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

Abstract

The invention discloses a vertical industrial silicon waste heat boiler with a front membrane wall after-burning hearth and belongs to the technical field of industrial silicon waste heat boiler utilization equipment. According to the technical scheme, the vertical industrial silicon waste heat boiler comprises a boiler barrel, the after-burning hearth, a tail vertical shaft flue, a superheater, an evaporator, a coal economizer and the like. Methanol combustors are arranged on the side wall of the after-burning hearth and are located above a smoke inlet. An anti-explosion door is arranged above the after-burning hearth. One end of a descending pipe is connected with the boiler barrel, and the other end of the descending pipe is connected with a membrane type wall lower header at the bottom of the after-burning hearth through an inlet header of the evaporator. One ends of leading-out pipes are connected with the boiler barrel, and the other ends of the leading-out pipes are connected with an outlet header of the evaporator and a membrane wall upper header. A smoke outlet is formed in the lower side face of the tail vertical shaft flue. One end of a water guide pipe is connected with the boiler barrel, and the other end of the water guide pipe is connected with the coal economizer. The waste heat boiler has the beneficial effects that sealing performance is good, the temperature of smoke at an inlet of the superheater is reduced, the phenomenon that the superheater is too hot and is burnt out during starting of the boiler is avoided, the starting time is shortened, and the safety of the boiler is improved.

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.

Images