Cleaning device and PVB (Polyvinyl Butyral) resin production equipment

Abstract

The utility model relates to a chemical production technology, and discloses a cleaning device and PVB (Polyvinyl Butyral) resin production equipment. The device comprises a cleaning kettle body and a stirring unit located in the kettle body, at least one liquid outlet is formed in the side wall and / or the kettle bottom of the kettle body, each liquid outlet is connected with a liquid conveying pipe in a sealed mode, at least one branch pipeline is arranged at the end, located in the kettle body, of each liquid conveying pipe, and a filtering unit is arranged at the outlet end of each branch pipeline. Each filtering unit comprises a filtering assembly located at the outlet end of the corresponding branch pipeline and a spraying assembly arranged corresponding to the filtering assembly; one end of the spraying assembly is connected with the corresponding branch pipeline, the other end of the spraying assembly is of a shower head structure, and the filtering assembly is arranged on the periphery of the corresponding shower head structure in a sleeving mode; and an observation hole is formed in the cleaning kettle body. The filtering assembly and the spraying assembly are combined, the separating and cleaning effects can be improved, the cleaning frequency is reduced, cleaned materials meet the washing standard, the cleaning frequency is small, and the water consumption is low.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to a cleaning device. In addition, the utility model also relates to a PVB resin production device containing the above cleaning device. Background Art

[0002] In the production process of PVB, a polyvinyl alcohol hydrochloric acid mixed solution, n-butyraldehyde and an emulsifier are mostly used for stirring and heating. The reaction product is washed, filtered and dried to obtain a PVB resin with low residue. In the process of washing the reaction product in the PVB production process, the method of diluting with mother liquor is adopted for multiple water washings. In the process of diluting and washing with mother liquor, filter rods are used for water inlet and outlet. The filter rod device is arranged at 1 / 3 from the bottom of the water washing kettle upwards, and the position is relatively high. After each water washing, there is still a lot of liquid remaining in the water washing kettle. In order to meet the washing standard, multiple washings are required, the water consumption is large, and the water saving effect is not good; when discharging liquid, the PVB resin is easy to agglomerate, and the filtering area of the filter rod is small and easy to be blocked. Summary of the Invention

[0003] The purpose of the utility model is to overcome the problems of high water consumption and easy blockage of the water washing kettle existing in the prior art, and provide a cleaning device. During the cleaning process of the cleaning device, blockage will not occur, the cleaned materials meet the washing standard, and the number of cleaning times is small and the water consumption is low.

[0004] In addition, the utility model also provides a PVB resin production device, and the PVB materials cleaned by the device meet the washing standard, and the number of cleaning times is small and the water consumption is low.

[0005] In order to achieve the above purpose, the first aspect of the utility model provides a cleaning device, which includes a cleaning kettle body and a stirring unit located in the cleaning kettle body. At least one drain port is arranged on the side wall and / or the bottom of the cleaning kettle body. A liquid conveying pipe is hermetically connected to each drain port. At least one branch pipeline is arranged at the end of the liquid conveying pipe located in the cleaning kettle body. A filtering unit is arranged at the outlet end of each branch pipeline. The filtering unit includes a filtering component located at the outlet end of the corresponding branch pipeline and a spraying component correspondingly arranged with the filtering component; one end of the spraying component is connected to the corresponding branch pipeline, and the other end is in a shower structure. The filtering component is sleeved on the outer periphery of the corresponding shower structure; An observation hole is arranged on the cleaning kettle body.

[0006] Preferably, a discharge port is arranged on the cleaning kettle body, and an oscillating part is arranged in the discharge port; The observation hole is arranged at the top of the cleaning kettle body.

[0007] Preferably, the spraying assembly includes a housing with a spraying liquid channel formed therein. One end of the housing is in the form of the shower head structure, and the other end is provided with a fixed joint connected to the branch pipeline. The shower head structure is a shower head, and the shower head is provided with a plurality of spraying holes communicating with the spraying liquid channel and facing the filtering assembly.

[0008] Preferably, the filtering assembly includes a hollow base, a hollow connecting plate connected to the base, a filter net, and a supporting structure. The base is located on the outer periphery of the shower head structure and is connected to the outlet end of the branch pipeline or the inner wall of the cleaning kettle body. The side edges of the supporting structure and the filter net are connected to each other to form a filter cover with an open end. The open end of the filter cover is fixed on the connecting plate, so that the filter net is located on the outer periphery of the shower head.

[0009] Preferably, the connecting plate is detachably and sealingly connected to the base, a buffer gasket is arranged between the connecting plate and the base, and the filter net is a metal wire mesh.

[0010] Preferably, the stirring unit includes a stirring shaft located in the cleaning kettle body, stirring paddles located on the stirring shaft, and a driving member for driving the stirring shaft to rotate. The stirring shaft is arranged along the length direction of the cleaning kettle body.

[0011] Preferably, the stirring shaft is a hollow shaft, one end of which is connected to the driving member and the other end is open. A circulation hole is arranged on the side wall of the stirring shaft, and a bearing connecting member is arranged at one end of the stirring shaft close to the driving member;

[0012] The bearing connecting member includes a bearing sleeved on the outer periphery of the stirring shaft and a bearing seat located on the outer periphery of the bearing. A liquid circulation channel is arranged on the bearing seat, and the inlet of the liquid circulation channel is connected to the cleaning liquid supply device and the outlet is connected to the circulation hole.

[0013] Preferably, at least one filter bag is fixed at one end of the stirring paddle away from the stirring shaft, and a shaping frame is arranged in the filter bag; the filter bag is in the structure of a filter ball and / or a filter net structure.

