A purification system for ice-carrying compressed air

Abstract

The present application relates to the technical field of compressed air purification, and discloses a purification system for ice-carrying compressed air, which comprises a sprayer, a salt water tank, a rotary-spray absorber and a desalted water tank; the air outlet of the sprayer is connected with the air inlet of the rotary-spray absorber through a pipeline, and the ice-carrying compressed air enters the air inlet of the sprayer, and then flows out of the air outlet of the sprayer and enters the air inlet of the rotary-spray absorber. The present application solves the technical problem that the ice-carrying compressed air is prone to block the equipment during ice removal and purification, and it is difficult to produce low-temperature product gas after ice removal in the prior art, and has the advantages that the ice and solid impurities carried by the compressed air can be removed at the same time, and the compressed air entering the use equipment is low-temperature, clean and dry, and the present application can be widely used in the compressed air energy storage industry in the fields of petroleum, chemical industry, metallurgy, electric power, machinery, light industry, textile, automobile manufacturing, electronics, food, medicine, biochemistry, national defense and electric power energy storage.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of compressed air purification, in particular to a purification system of compressed air carrying ice. BACKGROUND

[0002] Air has the characteristics of easy acquisition, good compressibility, high safety, etc. The temperature of air compressed by a compressor is generally high, and in order to improve the energy density, the compressed air needs to be stored under low temperature conditions. In addition, the use scenarios of low-temperature compressed air are more extensive, and common ones are in the fields of chemical industry, metallurgy, electronics, food, medical treatment and manufacturing, etc.

[0003] In the process of implementing the present application, the inventors found that at least the following problems exist in the prior art:

[0004] Since the low-temperature compressed air is in a medium-high pressure range, its storage device is a pressure-bearing container. Under the influence of the storage ambient temperature, the water carried by the low-temperature compressed air in the pressure-bearing container exists in the form of ice. If it is directly used, flow channel blockage is easy to occur, and in severe cases, mechanical equipment damage is caused. If it is directly introduced into a gas-liquid separator, not only the original gas-liquid separation efficiency of the separator is affected, but also the ice blockage of the filter screen of the separator. At present, there are two methods to eliminate this influence: one is to directly heat the compressed air carrying ice to liquefy or sublimate the solid ice, which will cause the saturated water vapor pressure of the product gas to be higher, and is not suitable for users who need low-temperature compressed air, and the demand for heat source is large; the other is to use a mechanical separation method to directly separate the solid ice and impurities carried by the raw material gas, but the ice layer generated in the separator is difficult to remove, and the separator cannot be stably operated for a long time.

[0005] Based on this, how to provide a purification system of compressed air carrying ice, which can remove the ice and solid impurities carried by the compressed air, and obtain low-temperature clean and dry compressed air, is a technical problem that technicians in the field are eager to solve. SUMMARY

[0006] The purpose of the present application is to provide a purification system of compressed air carrying ice, which removes the ice carried by the compressed air to ensure that the compressed air entering the compressed air use equipment is a low-temperature dry gas.

[0007] To achieve the above purpose, in one aspect, a purification system for compressed air containing ice is provided, comprising a sprayer, a salt water tank, a rotary spray absorber and a desalted water tank; the salt water tank is used for storing salt water, and the desalted water tank is used for storing desalted water; the liquid outlet of the salt water tank is in communication with the first liquid inlet of the sprayer through a pipeline, the gas outlet of the sprayer is in communication with the gas inlet of the rotary spray absorber, and the liquid outlet of the desalted water tank is in communication with the liquid inlet of the rotary spray absorber through a pipeline; the compressed air containing ice enters the sprayer from the gas inlet of the sprayer, and then flows out from the gas outlet of the sprayer and enters the gas inlet of the rotary spray absorber.

[0008] Further, a first heater is arranged on the pipeline between the liquid outlet of the salt water tank and the first liquid inlet of the sprayer, for heating the salt water entering the sprayer.

[0009] Further, a first temperature monitor is arranged on the pipeline of the gas outlet of the sprayer, and the temperature of the first heater is controlled according to the temperature of the first temperature monitor.

[0010] Further, a first booster pump is arranged on the pipeline of the liquid outlet of the salt water tank.

