CN217473191U - Automatic gas mixture generating device of ratio - Google Patents
Automatic gas mixture generating device of ratio Download PDFInfo
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- CN217473191U CN217473191U CN202221411556.6U CN202221411556U CN217473191U CN 217473191 U CN217473191 U CN 217473191U CN 202221411556 U CN202221411556 U CN 202221411556U CN 217473191 U CN217473191 U CN 217473191U
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Abstract
The utility model discloses an automatic-proportioning mixed gas generating device, which comprises a central processing unit, a gas flowmeter, an electrolytic cell, a static mixer, a gas proportion analyzer, a nitrogen input port and a nitrogen-hydrogen mixed gas output port; the nitrogen input port is connected with the input end of the gas flowmeter, the input end of the static mixer is respectively connected with the output end of the electrolytic cell and the output end of the gas flowmeter, and the output end of the static mixer is connected with the nitrogen-hydrogen mixed gas output port; the input end of the gas proportion analyzer is connected with the output end of the static mixer; the output end of the gas proportion analyzer is in signal connection with the input end of the central processing unit; the input end of the central processing unit is in signal connection with the output end of the gas flowmeter; the output end of the central processing unit is in signal connection with the input end of the electrolytic cell. The utility model discloses an automatic gas mixture generating device of ratio to water electrolysis preparation hydrogen can prepare the mist safely, with low costs.
Description
Technical Field
The utility model relates to a gaseous proportioning device technical field, more specifically say, relate to an automatic gas mixture generating device of ratio.
Background
In industrial production, for example, in the production of products in the fields of electroplating, electronics, semiconductors, and the like, a nitrogen-hydrogen mixed gas composed of a mixture of nitrogen and hydrogen is widely used. And the production of the nitrogen-hydrogen mixed gas needs to use a gas proportioning and mixing device to control the proportion of nitrogen and hydrogen in the mixed gas. The existing nitrogen-hydrogen proportioning device generally needs to be additionally provided with a hydrogen source and a nitrogen source to produce the nitrogen-hydrogen mixed gas. At normal temperature and pressure, hydrogen is a very combustible gas, can be combusted at a volume fraction of 4% to 75% in air, and is in danger of explosion when mixed with fluorine, chlorine, oxygen, carbon monoxide and air. Wherein, the mixture of hydrogen and fluorine can generate spontaneous explosion in low temperature and dark environment, and the volume ratio of the mixture to chlorine is 1: 1, it can explode under light. The prior nitrogen-hydrogen proportioning device has potential safety hazard and low acquisition cost because a hydrogen source is additionally purchased when the nitrogen-hydrogen mixed gas is prepared.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect and not enough, provide an automatic gas mixture generating device of ratio to water electrolysis preparation hydrogen can prepare the mist safely, with low costs.
The purpose of the utility model can be realized by the following technical proposal: an automatic proportioning mixed gas generating device comprises a central processing unit, a gas flowmeter, an electrolytic cell, a static mixer, a gas proportion analyzer, a nitrogen input port and a nitrogen-hydrogen mixed gas output port; the nitrogen input port is connected with the input end of the gas flowmeter, the input end of the static mixer is respectively connected with the output end of the electrolytic cell and the output end of the gas flowmeter, and the output end of the static mixer is connected with the nitrogen-hydrogen mixed gas output port; the input end of the gas proportion analyzer is connected with the output end of the static mixer; the output end of the gas proportion analyzer is in signal connection with the input end of the central processing unit; the input end of the central processing unit is in signal connection with the output end of the gas flowmeter; the output end of the central processing unit is in signal connection with the input end of the electrolytic cell.
Further, the device also comprises a gas-liquid separator. The input end of the gas-liquid separator is connected with the output end of the static mixer, and the output end of the gas-liquid separator is connected with the output port of the nitrogen-hydrogen mixed gas; or the input end of the gas-liquid separator is connected with the output end of the electrolytic bath, and the output end of the gas-liquid separator is connected with the input end of the static mixer. After the structure is adopted, the liquid water in the nitrogen-hydrogen mixed gas or the hydrogen can be separated and filtered, so that the work load of the molecular sieve adsorber is reduced.
