Submerged arc furnace safety production warning and emergency shutdown system

Abstract

The invention provides an early warning and emergency shutdown system for submerged-arc furnace safe production, and relates to the technical field of submerged-arc type resistance electric-arc furnaces. According to the early warning and emergency shutdown system, computers and measuring instrument are used as hardware, and through the calculation and logical judgment on the measured data, early warning and emergency shutdown are triggered when the data exceed standards. The operating method of the early warning and emergency shutdown system comprises the following steps that cooling water in and out of the furnace is measured in real time by using a high precision flow measuring instrument; paste column height is measured through an electrode paste liquid level measuring instrument; electrode current is measured through a large current measuring instrument, and the current mutation is detected; the temperature in the furnace is measured, and the temperature tendency is analyzed; the current and voltage at the high voltage side of the electric furnace is measured; and when the data of the above measuring instruments exceed the standards, warning signals are issued, and when the data exceed the safety warning quota, the emergency shutdown is started. According to the early warning and emergency shutdown system, real time continuous detecting, automatic monitoring and early warning of operation parameters of process and equipment that cause safety accidents can be achieved thoroughly, interlock emergency shutdown is achieved, and the system has higher safety and reliability.

Description

technical field [0001] The invention relates to the technical field of a submerged arc resistance electric arc furnace, in particular to a safety production warning and emergency shutdown system for a submerged arc furnace. Background technique [0002] China is currently the world's largest smelting country. More than 80% of the world's ferroalloys such as calcium carbide, ferrosilicon, calcium silicon, silicomanganese and ferrochrome are produced in China, and more than 99% of industrial silicon is produced in China. Ningxia is a large smelting province in China. The main smelting products account for more than 20% of the country's production capacity. More than 60% of the industrial electricity consumption in the region is consumed by submerged arc furnaces. More than half of the region's GDP and tax revenue come from the smelting industry. The safe production of hot furnace and its industrial chain has always been the top priority of the district's safety production syst...

AI Technical Summary

Problems solved by technology

For equipment damage accidents caused by excessive current in the furnace transformer, only the high-voltage current is detected to protect the furnace transformer, but there is no early warning for vicious accidents caused by soft and hard electrodes.

A comprehensive safety early warning system for submerged arc furnace production process has not yet appeared