Collision type supersonic airflow accelerated low-heat solid-phase circulation reaction device

Abstract

The invention discloses a collision type supersonic airflow accelerated low-heat solid-phase circulation reaction device. The device comprises a collision type reactor; a gas source control system used for providing a gas source and connected with the collision type reactor through a pipeline; and a material conveying system used for conveying and sampling materials and connected with the collision type reactor through a pipeline. According to the collision type supersonic airflow accelerated low-heat solid-phase circulation reaction device, a mode of coaxial feeding at the center of a supersonic airflow generated by a supersonic spray pipe is adopted; strong ejection of the supersonic airflow is utilized; particles can be smoothly fed into a flow field; the movement speed of the solid-phase particles is limited to the axial direction; kinetic energy and collision probability of reactor particles are greatly improved, conversion from mechanical energy to chemical energy is increased, more favorable conditions can be created for solid-phase reaction, the utilization rate of the kinetic energy of the particles is high, a catalyst is not needed, impurities are not introduced, pollution in the reaction process is avoided, and meanwhile, the energy feed-in density is high, the synthesis efficiency is high and the yield is high.

Description

technical field [0001] The invention belongs to a low-heat solid-phase circulation reaction synthesis device, in particular to a low-heat solid-phase circulation reaction device accelerated by a colliding supersonic air flow. Background technique [0002] "Green" is the necessary condition for sustainable development and the embodiment of people's pursuit of a better life. The green development of the environment and resources is inseparable from green chemistry. Green chemistry, also known as pollution-free chemistry, includes the use of harmless renewable raw materials, green solvents, green catalysts, green chemicals, green products, etc. Among them, low-heat solid-state reaction synthesis is an important part of the rapidly developing field of green chemical material synthesis in recent years. [0003] The essence of low-heat solid-state reaction is energy transfer, that is, the effective conversion of mechanical energy into the chemical energy of the reaction system, s...

AI Technical Summary

Problems solved by technology

It is characterized by using grinding balls as the energy feeding medium, and the general ball-to-material ratio is 30:1. The resulting problems are: there are inevitably a large number of invalid impacts in the synthesis process, and the energy feeding density is low and the efficiency is low; The instantaneous temperature rise will easily cause the powder to agglomerate, so the reaction synthesis rate is also low; in addition, a large amount of impurities are introduced during the grinding process

[0004] Compared with traditional mechanochemical devices such as jet mills and fluidized beds using aerodynamic technology, compared with planetary mills, ball mills and other ball-medium mechanochemical devices, although they have no pollution, high precision, heat resistance, good powder shape, and environmental protection friendliness and other advantages, but due to inherent defects, swirl and fluidized bed jet mills, it is difficult to achieve supersonic airflow in the swirl flow field, even if the Laval nozzle is used, due to the complex shock wave system in the collision chamber, It is also difficult to maintain supersonic airflow, and supersonic collision cannot be realized; and because particles are added to the airflow from the wall and dispersed in the swirling flow, the volume concentration of particles is relatively low, and their trajectory is highly dispersed, so the collision probability is also difficult to predict, and it is even more difficult to achieve chemical reactions

At present, it is only used to achieve ultrafine pulverization and surface modification of materials, and it is difficult to be used for low-heat solid-phase chemical reaction synthesis at room temperature.

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