Wind rotational flow dry-wet CIP cleaning method for tank

Abstract

The invention discloses a wind rotational flow dry-wet CIP (cleaning in place) cleaning method for a tank body, which comprises the following steps: during dry cleaning, compressed air is introduced into the tank body to be cleaned through an inward extending air inlet in the top of the tank body and a tangential air inlet in the side wall of the tank body, and the compressed air dry cleaning is carried out; wherein a bent pipe extends into the through hole in the top of the tank body, an inward-extending air inlet in the top of the tank body is formed by the bent pipe, the bent pipe is bent towards one side of the manhole in the tank body, and the bending angle is 95-105 degrees; two mutually symmetrical tangential air inlets are formed in the side wall of the tank body, each tangential air inlet is communicated with an air inlet pipe which is tangentially arranged with the tank body, each air inlet pipe comprises a divergent section which is connected with the corresponding tangential air inlet and is of a horn structure, and the inner diameter of each divergent section is gradually increased in the air flowing direction; and the tangential air inlet is provided with an airflow baffle plate for enabling the tangentially entered airflow to flow along the wall. According to the method, air rotational flow dry cleaning and traditional CIP wet cleaning are combined, in the dry cleaning process, the air inlet mode of the to-be-cleaned tank is adjusted, dry cleaning in each step can be efficient and thorough, cleaning dead zones do not exist, the time and water consumption of the wet cleaning process can be greatly shortened, and the cleaning efficiency of the to-be-cleaned tank is improved. Therefore, the amount of waste water is greatly reduced.

Description

Technical Field

[0001] The invention relates to a wind cyclone dry-wet CIP cleaning method for a tank body. Background Art

[0002] The technologies used for internal cleaning of medical equipment are divided into two categories: wet cleaning technology uses liquid media such as water, various aqueous solutions, and organic solvents for cleaning, while dry cleaning technology uses gases such as air as a medium for cleaning. They are widely used in the cleaning of various pipes and tanks used in food and pharmaceuticals.

[0003] In the pharmaceutical industry, wet cleaning of cans is very common and has very good cleaning effects, but there are problems such as long cleaning time and high water waste. If these cleaning waste liquids are not handled properly, it will cause great pollution to the environment, so this also increases the cost of cleaning. With the modern society's requirements for high efficiency, high cleanliness rate and green environmental protection in the cleaning industry, the proportion of dry cleaning technology in the cleaning industry is increasing day by day. Dry cleaning methods generally include dry ice cleaning, plasma cleaning, ultrasonic cleaning and air blowing. Compressed air cleaning is particularly widely used in dry cleaning technology because it has the characteristics of no pollution and flexibility.

[0004] However, when the existing tank body is dry-cleaned by air blowing, air flow turbulence occurs, resulting in a large flow cleaning dead zone in the tank body, resulting in incomplete cleaning. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a cyclone dry and wet CIP cleaning method for tank bodies, which combines cyclone dry cleaning with traditional CIP wet cleaning, and in the dry cleaning process, by adjusting the air intake mode of the tank body to be cleaned, each step of dry cleaning can be made efficient and thorough, there is no cleaning dead zone, and the time and water consumption of the wet cleaning process can be greatly reduced, thereby greatly reducing the amount of wastewater.

[0006] Technical solution: The wind cyclone dry-wet CIP cleaning method for tank bodies described in the present invention, in the cleaning method, during dry cleaning, compressed air is introduced into the tank body to be cleaned through the inward-extending air inlet on the top of the tank body and the tangential air inlet on the side wall to perform compressed air dry cleaning; wherein a bend pipe is extended into the through hole on the top of the tank body, the bend pipe forms the inward-extending air inlet on the top of the tank body, the bend pipe is bent toward the manhole side in the tank body, and the bending angle is 95-105°; two mutually symmetrical tangential air inlets are opened on the side wall of the tank body, each tangential air inlet is connected to an air inlet pipe arranged tangentially to the tank body, the air inlet pipe includes a gradually expanding section connected to the tangential air inlet and having a trumpet structure, along the gas flow direction, the inner diameter of the gradually expanding section gradually increases, and an air flow baffle is provided at the tangential air inlet to make the tangentially entering air flow flow against the wall.

