Evacuating system of ethylene oxide sterilizer

Abstract

The utility model discloses an ethylene oxide sterilizer evacuating system which comprises an evacuating pipe, one end of the evacuating pipe is communicated with a sterilizing cabin of a sterilizer body H, the other end of the evacuating pipe is provided with a first electromagnetic valve, a vacuum pump is further arranged on the evacuating pipe, and a gas conveying pipe is communicated with the portion, between the first electromagnetic valve and the vacuum pump, of the evacuating pipe. An air leading-in device is connected with the gas conveying pipe, a small amount of air is injected into waste gas output by the gas conveying pipe through the air leading-in device, the other end, away from the evacuation pipe, of the gas conveying pipe is communicated with a treatment box, the interior of the treatment box is divided into a decomposition cabin and an adsorption purification cabin from bottom to top, the evacuation pipe is communicated with the decomposition cabin, and the adsorption purification cabin is communicated with the adsorption purification cabin. By opening the third electromagnetic valve, air in the air tank is released into the air conveying pipe through the air conveying pipe and is mixed with the waste gas, certainly, the opening degree of the third electromagnetic valve can be set and controlled according to actual requirements, and therefore subsequent further treatment of the waste gas can be facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of sterilization treatment, in particular to an ethylene oxide sterilizer evacuation system. Background Art

[0002] The working principle of ethylene oxide (EO) sterilizer mainly depends on the chemical properties of ethylene oxide and its effect on microorganisms. Ethylene oxide is an active cyclic ether that can undergo non-specific alkylation reactions with proteins and nucleic acids in microorganisms, resulting in the death of microorganisms after a series of reactions.

[0003] The ethylene oxide sterilization process mainly includes positive pressure sterilization / micro-negative pressure sterilization and negative pressure sterilization. In actual use, it is difficult to achieve harmless centralized treatment of ethylene oxide sterilization waste gas, especially in positive pressure sterilization. Usually, after the ethylene oxide sterilizer is used, the toxic ethylene oxide sterilization mixed waste gas is directly discharged, which causes environmental pollution and also brings certain physical and mental harm to workers who are in long-term contact with the machine. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, the purpose of the utility model is to provide an ethylene oxide sterilizer evacuation system to solve the problem that the existing ethylene oxide sterilization process mentioned in the above background technology is easy to cause environmental pollution during use and will also bring certain physical and mental harm to workers who are in long-term contact with the work.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an ethylene oxide sterilizer evacuation system, comprising an evacuation pipe, one end of the evacuation pipe is connected to the sterilization chamber of the sterilizer body H and the other end is provided with a first solenoid valve, a vacuum pump is also provided on the evacuation pipe, a first air supply pipe is connected to the evacuation pipe and located in the middle of the first solenoid valve and the vacuum pump, an air introduction device is connected to the air supply pipe, a small amount of air is injected into the waste gas output by the air supply pipe through the air introduction device, the other end of the air supply pipe away from the evacuation pipe is connected to a processing box, the interior of the processing box is divided into a decomposition chamber and an adsorption purification chamber from bottom to top, and the evacuation pipe is connected to the decomposition chamber, a plurality of left and right staggered heating plates are arranged in the decomposition chamber along its height direction, and the plurality of staggered heating plates make the decomposition chamber form a multi-loop S-shaped guide channel, an adsorption unit is arranged inside the adsorption purification chamber, and an exhaust port connected to the adsorption purification chamber is also arranged on the top of the processing box.

[0007] As a preferred solution of the evacuation system of an ethylene oxide sterilizer described in the utility model, a flow meter is provided on one end of the evacuation pipe adjacent to the sterilizer body H.

[0008] As a preferred solution of the evacuation system of an ethylene oxide sterilizer described in the utility model, a second solenoid valve is further provided on one end of the gas supply pipe adjacent to the evacuation pipe.

[0009] As a preferred solution of the ethylene oxide sterilizer evacuation system described in the utility model, the air introduction device includes an air tank, a second air pipe with one end connected to the exhaust end of the air tank and the other end connected to the first air pipe, and a third solenoid valve arranged on the second air pipe.

[0010] As a preferred solution of the ethylene oxide sterilizer evacuation system described in the utility model, the heating plate includes a fixed frame fixed to the inner side of the processing box, a heating wire distributed in the inner interlayer of the fixed frame, and a graphene plate embedded in the front and back sides of the fixed frame and in contact with the heating wire.

[0011] As a preferred solution of the ethylene oxide sterilizer evacuation system described in the utility model, the adsorption unit is an activated carbon adsorption layer.

