Novel fresh air system for windy and sandy cold radioactive area

Abstract

The invention discloses a novel fresh air system for a windy and dusty cold radioactive area, which comprises a sand removing filter, an input air duct, a fresh air handling unit and an output air duct, the sand removing filter is connected with the fresh air handling unit through the input air duct, the fresh air handling unit is connected with the output air duct, and the fresh air handling unit comprises a pre-filter connected with the input air duct; the spraying humidifier is connected with the pre-filter, and the spraying humidifier is used for spraying, dedusting and humidifying; the sub-high-efficiency filter is connected with the spraying humidifier, and the sub-high-efficiency filter is used for carrying out secondary filtering; an inlet of the fan unit is connected with the sub-high-efficiency filter, an outlet of the fan unit is connected with the output air duct, and the fan unit is used for conveying air to the output air duct; the prefilter, the spraying humidifier, the sub-high-efficiency filter and the fan set are all arranged in the shell. The system greatly reduces the initial investment and the construction period, improves the design efficiency, and can be conveniently and quickly adjusted when coping with a variable air volume system.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a novel fresh air system for windy, sandy, cold and radioactive areas. Background Art

[0002] The environmental conditions of the nuclear facility construction sites in the western region are complex, such as windy and sandy, dry, and extremely cold. The requirements for air supply and air quality in the facilities are also expanding. Especially in the harsh climate of cold and dry winter and windy and sandy spring and autumn, the preparation process of high-quality air is more complicated. In windy and cold areas, conventional air handling units have the problem of frequent replacement of conventional filters, coil freezing, and poor condensate drainage. At present, the air supply of some nuclear facility plants is based on large air volume processing technology. Independent civil engineering air intake centers are conventionally set up, which occupy a large area, have a long distance for centralized processing and transmission, a long construction period, and excessive consumption of materials such as outdoor air ducts, making it difficult to regulate. The fresh air of multiple process sub-items is centrally processed in the air intake center, and it is impossible to adjust the local air supply parameters according to the needs of each process sub-item. In the face of large-scale nuclear facilities, fresh air treatment requires a large amount of cold and hot loads to cool or heat the outdoor air, which consumes too much energy. The fresh air treatment uses a foam dust removal process system with large resistance and high water volume that is difficult to control. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a new type of fresh air system for windy, sandy, cold and radioactive areas in view of the above-mentioned deficiencies in the prior art. The system can be directly applied to engineering design in related fields in view of the climatic conditions of radioactive nuclear facility buildings in the west. The modular fresh air system and its layout can improve design efficiency and reduce construction costs.

[0004] The technical solution adopted to solve the technical problem of the present invention is to provide a new type of fresh air system for windy and sandy cold radioactive areas, including: a sand removal filter, an input air duct, a fresh air unit, and an output air duct. The sand removal filter is connected to the fresh air unit through the input air duct. The sand removal filter is used to filter the wind and sand. The fresh air unit is connected to the output air duct, wherein the fresh air unit includes:

[0005] A pre-filter is connected to the input air duct, and the pre-filter is used for pre-filtering;

[0006] A spray humidifier is connected to the pre-filter and is used for spraying dust removal and humidification;

[0007] Sub-high efficiency filter, connected to the spray humidifier, the sub-high efficiency filter is used for secondary filtration;

[0008] A fan unit, wherein the inlet of the fan unit is connected to the sub-high efficiency filter, the outlet of the fan unit is connected to the output air duct, and the fan unit is used to transport air to the output air duct;

[0009] The housing, the pre-filter, the spray humidifier, the sub-high efficiency filter and the fan unit are all arranged in the housing.

[0010] Preferably, the novel fresh air system for windy, sandy, cold and radioactive areas further comprises:

[0011] An air heater is arranged between the pre-filter and the spray humidifier, the air heater is connected to the pre-filter and the spray humidifier respectively, and the air heater is used to heat the air;

[0012] The flash evaporation pipeline is connected to the spray humidifier. The flash evaporation pipeline is used to pass flash steam into the spray humidifier to heat the spray water in the spray humidifier.

