CN210712352U

CN210712352U - Steady voltage cloth thick liquid ware

Info

Publication number: CN210712352U
Application number: CN201921707751.1U
Authority: CN
Inventors: 李安东; 李文海; 王东明; 李建峰; 王树发; 贾宝玉; 任亮; 布占斌; 段学柱
Original assignee: Zibo Oumu Special Paper Industry Co ltd
Current assignee: Zibo Oumu Special Paper Industry Co ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-06-09
Anticipated expiration: 2029-10-12

Abstract

A pressure-stabilizing slurry distributor belongs to the technical field of slurry distributors. The method is characterized in that: the bottom of cloth thick liquid jar (4) is equipped with starching cylinder (1), is equipped with the pump of drawing milk in starching cylinder (1), and the annular equipartition of outer lane of cloth thick liquid jar (4) is many goes out thick liquid branch pipe (5), and voltage regulator device is add at the top of cloth thick liquid jar (4), and voltage regulator device's export supplies the thick liquid system through the tube coupling. The utility model adds the pressure stabilizer on the top of the slurry distribution tank, and forms an air cushion between the upper parts of the slurry liquid level in the slurry distribution tank through the pressure stabilizer, which is used as a pulse attenuator, and can greatly reduce or eliminate the pulse from the slurry approach system; the pulses in the slurry are buffered again through the matching of the plurality of slurry outlet branch pipes and the pressure stabilizing device and are brought into the wet damage pool; the pulp after multiple pulse attenuation enters the head box. The bottom of the slurry distribution tank is provided with a sizing column body, and the cylindrical slurry distributor solves the problem of pressure difference when slurry flows enter each branch pipe. The problem of consistent pressure of the slurry flow entering all branch pipes can be realized.

Description

Steady voltage cloth thick liquid ware

Technical Field

A pressure-stabilizing slurry distributor belongs to the technical field of slurry distributors.

Background

At present, a bottom sizing part of a pulp distributor is mostly in a conical structure, a flow box is not provided with a return pipe, the problems of uneven pulp outlet pressure, easy generation of bubbles, large longitudinal deviation and the like are easily caused, and a processing device capable of reducing the bubbles and the longitudinal deviation is needed. In the pulp distributor of the original pulp box, a pulp inlet main pipe is designed into a conical pipe, the flat top is flat, no backflow exists, pulp flows entering each branch pipe generate pressure difference, and especially the pressure of the pulp flow entering a straight pipe at the tail end of the main pipe is more obvious than the pressure difference of the pulp inlet at the initial end; air bubbles are easy to generate; for example, the designed speed of the machine is 250m/min, the actual speed is 130 m/min, although a low-pulse pump is adopted, the speed is low, the pulse is relatively large, the pulse can cause the longitudinal quantitative fluctuation of paper, and the quantitative fluctuation caused by a closed full-flow type head box with higher speed is more prominent; therefore, the problems of longitudinal deviation and air bubbles in the production process are always obvious.

From the reasons for pulse generation: the pulp interacts with the pipe wall to generate pressure pulses, and the pressure pulses caused by a fan pump or other external factors are analyzed and a method for eliminating the pulses is explored:

1. improving the design and operation of a pulp supply system;

2. the pressure pulse of the rotor screen and the slurry pump is reduced as much as possible;

3. the degassing is enhanced, and the air and the foam of the paper stock are effectively reduced.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: overcomes the defects of the prior art and provides a pressure-stabilizing pulp distributor which reduces pressure pulses and avoids air and foam.

The utility model provides a technical scheme that its technical problem adopted is: this steady voltage cloth thick liquid ware, its characterized in that: including cloth thick liquid jar, the bottom of cloth thick liquid jar is equipped with the starching cylinder, is equipped with the pump of taking out in the starching cylinder, and the many play thick liquid branch pipes of outer lane annular equipartition of cloth thick liquid jar, voltage regulator device are add at the top of cloth thick liquid jar, and voltage regulator device's export is passed through the pipe connection and is supplied the thick liquid system.

