CN101584957A - Integrated coupling device for flue gas desulfurization and dedusting - Google Patents
Integrated coupling device for flue gas desulfurization and dedusting Download PDFInfo
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- CN101584957A CN101584957A CNA2009100537400A CN200910053740A CN101584957A CN 101584957 A CN101584957 A CN 101584957A CN A2009100537400 A CNA2009100537400 A CN A2009100537400A CN 200910053740 A CN200910053740 A CN 200910053740A CN 101584957 A CN101584957 A CN 101584957A
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- flue gas
- jet tray
- gas desulfurization
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- dedusting
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Abstract
The invention, which belongs to the field of flue gas desulfurization technique, provides an integrated coupling device for flue gas desulfurization and dedusting, which includes: a tower body, a tangential intake port, a flue gas exit port, a bottom layer rotational flow board, a inward sprinkler plate, a spraying layer, a lower defogging board and a upper defroster, wherein a central overflow tube is located in the center of the inward sprinkler plate, several injection blades are fixed and equipped on the outer edge of the central overflow tube angularly from layer to layer in a regular polygon mode, and the support plate tendon is connected with double ends of every piece of injection blade in a fixed connection. The invention uses the inward sprinkler plate in an unique design, and couples the spraying method and the rotational flow method in an organic combination, the inward sprinkler plate has multiple efficacies of desulphurization, dedusting, air flow distribution improvement as well as doctor solution influx, thereby the device provided by the invention has high-efficient desulphurization and dedusting functions, moreover reduces the liquid-gas ratio and airflow resistance obviously.
Description
Technical field
What the present invention relates to is a kind of device of boiler flue gas desulfurization technical field, specifically is a kind of integrated coupling device for flue gas desulfurization and dedusting.
Background technology
China is the country of the maximum of coal consumption amount in the world, and because of the total sulfur dioxide that fire coal discharged occupies the first in the world, the soot emissions total amount of China also is in prostatitis, the world simultaneously.Therefore, the Chinese government just progressively carries out strict coal-fired flue-gas discharge standard, carries out the flue gas desulfurization and the dust removal process of station boiler, Industrial Boiler and kiln.
Fume desulphurization method is varied, and the wet desulphurization device of extensive use at present has bottom rotating stream tray scrubber, spray column, bubble tower, Venturi absorber etc.; Spray column is adopted in the large electric power plant desulfurization mostly, because of its gas circuit resistance minimum, can adapt to different boiler loads, but needs to adopt higher liquid-gas ratio, and dust removing effects is undesirable.The advantage of bottom rotating stream tray scrubber is to have the high-effective dust-removing effect, and can realize high efficiency under low liquid-gas ratio; But when boiler load was low, veneer efficient was lower, desulfuration efficiency is not high enough.Spray washing and cyclone technique are combined the advantage that then helps bringing into play the two.
Find by prior art documents: Zhang Guangxin " design of 75t/h boiler flue gas desulfurization device and application " (metallurgical power, 2003,3:637-639) water dust scrubber has been carried out transforming (Zhang Guangxin, design of 75t/h boiler flue gas desulfurization device and application. metallurgical power, 2003,3:637-639), spray section and bottom eddy flow plate are placed respectively in two towers, make flue gas elder generation after spray column gas-liquid following current contact, introduce the bottom rotating stream tray scrubber again and carry out the gas-liquid counter current contact.But this method only is that its flow process is longer with the two simple combination, needs multistage feed flow, and utilization rate of circulation fluid is low.
Number of patent application: 200810120375, publication number CN101342455A, put down in writing a kind of " rotational flow and spray combined desulfurizing device ", this device will spray and bottom eddy flow plate divides two sections and carries out in same tower---and upper strata spray, lower floor's eddy flow, two sections feed liquor is by two groups of separate pumps supplies.This desulfurizer is compact, and when guaranteeing desulfuration efficiency, gas-flow resistance can obviously reduce.But, make this part liquid can't continue again to utilize, thereby cause utilization rate of circulation fluid also relatively low because the doctor solution that sprays flows to the overflow launder of bottom eddy flow plate mostly along the tower wall before arriving lower floor's bottom eddy flow plate.Simultaneously, eddy flow and on the Flow Field Distribution inequality of air-flow in tower, influence the spray washing effect.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of integrated coupling device for flue gas desulfurization and dedusting is provided, adopt interior to jet tray, eddy flow and spraying method are combined, form the novel all-in-one desulfation dust-extraction device, thereby under the situation that guarantees high efficiency desulfurization, dedusting, reduce the internal circulating load of slurries, cut down the consumption of energy, and opereating specification is wideer.
