CN106045109A - Treatment method and equipment of high-salinity waste water - Google Patents
Treatment method and equipment of high-salinity waste water Download PDFInfo
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- CN106045109A CN106045109A CN201610511892.0A CN201610511892A CN106045109A CN 106045109 A CN106045109 A CN 106045109A CN 201610511892 A CN201610511892 A CN 201610511892A CN 106045109 A CN106045109 A CN 106045109A
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- 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
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- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- 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
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a treatment method of high-salinity waste water, comprising the following steps: S100: primary softening treatment of waste water; S200: secondary softening treatment of waste water; and subsequent thickening treatment of waste water. The equipment using the method comprises a primary treater, a secondary treater and a flocculation reactor, wherein the primary treater is connected with the secondary treater through a water delivery pipe A; the secondary treater is connected with a water inlet pipe of the flocculation reactor through a water delivery pipe B; and a bottom separation zone, a strong mixing zone, a flocculation crystallizing zone, a core impact zone, a suspension mud residue zone and a bleeding zone are arranged in the flocculation reactor. The method disclosed by the invention is simple and easy to realize, high in efficiency and low in energy consumption; adoption of the method avoids environmental pollution, plays a positive role in improving environment, saves production cost and has remarkable environmental and social benefits; and the equipment disclosed by the invention has the advantages of high operating efficiency, low cost and low energy consumption.
Description
Technical field
The present invention relates to processing method and the equipment of a kind of high slat-containing wastewater, belong to high-salt wastewater process field.
Background technology
Industrial wastewater refers to waste water, sewage and the waste liquid produced in industrial processes, wherein contains the work outflowed with water
Industry produces the pollutant produced in materials, intermediate product and product and production process.Along with the development of industry, waste water
Kind and quantity rapidly increase, and the pollution to water body is the most extensive and serious, threatens the health and safety of the mankind, hence for
How to administer industrial wastewater and then become the protection mankind and the major issue of natural environment.
Industrial Wastewater Treatment is considerably complicated, especially the process of high slat-containing wastewater, and high slat-containing wastewater refers to total content salt matter
The waste water of amount mark at least 1%, this waste water contains many kinds of substance, and the way of production is extensive, and the water yield increases the most year by year.High saliferous gives up
Can produce the precipitate such as mud, residue in water treatment procedure, these recycling precipitate being utilized can be as the desulfurizing agent of power plant
Use.But, the process of high slat-containing wastewater puts into huge, is often difficult to accomplish the efficient process to waste water, thus directly affects
To surrounding enviroment and Business Economic Benefit.Therefore, study a kind of method that can efficiently process high slat-containing wastewater, particularly important.
Summary of the invention
It is an object of the invention to, it is provided that the processing method of a kind of high slat-containing wastewater and equipment, this processing method can be right
In waste water, liquid and salt component carry out separation and efficiently separate, and by the recycling precipitate produced in processing procedure to recycle；
This equipment is capable of the efficient process of high slat-containing wastewater.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that: the processing method of a kind of high slat-containing wastewater,
Comprise the following steps: S100: waste water one-level sofening treatment；S200: waste water secondary softening processes；S300: at waste water subsequent concentration
Reason.
The processing method of aforesaid a kind of high slat-containing wastewater, described waste water one-level sofening treatment technique includes, to high saliferous
Adding polymeric iron in waste water and calcium hydroxide reacts, the mixing forming magnesium hydrate precipitate and magnesium hydroxide and silicon ion is sunk
Form sediment.
The processing method of aforesaid a kind of high slat-containing wastewater, described waste water secondary softening processes technique and includes, to through useless
The high slat-containing wastewater of water one-level sofening treatment technique adds sodium carbonate react, separate out calcium carbonate.
The processing method of aforesaid a kind of high slat-containing wastewater, described waste water subsequent concentration processes technique and comprises the following steps:
S300-1: the waste water after two-stage sofening treatment is passed through flocculation reactor and converges with recirculated water, forms mixing water；S300-
2: improve the flow velocity of mixing water in the strength mixed zone of flocculation reactor, form high flow rate mixing water；S300-3: in flocculation reaction
In device flocculation crystal region reduce high flow rate mixing water flow velocity, reduce high flow rate mixing water flow velocity so that in waste water from
Son is sufficiently mixed with the body refuse in recirculated water；S300-4: the suspension body refuse district in flocculation reactor reduces mixing water further
Flow velocity, formed low flow velocity mixing water；S300-5: after being separated by body refuse, mixing water discharges flocculation reactor by bleed district.
The processing method of aforesaid a kind of high slat-containing wastewater, in described step S300, waste water is passed through flocculation reactor water conservancy diversion
The arrival end of cylinder, and converge with by the supplied recirculated water of circulating pump, and waste water is along with the guide shell that is lifted into of recirculated water current
Strongly mixed zone, in strength mixed zone, waste water and recirculated water form high flow rate mixing water, now the G-value of mixing water be 700～
1000s-1, is 0.8s～1.2s in the time of staying of strength mixed zone.
