CN101391173A - Combination type flue gas desulfurization sprinkle absorbing tower - Google Patents
Combination type flue gas desulfurization sprinkle absorbing tower Download PDFInfo
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- CN101391173A CN101391173A CNA200710046227XA CN200710046227A CN101391173A CN 101391173 A CN101391173 A CN 101391173A CN A200710046227X A CNA200710046227X A CN A200710046227XA CN 200710046227 A CN200710046227 A CN 200710046227A CN 101391173 A CN101391173 A CN 101391173A
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- absorption tower
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Abstract
The invention discloses a combined spray absorption tower applied to coal-fired flue gas desulfurization. When building a desulphurization unit, in order to fully utilize the original device of a boiler of a power plant, such as a water film dust remover, the desulphurization unit is modified into the spray absorption tower for forming an integrated desulfurization and dedusting device. Therefore, the upper seal head of the original granite water film dust remover is dismantled, and a spray layer section and a demisting section made of glass reinforced plastics are added and connected thereon to form the combined spray absorption tower. A general 13-14m tall water film dust remover can be modified into an 18-20m tall spray absorption tower. When in modification, the endurance to the local wind load of the combined spray absorption tower shall be considered.
Description
Technical field
The flue gas desulfurization spray absorber is that China uses maturation the most, the simplest a kind of absorption tower of structure at present in boiler of power plant flue gas desulfurization, it is applied in the various technologies of wet desulphurization, according to the desulfurization requirement, design the spraying layer of the different numbers of plies, general desulfurization degree can be 80%-95%.
Background technology
China is to be the country of main energy sources with the coal, therefore year discharging SO
2Be about 2,000 ten thousand tons, reduce discharging SO
2Be current urgent task, so will set up various desulfurizers, to medium and small sized unit, wet desulphurization is one of main method.Main technique has in wet desulphurization: (1) lime-gypsum method; (2) soda method; (3) two alkaline process; (4) magnesium oxide method; By FGD (flue gas desulfurization) device that these technologies are set up, spray absorber is a kind of tower of extensive use, and it is by: liquid storage section at the bottom of (1) tower (also not liquid storage); (2) gas approach section; (3) flue gas cooling section; (4) absorber portion; (5) demist section; (6) formation such as exhanst gas outlet section.
Spray absorber, claim hollow-spraying-tower again, flue gas gas speed in tower can be 3-4m/s, the pressure drop of tower is little, is about 350-500pa, because of dead angle area is seldom arranged, cause obstruction so be not easy dirt takes place, be easy to processing, be easy to anticorrosionly, be coated with glass resin flake in available numb stone, fiberglass or the carbon steel and make the absorption tower.
Spray absorber is a mass transfer apparatus, because the nozzle of introducing can make the water or the absorbent atomizing of its spray, so the drop of absorbent is very little, makes mass transfer area very big, and desulfurization degree can reach 90-95%, thereby makes spray column obtain to be extensive use of.
Summary of the invention
Spray absorber is a mass transfer separation equipment, and water dust scrubber is reconstructed into spray absorber, and its method is:
1. determine the tower diameter tower height
1) tower diameter is as the criterion with former water dust scrubber tower diameter;
2) tower height
(1) determines exhaust gas volumn according to flue-gas temperature in the tower;
(2) determine flue gas flow rate in the tower according to exhaust gas volumn and tower diameter;
(3) determine time of contact according to the sulfur removal technology that is adopted;
(4) according to determining the absorber portion height time of contact;
(5) determine tower height;
(6) determine the height of glass steel tower segment.
Example 35t/h coal-burning boiler, exhaust gas volumn are 50000Nm
3/ h, former water film dedusting tower tower diameter Φ 2600mm, tower height 13000mm, gas approach diameter of phi 1400mm, gas approach center line 2700mm at the bottom of tower.
When desulfurizer was set, the sulfur method of selection was two alkaline process, is defined as 3m/s its time of contact, and the exhaust gas volumn in the tower 80 ℃ the time is 67885m
3But/h De Tanei flue gas flow rate thus is 3.55m/s, and can determine the absorber portion height;
H＝3.55×3.5＝12.4m
If the high 2m of demist section, demist section upper end to outlet is 1.6m, so the desulfurizing tower height overall is;
H＝2.7+0.7+12.4+2+1.6＝19.4m
For ease of installing, spraying layer and demist Duan Jun are arranged in the fiberglass, the high 12.8m of pocked stone pagoda section, the about 250mm of fiber crops stone top thickness, so glass steel tower segment height is 6.6m, therefore transform slightly, can make required combination type flue gas desulfurization sprinkle absorbing tower with described installation method.
2. installation method
1) place, pocked stone pagoda top is provided with reinforced concrete circle beam, and smooth, goes up the flange of topped carbon steel system;
The high 400-500mm of collar tie beam, pre-buried steel part in collar tie beam is with fixing steel flanges;
Fiberglass section bottom is provided with flange, seals with acid resistant adhesive mortar between two flanges during installation, connects steel flanges and fiberglass flange then.