[0013] Preferably, the air heater is a coil-type air heater.

[0014] Preferably, the novel fresh air system for windy, sandy, cold and radioactive areas further comprises:

[0015] The steam network pipeline is connected to the air heater. The steam network pipeline is used to provide steam as a heat source to the air heater. The steam network pipeline inlet is connected to the steam network.

[0016] Preferably, the novel fresh air system for windy, sandy, cold and radioactive areas further comprises:

[0017] The flash tank is connected to the outlet of the pipeline where the heat exchange medium of the air heater is located, and the flash tank is used for reducing the pressure.

[0018] Preferably, the novel fresh air system for windy, sandy, cold and radioactive areas further comprises:

[0019] A condensate tank is connected to the flash tank and is used to collect condensate;

[0020] The condensate pump is connected to the condensate tank and is used to output the condensate in the condensate tank.

[0021] Preferably, the spray humidifier includes: a spray chamber, a spray assembly, and a circulating water tank. The spray chamber is connected to the pre-filter, the spray assembly includes a spray head and a spray pipe, the spray head is arranged in the spray chamber, the spray head is used for spraying dust removal and humidification, the spray pipe inlet is connected to the circulating water tank, the spray pipe outlet is connected to the spray head, and the circulating water tank is used for water replenishment.

[0022] Preferably, the novel fresh air system for windy, sandy, cold and radioactive areas further comprises:

[0023] A circulation pump, wherein an inlet of the circulation pump is connected to the spray chamber, an outlet of the circulation pump is connected to the spray chamber, and the circulation pump is arranged outside the shell.

[0024] Preferably, the novel fresh air system for windy, sandy, cold and radioactive areas further comprises:

[0025] The water supply pipe is connected to the spray humidifier. The water supply pipe is used to spray water to the spray humidifier. The inlet of the water supply pipe is connected to the water supply source.

[0026] Preferably, the input air duct includes: an input air duct body, and an inspection door arranged on the input air duct body, and the fresh air system also includes: an aerosol monitor, and the aerosol detector is arranged in the input air duct body.

[0027] Preferably, the novel fresh air system for windy, sandy, cold and radioactive areas further comprises:

[0028] The fire damper is arranged on the air duct between the fan unit and the output air duct, and the fire damper is connected to the fan unit and the output air duct respectively.

[0029] Preferably, the shell is a cylindrical structure.

[0030] Preferably, the filtration weight efficiency of the sand removal filter is ≥ 80%.

[0031] Preferably, the sand removal filter is arranged outside the building.

[0032] Preferably, the filtration efficiency of the pre-filter is ≥ 85% based on the 0.5 μm counting method.

[0033] Preferably, the filtration efficiency of the sub-high efficiency filter is ≥ 95% based on the 0.5 μm counting method.

[0034] The effects of the new fresh air system in the present invention for windy, sandy, cold and radioactive areas are:

[0035] (1) Improve the problems of unreasonable room layout, unstable operation of condensate recovery system, and unsatisfactory dust removal effect in the air treatment facilities of existing nuclear facilities;

[0036] (2) Compared with the current independent building-type air intake center in the factory area, the modular air intake treatment equipment installed in the factory building reduces the use area of ​​the system to a certain extent. This system greatly reduces the initial investment and construction period, and can be adjusted conveniently and quickly when dealing with variable air volume systems;

[0037] (3) Large-scale factories require too much air flow, up to several million cubic meters per hour, which results in excessive energy consumption. The modular fresh air treatment system can effectively reduce energy consumption.

[0038] (4) Standardized systems and layouts can significantly improve design efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1is a schematic structural diagram of a modular fresh air system in Embodiment 2 of the present invention;

[0040] Figure 2 is a plan cross-sectional view of the layout of the modular fresh air system in Example 2 of the present invention;

[0041] Figure 3 is a plan cross-sectional view of the layout of the modular fresh air system in Example 2 of the present invention;

[0042] Figure 4 is a plan cross-sectional view of the layout of the modular fresh air system in Example 2 of the present invention;

[0043] Figure 5 It is a three-dimensional diagram of the layout of the modular fresh air system in Example 2 of the present invention.

