A method for resource utilization of high-concentration organic wastewater
An organic wastewater, high-concentration technology, applied in chemical instruments and methods, water pollutants, natural water treatment, etc., can solve the problems of no zero discharge, low system water recovery rate, poor treatment effect, etc. The effect of reducing, difficult to biochemical degradation, fast and efficient treatment
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Embodiment 1
[0073] This embodiment provides a system for resource utilization of high-concentration organic wastewater. The system includes an evaporation unit, a wet catalytic oxidation treatment unit, a steam-water separation unit, and a brine separation unit connected in sequence.
[0074] The evaporation unit includes a multi-effect evaporator and a steam boiler connected in sequence.
[0075] The liquid outlet of the steam-water separation unit is connected with the feed port of the brine separation unit, and the gas outlet of the steam-water separation unit is connected with the feed port of the evaporation unit.
[0076] The system also includes a post-processing unit, the feed port of the post-processing unit is connected with the liquid outlet of the steam-water separation unit, and the discharge port of the post-processing unit is connected with the feed port of the brine separation unit.
[0077] The post-treatment unit includes a biological treatment unit and / or an adsorption ...
Embodiment 2
[0084] This embodiment provides a system for resource utilization of high-concentration organic wastewater. The system refers to Embodiment 1, the only difference is that the evaporation unit includes a steam boiler.
[0085] Utilize the method for above-mentioned system to process organic waste water, comprise the steps:
[0086] (1) The organic wastewater to be treated is entered into a steam boiler for evaporation treatment. The treatment temperature is 100-250° C., and the treatment time is 2-8 hours to obtain steam and residual liquid I. The steam pressure is 3-5 MPa, which is used in the production unit ;
[0087] (2) The residual liquid I obtained in step (1) is subjected to wet catalytic oxidation treatment, the treatment temperature is 150-250° C., the pressure is 1-3 MPa, and the residence time is 30-50 minutes to obtain the treated product;
[0088] (3) Separating the treated product obtained in step (2) from steam to water to obtain gas and residual liquid II, the g...
Embodiment 3
[0091] Coal gasification wastewater has complex components and a large amount of water. Pollutants mainly include ammonia, carbon dioxide, hydrogen sulfide, unit phenols, polyphenols, and fatty acids; among them, the content of phenols is as high as 5,000-10,000 mg / L, and the COD is 20,000-50,000 mg / L.
[0092] This embodiment provides a method for resource utilization of coal gasification wastewater. The method is carried out according to the system in Embodiment 1, and its process flow chart is as follows figure 2 As shown, it specifically includes the following steps:
[0093] (1) Set the total amount to 1m 3 , the coal gasification wastewater with a COD content of 30,000-35,000mg / L is passed into a multi-effect evaporator and a steam boiler for evaporation treatment in sequence. The treatment temperatures are 100°C and 200°C respectively, the treatment time is 4h, and the generated steam pressure is 2MPa. Steam and residual liquid I, the steam is passed into the coal gas...
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