A kind of boiling low-temperature ozone dry powder sterilization equipment and sterilization method thereof

Abstract

This article proposes a boiling low-temperature ozone dry powder sterilization equipment and a sterilization method thereof. The dry powder sterilization equipment includes an oxygen concentrator, an ozone generator, a mixing tank and a back-blowing device. The oxygen concentrator, the ozone generator, the mixing tank and the back-blowing device are connected in sequence through pipelines. The mixing tank includes a flip seat, a sterilization tank, a flip plate, an air distribution pipe and an air outlet pipe. The distribution pipe is interconnected with the air inlet pipe, and the air outlet pipe is interconnected with the exhaust pipe. The material fluidization boiling technology is adopted to solve the technical problem of sufficient contact between ozone and materials, maintain the ozone concentration in the tank, and reduce natural attenuation. For some lighter materials, the exhaust port is easily blocked, resulting in the inability of fresh ozone to enter, and there is a safety risk. The program-controlled back-blowing control technology is adopted to solve the problem that the exhaust port is easily blocked by lighter materials.

Description

Technical Field

[0001] The present invention belongs to the technical field of dry powder sterilization, and specifically relates to a boiling low-temperature ozone dry powder sterilization equipment and a sterilization method thereof. Background Art

[0002] In the pharmaceutical production process, some materials (such as astragalus, pine cones, pine cone slices, etc.) need to be used directly as medicine. If these materials are sterilized at a temperature ≥50°C, it may cause loss or destruction of the efficacy of the medicine, so these materials can only be sterilized at room temperature.

[0003] Normal temperature sterilization technology refers to a general term for a type of sterilization method used to treat materials that are intolerant to wet (dry) heat. The mainstream normal temperature disinfection and sterilization technologies in use in the world include peracetic acid, ethylene oxide sterilization, hydrogen peroxide plasma sterilization, formaldehyde gas sterilization, radiation sterilization and ozone sterilization. The existing technologies include peracetic acid, ethylene oxide sterilization, hydrogen peroxide plasma sterilization, etc., but the dosage cannot be controlled, and the chemical solvents will have oxidation reactions on some materials, and dry sterilization cannot be achieved; formaldehyde gas sterilization, radiation sterilization, etc., according to current literature, although they will not react to the materials, they will cause great harm to the environment and the human body.

[0004] Ozone sterilization has the advantages of thorough sterilization, no residue, broad spectrum sterilization, and can kill bacterial propagules and spores, viruses, fungi, etc., and can destroy botulinum toxin. In addition, after decay, it will quickly decompose into oxygen or single oxygen atoms, and single oxygen atoms can combine into oxygen molecules by themselves, without any toxic residues, so ozone is a pollution-free disinfectant. However, during ozone sterilization, ozone must be fully in contact with the material 360° without dead ends, and maintain a certain concentration and time to achieve a good sterilization effect; and due to the natural decay of ozone and the "tumbling" of materials, it is necessary to maintain a certain airflow in the sterilizer to allow ozone to continuously enter and keep the materials "tumbling". Therefore, it is necessary to maintain the sealing of the entire sterilization process and the contradiction of material "tumbling".

[0005] There are currently three technical bottlenecks that cannot be resolved. First, in order to ensure 360-degree full contact between ozone and materials, the method of full contact is difficult to maintain; second, ozone must be maintained at a certain concentration and time to achieve a sterilization effect. Due to the natural attenuation of ozone (20 minutes, complete attenuation), fresh ozone needs to be added continuously; third, some lighter materials are prone to clogging the exhaust port, preventing fresh ozone from entering and posing a safety risk. Summary of the invention

