CN109718803A - A kind of catalyst and its preparation, application method for handling waste water nbsCOD - Google Patents
A kind of catalyst and its preparation, application method for handling waste water nbsCOD Download PDFInfo
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- CN109718803A CN109718803A CN201910218587.6A CN201910218587A CN109718803A CN 109718803 A CN109718803 A CN 109718803A CN 201910218587 A CN201910218587 A CN 201910218587A CN 109718803 A CN109718803 A CN 109718803A
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Abstract
The catalyst and its preparation, application method that the invention discloses a kind of for handling waste water nbsCOD, belong to catalyst technical field.The catalyst activity component for including ρ-aluminium oxide and be supported on ρ-alumina support of the invention, the catalyst activity component are metal oxide；And the quality of catalyst activity component is ρ-quality of alumina 2-10%.Catalyst of the invention can be improved the effect of catalytic ozonation degradation nbsCOD, be CO by the organic matter exhaustive oxidation that conventional oxidant, ozone and chlorine etc. are unable to oxygenolysis2And H2O, or change molecular structure and converting small organic molecule for larger molecular organics, improve the biodegradability of waste water.
Description
Technical field
The invention belongs to catalyst technical fields, more specifically to a kind of for handling the catalysis of waste water nbsCOD
Agent and its preparation, application method.
Background technique
As Environmental Protection Situation is increasingly severe, the requirement to sewage disposal plant effluent water quality is gradually increased.But due to
The presence of nbsCOD, makes effluent quality be difficult to qualified discharge；More and more sewage treatment plants increase advanced treatment unit thus；
But since nbsCOD is difficult through two stage treatment and dosing filtering removal, conventional biochemical treatment and advanced treating combine work
Skill water outlet COD is extremely difficult to 30mg/L or less.Therefore, how to realize that nbsCOD's effectively removes asking as current urgent need to resolve
Topic.
Catalytic ozonation technology is developed in recent years a kind of to improve ozone utilization efficiency, enhancing ozone oxidation
Ability is purpose high-level oxidation technology, and catalytic ozonation method not only has oxidability strong, to deodorization, decoloration, sterilization, removal
The all apparent effect of organic matter；And the ozone in processed waste water easily decomposes, and does not generate secondary pollution, and the preparation phase of ozone
To fairly simple；So that catalytic ozonation technical operation advantage of lower cost, therefore catalytic ozonation is by sewage treatment
The favor of researcher.Applicant has carried out in the field to be studied earlier, and has delivered " ozone catalytic oxygen in advanced treatment of wastewater
Change the research of nbsCOD key technology ".
Catalytic ozonation is mainly that the surface characteristic of catalyst is utilized to strengthen ozone degradation processing chemical structure complexity, hardly possible
With the organic pollutant being biodegradable；The master of the removal to pollutant (mainly nbsCOD) may be implemented in catalytic ozonation
Want step are as follows: mass transfer-absorption-reaction-desorption-mass transfer, wherein inhale attached (de-), reaction, the speed of mass transfer and efficiency and just determine
Oxidability and efficiency of the ozone to pollutant.Mainly determined by substrate specifically, inhaling (de-) attached performance, the efficiency of reaction by
The catalytic performance of catalyst effective component determines.Currently, the oxidation efficiency and ability of existing ozone catalytic are limited, therefore, seek
Seeking the catalyst of excellent catalytic effect, low-cost catalytic ozonation nbsCOD is particularly important.
Through retrieving, the title of innovation and creation are as follows: the catalyst of COD and its preparation in a kind of ozone heterocatalysis oxidized waste water
Method (application number: 2017-12-19；The applying date: 201711374111.9), using MCM-41 microballoon molecular sieve as carrier, with Al and
Fe, Mn or Ce thrin are active component, and the presoma of catalyst active component is nitrate, acetate or chloride.It should
Invention prepares multi-element metal oxide loaded catalyst using infusion process.Catalyst activity of the present invention is high, effectively improves
The efficiency of COD in ozone removal waste water, but it is limited for the catalytic elimination effect of nbsCOD.
In addition, catalyst of COD and preparation method thereof (application number 2014-12- in a kind of ozone heterocatalysis oxidized waste water
04；The applying date: 201410726364.8) one or more metal catalytic oxidation objects and inorganic material and organic material are used,
It is prepared through mixing, molding, drying, sintering process.Porosity ozone catalyst prepared by the present invention is applied to containing organic
Organic molecule in waste such as COD waste water has the characteristics that the oxidation of highly selective and efficient ozone.The catalyst has COD
Preferable removal effect, but it is limited for the catalytic elimination effect of nbsCOD.Therefore, it is badly in need of developing a kind of novel for locating
Manage the catalyst of waste water nbsCOD.
Summary of the invention
1. to solve the problems, such as
For the problem poor to the effect of nbsCOD in catalytic ozonation waste water of catalyst in the prior art, provide
A kind of catalyst and its preparation, application method for handling waste water nbsCOD；Wherein
Offer it is a kind of for handling the catalyst of waste water nbsCOD, using ρ-aluminium oxide as carrier, using metal oxygen
Compound can be improved the effect of catalytic ozonation degradation nbsCOD, reduce ozone oxidation as catalyst active component
Ozone amount needed for nbsCOD；
Offer it is a kind of for handling the preparation method of the catalyst of waste water nbsCOD, urged using what this method was prepared
Under the premise of agent guarantees granule strength, the load capacity of suitable metal oxide is provided, ozone oxidation catalyst is conducive to
Stabilization, the equably nbsCOD in removal sewage, can be improved the effect of catalytic ozonation degradation nbsCOD；
The method of nbsCOD in the catalytic ozonation removal sewage of offer, can be improved catalytic ozonation degradation
The effect of nbsCOD.
2. technical solution
It is of the invention a kind of for handling the catalyst of waste water nbsCOD, including ρ-aluminium oxide and it is supported on ρ-carrying alumina
Catalyst activity component on body, the catalyst activity component are metal oxide；And the quality of catalyst activity component is
ρ-quality of alumina 2-10%.
