Absorption device for ethylene oxide desorption

Abstract

The utility model discloses an absorption device for ethylene oxide desorption, which comprises a sterilization cabinet main body, an absorption tower, a desorption tower and a recovery tower, the absorption tower, the desorption tower and the recovery tower are connected with a plurality of corresponding pipelines wound on the outer side of the sterilization cabinet main body, and the absorption tower is filled with absorption liquid and is connected with the desorption tower through an absorption liquid circulating component arranged at the bottom of the absorption tower. A heating assembly for heating absorption liquid is arranged in the desorption tower, a condenser is arranged on a pipeline for connecting the outside of the desorption tower with the sterilization cabinet, and a circulating pump is arranged on a corresponding pipeline for connecting the absorption tower with the sterilization cabinet and is connected with a recovery tower of the absorption tower; according to the absorption device for ethylene oxide desorption, under continuous cooperative work of the absorption tower, the desorption tower, the condenser and the recovery tower, the overall structure is more compact, meanwhile, the functions are diversified, the energy utilization rate can be further increased through the integrated structure of the absorption device, and the phenomenon of energy and raw material waste is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ethylene oxide analysis, in particular to an absorption device for ethylene oxide analysis. Background Art

[0002] Ethylene oxide is an organic compound and a toxic carcinogen. It was previously used to make fungicides. Ethylene oxide is flammable and explosive, and is difficult to transport over long distances. Therefore, it has a strong regionality and is widely used in the washing, pharmaceutical, printing and dyeing industries. It can be used as a starter for detergents in chemical-related industries.

[0003] The ethylene oxide sterilization procedure includes preheating, prehumidification, vacuuming, heat preservation, humidification, introduction of gasified ethylene oxide to a predetermined concentration, maintaining the sterilization time, removing the ethylene oxide gas in the sterilizer, and analysis to remove the ethylene oxide residue in the sterilized items. Ethylene oxide residue mainly refers to the ethylene oxide and its reactants left in the items and packaging materials after ethylene oxide sterilization. Excessive contact with the human body can cause skin burns and irritation. Therefore, analysis is an essential procedure to remove ethylene oxide residues on the surface of the product.

[0004] The analysis can be continued in the ethylene oxide sterilizer or placed in a special fume hood. The repeatedly input air should be filtered with high efficiency, which can remove more than 99.6% of particles ≥0.3um. There are three common analysis methods on the market: vacuum analysis, forced analysis and natural ventilation analysis. After the analysis is completed, clean air needs to be introduced into the analysis room to replace the ethylene oxide in the analysis room. This process is the analysis cleaning process. The replaced ethylene oxide waste gas is extracted by the air exchange system and discharged together with the ethylene oxide waste gas discharged from the sterilizer.

[0005] At present, the main methods for treating ethylene oxide waste gas include absorption method, catalytic combustion method, etc. As a common method for treating ethylene oxide waste gas, the absorption method usually uses a solution or an adsorbent to absorb harmful substances in the waste gas. Although the absorption method can effectively remove harmful substances such as ethylene oxide in the waste gas, the traditional absorption device is often unable to better recover the ethylene oxide in the waste gas during the absorption process. For some larger sterilizers, it is also easy to cause a certain amount of raw material waste. At the same time, the absorption effect of ethylene oxide in the sterilizer is not ideal. In addition, common absorption devices have high energy consumption and are often single in function. That is, although ethylene oxide can be absorbed, additional cleaning equipment is required for the later cleaning of ethylene oxide in the sterilization cabinet, which leads to certain limitations in the use process and low energy utilization. Therefore, it is necessary to design a new and efficient absorption device for ethylene oxide analysis. Utility Model Content

[0006] The utility model aims to provide an ethylene oxide analysis absorption device, which can recover and process ethylene oxide and further improve the absorption and cleaning effects of ethylene oxide.

