Chemical storage bin shielding gas circulation pipeline

Abstract

The utility model discloses a protective gas circulation pipeline for a chemical storage bin, which belongs to the technical field of chemical production equipment and comprises a gas supply pipeline, one end of the gas supply pipeline is communicated with a gas storage tank, the other end of the gas supply pipeline is in flange connection with a gas guide pipe and is positioned between a filter cartridge and the gas storage tank, and the gas supply pipeline is provided with a plurality of connecting pipes. A chemical storage tank is connected to the end, away from the gas supply pipeline, of the connecting pipe, a protective gas circuit is connected between the chemical storage tank and the gas supply pipeline, a filter cartridge is inserted into the gas guide pipe, a gas return pipe is fixed to the upper end of the filter cartridge, and the end, away from the filter cartridge, of the gas return pipe is connected to the gas storage tank; the protective gas circulation pipeline can purify protective nitrogen, and the nitrogen protection effect can be improved in long-time nitrogen protection circulation.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical production equipment, and in particular relates to a protective gas circulation pipeline for a chemical storage warehouse. Background Art

[0002] The storage of chemicals has its special requirements: 1. It needs to be sealed; 2. Protective gas is often required to prevent the stored chemicals from reacting chemically with oxygen in the air.

[0003] At present, chemicals are generally stored in cans or barrels to achieve closed storage. When they are needed, the lid of the can or barrel is directly opened. Its safety is limited and has high requirements on operators and the environment.

[0004] In order to improve safety, people gradually use tanks containing nitrogen supply valves and use static protective gas to protect chemicals. The above-mentioned nitrogen supply valve can be, but is not limited to, a pressure regulating valve with a pilot, which uses the energy of the medium being regulated as a power source, introduces a pilot of the pressure valve to control the position of the pressure valve core, changes the flow of the medium flowing through the valve, and keeps the pressure at the rear end of the valve constant. For specific explanation, the pressure regulating valve with a pilot can be, but is not limited to, the pressure regulating valve with a pilot produced / sold by Hangzhou Quantong Instrument Valve Co., Ltd.

[0005] In actual use, the tank containing the nitrogen supply valve and its circulation pipeline generally do not have a structure that allows the nitrogen to be purified after passing through the chemical storage pipe. Therefore, during the long-term circulation process of the nitrogen, gaseous chemicals may remain in it. Utility Model Content

[0006] The utility model aims to provide a protective gas circulation pipeline for a chemical storage warehouse, which can purify protective nitrogen and improve the nitrogen protection effect in a long-term nitrogen protection cycle.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a protective gas circulation pipeline for a chemical storage warehouse, which includes an air supply pipeline, one end of the air supply pipeline is connected to an air storage tank, and the other end is flange-connected with an air guide pipe, which is located between a filter cartridge and the air storage tank. The air supply pipeline is provided with a plurality of connecting pipes, and the connecting pipe is connected to a chemical storage tank away from the end of the air supply pipeline, and a protective gas circuit is connected between the chemical storage tank and the air supply pipeline, the air guide pipe is plugged with a filter cartridge, a return air pipe is fixed to the upper end of the filter cartridge, and the return air pipe is connected to the air storage tank away from the end of the filter cartridge.

[0008] Furthermore, the protective gas circuit includes an air inlet pipe threadedly connected to the connecting pipe, the air inlet pipe is connected to the chemical storage tank away from the connecting pipe end, and also includes an air outlet pipe fixed on the chemical storage tank, the air outlet pipe is connected to the air supply pipeline away from the chemical storage tank end.

[0009] Furthermore, a solenoid valve is fixed outside the air intake pipe.

[0010] Furthermore, the filter cartridge is also fixed with a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe are respectively fixed at the upper and lower ends of the filter cartridge.

[0011] Furthermore, the air guide tube is provided with a through hole on the outside, and a plurality of through holes are provided along the axial direction of the air guide tube.

[0012] Furthermore, a fixing plate is provided on the outside of the return air duct, the fixing plate is semicircular, two fixing plates are provided, the two fixing plates are fixed by screws, and an electric heating plate is provided on the inner wall of each fixing plate.