Preferably, the metal oxide is the mixture or cerium oxide of iron oxide perhaps cobalt oxide and manganese oxide
With the mixture of the mixture or iron oxide of iron oxide, cobalt oxide and manganese oxide.
Preferably, metal oxide is the mixture of cobalt oxide and manganese oxide, and the mass percentage of cobalt oxide is 30-
70%；Or metal oxide is the mixture of cerium oxide and iron oxide, the mass percentage of iron oxide is 20-80%；Or
Person's metal oxide is the mixture of iron oxide, cobalt oxide and manganese oxide, and the mass percentage of cobalt oxide is 10-50%.
Of the invention is a kind of for handling the preparation method of the catalyst of waste water nbsCOD, by catalyst carrier and catalyst
Activated feedstock carries out combination drying, obtains mixed material；It will be added in pelletizer after mixed material pulverization process, add silicon
Sol solution carries out granulation processing, prepares catalyst preformed particles；After catalyst preformed particles are carried out calcination processing, obtain into
Product catalyst.
Preferably, S100, raw material mixing fine grinding
Catalyst carrier and catalyst activity raw material are first subjected to combination drying, obtain mixed material, wherein catalyst carries
Body is ρ-aluminium oxide；Ball milling mixing is carried out using ball mill, obtains mixing fines；
S200, catalyst preformed particles
Mixing fines is added in pelletizer, addition silicon sol solution carries out granulation processing to mixing fines, has been granulated
Catalyst preformed particles are obtained after；
S300, catalyst calcination processing
Calcination processing, catalyst activity feed oxygen during calcining are carried out to the above-mentioned catalyst preformed particles that are prepared
Oxide is turned to, and generates catalyst activity component, obtains finished catalyst.
Preferably, metal oxide is molysite；Or metal oxide is the mixture of cobalt salt and manganese salt；Or metal oxygen
Compound is the mixture of cerium salt and molysite；Or metal oxide is the mixture of molysite, cobalt salt and manganese salt.
Preferably, catalyst carrier and catalyst activity raw material are mixed using ball grinder in S100 step.
Preferably, the additive amount of silicon sol solution is the 3-15% for mixing fines quality in S200 step；And silica solution is molten
The mass percentage concentration of silica solution is 5-25% in liquid.
Preferably, it is characterised in that: the calcination temperature in S300 step is 400-800 DEG C, and the heating speed of calcination processing
Rate is 1-10 DEG C/min.
Preferably, catalyst is added in sewage, and is passed through ozone into sewage, ozone concentration is 4~5mg/L；It is logical
Cross the nbsCOD in ozone oxidation removal sewage.
3. beneficial effect
Compared with the prior art, the invention has the benefit that
(1) of the invention a kind of for handling the catalyst of waste water nbsCOD, using ρ-aluminium oxide as carrier, ρ-oxidation
Aluminium large specific surface area provides more attachment site for active component, increases the contact area of ozone and metal oxide,
Improve ozone catalytic efficiency；On this basis, the present invention can be improved using metal oxide as catalyst active component
The effect of catalytic ozonation degradation nbsCOD, ozone amount needed for reducing ozone oxidation nbsCOD significantly reduce operating cost.It is special
It is other, on the basis of catalyst provided by the invention, using catalytic ozonation technology, by conventional oxidant, ozone and chlorine
It is CO etc. the organic matter exhaustive oxidation for being unable to oxygenolysis2And H2O, or it is organic by converting small molecule for larger molecular organics
Object and change molecular structure, improve the biodegradability of waste water.
(2) method of the nbsCOD in catalytic ozonation of the invention removal sewage, catalyst are made using ρ-aluminium oxide
For carrier, ρ-aluminium oxide large specific surface area provides more attachment site for active component, increases ozone and metal aoxidizes
The contact area of object, while using metal oxide as catalyst active component, with the efficient combination of different metal ingredient, shape
At the active component with high catalytic performance, the effect of catalytic ozonation degradation nbsCOD can be improved, so as to pass through
Subsequent biochemical reaction realizes the low cost removal of COD, realizes the qualified discharge of sewage.
Detailed description of the invention
Fig. 1 is of the invention a kind of for handling the flow chart of the preparation method of the catalyst of waste water nbsCOD；
Fig. 2 is that embodiment 1 is iron-based for handling the scanning electron microscope of the catalyst of waste water nbsCOD；
Fig. 3 is the scanning electron microscope for the catalyst that 2 cobalt manganese base of embodiment is used to handle waste water nbsCOD；
Fig. 4 is the scanning electron microscope for the catalyst that 5 iron cerium base of embodiment is used to handle waste water nbsCOD；
Fig. 5 is the scanning electron microscope for the catalyst that 8 iron cobalt manganese base of embodiment is used to handle waste water nbsCOD.
Specific embodiment
Hereafter to the detailed description of exemplary embodiment of the present invention with reference to attached drawing, although these exemplary embodiment quilts
Sufficiently describe in detail so that those skilled in the art can implement the present invention, it is to be understood that can realize other embodiments and
Can without departing from the spirit and scope of the present invention to the present invention various changes can be made.Hereafter to the embodiment of the present invention
More detailed description is not limited to required the scope of the present invention, and just to be illustrated and do not limit pair
The description of the features of the present invention and feature to propose to execute best mode of the invention, and is sufficient to make those skilled in the art
It can implement the present invention.Therefore, the scope of the invention is only defined by the appended claims.
Of the invention is a kind of for handling the catalyst of waste water nbsCOD, it is characterised in that: including ρ-aluminium oxide and load
Catalyst activity component on ρ-alumina support, the catalyst activity component are metal oxide；And catalyst activity
The quality of component is ρ-carrying alumina weight 2-10%.
Using ρ-aluminium oxide as carrier, the ρ-aluminium oxide large specific surface area is provided more attached for active component
Site, increase the contact area of ozone and metal oxide, improve ozone catalytic efficiency；Meanwhile ρ-aluminium oxide itself
With certain catalytic activity, the ozone that can be dissolved in water is adsorbed onto its surface, and ozone is promoted to be decomposed into oxidisability more
Strong hydroxyl radical free radical improves COD removal rate.
