Gas-liquid separation filter element for producing hydrogen by electrolyzing water

Abstract

The utility model relates to the technical field of new energy, in particular to a gas-liquid separation filter element for producing hydrogen by electrolyzing water, which comprises a hoop A, a sealant, an inner barrel, a gas-liquid filter layer, a middle barrel, a liquid phase settling layer, an outer barrel, a hoop B and a sealing ring, the gas-liquid filtering layer is formed by folding a plurality of layers of polyester fiber cloth with nano hydrophobic coatings, and small liquid drops with the diameter smaller than 10 microns in a gas-liquid two-phase mixture are condensed into medium and large liquid drops with the diameter larger than 100 microns by adopting the principles of collision, interception, electrostatic adsorption and Brownian motion; the liquid-phase settling layer is formed by winding a porous polyester fiber cotton felt with a nano hydrophobic coating, medium and large liquid drops with the size being 100 microns or above are separated out by adopting the principles of interception filtration, pressure desorption and gravity settling, and finally the liquid content of outlet gas is smaller than 5 mg / Nm < 3 >; and the separated liquid is conveyed back to the electrolytic hydrogen production system through a liquid discharge pipe for cyclic utilization. The gas-liquid separation filter element has the advantages of being compact in structure, high in separation efficiency, small in pressure loss and the like, and the performance of a gas-liquid separator can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, and in particular to a gas-liquid separation filter element for producing hydrogen by electrolyzing water. Background Art

[0002] The potential of hydrogen as a clean energy is increasingly valued. The technology of hydrogen production by water electrolysis is widely used because of its maturity and stability. The system of hydrogen production by water electrolysis consists of an electrolyzer, a gas-liquid separation system, a purification system, a liquid distribution system, a control cabinet, a power supply system, an instrument device and a safety auxiliary system. The basic process flow is: the electrolyte is pressurized by a pump into the electrolyzer, and hydrogen and oxygen are produced under the electrolysis of direct current. The hydrogen-liquid mixture and the oxygen-liquid mixture enter the gas-liquid separator of the separation system through pipelines respectively, and the gas and the electrolyte are separated. The separated hydrogen enters the purification system for further dehydration and deoxygenation. The separated electrolyte is circulated back to the electrolyzer by a pump for continued use. At present, the structure of the gas-liquid separator is simple, and it mainly relies on gravity sedimentation and wire mesh interception for separation. Its separation efficiency is low, and the amount of liquid carried by the gas is large, which greatly increases the energy consumption of the purification system and the consumption of the electrolyte.

[0003] In order to solve the problem of low separation efficiency of gas-liquid separator, a gas-liquid separation filter element for water electrolysis hydrogen production is proposed, which is mainly used in the precision separation section of the gas-liquid separator. The principle of condensation separation and gravity sedimentation is adopted to precisely separate the tiny droplets below 10um in the gas-liquid two-phase mixture produced by the electrolytic hydrogen production system, and finally the liquid content of the outlet gas is less than 5mg / Nm 3 The gas-liquid separation filter element has the advantages of compact structure, high separation efficiency, and economical and high efficiency. It can effectively improve the performance of the gas-liquid separator and has a promoting significance for improving the economy and reliability of the water electrolysis hydrogen production system. Utility Model Content

[0004] Based on the above purpose, the utility model provides a gas-liquid separation filter element for hydrogen production by electrolysis of water, which adopts the principle of condensation separation and gravity sedimentation to precisely separate the tiny droplets below 10um in the gas-liquid two-phase mixture produced by the electrolysis hydrogen production system, and finally achieves the outlet gas liquid content less than 5mg / Nm 3 The gas-liquid separation filter element has the advantages of compact structure, high separation efficiency and small pressure loss, and can effectively improve the performance of the gas-liquid separator.

[0005] A gas-liquid separation filter element for producing hydrogen by electrolyzing water comprises a clamp A, a sealant, an inner cylinder, a gas-liquid filtering layer, a middle cylinder, a liquid phase sedimentation layer, an outer cylinder, a clamp B and a sealing ring.

[0006] Furthermore, the clamp A is a hollow structure and is made of 304 stainless steel.

[0007] Furthermore, the sealant is a polyurethane sealant, which is used to seal and bond the gas-liquid filtration layer and the liquid phase sedimentation layer.

[0008] Furthermore, the gas-liquid filtration layer is formed by folding a double layer of stainless steel wire mesh sandwiched by multiple layers of polyester fiber cloth with a nano-hydrophobic coating.

[0009] Furthermore, the liquid phase sedimentation layer is formed by winding a layer of porous polyester fiber felt with a nano-hydrophobic coating.

[0010] Furthermore, the clamp B is a hollow or closed structure, and is made of 304 stainless steel.

[0011] Furthermore, the sealing ring is made of silicone rubber or fluororubber, and the sealing structure is in the form of an O-ring or a flat gasket.

[0012] Further, in the implementation scheme of the utility model, the clamp A is filled with polyurethane sealant, and the inner cylinder, gas-liquid filtration layer, middle cylinder, liquid phase sedimentation layer and outer cylinder are inserted into the clamp A in sequence and left to stand for 10 minutes to form a whole, and then inverted and inserted into the clamp B filled with polyurethane sealant, and the height dimension, parallelism and verticality parameters are adjusted to the set values, and then left to stand for 1 hour to solidify. The sealing ring is bonded to the end faces of the clamp A and the clamp B by the polyurethane sealant.