The utility model changes the structure and the working mode of the traditional slurry distributor, adds the pressure stabilizer on the top of the slurry distribution tank, forms an independent space on the upper part of the slurry liquid level in the slurry distribution tank through the pressure stabilizer, and forms an air cushion as a pulse attenuator, which can greatly reduce or eliminate the pulse from the slurry flow system; part of the white water and the bubbles which cannot be blocked by the pulse attenuator flow back to the wet loss pool through an outlet of the pressure stabilizing device; the flexible branch pipes are preferably adopted as the plurality of slurry outlet branch pipes, and have a mechanical separation effect on pulses from the sizing system; the pulses in the slurry are buffered again through the matching of the plurality of slurry outlet branch pipes and the pressure stabilizing device and are brought into the wet damage pool; the pulp after multiple pulse attenuation enters the head box. The bottom of the slurry distribution tank is provided with a sizing column body, and the cylindrical slurry distributor solves the problem of pressure difference when slurry flows enter each branch pipe. The problem of consistent pressure of the slurry flow entering all branch pipes can be realized. Redundant bubbles flow back to the pulp supply system through the pressure stabilizing device and do not enter the pulp flowing box any more, so that paper defects caused by the bubbles are avoided, the problem of paper breakage caused by large longitudinal gram weight change is avoided, and the product quality is greatly improved.

And a sizing cone is arranged between the lower part of the slurry distribution tank and the sizing column body.

And a filtering sieve plate is arranged between the slurry distribution tank and the slurry feeding cylinder.

The liquid level of the slurry in the slurry distribution tank is higher than the outlet height of the slurry outlet branch pipes.

The pressure stabilizer comprises a pressure stabilizing end socket and a return pipe, wherein the pressure stabilizing end socket is arranged at the top of the slurry distribution tank in a sealing manner, the return pipe is arranged on the pressure stabilizing end socket, and an adjusting valve is arranged on the return pipe.

Compared with the prior art, the utility model discloses the beneficial effect who has is:

Reducing longitudinal deviation, wherein the gram weight of the base paper before modification is 8-12 g, and the gram weight after modification is reduced to 5-7 g; the bubbles are reduced, and the redundant bubbles flow back through the return pipe and do not enter the head box any more, so that paper defects caused by the bubbles are avoided; the product quality is improved, the paper breaking problem caused by large longitudinal gram weight change is avoided after modification, and the product quality is greatly improved.

Drawings

Fig. 1 is a schematic structural diagram of a pressure-stabilizing slurry distributor.

Wherein, 1, a sizing column body 2, a column 3, a filtering sieve plate 4, a slurry distribution tank 5, a slurry outlet branch pipe 6, a pressure stabilizing seal head 7, a regulating valve 8, a return pipe 9 and a sizing cone.

Detailed Description

Fig. 1 is a preferred embodiment of the present invention, and the present invention will be further explained with reference to fig. 1.

Referring to figure 1: the utility model provides a steady voltage cloth thick liquid ware, includes cloth thick liquid jar 4, and the bottom of cloth thick liquid jar 4 is equipped with starching cylinder 1, is equipped with the pump of taking out in the starching cylinder 1, and the annular many play thick liquid branch pipes of equipartition of outer lane of cloth thick liquid jar 4 5, and pressure stabilizer is add at the top of cloth thick liquid jar 4, and pressure stabilizer's export is passed through the pipe connection and is supplied the thick liquid system.

A sizing cone 9 is arranged between the lower part of the sizing tank 4 and the sizing column 1. A filtering sieve plate 3 is arranged between the inner part of the pulp distribution tank 4 and the sizing column body 1. The liquid level of the slurry in the slurry distribution tank 4 is higher than the outlet height of the plurality of slurry outlet branch pipes 5.

The pressure stabilizing device comprises a pressure stabilizing end socket 6 and a return pipe 8, wherein the pressure stabilizing end socket 6 is arranged at the top of the slurry distribution tank 4 in a sealing manner, the return pipe 8 is arranged on the pressure stabilizing end socket 6, and the return pipe 8 is provided with an adjusting valve 7.

