CN107935286A - The processing system of thermal power plant desulfurization wastewater - Google Patents

The processing system of thermal power plant desulfurization wastewater Download PDF

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Publication number
CN107935286A
CN107935286A CN201711249538.6A CN201711249538A CN107935286A CN 107935286 A CN107935286 A CN 107935286A CN 201711249538 A CN201711249538 A CN 201711249538A CN 107935286 A CN107935286 A CN 107935286A
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China
Prior art keywords
filter
outlet
import
processing
desulfurization wastewater
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Granted
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CN201711249538.6A
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Chinese (zh)
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CN107935286B (en
Inventor
王可为
徐秀萍
葛小玲
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State Nuclear Electric Power Planning Design and Research Institute Co Ltd
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State Nuclear Electric Power Planning Design and Research Institute Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/041Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/442Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56Macromolecular compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds

Abstract

The invention discloses a kind of processing system of thermal power plant desulfurization wastewater, belong to desulfurization wastewater process field.The processing system includes:Wastewater collection pond, for collecting desulfurization wastewater;The clarifying basin of the outlet of import and wastewater collection pond, for precipitating and separating the suspended matter in desulfurization wastewater;The reactor that import is connected with the first outlet of clarifying basin, for precipitating the calcium ions and magnesium ions in desulfurization wastewater, obtains the level-one sediment containing calcium ions and magnesium ions;The first filter of the outlet of import and reactor, for level-one sediment to be separated with desulfurization wastewater;The heavy metal collector that import is connected with the first outlet of first filter, for precipitating the heavy metal ion in desulfurization wastewater, obtains the two-stage precipitation thing containing heavy metal ion;Second filter of the outlet of the first import and heavy metal collector, for two-stage precipitation thing to be separated with desulfurization wastewater.The present invention can separate suspended matter in desulfurization wastewater, calcium ions and magnesium ions, heavy metal ion successively.

Description

The processing system of thermal power plant desulfurization wastewater
Technical field
The present invention relates to desulfurization wastewater process field, more particularly to a kind of processing system of thermal power plant desulfurization wastewater.
Background technology
When thermal power plant carries out desulfurization process using limestone-gypsum method to flue gas, in the desulfurization wastewater discharged Containing impurity such as suspended matter, calcium ions and magnesium ions, heavy metals, if not handled desulfurization wastewater, directly outer row, pollutes the environment, It is therefore desirable to provide a kind of processing system of thermal power plant desulfurization wastewater.
The prior art provides a kind of processing system of thermal power plant desulfurization wastewater, which includes:Wastewater collection pond; Three headers of the outlet of import and wastewater collection pond, for precipitating the suspended matter in desulfurization wastewater, calcium ions and magnesium ions, heavy metal Deng impurity;Import and the clarifying basin of the outlet of three headers, for separating the sediment in desulfurization wastewater;Import and clarifying basin Outlet sludge delivery pump;The sludge dewatering system of the outlet of import and sludge delivery pump, is used to prepare mud cake.
Inventor has found that the prior art has at least the following problems:
Contain heavy metal ion in above-mentioned mud cake, if mud cake to be arbitrarily discarded in grey factory, heavy metal ion can with rainwater into Enter rainwash and groundwater regime, cause the secondary pollution of environment.
The content of the invention
An embodiment of the present invention provides a kind of processing system of thermal power plant desulfurization wastewater, can solve the above problems. The technical solution is as follows:
A kind of processing system of thermal power plant desulfurization wastewater, the processing system include:
Wastewater collection pond, for collecting desulfurization wastewater;
Import and the clarifying basin of the outlet of the wastewater collection pond, for precipitating and separating in the desulfurization wastewater Suspended matter;
The reactor that import is connected with the first outlet of the clarifying basin, for precipitate the calcium and magnesium in the desulfurization wastewater from Son, obtains the level-one sediment containing the calcium ions and magnesium ions;
The first filter of the outlet of import and the reactor, for by the level-one sediment and desulfurization wastewater Separation;
The heavy metal collector that import is connected with the first outlet of the first filter, gives up for precipitating the desulfurization Heavy metal ion in water, obtains the two-stage precipitation thing containing the heavy metal ion;
Second filter of the outlet of the first import and the heavy metal collector, for by the two-stage precipitation Thing is separated with desulfurization wastewater.
As in a kind of possible design, the processing system further includes:Import and the outlet of second filter connect Logical crystallization apparatus.
