Continuous displacement and digestion process for dissolving pulp

A technology of displacement cooking and dissolving pulp, applied in the direction of continuous pulping process, can solve the problems of large plant area and high equipment investment, and achieve the effects of short heating time, steam saving and consumption saving.

Inactive Publication Date: 2011-11-23
曲传武 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Although this method effectively saves heat energy, a large-volume liquid storage tank is installed between each cooking pot, which will result in a larger workshop area and higher equipment investment

Method used

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  • Continuous displacement and digestion process for dissolving pulp
  • Continuous displacement and digestion process for dissolving pulp
  • Continuous displacement and digestion process for dissolving pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 4

[0131] Example 1 One-to-two replacement of four cooking pots

[0132] There are 10 processes in the whole cooking cycle:

[0133]

[0134] Replacement amount

[0135]

[0136] Specific steps are as follows:

[0137] 1. Put the pot in the B pot

[0138] Start the fan for installing the pot, and send the pot into the 52.5m from the hot water tank at the same time 3 Hot water (95°C) or acid solution (volume ratio of solid to liquid: 1:2.5) until the pot is full. Close the pot cover valve, start the medicinal liquid circulation pump, and start circulation. The temperature in the pot is 65-70°C and waits for the temperature to rise.

[0139] Description: 1. Absolutely dry material 35t;

[0140] 2. The water content of the tablet is 50%. With water 35m 3 ;

[0141] 3. Supplementary hot water 52.5m 3 ;

[0142] 4. The remaining space in the pot is 52.5m 3 ;

[0143] 2. Acid replacement in pot B

[0144] After the pot is installed, the pot B will cycle by itself (such ...

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Abstract

The invention relates to a continuous displacement and digestion process for dissolving pulp. By adopting the traditional vertical pot digestion equipment and combining a continuous digestion technology, a fiber raw material is prepared into the dissolving pulp (chemical fiber pulp), and the purposes of saving energy, protecting the environment, improving the yield and the quality and reducing the consumption are fulfilled. A plurality of digestion pots are adopted in the digestion process for the dissolving pulp, the digestion solution outlet of each digestion pot is directly communicated with the digestion solution displacement outlet of other each digestion pot through a pipeline, and random two or more digestion pots form closed circular connection; during working, the same process conditions are set in the digestion process of each digestion pot from filling completion to pot feeding, and three periods of displacement time of all the digestion pots are set to be the same; and by adjusting the time interval between the digestion pots, the displacement time is superposed, namely at least two pots are in the process of acid displacement, neutralization displacement or alkali reclamation displacement in the displacement time, the displacement time is superposed and continuous displacement is performed at the time superposition point.

Description

technical field [0001] The invention relates to a dissolving pulp continuous displacement cooking process, which adopts traditional vertical pot cooking equipment combined with continuous cooking technology to make fiber raw materials into dissolving pulp (chemical fiber pulp), and achieve energy saving, environmental protection, increase yield and quality, and reduce consumption the goal of. The invention belongs to the technical field of pulping in the textile industry. Background technique [0002] The main raw materials for the production of viscose fiber are cotton linter pulp and dissolving wood pulp. In recent years, due to factors such as the reduction of cotton planting area, the increase of cotton linter pulp is very small, so dissolving wood pulp has become the only raw material source for increasing viscose fiber. Dissolving pulp is relatively pure wood pulp and straw pulp after bleaching and extraction of organic solvents. It removes lignin and hemicellulose t...

Claims

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Application Information

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IPC IPC(8): D21C3/24
Inventor 曲传武
Owner 曲传武
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