CN206428096U - A kind of high-efficiency low energy consumption sea water desulfuration oxidative system - Google Patents
A kind of high-efficiency low energy consumption sea water desulfuration oxidative system Download PDFInfo
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- CN206428096U CN206428096U CN201621406548.7U CN201621406548U CN206428096U CN 206428096 U CN206428096 U CN 206428096U CN 201621406548 U CN201621406548 U CN 201621406548U CN 206428096 U CN206428096 U CN 206428096U
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Abstract
The utility model discloses a kind of high-efficiency low energy consumption sea water desulfuration oxidative system, including desulfurization seawater oxidation pond and fresh seawater bypass duct；The rear and front end of the desulfurization seawater oxidation pond is respectively equipped with seawater inlet and seawer outlet, and the desulfurization seawater oxidation pond is provided with the different Liang Ge areas of the front and rear depth, and the pond in front end stripping area is deeply shallower, and the pH value of desulfurization seawater is relatively low in pond, with very high CO2Stripping efficiency；The pond of rear end zoneofoxidation is deeper, and the pH value of desulfurization seawater is higher in pond, with very high SO3 2‑Oxidation efficiency；One end of the fresh seawater bypass duct is connected with the seawater inlet of desulfurization seawater oxidation pond, and its other end is connected with the catchment of desulfurization seawater oxidation pond.The utility model can effectively meet CO2Stripping and SO3 2‑The difference in functionality demand of oxidation, greatly improves the efficiency of stripping and oxidation.
Description
Technical field
The utility model belongs to air and administers field of Environment Protection, is related to a kind of coal-burning power plant's sea water desulfuration technology, and in particular to
A kind of high-efficiency low energy consumption sea water desulfuration oxidative system.
Background technology
Seawater desulfurizing process is, using seawater as reducing agent, to be taken off using one kind of the basicity absorbing sulfur dioxide in flue of seawater
Sulphur method.The technique be not present fouling and clogging problem, no waste disposal issues, desulfuration efficiency is up to more than 90%.With respect to stone
Lime stone-gypsum desulfurization, its simple system, cost of investment are low, operating cost is low, therefore, and field of easily bordering on the sea is supplied in seawater
Institute, is widely applied in the case that coal-fired sulfur content is relatively low.
Seawater desulfurizing process mainly includes flue gas system, absorption system and oxidative system.Flue gas system is defeated by sulfur-containing smoke gas
Absorption tower is sent into, heel row is absorbed to chimney by absorption tower.Absorption tower is that seawater fully contacts with sulfur-containing smoke gas and absorbs flue gas
Middle SO2Place.As the fresh seawater of reducing agent, PH absorbs SO between 7.5-8.52Desulfurization pH value of seawater afterwards is reduced to
2-3, the SO absorbed under this pH value2Play pendulum, be very easy to secondary effusion.The effect of oxidative system is exactly will not
Stable SO2It is converted into stable SO4 2-, while adjusting PH, COD, DO of desulfurization seawater, make desulfurization seawater qualified discharge.Can
See, oxidative system is SO2The principal security of stable absorption and desulfurization seawater qualified discharge.
Chinese patent ZL01101694.9 and ZL200580000770.5 disclose a kind of sea water desulfuration method for oxidation, should
Method is not provided with fresh seawater bypass, and stripping and the function of aoxidizing are realized in same pond.Fresh seawater fully enters oxidation pond
With desulfurization sea water mixing, the interior mixing seawater amount of oxidation pond is big, SO3 2-Concentration is low, oxidation difficulty is big, considerably increase oxidation empty
Gas consumption；Being mixed into for a large amount of fresh seawaters causes the pH value of zoneofoxidation seawater more than 6 simultaneously, CO2Stripping is difficult, is significantly greatly increased
Measured the need for stripping air.
Chinese patent CN102387850B, CN104203839B and Chinese utility model patent application CN201610062325
A kind of sea water desulfuration method for oxidation is disclosed, this method is provided with fresh seawater bypath system, reduces oxidation air needs
Measure, but stripping and oxidative function are synchronously carried out in zoneofoxidation, it is ensured that higher CO2Stripping efficiency, should be used than relatively low
PH value, but low pH value is unfavorable for SO3 2-Oxidation；It is on the contrary, it is ensured that SO3 2-Oxidation, higher pH value should be used, it is but higher
PH value be unfavorable for CO2Stripping.On the other hand, relatively low pond is conducive to CO deeply2Stripping, and higher pond is conducive to SO deeply3 2-'s
Oxidation.It can be seen that there is following defect in the above method：CO2Stripping and SO3 2-Oxidation synchronously carried out in zoneofoxidation, aoxidize
During stripping, pH value is identical, sea water advanced consistent, it is impossible to while ensureing CO2Stripping, SO3 2-The high efficiency of oxidation.
