Monitoring and controlling method and device for corrosion resistance of heat supply network circulating water system

Abstract

The invention provides a monitoring and controlling method and device for corrosion resistance of a heat supply network circulating water system. The device comprises an agent adding system, a detection system and a controller. The agent adding system comprises an agent preparing box and an agent adding pump which are sequentially connected. The agent adding pump is a frequency variable speed regulating pump, and the output end of the agent adding pump is connected to a heat supply network circulating water replenishing pipeline. An alkalizer solution is contained in the agent preparing box. The detection system comprises a water replenishing box online pH meter and a heat supply network circulating water online pH meter. The replenishing box online pH meter is arranged on a water replenishing box of the heat supply network circulating water system. The input end of the water replenishing box is connected with the heat supply network circulating water replenishing pipeline, and the output end of the water replenishing box is connected to a circulating water way pipeline of the heat supply network circulating water system through a heat supply network circulating water replenishingpump. The heat supply network circulating water online pH meter is arranged on the circulating water way pipeline of the heat supply network circulating water system. The input end of the controller is connected with the output ends of the water replenishing box online pH meter and the heat supply network circulating water online pH meter, and the output end of the controller is connected with theagent adding pump and the heat supply network circulating water replenishing pump.

Description

technical field [0001] The invention relates to the anticorrosion technology of the heating network circulating water system of a power plant, in particular to a monitoring control method and device for anticorrosion of the heating network circulating water system. Background technique [0002] As the demand for civil heating in winter in my country and the demand for thermal energy of enterprises are increasing, more and more thermal power generating units have undergone technical transformation, rapid expansion and increased external heating business, and the high-temperature steam energy of the units is transferred to the heating network cycle. In the water system, due to the long distance between the power plant and the user, the high-temperature circulating water of the heating network can only enter the residential quarters and enterprises that need heat energy through long-distance pipeline transmission, so as to realize the transmission of heat energy. However, becaus...

AI Technical Summary

Problems solved by technology

The low pH value of the circulating water of the heating network causes comprehensive corrosion of carbon steel pipes, and the high content of chloride ions in the circulating water of the heating network forms fatal pitting corrosion on the heat exchangers generally made of stainless steel. Corrosion of pipes and heat exchangers in the system, which is happening more and more at present, has caused incalculable economic losses and social impacts

Images