A method for synergistically treating wastewater tail gas and tank area tail gas of a BDO device

Abstract

The application discloses a kind of BDO device sewage tail gas and tank area tail gas collaborative management method, belong to waste gas treatment technical field, including the following steps: tank area waste gas and BDO sewage treatment area waste gas is fully mixed evenly, obtain mixed waste gas;The mixed waste gas is washed to remove solid particles and part of water-soluble components in waste gas;Mixed waste gas after washing is carried out demisting treatment, again after preheating by heat accumulating ceramic bed, into combustion chamber high-temperature oxidation and release heat;Hot air formed in the combustion chamber is discharged after heat exchange with heat accumulating ceramic bed, and heat accumulating ceramic bed after heat exchange is used to preheat mixed waste gas newly into combustion chamber.The BDO device sewage tail gas and tank area tail gas are introduced into GRTO device for collaborative management, reduce the emission point in factory area, and the high-concentration waste gas in tank area supplements the low-concentration waste gas in sewage treatment area, which is conducive to the safe operation of heat accumulating incinerator GRTO.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste gas treatment, in particular to a BDO device sewage tail gas and tank area tail gas synergistic treatment method. BACKGROUND

[0002] The tank area tail gas is mainly VOCs waste gas caused by the breathing of liquid in the tank area. The emission concentration varies with different tank forms, sealing forms, operating temperatures, operating pressures, seasons, and different breathing volumes, and the gas concentration presents high and low changes. The VOCs in the tank area is an oxygen-free waste gas, and the characteristics are small air volume and high concentration. At present, the tank area tail gas treatment mostly refers to oil gas recovery, and the condensation method is used for recovery and treatment. However, this method has the following defects: (1) Environmental protection: The VOCs emission standard of the coal chemical industry is becoming more and more stringent. The VOCs emission of the methanol tank area is irregular. When the tank breathes, the waste gas volume increases sharply in a short time. When the waste gas is transported to the condensation device, it cannot be cooled in time, and it penetrates the device instantly. Even if an adsorption tank is arranged at the back end, it cannot meet the VOCs emission standard requirements. The condensation device currently applied cannot meet the environmental emission requirements, with the emission concentration being about 400-1200 mg / m 3 , not reaching the theoretical recovery rate, and not reaching the preset economic benefits. In summary, the economic benefit of the oil gas recovery method for VOCs treatment is not obvious, and even the treated waste gas cannot meet the emission limit value. Therefore, oxidation is the only way to solve the treatment standard. However, the waste gas in the tank area is a typical small air volume and high concentration waste gas, which is not suitable for separate incineration oxidation treatment. SUMMARY

[0003] In view of the above problems, the present application proposes a method of introducing BDO device sewage tail gas and tank area tail gas into a GRTO device for synergistic treatment. The BDO (butanediol) device sewage area waste gas has the characteristics of large air volume and low concentration. At present, adsorption oxidation or direct oxidation is mostly used for standard treatment, and the technology is relatively mature. The GRTO (safety type heat storage incineration oxidation device) is a mainstream VOCs oxidation technology, which has the advantages of safety measure specification, complete safety control system, strict safety design, stable operation, high purification treatment efficiency, low one-time investment cost, low operation and maintenance cost, no secondary pollution, heat energy recovery for energy saving and consumption reduction, etc.

[0004] The purpose of the present application is achieved by the following technical scheme:

[0005] A BDO device sewage tail gas and tank area tail gas synergistic treatment method, comprising the following steps:

[0006] (1) fully mixing and uniformly the tank area waste gas and BDO sewage treatment area waste gas to obtain mixed waste gas;

[0007] (2) performing elution on the mixed waste gas to remove solid particulate matters and part of water-soluble components in the waste gas;

[0008] (3) performing mist removal treatment on the eluted mixed waste gas, and then preheating the mixed waste gas by the regenerative ceramic bed before entering the combustion chamber for high-temperature oxidation and heat release;

[0009] (4) discharging the hot air formed in the combustion chamber after heat exchange with the regenerative ceramic bed, and using the heat-exchanged regenerative ceramic bed to preheat the mixed waste gas newly entering the combustion chamber.

