Drum liquid level measuring device, system and method

Abstract

The invention provides a steam drum liquid level measuring device, which includes a measuring cylinder connected with the steam drum; the pressure taking port on the upper part of the measuring cylinder is connected to the balance container and then connected to the negative end of the differential pressure transmitter through a pressure guiding tube; the upper part of the measuring cylinder is taken The pressure port is directly connected to the positive end of the differential pressure transmitter through the pressure guide tube; it also includes a pressure transmitter for measuring the pressure in the steam drum, a first thermometer for measuring the temperature in the steam drum, The second thermometer installed on the reference pipeline for differential pressure measurement is used to measure the water temperature of the reference pipeline, and collect the pressure in the steam drum, the temperature in the steam drum, the water temperature of the reference pipeline, measure the differential pressure of the cylinder and calculate the liquid level of the steam drum data processing module. The present invention aims at the characteristics of the variation of the liquid level of the steam drum and the complex situation of its measurement during the operation of the boiler, adopts a reliable and practical method, and comprehensively considers the process parameters such as the pressure in the steam drum and the temperature in the steam drum that affect the liquid level of the steam drum, A more accurate drum liquid level value is obtained through reasoning of expert knowledge.

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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