[0006] In order to solve the above problems, this paper proposes a boiling low-temperature ozone dry powder sterilization equipment and a sterilization method thereof, the dry powder sterilization equipment includes an oxygen concentrator, an ozone generator, a mixing tank body and a back-blowing device, the oxygen concentrator, the ozone generator, the mixing tank body and the back-blowing device are sequentially connected through pipelines, the outer side of the oxygen concentrator is provided with an air inlet pipe, the outer side of the back-blowing device is provided with an exhaust pipe, the mixing tank body includes a flip seat, a sterilization tank, a flip plate, an air distribution pipe and an air outlet pipe, the inner side of the flip seat is provided with a sterilization tank in a circular rotation, the two ends of the flip seat are connected to the inside of the sterilization tube through the air inlet pipe and the exhaust pipe respectively, and the sterilization A feed inlet and a discharge port are arranged on the outside of the bacteria tank, a plurality of flip plates are arranged in a layered manner around the middle of the inner side of the sterilization tank, a distribution pipe is arranged in the middle of the inner side of the sterilization tank, and an air outlet pipe is arranged horizontally at the inner bottom of the sterilization tank. The distribution pipe is connected with the air inlet pipe, and the air outlet pipe is connected with the exhaust pipe. The material fluidization boiling technology is adopted to solve the technical problem of sufficient contact between ozone and materials, maintain the ozone concentration in the tank body, and reduce natural attenuation. For some lighter materials, the exhaust port is easily blocked, resulting in the inability of fresh ozone to enter, and there is a safety risk. The program-controlled backblowing control technology is adopted to solve the problem that the exhaust port is easily blocked by lighter materials.

[0007] The ozone generator, the mixing tank body and the blowing device are sealed and connected through a stainless steel pipe and a silicone hose. The oxygen generator is a pure oxygen generator with a purity of 98%. The air inlet of the oxygen generator is connected to the external compressed air through an air inlet pipe, and the air outlet of the oxygen generator is connected to the air inlet of the ozone generator through a pipeline. The air source of the ozone generator is 98% pure oxygen produced by the oxygen generator. The air outlet of the ozone generator is connected to the mixing tank body through a pipeline. The outer side of the pipeline between the ozone generator and the mixing tank body is connected to an ozone concentration detector.

[0008] The air distribution pipe is connected to the ozone generator through the air inlet pipe. The air distribution pipe is horizontally arranged at the inner center of the sterilization tank. The surface of the air distribution pipe is annularly and equidistantly provided with a number of air distribution holes. The air distribution pipe distributes the ozone airflow into an umbrella surface through the air distribution holes. The air distribution pipe is fixedly arranged inside the sterilization tank and evenly disperses the ozone inside the tank through the air distribution pipe, so that the ozone can fully contact with the dry powder, thereby increasing the ozone sterilization effect.

[0009] The air blowing pipe is in the shape of an annular pipe, and a plurality of air guide holes are arranged in the form of an annular surface of the air blowing pipe. The interior of the air blowing pipe is communicated with the back-blowing device through a pipeline, and the back-blowing device is a two-way conductive air outlet back-blowing device. The normal port of the back-blowing device is communicated with the exhaust pipe, and the two-way port of the back-blowing device is communicated with the air blowing pipe through a pipeline. A pressure detector is arranged on the outside of the pipeline between the back-blowing device and the air blowing pipe. By designing that the air blowing pipe and the exhaust pipe are interconnected, the opening above the air blowing pipe can not only be used as the air outlet of the exhaust pipe, but can also be used by the back-blowing device to back-blow air at the same time, thereby blowing out the dry powder accumulated on the surface of the opening, thereby ensuring smooth exhaust.

[0010] The sterilization tank is a hollow circular tank with a tapered end that is wide at one end and narrow at the other end. A turning plate is welded and fixedly provided in the middle of the inner side of the sterilization tank. The upper and lower ends of the sterilization tank are respectively provided with a feed inlet and a discharge port. The left and right ends of the sterilization tank are respectively connected to the turning seat in an axially rotatable manner. The two ends of the turning seat are respectively penetrated by an air inlet pipe and an exhaust pipe. The sterilization tank can rotate 360 ​​degrees so as to ensure full contact between the dry powder and ozone in the tank, thereby achieving efficient sterilization effect and efficiency.

[0011] The air inlet pipe is fixedly arranged horizontally inside the turning seat, and the air inlet pipe and the connected air distribution pipe are stably connected to the inside of the sterilization tank through a bearing through-type. The exhaust pipe is arranged inside the turning seat in a linkage and rotational manner, and the exhaust pipe and the connected air blowing pipe are fixedly inserted into the surface of the sterilization tank and rotate in a linkage manner. The air inlet pipe is fixedly arranged in the tank, thereby ensuring that the ozone blown into the tank can contact the dry powder at various angles when the tank body rotates, thereby achieving efficient dry powder sterilization. The synchronously rotating air blowing pipe can not only prevent the accumulation of dry powder through rotation, but also perform backblowing in a circular shape, thereby preventing the blowing at a single angle from affecting the uniformity of the dry powder inside the sterilization tank, thereby ensuring a uniform effect inside the tank.

