A waste plastic granulation waste gas treatment equipment

Abstract

This invention discloses a waste plastic granulation waste gas treatment device, which relates to the field of waste gas treatment technology. The waste plastic granulation waste gas treatment device includes a base, a refrigeration mechanism, and a dust removal mechanism installed on the top side of the base. A purification mechanism is installed at the top of the base, away from the dust removal mechanism. The refrigeration mechanism includes a tank and a delivery pump. A cooler is fixedly installed on the outer circumference of the tank near the delivery pump. A right-angle pipe is fixedly connected to the middle of the bottom of the tank's inner cavity. A cooling component is installed at the top of the tank's inner cavity. The cooling component includes a lower conical hood and a guide pipe. An upper conical hood is fixedly installed at the bottom of the guide pipe. A drain outlet is opened at the bottom of the guide pipe near the lower conical hood. A refrigeration unit is installed between the surface of the upper conical hood and the inner wall of the tank, achieving the purpose of cooling. This device can pre-treat the waste gas, effectively reduce the waste gas temperature, promote waste gas treatment, and is safe and reliable.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to a waste gas treatment device for waste plastic granulation. Background Technology

[0002] With the continuous growth in the consumption of plastic products, the amount of waste plastic generated is also increasing rapidly. The granulation and recycling of waste plastics can not only greatly save resources but also reduce environmental pollution and improve the quality of the ecological environment, making it a crucial measure for resource-based development. The granulation process of waste plastics generates high-temperature waste gases containing large amounts of dust particles and harmful gases, requiring treatment. Therefore, waste gas treatment equipment is needed.

[0003] For example, the waste plastic granulation exhaust gas treatment device disclosed in Chinese Patent Publication No. CN214319695U includes a demister, an oil fume processor, and a low-temperature plasma device. It also includes a particle filter component, an oxidation light irradiation component, a spray component, and an activated carbon adsorption component. The demister, oil fume processor, low-temperature plasma device, particle filter component, oxidation light irradiation component, spray component, and activated carbon adsorption component are arranged at intervals, and the particle filter component, oxidation light irradiation component, spray component, demister, oil fume processor, low-temperature plasma device, and activated carbon adsorption component are connected in sequence by a connecting pipe. After the exhaust gas is sprayed and washed, it passes through the demister, oil fume processor, and low-temperature plasma device in sequence, and the exhaust gas undergoes demisting, oil removal, and purification treatment in sequence. Finally, it enters the activated carbon tank for adsorption treatment, thereby degrading the exhaust gas into stable and pollution-free compounds that are discharged to the outside through the exhaust pipe.

[0004] Currently, existing technical references suggest that waste gas can be transported and then adsorbed into an activated carbon tank. However, when treating high-temperature waste gas, the high temperature will significantly weaken the adsorption performance of the activated carbon when it comes into contact with the activated carbon adsorption device, and may even cause desorption, material deterioration and other problems, making it difficult to effectively cool down the high-temperature waste gas. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention is implemented through the following technical solution: A waste gas treatment device for waste plastic granulation includes: A base, and a dust removal mechanism installed on the top side of the base, wherein a purification mechanism is installed on the top of the base and at the end away from the dust removal mechanism; A refrigeration mechanism, comprising a tank and a delivery pump, wherein the tank is fixedly installed at the middle of the top of the base, the delivery pump is fixedly installed at the top of the base and near the tank, a cooler is fixedly installed on the outer circumference of the tank and near the delivery pump, a right-angle pipe is fixedly connected at the middle of the bottom of the inner cavity of the tank, and a cooling component is installed at the top of the inner cavity of the tank. The cooling assembly includes a lower conical shroud and a guide pipe. The center of the inner cavity of the lower conical shroud is fixedly installed to the top of the surface of the right-angle pipe. The guide pipe is fixedly installed at the center of the top of the tank. An upper conical shroud is fixedly installed at the bottom of the guide pipe. A drain outlet is provided at the bottom of the guide pipe near the lower conical shroud. A refrigeration unit is installed between the surface of the upper conical shroud and the inner wall of the tank. The exhaust gas is transported through the right-angle pipe, causing it to spray upwards along the pipe. The exhaust gas contacts the upper conical shroud, causing it to move along the inner wall of the shroud. Through the principle of heat transfer, the heat in the exhaust gas is transferred to the upper conical shroud. The exhaust gas passes through the gap between the upper and lower conical shrouds, increasing the contact area between the exhaust gas and the upper and lower conical shrouds. This results in high heat transfer efficiency between the exhaust gas and the upper and lower conical shrouds, which helps to cool the exhaust gas.

