CN101732980A - Diversion device and fume circulating fluidized bed desulfurization system with same - Google Patents
Diversion device and fume circulating fluidized bed desulfurization system with same Download PDFInfo
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- CN101732980A CN101732980A CN201010002585A CN201010002585A CN101732980A CN 101732980 A CN101732980 A CN 101732980A CN 201010002585 A CN201010002585 A CN 201010002585A CN 201010002585 A CN201010002585 A CN 201010002585A CN 101732980 A CN101732980 A CN 101732980A
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Abstract
The invention discloses a diversion device for a fume circulating fluidized bed desulfurization system. The system is provided with a flow return fume pipeline arranged between an outlet flue and an inlet flue; the diversion device is arranged in the inlet flue at the junction part of the diversion device and the flow return fume pipeline and comprises n diversion plates parallel to the inlet flue so as to divide the inlet flue into n+1 parallel fume channels; the n diversion plates are obliquely arrayed from top to bottom in sequence; and inclined angles formed by a connecting line of the outer edges at the upstream sides of the n diversion plates and a symmetrical center line of the inlet flue of the downstream side are acute angles. When the load of equipment for generating fume is lower, the fume circulating fluidized desulfurization system with the diversion device can avoid the problems that the ash falling amount at the tower bottom is excessive and a fluidized bed and further greatly improve the adaptability of the fume circulating fluidized bed desulfurization system. On the basis, the invention also provides a fume circulating fluidized bed desulfurization system with the diversion device.
Description
Technical field
The present invention relates to the flue gas circulating fluidized bed desulfurization technical field, be specifically related to a kind of guiding device and have the fume circulating fluidized bed desulfurization system of this device.
Background technology
The flue gas circulating fluidized bed desulfurization technology is based on the circulating fluid bed reactor principle, by recycled for multiple times to absorbent, and the time of contact of extension of absorbent and smoke reaction, thereby the utilization rate and the desulfuration efficiency of raising absorbent; The mode that it adopts part clean flue gas recirculation can improve operational reliability and desulfurizing tower bed material stable of desulphurization system when underload.Specifically see also Fig. 1, the figure shows the schematic diagram of existing a kind of fume circulating fluidized bed desulfurization system.
In this fume circulating fluidized bed desulfurization system, when the load rate of plant that produces flue gas drops to certain value, the exhaust gas volumn of its output is less, make that the flow through speed of Venturi tube (group) 10 of flue gas is on the low side, cause a part of granular desulfurizing agent to pass through Venturi tube throat downwards and reduce desulfurizing agent concentration in the circulating fluid bed reactor 20, and then reduce sorbent utilization and desulfuration efficiency.So, for strengthening the adaptability of fume circulating fluidized bed desulfurization system to the load rate of plant of generation flue gas, after this system's desulfurization, draw the clean flue gas of getting a part the deduster exhaust pass 30, and make it to be back in the inlet flue duct 40 and mix with raw flue gas, guaranteeing approaching its design load, change influence to sorbent utilization and desulfuration efficiency thereby eliminate the load rate of plant that produces flue gas to greatest extent by total exhaust gas volumn of Venturi tube or venturi nest of tubes.
In addition, the latter end of the flue 50 that backflows of this scheme is by confluxing 60 oblique intersecting of threeway with the abnormal shape of inlet flue duct 40, and backflow and some deflectors 70 are set in the flue gas pipeline section (or the flue latter end that backflows) in the conflux admittance of threeway 60 of abnormal shape, thereby make the flue gas direct of travel that backflows approach raw flue gas at the abnormal shape direct of travel of threeway 60 inlet ends that confluxes, so reduce mixed flue gas abnormal shape conflux threeway top and the bottom, 60 outlet side or about the current difference of portion.And two bending parts at desulfurizing tower inlet elbow 80 are respectively arranged with one group of deflector 90, make the flue gas of Venturi tube (group) outlet side have more even, stable flow field and only low lowest speed.Like this, when the load rate of plant that produces flue gas is reduced in the certain limit, because of the ratio of required backflow exhaust gas volumn and raw flue gas amount less, water conservancy diversion, rectification by two groups of deflectors in above-mentioned deflector, the desulfurizing tower inlet elbow and Venturi tube (group), still can guarantee that the flue gas mean flow rate, lowest speed of Venturi tube (group) outlet side and the uniformity that desulfurizing tower reactor flow field distributes adhere to specification, thereby avoid taking place falling at the bottom of the tower ash amount too much and the fluid bed problem of unstable.
