Discharging device of rotary pressure filter

Abstract

The invention relates to a discharging device of a rotary pressure filter, which solves the problem that the existing rotary pressure filter cannot effectively discharge. Comprising a scraping device, the scraping device comprises a scraper, the scraper is movably installed in a discharging box of the pressure filter, the scraping device further comprises a scraper reset device, the discharging device further comprises a gas back flushing system, when the scraping device is used, the scraper is located at the initial position, when a rotary drum of the pressure filter rotates, the scraper scrapes a filter cake formed on filter cloth, and the filter cloth rotates along with the rotary drum. After the scraper touches the transverse ribs of the rotary drum, the scraper reset device drives the scraper to return to the initial position again, the scraper completes one-time discharging, then residual light and thin filter cakes on the filter cloth are discharged again through the gas blowback system, and continuous discharging is achieved repeatedly. The scraper scrapes heavy filter cakes and is matched with the gas blowback system to blow away residual light and thin filter cakes, so that the filter cakes on the filter cloth can be thoroughly unloaded, and particularly, the filter cakes with relatively high material viscosity can be thoroughly unloaded.

Description

Technical Field

[0001] The present invention relates to the field of petrochemical machinery and equipment engineering, and particularly relates to a discharging device for a rotary pressure filter. Background Art

[0002] Rotary pressure filters are widely used in many industries, and the properties of the materials to be filtered are also different. The traditional rotary pressure filter adopts a reverse blowing and discharging structure. For some materials with high viscosity and thick filter cakes, the discharging effect is not very ideal. Since the filter cake is in the drum chamber of the rotary pressure filter and rotates with the drum, the traditional scraper cannot meet the requirements of effective discharging. Summary of the Invention

[0003] The purpose of the present invention is to solve the problem that the existing rotary pressure filter cannot effectively discharge materials.

[0004] The technical solution adopted to solve the technical problem proposed by the present invention is as follows: The discharging device of the feeding rotary pressure filter of the present invention includes a scraping device. The scraping device includes a scraper corresponding to the drum of the pressure filter. A filter cloth is provided on the drum of the pressure filter. The drum of the pressure filter is rotatably arranged on a drum rotating shaft. The scraper is installed in the discharging box of the pressure filter. The scraper is movably installed in the discharging box of the pressure filter. The scraping device further includes a scraper reset device for driving the scraper to reset. The scraper reset device is arranged in the discharging box. The discharging device further includes a gas reverse blowing system. The gas reverse blowing system includes a gas storage tank, a drum reverse blowing air pipe, and a reverse blowing air distribution block. The air outlet of the gas storage tank is connected to the reverse blowing air distribution block. The drum reverse blowing air pipe is fixed inside the drum. The air outlet of the drum reverse blowing air pipe is arranged corresponding to the inner side of the filter cloth on the drum of the pressure filter. A drum sleeve is provided on the drum. A drum sleeve installation hole for fixing the air inlet of the drum reverse blowing air pipe is provided on the drum sleeve. The reverse blowing air distribution block is fixedly arranged on one side of the discharging area of the pressure filter. When the drum rotates into the discharging area of the pressure filter, the air outlet of the reverse blowing air distribution block is communicated with the air inlet of the corresponding drum reverse blowing air pipe.

[0005] The technical solutions for further limiting the present invention include: The scraping device further includes a tool rest and a scraper fixing part. The scraper fixing part is installed in the discharging box of the pressure filter. The middle part of the tool rest is rotatably connected to the discharging box. The scraper reset device is a spring. The two ends of the spring are respectively fixedly connected to the tool rest and the scraper fixing part. When the scraper touches the cross beam of the filter drum, it drives the tail of the tool rest to rotate, causing the spring to stretch. The spring pulls the tail of the scraper to rotate the tool rest, driving the scraper to reset and completing one discharging operation.

[0006] A scraping blade adjusting assembly is provided at the tail end of the tool rest. The scraping blade adjusting assembly includes a suspension rod and an adjusting member for adjusting the height of the suspension rod. The tail of the tool rest is lapped on the suspension rod.

[0007] The adjusting member is an adjusting screw. Through holes matching the adjusting screws are provided on the suspension rod. An adjusting screw is provided at each end of the suspension rod. Threaded holes matching the adjusting screws are provided in the blanking box of the filter press.

