White water filtering device for paper machine

Abstract

The utility model discloses a paper machine white water filtering device, and belongs to the field of equipment for separating fillers such as paper pulp fibers and titanium dioxide in white water in the papermaking process. Comprising a shell, and a white water feeding mechanism, a filtering mechanism, a filtrate collecting mechanism and a filler recycling mechanism are arranged in the shell. The filtering mechanism is used for filtering the white water. And the white water feeding mechanism comprises a liquid inlet pipe arranged above the filtering mechanism. The filtrate collecting mechanism is used for collecting the clear water filtered by the filtering mechanism. And the filler recycling mechanism is used for cleaning the filtering mechanism and collecting the filler in the white water at the same time. The device is simple in structure and low in operation cost, and paper pulp fibers, titanium dioxide and other fillers in the paper machine white water can be continuously separated and recycled.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of papermaking process, and particularly relates to a paper machine white water filtering device. BACKGROUND

[0002] In the papermaking process, a paper machine can generate a large amount of paper machine white water, which contains a certain amount of paper pulp fibers, titanium dioxide and other fillers. At present, most enterprises directly discharge the paper machine white water, which has obvious defects: on the one hand, the paper pulp fibers, titanium dioxide and other fillers in the white water are not recycled, causing serious waste of resources and increasing the raw material cost of the enterprise; on the other hand, the white water containing fillers and fibers directly discharged will pollute the surrounding water environment, which does not meet the requirements of environmental protection production.

[0003] If the traditional filtering equipment is used to treat the paper machine white water, the existing equipment often has problems such as low filtering efficiency and poor filler recovery rate, which is difficult to meet the needs of the enterprise to efficiently and low-cost recycle the paper machine white water. CONTENT OF THE INVENTION

[0004] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, provide a paper machine white water filtering device, which has simple structure, low running cost and can continuously separate and recycle the paper pulp fibers and titanium dioxide and other fillers in the paper machine white water.

[0005] The technical scheme adopted by the present application to solve the existing problems is:

[0006] A paper machine white water filtering device, comprising a housing. The housing is internally provided with a white water feeding mechanism, a filtering mechanism, a filtrate collecting mechanism and a filler recycling mechanism.

[0007] The filtering mechanism comprises two rotating rollers arranged at intervals and rotatably connected with the housing, the output shaft of a driving device fixedly connected with the housing is connected with the rotating shaft of one of the rotating rollers, and an annular filtering belt is sleeved on the two rotating rollers.

[0008] The white water feeding mechanism comprises an inlet pipe arranged above the filtering belt.

[0009] The filtrate collecting mechanism comprises a water collecting tank located in the middle of the upper and lower filtering belts, the water collecting tank is fixedly connected with the housing, and the outlet of a water discharge pipe of the water collecting tank penetrates to the outside of the housing.

[0010] The filler recycling mechanism comprises a scraper arranged at the bottom of the filtering belt, and the scraper abuts against the horizontal surface of the downward arranged filtering belt.

[0011] The side wall of the housing is provided with a discharge port arranged corresponding to the filler recycling mechanism.

[0012] Preferably, the filter belt width direction is provided with U-shaped clamping edges on both sides, and the openings of the U-shaped clamping edges of the upper and lower filter belts are oppositely arranged.

[0013] The roller shaft is provided with support discs on both sides, and the U-shaped clamping edges of the filter belt end are sleeved outside the support discs.

[0014] Preferably, the white water feeding mechanism comprises a buffer inclined plate, the buffer inclined plate is located above the water collecting tank, and the bottom of the buffer inclined plate is clamped on the inner side of the two U-shaped clamping edges of the upper filter belt.

[0015] The outlet of the liquid inlet pipe is oppositely arranged with the buffer inclined plate.