[0013] The beneficial effects of the utility model are:

[0014] 1. Multiple connecting pipes are arranged in the pipeline, which can simultaneously protect multiple chemical storage tanks with nitrogen. At the same time, a solenoid valve is arranged at the outlet of each connecting pipe, which can independently control the air intake of each chemical storage tank, thereby reducing nitrogen waste and overall energy consumption.

[0015] 2. The filter cartridge and heating plate are set to purify the circulating nitrogen to avoid carrying gaseous chemicals into the circulation, ensure the purity of the nitrogen, and improve the protection effect of the nitrogen circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a protective gas circulation pipeline for a chemical storage warehouse provided by the utility model;

[0017] Figure 2 This is a schematic diagram of the filter cartridge structure of a protective gas circulation pipeline in a chemical storage warehouse provided by the utility model;

[0018] Figure 3 The utility model provides a chemical storage warehouse protective gas circulation pipeline Figure 2 Schematic side view of

[0019] Figure 4 The utility model provides a chemical storage warehouse protective gas circulation pipeline along the Figure 3 Schematic diagram of the AA line section.

[0020] In the figure: 1. Air supply pipeline; 2. Air guide pipe; 3. Connecting pipe; 4. Chemical storage tank; 5. Filter cartridge; 6. Return air pipe; 7. Air inlet pipe; 8. Air outlet pipe; 9. Solenoid valve; 10. Liquid inlet pipe; 11. Liquid outlet pipe; 12. Through hole; 13. Fixed plate; 14. Electric heating plate. DETAILED DESCRIPTION

[0021] In order to further understand the content, features and effects of the utility model, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0022] Please also refer to Figures 1 to 4 The protective gas circulation pipeline of the chemical storage warehouse of the utility model will be described in detail below with reference to the accompanying drawings.

[0023] like Figure 1 As shown, the protective gas circulation pipeline of the chemical storage warehouse includes an air supply pipe 1, one end of the air supply pipe 1 is connected to the gas storage tank, and the other end is flange-connected with an air guide pipe 2, which is located between the filter cartridge 5 and the gas storage tank. The air supply pipe 1 is provided with a plurality of connecting pipes 3, and the connecting pipes 3 are connected to a chemical storage tank 4 at the end away from the air supply pipe 1, and a protective gas circuit is connected between the chemical storage tank 4 and the air supply pipe 1, and the air guide pipe 2 is plugged with a filter cartridge 5, and a return air pipe 6 is fixed on the upper end of the filter cartridge 5, and the return air pipe 6 is connected to the gas tank at the end away from the filter cartridge 5.

[0024] Among them, the protective gas circuit includes an air inlet pipe 7 threadedly connected to the connecting pipe 3, the air inlet pipe 7 is connected to the chemical storage tank 4 at the end away from the connecting pipe 3, and also includes an air outlet pipe 8 fixed on the chemical storage tank 4, the air outlet pipe 8 is connected to the air supply pipe 1 at the end away from the chemical storage tank 4, and a solenoid valve 9 is fixed to the outside of the air inlet pipe 7, and the solenoid valve 9 can control the opening and closing of a single air inlet pipe 7, and then when no chemicals are stored in the chemical storage tank 4, the solenoid valve 9 is closed to save the power loss of the entire pipeline.

[0025] In this embodiment, the inside of the gas tank is filled with nitrogen, and an air pump is connected between the gas tank and the air duct 2. The air pump discharges the nitrogen inside the gas tank to the inside of the air duct 2, and the nitrogen inside the air duct 2 is introduced into the inside of the chemical storage tank 4 along the protective gas path, such as to protect the methane, ethane, butane and other chemicals stored in the chemical storage tank 4. When methane, ethane and butane are stored as liquids, they are generally in a gaseous state at standard atmospheric pressure and temperature. Therefore, nitrogen protection is introduced during the storage process, and the nitrogen enters the chemical storage tank 4 along the air inlet pipe 7, and at the same time, the nitrogen is discharged along the air outlet pipe 8 and re-exported into the air duct 2.

