Method for treating DMF (Dimethyl Formamide)-containing wastewater
A treatment method and wastewater technology, applied in water/sewage treatment, degassed water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of high water quality requirements and difficulty in solving high-concentration total nitrogen-containing wastewater, etc. The steps are simple, the difficulty of wastewater treatment is reduced, and the operation is convenient.
Pending Publication Date: 2022-03-25
ANHUI JINGHE IND
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Problems solved by technology
[0002] The waste water containing ammonia nitrogen and organic nitrogen such as DMF produced in the production process of sucralose, the denitrification in traditional biochemistry to reduce total nitrogen has high requirements on water quality, it is difficult to solve the waste water containing high concentration of total nitrogen, especially the waste water containing DMF can only be used Biochemical systems are difficult to deal with thoroughly
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[0016] see figure 1 A treatment method containing DMF wastewater, comprising the following steps:
[0017] (1) Draw out the wastewater containing DMF and organic nitrogen from the wastewater pool, add liquid caustic soda to adjust the pH of the wastewater to 10-12, and the said liquid caustic is 32% sodium hydroxide solution;
[0018] (2) Through the lifting pump, the waste water after pH adjustment is sequentially passed through the series-connected 1# plate heat exchanger, 2# plate heat exchanger, and 3# plate heat exchanger, and sent to the alkaline hydrolysis tower for alkaline hydrolysis reaction, of which 1# The plate heat exchanger raises the temperature of the wastewater to 60°C, the 2# plate heat exchanger raises the temperature of the waste water to 90°C, and the 3# plate heat exchanger raises the temperature of the waste water to 120°C, and the DMF in the waste water is combined with sodium hydroxide in the alkaline hydrolysis tower The reaction generates dimethyla...
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A DMF-containing wastewater treatment method comprises the following steps: introducing DMF-containing wastewater into an alkaline hydrolysis tower, adding a proper amount of liquid caustic soda into a water inlet pipeline, mixing, mixing with wastewater, heating through a heat exchanger, feeding into the alkaline hydrolysis tower, feeding the wastewater subjected to alkaline hydrolysis into a deamination tower, carrying out negative pressure pumping through a negative pressure system, and pumping out ammonia gas and dimethylamine obtained by alkaline hydrolysis. Ammonia gas and dimethylamine are absorbed by the ammonia recovery device, tail gas is absorbed by the tail gas absorption tower, and water of the ammonia recovery device for absorbing the ammonia gas enters the ammonia water tank, so that the aims of performing alkaline deamination on the DMF-containing wastewater and reducing total nitrogen are fulfilled. According to the method, the total nitrogen in the wastewater can be reduced, so that the wastewater treatment difficulty of a biochemical system is reduced, and the purpose of up-to-standard discharge of treated wastewater is achieved.
Description
technical field [0001] The invention relates to a treatment method for DMF-containing wastewater. Background technique [0002] The waste water containing ammonia nitrogen and organic nitrogen such as DMF produced in the production process of sucralose, the denitrification in traditional biochemistry to reduce total nitrogen has high requirements on water quality, it is difficult to solve the waste water containing high concentration of total nitrogen, especially the waste water containing DMF can only be used Biochemical systems are difficult to deal with thoroughly. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a treatment method for DMF-containing wastewater, which can reduce the total nitrogen in the wastewater, thereby reducing the difficulty of wastewater treatment in biochemical systems, and achieving the purpose of wastewater treatment and discharge. [0004] For solving the problems of the technologie...
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Login to View More IPC IPC(8): C02F9/10B01D53/18B01D53/14B01D5/00C02F101/38
CPCC02F9/00B01D53/18B01D53/1406B01D5/0015B01D5/0075B01D5/0093C02F1/66C02F1/586C02F1/20C02F2101/38B01D2252/103B01D2257/406B01D2257/90
Inventor 张正颂秦锦能程远健
Owner ANHUI JINGHE IND