CN219430388U - Paper pulp desanding device for kraft paper production - Google Patents

Abstract

The utility model relates to a pulp sand removing device for kraft paper production, which comprises a sand removing cylinder, a feed pipe communicated with the bottom of the sand removing cylinder and a discharge pipe communicated with the top of the sand removing cylinder; the sand removal cylinder is internally and rotatably connected with a first rotating shaft, the first rotating shaft is fixedly connected with a turbine and a first helical blade, the sand removal cylinder is internally and fixedly connected with a second rotating shaft, and the second rotating shaft is fixedly connected with a second helical blade; the inside rotation of inlet pipe is connected with the hollow shaft, the hollow shaft rear end is close to the sand removal section of thick bamboo, the hollow shaft front end is connected with the toper and leaks the sieve, the hollow shaft is provided with the runner in the inlet pipe inside, runner outer fringe distributes has a plurality of blades, the hollow shaft in be equipped with the third helical blade on the axle section of inlet pipe rear side the third helical blade is encircleed outward and is had the cylindric screen cloth, cylindric screen cloth tail end connection has the sand retention groove. The utility model aims to solve the problem that the sand removing effect of a primary sand removing device is not ideal when the primary sand removing device is used.

Description

Paper pulp desanding device for kraft paper production

Technical Field

The utility model relates to the technical field of papermaking equipment, in particular to a pulp sand removing device for kraft paper production.

Background

When paper making, the paper pulp is removed floater, suspended solid and heavy impurity, still need remove sand to the paper pulp, among the prior art, generally use the whirl desander to remove sand, the structure of whirl desander includes the sand removal section of thick bamboo, fixedly connected with fixed axle in the sand removal section of thick bamboo, fixedly connected with helical blade on the fixed axle, need send into the paper pulp from sand removal section of thick bamboo tangent line department high pressure to make the paper pulp flow along helical blade upwards, the paper pulp will flow from sand removal section of thick bamboo upper portion, the paper pulp that has sand will flow from sand removal section of thick bamboo bottom.

However, the existing pulp sand remover needs to realize efficient sand removal operation at a higher flow rate, but the flow rate of the pulp passing through the sand remover is not always higher, so that sand grains can not be completely removed, the sand removal effect is not ideal, and the pulp still contains more sand after sand removal, so that the paper making surface is rough, and the paper making quality is poor.

Therefore, we provide a kraft paper production with paper pulp sand removal device, increase sand removal device on the inlet pipe and the discharging pipe of sand removal section of thick bamboo, reach the effect of tertiary sand removal.

Disclosure of Invention

The utility model aims at: the utility model provides a kraft paper production is with paper pulp sand removal device adds second grade sand removal device in inlet pipe and discharging pipe to solve the problem that the sand removal effect is not ideal when the one-level sand removal device is used.

The utility model is realized by the following technical scheme: the pulp sand removing device for kraft paper production comprises a sand removing cylinder, a feed pipe communicated with the bottom of the sand removing cylinder and a discharge pipe communicated with the top of the sand removing cylinder;

the sand removing cylinder is internally and rotatably connected with a first rotating shaft, the first rotating shaft is fixedly connected with a turbine and a first helical blade, the sand removing cylinder is internally and fixedly connected with a second rotating shaft, and the second rotating shaft is fixedly connected with a second helical blade;

the inside rotation of inlet pipe is connected with the hollow shaft, the hollow shaft rear end is close to the sand removal section of thick bamboo, the hollow shaft front end is connected with the toper and leaks the sieve, the hollow shaft is provided with the runner in the inlet pipe inside, runner outer fringe distributes has a plurality of blades, and is a plurality of the inner edge of blade is fixed through big back big front and small toper leaks the sieve on the hollow shaft, the hollow shaft in be equipped with the third helical blade on the axle section of inlet pipe rear side the third helical blade is encircleed outward and is had cylindric screen cloth, cylindric screen cloth tail end connection has stagnating sand groove.

Further, the top fixedly connected with honeycomb duct of discharging pipe, the honeycomb duct is the structure of falling U, the right-hand member inside of honeycomb duct is provided with the filter, and the honeycomb duct is kept away from discharging pipe one end fixed mounting and is had the thick liquid groove of collection.

Further, the inlet pipe rotates to be connected in the sand removal section of thick bamboo, and the inlet pipe intercommunication has the impact pipe, and the impact pipe export is towards the turbine, and the turbine is located the impact pipe top, is provided with the adjusting device who is used for controlling inlet pipe turned angle on the sand removal section of thick bamboo.

Further, the bottom welding of the sand removal section of thick bamboo has the sand discharge mouth, the bottom fixedly connected with sand collection room of sand discharge mouth, the bottom fixedly connected with sand outlet of sand collection room.

