CN218221496U - Gas-liquid separator for hydrogen production and water electrolysis hydrogen production system - Google Patents

Abstract

The utility model discloses a gas-liquid separator for hydrogen production and an electrolytic water hydrogen production system, relating to the technical field of hydrogen production equipment, wherein the gas-liquid separator comprises a separator body, at least one double-chamber balance container and a differential pressure transmitter, wherein the separator body is provided with a cavity; the double-chamber balance container comprises an inner chamber and an outer chamber, wherein the volume of the inner chamber is smaller than that of the outer chamber, and the inner chamber is positioned in the outer chamber; the outer layer containing chamber is communicated with the cavity through a connecting pipe, the connecting pipe is positioned above the liquid level of the liquid, the inner layer containing chamber is communicated with the cavity through a communicating pipe, and the communicating pipe is positioned below the liquid level; a differential pressure transducer is in communication with a dual chamber equalization vessel. It can be seen that, the utility model discloses a two room balance container are connected the separator body with pressure differential transmitter, the pressure differential of the two room balance container that pressure differential transmitter is measurable, and two room balance container can be with the accurate conversion of this internal liquid level of pressure differential and separator to the accurate liquid level that obtains the separator.

Description

Gas-liquid separator for hydrogen production and water electrolysis hydrogen production system

Technical Field

The utility model belongs to the technical field of hydrogen manufacturing equipment, concretely relates to a vapour and liquid separator and electrolytic water hydrogen manufacturing system for hydrogen manufacturing.

Background

At present, the water electrolysis hydrogen production system is widely applied due to the advantages of energy conservation and environmental protection. The hydrogen production device by water electrolysis usually electrolyzes alkali liquor to obtain hydrogen and oxygen. Hydrogen and oxygen discharged from the electrolytic cell need to undergo gas-liquid separation via a gas-liquid separator to remove the alkali mist because they carry a large amount of alkali mist (may be called a gas-liquid mixture) by themselves.

The separator needs to be balanced in pressure during use to adjust the level of lye therein. In the related technology, when a gas-liquid mixture enters a separator, the liquid level can be greatly fluctuated, the precision of liquid level measurement is influenced, and the hydrogen production system by electrolyzing water has potential safety hazards.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a vapour and liquid separator and electrolytic water hydrogen manufacturing system for making hydrogen can solve among the correlation technique gas-liquid mixture and arouse the liquid level to produce great fluctuation when getting into the separator, and influence the technical problem of level measurement's precision.

In order to solve the technical problem, the utility model discloses a realize like this:

in a first aspect, the present invention provides a gas-liquid separator for hydrogen production, comprising: a separator body, at least one dual chamber equalization vessel, and a differential pressure transmitter, wherein the separator body has a cavity;

the double-chamber balance container comprises an inner chamber and an outer chamber, the volume of the inner chamber is smaller than that of the outer chamber, and the inner chamber is positioned in the outer chamber;

the outer-layer containing chamber is communicated with the cavity through a connecting pipe, the connecting pipe is positioned above the liquid level of the liquid, the inner-layer containing chamber is communicated with the cavity through a communicating pipe, and the communicating pipe is positioned below the liquid level;

one of the differential pressure transmitters is in communication with one of the dual chamber equalization vessels.

Further, the gas-liquid separator further includes: a stabilizer tube;

the stabilizing pipe is arranged in the cavity along the vertical direction;

the part of connecting pipe with the part of communicating pipe all stretches into in the cavity, just the connecting pipe is located one end in the cavity with communicating pipe is located one end in the cavity respectively with the stabilizator pipe intercommunication.

Further, the differential pressure transmitter has a high pressure side and a low pressure side, one of the high pressure side and the low pressure side is in communication with the outer chamber and the other is in communication with the inner chamber.

One of the high-pressure side and the low-pressure side is communicated with the bottom of the outer-layer accommodating chamber through a first pressure guide pipe, and the other one of the high-pressure side and the low-pressure side is communicated with the bottom of the inner-layer accommodating chamber through a second pressure guide pipe;

the connecting pipe, the communicating pipe, the first pressure guide pipe and the second pressure guide pipe are all provided with control valves.

The gas-liquid separator also comprises a separation baffle, and a gas-liquid mixing inlet, a gas outlet and a liquid outlet are arranged on the side wall of the separator body;

the gas-liquid mixing inlet, the gas outlet and the liquid outlet are communicated with the cavity, the gas outlet is located at the top of the separator body, and the liquid outlet is located at the bottom of the separator body.

Further, the separation baffle is positioned between the gas-liquid mixing inlet and the liquid outlet;

the separation baffle comprises at least two partition plates, the at least two partition plates are erected at the bottom of the cavity at intervals and divide the cavity into at least three chambers.

Further, the at least two partition plates comprise a first partition plate and a second partition plate;

the first partition plate is close to the gas-liquid mixing inlet, the height of the first partition plate is higher than that of the second partition plate, and a flow guide hole is formed in the lower portion of the first partition plate.