The present invention is achieved by the following technical solutions, the present invention includes: tower body, tangential admission mouth, exhanst gas outlet, bottom eddy flow plate, interior to jet tray, spraying layer, following demist plate and last demister, wherein: the tangential admission mouth is positioned at the lower end side of tower body, bottom eddy flow plate, interior to jet tray, spraying layer, demist plate and last demister from bottom to top are set in parallel in tower body inside successively down, exhanst gas outlet is positioned at the top of tower body.
Described eddy flow plate is positioned at the below to jet tray, has removed the special-shaped overflow pipe of conventional eddy flow plate, leaves the space of 3-10mm between its outer rim and the tower wall;
Be provided with to jet tray in described: eject blade, center overflow pipe and gripper shoe muscle, wherein: the center overflow pipe is positioned at the central authorities to jet tray, some eject blades are with the oblique outer that is fixedly set in the center overflow pipe piecewise of regular polygon mode, and the gripper shoe muscle is fixedlyed connected with the two ends of each sheet eject blade.
The diameter of described center overflow pipe is 20%～40% of a gripper shoe muscle diameter.
The described eject blade and the elevation angle that horizontal plane is are 20 °～60 °, make the air-flow injection direction point to the center; The width of this eject blade is 20～120mm, and eject blade is made for whole plate cutting, panel beating or multiple-blade Combination Welding, and according to the size of every board diameter, the regular polygon limit number that blade is formed is 3-12.
The width of described gripper shoe muscle is 20～120mm;
Should in to jet tray will spray doctor solution on this plate and the doctor solution that flows down along the tower wall again in to injection, reach the effect of desulfurization and dedusting, its veneer desulfurization, efficiency of dust collection and bottom eddy flow plate are approaching;
Compared with prior art, the present invention utilizes the interior to jet tray of unique design, to spray, eddy flow method organic coupling, the interior multi-efficiency that has desulfurization and dedusting concurrently, improves the air-flow distribution and compile doctor solution to jet tray, make the device of being invented have the efficient desulfurizing and dust collecting effect, and obviously reduce liquid-gas ratio and gas-flow resistance.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is interior to the jet tray structural representation;
Among the figure: a is interior to the jet tray upward view; B is interior to the jet tray side view;
Wherein: in the 1 tangential gas approach, 2 tower bodies, 3 water film dedusting sections, 4 bottom eddy flow plates, 5 on jet tray, 6 spraying layers and nozzle, 7 times demist plates, 8 standby showers, 9 demister, 10 exhanst gas outlets, 11 doctor solution floss holes, 12 desulfuration recycle pumps, 13 center overflow pipes (having water seal), 14 eject blades and 15 gripper shoe muscle.
The specific embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment comprises: tangential gas approach 1, tower body 2, water film dedusting section 3, bottom eddy flow plate 4, interior to jet tray 5, spraying layer and nozzle 6, time demist plate 7, standby shower 8, last demister 9, exhanst gas outlet 10, doctor solution floss hole 11 and desulfuration recycle pump 12, wherein: the tangential admission mouth is positioned at the lower end side of tower body, bottom eddy flow plate, interiorly from bottom to top be set in parallel in tower body inside successively to jet tray, spraying layer, the first demist plate and the second demist plate, exhanst gas outlet is positioned at the top of tower body.
Described bottom eddy flow plate has been removed the special-shaped overflow pipe of conventional eddy flow plate, leaves the space of 6mm between its outer rim and the tower wall.
As shown in Figure 2, be provided with to jet tray 5 in described: center overflow pipe 13, eject blade 14 and gripper shoe muscle 15, wherein: center overflow pipe 13 is positioned at the central authorities to jet tray 5,42 eject blades 14 are divided into 7 layers so that the hexagon mode is oblique, successively be fixedly set in the outer of center overflow pipe 13, gripper shoe muscle 15 is fixedlyed connected with the two ends of each sheet eject blade 14.The limit number of the regular polygon of being made up of blade is 6.
The diameter of described center overflow pipe 13 is 30% of gripper shoe muscle 15 diameters.
Described eject blade 14 is 30 ° with the elevation angle that horizontal plane is, and makes the air-flow injection direction point to the center; The width of this eject blade 14 is 100mm, and eject blade 14 is made for the multiple-blade Combination Welding.
