CN205127726U - Double tower is two -way to spray multicycle desulfurization absorption tower - Google Patents
Double tower is two -way to spray multicycle desulfurization absorption tower Download PDFInfo
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- CN205127726U CN205127726U CN201520732885.4U CN201520732885U CN205127726U CN 205127726 U CN205127726 U CN 205127726U CN 201520732885 U CN201520732885 U CN 201520732885U CN 205127726 U CN205127726 U CN 205127726U
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Abstract
The utility model provides a double tower is two -way to spray multicycle desulfurization absorption tower, include: a king -tower tower body, inside are equipped with a multi -layer spraying device, multi -layer spraying device includes: an one -way layer that sprays, and be located the one -way a plurality of two -way layer that sprays that sprays layer below, one assists the tata body, intercommunication multi -layer spraying device's many thick liquid circulating lines, a king -tower thick liquid pond of the partly intercommunication king -tower tower body of thick liquid circulating line, another part intercommunication is assisted one of the tata body and is assisted tower thick liquid pond, every all be equipped with supercharging device on the thick liquid circulating line. The thick liquid coverage rate that the messenger sprayed the layer reaches as high as 285%, lets the abundant contact reaction of sulfur dioxide in gypsum slurry and the flue gas, and the sulfur dioxide concentration that will discharge in the flue gas reduces to below the 25mgNm3, reaches the standard requirement of " minimum discharge ".
Description
Technical field
The utility model relates to environmental technology field, particularly relates to wet process of FGD equipment, is specifically related to the multicycle desulfuration absorbing tower of a kind of double tower Bidirectional spray.
Background technology
Along with China's economic development, electricity needs continues to increase, and haze long lasting effect, control PM2.5 refer to agenda.Local government, electric power enterprise propose one after another " minimum discharge ", " near-zero release ", " reaching combustion engine discharge standard " construction or transformation requirement." minimum discharge ", requires to realize the discharge of scientific guidance Thermal Power Generation Industry sustainable development ultra-clean.
Air Pollutant Emission of keeping under strict control that State Development and Reform Commission prints and distributes " coal electricity energy-saving and emission-reduction upgrading and transformation action plan (2014-2020) ".Newly-built Thermal generation unit (being contained in the unit built and included national construction of fire and electricity planning with project in) answers the advanced high-efficiency desulfurization of synchronized construction, denitration and dust removal installation, must not arrange gas bypass passage.
The eastern region newly-built Thermal generation unit Air Pollutant Emission concentration such as (Liaoning, Beijing, Tianjin, Hebei, Shandong, Shanghai, Jiangsu, Zhejiang, Fujian, Guangdong, Hainan 11 provinces and cities) substantially reach gas turbine group emission limit (namely under benchmark oxygen content 6% condition, flue dust, sulfur dioxide, discharged nitrous oxides concentration respectively not higher than 10,35,50mg/Nm
3).
The middle part new-built unit such as (Heilungkiang, Jilin, Shanxi, Anhui, Hubei, Hunan, Henan, Jiangxi 8 provinces) in principle close to or reach gas turbine group emission limit, encourage west area new-built unit close to or reach gas turbine group emission limit.Support that synchronously carrying out atmosphere pollution combination and cooperation removes, and reduces the pollutant emissions such as sulfur dioxide, mercury, arsenic.
Current existing wet method fume desulfurizing system is under the coal-fired sulfur content of reality reaches the condition of 3.0%, and entrance sulfur dioxide (namely under benchmark oxygen content 6% condition, mark state, dry state) concentration is 6500mg/Nm
3time, outlet SO 2 from fume concentration of emission can be made lower than 200mg/Nm
3, system desulfuration efficiency reaches more than 97%.
Visible, existing desulfurization equipment cannot meet sulfur dioxide (SO
2) " minimum discharge ", namely concentration of emission is no more than 35mg/Nm
3emission request.
How to improve desulfuration efficiency, ensure under the existing coal quantity condition of China, meeting the discharge standard of " minimum discharge ", is that those skilled in the art need the technical problem of solution and the important research direction of Wet Flue Gas Desulfurization Technology badly.
