CN105152415B - Sinter wet-type magnesium method desulfurization purification Waste Water Treatment and technique - Google Patents
Sinter wet-type magnesium method desulfurization purification Waste Water Treatment and technique Download PDFInfo
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- CN105152415B CN105152415B CN201510649459.9A CN201510649459A CN105152415B CN 105152415 B CN105152415 B CN 105152415B CN 201510649459 A CN201510649459 A CN 201510649459A CN 105152415 B CN105152415 B CN 105152415B
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Abstract
The present invention disclose a kind of sintering wet-type magnesium method desulfurization purification Waste Water Treatment and technique, including wet electrical dust precipitator wastewater treatment subsystem to the flushing waste water processing of wet electrical dust precipitator, desulfurizing tower output flue gas is handled through mechanical dehydration after the obtained desulfurizing tower wastewater treatment subsystem of dehydration wastewater treatment；The wet electrical dust precipitator wastewater treatment subsystem, including the first wastewater equalization pond being sequentially communicated, first neutralization pond, first reaction tank, first flocculation basin, clarifier, first clear water reserviors, chlorine ion concentration detection means is provided with first clear water reserviors, first clear water reserviors are connected with the desulfurizing tower wastewater treatment subsystem, the desulfurizing tower wastewater treatment subsystem, including the second wastewater equalization pond being sequentially communicated, second neutralization pond, second reaction tank, second flocculation basin, clarifier, second clear water reserviors, and big particle diameter device for filtering impurities, small particle impurity and chlorion filter.
Description
Technical field
The present invention relates to environmental project and sewage treatment area, and in particular to one kind sintering wet-type magnesium method desulfurization purification waste water
Processing system and technique.
Background technology
Due to wet-type magnesium method desulfurization because operating cost is low, desulfuration efficiency is high, so by domestic iron and steel enterprises sintering or ball
The substantial amounts of engineer applied of group, while in order to reduce investment and operating cost, existing desulfurizer takes off without GGH (flue gas heat-exchange unit)
Only 50 DEG C or so of exhaust gas temperature after sulphur, although anti-corrosion has been carried out to chimney, but antiseptic effect is poor, chimney low temperature SO3Corrosion
Seriously.Contain a large amount of water smokes, sulfuric acid mist and fine aerosol in flue gas after desulfurization, these materials descend slowly and lightly near chimney, gas
Temperature is easily formed " dust-shower " or " small snowflake " when low." landscape " pollution is very serious.
Such phenomenon can effectively be removed using high-efficient wet-type electrostatic precipitator, and can effectively remove SO3, heavy metal,
Fine dust (PM2.5), fine drop etc., substantially reduce the opacity (turbidity) of flue gas, and smoke emissioning concentration also will be big
Big reduction, meets higher environmental requirement；In addition, SO3With a large amount of removals of water smoke, the anti-of chimney anticorrosion can be effectively reduced
Rotten grade, socialbenefit and economic effect is notable.
Wet electrical dust precipitator grows up on the basis of dry electric precipitation device.Because its efficiency of dust collection is high, applicable
In the processing containing high resistivity dust flue gas, and some pernicious gases can be purified, therefore, wet electrical dust precipitator in recent years
There is large development.Into the flue gas before wet electrical dust precipitator, it will be typically humidified in spray tower or entrance diffuser, and be allowed to
Saturation.Saturated flue gas enters after electric field, and grit or droplet in air-flow take electric charge soon, are shifted in the presence of electric field force
Collecting electrode, the droplet connection being attached on pole plate is in blocks, forms liquid film, liquid film falls into and removed under gravity together with grit
In the mud ditch of dirt device bottom.
