CN108906054A - A kind of forming method using Fenton iron cement preparation ozone oxidation nbsCOD catalyst - Google Patents
A kind of forming method using Fenton iron cement preparation ozone oxidation nbsCOD catalyst Download PDFInfo
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- CN108906054A CN108906054A CN201810806918.3A CN201810806918A CN108906054A CN 108906054 A CN108906054 A CN 108906054A CN 201810806918 A CN201810806918 A CN 201810806918A CN 108906054 A CN108906054 A CN 108906054A
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- Prior art keywords
- catalyst
- nbscod
- iron cement
- fenton iron
- ozone oxidation
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 239000003054 catalyst Substances 0.000 title claims abstract description 70
- 239000004568 cement Substances 0.000 title claims abstract description 47
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 47
- 230000003647 oxidation Effects 0.000 title claims abstract description 41
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 41
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000008188 pellet Substances 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 20
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 19
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000001125 extrusion Methods 0.000 claims abstract description 15
- 238000005453 pelletization Methods 0.000 claims abstract description 14
- 238000010521 absorption reaction Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000005563 spheronization Methods 0.000 claims abstract description 6
- 238000005119 centrifugation Methods 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims description 17
- 239000004411 aluminium Substances 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 14
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000000908 ammonium hydroxide Substances 0.000 claims description 12
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 12
- 239000012153 distilled water Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000006228 supernatant Substances 0.000 claims description 12
- 238000002604 ultrasonography Methods 0.000 claims description 12
- 238000001354 calcination Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 238000006555 catalytic reaction Methods 0.000 claims 1
- 239000011521 glass Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 10
- 239000011230 binding agent Substances 0.000 abstract description 5
- 238000005096 rolling process Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000000314 lubricant Substances 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 230000003197 catalytic effect Effects 0.000 description 16
- 238000006385 ozonation reaction Methods 0.000 description 16
- 239000008187 granular material Substances 0.000 description 4
- 239000010865 sewage Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- -1 hydroxyl radical free radical Chemical class 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/74—Iron group metals
- B01J23/745—Iron
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- B01J35/30—
-
- B01J35/31—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
-
- 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
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
Abstract
The present invention relates to a kind of forming methods using Fenton iron cement preparation ozone oxidation nbsCOD catalyst, the method is using treated Fenton iron cement, aluminium oxide as primary raw material, waterglass is binder and lubricant, it is added after a certain amount of water is mixed, using extrusion spheronization method, mixed material is put into and is squeezed out in set frame, pelletizing is squeezed out and obtains the cylindrical pellet that draw ratio is 0.85-1.00.Cylindrical pellet is placed in the balling-up at revolving speed 30-50r/min in centrifugation spheronizator, then dries, is calcined at 400-550 DEG C, keep the temperature 2-4h, obtain ozone oxidation nbsCOD catalyst.The density of ozone oxidation nbsCOD catalyst prepared by the present invention is 0.90-1.15g/cm3, porosity 50-75%, water absorption rate 45-68%, compression strength is higher than 90 N.Technology of the invention efficiently solves lean material Fenton iron cement and is not easy rolling balling, and prepares the lower problem of catalyst strength.The catalyst of preparation can effectively improve the ability of ozone degradation nbsCOD, have good industrial applications prospect.
Description
Technical field
The invention belongs to catalyst preparation technical fields more particularly to a kind of utilization Fenton iron cement to prepare ozone oxidation
The forming method of nbsCOD catalyst.
Background technique
With the attention that country works to energy-saving and emission-reduction, Environmental Protection Situation is more severe, and Industrial Wastewater Treatment is to water outlet COD
The requirement of discharge is also higher and higher.And conventional biological treatment（Two stage treatment）Technique has been unable to reach discharge standard, just has thus
More and more sewage plants increase further treatment technique.How further treatment technique realizes economic and stable removal nbsCOD
As a urgent problem needed to be solved, catalytic ozonation is one of the key technology of nbsCOD in deeply treating wastewater, the skill
Art does not generate secondary pollution, easy to operate, can solve the low deficiency of ozone oxidation efficiency, can reduce sewage treatment plant's operation
Cost.
Catalytic ozonation technology mainly utilizes catalyst ozone to generate hydroxyl radical free radical OH, hydroxyl radical free radical
There is very strong oxidability to hardly degraded organic substance, most organic matter can be aoxidized.Therefore catalyst is catalytic ozonation
The core of technology.Catalyst applied to catalytic ozonation is generally spheric granules of uniform size, relative to other shapes,
Spheric granules has higher specific surface area.And there is uniform gap between spheric granules, be conducive to the dispersion of ozone, improve
The contact area of ozone and catalyst.