[0011] Further, the sprayer further comprises a sprayer blowdown outlet and a second liquid inlet; the second liquid inlet is located between the first liquid inlet and the gas inlet of the sprayer; the sprayer blowdown outlet and the second liquid inlet are connected through a circulation loop, and the circulation loop is used to guide the liquid in the sprayer back into the sprayer.

[0012] Further, a second heater is arranged on the circulation loop, and the second heater is used to heat the liquid entering the second liquid inlet; the sprayer blowdown outlet has a second temperature monitor, and the temperature of the second heater is controlled according to the temperature of the second temperature monitor.

[0013] Further, a circulation pump is arranged on the circulation loop, the inlet of the circulation pump is in communication with the sprayer blowdown outlet, the outlet of the circulation pump is in communication with the cold inlet of the second heater, and the second temperature monitor is located between the inlet of the circulation pump and the sprayer blowdown outlet.

[0014] Further, a second booster pump is arranged on the pipeline between the liquid outlet of the desalted water tank and the liquid inlet of the rotary spray absorber.

[0015] Further, the spray purging port is provided with a purging branch, the purging branch is provided with a first purging valve, a purging pump and a second purging valve, the inlet of the first purging valve is communicated with the spray purging port, the outlet of the first purging valve is communicated with the inlet of the purging pump, the outlet of the purging pump is communicated with the inlet of the second purging valve, and the outlet of the second purging valve is communicated with a purging main pipe.

[0016] Further, a separator is arranged between the outlet of the spray and the inlet of the rotary spray absorber, and the separator is used for drying the compressed air flowing out of the outlet of the spray.

[0017] One of the above technical solutions has the following advantages or beneficial effects:

[0018] The saturated water and free water in the compressed air at normal temperature will become free water and ice when the temperature of the compressed air is below the freezing point. The purification system of the compressed air with ice includes a spray, a brine tank, a rotary spray absorber and a desalted water tank. The compressed air with ice to be purified enters the inlet of the spray, and then flows out of the outlet of the spray and enters the inlet of the rotary spray absorber.

[0019] The spray is used for removing the ice in the compressed air. The outlet of the brine tank is communicated with the first liquid inlet of the spray through a pipeline, and the brine tank is used for storing brine, which is the spraying working medium of the spray. The freezing point of the brine can be ensured to be much lower than that of water by adjusting the temperature and concentration of the brine. The compressed air with ice enters the inlet of the spray and fully contacts with the brine in the spray, so that the ice is melted by the brine and flows to the liquid collecting area at the bottom of the spray. The ice is melted by the brine while the compressed air flowing out of the outlet of the spray is low-temperature compressed air by adjusting the temperature and concentration of the brine.

[0020] The compressed air sprayed by the brine still carries a large amount of salt solution. The outlet of the spray is communicated with the inlet of the rotary spray absorber through a pipeline, and the rotary spray absorber is used for removing the salt solution in the compressed air and drying the compressed air. The desalted water tank is used for storing desalted water, which is obtained by removing suspended solids, colloids, inorganic cations, anions and other impurities in water by various water treatment processes. The outlet of the desalted water tank is communicated with the liquid inlet of the rotary spray absorber through a pipeline, and the desalted water is used for providing the rotary spray absorber with an absorption working medium.

[0021] The compressed air flowing out of the gas outlet of the sprayer enters the rotary-spray absorber tangentially from the side, the inside of the rotary-spray absorber can form a cyclone field, the compressed air carrying ice enters from the gas inlet and is subjected to centrifugal force, at the same time, the desalted water is sprayed from the side along the radial direction, is impacted and cut by the compressed air carrying ice to form countless desalted water droplets for absorption, and the desalted water droplets and the salt solution in the compressed air carrying ice carry out absorption reaction. Because the inside of the rotary-spray absorber can form a cyclone field, the purified compressed air flows out from the top of the rotary-spray absorber, at this time, the purified compressed air is dry low-temperature compressed air and can be used as a low-temperature dry product gas.

[0022] Therefore, the compressed air carrying ice is fully contacted with the salt water in the sprayer and the ice is melted, the heat required for directly melting the ice is reduced, the waste of cold energy of the low-temperature compressed air is reduced, the ice in the compressed air is separated under a low-temperature condition and is not easy to be blocked, the salt solution and other impurities in the compressed air are removed through the rotary-spray absorber, the compressed air is dried, and dry low-temperature compressed air products are obtained. The purification system of the compressed air carrying ice can be widely used in the compressed air energy storage industry in the fields of petroleum, chemical industry, metallurgy, electric power, machinery, light industry, textile, automobile manufacturing, electronics, food, medicine, biochemistry, national defense and electric power energy storage. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a flow chart of the purification system of the compressed air carrying ice.

