Plastic granulation wastewater purification equipment

Abstract

The invention discloses plastic granulation wastewater purification equipment, and relates to the technical field of water pollution purification, the plastic granulation wastewater purification equipment comprises a water pollution purification pool, the middle part of the water pollution purification pool is provided with an alternating cylinder, and two sides of the water pollution purification pool are respectively provided with a first connecting support and a second connecting support; by arranging the flow limiting structure, standardized purification can be performed on quantitative sewage, and the interior of the cavity is not in a full-load state at the moment, so that a space is reserved for aeration and exhaust; at the aeration part, a relatively closed space is formed between the cavity and the inner wall of the alternating cylinder, the pressure in the cavity is gradually increased along with the increase of injected gas, and the pressure increase can ensure that an air flotation agent and organic matters have a better fusion air pressure environment so as to assist in achieving a better sewage purification effect; in the sewage treatment process, in order to ensure that the air pressure of the aeration environment is constant, the sewage treatment is more complete through a pressure limiting structure.

Description

Technical Field

[0001] The present invention relates to the technical field of water pollution purification, and particularly to a plastic granulation wastewater purification device. Background Art

[0002] Plastic granulation wastewater refers to the wastewater generated during the plastic granulation process, mainly from the cleaning and cooling links. The wastewater contains a large amount of suspended impurities and high-concentration organic substances, such as organic substances remaining on the plastic surface and chemical agents used during the cleaning process. In order to treat the wastewater, it is necessary to use a wastewater purification device for treatment; In the existing documents, for example, the publication number CN119707079A discloses a device for purifying and reusing the wastewater from the production of recycled plastic particles. The device for purifying and reusing the wastewater from the production of recycled plastic particles includes a reservoir. Cavities are opened on both sides of the top of the reservoir. Second chutes are opened on both sides inside the reservoir. A first chute is opened through the top of the reservoir, and the first chute communicates with the cavity. A wastewater purification and cleaning integrated mechanism is arranged inside the reservoir. By adopting the wastewater purification and cleaning integrated mechanism in the present invention, oxygen can be more efficiently dissolved and react with organic pollutants, promoting the degradation of organic substances and improving the dissolution efficiency of oxygen. At the same time, it can be flexibly adjusted according to different bottom shapes of the pool and the accumulation of silt, automatically adapting to the slope of the pool bottom, obstacles and the thickness of the silt layer, thereby improving the treatment efficiency, greatly simplifying the system structure and operation process, and reducing the coordinated work of multiple devices in the traditional wastewater treatment system; Based on the retrieval of the above patents and the discovery of the equipment in the existing technology, when deeply treating plastic granulation wastewater, it is generally purified by the air flotation technology. When applying the air flotation technology, a large number of tiny bubbles are generated. As the bubbles continuously adhere, the density of the suspended substances or oil substances gradually decreases, and finally scum is formed. During the treatment process, due to large-area treatment, the treatment effect is not good, and during the treatment, the internal pressure cannot be guaranteed to be constant during the air dissolution process, affecting the air dissolution effect. Moreover, since the equipment is an open structure, the generated waste gas cannot be collected and treated in time, polluting the environment. Summary of the Invention

[0003] The purpose of the present invention is to provide a plastic granulation wastewater purification device to solve the following technical problems: As the bubbles continuously adhere, the density of the suspended substances or oil substances gradually decreases, and finally scum is formed. During the treatment process, due to large-area treatment, the treatment effect is not good, and during the treatment, the internal pressure cannot be guaranteed to be constant during the air dissolution process, affecting the air dissolution effect. Moreover, since the equipment is an open structure, the generated waste gas cannot be collected and treated in time, polluting the environment.

