Methanol preparation equipment

Abstract

The invention discloses a methanol preparation equipment, comprising an incineration device, an absorption tower connected with the incineration device and a tail gas fan, a circulation pump and a reactor connected with the absorption tower, a configuration tank connected with the circulation pump, and a configuration tank The connected finished product tank, flame arresting filter, mixer, superheater installed on the mixer, tail gas heater, air fan, reboiler and methanol pump; the methanol pump and air fan are connected to the reboiler, and the tail gas The blower is connected to the tail gas heater, the reboiler and the tail gas heater are connected to the mixer; the superheater is connected to the reactor through a flame arresting filter. The invention adopts frequency conversion technology to reduce the power consumption of the fan, the system resistance is small, the operation cycle is long, the alcohol consumption is low, the reactor is evenly heated and has a long life, the cooling speed is fast, the occurrence of side reactions is greatly reduced, and the thermal load is controlled in sections. Improve absorption efficiency and reduce circulating water consumption.

Description

technical field [0001] The invention relates to the field of mechanization and chemical engineering, in particular to methanol preparation equipment. Background technique [0002] At present, when the domestic formaldehyde preparation device is in operation, when the oxygen-alcohol ratio in the quaternary mixed gas is controlled at 0.4, the system resistance is about 35kPa. After one week, the system resistance rises to 38kPa, and the longest running time of the device is 26.5d. The time is only 18.2 days, and the methanol consumption is relatively high. The average consumption of methanol per ton of 37% formaldehyde is 480kg (the design index is 435kg). , the temperature difference of the silver layer exceeds 30°C is serious, there are 3 to 5 dark spots of 30 mm in the silver layer, the methanol content in the finished formaldehyde is high, the methanol content in the tail gas is also high, and the methanol consumption is high. When it reaches the top of the tower, the low...

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Problems solved by technology

[0002] At present, when the domestic formaldehyde preparation device is in operation, when the oxygen-alcohol ratio in the quaternary mixed gas is controlled at 0.4, the system resistance is about 35kPa. After one week, the system resistance rises to 38kPa, and the longest running time of the device is 26.5d. The time is only 18.2 days, and the methanol consumption is relatively high. The average consumption of methanol per ton of 37% formaldehyde is 480kg (the design index is 435kg). , the temperature difference of the silver layer exceeds 30°C is serious, there are 3 to 5 dark spots of 30 mm in the silver layer, the methanol content in the finished formaldehyde is high, the methanol content in the tail gas is also high, and the methanol consumption is high. When it reaches the top of the tower, the lower liquid is slow, the system resistance increases, white polyoxymethylene is produced on the packing, the lower liquid is unevenly distributed, there is a phenomenon of "flooding" at the top of the tower, the bottom tube plate of the oxidation reactor is heated unevenly, and the quenching section is not heated Uniform, cracked

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