Industrial organic waste gas VOCs purification equipment
By using the combination of front-stage ozone catalysts and rear-stage low-temperature plasma reactors and activated carbon in industrial waste gas purification equipment, the limitations of single-stage VOCs treatment in the prior art are solved, and multi-stage purification is realized to ensure emission standards and improve processing efficiency.
Patent Information
- Application Number
- CN202421177568.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-28
AI Technical Summary
There are single-stage restrictions on the treatment of volatile organic compounds (VOCs) in existing industrial waste gas purification equipment, which is difficult to meet the requirements of increasing emission standards and cannot fully meet the emission standards.
An industrial organic waste gas VOCs purification equipment was designed, and a combination of front and rear stage purification devices were adopted. The front stage used ozone catalyst and low-temperature plasma reactor, and the back stage used low-temperature plasma reactor and activated carbon, which ensured by multi-stage treatment. VOCs meet emission standards.
It realizes flexible treatment of a variety of VOCs exhaust gases, ensures that the purified exhaust gas meets emission standards, improves treatment efficiency and adaptability, and extends the service life of catalysts and activated carbon.
Smart Images
Figure CN222342464U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waste gas treatment, in particular to industrial organic waste gas VOCs purification equipment. Background Art
[0002] Volatile organic compounds (VOCs) are a type of pollutant that is very common in indoor and outdoor environments. They mainly include hydrocarbons (alkanes, aromatics, alkenes), and hydrocarbon derivatives (halogenated hydrocarbons, aldehydes, ketones, alcohols, and structures containing N / S atoms).
[0003] VOCs are substances that can directly harm the human body and affect human health. They not only stimulate the organs of the human vision, smell and respiratory system, but also damage the heart, lungs and nervous system. In addition, VOCs can react with other pollutants in the atmosphere, leading to local or global environmental problems. For example, under the action of sunlight (ultraviolet light), VOCs can react with NOx to form fine suspended particles and photochemical smog, which are harmful to human health and reduce crop yields.
[0004] VOCs mainly come from industrial waste gas emissions. As people's requirements for the quality of living environment increase, existing industrial waste gas needs to be purified before VOCs are discharged. Currently, the purification treatment of VOCs is single-stage, and there are volatile organic compounds that cannot fully meet the emission standards. The treatment limit of purification equipment is difficult to adapt to the ever-increasing emission standards. Utility Model Content
[0005] In order to solve the above technical problems, the utility model designs an industrial organic waste gas VOCs purification equipment.
[0006] The utility model adopts the following technical solutions:
[0007] An industrial organic waste gas VOCs purification device comprises a front-end purification device and a rear-end purification device, wherein a middle-section connecting pipeline is connected between a tail-end air outlet of the front-end purification device and an inlet of the rear-end purification device, a middle-section purification outlet is provided in the middle-section connecting pipeline, a rear-end purification outlet is provided at the tail end of the rear-end purification device, a purification inlet is provided at the bottom inlet end of the front-end purification device, an ozone inlet is provided at the bottom inlet section of the front-end purification device, the ozone inlet is connected to an ozone generator, an ozone catalyst is installed in the middle section of the front-end purification device, a VOCs detector is provided at the tail-end air outlet of the front-end purification device, electric control valves are respectively installed at the middle-section connecting pipeline and the middle-section purification outlet, a plurality of low-temperature plasma reactors are installed in the middle section of the rear-end purification device, catalysts and activated carbon are filled in the low-temperature plasma reactors, and the low-temperature plasma reactors are connected to a high-frequency and high-voltage power supply.
[0008] Preferably, the low-temperature plasma reactor is a dual dielectric barrier discharge plasma reactor, and each low-temperature plasma reactor is evenly spaced and arranged in parallel in the shell along the airflow direction. The low-temperature plasma reactor integrates low-temperature plasma technology, adsorption technology and catalytic technology. The addition of activated carbon to adsorb increases the residence time of VOCs in the purification device, and the addition of catalyst to catalyze improves the carbon balance of the degradation process. At the same time, the catalyst carrier also has an adsorption effect, which also has a certain effect on increasing the residence time of VOCs. The large amount of active substances generated by the dual dielectric barrier discharge can react with VOCs in the gas and pollutants adsorbed on the surface of activated carbon and catalyst. While purifying VOCs, it can also achieve the purpose of regenerating catalysts and activated carbon.
