On-load washing method for thermodynamic system

Abstract

The invention relates to a heating power system bearing load cleaning method. The feature is adding agent that has cleaning and maintaining function into agent melding trunk and diluted by desalination water. The compounding of the agent is: interface active agent 5-20%, penetrating agent 5-8%, removing agent 5-15%, dispersing agent 5-20%, surface passivator 5-10%, and the other is water. Adding the agent into system while the boiler or the steam turbine is running, the pH value is maintained between 6 and 10 while cleaning.

Description

technical field [0001] The invention relates to a thermal system cleaning method with load, which is used for cleaning boilers and steam turbines. Background technique [0002] The purpose of boiler chemical cleaning is to ensure the safe and economical operation of thermal equipment. Whether to carry out chemical cleaning should be determined according to the specific regulations of the relevant industries. Due to the comprehensive influence of boiler water treatment quality, boiler structure, operating conditions, working pressure, combustion mode and other factors during boiler operation, scaling on the boiler tube wall and excessive temperature of the tube wall often occur. The allowable temperature and technical indicators are the standard. After checking the pipe wall temperature and corrosion and scaling conditions, it is judged whether chemical cleaning is required. The part of the running boiler that is prone to corrosion and fouling is the fire side of the water-c...

AI Technical Summary

Problems solved by technology

[0005] 1. The heated surface that has been corroded (especially with intergranular corrosion) is prone to leakage during the cleaning process, resulting in large area corrosion around the leakage point and innocent damage;

[0006] 2. The traditional cleaning process requires the installation of a complex temporary system. If the temporary system pipeline or cleaning pump fails, it will cause leakage of the cleaning fluid, and in severe cases, it will cause equipment damage and personal injury;

[0007] 3. There are many cleaning steps, the process is complicated, the construction period is long, and the water consumption is large;

[0009] 5. If it cannot be put into operation in time for some reason after cleaning, the cleaning surface will face new corrosion problems

[0010] The steam turbine is a key equipment of the power generation system. After the steam turbine is rotated and the stationary blades are fouled, the efficiency of the steam turbine will be significantly reduced, and the axial thrust will be increased, and sometimes the vibration will be aggravated, resulting in potential safety hazards

After the steam turbine is fouled, it is very difficult to deal with it. Some factories have used manual grinding or even sandblasting to remove the scale, which is labor-intensive and damages the surface of the equipment. However, conventional chemical cleaning is difficult to control, and it is almost impossible to clean the steam turbine.