[0004] The purpose of the present invention can be achieved through the following technical solutions: A plastic granulation wastewater purification device, including a water pollution purification pool, in the middle of the water pollution purification pool, a rotation cylinder is installed, and a first connection bracket and a second connection bracket are respectively installed on both sides of the water pollution purification pool; A rotating shaft, the rotating shaft is horizontally installed inside the rotation cylinder, and both ends of the rotating shaft are rotatably installed inside the first connection bracket and the second connection bracket; A rotating roller is installed on the outer side of the rotating shaft, and dividing blocks are annularly arranged on the outer side of the rotating roller, and the outer side wall of the dividing block is slidably attached to the inner wall of the rotation cylinder; Two circular guard plates with the same size as the inner diameter of the rotation cylinder are respectively fixed on the rotating shaft, and the circular guard plates are located at the two ports of the rotation cylinder, and a sealing ring is arranged between the circular guard plate and the inner wall of the rotation cylinder; Relief holes are formed in the circular guard plate, and a relief pipe is installed on the relief holes, and a pressure limiting structure is connected to the relief pipe. The pressure limiting structure includes a diversion pipe. A positioning ring is installed on the outer side of the port of the diversion pipe. A threaded plugging rod is inserted through the port of the diversion pipe. External threads are arranged in the middle of the threaded plugging rod. A nut is rotatably installed on the outer side of the threaded plugging rod, and a positioning hole is arranged in the nut; A positioning rod is inserted into the positioning hole, one end of the positioning rod is fixed on the positioning ring, and a spring is fixedly connected between the positioning ring and the nut. During the sewage treatment process, in order to ensure the constant air pressure in the aeration environment, the relief pipe is communicated with the cavity. As air enters, the air pressure inside the cavity rises, the diversion pipe is connected to the relief pipe, and as the air pressure rises, the threaded plugging rod is gradually pushed outwards along the diversion pipe. When the end of the threaded plugging rod reaches the bottom relief port of the second exhaust pipe, the excess gas is discharged through the second exhaust pipe, which can ensure the stable air pressure in the cavity to ensure more complete sewage treatment.

[0005] As a further scheme of the present invention: a diversion hole is formed in the middle of the diversion pipe, a second exhaust pipe is connected to the diversion hole, a diversion ring is fixed on the first connection bracket, a connecting pipe is rotatably arranged inside the diversion ring, a sealing ring is arranged on the contact side between the connecting pipe and the diversion ring, a gas channel is formed between the diversion ring and the connecting pipe, the second exhaust pipe is connected to the rotating ring through the connecting pipe, a rotating motor is installed on the first connection bracket, and the output shaft of the rotating motor is connected to one end of the rotating shaft through a coupling. The outer side of the diversion ring is connected to a first exhaust pipe, and a filter is installed on the first exhaust pipe.

[0006] As a further solution of the present invention: an air vent hole is provided at the bottom of the rotation cylinder, a shunt pipe is connected to the air vent hole, the shunt pipe is communicated with the main flow pipe, a mounting plate is fixed on the outer side of the water pollution purification tank, an air pump is installed on the mounting plate, the exhaust port of the air pump is communicated with the main flow pipe through a feed pipe, a check valve is arranged on the feed pipe, and the check valve direction is towards the exhaust port of the air pump. The waste gas generated after sewage treatment is discharged through the second exhaust pipe for pressure relief. The waste gas is transported through a connecting pipe to a channel composed of a rotating ring and a guiding ring, and then the waste gas is transported to a filter through the first exhaust pipe and discharged after being purified by the filter, reducing the emission of waste gas and being able to reduce the environmental pollution caused by the waste gas.

[0007] As a further solution of the present invention: a storage tank is supported and installed on the side of the water pollution purification tank through a mounting frame. The bottom pipe orifice of the storage tank is connected to the feed pipe, and a flow limiting valve is installed on the bottom pipe orifice of the storage tank. Through the operation of the air pump, air pressurized transportation can be realized, and the air flow can be transported through the feed pipe. When transporting gas through the feed pipe, the flow limiting valve is opened, and the downward flow rate of the air flotation agent can be controlled through the flow limiting valve. Under the high-speed gas transportation, the air flotation agent is carried and transported to the main flow pipe, and then shunted through the shunt pipe and transported to the cavity filled with sewage. Through aeration treatment, the air flotation agent is combined with the organic matter in the sewage to realize the treatment of the organic matter.

[0008] As a further solution of the present invention: a liquid inlet pipe is connected to one side of the water pollution purification tank, and a flow limiting structure is installed on the inner wall of the water pollution purification tank. The flow limiting structure includes a first support plate and a second support plate. The first support plate and the second support plate are installed on the inner wall of the water pollution purification tank in the vertical direction. The first support plate is located directly above the second support plate. Two sliding holes are respectively opened in the second support plate, and a first sliding rod and a second sliding rod are respectively vertically installed in the two sliding holes. A transverse rod is fixed in the middle of the first sliding rod, and the top end of the second sliding rod is fixed in the middle of the transverse rod. One end of the transverse rod is fixed with a sealing plate, and the bottom end of the first sliding rod is connected with a buoyancy plate.

