System for controlling the voltage of an electrofilter

US4432061A · kind A · utility

Assignees

• Metallgesellschaft AG · DE
• Siemens Aktiengesellschaft · DE

Inventors

• Helmut Herklotz · Neu-Isenburg, DE
• Gunter Mehler · Frankfurt am Main, DE
• Franz Neulinger · Langen (Hessen), DE
• Helmut Schummer · Heusenstamm, DE
• Horst Daar · Erlangen, DE
• Walter Schmidt · Bellikon, CH
• Heinrich Winkler · Nuremberg, DE

Key dates

• Filing date: May 6, 1981
• Grant date: Feb 14, 1984
• Expiry date: May 6, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S323/903
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A system for controlling the voltage of an electrofilter of the type which, after a voltage breakdown, substantially reduces the magnitude of the electrofilter voltage. After a predetermined deionization time, the filter voltage is raised to a new level which is lower than the filter voltage at which the initial voltage breakdown occurred, by a predetermined amount. The filter voltage is subsequently raised in accordance with a predetermined voltage-time function until a further voltage breakdown occurs. The electrofilter voltage is controlled by a microcomputer system in accordance with stored control parameter values. The stored control parameter values are advantageously recalled to control the electrofilter voltage in response to the operating state of a plant in which the electrofilter is employed. In plants wherein a plurality of electrofilters are employed, each such electrofilter is controlled by an associated microcomputer system, the plural microcomputer systems being controlled by a central pilot computer. The central pilot computer of the plant computes strategies which enhance the energy efficiency of the overall electrofilter purification system.