The processing method of aforesaid a kind of high slat-containing wastewater, in described step S300, the mixing water flow velocity of flocculation crystal region
For the 1/25 of high flow rate mixing water, the ion in mixing water is sufficiently mixed with body refuse, and crystallization forms graininess body refuse, at suspension mud
The bulky grain body refuse of slag district crystallization sinks down into the Disengagement zone, bottom of flocculation reactor, and little granule body refuse collides with bulky grain body refuse,
Forming suspension body refuse granule, suspension body refuse granule constantly adsorbs the little granule body refuse in mixing water, then is formed under bulky grain body refuse
Heavy.
The processing method of aforesaid a kind of high slat-containing wastewater, in described step S300, the mixing water after body refuse separation is successively
By the clear water stratum disjunctum in bleed district, inclined tube stratum disjunctum and top clear water floor, in inclined tube stratum disjunctum by through step S300-4
The current Reynolds number of low flow velocity mixing water is reduced to less than 100, discharges flocculation reactor by the outlet of top clear water layer.
Realize a kind of equipment of above-mentioned preceding method, including coagulation device, secondary processor and flocculation reactor, one-level
Processor is connected with secondary processor by A water-supply-pipe, and secondary processor is connected by the water inlet pipe of B water-supply-pipe with flocculation reactor
Connect, in flocculation reactor, be provided with bottom Disengagement zone, strongly mixed zone, flocculation crystal region, core crash district, suspension body refuse district and analysis
Pool, bleed district is arranged at the top in suspension body refuse district, and suspension body refuse district is arranged at the top in core crash district, core crash district
Being arranged at the top of flocculation crystal region, flocculation crystal region is located at the top of strength mixed zone, and strongly mixed zone sets and separates with bottom
The top in district, the clear water stratum disjunctum in bleed district is arranged at the lower section of inclined tube stratum disjunctum, and inclined tube stratum disjunctum is arranged at top clear water layer
Lower section.Disengagement zone, bottom is mainly in order to collect bulky grain body refuse, and the bulky grain body refuse of collection can obtain after mechanical dehydration
To calcium carbonate mud cake.The waste water that is passed through in Disengagement zone, bottom and recirculated water upwards, the mixing water of formation is with on current upwards
Rise, and the bulky grain body refuse that the diameter carried in waste water and recirculated water is more than 2mm be due to action of gravity, it is impossible to be carried upwards,
So being precipitated to the bottommost of Disengagement zone, bottom, and the little granule body refuse carried in waste water and recirculated water can being carried upwards.
In aforementioned device, strength mixed zone, flocculation crystal region and core that described guide shell is located in flocculation reactor are touched
Hitting section, guide shell includes arrival end flooding port, is provided with deflector in guide shell, and arrival end is arranged at strength mixed zone
Lower section, flooding port is located at flocculation crystallization section；It is provided with body refuse between flocculation reactor and guide shell and falls district after rise.Guide shell
Deflector is inside set, mixing water lateral flow can be prevented, improve this high slat-containing wastewater and process the stability of technique.Body refuse is set
Fall district after rise, bulky grain body refuse can be made to fall district after rise from body refuse and be settled down to the Disengagement zone, bottom of flocculation reactor, and periodically divide from bottom
Bulky grain body refuse is collected from district.
Strongly mixed zone is positioned at the trunnion of guide shell, and the area of section at trunnion is less than the cross section of other section of guide shell
Area, the flow of inlet water of waste water and the flow of recirculated water quickly converge formation high flow rate mixing water herein.
Residing for flocculation crystal region, the diameter of section of guide shell pipeline section is more than the diameter of section at trunnion, and its area of section is larynx
25 times of tube section area, therefore after the high flow rate mixing water formed in strength mixed zone rises to flocculation crystal region with current, mixed
The flow velocity of Heshui is reduced to the 1/25 of high flow rate mixing water, thus flocculation crystal region be lowered in the mixing water of flow velocity various
Body refuse granule contained by ion and recirculated water sufficiently mixes, and gradually forms bulky grain body refuse.Dropped at flocculation crystal region
The time of staying of the mixing water of low flow velocity is 5～10 minutes, and G-value is 70～120s-1.
It is lowered the mixing water flooding port through guide shell of flow velocity, rises to the core crash district of flocculation reactor.
Now, the bulky grain body refuse formed, present downward trend；Do not formed oarse-grained body refuse continue absorption mixing water in from
Son or body refuse granule, so that it forms bulky grain body refuse further.