[0010] Another object of the present application is to provide a device based on the aforementioned treatment method, comprising a collection and air intake system, a pretreatment system, a heat exchange system and a discharge system connected in sequence; the collection and air intake system comprises a tank area waste gas intake pipe, a sewage treatment area waste gas intake pipe and a mixed air box connected with the tank area waste gas intake pipe and the sewage treatment area waste gas intake pipe respectively; the pretreatment system comprises a water washing tower and a mist eliminator connected with the waste gas outlet of the water washing tower, and the water washing tower is provided with a circulating water pump; the heat exchange system comprises a flame arrester, a GRTO main fan, a three-bed GRTO furnace and a high-temperature mixed air box in sequence, the three-bed GRTO furnace comprises a regenerative ceramic bed and a combustion chamber, the regenerative ceramic bed is connected with a purge fan, and the combustion chamber is connected with a natural gas intake tank and a combustion air fan respectively; the discharge system comprises a chimney; a shut-off valve is arranged between the pretreatment system and the heat exchange system; a check valve is arranged at the starting end of the pipeline of each system.

[0011] Preferably, an emergency emptying system connected with the collection and air intake system or the pretreatment system is further included, and the emergency emptying system comprises an activated carbon adsorption device and an emergency discharge chimney in sequence.

[0012] Preferably, an LEL online detection device is arranged at the outlet of the mixed air box, and two-stage alarm is provided, and when high alarm occurs, interlocking dilution is performed, and when high-high alarm occurs, the waste gas is switched to the emergency emptying system.

[0013] Preferably, the regenerative ceramic bed is filled with regular honeycomb ceramic regenerative bodies, and the preparation method of the honeycomb ceramic regenerative bodies comprises the following steps:

[0014] (a) polyvinylpyrrolidone is weighed and dissolved in a mixed solution of deionized water and ethanol, ultrasonic dispersion is performed until uniform, then zirconium oxychloride octahydrate is added, ultrasonic dispersion treatment is continued, then vigorous stirring reaction is performed at 30-35℃ for 1-2h, the precipitate is collected by centrifugation, washed with deionized water, freeze-dried, and then heat treated at 600-800℃ for 1-3h, and then cooled to obtain zirconia nanocrystals;

[0015] The volume ratio of deionized water to ethanol in the mixed solution is (1-2):(48-49); the mixing ratio of polyvinylpyrrolidone to the mixed solution is (1.1-1.2g):100mL; and the mixing ratio of polyvinylpyrrolidone to the zirconium oxychloride octahydrate is (13-15):1.

[0016] (b) respectively weighing silicon carbide powder, mullite, potassium feldspar and spodumene, proportioning and ball milling to obtain a mixture, adding a solid phase additive, the zirconia nanocrystal and a binder, stirring in a blender to obtain a slurry, adding a lubricant and water and stirring again to obtain a mud, and then forming a honeycomb ceramic body by an extrusion method, and then sintering after microwave drying and far infrared drying in sequence to obtain the honeycomb ceramic body.

[0017] The sintering procedure is as follows: increasing the temperature to 300℃ at a rate of 7-10℃ / min, keeping the temperature for 0.5h, continuously increasing the temperature to 500℃, keeping the temperature for 0.5h, continuously increasing the temperature to 700℃, keeping the temperature for 0.5h, reducing the temperature increasing rate to 3-5℃ / min, continuously increasing the temperature to 1000℃, keeping the temperature for 1h, continuously increasing the temperature to 1200℃, keeping the temperature for 1h, and continuously increasing the temperature to 1400℃, keeping the temperature for 2h.

[0018] Preferably, the mass mixing ratio of the silicon carbide powder, mullite, potassium feldspar and spodumene is 10:(3-5):(2-4):(1-1.5), and the mass ratio of the mixture to the solid phase additive, the zirconia nanocrystal, the binder and the lubricant is 10:(1-4):(0.3-1):(1-3):(0.5-3).