[0026] As an embodiment, the filter cartridge 5 is also fixed with a liquid inlet pipe 10 and a liquid outlet pipe 11, which are respectively fixed at the upper and lower ends of the filter cartridge 5, and a through hole 12 is provided on the outside of the air duct 2, and several through holes 12 are provided along the axial direction of the air duct 2.

[0027] The nitrogen re-entering the air duct 2 carries part of methane, ethane, butane and other gases, and the air duct 2 enters the filter cartridge 5. The filter cartridge 5 contains a non-polar liquid. The nitrogen carrying the chemical gas is introduced into the non-polar liquid. The non-polar liquid adsorbs the chemical gas carried in the nitrogen. The adsorbed nitrogen is discharged along the return air pipe 6 of the filter cartridge 5 and enters the gas storage tank again for recycling.

[0028] At the same time, when the nitrogen is discharged along the return air pipe 6, the nitrogen carries liquid water vapor inside, and then a fixing plate 13 is provided outside the return air pipe 6. The fixing plate 13 is semicircular, and there are two fixing plates 13. The two fixing plates 13 are fixed by screws, and an electric heating plate 14 is provided on the inner wall of each fixing plate 13.

[0029] The electric heating plate 14 conducts electricity in real time, heats the nitrogen carrying water vapor, evaporates the water vapor in the nitrogen, and then obtains pure nitrogen for easy circulation.

[0030] In this embodiment, the liquid inlet pipe 10 and the liquid outlet pipe 11 in the filter cartridge 5 are used for introducing and discharging the non-polar liquid respectively.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A protective gas circulation pipeline for a chemical storage warehouse, characterized in that: The protective gas circulation pipeline of the chemical storage warehouse comprises an air supply pipeline (1), one end of the air supply pipeline (1) is connected to the gas storage tank, and the other end is flange-connected to an air guide pipe (2) and is located between a filter cartridge (5) and the gas storage tank. The air supply pipeline (1) is provided with a plurality of connecting pipes (3), and the connecting pipes (3) are connected to the chemical storage tank (4) at the end away from the air supply pipeline (1), and a protective gas circuit is connected between the chemical storage tank (4) and the air supply pipeline (1). The air guide pipe (2) is plugged with a filter cartridge (5), and a return air pipe (6) is fixed to the upper end of the filter cartridge (5), and the return air pipe (6) is connected to the gas storage tank at the end away from the filter cartridge (5).

2. A protective gas circulation pipeline for a chemical storage warehouse according to claim 1, characterized in that: The protective gas circuit comprises an air inlet pipe (7) threadedly connected to the connecting pipe (3), the end of the air inlet pipe (7) away from the connecting pipe (3) being connected to the chemical storage tank (4), and also comprises an air outlet pipe (8) fixed to the chemical storage tank (4), the end of the air outlet pipe (8) away from the chemical storage tank (4) being connected to the air supply pipeline (1).

3. A protective gas circulation pipeline for a chemical storage warehouse according to claim 2, characterized in that: A solenoid valve (9) is fixed outside the air intake pipe (7).

4. The protective gas circulation pipeline for chemical storage warehouse according to claim 1 is characterized in that: The filter cartridge (5) is also fixed with a liquid inlet pipe (10) and a liquid outlet pipe (11), and the liquid inlet pipe (10) and the liquid outlet pipe (11) are respectively fixed at the upper and lower ends of the filter cartridge (5).

5. The protective gas circulation pipeline for chemical storage warehouse according to claim 1, characterized in that: The air guide tube (2) is provided with a through hole (12) on the outside, and a plurality of through holes (12) are provided along the axial direction of the air guide tube (2).

6. The protective gas circulation pipeline for chemical storage warehouse according to claim 1, characterized in that: The return air pipe (6) is provided with a fixing plate (13) on the outside. The fixing plate (13) is semicircular. Two fixing plates (13) are provided. The two fixing plates (13) are fixed with screws. An electric heating plate (14) is provided on the inner wall of each fixing plate (13).

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