CN2375370Y

CN2375370Y - Smoke desulfurizing dust remover

Info

Publication number: CN2375370Y
Application number: CN 98235207
Authority: CN
Inventors: 杨常明
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-24
Filing date: 1998-01-24
Publication date: 2000-04-26
Anticipated expiration: 2008-01-24

Abstract

The utility model relates to a smoke desulfurizing dust remover, which belongs to the technical field of smoke purification and environmental protection. The utility model comprises a washing tower; a venturi tube, a baffle device, a filter, a two-stage water nozzle, an alkali liquor pool, a demister, a smoke heating cavity, etc. are arranged in the center of the tower body. The utility model can carry out four-stage dust removing for smoke dust in the smoke, three-stage absorption for SO2 and SO3 and dryness and heating for wet smoke; thereby, the heat buoyancy in the air of the smoke can be increased; the inner corrosion etch back of a smoke conveying emptying device and a pipeline can be reduced. The utility model has advantages of high dust removing efficiency and desulfurizing efficiency, and the utility model can be used for desulfurizing and removing dust for the smoke of an industrial boiler and a kiln burning coal and oil.

Description

Desulfurating dust removing device for flue gas

The utility model relates to a kind of desulfurating dust removing device for flue gas, belongs to the environmental protection technical field of industrial flue gas cleaning, is specially adapted to the Industrial Boiler of fire coal, fuel oil and the flue gas desulfurization and dedusting at stove cellar for storing things.

Existing Industrial Boiler desulfurating dust removing device for flue gas has simple function, and so-called simple function is exactly or can only dedusting, or can only desulfurization (SO ₂, SO ₃).Existing Industrial Boiler desulfurating dust removing device for flue gas is multi-functional in addition, and what is called is multi-functional finishes desulfurization and dedusting exactly simultaneously in a device.Existing multi-functional desulfurating dust removing device for flue gas kind is quite a few, but finds to have following weak point through actual the use: one, all high this target of dedusting and desulfuration efficiency are difficult to realize, have plenty of the efficiency of dust collection height, and desulfuration efficiency are low; Have plenty of the desulfuration efficiency height, and efficiency of dust collection is low; It is low to have plenty of the both.Its two, flue gas after being purified not drying and heating just directly row reduced the heat buoyancy that flue gas spreads in the air in atmosphere, make flue gas in overhead not high sky diffusion, remaining SO on a small quantity in the flue gas ₂, SO ₃, H ₂SO ₃, H ₂SO ₄, NO _XPromptly returning ground with short grained dust pollutes.Low temperature in addition, also strengthened the equipment of carrying the emptying flue gas, the internal corrosion of managing logical and chimney, because can make flue gas condensing go out the acid aqueous solution of band.Its three, economy (equipment investment and operating cost) and the aspect such as manipulate unsatisfactory place is arranged.So above-mentioned deficiency has seriously restricted generally promoting the use of of existing multi function flue gas cleaner.

The purpose of this utility model is: be the shortcoming at above smoke eliminator, the infant industry desulfurating dust removing device for flue gas of a kind of classification dedusting and grading desulfurization is proposed, its desulfurization and efficiency of dust collection are all very high, and reduce the internal corrosion of carrying emptying flue gas equipment and pipeline.

The technical solution of the utility model is, it includes scrubbing tower, and Venturi tube, baffle means, filter, two-stage (operating) water nozzle, alkaline liquid pool, demister and flue gas heating chamber etc. are equipped with in the center in the tower body.Flue dust in the high-temperature flue gas is carried out the level Four dedusting, to SO ₂And SO ₃Three grades of absorptions through super-dry and heating, improve the heat buoyancy that flue gas spreads to wet flue gas aloft, have reduced the internal corrosion of carrying emptying flue gas equipment and pipeline.

It is as follows that the utility model is described in further detail in conjunction with the accompanying drawings and embodiments:

Fig. 1 is the desulfurating dust removing device for flue gas structural representation;

Fig. 2 is the baffle means structural representation.

Among Fig. 1: 1. baffle means; 2. shell (carbon steel, liner resistant material); 3. filter (acid-resistant stainless steel silk screen); 4. (operating) water nozzle; 5. (operating) water nozzle; 6. alkaline liquid pool; 7. demister (acid-resistant stainless steel silk screen); 8. high-temperature flue gas heating chamber; 9. Venturi tube; 10. gas approach; 11. emptying exhanst gas outlet; 12. smoke outlet tube; 13. alkalies import; 14. alkalies liquid head piece; 15. discard solution discharge port; 16. slag liquid floss hole; 17. ring-like pipe

As shown in Figure 1, a Venturi tube (9) is equipped with at the center of shell (2), in the trunnion upper end of Venturi tube (9) (operating) water nozzle is housed, and in the outlet lower end of Venturi tube (9) baffle means (1) is housed; In the middle and lower part of shell (2) filter (3) is housed, a ring-like pipe (17) is housed, 8～10 (operating) water nozzles are housed on this pipe on this filter top; In shell (2) middle and upper part one annular alkali lye pond (6) is housed, smoke outlet tube (12) is introduced in the alkali lye in this pond; A demister (7) is housed on smoke outlet tube.Between shell (2) top cover and demist (7) a flue gas heating chamber (8) is housed, this heating chamber is communicated with the upper end of Venturi tube (9).Device is for erectting, and shell (2) can be cylindrical shape, also the side's of can be bodily form.

High-temperature flue gas enters Venturi tube (9), washings (industrial fresh water or seawater) are by the trunnion top ejection of (operating) water nozzle (5) from Venturi tube (9), according to the Venturi-tube action principle, at the trunnion position, flue gas flow rate increases rapidly, and spray washing water atomizes at once, and gas, liquid and solid fully mix and fierce collision, solid flue dust and heat in the flue gas are taken away SO by water ₂And SO ₃Effectively absorbed by water smoke.Flue gas goes downstream, and runs into baffle means (1) and turns back 180 ° with the minimum pressure loss, flows to filter (3) equably, removes the dust in the flue gas in filter again.Flue gas is accepted the water smoke spray of (operating) water nozzle (4), the 4th dedusting by behind the filter (3).SO in the flue gas ₂, SO ₃Water smoke spray by under (operating) water nozzle (4) spray is absorbed for the second time by water.Down, flue gas imports in the alkaline liquid pool (7) through smoke outlet tube (12), under the alkalies effect, removes SO wherein for the third time ₂And SO ₃Wet flue gas continuation is upwards gone, and through demister (7), removes water droplet, dry and heating in flue gas heating chamber (8) again, and finally dried hot flue gas is arranged in the air through conveyance conduit and equipment.To sedimentation basin and neutralization pond, the clean neutral water after the processing can recycle use to washes from slag liquid floss hole (16) row.

The utility model has following characteristics:

1, flue gas process level Four dedusting: the first order is Venturi tube; The second level is to be sprayed by (operating) water nozzle (5) Water smoke washing; The third level is the filtration of filter (3); The fourth stage is by (operating) water nozzle (4) The water smoke washing of ejection. Flue gas is through three grades of desulfurization: the first order is the water of (operating) water nozzle (5) ejection Mist absorbs; The second level is the water smoke absorption by (operating) water nozzle (4) ejection; The third level is at alkalies Alkali liquor absorption in the pond (6). So desulfurization dust-removing efficiency is very high, below lingemann blackness 1 degree, Dust removal efficiency can reach 98%, and desulfurization degree can reach 95%.

2, utilize the heat of the high-temperature flue gas that boiler discharges to add the low-temperature flue gas that thermal purification has been crossed, do not need other Outer thermal source has been saved newly added equipment investment and energy expenditure.

3, flue gas desulphuization rate can be realized two-stage control, if when 60-70% is only required in desulfurization, can not carry out the third level and absorb, and is about to alkalies and releases from alkaline liquid pool (6), allows flue gas directly enter demister (7).If require desulfurization, then to carry out the third level and absorb greater than 70% o'clock.

Claims

1, a kind of desulfurating dust removing device for flue gas, it includes scrubbing tower, it is characterized in that, and there is Venturi tube at the center in this tower, and there is baffle means this pipe lower end, and (operating) water nozzle is equipped with, filter, alkaline liquid pool, demister and flue gas heating chamber in middle part and top in the tower body.

According to the described device of claim 1, it is characterized in that 2, a Venturi tube (9) is equipped with at the center of shell (2), a (operating) water nozzle is housed, a baffle means (1) is housed in the outlet lower end of Venturi tube (9) in the trunnion upper end of Venturi tube (9); In the middle and lower part of shell (2) filter (3) is housed, a ring-like pipe (17) is housed, 8～10 (operating) water nozzles are housed on this pipe on this filter top; In shell (2) middle and upper part one annular alkali lye pond (6) is housed, smoke outlet tube (12) is introduced in the alkali lye in this pond; A demister (7) is housed on smoke outlet tube.

According to claim 1 or 2 described devices, it is characterized in that 3, between shell (2) top cover and demister (7) a flue gas heating chamber (8) is housed, this heating chamber is communicated with the upper end of Venturi tube (9).

According to claim 1 or 2 or 3 described devices, it is characterized in that 4, install to erectting, shell (2) can be cylindrical shape, also the side's of can be bodily form.