[0009] Preferably, the shells of the front-stage purification device and the rear-stage purification device are respectively formed by an inlet horn that is small at the front and large at the rear, a middle section, and an outlet horn that is large at the front and small at the rear.
[0010] Preferably, a pre-dust removal device is installed at the bottom inlet end of the front-stage purification device.
[0011] Preferably, an air flow distributor A is provided in the bottom inlet section of the front-stage purification device, and an air flow distributor B is provided in the bottom inlet section of the rear-stage purification device.
[0012] Preferably, the catalyst and activated carbon in the low-temperature plasma reactor are filled in a fixed bed, and the filling mass ratio of the catalyst to the activated carbon is in the range of 2:8-4:6.
[0013] Preferably, the ozone catalyst comprises a shell arranged in multiple circles and an ozone catalyst in the shell, and the surface of the shell is porous. When the ozone catalyst is combined with ozone, it can generate free radicals and a variety of active substances, and can quickly catalytically decompose VOCs waste gas at room temperature or low temperature, and can decompose most of the VOCs in the waste gas.
[0014] Preferably, a fan is provided at the air outlet at the rear end of the front-end purification device.
[0015] Preferably, the catalyst is a metal oxide catalyst.
[0016] Preferably, the pre-dust removal device is a bag dust collector.
[0017] The beneficial effects of the utility model are as follows: the utility model is provided with a front-end purification device and a rear-end purification device, and a VOCs detector is arranged at the tail air outlet of the front-end purification device to carry out VOCs detection, thereby realizing multi-stage VOCs purification treatment, and can flexibly adapt to the treatment of various VOCs waste gases, so that the VOCs waste gases meet the emission standards after purification treatment. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of the utility model;
[0019] Figure 2 It is a structural schematic diagram of the ozone catalyst in the utility model;
[0020] In the figure: 1. front section purification device, 2. rear section purification device, 3. middle section connecting pipeline, 4. middle section purification outlet, 5. rear section purification outlet, 6. purification inlet, 7. pre-dust removal device, 8. air flow distributor A, 9. ozone inlet, 10. ozone catalyst, 11. VOCs detector, 12. fan, 13. electric control valve, 14. air flow distributor B, 15. low temperature plasma reactor. DETAILED DESCRIPTION
[0021] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:
[0022] Example: Figure 1 and Figure 2 As shown, an industrial organic waste gas VOCs purification equipment comprises a front-end purification device 1 and a rear-end purification device 2, a middle-section connecting pipeline 3 is connected between the tail end outlet of the front-end purification device and the inlet of the rear-end purification device, a middle-section purification outlet 4 is opened in the middle-section connecting pipeline, a rear-section purification outlet 5 is arranged at the tail end of the rear-end purification device, a purification inlet 6 is arranged at the bottom inlet end of the front-end purification device, an ozone inlet 9 is arranged at the bottom inlet section of the front-end purification device, the ozone inlet is connected to an ozone generator, an ozone catalyst 10 is installed in the middle section of the front-end purification device, a VOCs detector 11 is arranged at the tail end outlet of the front-end purification device, an electric control valve 13 is installed at the middle section connecting pipeline and the middle section purification outlet, and a plurality of low-temperature plasma reactors 15 are installed in the middle section of the rear-end purification device, the low-temperature plasma reactors are filled with catalysts and activated carbon, and the low-temperature plasma reactors are connected to a high-frequency and high-voltage power supply.
[0023] The low-temperature plasma reactor is a double-medium barrier discharge plasma reactor, and each low-temperature plasma reactor is evenly spaced and parallelly arranged in a shell along the airflow direction.
[0024] The shells of the front-stage purification device and the rear-stage purification device are respectively formed by an inlet horn which is small at the front and large at the rear, a middle section and an outlet horn which is large at the front and small at the rear.
[0025] The front section purification device is provided with a pre-dust removal device 7 at the bottom inlet end. The front section purification device is provided with an air flow uniformizer A8 at the bottom inlet section, and the rear section purification device is provided with an air flow uniformizer B14 at the bottom inlet section.
[0026] The catalyst and activated carbon in the low-temperature plasma reactor are filled in a fixed bed manner, and the filling mass ratio of the catalyst to the activated carbon ranges from 2:8 to 4:6.
