Low-loss dehydrator and dehydrator unit

Abstract

The utility model relates to a low-loss dehydrator and a dehydrator unit, and belongs to the technical field of solid-liquid separation, the dehydrator unit comprises a main machine frame, and a main driving roller and a driven roller which are respectively arranged at two ends of the main machine frame, the dewatering unit further comprises a filtering disc connected to the upper end face of the main machine rack and filtering cloth laid above the filtering disc. The filtering cloth annularly moves around the main driving roller and the driven roller. The filtering disc comprises a supporting frame plate and a filtering plate connected to the upper end face of the supporting frame plate, the supporting frame plate is provided with a liquid outlet pipeline used for being connected with the suction filtration assembly, and the filtering plate is provided with a plurality of filtering micropores through which filtrate can pass. According to the low-loss dehydrator provided by the utility model, the filter disc is adopted to replace a traditional adhesive tape, a vacuum box, a sliding table and other structures, the suction filtration structure is simpler, the loss is low, only the filter cloth needs to be replaced regularly, and the equipment is simple in matching structure, low in failure rate and low in maintenance cost.

Description

Technical Field

[0001] The utility model relates to the technical field of solid-liquid separation, in particular to a low-loss dehydrator and a dehydrator unit. Background Art

[0002] At present, domestic solid-liquid separation equipment is mainly divided into positive pressure and vacuum negative pressure. Vacuum negative pressure equipment separates solids and liquids by vacuum negative pressure filtration. For example, the continuous belt vacuum filter, whose filter media are mostly filter cloth and tape or ceramic plate, etc., and cooperate with vacuum box, slide, friction belt, rubber belt and other structures. The vacuum box needs to cooperate with the lifting structure. During operation, the rubber belt fits tightly, and vacuum filtration is carried out simultaneously in the process of the rubber belt driving the filter cloth. The existing vacuum filtration structure is relatively complex, and the coordination of multiple structures often causes excessive losses, maintenance costs, and a high failure rate. At the same time, the existing vacuum belt filters are mostly continuous operations, and need to overcome the vacuum friction to filter, which will also cause very large losses to the filter medium, and need to be replaced frequently to ensure the filtering effect. Utility Model Content

[0003] The purpose of the utility model is to provide a low-loss dehydrator and a dehydrator unit, 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 dehydration unit, comprising a main frame and a main drive roller and a driven roller respectively arranged at both ends of the main frame, the dehydration unit also includes a filter plate connected to the upper end surface of the main frame and a filter cloth laid above the filter plate, the filter cloth performs a circular motion around the main drive roller and the driven roller; the filter plate comprises a support frame plate and a filter plate connected to the upper end surface of the support frame plate, the support frame plate is provided with a liquid outlet pipeline for connecting to a suction filtration assembly, and the filter plate is provided with a plurality of filter micropores that enable filtrate to pass through.

[0005] In a preferred embodiment, the lower end surface of the filter plate is provided with a plurality of support columns distributed at intervals, and the support columns provide a spacing between the filter plate and the support frame plate. The spacing serves as a flow space for the filtrate, facilitating the filtrate to flow into the outlet pipeline.

[0006] In a preferred embodiment, the two longer ends of the support frame are respectively connected with baffles, which are used to position the filter cloth and prevent the material on the filter cloth from spilling from both sides.

[0007] In a preferred embodiment, the support frame plate is a detachable split assembly structure, which is easy to match with host frames of different lengths.

[0008] In a preferred embodiment, the support frame plate is further provided with limiting plates on adjacent sides of the baffle plate, and the limiting plates and the baffle plate cooperate to form a positioning area, and the positioning area is used to limit the position of the filter plate.

[0009] In a preferred embodiment, the filter disc is made of modified polypropylene, which is resistant to acid, alkali and high temperature and can meet the needs of more working conditions.

[0010] On the other hand, the utility model also provides a technical solution for a low-loss dehydrator, including the dehydration unit described in any of the above solutions, and also including a filtration component and a vacuum pump group, wherein the dehydration unit is connected to the vacuum pump group via the filtration component.

[0011] In a preferred embodiment, the filtration assembly includes a filtrate main pipe and filtrate branch pipes respectively connected thereto, the filtrate branch pipes are connected to the liquid outlet pipelines of the support frame plate, and the filtrate main pipe is provided with an atmospheric interface and a vacuum interface.

