Gas-liquid separation frame system with self-cleaning function

Abstract

The invention relates to the technical field of hydrogen production equipment, in particular to a gas-liquid separation frame system with a self-cleaning function, which comprises a gas-liquid separator, a circulating pipeline, a circulating pump, a filter and at least five self-control valves (V1, V2, V3, V4 and V5), the self-control valves V1, V2 and V4 are closed in the self-cleaning stage, and the self-control valves V3 and V5 are opened to inject cleaning fluid and start the circulating pump; the filter is arranged on the circulating pipeline and is used for intercepting impurities and realizing precipitation separation; the system is provided with a liquid level sensor, and when the liquid level reaches the set height, the automatic control valve V5 is automatically closed. The pre-cleaning process is integrated to the system starting stage, residual impurities are thoroughly removed through multiple times of circulation, the impurity removal rate is effectively increased, actual operation data show that the replacement period of the diaphragm is prolonged to 18 months from 6 months, the breakage rate is reduced by 80%, and the service life of the diaphragm is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production equipment, and in particular to a gas-liquid separation framework system with a self-cleaning function. Background Art

[0002] Traditional alkaline water electrolysis (ALK) hydrogen production technology has long been widely used in industrial hydrogen production due to its high maturity and low cost. However, significant technical deficiencies remain during system operation and maintenance, particularly in the coordinated control of the gas-liquid separation framework and the electrolyzer. Traditional systems rely on the electrolyzer to maintain a connected circuit for pure water cleaning or the addition of alkali solution. Impurities such as rust, welding slag, and particulate matter left in the gas-liquid separation container, piping, and valves can enter the electrolyzer with the liquid, leading to the following problems: 1. Diaphragm contamination and damage: Impurities accumulate within the electrolyzer, clogging the diaphragm's pores and reducing ion conduction efficiency. Sharp particles (such as metal debris) can even scratch the diaphragm, causing gas cross-permeation and seriously threatening system safety. 2. Decreased electrolysis efficiency: A contaminated diaphragm's internal resistance increases, requiring a 10%-20% increase in electrolysis voltage and significantly increasing energy consumption. 3. Surge in maintenance costs: The frequency of diaphragm replacement increases, and downtime for cleaning increases, directly impacting production continuity.

[0003] To address the above issues, the industry has tried a variety of optimization solutions, but all have shortcomings: for example, the technical solution disclosed in patent CN 119281030A reduces the gas content of the lye through a double gas-liquid separation structure, but does not involve a pre-cleaning mechanism before startup, and cannot solve the problem of initial impurity residues. Summary of the Invention

[0004] The purpose of the present invention is to solve the above-mentioned shortcomings in the prior art and to propose a gas-liquid separation frame system with a self-cleaning function.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] Design a gas-liquid separation framework system with self-cleaning function,

[0007] The system includes a gas-liquid separator, a circulation pipeline, a circulation pump, a filter and at least five automatic control valves (V1, V2, V3, V4, V5);

[0008] The automatic control valves V1, V2, and V4 are closed during the self-cleaning phase, and the automatic control valves V3 and V5 are opened to inject cleaning fluid and start the circulation pump;

[0009] The filter is arranged on the circulation pipeline to intercept impurities and realize precipitation separation;

[0010] The system is equipped with a liquid level sensor, which automatically closes the automatic control valve V5 when the liquid level reaches the set height;

[0011] Through multiple cycles of cleaning process, including repeated operations of "adding liquid-cleaning-draining liquid", until the internal cleanliness of the gas-liquid separation frame meets the standard, it is connected to the electrolytic cell for operation.

[0012] Furthermore, in the multiple cycle cleaning process, the single cleaning time is set to 5-30 minutes;

[0013] The cleaning cycle is 3-5 times, and the system automatically detects the concentration of residual impurities after each drainage. If it does not meet the standard, a new round of cleaning will be triggered.