[0014] Preferably, a coiled pipeline for cleaning is arranged in the cleaning kettle body. One side of the coiled pipeline is fixed on the inner wall of the cleaning kettle body, and the other side is provided with a through hole connected to a high-pressure liquid supply and / or gas supply device.

[0015] In the second aspect of the present invention, a PVB resin production device is provided, including the cleaning device described in the first aspect above.

[0016] Through the above technical solution, the cleaning device provided by the present utility model combines a filtering component and a spraying component. The spraying component can prevent blockage during liquid discharge, and the filtering component can separate the material and the cleaning liquid. Moreover, by observing the internal situation of the cleaning device through the observation hole, the separation and cleaning effects can be improved, and the number of cleaning times can be reduced. During the cleaning process of this cleaning device, blockage will not occur, the cleaned materials meet the washing standards, and the number of cleaning times is small and the water consumption is low. Description of the Drawings

[0017] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present utility model, but do not constitute a limitation to the present utility model. In the drawings:

[0018] Figure 1 is a schematic structural diagram of the first specific embodiment of the cleaning device in the present utility model;

[0019] Figure 2 is an enlarged view of the connection mode of the filtering component and the spraying component of the present utility model;

[0020] Figure 3 is a schematic structural diagram of a specific embodiment of the bearing connecting piece of the present utility model;

[0021] Figure 4 is a schematic structural diagram of a specific embodiment of the spraying component in the present utility model;

[0022] Figure 5 is a schematic structural diagram of a specific embodiment of the liquid delivery pipe in the present utility model;

[0023] Figure 6 is a schematic structural diagram of the second embodiment of the cleaning device in the present utility model.

[0024] Description of the Reference Numerals

[0025] 1. Cleaning kettle body; 2. Feed inlet; 3. Discharge outlet; 4. Filtering component; 4-1. Base; 4-2. Connecting plate; 4-3. Filter net; 4-4. Support structure; 4-5. Fixed bolt; 5. Liquid delivery pipe; 6. Spraying component; 6-1. Shell; 6-2. Fixed joint; 6-3. Shower head; 7. Stirring shaft; 7-1. Flow hole; 8. Stirring paddle; 9. Liquid level gauge; 10. Regulating valve; 11. Flowmeter; 12. Pipeline sight glass; 13. Filter bag; 14. Bearing connecting piece; 14-1. Bearing; 14-2. Bearing seat; 14-3. Inlet; 14-4. Sealing cover; 14-5. Stuffing box; 15. Filter rod; 16. Observation hole. Specific Embodiments

[0026] The following will describe in detail the specific embodiments of the present utility model in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present utility model, and are not used to limit the present utility model.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be an abutting connection, or the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc. is based on the direction or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features.

[0029] As described above, a basic embodiment of the present utility model provides a cleaning device, including a cleaning kettle body 1 and a stirring unit located inside the cleaning kettle body 1. At least one liquid discharge port is provided on the side wall and / or the bottom of the cleaning kettle body 1. A liquid delivery pipe 5 is hermetically connected to each liquid discharge port. At least one branch pipeline is provided at the end of the liquid delivery pipe 5 located inside the cleaning kettle body 1. A filtering unit is provided at the outlet end of each branch pipeline. The filtering unit includes a filtering component 4 located at the outlet end of the corresponding branch pipeline and a spraying component 6 corresponding to the filtering component 4; one end of the spraying component 6 is connected to the corresponding branch pipeline, and the other end is in a shower structure. The filtering component 4 is sleeved on the outer periphery of the corresponding shower structure; an observation hole 16 is provided on the cleaning kettle body 1.

[0030] In the present utility model, the cleaning kettle body 1 can be provided with corresponding feed ports 2 and discharge ports 3. For example, a feed port 2 is provided above the cleaning kettle body 1, and a discharge port 3 is provided at the bottom of the cleaning kettle body 1.

[0031] The cleaning device provided by the present utility model can be applied to the cleaning and separation of acidic and / or basic impurities in macromolecular polymers, and is particularly suitable for the water washing process of PVB resin synthesis.

[0032] The cleaning device provided by the above basic embodiment of the present utility model, refer to Figure 1 , when the cleaning device works, first add a certain amount of materials to be cleaned and the corresponding amount of cleaning liquid into the cleaning kettle body 1. During the process of adding materials, start the stirring unit to mix and clean the materials to be cleaned and the cleaning liquid. After the cleaning is completed, the cleaning liquid is discharged outside the cleaning kettle body 1 through the filtering unit arranged on the side wall and / or the bottom of the kettle; during the liquid discharging process, the cleaning liquid in the cleaning kettle body 1 flows through the filtering component 4 at the outlet end of the branch pipeline of the liquid conveying pipe 5 to the shower structure of the spraying component 6, and enters the liquid conveying pipe 5 through the shower structure and flows out. During the process of discharging the cleaning liquid, the remaining materials in the cleaning kettle body 1 can be observed through the observation hole 16. As the material concentration continuously increases, it is easy for the materials to agglomerate and block the filtering component 4; when the materials are viscous and block the filtering component 4 or the amount of discharged cleaning liquid reaches a certain amount, start the backwashing. The backwashing cleaning liquid sprays from outside the cleaning kettle body 1 through at least one branch pipeline of the liquid conveying pipe 5 towards the filtering component 4 from the shower structure of the spraying component 6 to wash the inside of the filtering component 4, and flows into the cleaning kettle body 1 through the spraying component 6 to continue cleaning the materials to be cleaned in the cleaning kettle body 1. When the impurities removed by the discharged cleaning liquid meet the standard, stop the cleaning and backwashing, and discharge the cleaned materials from the discharge port 3.

