Defoaming device of plate type falling film evaporator

Abstract

The invention discloses a defoaming device of a plate type falling film evaporator capable of enhancing vapor-liquid separation level and improving defoaming effect by rapidly reducing high-speed vapor streams. The defoaming device comprises an outer protective frame and a plurality of mutually parallel baffle plate damping vanes, wherein the plurality of mutually parallel baffle plate damping vanes are arranged in the outer protective frame; defoaming channels are formed among the baffle plate damping vanes; each baffle plate damping vane is bent into an inlet section, an outlet section and a bent section positioned between the inlet section and the outlet section and formed by bending the baffle plate damping vane for a plurality of times; and an exterior angle of the corner of the bent section is provided with an L-shaped fin used for obstructing the flow direction of steam. The invention has the advantages of being capable of rapidly reducing the vapor streams, obviously improving the defoaming effect, enhancing the defoaming efficiency and quality, preventing the effective components contained in secondary steam from being brought out and reducing the production cost.

Description

technical field [0001] The invention relates to a plate type falling film evaporator, in particular to a demister of the plate type falling film evaporator. Background technique [0002] Plate falling film evaporator is widely used in papermaking, chemical industry and other fields. Among them, the defoaming device is a device used in the plate falling film evaporator to separate the secondary steam and improve the cleanliness of the condensed water of the secondary steam. The defoaming device of the plate type falling film evaporator is generally installed in the separation chamber of the lower half of the shell of the plate evaporator, and is located between the shell and the heat exchange plate. The defoaming device divides the separation chamber into upper and lower parts. A secondary steam outlet is opened on the shell wall of the upper part of the chamber. The defoaming device is generally composed of an outer protective frame, a number of baffle damping blades arran...

AI Technical Summary

Problems solved by technology

Due to the unreasonable design of the baffles in the demister device of the existing plate evaporator, when the secondary steam passes through the defoaming channel, the number of collisions with the damping blades of the baffles is less, and because the surface of the damping blades of the baffles is smooth, High speed steam flow has poor deceleration effect, resulting in poor defoaming effect and increased production cost

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