Utility model content
For the problems referred to above, the purpose of this utility model is to provide a kind of double tower Bidirectional spray multicycle desulfuration absorbing tower, by improving gypsum slurries coverage rate, makes the abundant haptoreaction of the sulfur dioxide in gypsum slurries and flue gas, improves removal efficiency.
For reaching above-mentioned purpose, the concrete technical scheme that the utility model is taked is:
The multicycle desulfuration absorbing tower of a kind of double tower Bidirectional spray, comprising:
One king-tower tower body, inside is provided with a Multi-layer sprinkling device, and described Multi-layer sprinkling device comprises: a unidirectional spraying layer, and is positioned at the multiple Bidirectional spray layers below described unidirectional spraying layer;
One auxiliary tower tower body;
Be communicated with many serum recycle pipelines of Multi-layer sprinkling device, a described serum recycle pipeline part is communicated with a king-tower slurry pool of king-tower tower body; Another part is communicated with an auxiliary tower slurry pool of auxiliary tower tower body; Serum recycle pipeline described in every root is equipped with supercharging device.
Further, the quantity of described Bidirectional spray layer is 2-5 layer.
Further, described Bidirectional spray layer comprises spray piping and is distributed in the Bidirectional nozzle on spray piping.
Further, the specification of described Bidirectional nozzle is DN80-120mm, average jet nozzle fluid flow 1000-1061 (-2% /+5%) L/min.
Further, described Bidirectional spray layer by layer between distance be 2-3m, preferred 2.5m.
Further, the distance between described unidirectional spraying layer and most last layer Bidirectional spray layer is 2-3m, preferred 2.5m.
Further, the flue gas flow in described tower body and the liquid-gas ratio between described many serum recycle ducted slurries global cycle amount are for being not less than 30L/m
3.
Further, also comprise a smoke inlet, between described smoke inlet and basecoat Bidirectional spray layer, be provided with grid current-sharing module.
Further, described grid current-sharing module comprises multiple screen; Described screen arranged crosswise forms multiple equal discharge orifice; Described screen thickness is 2.2-3.5mm; Described grid current-sharing module height is 0.5-1.2m; Described equal discharge orifice is of a size of 0.02-0.065m
2.
Further, described king-tower slurry pool is communicated with described auxiliary tower slurry pool.
By taking technique scheme, the utility model realizes Bidirectional spray, coordinate the auxiliary tower slurry pool of configuration simultaneously, and take each spraying layer to be used alone a circulating line, every root circulating line configures independent supercharging device, forms multi cycle pattern, to ensure the serum recycle amount needed for Bidirectional spray, make the slurries coverage rate of spraying layer reach as high as 285%, allow the abundant haptoreaction of sulfur dioxide in gypsum slurries and flue gas, the sulfur dioxide concentration in discharge flue gas is reduced to 25mg/Nm
3below, the standard-required of " minimum discharge " is reached.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation in one embodiment.
Description of reference numerals: 1-king-tower; The auxiliary tower of 2-; 3-Bidirectional spray layer; The unidirectional spraying layer of 4-; 5-grid current-sharing module; 6-king-tower circulating line; The auxiliary tower circulating line of 7-; 8-smoke inlet; 9-exhanst gas outlet.
Detailed description of the invention
For making above-mentioned feature and advantage of the present utility model become apparent, special embodiment below, and coordinate institute's accompanying drawing to be described in detail below.
As shown in Figure 1, the multicycle desulfuration absorbing tower of double tower Bidirectional spray of the present utility model, comprise: king-tower 1, its tower body inside is provided with a Multi-layer sprinkling device, and described Multi-layer sprinkling device comprises: unidirectional spraying layer 4 and the multiple Bidirectional spray layers 3 be positioned at below unidirectional spraying layer 4; Auxiliary tower 2, the slurry pool in its tower body is communicated with the slurry pool in the tower body of king-tower 1.
Be communicated with many serum recycle pipelines of Multi-layer sprinkling device, a described serum recycle pipeline part is king-tower circulating line 6, is communicated with the king-tower slurry pool of king-tower 1 tower body; Another part is auxiliary tower circulating line 7, is communicated with the auxiliary tower slurry pool of auxiliary tower 2 tower body; Serum recycle pipeline described in every root is equipped with supercharging device.Described supercharging device is optional mud booster pump such as.
