Process for conducting dehydration control on white clay calcium carbonate

Abstract

The invention relates to a dehydrating process, in particular to a process for conducting full-automatic dehydration control on white clay calcium carbonate. The process uses a distributed control system (DCS) to control a centrifugal machine to conduct full-automatic dehydration control on the white clay calcium carbonate and includes three steps of multi-time feeding, dehydration at different speeds and gradual material scraping. Devices required by feeding are controlled through DCS control configuration software respectively, a frequency conversion feeding pump motor and a pneumatic feeding adjusting valve in feeding are controlled, and a motor and valve control function block is programmed through control software. During dehydration, the DCS controls the frequency conversion dehydration motor directly to conduct speed adjusting. During material scraping, movement of a pneumatic cylinder is achieved through control of the DCS on an electromagnetic valve, so that a material scraper can scrape materials back and forth for a plurality of times. Whole-course monitoring and control are conducted through a step sequence mode in the whole process, an automation degree is high, centralized monitoring is achieved, labor production efficiency is high, operation stability and accuracy are high, product quality is high, and labor intensity is greatly reduced compared with a traditional control method.

Description

Technical field

[0001] The invention relates to a dehydration process, and more specifically to a process for fully automatic dehydration control of white mud calcium carbonate. Background technique

[0002] The refined white mud calcium carbonate is the sludge after alkali recovery for recycling. It is an important project of national environmental protection. The dehydration of white mud calcium carbonate is an important step. The dehydration with ordinary vacuum pre-hanging machine has a large water content, which is very important for the later stage. Drying and dewatering consumes large amounts of steam and high energy consumption, and the commonly used centrifuge uses a single-feed single-layer scraping method, which makes the centrifuge feed unsatisfactory and scraped each time, and the failure rate is high. Summary of the invention

[0003] In view of the shortcomings of the above-mentioned technology, the present invention provides a process for controlling the centrifuge...

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