CN88203740U

CN88203740U - High efficient wet dust cleaner

Info

Publication number: CN88203740U
Application number: CN 88203740
Authority: CN
Inventors: 何星
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-02-26
Filing date: 1988-02-26
Publication date: 1988-11-30

Abstract

The utility model relates to a high efficient wet dust cleaner, which is mainly composed of a straight-way type swirler in which a central tube is arranged, a grid, a granular layer, a spraying system and an air-water separator. The high efficient wet dust cleaner combines various dust collection principles into integration, and can solve the purifying problem of the high concentration dusty flue gas. The highest dust concentration of the disposable flue gas can reach 35000 mg/nm+[3]; the dust collection efficiency reaches more than 99%; the high efficient wet dust cleaner is especially suitable for the flue gas cleaning of the fluidized combustion boiler and the powder spraying combustion boiler, and can also be used for the flue gas cleaning equipment in other coal-fired boilers and industrial furnaces.

Description

High efficient wet dust cleaner

The utility model relates to a kind of device that separates dispersed granules with liquid as release agent from flue gas.

The boiler that can be fuel at present with the colm has fluidized bed combustion boiler and the burning boiler that dusts, but the dust contained flue gas concentration of these two kinds of boiler emissions is big especially, reaches 20000～40000mg/Nm ³, problem of environmental pollution is outstanding, and must be equipped with high efficiency smoke eliminator can use.Existing boiler divides two kinds of dry type and wet types with smoke eliminator, owing to wet scrubber has reduced investment, advantage effective, that do not produce reentrainment of dust and have desulfurization concurrently obtains comparatively general use.Wet scrubber mainly contains following several types: 1, impingement washing scrubber; 2, liquid net (pearl) scrubber; 3, pipe type water film deduster; 4, cyclone type water dust scrubber; 5, Venturi tube scrubber etc.First three kind deduster efficiency of dust collection is lower, generally about 85%, is only applicable to the smoke treatment dust content less than 2000mg/Nm ³Laminar burning miniature boiler.Venturi tube scrubber efficiency of dust collection can reach more than 98%, but dust remover resistance is big, and the operating cost height is only applicable to and the supporting use of large-sized boiler.What general boiler use was more is the cyclone type water dust scrubber, and efficiency of dust collection can reach about 90%.In dust contained flue gas concentration less than 3000mg/Nm ³Situation under result of use better, but concerning high its ten times the fluidized bed combustion boiler of dust contained flue gas concentration and the burning boiler that dusts, only can not reach standard limit of smog release by primary dust removing, often need to dispose multistage rotary dust collector.

Task of the present utility model provides a kind of high efficiency wet scrubber, so that just can make the flue gas of high concentration reach the requirement of purification by primary dust removing.

The utility model takes following measure to realize: the housing of deduster is made up of upper and lower two different hollow circular cylinders of diameter, and the top column diameter connects with falling to cut the Cone body between the two greater than the bottom cylinder.Housing is made with acid-resistant stainless steel, or uses common steel shell, and liner is with the heatproof anticorrosive material, and also available granite is built into.The central tube that is provided with top seal in the cylinder of deduster bottom constitutes the through type cyclone, inserts in the water seal tank at the bottom of the cyclone.Air inlet pipe is positioned at the cyclone bottom, downward-sloping certain angle.Deduster middle part is provided with grid, has a certain thickness stratum granulosum by what glass marble was formed above the grid.Deduster top is provided with the spray system of being made up of mother's pipe, shower nozzle and the spray line of stainless steel.At dust remover roof U-shaped tubular type moisture separator is set, purified gas is discharged from the separator end.

Because this deduster has been used multiple dust-cleaning principle and has been designed, thereby also can reach very high efficiency of dust collection under the king-sized situation of dust contained flue gas concentration.The highest dust content of the accessible flue gas of this deduster is 35000mg/Nm ³, efficiency of dust collection reaches more than 99%, is specially adapted to fluidized bed combustion boiler and the high concentration gas cleaning of the burning boiler that dusts, and also can be used as the flue gas purifying equipment of other coal-burning boilers and Industrial Stoves.

Below in conjunction with accompanying drawing principle of the present utility model and structure are further described.

Fig. 1 is the structural representation of this deduster;

Fig. 2 is cell structure figure;

Fig. 3 is the spray system structure chart.