[0033] The cleaning device provided by the present utility model combines the filtering component 4 and the spraying component 6. The filtering component 4 can separate the materials and the cleaning liquid, effectively preventing the spraying component 6 from being blocked during liquid discharging. When the materials are viscous and block the filtering component 4 or the cleaning kettle body 1 operates for a certain period of time, the cleaning liquid can be sprayed from the spraying component 6 to the filtering component 4 through at least one branch pipeline of the liquid conveying pipe 5 to backwash the filtering component 4, improving the separation and cleaning effects and reducing the number of cleaning times; during the cleaning process of this cleaning device, neither the filtering component 4 nor the spraying component 6 will be blocked, the cleaned materials meet the washing standard, and the number of cleaning times is small and the water consumption is low.

[0034] In a specific embodiment of the present utility model, an outlet 3 is arranged on the cleaning kettle body 1, and an oscillating part is arranged inside the outlet 3. The oscillating part is connected to the outlet 3 by a flexible connection. By using the oscillating part to perform periodic vibration during the discharging process, it can avoid the outlet 3 being blocked during the discharging process and affecting the production efficiency; the observation hole 16 is arranged at the top of the cleaning kettle body 1, and the operation condition inside the cleaning kettle body 1 can be observed at any time during the cleaning process or the liquid discharging process, ensuring the cleaning effect while reducing the amount of cleaning liquid used.

[0035] In a specific embodiment of the present utility model, refer to Figure 4, the spraying assembly 6 includes a housing 6-1 with a spraying liquid channel provided therein. One end of the housing 6-1 is in the structure of a shower head, and the other end is provided with a fixed joint 6-2 connected to the liquid delivery pipe 5. The shower head structure is a shower head 6-3, and the shower head 6-3 is provided with a plurality of spraying holes communicating with the spraying liquid channel and facing the filtering assembly 4. When the cleaning liquid is discharged, the shower head 6-3 serves as the liquid inlet end, and the cleaning liquid enters the interior of the housing 6-1 through the shower head 6-3 and flows out through the fixed joint 6-2 connected to the liquid delivery pipe 5. When backwashing is carried out, the backwashing liquid flows into the housing 6-1 through the branch pipeline of the liquid delivery pipe 5 and is sprayed on the filtering assembly 4 through the spraying holes on the shower head 6-3. The spraying range of the shower head 6-3 is large, which can wash away the residual materials on the filtering assembly 4, improve the cleaning effect, and reduce the number of cleaning times.

[0036] In the present utility model, a liquid level gauge 9 can be arranged in the cleaning kettle body 1, or a liquid level gauge 9, a regulating valve 10, a flow meter 11, a pipeline sight glass 12, a sampling port, etc. can be arranged on the liquid delivery pipe 5, so as to control the liquid inlet volume and the liquid discharge volume during cleaning in combination with the liquid level and the liquid discharge volume in the cleaning kettle body 1, and adjust according to different materials to be cleaned, improve the cleaning effect, and reduce the consumption of the cleaning liquid.

[0037] In a specific embodiment of the present utility model, refer to Figure 2 , the filtering assembly 4 includes a hollow base 4-1, a hollow connecting plate 4-2 connected to the base 4-1, a filter screen 4-3 and a supporting structure 4-4. The base 4-1 is located on the outer periphery of the shower head structure and is connected to the outlet end of the branch pipeline or the inner wall of the cleaning kettle body 1. The side edges of the supporting structure 4-4 and the filter screen 4-3 are connected to each other to form a filter cover with one end being open, and the open end of the filter cover is fixed on the connecting plate 4-2, so that the filter screen 4-3 is located on the outer periphery of the shower head 6-3. The filtering area, filtering precision and filter screen thickness of the filter screen 4-3 can be set according to the cleaning materials. The filtering area of each small hole in the filter screen 4-3 is 0.3-0.6m 2 , the filtering precision is 1-20μm, and the filter screen thickness is 1.5-2mm. The large filtering area of the filter screen 4-3 can improve the filtering and separation efficiency during liquid discharge, and at the same time can avoid the blockage of the filter screen and improve the cleaning effect. The supporting structure 4-4 can be a stainless steel plate with multiple layers of grids, and the filter screen 4-3 is filled into each grid to prevent the filter screen 4-3 from deforming during liquid discharge.

[0038] In a specific embodiment of the present utility model, the connecting plate 4-2 and the base 4-1 are detachably and sealingly connected. The connecting plate 4-2 is fixed on the base 4-1 through a fixing bolt 4-5, which is convenient for replacing the filter screen 4-3.

[0039] A buffer gasket is provided between the connecting plate 4-2 and the base 4-1. The shape of the gasket fits the cross-section of the connecting part, which can improve the connection tightness. The shape of the base 4-1 can be adjusted according to the angle of the contact surface at the fixed position to improve the connection tightness, prevent material residue, and affect the cleaning effect. The filter screen 4-3 is a metal wire mesh, preferably a sintered mesh, which can bear a large pressure, has good straightness, and a long service life.

[0040] In a specific embodiment of the present invention, refer to Figure 5 , at least two branch pipelines are provided at one end of the liquid delivery pipe 5 located inside the cleaning kettle body 1. A spray assembly 6 and a corresponding filter assembly 4 are provided at the outlet of each branch pipeline. The fixed joint 6-2 of the spray assembly 6 is connected to the outlet of the branch pipeline, and the base 4-1 of the filter assembly 4 is connected to the side wall of the branch pipeline. The pipeline of the liquid delivery pipe 5 located inside the cleaning kettle body 1 can be designed as two branch pipelines in a Y shape. Filter rods 15 are provided in both branch pipelines. The branch pipelines and the filter rods 15 can be connected by screw threads, which is convenient for the replacement and cleaning of the filter rods 15. The filter rods 15 are sintered meshes, which can filter the backwashing liquid to avoid the solid impurities in the backwashing liquid from blocking the spray holes on the shower head 6-3, improve the cleaning effect, and reduce the number of cleaning times.