[0016] Preferably, the filtrate collecting mechanism comprises two upper support tabs, the two upper support tabs are inserted into the inner sides of the U-shaped clamping edges on both sides of the upper filter belt, a plurality of upper connecting plates are fixedly arranged in the middle of the two upper support tabs, and the top surface of the water collecting tank with an upward opening is fixedly connected with the upper support tabs.

[0017] Preferably, the inner sides of the U-shaped clamping edges on both sides of the lower filter belt are inserted with lower support tabs, the lower support tabs are fixedly connected with the water collecting tank, an abutting plate is connected between the two lower support tabs, the bottom surface of the abutting plate abuts against the top surface of the lower filter belt, and the scraper abuts against the filter belt in contact with the abutting plate.

[0018] Preferably, the buffer inclined plate and the scraper are respectively arranged at diagonal positions on the upper and lower sides of the filter belt.

[0019] Preferably, the scraper is connected with an adjusting mechanism, and the adjusting mechanism controls the upward and downward movement of the scraper.

[0020] Preferably, the bottom of the vertically arranged scraper is fixedly connected with a horizontally arranged bottom plate, and at least two vertically arranged slide rods are fixedly arranged below the bottom plate.

[0021] The adjusting mechanism comprises two inclined surfaces of two inclined blocks oppositely arranged, a support table and a screw rod, the support table is fixedly connected with the shell, the inclined blocks are slidably connected with the support table, the slide rods pass through the through holes on the support table, and the bottom of the bottom plate abuts against the inclined surfaces of the two inclined blocks.

[0022] The screw rod is provided with two thread parts with opposite rotation directions, the two thread parts are respectively threadedly connected with the threaded holes of the two inclined blocks, and the end of the screw rod passes through the shell to the outside of the shell.

[0023] Preferably, the outer side of the U-shaped clamping edge is provided with a clamping device, the clamping device comprises a roller arranged in an axial direction and a U-shaped frame, and the circumferential surface of the roller abuts against the outer side surface of the U-shaped clamping edge.

[0024] The opening of the U-shaped frame is outwardly arranged, the vertical rod of the U-shaped frame is coaxially arranged with the roller, the roller is sleeved on the vertical rod of the U-shaped frame, and the end of the horizontal rod of the U-shaped frame is provided with a limiting disc and a spring seat in the middle.

[0025] The horizontal rod of the U-shaped frame passes through the support plate, the support plate is fixedly connected with the water collecting tank or the shell, and the spring is sleeved on the horizontal rod of the U-shaped frame, and the two ends of the spring are respectively abutted with the spring seat and the support plate.

[0026] Preferably, a plurality of convex points are convexly arranged on the circumferential surface of the roller.

[0027] Compared with the prior art, the application has the beneficial effects:

[0028] (1) The filter belt is continuously rotated to filter the white water, the filtered clean water enters the water collecting tank, the filler is retained on the filter belt, and then is scraped off by the scraper of the filler recovery mechanism below the filter belt, collected, and the filler recovery rate can reach more than 85%.

[0029] (2) Through the setting of the filler recovery mechanism, the filter belt can be self-cleaned and the filler can be recovered, so that the filter belt can continuously filter the filler in the white water, and the filtering efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0030] The application will be further described below in combination with the drawings and examples.

[0031] Figure 1 A paper machine white water filtering device structure diagram,

[0032] Figure 2 A paper machine white water filtering device shell partial sectional view,

[0033] Figure 3 A paper machine white water filtering device internal first structure diagram,

[0034] Figure 4 A paper machine white water filtering device internal second structure diagram,

[0035] Figure 5 A paper machine white water filtering device internal structure first sectional view,

[0036] Figure 6 A paper machine white water filtering device, Figure 5 A local enlarged view of A,

[0037] Figure 7 A paper machine white water filtering device roller sectional view,

[0038] Figure 8 A paper machine white water filtering device filter belt sectional view,

[0039] Figure 9 This is a structural diagram of the inner side support device of the filter belt in the white water filtration device of a paper machine in this application.

