CN104923074B - One kind is based on light-catalysed organic waste gas treatment device - Google Patents

Abstract

The invention discloses a device for treating organic waste gas based on photocatalysis, which comprises a pre-filter assembly, at least one photocatalysis assembly, induced draft fan and exhaust assembly; said pre-filtration assembly, photocatalysis assembly, induced draft fan and exhaust The air components are sequentially connected through pipelines; the pre-filter assembly includes a filter housing and a plurality of filter plates arranged in parallel inside the filter housing; the filter plate includes an installation frame, a filter plate arranged inside the installation frame, and a filter Filter screens on both sides of the plate; the photocatalytic assembly includes a photocatalytic housing and a plurality of ultraviolet lamp tubes arranged inside the photocatalytic housing; the installation direction of the ultraviolet lamp tubes is parallel to the airflow direction; the photocatalytic housing The inner walls are provided with a titanium dioxide coating. The invention designs a process of sequentially filtering, reacting and discharging the organic waste gas, has a reasonable structure, and has the effects of saving materials and improving purification.

Description

A photocatalytic organic waste gas treatment device

technical field

The invention relates to a device for treating organic waste gas based on photocatalysis.

Background technique

With the progress of society and the continuous expansion of industrial technology, the weaving of textiles and the production of decorative fabrics such as composite cloth, bronzing cloth, and laminated cloth are becoming more and more common. Make a large amount of organic solvents such as polyester, resin, glue, methyl ethyl ketone, thinner and other organic solvents, these heated polyester, resin, glue, methyl ethyl ketone, thinner and other organic solvents will become volatile organic waste gas, The direct emptying of these organic waste gases will cause serious pollution to the environment and endanger human health and the ecological environment. In order to protect the environment and avoid air pollution, waste gas containing harmful gases must be purified before being discharged into the atmosphere. The amount or concentration of harmful gases discharged into the atmosphere must not exceed the value specified in the emission standards. For example, high-altitude emissions only solve the pollution in local areas. The problem is that the total amount of harmful substances discharged into the atmosphere has not been reduced, and the problem of air pollution has not been fundamentally solved. Existing waste gas treatment equipment such as photocatalytic organic waste gas processor, because the organic waste gas contains some dust particles, if it passes through the photocatalytic organic waste gas processor, the dust particles will remain in the processor, thus affecting the normal photocatalytic reaction In addition, since the exhaust gas has a certain temperature, if the exhaust gas is directly treated by photocatalysis, the reaction efficiency and quality of the exhaust gas will be reduced.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a photocatalysis-based organic waste gas treatment device.

The purpose of the present invention is achieved through the following technical solutions: a photocatalytic organic waste gas treatment device, which includes a pre-filter assembly, at least one photocatalytic assembly, induced draft fan and exhaust assembly; said pre-filter assembly , photocatalytic component, induced draft fan and exhaust component are connected in sequence through pipelines;

The pre-filter assembly includes a filter housing and a plurality of filter plates arranged in parallel inside the filter housing; the inner wall of the filter housing is provided with a slot for use with the filter plate; the filter plate includes a mounting frame, a set The filter plate inside the installation frame and the filter screens arranged on both sides of the filter plate; the filter plate is installed inside the filter housing through a slot;

The photocatalytic assembly includes a photocatalytic housing and a plurality of ultraviolet lamp tubes arranged inside the photocatalytic housing; the interval between the ultraviolet lamp tubes and the interval between the ultraviolet lamp tube and the housing are the same, and the ultraviolet lamp tube The installation direction is parallel to the airflow direction; the inner wall of the photocatalytic shell is provided with a titanium dioxide coating.

The filter plate is an activated carbon fiber filter plate.

The filter casing of the pre-filter assembly is provided with a first door body for maintenance, and a handle is provided on the first door body.

The photocatalytic component also includes a plurality of activated carbon fibers with nano-titanium dioxide photocatalysts arranged around the ultraviolet lamp tube.

The photocatalytic assembly is also provided with a second door body with an observation window, and a handle is arranged on the second door body.

The induced fan is a negative pressure operated induced fan.

The exhaust assembly is 15 meters high.

The beneficial effects of the present invention are as follows: 1. Through the structure of the pre-filter assembly and the multi-layer activated carbon filter plate, organic particles can be effectively removed and the degradation rate of organic waste gas can be improved. 2. It can effectively guarantee the reflection and degradation time of organic waste gas and meet the high standard treatment requirements. 3. It is convenient to disassemble, install, maintain and replace the activated carbon fiber filter plate, and reduce the cost of use. 4. It is convenient to clean the dust and oil on the surface of the ultraviolet lamp tube, and ensure the penetration rate and irradiation intensity of ultraviolet rays. 5. It has the characteristics of stable and reliable operation, low operating cost and convenient maintenance. 6. Using multi-level photocatalytic components, the effect is better.

Description of drawings

Fig. 1 is a structural block diagram of the present invention.

detailed description

The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings: As shown in Figure 1, a photocatalytic organic waste gas treatment device includes a pre-filter assembly, at least one photocatalytic assembly, induced draft fan and exhaust assembly; The pre-filter assembly, photocatalytic assembly, induced draft fan and exhaust assembly are sequentially connected through pipelines;

The pre-filter assembly includes a filter housing and a plurality of filter plates arranged in parallel inside the filter housing; the inner wall of the filter housing is provided with a slot for use with the filter plate; the filter plate includes a mounting frame, a set The filter plate inside the installation frame and the filter screens arranged on both sides of the filter plate; the filter plate is installed inside the filter housing through a slot;

The photocatalytic assembly includes a photocatalytic housing and a plurality of ultraviolet lamp tubes arranged inside the photocatalytic housing; the interval between the ultraviolet lamp tubes and the interval between the ultraviolet lamp tube and the housing are the same, and the ultraviolet lamp tube The installation direction is parallel to the airflow direction; the inner wall of the photocatalytic shell is provided with a titanium dioxide coating.

