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Method for rapidly measuring material retention on paper making net

A rapid determination and retention rate technology, applied in measuring devices, analyzing materials, and analyzing materials through optical means, can solve problems such as time-consuming, low accuracy, and large errors, and achieve shortened test time, simplified operating procedures, The effect of reducing the error

Inactive Publication Date: 2009-06-17
上海埃格环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But there are many deficiencies in this method: 1. time-consuming; 2. large error and low accuracy (when the white water concentration is 0.1%, 1000ml sample only has 1g solid matter)
[0005] However, the level of retention rate affects the output, quality and pollution load of papermaking wastewater to a large extent.

Method used

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  • Method for rapidly measuring material retention on paper making net

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Determination method of turbidity value

[0026] (1) Take a sample of netting paper material and papermaking white water, stir well and evenly, take 50ml each with a measuring cylinder, add 150ml of distilled water to dilute 4 times, shake well and set aside.

[0027] (2) Pour the above-mentioned prepared samples into the test sample pool in turn, add 2 drops of test stabilization solution, vibrate evenly, then drive away the air bubbles in the bottle, and then put them on the turbidimeter for testing, read after 10 seconds The result is an indirect measure of concentration.

[0028] (3) After finishing, shake well and repeat operation (2), each sample takes 3 valid data.

[0029] 2. Calculation of the actual concentration of the sample

[0030] Input all the tested data into the following regression equation or calculation software in turn, sample concentration c%. The actual value of the concentration can be obtained by calculating according to the following for...

Embodiment 2

[0041] 1. Method of testing light transmittance

[0042] (1) Take 1ml each of the paper stock and papermaking white water samples, dilute with 50ml distilled water, and then measure the light transmittance with a spectrophotometer.

[0043] (2) Repeat operation (1) after completion, and take 3 valid data for each sample.

[0044] 2. Calculation of the actual concentration of the sample

[0045] Input all the tested data into the following regression equation or calculation software in turn, sample concentration c%.

[0046] The actual value of the concentration can be obtained by calculating according to the following formula:

[0047] C%=-2.7551-3.5153*K 0 *log10(T / 100)

[0048] In the formula, K 0 is the experimental constant

[0049] T is light transmittance

[0050] 3. Calculate retention rate

[0051] Put the concentration values ​​of each sample above into the formula:

[0052] SPR%=(c1-c2)*100% / c1

[0053] In the formula, c1 is the concentration of the upper f...

Embodiment 3

[0056] On-line sampling through the online sampling device, the sample taken automatically enters the detection instrument for measurement. After the measurement, the data is collected by the computer and the retention rate is calculated.

[0057] The process is shown in the attached figure.

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Abstract

The invention relates to a method for rapidly determining a retention rate of materials on a wire cloth. The invention provides a method for indirectly determining the retention rate by adopting instrumental analysis to test the concentration of upper wire feed liquid and white water liquid. The method comprises the following steps: 1. using a turbidimeter or a spectrophotometer to test the numerical values of the turbidity or light transmittance of the upper wire and the white water; 2. sequentially inputting the measured turbidity values or the light transmittance values into corresponding computation software to compute the upper wire paper material concentration and the white water concentration; and 3. substituting the concentration values into a formula SPR% =(c1-c2)*100% / c1 (in the formula, c1 is the upper wire feed liquid concentration and c2 is the white water liquid concentration) to compute the retention rate. The method shortens the test time, simplifies the operational procedures, reduces the test errors, can realize 'online detection' by combining with the computation software, and creates conditions for the 'real-time control' of the wet-end chemistry of papermaking.

Description

technical field [0001] The invention relates to a method for quickly measuring the retention rate of materials on a papermaking net, and indirectly measures the retention rate by using an instrument to analyze and test the concentration of the net material liquid and the concentration of white water. technical background [0002] With the rapid development of social economy, the three major elements of quality, cost and environment have become the core of competition in the modern paper industry. How to improve product quality, reduce production cost, and reduce environmental load has become the focus of each of our paper workers. Improving the retention efficiency in the paper sheet making process is undoubtedly one of the important ways to achieve these three goals. [0003] At present, many paper-making enterprises in my country widely adopt a more traditional test method: take 1000ml each of the upper material liquid and white water liquid, filter with filter paper, then...

Claims

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Application Information

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IPC IPC(8): G01N21/17G06F19/00
Inventor 朱勇强
Owner 上海埃格环保科技有限公司
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