Further, the separating baffle comprises a first baffle, a second baffle and two lateral sealing plates;

the first baffle and the second baffle are arranged at intervals along the vertical direction to form a gap, the first baffle is close to the gas-liquid mixing inlet relative to the second baffle, part of the first baffle is positioned above the liquid level in the cavity, and the second baffle is positioned above the liquid level;

the upper end of the second baffle is connected with the inner wall of the separator body, and each lateral sealing plate is connected with the inner wall and the first baffle.

Further, the gas-liquid separator further includes: a submerged orifice plate;

the submerged pore plate is located on one side, away from the second baffle, of the first baffle and below the liquid level, and the submerged pore plate is connected with the inner wall of the separator body.

Further, the distance between the lower end of the first baffle and the liquid level in the cavity is in the range of [150mm,200mm ];

the distance between the upper end of the second baffle and the liquid level is more than 150mm.

Furthermore, the number of the gas-liquid mixing inlets is at least one, and the gas-liquid mixing inlets are positioned above the liquid level;

an included angle is formed between the axis of the gas-liquid mixing inlet and the horizontal line, and the included angle ranges from [30 degrees to 45 degrees ].

The gas-liquid separator for hydrogen production provided by the utility model has the following advantages:

the separator provided by the utility model has the advantages that the separator body is connected with the differential pressure transmitter through the double-chamber balance container, the differential pressure transmitter can measure the differential pressure of the double-chamber balance container, and the double-chamber balance container can accurately convert the differential pressure and the liquid level in the separator body, so that the liquid level in the separator body can be accurately obtained; in addition, the temperatures of the inner container chamber and the outer container chamber in the double-chamber balance container are basically equal, so that the measurement error caused by different temperatures can be reduced, and the measurement precision of the liquid level is further improved.

In a second aspect, the utility model provides a hydrogen production system by electrolyzing water, which comprises the separator.

The advantages of the water electrolysis hydrogen production system are the same as those of the separator, and the description is omitted.

Drawings

Fig. 1 is a schematic structural diagram of a gas-liquid separator according to an embodiment of the present invention at a first viewing angle;

fig. 2 is a schematic structural diagram of a gas-liquid separator according to an embodiment of the present invention at a second viewing angle;

fig. 3 is a second schematic structural view of the gas-liquid separator according to the embodiment of the present invention at a first viewing angle;

fig. 4 is a second schematic structural view of a gas-liquid separator according to a second embodiment of the present invention at a second viewing angle.

Fig. 5 is a partial structural schematic diagram of a gas-liquid separator according to an embodiment of the present disclosure at a first viewing angle.

Description of reference numerals:

1: a separator body; 11: a gas-liquid mixing inlet; 12: an air outlet; 13: a liquid outlet;

2: a dual chamber equalization vessel; 21: an inner chamber; 22: an outer chamber;

3: a differential pressure transmitter;

4: separating the baffle plate; 410: a first separator; 411: a flow guide hole; 412: a second separator; 43: a first baffle plate; 44: a second baffle; 441: a vertical portion; 442: a bending section; 45: a lateral closing plate; 451: bending the section; 452: a first horizontal segment; 453: a vertical section; 454: a second horizontal segment; 455: an arc-shaped section; 46: a submerged orifice plate;

5: a connecting pipe; 6: a communicating pipe; 7: a stabilizer tube; 8: a first pressure pipe; 9: a second pressure pipe; 10: a control valve; 20: the liquid level.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The terms "first," "second," and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention may be practiced in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The separator for hydrogen production and the water electrolysis hydrogen production system provided by the embodiment of the present invention are described in detail by referring to fig. 1 to fig. 4 through specific embodiments and application scenarios thereof.

The embodiment of the utility model provides a vapour and liquid separator for hydrogen manufacturing, vapour and liquid separator specifically can include: the device comprises a separator body 1, at least one double-chamber balance container 2 and a differential pressure transmitter 3, wherein the separator body 1 is provided with a cavity; the double-chamber balancing container 2 comprises an inner chamber 21 and an outer chamber 22, the volume of the inner chamber 21 is smaller than that of the outer chamber 22, and the inner chamber 21 is positioned in the outer chamber 22; the outer layer containing chamber 22 is communicated with the cavity through a connecting pipe 5, the connecting pipe 5 is positioned above the liquid level 20 of liquid in the cavity, the inner layer containing chamber 21 is communicated with the cavity through a communicating pipe 6, and the communicating pipe 6 is positioned below the liquid level 20; a differential pressure transducer 3 communicates with a dual chamber equalization vessel 2. It can be seen that, in the present embodiment, the separator body 1 is connected to the differential pressure transmitter 3 through the dual-chamber balance container 2, the differential pressure transmitter 3 can measure the differential pressure of the dual-chamber balance container 2, and the dual-chamber balance container 2 can accurately convert the differential pressure and the liquid level 20 in the separator body 1, so as to accurately obtain the liquid level 20 in the separator body 1; moreover, the temperatures of the inner chamber 21 and the outer chamber 22 in the dual-chamber equilibrium container 2 are substantially equal, so that the measurement error caused by the difference of the temperatures can be reduced, and the measurement accuracy of the liquid level 20 can be further improved.