[0014] Furthermore, a sediment collection bin is provided at the bottom of the filter for periodically discharging sediment.

[0015] Furthermore, the liquid level sensor is linked with the central controller to adjust the opening and closing state of the automatic control valve V5 in real time.

[0016] Furthermore, the automatic control valves V1, V2, V3, V4, and V5 are solenoid valves or pneumatic valves, and their opening and closing logic is controlled by a preset program; in the discharge stage, the opening angle of the automatic control valve V1 is linearly related to the discharge flow rate to avoid sudden changes in pipeline pressure.

[0017] Furthermore, the cleaning liquid is pure water or a solution containing alkaline electrolyte, with a pH value ranging from 8 to 12; the temperature of the cleaning liquid is maintained at 40 to 60° C. by a heater to accelerate the dissolution of impurities and separation efficiency.

[0018] Furthermore, the system integrates a pressure sensor, which automatically shuts down the circulation pump and sounds an alarm when the circulation line pressure exceeds a threshold value; after the alarm signal is triggered, the automatic control valve V1 is forced to open for emergency fluid discharge and pressure relief.

[0019] Furthermore, when the electrolytic cell is connected and running, the automatic control valves V2 and V4 are opened in stages, with an initial opening of 20%-50%, and then gradually increased to a fully open state; after the electrolytic cell is started, the circulation pump is switched to a low power mode to maintain the dynamic balance of the electrolyte.

[0020] The present invention proposes a gas-liquid separation framework system with a self-cleaning function, which has the following beneficial effects:

[0021] The present invention integrates the pre-cleaning process into the system startup phase, thoroughly removing residual impurities through multiple cycles, effectively improving the impurity removal rate. Actual operating data shows that the diaphragm replacement cycle is extended from 6 months to 18 months, and the breakage rate is reduced by 80%, greatly extending the service life of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 is a three-dimensional diagram of the filter;

[0024] Figure 3 Schematic diagram of the internal structure of the filter;

[0025] Figure 4 is a schematic diagram of the filter assembly; DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] A gas-liquid separation framework system with self-cleaning function, such as Figure 1 As shown,

[0028] The automatic control valve V1 in this embodiment is connected to the filter 4 for draining the filter 4. The automatic control valve V2 is arranged on the pipeline connecting the electrolytic cell outlet 501 of the electrolytic cell 5 and the filter inlet 401 of the filter 4. The automatic control valve V3 is arranged on the pipeline connecting the separator outlet 101 of the gas-liquid separator 1 and the filter inlet 401 of the filter 4. The automatic control valve V4 is arranged on the pipeline connecting the separator outlet 2 102 of the gas-liquid separator 1 and the electrolytic cell inlet 502 of the electrolytic cell 5. The automatic control valve V5 is arranged on the filter 4 for injecting cleaning liquid into the filter 4. The filter outlet 402 of the filter 4 and the circulation pump inlet 301 of the circulation pump 3 are connected by a pipeline. The circulation pump outlet 302 of the circulation pump 3 and the separator inlet 103 of the gas-liquid separator 1 are connected by a pipeline.

[0029] In this embodiment, the automatic control valves V1, V2, and V4 are closed during the self-cleaning phase, and the automatic control valves V3 and V5 are opened to inject cleaning liquid and start the circulation pump 3. The liquid level is controlled by a laser ranging sensor installed on the top of the gas-liquid separator 1 and a PID controller linked to the circulation pump 3. When the liquid level reaches 90% of the design height, linear deceleration water injection is performed;

[0030] The filter 4 is provided on the circulation pipeline 2 to intercept impurities and achieve precipitation separation;

[0031] The system is equipped with a liquid level sensor, which automatically closes the automatic control valve V5 when the liquid level reaches the set height;