Wet method deashing is one of the characteristics of wet electrical dust precipitator is different from dry electric precipitation device.Because wet electrical dust precipitator is
Dust is removed using the liquid film current on pole plate, without rapping apparatus, it is thus eliminated that the secondary fly-up of dust, improves and remove
Dirt efficiency.Wet electrical dust precipitator removes pole plate dust using liquid film current, and the deashing typically is referred to as into flushing water with water.Due to punching
The SO trapped in wash water containing wet electrical dust precipitator3, heavy metal, fine dust (PM2.5), therefore, flush discharge just into
To be similar to the sewage of desulfurization wastewater.
The main contamination index of domestic iron and steel enterprises sintering desulfuration water has：It is easily caused the calcium ion 1000-4000 (mg/ of fouling
L) with the chlorion 15000-20000 (mg/l) for being easily caused corrosion.Through measuring and calculating and live assay, wet electrical dust precipitator is rinsed
The main contamination index of draining has：The calcium ion 1000-4000 (mg/l) for the being easily caused fouling and chlorion 500- for being easily caused corrosion
1500(mg/l).Can wet electrical dust precipitator is required to rinse the sewage quantity for adding wet desulfurization system, the flushing water is entered
The effective purification of row, reuse, will largely influence the application and popularization of wet electrical dust precipitator.
The content of the invention
In view of the above-mentioned problems, the present invention provides and a kind of rationally reclaim, processing, removed using setting up wet type electricity after wet magnesium processes desulfurization
The sintering wet-type magnesium method desulfurization purification Waste Water Treatment and method for the waste water that dirt device is produced.
To achieve the above object of the invention, present invention sintering wet-type magnesium method desulfurization purification Waste Water Treatment, including to wet type
Wet electrical dust precipitator wastewater treatment subsystem, the wet electrical dust precipitator Sewage treatment subsystem of the flushing waste water processing of electric cleaner
And to desulfurizing tower export flue gas handled through mechanical dehydration after obtain dehydration wastewater treatment desulfurizing tower wastewater treatment subsystem,
Desulfurizing tower Sewage treatment subsystem；
Wherein,
The wet electrical dust precipitator wastewater treatment subsystem, including the first waste water of the storage flushing waste water being sequentially communicated are adjusted
Pond, the first neutralization pond, the first reaction tank, the first flocculation basin and clarifier, the first clear water reserviors are saved, wherein first clear water reserviors
Interior to be provided with chlorine ion concentration detection means, first clear water reserviors are connected with the desulfurizing tower wastewater treatment subsystem；
The slurries that the wet electrical dust precipitator Sewage treatment subsystem includes connecting with the slurries make-up system of purifying column are mended
To pipeline and the valve being arranged on the slurries supply pipeline；
The desulfurizing tower wastewater treatment subsystem, including be sequentially communicated storage flushing waste water the second wastewater equalization pond,
Second neutralization pond, the second reaction tank, the second flocculation basin, clarifier, the second clear water reserviors, and it is big particle diameter device for filtering impurities, small
Particle diameter impurity and chlorion filter；
Desulfurizing tower Sewage treatment subsystem includes connection small particle impurity and chlorion filter and wet scrubber
The industrial water purification transport pipeline of water supply tank and it is separately positioned on described big particle diameter device for filtering impurities；
First clear water reserviors are connected with second wastewater equalization pond；
The flushing waste water is at the uniform velocity inputted the first neutralization pond with predetermined amount of flow after the first wastewater equalization pond buffering and carried out
Acid-base neutralization reaction, then input the first reaction tank and chemically reacted with lime, then input the first flocculation basin and flocculated, then it is defeated
Enter clarifier, obtain supernatant, supernatant is exported to the first clear water reserviors, detects that the flushing waste water chlorion in the first clear water reserviors is dense
Degree, if chlorine ion concentration is higher than 20000mg/L, the supernatant is exported to the second wastewater equalization pond, if chlorine ion concentration
Less than 20000mg/L, then the supernatant is exported to the slurries make-up system of purifying column；
The dehydration waste water is at the uniform velocity inputted the second neutralization pond with predetermined amount of flow by the second wastewater equalization pond and carried out in soda acid
And reaction, then input the second reaction tank and chemically reacted with lime and heavy metal complexing agent, then input the progress of the second flocculation basin
Flocculation, then clarifier is inputted, supernatant is obtained, supernatant exports to the second clear water reserviors, then supernatant is used into ceramic membrane filter
Device carries out the contaminant filter reaction of big particle diameter, and the particle diameter of the big particle diameter impurity is 0.01 μm~1 μm, and obtained filtered fluid is adopted
Filtered with reverse osmosis membrane, obtain industrial water purification.
