CN107986501A - A kind of processing unit and its application method for ship tail gas desulfurization wastewater - Google Patents
A kind of processing unit and its application method for ship tail gas desulfurization wastewater Download PDFInfo
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- CN107986501A CN107986501A CN201711432180.0A CN201711432180A CN107986501A CN 107986501 A CN107986501 A CN 107986501A CN 201711432180 A CN201711432180 A CN 201711432180A CN 107986501 A CN107986501 A CN 107986501A
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/206—Manganese or manganese compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
Abstract
The present invention provides a kind of processing unit for ship tail gas desulfurization wastewater, including waste water treatment tank, plate and frame filter press and ClO2Generator, is connected by pipeline between three；Waste water treatment tank top is equipped with and is attached thereto sodium hydroxide tank, flocculant tank and flocculation aid tank；Plate and frame filter press is equipped with water inlet and water outlet, and water inlet is connected by pipeline with high pressure sludge pump, and water outlet is connected with drainpipe；ClO2Generator is arranged on the pipeline between the water outlet of plate and frame filter press and drainpipe, and gas is mixed by gas distributor with the solution in drainpipe.Waste water is stirred flocculation treatment into waste water treatment tank, then squeezes into plate and frame filter press, filters out heavy metal, PM and flocculant gel, passes through gas distributor waste water and ClO into drainpipe afterwards2Gas is fully reacted.The present invention is high to the removal efficiency of heavy metal, PM, PAHs and COD etc., and whole process integration is high, and occupancy is small, can realize the switching according to different regime modes.
Description
Technical field
The present invention relates to the technical field of ship tail gas discharge, more particularly to a kind of place for ship tail gas desulfurization wastewater
Manage device and its application method.
Background technology
In international trade, more than the 90% of bulk supply tariff relies on transport by sea, is provided according to MARPOL pact supplemental provisions VI,
Navigate by water the ship in emission control area (ECA), it is necessary to combustion of sulfur amount is equal to or less than the Low Sulfur Fuel Oil of 0.10% (m/m), or
Ship uses approved emission-reduction technology, makes SO2Discharge be equivalent to burning be equal to or small 0.10% Low Sulfur Fuel Oil.Compared to combustion
Burning high-sulfur oils, the fuel cost that ship burning low-sulfur oil will make ship additionally increase by 70%, therefore it is main during ship's navigation
Burning high sulfur oil.
To meet higher SO2Removing requires, and frequently with Wet Flue Gas Desulfurization Technique, sodium alkali desulfurization is comparative maturity at this stage
Efficient ship tail gas sulfur method.Exhaust gas is contacted into desulfurization washing tower with soda cleaning solution, the dirt in heavy oil engine combustion tail gas
Thing is contaminated, such as particulate matter (PM), SO2、NO2Absorbed Deng by soda lye, which part particulate matter formation heavy metallic salt soluble in water,
PAHs and COD, not soluble in water is partially suspended in water；Uncombusted oil gas enters in doctor solution with tail gas, adds waste water
In total oil content；SO2 is absorbed to form Na by soda lye2SO3And NaHSO3；NO2It is dissolved in water and forms NaNO3And NaNO2.According to
IMO to the washings discharge indexs of marine exhaust cleaning systems regulation and《Pollution From Ships thing discharge standard》, it is pH value, COD, turbid
Spend (PM), PAHs,Deng the pollutant that will be controlled as primary discharge.
The content of the invention
The object of the present invention is to provide a kind of processing unit and its application method for ship tail gas desulfurization wastewater, pass through
Waste water treatment tank, plate and frame filter press and ClO are set2Generator, it is intended to significantly improve the treatment effeciency and discharge of wastewater of waste water
Quality.
To achieve these goals, the technical scheme is that：A kind of processing for ship tail gas desulfurization wastewater fills
Put, it is characterised in that：The processing unit includes waste water treatment tank, plate and frame filter press and ClO2Generator, leads between three
Pipeline is crossed to be connected；The waste water treatment tank top is equipped with and is attached thereto sodium hydroxide tank, flocculant tank and flocculation aid tank；It is described
Plate compression motor spindle be equipped with bearing material pallet, plate and frame filter press is equipped with water inlet and water outlet, water inlet pass through pipeline with it is high
Pressure sludge pump is connected, and water outlet is connected with drainpipe；The ClO2Generator is arranged at water outlet and the row of plate and frame filter press
On pipeline between water pipe, ClO2The gas that generator produces is mixed by gas distributor with the solution in drainpipe.
