CN207605593U - A kind of double pH value spray systems - Google Patents
A kind of double pH value spray systems Download PDFInfo
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- CN207605593U CN207605593U CN201721572636.9U CN201721572636U CN207605593U CN 207605593 U CN207605593 U CN 207605593U CN 201721572636 U CN201721572636 U CN 201721572636U CN 207605593 U CN207605593 U CN 207605593U
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Abstract
The utility model discloses a kind of double pH value spray systems, solve in the prior art that desulfuration efficiency is not high, system complex, problem difficult in maintenance.The utility model includes absorption tower, the first slurry circulating pump, the second slurry circulating pump, quick lime storehouse, Ca (OH)2Slurry pool, Ca (OH)2Slurries pump；Absorption tower is equipped with slurry pool of absorption tower, low spraying layer, high spraying layer and demister from the bottom to top, and absorption tower is equipped with CaCO3Slurries entrance and inlet flue duct, the top on absorption tower is equipped with exhaust pass, slurry pool of absorption tower is connect by pipeline with the arrival end of the arrival end of the first slurry circulating pump and the second slurry circulating pump respectively, the outlet end of first slurry circulating pump is connected with the first slurries delivery pipe, the outlet end of second slurry circulating pump is connected with the second slurries delivery pipe, Ca (OH)2The outlet end of slurries pump is connect with the first slurries delivery pipe, and the utility model desulfuration efficiency is high, problem simple in structure, easy to maintain.
Description
Technical field
The utility model is related to flue gas desulfurization technique fields, and in particular to a kind of double pH value spray systems.
Background technology
Energy resource structure based on coal makes coal resources in China largely consume, within the following short time, this energy
Structure will not change.Sulfur in coal is after fire coal with SO2Form enter in air, if not being controlled, acid can be caused
The environmental problems such as rain, building corrosion, while also endangering the health of the mankind.The requirement of Eleventh Five-Year Plan is answered, at present
Thermal power plant is assembled with flue gas desulfurization device substantially.But since environmental requirement is continuously improved in country, especially in 2015
Publication in December《Implement in full coal-burning power plant's minimum discharge and reducing energy consumption Engineering Task scheme》In, it is desirable that east, in, western part has
" minimum discharge ", i.e. flue dust, titanium dioxide are realized before the end of the year 2017, the end of the year 2018, the year two thousand twenty bottom in the coal-burning power plant of condition
Sulphur, discharged nitrous oxides concentration are respectively no higher than 10mg/m3、35mg/m3、50mg/m3, original conventional desulfurization technology or desulfurization system
System has been unable to meet existing discharge standard.Therefore, for new-built unit, new high-efficiency desulfurization technology is needed, for built machine
Group needs to carry out transformation for increasing productiion capacity to desulphurization plant, to meet the requirement of ultra-clean discharge.
Currently, Limestone-gypsum Wet Flue Gas Desulfurization Process technology is most widely used in flue gas desulfurization, it is traditional to its absorption tower
There are two types of the improved technologies of hollow-spraying-tower form：First, adding enhancing device in traditional spray column；Second is that using Two-way Cycle
Desulfurization technology.The enhancing device being often used in the first technology has pallet, turbulator, even distribution device etc., but installs enhancing device additional
Afterwards flue gas resistance increase, and for old Transformation of Unit when, need to will cut open and increase among original desulfurizing tower, be unfavorable for being transformed
Implementation.Second of Two-way Cycle technological system is complicated, either uses single column Two-way Cycle or the bicirculating form of double tower, is both needed to
The equipment such as collection device, deutoplasm pond and its attached oxidation unit are added, to old Transformation of Unit difficulty bigger, and power consumption
Greatly, construction cost is also high.
In conclusion the desulfurization synergistic for old unit is transformed, though existing improved technology can ensure carrying for desulfuration efficiency
Height, but the increase to gas transfer resistance, the increasing of liquid collector and deutoplasm pond can be brought in the transformation implementation process to king-tower
If but also system maintenance difficulty increases.Therefore it provides a kind of desulfuration absorbing tower, desulfuration efficiency height and simple easy care, become
Those skilled in the art urgent problems to be solved.
Utility model content
The utility model solve the technical issues of be：A kind of double pH value spray systems are provided, desulfurization in the prior art is solved
It is inefficient, system complex, problem difficult in maintenance.