[0009] As a further solution of the present invention: the flow limiting structure further includes a water inlet hole. A water inlet hole is opened on the side wall of the water pollution purification tank, and the water inlet hole is communicated with the liquid inlet pipe. The sealing plate is arranged vertically offset from the water inlet hole, and the end face of the sealing plate is closely attached to the inner wall of the water pollution purification tank.

[0010] As a further solution of the present invention: a first electrode sheet is fixed to the bottom side of the first support plate, a second electrode sheet is installed at the top end of the first sliding rod, a warning lamp is installed on the top side of the first support plate, and the first electrode sheet, the second electrode sheet, the warning lamp and the power supply are connected. In order to ensure that when the water inflow in the cavity is sufficient, during the rising process of the first sliding rod, the second electrode sheet can be lifted up. After the second electrode sheet contacts the first electrode sheet, the warning lamp can be powered on, and the power-on signal is transmitted to the control box. The control box issues an operation instruction to the rotation motor, which can drive the rotation shaft to rotate, transfer the sewage to the bottom of the conversion cylinder, and realize closed aeration. And at this time, the cavity is not in a full-load state, leaving space for aeration and exhaust.

[0011] As a further solution of the present invention: an overflow hole is provided on the other side of the water pollution purification tank, a filter hopper is fixed on the outer wall on the other side of the water pollution purification tank, the filter hopper is located on one side of the overflow hole, a filter plate is provided at the bottom side of the filter hopper, the filter plate is of an inverted V-shaped structure, and a drainage groove is provided at the bottom side of the filter hopper.

[0012] As a further solution of the present invention: a drain port and a water inlet are provided on the rotation cylinder, the drain port is located on the side close to the overflow hole, and the water inlet is located on the side close to the current-limiting structure.

[0013] As a further solution of the present invention: a control box is provided on the outer side of the first connection bracket. The control box is used to receive the electrical signal of the current-limiting structure and control the start and stop operations of the rotation motor and the air pump.

[0014] The beneficial effects of the present invention: As the polluted water is gradually poured into the cavities of the two partition blocks, in order to ensure that when the amount of sewage in the cavity reaches the standard, by setting the current-limiting structure, under the buoyancy force, the second electrode sheet can be lifted up. After the second electrode sheet contacts the first electrode sheet, the warning lamp can be powered on, and the power-on signal is transmitted to the control box. The control box issues an operation instruction to the rotation motor, which can drive the rotation shaft to rotate, transfer the sewage to the bottom of the conversion cylinder, realize closed aeration, and standardize the purification of a certain amount of sewage. And at this time, the cavity is not in a full-load state, leaving space for aeration and exhaust; At the aeration part, a relatively closed space is formed between the cavity and the inner wall of the rotation cylinder. As the injection of gas increases, the pressure in the cavity gradually rises. The pressure increase can ensure a better fusion air pressure environment for the air flotation agent and the organic matter, so as to assist in achieving a better sewage purification effect; During the sewage treatment process, in order to ensure the constant air pressure in the aeration environment, through the pressure-limiting structure, the sewage treatment can be more complete; After the waste gas generated after sewage treatment is discharged through the second exhaust pipe, the waste gas is transported through the connecting pipe into the channel composed of the rotating ring and the guiding ring, and then the waste gas is transported through the first exhaust pipe into the filter, purified and discharged through the filter, reducing the emission of waste gas and being able to reduce the environmental pollution caused by the waste gas. Brief Description of the Drawings

