Preparation method of evaporation kettle heating tube bundle

Abstract

The invention discloses a preparation method of an evaporation kettle heating tube bundle. The method comprises the following steps of S1 burdening preparing, S2 evaporation kettle heating tube bundleblank making, S3 thermal treatment, S4 machining, S5, paint spraying and S6 inspecting and packing. The shape treatment and processing step comprises the substeps of 1 turning the outer surface of atube, 2 drilling installing holes, 3 turning the inner surface of the tube and 4 drilling valve core holes. The pretreatment preparation step sequentially comprises the following substeps of 1 conducting the oil removing procedure twice, 2 conducting the flushing procedure once, 3 conducting the degreasing procedure once, 4 conducting the chromium plating procedure once and 5 conducting the deionized water procedure twice. According to the preparation method of the evaporation kettle heating tube bundle, the problems that the bauxite ore pulp in an evaporation kettle reacts at high temperatureand high pressure, and the bauxite ore pulp can easily make contact with the heating tube bundle in the evaporation kettle to form scabs are effectively avoided, and the problems that due to the factthat too many welded junctions exist on an existing heating tube bundle, leakage accidents are easily caused by wear thinning of tube walls or welding points of the heating tube bundle, and the overall production efficiency is affected are avoided.

Description

technical field [0001] The invention relates to the technical field of preparation of heating tube bundles, in particular to a preparation method of heating tube bundles of evaporating kettles. Background technique [0002] The bauxite slurry in the evaporating kettle reacts under high temperature and high pressure, and it is easy to form scabs when it contacts with the heating tube bundle in the evaporating kettle, and this kind of scab is very hard, and the scabs are connected into pieces along the tube wall of the heating tube bundle, and it is very easy to clean Difficult; in addition, because the current heating tube bundle is welded by straight tube groups, the welding joints of the heating tube bundle made in this way are more, because the welding quality requirements of the heating tube bundle are higher, although various improvements have been taken in the welding process before. Quality assurance measures, but under the high-speed erosion of pulp particles, it is e...

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