Chemical detergent for clearing hard scales from air pre-heater and preparation method thereof

Abstract

The invention discloses a chemical detergent for clearing hard scales from an air pre-heater, and belongs to the technical field of detergents. The chemical detergent is prepared from the following ingredients in parts by weight: 22-25.5 parts of 3-methoxy propylamine, 8.3-9.7 parts of pentaerythritol phosphate, 11.2-12.9 parts of N,N-dimethylacetamide, 1.4-2.6 parts of sodium hydroxide, 18.8-20 parts of trisodium phosphate, 7.3-8.8 parts of corrosion inhibitor, 5.6-6.4 parts of stripper, 3.2-4.1 parts of penetrant, 2.5-3.3 parts of surfactant, 8.7-9.6 parts of scale inhibitor, 3.5-4.4 parts of dispersant and 45-58 parts of water. The detergent provided by the invention has the advantages of good comprehensive performance, remarkable cleaning effect and stable performance, and can form a protective layer on the surface of the air pre-heater to play roles in inhibiting scales and preventing rust, and thus, the service life of the air pre-heater is prolonged.

Description

technical field [0001] The invention relates to the technical field of cleaning agents, in particular to a chemical cleaning agent for removing hard scale from an air preheater and a preparation method thereof. Background technique [0002] Rotary air preheater is an important auxiliary equipment in thermal power plant boilers. It is responsible for reducing the exhaust gas temperature and increasing the temperature of hot primary air and hot secondary air. The level of heat transfer performance directly affects the efficiency of boilers, and also plays a vital role in the safe and stable operation of boilers in power plants. However, with the implementation of denitrification transformation and the long-term operation of the equipment, especially in the environment of high temperature and high dust, the air preheater is prone to dust accumulation and clogging, which not only increases the system resistance, but also seriously affects the performance of the air preheater. H...

AI Technical Summary

Problems solved by technology

However, the cleaning agent produces more foam during the cleaning process, which is not conducive to flushing, and cannot have the effect of scale and corrosion inhibition on the equipment. After cleaning, the accumulation rate of hard scale is fast, and the cleaning cycle is short, which affects the use of equipment. life