To achieve the above object of the invention, present invention sintering wet-type magnesium method desulfurization purification waste water treatment process, including to wet type
The processing of the flushing waste water of electric cleaner and the dehydration waste water obtained after flue gas is handled through mechanical dehydration is exported to desulfurizing tower
Processing；
Wherein, the processing that the dehydration waste water obtained after flue gas is handled through mechanical dehydration is exported to desulfurizing tower includes：
Desulfurizing tower is exported the dehydration waste water obtained after flue gas is handled through mechanical dehydration and inputs the second wastewater equalization pond by S4.11
Stored；
S4.12 is at the uniform velocity exported to the second neutralization pond the acid for be dehydrated waste water by the wastewater equalization pond with predetermined flow velocity
Basicity neutralisation treatment；
S4.13 exports the dehydration waste water to the second reaction tank, and lime and a huge sum of money are added in second reaction tank
Belong to complexing agent, the dehydration waste water is chemically reacted with the lime and heavy metal complexing agent；
S4.14 exports the dehydration waste water to flocculation basin, and flocculant, the dehydration waste water are added in the flocculation basin
Carry out flocculation reaction；
S4.15 exports the dehydration waste water to clarifier, and the clarifier exports supernatant to the second clear water reserviors；
S4.16 reacts the contaminant filter that supernatant carries out big particle diameter using ceramic filter, the big particle diameter impurity
Particle diameter is 0.01 μm~1 μm；
S4.17 will be obtained filtered fluid and be filtered using reverse osmosis membrane in step S4.16, obtain industrial water purification；
The processing of the described flushing waste water to wet electrical dust precipitator includes：
4.21, which export desulfurizing tower the dehydration waste water obtained after flue gas is handled through mechanical dehydration, inputs the first wastewater equalization pond
Stored；
S4.22 is at the uniform velocity exported to the first neutralization pond the acid for be dehydrated waste water by the wastewater equalization pond with predetermined flow velocity
Basicity neutralisation treatment；
S4.23 exports the dehydration waste water to the first reaction tank, and lime is added in first reaction tank, described de-
Water waste water is chemically reacted with the lime；
S4.24 exports the dehydration waste water to flocculation basin, and flocculant, the dehydration waste water are added in the flocculation basin
Carry out flocculation reaction；
S4.25 exports the dehydration waste water to clarifier, and the clarifier exports supernatant to the first clear water reserviors；
S4.26 detects the chloride ion-containing concentration of the supernatant in the first clear water reserviors,
If the chloride ion-containing concentration in supernatant is more than 20000mg/L, the supernatant is exported to the second waste water and adjusted
Pond is saved, step S4.11 to S4.17 is carried out.
If the chloride ion-containing concentration in supernatant is less than or equal to 20000mg/L, the supernatant is exported to desulfurization
Tower is used for the slurries make-up water of desulfurizing tower.
Further, described industrial water purification is back to the wet electrical dust precipitator, for the wet electrical dust precipitator
Flushing water；
Step S4.16 supernatants are carried out to the contaminant filter reaction of big particle diameter using ceramic filter, obtained impurity step
Filtered fluid is filtered using reverse osmosis membrane in rapid S4.17, and obtained impurity is used for sintered material.
