CN208648942U - A kind of device based on persulfate processing desulfurization wastewater - Google Patents
A kind of device based on persulfate processing desulfurization wastewater Download PDFInfo
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- CN208648942U CN208648942U CN201820169715.3U CN201820169715U CN208648942U CN 208648942 U CN208648942 U CN 208648942U CN 201820169715 U CN201820169715 U CN 201820169715U CN 208648942 U CN208648942 U CN 208648942U
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Abstract
The utility model relates to a kind of devices based on persulfate processing desulfurization wastewater, belong to desulfurization wastewater process field.A kind of device based on persulfate processing desulfurization wastewater, including sequentially connected horizontal flow type grit chamber, potassium peroxydisulfate recombination reaction tank and secondary settling tank.Combination process described in the utility model based on persulfate processing desulfurization wastewater is in the COD degradation of high chlorine flue gas desulfurization waste-water, COD good purification to have reached 83.76% or more for the removal rate of COD, realizes the processing up to standard of desulfurization wastewater；And it is energy-efficient, by-product is few, environmentally protective.
Description
Technical field
The utility model relates to a kind of devices based on persulfate processing desulfurization wastewater, belong to desulfurization wastewater processing neck
Domain.
Background technique
Coal-burning power plant's wet desulphurization waste component is complicated, contains high concentration suspended matter, chloride ion, sulfate and a variety of heavy
Metal, and water is few, is most intractable waste water in power plant.Desulfurization wastewater mainly uses chemical precipitation method to handle at present, portion
Divide index difficulty up to standard, such as COD and heavy metal.Therefore, it in order to ensure desulfurization wastewater indices qualified discharge, avoids occurring
Environment Pollution Event, it is necessary to the efficient novel desulphurization wastewater processing technology of exploiting economy and equipment.Wherein, in existing wastewater treatment
Advanced treatment process appropriate is added in the end of system, can while ensuring qualified discharge, effectively avoid overlapping construction and
Reduce cost of investment.
In recent years, the advanced oxidation processing technique of waste water is fast-developing, is refractory wastewater and Sewage advanced treatment
Provide new selection.Fenton oxidation method is quickly grown, and mainly uses Fe2+/H2O2System aoxidizes gas chromatography.Fe2+Make
Make oxidant H for catalyst2O2A large amount of hydroxyl radical free radical is generated, to carry out oxidation of organic compounds, achievees the effect that the COD that degrades.It is fragrant
The major defect for the method for pausing is H2O2Utilization rate it is not high, cannot abundant mineralising organic matter.And ferrous coagulation can generate greatly
The sludge wadding body of amount, increases the cost of Treatment of Sludge.
It is later studies have shown that equally available using heterogeneous catalysis such as iron powders, because its react basic process with
Fenton reagent is similar and referred to as Fenton-like system.Further, since iron rust can be generated during the reflection of class Fenton, and
Iron rust has stronger adsorption effect for most of heavy metals.Therefore, depth is carried out to desulfurization wastewater using class Fenton process
Reason can achieve the effect that remove COD and heavy metal in waste water simultaneously.But at present using class Fenton process processing desulfurization wastewater
Research is rarely reported.The utility model is grasped using the combination technological method based on persulfate processing desulfurization wastewater as point of penetration
Core technology explores organic wastewater with difficult degradation thereby processing with high salt market actively.
Utility model content
To solve the above problems, the purpose of this utility model is to provide a kind of based on persulfate processing desulfurization wastewater
Device.
The purpose of this utility model is achieved through the following technical solutions:
A kind of device based on persulfate processing desulfurization wastewater, including sequentially connected horizontal flow type grit chamber, persulfuric acid
Potassium recombination reaction tank and secondary settling tank.
Further, the bottom of the horizontal flow type grit chamber is equipped with the first bed mud outlet, the first bed mud outlet
Connect sludge pump.
Further, agitating device is equipped in the horizontal flow type grit chamber.
Further, the connecting pipe of the horizontal flow type grit chamber and potassium peroxydisulfate recombination reaction tank is equipped with metering pump.
Further, the secondary settling tank bottom is equipped with the second bed mud outlet, and the second bed mud outlet connects taper
Sub-mud bucket, and the taper sub-mud bucket is arranged in secondary settling tank bottom.
The utility model has the following beneficial effects:
(1) combination process described in the utility model based on persulfate processing desulfurization wastewater is useless for high chlorine flue gas desulfurization
In the COD degradation of water, COD good purification has reached 83.76% or more for the removal rate of COD, has realized desulfurization wastewater
Processing up to standard；And it is energy-efficient, by-product is few, environmentally protective；
(2) potassium peroxydisulfate in the utility model and hydrogen peroxide play synergistic oxidation；
(3) iron filings in the utility model repeat resource utilization after purification of water quality；
(4) the utility model is easy to operate, low in cost, green non-pollution.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the device described in the utility model that desulfurization wastewater is handled based on persulfate；
Fig. 2 is to handle iron filings additive amount in the method for desulfurization wastewater based on persulfate to examine desulfurization wastewater COD after processing
Surveying result influences schematic diagram；
After hydrogen peroxide, potassium peroxydisulfate adding proportion are to processing in method of the Fig. 3 to handle desulfurization wastewater based on persulfate
Desulfurization wastewater COD testing result influences schematic diagram；
Fig. 4 is to handle iron filings partial size in the method for desulfurization wastewater based on persulfate to detect desulfurization wastewater COD after processing
As a result schematic diagram is influenced.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.
