CN110921810A - Equipment for utilizing ozone tail gas in water treatment and method for treating water by utilizing equipment - Google Patents
Equipment for utilizing ozone tail gas in water treatment and method for treating water by utilizing equipment Download PDFInfo
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- CN110921810A CN110921810A CN201911105924.7A CN201911105924A CN110921810A CN 110921810 A CN110921810 A CN 110921810A CN 201911105924 A CN201911105924 A CN 201911105924A CN 110921810 A CN110921810 A CN 110921810A
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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
- B01D53/007—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 by irradiation
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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
- B01D53/46—Removing components of defined structure
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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
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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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/14—Ozone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/10—Single element gases other than halogens
- B01D2257/104—Oxygen
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
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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
- C02F2201/78—Details relating to ozone treatment devices
- C02F2201/782—Ozone generators
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Abstract
The invention discloses equipment for utilizing ozone tail gas in water treatment, which comprises an ozone generating device, an ozone contact oxidation reaction device, a first aeration device, a first exhaust valve, an ultraviolet/ozone composite reaction device, an ultraviolet lamp, a quartz sleeve, a sealing device, a second aeration device and a second exhaust valve. The invention also provides a method for utilizing the ozone tail gas by utilizing the equipment. The invention realizes the utilization of the ozone tail gas through ingenious process design and construction of the treatment device, strengthens the water treatment effect, and is efficient and environment-friendly.
Description
Technical Field
The invention belongs to the field of water treatment equipment, and particularly relates to equipment for utilizing ozone tail gas in water treatment, and a method for treating water by utilizing the equipment.
Background
The water pollution control is important for guaranteeing human health and water environment ecological safety. Effective treatment of source water or sewage/wastewater discharged after use is one of the important means for water pollution control. Among the numerous water treatment technologies, ozone oxidation is favored because of its high treatment efficiency and good handleability. Ozone has strong oxidizing ability and can directly and selectively react with organic matters. Meanwhile, ozone is decomposed in water, especially in alkaline water, to generate hydroxyl radicals, thereby initiating a nearly unselective and rapid oxidation reaction. In addition, the ozone can kill viruses and bacteria quickly and efficiently, and can achieve the effect of sterilization and disinfection in a short time. Ozone microbial inactivation is a water disinfection process that is widely used worldwide. However, the ozone water treatment process has some disadvantages, such as incomplete oxidation of ozone, high cost of ozone generation, possible generation of harmful by-products in high dose use, and low ozone utilization rate in the ozone water treatment process, and a large amount of ozone component escapes with tail gas, and needs to be absorbed or damaged in order to prevent secondary pollution to the atmosphere. Particularly, when the water body contains volatile organic pollutants, the organic pollutants can escape along with tail gas to pollute the atmosphere when an ozone-containing gas aeration process is adopted. How to effectively utilize the ozone tail gas in the water treatment is one of the key problems to be solved for further optimization and popularization of the process.
Combined application of ultraviolet radiation and ozone (UV/O)3) Can overcome the defects of single process water treatment, and has synergistic effect by coupling the two under certain conditions. In a liquid phase system or a gas phase system containing a certain humidity, ozone can be decomposed under ultraviolet radiation to generate secondary oxides to enhance the treatment effect. In addition, ultraviolet radiation and ozone are efficient water body disinfection technologies, and the ultraviolet radiation and the ozone are coupled to have good application prospects in the field of water body disinfection. Although many studies have been reported on the process, the improvement of the water treatment efficiency is mainly focused. How to solve the problem of ozone tail gas pollution by using the principle of ultraviolet/ozone coupling effect through ingenious technological process optimization and reaction device design is worthy of exploration.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide efficient, economical, safe and environment-friendly equipment for utilizing ozone tail gas in water treatment and a method for treating water by utilizing the equipment.