[0019] Preferably, the solid phase additive comprises modified aluminum nitride porous microspheres, and the preparation method of the modified aluminum nitride porous microspheres comprises the following steps:

[0020] S1, respectively weighing aluminum nitride powder and aluminum nitride whiskers, mixing and then adding t-butyl alcohol to prepare a slurry, adding yttrium oxide and polyvinyl butyral resin, and then sufficiently mixing and stirring to obtain a microsphere blank, freeze-drying, and then heating the microsphere blank to 1900-2000℃ under a nitrogen atmosphere and heat treating for 2-4h, self-cooling to 800-1000℃, switching the atmosphere to air and keeping the temperature for 1h to obtain aluminum nitride microspheres.

[0021] S2, the titanium nitride nanoparticles are weighed and dispersed in anhydrous ethanol, and after ultrasonic dispersion, a suspension is obtained, the aluminum nitride microspheres are immersed in the suspension for 1-10 min, taken out and dried, the operation of immersion-drying is repeated for 4-5 times, and finally heat treatment is carried out at 300-400 DEG C for 1-2 h, so that the modified aluminum nitride porous microspheres are prepared; the solid content in the suspension is 1-2 wt.%.

[0022] Preferably, the mass ratio of the aluminum nitride powder, the aluminum nitride whisker, the yttrium oxide and the polyvinyl butyral resin is 10: (4-5): (0.4-0.7): (0.2-0.5).

[0023] Preferably, the specification of the honeycomb ceramic regenerator is 150*100*100 mm, the cell width is 3.5 mm, the cell type is square, hexagonal or circular, and the porosity is 60-67%.

[0024] The beneficial effects of the present application are:

[0025] (1) The present application introduces the BDO device sewage tail gas and tank area tail gas into the GRTO device for collaborative management, reduces the emission point in the plant area, and the high-concentration waste gas in the tank area supplements the low-concentration waste gas in the sewage treatment area, which is beneficial to the safe operation of the regenerative incinerator GRTO, and the concentration reaches a certain concentration, so that the GRTO does not need to be supplemented with fuel, effectively reduces carbon emissions, and since the condensing device in the tank area mainly undertakes the task of reducing the concentration of waste gas below the lower limit of explosion, it is not necessary to directly condense to the standard concentration, so the investment will be greatly reduced, and at the same time, the on-site emission of non-standard medium and high-concentration waste gas after condensation in the tank area is avoided, the risk source in the tank area is eliminated, and the monitoring points and explosion hazards are reduced; compared with the large air volume in the sewage treatment area, the air volume sent by the tank area is not more than 5%, which has little effect on the operation and investment of the device, and at the same time, a perfect risk prevention and disposal system is provided, which can eliminate safety hazards in time and ensure the safe and stable operation of the system; (2) The heat storage body is a heat exchange component of the heat storage oxidation furnace, and the material and structure thereof are crucial to the thermal characteristics. When selecting the material of the heat storage body, the influences of corrosion resistance, density, specific heat capacity, convective heat transfer coefficient, and thermal expansion coefficient on heat transfer performance and thermal shock resistance are comprehensively considered. In order to improve the comprehensive performance of the heat storage body, the present application introduces zirconia ultra-fine nanocrystals into the ceramic material by liquid phase method on the basis of the existing mullite-silicon carbide heat storage material, which greatly improves the mechanical strength, elasticity and toughness of the honeycomb ceramic, greatly improves the thermal shock resistance of the heat storage ceramic, has excellent heat exchange stability under high and low temperature cycles, and further prolongs the service life; further, the present application adds a solid phase additive on the basis of the existing mullite-silicon carbide heat storage material, improves the heat storage efficiency while maintaining the thermal shock resistance of the heat storage ceramic, and specifically, the present application uses porous aluminum nitride as a matrix microsphere, modifies titanium nitride nanoparticles on the surface, establishes a heat conduction and heat storage system with aluminum nitride and titanium nitride as a crosslinked framework in the sintering system, improves the heat conduction and heat exchange efficiency, and at the same time, utilizes the porosity to reduce the influence of the additive on the mechanical properties of the ceramic, and reduces the thermal expansion coefficient. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application is further illustrated by the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the following drawings.

