CN111704232A - Ozone disinfection method and equipment for water - Google Patents
Ozone disinfection method and equipment for water Download PDFInfo
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- CN111704232A CN111704232A CN202010481937.0A CN202010481937A CN111704232A CN 111704232 A CN111704232 A CN 111704232A CN 202010481937 A CN202010481937 A CN 202010481937A CN 111704232 A CN111704232 A CN 111704232A
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- water
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- 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
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- 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
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- 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
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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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
- 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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention relates to the technical field of water treatment, in particular to an ozone disinfection method and equipment for water, which comprises the following process steps: firstly, preparing 30% high-concentration ozone gas; secondly, introducing the high-concentration ozone gas prepared in the first step into a multi-stage aeration disinfection reaction kettle; thirdly, injecting water to be disinfected into a water path of the multi-stage aeration disinfection reaction kettle; step four, introducing high-concentration ozone gas into the multi-stage aeration disinfection reaction kettle step by step to disinfect water, reducing the diameter of bubbles step by step, dissolving ozone step by step and reducing the concentration of ozone; and fifthly, passing the ozone after the last stage of aeration through a catalyst to convert the residual ozone into oxygen, wherein the concentration of the ozone is reduced to a national standard allowable value. The method and the equipment provided by the invention have the advantages of low operation cost, convenient preparation, good disinfection effect, high treatment efficiency and no ozone residue in water.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a method and equipment for disinfecting water by ozone.
The water disinfection, sterilization and deodorization technology is widely used in industrial production and people's life, but the water treatment technology has the problems of residual disinfectant, low operation efficiency or high operation cost, and the like, and the following technologies are mostly adopted in the current water treatment: 1. chlorine disinfection; 2. sterilizing with chlorine dioxide; 3. ozone disinfection; 4. sterilizing with ultraviolet rays; 5. and (4) disinfecting with sodium hypochlorite. Chlorine is dissolved in water, the dissolution concentration needs to be controlled, the disinfection effect is difficult to achieve when the concentration is low, chloride ions are left, the harmless treatment of substances such as heavy metal ions in the sewage is increased, and the chlorine can be remained in the drinking water for a long time; chlorine dioxide also makes it difficult to solve the problem of disinfectant residue; the ozone disinfection at the present stage is common concentration ozone disinfection, the operation efficiency is relatively low, and the equipment investment is large; the ultraviolet disinfection equipment is relatively complex and needs to strictly control the wavelength and the irradiation intensity of ultraviolet rays; hypochlorite is very stable and remains in nature for a long time after use.
Disclosure of Invention
The invention aims to solve the technical problem of providing a water ozone disinfection method and equipment which have the advantages of low operation cost, convenient preparation, good disinfection effect, high treatment efficiency and no ozone residue in water.
The invention is realized by the following technical scheme:
a method for ozone disinfection of water, comprising the following process steps:
firstly, preparing 30% high-concentration ozone gas;
secondly, introducing the high-concentration ozone gas prepared in the first step into a multi-stage aeration disinfection reaction kettle;
thirdly, injecting water to be disinfected into a water path of the multi-stage aeration disinfection reaction kettle;
step four, introducing high-concentration ozone gas into the multi-stage aeration disinfection reaction kettle step by step to disinfect water, reducing the diameter of bubbles step by step, dissolving ozone step by step and reducing the concentration of ozone;
and fifthly, passing the ozone after the last stage of aeration through a catalyst to convert the residual ozone into oxygen, wherein the concentration of the ozone is reduced to a national standard allowable value.
Further, water to be disinfected is injected into the waterway of the multi-stage aeration disinfection reaction kettle at equal pressure.
Furthermore, the multi-stage aeration reaction kettles are arranged at equal intervals in the horizontal direction, and every two adjacent stages are gradually raised and have the same height difference.
An ozone disinfection device for water comprises a first-stage sedimentation tank, an ozone generation pile, a plurality of stages of ozone aeration reaction kettles, a second-stage sedimentation tank and a catalytic converter, wherein a plurality of water outlets are formed in the first-stage sedimentation tank, a plurality of water inlets are formed in the second-stage sedimentation tank, the plurality of stages of ozone aeration reaction kettles are arranged in an equidistant manner in the horizontal direction, each two adjacent stages are gradually raised and have the same height difference, one end of each stage of ozone aeration reaction kettle is provided with a reaction kettle water inlet, the other end of each stage of ozone aeration reaction kettle is provided with a reaction kettle water outlet, the bottom of each stage of ozone aeration reaction kettle in the extension direction is provided with a plurality of ozone inlets, the top of each stage of ozone aeration reaction kettle is provided with a plurality of ozone outlets, the reaction kettle water inlets and the reaction kettle water outlets are both close to the lower part of the reaction kettle, ozone import of first order ozone aeration reation kettle takes place the ozone export intercommunication of piling up with ozone through ozone pipeline respectively, and the ozone export of last order ozone aeration reation kettle passes through ozone pipeline intercommunication with the ozone import of next order ozone aeration reation kettle respectively, and each ozone import department installs the ozone shower nozzle, and the ozone shower nozzle fumarole diameter of next order is less than last order ozone shower nozzle fumarole diameter, and the ozone export of last order ozone aeration reation kettle and catalyst converter intercommunication.