To achieve the above object, the technical solution adopted in the utility model is：
A kind of double pH value spray systems, including absorption tower, the first slurry circulating pump, the second slurry circulating pump and successively
The quick lime storehouse of pipeline connection, Ca (OH)2Slurry pool, Ca (OH)2Slurries pump；
The absorption tower is disposed with slurry pool of absorption tower, low spraying layer, high spraying layer and demister, institute from the bottom to top
Absorption tower is stated to be equipped with for spraying into CaCO3CaCO3Slurries entrance and inlet flue duct for being passed through flue gas, the CaCO3
Slurries entrance and the inlet flue duct are respectively positioned between the slurry pool of absorption tower (11) and low spraying layer, and the mouth cigarette
Road is located at the CaCO3Above slurries entrance, the top on the absorption tower is equipped with the exhaust pass for neat stress to be discharged, institute
Slurry pool of absorption tower is stated respectively by the arrival end of pipeline and first slurry circulating pump and second slurry circulating pump
Arrival end connects, and the outlet end of first slurry circulating pump is connected with the first slurries delivery pipe, second slurry circulating pump
Outlet end be connected with the second slurries delivery pipe, the slurries in slurry pool of absorption tower are passed through first by first slurry circulating pump
Slurries delivery pipe is sent into high spraying layer, and second slurry circulating pump is defeated by the second slurries by the slurries in slurry pool of absorption tower
Pipe is sent to be sent into low spraying layer, the Ca (OH)2The outlet end of slurries pump is connect with the first slurries conveying pipeline, the quick lime
Quick lime in storehouse enters Ca (OH)2Slurry pool is configured to Ca (OH)2After slurries, by the Ca (OH)2Slurries pump passes through first
Slurries delivery pipe is sent into high spraying layer.
Further, the number of plies of high spraying layer is at least two layers, each layer correspond to respectively first slurry circulating pump and
One the first slurries delivery pipe, the arrival end of each the first slurry circulating pump are connect with slurry pool of absorption tower pipeline respectively, Ca
(OH)2The outlet end of slurries pump is connect with each first slurries conveying pipeline respectively.
Further, the number of plies of low spraying layer is at least two layers, each layer correspond to respectively second slurry circulating pump and
One the second slurries delivery pipe, the arrival end of each the second slurry circulating pump are connect with slurry pool of absorption tower pipeline respectively.
Further, the number of plies of high spraying layer is identical as low spraying layer, or one layer more than low spraying layer.
Further, slurry pool of absorption tower is connected with oxidation unit by pipeline.
Further, Ca (OH)2It is provided in slurry pool for slurry being stirred for uniform stirring rod.
Compared with prior art, the utility model has the advantages that：
The utility model is simple in structure, and design is scientific and reasonable, by controlling the spray for being formed and being had there are two types of different pH condition
Drenching layer realizes simple Two-way Cycle technical characteristic, effectively improves limestone utilization and SO2Removal efficiency；And it can be effective
The cost of ground reduction desulphurization system, simple system, Operation and Maintenance are convenient.
The utility model to high spraying layer by spraying into Ca (OH)2Slurries are allowed to be formed two kinds with different pH condition
Spraying layer, the high ph-values of high spraying layer slurries can promote SO2Absorption.Ca (OH) simultaneously2Solution is to SO3Removal efficiency is very high,
Though being diluted in sprayed slurry, remain to improve desulfurization Tower System to SO3Removal efficiency, to meet the following more harsh ring
Guaranteed request, and the corrosion of upstream device can be reduced.
The utility model improves under the premise of not increasing original absorption tower height degree, not changing the equipment such as construction in tower
The pH value of high-rise sprayed slurry realizes simple Two-way Cycle technical characteristic, improves desulfuration efficiency, saves improvement expenses and duration.This
It is not necessary that deutoplasm pond and attached slurry circulating pump, oxidation unit of double-cycle process etc. is arranged, opposite other efficiently take off utility model
The power consumption of sulphur system is low, system is simple.
The utility model desulphurization system is without being arranged the devices such as pallet, liquid collecting bucket, the resistance of other opposite high-efficiency desulfurization systems
Power is small, mass transfer is good.
Description of the drawings
Attached drawing 1 is the structural schematic diagram of the utility model.
Wherein, reference numeral is corresponding entitled：The absorption towers 1-, the first slurry circulating pumps of 2-, the second slurry circulating pumps of 3-,
4-Ca(OH)2Slurries pump, 5- quick limes storehouse, 6-Ca (OH)2Slurry pool, 7- oxidation units, 11- slurry pool of absorption tower, the low sprays of 12-
Drenching layer, 13- high spraying layers, 14- demisters, 15-CaCO3Slurries entrance, 16- inlet flue ducts, the first slurries of 17- delivery pipe,
18- the second slurries delivery pipes, 19- exhaust pass.
Specific implementation mode
The utility model is described in further detail with embodiment for explanation below in conjunction with the accompanying drawings, and the mode of the utility model includes
But it is not limited only to following embodiment.
