A horizontal gas-liquid two-phase separator for producing hydrogen by electrolysis of water

Abstract

The utility model relates to the field of new energy technology, and specifically to a horizontal gas-liquid two-phase separator for electrolyzing water to produce hydrogen, including an air inlet pipe, a cylinder assembly, a baffle, a blade separator assembly, a partition, a filter element bottom plate assembly, a gas-liquid separation filter element, an air outlet pipe, a liquid discharge pipe and a sight glass. The separator adopts the principles of gravity sedimentation, inertial separation, collision interception and condensation separation to perform three-stage step-by-step separation on the gas-liquid mixture produced by the electrolytic hydrogen production system. The gravity sedimentation section separates droplets larger than 100um, the blade separator separates droplets larger than 10um, and the gas-liquid separation filter element separates droplets smaller than 10um, and finally reaches an outlet gas liquid content of less than 5mg / Nm 3 The separated liquid is transported back to the electrolytic hydrogen production system through the drain pipe for recycling. The separator has the advantages of compact structure, high separation efficiency, and economic efficiency, which can effectively improve the economy and reliability of the water electrolysis hydrogen production system.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, in particular to a horizontal gas-liquid two-phase separator for producing hydrogen by electrolyzing water. Background Art

[0002] The hydrogen production system by electrolysis of water 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 separators of the separation system through pipelines to separate the gas and the electrolyte. 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 electrolyte.

[0003] In order to solve the problem of low separation efficiency of gas-liquid separator, a horizontal gas-liquid two-phase separator for hydrogen production by water electrolysis is proposed. The gas-liquid mixture produced by the hydrogen production system is separated step by step in three stages by using the principles of gravity sedimentation, inertial separation, collision interception and condensation separation, and finally the outlet gas liquid content is less than 5mg / Nm 3 The separator has the advantages of compact structure, high separation efficiency, and economical and high efficiency, and can effectively improve 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 horizontal gas-liquid two-phase separator for hydrogen production by electrolysis of water. The utility model adopts the principles of gravity sedimentation, inertial separation, collision interception and condensation separation to separate the gas-liquid mixture produced by the electrolysis hydrogen production system in three stages. The gravity sedimentation stage separates water droplets larger than 100um, the blade separator separates water droplets larger than 10um, and the gas-liquid separation filter element separates water droplets smaller than 10um, so as to finally achieve an outlet gas liquid content of less than 5mg / Nm 3 The separator has the advantages of compact structure, high separation efficiency, and economical and high efficiency, and can effectively improve the economy and reliability of the water electrolysis hydrogen production system.

[0005] A horizontal gas-liquid two-phase separator for producing hydrogen by electrolyzing water comprises an air inlet pipe, a cylinder assembly, a baffle, a blade separator assembly, a partition, a filter element bottom plate assembly, a gas-liquid separation filter element, an air outlet pipe, a liquid discharge pipe and a liquid sight glass.

[0006] Furthermore, the cylinder assembly is composed of a left head, a cylinder, a flange, a flange cover and a base.

[0007] Furthermore, the left side head, baffle plate and cylinder body form a primary gravity sedimentation separation section, which utilizes the gravity sedimentation principle to separate large droplets larger than 100 um in the airflow.

[0008] Furthermore, the blade separator assembly adopts a W-shaped baffle to form a secondary blade separation section, and uses the inertial collision principle to intercept small and medium-sized droplets larger than 10 um in the airflow.

[0009] Furthermore, the filter element bottom plate assembly is welded to the inner wall of the cylinder body to fix the gas-liquid separation filter element.

[0010] Furthermore, the gas-liquid separation filter element adopts a hydrophobic ultra-fine glass fiber filter layer to form a three-stage gas-liquid separation section, and uses the condensation separation principle to intercept tiny droplets below 10 um in the airflow.

[0011] Furthermore, in a possible implementation mode of the utility model, the gas-liquid two-phase mixture discharged from the electrolytic cell enters the interior of the barrel assembly through the air inlet pipe, and the gas-liquid mixture is sprayed axially toward the left end cap of the barrel assembly.

[0012] Large liquid droplets larger than 1 mm in the gas-liquid mixture are intercepted by the head and flow in the opposite direction along the axial direction to the gravity sedimentation separation section on the right. Large liquid droplets larger than 100 um in the gas-liquid mixture settle on the baffle plate under the action of gravity, flow to the right along the direction of the baffle plate, and gather at the bottom of the cylinder of the cylinder assembly.

[0013] The gas-liquid mixture after the primary separation enters the separation channel of the blade separator assembly. The small and medium-sized droplets larger than 10 um in the gas-liquid mixture settle to the bottom plate of the blade separator assembly under the action of inertial collision and gravity, flow out along the airflow direction, and gather at the bottom of the cylinder of the cylinder assembly.

[0014] After the secondary separation, the gas-liquid mixture enters the gas-liquid separation filter element, passes through the hydrophobic ultra-fine glass fiber filter layer, and the tiny droplets below 10um in the gas-liquid mixture settle to the lower part along the outer side of the gas-liquid separation filter element under the action of condensation separation, and gather at the bottom of the cylinder assembly, finally reaching the outlet gas liquid content less than 5mg / Nm 3 The pure gas is discharged through the outlet pipe.

[0015] The liquid collected at the bottom of the cylinder is transported back to the electrolytic hydrogen production system through a drain pipe for recycling.