As in a kind of possible design, the processing system further includes:Enrichment facility;
The import of the enrichment facility and the outlet of second filter, first outlet and the crystallization apparatus Inlet communication.
As in a kind of possible design, the processing system further includes:Nanofiltration device, for the desulfurization wastewater into Row divides salt treatment;
The import of the nanofiltration device and the outlet of second filter, outlet and the import of the enrichment facility Connection.
As in a kind of possible design, the processing system further includes:Backwash water tank, for cleaning second filtering Device;
The import of the backwash water tank is connected with the second outlet of the enrichment facility, outlet and second filter Second inlet communication.
As in a kind of possible design, second filter includes:Grade one filter, secondary filter;
First import of the grade one filter and the outlet of the heavy metal collector, first outlet with it is described First inlet communication of secondary filter;
The inlet communication of the first outlet of the secondary filter and the nanofiltration device.
As in a kind of possible design, the grade one filter is double medium filters.
As in a kind of possible design, the filter medium of the grade one filter includes the anthracite and quartz of stacking Sand;
The filter medium of the secondary filter is nanometer membrane filter.
As in a kind of possible design, the processing system further includes:
The first dewaterer that import is connected with the second outlet of the clarifying basin, for drying the suspended matter;
The second dewaterer that import is connected with the second outlet of the first filter, for drying the level-one precipitation Thing;
The 3rd dewaterer that import is connected with the second outlet of the grade one filter, sinks for two level described in drying nest Starch;
The 4th dewaterer that import is connected with the second outlet of the secondary filter, for drying described in remainder Two-stage precipitation thing.
The beneficial effect that technical solution provided in an embodiment of the present invention is brought is:
Processing system provided in an embodiment of the present invention is received by being provided with clarifying basin, reactor, first filter, heavy metal Acquisition means, the second filter, can carry out fractional precipitation with dividing to the suspended matter in desulfurization wastewater, calcium ions and magnesium ions, heavy metal ion From, be both avoided that mud cake of the prior art contained heavy metal ion, also can to the suspended matter in desulfurization wastewater, calcium ions and magnesium ions into Row recycles, and reduces the operating cost of desulfurization wastewater.
Brief description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for For those of ordinary skill in the art, without creative efforts, other can also be obtained according to these attached drawings Attached drawing.
Fig. 1 is the structure diagram of the processing system of thermal power plant desulfurization wastewater provided in an embodiment of the present invention.
Each label in attached drawing is illustrated below:
1- wastewater collection ponds;
2- clarifying basins;
3- reactors;
4- first filters;
5- heavy metal collectors;
The second filters of 6-;
601- grade one filters;
602- secondary filters;
7- crystallization apparatus;
8- enrichment facilities;
9- nanofiltration devices;
10- back suction water tanks;
The first dewaterers of 11-;
The second dewaterers of 12-;
The 3rd dewaterers of 13-;
The 4th dewaterers of 14-.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention Formula is described in further detail.
An embodiment of the present invention provides a kind of processing system of thermal power plant desulfurization wastewater, as shown in Figure 1, the processing system System includes:Wastewater collection pond 1, for collecting desulfurization wastewater;Import and the clarifying basin 2 of the outlet of wastewater collection pond 1, are used for Precipitate and separate the suspended matter in desulfurization wastewater;The reactor 3 that import is connected with the first outlet of clarifying basin 2, it is de- for precipitating Calcium ions and magnesium ions in sulphur waste water, obtain the level-one sediment containing calcium ions and magnesium ions;Import and the first of the outlet of reactor 3 Filter 4, for level-one sediment to be separated with desulfurization wastewater;The huge sum of money that import is connected with the first outlet of first filter 4 Belong to collection device 5, for precipitating the heavy metal in desulfurization wastewater, obtain the two-stage precipitation thing containing heavy metal ion;Import with Second filter 6 of the outlet of heavy metal collector 5, for two-stage precipitation thing to be separated with desulfurization wastewater.
It should be noted that for the ease of the processing system to thermal power plant desulfurization wastewater provided in an embodiment of the present invention The course of work be described, the desulfurization wastewater after oil removal will be gone to be known as first grade desulfurizing waste water, go oil removal, calcium and magnesium from Desulfurization wastewater after son is known as two-grade desulfurizing waste water, and the desulfurization wastewater gone after oil removal, calcium ions and magnesium ions, heavy metal ion is known as Three-level desulfurization wastewater.Then, it is two-grade desulfurizing water and the mixed solution of level-one sediment into the solution of first filter 4;Into The solution of second filter 6 is three-level desulfurization water and the mixed solution of two-stage precipitation thing.
