Colorful steel plate inert gas circulating heating curing method and equipment thereby

Abstract

The invention relates to the explosion-prevention and energy-saving field of the surface treatment of steel plate and the hot air thermo curing of coating, in particular to a method and a device for the inert gas hydronic heating and the curing of a colorful steel plate. The method comprises the following procedures: the coating is cured by heating in a hot-air curing oven; after fuel is burned, air is heated by flue gas through a heat exchanger and blown into a curing oven by a blast blower for heating band steel; the coating is cured; the fuel gas ratio of a burning furnace and a combustion furnace is controlled to control the oxygen content of waste gas below 12 per cent; the oxygen content of waste gas is automatically analyzed, which interlocks with an automatic air-flow control and an automatic alarm system; and an air knife is used for separating the gas in the oven to realize interlocking automatic control and automatic starting emergency. The device comprises a natural gas pipe line, the combustion furnace, the burning furnace, a combustion air pipe line, a heat interchanger, a circulating fan, a coating curing oven, an automatic analyzer for oxygen content, a temperature measuring equipment, a pressure measuring unit, a trip valve, the air knife and a interlocking control device. The fuel and the discharge amount of carbon dioxide can be saved in half. And in proportion as the fuel and the discharge amount is saved, the power consumption of a blower decreases.

Description

technical field [0001] The invention relates to the technical field of steel plate surface treatment, coating hot air heating and curing, explosion-proof and energy saving, in particular to a method and equipment for color steel plate inert gas circulation heating and curing. Background technique [0002] At present, liquid coatings are used to produce color-coated steel sheets at home and abroad, mainly using hot air heating and curing technology. The fuel used is mostly natural gas, and some use gas or light oil. The process of producing coated steel plate is mainly two-coating and two-baking process, and there are also one-coating-one-baking and three-coating-three-baking processes. Taking the two-coating and two-baking process as an example, the process flow is as follows: [0003] Uncoiling→head cutting→tail cutting→sewing (or welding)→deburring→brushing→degreasing treatment→squeezing dry→looper→phosphating treatment (or surface adjustment)→washing→squeezing dry→passi...

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to aim at the hot air circulation heating and explosion-proof safety technology widely used in the production of color coated steel plates, which have excessive energy consumption and insufficient environmental protection, and adopt the technology of inert gas circulation to carry out hot air circulation heating and curing color steel plates Inert gas circulation heating curing method

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