Tail gas treatment device for chemical safety production

Abstract

The invention relates to the technical field of tail gas treatment, in particular to a chemical safety production tail gas treatment device which comprises a treatment rack, a vertical supporting frame and a transverse supporting frame, a multi-stage filtering and purifying unit is erected on the vertical supporting frame and comprises an inlet gas filtering hopper, a purifying machine barrel and a diffusion type drying hopper; a gas mixing pipeline is connected to the outside of the inlet gas filtering hopper, and tail gas enters the purifying machine barrel through a purifying conveying pipeline after being filtered, and is input into the diffusion type drying hopper for moisture removal after being subjected to adsorption treatment. The output end of the drying hopper is connected with a gas conveying box which is installed on the transverse supporting frame, and the output end of the gas conveying box is connected with the flow dividing machine box. A flow dividing and purifying unit is erected on the transverse supporting frame and comprises a flow dividing machine box and a plurality of terminal purifying machine boxes, and dry gas is distributed to the flow dividing machine box through a gas conveying box and then evenly conveyed to all the terminal purifying machine boxes to be subjected to deep purifying treatment. According to the device, efficient and safe treatment of the chemical tail gas is realized through multi-stage collaborative purification and intelligent control.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment, in particular to a chemical production safety tail gas treatment device. Background Art

[0002] In the chemical production process, tail gas emissions often contain complex pollutants such as volatile organic compounds (VOCs), sulfides, nitrogen oxides and particulate matter. Their composition fluctuates greatly, they are highly toxic and some substances are difficult to degrade (such as chlorinated hydrocarbons and polycyclic aromatic hydrocarbons). Traditional tail gas treatment technologies such as spray absorption, activated carbon adsorption or single photocatalytic oxidation have significant limitations:

[0003] Such single photocatalytic oxidation treatment devices in the prior art are limited by the problems of fast recombination rate of photogenerated carriers and low ozone utilization rate, and the mineralization rate of stubborn pollutants is usually less than 60%. In addition, the series units operate independently and lack a synergistic mechanism, resulting in high pressure loss, high energy consumption, and poor adaptability to fluctuating exhaust gas. Summary of the invention

[0004] The purpose of the present invention is to provide a chemical production safety tail gas treatment device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A chemical production safety tail gas treatment device comprises a treatment frame and a vertical support frame and a horizontal support frame installed on the treatment frame; a multi-stage filtering and purifying unit is mounted on the vertical support frame, and a shunt purifying unit is mounted on the lateral support frame; the multi-stage filtering and purifying unit comprises an air inlet filter bucket, a purifying barrel and a diffusion drying bucket, the air inlet filter bucket is mounted on the treatment frame and is externally connected to an air inlet mixing pipeline, the diffusion drying bucket is mounted on the top of the vertical support frame and a purifying barrel is arranged at the input end, a purifying transmission pipeline is arranged at the output end of the air inlet filter bucket, and the purifying transmission pipeline is connected to the purifying barrel; the output end of the diffusion drying bucket is connected to a gas transmission box, and the gas transmission box is mounted on the horizontal support frame, the shunt purifying unit comprises a shunt chassis and a plurality of terminal purifying chassis installed on the shunt chassis, and the output end of the gas transmission box is connected to the shunt chassis.

[0007] As a further solution of the present invention: the air intake mixing pipeline includes an inlet pipe and a circulation pipe connected in series, the inlet pipe is provided with a flow valve, the circulation pipe is provided with a booster pump, and a quick cooling barrel is arranged at the connection between the two; the output end of the quick cooling barrel divides the gas into a main airflow and a circulating airflow through the circulation pipe, and the circulating airflow is pressurized by the booster pump and mixed with the main airflow to form turbulence.

[0008] As a further solution of the present invention: The main body of the air inlet filter hopper is a filter cylinder, and a composite filter material is arranged inside the filter cylinder. A reverse flusher is arranged at the bottom of the filter cylinder, and a reverse flush pump is externally connected to the reverse flusher. The output end of the reverse flusher is connected to a purification transmission pipeline through an air flow filter, and the purification transmission pipeline leads into a purification machine cylinder.

