An external loop reactor with simultaneous reaction, heat exchange and separation functions

Abstract

The invention relates to an external circulation reactor having functions of reaction, heat exchange and separation. The external circulation reactor comprises a main reactor, a solid feeding port, a liquid inlet, a gas-liquid integration distributor, a gas inlet, a gas outlet, an upper portion downcomer, a liquid outlet, an auxiliary separating tank, a hydrocyclone, a heat exchanger and a lower portion downcomer. Feed liquid after reaction enters the auxiliary separating tank through the upper portion downcomer, and the hydrocyclone is placed at the middle position of the auxiliary separating tank; by utilizing liquid rotational flow characteristics and separation effects of the hydrocyclone, a clean product flows out of the liquid outlet, solid-containing grout returns to the reactor through the lower portion downcomer to continue to participate in the reaction, and a good heat exchange performance of the external circulation reactor is reserved. The external circulation reactor is simple in structure and low in cost, the separation function of the reactor is added, gas-liquid-solid three-phase mixing, strong exothermic reaction and separation are coupled, process intensification is performed, and the external circulation reactor is particularly suitable for gas-liquid-solid three-phase reaction where a catalyst is solid particles and much heat is released.

Description

technical field [0001] The invention relates to an external loop reactor with the functions of reaction, heat exchange and separation, belonging to the field of process intensification, in particular to a gas-liquid-solid three-phase reaction and separation process in which the catalyst is solid particles and highly exothermic. Background technique [0002] The outer loop reactor is a reactor developed on the basis of the bubble column in the past 40 to 50 years, and the industrialization of the outer loop reactor was realized in foreign countries in the early 1970s. The loop reactor has the excellent characteristics of large volume mass transfer coefficient, simple structure, no transmission parts, low cost, and low energy consumption. It is widely used in chemical, biochemical, and environmental engineering fields. Compared with the inner loop reactor, it benefits from the outer loop The external downcomer of the flow reactor has better heat transfer performance, and is es...

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Problems solved by technology

Both filtration and sedimentation separation are commonly used separation methods. Filtration separation usually requires pressurization, otherwise normal pressure filtration will consume huge time costs, and the filter medium is very important to the efficiency and effect of filtration. If a suitable filter medium cannot be found, the effect Otherwise, it cannot be guaranteed. Filtration will easily lead to blockage of the filter medium, which needs to be replaced frequently. Frequent replacement of the filter medium will also affect the normal operation of the reactor.

Gravity settling is a simple and traditional liquid-solid separation method, which is simple and practical, but it is difficult to ensure the separation efficiency of small particles only by gravity. Therefore, gravity settling equipment is generally large and requires a large area or space. It is suitable for Separation of larger particles

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