CN115947444A - Advanced treatment device based on ozone and advanced wastewater treatment system - Google Patents
Advanced treatment device based on ozone and advanced wastewater treatment system Download PDFInfo
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- CN115947444A CN115947444A CN202310231146.6A CN202310231146A CN115947444A CN 115947444 A CN115947444 A CN 115947444A CN 202310231146 A CN202310231146 A CN 202310231146A CN 115947444 A CN115947444 A CN 115947444A
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 143
- 238000004065 wastewater treatment Methods 0.000 title claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- ARYKTOJCZLAFIS-UHFFFAOYSA-N hydrogen peroxide;ozone Chemical compound OO.[O-][O+]=O ARYKTOJCZLAFIS-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000002351 wastewater Substances 0.000 claims abstract description 46
- 238000006243 chemical reaction Methods 0.000 claims abstract description 34
- 239000007789 gas Substances 0.000 claims abstract description 25
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 80
- 230000003647 oxidation Effects 0.000 claims description 41
- 238000007254 oxidation reaction Methods 0.000 claims description 41
- 229940001584 sodium metabisulfite Drugs 0.000 claims description 21
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims description 19
- 235000010262 sodium metabisulphite Nutrition 0.000 claims description 19
- 239000007800 oxidant agent Substances 0.000 claims description 18
- 230000001590 oxidative effect Effects 0.000 claims description 18
- 239000004576 sand Substances 0.000 claims description 11
- 230000008030 elimination Effects 0.000 claims description 8
- 238000003379 elimination reaction Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 238000005273 aeration Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- WESWKIRSMKBCAJ-UHFFFAOYSA-N [F].[Fe] Chemical compound [F].[Fe] WESWKIRSMKBCAJ-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 12
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 8
- 239000010842 industrial wastewater Substances 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 125000004430 oxygen atom Chemical group O* 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 238000006385 ozonation reaction Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011064 split stream procedure Methods 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses an advanced treatment device and an advanced treatment system for wastewater based on ozone, which relate to the technical field of advanced treatment of industrial wastewater and solve the technical problem that the effluent of the treated wastewater still contains organic pollutants with certain concentration and which are not completely degraded; the advanced treatment device can be adopted for both ozone preoxidation and ozone-hydrogen peroxide in the working procedure, and comprises a reaction kettle, wherein a mixed flow component is arranged in the reaction kettle, a water distributor is arranged above the mixed flow component, an ejector mounting port is arranged below the mixed flow component, a water outlet is formed in the bottom of the reaction kettle, a tail gas exhaust port and a water inlet are formed in the top end of the reaction kettle, the water distributor is communicated with the water inlet of the reaction kettle, and organic pollutants in the wastewater can be thoroughly oxidized through the combination of mixed flow and plug flow.
Description
Technical Field
The invention relates to the technical field of advanced treatment of industrial wastewater, in particular to an ozone-based advanced treatment device and an advanced treatment system for wastewater.
Background
Ozone is an unstable, bluish gas with a particularly pungent odor at ambient temperature and pressure. Ozone has strong oxidation performance, has an oxidation potential of 2.07V in alkaline solution, and has the oxidation capacity second to fluorine and higher than chlorine and potassium permanganate. Based on the strong oxidizing property of ozone, the water can be automatically decomposed in a short time without secondary pollution, and is an ideal green oxidizing agent. Currently, ozonation and its derivative technologies are used in many water treatment projects. Because oxygen atoms in ozone molecules have strong electrophilicity or protonophilicity, nascent oxygen atoms generated by ozone decomposition can form hydroxyl radical OH with strong oxidation in water, the high activity of the oxygen atoms can be used for sterilization, disinfection, organic matter structure destruction and the like in water treatment, and byproducts of the oxygen atoms are nontoxic and basically free of secondary pollution. The ozone is mainly used for deodorization, decoloration, sterilization and removal of organic matters in the water treatment process.
Most of the ozone-hydrogen peroxide advanced wastewater treatment devices sold in the market at present are hollow tank bodies, and under the action of ozone bubbles, a top water body and a bottom water body are mixed in a convection mode, and a reactor is internally in a completely mixed flow state. The flow state type can fully mix ozone, hydrogen peroxide and organic matters; but also results in effluent that still contains a concentration of organic contaminants that are not completely degraded.
