High-pressure gas filtering system

Abstract

The utility model belongs to the technical field of gas filtering devices, and particularly relates to a high-pressure gas filtering system which comprises a first-stage filtering cylinder, a second-stage filtering cylinder and a third-stage filtering cylinder group which are connected with one another, the first-stage filtering cylinder is a wet filter filled with filtering liquid, the second-stage filtering cylinder is an agglomerated filter, and the third-stage filtering cylinder group is a wet filter filled with filtering liquid. The third-stage filter cartridge group comprises a plurality of third-stage filter cartridges which are connected in series, and the third-stage filter cartridges are adsorption filters. The filtering system disclosed by the utility model has the advantages that the filtering is efficient, the air quality is improved, and various impurities in the compressed air are purified step by step through a three-stage filtering mechanism of the first-stage filtering cylinder (wet filter), the second-stage filtering cylinder (condensation filter) and the third-stage filtering cylinder group (adsorption filter). Dust and oil mist particles with the size being 5 micrometers or above are removed through first-stage filtration, liquid water and oil are treated through second-stage filtration, residual oil water vapor and peculiar smell are further removed through third-stage filtration, the quality of compressed air is remarkably improved, and reliable quality guarantee is provided for compressed air for breathing.

Description

High-pressure gas filtration system Technical Field

[0001] This utility model relates to a high-pressure gas filtration system and belongs to the technical field of gas filtration devices. Background Technology

[0002] An air respirator is a self-contained open-circuit breathing apparatus widely used in firefighting, chemical, shipbuilding, petroleum, metallurgical, warehouse, laboratory, and mining industries to ensure the safety and effectiveness of firefighters and rescue personnel in various environments, including those with dense smoke, toxic gases, steam, or oxygen deficiency, during firefighting, rescue, and medical operations. If the quality of the gas supplied by the respirator is substandard or contaminated, it will directly impact the life and health of the user. Therefore, the high-pressure air filtration system is a critical safety barrier for air respirators, and its filtration efficiency, stability, and reliability are of paramount importance.

[0003] Existing high-pressure filters use a cartridge design, such as the one disclosed in publication number "CN218166358U". However, this is a single-cartridge filter, which can only achieve basic physical interception. Its filtration mechanism is simple, resulting in limited purification and poor filtration efficiency. Therefore, a new filtration solution is urgently needed to improve the quality of the supplied gas and protect the health and safety of users. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a high-pressure gas filtration system with increased filtration area and gas flow, resulting in a better filtration effect.

[0005] The high-pressure gas filtration system of this utility model includes a primary filter cartridge, a secondary filter cartridge, and a tertiary filter cartridge assembly connected in series. The primary filter cartridge is a wet filter containing filtrate, the secondary filter cartridge is a coagulation filter, and the tertiary filter cartridge assembly includes multiple tertiary filter cartridges connected in series. The tertiary filter cartridges are adsorption filters. All filter cartridges are vertical filter cartridges.

[0006] This system is used in the series pipeline between the gas storage system and the testing equipment. It forms a triple breathing air purification through liquid filtration, gas-liquid separation (liquid condensation and discharge), and activated carbon / molecular sieve adsorption. It effectively filters various impurities in compressed air, improves the quality of high-pressure compressed air for testing, and also provides quality assurance for the compressed breathing gas filled in.

[0007] Step-by-step purification for efficient removal of pollutants. The entire system employs a three-stage filtration principle, ensuring high-efficiency and thorough filtration. It removes different impurities in stages: the first stage uses liquid filtrate to effectively remove dust and oil mist particles larger than 5μm from compressed gas; the second stage uses a coagulation filter to handle liquid water and oil, separating liquid impurities carried out from the first stage and outputting dry gas to the next stage; the third stage uses ultra-fine filtration with activated carbon / molecular sieve adsorption to remove residual oil and water vapor and odors.

[0008] The three-stage filter cartridge group consists of two sets, which are connected in parallel, greatly increasing the filtration area and gas flow.