Further, the device also comprises a molecular sieve adsorber. The input end of the molecular sieve adsorber is connected with the output end of the gas-liquid separator, and the output end of the molecular sieve adsorber is connected with the output end of the nitrogen-hydrogen mixed gas or the input end of the static mixer. After the structure is adopted, impurities such as water, carbon dioxide, oxygen and the like in the nitrogen-hydrogen mixed gas or hydrogen can be removed, so that the purity of the nitrogen-hydrogen mixed gas or hydrogen is improved.
Further, the molecular sieve adsorber comprises a first adsorption tower, a silencer and a second adsorption tower. The input ends of the first adsorption tower, the silencer and the second adsorption tower are respectively connected with the output end of the gas-liquid separator, and the output ends of the first adsorption tower and the second adsorption tower are respectively connected with the output end of the nitrogen-hydrogen mixed gas or the input end of the static mixer. After adopting the structure, the molecular sieve adsorber can purify the nitrogen-hydrogen mixed gas or hydrogen through pressure swing adsorption of impurities.
Further, a nitrogen input end pressure reducing valve is also included. The pressure reducing valve at the nitrogen input end is arranged between the output end of the gas flowmeter and the input end of the static mixer. After adopting this kind of structure, the inlet pressure of steerable nitrogen gas input is favorable to the steady operation of device.
Further, the device also comprises a gas output end pressure reducing valve. The gas output end pressure reducing valve is arranged at the output end of the molecular sieve adsorber. After adopting this kind of structure, can stabilize the pressure of gas output port department, be favorable to the steady output of nitrogen-hydrogen mist.
Further, the gas ratio analyzer pressure reducing valve is further included. The pressure reducing valve of the gas proportion analyzer is arranged between the input end of the gas proportion analyzer and the output end of the static mixer. After adopting this kind of structure, can avoid gas ratio analysis appearance to receive too big atmospheric pressure and strike.
Further, a human-computer interaction interface for inputting the mixing proportion parameters is further included. The man-machine interaction interface is arranged on the central processing unit. After the structure is adopted, the nitrogen-hydrogen mixing proportion can be set on a human-computer interaction interface, and hydrogen proportion information for preparing the nitrogen-hydrogen mixed gas is transmitted to the central processing unit.
Furthermore, the electrolytic cell is externally connected with a water source, and the nitrogen input port is externally connected with a nitrogen source. After adopting this kind of structure, can make the device security performance improve, use cost reduction.
Furthermore, the central processing unit adopts a PLC central processing unit, and the gas proportion analyzer adopts a hydrogen analyzer. After adopting this kind of structure, can make device convenient to use, easy operation, the reliability is high.
Compared with the prior art, the utility model, have following advantage and beneficial effect:
1. the utility model discloses an automatic gas mixture generating device of ratio adopts electrolysis trough water electrolysis preparation hydrogen, and the in-process of preparation nitrogen hydrogen mist does not produce the hydrogen of high concentration, need not pure hydrogen, and the device is safer.
2. The utility model discloses an automatic gas mixture generating device of ratio need not purchase the hydrogen source in addition, and use cost descends.
3. The utility model discloses an automatic gas mixture generating device of ratio adopts the dry nitrogen-hydrogen mist of molecular sieve adsorber purification, improves nitrogen-hydrogen mist's purity.
4. The utility model discloses an automatic produced regeneration gas of gas mixture generating device of ratio is the gas mixture that hydrogen content is low, compares the regeneration of present technology reuse pure hydrogen, discharges safelyr, and the cost is lower.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of an apparatus according to embodiment 2 of the present invention.
Wherein: 1: central processing unit, 2: gas flow meter, 3: electrolytic cell, 4: static mixer, 5: gas ratio analyzer, 6: nitrogen gas inlet port, 7: nitrogen-hydrogen mixed gas output port, 8: gas-liquid separator, 9: molecular sieve adsorber, 91: first adsorption column, 92: muffler, 93: second adsorption column, 10: nitrogen input pressure reducing valve, 11: gas outlet pressure reducing valve, 12: gas ratio analyzer pressure reducing valve.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.
