CN201313032Y - Limestone/lime-gypsum wet flue gas desulfurization device - Google Patents
Limestone/lime-gypsum wet flue gas desulfurization device Download PDFInfo
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- CN201313032Y CN201313032Y CNU2008202257956U CN200820225795U CN201313032Y CN 201313032 Y CN201313032 Y CN 201313032Y CN U2008202257956 U CNU2008202257956 U CN U2008202257956U CN 200820225795 U CN200820225795 U CN 200820225795U CN 201313032 Y CN201313032 Y CN 201313032Y
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Abstract
The utility model discloses a limestone/lime-gypsum wet flue gas desulphurization device. The device comprises an absorption tower body unit, a limestone/lime grout spraying unit, a flue gas uniform distribution unit, a defogger unit, an oxidized air uniform distribution and supply unit, a grout zoning unit, a pulse suspension unit and a reaction tank, which are of general arrangement. The device is characterized in that the defogger unit consists of two-stage defogging fillers, a flushing system and a bracket; the two-stage defogging fillers and the flushing system are arranged on the bracket on the first layer of the tower. The limestone/lime-gypsum wet flue gas desulfurization device has the characteristics of high desulphurization effect, compact equipment, small occupied area, less investment, stable operation, low grout circulation load, small liquid gas ratio, low operation expense, reasonable design, simple structure, easy manufacturing, convenient maintenance, safe and reliable operation, etc.
Description
Affiliated technical field
The utility model relates to a kind of process for flue gas desulfurization by limestone/lime-gypsum wet device, especially a kind of flue gas desulphurization engineering that is applied to, can realize operation maintenance, the process for flue gas desulfurization by limestone/lime-gypsum wet device of, low consumption efficient to guarantee, environmental protection, safe operation belongs to the electric power factory equipment technical field.
Background technology
At present, desulfurizer commonly used adopts dry method or wet method more in the flue gas desulphurization technology.And the wet desulphurization technology is by the main sulfur removal technology technology of most of large-scale thermal power machine group extensive use.The reaction principle of wet desulphurization technology is the same basically, and is also similar on system forms, and main difference is on the pattern of desulfurizer of its core and the structure characteristics are arranged respectively, thereby its desulfuration efficiency and consuming also has nothing in common with each other.Desulfurizer comes branch to mainly contain from structure: packed tower, plate column, liquid column tower, spray column (void tower) and bubble tower.Spray column has not subregion tower, subregion tower and two recycle column.Because spray column belongs to the void tower technology, flue gas resistance is little, and applicability is good, thereby has obtained widespread usage.Simultaneously, also there are shortcomings such as investment is high, operating cost (consumption of energy consumption and absorbent etc.) is high, efficient is low in existing this device.
In the world, from nineteen thirty first commercialization flue gas desulphurization system since the Ahmedabad Lu Si of Britain power plant operation, research and the commercial application to flue gas desulfurization technique obtained fast development at twentieth century in the world.At the initial stage seventies, the U.S. and Japan have begun the construction peak of desulfurizer, have developed a series of wet desulphurization technology.The particularly German biggest market that becomes desulfurizer of the mid-80, Europe.To nineteen ninety, Yun Hang flue gas desulfur device (with volumeter) is over half in the U.S. in the world, secondly is Germany, and the 3rd is Japan.Countries such as Britain, Holland, Canada, Denmark and Italy build flue gas desulfur device in succession.The nineties begins, and countries and regions such as the Thailand in Asia, India, Korea S, Taiwan also begin development and build flue gas desulfur device.Nineteen nineties, China begins to develop the construction of flue gas desulfur device, so far near the peak that reaches construction.But the foreign technology that is mostly to introduce at the flue gas desulfur device that China successfully puts into operation, undertake the construction of by domestic corporation, the slower development of own technology, still rare with the wet flue gas desulfurizer that the technology production of domestic independent development puts into operation at present.
At present, the wet process of FGD technology contains aforesaid many technology and dissimilar desulfurizers in the world, but all exists the contradiction between desulfuration efficiency and the energy, the resource consumption.
The utility model content
In order to overcome the deficiency of existing spray column desulfurizer, technical problem to be solved in the utility model is, a kind of efficient low-consume process for flue gas desulfurization by limestone/lime-gypsum wet device is provided, to solve this contradiction between the desulfuration efficiency and the energy, the resource consumption, improve the performance of wet flue gas desulfurizer.