But, continuing to descend if produce the load rate of plant of flue gas, the then required exhaust gas volumn of backflowing is increasing.Particularly, when its rate of load condensate drops to the required exhaust gas volumn of backflowing and roughly equates with the raw flue gas amount, Venturi tube (group) outlet side and the flow distribution evenness in the desulfurizing tower reactor of existing fume circulating fluidized bed desulfurization system are relatively poor, and the flue gas lowest speed in the Venturi tube (group) is low excessively, to cause thus and fall the ash amount at the bottom of the tower too much and the fluid bed problem of unstable, even the bed that collapses occur.
In view of this, demand urgently being optimized design, with the adaptability of further enhancing fume circulating fluidized bed desulfurization system to the load rate of plant of generation flue gas at existing fume circulating fluidized bed desulfurization system.
Summary of the invention
At above-mentioned defective, the technical problem that the present invention solves is, a kind of guiding device that the desulphurization system flow field distributes that is used to improve is provided.On this basis, the present invention also provides a kind of fume circulating fluidized bed desulfurization system with this guiding device.
Guiding device provided by the invention is used for fume circulating fluidized bed desulfurization system, and this system has the flue that backflows that is arranged between exhaust pass and the inlet flue duct; This guiding device is arranged in the inlet flue duct with the described flue intersection of backflowing, and it comprises n deflector that parallels with inlet flue duct, described inlet flue duct is divided into the individual exhaust gases passes that parallels of n+1; A described n deflector is arranged askew successively from top to bottom, and the angle between the symmetrical center line of the line between the upstream side outer rim of a described n deflector and its downstream inlet flue duct is an acute angle.
Preferably, the angle between the symmetrical center line of the line between the upstream side outer rim of a described n deflector and its downstream inlet flue duct is 10 °～80 °.
Preferably, the height of each described exhaust gases passes equates.
Preferably, this guiding device also comprises n+1 dividing plate at least, is separately positioned in the described n+1 exhaust gases passes and perpendicular with described deflector respectively, to separate each described exhaust gases passes.
Fume circulating fluidized bed desulfurization system provided by the invention, this system has the flue that backflows that is arranged between exhaust pass and the inlet flue duct; Be provided with guiding device in the inlet flue duct of the described flue intersection of backflowing; Described guiding device comprises n deflector that parallels with inlet flue duct, described inlet flue duct is divided into n+1 exhaust gases passes that parallels; A described n deflector is arranged askew successively from top to bottom, and the angle between the symmetrical center line of the line between the upstream side outer rim of a described n deflector and its downstream inlet flue duct is an acute angle.
Preferably, the angle between the symmetrical center line of the line between the upstream side outer rim of a described n deflector and its downstream inlet flue duct is 10 °～80 °.
Preferably, the height of each described exhaust gases passes equates.
Preferably, described guiding device also comprises n+1 dividing plate at least, is separately positioned in the described n+1 exhaust gases passes and perpendicular with described deflector respectively, to separate each described exhaust gases passes.
Preferably, a dividing plate is set in each described exhaust gases passes, and is arranged at respectively on the longitudinal centre line of corresponding exhaust gases passes.
Preferably, with the perpendicular perspective plane of described inlet flue duct in, described inlet flue duct equates with the width of the flue that backflows; In each described exhaust gases passes a plurality of dividing plates are set, and respectively along the uniform setting of the width of corresponding exhaust gases passes.
Preferably, the angle between the symmetrical center line of described backflow flue and its upstream side inlet flue duct is 10 °～90 °.
Guiding device provided by the invention is arranged in the inlet flue duct with the described flue intersection of backflowing, with mix well raw flue gas and clean flue gas mixing place top and the bottom and about the flow of flue gas speed of portion; It comprises some deflectors that parallel with inlet flue duct, from inlet flue duct being divided into a plurality of exhaust gases passes that parallel; Simultaneously, some deflectors are arranged askew successively from top to bottom, roughly stepped arrangement, and the angle between the symmetrical center line of the line between the upstream side outer rim of each deflector and its downstream inlet flue duct is an acute angle.
