Work-starting method of apparatus for producing low carbon alkene from methanol

A technology of low-carbon olefins and methanol, which is applied in the field of start-up of methanol-to-low-carbon olefins units, and achieves the effect of fast heating speed

Active Publication Date: 2014-02-19
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

During the start-up, the refinery unit can use the regenerator to inject fuel oil to provide heat, but the MTO unit cannot use this method, so the source of heat has become a big problem

Method used

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  • Work-starting method of apparatus for producing low carbon alkene from methanol

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Embodiment 1

[0138] The hot nitrogen from the heating furnace and the hot air from the auxiliary combustion chamber heat the reactor to 400°C and the regenerator to 550°C respectively according to a certain temperature rise curve. The heating rate is 15°C / h. After the temperature rise of the two vessels is completed, the regenerator starts to add catalyst, and then the reactor is filled with catalyst, and the total amount of catalyst is finally added to the required amount through the fluidization of the two vessels. The catalysts in the two vessels are heated to 370°C and 420°C respectively. Crude methanol with a water content of 4.5% passes through the methanol vaporizer and enters the start-up heating furnace to be preheated to 300°C and enters the reactor. At this time, adjust the operation. When the reactor temperature is higher than 400°C, the fluidization of the reactor and the regenerator will start and gradually stabilize. operate. The product gas generated by the reactor enters ...

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Abstract

The invention relates to a work-starting method of an apparatus for producing low carbon alkene from methanol. The method comprises: (a) heating a reactor (4) to a first preset temperature T1 and heating a reactivator (5) to a second preset temperature T2 in advance; (b) adding a catalyst (18) into the reactor (4) and the reactivator (5), adjusting the temperature of the reactor (4) to a third preset temperature T3 and adjusting the temperature of the reactivator (5) to a forth preset temperature T4; (c) enabling methanol heated to a preheating temperature TP to enter the reactor (4), when the reactor temperature reaches a fifth preset temperature T5, starting fluidization in the reactor (4) and the reactivator (5); (d) adjusting reaction system heat to timely balance operation and further to enable various reaction parameters to reach requirements; and (e) making the apparatus work normally, wherein the reactor (4) and the reactivator (5) respectively employs respective heat sources and heating mediums for heating in the step (a) and/or the step (b). The method is efficient, rapid and stable.

Description

technical field [0001] The invention relates to a start-up method of a methanol-to-low-carbon olefins device. Background technique [0002] With the sustained and rapid economic development, the consumption of chemicals produced with ethylene and propylene as basic raw materials has been increasing year by year. For example, China’s ethylene and propylene have been in short supply for a long time, and the imports of chemicals produced using ethylene and propylene remain high. Almost all ethylene and propylene in the world are produced using light hydrocarbons, condensate oil, and naphtha as raw materials. Since China’s dependence on foreign oil has exceeded 50%, non-petroleum routes are used to produce methanol, and then methanol is converted through catalytic conversion. It is of great significance to produce light olefins such as ethylene and propylene. [0003] In today's petrochemical industry, ethylene is almost all obtained through steam cracking of petrochemical raw ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/04C07C11/06C07C1/20
CPCY02P20/52Y02P20/584Y02P30/20Y02P30/40
Inventor 武兴彬闫国春关丰忠夏季闫辉王志军王云池纪贵臣孙保全赵永辉
Owner CHNA ENERGY INVESTMENT CORP LTD
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