CN108033604A - A kind of heat-engine plant desulfurized discharged wastewater met the national standard processing system and method - Google Patents
A kind of heat-engine plant desulfurized discharged wastewater met the national standard processing system and method Download PDFInfo
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- CN108033604A CN108033604A CN201810041034.3A CN201810041034A CN108033604A CN 108033604 A CN108033604 A CN 108033604A CN 201810041034 A CN201810041034 A CN 201810041034A CN 108033604 A CN108033604 A CN 108033604A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title abstract description 14
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 94
- 230000023556 desulfurization Effects 0.000 claims abstract description 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000000126 substance Substances 0.000 claims abstract description 38
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 35
- 238000004062 sedimentation Methods 0.000 claims abstract description 30
- 238000005273 aeration Methods 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 238000005189 flocculation Methods 0.000 claims abstract description 24
- 230000016615 flocculation Effects 0.000 claims abstract description 21
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 17
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 17
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 17
- 125000001741 organic sulfur group Chemical group 0.000 claims abstract description 13
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 14
- 239000005416 organic matter Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 10
- 239000003344 environmental pollutant Substances 0.000 claims description 10
- 231100000719 pollutant Toxicity 0.000 claims description 10
- 239000010802 sludge Substances 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- 239000005864 Sulphur Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 239000013049 sediment Substances 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000003672 processing method Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 3
- 238000005276 aerator Methods 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 239000000356 contaminant Substances 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- -1 iron ion Chemical class 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical compound [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 abstract description 2
- 229910052602 gypsum Inorganic materials 0.000 description 7
- 239000010440 gypsum Substances 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 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
- 239000003513 alkali Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000036642 wellbeing Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a kind of heat-engine plant desulfurized discharged wastewater met the national standard processing system and method, including desulfurization wastewater input channel, preliminary sedimentation tank, heavy metal reactor, calcium hydroxide chemicals dosing plant, organic sulfur chemicals dosing plant, NaClO chemicals dosing plants, aeration reaction pond, intermediate pool, electric flocculation device, centrifugal concentrating pond, more medium filter and clear water reserviors, the system and method can realize the centralized processing to power plant desulfurization wastewater, and the stabilizing water quality of desulfurization wastewater emission request can be met after handling.
Description
Technical field
The present invention relates to a kind of heat-engine plant desulfurized waste water treatment system and method, and in particular to a kind of heat-engine plant desulfurized waste water
Qualified discharge processing system and method.
Background technology
In recent years, increasingly stringent with national environmental standard and policy, Pollutant Discharge Permit System is to row thermal power plant outside
Water quantity and quality, which is made, to be distinctly claimed, some developed areas or ecological sensitive areas domain the factory's waste water that to have demanded perfection realize zero-emission.
In this context, more and more coal-burning power plants put on agenda zero-emission, wherein desulfurization wastewater because of its water quality inferiority, be difficult to
The characteristics of reuse, be the key that whole coal-burning power plant realizes zero-emission.Removing at present has a small number of power plant can be by desulfurization wastewater by returning
Consumed for hydraulic flushing ash or the sprinkling of grey field, slag removing system and realizing outer in factory, most of power plant still can not reuse.Due to mesh
There are more problems, such as system dirt easily occurs for the traditional three header treatment facility medicine system of desulfurization wastewater of preceding majority power plant
Block up, go out aqueous suspension is not up to standard, effluent quality is unstable etc..Power plant uses desulfurization wastewater after concentration more at present, into
Row evaporative crystallization or smoke evaporative are to realize desulfurization wastewater zero-emission.If being not provided with desulfurization wastewater qualified discharge processing system,
Contain heavy metal in crystal salt or ash content, dangerous solid waste can only be used as to send professional solid waste processing center to handle,
Processing cost is high.Therefore, it is necessary to carry out qualified discharge processing to desulfurization wastewater first, remove heavy metal therein, fluorine ion with
And suspended impurity etc., water quality reaches after making processing《Thermal power plant Limestone-gypsum Wet Flue Gas Desulfurization Process waste water quality Con trolling index (DL/
T997-2006)》Related request.
