An ozone degradation device based on high-speed airflow and catalyst gas-solid coupling

Abstract

The present invention provides an ozone degradation device based on high-speed airflow and catalyst gas-solid coupling, comprising: an air inlet, which is a pipeline for inputting airflow; an annular reaction chamber, which is a closed space for ozone decomposition, and a catalyst for decomposing ozone is placed inside, comprising an inlet connected to the air inlet, and an annular guide ramp extending along the inlet, and an outlet for discharging purified airflow is arranged on the guide ramp; a shaking device, which is used to prevent the catalyst from being discharged from the outlet, comprising a support structure installed outside the outlet, and a filter screen mounted on the support structure; an eccentric wheel connected to the support structure, and a vibration motor that drives the eccentric wheel to shake off the catalyst adhering to the filter screen through a vibration motor. The present invention uses a high-power fan to make the ozone airflow enter the annular reaction chamber at high speed, and uses the effect of high-speed impact of the airflow to reduce the activation energy of ozone and increase the contact rate between the catalyst and the ozone airflow, so as to achieve low-cost and high-efficiency degradation of ozone.

Description

Technical Field

[0001] The invention relates to the field of ozone decomposition, and in particular to an ozone degradation device based on gas-solid coupling of high-speed airflow and catalyst. Background Art

[0002] The high-altitude ozone layer is the protective umbrella of the earth, but the ozone in the troposphere is extremely harmful to the earth's environment and human health. In the past 20-30 years, the global ozone pollution concentration has increased significantly, and the increase rate in East Asia is faster and much higher than other parts of the world. Therefore, efficient ozone degradation is an issue that needs to be solved urgently.

[0003] At present, compared with other ozone methods such as adsorption and absorption, catalytic decomposition of ozone has become the mainstream research direction in ozone degradation methods due to its advantages of stability and safety. However, the current catalytic method mainly uses catalysts fixed on static structures to achieve ozone catalytic decomposition reactions, resulting in high costs, low efficiency, and reduced versatility. Summary of the invention

[0004] The purpose of the invention is to provide an ozone degradation device based on high-speed airflow and catalyst gas-solid coupling.

[0005] Specifically, the present invention provides an ozone degradation device based on high-speed airflow and catalyst gas-solid coupling, comprising:

[0006] The air inlet duct is a pipe for inputting air flow;

[0007] The annular reaction chamber is a closed space for ozone decomposition, in which a catalyst for decomposing ozone is placed, and includes an inlet connected to the air inlet duct, and an annular guide ramp extending along the inlet, and an outlet for discharging purified airflow is arranged on the guide ramp;

[0008] The shaking device is used to prevent the catalyst from being discharged from the outlet, including a supporting structure installed outside the outlet, a filter screen mounted on the supporting structure; an eccentric wheel connected to the supporting structure, and a vibration motor that drives the eccentric wheel to shake off the catalyst adhering to the filter screen.

[0009] The present invention uses a high-power motor to make the ozone gas flow enter the annular reaction chamber at high speed, and uses the high-speed impact of the gas flow to reduce the ozone activation energy and increase the contact rate between the catalyst and the ozone gas flow, thereby achieving low-cost and high-efficiency ozone degradation. The present invention can effectively lower the threshold of ozone degradation and form a new equipment for low-cost and high-efficiency ozone degradation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic structural diagram of an ozone degradation device according to one embodiment of the present invention. DETAILED DESCRIPTION

[0011] The specific structure and implementation process of this solution are described in detail below through specific embodiments and drawings.

[0012] like Figure 1 As shown, in one embodiment of the present invention, an ozone degradation device based on gas-solid coupling of high-speed airflow and catalyst is disclosed, comprising: an air inlet duct 1, an annular reaction chamber 2, and a filtering device 3.

[0013] The air inlet 1 serves as an input conduit for air flow.

[0014] The annular reaction chamber 2 is a closed space that provides a space for decomposing ozone, and a catalyst for decomposing ozone is placed inside. Its structure includes an inlet 11 connected to the air inlet 1, and an annular guide ramp 12 extending along the inlet 11, and an outlet 13 for discharging the decomposed air is arranged on the guide ramp 12; the annular reaction chamber 2 is generally placed vertically, that is, the inlet 11 is at the bottom and the outlet 13 is at the top.

