CN202590581U

CN202590581U - Defogger adapted to changes in gas flow

Info

Publication number: CN202590581U
Application number: CN 201220229965
Authority: CN
Inventors: 黄盛珠
Original assignee: 黄盛珠
Priority date: 2012-05-22
Filing date: 2012-05-22
Publication date: 2012-12-12
Anticipated expiration: 2022-05-22

Abstract

The utility model relates to a defogger adapted to changes in gas flow, which comprises an absorbing tower, a partition plate, defogging pipes and gas baffles, and is characterized in that the absorbing tower is a vertical absorbing tower, and is divided into an upper gas chamber and a lower gas chamber by the partition plate; and the defogging pipes distributed around the absorbing tower are respectively connected with the upper and lower gas chambers, and part of the defogging pipes are provided with the gas baffles. The gas in the vertical absorbing chamber flows from bottom to top or from top to bottom. The angle alpha between the defogging pipes and the upper gas chamber when the defogging pipes are connected with the upper gas chamber is minus 15 degrees to 45 degrees, and the angle beta between the defogging pipes and the lower gas chamber when the defogging pipes are connected with the lower gas chamber is 0 to 60 degrees, the channel number is 1 to 3, and each defogging pipe can also be formed by a continuous elbow. The defogging pipes can be provided with or not provided with flushing nozzles in accordance with the actual situation of the project. The number of the gas baffles is 50 to 75% of that of the defogging pipes. The adapted gas flow can reach 25% of the designed flow. The defogger provided by the utility model has stable defogging efficiency and reliable work, and is particularly applicable to places in which the gas flow can be substantially changed.

Description

A kind of demister that adapts to the gas flow variation

Technical field

The utility model relates to a kind of demister, particularly a kind of demister that adapts to the gas flow variation.

Background technology

Gas-liquid reaction equipment in the chemical field is usually used demister, and common type has mesh mist eliminator, deflection plate demister and eddy flow plate demister etc.In the coal-fired plant flue gas sulfur removal technology, widely used limestone/lime-gypsum wet method spray sulfur removal technology, demister is a key equipment, its performance directly has influence on the availability of desulphurization system.

The most deflection plate demisters of being made by RPP that adopt of big-and-middle-sized spray column, blade pitgh commonly used is at 30～50mm.This demister can only be applicable to certain gas velocity, generally is selected in 3.5～5.5m/s.Too high gas velocity causes secondary band water serious, the demist deleterious.Higher gas velocity also possibly blow afloat demister and damage.And low excessively gas velocity is unfavorable for gas-liquid separation, makes the demist deleterious equally.Need a large amount of fresh water (FW)s to wash during the operation of deflection plate demister, otherwise cause obstruction, cause faults such as gas pressure drop increase, demister cave in then.The actual motion effect of deflection plate demister is usually also bad, main cause have flooding nozzle often stop up, do not flush position, flushing blanking time long, washing water quantity is not enough, operational management is not in place etc.

Because the variation of boiler load, the gas flow through desulphurization system also can change, and this will cause very big threat to safe, reliable, the economical operation of demister.

The utility model content

The purpose of the utility model is to overcome the deficiency that existing deflection plate demister can not adapt to the gas flow wide variation, and a kind of demister that adapts to gas flow variation, demist stabilised efficiency, flooding nozzle, reliable operation can be set is provided.

A kind of demister that adapts to the gas flow variation of the utility model; Comprise absorption tower, dividing plate, demist pipe and gas baffle; It is characterized in that the absorption tower is vertical absorption tower; Dividing plate is divided into two parts air chamber up and down with the absorption tower, is distributed in absorption tower many eliminations mist pipe all around and connects lower chamber respectively; The demist pipe of part is provided with gas baffle.

The gas flow on described vertical absorption tower is bottom-up, also can be for from up to down.

Described demist pipe connects the angle of upper chamber αBe-15～45 °, connect the angle of lower chamber βIt is 0～60 °.(see in the accompanying drawing 2 α, βThe angle)

Described demist tube passage number can be 1～3.

Described demist pipe can be made up of a continuous U-shaped elbow.

Described gas baffle quantity is 50～75% of demist pipe quantity, and therefore adaptable gas flow can reach 25% of design discharge.