[0044] In the figure: 1-sand removal filter; 2-input air duct; 3-fresh air unit; 4-output air duct; 5-pre-filter; 6-sub-high efficiency filter; 7-housing; 8-air heater; 9-flash pipe; 10-steam pipe network; 11-flash tank; 12-condensate outlet; 13-condensate tank; 14-condensate pump; 15-spray room; 16-circulating water tank; 17-spray head; 18-spray pipe; 19-circulating pump; 20-water supply pipe; 21-input Air inlet duct body; 22-inspection door; 23-first electric valve; 24-fan; 25-second electric valve; 26-drain valve group; 27-temperature and pressure reducing valve group; 28-butterfly valve; 29-building; 30-stairwell; 31-walkway; 32-heat introduction room; 33-water introduction room; 34-equipment room; 35-air inlet room; 36-fan hall; 37-fire damper; 38-condensate pipe; 39-drain outlet; 40-control cabinet; 41-steam inlet. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0046] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0047] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0048] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0049] Example 1

[0050] This embodiment provides a novel fresh air system for windy and sandy cold radioactive areas, including: a sand removal filter, an input air duct, a fresh air unit, and an output air duct. The sand removal filter is connected to the fresh air unit through the input air duct. The sand removal filter is used to filter the wind and sand. The fresh air unit is connected to the output air duct, wherein the fresh air unit includes:

[0051] A pre-filter is connected to the input air duct, and the pre-filter is used for pre-filtering;

[0052] A spray humidifier is connected to the pre-filter and is used for spraying dust removal and humidification;

[0053] Sub-high efficiency filter, connected to the spray humidifier, the sub-high efficiency filter is used for secondary filtration;

[0054] A fan unit, wherein the inlet of the fan unit is connected to the sub-high efficiency filter, the outlet of the fan unit is connected to the output air duct, and the fan unit is used to transport air to the output air duct;

[0055] The housing, the pre-filter, the spray humidifier, the sub-high efficiency filter and the fan unit are all arranged in the housing.

[0056] The effects of the new fresh air system in the windy, sandy, cold and radioactive areas in this embodiment are:

[0057] (1) Improve the problems of unreasonable room layout, unstable operation of condensate recovery system, and unsatisfactory dust removal effect in the air treatment facilities of existing nuclear facilities;

[0058] (2) Compared with the current independent building-type air intake center in the factory area, the modular air intake treatment equipment installed in the factory building reduces the use area of ​​the system to a certain extent. This system greatly reduces the initial investment and construction period, and can be adjusted conveniently and quickly when dealing with variable air volume systems;

[0059] (3) Large-scale factories require too much air flow, up to several million cubic meters per hour, which results in excessive energy consumption. The modular fresh air treatment system can effectively reduce energy consumption.

[0060] (4) Standardized systems and layouts can significantly improve design efficiency.

[0061] Example 2

[0062] like Figures 1 to 5 As shown, this embodiment provides a novel fresh air system for windy and sandy cold radioactive areas, including: a sand removal filter 1, an input air duct 2, a fresh air unit 3, and an output air duct 4. The sand removal filter 1 is connected to the fresh air unit 3 through the input air duct 2. The sand removal filter 1 is used to filter the wind and sand. The fresh air unit 3 is connected to the output air duct 4, wherein the fresh air unit 3 includes:

[0063] A pre-filter 5 is connected to the input air duct 2, and the pre-filter 5 is used for pre-filtering;

[0064] A spray humidifier, connected to the pre-filter 5, is used for spraying dust removal and humidification, and also for evaporative cooling in summer;

[0065] A sub-high efficiency filter 6 is connected to the spray humidifier, and the sub-high efficiency filter 6 is used for secondary filtration;

[0066] A fan unit, wherein the fan unit inlet is connected to the sub-high efficiency filter 6, and the fan unit outlet is connected to the output air duct 4, and the fan unit is used to transport air to the output air duct 4;

[0067] The housing 7 , the pre-filter 5 , the spray humidifier, the sub-high efficiency filter 6 , and the fan unit are all arranged in the housing 7 .

