CN114682061B - A marine high-pressure air drying and purification system - Google Patents

Abstract

The invention relates to a marine high-pressure air drying and purifying system which comprises an air inlet, a separation and purification module, a preposed pressure retaining valve, a drying module, a post-treatment module and an air outlet, wherein the separation and purification module comprises an oil-water separator, a first filter and a second filter; untreated compressed air enters the separation and purification module from the air inlet to be subjected to oil-water separation, then enters the drying module to be dried after high pressure is formed through the preposed pressure retaining valve, and finally reaches the air outlet after dust is removed through the post-treatment module; the invention adopts a high-pressure compression oil-water removal method, a centrifugal separation method and an oil mist purification method, and adds a preposed pressure retaining valve after the separation and purification module, so that the separation and purification module initially works in a high-pressure state, oil and water in untreated compressed air are thoroughly separated and then enter a drying tower, a phenomenon that a large amount of oil and water enter the drying tower to pollute the molecular sieve in a low-pressure boosting stage is avoided, the service life of the molecular sieve is effectively prolonged, the quality of compressed air of a user is ensured, and the working efficiency of the system is improved.

Description

A marine high-pressure air drying and purification system

technical field

The invention relates to the technical field of high-pressure air drying and purification, in particular to a marine high-pressure air drying and purification system.

Background technique

The marine high-pressure air drying and purification system adopts the working principle of micro-heat regeneration adsorption, that is, the two towers work in a cycle, one tower is adsorbed at high pressure, and the other tower is regenerated at low pressure and micro-heat. At present, when the marine high-pressure air drying and purification system in the prior art starts to work, it takes a certain time to increase the pressure from low pressure to high pressure. In the stage of low pressure and large displacement, the filtering effect of the pre-filter is very poor, and a large amount of oil and water cannot be obtained. Separation directly enters the drying tower. A large amount of oil mist and moisture will cause the molecular sieve in the drying tower to be "poisoned" and fail. In this way, the molecular sieve needs to be replaced frequently, the service life of the molecular sieve is greatly reduced, and the compressed air quality of the user cannot be obtained. guarantee, while reducing the working efficiency of the drying and purification system; and, during the use of the existing pre-filter, as time goes by, larger solid particles and oil droplets will remain inside the pre-filter, making the pre-filter The filtration efficiency of the built-in filter is greatly reduced, further reducing the working efficiency of the system.

Therefore, how to effectively extend the life of molecular sieves, ensure the quality of compressed air for users, and improve the working efficiency of the system is a technical problem to be solved.

Contents of the invention

The technical problem to be solved by the present invention is to provide a marine high-pressure air drying and purification system with simple structure, which can effectively prolong the life of molecular sieves, ensure the quality of compressed air for users, and improve the working efficiency of the system.

The technical solution adopted in the present invention is a marine high-pressure air drying and purification system, which includes a system body, the system body includes an air inlet for compressed air to enter, separation and purification modules arranged in sequence along the air inlet direction of the air inlet, Pre-pressure holding valve, drying tower module, post-processing module and exhaust port, the separation and purification module includes an oil-water separator, a first filter and a second filter, the inlet end of the oil-water separator is connected to the compressed air The air inlet of the oil-water separator is connected with the air inlet of the first filter, the air outlet of the first filter is connected with the air inlet of the second filter, the air outlet of the second filter is connected with the front The air inlet of the pre-pressure maintaining valve is connected, the air outlet of the front pressure maintaining valve is connected with the air inlet of the drying module, the air outlet of the drying module is connected with the air inlet of the post-processing module, and the air outlet of the post-processing module is connected with the exhaust port. The air port is connected; the oil-water separator is an oil-water separator that separates solid particles, liquid droplets and oil droplets in the compressed air by means of spiral centrifugal separation, and the first filter is filtered by a porous ceramic filter element The first filter, the second filter is a second filter that adopts an activated carbon filter element to filter; the pre-pressure maintaining valve is used to keep the separation and purification module in a high pressure state during initial operation.

The beneficial effects of the present invention are: the marine high-pressure air drying and purification system with the above structure is adopted, and a pre-pressure maintaining valve is added after the separation and purification module, so that the whole high-pressure air drying and purifying system achieves the purpose of high-pressure compression to remove oil and water, and the pre-pressure maintaining valve The valve can make the separation and purification module work in a high-pressure state initially, and its opening pressure is set between 1/2 and 2/3 of the maximum working pressure, so that the oil-water separator, the first filter and the second filter are initially Working in a high-pressure state, the oil and water in the high-pressure humid air can be completely separated before entering the drying tower, avoiding the "poisoning" failure of the molecular sieve caused by the poor filtration effect of the separation and purification module in the low-pressure boosting stage, effectively extending the life of the molecular sieve and ensuring The compressed air quality of the user improves the working efficiency of the system; at the same time, the oil-water separator using the spiral centrifugal separation in the present invention replaces the pre-filter in the original technology, avoiding the accumulation of larger solid particles, liquid droplets and oil droplets in the The inside of the filter element cannot be drained out, causing clogging, which improves the filtration efficiency and also prolongs the life of the molecular sieve, thereby improving the working efficiency of the system; in addition, the porous ceramic filter element passing through the first filter in the present invention has a certain particle Finely filter the compressed air of oil and water sol particles, and then use the activated carbon filter element of the second filter to absorb the remaining traces of oil mist in the compressed air, so as to prevent traces of oil and water from entering the drying tower and polluting molecular sieves. , effectively prolong the life of molecular sieves.