Wherein, metal oxide can be iron oxide, and using molysite as catalyst activity raw material, catalyst activity component is
The iron oxide generated by catalyst activity raw material in calcination process, molysite in ferric oxalate, ferric nitrate, iron chloride at least one
Kind.
In addition, metal oxide can be the mixture of cobalt oxide and manganese oxide, and the quality percentage for controlling cobalt oxide contains
Amount is 30-70%, i.e., it is 30-70% that cobalt oxide, which accounts for the mass percent of metal oxide,；Made with cobalt salt and the mixture of manganese salt
For catalyst activity raw material, cobalt oxide and manganese oxide are generated by cobalt salt and the mixture of manganese salt in calcining, and cobalt salt can be selected from but not
It is limited at least one of cobalt oxalate, cobalt nitrate, cobalt chloride；Manganese salt may be selected from but not limited to manganese oxalate, manganese nitrate, in manganese chloride
At least one.
Metal oxide can be the mixture of cerium oxide and iron oxide, and the mass percentage for controlling iron oxide is
The mass percent that 20-80%, i.e. iron oxide account for metal oxide is 30-70%；Using the mixture of cerium salt and molysite as urging
Agent activated feedstock, cerium oxide and iron oxide are generated by the mixture of cerium salt and molysite in calcining, and molysite may be selected from but not limited to
At least one of ferric oxalate, ferric nitrate, iron chloride, and cerium salt may be selected from but not limited to cerium oxalate, cerous nitrate, in cerium chloride
It is at least one.
It is combined using the different proportion of metal oxide as active component, is not only due to all have one as independent component
Fixed catalytic performance, can be with the catalytic effect of fortifying catalytic agent after combination, and metal composite oxide can form stabilization
Structural system, its turnover rate is reduced when catalyst enters and uses for a long time in water, to prolong the service life.
Metal oxide can be iron oxide, the mixture of cobalt oxide and manganese oxide, and the mass percentage of cobalt oxide
For 10-50%；That is the quality of control cobalt oxide accounts for the 10-50% of the total weight of iron oxide, cobalt oxide and manganese oxide mixture, together
The quality of time control oxygenerating iron accounts for the 20-60% of the total weight of iron oxide, cobalt oxide and manganese oxide mixture.Cobalt salt can be selected from but
It is not limited at least one of cobalt oxalate, cobalt nitrate, cobalt chloride；The manganese salt may be selected from but not limited to manganese oxalate, manganese nitrate, chlorine
Change at least one of manganese；The molysite may be selected from but not limited at least one of ferric nitrate, ferric carbonate, iron chloride.
It is worth noting that, various salt have mass change during generating oxide during calcining, therefore
The dosage of salt is calculated according to the relative scale of oxide in catalyst and is obtained.
Active component of the present invention using metal oxide as catalyst has preferable catalytic efficiency, can efficiently urge
Change oxidation, the ozone amount of ozone oxidation nbsCOD is greatly reduced.Using catalytic ozonation technology, by conventional oxidant, ozone
The organic matter exhaustive oxidation for being unable to oxygenolysis with chlorine etc. is CO2And H2O, or by converting small molecule for larger molecular organics
Organic matter and change molecular structure, improve the biodegradability of waste water, by subsequent biochemical reaction realize COD low cost go
It removes, realizes qualified discharge.
Of the invention is a kind of for handling the preparation method of the catalyst of waste water nbsCOD, by catalyst carrier and catalyst
Activated feedstock carries out combination drying, obtains mixed material；It will be added in pelletizer after mixed material pulverization process, add silicon
Sol solution carries out granulation processing, prepares catalyst preformed particles；After catalyst preformed particles are carried out calcination processing, obtain into
Product catalyst.Specific step is as follows:
S100, raw material mixing fine grinding
First by ρ-aluminium oxide and catalyst activity raw material as in container, and suitable water is added, places into ball grinder
It is mixed, is dried after the completion of mixing, wherein the temperature being dried is 80-150 DEG C, obtain mixed material；It is right
Mixed material carries out pulverization process, then carries out ball milling fine grinding, drum's speed of rotation 200-500r/min, when ball milling using ball mill
Between be 10-300min, not only contribute to the fully dispersed of catalyst activity raw material, and be conducive to catalyst activity raw material is equal
Disperse evenly on a catalyst support, the mixing fines of dispersed system, and the mixing obtained are obtained after the completion of mixing and ball milling
Thin material granularity≤300 mesh.The dynamics for mixing fines is smaller, and specific surface area is bigger, so that the composite catalyst is with larger
Specific surface area, be conducive to improve catalytic activity, and then improve catalytic efficiency.
S200, catalyst preformed particles
Mixing fines is added in pelletizer, addition binder solution carries out granulation processing, binder to mixing fines
Solution is silicon sol solution, and pelletizer revolving speed is 10-50r/min, and binder solution is equably sprayed at using spray pattern
Fines surface is mixed, prevents a large amount of silicon sol solution aggregation from causing mixing fines package tight, is catalyzed after the completion of being granulated
Agent preformed particles；The mass percentage concentration of silica solution is 5-25% in silicon sol solution, this is because if the quality of silica solution
Percentage concentration is excessively high, and adhesive property is preferable, and the molding of catalyst becomes easy, and is easy to sinter into during subsequent calcination solid
Sphere；It is easy to form if silica solution dosage is more for the dosage of silica solution, but subsequent calcination leads to catalyst duct Zhong Dui
Long-pending silicone content excessively then results in blockage, and reduces catalytic performance instead；If silica solution dosage is very few, not only molding becomes hardly possible even
It can not form, and in a large amount of decomposable processes of pore former high temperature, not can guarantee effectively strength support, be easy to cause catalyst
Though the porosity is high, the intensity of catalyst is lower, so that the service life of catalyst is poor.
In addition, i.e. silica solution is molten it is worth noting that the additive amount of silicon sol solution is the 3-15% for mixing fines quality
The additive amount of liquid is the 3-15% of catalyst carrier and catalyst activity total mass of raw material.If the adding too much of silica solution, silicon
Colloidal sol is easy to be wrapped in mixing fines surface, so that mixing fines is closed after calcination processing, it can not be with sewage to be processed
Contact, to cannot be removed effectively the nbsCOD in sewage；And when the additive amount deficiency of the silica solution mixes fines quality amount
5% when, since caking property is weaker, be unfavorable for catalyst and the molding of ρ-alumina support, cause catalyst granules intensity drop
It is low, it is easily broken under hydraulic pressure, so as to cause secondary pollution to water body.
