Steam box and method for preventing condensate water from dripping

Abstract

The invention discloses a steam box and a method for preventing condensate water from dripping, wherein the steam box comprises a steam box body, a pre-heat box body, a steam main pipe, steam branch pipes and a pre-heat branch pipe; the pre-heat box body is set at the periphery of the steam box body and a pre-heat interlayer is set between the pre-heat steam box body and the steam body body; two side walls opposite to the steam box body are respectively provided with steam inlets; the steam main pipe is connected to the steam inlets through the steam branch pipes; and the steam main pipe is connected to the pre-heat interlayer through the pre-heat branch pipe. The method is that the steam main pipe is used to provide steam for the pre-heat branch pipe firstly; after steam goes into the pre-heat interlayer, the steam box body and a steam spay pipe are pre-heated; after the pre-heated process is finished, a control valve of the pre-heat branch pipe is regulated so as to reduce steam flow inside the pre-heat branch pipe; at the same time, the steam main pipe is used to convey steam to the steam box body through the steam branch pipes; and after steam goes into the steam box body, the steam spray pipe is used to spray steam on the surface of a piece of paper. The steam box provided herein has the advantage of simple structure and low manufacture and maintenance cost; and at the same time, the steam box provided herein also has the advantages of preventing the condensate water from dripping effectively.

Description

technical field [0001] The invention relates to the technical field of pulping and papermaking, in particular to a steam box and a method for preventing condensed water from dripping. Background technique [0002] In the drying section of the paper machine and the calender, steam is sprayed along the paper banner, and the steam condenses in the paper to release latent heat, thereby improving the drying capacity of the drying cylinder, adjusting the uniformity of the moisture content of the paper banner, and improving the calendering. The printing performance of the paper, the coating performance of the coated paper, and the uniformity of the printing performance, so the steam box is widely used in various high-grade paper machines, especially special paper machines, such as decorative base paper. [0003] It is very important that the steam sprayed from the steam box is kept away from water droplets, otherwise the sprayed water droplets will cause paper defects on the paper....

AI Technical Summary

Problems solved by technology

[0007] The patent application with the application number US5211813 provides another solution. The steam box includes multiple steam chambers. In addition to the preheating steam chamber, the steam from the main pipe passes through multiple steam chambers, and the condensed water is filtered layer by layer before being sprayed into the on the paper, so that the steam sprayed on the paper does not contain condensation, this method is effective, but the equipment is very complicated and expensive to manufacture and maintain

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