[0012] Compared with the prior art, the beneficial effect of the utility model is as follows: when it is necessary to treat the ethylene oxide waste gas in the sterilization chamber, the vacuum pump discharges the waste gas in the chamber into the gas pipe through the vacuum pipe by closing the first solenoid valve and opening the second solenoid valve. At the same time, the air introduction device can inject a small amount of low-oxygen air into the gas pipe and mix it with the waste gas, so that the subsequent heating catalytic effect is more prominent. When the waste gas enters the decomposition chamber of the treatment box, the heating plates arranged in layers and the cooperation of the multi-circuit guide channels can form sufficient contact with the ethylene oxide waste gas, so that the ethylene oxide can be effectively decomposed to obtain CO2 and H2O. Subsequently, the adsorption unit can further adsorb and purify the decomposed gas and discharge it directly through the exhaust port. In summary, the vacuum system of the ethylene oxide sterilizer has the characteristics of simple structure and reasonable design, and can effectively and harmlessly treat the ethylene oxide waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall process structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the processing box of the utility model;

[0015] Figure 3 This is a schematic diagram of the heating plate structure of the utility model.

[0016] In the figure: 100, evacuation pipe; 110, vacuum pump; 120, first solenoid valve; 130, flow meter; 200, first air pipe; 210, second solenoid valve; 300, air introduction device; 310, air tank; 320, second air pipe; 330, third solenoid valve; 400, treatment box; 410, heating plate; 4101, fixing frame; 4102, heating wire; 4103, graphene plate; 420, adsorption unit; 430, exhaust port; H, sterilizer body. DETAILED DESCRIPTION

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0018] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0019] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Figure 1-Figure 3 The schematic diagram of the whole structure of the evacuation system of an ethylene oxide sterilizer of the utility model is shown. Figure 1-Figure 3 In this embodiment, an ethylene oxide sterilizer evacuation system includes an evacuation pipe 100, one end of the evacuation pipe 100 is connected to the sterilization chamber of the sterilizer body H and the other end is provided with a first electromagnetic valve 120, a vacuum pump 110 is also provided on the evacuation pipe 100, a first air delivery pipe 200 is connected to the evacuation pipe 100 and located in the middle of the first electromagnetic valve 120 and the vacuum pump 110, and an air introduction device 300 is connected to the first air delivery pipe 200, and a small amount of waste gas outputted from the first air delivery pipe 200 is injected into the waste gas through the air introduction device 300. A amount of air is conveyed, and the other end of the first air supply pipe 200 away from the evacuation pipe 100 is connected to the processing box 400, and the interior of the processing box 400 is divided into a decomposition cabin and an adsorption purification cabin from bottom to top, and the evacuation pipe 100 is connected to the decomposition cabin, and a plurality of heating plates 410 staggered left and right are arranged in the decomposition cabin along its height direction, and a plurality of staggered heating plates 410 make the decomposition cabin form a multi-loop S-shaped guide channel, an adsorption unit 420 is arranged inside the adsorption purification cabin, and an exhaust port 430 connected to the adsorption purification cabin is also arranged on the top of the processing box 400.

[0021] A flow meter 130 is provided on the evacuation pipe 100 and at one end adjacent to the sterilizer body H. The unit gas flow rate discharged from the evacuation pipe 100 can be monitored by the flow meter 130, and the flow meter 130 is signal-connected to the control end of the evacuation system. The control end can control the air output of the air introduction device 300 according to the unit exhaust gas discharge volume of the evacuation pipe 100.

[0022] A second solenoid valve 210 is also provided on the first air supply pipe 200 and at one end adjacent to the evacuation pipe 100. It can be understood that, for example, at the beginning of the operation of the ethylene oxide sterilizer, if negative pressure or micro-pressure sterilization is adopted, it is necessary to evacuate the excess air in the sterilization chamber, and this part of the air does not need to be purified. Therefore, the second solenoid valve 210 should be closed and the first solenoid valve 120 should be opened at this time to allow the air to be directly discharged to the outside; conversely, if air purification is required, the first solenoid valve 120 should be closed and the second solenoid valve 210 should be opened, so that the exhaust gas is directly discharged to the treatment box 400 through the first air supply pipe 200. The structure is simple and the design is reasonable.

[0023] The air introduction device 300 includes an air tank 310, a second air pipe 320 connected to the exhaust end of the air tank 310 at one end and connected to the first air pipe 200 at the other end, and a third solenoid valve 330 arranged on the second air pipe 320. It should be noted that if a small amount of oxygen is added to the ethylene oxide gas during the subsequent heating catalytic decomposition process, its decomposition will be accelerated. However, since ethylene oxide is a flammable and explosive product and the concentration of pure oxygen is too high, the air tank 310 here is a micro-oxygen compression storage tank, and its internal The oxygen concentration is lower than the oxygen content in normal air, and much lower than the pure oxygen concentration, so that the ethylene oxide gas is lower than the heating explosion value. Therefore, during the process of exhaust gas being discharged from the first air pipe 200, the third solenoid valve 330 can be opened at the same time, so that the low-oxygen air in the air tank 310 is released into the first air pipe 200 through the second air pipe 320 and mixed with the exhaust gas. Of course, the opening size of the third solenoid valve 330 can be set and controlled according to actual needs, so as to facilitate the subsequent further processing of the exhaust gas.