Desulfurization wastewater caused by heat-engine plant wet flue gas desulfurization has complicated pollutant component, organic matter and ammonia-nitrogen content
High, the features such as variation water quality scope is big, the impurity contained in desulfurization wastewater mainly include suspended matter, oversaturated sulphite,
Sulfate and heavy metal；Some of which is that the first pollutant of control is required in national environmental standard.In desulfurization wastewater
Various heavy metal ion have environment pollution, and water quality is more special, and intractability is larger, therefore, it is necessary to desulfurization wastewater into
Row individually processing.
Widely applied desulfuration waste water treatment process is the pure chemistry precipitation method in coal-burning power plant of China, the process operation
It is advantage of lower cost, experienced, but it is difficult there are equipment operation maintenance, and sludge yield is greatly and disposal is difficult, water outlet COD
It is not easy with SS (suspended matter) up to standard, water outlet may cause secondary pollution problems after being directly discharged into environment.
The content of the invention
A kind of the shortcomings that it is an object of the invention to overcome the above-mentioned prior art, there is provided heat-engine plant desulfurized wastewater to reach standard row
Processing system and method are put, which can realize the centralized processing to power plant desulfurization wastewater, and can be with after handling
It is met the stabilizing water quality of desulfurization wastewater emission request.
To reach above-mentioned purpose, heat-engine plant desulfurized discharged wastewater met the national standard processing system of the present invention includes desulfurization wastewater
Input channel, preliminary sedimentation tank, heavy metal reactor, calcium hydroxide chemicals dosing plant, organic sulfur chemicals dosing plant, NaClO chemicals dosing plants, exposure
Solid/liquid/gas reactions pond, intermediate pool, electric flocculation device, centrifugal concentrating pond, more medium filter and clear water reserviors；
The outlet of desulfurization wastewater input channel is connected with the entrance of preliminary sedimentation tank, is provided with the middle part of heavy metal reactor excessive
Partition plate is flowed, wherein, the outlet of the water outlet and calcium hydroxide chemicals dosing plant of preliminary sedimentation tank and the front side entrance phase of heavy metal reactor
Connection, the outlet of organic sulfur chemicals dosing plant is connected with the rear side entrance of heavy metal reactor, the outlet of heavy metal reactor and
The outlet of NaClO chemicals dosing plants is connected with the entrance in aeration reaction pond, the outlet in aeration reaction pond successively through intermediate pool and
Electric flocculation device is connected with the entrance in centrifugal concentrating pond, and the water outlet in centrifugal concentrating pond is connected with the entrance of more medium filter
Logical, the clear water output of more medium filter is connected with the entrance of clear water reserviors.
The outlet at bottom of preliminary sedimentation tank is communicated with desulfuration absorbing tower.
The first mud discharging device is provided with the outlet at bottom of intermediate pool, is provided with the outlet at bottom in centrifugal concentrating pond
Two mud discharging devices, wherein, the outlet of the first mud discharging device and the outlet of the second mud discharging device are connected with the entrance of sludge filter press
Logical, the liquid outlet of sludge filter press is connected with the entrance of preliminary sedimentation tank.
The backwash water out of more medium filter is connected with intermediate pool.
