Multi-disc filter

Abstract

The utility model relates to the technical field of papermaking equipment, in particular to a multi-disc filter which comprises a tank body and a hood, a rotating shaft is rotationally arranged in the tank body, extends out of the tank body and is provided with a main driving mechanism in a transmission manner, the tank body is communicated with a slurry inlet, a distribution valve and a liquid level opening, the distribution valve is communicated with a clear filtrate outlet, a turbid filtrate outlet and an ultra-clear filtrate outlet, and a slurry stripping pipe opening, a slurry flushing pipe opening and a net washing pipe opening are formed in the side wall of the hood; disc plates coaxial with the rotating shaft are arranged on the rotating shaft in parallel in the axial direction, outer filter plates are arranged outside the disc plates, inner filter plates and partition plates are concentrically arranged between the disc plates, and a runner located on one side of the distribution valve is formed in the disc plates between the inner filter plates and the partition plates in a penetrating mode. The multi-disc filter disclosed by the utility model can be used for filtering slurry with different fiber lengths and is high in filtering efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to papermaking equipment technical field, concretely to a kind of multi-disc filter. BACKGROUND

[0002] Multi-disc filter is widely used in pulp and papermaking, environmental protection sewage treatment, mine tailings dehydration and other fields of solid-liquid separation equipment, mainly used for low concentration pulp concentration, improve solid content and recycle fiber or solid particles.

[0003] Before the development of multi-disc filter, traditional concentration technology is to use gravity sedimentation tank or single circular net thickener, which has large floor area, low efficiency and high energy consumption;Multi-disc structure is improved far from the top, and the treatment capacity and concentration efficiency are significantly improved by the series operation of multiple filter discs.

[0004] The working principle and working process of multi-disc filter are as follows: in the adsorption stage, the rotating outer filter plate is immersed in the pulp tank, and the fiber or solid particles form a filter layer on the surface of the outer filter plate;In the dehydration stage, after the outer filter plate leaves the liquid surface, the water is discharged under the action of gravity or vacuum, and the solid material adheres to the outer filter plate;In the unloading stage, the scraper or high-pressure spray device peels off the concentrated material on the outer filter plate and collects it into the discharge port;The outer filter plate is washed by spraying water to prevent clogging and maintain long-term stable operation.

[0005] At present, the conventional multi-disc filter adopts single-layer rotating outer filter plate, and the filter hole diameter of the rotating outer filter plate is constant;Therefore, when concentrating pulp containing different fiber lengths, the filter hole diameter is too small, which easily blocks the filter hole;The filter hole diameter is too large, which easily separates the available short fibers in the pulp, resulting in low filtration efficiency of the pulp. INVENTION CONTENTS

[0006] In order to solve the technical problems in the background art, the utility model provides a kind of multi-disc filter, which can filter pulp with different fiber lengths, and has high filtration efficiency.

[0007] The technical solution adopted by the utility model is as follows:

[0008] A kind of multi-disc filter, comprising: tank body and cover set on the tank body Machine cover, rotating shaft is rotationally arranged in tank body, rotating shaft extends to the outside of tank body, and main drive mechanism is transmissionally arranged, tank body side wall is connected and is provided with pulp inlet, distribution valve, liquid level, distribution valve is connected and is provided with clear filtrate outlet, turbid filtrate outlet, super-clean filtrate outlet, machine cover side wall is provided with stripping pulp pipe, flushing pulp pipe, washing screen pipe.

[0009] A plurality of disc plates coaxial with the rotating shaft are arranged axially and side by side on the rotating shaft, and an outer filter plate is arranged outside the disc plates.

[0010] Further, main shaft sealing bearings are arranged at both ends of the rotating shaft and sealingly connected with the groove body.

[0011] The pulp inlet is arranged on the side wall of the groove body on the radial side of the rotating shaft, and a plurality of pulp inlets are arranged axially and side by side along the rotating shaft.

[0012] Further, the outer filter plate is arranged in a cylindrical shape and fixedly connected coaxially with the outer periphery of the disc plate.

[0013] Filter holes are arranged through the outer filter plate and the inner filter plate, respectively, and the diameter of the filter holes on the outer filter plate is larger than that of the filter holes on the inner filter plate.

[0014] Further, the pulp stripping pipe, the pulp flushing pipe and the screen washing pipe are arranged on the side wall of the machine cover above the distribution valve.

[0015] Further, the pulp stripping pipe and the pulp flushing pipe are arranged on the side close to the pulp inlet.

[0016] The screen washing pipe is arranged on the side away from the pulp inlet.

[0017] Further, in the machine cover:

[0018] A pulp stripping branch pipe is arranged through the pulp stripping pipe axially and side by side, and the end of the pulp stripping branch pipe is arranged at the outer filter plate and inclined towards the side close to the pulp inlet.

[0019] A pulp flushing branch pipe is arranged through the pulp flushing pipe, and a screen washing branch pipe is arranged through the screen washing pipe axially and side by side in the machine cover, the screen washing branch pipe is arranged on the side of the disc plate away from the pulp inlet, the end of the screen washing branch pipe is arranged at the inner filter plate and inclined towards the side away from the pulp inlet, and a plurality of cleaning nozzles are arranged through the screen washing branch pipe axially and radially and in a radial pattern.

