CN218596533U - Hydrogen production system for producing hydrogen by electrolyzing alkaline water - Google Patents
Hydrogen production system for producing hydrogen by electrolyzing alkaline water Download PDFInfo
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- CN218596533U CN218596533U CN202222290026.7U CN202222290026U CN218596533U CN 218596533 U CN218596533 U CN 218596533U CN 202222290026 U CN202222290026 U CN 202222290026U CN 218596533 U CN218596533 U CN 218596533U
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Abstract
The utility model discloses a hydrogen production system for producing hydrogen by electrolyzing alkaline water, which comprises a hydrogen production system, a gas-liquid separation system, a water and alkali adding system and a power supply, distribution and control system; the hydrogen preparation system is connected with the gas-liquid separation system, and the gas-liquid separation system is connected with the water and alkali adding system; an anolyte circulating tank is arranged at a liquid outlet of the anolyte gas-liquid separator, the anolyte circulating tank is connected with an electrolytic tank through a pump body, an anolyte filter and an anolyte cooler are arranged at a connecting pipeline of the anolyte circulating tank and the electrolytic tank, a catholyte circulating tank is arranged at a liquid outlet of the catholyte gas-liquid separator, the catholyte circulating tank is connected with the electrolytic tank through the pump body, and a catholyte filter and a catholyte cooler are arranged at a connecting pipeline of the catholyte circulating tank and the electrolytic tank; the hydrogen production system has high automation degree and good safety performance, and can realize unattended operation and remote control on site; the method adopts normal pressure operation, so that the method is suitable for producing hydrogen by utilizing renewable energy.
Description
Technical Field
The utility model belongs to the technical field of hydrogen production, in particular to a hydrogen production system for producing hydrogen by electrolyzing alkaline water.
Background
Water electrolysis hydrogen production is one of the widely applied and mature methods at present. The process of producing hydrogen by using water as raw material is the reverse process of producing water by burning hydrogen and oxygen, so that water can be decomposed by providing a certain form of energy. The efficiency of hydrogen gas production by water decomposition by supplying electric energy is generally 75-85%, the process is simple and pollution-free, but the electricity consumption is large, so the application is limited. The method for producing hydrogen by electrolyzing water by using the peak-valley difference of the power grid also has the characteristics as an energy storage means. China has rich hydraulic resources, and the water electrolysis hydrogen production has development prospects by utilizing hydroelectric power to generate electricity. Solar energy is inexhaustible, and a method for producing hydrogen by utilizing photoelectricity is called a solar hydrogen energy system, and experimental research is carried out abroad. With the improvement of the conversion efficiency of the solar cell, the reduction of the cost and the extension of the service life, the prospect of the solar cell for hydrogen production is immeasurable. Meanwhile, solar energy, wind energy, ocean energy and the like can also be used for preparing hydrogen through electricity and using hydrogen as an intermediate energy carrier for regulation, and the hydrogen is stored and converted into energy, so that the energy supply to users is more flexible and convenient. The surplus electric energy of the power supply system in the valley can also be used for electrolyzing water to produce hydrogen, so that the purpose of storing energy is achieved. The water electrolysis hydrogen production devices of various scales in China are hundreds, but are small-sized electrolysis hydrogen production devices, and the purpose of the devices is to produce and extract hydrogen as a seasoning instead of as an energy source. With the gradual expansion of hydrogen energy application, a water electrolysis hydrogen production method is certainly developed.
In the prior art, the device has the problems of large volume, heavy weight, inconvenient operation, low safety performance, inconvenient maintenance and disassembly in the production process due to the on-site assembly of the electrolytic cell, poor adaptability to the change of power supply load and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems of the prior art and provide a hydrogen production system for producing hydrogen by electrolyzing alkaline water.
