Rotary vacuum filter

Abstract

The utility model relates to a rotary vacuum filter which solves the problem that the existing chemical material filtering efficiency is low. Comprising a machine frame, a shell, a rotary drum, a rotary drum driving motor and a discharging device, the shell is arranged in a sealed mode, a feeding port is formed in the shell, rotary shafts are arranged at the two ends of the rotary drum, the rotary drum is rotationally arranged in the shell through the rotary shafts, a filter cloth support is arranged on the rotary drum, filter cloth is arranged on the filter cloth support, a tube nest communicated with the rotary drum is arranged in the rotary drum, and an outlet of the tube nest is located in the rotary shafts. A distribution head is fixedly arranged on the shell or the rack, a distribution pipe is arranged on the outer side of the distribution head, the rotating shaft is in sealed rotating connection with the distribution head, and a filter cake outlet is formed in the shell. A material is fed into the shell through the feeding port, filtrate enters the tube nest, the first vacuum pump extracts the filtrate from the filtrate outlet, filter residues form a filter cake on the filter cloth while the filtrate is extracted, and then gas can be introduced into the distribution pipe to reversely blow the filter cake to the filter cake outlet for collection, so that the filter cake is convenient to clean; continuous filtering can be realized, and the production efficiency is high.

Description

Technical Field

[0001] The utility model relates to the field of chemical filtering, in particular to a rotary vacuum filter. Background Art

[0002] In the fields of polyolefins, polyphenylene ether (PPO), polyphenylene ether (PPE), polyphenylene sulfide (PPS), ABS, polyarylether (PAE), chlorosilane, bisphenol A, PTA, etc., filtration is usually required during the production process. The existing filtration method is usually through centrifugal filtration. After the filtration is completed, the filter residue in the filter cartridge needs to be removed before the next round of filtration. Therefore, the filter residue is inconvenient to clean, continuous filtration cannot be performed, and the production efficiency is low. Utility Model Content

[0003] The utility model aims to solve the problem of low filtering efficiency of existing chemical materials.

[0004] The technical solution adopted to solve the technical problems raised by the utility model is as follows: the feeding rotary vacuum filter of the utility model comprises a frame, a shell, a drum, a drum driving motor and a discharging device, the shell is sealed, the shell is located on the frame, a feed port is provided on the shell, shafts are provided at both ends of the drum, the drum is arranged in the shell through the rotation of the shaft, the drum driving motor drives the drum to rotate in the shell, a filter cloth bracket is provided on the drum, a filter cloth is provided on the filter cloth bracket, a tube array connected to the drum is provided in the drum, the tube array outlet is located in the shaft, a distribution head is fixedly provided on the shell or the frame, more than one distribution pipe connected to the tube array is provided on the outside of the distribution head, the shaft is sealed and rotatably connected to the distribution head, the distribution pipe also includes a filtrate outlet, a first vacuum pump is provided on the filtrate outlet, and a filter cake outlet is provided in the shell.

[0005] The technical solutions further defining the utility model include:

[0006] Two or more tube arrays are evenly arranged with the drum as the center, and the tube arrays are connected with the drum through a connecting pipe.

[0007] A liquid storage bin is provided at the bottom of the shell, the bottom of the drum is located in the liquid storage bin, a washing area and a drying area are provided in sequence on the upper inner part of the shell along the rotation direction of the drum, the washing area and the drying area are located above the liquid storage bin, the filter cake outlet is arranged corresponding to the bottom of the drying area, a filter cake washing port is provided on the shell corresponding to the washing area, the distribution pipe also includes a washing liquid outlet and a pre-drying gas-liquid outlet, the washing liquid outlet is provided with a second vacuum pump, and the pre-drying gas-liquid outlet is provided with a third vacuum pump.

[0008] The distribution pipe also includes a back-blowing unloading air inlet, and the unloading device is a back-blowing unloading air inlet.

