Device capable of improving power station boiler combustion value

Abstract

The invention discloses a device capable of improving the power station boiler combustion value, and relates to power plant boiler devices. Impact-flow four-nozzle primary air opposite impact, dual secondary air four-corner tangential arrangement and reverse dual tangent and air graded combustion are adopted in the device, four nozzles can carry coal powder through one-time air to form opposite impact in the center of a hearth, secondary air is divided into an upper strand of air and a lower strand of air, a forced air opening (10) and a weak air opening (9) are included, the four-corner tangential combustion manner is adopted to form two different included angles on the outlet jet flow center line and the water cooling wall center line, and two imaginary circles with the same direction and different diameters are formed on the center of the hearth. The impact flow primary air four-nozzle opposite impact is adopted, the coal powder gathering high-concentration area and the flowing state high-end turbulent and oscillation area are formed in the impact area, due to the impact area high turbulence and oscillation characteristics, contact between air and coal powder can be increased, the gas flow mutual combustion effect is improved, and combustion stability and economy are improved.

Description

technical field [0001] The invention relates to a power plant boiler device, in particular to a device for increasing the combustion value of the power plant boiler. Background technique [0002] At present, my country's pulverized coal boilers in power stations basically adopt tangential combustion technology, W-shaped flame combustion technology and hedging combustion technology. Among them, the tangential combustion technology can be divided into four-corner tangential arrangement and four-wall tangential arrangement according to the position of the burner. There are two ways of hedging: front and rear wall horizontal symmetry and W-shaped flame symmetry. The four-corner tangential combustion rotates in the furnace to make the flame stroke longer, which is beneficial to combustion; the opposite combustion burners burn in parallel, and the independent combustion stability of a single burner is strong. [0003] But the two methods also have the following disadvantages: ...

AI Technical Summary

Problems solved by technology

[0004] 1. Four-corner tangential combustion method: the required ignition heat is high, the heat loss of solid incomplete combustion is large, the flame is deflected, the slagging is serious, and the peak-shaving performance is poor

[0005] 2. Hedging combustion method: long ignition time, short flame stroke, multiple, high content

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