There is choosing, sodium hydroxide tank is connected with waste water treatment tank by sodium hydroxide peristaltic pump, is equipped with waste water treatment tank
PH feedback devices, adjust the flow of sodium hydroxide peristaltic pump so that waste water treatment tank according to the numerical value of PH feedback devices offer
In pH value be maintained at 7.5-8.5 scopes.
Further, flocculant tank is connected by flocculant peristaltic pump with waste water treatment tank, and flocculation aid tank is compacted by flocculation aid
Dynamic pump is connected with waste water treatment tank.
Further, the outlet of the high pressure sludge pump is equipped with threeway, wherein passing through strainer valve and plate compression all the way
The water inlet of machine is connected, and another way is connected by mixing circulation valve with waste water treatment tank so that desulfurization wastewater returns wastewater treatment
Groove is mixed, and makes desulfurization wastewater and flocculation aid, incorporation time >=10min of flocculant.
A kind of application method of processing unit for ship tail gas desulfurization wastewater, it is characterised in that：The user
Method includes the following steps：A, circulation desulfurization washings initially enter waste water treatment tank, and soda, flocculation are added by measuring peristaltic pump
Agent and flocculation aid, then carry out internal circulation using high pressure sludge pump, achieve the purpose that stirring；B, will be flocculated using high-pressure pump
Desulfurization wastewater afterwards squeezes into plate and frame filter press, filters out heavy metal, PM and flocculant gel；Liquid after c filterings passes through plate
The water outlet of frame filter press is discharged into drainpipe, passes through the ClO being arranged on pipeline2Generator so that ClO2Gas is fully and desulfurization
Waste water comes into full contact with oxidation, achievees the purpose that the PAHs and COD that degrades, is discharged after last wastewater to reach standard.
Further, in a steps, waste water treatment tank top is equipped with and is attached thereto sodium hydroxide tank, flocculant tank and flocculation aid
Tank, sodium hydroxide tank are connected by sodium hydroxide peristaltic pump with waste water treatment tank；Further, PH is equipped with waste water treatment tank to feed back
Device, adjusts the flow of sodium hydroxide peristaltic pump so that the PH in waste water treatment tank according to the numerical value of PH feedback devices offer
Value is maintained at 7.5-8.5 scopes, and flocculant tank is connected by flocculant peristaltic pump with waste water treatment tank, and flocculation aid tank is solidifying by helping
Agent peristaltic pump is connected with waste water treatment tank.
In b step, the plate compression motor spindle is equipped with bearing material pallet, and plate and frame filter press is equipped with water inlet and water outlet
Mouthful, water inlet is connected by pipeline with high pressure sludge pump, and water outlet is connected with drainpipe；
The outlet of the high pressure sludge pump is equipped with threeway, wherein passing through strainer valve and the water inlet of plate and frame filter press all the way
It is connected, another way is connected by mixing circulation valve with waste water treatment tank so that desulfurization wastewater is returned waste water treatment tank and mixed
Stirring, makes desulfurization wastewater and flocculation aid, incorporation time >=10min of flocculant.