[0009] As a further solution of the present invention: The purification machine cylinder includes an adsorption machine cylinder and a filtrate machine cylinder. An access component is arranged at the input end of the cylinder body of the adsorption machine cylinder. The access component is connected to the purification transmission pipeline and is provided with an adsorption liquid interface. The output end of the adsorption machine cylinder is butted against the filtrate machine cylinder. The filtrate machine cylinder is connected to a diffusion drying hopper upward through a filtrate cylinder. An adsorption liquid filter pump is arranged at the bottom of the filtrate cylinder, and a discharge cylinder is externally connected to the adsorption liquid filter pump.

[0010] As a further solution of the present invention: A driving roller and spiral mixing blades mounted on the driving roller are arranged in the inner cavity of the cylinder body of the adsorption machine cylinder. A driver for driving the driving roller is arranged at the outer end of the cylinder body of the adsorption machine cylinder. A turnover port for butting against the filtrate machine cylinder is arranged on the side wall of the adsorption machine cylinder.

[0011] As a further solution of the present invention: The diffusion drying hopper includes an output frame, a drying hopper main body, and a drainage cylinder. The output frame, the drying hopper main body, and the drainage cylinder are combined into an integrated hopper structure. The drainage cylinder is located at the input end of the diffusion drying hopper and is connected to the filtrate cylinder.

[0012] As a further solution of the present invention: A drainage cylinder is arranged between the output frame and the drying hopper main body. A driving machine box is installed on the drainage cylinder. A driving motor is arranged inside the driving machine box. A spiral frame is installed at the driving end of the driving motor. The spiral frame extends spirally in the inner cavity of the drying hopper main body.

[0013] As a further solution of the present invention: The air delivery box includes a collection frame butted against the output frame, a buffer section installed on the collection frame, and a turnover compartment arranged at the bottom of the buffer section.

[0014] As a further solution of the present invention: The shunt chassis includes a separation cylinder. A shunt pump and several branch pumps are arranged on the separation cylinder. The shunt pump is connected to the turnover compartment through a pipeline.

[0015] As a further solution of the present invention: The terminal purification chassis includes several secondary purification compartments. The shunt pump and the separation cylinder are both installed on the top of the corresponding secondary purification compartment. An ozone generator is arranged at the rear side of the box body of the secondary purification compartment. A purification section is arranged in each secondary purification compartment. An ultraviolet panel is arranged in the purification section.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. Design a multi - level collaborative purification architecture to form a five - level linkage operation process of "filtration - adsorption - drying - shunt - terminal purification", achieving full - chain coverage from particulate matter interception to in - depth treatment of gaseous pollutants.

[0018] 2. The inlet gas mixing pipeline integrates a rapid cooling cylinder. By rapid cooling, the tail gas is cooled below the dew point to forcibly condense and separate water vapor and some VOCs. At the same time, a turnover pipe loop driven by a booster pump is set up, and turbulent mixing is used to enhance gas - liquid homogenization and reduce the subsequent treatment load.

[0019] 3. The inlet gas filter hopper is equipped with a reverse flusher and a reverse flush pump. By triggering high - pressure pulse injection or swirl impact through a pressure difference threshold, the particulate matter attached to the inner wall of the filter cartridge is automatically removed to avoid blockage.

[0020] 4. The purification cylinder is provided with spiral mixing blades. By slow stirring, the contact area between the adsorption liquid and the tail gas is increased to promote the neutralization reaction of acidic gases / VOCs. After adsorption, the gas - liquid mixture forms gravity sedimentation separation through the conical bottom of the filtrate cylinder, and the adsorption liquid is directionally discharged by the filtrate pump to achieve continuous gas - liquid separation.

[0021] 5. The terminal chassis integrates an ozone generator and an ultraviolet panel loaded with nano - titanium dioxide. Through synergistic catalysis, hydroxyl radicals are generated to complete the ultimate degradation of pollutants.

[0022] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit this application. Brief Description of the Drawings

[0023] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with this application, and are used together with the specification to explain the principles of this application. At the same time, these drawings and the text description are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments.

[0024] Figure 1 It is a schematic diagram of the overall structure of the tail gas treatment device for chemical industrial safety production provided by the embodiment of the present invention.

[0025] Figure 2 It is a schematic diagram of the structure of the multi - level filtration and purification unit provided by the embodiment of the present invention.

[0026] Figure 3 It is a schematic diagram of the structure of the inlet gas mixing pipeline provided by the embodiment of the present invention.

[0027] Figure 4 It is a schematic diagram of the structure of the inlet gas filter hopper provided by the embodiment of the present invention.