The width of described gripper shoe muscle 15 is 100mm;
Should in to jet tray 5 will spray doctor solution on this plate and the doctor solution that flows down along the tower wall again in to injection, reach the effect of desulfurization and dedusting, its veneer desulfurization, efficiency of dust collection and bottom eddy flow plate 4 are approaching;
Present embodiment is realized flue gas desulfurization by following flow process:
The flue gas that contains flue dust and sulfur dioxide tangentially enters the absorption tower by gas approach 1, and carries out pre-dedusting in the moisture film district 3 on absorption tower, wherein the doctor solution moisture film via around the bottom eddy flow plate of upper strata and the annular space between the tower wall formed.Then, air communication is crossed the bottom eddy flow plate 4 of bottom, and carry out injecting type and contact and carry out desulfurization and dedusting with the liquid lamella on the bottom eddy flow plate, the doctor solution on the bottom eddy flow plate is by flowing on its blind plate to the center of jet tray overflow pipe in the upper strata, again to around spray diffusion.Afterwards, air-flow continues to rise to jet tray 5 through interior again, and with spraying in the doctor solution course on this plate, proceeds desulfurization and dedusting in course of injection.In on jet tray doctor solution mainly from the direct sprinkling of spraying layer and the liquid that has Yan Tabi to stay, doctor solution is pooled to the center overflow pipe through interior to injection, and flows on the blind plate of lower floor's bottom eddy flow plate.Thereafter, air-flow is through spray section, carries out gas-liquid counter current with desulfurization drop that the spraying layer nozzle is sprayed and contact the continuation sweetening process.After this, demist plate and demist plate carried out abundant demist under flue gas passed through again, and flowed out the absorption tower through gas vent.In said process, doctor solution is to use special-purpose desulfuration recycle pump to be transported to spraying layer.
The checking of present embodiment technique effect is specific as follows:
Utilize the test tower body of an internal diameter 300mm, by the rotational flow and spray integrated apparatus that is combined into shown in Figure 1.Testing used exhaust gas volumn is 1000m
3/ h, flue-gas temperature is 90 ℃, inlet flue gas SO
2Concentration is 2600mg/Nm
3, smoke content 1400mg/Nm
3
Remove to plate earlier, only use one deck spraying layer and one deck bottom eddy flow plate interior, by spraying layer in tower for doctor solution, be 9 at liquid pH value, liquid-gas ratio is 2.0L/m
3Situation under, the desulfuration efficiency that records is about 82%, efficiency of dust collection is 95%.Full tower gas-flow resistance is only about 780Pa.
Under the kindred circumstances, if insert between bottom eddy flow plate and the spraying layer to jet tray interior, the desulfuration efficiency under the then close condition is reduced to about 96%, and full tower gas-flow resistance rises to 900 left and right sides Pa.This shows, be used in combination with bottom eddy flow plate and spraying technique to jet tray, can significantly improve the degree of purification of flue gas interior.
At the coal-burning boiler of 1 20t/h evaporation capacity, the design exhaust gas volumn is 55000m
3/ h, flue-gas temperature is 150 ℃, inlet flue gas SO
2Concentration reaches 2200mg/Nm
3, smoke content 1200mg/Nm
3Apparatus of the present invention have adopted device shown in Figure 1 according to actual condition, and the tower internal diameter is 2200mm.Adopt the Sodium double alkali method flue gas desulfurization technology.The blade elevation angle of bottom eddy flow plate is 28 °, and percent opening is 32%; Interior is 32 ° to the elevation angle of jet tray, and percent opening is 36%.
When boiler load is 90%, be 1.8L/m at liquid-gas ratio
3Situation under, the desulfuration efficiency that records is 96.3%, (outlet dust contained flue gas concentration is lower than 50mg/Nm to efficiency of dust collection greater than 97%
3).Full tower gas-flow resistance is only about 800Pa.
Claims (8)
1, a kind of integrated coupling device for flue gas desulfurization and dedusting, comprise: tower body, the tangential admission mouth, exhanst gas outlet, bottom eddy flow plate, interior to jet tray, spraying layer, the first demist plate and the second demist plate, the tangential admission mouth is positioned at the lower end side of tower body, bottom eddy flow plate, interior to jet tray, spraying layer, the first demist plate and the second demist plate from bottom to top are set in parallel in tower body inside successively, exhanst gas outlet is positioned at the top of tower body, it is characterized in that: interiorly be provided with: eject blade to jet tray, center overflow pipe and gripper shoe muscle, wherein: the center overflow pipe is positioned at the central authorities to jet tray, some eject blades are with the oblique outer that successively is fixedly set in the center overflow pipe of polygon mode, and the gripper shoe muscle is fixedlyed connected with the two ends of each sheet eject blade.