Catalyst active component catalyst preformed particles uniform in size, that roundness is high, catalyst are obtained after the completion of being granulated
The partial size of preformed particles can according to need the catalyst granules of selection different-grain diameter between 3-9mm, such as 3-5mm,
4-6mm, 6-8mm, 7-9mm etc..Catalyst preformed particles are after further calcining, and obtained catalyst particle size size is suitable, both
Will not be too small because of partial size, cause filling excessively fine and close and influences clean effect, even blocks；It will not be because of filling rate
Low, filler gap reduces clean effect greatly.
S300, catalyst calcination processing
Calcination processing carried out to the above-mentioned catalyst preformed particles that are prepared, the heating rate of calcination processing is 1-10 DEG C/
Min, calcination temperature are 450-800 DEG C, and calcination time 4-6h, catalyst activity raw material is oxidized to oxidation during calcining
Object, and generate catalyst activity component, catalyst granules wash during removal calcination processing other after calcining, using ultrasound
The surface dust that impurity carbonization generates.Wherein, the intensity of catalyst not only can be improved in calcining；And catalyst can be made living
Property component occur crystal transfer so that catalyst activity component is more secured in conjunction with catalyst carrier, especially by slow
Heating can preferably improve the firmness between catalyst strength and catalyst active component and carrier.
Calcination time control is 1-8h the reason is that, if the temperature of calcination processing is excessively high or overlong time, carrier ρ-
Crystal transfer can occur for aluminium oxide, then influences specific surface, reduce decontamination activity；If the temperature of the calcination processing is too low or the time
It is too short, then it can not increase the intensity of catalyst by sintering and improve the firmness between catalyst active component and carrier.Into
One step is preferred, and the heating rate of the calcination processing is 2-10 DEG C/min, can preferably improve catalysis by slowly heating up
Firmness between agent intensity and catalyst active component and carrier.
Embodiment 1
One kind of the present embodiment is iron-based for handling the preparation method of the catalyst of waste water nbsCOD, the specific steps are as follows:
S100, carrier are mixed with active component in fine grinding ball grinder
Using molysite as catalyst activity raw material, ρ-aluminium oxide, molysite are placed in container, and suitable quantity of water is added, is put into
Ball milling mixing in ball grinder, mixes well it, is then placed in drying box in 90 DEG C of dryings, obtains mixed material；After drying
Mixed material crushed with crusher, be placed in levigate in ball mill, coal dust added into mixed material as pore creating material,
The additive amount of coal dust is the 5% of the ρ-quality of alumina, is uniformly mixed so as to obtain granularity≤300 mesh mixing fines.Wherein, ball mill
Revolving speed is 400r/min, Ball-milling Time 50min, and mixing fines dispersion is obtained after ball milling；
S200, catalyst prefabricated grain
Mixing fines is added in pelletizer, silicon sol solution is sprayed at mixing fines surface and carries out granulation processing,
Wherein the fountain height of silicon sol solution is mix fines gross mass 12%, and the concentration of silica solution is 12% in silicon sol solution,
Pelletizer revolving speed is 30r/min；It is 3-5mm catalyst preformed particles that partial size is obtained after the completion of being granulated；
S300, catalyst calcination
The above-mentioned catalyst preformed particles that are prepared are subjected to calcination processing, the calcination temperature of catalyst is 500 DEG C, calcining
Time is 360min, and catalyst ultrasonic washing instrument oscillation cleaning is removed surface micro mist after the completion of calcining, is then added to
In drying box, the iron-based catalyst for being used to handle waste water nbsCOD is dried to obtain at 110 DEG C, the catalyst of the present embodiment is swept
It is as shown in Figure 2 to retouch Electronic Speculum.
The iron-based high porosity catalyst of the present embodiment, by addition coal dust as pore creating material, under the conditions of high-temperature calcination
The volatilization of organic matter, increases catalyst porosity in coal dust；Meanwhile catalyst uses iron oxide as active component, makes to mention
High catalytic effect of the catalyst to sewage, further increases catalytic activity.
Embodiment 2
A kind of cobalt manganese base of the present embodiment is used to handle the preparation method of the catalyst of waste water nbsCOD, and specific steps are such as
Under:
S100, carrier are mixed with active component in fine grinding ball grinder
Using cobalt salt and manganese salt as catalyst activity raw material, and aluminium oxide is accounted for according to the total amount of cobalt oxide and manganese oxide
3% ratio weighs cobalt salt and manganese salt；The mixture of ρ-aluminium oxide, cobalt salt and manganese salt is placed in container, and suitable quantity of water is added
It is put into ball milling mixing in ball grinder, is put into drying box and is dried to obtain mixed material in 90 DEG C；Mixed material after drying is used broken
Broken machine is crushed, and is placed in levigate in ball mill, is uniformly mixed so as to obtain granularity≤300 mesh mixing fines.Wherein, drum's speed of rotation
For 400r/min, Ball-milling Time 20min obtains mixing fines dispersion after ball milling；It is worth noting that: cobalt salt and manganese salt
The ratio of raw material meets, and the quality of cobalt oxide is cobalt oxide, manganese oxide gross mass in the active component of catalyst after firing
60%.
S200, catalyst prefabricated grain
Mixing fines is added in pelletizer, silicon sol solution is sprayed at mixing fines surface and carries out granulation processing,
Wherein the fountain height of silicon sol solution is mix fines gross mass 8%, and the concentration of silica solution is 18% in silicon sol solution, is made
Grain machine revolving speed is 10-40r/min；It is 3-5mm catalyst preformed particles that partial size is obtained after the completion of being granulated；
S300, catalyst calcination
The above-mentioned catalyst preformed particles that are prepared are subjected to calcination processing, the calcination temperature of catalyst is 550 DEG C, calcining
Time is 2h, and catalyst ultrasonic washing instrument oscillation cleaning is removed surface micro mist after the completion of calcining, is then added to drying
In case, cobalt manganese base is dried to obtain at 150 DEG C for handling the catalyst of waste water nbsCOD, the scanning of the catalyst of the present embodiment
Electronic Speculum is as shown in Figure 3.