[0015] The filter device 3 is used to prevent the catalyst from being discharged from the outlet 13, and includes a support structure 31 installed outside the outlet 13, a filter screen 32 mounted on the support structure 31, and a vibration motor 33 in contact with the support structure 31 through an eccentric wheel, and the vibration motor is used to regularly shake off the catalyst attached to the filter screen; the purified air is discharged from the outlet end 34. The support structure 31 can be any structure that does not affect ventilation and can install the filter screen at the outlet, such as a cylinder with multiple outlet holes or air outlet slots, the filter screen is installed in the cylindrical tube, and the cylindrical tube can also serve as a fixed base for the vibration motor 33.

[0016] During operation, the ozone air input from the input pipe is input into the annular reaction chamber 2 through the air inlet pipe 1. The ozone air entering the annular reaction chamber 2 moves along the guide ramp 12 and is fully mixed with the catalyst inside during the movement. The ozone components in the air are decomposed, and the remaining air is discharged from the upper outlet 13 through the filter 32. During the air discharge process, the catalyst mixed in the air is blocked by the filter 32 and falls back into the annular reaction chamber 2 below to continue to react with the ozone air. If some catalyst adheres to the filter 32, the vibration motor 33 will drive the eccentric wheel through the drive shaft to intermittently shake the support structure 31 on which the filter 32 is installed, so that the catalyst adhered to the filter 32 falls off. The vibration motor 33 can be installed at the outlet 34 of the support structure 31.

[0017] In this embodiment, the annular reaction chamber 2 adopts an annular design to prolong the residence time of the airflow in the reaction zone, thereby increasing the contact rate between the ozone air and the catalyst and improving the degradation efficiency. The filter can prevent the catalyst from detaching, so that the catalyst can be reused to the maximum extent.

[0018] The catalyst in this embodiment is selected from metal oxides with lower cost, such as Cu2O, etc., wherein the relationship between the catalyst size and the filter mesh number is shown in Table 1.

[0019] Table 1 Correspondence between catalyst size and filter mesh number

[0020]

[0021]

[0022] In order to facilitate the production of negative pressure and positive pressure areas, and to achieve the entry of external airflow and the removal after purification, a variable frequency fan 14 can be installed in the air inlet 1. The variable frequency fan 14 is mainly designed for ozone concentration to achieve low-cost and high-efficiency degradation. For example, when the ozone concentration is 1ppm, 150g of catalyst is added, the outlet ozone concentration is detected for 3-5 hours, and the average value of 1 hour is taken. If the degradation efficiency is to reach more than 90%, considering the wind resistance and other issues, the air volume of the variable frequency fan 14 is preferably 600m 3 / h~1000m 3 / h is more appropriate.

[0023] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. An ozone degradation device based on high-speed airflow and catalyst gas-solid coupling, characterized in that: include: The air inlet duct is a pipe for inputting air flow; The annular reaction chamber is a closed space for ozone decomposition, in which a catalyst for decomposing ozone is placed, and includes an inlet connected to the air inlet duct, and an annular guide ramp extending along the inlet, and an outlet for discharging purified airflow is arranged on the guide ramp; A shaking device, used to prevent the catalyst from being discharged from the outlet, comprising a support structure installed outside the outlet and a filter screen mounted on the support structure; The eccentric wheel connected to the supporting structure drives a vibration motor which shakes off the catalyst adhering to the filter.

2. The ozone degradation device according to claim 1, characterized in that: A variable frequency fan is installed in the air inlet duct.

3. The ozone degradation device according to claim 2, characterized in that: The air volume of the variable frequency fan is 240m 3 / h~1000m 3 / h.

4. The ozone degradation device according to claim 3, characterized in that: The wind speed of the air inlet duct is between 10m / s and 30m / s.

5. The ozone degradation device according to claim 1, characterized in that: When the size of the catalyst is between 1.5 and 3 μm, the mesh number of the filter is 10,000; when the size of the catalyst is between 3 and 6 μm, the mesh number of the filter is 5,000; when the size of the catalyst is between 7 and 10 μm, the mesh number of the filter is 2,000.

6. The ozone degradation device according to claim 1, characterized in that: The vibration motor is installed at the outlet end of the supporting structure.

7. The ozone degradation device according to claim 1, characterized in that: The catalyst is a metal oxide.

8. The ozone degradation device according to claim 7, characterized in that: The catalyst is Cu2O.

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