A method for treating catalyst production wastewater
A technology for the production of wastewater and treatment methods, which is applied in natural water treatment, multi-stage water treatment, chemical instruments and methods, etc., can solve the problems of low cost, high cost of catalyst production wastewater treatment, and only mixed salt crystals can be obtained. Effect of increasing content and evaporation efficiency
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Embodiment 1
[0134] Such as figure 1 As shown, the catalyst production wastewater (containing NaCl 52g / L, Na 2 SO 4 99g / L, NH 4 Cl 24.5g / L, (NH 4 ) 2 SO 4 47.4g / L, pH is 6.8) by the first circulation pump 71 with the feeding amount as 5m 3 The speed of / h is sent into the pipeline of treatment system, in the main pipeline that is sent into the first heat exchange device 31 and the fifth heat exchange device 35 (titanium alloy plate heat exchanger) by the first pH value measuring device 61 ( pH meter) monitors the pH value after mixing (the measured value is 7.9), and a part of the catalyst production wastewater (2.8m 3 / h) sent to the first heat exchange device 31, and carried out the first heat exchange with the recovered first ammonia-containing steam condensate to raise the temperature of the catalyst production wastewater to 118 ° C, and the remaining part was sent to the fifth heat exchange device 35, and the first heat exchange with the first The concentrated liquid is subje...
Embodiment 2
[0144] Carry out the treatment of catalyst production waste water according to the method for embodiment 1, difference is: to containing NaCl 101g / L, NaCl 2 SO 4 99g / L, NH 4 Cl 11g / L, (NH 4 ) 2 SO 4 11g / L, pH is 6.8 catalyst production wastewater is processed, and the SO contained in the wastewater to be treated obtained 4 2- and Cl - The molar ratio is 1:9.249. The temperature of the wastewater after heat exchange by the first heat exchange device 31 , the fifth heat exchange device 35 and the seventh heat exchange device 37 is 108°C. The evaporation conditions of the first multiple-effect evaporator 2 and the second multiple-effect evaporator 1 are shown in Table 2 below. The temperature of low temperature treatment is 25°C, and the residence time is 55min.
[0145] Table 2
[0146]
[0147] The first solid-liquid separation device 91 obtains 656.55 kg of sodium chloride crystallization filter cake with a water content of 14 mass % per hour, and finally obtain...
Embodiment 3
[0151] Carry out the treatment of catalyst production waste water according to the method for embodiment 1, difference is: to containing NaCl 149g / L, NaCl 2 SO 4 66g / L, NH 4 Cl 28g / L, (NH 4 ) 2 SO 4 12.6g / L, pH is 6.7 catalyst production wastewater is processed, and the SO contained in the wastewater to be treated obtained 4 2- and Cl - The molar ratio is 1:10.566. The temperature of the catalyst production wastewater after heat exchange through the first heat exchange device 31 , the fifth heat exchange device 35 and the seventh heat exchange device 37 is 106°C. The evaporation conditions of the first multiple-effect evaporator 2 and the second multiple-effect evaporator 1 are shown in Table 3 below. The temperature of low temperature treatment is 30°C, and the residence time is 50min.
[0152] table 3
[0153]
[0154] The first solid-liquid separation device 91 obtains 1059.54 kg of sodium chloride crystallization filter cake containing 15 mass % of water per...
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Abstract
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