[0027] Figure 1 is a schematic diagram of the connecting structure of the device according to embodiment 1 of the present application.

[0028] Reference signs: 1 - natural gas inlet tank; 2 - tank area waste gas inlet tank; 3 - sewage treatment area waste gas inlet tank; 4 - air mixing box; 5 - LEL online detection device; 6 - water washing tower; 7 - circulating water pump; 8 - demister; 9 - flame arrester; 10 - GRTO main fan; 11 - purging fan; 12 - regenerative ceramic bed; 13 - three-bed GRTO furnace; 14 - combustion chamber; 15 - high-temperature air mixing box; 16 - emergency activated carbon tank; 17 - emergency discharge chimney; 18 - chimney; 19 - combustion air fan. DETAILED DESCRIPTION

[0029] The application will be further described in conjunction with the following examples.

[0030] Example 1

[0031] This example relates to a method for co-treatment of BDO plant sewage tail gas and tank area tail gas, comprising the following steps:

[0032] (1) mixing the tank area waste gas and the BDO sewage treatment area waste gas evenly to obtain mixed waste gas;

[0033] (2) washing the mixed waste gas to remove solid particles and part of water-soluble components in the waste gas;

[0034] (3) carrying out demisting treatment on the mixed waste gas after washing, and then preheating by a regenerative ceramic bed before entering a combustion chamber for high-temperature oxidation and heat release;

[0035] (4) discharging the hot air formed in the combustion chamber after heat exchange with the regenerative ceramic bed, and using the regenerative ceramic bed after heat exchange to preheat the mixed waste gas entering the combustion chamber;

[0036] Specifically, it is realized by designing corresponding treatment devices, referring to the attached drawings. Figure 1The device comprises a collection air intake system, a pretreatment system, a heat exchange system and a discharge system connected in sequence; the collection air intake system comprises a tank area waste gas intake tank 3 and its pipeline, a sewage treatment area waste gas intake tank 3 and its pipeline, and a mixed air box 4 connected with the tank area waste gas intake pipe and the sewage treatment area waste gas intake pipe respectively; the pretreatment system comprises a water washing tower 6 and a demister 8 connected with the waste gas outlet of the water washing tower 6, so as to remove solid particulate matters and part of water-soluble components in the waste gas, reduce the concentration of related pollutant components, ensure the normal and stable operation of the rear-end equipment, and reduce the loss in safety accidents by arranging a bursting disc in the water washing tower 6; the water washing tower 6 is provided with a circulating water pump 7; the heat exchange system comprises, in sequence, a flame arrester 9, a GRTO main fan 10, a three-bed GRTO furnace 13 and a high-temperature mixed air box 15; the three-bed GRTO furnace 13 comprises a heat storage ceramic bed 12 and a combustion chamber 14, the heat storage ceramic bed 12 is connected with a purge fan 11, and the combustion chamber 14 is connected with a natural gas intake tank and a combustion air fan 19 respectively; the discharge system comprises a chimney 18; a cut-off valve (not marked) is arranged between the pretreatment system and the heat exchange system; the starting end of each system conveying pipeline is provided with a check valve (not marked) to prevent mutual air leakage;

[0037] The high-concentration waste gas in the tank area and the low-concentration waste gas in the sewage treatment area are respectively introduced into the mixed air box 4 through independent pipeline collection systems to be fully mixed and uniform, the peak of the high-concentration gas is eliminated, the gas enters the GRTO device more stably, the stable operation of the device is ensured, the pressure of the waste gas entering the mixed air box 4 is slightly positive (>200pa), each pipeline needs to be conveyed to the mixed air box 4, and the pressure balance will not cause the working condition of air return of a certain pipeline;