Rinse water is by purification in present invention sintering wet-type magnesium method desulfurization purification Waste Water Treatment and technique, purifying column
Desulphurization circulating is carried out as slurry makeup water in return desulfurizing tower afterwards to use.Need that discharges to give up according to concentration of slurry in desulfurizing tower
Water is returned as flushing supplement water in purifying column by purification.Desulfurizing tower internal drainage is purified using purpose ceramic-film filter, with anti-
The advantages such as pollution, service life length.The strong brine of membranous system removing is sent to sintered material as mixing water, whole desulphurization system
Water system closed cycle, does not produce harmful waste water.
Brief description of the drawings
Fig. 1 is present invention process flow chart.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
Wet desulphurization increase wet electrical dust precipitator scheme be：Near desulfurizing tower increase newly a wet electrical dust precipitator tower and
Flue is discharged, saturated flue gas after desulfurization is introduced into wet electrical dust precipitator bottom in the middle part of the tower, first passed through after mechanical dehydration, into wet
Pass through discharge of pipes after the purification of formula electric cleaner.Mechanical dehydration and wet electrical dust precipitator flushing water, are in former desulphurization system water
Outside balance, newly-increased flushing waste water.The present invention is effluent part purification, reuse, and system water releveling provides one kind
Sinter wet-type magnesium method desulfurization purification Waste Water Treatment and technique.
Wet electrical dust precipitator flushing industry water purification enters water supply tank by moisturizing pipeline, is connect by water pump, electrically operated valve
Entering purifying column (purification deentrainment tower) is used to rinse wet electrical dust precipitator pole plate polar curve；Waste water after flushing enters by electrically operated valve
Waste water adds soda acid through pump lifting to neutralization pond in 1# wastewater equalization ponds, regulating reservoir, flows into reaction tank, flocculation basin and fully reacts
Afterwards, clarified into clarifier, top clear water flows into clear water reserviors, and the flushing water handled well is squeezed into desulfurizing tower lower slurry with pump
Pond, it is corresponding to reduce the new water for entering desulfurizing tower by moisturizing.
Embodiment 1
As shown in figure 1, the present embodiment sintering wet-type magnesium method desulfurization purification Waste Water Treatment, including to wet electrical dust precipitator
Flushing waste water processing wet electrical dust precipitator wastewater treatment subsystem, to desulfurizing tower output flue gas handled through mechanical dehydration after
The desulfurizing tower wastewater treatment subsystem of the dehydration wastewater treatment arrived；
Wherein,
Wet electrical dust precipitator wastewater treatment subsystem, wet type electricity including the flushing waste water processing to wet electrical dust precipitator are removed
Dirt device Sewage treatment subsystem and to desulfurizing tower export flue gas handled through mechanical dehydration after obtain dehydration wastewater treatment take off
Sulphur tower wastewater treatment subsystem, desulfurizing tower Sewage treatment subsystem；
Wherein,
The wet electrical dust precipitator wastewater treatment subsystem, including the first waste water of the storage flushing waste water being sequentially communicated are adjusted
Pond, the first neutralization pond, the first reaction tank, the first flocculation basin and clarifier, the first clear water reserviors are saved, wherein first clear water reserviors
Interior to be provided with chlorine ion concentration detection means, first clear water reserviors are connected with the desulfurizing tower wastewater treatment subsystem；
The wet electrical dust precipitator Sewage treatment subsystem includes connecting slurries with the slurries make-up system of the vulcanization tower
Supply pipeline and the valve being arranged on the slurries supply pipeline；
The desulfurizing tower wastewater treatment subsystem, including be sequentially communicated storage flushing waste water the second wastewater equalization pond,
Second neutralization pond, the second reaction tank, the second flocculation basin, clarifier, the second clear water reserviors, and it is big particle diameter device for filtering impurities, small
Particle diameter impurity and chlorion filter；
Desulfurizing tower Sewage treatment subsystem includes connection small particle impurity and chlorion filter and wet scrubber