Relative to the prior art, technical scheme further includes many details except the improvement of overall technical architecture
The improvement of aspect, specifically, has the advantages that：
1st, improvement project of the present invention, processing unit include waste water treatment tank, plate and frame filter press and ClO2Generator,
Be connected between three by pipeline, waste water enters desulfurization wastewater treatment trough, by measure peristaltic pump add soda, flocculant and
Flocculation aid, after being stirred, squeezes into plate and frame filter press by the desulfurization wastewater after flocculation using high-pressure pump, filters out heavy metal, PM
And flocculant gel.ClO of the liquid through body with generation after filtering2Oxidation is come into full contact with, reaches the mesh of degraded PAHs and COD
, waste water significant effect is handled, speed is fast, effect is high；
2nd, PH feedback devices are equipped with the desulfurization wastewater treatment trough of technical scheme, are provided according to PH feedback devices
Numerical value to adjust the flow of sodium hydroxide peristaltic pump in real time so that the pH value in waste water treatment tank is maintained at 7.5-8.5 scopes,
Ensure the effect of subsequent wastewater treatment；
3rd, the present invention sets ClO before drainpipe2Generator, reduces the input of equipment, is made by gas distributor
Obtain desulfurization wastewater and ClO2Gas comes into full contact with, and ensure that the effect and quality of processing；
4th, the device of the invention integrated level is high, small, high using semicontinuous operation, the degree of automation；In heavy metal, PM
In processing system, only in filtering addition flocculant at initial stage and flocculation aid, it can stop after sheet frame forms the filter cake of densification, reduce
Supplies consumption, in addition cake moisture is low, and shared storage area is small, easy to spread and application；
5th, technique of the invention is simple, time-consuming short, and effect is good, and whole technique realizes automation in flow, in volume
On integrated, be easily installed and maintenance in the future, reduce cost, improve efficiency.
Brief description of the drawings
Fig. 1 is the structure diagram of embodiment of the present invention.
Fig. 2 is the structure diagram that device of the present invention removes waste water treatment tank.
Fig. 3 is the another structure diagram of embodiment of the present invention.
Fig. 4 is the structure diagram that device of the present invention removes plate and frame filter press.
Fig. 5 is process flow diagram of the present invention.
Reference numeral：
1. plate and frame filter press；2. waste water treatment tank；3.ClO2Generator；4. sodium hydroxide tank；5. flocculant tank；6. help solidifying
Agent tank；7. sodium hydroxide peristaltic pump；8. flocculant peristaltic pump；9. flocculation aid peristaltic pump；10. bearing material pallet；
11. high pressure sludge pump；12. remove strainer valve；13. mixing circulation valve；14. pump intake valve；15.pH feedback devices；16.
Gas distributor；17. waste water slurries filter entrance；18.ClO2Air outlet pipe；19. drainpipe.
Embodiment
Technical scheme is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's all other embodiments obtained without making creative work, belong to the scope of protection of the invention.
In the description of the present invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
It to be to be connected directly, can also be indirectly connected by intermediary, can be the connection inside two elements.For this area
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
The present invention provides a kind of processing unit for ship tail gas desulfurization wastewater, with reference in figure 1, it is characterised in that：
The processing unit includes waste water treatment tank, plate and frame filter press and ClO2Generator, is connected between three, layer by layer by pipeline
Propulsion is effectively treated waste water；The waste water treatment tank top be equipped be attached thereto sodium hydroxide tank, flocculant tank and
Flocculation aid tank, connects between the tank body of these three sodium hydroxide tanks, flocculant tank and flocculation aid tank, on each tank body side by side
A watch window is equipped with, top is equipped with charge door, and charge door is equipped with corresponding lid, mixer is equipped with waste water treatment tank
Structure, the rabbling mechanism are divided into longitudinal rabbling mechanism and horizontal rabbling mechanism, and longitudinal rabbling mechanism is arranged at bottom, laterally stirs
Mix mechanism and be arranged at waste water treatment tank side close to the position of bottom, two rabbling mechanisms, which coordinate, enables mixed liquor fully to mix
Close, stirring is more thorough, and mixing is more abundant.
Further, the plate compression motor spindle is equipped with bearing material pallet, for accepting the filter cake unloaded automatically, sheet frame pressure
Filter is equipped with water inlet and water outlet, and water inlet is connected by pipeline with high pressure sludge pump, and water outlet is connected with drainpipe；It is described
ClO2Generator is arranged on the pipeline between the water outlet of plate and frame filter press and drainpipe, ClO2The gas that generator produces
Mixed by gas distributor with the solution in drainpipe, ClO here2Generator is directly laid on discharge pipe line,
Space is saved, improves efficiency, simultaneously because the volume reason of drainpipe, so enables to liquid by gas distributor
It is sufficiently mixed with gas, in order to improve the efficiency of mixing, an angle, this angle is equipped between gas distributor and drainpipe
It is the outlet of gas distributor and the water (flow) direction of drainpipe is in 75 degree of angle, guarantee gas reversely squeezes into draining along current
Guan Zhong, washes away gas and instant water mixing by current, is so conducive to gas mixing, is further ensured that the effect of mixing
Fruit.