Further, the front end of the hollow shaft extends out of the feeding pipe and is provided with a motor for driving the hollow shaft to rotate.

Further, the inlet pipe rear end is connected with the arc baffle, the arc baffle other end is connected to the degritting section of thick bamboo, the sand hole has been seted up to arc baffle and inlet pipe connection one end.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the spiral sand remover is arranged in the feed pipe, and pretreatment is carried out before paper pulp enters the sand removing cylinder, so that part of sand is screened out by the spiral blade and the screen cylinder before the paper pulp enters the sand removing cylinder, thus the sand content in the paper pulp is reduced, and the paper pulp can be rapidly removed after the paper pulp enters the sand removing cylinder; furthermore, the tail end of the discharging pipe is connected with the flow guide pipe, the filter plate and the pulp collecting tank, so that the pulp with sand not removed completely can be further filtered.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

FIG. 2 is a schematic view of the structure of a feed pipe according to the present utility model;

fig. 3 is a schematic view of the external structure of the present utility model.

Description of the reference numerals: 1-sand removing cylinder, 2-feeding pipe, 3-discharging pipe, 4-flow guiding pipe, 5-filter plate, 6-slurry collecting tank, 7-impact pipe, 8-sand discharging port, 9-sand collecting chamber, 10-sand outlet port,

11-a first rotating shaft, 12-a second rotating shaft, 21-a hollow shaft, 22-a cylindrical screen, 23-a sand retention groove, 24-a motor, 25-an arc-shaped baffle plate,

111-turbine, 112-first helical blade, 121-second helical blade, 211-conical screen, 212-runner, 213-third helical blade.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides a pulp sand removing device for kraft paper production, which is shown in figures 1-3, and comprises a sand removing cylinder 1, a feed pipe 2 communicated with the bottom of the sand removing cylinder 1 and a discharge pipe 3 communicated with the top of the sand removing cylinder 1; the sand removing cylinder 1 is rotationally connected with a first rotating shaft 11, the first rotating shaft 11 is fixedly connected with a turbine 111 and a first helical blade 112, a second rotating shaft 12 is fixedly connected in the sand removing cylinder 1, and a second helical blade 121 is fixedly connected on the second rotating shaft 12; the inside rotation of inlet pipe 2 is connected with hollow shaft 21, and hollow shaft 21 rear end is close to except that sand cylinder 1, and hollow shaft 21 front end is connected with toper hourglass sieve 211, and hollow shaft 21 is provided with runner 212 in inlet pipe 2 inside, and runner 212 outer fringe distributes has a plurality of blades, and the inner edge of a plurality of blades is fixed through big front and small back toper hourglass sieve 211 on hollow shaft 21, hollow shaft 21 in be equipped with third helical blade 213 on the axle section of inlet pipe 2 rear side, encircle outside third helical blade 213 and have cylindric screen cloth 22, cylindric screen cloth 22 tail end connection has stagnating sand groove 23.

The top fixedly connected with honeycomb duct 4 of discharging pipe 3, honeycomb duct 4 are the structure of falling U, and the right-hand member inside of honeycomb duct 4 is provided with filter 5, and honeycomb duct 4 keeps away from discharging pipe 3 one end fixed mounting and has album thick liquid groove 6.

The inlet pipe 2 rotates to be connected in the degritting section of thick bamboo 1, and inlet pipe 2 intercommunication has impact tube 7, and impact tube 7 export is towards turbine 111, and turbine 111 is located impact tube 7 top, is provided with the adjusting device who is used for controlling inlet pipe 2 rotation angle on the degritting section of thick bamboo 1.

The bottom of the sand removal cylinder 1 is welded with a sand discharge port 8, the bottom of the sand discharge port 8 is fixedly connected with a sand collecting chamber 9, and the bottom of the sand collecting chamber 9 is fixedly connected with a sand outlet 10.

The front end of the hollow shaft 21 extends out of the feeding pipe 2, and a motor 24 for driving the hollow shaft 21 to rotate is arranged outside the feeding pipe.

The inlet pipe 2 rear end is connected with arc baffle 25, the arc baffle 25 other end is connected to sand removal section of thick bamboo 1, the sand hole has been seted up to arc baffle 25 and inlet pipe 2 one end of being connected. The baffle 25 is capable of changing the flow direction of the pulp flowing out from the feed pipe 2, and the pulp flows to the sand removing cylinder 1 through the baffle 25, and at the same time, a part of the sand flowing out together with the pulp can fall from the sand passage hole to the sand discharge port 8.

