Recovery processing device and method for bulk polymerization kettle flushing water material
By using equipment such as a separation and drying device and a grinding mill to filter, dry, and grind the rinsing water from the polymerization reactor, the problems of high labor intensity and low efficiency in the recycling and treatment of rinsing water from the polymerization reactor are solved, and efficient recycling and utilization are achieved.
Patent Information
- Application Number
- CN202511059919.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-30
- Publication Date
- 2025-11-14
AI Technical Summary
In existing technologies, the recycling and treatment of rinsing water from polymerization reactors suffers from problems such as high labor intensity, low processing efficiency, and low recycling rate.
An apparatus comprising a separation and drying device, a grinder, a cyclone separator, an extractor, and a wastewater tank is used to collect and recover lumps and powders from the washing water of the polymerization reactor through filtration, drying, and grinding processes, and to separate and dry them using dry air and suction airflow.
It reduces the labor intensity of processing the rinsing water from the polymerization reactor and improves the efficiency and utilization rate of recycling.
Smart Images
Figure CN120939620A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of rinsing water recovery technology in polymerization reactors, and is a device and method for recovering and treating rinsing water from bulk polymerization reactors. Background Technology
[0002] During the production process of bulk polyvinyl chloride (PVC) production equipment, after the polymerization reactor discharges (the polymerization product PVC) and before the next feeding (the polymerization raw material), the inner wall of the polymerization reactor needs to be rinsed with a high-pressure water flow of 30 MPa to clean the powder and lumps adhering to the reactor wall, thereby reducing the adverse effects of residual resin powder and lumps on the quality of the resin products produced in the next polymerization reactor.
[0003] During the rinsing of the polymerization reactor, an 8m... 3 The inner wall of the polymerization reactor is rinsed with water for 20 minutes. The first 2 minutes remove lumps adhering to the reactor wall, and the next 18 minutes remove powder from the reactor. The rinse water and materials are then discharged into a wastewater tank. Because the polyvinyl chloride resin produced by the bulk polymerization method has poor hydrophilicity, the lumps and powder washed out of the reactor float on the surface of the wastewater tank. Currently, the lumps or powder floating on the surface of the wastewater tank are manually retrieved for recycling. This manual retrieval and recycling method is not only labor-intensive, but the retrieved powder is also easily contaminated, and the contaminated powder can only be treated as waste.
[0004] In summary, the current methods for recycling and treating the rinsing water from the polymerization reactor suffer from high labor intensity, low processing efficiency, and low recycling rate of the rinsing water, which have become urgent technical challenges for polyvinyl chloride (PVC) manufacturers. Summary of the Invention
[0005] This invention provides a device and method for recycling and treating rinsing water from a bulk polymerization reactor, overcoming the shortcomings of the prior art. It can effectively solve the problems of high labor intensity, low processing efficiency, and low recycling rate of rinsing water produced by existing polymerization reactors.
[0006] One of the technical solutions of this invention is achieved through the following measures: a recycling and treatment device for rinsing water from a bulk polymerization reactor, comprising a separation and drying device, a grinding mill, a cyclone separator, an extractor, and a wastewater tank. A water input pipeline is fixedly installed on the upper part of the separation and drying device, with its outlet corresponding to the top of the separation and drying device. A drain pipeline is fixedly connected to the lower outlet of the separation and drying device, with its outlet corresponding to the top of the wastewater tank. A dry air pipeline is fixedly connected to the lower inlet of the separation and drying device. A dry material extraction pipeline is installed on the upper part of the separation and drying device, with its outlet fixedly connected to the lower inlet of the grinding mill. A powder conveying pipeline is fixedly connected between the upper outlet of the grinding mill and the lower inlet of the cyclone separator. A powder recovery pipeline is fixedly connected to the bottom outlet of the cyclone separator. An exhaust pipeline is fixedly connected to the upper outlet of the cyclone separator, and an extractor is fixedly installed on the exhaust pipeline.