The filter plate is an activated carbon fiber filter plate.

A plurality of activated carbon fiber filter plates are installed in the pre-filter component, which can increase the effective cross-sectional area of the pre-filter component several times and reduce wind pressure loss. At the same time, the activated carbon fiber filter plates are installed separately, so that the new and old plates can be alternated and the old plates can be reused while ensuring the flow resistance.

The filter casing of the pre-filter assembly is provided with a first door body for maintenance, and a handle is provided on the first door body. Through the maintenance door, it is convenient to disassemble, install, maintain and replace the activated carbon fiber filter plate, and the maintenance door can prevent the leakage of ozone.

The photocatalytic component also includes a plurality of activated carbon fibers with nano-titanium dioxide photocatalysts arranged around the ultraviolet lamp tube.

The photocatalytic assembly is also provided with a second door body with an observation window, and a handle is arranged on the second door body.

The induced fan is a negative pressure operated induced fan.

The exhaust assembly is 15 meters high.

During actual work, the organic waste gas is filtered by the pre-filter component and then enters the photocatalytic component. After being treated by high-energy ultraviolet photolysis and catalytic oxidation, it is discharged by the induced draft fan operated by negative pressure to an altitude of 15 meters to meet the standard.

In the photocatalytic component, ozone and OH (hydroxyl free radicals) produced by the reaction of high-energy ultraviolet light beams with air and titanium dioxide perform synergistic decomposition and oxidation reactions on odorous gases. The malodorous gas substance is converted into odorless small molecular compounds or completely mineralized to generate water and CO2, which are discharged into the atmosphere through the exhaust pipe after reaching the standard, and the entire decomposition and oxidation process is completed within 1 second; A large number of free electrons are generated, and most of these electrons can be obtained by oxygen to form negative oxygen ions (O3-). Negative oxygen ions are unstable, and it is easy to lose an electron to become active oxygen (ozone). Ozone is an advanced oxidant. It can oxidize and decompose organic and inorganic substances. Under the action of ozone, these malodorous gases are decomposed from macromolecular substances to small molecular substances until they are mineralized. Photocatalytic components can efficiently remove volatile organic compounds (VOC), inorganic substances, hydrogen sulfide , ammonia, mercaptans and other major pollutants, as well as various targeted odors, the deodorization efficiency is as high as 96%.

Ultraviolet light decays quickly in the air. The closer the distance between the ultraviolet lamp and the organic waste gas, the better the photolysis effect of organic matter, that is, the distance is inversely proportional to the effect. The dose of ultraviolet radiation is the main index to ensure the photolysis rate of organic waste gas. When the irradiation time is fixed, it is very important to ensure the intensity of ultraviolet light to meet the photolysis rate of organic waste gas. Therefore, the ultraviolet light tube is evenly installed in the casing, and the ultraviolet light scattered around can effectively photodegrade the organic waste gas entering the photocatalytic treatment component, thereby improving the degradation efficiency.

The invention designs a process of sequentially filtering, reacting and discharging the organic waste gas, has a reasonable structure, and has the effects of saving materials and improving purification.

Claims (1)

1. A device for treating organic waste gas based on photocatalysis, characterized in that: it includes a pre-filter assembly, at least one photocatalysis assembly, induced draft fan and exhaust assembly; said pre-filtration assembly, photocatalysis assembly, induced draft fan and the exhaust components are sequentially connected through pipelines; The pre-filter assembly includes a filter housing and a plurality of filter plates arranged in parallel inside the filter housing; the inner wall of the filter housing is provided with a slot for use with the filter plate; the filter plate includes a mounting frame, a set The filter plate inside the installation frame and the filter screens arranged on both sides of the filter plate; the filter plate is installed inside the filter housing through a slot; The photocatalytic assembly includes a photocatalytic housing and a plurality of ultraviolet lamp tubes arranged inside the photocatalytic housing; the interval between the ultraviolet lamp tubes and the interval between the ultraviolet lamp tube and the housing are the same, and the outer lamp tube The installation direction is parallel to the airflow direction; the inner wall of the photocatalytic shell is provided with a titanium dioxide coating; the filter plate is an activated carbon fiber filter plate; the filter shell of the pre-filter assembly is provided with a convenient maintenance first The door body, the first door body is provided with a handle; the photocatalytic assembly also includes a plurality of activated carbon fibers with nano-titanium dioxide photocatalysts arranged around the ultraviolet lamp tube; the photocatalytic assembly is also provided with A second door body with an observation window, the second door body is provided with a handle; the induced draft fan is a negative pressure operated induced fan; the exhaust assembly is 15 meters high; During actual work, the organic waste gas is filtered by the pre-filter component and then enters the photocatalytic component. After being treated by high-energy ultraviolet photolysis and catalytic oxidation, it is discharged to the altitude of 15 meters by the induced draft fan operated by negative pressure to meet the standard discharge; Through the pre-filter assembly and multi-layer activated carbon filter plate structure, organic particles can be effectively removed and the degradation rate of organic waste gas can be improved; the reflection and degradation time of organic waste gas can be effectively guaranteed to meet high-standard treatment requirements; the activated carbon fiber filter plate is convenient for disassembly, assembly and maintenance. Maintenance and replacement can reduce the cost of use; it is convenient to clean the dust and oil on the surface of the ultraviolet lamp tube, and ensure the penetration rate and irradiation intensity of ultraviolet rays; it has the characteristics of stable and reliable operation, low operating cost and convenient maintenance; it adopts multi-stage photocatalytic components, Better results.