Integrated alkaline water electrolysis hydrogen production and liquid separation device

Abstract

The utility model discloses an integrated alkaline water electrolysis hydrogen production gas-liquid separation device which comprises a gas-liquid separation structure, a gas washing structure and a gas condensation structure, and the gas output end of the gas-liquid separation structure is communicated with the gas condensation structure through the gas washing structure. The gas washing structure and the gas condensation structure are arranged on the gas-liquid separation structure; the gas washing structure comprises a gas washer, a washing gas inlet pipe, a gas connecting pipe, a washing gas outlet pipe, a gas distribution pipe and a washer wire mesh demister. The gas-liquid separation device has the advantages that the gas-liquid separation structure, the gas washing structure and the gas condensation structure are integrated, the processes of separation, washing and cooling can be completed in sequence, the process requirements are met, and the whole device is reasonable in arrangement, high in integration level, compact in structure and small in occupied area, and the space layout is reasonably utilized.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production, in particular to an integrated alkaline water electrolysis hydrogen production gas-liquid separation device. Background Art

[0002] As a clean and pollution-free energy with high calorific value, hydrogen has a place in the new energy industry. There are many ways to produce hydrogen, among which water electrolysis is the most important technology for producing high-purity hydrogen. In the water electrolysis hydrogen production technology, direct current is passed through an electrolytic cell filled with potassium hydroxide, and water molecules undergo electrochemical reactions on the electrodes, decomposing into hydrogen and oxygen. The electrolyte, hydrogen and oxygen need to be separated by a gas-liquid separator using the principle of different specific gravities of gas and liquid, and the gas after gas-liquid separation is cooled by a cooling device to finally obtain hydrogen.

[0003] With the rapid development of hydrogen energy, large-scale hydrogen production is the future development trend of hydrogen energy. Large-scale hydrogen production requires multiple large-scale water electrolysis hydrogen production equipment, and multiple large-scale water electrolysis hydrogen production equipment include many parts. In the existing water electrolysis hydrogen production equipment, during the installation process, the gas-liquid separator, gas scrubber and gas cooler need to be hoisted to the upper part of the alkali liquid circulation system skid. After the installation and piping are completed, they are sent to the equipment installation site in the form of loose parts, and then installed in place on site in the form of loose parts. This installation method of hoisting assembly, disassembly, freight and reassembly has caused great inconvenience to production and installation, and has caused the complexity and large-scale of water electrolysis hydrogen production equipment, bringing a series of problems such as land occupation, maintenance and economic benefits. Utility Model Content

[0004] The technical problem to be solved by the utility model is how to provide a gas-liquid separation device which is easy to install and occupies a small area.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] An integrated alkaline water electrolysis hydrogen production gas-liquid separation device, comprising a gas-liquid separation structure, a gas washing structure and a gas condensation structure, wherein the gas output end of the gas-liquid separation structure is connected to the gas condensation structure through the gas washing structure, and the gas washing structure and the gas condensation structure are both arranged on the gas-liquid separation structure;

[0007] The gas washing structure includes a gas scrubber, a washing air inlet pipe, a gas connecting pipe, a washing air outlet pipe, an air distribution pipe and a washing machine wire mesh demister. The gas scrubber is arranged on the gas-liquid separation structure. One end of the washing air inlet pipe is arranged inside the gas scrubber and connected to the gas connecting pipe, and the other end passes through the gas scrubber and the gas-liquid separation structure in sequence and extends into the inner cavity of the gas-liquid separation structure. One end of the washing air outlet pipe is connected to the gas connecting pipe, and the other end is connected to the air distribution pipe arranged at the bottom of the gas scrubber. The gas scrubber is provided with a washing water inlet and a washing air outlet. The washing machine wire mesh demister is arranged at the washing air outlet, and the washing air outlet is connected to the gas condensation structure.

[0008] By integrating the gas-liquid separation structure, gas washing structure and gas condensation structure into one, the separation, washing and cooling processes can be completed in sequence to meet the process requirements. The entire device setting makes reasonable use of the space layout, has a high degree of integration, a compact structure, and a small footprint. It can be produced and installed directly in the workshop, which provides convenience for production and manufacturing and later installation, and solves the problems of high-altitude operations during the production process and complicated operations caused by multiple hoisting during delivery and later on-site installation.

