Combustion system of boiler and combustion method implemented by aid of system

Abstract

The invention relates to a combustion system of a boiler and a combustion method implemented by the aid of the system. The combustion system of the boiler is characterized in that a gas separator (2) is arranged at a flue gas inlet of the combustion system of the boiler, and an online gas component monitoring device (6) is arranged in an inlet main flue (5) and is connected with an oxygen delivery barrier door (4). The combustion method implemented by the aid of the system includes separating air by the aid of the gas separator to obtain O<2>. The combustion system and the combustion method have the advantages that the combustion system is simple in structure, the original boiler does not need to be modified, and denitration tower equipment is omitted; energy can be saved, a part of energy generated during pulverized coal combustion is transmitted into a combustion area via a recycling flue, and accordingly a fuel supply rate can be reduced.

Description

technical field [0001] The invention relates to the field of air pollution control, in particular to a method for reducing NO in denitrification X The generation of air pollution control system. Background technique [0002] At present, the conventional combustion system of the boiler is composed of air-fuel. 21% of the oxygen in the air participates in combustion, and 78% of the nitrogen does not participate in the combustion. A large amount of nitrogen is heated needlessly and discharged into the atmosphere at high temperature, causing a large Heat loss, while nitrogen also reacts with oxygen to produce NO at high temperature X Gas, when discharged into the atmosphere, can easily form acid rain, endanger the normal survival and life of surface animals and plants, and cause environmental pollution. The traditional denitrification method is to introduce the flue gas after the reaction into the denitrification tower, and use ammonia gas or ammonia water to reduce the NO in ...

AI Technical Summary

Problems solved by technology

[0005] However, due to the use of pure oxygen combustion, the temperature in the furnace is extremely high, and the high-temperature furnace requires a large number of backflow flues to reduce the temperature and avoid damage to the furnace body; the amount of flue gas recirculation is large, which increases the operating cost; the construction cost of the oxygen station is high, so the current pure Oxygen combustion is still in the stage of technology research and development and storage potential evaluation in China

Images