US20040250975A1

US20040250975A1 - Paper-manufacturing system

Info

Publication number: US20040250975A1
Application number: US10/331,975
Authority: US
Inventors: Jin-hwa Jeon
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-31
Filing date: 2002-12-31
Publication date: 2004-12-16

Abstract

The present invention concerned with a paper-manufacturing system characterized in that the system is composed of a head box (10) for providing pulp fluid which is located at the upper part between the our wire part and the felt a out wire part (20) which is composed of a wire roll (21), a wire guide roll (22), a water tray (23), a forming roll (24) and a wire belt (25) and plays a role for enabling the wire rolls (about 5˜6 rolls) (21) to rotate the wire belt around the wire loop. The surface of the wire rolls is coated with elastomer such as rubber or any other elastic materials.; a press part (40) which is composed of a suction press roll (41), a second touch roll (42), a felt guide roll (43), a felt roll (44) and a felt (45) and a dryer part. The present paper manufacturing system, the inner wire part present in the conventional system is omitted and the inner wire part is replaced with felt loop and two processes are omitted to one process. The rotations of out wire and the forming roll were reversed and the head box located at the lower part between the our wire part (20) and the inner wire part (30) is equipped at upper part between the our wire part (20) and the felt (33) and the supply function of pulp fluid is greatly improved. The dehydrating function, one of the three core functions of paper-manufacturing system, is greatly improved (a high-speed function). The paper quality is quite improved by improving the forming function. The pick up function and transferring function (transferring function of wet paper) are greatly improved. Accordingly, the conventional paper-manufacturing system can be greatly improved without any installation or any investment by the present invention.

Description

DETAILED DESCRIPTION OF INVENTION PURPOSE OF INVENTION TECHNICAL FIELD TO WHICH THE INVENTION PERTAINS AND THE PRIOR ART IN THIS FILED

The present invention relates to an improved paper—manufacturing system.

FIG. 1 is a system for showing conventional paper-manufacturing processes.

The conventional paper-manufacturing system is composed of a head box ( 10), an out wire part (20), an inner wire part (30), press part (40) and a dryer part (50).

(1) The head box ( 10) located at the lower part between the our wire part (20) and the inner wire part (30) is the part for distributing pulp fluid for manufacturing paper on mesh of the wire belt (25) and plays an important role for distributing the pulp fluid uniformly on the mesh of the wire belt (25) having broad width (the width 3˜5 m) and high speed (1500 m/min equivalent to 90 km/h).(The concentration of the average pulp fluid is about 15% of the pulp content).

(2) The out wire part ( 20) is composed of the wire roll (21), the wire guide roll (22), the water tray (23), the forming roll (24) and the wire belt (25), and plays a role for enabling the wire rolls (about 5˜6 rolls) (21) to rotate the wire belt (25) around the wire loop. The diameters of the wire rolls are different in accordance with the speed and the width and are about 300˜500 mm. The surface of the wire rolls is composed of elastomer such as rubber and other elastic materials.

The wire guide roll ( 22) plays a role of performing automatic return of the wire belt (25) for enabling the wire belt (25) to continuously run without escaping from the central orbit and is coated with an elastomer such as rubber like the wire roll.

The pulp fluid which is supplied on the mesh of wire belt ( 25) from the head box (10) is composed of about 99.8% or more of water and about 0.2% or below of pulp and a large amount of water is discharged outside the wire box. The water tray (23) is a tub for taking in and moving water instantaneously discharged from wire box.

The forming roll ( 24) is a large-sized driving roll and rotates with making out wire part (20) and wire belt (25) contact concurrently. Dehydrating and sheet forming are accomplished on this forming roll (24).

The wire belt ( 25) is equipped with a net for discharging and filtering water after receiving dilute pulp fluid.

(3) The inner wire part ( 30) is composed of the wire roll (31), the wire guide roll (34), the pick up roll (32) and the inner wire belt (33). The inner wire belt (33) is linked and geared with the forming roll (24). The wire roll (31) and the wire guide roll (31) play the same role as in the out wire part (20).

The inner wire part plays a role for transferring the formed wet paper to the felt of the press part.

The pick-up roll ( 32) transfers the wet paper transferred onto the inner wire part onto the felt and adsorbs the wet paper by producing vacuum and transfers the wet paper onto the felt.

The vacuum box which is not shown in the drawings, sucks the wet paper formed on the forming roll at the time of separating the out wire and the inner wire and transfers the wet paper onto the inner wire.

The inner wire belt ( 33) is a net like out wire loop but has a more dense structure in order for the wet paper to be transferred onto the inner wire.

(4) The press part ( 40) is composed of the suction press roll (41), the second touch roll (42), the felt guide roll (43), the felt roll (44) and the felt (45).