[0041] In a specific embodiment of the present invention, the stirring unit includes a stirring shaft 7 located inside the cleaning kettle body 1, stirring paddles 8 located on the stirring shaft 7, and a driving member for driving the rotation of the stirring shaft 7. The stirring shaft 7 is arranged along the length direction of the cleaning kettle body 1. A plurality of stirring paddles 8 are arranged at intervals along one end of the stirring shaft 7 close to the upper part of the discharge port 3. The radius of the stirring paddles 8 can be set to different lengths and different numbers according to needs. Specifically, the radius of the stirring paddle 8 close to the upper part of the discharge port 3 is shorter than the distance from the filtering unit, preventing the end of the stirring paddle 8 from contacting the filtering unit during the stirring process. The radius of the other stirring paddles 8 far from the filtering unit is less than the radius of the cleaning kettle body 1. Exemplarily, the reserved interval distance between the end of the stirring paddle 8 and the filtering unit is about 10-20 mm. Specifically, during cleaning or backwashing, the stirring unit can stir and drive the viscous material attached to the bottom of the kettle, avoiding dead corners during the repeated cleaning process and affecting the cleaning effect. The driving member can be a variable-frequency driving member. The stirring of the stirring unit can control the stirring speed and stirring direction (forward rotation, reverse rotation) through frequency conversion, improve the stirring effect, and reduce the number of cleaning times.

[0042] In a specific embodiment of the present invention, refer to Figure 3, the stirring shaft 7 is a hollow shaft, one end of which is connected to the driving member and the other end is open. A circulation hole 7-1 is provided on the side wall of the stirring shaft 7. A bearing connecting member 14 is provided at one end of the stirring shaft 7 close to the driving member; the bearing connecting member 14 includes a bearing 14-1 sleeved on the outer periphery of the stirring shaft 7 and a bearing seat 14-2 located on the outer periphery of the bearing 14-1. A liquid circulation channel is provided on the bearing seat 14-2. The inlet 14-3 of the liquid circulation channel is connected to the cleaning liquid supply device, and the outlet is connected to the circulation hole 7-1. The bearing connecting member 14 can improve the stability of the stirring shaft 7 during operation and prevent the stirring shaft 7 from swinging too much. During cleaning, the cleaning liquid can enter the inside of the bearing connecting member 14 from the inlet 14-3 of the liquid circulation channel provided on the bearing seat 14-2, enter the stirring shaft 7 through the circulation hole 7-1 connected to the outlet, and then be injected into the cleaning kettle body 1 from the open end of the stirring shaft 7. A plurality of circulation holes 7-1 can be provided on the side wall of the stirring shaft 7 along the length direction, and the cleaning liquid can be sprayed out from the circulation holes 7-1 to wash the material to be cleaned. The stirring shaft 7 can also be provided with only one open end above the discharge port 3; during cleaning, the cleaning liquid flowing out from the open end of the stirring shaft 7 can disperse the viscous material at the bottom while fully mixing and stirring, so that the material and the cleaning liquid are fully mixed, improving the cleaning effect and reducing the number of cleaning times. The bearing connecting member 14 also includes a sealing cover 14-4 and a stuffing box 14-5. The bearing seat 14-2 adopts packing seal, and the packing is pressed by the sealing cover 14-4 to prevent the high-pressure cleaning liquid from leaking out or flowing into the bearing 14-1, while improving the stability of the stirring shaft 7 and the cleaning effect.

[0043] In a specific embodiment of the present invention, refer to Figure 6 , at least one filter bag 13 is fixed to the end of the stirring paddle 8 far from the stirring shaft 7, and a shaping frame is arranged inside the filter bag 13. During the operation of this specific embodiment, the material to be cleaned is loaded into the filter bag 13 in advance, and then the filter bag 13 is fixed on the stirring paddle 8. The cleaning liquid is introduced to clean the material to be cleaned in the filter bag 13. When draining, most of the cleaning liquid is removed by centrifugal separation of the filter bag 13 driven by the stirring shaft 7, and the amount of the remaining cleaning liquid is very small, improving the cleaning effect and reducing the number of cleaning times. A shaping frame is arranged inside the filter bag 13, which can increase the contact area between the material to be cleaned and the cleaning liquid, and prevent the filter bag 13 from deforming and squeezing during the dehydration process, resulting in material agglomeration, and improving the cleaning effect of the material. The filter bag 13 can also be set as a filter ball structure and / or a filter mesh structure, which can make the cleaning liquid and the material fully mixed and improve the cleaning effect.

[0044] In a specific embodiment of the present utility model, a coiled pipeline for cleaning is provided inside the cleaning kettle body 1. One side of the coiled pipeline is fixed on the inner wall of the cleaning kettle body 1, and the other side is provided with a through hole connected to a high-pressure liquid supply and / or gas supply device. During cleaning, high-pressure gas can be introduced through the coiled pipeline to improve the stirring effect and make the mixture more uniform. When discharging liquid, introducing high-pressure gas can prevent material caking and blockage. The coiled pipeline can introduce high-pressure cleaning liquid during cleaning or backwashing; during cleaning, the pressurized cleaning liquid can break up the agglomerated materials, make the cleaning liquid and the materials fully mixed, and improve the cleaning effect; during backwashing, the materials remaining on the kettle wall can be washed clean, and at the same time, the viscous materials and the cleaning liquid can be fully mixed, making the single cleaning cleaner and reducing the number of cleaning times. The coiled pipeline can be a coiled tube filter, and is set in two groups, one group for liquid inlet and the other group for liquid discharge, or the liquid inlet and liquid discharge can be carried out alternately.