[0012] The shape of the flipping plate is an arc-shaped plate with vertical folded edges on both sides. The short side of one side of the flipping plate is fixedly connected to the inner wall surface of the sterilization tank, and the other long side of the flipping plate is arranged inside the sterilization tank.

[0013] a. Install a cover with a vacuum feeding pipe and an air-defense port above the feed port of the sterilization tank, connect the vacuum hose, turn on the vacuum feeder, and let the dry powder material enter the sterilization tank under the action of negative pressure;

[0014] b. After feeding to the process volume, remove the cover plate, close the feed port with a blind plate, and seal it with a silicone gasket in the middle;

[0015] c. Turn on the power of the turning seat, control the frequency of operation to make the speed 6-8 rpm, and make the sterilization tank rotate 360° radially; the dry powder material is in a "tumbling" state in the tank under the action of the tank body operation and the turning plate in the tank;

[0016] d. Turn on the oxygen concentrator and ozone generator, use compressed air as the gas source, generate pure oxygen through the oxygen concentrator, and then generate ozone gas through the ozone generator. The valve of the ozone gas pipe is opened in linkage, and the ozone gas enters the sterilization tank;

[0017] e. Ozone gas enters the material distribution pipe through the air inlet pipe, and then is evenly distributed through the air outlet holes on the material distribution pipe in an umbrella-like manner. Under the action of the pressurized ozone gas outlet, the material is also dispersed, so that the ozone gas and the "tumbling" material are fully in contact;

[0018] f. Maintain for 240 minutes to fully sterilize; after sterilization, the dry powder material is discharged through the discharge port;

[0019] g. During the entire sterilization process, the dry powder material is relatively light and easy to block the exhaust port. A backflush device is installed at the exhaust port. The backflush device is connected to the exhaust pipe inside the sterilization tank through a pipeline. The backflush device performs 1 second backflush every 5-10 minutes to keep the exhaust port unobstructed.

[0020] Beneficial effects:

[0021] The material fluidization boiling technology is used to solve the technical problem of sufficient contact between ozone and materials, maintain the ozone concentration in the tank and reduce natural attenuation. For some lighter materials, it is easy to block the exhaust port, resulting in fresh ozone being unable to enter and posing a safety risk. The program-controlled backflush control technology is used to solve the problem of lighter materials being easily blocked by the exhaust port.

[0022] It is fixed inside the sterilization tank and the ozone is evenly dispersed inside the tank through the air distribution pipe, so that the ozone can fully contact with the dry powder, thereby increasing the effect of ozone sterilization.

[0023] By connecting the blowing pipe and the exhaust pipe to each other, the opening above the blowing pipe can not only be used as the exhaust hole of the exhaust pipe, but can also be used by the back-blowing device to back-blow the air, so as to blow out the dry powder accumulated on the surface of the opening, thereby ensuring smooth exhaust.

[0024] The air inlet pipe is fixedly arranged in the tank, thereby ensuring that the ozone blown into the tank can contact the dry powder at various angles when the tank body rotates, thereby achieving efficient dry powder sterilization. The synchronously rotating air blowing pipe can not only prevent the accumulation of dry powder by rotating, but also perform backblowing in a circular shape, thereby preventing the blowing at a single angle from affecting the uniformity of the dry powder inside the sterilization tank, thereby ensuring a uniform effect inside the tank.

[0025] The 360-degree rotating sterilization tank ensures full contact between the dry powder and ozone in the tank, thus achieving efficient sterilization effect and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a dry powder sterilization equipment using boiling low-temperature ozone;

[0027] Figure 2 It is a schematic diagram of the turning plate of a dry powder sterilization equipment using boiling low-temperature ozone;

[0028] Figure 3 It is a schematic diagram of the blowing pipe of a dry powder sterilization equipment using boiling low-temperature ozone;

[0029] In the figure; 1. air inlet pipe, 2. oxygen generator, 3. ozone generator, 4. flip seat, 5. sterilization tank, 6. pressure detector, 7. backflush device, 8. exhaust pipe, 9. flip plate, 10. air distribution pipe, 11. air outlet pipe, 12. ozone concentration detector. DETAILED DESCRIPTION

[0030] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0031] Inlet pipe 1, oxygen generator 2, ozone generator 3, turning seat 4, sterilization tank 5, pressure detector 6, backflush device 7, exhaust pipe 8, turning plate 9, air distribution pipe 10, outlet pipe 11, ozone concentration detector 12.