[0038] The uniform and stable waste gas enters the GRTO heat storage ceramic bed 12 under the action of the GRTO main fan 10, the waste gas is preheated by the honeycomb ceramic heat storage body and then enters the combustion chamber 14, the VOCs are oxidized at high temperature in the combustion chamber 14 and release heat, the hot air exchanges heat with the ceramic of the other heat storage ceramic bed during the discharge process, the ceramic accumulates heat to preheat the newly entering waste gas, so as to reduce the consumption of auxiliary fuel, the direction of the waste gas entering the ceramic is changed through the switching of the pneumatic valves at the bottom of different heat storage ceramic bed layers, the alternate conversion of the heat storage area and the heat release area is realized, and the GRTO continuously and stably operates; the main components of the low-temperature waste gas discharged by the GRTO (generally not more than 100℃) are carbon dioxide and water generated by the high-temperature decomposition of VOCs in the oxidation chamber, which can meet the requirements of related emission standards;

[0039] The device further comprises an emergency emptying system connected with the collection air intake system or the pretreatment system, the emergency emptying system comprises an emergency activated carbon tank 16 and an emergency discharge chimney 17;

[0040] The emergency emptying system is generally arranged on the main pipeline (or each collecting pipeline branch) after the pretreatment water washing tower 6, to ensure that the emergency exhaust waste gas is discharged after being treated to reach the standard, and the related valves and detection instruments are interlocked and controlled through the corresponding intelligent control system. In the event of equipment failure, maintenance, emergency shutdown and other unexpected conditions, the emergency emptying system is entered for exhaust;

[0041] The LEL online detection device 5 is arranged at the outlet of the air mixing box 4, the inlet waste gas concentration of the GRTO is strictly controlled to be not more than 25% LEL, and two levels of alarms are provided. When the high alarm is given, the dilution is interlocked; when the high-high alarm is given, the waste gas is switched to the emergency emptying system.

[0042] The heat storage ceramic bed 12 is filled with regular honeycomb ceramic heat storage bodies. The specifications of the honeycomb ceramic heat storage bodies (RTO) are 150*100*100mm, the cell width is 3.5mm, the cell type is square, and the porosity is 60-67%.

[0043] Example 2

[0044] This embodiment relates to a BDO device sewage exhaust gas and tank area exhaust gas collaborative treatment device. The device is the same as that in Example 1, and the difference lies in that the heat storage ceramic bed is filled with regular honeycomb ceramic heat storage bodies. The preparation method of the honeycomb ceramic heat storage bodies comprises the following steps:

[0045] (a) Polyvinylpyrrolidone is weighed and dissolved in a mixed solution of deionized water and ethanol. After ultrasonic dispersion, zirconium oxychloride octahydrate is added, and ultrasonic dispersion treatment is continued. Then, the mixture is stirred vigorously at 35℃ for 1h, and the precipitate is collected by centrifugation, washed with deionized water, freeze-dried, and heat-treated at 650℃ for 2h. After cooling, zirconium oxide nanocrystals are prepared;

[0046] In the mixed solution, the volume ratio of deionized water to ethanol is 1:49. The mixing ratio of polyvinylpyrrolidone to the mixed solution is 1.16g:100mL. The mixing ratio of polyvinylpyrrolidone to zirconium oxychloride octahydrate is 14:1.

[0047] (b) Silicon carbide powder, mullite, potassium feldspar and spodumene are weighed and ball milled to be uniform, respectively, to obtain a mixture. Solid phase additives, zirconium oxide nanocrystals and a binder are added, and the mixture is stirred in a blender until uniform. Lubricant and water are added and stirred again until uniform to prepare a clay material. The honeycomb ceramic body is formed by extrusion, and is dried by microwave and far infrared drying in sequence, and is then fired to obtain the honeycomb ceramic body.

[0048] The solid phase additive is active alumina, the binder is polyvinyl butyral resin, and the lubricant is tung oil; the mass mixing ratio of the silicon carbide powder, mullite, potassium feldspar and spodumene is 10:3.5:2.6:1.2, and the mass ratio of the mixture to the active alumina, the zirconium oxide nanocrystal, the polyvinyl butyral resin and the tung oil is 10:2.4:0.5:2.1:0.9; the firing procedure is as follows: heating to 300℃ at 8℃ / min, holding for 0.5h, continuously heating to 500℃, holding for 0.5h, continuously heating to 700℃, holding for 0.5h, reducing the heating rate to 5℃ / min, continuously heating to 1000℃, holding for 1h, continuously heating to 1200℃, holding for 1h, continuously heating to 1400℃, holding for 2h.

[0049] Example 3

[0050] This example relates to a BDO device sewage tail gas and tank area tail gas synergistic treatment device, the device is the same as example 2, the difference is that the zirconium oxide nanocrystal is replaced by commercial monoclinic phase nano zirconium dioxide (200 nm, Beijing Deke Island gold).

[0051] Example 4

[0052] This example relates to a BDO device sewage tail gas and tank area tail gas synergistic treatment device, the device is the same as example 2, the difference is that the solid phase additive is modified aluminum nitride porous microspheres, and the preparation method of the modified aluminum nitride porous microspheres comprises the following steps:

[0053] S1, respectively, take the aluminum nitride powder and the aluminum nitride whisker, mix and add t-butyl alcohol to prepare a slurry, add yttrium oxide and polyvinyl butyral resin, fully mix and stir uniformly to form a microsphere embryo, freeze-dry, and then heat the microsphere embryo to 1950℃ under nitrogen atmosphere and heat treat for 3h, cool to 800℃, switch the atmosphere to air and heat treat for 1h to obtain aluminum nitride microspheres;

[0054] The mass ratio of the aluminum nitride powder to the aluminum nitride whisker, the yttrium oxide and the polyvinyl butyral resin is 10:4.2:0.48:0.3;

[0055] S2, take the titanium nitride nanoparticles and disperse them in anhydrous ethanol, the dispersion concentration is 1wt.%, ultrasonic dispersion is uniform, then immerse the aluminum nitride microspheres in the suspension for 10min, take out and dry, repeat the immersion-drying operation for 4 times, and finally heat treat at 350℃ for 1h to obtain the modified aluminum nitride porous microspheres.

[0056] Experimental example

[0057] The thermal properties of the honeycomb ceramic heat storage materials described in Examples 1-4 were measured, and the results are as follows:

[0058]

[0059] Application Example

[0060] The BDO device sewage tail gas and tank area tail gas co-treatment technology described in Example 4 has been applied in a certain company of PetroChina in Jilin. The system was put into use in December 2020 and has been safely and stably operated for more than a year. The monitoring data after one month of stable operation are shown in the following table, and all detection items meet the emission standards. After half a year of stable operation, the online monitoring data of non-methane total hydrocarbons are shown below, all of which maintain a low emission concentration and meet the standards.

[0061]