[0006] Preferably, the right-angle pipe penetrates the bottom of the inner cavity of the tank and extends to its outside, the inlet end of the delivery pump penetrates the bottom of the tank and extends to its inside, and the outlet at the top of the delivery pump is connected to the inlet at the bottom of the cooler.

[0007] Preferably, the lower conical cover is installed directly below the upper conical cover, and the lower conical cover and the upper conical cover are suspended in the air. There are three refrigeration devices, and the three refrigeration devices are evenly distributed on the surface of the upper conical cover. The refrigeration devices penetrate the inner wall of the tank and extend to its outside.

[0008] By evenly installing refrigeration devices on the surface of the upper conical shroud, multiple refrigeration devices can be used together to refrigerate the upper conical shroud, thus keeping it at a low temperature. This makes it easier to prevent the exhaust gas from getting too hot without cooling it.

[0009] Preferably, the guide pipe is installed vertically, and the drain outlets are evenly distributed at the bottom of the guide pipe surface and near the lower conical cover.

[0010] Preferably, the dust removal mechanism includes a protective box, which is fixedly installed on the side of the top of the base. A fan is fixedly installed on the top of the protective box, and a Z-shaped air duct is fixedly installed on the side of the surface of the protective box. The Z-shaped air duct penetrates the surface of the protective box and extends into its interior. A dust collection box is fixedly installed at the bottom of the inner cavity of the protective box, and a cyclone separator is installed on the top of the dust collection box near the Z-shaped air duct.

[0011] The exhaust gas generated during the granulation of waste plastic is drawn in by the suction force of the fan and discharged into the interior of the conical duct by the fan. Under the action of gas pressure, the exhaust gas passes through the conical duct at high speed and enters the interior of the Z-shaped air duct. With the connection of the Z-shaped air duct, the exhaust gas enters the interior of the right-angle pipe.

[0012] Preferably, the cyclone separator includes a conical shroud, the bottom of which is fixedly installed to the top of the dust collection box via a square tube. The air inlet of the conical shroud penetrates the inner wall of the protective box and extends to its exterior. The top of the Z-shaped air duct penetrates the surface of the conical shroud and extends into its interior. Guide vanes are fixedly installed on the conical surface inside the conical shroud. A conical hopper is fixedly installed at one end of the Z-shaped air duct extending into the conical shroud. A guide vane is fixedly installed on the surface of the conical hopper near the guide vane. Equipped with an elliptical sphere, the exhaust gas enters at high speed into the conical hood. Guide vanes, installed at an angle, guide the high-speed exhaust gas, creating a swirling flow. Particulate matter carried by the exhaust gas, influenced by centrifugal force, moves and disperses along the conical surface inside the hood. As the particulate matter moves, it is further dispersed by its own gravity, and a square tube connects the hood to the dust collection box. This allows most of the displaced particulate matter to fall into the dust collection box, thus collecting and removing dust.

[0013] Preferably, the air inlet of the conical shroud is connected to the air outlet of the fan, the guide vanes are installed at an angle, and the guide vanes are evenly distributed on the conical surface inside the conical shroud.

[0014] By installing an elliptical ball between the guide vane and the conical hopper, the smooth surface of the elliptical ball, combined with fluid dynamics, reduces resistance and promotes the guidance of the flowing exhaust gas. This causes some of the particulate matter that comes into contact with the inner wall of the conical guide hood to bounce back to the surface of the conical hopper. The conical hopper then blocks and guides the bounced particulate material, causing it to fall.

[0015] Preferably, the conical hood and the dust collection box are connected by a square tube, and the guide vanes, elliptical spheres and conical buckets are installed at the same height.