Furthermore, a plurality of water outlets on the primary sedimentation tank are gradually increased and are the same as the height difference of the corresponding water inlets of the reaction kettle.
Further, each level of ozone pipeline inlet and outlet is provided with a reverse trap.
Advantageous effects of the invention
The ozone disinfection method and the equipment for water, which are protected by the invention, have the following characteristics and advantages:
the method is characterized in that:
1. ozone gas is easier to prepare than chlorine gas, the preparation cost is lower, and the water dissolving and disinfecting capability is far better than that of chlorine gas;
2. the multi-stage parallel water treatment improves the treatment rate;
3. catalyzing waste gas to reach the requirement of national standard.
The advantages are that:
1. the running cost (the cost of water treatment in unit volume) of the water treatment equipment adopting the disinfection technology is obviously reduced;
2. the water disinfection technology uses ozone as a disinfectant, has no residue in water, and is more environment-friendly;
3. the high-concentration ozone greatly improves the disinfection efficiency;
4. the multi-stage aeration fully improves the utilization rate of ozone, so that the whole equipment is more compact;
5. the water treatment equipment adopting the technology has stable and reliable operation and easy maintenance.
Drawings
FIG. 1 is a schematic diagram of the ozone disinfection principle of water according to the present invention;
FIG. 2 is a schematic diagram of the apparatus of the present invention;
in the figure, 1, a first-stage sedimentation tank, 2, an ozone generation pile, 3, an ozone pipeline, 4, an ozone aeration reaction kettle, 5, a second-stage sedimentation tank and 6, a water return bend are arranged.
Detailed Description
A method for ozone disinfection of water, comprising the following process steps:
firstly, preparing 30% high-concentration ozone gas; the ozone generator is used for preparing high-concentration ozone gas by adopting an electrolytic high-concentration ozone preparation technology, and the ozone generator is easy to prepare and low in preparation cost.
Secondly, introducing the high-concentration ozone gas prepared in the first step into a multi-stage aeration disinfection reaction kettle; because the water to be treated in the sedimentation tank is gradually reduced from low to high concentration, the multi-stage aeration disinfection reaction kettle is adopted, the ozone concentration at the bottom layer is high, and the mode of gradual decrease is adopted, so that the utilization rate of ozone is improved, and the treatment efficiency is improved.
Thirdly, injecting water to be disinfected into a water path of the multi-stage aeration disinfection reaction kettle;
step four, introducing high-concentration ozone gas into the multi-stage aeration disinfection reaction kettle step by step to disinfect water, reducing the diameter of bubbles step by step, dissolving ozone step by step and reducing the concentration of ozone; the utilization rate of ozone is improved, the treatment efficiency is improved, no residue is left in water, and the ozone treatment device is more environment-friendly.
And fifthly, passing the ozone after the last stage of aeration through a catalyst to convert the residual ozone into oxygen, wherein the concentration of the ozone is reduced to a national standard allowable value. After the gradual aeration disinfection, the concentration of the last stage of ozone is reduced to the minimum, and the concentration of the ozone is very low through catalytic decomposition, thereby ensuring that the ozone meets the regulations of national standards.
Further, water to be disinfected is injected into the waterway of the multi-stage aeration disinfection reaction kettle at equal pressure. And the processing effect of each stage is ensured.
Furthermore, the multi-stage aeration reaction kettles are arranged at equal intervals in the horizontal direction, and every two adjacent stages are gradually raised and have the same height difference.
The pressure in the reaction kettle is in a linear relation with the arrangement height, namely, delta P is rho g delta h.
The height difference between the water outlet of the sedimentation tank and the corresponding water inlet of the reaction kettle is the same, so that the water to be disinfected is ensured to be injected into the multi-stage aeration disinfection reaction kettle waterway under the equal pressure.
