Vertical boiling pot for paper pulp

Abstract

The vertical paper pulp boiling pot has steam heating pipe with steam inlet on its one end and steam pores on its wall. By means of the steam heating pipe and the circular heating, the paper pulp boiling pot has homogeneous pulping, raised boiling speed, raised straw pulp quality and yield. The prepared straw pulp may be used to replace wood pulp, and hw light color, high whiteness, low hardness, high strength and other advantages. In addition, the black liquor may be reused to reduce drainage and save water.

Description

technical field [0001] The invention relates to a cooking equipment in a pulp manufacturing process, in particular to a pulp vertical cooking pot with built-in microporous steam pipes. Background technique [0002] How to use non-forest fiber raw materials, develop a suitable pulping process route and equipment, change the current situation that non-forest fiber raw materials can only produce medium and low-grade pulp, and reduce the amount and difficulty of waste liquid treatment. One of the major issues facing. [0003] In the prior art, fiber raw materials such as wheat straw (grasses) and alkaline or sulfate cooking liquid are added together in a vertical cooking pot, steam is introduced, the temperature is raised, the gas is slightly deflated, the temperature is raised again, and heat preservation is carried out for degassing. Lignin reacts to make wheat straw (grass) pulp. Those skilled in the art are familiar with the characteristics of grass pulping: shorter fibers...

AI Technical Summary

Problems solved by technology

The main difference between this cooking pot and the prior art is that a circulating heating system is added to circulate and heat the cooking liquid, and the mechanism of the grate, that is, the filter plate, has been improved, and the lower grate has been canceled. Although this patent solves the problem of cooking liquid It cannot be heated in a cycle, and the grate is easily blocked by grass pulp. However, the heating steam during cooking enters the pot from the four-way pipe 10 at the bottom of the pot for cooking. Due to the uneven heating of the upper and lower steam, it is easy to cause the lower part to become Pulp, the upper fiber has not been dissociated, the pulp is not formed, and the cooking process is not complete

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