CN108096969B - A tail gas photooxygen cracking treatment method based on volatile oil and gas purification technology - Google Patents

Abstract

The utility model discloses a tail gas photooxidation cracking treatment method based on a volatile oil gas purification technology, wherein organic waste gas enters a cyclone defogging dust fall cooler, macromolecular pollutants are degraded and decomposed into micromolecular substances by oil gas purification electric field equipment, the micromolecular substances enter a front spray tower to fix dust particles in spray liquid, and then enter a photooxidation cracking cabinet through an air pipe to carry out waste gas oxidation treatment; in the process of oxidizing waste gas, a waste gas concentration detection sensor arranged at the inlet of the photooxidation cracking cabinet detects the concentration of the waste gas in real time and feeds signals back to a singlechip control system, a high-energy ultraviolet lamp group module and a light tube in an ozone supply module are controlled to be regularly combined on and off; finally, the waste gas enters a dry flue gas comprehensive treatment tank and an ozone filter screen to realize ultra-clean emission after waste gas treatment. The utility model can realize the energy-saving and high-efficiency operation of the whole system, prolong the service life of the lamp group module, improve the organic waste gas treatment effect, avoid the secondary pollution problem caused by the traditional wet process and realize ultra-clean emission.

Description

A tail gas photooxygen cracking treatment method based on volatile oil and gas purification technology

Technical field

The present invention relates to the technical field of waste gas treatment, specifically a tail gas photooxygen cracking treatment method based on volatile oil and gas purification technology.

Background technique

Air pollution is one of the most prominent environmental problems in our country. Among them, industrial waste gas is an important source of atmospheric pollutants. The most difficult to treat among industrial waste gases is organic waste gas, which mainly comes from the waste gas emitted during the production process of the petrochemical and rubber industry. In addition to causing direct air pollution, organic waste gas also participates in complex reactions in the atmosphere to generate secondary pollutants. Become one of the main sources of PM2.5. Therefore, the problem of organic waste gas treatment and purification needs to be solved urgently.

Traditional organic waste gas purification and treatment methods mainly include: direct high-temperature combustion method, catalytic oxidation method, ozone deodorization method, activated carbon adsorption method, acid-base liquid spray method, biological deodorization method, etc. To varying degrees, these methods have problems such as high equipment investment, high operating costs, small gas processing volume, unstable operation, large space occupation, low deodorization and purification efficiency, and secondary pollution. At present, new ultraviolet waste gas treatment systems have been increasingly used. After ultraviolet treatment, the molecular chains of macromolecule organic waste gas are broken into small molecule pollutants, and then the waste gas can be discharged through subsequent equipment treatment. reduced to a very low level.

In the Chinese patent document, CN103505990A relates to a UV-VOC exhaust gas treatment device, which includes a box body. A photolysis oxidation fission chamber is provided in the box body. The photolysis oxidation fission chamber is connected to the exhaust gas inlet through a pipeline. Connection; an excitation high-voltage device is provided in the photolytic oxidative fission chamber for fission and decomposition of organic waste gas; a control system is also provided on the box; the control system includes a main controller, a negative pressure sensor, and a photoelectric sensor, Realize the overall operation and safety control of the equipment. The present invention effectively realizes the purification treatment of waste gas through the photolytic oxidation fission chamber, fully oxidizes and fission the organic waste gas and discharges it without pollution; realizes the filtration and separation of the waste gas through the pretreatment section, which provides a basis for the subsequent photolysis oxidation fission treatment system of the waste gas. Treatment creates conditions; the application of water circulation system doubles the service life of the photolysis oxidation fission device treatment system. CN104667674B relates to the technical field of air purification treatment, in particular to painting exhaust gas treatment processes and devices, including paint mist treatment, which treats dust particles in the exhaust gas through water spraying; photocatalytic treatment, which removes organic or inorganic polymer malodorous compounds in the exhaust gas. The molecular chains are degraded and converted into low molecular compounds, thereby modifying them into hydrophilic gases; and the gas-liquid mixing process removes odors in the exhaust gas, and the exhaust gas treatment is more thorough. The device has a paint mist treatment tower, a photocatalytic processor and a gas-liquid mixing processor. The three are coaxially connected in sequence to form a sealed channel. The painting exhaust gas is treated according to the above process. It has a simple structure, is easy to make, and has great purification effects. Good, suitable for industrial waste gas treatment. CN105964120A discloses an exhaust gas treatment system, including an alkali spray tower, a plant liquid spray tower, a photocatalytic oxidation device, a fan and a chimney. The alkali spray tower, plant liquid spray tower, photocatalytic oxidation device, fan and The chimneys are connected in turn. Compared with traditional technology, this invention has scientific design and obvious effect on treating waste gas. It combines acid-base treatment, biochemical treatment and photocatalytic oxidation treatment in one system, and can fully treat mixed waste gas and make it discharge after reaching the standard. The utility model patent titled "Combined Plastic Granulation Waste Gas Purification System" and the publication number is CN205550040U discloses a technical solution, including a spray scrubber, a cyclone water and gas separation device, and waste gas treatment equipment. The waste gas treatment equipment includes activated carbon. Adsorption chamber, UV photooxygen catalytic chamber and low-temperature plasma equipment. The above technology can effectively remove smoke and organic waste from exhaust gas. However, the intelligent control level of the above technical solutions is very low, and the processing power of the ultraviolet equipment cannot be controlled in real time according to the concentration of pollutants, resulting in a waste of energy or problems with substandard pollutant treatment. In addition, when the waste gas treated by ultraviolet equipment is discharged, due to the limitations of traditional wet post-treatment equipment (usually using scrubbers), it will also cause secondary pollution problems caused by the discharge of pollutants with the flow of water mist in the gas.

