Double-air-passage self-pressure-relief single-mode microwave reaction system

Abstract

The invention discloses a double-air-passage self-pressure-relief single-mode microwave reaction system, and belongs to the field of analytical instruments. The system comprises a single-mold cavity assembly and a single-mold sealing cover assembly, wherein an acid discharge air passage and a cooling air passage are arranged in the single-mold cavity assembly and the single-mold sealing cover assembly; the acid discharge air passage is kept in an open state during working, and acid gas generated in the pressure relief and working process of the test tube is quickly extracted; when the system is in heating and heat preservation, the cooling air channel is closed, and heat preservation of the single-die-cavity assembly and the test tube assembly is achieved; and when the system enters cooling, high-speed cooling air flow is input into the cooling air channel to cool the single-mold-cavity assembly and the test tube assembly, and rapid cooling of the single-mold-cavity assembly and the test tube assembly is achieved. According to the full-automatic microwave digestion device, the cooling function and the acid discharge function in the full-automatic microwave digestion device are separated by arranging the independent acid discharge air channel and the cooling air channel respectively, so that the problem that the temperature rise is difficult due to the fact that heat dissipation of test tubes made of ceramic or glass and the like is too fast is solved. The system and method is suitable for the field of design and manufacture of microwave digestion instruments.

Description

technical field [0001] The invention belongs to the field of analytical instruments, in particular to a microwave reaction system for chemical analysis. Background technique [0002] Microwave digestion is the main treatment method for sample pretreatment. After microwave digestion, the sample is directly loaded to AAS (Atomic Absorption Spectrometry, Atomic Absorption Spectrometry) or HPLC (High Performance Liquid Chromatography, high-efficiency liquid chromatography) and so on. [0003] With the continuous increase in the amount of sample testing and the continuous improvement of the requirements for inspection accuracy, repeatability and reliability. Microwave digestion equipment also derives various digestion principles to meet different needs. [0004] At present, there are three main types of digestion equipment: conventional multi-mode cavity digestion instrument, single-mode cavity type digestion instrument and pre-pressurized cavity type digestion instrument: [...

AI Technical Summary

Problems solved by technology

It uses PTFE test tubes and ceramic sleeves; it adopts a double-airway self-relieving pressure structure, and separates the cooling function of the system from the acid-discharging function by setting separate acid-discharging airways and cooling airways; In addition to the problems of pressure resistance, temperature resistance and anti-corrosion, the cooling and acid discharge functions are separated, which effectively solves the problem of difficult temperature rise caused by too fast heat dissipation of ceramics; on the basis of improving digestion efficiency and ensuring system reliability, it can greatly reduce Reduce the labor intensity of the operator, improve the working environment of the operator, and can be well applied to the automatic microwave digestion instrument

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