CN111392914A - Heterogeneous composite catalytic oxidation sewage advanced treatment method and system - Google Patents
Heterogeneous composite catalytic oxidation sewage advanced treatment method and system Download PDFInfo
- Publication number
- CN111392914A CN111392914A CN202010337934.XA CN202010337934A CN111392914A CN 111392914 A CN111392914 A CN 111392914A CN 202010337934 A CN202010337934 A CN 202010337934A CN 111392914 A CN111392914 A CN 111392914A
- Authority
- CN
- China
- Prior art keywords
- ozone
- output end
- tail gas
- sewage
- catalytic reaction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010865 sewage Substances 0.000 title claims abstract description 106
- 239000002131 composite material Substances 0.000 title claims abstract description 49
- 230000003647 oxidation Effects 0.000 title claims abstract description 39
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 39
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 24
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 85
- 239000002101 nanobubble Substances 0.000 claims abstract description 58
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 57
- 239000003054 catalyst Substances 0.000 claims abstract description 35
- 239000000126 substance Substances 0.000 claims abstract description 7
- 238000011049 filling Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000005086 pumping Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 58
- 239000007789 gas Substances 0.000 claims description 54
- 239000002351 wastewater Substances 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 16
- 229910003158 γ-Al2O3 Inorganic materials 0.000 claims description 12
- 238000004065 wastewater treatment Methods 0.000 claims description 11
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 239000012266 salt solution Substances 0.000 claims description 9
- 229910052723 transition metal Inorganic materials 0.000 claims description 9
- 150000003624 transition metals Chemical class 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 6
- 231100000331 toxic Toxicity 0.000 claims description 4
- 230000002588 toxic effect Effects 0.000 claims description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 3
- 229910002651 NO3 Inorganic materials 0.000 claims description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 3
- 150000003841 chloride salts Chemical class 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 239000003960 organic solvent Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims 1
- 238000005303 weighing Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 5
- 231100000719 pollutant Toxicity 0.000 abstract description 5
- 230000033558 biomineral tissue development Effects 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000000149 chemical water pollutant Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000007210 heterogeneous catalysis Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 231100001234 toxic pollutant Toxicity 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- -1 petroleum refining Substances 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8671—Removing components of defined structure not provided for in B01D53/8603 - B01D53/8668
- B01D53/8675—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
- 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
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/889—Manganese, technetium or rhenium
- B01J23/8892—Manganese
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention provides a heterogeneous composite catalytic oxidation sewage advanced treatment method, which comprises the following steps: s1, pumping the pretreated sewage into a sewage collecting device to remove suspended matters and colloidal substances; s2, mixing the effluent of the sewage collection device with ozone through an ozone micro-nano bubble forming device, entering a catalytic reaction device, and reacting with a composite catalyst filled in the catalytic reaction device; and S3, filling the tail gas discharged from the outlet of the catalytic reaction device into a tail gas treatment device, heating and decomposing the ozone tail gas, and decomposing the ozone tail gas through a catalyst layer, wherein the treated tail gas reaches the standard and is discharged. Still provide a heterogeneous compound catalytic oxidation sewage advanced treatment system, including sewage collection device, the micro-nano bubble of ozone formation device, catalytic reaction device and tail gas processing apparatus. The organic pollutants are quickly degraded, the utilization rate and the oxidation efficiency of ozone are greatly improved, the mineralization and removal effects of the pollutants are improved, and secondary environmental pollution is not generated.
Description
Technical Field
The invention relates to the technical field of organic wastewater treatment, in particular to a heterogeneous composite catalytic oxidation sewage advanced treatment method and a system thereof.
Background
At present, the industrial sewage has complex components, is difficult to effectively remove, has poor biodegradability, high toxicity and great harm to the environment and human beings, and can not meet the requirements of people on water quality. The existing conventional biochemical water treatment process is difficult to effectively remove the refractory organic pollutants, so the advanced oxidation technology becomes an important means for treating the biologically refractory organic toxic pollutants. The traditional heterogeneous catalysis ozone oxidation process is simple in sewage treatment by using ozone, low in ozone utilization rate and high in operating cost, limits the treatment capacity of the traditional heterogeneous catalysis ozone oxidation process on organic matters in sewage, cannot effectively treat refractory substances, and is poor in treatment effect.