[0012] In a preferred embodiment, the dehydration units are arranged in two groups, and the two groups of dehydration units are respectively connected to the vacuum pumps in the vacuum pump group through vacuum pipelines. This arrangement can fully utilize the vacuum pumps and avoid energy loss of the vacuum pumps.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The low-loss dehydrator and dehydration unit provided by the utility model adopts a filter disc to replace the traditional adhesive tape, vacuum box, slide and other structures. Its filtration structure is simpler and has low loss. The only loss part that needs to be replaced regularly is the filter cloth. The equipment has a simple matching structure, low failure rate and low maintenance cost. At the same time, the cloth process and the vacuum filtration process are carried out separately, so that the friction of the vacuum negative pressure does not need to be overcome during the movement of the filter cloth, thereby reducing the loss of the filter cloth. On the other hand, by setting two dehydration units to be alternately connected to the same vacuum pump, the vacuum pump can be fully utilized and operated at full load to achieve energy saving and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a dehydration unit provided in an embodiment of the utility model;

[0016] Figure 2 A schematic diagram of the partial structure of a dehydration unit provided in an embodiment of the utility model;

[0017] Figure 3 A schematic diagram of the structure of the filter disc provided in the embodiment of the utility model;

[0018] Figure 4 A rear view of a filter disc provided in an embodiment of the utility model;

[0019] Figure 5 A front view of a filter disc provided in an embodiment of the utility model;

[0020] Figure 6 for Figure 5 Section view in AA direction;

[0021] Figure 7 A schematic diagram of the overall structure of a low-loss dehydrator provided by an embodiment of the utility model;

[0022] Figure 8 A top view of a low-loss dehydrator provided in an embodiment of the utility model.

[0023] The meaning of each number in the figure is:

[0024] 1. Mainframe; 2. Feed valve; 3. Feed hopper; 4. Filter plate; 41. Support frame plate; 411. Liquid outlet pipeline; 412. Baffle plate; 413. Limit plate; 42. Filter plate; 421. Filter micropores; 422. Support column; 5. Filter cloth; 6. Discharge end; 7. Online cleaning unit; 8. Speed ​​reduction motor; 9. Redirection roller; 10. Correction roller; 11. Tensioning roller; 12. Filtrate main pipe; 121. Filtrate branch pipe; 13. Atmospheric valve; 131. Atmospheric interface; 14. Vacuum valve; 141. Vacuum interface; 15. Drain tank; 16. Vacuum pipeline; 17. Vacuum pump; 18. Manual valve. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] See also Figure 1 and Figure 7-Figure 8This embodiment discloses a low-loss dehydrator, including a dehydration unit, a filtration component and a vacuum pump group. The vacuum pump group is connected to the dehydration unit through the filtration component to create a vacuum negative pressure environment for the dehydration unit.

[0028] like Figure 1 As shown, the dehydration unit includes a main frame 1, which supports and connects the dehydration unit as a whole. A feed hopper 3 is provided above one end of the main frame 1, and the feed hopper 3 controls its feeding process through a feed valve 2. A main drive roller and a driven roller are connected to the main frame 1 along its length direction and at both ends. The main drive roller is driven to rotate by a reduction motor 8. A filter cloth 5 is connected around the main drive roller and the driven roller, and the filter cloth 5 performs a circular motion around the main drive roller and the driven roller. The dehydration unit also includes a tensioning roller 11, a deviation correction roller 10 and a redirecting roller 9 connected to the main frame 1. The main structure of the dehydration unit belongs to the prior art, and its structure and principle are not described here.

[0029] Combination Figure 2 The dehydration unit further includes a filter plate 4 fixedly connected to the upper end surface of the main frame 1, and the connection method can be bolted. The filter plate 4 can support the filter cloth 5, and its length roughly matches the length of the main frame 1 and is distributed along the length direction of the main frame 1. The width of the filter plate 4 also roughly matches the width of the main frame 1. In this way, the filter plate 4 can basically cover the upper end surface of the main frame 1 to ensure sufficient filtration area.

[0030] In this embodiment, the filter disc 4 is connected to the vacuum pump group through the suction filtration component, and the filter cloth 5 is laid on the top of the filter disc 4. When the vacuum pump group is started, the material on the filter cloth 5 can be vacuum filtered, and the filtrate flows into the filter disc 4 and into the drainage tank 15 through the suction filtration component.

[0031] Specific, combined Figure 3-Figure 6 The filter disc 4 includes a support frame plate 41 that roughly matches the shape of the upper end surface of the main frame 1 and a filter plate 42 connected to the upper end surface of the support frame plate 41. The support frame plate 41 is fixed with a liquid outlet pipeline 411 for connecting the suction filtration component. The liquid outlet pipeline 411 extends to the bottom of the support frame plate 41. Further, the filter plate 42 is provided with a plurality of filter micropores 421 that allow the filtrate to pass through. The filtered filtrate flows out through the filter micropores 421 and is collected at the liquid outlet pipeline 411, and flows into the suction filtration component through the liquid outlet pipeline 411.