The suction press roll ( 41) linked with the inner wire part (30) is a vacuum roll for pressing moisture of wet paper to the dryer surface with high pressure and absorbing the water. The outer shell rotates. However as the outer shell is equipped with vacuum box inside discharges the dehydrated water to the outside.

The second touch roll ( 42) is a press roll for removing moisture of the dehydrated wet paper from the suction press roll (41) for the second time. The second touch roll (42) is a perforated plain roll of no vacuum.

The felt roll ( 44) enables the felt to rotate following by the felt loop.

The felt guide roll ( 43) plays a role of performing automatic return for enabling the felt to continuously run without escaping from the central orbit.

The felt ( 45) plays a role of conveyer for transferring the wet paper and provides protection of the wet paper from damage in the case of pressing and dehydrating the wet paper.

In the conventional paper manufacturing system, pulp fluid discharged from the head box are supplied between the out wire belt ( 25) and the inner wire belt (33) which lies one upon another and rotate around the forming roll (24). The dilute pulp fluid is dehydrated by pressure of tension of the out wire belt (25). The wet paper filtered by the out wire and the inner wire is firstly adhered and transferred onto the inner wire and secondly transferred onto the felt by vacuum of pickup system. The wet paper on the felt secondly is dehydrated (strongly dehydrated) on the suction press roll and the second touch roll and is transferred and dried onto the Yankee dryer.

However, this conventional method has been continuously performed nearly 100 years or over without any change or improvement of the main skeleton of the processes of paper manufacturing.

Consequently, there have been some problems, for example, low quality, decrease of flexibility, decrease of strength, increase of pin hole and decrease of productivity, etc.

TECHNICAL MATTER TO BE ACCOMPLISHED BY INVENTION

The present inventor has being studied for improving such problems of the conventional paper-manufacturing system for a long time and finally completed the present invention.

Therefore, the present invention provides a new improved paper-manufacturing system.

The present inventor omitted the function of the inner wire part from the conventional paper-manufacturing system and shortened three processes into two process by replacing the function of the inner wire part with the felt loop. The rotations of out wire and the forming roll were reversed and the head box located at the lower part between the our wire part ( 20) and the inner wire part (30) is equipped at upper part between the our wire part (20) and the felt (33) and the supply function of pulp fluid is greatly improved. The dehydrating function, one of the three core function of paper-manufacturing system, is greatly improved (a high-speed function). The paper quality is quietly improved by improving the forming function. Pick up function and transferring function (transferring function of wet paper) are greatly improved. Accordingly, the conventional paper-manufacturing system can be greatly improved without any installation or any investment by the present invention.

Therefore, the present invention also provides a method for reforming the conventional paper-manufacturing system.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a system showing the conventional paper-manufacturing processes. [0028]
FIG. 2 is a system showing paper-manufacturing processes of the present invention. [0029]

10: Head box 20: Out wire part

40: Press part 50: Dry part

CONSTRUCTION OF INVENTION

The present invention is detailed explained by the accompanied drawing [0030] 2 and desirable examples.
FIG. 2 is a system showing paper-manufacturing processes of the present invention. [0031]
The paper-manufacturing processes of the present invention are composed of head box ([0032] 10) for providing pulp fluid, out wire part (20), press part (40) and dryer part (50).
In the present invention, the head box ([0033] 10) located at the lower part between the our wire part (20) and the inner wire part (30) in the conventional system is equipped at upper part between the our wire part (20) and the felt (33). The inner wire part present in the conventional system is omitted and the press part (40) is directly connected with forming roll (24).
(1) The head box ([0034] 10) located at the upper part between the our wire part (20) and the felt (33) is the part for distributing pulp fluid for manufacturing paper on mesh of the wire belt (25) and plays an important role for distributing the pulp fluid uniformly on the mesh of the wire belt (25) having broad width(the width 3˜5 m) and high speed (1500 m/min equivalent to 90 km/h).(The concentration of the average pulp fluid is about 0.15 % of the pulp content).
(2) The out wire part ([0035] 20) is composed of the wire roll (21), the wire guide roll (22), the water tray (23), the forming roll (24) and the wire belt (25), and plays a role for enabling the wire rolls (about 5˜6 rolls) (21) to rotate the wire belt (25) around the wire loop. The diameters of the wire rolls are different in accordance with the speed and the width, and are about 300˜500 mm. The surface of the wire rolls is composed of elastomers such as rubber and other elastic materials.
The wire guide roll ([0036] 22) plays a role of performing automatic return of the wire belt (25) for enabling the wire belt (25) to continuously run without escaping from the central orbit and is coated with an elastomer such as rubber like the wire roll.
The pulp fluid which is supplied on the mesh of wire belt ([0037] 25) from the head box (10) is composed of about 99.8% of water and about 0.2% of pulp and a large amount of water is discharged outside the wire box. The water tray (23) is a tub for taking in and moving water instantaneously discharged from the wire box.
The wire belt ([0038] 25) is equipped with a net for discharging and filtered water after receiving dilute pulp fluid.
(3) The press part ([0039] 40) is composed of the suction press roll (41), the second touch roll (42), the felt guide roll (43), the felt roll (44) and the felt (45).
The forming roll ([0040] 24) is a large-sized driving roll and rotates with making out wire part (20) and wire belt (25) contact concurrently. Dehydrating and sheet-forming are accomplished on this forming roll (24).
The suction press roll ([0041] 41) is a vacuum roll for pressing moisture of wet paper to the dryer surface with high pressure and absorbing the water. The outer shell rotates. However as the outer shell is equipped with vacuum box inside discharges the dehydrated water to the outside.
The second touch roll ([0042] 42) is a press roll for removing moisture of the dehydrated wet paper from the suction press roll (41) for the second time. The second touch roll (42) is a perforated plain roll of no vacuum.
The felt roll ([0043] 44) enables the felt to rotate following by the felt loop.
The felt guide roll ([0044] 43) plays a role of performing automatic return for enabling the felt to continuously run without escaping from the central orbit.
The felt ([0045] 45) plays a role of conveyer for transferring the wet paper and provides protection of the wet paper from damage during the course of pressing and dehydrating the wet paper.
In the present paper manufacturing system, pulp fluid discharged from the head box ([0046] 10) are supplied onto the forming roll (24) between the out wire belt (25) and felt (45) which lies one upon another and rotate around the forming roll (24). The dilute pulp fluid is drastically dehydrated by pressure of the tension of the out wire belt (25), the falling power of the pulp fluid and the centrifugal power. The wet paper filtered by the out wire is ideally adhered and transferred onto the felt, which has a strong adhesive power. Accordingly, the present system can be operated with high speed than in the conventional system without using pick up equipment and can produce a good yield and good quality of paper. The wet paper on the felt is secondly dehydrated (strongly dehydrated) on the suction press roll and the second touch roll and is transferred and dried onto the dryer part (50) such as Yankee dryer.

