CN201154292Y - Flue gas wet desulphurization absorption and oxygenize apparatus - Google Patents
Flue gas wet desulphurization absorption and oxygenize apparatus Download PDFInfo
- Publication number
- CN201154292Y CN201154292Y CNU2008200316273U CN200820031627U CN201154292Y CN 201154292 Y CN201154292 Y CN 201154292Y CN U2008200316273 U CNU2008200316273 U CN U2008200316273U CN 200820031627 U CN200820031627 U CN 200820031627U CN 201154292 Y CN201154292 Y CN 201154292Y
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- oxidizing
- tower
- flue gas
- slurries
- absorption tower
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Abstract
The utility model relates to wet desulfurization absorbing and oxidizing device for fume, which is used for the wet desulfurization absorbing and oxidizing process for limestone/gesso fume. The wet desulfurization absorbing and oxidizing device comprises an absorption tower which is provided with a fume outlet and a fume inlet; a demister, a spray pipe with a plurality of nozzles, an oxidizing ejection gun and a blender are arranged in the tower; a circulation pipeline and a circulation pump are arranged between a serous fluid pool at the bottom of the towerand the spray pipe; a serous fluid even-distributing ring is arranged on the inner wall of the absorption tower below the spray pipe, and eyelets are distributed on the ring; the oxidizing ejection gun and the blender are arranged in the same layer correspondingly one by one, and the oxidizing ejection gun is positioned above the corresponding blender. The arrangement of the serous fluid even-distributing ring can realize the circulation of the fume near the inner wall of the absorption tower and can replace the spraying of the nozzles which are not required to tightly abut against the tower wall, thereby preventing the problems that the tower wall is perforated and the serous fluid is leaked. The oxidizing air ejection gun is arranged beside the blender, playing the roles of both blending and evenly distributing and oxidizing the air, thereby improving the contacting time of oxidizing air and calcium sulfite and improving the oxidizing efficiency.
Description
Technical field
The utility model relates to a kind of absorption oxidation device that is used for the limestone/gypsum smoke-gas wet desulfurization.
Background technology
At present, the technology that domestic flue gas desulphurization adopts mainly contains wet method limestone/gypsum flue gas desulfurization technique, CFB sulfur removal technology, LIFAC sulfur removal technology and seawater desulfurizing process or the like, and wherein the wet method limestone/gypsum flue gas desulfurization technique accounts for about 90%.The main process of limestone/gypsum flue gas desulfurization technique is: the smoke absorption tower inlet of power plant boiler unit afterbody feeds, multilayer nozzle in the absorption tower is uniformly distributed in absorbent slurry in the absorption tower that is filled with flue gas with vaporific, and sulfur in smoke is absorbed slurries washings and reacts with calcium carbonate in the slurries; Absorbed SO
2Slurries drop at the bottom of the tower, the air oxygen that calcium sulfite is wherein blasted changes into and enters the plasma discharge system after calcium sulfate (being gypsum) sub-fraction gypsum slurries goes out tower, most of slurries mix with the fresh absorbent slurries of adding, squeeze into atomizer by circulating pump, and circulation is spraying again.Top on the absorption tower is provided with demister, and to remove the fine drop that flue gas after desulfurization is taken out of, clean flue gas enters atmosphere from the absorption tower outlet.
At present, the subject matter of traditional absorption tower existence has:
1, in order to reduce the spray clear area that flue gas forms near the tower wall as far as possible, the layout of nozzle will extend near the tower wall as far as possible, because nozzle easily causes damage to the tower wall near the inwall of tower, easily cause the absorption tower wall to pierce through spillage, had a strong impact on the long-time running of device;
2, absorb in the Tata prime cement liquid pool agitator and oxidation spray gun each other independently branch be arranged, promptly lower floor establishes agitator, the oxidation air spray gun is established in the upper strata oxidation.Because spray gun is away from agitator, the slurries oxidation is insufficient, and calcium sulfite can not transfer stable calcium sulfate well to, and the crystallization that has influenced gypsum forms.The desulfurated plaster constituent analysis shows that calcium sulfite content is very high, and calcium sulphate content is lower.