Disclosure of Invention
The invention aims to provide a heterogeneous composite catalytic oxidation sewage advanced treatment method, which is used for solving at least one technical problem and can be used for rapidly degrading organic pollutants, greatly improving the utilization rate and the oxidation efficiency of ozone, improving the mineralization removal effect of the pollutants and generating no secondary environmental pollution.
The invention also aims to provide a heterogeneous composite catalytic oxidation sewage advanced treatment system, which can rapidly degrade organic pollutants, greatly improve the utilization rate and the oxidation efficiency of ozone, improve the mineralization removal effect of the pollutants and avoid secondary environmental pollution.
The embodiment of the invention is realized by the following steps:
a heterogeneous composite catalytic oxidation sewage advanced treatment method comprises the following steps:
s1, pumping the pretreated sewage into a sewage collecting device to remove suspended matters and colloidal substances.
And S2, mixing the effluent of the sewage collection device with ozone through the ozone micro-nano bubble forming device, allowing the effluent to enter a catalytic reaction device, reacting with a composite catalyst filled in the catalytic reaction device, removing toxic and harmful organic matters in the sewage after catalytic oxidation, reacting the treated sewage in the catalytic reaction device again if the treated sewage does not reach the standard, and discharging the sewage if the treated sewage reaches the standard.
And S3, filling the tail gas discharged from the outlet of the catalytic reaction device into a tail gas treatment device, heating and decomposing the ozone tail gas, and decomposing the ozone tail gas through a catalyst layer, wherein the treated tail gas reaches the standard and is discharged.
In a preferred embodiment of the present invention, the composite catalyst comprises a catalyst substrate and an active component.
The catalyst substrate comprises gamma-Al2O3。
The active component is based on Mn-Ce composite metal oxide and is added with transition metal.
The transition metal comprises Cu, Fe, Ni, Co and Zn.
In a preferred embodiment of the present invention, the preparation method of the composite catalyst described in S2 above includes the following steps:
s21, using an isometric immersion method, the nitrate and chloride salt of the transition metal are weighed according to the proportion and dissolved by adding water or ethanol or other organic solvents to prepare the metal salt solution.
And S22, adjusting the pH value of the metal salt solution to 11-13, uniformly stirring, and standing.
S23, taking gamma-Al2O3The ball is immersed in the metal salt solution for 10-15 hours.
S24, drying the gamma-Al2O3And (3) sintering the balls at a high temperature of 300-500 ℃ for 2-5 hours to obtain the composite catalyst.
In a preferred embodiment of the present invention, the mass ratio of the amount of ozone added to the amount of COD removed in S2 is 0.4-1.
The invention also provides a heterogeneous composite catalytic oxidation sewage advanced treatment system which comprises a sewage collecting device, an ozone micro-nano bubble forming device, a catalytic reaction device and a tail gas treatment device.
The sewage collecting device is communicated with the ozone micro-nano bubble forming device through a first sewage inlet pipe.
The sewage collecting device is communicated with the catalytic reaction device through a second sewage inlet pipe.
The ozone micro-nano bubble forming device is communicated with the catalytic reaction device through an ozone micro-nano bubble water outlet pipe.
The catalytic reaction device is communicated with the tail gas treatment device through a tail gas transmission pipe.
In a preferred embodiment of the present invention, the sewage collecting device includes a sewage pump and a cartridge filter.
The output end of the sewage pump is communicated with the input end of the security filter.
The output end of the cartridge filter comprises a first output end and a second output end.
And the first output end of the cartridge filter is communicated with the ozone micro-nano bubble forming device through a first sewage inlet pipe.
And the second output end of the cartridge filter is communicated with the catalytic reaction device through a second sewage inlet pipe.
In a preferred embodiment of the present invention, the ozone micro-nano bubble forming device includes an ozone generator and a micro-nano bubble generator.
The input end of the ozone generator is connected with an air source through a pure oxygen inlet pipe.
The output end of the ozone generator is communicated with the micro-nano bubble generator through an ozone transmission pipe.
And a second flow regulator is arranged on the ozone transmission pipe.
And the first output end of the cartridge filter is communicated with the micro-nano bubble generator through the first sewage inlet pipe.
And a first flow regulator is arranged on the first sewage inlet pipe.
The output end of the micro-nano bubble generator is communicated with the catalytic reaction device through an ozone micro-nano bubble outlet pipe.
