A vertical filter press and filter pressing device therein

Abstract

The invention discloses a vertical filter press that does not require stirring of feed liquid and a filter press device therein, the filter press device comprises: a housing, a filter plate and a filter cartridge are arranged in the housing, a pressing plate is arranged in the filter cartridge, at least two filter cartridge opening and closing oil cylinders are arranged on the housing, the piston rod of the filter cartridge opening and closing oil cylinder is connected to the filter cartridge, a filter press oil cylinder is also arranged on the housing, both ends of the piston rod in the filter press oil cylinder are extended, the lower end of the piston rod in the filter press oil cylinder is connected to the pressing plate, a feed and washing liquid channel that passes through up and down is axially opened in the pressing plate driving rod, a feed port that communicates with the feed and washing liquid channel is horizontally opened at the upper end of the piston rod in the filter press oil cylinder, an input through hole connected to the feed and washing liquid channel is opened on the pressing plate, an input control valve is arranged in the input through hole, a filter hole is opened on the filter plate, and a filter screen is arranged on the filter plate. The vertical filter press equipped with the filter press device can be widely used in fine chemicals, pharmaceuticals, environmental protection, food and other industries.

Description

Technical Field

[0001] The invention relates to a filtering device, in particular to a vertical filter press and a filter pressing device therein. Background Art

[0002] At present, a vertical filter press disclosed in document number CN108339302A has a relatively complex structure, and generally includes: an upper head, a lower head, a press cylinder, a press plate device, peripheral and top and bottom sintered meshes, a horizontal reducer, an explosion-proof motor, a press plate, a press cylinder, an axle lifting cylinder, a hydraulic pump station, a gear crusher and an S-shaped scraper. In actual use, the feed liquid needs to be stirred, which, on the one hand, increases the complexity of the entire vertical filter press and generates noise during stirring. On the other hand, it increases the time required for filtration, increases the filtration cycle, and reduces the filtration efficiency. In addition, it is also necessary to open the cover from time to time to clean or replace the filter screen in the filter press, which further reduces the production capacity of the vertical filter press. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a filter press device in a vertical filter press which does not require stirring of feed liquid.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a filter pressing device in a vertical filter press, comprising: a housing, a filter plate is arranged in the housing, a filter cartridge is movably arranged above the filter plate in the housing, a pressure plate is movably arranged in the filter cartridge, at least two filter cartridge opening and closing oil cylinders are arranged circumferentially on the housing, the piston rod of the filter cartridge opening and closing oil cylinder is connected to the filter cartridge as a filter cartridge driving rod, a filter chamber is formed when the filter cartridge is closed, and material can be discharged when it is opened; a filter pressing oil cylinder is also arranged on the housing, both ends of the piston rod in the filter pressing oil cylinder are extended, and the piston rod in the filter pressing oil cylinder is As a pressure plate driving rod, its lower end is connected to the pressure plate, and the pressure plate driving rod is a hollow structure, that is: a feed and washing liquid channel that passes through the upper and lower parts is axially opened in the pressure plate driving rod, and at least one feed port that communicates with the feed and washing liquid channel is horizontally opened at the upper end of the pressure plate driving rod; an input through hole connected to the feed and washing liquid channel is opened on the pressure plate, and an input control valve is arranged in the input through hole; a plurality of filter holes that pass through the filter plate are opened on the filter plate, and a filter screen is arranged on the filter plate; the shell is also provided with a filtrate cavity below the filter plate, and a liquid outlet is opened on the filtrate cavity.

[0005] As a preferred solution, in the filter pressing device in the vertical filter press, the shell is provided with an ultrasonic device on the outside of the filtrate chamber, and the vibrator of the ultrasonic device is linked to the filter screen through the amplitude rod and the filter plate.

[0006] As a preferred embodiment, in the filter pressing device in the vertical filter press, the specific structure of the input control valve includes: a feed valve plate, and a valve stem movably arranged in the feed and washing liquid channels, a feed valve cylinder is arranged on the top of the pressure plate driving rod, the piston rod of the feed valve cylinder is connected to the upper end of the valve stem, and the lower end of the valve stem is connected to the feed valve plate.

[0007] As a preferred embodiment, in the filter pressing device of the vertical filter press, the feed and washing liquid channels are provided with a guide frame near the pressure plate, and the guide frame is provided with a guide sleeve matching the valve stem, and the valve stem is movably inserted in the guide sleeve.

