Sterilized tail gas treatment device

Abstract

The utility model relates to a sterilized tail gas treatment device which comprises a treatment box, and a cooling chamber, a catalysis chamber and a photolysis chamber are sequentially arranged in the treatment box; a flow guide pipe and a sealed cooling cavity are arranged in the cooling chamber; a noble metal catalyst layer and a transition metal oxide layer are arranged in the catalysis chamber; a photocatalysis plate and an ultraviolet lamp are arranged in the photolysis chamber; the tail gas treatment device is ingenious in design, the independent cooling chamber is arranged in the box body, the flow guide pipe and the sealed cooling cavity are arranged in the cooling chamber, tail gas firstly passes through the cooling chamber along the flow guide pipe, cooling liquid outside the flow guide pipe exchanges heat with the flow guide pipe, and then the tail gas is cooled, so that the tail gas in the catalytic chamber is dry and keeps low temperature; the cooled tail gas enters a catalytic chamber for catalytic reaction, and the purpose of purifying the tail gas is achieved; finally, the tail gas enters a photolysis chamber to deeply degrade organic pollutants, and it is ensured that the tail gas finally reaches the standard and is discharged.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas treatment technology, and more specifically, to a sterilized exhaust gas treatment device. Background Technology

[0002] Existing sterilization equipment (such as pulsed vacuum sterilizers) generates exhaust gases with significant multiphase complex pollution characteristics during high-temperature steam sterilization, specifically: 1) high temperature characteristics, with exhaust temperatures reaching 120-150℃; 2) high humidity environment, with relative humidity exceeding 90% and carrying liquid water mist; 3) complex pollutant composition, including incompletely decomposed organic residues, volatile chemicals, and microbial aerosols with potential biological risks. If these exhaust gases are not effectively treated, they will pose a serious threat to environmental safety and human health. Therefore, exhaust gas treatment equipment has emerged on the market to treat sterilized exhaust gases, including a spray tower for cooling the exhaust gas, a metal catalyst, and ultraviolet lamps for treating microbial aerosols. While the spray tower can quickly reduce the temperature, the high humidity of the gas not only causes hydrolysis and deactivation of the catalyst on the metal catalyst but also causes the surface of the ultraviolet lamp to be covered with water vapor, thus reducing the catalytic effect. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a sterilized exhaust gas treatment device in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a sterilized exhaust gas treatment device, including a treatment box, wherein a cooling chamber, a catalytic chamber and a photolysis chamber are arranged sequentially inside the treatment box; a guide pipe is provided in the cooling chamber, and a sealed cooling cavity surrounds the outside of the guide pipe; the cooling cavity is filled with a coolant to cool the guide pipe; the inlet end of the guide pipe extends out of the treatment box to allow exhaust gas to flow in, and the other end extends into the catalytic chamber; multiple noble metal catalyst layers and transition metal oxide layers are arranged sequentially along the gas outlet direction in the catalytic chamber; both the noble metal catalyst layer and the transition metal oxide layer are provided with vent holes for exhaust gas to pass through; multiple vertically arranged photocatalytic plates and ultraviolet lamps are provided in the photolysis chamber; multiple photocatalytic plates and ultraviolet lamps are arranged side by side and alternately installed on the upper and lower inner sides of the photolysis chamber to form a serpentine airflow channel inside the photolysis chamber; the tail end of the airflow channel is connected to an exhaust pipe.

[0005] The exhaust gas treatment device of this utility model is provided with an air pump or fan at the air inlet end of the guide pipe to accelerate the flow of exhaust gas along its length toward the catalytic chamber.

[0006] In the exhaust gas treatment device of this utility model, a plurality of noble metal catalyst layers and a plurality of transition metal oxide layers are sequentially and alternately distributed.

[0007] In the exhaust gas treatment device of this utility model, the guide pipe has a spiral structure;

[0008] In the exhaust gas treatment device of this utility model, the diameter of the vent hole gradually decreases from front to back;

[0009] In the exhaust gas treatment device of this utility model, the vent holes of the noble metal catalyst layer and the vent holes of the transition metal oxide layer are arranged alternately.

[0010] In the exhaust gas treatment device of this utility model, the noble metal catalyst layer is made of Pt-Pd or Al2O3; the transition metal oxide layer is made of MnO2-CeO2.

[0011] In the exhaust gas treatment device of this utility model, the photocatalytic plate is composed of a TiO2 coating and a mirror aluminum substrate.

