SU1411009A1 - Mechanical moisture separator - Google Patents

Abstract

The invention relates to the separation of two-phase systems and can be used in the power industry for the separation of two-phase working medium flows in turbine plants of power plants. The purpose of the invention is to improve separation by reducing re-entrainment of moisture. Making the catching device in the form of a package of truncated cones facing the inlet nozzle with smaller bases with annular transverse partitions and longitudinal channels made evenly on the inner surface of the walls of the truncated cones at an angle to their forming in the direction of the droplets from the blades of the separation wheel use the kinetic energy of the droplets flying from the impeller to transport them without re-crushing. The presence of a channel connecting the first along the gas separation chamber with the cavity of the outlet nozzle intensifies the removal of fluid from the zone most loaded with fluid. 1 il. and (L

Description

The invention relates to power engineering, for example, to wet steam turbines, and can be used to separate two-phase working medium flows in turbine plants of a power plant.

The purpose of the invention is to improve the generation by reducing the secondary entrainment of moisture.

The drawing shows the proposed: the owner of the divider.

The mechanical dehumidifier contains: case 1 with inlet 2 and outlet 3 Yusev nozzles, guiding the longest grille 4 fixed in the case 1, impeller 3 with radial blades 6 and hub 7 on axle 8. mounted in support bearings 9, fixed in the skirt 10 and 11. The outer wheel is concentric; there is a water collection chamber 12 with transitions in the form of a package of truncated cones 113-16. Between the cones there are transverse annular partitions 17, dividing the space between the cones into catching 18 and separating 9 chambers. The repair chambers are connected by channels 20 with a collection of 21 liquids (chambers).

The cavity between the first two truncated cones 13 and 14 behind the transverse partition 17 is connected by a channel formed by an opening 22, a cavity 23, an opening 24, a cavity 25 and an opening 26, and an outlet of the outlet 3. On the inner surface of the truncated cones 13-16 longitudinal grooves 27 located uniformly at an angle to the generators in the direction of (droplets from the wheel). On the outer surface, they are made concentrically |) in the circles of the groove 28. I The dehumidifier works as follows.

The housing 1 enters a two-phase medium, for example, wet steam, which, having passed the supply port 2 and the guide grate 4, enters the blades 6 of the wheel 5, driving it into rotation. The droplets of the liquid phase of the flow of the medium entering the separation wheel, when colliding with the radial blades 6, are partially captured in the field of centrifugal forces, and partially reflected. Drops moving under the action of inertial forces along the blade descend from it and move in the direction determined by the sum of the speeds: the main flow velocity along the axis of the separator, the speed in the direction from the wheel axis to its periphery and the circumferential speed wheels and tangentially to it.

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The particles of the liquid phase that are dropped on the periphery enter the trapping chambers 18. The kinetic energy produced by the particles of moisture on the wheel 5 is used in the longitudinal grooves. The liquid phase is discharged into separation chambers 19 used to collect condensate, and then drains through channel 20 into chamber 21 and condensate discharge pipe 29. The grooves 28 prevent the 14-16 drops flowing down the cones from falling into the flow part of the wheel, preventing them from entering the main flow. Since the pressure in the cavity of the outlet nozzle 3 is lower than in the catching chamber 18, the pressure drop arising during the operation of the separator contributes to a more vigorous removal of the liquid phase from the first most loaded moisture-collecting chamber 18.

Improvement in separation is achieved by maximizing the use of tangential forces acting on the droplets of the liquid phase in the channels and cells of the walls of the truncated cones. The implementation of catching and separating chambers in the form of a package of truncated cones in the body eliminates vortex formation in the catch chambers and the removal of fine moisture into the main stream, provides a developed sedimentation surface and drainage of fluid through the channels, which prevents drops from returning to the plane of rotation of the wheel.

The design of the separator allows the use of pressure drops before and after the separation wheel to intensify the moisture removal.

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Claims (1)

Invention Formula A mechanical dehumidifier, containing a housing with axial inlet and outlet nozzles, a guide blade, an impeller mounted on the central axis of the bearings and a moisture collecting chamber with annular partitions located outside the wheel, characterized in that in order to improve separation by reducing secondary entrainment of moisture, partition walls are pulped: in the form of a package of truncated cones, with a smaller base facing the inlet nozzle, with longitudinal grooves, it is located evenly on and the inner surface at an angle to the generatrix in the direction of exit from the wheel drops and ka.mera provided with transverse annular partitions mounted between the cones, the cavity between the first inlet of two truncated cones for the transverse partition in the upper part of the channel communicates with the outlet cavity. 12 go