A kind of device based on persulfate processing desulfurization wastewater, as shown in Figure 1, including sequentially connected flat flow sand setting
Pond, potassium peroxydisulfate recombination reaction tank and secondary settling tank.
The bottom of the horizontal flow type grit chamber is equipped with the first bed mud outlet, and the first bed mud outlet connects sludge
Pump.Agitating device is equipped in the horizontal flow type grit chamber.
The connecting pipe of the horizontal flow type grit chamber and potassium peroxydisulfate recombination reaction tank is equipped with metering pump.
The secondary settling tank bottom is equipped with the second bed mud outlet, and the second bed mud outlet connects taper sub-mud bucket, and
The taper sub-mud bucket is arranged in secondary settling tank bottom.
A method of desulfurization wastewater is handled based on persulfate, comprising the following steps:
Step 1, desulfurization wastewater enters horizontal flow type grit chamber, and desulfurization wastewater COD is 1000~1500mg/L, chlorine ion concentration
For 8000~12000mg/L.Sodium hydroxide, PAM flocculant and EDTA complexing agent are added into the horizontal flow type grit chamber, rapidly
Natural sedimentation is stood after stirring, wherein the additive amount of sodium hydroxide is 2g/L, and the additive amount of flocculant is 1g/L, complexing agent
Additive amount is 2g/L.Desulfurization wastewater is set to carry out respectively obtaining supernatant and solid phase, solid phase is through the first bed mud outlet
Discharge, supernatant enter potassium peroxydisulfate recombination reaction tank through metering pump control；
It step 2, the use of the pH value that dilute hydrochloric acid or sodium hydroxide solution adjust supernatant is 8-9, Xiang Suoshu potassium peroxydisulfate is multiple
It closes and iron filings, potassium peroxydisulfate, hydrogen peroxide is added in reactor tank, it is anti-that supernatant carries out advanced oxidation in potassium peroxydisulfate recombination reaction tank
It answers, reduces taste, coloration and the COD value of desulfurization wastewater, obtain reaction mixture；
Wherein, the H being added in potassium peroxydisulfate recombination reaction tank2O2Mass concentration and COD ratio be 0.5:1~1:1,
The K of addition2S2O8Mass concentration and COD ratio be 1:1.1~1:1.6, iron filings and K2S2O8Mass ratio is 1:1.
Step 3, by the reaction mixture in step 2 be discharged into secondary settling tank carry out sedimentation assign to obtain supernatant and bed mud, on
Standard emission of clear, bed mud enter taper sub-mud bucket；
Step 4, the iron filings of taper sub-mud bucket bottom precipitation are recycled, taper sub-mud bucket top flocculation mud is transported outward into nothing
Evilization processing.
Method described in the utility model using solid phase class Fenton process processing desulfurization wastewater can pass through following experimental verification:
Embodiment 1:
Specific step is as follows:
(1) 2L desulfurization wastewater is measured, is added in 5L container, weighs 4gNaOH, 1g flocculant, 4g complexing agent is added to the container
It stirs evenly, quiescent setting 1h obtains supernatant.
(2) 100mL supernatant is measured using graduated cylinder, be added in 250mL conical flask.
(3) supernatant pH to 8~9 is adjusted using 0.05mol/L dilute hydrochloric acid and 0.05mol/L sodium hydroxide solution.
(4) weigh 90mg iron filings, 90mg potassium peroxydisulfate be added conical flask in, use 1mL liquid-transfering gun draw 0.45mL30%
Hydrogen peroxide is added in conical flask；
(5) conical flask is placed on water bath with thermostatic control shaking table and shakes 1h, COD is substantially degraded.
(6) conical flask is taken out, static 2h is down to 80mg/L, reaches until taking supernatant through detecting COD value after supernatant clarification
Mark.
(7) supernatant in conical flask is filtered off, upper layer bed mud is swept off, pours out lower layer's iron filings, it is reusable.
Embodiment 2:
Specific step is as follows:
(1) 2L desulfurization wastewater is measured, is added in 5L container, weighs 4gNaOH, 1g flocculant, 4g complexing agent is added to the container
It stirs evenly, quiescent setting 1h obtains supernatant.
(2) 100mL supernatant is measured using graduated cylinder, be added in 250mL conical flask.
(3) supernatant pH to 8~9 is adjusted using 0.05mol/L dilute hydrochloric acid and 0.05mol/L sodium hydroxide solution.