Wherein, the quantity of Bidirectional spray layer 3 can be selected from as 2-5 layer according to operating mode, is not limited to 4 shown in Fig. 1 layer.Bidirectional spray layer 3 comprises spray piping and is distributed in the Bidirectional nozzle on spray piping.The specification of described Bidirectional nozzle is DN80-120mm, average jet nozzle fluid flow 1000-1061 (-2% /+5%) L/min.Bidirectional nozzle advantage and effect be have flow large, reduce nozzle quantity, large unimpeded aperture reduces the risk of spray nozzle clogging, resistance is little, it is little to wear and tear, life-span length, low maintenance, lime stone slurry fully contact with the sulfur dioxide in flue gas, then cannot realize same function as directly installed the contrary one-way sprayer of above-below direction at shower, the having a big risk of spray nozzle clogging can be caused, resistance is large, wearing and tearing are large, the life-span is short, high maintenance amount defect.
Bidirectional spray layer by layer between distance be 2-3m, preferred 2.5m.Distance between unidirectional spraying layer 4 and most last layer Bidirectional spray layer 3 is for being 2-3m, preferred 2.5m.Arranging interlamellar spacing so mainly makes absorption tower volume will ensure the sufficient slurries time of staying, and stock tank should ensure that under any circumstance slurries are not less than 4min in the time of staying on absorption tower.4min is not less than containing sulfur dioxide flue gas and slurries sufficient reaction time.
Flue gas flow in described tower body and the liquid-gas ratio (volume) between described many serum recycle ducted slurries global cycle amount are not little 30L/m
3, and in existing desulfuration absorbing tower, liquid-gas ratio (volume) is generally 15L/m
3.Coordinating the setting of Bidirectional spray by adjusting above-mentioned supercharging device, can guarantee to meet above-mentioned liquid-gas ratio, thus under same traffic conditions, making sulfur-containing smoke gas more abundant with contacting of slurries.
In addition, also comprise smoke inlet 8, between smoke inlet 8 and basecoat Bidirectional spray layer 3, be provided with grid current-sharing module 5.Grid current-sharing module 5 comprises multiple screen; Described screen arranged crosswise forms multiple equal discharge orifice; Described screen thickness is 2.2-3.5mm; Described grid current-sharing module height is 0.5-1.2m; Described equal discharge orifice is of a size of 0.02-0.065m
2.
Grid current-sharing module 5 coordinates Bidirectional spray and major-minor tower structure to distribute more even by flue gas flow field, the intervention of grid current-sharing module 5, make the distribution in flow field without dead angle, none-disk terminal, homogenising by force, eliminate the adverse effect of the stream field of the flow field whirlpool of absorption tower entrance side import inequality and industry.Further increase SO
2reactive absorption rate.
In addition, king-tower coordinates auxiliary tower to increase the total amount of slurries, the circulation timei of slurries is increased, the time that reacted slurries stop in tower also increases, ensure that the grace time generating gypsum deposition in slurries, make the gypsum deposition generated not add desulphurization circulating process, be convenient to directly remove.Improve the ability of slurries sulfur dioxide absorption.
To sum up, the utility model by major-minor tower structure and many serum recycle pipeline separately supercharging multi cycle pattern, coordinate Bidirectional spray, the coverage rate of the slurries in desulfuration absorbing tower can be made to reach more than 285%, coordinate the desulphurization reaction dead angle in grid current-sharing module elimination tower, bypass again, the sulfur dioxide concentration in discharge flue gas can be made to be reduced to 25mg/Nm
3below, the standard-required of " minimum discharge " is reached.
With actual case history, the utility model is described further below.
Embodiment 1:
For steam power plant 2 × 300MW Thermal generation unit of a reality, the application multicycle desulfuration absorbing tower of double tower Bidirectional spray as shown in Figure 1, flue gas flow is 1098684m
3/ h, entrance sulfur dioxide concentration is 3820mg/Nm
3, flue gas enters in tower body from smoke inlet, and after grid current-sharing module, flue gas flow field distribution is more even, and then, the gypsum slurries haptoreaction that flue gas and spraying layer spray, now, the liquid-gas ratio (volume) of the two is 30L/m
3, and flue gas, through making the distribution in flow field without dead angle, none-disk terminal, homogenising by force in spraying layer process, eliminates the adverse effect of the stream field of the flow field whirlpool of absorption tower entrance side import inequality and industry.