The industrial water purification transport pipeline of water supply tank and it is separately positioned on described big particle diameter contaminant filter dress；
First clear water reserviors are connected with second wastewater equalization pond；
The flushing waste water is at the uniform velocity inputted the first neutralization pond with predetermined amount of flow by the first wastewater equalization pond and carried out in soda acid
And reaction, then input the first reaction tank and chemically reacted with lime, then input the first flocculation basin and flocculated, then input clarification
Device, obtains supernatant, and supernatant is exported to the first clear water reserviors, detects the flushing waste water chlorine ion concentration in the first clear water reserviors, if
Chlorine ion concentration is higher than 20000mg/L, then exports the supernatant to the second wastewater equalization pond, if chlorine ion concentration is less than
20000mg/L, then export the supernatant to the slurries make-up system of vulcanization tower；
The dehydration waste water is at the uniform velocity inputted the second neutralization pond with predetermined amount of flow by the second wastewater equalization pond and carried out in soda acid
And reaction, then input the second reaction tank and chemically reacted with lime and heavy metal complexing agent, then input the progress of the second flocculation basin
Flocculation, then clarifier is inputted, supernatant is obtained, supernatant exports to the second clear water reserviors, then supernatant is used into ceramic filter
The contaminant filter reaction of big particle diameter is carried out, the particle diameter of the big particle diameter impurity is 0.01 μm~1 μm, and obtained filtered fluid is used
Reverse osmosis membrane is filtered, and obtains industrial water purification.
Embodiment 2
As shown in figure 1, the present embodiment sintering wet-type magnesium method desulfurization purification waste water treatment process, including to wet electrical dust precipitator
Flushing waste water processing and to desulfurizing tower export flue gas handled through mechanical dehydration after obtain dehydration waste water processing；
Wherein, the processing that the dehydration waste water obtained after flue gas is handled through mechanical dehydration is exported to desulfurizing tower includes：
Desulfurizing tower is exported the dehydration waste water obtained after flue gas is handled through mechanical dehydration and inputs the second wastewater equalization pond by S4.11
Stored；
S4.12 is at the uniform velocity exported to the second neutralization pond the acid for be dehydrated waste water by the wastewater equalization pond with predetermined flow velocity
Basicity neutralisation treatment；
S4.13 exports the dehydration waste water to the second reaction tank, and lime and a huge sum of money are added in second reaction tank
Belong to complexing agent, the dehydration waste water is chemically reacted with the lime and heavy metal complexing agent；
S4.14 exports the dehydration waste water to flocculation basin, and flocculant, the dehydration waste water are added in the flocculation basin
Carry out flocculation reaction；
S4.15 exports the dehydration waste water to clarifier, and the clarifier exports supernatant to the second clear water reserviors；
S4.16 reacts the contaminant filter that supernatant carries out big particle diameter using ceramic filter, the big particle diameter impurity
Particle diameter is 0.01 μm~1 μm；
S4.17 will be obtained filtered fluid and be filtered using reverse osmosis membrane in step S4.16, obtain industrial water purification；
The processing of the described flushing waste water to wet electrical dust precipitator includes：
Desulfurizing tower is exported the dehydration waste water obtained after flue gas is handled through mechanical dehydration and inputs the first wastewater equalization pond by S4.21
Stored；
S4.22 is at the uniform velocity exported to the first neutralization pond the acid for be dehydrated waste water by the wastewater equalization pond with predetermined flow velocity
Basicity neutralisation treatment；
S4.23 exports the dehydration waste water to the first reaction tank, and lime is added in first reaction tank, described de-
Water waste water is chemically reacted with the lime；
S4.24 exports the dehydration waste water to flocculation basin, and flocculant, the dehydration waste water are added in the flocculation basin
Carry out flocculation reaction；
S4.25 exports the dehydration waste water to clarifier, and the clarifier exports supernatant to the first clear water reserviors；
S4.26 detects the chloride ion-containing concentration of the supernatant in the first clear water reserviors,
If the chloride ion-containing concentration in supernatant is more than 20000mg/L, the supernatant is exported to the second waste water and adjusted
Pond is saved, step S4.11 to S4.18 is carried out.