[0045] In a specific embodiment of the present utility model, the cleaning kettle body 1 is divided into a plurality of interconnected chambers by a perforated partition, and the perforated partition is vertically arranged with the stirring unit. The partition is provided with partition flow holes for the material to be cleaned to flow through. During cleaning, the material to be cleaned is introduced through the feed port 2 and then dispersed into each chamber through the partition flow holes, and then the cleaning liquid is introduced through the flow holes 7-1 on the filtering unit or the stirring unit. The plurality of chambers disperse the cleaning materials and then carry out cleaning, making the mixture of a small amount of materials and the cleaning liquid more uniform and the cleaning cleaner. When discharging liquid, after the cleaning liquid separates the materials and the cleaning liquid through the filtering component 4, the cleaning liquid is discharged, improving the cleaning effect and reducing the number of cleaning times.

[0046] The second aspect of the present utility model provides a PVB resin production device, including the cleaning device described in the first aspect above. The device also includes a reaction tank, a demineralized water tank, an alkaline water tank, a cleaning liquid recovery tank, a surfactant tank, a high-pressure gas tank, etc. The PVB reaction liquid material cleaned by the device meets the washing standard, and has few cleaning times and low water consumption.

[0047] As a relatively preferred specific embodiment of the present utility model, refer to Figures 1-4, the cleaning device includes a cleaning kettle body 1, a feed inlet 2, a discharge outlet 3, a filtering component 4, a liquid delivery pipe 5, a spraying component 6, a stirring shaft 7, stirring paddles 8, a liquid level gauge 9, a regulating valve 10, a flowmeter 11, a pipeline sight glass 12, a bearing connecting piece 14, and an observation hole 16. The cleaning kettle body 1 and the stirring unit located inside the cleaning kettle body 1. There are 4 drain ports provided on the bottom of the cleaning kettle body 1, and a liquid delivery pipe 5 is hermetically connected to each drain port. One end of the liquid delivery pipe 5 located inside the cleaning kettle body 1 is provided with a branch pipeline, and a filtering unit is provided at the outlet end of the branch pipeline. There are 4 filtering units arranged inside the cleaning kettle body 1. Each filtering unit includes a filtering component 4 located at the outlet end of the corresponding branch pipeline and a spraying component 6 arranged corresponding to the filtering component 4; one end of the spraying component 6 is connected to the corresponding branch pipeline, and the other end is in a shower structure. The filtering component 4 is sleeved on the outer periphery of the corresponding shower structure; a discharge outlet 3 is provided on the cleaning kettle body 1, and a vibrating part is provided inside the discharge outlet 3; the observation hole 16 is arranged at the top of the cleaning kettle body 1; the spraying component 6 includes a housing 6-1 with a spraying liquid channel arranged inside. One end of the housing 6-1 is in a shower structure, and the other end is provided with a fixed joint 6-2 connected to the liquid delivery pipe 5. The shower structure is a shower head 6-3, and the shower head 6-3 is provided with a plurality of spraying holes communicating with the spraying liquid channel and facing the filtering component 4; the filtering component 4 includes a hollow base 4-1, a hollow connecting plate 4-2 connected to the base 4-1, a filter screen 4-3, and a support structure 4-4. The base 4-1 is located on the outer periphery of the shower structure and is connected to the inner wall of the cleaning kettle body 1. The side edges of the support structure 4-4 and the filter screen 4-3 are connected to each other to form a filter cover with one end being open. The open end of the filter cover is fixed on the connecting plate 4-2, so that the filter screen 4-3 is located on the outer periphery of the shower head 6-3; the connecting plate 4-2 is detachably and hermetically connected to the base 4-1 through a fixing bolt 4-5; a buffer gasket is arranged between the connecting plate 4-2 and the base 4-1; the filter screen 4-3 is a sintered mesh; the filtering area of a single filtering hole in the filter screen 4-3 is 0.5m 2, the filtration accuracy is 15 μm, and the filter screen thickness is 1.7 mm. A liquid level gauge 9 is provided near the liquid discharge port. At the end of the liquid delivery pipe 5 of each filtration unit away from the spraying assembly 6, a regulating valve 10, a flowmeter 11, and a pipeline sight glass 12 are connected in sequence. The end of the liquid delivery pipe 5 away from the pipeline sight glass 12 is connected to a water pump and a cleaning liquid storage tank through a detachable hose; the stirring unit includes a stirring shaft 7 located in the cleaning kettle body 1, stirring paddles 8 located on the stirring shaft 7, and a variable-frequency drive motor for driving the rotation of the stirring shaft 7. The stirring shaft 7 is arranged along the length direction of the cleaning kettle body 1, and the driving member is located on the cleaning kettle body 1; there are three stirring paddles 8, which are arranged at intervals on the stirring shaft 7. Among them, the two paddles farther away from the discharge port 3 have slightly longer radii, and the stirring paddle 8 closer to the discharge port 3 is slightly shorter, and the radius is shorter than the distance from the stirring shaft 7 to the filtration unit. The stirring shaft 7 is connected to the current monitoring unit. When the current suddenly increases, the stirring is stopped or the actual current feedback data is used to adjust the motor speed according to the current data to ensure that the motor current meets the maximum current requirement of the motor and avoid excessive current affecting the stirring operation. The stirring shaft 7 is a hollow shaft, and its end away from the variable-frequency drive motor is open. A circulation hole 7-1 is provided on the side wall of the stirring shaft 7. One end of the stirring shaft 7 close to the variable-frequency drive motor is provided with a bearing connecting member 14; the bearing connecting member 14 includes a bearing 14-1 sleeved on the outer periphery of the stirring shaft 7 and a bearing seat 14-2 located on the outer periphery of the bearing 14-1. A liquid circulation channel is provided on the bearing seat 14-2. The inlet 14-3 of the liquid circulation channel is connected to the cleaning liquid supply device, and the outlet is connected to the circulation hole 7-1.