In order to reach desirable effect, need to ensure enough serum recycle amounts, serum recycle amount at least needs for 33000m
3/ h, in addition, in order to make every layer of Bidirectional spray layer all play maximum utility, serum recycle pipeline is respective supercharging, and supercharging device is the parameter of booster pump, described booster pump, and the flow of every platform pump is 6600m
3/ h, pressure is 2.5MP, lift is 31m, the multi cycle pattern of each self-loopa, and the ducted serum recycle amount of root serum recycle can be made to be evenly distributed.Multi cycle pattern serum recycle amount is comparatively large, and the limited volume of king-tower slurry pool, be generally 1500m
3, in order to meet slurries capacity requirement, and can not affect the integrally-built stability of desulfuration absorbing tower because of on the slurry pool structure of modification of tower body, arranging auxiliary tower, the capacity of auxiliary tower slurry pool is 700m
3, and the volume of auxiliary tower can be adjusted according to actual conditions.
Steam power plant 2 × 300MW coal fired generator set desulfurization minimum discharge construction embodiment, the parameter list of each several part is as follows:
By according to parameter configuration desulphurization system in upper table, and adjust supercharging device and realize aforementioned gas liquid ratio, the concentration of emission of sulfur dioxide can be reduced to 22.5-24.5mg/Nm
3.
Embodiment 2:
For another steam power plant 2 × 350MW Thermal generation unit, the application multicycle desulfuration absorbing tower of double tower Bidirectional spray as shown in Figure 1, flue gas flow is 1390000m
3/ h, entrance sulfur dioxide concentration is 3600mg/Nm
3, flue gas enters in tower body from smoke inlet, and after grid current-sharing module, the distribution of flue gas flue gas flow field is more even, and then, the gypsum slurries haptoreaction that flue gas and spraying layer spray, now, the liquid-gas ratio of the two is 30L/m
3, and flue gas, through making the distribution in flow field without dead angle, none-disk terminal, homogenising by force in spraying layer process, eliminates the adverse effect of the stream field of the flow field whirlpool of absorption tower entrance side import inequality and industry.
In order to reach desirable effect, need to ensure enough serum recycle amounts, serum recycle amount at least needs for 30000m
3/ h, in addition, in order to make every layer of Bidirectional spray layer all play maximum utility, serum recycle pipeline is respective supercharging, and supercharging device is the parameter of booster pump, described booster pump, and the flow of every platform pump is 6000m
3/ h, pressure is 2.5MP, and lift is 29m, the multi cycle pattern of each self-loopa, and the ducted serum recycle amount of root serum recycle can be made to be evenly distributed.Multi cycle pattern serum recycle amount is comparatively large, and the limited volume of king-tower slurry pool, be generally 1400m
3, in order to meet slurries capacity requirement, and can not affect the integrally-built stability of desulfuration absorbing tower because of on the slurry pool structure of modification of tower body, arranging auxiliary tower, the capacity of auxiliary tower slurry pool is 700m
3, and the volume of auxiliary tower can be adjusted according to actual conditions.
Steam power plant 2 × 350MW machine desulfurization minimum discharge construction embodiment, the parameter list of each several part:
By according to parameter configuration desulphurization system in upper table, and adjust supercharging device and realize aforementioned gas liquid ratio, the concentration of emission of sulfur dioxide can be reduced to 23.5-24.8mg/Nm
3.
To sum up, the utility model is by taking the pattern of Bidirectional spray, coordinate the auxiliary tower slurry pool of configuration simultaneously, and take each spraying layer to be used alone a circulating line, every root circulating line configures independent supercharging device, forms multi cycle pattern, to ensure the serum recycle amount needed for Bidirectional spray, make the slurries coverage rate of spraying layer reach as high as 285%, allow the abundant haptoreaction of sulfur dioxide in gypsum slurries and flue gas, the sulfur dioxide concentration in discharge flue gas is reduced to 25mg/Nm
3below, the standard-required of " minimum discharge " is reached.And realize advantageously by carrying out transformation to existing desulphurization system, very there is promotional value.
Claims (10)
1. the multicycle desulfuration absorbing tower of double tower Bidirectional spray, is characterized in that, comprising:
One king-tower tower body, inside is provided with a Multi-layer sprinkling device, and described Multi-layer sprinkling device comprises: a unidirectional spraying layer and the multiple Bidirectional spray layers be positioned at below described unidirectional spraying layer;
One auxiliary tower tower body;
Be communicated with many serum recycle pipelines of Multi-layer sprinkling device, a described serum recycle pipeline part is communicated with a king-tower slurry pool of king-tower tower body; Another part is communicated with an auxiliary tower slurry pool of auxiliary tower tower body; Serum recycle pipeline described in every root is equipped with supercharging device.
2. the multicycle desulfuration absorbing tower of double tower Bidirectional spray as claimed in claim 1, it is characterized in that, the quantity of described Bidirectional spray layer is 2-5 layer.
3. the multicycle desulfuration absorbing tower of double tower Bidirectional spray as claimed in claim 1, it is characterized in that, described Bidirectional spray layer comprises spray piping and is distributed in the Bidirectional nozzle on spray piping.
4. the multicycle desulfuration absorbing tower of double tower Bidirectional spray as claimed in claim 3, it is characterized in that, the specification of described Bidirectional nozzle is DN80-120mm, average jet nozzle fluid flow 1000-1061 (-2% /+5%) L/min.
5. the multicycle desulfuration absorbing tower of double tower Bidirectional spray as claimed in claim 1, is characterized in that, described Bidirectional spray layer by layer between distance be 2-3m.
6. the multicycle desulfuration absorbing tower of double tower Bidirectional spray as claimed in claim 1, is characterized in that, the distance between described unidirectional spraying layer and most last layer Bidirectional spray layer is 2-3m.
7. the multicycle desulfuration absorbing tower of double tower Bidirectional spray as claimed in claim 1, it is characterized in that, the flue gas flow in described king-tower tower body and the liquid-gas ratio between described many serum recycle ducted slurries global cycle amount are for being not less than 30L/m
3.
8. the multicycle desulfuration absorbing tower of double tower Bidirectional spray as claimed in claim 1, is characterized in that, also comprise a smoke inlet, be provided with a grid current-sharing module between described smoke inlet and basecoat Bidirectional spray layer.
9. the multicycle desulfuration absorbing tower of double tower Bidirectional spray as claimed in claim 8, it is characterized in that, described grid current-sharing module comprises multiple screen; Described screen arranged crosswise forms multiple equal discharge orifice; Described screen thickness is 2.2-3.5mm; Described grid current-sharing module height is 0.5-1.2m; Described equal discharge orifice is of a size of 0.02-0.065m
2.
10. the multicycle desulfuration absorbing tower of double tower Bidirectional spray as claimed in claim 1, it is characterized in that, described king-tower slurry pool is communicated with described auxiliary tower slurry pool.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520732885.4U CN205127726U (en) | 2015-09-21 | 2015-09-21 | Double tower is two -way to spray multicycle desulfurization absorption tower |
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| CN201520732885.4U CN205127726U (en) | 2015-09-21 | 2015-09-21 | Double tower is two -way to spray multicycle desulfurization absorption tower |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105214472A (en) * | 2015-09-21 | 2016-01-06 | 大唐环境产业集团股份有限公司 | The multicycle desulfuration absorbing tower of a kind of double tower Bidirectional spray |
| CN106110855A (en) * | 2016-06-27 | 2016-11-16 | 蒙自矿冶有限责任公司 | Utilize the method that zinc oxide fumes absorbs lead-zinc smelting high-concentration sulfur dioxide |
-
2015
- 2015-09-21 CN CN201520732885.4U patent/CN205127726U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105214472A (en) * | 2015-09-21 | 2016-01-06 | 大唐环境产业集团股份有限公司 | The multicycle desulfuration absorbing tower of a kind of double tower Bidirectional spray |
| CN106110855A (en) * | 2016-06-27 | 2016-11-16 | 蒙自矿冶有限责任公司 | Utilize the method that zinc oxide fumes absorbs lead-zinc smelting high-concentration sulfur dioxide |
| CN106110855B (en) * | 2016-06-27 | 2019-03-26 | 蒙自矿冶有限责任公司 | The method of lead-zinc smelting high-concentration sulfur dioxide is absorbed using zinc oxide fumes |
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