Contents of the invention

In order to solve the above technical problems, the present invention provides a tail gas photooxygen cracking treatment method based on volatile oil and gas purification technology, which can be used for cracking waste gases such as waste rubber and waste plastics in chemical plants, tail gases during rubber product processing and reclaimed rubber processing, and Exhaust gas treatment in the catering industry; the purpose is to realize intelligent control of ultraviolet equipment, effectively save energy, improve work efficiency, and achieve ultra-clean emissions of exhaust gas.

In order to achieve the above objects, the technical solutions of the present invention are as follows:

A tail gas photooxygen cracking treatment method based on volatile oil and gas purification technology, including:

1) The organic waste gas from the factory enters the cyclone demisting and dust-reducing cooler for demisting and dust reduction. The waste gas after preliminary treatment will be passed into the oil and gas purification electric field equipment; the oil and gas purification electric field equipment removes larger pollutant molecules, oil, etc. Decomposition occurs, and reactive free radicals such as hydroxyl groups (-OH) and reactive oxygen species (-O) and O ₃ produced at the same time react chemically with harmful gas molecules, degrading pollutants with larger molecules into small molecular substances;

2) The organic waste gas after preliminary dust removal enters the front-end spray tower, and the front-end spray tower fixes the dust particles in the organic waste gas in the spray liquid through spraying;

3) The organic waste gas after dust removal enters the photo-oxygen cracking cabinet through the air duct. The organic waste gas passes through the dust-proof and moisture-proof filter at the entrance of the photo-oxygen cracking cabinet for further dust removal and moisture filtration. The high-energy ultraviolet lamp module breaks the chains of macromolecules of the organic waste gas. , the ozone supply module further oxidizes the broken small molecule waste gas, the TiO ₂ catalytic network participates in the catalysis, and the organic waste gas is decomposed into CO ₂ , H ₂ O, sulfur oxides, and nitrogen oxides;

4) During the processing in step 3), the exhaust gas concentration detection sensor installed at the entrance of the photooxygen cracking cabinet will detect the exhaust gas concentration in real time and feed the signal back to the microcontroller control system. The microcontroller control system will judge the corresponding concentration range based on the input signal and enable it. The independently optimized and designed control program controls the regular combination of high-energy ultraviolet lamp module and ozone supply module to turn on and off to achieve energy-saving and efficient treatment of organic waste gas;

5) The treated gas enters the dry flue gas comprehensive treatment tank under the action of the negative pressure induced draft fan to achieve the fixation of sulfur and nitrogen oxides, and is installed at the exhaust port of the dry flue gas comprehensive treatment tank The ozone filter reduces unconsumed ozone generated throughout the system into oxygen.

6) If the treated gas concentration does not reach the minimum exhaust gas concentration emission standard set by the system, the intelligent control cabinet will control the three-way electromagnetic switch valve to discharge the gas through the three-way electromagnetic switch valve in front of the last exhaust port. The pipeline switch on the side entering the atmosphere is closed, so that the untreated gas that meets the standard is transported again through the pipeline to the front-end processing equipment for further processing until the detection value of the rear exhaust gas concentration detection sensor meets the concentration standard value set by the system, and the intelligent control cabinet Only then will the three-way electromagnetic switch valve be controlled to open the pipeline switch that discharges gas into the atmosphere. The post-exhaust gas concentration detection sensor installed behind the ozone filter will detect the gas. The single-chip microcomputer control system will record the gas component and do the same next time. When treating the exhaust gas of the components, the microcontroller control system in the intelligent control cabinet controls the high-energy ultraviolet lamp group module and the ozone supply module. The shape of each group of turned-on lamps is arranged according to the corresponding concentration level of the upper level, and finally the organic waste gas is processed. of ultra-clean emissions.