[0016] Preferably, the purification mechanism includes a tower body and an activated carbon adsorber. The tower body is fixedly installed on the top of the base and near the cooler. The outlet of the cooler is connected to the inlet on the surface of the tank. The outlet at the top of the tank is connected to the tower body. The activated carbon adsorber is installed on the side of the tower body. A bent pipe connects the top of the activated carbon adsorber to the top of the tower body. An infusion set is installed on the side of the tower body. The outlet of the infusion set penetrates the surface of the tower body and extends into its interior. A spray head is connected to the outlet of the infusion set. A conical nozzle is installed at the bottom of the head, and a return pipe is fixedly installed on the side of the tower body surface. The bottom end of the return pipe is connected to the top end of the guide pipe, and the top end of the return pipe is connected to a water collection bucket. The inlet of the infusion device extends into the interior of the tower body, so that the infusion device draws out part of the harmful gas reaction solution inside the tower body and delivers the harmful gas reaction solution into the interior of the spray head, and sprays it out from the conical nozzle. The sprayed harmful gas reaction solution moves downward, while the exhaust gas moves upward. The two move in opposite directions, increasing the contact time between the exhaust gas and the harmful gas reaction solution, and promoting the treatment of the exhaust gas. As the exhaust gas flows out from the top of the tower, it enters the activated carbon adsorber through the connection of the bend pipe, thus undergoing further purification.

[0017] Preferably, the inlet of the infusion set penetrates the surface of the tank and extends into its interior. The return pipe is installed at an angle. The inner diameter of the water collection bucket gradually increases from top to bottom. After the harmful gas reaction solution is sprayed out at the conical nozzle to spray the exhaust gas, the water collection bucket collects part of the sprayed solution. Under the guidance of the return pipe, the harmful gas reaction solution flows into the interior of the guide pipe and flows out from the drain outlet onto the surface of the upper conical cover. This not only absorbs the heat from the upper conical cover through heat transfer, but also allows the harmful gas reaction solution to come into contact with the exhaust gas drifting between the lower and upper conical covers as it flows continuously downward, thus achieving multiple functions.

[0018] The harmful gas reaction solution is drawn out of the tank by the suction of the transfer pump and delivered to the cooler. The cooler cools the harmful gas reaction solution, causing its temperature to drop. The cooled harmful gas reaction solution is then discharged into the interior of the tower, forming a cycle for recycling and reuse of the harmful gas reaction solution.

[0019] This invention provides a waste gas treatment device for waste plastic granulation. It has the following beneficial effects: I. This waste plastic granulation exhaust gas treatment equipment utilizes the contact between the exhaust gas and the upper conical hood, allowing the exhaust gas to move along the inner wall of the upper conical hood. Through the principle of heat transfer, the heat in the exhaust gas is transferred to the upper conical hood. Furthermore, the exhaust gas passes through the high-risk area between the upper and lower conical hoods, increasing the contact area between the exhaust gas and the upper and lower conical hoods. This results in high heat transfer efficiency between the exhaust gas and the upper and lower conical hoods, which helps to cool the exhaust gas.

[0020] Second, the waste plastic granulation exhaust gas treatment equipment uses refrigeration devices evenly installed on the surface of the upper conical hood. Multiple refrigeration devices can be used together to cool the upper conical hood, so that the upper conical hood is always kept at a low temperature. This makes it easier to prevent the exhaust gas temperature from becoming too high without cooling the exhaust gas.

[0021] 3. This waste plastic granulation exhaust gas treatment equipment utilizes inclined guide vanes. Under the guidance of the guide vanes, the high-speed flowing exhaust gas forms a vortex. The particulate matter carried by the exhaust gas is affected by centrifugal force and moves and disperses along the conical surface inside the conical hood. As the particulate matter moves, under the action of its own gravity, and through the square tube connecting the conical hood and the dust collection box, most of the moved particulate matter will fall into the interior of the dust collection box, thus collecting and removing dust from the particulate matter.

[0022] IV. This waste plastic granulation exhaust gas treatment equipment utilizes the composite fluid dynamics of a smooth elliptical sphere to reduce resistance and promote the flow of exhaust gas. This causes some of the particulate matter that comes into contact with the inner wall of the conical guide hood to bounce back to the surface of the conical bucket. The conical bucket then blocks and guides the bounced particulate material, causing it to fall.

[0023] 5. This waste plastic granulation exhaust gas treatment equipment utilizes the inlet of the infusion device to extend into the interior of the tower, allowing the infusion device to draw out some of the harmful gas reaction solution from the tower and transport it to the interior of the spray head, where it is sprayed out from the conical nozzle. The sprayed harmful gas reaction solution moves downwards, while the exhaust gas moves upwards, with the two moving in opposite directions. This increases the contact time between the exhaust gas and the harmful gas reaction solution, promoting the treatment of the exhaust gas.