[0007] Wherein, the tangential air inlet is arranged at a position 50mm to 60mm away from the weld on the upper end surface of the tank body.

[0008] The air inlet pipe is connected to the tank body at an angle of 15° to the horizontal plane while being tangent to the tank body.

[0009] Among them, when the inner diameter of the tank is within 2m, the diameter of the elbow is 1 inch; when the inner diameter of the tank is more than 2m, the diameter of the elbow is 1.5 inches. When the inner diameter of the tank is within 2m, the diameter of the tangential air inlet is 1 inch; when the inner diameter of the tank is more than 2m, the diameter of the tangential air inlet is 1.5 inches.

[0010] Among them, the air intake pipe includes a contraction section and a gradual expansion section; along the gas flow direction, the diameter of the contraction section on the small diameter side is 25mm, the diameter of the large diameter side is 38mm, and the length of the contraction section is about 400mm; the diameter of the gradual expansion section on the small diameter side is 33mm, the diameter of the large diameter side is 70mm, and the length of the gradual expansion section is about 160mm.

[0011] Wherein, the airflow baffle includes at least three baffles, there is a gap between adjacent baffles, and multiple baffles are arranged longitudinally in the middle and lower parts of the tangential air inlet; each baffle is suspended at the tangential air inlet through an axis, and when the airflow blows, the baffle rotates relative to the axis toward the center of the tank body, and when the water flow impacts the baffle, the baffle rotates relative to the axis in the tangential air inlet; one end of the axis is welded to the inner wall of the tank body.

[0012] Among them, three baffles are distributed in the middle and lower parts of the tangential air inlet, and the length of the airflow baffle is not less than the diameter of the tangential air inlet. By adding the airflow baffle, the macro vortex / turbulence is eliminated, so that the airflow adheres to the wall of the tank better, covers the tank wall more evenly, and the air washing flow rate is higher.

[0013] The baffle droops by gravity in a natural state, and blocks the airflow when it is swept, ensuring that the gas flows along the wall. When dry cleaning is completed and wet cleaning begins, when the spray ball in the tank cleans the inner wall of the tank, the water flow will impact the baffle, and the baffle will swing into the tangential air inlet, and the water flow can clean the middle and lower part of the tangential air inlet; since there is no baffle blocking the upper part of the tangential air inlet (there is no baffle on the upper part), the water flow can also use the back splash of the back of the baffle in the middle area to clean the upper part of the inner wall of the tangential air inlet.

[0014] Wherein, the cleaning method specifically comprises the following steps:

[0015] (1) Pure water spray tank: Use pure water to spray and wash the tank for 2 minutes at a water pressure of 1 to 2 kg. Stop rinsing and discharge the spray liquid out of the tank body. Then, introduce compressed air through the inner air inlet on the top of the tank body and the tangential air inlet on the side wall to perform compressed air dry cleaning. The gas flow rate at the air inlet is 30 m / s and the dry cleaning time is 1 minute.

[0016] (2) Alkali solution spray tank and alkali solution circulation tank: Use alkali solution to circulate and clean the tank for 20 to 30 minutes and recover the alkali solution; then introduce compressed air through the inner extension air inlet on the top of the tank and the tangential air inlet on the side wall to perform compressed air dry cleaning; the gas flow rate at the air inlet is 30m / s, and the dry cleaning time is 1min;

[0017] (3) Pure water spray or injection water spray tank: Use pure water or injection water to spray and wash the tank. The cleaning time is 2 minutes and the water pressure is 1 to 2 kg. Stop flushing and drain the final spray water. Then, introduce compressed air through the inner extension air inlet on the top of the tank and the tangential air inlet on the side wall to perform compressed air dry cleaning. The gas flow rate at the air inlet is 30 m / s and the dry cleaning time is 1 minute. After cleaning, dry it.