The specific process flow of the present invention is: first, a self-designed cyclone defogger and dust-reducing cooler is used to defog and dust-reducing the exhaust gas discharged from the factory. At the same time, the exhaust gas flowing through the cyclone defogging and dust-reducing cooler will be cooled to facilitate subsequent processing. For the treatment of waste gas, the preliminary treated waste gas will be passed into the oil and gas purification electric field equipment. The high-energy electrons, ions, excited state particles and strongly oxidizing free radicals generated by the oil and gas purification electric field equipment under high voltage will mix with the pollutants in the waste gas. Interaction occurs, causing larger pollutant molecules, oil, etc. to decompose in a very short time. At the same time, a large number of active free radicals such as hydroxyl groups (-OH) and reactive oxygen species (-O) are produced and are extremely oxidizing. O ₃ reacts chemically with harmful gas molecules. First, pollutants with larger molecules are degraded into small molecular substances for further processing by subsequent devices. Then, a spray tower is used to remove the remaining particulate matter in the exhaust gas of the rubber factory, and then enters the intelligent High-efficiency photo-oxygen cracking cabinet, the self-optimized control program controls the regular combination switch of ultraviolet lamps and high-energy ion tubes through the feedback signal of the sensor that detects the concentration of pollutants at the entrance of the intelligent high-efficiency photo-oxygen cracking cabinet. At the same time, TiO ₂ Under the catalytic action of the catalytic network, the macromolecules of the organic waste gas are more efficiently destroyed and oxidized, and then enter the dry flue gas comprehensive treatment tank under the negative pressure formed by the draft fan at the outlet of the intelligent and efficient photooxygen cracking cabinet. , to fix the sulfur oxides and avoid the leakage of sulfur oxides caused by the traditional spray method. An ozone filter is installed at the exhaust port of the dry flue gas comprehensive treatment tank to remove the unconsumed sulfur oxides generated in the entire system. The ozone is reduced to oxygen, ensuring zero emission of ozone, and finally the clean gas processed by the entire system is discharged into the atmosphere.

Compared with the existing technology, this solution is based on the concept of intelligent control. The single-chip microcomputer control system uses the feedback signal of the sensor that detects the concentration of pollutants at the entrance of the photooxygen cracking cabinet to control the regular combination of on and off of the lamp module to achieve control. Energy-saving and efficient treatment of organic waste gas. In addition, the treated gas enters the dry flue gas comprehensive treatment tank under the action of the induced draft fan to fix the sulfur oxides and avoid the leakage of sulfur oxides caused by the traditional spray method. The exhaust port of the comprehensive gas treatment tank is equipped with an ozone filter that can reduce the unconsumed ozone generated in the entire system to oxygen, ensuring zero emission of ozone and discharging the processed clean gas into the atmosphere. The self-designed cyclone demisting and dust-reducing cooler is used to demist and reduce dust on the exhaust gas discharged from the factory. At the same time, the exhaust gas flowing through the cyclone de-misting and dust-reducing cooler will be cooled to facilitate the subsequent treatment of the exhaust gas. The exhaust gas after preliminary treatment When the oil and gas purification electric field equipment is passed into the oil and gas purification electric field equipment, the high-energy electrons, ions, excited state particles and strongly oxidizing free radicals generated by the oil and gas purification electric field equipment under high voltage interact with the pollutants in the exhaust gas, causing larger pollutants to Molecules, oil, etc. decompose in a very short time. At the same time, a large number of active free radicals such as hydroxyl radicals (-OH) and reactive oxygen species (-O) and extremely oxidizing O ₃ are produced, which chemically react with harmful gas molecules. In the reaction, pollutants with larger molecules are first degraded into small molecular substances for further processing by subsequent devices. A front-end spray tower is used to fix the dust particles in the organic waste gas of the factory into the spray liquid through spraying for preliminary further dust removal. This solution is conducive to extending the service life of the lamp module and improving the organic waste gas treatment effect. Through experimental research, it was found that the service life of the lamp module can be extended by 35%, and the organic waste gas treatment effect can be improved by 26%.

Based on the above solution, the present invention also makes the following improvements:

The self-designed cyclone demisting and dust-reducing cooler is used to demist and reduce dust on the exhaust gas discharged from the factory. At the same time, the exhaust gas flowing through the cyclone de-misting and dust-reducing cooler will be cooled to facilitate the subsequent treatment of the exhaust gas. The exhaust gas after preliminary treatment It will pass into the oil and gas purification electric field equipment. The high-energy electrons, ions, excited state particles and strongly oxidizing free radicals generated by the oil and gas purification electric field equipment under high voltage interact with the pollutants in the exhaust gas, causing greater pollution. Chemical molecules, oil, etc. decompose in a very short time. At the same time, a large amount of active free radicals such as hydroxyl groups (-OH) and reactive oxygen species (-O) and extremely oxidizing O ₃ are produced, which interact with harmful gas molecules. The chemical reaction first degrades pollutants with larger molecules into small molecular substances for further processing by subsequent devices.

The layout of the lamps turned on by the high-energy ultraviolet lamp module and the ozone supply module follows the principle of spatial distribution uniformity. In this improvement plan, the feedback signal of the sensor that detects the exhaust gas concentration at the entrance of the photooxygen cracking cabinet is used, and the control program independently optimized and designed by the microcontroller is used to control the regular combination of turning on and off the ultraviolet lamp and high-energy ion tube. The opening of the lamp follows the principle of spatial distribution uniformity in order to ensure the uniformity of the reaction.

