A device for measuring liquid phase distribution characteristics in a self-priming Venturi scrubber

Abstract

The invention can be applied to the filter system performance test in the fields of nuclear energy, environmental protection, chemical industry, etc., and in particular relates to a liquid phase distribution measurement device in a self-priming Venturi water washer. The device is composed of a Venturi water washer, a liquid film collection part, a liquid film separation part, a constant liquid level water supply system and an acquisition and measurement system. The water collecting tank and the water retaining cover adopt an inter-embedded design, and multi-stage baffles are set to ensure the accuracy of liquid film flow measurement. The tip of the separation sleeve adopts a peak design, and the precision lifting table and four-point bolt positioning are used to cooperate with each other to realize the effective separation of liquid film and liquid droplets. The four-point precision stud positioning ensures the multi-stage concentricity of the Venturi scrubber, the separation sleeve, and the water shield, avoiding the influence of the eccentricity of the separation sleeve on the separation and measurement of the liquid film. The constant liquid level water tank realizes the constant of the hydrostatic head during the experiment.

Description

technical field [0001] The invention can be applied to the filter system performance test in the fields of nuclear energy, environmental protection, chemical industry, etc., and in particular relates to a liquid phase distribution measurement device in a self-priming Venturi water scrubber applied to a containment filter discharge system. Background technique [0002] The self-priming Venturi scrubber is a filter and discharge device installed in the reactor containment, which is used to effectively filter the radioactive airborne source items to prevent environmental pollution when a serious accident occurs in a nuclear power plant. When the gas flows through the Venturi scrubber, it accelerates continuously in the contraction section of the scrubber and forms a low-pressure zone in the throat section, and the solution is injected into the Venturi scrubber under the action of negative pressure and gravity head, due to the gas- There is a significant relative velocity betwee...

AI Technical Summary

Problems solved by technology

[0006] Question 1: In the industry, the ejection flow of the forced Venturi scrubber is measured by adding a flowmeter. This method cannot be extended to the self-priming Venturi scrubber.

The self-priming Venturi scrubber has a small water volume, and it is difficult to measure its flow rate due to the range and error of the existing flowmeters. Even if some precision flowmeters can measure small flow rates, their diameters are often small. Adding a flow meter creates resistance, which changes the suction characteristics

In the process of measuring the injection volume, there are problems such as large fluctuations in the liquid level of the water supply device and difficulty in constant control of the liquid level, which need to be solved urgently

[0007] Problem 2: Lack of feasible methods to separate and measure liquid film flow

The existing device that separates the liquid film through the guide iron sheet and the slit, because the length and angle of the iron sheet cannot be adjusted, it is difficult to separate and measure the liquid film of different thickness under different working conditions; because it is arranged inside the venturi position, resulting in a change in the cross-sectional area of ​​the Venturi throat and easy air leakage, which has a great impact on the two-phase flow and pressure distribution inside the Venturi scrubber

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