[0008] As a preferred solution, in the filter pressing device of the vertical filter press, the lower port of the input through hole is in the shape of a trumpet that is small inside and large outside, and correspondingly, the feed valve plate is in the shape of a truncated cone that is small on the top and large on the bottom.

[0009] As a preferred embodiment, in the filter pressing device in the vertical filter press, a feed washing seat is provided on the top of the pressure plate driving rod, and the feed valve cylinder is provided on the feed washing seat. There are two feed ports, namely a slurry feed port and a washing feed port, both of which are opened on the feed washing seat.

[0010] As a preferred embodiment, in the filter pressing device in the vertical filter press, the liquid outlet is connected to a liquid outlet pipeline, a liquid outlet control valve is arranged in the liquid outlet pipeline, a filter cleaning port is also opened on the filtrate chamber, a filter cleaning port is connected to a filter cleaning pipeline, a filter cleaning control valve is arranged in the filter cleaning pipeline.

[0011] A further technical problem to be solved by the present invention is to provide a vertical filter press capable of discharging and crushing materials simultaneously.

[0012] In order to solve the above-mentioned further technical problems, the technical solution adopted by the present invention is: a vertical filter press, including the filter press device described in the present invention, the shell is provided with a scraper device matched with the filter plate and a scraper driving device for driving the scraper device to move linearly on one side, and a crushing and discharging mechanism matched with the filter plate and a discharging driving device for driving the crushing and discharging mechanism to move on the other opposite side.

[0013] As a preferred embodiment, in the vertical filter press, the specific structure of the scraper device includes: a scraper seat and a scraper arranged on the scraper seat; the specific structure of the scraper driving device includes: a scraper cylinder, and the scraper seat is connected to the piston rod of the scraper cylinder; the specific structure of the crushing and discharging mechanism includes: a discharging barrel, and a discharging shaft arranged in the discharging barrel, and a pushing spiral is arranged on the discharging shaft; the crushing and discharging driving device includes: a discharging motor, and the output shaft of the discharging motor is connected to the discharging shaft.

[0014] As a preferred solution, in the vertical filter press, a gas purge device is also provided on the scraper seat.

[0015] The beneficial effects of the present invention are as follows: the filter press device of the present invention has a more compact and simple structure. When working, after the slurry to be filtered enters the filter chamber, the pressure plate moves down to filter the material to form a filter cake. Then, a washing liquid is added to wash and purify the filter cake, and the filter cartridge is withdrawn. Then, the filter cake is pushed to the crushing and discharging mechanism by a scraper for crushing and conveying to the discharge port. The whole process does not generate noise, so that the physical and mental health of the operator is well protected. In addition, since the filter screen is connected to the ultrasonic device through the amplitude rod, the mesh of the filter screen will not be blocked during use, so there is no need to open the cover to clean the filter screen, thereby improving the filtration efficiency and reducing the use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the vertical filter press of the present invention.

[0017] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A.

[0018] Figures 3 to 11 It is a schematic diagram of the working process of the vertical filter press of the present invention.

[0019] Figures 1 to 11The reference numerals in the drawings are: 1, feed valve cylinder, 2, feed washing seat, 21, slurry feed port, 211, slurry feed pipeline, 2110, slurry feed manual control valve, 2111, slurry feed automatic control valve, 22, washing feed port, 221, washing feed pipeline, 2210, washing feed manual control valve, 2211, washing feed automatic control valve, 3, valve stem, 4, filter press cylinder, 41, pressure plate drive rod, 411, feed and washing liquid channel, 5, filter cartridge opening and closing cylinder, 6, feed valve plate, 60, guide frame, 61, valve stem, 62. Guide sleeve, 7. Press plate, 8. Filter cartridge, 9. Filter plate, 91. Filter hole, 92. Filter screen, 10. Scraper, 101. Scraper cylinder, 102. Scraper seat, 105. Gas purge mechanism, 11. Filtrate chamber, 12. Filter screen cleaning port, 121. Filter screen cleaning pipeline, 1210. Filter screen cleaning manual control valve, 1211. Filter screen cleaning automatic control valve, 13. Vibrator, 14. Liquid outlet, 141. Liquid outlet pipeline, 1411. Liquid outlet automatic control valve, 15. Discharge barrel, 16. Discharge port, 17. Discharge motor, 18. Housing. DETAILED DESCRIPTION

[0020] The following describes in detail a vertical filter press and a detailed implementation scheme of the filter press device therein according to the present invention in conjunction with the embodiments and the accompanying drawings.