The high-energy ultraviolet lamp group module includes 4 groups, and the ozone supply module includes 3 groups. Each group of lamp groups includes 4 lamp tubes. The method of controlling the opening of the lamp tubes is:

When the exhaust gas concentration is 0-150mg/m ³ , in the high-energy ultraviolet lamp group module, each group only turns on one lamp, and the lamps turned on in all groups have different positions, and the overall shape is "W" or "M"-shapedarrangement; in the ozone supply module, only the middle light tube in the first group and the third group is turned on, and the positions of the turned on light tubes are staggered;

When the exhaust gas concentration is 150-200 mg/m ³ , in the high-energy ultraviolet lamp group module, each group turns on 2 lamps, and the whole is arranged in a staggered manner of ">" and "<"; in the ozone supply module, turn on the first group and the For the 2 lamps in the second group, the position of the lamp that is turned on is ">" or "<";

When the exhaust gas concentration is 200-250 mg/m ³ , in the high-energy ultraviolet lamp module, the first and third groups of lamps are all turned on, and the second group and the fourth group are both turned on 2 lamps and the lamps are arranged in a staggered manner; In the ozone supply module, each group turns on 2 lamps, arranged in a staggered pattern of ">" and "<";

When the exhaust gas concentration is ^above 250mg/m3, all lamps in the high-energy ultraviolet lamp group module are turned on; in the ozone supply module, all lamps in the first group are turned on, and 2 lamps in the second and third groups are turned on, and the second and third groups are arranged in a “>” or “<” shape.

The entrance of the photooxygen cracking cabinet is equipped with a replaceable dust-proof and moisture filter. This improvement plan uses a replaceable dust-proof and moisture filter to further remove dust and moisture from the exhaust gas, protect the photooxygen cracking cabinet, prevent excessive moisture from causing accidental discharge of the lamp module, and ensure a suitable working environment for the photooxygen cracking cabinet. .

TiO ₂ catalytic nets are evenly distributed between the lamp group modules. The TiO ₂ catalytic nets participate in the catalysis, and the organic waste gas is decomposed into CO ₂ , H ₂ O, sulfur oxides, and nitrogen oxides. In this improvement plan, under the catalytic action of TiO ₂ catalytic network, macromolecules of organic waste gas are destroyed and oxidized more efficiently, thereby improving efficiency.

The induced draft fan is a negative pressure induced draft fan. In this improvement plan, the gas flow power of the entire device is provided by a negative pressure induced draft fan. Due to the existence of negative pressure, it is ensured that untreated organic waste gas in the photooxygen cracking cabinet and even the entire device will not leak out and cause environmental pollution.

The exhaust gas that finally enters the dry flue gas comprehensive treatment tank fixes the sulfur oxides to avoid the leakage of sulfur oxides caused by the traditional spray method. Install a The ozone filter can reduce the unconsumed ozone generated in the entire system to oxygen, ensuring zero emission of ozone. Finally, the clean gas processed by the entire system is discharged into the atmosphere.

Description of drawings

Figure 1 is a three-dimensional structural view of the equipment included in the present invention.

Figure 2 is a three-dimensional structural diagram of the interior of the photooxygen cracking cabinet of the present invention.

Figure 3 is a three-dimensional structural diagram of the high-energy ultraviolet lamp module of the present invention.

Figure 4 Structural diagram of the high-energy ultraviolet lamp group module and ozone supply module lamp group of the present invention

In the picture: 1-Cyclone demisting and dust-reducing cooler, 2-Oil and gas purification electric field equipment, 3-Front-end spray tower, 4-Exhaust gas concentration detection sensor, 5-Photooxygen cracking cabinet, 6-Dust-proof moisture filter, 7- High-energy UV lamp module, 8-ozone supply module, 9-TiO ₂ catalytic network, 10-intelligent control cabinet, 11-negative pressure induced draft fan, 12-dry flue gas comprehensive treatment tank, 13-ozone filter, 14 -Rear exhaust gas concentration detection sensor, 15-way solenoid switch valve.

