A system and a method for collecting and handling dust in a paper-making environment

A dust and environmental technology, applied in the direction of textiles and paper, paper, paper machines, etc., can solve the health hazards of workers, increased dust fire, cleaning problems and other problems

Active Publication Date: 2019-05-24
VALMET AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dust generated can cause worker health hazards and cleaning problems
Also, dust can increase the risk of fire since dusty air can be flammable

Method used

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  • A system and a method for collecting and handling dust in a paper-making environment
  • A system and a method for collecting and handling dust in a paper-making environment
  • A system and a method for collecting and handling dust in a paper-making environment

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Embodiment Construction

[0023] first refer to figure 1 , which shows a perspective view of a portion of a paper machine employing an embodiment of a dust handling system. Reference numeral 21 denotes the environment in which the present invention will be used, and reference numeral 24 denotes a part of a paper machine. In practice, the paper machine includes a cylinder 26 , which is usually a drying cylinder, such as a Yankee dryer, from which the dried paper web 28 is further conveyed to be wound into a roll 30 . At this stage, a large amount of dust from the papermaking process can fill the environment of the paper machine. This is particularly the case when the paper web 28 has been creped from the cylinder 26 by the doctor blade. Airborne dust can contain fibers as well as residues from clays, starches and chemicals used in the papermaking process. In order to reduce health hazards to workers and the risk of fire, the paper machine is provided with a dust handling system generally designated b...

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PUM

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Abstract

The invention relates to a system (1) and a method for collecting and handling dust in a paper-making environment. The system (1) comprises a source of underpressure (2) and an elongated collector (4)that extends along a longitudinal axis and which elongated collector (4) is connected to the source of underpressure (2) through at least one suction duct (7) such that underpressure can be generatedinside the elongated collector (4). The elongated collector (4) has an inlet (5) through which dust-laden air can enter the elongated collector (4) and an exit opening (6) leading to the suction duct(7) through which exit opening (6) dust-laden air can be evacuated from the elongated collector (4). A source of water (8) is connected by at least one water supply duct (10) to the elongated collector (4) such that water from the source of water (8) can be introduced into the elongated collector so that dust in the dust-laden air can be exposed to and mix with the water introduced into the elongated collector (4). A flow meter (12) is functionally connected to the system (1) to measure at least one of a flow of water from the source of water (8) to the elongated collector (4) or a flow of water exiting from the elongated collector (4) through the exit opening (6) of the elongated collector (4) and arranged to send a signal indicating a numerical value for a flow of water that reaches orleaves the elongated collector (4) such that this value can be compared to a predetermined minimum value. The system is used to carry out the inventive method.

Description

technical field [0001] The present invention relates to systems and methods for collecting and treating dust in a papermaking environment. Background technique [0002] Large amounts of dust are generated in rooms where paper machines are used to manufacture tissue paper (tissue paper). For example, dust may be generated when the toilet paper web is scraped off a Yankee dryer. The resulting dust can cause worker health hazards and cleaning problems. Additionally, since dust-laden air can be flammable, dust can increase the risk of fire. Therefore, it is customary to try to expel dust-laden air from the area of ​​the paper machine. A known device for collecting and treating dust in a papermaking environment is disclosed in US Patent No. 6,176,898. This document discloses an apparatus and process in which an elongated collector with an inlet and an outlet is used. A vacuum generating source is connected to the collector, and dust-laden air can be drawn into the collector,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F5/00D21G3/00D21G9/00D21G5/00
CPCD21F5/00D21G5/00D21G9/00D21G3/00D21G7/00
Inventor M·坎多蒂
Owner VALMET AB
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