[0021] like Figure 1As shown, a filter press device in a vertical filter according to the present invention comprises: a housing 18, a filter plate 9 is arranged in the housing 18, a filter cartridge 8 is movably arranged above the filter plate 9 in the housing 18, a pressure plate 7 is movably arranged in the filter cartridge 8, three filter cartridge opening and closing oil cylinders 5 are evenly arranged along the circumferential direction on the housing 18, the piston rods of the filter cartridge opening and closing oil cylinders 5 are connected to the filter cartridge 8 as filter cartridge driving rods, a filter press oil cylinder 4 is also arranged on the housing 18, both ends of the piston rod of the filter press oil cylinder 4 extend outward, the piston rod of the filter press oil cylinder 4 is used as a pressure plate driving rod 41, and its lower end is connected to the pressure plate 7, and the pressure plate driving rod 41 is a hollow structure The structure is as follows: a feed and washing liquid channel 411 which passes through the pressing plate driving rod 41 is axially provided in the pressing plate driving rod 41, a feed washing seat 2 is provided at the upper end of the pressing plate driving rod 41, a slurry feed port 21 and a washing feed port 22 are provided on both sides of the feeding washing seat 2, a slurry feed pipeline 211 is connected to the slurry feed port 21, a slurry feed automatic control valve 2111 is provided on the slurry feed pipeline 211, a washing feed automatic control valve 2111 is provided on the slurry feed port 22, a washing feed pipeline 221 is connected to the washing feed port 22, and a washing feed automatic control valve 2211 is provided on the washing feed pipeline 221; an input through hole connected to the feed and washing liquid channel 411 is provided on the pressing plate 7, and the input through hole is connected to the washing liquid channel 411. The lower port of the input through hole is in the shape of a trumpet with a small inside and a large outside. An input control valve is arranged in the input through hole. The specific structure of the input control valve includes: a feed valve plate 6 and a valve stem 61 movably arranged in the feed and washing liquid channel 411. The feed valve plate 6 corresponds to the input through hole and is in the shape of a truncated cone with a small top and a large bottom. The feed and washing liquid channel 411 is provided with a guide frame 60 near the pressure plate 7. The guide frame 60 is provided with a guide sleeve 62 matched with the valve stem 61. The valve stem 61 is movably arranged in the guide sleeve 62; the top of the feed washing seat 2 is provided with a feed valve cylinder 1, and the piston rod of the feed valve cylinder 1 is connected to the feed washing seat 2. The upper end of the valve stem 61 is connected, and the lower end of the valve stem 61 is connected to the feed valve plate 6; the filter plate 9 is provided with a plurality of filter holes 91 penetrating the filter plate 9, and the filter plate 9 is provided with a filter screen 92; the housing 18 is also provided with a filtrate chamber 11 below the filter plate 9, the filtrate chamber 11 is provided with a liquid outlet 14, the liquid outlet 14 is connected with a liquid outlet pipeline 141, and the liquid outlet pipeline 141 is provided with a liquid outlet automatic control valve 1411, the filtrate chamber 11 is also provided with a filter screen cleaning port 12, the filter screen cleaning port 12 is connected with a filter screen cleaning pipeline 121, and the filter screen cleaning pipeline 121 is provided with a filter screen cleaning automatic control valve 1211. The housing 18 is provided with an ultrasonic device on the outside of the filtrate chamber 11, and the vibrator 13 of the ultrasonic device is linked with the filter screen 92 through the amplitude rod and the filter plate 9.

[0022] The present invention also provides a vertical filter press equipped with the above-mentioned filter press device, wherein the housing 18 is provided with a scraper device matched with the filter plate 9 and a scraper driving device for linear movement of the scraper device on one side thereof, and a crushing and discharging mechanism matched with the filter plate 9 and a crushing and discharging driving device for driving the crushing and discharging mechanism to move on the other side thereof, wherein the scraper device comprises: a scraper seat 102, a scraper 10 is provided at the front end of the scraper seat 102; the specific structure of the scraper driving device comprises: a scraper oil cylinder 101, a piston rod of the scraper oil cylinder 101 and the scraper The scraper seat 102 is connected; the scraper seat 102 is also provided with a gas purge mechanism 105 (the gas purge mechanism 105 belongs to the conventional technology in this field and will not be described in detail here); the specific structure of the crushing and discharging mechanism includes a discharging barrel 15, and a discharging shaft arranged in the discharging barrel 15, and a pushing screw is arranged on the discharging shaft (the discharging shaft and the pushing screw belong to the conventional technology in this field and will not be described in detail here), and the crushing and discharging drive device includes: a discharging motor 17, and the output shaft of the discharging motor 17 is connected to the discharging shaft (it belongs to the conventional technology in this field and will not be described in detail here).