Embodiment 3
A kind of cobalt manganese base of the present embodiment is used to handle the preparation method of the catalyst of waste water nbsCOD, and specific steps are such as
Under:
S100, carrier are mixed with active component in fine grinding ball grinder
Using cobalt salt and manganese salt as catalyst activity raw material, and aluminium oxide is accounted for according to the total amount of cobalt oxide and manganese oxide
5% ratio weighs cobalt salt and manganese salt；The mixture of ρ-aluminium oxide, cobalt salt and manganese salt is placed in container, and suitable quantity of water is added
It is put into ball milling mixing in ball grinder, is put into drying box and is dried to obtain mixed material in 100 DEG C；Mixed material after drying is used broken
Broken machine is crushed, and is placed in levigate in ball mill, is uniformly mixed so as to obtain granularity≤300 mesh mixing fines.Wherein, drum's speed of rotation
For 300r/min, Ball-milling Time 40min obtains mixing fines dispersion after ball milling；It is worth noting that: cobalt salt and manganese salt
The ratio of raw material meets, and the quality of cobalt oxide is cobalt oxide, manganese oxide gross mass in the active component of catalyst after firing
50%.
S200, catalyst prefabricated grain
Mixing fines is added in pelletizer, silicon sol solution is sprayed at mixing fines surface and carries out granulation processing,
Wherein the fountain height of silicon sol solution is mix fines gross mass 10%, and the concentration of silica solution is 15% in silicon sol solution,
Pelletizer revolving speed is 20r/min；It is 4-6mm catalyst preformed particles that partial size is obtained after the completion of being granulated；
S300, catalyst calcination
The above-mentioned catalyst preformed particles that are prepared are subjected to calcination processing, the calcination temperature of catalyst is 500 DEG C, calcining
Time is 4h, and catalyst ultrasonic washing instrument oscillation cleaning is removed surface micro mist after the completion of calcining, is then added to drying
In case, cobalt manganese base is dried to obtain at 100 DEG C for handling the catalyst of waste water nbsCOD.
Embodiment 4
A kind of cobalt manganese base of the present embodiment is used to handle the preparation method of the catalyst of waste water nbsCOD, and specific steps are such as
Under:
S100, carrier are mixed with active component in fine grinding ball grinder
Using cobalt salt and manganese salt as catalyst activity raw material, and aluminium oxide is accounted for according to the total amount of cobalt oxide and manganese oxide
8% ratio weighs cobalt salt and manganese salt；The mixture of ρ-aluminium oxide, cobalt salt and manganese salt is placed in container, and suitable quantity of water is added
It is put into ball milling mixing in ball grinder, is put into drying box and is dried to obtain mixed material in 120 DEG C；Mixed material after drying is used broken
Broken machine is crushed, and is placed in levigate in ball mill, is uniformly mixed so as to obtain granularity≤300 mesh mixing fines.Wherein, drum's speed of rotation
For 400r/min, Ball-milling Time 30min obtains mixing fines dispersion after ball milling；It is worth noting that: cobalt salt and manganese salt
The ratio of raw material meets, and the quality of cobalt oxide is cobalt oxide, manganese oxide gross mass in the active component of catalyst after firing
40%.
S200, catalyst prefabricated grain
Mixing fines is added in pelletizer, silicon sol solution is sprayed at mixing fines surface and carries out granulation processing,
Wherein the fountain height of silicon sol solution is mix fines gross mass 12%, and the concentration of silica solution is 10% in silicon sol solution,
Pelletizer revolving speed is 35r/min；It is 5-7mm catalyst preformed particles that partial size is obtained after the completion of being granulated；
S300, catalyst calcination
The above-mentioned catalyst preformed particles that are prepared are subjected to calcination processing, the calcination temperature of catalyst is 480 DEG C, calcining
Time is 3.5h, and catalyst ultrasonic washing instrument oscillation cleaning is removed surface micro mist after the completion of calcining, is then added to dry
In dry case, cobalt manganese base is dried to obtain at 120 DEG C for handling the catalyst of waste water nbsCOD.
Embodiment 5
A kind of iron cerium base of the present embodiment is used to handle the preparation method of the catalyst of waste water nbsCOD, and specific steps are such as
Under:
S100, carrier are mixed with active component in fine grinding ball grinder
Using molysite and cerium salt as catalyst activity raw material, and ρ-aluminium oxide is accounted for according to the total amount of iron oxide and cerium oxide
3% ratio weighs the mixture of molysite and cerium salt；The mixture of ρ-aluminium oxide, molysite and cerium salt is placed in container, and is added
Enter suitable quantity of water and be put into ball milling mixing in ball grinder, is put into drying box and is dried to obtain mixed material in 120 DEG C；Mixing after drying
Material is crushed with crusher, is placed in levigate in ball mill, is uniformly mixed so as to obtain granularity≤300 mesh mixing fines.Wherein, ball
Mill speed is 400r/min, Ball-milling Time 20min, and mixing fines dispersion is obtained after ball milling；It is worth noting that: iron
The ratio of salt and cerium salt raw material meets, and the quality of cerium oxide is iron oxide and cerium oxide in the active component of catalyst after firing
The 60% of gross mass.
S200, catalyst prefabricated grain
Mixing fines is added in pelletizer, silicon sol solution is sprayed at mixing fines surface and carries out granulation processing,
Wherein the fountain height of silicon sol solution is mix fines gross mass 8%, and the concentration of silica solution is 18% in silicon sol solution, is made
Grain machine revolving speed is 10-50r/min；It is 3-5mm catalyst preformed particles that partial size is obtained after the completion of being granulated；
S300, catalyst calcination
The above-mentioned catalyst preformed particles that are prepared are subjected to calcination processing, the calcination temperature of catalyst is 500 DEG C, calcining
Catalyst ultrasonic washing instrument oscillation cleaning is removed into surface micro mist after the completion, is then added in drying box, at 150 DEG C
Iron cerium base is dried to obtain for handling the catalyst of waste water nbsCOD, the scanning electron microscope of the catalyst of the present embodiment is as shown in Figure 4.