Heat-engine plant desulfurized discharged wastewater met the national standard processing method of the present invention comprises the following steps：
1) desulfurization wastewater of desulfurization wastewater input channel output, which enters, carries out homogeneous adjusting in preliminary sedimentation tank, remove desulfurization wastewater
In suspended matter, the bulky grain that easily deposits and partial organic substances, the sediment of preliminary sedimentation tank bottom enter in desulfuration absorbing tower,
The desulfurization wastewater of preliminary sedimentation tank output is entered in heavy metal reactor, and the calcium hydroxide of calcium hydroxide chemicals dosing plant output enters
In the front side of heavy metal reactor, the organic sulfur of organic sulfur chemicals dosing plant output is entered in the rear side of heavy metal reactor, is led to
Cross the Fe in calcium hydroxide and organic removal of sulphur desulfurization wastewater3+、Zn2+、Cu2+、Ni2+、Cr3+、Pb2+、Hg2+, part Mg2+And portion
Divide SO4 2-, heavy metal reactor output desulfurization wastewater enter in aeration reaction pond；
2) liquor natrii hypochloritis of NaClO chemicals dosing plants output is entered in aeration reaction pond, passes through aeration reaction bottom of pond
The blender and aerator in portion, make liquor natrii hypochloritis come into full contact with reaction with the organic matter in desulfurization wastewater and ammonia nitrogen, and
The organic matter and ammonia nitrogen that remove in desulfurization wastewater are combined with aeration using liquor natrii hypochloritis, to reduce in desulfurization wastewater
COD and ammonia-nitrogen content, the desulfurization wastewater of aeration reaction pond output, which enters in intermediate pool, carries out separating clarifying；
3) supernatant of intermediate pool output is entered in electric flocculation device, and using electric flocculation device sacrificial anode de-
Aluminium ion or iron ion are produced in sulphur waste water, and then produces the aluminium either hydroxo complex of iron and with aluminium or the hydroxyl network of iron
Compound is as flocculant, by compression double electric layer, adsorption bridging and the effect of catching of collection reel wire by suspended matter in desulfurization wastewater and organic
The contaminants sedimentation of thing, meanwhile, the hydrogen that electric flocculation device cathode produces forms bubble and adsorbs on small flco surface,
The small flco for making to be difficult to settle rises to liquid surface, finally realizes the separation of pollutant and desulfurization wastewater, is removed with reaching
The purpose of pollutant, the desulfurization wastewater of electric flocculation device output, which enters, carries out separation of solid and liquid, centrifugal concentrating in centrifugal concentrating pond
The clear water that pond separation comes enters more medium filter and carries out filtration treatment, and the clear water of more medium filter output enters clear water
Chi Zhong.
The concentration available chlorine content of liquor natrii hypochloritis is 10%.
The invention has the advantages that：
Heat-engine plant desulfurized discharged wastewater met the national standard processing system and method for the present invention are in concrete operations, using chemistry
The treatment process that processing, chemical coagulation and electric flocculation system electrochemical method are combined carries out at qualified discharge desulfurization wastewater
Reason, not only makes effluent quality more preferable, and solves traditional desulfurization wastewater and handle that three header system effluent qualities are unstable, easy dirt
Stifled phenomenon, can effectively remove heavy metal, fluoride and suspended matter, the improvement desulfurization such as the lead in desulfurization wastewater, mercury, chromium and give up
Water effluent quality, it is ensured that the desulfurization waste water quality after processing meets《Thermal power plant's Limestone-gypsum Wet Flue Gas Desulfurization Process waste water quality control
Index (DL/T 997-2006)》Related request, greatly reduce thermal power plant's environmental protection risk, environmental protection benefit is obvious.Specifically
, the present invention is using sodium hypochlorite and the organic matter and ammonia nitrogen in aeration Combined Treatment desulfurization wastewater is added, to realize desulfurization
Effective removal of useless Organic substance in water and ammonia nitrogen, reduces the content of organic matter and ammonia nitrogen in desulfurization wastewater, it is ensured that effluent quality
Stability.In addition, the present invention substitutes three traditional header treatment process using electric flocculation process system, to reduce the failure of system
Rate, improves operating environment, and the bubble by being produced in flocculation process makes to remove pollutant from water, while through heavy metal
Desulfurization wastewater after reactor and electric flocculation process carries out filtration treatment by more medium filter, ensures that desulfurization wastewater goes out
The water quality stability of water.
Further, the sludge of preliminary sedimentation tank bottom is entered in desulfuration absorbing tower, with the gypsum slurries one in desulfuration absorbing tower
Rise and handled through gypsum dehydration, to reduce the mud amount of system, reduce the risk that system sludge blocks, increase the yield of gypsum.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention.