[0013] After the gas-liquid separator is separated once, the gas-liquid mixture containing tiny droplets below 10um enters the interior of the gas-liquid separation filter element. The gas-liquid filtration layer uses the principles of collision, interception, electrostatic adsorption and Brownian motion to condense the tiny droplets below 10um in the gas-liquid two-phase mixture into medium and large droplets above 100um. The liquid phase sedimentation layer uses the principles of interception filtration, pressure desorption and gravity sedimentation to separate the medium and large droplets above 100um and gather them at the bottom of the outer cylinder for precipitation, and finally achieves an outlet gas liquid content of less than 5mg / Nm 3 .

[0014] Beneficial effects of the utility model:

[0015] Compared with the traditional separation filter element, the utility model adopts polyester fiber with nano-hydrophobic coating as the condensation filtration layer and liquid phase sedimentation layer, comprehensively utilizes the collision, interception, electrostatic adsorption and Brownian motion principles to condense tiny droplets into medium and large droplets, and then adopts interception filtration, pressure desorption and gravity sedimentation principles to separate the medium and large droplets, and finally achieves the outlet gas liquid content less than 5mg / Nm 3 The gas-liquid separation filter element has the advantages of compact structure, high separation efficiency and low pressure loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 The figure is an axial cross-sectional view of a gas-liquid separation filter element used for producing hydrogen by electrolysis of water.

[0018] Figure 2 It is a vertical partial cross-sectional view of a gas-liquid separation filter element used for producing hydrogen by electrolysis of water. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0020] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] like Figure 1 and Figure 2 As shown, a gas-liquid separation filter element for electrolyzing water to produce hydrogen includes a clamp A01, a sealant 02, an inner cylinder 03, a gas-liquid filter layer 04, a middle cylinder A05, a middle cylinder B06, a liquid phase sedimentation layer 07, an outer cylinder 08, a clamp B09 and an O-ring 10.

[0022] The clamp A01 is a U-shaped hollow structure and is made of 304 stainless steel.

[0023] Sealant 02 is a polyurethane sealant used for sealing and bonding the gas-liquid filtration layer and the liquid phase sedimentation layer.

[0024] The inner cylinder 03 is made of 304 stainless steel and is welded into a cylindrical structure by rolling perforated plates.

[0025] The gas-liquid filter layer 04 is formed by folding two layers of stainless steel wire mesh and three layers of polyester fiber cloth with a nano-hydrophobic coating.

[0026] The middle cylinder A05 and the middle cylinder B06 are made of 304 stainless steel and are rolled and welded into a cylindrical structure by perforated plates.

[0027] The liquid phase sedimentation layer 07 is formed by winding a layer of porous polyester fiber felt with a nano-hydrophobic coating.

[0028] The outer cylinder 08 is made of 304 stainless steel and is welded into a cylindrical structure by rolling a perforated plate.

[0029] The clamp B09 has a U-shaped hollow structure and is made of 304 stainless steel.

[0030] The material of the sealing ring 10 is fluororubber, and the sealing structure is an O-ring.

[0031] In the implementation scheme of the utility model, polyurethane sealant 02 is filled in 01, and the inner cylinder 03, gas-liquid filtration layer 04, middle cylinder A05, middle cylinder B06, liquid phase sedimentation layer 07 and outer cylinder 08 are first inserted into the clamp A01 in sequence and allowed to stand for 10 minutes to become one, and then inverted and inserted into the clamp B09 filled with polyurethane sealant 02, and the height dimension, parallelism and verticality parameters are adjusted to the set values, and then allowed to stand for 1 hour to solidify. The sealing ring 10 is bonded to the end faces of the clamp A01 and the clamp B09 by the polyurethane sealant 02.

[0032] After the gas-liquid separator is separated once, the gas-liquid mixture containing tiny droplets below 10um enters the interior of the gas-liquid separation filter element. The gas-liquid filtration layer uses the principles of collision, interception, electrostatic adsorption and Brownian motion to condense the tiny droplets below 10um in the gas-liquid two-phase mixture into medium and large droplets above 100um. The liquid phase sedimentation layer uses the principles of interception filtration, pressure desorption and gravity sedimentation to separate the medium and large droplets above 100um and gather them at the bottom of the outer cylinder for precipitation, and finally achieves an outlet gas liquid content of less than 5mg / Nm 3 The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A gas-liquid separation filter element for producing hydrogen by electrolysis of water, characterized in that: It comprises a clamp A (01), a sealant (02), an inner cylinder (03), a gas-liquid filtering layer (04), a middle cylinder A (05), a middle cylinder B (06), a liquid phase sedimentation layer (07), an outer cylinder (08), a clamp B (09) and a sealing ring (10).

2. A gas-liquid separation filter element for producing hydrogen by electrolysis of water according to claim 1, characterized in that: The sealant (02) is a polyurethane sealant, which is used to seal and bond the gas-liquid filtration layer and the liquid phase sedimentation layer.

3. A gas-liquid separation filter element for producing hydrogen by electrolysis of water according to claim 1, characterized in that: The gas-liquid filtering layer (04) is formed by folding two layers of stainless steel wire mesh sandwiching three layers of polyester fiber cloth with a nano-hydrophobic coating.

4. A gas-liquid separation filter element for producing hydrogen by electrolysis of water according to claim 1, characterized in that: The liquid phase sedimentation layer (07) is formed by winding a layer of porous polyester fiber felt with a nano hydrophobic coating.

5. A gas-liquid separation filter element for producing hydrogen by electrolysis of water according to claim 1, characterized in that: The sealing ring (10) is made of silicone rubber or fluororubber, and the sealing structure is in the form of an O-ring or a flat gasket.

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