[0068] In summer, when the spray humidifier performs dust removal and humidification, the evaporative cooling of the spray water is used to cool the air.

[0069] Preferably, the novel fresh air system for windy, sandy, cold and radioactive areas further comprises:

[0070] The air heater 8 is arranged between the pre-filter 5 and the spray humidifier. The air heater 8 is connected to the pre-filter 5 and the spray humidifier respectively. The air heater 8 is used to heat the air.

[0071] The flash evaporation pipeline 9 is connected to the spray humidifier, and is used to pass flash steam into the spray humidifier to heat the spray water in the spray humidifier.

[0072] In winter, the air is heated by the air heater 8, and the flash steam is introduced into the spray humidifier through the flash pipe 9 to heat the spray water in the spray humidifier.

[0073] Preferably, the air heater 8 is a coil-type air heater 8 .

[0074] Preferably, the novel fresh air system for windy, sandy, cold and radioactive areas further comprises:

[0075] The steam network pipe 10 is connected to the air heater 8 and is used to provide steam as a heat source to the air heater 8. The inlet of the steam network pipe 10 is connected to the steam network. The inlet of the steam network pipe 10 is a steam inlet 41.

[0076] Preferably, the novel fresh air system for windy, sandy, cold and radioactive areas further comprises:

[0077] The flash tank 11 is connected to the outlet of the pipeline where the heat exchange medium of the air heater 8 is located, and the flash tank 11 is used for reducing the pressure.

[0078] Preferably, the novel fresh air system for windy, sandy, cold and radioactive areas further comprises:

[0079] The condensate tank 13 is connected to the flash tank 11 and is used to collect condensate. The condensate tank 13 is connected to the condensate outlet 12 of the flash tank 11 .

[0080] The condensate pump 14 is connected to the condensate tank 13, and is used to output the condensate in the condensate tank 13. Specifically, in this embodiment, the condensate pump 14 is used to output the condensate in the condensate tank 13 to the condensate network pipeline. Specifically, the condensate pump 14 is arranged on the condensate pipeline 38, and the condensate pipeline 38 is connected to the condensate tank 13.

[0081] Preferably, the spray humidifier includes: a spray chamber 15, a spray component, and a circulating water tank 16. The spray chamber 15 is connected to the pre-filter 5. The spray component includes a spray head 17 and a spray pipe 18. The spray head 17 is arranged in the spray chamber 15. The spray head 17 is used for spraying dust removal and humidification. The inlet of the spray pipe 18 is connected to the circulating water tank 16, and the outlet of the spray pipe 18 is connected to the spray head 17. The circulating water tank 16 is used for water replenishment.

[0082] Preferably, the novel fresh air system for windy, sandy, cold and radioactive areas further comprises:

[0083] A circulation pump 19 , an inlet of the circulation pump 19 is connected to the spray chamber 15 , an outlet of the circulation pump 19 is connected to the spray chamber 15 , and the circulation pump 19 is arranged outside the housing 7 .

[0084] Preferably, the novel fresh air system for windy, sandy, cold and radioactive areas further comprises:

[0085] The water replenishment pipe 20 is connected to the spray humidifier. The water replenishment pipe 20 is used to spray water to the spray humidifier. The inlet of the water replenishment pipe 20 is connected to a water replenishment source.

[0086] Preferably, the input air duct 2 includes: an input air duct body, and an inspection door 22 arranged on the input air duct body, and the fresh air system also includes: an aerosol monitor, and the aerosol detector is arranged in the input air duct body.

[0087] Preferably, the novel fresh air system for windy, sandy, cold and radioactive areas further comprises:

[0088] The fire damper 37 is arranged on the air duct connected between the fan unit and the output air duct 4, and the fire damper 37 is connected to the fan unit and the output air duct 4 respectively.

[0089] Preferably, the housing 7 is a cylindrical structure.

