A kind of isophthalonitrile production wastewater treatment system and method
An isophthalonitrile and a technology using isophthalonitrile are applied in the field of pollutant treatment, can solve the problems of complex process, high cost, unstable treatment effect and the like, and achieve high pollutant removal rate and low energy consumption. Effect
Active Publication Date: 2022-03-22
JIANGSU XINHE AGROCHEM
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Problems solved by technology
[0008] However, the process of chemical treatment of wastewater is complicated, and a variety of additional components need to be added at the same time, the cost is high, and the treatment effect is unstable, and there are defects in biological methods.
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Embodiment 1
[0073] This embodiment provides a kind of isophthalonitrile production wastewater treatment system, the structure diagram of the isophthalonitrile production wastewater treatment system is as follows figure 1 As shown, it includes: a filter device 1, a preheating unit 2, a three-effect countercurrent evaporator, a gas-liquid separation unit and a concentrated liquid combustion unit.
[0074] The discharge port of the preheating unit 2 is connected to the feed port of the three-effect evaporator 51 in the three-effect countercurrent evaporator, and the condensate outlet of the three-effect evaporator 51 in the three-effect countercurrent evaporator is connected to the gas-liquid separation unit , the liquid outlet of the first-effect evaporator 31 in the three-effect countercurrent evaporator is connected with the concentrated liquid combustion unit through a jacketed pipe.
[0075]The concentrated liquid combustion unit includes a direct combustion furnace 81 , a heat exchange...
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Abstract
The present invention provides a treatment system and method for isophthalonitrile production wastewater. The treatment system for isophthalonitrile production wastewater includes a preheating unit, a multi-effect evaporation unit, a gas-liquid separation unit, and a concentrated liquid combustion unit; The discharge port of the preheating unit is connected to the feed port of the multi-effect evaporation unit, the exhaust port of the multi-effect evaporation unit is connected to the gas-liquid separation unit, and the liquid outlet of the multi-effect evaporation unit is connected to the concentrated liquid combustion unit; The concentrated liquid combustion unit includes a concentrated liquid combustion device, a heat exchange device and a tail gas treatment device connected in sequence. The present invention concentrates and treats isophthalonitrile production wastewater, and burns the concentrated solution to make the isophthalonitrile production wastewater a resource, and the system provided by the present invention has low energy consumption and high pollutant removal rate, It has a positive effect on environmental protection.
Description
technical field [0001] The invention belongs to the technical field of pollutant treatment, and relates to a waste water treatment system and method, in particular to a waste water treatment system and method for isophthalonitrile production. Background technique [0002] The raw materials for synthesizing isophthalonitrile are m-xylene, ammonia and air, and the ammoxidation reaction is carried out in a fluidized bed. This reaction will generate a certain amount of HCN and H while generating isophthalonitrile 2 O, ammonia needs to be in excess of about 50%. After the subsequent capture process, HCN enters the water to form a total cyanide concentration of 500-800mg / L, an ammonia nitrogen concentration of 20000-28000mg / L, and a total nitrogen concentration of 32000-35000mg / L And the COD is 12000-20000mg / L. Isophthalonitrile production wastewater has complex components, high COD, strong alkalinity, high concentrations of ammonia nitrogen and cyanide, and is difficult to trea...
Claims
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IPC IPC(8): C02F1/04F23G7/00B01D53/86B01D53/90B01D53/56B01D47/06C02F101/16C02F101/18C02F103/36
CPCC02F1/04F23G7/008B01D53/8631B01D53/90B01D47/06F23G2209/101F23G2206/20C02F2103/36C02F2301/08C02F2101/16C02F2101/18
Inventor 王海波刘建伟石斌禚文峰
Owner JIANGSU XINHE AGROCHEM