Specifically, as shown in fig. 2 and 4, the gas-liquid separator is placed horizontally, and the separator body 1 of the gas-liquid separator has a cavity in which a liquid (such as an alkali solution) is contained. The number of the double-chamber balance containers 7 is at least one, the number of the differential pressure transmitters 8 corresponds to that of the double-chamber balance containers 7 one by one, and the specific setting number of the double-chamber balance containers 7 and the differential pressure transmitters 8 can be set according to actual conditions without limitation in the embodiment. The following description will be given by way of example of a two-chamber equalization vessel 7 and a differential pressure transmitter 8.

Specifically, as shown in fig. 1, the dual-chamber balancing container 2 includes an inner chamber 21 and an outer chamber 22, the outer chamber 22 has a larger volume than the inner chamber 21, and the inner chamber 21 is located inside the outer chamber 22. The outer-layer containing chamber 22 is communicated with the cavity of the separator body 1 through a connecting pipe 5, the connecting pipe 5 is positioned above the liquid level 20, the inner-layer containing chamber 21 is communicated with the cavity of the separator body 1 through a communicating pipe 6, and the communicating pipe 6 is positioned below the liquid level 20.

As shown in fig. 1, the positive pressure head of the dual-chamber equalization container 2 is led out from the outer chamber 22, and the negative pressure head of the dual-chamber equalization container 2 is led out from the inner chamber 21. The differential pressure transmitter 3 has a high pressure side (H) and a low pressure side (L), one of the high pressure side and the low pressure side is communicated with a positive pressure head at the bottom of the outer-layer accommodating chamber 22, and the other is communicated with a negative pressure head at the bottom of the inner-layer accommodating chamber 21, so as to detect the differential pressure of the dual-chamber balance container 2.

In practice, the differential pressure transmitter 3 includes a negative-transition differential pressure transmitter 3 and a positive-transition differential pressure transmitter 3, as shown in fig. 1, when the differential pressure transmitter 3 is a negative-transition differential pressure transmitter, the high pressure side thereof is communicated with the bottom of the inner chamber 21, and the low pressure side thereof is communicated with the bottom of the outer chamber 22; when the differential pressure transmitter 3 is a positive-migration differential pressure transmitter, the low-pressure side thereof is communicated with the bottom of the inner chamber 21, and the high-pressure side thereof is communicated with the bottom of the outer chamber 22; the type of the differential pressure transmitter 3 is not limited in this embodiment, and may be set according to actual conditions. It should be noted that, the communication between the differential pressure transmitter 3 and the dual-chamber equilibrium container 2 may be a conventional communication method of other related technologies besides the above communication method, and reference may be made to related technologies, which are not described herein again.

As shown in fig. 1, the outer chamber 22 is in gas communication with the separator body 1 and is filled with condensed water; the inner chamber 21 communicates with the liquid phase of the separator body 1 and forms a communicating vessel. In practice, the water level in the outer chamber 22 is constant, and when the water level increases, the water flows into the separator body 1 through the connecting pipe 5, and when the water level decreases, the water is replenished with condensed water. Thus, as long as the water in the outer compartment 22 has a constant gravity (or density), the positive head pressure becomes constant, that is, the negative head pressure changes, i.e., the pressure differential output from the dual chamber equalization vessel 2 changes, reflecting the liquid level 20 within the separator body 1.

When the liquid level 20 in the separator body 1 changes, the pressure difference output by the double-chamber balance container 2 also changes linearly along with the liquid level, the pressure difference transmitter 3 acquires a pressure difference signal in real time, and the double-chamber balance container 2 can accurately convert the pressure difference and the liquid level 20 in the separator body 1, so that the liquid level 20 of the separator body 1 is accurately acquired; and because the temperatures of the inner chamber 21 and the outer chamber 22 in the dual-chamber equilibrium container 2 are basically equal, the measurement error caused by different temperatures can be reduced, so as to further improve the measurement accuracy of the liquid level 20.

In a preferred embodiment, the number of the differential pressure transmitter 3 and the dual chamber balance container 2 is two, so that the differential pressure obtained by the two differential pressure transmitters 3 can be averaged or calculated by means of weighted average, and converted into the liquid level 20, so as to make the measurement of the liquid level 20 more accurate.

In the embodiment of the present invention, as shown in fig. 1, the gas-liquid separator further includes: a stabilizer tube 7; the stabilizing pipe 7 is arranged in the cavity along the vertical direction; the part of the connecting pipe 5 and the part of the communicating pipe 6 both extend into the cavity, and one end of the connecting pipe 5 in the cavity and one end of the communicating pipe 6 in the cavity are respectively communicated with the stabilizing pipe 7.