[0028] Figure 5This is a schematic structural diagram of a purification barrel and a diffusion dryer provided by an embodiment of the present invention.

[0029] Figure 6 This is a schematic side - view sectional diagram of a purification barrel and a diffusion dryer provided by an embodiment of the present invention.

[0030] Figure 7 This is a schematic structural diagram of a shunt purification unit in the present invention.

[0031] In the figure: 11, processing frame; 12, vertical support frame; 13, horizontal support frame; 21, air - inlet mixing pipeline; 22, air - inlet filter hopper; 23, purification transmission pipeline; 24, purification barrel; 25, diffusion dryer; 26, air - delivery box; 31, shunt chassis; 32, terminal purification chassis; 211, inlet pipe; 212, turnover pipe; 213, flow valve; 214, quick - cooling barrel; 215, booster pump; 221, filter cartridge; 222, back - flushing device; 223, back - flushing pump; 224, air - flow filter; 241, adsorption barrel; 242, filtrate barrel; 243, filtrate cylinder; 2431, adsorption liquid filter - out pump; 2432, discharge cylinder; 244, access component; 245, driver; 246, driving roller; 247, spiral mixing blade; 248, turnover port; 249, adsorption liquid interface; 251, output frame; 252, dryer main body; 253, drainage barrel; 254, drive machine box; 255, drive motor; 256, spiral frame; 261, collection frame; 262, buffer section; 263, turnover compartment; 311, shunt pump; 312, branch pump; 313, separation barrel; 321, ozone generator; 322, secondary purification compartment; 323, purification section; 324, ultraviolet panel. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention, and the examples are shown in the drawings. When the following description involves the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0033] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0034] The following describes the specific implementation of the present invention in detail with specific embodiments.

[0035] In one embodiment, please refer to Figure 1 and Figure 2A chemical production safety tail gas treatment device comprises a treatment frame 11 and a vertical support frame 12 and a horizontal support frame 13 installed on the treatment frame 11; a multi-stage filtering and purifying unit is mounted on the vertical support frame 12, and a diversion purifying unit is mounted on the horizontal support frame 13; the multi-stage filtering and purifying unit comprises an air inlet filter 22, a purifying barrel 24 and a diffusion drying hopper 25, the air inlet filter hopper 22 is installed on the treatment frame 11 and is externally connected to an air inlet mixing pipeline 21, and the diffusion drying hopper 25 is erected on the top of the vertical support frame 12 and a purification barrel 24 is arranged at the input end, and a purification transmission pipeline 23 is arranged at the output end of the air inlet filter bucket 22, and the purification transmission pipeline 23 is connected to the purification barrel 24; the output end of the diffusion drying bucket 25 is connected to the air delivery box 26, and the air delivery box 26 is installed on the horizontal support frame 13. The diversion purification unit includes a diversion chassis 31 and a plurality of terminal purification chassis 32 installed on the diversion chassis 31, and the output end of the air delivery box 26 is connected to the diversion chassis 31.

[0036] In this embodiment, the input and preliminary filtering process of the tail gas is first performed. The chemical tail gas enters the air inlet filter 22 through the external air inlet mixing pipeline 21. The large particle impurities (such as dust and droplets) entrained in the tail gas are removed by physical interception or gravity sedimentation to complete the first-level purification. The gas after preliminary filtration is transported to the purification barrel 24 through the purification transmission pipeline 23, and the gaseous pollutants (such as volatile organic compounds, sulfides, nitrogen oxides, etc.) are removed by adsorption, catalytic reaction or chemical absorption through the filter material filled inside. The purified gas then enters the diffusion drying hopper 25 to remove the residual moisture in the gas to avoid subsequent equipment corrosion or reduced processing efficiency. Finally, the gas diversion and terminal purification process are performed. The dried gas is distributed to the diversion chassis 31 through the gas transmission box 26, and then evenly distributed to multiple terminal purification chassis 32 by the diversion chassis 31. The terminal purification chassis 32 can be customized according to the tail gas composition (such as adding specific adsorbents, photocatalytic modules), and the gas is deeply processed to ensure that the emission meets the standards.