The embodiment of the present invention uses ρ-aluminium oxide as carrier, using the mixture of cerium oxide and iron oxide as catalytic activity
The composite catalyst of substance, density 0.8-1.2g/cm3, water absorption rate 50-80%, porosity 55-85% are conducive to
Improve nbsCOD removal efficiency in advanced treatment of wastewater.
Embodiment 6
A kind of iron cerium base of the present embodiment is used to handle the preparation method of the catalyst of waste water nbsCOD, and specific steps are such as
Under:
S100, carrier are mixed with active component in fine grinding ball grinder
Using molysite and cerium salt as catalyst activity raw material, and ρ-aluminium oxide is accounted for according to the total amount of iron oxide and cerium oxide
5% ratio weighs the mixture of molysite and cerium salt；The mixture of ρ-aluminium oxide, molysite and cerium salt is placed in container, and is added
Enter suitable quantity of water and be put into ball milling mixing in ball grinder, is put into drying box and is dried to obtain mixed material in 100 DEG C；Mixing after drying
Material is crushed with crusher, is placed in levigate in ball mill, is uniformly mixed so as to obtain granularity≤300 mesh mixing fines.Wherein, ball
Mill speed is 300r/min, Ball-milling Time 30min, and mixing fines dispersion is obtained after ball milling；It is worth noting that: iron
The ratio of salt and cerium salt raw material meets, and the quality of cerium oxide is iron oxide and cerium oxide in the active component of catalyst after firing
The 50% of gross mass.
S200, catalyst prefabricated grain
Mixing fines is added in pelletizer, silicon sol solution is sprayed at mixing fines surface and carries out granulation processing,
Wherein the fountain height of silicon sol solution is mix fines gross mass 10%, and the concentration of silica solution is 10% in silicon sol solution,
Pelletizer revolving speed is 25r/min；It is 4-6mm catalyst preformed particles that partial size is obtained after the completion of being granulated；
S300, catalyst calcination
The above-mentioned catalyst preformed particles that are prepared are subjected to calcination processing, the calcination temperature of catalyst is 600 DEG C, calcining
Catalyst ultrasonic washing instrument oscillation cleaning is removed into surface micro mist after the completion, is then added in drying box, at 120 DEG C
Iron cerium base is dried to obtain for handling the catalyst of waste water nbsCOD.
Embodiment 7
A kind of iron cerium base of the present embodiment is used to handle the preparation method of the catalyst of waste water nbsCOD, and specific steps are such as
Under:
S100, carrier are mixed with active component in fine grinding ball grinder
Using molysite and cerium salt as catalyst activity raw material, and ρ-aluminium oxide is accounted for according to the total amount of iron oxide and cerium oxide
8% ratio weighs the mixture of molysite and cerium salt；The mixture of ρ-aluminium oxide, molysite and cerium salt is placed in container, and is added
Enter suitable quantity of water and be put into ball milling mixing in ball grinder, is put into drying box and is dried to obtain mixed material in 90 DEG C；Mixing after drying
Material is crushed with crusher, is placed in levigate in ball mill, is uniformly mixed so as to obtain granularity≤300 mesh mixing fines.Wherein, ball
Mill speed is 250r/min, Ball-milling Time 25min, and mixing fines dispersion is obtained after ball milling；It is worth noting that: iron
The ratio of salt and cerium salt raw material meets, and the quality of cerium oxide is iron oxide and cerium oxide in the active component of catalyst after firing
The 30% of gross mass.
S200, catalyst prefabricated grain
Mixing fines is added in pelletizer, silicon sol solution is sprayed at mixing fines surface and carries out granulation processing,
Wherein the fountain height of silicon sol solution is mix fines gross mass 12%, and the concentration of silica solution is 18% in silicon sol solution,
Pelletizer revolving speed is 35r/min；It is 5-7mm catalyst preformed particles that partial size is obtained after the completion of being granulated；
S300, catalyst calcination
The above-mentioned catalyst preformed particles that are prepared are subjected to calcination processing, the calcination temperature of catalyst is 700 DEG C, calcining
Catalyst ultrasonic washing instrument oscillation cleaning is removed into surface micro mist after the completion, is then added in drying box, at 110 DEG C
Iron cerium base is dried to obtain for handling the catalyst of waste water nbsCOD, the scanning electron microscope of the catalyst of the present embodiment is as shown in Figure 5.
Embodiment 8
A kind of iron cobalt manganese base of the present embodiment is used to handle the preparation method of the catalyst of waste water nbsCOD, and specific steps are such as
Under:
S100, carrier are mixed with active component in fine grinding ball grinder
Using molysite, cobalt salt and manganese salt as catalyst activity raw material, and according to the total amount of iron oxide, cobalt oxide and manganese oxide
The ratio for accounting for ρ-aluminium oxide 3% weighs molysite, cobalt salt and manganese salt mixture；By the mixture of ρ-aluminium oxide, molysite and cerium salt
It is placed in container, and suitable quantity of water is added and is put into ball milling mixing in ball grinder, be put into drying box and be dried to obtain mixture in 90 DEG C
Material；Mixed material after drying is crushed with crusher, is placed in levigate in ball mill, is uniformly mixed so as to obtain granularity≤300 purposes
Mix fines.Wherein, drum's speed of rotation 300r/min, Ball-milling Time 80min obtain mixing fines dispersion after ball milling
System；It is worth noting that: the ratio of molysite, cobalt salt and manganese salt raw material meets, and aoxidizes in the active component of catalyst after firing
The quality of cobalt be iron oxide, cobalt oxide, manganese oxide gross mass 40%, and the quality of iron oxide be iron oxide, cobalt oxide, oxidation
The 50% of manganese gross mass.