[0040] Figure 10 This is a cross-sectional view of the internal scraper of a white water filtration device for a paper machine in this application.

[0041] In the figure: 1-roller, 101-support plate, 2-filter belt, 201-U-shaped card edge, 3-upper supporting convex plate, 4-upper connecting plate, 5-lower supporting convex plate, 6-lower connecting plate, 7-abutment plate, 8-water collecting trough, 801-drain pipe, 9-support plate, 10-connecting plate, 11-roller, 1101-convex point, 12-U-shaped frame, 1201-limiting plate, 1202-spring seat, 13-spring, 14-liquid inlet pipe, 1401-expansion port, 15-buffer inclined plate, 1501-protective cover, 16-scraper, 1601-bottom plate, 1602-slide rod, 17-oblique block, 18-support table, 1801-chute, 19-screw, 20-handwheel, 21-drive device, 22-housing, 2201-discharge port, 2202-guide inclined plate. DETAILED DESCRIPTION

[0042] The accompanying drawings are the best embodiments of the paper machine white water filtration device. The present application will be further described in detail below in conjunction with the accompanying drawings.

[0043] Depend on Figures 1 to 10 As shown, a paper machine white water filtering device includes a shell 22, and a white water feeding mechanism, a filtering mechanism, a filtrate collecting mechanism and a filler recovery mechanism are arranged inside the shell 22.

[0044] The filtering mechanism includes two rollers 1 arranged at intervals and rotatably connected to the housing 22. The output shaft of the driving device 21 fixedly connected to the housing 22 is connected to the rotating shaft of one of the rollers 1. The driving device 21 adopts a servo motor with a reduction mechanism.

[0045] An annular filter belt 2 is mounted on the two rotating rollers 1. The filter belt 2 is mesh-shaped, and the mesh size is selected according to the filler particle size in the white water. It is usually 50-200 mesh, and is made of metal mesh or polymer material. This ensures that fillers such as pulp fibers and titanium dioxide can be effectively intercepted while allowing clean water to pass through.

[0046] During filtration, the white water is sprayed on the top surface of the upper filter belt 2. In order to prevent the white water from flowing out from both sides of the filter belt 2 in the width direction, in this embodiment, Figure 7 as well as Figure 8As shown, the two sides of the filter belt 2 in the width direction are provided with U-shaped clamping edges 201, and the openings of the U-shaped clamping edges 201 of the upper and lower filter belts 2 are oppositely arranged. The U-shaped clamping edges 201 on the two sides and the planar area of the filter belt 2 form a concave cavity, which is convenient for storing more white water.

[0047] The two sides of the rotating roller 1 are provided with support discs 101, and the U-shaped clamping edges 201 at the ends of the filter belt 2 are sleeved outside the support discs 101.

[0048] The filtrate collecting mechanism includes two upper support protrusions 3, the two upper support protrusions 3 are inserted into the U-shaped clamping edges 201 on the two sides of the upper filter belt 2, and a plurality of upper connecting plates 4 are fixedly arranged in the middle of the two upper support protrusions 3.

[0049] The U-shaped clamping edges 201 on the two sides of the lower filter belt 2 are inserted into lower support protrusions 5, and a plurality of lower connecting plates 6 are fixedly arranged between the two lower support protrusions 5. The upper support protrusions 3 and the lower support protrusions 5 are fixedly connected, and together form a support frame for supporting the filter belt 2, so that the upper filter belt 2 forms a stable filter surface.

[0050] The white water feeding mechanism includes a feeding tank provided above the filter belt 2 and outside the shell 22, and provided with a liquid inlet pipe 14 and a protective cover 1501. The liquid inlet pipe 14 is connected with the feeding tank, and the feeding tank is connected with the white water discharge port of the paper machine. The paper machine white water generated by the paper machine is transported into the feeding tank. The feeding tank is provided with a liquid level sensor, which can monitor the amount of white water in the tank in real time, so as to avoid overflow of the white water.