[0018] Wherein, in step (3), the drying time is 20 minutes.

[0019] The present invention uses a tangential air inlet pipe with a contraction section and a gradual expansion section to effectively increase the gas pressure, improve the gas utilization rate, and make the airflow distribution on the wall more uniform. By adding an airflow baffle, the macroscopic vortex / turbulence is eliminated while further improving the uniformity of airflow coverage on the tank wall and the flow rate of air washing. The present invention changes the traditional straight pipe air intake to an inward-extending curved pipe structure air intake, and coordinates the bending angle and bending direction of the curved pipe, so that the cleaning trace coverage near the top head of the tank is higher and the distribution is more uniform. At the same time, the gas velocity on the wall of the top head of the tank is greatly improved compared with the traditional top air intake, thereby effectively improving the dry cleaning effect and shortening the wet cleaning time.

[0020] Beneficial effects: Compared with the prior art, the present invention has the following significant effects: the method of the present invention combines the cyclone dry cleaning technology with the traditional CIP cleaning method, which can effectively save the cleaning time of the tank body and improve the cleaning efficiency; and by adjusting the air intake method of the tank body to be cleaned, each step of dry cleaning can be efficient and thorough, without cleaning dead zones, and can also greatly reduce the water consumption of the wet cleaning process, thereby greatly reducing the amount of wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of the tank for adjusting the air intake mode;

[0022] Figure 2 A top view of two tangential air inlets symmetrically arranged on the side wall of the tank;

[0023] Figure 3 for Figure 2 Schematic diagram of the arrangement of the airflow baffle in the middle AA view;

[0024] Figure 4 Figure 1 is the flow distribution corresponding to the top air intake during the dry cleaning process in Example 1;

[0025] Figure 5 FIG. II is the flow distribution corresponding to the top air intake during the dry cleaning process in Example 1;

[0026] Figure 6 It is the velocity cloud diagram and trajectory diagram of the top air intake during the dry cleaning process in Example 1. DETAILED DESCRIPTION

[0027] like Figures 1 to 3 As shown, the present invention is a cyclone dry-wet CIP cleaning method for a tank body. In the cleaning method, during dry cleaning, compressed air is introduced into the tank body 1 to be cleaned through the inwardly extending air inlet 8 on the top of the tank body and the tangential air inlet 7 on the side wall to perform compressed air dry cleaning; wherein, a bend pipe 2 is extended into the through hole 3 on the top of the tank body, the bend pipe 2 forms the inwardly extending air inlet 8 on the top of the tank body, the bend pipe 2 is bent in the tank body 1 toward the manhole 4 side, and the bending angle α is 95-105°; two mutually symmetrical tangential air inlets 7 are opened on the side wall of the tank body, each of the tangential air inlets 7 is connected to the air inlet 5 tangentially arranged with the tank body, the air inlet 5 includes a gradually expanding section 51 connected to the tangential air inlet in a trumpet structure, along the gas flow direction, the inner diameter of the gradually expanding section 51 gradually increases, and an air flow baffle 6 is provided at the tangential air inlet 7 to make the tangentially entering air flow flow against the wall. The tangential air inlet 7 is arranged at a position of 50 mm from the weld of the upper end surface of the tank body 1. The air inlet pipe 5 is connected to the tank body 1 at an angle of 15° with the horizontal plane while being tangential to the tank body 1.

[0028] Among them, the air intake pipe 5 includes a contraction section 52 and a gradually expanding section 51; along the gas flow direction, the inner diameter of the contraction section 52 gradually decreases, the diameter of the small diameter side of the contraction section 52 is 25mm, the diameter of the large diameter side is 38mm, and the length of the contraction section 52 is about 400mm; the diameter of the small diameter side of the gradually expanding section 51 is 33mm, the diameter of the large diameter side is 70mm, and the length of the gradually expanding section 51 is about 160mm.