Detailed ways

The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

A tail gas photooxygen cracking treatment method based on volatile oil and gas purification technology, including,

An exhaust gas treatment device for a rubber factory, including a cyclone defogger and dust reduction cooler 1, oil and gas purification electric field equipment 2, front-end spray tower 3, exhaust gas concentration detection sensor 4, photooxygen cracking cabinet 5, dust-proof and moisture filter 6 , high-energy ultraviolet lamp module 7, ozone supply module 8, TiO ₂ catalytic network 9, single chip control system, negative pressure induced draft fan 11, dry flue gas comprehensive treatment tank 12, ozone filter 13; cyclone defogger and dust reduction cooler The air inlet and exhaust port of 1 are connected to the factory exhaust port and the oil and gas purification electric field equipment 2 respectively. The exhaust port of the oil and gas purification electric field equipment 2 is connected to the front-end spray tower 3, and the front-end spray tower 3 is connected to the photooxygen cracking cabinet 5. Through the air duct connection, the exhaust gas concentration detection sensor 4 is installed at the entrance of the photooxygen cracking cabinet 5, the dust-proof moisture filter 6 is installed in the slot at the entrance of the photooxygen cracking cabinet 5, and the high-energy ultraviolet lamp group module 7 is installed in a certain number and The ozone supply modules 8 are installed in the photooxygen cracking cabinet 5 at a certain number and at a certain distance and are at the rear end of the high-energy ultraviolet lamp group module 7. The TiO ₂ catalytic net 9 is evenly installed on each high-energy ultraviolet ray. Between the lamp module modules 7 and between each ozone supply module 8, the single-chip microcomputer control system is installed in the intelligent control cabinet of the photooxygen cracking cabinet 5, and the negative pressure induced draft fan 11 is installed at the air outlet of the photooxygen cracking cabinet 5 and is a negative pressure The air outlet of the induced draft fan 11 is connected to the dry flue gas comprehensive treatment tank 12. An ozone filter 13 is installed at the exhaust port of the dry flue gas comprehensive treatment tank 12. A post-exhaust gas is installed behind the ozone filter 13. The concentration detection sensor 14 is equipped with a three-way electromagnetic switch valve 15 in front of the last exhaust port. The air pipe connected to the three-way electromagnetic switch valve 15 is connected to the side of the outlet pipe of the cyclone defogger and dust reduction cooler 1. For example, after processing If the gas concentration does not reach the minimum exhaust gas concentration emission standard set by the system, the intelligent control cabinet 10 will control the three-way electromagnetic switch valve 15 to close the pipeline switch on the side of the gas discharge into the atmosphere, so that the untreated gas that meets the standard can pass through the pipeline again. It is sent to the front-end processing equipment for further processing. Until the detection value of the rear exhaust gas concentration detection sensor 14 meets the concentration standard value set by the system, the intelligent control cabinet 10 will control the three-way electromagnetic switch valve 15 to open the pipeline switch for discharging the gas into the atmosphere. , the single-chip microcomputer control system in the intelligent control cabinet 10 records the gas composition at the same time. The next time the exhaust gas with the same composition is treated, the single-chip microcomputer control system in the intelligent control cabinet 10 controls the high-energy ultraviolet lamp group module 7 and the ozone supply module 8 , the shape of each group of turned-on lamps is arranged according to the previous level of the corresponding concentration level, and so on, until the highest concentration level.

As shown in Figures 1, 2, 3, and 4, the working mode of the waste gas treatment device for a rubber factory of the present invention is: the organic waste gas of the factory enters the self-designed cyclone defog and dust reduction cooler 1 to remove the waste gas discharged from the factory. At the same time, the exhaust gas flowing through the cyclone mist and dust reduction cooler 1 will be cooled to facilitate the subsequent treatment of the exhaust gas. The preliminary treated exhaust gas will be passed into the oil and gas purification electric field equipment 2. The oil and gas purification electric field equipment 2 is in High-energy electrons, ions, excited particles and strongly oxidizing free radicals generated under high voltage interact with pollutants in the exhaust gas, causing larger pollutant molecules, oil, etc. to decompose in a very short time. At the same time, a large number of active free radicals such as hydroxyl groups (-OH) and reactive oxygen species (-O) and extremely oxidizing O ₃ react chemically with harmful gas molecules, first degrading pollutants with larger molecules into smaller ones. The molecular substances wait for further processing by subsequent devices. The front-end spray tower 3 fixes the dust particles in the initially treated factory organic waste gas in the spray liquid through spraying. Then, the organic waste gas after dust removal again enters the high-efficiency photooxygen cracking through the air duct. Cabinet body 5, the organic waste gas sequentially passes through the dust-proof and moisture-proof filter 6 for further dust removal and moisture filtration, the high-energy ultraviolet lamp module 7 has a chain-breaking effect on the large molecules of the organic waste gas, and the ozone supply module 8 has a chain-breaking effect on the small molecule waste gas. With the further oxidation and the catalytic effect of the TiO ₂ catalytic network 9 in this process, the organic waste gas is basically decomposed into CO ₂ , H ₂ O, sulfur oxides, nitrogen oxides, etc. During the treatment process, a high-efficiency The exhaust gas concentration detection sensor 4 at the entrance of the photooxygen cracking cabinet 5 will detect the concentration of pollutants in real time and feedback the signal to the microcontroller control system. The microcontroller control system will judge the corresponding concentration range based on the input signal and activate an independently optimized control program for control. The regular combination switches of the high-energy ultraviolet lamp module 7 and the ozone supply module 8 realize energy-saving and efficient treatment of organic waste gas. The processed gas enters the dry flue gas comprehensive treatment tank 12 under the action of the negative pressure induced draft fan 11 to achieve To fix sulfur and nitrogen oxides, an ozone filter 13 is installed at the exhaust port of the dry flue gas comprehensive treatment tank 12 to reduce the unconsumed ozone generated in the entire system to oxygen, ensuring zero emission of ozone. Finally Achieve ultra-clean emissions after organic waste gas treatment.