[0008] The tool rest has an L-shaped structure. The corner of the L-shaped tool rest is rotatably connected to the blanking box. A raised conical block is provided at the corner of the L-shaped tool rest. The conical block is rotatably connected to the blanking box.

[0009] The scraping blade fixing member includes a support rod and mounting blocks fixedly provided at both ends of the support rod. Mounting holes are provided on the mounting blocks. A connecting rod perpendicular and fixed to the support rod is provided in the middle of the support rod. The connecting rod is fixedly connected to a spring.

[0010] The top of the scraping blade is provided with an upwardly inclined slope.

[0011] Multiple rotary drum backwashing air pipes are arranged in a circumferential and uniform manner around the rotary drum rotating shaft.

[0012] The gas backwashing system further includes a regulating valve for regulating the backwashing air pressure.

[0013] Through the above technical solutions, the beneficial effects of the present invention are as follows: The scraping blade of the discharging device of the rotary pressure filter press of the present invention is arranged corresponding to the rotary drum of the pressure filter press. The scraping blade is movably installed in the blanking box, and the scraping blade reset device drives the scraping blade to reset. When in use, the scraping blade is in the initial position. When the rotary drum of the pressure filter press rotates, the scraping blade scrapes off the filter cake formed on the filter cloth. As the rotary drum rotates, after the scraping blade touches the transverse ribs of the rotary drum, the scraping blade reset device drives the scraping blade to return to the initial position again. The scraping blade completes one discharging operation. Then, the remaining thin filter cake on the filter cloth is discharged again through the gas backwashing system. Repeating this way realizes continuous discharging. The scraping blade scraping off the thick filter cake cooperates with the gas backwashing system to blow off the remaining thin filter cake, so that the filter cake on the filter cloth can be completely discharged, especially for the filter cake with relatively high material viscosity. Description of the Drawings

[0014] Figure 1 It is a schematic assembly structure diagram of a discharging device of a rotary pressure filter press of the present invention.

[0015] Figure 2 It is a schematic assembly structure diagram of a discharging device of a rotary pressure filter press of the present invention.

[0016] Figure 3 It is a schematic structure diagram of a scraping device of a discharging device of a rotary pressure filter press of the present invention.

[0017] Figure 4 This is a schematic structural diagram of the scraping device of a discharging device of a rotary pressure filter according to the present invention.

[0018] Figure 5 This is a schematic structural diagram of the gas back-blowing system of a discharging device of a rotary pressure filter according to the present invention. Specific embodiments

[0019] The structure of the present invention will be further described below with reference to the accompanying drawings.

[0020] Referring to Figures 1 to 5 , a discharging device of a rotary pressure filter includes a scraping device 10. The scraping device 10 includes a scraper 11 corresponding to a rotary drum 20 of a pressure filter. A filter cloth 21 is provided on the rotary drum 20 of the pressure filter. The rotary drum 20 of the pressure filter is rotatably arranged on a drum rotating shaft. The scraper is installed in a blanking box 22 of the pressure filter. The scraper is movably installed in the blanking box of the pressure filter. The scraping device 10 further includes a scraper reset device 12 for driving the scraper to reset. The scraper reset device is arranged in the blanking box. In this embodiment, the scraping device 10 further includes a tool rest 13 and a scraper fixing member 14. The scraper fixing member 14 is installed in the blanking box of the pressure filter. The middle part of the tool rest 13 is rotatably connected to the blanking box. The tool rest 13 has an L-shaped structure. The corner of the L-shaped tool rest is rotatably connected to the blanking box. A convex conical block 131 is provided at the corner of the L-shaped tool rest. The conical block is rotatably connected to the blanking box. Thus, the tool rest can rotate around the axis of the conical block. The scraper reset device 12 is a spring. The two ends of the spring are respectively fixedly connected to the tool rest and the scraper fixing member. When the scraper touches a rotary drum cross beam 201 of the filter, it drives the tail of the tool rest to rotate, causing the spring to stretch. The spring pulls the tail of the scraper, causing the tool rest to rotate and driving the scraper to reset to complete one discharging operation. In this embodiment, an upwardly inclined slope 111 is provided at the top of the scraper 11. The slope causes the scraper to form a certain angle when contacting the rotary drum cross beam, so as to avoid excessive wear on the upper cutting surface of the scraper.

