Ultraviolet strong oxygen depth water treatment method and device

[0041] Example 1

[0042] Use coking wastewater figure 2 When the shown ultraviolet strong oxygen reaction device is processed, first connect the pressure equipment (such as pressure tank, transfer pump, etc.) to the water inlet 1, and transport the coking wastewater to be treated into the filter to filter the membrane 2, for example, ultrafiltration Membrane, the ultrafiltration method is used to filter and remove the suspended particles with a diameter of more than 2nm in the coking wastewater. After ultrafiltration, the purified water is output through the filter outlet 4. At the same time, the primary oxidation state active agent is used by pressure equipment (such as pressure tanks, transfer pumps, etc.) ) The purified water is transported into the filter and ultrafiltration, and enters the ultraviolet strong oxygen reactor through the filter outlet 4 at the same time, and the filter is connected to the ultraviolet strong oxygen reactor by the filter outlet 4; in this embodiment, it is added to the filtered sewage 0.05mmol/L Na 2 SO 4 As the primary oxidation state active agent; after the ultrafiltration, the purified water and the primary oxidation state active agent reach the ultraviolet strong oxygen reactor, start the electromagnetic source 6 to start the magnetic field excitation, and control the field strength to 480mT to stimulate the primary oxidation state active agent, Inducing organic pollutants in the water in the microporous Al 2 O 3 The electrophilic medium 7 realizes the limited electrophilic addition of organic pollutants to generate triplet free radicals of the pollutants. At this time, the preliminary treatment is completed; at this time, the intermediate oxidation state active agent is passed through the dosing port 8 with a pressure device (such as Pressure tank, transfer pump, etc.) are transported into the ultraviolet strong oxygen reactor, the intermediate oxidation state active agent and the triplet free radicals of the pollutants simultaneously penetrate the microporous electrophilic medium 7 and enter the internal ultraviolet irradiation zone; microporous Al 2 O 3 The electrophilic medium can also act as a microfiltration membrane to achieve high-efficiency filtration and remove the polymer flocs generated during the electrophilic addition process of coking wastewater; in this example, 0.05mmol/L HClO was added to the filtered coking wastewater as the intermediate oxidation state Active agent; in the internal ultraviolet radiation zone, the ultraviolet radiation source 9 is used to stimulate the nanocrystalline spike catalyst, and a 250W mercury lamp is used as the ultraviolet radiation source to induce Cu 2 O nanocrystalline spike catalyst surface produces strong oxidation state active sites (SOAS) and highly active oxygen clusters (HROC), which can realize the multi-point attack of active triplet free radicals of organic pollutants in coking wastewater, and finally realize coking wastewater The decomposition and mineralization of organic pollutants completes the thorough purification of pollutants, and finally the effluent is discharged from the system through the purified water outlet 11.

[0043] Using traditional ozone oxidation technology, ozone catalytic oxidation, Fenton oxidation, electrocatalysis, photocatalysis, and ultraviolet strong oxygen advanced water treatment methods, the coking wastewater is deeply treated. The raw water and effluent quality of the coking wastewater are shown in the table below.

[0044]

[0045]

[0046] It can be obtained from the table to characterize the COD of the water quality index of coking wastewater Cr , NH 3 -N, oil content, and SS content are all significantly decreased, and the conductivity of the coking wastewater effluent is also decreased compared to the raw water. In addition, such as image 3 The curve of COD concentration with time in the process of treating coking wastewater by the UV strong oxygen deep water treatment method and other treatment technologies shows that the COD concentration in the coking wastewater decreases rapidly with time after being treated by the method of the present invention, and after 30 minutes The concentration tends to stabilize, and the COD concentration declines more rapidly than other treatment technologies. It shows that after the method of the present invention is processed, the pollutants in the coking wastewater, especially the organic pollutants, can be effectively decomposed and mineralized and removed, and the COD removal efficiency is more efficient. In addition, it can be seen from the above table that the removal rate of organic pollutants in coking wastewater by ozone oxidation and photocatalysis is low, and the effluent COD Cr The concentration is higher than 100mg/L. Although ozone catalytic oxidation and Fenton oxidation are relatively good, they are still higher than 50mg/L, which cannot meet the water quality discharge standard of "Class A". In contrast, electrocatalysis and ultraviolet strong oxygen effluent water Both can achieve high pollutant removal efficiency, effluent COD Cr Concentration is less than 50mg/L; ultraviolet strong oxygen is not only COD Cr The removal efficiency is high, the removal efficiency of ammonia nitrogen is better (0.7mg/L), and the concentration of ammonia nitrogen in the electrocatalytic effluent is still high (3.3mg/L). The electrical conductivity in the table is one of the indicators that characterize the ionic strength of sewage and wastewater. The main factors that cause changes in the ionic strength of water may include mineralization of organic matter (increased conductivity), softening of hardness ions (decrease in conductivity), and chloride ion Oxidation (decrease in conductivity). It can be seen from the table that a large amount of chloride ions in the coking wastewater are efficiently oxidized and discharged by ultraviolet strong oxygen, resulting in a slight decrease in electrical conductivity compared with raw water.

