Reliable and efficient bypass flue gas drying tower automatic spraying control system and method

Abstract

The invention discloses a reliable and efficient bypass flue gas drying tower automatic spraying control system and method. The system comprises an inlet flue, a bypass flue gas drying tower, an outlet flue, a waste water inlet pipeline, a boiler load signal input end, an electric adjusting air door control module, a water inlet flow electric adjusting valve control module and a water inlet flow electric adjusting valve feedback control module. According to the system and the method, automatic control on spraying of the bypass flue gas drying tower is realized, meanwhile, the reliability and the accuracy are higher.

Description

technical field [0001] The invention belongs to the technical field of zero discharge of desulfurization wastewater, and relates to a reliable and efficient automatic spray control system and method of a bypass flue gas drying tower. Background technique [0002] With the maturity of bypass flue gas drying technology, more and more power plants have put into operation desulfurization wastewater bypass flue gas evaporation towers to achieve zero discharge disposal of high-salt wastewater at the end. However, the automatic spray control of bypass flue gas drying towers is not satisfactory. The spray volume of bypass flue gas drying towers in some power plants cannot be automatically regulated according to the design conditions. The important reason for this phenomenon is that the designed automatic spray control system is not reliable or practical. Some bypass flue gas drying and spraying control systems rely on reading parameters such as flue gas flow meters or flue gas mois...

AI Technical Summary

Problems solved by technology

However, the automatic spray control of bypass flue gas drying towers is not satisfactory. The spray volume of bypass flue gas drying towers in some power plants cannot be automatically regulated according to the design conditions. The main reason for this phenomenon is that the designed automatic spray control system is not reliable or practical

Some bypass flue gas drying and spraying control systems rely on reading parameters such as flue gas flow meters or flue gas moisture content to achieve automatic regulation. The measured parameters tend to deviate greatly from the real values, which seriously affects the accuracy and reliability of the automatic control system; some automatic control systems for bypass flue gas drying and spraying need to frequently adjust the opening of the flue gas door, which may easily cause smoke Loss of accuracy due to valve wear

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