The comparative results between the present system and the conventional system are as follow.

TABLE 1


Comparitive results between the present system and the conventional system.

Item	conventional system	present system

Sheet forming + Transfer	3 processes	2 processes
Forming part	Forming roll-right rotation	Forming roll-left rotation
Rotational direction of roll	Out wire part-left rotation	Out wire part-right rotation
Head box	location in the lower part	location in the upper part
Location of installation	Upward material jet	Downward material jet
Main effects
a) Quality(overall) conventional	100%	160% or more

In case that the effect of the system is determined as 100,

Softness	100%	130% or more
Strength	100%	120% or more
Bulk	100%	110% or more
Pin Hole & pick out	100%	10% or below
b) Productivity increase	100%	150% or more
(Same conditions of quality)
Speed	about 1200 m/min	about 2000 m/min
c) Profit efficiency	100%	1000% or more
Price superiority	100%	130% or more

As confirmed in the above table, the present system has excellent effects when compared with those of the conventional system. [0048]

EFFECT OF INVENTION

In the present paper manufacturing system, the inner wire part present in the conventional system is omitted and the inner wire part is replaced with felt loop and two processes are omitted to one process. The rotations of out wire and the forming roll were reversed and the head box located at the lower part between the our wire part ([0049] 20) and the inner wire part (30) is equipped at upper part between the our wire part (20) and the felt (33) and the supply function of pulp fluid is greatly improved. The dehydrating function, one of the three core functions of paper-manufacturing system, is greatly improved (a high-speed function). The paper quality is quietly improved by improving the forming function. The pick up function and transferring function (transferring function of wet paper) are greatly improved. Accordingly, the conventional paper-manufacturing system can be greatly improved without any installation or any investment by the present invention.

Claims

1. A paper-manufacturing system characterized in that the system is composed of:

a head box (10) for providing pulp fluid which is located at the upper part between the our wire part and the felt,

an out wire part (20), which is composed of a wire roll (21), a wire guide roll (22), a water tray (23), a forming roll (24) and a wire belt (25),

and plays a role for enabling the wire rolls (about 5˜6 rolls) (21) to rotate the wire belt around the wire loop. The surface of the wire rolls is coated with elastomer such as rubber or any other elastic materials; and

a press part (40) which is composed of a suction press roll (41), a second touch roll (42), a felt guide roll (43), a felt roll (44) and a felt (45) and a dryer part.

2. A process for reforming a conventional paper-manufacturing system characterized in that in the conventional paper-manufacturing system composed of a head box (10), a out wire part (20), a inner wire part (30), press part (40) and a dryer part (50), and

the inner wire part (30) is omitted and the inner wire part is replaced with felt loop and two processes are omitted to one process. The rotations of the out wire and the forming roll are reversed and the head box located at the lower part between the out wire part (20) and the inner wire part (30) is equipped at upper part between the out wire part (20) and the felt (33).