2, integrated coupling device for flue gas desulfurization and dedusting according to claim 1 is characterized in that, described bottom eddy flow plate has been removed the special-shaped overflow pipe of conventional eddy flow plate, leaves the space of 3-10mm between its outer rim and the tower wall.
3, integrated coupling device for flue gas desulfurization and dedusting according to claim 1 is characterized in that, described interior diameter to the center of jet tray overflow pipe is 20%～40% of a gripper shoe muscle diameter.
4, integrated coupling device for flue gas desulfurization and dedusting according to claim 1 is characterized in that, is 20 °～60 ° to the eject blade of jet tray and the elevation angle that horizontal plane is in described.
5, integrated coupling device for flue gas desulfurization and dedusting according to claim 1 is characterized in that, is 20～120mm to the width of the eject blade of jet tray in described.
6, integrated coupling device for flue gas desulfurization and dedusting according to claim 1 is characterized in that, described interior eject blade to jet tray is made for whole plate cutting, panel beating or multiple-blade Combination Welding.
7, integrated coupling device for flue gas desulfurization and dedusting according to claim 1 is characterized in that, is 20～120mm to the width of the gripper shoe muscle of jet tray in described.
8, integrated coupling device for flue gas desulfurization and dedusting according to claim 1 is characterized in that, is 3-12 to the regular polygon limit number that the blade of jet tray is formed in described.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100537400A CN101584957B (en) | 2009-06-25 | 2009-06-25 | Integrated coupling device for flue gas desulfurization and dedusting |
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|---|---|---|---|
| CN2009100537400A CN101584957B (en) | 2009-06-25 | 2009-06-25 | Integrated coupling device for flue gas desulfurization and dedusting |
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| CN101584957A true CN101584957A (en) | 2009-11-25 |
| CN101584957B CN101584957B (en) | 2011-01-26 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941010A (en) * | 2012-11-26 | 2013-02-27 | 广东依科电力技术有限公司 | Swirl board scrubber desulfurization system and working method thereof |
| CN103239982A (en) * | 2013-05-24 | 2013-08-14 | 上海交通大学 | Method for dedusting and desulfurizing catalytic-cracking oil refining regenerated flue gas |
| CN105056679A (en) * | 2015-08-11 | 2015-11-18 | 中国五环工程有限公司 | Method and device for removing PM2.5 (particulate matter) in WFGD (wet flue gas desulfurization) process |
| CN105435610A (en) * | 2015-12-03 | 2016-03-30 | 上海交通大学 | Integrated multiple-effect device meeting requirements for deep desulfurization and denitrification and dust removal of industrial flue gas |
| CN108465324A (en) * | 2018-03-30 | 2018-08-31 | 朱茂祖 | A kind of metallurgical factory's emission-control equipment |
| CN112619377A (en) * | 2020-12-18 | 2021-04-09 | 广东惠智通能源环保发展有限公司 | Exhaust gas purification system |
-
2009
- 2009-06-25 CN CN2009100537400A patent/CN101584957B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941010A (en) * | 2012-11-26 | 2013-02-27 | 广东依科电力技术有限公司 | Swirl board scrubber desulfurization system and working method thereof |
| CN103239982A (en) * | 2013-05-24 | 2013-08-14 | 上海交通大学 | Method for dedusting and desulfurizing catalytic-cracking oil refining regenerated flue gas |
| CN103239982B (en) * | 2013-05-24 | 2015-05-20 | 上海交通大学 | Method for dedusting and desulfurizing catalytic-cracking oil refining regenerated flue gas |
| CN105056679A (en) * | 2015-08-11 | 2015-11-18 | 中国五环工程有限公司 | Method and device for removing PM2.5 (particulate matter) in WFGD (wet flue gas desulfurization) process |
| CN105056679B (en) * | 2015-08-11 | 2017-03-01 | 中国五环工程有限公司 | PM in process of wet desulphurization2.5Removal methods and its device |
| CN105435610A (en) * | 2015-12-03 | 2016-03-30 | 上海交通大学 | Integrated multiple-effect device meeting requirements for deep desulfurization and denitrification and dust removal of industrial flue gas |
| CN108465324A (en) * | 2018-03-30 | 2018-08-31 | 朱茂祖 | A kind of metallurgical factory's emission-control equipment |
| CN112619377A (en) * | 2020-12-18 | 2021-04-09 | 广东惠智通能源环保发展有限公司 | Exhaust gas purification system |
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| CN101584957B (en) | 2011-01-26 |
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