Gasification hydrogen peroxide supply device
By introducing a descaling pipeline along the hydrogen peroxide evaporation path and using acetic acid as a descaling agent, the problem of scaling in the evaporator was solved, achieving efficient removal of dirt, maintaining equipment stability and production continuity, and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-03-03
AI Technical Summary
During the hydrogen peroxide vaporization process, scaling on the inner wall of the evaporator increases gas flow resistance, reduces heat transfer efficiency, accelerates equipment aging, and causes production instability. Existing technologies require regular disassembly and cleaning, which increases maintenance costs and production interruptions.
A descaling pipeline is introduced along the hydrogen peroxide evaporation path, using acetic acid as the descaling agent. It is shared with the sterile hot air for vaporization through the hot gas input end of the evaporator. Combined with the design of the reflux valve and the liquid storage tank, it is ensured that the descaling agent comes into contact with the dirt and flows back to the liquid storage tank by gravity, avoiding residue.
It effectively removes dirt from the evaporator, maintains heat transfer efficiency, ensures vaporization quality, reduces equipment damage, lowers maintenance costs, and avoids production interruptions.
Smart Images
Figure CN223959190U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a vaporized hydrogen peroxide supply device. Background Technology
[0002] Hydrogen peroxide is widely used in container sterilization as an important sterilizing agent. It is typically applied via vaporization, sprayed as a gas onto the surface of the object to be sterilized. For example, when gaseous hydrogen peroxide encounters the surface of a bottle at room temperature, it condenses into a thin layer, achieving optimal sterilization. However, during vaporization, a noticeable white or grayish-white deposit forms on the inner wall of the evaporator (heating vaporization device). This scale is usually unevenly distributed, denser in some areas and sparser in others. Over time and as scaling intensifies, the scale layer thickens, evolving from thin flakes to lumps or nodules. Because the scale reduces the pipe diameter, resistance to gas flow increases during vaporization. This manifests as decreased gas velocity, increased pressure drop, and potentially unstable airflow, even forming eddies or obstructed flow in localized areas. The scale also affects the heat transfer efficiency of the evaporator, leading to increased surface temperature of the heating elements. The temperature distribution in the heating zone of the evaporator is uneven, with areas contaminated with dirt reaching significantly higher temperatures than other areas. Furthermore, to achieve the desired vaporization effect, the heating power needs to be continuously increased, but the vaporization efficiency does not improve accordingly.
[0003] Scale can adhere to the surface of heating elements, increasing thermal resistance and reducing heat transfer efficiency. This means the equipment needs to consume more energy to achieve the same vaporization effect, leading to energy waste. Simultaneously, scale can affect the uniformity of gas distribution in the vaporization unit, reducing vaporization efficiency and impacting the stability of the entire production process and product quality. Uneven scale can cause localized overheating, degrading the mechanical properties of equipment materials and accelerating aging and damage. Furthermore, the accumulation of scale can corrode the inner walls of the equipment, further weakening its structural strength and shortening its lifespan. If scale detaches and falls into the bottle during hydrogen peroxide vaporization, it can severely impact the hygiene of the product.
[0004] Current technology requires the evaporator to be disassembled and cleaned periodically, which not only increases the workload and maintenance costs for maintenance personnel, but also leads to long-term production interruptions and economic losses. Summary of the Invention
[0005] The technical problem this invention aims to solve is how to remove dirt from the inside of an evaporator. This results in a vaporized hydrogen peroxide supply device.
[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: The vaporized hydrogen peroxide supply device includes an evaporator, a hydrogen peroxide supply pipeline, a sterile air supply pipeline for atomization, and a sterile hot air supply pipeline for vaporization. The evaporator is provided with a mist input end and a hot air input end. The hydrogen peroxide supply pipeline and the sterile air supply pipeline for atomization are connected to the mist input end of the evaporator. The sterile hot air supply pipeline for vaporization is connected to the hot air input end of the evaporator. The vaporized hydrogen peroxide supply device also includes a descaling pipeline, which includes an inlet valve I, a reflux valve, a proportional valve, a pump, an inlet valve II, and a storage tank. The pump is connected to an external descaling agent storage container through a delivery pipe. The pump is connected to a proportional valve via a delivery pipe. The proportional valve is connected to inlet valve I via a delivery pipe. Inlet valve I is connected to the hot gas input end of the evaporator via a delivery pipe. One end of the reflux valve is open to the atmosphere, and the other end of the reflux valve is connected to the delivery pipe between inlet valve I and the proportional valve via a delivery pipe. The inlet of the storage tank is connected to inlet valve II via a delivery pipe. Inlet valve II is connected to the delivery pipe between the pump and the proportional valve via a delivery pipe. Under negative pressure, the storage tank is connected to the delivery pipe between the pump and the proportional valve via inlet valve II. The height of the reflux valve is greater than the height of the hot gas input end of the evaporator, and the height of the hot gas input end of the evaporator is greater than the height of the storage tank.