[0090] Preferably, the filtration weight efficiency of the sand removal filter 1 is ≥80%.

[0091] Preferably, the sand removal filter 1 is arranged outside the building 29. The building 29 is provided with a staircase 30, a walkway 31, a heat introduction room 32, a water supply introduction room 33, an equipment room 34, and a blower 24 room. The input air duct 2 is arranged in the blower 24 room.

[0092] Preferably, the filtration efficiency of the pre-filter 5 is ≥ 85% in the 0.5 μm counting method.

[0093] Preferably, the filtration efficiency of the sub-high efficiency filter 6 is ≥ 95% by 0.5 μm counting method.

[0094] Specifically, the fresh air system in this embodiment further includes a first electric valve 23, which is arranged on the connecting air duct between the pre-filter 5 and the input pipe.

[0095] Specifically, the fan unit in this embodiment includes two fans 24 connected in parallel, the fans 24 are centrifugal fans 24 , and the fan unit also includes a second electric valve 25 , which is arranged on the connecting air duct between the fans 24 and the output air duct 4 .

[0096] Specifically, the fresh air system in this embodiment further includes a drain valve group 26, which is arranged on the connecting pipe between the flash tank 11 and the pipe outlet where the heat exchange medium of the air heater 8 is located, and a drain port 39 is also arranged on the pipe.

[0097] Specifically, the fresh air system in this embodiment further includes a temperature reduction and pressure reduction valve group 27 , which is arranged on the connecting pipe between the steam network pipeline 10 and the air heater 8 .

[0098] Specifically, the flash pipe 9 in this embodiment is provided with a butterfly valve 28. The condensate pipe network pipe passes through the water supply introduction room 33 from the condensate pipe network and then enters the heat introduction room 32.

[0099] Specifically, the input air duct 2 is arranged in the air inlet room 35 , and the fresh air unit 3 is arranged in the fan hall 36 .

[0100] Specifically, the implementation steps of the fresh air system arrangement in this embodiment are as follows:

[0101] (1) Outdoor fresh air is firstly filtered through the sand removal filter 1 for coarse filtration to filter out large particles of wind and sand, with a weight efficiency of ≥80% and a wind resistance of 250 Pa. The air after coarse filtration enters the modular fresh air unit 3 (rated air volume 150000m 3 / h) and then enters the pre-filter 5 for pre-filtration. A first electric valve 23 is arranged in front of the pre-filter 5. The filtration efficiency of the pre-filter 5 is ≥85% (weight method); the pre-filtered air enters the coil-type air heater 8 (used in winter). The medium in the coil of the air heater 8 is saturated water vapor of 0.3MPa~0.6MPa (absolute pressure), which heats the cold air to 35℃. The maximum air supply is 4.5t / h. The heated air enters the spray humidifier for spray dust removal and humidification (also used for evaporative cooling in summer). In dusty weather, the dust-containing air is sprayed with water for washing, and the dust removal efficiency is ≥90%, and the evaporative cooling efficiency in summer is ≥90%; the air after dust removal enters the sub-high efficiency filter for filtration, and the filter efficiency is ≥95% (0.5μm counting method); the filtered air is sent to the end through the centrifugal fan 24 and the conveying air duct. The centrifugal fan 24 adopts a 2×50% setting, and a second electric valve 25 is set after the fan 24; the outlet air temperature in winter is 30±5℃, and the outlet air temperature in summer is 22±2℃.

[0102] (2) The heat source of the air heater 8 is introduced from the saturated water vapor network. The steam condensate generated after heat exchange with the fresh air in winter enters the flash tank 11 for decompression after passing through the steam trap group 26. The flash steam generated by the flash tank 11 is discharged to the spray humidifier to heat the spray water. The decompressed condensate enters the condensate tank 13 to be cooled to below 90°C, and is then discharged to the outdoor condensate network by the condensate pump 14.

