High-speed jet gas-liquid mixing-phase ejector

Abstract

The invention relates to a fluid ejector, and aims to provide a gas-liquid mixed phase ejector for ejecting at a high speed. The ejector comprises a liquid phase inlet pipe and a gas phase inlet pipe which are provided with a quick coupler respectively; the tail end of the liquid phase inlet pipe is connected with a liquid phase nozzle; the tail end of the gas phase inlet pipe is connected with a gas phase nozzle; the liquid phase nozzle is a single-hole nozzle; a flow passage from the liquid phase inlet pipe to the liquid phase nozzle has smooth transition; the gas phase inlet pipe encloses the outside of the liquid phase inlet pipe to form an annular gas phase flow passage; the gas phase nozzle encloses the outside of the liquid phase nozzle and is connected with a mixed phase flow passage; the tail end of the mixed phase flow passage is connected with an outlet nozzle; and an outlet circulation sectional area of the outlet nozzle is smaller than that of a circulation sectional area of the mixed phase flow passage. The liquid phase nozzle has high-speed outlet liquid flow, and the high-speed outlet liquid flow is interacted with high-speed gas phase flow in the mixed phase flow passage to realize atomization and once more acceleration, thereby the ejector greatly weakens boundary layer effect on the outlet, avoids that liquid drops separating from main jet flow are convergent to drop on the outlet, and can flexibly adjust and control atomization fineness and distribution.

Description

technical field [0001] The invention relates to a fluid injector, more specifically, a gas-liquid mixed-phase injector for high-speed injection, which belongs to fluid atomization injection equipment. Background technique [0002] In the process of industrial production and environmental protection control, it is often encountered that small flow fluids are sprayed into large flow fluids and mixed with each other. In this type of problem, due to the small flow rate and the limited injection position, the small flow fluid can only be partially mixed with the large flow fluid or the required mixing time is too long. Such problems arise when boilers employ selective non-catalytic reduction technology for NOx control, where reducing agents are injected into the flue gas. For this kind of problem, it can not be completely solved by atomizing the small flow liquid fluid into small particles or increasing the swirl degree of the jet. It has unique requirements for the atomization ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of low outlet velocity and insufficient penetration depth in existing atomizing nozzles or injectors, the present invention provides a high-speed spraying gas-liquid mixed-phase injector

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