Riser catalytic cracking device
A catalytic cracking device and riser technology, applied in the direction of catalytic cracking, cracking, chemical instruments and methods, etc., can solve the problems of high yield of dry gas and coke, achieve increased yield, shorten material residence time, and inhibit alkylation and the effect of the hydrogen transfer reaction
Inactive Publication Date: 2020-04-07
PETROCHINA CO LTD
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Embodiment 1
[0100] Example 1: In order to investigate the comprehensive product distribution of the catalytic cracking device of the present invention, the following experiments were carried out: according to the conventional preparation method for preparing semi-synthetic catalyst, according to 35% molecular sieve, 20% alumina, 8% alumina sol binder FCC catalyst was prepared with a catalyst formulation of 37% kaolin. The evaluation was carried out under the following conditions: the raw material oil was Xinjiang crude oil (the properties of the raw material are shown in Table 1), the agent-oil ratio was 6, and the reaction temperature was 500°C. The evaluation results are shown in Table 2.
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The invention provides a riser catalytic cracking device. The riser catalytic cracking device comprises: a riser reactor, wherein the inlet end of the riser reactor is communicated with an atomizing nozzle, and the outlet end of the riser reactor is communicated with a stripper; a catalyst regenerator, which comprises a catalyst inlet and a catalyst outlet, wherein the catalyst inlet is communicated with the stripper, and the catalyst outlet is communicated with the riser reactor. The riser reactor sequentially comprises a first reaction zone and a second reaction zone from the inlet end to the outlet end, wherein the inlet end of the first reaction zone is communicated with the atomizing nozzle; the outlet end of the first reaction zone is communicated with the second reaction zone; a non-reducing structure and a reducing structure are sequentially arranged from the inlet end to the outlet end of the first reaction zone; the reducing structure sequentially comprises a hole expanding structure, an isodiametric structure and a hole shrinkage structure in the direction from the inlet end of the first reaction zone to the outlet end of the first reaction zone; and the catalyst outletis communicated with the reducing structure of the first reaction zone of the riser reactor.
Description
technical field [0001] The invention belongs to the field of catalytic cracking, and relates to a catalytic cracking device for a riser. Background technique [0002] Low-carbon olefins, mainly ethylene, propylene, and butene, are important basic organic chemical raw materials, which are widely used. IHS Chemical expects that the global demand for major basic chemicals ethylene and propylene will grow rapidly. Among them, propylene demand will increase by 48 million tons per year, with an average annual growth rate of 4.2%. Thanks to strong demand for propylene derivatives in emerging markets such as Asia, US consultancy Nexant predicts that global propylene demand will increase to 132 million tons by 2025. Propylene is the second largest organic raw material in the petrochemical industry. In 2016, the total domestic demand for propylene is expected to be 27.61 million tons, and the equivalent consumption will reach 33.68 million tons (considering the demand for propylene ...
Claims
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IPC IPC(8): B01J8/38C10G11/05C10G11/18B01J8/24
CPCB01J8/388B01J8/245C10G11/05C10G11/182C10G11/18
Inventor 柳召永张忠东王艳飞石晓庆王辰晨刘明霞苏怡高雄厚樊红超翟佳宁孙志国杜晓辉刘超伟
Owner PETROCHINA CO LTD