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Aperture residue-lifting screw for causticizing slaking

A screw and digester technology, applied in the field of causticizing equipment, can solve the problems of loss of solution and waste, and achieve the effects of reducing material consumption, improving utilization rate and simple structure

Pending Publication Date: 2019-05-24
GUIZHOU CHITIANHUA PAPERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the pulping and papermaking process, the main function of the caustic chemical section is to use green liquor to produce white liquor. There is a lime digestion system, that is, it needs to dissolve lime in water to make calcium hydroxide, and then use calcium hydroxide and green liquor to produce white liquor. The production of white liquor is used in the cooking section. In the lime digestion section, due to the presence of some impurities in the lime, some slag will be produced during the process of dissolving in water. It is necessary to use the slag extraction screw to extract it from the digester for discharge, and retain the solution. However, because the screw is in the process of extracting slag, it takes time for the solution to drain from the slag extracting screw, and the gap between the traditional screw and the digester is relatively small, so part of the solution will be discharged together by the screw, which will consume part of the solution. solution, waste

Method used

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  • Aperture residue-lifting screw for causticizing slaking
  • Aperture residue-lifting screw for causticizing slaking

Examples

Experimental program
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Effect test

Embodiment 1

[0011] Embodiment 1: as attached Figure 1~2 As shown, a perforated slag extracting screw for causticization digestion includes a digester shell 1, a screw shaft 3 and a screw 2, and the digester shell 1 is a U-shaped structure arranged obliquely. The inner bottom of the casing 1 is provided with a screw shaft 3, on which a screw 2 is fixedly connected, and the screw 2 is provided with a plurality of discharge holes 4 along the circumferential direction.

[0012] Further, six discharge holes 4 are evenly arranged in a circumferential direction, and discharge holes 4 are arranged in the axial direction of the screw 2 .

[0013] Further, the discharge hole 4 is an arc-shaped oblong hole structure. The hole width is 5 mm, the hole length is 250 mm, arranged in an arc shape, with the screw shaft 3 as the center.

[0014] By opening the discharge hole 4 on the slag extraction screw 2, the solution can flow back into the digester through the discharge hole 4 during the slag extrac...

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PUM

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Abstract

The invention discloses an aperture residue-lifting screw for causticizing slaking, comprising a slaker housing, a screw shaft and a screw body. The slaker housing is of U-shaped structure inclined; the screw shaft is arranged at the inner bottom of the slaker housing; the screw body is fixedly connected to the screw shaft; the screw body is peripherally provided with a plurality of discharge apertures. The aperture residue-lifting screw has the discharge apertures; during residue lifting, a solution may flow back into a slaker via the discharge apertures, no solution waste is caused, and goodresults are attained.

Description

technical field [0001] The invention relates to a causticizing slag extraction machine, in particular to a perforated slag extraction screw for causticizing digestion, and belongs to the technical field of causticizing equipment. Background technique [0002] In the pulping and papermaking process, the main function of the caustic chemical section is to use green liquor to produce white liquor. There is a lime digestion system, that is, it needs to dissolve lime in water to make calcium hydroxide, and then use calcium hydroxide and green liquor to produce white liquor. The production of white liquor is used in the cooking section. In the lime digestion section, due to the presence of some impurities in the lime, some slag will be produced during the process of dissolving in water. It is necessary to use the slag extraction screw to extract it from the digester for discharge, and retain the solution. However, because the screw is in the process of extracting slag, it takes ti...

Claims

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Application Information

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IPC IPC(8): D21C11/00
Inventor 樊亚宏于法利康建
Owner GUIZHOU CHITIANHUA PAPERS
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