[0032] Through multiple cycles of cleaning process, including repeated operations of "adding liquid-cleaning-draining liquid", until the internal cleanliness of the gas-liquid separation frame meets the standard, the electrolytic cell 5 is connected for operation. Preferably, in this embodiment, the cycle cleaning protocol configured by the controller can be used to execute: close V1 / V2 / V4 and open V3 / V5 → add cleaning liquid to the set liquid level → start the circulation pump to flush the pipeline → filter capture impurities → open V1 to discharge waste liquid after the timing is completed, and repeat the iterative cleaning mechanism of the cycle cleaning protocol ≥3 times. The electrolytic cell is connected to the locking device, and V2 / V4 is allowed to be opened only when the cleaning is completed and the pollutant concentration sensor value is less than 5ppm.

[0033] In an optional embodiment of the present invention, in a multi-cycle cleaning process, the single cleaning time is set to 5-30 minutes; the number of cycle cleanings is 3-5 times, and after each drainage, the system automatically detects the residual impurity concentration, and triggers a new round of cleaning if it does not meet the standard;

[0034] In an optional embodiment of the present invention, in order to improve the filtering effect of sharp particles, the applicant also sets a filter 4, such as Figure 2-4 As shown, the filter 4 includes a shell 401, which is provided with a top inlet 402 and a bottom outlet 403. A sedimentation collection bin is provided at the bottom of the filter 4 and is connected to an automatic control valve for regularly discharging sediment. A central tube 404 communicating with the bottom outlet 403 is provided inside the shell 401. Both ends of the central tube 404 are sealed, and the bottom is connected to the inner wall of the shell 401 through a connecting column 405. A plurality of annular box bodies 406 are distributed at intervals on the outer wall of the central tube 404. The box bodies 406 and the central tube 404 are connected through a through hole 407. A filter assembly 409 is provided at the bottom of the box body 406, and a rotating vibration assembly 410 for impacting the filter assembly 409 to cause the filter assembly 409 to deform is provided below the filter assembly 409.

[0035] In an optional embodiment of the present invention, the filter assembly 409 includes a filter screen 4091 and a deformation band 4092 that are interconnected. The filter screen 4091 and the deformation band 4092 are both annular and are spaced apart from the outer edge of the box body 406 to the center tube 404. The filter screen 4091 extends in an arc shape toward the bottom of the shell 401, and the deformation band 4092 extends in an arc shape toward the top of the shell 401. A filter hole 4093 is provided on the filter screen 4091. The filter hole 4093 is conical, and its diameter decreases from the bottom to the top of the shell 401.

[0036] In an optional embodiment of the present invention, the rotational vibration component 410 includes two support rods 4101 symmetrically arranged on the deformation belt 4092, one end of the support rod 4101 is provided with a sphere 4102, a rotating sleeve 4103 is provided on the central tube 404, the rotating sleeve 4103 is supported by the limiting plates 4104 on both sides, the rotating sleeve 4103 is provided with a blade 4105, and the position of the blade 4105 corresponding to the sphere 4102 is provided with a support rod 4106, and the support rod 4106 is provided with a There is a second sphere 4107 for colliding with the first sphere 4102. When the blade 4105 rotates under the impact of the water flow, it drives the second sphere 4107 to continuously collide with the two first spheres 4102, causing the deformation belt 4092 to deform and squeeze the filter screen 4091. Since the filter hole 4093 is conical, after the filter hole 4093 is squeezed, the sharp particles in the filter hole 4093 are pushed out of the filter hole 4093, thereby preventing the filter hole 4093 from being blocked and improving the filtering effect of impurities.

[0037] In an optional embodiment of the present invention, the liquid level sensor is linked to the central controller to adjust the opening and closing state of the automatic control valve V5 in real time;

[0038] The system has a built-in flow meter to monitor the flow rate of the circulation pump 3 and dynamically adjust the pump power to match the cleaning demand.