[0020] Further, outside the machine cover:

[0021] The screen washing pipe is connected and driven by a rotary joint and a swing mechanism.

[0022] Further, a discharge bin is arranged at the lower end of the groove body, the upper end of the discharge bin is open and extends upwards into the machine cover, the end of the screen washing branch pipe extends into the opening at the upper end of the discharge bin, a plurality of dilution water inlets are arranged through the side wall of the discharge bin axially and side by side, an auger is arranged rotatably in the discharge bin, the rotating shafts at both ends of the auger extend out of the discharge bin and are respectively provided with a secondary shaft seal and a secondary bearing seat sealingly connected with the discharge bin, and a pulp outlet is arranged through the lower end of the discharge bin.

[0023] Further, the upper end opening of the discharge bin is arranged on both sides of the disc plate in the outer filter plate, and the upper end opening of the discharge bin is higher than the distribution valve.

[0024] The multi-disc filter has the advantages that:

[0025] 1. The two-layer outer filter plate and inner filter plate, and the filter holes with different hole diameters on the outer filter plate and inner filter plate are arranged, so that the filtering capacity of slurry is improved.

[0026] 2. The outer filter plate is cleaned through the stripping branch pipe, and the inner filter plate is cleaned through the screen cleaning branch pipe, so that the filtering efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a front view schematic diagram provided by the utility model example;

[0028] Figure 2 is a side view schematic diagram provided by the utility model example;

[0029] Figure 3 is a top view schematic diagram provided by the utility model example;

[0030] Figure 4 is a disc assembly side view schematic diagram provided by the utility model example.

[0031] In the drawings:

[0032] 10, groove body, 11, rotating shaft, 12, main shaft sealing bearing, 13, main drive mechanism, 14, pulp inlet, 15, distribution valve,

[0033] 16, clear filtrate outlet, 17, turbid filtrate outlet, 18, super-clean filtrate outlet, 19, liquid level port,

[0034] 110, disc plate, 111, outer filter plate, 112, inner filter plate, 113, partition plate, 114, flow channel,

[0035] 20, machine cover, 21, stripping pipe port, 22, flushing pipe port, 23, screen cleaning pipe port, 24, oscillating mechanism,

[0036] 210, stripping branch pipe, 220, flushing branch pipe, 230, screen cleaning branch pipe,

[0037] 30, discharge bin, 31, dilution water port, 32, auxiliary shaft seal, 33, auxiliary bearing seat, 34, auger, 35, pulp outlet,

[0038] A, rotating direction of rotating shaft, B, rotating direction of auger. DETAILED DESCRIPTION

[0039] In order to more clearly and explicitly illustrate the specific implementation purposes and implementation manners of the utility model, the technical scheme of the utility model will be completely described below, and the described embodiments are part of the embodiments of the utility model, instead of all the embodiments. On the premise of not making creative labor, all other embodiments based on the described embodiments of the utility model belong to the protection scope of the utility model.

[0040] The utility model discloses a multi-disc filter, like Figure 1 、 Figure 2 、 Figure 3 The utility model discloses a multi-disc filter, like

[0041] The utility model discloses a multi-disc filter, like

[0042] The utility model discloses a multi-disc filter, like Figure 1 、 Figure 2 、 Figure 3 The utility model discloses a multi-disc filter, like

[0043] The utility model discloses a multi-disc filter, like Figure 4 、 、

[0044] The utility model discloses a multi-disc filter, like Figure 2As shown, a stripping pipe port 21, a slurry flushing pipe port 22, and a network washing pipe port 23 are provided on the side wall of the hood 20 above the distribution valve 15. The stripping pipe port 21 and the slurry flushing pipe port 22 are arranged on the side close to the slurry inlet 14. A stripping branch pipe 210 is connected in parallel along the axial direction on the stripping pipe port 21 in the hood 20. The end of the stripping branch pipe 210 is arranged at the outer filter plate 111 and is inclined toward the side close to the slurry inlet 14. A slurry flushing branch pipe 220 is connected on the slurry flushing pipe port 22 in the hood 20. The network washing pipe port 23 It is arranged on the side away from the pulp inlet 14, and the net washing pipe mouth 23 in the machine cover 20 is axially connected and connected with the net washing branch pipe 230 in parallel. The net washing branch pipe 230 is arranged on the side of the disc plate 110 away from the pulp inlet 14. The end of the net washing branch pipe 230 is arranged at the inner filter plate 112 and is inclined to the side away from the pulp inlet 14. The net washing branch pipe 230 is axially and radially connected with a radial cleaning nozzle group. The net washing pipe mouth 23 outside the machine cover 20 is connected through a rotary joint and is driven by a swing mechanism 24.