In a preferred embodiment of the present invention, the catalytic reaction device is disposed in the reactor shell and includes, from top to bottom, a wastewater inlet layer, a catalytic reaction layer, and a water outlet layer.
The sewage inlet layer and the catalytic reaction layer are separated by a filler bearing plate.
And the filler bearing plate is loaded with a composite catalyst.
And the filler bearing plate is provided with filter holes.
The output end of the sewage inlet layer is communicated with the catalytic reaction layer through a first lifting pump.
The catalytic reaction layer and the water outlet layer are separated by a partition plate.
The partition board is provided with a filtering hole.
And the output end of the catalytic reaction layer is communicated with the water outlet layer through a second lifting pump.
And the second output end of the cartridge filter is communicated with the sewage inlet layer through a second sewage inlet pipe.
And a third flow regulator is arranged on the second sewage inlet pipe.
The output end of the micro-nano bubble generator is communicated with the sewage inlet layer through an ozone micro-nano bubble outlet pipe.
And a fourth flow regulator is arranged on the ozone micro-nano bubble water outlet pipe.
The output end of the water outlet layer comprises a first output end and a second output end.
And the first output end of the water outlet layer is connected with a water outlet discharge pipe.
And a discharge control valve is arranged on the water outlet discharge pipe.
And the second output end of the water outlet layer is connected with a tail gas treatment device through a tail gas transmission pipe.
In a preferred embodiment of the present invention, the output end of the water outlet layer further includes a third output end.
And the third output end of the water outlet layer is connected with the sewage inlet layer through a water outlet return pipe.
And a backflow control valve and a backflow pump are arranged on the water outlet backflow pipe.
In a preferred embodiment of the present invention, the tail gas treatment device includes a tail gas absorption tower.
And the second output end of the water outlet layer is connected with the tail gas absorption tower through a tail gas transmission pipe.
And the output end of the tail gas absorption tower is connected with a tail gas discharge pipe.
And a fan is arranged on the tail gas discharge pipe.
The embodiment of the invention has the beneficial effects that:
(1) the invention adopts the micro-nano bubble generator to convey the mixture of the wastewater and the ozone to the gamma-Al2O3In the catalytic reaction device using the ozone as the carrier, the dispersion rate of the ozone micro-nano bubbles in the wastewater is high, the ozone micro-nano bubbles are more fully contacted with organic matters and catalysts in the wastewater, the generation rate of hydroxyl radicals of the ozone micro-nano bubbles is high, toxic and harmful organic matters in a water body can be removed more efficiently, and the removal efficiency of the ozone micro-nano bubbles to the organic matters is higher than that of a traditional ozone treatment method;
(2) Gamma-Al used in the invention2O3The composite catalyst used as a carrier has large specific surface area and stable property, can adsorb organic pollutants, increases the contact area of the pollutants and hydroxyl radicals, and the composite metal loaded on the composite catalyst can strengthen the catalytic capacity to ozone, improve the effective utilization rate of the hydroxyl radicals and strengthen the treatment effect;
(3) compared with the common domestic sewage, the biodegradability of the landfill leachate is poor, and the BOD of the landfill leachate is generally low5The COD value is only about 0.05. The C/N of the landfill leachate is too low, which can cause the proportion of nutrient elements of microorganisms to be disordered, and simultaneously, the high-concentration NH of the landfill leachate4+N has a strong poisoning effect on microorganisms, which is another reason why leachate is difficult to biologically treat. The improvement of C/N after the heterogeneous composite catalytic oxidation can improve the biodegradability of the percolate to a certain extent and the BOD of the percolate with different concentrations5The COD value is increased from 0.085-0.145 before catalytic oxidation to 0.31-0.475 after catalytic oxidation, and the biodegradability of the catalyst is obviously improved;
(4) the flow regulators are arranged at multiple positions to regulate the speed, so that the passing amount of sewage and ozone in the medium flow channel is regulated, the effective combination of ozone and micro-nano bubbles is facilitated, the purification efficiency of the system is improved, and the running stability of the system is maintained;
(5) the catalytic reaction device is provided with an effluent reflux system, so that the reuse rate and the catalytic effect of the catalyst are improved, and the removal rate of the organic and toxic pollutants which are difficult to degrade is greatly improved;
(6) the method is characterized in that gamma-alumina with high mechanical strength and good stability is selected as a catalyst substrate, and simultaneously, transition metal oxide, noble metal and rare earth element are carried to form a composite catalyst with high catalytic activity, and the utilization rate and oxidation efficiency of ozone are greatly improved and the mineralization removal effect of pollutants is improved by combining the micro-nano bubble technology;
(7) continuous and automatic operation is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
The method for advanced treatment of heterogeneous composite catalytic oxidation sewage of the invention is further described in detail with reference to the accompanying drawings and the specific embodiments.
