CN212077480U

CN212077480U - Down-flow type pressure screen shell with enhanced slag discharge capacity

Info

Publication number: CN212077480U
Application number: CN202020701646.3U
Authority: CN
Inventors: 刘建涛; 刘建坡; 赵永超
Original assignee: Zhengzhou Leizhan Technology Paper Machinery Co Ltd
Current assignee: Zhengzhou Leizhan Technology Paper Machinery Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-12-04
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses a strengthen falling STREAMING pressurized screen casing of sediment ability, the pressurized screen casing mainly comprises upper portion casing and lower part casing butt joint, and the screen cylinder of falling STREAMING pressurized screen is installed on the casing of upper portion, and the lower part casing is big-end-up's back taper structure, and the sediment district is arranged as falling STREAMING pressurized screen to the lower part casing, is equipped with wash pipe and tail stock delivery pipe on the casing of lower part, and wash pipe and tail stock delivery pipe all are tangent with the lower part casing. The utility model discloses with the casing in row's sediment district of pressurized screen bottom, change into big-end-up's back taper structure by ordinary cylindrical casing, arrange the space in sediment district through the shrink, add the sparge water along the tangential direction of circular cone casing simultaneously, dilute the thick liquids in sediment district to assist and erode, make the sediment speed of arranging of tail thick liquid accelerate, can reduce tail thick liquid concentration, improve the tail thick liquid emission efficiency who falls the class sieve.

Description

Down-flow type pressure screen shell with enhanced slag discharge capacity

Technical Field

The utility model relates to a papermaking equipment technical field especially relates to a strengthen falling class pressurized screen casing of sediment ability.

Background

In the paper making process, screening and purifying of paper pulp is an important process for improving the quality of finished paper. Two-stage or even three-stage screening processes are often required to screen out most of the impurities in the pulp. In the present paper making equipment, the pressure screen is the main equipment for carrying out the process, and the rotor is the core component of the pressure screen.

The rotor structure of the pressure screen is usually that a plurality of regularly arranged rotary wings are arranged on the surface of a cylinder or a cantilever rod. The positive pressure and the negative pressure are formed on the surface of the rotor blade in sequence in the process of high-speed rotation. When the rotor blade generates positive pressure, the pulp is pressed to the screen cylinder to force the qualified fibers and water to smoothly pass through the screen holes or screen gaps; when the rotary wing panel generates negative pressure, water on the other side of the screen cylinder is sucked to pass through the screen holes or the screen slits, and the effect of cleaning the screen holes or the screen slits is achieved.

The pressure sieves commonly used in the market at present are divided into an upflow sieve with bottom pulp inlet and a downflow sieve with upper pulp inlet according to different pulp inlet positions, wherein the downflow sieve has a simple structure, is reliable to use and has a wider application range. However, since the screening process of the downflow screen is performed from top to bottom, the concentration of the tail pulp is gradually increased along with the precipitation of water and qualified fibers in the pulp during the screening process, which is the thickening phenomenon that is the biggest problem affecting the use of the downflow screen.

The thickening phenomenon easily causes the tail slurry discharge blockage of the falling sieve, and influences the normal use of equipment.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the problem among the prior art, provide a strengthen falling stream formula pressurized screen casing of sediment ability, can reduce the tail thick liquid concentration, improve the tail thick liquid emission efficiency of falling stream sieve.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a strengthen falling STREAMING pressurized screen casing of sediment ability, the pressurized screen casing mainly comprises upper portion casing and lower part casing butt joint, and falling STREAMING pressurized screen's screen cylinder is installed on the upper portion casing, and the lower part casing is big-end-up's back taper structure, and the sediment district is arranged as falling STREAMING pressurized screen to the lower part casing, is equipped with wash pipe and tail-stock delivery pipe on the casing of lower part, and wash pipe and tail-stock delivery pipe all are tangent with the casing of lower part.

The flushing water pipe and the tail slurry discharge pipe are in the same horizontal position.

The flushing water pipe and the tail slurry discharge pipe are positioned on the same side of the lower shell.

The diameter of the flushing water pipe is smaller than that of the tail slurry discharge pipe.

The upper shell is provided with a pulp inlet pipe above the screen cylinder, and the upper shell is provided with a pulp outlet pipe corresponding to the bottom of the screen cylinder.

And a screen cylinder fixing ring is arranged in the upper shell, and a screen cylinder of the down-flow type pressure screen is arranged on the screen cylinder fixing ring.

And a transmission fixing flange is arranged at the bottom of the lower shell.

The pressure screen housing is entirely supported by legs.

The utility model has the advantages that:

the utility model discloses with the casing in row's sediment district of pressurized screen bottom, change into big-end-up's back taper structure by ordinary cylindrical casing, arrange the space in sediment district through the shrink, add the sparge water along the tangential direction of conical shell simultaneously, dilute the thick liquids in sediment district to assist and erode, make the sediment speed of arranging of tail thick liquid accelerate.

