An exhaust gas treatment device for acrylic acid production

Abstract

The utility model relates to the technical field of plastic raw materials, especially to a waste gas treatment device for acrylic production, which comprises a waste gas treatment chamber, a condensation cavity arranged in the waste gas treatment chamber, a condensation recovery assembly arranged in the condensation cavity, an alkali liquor absorption cavity arranged in the waste gas treatment chamber, a UV catalytic recovery cavity arranged in the waste gas treatment chamber, and a UV catalytic recovery assembly arranged in the UV catalytic recovery cavity. The utility model condenses and recovers volatile acrylic liquid to reduce the concentration of waste gas and the possibility of explosion. The alkali liquor absorption cavity neutralizes acidic components to reduce irritating odor and corrosiveness. The UV catalytic recovery cavity degrades residual organic matter to ensure exhaust safety. The valve controls the air inlet and the exhaust port, facilitating operation and safety management. The multi-stage integrated design improves the treatment efficiency, comprehensively covers the physical, chemical and photocatalytic treatment of acrylic waste gas, effectively reduces the health hazards and explosion risks, and meets the safety standards for waste gas emission.

Description

Technical Field

[0001] This utility model relates to the field of plastic raw material technology, and in particular to a waste gas treatment device for acrylic acid production. Background Technology

[0002] Acrylic acid is a common specialty engineering plastic, often used in the manufacture of various polymer materials. It has a strong, pungent odor and a certain degree of volatility. During stirring, the surface area of ​​the acrylic liquid increases significantly, accelerating its volatilization. If the volatilized acrylic acid is not treated, it can cause serious irritation to the eyes, respiratory tract, and skin of operators. The acrylic acid vapor generated during stirring can form an explosive mixture with air, posing a significant risk. Therefore, there is an urgent need for a waste gas treatment device that can treat the waste gas generated during stirring. Utility Model Content

[0003] The purpose of this invention is to provide a waste gas treatment device for acrylic acid production that addresses the shortcomings of existing technologies, effectively reducing health hazards and explosion risks, and meeting waste gas emission safety standards.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a waste gas treatment device for acrylic acid production, comprising a waste gas treatment chamber, a condensation chamber disposed within the waste gas treatment chamber, a condensation recovery component disposed within the condensation chamber, an alkali absorption chamber disposed within the waste gas treatment chamber, a UV catalytic recovery chamber disposed within the waste gas treatment chamber, and a UV catalytic recovery component disposed within the UV catalytic recovery chamber. The alkali absorption chamber is disposed between the condensation chamber and the UV catalytic recovery chamber, and the condensation chamber and the alkali absorption chamber are connected through a first vent hole. The alkali absorption chamber and the UV catalytic recovery chamber are connected through a second vent hole. Waste gas inlets and waste gas outlets are respectively provided on the left and right sides of the waste gas treatment chamber, and valves are provided on both the waste gas inlets and the waste gas outlets.

[0005] A further improvement to the above scheme is that a particulate filter is connected to the inlet of the exhaust gas inlet.

[0006] A further improvement to the above scheme is that the condensation recovery assembly includes a condenser tube disposed in the condensation chamber, a condenser sleeve sleeved outside the condenser tube, a chiller disposed in the condensation chamber, and a liquid collection tank disposed at the bottom of the condensation chamber. The inlet end of the condenser tube is connected to the exhaust gas inlet, and the outlet end of the condenser tube is provided with a gas-liquid separator. The gas outlet end of the gas-liquid separator is connected to the alkaline solution absorption chamber through a gas hole, and the liquid outlet end of the gas-liquid separator is connected to the liquid collection tank. The bottom and top of the condenser sleeve are respectively provided with a coolant inlet and a coolant outlet. The coolant inlet and coolant outlet are respectively connected to the water outlet and water inlet of the chiller. A drain valve is provided at the bottom of the liquid collection tank.

[0007] A further improvement to the above scheme is that an alkali storage tank is provided at the top of the alkali absorption chamber, and multiple layers of staggered spray pipes are provided on both sides of the interior of the alkali absorption chamber, with the inlet of the spray pipes connected to the bottom of the alkali storage tank.