S200, catalyst prefabricated grain
Mixing fines is added in pelletizer, silicon sol solution is sprayed at mixing fines surface and carries out granulation processing,
Wherein the fountain height of silicon sol solution is mix fines gross mass 12%, and the concentration of silica solution is 20% in silicon sol solution,
Pelletizer revolving speed is 10-40r/min；It is 5-7mm catalyst preformed particles that partial size is obtained after the completion of being granulated；
S300, catalyst calcination
The above-mentioned catalyst preformed particles that are prepared are subjected to calcination processing, the calcination temperature of catalyst is 500 DEG C, calcining
Time is 8h, and catalyst ultrasonic washing instrument oscillation cleaning is removed surface micro mist after the completion of calcining, is then added to drying
In case, iron cobalt manganese base is dried to obtain at 120 DEG C for handling the catalyst of waste water nbsCOD.
Embodiment 9
A kind of iron cobalt manganese base of the present embodiment is used to handle the preparation method of the catalyst of waste water nbsCOD, and specific steps are such as
Under:
S100, carrier are mixed with active component in fine grinding ball grinder
Using molysite, cobalt salt and manganese salt as catalyst activity raw material, and according to the total amount of iron oxide, cobalt oxide and manganese oxide
The ratio for accounting for ρ-aluminium oxide 5% weighs molysite, cobalt salt and manganese salt mixture；By the mixture of ρ-aluminium oxide, molysite and cerium salt
It is placed in container, and suitable quantity of water is added and is put into ball milling mixing in ball grinder, be put into drying box and be dried to obtain mixture in 90 DEG C
Material；Mixed material after drying is crushed with crusher, is placed in levigate in ball mill, is uniformly mixed so as to obtain granularity≤300 purposes
Mix fines.Wherein, drum's speed of rotation 350r/min, Ball-milling Time 60min obtain mixing fines dispersion after ball milling
System；It is worth noting that: the ratio of molysite, cobalt salt and manganese salt raw material meets, and aoxidizes in the active component of catalyst after firing
The quality of cobalt be iron oxide, cobalt oxide, manganese oxide gross mass 30%, the quality of iron oxide is iron oxide, cobalt oxide, manganese oxide
The 40% of gross mass.
S200, catalyst prefabricated grain
Mixing fines is added in pelletizer, silicon sol solution is sprayed at mixing fines surface and carries out granulation processing,
Wherein the fountain height of silicon sol solution is mix fines gross mass 8%, and the concentration of silica solution is 20% in silicon sol solution, is made
Grain machine revolving speed is 25r/min；It is 3-5mm catalyst preformed particles that partial size is obtained after the completion of being granulated；
S300, catalyst calcination
The above-mentioned catalyst preformed particles that are prepared are subjected to calcination processing, the calcination temperature of catalyst is 480 DEG C, calcining
Time is 5h, and catalyst ultrasonic washing instrument oscillation cleaning is removed surface micro mist after the completion of calcining, is then added to drying
In case, iron cerium base is dried to obtain at 110 DEG C for handling the catalyst of waste water nbsCOD.
Embodiment 10
A kind of iron cobalt manganese base of the present embodiment is used to handle the preparation method of the catalyst of waste water nbsCOD, and specific steps are such as
Under:
S100, carrier are mixed with active component in fine grinding ball grinder
Using molysite, cobalt salt and manganese salt as catalyst activity raw material, and according to the total amount of iron oxide, cobalt oxide and manganese oxide
The ratio for accounting for ρ-aluminium oxide 8% weighs molysite, cobalt salt and manganese salt mixture；By the mixture of ρ-aluminium oxide, molysite and cerium salt
It is placed in container, and suitable quantity of water is added and is put into ball milling mixing in ball grinder, be put into drying box and be dried to obtain mixture in 110 DEG C
Material；Mixed material after drying is crushed with crusher, is placed in levigate in ball mill, is uniformly mixed so as to obtain granularity≤300 purposes
Mix fines.Wherein, drum's speed of rotation 2000r/min, Ball-milling Time 55min obtain mixing fines dispersion after ball milling
System；It is worth noting that: the ratio of molysite, cobalt salt and manganese salt raw material meets, and aoxidizes in the active component of catalyst after firing
The quality of cobalt be iron oxide, cobalt oxide, manganese oxide gross mass 25%, the quality of iron oxide is iron oxide, cobalt oxide, manganese oxide
The 30% of gross mass.
S200, catalyst prefabricated grain
Mixing fines is added in pelletizer, silicon sol solution is sprayed at mixing fines surface and carries out granulation processing,
Wherein the fountain height of silicon sol solution is mix fines gross mass 10%, and the concentration of silica solution is 18% in silicon sol solution,
Pelletizer revolving speed is 38r/min；It is 3-5mm catalyst preformed particles that partial size is obtained after the completion of being granulated；
S300, catalyst calcination
The above-mentioned catalyst preformed particles that are prepared are subjected to calcination processing, the calcination temperature of catalyst is 450 DEG C, calcining
Time is 9h, and catalyst ultrasonic washing instrument oscillation cleaning is removed surface micro mist after the completion of calcining, is then added to drying
In case, iron cobalt manganese base is dried to obtain at 150 DEG C for handling the catalyst of waste water nbsCOD.
Of the invention is a kind of for handling the preparation method of the catalyst of waste water nbsCOD, using ρ-aluminium oxide as load
Body, the ρ-aluminium oxide large specific surface area, more attachment site is provided for active component, increases ozone and metal aoxidizes
The contact area of object improves ozone catalytic efficiency；On this basis, the present invention is using metal oxide as catalyst activity
Ingredient, can be improved the effect of catalytic ozonation degradation nbsCOD, and ozone amount needed for reducing ozone oxidation nbsCOD is significant to drop
Low operating cost.Particularly, on the basis of catalyst provided by the invention, using catalytic ozonation technology, by conventional oxygen
The organic matter exhaustive oxidation that agent, ozone and chlorine etc. are unable to oxygenolysis is CO2And H2O, or by converting larger molecular organics
Change molecular structure for small organic molecule, improve the biodegradability of waste water, realizes that COD's is low by subsequent biochemical reaction
Cost removal, realizes qualified discharge.
