A kind of treatment process of epichlorohydrin production waste water
A technology for the production of epichlorohydrin and waste water, which is applied in the direction of oxidized water/sewage treatment, water/sewage treatment, natural water treatment, etc. It can solve the problems of complicated treatment steps and increase the cost of waste water treatment, and achieve low cost of waste water treatment, The effect of small footprint and simple process flow
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Embodiment 1
[0026] A kind of epichlorohydrin production wastewater, the TOC of the wastewater is measured to be about 13000mg / L, the pH=10.5, and the salt content is 3%.
[0027] (1) Wet oxidation: The epichlorohydrin wastewater was treated by wet oxidation, and the salt-containing filtrate I was obtained by filtration, and its TOC was determined to be 680mg / L. Wet oxidation reaction conditions: the gas is air, the reaction temperature is 260°C, the reaction pressure is 2MPa, and the reaction time is 2h;
[0028] (2) UV-H 2 o 2 Oxidation: adjust the pH of the salt-containing filtrate I obtained in step 1 to 5, add 2% hydrogen peroxide (the quality of the salt-containing filtrate I is the benchmark), stir evenly, then place it in a photocatalytic reactor, turn on the 300w ultraviolet light source, and react for 1h , the salt-containing filtrate II was obtained, and its TOC was reduced to 18mg / L;
[0029] (3) Preparation of caustic soda: The salt-containing filtrate II obtained in step 2...
Embodiment 2
[0031] A kind of epichlorohydrin production wastewater, the TOC of the wastewater is measured to be about 13000mg / L, the pH=10.5, and the salt content is 3%.
[0032] (1) Catalytic wet oxidation: Epichlorohydrin waste water was treated by wet oxidation, filtered and separated to obtain salt-containing filtrate I, and its TOC was determined to be 386mg / L. Catalytic wet oxidation reaction conditions: the catalyst is CuSO 4 , the dosage is 0.5% of the waste water, the gas is air, the reaction temperature is 260°C, the reaction pressure is 2MPa, and the reaction time is 2h;
[0033] (2) UV-H 2 o 2 Oxidation: adjust the pH of the salt-containing filtrate I obtained in step 1 to 5, add 2% hydrogen peroxide (the quality of the salt-containing filtrate I is the benchmark), stir evenly, then place it in a photocatalytic reactor, turn on the 300w ultraviolet light source, and react for 1h , the salt-containing filtrate II was obtained, and its TOC was reduced to 8mg / L;
[0034] (3) ...
Embodiment 3
[0036] A kind of epichlorohydrin production wastewater, the TOC of the wastewater is measured to be about 13000mg / L, the pH=10.5, and the salt content is 3%.
[0037] (1) Wet oxidation: The epichlorohydrin wastewater was treated by wet oxidation, filtered and separated to obtain salt-containing filtrate I, and its TOC was determined to be 680mg / L. Wet oxidation reaction conditions: the gas is air, the reaction temperature is 260°C, the reaction pressure is 2MPa, and the reaction time is 2h;
[0038] (2) UV-H 2 o 2 Oxidation: adjust the pH of the salt-containing filtrate I obtained in step 1 to 5, add 2% hydrogen peroxide, stir evenly, then place it in a photocatalytic reactor, turn on a 300w ultraviolet light source, and react for 1 hour to obtain the salt-containing filtrate II, whose TOC After adding 0.4% hydrogen peroxide and continuing to react for 1 hour, the measured filtrate TOC dropped to 7mg / L.
[0039] (3) Preparation of caustic soda: The salt-containing filtrate ...
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