[0032] For more details, see Figure 6The lower end surface of the filter plate 42 is fixed with a plurality of support columns 422 distributed at intervals. The filter plate 42 is connected to the support frame plate 41 through the support columns 422. The support columns 422 can create a certain distance between the filter plate 42 and the support frame plate 41. The distance serves as a flow space for the filtrate, facilitating the filtrate to flow into the outlet pipeline 411.

[0033] Preferably, the filter disc 4 is made of modified polypropylene, which is not only resistant to acid and alkali, but also resistant to high temperature, and can meet the needs of more working conditions. The modified polypropylene material is an existing commercially available material.

[0034] In this embodiment, baffle plates 412 are fixedly provided on both sides of the overall longer end of the support frame plate 41, respectively, for positioning the filter cloth 5 and preventing the material on the filter cloth 5 from spilling from both sides.

[0035] The support frame plate 41 can be integrally formed or separately combined. Correspondingly, the filter plate 42 can also be integrally formed or separately combined, depending on actual needs. In order to facilitate matching with the host frame 1 of different lengths, preferably, the support frame plate 41 and the filter plate 42 are respectively set in a separate combination form, and each support frame plate 41 is detachably connected by bolts, and the filter plate 42 is correspondingly installed on the top of the support frame plate 41. More preferably, the support frame plate 41 is also provided with a limit plate 413 on the adjacent side of the baffle plate 412, and a positioning area can be formed by the cooperation of the limit plate 413 and the baffle plate 412, which is used to limit and position the position of the filter plate 42. When installing, the filter plate 42 of the appropriate size can be placed within the positioning area.

[0036] Combination Figure 7 and Figure 8 The filtration assembly includes a filtrate main pipe 12 and filtrate branch pipes 121 respectively connected thereto, the filtrate branch pipes 121 are connected to the liquid outlet pipe 411 of the support frame plate 41, the filtrate main pipe 12 is provided with an atmospheric interface 131 and a vacuum interface 141, the atmospheric interface 131 is provided with an atmospheric valve 13, the vacuum interface 141 is provided with a vacuum valve 14, the vacuum interface 141 is used to connect a vacuum pump group, the vacuum pump group further includes a drain tank 15 and a vacuum pump 17 connected by a vacuum pipeline 16, the structure of the vacuum pump group is the prior art, and its structure and principle are not described in detail here.

[0037] In actual application, the material to be dehydrated enters the filter cloth 5 laid on the top of the filter disc 4 from the feed hopper 3, and is driven by the reduction motor 8 to move toward the discharge end 6. As the filter cloth 5 moves, the material is evenly spread on the filter cloth 5 corresponding to the filter disc 4. When the material is completely spread on the filter disc 4, the PLC in the main control cabinet sends a signal, the feed valve 2 and the reduction motor 8 stop moving, and at the same time the atmospheric valve 13 is closed, the vacuum valve 14 is opened, and the running vacuum pump 17 plays a role. At this time, the filtered material and the filter cloth 5 and the filter are separated. The plate 4, the filtrate main pipe 12 and the drain tank 15 form a vacuum negative pressure, the water in the material is separated and enters the drain tank 15, and then flows to the collection tank due to gravity. At this time, the PLC of the main control cabinet sends a signal again, the feed valve 2 and the atmospheric valve 13 are opened, the reduction motor 8 starts to run, and the vacuum valve 14 is closed. At this time, the material that has been filtered on the filter cloth 5 begins to separate from the filter cloth 5 through the discharge end 6, and the filter cloth 5 continues to run to the online cleaning part 7 for online cleaning. At the same time, the material is spread on the filter cloth 5 again through the feed valve 2, and a filtering cycle is completed. In this embodiment, the feeding and vacuuming time are controlled by the PLC, and the time can be adjusted according to the specific requirements of the material dehydration water content.

[0038] Preferably, in the vacuum pump assembly, the vacuum pipeline 16 is also connected to a manual valve 18 for use when overhauling the equipment or replacing parts.

[0039] In this embodiment, by setting a filter plate 4 made of a specific material to cooperate with the filter cloth 5 and the vacuum pump group, its filtration structure is simpler, and the only wearable part that needs to be replaced regularly is the filter cloth 5. It is easy to install, has a low failure rate, low loss, and low maintenance cost. On the other hand, in this embodiment, when the material is spread on the filter plate 4, vacuum filtration is not performed. At this time, the filter cloth 5 moves on the filter plate 4, and there is only contact friction, and there is no need to overcome the friction of the vacuum. Therefore, the output torque of the reduction motor 8 is also relatively small; when the material is laid flat, the feed valve 2 and the reduction motor 8 are closed, and the vacuum valve 14 and the vacuum pump 17 are started. At this time, vacuum filtration and dehydration are performed, and the filter cloth 5 and the filter plate 4 are relatively static and there is no friction. This setting will not cause significant wear to the filter cloth 5 during the feeding and dehydration process, and the service life of the filter cloth 5 will also be longer.

