System for replacing steam internally blowing hot-dip galvanized steel pipe equipment

Abstract

The invention discloses a system for replacing steam internally blowing hot-dip galvanized steel pipe equipment, which comprises an air compressor, a steam drum and an internally blowing device communicated with the steam drum, wherein a pneumatic control membrane valve is communicated with the steam drum and the internally blowing device; a control end of the pneumatic control membrane valve is communicated with an air channel of the air compressor; the steam drum is communicated with an air channel of an air preheater; the air preheater is communicated with the air channel of the air compressor; and the air preheater is arranged in a flue of a heating furnace of a galvanized pot. A safety valve, a temperature meter and a pressure gauge are arranged between the steam drum and the air preheater. The system is easy to be put on a new project; the equipment cost, the production cost and the maintenance cost are lower; and the system can save more energy and the consumption of zinc, is safer and more environmentally-friendly, is simpler and more convenient to operate, and reduces the total cost of the input of a galvanized steel pipe project.

Description

Technical field [0001] The invention relates to a hot-dip galvanized steel pipe internal blowing production equipment system, in particular to a steam internal blowing hot-dip galvanized steel pipe equipment system. Background technique [0002] The hot-dip galvanized steel pipe industry currently uses 350℃ superheated steam to purge the zinc liquid in the inner hole of the galvanized steel pipe. The 350℃ superheated steam is generated by the boiler. The hot-dip galvanized steel pipe industry cannot produce it without the boiler. If it can't work, the boiler is an indispensable special strong inspection equipment. The construction of a hot-dip galvanized steel pipe line requires a 2 ton boiler with superheated steam, and a boiler with superheated steam requires an additional investment of more than 500,000 yuan. The annual cost of the boiler is about 1.1 million yuan (labor costs, fuel Coal fee, inspection fee, environmental protection fee, sewage treatment fee, etc.). However,...

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Problems solved by technology

[0003] In addition, the zinc liquid in the inner hole of the galvanized steel pipe is produced by a 2-ton boiler with a pressure of 0.7-0.8MPa, and the superheated steam at 350°C is transported through the pipeline to the steam drum of the steel pipe internal blowing device for storage, and the membrane valve is controlled pneumatically to control the steam. Instantly purge the zinc liquid in the inner hole of the steel pipe. Since the superheated steam still contains a certain amount of water, the zinc liquid in the inner hole of the steel pipe is purged into: powder, commonly known as: zinc powder. This zinc powder contains moisture and is easy to agglomerate. Easy to oxidize, low utilization value, increased production cost, and the use of boilers is often strictly restricted and inspected by boiler inspection institutes and environmental protection bureaus, and it is difficult for new projects to get the support of national industrial policies

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