CN207031141U - A kind of power plant desulfurization wastewater pretreatment unit - Google Patents
A kind of power plant desulfurization wastewater pretreatment unit Download PDFInfo
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- CN207031141U CN207031141U CN201720863945.5U CN201720863945U CN207031141U CN 207031141 U CN207031141 U CN 207031141U CN 201720863945 U CN201720863945 U CN 201720863945U CN 207031141 U CN207031141 U CN 207031141U
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- settling zone
- power plant
- desulfurization wastewater
- pretreatment unit
- wastewater pretreatment
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- 239000002351 wastewater Substances 0.000 title claims abstract description 33
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 22
- 230000023556 desulfurization Effects 0.000 title claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 40
- 239000010802 sludge Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000004062 sedimentation Methods 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 239000003814 drug Substances 0.000 claims description 45
- 238000003756 stirring Methods 0.000 claims description 18
- 238000001556 precipitation Methods 0.000 claims description 15
- 238000010992 reflux Methods 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 6
- 230000029219 regulation of pH Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 abstract 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 239000010440 gypsum Substances 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000370738 Chlorion Species 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 210000002966 serum Anatomy 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The utility model discloses a kind of power plant desulfurization wastewater pretreatment unit, including reaction tank, sedimentation basin and filtered water tank, guide shell is provided with described reaction tank, agitator is provided with guide shell；The bottom of sedimentation basin is settling zone, settling zone passes through sludge pump and sludge press filtration system connectivity, the top of settling zone is provided with inclined-tube reaction area, inclined-tube reaction area is provided with spaced inclined tube, the top of settling zone is provided with outlet canal, outlet canal is arranged on the top in inclined-tube reaction area, and outlet canal connects with filtered water tank.The device is high using highly dense pool surface load, and floor space is small；Anti- load variations ability is strong, adapts to raw water quality wide fluctuations situation；The characteristics of deposition efficiency is high, and discharge sludge solid content is high, reduce pretreatment system floor space.
Description
Technical field
Sewage-treatment plant is the utility model is related to, is exactly a kind of power plant desulfurization wastewater pretreatment unit, mainly
Suitable for the pretreatment of power plant desulfurization wastewater.
Background technology
Desulfurization wastewater is mainly the discharge water on absorption tower during boiler smoke wet desulphurization (limestone/gypsum method).
China is that maximum in the world coal production and country of consumption, ratio of the coal in energy structure in China are up to
76.2%, the SO2 of China's discharge has 90% to come from fire coal.In recent years, although China took Regulation Policy on Pollution Discharge Fee, but every year
SO2 discharge capacitys still above 20,000,000 tons, Acid Rain Pollution area expands rapidly, to China crops, forest and health etc.
Aspect causes huge infringement, also turns into an important factor for restricting China's economy, social sustainable development, therefore, to SO2 discharges
Control is imperative.
Flue gas desulfurization is the desulfurization method that unique large-scale commercial is applied in the world at present, is control sulfur dioxide pollution
Technical way.External flue gas desulfurization technique research starts from 1850s, and thousands of set flue gases existing at present take off
Sulphur device puts into operation.While sulfur dioxide pollution is successfully controlled, each developed country has formed flue gas desulfurization correlation
Environmental protection industry.China has begun to fragmentary flue gas desulfurization research from the sixties, and later stage eighties starting column is emphasis problem, but
Because this coal-fired partial fume flow is big, SO2 concentration is low, and technical difficulty is larger, and up to the present, the production domesticization compared with large-sized unit takes off
Sulphur equipment is still without compared with quantum jump.At present, by the introduction, absorption and digestion of foreign technology, more seat tools have been built up in recent years
There are commercial scale, effective desulfurization demonstration plant, laid a good foundation for the fast development of China's desulphurization market.
