Anti-dew ventilation method and facilities for main factory building of cold rolling factory

Abstract

The invention relates to a dew prevention and ventilation method and facility for main workshop of cold rolling plant, which comprises the delivery of hot air. The invention gushes high speed hot air via an air blowing port on the pipe network laid on the ground at the peripheral of a steel coil; a hot air screen that isolates with other zones of the plant is formed in the steel coil piling zone, so that the ambient temperature in the steel coil piling zone is higher than the dewing temperature. The invention also comprises a monitoring system and delivers hot air to the ventilation system according to the monitoring signal fed back by the steel coil piling zone, so as to prevent the dewing of steel coil. The facility in the invention comprises: a dew point monitoring system, a monitoring point is positioned at a testing coil pre-arranged at the steel coil piling zone, an equipment for the monitoring and early warning of the dewing temperature of steel coil is positioned in the monitoring point; a hot air delivery system, the hot air delivery pipe network is laid collectively on the ground next to the steel coil and a blowing port (10) is positioned on the pipeline of the pipe network. Therefore, the invention, which can prevent the discard of a great number of steel coil due to dewing, reduces the consumption of energy resources, assures low equipment operation cost, realizes little work load for maintenance and overhaul as well as ensures low investment cost in each time.

Description

technical field [0001] The invention relates to the field of ventilation facilities, in particular to an anti-condensation ventilation method and facilities for the main building of a cold rolling mill. Background technique [0002] Corrosion caused by dew condensation on steel coils is a common quality problem in the cold-rolled steel coil storage area, which has always plagued the cold-rolled storage area management and production organization. [0003] Therefore, anti-condensation measures must be taken in the steel coil stacking area, that is, according to the divided steel coil stacking area and height, a centralized hot air supply pipe network is laid on the floor around the steel coil, and the air outlet is installed on the pipe to blow high-speed hot air. A hot air curtain is formed in the steel coil stacking area in a surrounding shape, and it is separated from other areas of the main workshop to ensure that the temperature of the surrounding air where the steel coi...

AI Technical Summary

Problems solved by technology

[0004] For example: Baosteel's 2030mm cold rolling plant (put into operation in October 1990) adopts the method of steel coil storage, which is to set up heaters and mechanical air supply and exhaust systems in the whole workshop. High operating costs, heavy workload for maintenance and repair, and high investment costs

[0005] Another example: Baosteel Cold Rolling Department No. 2 color coating unit (put into operation in April 2001) adopts the method of raw material warehouse and finished product warehouse by setting up combined ventilation unit hot air supply system in the whole warehouse, mechanical exhaust of roof fan for comprehensive ventilation, workshop roof The inner surface is provided with thermal insulation material, which consumes a large amount of energy medium-capacity and steam, and the annual equipment operation cost is high, the maintenance workload is large, and the one-time investment cost is high

[0006] Another example: the steel coil warehouse of Wuhan Iron and Steel Co., Ltd. (the system was put into operation in 1999) adopts the regional floor to set up pipe steam heating, but because of the ineffective effect, maintenance, operation and other reasons, it was later demolished

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