Device for preparing dimethyl ether by methanol vapor-phase catalytic dehydration
A technology for catalytic dehydration and dimethyl ether, which is used in the dehydration of hydroxyl-containing compounds to prepare ether, ether preparation, chemical industry, etc., can solve the problems of increasing the consumption of cooling water, increase the consumption of external heat, etc., and achieve the effect of reducing heat
Inactive Publication Date: 2013-05-08
河北裕泰化工有限公司
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Problems solved by technology
[0002] At present, the crude methyl ether gas coming out of the reactor in the gas-phase catalytic dehydration of methanol into dimethyl ether is condensed and then enters the crude methyl ether storage tank, and then pumped out through the crude methyl ether preheater and injected into the middle of the rectification tower. Use external heat at the bottom of the rectification tower to heat the reboiler of the rectification tower, which not only increases the consumption of external heat, but also increases the consumption of cooling water
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[0022] Such as figure 1 As shown, the methanol gas-phase catalytic dehydration device for producing dimethyl ether consists of a start-up heater 1, a gas heat exchanger 2, a reactor 3, a vaporization tower 5, a vaporization tower reboiler 6, a methanol preheater 7, and a crude methyl ether preheater. Heater 8, crude methyl ether condenser 10, crude methyl ether storage tank 11, washing tower 12, rectification tower condenser 13, reflux tank 14, kettle liquid storage tank 15, rectification tower 17, rectification tower reboiler 16. The gas cooler 20 and the absorption liquid condenser 9 are composed. The shell-side inlet of the methanol preheater 7 is connected to the external methanol pipeline, and the shell-side outlet of the methanol preheater 7 is connected to the upper inlet of the vaporization tower 5. The vaporization tower 5 The top outlet of the gas heat exchanger 2 is connected with the shell-side inlet of the gas heat exchanger 2, and the tube-side outlet of the gas ...
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The invention discloses a device for preparing dimethyl ether by methanol vapor-phase catalytic dehydration. The device consists of a heater, a gas heat exchanger, a reactor, a vaporization tower, a vaporization tower reboiler, a methanol preheater, a crude methyl ether preheater, a crude methyl ether condenser, a crude methyl ether storage tank, a washing tower, a rectifying tower condenser, a reflux tank, a kettle liquid storage tank, a rectifying tower, a rectifying tower reboiler, a gas cooler and an absorbed liquid condenser, wherein a vice vaporization tower reboiler is added in the device. Compared with the prior art, by using the device in the invention, the reaction heat generated after reaction can be fully utilized, and the heat supplied from the outside is reduced, thereby achieving the purposes of saving energy, reducing preparation cost and increasing economical benefits.
Description
technical field [0001] The invention relates to a device for producing dimethyl ether by catalytic dehydration of methanol in gas phase, in particular to a device for producing dimethyl ether by catalytic dehydration of methanol in gas phase, which can make full use of reaction heat, reduce the supply of external heat sources, save fuel, and reduce production costs. Background technique [0002] At present, the crude methyl ether gas coming out of the reactor in the gas-phase catalytic dehydration of methanol into dimethyl ether is condensed and then enters the crude methyl ether storage tank, and then pumped out through the crude methyl ether preheater and injected into the middle of the rectification tower. At the bottom of the rectification tower, external heat is used to heat the reboiler of the rectification tower. In this process, the consumption of external heat is increased, and the consumption of cooling water is also increased. Therefore, it is a technical problem ...
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IPC IPC(8): C07C43/04C07C41/09
CPCY02P20/10
Inventor 李玉朝王建军李用林游丽萍曹树林
Owner 河北裕泰化工有限公司