[0024] In the figure: 10-sprayer; 11-first temperature monitor; 12-second temperature monitor; 13-circulation valve; 14-circulation pump; 15-second liquid inlet valve; 16-first blowdown valve; 17-first liquid inlet; 18-second liquid inlet; 19-gas inlet of the sprayer; 20-salt water tank; 21-salt water tank on-off valve; 22-first booster pump; 30-rotary-spray absorber; 40-desalted water tank; 41-second booster pump; 50-first heater; 51-second heater; 60-separator; 70-blowdown pump; 71-second blowdown valve; 72-blowdown main pipe. DETAILED DESCRIPTION

[0025] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0028] Embodiment one:

[0029] As Figure 1 shown, the present embodiment provides a purification system of ice-carrying compressed air, which comprises a sprayer 10, a salt water tank 20, a rotary spray absorber 30 and a desalted water tank 40; the salt water tank 20 is used to store salt water, and the desalted water tank 40 is used to store desalted water; the liquid outlet of the salt water tank is communicated with the first liquid inlet of the sprayer 10 through a pipeline, the gas outlet of the sprayer 10 is communicated with the gas inlet of the rotary spray absorber 30 through a pipeline, the liquid outlet of the desalted water tank 40 is communicated with the liquid inlet of the rotary spray absorber 30 through a pipeline, and the ice-carrying compressed air enters the sprayer from the gas inlet 19 of the sprayer, and then flows out from the gas outlet of the sprayer 10 and enters the gas inlet of the rotary spray absorber 30.

[0030] The saturated water and free water in the compressed air at normal temperature will become free water and ice when the temperature of the compressed air is below the freezing point. The purification system of the ice-carrying compressed air in this embodiment comprises a sprayer 10, a brine tank 20, a rotary spray absorber 30 and a desalted water tank 40. In this embodiment, the ice-carrying compressed air to be purified is referred to as raw gas, which enters the inlet of the sprayer 10 and then flows out of the outlet of the sprayer 10 and enters the inlet of the rotary spray absorber 30. The sprayer 10 is used to remove ice in the compressed air. The outlet of the brine tank is connected to the first inlet of the sprayer 10 by a pipeline, and the brine tank 20 is used to store brine, which is the spraying medium of the sprayer 10. By adjusting the temperature and concentration of the brine, the freezing point of the brine can be ensured to be much lower than that of water. The ice-carrying compressed air enters the inlet of the sprayer 10 and fully contacts with the brine in the sprayer 10, so that the ice is melted by the brine and flows to the liquid collection area at the bottom of the sprayer 10. By adjusting the temperature and concentration of the brine, the ice can be melted by the brine while the compressed air flowing out of the outlet of the sprayer 10 is low-temperature compressed air.

[0031] The compressed air after brine spraying still carries a large amount of salt solution. The outlet of the sprayer 10 is connected to the inlet of the rotary spray absorber 30 by a pipeline, and the rotary spray absorber 30 is used to remove the salt solution in the compressed air and dry the compressed air. The desalted water tank 40 is used to store desalted water, which is obtained by removing suspended solids, colloids and inorganic cations, anions and other impurities in water by various water treatment processes. The outlet of the desalted water tank 40 is connected to the inlet of the rotary spray absorber 30 by a pipeline, and the desalted water is used to provide the absorbing medium for the rotary spray absorber 30. The compressed air flowing out of the outlet of the sprayer 10 enters the rotary spray absorber 30 tangentially from the side, and a rotating flow field can be formed in the interior of the rotary spray absorber 30. After the ice-carrying compressed air enters the inlet, it is subjected to centrifugal force at the same time, and the desalted water is sprayed radially from the side, which is impacted, cut and atomized by the ice-carrying compressed air to form countless desalted water droplets for absorption. The desalted water droplets and the salt solution in the ice-carrying compressed air react with each other. Because a rotating flow field can be formed in the interior of the rotary spray absorber 30, the purified compressed air flows out of the top of the rotary spray absorber, which is dry low-temperature compressed air and can be used as low-temperature dry product gas.

