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Early warning and emergency shutdown system for submerged-arc furnace safe production

A technology for emergency shutdown and safe production, applied in lighting and heating equipment, etc., can solve the problem of unwarranted failure of malignant accidents of electrodes

Active Publication Date: 2017-09-22
宁夏汇力达工业智能控制技术有限公司
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  • Application Information

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

Method used

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Embodiment Construction

[0018] The technical solution adopted in this specific embodiment is: it uses computers and measuring instruments as hardware, and by performing special calculations and logical judgments on the measurement data, exceeding the standard triggers early warning and emergency shutdown; its operation method is as follows:

[0019] 1. Real-time measurement of the cooling water entering and exiting the furnace through the application of high-precision flow measuring instruments (the phenomenon and characteristic parameters of the large amount of cooling water leaking into the furnace and reaction area of ​​the electric furnace are the difference between the amount of cooling water entering the furnace and the amount of cooling water flowing out amount), and then compared, when the outflow of cooling water is less than a certain amount of inflow, and the temperature of a certain cooling water outlet pipe rises rapidly and reaches the alarm value, it is considered that it has leaked and ...

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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...

Claims

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Application Information

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IPC IPC(8): F27B3/28
CPCF27B3/28
Inventor 张志伟陈立春
Owner 宁夏汇力达工业智能控制技术有限公司
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