1) The organic waste gas from the factory enters the cyclone demisting and dust-reducing cooler for demisting and dust reduction. The waste gas after preliminary treatment will be passed into the oil and gas purification electric field equipment; the oil and gas purification electric field equipment removes larger pollutant molecules, oil, etc. Decomposition occurs, and reactive free radicals such as hydroxyl groups (-OH) and reactive oxygen species (-O) and O ₃ produced at the same time react chemically with harmful gas molecules, degrading pollutants with larger molecules into small molecular substances;

2) The organic waste gas after preliminary dust removal enters the front-end spray tower 1, and the front-end spray tower 1 fixes the dust particles in the organic waste gas in the spray liquid through spraying;

3) The organic waste gas after dust removal enters the photo-oxygen cracking cabinet 3 through the air duct. The organic waste gas passes through the dust-proof and moisture-proof filter 4 at the entrance of the photo-oxygen cracking cabinet 3 for further dust removal and moisture filtering. The high-energy ultraviolet lamp module 5 separates the organic waste gas. The large molecule chain is broken, and the ozone supply module 6 further oxidizes the small molecule exhaust gas after the chain break;

4) During step 3), the exhaust gas concentration detection sensor 2 installed at the entrance of the photooxygen cracking cabinet will detect the exhaust gas concentration in real time and feed the signal back to the microcontroller control system. The microcontroller control system will judge the corresponding concentration range based on the input signal and Enable the self-optimized design control program to control the regular combination of high-energy ultraviolet lamp module 5 and ozone supply module 6 to turn on and off to achieve energy-saving and efficient treatment of organic waste gas;

5) The treated gas enters the dry flue gas comprehensive treatment tank 10 under the action of the induced draft fan 9 to achieve the fixation of sulfur and nitrogen oxides, which is installed at the exhaust port of the dry flue gas comprehensive treatment tank. The ozone filter reduces the unconsumed ozone generated in the entire system into oxygen;

6) If the treated gas concentration does not reach the minimum exhaust gas concentration emission standard set by the system, the intelligent control cabinet 10 will control the three-way electromagnetic switch valve 15 through the three-way electromagnetic switch valve 15 in front of the last exhaust port. The pipeline switch on the side of the gas discharged into the atmosphere is closed, so that the untreated gas that meets the standard is transported again through the pipeline to the front-end treatment equipment for further processing until the detection value of the rear exhaust gas concentration detection sensor 14 meets the concentration standard value set by the system. , the intelligent control cabinet 10 will control the three-way electromagnetic switch valve 15 to open the pipeline switch for discharging gas into the atmosphere. The rear exhaust gas concentration detection sensor 14 installed after the ozone filter 13 detects the gas, and the single-chip computer control system records this Gas composition, the next time the exhaust gas with the same composition is treated, the single-chip microcomputer control system in the intelligent control cabinet 10 controls the high-energy ultraviolet lamp group module 7 and the ozone supply module 8. The shape of each group of turned-on lamps is based on the corresponding concentration level. One-level arrangement ultimately achieves ultra-clean emissions after organic waste gas treatment.

As shown in Figures 2 and 3, in step 4), the high-energy ultraviolet lamp group module includes 4 groups, and the ozone supply module includes 3 groups. Each group of lamp groups includes 4 lamp tubes. The method of controlling the opening of the lamp tubes is:

When the exhaust gas concentration is 0-150 mg/m ³ ; in the high-energy ultraviolet lamp group module, only one lamp is turned on in each group, and the positions of the lamps turned on in all groups are different, and the whole group becomes "W" or "M"-shapedarrangement; in the ozone supply module, only the middle light tube in the first group and the third group is turned on, and the positions of the turned on light tubes are staggered;

When the exhaust gas concentration is 150-200 mg/m ³ , in the high-energy ultraviolet lamp group module, each group turns on 2 lamps, and the whole is arranged in a staggered manner of ">" and "<"; in the ozone supply module, turn on the first group and the For the 2 lamps in the second group, the position of the lamp that is turned on is ">" or "<";

When the exhaust gas concentration is 200-250 mg/m ³ , in the high-energy ultraviolet lamp module, the first and third groups of lamps are all turned on, and the second group and the fourth group are both turned on 2 lamps and the lamps are arranged in a staggered manner; In the ozone supply module, each group turns on 2 lamps, arranged in a staggered pattern of ">" and "<";