An ozone disinfection device for water comprises a first-stage sedimentation tank 1, an ozone generation stack 2, a multi-stage ozone aeration reaction kettle 4, a second-stage sedimentation tank 5 and a catalytic converter (not shown), wherein a plurality of water outlets are formed in the first-stage sedimentation tank, a plurality of water inlets are formed in the second-stage sedimentation tank, the multi-stage ozone aeration reaction kettles are arranged in the horizontal direction at equal intervals, each two adjacent stages are gradually raised and have the same height difference, a reaction kettle water inlet is formed in one end of each stage of ozone aeration reaction kettle, a reaction kettle water outlet is formed in the other end of each stage of ozone aeration reaction kettle, a plurality of ozone inlets are formed in the bottom of each stage of ozone aeration reaction kettle along the extension direction, a plurality of ozone outlets are formed in the top of each stage of ozone aeration reaction kettle, the reaction kettle water inlet and the reaction kettle water outlet are both close to the lower part of the reaction kettle, the water inlet of, ozone import of first order ozone aeration reation kettle takes place the ozone export intercommunication of piling up with ozone through ozone pipeline 3 respectively, and the ozone export of last order ozone aeration reation kettle passes through ozone pipeline intercommunication with the ozone import of next stage ozone aeration reation kettle respectively, and each ozone import department installs ozone nozzle (not shown), and the ozone nozzle fumarole diameter of next stage is less than last order ozone nozzle fumarole diameter, and the ozone export of last order ozone aeration reation kettle and catalyst converter intercommunication.
Ozone takes place to pile the preparation back through ozone, in entering into first order ozone aeration reation kettle from a plurality of ozone imports of bottom, handle the water in the first order ozone aeration reation kettle, then in the ozone export through first order ozone aeration reation kettle came out and gets into second order ozone aeration reation kettle, handle the water in the second order ozone aeration reation kettle, handle step by step so, reduce the concentration of ozone gradually, the rivers after the final processing flow in the second order sedimentation tank, last one-level ozone is handled through the catalyst converter.
Because reation kettle water inlet and reation kettle delivery port all are close to the reation kettle lower part, and a plurality of ozone imports have been seted up along the extending direction bottom to every level ozone aeration reation kettle, and a plurality of ozone exports have been seted up at the top, guarantee pending water lower half in reation kettle, and ozone gets into from the reation kettle bottom and carries out disinfection treatment to water, and remaining ozone is in flowing to next stage reation kettle from the top, accomplishes aeration treatment step by step. Guarantee that no residual ozone in aquatic, and because the water of treating in the one-level sedimentation tank is different to high concentration by low, reduce gradually, adopt multistage aeration disinfection reation kettle, the ozone concentration of bottom is big, degressive mode step by step, has improved the utilization ratio of ozone and has promoted treatment effeciency.
Furthermore, a plurality of water outlets on the primary sedimentation tank are gradually increased and are the same as the height difference of the corresponding water inlets of the reaction kettle. Guarantee that multistage water route gets into every level ozone aeration reation kettle with the same pressure in, guarantee treatment effect and treatment effeciency, make equipment operation reliable and stable, prolong the life of equipment.
Furthermore, each level of ozone pipeline inlet and outlet is provided with a water return bend 6, so that sewage is prevented from being mixed into the air path.
In conclusion, the ozone disinfection method and the ozone disinfection equipment for water, which are protected by the invention, have the advantages of low operation cost, convenient preparation, good disinfection effect, high treatment efficiency and no ozone residue in water.
Various modifications and alterations to this invention will become apparent to 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 (6)
1. The ozone disinfection method for water is characterized by comprising the following process steps:
firstly, preparing 30% high-concentration ozone gas;
secondly, introducing the high-concentration ozone gas prepared in the first step into a multi-stage aeration disinfection reaction kettle;
thirdly, injecting water to be disinfected into a water path of the multi-stage aeration disinfection reaction kettle;
step four, introducing high-concentration ozone gas into the multi-stage aeration disinfection reaction kettle step by step to disinfect water, reducing the diameter of bubbles step by step, dissolving ozone step by step and reducing the concentration of ozone;
and fifthly, passing the ozone after the last stage of aeration through a catalyst to convert the residual ozone into oxygen, wherein the concentration of the ozone is reduced to a national standard allowable value.
2. The method of claim 1, wherein the water to be disinfected is injected into the water channel of the multi-stage aeration disinfection reactor under equal pressure.
3. The method of claim 2, wherein the multi-stage aeration reaction vessels are arranged at equal intervals in the horizontal direction and are gradually raised from each adjacent two stages with the same height difference.
4. An ozone disinfection device for water is characterized by comprising a first-stage sedimentation tank, an ozone generation pile, a multi-stage ozone aeration reaction kettle, a second-stage sedimentation tank and a catalytic converter, wherein a plurality of water outlets are formed in the first-stage sedimentation tank, a plurality of water inlets are formed in the second-stage sedimentation tank, the multi-stage ozone aeration reaction kettle is arranged in the horizontal direction at equal intervals, every two adjacent stages are gradually raised and have the same height difference, a reaction kettle water inlet is formed in one end of each stage of ozone aeration reaction kettle, a reaction kettle water outlet is formed in the other end of each stage of ozone aeration reaction kettle, a plurality of ozone inlets are formed in the bottom of each stage of ozone aeration reaction kettle along the extension direction, a plurality of ozone outlets are formed in the top of each stage of ozone aeration reaction kettle, the reaction kettle water inlet and the reaction kettle water outlet are close to the lower part of the reaction kettle, the water inlet of each stage, ozone import of first order ozone aeration reation kettle takes place the ozone export intercommunication of piling up with ozone through ozone pipeline respectively, and the ozone export of last order ozone aeration reation kettle passes through ozone pipeline intercommunication with the ozone import of next order ozone aeration reation kettle respectively, and each ozone import department installs the ozone shower nozzle, and the ozone shower nozzle fumarole diameter of next order is less than last order ozone shower nozzle fumarole diameter, and the ozone export of last order ozone aeration reation kettle and catalyst converter intercommunication.
5. The apparatus of claim 4, wherein the outlets of the first-stage sedimentation tank are elevated in steps and have the same height difference with the inlets of the corresponding reaction vessels.
6. The apparatus of claim 4, wherein each ozone pipe inlet and outlet is provided with a reverse trap.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010481937.0A CN111704232B (en) | 2020-05-28 | 2020-05-28 | Ozone disinfection method and equipment for water |
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| CN202010481937.0A CN111704232B (en) | 2020-05-28 | 2020-05-28 | Ozone disinfection method and equipment for water |
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| CN111704232B CN111704232B (en) | 2023-09-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0549413A1 (en) * | 1991-12-20 | 1993-06-30 | Trailigaz" - Compagnie Generale De L'ozone | Water treatment process for eliminating viruses and pesticides |
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| CN103145229A (en) * | 2013-03-12 | 2013-06-12 | 北京科技大学 | Ozone contact optimal dosing method in drinking water treatment and device thereof |
| CN106315823A (en) * | 2016-10-27 | 2017-01-11 | 武汉工程大学 | Ozone aeration reaction equipment and wastewater treatment method thereof |
| CN206486337U (en) * | 2017-02-20 | 2017-09-12 | 湖南永清水务有限公司 | It is a kind of to reduce the processing system of livestock breeding wastewater bio-chemical effluent colourity |
| CN208883561U (en) * | 2018-09-21 | 2019-05-21 | 四川恒泰环境技术有限责任公司 | A kind of multistage cross flow ozone reactor |
| CN110330094A (en) * | 2019-07-17 | 2019-10-15 | 新疆工程学院 | The method of the oxidative degradation industrial organic waste water of ozone utilization rate is improved using tandem reaction device |
| CN110615521A (en) * | 2019-08-19 | 2019-12-27 | 广东卓信环境科技股份有限公司 | Ozone catalytic oxidation tank for treating wastewater |
-
2020
- 2020-05-28 CN CN202010481937.0A patent/CN111704232B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0549413A1 (en) * | 1991-12-20 | 1993-06-30 | Trailigaz" - Compagnie Generale De L'ozone | Water treatment process for eliminating viruses and pesticides |
| JP2001334277A (en) * | 2000-05-29 | 2001-12-04 | Sasakura Engineering Co Ltd | Ozone reaction apparatus for wastewater |
| CN102897937A (en) * | 2011-07-27 | 2013-01-30 | 广东粤海控股有限公司 | Ozone-adding two-step jet mixing method multistage reactor |
| CN102491563A (en) * | 2011-12-22 | 2012-06-13 | 哈尔滨工业大学 | Three-stage catalysis ozone oxidation water purifying device |
| CN102583850A (en) * | 2012-03-08 | 2012-07-18 | 清华大学 | Ultraviolet joint ozone system for realizing micro-polluted water treatment |
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| CN206486337U (en) * | 2017-02-20 | 2017-09-12 | 湖南永清水务有限公司 | It is a kind of to reduce the processing system of livestock breeding wastewater bio-chemical effluent colourity |
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| CN110330094A (en) * | 2019-07-17 | 2019-10-15 | 新疆工程学院 | The method of the oxidative degradation industrial organic waste water of ozone utilization rate is improved using tandem reaction device |
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