Utility model content
The purpose of this utility model is to provide a kind of high-efficiency low energy consumption sea water desulfuration oxidative system, and it can effectively meet
CO2Stripping and SO3 2-The difference in functionality demand of oxidation, greatly improves the efficiency of stripping and oxidation, so as to reduce oxidation air
Consumption, reduce the energy consumption of sea water desulfuration oxidative system, realize the qualified discharge of desulfurization seawater under oxidized input air minimal condition.
The utility model solves the technical scheme that its technical problem used：
A kind of high-efficiency low energy consumption sea water desulfuration oxidative system, the system includes desulfurization seawater oxidation pond and fresh seawater is bypassed
Pipeline；
The rear and front end of the desulfurization seawater oxidation pond is respectively equipped with seawater inlet and seawer outlet, the seawater inlet
Inlet gate valve is provided with, the desulfurization seawater oxidation pond is divided into mixed zone, stripping area, zoneofoxidation and draining from front to back
Area, the top of the mixed zone, which is provided with cover plate, the mixed zone, is provided with desulfurization seawater pipeline, the desulfurization seawater pipeline
Outlet is positioned at the bottom of mixed zone, and the mixed zone is used for the fresh seawater that will be flowed into through seawater inlet and through desulfurization seawater pipeline
The desulfurization seawater of inflow is mixed, and controls the pH value of seawater after mixing for 4.5-5.9, between the mixed zone and stripping area
Partition wall is provided with, the middle and upper part of the partition wall is provided with mixing seawer outlet, and the pond depth in the stripping area is 2-4m, the stripping area
Stripping processing is carried out for the mixing seawater to relatively low pH value, with the CO in stripping mixing seawater2Gas, the pond of the zoneofoxidation
Depth is 4-8m, and the pH value that the zoneofoxidation controls to mix seawater is 5.7-6.5, in the mixing seawater to higher pH value
SO2Oxidation processes are carried out, the catchment is used for by the mixing seawater after oxidation and through the new of fresh seawater bypass duct inflow
Sea is discharged into after fresh sea water mixing；
One end of the fresh seawater bypass duct is connected with the seawater inlet of desulfurization seawater oxidation pond, and its other end is with taking off
The catchment connection of sulphur seawater oxidation pond.
By above-mentioned technical proposal, directly connected between the stripping area and zoneofoxidation.
By above-mentioned technical proposal, dividing plate is provided between the stripping area and zoneofoxidation.
By above-mentioned technical proposal, the agitating device for strengthening seawater disturbance is provided with the stripping area.
By above-mentioned technical proposal, the agitating device is mechanical agitation device, seawater is filled from agitating device or air agitation
Put.
By above-mentioned technical proposal, the agitating device is agitator, sea water pump agitator or airflow agitator.
By above-mentioned technical proposal, the oxidation for providing a diameter of 30-80 microns of microbubble is provided with the zoneofoxidation
Air microbubble blasts device.
By above-mentioned technical proposal, it is the tubular type aeration using covering microporous barrier that the oxidation air microbubble, which blasts device,
Device.
By above-mentioned technical proposal, the other end of the fresh seawater bypass duct is provided with bypass gate valve.
The utility model, has the advantages that：Seawater inlet of the utility model in desulfurization seawater oxidation pond front end
Locate inlet porting gate valve, can flexibly control to flow into the flow of fresh seawater in mixed zone, to control the pH value of seawater after mixing
For 4.5-5.9, and in mixed zone cover plate is set, the outlet of desulfurization seawater pipeline is arranged on to mixed zone bottom, mixing seawater goes out
Mouth is arranged on partition wall middle and upper part, can prevent the pH value of local seawater is too low to cause SO2Secondary escape；Then by stripping and oxygen
Change two kinds of difference in functionalitys and realize that the pond in front end stripping area is deeply shallower, and depth is 2- in the different Liang Ge areas of the front and rear depth respectively
The pH value of desulfurization seawater is relatively low in 4m, pond, and the scope of pH value is 4.5-5.9, with very high CO2Stripping efficiency, rear end oxidation
The pond in area is deeper, and depth is that the pH value of desulfurization seawater in 4-8m, pond is higher, and the scope of pH value is 5.7-6.5, with very high
SO2Oxidation efficiency.The utility model also sets up fresh seawater bypass duct, and fresh seawater in oxidation pond can be filled into flexible modulation
Flow so as to greatest extent reduction oxidation air the need for measure.The utility model can effectively meet CO2Stripping and SO3 2-Oxygen
The difference in functionality demand of change, greatly improves the efficiency of stripping and oxidation, so as to reduce the consumption of oxidation air, reduces sea
The energy consumption of water desulfurization oxidative system, realizes the qualified discharge of desulfurization seawater under oxidized input air minimal condition.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：
Fig. 1 is the floor plan of the utility model embodiment；
Fig. 2 is the sectional view of the line A-A along along Fig. 1.