[0009] The discharging device is a scraper, one end of the scraper is arranged corresponding to the bottom of the drum in the drying area, and the other end of the scraper is arranged corresponding to the filter cake outlet.

[0010] The shell body is also provided with a filter cloth cleaning port, which is located between the drying area and the liquid storage bin.

[0011] A stirring device is arranged at the bottom of the liquid storage bin, and the stirring device comprises a stirring disk and a stirring motor for driving the stirring disk to rotate.

[0012] The top of the liquid storage bin is provided with an overflow port.

[0013] The shell is provided with an air supply port, a pressure transmission port, a balance port and a sight glass port.

[0014] The inner wall of the shell is provided with a heat tracing pipe, and the shell is provided with a high-temperature air inlet connected with the heat tracing pipe.

[0015] Through the above technical scheme, the beneficial effects of the utility model are as follows: the rotary vacuum filter of the utility model feeds into the shell through the feed port, the driving motor drives the drum to rotate, the filtrate enters the array tubes, the first vacuum pump extracts the filtrate from the filtrate outlet, and while the filtrate is extracted, the filter residue forms a filter cake on the filter cloth, and then the filter cake can be backblown to the filter cake outlet for collection by a discharging method in which gas is introduced through a distribution pipe, so that the filter cake is easy to clean, continuous filtration can be achieved, and production efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side structural schematic diagram of a rotary vacuum filter of the utility model.

[0017] Figure 2 It is a front structural schematic diagram of a rotary vacuum filter of the utility model. DETAILED DESCRIPTION

[0018] The structure of the utility model is further described below in conjunction with the accompanying drawings.

[0019] Reference Figure 1 and Figure 2A rotary vacuum filter comprises a frame 10, a shell 20, a drum 30, a drum drive motor 40 and a discharge device 50. The shell is sealed and arranged. The shell is located on the frame. A feed port 29 is provided on the shell. A rotating shaft 31 is provided at both ends of the drum 30. The drum is arranged in the shell through the rotating shaft. The drum is driven by the drum drive motor to rotate in the shell. A filter cloth support 60 is provided on the drum. A filter cloth 61 is provided on the filter cloth support. A tube array 70 connected to the drum is provided in the drum. The tube array outlet is located in the rotating shaft. A distribution head 21 is fixedly provided on the shell 20. The distribution head can also be provided on the frame. One or more distribution pipes 22 connected to the tube array are provided outside the distribution head. The rotating shaft is sealed and rotatably connected with the distribution head. The distribution pipe 22 includes a filtrate outlet 221. A first vacuum pump is provided on the filtrate outlet. A filter cake outlet 23 is provided in the shell 20. In this embodiment, the shell 20 includes a lower shell 201 and an upper shell 202. The lower shell and the upper shell form a sealed cavity. The rotating shafts at both ends of the drum are connected to the frame through bearings 11. The drum driving motor is located at one end of the rotating shaft. The drum driving motor drives the rotating shaft to rotate, and the outlet of the tube array is located inside the other end of the rotating shaft. A wear-resistant disc 311 is fixedly provided at one end of the rotating shaft 31, and the wear-resistant disc is rotatably sealed and connected to the inner side of the distribution head through a sealing ring. The rotary vacuum filter of the utility model feeds into the shell through the feed port, and the driving motor drives the drum to rotate. The filtrate enters the tube array, and the first vacuum pump extracts the filtrate from the filtrate outlet. While the filtrate is extracted, the filter residue forms a filter cake on the filter cloth, and then the filter cake can be back-blown to the filter cake outlet for collection by a discharging method of passing gas through a distribution pipe, so that the filter cake is easy to clean, and continuous filtration can be achieved, with high production efficiency.

[0020] In this embodiment, more than two tube arrays are evenly arranged with the drum as the center, and the tube arrays are connected to the drum through a connecting pipe. More than two tube arrays can be provided as needed to improve the filtration efficiency.

[0021] In this embodiment, a liquid storage bin 24 is provided at the bottom of the shell 20, and the bottom of the drum is located in the liquid storage bin. A washing area 25 and a drying area 26 are provided in sequence in the upper inner part of the shell 20 along the rotation direction of the drum. The washing area and the drying area are located above the liquid storage bin. The filter cake outlet is arranged corresponding to the bottom of the drying area. A filter cake washing port 27 is provided on the shell 20 corresponding to the washing area. The distribution pipe 22 also includes a washing liquid outlet 222 and a pre-drying gas-liquid outlet 223. The washing liquid outlet is provided with a second vacuum pump, and the pre-drying gas-liquid outlet is provided with a third vacuum pump. During filtration, the material to be filtered is introduced into the liquid storage bin so that the bottom of the drum is immersed in the material. The first vacuum pump extracts the filtrate from the filtrate outlet, and the filter residue forms a filter cake on the filter cloth. When the drum rotates, the filter cake rotates to the washing area, and the filter cake washing port in the washing area sprays washing liquid to wash the filter cake. The second vacuum pump washes the washing liquid out from the washing liquid outlet through the array tubes, thereby removing impurities from the filter cake; the washed filter cake continues to rotate, and after being transferred to the drying area for drying, the third vacuum pump sucks the pre-dried gas and liquid out from the pre-dried gas and liquid outlet through the array tubes. In this embodiment, the distribution pipe 22 also includes a back-blowing unloading air inlet 224, and the unloading device 50 is a back-blowing unloading air inlet. After the filter cake is dried, back-blowing gas is introduced from the back-blowing unloading air inlet to blow the filter cake off the filter cloth to the filter cake outlet for collection.

[0022] In this embodiment, the unloading device 50 can also be a scraper 51, one end of the scraper is set corresponding to the bottom of the drum in the drying area, and the other end of the scraper is set corresponding to the filter cake outlet. During the rotation of the drum, when the dried filter cake passes through the scraper, the scraper scrapes the filter cake and drops it at the filter cake outlet for collection. In this embodiment, the scraper and the back-blowing unloading air inlet are unloaded at the same time, the unloading is efficient, the material performance is strong, and the life of the filter cloth can be increased. In specific implementation, the scraper and the back-blowing unloading air inlet can also be selected as needed to unload.

[0023] In this embodiment, the housing 20 is further provided with a filter cloth cleaning port 28, which is located between the drying area and the liquid storage bin. After unloading, the drum moves to the filter cloth cleaning area, and the filter cloth cleaning port sprays cleaning liquid to clean the filter cloth, and the cleaned liquid falls into the lower housing.

[0024] In this embodiment, a stirring device 241 is provided at the bottom of the liquid storage bin 24, and the stirring device 241 includes a stirring disk 2411 and a stirring motor for driving the stirring disk to rotate. The stirring motor drives the stirring disk to stir the material in the liquid storage bin to prevent solid precipitation in the material.

[0025] In this embodiment, an overflow port 242 is provided at the top of the liquid storage bin 24. When the material in the liquid storage bin reaches a predetermined height, the material flows out through the overflow port, thereby preventing the material in the liquid storage bin from entering the washing area.

[0026] In this embodiment, the housing 20 is provided with a gas replenishment port 2021, a pressure transmitter port 2022, a balance port 2023 and a sight glass port 2024. The gas replenishment port is used to replenish gas into the housing to maintain a certain vacuum degree in the housing, the pressure transmitter port is used to test the pressure in the housing, the balance port is used to adjust the pressure in the housing, and the sight glass port 2024 is used to observe the material condition in the housing.

[0027] In this embodiment, the inner wall of the shell 20 is provided with a heat tracing pipe 80, and the shell is provided with a high temperature air inlet 81 connected with the heat tracing pipe. The high temperature air inlet introduces high temperature gas into the heat tracing pipe to keep the inner wall of the shell at a certain temperature to prevent the material in the shell from solidifying.

[0028] The rotary vacuum filter of the utility model is divided into four areas in the shell, namely, the filtration area, the filter cake washing area, the drying area and the filter cloth washing area. The distribution head is divided into four distribution pipes, namely, the filtrate outlet, the washing liquid outlet, the pre-drying gas-liquid outlet and the back-blowing unloading air inlet, which can control the material filtration, filter cake washing, filter cake pre-drying and unloading respectively, and can adjust the control as needed to realize the circulation filtration of the material and reduce energy consumption. The utility model is suitable for the filtration of polyolefins, polyphenylene ether (PPO), polyphenylene ether (PPE), polyphenylene sulfide (PPS), ABS, polyarylether (PAE), chlorosilane, bisphenol A, PTA, etc. The overall structural design is compact and reasonable, multifunctional, high in production efficiency, and energy-saving and emission-reducing.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0033] Although the specific implementation of the utility model is described in detail in conjunction with the drawings, it should not be understood as limiting the protection scope of the utility model. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still belong to the protection scope of the utility model.

Claims

1. A rotary vacuum filter, characterized in that: The filter comprises a frame, a shell, a drum, a drum drive motor and a discharge device. The shell is sealed and located on the frame. A feed port is provided on the shell. Rotating shafts are provided at both ends of the drum. The drum is arranged in the shell through the rotating shaft. The drum drive motor drives the drum to rotate in the shell. A filter cloth bracket is provided on the drum. The filter cloth bracket is provided with filter cloth. A tube array connected to the drum is provided in the drum. The tube array outlet is located in the rotating shaft. A distribution head is fixed on the shell or the frame. One or more distribution pipes connected to the tube array are provided on the outside of the distribution head. The rotating shaft is sealed and rotatably connected to the distribution head. The distribution pipe comprises a filtrate outlet. A first vacuum pump is provided on the filtrate outlet. A filter cake outlet is provided in the shell.

2. A rotary vacuum filter according to claim 1, characterized in that: Two or more tube arrays are evenly arranged with the drum as the center, and the tube arrays are connected with the drum through a connecting pipe.

3. A rotary vacuum filter according to claim 1, characterized in that: A liquid storage bin is provided at the bottom of the shell, the bottom of the drum is located in the liquid storage bin, a washing area and a drying area are provided in sequence on the upper inner part of the shell along the rotation direction of the drum, the washing area and the drying area are located above the liquid storage bin, the filter cake outlet is arranged corresponding to the bottom of the drying area, a filter cake washing port is provided on the shell corresponding to the washing area, the distribution pipe also includes a washing liquid outlet and a pre-drying gas-liquid outlet, the washing liquid outlet is provided with a second vacuum pump, and the pre-drying gas-liquid outlet is provided with a third vacuum pump.

4. A rotary vacuum filter according to claim 3, characterized in that: The distribution pipe also includes a back-blowing unloading air inlet, and the unloading device is a back-blowing unloading air inlet.

5. A rotary vacuum filter as claimed in claim 3, characterized in that: The discharging device is a scraper, one end of the scraper is arranged corresponding to the bottom of the drum in the drying area, and the other end of the scraper is arranged corresponding to the filter cake outlet.

6. A rotary vacuum filter as claimed in claim 3, characterized in that: The shell body is also provided with a filter cloth cleaning port, which is located between the drying area and the liquid storage bin.

7. A rotary vacuum filter as claimed in claim 3, characterized in that: A stirring device is arranged at the bottom of the liquid storage bin, and the stirring device comprises a stirring disk and a stirring motor for driving the stirring disk to rotate.

8. A rotary vacuum filter as claimed in claim 3, characterized in that: The top of the liquid storage bin is provided with an overflow port.

9. A rotary vacuum filter according to claim 1, characterized in that: The shell is provided with an air supply port, a pressure transmission port, a balance port and a sight glass port.

10. A rotary vacuum filter according to claim 1, characterized in that: The inner wall of the shell is provided with a heat tracing pipe, and the shell is provided with a high-temperature air inlet communicated with the heat tracing pipe.

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