[0103] (3) The circulating water tank 16 of the spray humidifier is arranged at the bottom of the fresh air unit 3. A turbidity meter is arranged in the circulating water tank 16. When the turbidity is high, it is discharged from the sewage outlet. The sewage outlet is arranged outside the fresh air unit 3. The circulating water tank 16 is provided with a liquid level meter. When the liquid level is low, it is automatically replenished by normal temperature tap water from the water supply pipe 20. The nozzle spray pressure is ≥2bar. A large-diameter nozzle is preferably used to prevent the nozzle from being blocked. The nozzle spray hole diameter should be greater than 4mm.

[0104] The following is combined with Figure 2 , 3 With attached Figure 4 The present invention is specifically described, and the specific implementation steps are as follows:

[0105] (1) The sand removal filter 1 is mounted on the outer wall of the hall of the fan 24 and is connected to the air inlet of the fresh air unit 3 through the input air duct 2. A 600mm×1000mm inspection door 22 is set at the bottom of the input air duct 2, and an aerosol monitor is installed inside to monitor the aerosol concentration in real time; the outlet of the fresh air unit 3 is vertically connected to the output air duct 4 through the air duct, and a 70° fire damper 37 is set near the output air duct 4; the net distance between the two parallel fans 24 of the parallel fresh air unit 3 is ≥3000mm.

[0106] (2) The steam network pipe 10 passes through the water supply introduction room 33 from the steam network and then enters the heat introduction room 32. It is first reduced to 0.3MPa~0.6MPa by the temperature reduction and pressure reducing valve group 27 and then enters the air heater 8 at the top of the fresh air unit 3. After heat exchange with the cold air, condensate is generated. The condensate is first reduced in pressure by the flash tank 11 and then enters the condensate tank 13 in the underground equipment room 34. After being cooled to below 90°C, it is discharged to the condensate network by the condensate pump 14.

[0107] The following is combined with Figure 5 This embodiment is described in detail, and the specific implementation steps are as follows:

[0108] The fresh air unit 3 adopts a circular structure, which has high uniformity, good sealing performance and high anti-cold bridge performance; the flash tank 11 is kept flush with the outlet of the air heater 8 to prevent condensation caused by insufficient condensation back pressure; the circulating water pump of the spray humidifier is placed at the bottom of the outer side of the fresh air unit 3 to facilitate equipment inspection and maintenance; an integrated control cabinet 40 is set at the end of the fresh air unit 3, which can monitor, display and control parameters such as the outlet air temperature, the resistance of each functional section, and the spray water flow in real time.

[0109] The effects of the new fresh air system in the windy, sandy, cold and radioactive areas in this embodiment are:

[0110] (1) Improve the problems of unreasonable room layout, unstable operation of condensate recovery system, and unsatisfactory dust removal effect in the air treatment facilities of existing nuclear facilities;

[0111] (2) Compared with the current independent building-type air intake center in the factory area, the modular air intake treatment equipment installed in the factory building reduces the use area of ​​the system to a certain extent. This system greatly reduces the initial investment and construction period, and can be adjusted conveniently and quickly when dealing with variable air volume systems;

[0112] (3) Large-scale factories require too much air flow, up to several million cubic meters per hour, which results in excessive energy consumption. The modular fresh air treatment system can effectively reduce energy consumption.

[0113] (4) Standardized systems and layouts can significantly improve design efficiency.

[0114] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A new type of fresh air system for windy, sandy, cold and radioactive areas, characterized by: include: A sand removal filter, an input air duct, a fresh air unit, and an output air duct. The sand removal filter is connected to the fresh air unit through the input air duct. The sand removal filter is used to filter the wind and sand. The fresh air unit is connected to the output air duct. The fresh air unit includes: A pre-filter is connected to the input air duct, and the pre-filter is used for pre-filtering; A spray humidifier is connected to the pre-filter and is used for spraying dust removal and humidification; Sub-high efficiency filter, connected to the spray humidifier, the sub-high efficiency filter is used for secondary filtration; A fan unit, wherein the inlet of the fan unit is connected to the sub-high efficiency filter, the outlet of the fan unit is connected to the output air duct, and the fan unit is used to transport air to the output air duct; The housing, the pre-filter, the spray humidifier, the sub-high efficiency filter and the fan unit are all arranged in the housing.