[0007] The technical solution adopted by the utility model to solve the above problems is:

[0008] An absorption device for ethylene oxide analysis comprises a sterilizing cabinet main body and an absorption tower, a analysis tower and a recovery tower connected to a plurality of corresponding pipelines surrounding the outside of the main body. The absorption tower is filled with absorption liquid and is connected to the analysis tower via an absorption liquid circulation component arranged at the bottom. The analysis tower is provided with a heating component for heating the absorption liquid and a condenser is arranged on the pipeline connected to the sterilizing cabinet on the outside. A circulation pump is arranged on the corresponding pipeline connecting the absorption tower to the sterilizing cabinet and is connected to the recovery tower.

[0009] Furthermore: the corresponding pipelines connecting the absorption tower and the sterilization cabinet are provided with a plurality of exhaust branches, and the exhaust pipe openings of the plurality of exhaust branches are evenly arranged on the side walls of the sterilization cabinet and are connected to the interior thereof.

[0010] Furthermore: pipe valves are provided on the main pipeline connecting the circulation pump with the recovery tower and on the exhaust branch connected with the absorption tower.

[0011] Furthermore: the analysis tower is also connected to the side wall of the sterilization cabinet through a second exhaust branch arranged on the top of the analysis tower.

[0012] Further: the second exhaust branch is provided with a second pipe valve and penetrates the side wall of the sterilization cabinet to reach the second exhaust port inside in an "inverted trapezoidal" shape.

[0013] Furthermore: an air intake assembly is also provided on the corresponding pipeline connecting the outside of the analysis tower with the sterilization cabinet. The air intake assembly is placed on the top of the sterilization cabinet, and includes an air intake pipeline composed of multiple groups of pulse spray valves. The air intake pipeline passes through the top of the sterilization cabinet and reaches the inside to form multiple air inlets.

[0014] Furthermore: the inside of the air intake pipeline and its air inlet are both equipped with an adaptable filter.

[0015] Furthermore: an opening is provided on the top of the sterilization cabinet, a mounting groove is arranged around the opening, a filter plate is installed on the mounting groove, and a sealing cover of a matching size is rotatably arranged on the outer side of the opening.

[0016] Furthermore: ventilation ducts consisting of a plurality of fan plates are arranged on both side walls of the sterilizing cabinet at positions corresponding to the exhaust pipe opening and on the top position.

[0017] Furthermore: a plurality of isolation strips are distributed at corresponding positions on the inner walls of both sides of the sterilization cabinet, and a storage plate adapter is arranged inside the sterilization cabinet, which is fixed above the isolation strips at corresponding positions on both sides, and a plurality of ventilation holes are opened on the storage plate.

[0018] Compared with the prior art, the utility model has the following advantages and effects:

[0019] The utility model discloses an ethylene oxide analysis absorption device. With the continuous cooperation of the absorption tower, the analysis tower, the condenser and the recovery tower, the ethylene oxide analysis absorption device can further improve the absorption effect of the ethylene oxide waste gas generated in the sterilization process in the sterilization cabinet. Through the absorption effect of the absorption tower and the absorption liquid inside for absorbing ethylene oxide, the waste gas without ethylene oxide can be directly processed and discharged uniformly through the recovery tower. In addition, with the cooperation of the absorption liquid circulation component and the heating component in the analysis tower, the ethylene oxide can be further uniformly collected and processed. At the same time, the purified gas can continue to be introduced into the sterilization cabinet, which is convenient for the later cleaning of the sterilization cabinet. The overall structure of the absorption device is more compact and the functions are diversified, which can further improve the working efficiency and working stability. In addition, the integrated structure of the absorption device can further improve the energy utilization rate and effectively reduce the waste of energy and raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of an absorption device for ethylene oxide analysis according to an embodiment of the utility model.

[0021] Figure 2 It is a partially enlarged view of an absorption device for ethylene oxide analysis according to an embodiment of the utility model.

[0022] Figure 3 A partial enlarged view of the internal structure of the sterilizing cabinet in an embodiment of the utility model.

[0023] Figure 4 It is a partial enlarged view of the external structure of the sterilizing cabinet in the embodiment of the utility model.

[0024] Figure 5 A partial enlarged view of the internal structure of the sterilizing cabinet in an embodiment of the utility model.

