High temperature and high pressure microwave chemical reactor

Abstract

The invention discloses a high-temperature and high-pressure microwave chemical reactor which comprises a pressure-bearing shell with an inner cavity structure, a stirring system arranged on the top of the pressure-bearing shell and a microwave feeder arranged on the side wall of the pressure-bearing shell, wherein the stirring system mainly comprises a motor, a speed reducer, a bearing and a stirrer; the motor is in power connection with the speed reducer; the stirrer is in power connection to a power output shaft of the speed reducer; the bearing is arranged on the top of the stirrer; the lower part of the stirrer is arranged in the inner cavity of the pressure-bearing shell; a material inlet / outlet is formed in the top of the pressure-bearing shell; a liquid drainage opening is formed in the bottom of the pressure-bearing shell. The high-temperature and high-pressure microwave chemical reactor disclosed by the invention is provided with a plurality of layers of microwave feeding devices, and a plurality of transverse or vertical microwave feeding devices are arranged at each layer, so that multiple microwave feeding openings are formed; furthermore, the stirrer is arranged in the reactor, mediums in the overall reactor are subjected to uniform microwave radiation and can generate full chemical reaction. The high-temperature and high-pressure microwave chemical reactor is high in microwave utilization rate, and the microwave power is high after microwaves are fed.

Description

technical field [0001] The invention relates to a chemical device which utilizes microwave energy technology to promote chemical reaction, in particular to a microwave chemical reaction device capable of withstanding high temperature and high pressure. Background technique [0002] In 1967, N.H.Williams reported the use of microwave radiation to speed up chemical reactions, and people began to pay attention to the use of microwaves to speed up and control chemical reactions. Studies have shown that most synthetic chemical reactions require external heating (heating). The traditional heating methods are steam heating, oil heating and electric heating. These heating methods are all external heating of molecules, and there are uneven temperature fields and heating aging delays. and other shortcomings. Microwave heating not only overcomes the shortcomings of uneven temperature field and heating aging lag, but also interacts and couples with electrons in molecules during heating...

AI Technical Summary

Problems solved by technology

Limited by structure and materials, this microwave chemical reaction equipment has a small container (the volume of a single container does not exceed 100mL), low microwave power (usually not more than 1kW), and low working temperature and pressure

This type of microwave reactor can only be used for small experiments, and cannot be used for pilot and industrial production.

Moreover, existing microwave reactors can only be applied to reactions in non-metallic containers at normal temperature and pressure, and most organic synthesis requires high temperature or high pressure or the coexistence of both to carry out better.

[0006] The traditional chemical reactor has the following defects in the microwave feeding structure and method: 1. The traditional microwave feeding structure is only a microwave access channel, and its microwave access channel is inferior to the airtight structure of the high temperature and high pressure microwave chemical reactor , When microwave energy enters the inner cavity of the high-temperature and high-pressure microwave chemical reactor, a large amount of microwave energy will often be lost, making the utilization rate of microwave energy poor; 2. When microwave enters the high-temperature and high-pressure microwave chemical reactor, the microwave field cannot be uniform 3. After the microwave enters the high-temperature and high-pressure microwave chemical reactor through the feeding device, interference occurs, which greatly reduces the effective utilization rate of microwave energy.

4. Due to the shielding effect of metal, it is difficult to realize the feeding of microwaves in airtight pressure vessels that withstand high temperature and high pressure and are made of metal materials.

5. It is difficult to guarantee the ability of high temperature and high pressure resistance and the sealing performance of process medium and microwave

6. The metal pressure vessel that withstands high temperature and high pressure is itself a special equipment, and the safety and reliability of microwave feeding cannot be guaranteed

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