Multi-side stereo combustion boiler capable of realizing clean combustion of coal and combustion method thereof

Abstract

This invention relates to one multi-surface stand burst furnace and method to realize coke cleaning burst, wherein, the burst furnace comprises the following parts: column furnace with channel exit located on top cover and rotation row located on the bottom of the furnace; at least one gas chamber and one pair of burst stand symmetric cross isolation element and space burst mouth between the isolation parts down end and furnace row with gas room and burst room connected; each gas chamber top furnace wall is located with each coke adding mouth with smoke exit mouth and reside exit mouth downside as secondary mouth. The burst method is to cooperate with multiple gas rooms through rotation furnace row.

Description

technical field [0001] The invention belongs to the field of raw coal combustion methods and combustion equipment, in particular to a method for reducing boiler soot and nitrogen oxides (NO X ) and carbon monoxide (CO) emissions, and can improve the combustion efficiency and combustion load of the boiler, and realize the multi-faceted three-dimensional combustion furnace and its combustion method for clean coal combustion. Background technique [0002] China's air pollution mainly comes from the burning of coal. At present, a large number of small coal-fired boilers and civil furnaces in my country use traditional combustion methods, which have low combustion efficiency and serious pollution. The development of small and medium-sized clean combustion technology equipment has become the focus and difficulty of our country's current pollution reduction and environmental protection work. [0003] The structure of the traditional boiler is simple, the coal directly enters the ...

AI Technical Summary

Problems solved by technology

Due to the short residence time of flue gas in the high temperature area and the uneven mixing of coal combustion products and excess air, on the one hand, CO and soot cannot be burned, and on the other hand, the NO produced by combustion X Failure to restore, causing environmental pollution and low efficiency

If the excess air ratio or furnace temperature is increased, although the emission of CO and soot is reduced, the NO X However, the emission increases accordingly, and the exhaust gas loss increases; on the contrary, if the excess air coefficient or furnace temperature is reduced, although the NO X The emissions of CO and soot are reduced, but the emissions of CO and soot are increased accordingly

[0004] Chinese patent 95 102081.1 describes a low NO X Anthracite coal combustion method and combustion furnace. Coal is firstly gasified in the gasification chamber by using its own combustion heat and low-oxygen pyrolysis, and the remaining semi-coke after coal gasification is burned in the combustion chamber. Low oxygen dry distillation, pyrolysis, pyrolysis speed is slow, which inhibits NO X The discharge is mainly carried out in the semi-coke area, so the ventilation and combustion speed cannot be too fast. In addition, for the gasification chamber with a large load, there are problems such as coking and coal removal. The above problems limit its application in large-load boilers.

Chinese patent 98202954.3 proposes "a smokeless coal-fired furnace for suppressing nitrogen oxides by double-side coal feeding". This coal-fired furnace can increase the boiler capacity and improve the stability of boiler raw coal combustion. High, coal is easy to coke during the combustion process, and the equipment is complicated

Chinese patent 98207373.9 proposes an anthracite coal-fired boiler that suppresses the emission of nitrogen oxides by burning coal on both sides in the middle. This coal-fired boiler can overcome some of the shortcomings of Chinese patent 98202954.3, but at the same time there are boiler combustion instability, black smoke, etc. question

The boiler combustion technologies provided by the above three patents cannot utilize the residual heat of the ash, resulting in high carbon content in the ash, low boiler combustion efficiency, and slow pyrolysis speed in the gasification chamber

In addition, the boiler combustion technologies provided by the above three patents cannot transport semi-coke smoothly when the load is heavy, and the combustion stability is poor.

Images