CN1296291C discloses a water treatment reaction unit of organic matter process of ozonization with hydrogen peroxide catalysis, and the structural feature of this device is: the hydrogen peroxide molecular permeable membrane is used for dividing the interior of the reactor into a reaction cavity and a hydrogen peroxide cavity, and a plurality of baffle plates which are arranged in a staggered mode are fixed on the inner wall of the reaction cavity. When the reactor operates, ozone is dispersed in the reaction cavity through the aeration head; the hydrogen peroxide permeates into the reaction cavity through the fine micropores uniformly distributed in the hydrogen peroxide molecular permeable membrane, so that the quenching between the hydroxyl radicals and the reaction quantity with the hydrogen peroxide are reduced. The existence of the baffle plate enables the water body to move upwards in a zigzag mode to form turbulent flow, so that the ozone and the hydrogen peroxide are mixed more fully. The baffle arranged in the ozone generator can cause ozone bubbles to accumulate and grow at the baffle, the ozone bubbles float upwards in a conglomeration manner, the gas-liquid mass transfer efficiency is reduced, and the ozone utilization rate is further reduced; and the water quality of the industrial wastewater is complex, carbonate generated by mineralization is combined with certain metal ions in the wastewater into slightly soluble or indissoluble salt, and the slightly soluble or indissoluble salt is possibly deposited on a hydrogen peroxide molecule permeable membrane to cause membrane blockage.
Based on UV/O 3 /H 2 O 2 When the reaction device of the process is used for deeply treating wastewater, the deposition of insoluble salt on the surface of the ultraviolet lamp tube can shield ultraviolet rays in a large quantity, and the use efficiency of a light source is reduced.
Disclosure of Invention
The invention aims to: the device for deeply treating the wastewater by using the ozone-hydrogen peroxide has the advantages of lower complexity of an internal structure, small maintenance difficulty and thorough oxidation of organic pollutants; and provides an industrial wastewater advanced treatment system based on the device.
The technical scheme adopted by the invention is as follows: an advanced treatment device based on ozone comprises a reaction kettle, wherein a mixed flow component is arranged in the reaction kettle, a water distributor is arranged above the mixed flow component, an ejector mounting port is arranged below the mixed flow component, a water outlet is formed in the bottom of the reaction kettle, a tail gas exhaust port and a water inlet are formed in the top end of the reaction kettle, and the water distributor is communicated with the water inlet of the reaction kettle; the mixed flow component comprises two A-type tower plates, two B-type tower plates and two C-type tower plates, wherein the two A-type tower plates are staggered with the two B-type tower plates and the two C-type tower plates; the diameters of the A-type tower plate, the B-type tower plate and the C-type tower plate are the same and are all provided with circular holes, the A-type tower plate is in a circular plate shape, the middle of the B-type tower plate is provided with a circular notch, the edge of the C-type tower plate is provided with four semicircular notches with the same specification, and the circular holes of the B-type tower plate and the C-type tower plate are internally provided with a one-way structure for allowing ozone bubbles to pass in one way; when the ozone bubbles float to a one-way structure, the floater is supported by buoyancy and enters the next layer of tower plate space; if no bubble floats upwards, the float blocks the holes of the tower plates through self weight, so that the wastewater of the upper tower plate layer cannot enter the next tower plate layer through the holes of the tower plates; one-way structure comprises infundibulate support, float, screen panel, and wherein the float is the teflon material, hollow structure, and the ratio of hollow volume and float total volume is 0.476, the one end and the circular hole intercommunication of infundibulate support have placed the float in this infundibulate support to spacing through the screen panel, when injecting into gas, blow up the float through gaseous, produce the ozone bubble, when closing gas, the hole is stopped up in the float falls into the infundibulate support, avoids waste water to discharge into the next floor through the hole.
Specifically, the wastewater is injected from the top of the reaction kettle, the ozone is injected from the bottom, and the gas and the liquid flow reversely; the wastewater enters the top of the reaction kettle and is dispersed by a water distributor; injecting ozone into the bottom of the reaction kettle through an ejector mounting port; between the adjacent two-layer column plate of mixed flow subassembly, come-up disturbance waste water through the ozone bubble, thereby make waste water be the flow state of complete mixing at reation kettle part, organic pollutant is degraded partly in the waste water, because be provided with single-way mechanism on the column plate hole, make waste water directly can't pass through the column plate hole, can only get into next column plate layer from the breach department of upper column plate, just so formed the series connection of a plurality of column plate layers, waste water flows to the in-process of bottom column plate layer from top column plate layer is final, organic pollutant's concentration degrades gradually, from whole, waste water is the flow state of plug flow.
The material of the mixed flow component is 304 or 316L stainless steel with the thickness of 5 mm.