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 is the first perspective three-dimensional structure schematic diagram of the present invention; Figure 2 is the second perspective three-dimensional structure schematic diagram of the present invention; Figure 3 is the side sectional structure display diagram of the present invention; Figure 4 is the schematic diagram of the pressure relief pipe structure of the present invention; Figure 5 is the internal sectional display schematic diagram of the rotation cylinder; Figure 6 is the schematic diagram of the flow limiting structure; Figure 7 is the schematic diagram of the ventilation channel structure composed of the guiding ring and the rotating ring; Figure 8 is the schematic diagram of the pressure limiting structure; Figure 9 is the sectional structure schematic diagram of the pressure limiting structure; In the figures: 1, water pollution purification tank; 2, rotation cylinder; 3, drain outlet; 4, filter hopper; 5, drain groove; 6, filter plate; 7, mounting plate; 8, feed pipe; 9, storage tank; 10, air pump; 11, flow limiting valve; 12, first connection bracket; 13, rotation motor; 14, pressure limiting structure; 15, guiding ring; 16, filter; 17, first exhaust pipe; 18, flow limiting structure; 19, liquid inlet pipe; 20, shunt pipe; 21, main flow pipe; 22, second connection bracket; 23, rotating shaft; 24, pressure relief pipe; 25, dividing block; 26, rotating roller; 27, air holes; 181, first support plate; 182, warning light; 183, water inlet hole; 184, sealing plate; 185, second support plate; 186, buoyancy plate; 187, first electrode plate; 188, second electrode plate; 189, first sliding rod; 1810, second sliding rod; 141, guiding pipe; 142, positioning ring; 143, threaded sealing rod; 144, positioning rod; 145, nut; 146, spring; 147, second exhaust pipe; 151, connecting pipe; 152, rotating ring. Detailed Embodiments

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. 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.

[0018] Please refer to Figures 1-2 、 Figure 5 As shown, the present invention is a plastic granulation wastewater purification device, including a water pollution purification tank 1. A rotation cylinder 2 is installed in the middle of the water pollution purification tank 1. A first connection bracket 12 and a second connection bracket 22 are respectively installed on both sides of the water pollution purification tank 1; A rotating shaft 23 is horizontally penetrated and installed inside the rotation cylinder 2. Both ends of the rotating shaft 23 are rotatably installed in the first connection bracket 12 and the second connection bracket 22; A rotating roller 26 is installed on the outer side of the rotating shaft 23. Partition blocks 25 are installed in an annular array on the outer side of the rotating roller 26. The outer side wall of the partition block 25 is slidably attached to the inner wall of the rotation cylinder 2; Two circular guard plates with the same size as the inner diameter of the rotation cylinder 2 are respectively fixed on the rotating shaft 23. The circular guard plates are located at the two ports of the rotation cylinder 2, and a sealing ring is provided between the circular guard plates and the inner wall of the rotation cylinder 2; Please refer to Figure 4 , Figures 7-9 As shown, a pressure relief hole is opened on the circular guard plate, and a pressure relief pipe 24 is installed on the pressure relief hole. A pressure limiting structure 14 is connected to the pressure relief pipe 24. The pressure limiting structure 14 includes a diversion pipe 141. A positioning ring 142 is installed on the outer side of the port of the diversion pipe 141. A threaded plugging rod 143 is inserted through the port of the diversion pipe 141. External threads are provided in the middle of the threaded plugging rod 143. A nut 145 is rotatably installed on the outer side of the threaded plugging rod 143, and a positioning hole is provided in the nut 145; A positioning rod 144 is inserted through the positioning hole. One end of the positioning rod 144 is fixed on the positioning ring 142, and a spring 146 is fixedly connected between the positioning ring 142 and the nut 145.

[0019] Plastic granulation wastewater refers to the wastewater generated during the plastic granulation process. A guide hole is formed in the middle of the guide pipe 141, to which a second exhaust pipe 147 is connected. A guide ring 15 is fixed to the first connecting bracket 12. A connecting pipe 151 is rotatably provided on the inner side of the guide ring 15. A sealing ring is provided on the contact side between the connecting pipe 151 and the guide ring 15, forming a gas channel between the guide ring 15 and the connecting pipe 151. The second exhaust pipe 147 is connected to the rotating ring 152 via the connecting pipe 151. A rotating motor 13 is mounted on the first connecting bracket 12, and the output shaft of the rotating motor 13 is connected to one end of the rotating shaft 23 via a coupling. During the sewage treatment process, in order to ensure a constant air pressure in the aeration environment, the pressure relief pipe 24 is connected to the cavity. As air is taken in, the air pressure inside the cavity rises. The guide pipe 141 is connected to the pressure relief pipe 24. As the air pressure rises, the threaded sealing rod 143 is gradually pushed outward along the guide pipe 141. When the end of the threaded sealing rod 143 reaches the bottom pressure relief port of the second exhaust pipe 147, the excess air is discharged through the second exhaust pipe 147, which can ensure that the air pressure in the cavity is stable, thereby ensuring more complete sewage treatment. In order to adjust the pressure in the cavity, the distance between the end of the threaded sealing rod 143 and the pressure relief port can be adjusted by rotating the threaded sealing rod 143. Since the tensile force of the spring is limited by the expansion and contraction amount, when the threaded sealing rod 143 is screwed into the guide tube 141, the pressure in the cavity is adjusted to increase. When the threaded sealing rod 143 rotates around the end of the guide tube 141, the pressure in the cavity is adjusted to decrease.

