Micro-reactor and micro-reactor system, and method for producing low-carbon olefin from petroleum hydrocarbon

A technology of micro-reactors and low-carbon olefins, applied in chemical instruments and methods, chemical/physical/physical-chemical reactors, petroleum industry, etc., can solve problems such as uneven distribution of fluids, pressure drop differences in filled catalysts, etc., and achieve savings The effect of initial investment, reduced operating costs, and small footprint

Active Publication Date: 2020-04-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the bubble generating equipment and distribution internals of the microreactor have a greater effect on the uniformity of fluid distribution in the microchannel, for the gas-phase catalytic cracking process, the inhomogeneity of the catalyst filled in the microchannel may still lead to Differential pressure drop, resulting in uneven distribution of fluid within each reaction channel
In addition, after enlarging the microreactor, the constant temperature method of the reaction system has also become a difficult problem. How to evenly distribute the cooling or heating medium to the heat exchange layer will determine the quality of the heat exchange effect, and this technical method does not solve this problem

Method used

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  • Micro-reactor and micro-reactor system, and method for producing low-carbon olefin from petroleum hydrocarbon
  • Micro-reactor and micro-reactor system, and method for producing low-carbon olefin from petroleum hydrocarbon
  • Micro-reactor and micro-reactor system, and method for producing low-carbon olefin from petroleum hydrocarbon

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Experimental program
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Embodiment 1

[0066] The reaction condition of embodiment 1 is identical with comparative example 1. The difference with the comparative ratio is that a microreactor device is used to carry out the catalytic cracking reaction. After the reaction in the microreactor is finished, stop feeding the reaction raw materials, and switch to air to regenerate the catalyst. After regeneration, the catalytic cracking reaction is recycled.

[0067] Use as attached figure 2 The microreactor shown has one reaction layer, including four microreaction channels. The top and bottom of the reaction layer are adjacent to the heat exchange layer, the inside of the heat exchange layer is a hollow cuboid, and the height of the heat exchange space is 5 mm. Each micro-reaction channel has the same cross-sectional area, and the cross-section of the micro-channel is rectangular. Adjacent micro-reaction channels communicate with each other through branch pipes, the branch pipes are located at the center of the mic...

Embodiment 2

[0071] In embodiment 2, the same aging catalyst A as in embodiment 1 is adopted, and the reaction conditions include: the temperature is 625° C., the reactor gauge pressure is 0 MPa, and the reaction space velocity is 8 h -1 .

[0072] The adopted microreactor has 3 reaction layers, each layer includes 6 micro reaction channels. Both sides of the reaction layer are adjacent to the heat exchange layer, that is, there are 4 hollow heat exchange layers in total, and the height of the heat exchange space is 8mm. Each micro-reaction channel has the same cross-sectional area, the length of the cross-section is 12mm, and the width is 1.5mm, and the cross-section of the micro-channel is rectangular. The microchannel is 1500mm long. Adjacent micro-reaction channels communicate with each other through branch pipes, the distance between adjacent branch pipes is 750 mm, and the branch pipes have a circular cross-section with a cross-sectional radius of 0.25 mm.

[0073] Table 1.

[00...

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Abstract

The invention discloses a micro-reactor and a method for producing low-carbon olefin from petroleum hydrocarbon. The micro-reactor comprises a micro-reactor inlet (11), a gas collecting chamber (13),a collecting chamber (18), a micro-reactor outlet (12), reaction layers (101) and heat exchange layers (14), wherein the reaction layers (101) and the heat exchange layers (14) are arranged at intervals, a plurality of micro-reaction channels (19) are arranged in the reaction layers in parallel, the micro-reactor inlet (11) is sequentially communicated with the micro-reactor outlet (12) through the gas collecting chamber (13), the multiple micro-reaction channels (19) and the collecting chamber (18), the heat exchange layer (14) is a hollow cuboid, one side of the heat exchange layer (14) is communicated with a heat exchange medium inlet (15), and the other side of the heat exchange layer (14) is communicated with a heat exchange medium outlet (16). The micro-reactor provided by the invention is suitable for being used as a reactor for producing low-carbon olefin from petroleum hydrocarbon, has high heat exchange efficiency, can stably control the reaction temperature, and effectivelyimproves the conversion rate of raw materials and the selectivity of ethylene and propylene.

Description

technical field [0001] The invention relates to the field of catalytic cracking of petroleum hydrocarbons, in particular to a method for producing light olefins by catalytic cracking of petroleum hydrocarbons. Background technique [0002] As China's fuel oil standards are fully upgraded to National V and National VI standards, the industrial structure of refineries will also undergo tremendous changes. At present, the economic utilization rate of some petroleum hydrocarbons is not high. For example, C4-C6 n-paraffins are mainly used as low-value fuels. How to efficiently utilize these petroleum hydrocarbons and convert them into products with high added value is a key issue. It is one of the difficult problems to be solved to improve the economic benefits of refineries, and converting them into high value-added products propylene and ethylene through catalytic cracking is an effective method to improve economic benefits. [0003] CN102372555A discloses a method for produci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00B01J8/02C10G11/00C07C4/06C07C11/04C07C11/06
CPCB01J8/02B01J8/0285B01J19/0053B01J19/0093B01J2208/023B01J2219/00013B01J2219/00781B01J2219/00873C07C4/06C10G11/00C07C11/04C07C11/06Y02P20/52
Inventor 韩颖张翊张同旺朱丙田刘凌涛毛俊义朱振兴
Owner CHINA PETROLEUM & CHEM CORP
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