Honeycomb ceramic pulse protective agent

Abstract

The invention discloses a honeycomb ceramic pulse protective agent, which comprises the following components in percentage: 50-60 % of alumina trioxide powder, 30-40 % of silicon oxide powder, 3-6 % of magnesium oxide and 3-5% of kaolinite. The honeycomb ceramic pulse protective agent is internally provided with special net shaped honeycomb holes (2), and is provided with a bent or curved throughhole (1), because a reactant can generate a pulse phenomenon on the interface between a protective agent and a catalyst, and the pulse action can quicken the continuous flowing of oil in the catalyst, the catalytic reaction speed is improved, the catalyst can be ensure not to produce carbon sedimentation and coking too early, further, the service life of the catalyst is prolonged, the pressure drop of a reactor is reduced, the production operating cycle of a fixed bed reactor is improved, the production work efficiency is improved, the oil refining processing cost is reduced, and the economicbenefits of enterprises are increased.

Description

technical field [0001] The invention relates to a catalytic support and protection agent used in fixed-bed reactors in petrochemical, environmental protection and other industries. Background technique [0002] As we all know, fixed bed reactor is an important equipment and device in oil refining, petrochemical, chemical, environmental protection and metallurgy industries. It is mainly used for catalytic reactions in the tower, such as ammonia synthesis tower, sulfur dioxide contact oxidizer, hydrocarbon steam reformer and oil refining Catalytic reforming, hydrodesulfurization, hydrocracking and refining in China, as well as fixed bed reactors such as ethylene oxidation and ethylbenzene dehydrogenation. In addition, it can also be used for non-catalytic natural gas conversion, water gas production and industrial wastewater treatment. According to the comprehensive technical requirements of catalytic reaction temperature distribution, pressure drop, gas-liquid properties, ...

AI Technical Summary

Problems solved by technology

Although ceramic balls have the characteristics of high strength and good acid and alkali resistance, they have the following disadvantages: First, due to the limitation of the structure of the ceramic ball itself, the porosity is low and the specific surface area is small, resulting in an excessive pressure drop in the fixed bed reactor. , increase the flow resistance of the reactants, reduce the frequency of effective contact of the reactants, thus affecting the catalytic reaction efficiency of the fixed bed reactor; second, although the porosity of the ceramic ring is high, the pore size between the particles of the ceramic ring is too large and the distribution is uneven , so that it reduces the ability to intercept impurities, and there are many restrictions on supporting small-scale catalysts, which affects the treatment effect, shortens the life cycle of the fixed-bed reactor, and increases the operating cost

However, as crude oil becomes heavier, its quality deteriorates, and the deep utilization and development of crude oil, the impurity content of heavy oil crude oil is high. In the catalytic reaction of fixed bed reactor in oil refining, the existing honeycomb ceramic protective agent still has the following shortcomings: 1. Because the general honeycomb ceramics are inert and the compressive strength and wear resistance are not high, the active adsorption capacity of the honeycomb ceramics is not strong; the second is that due to the increase of crude oil impurities, the impurities are easy to deposit on the interface between the catalyst and the protective agent in the reactor , the reaction phase cannot form a good catalytic reaction on the interface, which reduces the ability of the catalyst to absorb impurities, which not only causes the blockage of the oil and gas channels in the reactor, but also increases the pressure drop in the reactor, and may also cause the catalyst to precipitate carbon and coke too quickly , thereby shortening the service life of the catalyst, which not only affects the normal operation period of the fixed bed reactor, but also increases the consumption of the catalyst, reduces the refining output, increases the refining processing cost, and reduces the economic benefit

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