Due to Fe2O3Catalytic activity with higher, and cost of material is lower, so being using more catalyst at present
Alumina load Fe2O3Spheric catalyst.And Fenton iron cement is the solid waste generated when handling sewage using Fenton method
Object can be converted into Fe after certain program processing wherein containing a large amount of iron hydroxide2O3It is urged as catalytic ozonation
The active component of agent.
The preparation method of ball type carrier catalyst is mostly rotation spherical container shaping method at present.Rotation spherical container shaping method be by plasticity powder,
Suitable quantity of water（Or other binders）It is sent into the container that slowly runs, powder particles reunite one under liquid bridge and capillary force action
Rise, formed micronucleus, container rotate caused by frictional force and rolling impact effect under, constantly powder layer revolution, grow up,
Finally become a certain size spheric granules and leaves container.However Fenton iron cement is lean material, without viscous after being mixed with water
Property, it is unable to rolling balling, even if molding, catalyst strength is also relatively low, can not apply in water.
The present invention is quasi- to utilize Fenton iron cement for active component raw material, using extrusion spheronization method preparation ozone oxidation nbsCOD's
Catalyst solves Fenton iron cement and prepares that spheric catalyst is not easily molded, the lower problem of intensity.
Summary of the invention
The purpose of the present invention is to provide a kind of molding sides using Fenton iron cement preparation ozone oxidation nbsCOD catalyst
Method, it is intended to solving Fenton iron cement is lean material, without sticky after mix with water, is not easy rolling balling, and catalyst strength compared with
Low problem.
The technical solution adopted by the present invention is as follows：It is a kind of using Fenton iron cement preparation ozone oxidation nbsCOD catalyst at
Type method.For the present invention with treated Fenton iron cement, aluminium oxide is primary raw material, and waterglass is binder and lubricant, is added
After a certain amount of water mixes, ozone oxidation nbsCOD catalyst is prepared using extrusion spheronization method.Include the following steps：
（1）Ammonium hydroxide is added into Fenton iron cement and adjusts pH to 6-10,60 DEG C of ultrasound 10-20min, filters off supernatant liquor, uses respectively
Distilled water and dehydrated alcohol clean 2-3 times repeatedly, are then placed in drying box and dry.And in the ball mill by the raw material after drying
It is levigate；
（2）It will（1）The Fenton iron cement handled well is placed in container together with a certain amount of active oxidation aluminium powder, is added appropriate
Water and waterglass stir and evenly mix to obtain mixed material；
（3）It will（2）The mixed material, which is put into, to be squeezed out in set frame, is squeezed out by the circular hole template of certain pore size, through pelletizing
After obtain cylindrical pellet；
（4）It will（3）The cylindrical pellet is placed in balling-up in the pan-pelletizer of centrifugation spheronizator, and catalyst precast body is made；
（5）It will（4）The catalyst precast body is dried, after calcination processing, obtains ozone oxidation nbsCOD catalyst.
In the preferred embodiment, the additional amount of the Fenton iron cement is 20-60wt% of active oxidation aluminium powder.
In the preferred embodiment, the additional amount of the waterglass is the 1-of Fenton iron cement and activated alumina total amount
5wt%。
In the preferred embodiment, the draw ratio of the cylindrical pellet is 0.85-1.00.
In the preferred embodiment, the revolving speed of the pan-pelletizer is 30-50 r/min.
In the preferred embodiment, the calcination temperature of the catalyst precast body is 400-550 DEG C, soaking time 2-4
h。
The density of ozone oxidation nbsCOD catalyst prepared by the present invention is 0.90-1.15 g/cm3, porosity 50-
75%, water absorption rate 45-68%, compression strength are higher than 90 N.The catalyst of preparation can effectively remove in trade effluent
NbsCOD, 1 h of catalytic ozonation, to the removal rate of nbsCOD in trade effluent up to 65 % or more.
The present invention provides the forming methods using Fenton iron cement preparation ozone oxidation nbsCOD catalyst, with treated
Fenton iron cement, activated alumina are primary raw material, and waterglass is binder, and catalyst is prepared using extrusion-spheronization, through squeezing
Item, pelletizing, it is round as a ball, calcining and etc. preparation ozone oxidation nbsCOD catalyst.The extrusion-spheronization efficiently solves Fenton
Iron cement as lean material, after being mixed with water without viscosity, it is not easily molded using traditional rolling balling method, and catalyst strength compared with
Low problem.Simultaneously using waterglass as binder and lubricant, extrusion of the material in pattern hole is not only facilitated, it can will be fragrant
Iron cement of pausing firmly is combined together with activated alumina, further improves catalyst strength.