[0029] Among them, the airflow baffle 6 includes three baffles 61, there is a gap 62 between adjacent baffles 61, the three baffles 61 are arranged in sequence along the longitudinal direction at the tangential air inlet 7, and each baffle 61 is suspended at the tangential air inlet 7 through an axis 63. When the airflow is blown, the baffle 61 rotates relative to the axis 63, and one end of the axis 63 is welded to the inner wall of the tank body 1.

[0030] Three baffles are distributed in the middle and lower parts of the tangential air inlet bell mouth 7. When the spray ball in the tank body 1 cleans the inner wall of the tank, the water flow will impact the baffle 61, and the baffle 61 will rotate into the air inlet bell mouth 7, and the water flow can clean the middle and lower parts of the air inlet bell mouth 7; since there is no baffle 6 blocking the upper part of the air inlet bell mouth 7 (there is no baffle on the upper part), the water flow can also use the back splash of the back of the baffle in the middle area to clean the upper part of the inner wall of the air inlet bell mouth 7. The length of the air flow baffle 6 is not less than the diameter of the tangential air inlet 7.

[0031] The baffle 61 hangs down by gravity in a natural state, and blocks the airflow when it is swept, ensuring that the gas flows along the wall.

[0032] The dry and wet CIP cleaning method of the present invention solves the problems of low efficiency, long cleaning time, and waste of cleaning liquid / water in the existing cleaning technology of simple wet cleaning. The dry cleaning in the method of the present invention makes the airflow on the wall of the tank body flow rate good, the coverage is uniform, and the cleaning efficiency is high. In addition, the trace coverage rate near the head is higher, thereby greatly improving the dry cleaning effect, and then effectively shortening the cleaning time of the wet cleaning process, saving cleaning water. The air intake pipe used in the present invention can increase the pressure of the airflow into the tank, improve the impact of the airflow, and use the tangential bell mouth to inlet at the same time, so that the airflow distribution on the wall is more uniform. In order to make the airflow blown in from the tangential bell mouth inlet more evenly distributed and the gas dry cleaning efficiency higher, an airflow baffle is set at the tangential gradually expanding air inlet. By adopting the tangential bell mouth gradually expanding air intake and the airflow baffle, the dry cleaning efficiency of the tank body and the lower head is very high.

[0033] The method of the present invention is applied to a large tank with a capacity of 15000 L and a large tank (15000 L) calculation domain.

[0034] Tank body: Φ2600mm; height 2800mm; elliptical head.

[0035] The bending angle of the inner extending air inlet on the top of the tank is 105° and is biased towards the manhole. The diameter of the inner extending air inlet is Φ50mm. The diameter of the tangential air inlet is Φ50mm.

[0036] The cleaning method of the present invention specifically comprises the following steps:

[0037] (1) Pure water spray tank: Use pure water to spray and wash the tank, the purpose is to remove the residual liquid of the medicine that is not firmly attached to the inner surface of the equipment and dissolve the dirt in the tank; the cleaning time is 2 minutes, the water pressure is 1 to 2 kg, stop flushing, and discharge the spray liquid out of the tank; then introduce compressed air through the inner extension air inlet on the top of the tank and the tangential air inlet on the side wall to perform compressed air dry cleaning, blow the residual liquid of the medicine out of the tank, and reduce the residual amount of medicine in the tank; the gas flow rate at the air inlet is 30m / s, and the dry cleaning time is 1 minute;

[0038] (2) Alkali solution spray tank and alkali solution circulation tank: Use alkali solution to circulate and clean the tank for 20 minutes and recycle the alkali solution. In order to reduce the consumption of cleaning water, compressed air is introduced through the inner extension air inlet on the top of the tank and the tangential air inlet on the side wall to perform compressed air dry cleaning. The residual alkali solution is blown out of the tank to save the amount of final cleaning spray water in the next step. The gas flow rate at the air inlet is 30m / s, and the dry cleaning time is 1min.