The operation principle with regard to the processing system of thermal power plant desulfurization wastewater provided in an embodiment of the present invention, which is given, below retouches State:
Desulfurization wastewater is initially entered and stored to wastewater collection pond 1, is then flowed into clarifying basin 2, and into clarifying basin 2 Coagulant (such as polymeric iron, polymeric aluminum, polyaluminum ferric chloride etc.), flocculation aid (such as polyacrylamide) are added, desulfurization is given up Suspended matter in water sinks down into the bottom of clarifying basin 2 in a manner of physical sedimentation.
After the turbidity of the supernatant in clarifying basin 2 meets standard, for example, the turbidity of the supernatant in clarifying basin 2 Less than or equal to 15NTU (Nephelometric Turbidity Unit, nephelometric turbidity unit), by supernatant, (i.e. level-one takes off Sulphur waste water) it is delivered in reactor 3, and pH adjusting agent, reactant (such as phosphate, ammonium salt etc.) are added into reactor 3, make Calcium ions and magnesium ions generation level-one sediment (such as calcium phosphate, ammonium magnesium phosphate) in first grade desulfurizing waste water;Afterwards, two-grade desulfurizing waste water Entered to level-one sediment in first filter 4, first filter 4 filters the level-one sediment in two-grade desulfurizing waste water.
Two-grade desulfurizing waste water is entered in heavy metal collector 5, and adds precipitating reagent into heavy metal collector 5 (such as sodium hydroxide, organic sulfur), flocculant (polyaluminium sulfate) utilize electrochemical means by the weight in two-grade desulfurizing waste water Metal ion is precipitated out in the form of hydroxide, sulfide or simple substance, i.e., by the heavy metal ion in two-grade desulfurizing waste water Generate two-stage precipitation thing;Afterwards, three-level desulfurization wastewater is flowed into the second filter 6 with two-stage precipitation thing, 6 mistake of the second filter Filter the two-stage precipitation thing in three-level desulfurization wastewater.
As it can be seen that processing system provided in an embodiment of the present invention by be provided with clarifying basin 2, reactor 3, first filter 4, Heavy metal collector 5, the second filter 6, can divide the suspended matter in desulfurization wastewater, calcium ions and magnesium ions, heavy metal ion Level precipitation with separating, be both avoided that mud cake of the prior art contained heavy metal ion, also can to the suspended matter in desulfurization wastewater, Calcium ions and magnesium ions are recycled, and reduce the operating cost of desulfurization wastewater.
Due to also containing sodium salt in desulfurization wastewater, after the heavy metal ion in desulfurization wastewater to be removed, separable desulfurization is given up Sodium salt in water, and transport to alkali factory, salinization factory, to improve the resource utilization of desulfurization wastewater.Therefore, as shown in Figure 1, originally In inventive embodiments, which further includes:Import and the crystallization apparatus 7 of the outlet of the second filter 6.
Above-mentioned crystallization apparatus 7 can crystallize out sodium salt from the 3rd desulfurization wastewater, and solid-state salt particle is made;In addition, the Distilled water after the crystallized device 7 of three desulfurization wastewaters crystallizes may be recovered utilization.
Wherein, the 3rd desulfurization wastewater after separation of heavy metal ions mainly includes sodium chloride, sodium sulphate and water, and chlorination Sodium, the total mass fraction of sodium sulphate are only 4%, in order to rapidly crystallize out sodium salt from the 3rd desulfurization wastewater, such as Fig. 1 Shown, in the embodiment of the present invention, which further includes:Enrichment facility 8;The import of enrichment facility 8 and the second filter 6 Outlet, first outlet and the inlet communication of crystallization apparatus 7.
Above-mentioned enrichment facility 8 may include disc tube reverse osmosis (dt-ro) device, mechanical steam recompression evaporator, multi-effect evaporator It is at least one.
For example, the enrichment facility 8 in the embodiment of the present invention includes disc tube reverse osmosis (dt-ro) device, the machinery sequentially connected Formula vapor recompression evaporator.Wherein, through disc tube reverse osmosis (dt-ro) device processing after desulfurization wastewater in solid salt mass fraction For 6%~8%, the mass fraction of solid salt can in the desulfurization wastewater after the processing of mechanical steam recompression evaporator again afterwards To 20%~25%.