The utility model discloses start from diluting tail stock concentration and increasing tail stock velocity of flow two aspects, solved the problem that influences down flow formula pressurized screen and arrange the sediment difficulty to simple structure is reliable.

Drawings

FIG. 1 is a schematic structural view of a down flow pressure screen housing of the present invention;

FIG. 2 is a top view of the downflow pressure screen housing of the present invention;

fig. 3 is a working principle diagram of the downflow type pressure screen casing of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1 to 3, the downflow type pressure screen shell for enhancing slag discharge capacity of the embodiment is mainly formed by butting an upper shell 3 and a lower shell 4. The pressure screen housing is entirely supported by legs 6.

Be equipped with the solid fixed ring of screen cylinder 2 in the casing of upper portion, the screen cylinder of downflow formula pressure screen is installed at the solid fixed ring of screen cylinder 2, is to advance thick liquid pipe 1 on the solid fixed ring of screen cylinder 2's upper portion, and its lower part is out thick liquid pipe 8 to make into thick liquid pipe 1 and correspond in the top department of screen cylinder 12, go out thick liquid pipe 8 and correspond in the bottom department of screen cylinder 12. The lower shell 4 is an inverted cone structure with a large upper part and a small lower part, the lower shell 4 is used as a slag discharge area of the down-flow type pressure screen, a washing water pipe 7 and a tail slurry discharge pipe 9 are arranged on the lower shell 4, and the washing water pipe 7 and the tail slurry discharge pipe 9 are both tangent to the lower shell 4.

In this embodiment, the wash water pipe 7 and the tailings discharge pipe 9 are in the same horizontal position, and the wash water pipe 7 and the tailings discharge pipe 9 are on the same side of the lower housing 4.

In this embodiment, the bottom of the lower housing 4 is provided with a transmission fixing flange 5, which facilitates installation of a transmission component 13 of the downflow type pressure screen.

As shown in fig. 3, during operation, pulp enters the interior of the downflow type pressure screen from the pulp inlet pipe 1, the rotor 11 is driven by the transmission part 13 to rotate at a high speed, and qualified fibers and water in the pulp pass through the screen cylinder 12 and are discharged through the pulp outlet pipe 8. As the pulp moves downwards, the pulp concentration inside the screen cylinder 12 increases and its flow rate decreases. When the pulp moves to the slag discharge area, the lower shell 4 of the slag discharge area is a reverse cone structure with a large upper part and a small lower part, the section of the lower shell is continuously reduced, and the pulp inlet pressure at the pulp inlet pipe 1 is unchanged, so the flow speed of the pulp is improved.

At the same time, as shown in fig. 2, a large amount of water enters the lower shell 4 from the washing water pipe 7, and impacts the tailings along the tangential direction of the cone, so that the tailings obtain an acceleration as shown in the figure, and the tailings are driven to be discharged along a tailings discharging pipe 9.

In order to improve the flushing effect and the slag discharge capacity, the diameter of the flushing water pipe 7 is smaller than that of the tail slurry discharge pipe 9.

The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention may be modified or substituted with equivalents without departing from the spirit and scope of the invention, which should be construed as being limited only by the claims.

In the description of the present invention, it should be understood that the terms "front", "back", "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the description refers must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.

Claims

1. The utility model provides a strengthen falling class pressure screen shell of sediment ability which characterized in that: the pressure screen shell is mainly formed by butt joint of an upper shell and a lower shell, a screen cylinder of the down-flow type pressure screen is installed on the upper shell, the lower shell is of an inverted cone structure with a large upper part and a small lower part, the lower shell is used as a slag discharge area of the down-flow type pressure screen, a flushing water pipe and a tail slurry discharge pipe are arranged on the lower shell, and the flushing water pipe and the tail slurry discharge pipe are tangent to the lower shell.

2. The deslagging-enhanced downflow pressure screen casing of claim 1, wherein: the flushing water pipe and the tail slurry discharge pipe are in the same horizontal position.

3. The deslagging-enhanced downflow pressure screen casing of claim 1, wherein: the flushing water pipe and the tail slurry discharge pipe are positioned on the same side of the lower shell.

4. The deslagging-enhanced downflow pressure screen casing of claim 1, wherein: the diameter of the flushing water pipe is smaller than that of the tail slurry discharge pipe.

5. The enhanced slagging capacity down flow pressure screen casing according to any of claims 1 to 4, wherein: the upper shell is provided with a pulp inlet pipe above the screen cylinder, and the upper shell is provided with a pulp outlet pipe corresponding to the bottom of the screen cylinder.

6. The enhanced slagging capacity down flow pressure screen casing according to any of claims 1 to 4, wherein: and a screen cylinder fixing ring is arranged in the upper shell, and a screen cylinder of the down-flow type pressure screen is arranged on the screen cylinder fixing ring.

7. The enhanced slagging capacity down flow pressure screen casing according to any of claims 1 to 4, wherein: and a transmission fixing flange is arranged at the bottom of the lower shell.

8. The enhanced slagging capacity down flow pressure screen casing according to any of claims 1 to 4, wherein: the pressure screen housing is entirely supported by legs.