[0039] (3) Pure water spray or injection water spray tank: The purpose of the final spray is to ensure that the cleaning effect meets the requirements of cleaning verification. The tank is sprayed with pure water or injection water for 2 minutes at a water pressure of 1 to 2 kg. After the final spray meets the requirements, the flushing is stopped and the final spray water is drained. To further shorten the cleaning time, compressed air is introduced through the inner air inlet on the top of the tank body and the tangential air inlet on the side wall to perform compressed air dry cleaning. The gas flow rate at the air inlet is 30 m / s and the dry cleaning time is 1 min. Drying is performed after cleaning for 20 min (if the dry cleaning method of the present invention is not used after the final spray, the drying time needs to be 30 min).

[0040] In the dry cleaning process of the present invention, the 15000L large tank is tangentially inlet on both sides, and the elbow is bent 105° inside the tank at a position where the angle between the top of the tank and the central axis is 45°. Figures 4-5 ) shows that the coverage rate of the traces on the top of the tank is high, the trace coverage rate in the narrow area of ​​the manhole is high, and the gas velocity is relatively high, so the dry cleaning effect is good. From the velocity cloud map of the top air intake and the trajectory map of the traces ( Figure 6 ) It can be seen that the gas velocities inside the manhole and the upper head are very high, the wall flow velocity on the upper part of the tank body is also very high, the trace coverage rate near the top head is high and the distribution is also very uniform. Compared with the traditional top air intake straight pipe method, the gas velocity on the top head wall of the top air intake method of the present invention is much improved.

[0041] During the dry cleaning process of the present invention, an inwardly extending air inlet 8 with a bending angle of 105° is used, an air inlet pipe 5 with a specific structure is used to pressurize the side of the tank body, and tangential air intake is adopted, and an air flow baffle 6 is added at the tangential air inlet 7, so that the air flow in the tank body is closer to the wall and the gas utilization rate is higher, thereby greatly improving the efficiency and effect of dry cleaning.

[0042] Comparative Example 1

[0043] A cleaning method comprises the following steps:

[0044] (1) Pure water spray tank: Use pure water to spray and wash the tank for 2.5 minutes at a water pressure of 1 to 2 kg. Stop flushing and discharge the spray liquid out of the tank body. Then, introduce compressed air through the straight pipe air inlet on the top of the tank body and the tangential air inlet on the side wall to perform compressed air dry cleaning. The gas flow rate at the air inlet is 30 m / s and the dry cleaning time is 1.4 minutes.

[0045] (2) Alkali solution spray tank and alkali solution circulation tank: The tank body is cleaned with alkali solution circulation for 27 minutes and the alkali solution is recovered; compressed air is introduced through the straight pipe air inlet on the top of the tank body and the tangential air inlet on the side wall to perform compressed air dry cleaning; the gas flow rate at the air inlet is 30m / s, and the dry cleaning time is 1.4min;

[0046] (3) Pure water spray or injection water spray tank: Use pure water spray to wash the tank, the cleaning time is 2.5 minutes, the water pressure is 1 to 2 kg, and after the final spraying meets the requirements, stop flushing and drain the final spraying water; introduce compressed air through the straight pipe air inlet on the top of the tank body and the tangential air inlet on the side wall to perform compressed air dry cleaning; the gas flow rate at the air inlet is 30m / s, and the dry cleaning time is 1.4min; dry after cleaning, the drying time is 24min.

[0047] Comparative Example 2-In Comparative Example 2, the intake pipe intakes air tangentially, but there is no gradually expanding section with a trumpet structure.

[0048] A cleaning method comprises the following steps:

[0049] (1) Pure water spray tank: Use pure water to spray and wash the tank for 2.7 minutes at a water pressure of 1 to 2 kg. Stop rinsing and discharge the spray liquid out of the tank body. Then, introduce compressed air through the inner air inlet on the top of the tank body and the tangential air inlet on the side wall to perform compressed air dry cleaning. The gas flow rate at the air inlet is 30 m / s and the dry cleaning time is 1.5 minutes.