In the course of work, higher and when not needing clean flue gas to backflow, each deflector in this guiding device and dividing plate plate face are all parallel with the flue gas direction when the load rate of plant that produces flue gas, thereby being combed stream, flue gas makes the desulfurizing tower flow field distribute to improve.Lower and need clean flue gas to backflow when the load rate of plant that produces flue gas, when particularly big flow clean flue gas backflows, clean flue gas and raw flue gas with the inlet flue duct of the flue intersection of backflowing in merge into the mixed flue gas of one big flow, the guiding device of flowing through thereafter; Although flue gas mean flow rate and distributing homogeneity thereof in the gas channel entrance section on different elevations have certain difference, but, after the strong current-sharing effect of its four sidewall paneling, the flow distribution evenness of each strand flue gas in the gas channel outlet obtained very big improvement, thereby the flow distribution evenness of the mixed flue gas of this guiding device outflow also obtains very big improvement certainly.After this, after the guide functions of two groups of deflectors of mixed flue gas in desulfurizing tower inlet elbow, enter in the venturi nest of tubes and the Flow Field Distribution in the desulfurizing tower reactor, more even during then than the employing prior art.
Compared with prior art, when the load rate of plant that produces flue gas is low, the fume circulating fluidized bed desulfurization system of using guiding device of the present invention can avoid occurring falling at the bottom of the tower ash amount too much and the fluid bed problem of unstable, and then has improved the adaptability of fume circulating fluidized bed desulfurization system greatly.
Further, under equal load rate of plant, guiding device of the present invention is suitably reducing under the situation of the exhaust gas volumn of backflowing, every indexs such as uniformity that still can guarantee flue gas mean flow rate, lowest speed and the distribution of desulfurizing tower reactor flow field of Venturi tube (group) outlet side all adhere to specification, thereby reduced the resistance of flue system and desulfurizing tower and deduster to a certain extent, make the supporting motor power consumption of air-introduced machine descend, have certain energy-saving effect.
Guiding device provided by the invention can be used for the fume circulating fluidized bed desulfurization system of any kind, is specially adapted in fire coal boiler fume, flue gas of garbage furnace and the sintering flue gas desulfurization system.
Description of drawings
Fig. 1 is the schematic diagram of existing a kind of fume circulating fluidized bed desulfurization system;
Fig. 2 is the schematic diagram of the described fume circulating fluidized bed desulfurization system of first embodiment;
Fig. 3 is the I portion enlarged drawing of Fig. 2;
Fig. 4 is that the A of Fig. 3 is to view;
Fig. 5 shows the width ratio relation of backflow among second embodiment flue and inlet flue duct;
Fig. 6 shows the baffle arrangement mode in each exhaust gases passes among the 3rd embodiment.
Fig. 7 is that the guiding device among first embodiment is 1: 2 o'clock current-sharing design sketch (CFD analog computation result) at the ratio of exhaust gas volumn with the raw flue gas amount that backflow;
Fig. 8 is the current-sharing design sketch (CFD analog computation result) of guiding device when the exhaust gas volumn of backflowing equates with the raw flue gas amount among first embodiment;
Among Fig. 2-8:
The specific embodiment
Based on prior art, core of the present invention provides a kind of guiding device that the desulphurization system flow field distributes that is used to improve.Can improve the flow distribution evenness of mixed flue gas by this guiding device, and then guarantee that every indexs such as uniformity of flue gas mean flow rate, lowest speed and the distribution of desulfurizing tower reactor flow field of Venturi tube (group) outlet side all adhere to specification.
Specify present embodiment below in conjunction with Figure of description.
See also Fig. 2, this figure is the schematic diagram of the described fume circulating fluidized bed desulfurization system of present embodiment.
