Intermittent supercritical unit stabilized-pressure pipe blowing method

Abstract

An intermittent supercritical unit stabilized-pressure pipe blowing method is characterized in that boiler stoppage and shutdown is omitted in the process of supercritical boiler stabilized-pressure pipe blowing, reduced-pressure pipe blowing is performed in hot grinding time first, stabilized-pressure pipe blowing is gradually applied instead, reduced-pressure pipe blowing is applied 2 hours after blowing, a stabilized pressure method is applied after reduced-pressure blowing is performed 5-10 times, and the adverse influences of long pipe blowing period and high oil consumption caused by low condition disturbance in the whole stabilized-pressure pipe blowing process are avoided. The intermittent supercritical unit stabilized-pressure pipe blowing method has the advantages that the defects of long pipe blowing period and high oil consumption of a supercritical unit can be improved, pipe blowing quality is guaranteed, debugging period can be shortened effectively, and fuel is greatly saved.

Description

technical field [0001] The invention belongs to the field of thermal power plants, and is a supercritical method capable of shortening the commissioning period and saving fuel under the premise of ensuring the quality of the blowpipe. Background technique [0002] The pressure-stabilizing or step-down blowpipe has its own shortcomings: the temperature and pressure parameters of the step-down blowpipe vary greatly during the blowpipe process, which is conducive to the shedding of impurities on the pipe wall and the effect is good. However, when the pressure drop coefficient of the step-down blowpipe is greater than 1.4 The effective blowpipe time is relatively short, generally only about 40 seconds at a time, the total number of blowpipes is more, the fuel consumption is large, and it is difficult to control the water level of the water storage tank when the pressure is blown, the temperature of the water storage tank changes greatly, and the loss of metal life is also great. ...

AI Technical Summary

Problems solved by technology

[0002] The pressure-stabilizing or step-down blowpipe has its own shortcomings: the temperature and pressure parameters of the step-down blowpipe vary greatly during the blowpipe process, which is conducive to the shedding of impurities on the pipe wall and the effect is good. However, when the pressure drop coefficient of the step-down blowpipe is greater than 1.4 The effective blowpipe time is relatively short, generally only about 40 seconds at a time, the total number of blowpipes is more, the fuel consumption is large, and it is difficult to control the water level of the water storage tank when the pressure is blown, the temperature of the water storage tank changes greatly, and the loss of metal life is also great. bigger

This not only prolongs the construction period, but also increases fuel consumption