Specifically, as shown in fig. 1, the stabilizing pipe 7 is a vertical pipe, the portion of the connecting pipe 5 and the portion of the communicating pipe 6 both extend into the cavity, one end of the connecting pipe 5 located in the cavity is communicated with the stabilizing pipe 7, and one end of the communicating pipe 6 located in the cavity is communicated with the stabilizing pipe 7. In this way, the stabilizing pipe 7 can stabilize the communicating pipe 6 and the connecting pipe 5, so as to stabilize the liquid level 20 in the dual-chamber equilibrium container 2, and further improve the measurement accuracy of the liquid level 20 in the separator body 1.

In the embodiment of the present invention, as shown in fig. 1, one of the high-pressure side and the low-pressure side of the differential pressure transmitter 3 is communicated with the bottom of the outer chamber 22 through a first pressure pipe 8, and the other is communicated with the bottom of the inner chamber 21 through a second pressure pipe 9; and the connecting pipe 5, the communicating pipe 6, the first pressure guide pipe 8 and the second pressure guide pipe 9 are all provided with a control valve 10.

Specifically, as shown in fig. 1, the low pressure side of the differential pressure transmitter 3 communicates with the positive pressure head at the bottom of the outer chamber 22 through the first pressure pipe 8, and the high pressure side of the differential pressure transmitter 3 communicates with the negative pressure head at the bottom of the inner chamber 21 through the second pressure pipe 9. The communicating pipe 6, the first pressure pipe 8 and the second pressure pipe 9 are all provided with control valves 10, and for the connecting pipe 5, the control valves 10 can be ball valves to cut off or conduct the flow of gas in the connecting pipe 5; for the communicating pipe 6, the control valve 10 can be a ball valve to cut off or communicate the flow of the liquid in the communicating pipe 6; for the first/second pressure guiding pipe, the control valve 10 may be a ferrule needle valve to disconnect or connect the negative/positive pressure side volume chamber of the differential pressure transmitter 3.

In the embodiment of the present invention, as shown in fig. 2 and 3, the gas-liquid separator further includes a separation baffle 4, and a gas-liquid mixing inlet 11, a gas outlet 12 and a liquid outlet 13 are disposed on the sidewall of the separator body 1; the gas-liquid mixing inlet 11, the gas outlet 12 and the liquid outlet 13 are all communicated with the cavity, the gas outlet 12 is positioned at the top of the separator body 1, and the liquid outlet 13 is positioned at the bottom of the separator body 1.

Specifically, a gas-liquid mixture enters the cavity of the separator body 1 from the gas-liquid mixing inlet 11, the separation baffle 4 is used for separating gas and liquid in the gas-liquid mixture, the separated gas flows out from the gas outlet 12, and the liquid flows out from the liquid outlet 13. In practice, the gas outlet 12 and the liquid outlet 13 may be disposed opposite to each other, so that the gas in the liquid is prevented from flowing out of the liquid outlet 13 along with the liquid by the highest liquid level difference, so that the separated gas can flow out of the gas outlet 12.

In an alternative embodiment of the present invention, as shown in fig. 2, the separation baffle 4 is located between the gas-liquid mixing inlet 11 and the liquid outlet 13; the separating baffle 4 comprises at least two clapboards which stand at the bottom of the cavity at intervals and divide the cavity into at least three chambers.

Particularly, separation baffle 4 includes two piece at least baffles, and two piece at least baffles intervals stand in the bottom of cavity, that is to say, each baffle sets up along vertical direction, and the bottom mounting of each baffle is in the bottom of cavity. Figure 2 shows two baffles which divide the chamber into three chambers.

In some embodiments, as shown in FIG. 2, the at least two baffles include a first baffle 410 and a second baffle 412; the first barrier 410 is adjacent to the gas-liquid mixing inlet 11, the height of the first barrier 410 is higher than that of the second barrier 412, and a flow guide hole 412 is formed in the lower portion of the first barrier 410.

Specifically, as shown in fig. 2, in the left-to-right direction, the first partition 410 and the second partition 412 divide the cavity into a coarse separation chamber, a fine separation chamber, and a clean chamber. The gas-liquid mixing inlet 11 is positioned on the side wall on the left side of the coarse separation chamber and is positioned in the middle area of the left side wall; the air outlet 12 is located on the upper side wall of the clean room, and the liquid outlet 13 is located on the lower side wall of the clean room. In practice, the first partition 410 has a height above the liquid level 20 in the separator body 1, and the second partition 412 has a height slightly below the liquid level 20.

