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Method for reducing energy consumption of device for preparing olefins from oxy-compound

A technology for producing compounds and olefins, which is applied in the production of hydrocarbons from oxygen-containing organic compounds, organic chemistry, etc., can solve the problems of poor heat exchange effect and large volume of heat exchangers, and achieves reduction of total energy consumption, steam saving, and equipment reduction. effect of investment

Active Publication Date: 2013-03-06
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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Problems solved by technology

[0006] What the present invention aims to solve is the technical problem of poor heat exchange effect between methanol gas raw material and high-temperature reaction oil gas and gas, and relatively large volume of heat exchanger in the existing MTO process technology

Method used

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  • Method for reducing energy consumption of device for preparing olefins from oxy-compound

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Embodiment Construction

[0025] Such as figure 1 As shown, the liquid oxygenate raw material 1 from outside the device is first preheated to an appropriate temperature through the raw material preheater 2, and the temperature is in the range of 20-150°C, preferably in the range of 40-120°C, and most preferably in the range of 60-120°C , the raw material is in a saturated state, and then divided into two strands: one is heated by the raw material vaporizer 3 to vaporize the raw material and becomes a gas-phase raw material; become atomized liquid-phase raw materials, the atomized liquid-phase raw materials are mixed with gas-phase raw materials, and then enter the raw material / reaction gas heat exchanger 6 in the form of mist flow, and fully exchange with the high-temperature reaction from the reactor to generate oil gas 4 Heat is used to recover high-temperature potential heat, and the raw material after recovery of high-temperature potential heat is completely gasified to become high-temperature gasi...

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Abstract

The invention provides a method for reducing energy consumption of a device for preparing olefins from an oxy-compound. The method comprises the following steps that: a liquid oxy-compound raw material is firstly preheated to a certain temperature by a raw material preheater and then is divided into two parts, one part is heated and gasified by a raw material gasifier to become a gas phase raw material and the other part is atomized to become an atomized liquid phase raw material; the gas phase raw material and the atomized liquid phase raw material are mixed in front of a raw material / reaction gas heat exchanger and enter the raw material / reaction gas heat exchanger in the form of mist flow to carry out full heat exchange with oil gas generated through high-temperature reaction from a reactor so as to recover the high-temperature level heat of the oil gas generated through high-temperature reaction, the raw material after recovering the high-temperature level heat is totally gasified to become the high-temperature gasified raw gas and the high-temperature gasified raw gas then enters the reactor to undergo reaction; and the oil gas generated through high-temperature reaction from the reactor undergoes heat exchange in the raw material / reaction gas heat exchanger and then is sent to a rear chilled water washing system. The method has the advantages that the heat exchange effect of the heat exchanger can be effectively improved, the volume of the heat exchanger can be reduced and the energy consumption of the device can be reduced.

Description

technical field [0001] The invention relates to a method for reducing device energy consumption in the continuous reaction and regeneration process using oxygen-containing compounds as raw materials and low-carbon olefins as main products. Background technique [0002] Light olefins such as ethylene, propylene, and butadiene, and light aromatics such as benzene, toluene, and xylene are basic raw materials for petrochemicals. At present, the production of ethylene mainly relies on the tube furnace steam cracking process using light naphtha as raw material. Due to the shortage of crude oil resources and the increasing price, naphtha resources have become more and more insufficient, and the production cost of low-carbon olefins is getting higher and higher. At home and abroad, ethylene production routes with richer raw material sources are being actively developed. With methanol, ethanol, dimethyl ether, C 4 ~C 10 Alcohol compounds or their mixtures are used as raw materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C11/02
Inventor 施磊乔立功汤红年陈俊武刘昱张洁昌国平李海瑞
Owner CHINA PETROLEUM & CHEM CORP
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