Slurry bed loop reactor and application thereof

Abstract

The invention discloses a slurry bed loop reactor and application thereof. The slurry bed loop reactor comprises an ascending pipe (11) and at least one descending pipe (12) arranged inside the ascending pipe (11), wherein at least one filtering assembly (1) is arranged in the descending pipe (12); the upper part of the descending pipe (12) is provided an air bubble removing region (13) of which the pipe diameter is expanded; the two ends of the descending pipe (12) is communicated with the internal space of the ascending pipe (11) through the air bubble removing region (13) and a gap between the descending pipe and a bottom baffle plate (16) thereof; the internal space of each descending pipe is partitioned into a slurry region (2) and a filtrate region (3) through a filter medium; the slurry region (2) is connected with the two ends of the descending pipe (12); and the filtrate region (3) is communicated with a filtrate discharging hole (18). The slurry bed loop reactor provided by the invention can be further provided with a back flushing system which can be used for performing back flushing regeneration on a filter pipe under the condition of not influencing a reaction process. The reactor can be used for realizing continuous separation of gas, liquid and solid phases in a slurry bed reaction system, has a simple structure and high separation efficiency, and is easy, convenient and flexible for operating.

Description

technical field [0001] The invention relates to a gas-liquid-solid three-phase slurry bed reactor and equipment and methods for separating solid particles from liquid products, more specifically, to a slurry bed reactor capable of continuously separating liquid products from solid particles Bed loop reactor and method of application thereof. Background technique [0002] The slurry bed reactor is a commonly used gas-liquid (slurry) contact reaction equipment with a very high liquid storage capacity. For the catalytic reaction process with large reaction heat, the use of slurry bed reactor can effectively remove the reaction heat, realize the isothermal operation of the reactor, and ensure the normal operation of the reactor, so it has been widely used in today's chemical process. The slurry bed loop reactor is a high-efficiency heterogeneous reactor developed on the basis of the slurry bed bubbling reactor. In addition to all the advantages of the slurry bed bubbling react...

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Problems solved by technology

This takes up a lot of reactor space, and the solid-liquid separation unit affects the energy and mass transfer of the reaction in the main area of ​​the reactor, and the effect is not good

[0008] WO94 / 16807 discloses a method of using a filter assembly in a reactor to achieve liquid-solid separation, but once the catalyst particles block the filter assembly, the regeneration of the filter assembly is difficult, so it is not suitable for large-scale continuous production

[0009] CN1589957A discloses that a primary separation unit is set inside the reactor, a secondary separation unit is set outside the reactor to realize liquid-solid separation, and a recoil unit is set outside the reactor to realize the continuous operation of filtration. This method not only occupies The reaction space in the reactor is reduced, and the equipment structure is complicated and the operation is complicated.

This liquid-solid separation method requires the help of external power, and does not provide a detailed backwashing method, making it difficult to achieve continuous and effective separation of liquid and solid

[0012] From the above analysis, it can be seen that it is difficult to achieve continuous operation by means of filtration. Even if continuous operation is realized, it will cause serious wear of solid catalyst particles, and it will also make the equipment complicated, and the investment and operating costs will increase.

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