[0024] The heating plate 410 includes a fixed frame 4101 fixed to the inner side of the processing box 400, a heating wire 4102 distributed in the inner interlayer of the fixed frame 4101, and a graphene plate 4103 embedded in the front and back sides of the fixed frame 4101 and in contact with the heating wire 4102. Here, it should be noted that if ethylene oxide is to be fully decomposed, for example, when a heating method is used, ethylene oxide needs to be heated to 300-500°C. Under this premise, the heating wire 4102 will generate an extremely high temperature after being energized, and the graphene plate 4103 has good high temperature resistance and heat conduction properties. Therefore, the surface of the heating plate 410 after heating will generate a high temperature of several hundred degrees Celsius. At the same time, the multi-circuit S-shaped guide channel can ensure that the ethylene oxide exhaust gas is in full contact with the heating plate 410, and obtain CO2 and H2O, so that the exhaust gas is fully decomposed, with the characteristics of ingenious structure and reasonable design.

[0025] Furthermore, the adsorption unit 420 is an activated carbon adsorption layer. After the heating plate 410 decomposes the ethylene oxide waste gas, it is inevitable that a small amount of ethylene oxide is not catalytically decomposed. At the same time, the decomposed gas also contains a lot of CO2. Therefore, the activated carbon adsorption layer can effectively adsorb ethylene oxide and CO2. On the one hand, it can adsorb and purify the remaining waste gas molecules, and on the other hand, it can fully adsorb and purify the odor in the waste gas and directly discharge it through the exhaust port 430. It should be noted that since the activated carbon adsorption layer has a certain service life, it does not need to participate in the main purification task of ethylene oxide. When the activated carbon adsorption layer reaches a certain service life, the activated carbon can be cleaned or replaced, which has the characteristics of low cost and convenient use.

[0026] It can be understood that the ethylene oxide sterilizer vacuum system is also equipped with a general control unit, through which each node such as the vacuum pump 110 and the solenoid valve can be opened and closed and reasonably controlled, making the system more convenient to use.

[0027] In summary, in the evacuation system of an ethylene oxide sterilizer of the present embodiment, when it is necessary to treat the ethylene oxide waste gas in the sterilization chamber, by closing the first solenoid valve 120 and opening the second solenoid valve 210, the vacuum pump 110 discharges the waste gas in the chamber to the first air pipe 200 through the evacuation pipe 100, and at the same time, the air introduction device 300 can inject air into the first air pipe 200 and mix it with the waste gas, so that the subsequent heating catalytic effect is more prominent. When the waste gas enters the decomposition chamber of the treatment box 400, the layered heating plates 410 and the cooperation of the multi-circuit guide channels can form sufficient contact with the ethylene oxide waste gas, so that the ethylene oxide can be effectively decomposed to obtain CO2 and H2O. Then the adsorption unit 420 can further adsorb and purify the decomposed gas and discharge it directly through the exhaust port 430.

[0028] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An ethylene oxide sterilizer evacuation system, characterized in that: The invention comprises an evacuation pipe (100), one end of which is connected to the sterilization chamber of the sterilizer body (H) and the other end of which is provided with a first electromagnetic valve (120). The evacuation pipe (100) is also provided with a vacuum pump (110). A first air supply pipe (200) is connected to the evacuation pipe (100) at a position between the first electromagnetic valve (120) and the vacuum pump (110). An air introduction device (300) is connected to the first air supply pipe (200). A small amount of air is injected into the waste gas outputted from the first air supply pipe (200) through the air introduction device (300). The other end of a gas transmission pipe (200) away from the evacuation pipe (100) is connected to a processing box (400), the interior of the processing box (400) is divided into a decomposition chamber and an adsorption purification chamber from bottom to top, and the evacuation pipe (100) is connected to the decomposition chamber, a plurality of heating plates (410) staggered left and right are arranged in the decomposition chamber along its height direction, and the plurality of staggered heating plates (410) enable the decomposition chamber to form a multi-loop S-shaped guide channel, an adsorption unit (420) is arranged inside the adsorption purification chamber, and an exhaust port (430) connected to the adsorption purification chamber is also arranged on the top of the processing box (400).

2. The ethylene oxide sterilizer evacuation system according to claim 1, characterized in that: A flow meter (130) is provided on one end of the evacuation tube (100) adjacent to the sterilizer body (H).

3. The ethylene oxide sterilizer evacuation system according to claim 1, characterized in that: A second solenoid valve (210) is also provided on one end of the first gas delivery pipe (200) adjacent to the evacuation pipe (100).

4. The ethylene oxide sterilizer evacuation system according to claim 1, characterized in that: The air introduction device (300) comprises an air tank (310), a second air supply pipe (320) having one end connected to the exhaust end of the air tank (310) and the other end connected to the first air supply pipe (200), and a third solenoid valve (330) arranged on the second air supply pipe (320).

5. The ethylene oxide sterilizer evacuation system according to claim 1, characterized in that: The heating plate (410) comprises a fixing frame (4101) fixed to the inner side of the processing box (400), a heating wire (4102) distributed in an inner layer of the fixing frame (4101), and a graphene plate (4103) embedded in the front and back sides of the fixing frame (4101) and in contact with the heating wire (4102).

6. The ethylene oxide sterilizer evacuation system according to claim 1, characterized in that: The adsorption unit (420) is an activated carbon adsorption layer.

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