CN102423625A - Circulating fluidized bed flue gas desulfurization tower - Google Patents
Circulating fluidized bed flue gas desulfurization tower Download PDFInfo
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- CN102423625A CN102423625A CN201110386123XA CN201110386123A CN102423625A CN 102423625 A CN102423625 A CN 102423625A CN 201110386123X A CN201110386123X A CN 201110386123XA CN 201110386123 A CN201110386123 A CN 201110386123A CN 102423625 A CN102423625 A CN 102423625A
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- tower
- flue gas
- desulfurization
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Abstract
The invention discloses a circulating fluidized bed flue gas desulfurization tower. The tower comprises a tower body, wherein a desulfurization slag discharge port, an ash poking port and a flue gas inlet are formed on the lower part of the tower body; a return ash inlet, a desulfurizing agent inlet and a nozzle interface are formed on the middle part of the tower body; a flue gas outlet is formed at the upper end of the tower body; and a desulfurization tower outlet necking section is arranged between the desulfurization slag discharge port and the flue gas inlet. The tower is characterized in that: 4 to 20 discrete air distribution devices are uniformly arranged on the internal oblique surface of the necking section; and each air distribution device is provided with an obliquely upward air outlet. The air distribution devices are arranged on the necking section, so that fly ash falling in the tower is blown and remixed with flue gas; and the air distribution devices can blow the fly ash and can improve smooth distribution in the tower through the action of air flow to improve desulfurization efficiency.
Description
Technical field
The invention belongs to technical field of chemical, specifically is a kind of desulfurizing tower that flue gas is handled that is used for.
Background technology
Pernicious gases such as the sulfur dioxide in flue gas that produces when fire coal, fuel oil, combustion gas, nitrogen oxide enter atmosphere, cause acid rain, destroy ecological environment, influence the healthy of people.To the more strict control control criterion of the relevant environmental regulation of China to the permission concentration of emission proposition of sulfur dioxide in flue gas, nitrogen oxide, various flue gas desulfurization technique method and apparatus arise at the historic moment.
Coal-burning sulfur dioxide control method can be divided three classes: desulfurization and burning back desulfurization (flue gas desulfurization) in desulfurization before the burning, the burning, wherein flue gas desulfurization is considered to control SO
2Pollute valid approach.With regard to flue gas desulfurization technique, the present flue gas desulfurization technique of being used widely and having developed mainly contains 4 kinds:
Wet type limestone/gypsum absorption process (Wet-FGD);
Dry spraying dry decontamination technology (SDA);
Humidification water activation method (LIFAC) behind the in-furnace calcium spraying;
Recirculating fluidized bed flue gas purifying technique (CFB-FGD);
The recirculating fluidized bed flue gas purifying technique is to be the basis with the recirculating fluidized bed principle, through the repeatedly recirculation of absorbent, the time of contact of extension of absorbent and flue gas, has improved the utilization rate of absorbent greatly.The recirculating fluidized bed flue gas purifying technique will add the Ca (OH) of desulfurizing tower
2SO in powder and the flue gas
2And other compositions such as SO in the flue gas
3, sour gas such as HCl, HF fully contact mixing, the atomized water that the desulfurizing tower porch sprays into reduces flue-gas temperature on the one hand, guarantees optimum reaction condition, on the other hand at Ca (OH)
2The surface of particle forms liquid phase.Ca (OH) in the desulfurizing tower
2Powder, flue gas and the moisture that sprays into fully mix under suspended state, and through excessive Ca (OH)
2Powder is repeatedly circulation in desulfurizing tower, is under 1.3 ~ 1.6 conditions at appropriate C a/S ratio, makes SO in the flue gas
2, SO
3Absorbed more fully Deng the sour gas physical efficiency, realized the efficient utilization of high-efficiency desulfurization and desulfurizing agent.
Desulfurizing tower directly influences the desulfuration efficiency of a whole set of desulphurization system as the critical component of recirculating fluidized bed flue gas purifying technique.In order to guarantee the abundant fluidisation and the suspension of desulfurizing agent and flying dust in the desulfurizing tower; Generally one or several ash discharging hole is set in the desulfurizing tower bottom; To discharge the bigger lime-ash of particle; Thereby form flow field preferably, be beneficial to the desulfurizing tower flow field and be evenly distributed, thereby desulfurizing agent and fly ash granule can fully mix in desulfurizing tower with flue gas.Practice result shows that the bottom of desulfurizing tower is provided with push-pull valve, and regularly carries out scarfing cinder at the bottom of the tower, help reducing drag losses, and desulfurized effect makes moderate progress.The defective that existing this desulfurizing tower bottom adds the design existence of push-pull valve has: the boiler oxygen content increases; Defectives such as flowing field stability difference and flow process distribution are asymmetric.