Embodiment
As shown in Figure 1, the utility model provides a kind of double pH value spray systems, which has two by controlling to be formed
The spraying layer of kind different pH condition, realizes simple Two-way Cycle technical characteristic, effectively improves limestone utilization and SO2It is de-
Except rate；And it can be effectively reduced the cost of desulphurization system, simple system, Operation and Maintenance is convenient.The utility model includes absorbing
Tower 1, the first slurry circulating pump 2, the second slurry circulating pump 3 and successively pipeline connection quick lime storehouse 5, Ca (OH)2Slurry pool
6、Ca(OH)2Slurries pump 4.
The absorption tower 1 is disposed with slurry pool of absorption tower 11, low spraying layer 12, high spraying layer 13 and removes from the bottom to top
Day with fog 14, the absorption tower 1 are equipped with for spraying into CaCO3CaCO3Slurries entrance 15 and import cigarette for being passed through flue gas
Road 16, the CaCO3Slurries entrance 15 and the inlet flue duct 16 are respectively positioned on the slurry pool of absorption tower 11 and low spraying layer
Between 12, and the mouth flue 16 is located at the CaCO315 top of slurries entrance, the top on the absorption tower 1, which is equipped with, to be used
In the exhaust pass 19 of discharge neat stress, the slurry pool of absorption tower 11 passes through pipeline and first slurry circulating pump 2 respectively
Arrival end connected with the arrival end of second slurry circulating pump 3, the slurry pool of absorption tower 11 is connected aerobic by pipeline
Makeup sets 7.
The outlet end of first slurry circulating pump 2 is connected with the first slurries delivery pipe 17, second slurry circulating pump 3
Outlet end be connected with the second slurries delivery pipe 18, first slurry circulating pump 2 leads to the slurries in slurry pool of absorption tower 11
It crosses the first slurries delivery pipe 17 and is sent into high spraying layer 13, second slurry circulating pump 3 is by the slurries in slurry pool of absorption tower 11
It is sent into low spraying layer 12, the Ca (OH) by the second slurries delivery pipe 182The outlet end of slurries pump 4 and the first slurries delivery pipe
17 pipelines connect, the Ca (OH)2It is provided in slurry pool 6 for slurry being stirred for uniform stirring rod.The quick lime storehouse 5
In quick lime enter Ca (OH)2Slurry pool 6 is configured to Ca (OH)2After slurries, by the Ca (OH)2Slurries pump 4 passes through first
Slurries delivery pipe 17 is sent into high spraying layer 13.
In order to further increase limestone utilization and SO2Removal efficiency, the number of plies of the high spraying layer 13 is at least two
Layer, each layer correspond to first slurry circulating pump 2 and the first slurries delivery pipe 17 respectively, described in each
The arrival end of first slurry circulating pump 2 is connect with 11 pipeline of the slurry pool of absorption tower respectively, the Ca (OH)2Slurries pump 4
Outlet end is connect with 17 pipeline of the first slurries delivery pipe described in each respectively.The number of plies of the low spraying layer 12 is at least two
Layer, each layer correspond to second slurry circulating pump 3 and the second slurries delivery pipe 18 respectively, described in each
The arrival end of second slurry circulating pump 3 is connect with 11 pipeline of the slurry pool of absorption tower respectively.The number of plies of the high spraying layer 13
It is identical as low spraying layer 12, or than more than 12 one layers of low spraying layer.
When the utility model is used, the lime slurry in slurry pool of absorption tower 11 passes through first by the first slurry circulating pump 2
Slurries delivery pipe 17 is sent into high spraying layer 13, and is sent into low spray by the second slurries delivery pipe 18 by the second slurry circulating pump 3
After drenching layer 12, former flue gas is run from bottom to top after entering absorption tower by inlet flue duct 16, and counter current contacting is formed with sprayed slurry, according to
It is secondary through too low spraying layer 12, high spraying layer 13.In 12 region of low spraying layer, the SO in flue gas can be tentatively removed2, while can assist
With part HF, HCl in removal flue gas；The slurry pH value in 12 region of low spraying layer is relatively low simultaneously, is conducive to CaSO3Complete oxidation
And CaSO4Generation.Quick lime in quick lime storehouse 5 enters Ca (OH)2Slurry pool 6 is configured to Ca (OH)2After slurries, by described
Ca(OH)2Slurries pump 4 is sent into high spraying layer 13 by the first slurries delivery pipe 17.Therefore the slurries in high 13 region of spraying layer, in addition to
Outside lime slurry in the slurry pool of absorption tower 11 squeezed by the first slurry circulating pump 2, Ca (OH) also in addition jetted2Slurries,
To increase the slurry pH value in 13 region of high spraying layer, the sprayed slurry of high pH environment can make the SO in flue gas2Almost all is inhaled
Removal is received, and is improved to SO3Removal effect；Flue gas is discharged after 14 demisting of demister by exhaust pass 19 after purification.