If the chloride ion-containing concentration in supernatant is less than or equal to 20000mg/L, the supernatant is exported to desulfurization
Tower is used for the slurries make-up water of desulfurizing tower.
Described industrial water purification is back to the wet electrical dust precipitator, the flushing water for the wet electrical dust precipitator；
Step S4.16 supernatants are carried out to the contaminant filter reaction of big particle diameter using ceramic filter, obtained impurity step
Filtered fluid is filtered using reverse osmosis membrane in rapid S4.18, and obtained impurity is used for sintered material.
Instantiation explanation：
One 360m2 sintering machine of certain iron and steel enterprise, flue gas mark condition air quantity 1305000Nm3/ h, 120 DEG C of temperature, vapor body
Product compares 12%, and original design uses a set of magnesium processes wet desulfurization system, now by original desulfurizing tower increase by one using mechanical dehydration and
The purifying column of wet electrical dust precipitator to flushing water in purifying column, it is necessary to be purified, utilized.
It is computed determining：Machinery removes fog+washing water quantity=1350+800=2150 ton days
As shown in figure 1, wet type desulfurizing described in the embodiment of the present invention sets up the new of the flushing waste water of wet electrical dust precipitator generation
Type processing and reuse method new processing method, comprise the following steps：
The new water system mode of operation of purifying column
Pattern 1：F1 valves are closed, and F2 valve openings, new demisting supply-water pump supplies water to deentrainment tower；
Pattern 2：F4 valve openings, reflux pump are opened, discontinuous, liquid level in control desulfurizing tower；
Pattern 3：Liquid level is automatically controlled by valve in clear water reserviors；
When absorbing liquid chlorine ion concentration reaches 15000-20000mg/L in desulfurizing tower, open valve F5 and adjusted to 2# waste water
Pond discharge opeing is saved, fresh absorbing liquid is supplemented after terminating；
When starting absorbing liquid in discharge desulfurizing tower, reflux pump stops backflow；
When waste strength reaches 20000mg/L in deentrainment tower, F5, F6, F7 1# wastewater equalization pond discharge opeings of valve are opened.
Before transformation, desulfurizing tower operation needs flushing water in the ton day of continuous supplementation water 1350 into tower, purification deentrainment tower to mend
The ton day of filled water amount 800, flushing water and mechanical dehydration, the total ton day of draining 2150 of wet electrical dust precipitator dehydration.According to the present invention
After technological transformation, desulfurizing tower is not required to supplement the new ton day of water 1350, and industrial water purification 800 is supplemented once per circumferential purification deentrainment tower is interior
120 tons of strong brines are discharged to sintering, stock ground mixing dosage and used by ton, film filter timing daily, greatly reduce new water consumption,
New externally discharged waste water is not produced.
Wet electrical dust precipitator flushing industry water purification enters water supply tank by moisturizing pipeline, is connect by water pump, electrically operated valve
Entering to purify deentrainment tower is used to rinse wet electrical dust precipitator pole plate polar curve；Waste water after flushing is adjusted by electrically operated valve into 1# waste water
Pond is saved, waste water adds soda acid through pump lifting to neutralization pond in regulating reservoir, flowed into after reaction tank, flocculation basin fully react, into clear
Clear device clarification, top clear water flows into clear water reserviors, the flushing water handled well is squeezed into desulfurizing tower lower slurry pond with pump, corresponding to reduce
Enter the new water of desulfurizing tower by moisturizing.
