CN115747853A - Multiple circulating cooling system of small hydrogen production equipment - Google Patents
Multiple circulating cooling system of small hydrogen production equipment Download PDFInfo
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- CN115747853A CN115747853A CN202211457023.6A CN202211457023A CN115747853A CN 115747853 A CN115747853 A CN 115747853A CN 202211457023 A CN202211457023 A CN 202211457023A CN 115747853 A CN115747853 A CN 115747853A
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- 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
Abstract
The invention discloses a multiple circulation cooling system applied to small hydrogen production equipment, which comprises a pure water tank, a heat exchanger connected with a circulation pipeline of the pure water tank, an electrolytic tank respectively connected with the heat exchanger and the pure water tank through pipelines, and a steam-water separation device connected with the electrolytic tank through a pipeline; the heat exchanger is provided with two water input pipelines, wherein one pipeline is connected with an external cooling water input port, and the other pipeline is connected with the pure water tank; one end of the pure water tank is used for respectively inputting cooling water to the electrolytic cell and the steam-water separation device through the heat exchanger, and the other end of the pure water tank is used for inputting cooling water and oxygen electrolyzed by the electrolytic cell; the electrolytic cell inputs oxygen to the pure water tank after electrolyzing water, and inputs hydrogen to the steam-water separation device. The invention can simultaneously carry out multiple circulating cooling and recycling on the pure water tank, the electrolytic bath and the water-vapor separation device, and has simple structure, controllable temperature and lower cost.
Description
Technical Field
The invention relates to the technical field of hydrogen production equipment, in particular to a multiple circulation cooling system of small hydrogen production equipment.
Background
In the existing hydrogen production equipment, a constant current source is provided for the operation of an electrolytic cell, the electrolytic cell can generate heat during the operation, excessive heat consumes excessive power, and the working efficiency of the electrolytic cell is influenced by overhigh temperature, so that the service life of the electrolytic cell is shortened; in addition, hydrogen generated by electrolyzing water contains a large amount of water vapor, and cooling water is also needed for cooling and separating the water vapor and the hydrogen, so that a whole set of controllable circulating cooling water system is very necessary.
Accordingly, the prior art is deficient and needs improvement.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the multiple circulation cooling system of the small hydrogen production equipment can simultaneously carry out multiple circulation cooling and circulation use on a pure water tank, an electrolytic bath and a water-vapor separation device, and has the advantages of simple structure, controllable temperature and lower cost.
The technical scheme of the invention is as follows: a multi-circulation cooling system applied to small hydrogen production equipment comprises a pure water tank, a heat exchanger connected with a circulation pipeline of the pure water tank, an electrolytic tank respectively connected with the heat exchanger and the pure water tank through pipelines, and a steam-water separation device connected with the electrolytic tank through a pipeline; the heat exchanger is provided with two water input pipelines, wherein one pipeline is connected with a cooling water input port, and the other pipeline is connected with the pure water tank; one end of the pure water tank is used for respectively inputting cooling water to the electrolytic cell and the steam-water separation device through the heat exchanger, and the other end of the pure water tank is used for inputting cooling water and oxygen electrolyzed by the electrolytic cell; the electrolytic cell inputs oxygen into the pure water tank after electrolyzing water, and inputs hydrogen into the steam-water separation device.
The cooling water inlet is directly connected with the steam-water separation device.
The multi-circulation cooling system applied to the small hydrogen production equipment is also provided with a cooling water outlet, and the cooling water outlet is respectively connected with the steam-water separation device and the heat exchanger.
The multi-circulation cooling system applied to the small hydrogen production equipment is characterized in that pressure sensors are respectively arranged between the heat exchanger and the pure water tank, between the heat exchanger and the electrolytic bath and between the heat exchanger and the steam-water separation device.
The multi-circulation cooling system applied to the small hydrogen production equipment is further provided with a water drainage pipeline, the water drainage pipeline is respectively connected with the pure water tank, the heat exchanger and the steam-water separation device, and a water seal is further arranged between the steam-water separation device and the water drainage pipeline.
The pure water tank is directly connected with the water seal.
The multi-circulation cooling system applied to the small hydrogen production equipment is also provided with a water supplementing input port directly connected with the pure water tank.
In the multi-cycle cooling system applied to the small hydrogen production equipment, a jet pump is also arranged between the pure water tank and the heat exchanger in the direction that the water in the pure water tank flows to the heat exchanger; and the water flow of the heat exchanger circulates back to the pure water tank, and a filter cylinder is arranged between the heat exchanger and the pure water tank.
Be applied to above-mentioned each technical scheme, be applied to among the multiple circulating cooling system of small-size hydrogen manufacturing equipment, install level sensor and temperature sensor in the pure water case, level sensor is used for detecting the liquid level data of pure water incasement water, temperature sensor is used for detecting the temperature data of pure water incasement water.
