Vacuum drum concentration device and belt filter

Abstract

The utility model relates to a vacuum drum concentrating device and a belt filter, the concentrating device comprises a drum rack, a drum concentrating part, a feeding part and a collecting hopper, the drum concentrating part comprises a rotatable suction filtration roll shaft and filter cloth connected to the surface of the suction filtration roll shaft; at least one end of the suction filtration roller shaft is respectively connected with a vacuum pump set and a compressed air source through a distribution joint assembly; the feeding part is arranged above the rotary drum concentration part and comprises a feeding cavity and connecting shafts fixedly arranged at the two ends of the feeding cavity, a plurality of feeding pipelines are fixedly arranged at the upper end of the feeding cavity in the axial direction, and the two sides of the bottom end of the feeding cavity are each provided with two sets of second discharging openings in the axial direction; and the collecting hopper is arranged below the concentrating part of the rotary drum and is provided with an overflow port. The concentration device provided by the utility model is compact in design structure, can be directly arranged on a main machine frame of the belt type vacuum filter, and is matched with vacuum negative pressure suction filtration and compressed air source back flushing, so that concentrated materials directly enter the belt type vacuum filter, and the two working procedures are seamlessly connected.

Description

Technical Field

[0001] The utility model relates to the technical field of solid-liquid separation, in particular to a vacuum drum concentrator and a belt filter. Background Art

[0002] At present, the belt filter (belt vacuum filter) commonly used in the solid-liquid separation industry cannot process materials with too low solid content. For materials with too low solid content, large-scale mechanical equipment such as thickeners are usually used to pre-treat the materials, that is, to precipitate and concentrate the materials in advance to increase the solid content of the materials and meet the processing conditions of the belt vacuum filter. However, traditional thickeners are mostly large-scale mechanical equipment, which not only occupy a large area, but also have a long construction period and high maintenance costs; on the other hand, when using traditional thickeners, the materials concentrated by the thickener need to be transferred to the belt filter, and the connection between the two processes often greatly restricts the operating efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a vacuum drum concentrator and a belt filter, which can solve the technical problems mentioned in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vacuum drum concentrating device, comprising a drum frame and a drum concentrating part, a feeding part and a collecting hopper connected to the drum frame, the drum concentrating part comprising a rotatable suction roller shaft and a filter cloth connected to the surface of the suction roller shaft, at least one end of the suction roller shaft is respectively connected to a vacuum pump group and a compressed air source through a distribution joint assembly; the feeding part is arranged above the drum concentrating part, comprising a feeding chamber and a connecting shaft fixedly arranged at both ends of the feeding chamber, a plurality of feeding pipelines are fixedly arranged at the upper end of the feeding chamber along the axial direction, and two groups of second discharge ports are respectively arranged at both sides of the bottom end of the feeding chamber along the axial direction; the collecting hopper is arranged below the drum concentrating part and is provided with an overflow port.

[0005] In one embodiment, the filtration roller includes a roller body and two shaft ends fixed on the two end surfaces of the roller body. The interior of the roller body is a cavity, and the surface of the roller body is provided with a plurality of filtration holes along the circumferential direction, and the shaft ends are provided with a plurality of shaft holes connected to the filtration holes along the axial direction.

[0006] In one embodiment, the drum frame is connected to a fixed seat and a slewing bearing connected to the fixed seat, and the shaft end is fixedly provided with a connecting flange for cooperating with the rotating end of the slewing bearing.

[0007] In one embodiment, the distribution joint assembly includes a ceramic dynamic ring, a ceramic static ring and a static distribution head connected in sequence, the ceramic dynamic ring is fixedly connected to the end face of the shaft end, and is provided with a plurality of through holes corresponding to the shaft hole, the ceramic static ring and the static distribution head are fixedly arranged, and are respectively provided with a plurality of corresponding distribution holes, the static distribution head is connected with a plurality of distribution interfaces respectively connected to the distribution holes, and the distribution interfaces are respectively connected to the vacuum pump group and the compressed gas source.

[0008] In one embodiment, the lower end of the feed pipeline extends into the feeding cavity, and a plurality of first discharge ports are provided at the lower end of the feed pipeline along the circumferential direction.