Be lowered the mixing water of flow velocity further up to suspension body refuse district time, the flocculation being positioned at due to suspension body refuse district
2 times of the be positioned at draft tube diameter in a diameter of flocculation sediment district of reactor so that be lowered the mixing water of flow velocity further by
Reducing flow velocity, for low flow velocity mixing water, upflow velocity is 3～5mm/s.And now, the bulky grain body refuse formed is due to mixed
The flow velocity of Heshui is reduced to 3～5mm/s, and under gravity, bulky grain body refuse returns from the body refuse that guide shell is peripheral along current
Settle in an area and be settled down to downwards Disengagement zone, bottom, do not form oarse-grained body refuse and rise with current and the bulky grain body refuse of not sedimentation in time
Collision, can form the suspension body refuse granule of certain diameter under the effect of gravity and current, and suspension body refuse granule now
Sedimentation velocity is equal to the current rate of climb of low flow velocity mixing water, thus body refuse and water are gradually disengaged, and are finally reached mud-water separation
Effect.
The purpose arranging clear water stratum disjunctum is to prevent graininess body refuse from rising to top clear water layer.Inclined tube stratum disjunctum is set
Purpose is the current Reynolds number for reducing low flow velocity mixing water further, it is ensured that the current of the low current mixing water of inclined tube stratum disjunctum
Reynolds number is less than 100, and separates the body refuse granule of non-Ex-all in water further.At top clear water layer, use peripheral weir
Mode, make separated go out body refuse mixing water current more steady.
In aforementioned device, described circulating pump is connected with flocculation reactor by circulation pipe, one end mouth of pipe of circulation pipe with lead
Flow cartridge connects, and the other end mouth of pipe is communicated in the suspension body refuse district of flocculation reactor.It is passed through in flocculation reactor by circulating pump
Recirculated water upwards, so that being passed through the waste water of flocculation reactor along with, on the current direction of recirculated water, the most constantly forming big
Grain body refuse, finally realizes mud-water separation.
Compared with prior art, the present invention can carry out separation to liquid in waste water and salt component and efficiently separate, and at general
During reason produce recycling precipitate to recycle, use two-stage soften pretreatment method eliminate silicon in waste water, magnesium,
Calcium plasma, and by flocculation reactor and built-in guide shell, the calcium carbonate that can produce in high efficiente callback wastewater treatment process
Body refuse, and realize the non-pollution discharge of waste water.The method of the present invention the most easily realizes, efficiency high, energy consumption is little, uses the present invention's
Method, not only avoid the pollution to environment, has positive role to improving environment, and has saved production cost, environment and society
Can benefit highly significant；The equipment of the present invention, operational efficiency is high, and low cost, energy consumption is little.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention；
Fig. 2 is a kind of equipment schematic diagram of the present invention.
Reference: 1-coagulation device, 2-secondary processor, 3-flocculation reactor, 4-A water-supply-pipe, 5-B water-supply-pipe,
6-water inlet pipe, Disengagement zone bottom 7-, 8-strength mixed zone, 9-flocculates crystal region, 10-core crash district, 11-suspension body refuse district,
12-bleed district, 13-arrival end, 14-flooding port, 15-circulating pump, 16-circulation pipe, 17-clear water stratum disjunctum, 18-inclined tube separates
Layer, 19-top clear water layer, 20-guide shell, 21-body refuse falls district after rise.
The present invention is further illustrated with detailed description of the invention below in conjunction with the accompanying drawings.
Detailed description of the invention
The embodiment of the present invention 1: the processing method of a kind of high slat-containing wastewater, comprises the following steps: S100: waste water one-level softens
Process；S200: waste water secondary softening processes；S300: waste water subsequent concentration processes.
Waste water one-level sofening treatment technique includes, adds polymeric iron and calcium hydroxide reacts in high slat-containing wastewater,
Form magnesium hydrate precipitate and magnesium hydroxide and the mixed precipitation of silicon ion.
Waste water secondary softening processes technique and includes, adds in the high slat-containing wastewater through waste water one-level sofening treatment technique
Sodium carbonate reacts, and separates out calcium carbonate.
Waste water subsequent concentration processes technique and comprises the following steps: the waste water after two-stage sofening treatment is passed through by S300-1
Flocculation reactor 3 converges with recirculated water, forms mixing water；S300-2 improves mixing water in the strength mixed zone 8 of flocculation reactor 3
Flow velocity, formed high flow rate mixing water；S300-3 flocculation crystal region 9 in flocculation reactor 3 reduces high flow rate mixing water
Flow velocity；S300-4 suspension body refuse district 11 in flocculation reactor 3 reduces the flow velocity of mixing water further, forms low flow velocity mixing
Water；After body refuse is separated by S300-5, mixing water discharges flocculation reactor 3 by bleed district 12.
The embodiment of the present invention 2: the processing method of a kind of high slat-containing wastewater, comprises the following steps: S100: waste water one-level softens
Process；S200: waste water secondary softening processes；S300: waste water subsequent concentration processes.