The purpose of the utility model can be realized by the following technical scheme:
a hydrogen production system for producing hydrogen by electrolyzing alkaline water comprises a hydrogen production system, a gas-liquid separation system, a water and alkali adding system and a power supply, distribution and control system; the hydrogen preparation system is connected with the gas-liquid separation system, the gas-liquid separation system is connected with the water and alkali adding system, and the power supply and distribution and control system is respectively connected with the hydrogen preparation system, the gas-liquid separation system and the water and alkali adding system through electric wires;
the hydrogen preparation system comprises an electrolytic cell, and water in the electrolytic cell is decomposed into hydrogen and oxygen under the action of current;
the gas-liquid separation system comprises a hydrogen-oxygen separator, an alkali liquor filter, an alkali liquor cooler and an oxygen-hydrogen cooler; the electrolytic bath of the hydrogen preparation system is respectively connected with the hydrogen separator and the oxygen separator;
the gas outlet of the anode liquid-gas separator is provided with an oxygen cooler and conveys oxygen to a user through oxygen cooling, and the gas outlet of the cathode liquid-gas separator is provided with a hydrogen cooler and conveys hydrogen to the user through the hydrogen cooler;
an anolyte circulating tank is arranged at a liquid outlet of the anolyte gas-liquid separator, the anolyte circulating tank is connected with an electrolytic tank through a pump body, an anolyte filter and an anolyte cooler are arranged at a connecting pipeline of the anolyte circulating tank and the electrolytic tank, a catholyte circulating tank is arranged at a liquid outlet of the catholyte gas-liquid separator, the catholyte circulating tank is connected with the electrolytic tank through the pump body, and a catholyte filter and a catholyte cooler are arranged at a connecting pipeline of the catholyte circulating tank and the electrolytic tank;
the water and alkali adding system comprises a water adding pump, an alkali preparing pump, a raw material water tank and an alkali liquid tank, wherein the alkali liquid tank is respectively connected with the anode liquid circulating tank and the cathode liquid circulating tank through the alkali preparing pump, and the raw material water tank is connected with the electrolytic bath through the water adding pump.
As a further aspect of the present invention: the working process of the gas-liquid separation system is as follows:
hydrogen, oxygen and KOH solution which are conveyed by the hydrogen preparation device are separated in a hydrogen-oxygen separator, and the separated hydrogen and oxygen are cooled by a cooler and automatically emptied after drip catching by a drip catcher;
the separated alkali liquor enters a circulating tank and returns to the electrolytic tank again for electrolysis under the action of a pump;
part of electric energy can be converted into heat energy in the electrolysis process, so that the temperature of the electrolytic cell is continuously raised, and the temperature of the alkali liquor at the outlet of the electrolytic cell is controlled by adjusting the flow rate of the cooling water of the alkali liquor cooler.
As a further aspect of the present invention: the working process of the water and alkali adding system is as follows:
when preparing the alkali liquor, starting an alkali preparation pump, circulating water in an alkali liquor box under the action of the pump, gradually adding solid KOH or concentrated alkali into the alkali liquor box until the specific gravity of the alkali liquor reaches a set value, and controlling the concentration of KOH solution to be 25-35%, so that the potassium hydroxide solution is prepared;
when the prepared alkali liquor is injected into the hydrogen production system, an alkali preparation pump still needs to be used; along with the operation of the system, the pure water in the hydrogen production system is continuously consumed, the pure water in the system needs to be supplemented at any time, and the action is realized by a water supplementing pump; the outlet pressure of the water replenishing pump is larger than the operating pressure of the system, and water is replenished into the hydrogen production system under the condition that the hydrogen production system normally operates.
As a further aspect of the present invention: the electrolytic cell comprises a cell group;
the electrolytic cell group comprises an anode end frame electrolytic cell, a middle frame electrolytic cell and a cathode end frame electrolytic cell;
a plurality of middle frame electrolytic tanks are arranged between the anode end frame electrolytic tank and the cathode end frame electrolytic tank side by side, two sealing gaskets are arranged between the sealing surfaces of the anode end frame electrolytic tank and the middle frame electrolytic tank, between the sealing surfaces of the middle frame electrolytic tank and between the sealing surfaces of the middle frame electrolytic tank and the cathode end frame electrolytic tank, an ion permeable membrane is arranged between the two sealing gaskets, a fixed frame is arranged at one side of the anode end frame electrolytic tank far away from the middle frame electrolytic tank, a fixed frame is arranged at one side of the cathode end frame electrolytic tank far away from the middle frame electrolytic tank, insulating plates are arranged between the anode end frame electrolytic tank and the fixed frame and between the cathode end frame electrolytic tank and the fixed frame, and the two fixed frames are connected through a locking groove screw;
the anode end frame electric tank and the cathode end frame electric tank are connected with a direct current power supply through a plurality of cables to form a loop;
the feeding main pipe and the discharging main pipe are connected with the cathode and anode connecting pipes of each unit cell through hoses.
As a further aspect of the present invention: the electrolytic tank is assembled by adopting a filter press type oil cylinder pressure groove locking mode and comprises an oil cylinder, a front fixed seat, a movable seat, a rear fixed seat and a side lever;
the front fixing seat, the rear fixing seat and the side lever enclose a rectangular frame structure, one side of the front fixing seat is provided with an oil cylinder, the output end of the oil cylinder is connected with the movable seat, the anode end frame electrolytic tank is arranged on the movable seat, and the cathode end frame electrolytic tank is arranged on the rear fixing seat.