[0047] By comparing the effluent of different treatment methods, the effluent treated by the method of the present invention is better than the effluent of ozone oxidation, ozone catalytic oxidation, Fenton oxidation, and the existing electrocatalysis and photocatalysis. Cr , NH 3 -N, oil content and other aspects have better comprehensive indicators.

[0048] Example 2

[0049] The difference between Example 2 and Example 1 is that the treatment object is high-salt wastewater, and the primary oxidation state active agent selected is 0.10mmol/L K 2 SO 4 , The microporous electrophilic medium is Fe 2 O 3 , The intermediate oxidation state active agent is 0.08mmol/L CH 3 COOOH, the chemical composition of the nanocrystalline spike catalyst is Bi 2 O 3 , The other processing procedures are the same as the embodiment 1. The treatment effects of traditional ozone oxidation technology and ultraviolet strong oxygen technology are shown in the following table:

[0050] High salt wastewater

[0051] It can be obtained from the table to characterize the COD of the water quality index of high-salt wastewater Cr , NH 3 The content of -N, oil content, and SS are all significantly decreased, and the conductivity of the effluent of high-salt wastewater also decreases relative to the raw water. In addition, such as Figure 4 The shown ultraviolet strong oxygen deep water treatment method and traditional ozone oxidation technology in the process of treating high-salt wastewater COD and NH 3 -N concentration change curve with time, we can know the COD and NH in the coking wastewater 3 -N decreases rapidly over time after being treated by the method of the present invention, especially within 0-20 minutes, and the concentration stabilizes after 40 minutes, and COD and NH 3 -N concentration drops more rapidly than traditional ozone oxidation technology. It shows that after the method of the present invention is processed, the pollutants in the high-salt wastewater, especially the organic pollutants, can be effectively decomposed and mineralized and removed, and it has more efficient COD and NH 3 -N removal efficiency. In addition, the comparison between the effluent treated by the method of the present invention and the effluent treated by ozone oxidation shows that the treatment method of the present invention is effective in COD Cr , NH 3 -N, oil content, SS and other aspects have better treatment effects.

[0052] Example 3

[0053] The difference between Example 3 and Example 1 is that the treatment object is polymer-containing wastewater, and the primary oxidation state active agent selected is 0.07mmol/L H 2 SO 4 , The microporous electrophilic medium is NiO, the intermediate oxidation state active agent is 0.22mmol/L H 2 O 2 , The chemical composition of the nanocrystalline spike catalyst is In 2 O 3 , The electromagnetic field excitation source is a 12V alternating electric field; the ultraviolet radiation excitation source is a 20W UV-C ultraviolet lamp. The other processing procedures are the same as in Example 1. The treatment effects of traditional Fenton oxidation technology and ultraviolet strong oxygen technology are shown in the table below:

[0054] Polymer containing wastewater

[0055] It can be obtained from the table to characterize the COD of the water quality index of wastewater containing polymer C The obvious decrease indicates that after the method of the present invention is processed, the pollutants in the polymer-containing wastewater, especially the organic pollutants, are effectively decomposed and removed. In addition, such as Figure 5 The UV strong oxygen deep water treatment method and the Fenton oxidation technology shown in the process of COD and NH in the treatment of polymer-containing wastewater 3 -N concentration change curve with time, we can know the COD and NH in polymer-containing wastewater 3 -N decreases rapidly with time after being treated by the method of the present invention, and degrades completely after 90 minutes, and COD and NH 3 -N concentration Fenton oxidation technology decreases more rapidly. It shows that after the method of the present invention is processed, the pollutants in the polymer-containing wastewater, especially the organic pollutants, can be effectively decomposed and mineralized and removed, and it has more efficient COD and NH 3 -N removal efficiency. In addition, the comparison between the effluent treated by the method of the present invention and the effluent treated by Fenton oxidation shows that the treatment method of the present invention is effective in COD Cr And NH 3 -N has better processing effect. Because the organic pollutants in the polymer-containing wastewater are mineralized into salt substances in a large amount, the conductivity is increased relative to the raw water.