Waste water one-level sofening treatment technique includes, adds polymeric iron and calcium hydroxide reacts in high slat-containing wastewater,
Form magnesium hydrate precipitate and magnesium hydroxide and the mixed precipitation of silicon ion.
Waste water secondary softening processes technique and includes, adds in the high slat-containing wastewater through waste water one-level sofening treatment technique
Sodium carbonate reacts, and separates out calcium carbonate.
Waste water subsequent concentration processes technique and comprises the following steps: S300-1: led to by the waste water after two-stage sofening treatment
Enter flocculation reactor 3 to converge with recirculated water, form mixing water；S300-2: improve mixed in the strength mixed zone 8 of flocculation reactor 3
The flow velocity of Heshui, forms high flow rate mixing water；S300-3: the flocculation crystal region 9 in flocculation reactor 3 reduces high flow rate mixing
The flow velocity of water；S300-4: the suspension body refuse district 11 in flocculation reactor 3 reduces the flow velocity of mixing water further, forms low stream
Speed mixing water；S300-5: after being separated by body refuse, mixing water discharges flocculation reactor 3 by bleed district 12.
In step S300, waste water is passed through 20 arrival ends 13 of flocculation reactor 3 guide shell, and is supplied with by circulating pump 15
Recirculated water converges, and waste water is along with the strength mixed zone 8 being lifted into guide shell 20 of recirculated water current, in strength mixed zone 8
Waste water forms high flow rate mixing water with recirculated water, and now the G-value of high flow rate mixing water is 700～1000s-1, in strength mixed zone
The time of staying of 8 is 0.8s～1.2s.Mixing water flow velocity is high flow rate mixing water the 1/25 of flocculation crystal region 9, in mixing water
Ion be sufficiently mixed with body refuse, crystallization formed graininess body refuse, suspension body refuse district 11 crystallization bulky grain body refuse sink down into
The Disengagement zone, bottom 7 of flocculation reactor 3, little granule body refuse collides with bulky grain body refuse, forms suspension body refuse granule, suspension body refuse
Granule constantly adsorbs the little granule body refuse in mixing water, then forms bulky grain body refuse.
The embodiment of the present invention 3: the processing method of a kind of high slat-containing wastewater, comprises the following steps: S100: waste water one-level softens
Process；S200: waste water secondary softening processes；S300: waste water subsequent concentration processes.
Waste water one-level sofening treatment technique includes, adds polymeric iron and calcium hydroxide reacts in high slat-containing wastewater,
Form magnesium hydrate precipitate and magnesium hydroxide and the mixed precipitation of silicon ion.
Waste water secondary softening processes technique and includes, adds in the high slat-containing wastewater through waste water one-level sofening treatment technique
Sodium carbonate reacts, and separates out calcium carbonate.
Waste water subsequent concentration processes technique and comprises the following steps: S300-1: led to by the waste water after two-stage sofening treatment
Enter flocculation reactor 3 to converge with recirculated water, form mixing water；S300-2: improve mixed in the strength mixed zone 8 of flocculation reactor 3
The flow velocity of Heshui, forms high flow rate mixing water；S300-3: the flocculation crystal region 9 in flocculation reactor 3 reduces high flow rate mixing
The flow velocity of water；S300-4: the suspension body refuse district 11 in flocculation reactor 3 reduces the flow velocity of mixing water further, forms low stream
Speed mixing water；S300-5: after being separated by body refuse, mixing water discharges flocculation reactor 3 by bleed district 12.
In step S300, waste water is passed through the arrival end 13 of flocculation reactor 3 guide shell 20, and is supplied with by circulating pump 15
Recirculated water converges, and waste water is along with the strength mixed zone 8 being lifted into guide shell 20 of recirculated water current, in strength mixed zone 8
Waste water forms high flow rate mixing water with recirculated water, and now the G-value of high flow rate mixing water is 700～1000s-1, in strength mixed zone
The time of staying of 8 is 0.8s～1.2s.Mixing water flow velocity is high flow rate mixing water the 1/25 of flocculation crystal region 9, in mixing water
Ion be sufficiently mixed with body refuse, crystallization formed graininess body refuse, suspension body refuse district 11 crystallization bulky grain body refuse sink down into
The Disengagement zone, bottom 7 of flocculation reactor 3, little granule body refuse collides with bulky grain body refuse, forms suspension body refuse granule, suspension body refuse
Granule constantly adsorbs the little granule body refuse in mixing water, then forms bulky grain body refuse.Mixing water after body refuse separation is successively
By the clear water stratum disjunctum 17 in bleed district 12, inclined tube stratum disjunctum 18 and top clear water floor 19, will be through step in inclined tube stratum disjunctum 18
The current Reynolds number of the low flow velocity mixing water of rapid S300-4 is reduced to less than 100, is discharged by the outlet of top clear water layer 19
Flocculation reactor 3.