The steam-water separation device comprises an upper cooling cavity and a lower water level cavity; the upper cooling cavity is provided with a steam-water separation cooling water inlet and a steam-water separation cooling water outlet, the lower water level cavity is provided with a water level and a drainage outlet, and a hydrogen input port is arranged between the upper cooling cavity and the lower water level cavity.
The invention has the beneficial effects that:
the invention can respectively carry out multi-cycle cooling on the pure water tank, the electrolytic bath and the water-vapor separation device by arranging the multi-path waterway pipelines, the cooling water can be recycled, the use requirements of each part structure on the cooling water can be met, and the invention has the advantages of simple structure and lower use cost.
Drawings
FIG. 1 is a schematic view of a connection structure according to the present invention;
FIG. 2 is a mechanical schematic of the present invention;
FIG. 3 is a schematic structural view of the water-vapor separation device according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
This embodiment provides a multi-cycle cooling system applied to a small-sized hydrogen production apparatus, which comprises a pure water tank 101, a heat exchanger 105 connected to a circulation pipe of the pure water tank 101, an electrolytic bath 103 connected to the heat exchanger 105 and the pure water tank 101 through pipes, respectively, and a steam-water separation device 102 connected to the electrolytic bath 103 through a pipe, as shown in fig. 1 and 2.
As shown in fig. 1, the heat exchanger is provided with two water input pipelines, one of which is connected with the cooling water input port, and the other of which is connected with the pure water tank, so that the deionized water in the pure water tank can be cooled by inputting cooling water; the heat exchanger has the functions of cooling input water in a heat exchange mode, ensuring low-temperature constant-temperature supply of the cooling water, adjusting the temperature of output cooling water by adjusting the working efficiency of the heat exchanger, and realizing the specific structure and the adjusting mode of the heat exchanger by the prior art.
One end of the pure water tank is used for respectively inputting cooling water to the electrolytic bath and the steam-water separation device through the heat exchanger, and the other end of the pure water tank is used for inputting cooling water and oxygen electrolyzed by the electrolytic bath; and the electrolytic cell inputs oxygen into the pure water tank after electrolyzing water, and inputs hydrogen into the steam-water separation device, namely, after the water in the pure water tank passes through the heat exchanger, cooling water with set temperature is output to the electrolytic cell, after the water is electrolyzed by the electrolytic cell, two poles of the electrolytic cell respectively generate hydrogen and oxygen, and both the hydrogen and the oxygen carry a large amount of water vapor, so that the hydrogen can be input into the steam-water separation device for steam-water separation, the hydrogen is collected after purification, and the oxygen with the water vapor is conveyed back into the pure water tank, and the oxygen is recovered by installing an oxygen extraction fan connected with the pure water tank.
The flow control valve is arranged between the heat exchanger and the cooling water input pipeline of the steam-water separation device, and the flow control valve can control whether the cooling water of the heat exchanger flows into the steam-water separation device or not, so that the cooling water in the heat exchanger is preferentially input into the electrolytic cell, and after the use of the electrolytic cell is met, the flow control valve is used for controlling the flow control valve.
The steam-water separation device preferentially uses the cooling water inlet to input external cooling water, so that the circulating fluidity of the cooling water is ensured, and the separation effect of the steam-water separation device is ensured; and, the inflow and outflow speed of the cooling water of the heat exchanger can be controlled by increasing the pressure through the flow control valve, thereby adjusting the working efficiency of the heat exchanger.
And the pure water tank is internally provided with a liquid level sensor and a temperature sensor, the liquid level sensor is used for detecting the liquid level data of the water in the pure water tank, and the temperature sensor is used for detecting the temperature data of the water in the pure water tank. Wherein, can come automatically regulated heat exchanger work efficiency through the temperature sensor detects the temperature in the pure water tank to, through detecting the water tank water level, when the water tank water level reachd the low level, send the signal of telecommunication and instruct the water tank to mend the mouth of a river and open automatically, when the water tank water level reachd the high level, instruct the water tank to mend the mouth of a river self-closing.
A jet pump 104 is provided between the deionized water tank and the heat exchanger in the direction in which the water in the deionized water tank flows into the heat exchanger; and the water flow of the heat exchanger circulates back to the direction of the pure water tank, a filtering cylinder 107 is arranged between the heat exchanger and the pure water tank, wherein the number of the filtering cylinders 107 is two, the filtering cylinders are a filtering sand cylinder and a ceramic filtering cylinder, the filtering sand cylinder and the ceramic filtering cylinder can respectively filter different impurities, and the filtering effect is better.