[0032] Therefore, the ice-carrying compressed air purification system of the embodiment can make the ice-carrying compressed air fully contact with the brine in the sprayer 10 and melt the ice, reduce the heat required for directly melting the ice, and reduce the waste of cold energy of the low-temperature compressed air. The ice in the compressed air is separated under low-temperature conditions, and ice blocking is less likely to occur. Then, the salt solution and other impurities in the compressed air are removed by the rotary spray absorber 30, and clean low-temperature compressed air is obtained. The ice-carrying compressed air purification system of the embodiment can be widely used in the compressed air energy storage industry in the fields of petroleum, chemical industry, metallurgy, power, machinery, light industry, textile, automobile manufacturing, electronics, food, medicine, biochemistry, national defense, and power storage.

[0033] Further, a first heater 50 is arranged on the pipeline between the liquid outlet of the brine tank and the first liquid inlet 17 of the sprayer 10, for heating the brine entering the sprayer 10. When the temperature of the brine after contacting with the raw material gas is lower than the freezing point of the brine, icing is intensified. To avoid this situation, the first heater 50 is arranged on the pipeline between the liquid outlet of the brine tank and the first liquid inlet 17 of the sprayer 10, for heating the brine flowing from the brine tank 20 into the sprayer 10, so that the temperature of the brine after heat exchange with the raw material gas is still above the freezing point of the brine, and the ice in the raw material gas is ensured to be melted by the brine.

[0034] Further, a first temperature monitor 11 is arranged on the pipeline of the gas outlet of the sprayer 10, and the temperature of the first heater 50 is controlled according to the temperature of the first temperature monitor 11. The first temperature monitor 11 is used to monitor the temperature of the gas flowing out of the sprayer 10. The freezing point of the brine can be calculated according to the composition of the brine in the brine tank 20, and the freezing point of the brine can be used as the first preset temperature of the first temperature monitor 11. If the detected temperature of the first temperature monitor 11 is lower than the first preset temperature, it indicates that the outlet gas temperature of the sprayer 10 is lower than the freezing point temperature of the brine in the sprayer 10, and the first heater 50 is turned on to heat the brine to be entered into the sprayer. If the detected temperature of the first temperature monitor 11 is higher than the first preset temperature, the first heater 50 is turned off. Preferably, when the detected temperature of the first temperature monitor 11 is higher than the freezing point of the brine in the brine tank 20 by more than 5 degrees Celsius, the first heater 50 is turned off.

[0035] Further, a first booster pump 22 is arranged on the pipeline of the liquid outlet of the brine tank. The liquid amount of the brine in the sprayer 10 can be adjusted by adjusting the outlet pressure of the first booster pump 22, and then the effect of absorbing the ice carried by the raw material gas in the sprayer 10 is adjusted.

[0036] Further, a second booster pump 41 is arranged on the pipeline between the outlet of the desalted water tank 40 and the inlet of the rotating spray absorber 30. The liquid amount in the rotating spray absorber 30 can be adjusted by adjusting the outlet pressure of the second booster pump 41, and thus the effect of absorbing the raw material gas carrying the salt-containing droplets in the rotating spray absorber 30 is adjusted.

[0037] Further, a salt water tank switch valve 21 is arranged between the outlet of the salt water tank 20 and the inlet of the first booster pump 22.

[0038] Further, the spray device 10 further comprises a spray device blowdown and a second liquid inlet 18, which is arranged between the spray device 10 and the first liquid inlet 17, and the spray device blowdown and the second liquid inlet 18 are connected by a circulation loop. As described above, the compressed air carrying ice enters the spray device 10 from the air inlet, and fully contacts the salt water in the spray device 10, the ice is melted by the salt water, and flows to the liquid collection area at the bottom of the spray device 10, and the spray device blowdown is arranged near the bottom of the liquid collection area, and the circulation loop is arranged between the spray device blowdown and the second liquid inlet 18. Since the concentration of the salt solution in the liquid collection area can be used for deicing under normal circumstances, the salt solution in the liquid collection area after the first spraying is introduced back into the spray device 10 for the second spraying through the circulation loop, the utilization efficiency of the salt solution is improved, and the discharge is reduced and the cost is reduced. Through the circulation loop, the above-mentioned salt water can be sprayed multiple times. Preferably, the second liquid inlet 18 and the first liquid inlet 17 are arranged opposite to each other on the spray device 10, so as to improve the mechanical properties of the spray device.