[0037] This embodiment designs a multi-stage collaborative purification mechanism, through the mechanical interception of the air inlet filter 22, the adsorption / chemical reaction of the purification barrel 24 and the deep treatment of the terminal purification chassis 32, physical filtration → chemical adsorption → catalytic reaction, forming a gradient purification system to reduce the concentration of pollutants step by step. The turbulent diffusion effect of the gas in the diffusion drying hopper 25 is used to increase the gas-liquid contact area and achieve efficient dehydration. The combination of multi-stage filtration and terminal diversion can simultaneously process particulate matter, gaseous pollutants and moisture, adapt to complex chemical tail gas components, and the emission indicators are better than national standards. The terminal purification chassis 32 can be flexibly configured according to the tail gas composition to meet the needs of different working conditions.

[0038] For example 2, please refer to Figure 2 andFigure 3 , based on the content described in the above embodiments, for the specific implementation structure of the air intake mixing pipeline 21, the design of this embodiment is as follows:

[0039] The air intake mixing pipeline 21 includes an inlet pipe 211 and a turnover pipe 212. A flow valve 213 is installed on the inlet pipe 211, and a booster pump 215 is installed on the turnover pipe 212. The inlet pipe 211 and the turnover pipe 212 are connected and provided with a rapid cooling barrel 214. The flow valve 213 is arranged at the inlet end of the rapid cooling barrel 214, and the booster pump 215 is arranged at the output end of the rapid cooling barrel 214. The terminal of the turnover pipe 212 is connected into the air intake filter hopper 22.

[0040] In this embodiment, it is designed that the chemical tail gas enters the system through the inlet pipe 211. The flow valve 213 adjusts the gas flow rate in real time according to the treatment requirements, preventing overload and ensuring the stable operation of the subsequent treatment units. The adjusted gas enters the rapid cooling barrel 214 and is quickly cooled below the dew point through the built-in quenching device (such as a shell-and-tube heat exchanger or a spray cooler). The low temperature also condenses the water vapor and some volatile organic compounds (VOCs) in the tail gas into liquid droplets, realizing gas-liquid separation, which is beneficial to the subsequent adsorption and drying treatments.

[0041] The condensed gas is divided into two paths. The main gas flow directly enters the turnover pipe 212 and forms a high-pressure gas flow after being pressurized by the booster pump 215. A small amount of gas flows back through the turnover pipe 212 and mixes with the main gas flow. Using the turbulence effect generated by the booster pump 215 can promote gas homogenization.

[0042] Embodiment Three, please refer to Figure 2 and Figure 4 , based on the content described in the above embodiments, for the specific implementation structure of the air intake filter hopper 22, the design of this embodiment is as follows:

[0043] The main body of the air intake filter hopper 22 is a filter cylinder 221. A backflusher 222 is arranged at the bottom of the filter cylinder 221. The backflusher 222 is externally connected with a backflush pump 223. The output end of the backflusher 222 is connected with a purification transmission pipeline 23 through an air flow filter 224, and the purification transmission pipeline 23 leads into a purification cylinder 24.

[0044] The chemical tail gas first enters the filter cylinder 221 of the air intake filter hopper 22. The filter cylinder 221 intercepts the particulate matters (such as dust and catalyst debris) in the tail gas through the internal filter materials (such as metal filter screens, sintered felts or porous ceramics), completing the primary mechanical filtration. When the pressure difference on both sides of the filter cylinder 221 reaches the set threshold, the backflush pump 223 is started, and high-pressure gas (such as compressed air) is injected into the backflusher 222. The backflusher 222 makes the particulate matters attached to the inner wall of the filter cylinder 221 fall off through pulse jetting or swirling impact, and the fallen particulate matters are deposited at the bottom of the filter hopper.

[0045] Example 4. Please refer to Figure 2 、 Figure 5 and Figure 6 . Based on the content described in the above embodiments, for the specific implementation structure of the purification barrel 24, this embodiment is designed as follows:

[0046] The purification barrel 24 includes an adsorption barrel 241 and a filtrate barrel 242. An access part 244 is arranged at the input end of the barrel body of the adsorption barrel 241. The access part 244 is connected to the purification transmission pipeline 23 and is provided with an adsorption liquid interface 249. The output end of the adsorption barrel 241 is docked with the filtrate barrel 242. The filtrate barrel 242 is connected upward to a diffusion type drying hopper 25 through a filtrate cylinder 243. An adsorption liquid filtering pump 2431 is arranged at the bottom of the filtrate cylinder 243, and a discharge cylinder 2432 is externally connected to the adsorption liquid filtering pump 2431.

