Matching device and method of novel rectifying tower system with internal energy integration
A technology of internal energy and rectification tower, which is applied in the field of rectification tower, can solve the problems of high energy consumption, close boiling point of rectification separation, high operating cost, etc., and achieve the effect of increasing heat exchange area, saving energy consumption and cost
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[0033] Example 1
[0034] The rectification tower separates benzene and toluene from the BTX system, adopts the process of the present invention, and the top feed of the rectification section of the rectification tower with internal energy integration is characterized by a mass flow rate of benzene and toluene feed of 100kg / hr and a mass flow rate of toluene feed. 100kg / hr, saturated liquid feed, the feed pressure is 1bar, the number of theoretical plates in the rectification section is 10, the working pressure is 4bar, the working pressure of the stripping section is 1bar, the working pressure is 1bar, and the feed position is the internal energy integration precision The first tray in the stripping section of the distillation column has a reflux ratio of 1.16 and a top gas temperature of 90°C. After compression, its pressure is 4 bar and the compressor outlet temperature is 145°C. When the device is started, the heat load of the heat exchanger at the bottom of the tower is 17.3...
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[0035] Example 2
[0036] The overall process is the same as Example 1, but the difference is: benzene and toluene feed mass flow rate is 1000 kg / hr, toluene feed mass flow rate is 1000 kg / hr, saturated liquid feed, feed pressure is 1 bar, rectification section theory The number of plates is 10, the working pressure is 5bar, the working pressure of the stripping section is 1bar, the working pressure is 1bar, the feed position is the first plate of the stripping section of the internal energy integrated distillation column, the reflux ratio is 0.986, and the temperature of the top gas After compression, the pressure is 5bar and the compressor outlet temperature is 155℃. When the device is started, the heat load of the heat exchanger at the bottom of the tower is 145KW / hr, the power of the compressor is 105.2kw, and the latent heat of condensation of the vapor at the top of the tower is 120.6KW. The heat flux exchanged by each theoretical plate is 730.86kcal / hr.m 2 .k Under the sa...
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