[0051] In order to avoid the problem that the white water discharged from the liquid inlet pipe 14 directly impacts on the filter belt 2, causing splashing and collapse of the filter belt 2. In the embodiment, the white water feeding mechanism further includes a buffer inclined plate 15, and the bottom of the buffer inclined plate 15 is clamped in the inner side of the two U-shaped clamping edges 201 of the upper filter belt 2. The outer side of the buffer inclined plate 15 is provided with a protective cover 1501, and the outlet of the liquid inlet pipe 14 is arranged opposite to the buffer inclined plate 15. An expansion opening 1401 is arranged at the outlet of the liquid inlet pipe 14, so as to further reduce the flow rate and impact force. The white water hits the buffer inclined plate 15, and the splashing part is blocked by the protective cover 1501, and then flows into the filter belt 2 along the buffer inclined plate 15, without impacting on the filter belt 2.

[0052] The filtrate collecting mechanism includes a water collecting tank 8 located between the upper and lower filter belts 2, and the top surface of the water collecting tank 8 arranged with an upward opening is fixedly connected with the upper support protrusions 3 and the lower support protrusions 5. The opening of the water collecting tank 8 corresponds to the filter surface of the upper filter belt 2, and is used for receiving the clean water generated after the filter surface is filtered.

[0053] The sump 8 is fixedly connected to the housing 22, and the outlet of the drain pipe 801 of the sump 8 is passed to the outside of the housing 22. The end of the drain pipe 801 can be connected to the clean water recycling system of the paper machine or external water treatment equipment to achieve secondary utilization or qualified discharge of clean water.

[0054] In order to ensure that the U-shaped clamping edge 201 does not deform and maintains the U-shape during the rotation of the filter belt 2, in this embodiment, a clamping device is provided on the outside of the U-shaped clamping edge 201.

[0055] Depend on Figure 6 As shown, the clamping device includes a roller 11 and a U-shaped frame 12 arranged axially and vertically, and the circumferential surface of the roller 11 abuts against the outer side surface of the U-shaped clamping edge 201.

[0056] The opening of the U-shaped frame 12 is arranged outward, the vertical rod of the U-shaped frame 12 is coaxially arranged with the roller 11, the roller 11 is sleeved on the vertical rod of the U-shaped frame 12, and the end of the horizontal rod of the U-shaped frame 12 is provided with a limit plate 1201 and a spring seat 1202 in the middle.

[0057] The horizontal rod of the U-shaped frame 12 passes through the support plate 9, and the support plate 9 is fixedly connected to the water collecting tank 8 or the shell 22. A spring 13 is sleeved on the horizontal rod of the U-shaped frame 12, and the two ends of the spring 13 are respectively in contact with the spring seat 1202 and the support plate 9.

[0058] The circumferential surface of the roller 11 is provided with a plurality of protrusions 1101, which are made of elastic rubber. When the U-shaped edge 201 moves along its length, the roller 11 rotates without increasing the resistance of the U-shaped edge 201. However, if the U-shaped edge 201 tends to separate from the upper supporting convex plate 3 or the lower supporting convex plate 5, the protrusions 1101 that have been squeezed and deformed will increase the resistance to separation, preventing it from moving.

[0059] The upper and lower support plates 9 on the same side are fixedly connected by a connecting plate 10 in the middle, and the connecting plate 10 is connected to the water collecting tank 8 by bolts.

[0060] The filler recovery mechanism includes a scraper 16 disposed at the bottom of the filter belt 2, which abuts the downwardly disposed horizontal surface of the filter belt 2. A buffer ramp 15 is located above the sump 8, and the buffer ramp 15 and scraper 16 are respectively disposed at diagonal positions on the upper and lower sides of the filter belt 2.

