Superheater self-diagnosis system and early warning and alarming method thereof

Abstract

The invention relates to a superheater self-diagnosis system and an early warning and alarming method thereof. The superheater self-diagnosis system comprises a superheater inlet steam temperature sensor, a superheater outlet steam temperature sensor, a superheater inlet flue gas temperature sensor and a superheater outlet flue gas temperature sensor which are all connected to a temperature acquisition module, wherein a superheated steam inlet pressure transmitter and a superheated steam outlet pressure transmitter are both connected to a pressure acquisition module; a superheated steam flowmeter is connected to a flow integrating module; and the temperature acquisition module, the flow integrating module and the pressure acquisition module are connected to a cloud platform server after being connected with an Internet of Things transmission module through a PLC internal memory. According to the superheater self-diagnosis system and the early warning and alarming method thereof provided by the invention, superheater outlet steam over-temperature early warning and alarming, outlet steam over-temperature early warning and alarming, in-pipe blockage early warning and alarming, pipe wall temperature prediction, over-temperature early warning and alarming, pipe oxide skin thickness prediction and alarming, and manual measurement input oxide skin thickness correction and iteration functions can be realized.

Description

technical field [0001] The invention relates to the technical field of industrial boiler heat transfer and control technology, in particular to a superheater self-diagnosis system and an early warning and alarm method thereof. Background technique [0002] Superheated steam plays an important role in industrial production. The feed water absorbs radiant heat and convective heat in the boiler to become a steam-water mixture, and the steam-water is separated into saturated steam in the steam drum; the saturated steam absorbs the convective heat and part of the radiant heat of the flue gas in the superheater, and after cooling, it becomes the rated temperature and pressure superheated steam. Because the superheater is generally arranged in the convection flue with a relatively high flue gas temperature, the steam temperature in the superheater is higher than that of the steam-water mixture in the convection tube bundle, and the heat exchange effect between the steam and the fl...

AI Technical Summary

Problems solved by technology

[0005] When salt substances precipitate and block the superheater tube, the superheater is in the high-temperature flue gas characteristics, and the wall temperature of the superheater is prone to overheating. However, the superheater of an industrial boiler is different from a power plant boiler. It has fewer monitoring points and the body of the superheater is hidden. The inside of the boiler body is not easy to be repaired and other characteristics. There are often no signs before the accident. Once the superheater is partially overheated and the tube bursts, it will cause steam leakage, which is a very serious safety accident.

Images