[0009] Specifically, the lower end of the primary filter cartridge is the air inlet, which is connected to the air inlet pipe. The air inlet pipe is equipped with an air source valve and an air source pressure gauge. The upper end of the primary filter cartridge is the air outlet, which is connected to the secondary filter cartridge through a first connecting pipe. The secondary filter cartridge is connected to two sets of tertiary filter cartridges through a second connecting pipe. The air outlets of the two sets of tertiary filter cartridges are connected to the air outlet pipes, which are equipped with an air outlet pressure gauge and a safety valve. The safety valve prevents excessive output air pressure from damaging downstream equipment.

[0010] The first-stage filter cartridge is equipped with a one-way valve at the air inlet and a shut-off valve at the air outlet. The one-way valve prevents liquid from flowing back into the air source pipeline; after the shut-off valve is closed, it is convenient to replace the liquid in the first-stage filter media in a timely manner (because the air volume of the entire system is too large, the first-stage filter media needs to be replaced frequently, so when replacing the first-stage filter media, only the first-stage cartridge needs to be isolated from the system and the pressure inside the first-stage cartridge needs to be released).

[0011] The first and third filter cartridges of the three-stage filter assembly are equipped with three-stage one-way valves at their air outlets to prevent backflow of air pressure at the rear end when the first cartridge of the first, second, and third stages discharges wastewater because the pressure at the front end is lower than the pressure at the rear end.

[0012] The exhaust pipe is connected to a vent pipe and an output pipe, which are connected in parallel. The vent pipe is equipped with a vent valve for easy venting of the system; the output pipe is equipped with an output valve.

[0013] The primary filter cartridge is equipped with a water injection valve and a horizontal valve, which are located at the same height.

[0014] The advantages of this utility model compared with the prior art are:

[0015] The high-pressure gas filtration system described in this utility model achieves efficient filtration and improves gas quality. Through a three-stage filtration mechanism consisting of a primary filter cartridge (wet filter), a secondary filter cartridge (condenser filter), and a tertiary filter cartridge group (adsorption filter), it achieves progressive purification of various impurities in compressed air. The primary filter removes dust and oil mist particles larger than 5μm, the secondary filter treats liquid water and oil, and the tertiary filtration further removes residual oil and water vapor and odors, significantly improving compressed air quality and providing reliable quality assurance for breathing compressed gas. Progressive purification removes contaminants in layers: The system removes different impurities in stages, making the filtration process more efficient and thorough. This progressive purification method helps reduce the burden on the filter media and extends its service life. Easy maintenance and filter media replacement: The one-way valve and shut-off valve in the system facilitate the isolation of the corresponding filter cartridge from the system when replacing the filter media, thereby releasing the internal pressure and simplifying the maintenance process and improving work efficiency. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the structural principle of this utility model;

[0017] Figure 2 is a schematic diagram of the three-stage filter cartridge.

[0018] In the diagram: 1. Air source valve; 2. Air inlet pipe; 3. Air source pressure gauge; 4. First-stage check valve; 5. First-stage filter cartridge; 6. Water injection valve; 7. Horizontal valve; 8. First-stage drain valve; 9. Shut-off valve; 10. First connecting pipe; 11. Second-stage filter cartridge; 12. Second-stage drain valve; 13. Second connecting pipe; 14. Third-stage filter cartridge; 14.1. Outer cylinder; 14.2. Filter cartridge; 14.3. Filter element; 14.4. Bottom cover; 15. Third-stage filter cartridge assembly; 16. Third-stage drain valve; 17. Third-stage check valve; 18. Air outlet pipe; 19. Drain pipe; 20. Drain valve; 21. Output pipe; 22. Output valve; 23. Air outlet pressure gauge; 24. Safety valve. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments.

[0020] The description of this utility model is merely a structural or even functional description of the embodiments, and the scope of this utility model is not limited by the embodiments described herein.

[0021] As shown in Figures 1 and 2, this embodiment is achieved through the following technical solution: a high-pressure gas filtration system, including a first-stage filter cylinder 5, a second-stage filter cylinder 11 and a third-stage filter cylinder group 15 connected to each other, all of which are vertical filter cylinders.

[0022] The primary filter cartridge 5 is a wet filter containing filtrate. A water injection valve 6 and a horizontal valve 7 are located in the middle, at the same height. A primary drain valve 8 is located at the bottom for draining the internal filtrate.