[0007] The technical solution is designed to deliver the descaling agent along the path of hydrogen peroxide vaporization. To this end, a descaling pipeline is added to the hydrogen peroxide vaporization supply unit, and this pipeline shares the same hot air input end of the evaporator as the sterile hot air supply pipeline for vaporization. This ensures that the delivery path of the descaling agent coincides with the area where the hydrogen peroxide vaporizes. Since the scale buildup occurs within the area where the hydrogen peroxide vaporizes, this design guarantees that the descaling agent comes into full contact with all the scale.
[0008] The descaling agent differs from hydrogen peroxide; it is acetic acid. During the vaporization of hydrogen peroxide, the descaling agent must not appear inside the evaporator. However, descaling agent remains in the pipeline during the descaling stage, necessitating that it be removed from the vaporization path before hydrogen peroxide evaporation. Therefore, this design incorporates specific height considerations: the height of the reflux valve is greater than the height of the hot gas inlet of the evaporator, and the height of the hot gas inlet of the evaporator is greater than the height of the storage tank. This feature ensures that gravity allows the descaling agent to flow into the storage tank. Thus, any remaining descaling agent in the descaling pipeline flows into the storage tank, ensuring that no descaling agent remains in the pipeline except in the storage tank, keeping the descaling agent away from the evaporator during the hydrogen peroxide evaporation stage.
[0009] The function of the reflux valve is to connect the inside of the descaling pipeline to the atmosphere, allowing any remaining descaling agent in the pipeline to flow into the storage tank. The reflux valve is connected to the delivery pipe between the proportional valve and inlet valve I at a position offset from the end of the delivery pipe. When inlet valve I and the pump are both closed, and the reflux valve and the proportional valve are both open, a flow path for the descaling agent is formed on the delivery pipe between the reflux valve, the proportional valve, and the storage tank. However, there is a dead flow angle at the end of the delivery pipe between inlet valve I and the reflux valve. To reduce this dead flow angle near inlet valve I, the distance from the reflux valve to inlet valve I is less than the distance from the reflux valve to the proportional valve.
[0010] To reduce dead zones in the pipeline near the pump, the distance from the storage tank to the pump is less than the distance from the proportional valve to the pump.
[0011] This utility model adopts the above-mentioned technical solution: covering the descaling agent delivery path on the hydrogen peroxide evaporation path to ensure that the descaling agent comes into contact with all the dirt, removes the dirt along the original vaporized hydrogen peroxide generation path, maintains the heat transfer efficiency of the evaporator, and ensures the vaporization quality of the entire vaporized hydrogen peroxide supply device. Attached Figure Description
[0012] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0013] Figure 1 This is a schematic diagram of the structure of a vaporized hydrogen peroxide supply device according to the present invention. Detailed Implementation
[0014] like Figure 1 As shown, the vaporized hydrogen peroxide supply device includes an evaporator 1, a hydrogen peroxide supply pipeline 2, a sterile air supply pipeline for atomization 3, a sterile hot air supply pipeline for vaporization 4, and a descaling pipeline 5.
[0015] Evaporator 1 is equipped with a mist inlet and a hot air inlet. The mist inlet is used to input atomized hydrogen peroxide, and the hot air inlet is used to inject sterile hot air into the atomized hydrogen peroxide. Hydrogen peroxide supply line 2 and sterile air supply line 3 for atomization are connected to the mist inlet of evaporator 1, while sterile hot air supply line 4 for vaporization and descaling line 5 are both connected to the hot air inlet of evaporator 1.
[0016] The descaling pipeline 5 includes an inlet valve I6, a reflux valve 7, a proportional valve 8, a pump 9, an inlet valve II10, and a storage tank 11. Pump 9 is connected to an external descaling agent storage container via a delivery pipe. Pump 9 is also connected to proportional valve 8 via a delivery pipe. Proportional valve 8 is connected to inlet valve I6 via a delivery pipe. Inlet valve I6 is connected to the hot gas input terminal of evaporator 1 via a delivery pipe. One end of reflux valve 7 is open to the atmosphere, and the other end is connected to the delivery pipe between inlet valve I6 and proportional valve 8 via a delivery pipe. The distance from reflux valve 7 to inlet valve I6 is less than the distance from reflux valve 7 to proportional valve 8. The inlet of storage tank 11 is connected to inlet valve II10 via a delivery pipe. Inlet valve II10 is connected to the delivery pipe between pump 9 and proportional valve 8 via a delivery pipe. The distance from storage tank 11 to pump 9 is less than the distance from proportional valve 8 to pump 9. Under negative pressure, the liquid storage tank 11 is connected to the liquid delivery pipe between the pump 9 and the proportional valve 8 through the liquid inlet valve II 10. The height of the reflux valve 7 is greater than the height of the hot gas input end of the evaporator 1, and the height of the hot gas input end of the evaporator 1 is greater than the height of the liquid storage tank 11.
