Paper-pulp washing process and optimizing control

A technology for optimizing control and process, applied in washing/replacing pulp treatment liquid, special data processing applications, instruments, etc., can solve problems such as affecting production, lack of funds, etc. effect of effect

Inactive Publication Date: 2006-08-16
SHANGHAI SIED ELECTRIC DRIVE
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Problems solved by technology

In many paper mills, the concentration of black liquor is manually measured off-line after a certain period of time, and the control of black liquor concentration is not very accurate. Because foreign pulp washing control systems are often matched with beating equipment and technological processes, most domestic paper mills are short of funds. , there is no ability to import a full set of foreign equipment, coupled with the variety of domestic pulp types, foreign systems may not be applicable
[0004] In the pa

Method used

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  • Paper-pulp washing process and optimizing control
  • Paper-pulp washing process and optimizing control
  • Paper-pulp washing process and optimizing control

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Embodiment Construction

[0032] Such as figure 1 As shown, it is a schematic structural diagram of the control system of the flow delivery part. The pulp washing process described uses a multi-stage countercurrent washing process, and the process is as follows:

[0033] Add black liquor to the spray pot 1 to dilute the concentration of the high-concentration pulp to 2.0%-2.5% for the coarse pulp from cooking, then pump it out from the pulp pump and enter the I stage pulp washer 2; The provided black liquor is sprayed and washed, and the washed black liquor enters the black liquor tank 3 of the I section; then the slurry enters the washing machine 4 of the II section, and is sprayed and washed by the black liquor in the black liquor tank 7 of the III section, and the washed black liquor The liquid enters the black liquor tank 5 of the second section to provide washing water for the last section of the washer; the final pulp enters the third section of the pulp washer 6, and is sprayed and washed by the...

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Abstract

A pulp-dressing technology and an optimizating method in pulp-dressing are provided in the invention. It is a multiple-stage countercurrent washing technology .Plasm becomes cleaner from the first stage to the third stage while the washer solvent becomes less concentrated .We adopt double-aim optimazing method which includes an elementary step by orthogonal and diluting factor method; found a dynamic mathematic model by NN method; produce a static model sample collection. Advantages are cleanness and optimal black liquor desity.

Description

technical field [0001] The invention relates to a pulp washing process and an optimization control method, which are used in a papermaking production line and belong to the technical field of papermaking control systems. Background technique [0002] The purpose of pulp washing is to separate the pulp from the cooking liquid as much as possible. The main technical indicators are the degree of washing (residual alkali) and the density of black liquor (degrees Baume). The degree of washing requires that the amount of residual alkali be controlled below 0.05g / L. The black liquor density requires Baume to be controlled within the range of 7-9. In the actual operation process, residual alkali and Baume are two contradictory parameters. To improve the cleaning degree, it is required to increase the washing water, and such a In the future, the Baume degree will be reduced, thereby increasing the steam volume in the evaporation section of the alkali recovery workshop; on the contrar...

Claims

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Application Information

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IPC IPC(8): D21C9/02G06F19/00
Inventor 郭建林汪峰王益珑李仲翥
Owner SHANGHAI SIED ELECTRIC DRIVE
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