[0021] In this embodiment, a scraper adjustment assembly 15 is provided at the tail end of the tool rest 13. The scraper adjustment assembly 15 includes a suspension rod 151 and an adjustment member 152 for adjusting the height of the suspension rod. The tail of the tool rest is lapped on the suspension rod. In this embodiment, the adjustment member 152 is an adjustment screw. Through holes matching the adjustment screws are provided on the suspension rod. One adjustment screw is provided at each end of the suspension rod. Threaded holes matching the adjustment screws are provided in the blanking box of the filter. During adjustment, the height of the suspension rod is adjusted by the adjustment screws. When the suspension rod moves up and down, it drives the tail of the tool rest to swing, thereby adjusting the distance between the scraper and the rotary drum. Thus, during use, the distance between the scraper and the rotary drum can be adjusted according to the thickness of the material on the rotary drum to meet the scraping of different materials.

[0022] In this embodiment, the scraper fixing member 14 includes a support rod 141 and mounting blocks 142 fixedly provided at both ends of the support rod. Mounting holes are provided on the mounting blocks. A connecting rod 143 perpendicular to and fixedly connected to the support rod is provided in the middle of the support rod, and the connecting rod is fixedly connected to a spring. The support rod can be fixedly installed on the blanking box through the mounting holes.

[0023] The discharging device further includes a gas back-blowing system 30. The gas back-blowing system 30 includes a gas storage tank 31, a rotary drum back-blowing air pipe 32, and a back-blowing air distribution block 33. The gas storage tank itself is provided with an air inlet, an air outlet, and other necessary pipe orifices. The air outlet of the gas storage tank 31 is connected to the back-blowing air distribution block 33, that is, the gas in the gas storage tank is conveyed out through the back-blowing air distribution block. The rotary drum back-blowing air pipe 32 is fixed inside the rotary drum 20. During operation, the rotary drum back-blowing air pipe rotates together with the rotary drum. The air outlet 321 of the rotary drum back-blowing air pipe is arranged corresponding to the inner side of the filter cloth 21 on the rotary drum of the pressure filter. A rotary drum sleeve 202 is provided on the rotary drum 20. A rotary drum sleeve mounting hole for fixing the air inlet 322 of the rotary drum back-blowing air pipe is provided on the rotary drum sleeve 202. The back-blowing air distribution block is fixedly arranged on one side of the blanking area of the pressure filter. When the rotary drum rotates into the blanking area of the pressure filter, the air outlet 331 of the back-blowing air distribution block is communicated with the air inlet of the corresponding rotary drum back-blowing air pipe. That is, when the rotary drum back-blowing air pipe rotates into the blanking area, the rotary drum back-blowing air pipe can be communicated with the air outlet of the back-blowing air distribution block to ventilate. At this time, the rotary drum back-blowing air pipe ventilates to blow the residual filter cake on the filter cloth to the filter cake recovery place. In this embodiment, multiple rotary drum back-blowing air pipes are arranged in a circumferential and uniform manner centered on the rotary drum shaft. The number of rotary drum back-blowing air pipes can be set as needed to improve the back-blowing and discharging efficiency. In this embodiment, the gas back-blowing system 30 further includes a regulating valve 34 for regulating the back-blowing air pressure. The regulating valve can be in the form of pneumatic or electric, and is used to control and regulate the back-blowing air pressure.

[0024] When the discharging device of the rotary pressure filter of the present invention is working, the scraper is in the initial position. When the rotary drum of the pressure filter rotates, the scraper scrapes off the filter cake formed on the filter cloth. As the rotary drum rotates, after the scraper touches the transverse rib of the rotary drum, the tail of the tool holder swings upward, the spring stretches, and after passing through the transverse rib of the rotary drum, it returns to the initial position under the action of the spring, completing one discharging. Then, the thin filter cake that is not scraped off by the scraper on the filter cloth is discharged again through the gas back-blowing system. Repeating this way realizes continuous discharging. The thick filter cake scraped off by the scraper cooperates with the gas back-blowing system to blow off the thin filter cake, so as to be able to completely discharge the filter cake on the filter cloth, especially for the filter cake with a relatively high material viscosity.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 should not be construed as a limitation of the present invention.

