Treatment method of maleic anhydride production waste liquid
A treatment method and technology for waste liquid, applied in combustion methods, chemical instruments and methods, heating water/sewage treatment, etc., can solve the problems of large fuel gas consumption, low B/C ratio, uneconomical, etc., and reduce production and operation. Cost, lower operating temperature, less coking effect
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[0023] Example 1
[0024] The waste liquid indicators of maleic anhydride device are shown in the following table:
[0025] Table 1 Waste liquid index of maleic anhydride device
[0026]
[0027] The waste liquid enters the preheater through the feed pump, the feed rate is 10000kg / h, the first-effect evaporator uses 4500kg / h steam heating, the steam pressure is 0.3MPa, and the gas outlet pressure of the three-effect evaporator is controlled to 12KPaA, at this time the first-effect evaporator Gas phase temperature 96℃, bottom liquid phase temperature 108℃, second effect evaporator gas phase temperature 65℃, bottom liquid phase temperature 86℃, triple effect evaporator gas phase temperature 50℃, bottom liquid phase temperature 68℃, triple effect evaporator bottom concentration Liquid discharge 1000kg / h. The maleic anhydride device is equipped with a direct-fired incinerator, and the concentrated liquid is sent to the direct-fired incinerator for processing. Using butane gas as th
Example Embodiment
[0028] Example 2
[0029] The waste liquid index is the same as in Example 1. The waste liquid enters the preheater through the feed pump, the feed rate is 10000kg / h, the first-effect evaporator uses 4500kg / h steam heating, the steam pressure is 0.5MPa, and the gas outlet pressure of the three-effect evaporator is controlled. 20KPaA, the first-effect evaporator has a gas phase temperature of 106°C, the bottom liquid phase temperature is 118°C, the second-effect evaporator has a gas phase temperature of 75°C, and the bottom liquid phase temperature is 96°C, and the three-effect evaporator has a gas phase temperature of 60°C and a bottom liquid phase temperature of 77 ℃, 1000kg / h of concentrated liquid at the bottom of the three-effect evaporator. The maleic anhydride device is equipped with a direct-fired incinerator, and the concentrated liquid is sent to the direct-fired incinerator for processing. Using butane gas as the fuel, controlling the furnace temperature of the dire
Example Embodiment
[0030] Example 3
[0031] The waste liquid indicators are the same as in Example 1. The waste liquid enters the preheater through the feed pump, the feed rate is 10000kg / h, the first-effect evaporator uses 3000kg / h steam heating, the steam pressure is 0.3MPa, and the gas outlet pressure of the three-effect evaporator is controlled. 12KPaA, at this time, the gas phase temperature of the first-effect evaporator is 94℃, the bottom liquid phase temperature is 103℃, the second-effect evaporator gas phase temperature is 66℃, the bottom liquid phase temperature is 81℃, the three-effect evaporator gas phase temperature is 51℃, and the bottom liquid phase temperature is 63℃. ℃, 4000kg / h of concentrated liquid at the bottom of the three-effect evaporator. The maleic anhydride device is equipped with a direct-fired incinerator, and the concentrated liquid is sent to the direct-fired incinerator for processing. Using butane gas as fuel, controlling the furnace temperature of the direct-f
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