Specifically, circulation desulfurization washing water section enter desulfurization wastewater treatment trough, by measure peristaltic pump addition soda,
Flocculant and flocculation aid, then carry out internal circulation using sludge pump, achieve the purpose that stirring；When ensureing certain stop
Between, the desulfurization wastewater after flocculation is squeezed into plate and frame filter press using high-pressure pump, filters out heavy metal, PM and flocculant gel.
Liquid after filtering sets gas distributor through pipeline in pipeline, under its effect, liquid and the ClO produced2Fully connect
Oxidation is touched, achievees the purpose that the PAHs and COD that degrades；Then qualified discharge.
In one embodiment, sodium hydroxide tank is connected by sodium hydroxide peristaltic pump with waste water treatment tank, wastewater treatment
PH feedback devices are equipped with groove, the flow of sodium hydroxide peristaltic pump are adjusted according to the numerical value of PH feedback devices offer so that useless
PH value in water treatment trough is maintained at 7.5-8.5 scopes.Flocculant tank is connected by flocculant peristaltic pump with waste water treatment tank, is helped
Solidifying agent tank is connected by flocculation aid peristaltic pump with waste water treatment tank.
Further, the outlet of the high pressure sludge pump is equipped with threeway, wherein passing through strainer valve and plate and frame filter press all the way
Water inlet be connected, another way is connected by mixing circulation valve with waste water treatment tank, the pipeline of that identical with strainer valve all the way
The ratio between diameter pipe diameter identical with mixing circulation valve with another way is 1:4-6 so that desulfurization wastewater returns waste water treatment tank
It is mixed, makes desulfurization wastewater and flocculation aid, incorporation time >=10min of flocculant, optimal incorporation time is 12-
15min。
In another embodiment, board design, power 10MW are carried out by taking S60 machines as an example, desulfurization wastewater treating capacity is
1m3/ h, is related to equipment size as calculation basis.In heavy metal, PM processing systems, by measuring peristaltic pump to desulfurization
Soda, flocculant and flocculation aid are added in waste water treatment tank, carries out internal circulation stirring using high pressure sludge pump, flow is
5m3/h.In heavy metal, PM processing systems, metering peristaltic pump can according to pH value of solution in desulfurization wastewater treatment trough, viscosity it is anti-
Feedback, adjusts flow in real time.In heavy metal, PM processing systems, ensure waste water and flocculant and flocculation aid is mixed the time
≥10min.In PAHs, COD processing system, ClO is utilized2Degrade PAHs oxidation COD, according to the initial concentration of PAHs and COD
Draw ClO2Tolerance be 1kg/h.In PAHs, COD processing system, gas distributor is set, makes desulfurization waste liquor and generation
ClO2Gas comes into full contact with.High pressure mud pump discharge sets triple valve, distributes 5m3/ h liquid carries out internal circulation stirring, 1m3/h
Into plate-frame filtering, realize that a pump is dual-purpose.Wastewater treatment sump volume 500L, sodium hydroxide tank volume 50L, flocculant tank and help it is solidifying
Agent tank volume 20L, automatic discharging plate and frame filter press size 2.5m*1m*1m, ClO2Generator size 0.5m*0.7m*1.3m.It is whole
Covering device can realize automation, and be integrated in volume, specification 3m*1m*1.5m.
In conclusion the device of the invention integrated level is high, small；It is high using semicontinuous operation, the degree of automation；In weight
In metal, PM processing systems, only in filtering addition flocculant at initial stage and flocculation aid, it can stop after sheet frame forms the filter cake of densification
Only, supplies consumption is reduced, in addition cake moisture is low, and shared storage area is small；In PAHs, COD processing system, directly in mistake
ClO is set in filter liquor pipeline2Gas distributor, reduces equipment investment；Desulfurization wastewater pH=8 after the present invention is handled,
COD≤100mg/L, PAHs≤50 μ g/L, SS≤70mg/L, Cd≤0.1mg/L, Cr≤1.5mg/L, Hg≤0.05mg/L, As
≤ 0.5mg/L, Zn≤2.0mg/L, Pb≤1.0mg/L, Cu≤0.5mg/L, Ni≤1.0mg/L, Mn≤2.0mg/L, reaches
Discharge standard.