The inlet flue duct 1 of this system is communicated with desulfurizing tower reactor 3 through the vertical venturi nest of tubes 2 that is provided with, calcium hydroxide storehouse 4 is communicated with inlet flue duct 1, after flue gas and absorbent together enter and fully mix, react in the desulfurizing tower reactor 3, discharge through the outlet of desulfurizing tower reactor 3 and to enter deduster 5; Clean flue gas after dedusting is discharged through exhaust pass 6.Simultaneously, between exhaust pass 6 and inlet flue duct 1, be provided with the flue 7 that backflows, replenish clean flue gas when the load rate of plant of flue gas hangs down so that produce.Need to prove, main function components such as venturi nest of tubes 2, desulfurizing tower reactor 3, calcium hydroxide storehouse 4, deduster 5, exhaust pass 6 and backflow flue 7 and the water injection system that does not indicate with Reference numeral, air-introduced machine and prior art are identical, so this paper repeats no more.Below will describe this programme inventive point place in detail: be arranged at and the inlet flue duct 1 of flue 7 intersections of backflowing in guiding device 8.
Please in the lump referring to Fig. 3 and Fig. 4, wherein, Fig. 3 is the I portion enlarged drawing of Fig. 2, and Fig. 4 is that the A of Fig. 3 is to view.
This guiding device 8 be arranged on and the inlet flue duct 1 of flue 7 intersections of backflowing in, it comprises n deflector 81 that parallels with inlet flue duct 1, fixedlying connected with the both sides inwall of inlet flue duct 1 respectively in the two ends of each deflector 81, is divided into n+1 exhaust gases passes 11 that parallels with the inlet flue duct 1 that will locate; As shown in the figure, only be the deflector 81 (five deflectors 81 form six exhaust gases passes 11) that example illustrates guiding device 8, so that succinct diagrammatic sketch with n=5.In fact, this deflector 81 can be set to a plurality of based on different system requirements, uses needs all in the scope of the application's protection as long as satisfy.Preferably, the structure of each deflector, each dividing plate and measure-alike.Like this, deflector, dividing plate standardization can be helped their production.
Shown in the figure, five deflectors 81 are arranged askew successively from top to bottom, roughly is ladder-like arranged; Particularly, the angle theta between the symmetrical center line of the line between each deflector 81 upstream side outer rim and its downstream inlet flue duct 1 is an acute angle.Preferably, the angle theta between the symmetrical center line of the line between the upstream side outer rim of each deflector 81 and its downstream inlet flue duct is 10 °, 30 °, 50 °, 60 ° or 80 °.
As shown in the figure, the height of each exhaust gases passes 11 equates, is beneficial to highly determine angle theta according to determined each exhaust gases passes 11, guarantees the current-sharing effect of guiding device 8.
In addition, this guiding device 8 also comprises n+1 dividing plate 82 at least, is separately positioned in n+1 the exhaust gases passes 11 and perpendicular with deflector 81 respectively, to separate each exhaust gases passes 11.As shown in Figure 4, correspondingly with exhaust gases passes 11 be provided with six dividing plates 82.So design can further reduce the cross-sectional area of each flue, thereby makes the shallow bid flue gas that flows be subjected to stronger current-sharing effect within it; Obviously, set up dividing plate 82 and can further improve flow through flow distribution evenness behind this guiding device 8 of mixed flue gas.
As shown in Figure 3, the angle β that backflows in the present embodiment between the symmetrical center line of flue 7 and its upstream side inlet flue duct 1 can be 10 °, 50 ° or 90 °; Under the controllable prerequisite of manufacturing cost, be preferably 30 °～60 °, both the direct of travel of the feasible clean flue gas that backflows approached the direct of travel of raw flue gas in intake channel 1, the bottom flue gas flow rate is suitably increased, and then reduce the current difference of mixed flue gas in intersection.As shown in Figure 4, with the perpendicular perspective plane of inlet flue duct 1 in, the width W 1 of inlet flue duct 1 is greater than the width W 2 of the flue 7 that backflows; A dividing plate 82 is set in each exhaust gases passes 11, and be arranged at respectively on the longitudinal centre line of corresponding exhaust gases passes 11, make that the flow area of the left and right sides of the exhaust gases passes 11 on sustained height is identical, behind the guiding device 8 of guaranteeing to flow through about the flowing velocity basically identical of portion.