[0061] The side wall of the shell 22 is provided with a discharge port 2201 arranged corresponding to the filler recovery mechanism, and the inside of the shell 22 is provided with a guide inclined plate 2202. The high point of the guide inclined plate 2202 is located below the scraper 16, and the low point is at the discharge port 2201.

[0062] The scraper 16 is used to clean the filter belt 2 and recycle the filtered filler, so the top of the scraper 16 needs to abut against the filter belt 2. In order to achieve this purpose, the abutment plate 7 is connected between the two lower support tabs 5, the bottom surface of the abutment plate 7 abuts against the top surface of the lower filter belt 2, and the scraper 16 abuts against the filter belt 2 in contact with the abutment plate 7.

[0063] In order to adjust the position of the top of the scraper 16, adjust the extrusion force between the scraper 16 and the filter belt 2, facilitate the adaptation to different types of fillers, and prevent the scraper 16 from being separated from the filter belt 2. In this embodiment, the scraper 16 is connected with an adjusting mechanism, and the adjusting mechanism controls the up-and-down movement of the scraper 16. Figure 10

[0064] The bottom of the vertically arranged scraper 16 is fixed with a horizontally arranged bottom plate 1601, and at least two vertically arranged slide rods 1602 are fixed below the bottom plate 1601.

[0065] The adjusting mechanism includes two inclined blocks 17 arranged oppositely with their inner surfaces inclined, a support table 18, and a screw rod 19, and the support table 18 is fixedly connected with the shell 22. The inclined blocks 17 are slidably connected with the support table 18, and at least two parallel arranged sliding grooves 1801 are arranged on the top surface of the support table 18, and the bottom of the inclined blocks 17 is provided with a sliding block slidably arranged in the sliding grooves 1801.

[0066] The slide rods 1602 pass through the through holes on the support table 18, the bottom of the bottom plate 1601 abuts against the inclined surfaces of the two inclined blocks 17, and the height of the inclined surfaces of the inclined blocks 17 is lower on the inner side and higher on the outer side. The screw rod 19 is provided with two thread parts with opposite rotation directions, the two thread parts are respectively threadedly connected with the threaded holes of the two inclined blocks 17, the end of the screw rod 19 passes through the shell 22 to the outside of the shell 22, and the hand wheel 20 is fixed on the end of the screw rod 19 outside the shell 22.

[0067] The above describes the embodiments of the present application in detail in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.​

Claims

1. A paper machine white water filtering device comprising a housing (22), characterized in that: the housing (22) is internally provided with a white water feeding mechanism, a filtering mechanism, a filtrate collecting mechanism and a filler recycling mechanism; the filtering mechanism comprises two rotating rollers (1) arranged at intervals and rotatably connected with the housing (22), the output shaft of a driving device (21) fixedly connected with the housing (22) is connected with the rotating shaft of one of the rotating rollers (1), and an annular filtering belt (2) is sleeved on the two rotating rollers (1); the white water feeding mechanism comprises a liquid inlet pipe (14) arranged above the filtering belt (2); the filtrate collecting mechanism comprises a water collecting tank (8) arranged between the upper and lower filtering belts (2), the water collecting tank (8) is fixedly connected with the housing (22), and the outlet of a water outlet pipe (801) of the water collecting tank (8) penetrates to the outside of the housing (22); the filler recycling mechanism comprises a scraper (16) arranged at the bottom of the filtering belt (2), and the scraper (16) abuts against the horizontal surface of the downwardly arranged filtering belt (2); and the side wall of the housing (22) is provided with a discharge port (2201) corresponding to the filler recycling mechanism.

2. The paper machine white water filtering device according to claim 1, characterized in that: the two sides of the filtering belt (2) in the width direction are provided with U-shaped clamping edges (201), and the openings of the U-shaped clamping edges (201) of the upper and lower filtering belts (2) are oppositely arranged; and the two sides of the rotating roller (1) in the axial direction are provided with support discs (101), and the U-shaped clamping edges (201) at the ends of the filtering belt (2) are sleeved outside the support discs (101).