[0048] Taking the example of washing the PVB mother liquor with deionized water to remove butyraldehyde in the mother liquor in the above preferred embodiment, during operation, the PVB mother liquor is introduced through the feed port 2 and the injection is stopped when the liquid level height reaches 50% of the height of the cleaning kettle body 1. The temperature of the PVB mother liquor is 30-50 °C; the cleaning liquid is deionized water at 40-55 °C. The deionized water is introduced into the cleaning kettle body 1 through 4 filtering units. The stirring unit is started. When the liquid level height reaches 80% of the height of the cleaning kettle body 1, the introduction of deionized water is stopped. After stirring for a certain time, the water pump and the regulating valve 10 are started, and the deionized water is discharged by pumping. During the discharge of the deionized water, the PVB material in the mother liquor and the deionized water are separated by the filtering component 4 in the 4 filtering units. The deionized water flows through the spraying component 6 and the flowmeter 11 and then is discharged into the cleaning liquid collection tank for recycling. The liquid level gauge 9 monitors the liquid level in the cleaning kettle body 1, the regulating valve 10 controls the flow rate of the discharged liquid, and the flowmeter 11 records the amount of the discharged liquid; during the liquid discharge process, the state of the discharged cleaning liquid can be observed through the pipeline sight glass 12 to prevent the discharge of the PVB material. When the liquid level in the cleaning kettle body 1 reaches 20%, the liquid discharge is stopped, and the 4 filtering units and the inlets 14-3 of the liquid flow channels are connected to the deionized water tank through hoses for backwashing. The deionized water for backwashing in the filtering unit is sprayed onto the filter net 4-3 through the spraying component 6, and the PVB material attached to the surface of the filter net 4-3 is brought into the cleaning kettle body 1 together with the deionized water. The deionized water in the stirring shaft 7 enters the inside of the stirring shaft 7 through the circulation hole 7-1 and then flows out through the open end to disperse the viscous material at the bottom of the kettle. When the liquid level in the cleaning kettle body 1 reaches 50%, the introduction of deionized water is stopped. The stirring direction of the stirring unit is changed periodically, forward rotation for 1 minute and reverse rotation for 1 minute. After the deionized water is introduced, stir and wash for a certain time, and then start the regulating valve 10 and the water pump on the 4 filtering units to discharge the deionized water cleaning liquid. During the liquid discharge process, the state of the discharged cleaning liquid can be observed through the pipeline sight glass 12. When the liquid level reaches 20%, the liquid discharge is stopped. Repeat the above cleaning process until the butyraldehyde content in the deionized water cleaning liquid reaches a certain index requirement, then the cleaning can be stopped. All the cleaning liquid in the kettle is pumped out by the filtering unit, and the PVB material is discharged and collected from the discharge port 3 for other treatments.

[0049] During the cleaning process of the cleaning device provided in the above preferred embodiment, blockage will not occur, the cleaned material meets the washing standard, and the number of cleaning times is small and the water consumption is low.

[0050] As a specific embodiment of the present invention, refer to Figures 2-6, the cleaning device includes a cleaning kettle body 1, a feed inlet 2, a discharge outlet 3, a filtering component 4, a liquid delivery pipe 5, a spraying component 6, a stirring shaft 7, stirring paddles 8, a liquid level gauge 9, a regulating valve 10, a filter bag 13, a bearing connecting piece 14, a filter rod 15 and an observation hole 16. The cleaning kettle body 1 and a stirring unit located inside the cleaning kettle body 1. A plurality of liquid discharge ports are provided on the side wall and the bottom of the cleaning kettle body 1. A liquid delivery pipe 5 is hermetically connected to each liquid discharge port. At least one branch pipeline is provided at one end of the liquid delivery pipe 5 located inside the cleaning kettle body 1. A filtering unit is provided at the outlet end of each branch pipeline. There are 4 filtering units arranged inside the cleaning kettle body 1. Each filtering unit includes a filtering component 4 located in the corresponding branch pipeline and a spraying component 6 arranged corresponding to the filtering component 4; One end of the spraying component 6 is connected to the corresponding branch pipeline and the other end is in a shower structure. The filtering component 4 is sleeved on the outer periphery of the corresponding shower structure; A discharge outlet 3 is provided on the cleaning kettle body 1, and a vibrating part is arranged inside the discharge outlet 3; The observation hole 16 is arranged at the top of the cleaning kettle body 1.