Specific embodiment
Embodiment 1
Ammonium hydroxide is first added into Fenton iron cement and adjusts pH to 6-10,60 DEG C of ultrasound 10-20min, filters off supernatant liquor, uses steam respectively
Distilled water and dehydrated alcohol clean 2-3 times repeatedly, are then placed in drying box and dry, and are put into levigate in ball mill.Weigh 100kg mill
Thin Fenton iron cement, 500kg active oxidation aluminium powder are placed in container, and the waterglass of 1 wt% is added, and it is mixed that suitable quantity of water stirring is added
It is even.Then mixed material is put into and is squeezed out in set frame, obtain the cylindrical pellet that draw ratio is 0.85 through extrusion, pelletizing.It will
It is balling-up in 30 r/min pan-pelletizers that cylindrical pellet, which is placed in revolving speed, and catalyst precast body is made.By catalyst precast body 400
2 h are calcined at DEG C, obtain the catalyst of ozone oxidation nbsCOD, and density is 0.92 g/cm3, the porosity is 74.6 %, water suction
Rate is 65.8 %, and intensity is 96 N.1 h of catalytic ozonation is 66.3 % to COD removal rate.
Embodiment 2
Ammonium hydroxide is first added into Fenton iron cement and adjusts pH to 6-10,60 DEG C of ultrasound 10-20min, filters off supernatant liquor, uses steam respectively
Distilled water and dehydrated alcohol clean 2-3 times repeatedly, are then placed in drying box and dry, and are put into levigate in ball mill.Weigh 200 kg
Levigate Fenton iron cement, 500 kg active oxidation aluminium powders are placed in container, and the waterglass of 3 wt% is added, and suitable quantity of water stirring is added
It mixes.Then mixed material is put into and is squeezed out in set frame, obtain the cylindrical pellet that draw ratio is 0.95 through extrusion, pelletizing.
It is balling-up in 40 r/min pan-pelletizers that cylindrical pellet, which is placed in revolving speed, and catalyst precast body is made.Catalyst precast body is existed
3 h are calcined at 450 DEG C, obtain the catalyst of ozone oxidation nbsCOD, and density is 1.14 g/cm3, the porosity is 58.2 %,
Water absorption rate is 47.8 %, and intensity is 134 N.1 h of catalytic ozonation is 71.8 % to COD removal rate.
Embodiment 3
Ammonium hydroxide is first added into Fenton iron cement and adjusts pH to 6-10,60 DEG C of ultrasound 10-20min, filters off supernatant liquor, uses steam respectively
Distilled water and dehydrated alcohol clean 2-3 times repeatedly, are then placed in drying box and dry, and are put into levigate in ball mill.Weigh 300 kg
Levigate Fenton iron cement, 500 kg active oxidation aluminium powders are placed in container, and the waterglass of 5 wt% is added, and suitable quantity of water stirring is added
It mixes.Then mixed material is put into and is squeezed out in set frame, obtain the cylindrical pellet that draw ratio is 1.00 through extrusion, pelletizing.
It is balling-up in 50 r/min pan-pelletizers that cylindrical pellet, which is placed in revolving speed, and catalyst precast body is made.Catalyst precast body is existed
4 h are calcined at 550 DEG C, obtain the catalyst of ozone oxidation nbsCOD, and density is 1.04 g/cm3, the porosity is 65.7 %,
Water absorption rate is 56.4 %, and intensity is 113 N.1 h of catalytic ozonation is 70.4 % to COD removal rate.
Embodiment 4
Ammonium hydroxide is first added into Fenton iron cement and adjusts pH to 6-10,60 DEG C of ultrasound 10-20min, filters off supernatant liquor, uses steam respectively
Distilled water and dehydrated alcohol clean 2-3 times repeatedly, are then placed in drying box and dry, and are put into levigate in ball mill.Weigh 200 kg
Levigate Fenton iron cement, 500 kg active oxidation aluminium powders are placed in container, and the waterglass of 1 wt% is added, and suitable quantity of water stirring is added
It mixes.Then mixed material is put into and is squeezed out in set frame, obtain the cylindrical pellet that draw ratio is 0.85 through extrusion, pelletizing.
It is balling-up in 50 r/min pan-pelletizers that cylindrical pellet, which is placed in revolving speed, and catalyst precast body is made.Catalyst precast body is existed
4 h are calcined at 400 DEG C, obtain the catalyst of ozone oxidation nbsCOD, and density is 1.00 g/cm3, the porosity is 67.1 %,
Water absorption rate is 61.0 %, and intensity is 107 N.1 h of catalytic ozonation is 72.5 % to COD removal rate.