Wherein, 1 be desulfurization wastewater input channel, 2 be preliminary sedimentation tank, 3 be desulfuration absorbing tower, 4 attach most importance to metallic reactors, 5 be
Calcium hydroxide chemicals dosing plant, 6 be organic sulfur chemicals dosing plant, 7 be aeration reaction pond, 8 be NaClO chemicals dosing plants, 9 be middle water
Pond, 10 be electric flocculation device, 11 be centrifugal concentrating pond, 12 be more medium filter, 13 be sludge filter press, 14 be clear water reserviors.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1, heat-engine plant desulfurized discharged wastewater met the national standard processing system of the present invention is inputted including desulfurization wastewater
Pipeline 1, preliminary sedimentation tank 2, heavy metal reactor 4, calcium hydroxide chemicals dosing plant 5, organic sulfur chemicals dosing plant 6, NaClO chemicals dosing plants 8,
Aeration reaction pond 7, intermediate pool 9, electric flocculation device 10, centrifugal concentrating pond 11, more medium filter 12 and clear water reserviors 14；Desulfurization
The outlet of waste water input channel 1 is connected with the entrance of preliminary sedimentation tank 2, and the middle part of heavy metal reactor 4 is provided with weir divider, its
In, the outlet of water outlet and calcium hydroxide chemicals dosing plant 5 of preliminary sedimentation tank 2 is connected with the front side entrance of heavy metal reactor 4, has
The outlet of machine sulphur chemicals dosing plant 6 is connected with the rear side entrance of heavy metal reactor 4, the outlet of heavy metal reactor 4 and NaClO
The outlet of chemicals dosing plant 8 is connected with the entrance in aeration reaction pond 7, and the outlet in aeration reaction pond 7 is successively through intermediate pool 9 and electricity
Flocculation plant 10 is connected with the entrance in centrifugal concentrating pond 11, the water outlet in centrifugal concentrating pond 11 and entering for more medium filter 12
Mouth is connected, and the clear water output of more medium filter 12 is connected with the entrance of clear water reserviors 14.
The outlet at bottom of preliminary sedimentation tank 2 is communicated with desulfuration absorbing tower 3；First row is provided with the outlet at bottom of intermediate pool 9
Mud device, is provided with the second mud discharging device at the outlet at bottom in centrifugal concentrating pond 11, wherein, the outlet of the first mud discharging device and
The outlet of two mud discharging devices is connected with the entrance of sludge filter press 13, liquid outlet and the preliminary sedimentation tank 2 of sludge filter press 13
Entrance is connected；The backwash water out of more medium filter 12 is connected with intermediate pool 9.
Heat-engine plant desulfurized discharged wastewater met the national standard processing method of the present invention comprises the following steps：
1) desulfurization wastewater that desulfurization wastewater input channel 1 exports, which enters, carries out homogeneous adjusting in preliminary sedimentation tank 2, remove desulfurization and give up
Suspended matter in water, the bulky grain easily deposited and partial organic substances, the sediment of 2 bottom of preliminary sedimentation tank enter desulfuration absorbing tower
In 3 desulfurization slurry entrance, the desulfurization wastewater that preliminary sedimentation tank 2 exports is entered in heavy metal reactor 4, wherein, 2 bottom of preliminary sedimentation tank
Sediment main component be gypsum, the sediment of 2 bottom of preliminary sedimentation tank is entered in desulfuration absorbing tower 3, and ultimately forms gypsum,
The calcium hydroxide that calcium hydroxide chemicals dosing plant 5 exports is entered in the front side of heavy metal reactor 4, and organic sulfur chemicals dosing plant 6 is defeated
The organic sulfur gone out is entered in the rear side of heavy metal reactor 4, passes through the Fe in calcium hydroxide and organic removal of sulphur desulfurization wastewater3 +、Zn2+、Cu2+、Ni2+、Cr3+、Pb2+、Hg2+, part Mg2+With part SO4 2-, the remaining dirt for needing to remove in desulfurization wastewater at this time
Dye thing is substantial amounts of Ca2+, organic matter, ammonia nitrogen and a small amount of Mg2+Ion, the desulfurization wastewater that heavy metal reactor 4 exports enter
Into aeration reaction pond 7；
