Ethylene oxide resolver convenient for waste heat utilization

Abstract

The utility model relates to the technical field of disinfection and sterilization, in particular to an ethylene oxide resolver convenient for waste heat utilization, which comprises a heat exchange box, a catalysis box and a heating box which are sequentially stacked along a first direction, a heating component is arranged in the heating box, a catalyst is accommodated in the catalysis box, and the heat exchange box comprises a shell and a heat exchange tube extending along the first direction. A heat exchange space is formed in the shell, the heat exchange pipe is inserted into the heat exchange space, the two ends of the heat exchange pipe penetrate out of the shell, one end of the heat exchange pipe is communicated with the catalytic box, a fan is arranged at the other end of the heat exchange pipe, an air inlet and an air outlet which are communicated with the heat exchange space are formed in the two ends of the shell in the second direction respectively, and the first direction is perpendicular to the second direction. The air outlet communicates with the end, away from the catalytic box, of the heating box through a pipeline.

Description

Technical Field

[0001] This utility model relates to the field of disinfection and sterilization technology, and in particular to an ethylene oxide desorber that facilitates waste heat utilization. Background Technology

[0002] Ethylene oxide is an organic compound used to manufacture disinfectants, which are widely used in industries such as detergents, pharmaceuticals, and printing and dyeing. In chemical-related industries, it can be used as a starting agent for cleaning agents. After sterilizing products using ethylene oxide in a sterilizer, the ethylene oxide waste gas from the sterilizer needs to be passed through a desorber for decomposition, allowing the ethylene oxide waste gas to break down into other harmless substances for subsequent harmless discharge.

[0003] In the relevant technical solution, the ethylene oxide desorber includes an air heating chamber and a catalytic chamber. After fresh air enters the heating chamber, the airflow is heated by heating components within the chamber. The high-temperature gas then enters the catalytic chamber, where it, along with metal oxides or zeolite molecular sieves, decomposes ethylene oxide into smaller molecules such as ethylene or acetaldehyde. A fan is then activated to extract the gas from the catalytic chamber, and the treated gas is discharged from the fan.

[0004] In the above technical solution, unheated fresh air from the outside enters the heating chamber directly. Heating this fresh air to a suitable temperature requires a significant amount of energy, necessitating continuous heating of the resistance wires and other components within the heating chamber. Furthermore, the gas discharged from the catalytic chamber is at a high temperature, making it difficult to effectively utilize its residual heat. This high-temperature gas can also cause excessively high ambient temperatures in the operating area, affecting the working environment for staff. Utility Model Content

[0005] This invention provides an ethylene oxide desorber that facilitates waste heat utilization, and can solve at least one of the above-mentioned technical problems.

[0006] To solve the above-mentioned technical problems, one or more embodiments of this utility model provide an ethylene oxide desorber that facilitates waste heat utilization, including a heat exchange box, a catalytic box, and a heating box arranged in sequence along a first direction. The heating box is equipped with a heating component, and the side wall of the heating box has a waste gas inlet connected to an ethylene oxide waste gas discharge pipe. The catalytic box contains a catalyst. The heat exchange box includes a shell and a heat exchange tube extending along the first direction. A heat exchange space is formed inside the shell, and the heat exchange tube is inserted into the heat exchange space. Both ends of the heat exchange tube extend out of the shell. One end of the heat exchange tube is connected to the catalytic box, and the other end is equipped with a fan. An air inlet and an air outlet connected to the heat exchange space are respectively installed at both ends of the shell along a second direction. The first direction and the second direction are perpendicular. The air inlet is used to input fresh air from the outside, and the air outlet is connected to the end of the heating box away from the catalytic box through a pipeline.

[0007] Furthermore, the heating box, catalytic box, and heat exchange box are each independently set up, and are connected to each other by flanges and fasteners. The heat exchange tubes are multiple vertical tubes, with both ends of the heat exchange tubes passing through the upper and lower ends of the heat exchange box, and the lower end of the heat exchange box is equipped with an air guide hood.

[0008] Furthermore, the heating chamber and the catalytic chamber share a first partition, which has a connecting port and a valve for opening and closing. The catalytic chamber and the heating chamber share a second partition. The heat exchange tube is multi-segmented and bent to form multiple straight tube segments. Adjacent straight segments are connected by bent segments. The bent segment of the heat exchange tube on the side closer to the catalytic chamber passes through the shell and enters the catalytic chamber.

[0009] Furthermore, the heat exchange tubes have a split structure, with multiple straight tubes forming straight sections and multiple bent tubes forming bent sections. The two ends of the straight tubes extend out of the shell along the first direction, and adjacent straight tubes are connected by bent tubes.