Embodiment 5
Ammonium hydroxide is first added into Fenton iron cement and adjusts pH to 6-10,60 DEG C of ultrasound 10-20min, filters off supernatant liquor, uses steam respectively
Distilled water and dehydrated alcohol clean 2-3 times repeatedly, are then placed in drying box and dry, and are put into levigate in ball mill.Weigh 100 kg
Levigate Fenton iron cement, 500 kg active oxidation aluminium powders are placed in container, and the waterglass of 3 wt% is added, and suitable quantity of water stirring is added
It mixes.Then mixed material is put into and is squeezed out in set frame, obtain the cylindrical pellet that draw ratio is 0.85 through extrusion, pelletizing.
It is balling-up in 40 r/min pan-pelletizers that cylindrical pellet, which is placed in revolving speed, and catalyst precast body is made.Catalyst precast body is existed
3 h are calcined at 450 DEG C, obtain the catalyst of ozone oxidation nbsCOD, and density is 0.95 g/cm3, the porosity is 70.5 %,
Water absorption rate is 63.7 %, and intensity is 101 N.1 h of catalytic ozonation is 67.2 % to COD removal rate.
Embodiment 6
Ammonium hydroxide is first added into Fenton iron cement and adjusts pH to 6-10,60 DEG C of ultrasound 10-20min, filters off supernatant liquor, uses steam respectively
Distilled water and dehydrated alcohol clean 2-3 times repeatedly, are then placed in drying box and dry, and are put into levigate in ball mill.Weigh 300 kg
Levigate Fenton iron cement, 500 kg active oxidation aluminium powders are placed in container, and the waterglass of 3 wt% is added, and suitable quantity of water stirring is added
It mixes.Then mixed material is put into and is squeezed out in set frame, obtain the cylindrical pellet that draw ratio is 1.00 through extrusion, pelletizing.
It is balling-up in 40 r/min pan-pelletizers that cylindrical pellet, which is placed in revolving speed, and catalyst precast body is made.Catalyst precast body is existed
2 h are calcined at 400 DEG C, obtain the catalyst of ozone oxidation nbsCOD, and density is 1.09 g/cm3, the porosity is 61.8 %,
Water absorption rate is 52.9 %, and intensity is 122 N.1 h of catalytic ozonation is 74.6 % to COD removal rate.
Embodiment 7
Ammonium hydroxide is first added into Fenton iron cement and adjusts pH to 6-10,60 DEG C of ultrasound 10-20min, filters off supernatant liquor, uses steam respectively
Distilled water and dehydrated alcohol clean 2-3 times repeatedly, are then placed in drying box and dry, and are put into levigate in ball mill.Weigh 200 kg
Levigate Fenton iron cement, 500 kg active oxidation aluminium powders are placed in container, and the waterglass of 1 wt% is added, and suitable quantity of water stirring is added
It mixes.Then mixed material is put into and is squeezed out in set frame, obtain the cylindrical pellet that draw ratio is 0.95 through extrusion, pelletizing.
It is balling-up in 30 r/min pan-pelletizers that cylindrical pellet, which is placed in revolving speed, and catalyst precast body is made.Catalyst precast body is existed
2 h are calcined at 450 DEG C, obtain the catalyst of ozone oxidation nbsCOD, and density is 1.01 g/cm3, the porosity is 66.4 %,
Water absorption rate is 60.1 %, and intensity is 109 N.1 h of catalytic ozonation is 71.9% to COD removal rate.
Embodiment 8
Ammonium hydroxide is first added into Fenton iron cement and adjusts pH to 6-10,60 DEG C of ultrasound 10-20min, filters off supernatant liquor, uses steam respectively
Distilled water and dehydrated alcohol clean 2-3 times repeatedly, are then placed in drying box and dry, and are put into levigate in ball mill.Weigh 300 kg
Levigate Fenton iron cement, 500 kg active oxidation aluminium powders are placed in container, and the waterglass of 3wt% is added, and it is mixed that suitable quantity of water stirring is added
It is even.Then mixed material is put into and is squeezed out in set frame, obtain the cylindrical pellet that draw ratio is 0.85 through extrusion, pelletizing.It will
It is balling-up in 50 r/min pan-pelletizers that cylindrical pellet, which is placed in revolving speed, and catalyst precast body is made.By catalyst precast body 450
4 h are calcined at DEG C, obtain the catalyst of ozone oxidation nbsCOD, and density is 1.11 g/cm3, the porosity is 60.2 %, water suction
Rate is 51.3 %, and intensity is 128 N.Catalytic ozonation 1h is 73.1% to COD removal rate.