A wastewater advanced treatment system comprises the advanced treatment device, and further comprises a sand filter, a pH adjusting tank, an ozone generator, an intermediate water tank, an oxidant eliminating tank, a tail gas destructor, a sodium metabisulfite storage tank, a hydrogen peroxide storage tank and a fan, wherein the advanced treatment device comprises two ozone preoxidation reactors and an ozone-hydrogen peroxide reactor respectively, a water inlet of each ozone preoxidation reactor is sequentially communicated with the pH adjusting tank and the sand filter, a jet device mounting port of each ozone preoxidation reactor is communicated with the ozone generator, a water outlet of each ozone preoxidation reactor is communicated with a water inlet of the ozone-hydrogen peroxide reactor through the intermediate water tank, a water outlet of each ozone-hydrogen peroxide reactor is communicated with the oxidant eliminating tank, a jet device mounting port of each ozone-hydrogen peroxide reactor is communicated with the ozone generator, and tail gas exhaust ports of the ozone preoxidation reactors and the ozone-hydrogen peroxide reactors are communicated with the tail gas destructors; a first water pump is arranged on a pipeline communicated with the pH adjusting tank and the ozone pre-oxidation reactor; a second water pump and a hydrogen peroxide pipeline mixer are arranged on a pipeline of the intermediate water tank communicated with the ozone-hydrogen peroxide reactor, and the hydrogen peroxide pipeline mixer is communicated with a hydrogen peroxide storage tank; a sodium metabisulfite pipeline mixer is arranged on a pipeline communicated with the ozone-hydrogen peroxide reactor and the oxidant elimination pool, and is communicated with a sodium metabisulfite storage tank; and the aeration equipment at the bottom of the oxidant elimination tank is communicated with a fan.
The specific process is as follows: the method comprises the steps of discharging water from a secondary sedimentation tank, filtering with sand, adjusting a pH value tank, pre-oxidizing with ozone, filtering with a biological filter, ozone-hydrogen peroxide and eliminating with residual oxidant; the advanced treatment device can be used for both the ozone pre-oxidation and the ozone-hydrogen peroxide in the process.
When the advanced treatment device is used for ozone pre-oxidation, the hydraulic retention time is 40 to 60min, and the ozone adding amount is 20 to 40mg/L water.
When the advanced treatment device is used for ozone-hydrogen peroxide, the hydraulic retention time is 40-60min, the adding amount of ozone is 80-100mg/L water, and the adding mass of hydrogen peroxide is 0.2-0.4 time of that of ozone.
And a second metering pump is arranged on an outlet pipeline of the sodium metabisulfite storage tank, and a first metering pump is arranged on an outlet pipeline of the hydrogen peroxide storage tank.
The device comprises an ozone generator, an ozone pre-oxidation reactor, a first ejector, a valve and a third water pump, wherein the first ejector is arranged on a pipeline between the ozone generator and the ozone pre-oxidation reactor, one end of the first ejector is communicated with an ejector mounting hole of the ozone pre-oxidation reactor, the other end of the first ejector is communicated with a water outlet of the ozone pre-oxidation reactor, the middle end of the first ejector is communicated with the ozone generator, the valve and the third water pump are sequentially arranged on a pipeline communicated with the water outlet of the ozone pre-oxidation reactor, and the valve is arranged on a pipeline communicated with the ejector mounting hole of the ozone pre-oxidation reactor.
A second ejector is arranged on a pipeline between the ozone generator and the ozone pre-oxidation reactor, one end of the second ejector is communicated with an ejector mounting port of the ozone-hydrogen peroxide reactor, the other end of the second ejector is communicated with a water outlet of the ozone-hydrogen peroxide reactor, the middle end of the second ejector is communicated with the ozone generator, a valve and a fourth water pump are sequentially arranged on the pipeline through which the second ejector is communicated with the water outlet of the ozone-hydrogen peroxide reactor, and a valve is arranged on the pipeline through which the second ejector is communicated with the ejector mounting port of the ozone-hydrogen peroxide reactor.
