Multichannel isothermal reaction system

Abstract

The invention relates to chemical reactors, and discloses a multichannel isothermal reaction system. The system comprises a constant temperature oven with an internal temperature constant in a preset temperature range, a plurality of reaction tubes arranged inside the constant temperature oven in parallel alignment, and at least one preheating device arranged inside the constant temperature oven and communicating with the reaction tubes, wherein reactive substances is preheated to a first preset temperature by the preheating device, and the preheated substances enters the reaction tubes for reaction. The multichannel isothermal reaction system provided by the invention provides a constantly-stable temperature environment for the reaction tubes, so the reaction tubes have excellent temperature consistency.

Description

technical field [0001] The invention relates to a chemical reactor, in particular to a multi-channel isothermal reaction system. Background technique [0002] A multi-channel reactor means that the reactor contains a plurality of reaction tubes isolated from each other, and the plurality of reaction tubes are under the same temperature condition. Such a reactor is specially used for chemical reactions in which the reaction substances in each reaction tube realize heat dissipation or heat absorption under substantially isothermal conditions. The isothermal condition means that the reaction temperature of each channel is controlled within a preset reaction temperature range. [0003] At present, the multichannel reactor 1 mainly includes a plurality of preheating tubes 10 and a plurality of reaction tubes 11 respectively connected in series, such as figure 1 shown. Each preheating tube 10 and each reaction tube 11 are covered with an insulating layer 13; a plurality of preh...

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Problems solved by technology

However, when the chemical reaction carried out in each reaction tube is a strong exothermic reaction, the temperature in each reaction tube tends to rise sharply. Since the heat dissipation efficiency of the fixed insulation layer is fixed, the fixed insulation layer cannot quickly The heat released by the strong exothermic reaction; similarly, when the chemical reaction in each reaction tube is a strong endothermic reaction, the temperature in each reaction tube will often drop sharply, and the heater and the uniform heat plate cannot pass through the fixed heat preservation Layer quickly replenishes heat for each reaction tube

Therefore, when encountering a strong exothermic or strong endothermic chemical reaction, the fixed insulation layer often cannot ensure that each reaction tube is always in a better reaction temperature range, which will affect the reaction quality of the chemical reaction; and , the outside of each reaction tube is respectively covered with insulation layer, due to individual differences, the temperature inside each reaction tube will also have certain differences

[0004] In addition, when the reaction substance needs to reach a higher preheating temperature, or the reaction substance needs a phase change, the heat absorbed is very large, and the length of the preheating tube may be very long at this time, even far exceeding the length of the reaction tube

Since each preheater is connected in series with each reaction tube respectively, the height of the entire multi-channel reactor will be too high, which is not conducive to assembly and operation

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