The separation steps of the separation baffle 4 in fig. 2 are as follows: the gas-liquid mixture enters the coarse separation chamber from the gas-liquid mixing inlet 11, part of kinetic energy of the gas-liquid mixture is eliminated after the gas-liquid mixture collides with the first partition plate, in the coarse separation chamber, the gas overflows upwards from the liquid level due to large specific gravity difference between the gas and the liquid, so that the gas content in the lower part of the liquid is greatly reduced, and the coarsely separated liquid flows into the fine separation chamber from the flow guide hole 411 in the lower part of the first partition plate 410; in the fine separation chamber, a small amount of gas in the liquid continues to separate the liquid, and after the separation of the two chambers, the liquid without free gas passes through the upper part of the second partition plate 412 and enters the purifying chamber, and the liquid outlet 13 is arranged at the bottom of the purifying chamber, so that the gas in the liquid is prevented from flowing out of the liquid outlet 13 along with the liquid, and the separated gas can flow out of the gas outlet 12.

In another alternative embodiment of the present invention, as shown in fig. 3, the separating baffle 4 comprises a first baffle 43, a second baffle 44 and two lateral closing plates 45; the first baffle 43 and the second baffle 44 are arranged at intervals along the vertical direction to form a gap, the first baffle 43 is close to the gas-liquid mixing inlet 11 relative to the second baffle 44, part of the first baffle 43 is positioned above the liquid level 20 in the cavity, and the second baffle 44 is positioned above the liquid level 20; the upper end of the second baffle 44 is connected to the inner wall of the separator body 1, and each lateral sealing plate 45 is connected to the inner wall of the separator body 1 and to the first baffle 43.

In the related art, the gas-liquid mixing inlet is located below the liquid level, however, since the separated alkali liquor is usually pumped out by the circulating pump and returned to the electrolytic tank, a small amount of separated gas may be pumped out in the process, so that the total amount of the separated gas is reduced, and the pressure in the gas-liquid separator is unstable.

In practice, the number of the gas-liquid mixing inlets 11 is at least one, and as shown in fig. 3, the gas-liquid mixing inlets 11 may be located above the liquid level 20 in the cavity, so that a small amount of separated gas may be prevented from being pumped away by the circulation pump, so that the separated gas may flow out from the gas outlet 12, the total amount of the separated gas is ensured, and the pressure in the gas-liquid separator is maintained constant. An included angle is formed between the axis of the gas-liquid mixing inlet 11 and the horizontal line, and the included angle ranges from 30 degrees to 45 degrees. The specific number and angle of the gas-liquid mixing inlets 11 are not limited in this embodiment, and need to be set according to actual requirements. The number of gas-liquid mixtures is explained below as one.

Specifically, as shown in fig. 3, the first baffle 43 and the second baffle 44 are disposed at an interval in the vertical direction, and the first baffle 43 is located close to the gas-liquid mixture inlet 11 with respect to the second baffle 44 to form a gap. The first baffle 43 is located partly above the liquid level 20 and partly below the liquid level 20, and the second baffle 44 is located above the liquid level 20.

In some embodiments, two lateral sealing plates 45 are located on both sides of the first baffle plate 43 in the length direction of the separator body 1, two lateral sealing plates 45 are connected to the inner wall of the separator body 1, one lateral sealing plate 45 is connected to one end of the first baffle plate, and the other lateral sealing plate 45 is connected to the other end of the first baffle plate 43, so that the lateral sealing plates 45 can support the first baffle plate 43.

In other embodiments, referring to fig. 1, 2 to 5, in the length direction of the separator body 1, one lateral closing plate 45 is connected to the inner wall of the separator body 1 and closes the openings formed by the first baffle 43 and the second baffle 44, respectively, and similarly, the other lateral closing plate 45 is connected to the inner wall of the separator body 1 and closes the openings formed by the first baffle 43 and the second baffle 44, respectively, to the inner wall. In this way, the lateral sealing plate 45 not only can support the first baffle 43, but also can form a semi-closed cavity with the first baffle 43, the second baffle 44 and the inner wall of the separator body 1, so that all the gas in the gas-liquid mixture entering from the gas-liquid mixing inlet 2 can flow upwards through the gap between the first baffle 43 and the second baffle 44.

As shown in fig. 3 to 5, the first baffle 43 has a flat plate structure; the second baffle 44 includes a vertical portion 441 and a bent portion 442 connected to each other, a predetermined included angle is formed between the vertical portion 441 and the bent portion 442, the vertical portion 441 is disposed along a vertical direction and is close to the inner wall of the cavity relative to the bent portion 442, and an end of the vertical portion 441 away from the bent portion 442 is connected to the inner wall of the cavity. The angle of the preset included angle may be an acute angle or an obtuse angle, and the preset included angle is preferably an obtuse angle with reference to the opening of the second baffle 44 facing the first baffle 43.

In some embodiments, the second baffle 44 may have a flat plate structure in addition to the above-mentioned bent plate structure, in which case, the second baffle 44 only includes the upright portion 521, and the upper end of the upright portion 521 is connected with the inner wall of the cavity.