Above-described embodiment is only one of preferred embodiments of the present invention, should not be taken to limit the utility model
Protection domain, as long as the utility model body design thought and that mentally makes have no the change of essential meaning or profit
Color, it is solved the technical issues of it is still consistent with the utility model, the scope of protection of the utility model should all be included in
Within.
Claims (6)
1. a kind of double pH value spray systems, which is characterized in that including absorption tower (1), the first slurry circulating pump (2), the second slurries
Circulating pump (3) and successively the quick lime storehouse (5) of pipeline connection, Ca (OH)2Slurry pool (6), Ca (OH)2Slurries pump (4)；
The absorption tower (1) is disposed with slurry pool of absorption tower (11), low spraying layer (12), high spraying layer (13) from the bottom to top
With demister (14), the absorption tower (1) is equipped with for spraying into CaCO3CaCO3Slurries entrance (15) and for being passed through cigarette
The inlet flue duct (16) of gas, the CaCO3Slurries entrance (15) and the inlet flue duct (16) are respectively positioned on the absorption tower slurry
Between liquid pool (11) and low spraying layer (12), and the inlet flue duct (16) is located at the CaCO3On slurries entrance (15)
Side, the top of the absorption tower (1) are equipped with the exhaust pass (19) for neat stress to be discharged, the slurry pool of absorption tower (11) point
It is not connect with the arrival end of the arrival end of first slurry circulating pump (2) and second slurry circulating pump (3) by pipeline,
The outlet end of first slurry circulating pump (2) is connected with the first slurries delivery pipe (17), second slurry circulating pump (3)
Outlet end is connected with the second slurries delivery pipe (18), and first slurry circulating pump (2) is by the slurry in slurry pool of absorption tower (11)
Liquid is sent into high spraying layer (13) by the first slurries delivery pipe (17), and second slurry circulating pump (3) is by slurry pool of absorption tower
(11) slurries in are sent into low spraying layer (12), the Ca (OH) by the second slurries delivery pipe (18)2Slurries pump the outlet of (4)
End is connect with first slurries delivery pipe (17) pipeline, and the quick lime in the quick lime storehouse (5) enters Ca (OH)2Slurry pool
(6), it is configured to Ca (OH)2After slurries, by the Ca (OH)2Slurries pump (4) and are sent into high spray by the first slurries delivery pipe (17)
Layer (13).
2. a kind of double pH value spray systems according to claim 1, which is characterized in that the number of plies of the high spraying layer (13)
At least two layers, each layer corresponds to first slurry circulating pump (2) and the first slurries delivery pipe respectively
(17), the arrival end of each first slurry circulating pump (2) is connect with the slurry pool of absorption tower (11) pipeline respectively, institute
State Ca (OH)2The outlet end of slurries pump (4) is connect with first slurries delivery pipe (17) pipeline described in each respectively.
3. a kind of double pH value spray systems according to claim 2, which is characterized in that the number of plies of the low spraying layer (12)
At least two layers, each layer corresponds to second slurry circulating pump (3) and the second slurries delivery pipe respectively
(18), the arrival end of each second slurry circulating pump (3) is connect with the slurry pool of absorption tower (11) pipeline respectively.
4. a kind of double pH value spray systems according to claim 3, which is characterized in that the number of plies of the high spraying layer (13)
It is identical as low spraying layer (12), or than mostly one layer of low spraying layer (12).
5. a kind of double pH value spray systems according to claim 4, which is characterized in that the slurry pool of absorption tower (11) is logical
Piping is connected with oxidation unit (7).
6. a kind of double pH value spray systems according to claim 5, which is characterized in that the Ca (OH)2In slurry pool (6)
It is provided with for slurry being stirred for uniform stirring rod.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721572636.9U CN207605593U (en) | 2017-11-22 | 2017-11-22 | A kind of double pH value spray systems |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721572636.9U CN207605593U (en) | 2017-11-22 | 2017-11-22 | A kind of double pH value spray systems |
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| CN207605593U true CN207605593U (en) | 2018-07-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110694440A (en) * | 2019-11-04 | 2020-01-17 | 杜梦凡 | Double-drive calcium-based wet desulphurization deep emission reduction device and method |
-
2017
- 2017-11-22 CN CN201721572636.9U patent/CN207605593U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110694440A (en) * | 2019-11-04 | 2020-01-17 | 杜梦凡 | Double-drive calcium-based wet desulphurization deep emission reduction device and method |
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