For solving the problems of the technologies described above, the technical scheme that process for flue gas desulfurization by limestone/lime-gypsum wet device of the present utility model is taked is, a kind of process for flue gas desulfurization by limestone/lime-gypsum wet device, by the absorption tower body unit, limestone/lime slurries spray unit, the flue gas even distribution unit, demister unit, the uniform feed unit of oxidation air, the slurries zoning unit, pulse suspension unit and reaction tank are provided with composition according to routine, wherein, demister unit is arranged on intrinsic top, absorption tower, be communicated with exhaust outlet and exhanst gas outlet, limestone/lime slurries spray unit, the flue gas even distribution unit, the uniform feed unit of oxidation air, the slurries zoning unit, pulse suspension unit and reaction tank from top to bottom are set in sequence in the absorption tower body interior of demister unit below successively, and interconnect successively; Its demister unit is made up of two-stage demist filler, rinse-system and support, and two-stage demist filler, rinse-system all are arranged on one deck tower inner support.Demister unit can will be removed through two-stage demist filler through the drop that carries in the flue gas of spraying layer, can guarantee that water droplet content is not more than 75mg/Nm in the desulfurizer outlet flue gas
3The demister flusher can in time wash demister, normally moves and reduces its flue gas resistance to guarantee demister.
Above-mentioned process for flue gas desulfurization by limestone/lime-gypsum wet device, its flue gas even distribution unit is made up of 2 layers of flue gas even distribution plate that are attached on the body wall of absorption tower.
Above-mentioned process for flue gas desulfurization by limestone/lime-gypsum wet device, its pulse suspension unit comprise circulating pump and the pipeline that is attached thereto, and pipeline feeds in the interior slurries of reaction tank.Circulating pump circulates the slurries in the reaction tank, makes the solid that suspends wherein keep good suspended state, guarantees the carrying out that the interior chemical reaction of reaction tank is good and slurries are not precipitated.
During this device operation, the limestone/lime slurries spray in the absorption tower through limestone/lime slurries spray unit, under the effect of flue gas even distribution unit, abundant and flue gas haptoreaction is removed harmful substances such as sulfur in smoke, flue dust, finish chemical reaction and finally form the calcium sulphate dihydrate crystallization in reaction tank and separate out, the gypsum slurries that reacts completely is discharged the absorption tower by pump and is entered the gypsum subsequent treatment process; Clean flue gas is discharged the absorption tower after removing the moisture content that carries through demister unit.
This device adopts single loop absorption tower technology, incorporated that flue gas even distribution in the tower, the double-deck filler flue gas of mono-layer propping carry that drop is removed, the reaction zone oxidation air is uniform and reaction tank in proprietary technology such as slurries subregion, formed efficient wet flue gas desulfurizer.Realized that not only the Wetting flue gas desulfur device has improved activity and contact area that solution-air absorbs, strengthened the gas-liquid mass transfer function, had uniform flue gas to flow, prevent the effect of fouling simultaneously again.This device has the desulfuration efficiency height, facility compact, floor space is little, reduced investment, stable operation, characteristics such as the slurries internal circulating load is low, and liquid-gas ratio is little, and operating cost is low, and reasonable in design, simple in structure, be easy to make, be convenient to safeguard, safe and reliable to operation.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the structural representation of this process for flue gas desulfurization by limestone/lime-gypsum wet device;
Fig. 2 is the structural representation that demister flusher of the present utility model amplifies;
Fig. 3 is the structural representation that pulse suspension device of the present utility model amplifies.
The specific embodiment
Fig. 1 is the structural representation of this process for flue gas desulfurization by limestone/lime-gypsum wet device, wherein, and 1, the absorption tower body, 2, limestone/lime slurries spraying layer, 3, flue gas even distribution device, 4, demister, 5, demister flusher, 6, the uniform feedway of oxidation air, 7, the slurries partitioning device, 8, pulse suspension device, 9, reaction tank, 10, smoke inlet, 11, exhanst gas outlet, 12, the absorption tower overflow pipe, 13, the absorption tower evacuated tube, 14, steam vent, 15, manhole.
As Fig. 1, Fig. 2 and shown in Figure 3, this process for flue gas desulfurization by limestone/lime-gypsum wet device is made up of according to routine setting absorption tower body unit 1, limestone/lime slurries spray unit 2, flue gas even distribution unit 3, demister unit 4, the uniform feed unit 6 of oxidation air, slurries zoning unit 7, pulse suspension unit 8 and reaction tank 9.Wherein, demister unit 4 is arranged on the top in the absorption tower body 1, be communicated with steam vent 14 and exhanst gas outlet 11, limestone/lime slurries spray unit 2, flue gas even distribution unit 3, the uniform feed unit 6 of oxidation air, slurries zoning unit 7, pulse suspension unit 8 and reaction tank 9 from top to bottom are set in sequence in absorption tower body 1 inside of demister unit 4 belows successively, and interconnect successively; Absorption tower body 1 is provided with smoke inlet 10, exhanst gas outlet 11, absorption tower overflow pipe 12, absorption tower evacuated tube 13, steam vent 14, manhole 15, and its each part mentioned above all connects or welding by usual way.Demister unit 4 is made up of two-stage demist filler 17, rinse-system 5 and support 16, and two-stage demist filler 17, rinse-system 5 all are arranged on one deck tower inner support 16.Its flue gas even distribution unit 3 is made up of 2 layers of flue gas even distribution plate 20 that are attached on the body wall of absorption tower.Its pulse suspension unit 8 comprises circulating pump 21 and the pipeline 22 that is attached thereto, in the slurries that pipeline 22 feeds in the reaction tank 9.