Certainly, the proportionate relationship between the width W 2 of the width W 1 of inlet flue duct 1 and the flue 7 that backflows is not limited to shown in the figure.It should be explicitly made clear at this point simultaneously, also can be chosen in and reinforcement (figure do not show) is set in the exhaust gases passes 11 substitutes dividing plate that particularly, the two ends of each reinforcement directly are welded on the inwall of exhaust gases passes 11 or inlet flue duct 1 and get final product.
Flue and deflector based on previous embodiment are set up model, and be that the CFD analog computation has been carried out on the basis with even air inlet, clearly show the current-sharing effect in the inlet flue duct of deflector of the present invention downstream, specifically referring to Fig. 7 and Fig. 8, selected section with dividing plate and inlet flue duct side plate between the straight line that all equates of distance on.Wherein, Fig. 7 is that the guiding device among first embodiment is 1: 2 o'clock current-sharing design sketch at the ratio of exhaust gas volumn with the raw flue gas amount that backflow; Fig. 8 is the current-sharing design sketch of guiding device when the exhaust gas volumn of backflowing equates with the raw flue gas amount among first embodiment.
See also Fig. 5, the figure shows inlet flue duct 1 among second kind of embodiment ' width W 1 and the flue 7 that backflows ' width W 2 between proportionate relationship, that is, and inlet flue duct 1 ' width W 1 and the flue 7 that backflows ' width W 2 equate.Other compositions and annexation and aforementioned first embodiment are identical.
After the product testing, testing result shows: a plurality of dividing plates rationally are set in each exhaust gases passes, can obviously improve the current-sharing effect of whole guiding device.
Further, see also Fig. 6, the figure shows the arrangement of dividing plate described in the third embodiment.
The described guiding device 8 of present embodiment " identical with the basic setup of second embodiment, as shown in Figure 6, with inlet flue duct 1 " in the perpendicular perspective plane, the width W 2 of inlet flue duct 1 " inner chamber width W 1 equal the flue 7 that backflows ".As shown in Figure 6, both differences are, each exhaust gases passes 11 of present embodiment " in a plurality of dividing plates 82 are set " is with the uniform setting of width of corresponding deflector 81 " vertical and respectively along corresponding exhaust gases passes 11 ".Equally, dividing plate 82 " quantity can determine based on concrete system requirements.Be understandable that, for making drawing more succinct, each exhaust gases passes 11 shown in Fig. 6 " in only uniform show three dividing plates 82 ".
From the current-sharing effect, present embodiment is better than second embodiment.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1. guiding device is used for fume circulating fluidized bed desulfurization system, and this system has the flue that backflows that is arranged between exhaust pass and the inlet flue duct; It is characterized in that this guiding device is arranged in the inlet flue duct with the described flue intersection of backflowing, it comprises n deflector that parallels with inlet flue duct, described inlet flue duct is divided into the individual exhaust gases passes that parallels of n+1; A described n deflector is arranged askew successively from top to bottom, and the angle between the symmetrical center line of the line between the upstream side outer rim of a described n deflector and its downstream inlet flue duct is an acute angle.
2. guiding device according to claim 1 is characterized in that, the angle between the line between the upstream side outer rim of a described n deflector and the symmetrical center line of its downstream inlet flue duct is 10 °～80 °.
3. guiding device according to claim 1 is characterized in that, the height of each described exhaust gases passes equates.
4. according to each described guiding device in the claim 1 to 3, it is characterized in that, this guiding device also comprises n+1 dividing plate at least, is separately positioned in the described n+1 exhaust gases passes and perpendicular with described deflector respectively, to separate each described exhaust gases passes.
5. fume circulating fluidized bed desulfurization system, this system has the flue that backflows that is arranged between exhaust pass and the inlet flue duct; It is characterized in that, and be provided with guiding device in the inlet flue duct of the described flue intersection of backflowing; Described guiding device comprises n deflector that parallels with inlet flue duct, described inlet flue duct is divided into n+1 exhaust gases passes that parallels; A described n deflector is arranged askew successively from top to bottom, and the angle between the symmetrical center line of the line between the upstream side outer rim of a described n deflector and its downstream inlet flue duct is an acute angle.