Wherein, the electrolysis bath can have impurity to separate out when working, can influence the quality of water in the pure water case like this, so just need filter the water in the pure water case thereby guarantee that the water storage in the pure water case keeps sufficient purity all the time. Thus, the water in the pure water tank is pushed out in a high-pressure state by the jet pump, which contributes to smooth circulation of the water in the electrolytic bath. The water is divided into two parts after passing through the heat exchanger, one part is supplied to the electrolytic bath, and the other part passes through the filtering cylinder; after water passes through the filter cylinder, the water pressure is influenced, which is also the reason that only one path of water which passes through the filter cylinder and then passes through the electrolytic bath is not selected after the water passes through the heat exchanger; therefore, two paths of water are selected, so that the normal operation of the electrolytic cell is ensured, and the water in the water tank is filtered.
The external cooling water input port is also directly connected with the steam-water separation device; that is, the steam-water separation device can provide cooling water through the water of the pure water tank through the heat exchanger, and can also directly provide the cooling water through the external cooling water input port, and the setting can be specifically carried out according to the application scene.
In addition, a cooling water outlet can be arranged and is respectively connected with the steam-water separation device and the heat exchanger; the steam-water separation device and the heat exchanger can output cooling water through the cooling water outlet, so that the cooling water in the steam-water separation device can be discharged, the cooling water circulation is accelerated, and the using effect of the steam-water separation device is ensured.
Pressure sensors are respectively arranged between the heat exchanger and the pure water tank, between the heat exchanger and the electrolytic bath and between the heat exchanger and the steam-water separation device; the pressure sensor is used for collecting the water flow pressure of the heat exchanger flowing to the pure water tank, the electrolytic cell and the steam-water separation device respectively, so that the water flow can be controlled within a normal pressure range, the safety performance of the equipment is ensured, and the service life of the equipment is prolonged.
The temperature sensor is also arranged in the electrolytic cell and used for detecting the temperature in the electrolytic cell, and the abnormal operation of the electrolytic cell is prevented through the detection of the temperature of the electrolytic cell; the electrolytic bath works to provide a constant current source, and the abnormal working of the electrolytic bath indicates that the voltage of the electrolytic bath is too high, the heat generated in the working process is too large, the working efficiency of the electrolytic bath is influenced by too high temperature besides consuming redundant power consumption, and the working life of the electrolytic bath is shortened; thus, by detecting the temperature, measures can be taken in time to lower the temperature in the electrolytic cell, for example, to increase the flow of cooling water.
The water-saving device is characterized by also comprising a water drainage pipeline, wherein the water drainage pipeline is respectively connected with the pure water tank, the heat exchanger and the steam-water separation device, a water drainage valve is arranged at a water drainage output port of the water drainage pipeline, a manual valve is arranged between the water drainage pipeline and the pure water tank, and water in the water drainage pipeline can be input into the heat exchanger through the water drainage pipeline, so that the water in the water drainage pipeline can be reused; a water seal 106 is arranged between the steam-water separation device and the water discharge pipe; the pure water tank is also directly connected with the water seal 106; the water sealed by the water seal can also be recycled by flowing back to the pure water tank; and, the water seal also is connected with drainage pipe, through manual three-way valve connection between water seal and drainage pipe, the pure water case, so, water in the water seal can flow into the pure water case through control, also can flow to heat exchanger through drainage pipe, perhaps, also can discharge the outside through drainage pipe, and similarly, water in the pure water case also can flow to heat exchanger through drainage pipe, also can discharge the outside through drainage pipe, specifically can set up according to application scene and in-service use demand.
As shown in fig. 3, the steam-water separating device includes an upper cooling chamber and a lower water level chamber; the upper cooling cavity is provided with a steam-water separation cooling water inlet and a steam-water separation cooling water outlet, the lower water level cavity is provided with a water level and a drainage outlet, a hydrogen input port is arranged between the upper cooling cavity and the lower water level cavity, and the drainage outlet is connected with a water seal.
Wherein, the water in the upper portion cooling chamber is cooling water, can reduce the pipe wall temperature, and when hydrogen passed through intraductally, the vapor in the hydrogen can produce the condensation effect to can reject the partial steam that contains in the hydrogen.
And a floating ball liquid level switch is arranged in the lower water level cavity, and the floating ball liquid level switch drains water by adjusting the air pressure in the cavity when the water level reaches a certain height through detecting the water level.
The installation position of the water seal in the whole system is relatively high, water filtered by the steam-water separator is temporarily stored in the water seal, and then the water is discharged back to the pure water tank from the water seal to play a role in buffering, so that the hydrogen and oxygen are prevented from being in the same room, and the safety is necessary; in addition, in the electrolytic process of the electrolytic cell, part of water permeates the SPE membrane and comes out along with the hydrogen, and if the part of water is not recycled, the water consumed by electrolysis is huge; therefore, the water sealed by the water seal is circulated back to the pure water tank, so that the consumption of the water can be reduced, and the effect of saving the cost is achieved.