2. The novel fresh air system for windy, sandy, cold and radioactive areas according to claim 1 is characterized in that: Also includes: An air heater is arranged between the pre-filter and the spray humidifier, the air heater is connected to the pre-filter and the spray humidifier respectively, and the air heater is used to heat the air; The flash evaporation pipeline is connected to the spray humidifier. The flash evaporation pipeline is used to pass flash steam into the spray humidifier to heat the spray water in the spray humidifier.

3. The novel fresh air system for windy, sandy, cold and radioactive areas according to claim 2 is characterized in that: The air heater is a coil type air heater.

4. The novel fresh air system for windy, sandy, cold and radioactive areas according to claim 1 is characterized in that: Also includes: The steam network pipeline is connected to the air heater. The steam network pipeline is used to provide steam as a heat source to the air heater. The steam network pipeline inlet is connected to the steam network.

5. The novel fresh air system for windy, sandy, cold and radioactive areas according to claim 4 is characterized in that: Also includes: The flash tank is connected to the outlet of the pipeline where the heat exchange medium of the air heater is located, and the flash tank is used for reducing the pressure.

6. The novel fresh air system for windy, sandy, cold and radioactive areas according to claim 5 is characterized in that: Also includes: A condensate tank is connected to the flash tank and is used to collect condensate; The condensate pump is connected to the condensate tank and is used to output the condensate in the condensate tank to the condensate pipe network.

7. The novel fresh air system for windy, sandy, cold and radioactive areas according to claim 1 is characterized in that: The spray humidifier includes: a spray chamber, a spray component, and a circulating water tank. The spray chamber is connected to the pre-filter. The spray component includes a spray head and a spray pipe. The spray head is arranged in the spray chamber. The spray head is used for spraying dust removal and humidification. The inlet of the spray pipe is connected to the circulating water tank, and the outlet of the spray pipe is connected to the spray head. The circulating water tank is used for water replenishment.

8. The novel fresh air system for windy, sandy, cold and radioactive areas according to claim 7 is characterized in that: Also includes: A circulation pump, wherein an inlet of the circulation pump is connected to the spray chamber, an outlet of the circulation pump is connected to the spray chamber, and the circulation pump is arranged outside the shell.

9. The novel fresh air system for windy, sandy, cold and radioactive areas according to claim 1 is characterized in that: Also includes: The water supply pipe is connected to the spray humidifier. The water supply pipe is used to spray water to the spray humidifier. The inlet of the water supply pipe is connected to the water supply source.

10. The novel fresh air system for windy, sandy, cold and radioactive areas according to claim 1 is characterized in that: The input air duct includes: an input air duct body and an inspection door arranged on the input air duct body. The fresh air system also includes: an aerosol monitor, and the aerosol detector is arranged in the input air duct body.

11. The novel fresh air system for windy, sandy, cold and radioactive areas according to claim 1 is characterized in that: Also includes: The fire damper is arranged on the air duct between the fan unit and the output air duct, and the fire damper is connected to the fan unit and the output air duct respectively.

12. The novel fresh air system for windy, sandy, cold and radioactive areas according to claim 1 is characterized in that: The shell is a cylindrical structure.

13. The novel fresh air system for windy, sandy, cold and radioactive areas according to any one of claims 1 to 12, characterized in that: The filtration weight efficiency of the sand removal filter is ≥80%.

14. The novel fresh air system for windy, sandy, cold and radioactive areas according to any one of claims 1 to 12, characterized in that: The sand removal filter is installed outside the building.

15. The novel fresh air system for windy, sandy, cold and radioactive areas according to any one of claims 1 to 12, characterized in that: The filtration efficiency of the pre-filter is ≥85% using the 0.5 μm counting method.

16. The novel fresh air system for windy, sandy, cold and radioactive areas according to any one of claims 1 to 12, characterized in that: The filtration efficiency of the sub-high efficiency filter is ≥95%, based on the 0.5μm counting method.

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