The embodiment of the present invention 4: the embodiment of the present invention 4 is to realize the process side of a kind of high slat-containing wastewater described in embodiment 1～3
A kind of equipment that method is used, including coagulation device 1, secondary processor 2 and flocculation reactor 3, coagulation device 1 passes through A
Water-supply-pipe 4 is connected with secondary processor 2, and secondary processor 2 is connected with the water inlet pipe 6 of flocculation reactor 3 by B water-supply-pipe 5, wadding
Bottom Disengagement zone 7, strongly mixed zone 8, flocculation crystal region 9, core crash district 10, suspension body refuse district 11 it is provided with in solidifying reactor 3
With bleed district 12, bleed district 12 is arranged at the top in suspension body refuse district 11, and suspension body refuse district 11 is arranged at core crash district 10
Top, core crash district 10 is arranged at the top of flocculation crystal region 9, and flocculation crystal region 9 is located at the top of strength mixed zone 8, by force
Power mixed zone 8 sets and the top of Disengagement zone, bottom 7, and the clear water stratum disjunctum 17 in bleed district 12 is arranged at inclined tube stratum disjunctum 18 times
Side, inclined tube stratum disjunctum 18 is arranged at the lower section of top clear water layer 19.
Strength mixed zone 8, flocculation crystal region 9 and 10 sections of the core crash district that guide shell 20 is located in flocculation reactor 3, leads
Flow cartridge 20 includes arrival end 13 and flooding port 14, is provided with deflector (not marking in figure) in guide shell 20, and arrival end 13 sets
Being placed in the lower section of strength mixed zone 8, flooding port 14 is located at flocculation crystal region 9 sections；Between flocculation reactor 3 and guide shell 20
It is provided with body refuse and falls district 21 after rise.Body refuse is set and falls district 21 after rise, bulky grain body refuse can be made to fall district 21 after rise from body refuse and be settled down to flocculation instead
Answer the Disengagement zone, bottom 7 of device 3, and periodically collect bulky grain body refuse from Disengagement zone, bottom 7.
Circulating pump 15 is connected with flocculation reactor 3 by circulation pipe 16, and one end mouth of pipe of circulation pipe 16 is with guide shell 20 even
Logical, the other end mouth of pipe is communicated in the suspension body refuse district 11 of flocculation reactor 3.
Embodiments of the invention 5: the embodiment of the present invention 5 is the optimum embodiment realizing the inventive method, in this embodiment
The salinity of middle high slat-containing wastewater is 30000～40000mg/L, containing a large amount of calcium ions, strontium ion, magnesium ion, silicon ion, chlorine
Root and sulfate radical, wherein the concentration of sulfate radical is 1500～2000mg/L, and the concentration of silicon dioxide is 20～30mg/L.
First, by high slat-containing wastewater through step S100 waste water one-level sofening treatment, high slat-containing wastewater is passed through coagulation
Device 1, and addition polymeric iron and calcium hydroxide carry out chemical reaction in the high slat-containing wastewater being passed through to coagulation device 1, main
Magnesium hydrate precipitate to be formed and magnesium hydroxide and the mixed precipitation of silicon ion.Coagulation device 1 adds the change of calcium hydroxide
Reaction equation is as follows: MgCl2+Ca(OH)2==Mg (OH)2↓+CaCl2；Ca(HCO3)2+Ca(OH)2==2CaCO3↓+
2H2O；SiO2+3Mg(OH)2==3MgO 2SiO2·2H2O↓+H2O；MgSO4+Ca(OH)2==Mg (OH)2↓+CaSO4；
Substantial amounts of calcium ion is created through above-mentioned reaction, and magnesium ion and other hydroxides metal ion in waste water
The most precipitated, now containing substantial amounts of calcium ion, sodium ion, chloride ion and sulfate ion in waste water.
Then, carry out step S200 waste water secondary softening and process, will lead to through the high slat-containing wastewater of waste water one-level sofening treatment
Enter secondary processor 2, and be added thereto to sodium carbonate and carry out chemical reaction, primarily form precipitation of calcium carbonate.In secondary processor 2
The chemical equation adding sodium carbonate is as follows:
CaSO4+Na2CO3==CaCO3↓+Na2SO4；CaCl2+Na2CO3==CaCO3↓+2NaCl。
The precipitation of calcium carbonate that this technical process is formed, can obtain calcium carbonate mud cake after using mechanical dehydration, and calcium carbonate can
To use as power plant desulfurization absorbent, dominant response is as follows:
CaCO3+SO2+H2O==CaSO3+H2CO3；2CaCO3+2SO2+2H2O+O2==CaSO4+2H2CO3；H2CO3==
CO2↑+H2O。
Secondly, carry out S300 waste water subsequent concentration to process.