[0051] At one end of the liquid delivery pipe 5 located on the side wall and inside the cleaning kettle body 1, two branch pipelines in a Y shape are arranged. A spraying component 6 and a corresponding filtering component 4 are provided at the outlet end of each branch pipeline. Filter rods 15 are arranged in both branch pipelines. The branch pipelines and the filter rods 15 are connected by screw threads; The spraying component 6 includes a shell 6-1 with a spraying liquid channel arranged inside. One end of the shell 6-1 is in a shower structure and the other end is provided with a fixed joint 6-2 connected to the outlet of the branch pipeline of the liquid delivery pipe 5. The shower structure is a shower head 6-3. A plurality of spraying holes communicating with the spraying liquid channel and facing the filtering component 4 are provided on the shower head 6-3; The filtering component 4 includes a hollow base 4-1, a hollow connecting plate 4-2 connected to the base 4-1, a filter screen 4-3 and a supporting structure 4-4. The base 4-1 is connected to the outlet end of the corresponding branch pipeline. The side edges of the supporting structure 4-4 and the filter screen 4-3 are connected to each other to form a filtering cover with one end being open. The open end of the filtering cover is fixed on the connecting plate 4-2 so that the filter screen 4-3 is located on the outer periphery of the shower head 6-3; The connecting plate 4-2 is detachably and hermetically connected to the base 4-1 through a fixing bolt 4-5; A buffer gasket is arranged between the connecting plate 4-2 and the base 4-1; The filter screen 4-3 is a sintered mesh; The filtering area of a single filtering hole in the filter screen 4-3 is 0.5m 2 , the filtering precision is 15μm, and the thickness of the filter screen is 1.7mm.

[0052] At each liquid discharge port located at the bottom of the kettle, a liquid delivery pipe 5 is hermetically connected. One end of the liquid delivery pipe 5 located inside the cleaning kettle body 1 is provided with a branch pipeline, and the filtering assembly 4 is sleeved on the outer periphery of the corresponding shower structure; the spraying assembly 6 includes a housing 6-1 with a spraying liquid channel provided therein. One end of the housing 6-1 is in the shape of a shower head structure, and the other end is provided with a fixed joint 6-2 connected to the branch pipeline of the liquid delivery pipe 5. The shower head structure is a shower head 6-3, and the shower head 6-3 is provided with a plurality of spraying holes communicating with the spraying liquid channel and facing the filtering assembly 4; the filtering assembly 4 includes a hollow base 4-1, a hollow connecting plate 4-2 connected to the base 4-1, a filter screen 4-3 and a support structure 4-4. The base 4-1 is connected to the inner wall of the cleaning kettle body 1. The side edges of the support structure 4-4 and the filter screen 4-3 are connected to each other to form a filter cover with one end being open. The open end of the filter cover is fixed on the connecting plate 4-2 so that the filter screen 4-3 is located on the outer periphery of the shower head 6-3; the connecting plate 4-2 is detachably and hermetically connected to the base 4-1 through a fixing bolt 4-5; a buffer gasket is arranged between the connecting plate 4-2 and the base 4-1; the filter screen 4-3 is a sintered mesh; the filtering area of a single filtering hole in the filter screen 4-3 is 0.5m 2 , the filtering precision is 15μm, and the thickness of the filter screen is 1.7mm.

[0053] A liquid level gauge 9 is provided near the liquid discharge port. One end of the liquid delivery pipe 5 on each filtration unit, which is far from the spraying assembly 6, is connected with a regulating valve 10. The end of the liquid delivery pipe 5 is connected to a water pump and a cleaning liquid storage tank through a detachable hose. The stirring unit includes a stirring shaft 7 located in the cleaning kettle body 1, stirring paddles 8 located on the stirring shaft 7, and a variable-frequency drive motor for driving the rotation of the stirring shaft 7. The stirring shaft 7 is arranged along the length direction of the cleaning kettle body 1, and the driving member is located on the cleaning kettle body 1. There are three stirring paddles 8, which are arranged at intervals on the stirring shaft 7. Among them, the two paddles far from the discharge port 3 have slightly longer radii, and the stirring paddle 8 near the discharge port 3 is slightly shorter, and the radius is shorter than the distance from the stirring shaft 7 to the filtration unit. One filter bag 13 is fixed at one end of the two stirring paddles 8 far from the discharge port 3 and away from the stirring shaft 7, and a shaping frame is arranged inside the filter bag 13. A total of 4 filter bags 13 are fixed, and the filter bags 13 are of a filter ball structure. The stirring shaft 7 is connected with the current monitoring unit. When the current suddenly increases, the stirring is stopped or the data is fed back through the actual current, and the motor speed is adjusted according to the current data to ensure that the motor current meets the maximum current requirement of the motor, so as to avoid excessive current affecting the stirring operation. The stirring shaft 7 is a hollow shaft, and one end thereof far from the variable-frequency drive motor is open. A circulation hole 7-1 is arranged on the side wall of the stirring shaft 7, and a bearing connecting member 14 is arranged at one end of the stirring shaft 7 near the variable-frequency drive motor. The bearing connecting member 14 includes a bearing 14-1 sleeved on the outer periphery of the stirring shaft 7 and a bearing seat 14-2 located on the outer periphery of the bearing 14-1. A liquid circulation channel is arranged on the bearing seat 14-2. The inlet 14-3 of the liquid circulation channel is connected with the cleaning liquid supply device, and the outlet is connected with the circulation hole 7-1.