In figure：1- mixed zones, 2- strippings area, 3- zoneofoxidations, 4- catchments, 5- fresh seawater bypass ducts, 6- partition walls,
11- seawater inlets, 12- desulfurization seawater pipelines, 13- inlet gate valves, 14- seawer outlets, 15- cover plates, 21- agitating devices, 31- oxygen
Wind transmission machine, 32- oxidation air main pipes, 33- injection main pipes, 34- injection pipes, 51- bypass gate valves, 61- mixing seawer outlets.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain this
Utility model, is not used to limit the utility model.
In preferred embodiment of the present utility model, as shown in Figure 1 and Figure 2, a kind of high-efficiency low energy consumption sea water desulfuration oxidation system
System, the system includes desulfurization seawater oxidation pond and fresh seawater bypass duct 5；
The rear and front end of desulfurization seawater oxidation pond is respectively equipped with seawater inlet 11 and seawer outlet 14, seawater inlet 11 and set
Inlet gate valve 13 is equipped with, desulfurization seawater oxidation pond is divided into mixed zone 1, stripping area 2, oxidation along seawater flow direction from front to back
Area 3 and catchment 4, the top of mixed zone 4, which is provided with cover plate 15, mixed zone, is provided with desulfurization seawater pipeline 12, desulfurization seawater pipe
Mixed positioned at the bottom (desulfurization seawater pipeline lies in a horizontal plane in the bottom of pond of mixed zone in the present embodiment) of mixed zone 1 outlet in road 12
The desulfurization seawater that closing area 1 is used to flow into by the fresh seawater flowed into through seawater inlet 11 and through desulfurization seawater pipeline 12 is mixed
Close, and control the pH value of seawater after mixing for 4.5-5.9, be provided between mixed zone 1 and stripping area 2 in partition wall 6, partition wall 6
Top is provided with mixing seawer outlet 61, and the pond depth in stripping area 2 is 2-4m, and stripping area 2 is used to enter the mixing seawater of relatively low pH value
Row stripping processing, with the CO in stripping mixing seawater2Gas, the pond depth of zoneofoxidation 3 is 4-8m, the control mixing seawater of zoneofoxidation 3
PH value be 5.7-6.5, for higher pH value mixing seawater in SO2Oxidation processes are carried out, catchment 4 is used for will oxidation
Sea is discharged into after rear mixing seawater and the fresh seawater mixing flowed into through fresh seawater bypass duct 5；
One end of fresh seawater bypass duct 5 is connected with the seawater inlet 11 of desulfurization seawater oxidation pond, and its other end is with taking off
The catchment 4 of sulphur seawater oxidation pond is connected.
In preferred embodiment of the present utility model, as shown in Fig. 2 directly being connected between stripping area 2 and zoneofoxidation 3.This
Outside, dividing plate can also be set between stripping area 2 and zoneofoxidation 3.
In preferred embodiment of the present utility model, as shown in Figure 1 and Figure 2, it is provided with stripping area 2 for strengthening seawater
The agitating device 21 of disturbance, to improve CO2Stripping efficiency.Agitating device is mechanical agitation device, seawater from agitating device or sky
Gas agitating device, such as agitator, sea water pump agitator or airflow agitator.
In preferred embodiment of the present utility model, as shown in Figure 1 and Figure 2, the micro- gas of oxidation air is provided with zoneofoxidation 3
Bubble blasts device, and the diameter of the microbubble of generation further improves oxidation efficiency up to 30-80 microns.Specifically, oxidation air
It is the tube aerator using covering microporous barrier that microbubble, which blasts device, and this is typical microbubble implementation, such as Fig. 1 institutes
Show, the tube aerator includes the oxidation air main pipe 32, injection main pipe 33 and injection pipe 34 being sequentially connected, oxidation air is female
Pipe 32 is connected with least one oxidation fan 31.
In preferred embodiment of the present utility model, as shown in figure 1, the other end of fresh seawater bypass duct 5 is provided with
Bypass gate valve 51.