FIG. 1 is a schematic structural diagram of a heterogeneous phase composite catalytic oxidation sewage advanced treatment system according to the present invention;
FIG. 2 is a schematic structural diagram of a catalytic reaction device of the advanced treatment system for heterogeneous composite catalytic oxidation sewage.
In the figure: 1-a catalytic reaction unit; 2-water outlet layer; 201-a separator; 202-a second lift pump; 3-a catalytic reaction layer; 301-a filler retainer plate; 302-a first lift pump; 4-water outlet return pipe; 401-reflux control valve; 5-a water outlet discharge pipe; 501-a discharge control valve; 6-an ozone generator; 601-pure oxygen inlet pipe; 602-an ozone transfer tube; 6021-a second flow regulator; 7-cartridge filter; 701-a sewage pump; 702-a second sewage inlet pipe; 7021-third flow regulator; 8-a micro-nano bubble generator; 801-a first sewage inlet pipe; 8011-first flow regulator; 802-ozone micro-nano bubble water outlet pipe; 8021-a fourth flow regulator; 9-a tail gas absorption tower; 901-tail gas transmission pipe; 902-exhaust gas discharge pipe; 10-a fan; 11-reflux pump; 12-a reactor shell; 13-Sewage enters the water layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The embodiment of the invention is shown in fig. 1 to 2, and provides a heterogeneous composite catalytic oxidation sewage advanced treatment method, which comprises the following steps:
s1, pumping the pretreated sewage into a sewage collecting device to remove suspended matters and colloidal substances.
S2, mixing the effluent of the sewage collection device with ozone through the ozone micro-nano bubble forming device, allowing the effluent to enter the catalytic reaction device 1 to react with the composite catalyst filled in the catalytic reaction device 1, removing toxic and harmful organic matters in the sewage after catalytic oxidation, reacting the treated sewage in the catalytic reaction device 1 again if the treated sewage does not reach the standard, and discharging the sewage if the treated sewage reaches the standard.
And S3, filling the tail gas discharged from the outlet of the catalytic reaction device 1 into a tail gas treatment device, heating and decomposing the ozone tail gas, and decomposing the ozone tail gas through a catalyst layer, wherein the treated tail gas reaches the standard and is discharged.
The composite catalyst comprises a catalyst substrate and an active component.
The catalyst substrate comprises gamma-Al2O3。
The active component is based on Mn-Ce composite metal oxide and is added with transition metal.
The transition metal comprises Cu, Fe, Ni, Co and Zn.
The preparation method of the composite catalyst in S2 comprises the following steps:
s21, using an isometric immersion method, the nitrate and chloride salt of the transition metal are weighed according to the proportion and dissolved by adding water or ethanol or other organic solvents to prepare the metal salt solution.
And S22, adjusting the pH value of the metal salt solution to 11-13, uniformly stirring, and standing.
S23, taking gamma-Al2O3The ball is immersed in the metal salt solution for 10-15 hours.
S24, drying the gamma-Al2O3And (3) sintering the balls at a high temperature of 300-500 ℃ for 2-5 hours to obtain the composite catalyst.
The mass fraction ratio of the ozone input amount to the COD removal amount in S2 is 0.4-1.
The embodiment also provides a heterogeneous composite catalytic oxidation sewage advanced treatment system for the heterogeneous composite catalytic oxidation sewage advanced treatment method, which comprises a sewage collecting device, an ozone micro-nano bubble forming device, a catalytic reaction device 1 and a tail gas treatment device.
The sewage collecting device is communicated with the ozone micro-nano bubble forming device through a first sewage inlet pipe 801.
The sewage collecting device is communicated with the catalytic reaction device 1 through a second sewage inlet pipe 702.
The ozone micro-nano bubble forming device is communicated with the catalytic reaction device 1 through an ozone micro-nano bubble water outlet pipe 802.
The catalytic reaction device 1 is communicated with the tail gas treatment device through a tail gas transmission pipe 901.
The sewage collecting apparatus includes a sewage pump 701 and a cartridge filter 7.