As a further aspect of the present invention: the electrolytic cell is assembled by adopting a filter press type oil cylinder pressure groove locking mode, and further comprises a middle seat arranged between the front fixed seat and the rear fixed seat, and side rods are respectively arranged on the front fixed seat, the front side and the rear side of the middle seat, and the front side and the rear side of the rear fixed seat and the front side and the rear side of the middle seat;
one side of the front fixed seat and one side of the rear fixed seat are respectively provided with an oil cylinder, the output end of the oil cylinder is connected with the movable seat, the anode end frame electrolytic tank is arranged on the movable seat, and the two sides of the middle seat are respectively provided with a cathode end frame electrolytic tank.
As a further aspect of the present invention: the electrolytic tank is a multi-pole type electrolytic tank, and a group of electrolytic tanks is composed of an anode end frame electrolytic tank, a plurality of middle frame electrolytic tanks and a cathode end frame electrolytic tank; the middle frame electrolytic tank consists of a frame, an anode part and a cathode part.
As a further aspect of the present invention: the frame is formed by welding or bolt connection of steel or rectangular pipes with rectangular root sections.
As a further aspect of the present invention: the anode part consists of an anode disc, an anode rib plate and an anode electrode, and the materials except the anode electrode are all made of pure nickel or s stainless steel.
As a further aspect of the present invention: the cathode part comprises a cathode disc, a cathode elastomer structure and a cathode electrode; the cathode disc is made of pure nickel or 310S stainless steel, and the cathode elastomer structure is composed of cathode rib plates, a cathode bottom net and an elastic layer or is an elastomer directly made of a thin nickel plate.
Compared with the prior art, the beneficial effects of the utility model are that:
the novel process for producing hydrogen by electrolyzing alkaline water is a membrane electrode electrolytic tank with the area of 0.66-3.5m2, which is used for electrolyzing alkaline water, greatly reduces the power consumption of hydrogen, greatly reduces the cost of producing hydrogen by the whole alkaline water, and improves the hydrogen production of a single set of device; by adopting the bipolar groove film polar distance technology, the operating current density is high, and the range is wide (1000-12000A/m) 2 ) (ii) a The operation pressure of the electric tank is 5-50kPa, which is beneficial to the long-term maintenance of the service life of the electric tank and the membrane; the electric tank has compact structure, small occupied area and convenient and quick assembly; the automation degree is high, the current lifting speed is high, the pressure is stable, and the current and the voltage of each unit cell of the electrolytic cell can be monitored at any time; the single device has high capacity and can reach 10MW of hydrogen productionEnergy is saved; the hydrogen production system has high automation degree and good safety performance, and can realize unattended operation and remote control on site; the operation at normal pressure is adopted, so that the hydrogen is produced by utilizing renewable energy sources;
the device has the advantages of capacity, the hydrogen production capacity of a single electric tank can reach 5 MW-10 MW, and the whole device has small volume and light weight;
the electrolytic cell runs at low pressure (generally about 500mm water column), is convenient to operate and has high safety performance;
the performance of an electrolytic cell electrode is advanced, the electrolytic cell is of a membrane polar distance structure, the designed operating current density is 12KA/m < 2 >, the normal operating current density can be more than 8kA/m < 2 > according to the performance of the current ion-permeable membrane, the operating cell voltage is low, the hydrogen-generating power consumption is lower than the industry level, and the unit power consumption is about 4.3 degrees/Nm < 3 > of hydrogen;
the electrolytic cell is assembled on site, and is convenient to maintain, disassemble and assemble in the production process, and particularly, the filter press type disassembly and assembly is more convenient;
the power supply load has strong adaptability to the change of the power supply load, and can stably run in the range of 10-100% of the load;
the service life of the device is long and can reach 30 years.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a block diagram of the present invention.
Fig. 2 is a schematic structural diagram of the power supply, distribution and control system of the present invention.
FIG. 3 is a sectional view of the middle frame electrolytic cell of the present invention.
FIG. 4 is a schematic structural view of the anode of the middle frame electrolytic cell of the present invention.
FIG. 5 is a schematic structural view of the cathode of the middle frame electrolytic cell of the present invention.
Fig. 6 is a schematic view of a first structure of the elastomer structure of the present invention.