[0039] In an optional embodiment of the present invention, the self-controlled valves V1, V2, V3, V4, and V5 are solenoid valves or pneumatic valves, and their opening and closing logic is controlled by a preset program;

[0040] During the discharge stage, the opening angle of the automatic control valve V1 is linearly related to the discharge flow rate to avoid sudden changes in pipeline pressure.

[0041] In an optional embodiment of the present invention, the cleaning liquid is pure water or a solution containing an alkaline electrolyte with a pH value ranging from 8 to 12; the temperature of the cleaning liquid is maintained at 40 to 60° C. by a heater to accelerate the dissolution of impurities and separation efficiency.

[0042] In an optional embodiment of the present invention, the system integrates a pressure sensor, which automatically shuts down the circulation pump and sounds an alarm when the circulation line pressure exceeds a threshold value; after the alarm signal is triggered, the automatic control valve V1 is forced to open for emergency liquid discharge and pressure relief.

[0043] In an optional embodiment of the present invention, when the electrolytic cell is connected and running, the automatic control valves V2 and V4 are opened in stages, with an initial opening of 20%-50%, and then gradually increased to a fully open state; after the electrolytic cell is started, the circulation pump 3 is switched to a low power mode to maintain the dynamic balance of the electrolyte.

[0044] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A gas-liquid separation framework system with self-cleaning function, characterized by: The system includes a gas-liquid separator, a circulation pipeline, a circulation pump, a filter and at least five automatic control valves (V1, V2, V3, V4, V5); The automatic control valves V1, V2, and V4 are closed during the self-cleaning phase, and the automatic control valves V3 and V5 are opened to inject cleaning fluid and start the circulation pump; The filter is arranged on the circulation pipeline to intercept impurities and realize precipitation separation; The system is equipped with a liquid level sensor, which automatically closes the automatic control valve V5 when the liquid level reaches the set height; Through multiple cycles of cleaning process, including repeated operations of "adding liquid-cleaning-draining", until the internal cleanliness of the gas-liquid separation frame meets the standard, it is connected to the electrolytic cell for operation.

2. The gas-liquid separation framework system according to claim 1, characterized in that: In the multi-cycle cleaning process, the single cleaning time is set to 5-30 minutes; the number of cycle cleanings is 3-5 times, and the system automatically detects the residual impurity concentration after each drainage. If it does not meet the standard, a new round of cleaning is triggered.

3. The gas-liquid separation framework system according to claim 1, characterized in that: A sediment collection bin is provided at the bottom of the filter for regularly discharging sediment.

4. The gas-liquid separation framework system according to claim 1, characterized in that: The liquid level sensor is linked to the central controller to adjust the opening and closing state of the automatic control valve V5 in real time.

5. The gas-liquid separation framework system according to claim 1, characterized in that: The automatic control valves V1, V2, V3, V4, and V5 are electromagnetic valves or pneumatic valves, and their opening and closing logic is controlled by a preset program. During the discharge stage, the opening angle of the automatic control valve V1 is linearly related to the discharge flow rate to avoid sudden changes in pipeline pressure.

6. The gas-liquid separation framework system according to claim 1, characterized in that: The cleaning liquid is pure water or a solution containing alkaline electrolyte, with a pH value ranging from 8 to 12; the temperature of the cleaning liquid is maintained at 40 to 60° C. by a heater to accelerate the dissolution of impurities and separation efficiency.

7. The gas-liquid separation framework system according to claim 1, characterized in that: The system integrates a pressure sensor. When the circulation pipeline pressure exceeds the threshold, the circulation pump is automatically shut down and an alarm is sounded. After the alarm signal is triggered, the automatic control valve V1 is forced to open for emergency liquid discharge and pressure relief.

8. The gas-liquid separation framework system according to claim 1, characterized in that: When the electrolytic cell is connected and running, the automatic control valves V2 and V4 are opened in stages, with an initial opening of 20%-50%, and then gradually increased to a fully open state; after the electrolytic cell is started, the circulation pump switches to low power mode to maintain the dynamic balance of the electrolyte.

Images