Using the method for the catalyst treatment sewage for handling waste water nbsCOD of embodiment 1-10, by embodiment 1-10
The catalyst for handling waste water nbsCOD is prepared to be added in sewage, and is passed through ozone into sewage, ozone concentration 4
~5mg/L, gas flow 0.5L/min, catalyst loading 3L test water about 4.5L, overall test volume about 6.5L condition
Under；COD removal rate when measuring catalysis reaction 60min simultaneously, during testing, while relative to not adding this implementation
The blank control group of example catalyst；Testing result record is as shown in table 1.Wherein, the measuring method of COD is catalyzed using rapid sealing
Resolution method (dichromate titration), COD removal rate calculation method are as follows:
COD removal rate (%)=(COD water inlet-COD water outlet)/COD water inlet × 100%.
The sewage wherein used in experimentation is sewage secondary clarifier effluent, certain rubbish added with aniline, phenol subject matter
Rubbish percolate bio-chemical effluent and certain paper waste sewage disposal plant effluent.
1 catalytic ozonation experimental data of table
Relative to it is no addition catalyst of the embodiment of the present invention blank control group, added with the embodiment of the present invention based on
For the catalyst of complex carrier after carrying out catalytic ozonation reaction, the removal rate of nbsCOD has different degrees of increase, urges
The catalytic effect that agent embodies in the reaction is obvious.
The present invention is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can not take off
It is carry out various modifications in the case where from the scope of the present invention being defined by the following claims and modification.Detailed description and drawings
Should be to be considered only as it is illustrative and not restrictive, if there is any such modifications and variations, then they all will
It falls into the scope of the present invention described herein.In addition, Development Status and meaning that background technique is intended in order to illustrate this technology,
It is not intended to limit the present invention or the application and application field of the invention.
More specifically, although exemplary embodiment of the present invention has been described herein, the invention is not limited to
These embodiments, but including those skilled in the art according to front detailed description it can be appreciated that it is modified, omit,
Any and whole embodiments of (such as between each embodiment) combination, adaptive change and/or replacement, and it is of the invention
It can according to need and be combined between each embodiment.Restriction language according to used in claim in claim
And widely explained, and be not limited to the example described in foregoing detailed description or during implementing this application, these show
Example should be considered as nonexcludability.Any step in office where enumerated in method or process claims can be in any order
It executes and is not limited to the sequence proposed in claim.Therefore, the scope of the present invention should only by appended claims and its
Legal equivalents determine, rather than are determined by descriptions and examples given above.
Claims (10)
1. a kind of for handling the catalyst of waste water nbsCOD, it is characterised in that: including ρ-aluminium oxide and be supported on ρ-aluminium oxide
Supported catalyst active component, the catalyst activity component are metal oxide；And the quality of catalyst activity component
For ρ-quality of alumina 2-10%.
2. according to claim 1 a kind of for handling the catalyst of waste water nbsCOD, it is characterised in that: the metal
Oxide is the iron oxide perhaps mixture of the cobalt oxide and manganese oxide perhaps mixture of cerium oxide and iron oxide or oxidation
The mixture of iron, cobalt oxide and manganese oxide.
3. according to claim 2 a kind of for handling the catalyst of waste water nbsCOD, it is characterised in that:
Metal oxide is the mixture of cobalt oxide and manganese oxide, and the mass percentage of cobalt oxide is 30-70%；Or
Metal oxide is the mixture of cerium oxide and iron oxide, and the mass percentage of iron oxide is 20-80%；Or
Metal oxide is the mixture of iron oxide, cobalt oxide and manganese oxide, and the mass percentage of cobalt oxide is 10-50%.
4. a kind of for handling the preparation method of the catalyst of waste water nbsCOD, it is characterised in that: by catalyst carrier and catalysis
Agent activated feedstock carries out combination drying, obtains mixed material；It will be added in pelletizer, add after mixed material pulverization process
Silicon sol solution carries out granulation processing, prepares catalyst preformed particles；After catalyst preformed particles are carried out calcination processing, obtain
Finished catalyst.
5. according to claim 4 a kind of for handling the preparation method of the catalyst of waste water nbsCOD, it is characterised in that:
S100, raw material mixing fine grinding
Catalyst carrier and catalyst activity raw material are first subjected to combination drying, obtain mixed material, wherein catalyst carrier is
ρ-aluminium oxide；Ball milling mixing is carried out using ball mill, obtains mixing fines；
S200, catalyst preformed particles
Mixing fines is added in pelletizer, addition silicon sol solution carries out granulation processing to mixing fines, after the completion of granulation
Obtain catalyst preformed particles；
S300, catalyst calcination processing
Calcination processing is carried out to the above-mentioned catalyst preformed particles that are prepared, catalyst activity raw material is oxidized to during calcining
Oxide, and catalyst activity component is generated, obtain finished catalyst.
6. according to claim 4 a kind of for handling the preparation method of the catalyst of waste water nbsCOD, it is characterised in that:
Metal oxide is molysite；Or
Metal oxide is the mixture of cobalt salt and manganese salt；Or
Metal oxide is the mixture of cerium salt and molysite；Or
Metal oxide is the mixture of molysite, cobalt salt and manganese salt.
7. according to claim 5 a kind of for handling the preparation method of the catalyst of waste water nbsCOD, it is characterised in that:
Catalyst carrier and catalyst activity raw material are mixed using ball grinder in S100 step.
8. according to claim 5 a kind of for handling the preparation method of the catalyst of waste water nbsCOD, it is characterised in that:
The additive amount of silicon sol solution is the 3-15% for mixing fines quality in S200 step；And in silicon sol solution silica solution quality
Percentage concentration is 5-25%.
9. it is a kind of for handling the preparation method of the catalyst of waste water nbsCOD according to claim 5~8 any one,
It is characterized by: the calcination temperature in S300 step is 400-800 DEG C, and the heating rate of calcination processing is 1-10 DEG C/min.
10. using the method for the nbsCOD in the catalyst catalytic ozonation removal sewage of claims 1 to 33, feature exists
In: catalyst is added in sewage, and is passed through ozone into sewage, ozone concentration is 4~5mg/L；It is gone by ozone oxidation
Except the nbsCOD in sewage.
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Application publication date: 20190507 |