Summary of the invention
The purpose of this utility model provides a kind of improved flue gas wet flue gas wet desulfurization absorption oxidation device, can overcome the tower wall and pierce through spillage, and make the abundant oxidation of calcium sulfite in the slurries pond, absorption tower.
This flue gas wet desulfurization absorption oxidation device comprises the absorption tower, be provided with demister in the tower, contain shower, oxidation spray gun, the agitator of a plurality of nozzles, the portion of tower prime cement liquid pool and shower is provided with circulation line and circulating pump, the uniform ring of slurries is housed on the absorption tower inwall below the shower, is distributed with aperture on the ring; The agitator layering is provided with, and every layer is provided with 3 agitators at least, and the oxidation spray gun is arranged on by each agitator correspondingly, for example the oxidation spray gun can be located at the top of corresponding agitator.
Said agitator is one deck setting, and one deck is provided with four agitators.
Totally three layers of said showers are equipped with the uniform ring of slurries respectively on the absorption tower inwall below every layer of shower.
In this device, slurries are sprayed by nozzle atomization, most of liquid contacts with from bottom to top flue gas adverse current and removes sulfur dioxide, the slurries at fraction edge spray on the uniform ring of slurries, directly flow down from aperture, contact with the rising flue gas adverse current in the tower inner peripheral area, remove sulfur in smoke.
Every agitator side in the slurries pond, bottom, absorption tower is provided with corresponding oxidation spray gun, like this, agitator not only plays stirring action but also play even dispersion air, prevent that slurries from precipitating on the one hand in the absorption tower, oxidation air is evenly distributed in the absorption tower, guarantee after the desulfurization calcium sulfite can with the abundant catalytic oxidation of air, reaction forms stable calcium sulfate.
Therefore, the uniform ring of slurries can solve near the flue gas desulfurization the inwall of absorption tower effectively, thereby device can will keep safe distance between nozzle and the absorption Tata wall when design nozzle layout, and promptly nozzle needn't be near the tower wall.Therefore, being arranged under the prerequisite that does not influence sprinkle density of the uniform ring of slurries both guaranteed desulfuration efficiency, solved absorption Tata wall again and pierced through the spillage problem; Simultaneously, the size of aperture and position are calculated definite according to the pressure and the slurry flow situation of the uniform ring of slurries present position on the uniform ring of slurries, neither reduce the flow area of flue gas, strengthened the gas-liquid contact again, help improving desulfuration efficiency, and then under the situation that guarantees desulfuration efficiency, can suitably reduce liquid-gas ratio, and distribute circulating pump and circulation pipe rationally, reduce engineering investment cost.
In addition, agitator in this device adopts one deck to arrange (300MW and following generator set desulfurization engineering), every other oxidation air spray gun of laying of agitator, agitator not only plays stirring action but also play the effect of even distribution oxidation air, under the prerequisite that does not influence slurries pond mixing effect, has strengthened the distributed points of oxidation air, improved the uniformity that oxidation air distributes, thereby improve the time of contact of oxidation air and calcium sulfite, improved oxidation efficiency, the conversion ratio of calcium sulfite is improved.
Description of drawings
Fig. 1 is the structural representation of the utility model wet desulfurization absorption oxidation device.
Fig. 2 is the structure chart of the uniform ring of slurries.
Fig. 3 is the B portion amplification assumption diagram of Fig. 2.
Fig. 4 is the A portion amplification assumption diagram of Fig. 1.
Fig. 5 represents the schematic diagram of four agitators same layout layer in tower.
Wherein, 1 is the absorption tower, and 1-1 is a tower prime cement liquid pool, 1-2 is a smoke inlet, and 1-3 is an exhanst gas outlet, and 2 is demister, 3 is shower, and 4 is nozzle, and 5 are the oxidation spray gun, 6 is agitator, and 7 is that circulation line 8 is the slurries inlet screen, and 9 is the pump inlet expansion joint, 10 is circulating pump, 11 circulating-pump outlet expansion joints, 12 is the uniform rings of slurries, 12-1 is the aperture on the uniform ring of slurries.
The specific embodiment
Shown in Fig. 1,2,3,4, the top on the absorption tower 1 of the utility model desulfurization absorption oxidation device is provided with demister 2, shower 3, is provided with nozzle 4, oxidation spray gun 5, agitator 6 in the 1-1 of slurries pond, bottom; Link to each other with circulation pipe 7 between bottom slurries pond 1-1 and the three layers of shower 3, the inlet of circulation line 7 is provided with filter screen 8, and circulation line 7 is by import expansion joint 9 and export expansion joint 11 access circulating pumps 10; On the absorption Tata wall below every layer of spray 3, a uniform ring 12 of slurries is housed respectively; In the tower prime cement liquid pool 1-1, oxidation spray gun 5 is arranged in same one deck with agitator 6, and oxidation spray gun 5 is arranged on agitator 6 tops, and oxidation spray gun 5 is arranged on the top of agitator 6 correspondingly.
In the utility model device, 1 inlet 1-2 enters and rises in tower flue gas from the absorption tower; The absorbent lime stone slurry is from nozzle 4 atomizing ejections, most of slurries contact with the flue gas adverse current of rising, lime stone slurry absorbs sulfur in smoke and generates calcium sulfite, the slurries at fraction edge spray on the uniform ring 12 of slurries, directly flow down from aperture 12-1, contact the same sulfur dioxide that absorbs wherein with the rising flue gas adverse current of tower inner peripheral area.The calcium sulfite slurries that generate drop to tower prime cement liquid pool 1-1, are oxidized to calcium sulfate at the constantly following pressure-air that sprays into spray gun 5 of agitator 6, i.e. gypsum.The purification flue gas that has removed sulfur dioxide enters atmosphere by absorption tower outlet 1-3 after demister 2 is removed droplet.
Claims (2)
1, flue gas wet desulfurization absorption oxidation device, comprise the absorption tower, be provided with the flue gas entry and exit, be provided with demister in the tower, shower, oxidation spray gun, the agitator of a plurality of nozzles are housed, the portion of tower prime cement liquid pool and shower is provided with circulation line and circulating pump, it is characterized in that on the absorption tower inwall of shower below the uniform ring of slurries being housed, be distributed with aperture on the ring; Oxidation spray gun and agitator are arranged on same one deck correspondingly, and the oxidation spray gun is positioned at corresponding agitator top.
2, flue gas wet desulfurization absorption oxidation device according to claim 1 is characterized in that totally three layers of said showers, and the uniform ring of slurries is housed respectively on the absorption tower inwall below every layer of shower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200316273U CN201154292Y (en) | 2008-02-01 | 2008-02-01 | Flue gas wet desulphurization absorption and oxygenize apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200316273U CN201154292Y (en) | 2008-02-01 | 2008-02-01 | Flue gas wet desulphurization absorption and oxygenize apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201154292Y true CN201154292Y (en) | 2008-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200316273U Expired - Lifetime CN201154292Y (en) | 2008-02-01 | 2008-02-01 | Flue gas wet desulphurization absorption and oxygenize apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201154292Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115400564A (en) * | 2022-08-16 | 2022-11-29 | 国家电投集团远达环保装备制造有限公司 | Boiler flue gas desulfurization system |
-
2008
- 2008-02-01 CN CNU2008200316273U patent/CN201154292Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115400564A (en) * | 2022-08-16 | 2022-11-29 | 国家电投集团远达环保装备制造有限公司 | Boiler flue gas desulfurization system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081126 |