The utility model can explain its functional principle by the following modes of operation: the pulp enters the feed pipe 2 and passes through the conical screen 211, the conical screen 211 is fixed on the hollow shaft 21, and the conical screen 211 can screen the raw pulp and can also convey the raw pulp which is not screened backwards; under the rotation of the third helical blades 213, the sand-water separation is carried out by the cylindrical screen 22, the sand retention groove 23 is connected to the tail end of the cylindrical screen 22, and the thrown sand enters the sand retention groove 23 and flows into the sand collection chamber 9; the pulp after the first-stage treatment flows out from the feeding pipe 2 and is sprayed into the sand removing cylinder 1 from the impact pipe 7, the pulp is sprayed onto the turbine 111, the turbine 111 drives the first rotating shaft 11 to rotate, the first rotating shaft 11 drives the first spiral blade 112 to rotate, the first spiral blade 112 increases stirring action on the pulp on one hand and also serves as assisting force for rotating the pulp, so that the pulp rotates, flows onto the second spiral blade 121 along the first spiral blade 112, flows into the discharging pipe 3 along the second spiral blade 121 through inertia of the pulp, strong rotating motion is generated by the pulp in the sand removing cylinder 1 due to different density of sand water, the pulp with low density rises due to different stress under the action of centrifugal force, centripetal buoyancy and fluid drag force, and is discharged from the discharging pipe 3, and the sand with high density is discharged into the sand collecting chamber 9 from the sand discharging port 8, so that the purpose of sand removal is achieved. At this time, the pulp subjected to the secondary treatment reaches the discharge pipe 3, flows through the filter plate 5 in the guide pipe 4, and flows to the pulp collecting tank 6 after the primary filtration.

The foregoing description is only specific embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the present utility model and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present utility model.

Claims (6)

1. Pulp sand removal device is used in kraft paper production, its characterized in that: comprises a sand removal cylinder (1), a feed pipe (2) communicated with the bottom of the sand removal cylinder (1) and a discharge pipe (3) communicated with the top of the sand removal cylinder (1);

the sand removal cylinder (1) is rotationally connected with a first rotating shaft (11), the first rotating shaft (11) is fixedly connected with a turbine (111) and a first helical blade (112), the sand removal cylinder (1) is internally fixedly connected with a second rotating shaft (12), and the second rotating shaft (12) is fixedly connected with a second helical blade (121);

the inside rotation of inlet pipe (2) is connected with hollow shaft (21), hollow shaft (21) rear end is close to sand removal section of thick bamboo (1), hollow shaft (21) front end is connected with toper hourglass sieve (211), hollow shaft (21) are provided with runner (212) inside inlet pipe (2), runner (212) outer fringe distributes has a plurality of blades, and a plurality of the inner edge of blade is fixed on hollow shaft (21) through big front and back little toper hourglass sieve (211), hollow shaft (21) in be equipped with third helical blade (213) on the axle section of inlet pipe (2) rear side the outside of third helical blade (213) is around there is cylindric screen cloth (22), cylindric screen cloth (22) tail end connection has sand-retaining groove (23).

2. The kraft paper production pulp sand removing apparatus according to claim 1, wherein: the top fixedly connected with honeycomb duct (4) of discharging pipe (3), honeycomb duct (4) are the structure of falling U, the right-hand member inside of honeycomb duct (4) is provided with filter (5), and honeycomb duct (4) are kept away from discharging pipe (3) one end fixed mounting and are had album thick liquid groove (6).

3. The kraft paper production pulp sand removing apparatus according to claim 1, wherein: the feeding pipe (2) is rotationally connected in the sand removal cylinder (1), the feeding pipe (2) is communicated with an impact pipe (7), an outlet of the impact pipe (7) faces the turbine (111), the turbine (111) is located above the impact pipe (7), and an adjusting device for controlling the rotation angle of the feeding pipe (2) is arranged on the sand removal cylinder (1).

4. The kraft paper production pulp sand removing apparatus according to claim 1, wherein: the bottom welding of sand removal section of thick bamboo (1) has sand discharge mouth (8), the bottom fixedly connected with sand collection room (9) of sand discharge mouth (8), the bottom fixedly connected with sand outlet (10) of sand collection room (9).

5. The kraft paper production pulp sand removing apparatus according to claim 1, wherein: the front end of the hollow shaft (21) extends out of the feeding pipe (2), and a motor (24) for driving the hollow shaft (21) to rotate is arranged outside the feeding pipe.

6. The kraft paper production pulp sand removing apparatus according to claim 1, wherein: the sand removing device is characterized in that the rear end of the feeding pipe (2) is connected with an arc-shaped baffle plate (25), the other end of the arc-shaped baffle plate (25) is connected to the sand removing cylinder (1), and a sand through hole is formed in one end, connected with the feeding pipe (2), of the arc-shaped baffle plate (25).