This process for flue gas desulfurization by limestone/lime-gypsum wet device, be made up of absorption tower body unit 1, limestone/lime slurries spray unit 2, flue gas even distribution unit 3, demister unit 4, the uniform feed unit 6 of oxidation air, slurries zoning unit 7, pulse suspension unit 8, wherein absorption tower main unit 1 is this device main body structure division; Limestone/lime slurries spray unit 2 is that the limestone/lime slurries that will configure are injected in the tower, form slurry layer, form adverse current with flue gas in the tower, pernicious gas such as sulfur in smoke reacts to generate with chemical substance in the slurries and is with the calcium sulfite or the calcium sulfate of the crystallization water to be removed; Flue gas even distribution unit 3 is that flue gas even distribution device is set in the absorption tower, flue gas is evenly distributed on the cross section in tower fully to contact with slurry layer, the slurries secondary drip washing flue gas that Yan Tabi is flowed down, thereby effectively avoiding forming no slurries district along wall in the tower escapes flue gas, and form new solution-air contact interface, improved the activity that solution-air absorbs, it is long-pending to have increased the solution-air contact surface, guarantees SO
2Removal efficiency is not less than 98%, and it also has good removal effect to the flue dust in the flue gas.Demister unit 4 is made up of two-stage demist filler 17, demister rinse-system 5, be installed in jointly on one deck tower inner support 16, the drop that carries in will the flue gas through spraying layer 2 is removed through two-stage demist filler 17, to guarantee that water droplet content is not more than 75mg/Nm in the desulfurizer outlet flue gas
3The uniform feed unit 6 of oxidation air is arranged in the reaction tank 9, is responsible for and nozzle is formed by oxidation air, oxidation air can be supplied in the reaction tank 9 equably, separates out thereby make calcium sulfite in the slurries be completely oxidized to the calcium sulphate dihydrate crystallization; The effect of slurries zoning unit 7 is that reaction tank 9 is divided into reaction zone and zoneofoxidation, in the reaction zone slurries fully with wash away the sulfur dioxide gas that gets off and react, slurries are accepted the even air that the uniform feed unit of oxidation air provides in the zoneofoxidation, separate out thereby make calcium sulfite fully be oxidized into the calcium sulphate dihydrate crystallization; Pulse suspension unit 8 is by pump 21 solid in the slurries in the reaction tank 9 to be kept good suspended state, and the chemical reactions in the assurance reaction tank 9 well carry out and slurries are not precipitated.The effect of the uniform feed unit 6 of oxidation air, slurries zoning unit 7, pulse suspension unit 8 is to make slurries effectively with sulfur in smoke generation absorption reaction and make the abundant oxidation of unsettled calcium sulfite in the slurries, not only guaranteed effective removal sulfur in smoke, also guarantee to discharge the gypsum slurries purity of desulfurizer, improved the follow-up gypsum dehydration performance and the recycle value of gypsum.
During this device work, boiler smoke, mists and clouds gas enters the absorption tower by smoke inlet 10, through flue gas even distribution device 3 flue gas is evenly distributed on the cross section of absorption tower.Reaction tank 9 sodalime stone/lime slurries are sent into spraying layer 2 by pump 21, flue gas reacts through spraying layer 2 and slurries, with Impurity removals such as sulfur in smoke, flue dust, demister 4 is removed the droplet of carrying secretly in the flue gas, and the flue gas after up to standard is discharged through exhanst gas outlet 11.Demister flusher 5 is flushing demisters 4 in time, normally move and reduce its flue gas resistance to guarantee demister 4.The uniform feedway 6 of oxidation air will contain the oxygen air and blast reaction tank 9, make that the calcium sulfite oxidation in the slurries becomes the dihydrate gypsum crystallization to separate out in the pond.Limestone/lime flow inlet 9 is supplied fresh slurries in the absorption tower, to keep slurry activity, guarantee the absorption of sulfur dioxide is removed.Slurries partitioning device 7 is that reaction tank 9 is divided into reaction zone and zoneofoxidation, guarantees the absorption removal efficient and the dihydrate gypsum crystallization of sulfur dioxide are separated out.Pulse suspension device 8 keeps slurries to be in suspended state all the time and unlikely precipitation.Absorption tower overflow pipe 12, absorption tower evacuated tube 13, steam vent 14, manhole 15 are servicing unit.