The output end of the sewage pump 701 is communicated with the input end of the security filter 7.
The output of the cartridge filter 7 includes a first output and a second output.
The first output end of the cartridge filter 7 is communicated with the ozone micro-nano bubble forming device through a first sewage inlet pipe 801.
The second output end of the cartridge filter 7 is communicated with the catalytic reaction device 1 through a second sewage inlet pipe 702.
The ozone micro-nano bubble forming device comprises an ozone generator 6 and a micro-nano bubble generator 8.
The input end of the ozone generator 6 is connected with an air source through a pure oxygen inlet pipe 601.
The output end of the ozone generator 6 is communicated with the micro-nano bubble generator 8 through an ozone transmission pipe 602.
The ozone transmission pipe 602 is provided with a second flow regulator 6021.
The first output end of the cartridge filter 7 is communicated with the micro-nano bubble generator 8 through the first sewage inlet pipe 801.
The first sewage inlet pipe 801 is provided with a first flow regulator 8011.
The output end of the micro-nano bubble generator 8 is communicated with the catalytic reaction device 1 through an ozone micro-nano bubble water outlet pipe 802.
The catalytic reaction device 1 is arranged in the reactor shell 12 and comprises a sewage inlet layer 13, a catalytic reaction layer 3 and a water outlet layer 2 from top to bottom.
The wastewater inlet layer 13 and the catalytic reaction layer 3 are separated by a packing support plate 301.
The packing support plate 301 carries a composite catalyst.
The filler bearing plate 301 is provided with filter holes.
The output end of the sewage inlet layer 13 is communicated with the catalytic reaction layer 3 through a first lifting pump 302.
The catalytic reaction layer 3 and the water outlet layer 2 are separated by a partition 201.
The partition board 201 is provided with a filtering hole.
The output end of the catalytic reaction layer 3 is communicated with the water outlet layer 2 through a second lift pump 202.
The second output end of the cartridge filter 7 is communicated with the sewage inlet layer 13 through a second sewage inlet pipe 702.
And a third flow regulator 7021 is arranged on the second sewage inlet pipe 702.
The output end of the micro-nano bubble generator 8 is communicated with the sewage inlet layer 13 through an ozone micro-nano bubble outlet pipe 802.
A fourth flow regulator 8021 is arranged on the ozone micro-nano bubble water outlet pipe 802.
The output end of the water outlet layer 2 comprises a first output end and a second output end.
The first output end of the water outlet layer 2 is connected with a water outlet discharge pipe 5.
The water outlet discharge pipe 5 is provided with a discharge control valve 501.
The second output end of the water outlet layer 2 is connected with a tail gas treatment device through a tail gas transmission pipe 901.
The output end of the water outlet layer 2 further comprises a third output end.
And the third output end of the water outlet layer 2 is connected with the sewage inlet layer 13 through a water outlet return pipe 4.
The water outlet return pipe 4 is provided with a return control valve 401 and a return pump 11.
The tail gas treatment device comprises a tail gas absorption tower 9.
The second output end of the water outlet layer 2 is connected to the tail gas absorption tower 9 through a tail gas transmission pipe 901.
The output end of the tail gas absorption tower 9 is connected with a tail gas discharge pipe 902.
The tail gas discharge pipe 902 is provided with a fan 10.
The ozone micro-nano bubble forming device adopts a submersible throttling air release micro-nano bubble generating method, utilizes back pressure generated by throttling liquid through the throttling hole to pressurize and dissolve air and water in the submersible pump, and utilizes negative pressure generated by the throat part when the throttling hole accelerates the liquid to flow to release dissolved air in the water to form micro-bubbles.
The advanced treatment method for sewage by heterogeneous composite catalytic oxidation is suitable for treating various organic wastewater, including drinking water containing organic pollutants, and is particularly suitable for organic wastewater generated in the industries of hospital wastewater, domestic wastewater, organic pesticides, petroleum refining, coal chemical industry, pharmacy and the like.
Example 1
The treatment method of the invention is used for treating the wastewater of a certain hospital, the COD concentration in the wastewater is 210 mg/L, the wastewater is treated by the method flow of the invention, and the selected catalyst carrier is gamma-Al2O3The active component is Mn-Ce-Cu, the weight ratio of Mn to Ce to Cu is 3:1:2, the flow rate of ozone is 1.0L/min, and the removal rate of COD concentration in the treated wastewater is 15 mg/L and reaches 92.86%.