[0009] In one embodiment, the lower side of the collecting hopper is configured as an overflow opening.

[0010] In one embodiment, an air blowing pipeline is provided inside the collecting hopper, and the air blowing pipeline is provided with a plurality of air outlet holes.

[0011] On the other hand, the utility model further provides a technical solution for a belt filter, comprising the vacuum drum concentrator described in any of the above solutions, wherein the vacuum drum concentrator corresponds to the feed end position of the belt filter.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the vacuum drum concentrating device provided by the utility model has a compact design structure and a small size, can be directly installed on the main frame of the belt vacuum filter, adopts a large-diameter drum, cooperates with vacuum negative pressure filtration and compressed air source backblowing, so that the concentrated material directly enters the belt vacuum filter, the two processes are seamlessly connected, and the concentration of the material when entering the belt vacuum filter can meet the processing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the vacuum drum concentrator in the embodiment of the utility model;

[0014] Figure 2 An exploded view of the cooperation between the filtration shaft roller and the distribution joint assembly in the embodiment of the utility model;

[0015] Figure 3 It is a top view of the vacuum drum concentrator in the embodiment of the utility model;

[0016] Figure 4 for Figure 3 Section view in AA direction;

[0017] Figure 5 It is a top view of the feeding part in the embodiment of the utility model;

[0018] Figure 6 for Figure 5Cross-sectional view in the BB direction;

[0019] Figure 7 It is a bottom view of the feeding part in the embodiment of the utility model;

[0020] Figure 8 This is a schematic diagram of the structure of the collecting hopper in the embodiment of the utility model;

[0021] Fig. 9 It is a schematic diagram of the cooperation between the vacuum drum concentrator and the belt filter in the embodiment of the utility model.

[0022] The meaning of each number in the figure is:

[0023] 1. Drum frame; 2. Main frame; 3. Filter roller; 31. Roller body; 311. Groove; 312. Filter hole; 313. Z-shaped pipe; 32. Shaft end; 321. Connecting flange; 322. Shaft hole; 4. Distribution joint assembly; 41. Ceramic moving coil; 411. Through hole; 42. Ceramic stationary coil; 421. First distribution hole; 43. Stationary distribution head; 431. Second distribution hole; 432. Vacuum interface; 433, backblowing interface; 434, ear plate; 5, fixed seat; 6, slewing bearing; 7, reducer; 8, transmission part; 9, distribution fixed plate; 10, feeding chamber; 11, connecting shaft; 12, feed pipeline; 121, first discharge port; 13, second discharge port; 14, collecting hopper; 141, overflow port; 15, air blowing pipeline; 16, filter cloth; 17, belt filter (belt vacuum filter). DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] 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" 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 device or element referred to 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.

[0026] See also Figure 1The present embodiment discloses a vacuum drum concentrating device, including a drum frame 1, which is used to support and bear the entire device. The drum frame 1 is fixedly connected to a main frame 2 of a belt vacuum filter 17, and corresponds to the filtering front end of the belt vacuum filter 17, that is, the feed inlet position. The material concentrated by the vacuum drum concentrating device directly enters the belt vacuum filter 17 for pressure filtration.

[0027] Specifically, the drum frame 1 is connected to a feeding section, a drum concentrating section and a collecting hopper 14. The material to be concentrated is fed from the feeding section and collected in the drum concentrating section. The material concentrated in the drum concentrating section falls into the collecting hopper 14 and enters the filter belt of the belt vacuum filter 17 from the collecting hopper 14.

[0028] The drum concentrating section includes a suction roller shaft 3 rotatably connected to the drum frame 1 and a filter cloth 16 installed on the surface of the suction roller shaft 3. One end of the suction roller shaft 3 is connected to a vacuum pump group and a compressed air source through a distribution joint assembly 4.

