen production drying purification cooling system according to claim 3, wherein the control unit comprises a PLC module, a valve actuator, a valve opening feedback mechanism and a current transmitter, the temperature sensor is in signal connection with the PLC module, the valve actuator is used for transmitting an action opening signal to the electric regulating valve, the valve opening feedback mechanism is used for detecting a valve opening feedback signal of the valve actuator and transmitting the valve opening feedback signal to the current transmitter, and the current transmitter is in signal connection with the PLC module so as to transmit the valve opening feedback signal to the PLC module.
6. The electrolytic water hydrogen production drying purification cooling system according to any one of claims 1 to 5, wherein the first drying tower, the second drying tower, and the third drying tower have a first operation state, a second operation state, and a third operation state that are cyclically switched to each other;
in the first working state, the first drying tower is used for hydrogen drying, the second drying tower is used for hydrogen regeneration, and the third drying tower is used for hydrogen adsorption;
in a second working state, the second drying tower is used for hydrogen drying, the third drying tower is used for hydrogen regeneration, and the first drying tower is used for hydrogen adsorption;
in the third working state, the third drying tower is used for hydrogen drying, the first drying tower is used for hydrogen regeneration, and the second drying tower is used for hydrogen adsorption.
7. The dry purification cooling system for producing hydrogen from electrolyzed water according to any one of claims 1 to 5 wherein the condenser is an air cooled condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321672573.XU CN220294409U (en) | 2023-06-29 | 2023-06-29 | Water electrolysis hydrogen production drying purification cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321672573.XU CN220294409U (en) | 2023-06-29 | 2023-06-29 | Water electrolysis hydrogen production drying purification cooling system |
Publications (1)
| Publication Number | Publication Date |
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| CN220294409U true CN220294409U (en) | 2024-01-05 |
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