Ash-laden gas enters through type cyclone (2) from the air inlet pipe (3) of deduster, and a central tube that vertically runs through cyclone is arranged in the cyclone (2), and its top is sealing De Yuan Cone body, and central tube is made with stainless steel.Air inlet pipe (3) is the bottom that tangential direction is connected cyclone (2), and downward-sloping certain angle, and its center line and horizontal angle can be 10 °～45 °.Water seal tank (8) is inserted in the bottom of cyclone (2), and elevation of water is consistent with the bottom of air inlet pipe (3).Flue gas enters the directly bump water surface of back, the thick grit of part is absorbed by water, all the other flue gases rotate diffusion from bottom to top around central tube, grit gets rid of barrel to cyclone by action of centrifugal force, because the up big and down small structure of housing (1) diameter, make on cyclone (2) wall to form the good moisture film of one deck, not only helped the capture of dust but also the wearing and tearing that can alleviate wall.Flue gas continue upwards by the grid (4) that is held on the deduster middle part and on stratum granulosum (5), grid (4) is formed by the stainless steel substrates setting-in, the gap is 12～20mm.Stratum granulosum (5) is made up of the glass marble of 16～25mm, and the visual flue gas flow of thickness of bed layer, concentration adjustment enter the fluid bed state when making flue gas by stratum granulosum.Grit at this constantly by bead interception, collision, and contact with the moisture film on bead surface and condense, sedimentation.Be provided with spray system (6) on deduster top, it is made up of mother's pipe and 3～5 layers of horizontally disposed, staggered spray line, and female pipe bottom is connected to cellular shower nozzle.Flue gas obtains further spray washing at this.Flue gas after being purified is at last by being located at the U-shaped tubular type moisture separator (7) of dust remover roof.This is a pipe that is horizontally placed on dust remover roof, makes with stainless steel tube, has elongated window at its top.Water smoke is blocked by the tube wall of pipe bottom, and gas enters from elongated window, discharges through the end of separator.Dust enters ash settling basin (11) with current by the overfall on the water seal tank (8), and through precipitation process, plaster can be delivered to storage ash field with slurry pump (10) at this, and primary water available cycles pump (9) returns spray system and uses.

By on the fluidized bed combustion boiler of 8t/h, using the test of this deduster to show, when dust contained flue gas concentration is 24042～36981mg/Nm ³The time, efficiency of dust collection reaches 99.2～99.7%, and smoke emissioning concentration is less than 200mg/Nm ³, lingemann blackness is less than 1 grade, and desulfurization degree is more than 50%.

Claims

1, a kind of wet scrubber of being made up of housing (1), cyclone (2), air inlet pipe (3), grid (4), stratum granulosum (5), spray system (6), moisture separator (7), water seal tank (8) is characterized in that:

A, housing (1) are made up of upper and lower two different hollow circular cylinders of diameter, and the top column diameter is greater than the bottom cylinder, between the two with the connection of falling the truncated cone;

B, air inlet pipe (3) are positioned at the bottom of cyclone (2) and downward-sloping;

Water seal tank (8) is inserted in the bottom of c, cyclone (2), and elevation of water is consistent with the bottom of air inlet pipe (3);

Establish the stainless steel central tube that vertically runs through cyclone in d, the cyclone (2), the central tube top is the cone of sealing;

E, grid (4) are formed by the stainless steel substrates setting-in;

F, spray system (6) are made up of mother's pipe, shower nozzle and the spray line of stainless steel;

G, moisture separator (7) are U-shaped tubular type moisture separator, make with stainless steel tube, have elongated window at its top.

2, deduster according to claim 1 is characterized in that the center line of air inlet pipe (3) and horizontal line angle are 10 °～45 °.

3, deduster according to claim 1, the gap that it is characterized in that grid (4) is 12～20mm.

4, deduster according to claim 1, the glass marble diameter that it is characterized in that stratum granulosum (5) is 16～25mm.

5, deduster according to claim 1 is characterized in that the spray line of spray system (6) can be established 3～5 layers, and horizontally disposed, be staggered.

6, according to claim 1 or 2 or 3 or 4 or 5 described dedusters, it is characterized in that housing (1) makes with acid-resistant stainless steel, also available common steel shell, liner is built into the heatproof anticorrosive material or with granite.