As described above, the 3rd desulfurization wastewater after heavy-metal ion removal predominantly mixes sodium salt solution, the present invention is implemented Example, can be to the 3rd desulfurization wastewater before the 3rd desulfurization wastewater enters to enrichment facility 702 in order to improve the utilization rate to sodium salt In mixing salt solution carry out a point salt treatment, therefore as shown in Figure 1, in the embodiment of the present invention, which further includes:Nanofiltration fills 9 are put, for carrying out a point salt treatment to desulfurization wastewater;The outlet of the import of nanofiltration device 9 and the second filter 6, outlet with The inlet communication of enrichment facility 8.
In use, since the second filter 6 is used to filter the two-stage precipitation thing in de- trithio waste water, need to be to the second mistake The filter core of filter 6 is cleaned, and the filter hole of the filter core of the second filter 6 is blocked to avoid weight two-stage precipitation thing.Therefore, as schemed Shown in 1, which further includes:Backwash water tank 10, for cleaning the second filter 6;The import and concentration of backwash water tank 10 The second outlet connection of device 8, outlet and the second inlet communication of the second filter 6.
When the second filter 6 includes grade one filter 601 and secondary filter 602, the outlet difference of backwash water tank 10 With grade one filter 601 and the second inlet communication of secondary filter 602.
It should be noted that the distilled water after the concentrated device 8 of three-level desulfurization wastewater is handled also can be by the of enrichment facility 8 Two outlet discharges.
In order to efficiently separate the two-stage precipitation thing in three-level desulfurization wastewater, as shown in Figure 1, in the embodiment of the present invention, the Tow filtrator 6 includes:Grade one filter 601, secondary filter 602;The import of grade one filter 601 and heavy metal collector 5 outlet, first outlet and the inlet communication of secondary filter 602;The first outlet of secondary filter 602 is filled with nanofiltration Put 9 inlet communication.
It should be noted that the particle diameter that above-mentioned secondary filter 602 is filtered is less than above-mentioned grade one filter 601.
The embodiment of the present invention is in order to further be effectively separated the heavy metal ion in desulfurization wastewater, by-pass filtration Device 601 is double medium filters.
It is effective three times in order to be carried out to the heavy metal ion in desulfurization wastewater based on the structure of above-mentioned second filter 6 Separate, in the embodiment of the present invention, the filter medium of grade one filter 601 includes the anthracite and quartz sand of stacking;Secondary filtration The filter medium of device 602 is nanometer membrane filter.
Wherein, a diameter of 1.2mm~1.8mm of filter hole corresponding to above-mentioned anthracite, the filter hole corresponding to quartz sand A diameter of 0.5mm~1.0mm, a diameter of 10nm~15nm of filter hole of nanometer membrane filter.
As described above, clarifying basin 2 is mainly used for precipitating and separates the suspended matter in desulfurization wastewater.Wherein, desulfurization wastewater is not PH before being handled is 5~7, and the component of suspended matter is mainly gypsum, and content is about 10000-18000mg/L.When de- Sulphur waste water is entered in clarifying basin 2, and coagulant, flocculation aid are added into clarifying basin 2, is gathered the suspended matter in desulfurization wastewater Collect, grow up, and sink down into the bottom of clarifying basin 2, and the supernatant of clarifying basin 2 is entered in reactor 3.
It should be noted that above-mentioned coagulant, flocculation aid cannot make calcium ions and magnesium ions in desulfurization wastewater, heavy metal ion with Compound or the form of simple substance are assembled.
In order to be recycled to the suspended matter in desulfurization wastewater, in the embodiment of the present invention, as shown in Figure 1, at this Reason system further includes:The first dewaterer 11 that import is connected with the second outlet of clarifying basin 2, for drying suspended matter.It is to be desulfurization Suspended matter in waste water can be used as construction material or cement retarder after the drying of the first dewaterer 11.