According to sulfur removal technology needs, when absorbing liquid chlorine ion concentration reaches 15000-20000mg/L in desulfurizing tower, open
Electrically operated valve supplements fresh absorbing liquid to 2# wastewater equalization pond discharge opeings after terminating；Clear water reserviors and clarifier bottom do not meet reuse
It is required that waste water the 2# wastewater equalization ponds of desulfurizing tower draining are squeezed into pump.Waste water adds acid through pump lifting to neutralization pond in regulating reservoir
Alkali, after inflow reaction tank, flocculation basin fully react, into clarifier clarification, top clear water flows into clear water reserviors, the clear water chlorion
Concentration is higher than 20000 (mg/l), it is necessary to can just be recycled using membranous system desalination.
Common PVDF materials milipore filter can not be applicable high pollution index SDI desulfurization wastewater, and its milipore filter is easily blocked up, and is used
Short life, pre-processing requirements height etc., and the high anti-soil milipore filter of ceramic membrane sintering can be applicable desulfurization wastewater processing, but set
Standby expense is higher than PVDF material membrane modules, and because desulfurization wastewater discharge capacity is smaller, technical feasibility operational reliability is most important factor,
Plus ceramic membrane filter service life up to more than 5 years, comprehensive cost performance is higher.Ceramic membrane adds high pressure ro treatment technology,
Water purification after being handled through membrane filtration is as flushing water moisturizing, waste water pump under the strong brine and clarifier and clear water reserviors under film removing
Get to sintered material and do mixing water.
More than, only presently preferred embodiments of the present invention, but protection scope of the present invention is not limited thereto, and it is any to be familiar with sheet
Those skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in should all be covered
Within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should be defined by claim is defined.
Claims (3)
1. one kind sintering wet-type magnesium method desulfurization purification Waste Water Treatment, it is characterised in that including being rushed to wet electrical dust precipitator
Wash the wet electrical dust precipitator wastewater treatment subsystem of wastewater treatment, wet electrical dust precipitator Sewage treatment subsystem and to desulfurizing tower
Desulfurizing tower wastewater treatment subsystem, the desulfurizing tower waste water for the dehydration wastewater treatment that output flue gas is obtained after being handled through mechanical dehydration are returned
Receive subsystem；
Wherein,
The wet electrical dust precipitator wastewater treatment subsystem, includes the first waste water regulation for the storage flushing waste water being sequentially communicated
Pond, the first neutralization pond, the first reaction tank, the first flocculation basin and clarifier, the first clear water reserviors, wherein in first clear water reserviors
Provided with chlorine ion concentration detection means, first clear water reserviors are connected with the desulfurizing tower wastewater treatment subsystem；
The wet electrical dust precipitator Sewage treatment subsystem includes the slurries supply pipe connected with the slurries make-up system of purifying column
Road and the valve being arranged on the slurries supply pipeline；
The desulfurizing tower wastewater treatment subsystem, including be sequentially communicated storage flushing waste water the second wastewater equalization pond, second
Neutralization pond, the second reaction tank, the second flocculation basin, clarifier, the second clear water reserviors, and big particle diameter device for filtering impurities, small particle
Impurity and chlorion filter；
Desulfurizing tower Sewage treatment subsystem includes the moisturizing of connection small particle impurity and chlorion filter and wet scrubber
The industrial water purification transport pipeline of case and it is separately positioned on described big particle diameter device for filtering impurities；
First clear water reserviors are connected with second wastewater equalization pond；
The flushing waste water is at the uniform velocity inputted the first neutralization pond with predetermined amount of flow after the first wastewater equalization pond buffering and carries out soda acid
Neutralization reaction, then input the first reaction tank and chemically reacted with lime, then input the first flocculation basin and flocculated, then input clear
Clear device, obtains supernatant, and supernatant is exported to the first clear water reserviors, detects the flushing waste water chlorine ion concentration in the first clear water reserviors,
If chlorine ion concentration is higher than 20000mg/L, the supernatant is exported to the second wastewater equalization pond, if chlorine ion concentration is less than
20000mg/L, then export the supernatant to the slurries make-up system of purifying column；
It is anti-that the dehydration waste water at the uniform velocity inputs the second neutralization pond progress acid-base neutralization with predetermined amount of flow by the second wastewater equalization pond
Answer, then input the second reaction tank and chemically reacted with lime and heavy metal complexing agent, then input the second flocculation basin and flocculated,
Clarifier is inputted again, supernatant is obtained, supernatant is exported to the second clear water reserviors, then supernatant is carried out using purpose ceramic-film filter
The contaminant filter reaction of big particle diameter, the particle diameter of the big particle diameter impurity is 0.01 μm~1 μm, and obtained filtered fluid is used into reverse osmosis
Permeable membrane is filtered, and obtains industrial water purification.