Embodiment 9
Ammonium hydroxide is first added into Fenton iron cement and adjusts pH to 6-10,60 DEG C of ultrasound 10-20min, filters off supernatant liquor, uses steam respectively
Distilled water and dehydrated alcohol clean 2-3 times repeatedly, are then placed in drying box and dry, and are put into levigate in ball mill.Weigh 100 kg
Levigate Fenton iron cement, 500 kg active oxidation aluminium powders are placed in container, and the waterglass of 5 wt% is added, and suitable quantity of water stirring is added
It mixes.Then mixed material is put into and is squeezed out in set frame, obtain the cylindrical pellet that draw ratio is 0.95 through extrusion, pelletizing.
It is balling-up in 40 r/min pan-pelletizers that cylindrical pellet, which is placed in revolving speed, and catalyst precast body is made.Catalyst precast body is existed
4 h are calcined at 550 DEG C, obtaining its density of the catalyst of ozone oxidation nbsCOD is 0.96 g/cm3, the porosity is 68.7 %,
Water absorption rate is 61.2 %, and intensity is 104 N.1 h of catalytic ozonation is 66.7 % to COD removal rate.
Embodiment 10
Ammonium hydroxide is first added into Fenton iron cement and adjusts pH to 6-10,60 DEG C of ultrasound 10-20min, filters off supernatant liquor, uses steam respectively
Distilled water and dehydrated alcohol clean 2-3 times repeatedly, are then placed in drying box and dry, and are put into levigate in ball mill.Weigh 200 kg
Levigate Fenton iron cement, 500 kg active oxidation aluminium powders are placed in container, and the waterglass of 5wt% is added, and it is mixed that suitable quantity of water stirring is added
It is even.Then mixed material is put into and is squeezed out in set frame, obtain the cylindrical pellet that draw ratio is 1.00 through extrusion, pelletizing.It will
It is balling-up in 30 r/min pan-pelletizers that cylindrical pellet, which is placed in revolving speed, and catalyst precast body is made.By catalyst precast body 550
3 h are calcined at DEG C, obtain the catalyst of ozone oxidation nbsCOD, and density is 1.07 g/cm3, the porosity is 63.6 %, water suction
Rate is 55.2 %, and intensity is 116 N.1 h of catalytic ozonation is 69.9 % to COD removal rate.
Claims (1)
1. a kind of forming method using Fenton iron cement preparation ozone oxidation nbsCOD catalyst, which is characterized in that including following
Step：Ammonium hydroxide is first added into Fenton iron cement and adjusts pH to 6-10,60 DEG C of ultrasound 10-20min, filters off supernatant liquor, uses respectively
Distilled water and dehydrated alcohol clean 2-3 times repeatedly, are then placed in drying box and dry, and the raw material after drying is ground in the ball mill
Carefully, then by the Fenton iron cement handled well it is placed in container together with a certain amount of active oxidation aluminium powder, suitable quantity of water and water glass is added
Glass stirs and evenly mixs, and is then put into mixed material and squeezes out in set frame, is squeezed out by the circular hole template of certain pore size, is obtained through pelletizing
To cylindrical pellet, cylindrical pellet is placed in balling-up in the pan-pelletizer of centrifugation spheronizator, catalyst precast body is made, to catalysis
After agent precast body is dried, calcines, the catalyst of ozone oxidation nbsCOD is obtained；The catalyst uses extrusion spheronization legal system
It is standby；The additional amount of Fenton iron cement is 20-60wt% of active oxidation aluminium powder；The additional amount of waterglass is Fenton iron cement and active oxygen
Change the 1-5wt% of aluminium total amount；The draw ratio for squeezing out the cylindrical pellet that set frame squeezes out is 0.85-1.00；The revolving speed of pan-pelletizer is
30-50 r/min；The calcination processing temperature of catalyst precast body is 400-550 DEG C, and soaking time is 2-4 h；The ozone of preparation
The density for aoxidizing the catalyst of nbsCOD is 0.90-1.15 g/cm3, the porosity is 50-75 %, and water absorption rate is 45-68 %, is resisted
Compressive Strength is higher than 90 N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810806918.3A CN108906054A (en) | 2018-07-21 | 2018-07-21 | A kind of forming method using Fenton iron cement preparation ozone oxidation nbsCOD catalyst |
Applications Claiming Priority (1)
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