Example 1:
as shown in fig. 1, the automatic proportioning mixed gas generating device comprises a central processing unit 1, a gas flowmeter 2, an electrolytic cell 3, a static mixer 4, a gas proportion analyzer 5, a nitrogen input port 6, a nitrogen-hydrogen mixed gas output port 7, a gas-liquid separator 8, a molecular sieve adsorber 9, a nitrogen input end pressure reducing valve 10, a gas output end pressure reducing valve 11 and a gas proportion analyzer pressure reducing valve 12.
The nitrogen input port 6 is externally connected with a nitrogen source, the nitrogen input port 6 is connected with the input end of the gas flowmeter 2, nitrogen is input from the nitrogen input port 6, and the gas flowmeter 2 is used for measuring the flow rate of the nitrogen introduced from the nitrogen input port 6. The electrolytic cell 3 is externally connected with pure water, and the electrolytic cell 3 is used for electrolyzing hydrogen from the introduced pure water. The input of static mixer 4 is connected with the output of electrolysis trough 3, gas flowmeter 2's output respectively, and the hydrogen that 3 electrolysis troughs electrolyzed leads to static mixer 4, and nitrogen gas leads to static mixer 4 through gas flowmeter 2, and hydrogen mixes with nitrogen gas in static mixer 4 and forms nitrogen-hydrogen mixed gas. A nitrogen input pressure reducing valve 10 is provided between the output of the gas flow meter 2 and the input of the static mixer 4 for controlling the intake pressure at the nitrogen input.
The input end of the gas-liquid separator 8 is connected with the output end of the static mixer 4, and the gas-liquid separator 8 is used for separating and removing liquid water in the mixed gas. The input end of the molecular sieve adsorber 9 is connected with the output end of the gas-liquid separator 8, the output end of the molecular sieve adsorber 9 is connected with the nitrogen-hydrogen mixed gas output port 7, the molecular sieve adsorber 9 is used for removing impurities such as moisture, carbon dioxide and oxygen in the nitrogen-hydrogen mixed gas, and the dried and purified nitrogen-hydrogen mixed gas is output from the nitrogen-hydrogen mixed gas output port 7. The molecular sieve adsorber 9 comprises a first adsorption tower 91, a silencer 92 and a second adsorption tower 93, wherein the input ends of the first adsorption tower 91, the silencer 92 and the second adsorption tower 93 are respectively connected with the output end of the gas-liquid separator 8, and the output ends of the first adsorption tower 91 and the second adsorption tower 93 are respectively connected with the nitrogen-hydrogen mixed gas output port 7. The first adsorption tower 91 and the second adsorption tower 93 are used for adsorbing the regenerated nitrogen-hydrogen mixed gas, drying and purifying the mixed gas, and the silencer 92 is used for reducing noise generated in the molecular sieve adsorber 9 and keeping pressure stable. And a gas output end pressure reducing valve 11 is arranged at the output end of the molecular sieve adsorber (9) and used for stabilizing the pressure at the nitrogen-hydrogen mixed gas output end 7 so as to ensure that the nitrogen-hydrogen mixed gas is stably output.
The input end of the gas proportion analyzer 5 is connected with the output end of the molecular sieve adsorber 9, the output end is in signal connection with the input end of the central processing unit 1, and the gas proportion analyzer 5 is used for analyzing the dry and purified nitrogen-hydrogen mixed gas components and outputting gas component analysis information to the central processing unit 1. The gas proportion analyzer 5 adopts a hydrogen analyzer. A gas ratio analyzer pressure reducing valve 12 is arranged between the input end of the gas ratio analyzer 5 and the output end of the molecular sieve adsorber 9, and is used for preventing the gas ratio analyzer 5 from being impacted by overlarge air pressure. The input end of the central processing unit 1 is in signal connection with the output end of the gas flowmeter 2 and inputs nitrogen flow information of the gas flowmeter 2. The output end of the central processing unit 1 is in signal connection with the input end of the electrolytic cell 3 and outputs the calculated required direct current working current information to the electrolytic cell 3. The human-computer interaction interface is arranged on the central processing unit 1, the nitrogen-hydrogen mixing proportion can be set on the human-computer interaction interface, and hydrogen proportion information for preparing nitrogen-hydrogen mixed gas is transmitted to the central processing unit 1. The central processing unit 1 adopts a PLC central processing unit.