In desulphurization system running, due to the water in desulfurizer slurries can be enriched with during continuous circulation it is more
On the one hand kind metallic element and chlorion, these ions can accelerate the corrosion of desulphurization plant, on the other hand can also influence gypsum
Quality, therefore, in order to maintain the balance of desulfurizer serum recycle system material, prevent that soluble fraction i.e. cl concn surpasses in flue gas
Cross setting and ensure gypsum quality, it is necessary to a certain amount of waste water is discharged from system, waste water is essentially from gypsum dehydration and clearly
Wash system.The impurity contained in waste water mainly includes suspension, oversaturated sulphite, sulfate and heavy metal, wherein
It is much the first pollutant for requiring strictly to control in national environmental standard.
Prior art is mainly three header softenings+heavy metals removal+flocculation sediment clarification to the handling process of desulfurization wastewater,
This method reduces the hardness and heavy metal ion of waste water by adding softening medicament and heavy metal chelating agent, and this method is present
The shortcomings that chemical feeding quantity is big, complex process and floor space are big.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of power plant desulfurization wastewater pretreatment unit, and the device utilizes
Highly dense pool surface load is high, and floor space is small；Anti- load variations ability is strong, adapts to raw water quality wide fluctuations situation；Precipitation
Efficiency high, the characteristics of sludge solid content is high is discharged, reduce pretreatment system floor space.
In order to solve the above technical problems, the utility model uses following technological means：
A kind of power plant desulfurization wastewater pretreatment unit, including reaction tank, sedimentation basin and filtered water tank, set in described reaction tank
There is guide shell, agitator is provided with guide shell；The bottom of sedimentation basin is settling zone, and settling zone passes through sludge pump and sludge press filtration system
System connection, the top of settling zone are provided with inclined-tube reaction area, and inclined-tube reaction area is provided with spaced inclined tube, set at the top of settling zone
There is outlet canal, outlet canal is arranged on the top in inclined-tube reaction area, and outlet canal connects with filtered water tank.
By setting guide shell in reaction tank, it is stirred using the agitator in guide shell, the liquid allowed in reaction tank
Body forms circulation, it can be ensured that polymer stirring is sufficient and produces good flocculation；Set settling zone and inclined tube anti-in sedimentation basin
Area is answered, most of alumen ustum precipitates in the settling zone below inclined tube, and non-sediment fraction alumen ustum enters top inclined tube part, using oblique
Manage larger specific surface area and carry out the alumen ustum that precipitation removes residual, the water overflow clarified after the completion of precipitation enters outlet canal.
Further optimal technical scheme is as follows：
The bottom of described settling zone is connected by reflux pump with the bottom of reaction zone.
Caused partial sludge in sedimentation basin is delivered in reaction tank by reflux pump by sludge reflux pipeline, accelerates alumen ustum
Growth and increase the density of alumen ustum.
The front of described reaction tank is provided with quick stirring pool, and quick stirring pool is provided with medicine system.
Described medicine system is provided with the softening medicament A medicine systems to work independently, softens medicament B medicine systems, softening
Medicament C medicine systems, soften medicament D medicine systems and flocculant medicine system.
Quick stirring pool, after the magnetic valve being arranged on pipeline detects water, start be configured at quick stirring pool 4 sets
Soften medicine system, and open stirring, medicament is sufficiently mixed with waste water.
The front of described quick stirring pool is provided with buffer tank, and buffer tank is provided with pH regulation chemicals dosing plants.
Due to wet desulphurization waste water be mainly characterized by present faintly acid, pH value be less than 6.0, therefore waste water initially enter it is slow
Waste preventer, buffer tank is interior to be equipped with pH sensors, and after waste water enters buffer tank, the signal sensed is transferred to by pH sensors
In PLC system, system controls the chemical feeding quantity of pH regulating systems by analysis, and regulation wastewater pH is to 9-10, to be advantageous in waste water
Calcium and magnesium plasma precipitation.
Described settling zone is provided with funnelform precipitation and guides Turbogrid plates.