[0023] The secondary filter cartridge 11 is a coagulation filter, adopting the structure of a high-pressure filter cartridge with publication number "CN218166358U", which will not be described in detail here.

[0024] The three-stage filter cartridge assembly 15 includes multiple three-stage filter cartridges 14 connected in series, each cartridge being an adsorption filter. There are two sets of three-stage filter cartridge assemblies 15 connected in parallel. Each three-stage filter cartridge 14 includes an outer cylinder 14.1 with a removable bottom cover 14.4 at its lower end. A filter element 14.3 is housed inside a filter cartridge 14.2, which is detachably mounted on the bottom cover 14.4. The bottom cover 14.4 can be unscrewed to remove the filter cartridge 14.2. The air inlet of the three-stage filter cartridge 14 is located in the middle of the outer cylinder 14.1. As air enters, it impacts the wall of the filter cartridge 14.2. Moisture and oil particles in the air adhere to the wall and flow downwards, while the air rises, entering the filter element 14.3 from the top of the filter cartridge 14.2 and then flowing downwards through the filter element 14.3, exiting from the bottom outlet.

[0025] System connection method: The lower end of the primary filter cartridge 5 is the air inlet, and the upper end is the air outlet. The air inlet is connected to the air inlet pipe 2, which is equipped with an air source valve 1 and an air source pressure gauge 3. The air inlet of the primary filter cartridge 5 is equipped with a primary one-way valve 4 to prevent liquid backflow into the air inlet pipe 2. The air outlet is equipped with a shut-off valve 9 to facilitate timely replacement of the primary filter media liquid (because the entire system has a large air volume, the primary filter media needs to be replaced frequently. Therefore, when replacing the primary filter media, the shut-off valve 9 is closed to release the pressure inside the primary cartridge, thus preventing pressure loss in subsequent pipelines of the system). The air outlet of the first-stage filter cartridge 5 is connected to the second-stage filter cartridge 11 via the first connecting pipe 10. The second-stage filter cartridge 11 is connected to two sets of tertiary filter cartridge groups 15 via the second connecting pipe 13. The bottom of the first filter cartridge of the tertiary filter cartridge group 15 is equipped with a tertiary drain valve 16 (only the first filter cartridge of the tertiary stage is equipped with a drain port because the first filter cartridge may have a small amount of sewage. After passing through the first filter cartridge, there are basically no visible pollutants. Therefore, the latter two filter cartridges do not need to be equipped with drain ports, which reduces manufacturing difficulty and cost). The air outlets of the first and third filter cartridges of the tertiary filter cartridge group 15 are equipped with tertiary one-way valves 17 to prevent backflow of air pressure at the rear end when the first, second, and third stage first cartridges are drained because the pressure at the front end is lower than the pressure at the rear end (because the filter element in the tertiary filter cartridge adopts a forward airflow pressing and compaction structure, and the reverse airflow may push the filter material out). The outlet ends of the two sets of three-stage filter cartridges 15 are connected to the outlet pipe 18. The outlet pipe 18 is equipped with an outlet pressure gauge 23 and a safety valve 24 to prevent excessive output air pressure from damaging downstream equipment. The outlet pipe 18 is connected to a vent pipe 19 and an output pipe 21, which are connected in parallel. The vent pipe 19 is equipped with a vent valve 20 for easy venting of the system. The output pipe 21 is equipped with an output valve 22.

[0026] This utility model provides step-by-step purification, efficiently removing contaminants. The entire system employs a three-stage filtration system, ensuring high-quality and thorough filtration by removing different impurities in stages and layers. The first stage uses liquid filtrate to effectively remove dust and oil mist particles larger than 5μm from compressed gas, protecting subsequent filters and extending their service life. The second stage is a condensation filter that can handle liquid water and oil, separating liquid impurities carried over from the first stage and outputting dry gas to the next stage, reducing the filtration burden on subsequent stages. The third stage uses ultra-fine filtration with activated carbon / molecular sieve adsorption to remove residual oil and water vapor and odors. This filtration system uses three filter cartridges connected in series, significantly increasing the filtration area and gas flow. It has strong adsorption capacity, especially for polar molecules (water, carbon dioxide, hydrogen sulfide).