As shown in fig. 5, in the counterclockwise direction, the lateral sealing plate 45 includes a bending section 451, a first horizontal section 452, a vertical section 453, a second horizontal section 454 and an arc-shaped section 455, which are connected end to end, and it can be seen that the shape of the lateral sealing plate 45 is irregular. Wherein the shape of the bent section 451 is similar to or the same as that of the second baffle 44, and the shape of the arc-shaped section 455 is similar to or the same as that of a part of the inner wall of the separator body 1 (the inner wall between the upper end of the second baffle 44 to the lower end of the first baffle 43). In practice, the cross-sectional area of the lateral sealing plate 45 is greater than or equal to the area of the opening, the area of the lateral sealing plate 45 shown in fig. 5 is greater than the area of the opening, if the area of the lateral sealing plate 45 is equal to the area of the opening, the bent section 451 is flush with the end of the second baffle plate 44, the vertical section 453 is flush with the end of the first baffle plate 43, the first horizontal section 452 is the gap between the first baffle plate 43 and the second baffle plate 44, and the second horizontal section 454 is equivalent to the distance between the lower end of the first baffle plate 43 and the inner wall of the separator body 1.

As shown in fig. 5, the first baffle 43, the second baffle 44, the lateral sealing plate 45 and the inner wall (arc segment 455) of the separator body 1 form a semi-closed cavity, as shown in fig. 1, in the case that the gas-liquid mixture inlet 11 is located above the liquid level 20, when the gas-liquid mixture enters the cavity of the separator body 1 from the gas-liquid mixture inlet 11, the gas first collides with the first baffle 43, so that not only the flow rate of the gas-liquid mixture is reduced, but also the gas in the gas-liquid mixture flows upward due to the density difference between the gas and the liquid in the gas-liquid mixture, as shown in fig. 3, and turns from the opening between the upper end of the first baffle 43 and the inner wall of the cavity into the gap W1 (W1 refers to the width of the gap), and then turns and flows upward; liquid in the gas-liquid mixture can fall into the liquid in the cavity through the third gap due to the dead weight so as to realize the separation of the gas-liquid mixture.

In some embodiments, as shown in fig. 1, the upper end of the first baffle 43 is positioned between the upper end of the second baffle 44 and the lower end of the second baffle 44 so that the upwardly flowing gas can be diverted and enter the gap, thereby reducing the flow rate of the gas. Of course, the upper end of the first baffle 43 may be flush with the lower end of the second baffle 44, and the specific installation position of the first baffle 43 may be set according to actual conditions. The upper end of the first shutter 43 is positioned between the upper end of the second shutter 44 and the lower end of the second shutter 44. A lateral closing plate 45 connects the lower end of the second shutter 44 with the first shutter 43 to close the gap between the lower end of the second shutter 44 and the first shutter 43.

In some embodiments, the flow velocity of the gas in W1 should be no higher than 0.2m/s, based on which, in conjunction with FIGS. 3 and 4, the length W of the lateral sealing plate 45 in the axial direction of the separator body 1 (as shown in FIG. 4) can be calculated from the gas volume flow/(W1W). Ltoreq.0.2 m/s, wherein the gas volume flow is known.

It is noted that, as shown in fig. 3 to 5, since the gas-liquid mixture port 11 is located above the liquid level 17 in the chamber of the gas-liquid separator, and the separation baffle 4 is used to separate the gas-liquid mixture entering the chamber from the gas-liquid mixture inlet 2. The structure can ensure that the gas and electrolyte mist mixture has time to escape before reaching the surface of the electrolyte in the gas-liquid separator from the gas-liquid mixing inlet, reduce the contact time with the electrolyte solution and further improve the gas-liquid separation performance in the gas-liquid separator.

As shown in fig. 3, the gas-liquid separator further includes: a submerged orifice plate 46; the submerged orifice 46 is located on the side of the first baffle 43 away from the second baffle 44 and below the liquid level 20, and the submerged orifice 46 is connected with the inner wall of the separator body 1.

In practice, in the case that the gas-liquid mixture inlet 11 is located on the liquid, the liquid level fluctuates due to the large flow rate of the gas-liquid mixture entering the cavity, and in order to balance the gas load below the liquid level and stabilize the liquid level, so as to reduce the gas carrying water, the submerged orifice plate 46 is provided in the present embodiment. In some embodiments, as shown in fig. 3, the submerged orifice plate 46 is located below the liquid level 20 and on a side of the first baffle 43 remote from the second baffle 44, i.e., the submerged orifice plate 46 is located between the first baffle 43 and the inner wall of the chamber, and the submerged orifice plate 46 may be horizontally positioned to connect the inner wall of the separator body 1 with the first baffle 43. In fig. 3, one end of the submerged orifice plate 46 far away from the first baffle 43 is fixedly connected with the inner wall of the separator body 1, and one end of the submerged orifice plate 46 near the first baffle 43 is fixedly connected with the lower end of the first baffle 43. In other embodiments, the end of the submerged orifice plate 46 near the first baffle 43 may not be connected to the lower end of the first baffle 43. It should be noted that the submerged hole plate 46 may also be placed obliquely with respect to the first baffle 43, and the specific placement manner of the submerged hole plate 46 may not be limited in this embodiment, and may be specifically limited according to actual situations.