The method is characterized in that workers reform the existing slurry distributor, a conical pipe in the slurry distributor is changed into a cylindrical shape, a planar capping is changed into a circular end enclosure to serve as a pressure stabilizing end enclosure 6, a return pipe 8 is additionally arranged at the upper part of the circular end enclosure, and the return pipes 8 are additionally arranged at the front two sides of a step orifice plate; the utility model discloses a cloth thick liquid ware's main part comprises last cylinder and lower cone, and there is the thick liquid mouth down cone bottom, and the centre is for filtering sieve 3, and the upper end is a cylindrical balanced chamber, goes up the cylinder and flows the branch pipe around establishing many thick liquids stream outward, is connected with head box with the flexible pipe. The liquid level of the slurry flow in the cylinder is maintained at the upper part of the inlet of the slurry outlet branch pipe 5, and the space between the liquid level and the top of the cylinder is an air cushion which is used as a pulse attenuator and can greatly reduce or eliminate the pulse from a slurry flow feeding system; the part of the white water and the bubbles which cannot be blocked by the pulse attenuator enter the wet loss pool through the return pipe 8; the flexible branch also has a mechanical separation effect on the pulses from the sizing system; a return pipe 8 additionally arranged between the flexible branch pipe and the step orifice plate buffers the pulse in the slurry again and brings the pulse into a wet damage pool; the pulp after multiple pulse attenuation enters the head box. The cylindrical slurry distributor solves the problem of pressure difference of slurry flow entering each branch pipe. The problem of consistent pressure of the slurry flow entering all branch pipes can be realized.

The working principle is as follows: the inlets of the slurry outlet branch pipes 5 are arranged on the same elevation of the slurry distributor, the inlets of the slurry outlet branch pipes 5 are parallel to the slurry flow picture, the equal liquid level height is ensured, and the pressure of the slurry flow entering the slurry outlet branch pipes 5 is consistent. The shape, size and smoothness of the inlet of each slurry outlet branch pipe 5 are processed into the same conditions. Meanwhile, the inner surfaces of the flexible branch pipes with equal diameter, equal length and same finish degree are strictly ensured, so that the pulp flow has the same friction loss when flowing through the flexible branch pipes, the pulp flow entering the pulp flowing box is ensured to have equal pressure and equal speed, and uniform pulp distribution is realized. The cylindrical slurry distributor is connected with the head box, and can enable slurry flow to pass through the head box to net under the action of a single air cushion of the slurry distributor. The air cushion at the top of the cylinder on the cylindrical slurry distributor can greatly reduce or eliminate the pulse from the slurry flow system. At the same time, the flexible pipe branch also has a mechanical separation effect on the pulses from the sizing system. The return pipe before the stepped orifice plate attenuates the pulses in the slurry again. All these means of attenuating the pulp stream pulses work well for reducing and eliminating longitudinal quantitative fluctuations of the paper.

The gram weight longitudinal deviation of the base paper of the existing pulp distributor is 8-12 g, and the gram weight longitudinal deviation of the base paper of the pulp distributor of the utility model is reduced to 5-7 g; the problem of paper breaking caused by large longitudinal gram weight change is solved, and the product quality is greatly improved; the bubble problem is also significantly reduced after separation through the return conduit.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A steady voltage cloth thick liquid ware which characterized in that: including cloth thick liquid jar (4), the bottom of cloth thick liquid jar (4) is equipped with starching cylinder (1), is equipped with the pump of drawing milk in starching cylinder (1), and the annular equipartition of outer lane of cloth thick liquid jar (4) is many goes out thick liquid branch pipe (5), and pressure stabilizer is add at the top of cloth thick liquid jar (4), and pressure stabilizer's export supplies thick liquid system through the pipe connection.

2. A stabilized pulp distributor according to claim 1, characterized in that: a sizing cone (9) is arranged between the lower part of the sizing tank (4) and the sizing column body (1).

3. A stabilized pulp distributor according to claim 1, characterized in that: a filtering sieve plate (3) is arranged between the inner part of the pulp distribution tank (4) and the sizing column body (1).

4. A stabilized pulp distributor according to claim 1, characterized in that: the liquid level of the slurry in the slurry distribution tank (4) is higher than the outlet height of the slurry outlet branch pipes (5).

5. A stabilized pulp distributor according to claim 1, characterized in that: the pressure stabilizing device comprises a pressure stabilizing seal head (6) arranged at the top of the slurry distribution tank (4) in a sealing manner and a return pipe (8) arranged on the pressure stabilizing seal head (6), and the return pipe (8) is provided with an adjusting valve (7).