[0007] The following are further optimizations and / or improvements to the above-mentioned technical solution: The aforementioned separation and drying device includes a water tank, which is box-shaped with an open top. An air inlet is provided on the lower part of the left wall of the water tank, and a drying air pipeline is fixedly connected to the air inlet. A drain outlet is provided on the lower part of the right wall of the water tank corresponding to the air inlet, and a drain pipeline is fixedly connected to the drain outlet.
[0008] The aforementioned separation and drying device also includes a block material filter tank and a fine material filter screen. The block material filter tank is embedded in the upper left side of the water tank. The bottom of the block material filter tank is the block material filter screen. A fine material filter screen is laid flat and fixed in the water tank between the bottom of the block material filter screen and the top of the air inlet. A filter screen fixing bracket is provided at the bottom of the fine material filter screen. A partition plate is vertically fixed on the filter screen fixing bracket in the water tank corresponding to the lower right position of the block material filter tank.
[0009] The inlet end of the aforementioned dry material extraction pipeline extends to the upper surface of the fine material filter screen.
[0010] The mesh size of the block material filter screen is smaller than that of the fine material filter screen.
[0011] The upper inner side of the front and rear walls of the aforementioned water tank is fixedly installed with sliding guide rails running from the left end to the right end of the water tank, and several rollers are fixedly installed on the outer side of the front and rear walls of the block material filter tank corresponding to the sliding guide rails.
[0012] The four corners of the bottom of the water tank are each fixedly equipped with casters.
[0013] A first control valve is fixedly installed on the water input pipeline, a second control valve is fixedly installed on the dry material extraction pipeline, and a blower, a third control valve, and a pressure gauge are fixedly installed sequentially along the medium flow direction on the drying air pipeline.
[0014] The aforementioned device also includes a controller, and the extractor, first control valve, second control valve, blower, third control valve, and pressure gauge are all connected to the controller.
[0015] The second technical solution of the present invention is achieved through the following measures: a method for recovering and treating flushing water from a bulk polymerization reactor, comprising: To filter the lumpy material, open the first control valve. The rinsing water produced from the polymerization reactor first enters the lumpy material filter tank of the separation and drying device through the water input pipeline for filtration. The lumpy plastics are collected at the top of the lumpy material filter screen. After filtering out the lumps in the rinsing water, the separation and drying device is moved to the left. The rinsing water is then filtered through the fine material filter screen. The finer plastics are collected at the top of the fine material filter screen. The filtrate filtered by the lumps filter screen and the fine material filter screen is collected at the bottom of the water tank and discharged into the wastewater pool for buffering. After the fine material is dried and the filtrate at the bottom of the water tank is drained, the blower is started and dry air (or hot air) enters the water tank through the dry air pipeline to blow and dry the finer plastics on the upper part of the fine material filter screen. Then the block material filter tank is removed from the water tank and the block plastics in the block material filter tank are collected as waste. For fine material recovery, the extractor is started, and the suction airflow in the dry material extraction pipeline draws all the dry and fine plastics from the upper part of the fine material filter screen into the grinder for grinding. The resulting plastic powder enters the cyclone separator through the powder conveying pipeline for plastic powder collection. The plastic powder at the bottom of the cyclone separator is discharged through the powder recovery pipeline for bagging and recycling.
[0016] This invention collects, separates, and recycles the rinsing water produced by the polymerization reactor, reducing the labor intensity of processing the rinsing water, improving the efficiency of rinsing water recycling, and increasing the recycling rate of the rinsing water. Attached Figure Description
[0017] Appendix Figure 1 This is a schematic diagram of the process flow of the present invention.
[0018] Appendix Figure 2 This is a schematic diagram of the main structure of the separation and drying device of the present invention.
[0019] Appendix Figure 3 This is a schematic diagram of the left side of the separation and drying device of the present invention.
[0020] Appendix Figure 4 This is a top view of the block filter screen structure of the present invention.