Preferably, the oil-water separator includes a separator body, a first joint connected to the inlet end of the separator body, a second joint connected to the gas outlet end of the separator body, a spiral centrifugal separator core arranged inside the separator body, and a set The first sewage passage at the bottom of the separator body and communicated with the interior of the separator body; the spiral centrifugal separator core includes a core body connected in the separator body and a first exhaust passage arranged inside the core body , the first joint communicates with the air inlet, one end of the first exhaust channel communicates with the interior of the separator body, and the other end of the first exhaust channel communicates with the first filter through a second joint. With this structure, the wet compressed air enters the separator body through the first joint, and the core of the spiral centrifugal separator rotates at a high speed, and the larger solid particles, oil droplets and liquid droplets in the wet compressed air are thrown to the separator due to centrifugal force. The wall inside the separator body, then falls along the wall, and finally is discharged through the first sewage channel, and the separated compressed air enters the first filter through the first exhaust channel and the second joint in turn, reaching the spiral filter. The purpose of centrifugal separation, so that the larger solid particles, oil droplets and liquid droplets in the wet compressed air can be effectively discharged, effectively prolonging the life of molecular sieves, improving filtration efficiency, ensuring the quality of compressed air for users, and improving system work efficiency.

Preferably, the first filter includes a first filter body, a third joint connected to the inlet end of the first filter body, a fourth joint connected to the air outlet end of the first filter body, and a fourth joint arranged at the bottom of the first filter body and connected to the second filter body. A second sewage channel connected inside the filter body; the porous ceramic filter element is arranged inside the first filter body, and the porous ceramic filter element includes the first filter element body and the second filter element arranged in the first filter element body and communicated with the third joint In the exhaust channel, the third joint communicates with the second joint through a pipeline, and the second exhaust channel communicates with the fourth joint through a porous ceramic filter element. With this structure, the compressed air enters the second exhaust channel through the third joint, and the porous ceramic filter element filters out the oil and water sol particles with a certain particle size in the compressed air, and then enters the second exhaust channel through the fourth joint. In the filter, its filtration efficiency reaches 98%, and the filtration efficiency is high, which can effectively prolong the life of the molecular sieve, ensure the quality of compressed air for users, and improve the working efficiency of the system.

Preferably, the second filter further includes a second filter body, a fifth joint connected to the inlet end of the second filter body, a sixth joint connected to the air outlet end of the second filter body, and a second filter body arranged at the bottom of the second filter body and connected to the second filter body. The third sewage channel connected inside the second filter body, the activated carbon filter element is arranged inside the second filter body, and the activated carbon filter element includes the second filter element body and the third filter element arranged in the second filter element body and communicated with the fourth joint In the exhaust passage, the fifth joint communicates with the fourth joint through a pipeline, the third exhaust passage communicates with the sixth joint through an activated carbon filter element, and the sixth joint communicates with the intake end of the pre-pressure maintaining valve. With this activated carbon oil mist purification method, the compressed air enters the third exhaust channel through the fifth joint, and the activated carbon filter element absorbs the trace oil mist remaining in the compressed air, and the filtration efficiency reaches 99.999%. Extend the life of the molecular sieve, ensure the compressed air quality of the user, and improve the working efficiency of the system.

Preferably, the drying module includes a first drying tower, a first two-position three-way valve, a second drying tower, a second two-position three-way valve and a silencer, and the first two-position three-way valve and the second two-position three-way valve The two-position three-way valves are all controlled by PLC, the air inlet of the first two-position three-way valve is controlled by PLC to communicate with the air outlet of the pre-pressure maintaining valve, and the air intake of the second two-position three-way valve is controlled by PLC. The two gas outlets of the first two-position three-way valve are controlled by PLC and used to communicate with the muffler and the first drying tower respectively; the second The two outlets of the two-position three-way valve are controlled by PLC to communicate with the muffler and the second drying tower respectively; when the PLC controls the inlet end of the first two-position three-way valve to open, the first two-position three-way The inlet end of the valve is connected to the outlet end of the pre-pressure maintaining valve. At this time, the PLC controls the opening of the outlet end of the first two-position three-way valve connected to the first drying tower, and the PLC controls the first two-position three-way valve connected to the muffler. The outlet end of the three-way valve is closed, the PLC controls the inlet end of the second two-position three-way valve to close, and the PLC controls the outlet end of the second two-position three-way valve connected to the muffler to open; when the PLC controls the second two-position three-way valve to open; When the inlet end of the through valve is opened, the second two-position three-way valve communicates with the outlet end of the pre-pressure maintaining valve. At this time, the PLC controls the opening of the second two-position three-way valve connected to the second drying tower. PLC controls the intake end of the first two-position three-way valve to close, PLC controls the opening of the outlet end of the first two-position three-way valve connected to the muffler, and PLC controls the opening of the second two-position three-way valve connected to the muffler The air outlet is closed. With this structure, the compressed air output from the pre-pressure maintaining valve is dried through the first drying tower or the second drying tower. When the high-pressure air output from the pre-pressure maintaining valve passes through the first drying tower for drying, the second The molecular sieve in the second drying tower is in a regeneration state. After the molecular sieve is regenerated, the polluted air is output from the second drying tower through the silencer; when the high-pressure air output by the pre-pressure maintaining valve passes through the second drying tower for drying, The molecular sieve in the first drying tower is in regeneration state. After the molecular sieve is regenerated, the polluted air is output from the first drying tower through the silencer; the structure is simple and the working efficiency is high.