The technical scheme is as follows: in order to achieve the purpose, the invention adopts the following technical scheme:
the equipment for utilizing ozone tail gas in water treatment comprises an ozone generating device, an ozone contact oxidation reaction device, a first aeration device, a first exhaust valve, an ultraviolet/ozone composite reaction device, an ultraviolet lamp, a quartz sleeve, a sealing device, a second aeration device and a second exhaust valve, wherein the first aeration device is arranged at the bottom in the ozone contact oxidation reaction device; the water outlet end of the ozone contact oxidation reaction device is connected with the water inlet end of the ultraviolet/ozone composite reaction device; the ultraviolet lamp is arranged in the ultraviolet/ozone composite reaction device and penetrates through the inner space of the ultraviolet/ozone composite reaction device, a quartz sleeve (waterproof and light-transmitting) is sleeved on the periphery of the ultraviolet lamp, the ultraviolet lamp and the quartz sleeve are hermetically connected through upper end and lower end sealing devices, the upper end sealing device is provided with an air inlet and communicated with a first exhaust valve, and the lower end sealing device is provided with an air outlet and communicated with a second aeration device; the second aeration device is positioned at the bottom of the ultraviolet/ozone composite reaction device, and the second exhaust valve is positioned at the top of the ultraviolet/ozone composite reaction device.
Preferably, the ultraviolet lamp is a common ultraviolet lamp or an ozone-generating ultraviolet lamp, and preferably an ozone-generating ultraviolet lamp.
Preferably, the sealing device is made of oxidation-resistant materials and has the functions of sealing two ends of the quartz tube and fixing the ultraviolet lamp.
The improved ultraviolet lamp also comprises a ballast and a power supply, wherein the power supply is connected with the ultraviolet lamp through the ballast and supplies power to the ultraviolet lamp.
As an improvement, the device also comprises an ozone gas phase concentration monitor and a gas flowmeter, wherein the ozone gas phase concentration monitor and the gas flowmeter are sequentially connected behind the gas outlet of the sealing device and in front of the second aeration device.
As an improvement, the device also comprises a water inlet pump, a water body pretreatment device and a water body secondary treatment device, wherein a water outlet of the water inlet pump is connected with a water inlet of the water body pretreatment device, and a water outlet of the water body pretreatment device is connected with a water inlet of the ozone contact oxidation reaction device; the water body pretreatment device can be used for treating one or more of precipitation, filtration, coagulation and flocculation in series; the water body secondary treatment device is arranged between the ozone contact oxidation reaction device and the ultraviolet/ozone composite reaction device, a water inlet of the water body secondary treatment device is connected with a water outlet of the ozone contact oxidation reaction device, and a water outlet of the water body secondary treatment device is connected with a water inlet of the ultraviolet/ozone composite reaction device; the treatment process of the water body secondary treatment device can be one or a series combination of biochemical treatment, deep oxidation treatment, precipitation, clarification and the like.
The method for treating water by utilizing the equipment for utilizing the ozone tail gas in the water treatment comprises the following steps:
(a) the ozone generating device generates gas containing ozone by using oxygen or air as a gas source, and the gas is introduced into the ozone contact oxidation reaction device through the first aeration device to carry out ozone oxidation treatment on the water body; discharging unreacted tail gas containing ozone escaped from the ozone contact oxidation reaction device out of the ozone contact oxidation reaction device through a first exhaust valve;
(b) leading the ozone-containing tail gas discharged from the ozone contact oxidation reaction device into an interlayer between an ultraviolet lamp and a quartz sleeve through a sealing device, degrading and removing organic pollutants possibly carried in the ozone-containing tail gas in the interval under the composite action of ultraviolet/gas-phase ozone, and generating new ozone gas by oxygen in the ozone-containing tail gas under the action of ultraviolet radiation;
(c) and residual tail gas flowing out of the interlayer between the ultraviolet lamp and the quartz sleeve is introduced into the ultraviolet/ozone composite reaction device through a second aeration device, an ultraviolet/liquid phase ozone composite action is formed in the ultraviolet/ozone composite reaction device, pollutants in the water body are degraded and removed, bacteria, viruses and the like are inactivated, and the water body flowing out of the ultraviolet/ozone composite reaction device is purified water.
Has the advantages that: compared with the prior art, the invention has the following beneficial effects:
the tail gas after the ozone oxidation treatment is fully utilized, the traditional ozone tail gas treatment cost is reduced, the air pollution possibly caused by tail gas emission is prevented, and the water treatment efficiency is improved.
Secondly, in the process of water treatment by ozone oxidation, some volatile organic pollutants may escape from the water body along with ozone tail gas, and the volatile organic pollutants are discharged into the atmosphere to cause atmospheric pollution. In the traditional ozone tail gas utilization process, volatile organic pollutants carried by the tail gas can reenter a water body to cause water body pollution. In the invention, the pollutants of the components are effectively removed.
When the oxygen gas source is used for preparing ozone, the tail gas discharged in the ozone oxidation treatment process is mainly oxygen, and the part of oxygen is utilized to generate new ozone under ultraviolet radiation for water treatment, so that the utilization rate of waste gas is improved.
And fourthly, the tail gas flows through the interlayer between the ultraviolet lamp and the quartz sleeve, so that pollutants are degraded, residual oxygen is utilized, the airflow also has the effect of dissipating heat generated in the working process of the ultraviolet lamp tube, and the stable and efficient work of the ultraviolet lamp is guaranteed.
Drawings
FIG. 1 is a schematic view showing the structure of an apparatus for utilizing ozone off-gas in water treatment in example 1.
FIG. 2 is a schematic view showing the structure of an apparatus for utilizing ozone off-gas in water treatment in example 2.
Detailed Description
The invention will be better understood from the following examples.
Example 1
The equipment for utilizing ozone tail gas in water treatment is shown in figure 1 and comprises an ozone generating device 1, an ozone contact oxidation reaction device 2, a first aeration device 3, a first exhaust valve 4, an ultraviolet/ozone composite reaction device 5, an ultraviolet lamp 6, a quartz sleeve 7, a sealing device 8, a second aeration device 9, a second exhaust valve 10, a ballast 11, a power supply 12 and a water inlet pump 15. The air outlet end of the ozone generating device 1 is connected with the first aeration device 3; the first aeration device 3 is arranged at the bottom in the ozone oxidation reaction device 2; the first exhaust valve 4 is arranged at the top of the ozone oxidation reaction device 2; the water outlet end of the ozone oxidation reaction device 2 is connected with the water inlet end of the ultraviolet/ozone composite reaction device 5; the ultraviolet lamp 6 is arranged in the ultraviolet/ozone composite reaction device 5 and penetrates through the inner space of the ultraviolet/ozone composite reaction device, a quartz sleeve 7 is arranged outside the ultraviolet lamp to be waterproof and transparent, the ultraviolet lamp and the ozone composite reaction device are hermetically connected through a sealing device 8 at the upper end and a sealing device 8 at the lower end, the sealing device 8 at the upper end is provided with an air inlet and communicated with the first exhaust valve 4, and the sealing device 8 at the lower end is provided with an air outlet and communicated with; the second aeration device 9 is positioned at the bottom of the ultraviolet/ozone composite reaction device 5; the second exhaust valve 10 is positioned at the top of the ultraviolet/ozone composite reaction device 5; the power supply 12 is connected with the ultraviolet lamp 6 through the ballast 11 and supplies electricity to the ultraviolet lamp 6; the water outlet of the water inlet pump 15 is connected with the water inlet of the ozone contact oxidation reaction device 2, and the raw water to be treated is conveyed to the ozone contact oxidation reaction device 2.
In the embodiment of the invention, the air inlet source of the ozone generating device 1 is oxygen, the first aeration device 3 and the second aeration device 9 are both microporous aeration heads, and the ultraviolet lamp 6 is an ozone-generating ultraviolet lamp.
The specific working principle is as follows:
the ozone generating device 1 generates gas containing ozone by using oxygen, and the gas is introduced into the ozone contact oxidation reaction device 2 through the first aeration device 3 to carry out ozone oxidation treatment on the water body; the residual ozone-containing tail gas escaping from the ozone contact oxidation reaction device 2 is discharged out of the ozone contact oxidation reaction device 2 through a first exhaust valve 4, and is introduced into an interlayer between an ultraviolet lamp 6 and a quartz sleeve 7 through a sealing device 8, organic pollutants possibly carried in the ozone-containing tail gas in the interval are degraded and removed under the composite action of ultraviolet/gas-phase ozone, and oxygen in the ozone-containing tail gas generates new ozone gas under the action of ultraviolet radiation. And then, tail gas flows out of the interlayer region between the ultraviolet lamp 6 and the quartz sleeve 7, is introduced into the ultraviolet/ozone composite reaction device 5 through the second aeration device 9, forms an ultraviolet/liquid phase ozone composite action in the ultraviolet/ozone composite reaction device 5, degrades and removes pollutants in the water body, and inactivates bacteria, viruses and the like. The water flowing out of the ultraviolet/ozone composite reaction device 5 is purified water.
Example 2
The equipment for utilizing ozone tail gas in water treatment, shown in figure 2, is basically the same as that in the embodiment 1, and the difference is only that: the device also comprises an ozone gas phase concentration monitor 13, a gas flowmeter 14, a water body pretreatment device 16 and a water body secondary treatment device 17. The ozone gas phase concentration monitor 13 and the gas flowmeter 14 are connected in sequence after the air outlet of the sealing device 8 and before the second aeration device 9. The water outlet of the water body pretreatment device 16 is connected with the water outlet of the water inlet pump 15, and the water outlet of the water body pretreatment device 16 is connected with the water inlet of the ozone contact oxidation reaction device 2; the water body pretreatment device 16 adopts a sand filtration process as a treatment process; the water body secondary treatment device 17 is arranged between the ozone contact oxidation reaction device 2 and the ultraviolet/ozone composite reaction device 5, the water inlet of the water body secondary treatment device is connected with the water outlet of the ozone contact oxidation reaction device 2, and the water outlet of the water body secondary treatment device is connected with the water inlet of the ultraviolet/ozone composite reaction device 5; the treatment process of the water body secondary treatment device 17 is a biological activated carbon process.
Treating water on certain surface, and detecting the sterilization rate of the effluent, wherein the total number of bacteria in the raw water is about 2 multiplied by 104CFU/mL. The treatment parameters and effects are shown in table 1.
TABLE 1 Water treatment Effect of ozone tail gas utilization equipment in Water treatment
| Batch number | Device | Ultraviolet power (W) | Gas-phase ozone adding concentration (mg/L) | Sterilization (%) |
| 1 | Apparatus of example 1 | 20 | 12.2 | 99.0 |
| 2 | Apparatus of example 2 | 20 | 26.7 | 99.9 |
Claims (7)
1. The equipment for utilizing ozone tail gas in water treatment is characterized by comprising an ozone generating device (1), an ozone contact oxidation reaction device (2), a first aeration device (3), a first exhaust valve (4), an ultraviolet/ozone composite reaction device (5), an ultraviolet lamp (6), a quartz sleeve (7), a sealing device (8), a second aeration device (9) and a second exhaust valve (10), wherein the first aeration device (3) is arranged at the inner bottom of the ozone contact oxidation reaction device (2), the first exhaust valve (4) is arranged at the top of the ozone contact oxidation reaction device (2), and the air outlet end of the ozone generating device (1) is connected with the first aeration device (3); the water outlet end of the ozone contact oxidation reaction device (2) is connected with the water inlet end of the ultraviolet/ozone composite reaction device (5); the ultraviolet lamp (6) is arranged in the ultraviolet/ozone composite reaction device (5) and penetrates through the inner space of the ultraviolet lamp (6), a quartz sleeve (7) is sleeved on the periphery of the ultraviolet lamp (6), the ultraviolet lamp and the quartz sleeve are hermetically connected through a sealing device (8) at the upper end and a sealing device (8) at the lower end, the sealing device (8) at the upper end is provided with an air inlet which is communicated with the first exhaust valve (4), and the sealing device (8) at the lower end is provided with an air outlet which is communicated with the second aeration; the second aeration device (9) is positioned at the bottom of the ultraviolet/ozone composite reaction device (5), and the second exhaust valve (10) is positioned at the top of the ultraviolet/ozone composite reaction device (5).
2. The apparatus for the treatment of brine with electro-filtered and catalyzed persulfate according to claim 1, wherein the ultraviolet lamp (6) is a normal ultraviolet lamp or an ozone-generating ultraviolet lamp, preferably an ozone-generating ultraviolet lamp.
3. An apparatus for the treatment of brine with electro-filtered catalytic persulfate according to claim 1, characterized in that said sealing means (8) is made of oxidation-resistant material.
4. An electro-filtration catalytic persulfate water treatment plant according to claim 1, further comprising a ballast (11) and a power supply (12), said power supply (12) being connected to the ultraviolet lamp (6) via the ballast (11) for powering the ultraviolet lamp (6).
5. An electro-filtration catalytic persulfate water treatment plant according to claim 1, further comprising an ozone gas phase concentration monitor (13) and a gas flow meter (14), wherein the ozone gas phase concentration monitor (13) and the gas flow meter (14) are connected in sequence after the gas outlet of the sealing device (8) and before the second aeration device (9).
6. The electro-filtration catalysis persulfate water treatment equipment according to claim 1, further comprising a water inlet pump (15), a water body pretreatment device (16) and a water body secondary treatment device (17), wherein the water outlet of the water inlet pump (15) is connected with the water inlet of the water body pretreatment device (16), and the water outlet of the water body pretreatment device (16) is connected with the water inlet of the ozone contact oxidation reaction device (2); the water body secondary treatment device (17) is arranged between the ozone contact oxidation reaction device (2) and the ultraviolet/ozone composite reaction device (5), the water inlet of the water body secondary treatment device is connected with the water outlet of the ozone contact oxidation reaction device (2), and the water outlet of the water body secondary treatment device is connected with the water inlet of the ultraviolet/ozone composite reaction device (5).
7. The method for water treatment using the apparatus for water treatment using ozone off-gas according to any one of claims 1 to 6, comprising the steps of:
(a) the ozone generating device (1) generates gas containing ozone by using oxygen or air as a gas source, and the gas is introduced into the ozone contact oxidation reaction device (2) through the first aeration device (3) to carry out ozone oxidation treatment on the water body; unreacted tail gas containing ozone escaping from the ozone contact oxidation reaction device (2) is discharged out of the ozone contact oxidation reaction device (2) through a first exhaust valve (4);
(b) the ozone-containing tail gas discharged from the ozone contact oxidation reaction device (2) is introduced into an interlayer between an ultraviolet lamp (6) and a quartz sleeve (7) through a sealing device (8), organic pollutants possibly carried in the ozone-containing tail gas in the interval are degraded and removed under the composite action of ultraviolet/gas-phase ozone, and oxygen in the ozone-containing tail gas generates new ozone gas under the action of ultraviolet radiation;
(c) residual tail gas flowing out of an interlayer between the ultraviolet lamp (6) and the quartz sleeve (7) is introduced into the ultraviolet/ozone composite reaction device (5) through the second aeration device (9), an ultraviolet/liquid phase ozone composite effect is formed in the ultraviolet/ozone composite reaction device (5), pollutants in water are degraded and removed, bacteria and viruses are inactivated, and the water flowing out of the ultraviolet/ozone composite reaction device (5) is purified water.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54125860A (en) * | 1978-03-10 | 1979-09-29 | Kubota Ltd | Treating method of waste water that contain high cod and chromaticity |
| CN101108762A (en) * | 2006-07-19 | 2008-01-23 | 深圳市海川实业股份有限公司 | Process technique for pharmacy wastewater |
| CN102863110A (en) * | 2012-10-23 | 2013-01-09 | 河海大学 | Device and method for integrally treating refractory organic wastewater |
| CN106830447A (en) * | 2017-04-20 | 2017-06-13 | 佛山市佳利达环保科技股份有限公司 | A kind of method that ozone tail gas are recycled |
| CN207628195U (en) * | 2017-11-10 | 2018-07-20 | 四川研宝科技有限公司 | A kind of ozone purification device for after ultraviolet light photodissociation exhaust gas |
-
2019
- 2019-11-13 CN CN201911105924.7A patent/CN110921810B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54125860A (en) * | 1978-03-10 | 1979-09-29 | Kubota Ltd | Treating method of waste water that contain high cod and chromaticity |
| CN101108762A (en) * | 2006-07-19 | 2008-01-23 | 深圳市海川实业股份有限公司 | Process technique for pharmacy wastewater |
| CN102863110A (en) * | 2012-10-23 | 2013-01-09 | 河海大学 | Device and method for integrally treating refractory organic wastewater |
| CN106830447A (en) * | 2017-04-20 | 2017-06-13 | 佛山市佳利达环保科技股份有限公司 | A kind of method that ozone tail gas are recycled |
| CN207628195U (en) * | 2017-11-10 | 2018-07-20 | 四川研宝科技有限公司 | A kind of ozone purification device for after ultraviolet light photodissociation exhaust gas |
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