[0032] like Figure 1 , 2 , as shown in 3;

[0033] A dry powder sterilization equipment of boiling low-temperature ozone, the dry powder sterilization equipment comprises an oxygen concentrator 2, an ozone generator 3, a mixing tank body and a back-blowing device 7, the oxygen concentrator 2, the ozone generator 3, the mixing tank body and the back-blowing device 7 are sequentially connected through pipelines, an air inlet pipe 1 is arranged on the outside of the oxygen concentrator 2, an exhaust pipe 8 is arranged on the outside of the back-blowing device 7, the mixing tank body comprises a turning seat 4, a sterilizing tank 5, a turning plate 9, an air distribution pipe 10 and an air outlet pipe 11, a sterilizing tank 5 is arranged in a circular rotation on the inner side of the turning seat 4, the two ends of the turning seat 4 are respectively connected to the inside of the sterilizing tube through the air inlet pipe 1 and the exhaust pipe 8, a feed port and a discharge port are arranged on the outer side of the sterilizing tank 5, and a layered device is arranged around the middle of the inner side of the sterilizing tank 5. There are several flip plates, a distribution pipe is provided in the middle of the inner side of the sterilization tank 5, and an outlet pipe 11 is horizontally provided at the inner bottom of the sterilization tank 5, the distribution pipe is communicated with the air inlet pipe 1, the outlet pipe 11 is communicated with the exhaust pipe 8, the ozone generator 3, the mixing tank body and the blowing device are sealed and connected through a stainless steel pipe and a silicone hose, the oxygen generator 2 is a 98% pure oxygen oxygen generator 2, the air inlet of the oxygen generator 2 is communicated with the external compressed air through the air inlet pipe 1, the air outlet of the oxygen generator 2 is communicated with the air inlet of the ozone generator 3 through a pipeline, the gas source of the ozone generator 3 is 98% pure oxygen produced by the oxygen generator 2, the air outlet of the ozone generator 3 is communicated with the mixing tank body through a pipeline, and the ozone generator 3 and the mixing tank body are connected. An ozone concentration detector 12 is provided on the outside of the pipeline in a connected manner, an air distribution pipe 10 is communicated with the ozone generator 3 through the air inlet pipe 1, the air distribution pipe 10 is horizontally arranged at the inner center of the sterilization tank 5, a plurality of air distribution holes are arranged in an annular manner at equal intervals on the surface of the air distribution pipe 10, and the air distribution pipe 10 distributes the ozone air flow in an umbrella-like manner through the air distribution holes, the air blowing pipe is in the shape of an annular pipe, a plurality of air guide holes are arranged in an annular manner on the surface of the air blowing pipe, the inside of the air blowing pipe is communicated with the backblowing device 7 through a pipeline, the backblowing device 7 is a two-way conductive air outlet backblowing device 7, the normal port of the backblowing device 7 is communicated with the exhaust pipe 8, the two-way port of the backblowing device 7 is communicated with the air blowing pipe through a pipeline, and a pressure detector is provided on the outside of the pipeline between the backblowing device 7 and the air blowing pipe Measuring instrument 6, the sterilizing tank 5 is a hollow tank with a tapered end and a narrow end. A turning plate 9 is welded and fixedly provided in the middle of the inner side of the sterilizing tank 5. The upper and lower ends of the sterilizing tank 5 are respectively provided with a feed port and a discharge port. The left and right ends of the sterilizing tank 5 are respectively connected to the turning seat 4 in an axially rotatable manner. The two ends of the turning seat 4 are respectively provided with an air inlet pipe 1 and an exhaust pipe 8. The air inlet pipe 1 is horizontally fixedly arranged inside the turning seat 4. The air inlet pipe 1 and the connected air distribution pipe 10 are stably connected to the inside of the sterilizing tank 5 through a bearing. The exhaust pipe 8 is arranged inside the turning seat 4 in a linkage and rotational manner. The exhaust pipe 8 and the connected air blowing pipe are fixedly passed through the surface of the sterilizing tank 5 and rotated in a linkage manner. The shape of the turning plate 9 is an arc-shaped plate with vertical folded edges on both sides.One short side of the turning plate 9 is fixedly connected to the inner wall surface of the sterilizing tank 5, and the other long side of the turning plate 9 is arranged inside the sterilizing tank 5.