6. fume circulating fluidized bed desulfurization system according to claim 5 is characterized in that, the angle between the line between the upstream side outer rim of a described n deflector and the symmetrical center line of its downstream inlet flue duct is 10 °～80 °.
7. fume circulating fluidized bed desulfurization system according to claim 6 is characterized in that, the height of each described exhaust gases passes equates.
8. according to each described fume circulating fluidized bed desulfurization system in the claim 5 to 7, it is characterized in that, described guiding device also comprises n+1 dividing plate at least, is separately positioned in the described n+1 exhaust gases passes and perpendicular with described deflector respectively, to separate each described exhaust gases passes.
9. fume circulating fluidized bed desulfurization system according to claim 8 is characterized in that, a dividing plate is set in each described exhaust gases passes, and is arranged at respectively on the longitudinal centre line of corresponding exhaust gases passes.
10. fume circulating fluidized bed desulfurization system according to claim 8 is characterized in that, with the perpendicular perspective plane of described inlet flue duct in, described inlet flue duct equates with the width of the flue that backflows; In each described exhaust gases passes a plurality of dividing plates are set, and respectively along the uniform setting of the width of corresponding exhaust gases passes.
11. fume circulating fluidized bed desulfurization system according to claim 5 is characterized in that, the angle between the symmetrical center line of described backflow flue and its upstream side inlet flue duct is 10 °～90 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010002585A CN101732980A (en) | 2010-01-19 | 2010-01-19 | Diversion device and fume circulating fluidized bed desulfurization system with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010002585A CN101732980A (en) | 2010-01-19 | 2010-01-19 | Diversion device and fume circulating fluidized bed desulfurization system with same |
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| CN101732980A true CN101732980A (en) | 2010-06-16 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635857A (en) * | 2012-03-27 | 2012-08-15 | 上海诺特飞博燃烧设备有限公司 | Flue gas and air mixing box device with flue gas recycling technology for reducing NOx emission |
| CN105521665A (en) * | 2015-12-25 | 2016-04-27 | 上海士诺科技有限公司 | Deduster wind inlet duct layered diversion apparatus |
| CN108187489A (en) * | 2018-01-23 | 2018-06-22 | 杭州致蓝环保科技有限公司 | A kind of coke oven desulphurization denitration dust removal integrated plant |
| CN110220209A (en) * | 2019-07-01 | 2019-09-10 | 厦门大学 | Cycle flue variable cross section consumption reduction guiding device and flue variable cross-section method |
| CN114737029A (en) * | 2022-04-21 | 2022-07-12 | 苏州热传道集成电路科技有限公司 | Annealing furnace system capable of rapidly heating |
-
2010
- 2010-01-19 CN CN201010002585A patent/CN101732980A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635857A (en) * | 2012-03-27 | 2012-08-15 | 上海诺特飞博燃烧设备有限公司 | Flue gas and air mixing box device with flue gas recycling technology for reducing NOx emission |
| CN102635857B (en) * | 2012-03-27 | 2016-05-18 | 上海诺特飞博燃烧设备有限公司 | Flue gas reutilization technology flue gas and the air blender device of low NOx drainage fall |
| CN105521665A (en) * | 2015-12-25 | 2016-04-27 | 上海士诺科技有限公司 | Deduster wind inlet duct layered diversion apparatus |
| CN108187489A (en) * | 2018-01-23 | 2018-06-22 | 杭州致蓝环保科技有限公司 | A kind of coke oven desulphurization denitration dust removal integrated plant |
| CN110220209A (en) * | 2019-07-01 | 2019-09-10 | 厦门大学 | Cycle flue variable cross section consumption reduction guiding device and flue variable cross-section method |
| CN110220209B (en) * | 2019-07-01 | 2024-05-17 | 厦门大学 | Variable-section consumption-reducing flow guiding device for circulating flue and variable-section method for flue |
| CN114737029A (en) * | 2022-04-21 | 2022-07-12 | 苏州热传道集成电路科技有限公司 | Annealing furnace system capable of rapidly heating |
| CN114737029B (en) * | 2022-04-21 | 2024-05-03 | 苏州热传道集成电路科技有限公司 | Annealing furnace system capable of heating rapidly |
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Application publication date: 20100616 |