2. one kind sintering wet-type magnesium method desulfurization purification waste water treatment process, it is characterised in that including being rushed to wet electrical dust precipitator
Wash the processing of waste water and the processing of the dehydration waste water obtained after flue gas is handled through mechanical dehydration is exported to desulfurizing tower；
Wherein, the processing that the dehydration waste water obtained after flue gas is handled through mechanical dehydration is exported to desulfurizing tower includes：
Desulfurizing tower is exported the dehydration waste water obtained after flue gas is handled through mechanical dehydration and inputs the progress of the second wastewater equalization pond by S4.11
Storage；
S4.12 is at the uniform velocity exported to the second neutralization pond the acid-base value for be dehydrated waste water by the wastewater equalization pond with predetermined flow velocity
Neutralisation treatment；
S4.13 exports the dehydration waste water to the second reaction tank, and lime and heavy metal network are added in second reaction tank
Mixture, the dehydration waste water is chemically reacted with the lime and heavy metal complexing agent；
S4.14 exports the dehydration waste water to flocculation basin, and flocculant is added in the flocculation basin, and the dehydration waste water is carried out
Flocculation reaction；
S4.15 exports the dehydration waste water to clarifier, and the clarifier exports supernatant to the second clear water reserviors；
S4.16 reacts the contaminant filter that supernatant carries out big particle diameter using ceramic filter, the particle diameter of the big particle diameter impurity
For 0.01 μm~1 μm；
S4.17 will be obtained filtered fluid and be filtered using reverse osmosis membrane in step S4.16, obtain industrial water purification；
The processing of the described flushing waste water to wet electrical dust precipitator includes：
4.21, which export desulfurizing tower the dehydration waste water obtained after flue gas is handled through mechanical dehydration, inputs the progress of the first wastewater equalization pond
Storage；
S4.22 is at the uniform velocity exported to the first neutralization pond the acid-base value for be dehydrated waste water by the wastewater equalization pond with predetermined flow velocity
Neutralisation treatment；
S4.23 exports the dehydration waste water to the first reaction tank, and lime is added in first reaction tank, and the dehydration is given up
Water is chemically reacted with the lime；
S4.24 exports the dehydration waste water to flocculation basin, and flocculant is added in the flocculation basin, and the dehydration waste water is carried out
Flocculation reaction；
S4.25 exports the dehydration waste water to clarifier, and the clarifier exports supernatant to the first clear water reserviors；
S4.26 detects the chloride ion-containing concentration of the supernatant in the first clear water reserviors,
If the chloride ion-containing concentration in supernatant is more than 20000mg/L, the supernatant is exported to the second wastewater equalization pond,
Carry out step S4.11 to S4.17；
If the chloride ion-containing concentration in supernatant is less than or equal to 20000mg/L, the supernatant is exported to desulfurizing tower and used
In the slurries make-up water of desulfurizing tower.
3. sintering wet-type magnesium method desulfurization purification waste water treatment process according to claim 2, it is characterised in that will be described
Industrial water purification is back to the wet electrical dust precipitator, the flushing water for the wet electrical dust precipitator；
Step S4.16 supernatants are carried out to the contaminant filter reaction of big particle diameter, obtained impurity step using ceramic filter
Filtered fluid is filtered using reverse osmosis membrane in S4.17, and obtained impurity is used for sintered material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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