In one embodiment, application method includes the following steps：A, circulation desulfurization washings are initially entered at waste water
Groove is managed, soda, flocculant and flocculation aid is added by measuring peristaltic pump, then carries out internal circulation using high pressure sludge pump,
Achieve the purpose that stirring；B, the desulfurization wastewater after flocculation is squeezed into plate and frame filter press using high-pressure pump, filter out heavy metal, PM with
And flocculant gel；Liquid after c filterings is discharged into drainpipe by the water outlet of plate and frame filter press, by being arranged on pipeline
ClO2Generator so that ClO2Gas fully comes into full contact with oxidation with desulfurization wastewater, achievees the purpose that the PAHs and COD that degrades, finally
Discharged after wastewater to reach standard.
Further, in a steps, waste water treatment tank top is equipped with and is attached thereto sodium hydroxide tank, flocculant tank and flocculation aid
Tank, sodium hydroxide tank are connected by sodium hydroxide peristaltic pump with waste water treatment tank；Further, PH is equipped with waste water treatment tank to feed back
Device, adjusts the flow of sodium hydroxide peristaltic pump so that the PH in waste water treatment tank according to the numerical value of PH feedback devices offer
Value is maintained at 7.5-8.5 scopes, and flocculant tank is connected by flocculant peristaltic pump with waste water treatment tank, and flocculation aid tank is solidifying by helping
Agent peristaltic pump is connected with waste water treatment tank.
In b step, the plate compression motor spindle is equipped with bearing material pallet, and plate and frame filter press is equipped with water inlet and water outlet
Mouthful, water inlet is connected by pipeline with high pressure sludge pump, and water outlet is connected with drainpipe；The outlet of the high pressure sludge pump is set
There is threeway, wherein being connected all the way by strainer valve with the water inlet of plate and frame filter press, another way passes through mixing circulation valve and waste water
Treatment trough is connected so that desulfurization wastewater is returned waste water treatment tank and is mixed, and makes desulfurization wastewater and flocculation aid, flocculant
Incorporation time >=10min.
In step c, ClO2The ClO of generator output2Tolerance be 0.8-1.2kg/h, pass through gas distributor so that de-
Sulphur waste liquid and the ClO produced2Gas comes into full contact with.
Specifically, its operating procedure step is as follows：
1st, with 1m3The flow of/h continuous supplementation desulfurization wastewater into waste water treatment tank, and ensure that waste water treatment tank has 400L
The liquid level of left and right；
2nd, flocculation aid PAM and wadding are added into waste water treatment tank by peristaltic pump respectively according to 1.5g/h, the amount of 1.5kg/h
Solidifying agent PAFS, the addition of NaOH is controlled by pH feedback devices, maintains the pH in waste water treatment tank 8 or so；
3rd, desulfurization wastewater liquid conveying is carried out by high pressure sludge pump, distributes 1m3/ h goes plate and frame filter press to be filtered, point
With 5m3/ h returns to waste water treatment tank and liquid is mixed, and ensures the residence time of flocculation aid, flocculant and desulfurization wastewater
≥10min；
4、ClO2Desulfurization wastewater after plate and frame filter press is handled is added to by gas distributor with the tolerance of 1kg/h
In drainage pipeline, gas distributor can make ClO2Gas comes into full contact with reaction with desulfurization wastewater, then directly outer row.