Fig. 7 is a second schematic structural view of the elastomer structure of the present invention.
FIG. 8 is a schematic view of the structure of the anode end frame electrolytic cell of the present invention.
FIG. 9 is a perspective sectional view of the cathode end frame electrolytic cell of the present invention.
FIG. 10 is a schematic view of the whole electrolytic cell of the present invention.
FIG. 11 is a side view of the whole electrolytic cell of the present invention.
FIG. 12 is a schematic view of a first structure of the whole electrolytic cell of the present invention.
FIG. 13 is a second schematic view of the whole electrolytic cell of the present invention.
In the figure: 1. a frame; 2. an anode portion; 3. a cathode portion;
21. an anode disk; 22. anode rib plates; 23. an anode electrode;
31. a cathode disk; 32. a cathode elastomeric structure; 33. a cathode electrode;
41. sealing gaskets; 42. an ion permeable membrane; 43. an insulating plate; 44. a groove locking screw;
51. an oil cylinder; 52. a front fixed seat; 53. a movable seat; 54. a rear fixed seat; 55. a side lever; 56. a middle seat.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Example 1
Referring to fig. 1-2, the present invention relates to a new process for producing hydrogen by electrolyzing alkaline water, which comprises a hydrogen production system, wherein the hydrogen production system comprises a hydrogen production system, a gas-liquid separation system, a water and alkali adding system, and a power supply and distribution and control system; the hydrogen preparation system is connected with the gas-liquid separation system, the gas-liquid separation system is connected with the water and alkali adding system, and the power supply and distribution and control system is respectively connected with the hydrogen preparation system, the gas-liquid separation system and the water and alkali adding system through electric wires;
the hydrogen preparation system comprises an electrolytic cell, and water in the electrolytic cell is decomposed into hydrogen and oxygen under the action of current;
the gas-liquid separation system comprises a hydrogen-oxygen separator, an alkali liquor filter, an alkali liquor cooler and an oxygen-hydrogen cooler;
wherein, the hydrogen-oxygen separator comprises an anode liquid-gas separator and a cathode liquid-gas separator; the alkali liquor filter comprises an anolyte filter and a catholyte filter, the alkali liquor cooler comprises an anolyte cooler and a catholyte cooler, and the oxyhydrogen cooler comprises a hydrogen cooler and an oxygen cooler;
the electrolytic bath of the hydrogen preparation system is respectively connected with the hydrogen separator and the oxygen separator;
the gas outlet of the anode liquid-gas separator is provided with an oxygen cooler and conveys oxygen to a user through oxygen cooling, and the gas outlet of the cathode liquid-gas separator is provided with a hydrogen cooler and conveys hydrogen to the user through the hydrogen cooler;
an anolyte circulating groove is arranged at a liquid outlet of the anolyte gas-liquid separator, the anolyte circulating groove is connected with an electrolytic tank through a pump body, an anolyte filter and an anolyte cooler are arranged at a connecting pipeline of the anolyte circulating groove and the electrolytic tank, a catholyte circulating groove is arranged at a liquid outlet of the catholyte gas-liquid separator, the catholyte circulating groove is connected with the electrolytic tank through the pump body, and a catholyte filter and a catholyte cooler are arranged at a connecting pipeline of the catholyte circulating groove and the electrolytic tank;
when the hydrogen and oxygen separator works, the hydrogen, oxygen and KOH solution delivered by the hydrogen preparation device are separated in the hydrogen and oxygen separator, and the separated hydrogen and oxygen are cooled by the cooler and automatically emptied after the drop catcher catches drops. The separated alkali liquor enters a circulating tank and returns to the electrolytic tank again for electrolysis under the action of a pump. Part of electric energy can be converted into heat energy in the electrolysis process to continuously raise the temperature of the electrolytic bath, and in order to keep the required temperature of the alkali liquor in the electrolytic bath, the heat of the alkali liquor needs to be taken away by an alkali liquor cooler. The purpose of controlling the temperature of the alkali liquor at the outlet of the electrolytic cell is achieved by adjusting the flow rate of the cooling water of the alkali liquor cooler;
the water and alkali adding system comprises a water adding pump, an alkali distributing pump, a raw material water tank and an alkali liquid tank, wherein the alkali liquid tank is respectively connected with the anode liquid circulating tank and the cathode liquid circulating tank through the alkali distributing pump, and the raw material water tank is connected with the electrolytic bath through the water adding pump;
when the water tank works, the raw material water tank is used for containing pure water. The lye tank is used for preparing lye or containing lye. When preparing the alkali liquor, starting an alkali preparation pump, circulating water in an alkali liquor tank under the action of the pump, gradually adding solid KOH or concentrated alkali into the alkali liquor tank until the specific gravity of the alkali liquor reaches a set value, and preparing the potassium hydroxide solution when the concentration of the KOH solution is generally controlled to be about 25-35%. When the prepared alkali liquor is injected into the hydrogen production system, an alkali preparation pump is still needed, and the process is called alkali supplement. When the hydrogen production system is stopped for maintenance, the alkali liquor in the system needs to be returned to the alkali liquor tank, and the operation of a relevant valve and a cathode-anode liquor circulating pump is also needed, at the moment, the flow direction of the alkali liquor in a pipeline is just opposite to that of the alkali liquor during alkali supplement, and the process is called alkali removal. Along with the operation of the system, the pure water in the hydrogen production system is continuously consumed, the pure water in the system needs to be supplemented at any time, and the action is realized by a water supplementing pump. The water replenishing pump is preferably a plunger pump, the outlet pressure of the pump is greater than the operating pressure of the system, and water can be replenished into the hydrogen production system under the condition that the hydrogen production system normally operates.
