A method for treating catalyst production wastewater
A technology for the production of waste water 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, only mixed salt crystals can be obtained, and high cost of catalyst production waste water treatment, so as to improve Effect of Content and Evaporation Efficiency
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Embodiment 1
[0128] like figure 1 As shown, the catalyst production wastewater (containing NaCl 189g / L, Na 2 SO 4 12g / L, NH 4 Cl31g / L, (NH 4 ) 2 SO 4 2g / L, pH is 7.2) with feed amount of 5m 3 The speed of / h is fed into the pipeline of the treatment system, and the hydrogen with a concentration of 45.16 mass % is introduced into the pipeline before the first heat exchange device 31 or the fifth heat exchange device 35 (titanium alloy plate heat exchanger). The pH value of the sodium oxide aqueous solution is adjusted for the first time, and the pH value after mixing is monitored by the first pH value measuring device 61 (pH meter) (the measured value is 8), and the first circulating pump 71 is used. Part (5m 3 / h) is sent to the first heat exchange device 31, and the first heat exchange is carried out with the recovered first ammonia-containing steam condensate water to heat the catalyst production waste water to 105 ° C, and the rest is sent to the fifth heat exchange device 35, ...
Embodiment 2
[0138] Carry out the treatment of catalyst production wastewater according to the method of embodiment 1, the difference is: to the NaCl 48g / L, Na 2 SO 4 150g / L, NH 4 Cl 14g / L, (NH 4 ) 2 SO 4 44.5g / L catalyst production wastewater with a pH of 6.9 was treated, and the SO contained in the wastewater to be treated was obtained. 4 2- and Cl - The molar ratio is 1:11.051. The temperature of the catalyst production wastewater after heat exchange through the first heat exchange device 31 and the fifth heat exchange device 35 is 107°C, and the temperature of the wastewater to be treated after heat exchange through the second heat exchange device 32 is 117°C. The evaporation conditions of the MVR evaporation device 2 and the multi-effect evaporation device 1 are shown in Table 2 below. The temperature of the low temperature treatment was 35°C and the residence time was 50min.
[0139] Table 2
[0140]
[0141] The first solid-liquid separation device 91 obtains 369.58kg...
Embodiment 3
[0145] Carry out the treatment of catalyst production wastewater according to the method of Example 1, the difference is: to the NaCl 101g / L, Na 2 SO 4 100g / L, NH 4 Cl 18.5g / L, (NH 4 ) 2 SO 4 18.6g / L catalyst production wastewater with a pH of 6.9 was treated, and the SO contained in the obtained wastewater to be treated 4 2- and Cl - The molar ratio is 1:8.779. The temperature of the catalyst production wastewater after heat exchange through the first heat exchange device 31 and the fifth heat exchange device 35 is 107°C, and the temperature of the wastewater to be treated after heat exchange through the second heat exchange device 32 is 117°C. The evaporation conditions of the MVR evaporation device 2 and the multi-effect evaporation device 1 are shown in Table 3 below. The temperature of the low temperature treatment was 20°C, and the residence time was 60 min.
[0146] table 3
[0147]
[0148] The first solid-liquid separation device 91 obtains 712.43kg ton...
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