[0021] Appendix Figure 5 This is a top view of the fine material filter screen structure of the present invention.
[0022] Appendix Figure 6This is a top view of the filter fixing bracket of the present invention.
[0023] The codes in the attached diagram are as follows: 1 is a grinder, 2 is a cyclone separator, 3 is an extractor, 4 is a wastewater tank, 5 is a water-material input pipeline, 6 is a drain pipeline, 7 is a dry air pipeline, 8 is a dry material extraction pipeline, 9 is a powder conveying pipeline, 10 is a powder recovery pipeline, 11 is an exhaust pipeline, 12 is a roller, 13 is a water tank, 14 is a block material filter tank, 15 is a fine material filter screen, 16 is a block material filter screen, 17 is a filter screen fixing bracket, 18 is a partition plate, 19 is an air inlet, 20 is a drain outlet, 21 is a sliding guide rail, 22 is a caster wheel, 23 is the first control valve, 24 is the second control valve, 25 is a blower, 26 is the third control valve, and 27 is a pressure gauge. Detailed Implementation
[0024] The present invention is not limited to the following embodiments, and specific implementation methods can be determined according to the technical solutions and actual conditions of the present invention.
[0025] Unless otherwise specified, all equipment and apparatus used in this invention are existing, publicly known, and commonly used equipment and apparatus in the field.
[0026] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 , 2 The layout is described using the methods of numbers 1, 2, 3, 4, 5, and 6. The positional relationships, such as front, back, top, bottom, left, and right, are based on the instructions attached. Figure 1 , 2 The orientation of the layout is determined by the directions of numbers 3, 4, 5, and 6.
[0027] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1: As shown in the attached document Figure 1 As shown, the recycling and treatment device for the rinsing water of the polymerization reactor in the bulk polymerization method includes a separation and drying device, a grinding mill 1, a cyclone separator 2, an extractor 3, and a wastewater tank 4. A water input pipeline 5 is fixedly installed on the upper part of the separation and drying device, and the outlet of the water input pipeline 5 corresponds to the top of the separation and drying device. A drain pipeline 6 is fixedly connected to the lower outlet of the separation and drying device, and the outlet of the drain pipeline 6 corresponds to the top of the wastewater tank 4. A dry air pipeline 7 is fixedly connected to the lower inlet of the separation and drying device. A dry material extraction pipeline 8 is installed on the upper part of the separation and drying device, and the outlet of the dry material extraction pipeline 8 is fixedly connected to the lower inlet of the grinding mill 1. A powder conveying pipeline 9 is fixedly connected between the upper outlet of the grinding mill 1 and the lower inlet of the cyclone separator 2. A powder recovery pipeline 10 is fixedly connected to the bottom outlet of the cyclone separator 2. An exhaust pipeline 11 is fixedly connected to the upper outlet of the cyclone separator 9, and an extractor 3 is fixedly installed on the exhaust pipeline 11.
[0028] As needed, the separation and drying device performs block filtration and fine filtration separation on the rinsing water of the bulk polymerization reactor. Then, the separated fine material is dried. The extractor 3 provides suction airflow power to draw the fine material in the separation and drying device into the grinder 1 for grinding into powder. The powder then enters the cyclone separator 2 for powder collection. This reduces the labor intensity of recycling the rinsing water of the polymerization reactor, improves the recycling efficiency of the rinsing water of the polymerization reactor, and also improves the recycling rate of the rinsing water of the polymerization reactor.
[0029] The above-mentioned recycling and treatment device for the flushing water of the bulk polymerization reactor can be further optimized and / or improved according to actual needs: Example 2: Its difference from Example 1 is as follows: (See attached) Figure 1 , 2 As shown in Figure 3, the separation and drying device includes a water tank 13, which is a box-shaped structure with an open top. An air inlet 19 is provided on the lower part of the left wall of the water tank 13, and the air inlet 19 is fixedly connected to a drying air pipeline 7. A drain outlet 20 is provided on the lower part of the right wall of the water tank 13 corresponding to the air inlet 19, and the drain outlet 20 is fixedly connected to a drain pipeline 6.