3. The paper machine white water filtering device according to claim 2, characterized in that: the white water feeding mechanism comprises a buffer inclined plate (15), the buffer inclined plate (15) is arranged above the water collecting tank (8), and the bottom of the buffer inclined plate (15) is clamped inside the two U-shaped clamping edges (201) of the upper filtering belt (2); and the outlet of the liquid inlet pipe (14) is oppositely arranged with the buffer inclined plate (15).

4. The paper machine white water filtering device according to claim 3, characterized in that: the filtrate collecting mechanism comprises two upper support protruding plates (3), the two upper support protruding plates (3) are inserted into the interiors of the U-shaped clamping edges (201) on the two sides of the upper filtering belt (2), a plurality of upper connecting plates (4) are fixedly arranged in the middle of the two upper support protruding plates (3), and the top surface of the water collecting tank (8) with the opening arranged upward is fixedly connected with the upper support protruding plates (3).

5. The paper machine white water filtering device according to claim 4, characterized in that: lower support protruding plates (5) are inserted into the interiors of the U-shaped clamping edges (201) on the two sides of the lower filtering belt (2), the lower support protruding plates (5) are fixedly connected with the water collecting tank (8), an abutting plate (7) is connected between the two lower support protruding plates (5), the bottom surface of the abutting plate (7) abuts against the top surface of the lower filtering belt (2), and the scraper (16) abuts against the filtering belt (2) in contact with the abutting plate (7).

6. The paper machine white water filtering device according to claim 5, characterized in that: the buffer inclined plate (15) and the scraper (16) are respectively arranged at the diagonal positions on the upper and lower sides of the filtering belt (2). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 7. The paper machine white water filtering device according to claim 6, characterized in that: The scraper (16) is connected with an adjusting mechanism, which controls the up-and-down movement of the scraper (16).

8. The paper machine white water filtering device according to claim 7, characterized in that: The bottom of the vertically arranged scraper (16) is fixed with a horizontally arranged bottom plate (1601), and the bottom plate (1601) is fixed with at least two vertically arranged slide rods (1602) below; The adjusting mechanism comprises two inclined blocks (17) oppositely arranged with their inclined surfaces inward, a support table (18) and a screw rod (19), the support table (18) is fixedly connected with the shell (22), the inclined blocks (17) are slidably connected with the support table (18), the slide rods (1602) pass through the through holes in the support table (18), and the bottom of the bottom plate (1601) abuts against the inclined surfaces of the two inclined blocks (17). The screw rod (19) is provided with two thread parts with opposite rotation directions, the two thread parts are respectively threadedly connected with the threaded holes of the two inclined blocks (17), and the end of the screw rod (19) penetrates out of the shell (22).

9. The paper machine white water filtering device according to any one of claims 5 to 8, characterized in that: The outer side of the U-shaped clamping edge (201) is provided with a clamping device, the clamping device comprises an axially vertically arranged roller (11) and a U-shaped frame (12), the circumferential surface of the roller (11) abuts against the outer side of the U-shaped clamping edge (201); The opening of the U-shaped frame (12) is outwardly arranged, the vertical rod of the U-shaped frame (12) is coaxially arranged with the roller (11), the roller (11) is sleeved on the vertical rod of the U-shaped frame (12), the horizontal rod of the U-shaped frame (12) is provided with a limiting disc (1201) at the end and a spring seat (1202) in the middle; The horizontal rod of the U-shaped frame (12) passes through the support plate (9), the support plate (9) is fixedly connected with the water collecting tank (8) or the shell (22), the spring (13) is sleeved on the horizontal rod of the U-shaped frame (12), and the two ends of the spring (13) abut against the spring seat (1202) and the support plate (9) respectively.

10. The paper machine white water filtering device according to claim 9, characterized in that: The circumferential surface of the roller (11) is convexly provided with a plurality of convex points (1101).

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