The air outlet end of the ozone generator is also provided with a gas flowmeter.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the invention combines the staggered arrangement of the three types of column plates A, B and C and the one-way structure on the column plate holes, so that the wastewater is in a completely mixed flow state locally in the reactor and in a plug flow state integrally when passing through the reactor. Through the combination of the mixed flow and the plug flow, organic pollutants in the wastewater can be thoroughly oxidized.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the structure of an ozone-based advanced treatment device, a type A tray, a type B tray and a type C tray;
FIG. 2 is a schematic cross-sectional view of the ejector mount of the present invention;
FIG. 3 is a schematic structural view of a one-way mechanism at a tray hole of the present invention;
FIG. 4 is a view of a net cover of the one-way mechanism at the tray hole of the present invention;
FIG. 5 is a schematic view of the wastewater advanced treatment system according to the present invention;
FIG. 6 is a block diagram of an advanced wastewater treatment system according to the present invention;
labeled as: 1-sand filter, 2-pH adjusting tank, 3-ozone generator, 4 a-ozone pre-oxidation reactor, 4B-ozone-hydrogen peroxide reactor, 5-intermediate water tank, 6-oxidant eliminating tank, 7-tail gas destroyer, 8-sodium metabisulfite storage tank, 9-hydrogen peroxide storage tank, 10 a-hydrogen peroxide pipeline mixer, 10B-sodium metabisulfite pipeline mixer, 11 a-first ejector, 11B-second ejector, 12 a-first water pump, 12B-second water pump, 13 a-first metering pump, 13B-second metering pump, 14-fan, 14 a-third water pump, 14B-fourth water pump, 401-water outlet, 402-ejector installation port, 403-tail gas exhaust port, 404-water inlet, 405-water distributor, 406-A type tray, 407-B type tray, 408-C type tray, 409-reactor tray, L1-tray, L2-funnel-shaped support, L3-float, L4-mesh enclosure.
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 may 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.
Example 1
As shown in fig. 1 to 6, the present embodiment provides an ozone-based advanced treatment device, including a reaction kettle 409, a mixed flow component is disposed in the reaction kettle 409, a water distributor 405 is disposed above the mixed flow component, an ejector mounting port 402 is disposed below the mixed flow component, 4 ejector mounting ports 402 are disposed, and the mixed flow component is distributed on the outer wall of the reaction kettle 409 in a cross shape; a water outlet 401 is formed in the bottom of the reaction kettle 409, a tail gas exhaust port 403 and a water inlet 404 are formed in the top end of the reaction kettle 409, and the water distributor 405 is communicated with the water inlet 404 of the reaction kettle 409; the mixed flow component comprises an A-type tower plate 406, a B-type tower plate 407 and a C-type tower plate 408, the number of the A-type tower plates 406 is two, and the B-type tower plate 407 and the C-type tower plate 408 are arranged between the two A-type tower plates 406 in a staggered manner; the diameters of the A-type tower plate 406, the B-type tower plate 407 and the C-type tower plate 408 are the same and are all provided with circular holes, the A-type tower plate 406 is in a circular plate shape, the middle of the B-type tower plate 407 is provided with a circular notch, the edge of the C-type tower plate 408 is provided with four semicircular notches with the same specification, wherein the circular holes of the B-type tower plate 407 and the C-type tower plate 408 are internally provided with a one-way structure for allowing ozone bubbles to pass in one way; when the ozone bubbles float to a one-way structure, the floater L3 is supported by buoyancy and enters the next layer of tower plate space; if no bubble floats upwards, the floater L3 blocks the holes of the tower plates through self weight, so that the wastewater of the upper tower plate layer cannot enter the next tower plate layer through the holes of the tower plates; unidirectional structure comprises infundibulate support L2, float L3, screen panel L4, and wherein float L3 is the iron fluorine dragon material, hollow structure, and the ratio of hollow volume and float L3 total volume is 0.476, infundibulate support L2's one end and circular hole intercommunication have placed float L3 in this infundibulate support L2 to it is spacing through screen panel L4, when ozone bubble come-up to float department, through buoyancy with float L3 jack-up, when no ozone bubble, float L3 blocks up the hole in falling into infundibulate support L2 under the dead weight effect, prevents that waste water directly gets into next tower board layer through the hole.
Specifically, the wastewater is injected from the top of the reaction kettle 409, the ozone is injected from the bottom, and the gas and the liquid flow reversely; the wastewater enters the top of the reaction kettle 409 and is dispersed by a water distributor 405; ozone is injected into the bottom of the reaction kettle 409 through the ejector mounting port 402; between the adjacent two-layer column plate of mixed flow subassembly, come-up disturbance waste water through the ozone bubble, thereby make waste water be the flow state of complete mixing at reation kettle 409 part, organic pollutant is degraded partly in the waste water, because be provided with single-way mechanism on the column plate hole, make waste water directly can't pass through the column plate hole, can only get into next column plate layer from the breach department of upper column plate, just so formed the series connection of a plurality of column plate layers, waste water flows to the in-process of bottom column plate layer from top column plate layer is final, organic pollutant's concentration degrades gradually, from whole, waste water is the flow state of plug flow.