[0009] Preferably, the gas-liquid separation structure comprises a gas-liquid separator and a fixed saddle, and the gas-liquid separator is fixed on the fixed saddle; the gas-liquid separator is provided with a gas-liquid mixture inlet, an alkali liquid circulation inlet and an alkali liquid circulation outlet.

[0010] Preferably, the alkali solution circulation inlet is provided with an impact baffle.

[0011] Preferably, the alkali solution circulation outlet is provided with an anti-vortex plate.

[0012] Preferably, a liquid level meter is also provided on the gas-liquid separator.

[0013] Preferably, a differential pressure sensor is also provided on the gas-liquid separator.

[0014] Preferably, the gas condensation structure includes a gas condenser and a connecting saddle, the gas condenser is fixed to the gas-liquid separation structure through the connecting saddle, and the gas condenser is provided with a cold medium inlet, a cold medium outlet, a condensed gas inlet, and a condensed gas outlet, and the condensed gas inlet is connected to the washing outlet.

[0015] Preferably, a condenser wire mesh demister is also provided at the condensed gas outlet.

[0016] Preferably, the gas condenser is further provided with a condensation reflux port, and the condensation reflux port is connected with the inner cavity of the gas-liquid separation structure through a reflux pipe.

[0017] Preferably, the gas washing structure further comprises an overflow pipe, one end of which is arranged inside the gas scrubber, and the other end of which passes through the gas scrubber and the gas-liquid separation structure in sequence and extends into the inner cavity of the gas-liquid separation structure.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] By integrating the gas-liquid separation structure, gas washing structure and gas condensation structure into one, the separation, washing and cooling processes can be completed in sequence to meet the process requirements. The entire device setting makes reasonable use of the space layout, has a high degree of integration, a compact structure, and a small footprint. It can be produced and installed directly in the workshop, which provides convenience for production and manufacturing and later installation, and solves the problems of high-altitude operations during the production process and complicated operations caused by multiple hoisting during delivery and later on-site installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0021] Figure 2 A cross-sectional view of an embodiment of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the gas condensation structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0023] In order to facilitate those skilled in the art to understand the technical solution of the utility model, the technical solution of the utility model is further explained in conjunction with the drawings in the specification.

[0024] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically limited.

[0026] See also Figures 1 to 3This embodiment discloses an integrated alkaline water electrolysis hydrogen production gas-liquid separation device, including a gas-liquid separation structure 1, a gas washing structure 2 and a gas condensation structure 3, the gas output end of the gas-liquid separation structure 1 is connected to the gas condensation structure 3 through the gas washing structure 2, and the gas washing structure 2 and the gas condensation structure 3 are both fixed on the gas-liquid separation structure 1.

[0027] The gas-liquid separation structure 1 includes a gas-liquid separator 11, a fixed saddle 12, an anti-collision baffle 13, an anti-vortex plate 14, a liquid level meter 15 and a differential pressure sensor 16. The gas-liquid separator 11 is fixed on the fixed saddle 12, and the fixed saddle 12 is installed on the skid through the fixed saddle 12; the gas-liquid separator 11 is provided with a gas-liquid mixture inlet 101, an alkali liquid circulation inlet 102 and an alkali liquid circulation outlet 103, the gas-liquid mixture inlet 101 is used to pass the gas-liquid mixture, the alkali liquid circulation inlet 102 and the alkali liquid circulation outlet 103 are used to pass the alkali liquid and discharge the alkali liquid respectively, the alkali liquid circulation inlet 102 is provided with an anti-collision baffle 13, and the alkali liquid circulation outlet 103 is provided with an anti-vortex plate 14. The gas-liquid separator 11 is also provided with a liquid level meter 15 and a differential pressure sensor 16, which are used to detect the liquid level and pressure in the gas-liquid separator 11.

[0028] The gas washing structure 2 includes a gas scrubber 21, a washing air inlet pipe 22, a gas connecting pipe 23, a washing air outlet pipe 24, an air distribution pipe 25, a scrubber wire mesh demister 26 and an overflow pipe 27. The gas scrubber 21 is fixed on the gas-liquid separator 11. One end of the washing air inlet pipe 22 is arranged inside the gas scrubber 21 and connected to the gas connecting pipe 23, and the other end passes through the gas scrubber 21 and the gas-liquid separator 11 in sequence and extends into the inner cavity of the gas-liquid separator 11. One end of the washing air outlet pipe 24 is connected to the gas connecting pipe 23, and the other end is connected to the air distribution pipe 25 arranged at the bottom of the gas scrubber 21. The air distribution pipe 25 is provided with an array of openings. The gas scrubber 21 is provided with a washing water inlet 201 and a washing air outlet 202. The scrubber wire mesh demister 26 is arranged at the washing air outlet 202 for removing foam impurities in the gas. The washing air outlet 202 is connected to the air inlet of the gas condensation structure 3.

