Oxygen alkaline pulping cooking device

Abstract

The invention discloses an oxygen alkaline pulping cooking device which comprises a feeding device, a pre-cooking device, a cooking device and a spraying device, wherein the feeding device is connected with the first end of the pre-cooking device and is used for conveying the pulping raw material into the pre-cooking device for pre-cooking; the second end of the pre-cooking device is connected with the first end of the cooking device, and the pre-cooking device is used for conveying the pre-cooked pulping raw material into the cooking device for cooking; and the second end of the cooking device is connected with the spraying device, and the cooking device is used for conveying the cooked pulp into the spraying device for spraying. The oxygen alkaline pulping cooking device can be used for carrying out oxygen-alkaline cooking pulping on straw pulp and wood pulp, the prepared straw pulp contains more than 10% of silicon dioxide, the yield of a cooking work section reaches up to be more than 50%, and the whiteness reaches 50-60%, so that the device is easy to bleach, reduces the scaling phenomenon of a black liquor concentration evaporator pipeline, is beneficial to clarifying the white liquor in the subsequent causticization process, and improves the alkali recovery rate.

Description

technical field [0001] The invention relates to cooking and pulping equipment, in particular to oxygen-alkali cooking and pulping equipment. Background technique [0002] In the pulping process, especially for grasses in the pulping project, the problem of black liquor recovery has not been effectively solved, the main reason is that grasses contain high silicon content, so that the black liquor extraction and black liquor evaporation efficiency is reduced , so that the gramineous plant fiber cannot be effectively utilized. Therefore, in view of the problems existing in the pulping process, especially the high content of silicon in gramineous plants, the oxygen-alkali pulping process is used to deal with it, but there is currently no equipment specially used for the oxygen-alkali cooking pulping process. Contents of the invention [0003] Therefore, the present invention proposes an oxygen-alkali pulping and cooking equipment that can solve the above problems or at least ...

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Problems solved by technology

[0002] In the pulping process, especially for grasses in the pulping project, the problem of black liquor recovery has not been effectively solved, the main reason is that grasses contain high silicon content, so that the efficiency of black liquor extraction and black liquor evaporation is reduced , so that grass plant fibers cannot be effectively used

Therefore, in view of the problems existing in the pulping process, especially the high content of silicon in gramineous plants, the oxygen-alkali pulping process is used to deal with it, but there is currently no equipment specially used for the oxygen-alkali cooking pulping process

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