Pressing apparatus for a paper- or board-making machine for removing fluids from a web by pressing, and a method for treating a web in a paper- or board-making machine

A technology of paper machine and board machine, applied in the direction of paper machine, paper making, pressing part, etc., can solve the problems of paper machine or board machine operation efficiency reduction, pressure loss, pressurized medium leakage, etc., achieve excellent operating characteristics, improve processing Pressure, improve the effect of dehydration
CN101778975AInactive Publication Date: 2010-07-14VALMET CHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
VALMET CHINA CO LTD
Publication Date
2010-07-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

A pressing apparatus for a paper- or board-making machine for removing fluids from a web (W) by pressing comprises at least one belt which guides the web. The belt (20) is impervious to fluids and forms an endless loop. At least one nip is formed between a press roll (2) and a pressure means (1) of the pressing apparatus. The guided web is arranged to pass through the nip. The pressure means comprises at least one pressure chamber containing a pressure medium and extending along the length of the nip in the web moving direction such that the pressure medium directly contacts the belt. The pressure chamber has a pressure-operated sealing member (40) which cooperates with the belt, and the sealing operating pressure is adjusted in accordance with the pressure acting in the pressure chamber.
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Description

technical field

[0001] The present invention relates to a press apparatus of a paper or board machine for removing fluid from a web by pressing, which press apparatus can also be used for pulp and tissue paper, and to a method for treating a web in a paper or board machine material method. Background technique

[0002] It is generally known that in the press section of a paper or board machine a paper or board web can be dewatered by passing the web through a nip defined by two rolls facing each other. One or two press fabrics pass through the dewatering nip, carrying away the water pressed from the web, and the press fabrics are also used to transport the web to and from the press nip.

[0003] Dewatering the web in the press section is the main area to be improved. Since the nip defined by a pair of rollers has a relatively short active area in the direction of web movement, the time spent in the nip by a web moving at high speed is relatively short. However, a minimum ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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