[0020] See also Figure 7 As shown, the outer side of the guide ring 15 is connected to a first exhaust pipe 17 , and a filter 16 is installed on the first exhaust pipe 17 . The filter is a CECO peerless AC series product, which can adsorb organic waste gas through internal activated carbon.

[0021] See also Figures 1-2 As shown, an aeration hole 27 is provided at the bottom of the rotation drum 2, and a shunt pipe 20 is connected to the aeration hole 27, and the shunt pipe 20 is communicated with the main pipe 21. A mounting plate 7 is fixed to the outside of the water pollution purification tank 1, and an air pump 10 is installed on the mounting plate 7. The exhaust port of the air pump 10 is communicated with the main pipe 21 through a feed pipe 8. A check valve is provided on the feed pipe 8, and the check direction is toward the exhaust port of the air pump 10. When the air pump 10 operates, pressurized air delivery can be achieved, and the air flow can be delivered through the feed pipe 8. When the gas is delivered through the feed pipe 8, the flow limiting valve 11 is opened, and the downstream speed of the flotation agent can be controlled by the flow limiting valve 11. Under high-speed gas delivery, the flotation agent is carried to the main pipe 21, and is diverted and delivered to the cavity containing sewage through the shunt pipe 20. Through aeration treatment, the flotation agent is fused with organic matter in the sewage to achieve the treatment of the organic matter.

[0022] On the side of the water pollution purification tank 1, a storage tank 9 is supported and installed through a mounting frame. The bottom pipe orifice of the storage tank 9 is connected to the feed pipe 8, and a flow limiting valve 11 is installed on the bottom pipe orifice of the storage tank 9. It can store the solvent for organic matter used in aeration. During aeration, it is synchronously transported and can cooperate to achieve the purification of sewage.

[0023] Please refer to Figure 6 As shown, a liquid inlet pipe 19 is connected to one side of the water pollution purification tank 1. A flow limiting structure 18 is installed on the inner wall of the water pollution purification tank 1. The flow limiting structure 18 includes a first support plate 181 and a second support plate 185. The first support plate 181 and the second support plate 185 are installed on the inner wall of the water pollution purification tank 1 in the vertical direction. The first support plate 181 is directly above the second support plate 185. Two sliding holes are respectively opened in the second support plate 185. A first sliding rod 189 and a second sliding rod 1810 are respectively installed vertically in the two sliding holes. A transverse rod is fixed in the middle of the first sliding rod 189, and the top end of the second sliding rod 1810 is fixed in the middle of the transverse rod. One end of the transverse rod is fixed with a blocking plate 184, and the bottom end of the first sliding rod 189 is connected with a buoyancy plate 186.

[0024] The flow limiting structure 18 further includes a water inlet hole 183. The water inlet hole 183 is opened on the side wall of the water pollution purification tank 1. The water inlet hole 183 is communicated with the liquid inlet pipe 19. The blocking plate 184 is arranged up and down out of alignment with the water inlet hole 183, and the end face of the blocking plate 184 is closely attached to the inner wall of the water pollution purification tank 1.

[0025] A first electrode plate 187 is fixed on the bottom side of the first support plate 181. A second electrode plate 188 is installed at the top end of the first sliding rod 189. A warning lamp 182 is installed on the top side face of the first support plate 181. The first electrode plate 187, the second electrode plate 188, the warning lamp 182 and the power supply are connected. As the polluted water gradually fills the cavities of the two partition blocks 25, when the water level in the cavities gradually rises and is synchronized with the water level on one side in the water pollution purification tank 1, under the buoyancy force, the buoyancy plate 186 can push the first sliding rod 189 to rise under the buoyancy force. Driven by the transverse rod, it can drive the blocking plate 184 to slide upward, and can gradually realize the blocking of the water inlet hole 183; During the rising process of the first sliding rod 189, it can lift the second electrode plate 188 to rise. After the second electrode plate 188 contacts the first electrode plate 187, it can realize the power-on of the warning lamp 182. The power-on signal is transmitted to the control box, and the control box issues an operation instruction to the rotating motor 13, which can drive the rotating shaft 23 to rotate, transfer the sewage to the bottom of the conversion cylinder, and can realize closed aeration. And at this time, the cavities are not in a full-load state, leaving space for aeration exhaust.

