Differential pressure liquid level meter system and alkaline water electrolysis hydrogen production system

Abstract

The utility model relates to the field of separators, and discloses a pressure difference liquid level meter system and an alkaline electrolysis water hydrogen production system, which comprise a gas-alkali separator, a gas phase pressure tapping pipe, a liquid phase pressure tapping pipe and a pressure difference transmitter, the two ends of the gas phase pressure tapping pipe are respectively connected with the upper part of the gas-alkali separator and the pressure difference transmitter; the two ends of the liquid phase pressure tapping pipe are connected with the lower portion of the gas-alkali separator and the pressure difference transmitter respectively, the gas phase pressure tapping pipe is connected to the side face of the gas-alkali separator and avoids the highest point of the gas-alkali separator, and the liquid phase pressure tapping pipe is connected to the side face of the gas-alkali separator and avoids the lowest point of the gas-alkali separator. The gas-alkali separator has the beneficial effects that the gas-phase pressure tapping pipe and the liquid-phase pressure tapping pipe are arranged to avoid the highest point and the lowest point of the gas-alkali separator, so that the liquid level height can be directly obtained without conversion, a liquid discharge pipe and an exhaust pipe do not need to be additionally arranged under the long-term working condition, the operation is simple, meanwhile, liquid can be prevented from entering a pressure tapping port at the bottom of the differential pressure liquid level meter, and the cost is reduced. And the risk of corrosion leakage is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of separators, in particular to a differential pressure liquid level gauge system and an alkaline electrolyzed water hydrogen production system. Background Art

[0002] As Figure 1 shown, the pressure tapping ports of the differential pressure liquid level gauge of the existing horizontal gas-alkali separator usually take pressure from the top and the bottom. The gas pressure is taken from the top, and the liquid pressure is taken from the bottom. After the program conversion inside the differential pressure liquid level gauge, the liquid level height of the gas-alkali separator is reflected. However, in the prior art, the pressure taken at the bottom is the pressure at the lowest point of the bottom pressure tapping pipe, and the lowest point is not the lowest point of the cylinder body, and conversion is still required; and under long-term working conditions, a drain pipe needs to be added for gas phase pressure tapping, and an exhaust pipe needs to be added for liquid phase pressure tapping, and the operation is cumbersome; at the same time, the caustic liquid directly enters the bottom pressure tapping port of the differential pressure liquid level gauge, and there is a risk of corrosion and leakage under long-term working conditions. Therefore, there is an urgent need for a new differential pressure liquid level gauge system and an alkaline electrolyzed water hydrogen production system to solve the above problems. Summary of the Utility Model

[0003] The purpose of this application is to provide a differential pressure liquid level gauge system and an alkaline electrolyzed water hydrogen production system to quickly and conveniently measure the liquid level height.

[0004] The purpose of this application is achieved through the following technical solutions:

[0005] A differential pressure liquid level gauge system includes: a gas-alkali separator, a gas phase pressure tapping pipe, a liquid phase pressure tapping pipe, and a differential pressure transmitter. One end of the gas phase pressure tapping pipe is connected to the upper part of the gas-alkali separator, and the other end of the gas phase pressure tapping pipe is connected to the differential pressure transmitter. One end of the liquid phase pressure tapping pipe is connected to the lower part of the gas-alkali separator, and the other end of the liquid phase pressure tapping pipe is connected to the differential pressure transmitter. Among them, the gas phase pressure tapping pipe is connected to the side of the gas-alkali separator and is arranged to avoid the highest point of the gas-alkali separator, and the liquid phase pressure tapping pipe is connected to the side of the gas-alkali separator and is arranged to avoid the lowest point of the gas-alkali separator.

[0006] In some embodiments of this application, it further includes a diaphragm flange, and the diaphragm flange is arranged between the gas-alkali separator and the gas phase pressure tapping pipe, and the diaphragm flange is also arranged between the gas-alkali separator and the liquid phase pressure tapping pipe.

[0007] In some embodiments of this application, it further includes a wafer ball valve, and the wafer ball valve is arranged between the gas-alkali separator and the gas phase pressure tapping pipe, and the wafer ball valve is also arranged between the gas-alkali separator and the liquid phase pressure tapping pipe, and the diaphragm flange is installed on both sides of the wafer ball valve.

[0008] In some embodiments of the present application, a connecting pipe is further included. The connecting pipe is arranged between the gas-alkali separator and the gas-phase pressure tapping pipe, and the connecting pipe is also arranged between the gas-alkali separator and the liquid-phase pressure tapping pipe. And the connecting pipe is connected between the gas-alkali separator and the diaphragm flange on the side close to the gas-alkali separator.

[0009] In some embodiments of the present application, the connecting pipe is a stainless steel pipe.

[0010] In some embodiments of the present application, both the gas-phase pressure tapping pipe and the liquid-phase pressure tapping pipe are capillary tubes.

[0011] In some embodiments of the present application, pressure guiding oil is provided in both the gas-phase pressure tapping pipe and the liquid-phase pressure tapping pipe.

[0012] An alkaline electrolytic water hydrogen production system includes the differential pressure liquid level gauge system as described above.