[0029] like Figure 2 As shown, the filtration roller 3 includes a roller body 31 and two shaft ends 32 fixedly arranged at both end surfaces of the roller body 31. The roller body 31 is used for mounting and supporting the filter cloth 16 and for sucking the filtrate, and its surface is coated with corrosion-resistant rubber. In this embodiment, the filter cloth 16 is tightly fitted to the rubber surface of the roller body 31. The roller body 31 is provided with a groove 311 for fixing the filter cloth 16 along the axial direction. When installing the filter cloth 16, the two overlapping ends of the filter cloth 16 are placed in the groove 311, and then the filter cloth 16 is fixed in the groove 311 by a pressing plate, and the pressing plate is fixed by bolts. The other two sides of the filter cloth 16 are pressed tightly on the roller body 31 by Velcro.

[0030] See again Figure 1 The drum frame 1 is fixedly connected to a fixing seat 5 at both connecting ends, and a slewing bearing 6 for providing support for the filtration roller shaft 3 is connected through the fixing seat 5. The shaft end 32 of the filtration roller shaft 3 is fixedly provided with a connecting flange 321, which is fixedly connected to the rotating end of the slewing bearing 6 through the connecting flange 321.

[0031] The drum concentrating section further includes a reducer 7 for driving the filtration roller shaft 3 to rotate. The reducer 7 is fixedly connected to the drum frame 1, and its output end is connected to one shaft end 32 of the filtration roller shaft 3 through a transmission member 8. The transmission member 8 is preferably a transmission belt with less noise.

[0032] Combination Figure 3 and Figure 4 The interior of the roller body 31 is a cavity, and a group of suction holes 312 are provided on the surface of the roller body 31 along the circumferential direction. Figure 2The group of suction holes 312 is multiple and is distributed at equal intervals. Correspondingly, one of the shaft ends 32 is provided with a plurality of shaft holes 322 corresponding to the suction holes 312 along the axial direction, and the suction holes 312 and the shaft holes 322 are connected by a plurality of Z-shaped pipes 313. When the concentration operation is performed, under the action of the vacuum pump group, the filtrate will enter the Z-shaped pipe 313 through the suction holes 312, and then be discharged from the shaft hole 322 of the shaft end 32.

[0033] In one embodiment, the filtration holes 312 can be arranged into multiple groups along the axial direction of the roller body 31, and the filtration holes 312 in different groups correspond to each other in the axial direction, and the corresponding filtration holes 312 are connected to the same Z-shaped pipe 313, so as to speed up the concentration process.

[0034] Based on the above embodiment, preferably, the vacuum pump group and the compressed air source are set to two, respectively connected to the two shaft ends 32 of the filtration roller shaft 3, and correspondingly, the other shaft end 32 of the filtration roller shaft 3 is also provided with a plurality of shaft holes 322 and corresponding Z-shaped pipes 313, and the Z-shaped pipes 313 at both ends are respectively connected to the filtration holes 312 on the corresponding sides. Simultaneous filtration at both ends can further improve the operating efficiency. In practical applications, one-way filtration or two-way filtration can be selected according to the actual liquid extraction flow rate. When one-way filtration is selected, the other end can be blocked.

[0035] It is understandable that the device can be combined with the specifications of the belt filter 17 and use a roller body 31 with a larger diameter as much as possible to increase the filtration area and improve the filtration efficiency.

[0036] Combination Figure 2The distribution joint assembly 4 includes a ceramic moving coil 41, a ceramic stationary coil 42 and a stationary distribution head 43 connected in sequence, wherein the ceramic moving coil 41 is constructed as a circular plate matching the shaft end 32 of the filtration roller shaft 3, and is made of wear-resistant ceramic material, and is fixedly connected to the end face of the shaft end 32. For example, the connection method can be bonding or hot pressing connection, and the ceramic moving coil 41 rotates synchronously with the roller body 31. The ceramic moving coil 41 is provided with a plurality of through holes 411 corresponding to the shaft hole 322 of the shaft end 32, and the other side of the ceramic moving coil 41 is attached to the ceramic stationary coil 42. The ceramic stationary coil 42 and the stationary distribution head 43 are fixedly arranged. The ceramic stationary coil 42 is also made of wear-resistant ceramic material, and is constructed as a circular plate matching the ceramic moving coil 41, and is provided with a plurality of first distribution holes 421 corresponding to the through holes 411. The first distribution holes 421 can be set as a circle or an arc according to actual needs, and the arc corresponds to the plurality of through holes 411 of the ceramic moving coil 41. The static distribution head 43 is fixedly connected to the ceramic static ring 42, and its connected end face is provided with a second distribution hole 431 corresponding to the first distribution hole 421, and the other end face is provided with a plurality of distribution interfaces respectively connected to the second distribution hole 431. The upper distribution interface is a vacuum interface 432, which is connected to a vacuum pump group through a vacuum pipeline. The vacuum interface 432 can also be set to two groups according to the filtration requirements. It should be noted here that the vacuum interface 432 should be of the same specification as the vacuum interface 432 of the belt filter 17, so that it can be directly connected to the vacuum main pipe of the belt filter 17 to save costs and provide convenience for the later modification of the belt filter 17. It can also be connected to a separate vacuum pump group to improve the filtration effect; the lower distribution interface is a backblowing interface 433, which is used to connect a compressed gas source, and the high-pressure gas enters the filtration hole 312 from here to achieve backblowing.