[0016] Beneficial effects of the utility model:

[0017] Compared with the traditional gravity sedimentation separator, this utility model adopts the principles of gravity sedimentation, inertial separation, collision interception and condensation separation to separate the hydrogen liquid mixture and oxygen liquid mixture produced by the electrolytic hydrogen production system in three stages, and finally achieves an outlet gas liquid content of less than 5mg / Nm 3 .

[0018] The separator has the advantages of compact structure, high separation efficiency, and economical and high efficiency, and can effectively improve the economy and reliability of the water electrolysis hydrogen production system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 The figure is a schematic diagram of the structure of a horizontal gas-liquid two-phase separator for producing hydrogen by electrolysis of water.

[0021] In the figure:

[0022] 01. Intake pipe;

[0023] 02, cylinder assembly; 0201, left end cap; 0202, cylinder; 0203, flange; 0204, flange cover; 0205, base;

[0024] 03. Baffle; 04. Blade separator assembly; 05. Partition; 06. Filter element bottom plate assembly; 07. Hydrogen separation filter element; 08. Air outlet pipe; 09. Drain pipe; 10. Sight glass. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] like Figure 1 As shown, a horizontal gas-liquid two-phase separator for producing hydrogen by electrolyzing water includes an air inlet pipe 01, a cylinder assembly 02, a baffle plate 03, a blade separator assembly 04, a partition 05, a filter element bottom plate assembly 06, a hydrogen separation filter element 07, an air outlet pipe 08, a drain pipe 09 and a sight glass 10.

[0028] The cylinder assembly 02 consists of a left head 0201, a cylinder 0202, a flange 0203, a flange cover 0204 and a base 0205.

[0029] The left side head 0201, baffle 03 and cylinder 0202 form a primary gravity sedimentation separation section, which uses the principle of gravity sedimentation to separate large droplets larger than 100 um in the air flow.

[0030] The blade separator assembly 04 uses a W-shaped baffle to form a secondary blade separation section, and uses the inertial collision principle to intercept small and medium droplets larger than 10um in the airflow.

[0031] The filter element bottom plate assembly 06 is welded to the inner wall of the cylinder 0202 and is used to fix the hydrogen separation filter element 07.

[0032] The hydrogen separation filter element 07 uses a hydrophobic ultra-fine glass fiber filter layer to form a three-stage gas-liquid separation section, and uses the condensation separation principle to intercept tiny droplets below 10um in the airflow.

[0033] The sight glass 10 is used to observe the liquid level at the bottom of the cylinder assembly 02.

[0034] In a possible implementation mode of the utility model, the hydrogen-alkaline water mixture discharged from the electrolyzer enters into the interior of the cylinder assembly 02 through the air inlet pipe 01, and the hydrogen-alkaline water mixture is sprayed axially toward the left side head 0201 of the cylinder assembly 02.

[0035] Large droplets larger than 1 mm in the hydrogen-alkaline water mixture are intercepted by the left head 0201 and flow axially in the opposite direction to the gravity sedimentation separation section on the right. Large droplets larger than 100 um in the hydrogen-alkaline water mixture settle on the baffle 03 under the action of gravity, flow to the right along the direction of the baffle 03, and gather at the bottom of the cylinder 0202 of the cylinder assembly 02.

[0036] The hydrogen-alkaline water mixture after the primary separation enters the separation channel of the blade separator assembly 04. The small and medium-sized droplets larger than 10 um in the hydrogen-alkaline water mixture settle to the bottom plate of the blade separator assembly 04 under the action of inertial collision and gravity, flow out along the air flow direction, and gather at the bottom of the cylinder 0202 of the cylinder assembly 02.

[0037] After the secondary separation, the hydrogen-alkali water mixture passes through the partition 05 and the filter element bottom plate assembly 06 and enters the hydrogen separation filter element 07. After passing through the hydrophobic ultra-fine glass fiber filter layer, the tiny droplets below 10um in the hydrogen-alkali water mixture settle along the outer side of the hydrogen separation filter element 07 to the lower part under the action of condensation separation, and gather at the bottom of the cylinder 0202 of the cylinder assembly 02, and finally reach the outlet gas liquid content less than 5mg / Nm 3 The pure hydrogen is discharged through the outlet pipe 08.

[0038] The alkali solution collected at the bottom of the cylinder is transported back to the electrolytic hydrogen production system through the drain pipe 09 for recycling.

[0039] The utility model 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 utility model should be included in the scope of protection of the utility model.

Claims

1. A horizontal gas-liquid two-phase separator for producing hydrogen by electrolysis of water, characterized in that: It comprises an air inlet pipe (01), a cylinder assembly (02), a baffle (03), a blade separator assembly (04), a partition (05), a filter element bottom plate assembly (06), a hydrogen separation filter element (07), an air outlet pipe (08), a liquid discharge pipe (09) and a sight glass (10); the cylinder assembly (02) is composed of a left end cap (0201), a cylinder (0202), a flange (0203), a flange cover (0204) and a base (0205); The left end cap (0201), baffle plate (03) and cylinder (0202) form a first-stage gravity sedimentation separation section, which utilizes the gravity sedimentation principle to separate large droplets larger than 100 um in the airflow; The blade separator assembly (04) uses a W-shaped baffle to form a secondary blade separation section, and uses the inertial collision principle to intercept small and medium-sized droplets larger than 10 um in the airflow; The filter element bottom plate assembly (06) is welded to the inner wall of the cylinder (0202) and is used to fix the hydrogen separation filter element (07); the hydrogen separation filter element (07) uses a hydrophobic ultra-fine glass fiber filter layer to form a three-stage gas-liquid separation section, and uses the condensation separation principle to intercept tiny droplets below 10 um in the airflow.

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