[0039] Further, a second heater 51 is arranged on the circulation loop, for heating the liquid entering the second liquid inlet; and the spray device blowdown is provided with a second temperature monitor 12, and the temperature of the second heater 51 is controlled according to the temperature of the second temperature monitor 12. Since the raw material gas is low-temperature compressed air carrying ice, when it passes through the spray device 10 for the first time, it exchanges heat with the salt water entering the spray device 10, and thus the temperature of the salt water after the first spraying is lower than the temperature of the salt water flowing out of the salt water tank 20. At this time, the temperature of the salt solution entering the spray device 10 from the second liquid inlet 18 can be increased by turning on the second heater 51, so as to be close to the temperature of the salt water flowing out of the salt water tank 20. In the present embodiment, the temperature of the salt water flowing out of the salt water tank 20 is calculated according to the temperature of the product gas and the composition of the salt. The spray device blowdown is provided with the second temperature monitor 12, which can reflect the temperature of the salt solution flowing out of the spray device blowdown. In the present embodiment, the second preset temperature can be determined based on the temperature of the salt water flowing out of the salt water tank 20, and when the temperature of the second temperature monitor 12 is lower than the second preset temperature, the second heater 51 is turned on, and when the temperature is higher than the second preset temperature, the second heater 51 is turned off.

[0040] Further, the circulation loop has a circulation valve 13, a circulation pump 14 and a second liquid inlet valve 15. The circulation valve 13 and the second liquid inlet valve 15 are used to open or close the circulation loop, and the circulation pump 14 is used to adjust the pressure of the brine in the circulation loop at the second liquid inlet, so that the pressure is higher than that of the raw material gas in the sprayer 10, preventing the raw material gas from entering the circulation loop. In addition, the inlet of the second liquid inlet valve 15 is connected to the cold outlet of the second heater. When the temperature of the second heater is insufficient, the second liquid inlet valve 15 can be reduced or closed to ensure the safety and controllability of the system.

[0041] Further, the sprayer has a blowdown branch at the blowdown outlet of the sprayer. The blowdown branch has a first blowdown valve 16, a blowdown pump 70 and a second blowdown valve 71. When the brine in the collection area of the sprayer 10 cannot meet the ice absorption standard, the sprayer needs to be blown down. At this time, the first blowdown valve 16, the blowdown pump 70 and the second blowdown valve 72 are opened, and the brine in the collection area of the sprayer 10 is discharged to the blowdown main pipe 72. When blowdown is not required, the first blowdown valve 16, the blowdown pump 70 and the second blowdown valve 71 are closed. The brine in the circulation loop of the sprayer is prevented from flowing into the blowdown branch.

[0042] Further, a separator 60 is arranged between the gas outlet of the sprayer 10 and the gas inlet of the rotary-spray absorber 30. The separator 60 is used to dry the compressed air flowing out of the gas outlet of the sprayer. The compressed air flowing out of the gas outlet of the sprayer 10 enters the gas inlet of the separator 60, and then flows out of the gas outlet of the separator 60 and enters the gas inlet of the rotary-spray absorber 30. The compressed air after spraying will introduce excess brine, and the above-mentioned brine will be further separated by the separator, reducing the amount of total dissolved solids carried by the compressed air.

[0043] Further, the separator 60 is a cyclone separator or a vane separator, which is selected according to the working condition. If the operating condition of the compressed air is stable, such as stable flow and pressure, a cyclone separator is used. If the operating condition of the compressed air has a large elastic range, a vane separator is used.

[0044] Further, the first heater 50 uses a heat exchanger, the cold road inlet of the first heater 50 is communicated with the liquid outlet of the salt water tank, and the cold road outlet of the first heater 50 is communicated with the first liquid inlet of the sprayer. The hot road of the first heater 50 uses a heat source. Similarly, the second heater 51 uses a heat exchanger, the cold road inlet of the second heater 51 is communicated with the blowdown of the sprayer, and the cold road outlet of the second heater 51 is communicated with the second liquid inlet 18 of the sprayer 10. The hot road of the second heater 51 uses a heat source. Further, the first heater 50 and the second heater 51 use the same heat source. The heat source can use waste heat of a thermal power plant, waste heat of a regional boiler room, industrial waste heat source, urban waste heat source, geothermal water heating, nuclear energy heating, heat pump heat source, solar heat source, etc.

