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Multi-dimensional advanced oxidation organic wastewater advanced treatment method and system

An advanced oxidation and advanced treatment technology, applied in the direction of oxidized water/sewage treatment, special compound water treatment, water/sewage treatment, etc., can solve the problems of low COD concentration requirements, increased operating costs, low energy of ultraviolet lamps, etc., to achieve The effect of saving degradation time, reducing operating costs and improving degradation efficiency

Pending Publication Date: 2021-09-24
SYNFUELS CHINA INNER MONGOLIA CO LTD +1
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AI Technical Summary

Problems solved by technology

However, the current advanced oxidation technology is limited by equipment and operating costs. It can only treat some wastewater with low COD, and the advanced oxidation method cannot be adjusted according to the specific COD, thus causing a waste of resources.
[0005] In addition, the traditional ozone oxidation technology has many problems, such as low dissolved ozone, low ozone utilization rate, and the inability to adjust the amount of ozone generated according to the COD value in real time, resulting in a waste of ozone. Moreover, the traditional ultraviolet lamp has low energy and short life, and needs to be replaced frequently In order to maintain the efficiency of free radical excitation, it increases the cost of equipment
[0006] For example: Chinese patent application CN 110156143 A discloses a UV photocatalysis / microbubble ozonation wastewater advanced treatment system. Although it generates microbubbles and increases the efficiency of ozone dissolution, the size of the microbubbles is uneven, and the treatment time is long, and the COD The concentration requirement is too low, the adaptability and flexibility are poor, and the life of the ultraviolet lamp is short, which increases the operating cost of the equipment
Chinese patent application CN 107381712 A discloses a photoelectric-ozone catalytic oxidation method for intensified treatment of refractory and high-salt wastewater. The ozone utilization rate is low, and TiO 2 Although it increases the adsorption of hydroxyl radicals, it also increases the operating cost, the reaction time is long, the process is complicated, the operation is inconvenient, and the equipment cost is high.
Chinese patent application CN109052615A discloses a free radical advanced oxidation technology. Its ozone utilization rate is low, the oxidation time is too long, the operation is complicated, the life of the ultraviolet lamp is short, and chemical reagents are used as catalysts, causing secondary pollution and causing excessive operating costs. high

Method used

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  • Multi-dimensional advanced oxidation organic wastewater advanced treatment method and system
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  • Multi-dimensional advanced oxidation organic wastewater advanced treatment method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Coal gasification black water with a COD value of 881mg / L was treated by a multi-dimensional advanced oxidation organic wastewater treatment method.

[0081] Water flow 1.4m 3 / h, pH is 8.0, ozone intake volume is 0.14m 3 / h, using a gas-liquid mixing pump as a microbubble generator, a microwave electrodeless ultraviolet lamp, a wavelength of 185-254nm, a power of 2000W, a hydraulic cavitation number of 0.14, a cavitation pretreatment COD degradation rate of 25.2%, and an iron-based ozone catalyst of 50kg. The coal gasification black water circulation treatment with different residence time, the treatment capacity is 100L, the time and COD change values ​​are shown in Table 1:

[0082] Table 1 Advanced Oxidation of Gasified Black Water

[0083]

Embodiment 2

[0084] Embodiment 2, multi-dimensional advanced oxidation and ozone / ultraviolet combined use comparison

[0085] In this example, the effect of multi-dimensional advanced oxidation combined with ozone ultraviolet is discussed, in order to determine the relative ability of multi-dimensional advanced oxidation to reduce COD value. The Fischer-Tropsch synthesis tower water is used, and its composition is shown in Table 2. It can be seen that the Fischer-Tropsch tower water is mainly composed of small molecular acids, the most important being acetic acid, which is relatively difficult to remove.

[0086] Table 2 Composition of Fischer-Tropsch kettle water

[0087]

[0088] The COD value of Fischer Tower kettle water is 14340mg / L, pH is 2.3, and the water flow rate of multi-dimensional advanced oxidation sewage treatment is 1.4m 3 / h, ozone intake volume 0.14m 3 / h, microwave electrodeless ultraviolet lamp, wavelength 185-254nm, power 800W, hydraulic cavitation number 0.2, cav...

Embodiment 3

[0093] The multi-dimensional advanced oxidation organic wastewater treatment method is used to treat phenol solution, the purpose is to simulate phenol-containing wastewater, the COD value of phenol solution is 1062mg / L, and the water flow rate of multi-dimensional advanced oxidation wastewater treatment is 1.4m 3 / h, the gas-liquid mixing pump is used as the microbubble generator, the gas-liquid ratio is 0.1, and the ozone intake volume is 0.14m 3 / h, microwave electrodeless ultraviolet lamp, wavelength 185 ~ 254nm, power 1200W, hydraulic cavitation number 0.16, iron-based ozone catalyst 10kg, hydraulic cavitation degradation rate 42.3%, cyclic treatment of 20L phenol solution, the treatment effect is shown in Table 4.

[0094] Table 4 Advanced oxidation effect of phenolic wastewater

[0095]

[0096] It can be seen from the data in Table 4 that the multidimensional advanced oxidation organic wastewater treatment method has a good degradation efficiency for phenol-containi...

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Abstract

The invention discloses a multi-dimensional advanced oxidation organic wastewater advanced treatment method and system. The treatment method comprises the following steps: carrying out reaction on pretreated wastewater and advanced oxidation gas under a multi-dimensional advanced oxidation condition, so as to realize purification treatment on the wastewater, wherein the advanced oxidizing gas is O2, O3, ClO2 or Cl2, and the multi-dimensional advanced oxidation conditions are 1) or 2): 1) advanced oxidation gas, ultraviolet light and a catalyst; and 2) carrying out electrocatalytic oxidation and / or photocatalytic oxidation by using advanced oxidizing gas, ultraviolet light and a catalyst. The method and the system have the following advantages: ozone is an excellent oxidant, is easy to prepare, can be quickly decomposed in water, and has no secondary pollution; various advanced oxidation technologies are coupled, so that the degradation efficiency is improved, the degradation time is saved, and the method is suitable for various organic wastewater; a pretreatment system is added, so that energy consumption is reduced, and the operation cost is reduced; and the method is green and environment-friendly, simple in process, free of high temperature and high pressure and low in equipment cost.

Description

technical field [0001] The invention relates to a method and system for advanced treatment of multi-dimensional advanced oxidation organic wastewater, belonging to the technical field of water treatment. Background technique [0002] With the development of my country's industry, the discharge of industrial water and wastewater is gradually increasing, and the harm to the ecological environment is becoming more and more serious. In areas with severe water shortages, high water consumption seriously restricts the sustainable development of enterprises. As a country rich in coal and poor in oil and gas, my country bears the brunt of the problem of coal chemical wastewater treatment. [0003] As environmental protection requirements become increasingly stringent, realizing "zero discharge" of coal chemical wastewater and making full use of limited water resources is the key to solving the problem of coal chemical water use. The salty wastewater can be recycled and reused throu...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/78C02F1/32C02F1/461
CPCC02F1/725C02F1/727C02F1/763C02F1/78C02F1/32C02F1/4672C02F1/4674C02F2201/782C02F2201/784C02F2305/10C02F2209/08C02F2303/14
Inventor 贾梦磊耿春宇陈晓锐白垚李国强史培境赵玉柱王缠和董根全高琳杨勇李永旺
Owner SYNFUELS CHINA INNER MONGOLIA CO LTD
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