Gas-liquid two-phase reverse flow detection device in the pipe

Abstract

The gas-liquid two-phase reverse flow detection device in the pipe involved in the present invention, because the exhaust pipe is inserted into the side bottom of the main body, a pressure type liquid level gauge is arranged on the side of the main body at the same height as the axis of the exhaust pipe, and the exhaust pipe is connected to the exhaust pipe. The low-level water tank is connected, so when the water backflow occurs in the exhaust pipe, the water directly enters the low-level water tank, thereby preventing water from entering the air supply part. A pressure gauge is installed on the top of the low-level water tank, and a differential pressure level gauge is installed on the bottom of the side, so the gas-liquid Under the condition of reverse flow, the flow rate of backflowing water is accurately measured according to the growth rate of the liquid level. The detection part detects whether the liquid in the exhaust pipe backflows, and the data acquisition part collects gas temperature, gas flow rate, pressure, liquid level growth rate and The liquid level of the main body, the data processing unit obtains the critical exhaust velocity to prevent the occurrence of liquid backflow and the characteristics of gas-liquid two-phase counterflow in the pipe under the condition of stable liquid backflow based on predetermined rules, so that the present invention has the advantages of accurate measurement, low cost and safe and reliable operation advantage.

Description

technical field [0001] The invention belongs to the field of gas-liquid two-phase flow, and in particular relates to a gas-liquid two-phase reverse flow detection device in a pipe. Background technique [0002] In ships such as yachts, diesel engines often use underwater exhaust, because the use of underwater exhaust can significantly reduce exhaust noise and infrared radiation, thereby providing tourists with a quiet entertainment environment. When this kind of diesel engine starts, stops and runs without load, due to the reduction of exhaust pressure and flow, there is a risk of seawater pouring into the diesel engine from the exhaust pipe and causing serious damage to the diesel engine. In order to prevent the diesel engine from water backflow accidents, it is necessary to study the gas-liquid two-phase reverse flow characteristics in the underwater exhaust pipe, that is, the relationship between the gas phase flow in the pipe and the backflow liquid flow. [0003] Gas-l...

AI Technical Summary

Problems solved by technology

Therefore, although there are technical means such as conductivity probe and ray to realize the online measurement of the gas holdup ratio of the gas-liquid two-phase flow in the pipe, the error of the obtained gas holdup ratio is relatively large.

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