[0024] VI. This waste plastic granulation exhaust gas treatment equipment, under the guidance of the return pipe, allows the harmful gas reaction solution to flow into the interior of the guide pipe, and allows the harmful gas reaction solution to flow out from the drain outlet onto the surface of the upper conical hood. It can not only absorb the heat of the upper conical hood through heat transfer, but also allow the harmful gas reaction solution to come into contact with the exhaust gas drifting between the lower and upper conical hoods as it flows continuously downwards, thus achieving multiple functions.

[0025] VII. This waste plastic granulation exhaust gas treatment equipment uses the suction of a conveying pump to draw out the harmful gas reaction solution from the tank and deliver it to a cooler. The cooler cools and lowers the temperature of the harmful gas reaction solution, and then discharges the cooled harmful gas reaction solution into the interior of the tower to form a cycle, thus recycling and reusing the harmful gas reaction solution. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the waste plastic granulation exhaust gas treatment equipment of the present invention; Figure 2 This is a bottom view schematic diagram of the waste plastic granulation exhaust gas treatment equipment of the present invention; Figure 3 This is a schematic diagram of the connection structure between the cooling mechanism and the base of the present invention; Figure 4 This is a cross-sectional schematic diagram of the internal structure of the right-angled pipe, the lower conical cover, and the upper conical cover of the present invention; Figure 5 This is a schematic diagram of the connection structure between the bases of the dust removal mechanism of the present invention; Figure 6 This is a schematic diagram of the internal structure of the protective box of the present invention. Figure 7 This is a schematic diagram of the internal structure of the conical drainage hood of the present invention. Figure 8 This is a schematic diagram of the internal structure of the tower body cross section of the present invention.

[0027] In the diagram: 1. Base; 2. Dust removal mechanism; 3. Purification mechanism; 4. Refrigeration mechanism; 21. Protective box; 22. Fan; 23. Z-shaped air duct; 24. Dust collection box; 25. Cyclone separator; 251. Conical hood; 252. Guide vane; 253. Conical hopper; 254. Elliptical sphere; 31. Tower body; 32. Activated carbon adsorber; 33. Bent pipe; 34. Infusion set; 35. Spray head; 36. Conical nozzle; 37. Return pipe; 38. Water receiving hopper; 41. Tank body; 42. Transfer pump; 43. Cooler; 44. Right-angle pipe; 45. Cooling component; 451. Lower conical hood; 452. Guide pipe; 453. Upper conical hood; 454. Drain; 455. Refrigeration appliance. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] For the first embodiment, please refer to... Figure 1-4 The present invention provides a technical solution: A waste gas treatment device for waste plastic granulation includes: A base 1, and a dust removal mechanism 2 installed on the top side of the base 1, and a purification mechanism 3 installed on the top of the base 1 and at the end away from the dust removal mechanism 2; The refrigeration mechanism 4 includes a tank 41 and a delivery pump 42. The tank 41 is fixedly installed at the middle of the top of the base 1. The delivery pump 42 is fixedly installed at the top of the base 1 and close to the tank 41. A cooler 43 is fixedly installed on the outer circular surface of the tank 41 and close to the delivery pump 42. A right-angle pipe 44 is fixedly connected at the middle of the bottom of the inner cavity of the tank 41. A cooling component 45 is installed at the top of the inner cavity of the tank 41. A right-angle pipe 44 penetrates the bottom of the inner cavity of the tank 41 and extends to its outside. The inlet of the transfer pump 42 penetrates the bottom of the tank 41 and extends to its inside. The outlet at the top of the transfer pump 42 is connected to the inlet at the bottom of the cooler 43.

[0030] The cooling assembly 45 includes a lower conical shroud 451 and a guide pipe 452. The center of the inner cavity of the lower conical shroud 451 is fixedly installed to the top of the surface of the right-angle pipe 44. The guide pipe 452 is fixedly installed at the center of the top of the tank 41. An upper conical shroud 453 is fixedly installed at the bottom end of the guide pipe 452. A drain port 454 is provided at the bottom of the surface of the guide pipe 452 near the lower conical shroud 451. A refrigeration appliance 455 is installed between the surface of the upper conical shroud 453 and the inner wall of the tank 41. Exhaust gas is transported through the right-angle pipe 44. This causes the exhaust gas to be ejected upwards along the right-angle pipe 44. The exhaust gas comes into contact with the upper conical shroud 453, causing it to move along the inner wall of the upper conical shroud 453. Through the principle of heat transfer, the heat in the exhaust gas is transferred to the upper conical shroud 453. Furthermore, the exhaust gas passes through the risk area between the upper conical shroud 453 and the lower conical shroud 451, increasing the contact area between the exhaust gas and the upper and lower conical shrouds 453 and 451. This results in high heat transfer efficiency between the exhaust gas and the upper and lower conical shrouds 453 and 451, which helps to cool the exhaust gas.