[0027] Operating method

[0028] ①Connection

[0029] The device is connected in series to a compressed air pipeline. The air source can be an air compressor, an air storage cylinder group, etc., and the output can be connected to an air storage cylinder group, testing equipment, an air filling box, etc. The inlet pipeline 2 is connected to the air source port interface, and the output pipeline 21 is connected to the output port interface.

[0030] ② Filter media filling

[0031] Primary filtration. Close the primary drain valve 8, open the water inlet valve 6 and the horizontal valve 7, and slowly inject the filtrate (which can be water) into the primary filter cartridge 5 through the water inlet valve 6. Stop adding liquid when liquid flows out of the horizontal valve 7. Close the water inlet valve 6 and the horizontal valve 7.

[0032] Secondary filtration. Connect filter element A (500-60-M) to the top cover of the filter cartridge, insert it as a whole, and tighten it to seal.

[0033] Three-stage filtration. Connect filter element B (630-75-CS) to the bottom cover of the filter cartridge, insert it as a whole, and tighten it to seal.

[0034] It is reusable and the filter cartridge and filter media can be easily replaced.

[0035] ③ Operation

[0036] Before use, ensure that the first-stage drain valve 8, the second-stage drain valve 12, the third-stage drain valve 16, the output valve 22, and the vent valve 20 are closed. Slowly open the air source valve 1 and observe the air source pressure gauge 3 to allow the air source pressure to rise slowly. Then observe the outlet pressure gauge 23 to fill the system with compressed gas. Finally, open the output valve 22 for subsequent use.

[0037] Of course, the above description is only a preferred embodiment of this utility model and should not be considered as limiting the scope of the embodiments of this utility model. This utility model is not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of this utility model should be included in the patent coverage of this utility model.

Claims

1. A high-pressure gas filtration system, characterized in that, It includes a first-stage filter cartridge (5), a second-stage filter cartridge (11), and a third-stage filter cartridge group (15) connected together. The first-stage filter cartridge (5) is a wet filter containing filtrate, the second-stage filter cartridge (11) is a coagulation filter, and the third-stage filter cartridge group (15) includes multiple third-stage filter cartridges (14) connected in series. The third-stage filter cartridges (14) are adsorption filters. All filter cartridges are vertical filter cartridges.

2. The high pressure gas filtration system of claim 1, wherein, The three-stage filter cartridge group (15) consists of two groups, and the two groups of three-stage filter cartridge groups (15) are connected in parallel.

3. The high-pressure gas filtration system according to claim 2, characterized in that, The lower end of the primary filter cartridge (5) is the air inlet end, which is connected to the air inlet pipe (2). The air inlet pipe (2) is equipped with an air source valve (1) and an air source pressure gauge (3). The upper end of the primary filter cartridge (5) is the air outlet end, which is connected to the secondary filter cartridge (11) through the first connecting pipe (10). The secondary filter cartridge (11) is connected to two sets of tertiary filter cartridge groups (15) through the second connecting pipe (13). The air outlet ends of the two sets of tertiary filter cartridge groups (15) are connected to the air outlet pipe (18). The air outlet pipe (18) is equipped with an air outlet pressure gauge (23) and a safety valve (24).

4. The high pressure gas filtration system of claim 3, wherein, The inlet end of the primary filter cartridge (5) is equipped with a primary one-way valve (4), and the outlet end is equipped with a shut-off valve (9).

5. The high-pressure gas filtration system according to claim 3, characterized in that, The first and third filter cartridges of the three-stage filter cartridge assembly (15) are equipped with three-stage one-way valves (17) at their outlet ends.

6. The high pressure gas filtration system of claim 3, wherein, The exhaust pipe (18) is connected to the vent pipe (19) and the output pipe (21). The vent pipe (19) and the output pipe (21) are connected in parallel. The vent pipe (19) is equipped with a vent valve (20), and the output pipe (21) is equipped with an output valve (22).

7. The high-pressure gas filtration system according to any one of claims 1 to 6, characterized in that, The primary filter cartridge (5) is equipped with a water injection valve (6) and a horizontal valve (7), and the water injection valve (6) and the horizontal valve (7) are at the same height.

Images