[0027] The ozone catalyst comprises a shell with multiple circles and an ozone catalyst in the shell, and the surface of the shell is porous. A fan 12 is arranged at the outlet of the tail end of the front purification device. The catalyst is a metal oxide catalyst. The pre-dust removal device is a bag dust collector.
[0028] When the industrial organic waste gas VOCs purification equipment is in use, the industrial waste gas enters from the purification inlet at the bottom of the front-stage purification device, and the industrial waste gas first passes through the pre-dust removal device to pre-treat the particulate matter, and then the ozone entering the ozone inlet is mixed with the air flow through the air flow distributor A and enters the ozone catalyst area. Under the stimuli of the ozone catalyst, the VOCs waste gas is quickly catalytically decomposed at room temperature or low temperature conditions, which can decompose most of the VOCs in the waste gas, and the purified waste gas enters the tail end of the front-stage purification device. The VOCs detector detects the VOCs data. If the VOCs emission concentration meets the emission standards, the middle-stage purification outlet is opened through the electric control valve control for exhaust. If it does not meet the emission standards, the waste gas is discharged into the rear-stage purification device through the electric control valve control, and the rear-stage purification device purifies and decomposes the VOCs again to ensure that the VOCs emission concentration meets the emission standards.
[0029] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.
Claims
1. An industrial organic waste gas VOCs purification device, characterized in that: The invention comprises a front section purification device and a rear section purification device, wherein a middle section connecting pipeline is connected between the tail end air outlet of the front section purification device and the inlet of the rear section purification device, a middle section purification outlet is provided in the middle section connecting pipeline, a rear section purification outlet is provided at the tail end of the rear section purification device, a purification inlet is provided at the bottom inlet end of the front section purification device, an ozone inlet is provided at the bottom inlet section of the front section purification device, the ozone inlet is connected to an ozone generator, an ozone catalyst is installed in the middle section of the front section purification device, a VOCs detector is provided at the tail end air outlet of the front section purification device, electric control valves are respectively installed at the middle section connecting pipeline and the middle section purification outlet, a plurality of low-temperature plasma reactors are installed in the middle section of the rear section purification device, the low-temperature plasma reactors are filled with catalysts and activated carbon, and the low-temperature plasma reactors are connected to a high-frequency and high-voltage power supply.
2. The industrial organic waste gas VOCs purification equipment according to claim 1 is characterized in that: The low-temperature plasma reactor is a dual-medium barrier discharge plasma reactor, and each low-temperature plasma reactor is evenly spaced and arranged in parallel in a shell along the airflow direction.
3. The industrial organic waste gas VOCs purification equipment according to claim 1 is characterized in that: The shells of the front-stage purification device and the rear-stage purification device are respectively formed by an inlet horn that is small at the front and large at the rear, a middle section, and an outlet horn that is large at the front and small at the rear.
4. The industrial organic waste gas VOCs purification equipment according to claim 1 is characterized in that: A pre-dust removal device is installed at the bottom inlet end of the front-stage purification device.
5. The industrial organic waste gas VOCs purification equipment according to claim 1 is characterized in that: An airflow uniformizer A is arranged in the bottom inlet section of the front-stage purification device, and an airflow uniformizer B is arranged in the bottom inlet section of the rear-stage purification device.
6. The industrial organic waste gas VOCs purification equipment according to claim 1 is characterized in that: The catalyst and activated carbon in the low-temperature plasma reactor are filled in a fixed bed manner, and the filling mass ratio of the catalyst to the activated carbon is in the range of 2:8-4:
6.
7. The industrial organic waste gas VOCs purification equipment according to claim 1 is characterized in that: The ozone catalyst comprises a shell arranged in multiple circles and an ozone catalyst in the shell, and the surface of the shell is arranged in multiple holes.
8. The industrial organic waste gas VOCs purification equipment according to claim 1 is characterized in that: A fan is arranged at the air outlet at the rear end of the front-stage purification device.
9. The industrial organic waste gas VOCs purification equipment according to claim 1 is characterized in that: The catalyst is a metal oxide catalyst.
10. The industrial organic waste gas VOCs purification equipment according to claim 4 is characterized in that: The pre-dust removal device is a bag dust collector.