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Defroster

A demister and blade technology, applied in the field of gas-liquid separation equipment, can solve the problems of demisting efficiency drop, secondary entrainment, high cost, etc.

Inactive Publication Date: 2008-07-02
SHANGHAI HUOLIN ENG PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] like figure 1 The horizontal type mist eliminator shown is simple in structure, but its disadvantage is that when the flue gas flow rate is high, secondary entrainment is easy to occur, resulting in a decrease in mist removal efficiency
[0010] but figure 2 The deficiencies of the demister shown are: complex structure, inconvenient installation and maintenance operations, and high cost
Moreover, because the flue gas flow rate in the desulfurization tower is uneven, there may still be points with higher flue gas flow rates in some parts, so the herringbone demister also has the phenomenon of secondary entrainment, and the secondary entrainment phenomenon is inevitable and can only be reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] like Figure 4 As shown, the defogging unit 3 is a plurality of rows of circular blades 31 . Multiple rows of circular blades 31 are arranged in parallel to form the defogging unit 3 .

[0119] The circular defogging units 3 are arranged in a row on the section AA of the flue gas direction 5 . When the flue gas with liquid droplets passes through the lower half of the circular blade 311, due to the deflection of the streamline, the gas-liquid separation is realized under the action of inertial force, and some of the liquid droplets hit the blade and are captured. Equivalent to the role of a primary demister.

[0120] The remaining flue gas containing liquid droplets with smaller particle sizes passes through the upper half annular blade 312 for gas-liquid separation again, and the blade 31 is fixed by the fixing unit 2 .

[0121] A flushing water pipe 11 is arranged above the central point of the defogging unit blades 31, and nozzles (not shown) are evenly arranged d...

Embodiment 2

[0126] like Figure 5 As shown, the blade 31 of the defogging unit 3 includes an upper half blade 312 and a lower half blade 311 . Wherein the upper half blade 312 and the lower half blade 311 are formed by two sections of arcs with the same curvature respectively, so that the blades have the same cross section in the vertical direction, so as to ensure that the airflow has the same resistance in the vertical direction; The lower half of the blade is composed of two arcs with the same curvature.

[0127] The fixed unit 2 adopts a slot-type card structure.

[0128] like Image 6 As shown, since the lower half blade 311 has a smaller height h 2 and larger blade spacing d 2 , can remove larger particle size droplets, which is equivalent to the role of a coarse demister, and these droplets account for most of the droplets in the flue gas.

[0129] The upper half blade 312 has a greater thickness h 1 , blade spacing d 1 It is denser and can remove droplets with smaller parti...

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Abstract

The invention provides a defogger which comprises a cleaning unit which is used for cleaning the defogger, a defogging unit which is used for separating air and liquid, a fixing unit which is used for fixing the defogging unit, wherein, the defogging unit is an array or a plurality of arrays of blades, and the blade takes an annular shape. The defogger of the invention reduces secondary entrainment and improves defogging efficiency; meanwhile, the defogger has simple structure and convenient installation, maintenance and operation.

Description

technical field [0001] The invention relates to gas-liquid separation equipment, in particular to a mist eliminator. Background technique [0002] There are many types of demisters, but there are roughly three types of demisters based on centrifugal force, namely baffle plate demisters, swirl plate demisters and pressure demisters. In the traditional desulfurization process, a baffle demister is used. [0003] like image 3 As shown, the working principle of the baffle demister is: when the flue gas with liquid droplets enters the channel of the demister, due to the deflection of the streamline, some of the droplets 4 hit the blades of the demister and are captured. Gas-liquid separation is realized under the action of inertial force. [0004] The layout forms of demisters usually include: horizontal type, herringbone type, combined type, etc. Large-scale desulfurization absorption towers mostly adopt herringbone layout, V-shaped layout or combined layout (such as rhombus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D45/08
Inventor 高梅杉
Owner SHANGHAI HUOLIN ENG PLASTICS
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