Example 2
On the basis of the embodiment 1, the material of the mixed flow component is 304 or 316L stainless steel with the thickness of 5 mm.
Example 3
On the basis of embodiment 1 or 2, a wastewater advanced treatment system comprises the advanced treatment device, and further comprises a sand filter 1, a pH adjusting tank 2, an ozone generator 3, an intermediate water tank 5, an oxidant eliminating tank 6, a tail gas destructor 7, a sodium metabisulfite storage tank 8, a hydrogen peroxide storage tank 9 and a fan 14, wherein the advanced treatment device comprises two ozone preoxidation reactors 4a and two ozone-hydrogen peroxide reactors 4b, a water inlet 404 of the ozone preoxidation reactor 4a is communicated with the pH adjusting tank 2 and the sand filter 1 in sequence, an ejector mounting port 402 of the ozone preoxidation reactor 4a is communicated with the ozone generator 3, a water outlet 401 of the ozone preoxidation reactor 4a is communicated with a water inlet 404 of the ozone-hydrogen peroxide reactor 4b through the intermediate water tank 5, a water outlet 401 of the ozone-hydrogen peroxide reactor 4b is communicated with the oxidant eliminating tank 6, an ejector mounting port 402 of the ozone-hydrogen peroxide reactor 4b is communicated with the ozone generator 3, and an exhaust port 403 of the ozone-hydrogen peroxide reactor 4b is communicated with an exhaust port 7; a first water pump 12a is arranged on a pipeline which communicates the pH adjusting tank 2 with the ozone pre-oxidation reactor 4 a; a second water pump 12b and a hydrogen peroxide pipeline mixer 10a are arranged on a pipeline of the intermediate water tank 5 communicated with the ozone-hydrogen peroxide reactor 4b, and the hydrogen peroxide pipeline mixer 10a is communicated with a hydrogen peroxide storage tank 9; a sodium metabisulfite pipeline mixer 10b is arranged on a pipeline for communicating the ozone-hydrogen peroxide reactor 4b with the oxidant elimination pool 6, and the sodium metabisulfite pipeline mixer 10b is communicated with a sodium metabisulfite storage tank 8; the aeration device at the bottom of the oxidant elimination pool 6 is communicated with a fan 14.
The specific process is as follows: the method comprises the steps of discharging water from a secondary sedimentation tank, filtering with sand, adjusting a pH value tank, pre-oxidizing with ozone, filtering with a biological filter, ozone-hydrogen peroxide and eliminating with residual oxidant; the ozone preoxidation and the ozone-hydrogen peroxide in the working procedure can adopt the advanced treatment device, and the ozone is prepared by pure oxygen sources.
When the advanced treatment device is used for ozone pre-oxidation, the hydraulic retention time is 40 to 60min, and the ozone adding amount is 20 to 40mg/L water.
When the advanced treatment device is used for ozone-hydrogen peroxide, the hydraulic retention time is 40-60min, the adding amount of ozone is 80-100mg/L water, and the adding mass of hydrogen peroxide is 0.2-0.4 time of that of ozone.
The working principle is as follows: when the system is operated, the effluent of biochemical treatment firstly enters a sand filter 1 to remove micro suspended matters, and then the effluent of the sand filter 1 enters a pH adjusting tank 2 to adjust the pH of a water body to a set value; the effluent of the pH adjusting tank 2 is pumped to the top of the ozone pre-oxidation reactor 4a through a first water pump 12a, and flows out from the bottom of the ozone pre-oxidation reactor 4a after being treated; the effluent at the bottom of the ozone pre-oxidation reactor 4a is divided, part of the effluent is used as the influent water of the first ejector 11a, and the rest of the effluent flows to the intermediate water tank 5 to wait for the subsequent treatment. The effluent of the intermediate water tank 5 is pumped to the top of the ozone-hydrogen peroxide reactor 4b by a second water pump 12 b; similarly, the bottom effluent of the ozone-hydrogen peroxide reactor 4b is split, part of the split stream is used as the feed water of the second ejector 11b, and the rest flows to the oxidant elimination pool 6.
When the system is operated, ozone gas flows from the ozone generator 3 to the air inlets of the first ejector 11a and the second ejector 11b, is converted into ozone bubbles with the average diameter of 100 mu m by the first ejector 11a and the second ejector 11b, and enters the ozone pre-oxidation reactor 4a and the ozone-hydrogen peroxide reactor 4b. The treated tail gas is led out from the top of the ozone pre-oxidation reactor 4a and the top of the ozone-hydrogen peroxide reactor 4b and flows into a tail gas destructor.