[0008] A further improvement to the above scheme is that an alkali circulation pump is provided at the bottom of the alkali absorption chamber, and the outlet of the alkali circulation pump is connected to the top of the alkali storage tank.

[0009] A further improvement to the above scheme is that the UV catalytic recovery assembly includes a UV lamp tube disposed at the top of the UV catalytic recovery chamber, a catalyst carrier disposed in the UV catalytic recovery chamber, and a fan disposed in the UV catalytic recovery assembly, wherein the air inlet of the fan is connected to the second air hole.

[0010] A further improvement to the above scheme is that the catalyst support is hollow inside, and a number of honeycomb-shaped through holes are provided through the outer wall of the catalyst support.

[0011] A further improvement to the above scheme is that a water collection tank is provided at the bottom of the UV catalytic recovery chamber, a drain pipe is connected to the bottom of the water collection tank, and a drain valve is provided on the drain pipe.

[0012] A further improvement to the above scheme is that a plurality of UV lamps are provided, and the plurality of UV lamps are evenly arranged on the top inner wall of the UV catalytic recovery chamber.

[0013] The beneficial effects of this utility model are as follows: This utility model includes a waste gas treatment chamber, a condensation chamber disposed within the waste gas treatment chamber, a condensation recovery component disposed within the condensation chamber, an alkaline absorption chamber disposed within the waste gas treatment chamber, a UV catalytic recovery chamber disposed within the waste gas treatment chamber, and a UV catalytic recovery component disposed within the UV catalytic recovery chamber. The alkaline absorption chamber is disposed between the condensation chamber and the UV catalytic recovery chamber. The condensation chamber and the alkaline absorption chamber are connected through a first vent hole, and the alkaline absorption chamber and the UV catalytic recovery chamber are connected through a second vent hole. Waste gas inlets and waste gas outlets are respectively provided on the left and right sides of the waste gas treatment chamber, and valves are provided on both the waste gas inlets and the waste gas outlets. This invention reduces the concentration of volatile acrylic acid liquid through condensation recovery, thereby reducing the possibility of explosion; the alkaline absorption chamber neutralizes acidic components, reducing irritating odors and corrosiveness; the UV catalytic recovery chamber degrades residual organic matter, ensuring exhaust safety; valves control the air inlet and outlet for easy operation and safety management; the multi-stage integrated design improves treatment efficiency; and it comprehensively covers the physical, chemical, and photocatalytic treatment of acrylic acid waste gas, effectively reducing health hazards and explosion risks, and meeting waste gas emission safety standards. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a cross-sectional view of the present invention.

[0016] Explanation of reference numerals in the attached drawings: including exhaust gas treatment chamber 1, exhaust gas inlet 11, exhaust gas outlet 12, condensation chamber 2, condensation recovery assembly 21, condensation pipe 211, condensation sleeve 212, coolant inlet 2121, coolant outlet 2122, chiller 213, liquid collection tank 214, drain valve 2141, gas-liquid separator 215, alkali absorption chamber 3, alkali storage tank 31, spray pipe 32, alkali circulation pump 33, UV catalytic recovery chamber 4, UV catalytic recovery assembly 41, UV lamp tube 411, catalyst carrier 412, honeycomb through hole 4121, fan 413, water collection tank 414, drain pipe 415, drain valve 4151, first vent 5, second vent 51, and particulate filter 6. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings, such as... Figure 1-2As shown, this utility model provides a waste gas treatment device for acrylic acid production, including a waste gas treatment chamber 1, a condensation chamber 2 disposed within the waste gas treatment chamber 1, a condensation recovery component 21 disposed within the condensation chamber 2, an alkali absorption chamber 3 disposed within the waste gas treatment chamber 1, a UV catalytic recovery chamber 4 disposed within the waste gas treatment chamber 1, and a UV catalytic recovery component 41 disposed within the UV catalytic recovery chamber 4. The alkali absorption chamber 3 is disposed between the condensation chamber 2 and the UV catalytic recovery chamber 4, and the condensation chamber 2 and the alkali absorption chamber 3 are connected by a first vent 5. The alkali absorption chamber 3 and the UV catalytic recovery chamber 4 are connected by a second vent 51. The left and right sides of component 1 are respectively provided with exhaust gas inlet 11 and exhaust gas outlet 12. Both exhaust gas inlet 11 and exhaust gas outlet 12 are equipped with valves. The volatilized acrylic liquid is recovered by condensation, which reduces the concentration of exhaust gas and the possibility of explosion. The alkaline absorption chamber 3 neutralizes the acidic components, reducing the irritating odor and corrosiveness. The UV catalytic recovery chamber 4 degrades residual organic matter, ensuring exhaust safety. The valves control the inlet and outlet, which facilitates operation and safety management. The multi-stage integrated design improves the treatment efficiency and comprehensively covers the physical, chemical and photocatalytic treatment of acrylic acid exhaust gas, effectively reducing health hazards and explosion risks, and meeting the exhaust gas emission safety standards.