Example 2:
as shown in fig. 2, the automatic proportioning mixed gas generating device comprises a central processing unit 1, a gas flowmeter 2, an electrolytic cell 3, a static mixer 4, a gas proportion analyzer 5, a nitrogen input port 6, a nitrogen-hydrogen mixed gas output port 7, a gas-liquid separator 8, a molecular sieve adsorber 9, a nitrogen input end pressure reducing valve 10, a gas output end pressure reducing valve 11 and a gas proportion analyzer pressure reducing valve 12.
The electrolytic cell 3 is externally connected with pure water, and the electrolytic cell 3 is used for electrolyzing hydrogen from the introduced pure water. The input end of the gas-liquid separator 8 is connected with the output end of the electrolytic bath 3, and the gas-liquid separator 8 is used for separating and removing liquid water in the hydrogen gas electrolyzed from the electrolytic bath 3. The input end of the molecular sieve adsorber 9 is connected with the output end of the gas-liquid separator 8, the output end of the molecular sieve adsorber 9 is connected with the input end of the static mixer 4, and the molecular sieve adsorber 9 is used for removing impurities such as moisture, carbon dioxide and oxygen in the hydrogen passing through the gas-liquid separator 8. The molecular sieve adsorber 9 comprises a first adsorption tower 91, a silencer 92 and a second adsorption tower 93, wherein the input ends of the first adsorption tower 91, the silencer 92 and the second adsorption tower 93 are respectively connected with the output end of the gas-liquid separator 8, and the output ends of the first adsorption tower 91 and the second adsorption tower 93 are respectively connected with the nitrogen-hydrogen mixed gas output port 7. The first adsorption tower 91 and the second adsorption tower 93 are used for adsorbing regenerated hydrogen, drying and purifying the hydrogen, and the silencer 92 is used for reducing noise generated in the molecular sieve adsorber 9 and keeping pressure stable.
The nitrogen input port 6 is externally connected with a nitrogen source, the nitrogen input port 6 is connected with the input end of the gas flow meter 2, nitrogen is input from the nitrogen input port 6, and the gas flow meter 2 is used for measuring the flow rate of the nitrogen introduced from the nitrogen input port 6. The hydrogen after being dried and purified by the molecular sieve adsorber 9 is input into the static mixer 4, the nitrogen is led to the static mixer 4 through the gas flowmeter 2, and the hydrogen and the nitrogen are mixed in the static mixer 4 to form the nitrogen-hydrogen mixed gas. A nitrogen input pressure reducing valve 10 is provided between the output of the gas flow meter 2 and the input of the static mixer 4 for controlling the intake pressure at the nitrogen input. And a gas output end pressure reducing valve 11 is arranged between the output end of the molecular sieve adsorber 9 and the input end of the static mixer 4 and used for stabilizing the pressure at the output end of the molecular sieve adsorber 9 and enabling hydrogen to be stably output.
The input end of the gas proportion analyzer 5 is connected with the output end of the static mixer 4, the output end is connected with the input end signal of the central processing unit 1, and the gas proportion analyzer 5 is used for analyzing the nitrogen-hydrogen mixed gas components after drying and purification and outputting the analysis information of the gas components to the central processing unit 1. The gas proportion analyzer 5 adopts a hydrogen analyzer. A gas ratio analyzer pressure reducing valve 12 is provided between the input of the gas ratio analyzer 5 and the output of the static mixer 4, in order to prevent the gas ratio analyzer 5 from being impacted by excessive gas pressure. The input end of the central processing unit 1 is in signal connection with the output end of the gas flowmeter 2 and inputs nitrogen flow information of the gas flowmeter 2. The output end of the central processing unit 1 is in signal connection with the input end of the electrolytic cell 3 and outputs the calculated required direct current working current information to the electrolytic cell 3. The human-computer interaction interface is arranged on the central processing unit 1, the nitrogen-hydrogen mixing proportion can be set on the human-computer interaction interface, and hydrogen proportion information for preparing nitrogen-hydrogen mixed gas is transmitted to the central processing unit 1. The central processing unit 1 adopts a PLC central processing unit.