[0026] Please refer to Figure 2As shown, an overflow hole is provided on the other side of the water pollution purification tank 1. A filter hopper 4 is fixed on the outer wall on the other side of the water pollution purification tank 1. The filter hopper 4 is located on one side of the overflow hole. A filter plate 6 is provided at the bottom side of the filter hopper 4. The filter plate 6 is of an inverted V-shaped structure. A drain trough 5 is provided at the bottom side of the filter hopper 4. As the sewage is discharged, the sewage is led out through the overflow hole on one side of the water pollution purification tank 1. The sewage falls into the filter hopper 4. After being filtered by the filter plate 6, the sewage is filtered and discharged. During the discharging process, due to the inverted V-shaped setting of the filter plate 6, when the sewage falls, the impurities slide down along the slope, avoiding the accumulation of impurities on the filtering surface of the filter plate 6, realizing continuous filtration. The filtered impurities fall to both ends of the filter hopper 4 and can be periodically pumped and discharged.

[0027] The rotation cylinder 2 is provided with a drain port 3 and a water inlet. The drain port 3 is located on the side close to the overflow hole, and the water inlet is located on the side close to the current limiting structure 18.

[0028] Please refer to Figure 1 As shown, a control box is provided on the outside of the first connection bracket 12. The control box is used to receive the electrical signal of the current limiting structure 18 and is used to control the start and stop operations of the rotation motor 13 and the air pump 10.

[0029] Working principle: When plastic granulation is carried out, cleaning wastewater will be generated, and the polluted wastewater is transported through the liquid inlet pipe 19; During the transportation, the sewage is introduced through the water inlet hole 183. When the sewage is introduced, the rotation motor 13 operates to drive the rotation shaft 23 to rotate. With the rotation of the rotation shaft 23, the rotation roller 26 can be driven to rotate, realizing the synchronous rotation of multiple dividing blocks 25; So that the position of one of the cavities corresponds to the water inlet of the rotation cylinder 2. When water enters, the sewage enters the water pollution purification tank 1, and the sewage automatically flows into the cavities of the two dividing blocks 25; As the polluted water is gradually poured into the cavities of the two dividing blocks 25, when the water level in the cavities gradually rises and the water level in the cavities is synchronized with the water level on one side in the water pollution purification tank 1, under the buoyancy effect, the buoyancy plate 186 can push the first sliding rod 189 to rise under the buoyancy. Driven by the transverse rod, the plugging plate 184 can be driven to slide upward, and the water inlet hole 183 can be gradually plugged; During the rising process of the first sliding rod 189, the second electrode plate 188 can be lifted to rise. After the second electrode plate 188 contacts the first electrode plate 187, the warning lamp 182 can be powered on, and the power-on signal is transmitted to the control box. The control box issues an operation instruction to the rotation motor 13 to drive the rotation shaft 23 to rotate; When the rotation shaft 23 rotates, the cavity filled with water can be rotated to a position communicated with the first exhaust pipe 17; By operating the air pump 10, air pressurized transportation can be achieved, and the air flow can be transported through the feed pipe 8. When transporting gas through the feed pipe 8, the flow limiting valve 11 is opened, and the downward flow rate of the air flotation agent can be controlled through the flow limiting valve 11. Under the high-speed gas transportation, the air flotation agent is carried and transported to the main pipe 21, and then is branched and transported through the branch pipe 20 into the cavity filled with sewage. Through aeration treatment, the air flotation agent is fused with the organic matter in the sewage, realizing the treatment of the organic matter. During the aeration process, a relatively closed space is formed between the cavity and the inner wall of the rotating cylinder 2. As the injection of air increases, the pressure in the cavity gradually rises. The increased pressure can ensure a better fusion air pressure environment for the air flotation agent and the organic matter, so as to assist in achieving a better sewage purification effect. During the sewage treatment process, in order to ensure the constant air pressure in the aeration environment, the pressure relief pipe 24 is connected to the cavity. As air enters and the air pressure inside the cavity rises, the diversion pipe 141 is connected to the pressure relief pipe 24. As the air pressure rises, the threaded plugging rod 143 is gradually pushed outwards along the diversion pipe 141. When the end of the threaded plugging rod 143 reaches the bottom pressure relief port of the second exhaust pipe 147, the excess air is discharged through the second exhaust pipe 147, which can ensure the stable air pressure in the cavity and ensure more complete sewage treatment. In order to adjust the pressure inside the cavity, by rotating the threaded plugging rod 143, the distance between the end of the threaded plugging rod 143 and the pressure relief port can be adjusted. Since the tensile force of the spring is limited by the amount of expansion and contraction, when the threaded plugging rod 143 is screwed into the diversion pipe 141, the pressure inside the cavity is adjusted upwards, and when the threaded plugging rod 143 rotates towards the port of the diversion pipe 141, the pressure inside the cavity is adjusted downwards. The waste gas generated after sewage treatment is discharged through the pressure relief of the second exhaust pipe 147. The waste gas is transported through the connecting pipe 151 into the channel composed of the rotating ring 152 and the diversion ring 15, and then the waste gas is transported through the first exhaust pipe 17 to the filter 16 and discharged after being purified by the filter 16, reducing the emission of waste gas and being able to reduce the pollution of the waste gas to the environment. For the wastewater after the aeration treatment, after the aeration treatment is completed, by rotating the rotating motor 13, the cavity filled with sewage rotates to the position connected to the rotating motor 13, and the sewage is discharged under its own weight. As the sewage is discharged, the sewage is led out through the overflow hole on one side of the water pollution purification pool 1, and the sewage falls into the filter hopper 4. After being filtered by the filter plate 6, the sewage is filtered and discharged. During the discharge process, since the filter plate 6 is arranged in an inverted V shape, when the sewage falls, the impurities slide down along the slope, preventing the impurities from accumulating on the filtering surface of the filter plate 6, realizing continuous filtration. The filtered impurities fall to both ends of the filter hopper 4 and can be periodically drained.