[0037] In this embodiment, a plurality of ear plates 434 are fixedly provided on the outer edge of the static dispensing head 43 , and correspondingly, a dispensing fixing plate 9 is fixedly connected to the drum frame 1 , which is sleeved on the shaft end 32 and has mounting holes for connecting the ear plates 434 .

[0038] Combination Figure 5-Figure 7The feeding part is arranged above the drum concentrating part, including a feeding chamber 10 and connecting shafts 11 fixedly arranged at both ends of the feeding chamber 10, and the connecting shaft 11 is fixedly connected to the top of the drum frame 1. In this embodiment, the feeding chamber 10 is constructed as a long cavity that roughly matches the length of the roller body 31, and a plurality of feeding pipelines 12 are fixedly arranged at its upper end along the axial direction of the feeding chamber 10, and the lower end of the feeding pipeline 12 extends into the feeding chamber 10, and the bottom end of the feeding pipeline 12 is closed, and a plurality of first discharge ports 121 are arranged at the lower end along the circumferential direction. The setting of the feeding pipeline 12 can evenly disperse the material, so as to control the discharge speed and improve the discharge uniformity. The bottom of the feeding chamber 10 is provided with a second discharge port 13, which is a long strip structure and is arranged along the axial direction of the feeding chamber 10. The second discharge port 13 is arranged in two groups, which are arranged at both sides of the bottom of the feeding chamber 10, respectively. The material to be concentrated falls onto the filter cloth 16 at the top of the roller body 31 through the second discharge port 13. The setting of the second discharge port 13 can make the material evenly distributed on the filter cloth 16 at the top of the suction roller shaft 3, and increase the contact area with the filter cloth 16, so that the suction filtration effect is better.

[0039] Combination Figure 8 The collecting hopper 14 is arranged below the drum concentrating part, and its bottom end is fixedly connected to the drum frame 1 through a reinforcing plate. The length of the collecting hopper 14 is slightly longer than the roller body 31, and its collecting range can fully cover the material dropping range of the roller body 31. The collecting hopper 14 is provided with an overflow port 141, and the overflow port 141 is on the same side as the backflush interface 433 to increase the concentration of the overflow material as much as possible. In this embodiment, the overflow port 141 is constructed as a lower side of the collecting hopper 14, and the material concentrated by the suction roller 3 falls into the collecting hopper 14. When the material overflows, it overflows from this side to the filter belt of the belt filter 17.

[0040] In one embodiment, an air blowing pipeline 15 is connected to the collecting hopper 14, one end of which extends out of the collecting hopper 14 and is connected to a compressed air source. The portion of the air blowing pipeline 15 inside the collecting hopper 14 is provided with a plurality of air outlets to prevent material sedimentation by air blowing stirring.

[0041] In one embodiment, the collecting hopper 14 is made of PP material, which not only reduces the weight of the equipment, but also has excellent corrosion resistance and a long service life.