Example 2
The treatment method of the invention is used for treating the wastewater of a certain chemical plant, the COD concentration in the wastewater is 1500 mg/L, the wastewater is treated by the method flow of the invention, and the selected catalyst carrier is gamma-Al2O3The weight ratio of Mn to Ce to Co is 5:2:3, the flow rate of ozone is 2.5L/min, and the removal rate of COD concentration in the treated wastewater is 30 mg/L and reaches 98%.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The advanced treatment method for heterogeneous composite catalytic oxidation sewage is characterized by comprising the following steps:
s1, pumping the pretreated sewage into a sewage collecting device to remove suspended matters and colloidal substances;
s2, mixing the effluent of the sewage collection device with ozone through an ozone micro-nano bubble forming device, allowing the effluent to enter a catalytic reaction device, reacting with a composite catalyst filled in the catalytic reaction device, removing toxic and harmful organic matters in the sewage after catalytic oxidation, reacting with the catalytic reaction device again if the treated sewage does not reach the standard, and discharging if the treated sewage reaches the standard;
and S3, filling the tail gas discharged from the outlet of the catalytic reaction device into a tail gas treatment device, heating and decomposing the ozone tail gas, and decomposing the ozone tail gas through a catalyst layer, wherein the treated tail gas reaches the standard and is discharged.
2. The advanced wastewater treatment method through heterogeneous composite catalytic oxidation according to claim 1, wherein the composite catalyst comprises a catalyst substrate and an active component;
the catalyst substrate comprises gamma-Al2O3；
The active component is based on Mn-Ce composite metal oxide and added with transition metal;
the transition metal comprises Cu, Fe, Ni, Co and Zn.
3. The advanced wastewater treatment method through heterogeneous composite catalytic oxidation according to claim 2, wherein the preparation method of the composite catalyst in S2 comprises the following steps:
s21, using an isometric immersion method, weighing nitrate and chloride salt of transition metal according to a ratio, adding water or ethanol or other organic solvents for dissolving, and preparing metal salt solution;
s22, adjusting the pH value of the metal salt solution to 11-13, uniformly stirring, and standing;
s23, taking gamma-Al2O3Soaking the ball in the metal salt solution for 10-15 hours;
s24, drying the gamma-Al2O3And (3) sintering the balls at a high temperature of 300-500 ℃ for 2-5 hours to obtain the composite catalyst.
4. The advanced wastewater treatment method through heterogeneous composite catalytic oxidation according to claim 1, wherein the mass fraction ratio of the ozone input amount to the COD removal amount in S2 is 0.4-1.
5. The advanced wastewater treatment system for heterogeneous composite catalytic oxidation, which is used for the advanced wastewater treatment method for heterogeneous composite catalytic oxidation according to any one of claims 1 to 4, is characterized by comprising a wastewater collection device, an ozone micro-nano bubble forming device, a catalytic reaction device and a tail gas treatment device;
the sewage collecting device is communicated with the ozone micro-nano bubble forming device through a first sewage inlet pipe;
the sewage collecting device is communicated with the catalytic reaction device through a second sewage inlet pipe;
the ozone micro-nano bubble forming device is communicated with the catalytic reaction device through an ozone micro-nano bubble water outlet pipe;
the catalytic reaction device is communicated with the tail gas treatment device through a tail gas transmission pipe.
6. The advanced wastewater treatment system according to claim 5, wherein the wastewater collection device comprises a wastewater pump and a cartridge filter;
the output end of the sewage pump is communicated with the input end of the security filter;
the output end of the cartridge filter comprises a first output end and a second output end;
the first output end of the cartridge filter is communicated with the ozone micro-nano bubble forming device through a first sewage inlet pipe;
and the second output end of the cartridge filter is communicated with the catalytic reaction device through a second sewage inlet pipe.
7. The advanced wastewater treatment system through heterogeneous composite catalytic oxidation according to claim 6, wherein the ozone micro-nano bubble forming device comprises an ozone generator and a micro-nano bubble generator;
the input end of the ozone generator is connected with an air source through a pure oxygen inlet pipe;
the output end of the ozone generator is communicated with the micro-nano bubble generator through an ozone transmission pipe;
the ozone transmission pipe is provided with a second flow regulator;
the first output end of the cartridge filter is communicated with the micro-nano bubble generator through the first sewage inlet pipe;
a first flow regulator is arranged on the first sewage inlet pipe;
the output end of the micro-nano bubble generator is communicated with the catalytic reaction device through an ozone micro-nano bubble outlet pipe.
