Boiler with improved air supply manner

Abstract

The invention relates to a boiler, namely a boiler with an improved air supply manner. The boil is characterized in that a plurality of blowers supply air to a plurality of air chambers of an air supply system. The air supply system is provided with independent air chambers and independent blowers, namely each air chamber is provided with one blower, and each air chamber and the corresponding blower are simultaneously regulated by a frequency changer and a ventilation door, so that the air pressure and air flow of each air chamber can be conveniently accurately controlled; semi coke can be guaranteed to be always in the best burning state on a fire grate; the heat exchange efficiency of the boiler is improved, and the burn-off rate of the semi coke is increased. A lot of experiments prove that because the independent air chambers and the independent blowers are used and are respectively controlled by the frequency changers and the ventilation doors, the burn-off rate of the semi coke is increased from about 90% to about 96%, and the heat exchange efficiency of the boiler is improved from 79% to about 84%. The burn-off rate of the semi coke of which the annual yield is over one hundred million tons at present is increased by 6%, so that 6 million tons of the semi coke is saved; with the continuous development of a coal reduction campaign, the utilized range of the semi coke can be continued to be enlarged, and the energy-saving effect can also be continued to be enlarged.

Description

technical field [0001] The invention relates to a boiler, namely a boiler with improved air supply. Background technique [0002] In the prior art, the current boiler air supply system generally uses one fan to supply air to multiple air chambers at the same time; each air chamber is equipped with an adjusting damper, and each damper is adjusted to distribute air to each air chamber. [0003] The advantage of this air distribution method is low cost, but it is impossible or extremely difficult to finely control the air pressure and air volume of each air chamber, and it is impossible to accurately control the combustion state of the fuel in the boiler. Because the wind pressure and air volume of the total fan are constant, adjusting the damper of any air chamber will change the wind pressure and air volume of all air chambers at the same time. It is time-consuming and laborious to adjust the air pressure and air volume of all air chambers to the specified range, and it is b...

AI Technical Summary

Problems solved by technology

If the adjustment is not good, it will cause too high peroxygen coefficient and reduce the heat exchange efficiency of the boiler; or it will cause insufficient combustion and low burnout rate, which will also reduce the heat exchange efficiency of the boiler

[0007]Because of this characteristic, relying on one fan to supply air to multiple air chambers and relying on simple damper adjustment is no longer suitable for the use of semi-coke special boilers

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