[0030] Example 3: Its difference from Examples 1 to 2 is as follows: (See attached) Figure 2 , 3 As shown in Figures 4, 5, and 6, the separation and drying device also includes a block material filter tank 14 and a fine material filter screen 15. The block material filter tank 14 is embedded in the upper left side of the water tank 13. The bottom of the block material filter tank 14 is a block material filter screen 16. The fine material filter screen 15 is laid flat and fixed in the water tank 13 between the bottom of the block material filter screen 16 and the top of the air inlet 19. A filter screen fixing bracket 17 is provided at the bottom of the fine material filter screen 15. A partition plate 18 is vertically fixed on the filter screen fixing bracket 17 in the water tank 13 corresponding to the lower right position of the block material filter tank 14.
[0031] As required, as attached Figure 2 As shown, partition 18 is a partition that divides the water tank 13 into left and right sections. Block filter screen 16 can collect plastics with a maximum diameter of 50mm or more. (See attached image) Figure 5 , 6 As shown, the fine material filter screen 15 can be divided into two independent fine material filter screens 15, which are easy to disassemble and clean. The two independent fine material filter screens 15 are fixed on the filter screen fixing bracket 17. The fine material filter screen 15 has a filtration mesh of 60 mesh, which can collect finer plastic powder.
[0032] Example 4: Its difference from Examples 1 to 3 is as follows: (See attached) Figure 1 , 2 As shown, the inlet end of the dry material extraction pipeline 8 extends to the upper surface of the fine material filter screen 15.
[0033] As needed, the inlet end (suction end) of the dry material extraction pipeline 8 can suck the fine material (fine dry material) collected on the upper part of the fine material filter screen 15 into the grinder 1 to be ground into powder.
[0034] Example 5: It differs from Examples 1 to 4 in that, as shown in the appendix... Figure 4 , 5 As shown, the mesh size of the block filter screen 16 is smaller than that of the fine filter screen 15.
[0035] Example 6: Its difference from Examples 1 to 5 is as follows: (See attached) Figure 2 , 3 As shown, a sliding guide rail 21 is fixedly installed on the upper inner side of the front and rear walls of the water tank 13, running from the left end to the right end of the water tank 13. Several rollers 12 are fixedly installed on the outer side of the front and rear walls of the block material filter tank 14 corresponding to the sliding guide rail 21.
[0036] As needed, the block material filter tank 14 can move freely left and right within the water tank 13 via the sliding guide rail 21, or the block material filter tank 14 can be removed from the water tank 13.
[0037] Example 7: Its difference from Examples 1 to 6 is as follows: (See attached) Figure 2 , 3 As shown, casters 22 are fixedly installed at the four corners of the bottom of the water tank 13.
[0038] As needed, the universal casters 22 can be used to move the separation and drying device to the outlet of the water inlet pipeline 5. The universal casters 22 can have a braking function to fix the separation and drying device.
[0039] Example 8: It differs from Examples 1 to 7 in that: as shown in the appendix Figure 1 As shown, a first control valve 23 is fixedly installed on the water input pipeline 5, a second control valve 24 is fixedly installed on the dry material extraction pipeline 8, and a blower 25, a third control valve 26, and a pressure gauge 27 are fixedly installed on the drying air pipeline 7 along the medium flow direction.
[0040] As needed, the dry material extraction line 8 between the second control valve 24 and the fine material filter screen 15 can be a soft plastic tube to facilitate the absorption of finer plastics from the upper part of the fine material filter screen 15.
[0041] Example 9: It differs from Examples 1 to 8 in that: as shown in the appendix Figure 1 As shown, the device also includes a controller, and the extractor 3, the first control valve 23, the second control valve 24, the blower 25, the third control valve 26 and the pressure gauge 27 are all connected to the controller.