[0031] The lower conical hood 451 is installed directly below the upper conical hood 453, with the lower conical hood 451 suspended between the upper conical hood 453. There are three refrigeration devices 455, which are evenly distributed on the surface of the upper conical hood 453. The refrigeration devices 455 penetrate the inner wall of the tank 41 and extend to its outside. By evenly installing the refrigeration devices 455 on the surface of the upper conical hood 453, multiple refrigeration devices 455 can be used together to refrigerate the upper conical hood 453, so that the upper conical hood 453 is always kept at a low temperature. This makes it easier to prevent the exhaust gas temperature from becoming too high without cooling the exhaust gas.

[0032] The guide pipe 452 is installed vertically, and the drain outlets 454 are evenly distributed at the bottom of the surface of the guide pipe 452 and close to the lower conical cover 451.

[0033] The second embodiment is based on the first embodiment; please refer to [link / reference]. Figures 1 to 7 As shown: The dust removal mechanism 2 includes a protective box 21, which is fixedly installed on the side of the top of the base 1. A fan 22 is fixedly installed on the top of the protective box 21. A Z-shaped air duct 23 is fixedly installed on the side of the surface of the protective box 21. The air inlet at the bottom of the right-angle pipe 44 is connected to the air outlet of the Z-shaped air duct 23. The Z-shaped air duct 23 penetrates the surface of the protective box 21 and extends into its interior. A dust collection box 24 is fixedly installed at the bottom of the inner cavity of the protective box 21. A cyclone separator 25 is installed on the top of the dust collection box 24 and near the Z-shaped air duct 23.

[0034] The blower 22 is turned on to operate. The suction generated by the blower 22 is used to draw in the waste gas generated during the granulation of waste plastics. The waste gas is discharged into the conical duct 251 by the blower 22. Under the action of gas pressure, the waste gas passes through the conical duct 251 at high speed and enters the Z-shaped air duct 23. With the connection of the Z-shaped air duct 23, the waste gas enters the right-angle pipe 44.

[0035] The cyclone separator 25 includes a conical shroud 251. The bottom of the conical shroud 251 is fixedly installed to the top of the dust collection box 24 via a square tube. The air inlet of the conical shroud 251 penetrates the inner wall of the protective box 21 and extends to its exterior. The top of the Z-shaped air duct 23 penetrates the surface of the conical shroud 251 and extends into its interior. A guide vane 252 is fixedly installed on the conical surface inside the conical shroud 251. A conical hopper 253 is fixedly installed at one end of the Z-shaped air duct 23 extending into the conical shroud 251. A conical hopper 253 is fixedly installed on the surface of the conical hopper 253 near the guide vane 252. An elliptical ball 254 is installed inside the conical hood 251 through which exhaust gas enters at high speed. The guide vanes 252 are installed at an angle, and under the guidance of the guide vanes 252, the high-speed flowing exhaust gas forms a swirling flow. The particulate matter carried by the exhaust gas is affected by centrifugal force and moves and disperses along the conical surface inside the conical hood 251. As the particulate matter moves, under the action of its own gravity, and through the square tube connecting the conical hood 251 and the dust collection box 24, most of the moved particulate matter will fall into the dust collection box 24, thus collecting and removing dust from the particulate matter.

[0036] The air inlet of the conical hood 251 is connected to the air outlet of the fan 22. The guide vanes 252 are installed at an angle and are evenly distributed on the conical surface inside the conical hood 251.

[0037] The conical hood 251 is connected to the dust collection box 24 via a square tube. The guide vanes 252, the elliptical ball 254, and the conical hopper 253 are installed at the same height. The elliptical ball 254 is installed between the guide vanes 252 and the conical hopper 253. The smooth surface of the elliptical ball 254 is combined with fluid dynamics, which can reduce resistance and promote the flow of waste gas. This causes some of the particulate matter that comes into contact with the inner wall of the conical hood 251 to bounce back to the surface of the conical hopper 253. The conical hopper 253 is used to block and guide the bounced particulate material, causing the particulate material to fall.