This process for flue gas desulfurization by limestone/lime-gypsum wet device when reducing overall cost, reducing operating cost, improves the desulfuration efficiency of package unit, reduces the slurries internal circulating load, reduces liquid-gas ratio, thereby realizes efficient, purpose of energy saving.Its key technical indexes: compare with the absorption tower of existing equal disposal ability, its diameter is little by 10～15%; Highly low 0.5～1.0m, overall cost reduces by 10～20%; Desulfuration efficiency is stabilized in more than 98%; Under identical desulfuration efficiency situation, can reduce by 20～30% recycle slurry liquid measure; Liquid-gas ratio is not more than 11L/Nm
3Therefore it to have a volume little, reduced investment, characteristics such as operating cost is low, and is energy-efficient.
Claims (3)
1, a kind of process for flue gas desulfurization by limestone/lime-gypsum wet device, by the absorption tower body unit, limestone/lime slurries spray unit, the flue gas even distribution unit, demister unit, the uniform feed unit of oxidation air, the slurries zoning unit, pulse suspension unit and reaction tank are provided with composition according to routine, its demister unit is arranged on intrinsic top, absorption tower, be communicated with exhaust outlet and exhanst gas outlet, limestone/lime slurries spray unit, the flue gas even distribution unit, the uniform feed unit of oxidation air, the slurries zoning unit, pulse suspension unit and reaction tank from top to bottom are set in sequence in the absorption tower body interior of demister unit below successively, and interconnect successively; It is characterized in that: its demister unit is made up of two-stage demist filler, rinse-system and support, and two-stage demist filler, rinse-system all are arranged on one deck tower inner support.
2, process for flue gas desulfurization by limestone/lime-gypsum wet device according to claim 1 is characterized in that: its flue gas even distribution unit is made up of 2 layers of flue gas even distribution plate that are arranged on the body wall of absorption tower.
3, process for flue gas desulfurization by limestone/lime-gypsum wet device according to claim 1 is characterized in that: its pulse suspension unit comprises circulating pump and the pipeline that is attached thereto, and pipeline feeds in the interior slurries of reaction tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202257956U CN201313032Y (en) | 2008-11-13 | 2008-11-13 | Limestone/lime-gypsum wet flue gas desulfurization device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202257956U CN201313032Y (en) | 2008-11-13 | 2008-11-13 | Limestone/lime-gypsum wet flue gas desulfurization device |
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| CN201313032Y true CN201313032Y (en) | 2009-09-23 |
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| CNU2008202257956U Expired - Fee Related CN201313032Y (en) | 2008-11-13 | 2008-11-13 | Limestone/lime-gypsum wet flue gas desulfurization device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101879409A (en) * | 2010-07-15 | 2010-11-10 | 华南理工大学 | Electrical ultrasonic atomization wet desulfurization spray nozzle and application thereof |
| CN101920162A (en) * | 2010-07-15 | 2010-12-22 | 华南理工大学 | Smoke power-type wet desulphurization ultrasonic atomization device and application thereof |
| CN103955751A (en) * | 2014-04-11 | 2014-07-30 | 国家电网公司 | Method for predicting multi-element nonlinear limestone-gypsum wet desulphurization efficiency |
| CN104307335A (en) * | 2014-10-16 | 2015-01-28 | 太仓东能环保设备有限公司 | Novel packless desulfurizing tower |
-
2008
- 2008-11-13 CN CNU2008202257956U patent/CN201313032Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101879409A (en) * | 2010-07-15 | 2010-11-10 | 华南理工大学 | Electrical ultrasonic atomization wet desulfurization spray nozzle and application thereof |
| CN101920162A (en) * | 2010-07-15 | 2010-12-22 | 华南理工大学 | Smoke power-type wet desulphurization ultrasonic atomization device and application thereof |
| CN101920162B (en) * | 2010-07-15 | 2012-08-22 | 华南理工大学 | Smoke power-type wet desulphurization ultrasonic atomization device and application thereof |
| CN101879409B (en) * | 2010-07-15 | 2012-10-31 | 华南理工大学 | Electrical ultrasonic atomization wet desulfurization spray nozzle and application thereof |
| CN103955751A (en) * | 2014-04-11 | 2014-07-30 | 国家电网公司 | Method for predicting multi-element nonlinear limestone-gypsum wet desulphurization efficiency |
| CN103955751B (en) * | 2014-04-11 | 2017-02-08 | 国家电网公司 | Method for predicting multi-element nonlinear limestone-gypsum wet desulphurization efficiency |
| CN104307335A (en) * | 2014-10-16 | 2015-01-28 | 太仓东能环保设备有限公司 | Novel packless desulfurizing tower |
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Granted publication date: 20090923 Termination date: 20111113 |