[0034] Implementation examples;

[0035] A cover plate with a vacuum feeding pipe and an air-raid port is installed above the feeding port of the sterilizing tank 5, a vacuum hose is connected, and the vacuum feeder is turned on to allow the dry powder material to enter the sterilizing tank 5 under the action of negative pressure; after feeding to the process amount, the cover plate is removed, and the feeding port is closed with a blind plate, and a silicone gasket is used to seal the middle; the power supply of the turning seat 4 is turned on, and the operating frequency is controlled to make the speed 6-8 rpm, so that the sterilizing tank 5 can be rotated 360° radially; the dry powder material is in a "tumbling" state in the tank under the action of the tank body operation and the turning plate 9 in the tank; the oxygen concentrator 2 and the ozone generator 3 are turned on, and compressed air is used as the gas source to make pure oxygen through the oxygen concentrator 2, and then ozone gas is generated through the ozone generator 3, and the ozone The valve of the oxygen gas pipe is linked to open, and ozone gas enters the interior of the sterilization tank 5; the ozone gas enters the distribution pipe through the air inlet pipe 1, and is evenly distributed in an umbrella-like manner through the small air outlet holes on the distribution pipe. Under the action of the pressurized ozone gas outlet, the material is also dispersed, so that the ozone gas and the "tumbling" material are fully in contact; it is maintained for 240 minutes for sufficient sterilization; after the sterilization is completed, the dry powder material is discharged through the discharge port; during the entire sterilization process, the dry powder material is relatively light and easy to block the exhaust port. The backflush device 7 installed at the exhaust port is connected to the air outlet pipe 11 arranged inside the sterilization tank 5 through a pipeline. The backflush device 7 performs 1 second backflush every 5-10 minutes to keep the exhaust port unobstructed.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A boiling low-temperature ozone dry powder sterilization equipment, characterized in that: The dry powder sterilization equipment comprises an oxygen concentrator, an ozone generator, a mixing tank body and a back-blowing device, which are connected in sequence through pipelines. An air inlet pipe is arranged on the outside of the oxygen concentrator, and an exhaust pipe is arranged on the outside of the back-blowing device. The mixing tank body comprises a turning seat, a sterilizing tank, a turning plate, an air distribution pipe and an air outlet pipe. A sterilizing tank is provided on the inner side of the turning seat in a circular rotation manner, and the two ends of the turning seat are respectively connected with the inside of the sterilizing tube through the air inlet pipe and the exhaust pipe. A feed port and a discharge port are arranged on the outer side of the sterilizing tank, and a plurality of turning plates are arranged in layers around the middle part of the inner side of the sterilizing tank. A distribution pipe is arranged on the middle part of the inner side of the sterilizing tank, and an air outlet pipe is arranged horizontally on the inner bottom of the sterilizing tank. The distribution pipe is connected with the air inlet pipe, and the air outlet pipe is connected with the exhaust pipe.

2. The boiling low-temperature ozone dry powder sterilization equipment according to claim 1 is characterized in that: The ozone generator, the mixing tank and the blowing device are sealed and communicated with each other through a stainless steel pipe and a silicone hose.

3. The boiling low-temperature ozone dry powder sterilization equipment according to claim 1 is characterized in that: The oxygen concentrator is a pure oxygen concentrator with a purity of 98%. The air inlet of the oxygen concentrator is connected to the external compressed air through an air inlet pipe, and the air outlet of the oxygen concentrator is connected to the air inlet of the ozone generator through a pipeline. The air source of the ozone generator is 98% pure oxygen produced by the oxygen concentrator. The air outlet of the ozone generator is connected to the mixing tank body through a pipeline, and an ozone concentration detector is provided on the outside of the pipeline between the ozone generator and the mixing tank body.