[0025] Figure numbers: sterilization cabinet 100, opening 101, mounting groove 1011, filter plate 1012, sealing cover 102, isolation strip 103, pipeline 110, exhaust branch 111, exhaust port 1111, pipe valve 112, second exhaust branch 113, second exhaust port 1131, second pipe valve 1132, absorption tower 1, analysis tower 2, recovery tower 3, absorption liquid circulation component 4, condenser 5, circulation pump 6, air intake component 7, air intake pipeline 71, pulse spray valve 72, air intake port 73, filter screen 731, fan plate 8, storage plate 9, ventilation hole 91. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0027] See also Figure 1-2 The present embodiment relates to an absorption device for ethylene oxide analysis, including a sterilizing cabinet 100 main body and an absorption tower 1, a analysis tower 2 and a recovery tower 3 connected to a plurality of corresponding pipelines 110 surrounding the outside thereof. The absorption tower 1 is filled with absorption liquid and is connected to the analysis tower 2 through an absorption liquid circulation component 4 arranged at the bottom. The analysis tower 2 is provided with a heating component for heating the absorption liquid and a condenser 5 is arranged on the pipeline 110 connected to the sterilizing cabinet 100 on the outside. A circulation pump 6 is arranged on the corresponding pipeline 110 connecting the absorption tower 1 to the sterilizing cabinet 100 and is connected to the recovery tower 3.

[0028] Specifically in this embodiment, the sterilizing cabinet 100 adopts the structure of a traditional ethylene oxide sterilizing cabinet 100. During the process of releasing ethylene oxide from the sterilizing cabinet 100 to sterilize the items inside the cabinet, the absorption tower 1 can discharge the ethylene oxide waste gas generated in the sterilizing cabinet 100 through the corresponding pipeline 110 surrounding the outside of the sterilizing cabinet 100. The ethylene oxide waste gas can reach the inside of the absorption tower 1 under the action of the circulation pump 6 provided on the corresponding pipeline 110 connecting the absorption tower 1 and the sterilizing cabinet 100, and can absorb the ethylene oxide mixed in the waste gas under the action of the absorption liquid filled in the absorption tower 1. The gas that does not contain ethylene oxide after being absorbed by the absorption liquid can be discharged by the action of the circulation pump 6. The ethylene oxide in the absorption tower 1 can be circulated to the analysis tower 2 by the absorption liquid circulation component 4 connected to the analysis tower 2 at the bottom of the absorption tower 1. The absorption liquid containing ethylene oxide in the analysis tower 2 can be heated to a suitable temperature by the heating component provided in the analysis tower 2. The ethylene oxide contained in the absorption liquid in the analysis tower 2 is further analyzed and separated by the heating component during the heating process. The ethylene oxide after analysis and separation can be condensed by the condenser 5 provided on the corresponding pipeline 110 of the analysis tower 2. Afterwards, it is purified and recovered in the adapter cavity of the analysis tower 2. The gas condensed and purified by the condenser 5 can enter the sterilization cabinet 100 along the pipeline 110 for cleaning after the sterilization is completed. Under the continuous cooperation of the absorption tower 1, the analysis tower 2, the condenser 5 and the recovery tower 3, this ethylene oxide analysis absorption device can further improve the absorption effect of the ethylene oxide waste gas generated during the sterilization process in the sterilization cabinet 100. Under the absorption effect of the absorption tower 1 and the absorption liquid inside it for absorbing ethylene oxide, the waste gas without ethylene oxide can also be directly processed and discharged uniformly through the recovery tower 3, and the ethylene oxide can be further uniformly collected and processed under the action of the absorption liquid circulation component 4 and the heating component in the analysis tower 2. At the same time, the purified gas can continue to be introduced into the sterilization cabinet 100, which is also convenient for the later cleaning of the sterilization cabinet 100, making the overall structure of this absorption device more compact and the functions more diverse, which can further improve the working efficiency and working stability, and the integrated structure of this absorption device can further improve the energy utilization rate, effectively reduce the waste of energy and raw materials, and in addition, the absorption liquid circulation component 4 described specifically can adopt the traditional coolant circulation pump 6 structure, while ensuring the stable circulation of the absorption liquid, it can also maintain the stability and uniformity of the absorption liquid temperature in the circulation process with the cooperation of the heating component in the analysis tower 2, and avoid the absorption liquid in the absorption tower 1. The temperature is too high or too low and the adverse effect on the absorption effect is caused.Further improve the absorption effect and absorption stability of the absorption liquid during the recycling process, and reduce the consumption of the absorption liquid and the generation of waste liquid.