[0030] The above has described in detail an embodiment of the present invention. However, the content is only a preferred embodiment of the present invention and cannot be considered as defining the scope of implementation of the present invention. All equivalent changes and improvements made in accordance with the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. A plastic granulation wastewater purification device, characterized in that, Including: A water pollution purification tank (1), a rotation cylinder (2) is installed in the middle of the water pollution purification tank (1), and a first connection bracket (12) and a second connection bracket (22) are respectively installed on both sides of the water pollution purification tank (1); A rotating shaft (23), the rotating shaft (23) is horizontally installed inside the rotation cylinder (2), and both ends of the rotating shaft (23) are rotatably installed in the first connection bracket (12) and the second connection bracket (22); A rotating roller (26) is installed on the outer side of the rotating shaft (23), and dividing blocks (25) are installed in an annular array on the outer side of the rotating roller (26), and the outer side wall of the dividing block (25) is slidably attached to the inner wall of the rotation cylinder (2); Two circular guard plates with the same size as the inner diameter of the rotation cylinder (2) are respectively fixed on the rotating shaft (23), and the circular guard plates are located at the two ports of the rotation cylinder (2), and a sealing ring is arranged between the circular guard plates and the inner wall of the rotation cylinder (2); Relief holes are opened on the circular guard plates, and a relief pipe (24) is installed on the relief holes. A pressure limiting structure (14) is connected to the relief pipe (24). The pressure limiting structure (14) includes a diversion pipe (141). A positioning ring (142) is installed on the outer side of the port of the diversion pipe (141). A threaded plugging rod (143) is inserted through the port of the diversion pipe (141). External threads are provided in the middle of the threaded plugging rod (143). A nut (145) is rotatably installed on the outer side of the threaded plugging rod (143), and a positioning hole is arranged in the nut (145); A positioning rod (144) is inserted through the positioning hole. One end of the positioning rod (144) is fixed on the positioning ring (142), and a spring (146) is fixedly connected between the positioning ring (142) and the nut (145).