The working principle of the automatic proportioning mixed gas generating device is as follows: the nitrogen-hydrogen mixing ratio value, for example 5%, and the information of 5% of mixed hydrogen are converted into 4-20mA signals to be input into the central processing unit 1. Nitrogen is input from a nitrogen input port 6, is input into the static mixer 4 through the gas flowmeter 2, the gas flowmeter 2 measures the flow rate of the input nitrogen, and the flow information is converted into a 4-20mA signal to be input into the central processing unit 1. The central processor 1 calculates the required hydrogen yield according to the 5 percent hydrogen mixing proportion and the nitrogen flow, and then calculates the direct current working current required by the electrolytic cell 3 according to the required hydrogen yield and the Faraday law of water electrolysis hydrogen production.
Wherein the direct current working current:
wherein I is the direct working current passing through the electrolysis cell,
for hydrogen production, n is the number of electrolysis cells in the cell and η is the current efficiency.
The CPU 1 converts the calculated required DC working current information into 4-20mA signals to be input into the electrolytic cell 3, and the electrolytic cell 3 outputs quantitative hydrogen under the action of the given DC working current. In example 1, hydrogen gas was fed into the static mixer 4, the hydrogen gas and nitrogen gas were mixed in the static mixer 4, and the mixed gas was fed into the gas-liquid separator 8 to separate liquid water and a mixed gas of nitrogen and hydrogen. The nitrogen-hydrogen mixed gas is input into the molecular sieve adsorber 9, and is dried and purified through a cyclic regeneration process formed by adsorption, pressure equalization, pressure reduction, release, flushing, re-pressurization and adsorption through the first adsorption tower 91, the silencer 92 and the second adsorption tower 93, and the dried high-purity nitrogen-hydrogen mixed gas is output from the molecular sieve adsorber 9 to the nitrogen-hydrogen mixed gas output port 7. In embodiment 2, hydrogen is input into the gas-liquid separator 8 to separate liquid water and gaseous hydrogen, the gaseous hydrogen is input into the molecular sieve adsorber 9, and is subjected to a cyclic regeneration process formed by adsorption, pressure equalization, pressure reduction, release, flushing, pressurization and adsorption through the first adsorption tower 91, the silencer 92 and the second adsorption tower 93, the gaseous hydrogen is dried and purified, and the dried high-purity hydrogen is output from the molecular sieve adsorber 9 to the input end of the static mixer 4. The nitrogen gas and the high-purity hydrogen gas are mixed in the static mixer 4 to form a high-purity nitrogen-hydrogen mixed gas, and the high-purity nitrogen-hydrogen mixed gas is output to the gas output port 7. The gas proportion analyzer 5 detects a hydrogen mixing proportion value from the nitrogen-hydrogen mixed gas, converts the hydrogen mixing proportion value information into a 4-20mA signal to be input into the central processing unit 1, and the central processing unit 1 compares the measured hydrogen mixing proportion value with a set nitrogen-hydrogen mixing proportion value. When the hydrogen mixing ratio has deviation, the central processing unit 1 converts the regulated required direct current working current information into a 4-20mA signal through comparison and calculation and inputs the 4-20mA signal into the electrolytic cell 3 for correction.