[0010] The beneficial effects of one or more of the above technical solutions are as follows:

[0011] In this design, the ethylene oxide desorber includes a heat exchange box, a catalytic converter, and a heating box arranged sequentially along a first direction. This arrangement places the heating box and heat exchange box on opposite sides of the catalytic converter along the first direction, facilitating the separation of the air inlet and outlet sides of the catalytic converter and allowing for sufficient airflow within the catalytic converter, resulting in more thorough decomposition of ethylene oxide. Furthermore, the three boxes are stacked sequentially along the first direction, effectively reducing their space requirements.

[0012] In this design, the heat exchange box includes a shell and heat exchange tubes extending along a first direction. The inner cavity of the shell forms a heat exchange space. An air inlet and an air outlet are connected to opposite sides of the heat exchange space along a second direction. The air outlet is connected to the heating box via a pipe. The heat exchange tubes connect to the catalytic converter and the fan. In this configuration, the exhaust gas with residual heat within the heat exchange space flows perpendicularly to the relatively cooler ambient air. The ambient air and the exhaust gas with residual heat exchange heat through the heat exchange tubes. This configuration improves the heat exchange efficiency and increases the temperature of the fresh air before it enters the heating box, thereby reducing the energy consumed by the heating components within the heating box while effectively utilizing the waste heat of the exhaust gas.

[0013] In this design, the heating chamber, catalytic converter, and heat exchanger each share a partition, thus reducing the overall space occupied by the resolver and achieving a lightweight design. Furthermore, the heat exchanger tube includes straight and curved sections. The curved section of the heat exchanger tube, near the catalytic converter, extends out of the casing and into the catalytic converter. This design allows the curved section of the heat exchanger tube to exchange heat with the high-temperature gas inside the catalytic converter, thereby increasing the temperature of the gas inside the heat exchanger tube. This ensures that the heat exchanger tube can fully heat the fresh air in the heat exchange space, preventing the heat exchanger tube temperature from dropping too quickly due to the fresh air. In this design, the heat exchanger tube adopts a split structure combining straight and curved tubes, which facilitates quick assembly and disassembly when the heat exchanger tube needs to extend out of the casing.

[0014] In this scheme, with multiple vertical heat exchange tubes, each end of which extends out of the upper and lower ends of the heat exchange box, and a wind guide shroud installed at the lower end of the heat exchange box, the gas in the catalytic converter can be quickly transferred to the heat exchange box and the external environment through the combined use of multiple heat exchange tubes, thereby increasing the exhaust speed of the catalytic converter. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of the overall structure in Embodiment 1 of this utility model;

[0016] Figure 2 This is a top view of the heat exchange box in Embodiment 1 of this utility model;

[0017] Figure 3 This is a cross-sectional view of the heat exchange box in Embodiment 2 of this utility model from the main view direction;

[0018] Figure 4 This is a schematic diagram of the straight pipe moving towards the catalyst box to its limit position along the first direction in Embodiment 2 of this utility model.

[0019] Reference numerals in the attached drawings: 1. Heating box; 1.1. Heating component; 2. Catalytic box; 3. Heat exchange box; 31. Heat exchange space; 32. Shell; 4. Fan; 5. Heat exchange tube; 51. Straight tube; 52. Bend; 6. Air inlet; 7. Air outlet; 8. Pipeline; 9. Flange; 10. Fastener; 11. Air guide hood; 12. Exhaust gas inlet. Detailed Implementation

[0020] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0021] Example 1

[0022] like Figures 1-2As shown, one or more embodiments of this utility model provide an ethylene oxide parser that facilitates waste heat utilization, including a heat exchange box 3, a catalytic box 2, and a heating box 1 stacked sequentially along a first direction. The heating box 1 is equipped with a heating assembly 1.1. The side wall of the heating box 1 has a waste gas inlet 121, which is connected to an ethylene oxide waste gas discharge pipe. The catalytic box 2 contains a catalyst. The heat exchange box 3 includes a shell 32 and a heat exchange tube 5 extending along the first direction. A heat exchange space 31 is formed inside the shell 32. The heat exchange tube 5 is inserted into the heat exchange space 31, with both ends of the heat exchange tube 5 extending out of the shell 32. One end of the heat exchange tube 5 is connected to the catalytic box 2, and the other end is connected to a fan 4. An air inlet 6 and an air outlet 7, which are connected to the heat exchange space 31, are respectively installed at both ends of the shell 32 along a second direction. The first direction and the second direction are perpendicular. The air inlet 6 is used to supply fresh air from the outside, and the air outlet is connected to the end of the heating box 1 away from the catalytic box 2 through a pipe 8.