The centrally disposed funnelform precipitation guiding Turbogrid plates of the bottom of settling zone, precipitation guiding Turbogrid plates exit is set
Mud scraper, collection sludge is continuously swept, sets screw pump that partial sludge is back into reaction tank outside sedimentation basin, promotes reaction tank
The growth of alumen ustum.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Description of reference numerals：1- buffer tanks；The quick stirring pools of 2-；3- reaction tanks；4- sedimentation basins；5- filtered water tanks；6- is led
Flow cartridge；7- plug-flows area；8- outlet canals；9- softens medicament A medicine systems；10- softens medicament B medicine systems；11- softening medicaments C
Medicine system；12- softens medicament D medicine systems；13- flocculant medicine systems；14-pH adjusts chemicals dosing plant；15- inclined-tube reactions
Area；16- reflux pumps；17- sludge press filtration systems.
Embodiment
With reference to embodiment, the utility model is further illustrated.
It can be seen from Fig. 1, a kind of power plant desulfurization wastewater pretreatment unit of the present utility model, by reaction tank 3, sedimentation basin 4
And filtered water tank 5 forms；Guide shell 6 is provided with the reaction tank 3 of sludge press filtration system 17, agitator is provided with guide shell 6；Sedimentation basin 4
Bottom be settling zone, settling zone is connected by sludge pump with sludge press filtration system 17, and the top of settling zone is provided with inclined-tube reaction
Area 15, inclined-tube reaction area 15 are provided with spaced inclined tube, and the top of settling zone is provided with outlet canal 8, and outlet canal 8 is arranged on inclined tube
The top of reaction zone 15, outlet canal 8 connect with filtered water tank 5.
By setting guide shell 6 in the reaction tank 3, it is stirred, is allowed in reaction tank 3 using the agitator in guide shell 6
Liquid form circulation, it can be ensured that polymer stirring is sufficient simultaneously to produce good flocculation, and reaction tank is furnished with a set of flocculant dosing
System 13, by the addition of flocculant, the colloid in waste water and fine suspension is set to be more easy to be gathered into separable characteristic
Floccule body, form alumen ustum.By plug-flow area 7, overflow enters settling zone to waste water with alumen ustum at a slow speed, prevents alumen ustum from crushing, and influences
Sedimentation effect.Settling zone and inclined-tube reaction area 15 are set in sedimentation basin 4, and most of alumen ustum sinks in the settling zone below inclined tube
Form sediment, non-sediment fraction alumen ustum enters top inclined tube part, and the alum of precipitation removal residual is carried out using the larger specific surface area of inclined tube
Spend, the water overflow clarified after the completion of precipitation enters outlet canal 8.
The bottom of the settling zone of sludge press filtration system 17 is connected by reflux pump 16 with the bottom of reaction zone.
Caused partial sludge in sedimentation basin 4 is delivered in reaction tank 3 by reflux pump 16 by sludge reflux pipeline, is accelerated
The growth of alumen ustum and the density for increasing alumen ustum.
The front of the reaction tank 3 of sludge press filtration system 17 is provided with quick stirring pool 2, and quick stirring pool 2 is provided with medicine system.
The medicine system of sludge press filtration system 17 is provided with the softening medicament A medicine systems 9 to work independently, softens medicament B dosings
System 10, softening medicament C medicine systems 11, softening medicament D medicine systems 12 and flocculant medicine system 13.
Quick stirring pool 2, after the magnetic valve being arranged on pipeline detects water, startup is configured at the 4 of quick stirring pool 2
Set softening medicine system, and stirring is opened, medicament is sufficiently mixed with waste water.
The front of the quick stirring pool 2 of sludge press filtration system 17 is provided with buffer tank 1, and buffer tank 1 is provided with pH regulation dosings
Device.
Due to wet desulphurization waste water be mainly characterized by present faintly acid, pH value be less than 6.0, therefore waste water initially enter it is slow
Waste preventer 1, buffer tank 1 is interior to be equipped with pH sensors, and after waste water enters buffer tank 1, pH sensors pass the signal sensed
Defeated into PLC system, system controls the chemical feeding quantity of pH regulating systems by analysis, wastewater pH is adjusted to 9-10, to be advantageous to give up
The precipitation of calcium and magnesium plasma in water.