The diameter of every elimination mist pipe need be confirmed through detailed technical economic analysis according to concrete engineering actual conditions.Gas flow rate in every elimination mist pipe is recommended as 15～25m/s, and diameter is 300～600mm.

Because demist pipe diameter is big, the droplet under removing forms liquid film and flows downward, and the demist pipe itself is had from flushing action.Therefore, when the concentration of solid particles of slurries hour, flooding nozzle and associated pipe can be set.Only the concentration of solid particles at slurries big, when solid particle deposits easily, flooding nozzle and associated pipe are set.

The beneficial effect of the utility model is:

The physical dimension of demister designs according to 100% gas flow.When gas flow reduces, close gas baffle one by one, guarantee that the gas flow rate in each demist pipe does not take place to change significantly, thereby guaranteed the good fog effect that removes.When gas flow raises, for example reach 110% gas flow, the influence that causes is to remove fog effect to raise, gas pressure drop raises simultaneously, but the safe operation of demister is not constituted a threat to.

Description of drawings

Fig. 1 is the vertical section structure sketch map of the utility model embodiment 1.

Fig. 2 is the vertical section structure sketch map of the utility model embodiment 2.

Fig. 3 is the vertical section structure sketch map of the utility model embodiment 4.

Fig. 4 is the vertical section structure sketch map of the utility model embodiment 5.

Among the figure: 1, absorption tower; 2, dividing plate; 3, upper chamber; 4, lower chamber; 5, demist pipe; 6, gas baffle; 7, flooding nozzle.

The specific embodiment

Below in conjunction with accompanying drawing and specific embodiment the utility model is done further to set forth in detail.

Embodiment 1: as shown in Figure 1, this demister is provided with 8 elimination mist pipes 5 and is uniformly distributed in around the absorption tower 1, and gas baffle 6 is 4, and adaptable gas flow is about 50% of design discharge.Demist pipe 5 adopts the single channel structure.Demist pipe 5 connects the angle of upper chamber 3 αBe 45 °, connect the angle of lower chamber 4 βIt is 45 °.Flooding nozzle 7 is not set in the demist pipe 5.

When gas flow during, needn't close any gas baffle 6 greater than 93.75% design discharge.When gas flow is 81.25～93.75% design discharge, close 1 gas baffle 6.When gas flow is 68.75～81.25% design discharge, close 2 gas baffles 6.When gas flow is 56.25～68.75% design discharge, close 3 gas baffles 6.When gas flow is 43.75～56.25% design discharge, close 4 whole gas baffles 6.

Embodiment 2: as shown in Figure 2, the number of channels of demist pipe 5 is 2.Demist pipe 5 connects the angle of upper chamber 3 αIt is 10 °.Flooding nozzle 7 is set in the demist pipe 5.All the other and embodiment 1 are basic identical.

Embodiment 3: demist pipe 5 connects the angle of upper chamber 3 αIt is 0 °.All the other and embodiment 2 are basic identical.

Embodiment 4: as shown in Figure 3, the number of channels of demist pipe 5 is 3.All the other and embodiment 1 are basic identical.

Embodiment 5: as shown in Figure 4, demist pipe 5 is made up of a continuous U-shaped elbow, and demist pipe 5 connects the angle of upper chamber 3 αBe 0 °, connect the angle of lower chamber 4 βIt is 0 °.All the other and embodiment 1 are basic identical.

Claims

1. one kind can adapt to the demister that gas flow changes; Comprise absorption tower, dividing plate, demist pipe and gas baffle; It is characterized in that: the absorption tower is vertical absorption tower, and dividing plate is divided into two parts air chamber up and down with the absorption tower, is distributed in absorption tower many eliminations mist pipe all around and connects lower chamber respectively; The demist pipe of part is provided with gas baffle.

2. a kind of demister that gas flow changes that adapts to according to claim 1, it is characterized in that: the gas flow on described vertical absorption tower is bottom-up, also can be for from up to down.

3. a kind of demister that gas flow changes that adapts to according to claim 1, it is characterized in that: described demist pipe connects the angle of upper chamber αBe-15～45 °, connect the angle of lower chamber βBe 0～60 °, port number is 1～3.

4. according to each described a kind of demister that gas flow changes that adapts to of claim 1～3, it is characterized in that: described gas baffle quantity is 50～75% of demist pipe quantity.