CN202725022U - Flue gas desulfurization returning device of circulating fluidized bed - Google Patents
Flue gas desulfurization returning device of circulating fluidized bed Download PDFInfo
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- CN202725022U CN202725022U CN 201220385289 CN201220385289U CN202725022U CN 202725022 U CN202725022 U CN 202725022U CN 201220385289 CN201220385289 CN 201220385289 CN 201220385289 U CN201220385289 U CN 201220385289U CN 202725022 U CN202725022 U CN 202725022U
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- ash
- desulfurization
- dust collector
- returning device
- flue gas
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Abstract
The utility model belongs to the technical field of flue gas dry desulfurization, and relates to a returning device, in particular to a flue gas desulfurization returning device of a circulating fluidized bed, and the flue gas desulfurization returning device comprises a desulfurization tower, a dust collector ash bucket and an intermediate ash cabin; an ash discharging port of the dust collector ash bucket is connected with the intermediate ash cabin through a primary helical conveyor, desulfurization ash is horizontally conveyed to the intermediate ash cabin, the intermediate ash cabin is connected with the desulfurization tower through a secondary helical conveyor, a great amount of desulfurization ash in the intermediate ash cabin is conveyed into the desulfurization tower to be reacted, and in such mode, the desulfurization ash is recycled for multiple times; and the ash discharging port of the dust collector ash bucket is connected with the primary helical conveyor through a buffering elbow. The ash discharging port of the dust collector ash bucket is ingeniously connected with the primary helical conveyor through the buffering elbow, threads can be prevented from being failed because of accidental discharging of ash through a simple structure, and nonuniformity phenomenon of the reaction in the boiler, an air draught fan and the desulfurization tower caused by nonuniformity of the ash discharging of the dust collector can be avoided.
Description
Technical field
The utility model belongs to the Dry Technologies of Flue Gas Desulphurizaion field, relates to a kind of material-returning device, specifically a kind of circulating fluid bed flue-gas desulfurizing material-returning device.
Background technology
The 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, affect the healthy of people.For 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 (flue gas desulfurization) after desulfurization and the burning in desulfurization before the burning, the burning, wherein desulfurization is considered to control SO after the smoke combustion
2Pollute the most effective approach.With regard to flue gas desulfurization technique, the flue gas desulfurization technique of be applied at present broad development and application mainly contains 4 kinds: humidification water activation method (LIFAC) and recirculating fluidized bed flue gas purifying technique (CFB-FGD) behind Wet Limestone/gypsum absorption process (Wet-FGD), dry spraying dry decontamination technique (SDA), the in-furnace calcium spraying.
The recirculating fluidized bed flue gas purifying technique is to 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, the 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 by excessive Ca (OH)
2Powder is repeatedly circulation in desulfurizing tower, is under 1.3～1.6 conditions at suitable Ca/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 agent is shorter at the desulfurization dwell time in the tower, most of new desulfurizing agent that adds enters rear deduster with flue gas from the outlet of desulfurization top of tower, in the Desulphurization that deduster is collected, contain a large amount of not desulfurizing agents of reflection, need to Desulphurization be back to desulfurizing tower by a cover material-returning device and re-use, thereby realize under lower calcium sulfur ratio, realizing higher desulfuration efficiency.More general material-returning device is to utilize air flume to combine with air-lock device at present.Such material-returning device need configure that blower fan and heater are auxiliary blows to air flume, and needs the configuration ash exhauster under each ash bucket, and such as the storehouse pump etc., this material-returning device motor is more, and power consumption is large, needs supporting special air-lock device, such as star-like ash ejector etc.
The application number that the applicant proposes is 200920233508.0 utility model patent, a kind of circulating fluid bed flue-gas desulfurizing material-returning device is disclosed, but when this device is in use faced various operating mode, spiral is sometimes because suddenly descending ash to break down, grey inequality causes boiler under the deduster thereby make, and air-introduced machine and desulfurizing tower react unequal phenomenon.