And the water discharged from the steam-water separation device is at a low position in the whole system, if the water in the steam-water separation device is to be discharged, the air pressure in the cavity needs to be increased, and the filtered water in the steam-water separation device is discharged by using the air pressure difference. The risk that partial hydrogen is pressurized to the connecting container when the water is drained by pressure difference, if the steam-water separation device is directly connected with the pure water tank, hydrogen flows into the pure water tank when the steam-water separation device drains water, because oxygen circulates along with water, the water tank contains a large amount of oxygen, and the hydrogen-oxygen phase part has explosion risk. In order to avoid this risk, a buffer vessel is added in the middle, which is the function of a water seal.
In addition, each temperature sensor, liquid level sensor, pressure sensor, drain valve, flow control valve, etc. of the present invention are connected to an external control system, and the control system can process each temperature data, liquid level data and pressure data, and can control the automatic opening and closing of various valves and switches by control, and the specific composition, connection structure, configuration software, etc. of the control system can be realized by the prior art, and the details are not repeated here.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A multi-circulation cooling system applied to small hydrogen production equipment is characterized by comprising a pure water tank, a heat exchanger connected with a circulation pipeline of the pure water tank, an electrolytic tank respectively connected with the heat exchanger and the pure water tank through pipelines, and a steam-water separation device connected with the electrolytic tank through a pipeline;
the heat exchanger is provided with two water input pipelines, wherein one pipeline is connected with a cooling water input port, and the other pipeline is connected with the pure water tank; one end of the pure water tank is used for respectively inputting cooling water to the electrolytic cell and the steam-water separation device through the heat exchanger, and the other end of the pure water tank is used for inputting cooling water and oxygen electrolyzed by the electrolytic cell;
the electrolytic cell inputs oxygen into the pure water tank after electrolyzing water, and inputs hydrogen into the steam-water separation device.
2. The multiple-cycle cooling system for use in a small scale hydrogen plant according to claim 1, wherein: the cooling water input port is also directly connected with the steam-water separation device.
3. The multiple-cycle cooling system for use in a small scale hydrogen plant of claim 2, wherein: and a cooling water outlet is also arranged and is respectively connected with the steam-water separation device and the heat exchanger.
4. The multiple-cycle cooling system for use in a small scale hydrogen plant according to claim 3, wherein: pressure sensors are respectively arranged between the heat exchanger and the pure water tank, between the heat exchanger and the electrolytic bath and between the heat exchanger and the steam-water separation device.
5. The multiple-cycle cooling system for use in a small scale hydrogen plant of claim 1, wherein: still set up a drainage pipe, drainage pipe is connected with pure water case, heat exchanger, catch water respectively, and, still be provided with a water seal between catch water and the drain pipe.
6. The multiple-cycle cooling system for use in a small scale hydrogen plant according to claim 5, wherein: the pure water tank is also directly connected with the water seal.
7. The multiple-cycle cooling system for use in a small scale hydrogen plant according to claim 1, wherein: and a water supplementing input port directly connected with the pure water tank is also arranged.
8. The multiple-cycle cooling system for use in a small scale hydrogen plant according to claim 1, wherein: a jet pump is arranged between the pure water tank and the heat exchanger in the direction that the water in the pure water tank flows to the heat exchanger; and the water flow of the heat exchanger circulates back to the pure water tank, and a filter cylinder is arranged between the heat exchanger and the pure water tank.
9. The multiple-cycle cooling system for use in a small scale hydrogen plant according to claim 1, wherein: the water purification device is characterized in that a liquid level sensor and a temperature sensor are installed in the water purification box, the liquid level sensor is used for detecting liquid level data of water in the water purification box, and the temperature sensor is used for detecting temperature data of the water in the water purification box.
10. The multiple-cycle cooling system for use in a small scale hydrogen plant according to claim 1, wherein: the steam-water separation device comprises an upper cooling cavity and a lower water level cavity; the upper cooling cavity is provided with a steam-water separation cooling water inlet and a steam-water separation cooling water outlet, the lower water level cavity is provided with a water level and a drainage outlet, and a hydrogen input port is arranged between the upper cooling cavity and the lower water level cavity.
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| CN202211457023.6A CN115747853A (en) | 2022-11-21 | 2022-11-21 | Multiple circulating cooling system of small hydrogen production equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211457023.6A CN115747853A (en) | 2022-11-21 | 2022-11-21 | Multiple circulating cooling system of small hydrogen production equipment |
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| CN115747853A true CN115747853A (en) | 2023-03-07 |
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