Waste water subsequent concentration processes technique and includes step S300-1: the waste water after two-stage sofening treatment is passed through flocculation
Reactor 3 converges with recirculated water, forms mixing water.Will be after waste water one-level sofening treatment and waste water secondary softening process technique
Waste water be passed through the arrival end 13 of flocculation reactor 3 guide shell 20, and converge with the recirculated water upwards being passed through by circulating pump 15
Close, form mixing water, and rise with current upwards, and the bulky grain mud that the diameter carried in waste water and recirculated water is more than 2mm
Slag is due to action of gravity, it is impossible to be carried upwards, so being precipitated to the bottommost of Disengagement zone 7, bottom, and in waste water and recirculated water
The little granule body refuse carried can be carried upwards.
Waste water subsequent concentration processes technique and also includes step S300-2: improve mixed in the strength mixed zone 8 of flocculation reactor 3
The flow velocity of Heshui, forms high flow rate mixing water.Waste water is along with the strength mixed zone being lifted into guide shell 20 of recirculated water current
8, owing to strength mixed zone 8 is positioned at the trunnion of guide shell 20, and the area of section at trunnion is less than other section of guide shell 20
Area of section, thus after waste water and recirculated water quickly converge herein, just form high flow rate mixing water.Now, high flow rate mixing
The G-value of water is 700～1000s-1, and is 0.8s～1.2s in the time of staying of strength mixed zone 8.
Waste water subsequent concentration processes technique and farther includes step S300-3: the flocculation crystal region 9 in flocculation reactor 3
Reduce the flow velocity of high flow rate mixing water.Residing for flocculation crystal region 9, the diameter of section of the cylinder section of guide shell 20 is more than guide shell 20 larynx
Diameter of section at pipe, and its area of section is 25 times of area of section at trunnion, therefore the high flow rate formed in strength mixed zone 8
After mixing water rises to flocculation crystal region 9 with current, the flow velocity of mixing water is reduced to the 1/25 of high flow rate mixing water, thus at wadding
Condense contained body refuse granule in the various ions that are lowered in the mixing water of flow velocity of crystalline region 9 and recirculated water sufficiently to mix,
Gradually fouling becomes bulky grain body refuse.It is 5～10 minutes in the time of staying of flocculation crystal region 9 mixing water that is lowered flow velocity, and G
Value is 70～120s-1.It is lowered the mixing water flooding port 14 through guide shell 20 of flow velocity, rises to flocculation reactor 3
Core crash district 10.Now, the bulky grain body refuse formed, present downward trend；Do not form oarse-grained body refuse to continue to inhale
Ion in attached mixing water or body refuse granule, so that its further fouling forms bulky grain body refuse.
Waste water subsequent concentration processes technique and still further comprises step S300-4: the suspension body refuse in flocculation reactor 3
District 11 reduces the flow velocity of mixing water further, forms low flow velocity mixing water.The mixing water being lowered flow velocity is further up to outstanding
During mud scum slag district 11, due to the be positioned at water conservancy diversion in a diameter of flocculation sediment district of the flocculation reactor 3 that suspension body refuse district 11 is positioned at
2 times of cylinder 20 diameters so that the mixing water being lowered flow velocity is lowered flow velocity further, becomes low flow velocity mixing water, it rises
Flow velocity is 3～5mm/s.And now, the bulky grain body refuse formed is reduced to 3～5mm/s due to the flow velocity of mixing water, at weight
Under power effect, bulky grain body refuse falls district 21 after rise along the current body refuse from guide shell 20 periphery and is settled down to downwards Disengagement zone 7, bottom,
Do not form oarse-grained body refuse to rise with current and the bulky grain body refuse collision of not sedimentation in time, under the effect of gravity and current
The suspension body refuse granule of certain diameter can be formed, and the sedimentation velocity of suspension body refuse granule now is equal to low flow velocity mixing water
The current rate of climb, suspension body refuse granule constantly adsorbs the little granule body refuse in mixing water, then forms bulky grain body refuse, from
And body refuse and water are gradually disengaged, it is finally reached the effect of mud-water separation.
Waste water subsequent concentration processes technique and includes final step S300-5: after being separated by body refuse, mixing water is by bleed district 12
Discharge flocculation reactor 3.Mixing water after body refuse separates passes sequentially through the clear water stratum disjunctum 17 in bleed district 12, inclined tube stratum disjunctum 18
With top clear water layer 19, can prevent graininess body refuse from rising to top clear water layer 19 by arranging clear water stratum disjunctum 17.At inclined tube
Stratum disjunctum 18 reduces the current Reynolds number of low flow velocity mixing water further, it is ensured that the water of the low current mixing water of inclined tube stratum disjunctum 18
Stream Reynolds number is less than 100, and separates the body refuse granule of non-Ex-all in water further.At top clear water layer 19, periphery is used to go out
The mode of mill weir, make separated go out body refuse mixing water current more steady, and discharged by the outlet of top clear water layer 19
Flocculation reactor 3.
