A method and system for producing hydrocarbons from methanol

A technology for producing hydrocarbons and methanol from methanol, which is applied to chemical instruments and methods, producing hydrocarbons from oxygen-containing organic compounds, and production of bulk chemicals, etc. The effect of reducing electricity consumption, large heat transfer coefficient and increasing steam output

Active Publication Date: 2018-08-10
SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to overcome the impact on the device or the catalyst activity (reducing the yield of hydrocarbons) when controlling or removing the heat of reaction in the prior art, or the defect that the device is relatively demanding or the energy consumption is large, and provides A methanol-to-hydrocarbon method and system capable of fully utilizing the heat generated during the methanol-to-hydrocarbon reaction process without significantly increasing additional consumption while increasing the hydrocarbon yield

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  • A method and system for producing hydrocarbons from methanol
  • A method and system for producing hydrocarbons from methanol
  • A method and system for producing hydrocarbons from methanol

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Embodiment approach

[0060] According to another specific embodiment of the present invention, the heat exchange device includes a first preheater, a waste heat boiler, and a second preheater, and the heat exchange process of the heat exchange device includes: The gasified methanol-containing raw material passes through the first heat exchanger and the second heat exchanger successively, and the hydrocarbon-containing process gas generated by the reaction in the fluidized bed reactor passes through the second preheater, waste heat boiler and first preheater successively. Heater, that is, the gasified methanol-containing feedstock produced by the gasifier is heat-exchanged with the process gas from the waste heat boiler in the first preheater; The first superheated methanol-containing raw material obtained after heat exchange in the preheater and the process gas from the fluidized bed reactor are heat exchanged in the second preheater. Wherein, the second superheated methanol-containing raw materia...

Embodiment 1

[0097] This embodiment is used to illustrate the methanol-to-hydrocarbon method and system provided by the present invention

[0098] Such as figure 1 As shown, fresh methanol liquid at room temperature is sent from the methanol supply device 5 to the pipeline leading to the vaporizer 3, and the mass flow rate of the returned circulating gas is 2.5 times that of methanol. After the liquid methanol and the circulating gas are mixed in the pipeline, they enter the gasifier 3, exchange heat with the hydrocarbon-containing process gas, and then completely vaporize, and the temperature rises to 80.5°C. The vaporized gas enters the primary preheater 21 and the secondary preheater 23 respectively, and performs indirect heat exchange in spaces independent of the process gas. After the vaporized methanol-containing gas is heated twice, The temperature is raised to 280°C, and it enters from the bottom of the fluidized bed reactor 1 to flow upward and react. The reaction pressure is 0....

Embodiment 2

[0103] This embodiment is used to illustrate the methanol-to-hydrocarbon method and system provided by the present invention

[0104] use figure 1 Shown equipment and carry out methanol to hydrocarbon according to the method for embodiment 1, difference is,

[0105] (1) Methanol is mixed with the circulation gas of 1.5 times of mass flow rate;

[0106] (2) After heating twice, the methanol-containing gas is heated to 250°C;

[0107] (3) The reaction pressure is 0.6MPa, and the three-stage reaction temperatures are 400°C, 390°C, and 380°C respectively along the flow direction of methanol;

[0108] (4) The temperatures of the hydrocarbon-containing process gas after three times of cooling are 360°C, 300°C, and 130°C respectively.

[0109] Record the steam consumption, steam production and electricity consumption in the whole process, and the results are shown in Table 1.

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Abstract

The invention relates to the field of methanol hydrocarbon preparation, and discloses a method and a system for methanol hydrocarbon preparation. The method comprises the following steps of implementing in a system comprising a fluidized bed reactor, a heat exchange device and a gasifier, exchanging the heat of raw material containing liquid methanol and the heat of process gas from the heat exchange device in the gasifier, and gasifying the methanol; exchanging the heat of gasified raw material containing methanol and the heat of process gas from the heat exchange device in the gasifier, injecting the produced process gas containing hydrocarbon into the heat exchange device, and exchanging heat; removing one part of heat produced by reaction by a heat removing device in the reactor. The invention also discloses a system for implementing the method. The method has the advantages that by adopting a fluidized bed, the reaction matter is in full contact with a catalyst, the service life of the catalyst is uniform, the activity is improved, and the yield rate of hydrocarbon is improved; the heat transfer is uniform and rapid, the coefficient is large, the reaction heat can be timely removed, and the temperature in the reactor is stable and controllable; the output of steam is increased, the additional consumption of steam is not needed, and the electric consumption is decreased.

Description

technical field [0001] The invention relates to the field of methanol-to-hydrocarbon production, in particular to a methanol-to-hydrocarbon production method and a methanol-to-hydrocarbon production system. Background technique [0002] The earliest report of methanol to hydrocarbons appeared in 1880. It was proposed by LeBel and Greene that methanol was decomposed in molten zinc chloride to obtain hexamethylbenzene, light gas (mainly methane) and water. Later people tried a variety of catalysts, including silica gel, alumina, silica and so on. Zeolites are tetrahedral porous aluminosilicate crystals whose unique crystal structure provides "shape-selective catalysis" by allowing only molecules of a specific size to pass through. Zeolites ZSM-5 and ZSM-11, especially ZSM-5, have been extensively studied in methanol to hydrocarbons and are recognized as the most effective catalysts for this reaction. The conversion of methanol on ZSM-5, the reaction path currently recognized...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/20B01J8/24
CPCY02P20/52
Inventor 唐印龚元德宋国天孔德利李家栋莫玉馨刘朝慧李旭初雷林万元东张帮成
Owner SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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