[0029] The corresponding pipeline 110 connecting the absorption tower 1 and the sterilization cabinet 100 is provided with a plurality of exhaust branches 111, and the exhaust pipe openings of the plurality of exhaust branches 111 are evenly arranged on the side walls of the sterilization cabinet 100 and communicated with the interior thereof, such as Figure 1 or Figure 3 As shown in , the arrangement of the multiple exhaust branches 111 can improve the exhaust efficiency of the ethylene oxide waste gas in the sterilizer 100. At the same time, the arrangement of the exhaust pipe openings evenly arranged on the side walls of the sterilizer 100 can further reduce the residence time of the ethylene oxide waste gas, and the exhaust pipe openings are relatively dispersed to make the ethylene oxide waste gas discharge more uniform, which can effectively reduce the phenomenon of inconsistent sterilization effect caused by excessive local concentration of ethylene oxide waste gas in the sterilizer 100.

[0030] The main pipeline 110 connecting the circulation pump 6 with the recovery tower 3 and the exhaust branch 111 connecting the absorption tower 1 are both provided with a pipe valve 112. Figure 2 As shown, the setting of the pipe valve 112 on the corresponding pipeline 110 can facilitate the control and adjustment of the internal flow and pressure of the pipeline 110, ensure the stable circulation of gas, and improve the flexibility and convenience in the operation process, so as to facilitate daily inspection and later maintenance. In addition, by controlling the pipe valve 112, the opening 101 of the main pipeline 110 between the circulation pump 6 and the recovery tower 3 can be appropriately smaller than the opening 101 on the exhaust branch 111 connected to the absorption tower 1, thereby further improving the absorption stability and absorption effect of the absorption liquid in the absorption tower 1 on the ethylene oxide waste gas, reducing the residual ethylene oxide in the waste gas, and further avoiding the phenomenon that the residual ethylene oxide in the waste gas in the recovery tower 3 is discharged outside the tower body to pollute the environment or even harm the human body.

[0031] The analysis tower 2 is also connected to the side wall of the sterilization cabinet 100 through a second exhaust branch 113 arranged on the top thereof. The redundant setting of the second exhaust branch 113 on the top of the analysis tower 2 can allow the ethylene oxide gas in the analysis tower 2 that has not been condensed and purified by the condenser 5 to enter the sterilization cabinet 100 through the second exhaust branch 113 to supplement the required ethylene oxide raw material when the sterilization process of the sterilization cabinet 100 is affected by insufficient ethylene oxide raw material during the sterilization process, thereby ensuring the stability of the sterilization process and facilitating the filling of ethylene oxide raw materials without affecting the sterilization effect, thereby meeting the usage requirements in different situations.

[0032] The second exhaust branch 113 is provided with a second pipe valve 1132 and penetrates the side wall of the sterilizing cabinet 100 to reach the second exhaust port 1131 inside in an "inverted trapezoidal" shape. The second pipe valve 1132 can realize the conduction and closing of the second exhaust branch 113, thereby ensuring that the sterilizing cabinet 100 maintains the closed state of the second exhaust branch 113 during the normal sterilization process with sufficient ethylene oxide, avoiding the influence of unnecessary ethylene oxide gas on the sterilization process. At the same time, Figure 3 As shown in the figure, when the ethylene oxide raw material in the sterilizer 100 is insufficient and the second pipe valve 1132 needs to be opened, the second exhaust port 1131 arranged in an "inverted trapezoid" can effectively reduce the flow rate of the ethylene oxide gas in the second exhaust branch 113 flowing into the sterilizer 100, and discharge it upward along its two edges, which is helpful for the diffusion process of the ethylene oxide gas in the sterilizer 100, reduces the accumulation and excessive concentration of the ethylene oxide gas caused by the excessively fast flow rate of the introduced ethylene oxide gas, which affects the sterilization effect and the adverse effects on the equipment, and improves the stability during operation.