The utility model in specific application, as shown in Figure 1 and Figure 2, is directly connected, not between stripping area 2 and zoneofoxidation 3
Dividing plate is set.The projected depth in stripping area 2 be 2.5m, design pH value be 5.2 ± 0.2, stripping area 2 provided with mechanical agitation device with
Strengthen the disturbance of seawater；The projected depth of zoneofoxidation 3 is 4.2m, and design pH value is 5.9 ± 0.2, and oxidation air is micro- using covering
The tube aerator 34 of pore membrane is sprayed into pond, and Air Bubble Size is at 30-80 μm.The oxidation air design load of oxidation pond is 60000m3/
H, the occupation of land about 1600m of oxidation pond2。
During work, gravity flow enters stripping area 2 after fresh seawater and desulfurization seawater are mixed in mixed zone, fresh seawater part from
Mixed zone enters oxidation pond, is partly mixed again with the seawater after oxidation by fresh seawater bypass duct 5, seawater PH after mixing
More than 6.8 are reached, sea can be directly discharged into.
Fresh seawater condition：2 month about 14 DEG C of temperature, July, temperature was about 30 DEG C；PH value is 8-8.2；Total alkalinity 2-
2.3mmol/l；The fresh seawater amount that mixed zone enters is about 25000m3/h.Desulfurization sea conditions：About 40 DEG C of temperature, SO2It is de-
Except amount 31.2kmol/h, desulfurization seawater flow about 9000m3/h。
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of the utility model appended claims.
Claims (9)
1. a kind of high-efficiency low energy consumption sea water desulfuration oxidative system, it is characterised in that the system includes desulfurization seawater oxidation pond and new
Fresh seawater bypass duct；Wherein,
The rear and front end of the desulfurization seawater oxidation pond is respectively equipped with seawater inlet and seawer outlet, the seawater inlet and set
There is inlet gate valve, the desulfurization seawater oxidation pond is divided into mixed zone, stripping area, zoneofoxidation and catchment, institute from front to back
The top for stating mixed zone is provided with cover plate, is provided with desulfurization seawater pipeline, the outlet of the desulfurization seawater pipeline in the mixed zone
Bottom positioned at mixed zone, the mixed zone is used for the fresh seawater that will be flowed into through seawater inlet and flowed into through desulfurization seawater pipeline
Desulfurization seawater mixed, and control mixing after seawater pH value be 4.5-5.9, between the mixed zone and stripping area set
There is partition wall, the middle and upper part of the partition wall is provided with mixing seawer outlet, and the pond depth in the stripping area is 2-4m, and the stripping area is used for
Stripping processing is carried out to the mixing seawater of relatively low pH value, with the CO in stripping mixing seawater2Gas, the Chi Shenwei of the zoneofoxidation
4-8m, the pH value that the zoneofoxidation controls to mix seawater is 5.7-6.5, for the SO in the mixing seawater to higher pH value2Enter
Row oxidation processes, the catchment is used for the fresh seawater flowed into by the mixing seawater after oxidation and through fresh seawater bypass duct
Sea is discharged into after mixing；
One end of the fresh seawater bypass duct is connected with the seawater inlet of desulfurization seawater oxidation pond, its other end and desulfurization sea
The catchment connection of water oxidation pond.
2. system according to claim 1, it is characterised in that directly connected between the stripping area and zoneofoxidation.
3. system according to claim 1, it is characterised in that be provided with dividing plate between the stripping area and zoneofoxidation.
4. system according to claim 1, it is characterised in that be provided with the stripping area for strengthening seawater disturbance
Agitating device.
5. system according to claim 4, it is characterised in that the agitating device is mechanical agitation device, seawater is stirred certainly
Dynamic device or air-agitating device.
6. the system according to claim 4 or 5, it is characterised in that the agitating device is agitator, sea water pump agitator
Or airflow agitator.
7. system according to claim 1, it is characterised in that be provided with the zoneofoxidation for providing a diameter of 30-
The oxidation air microbubble of 80 microns of microbubbles blasts device.
8. system according to claim 7, it is characterised in that it is using covering that the oxidation air microbubble, which blasts device,
The tube aerator of microporous barrier.
9. system according to claim 1, it is characterised in that the other end of the fresh seawater bypass duct is provided with side
Switch valve.
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| CN201621406548.7U CN206428096U (en) | 2016-12-21 | 2016-12-21 | A kind of high-efficiency low energy consumption sea water desulfuration oxidative system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108218050A (en) * | 2018-03-23 | 2018-06-29 | 东方电气集团东方锅炉股份有限公司 | The quality recovery device and restoration methods of acid seawater after a kind of flue gas desulfurization with seawater |
-
2016
- 2016-12-21 CN CN201621406548.7U patent/CN206428096U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108218050A (en) * | 2018-03-23 | 2018-06-29 | 东方电气集团东方锅炉股份有限公司 | The quality recovery device and restoration methods of acid seawater after a kind of flue gas desulfurization with seawater |
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