[0026] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0029] Although the specific embodiments of the present invention have been described in detail in conjunction with the accompanying drawings, it should not be construed as a limitation of the protection scope of the present invention. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative efforts still fall within the protection scope of the present invention.

Claims

1. A rotary pressure filter unloading device, comprising a scraping device, wherein the scraping device comprises a scraper arranged corresponding to the pressure filter drum, the pressure filter drum is provided with a filter cloth, the pressure filter drum is rotatably arranged on the drum shaft, and the scraper is installed in the unloading box of the pressure filter, characterized in that: The scraper is movably installed in the unloading box of the pressure filter, the scraper device also includes a scraper resetting device for driving the scraper to reset, the scraper resetting device is arranged in the unloading box, the unloading device also includes a gas backblowing system, the gas backblowing system includes a gas storage tank, a rotary drum backblowing air pipe and a backblowing air distribution block, the air outlet of the gas storage tank is connected to the backblowing air distribution block, the rotary drum backblowing air pipe is fixed in the rotary drum, the air outlet of the rotary drum backblowing air pipe is arranged corresponding to the inner side of the filter cloth on the rotary drum of the pressure filter, the rotary drum is provided with a rotary drum sleeve, the rotary drum sleeve is provided with a rotary drum sleeve mounting hole for fixing the air inlet of the rotary drum backblowing air pipe, the backblowing air distribution block is fixedly arranged on one side of the unloading area of ​​the pressure filter, when the rotary drum is transferred to the unloading area of ​​the pressure filter, the air outlet of the backblowing air distribution block is connected with the air inlet of the corresponding rotary drum backblowing air pipe.

2. A rotary pressure filter unloading device as claimed in claim 1, characterized in that: The scraper device also includes a knife holder and a scraper fixing part. The scraper fixing part is installed in the discharge box of the pressure filter. The middle part of the knife holder is rotatably connected to the discharge box. The scraper resetting device is a spring. The two ends of the spring are respectively fixedly connected to the knife holder and the scraper fixing part. When the scraper touches the crossbeam of the filter drum, it drives the tail of the knife holder to rotate to extend the spring. The spring pulls the tail of the scraper to rotate the knife holder and drive the scraper to reset to complete one unloading.

3. A rotary pressure filter unloading device as claimed in claim 2, characterized in that: A scraper adjustment assembly is provided at the tail end of the tool holder. The scraper adjustment assembly includes a suspension rod and an adjustment member for adjusting the height of the suspension rod. The tail of the tool holder is overlapped on the suspension rod.

4. A rotary pressure filter unloading device as claimed in claim 3, characterized in that: The adjusting member is an adjusting screw, a through hole matching with the adjusting screw is arranged on the suspension rod, an adjusting screw is arranged at both ends of the suspension rod, and a threaded hole matching with the adjusting screw is arranged in the discharge box of the filter.

5. A rotary pressure filter unloading device as claimed in claim 2, characterized in that: The tool holder is of an L-shaped structure, and the corner of the L-shaped tool holder is rotatably connected to the material discharge box.

6. A rotary pressure filter unloading device as claimed in claim 5, characterized in that: A raised conical block is arranged at the corner of the L-shaped tool holder, and the conical block is rotatably connected with the material discharge box.

7. A rotary pressure filter unloading device as claimed in claim 2, characterized in that: The scraper fixing member includes a support rod and mounting blocks fixed at both ends of the support rod, the mounting blocks are provided with mounting holes, the middle part of the support rod is provided with a connecting rod fixed vertically to the support rod, and the connecting rod is fixedly connected to the spring.

8. A rotary pressure filter unloading device as claimed in claim 1, characterized in that: The top of the scraper is provided with an upwardly inclined slope.

9. A rotary pressure filter unloading device as claimed in claim 1, characterized in that: A plurality of drum back-blowing air pipes are evenly arranged in a circle with the drum shaft as the center.

10. A rotary pressure filter unloading device as claimed in claim 1, characterized in that: The gas backflush system also includes a regulating valve for adjusting the backflush gas pressure.

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