In the case of implementation result, pass through the device of the invention and technique so that the water quality of discharge of wastewater reaches discharge
Standard, it is specific as follows
Implementation result 1：The desulfurization wastewater of 20L is taken, keeps original pH=7, adds PAM=1.5mg/L, PAFS=1.5g/
L, stirs 2min, filtering, takes filtrate analysis, wherein Cd is not detected, and Cr=0.0019mg/L, Hg is not detected, As=0.0724mg/
L, Zn=0.5139mg/L, Pb are not detected, Cu=0.0527mg/L, Ni=0.0662mg/L, Mn=0.1931mg/L；
Implementation result 2：The desulfurization wastewater of 20L is taken, adjusts pH=8, adds PAM=1.5mg/L, PAFS=1.5g/L, stirring
2min, filtering, takes filtrate analysis, and wherein Cd is not detected, and Cr is not detected, and Hg is not detected, and As is not detected, Zn=0.1157mg/L,
Pb=0.0113mg/L, Cu=0.0472mg/L, Ni=0.0480mg/L, Mn=0.0831mg/L, PAHs=156.2mg/L；
Implementation result 3：The desulfurization wastewater of 20L is taken, adjusts pH=8, only adds PAFS=1.5g/L, stirs 2min, filtering, takes
Filtrate analysis, wherein Cd do not detect, and Cr is not detected, and Hg is not detected, As=0.0554mg/L, Zn=0.0778mg/L, Pb=
0.0146mg/L, Cu=0.0333mg/L, Ni=0.0461mg/L, Mn=0.0693mg/L；
Implementation result 4：The desulfurization wastewater of 20L is taken, adjusts pH=8, stirs 2min, filtering, takes filtrate analysis, wherein Cd is not examined
Go out, Cr is not detected, and Hg is not detected, As=0.0732mg/L, Zn=0.3089mg/L, and Pb is not detected, Cu=0.0325mg/L, Ni
=0.0488mg/L, Mn=0.0462mg/L, PAHs=157.4mg/L；
Implementation result 5：The desulfurization wastewater of 20L is taken, it is without any processing, directly filter, take filtrate analysis, wherein Cd is not examined
Go out, Cr=0.0048mg/L, Hg is not detected, and As is not detected, Zn=0.1313mg/L, Pb=0.0013mg/L, Cu=
0.0276mg/L, Ni=0.0487mg/L, Mn=0.6934mg/L；
Implementation result 6：The desulfurization wastewater of 20L is taken, adjusts pH=8, adds PAM=1.5mg/L, PAFS=1.5g/L,
0.3gClO2, 2min is stirred, filtering, takes filtrate analysis, the μ g/L of wherein PAHs≤12.25；
Implementation result 7：The desulfurization wastewater of 20L is taken, adjusts pH=8, adds 0.3gClO2, 2min is stirred, filtering, takes filtrate point
Analysis, wherein PAHs=0.266 μ g/L.
In conclusion the device of the invention integrated level is high, and it is small, it is high using semicontinuous operation, the degree of automation；In weight
In metal, PM processing systems, only in filtering addition flocculant at initial stage and flocculation aid, it can stop after sheet frame forms the filter cake of densification
Only, supplies consumption is reduced, in addition cake moisture is low, and shared storage area is small, easy to spread and application；It is meanwhile of the invention
Technique is simple, time-consuming short, and effect is good, and whole technique realizes automation in flow, is integrated in volume, easy to pacify
Dress and maintenance in the future, reduce cost, improve efficiency.
The specific embodiment of the present invention is described in detail above, but it is intended only as example, it is of the invention and unlimited
It is formed on particular embodiments described above.To those skilled in the art, it is any to the equivalent modifications that carry out of the present invention and
Substitute also all among scope of the invention.Therefore, the impartial conversion made without departing from the spirit and scope of the invention and
Modification, all should be contained within the scope of the invention.
Claims (8)
- A kind of 1. processing unit for ship tail gas desulfurization wastewater, it is characterised in that：The processing unit is included at waste water Manage groove, plate and frame filter press and ClO2Generator, is connected by pipeline between three；The waste water treatment tank top is equipped with and is attached thereto sodium hydroxide tank, flocculant tank and flocculation aid tank；The plate compression motor spindle is equipped with bearing material pallet, and plate and frame filter press is equipped with water inlet and water outlet, and water inlet passes through Pipeline is connected with high pressure sludge pump, and water outlet is connected with drainpipe；The ClO2Generator is arranged on the pipeline between the water outlet of plate and frame filter press and drainpipe, ClO2Generator produces Raw gas is mixed by gas distributor with the solution in drainpipe.