As described above, reactor 3 is mainly used for carrying out the calcium ions and magnesium ions in first grade desulfurizing waste water in the form of compound Precipitation.Wherein, the PH of the desulfurization wastewater gone after oil removal does not change, and the concentration of the calcium ions and magnesium ions in desulfurization wastewater is 1000-5000ppm。
The embodiment of the present invention adds in order to be recycled to the calcium ions and magnesium ions in desulfurization wastewater in reactor 3 Phosphate, ammonium salt, sodium hydroxide, make the calcium ions and magnesium ions in desulfurization wastewater generate ammonium magnesium phosphate, calcium phosphate respectively.Due to magnesium phosphate Ammonium, calcium phosphate be phosphate fertilizer main component, therefore processing system provided in an embodiment of the present invention can by the calcium and magnesium in desulfurization wastewater from The ammonium magnesium phosphate compared with high added value, calcium phosphate is made in son, and then can reduce desulfurization wastewater processing operating cost.
It should be noted that, although usually added with sodium hydroxide with by the pH value tune in desulfurization wastewater in above-mentioned reactor 3 It is whole to 7~9 so that the part heavy metal ion in desulfurization wastewater is precipitated in the form of hydroxide, but above-mentioned reaction Device 3 has solution circulatory function, and ammonium magnesium phosphate and calcium phosphate crystal can be made constantly to grow up, so can obtain a diameter of 0.5mm with On ammonium magnesium phosphate and calcium phosphate crystal, since the concentration of heavy metal ion in desulfurization wastewater is generally less than 5mg/L, though produce Precipitation, metallic particles is also smaller, usually below 1 micron, therefore (can may be configured as inclined plate to filter by first filter 4 Device) ammonium magnesium phosphate in desulfurization wastewater and calcium phosphate are effectively separated, and tiny metal oxyhydroxide enters a huge sum of money Belong in collection device 5.
In order to be recycled to the calcium ions and magnesium ions in desulfurization wastewater, in the embodiment of the present invention, as shown in Figure 1, should Processing system further includes:The second dewaterer 10 that import is connected with the second outlet of first filter 4, for drying level-one precipitation Thing., can be as the raw material of phosphate fertilizer after level-one sediment after the drying of the second dewaterer 12.
As described above, heavy metal collector 5 is used to precipitate the heavy metal ion in desulfurization wastewater.When two-grade desulfurizing waste water When entering in heavy metal collector 5, the pH value of desulfurization wastewater is adjusted to 10~12, and adds organic sulfur, flocculant, will Heavy metal ion in desulfurization wastewater chemically reacts, and is assembled, grown up to, and ultimately produces the heavy metal chemical combination of bulky grain Thing.
In order to be effectively treated to the heavy metal ion in desulfurization wastewater, in the embodiment of the present invention, as shown in Figure 1, The processing system further includes:The 3rd dewaterer 13 that import is connected with the second outlet of grade one filter 601, for drying nest Two-stage precipitation thing;The 4th dewaterer 14 that import is connected with the second outlet of secondary filter 602, for drying remainder Two-stage precipitation thing.
Supernatant in above-mentioned first dewaterer 11 can be flowed into clarifying basin 2, and then can successively be precipitated and be separated supernatant Suspended matter, calcium ions and magnesium ions in liquid, heavy metal ion;And above-mentioned second dewaterer 12, above-mentioned 3rd dewaterer the 13, the 4th are dehydrated Supernatant in machine 14 can be flowed into reactor 3, and then is precipitated and separated the calcium ions and magnesium ions in supernatant, heavy metal ion.
Above-mentioned all optional technical solutions, can use any combination to form the alternative embodiment of the disclosure, herein no longer Repeat one by one.
The foregoing is merely presently preferred embodiments of the present invention, the protection domain being not intended to limit the invention is all in this hair Within bright spirit and principle, any modification, equivalent replacement, improvement and so on, should be included in protection scope of the present invention Within.

Claims (9)

1. a kind of processing system of thermal power plant desulfurization wastewater, it is characterised in that the processing system includes:
Wastewater collection pond (1), for collecting desulfurization wastewater;
Import and the clarifying basin (2) of the outlet of the wastewater collection pond (1), for precipitating and separating in the desulfurization wastewater Suspended matter;
The reactor (3) that import is connected with the first outlet of the clarifying basin (2), for precipitating the calcium and magnesium in the desulfurization wastewater Ion, obtains the level-one sediment containing the calcium ions and magnesium ions;
Import and the first filter (4) of the outlet of the reactor (3), for the level-one sediment to be given up with desulfurization Water separates;
The heavy metal collector (5) that import is connected with the first outlet of the first filter (4), for precipitating the desulfurization Heavy metal ion in waste water, obtains the two-stage precipitation thing containing the heavy metal ion;
First import and the second filter (6) of the outlet of the heavy metal collector (5), for the two level to be sunk Starch is separated with desulfurization wastewater.