[0047] A driving roller 246 and spiral mixing blades 247 mounted on the driving roller 246 are arranged in the inner cavity of the barrel body of the adsorption barrel 241. A driver 245 for driving the driving roller 246 is arranged at the outer end of the barrel body of the adsorption barrel 241. A turnover port 248 for docking with the filtrate barrel 242 is arranged on the side wall of the adsorption barrel 241.

[0048] The purification transmission pipeline 23 conveys the pretreated tail gas to the access part 244 of the adsorption barrel 241, and at the same time, the adsorption liquid is injected into the barrel body through the adsorption liquid interface 249. The driver 245 drives the driving roller 246 to rotate, driving the spiral mixing blades 247 to stir at a low speed, so that the tail gas and the adsorption liquid form turbulent mixing, the gas-liquid contact area is enlarged, and pollutants (such as acid gases, VOCs) are adsorbed or neutralized. The mixed gas-liquid slurry enters the filtrate barrel 242 through the turnover port 248. Under the action of gravity, the adsorption liquid with a larger density settles to the bottom of the barrel body, and the gas rises and enters the filtrate cylinder 243. The filter screen built in the filtrate cylinder 243 further intercepts the adsorption liquid droplets entrained in the gas, ensuring that the liquid content in the gas is lower than 50 mg / m 3 . The adsorption liquid settled at the bottom of the filtrate barrel 242 is quantitatively output through the adsorption liquid filtering pump 2431 and is conveyed to a regeneration system (such as a distillation tower or an oxidation pond) through the discharge cylinder 2432 to realize the recycling of the adsorbent. The purified gas is output from the top of the filtrate cylinder 243 to the diffusion type drying hopper 25 for final drying treatment.

[0049] In this embodiment, it is designed that the spiral mixing blades 247 break the gas-liquid interfacial film through forced shearing action, so that the pollutant molecules in the tail gas quickly diffuse into the main phase of the adsorption liquid. The filtrate barrel 242 adopts a conical bottom design, which cooperates with the centrifugal force field of the spiral blades to accelerate the settlement of the adsorption liquid and improve the separation efficiency.

[0050] Example 5. Please refer to Figure 2 、Figure 5 and Figure 6 Based on the contents of the above embodiment, the specific implementation structure of the diffusion drying hopper 25 and the air delivery box 26 is designed as follows:

[0051] The diffusion drying bucket 25 includes an output frame 251, a drying bucket body 252 and a drainage tube 253, which are combined into an integrated bucket structure, and the drainage tube 253 is located at the input end of the diffusion drying bucket 25 and is connected to the filtrate tube 243. A drainage tube 253 is arranged between the output frame 251 and the drying bucket body 252, and the drainage tube 253 is installed with a driving machine box 254, and the driving machine box 254 is equipped with a driving motor 255, and a spiral frame 256 is installed at the driving end of the driving motor 255, and the spiral frame 256 spirally extends in the inner cavity of the drying bucket body 252.

[0052] In this embodiment, the gas purified by the filtrate cylinder 243 enters the drainage cylinder 253 of the diffusion drying bucket 25, and the built-in spiral frame 256 rotates at a high speed under the drive motor 255, generating axial thrust flow and radial centrifugal force. The gas forms turbulence under the shearing action of the spiral blades, and fully contacts the drying medium (such as silica gel, molecular sieve or alumina) filled in the drying bucket body 252, and the moisture is adsorbed or condensed.

[0053] The gas delivery box 26 includes a collection frame 261 docked with the output frame 251, a buffer section 262 installed on the collection frame 261, and a turnover box 263 arranged at the bottom of the buffer section 262. The dried gas enters the collection frame 261 of the gas delivery box 26 through the output frame 251, and multiple air flows are mixed in the buffer section 262. The velocity gradient is eliminated by the built-in guide plate to form a uniform air flow field. After the air flow is further stabilized by the turnover box 263, it is delivered to the diversion purification unit at a constant pressure (such as 0.05-0.1MPa).

[0054] Preferably, the buffer zone 262 may adopt a honeycomb guide plate, which can reduce the standard deviation of the air flow velocity to within 5% through a sudden change in the cross-sectional area of ​​the flow channel, thereby eliminating pulsating pressure.

