Steam drum liquid level measuring device, system and method

Abstract

The invention provides a steam drum liquid level measuring device which comprises a measuring barrel connected with a steam drum. A pressure tapping port in the upper portion of the measuring barrel is connected with a balance container and then connected with the negative end of a differential pressure transmitter through a pressure guide tube, and the pressure tapping port in the upper portion of the measuring barrel is directly connected with the positive end of the differential pressure transmitter through a pressure guide tube. The device further comprises a pressure transmitter for measuring the pressure in the steam drum, a first temperature meter used for measuring temperature in the steam drum, a second temperature meter installed on a reference pipeline for differential pressure measurement and used for measuring the water temperature of the reference pipeline and a data processing module used for collecting the pressure and the temperature in the steam drum, the water temperature of the reference pipeline and the differential pressure of the measuring barrel and calculating the steam drum liquid level. The reliable practical method is adopted according to the change characteristics of the liquid level in the steam drum and the measuring complexity, process parameters such as the pressure and the temperature affecting the steam drum liquid level are considered comprehensively, and the accurate steam drum liquid level value is obtained through reasoning of professionals.

Description

technical field [0001] The invention relates to the field of measuring the liquid level of a steam drum in a boiler system, in particular to a device, system and method for measuring the liquid level of a steam drum. Background technique [0002] During the operation of the boiler, the liquid level in the steam drum changes, too high, too low, etc., which are very important to the stable production of the boiler. The liquid level of the steam drum is too high, and the separation of steam and water is insufficient, resulting in the mixed output of steam and water. On the one hand, it affects the quality of steam produced by the boiler, and on the other hand, it causes fouling of the superheater, which reduces the heat exchange efficiency and is easy to burn out; , resulting in discontinuous circulation of steam and water, causing local overheating of the metal to cause pipe bursts and other consequences. Therefore, the accurate measurement of the steam drum liquid level is a...

AI Technical Summary

Problems solved by technology

[0003] At present, in industrial boilers, the widely used methods for measuring the liquid level of the steam drum include the electric contact water level gauge measurement method, the single (double) chamber balance container differential pressure method, etc. The process parameters that have an important influence on the liquid level measurement, the measurement results have a certain error with the actual liquid level value

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