Vertical industrial silicon waste heat boiler with front membrane wall after-burning hearth

Abstract

A vertical industrial silicon waste heat boiler with a pre-membrane water-cooled wall supplementary combustion furnace, which belongs to the technical field of industrial silicon waste heat boiler utilization equipment. Economizer, etc.; the methanol burner is set on the side wall of the supplementary combustion furnace and above the smoke inlet, and the explosion-proof door is located above the supplementary combustion furnace; one end of the downcomer is connected to the drum, and the other end passes through the inlet header of the evaporator It is connected with the membrane-type wall header located at the bottom of the supplementary combustion furnace, one end of the outlet pipe is connected with the drum, and the other end is respectively connected with the evaporator outlet header and the membrane-type wall header. There is a smoke outlet on the side of the lower part, and one end of the water guide pipe is connected to the drum, and the other end is connected to the economizer. The waste heat boiler of the present invention has the advantages of good sealing performance, reduced smoke temperature at the inlet of the superheater, avoiding overheating and burning out of the superheater when the boiler is started, shortening the start-up time, and improving the safety of the boiler.

Description

technical field [0001] The invention belongs to the technical field of utilization equipment for industrial silicon waste heat boilers, and in particular relates to a vertical industrial silicon waste heat boiler with a pre-membrane water wall supplementary combustion furnace. Background technique [0002] my country is a big producer and consumer of industrial silicon. At present, the energy consumption per unit of industrial silicon production in my country has reached more than 1300KW.h / t, while the energy consumption per unit of industrial silicon production in western developed countries has reached 1100KW.h / t. This shows that my country's industrial silicon energy-saving potential is great. The production of industrial silicon consumes and relies heavily on electric energy. Therefore, the use of waste heat and waste gas from industrial silicon electric furnaces to generate electricity can effectively reduce the energy consumption of industrial silicon and reduce the em...

AI Technical Summary

Problems solved by technology

[0003] The temperature of industrial silicon waste gas is 400-1000 °C, and the flue gas volume fluctuates greatly. Most of the industrial silicon waste heat boilers on the market are low-temperature and low-pressure waste heat boilers. The power generation efficiency is very low, and the energy-saving benefits are not obvious.

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