[0013] In the differential pressure liquid level gauge system and the alkaline electrolytic water hydrogen production system of the present application, the gas-phase pressure and the liquid-phase pressure in the gas-alkali separator are transmitted to the differential pressure transmitter through the gas-phase pressure tapping pipe and the liquid-phase pressure tapping pipe. The differential pressure transmitter measures the pressure difference between the two ends. Since the gas-phase pressure tapping pipe and the liquid-phase pressure tapping pipe are arranged to avoid the highest point and the lowest point of the gas-alkali separator, the liquid level height can be directly obtained without conversion, and there is no need to add a drain pipe and an exhaust pipe under long-term working conditions. The operation is simple, and at the same time, liquid can be prevented from entering the bottom pressure tapping port of the differential pressure liquid level gauge, effectively reducing the risk of corrosion and leakage. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of a differential pressure liquid level gauge system in the prior art;

[0015] Figure 2 is a schematic structural diagram of the differential pressure liquid level gauge system of the present application.

[0016] In the figure, 1. Gas-alkali separator; 2. Gas-phase pressure tapping pipe; 3. Liquid-phase pressure tapping pipe; 4. Differential pressure transmitter; 5. Diaphragm flange; 6. Wafer check valve; 7. Connecting pipe. Detailed Embodiments

[0017] The following will further describe in detail the specific embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0018] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. used in the present application to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0019] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the connection inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0020] As Figure 2 shown, a differential pressure liquid level gauge system according to the first aspect of the embodiments of the present application includes: a gas-alkali separator 1, a gas-phase pressure tapping pipe 2, a liquid-phase pressure tapping pipe 3, and a differential pressure transmitter 4. One end of the gas-phase pressure tapping pipe 2 is connected to the upper part of the gas-alkali separator 1, the other end of the gas-phase pressure tapping pipe 2 is connected to the differential pressure transmitter 4, one end of the liquid-phase pressure tapping pipe 3 is connected to the lower part of the gas-alkali separator 1, and the other end of the liquid-phase pressure tapping pipe 3 is connected to the differential pressure transmitter 4. Among them, the gas-phase pressure tapping pipe 2 is connected to the side of the gas-alkali separator 1 and is arranged to avoid the highest point of the gas-alkali separator 1, and the liquid-phase pressure tapping pipe 3 is connected to the side of the gas-alkali separator 1 and is arranged to avoid the lowest point of the gas-alkali separator 1.

[0021] Based on the above technical solution, the differential pressure liquid level gauge system and the alkaline electrolytic water hydrogen production system of the present application convey the gas-phase pressure and liquid-phase pressure in the gas-alkali separator 1 to the differential pressure transmitter 4 through the gas-phase pressure tapping pipe 2 and the liquid-phase pressure tapping pipe 3. The differential pressure transmitter 4 measures the pressure difference between the two ends. Since the gas-phase pressure tapping pipe 2 and the liquid-phase pressure tapping pipe 3 avoid the highest point and the lowest point of the gas-alkali separator 1, the liquid level height can be directly obtained without conversion, and there is no need to add a drain pipe and an exhaust pipe under long-term working conditions. The operation is simple, and at the same time, liquid can be prevented from entering the bottom pressure tapping port of the differential pressure liquid level gauge, effectively reducing the risk of corrosion and leakage.

[0022] In some embodiments of the present application, as Figure 2As shown, it further includes a diaphragm flange 5, which is arranged between the gas-alkali separator 1 and the gas-phase pressure tapping pipe 2, and the diaphragm flange 5 is also arranged between the gas-alkali separator 1 and the liquid-phase pressure tapping pipe 3. The diaphragm flange 5 can isolate the media in each container, prevent the liquid in the pipeline and the separator from being confused, and the diaphragm flange 5 has high sensitivity, stable pressure transmission, long service life, and due to high pressure tapping accuracy, the response is faster after the liquid level in the container shakes, and the liquid level accuracy is higher.

[0023] Specifically, as Figure 2 shown, it further includes a wafer-type ball valve 6, which is arranged between the gas-alkali separator 1 and the gas-phase pressure tapping pipe 2, the wafer-type ball valve 6 is also arranged between the gas-alkali separator 1 and the liquid-phase pressure tapping pipe 3, and the diaphragm flange 5 is installed on both sides of the wafer-type ball valve 6. The wafer-type ball valve 6 has a simple structure, small volume, light weight, and is composed of only a few parts. Moreover, it can be quickly opened and closed by rotating only 90°, with simple operation. At the same time, the valve has good fluid control characteristics. When installing, only the two sides need to be attached to the diaphragm flange 5 for fixed installation, which is convenient for installation. And when maintaining and replacing, the wafer-type ball valve 6 can be closed, making the maintenance and replacement of the differential pressure liquid level gauge more convenient.

