Power plant ultrafiltration membrane integrity online diagnosis device and control method thereof

Abstract

The invention discloses a power plant ultrafiltration membrane integrity online diagnosis device and a control method thereof. The device comprises an ultrafiltration membrane device unit, an integrity detection unit and a control unit, wherein the ultrafiltration membrane device unit comprises an ultrafiltration membrane assembly, an ultrafiltration system water inlet valve is connected with an ultrafiltration membrane assembly inlet and an ultrafiltration system lower discharge valve, an ultrafiltration membrane assembly outlet is divided into two paths, one path is connected with an ultrafiltration system water production manual valve, and the other path is connected with an ultrafiltration system upper discharge valve; the integrity detection unit comprises an ultrafiltration air inletvalve manual isolation valve, an outlet of the ultrafiltration air inlet valve manual isolation valve is divided into two paths, one path is connected with an ultrafiltration membrane assembly air inlet valve set through an ultrafiltration air inlet valve, and the other path is connected with an ultrafiltration membrane assembly inlet. According to the invention, the stability of water quality can be powerfully guaranteed, the operation economy and safety of a unit are improved, the influence caused by the use of ultrafiltration membrane equipment, especially the aging of the equipment or thedamage of the equipment after the continuous water backwashing gas washing process, is reduced, the discovery and diagnosis of fault problems are improved, and the hysteresis quality and randomness are reduced.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering, and in particular relates to an on-line diagnostic device for ultrafiltration membrane integrity in a power plant and a control method thereof. Background technique [0002] In the boiler feed water system of a power plant, the ultrafiltration membrane system, as an essential equipment for preparing desalinated water, plays the role of removing impurities such as suspended solids, macromolecular organic matter and colloids in the water. The osmotic membrane device and the reverse osmosis membrane device can desalinate the ultrafiltration effluent. The ultrafiltration membrane system with normal operation has an excellent water production effect and will not affect the safe operation of subsequent water production equipment. However, with the use of ultrafiltration membrane equipment, especially in the process of continuous water backwashing and air washing, the membrane filaments i...

AI Technical Summary

Problems solved by technology

When the integrity of the ultrafiltration membrane is insufficient, this method cannot be detected and diagnosed in time, and there is a huge lag and randomness, which makes there are hidden dangers in the safe and economical operation of the boiler feed water system

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