[0023] Specifically, the heat exchanger 3, catalytic converter 2, and heating chamber 1 here are all square box structures, stacked vertically. That is, the first direction is vertical and the second direction is horizontal.

[0024] Specifically, a cabinet door (not shown in the figure) is installed on the catalyst tank 2. A sealing element is installed between the cabinet door and the body of the catalyst tank 2. The inner cavity of the catalyst tank 2 can be opened and closed through the cabinet door, so that the operator can take out and put in the catalyst through the cabinet door.

[0025] Specifically, the heating box 1, the catalytic box 2, and the heat exchange box 3 are each independently set up and connected to each other by flanges 9 and fasteners 10. The heat exchange tubes 5 are multiple vertical tubes, and the two ends of the heat exchange tubes 5 pass through the upper and lower ends of the heat exchange box 3 respectively. The lower end of the heat exchange box 3 is provided with a wind guide shroud 11, and a fan 4 is installed on the side of the wind guide shroud 11 away from the heat exchange box 3.

[0026] In this embodiment, the heating component 1.1 includes a quartz tube and a resistance wire disposed within the quartz tube. Specifically, the resistance wire is connected to an external power source via a wire, and after being heated, the resistance wire can radiate heat through the quartz tube to the entire inner cavity of the heating chamber 1. In this embodiment, the quartz tubes are evenly distributed within the inner cavity of the heating chamber 1, and the straight sections of the heat exchange tubes 5 are evenly distributed within the housing 32. Specifically, with the quartz tubes evenly distributed within the heating chamber 1 and the heat exchange tubes 5 evenly distributed within the housing 32, it facilitates uniform heating within the heating chamber 1 and ensures sufficient heat exchange between the fresh air and the waste gas with residual heat within the heat exchange tubes 5.

[0027] Specifically, the catalysts mentioned above can be metal oxides (such as Al2O3, TiO2, SiO2-Al2O3) or zeolite molecular sieves. The acidic sites on the surface of these catalysts promote the ring-opening of ethylene oxide, leading to further cracking or recombination to produce small molecule compounds such as ethylene, acetaldehyde, and formaldehyde.

[0028] Working principle: When using this device, the heating component 1.1 and the fan 4 are activated during the desorber's operation. Fresh air enters from the air inlet 6 of the heat exchange box 3, and after being heated by the heat exchange tubes 5 of the heat exchange space 31, it flows out from the air inlet 6 of the heat exchange box 3. Then, the airflow enters the heating box 1 and becomes hot air. In addition, ethylene oxide waste gas generated by the sterilizer in the previous process is introduced through the waste inlet 12. The ethylene oxide waste gas mixes with the hot air and is heated. Finally, the mixed gas enters the catalytic box 2 to catalyze the desorption of ethylene oxide to form harmless gas.

[0029] The waste gas with residual heat discharged from the catalytic converter 2 is discharged through the heat exchange tube 5. At this time, the residual heat heats the heat exchange tube 5 and is finally discharged by the exhaust fan 4. As the temperature of the heat exchange tube 5 of the heat exchanger rises, the fresh air passing through the heat exchange space 31 will carry away the temperature from the heat exchange tube 5, so that the air entering the heating chamber has a certain temperature, which can reduce the power of the electric heater.

[0030] Example 2

[0031] This embodiment has a basically the same structural setup as Embodiment 1, the difference being:

[0032] See Figures 3-4 In this embodiment, the heating box 1 and the catalytic box 2 share a first partition plate, which has a communication port and a valve for opening and closing is provided on the communication port; the catalytic box 2 and the heating box 1 share a second partition plate, and the heat exchange tube 5 is multi-segmented and bent to form multiple straight tubes 51. Adjacent straight sections are connected by bent sections, and the bent section of the heat exchange tube 5 on the side close to the catalytic box 2 passes through the shell 32 and enters the catalytic box 2.

[0033] In this embodiment, both the straight and curved sections have circular cross-sections. The curved section bends along an arc. In other embodiments, the cross-sections of the straight and curved sections can also be square, elliptical, or other shapes, which can be determined by those skilled in the art.

[0034] In this embodiment, the heat exchange tube 5 has a split structure. The heat exchange tube 5 has multiple straight tubes 51 forming straight sections and multiple bent tubes 52 forming bent sections. The two ends of the straight tubes 51 extend out of the shell 32 along the first direction, and adjacent straight tubes 51 are connected by bent tubes.