[0038] The third embodiment is based on the first and second embodiments; please refer to [link / reference]. Figures 1 to 8 As shown: The purification mechanism 3 includes a tower body 31 and an activated carbon adsorber 32. The tower body 31 is fixedly installed on the top of the base 1 and near the cooler 43. The outlet of the cooler 43 is connected to the inlet on the surface of the tank 41. The outlet at the top of the surface of the tank 41 is connected to the tower body 31. The activated carbon adsorber 32 is installed on the side of the surface of the tower body 31. A bent pipe 33 connects the top of the activated carbon adsorber 32 to the top of the tower body 31. An infusion set 34 is installed on the side of the surface of the tower body 31. The outlet of the infusion set 34 penetrates the surface of the tower body 31 and extends into its interior. A spray head 35 is connected to the outlet of the infusion set 34. A conical nozzle 36 is installed at the bottom of the spray head 35. A return pipe 37 is fixedly installed on the side of the surface of the tower body 31. The bottom end of the return pipe 37... The top of the guide pipe 452 is connected to the top of the return pipe 37, which is connected to the water receiving hopper 38. When the operator starts the infusion device 34, the inlet of the infusion device 34 extends into the interior of the tower body 31, allowing the infusion device 34 to draw out some of the harmful gas reaction solution inside the tower body 31 and deliver the harmful gas reaction solution to the interior of the spray head 35. The solution is then sprayed out from the conical nozzle 36. The sprayed harmful gas reaction solution moves downward, while the waste gas moves upward. The two move in opposite directions, increasing the contact time between the waste gas and the harmful gas reaction solution and promoting the treatment of the waste gas. As the waste gas flows out from the top of the tower body 31, it enters the interior of the activated carbon adsorber 32 through the connection of the bend pipe 33, thereby purifying the waste gas again.

[0039] The inlet of the infusion set 34 penetrates the surface of the tank 41 and extends into its interior. The return pipe 37 is installed at an angle. The inner diameter of the water collection tank 38 gradually increases from top to bottom. The conical nozzle 36 sprays out the harmful gas reaction solution to spray the exhaust gas. The water collection tank 38 collects part of the sprayed solution. Under the guidance of the return pipe 37, the harmful gas reaction solution flows into the interior of the guide pipe 452 and flows out from the drain port 454 onto the surface of the upper conical cover 453. This not only absorbs the heat of the upper conical cover 453 through heat transfer, but also allows the harmful gas reaction solution to come into contact with the exhaust gas drifting between the lower conical cover 451 and the upper conical cover 453 as it continues to flow downward, thus achieving multiple functions.

[0040] As the harmful gas reaction solution flows along the upper conical hood 453 to the bottom of the inner cavity of the tank 41, the operator starts the transfer pump 42. Using the suction force of the transfer pump 42, the harmful gas reaction solution in the tank 41 is sucked out and transported to the cooler 43. The cooler 43 cools and lowers the temperature of the harmful gas reaction solution, and discharges the cooled harmful gas reaction solution into the interior of the tower 31 to form a cycle, so as to recycle and reuse the harmful gas reaction solution.