2. processing system according to claim 1, it is characterised in that the processing system further includes:Import and described the The crystallization apparatus (7) of the outlet of tow filtrator (6).
3. processing system according to claim 2, it is characterised in that the processing system further includes:Enrichment facility (8);
The import of the enrichment facility (8) and the outlet of second filter (6), first outlet and the crystallization apparatus (7) inlet communication.
4. processing system according to claim 3, it is characterised in that the processing system further includes:Nanofiltration device (9), For carrying out a point salt treatment to the desulfurization wastewater;
The import of the nanofiltration device (9) and the outlet of second filter (6), outlet and the enrichment facility (8) Inlet communication.
5. processing system according to claim 3, it is characterised in that the processing system further includes:Backwash water tank (10), For cleaning second filter (6);
The import of the backwash water tank (10) is connected with the second outlet of the enrichment facility (8), outlet and the described second filtering Second inlet communication of device (6).
6. processing system according to claim 4, it is characterised in that second filter (6) includes:Grade one filter (601), secondary filter (602);
First import of the grade one filter (601) and the outlet of the heavy metal collector (5), first outlet with First inlet communication of the secondary filter (602);
The first outlet of the secondary filter (602) and the inlet communication of the nanofiltration device (9).
7. processing system according to claim 6, it is characterised in that the grade one filter (601) is double media filtrations Device.
8. processing system according to claim 7, it is characterised in that the filter medium bag of the grade one filter (601) Include the anthracite and quartz sand of stacking;
The filter medium of the secondary filter (602) is nanometer membrane filter.
9. processing system according to claim 6, it is characterised in that the processing system further includes:
The first dewaterer (11) that import is connected with the second outlet of the clarifying basin (2), for drying the suspended matter;
The second dewaterer (12) that import is connected with the second outlet of the first filter (4), sinks for drying the level-one Starch;
The 3rd dewaterer (13) that import is connected with the second outlet of the grade one filter (601), for described in drying nest Two-stage precipitation thing;
The 4th dewaterer (14) that import is connected with the second outlet of the secondary filter (602), for drying remainder The two-stage precipitation thing.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2137722C1 (en) * 1998-07-13 1999-09-20 Московский энергетический институт (Технический университет) Method for thermochemical desalting of natural and waste waters
CN105523677A (en) * 2016-01-27 2016-04-27 成都锐思环保技术股份有限公司 Treatment system capable of realizing zero discharge of desulfurization wastewater
CN105923822A (en) * 2016-05-31 2016-09-07 江苏京源环保股份有限公司 Mud and salt separation zero-discharge process of desulfurization wastewater
CN106007131A (en) * 2016-03-30 2016-10-12 北京朗新明环保科技有限公司南京分公司 Desulfurization wastewater microfiltration-nanofiltration-reverse osmosis membrane combined processing system and technology
CN106430794A (en) * 2016-12-20 2017-02-22 大唐国际化工技术研究院有限公司 Resourceful treatment method and treatment system for desulfuration wastewater
CN206188558U (en) * 2016-11-02 2017-05-24 盛发环保科技(厦门)有限公司 Desulphurization waste water treatment system based on multistage fluidized bed crystallization

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2137722C1 (en) * 1998-07-13 1999-09-20 Московский энергетический институт (Технический университет) Method for thermochemical desalting of natural and waste waters
CN105523677A (en) * 2016-01-27 2016-04-27 成都锐思环保技术股份有限公司 Treatment system capable of realizing zero discharge of desulfurization wastewater
CN106007131A (en) * 2016-03-30 2016-10-12 北京朗新明环保科技有限公司南京分公司 Desulfurization wastewater microfiltration-nanofiltration-reverse osmosis membrane combined processing system and technology
CN105923822A (en) * 2016-05-31 2016-09-07 江苏京源环保股份有限公司 Mud and salt separation zero-discharge process of desulfurization wastewater
CN206188558U (en) * 2016-11-02 2017-05-24 盛发环保科技(厦门)有限公司 Desulphurization waste water treatment system based on multistage fluidized bed crystallization
CN106430794A (en) * 2016-12-20 2017-02-22 大唐国际化工技术研究院有限公司 Resourceful treatment method and treatment system for desulfuration wastewater

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