Vertical anti-coking pulverized coal hot air furnace

Abstract

The invention discloses a vertical anti-coking pulverized coal hot air furnace which comprises a feeding system and a high-temperature combustion chamber, as well as a combustion supporting system, an auxiliary combustion and mixing system and a detection and control device, wherein the high-temperature combustion chamber is in the shape of a vertical structure, the combustion supporting system comprises a combustion supporting fan, a peripheral cyclone air pipe, an auxiliary air pipe and an air blowing pipe, the auxiliary combustion and mixing system comprises an outer housing, a lower ash hopper, an auxiliary combustion chamber, a mixing device, a fan, a motor, a ventilation pipe and an air outlet pipe, the mixing device sequentially consists of an upper cylinder body, a middle cylinderbody and a lower cylinder body with different diameters from small to big, a plurality of ventilation small holes are respectively formed on the surfaces of the upper cylinder body, the middle cylinder body and the lower cylinder body, the upper cylinder body, the middle cylinder body and the lower cylinder body are sequentially arranged in the outer housing from top to bottom, an annular gap is retained between a lower opening of the upper cylinder body and an upper opening of the middle cylinder, the annular gap is retained between the lower opening of the middle cylinder and the upper opening of the lower cylinder, and the detection and control device comprises a thermocouple, a programmable logic controller and a frequency inverter.

Description

Technical field [0001] The invention relates to a device for generating high-temperature hot air using pulverized coal as fuel, in particular to a vertical anti-coking pulverized coal hot air stove. Background technique [0002] The existing pulverized coal hot blast stove is usually a horizontal structure, which contains a furnace body and a feeding system. The furnace body is composed of a high-temperature combustion chamber and an auxiliary combustion chamber. The auxiliary combustion chamber is located behind the high-temperature combustion chamber, and the front end of the high-temperature combustion chamber There is a feeding port. The rear end surface of the auxiliary combustion chamber is provided with a horizontal air outlet. The feed system is located on the front side of the high temperature combustion chamber. When working, the feed port of the feeding system sprays coal powder into the high-temperature combustion chamber for combustion, and some unburned coal ...

AI Technical Summary

Problems solved by technology

Due to insufficient combustion of pulverized coal in the high-temperature combustion chamber and auxiliary combustion chamber, unburned pulverized coal is contained in the high-temperature hot air. A large amount of coking is formed at the horizontal air outlet of the chamber, which blocks the air outlet and seriously affects the normal operation of the hot blast stove

At the same time, since the high-temperature hot air is mixed with air, it is manually controlled, so the temperature of the high-temperature hot air output from the air outlet is not only unstable, but also cannot be accurately controlled

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