When the exhaust gas concentration is ^above 250mg/m3, all lamps in the high-energy ultraviolet lamp module are turned on; in the ozone supply module, all the lamps in the first group are turned on, and two lamps in the second and third groups are turned on. The second and third groups of lamps are arranged in a ">" or "<" shape. As shown in Figure 1, a TiO ₂ catalytic network is provided between the high-energy ultraviolet lamp module 5 and the ozone supply module 6. The TiO ₂ catalytic network 7 participates in the catalysis, and the organic waste gas is decomposed into CO ₂ , H ₂ O, Sulfur oxides, nitrogen oxides. Humidity affects the catalytic efficiency of the TiO ₂ catalytic network. The TiO ₂ surface is hydrophilic and strongly adsorbs water. When the water content increases, water molecules compete with toluene molecules for adsorption on the TiO ₂ surface, hindering the adsorption of toluene molecules on the active sites on the catalyst surface. , causing the surface reaction rate to decrease. Therefore, in this embodiment, the exhaust gas is dehumidified through the setting of a dehumidification filter. The entrance of the photooxygen cracking cabinet is equipped with a replaceable dust-proof and moisture filter. The induced draft fan is a negative pressure induced draft fan.

The above embodiments are only used to illustrate but not to limit the technical solutions of the present invention. Any modifications or partial substitutions that do not depart from the spirit of the present invention shall be included in the scope of the claims of the present invention.

Claims (1)