The power supply, distribution and control system comprises a power distribution cabinet, a program control cabinet, a rectifier transformer and a rectifier cabinet; the rectifier transformer and the rectifier cabinet convert 380V three-phase electricity into voltage and current matched with the electrolytic bath, and the voltage and current are conveyed to the electrolytic bath through the copper bar. A Programmable Logic Controller (PLC) is installed in the program control cabinet, and a pre-programmed program is written into the PLC, so that the PLC can output signals according to the program requirement to control the operation of related instruments and valves. Thereby realizing the normal operation of the whole set of equipment.
And, controlling the above process:
the alkali preparation is automatic, the amount of pure water to be added can be calculated according to the addition of concentrated alkali, sand is started to be mixed, and the mixture can be added into an anode-cathode circulating tank after the concentration is qualified;
the nitrogen charging of the main liquid outlet pipe and the cathode-anode circulating tank of the electric tank is automatic, the automatic emptying is realized by controlling the pressure through an automatic valve, an online gas analyzer is arranged, and the electric tank is powered on after meeting the conditions;
the electric tank can automatically fill liquid, the circulating tank can automatically replenish liquid, the anode electrode liquid circulating tank is automatically electrically heated, the electric heating is automatically started after the circulating pump starts circulation, and the electric heating is automatically stopped after the temperature reaches the set temperature;
controlling the hydrogen and oxygen pressure at the outlet of the electric tank in a cascade mode, boosting along with the rise of current, emptying the initial hydrogen and oxygen through an automatic emptying valve, and automatically switching to convey the hydrogen and oxygen to a user after the hydrogen and oxygen are qualified through online analysis;
the water adding system can automatically add water according to the concentration and the current of the catholyte, so as to ensure that the concentration of the electrolyte is in a normal range;
the bottoms of the cathode and anode circulating tanks are communicated, and the outlets of the cathode and anode circulating tanks are provided with pipelines communicated with each other, so that the balance of the concentration and the liquid level of the cathode and anode circulating tanks is ensured;
the temperature of the anode circulating alkali liquor is automatically controlled, so that the temperature of the electrolytic bath is in a normal range, and the diaphragm is kept in a high-efficiency range;
the total cell voltage and the voltage of each unit are monitored on line.
The direct current electric quantity and the hydrogen yield are displayed on line, and the hydrogen power consumption is displayed in real time.
The process is intrinsically safe: interlock system
The water electrolysis device is provided with a process interlock, and the signals are input by the process interlock to cause abnormity, so that the hydrogen production device is ensured to stop and effectively process; if one of the cathode and anode circulating pumps stops abnormally, so that the pressure of the outlet of the pump is low, the other pump is started, and the failed pump stops and gives an alarm after the pressure is normal; if the pressure can not be ensured, the system is stopped;
the cathode and the anode enter the tank, the electrolyte flow is low, the alarm is interlocked, the electrolyte flow LL exceeds 5 seconds, and the system is stopped;
the rectification fault can not be recovered, the system is stopped, and an automatic processing program is entered;
when the hydrogen-oxygen pressure difference at the outlet of the electrobath exceeds the HH value, the system stops after 5 seconds; the oxygen and hydrogen contents in the oxyhydrogen at the outlet of the electric tank exceed the HH value, and the system stops after 3 seconds;
the total voltage of the electrolytic cell and the voltage of each unit are monitored on line, and if the HH and LL are abnormal, the system is stopped for more than 5 seconds;
after the water electrolysis hydrogen production device is stopped, the system interlock can automatically process, and the following signals are output: the catholyte water replenishing valve is cut off, the flow is 0, and the pump is controlled by frequency conversion; the valve from the hydrogen-oxygen pipeline to the user is automatically cut off, and the hydrogen-oxygen system can be filled with nitrogen for replacement and also can maintain pressure; the circulation flow of the cathode and the anode is automatically adjusted, circulation is kept, and a certain temperature is kept.