[0024] More specifically, as Figure 2 shown, it further includes a connecting pipe 7, which is arranged between the gas-alkali separator 1 and the gas-phase pressure tapping pipe 2, the connecting pipe 7 is also arranged between the gas-alkali separator 1 and the liquid-phase pressure tapping pipe 3, and the connecting pipe 7 is connected between the gas-alkali separator 1 and the diaphragm flange 5 on the side close to the gas-alkali separator 1. In order to install the diaphragm flange 5 and the wafer-type ball valve 6 more stably and reliably, it is necessary to connect the diaphragm flange 5 and the gas-alkali separator 1 through the connecting pipe 7.

[0025] More specifically, as Figure 2 shown, the connecting pipe 7 is a stainless steel pipe. The stainless steel pipe has high strength and has the characteristic of anti-corrosion, and it is very suitable as the material of the connecting pipe 7.

[0026] In some embodiments of the present application, as Figure 2 shown, both the gas-phase pressure tapping pipe 2 and the liquid-phase pressure tapping pipe 3 are capillary tubes. The capillary tubes have a small inner diameter and low cost, and at the same time do not affect the gas-phase pressure tapping and liquid-phase pressure tapping work.

[0027] In some embodiments of the present application, as Figure 2 shown, there is pressure guiding oil in both the gas-phase pressure tapping pipe 2 and the liquid-phase pressure tapping pipe 3. The pressure guiding oil can transmit the pressure in the pressure tapping pipe to the differential pressure transmitter 4, and simply and conveniently realize the measurement of the differential pressure.

[0028] In the second aspect of the embodiments of the present application, an alkaline electrolyzed water hydrogen production system is proposed, which includes the differential pressure liquid level gauge system as described above. Since the alkaline electrolyzed water hydrogen production system includes the above-mentioned differential pressure liquid level gauge system, it has the beneficial effects of the above differential pressure liquid level gauge system, which will not be elaborated here.

[0029] In summary, for the differential pressure liquid level gauge system and the alkaline electrolyzed water hydrogen production system of the present application, the gas phase pressure and the liquid phase pressure in the gas-alkali separator 1 are transmitted to the differential pressure transmitter 4 through the gas phase pressure taking pipe 2 and the liquid phase pressure taking pipe 3. The differential pressure transmitter 4 measures the pressure difference between the two ends. Since the gas phase pressure taking pipe 2 and the liquid phase pressure taking pipe 3 are arranged to avoid the highest point and the lowest point of the gas-alkali separator 1, the liquid level height can be directly obtained without conversion, and there is no need to add a liquid discharge pipe and an exhaust pipe under long-term working conditions. The operation is simple, and at the same time, the liquid can be prevented from entering the bottom pressure taking port of the differential pressure liquid level gauge, effectively reducing the risk of corrosion and leakage.

[0030] The above is only the preferred embodiment of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present application, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present application.

Claims

1. A differential pressure level gauge system, characterized in that: include: A gas-alkali separator, a gas-phase pressure-taking tube, a liquid-phase pressure-taking tube and a differential pressure transmitter, wherein one end of the gas-phase pressure-taking tube is connected to the upper part of the gas-alkali separator, the other end of the gas-phase pressure-taking tube is connected to the differential pressure transmitter, one end of the liquid-phase pressure-taking tube is connected to the lower part of the gas-alkali separator, and the other end of the liquid-phase pressure-taking tube is connected to the differential pressure transmitter, wherein the gas-phase pressure-taking tube is connected to the side of the gas-alkali separator and is arranged to avoid the highest point of the gas-alkali separator, and the liquid-phase pressure-taking tube is connected to the side of the gas-alkali separator and is arranged to avoid the lowest point of the gas-alkali separator.

2. The differential pressure level gauge system according to claim 1, characterized in that: It also includes a diaphragm flange, which is arranged between the gas-alkali separator and the gas phase pressure taking pipe, and the diaphragm flange is also arranged between the gas-alkali separator and the liquid phase pressure taking pipe.

3. The differential pressure level gauge system according to claim 2, characterized in that: It also includes a wafer-type ball valve, which is arranged between the gas-alkali separator and the gas phase pressure taking pipe. The wafer-type ball valve is also arranged between the gas-alkali separator and the liquid phase pressure taking pipe, and the diaphragm flange is installed on both sides of the wafer-type ball valve.

4. The differential pressure level gauge system according to claim 3, characterized in that: It also includes a connecting pipe, which is arranged between the gas-alkali separator and the gas phase pressure taking pipe, and the connecting pipe is also arranged between the gas-alkali separator and the liquid phase pressure taking pipe, and the connecting pipe is connected between the gas-alkali separator and a diaphragm flange close to one side of the gas-alkali separator.

5. The differential pressure level gauge system according to claim 4, characterized in that: The connecting pipe is a stainless steel pipe.

6. The differential pressure level gauge system according to any one of claims 1 to 5, characterized in that: The gas phase pressure taking tube and the liquid phase pressure taking tube are both capillaries.

7. The differential pressure level gauge system according to any one of claims 1 to 5, characterized in that: The gas phase pressure taking pipe and the liquid phase pressure taking pipe are both provided with pressure guiding oil.

8. An alkaline water electrolysis hydrogen production system, characterized in that: The invention comprises a differential pressure level gauge system as described in any one of claims 1 to 7.

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