The utility model content
Technical problem to be solved in the utility model is, overcome the shortcoming of prior art, a kind of circulating fluid bed flue-gas desulfurizing material-returning device is provided, can prevents spiral because suddenly descending ash to break down, avoid under the deduster grey inequality to cause boiler, air-introduced machine and sulphur tower reaction uneven phenomenon.
The technical scheme that the utility model solves above technical problem is:
The circulating fluid bed flue-gas desulfurizing material-returning device comprises desulfurizing tower, dust collector ash hopper and middle ash silo; The dust collector ash hopper dust inlet connects described middle ash silo by the one-level conveying worm, with the Desulphurization horizontal feed to middle ash silo, middle ash silo connects described desulfurizing tower by the deuterostrophies conveyer, most of Desulphurization in the middle ash silo is delivered to again reaction in the desulfurizing tower, and so Desulphurization is through recycled for multiple times; The dust collector ash hopper dust inlet connects the one-level conveying worm by buffer bent.
The utility model connects institute's one-level conveying worm at the dust collector ash hopper dust inlet by buffer bent cleverly, and simple structure prevents spiral because of suddenly descending ash to break down, and avoids that grey inequality causes that boiler, air-introduced machine and sulphur tower react uneven phenomenon under the deduster.Traditional method, ash are to rely on gravity directly to drop down onto the one-level conveying worm, and vertical pipe can not dust stratification, and when boiler or air-introduced machine parameter fluctuation, the grey quantity that falls fluctuates thereupon; After adopting elbow, the elbow second half section is because horizontal dust stratification section plays cushioning effect, the ash fluctuation that falls that stops or reduce to cause because of boiler or air-introduced machine parameter fluctuation.
The technical solution of the utility model the applicant's further research improved making whether further on the basis of original technology, applicant's ash evenly time the under whether research can further improve, there is improved space the junction of finding dust collector ash hopper dust inlet and one-level conveying worm, and then carried out Multitest, finally found a not only simple but also practical technical scheme, to be the dust collector ash hopper dust inlet connect the one-level conveying worm by buffer bent can reach and prevent spiral because suddenly descending ash to break down, and the uniform purpose of ash under the deduster; No matter be the angle from the discovery technique problem, or technical scheme itself, creative work all paid.
The technical scheme that the utility model further limits is:
Aforesaid circulating fluid bed flue-gas desulfurizing material-returning device, the bent angle of buffer bent is for being the acute angle less than 45 ° of degree.It is stronger that such angle arranges cushioning effect, the ash fluctuation that falls that stops or reduce to cause because of boiler or air-introduced machine parameter fluctuation.
Embedded deuterostrophies conveyer in the aforesaid circulating fluid bed flue-gas desulfurizing material-returning device, middle ash silo.
The beneficial effects of the utility model are: but the ⑴ Desulphurization can suitably reduce the requirement to the difference in height of rear dust collector ash hopper and desulfurizing tower returning charge mouth by the conveying worm horizontal feed; ⑵ need not air-lock device, can reach lock gas purpose by middle ash silo; ⑶ package unit only has two motors, and more traditional material-returning device saves at least three motors, thereby reaches the purpose of power and energy saving; ⑷ discharge under the ash silo in the middle of desulfurization ash concentrates on, save at least one cover ash conveying device, reduced the number of devices of desulphurization system, reduce investment, be convenient to maintenance and maintenance; ⑸ meet one-level conveying worm place at the ash bucket dust inlet buffer bent be set for adapting to various operating modes, prevent spiral because suddenly descending ash to break down, and grey inequality causes boiler under the deduster, and air-introduced machine, desulfurizing tower react unequal phenomenon; ⑹ because shorten space length, and the space characteristics of compact layout more adapts to a lot of transformation projects.
Description of drawings
Fig. 1 is connection diagram of the present utility model.
Fig. 2 is the connection diagram of the utility model dust collector ash hopper and one-level conveying worm.