(4) weigh 90mg iron filings, 90mg potassium peroxydisulfate be added conical flask in, use 1mL liquid-transfering gun draw 0.35mL30%
Hydrogen peroxide is added in conical flask；
(5) conical flask is placed on water bath with thermostatic control shaking table and shakes 1h, COD is substantially degraded.
(6) conical flask is taken out, static 2h is down to 90mg/L, reaches until taking supernatant through detecting COD value after supernatant clarification
Mark.
(7) supernatant in conical flask is filtered off, upper layer bed mud is swept off, pours out lower layer's iron filings, it is reusable.
Embodiment 3:
Specific step is as follows:
(1) 2L desulfurization wastewater is measured, is added in 5L container, weighs 4gNaOH, 1g flocculant, 4g complexing agent is added to the container
It stirs evenly, quiescent setting 1h obtains supernatant.
(2) 100mL supernatant is measured using graduated cylinder, be added in 250mL conical flask.
(3) supernatant pH to 8~9 is adjusted using 0.05mol/L dilute hydrochloric acid or 0.05mol/L sodium hydroxide solution.
(4) weigh 90mg iron filings, 180mg potassium peroxydisulfate be added conical flask in, use 1mL liquid-transfering gun draw 0.5mL30%
Hydrogen peroxide is added in conical flask；
(5) conical flask is placed on water bath with thermostatic control shaking table and shakes 1h, COD is substantially degraded.
(6) conical flask is taken out, static 2h is down to 280mg/L, not until taking supernatant through detecting COD value after supernatant clarification
It is up to standard.
(7) supernatant in conical flask is filtered off, upper layer bed mud is swept off, pours out lower layer's iron filings, it is reusable.
Fig. 2 be it is described in the utility model based on persulfate handle desulfurization wastewater method in iron filings additive amount to processing after
Desulfurization wastewater COD testing result influences schematic diagram.There it can be seen that H2O2+K2S2O8The drop-out value of the COD of group is maximum, secondly
Respectively K2S2O8Group, H2O2Group.This shows single H2O2Or K2S2O8Class Fenton's reaction have to the removal of desulfurization wastewater organic matter
Certain effect, but combine H2O2And K2S2O8Ground class Fenton's reaction can be really significantly improved to imitate the removal of desulfurization wastewater organic matter
Fruit.Also demonstrate H2O2And K2S2O8The mutual synergistic effect in class Fenton's reaction.
Fig. 3 is that hydrogen peroxide, potassium peroxydisulfate add in the method described in the utility model based on persulfate processing desulfurization wastewater
Ratio is added to influence schematic diagram to desulfurization wastewater COD testing result after processing, wherein the hydrogen peroxide, potassium peroxydisulfate adding proportion
For H2O2And K2S2O8Mass ratio.Work as H2O2:K2S2O8When=1:2, reaction system is best to the degradation effect of COD, and H2O2:
K2S2O8When=2:1, i.e., in H2O2In excessive situation, the degradation effect of COD is simultaneously bad, shows H2O2And K2S2O8Coexist
In system, H2O2Excessively the effect of concerted reaction can be made undesirable.
Fig. 4 is that iron filings example diameter takes off to after processing in the method described in the utility model based on persulfate processing desulfurization wastewater
Sulphur waste water COD testing result influences schematic diagram.When Fe amount is few, the Fe of 100nm handles the effect of COD most to class Fenton's reaction
Good, the COD degradation effect of 2mm, 50mm are successively successively decreased, and illustrate that Fe partial size is smaller when Fe amount is few, hydrogen peroxide and potassium peroxydisulfate join
The effect for closing processing is better.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (3)
1. a kind of device based on persulfate processing desulfurization wastewater, which is characterized in that including sequentially connected flat flow sand setting
Pond, potassium peroxydisulfate recombination reaction tank and secondary settling tank；
Agitating device is equipped in the horizontal flow type grit chamber；The connection of the horizontal flow type grit chamber and potassium peroxydisulfate recombination reaction tank
Pipeline is equipped with metering pump.
2. the device according to claim 1 based on persulfate processing desulfurization wastewater, which is characterized in that the flat flow
The bottom of setting pot is equipped with the first bed mud outlet, and the first bed mud outlet connects sludge pump.
3. the device according to claim 1 based on persulfate processing desulfurization wastewater, which is characterized in that the secondary settling tank
Bottom is equipped with the second bed mud outlet, and the second bed mud outlet connects taper sub-mud bucket, and the taper sub-mud bucket is arranged
In secondary settling tank bottom.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108046483A (en) * | 2018-01-31 | 2018-05-18 | 大唐环境产业集团股份有限公司 | A kind of device and method based on persulfate processing desulfurization wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108046483A (en) * | 2018-01-31 | 2018-05-18 | 大唐环境产业集团股份有限公司 | A kind of device and method based on persulfate processing desulfurization wastewater |
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