1. A tail gas photooxygen cracking treatment method based on volatile oil and gas purification technology, which is characterized by: It is implemented in an exhaust gas treatment device, which includes a cyclone defogger and dust reduction cooler (1), oil and gas purification electric field equipment (2), front-end spray tower (3), exhaust gas concentration detection sensor (4), photooxygen Cracking cabinet (5), dust-proof moisture filter (6), high-energy ultraviolet lamp module (7), ozone supply module (8), TiO ₂ catalytic network (9), single-chip microcomputer control system, negative pressure induced draft fan (11 ), dry flue gas comprehensive treatment tank (12), ozone filter (13); the air inlet and exhaust port of the cyclone demisting and dust reduction cooler (1), the factory exhaust port and the oil and gas purification electric field equipment (2) Connect respectively, the exhaust port of the oil and gas purification electric field equipment (2) is connected to the front-end spray tower (3), the front-end spray tower (3) and the photooxygen cracking cabinet (5) are connected through the air duct, and the exhaust gas concentration detection sensor (4) Installed at the entrance of the photooxygen cracking cabinet (5), the dust-proof moisture filter (6) is installed in the slot at the entrance of the photooxygen cracking cabinet (5), and the high-energy ultraviolet lamp module (7) is installed in a certain number and spacing In the photooxygen cracking cabinet (5), ozone supply modules (8) are installed in a certain number and spacing in the photooxygen cracking cabinet (5) and are at the back end of the high-energy ultraviolet lamp module (7), and the TiO ₂ catalytic network ( 9) Evenly installed between each high-energy ultraviolet lamp module (7) and each ozone supply module (8). The single-chip microcomputer control system is installed in the intelligent control cabinet of the photooxygen cracking cabinet (5). The negative pressure induced draft fan ( 11) Installed at the air outlet of the photooxygen cracking cabinet (5) and the air outlet of the negative pressure induced draft fan (11) is connected to the dry flue gas comprehensive treatment tank (12). In the dry flue gas comprehensive treatment tank (12) An ozone filter (13) is installed at the exhaust port. A rear exhaust gas concentration detection sensor (14) is installed behind the ozone filter (13). A three-way electromagnetic switch valve (14) is installed at the position before the last exhaust port. 15), the air pipe connected to the three-way electromagnetic switch valve (15) is connected to the side of the outlet pipe of the cyclone defogger and dust cooler (1). If the treated gas concentration does not meet the minimum exhaust gas concentration emission standard set by the system , the intelligent control cabinet (10) will control the three-way electromagnetic switch valve (15) to close the pipeline switch on the side where the gas is discharged into the atmosphere, so that the unprocessed gas that meets the standard is again transported to the front-end treatment equipment (4) through the pipeline. Process again, until the detection value of the rear exhaust gas concentration detection sensor (14) meets the concentration standard value set by the system, the intelligent control cabinet (10) will control the three-way electromagnetic switch valve (15) to open the pipeline switch for discharging gas into the atmosphere. , the single-chip microcomputer control system in the intelligent control cabinet (10) records the gas composition at the same time, and the next time the exhaust gas with the same composition is treated, the single-chip microcomputer control system in the intelligent control cabinet (10) controls the high-energy ultraviolet lamp module (7 ) and ozone supply module (8), the shape of each group of turned-on lamps is arranged according to the upper level of the corresponding concentration level, and so on, until the highest concentration level; The entrance of the photooxygen cracking cabinet is equipped with a replaceable dust-proof and moisture filter net; the TiO ₂ catalytic net is evenly distributed between the lamp module modules, and the TiO ₂ catalytic net participates in the catalysis, and the organic waste gas is decomposed into CO ₂ , H ₂ O, sulfur oxides, nitrogen oxides; the induced draft fan is a negative pressure induced draft fan; The tail gas photooxygen cracking treatment method based on volatile oil and gas purification technology includes the following steps: 1) The organic waste gas from the factory enters the cyclone demisting and dust-reducing cooler for demisting and dust reduction. The preliminary treated waste gas will be passed into the oil and gas purification electric field equipment; the oil and gas purification electric field equipment causes larger pollutant molecules and oil to be generated Decomposition, the -OH and -O active free radicals and O ₃ produced at the same time chemically react with harmful gas molecules, degrading pollutants with larger molecules into small molecular substances; 2) The organic waste gas after preliminary dust removal enters the front-end spray tower, and the front-end spray tower fixes the dust particles in the organic waste gas in the spray liquid through spraying; 3) The organic waste gas after dust removal enters the photo-oxygen cracking cabinet through the air duct. The organic waste gas passes through the dust-proof and moisture-proof filter at the entrance of the photo-oxygen cracking cabinet for further dust removal and moisture filtration. The high-energy ultraviolet lamp module breaks the chains of macromolecules of the organic waste gas. , the ozone supply module further oxidizes the small molecule waste gas after chain breakage; 4) During the processing in step 3), the exhaust gas concentration detection sensor installed at the entrance of the photooxygen cracking cabinet will detect the exhaust gas concentration in real time and feed the signal back to the microcontroller control system. The microcontroller control system will judge the corresponding concentration range based on the input signal and enable it. The self-optimized and designed control program controls the regular combination of on and off of the lamps in the high-energy ultraviolet lamp module and ozone supply module to achieve energy-saving and efficient treatment of organic waste gas; 5) The treated gas enters the dry flue gas comprehensive treatment tank under the action of the induced draft fan to achieve the fixation of sulfur and nitrogen oxides. An ozone filter is installed at the exhaust port of the dry flue gas comprehensive treatment tank. The network reduces the unconsumed ozone generated in the entire system to oxygen, ultimately achieving ultra-clean emissions after organic waste gas treatment; 6) If the treated gas concentration does not reach the minimum exhaust gas concentration emission standard set by the system, the intelligent control cabinet will control the three-way electromagnetic switch valve to discharge the gas through the three-way electromagnetic switch valve in front of the last exhaust port. The pipeline switch on the side entering the atmosphere is closed, so that the untreated gas that meets the standard is transported through the pipeline to the front-end processing equipment for further processing until the detection value of the rear exhaust gas concentration detection sensor meets the concentration standard value set by the system. The intelligent control cabinet controls the three-way electromagnetic switch valve to open the pipe switch for discharging gas into the atmosphere. The rear exhaust gas concentration detection sensor installed behind the ozone filter detects the gas. The single-chip microcomputer control system records the gas components. Next When exhaust gas with the same composition is treated at one time, the single-chip microcomputer control system in the intelligent control cabinet controls the high-energy ultraviolet lamp group module and the ozone supply module. The shape of each group of turned-on lamps is arranged according to the upper level of the corresponding concentration level, ultimately achieving organic Ultra-clean emissions after exhaust gas treatment; the described exhaust gas photooxygen cracking treatment method based on volatile oil and gas purification technology, the high-energy ultraviolet lamp group module and the ozone supply module lamp tube described in step 4) are turned on The layout follows the principle of spatial distribution uniformity; the high-energy ultraviolet lamp group module includes 4 groups, the ozone supply module includes 3 groups, each group of lamp groups contains 4 lamp tubes, and the method of controlling the opening of the lamp tubes is: When the exhaust gas concentration is 0-150 mg/m ³ ; in the high-energy ultraviolet lamp group module, only one lamp is turned on in each group, and the positions of the lamps turned on in all groups are different, forming a "W" or "M" type arrangement as a whole. Cloth; In the ozone supply module, only one lamp in the middle of the first group and the third group is turned on, and the positions of the turned on lamps are staggered; When the exhaust gas concentration is 150-200 mg/m ³ , in the high-energy ultraviolet lamp group module, each group turns on 2 lamps, and the whole is arranged in a staggered manner of ">" and "<"; in the ozone supply module, turn on the first group and the For the 2 lamps in the second group, the position of the lamp that is turned on is ">" or "<"; When the exhaust gas concentration is 200-250 mg/m ³ , in the high-energy ultraviolet lamp module, the first and third groups of lamps are all turned on, and the second group and the fourth group are both turned on 2 lamps and the lamps are arranged in a staggered manner; In the ozone supply module, each group turns on 2 lamps, arranged in a staggered pattern of ">" and "<"; When the exhaust gas concentration is ^above 250mg/m3, all lamps in the high-energy ultraviolet lamp module are turned on; in the ozone supply module, all the lamps in the first group are turned on, and two lamps in the second and third groups are turned on. The second and third groups of lamps are arranged in a ">" or "<" shape.