2) liquor natrii hypochloritis of sodium hypochlorite medicine adding device output is entered in aeration reaction pond 7, passes through aeration reaction
The blender and aerator of 7 bottom of pond, make liquor natrii hypochloritis be come into full contact with instead with the organic matter in desulfurization wastewater and ammonia nitrogen
Should, and the organic matter and ammonia nitrogen that remove in desulfurization wastewater are combined with aeration using liquor natrii hypochloritis, to reduce desulfurization wastewater
In COD and ammonia-nitrogen content, aeration reaction pond 7 export desulfurization wastewater enter intermediate pool 9 in carries out separating clarifying；
3) supernatant that intermediate pool 9 exports is entered in electric flocculation device 10, and sacrifices sun using electric flocculation device 10
Pole produces aluminium ion or iron ion in desulfurization wastewater, and then produces the aluminium either hydroxo complex of iron and with aluminium or iron
Hydroxo complex is caught and is acted on suspended matter in desulfurization wastewater by compression double electric layer, adsorption bridging and collection reel wire as flocculant
And organic matter contaminants and adsorb on compression double electric layer, adsorption bridging and the surface caught of collection reel wire, meanwhile, electric flocculation dress
Put the hydrogen formation bubble of 10 cathodes generation and adsorb and rise to liquid in small flco surface, the small flco for making to be difficult to settle
Surface, finally realizes the separation of pollutant and desulfurization wastewater, to achieve the purpose that to remove pollutant, what electric flocculation device 10 exported
Desulfurization wastewater enters centrifugal concentrating pond 11 and carries out separation of solid and liquid, and the clear water that the separation of centrifugal concentrating pond 11 comes enters multimedium mistake
Filter 12 carries out filtration treatment, to get rid of suspended matter tiny in desulfurization wastewater, meets the desulfurization wastewater after processing corresponding
Standard requirement, more medium filter 12 export clear water enter in clear water reserviors 14.
From the point of view of resource reclaim, desulfurization wastewater after qualified discharge is handled, fluoride in water, metal ion and
Harmful heavy metal can remove, and the crystal salt that not only avoid the generation of zero-emission from now on is identified as dangerous solid waste, and
And it can subsequently obtain chemical raw material of the NaCl salt of high-purity as chemical industry for making chlorine and alkali industry by dividing salt crystallization treatment, obtain
Economic well-being of workers and staff.
Claims (6)
- A kind of 1. heat-engine plant desulfurized discharged wastewater met the national standard processing system, it is characterised in that including desulfurization wastewater input channel (1), Preliminary sedimentation tank (2), heavy metal reactor (4), calcium hydroxide chemicals dosing plant (5), organic sulfur chemicals dosing plant (6), NaClO chemicals dosing plants (8), aeration reaction pond (7), intermediate pool (9), electric flocculation device (10), centrifugal concentrating pond (11), more medium filter (12) And clear water reserviors (14)；The outlet of desulfurization wastewater input channel (1) is connected with the entrance of preliminary sedimentation tank (2), and heavy metal reactor is set in the middle part of (4) Weir divider is equipped with, wherein, outlet and the heavy metal reactor of the water outlet and calcium hydroxide chemicals dosing plant (5) of preliminary sedimentation tank (2) (4) front side entrance is connected, and the outlet of organic sulfur chemicals dosing plant (6) is connected with the rear side entrance of heavy metal reactor (4), The outlet of heavy metal reactor (4) and the outlet of NaClO chemicals dosing plants (8) are connected with the entrance of aeration reaction pond (7), aeration The outlet of reaction tank (7) is connected through intermediate pool (9) and electric flocculation device (10) with the entrance of centrifugal concentrating pond (11) successively, The water outlet in centrifugal concentrating pond (11) is connected with the entrance of more medium filter (12), the Graceful of more medium filter (12) Mouth is connected with the entrance of clear water reserviors (14).