The specific embodiment
Embodiment 1
The present embodiment provides a kind of circulating fluid bed flue-gas desulfurizing material-returning device, connect as shown in Figure 1, comprise desulfurizing tower 1, dust collector ash hopper 2 and middle ash silo 3, ash silo 3 in the middle of the dust inlet 6 of dust collector ash hopper 2 connects by one-level conveying worm 4, middle ash silo 3 embedded deuterostrophies conveyers 5 connect desulfurizing tower 1 by deuterostrophies conveyer 5.Dust collector ash hopper dust inlet 6 connects one-level conveying worm 4 by buffer bent 7, connects as shown in Figure 2, and the bent angle of buffer bent is for being the acute angle less than 45 ° of degree.
Flue gas enters desulfurizing tower 1, carry out desulphurization reaction at the desulfurizing tower 1 interior desulfurizing agent that adds simultaneously, unreacted desulphurizer mixing Desulphurization enters rear deduster together, the Desulphurization that rear deduster is collected is to dust collector ash hopper 2 places, dust collector ash hopper 2 dust inlet places connect one-level conveying worm 4, with the Desulphurization horizontal feed to middle ash silo 3, middle ash silo 3 embedded deuterostrophies conveyers 5, most of Desulphurization in the middle ash silo 3 is delivered to again reaction in the desulfurizing tower 1, so Desulphurization can pass through recycled for multiple times, is issued to purpose than high desulfurization efficiency thereby reach at lower calcium sulfur ratio.Connect institute's one-level conveying worm at the dust collector ash hopper dust inlet by buffer bent, simple structure prevents spiral because of suddenly descending ash to break down, and avoids that grey inequality causes that boiler, air-introduced machine and sulphur tower react uneven phenomenon under the deduster.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (3)
1. the circulating fluid bed flue-gas desulfurizing material-returning device comprises desulfurizing tower, dust collector ash hopper and middle ash silo; Described dust collector ash hopper dust inlet connects described middle ash silo by the one-level conveying worm, with the Desulphurization horizontal feed to middle ash silo, ash silo connects described desulfurizing tower by the deuterostrophies conveyer in the middle of described, most of Desulphurization in the middle ash silo is delivered to again reaction in the desulfurizing tower, and so Desulphurization is through recycled for multiple times; It is characterized in that: described dust collector ash hopper dust inlet connects described one-level conveying worm by buffer bent.
2. circulating fluid bed flue-gas desulfurizing material-returning device as claimed in claim 1 is characterized in that: the bent angle of described buffer bent is the acute angle less than 45 ° of degree.
3. circulating fluid bed flue-gas desulfurizing material-returning device as claimed in claim 1 or 2 is characterized in that: embedded deuterostrophies conveyer in the ash silo in the middle of described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220385289 CN202725022U (en) | 2012-08-03 | 2012-08-03 | Flue gas desulfurization returning device of circulating fluidized bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220385289 CN202725022U (en) | 2012-08-03 | 2012-08-03 | Flue gas desulfurization returning device of circulating fluidized bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202725022U true CN202725022U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220385289 Expired - Fee Related CN202725022U (en) | 2012-08-03 | 2012-08-03 | Flue gas desulfurization returning device of circulating fluidized bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202725022U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102806007A (en) * | 2012-08-03 | 2012-12-05 | 南京龙玖环境工程有限公司 | Circulating fluidized bed flue gas desulfurizating and returning device |
| CN112221340A (en) * | 2020-10-20 | 2021-01-15 | 威海市正大环保设备股份有限公司 | Integrated method for desulfurizing and dedusting by humidifying circulation semidry method outside tower |
-
2012
- 2012-08-03 CN CN 201220385289 patent/CN202725022U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102806007A (en) * | 2012-08-03 | 2012-12-05 | 南京龙玖环境工程有限公司 | Circulating fluidized bed flue gas desulfurizating and returning device |
| CN112221340A (en) * | 2020-10-20 | 2021-01-15 | 威海市正大环保设备股份有限公司 | Integrated method for desulfurizing and dedusting by humidifying circulation semidry method outside tower |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20150803 |
|
| EXPY | Termination of patent right or utility model |