[0045] like Figure 2 、 Figure 3 As shown, a discharge bin 30 is provided at the lower end of the trough body 10, and the upper end opening of the discharge bin 30 extends upward into the machine cover 20 and is arranged on both sides of the disc plate 110 in the outer filter plate 111. The upper end opening of the discharge bin 30 is higher than the distribution valve 15, and the end of the screen washing branch pipe 230 extends to the upper end opening of the discharge bin 30. A dilution water port 31 is axially connected and arranged in parallel on the side wall of the discharge bin 30. An auger 34 is rotatably arranged in the discharge bin 30, and the rotating shafts at both ends of the auger 34 extend to the outside of the discharge bin 30, and are respectively provided with a secondary shaft seal 32 and a secondary bearing seat 33 sealed and connected to the discharge bin 30. The auger 34 is provided with an auger drive motor through the gearbox, and drives the auger 34 to rotate along the auger rotation direction B. The lower end of the discharge bin 30 is connected with a slurry outlet 35.

[0046] In summary, the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the contents of the specification. All equivalent changes and modifications of the shape, structure, characteristics and spirit described in the scope of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A multi-disc filter comprising: The groove body (10) and the cover (20) are arranged on the groove body (10), the rotary shaft (11) is arranged in the groove body (10) and extends to the outside of the groove body (10), the main drive mechanism (13) is arranged in transmission, the inlet (14), the distribution valve (15) and the liquid level port (19) are arranged on the side wall of the groove body (10), the clear filtrate outlet (16), the turbid filtrate outlet (17) and the super-clear filtrate outlet (18) are arranged on the distribution valve (15), the stripping pipe (21), the flushing pipe (22) and the screen washing pipe (23) are arranged on the side wall of the cover (20), characterized in that: A plurality of disc plates (110) coaxial with the rotary shaft (11) are arranged on the rotary shaft (11) in parallel along the axial direction, the outer filter plate (111) is arranged outside the disc plate (110), the annular inner filter plate (112) and the partition plate (113) are arranged concentrically from outside to inside between the disc plates (110), the flow channel (114) is arranged through the disc plate (110) between the inner filter plate (112) and the partition plate (113), and the flow channel (114) is arranged on one side of the distribution valve (15).

2. The multi-disc filter machine according to claim 1, characterized in that: The main shaft sealing bearing (12) is arranged in sealing connection with the groove body (10) at both ends of the rotary shaft (11); The inlet (14) is arranged on the side wall of the groove body (10) on the radial side of the rotary shaft (11) and is arranged in parallel along the axial direction of the rotary shaft (11).

3. The multi-disc filter machine according to claim 1, characterized in that: The outer filter plate (111) is arranged in a cylindrical shape and is fixedly connected coaxially with the outer periphery of the disc plate (110); The filter holes are arranged through the outer filter plate (111) and the inner filter plate (112) respectively, and the diameter of the filter holes on the outer filter plate (111) is greater than that of the filter holes on the inner filter plate (112).

4. The multi-disc filter machine according to claim 3, characterized in that: The stripping pipe (21), the flushing pipe (22) and the screen washing pipe (23) are arranged on the side wall of the cover (20) above the distribution valve (15).

5. The multi-disc filter machine according to claim 4, characterized in that: The stripping pipe (21) and the flushing pipe (22) are arranged on the side close to the inlet (14); The screen washing pipe (23) is arranged on the side away from the inlet (14).

6. The multi-disc filter machine according to claim 5, characterized in that: The cover (20) is arranged in: The stripping branch pipe (210) is arranged in parallel along the axial direction and is connected to the stripping pipe (21), the stripping branch pipe (210) is arranged at the outer filter plate (111) at the end and is inclined to the side close to the inlet (14). The flushing pipe orifice (22) is communicated with a flushing branch pipe (220), the washing screen pipe orifice (23) in the machine cover (20) is communicated with a washing screen branch pipe (230) in parallel along the axial direction, the washing screen branch pipe (230) is arranged on the side of the disc plate (110) far from the pulp inlet (14), the end of the washing screen branch pipe (230) is arranged at the inner filter plate (112) and is inclined to the side far from the pulp inlet (14), and the washing screen branch pipe (230) is communicated with a cleaning nozzle group in a radial manner along the axial direction.

7. The multi-disc filter according to claim 5, characterized in that: The machine cover (20) is provided with a rotating joint and a swing mechanism (24) on the washing screen pipe orifice (23).

8. The multi-disc filter according to any one of claims 1-7, characterized in that: The lower end of the tank (10) is provided with a discharge bin (30), the upper end of the discharge bin (30) is communicated with the machine cover (20), the end of the washing screen branch pipe (230) is extended into the upper end opening of the discharge bin (30), the sidewall of the discharge bin (30) is communicated with a dilution water inlet (31) in parallel along the axial direction, the discharge bin (30) is rotatably provided with an auger (34), the two ends of the auger (34) are extended out of the discharge bin (30) and are respectively provided with a secondary shaft seal (32) and a secondary bearing seat (33) in sealing connection with the discharge bin (30), and the lower end of the discharge bin (30) is communicated with a pulp outlet (35).

9. The multi-disc filter according to claim 8, characterized in that: The upper end opening of the discharge bin (30) is arranged on both sides of the disc plate (110) in the outer filter plate (111), and the upper end opening of the discharge bin (30) is arranged higher than the distribution valve (15). ​

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