[0017] The function of the storage tank 11 is not limited to being a component of the descaling pipeline 5. It can be used to supply descaling agent to other functional devices, such as continuously supplying descaling agent to the liquid seal machine during the process of increasing the vaporized hydrogen peroxide supply in the vaporized hydrogen peroxide supply device. Therefore, the negative pressure state inside it is naturally formed by its operational needs. Of course, the storage tank 11 can also serve the descaling pipeline 5 independently, and its negative pressure can be generated by a known vacuuming device. The storage tank 11 in this embodiment is an example of the former structure.
[0018] Initially, inlet valve I6, reflux valve 7, proportional valve 8, pump 9, and inlet valve II10 are all closed. When evaporator 1 stops vaporizing hydrogen peroxide, hydrogen peroxide supply line 2, sterile air supply line 3 for atomization, and sterile hot air supply line 4 for vaporization are all shut off, preventing material from being supplied to evaporator 1. Before entering the descaling operation, inlet valve I6 and proportional valve 8 are opened first, followed by pump 9. The descaling agent flows into evaporator 1 through the pipelines. Scale formation occurs in the area where hydrogen peroxide vaporizes, and the flow path of the descaling agent covers this area, thus achieving the descaling operation. When descaling is complete, inlet valve I6 and pump 9 are closed, and reflux valve 7 and inlet valve II10 are opened. The negative pressure in storage tank 11 causes the descaling agent in the delivery line to be squeezed by the external atmosphere. Under the combined effect of the descaling agent's own weight and pressure difference, it enters storage tank 11, finally returning to the initial state. During the descaling operation, if the storage tank 11 needs to be replenished with descaling agent, the inlet valve II 10 can be opened for replenishment. At this time, the return valve 7 is closed, and the descaling agent delivered by the pump 9 will flow to the evaporator 1 and the storage tank 11.
Claims
1. A gasified hydrogen peroxide supply device comprising an evaporator (1), a hydrogen peroxide supply line (2), an atomizing sterile air supply line (3), a gasifying sterile hot air supply line (4), the evaporator (1) being provided with a mist input end and a hot gas input end, the hydrogen peroxide supply line (2), the atomizing sterile air supply line (3) being connected to the mist input end of the evaporator (1), the gasifying sterile hot air supply line (4) being connected to the hot gas input end of the evaporator (1), characterized in that: The gasification hydrogen peroxide supply device further comprises a descaling pipeline (5), the descaling pipeline (5) comprising a liquid inlet valve I (6), a backflow valve (7), a proportional valve (8), a pump (9), a liquid inlet valve II (10), a liquid storage tank (11), the pump (9) being connected with an external descaling agent storage container through a liquid conveying pipe, the pump (9) being connected with the proportional valve (8) through a liquid conveying pipe, the proportional valve (8) being connected with the liquid inlet valve I (6) through a liquid conveying pipe, the liquid inlet valve I (6) being connected with a hot gas input end of the evaporator (1) through a liquid conveying pipe, one end of the backflow valve (7) being communicated with the atmosphere, the other end of the backflow valve (7) being connected with the liquid conveying pipe between the liquid inlet valve I (6) and the proportional valve (8), the liquid inlet of the liquid storage tank (11) being connected with the liquid inlet valve II (10) through a liquid conveying pipe, the liquid inlet valve II (10) being connected with the liquid conveying pipe between the pump (9) and the proportional valve (8) through a liquid conveying pipe, the liquid storage tank (11) being communicated with the liquid conveying pipe between the pump (9) and the proportional valve (8) through the liquid inlet valve II (10) under a negative pressure state, the height of the backflow valve (7) being greater than the height of the hot gas input end of the evaporator (1), and the height of the hot gas input end of the evaporator (1) being greater than the height of the liquid storage tank (11).
2. The hydrogen peroxide gas supply device according to claim 1, wherein: The distance from the backflow valve (7) to the liquid inlet valve I (6) is less than the distance from the backflow valve (7) to the proportional valve (8).
3. The hydrogen peroxide gas supply device according to claim 1, wherein: The distance from the liquid storage tank (11) to the pump (9) is less than the distance from the proportional valve (8) to the pump (9).