[0042] Depending on the needs, the pipelines and equipment of the bulk polymerization reactor rinsing water recovery and treatment device may also be equipped with conventional valves, thermometers, and pressure gauges known in the art, according to production requirements. The controller is a PLC controller, which is equipped with a Yokogawa CS3000 DCS control system.
[0043] Example 10: It differs from Examples 1 to 9 in that, as shown in the appendix... Figure 1 , 2 As shown in Figures 3, 4, 5, and 6, the method for recycling and treating the flushing water from the bulk polymerization reactor includes: To filter the lumpy material, open the first control valve 23. The rinsing water produced by the polymerization reactor first enters the lumpy material filter tank 14 of the separation and drying device through the water input pipeline 5 for filtration. The upper part of the lumpy material filter screen 16 collects the lumpy plastics. After filtering out the lumps in the rinsing water, the separation and drying device is moved to the left. The rinsing water is then filtered through the fine material filter screen 15. The finer plastics are collected at the top of the fine material filter screen 15. The filtrate filtered by the lumps filter screen 16 and the fine material filter screen 15 is collected at the bottom of the water tank 13 and discharged into the wastewater pool 4 for buffering. After the fine material is dried and the filtrate at the bottom of the water tank 13 is drained, the blower 25 is started and the dry air (or hot air) enters the water tank 13 through the dry air pipeline 7 to blow and dry the finer plastics on the upper part of the fine material filter screen 15. Then the block material filter tank 14 is taken out of the water tank 13 and the block plastics in the block material filter tank 14 are collected as waste. For fine material recovery, the extractor 3 is started, and the suction airflow in the dry material extraction pipeline 8 draws all the dry and fine plastics on the upper part of the fine material filter screen 15 into the grinder 1 for grinding. The resulting plastic powder enters the cyclone separator 2 through the powder conveying pipeline 9 for plastic powder collection. The plastic powder at the bottom of the cyclone separator 2 is discharged through the powder recovery pipeline 10 for bagging and recycling.
[0044] This invention sequentially filters the rinsing water from the polymerization reactor into block material and then into fine material. A blower 25 then blows hot air at 40°C to 60°C into the water tank 13 through a drying air pipeline 7. The hot air pressure in the drying air pipeline 7 is 3 kPa, which blows and dries the fine material on the upper part of the fine material filter screen 15. This dries the fine material (with a moisture content between 20% and 25%) on the upper part of the fine material filter screen 15 to a moisture content below 3%. After the moisture content of the fine material meets the process requirements, it is ground and recycled. This reduces the labor intensity of processing the rinsing water from the polymerization reactor, improves the efficiency of recycling the rinsing water from the polymerization reactor, and also increases the recycling rate of the rinsing water from the polymerization reactor.
[0045] In summary, the above technical features constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the requirements of different situations.
Claims
1. A device for recycling and treating flushing water from a bulk polymerization reactor, characterized in that... The system includes a separation and drying unit, a grinding mill, a cyclone separator, an extractor, and a wastewater tank. A water input pipeline is fixedly installed at the top of the separation and drying unit, with its outlet corresponding to the top of the unit. A drain pipeline is fixedly connected to the bottom outlet of the separation and drying unit, with its outlet corresponding to the top of the wastewater tank. A drying air pipeline is fixedly connected to the bottom inlet of the separation and drying unit. A dry material extraction pipeline is installed at the top of the separation and drying unit, with its outlet fixedly connected to the bottom inlet of the grinding mill. A powder conveying pipeline is fixedly connected between the top outlet of the grinding mill and the bottom inlet of the cyclone separator. A powder recovery pipeline is fixedly connected to the bottom outlet of the cyclone separator. An exhaust pipeline is fixedly connected to the top outlet of the cyclone separator, and an extractor is fixedly installed on the exhaust pipeline.