[0012] The beneficial effects of this utility model are as follows: The exhaust gas treatment device is ingeniously designed. By setting up a separate cooling chamber inside the box, and setting up a guide pipe and a sealed cooling cavity inside the cooling chamber, the exhaust gas first passes through the cooling chamber along the guide pipe. The coolant outside the guide pipe exchanges heat with the guide pipe, thereby cooling the exhaust gas, so that the exhaust gas in the catalytic chamber is both dry and kept at a low temperature. The cooled exhaust gas enters the catalytic chamber and passes through multiple layers of noble metal catalyst and multiple layers of transition metal oxide in sequence, which can increase the catalytic reaction time and catalytic area, thereby improving the conversion rate and achieving the purpose of purifying the exhaust gas. Finally, the exhaust gas enters the photolysis chamber. Under the irradiation of ultraviolet light, the photocatalytic plate generates a strong oxidizing reaction that can deeply degrade trace organic pollutants that are difficult to be oxidized by conventional catalysis, and can even kill residual microorganisms, ensuring that the exhaust gas finally meets the emission standards. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a sterilized exhaust gas treatment device according to a preferred embodiment of the present invention. Detailed Implementation

[0015] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0016] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0017] "Multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0018] Furthermore, the terms indicating orientation, such as "up, down, front, back, left, right, upper end, lower end, longitudinal," etc., are all based on the posture and position of the device or equipment described in this solution during normal use.

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0020] A preferred embodiment of this utility model provides a sterilized exhaust gas treatment device, such as... Figure 1As shown, the system includes a processing chamber 10, within which a cooling chamber 11, a catalytic chamber 12, and a photolysis chamber 13 are sequentially arranged. The cooling chamber 11 contains a guide pipe 111 and a sealed cooling cavity surrounding the guide pipe 111. The cooling cavity is filled with a coolant 112, such as water or ethylene glycol solution, to cool the guide pipe 111. The inlet end 113 of the guide pipe 111 extends outside the processing chamber 10 to allow exhaust gas to flow in, while the other end extends into and communicates with the catalytic chamber 12. The catalytic chamber 12 is directly connected to the photolysis chamber 13. The catalytic chamber 12 contains a flow path along the exhaust... Multiple noble metal catalyst layers 121 and transition metal oxide layers 122 are sequentially arranged in the gas direction. In this embodiment, the noble metal catalyst layer 121 can be made of Pt-Pd or Al2O3 in the prior art, which has a high catalytic oxidation ability for organic matter and NOx, converting them into harmless substances such as CO2, H2O, and N2. The transition metal oxide layer 122 can be made of MnO2-CeO2 in the prior art, which provides a broader or supplementary catalytic function for specific pollutants or as an auxiliary agent / carrier.

[0021] Furthermore, both the noble metal catalyst layer 121 and the transition metal oxide layer 122 are provided with ventilation holes 123 for the exhaust gas to pass through; the photolysis chamber 13 is provided with multiple vertically arranged photocatalytic plates 131 and ultraviolet lamps 132; in one embodiment, the photocatalytic plate 131 is composed of a TiO2 coating and a mirror aluminum substrate. Under ultraviolet light irradiation, the TiO2 coating can generate highly oxidizing hydroxyl radicals, which can deeply degrade trace organic pollutants that are difficult to oxidize by conventional catalysis; the mirror aluminum substrate has high reflectivity. When ultraviolet light irradiates the photocatalytic plate, the light that is not directly absorbed by TiO2 will be reflected by the mirror aluminum plate, increasing the number of reflections of light inside the TiO2 coating, thereby improving the light utilization rate and overall catalytic efficiency. Multiple photocatalytic plates 131 and ultraviolet lamps 132 are installed alternately on the upper and lower inner sides of the photolysis chamber 13, forming a serpentine airflow channel 133 inside the photolysis chamber 13. This increases the residence time of exhaust gas in the photolysis chamber and improves the efficiency of the photocatalytic reaction. The tail end of the airflow channel 132 is connected to an exhaust pipe.

[0022] This exhaust gas treatment device is ingeniously designed. It features a separate cooling chamber within the casing, containing a guide pipe and a sealed cooling cavity. The exhaust gas first passes through the cooling chamber along the guide pipe, where the coolant outside the pipe exchanges heat with it, thus cooling the exhaust gas. This ensures the exhaust gas in the catalytic chamber is both dry and kept at a low temperature. The cooled exhaust gas then enters the catalytic chamber, passing sequentially through multiple layers of noble metal catalysts and multiple layers of transition metal oxides. This increases the catalytic reaction time and catalytic area, thereby improving the conversion rate and achieving the goal of purifying the exhaust gas. Finally, the exhaust gas enters the photolysis chamber, where the photocatalytic plate generates a strong oxidizing reaction under ultraviolet light, deeply degrading trace organic pollutants that are difficult to oxidize through conventional catalysis. It can even kill residual microorganisms, ensuring the exhaust gas ultimately meets emission standards.

[0023] To ensure that the exhaust gas is continuously and stably drawn in and flows along the guide pipe to the catalytic chamber and photocatalytic chamber, the air inlet 113 of the guide pipe 111 is equipped with an air pump 114 or fan to accelerate the flow of the exhaust gas along its length toward the catalytic chamber 12; the air pump 114 or fan is existing technology. By adjusting the speed / power of the air pump or fan, the exhaust gas flow rate entering the treatment device can be easily controlled to adapt to different operating conditions or treatment requirements.