[0045] Further, the purification system of ice-carrying compressed air further comprises a blowdown main pipe, the blowdown branch of the sprayer, the blowdown outlet of the separator, and the blowdown outlet of the rotary-spray absorber are all connected to the blowdown main pipe 72. Further, the interface between the blowdown pipe of the separator and the blowdown main pipe 72 is located after the outlet of the second blowdown valve 71, preventing the blowdown liquid of the separator from flowing into the blowdown pipe of the sprayer.

[0046] Obviously, the above embodiments of the present application are merely exemplary and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the claims of the present application.

Claims

1. A purification system for ice-carrying compressed air, characterized in that The system comprises a sprayer, a salt water tank, a rotary spray absorber and a desalted water tank; the salt water tank is used for storing salt water, the desalted water tank is used for storing desalted water, the salt water is the spraying working medium of the sprayer, the freezing point of the salt water can be ensured to be much lower than that of water by adjusting the temperature and concentration of the salt water; the ice can be melted by the salt water, and the compressed air flowing out of the outlet of the sprayer is low-temperature compressed air by adjusting the temperature and concentration of the salt water; The liquid outlet of the salt water tank is communicated with the first liquid inlet of the sprayer through a pipeline, the gas outlet of the sprayer is communicated with the gas inlet of the rotary spray absorber, and the liquid outlet of the desalted water tank is communicated with the liquid inlet of the rotary spray absorber through a pipeline; The compressed air carrying ice enters the sprayer from the gas inlet of the sprayer, and then enters the gas inlet of the rotary spray absorber after flowing out of the gas outlet of the sprayer; the rotary spray absorber is used for removing the salt solution in the compressed air and drying the compressed air.

2. The purification system of ice-laden compressed air according to claim 1, characterized in that, A first heater is arranged on the pipeline between the liquid outlet of the salt water tank and the first liquid inlet of the sprayer, and is used for heating the salt water entering the sprayer.

3. The purification system of ice-laden compressed air according to claim 2, characterized in that, A first temperature monitor is arranged on the pipeline of the gas outlet of the sprayer, and the temperature of the first heater is controlled according to the temperature of the first temperature monitor.

4. The purification system of ice-laden compressed air according to claim 2, characterized in that, A first booster pump is arranged on the pipeline of the liquid outlet of the salt water tank.

5. The purification system for ice-laden compressed air of claim 1, wherein, The sprayer further comprises a sprayer blowdown outlet and a second liquid inlet; the second liquid inlet is located between the first liquid inlet and the gas inlet of the sprayer; the sprayer blowdown outlet and the second liquid inlet are connected through a circulation loop, and the circulation loop is used for leading the liquid in the sprayer back into the sprayer.

6. The purification system of ice-laden compressed air according to claim 5, characterized in that, A second heater is arranged on the circulation loop, and is used for heating the liquid entering the second liquid inlet; the sprayer blowdown outlet is provided with a second temperature monitor, and the temperature of the second heater is controlled according to the temperature of the second temperature monitor.

7. The purification system of ice-laden compressed air according to claim 6, characterized in that, A circulation pump is arranged on the circulation loop; the inlet of the circulation pump is communicated with the sprayer blowdown outlet, the outlet of the circulation pump is communicated with the cold inlet of the second heater; and the second temperature monitor is located between the inlet of the circulation pump and the sprayer blowdown outlet.

8. The purification system of ice-laden compressed air according to claim 1, characterized in that, A second booster pump is arranged on the pipeline between the liquid outlet of the desalted water tank and the liquid inlet of the rotary spray absorber.

9. The purification system of ice-laden compressed air according to claim 1, characterized in that, The sprayer blowdown outlet is further provided with a blowdown branch; the blowdown branch is provided with a first blowdown valve, a blowdown pump and a second blowdown valve; the inlet of the first blowdown valve is communicated with the sprayer blowdown outlet, the outlet of the first blowdown valve is communicated with the inlet of the blowdown pump, the outlet of the blowdown pump is communicated with the inlet of the second blowdown valve, and the outlet of the second blowdown valve is communicated with a blowdown main pipe.

10. The purification system of ice-laden compressed air according to claim 1, characterized in that, A separator is further arranged between the gas outlet of the sprayer and the gas inlet of the rotary spray absorber; the separator is used for drying the compressed air flowing out of the gas outlet of the sprayer.

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