[0050] (2) Alkali solution spray tank and alkali solution circulation tank: Use alkali solution to circulate and clean the tank for 28 minutes and recover the alkali solution; introduce compressed air through the inner extension air inlet on the top of the tank and the tangential air inlet on the side wall to perform compressed air dry cleaning; the gas flow rate at the air inlet is 30m / s, and the dry cleaning time is 1.5min;

[0051] (3) Pure water spray or injection water spray tank: Use pure water spray to wash the tank, the cleaning time is 2.5 minutes, the water pressure is 1 to 2 kg, and after the final rinse meets the requirements, stop rinsing and drain the final rinse water; introduce compressed air through the inner extension air inlet on the top of the tank body and the tangential air inlet on the side wall to perform compressed air dry cleaning; the gas flow rate at the air inlet is 30m / s, and the dry cleaning time is 1.5min; dry after cleaning, the drying time is 26min.

[0052] Comparative Example 3-In Comparative Example 3, the air intake pipe is tangentially inlet, but there is no gradually expanding section with a trumpet structure, and no air flow baffle is set at the tangential air intake.

[0053] A cleaning method comprises the following steps:

[0054] (1) Pure water spray tank: Use pure water to spray and wash the tank for 2.9 minutes at a water pressure of 1 to 2 kg. Stop flushing and discharge the spray liquid out of the tank body. Then, introduce compressed air through the straight pipe air inlet on the top of the tank body and the tangential air inlet on the side wall to perform compressed air dry cleaning. The gas flow rate at the air inlet is 30 m / s and the dry cleaning time is 1.6 minutes.

[0055] (2) Alkali solution spray tank and alkali solution circulation tank: The tank body is cleaned with alkali solution for 30 minutes and the alkali solution is recovered; in order to reduce the consumption of cleaning water, compressed air is introduced through the straight pipe air inlet on the top of the tank body and the tangential air inlet on the side wall to perform compressed air dry cleaning; the gas flow rate at the air inlet is 30m / s, and the dry cleaning time is 1.7min;

[0056] (3) Pure water spray or injection water spray tank: Use pure water spray to wash the tank, the cleaning time is 2.8 minutes, the water pressure is 1 to 2 kg, and after the final spraying meets the requirements, stop flushing and drain the final spraying water; introduce compressed air through the straight pipe air inlet on the top of the tank body and the tangential air inlet on the side wall to perform compressed air dry cleaning; the gas flow rate at the air inlet is 30m / s, and the dry cleaning time is 1.8min; dry after cleaning, the drying time is 29min.

Claims

1. A wind cyclone wet and dry CIP cleaning method for a tank, characterized in that: In the cleaning method, during dry cleaning, compressed air is introduced into the tank body to be cleaned through the inner extending air inlet (8) at the top of the tank body (1) and the tangential air inlet (7) at the side wall to perform compressed air dry cleaning; wherein a curved pipe (2) is extended into the through hole (3) at the top of the tank body (1), the curved pipe (2) forms the inner extending air inlet (8) at the top of the tank body, and the curved pipe (2) is bent inside the tank body (1) toward the manhole (4), and the bending angle is 95 to 10 5°; two mutually symmetrical tangential air inlets are opened on the side wall of the tank body (1); each tangential air inlet (7) is connected to an air inlet pipe (5) arranged tangentially to the tank body (1); the air inlet pipe (5) includes a gradually expanding section (51) connected to the tangential air inlet (7) and having a trumpet structure; along the gas flow direction, the inner diameter of the gradually expanding section (51) gradually increases; and an air flow baffle (6) is provided at the tangential air inlet (7) to make the tangentially entering air flow flow close to the wall.

2. The method for cleaning tanks with cyclonic dry and wet CIP according to claim 1, characterized in that: The tangential air inlet (7) is arranged on the upper end surface of the tank body (1) at a position 50 mm to 60 mm away from the weld.

