Device and method for measuring size and distribution of middle and small liquid drops in fluid

Abstract

The invention provides a method and a device for measuring the size and the distribution of middle and small liquid drops in fluid. The device comprises a measuring kit and a gas control part, whereinthe measuring kit comprises a kit body with an opening and a closing door for closing the opening, and a detection piece bracket which is used for detachably loading a detection piece is arranged inside the kit body; the gas control part comprises a high-pressure gas source, a gas transmission pipe, an electromagnetic directional valve and a gas cylinder; the gas cylinder is provided with a gas cylinder shaft; the gas cylinder shaft is connected with the closing door of the measuring kit, wherein the gas control part takes gas from the high-pressure gas source as power and controls the closing door of the measuring kit to open and close by controlling the movement of the gas cylinder shaft. The method comprises the following steps: putting the device into measuring fluid atmosphere to cause small liquid drops in the fluid to impact the detection piece for leaving out a mark; and analyzing the mark on the detection piece to obtain the size and the distribution of the granular diameterof liquid drops. The device has simple structure and low cost, is flexible and convenient in operation and applicable to operations in most environments.

Description

technical field [0001] The invention relates to a device and method for measuring the size and distribution of liquid droplets in a fluid, which is mainly used in the test of small liquid droplets in flue gas before and after a demister in a thermal power plant flue gas desulfurization system. Background technique [0002] The content of small droplets in the net flue gas after the desulfurization system directly affects the safe and economical operation of the desulfurization system and even the entire unit. However, the demister of the limestone-gypsum wet flue gas desulfurization system has a critical diameter, so it is impossible to All the small mist droplets in the flue gas are completely removed. During the operation of the demister, the demister larger than the critical diameter can be completely removed by the demister. However, small droplets smaller than this critical diameter can pass through the demister with the flue gas due to their relatively small inertia. ...

AI Technical Summary

Problems solved by technology

If this goes on for a long time, there will be more and more scale-like substances, resulting in a gradual increase in the GGH pressure difference, which affects the safe and economical operation of the entire desulfurization system and even the entire unit.

Because the flow state of the flow field after the demister is very complicated, there is no test method for the content of small droplets after the demister in the desulfurization system at home and abroad.

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