[0041] When in use, the staff first turns on the fan 22 to start working. The suction generated by the fan 22 is used to draw in the waste gas generated during the granulation of waste plastics. The waste gas is then discharged into the conical hood 251 by the fan 22. Under the action of gas pressure, the waste gas passes through the conical hood 251 at high speed and enters the Z-shaped air duct 23. With the connection of the Z-shaped air duct 23, the waste gas enters the right-angle pipe 44. Simultaneously, the exhaust gas enters the interior of the conical hood 251 at high speed. With the guide vanes 252 installed at an angle, the high-speed exhaust gas forms a swirling flow under the guidance of the guide vanes 252. The particulate matter carried by the exhaust gas is affected by centrifugal force and moves and disperses along the conical surface on the inner side of the conical hood 251. As the particulate matter moves, under the action of its own gravity, and through the square tube connecting the conical hood 251 and the dust collection box 24, most of the moved particulate matter will fall into the interior of the dust collection box 24, thus collecting and removing dust from the particulate matter. Furthermore, by installing an elliptical ball 254 between the guide vane 252 and the conical hopper 253, the smooth surface of the elliptical ball 254, combined with fluid dynamics, can reduce resistance and promote the guidance of the flowing exhaust gas. This allows some of the particulate matter that comes into contact with the inner wall of the conical guide hood 251 to bounce back to the surface of the conical hopper 253. The conical hopper 253 then blocks and guides the bounced particulate material, causing it to fall. Furthermore, the exhaust gas is transported through the right-angle pipe 44, causing it to be ejected upwards along the pipe. The exhaust gas then contacts the upper conical shroud 453, causing it to move along the inner wall of the shroud. Through the principle of heat transfer, the heat in the exhaust gas is transferred to the upper conical shroud 453. The exhaust gas passes through the gap between the upper conical shroud 453 and the lower conical shroud 451, increasing the contact area between the exhaust gas and the upper and lower conical shrouds 453 and 451. This results in high heat transfer efficiency between the exhaust gas and the upper and lower conical shrouds 453 and 451, which helps to cool the exhaust gas. By uniformly installing refrigeration devices 455 on the surface of the upper conical cover 453, multiple refrigeration devices 455 can be used together to refrigerate the upper conical cover 453, so that the upper conical cover 453 is always kept at a low temperature. This makes it easier to prevent the exhaust gas temperature from becoming too high by not cooling the exhaust gas. Furthermore, as the exhaust gas in tank 41 enters the tower 31, the operator starts the infusion set 34. The inlet of the infusion set 34 extends into the tower 31, allowing it to draw out some of the harmful gas reaction solution from the tower 31 and deliver it to the spray head 35. The solution is then sprayed out from the conical nozzle 36. The sprayed harmful gas reaction solution moves downwards, while the exhaust gas moves upwards. The opposite directions of movement increase the contact time between the exhaust gas and the harmful gas reaction solution, promoting the treatment of the exhaust gas. As the exhaust gas flows out from the top of the tower 31, it enters the activated carbon adsorber 32 through the bend pipe 33 for further purification. After the harmful gas reaction liquid is sprayed out at the conical nozzle 36 to spray the exhaust gas, the water collection tank 38 will collect part of the sprayed liquid, and under the guidance of the return pipe 37, the harmful gas reaction liquid will flow into the interior of the guide pipe 452, and the harmful gas reaction liquid will flow out from the drain port 454 onto the surface of the upper conical cover 453. The heat of the upper conical cover 453 can be absorbed through heat transfer, and the harmful gas reaction liquid can also come into contact with the exhaust gas drifting between the lower conical cover 451 and the upper conical cover 453 as it continues to flow downward. As the harmful gas reaction solution flows along the upper conical hood 453 to the bottom of the inner cavity of the tank 41, the operator starts the transfer pump 42. Using the suction force of the transfer pump 42, the harmful gas reaction solution in the tank 41 is sucked out and transported to the cooler 43. The cooler 43 cools and lowers the temperature of the harmful gas reaction solution, and discharges the cooled harmful gas reaction solution into the interior of the tower 31 to form a cycle, so as to recycle and reuse the harmful gas reaction solution.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste plastic granulation off-gas treatment apparatus, characterized by, include: A base (1) and a dust removal mechanism (2) installed on the top side of the base (1), wherein a purification mechanism (3) is installed on the top of the base (1) and at the end away from the dust removal mechanism (2). The refrigeration mechanism (4) includes a tank (41) and a delivery pump (42). The tank (41) is fixedly installed at the middle of the top of the base (1). The delivery pump (42) is fixedly installed at the top of the base (1) and close to the tank (41). A cooler (43) is fixedly installed on the outer surface of the tank (41) and close to the delivery pump (42). A right-angle pipe (44) is fixedly connected at the middle of the bottom of the inner cavity of the tank (41). A cooling component (45) is installed at the top of the inner cavity of the tank (41). The cooling component (45) includes a lower conical shroud (451) and a guide pipe (452). The center of the inner cavity of the lower conical shroud (451) is fixedly installed with the top of the surface of the right-angle pipe (44). The guide pipe (452) is fixedly installed at the center of the top of the tank (41). An upper conical shroud (453) is fixedly installed at the bottom of the guide pipe (452). A drain outlet (454) is provided at the bottom of the surface of the guide pipe (452) and near the lower conical shroud (451). A refrigeration appliance (455) is installed between the surface of the upper conical shroud (453) and the inner wall of the tank (41).