[0024] Furthermore, multiple noble metal catalyst layers 121 and multiple transition metal oxide layers 122 are sequentially and alternately distributed. The noble metal catalysts (which can also be platinum, palladium, or rhodium as used in the prior art) typically exhibit high activity for specific types of organic matter or reducing pollutants such as CO. The transition metal oxides (which can also be copper oxide, zinc oxide, or iron oxide as used in the prior art) may have good removal effects on other types of organic matter or oxidizing pollutants such as NOx, or may function as co-catalysts or supports.

[0025] After passing through a layer of precious metal catalyst, the exhaust gas immediately enters a layer of transition metal oxide, and then passes through the precious metal catalyst and transition metal oxide layer repeatedly. This can more effectively remove different types of pollutants in a synergistic manner, or perform secondary catalysis on pollutants that were not completely converted in the previous layer, thereby improving the overall conversion rate and removal rate, increasing the contact interface between the exhaust gas and the catalyst, and extending the effective reaction time of the exhaust gas in the catalytic chamber.

[0026] In this embodiment, the guide tube 111 is made of copper or aluminum, which has a very high thermal conductivity, and has a diameter of 10 cm. Furthermore, the guide tube 111 has a spiral structure, which greatly increases the outer surface area of ​​the guide tube. According to the principle of heat transfer, the larger the heat exchange area, the higher the heat exchange efficiency. This means that when the exhaust gas flows inside the guide tube, it can more effectively transfer heat to the coolant outside the tube. Optionally, the number of spiral turns of the guide tube is 5-8 turns.

[0027] Furthermore, the vent 123 has a gradually decreasing diameter from front to back, for example, a diameter of 2 mm in the front section and a diameter that gradually decreases to 1 mm in the rear section. The larger diameter in the front section (e.g., 2 mm) allows the exhaust gas to enter the catalyst layer relatively easily. As the exhaust gas moves downstream, the diameter gradually decreases (e.g., to 1 mm), which gradually increases the resistance to gas flow recirculation. This gradually increasing resistance also helps to guide and distribute the gas flow more evenly throughout the catalyst layer or transition metal oxide layer.

[0028] Furthermore, the vent holes 123 of the noble metal catalyst layer 121 and the vent holes 123 of the transition metal oxide layer 122 are staggered, so that the path of the exhaust gas as it passes through the catalyst chamber will change continuously, and the airflow needs to pass through the pores at different positions in different types of catalyst layers; this further enhances the uniformity of the contact between the exhaust gas and the two catalysts (noble metal and transition metal oxide), and avoids the airflow from being concentrated on certain specific paths, thereby significantly improving the purification efficiency and stability of the exhaust gas treatment device.

[0029] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A device for treating sterilized exhaust gas, comprising a treatment chamber, characterized in that, The processing chamber contains a cooling chamber, a catalytic chamber, and a photolysis chamber arranged sequentially. The cooling chamber contains a guide pipe and a sealed cooling cavity surrounding the guide pipe. The cooling cavity is filled with a coolant to cool the guide pipe. The inlet end of the guide pipe extends outside the processing chamber to allow exhaust gas to flow in, while the other end extends into the catalytic chamber. Multiple noble metal catalyst layers and transition metal oxide layers are arranged sequentially along the exhaust direction within the catalytic chamber. Both the noble metal catalyst layers and the transition metal oxide layers have vents for exhaust gas to pass through. The photolysis chamber contains multiple vertically arranged photocatalytic plates and ultraviolet lamps. These photocatalytic plates and ultraviolet lamps are alternately installed side-by-side on the upper and lower inner sides of the photolysis chamber, forming a serpentine airflow channel within the chamber. The tail end of the airflow channel is connected to an exhaust pipe.

2. The exhaust gas treatment device after sterilization according to claim 1, characterized in that, The air inlet end of the guide pipe is equipped with an air pump or fan to accelerate the flow of exhaust gas along its length toward the catalytic chamber.

3. The sterilized exhaust gas treatment device according to claim 1 or 2, characterized in that, Multiple noble metal catalyst layers and multiple transition metal oxide layers are sequentially and alternately distributed.

4. The sterilized exhaust gas treatment device according to claim 1 or 2, characterized in that, The guide tube has a spiral structure.

5. The exhaust gas treatment device after sterilization according to claim 4, characterized in that, The diameter of the vent gradually decreases from front to back.

6. The exhaust gas treatment device after sterilization according to claim 5, characterized in that, The vent holes of the noble metal catalyst layer and the vent holes of the transition metal oxide layer are arranged alternately.

7. The sterilized exhaust gas treatment device according to any one of claims 1, 5, and 6, characterized in that, The noble metal catalyst layer is made of Pt-Pd or Al2O3; the transition metal oxide layer is made of MnO2-CeO2.

8. The exhaust gas treatment device after sterilization according to claim 7, characterized in that, The photocatalytic plate is composed of a TiO2 coating and a mirror-finished aluminum substrate.

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