[0040] It is understandable that in actual applications, the vacuum pump 17 cannot be started and stopped frequently and needs to be in operation all the time. In order to avoid energy loss of the vacuum pump 17, in another embodiment, the dehydration units in the low-loss dehydrator are set as two groups, that is, the two groups of dehydration units are connected to the vacuum pump 17 through separate vacuum pipelines 16, and the same vacuum pump 17 drives the two dehydration units to perform dehydration operations, thereby saving the purchase cost of the vacuum pump 17 and the subsequent maintenance cost.

[0041] For the convenience of distinction, the two groups of dehydration units are defined as dehydration unit A and dehydration unit B respectively. When the feed valve 2, reduction motor 8, atmospheric valve 13 and vacuum valve 14 of dehydration unit A are opened, the feed valve 2, reduction motor 8, atmospheric valve 13 and vacuum valve 14 of dehydration unit B are closed. At this time, dehydration unit A is in the process of laying materials on the filter cloth 5, while dehydration unit B is in the process of vacuum filtration of materials; vice versa. This structural setting enables the two dehydration units to use the vacuum pump 17 alternately, so that the vacuum pump 17 can work at full load without no load.

[0042] The low-loss dehydrator provided in this embodiment adopts a filter plate 4 to replace the traditional adhesive tape, vacuum box, slide and other structures. Its suction filtration structure is simpler and has low loss. The only loss part that needs to be replaced regularly is the filter cloth 5. In addition, this embodiment has a simple matching structure, low failure rate and low maintenance cost. At the same time, by setting two dehydration units to be alternately connected to the same vacuum pump 17, the vacuum pump 17 can be fully utilized to make it work at full load to achieve energy saving and efficiency improvement.

[0043] 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 dehydration unit, comprising a main frame (1) and a main drive roller and a driven roller respectively arranged at two ends of the main frame (1), characterized in that: The dehydration unit further comprises a filter plate (4) connected to the upper end surface of the main frame (1) and a filter cloth (5) laid on the top of the filter plate (4), wherein the filter cloth (5) performs a circular motion around the main drive roller and the driven roller; The filter disc (4) comprises a support frame plate (41) and a filter plate (42) connected to the upper end surface of the support frame plate (41); the support frame plate (41) is provided with a liquid outlet pipeline (411) for connecting to a suction filtration assembly; and the filter plate (42) is provided with a plurality of filter micropores (421) through which filtrate can pass.

2. The dehydration unit according to claim 1, characterized in that: The lower end surface of the filter plate (42) is provided with a plurality of groups of support columns (422) distributed at intervals, and the support columns (422) allow a distance to exist between the filter plate (42) and the support frame plate (41).

3. The dehydration unit according to claim 1, characterized in that: The two side ends of the support frame plate (41) are respectively connected to baffle plates (412).

4. The dehydration unit according to claim 3, characterized in that: The support frame plate (41) is a detachable split assembly structure.

5. The dehydration unit according to claim 4, characterized in that: The support frame plate (41) is also provided with limiting plates (413) on adjacent sides of the baffle plate (412), and a positioning area is formed by the cooperation of the limiting plates (413) and the baffle plate (412), and the positioning area is used to limit the position of the filter plate (42).

6. The dehydration unit according to claim 1, characterized in that: The filter disc (4) is made of modified polypropylene.

7. A low-loss dehydrator, characterized in that: The dehydration unit comprises the dehydration unit according to any one of claims 1 to 6, and further comprises a suction filtration component and a vacuum pump group, wherein the dehydration unit is connected to the vacuum pump group via the suction filtration component.

8. The low-loss dehydrator according to claim 7, characterized in that: The filtration assembly comprises a filtrate main pipe (12) and filtrate branch pipes (121) respectively connected thereto, the filtrate branch pipes (121) being connected to a liquid outlet pipeline (411) of a support frame plate (41), and the filtrate main pipe (12) being provided with an atmospheric interface (131) and a vacuum interface (141).

9. The low-loss dehydrator according to claim 7, characterized in that: The dehydration units are arranged in two groups, and the two groups of dehydration units are respectively connected to the vacuum pumps (17) in the vacuum pump group through vacuum pipelines (16).

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