[0033] See also Figure 3-4 The corresponding pipeline 110 connecting the outside of the analysis tower 2 with the sterilization cabinet 100 is also provided with an air intake component 7, and the air intake component 7 is placed on the top of the sterilization cabinet 100, which includes an air intake pipeline 71 composed of multiple groups of pulse spray valves 72. The air intake pipeline 71 passes through the top of the sterilization cabinet 100 and reaches the inside to form multiple air inlets 73. The gas condensed and purified by the condenser 5 inside the analysis tower 2 can enter the sterilization cabinet 100 through the air intake component 7 arranged on the corresponding pipeline 110. Specifically, the gas flows through the air intake pipeline 71 and enters the inside of the sterilization cabinet 100 from the top of the sterilization cabinet 100 under the blowing action of the multiple groups of pulse spray valves 72 and sprays downward. The pulse spray valves 72 of the air intake component 7 The pulse spray valve 72 can be opened and closed in corresponding quantities and the spray frequency can be adaptively adjusted according to specific usage requirements, so that the ethylene oxide waste gas remaining in the sterilization cabinet 100 after sterilization is completed can be cleaned, and the exhaust pipe openings at corresponding positions on the side walls of the sterilization cabinet 100 can continuously circulate and clean the waste gas remaining in the sterilization cabinet 100, thereby further improving the cleaning effect and cleaning efficiency. In addition, according to specific usage requirements, the pulse spray valve 72 of the air intake component 7 can also be opened and closed in corresponding quantities during the sterilization process, which can further enhance the airflow circulation and mixing effects without affecting the sterilization effect, and effectively control the internal ethylene oxide concentration to ensure safety during the sterilization process.

[0034] An adaptable filter 731 is installed inside the air inlet pipe 71 and at the air inlet port 73. The filter 731 can effectively prevent impurities contained in the gas in the sterilization cabinet 100 from entering the air inlet pipe 71 and causing unnecessary impact on the air inlet component 7. At the same time, the gas flowing in the air inlet pipe 71 can be further filtered and impurities removed, thereby ensuring the cleaning effect and further improving the operating stability of the air inlet component 7 during the cleaning process.

[0035] The sterilizing cabinet 100 has an opening 101 at the top, and a mounting groove 1011 is arranged around the opening 101. A filter plate 1012 is installed on the mounting groove 1011, and a sealing cover 102 of a suitable size is rotatably arranged outside the opening 101. Figure 4 As shown, the sealing cover 102 rotatably arranged at the opening 101 can ensure a certain sealing inside the sterilization cabinet 100, and the sealing cover 102 can also be rotated to pass through the top opening 101 of the sterilization cabinet 100, thereby meeting the operational requirements of daily inspection and later maintenance of the sterilization cabinet 100. At the same time, the filter plate 1012 installed on the mounting groove 1011 placed at the opening 101 is convenient for installation, disassembly and replacement, and can further avoid the leakage of harmful gases in the sterilization cabinet 100 when the sealing cover 102 is closed, which is also convenient for operators to operate, further improves the maintenance efficiency and reduces the damage to the sterilization cabinet 100 caused to the maintenance process.

[0036] The sterilizing cabinet 100 is provided with ventilation ducts composed of a plurality of fan plates 8 on both side walls and the top position at positions corresponding to the exhaust pipe opening. Figure 5 As shown, the ventilation duct composed of a plurality of fan plates 8 can further improve the uniformity of diffusion of ethylene oxide gas in the sterilization cabinet 100, further improve the fluidity and conductivity of ethylene oxide, reduce the residual and accumulation of ethylene oxide gas, and help to further improve the sterilization effect.

[0037] A plurality of isolation strips 103 are distributed at corresponding positions on the inner walls of both sides of the sterilizing cabinet 100. A storage plate 9 is arranged inside the sterilizing cabinet 100, and the storage plate 9 is fixed above the isolation strips 103 at corresponding positions on both sides. A plurality of ventilation holes 91 are provided on the storage plate 9. The storage plate 9 placed above the isolation strips 103 at both sides of the sterilizing cabinet 100 can facilitate the placement of sterilized items, and can be placed in multiple layers according to the specific number of items to be sterilized through the plurality of isolation strips 103 at corresponding positions on both sides of the sterilizing cabinet 100, so as to meet different usage requirements, improve the sterilization efficiency, and the plurality of ventilation holes 91 provided on the storage plate 9 can further reduce the contact area between the storage plate 9 and the items to be sterilized, so as to further improve the sterilization effect.

[0038] The above contents described in this specification are merely examples of the present utility model. Those skilled in the art of the present utility model may make various modifications or additions to the specific embodiments described, or replace them in similar ways, as long as they do not deviate from the contents of the present utility model specification or exceed the scope defined in the claims, they shall all fall within the protection scope of the present utility model.

Claims

1. An absorption device for ethylene oxide analysis, characterized in that: It includes a sterilization cabinet main body and an absorption tower, a decomposition tower and a recovery tower connected to a plurality of corresponding pipelines surrounding the outside thereof. The absorption tower is filled with absorption liquid and is connected to the decomposition tower through an absorption liquid circulation component arranged at the bottom. The decomposition tower is provided with a heating component for heating the absorption liquid and a condenser is arranged on the pipeline connected to the sterilization cabinet on the outside. A circulation pump is arranged on the corresponding pipeline connecting the absorption tower to the sterilization cabinet and is connected to the recovery tower.

2. The ethylene oxide analysis absorption device according to claim 1, characterized in that: The corresponding pipelines connecting the absorption tower and the sterilization cabinet are provided with a plurality of exhaust branches, and the exhaust pipe openings of the plurality of exhaust branches are evenly arranged on the side walls of both sides of the sterilization cabinet and are connected with the interior thereof.

3. The ethylene oxide analysis absorption device according to claim 2, characterized in that: Pipe valves are provided on the main pipeline connecting the circulation pump with the recovery tower and on the exhaust branch connected with the absorption tower.

4. The ethylene oxide analysis absorption device according to claim 1, characterized in that: The analytical tower is also connected to the side wall of the sterilizing cabinet through a second exhaust branch arranged on the top of the analytical tower.

5. The ethylene oxide analysis absorption device according to claim 4, characterized in that: The second exhaust branch is provided with a second pipe valve and penetrates the side wall of the sterilizing cabinet to reach the second exhaust port inside in an "inverted trapezoidal" shape.

6. The ethylene oxide analysis absorption device according to claim 1, characterized in that: An air intake assembly is also provided on the corresponding pipeline connecting the outside of the analysis tower with the sterilization cabinet. The air intake assembly is placed on the top of the sterilization cabinet and includes an air intake pipeline composed of multiple groups of pulse spray valves. The air intake pipeline passes through the top of the sterilization cabinet and reaches the inside to form multiple air inlets.

7. The ethylene oxide analysis absorption device according to claim 6, characterized in that: The inside of the air intake pipeline and the air intake port thereof are both equipped with matching filters.

8. The ethylene oxide analysis absorption device according to claim 1, characterized in that: An opening is provided on the top of the sterilizing cabinet, a mounting groove is arranged around the opening, a filter plate is installed on the mounting groove, and a sealing cover of a suitable size is rotatably arranged on the outer side of the opening.

9. The ethylene oxide analysis absorption device according to claim 1, characterized in that: Ventilation ducts consisting of a plurality of fan plates are arranged on the side walls of the sterilizing cabinet at positions corresponding to the exhaust pipe opening and on the top position.

10. The ethylene oxide decomposition absorption device according to claim 1, characterized in that: A plurality of isolation strips are distributed at corresponding positions on the inner walls of both sides of the sterilizing cabinet. A storage board adapter is arranged inside the sterilizing cabinet and is fixed above the isolation strips at corresponding positions on both sides. A plurality of ventilation holes are opened on the storage board.

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