CN205549900U - Novel efficient demister - Google Patents

Abstract

A new high-efficiency demister device belongs to the technical field of chemical equipment, including a cylinder body, the bottom of the cylinder body is an air inlet, and the top of the cylinder body is an air outlet. The inside of the cylinder body is provided with a demister, and the demister Both upper and lower are equipped with a flushing system; the shape of the blades of the demister is a folded plate structure, and the joints of the folded plates are set with rounded corners. The utility model can effectively improve the ability of removing small droplets, reduce the pressure drop of the demister, and improve the demisting efficiency of the demister, which can reach more than 99%.

Description

New high-efficiency demister

technical field

The utility model belongs to the technical field of chemical equipment, in particular to a novel high-efficiency demister.

Background technique

Mist eliminator is an important equipment of wet flue gas desulfurization system. The flue gas treated by the desulfurization absorption tower entrains a large number of slurry droplets, especially with the continuous increase of the flue gas flow rate of the current absorption tower, the amount of liquid droplets carried by the flue gas will increase, forming a particle size of 10 to 60 microns ""fog","fog" not only contains water, it also dissolves sulfuric acid, sulfate, SO ₂ and so on. If these droplets are not removed, the slurry will deposit on the surface of the fan, heat exchanger and flue downstream of the absorption tower, forming gypsum scale, staining and severely corroding the equipment, and affecting the heat transfer of the flue gas reheater. If the wet discharge process is adopted, it will cause "rainfall" in the chimney, which is actually to discharge SO2 into the atmosphere and pollute the surrounding environment of the power plant. Therefore, the wet desulfurization process requires demisting of the absorption equipment, and the purified gas must be demisted before leaving the absorption tower. The performance of the mist eliminator not only directly affects the determination of the flue gas flow rate in the absorption tower, but also affects the reliability of the wet FGD system.

Traditional demisters are prone to clogging problems, and the blades must be thoroughly cleaned every once in a while. Every time the traditional demister is blocked, the demisting efficiency will be seriously reduced. The exhaust gas containing "fog" will not only easily cause "gypsum rain" Pollution of the factory environment, or even shutdown of the entire workshop, not only brings huge economic losses to the company, but also seriously pollutes the environment.

Therefore, it is necessary to improve the mist removal efficiency of the mist eliminator and the ability to remove small droplets, and reduce the pressure drop of the mist eliminator.

Contents of the invention

The purpose of the utility model is to provide a new high-efficiency demister that can improve the demister efficiency and the ability to remove small liquid droplets, and reduce the pressure drop.

Based on the above purpose, the utility model adopts the following technical scheme: a new high-efficiency demisting device, including a cylinder, the bottom of the cylinder is an air inlet, the top of the cylinder is an air outlet, and the inside of the cylinder is provided with a demister, The upper and lower parts of the demister are equipped with a flushing system; the shape of the blades of the demister is a folded plate structure, and the joints of the folded plates are set with rounded corners.

The demisters are arranged in two stages, the blade spacing of the first demister is 30-50mm; the blade spacing of the second demister is 25-30mm.

The number of channels of the demister is 2-3.

Compared with the prior art, the technical effect of the utility model is:

1. The blades of the demister adopt a folded plate structure, and the joints of the folded plates are designed with rounded corners. Compared with the use of sharp corners, it can greatly reduce the secondary water and blockage of the collected droplets possibility of

2. This device adopts two-stage arrangement, the first stage demister is the main working unit, and the second stage demister is required to improve the ability to remove small droplets as much as possible, so the distance between the first stage demister blades 30-50mm; the blade spacing of the second-stage mist eliminator is 25-30mm;

3. Add a flushing system to regularly clean the demister blades to keep the demister blades clean and moist at the same time, which is more conducive to improving the demister effect of the demister.

4. The utility model has simple structure and high defogging efficiency, which can reach more than 99%.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the working state of the mist eliminator of the present invention.

detailed description

The new high-efficiency defogging device shown in Figures 1 and 2 includes a cylinder body 1, the bottom of the cylinder body 1 is an air inlet 2, the top of the cylinder body 1 is an air outlet 3, and the inside of the cylinder body 1 is provided with a demister 4 , the number of channels of the demister is 2, and the upper and lower parts of the demister 4 are equipped with a flushing system 5; the shape of the blade 6 of the demister 4 is a folded plate structure, and the joints of the folded plates are rounded set up.

The mist eliminator adopts two-stage arrangement, the distance between the blades 6 of the first-stage mist eliminator 41 is 30-50 mm; the distance between the blades 6 of the second-stage mist eliminator 42 is 25-30 mm.

Its working process is as follows: the flue gas containing mist droplets first passes through the first-stage mist eliminator 41 through the air inlet, most of the mist is removed, and the flue gas containing small droplets continues upward, and after passing through the second-stage mist eliminator 42, The distance between the blades is reduced, further removing small droplets in the flue gas, and the demisting efficiency is high. Moreover, the added flushing system 5 can regularly clean the blades of the demister, so as to keep the blades of the demister clean and keep the blades in a moist state, which is more conducive to improving the demisting effect of the demister.

Claims (3)

1. The most new and effective demister, including cylinder, the bottom of cylinder is air inlet, and the top of cylinder is gas outlet, it is characterised in that described inner barrel is provided with demister, and the upper and lower of described demister is equipped with flushing system；The blade shape of described demister is folding shape plate structure, and the junction of folding shape plate is that fillet is arranged.
2. New and effective demister the most as claimed in claim 1, it is characterised in that described demister uses two stage arrangement, and the blade pitgh of first order demister is 30～50mm；The blade pitgh of second level demister is 25～30mm.
3. New and effective demister the most as claimed in claim 2, it is characterised in that the port number of described demister is 2～3.