Soot blowing steam source determining method

Abstract

The invention discloses a soot blowing steam source determining method. The method includes the steps that according to the pressure condition, a soot blowing steam source of a heated face soot blowing device outside an air preheater in a boiler is determined according to the pressure condition; a soot blowing steam source of an airpreheater soot blowing device is determined according to the pressure condition and temperature condition. According to the soot blowing steam source determining method, the energy level of the boot blowing steam is utilized to the maximum degree while the good soot blowing effect is achieved, steam consumption is reduced, and thus the optimum economical efficiency is reached.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to a method for determining a soot blowing steam source. Background technique [0002] Sootblowing steam is the steam used by the boiler for sootblowing, which requires a certain degree of superheat and pressure. The degree of superheat is the difference between the steam temperature and the steam saturation temperature at a certain pressure. During the soot blowing process, the soot blowing steam leads the high-speed jet steam flow to impact on the soot and slagging to generate momentum to make it fall off. Therefore, the higher the flow rate of the soot blowing steam, the greater the steam density and the better the soot blowing effect. The potential energy difference between the high pressure of the soot blowing steam and the weak negative pressure in the furnace forms the high-speed jet driving force of the soot blowing steam. The weak negative pressure in the furnace is a con...

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Problems solved by technology

Cold re-entry steam generally only needs a pressure of about 4MPa, and it works through a high-pressure cylinder. It is very economical as soot blowing steam, but the superheat is low, and some soot blowing effects are not good.

Cold re-export steam generally only needs about 4MPa pressure. It works through the high-pressure cylinder, which is very economical as soot blowing steam. At the same time, the superheat of the outlet steam temperature increases, which improves the soot blowing effect, but it still does not achieve the most economical effect.

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