Specifically, the submerged orifice plate 46 is provided with a plurality of orifices which are uniformly distributed and have a throttling function, so that gas can be uniformly distributed, local load concentration is avoided, and the gas flow rate is reduced, so that fluctuation of a gas-liquid mixture on the liquid level 20 during feeding is reduced; also, the plurality of perforations also facilitate gravity separation, and when the air stream passes through the perforations, water droplets entrained in the air stream can attach to the face of the submerged orifice plate 46 and fall under their own weight into the liquid in the chamber.

It should be noted that, as shown in fig. 3, if the submerged orifice plate 46 is horizontally disposed, the submerged orifice plate 46 may be regarded as the second horizontal section 454 of the lateral sealing plate 45, or the second horizontal section 454 is the submerged orifice plate 46, and the structure of the second horizontal section 454 is the same as that of the submerged orifice plate 46.

Specifically, first baffle 43, second baffle 44, side direction shrouding 45 and submerged orifice plate 46 can be the integrated into one piece structure, and like this, the structure of separation baffle 4 is more stable, intensity is higher, has improved the life of separation baffle 4 to improve the life of separator.

As shown in FIG. 3, the distance between the lower end of the first baffle 43 and the liquid level 20 is in the range of [150mm,200mm ]; the distance between the upper end of the second baffle 44 and the liquid level 20 is greater than 150mm. The specific values of the distance between the lower end of the first baffle 43 and the liquid level 20 and the distance between the upper end of the second baffle 44 and the liquid level 20 are not limited in this embodiment, and may be set according to actual conditions.

In fact, first baffle 43 can set up the strengthening rib on the surface towards gas-liquid mixture import 11, and the strengthening rib can form the structure of guiding gutter with first baffle 43, and the strengthening rib also can be stainless wire net, and to the concrete structure of strengthening rib, this embodiment can not do the restriction to this, specifically can set for according to actual demand. In addition, in order to prevent the liquid (such as lye) in the separator body 1 from corroding the reinforcing bars, the surfaces of the reinforcing bars contain corrosion-resistant materials. For example, the reinforcing bars themselves may be of a corrosion resistant material, or the reinforcing bars themselves may not have corrosion resistant properties, and a corrosion resistant coating may be applied to the surface of the reinforcing bars.

The embodiment of the utility model provides a vapour and liquid separator for hydrogen manufacturing has following advantage:

the utility model provides a gas-liquid separator, through two rooms balance container 2 with separator body 1 with differential pressure transmitter 3 be connected, the pressure difference of two rooms balance container 2 that differential pressure transmitter 3 can measure, and two rooms balance container 2 can be with pressure difference and the liquid level 20 accurate conversion in separator body 1 to accurately obtain the liquid level 20 in separator body 1; moreover, the temperatures of the inner container 21 and the outer container 22 in the dual-chamber balance container 2 are substantially equal, so that the measurement error caused by different temperatures can be reduced, and the measurement accuracy of the liquid level 20 can be further improved.

The embodiment of the utility model provides an electrolytic water hydrogen manufacturing system still is provided, specifically can include above-mentioned separator.

In practice, the system for producing hydrogen by electrolyzing water further comprises an electrolytic cell, and the electrolytic cell is used for alkaline water electrolysis. The electrolytic cell is not particularly limited, and may be a monopolar electrolytic cell or a bipolar electrolytic cell, but a bipolar electrolytic cell is industrially preferred. The bipolar cell is constructed by stacking the desired number of bipolar elements, preferably from 50 to 500, more preferably from 70 to 300, and particularly preferably from 200 to 300. In the alkaline water electrolysis system, the gas-liquid separator is a hydrogen gas-liquid separator or an oxygen gas-liquid separator, and the hydrogen gas-liquid separator and the oxygen gas-liquid separator are communicated with the electrolytic bath and are arranged above the electrolytic bath side by side. The hydrogen production device also comprises a hydrogen scrubber and an oxygen scrubber which are respectively arranged above the hydrogen gas-liquid separator and the oxygen gas-liquid separator and used for scrubbing the gas discharged by the gas-liquid separator.

In practice, the circulating lye (e.g. 30% KOH) is passed through an electrolytic cell, the cathode of which discharges a gas-liquid mixture of hydrogen (H2) and alkali mist, after which the hydrogen is separated from the alkali mist by means of a gas-liquid separator; discharging a gas-liquid mixture of oxygen (O2) and the alkali mist from the anode, and then separating the oxygen from the alkali mist through another gas-liquid separator; the separated alkali liquor is gathered and enters an alkali liquor cooler and returns to the electrolytic cell through a circulating pump. The utility model discloses a vapour and liquid separator has excellent gas-liquid separation efficiency, is particularly suitable for using with large-scale alkaline water electrolysis groove is supporting, has efficient gas-liquid handling capacity.

