Electron beam irradiation sterilization processing method and irradiation system

Abstract

The invention discloses an electron beam irradiation sterilization processing method and an irradiation system, and particularly relates to the technical field of electron irradiation sterilization. Compared with the prior art, the invention has the following beneficial effects: through a mode of setting the ratio of the irradiation dose according to the product volume, irradiation sterilization without excessive irradiation dose can be realized, the degree of influence of excessive irradiation on the product is reduced, meanwhile, accurate and effective irradiation sterilization treatment is implemented on the product by using each set parameter, and irradiation and cooling synchronously act on the product, so that the product quality is improved. The device plays a role in preventing a product from being cured due to high temperature in an irradiation area, ensures the originality of the product, has a structure function of circulating conveying and irradiation processing, and is high in irradiation sterilization efficiency.

Description

Technical Field

[0001] The present invention specifically relates to an electron beam irradiation sterilization processing method and an irradiation system, and belongs to the technical field of electron beam irradiation sterilization application. Background Art

[0002] Radiation sterilization is an effective method of using electromagnetic waves generated by ionizing radiation to kill microorganisms on most substances. The rays used for sterilization include electron beams, X-rays, and gamma rays. In the actual sterilization process of electron beam irradiation sterilization currently used for product sterilization, the electron beam irradiation setting parameter direction is insufficient, which affects the quality of irradiation sterilization. In addition, the irradiated products of different volumes have the problem of excessive or insufficient irradiation dosage, and the irradiation sterilization effect of the products is not good. Therefore, in view of the above problems, an electron beam irradiation sterilization processing method and irradiation system are proposed. Summary of the invention

[0003] The purpose of the present invention is to provide an electron beam irradiation sterilization processing method and an irradiation system in order to solve the above problems.

[0004] The present invention achieves the above-mentioned purpose through the following technical scheme, an electron beam irradiation sterilization processing method, specifically comprising the following steps:

[0005] Step 1: According to the volume of the product to be sterilized by electron beam irradiation, set the maximum irradiation dose and the minimum irradiation dose for it, and the product area dose ratio is 1.1:1 to 1:1;

[0006] Step 2: accelerator settings: repetition frequency 20.0 Hz, scanning frequency 9.0 Hz, scanning current 5.4-5.8 A, charging voltage 300.0 V, beam speed 84.0-85.1 mm / s;

[0007] Step 3: Preheating time before beam emission: low preheating time is 300 seconds, high preheating time is 317 seconds, automatic frequency is 600Hz;

[0008] Step 4: using a conveyor line to deliver to the electron beam irradiation area in a batch density ratio of 95.1%;

[0009] Step 5: Use a water cooling unit to cool the irradiated product;

[0010] Step 6. After sterilization and cooling, the product surface sterilization quality is inspected. If the irradiation sterilization quality is not sufficient, it is concentrated on the inner conveyor line and irradiated again with a small irradiation dose for precise positioning.

[0011] Preferably, the product area to dose ratio is 1.1:1.

[0012] Preferably, the accelerator is set at: a repetition frequency of 20.0 Hz, a scanning frequency of 9.0 Hz, a scanning current of 5.8 A, a charging voltage of 300.0 V, and a beam speed of 85 mm / s.

[0013] Preferably, the plate chain speed of the conveyor line is 85 mm / s.

[0014] Preferably, the status display of the water cooling unit is divided into constant temperature and cooling. Normal constant temperature: flow rate is 151.00-153.70, water temperature is 25.0-25.1°C; normal cooling: flow rate is 78.30-79.20, water temperature is 24.3°C.

[0015] An irradiation system includes an accelerator, a circulating conveyor line, an irradiation shielding processing workshop, a water cooling unit and a vacuum environment simulator. The accelerator is arranged in the irradiation shielding processing workshop and is used to accelerate electrons to the speed of light and hit the surface of products on the circulating conveyor line to kill bacteria. The water cooling unit is synchronized with the electron beam irradiation and is used to cool the heat generated by the electron beam irradiation on the product surface.

[0016] Preferably, the safety interlock specifically includes a safety interlock state, an operating console key, an emergency stop state, an inspection state, a fan state and a door state.

[0017] Preferably, the vacuum operating state of the vacuum environment simulator is: input level: 2984V, 4.364E-5A; output level: 2989V, 2.161E-4A; scanning box: 2999V, 8.814E-5A.

[0018] The beneficial effects of the present invention are as follows: by setting the ratio of the irradiation dose according to the volume of the product, irradiation sterilization can be performed without excessive irradiation dose, reducing the degree of influence of excessive irradiation on the product, and at the same time utilizing various set parameters to implement precise and effective irradiation sterilization treatment on the product. By simultaneously acting on the product through irradiation and cooling, the product is prevented from being matured due to high temperature in the irradiation zone, thereby ensuring the originality of the product. The product has the structural function of circulating conveying irradiation processing and has high irradiation sterilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 is a flow chart of the method of the present invention;

[0021] Figure 2This is a distribution diagram of the operating interface of the irradiation system of the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0024] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 the present invention.