- A kind of 2. processing unit for ship tail gas desulfurization wastewater according to claim 1, it is characterised in that：Hydroxide Sodium tank is connected by sodium hydroxide peristaltic pump with waste water treatment tank, and PH feedback devices are equipped with waste water treatment tank, are fed back according to PH The numerical value that device provides adjusts the flow of sodium hydroxide peristaltic pump so that the pH value in waste water treatment tank is maintained at 7.5-8.5 Scope.
- A kind of 3. processing unit for ship tail gas desulfurization wastewater according to claim 1, it is characterised in that：Flocculant Tank is connected by flocculant peristaltic pump with waste water treatment tank, and flocculation aid tank is connected by flocculation aid peristaltic pump with waste water treatment tank.
- A kind of 4. processing unit for ship tail gas desulfurization wastewater according to claim 1, it is characterised in that：Described The outlet of high pressure sludge pump is equipped with threeway, wherein being connected all the way by strainer valve with the water inlet of plate and frame filter press, another way is led to Cross mixing circulating valve with waste water treatment tank to be connected so that desulfurization wastewater is returned waste water treatment tank and is mixed, and makes desulfurization give up Water and flocculation aid, incorporation time >=10min of flocculant.
- 5. a kind of application method of processing unit for ship tail gas desulfurization wastewater according to claim 1, its feature It is：The application method includes the following steps：A, circulation desulfurization washings initially enter waste water treatment tank, pass through metering Peristaltic pump addition soda, flocculant and flocculation aid, then carry out internal circulation using high pressure sludge pump, reach the mesh of stirring 's；B, the desulfurization wastewater after flocculation is squeezed into plate and frame filter press using high-pressure pump, filters out heavy metal, PM and flocculant and coagulate Glue；Liquid after c filterings is discharged into drainpipe by the water outlet of plate and frame filter press, passes through the ClO being arranged on pipeline2Occur Device so that ClO2Gas fully comes into full contact with oxidation with desulfurization wastewater, achievees the purpose that the PAHs and COD that degrades, and last waste water reaches Discharged after mark.
- 6. a kind of application method of processing unit for ship tail gas desulfurization wastewater according to claim 5, its feature It is：In a steps, waste water treatment tank top is equipped with and is attached thereto sodium hydroxide tank, flocculant tank and flocculation aid tank, sodium hydroxide Tank is connected by sodium hydroxide peristaltic pump with waste water treatment tank；Further, PH feedback devices are equipped with waste water treatment tank, sodium hydroxide is adjusted according to the numerical value of PH feedback devices offer The flow of peristaltic pump so that the pH value in waste water treatment tank is maintained at 7.5-8.5 scopes, and flocculant tank passes through flocculant peristaltic pump It is connected with waste water treatment tank, flocculation aid tank is connected by flocculation aid peristaltic pump with waste water treatment tank.
- 7. a kind of application method of processing unit for ship tail gas desulfurization wastewater according to claim 5, its feature It is：In b step, the plate compression motor spindle is equipped with bearing material pallet, and plate and frame filter press is equipped with water inlet and water outlet, into The mouth of a river is connected by pipeline with high pressure sludge pump, and water outlet is connected with drainpipe；The outlet of the high pressure sludge pump is equipped with three Logical, wherein being connected all the way by strainer valve with the water inlet of plate and frame filter press, another way passes through mixing circulation valve and wastewater treatment Groove is connected so that desulfurization wastewater is returned waste water treatment tank and is mixed, and makes the mixing of desulfurization wastewater and flocculation aid, flocculant Time >=10min.
- 8. a kind of application method of processing unit for ship tail gas desulfurization wastewater according to claim 5, its feature It is：In step c, ClO2The ClO of generator output2Tolerance be 0.8-1.2kg/h, pass through gas distributor so that desulfurization is given up Liquid and the ClO produced2Gas comes into full contact with.
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| CN201711432180.0A CN107986501A (en) | 2017-12-26 | 2017-12-26 | A kind of processing unit and its application method for ship tail gas desulfurization wastewater |
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| CN201711432180.0A CN107986501A (en) | 2017-12-26 | 2017-12-26 | A kind of processing unit and its application method for ship tail gas desulfurization wastewater |
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