When the system is operated, hydrogen peroxide in the hydrogen peroxide storage tank 9 is pumped into the hydrogen peroxide pipeline mixer 10a through the first metering pump 13a at a specific flow rate, is mixed with the effluent of the ozone pre-oxidation reactor 4a in the hydrogen peroxide pipeline mixer, and flows into the ozone-hydrogen peroxide reactor 4b.
When the system is in operation, the sodium metabisulfite aqueous solution in the sodium metabisulfite storage tank 8 is pumped into the sodium metabisulfite pipeline mixer 10b through the second metering pump 13b at a specific flow rate, and is mixed with the effluent of the ozone-hydrogen peroxide reactor 4b in the sodium metabisulfite pipeline mixer 10b, so that residual ozone and hydrogen peroxide in the effluent of the ozone-hydrogen peroxide reactor 4b are eliminated.
When the system is in operation, the blower 14 continuously blows air into the oxidizer removal tank 6 to remove the sodium metabisulfite which is not completely consumed in the water body.
Example 4
On the basis of embodiment 3, the outlet pipeline of the sodium metabisulfite storage tank 8 is provided with a second metering pump 13b, and the outlet pipeline of the hydrogen peroxide storage tank 9 is provided with a first metering pump 13a.
Example 5
In addition to embodiment 3, a first ejector 11a is disposed on the pipeline between the ozone generator 3 and the ozone pre-oxidation reactor 4a, the first ejector 11a is a three-way structure, one end of the first ejector 11a is communicated with an ejector mounting port 402 of the ozone pre-oxidation reactor 4a, the other end of the first ejector 11a is communicated with a water outlet 401 of the ozone pre-oxidation reactor 4a, and the middle end of the first ejector 11a is communicated with the ozone generator 3, wherein a valve and a third water pump 14a are sequentially disposed on the pipeline between the first ejector 11a and the water outlet 401 of the ozone pre-oxidation reactor 4a, and a valve is disposed on the pipeline between the first ejector 11a and the ejector mounting port 402 of the ozone pre-oxidation reactor 4 a.
Example 6
On the basis of embodiment 3, a second ejector 11b is arranged on the pipeline between the ozone generator 3 and the ozone pre-oxidation reactor 4a, the second ejector 11b is of a three-way structure, one end of the second ejector 11b is communicated with an ejector mounting port 402 of the ozone-hydrogen peroxide reactor 4b, the other end of the second ejector 11b is communicated with a water outlet 401 of the ozone-hydrogen peroxide reactor 4b, the middle end of the second ejector 11b is communicated with the ozone generator 3, wherein a valve and a fourth water pump 14b are sequentially arranged on the pipeline through which the second ejector 11b is communicated with the water outlet 401 of the ozone-hydrogen peroxide reactor 4b, and a valve is arranged on the pipeline through which the second ejector 11b is communicated with the ejector mounting port 402 of the ozone-hydrogen peroxide reactor 4b.
Example 7
On the basis of the embodiment 3, the gas outlet end of the ozone generator 3 is also provided with a gas flowmeter.
Application example 1
The deep treatment object is the Chinese medicine extraction pharmaceutical wastewater after biochemical treatment, the COD is 90 to 130mg/L, the water body is tan, and the water body contains trace suspended matters.
After the wastewater is filtered, ozone pre-oxidation is firstly carried out, and the adding amount of the part of ozone is 30mg/L water; then adjusting the pH value to 8.0, and adding hydrogen peroxide, wherein the adding amount of the hydrogen peroxide is 20mg/L of water; finally, the wastewater is pumped into an ozone-hydrogen peroxide reactor 4b, and the adding amount of ozone is 80mg/L water. Finally, the COD of the filtered effluent is 90 to 100mg/L, the COD of the ozone preoxidation effluent is 75 to 80mg/L, the COD of the ozone-hydrogen peroxide effluent is 40 to 60mg/L, and the chroma is lower than 50PCU.
Application example 2
The advanced treatment object is coking wastewater after biochemical treatment, COD is 210-250mg/L, a water body is tan, and the water body contains trace suspended matters.