Example 2
Based on the above example 1, please refer to fig. 3-13, the utility model is a novel electrolytic tank for producing hydrogen by electrolyzing water; the electrolytic tank is a multi-pole electrolytic tank, and a group of electrolytic tanks is composed of an anode end frame electrolytic tank, a plurality of middle frame electrolytic tanks and a cathode end frame electrolytic tank; the middle frame electrolytic tank consists of a frame 1, an anode part 2 and a cathode part 3;
the frame 1 is formed by welding or bolting 4 steel or rectangular pipes with rectangular sections, plays roles of a framework and a load bearing function, and is provided with brackets at two sides;
the anode part 2 consists of an anode disc 21, an anode rib plate 22 and an anode electrode 23, and except the anode electrode 23, the materials are all pure nickel materials or 310s stainless steel, preferably pure nickel materials with excellent alkali corrosion resistance and conductivity;
the anode electrode 23 is made of an expanded mesh formed by punching pure nickel plates as a base material, an active catalyst layer with low oxygen evolution potential is made on the surface of the base material, and the active catalyst layer is made of oxidation-resistant Raney nickel, platinum, iron cobalt nickel and the like with low oxygen evolution potential;
the cathode part 3 consists of a cathode disc 31, a cathode elastomer structure 32, a cathode electrode 33 and the like; the cathode disc 31 is made of pure nickel or 310S stainless steel, preferably pure nickel, and the cathode elastomer structure 32 can be made of various structures, one of which is composed of cathode rib plates, a cathode bottom net and an elastic layer (see figure 4), the other of which is an elastomer directly made of thin nickel plates (see figure 5), and the other of which is the cathode elastomer structure. The cathode electrode 33 is made of a nickel wire mesh grid or a thin nickel plate expanded mesh as a base material, and a precious metal oxide catalyst layer such as platinum and iridium is manufactured on the surface of the base material in a high-temperature sintering oxidation or electroplating mode;
wherein the shape of the electrolytic cell is rectangular or square, preferably rectangular; the effective area of the electrolytic cell is 0.6-3.6 m 2 ；
The anode disc 21 and the cathode disc 32 can be independent and respectively buckled on the frame to be welded together, or a partition board can be used for partitioning the middle frame electrolytic tank into an anode chamber and a cathode chamber;
the anode end frame electrolytic tank consists of an anode part, a frame and a conductive copper bar on the back, wherein the conductive copper bar can be upwards or downwards; the cathode end frame electrolytic cell consists of a cathode part, a frame and a conductive copper bar on the back, wherein the conductive copper bar can move upwards or downwards.
Example 2
Based on the above example 1, the whole electrolytic cell includes the cell group 4;
the electric cell group 4 comprises an anode end frame electrolytic cell, a middle frame electrolytic cell and a cathode end frame electrolytic cell;
a plurality of middle frame electrolytic tanks are arranged between the anode end frame electrolytic tank and the cathode end frame electrolytic tank side by side, two sealing gaskets 41 are arranged between the sealing surfaces of the anode end frame electrolytic tank and the middle frame electrolytic tank, between the sealing surfaces of the middle frame electrolytic tank and the middle frame electrolytic tank, and between the sealing surfaces of the middle frame electrolytic tank and the cathode end frame electrolytic tank, an ion permeable membrane 42 is arranged between the two sealing gaskets 41, a fixed frame 45 is arranged at one side of the anode end frame electrolytic tank far away from the middle frame electrolytic tank, a fixed frame 45 is arranged at one side of the cathode end frame electrolytic tank far away from the middle frame electrolytic tank, an insulating plate 43 is arranged between the anode end frame electrolytic tank and the fixed frame 45, and between the cathode end frame electrolytic tank and the fixed frame 45, and the two fixed frames 45 are connected through a locking groove screw 44;
the number of the screw rods is configured according to the area of the electrolytic cell, the area is large, the number of the screw rods is large, and the cell group is locked by applying proper torque force;
the anode end frame electric tank and the cathode end frame electric tank are connected with a direct current power supply through a plurality of cables to form a loop;
the feeding main pipe and the discharging main pipe are connected with the cathode and anode connecting pipes of each unit cell through hoses.