Used in the processing method of above-mentioned high slat-containing wastewater, equipment includes coagulation device 1, secondary processor 2 and flocculation
Reactor 3, coagulation device 1 is connected with secondary processor 2 by A water-supply-pipe 4, and secondary processor 2 is by B water-supply-pipe 5 and wadding
The water inlet pipe 6 of solidifying reactor 3 connects, be provided with in flocculation reactor 3 bottom Disengagement zone 7, strongly mixed zone 8, flocculation crystal region 9,
Core crash district 10, suspension body refuse district 11 and bleed district 12, bleed district 12 is arranged at the top in suspension body refuse district 11, suspension body refuse
District 11 is arranged at the top in core crash district 10, and core crash district 10 is arranged at the top of flocculation crystal region 9, and flocculate crystal region 9
Being located at the top of strength mixed zone 8, strongly mixed zone 8 sets and the top of Disengagement zone, bottom 7, the clear water stratum disjunctum 17 in bleed district 12
Being arranged at the lower section of inclined tube stratum disjunctum 18, inclined tube stratum disjunctum 18 is arranged at the lower section of top clear water layer 19.Guide shell 20 is located at wadding
Strength mixed zone 8, flocculation crystal region 9 and 10 sections of core crash district in solidifying reactor 3, guide shell 20 includes arrival end 13 and expands
Dissipating port 14, arrival end 13 is arranged at the lower section of strength mixed zone 8, and flooding port 14 is located at flocculation crystal region 9 sections.Guide shell
It is provided with deflector in 20, mixing water lateral flow can be prevented, improve this high slat-containing wastewater and process the stability of technique.Water conservancy diversion
Being provided with body refuse between cylinder 20 and flocculation reactor 3 and fall district 21 after rise, bulky grain body refuse falls district 21 after rise from body refuse and is settled down to flocculation instead
Answer the Disengagement zone, bottom 7 of device 3, and periodically collect bulky grain body refuse from Disengagement zone, bottom 7.Circulating pump 15 is by circulation pipe 16 and wadding
Solidifying reactor 3 connects, and one end mouth of pipe of circulation pipe 16 connects with guide shell 20, and the other end mouth of pipe is communicated in flocculation reactor 3
Suspension body refuse district 11.
Claims (10)
1. the processing method of a high slat-containing wastewater, it is characterised in that comprise the following steps:
S100: waste water one-level sofening treatment；
S200: waste water secondary softening processes；
S300: waste water subsequent concentration processes.
The processing method of a kind of high slat-containing wastewater the most according to claim 1, it is characterised in that described waste water one-level softens
Process technique includes, adds polymeric iron and calcium hydroxide reacts in high slat-containing wastewater, forms magnesium hydrate precipitate and hydrogen
Magnesium oxide and the mixed precipitation of silicon ion.
The processing method of a kind of high slat-containing wastewater the most according to claim 2, it is characterised in that described waste water secondary softening
Process technique includes, adds sodium carbonate and reacts, separate out in the high slat-containing wastewater through waste water one-level sofening treatment technique
Calcium carbonate.
4. according to the processing method of a kind of high slat-containing wastewater described in Claims 2 or 3, it is characterised in that described waste water is follow-up
Concentration technique comprises the following steps:
S300-1: the waste water after two-stage sofening treatment is passed through flocculation reactor and converges with recirculated water, forms mixing water；
S300-2: improve the flow velocity of mixing water in the strength mixed zone of flocculation reactor, forms high flow rate mixing water；
S300-3: the flocculation crystal region in flocculation reactor reduces the flow velocity of high flow rate mixing water；
S300-4: the suspension body refuse district in flocculation reactor reduces the flow velocity of mixing water further, forms low flow velocity mixing water；
S300-5: after being separated by body refuse, mixing water discharges flocculation reactor by bleed district.
The processing method of a kind of high slat-containing wastewater the most according to claim 4, it is characterised in that in step S300, described
Waste water is passed through the arrival end of flocculation reactor guide shell, and converges with by the supplied recirculated water of circulating pump, and waste water is along with recirculated water
The strength mixed zone being lifted into guide shell of current, in strength mixed zone, waste water forms high flow rate mixing water with recirculated water,
Now the G-value of high flow rate mixing water is 700～1000s-1, is 0.8s～1.2s in the time of staying of strength mixed zone.
The processing method of a kind of high slat-containing wastewater the most according to claim 5, it is characterised in that in step S300, described
Mixing water flow velocity is high flow rate mixing water the 1/25 of flocculation crystal region, the ion in mixing water is sufficiently mixed with body refuse, crystallization
Forming graininess body refuse, the bulky grain body refuse in the crystallization of suspension body refuse district sinks down into the Disengagement zone, bottom of flocculation reactor, little
Grain body refuse collides with bulky grain body refuse, forms suspension body refuse granule, and suspension body refuse granule constantly adsorbs the little granule in mixing water
Body refuse, then form bulky grain body refuse.