[0029] One end of the overflow pipe 27 is disposed inside the gas scrubber 21 , and the other end thereof sequentially passes through the gas scrubber 21 and the gas-liquid separator 11 and extends below the working liquid level in the inner cavity of the gas-liquid separator 11 .

[0030] Specifically, deionized water enters the gas scrubber 21 from the washing water inlet 201, and the liquid level of the gas scrubber 21 continues to rise with the entry of deionized water. When the liquid level is higher than the mouth of the overflow pipe 27, the deionized water overflows into the gas-liquid separator 11, ensuring the liquid level balance in the gas scrubber 21 and forming a bubbling environment for hydrogen or oxygen washing.

[0031] The gas condensation structure 3 includes a gas condenser 31, a connecting saddle 32, a condenser wire mesh demister 33, and a reflux pipe 34. The gas condenser 31 is fixed on the gas-liquid separator 11 through the connecting saddle 32. The gas condenser 31 is provided with a cold medium inlet 301, a cold medium outlet 302, a condensed gas inlet 303, a condensed gas outlet 304, and a condensation reflux port 305. The cold medium inlet 301 is arranged close to the condensed gas outlet 304, and the cold medium outlet 302 is arranged close to the condensed gas outlet 304. A condensation gas inlet 303 is provided to realize countercurrent heat exchange; the condensed gas inlet 303 is connected to the washing outlet 202, and a condenser wire mesh demister 33 is provided at the condensed gas outlet 304 to filter impurities in the condensed gas; one end of the reflux pipe 34 is connected to the condensation reflux port 305, and the other end passes through the gas-liquid separator 11 and extends below the working liquid level in the inner cavity of the gas-liquid separator 11, so that the condensed liquid in the gas condenser 31 flows back to the gas-liquid separator 11 through the reflux pipe 34.

[0032] Furthermore, the scrubber outlet 202 and the condensed gas outlet 304 are both provided with scrubber loading and unloading ports (not marked in the figure) to facilitate replacement of the wire mesh of the scrubber wire mesh demister 26 and the condenser wire mesh demister 33.

[0033] The working process of this embodiment is: first, the gas-liquid mixture of alkali liquid and hydrogen or oxygen produced by the alkaline electrolytic cell passes through the gas-liquid mixture inlet 101, and the hydrogen or oxygen is separated from the alkali liquid by utilizing the different densities. The separated alkali liquid is circulated through the alkali liquid circulation inlet 102 and the alkali liquid circulation outlet 103, and the hydrogen or oxygen enters the gas scrubber 21 through the washing air inlet pipe 22.

[0034] At the same time, deionized water enters the gas scrubber 21 from the washing water inlet 201. The liquid level of the gas scrubber 21 continues to rise with the entry of deionized water. When the liquid level is higher than the mouth of the overflow pipe 27, the deionized water overflows into the gas-liquid separator 11, ensuring the liquid level balance in the gas scrubber 21 and forming a bubbling environment for hydrogen or oxygen washing.

[0035] Hydrogen or oxygen enters from the bottom of the washing inlet pipe 22 and continues to rise, enters the washing outlet pipe 24 through the gas connecting pipe 23 and descends to the gas distribution pipe 25. At this time, the gas continuously bubbles through the array openings set on the gas distribution pipe 25. After rising, it passes through the washing area filled with deionized water and the washing device wire mesh demister 26, and enters the gas condenser 31 from the washing outlet 202 and the condensed gas inlet 303 in turn for cooling.

[0036] Then, the cold medium is chilled water at 7°C (if the condensed gas is oxygen, the cold medium can be cooling water at 32°C), enters the pipe process from the cold medium inlet 301, exchanges heat with the gas in the gas condenser 31 in countercurrent, and returns to the cooling system from the cold medium outlet 302; hydrogen or oxygen passes through the condenser wire mesh demister 33 and the condensed gas outlet 304 after heat exchange, and enters the downstream discharge pipeline, measurement pipeline, purification pipeline, etc. The condensed liquid in the gas condenser 31 flows back to the gas-liquid separator 11 through the reflux pipe 34.