The advantages of the water electrolysis hydrogen production system are the same as those of the gas-liquid separator, and the description is omitted here.

The above description is for illustrative purposes only and is not intended to be limiting, and the present invention is not limited to the above embodiments, and many modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

Claims (12)

1. A gas-liquid separator for producing hydrogen, comprising: a separator body, at least one dual chamber equalization vessel, and a differential pressure transmitter, wherein the separator body has a cavity;

the double-chamber balance container comprises an inner chamber and an outer chamber, the volume of the inner chamber is smaller than that of the outer chamber, and the inner chamber is positioned in the outer chamber;

the outer-layer containing chamber is communicated with the cavity through a connecting pipe, the connecting pipe is positioned above the liquid level of liquid in the cavity, the inner-layer containing chamber is communicated with the cavity through a communicating pipe, and the communicating pipe is positioned below the liquid level;

one of the differential pressure transmitters is in communication with one of the dual chamber equalization vessels.

2. The gas-liquid separator for producing hydrogen as claimed in claim 1, further comprising: a stabilizer tube;

the stabilizing pipe is arranged in the cavity along the vertical direction;

the part of connecting pipe with the part of communicating pipe all stretches into in the cavity, just the connecting pipe is located one end in the cavity with communicating pipe is located one end in the cavity respectively with the stabilizator pipe intercommunication.

3. The gas-liquid separator for producing hydrogen of claim 1, wherein the differential pressure transmitter has a high pressure side and a low pressure side, one of the high pressure side and the low pressure side being in communication with the outer chamber and the other being in communication with the inner chamber.

4. The gas-liquid separator for hydrogen production according to claim 3, wherein one of the high-pressure side and the low-pressure side communicates with the bottom of the outer-layer containing chamber through a first pressure pipe, and the other communicates with the bottom of the inner-layer containing chamber through a second pressure pipe;

the connecting pipe, the communicating pipe, the first pressure guide pipe and the second pressure guide pipe are all provided with control valves.

5. The gas-liquid separator for producing hydrogen as claimed in any one of claims 1 to 4, further comprising a separation baffle, wherein a gas-liquid mixing inlet, a gas outlet and a liquid outlet are arranged on the side wall of the separator body;

the gas-liquid mixing inlet, the gas outlet and the liquid outlet are communicated with the cavity, the gas outlet is positioned at the top of the separator body, and the liquid outlet is positioned at the bottom of the separator body.

6. The gas-liquid separator for producing hydrogen as claimed in claim 5, wherein the separation baffle is located between the gas-liquid mixing inlet and the liquid outlet;

the separation baffle comprises at least two partition plates, the at least two partition plates are erected at the bottom of the cavity at intervals and divide the cavity into at least three chambers.

7. The gas-liquid separator for producing hydrogen according to claim 6, wherein the at least two separators comprise a first separator and a second separator;

the first partition plate is close to the gas-liquid mixing inlet, the height of the first partition plate is higher than that of the second partition plate, and a flow guide hole is formed in the lower portion of the first partition plate.

8. The gas-liquid separator for producing hydrogen as claimed in claim 5, wherein the separation baffle comprises a first baffle, a second baffle and two lateral seal plates;

the first baffle and the second baffle are arranged at intervals along the vertical direction to form a gap, the first baffle is close to the gas-liquid mixing inlet relative to the second baffle, part of the first baffle is positioned above the liquid level in the cavity, and the second baffle is positioned above the liquid level;

the upper end of the second baffle is connected with the inner wall of the separator body, and each lateral sealing plate is connected with the inner wall and connected with the first baffle.

9. The gas-liquid separator for producing hydrogen as claimed in claim 8, further comprising: a submerged orifice plate;

the submerged pore plate is located on one side, away from the second baffle, of the first baffle and located below the liquid level, and the submerged pore plate is connected with the inner wall of the separator body.

10. The gas-liquid separator for hydrogen production according to claim 8, wherein the distance between the lower end of the first baffle and the liquid level in the cavity is in the range of [150mm,200mm ];

the distance between the upper end of the second baffle and the liquid level is more than 150mm.

11. The gas-liquid separator for hydrogen production according to claim 5, wherein the number of the gas-liquid mixing inlet is at least one, and the gas-liquid mixing inlet is located above the liquid level;

an included angle is formed between the axis of the gas-liquid mixing inlet and the horizontal line, and the included angle ranges from [30 degrees to 45 degrees ].

12. A system for producing hydrogen by electrolyzing water, comprising the gas-liquid separator according to any one of claims 1 to 11.

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