2. The device for recycling and treating flushing water from bulk polymerization reactors according to claim 1, characterized in that... The separation and drying device includes a water tank, which is box-shaped with an open top. An air inlet is provided on the lower part of the left wall of the water tank, and a drying air pipeline is fixedly connected to the air inlet. A drain outlet is provided on the lower part of the right wall of the water tank corresponding to the air inlet, and a drain pipeline is fixedly connected to the drain outlet.
3. The device for recycling and treating flushing water from bulk polymerization reactors according to claim 1 or 2, characterized in that... The separation and drying device also includes a block material filter tank and a fine material filter screen. The block material filter tank is embedded in the upper left side of the water tank. The bottom of the block material filter tank is the block material filter screen. The fine material filter screen is laid flat and fixed in the water tank between the bottom of the block material filter screen and the top of the air inlet. The bottom of the fine material filter screen is provided with a filter screen fixing bracket. The water tank corresponding to the lower right side of the block material filter tank is provided with a partition that is vertically fixed on the filter screen fixing bracket.
4. The device for recycling and treating flushing water from bulk polymerization reactors according to claim 1, 2, or 3, characterized in that... The inlet end of the dry material extraction pipeline extends to the upper surface of the fine material filter screen.
5. The device for recycling and treating flushing water from bulk polymerization reactors according to claim 4, characterized in that... The mesh size of a block filter screen is smaller than that of a fine filter screen.
6. The apparatus for recycling and treating flushing water from bulk polymerization reactors according to any one of claims 2 to 5, characterized in that... The upper inner side of the front and rear walls of the water tank is fixedly installed with sliding guide rails running from the left end to the right end of the water tank. Several rollers are fixedly installed on the outer side of the front and rear walls of the block material filter tank corresponding to the sliding guide rails.
7. The device for recycling and treating flushing water from bulk polymerization reactors according to claim 6, characterized in that... The bottom of the sink is fixed with casters at each of the four corners.
8. The apparatus for recycling and treating flushing water from bulk polymerization reactors according to any one of claims 1 to 7, characterized in that... A first control valve is fixedly installed on the water input pipeline, a second control valve is fixedly installed on the dry material extraction pipeline, and a blower, a third control valve, and a pressure gauge are fixedly installed sequentially along the medium flow direction on the drying air pipeline.
9. The device for recycling and treating flushing water from bulk polymerization reactors according to claim 8, characterized in that... It also includes a controller, an extractor, a first control valve, a second control valve, a blower, a third control valve, and a pressure gauge, all of which are connected to the controller.
10. A method for recovering and treating the flushing water from the bulk polymerization reactor of the apparatus according to claim 9, comprising: To filter the lumpy material, open the first control valve. The rinsing water produced from the polymerization reactor first enters the lumpy material filter tank of the separation and drying device through the water input pipeline for filtration. The lumpy plastics are collected at the top of the lumpy material filter screen. After filtering out the lumps in the rinsing water, the separation and drying device is moved to the left. The rinsing water is then filtered through the fine material filter screen. The finer plastics are collected at the top of the fine material filter screen. The filtrate filtered by the lumps filter screen and the fine material filter screen is collected at the bottom of the water tank and discharged into the wastewater pool for buffering. After the fine material is dried and the filtrate at the bottom of the water tank is drained, the blower is started and dry air (or hot air) enters the water tank through the dry air pipeline to blow and dry the finer plastics on the upper part of the fine material filter screen. Then the block material filter tank is removed from the water tank and the block plastics in the block material filter tank are collected as waste. For fine material recovery, the extractor is started, and the suction airflow in the dry material extraction pipeline draws all the dry and fine plastics from the upper part of the fine material filter screen into the grinder for grinding. The resulting plastic powder enters the cyclone separator through the powder conveying pipeline for plastic powder collection. The plastic powder at the bottom of the cyclone separator is discharged through the powder recovery pipeline for bagging and recycling.