[0023] In actual application, the slurry feed pipeline 211 is provided with a slurry feed manual control valve 2110 upstream of the slurry feed automatic control valve 2111 along the flow direction; the washing feed pipeline 221 is provided with a washing feed manual control valve 2210 upstream of the washing feed automatic control valve 2211 along the flow direction; the filter cleaning pipeline 121 is provided with a filter cleaning manual control valve 1210 upstream of the filter cleaning automatic control valve 1211 along the flow direction.

[0024] The working principle of the present invention is as follows: the filter cartridge opening and closing cylinder 5 is pushed out, and the lower end of the filter cartridge 8 is sealed with the filter plate 9 to form a filter chamber. The feed valve cylinder 1 is opened, and the slurry enters the filter chamber. The filter press cylinder 4 is actuated to filter the slurry to form a filter cake. The filter press cylinder 4 is withdrawn, and at the same time, the washing liquid enters the filter chamber. The filter press cylinder 4 is pressed downward again to wash the filter cake and form a final filter cake. During the filter press, the ultrasonic wave is turned on to generate high-frequency vibration to the filter screen 92, so that the filter screen 92 is not blocked and is regenerated while filtering. The filter press cylinder 4 is withdrawn, the filter cartridge opening and closing cylinder 5 is opened, and the scraper cylinder 101 is actuated to scrape the filter cake off until the filter cake crushing conveyor is unloaded from the discharge port 16. It is a fully enclosed form, static pressure design, no vibration, low noise, and can be widely used in fine chemicals, pharmaceuticals, environmental protection, food and other industries. The specific process is:

[0025] First, the scraper cylinder 101 is retracted to the correct position, the filter cartridge opening and closing cylinder 5 is advanced to the correct position, and the filter press cylinder 4 is moved to the feed position. Figure 3 As shown;

[0026] Feeding process: the feed valve cylinder 1 is pushed out and the feed valve plate 6 is opened. At the same time, the slurry feed automatic control valve 2111 is opened, the filter press cylinder 4 is withdrawn, and the slurry to be filtered fills the filter cartridge 8; the feed valve cylinder 1 is withdrawn and the feed valve plate 6 is closed. At the same time, the slurry feed automatic control valve 2111 is closed. Figure 4 As shown;

[0027] Primary filtration process: The filter press cylinder 4 is actuated to filter, and the filtration is realized through the filter plate 9. The solid phase is stored on the surface of the filter plate 9, and the liquid phase is filtered out from the filter plate 9 into the filtrate chamber 11 - see Figure 5 As shown, it is discharged from the liquid outlet 14; during the filtration process, the ultrasonic wave is activated and the filter plate 9 generates high-frequency vibration; when the pressure reaches the set initial filtration pressure, the filter pressure cylinder 4 retreats to its position, and at the same time, the feed valve cylinder 1 pushes out and opens the feed valve plate 6, and at the same time, the washing feed automatic control valve 2211 opens, and the washing liquid enters the filter chamber. The feed valve cylinder 1 retreats and closes the feed valve plate 6, and at the same time, the washing feed automatic control valve 2211 closes - see Figure 6 As shown;

[0028] Filter pressing process: The filter pressing cylinder 4 is activated to filter, the ultrasonic wave is started, and the filter plate 9 generates high-frequency vibration. When the pressure reaches the set maximum pressure, it delays for a period of time (depending on the filtering characteristics of the material), the filter pressing is completed, and the filter plate returns to the unloading position of the pressure plate - see Figure 7 As shown;

[0029] Unloading process: filter cartridge opening and closing cylinder 5 returns to its original position - see Figure 8 As shown, the scraper oil cylinder 101 is in motion; the filter cake is pushed into the crushing and discharging mechanism, where it is crushed and transported to the discharging port 16 through the spiral in the discharging cylinder 15; the scraper 10 is retracted into place - see Fig. 9 As shown;

[0030] Reset process: The filter cartridge opening and closing cylinder 5 moves into place, and the filter pressing cylinder 4 moves to the pressing plate feeding position - see Fig.10 As shown;

[0031] Filter screen regeneration: During the feeding process, the initial filtration process, and the filter pressing process, the ultrasonic generator is started, and the ultrasonic device excites the filter plate 9. Under high-frequency vibration, the filtration process is accelerated and the filter screen 92 is kept unobstructed. After the filtration is completed, the liquid outlet automatic control valve 1411 is closed, the filter screen cleaning automatic control valve 1211 is opened, the ultrasonic generator is started, and the ultrasonic device excites the filter plate 9. Under high-frequency vibration, the filter screen 92 is cleaned and regenerated - see Fig.11 shown.

