CN204767850U

CN204767850U - Manifold type defroster

Info

Publication number: CN204767850U
Application number: CN201520502643.6U
Authority: CN
Inventors: 刘奕琳; 于敦喜; 蒋京楷; 徐明厚
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2015-07-13
Filing date: 2015-07-13
Publication date: 2015-11-18
Anticipated expiration: 2025-07-13

Abstract

The utility model discloses a manifold type defroster, including a plurality of baffling board blades, multiunit pipe tube nest and two backup pads, a plurality of baffling board blades are installed side by side between two backup pads, and the pipe tube nest that a set of stagger arrangement was discharged is laid at least to cavity formation defogging passageway between double -phase neighbour's the baffling board blade in each defogging passageway. The utility model discloses inside flow field receives the coupling of pipe tube nest and baffling plate structure simultaneously among the manifold type defroster, can effectively improve the separation efficiency of defroster under different work condition, and the influence that separation efficiency is changed by the operating mode is less.

Description

A kind of manifold type demister

Technical field

The utility model belongs to flue gases purification field, more specifically, relates to a kind of manifold type demister, for the gas cleaning in wet flue gas desulfurization tower or in horizontal flue.

Background technology

Along with country is to environmental protection pay attention to day by day, to power plant SO ₂emission control increasingly stringent, most domestic power plant has installed desulfurizer all.Wherein, a kind of typical sulfur removal technology is wet fuel gas desulfurizing technology, adopts spraying technique smoke treatment.Treated flue gas can carry gypsum droplet, needs to install demister in desulfurizing tower exit to reduce the carrying amount of gypsum droplet in flue gas with purifying smoke.

The baffle type mist eliminator of single structure is generally used in current power plant wet desulfurization system, its demisting efficiency is subject to the impact of the working condition such as flue gas flow rate, mist droplet particle size change comparatively greatly, and under the operating mode that gas speed is lower or mist droplet particle size is less, demisting efficiency is on the low side.

Utility model content

For the defect that prior art exists, the utility model provides a kind of manifold type demister, its object is to the demist effect of effectively comprehensive deflection plate and pipe two kinds of structures, solve the demister technical problem that under the lower or less operating mode of mist droplet particle size, during demisting efficiency on the low side and variable working condition, demisting efficiency fluctuation is larger in gas speed thus.

A kind of manifold type demister, comprise multiple deflection plate blade, many group pipe tube bundles and two pieces of gripper shoes, multiple deflection plate blade is installed between two pieces of gripper shoes side by side, cavity between two adjacent baffle blades forms a demist baffling passage, at least one group of pipe tube bundle is laid in each demist baffling passage, the many rows pipe stagger arrangement forming pipe tube bundle is placed, pipe axially with demist baffling channel axis to vertical.

Described pipe tube bundle can be arranged in the optional position of demist passage between deflection plate blade, pipe axially with demist baffling channel axis to vertical, specifically, pipe axis and deflection plate axes normal, parallel with deflection plate wall.The pipe tube bundle of single group or the different row of many groups can be arranged in same demist passage.The diameter of pipe is not less than the tube pitch with row's pipe, pipe is arranged compact, improves " rapidsization " effect of tube bundle stream field, and flows out the collision probability of drop after increasing between row's pipe and front comb, and then improve demisting efficiency.

Described multiple deflection plate blade equidistantly arranges, incoming flow flue gas is shunted, makes the exhaust gas volumn of the process of each demist passage substantially identical, and guarantee that the fog removal performance of deflection plate in each demisting unit is basically identical, give full play to the demist ability of each demisting unit, improve the entirety of device except fog effect.Described deflection plate blade template is any one in the deflection plate of trapezoidal folding shape plate, triangle folding shape plate, corrugated sheet, arc, band barb.

For increasing tube bundle at the interlobate constant intensity of deflection plate, the fixed connecting piece of pipe and flap can be set up at the different length place of tube bundle.

In general, the above technical scheme conceived by the utility model compared with prior art, owing to adopting above-mentioned pipe and flap manifold type structure, can obtain following beneficial effect.Deflection plate blade spatially horizontally especially equidistantly arranges, and can shunt incoming flow flue gas, and what give full play to each demisting unit removes fog effect.Blade in each bending channel and tube bundle form a demisting unit, in each demisting unit, pipe wrong row in the space of demist passage is gathered, change the flow behavior of curved channel flow field, and change the spatial characteristics of drop in flow field, actively impact is produced on the fog removal performance of deflection plate; Meanwhile, the deviation effect of deflection plate stream field also can affect the flow field characteristic around pipe tube bundle, changes the demisting characteristic of pipe tube bundle, and can assist the droplet removing and be difficult to be trapped by tube bundle.Therefore, the manifold type demister that the utility model provides all has higher demisting efficiency under the operating mode of different flue gas flow rate and mist droplet particle size, and demisting efficiency affects very little by working conditions change.