3. The air cyclone wet-dry CIP cleaning method for tanks according to claim 1, characterized in that: The air inlet pipe (5) is connected to the tank body (1) at an angle of 15° to the horizontal plane while being tangent to the tank body (1).

4. The method for cleaning tanks by using a cyclonic dry-wet CIP method according to claim 1, characterized in that: When the inner diameter of the tank body (1) is less than 2 m, the diameter of the elbow (2) is 1 to 1.2 inches; when the inner diameter of the tank body (1) is greater than 2 m, the diameter of the elbow (2) is 1.5 to 2 inches.

5. The method for cleaning tanks with cyclonic dry and wet CIP according to claim 1, characterized in that: When the inner diameter of the tank body (1) is less than 2 m, the diameter of the tangential air inlet (7) is 1 to 1.2 inches; when the inner diameter of the tank body (1) is greater than 2 m, the diameter of the tangential air inlet (7) is 1.5 to 2 inches.

6. The method for cleaning tanks with cyclonic dry and wet CIP according to claim 1, characterized in that: The air inlet pipe (5) comprises a contraction section (52) and a gradually expanding section (51); along the gas flow direction, the inner diameter of the contraction section (52) gradually decreases, the diameter of the contraction section (52) on the small diameter side is 25 mm, the diameter of the contraction section (52) on the large diameter side is 38 mm, and the length of the contraction section (52) is 400 mm; the diameter of the gradually expanding section (51) on the small diameter side is 38 mm, the diameter of the gradually expanding section (51) on the large diameter side is 70 mm, and the length of the gradually expanding section (51) is 160 mm.

7. The air cyclone wet-dry CIP cleaning method for tanks according to claim 1, characterized in that: The airflow baffle (6) comprises at least three baffles (61), and there is a gap (62) between adjacent baffles (61). The plurality of baffles (61) are distributed at the middle and lower parts of the tangential air inlet (7), and each baffle (61) is suspended at the tangential air inlet (7) via a shaft (63). When the airflow blows, the baffle (61) rotates toward the center of the tank body relative to the shaft (63); when the water flow impacts the baffle (61), the baffle (61) rotates toward the inside of the tangential air inlet (7) relative to the shaft (63); one end of the shaft (63) is welded to the inner wall of the tank body.

8. The method for cleaning tanks with cyclonic dry and wet CIP according to claim 7, characterized in that: The length of the airflow baffle (6) is not less than the diameter of the tangential air inlet (7).

9. The wind cyclone wet-dry CIP cleaning method for tanks according to claim 1, characterized in that: The steps include: (1) Pure water spray tank: Use pure water to spray and wash the tank for 2 minutes at a water pressure of 1 to 2 kg. Stop rinsing and discharge the spray liquid out of the tank body. Then, introduce compressed air through the inner air inlet on the top of the tank body and the tangential air inlet on the side wall to perform compressed air dry cleaning. The gas flow rate at the air inlet is 30 m / s and the dry cleaning time is 1 minute. (2) Alkali solution spray tank and alkali solution circulation tank: Use alkali solution to circulate and clean the tank for 20 to 30 minutes and recover the alkali solution; then introduce compressed air through the inner extension air inlet on the top of the tank and the tangential air inlet on the side wall to perform compressed air dry cleaning; the gas flow rate at the air inlet is 30m / s, and the dry cleaning time is 1min; (3) Pure water spray or injection water spray tank: Use pure water or injection water to spray and wash the tank. The cleaning time is 2 minutes and the water pressure is 1 to 2 kg. Stop flushing and drain the final spray water. Then, introduce compressed air through the inner extension air inlet on the top of the tank and the tangential air inlet on the side wall to perform compressed air dry cleaning. The gas flow rate at the air inlet is 30 m / s and the dry cleaning time is 1 minute. After cleaning, dry it.

10. The air cyclone wet-dry CIP cleaning method for tanks according to claim 9, characterized in that: In step (3), the drying time is 20 minutes.

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