[0032] In summary, the above is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes and modifications made to the shape, structure, characteristics and spirit described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A filter press device in a vertical filter press, comprising: The housing comprises a filter plate, a filter cartridge movably arranged above the filter plate in the housing, and a pressure plate movably arranged in the filter cartridge, wherein the housing is characterized in that at least two filter cartridge opening and closing oil cylinders are circumferentially arranged on the housing, and the piston rods of the filter cartridge opening and closing oil cylinders are connected to the filter cartridge as filter cartridge driving rods, and a filter chamber is formed when the filter cartridge is closed, and material can be discharged when it is opened; a filter pressing oil cylinder is also arranged on the housing, and both ends of the piston rod in the filter pressing oil cylinder are extended, and the piston rod in the filter pressing oil cylinder is used as a pressure plate driving rod, and its lower end is connected to the pressure plate, The pressure plate driving rod is a hollow structure, that is: a feed and washing liquid channel that runs through the upper and lower parts is axially opened in the pressure plate driving rod, at least one feed port that communicates with the feed and washing liquid channel is horizontally opened at the upper end of the pressure plate driving rod, an input through hole connected to the feed and washing liquid channel is opened on the pressure plate, and an input control valve is arranged in the input through hole; a plurality of filter holes that pass through the filter plate are opened on the filter plate, and a filter screen is arranged on the filter plate; the shell is also provided with a filtrate cavity below the filter plate, and a liquid outlet is opened on the filtrate cavity.

2. The filter press device in the vertical filter press according to claim 1, characterized in that: The shell is provided with an ultrasonic device on the outside of the filtrate cavity, and the vibrator of the ultrasonic device is linked with the filter screen through the amplitude rod and the filter plate.

3. The filter press device in the vertical filter press according to claim 1, characterized in that: The specific structure of the input control valve includes: a feed valve plate, and a valve stem movably arranged in the feed and washing liquid channels, a feed valve cylinder is arranged on the top of the pressure plate driving rod, the piston rod of the feed valve cylinder is connected to the upper end of the valve stem, and the lower end of the valve stem is connected to the feed valve plate.

4. The filter press device in the vertical filter press according to claim 3, characterized in that: The feed and washing liquid channel is provided with a guide frame near the pressure plate, and a guide sleeve matched with the valve stem is provided on the guide frame, and the valve stem is movably inserted in the guide sleeve.

5. The filter press device in the vertical filter press according to claim 4, characterized in that: The lower port of the input through hole is in the shape of a trumpet that is small inside and large outside. Correspondingly, the feed valve plate is in the shape of a truncated cone that is small at the top and large at the bottom.

6. The filter press device in the vertical filter press according to claim 5, characterized in that: A feed washing seat is arranged on the top of the pressing plate driving rod, and a feed valve oil cylinder is arranged on the feed washing seat. There are two feed ports, namely a slurry feed port and a washing feed port, and both are opened on the feed washing seat.

7. The filter press device in the vertical filter press according to any one of claims 1 to 6, characterized in that: The liquid outlet is connected to a liquid outlet pipeline, in which a liquid outlet control valve is arranged; the filtrate cavity is also provided with a filter cleaning port, in which a filter cleaning pipeline is connected, in which a filter cleaning control valve is arranged.

8. A vertical filter press, characterized in that: It comprises the filter press device as claimed in claim 1, wherein the shell is provided with a scraper device matched with the filter plate and a scraper driving device for linear movement of the scraper device on one side, and a crushing and discharging mechanism matched with the filter plate and a crushing and discharging driving device for driving the crushing and discharging mechanism to move on the other opposite side.

9. A vertical filter press according to claim 8, characterized in that: The specific structure of the scraper device includes: a scraper seat and a scraper arranged on the scraper seat; the specific structure of the scraper driving device includes: a scraper cylinder, and the scraper seat is connected to the piston rod of the scraper cylinder; the specific structure of the crushing and discharging mechanism includes: a discharging barrel, and a discharging shaft arranged in the discharging barrel, and a pushing spiral is arranged on the discharging shaft; the crushing and discharging driving device includes: a discharging motor, and the output shaft of the discharging motor is connected to the discharging shaft.

10. A vertical filter press according to claim 9, characterized in that: The scraper seat is also provided with a gas purge device.

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