4. The boiling low-temperature ozone dry powder sterilization equipment according to claim 1 is characterized in that: The air distribution pipe is connected to the ozone generator through the air inlet pipe. The air distribution pipe is horizontally arranged at the inner center of the sterilization tank. A plurality of air distribution holes are equidistantly arranged on the surface of the air distribution pipe. The air distribution pipe distributes the ozone airflow to form an umbrella surface through the air distribution holes.

5. The boiling low-temperature ozone dry powder sterilization equipment according to claim 1 is characterized in that: The air blowing pipe is in the shape of an annular tube, and a plurality of air guide holes are arranged in a ring shape on the surface of the air blowing pipe. The interior of the air blowing pipe is communicated with the back-blowing device through a pipeline. The back-blowing device is a two-way conductive air outlet back-blowing device. The normal port of the back-blowing device is communicated with the exhaust pipe, and the two-way port of the back-blowing device is communicated with the air blowing pipe through a pipeline. A pressure detector is arranged on the outside of the pipeline between the back-blowing device and the air blowing pipe.

6. The boiling low-temperature ozone dry powder sterilization equipment according to claim 1 is characterized in that: The sterilization tank is a hollow tank with a tapered end and a narrow end. A turning plate is welded and fixedly provided in the middle of the inner side of the sterilization tank. The upper and lower ends of the sterilization tank are respectively provided with a feed inlet and a discharge outlet. The left and right ends of the sterilization tank are respectively connected to the turning seat in an axially rotatable manner. The two ends of the turning seat are respectively penetrated by an air inlet pipe and an air exhaust pipe.

7. The boiling low-temperature ozone dry powder sterilization equipment according to claim 1 is characterized in that: The air inlet pipe is fixedly arranged horizontally inside the turning seat, and the air inlet pipe and the connected air distribution pipe are smoothly connected to the inside of the sterilization tank through a bearing through-type. The exhaust pipe is linked and rotatably arranged inside the turning seat, and the exhaust pipe and the connected air blowing pipe are fixedly inserted into the surface of the sterilization tank and rotate in a linked manner.

8. The boiling low-temperature ozone dry powder sterilization equipment according to claim 1 is characterized in that: The flipping plate is in the shape of an arc-shaped plate with vertical folded edges on both sides. One short side of the flipping plate is fixedly connected to the inner wall surface of the sterilization tank, and the other long side of the flipping plate is arranged inside the sterilization tank.

9. A method for sterilizing dry powder by boiling low-temperature ozone, characterized in that: The dry powder sterilization method is specifically as follows: a. Install a cover with a vacuum feeding pipe and an air-defense port above the feed port of the sterilization tank, connect the vacuum hose, turn on the vacuum feeder, and let the dry powder material enter the sterilization tank under the action of negative pressure; b. After feeding to the process volume, remove the cover plate, close the feed port with a blind plate, and seal it with a silicone gasket in the middle; c. Turn on the power of the turning seat, control the frequency of operation to make the speed 6-8 rpm, and make the sterilization tank rotate 360° radially; the dry powder material is in a "tumbling" state in the tank under the action of the tank body operation and the turning plate in the tank; d. Turn on the oxygen concentrator and ozone generator, use compressed air as the gas source, generate pure oxygen through the oxygen concentrator, and then generate ozone gas through the ozone generator. The valve of the ozone gas pipe is opened in linkage, and the ozone gas enters the sterilization tank; e. Ozone gas enters the material distribution pipe through the air inlet pipe, and then is evenly distributed through the air outlet holes on the material distribution pipe in an umbrella-like manner. Under the action of the pressurized ozone gas outlet, the material is also dispersed, so that the ozone gas and the "tumbling" material are fully in contact; f. Keep for 240 minutes to fully sterilize; After sterilization is completed, the dry powder material is discharged through the discharge port; g. During the entire sterilization process, the dry powder material is relatively light and easy to block the exhaust port. A backflush device is installed at the exhaust port. The backflush device is connected to the exhaust pipe inside the sterilization tank through a pipeline. The backflush device performs 1 second backflush every 5-10 minutes to keep the exhaust port unobstructed.

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