8. The advanced wastewater treatment system through heterogeneous composite catalytic oxidation according to claim 7, wherein the catalytic reaction device is arranged in the reactor shell and comprises a wastewater inlet layer, a catalytic reaction layer and a water outlet layer from top to bottom;
the sewage inlet layer and the catalytic reaction layer are separated by a filler bearing plate;
the filler bearing plate is loaded with a composite catalyst;
the filler bearing plate is provided with filter holes;
the output end of the sewage inlet layer is communicated with the catalytic reaction layer through a first lifting pump;
the catalytic reaction layer and the water outlet layer are separated by a partition plate;
the partition board is provided with a filter hole;
the output end of the catalytic reaction layer is communicated with the water outlet layer through a second lifting pump;
the second output end of the cartridge filter is communicated with the sewage inlet layer through a second sewage inlet pipe;
a third flow regulator is arranged on the second sewage inlet pipe;
the output end of the micro-nano bubble generator is communicated with the sewage inlet layer through an ozone micro-nano bubble outlet pipe;
a fourth flow regulator is arranged on the ozone micro-nano bubble water outlet pipe;
the output end of the water outlet layer comprises a first output end and a second output end;
the first output end of the water outlet layer is connected with a water outlet discharge pipe;
a discharge control valve is arranged on the water outlet discharge pipe;
and the second output end of the water outlet layer is connected with a tail gas treatment device through a tail gas transmission pipe.
9. The advanced wastewater treatment system through heterogeneous composite catalytic oxidation according to claim 8, wherein the output end of the effluent layer further comprises a third output end;
the third output end of the water outlet layer is connected with the sewage inlet layer through a water outlet return pipe;
and a backflow control valve and a backflow pump are arranged on the water outlet backflow pipe.
10. The advanced wastewater treatment system through heterogeneous composite catalytic oxidation according to claim 8, wherein the tail gas treatment device comprises a tail gas absorption tower;
the second output end of the water outlet layer is connected with the tail gas absorption tower through a tail gas transmission pipe;
the output end of the tail gas absorption tower is connected with a tail gas discharge pipe;
and a fan is arranged on the tail gas discharge pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010337934.XA CN111392914A (en) | 2020-04-26 | 2020-04-26 | Heterogeneous composite catalytic oxidation sewage advanced treatment method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010337934.XA CN111392914A (en) | 2020-04-26 | 2020-04-26 | Heterogeneous composite catalytic oxidation sewage advanced treatment method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111392914A true CN111392914A (en) | 2020-07-10 |
Family
ID=71426654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010337934.XA Pending CN111392914A (en) | 2020-04-26 | 2020-04-26 | Heterogeneous composite catalytic oxidation sewage advanced treatment method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111392914A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112316673A (en) * | 2020-11-18 | 2021-02-05 | 湖南自然创造生物科技有限公司 | Odor and sewage treatment system |
| CN112591869A (en) * | 2020-11-21 | 2021-04-02 | 江西挺进环保科技有限公司 | Treatment method of organic wastewater |
| CN113769573A (en) * | 2021-08-26 | 2021-12-10 | 生态环境部华南环境科学研究所 | Method for removing NO and VOCs in flue gas |
| CN116282653A (en) * | 2023-02-10 | 2023-06-23 | 深圳瑞新达生态科技有限公司 | A landfill leachate oxidation treatment device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6403031B1 (en) * | 1998-06-18 | 2002-06-11 | Degremont | Method for mineralization of organic pollutants in water by catalytic ozonization |
| CN104891713A (en) * | 2015-06-23 | 2015-09-09 | 杭州大地环保工程有限公司 | Catalytic ozonation process for treatment of organic wastewater |
| CN105618080A (en) * | 2016-01-30 | 2016-06-01 | 凯姆德（北京）能源环境科技有限公司 | Ozone catalytic oxidation catalyst for treating reverse osmosis concentrated water and preparation method of catalyst |
-
2020
