Device and method of utilizing solar energy light-heat-electric coupling to treat acrylonitrile sewage
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A technology of acrylonitrile and solar energy, applied in the field of sewage treatment, can solve the problems of high energy consumption, complex electrocatalytic oxidation process route, etc., and achieve the effect of solving the complex process route
Active Publication Date: 2015-07-29
NORTHEAST GASOLINEEUM UNIV
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Solve the shortcomings of complex electrocatalytic oxidation process route and high energy consumption
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preparation example Construction
[0046] Preparation of acrylonitrile simulated sewage:
[0047] (1) Measure an appropriate amount of acrylonitrile, dissolve it in water to prepare a 1000 mg / L stock solution, store it at 4°C, and dilute it to the required concentration when used.
[0048] (2) Weigh an appropriate amount of sodium sulfate, dissolve it in water to form a 50g / L electrolyte stock solution, and dilute to the required concentration when used. Wherein the sodium sulfate concentration that adopts in the example is 5g / L.
[0049] 001 Indoor experimental research:
[0050] The indoor electrolysis device in this experiment is as follows: figure 1 shown, using figure 1 Middle 2 provides the temperature required for electrolysis and continues to stir, and at the same time uses a self-made glass container as an electrolytic cell to hold a well-mixed acrylonitrile electrolyte. A two-electrode system was used in the experiment, the cathode (such as figure 1 3) using pure platinum electrodes, the anode...
example 1
[0051] Example 1: The anode uses Ti / (IrO 2 &Ta 2 o 5 ) electrode, the cathode is a platinum electrode, with a rate of 6mA / cm 2 The current density is 40min, the reaction time is 40min, pH=3, and the reaction temperature is 50°C. The acrylonitrile wastewater with a concentration of 200mg / L is degraded, and the COD removal rate after degradation of the acrylonitrile wastewater is 48%.
example 2
[0052] Example 2: The anode uses Ti / (IrO 2 &Ta 2 o 5 ) electrode, the cathode is a platinum electrode, with a rate of 6mA / cm 2 The current density is 1h, the reaction time is 1h, the pH=7, and the reaction temperature is 50°C. The acrylonitrile wastewater with a concentration of 200mg / L is degraded, and the COD removal rate after degradation of the acrylonitrile wastewater is 47.1%.
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Abstract
The invention relates to a device and method of utilizing solar energy light-heat-electric coupling to treat acrylonitrile sewage. The device comprises a solar energy light-heat-electricity conversion system, wherein the solar energy light-heat-electricity conversion system comprises a photo-thermal unit, a photoelectric unit and an electrochemical unit; the photo-thermal unit comprises a focusing lens for adjusting the temperature of the electrochemical unit; the photoelectric unit adopts a photocell; the electrochemical unit adopts an electrolytic tank. The method comprises the following steps: 1) constructing the device for degrading polyacrylamide; 2) adjusting the photo-thermal unit and the photoelectric unit; 3) performing the electrolytic process in a diaphragm-free electrolytic cell, wherein the electrolytic process is completed according to the constant voltage of 3-10 V, the electrolyte of the electrolytic solution is 5-20 g / L of Na2SO4, the pH value of the electrolytic solution is 4-12, the temperature is 20 DEG C above, the polyacrylamide solution is gradually added into the electrolyte. The device and method disclosed by the invention are simple and practical, high in degradation rate, energy-saving and environmentally friendly.
Description
technical field [0001] The invention relates to the technical field of sewage treatment produced in the exploitation of oil and gas fields and the manufacture of chemical products, in particular to a device and method for treating acrylonitrile industrial wastewater by utilizing solar light-heat-electric coupling oxidation. Background technique [0002] Acrylonitrile (acrylonitrile, AN) is mainly used in the production of acrylic fiber, nitrile rubber, adiponitrile, acrylamide, ABS resin, etc., and is the basic raw material of three major synthetic materials (synthetic fiber, plastic, synthetic rubber). multiple usage. In recent years, with the growing demand for downstream synthetic materials, my country's acrylonitrile production capacity and output have been rapidly increased. In the production process of acrylonitrile, a large amount of industrial wastewater containing toxic substances such as acrylonitrile, hydrocyanic acid, and acetonitrile is produced. If it is disch...
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