[0018] The exhaust gas inlet 11 of this utility model is connected to a particulate filter 6. The particulate filter 6 can remove solid particulate impurities in advance, prevent blockage of the air holes 5 between the chambers, extend the service life of the device, enhance the reliability and stability of the device, reduce the maintenance frequency, and ensure continuous operation of the exhaust gas treatment process.

[0019] The condensation recovery assembly 21 of this utility model includes a condenser tube 211 disposed in a condensation chamber 2, a condenser sleeve 212 sleeved outside the condenser tube 211, a chiller 213 disposed in the condensation chamber 2, and a liquid collection tank 214 disposed at the bottom of the condensation chamber 2. The inlet end of the condenser tube 211 is connected to the exhaust gas inlet 11, and the outlet end of the condenser tube 211 is provided with a gas-liquid separator 215. The gas outlet end of the gas-liquid separator 215 is connected to the alkaline solution absorption chamber 3 through a first gas hole 5, and the liquid outlet end of the gas-liquid separator 215 is connected to the liquid collection tank 214. The bottom and top of the condenser sleeve 212 are respectively provided with a coolant inlet 2121 and a coolant outlet 2122. The coolant inlet 2121 and the coolant outlet 2122 are... The outlet and inlet of the chiller 213 are not connected. The bottom of the collection tank 214 is equipped with a drain valve 2141. After the acrylic acid evaporates, it can be condensed and recovered as liquid. This component uses the circulating coolant of the chiller 213 to cool the exhaust gas in the condenser tube 211. After the acrylic acid is condensed, it passes through the gas-liquid separator 215. The condensed liquid flows into the collection tank 214 for recovery, while the gas enters the alkali absorption chamber 3 through the first gas hole 5 for post-treatment, which reduces the organic content in the exhaust gas and the loss of raw materials. The drain valve 2141 of the collection tank 214 facilitates the collection and utilization of the recovered acrylic acid, reducing production costs. At the same time, the condensation treatment lowers the temperature of the exhaust gas, creating better conditions for subsequent alkali absorption and improving the overall exhaust gas treatment efficiency.

[0020] The present invention has an alkaline solution storage tank 31 at the top of the alkaline solution absorption chamber 3. The interior of the alkaline solution absorption chamber 3 has multiple layers of staggered spray pipes 32 arranged on both sides. The inlet of the spray pipe 32 is connected to the bottom of the alkaline solution storage tank 31. Alkaline solution is sprayed from the alkaline solution storage tank 31 through the multiple layers of staggered spray pipes 32. Acrylic acid is acidic, and the alkaline solution can effectively neutralize it to generate acrylate and water, eliminating the irritating odor. The multi-layer staggered spray increases the gas-liquid contact area and reaction time, improves the neutralization efficiency, ensures that the acidic components in the exhaust gas are completely removed, and reduces the risk of respiratory and skin irritation.

[0021] The bottom of the alkaline absorption chamber 3 of this utility model is equipped with an alkaline circulation pump 33. The outlet of the alkaline circulation pump 33 is connected to the top of the alkaline storage tank 31. The circulation pump pumps the alkaline solution at the bottom of the absorption chamber back to the storage tank, which reduces the consumption of alkaline solution and the generation of waste liquid, and lowers the operating cost. At the same time, the circulation keeps the alkaline solution concentration stable, which improves the absorption efficiency and the sustainability of the device.