After flocculation treatment, ozone pre-oxidation is firstly carried out on the wastewater, and the adding amount of the ozone is 40mg/L water; then adjusting the pH value to 7.5, and adding hydrogen peroxide, wherein the adding amount of the hydrogen peroxide is 30mg/L of water; finally, the wastewater is pumped into an ozone-hydrogen peroxide reactor 4b, and the adding amount of the part of ozone is 90mg/L water. Finally, the COD of the filtered effluent is 180 to 210mg/L, the COD of the ozone preoxidation effluent is 140 to 160mg/L, and the COD of the ozone-hydrogen peroxide effluent is 80 to 100mg/L.
Application example 3
The deep treatment object is fine chemical wastewater after biochemical treatment, and the COD is 90 to 110mg/L.
After the wastewater is filtered, ozone pre-oxidation is firstly carried out, and the adding amount of the part of ozone is 40mg/L water; then adjusting the pH value to 8.5, and adding hydrogen peroxide, wherein the adding amount of the hydrogen peroxide is 30mg/L of water; finally, the wastewater is pumped into an ozone-hydrogen peroxide reactor 4b, and the adding amount of the part of ozone is 60mg/L water. Finally, the COD of the filtered effluent is 80-90mg/L, the COD of the ozone preoxidation effluent is 70-80mg/L, and the COD of the ozone-hydrogen peroxide effluent is 35-50mg/L.
Application example 4
The advanced treatment object is papermaking wastewater after biochemical treatment, COD is 150-230mg/L, the water body is tan, and the water body contains a large amount of wood fibers.
After flocculation treatment, ozone pre-oxidation is carried out on the wastewater, and the adding amount of the part of ozone is 20mg/L water; then adjusting the pH value to 8.5, and adding hydrogen peroxide, wherein the adding amount of the hydrogen peroxide is 20mg/L of water; finally, the wastewater is pumped into an ozone-hydrogen peroxide reactor 4b, and the adding amount of the part of ozone is 60mg/L water. Finally, the COD of the filtered effluent is 90 to 110mg/L, the COD of the ozone preoxidation effluent is 75 to 85mg/L, and the COD of the ozone-hydrogen peroxide effluent is 40 to 50mg/L.
Claims (7)
1. The advanced treatment device based on ozone comprises a reaction kettle (409) and is characterized in that a mixed flow component is arranged in the reaction kettle (409), a water distributor (405) is arranged above the mixed flow component, a jet device mounting port (402) is arranged below the mixed flow component, a water outlet (401) is formed in the bottom of the reaction kettle (409), a tail gas exhaust port (403) and a water inlet (404) are formed in the top end of the reaction kettle (409), and the water distributor (405) is communicated with the water inlet (404) of the reaction kettle (409); the mixed flow component comprises A-type tower plates (406), B-type tower plates (407) and C-type tower plates (408), two A-type tower plates (406) are arranged, and the B-type tower plates (407) and the C-type tower plates (408) are arranged between the two A-type tower plates (406) in a staggered manner; the diameter of the A-type tower plate (406), the diameter of the B-type tower plate (407) and the diameter of the C-type tower plate (408) are the same, circular holes are formed in the A-type tower plate (406) and the C-type tower plate (408), the A-type tower plate (406) is in a circular plate shape, a circular notch is formed in the middle of the B-type tower plate (407), four semicircular notches with the same specification are formed in the edge of the C-type tower plate (408), and the circular holes of the B-type tower plate (407) and the C-type tower plate (408) are internally provided with a one-way structure; unidirectional structure comprises infundibulate support (L2), float (L3), screen panel (L4), and wherein float (L3) are the iron fluorine dragon material, and hollow structure, the ratio of hollow volume and float (L3) total volume is 0.476, float (L3) have been placed in this infundibulate support (L2) to the one end and the circular hole intercommunication of infundibulate support (L2) to it is spacing through screen panel (L4).
2. The ozone-based advanced treatment unit of claim 1, wherein the mixed flow component is made of 304 or 316L stainless steel with a thickness of 5 mm.
3. An advanced wastewater treatment system, which comprises the advanced wastewater treatment device of claim 1 or 2, and is characterized in that the advanced wastewater treatment system further comprises a sand filter (1), a pH adjusting tank (2), an ozone generator (3), an intermediate water tank (5), an oxidant eliminating tank (6), a tail gas destroyer (7), a sodium metabisulfite storage tank (8), a hydrogen peroxide storage tank (9) and a fan (14), wherein the advanced wastewater treatment device is provided with two ozone preoxidation reactors (4 a) and an ozone-hydrogen peroxide reactor (4 b), a water inlet (404) of the ozone preoxidation reactor (4 a) is communicated with the pH adjusting tank (2) and the sand filter (1) in sequence, a jet device mounting port (402) of the ozone preoxidation reactor (4 a) is communicated with the ozone generator (3), a water outlet (401) of the ozone preoxidation reactor (4 a) is communicated with a water inlet (404) of the ozone-hydrogen peroxide reactor (4 b) through the intermediate water tank (5), an ozone elimination reactor (4 b) is communicated with a water outlet (401) of the ozone-hydrogen peroxide reactor (4 b) through the oxidant eliminating tank (6), and an exhaust port of the ozone-hydrogen peroxide reactor (4 a) is communicated with a jet device (3) through the ozone generator (4 b), and an exhaust port of the ozone-hydrogen peroxide reactor (4 b) through the ozone preoxidation reactor (4 a) and an ozone jet device mounting port (4 b), and an exhaust port of the ozone jet device mounting port of the ozone generator (4 b) are communicated with the ozone jet device (3), and an exhaust port of the ozone jet device (4 b) respectively 403 All are communicated with a tail gas destructor (7); a first water pump (12 a) is arranged on a pipeline which is communicated with the pH adjusting tank (2) and the ozone pre-oxidation reactor (4 a); a second water pump (12 b) and a hydrogen peroxide pipeline mixer (10 a) are arranged on a pipeline of the intermediate water tank (5) communicated with the ozone-hydrogen peroxide reactor (4 b), and the hydrogen peroxide pipeline mixer (10 a) is communicated with a hydrogen peroxide storage tank (9); a sodium metabisulfite pipeline mixer (10 b) is arranged on a pipeline for communicating the ozone-hydrogen peroxide reactor (4 b) with the oxidant elimination pool (6), and the sodium metabisulfite pipeline mixer (10 b) is communicated with a sodium metabisulfite storage tank (8); and the aeration equipment at the bottom of the oxidant elimination pool (6) is communicated with a fan (14).
4. An advanced wastewater treatment system according to claim 3, characterized in that the outlet pipe of the sodium metabisulfite storage tank (8) is provided with a second metering pump (13 b), and the outlet pipe of the hydrogen peroxide storage tank (9) is provided with a first metering pump (13 a).
5. A wastewater advanced treatment system according to claim 3, characterized in that a first jet device (11 a) is arranged on the pipeline between the ozone generator (3) and the ozone pre-oxidation reactor (4 a), the first jet device (11 a) is of a three-way structure, one end of the first jet device (11 a) is communicated with a jet device mounting port (402) of the ozone pre-oxidation reactor (4 a), the other end of the first jet device (11 a) is communicated with a water outlet (401) of the ozone pre-oxidation reactor (4 a), the middle end of the first jet device (11 a) is communicated with the ozone generator (3), wherein a valve and a third water pump (14 a) are sequentially arranged on the pipeline through which the first jet device (11 a) is communicated with the water outlet (401) of the ozone pre-oxidation reactor (4 a), and a valve is arranged on the pipeline through which the first jet device (11 a) is communicated with the jet device mounting port (402) of the ozone pre-oxidation reactor (4 a).
6. The advanced wastewater treatment system according to claim 3, characterized in that a second ejector (11 b) is arranged on the pipeline between the ozone generator (3) and the ozone pre-oxidation reactor (4 a), the second ejector (11 b) is of a three-way structure, one end of the second ejector (11 b) is communicated with an ejector mounting port (402) of the ozone-hydrogen peroxide reactor (4 b), the other end of the second ejector (11 b) is communicated with a water outlet (401) of the ozone-hydrogen peroxide reactor (4 b), the middle end of the second ejector (11 b) is communicated with the ozone generator (3), wherein a valve and a fourth water pump (14 b) are sequentially arranged on the pipeline of the second ejector (11 b) communicated with the water outlet (401) of the ozone-hydrogen peroxide reactor (4 b), and a valve is arranged on the pipeline of the second ejector (11 b) communicated with the ejector mounting port (402) of the ozone-hydrogen peroxide reactor (4 b).
7. A wastewater advanced treatment system according to claim 3, characterized in that the gas outlet end of the ozone generator (3) is also provided with a gas flow meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310231146.6A CN115947444A (en) | 2023-03-13 | 2023-03-13 | Advanced treatment device based on ozone and advanced wastewater treatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310231146.6A CN115947444A (en) | 2023-03-13 | 2023-03-13 | Advanced treatment device based on ozone and advanced wastewater treatment system |
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| CN210993059U (en) * | 2019-08-14 | 2020-07-14 | 天大津康(天津)科技股份有限公司 | High-efficient rectifying column tower board subassembly |
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Application publication date: 20230411 |