Preferably, the post-processing module further includes a first one-way valve, a second one-way valve, a post-filter and a post-pressure maintaining valve, and the inlet end of the first one-way valve communicates with the first drying tower , the gas outlet of the first one-way valve communicates with the inlet of the post-filter, the gas inlet of the second one-way valve communicates with the second drying tower, and the gas outlet of the second one-way valve It communicates with the inlet end of the rear filter, the inlet end of the rear pressure maintaining valve communicates with the outlet end of the rear filter, the outlet end of the rear pressure maintaining valve communicates with the exhaust port, and the The post-processing module also includes a first heater, a second heater, a third one-way valve, a fourth one-way valve, and a pressure reducing valve, the inlet end of the pressure reducing valve communicates with the outlet end of the rear pressure-preserving valve , the outlet end of the decompression valve communicates with the inlet end of the third one-way valve and the inlet end of the fourth one-way valve respectively, and one end of the first heater communicates with the outlet end of the third one-way valve The other end communicates with the first drying tower, one end of the second heater communicates with the gas outlet of the fourth check valve, and the other end communicates with the second drying tower; when the first drying tower is connected by the first two-position three The high-pressure air output from the air outlet of the through valve is dried. The dried air is output from the first drying tower and passes through the post-filter and the post-pressure maintaining valve in sequence. The other part enters the pressure reducing valve, and the high-pressure air output by the pressure reducing valve enters the second heater through the fourth one-way valve, and is heated by the second heater and enters the second drying tower for the air in the second drying tower. The molecular sieve is regenerated; when the second drying tower dries the high-pressure air output from the outlet end of the second two-position three-way valve, the dried air is output by the second two-position three-way valve and passes through the post-filter and the post-filter in sequence. Set the pressure maintaining valve, part of the high-pressure air output by the rear pressure maintaining valve is discharged through the exhaust port, and the other part enters the pressure reducing valve, and the high pressure air output by the pressure reducing valve enters the first heater through the third one-way valve, and After being heated by the first heater, it enters the first drying tower for regeneration of the molecular sieve in the first drying tower. With this structure, the first one-way valve is used to output the dry air of the first drying tower, the second one-way valve is used to output the dry air of the first drying tower, and the post-filter is used to use the first one-way valve or the second The dry air output by the one-way valve is dust-filtered, and then the filtered air is output to the rear pressure-holding valve, and the rear-mounted pressure-holding valve finally discharges the purified dry air through the exhaust port. A post-pressure maintaining valve is set between the filters, which can effectively prevent the high-speed airflow formed when the system back pressure is too low (such as boosting the pressure of the gas cylinder) to impact the molecular sieve bed and break the molecular sieve This will effectively prolong the service life of the molecular sieve and improve the working efficiency of the system; the pressure reducing valve is used to deliver the dry air output from the rear pressure maintaining valve to the third one-way valve or the fourth one-way valve, The third one-way valve is used to input the dry air into the first drying tower after being heated by the first heater, and the fourth one-way valve is used to input the dry air into the second drying tower after being heated by the second heater. tower; when the first drying tower or the second drying tower is in the adsorption state, the dry air will output the dry air through the corresponding first check valve or the second check valve, and then pass through the post-filter, post-protection Pressure valve and exhaust port output; when one of the drying towers in the first drying tower and the second drying tower is in the adsorption state, then the other drying tower is in the regeneration state; at this time, the corresponding second drying tower or When the first drying tower is in the regeneration state, part of the dry air output from the rear pressure-holding valve will pass through the pressure reducing valve, then pass through the fourth check valve or the third check valve and enter the second drying tower after being heated. Or the molecular sieve can be regenerated in the first drying tower. The structure is simple, the operation is convenient, the service life of the molecular sieve can be effectively extended, and the working efficiency of the system can be improved.

Preferably, the system body further includes a first sewage discharge solenoid valve, a first manual sewage discharge valve and a sewage discharge port, one end of the first sewage discharge solenoid valve is respectively connected to the oil-water separator, the first filter and the second filter, The other end is connected to the sewage outlet, one end of the first manual sewage valve is respectively connected to the oil-water separator, the first filter and the second filter, and the other end is connected to the sewage outlet. With this structure, the sewage outlet can separate oil and water The oil, water and solid particles discharged from the filter, the first filter and the second filter are discharged out of the system. The structure is simple and the operation is convenient.

Preferably, the system body also includes a second blowdown solenoid valve and a second manual blowdown valve, one end of the second blowdown solenoid valve is connected to the rear filter, the other end is connected to the blowdown port, and the second manual blowdown valve One end of the dynamic drain valve is connected to the rear filter, and the other end is connected to the sewage outlet. With this structure, the sewage outlet can discharge the oil, water and solid particles filtered by the rear filter out of the system. The structure is simple and easy to operate. .

Description of drawings

Fig. 1 is a block diagram of a kind of marine high-pressure air drying and purification system of the present invention;

Fig. 2 is the structural representation of a kind of marine high-pressure air drying purification system of the present invention;

Fig. 3 is the structural representation of separation and purification module in the present invention;

As shown in the figure: 1. Air inlet; 2. Separation and purification module; 3. Drying module; 4. Exhaust port; 5. Oil-water separator; 6. First filter; 7. Second filter; 8. Sewage outlet; 9. Separator body; 10. First connector; 11. Second connector; 12. Spiral centrifugal separator core; 13. First sewage channel; 14. Core body; 15. First exhaust channel; 16. The first sewage solenoid valve; 17. The first filter body; 18. The third joint; 19. The fourth joint; 20. The second sewage channel; 21. The porous ceramic filter element; 22. The second exhaust channel; 23. The second filter body; 24, the fifth joint; 25, the sixth joint; 26, the third sewage passage; 27, the activated carbon filter element; 28, the third exhaust passage; 29, the first manual sewage valve; Pressure valve; 31. The first drying tower; 32. The first two-position three-way valve; 33. The second drying tower; 34. The second two-position three-way valve; 35. Muffler; 36. The first heater; 37 , the second heater; 38, the first one-way valve; 39, the second one-way valve; 40, the rear filter; 41, the rear pressure maintaining valve; 42, the third one-way valve; 43, the fourth one-way valve Directional valve; 44. Pressure reducing valve; 45. Throttle valve; 46. Dew point meter; 47. Second manual sewage valve; 48. Second sewage solenoid valve; 49. First filter body; 50. Second filter body ; 51, the post-processing module; 52, the outlet joint of the pre-pressure maintaining valve.

Detailed ways

The invention will be further described below with reference to the accompanying drawings and in combination with specific embodiments, so that those skilled in the art can implement it by referring to the description, and the protection scope of the present invention is not limited to the specific embodiments.

Those skilled in the art should understand that, in the disclosure of the present invention, the terms "vertical", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and The above terms should not be construed as limiting the present invention because the description is simplified rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation.

The invention relates to a marine high-pressure air drying and purification system, which includes a system body. As shown in Figure 1, the system body includes an air inlet 1 for compressed air to enter, and a separation and purification system sequentially connected along the air inlet direction of the air inlet 1. Module 2, the drying module 3 connected to the separation and purification module 2, the post-processing module connected to the drying module 3, and the exhaust port 4 connected to the post-processing module 51, the separation and purification module 2 includes oil-water connected to the air inlet The separator 5, the first filter 6 connected to the oil-water separator 5 and the second filter 7 connected to the first filter 6 at one end and connected to the drying module 3 at the other end, the oil-water separator 5 is separated by centrifugation To separate solid particles, liquid droplets and oil droplets in the compressed air, the first filter 6 includes a porous ceramic filter element 21 , and the second filter 7 includes an activated carbon filter element 27 .

In the marine high-pressure air drying and purification system of the structure shown in Figure 1, the wet compressed air passing through the air inlet 1 first passes through the oil-water separator 5, and the oil-water separator 5 uses a spiral centrifugal separation method to separate the larger solid particles in the wet compressed air, Oil droplets and liquid droplets are separated, and then pass through the porous ceramic filter element 21 of the first filter 6 for further fine filtration, to filter oil and water sol particles with a certain particle size, and then pass through the activated carbon of the second filter 7 The filter element 27 is further finely filtered, and the activated carbon filter element 27 is used to absorb the trace oil mist remaining in the compressed air, so that the oil and water can be prevented from entering the drying tower and polluting the molecular sieve, effectively prolonging the life of the molecular sieve and ensuring the safety of users. Compressed air quality, improve system working efficiency; the original technology uses a pre-filter to filter the wet compressed air, avoiding the accumulation of larger solid particles, liquid droplets and oil droplets inside the filter element and cannot be discharged , the situation of causing blockage occurs, and the filtration efficiency is improved. The use of the pre-filter is canceled in the present invention, and the spiral centrifugal separation method is used to replace the traditional filtration method in the primary separation, and the oil-water separator 5 replaces the traditional pre-filter. The oil-water separator 5 removes larger solid particles, liquid droplets and oil droplets through the action of centrifugal force, avoiding the internal clogging of the traditional pre-filter, thereby ensuring the reliability of the oil-water separation system and effectively extending the molecular sieve. lifespan.

As shown in Figure 2, the system body also includes a pre-pressure maintaining valve 30, one end of the pre-pressure maintaining valve 30 is connected to the second filter 7, and the other end is connected to the drying module 3, and the drying module 3 includes The first drying tower 31, the first two-position three-way valve 32, the second drying tower 33, the second two-position three-way valve 34 and the muffler 35, the inlet end of the first two-position three-way valve 32 is connected to the front The pressure maintaining valve 30 is connected, the exhaust end of the first two-position three-way valve 32 is connected with the muffler 35, and the exhaust end 4 of the first two-position three-way valve 32 is connected to one end of the first drying tower 31 The inlet end of the second two-position three-way valve 34 is connected to the pre-pressure maintaining valve 30, the exhaust end of the second two-position three-way valve 34 is connected to the muffler 35, and the second two-position three-way valve 34 is connected to the muffler 35. The exhaust port 4 of the three-way valve 34 is connected to one end of the second drying tower 33 .

In Fig. 2, a pre-pressure maintaining valve 30 is set between the second filter 7 and the drying module 3, and the compressed air enters the drying tower through the pre-pressure maintaining valve 30. The pressure valve 30 is arranged after the second filter 7, and its opening pressure is set between 1/2～2/3 of the maximum working pressure, so that the oil-water separator 5, the first filter 6, and the second filter 7 Always work in a high-pressure state, which can completely separate the oil and water in the high-pressure humid air before entering the drying tower, avoiding the "poisoning" failure of the molecular sieve caused by the poor filtering effect of the filter in the low-pressure boosting stage. The initial pressure of the air compressor to the gas cylinder is very low. It takes about 3 to 5 hours for the air compressor to inflate the gas cylinder. The 1 hour before inflation is the low-pressure boost stage. According to preliminary calculations, at 45°C, 1Kg wet compression under 1MPa pressure The moisture content of the air is about 15 times that under the pressure of 20MPa.

The present invention introduces a method of high-pressure compression to remove oil and water, and adds a pre-pressure holding valve after the separation and purification module 2, so that the separation and purification module 2 initially works in a high-pressure state, so that the oil and water in the untreated compressed air are completely separated before entering the drying tower, avoiding It prevents a large amount of oil and water from entering the drying tower to pollute the molecular sieve during the low-pressure boost stage, effectively prolonging the life of the molecular sieve, ensuring the quality of compressed air for users, and improving the working efficiency of the system.

As shown in Figure 3, the oil-water separator 5 includes a separator body 9, a first joint 10, a second joint 11, a spiral centrifugal separator core 12 arranged inside the separator body 9, and a spiral centrifugal separator core 12 arranged at the bottom of the separator body 9. The first sewage passage 13, the spiral centrifugal separator core 12 includes a core body 14 and a first exhaust passage 15 arranged inside the core body 14, one end of the first joint 10 communicates with the air inlet 1, The other end communicates with the interior of the separator body 9, one end of the first exhaust channel 15 communicates with the interior of the separator body 9, and the other end communicates with the second joint 11, the second joint 11 communicates with the first filter 6, and the first The joint 10 communicates with the second joint 11 through the spiral centrifugal separation core. With this structure, the wet compressed air enters the inside of the separator body 9 through the first joint 10, and the core 12 of the spiral centrifugal separator rotates at a high speed. The solid particles, oil droplets and liquid droplets of the particles are thrown to the wall surface inside the separator body 9 due to the centrifugal force, then fall along the wall surface, and finally are discharged through the first sewage channel 13, and the separated compressed air passes through the first row in turn. The air channel 15 and the second joint 11 enter the first filter 6, so that the solid particles, oil droplets and liquid droplets of larger particles in the wet compressed air can be effectively discharged, effectively prolonging the life of the molecular sieve and improving the filtration efficiency. Efficiency, to ensure the user's compressed air quality, improve system efficiency.

As shown in Figure 3, the first filter 6 also includes a first filter body 17, a third joint 18, a fourth joint 19 and a second sewage channel 20 arranged at the bottom of the first filter body 17, the porous ceramic The filter element 21 is arranged inside the first filter body 17. The porous ceramic filter element 21 includes a first filter element body 49 and a second exhaust passage 22. One end of the third joint 18 communicates with the second joint 11, and the other end communicates with the second joint 18. The exhaust passage 22 communicates, and one end of the fourth joint 19 communicates with the first filter element body 49, and the other end communicates with the second filter 7. In FIG. 3, compressed air enters the second exhaust passage 22 through the third joint 18 , the porous ceramic filter element 21 filters oil and water sol particles with a certain particle size in the compressed air, and then enters the second filter 7 through the first filter element body 49 and the fourth joint 19 in turn, and the filtration efficiency is high. It can effectively extend the life of the molecular sieve, ensure the quality of compressed air for users, and improve the working efficiency of the system.

The first filter 6 adopts the working principle of mechanical filtration, utilizes the pores of the 5um porous ceramic filter element 21 to carry out mechanical filtration, and filters oil and hydrosol particles with a certain particle size in the high-pressure gas, and the filtration efficiency reaches 98%; the porous ceramic filter element 21 can be used regularly cleaning.

As shown in Figure 3, the second filter 7 also includes a second filter body 23, a fifth joint 24, a sixth joint 25, and a third sewage channel 26 arranged at the bottom of the second filter body 23, the activated carbon filter element 27 is set inside the second filter body 23, the activated carbon filter element 27 includes the second filter element body 50 and the third exhaust channel 28, one end of the fifth joint 24 communicates with the fourth joint 19, and the other end communicates with the third exhaust channel The channel 28 is connected, one end of the sixth joint 25 is communicated with the second filter body 50, and the other end is communicated with the drying module 3. In FIG. The remaining traces of oil mist in the air are adsorbed, and the filtration efficiency is high, which can effectively prolong the life of the molecular sieve, ensure the quality of compressed air for users, and improve the working efficiency of the system.

The second filter 7 adopts the working principle of activated carbon filtration, and utilizes the activated carbon filter element 27 to absorb the trace amount of oil mist remaining in the compressed air, and the filtration efficiency reaches 99.999%. Filter a small amount of oil mist in the compressed gas to within the range of 0.1mg/ ^m3 ; the activated carbon filter element 27 can be replaced regularly.

The embodiment of the application of the present invention adopts the high-pressure compression degreasing water method, the spiral centrifugal separation method and the activated carbon oil mist purification method. The oil and water in the air are completely separated before entering the drying tower, avoiding a large amount of oil and water entering the drying tower to pollute the molecular sieve during the low-pressure boosting stage, effectively prolonging the life of the molecular sieve, ensuring the quality of compressed air for users, and improving the working efficiency of the system.

In Fig. 2, the first two-position three-way valve 32 and the second two-position three-way valve 34 are all controlled by PLC; when the first drying tower 31 is working in adsorption, the first two-position three-way valve 32 leads to the first All the way of the drying tower 31 is powered on, and the first two-position three-way valve 32 is closed all the way to the muffler 35, and the wet air enters the first drying tower 31; at the same time, the second drying tower 33 is in regeneration work, and the second and second The one-way three-way valve 34 leading to the second drying tower 33 is de-energized and closed, and the second two-position three-way valve 34 is opening one way leading to the muffler 35. After the molecular sieve in the second drying tower 33 is regenerated, the moist air passes through the silencer. Device 35 discharges; Then enter the next round of circulation, and the next round of circulation is the opposite.

As shown in FIG. 2, the post-processing module 51 includes a first heater 36 connected to the other end of the first drying tower 31 and a second heater 37 connected to the other end of the second drying tower 33. The processing module 51 also includes a first one-way valve 38, a second one-way valve 39, a post-filter 40 and a post-pressure maintaining valve 41, the inlet end of the first one-way valve 38 is connected to the first heater 36 connected, the outlet end of the first one-way valve 38 is connected with the post filter 40, the inlet end of the second one-way valve 39 is connected with the second heater 37, and the air outlet of the second one-way valve 39 The air outlet end is connected with the post filter 40, the inlet end of the post pressure maintaining valve 41 is connected with the post filter 40, the gas outlet end of the post pressure maintaining valve 41 is connected with the exhaust port 4, and the The post-processing module 51 also includes a third one-way valve 42, a fourth one-way valve 43, and a decompression valve 44. The gas outlet end of the third one-way valve 42 is connected to the first heater 36, and the third one-way valve The inlet end of the valve 42 is connected to the pressure reducing valve 44, the gas outlet end of the fourth one-way valve 43 is connected to the second heater 37, and the inlet end of the fourth one-way valve 43 is connected to the pressure reducing valve 44 , the inlet end of the decompression valve 44 is connected with the outlet end of the rear pressure maintaining valve 41; the outlet end of the decompression valve 44 is connected with the inlet end of the third check valve 42 and the fourth check valve 43 is connected to the inlet end, the first one-way valve 38 is used to output the dry air of the first drying tower 31, the second one-way valve 39 is used to output the dry air of the first drying tower 31, and the post-filter is used to output the dry air of the first drying tower 31. The dry air output by a one-way valve 38 or the second one-way valve 39 is further filtered, and then the filtered air is output to the rear pressure maintaining valve 41, and the rear pressure maintaining valve 41 finally passes through the exhaust port 4 to purify After the dry air is discharged, a post-pressure maintaining valve 41 is set between the exhaust port 4 and the post-filter 40. The post-pressure maintaining valve 41 can effectively prevent the back pressure of the system from being too low (such as boosting the pressure of the cylinder). The formed high-speed airflow impacts the molecular sieve bed and breaks the molecular sieve, which can effectively prolong the service life of the molecular sieve and improve the working efficiency of the system; The output dry air is sent to the third one-way valve 42 or the fourth one-way valve 43, and the third one-way valve 42 is used to input the dry air into the first drying tower 31 after being heated by the heater 36. The four one-way valves 43 are used to input the dry air into the second drying tower 33 after being heated by the heater 37; The one-way valve 38 or the second one-way valve 39 output dry air, and output through the post filter 40, the post pressure maintaining valve 41 and the exhaust port 4 in sequence; when the first drying tower 31 and the second drying tower 33 When one of the drying towers is in the adsorption state, the other drying tower is in the regeneration state; at this time, when the corresponding second drying tower 33 or the first drying tower 31 is in the regeneration state, the output from the post pressure maintenance valve 41 Part of the dry air will pass through the pressure reducing valve 44, and then Enter the second drying tower 33 or the first drying tower 31 through the fourth one-way valve 43 or the third one-way valve 42 for molecular sieve regeneration. The structure is simple, the operation is convenient, the service life of the molecular sieve can be effectively extended, and the working efficiency of the system can be improved.

In Fig. 2, take the first drying tower 31 in the adsorption state and the second drying tower 33 in the regeneration state as an example: when the first drying tower 31 is in the adsorption state, the dry air is output through the corresponding first one-way valve 38 for drying. Air and dry air are further filtered through the post filter 40 in turn, then pass through the post pressure maintaining valve 41, and finally output from the exhaust port 4; while the first drying tower 31 is adsorbing, the second drying tower 33 is in regeneration state, a part of the dry air output by the rear pressure-holding valve 41 is decompressed into low-pressure air through the pressure-reducing valve 44, then passes through the fourth check valve 43, is heated by the heater 37, and then enters the second drying tower 33 for molecular sieve regeneration , the dry air that enters the second drying tower 33 becomes moist air after absorbing the moisture of the molecular sieve, and is finally discharged through the muffler 35 .

In Fig. 2, take the first drying tower 31 in the regeneration state and the second drying tower 33 in the adsorption state as an example: when the second drying tower 33 is in the adsorption state, the dry air is output through the corresponding second one-way valve 39 for drying. Air and dry air are further filtered through the post filter 40 in turn, then through the post pressure maintaining valve 41, and finally output from the exhaust port 4; while the second drying tower 33 is adsorbing, the first drying tower 31 is in regeneration state, a part of the dry air output by the rear pressure-holding valve 41 is decompressed into low-pressure air through the pressure-reducing valve 44, and then enters the first drying tower 31 after being heated by the heater 36 through the third check valve 42 for molecular sieve regeneration , the dry air entering the first drying tower 31 becomes moist air after absorbing the moisture of the molecular sieve, and is finally discharged through the muffler 35 .

If the first drying tower 31 is in the adsorption state at the current moment and the second drying tower 33 is in the regeneration state, then at the next moment the first drying tower 31 is in the regeneration state and the first drying tower 31 is in the adsorption state, and so on.

In Fig. 2, a post-pressure maintaining valve 41 is set between the exhaust port 4 and the post-filter 40, which can effectively prevent the high-speed airflow formed when the system back pressure is too low (such as boosting the gas cylinder) from affecting the molecular sieve bed. Layers cause an impact and break the molecular sieve. The opening pressure of the rear pressure-preserving valve 41 is set between 1/3-1/2 of the maximum working pressure.

In FIG. 2 , the main function of the first heater 36 and the second heater 37 is to heat the regeneration gas to overcome the Joule Thomson effect.

As shown in Figure 2, the dew point meter 46 is on the pipeline where the pressure reducing valve 44 is located, and the air intake pipeline of the dew point meter 46 is provided with a throttle valve 45 for adjusting the air flow of the dew point meter 46; the dew point meter 46 is used To detect the dew point temperature of the high-pressure gas output by the decompression 44 .

As shown in Figure 2, the system body also includes a first sewage discharge solenoid valve 16, a first manual sewage discharge valve 29 and a sewage discharge port 8. One end of the first sewage discharge solenoid valve 16 is connected to the oil-water separator 5 and the first filter respectively. The device 6 and the second filter 7 are connected, and the other end is connected with the sewage outlet 8. One end of the first manual sewage valve 29 is respectively connected with the oil-water separator 5, the first filter 6 and the second filter 7, and the other end is It is connected with the sewage outlet 8. With this structure, the sewage outlet 8 can discharge the oil, water and solid particles discharged from the oil-water separator 5, the first filter 6 and the second filter 7 out of the system. The structure is simple and the operation is convenient.

As shown in Figure 2, the system body also includes a second blowdown solenoid valve 48 and a second manual blowdown valve 47, one end of the second blowdown solenoid valve 48 is connected to the rear filter 40, and the other end is connected to the blowdown port 8, one end of the second manual drain valve 47 is connected to the post filter 40, and the other end is connected to the drain port 8. With this structure, the drain port 8 can filter the oil and water filtered out by the post filter 40. And the solid particles are discharged out of the system, the structure is simple and the operation is convenient.

Claims (8)

1. A marine high-pressure air drying and purification system, comprising a system body, characterized in that: the system body includes an air inlet (1) for compressed air to enter, and oil-water outlets arranged in sequence along the air inlet direction of the air inlet (1). Separation module (2), pre-pressure maintaining valve (30), drying module (3), post-processing module (51) and exhaust port (4), the oil-water separation module (2) includes an oil-water separator (5) , the first filter (6) and the second filter (7), the air inlet of the oil-water separator (5) communicates with the air inlet (1) of the compressed air, and the air outlet of the oil-water separator (5) It communicates with the inlet end of the first filter (6), the outlet end of the first filter (6) communicates with the inlet end of the second filter (7), and the outlet end of the second filter (7) communicates with the front The inlet port of the pressure maintaining valve (30) is connected, the outlet port of the front pressure maintaining valve (30) is connected with the inlet port of the drying module (3), and the outlet port of the drying module (3) is connected with the post-processing module (51 ), the gas outlet of the post-processing module (51) is connected to the exhaust port (4); the oil-water separator (5) is used to separate the solid particles and liquid in the compressed air by means of spiral centrifugal separation. An oil-water separator (5) for separating droplets and oil droplets, the first filter (6) is a first filter (6) that uses a porous ceramic filter element (21) to filter, and the second filter (7 ) is a second filter (7) that uses an activated carbon filter element (27) for filtering; the pre-pressure maintaining valve (30) is used to keep the oil-water separation module (2) in a high pressure state during initial operation. 2. A kind of marine high-pressure air drying and purification system according to claim 1, characterized in that: the oil-water separator (5) comprises a separator body (9), a second air intake port connected to the separator body (9) A joint (10), a second joint (11) connected to the gas outlet of the separator body (9), a spiral centrifugal separator core (12) disposed inside the separator body (9) and a spiral centrifugal separator core (12) disposed on the separator body (9) The bottom and the first sewage channel (13) communicated with the inside of the separator body (9); the spiral centrifugal separator core (12) includes a core body (14) connected to the separator body (9) and a set In the first exhaust channel (15) inside the core body (14), the first joint (10) is communicated with the air inlet (1), and one end of the first exhaust channel (15) is connected to the The inside of the separator body (9) communicates, and the other end of the first exhaust channel (15) communicates with the first filter (6) through the second joint (11). 3. A kind of marine high-pressure air drying and purification system according to claim 2, characterized in that: the first filter (6) comprises a first filter body (17), connected to the first filter body (17) The third joint (18) at the air end, the fourth joint (19) connected to the air outlet of the first filter body (17), and the first filter body (17) bottom and communicated with the first filter body (17). Two sewage passages (20); the porous ceramic filter element (21) is arranged inside the first filter body (17), and the porous ceramic filter element (21) includes a first filter element body (49) and is arranged on the first filter element body (49) ) and the second exhaust passage (22) communicated with the third joint (18), the third joint (18) communicates with the second joint (11) through a pipeline, and the second exhaust passage (22) It communicates with the fourth joint (19) through a porous ceramic filter element (21). 4. A kind of marine high-pressure air drying and purification system according to claim 3, characterized in that: the second filter (7) also includes a second filter body (23), connected to the second filter body (23) The fifth joint (24) at the air intake end, the sixth joint (25) connected to the air outlet of the second filter body (23) and the bottom of the second filter body (23) communicated with the inside of the second filter body (23) The third sewage channel (26), the activated carbon filter element (27) is arranged inside the second filter body (23), and the activated carbon filter element (27) includes the second filter element body (50) and is arranged on the second filter element body (50) The third exhaust passage (28) inside and communicated with the fourth joint (19), the fifth joint (24) communicates with the fourth joint (19) through a pipeline, and the third exhaust passage (28) passes through The activated carbon filter element (27) is in communication with the sixth joint (25), and the sixth joint (25) is in communication with the intake end of the pre-pressure maintaining valve (30). 5. A marine high-pressure air drying and purification system according to claim 1, 2, 3 or 4, characterized in that: the drying module (3) includes a first drying tower (31), a first two-position three-way Valve (32), second drying tower (33), second two-position three-way valve (34) and muffler (35), the first two-position three-way valve (32) and the second two-position three-way valve (34) are all controlled by PLC, and the inlet end of described first two-position three-way valve (32) is used for communicating with the outlet end of pre-pressure maintaining valve (30) through PLC control, and described second two-position three-way The inlet end of the through valve (34) is controlled by PLC to communicate with the outlet end of the pre-pressure maintaining valve (30), and the two outlet ends of the first two-position three-way valve (32) are controlled by PLC for Be communicated with muffler (35) and first drying tower (31) respectively; The two outlet ports of described second two-position three-way valve (34) are used for being respectively connected with muffler (35) and second drying tower by PLC control. The tower (33) is connected; when PLC controls the inlet end of the first two-position three-way valve (32) to open, the inlet end of the first two-position three-way valve (32) and the front pressure maintaining valve (30) The gas outlet is connected. At this time, the PLC controls the gas outlet of the first two-position three-way valve (32) connected to the first drying tower (31) to open, and the PLC controls the first two-position three-way valve connected to the silencer (35). The gas outlet of (32) is closed, the inlet end of PLC controls the second two-position three-way valve (34) is closed, and the gas outlet of the second two-position three-way valve (34) connected with the muffler (35) is controlled by PLC to open ; When the inlet end of the PLC controlled the second two-position three-way valve (34) was opened, the second two-position three-way valve (34) was communicated with the outlet end of the pre-pressure maintaining valve (30), and now the PLC control and The outlet end of the second two-position three-way valve (34) connected to the second drying tower (33) is opened, and the inlet end of the first two-position three-way valve (32) is controlled by PLC to close, and the PLC controls the connection with the muffler (35) The gas outlet of the connected first two-position three-way valve (32) is opened, and the gas outlet of the second two-position three-way valve (34) connected with the muffler (35) is closed by PLC control. 6. A kind of marine high-pressure air drying and purification system according to claim 5, characterized in that: the post-processing module (51) also includes a first one-way valve (38), a second one-way valve (39), Post filter (40) and post pressure maintaining valve (41), the inlet port of the first one-way valve (38) communicates with the first drying tower (31), and the first one-way valve (38) ) is communicated with the intake end of the rear filter (40), the intake end of the second check valve (39) is communicated with the second drying tower (33), and the second check valve ( 39) is communicated with the air inlet of the rear filter (40), the air inlet of the rear pressure maintaining valve (41) is communicated with the outlet of the rear filter (40), and the rear The gas outlet of the pressure maintaining valve (41) is communicated with the exhaust port (4), and the aftertreatment module (51) also includes a first heater (36), a second heater (37), a third check valve ( 42), the fourth one-way valve (43) and pressure reducing valve (44), the air inlet end of described pressure reducing valve (44) is communicated with the gas outlet end of post pressure maintaining valve (41), and described pressure reducing valve The gas outlet of (44) communicates with the intake end of the third check valve (42) and the intake end of the fourth check valve (43) respectively, and one end of the first heater (36) communicates with the third check valve (43). The gas outlet of the one-way valve (42) communicates, and the other end communicates with the first drying tower (31), and one end of the second heater (37) communicates with the gas outlet of the fourth one-way valve (43), and the other end communicates with the gas outlet of the fourth one-way valve (43). The second drying tower (33) is communicated; When the first drying tower (31) dries the high-pressure air output by the outlet end of the first two-position three-way valve (32), the air after drying is passed by the first drying tower (31) ) and pass through the post-filter (40) and the post-pressure maintaining valve (41) in turn, part of the high-pressure air output by the post-pressure maintaining valve (41) is discharged through the exhaust port (4), and the other part enters the decompression Valve (44), the high-pressure air output by the pressure reducing valve (44) enters the second heater (37) through the fourth one-way valve (43), and enters the second drying tower after being heated by the second heater (37) (33) for the molecular sieve in the second drying tower (33) to regenerate; when the second drying tower (33) dries the high-pressure air output by the outlet end of the second two-position three-way valve (34), the dried The air is output by the second two-position three-way valve (34) and passes through the post-filter (40) and the post-pressure maintaining valve (41) in sequence, and part of the high-pressure air output by the post-positioning pressure-maintaining valve (41) passes through the exhaust The other part enters the decompression valve (44), and the high-pressure air output by the decompression valve (44) enters the first heater (36) through the third one-way valve (42), and is heated by the first After the device (36) is heated, enter the first drying tower (31) for the molecular sieve in the first drying tower (31) to regenerate. 7. A marine high-pressure air drying and purification system according to claim 1, characterized in that: the system body also includes a first sewage discharge solenoid valve (16), a first manual sewage discharge valve (29) and a sewage discharge port (8 ), one end of the first blowdown electromagnetic valve (16) is connected with the oil-water separator (5), the first filter (6) and the second filter (7) respectively, and the other end is connected with the blowdown outlet (8), One end of the first manual drain valve (29) is respectively connected to the oil-water separator (5), the first filter (6) and the second filter (7), and the other end is connected to the drain outlet (8). 8. A marine high-pressure air drying and purification system according to claim 7, characterized in that: the system body also includes a second blowdown solenoid valve (48) and a second manual blowdown valve (47), the first One end of the second blowdown electromagnetic valve (48) is connected with the post filter (40), the other end is connected with the blowdown port (8), and one end of the second manual blowdown valve (47) is connected with the post filter (40). connected, and the other end is connected to the sewage outlet (8).

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