[0022] The UV catalytic recovery component 41 of this utility model includes a UV lamp tube 411 disposed at the top of the UV catalytic recovery chamber 4, a catalyst carrier 412 disposed within the UV catalytic recovery chamber 4, and a fan 413 disposed within the UV catalytic recovery component 41. The air inlet of the fan 413 is connected to the second air hole 51. UV catalysis can degrade residual acrylic acid and other organic matter into harmless substances. The UV lamp tube 411 provides ultraviolet light to excite the catalyst. The fan 413 ensures that the exhaust gas passes evenly through the catalyst carrier 412, thereby improving the degradation efficiency and treating the trace pollutants that were not completely removed in the first two stages, further reducing the risk of explosion and environmental pollution.

[0023] The catalyst carrier 412 of this invention has a hollow interior, and several honeycomb-shaped through holes 4121 are provided through the outer wall of the catalyst carrier 412. The catalyst can be placed in the hollow cavity inside the catalyst or coated on the inner and outer walls of the catalyst carrier 412. The honeycomb structure provides a high specific surface area, increases the contact opportunity between the waste gas and the catalyst, and improves the catalytic degradation efficiency. The honeycomb-shaped through holes 4121 reduce airflow resistance, ensure uniform distribution of waste gas, avoid local overheating or treatment dead zones, and enhance the stability and effect of UV catalysis.

[0024] The bottom of the UV catalytic recovery chamber 4 of this utility model is provided with a water collection tank 414, and the bottom of the water collection tank 414 is connected to a drain pipe 415. A drain valve 4151 is provided on the drain pipe 415. Water or condensate may be generated during the UV catalytic process. The water collection tank 414 collects these liquids to prevent accumulation from affecting the performance of the UV lamp tube 411 or the catalyst. The drain valve 4151 facilitates regular maintenance and drainage, keeps the chamber dry, extends the life of the components, and ensures continuous and safe processing.

[0025] This utility model has several UV lamps 411, which are evenly arranged on the top inner wall of the UV catalytic recovery chamber 4. The UV lamps 411 are electrically connected to an external power source. The even arrangement ensures that the UV light fully covers the catalyst carrier 412, avoids light dead zones, and improves photocatalytic efficiency and degradation rate.

[0026] Working principle: During operation, waste gas containing acrylic acid vapor and potentially particulate matter enters the device through waste gas inlet 11 and first passes through particulate filter 6, a step that removes solid impurities beforehand. The pre-treated waste gas then enters condensation chamber 2, flowing through condenser pipe 211, which is enclosed by condenser sleeve 212 filled with circulating coolant. Chiller 213 provides continuous low-temperature cooling. During this process, the waste gas temperature drops sharply, and most of the gaseous acrylic acid liquefies into liquid due to condensation. The condensed gas-liquid mixture enters gas-liquid separator 215 for separation. The liquid acrylic acid is recovered to collection tank 214, where it can be collected and utilized through drain valve 2141. The pre-purified low-temperature gas then enters the next stage through vent 5. The incoming gas enters the alkaline absorption chamber 3. The alkaline storage tank 31 at the top of the chamber sprays alkaline solution, such as NaOH solution, downwards through multi-layered staggered spray pipes 32, making full countercurrent contact with the upward-flowing waste gas. After the first two stages of treatment, the residual trace amounts of organic matter such as acrylic acid in the waste gas enter the final UV catalytic recovery chamber 4 for deep purification. Under the combined action of ultraviolet light and catalyst, the residual organic matter is efficiently decomposed into harmless carbon dioxide and water. The fan 413 at the end of the system provides power to guide the orderly flow of gas throughout the entire treatment process. The water generated by the reaction is collected by the water collection tank 414 at the bottom and discharged periodically through the drain valve 4151. Finally, the clean gas after the above three-stage treatment is discharged from the exhaust port 12, fully meeting the environmental protection emission requirements.

[0027] Of course, the above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A waste gas treatment device for acrylic acid production, characterized in that: The system includes a waste gas treatment chamber (1), a condensation chamber (2) located in the waste gas treatment chamber (1), a condensation recovery component (21) located in the condensation chamber (2), an alkaline absorption chamber (3) located in the waste gas treatment chamber (1), a UV catalytic recovery chamber (4) located in the waste gas treatment chamber (1), and a UV catalytic recovery component (41) located in the UV catalytic recovery chamber (4). The alkaline absorption chamber (3) is located between the condensation chamber (2) and the UV catalytic recovery chamber (4). The condensation chamber (2) and the alkaline absorption chamber (3) are connected through a first vent (5). The alkaline absorption chamber (3) and the UV catalytic recovery chamber (4) are connected through a second vent (51). Waste gas inlets (11) and waste gas outlets (12) are respectively provided on the left and right sides of the waste gas treatment chamber (1). Valves are provided on both the waste gas inlets (11) and the waste gas outlets (12).

2. The waste gas treatment device for acrylic acid production according to claim 1, characterized in that: A particulate filter (6) is connected to the inlet of the exhaust gas inlet (11).

3. The waste gas treatment device for acrylic acid production according to claim 1, characterized in that: The condensation recovery assembly (21) includes a condenser tube (211) disposed in the condensation chamber (2), a condenser sleeve (212) sleeved on the outside of the condenser tube (211), a chiller (213) disposed in the condensation chamber (2), and a liquid collection tank (214) disposed at the bottom of the condensation chamber (2). The inlet end of the condenser tube (211) is connected to the exhaust gas inlet (11), and a gas-liquid separator (215) is disposed at the outlet end of the condenser tube (211). The gas separator (215) is connected to the alkaline absorption chamber (3) through the air hole (5). The liquid outlet of the gas separator (215) is connected to the liquid collection tank (214). The bottom and top of the condensing sleeve (212) are respectively provided with a coolant inlet (2121) and a coolant outlet (2122). The coolant inlet (2121) and the coolant outlet (2122) are respectively connected to the water outlet and water inlet of the chiller (213). The bottom of the liquid collection tank (214) is provided with a drain valve (2141).

4. The waste gas treatment device for acrylic acid production according to claim 1, characterized in that: The alkaline absorption chamber (3) is provided with an alkaline storage tank (31) at the top. Multiple layers of staggered spray pipes (32) are provided on both sides of the interior of the alkaline absorption chamber (3). The inlet of the spray pipe (32) is connected to the bottom of the alkaline storage tank (31).

5. The waste gas treatment device for acrylic acid production according to claim 4, characterized in that: The bottom of the alkali absorption chamber (3) is equipped with an alkali circulation pump (33), and the outlet of the alkali circulation pump (33) is connected to the top of the alkali storage tank (31).

6. The waste gas treatment device for acrylic acid production according to claim 1, characterized in that: The UV catalytic recovery assembly (41) includes a UV lamp tube (411) disposed on the top of the UV catalytic recovery chamber (4), a catalyst carrier (412) disposed in the UV catalytic recovery chamber (4), and a fan (413) disposed in the UV catalytic recovery assembly (41). The air inlet of the fan (413) is connected to the second air hole (51).

7. The waste gas treatment device for acrylic acid production according to claim 6, characterized in that: The catalyst carrier (412) is hollow inside, and a number of honeycomb-shaped through holes (4121) are provided through the outer wall of the catalyst carrier (412).

8. The waste gas treatment device for acrylic acid production according to claim 6, characterized in that: The bottom of the UV catalytic recovery chamber (4) is provided with a water collection tank (414), and the bottom of the water collection tank (414) is connected to a drain pipe (415), and a drain valve (4151) is provided on the drain pipe (415).

9. A waste gas treatment device for acrylic acid production according to claim 6, characterized in that: The UV lamp tubes (411) are provided in a plurality of manner, and the plurality of UV lamp tubes (411) are evenly arranged on the top inner wall of the UV catalytic recovery chamber (4).

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