[0042] Fig. 9The schematic diagram of the device is shown. When used, the device is installed on the belt filter 17. First, the vacuum pump group is started. The vacuum pump acts on the surface of the roller body 31 through the vacuum interface 432 in the distribution joint assembly 4 to form a negative pressure environment. The material to be concentrated is evenly distributed on the filter cloth 16 corresponding to the top of the roller body 31 from the feeding part. Part of the liquid enters the suction hole 312 of the suction roller 3 through the filter cloth 16 under the action of vacuum, and flows into the vacuum main pipe along the internal Z-shaped pipeline 313 and the vacuum interface 432 to achieve the purpose of reducing the moisture content. The material with low moisture content is adsorbed on the outer wall of the roller body 31. At the same time, the reducer 7 drives the suction roller 3 to rotate. When the material with low moisture content rotates to the corresponding position of the backblowing interface 433, the compressed air introduced into the backblowing interface 433 blows the material off the surface of the roller body 31 and falls into the collecting hopper 14. Then, the material overflows from the collecting hopper 14 to the filter belt of the belt filter 17 for further dehydration.

[0043] The vacuum drum concentrator provided in this embodiment has a compact structure and a small size, and can be directly installed on the belt vacuum filter 17. It uses a large-diameter drum and cooperates with vacuum negative pressure filtration to ensure that the concentration of the material when entering the belt vacuum filter 17 meets the processing requirements.

[0044] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A vacuum drum concentrator, characterized in that: The invention comprises a drum frame (1) and the following connected to the drum frame (1): The rotary drum concentration section comprises a rotatable suction roller shaft (3) and a filter cloth (16) connected to the surface of the suction roller shaft (3), wherein at least one end of the suction roller shaft (3) is respectively connected to a vacuum pump group and a compressed air source through a distribution joint assembly (4); The feeding section is arranged above the drum concentrating section, and comprises a feeding chamber (10) and connecting shafts (11) fixedly arranged at both ends of the feeding chamber (10); a plurality of feeding pipelines (12) are fixedly arranged at the upper end of the feeding chamber (10) along the axial direction, and two groups of second discharge ports (13) are respectively arranged at both sides of the bottom end of the feeding chamber (10) along the axial direction; The collecting hopper (14) is arranged below the drum concentrating section and is provided with an overflow port (141).

2. The vacuum drum concentrator according to claim 1, characterized in that: The filtration roller (3) comprises a roller body (31) and two shaft ends (32) fixedly arranged on both end surfaces of the roller body (31); the interior of the roller body (31) is a cavity, and a plurality of filtration holes (312) are arranged on the surface of the roller body (31) along the circumferential direction; and a plurality of shaft holes (322) connected to the filtration holes (312) are arranged on the shaft ends (32) along the axial direction.

3. The vacuum drum concentrator according to claim 2, characterized in that: The drum frame (1) is connected to a fixed seat (5) and a slewing bearing (6) connected to the fixed seat (5), and the shaft end (32) is fixedly provided with a connecting flange (321) for matching with the rotating end of the slewing bearing (6).

4. The vacuum drum concentrator according to claim 2, characterized in that: The distribution joint assembly (4) includes a ceramic dynamic coil (41), a ceramic static coil (42) and a static distribution head (43) which are connected in sequence. The ceramic dynamic coil (41) is fixedly connected to the end face of the shaft end (32) and is provided with a plurality of through holes (411) corresponding to the shaft hole (322). The ceramic static coil (42) and the static distribution head (43) are fixedly arranged and are respectively provided with a plurality of corresponding distribution holes. The static distribution head (43) is connected with a plurality of distribution interfaces which are respectively connected to the distribution holes. The distribution interfaces are respectively connected to a vacuum pump group and a compressed gas source.

5. The vacuum drum concentrator according to claim 1, characterized in that: The lower end of the feed pipeline (12) extends into the feeding chamber (10), and a plurality of first discharge ports (121) are provided at the lower end of the feed pipeline (12) along the circumferential direction.

6. The vacuum drum concentrator according to claim 1, characterized in that: The lower side of the collecting hopper (14) is configured as an overflow port (141).

7. The vacuum drum concentrator according to claim 1, characterized in that: An air blowing pipeline (15) is arranged inside the collecting hopper (14), and the air blowing pipeline (15) is provided with a plurality of air outlet holes.

8. A belt filter, characterized in that: It comprises the vacuum drum concentrator according to any one of claims 1 to 7, wherein the vacuum drum concentrator corresponds to the feed end position of the belt filter (17).

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