7. according to the processing method of a kind of high slat-containing wastewater described in claim 5 or 6, it is characterised in that in step S300, institute
State the mixing water after body refuse separates and pass sequentially through the clear water stratum disjunctum in bleed district, inclined tube stratum disjunctum and top clear water floor, at inclined tube
The current Reynolds number of the low flow velocity mixing water through step S300-4 is reduced to less than 100 by stratum disjunctum, by top clear water layer
Outlet discharge flocculation reactor.
A kind of equipment that the processing method of a kind of high slat-containing wastewater the most according to claims 1 to 7 is used, its feature exists
In, including coagulation device (1), secondary processor (2) and flocculation reactor (3), described coagulation device (1) passes through A water delivery
Pipe (4) is connected with secondary processor (2), and secondary processor (2) is by the water inlet pipe of B water-supply-pipe (5) with flocculation reactor (3)
(6) connect, in described flocculation reactor (3), be provided with Disengagement zone, bottom (7), strongly mixed zone (8), flocculation crystal region (9), core
Impact zone (10), suspension body refuse district (11) and bleed district (12), bleed district (12) are arranged at the top in suspension body refuse district (11), outstanding
Mud scum slag district (11) is arranged at the top of core crash district (10), and core crash district (10) are arranged at the upper of flocculation crystal region (9)
Square, the top of strength mixed zone (8) is located in flocculation crystal region (9), and strongly mixed zone (8) set and the top of Disengagement zone, bottom (7),
The clear water stratum disjunctum (17) of described bleed district (12) is arranged at the lower section of inclined tube stratum disjunctum (18), and inclined tube stratum disjunctum (18) is arranged at
The lower section on top clear water layer (19).
A kind of equipment that the processing method of a kind of high slat-containing wastewater the most according to claim 8 is used, it is characterised in that
Strength mixed zone (8), flocculation crystal region (9) and the core crash district that described guide shell (20) is located in flocculation reactor (3)
(10) section, described guide shell (20) includes arrival end (13) and flooding port (14), and described guide shell is provided with water conservancy diversion in (20)
Plate, described arrival end (13) is arranged at the lower section of strength mixed zone (8), and described flooding port (14) is located at flocculation crystal region (9)
At Duan；It is provided with body refuse between described flocculation reactor (3) and guide shell (20) and falls district (21) after rise.
A kind of equipment that the processing method of a kind of high slat-containing wastewater the most according to claim 8 or claim 9 is used, its feature
Being, described circulating pump (15) is connected with flocculation reactor (3) by circulation pipe (16), one end mouth of pipe of described circulation pipe (16)
Connecting with guide shell (20), the other end mouth of pipe is communicated in the suspension body refuse district (11) of flocculation reactor (3).
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| CN201610511892.0A CN106045109A (en) | 2016-06-30 | 2016-06-30 | Treatment method and equipment of high-salinity waste water |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110790351A (en) * | 2019-12-10 | 2020-02-14 | 华电水务工程有限公司 | Calcium sulfate crystallization system for high-salinity wastewater and method for treating high-salinity wastewater |
| CN111995074A (en) * | 2020-08-25 | 2020-11-27 | 李玲 | Hard water softening device based on parent proliferation |
| CN112661276A (en) * | 2020-12-24 | 2021-04-16 | 山东山大华特环保科技有限公司 | Forced circulation softening and solid removal water treatment device and application thereof |
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| CN102001769A (en) * | 2010-11-23 | 2011-04-06 | 西安建筑科技大学 | Integrated water purifying and processing equipment |
| CN104276708A (en) * | 2014-09-24 | 2015-01-14 | 江苏京源环保股份有限公司 | Power plant wastewater zero-discharge treatment technique |
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| GB1501335A (en) * | 1975-03-19 | 1978-02-15 | Passavant Werke | Process for slow softening water |
| CN102001769A (en) * | 2010-11-23 | 2011-04-06 | 西安建筑科技大学 | Integrated water purifying and processing equipment |
| CN104276708A (en) * | 2014-09-24 | 2015-01-14 | 江苏京源环保股份有限公司 | Power plant wastewater zero-discharge treatment technique |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110790351A (en) * | 2019-12-10 | 2020-02-14 | 华电水务工程有限公司 | Calcium sulfate crystallization system for high-salinity wastewater and method for treating high-salinity wastewater |
| CN111995074A (en) * | 2020-08-25 | 2020-11-27 | 李玲 | Hard water softening device based on parent proliferation |
| CN112661276A (en) * | 2020-12-24 | 2021-04-16 | 山东山大华特环保科技有限公司 | Forced circulation softening and solid removal water treatment device and application thereof |
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