[0035] Specifically, the straight pipe 51 here is a metal pipe, and the bent pipe 52 is a flexible hose. The two ends of the bent pipe 52 along its bending direction are respectively provided with plugs with sealing rings. The two ends of the bent pipe 52 are respectively inserted into the ends of the two straight pipes 51 to realize the connection between the bent pipe 52 and the straight pipe 51.

[0036] In this embodiment, a lower shell sleeve (not shown in the figure) is also included. The lower shell sleeve is installed at the lower end of the housing 32 and covers the curved tube on the side away from the catalyst box 2.

[0037] Specifically, the lower shell here is a square shell with an open top. The open top of the lower shell is filled and sealed by the lower end of the shell 32.

[0038] In this embodiment, the straight tube 51 can be translated and fixed along the first direction to change the length of the straight tube 51 inserted into the catalyst box 2.

[0039] Specifically, the translation of the straight tube 51 along the first direction is manually driven. To achieve the positioning of the straight tube 51 after translation along the first direction, a locking bolt is provided on the housing 32. The locking bolt passes through the screw hole on the housing 32 and is tightened onto the straight tube 51 in the heat exchange space 31. After the locking bolt tightens the straight tube 51, the straight tube 51 is positioned along the first direction. After loosening the locking bolt, the straight tube 51 can be freely adjusted along the first direction. It can be seen that multiple straight tubes 51 and bent tubes 52 are combined to form a heat exchange tube 5 as a whole. By fixing one or more straight tubes 51, the positioning of the entire heat exchange tube 5 can be achieved.

[0040] By moving the straight pipe 51 along the first direction, the length of the straight pipe 51 extending into the catalytic converter 2 can be changed, thereby allowing some of the exhaust gas in the straight pipe 51 to enter the catalytic converter for heating. This reduces the situation where the heat exchanger 5 is insufficient for heating the fresh air when the outside air temperature is low and the temperature of the heat exchanger 5 drops too quickly.

[0041] The above-described specific embodiments should not be construed as limiting the scope of protection of this utility model. Any alternative improvements or modifications made to the embodiments of this utility model by those skilled in the art shall fall within the scope of protection of this utility model.

[0042] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. An ethylene oxide desorber that facilitates waste heat utilization, characterized in that, The device includes a heat exchange box, a catalytic box, and a heating box arranged in sequence along a first direction. The heating box is equipped with a heating component and has a waste gas inlet on its side wall, which is connected to an ethylene oxide waste gas discharge pipe. The catalytic box contains a catalyst. The heat exchange box includes a shell and heat exchange tubes extending along the first direction. A heat exchange space is formed inside the shell, and the heat exchange tubes are inserted into the heat exchange space. Both ends of the heat exchange tubes extend out of the shell, with one end connected to the catalytic box and the other end equipped with a fan. An air inlet and an air outlet connected to the heat exchange space are respectively installed at both ends of the shell along a second direction. The first and second directions are perpendicular. The air inlet is used to input fresh air from outside, and the air outlet is connected to the end of the heating box away from the catalytic box through a pipe.

2. The ethylene oxide desorber for easy waste heat utilization according to claim 1, characterized in that, The heating box, catalytic box, and heat exchange box are each independently set up and connected to each other by flanges and fasteners. The heat exchange tubes are multiple vertical tubes, with both ends of the heat exchange tubes passing through the upper and lower ends of the heat exchange box, and the lower end of the heat exchange box is equipped with an air guide hood.

3. The ethylene oxide desorber for easy waste heat utilization according to claim 1, characterized in that, The heating box and the catalytic box share a first partition, which has a communication port and a valve for opening and closing. The catalytic box and the heating box share a second partition. The heat exchange tube is multi-segmented and bends to form multiple straight tube segments. Adjacent straight segments are connected by bends. The bends of the heat exchange tube on the side closer to the catalytic box extend out of the shell and into the catalytic box.

4. The ethylene oxide stripper for easy waste heat utilization according to any one of claims 1-3, characterized in that, The heating assembly includes a quartz tube and a resistance wire disposed inside the quartz tube. The quartz tube is evenly distributed in the inner cavity of the heating box, and the straight sections of the heat exchange tube are evenly distributed in the shell.

5. The ethylene oxide desorber for easy waste heat utilization according to claim 3, characterized in that, The heat exchange tube has a split structure, consisting of multiple straight tubes forming straight sections and multiple bent tubes forming bent sections. The two ends of the straight tubes extend out of the shell along the first direction, and adjacent straight tubes are connected by bent tubes.

6. The ethylene oxide desorber for easy waste heat utilization according to claim 5, characterized in that, It also includes a lower shell sleeve, which is installed at the lower end of the housing.

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