[0054] Taking the cleaning device of the above specific embodiment as an example, where the PVB mother liquor is washed with water to remove butyraldehyde in the mother liquor. During operation, first, 120 - 200 L of PVB mother liquor is injected into the filter bag 13. The total amount of PVB mother liquor in the four filter bags 13 is 480 - 800 L. Then, the filter bag 13 is fixed on the stirring paddle 8. The temperature of the PVB mother liquor is 30 - 50 °C; the cleaning liquid is demineralized water at 40 - 45 °C. The demineralized water cleaning liquid enters from the open end of the stirring shaft 7 and the four filtering units (in this embodiment, 2 filtering units are respectively arranged on the side wall and the bottom of the cleaning kettle body. When the liquid level is slightly higher than the filter bag 13 near the feed port 2, that is, when the liquid level is close to submerging the filter bag 13 near the feed port 2, the introduction of demineralized water is stopped, and the stirring unit is started. During the rotation of the stirring unit, the demineralized water cleaning liquid in the PVB mother liquor is centrifuged into the cleaning kettle body 1, and then demineralized water enters the filter bag 13 again. After rinsing repeatedly for a certain period of time, the demineralized water cleaning is stopped and the demineralized water waste liquid is discharged from the discharge port 3. During the liquid discharge process, the rotation of the stirring unit can throw out the demineralized water in the filter bag 13; then, the demineralized water is switched for rinsing, and the demineralized water cleaning liquid is introduced from the open end of the stirring shaft 7 and the 4 filtering units (in this embodiment, 2 filtering units are respectively arranged on the side wall and the bottom of the cleaning kettle body). During the cleaning process, the liquid level gauge 9 monitors the liquid level. When the liquid level rises to submerge the filter bag 13 near the feed port 2, the introduction of demineralized water is stopped. After stirring for a certain period of time, the demineralized water is discharged from the discharge port 3 and the filtering units. Repeat the above cleaning process until the butyraldehyde content in the demineralized water cleaning liquid reaches a certain index requirement, then the cleaning can be stopped, all the cleaning liquid is discharged, the filter bag 13 is taken out, and the PVB material is collected for other processing.

[0055] During the cleaning process of the cleaning device provided in the above specific embodiment, blockage will not occur, the cleaned material meets the washing standard, the number of cleaning times is small, and the water consumption is low.

[0056] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited thereto. Within the technical concept scope of the present invention, various simple modifications can be made to the technical solution of the present invention, including any other suitable combination of each technical feature. These simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A cleaning device, characterized in that: The invention comprises a cleaning kettle body (1) and a stirring unit located in the cleaning kettle body (1); at least one liquid discharge port is provided on the side wall and / or the bottom of the cleaning kettle body (1); each of the liquid discharge ports is sealedly connected to a liquid delivery pipe (5); at least one branch pipeline is provided at one end of the liquid delivery pipe (5) located in the cleaning kettle body (1); a filter unit is provided at the outlet end of each branch pipeline; the filter unit comprises a filter assembly (4) located at the outlet end of the corresponding branch pipeline and a spray assembly (6) arranged corresponding to the filter assembly (4); one end of the spray assembly (6) is connected to the corresponding branch pipeline and the other end is in a shower structure; the filter assembly (4) is sleeved on the outer periphery of the corresponding shower structure; and an observation hole (16) is provided on the cleaning kettle body (1).

2. The cleaning device according to claim 1, characterized in that: The cleaning kettle body (1) is provided with a discharge port (3), and an oscillating element is provided inside the discharge port (3); the observation hole (16) is provided at the top of the cleaning kettle body (1).

3. The cleaning device according to claim 1 or 2, characterized in that: The spray assembly (6) comprises a shell (6-1) in which a spray liquid channel is provided, one end of the shell (6-1) is the shower structure, and the other end is provided with a fixed joint (6-2) connected to the branch pipeline, the shower structure is a shower head (6-3), and the shower head (6-3) is provided with a plurality of spray holes that are connected to the spray liquid channel and face the filter assembly (4).

4. The cleaning device according to claim 3, characterized in that: The filter assembly (4) comprises a hollow base (4-1), a hollow connecting plate (4-2) connected to the base (4-1), a filter screen (4-3) and a supporting structure (4-4); the base (4-1) is located at the periphery of the shower structure and is connected to the outlet end of the branch pipeline or the inner wall of the cleaning kettle body (1); the sides of the supporting structure (4-4) and the filter screen (4-3) are connected to each other to form a filter cover with an open end; the open end of the filter cover is fixed to the connecting plate (4-2) so that the filter screen (4-3) is located at the periphery of the shower head (6-3).

5. The cleaning device according to claim 4, characterized in that: The connecting plate (4-2) is detachably sealed to the base (4-1); a buffer gasket is provided between the connecting plate (4-2) and the base (4-1); and the filter screen (4-3) is a metal wire screen.

6. The cleaning device according to claim 1 or 2, characterized in that: The stirring unit comprises a stirring shaft (7) located in the cleaning kettle body (1), a stirring paddle (8) located on the stirring shaft (7) and a driving member for driving the stirring shaft (7) to rotate, and the stirring shaft (7) is arranged along the length direction of the cleaning kettle body (1).

7. The cleaning device according to claim 6, characterized in that: The stirring shaft (7) is a hollow shaft, one end of which is connected to the driving member and the other end is open. A flow hole (7-1) is provided on the side wall of the stirring shaft (7). A bearing connecting member (14) is provided at one end of the stirring shaft (7) close to the driving member. The bearing connecting member (14) comprises a bearing (14-1) sleeved on the outer periphery of the stirring shaft (7) and a bearing seat (14-2) located on the outer periphery of the bearing (14-1); a liquid circulation channel is provided on the bearing seat (14-2); an inlet (14-3) of the liquid circulation channel is connected to a cleaning liquid supply device, and an outlet is connected to the circulation hole (7-1).

8. The cleaning device according to claim 6, characterized in that: At least one filter bag (13) is fixed to one end of the stirring paddle (8) away from the stirring shaft (7), and a shaping frame is arranged inside the filter bag (13); the filter bag (13) is a filter ball structure and / or a filter mesh structure.

9. The cleaning device according to claim 1 or 2, characterized in that: A coiled pipeline for cleaning is provided in the cleaning kettle body (1); one side of the coiled pipeline is fixed to the inner wall of the cleaning kettle body (1), and the other side is provided with a through hole connected to a high-pressure liquid supply and / or gas supply device.

10. A PVB resin production equipment, characterized in that: A cleaning device comprising any one of claims 1 to 9.

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