The utility model discloses an automatic gas mixture generating device of ratio does not produce high concentration hydrogen at the whole process of preparation nitrogen-hydrogen mist, and the hydrogen mixing proportion is 5 ~ 10% usually, and dry regeneration is also 5 ~ 10% gas mixture, need not pure hydrogen, and whole device is safer. Impurities such as water, carbon dioxide, oxygen and the like are filtered, and the purity of the nitrogen-hydrogen mixed gas is higher.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An automatic proportioning mixed gas generating device is characterized by comprising a central processing unit (1), a gas flowmeter (2), an electrolytic cell (3), a static mixer (4), a gas proportion analyzer (5), a nitrogen input port (6) and a nitrogen-hydrogen mixed gas output port (7);
the nitrogen input port (6) is connected with the input end of the gas flowmeter (2), the input end of the static mixer (4) is respectively connected with the output end of the electrolytic cell (3) and the output end of the gas flowmeter (2), and the output end of the static mixer (4) is connected with the nitrogen-hydrogen mixed gas output port (7);
the input end of the gas proportion analyzer (5) is connected with the output end of the static mixer (4); the output end of the gas proportion analyzer (5) is in signal connection with the input end of the central processing unit (1); the input end of the central processing unit (1) is in signal connection with the output end of the gas flowmeter (2); the output end of the central processing unit (1) is in signal connection with the input end of the electrolytic cell (3).
2. The automatic proportioning gas mixture generating device according to claim 1, wherein: also comprises a gas-liquid separator (8); the input end of the gas-liquid separator (8) is connected with the output end of the static mixer (4), and the output end of the gas-liquid separator is connected with the nitrogen-hydrogen mixed gas output port (7); or the input end of the gas-liquid separator (8) is connected with the output end of the electrolytic bath (3), and the output end of the gas-liquid separator is connected with the input end of the static mixer (4).
3. The automatic proportioning gas mixture generating device according to claim 2, wherein: also comprises a molecular sieve adsorber (9); the input end of the molecular sieve adsorber (9) is connected with the output end of the gas-liquid separator (8); the output end of the molecular sieve adsorber (9) is connected with the nitrogen-hydrogen mixed gas output port (7) or the input end of the static mixer (4).
4. The automatic proportioning gas mixture generating device according to claim 3, wherein: the molecular sieve adsorber (9) comprises a first adsorption tower (91), a silencer (92) and a second adsorption tower (93); the input ends of the first adsorption tower (91), the silencer (92) and the second adsorption tower (93) are respectively connected with the output end of the gas-liquid separator (8); the output ends of the first adsorption tower (91) and the second adsorption tower (93) are respectively connected with the nitrogen-hydrogen mixed gas output port (7) or the input end of the static mixer (4).
5. The automatic proportioning gas mixture generating device according to claim 1, wherein: the device also comprises a pressure reducing valve (10) at the nitrogen input end; the nitrogen input end pressure reducing valve (10) is arranged between the output end of the gas flowmeter (2) and the input end of the static mixer (4).
6. The automatic proportioning gas mixture generating device according to claim 3, wherein: the device also comprises a gas output end pressure reducing valve (11); and a gas output end pressure reducing valve (11) is arranged at the output end of the molecular sieve adsorber (9).
7. The automatic proportioning gas mixture generating device according to claim 1, wherein: the device also comprises a gas proportion analyzer pressure reducing valve (12); the gas ratio analyzer pressure reducing valve (12) is arranged between the input end of the gas ratio analyzer (5) and the output end of the static mixer (4).
8. The automatic proportioning gas mixture generating device according to claim 1, wherein: the system also comprises a human-computer interaction interface used for inputting the mixing proportion parameters; the man-machine interaction interface is arranged on the central processing unit (1).
9. The automatic proportioning mixture gas generating device according to any one of claims 1 to 8, wherein: the electrolytic tank (3) is externally connected with a water source; the nitrogen input port (6) is externally connected with a nitrogen source.
10. The automatic proportioning gas mixture generating device according to claim 9, wherein: the central processing unit (1) adopts a PLC central processing unit; the gas proportion analyzer (5) adopts a hydrogen analyzer.
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| CN202221411556.6U CN217473191U (en) | 2022-06-07 | 2022-06-07 | Automatic gas mixture generating device of ratio |
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