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Filtered fabrics performance on-line detecting method

A detection method and filter cloth technology, applied in the direction of filtration and separation, separation methods, chemical instruments and methods, etc., can solve problems such as difficulty in use, high manufacturing cost, and insufficient economy, and achieve stable detection performance, reduce production costs, and improve production efficiency effect

Inactive Publication Date: 2005-02-23
ZHEJIANG HUAZHANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two types of infrared sensors: reflective and penetrating. The reflective infrared sensor can only sample the surface of the filter cloth, which is not representative; the penetrating infrared sensor is difficult to use when the filter cloth is too thick and the moisture is too high; and the microwave Although the moisture sensor has the advantages of fast response and relatively high accuracy, it still has the problems of poor stability and high manufacturing cost in hot and humid environments.
The above limitations limit their popularization and application, especially it is difficult to apply in online detection, and the application is limited to temporary detection of handheld devices or offline detection of laboratory
[0004] Due to the lack of effective online detection methods for filter cloth performance, in order to ensure the quality of the filtration process in actual operation, the traditional method of empirical judgment and regular replacement of filter cloth is generally used, which is not scientific and economical enough.

Method used

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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  • Filtered fabrics performance on-line detecting method
  • Filtered fabrics performance on-line detecting method
  • Filtered fabrics performance on-line detecting method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] This example is the application of the present invention to the specification of 700G / M after the felt is separated from the wet paper on the papermaking press section. 2 felt 4 1 Conduct online comprehensive performance testing. Referring to Fig. 1, what this example adopts is to probe 15 1 Set up as a detection system with three detection areas 1-3. Detection areas 1 and 2 are respectively connected to the gas-liquid separation tank 6 1 、6 2 , gas-liquid separation tank 6 1 、6 2 Directly connected to the gas flow meter 7 1 、7 2 , respectively connected to the liquid seal tube 16 1 、16 2 Followed by liquid flow meter 8 1 ,8 2 , gas flow meter 7 1 、7 2 and liquid flow meter 8 1 ,8 2 Pressure regulating valve 9 controlled by controller 14 respectively 1 ,9 2 Connect vacuum tank 11, gas-liquid separation tank 6 1 、6 2 Respectively connected to the pressure sensor 5 1 、5 3 ; Detection zone 3 is connected to pressure sensor 5 4 , connected to the gas f...

example 2

[0042] This example is the separation and filtration of calcium carbonate solid and sodium hydroxide solution used in the chemical industry in the present invention, the filter cloth 4 before the filter cloth enters the filter area 2 Air permeability, liquid content and filtrate detection. The filter cloth used in this process4 2 It is a monofilament rectangular mesh structure with a smooth surface. Referring to Fig. 2, what this example adopts is to probe 15 2 It is set up as a detection system with two detection areas 2 and 3. The vacuum degree used for the two detection zones 2 and 3 is all 0.015MPa vacuum degree, and the detection area is 314mm 2 . The detection system detection area 2 used in this example is connected to the gas-liquid separation tank 6 2 , gas-liquid separation tank 6 2 Direct connection to gas flow meter 7 2 , liquid seal pipe 16 2 Followed by liquid flow meter 8 2 , gas flow meter 7 2 and liquid flow meter 8 2 Pressure regulating valve 9 con...

example 3

[0045] This example is the papermaking press part of the present invention used for the felt cloth and wet paper just after separation, and the specification is 900G / M 2 felt 4 3 Carry out online comprehensive testing. Referring to Fig. 3, what this example adopts is a probe 15 3 Inspection system with five inspection zones. Detection areas 1 and 2 are respectively connected to the gas-liquid separation tank 6 1 、6 2 , gas-liquid separation tank 6 1 、6 2 Directly connected to the gas flow meter 7 1 、7 2 , respectively connected to the liquid seal tube 16 1 、16 2 Followed by liquid flow meter 8 1 ,8 2 , gas flow meter 7 1 、7 2 and liquid flow meter 8 1 ,8 2 Pressure regulating valve 9 controlled by controller 14 respectively 1 ,9 2 Connect vacuum tank 11, gas-liquid separation tank 61 、6 2 Respectively connected to the pressure sensor 5 1 、5 3 . Detection area 3 is connected to pressure sensor 5 4 , connected to the gas flow meter 7 3 Followed by the pres...

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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Abstract

A method for on-line detecting performance of filter cloth includes detecting relative variation of air flow rate and liquid flow rate passing through the filter cloth separately at the same time under certain degree of vacuum and filtering area to realize on-line detection for performance index of liquid content, liquid filtering ability, air permeability, total elasticity, surface elasticity and flatness of the filter cloth.

Description

technical field [0001] The invention relates to a filter cloth performance detection method, in particular to an online filter cloth performance detection method, which is used for liquid content, filtrate, air permeability, overall elasticity, surface elasticity and flatness of filter cloth in papermaking, chemical industry and other industries Online detection of comprehensive performance. Background technique [0002] Filter cloth is a necessity in the filtration process of the paper industry and chemical industry. The comprehensive properties of the filter cloth, such as liquid content, filtrate, air permeability, overall elasticity, surface elasticity and flatness, directly affect the production efficiency and product quality of the filtration process. and production costs. For this reason, it is very important to detect the comprehensive performance of the filter cloth online, so as to grasp the change trend of the filter cloth performance, make effective adjustments ...

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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Application Information

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IPC IPC(8): B01D35/00B01D39/00G01N33/36
Inventor 唐恒博
Owner ZHEJIANG HUAZHANG TECH
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