AUTOMATED TECHNOLOGICAL COMPLEX OF HIGH-PRECISION FLOWRATES CONTROL OF CHEMICALLY ACTIVE LIQUIDS

Abstract

The article is devoted to the actual problem of real-time automated control of the chemically active substances consumption with high accuracy and quickness, which is an important task of modern industries characterized by flexibility and continuity of production, as well as being dangerous to human health and the environment. The importance of this issue is determined by the constantly growing requirements of the global market and international standards regarding product quality, efficiency and safety of production operations. Widely used control and consumption systems are often inefficient or unsuitable for solving a number of the most important tasks of industries that use chemically active liquids. Therefore, the problem of developing our own competitive easily-operated high-precision technological complexes and systems for controlling and determining the flowrate of chemically active liquids with high accuracy, quickness and the possibility of working in automated mode is relevant. 
 In the article, based on a critical analysis of modern research in the chemically active substances flowrates control systems branch, the necessary to develop an automated technological complex for high-precision control of chemically active liquids flowrates, in particular alcohols, is substantiated, and its structural diagram is presented. The proposed technological complex of high-precision control of chemically active liquids flowrates is a multi-level complex system with technical and software automation tools of different composition, working principles and functional capabilities. Its functional set ensures high accuracy and quickness of measurement in automated and real-time mode. In general, the proposed automated technological complex of high-precision control of chemically active liquids flowrates at each level is implemented in the form of four corresponding interconnected subsystems. As a basic element in the lower level of automated technological complex of high-precision control for chemically active liquids flowrates, a developed precision vortex flowmeter is used, which is resistant to the occurrence of parasitic noises when a vortex is formed behind the streamlined body due to the use of a special shaped and designed streamlined body. Furthermore, in accordance with the requirements of the international standard ISO/DIS 3651-2, the protection of the vortex flowmeter contact elements from the aggressive chemical influence of alcohols is ensured. That increases the reliability of the proposed automated technological complex of high-precision flow control of chemically active liquids in general.