Accompanying drawing explanation

Fig. 1 is the three-dimensional structure schematic diagram of a kind of manifold type demister in specific embodiment;

Fig. 2 is the two-dimensional structure schematic diagram of a kind of manifold type demister in specific embodiment.

Fig. 3 is the front view of single suspension arrangement in a kind of manifold type demister in specific embodiment.

Reference numeral represents: 1 deflection plate blade; 2 pipe tube bundles; 3 gripper shoes.

Detailed description of the invention

In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.In addition, if below in described each embodiment of the utility model involved technical characteristic do not form conflict each other and just can mutually combine.

Refer to Fig. 1, Fig. 2 and Fig. 3, Fig. 1 is the three-dimensional structure schematic diagram of a kind of manifold type demister described in specific embodiment; Fig. 2 is the two-dimensional structure schematic diagram of a kind of manifold type demister described in specific embodiment; Fig. 3 is the structural front view of suspension arrangement single in manifold type demister described in specific embodiment.

The pipe tube bundle 1 that the utility model provides a kind of manifold type demister structure to comprise deflection plate blade 2, equidistantly wrong row and gripper shoe 3.Pipe tube bundle 1 is placed on demist channel interior, the axis of pipe tube bundle 1 and the axial vertical of blade.Blade in each bending channel and tube bundle form a demisting unit.

The spacing of middle deflection plate blade 2 embodiment illustrated in fig. 3 is 30mm, and in each demisting unit, the row of staggered round tube tube bundle 1 is 2, and pipe diameter is 4mm.Tube bundle is placed on the entrance of each demist passage, and blade and tube bundle are all fixed on supported on both sides plate, and flue gas flows into manifold type demister along deflection plate blade, first flows through the blade inlet section of band tube bundle, then enters follow-up bending section.

So, the manifold type demister coupling that the utility model provides utilizes deflection plate and pipe tube bundle two kinds of structures, makes it to influence each other, have complementary advantages to improve integrally-built demisting efficiency.Flow field characteristic in each demisting unit, by pipe tube bundle and baffle arrangement joint effect, improves the fog removal performance of each minor structure.Contrast the demisting efficiency of manifold type demister and the chevron mist eliminator of identical folded structure, the circular pipe type demister of same pipe clustering architecture under different operating mode by the method for numerical simulation, result is as shown in table 1.Contrast finds that the demisting efficiency of manifold type demister is all higher than the demister of single structure, and when especially lower at flue gas flow rate, mist droplet particle size is less, efficiency difference is maximum; And the demisting efficiency of manifold type demister is less by the impact of working conditions change.

Table 1

It should be noted that, the template of demister blade is not limited to trapezoidal deflection plate, also can select the one in the deflection plate of triangle folding shape plate, corrugated sheet, arc, band barb.Further, deflection plate blade pitgh is not limited to 30mm, can set according to actual conditions.

Separately it should be noted that, in manifold type demister, the pipe tube bundle of each demisting unit is not limited to and is placed on entrance, can place many group pipe tube bundles at the diverse location of passage; The row often organizing pipe tube bundle is not limited to two rows, can require to change row according to actual motion; Meanwhile, the diameter of pipe is not limited to 4mm, can require the diameter changing pipe according to demister blade pitgh and demist.The diameter of pipe is not less than the tube pitch with row's pipe, thus except fog effect is better.

Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.

Claims

1. a manifold type demister, it is characterized in that, comprise multiple deflection plate blade, many group pipe tube bundles and two pieces of gripper shoes, multiple deflection plate blade is installed between two pieces of gripper shoes side by side, cavity between two adjacent baffle blades forms a demist baffling passage, lay at least one group of pipe tube bundle in each demist baffling passage, the many rows pipe stagger arrangement forming pipe tube bundle is placed, pipe axially with demist baffling channel axis to vertical.

2. manifold type demister according to claim 1, is characterized in that, the diameter of described pipe is not less than the tube pitch with row's pipe.

3. manifold type demister according to claim 1, is characterized in that, described multiple deflection plate blade equidistantly arranges.

4. the manifold type demister according to claim 1 or 2 or 3, is characterized in that, described deflection plate blade template is any one in the deflection plate of trapezoidal folding shape plate, triangle folding shape plate, corrugated sheet, arc, band barb.

5. the manifold type demister according to claim 1 or 2 or 3, is characterized in that, also comprise the fixed connecting piece be arranged between pipe and deflection plate blade.