The settling zone of sludge press filtration system 17 is provided with funnelform precipitation and guides Turbogrid plates.
The centrally disposed funnelform precipitation guiding Turbogrid plates of the bottom of settling zone, precipitation guiding Turbogrid plates exit is set
Mud scraper, continuously sweeps collection sludge, and the outside of sedimentation basin 4 sets screw pump that partial sludge is back into reaction tank 3, promotes reaction
The growth of the alumen ustum of pond 3.
Due to the foregoing is only specific embodiment of the present utility model, but protection not limited to this of the present utility model,
Any those skilled in the art it is contemplated that the equivalent change of the technical program technical characteristic or replacement, all cover
Within the scope of protection of the utility model.
Claims (6)
1. a kind of power plant desulfurization wastewater pretreatment unit, including reaction tank, sedimentation basin and filtered water tank, it is characterised in that：Described
Guide shell is provided with reaction tank, agitator is provided with guide shell；The bottom of sedimentation basin is settling zone, settling zone by sludge pump with
Sludge press filtration system connectivity, the top of settling zone are provided with inclined-tube reaction area, and inclined-tube reaction area is provided with spaced inclined tube, precipitation
The top in area is provided with outlet canal, and outlet canal is arranged on the top in inclined-tube reaction area, and outlet canal connects with filtered water tank.
2. power plant desulfurization wastewater pretreatment unit according to claim 1, it is characterised in that：The bottom of described settling zone
Connected by reflux pump with the bottom of reaction zone.
3. power plant desulfurization wastewater pretreatment unit according to claim 1, it is characterised in that：The front of described reaction tank
Provided with quick stirring pool, quick stirring pool is provided with medicine system.
4. power plant desulfurization wastewater pretreatment unit according to claim 3, it is characterised in that：Described medicine system is provided with
The softening medicament A medicine systems of autonomous working, soften medicament B medicine systems, soften medicament C medicine systems, soften medicament D dosings
System and flocculant medicine system.
5. power plant desulfurization wastewater pretreatment unit according to claim 3, it is characterised in that：Described quick stirring pool
Front is provided with buffer tank, and buffer tank is provided with pH regulation chemicals dosing plants.
6. power plant desulfurization wastewater pretreatment unit according to claim 1, it is characterised in that：Described settling zone is provided with leakage
Bucket-shaped precipitation guiding Turbogrid plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720863945.5U CN207031141U (en) | 2017-07-17 | 2017-07-17 | A kind of power plant desulfurization wastewater pretreatment unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720863945.5U CN207031141U (en) | 2017-07-17 | 2017-07-17 | A kind of power plant desulfurization wastewater pretreatment unit |
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| Publication Number | Publication Date |
|---|---|
| CN207031141U true CN207031141U (en) | 2018-02-23 |
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| CN201720863945.5U Active CN207031141U (en) | 2017-07-17 | 2017-07-17 | A kind of power plant desulfurization wastewater pretreatment unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109133436A (en) * | 2018-10-26 | 2019-01-04 | 济南森华工程技术有限公司 | A kind of integrated desulfurization wastewater treatment equipment |
-
2017
- 2017-07-17 CN CN201720863945.5U patent/CN207031141U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109133436A (en) * | 2018-10-26 | 2019-01-04 | 济南森华工程技术有限公司 | A kind of integrated desulfurization wastewater treatment equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A pretreatment device for desulfurization wastewater in power plant Effective date of registration: 20210128 Granted publication date: 20180223 Pledgee: Bank of China Limited Yantai bonded port area sub branch Pledgor: YANTAI JINZHENG ECO-TECHNOLOGY Co.,Ltd. Registration number: Y2021980000792 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231207 Granted publication date: 20180223 Pledgee: Bank of China Limited Yantai bonded port area sub branch Pledgor: YANTAI JINZHENG ECO-TECHNOLOGY Co.,Ltd. Registration number: Y2021980000792 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |