Device and method for oxidizing organic substances in wastewater through ultraviolet catalysis of ozone

A technology of ozone oxidation and ultraviolet light, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve the problem that the uniform irradiation of ultraviolet light is not well considered, and the wavelength of ultraviolet light is not considered more. The effect is not obvious, etc., to achieve the effect of increasing the contact ratio, improving the utilization rate, and lowering the operating cost

Inactive Publication Date: 2019-08-09
SHANGHAI LYMAX ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ultraviolet photocatalytic ozonation technology uses the catalysis of ultraviolet light and ozone to quickly and efficiently convert ozone into hydroxyl radicals with stronger oxidation ability. This technology has been used in many waste gas treatments, such as Chinese patent 201510191175.X, 201510191674.9, 201610044700.X, 201720466335.1, 201721338682.2, 201821224418.0, but in wastewater treatment, ultraviolet photocatalytic ozonation technology is relatively rare, because it needs to dissolve ozone into water first, and then produce hydroxyl radicals under ultraviolet light irradiation, in order to Organic matter in water reacts, if poorly designed, its effect is not obvious
Although Chinese patent 201520434096.2 provides an ozone ultraviolet light hydrogen peroxide composite reaction device, the mixed aeration method of ozone and water has poor effect, and the uniform irradiation of ultraviolet light is not well considered. For ultraviolet light There is no more consideration of the wavelength, only the wavelength of the UV lamp in the vacuum section can convert the oxygen in the air back to ozone and hydroxyl radicals

Method used

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  • Device and method for oxidizing organic substances in wastewater through ultraviolet catalysis of ozone
  • Device and method for oxidizing organic substances in wastewater through ultraviolet catalysis of ozone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] like figure 1 As shown, a device for ultraviolet photocatalytic ozonation of organic matter in wastewater, including a liquid inlet pump 1, a Venturi jet 2, a rotameter 3, an ozone machine 4, a reaction tank 5, an atomizing nozzle 6 and an ultraviolet lamp assembly 7 . The inlet of the liquid inlet pump 1 is connected with the outlet of the reaction tank 5, the outlet of the liquid inlet pump 1 is connected with the first inlet of the Venturi ejector 2, and the second inlet of the Venturi ejector 2 is connected with the outlet of the ozone machine 4 The outlet of the Venturi jet 2 is connected with the rotameter 3 , the rotameter 3 is connected with the atomizing nozzle 6 , and the atomizing nozzle 6 and the ultraviolet lamp assembly 7 are both arranged in the reaction tank 5 .

[0035] The inlet pump 1 includes an inlet valve 8 and an outlet valve 9 , the inlet valve 8 is arranged between the inlet pump 1 and the reaction tank 5 , and the outlet valve 9 is arranged be...

Embodiment 2

[0043] A comparative experiment with or without a UV reflector in the UV catalytic reaction area:

[0044] Place an ultraviolet lamp tube with a diameter of 3 cm and a length of 20 cm in the center of an ultraviolet catalytic reaction cylinder with a diameter of 20 cm and a length of 50 cm, and set the ultraviolet wavelength of the ultraviolet lamp between 100 and 200 nm; The instrument is placed in the middle of the ultraviolet lamp tube and the reaction cylinder, and the distribution of the ultraviolet intensity under the UV reflector and without the reflector is compared (0 degrees means that the intensity meter of the ultraviolet 254nm wavelength is facing the ultraviolet lamp, and it is done every 90 degrees. Measurement, when 180 degrees, the ultraviolet light intensity meter is facing away from the lamp tube), and its data are shown in Table 1:

[0045] Table 1 UV intensity with and without UV reflector

[0046] UV intensity (uW / cm 2 )

[0047] It can be se...

Embodiment 3

[0049] Test the 0.015% methylene blue solution by using the ozone oxidation device in Example 1, compare ozone under the same conditions, ozone+ultraviolet, ozone+ultraviolet+the removal rate of organic matter under the ultraviolet reflector, its data are shown in Table 2 :

[0050] Table 2: Removal rates of methylene blue under the conditions of ozone, ozone+UV, ozone+UV+UV reflector in different reaction times

[0051]

[0052] As can be seen from Table 2, under the situation of ozone+ultraviolet lamp+ultraviolet reflector, the removal rate of methylene blue is the highest. It can be seen that the present invention can effectively improve the efficiency of ultraviolet photocatalytic ozonation, greatly reduce the reaction time, improve the efficiency, and reduce the cost.

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Abstract

The invention discloses a device and method for oxidizing organic substances in wastewater through ultraviolet catalysis of ozone, and relates to the field of wastewater treatment. The device comprises a liquid inlet pump, a Venturi jet, an ozone machine, a reaction tank, an atomizing nozzle and an ultraviolet lamp assembly; an inlet of the liquid inlet pump is communicated with an outlet of the reaction tank, an outlet of the liquid inlet pump is communicated with a first inlet of the Venturi jet, a second inlet of the Venturi jet is communicated with an outlet of the ozone machine, an outletof the Venturi jet is communicated with the atomizing nozzle, and the atomizing nozzle and the ultraviolet lamp assembly are both arranged in the reaction tank. The device and method for oxidizing the organic substances in the wastewater through the ultraviolet catalysis of the ozone have the advantages that the contact area between ozone and the organic substances in the wastewater is enlarged,and the oxidizing ability of the ultraviolet catalyzed ozone to generate hydroxyl radicals is improved, thereby maximally oxidizing and degrading the organic substances in the wastewater.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a device and method for ultraviolet photocatalytic ozonation of organic matter in waste water. Background technique [0002] With the rapid development of modern industry, various refractory organic wastewaters are increasing. These wastewaters generally have the characteristics of high pollutant concentration, high toxicity and poor biodegradability, which seriously pollute the water environment and endanger human health. After traditional physicochemical and biochemical treatment, the wastewater still contains a large amount of toxic and biodegradable organic pollutants, which cannot meet the discharge standards and require further advanced treatment to meet the discharge standards. Therefore, the development of industrial wastewater deep waste treatment technology is of great significance to water saving, emission reduction and environmental protection. [0003] For this ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/32C02F1/78C02F1/72C02F101/30
CPCC02F1/32C02F1/725C02F1/78C02F2101/30C02F2201/782C02F2209/40C02F2209/44C02F2305/023
Inventor 傅立德方树鹏
Owner SHANGHAI LYMAX ENVIRONMENTAL TECH CO LTD
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