2. The waste gas treatment equipment for waste plastic granulation according to claim 1, characterized in that: The right-angle pipe (44) penetrates the bottom of the inner cavity of the tank (41) and extends to its outside. The inlet end of the delivery pump (42) penetrates the bottom of the tank (41) and extends to its inside. The outlet at the top of the delivery pump (42) is connected to the inlet at the bottom of the cooler (43).

3. The waste gas treatment equipment for waste plastic granulation according to claim 1, characterized in that: The lower conical cover (451) is installed directly below the upper conical cover (453), and the lower conical cover (451) and the upper conical cover (453) are suspended between them. There are three refrigeration appliances (455), and the three refrigeration appliances (455) are evenly distributed on the surface of the upper conical cover (453). The refrigeration appliances (455) penetrate the inner wall of the tank (41) and extend to its outside.

4. The waste gas treatment equipment for waste plastic granulation according to claim 1, characterized in that: The guide pipe (452) is installed vertically, and the drain outlets (454) are evenly distributed at the bottom of the surface of the guide pipe (452) and close to the lower conical cover (451).

5. The waste gas treatment equipment for waste plastic granulation according to claim 1, characterized in that: The dust removal mechanism (2) includes a protective box (21), which is fixedly installed on the side of the top of the base (1). A fan (22) is fixedly installed on the top of the protective box (21). A Z-shaped air duct (23) is fixedly installed on the side of the surface of the protective box (21). The air inlet at the bottom of the right-angle pipe (44) is connected to the air outlet of the Z-shaped air duct (23). The Z-shaped air duct (23) penetrates the surface of the protective box (21) and extends into its interior. A dust collection box (24) is fixedly installed at the bottom of the inner cavity of the protective box (21). A cyclone separator (25) is installed on the top of the dust collection box (24) and near the Z-shaped air duct (23).

6. The waste gas treatment equipment for waste plastic granulation according to claim 5, characterized in that: The cyclone separator (25) includes a conical shroud (251). The bottom of the conical shroud (251) is fixedly installed between the top of the dust collection box (24) and the bottom of the conical shroud (251). The air inlet end of the conical shroud (251) penetrates the inner wall of the protective box (21) and extends to its outside. The top end of the Z-shaped air duct (23) penetrates the surface of the conical shroud (251) and extends to its inside. A guide vane (252) is fixedly installed on the conical surface inside the conical shroud (251). A conical bucket (253) is fixedly installed at one end of the Z-shaped air duct (23) extending into the conical shroud (251). An elliptical ball (254) is fixedly installed on the surface of the conical bucket (253) near the guide vane (252).

7. The waste gas treatment equipment for waste plastic granulation according to claim 6, characterized in that: The air inlet of the conical hood (251) is connected to the air outlet of the fan (22). The guide vanes (252) are installed at an angle and are evenly distributed on the conical surface inside the conical hood (251).

8. The waste gas treatment equipment for waste plastic granulation according to claim 6, characterized in that: The conical hood (251) is connected to the dust collection box (24) by a square tube, and the guide vanes (252), elliptical spheres (254) and conical buckets (253) are installed at the same height.

9. The waste gas treatment equipment for waste plastic granulation according to claim 1, characterized in that: The purification mechanism (3) includes a tower body (31) and an activated carbon adsorber (32). The tower body (31) is fixedly installed on the top of the base (1) and near the cooler (43). The liquid outlet of the cooler (43) is connected to the liquid inlet on the surface of the tank (41). The gas outlet at the top of the surface of the tank (41) is connected to the tower body (31). The activated carbon adsorber (32) is installed on the side of the surface of the tower body (31). A bend pipe (33) connects the top of the activated carbon adsorber (32) to the top of the tower body (31). An infusion set (34) is installed on the side of the surface of the tower body (31). The outlet end of the infusion set (34) penetrates the surface of the tower body (31) and extends into its interior. A spray head (35) is connected to the outlet of the infusion set (34). A conical nozzle (36) is installed at the bottom of the spray head (35). A return pipe (37) is fixedly installed on the side of the surface of the tower body (31). The bottom end of the return pipe (37) is connected to the top end of the guide pipe (452). A water collection hopper (38) is connected to the top end of the return pipe (37).

10. The waste gas treatment equipment for waste plastic granulation according to claim 9, characterized in that: The inlet of the infusion set (34) penetrates the surface of the tank (41) and extends into its interior. The return pipe (37) is installed at an angle, and the inner diameter of the water receiving hopper (38) gradually increases from top to bottom.

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