Example 3
Based on the embodiment 2, the whole electrolytic tank is assembled by adopting a filter press type oil cylinder pressure locking groove mode, and comprises an oil cylinder 51, a front fixed seat 52, a movable seat 53, a rear fixed seat 54 and a side lever 55;
the front fixed seat 52, the rear fixed seat 54 and the side lever 55 enclose a rectangular frame structure, one side of the front fixed seat 52 is provided with an oil cylinder 51, the output end of the oil cylinder 51 is connected with the movable seat 53, the anode end frame electrolytic tank is arranged on the movable seat 53, and the cathode end frame electrolytic tank is arranged on the rear fixed seat 54;
wherein, the front fixed seat 52 and the rear fixed seat 54 are respectively arranged at the left and the right, and the side rods 55 are respectively arranged at the front and the rear;
during operation, the oil cylinder 51 is controlled to operate, so as to drive the movable seat 43 to move along the side rod 55, and the assembly of the whole electrolytic cell is completed.
Example 4
Based on the above example 3, example 3 is a single-head extrusion forming one electrobath for installing one group of electrobaths, while example 4 is a double-head extrusion forming one electrobath for installing two groups of electrobaths;
a middle seat 56 is arranged between the front fixed seat 52 and the rear fixed seat 54, and side rods 55 are respectively arranged on the front side and the rear side of the front fixed seat 52 and the middle seat 56 and on the front side and the rear side of the rear fixed seat 54 and the middle seat 56;
one side of the front fixed seat 52 and one side of the rear fixed seat 54 are respectively provided with an oil cylinder 51, the output end of the oil cylinder 51 is connected with a movable seat 53, an anode end frame electrolytic tank is arranged on the movable seat 53, and two sides of the middle seat 56 are respectively provided with a cathode end frame electrolytic tank;
during operation, the two oil cylinders 51 are controlled to operate, so that the movable seat 43 is driven to move along the side rods 55, and the assembly of the two electrolytic tanks is completed.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, thereby enabling others skilled in the art to best understand the invention and its practical application. The present invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. A hydrogen production system for producing hydrogen by electrolyzing alkaline water is characterized by comprising a hydrogen production system, a gas-liquid separation system, a water and alkali adding system and a power supply, distribution and control system; the hydrogen preparation system is connected with the gas-liquid separation system, the gas-liquid separation system is connected with the water and alkali adding system, and the power supply and distribution and control system is respectively connected with the hydrogen preparation system, the gas-liquid separation system and the water and alkali adding system through electric wires;
the hydrogen preparation system comprises an electrolytic cell, and water in the electrolytic cell is decomposed into hydrogen and oxygen under the action of current;
the gas-liquid separation system comprises a hydrogen-oxygen separator, an alkali liquor filter, an alkali liquor cooler and an oxygen-hydrogen cooler; the electrolytic bath of the hydrogen preparation system is respectively connected with the hydrogen separator and the oxygen separator;
the gas outlet of the anode liquid-gas separator is provided with an oxygen cooler and conveys oxygen to a user through oxygen cooling, and the gas outlet of the cathode liquid-gas separator is provided with a hydrogen cooler and conveys hydrogen to the user through the hydrogen cooler;
an anolyte circulating groove is arranged at a liquid outlet of the anolyte gas-liquid separator, the anolyte circulating groove is connected with an electrolytic tank through a pump body, an anolyte filter and an anolyte cooler are arranged at a connecting pipeline of the anolyte circulating groove and the electrolytic tank, a catholyte circulating groove is arranged at a liquid outlet of the catholyte gas-liquid separator, the catholyte circulating groove is connected with the electrolytic tank through the pump body, and a catholyte filter and a catholyte cooler are arranged at a connecting pipeline of the catholyte circulating groove and the electrolytic tank;
the water and alkali adding system comprises a water adding pump, an alkali preparing pump, a raw material water tank and an alkali liquid tank, wherein the alkali liquid tank is respectively connected with the anode liquid circulating tank and the cathode liquid circulating tank through the alkali preparing pump, and the raw material water tank is connected with the electrolytic bath through the water adding pump.