- 2020-04-26 CN CN202010337934.XA patent/CN111392914A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6403031B1 (en) * | 1998-06-18 | 2002-06-11 | Degremont | Method for mineralization of organic pollutants in water by catalytic ozonization |
| CN104891713A (en) * | 2015-06-23 | 2015-09-09 | 杭州大地环保工程有限公司 | Catalytic ozonation process for treatment of organic wastewater |
| CN105618080A (en) * | 2016-01-30 | 2016-06-01 | 凯姆德（北京）能源环境科技有限公司 | Ozone catalytic oxidation catalyst for treating reverse osmosis concentrated water and preparation method of catalyst |
Non-Patent Citations (1)
| Title |
|---|
| 浙江大学等: "《综合化学实验》", 31 July 2001, 高等教育出版社 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112316673A (en) * | 2020-11-18 | 2021-02-05 | 湖南自然创造生物科技有限公司 | Odor and sewage treatment system |
| CN112591869A (en) * | 2020-11-21 | 2021-04-02 | 江西挺进环保科技有限公司 | Treatment method of organic wastewater |
| CN112591869B (en) * | 2020-11-21 | 2023-02-17 | 江西挺进环保科技股份有限公司 | Treatment method of organic wastewater |
| CN113769573A (en) * | 2021-08-26 | 2021-12-10 | 生态环境部华南环境科学研究所 | Method for removing NO and VOCs in flue gas |
| CN113769573B (en) * | 2021-08-26 | 2023-08-04 | 生态环境部华南环境科学研究所 | Method for removing NO and VOCs in flue gas |
| CN116282653A (en) * | 2023-02-10 | 2023-06-23 | 深圳瑞新达生态科技有限公司 | A landfill leachate oxidation treatment device |
| CN116282653B (en) * | 2023-02-10 | 2024-12-24 | 深圳瑞新达生态科技有限公司 | Landfill site percolate oxidation treatment device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111392914A (en) | Heterogeneous composite catalytic oxidation sewage advanced treatment method and system | |
| CN106277589B (en) | A kind of system and method using iron carbon Fenton pretreatment-UBF-A/O processing waste water from dyestuff | |
| CN101580294B (en) | A method for heterogeneous catalytic ozone oxidation treatment of landfill leachate | |
| CN104671391B (en) | Ozone heterogeneous catalysis oxidization treatment device and technology for hardly degradable organic wastewater | |
| CN110372085A (en) | A kind of organic wastewater catalytic ozonation processing system and method | |
| CN105481177A (en) | Low-consumption nitrification and denitrification coal chemical wastewater advanced treatment device | |
| CN104591377B (en) | A kind of method utilizing ozonation aerated biofilter treatment of Nitrobenzene waste water and application thereof | |
| CN101863589A (en) | Method for advanced treatment of wastewater by using combination of catalytic ozonation and internal circulation biological filter | |
| CN106746034A (en) | A kind of device and method of two-stage gradient ozone catalytic fluidized bed deep treatment biochemical tail water | |
| CN114436457A (en) | Ozone catalytic oxidation air flotation integrated system and use method thereof | |
| CN109264845A (en) | A kind of device and method of reverse osmosis concentrated water organic matter and ammonia nitrogen removal simultaneously | |
| CN206512041U (en) | A kind of device of two-stage gradient ozone catalytic fluidized bed deep treatment biochemical tail water | |
| CN210286990U (en) | Organic sewage and waste gas integrated treatment device | |
| CN111744361B (en) | Pyridine waste gas advanced treatment device | |
| CN106810017A (en) | A kind of difficult degradation industrial organic waste water advanced treatment apparatus and technique | |
| CN114180706A (en) | Ozone catalytic oxidation wastewater treatment equipment and wastewater treatment method | |
| CN212549029U (en) | A device for advanced treatment of pyridine waste gas | |
| CN105541012A (en) | Sewage nitrogen and phosphorus removal device with internal circulating biological aerated filter | |
| CN212050886U (en) | Heterogeneous compound catalytic oxidation sewage advanced treatment system | |
| CN108275848A (en) | A kind of wastewater treatment integrating device and method | |
| CN108128925B (en) | Method for simultaneously removing COD (chemical oxygen demand) and total phosphorus | |
| CN210915723U (en) | Processing system of black and odorous water body | |
| CN111620434A (en) | Wastewater treatment device and method and application thereof | |
| CN216584371U (en) | Ozone catalytic oxidation waste water treatment equipment | |
| CN109734244A (en) | A kind of sewage treatment process based on Fenton catalysis oxidation and MABR |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |