CN205127727U - Efficient desulfurizing absorption tower - Google Patents
Efficient desulfurizing absorption tower Download PDFInfo
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- CN205127727U CN205127727U CN201520733200.8U CN201520733200U CN205127727U CN 205127727 U CN205127727 U CN 205127727U CN 201520733200 U CN201520733200 U CN 201520733200U CN 205127727 U CN205127727 U CN 205127727U
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- absorption tower
- desulfurization absorption
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- flue gas
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Abstract
The utility model provides an efficient desulfurizing absorption tower through improving the gypsum slurry coverage rate, eliminates flue gas desulfurization reaction dead angle, bypass, makes the abundant contact reaction of sulfur dioxide in gypsum slurry and the flue gas, improves the desorption rate. 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, flue gas entry, flue gas entry and descend two -way the spraying of one deck to be equipped with the grid module of flow equalizing between the layer most. Can reduce the sulfur dioxide concentration of discharging in the flue gas to below the 25mgNm3, reach 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 a kind of high-efficiency desulfurization absorption tower.
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 trioxide, 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 high-efficiency desulfurization absorption tower, by improving gypsum slurries coverage rate, eliminating desulphurization reaction dead angle, bypass, making the abundant haptoreaction of the sulfur dioxide in gypsum slurries and flue gas, improve removal efficiency.
For reaching above-mentioned purpose, the concrete technical scheme that the utility model is taked is:
A kind of high-efficiency desulfurization absorption tower, 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 smoke inlet, is provided with a grid current-sharing module between described smoke inlet and basecoat Bidirectional spray layer.
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 DN80-120 ㎜, average jet nozzle fluid flow 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, also comprise the many serum recycle pipelines be connected with described Multi-layer sprinkling device, 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, described grid current-sharing module comprises multiple screen; Described screen arranged crosswise forms multiple equal discharge orifice.
Further, 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 0.02-0.065 ㎡.
By taking technique scheme, the utility model realizes Bidirectional spray, grid current-sharing module simultaneously, remove the bypass of desulphurization reaction dead angle, and 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; 2-smoke inlet; 3-Bidirectional spray layer; The unidirectional spraying layer of 4-; 5-grid current-sharing module.
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, high-efficiency desulfurization absorption tower of the present utility model, comprising: king-tower 1, and 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.
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 DN80-120 ㎜, 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.
The many serum recycle pipeline (not shown) be connected with described Multi-layer sprinkling device, the 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 2, between smoke inlet 2 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 current-sharing grid device height is 0.5-1.2m; Described equal discharge orifice is of a size of 0.02-0.065 ㎡.
It is more even that grid current-sharing module 5 coordinates Bidirectional spray that flue gas flow field can be made to distribute, 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.
To sum up, the utility model passes through Bidirectional spray, the coverage rate of the slurries in desulfuration absorbing tower can be made to reach more than 285%, then coordinate grid current-sharing module to eliminate desulphurization reaction dead angle in tower, bypass, 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, application high-efficiency desulfurization absorption tower 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.
Coordinate Bidirectional spray again, Bidirectional nozzle specification selects bidirectional hollow tapered, and material is SiC, and flow is 1061 (-2% /+5%) L/min, 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, application high-efficiency desulfurization absorption tower 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.
Coordinate Bidirectional spray again, Bidirectional nozzle specification selects bidirectional hollow tapered, and material is SiC, and flow is 1061 (-2% /+5%) L/min, 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 grid current-sharing module simultaneously, eliminate desulphurization reaction dead angle, bypass, the slurries coverage rate of spraying layer is made to 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 (9)
1. a high-efficiency desulfurization absorption tower, 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 is positioned at the multiple Bidirectional spray layers below described unidirectional spraying layer;
One smoke inlet, is provided with a grid current-sharing module between described smoke inlet and basecoat Bidirectional spray layer.
2. high-efficiency desulfurization absorption tower as claimed in claim 1, it is characterized in that, the quantity of described Bidirectional spray layer is 2-5 layer.
3. high-efficiency desulfurization absorption tower 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. high-efficiency desulfurization absorption tower as claimed in claim 3, it is characterized in that, the specification of described Bidirectional nozzle is DN80-120 ㎜, average jet nozzle fluid flow 1061 (-2% /+5%) L/min.
5. high-efficiency desulfurization absorption tower as claimed in claim 1, is characterized in that, described Bidirectional spray layer by layer between distance be 2-3m.
6. high-efficiency desulfurization absorption tower as claimed in claim 1, is characterized in that, the distance between described unidirectional spraying layer and most last layer Bidirectional spray layer is for being 2-3m.
7. high-efficiency desulfurization absorption tower as claimed in claim 1, it is characterized in that, also comprising the many serum recycle pipelines be connected with described Multi-layer sprinkling device, spraying liquid-gas ratio between flue gas flow in described tower body and described many serum recycle ducted slurries global cycle amount for being not less than 30L/m
3.
8. high-efficiency desulfurization absorption tower as claimed in claim 1, it is characterized in that, described grid current-sharing module comprises multiple screen; Described screen arranged crosswise forms multiple equal discharge orifice.
9. high-efficiency desulfurization absorption tower as claimed in claim 8, it is characterized in that, 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 0.02-0.065 ㎡.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520733200.8U CN205127727U (en) | 2015-09-21 | 2015-09-21 | Efficient desulfurizing absorption tower |
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|---|---|---|---|
| CN201520733200.8U CN205127727U (en) | 2015-09-21 | 2015-09-21 | Efficient desulfurizing absorption tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105214473A (en) * | 2015-09-21 | 2016-01-06 | 大唐环境产业集团股份有限公司 | A kind of high-efficiency desulfurization absorption tower |
-
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- 2015-09-21 CN CN201520733200.8U patent/CN205127727U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105214473A (en) * | 2015-09-21 | 2016-01-06 | 大唐环境产业集团股份有限公司 | A kind of high-efficiency desulfurization absorption tower |
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