[0062] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the scope of protection of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A BDO plant wastewater tail gas and tank area tail gas co-treatment device, characterized in that, The system comprises sequentially connected collecting air intake system, pretreatment system, heat exchange system and exhaust system; the collecting air intake system comprises tank area exhaust gas intake pipe, sewage treatment area exhaust gas intake pipe and air mixing box connected with the tank area exhaust gas intake pipe and the sewage treatment area exhaust gas intake pipe respectively; the pretreatment system comprises water washing tower and demister connected with the exhaust gas outlet of the water washing tower, and the water washing tower is provided with circulating water pump; the heat exchange system comprises sequentially connected flame arrester, GRTO main fan, three-bed GRTO furnace and high-temperature air mixing box, the three-bed GRTO furnace comprises heat storage ceramic bed and combustion chamber, the heat storage ceramic bed is connected with purging fan, and the combustion chamber is connected with natural gas intake tank and combustion air fan respectively; the exhaust system comprises chimney; the pretreatment system and the heat exchange system are provided with cut-off valve; the starting end of each system conveying pipeline is provided with check valve; The heat storage ceramic bed is filled with regular honeycomb ceramic heat storage body, and the preparation method of the honeycomb ceramic heat storage body comprises the following steps: (a) polyvinylpyrrolidone is weighed and dissolved in a mixed solution of deionized water and ethanol, after ultrasonic dispersion, zirconium oxychloride octahydrate is added, ultrasonic dispersion treatment is continued, then 1-2 h of reaction is carried out under 30-35 DEG C with vigorous stirring, the precipitate is collected by centrifugation, washed with deionized water, freeze-dried, and then heat treated at 600-800 DEG C for 1-3 h, and cooled to obtain zirconia nanocrystals; In the mixed solution, the volume ratio of deionized water to ethanol is (1-2) : (48-49); the mixing ratio of polyvinylpyrrolidone to the mixed solution is (1.1-1.2 g) : 100 mL; the mixing ratio of polyvinylpyrrolidone to zirconium oxychloride octahydrate is (13-15) : 1; (b) silicon carbide powder, mullite, potassium feldspar and spodumene are weighed respectively, mixed and ball milled to obtain a mixture, solid phase additives, zirconia nanocrystals and a binder are added, and the mixture is stirred in a blender until uniform, a lubricant and water are added and stirred again until uniform, a paste is prepared, a honeycomb ceramic body is formed by extrusion, and then the honeycomb ceramic body is dried by microwave and far infrared drying in sequence, and then fired; The firing program is as follows: the temperature is raised to 300 DEG C at a rate of 7-10 DEG C / min, kept for 0.5 h, then raised to 500 DEG C, kept for 0.5 h, then raised to 700 DEG C, kept for 0.5 h, then the temperature is raised to 1000 DEG C at a rate of 3-5 DEG C / min, kept for 1 h, then raised to 1200 DEG C, kept for 1 h, then raised to 1400 DEG C, kept for 2 h; The mass mixing ratio of the silicon carbide powder, mullite, potassium feldspar and spodumene is 10: (3-5) : (2-4) : (1-1.5), and the mass ratio of the mixture to the solid phase additives, zirconia nanocrystals, binder and lubricant is 10: (1-4) : (0.3-1) : (1-3) : (0.5-3); The preparation method of the modified aluminum nitride porous microspheres comprises the following steps: S1, respectively, take the aluminum nitride powder and aluminum nitride whisker, mixed with tert-butyl alcohol to prepare a slurry, adding yttria and polyvinyl butyral resin, fully mixed and stirred uniformly, then shaped to obtain microsphere blank, freeze-dried, then heated to 1900-2000℃ under nitrogen atmosphere and heat treated for 2-4h, self-cooled to 800-1000℃, the atmosphere is switched to air and heat treated for 1h, to obtain the aluminum nitride microspheres; S2, take the titanium nitride nanoparticles and disperse them in anhydrous ethanol, ultrasonic dispersion to obtain a suspension, immerse the aluminum nitride microspheres in the suspension for 1-10min, take out and dry, repeat the immersion-drying operation 4-5 times, and finally heat treat at 300-400℃ for 1-2h to obtain the modified aluminum nitride porous microspheres; the solid content in the suspension is 1-2wt.%. The mass ratio of the aluminum nitride powder to the aluminum nitride whisker, the yttria, the polyvinyl butyral resin is 10: (4-5): (0.4-0.7): (0.2-0.5).

2. The BDO device sewage tail gas and tank area tail gas synergistic treatment device according to claim 1, characterized in that, It also includes an emergency exhaust system connected to the collection intake system or the pretreatment system, which in turn includes an activated carbon adsorption device and an emergency exhaust chimney.

3. The BDO device sewage tail gas and tank area tail gas synergistic treatment device according to claim 2, characterized in that, The outlet of the air mixing box is provided with an LEL online detection device, and two-stage alarm is provided, when high alarm occurs, interlocking dilution is performed, and when high-high alarm occurs, the exhaust gas is switched to the emergency exhaust system.

4. The BDO device sewage tail gas and tank area tail gas synergistic treatment device according to claim 1, characterized in that, The specification of the honeycomb ceramic regenerator is 150x100x100mm, the cell width is 3.5mm, the cell type is square, hexagonal or circular, and the porosity is 60-67%.

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