2. A hydrogen production system by electrolysis of alkaline water to produce hydrogen according to claim 1, characterized in that the electrolysis cell comprises a cell bank (4);
the electric cell group (4) comprises an anode end frame electrolytic cell, a middle frame electrolytic cell and a cathode end frame electrolytic cell;
a plurality of middle frame electrolytic tanks are arranged between the anode end frame electrolytic tank and the cathode end frame electrolytic tank side by side, two sealing gaskets (41) are arranged between the sealing surfaces of the anode end frame electrolytic tank and the middle frame electrolytic tank, between the sealing surfaces of the middle frame electrolytic tank and between the sealing surfaces of the middle frame electrolytic tank and the cathode end frame electrolytic tank, an ion permeable membrane (42) is arranged between the two sealing gaskets (41), a fixed frame (45) is arranged at one side of the anode end frame electrolytic tank far away from the middle frame electrolytic tank, a fixed frame (45) is arranged at one side of the cathode end frame electrolytic tank far away from the middle frame electrolytic tank, an insulating plate (43) is arranged between the anode end frame electrolytic tank and the fixed frame (45) and between the cathode end frame electrolytic tank and the fixed frame (45), and the two fixed frames (45) are connected through a locking groove screw (44);
the anode end frame electric tank and the cathode end frame electric tank are connected with a direct current power supply through a plurality of cables to form a loop;
the feeding main pipe and the discharging main pipe are connected with the cathode and anode connecting pipes of each unit cell through hoses.
3. The hydrogen production system for electrolyzing alkaline water to produce hydrogen according to claim 1, wherein the electrolytic cell is assembled in a filter press type oil cylinder pressure locking groove mode, and comprises an oil cylinder (51), a front fixed seat (52), a movable seat (53), a rear fixed seat (54) and a side lever (55);
a front fixed seat (52), a rear fixed seat (54) and a side lever (55) are enclosed to form a rectangular frame structure, an oil cylinder (51) is arranged on one side of the front fixed seat (52), the output end of the oil cylinder (51) is connected with a movable seat (53), an anode end frame electrolytic tank is arranged on the movable seat (53), and a cathode end frame electrolytic tank is arranged on the rear fixed seat (54).
4. The hydrogen production system for electrolyzing alkaline water to produce hydrogen according to claim 3, wherein the electrolytic cell is assembled in a filter press type oil cylinder pressure groove locking manner, and further comprises an intermediate seat (56) arranged between the front fixed seat (52) and the rear fixed seat (54), and side rods (55) are respectively arranged on the front fixed seat (52), the front side and the rear side of the intermediate seat (56), the rear fixed seat (54) and the front side and the rear side of the intermediate seat (56);
an oil cylinder (51) is respectively arranged on one side of the front fixed seat (52) and one side of the rear fixed seat (54), the output end of the oil cylinder (51) is connected with the movable seat (53), an anode end frame electrolytic tank is arranged on the movable seat (53), and cathode end frame electrolytic tanks are respectively arranged on two sides of the middle seat (56).
5. The hydrogen production system for electrolyzing alkaline water to produce hydrogen according to claim 1, wherein the electrolytic cell is a multi-pole electrolytic cell, and a group of electrolytic cells is composed of an anode end frame electrolytic cell, a plurality of middle frame electrolytic cells and a cathode end frame electrolytic cell; the middle frame electrolytic tank consists of a frame (1), an anode part (2) and a cathode part (3).
6. The hydrogen production system by electrolyzing alkaline water to produce hydrogen according to claim 5, wherein the frame (1) is composed of 4 steel materials with rectangular cross section or rectangular tubes connected by welding or bolts.
7. The hydrogen production system for electrolyzing alkaline water to produce hydrogen according to claim 5, characterized in that the anode part (2) is composed of an anode disc (21), an anode rib plate (22) and an anode electrode (23), and the materials except the anode electrode (23) are pure nickel or 310s stainless steel.
8. The hydrogen production system by electrolyzing alkaline water to produce hydrogen according to claim 5, wherein the cathode part (3) comprises a cathode disk (31), a cathode elastomer structure (32), a cathode electrode (33); the cathode disc (31) is made of pure nickel or 310S stainless steel, and the cathode elastic body structure (32) is composed of cathode rib plates, a cathode bottom net and an elastic layer or is an elastic body directly made of a thin nickel plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222290026.7U CN218596533U (en) | 2022-08-30 | 2022-08-30 | Hydrogen production system for producing hydrogen by electrolyzing alkaline water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222290026.7U CN218596533U (en) | 2022-08-30 | 2022-08-30 | Hydrogen production system for producing hydrogen by electrolyzing alkaline water |
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