- 2. heat-engine plant desulfurized discharged wastewater met the national standard processing system according to claim 1, it is characterised in that preliminary sedimentation tank (2) Outlet at bottom be communicated with desulfuration absorbing tower (3).
- 3. heat-engine plant desulfurized discharged wastewater met the national standard processing system according to claim 1, it is characterised in that intermediate pool (9) the first mud discharging device is provided with outlet at bottom, the second spoil disposal dress is provided with the outlet at bottom of centrifugal concentrating pond (11) Put, wherein, the outlet of the first mud discharging device and the outlet of the second mud discharging device are connected with the entrance of sludge filter press (13), dirty The liquid outlet of mud filter press (13) is connected with the entrance of preliminary sedimentation tank (2).
- 4. heat-engine plant desulfurized discharged wastewater met the national standard processing system according to claim 1, it is characterised in that multi-medium filtering The backwash water out of device (12) is connected with intermediate pool (9).
- 5. a kind of heat-engine plant desulfurized discharged wastewater met the national standard processing method, it is characterised in that based on the thermal power plant described in claim 1 Desulfurization wastewater qualified discharge processing system, comprises the following steps：1) desulfurization wastewater of desulfurization wastewater input channel (1) output, which enters, carries out homogeneous adjusting in preliminary sedimentation tank (2), remove desulfurization and give up Suspended matter in water, the bulky grain easily deposited and partial organic substances, the sediment of preliminary sedimentation tank (2) bottom enter desulfurization absorption In tower (3), the desulfurization wastewater of preliminary sedimentation tank (2) output is entered in heavy metal reactor (4), and calcium hydroxide chemicals dosing plant (5) is defeated The calcium hydroxide gone out is entered in the front side of heavy metal reactor (4), and the organic sulfur of organic sulfur chemicals dosing plant (6) output enters In the rear side of heavy metal reactor (4), pass through the Fe in calcium hydroxide and organic removal of sulphur desulfurization wastewater3+、Zn2+、Cu2+、Ni2+、 Cr3+、Pb2+、Hg2+, part Mg2+With part SO4 2-, heavy metal reactor (4) output desulfurization wastewater enter aeration reaction pond (7) in；2) liquor natrii hypochloritis of NaClO chemicals dosing plants (8) output is entered in aeration reaction pond (7), passes through aeration reaction pond (7) blender and aerator of bottom, makes liquor natrii hypochloritis be come into full contact with instead with the organic matter in desulfurization wastewater and ammonia nitrogen Should, and the organic matter and ammonia nitrogen that remove in desulfurization wastewater are combined with aeration using liquor natrii hypochloritis, to reduce desulfurization wastewater In COD and ammonia-nitrogen content, aeration reaction pond (7) output desulfurization wastewater enter intermediate pool (9) in carry out separating clarifying；3) supernatant of intermediate pool (9) output is entered in electric flocculation device (10), and is sacrificed using electric flocculation device (10) Anode produces aluminium ion or iron ion in desulfurization wastewater, and then produces the aluminium either hydroxo complex of iron and with aluminium or iron Hydroxo complex as flocculant, will be suspended by compression double electric layer, adsorption bridging and the effect of catching of collection reel wire in desulfurization wastewater The contaminants of thing and organic matter settle, meanwhile, the hydrogen that electric flocculation device (10) cathode produces forms bubble and adsorbs Small flco surface, the small flco for making to be difficult to settle rise to liquid surface, finally realize point of pollutant and desulfurization wastewater From to achieve the purpose that to remove pollutant, the desulfurization wastewater of electric flocculation device (10) output is entered in centrifugal concentrating pond (11) Separation of solid and liquid is carried out, the clear water that centrifugal concentrating pond (11) separation comes enters more medium filter (12) and carries out filtration treatment, more The clear water of medium filter (12) output is entered in clear water reserviors (14).
- 6. heat-engine plant desulfurized discharged wastewater met the national standard processing method according to claim 5, it is characterised in that sodium hypochlorite is molten The concentration available chlorine content of liquid is 10%.
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