Summary of the invention
Technical problem to be solved by this invention is the deficiency to above-mentioned prior art, and provide a kind of flow field in tower of stably desulphurizing better, further reduce flue gas flow through in the desulfurizing tower drag losses and improve the desulfurizing tower load adaptability can circulating fluid bed flue gas desulfurization tower.
For solving the problems of the technologies described above; The technical scheme that the present invention adopts is: a kind of circulating fluid bed flue gas desulfurization tower, comprise tower body, and be provided with desulfurization slag outlet, ash poking mouth and gas approach in the bottom of tower body; Be provided with returning charge ash inlet at the middle part of tower body; Desulfurizing agent inlet and nozzle interface are provided with exhanst gas outlet in the upper end of tower body, are desulfurizing tower outlet reducing section between described desulfurization slag outlet and the gas approach; It is characterized in that: on the inner chamfer of this reducing section, be provided with 4～20 discrete air-distribution devices uniformly, said air-distribution device has the air outlet that wind direction is tilted to.
Described air-distribution device comprises cloth wind chamber and perforated distributor, on cloth wind chamber, is connected with airduct, and described air outlet is arranged on the perforated distributor.
Described air-distribution device also comprises canvas layer, and canvas layer is arranged on the perforated distributor inboard.
The present invention is provided with air-distribution device in the reducing section, thereby the flying dust that falls in the tower is blown afloat and mixes once more with flue gas, and air-distribution device not only can blow afloat flying dust; Can also be through smooth distribution the in the improved effect tower of air-flow; Improve desulfuration efficiency, compared with prior art, have following advantage:
(1) adapts to desulfurizing agent than other and change the treating method that causes that the desulphurization system resistance increases, more low power consuming is arranged;
(2) improve smooth distribution the in the desulfurizing tower, imitate desulfurization thereby improve;
(3) increase the load variations scope that desulfurizing tower causes adapting to different desulfurizing agents, improve adaptability boiler.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is the structural representation of desulfurizing tower reducing section of the present invention.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is an air-distribution device structural representation of the present invention.
Wherein: 1, tower body, 2, the desulfurization slag outlet, 3, the ash poking mouth, 4, gas approach, 5, the desulfurizing agent inlet; 6, returning charge ash inlet, 7, manhole, 8, nozzle interface, 9, exhanst gas outlet, 10, air-distribution device; 11, cloth wind chamber, 12, airduct, 13, air distribution plate, 14; Canvas layer, 15, band steel, 16, bolt, 17, angle steel, 18, Ta Bi.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is elaborated, as shown in Figure 1, shown in Figure 2; A kind of circulating fluid bed flue gas desulfurization tower of the present invention comprises the tower body 1 that is made up of smoke-box, spurt chamber and desulfurization chamber, is provided with desulfurization slag outlet 2, ash poking mouth 3 and gas approach 4 in the bottom of tower body 1; Be provided with returning charge ash inlet 6 at the middle part of tower body 1, desulfurizing agent inlet 5 and nozzle interface 8 are provided with exhanst gas outlet 9 in the upper end of tower body 1; Be desulfurizing tower outlet reducing section between desulfurization slag outlet 2 and the gas approach 4, the reducing section is square shape circularly all day long, on the inner circular awl inclined-plane of reducing section, is provided with air-distribution device 10 uniformly; The quantity of air-distribution device 10 is 4～20, and air-distribution device 10 has the air outlet that wind direction is tilted to, and air-distribution device comprises cloth wind chamber 11, canvas layer 14 and perforated distributor 13; On cloth wind chamber 11, be connected with airduct 12; Canvas layer 14 is arranged on perforated distributor 13 inboards, and air outlet is arranged on the perforated distributor 13, and the cloth bag material of the common sack cleaner of canvas layer 14 usefulness gets final product; Canvas layer 14 adopts band steel 15 and bolt 16 to be fixed together with air distribution plate 13; Be fixed on the tower wall 18 through angle steel 17 at last, between angle steel 17, tower wall 18 and canvas layer, form cloth wind chamber 11, see Fig. 5.In the present embodiment, the number of air-distribution device 10 is 8, wherein 4 little, 4 are big, referring to Fig. 3 and Fig. 4.
Claims (3)
1. circulating fluid bed flue gas desulfurization tower; Comprise tower body; Be provided with desulfurization slag outlet, ash poking mouth and gas approach in the bottom of tower body, be provided with returning charge ash inlet at the middle part of tower body, desulfurizing agent inlet and nozzle interface; Upper end at tower body is provided with exhanst gas outlet; Be desulfurizing tower outlet reducing section between described desulfurization slag outlet and the gas approach, it is characterized in that: on the inner chamfer of this reducing section, be provided with 4～20 discrete air-distribution devices uniformly, said air-distribution device has the air outlet that wind direction is tilted to.
2. circulating fluid bed flue gas desulfurization tower according to claim 1 is characterized in that: described air-distribution device comprises cloth wind chamber and cloth wind porous plate, on cloth wind chamber, is connected with airduct, and described air outlet is arranged on the porous plate.
3. circulating fluid bed flue gas desulfurization tower according to claim 1 and 2 is characterized in that: described air-distribution device also comprises canvas layer, and this canvas layer is arranged on the perforated distributor inboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110386123XA CN102423625A (en) | 2011-11-29 | 2011-11-29 | Circulating fluidized bed flue gas desulfurization tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110386123XA CN102423625A (en) | 2011-11-29 | 2011-11-29 | Circulating fluidized bed flue gas desulfurization tower |
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| Publication Number | Publication Date |
|---|---|
| CN102423625A true CN102423625A (en) | 2012-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110386123XA Pending CN102423625A (en) | 2011-11-29 | 2011-11-29 | Circulating fluidized bed flue gas desulfurization tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107596883A (en) * | 2017-09-22 | 2018-01-19 | 华电电力科学研究院 | A kind of desulfurization wastewater Zero discharging system and its method of work |
Citations (7)
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|---|---|---|---|---|
| CN2568664Y (en) * | 2002-09-17 | 2003-08-27 | 东南大学 | Orienting jetting fluidized bed gasification furnace |
| CN1513584A (en) * | 2003-08-19 | 2004-07-21 | 武汉凯迪电力股份有限公司 | Vertical eddy flow type circulating fluidization dry process stack gas desulfur method |
| CN201000059Y (en) * | 2006-12-22 | 2008-01-02 | 毕研冲 | Anti-wear circulating fluid bed boiler |
| CN101385941A (en) * | 2007-09-14 | 2009-03-18 | 烟台众力电力节能有限公司 | Efficient circulating fluid bed flue-gas desulfurizing device |
| CN101571288A (en) * | 2009-06-19 | 2009-11-04 | 北京乡电电力有限公司 | Swirl air-distribution device of biomass fluidized bed |
| CN201340203Y (en) * | 2008-12-19 | 2009-11-04 | 宁波金远东工业科技有限公司 | Fluidized cooling device for urea prilling tower |
| CN202410513U (en) * | 2011-11-29 | 2012-09-05 | 南京龙玖环境工程有限公司 | Flue gas desulfurization tower for circulating fluidized bed |
-
2011
- 2011-11-29 CN CN201110386123XA patent/CN102423625A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2568664Y (en) * | 2002-09-17 | 2003-08-27 | 东南大学 | Orienting jetting fluidized bed gasification furnace |
| CN1513584A (en) * | 2003-08-19 | 2004-07-21 | 武汉凯迪电力股份有限公司 | Vertical eddy flow type circulating fluidization dry process stack gas desulfur method |
| CN201000059Y (en) * | 2006-12-22 | 2008-01-02 | 毕研冲 | Anti-wear circulating fluid bed boiler |
| CN101385941A (en) * | 2007-09-14 | 2009-03-18 | 烟台众力电力节能有限公司 | Efficient circulating fluid bed flue-gas desulfurizing device |
| CN201340203Y (en) * | 2008-12-19 | 2009-11-04 | 宁波金远东工业科技有限公司 | Fluidized cooling device for urea prilling tower |
| CN101571288A (en) * | 2009-06-19 | 2009-11-04 | 北京乡电电力有限公司 | Swirl air-distribution device of biomass fluidized bed |
| CN202410513U (en) * | 2011-11-29 | 2012-09-05 | 南京龙玖环境工程有限公司 | Flue gas desulfurization tower for circulating fluidized bed |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107596883A (en) * | 2017-09-22 | 2018-01-19 | 华电电力科学研究院 | A kind of desulfurization wastewater Zero discharging system and its method of work |
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Application publication date: 20120425 |