Pretreatment method for impinging wet steam vapor-liquid two-phase separation

Abstract

The invention discloses a collision-type wet steam steam-liquid two-phase separation pretreatment method. The collision-type wet steam steam-liquid two-phase separation pretreatment method is characterized by comprising the following steps that firstly, wet steam guided out by a steam turbine is guided by an external wet steam guide device, and is then guided to a wet steam distribution region of a steam collision load device from an inlet region of a wet steam collision load device, and the wet steam is distributed annularly and uniformly in the wet steam distribution region; then the wet steam which is distributed annularly and uniformly flows into a collision region for collision, and the randomness of the track of collided liquid drops accelerates the condensation of liquid drops, so that the diameters of the liquid drops increase dramatically, fall off under the effect of gravity, and are collected by a water draining device from an outlet in the lower end; the rest liquid drops flow upward along with air flows, and the sizes of the rest liquid drops increase continuously in the flowing process, and the rest liquid drops finally flow into a cyclone separation device connected with a diffuser pipe, and the final steam-liquid separation is carried out under the centrifugal force effect. The method disclosed by the invention is high in separation effect, stable in separation efficiency under variable working conditions, and low in flowing resistance.

Description

technical field [0001] The invention belongs to the technical field of power engineering, in particular to a steam-liquid separation method for steam turbine wet steam. Background technique [0002] The currently widely used steam-water separation process is mainly the combination of corrugated plate separator and rotary vane separator or cyclone separator. The wet steam is pre-separated through the rotary vane separator or cyclone separator first, and the two-phase fluid then flows into the corrugated plate separator. The fluid is attached to the corrugated plate and trapped during the flow process, and the dry steam then flows out of the corrugated plate separator. Optical measurements of the steam entering the separator showed that most of the water droplets reaching the separator were greater than 10 microns in diameter. The existing separation can achieve efficient separation of droplets at this particle size scale, but the separation efficiency of pre-separation is no...

AI Technical Summary

Problems solved by technology

The existing separation can achieve efficient separation of droplets at this particle size scale, but the separation efficiency of pre-separation is not high, and the pressure drop is large. The corrugated plate separator needs a large number of steel corrugated plates, which consumes a lot of steel. , the structure is relatively complex, prone to corrosion, and there are also problems such as large flow resistance and local speed prone to overspeed

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