[0055] Example 6, please refer to Figure 1 and Figure 7 Based on the contents of the above embodiments, this embodiment designs a photocatalytic module as a terminal purification method for exhaust gas.

[0056] The diversion box 31 includes a separation barrel 313, on which a diversion pump 311 and a plurality of branch pumps 312 are arranged, and the diversion pump 311 is connected to the turnover box 263 through a pipeline. The terminal purification box 32 includes a plurality of secondary purification boxes 322, and the diversion pump 311 and the separation barrel 313 are both installed on the top of the corresponding secondary purification box 322, and an ozone generator 321 is arranged at the rear side of the box body of the secondary purification box 322, and a purification zone 323 is arranged in each of the secondary purification boxes 322, and an ultraviolet panel 324 is arranged in the purification zone 323.

[0057] The dried tail gas is output from the turnover box 263 of the gas transmission box 26 and enters the diverter pump 311 through the pipeline. The diverter pump 311 dynamically adjusts the flow rate according to the load state of the terminal purification box 32, and evenly distributes the gas to multiple secondary purification boxes 322. The diverter pump 311 adopts pressure-flow feedback control, and adjusts the valve flap opening in real time through the built-in differential pressure sensor to ensure that the air intake deviation of each secondary purification box 322 is ≤±5%.

[0058] The gas enters the purification zone 323 of the secondary purification chamber 322, and the ozone generator 321 injects ozone into the airflow, and the concentration is controlled at 50-100ppm. The ultraviolet panel 324 (wavelength 254nm / 185nm dual wavelength) irradiates the photocatalyst (such as TiO2 coating or honeycomb ceramic carrier), generates electron-hole pairs, activates ozone and oxygen to generate hydroxyl radicals (·OH) and reactive oxygen species (ROS). Pollutants (such as VOCs, sulfides) are oxidized and decomposed into CO2, H2O and harmless salts. The purified gas is discharged through the exhaust port at the top of the secondary purification chamber 322, and the residual ozone is catalytically decomposed into oxygen by the ozone decomposition net (carrying MnO2 catalyst) on the rear side of the box to ensure that the ozone concentration in the exhaust gas is ≤0.1ppm.

[0059] This embodiment adopts the photocatalytic-ozone synergistic oxidation mechanism of ultraviolet light activation: 185nm ultraviolet light decomposes O2 to generate ozone, and 254nm ultraviolet light excites TiO2 to generate photogenerated electrons (e - ) and holes (h + ), holes directly oxidize pollutants or react with H2O to generate ·OH. Ozone enhancement: O3 acts as an electron capture agent (e - +O3→O3 - ·), inhibiting the recombination of photogenerated carriers and decomposing itself to produce ·O - and ·OH, the oxidation capacity is increased by 2 to 3 times. Ozone leakage monitoring: An electrochemical ozone sensor is installed in the secondary purification chamber 322. When the concentration exceeds the standard, the ultraviolet panel 324 is closed and the exhaust system is started.

[0060] The photocatalysis-ozone synergistic system can degrade stubborn pollutants such as chlorinated hydrocarbons and polycyclic aromatic hydrocarbons that are difficult to treat by traditional methods, with a removal rate of ≥95%. Through photocatalysis-ozone synergistic oxidation and modular intelligent distribution technology, the deep purification and safe emission of chemical tail gas are realized.

[0061] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

[0062] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A chemical production safety tail gas treatment device, comprising a treatment frame (11) and a vertical support frame (12) and a horizontal support frame (13) mounted on the treatment frame (11); a multi-stage filtering and purification unit is mounted on the vertical support frame (12), and a split flow purification unit is mounted on the horizontal support frame (13); characterized in that: The multi-stage filtering and purifying unit comprises an air inlet filter hopper (22), a purifying barrel (24) and a diffusion drying hopper (25); the air inlet filter hopper (22) is mounted on a processing frame (11) and is externally connected to an air inlet mixing pipeline (21); the diffusion drying hopper (25) is mounted on the top of a vertical supporting frame (12) and is provided with a purifying barrel (24) at its input end; the air inlet filter hopper (22) is provided with a purifying transmission pipeline (23) at its output end, and the purifying transmission pipeline (23) is connected to the purifying barrel (24); The output end of the diffusion drying hopper (25) is connected to an air delivery box (26), which is installed on a transverse support frame (13). The diversion purification unit includes a diversion chassis (31) and a plurality of terminal purification chassis (32) installed on the diversion chassis (31), and the output end of the air delivery box (26) is connected to the diversion chassis (31).

2. The chemical production safety tail gas treatment device according to claim 1 is characterized in that: The air intake mixing pipeline (21) comprises an inlet pipe (211) and a circulation pipe (212) connected in series, the inlet pipe (211) is provided with a flow valve (213), the circulation pipe (212) is provided with a booster pump (215), and a quick cooling barrel (214) is provided at the connection between the two.

3. The chemical production safety tail gas treatment device according to claim 2 is characterized in that: The output end of the rapid cooling barrel (214) divides the gas into a main gas flow and a circulating gas flow through a circulation pipe (212); the circulating gas flow is pressurized by a booster pump (215) and then mixed with the main gas flow to form a turbulent flow.

4. The chemical production safety tail gas treatment device according to claim 2 is characterized in that: The main body of the air inlet filter (22) is a filter cartridge (221), and the filter cartridge (221) is internally provided with a composite filter material; A backwasher (222) is provided at the bottom of the filter cylinder (221), and the backwasher (222) is externally connected to a backwash pump (223). The output end of the backwasher (222) is connected to a purification transmission pipeline (23) through an air flow filter (224), and the purification transmission pipeline (23) leads to the purification machine cylinder (24).

5. The chemical production safety tail gas treatment device according to claim 4 is characterized in that: The purification cylinder (24) comprises an adsorption cylinder (241) and a filtrate cylinder (242); the cylinder input end of the adsorption cylinder (241) is provided with an access mechanism (244); the access mechanism (244) is connected to the purification transmission pipeline (23) and is provided with an adsorption liquid interface (249); the output end of the adsorption cylinder (241) is connected to the filtrate cylinder (242); the filtrate cylinder (242) is connected upward to the diffusion drying hopper (25) through the filtrate cylinder (243); An adsorption liquid filtration pump (2431) is provided at the bottom of the filtrate cylinder (243), and the adsorption liquid filtration pump (2431) is externally connected to a discharge cylinder (2432).

6. The chemical production safety tail gas treatment device according to claim 5, characterized in that: The inner cavity of the adsorption cylinder (241) is provided with a driving roller (246) and a spiral mixing blade (247) installed on the driving roller (246); the outer end of the cylinder of the adsorption cylinder (241) is provided with a driver (245) for driving the driving roller (246); and the side wall of the adsorption cylinder (241) is provided with a turnover port (248) for connecting with the filtrate cylinder (242).

7. The chemical production safety tail gas treatment device according to claim 6, characterized in that: The diffusion drying hopper (25) comprises an output frame (251), a drying hopper body (252) and a drainage cylinder (253); the output frame (251), the drying hopper body (252) and the drainage cylinder (253) are combined into an integrated hopper structure; the drainage cylinder (253) is located at the input end of the diffusion drying hopper (25) and is connected to the filtrate cylinder (243).

8. The chemical production safety tail gas treatment device according to claim 7, characterized in that: A drainage tube (253) is arranged between the output frame (251) and the drying bucket body (252); a driving box (254) is installed on the drainage tube (253); a driving motor (255) is built in the driving box (254); a spiral frame (256) is installed at the driving end of the driving motor (255); and the spiral frame (256) extends in a spiral manner into the inner cavity of the drying bucket body (252); The gas delivery box (26) comprises a collecting frame (261) docked with the output frame (251), a buffering section (262) installed on the collecting frame (261), and a turnover box (263) arranged at the bottom of the buffering section (262).

9. The chemical production safety tail gas treatment device according to claim 1, characterized in that: The flow diversion box (31) comprises a separation barrel (313), on which a flow diversion pump (311) and a plurality of branch pumps (312) are arranged, and the flow diversion pump (311) is connected to the turnover box (263) through a pipeline.

10. The chemical production safety tail gas treatment device according to claim 9, characterized in that: The terminal purification box (32) includes a plurality of secondary purification boxes (322), the diversion pump (311) and the separation cylinder (313) are both installed on the top of the corresponding secondary purification box (322), an ozone generator (321) is arranged on the rear side of the box body of the secondary purification box (322), and a purification zone (323) is arranged in each of the secondary purification boxes (322), and an ultraviolet panel (324) is arranged in the purification zone (323).

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