2. The plastic granulation wastewater purification equipment according to claim 1, characterized in that, A diversion hole is opened in the middle of the diversion pipe (141), and a second exhaust pipe (147) is connected to the diversion hole. A diversion ring (15) is fixed on the first connection bracket (12). A connecting pipe (151) is rotatably arranged on the inner side of the diversion ring (15). Sealing rings are arranged on the contact sides between the connecting pipe (151) and the diversion ring (15). A gas channel is formed between the diversion ring (15) and the connecting pipe (151). The second exhaust pipe (147) is connected to a rotating ring (152) through the connecting pipe (151). A rotating motor (13) is installed on the first connection bracket (12), and the output shaft of the rotating motor (13) is connected to one end of the rotating shaft (23) through a coupling.

3. The plastic granulation wastewater purification equipment according to claim 2, wherein, A first exhaust pipe (17) is connected to the outer side of the diversion ring (15), and a filter (16) is installed on the first exhaust pipe (17).

4. A plastic granulation wastewater purification device according to claim 1, characterized in that, The bottom of the rotating cylinder (2) is provided with air vent holes (27), a shunt pipe (20) is connected to the air vent holes (27), the shunt pipe (20) is communicated with the main pipe (21), an installation plate (7) is fixed on the outer side of the water pollution purification pool (1), an air pump (10) is installed on the installation plate (7), and the exhaust port of the air pump (10) is communicated with the main pipe (21) through a feed pipe (8). A check valve is arranged on the feed pipe (8), and the check direction is towards the exhaust port of the air pump (10).

5. The plastic granulation wastewater purification equipment according to claim 4, characterized in that, A storage tank (9) is supported and installed on the side of the water pollution purification pool (1) through a mounting bracket. The bottom pipe orifice of the storage tank (9) is connected to the feed pipe (8), and a flow limiting valve (11) is installed on the bottom pipe orifice of the storage tank (9).

6. The plastic granulation wastewater purification equipment according to claim 5, characterized in that, A liquid inlet pipe (19) is connected to one side of the water pollution purification pool (1). A flow limiting structure (18) is installed on the inner wall of the water pollution purification pool (1). The flow limiting structure (18) includes a first support plate (181) and a second support plate (185). The first support plate (181) and the second support plate (185) are installed on the inner wall of the water pollution purification pool (1) in the vertical direction. The first support plate (181) is located directly above the second support plate (185). Two sliding holes are respectively formed in the second support plate (185). A first sliding rod (189) and a second sliding rod (1810) are respectively installed vertically in the two sliding holes. A transverse rod is fixed in the middle of the first sliding rod (189), and the top end of the second sliding rod (1810) is fixed in the middle of the transverse rod. A sealing plate (184) is fixed at one end of the transverse rod. The bottom end of the first sliding rod (189) is connected to a buoyancy plate (186).

7. A plastic granulation wastewater purification device according to claim 6, characterized in that, The flow limiting structure (18) further includes a water inlet hole (183). A water inlet hole (183) is formed in the side wall of the water pollution purification pool (1). The water inlet hole (183) is communicated with the liquid inlet pipe (19). The sealing plate (184) is arranged vertically offset from the water inlet hole (183), and the end face of the sealing plate (184) is closely attached to the inner wall of the water pollution purification pool (1).

8. A plastic granulation wastewater purification device according to claim 6, characterized in that, A first electrode plate (187) is fixed on the bottom side of the first support plate (181). A second electrode plate (188) is installed at the top end of the first sliding rod (189). A warning lamp (182) is installed on the top side face of the first support plate (181). The first electrode plate (187), the second electrode plate (188), the warning lamp (182) and a power supply are connected.

9. The plastic granulation wastewater purification equipment according to claim 1, characterized in that, An overflow hole is arranged on the other side of the water pollution purification pool (1). A filter hopper (4) is fixed on the outer wall of the other side of the water pollution purification pool (1). The filter hopper (4) is located on one side of the overflow hole. A filter plate (6) is arranged at the bottom side of the filter hopper (4). The filter plate (6) is of an inverted V-shaped structure. A drain groove (5) is arranged at the bottom side of the filter hopper (4).

10. A plastic granulation wastewater purification device according to claim 1, characterized in that, The rotation cylinder (2) is provided with a drain port (3) and a water inlet. The drain port (3) is located on the side close to the overflow hole, and the water inlet is located on the side close to the flow limiting structure (18). A control box is arranged on the outer side of the first connecting bracket (12). The control box is used for receiving the electrical signal of the flow limiting structure (18) and controlling the start and stop operations of the rotation motor (13) and the air pump (10).

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