2) every 1.0-1.5m place is provided with 3 to 5 on the hoop that band steel makes under collar tie beam, is connected with the steel flange at collar tie beam place with angle steel or channel-section steel, to bear wind load.
3) steelframes such as operating platform, flue support are linked to each other with angle steel or the channel-section steel that wind load is born on the absorption tower, help the stable of absorption tower.
Description of drawings
The schematic diagram of accompanying drawing 1 combined type spray absorber
The specific embodiment
Water dust scrubber is reconstructed the spray absorber method:
1) determines glass steel tower segment height;
Spray absorber is combined by pocked stone pagoda section (B) and glass steel tower segment (A).Spraying layer (7) demist layer (8) and smoke outlet tube (9) are set in the glass steel tower segment, and the fiberglass flange (6) that is connected with numb stone section of setting, glass steel tower segment (A) made thus.Spraying layer to gas approach valve distance is an absorber portion.The flue gas empty tower gas velocity is 3-4m/s, and gas-liquid contact time must be increased fiberglass section height thus at 1.5-4.5 second (different sulfur methods, time of contact is different).
2) remove pocked stone pagoda (B) top cover, reinforced concrete circle beam (2) is set, smooth, topped steel flanges (1);
3) the fiberglass section is connected with numb stone section, coats acid resistant adhesive mortar between the flange or sealing ring (5) is set;
4) the band steel hoop multi-turn (3) of bearing wind load is set, and connects to strengthen the intensity of tower, to bear wind load with angle steel or channel-section steel;
5) spraying layer (7) and demister (8) are installed;
6) connect flue;
7) connect the spray fluid pipeline;
8) check spray absorber, program puts into operation in accordance with regulations then.
Claims (4)
1 the present invention relates to the boiler smoke water dust scrubber that fiber crops are made of stones reconstructs into spray absorber.
2 according to the described absorption tower of claim 1, it is characterized in that for reaching the required gas-liquid contact time of sulfur removal technology 1.5 seconds to 4 seconds, in the tower section of one section glass steel of water dust scrubber top adjunction, in be provided with spraying layer and demister.
3 according to claim 1,2 described absorption tower liquid, former pocked stone pagoda top adds the system high reinforced concrete circle beam of one deck 400-500mm (2), and pre-buried steel part is fixed a circle steel flanges (1), to connect the flange (6) of glass steel tower segment, seal with acid resistant adhesive mortar between two flanges.
4 according to the described absorption tower of claim 1, adopts to add 3 to 5 circle stirrups (3) outside pocked stone pagoda, and is connected to steel flanges (6), so that wind load can be born in the absorption tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710046227XA CN101391173A (en) | 2007-09-21 | 2007-09-21 | Combination type flue gas desulfurization sprinkle absorbing tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710046227XA CN101391173A (en) | 2007-09-21 | 2007-09-21 | Combination type flue gas desulfurization sprinkle absorbing tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101391173A true CN101391173A (en) | 2009-03-25 |
Family
ID=40491807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200710046227XA Pending CN101391173A (en) | 2007-09-21 | 2007-09-21 | Combination type flue gas desulfurization sprinkle absorbing tower |
Country Status (1)
| Country | Link |
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| CN (1) | CN101391173A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102068871A (en) * | 2010-11-23 | 2011-05-25 | 桂林市宏发环保设备工程有限公司 | Granite flue gas desulfurization dust collector with combined Venturi and backwashing water distributor |
| CN102284363A (en) * | 2011-08-02 | 2011-12-21 | 江苏中兴化工设备有限公司 | Glass reinforced plastic washing electric defogger |
| CN102380306A (en) * | 2011-10-18 | 2012-03-21 | 中钢集团天澄环保科技股份有限公司 | Flue gas desulfurization tower adopting sodium-alkaline method |
| CN108554129A (en) * | 2018-03-30 | 2018-09-21 | 昌和化学新材料(江苏）有限公司 | A kind of tail gas washing tower using gas-liquid separation membrane |
-
2007
- 2007-09-21 CN CNA200710046227XA patent/CN101391173A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102068871A (en) * | 2010-11-23 | 2011-05-25 | 桂林市宏发环保设备工程有限公司 | Granite flue gas desulfurization dust collector with combined Venturi and backwashing water distributor |
| CN102068871B (en) * | 2010-11-23 | 2013-02-13 | 桂林市宏发环保设备工程有限公司 | Granite flue gas desulfurization dust collector with combined Venturi and backwashing water distributor |
| CN102284363A (en) * | 2011-08-02 | 2011-12-21 | 江苏中兴化工设备有限公司 | Glass reinforced plastic washing electric defogger |
| CN102380306A (en) * | 2011-10-18 | 2012-03-21 | 中钢集团天澄环保科技股份有限公司 | Flue gas desulfurization tower adopting sodium-alkaline method |
| CN108554129A (en) * | 2018-03-30 | 2018-09-21 | 昌和化学新材料(江苏）有限公司 | A kind of tail gas washing tower using gas-liquid separation membrane |
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Open date: 20090325 |