A double adjustable pulverized coal distributor

Abstract

The invention provides a pulverized coal distributor allowing double angles to be adjusted. A pulverized coal inlet is formed in the lower part of a middle casing; two spindly baffles are arranged in the pulverized coal inlet; a diffusion tube section is arranged in the lower part of the middle casing, and two symmetric pulverized coal outlets are formed in the upper part of the middle casing; a middle partition board is arranged between two pipelines of the pulverized coal outlets; louvers are mounted in a cavity of the middle casing. Wear-resistant ceramic is attached to inner walls of the pulverized coal inlet, the diffusion tube section, the middle casing and the pulverized coal outlets, and the louvers and the middle partition board are overall made of wear-resistant ceramic through firing. Pulverized coal and air at the outlets are uniformly distributed by adjusting the louvers, the middle partition board and the spindly baffles in the pulverized coal distributor, the ignition condition of a burner is good, burning in a boiler is stable, and the safety and the economical performance of the unit are improved. Besides, the pulverized coal distributor allowing double angles to be adjusted is simple to adjust, wear-resistant, free from leaking, long in service life and suitable for being mounted in narrow space.

Description

technical field [0001] The invention belongs to special equipment for a pulverizing system of a coal-fired boiler, in particular to a double-adjustable pulverized coal distributor. Background technique [0002] In my country's electric power industry, the main production form is coal-fired thermal power generation, and the main power equipment of coal-fired power plants is mainly coal-fired boilers. The economical operation of pulverized coal boilers largely affects the benefits of power companies and the loss of equipment. The pulverized coal distributor is one of the key equipment in the combustion pulverization system of a thermal power plant. It is responsible for rationally organizing the combustion of the boiler and effectively controlling the temperature field in the furnace. Boiler tube burst caused by slagging and thermal deviation in the furnace, avoiding blockage or fire of pulverized coal pipeline. [0003] Supercritical 1000MW unit boilers mostly adopt direct ...

AI Technical Summary

Problems solved by technology

If there is a large deviation in the distribution of pulverized coal and air, such as ±15%, it will affect the ignition of the primary air at the burner outlet and the combustion conditions of the entire furnace, causing problems such as deflection of the flame in the furnace, deviation of steam temperature, and even boiler tube burst.

At the same time, due to the high flow rate of the primary air flow, the wear problem of the pulverized coal distributor is also difficult to solve

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