[0025] See also Figure 1 As shown, an electron beam irradiation sterilization processing method specifically includes the following steps:

[0026] Step 1: According to the volume of the product to be sterilized by electron beam irradiation, set the maximum irradiation dose and the minimum irradiation dose for it, and the product area dose ratio is 1.1:1 to 1:1;

[0027] Step 2: accelerator settings: repetition frequency 20.0 Hz, scanning frequency 9.0 Hz, scanning current 5.4-5.8 A, charging voltage 300.0 V, beam speed 84.0-85.1 mm / s;

[0028] Step 3: Preheating time before beam emission: low preheating time is 300 seconds, high preheating time is 317 seconds, automatic frequency is 600Hz;

[0029] Step 4: using a conveyor line to deliver to the electron beam irradiation area in a batch density ratio of 95.1%;

[0030] Step 5: Use a water cooling unit to cool the irradiated product;

[0031] Step 6. After sterilization and cooling, the product surface sterilization quality is inspected. If the irradiation sterilization quality is not sufficient, it is concentrated on the inner conveyor line and irradiated again with a small irradiation dose for precise positioning.

[0032] Furthermore, the product area dose ratio is 1.1:1.

[0033] Furthermore, the accelerator was set to have a repetition frequency of 20.0 Hz, a scan frequency of 9.0 Hz, a scan current of 5.8 A, a charge voltage of 300.0 V, and a beam velocity of 85 mm / s.

[0034] Furthermore, the plate chain speed of the conveyor line is 85 mm / s.

[0035] Furthermore, the status display of the water cooling unit is divided into constant temperature and cooling. The constant temperature is normal: the flow rate is 151.00-153.70, and the water temperature is 25.0-25.1°C; the cooling is normal: the flow rate is 78.30-79.20, and the water temperature is 24.3°C.

[0036] See also Figure 2 As shown, an irradiation system includes an accelerator, a circulating conveyor line, an irradiation shielding processing workshop, a water cooling unit and a vacuum environment simulator. The accelerator is arranged in the irradiation shielding processing workshop, and is used to accelerate electrons to the speed of light and hit the surface of the product on the circulating conveyor line to kill bacteria. The water cooling unit is synchronized with the electron beam irradiation to cool the heat generated by the electron beam irradiation on the product surface.

[0037] Furthermore, the safety interlock specifically includes a safety interlock status, an operating console key, an emergency stop status, an inspection status, a fan status and a door status.

[0038] Furthermore, the vacuum operating state of the vacuum environment simulator is: input level: 2984V, 4.364E-5A; output level: 2989V, 2.161E-4A; scanning box: 2999V, 8.814E-5A.

[0039] The benefits of the present invention lie in that, by setting the ratio of the irradiation dose according to the volume of the product, irradiation sterilization can be performed without excessive irradiation dose, reducing the degree of influence of excessive irradiation on the product, and at the same time, various set parameters are used to implement accurate and effective irradiation sterilization treatment on the product. By irradiating and cooling the product simultaneously, the product is prevented from being matured due to high temperature in the irradiation zone, thereby ensuring the originality of the product. The product has the structural function of circulating and conveying irradiation processing and has high irradiation sterilization efficiency.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and scope of the elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0041] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electron beam irradiation sterilization processing method, characterized in that: The specific steps include: Step 1: According to the volume of the product to be sterilized by electron beam irradiation, set the maximum irradiation dose and the minimum irradiation dose for it, and the product area dose ratio is 1.1:1 to 1:1; Step 2: accelerator settings: repetition frequency 20.0 Hz, scanning frequency 9.0 Hz, scanning current 5.4-5.8 A, charging voltage 300.0 V, beam speed 84.0-85.1 mm / s; Step 3: Preheating time before beam emission: low preheating time is 300 seconds, high preheating time is 317 seconds, automatic frequency is 600Hz; Step 4: using a conveyor line to deliver to the electron beam irradiation area in a batch density ratio of 95.1%; Step 5: Use a water cooling unit to cool the irradiated product; Step 6. After sterilization and cooling, the product surface sterilization quality is inspected. If the irradiation sterilization quality is not sufficient, it is concentrated on the inner conveyor line and irradiated again with a small irradiation dose for precise positioning.

2. The electron beam irradiation sterilization processing method according to claim 1, characterized in that: The product area area dose ratio is 1.1:

1.

3. The electron beam irradiation sterilization processing method according to claim 1, characterized in that: The accelerator settings are: repetition frequency of 20.0 Hz, scanning frequency of 9.0 Hz, scanning current of 5.8 A, charging voltage of 300.0 V, and beam speed of 85 mm / s.

4. The electron beam irradiation sterilization processing method according to claim 1, characterized in that: The plate chain speed of the conveyor line is 85 mm / s.

5. The electron beam irradiation sterilization processing method according to claim 1, characterized in that: The status display of the water cooling unit is divided into constant temperature and cooling. Normal constant temperature: flow rate is 151.00-153.70, water temperature is 25.0-25.1°C; normal cooling: flow rate is 78.30-79.20, water temperature is 24.3°C.

6. An irradiation system, characterized in that: It includes an accelerator, a circulating conveyor line, an irradiation shielding processing workshop, a water cooling unit and a vacuum environment simulator. The accelerator is set in the irradiation shielding processing workshop, and is used to accelerate electrons to the speed of light and hit the surface of products on the circulating conveyor line to kill bacteria. The water cooling unit is synchronized with the electron beam irradiation to cool the heat generated by the electron beam irradiation on the product surface.

7. An irradiation system further includes a safety interlock, characterized in that: Specifically including safety interlock status, console key, emergency stop status, inspection status, fan status and door status.

8. According to an irradiation system, characterized in that: The vacuum operating state of the vacuum environment simulator is as follows: input level: 2984V, 4.364E-5A; output level: 2989V, 2.161E-4A; scanning box: 2999V, 8.814E-5A.

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