[0037] In this embodiment, the gas-liquid separation structure 1, the gas washing structure 2 and the gas condensation structure 3 are integrated into one, so that the separation, washing and cooling processes can be completed in sequence to meet the process requirements. The entire device arrangement reasonably utilizes the spatial layout, has a high degree of integration, a compact structure, and a small footprint. It can be directly produced and installed in the workshop, which provides convenience for production and manufacturing and later installation, and solves the problems of high-altitude operations during the production process and complicated operations caused by multiple hoisting during delivery and later on-site installation.

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0039] The above-described embodiments merely represent implementation methods of the utility model, and the protection scope of the utility model is not limited to the above-described embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the utility model, and all of these belong to the protection scope of the utility model.

Claims

1. An integrated alkaline water electrolysis hydrogen production gas-liquid separation device, characterized in that: It includes a gas-liquid separation structure, a gas washing structure and a gas condensation structure, wherein the gas output end of the gas-liquid separation structure is connected with the gas condensation structure through the gas washing structure, and the gas washing structure and the gas condensation structure are both arranged on the gas-liquid separation structure; The gas washing structure includes a gas scrubber, a washing air inlet pipe, a gas connecting pipe, a washing air outlet pipe, an air distribution pipe and a washing machine wire mesh demister. The gas scrubber is arranged on the gas-liquid separation structure. One end of the washing air inlet pipe is arranged inside the gas scrubber and connected to the gas connecting pipe, and the other end passes through the gas scrubber and the gas-liquid separation structure in sequence and extends into the inner cavity of the gas-liquid separation structure. One end of the washing air outlet pipe is connected to the gas connecting pipe, and the other end is connected to the air distribution pipe arranged at the bottom of the gas scrubber. The gas scrubber is provided with a washing water inlet and a washing air outlet. The washing machine wire mesh demister is arranged at the washing air outlet, and the washing air outlet is connected to the gas condensation structure.

2. The integrated alkaline water electrolysis hydrogen production gas-liquid separation device according to claim 1 is characterized by: The gas-liquid separation structure comprises a gas-liquid separator and a fixed saddle, wherein the gas-liquid separator is fixed on the fixed saddle; the gas-liquid separator is provided with a gas-liquid mixture inlet, an alkali liquid circulation inlet and an alkali liquid circulation outlet.

3. The integrated alkaline water electrolysis hydrogen production gas-liquid separation device according to claim 2 is characterized in that: The alkali solution circulation inlet is provided with an anti-impact baffle.

4. The integrated alkaline water electrolysis hydrogen production gas-liquid separation device according to claim 2, characterized in that: The alkali solution circulation outlet is provided with an anti-vortex plate.

5. The integrated alkaline water electrolysis hydrogen production gas-liquid separation device according to claim 2, characterized in that: The gas-liquid separator is also provided with a liquid level meter.

6. The integrated alkaline water electrolysis hydrogen production gas-liquid separation device according to claim 2, characterized in that: The gas-liquid separator is also provided with a pressure difference sensor.

7. The integrated alkaline water electrolysis hydrogen production gas-liquid separation device according to claim 1, characterized in that: The gas condensation structure includes a gas condenser and a connecting saddle. The gas condenser is fixed to the gas-liquid separation structure through the connecting saddle. The gas condenser is provided with a cold medium inlet, a cold medium outlet, a condensed gas inlet, and a condensed gas outlet. The condensed gas inlet is connected to the washing outlet.

8. The integrated alkaline water electrolysis hydrogen production gas-liquid separation device according to claim 7, characterized in that: A condenser wire mesh demister is also provided at the condensed gas outlet.

9. The integrated alkaline water electrolysis hydrogen production gas-liquid separation device according to claim 7, characterized in that: The gas condenser is also provided with a condensation reflux port, and the condensation reflux port is communicated with the inner cavity of the gas-liquid separation structure through a reflux pipe.

10. The integrated alkaline water electrolysis hydrogen production gas-liquid separation device according to claim 1, characterized in that: The gas washing structure also includes an overflow pipe, one end of which is arranged inside the gas scrubber, and the other end of which passes through the gas scrubber and the gas-liquid separation structure in sequence and extends into the inner cavity of the gas-liquid separation structure.

Images