Design, construction and debugging of efficient and controllable online microwave reaction system

A microwave reaction system and microwave reaction technology, applied in the preparation of test samples, measuring devices, instruments, etc., can solve the problems of wide distribution of product composition, inability to accurately reflect the microwave cracking reaction characteristics of biomass, and complexity. Achieve simple structure, improve work efficiency and flexibility, and be easy to implement

Pending Publication Date: 2022-03-18
CHINA UNIV OF PETROLEUM (BEIJING) +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, due to the complex reaction mechanism of biomass samples in the microwave pyrolysis reaction process, and the wide and complex distribution of product composition, and as the reaction progresses, the product composition also changes. The means of dynamic measurement and analysis of the microwave reaction of the relevant indicators of the material sample cannot accurately reflect the characteristics of the microwave cracking reaction of the biomass.

Method used

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  • Design, construction and debugging of efficient and controllable online microwave reaction system
  • Design, construction and debugging of efficient and controllable online microwave reaction system
  • Design, construction and debugging of efficient and controllable online microwave reaction system

Examples

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Effect test

Embodiment 1

[0046] An efficient and controllable online microwave reaction system, such as figure 1 As shown, it includes a microwave reaction unit, a double gas circuit unit and a gas chromatographic analysis unit connected in sequence;

[0047] The dual gas circuit unit includes a parallel full-line heating gas circuit and a cold trap liquefied gas circuit;

[0048] The microwave reaction unit is connected to the whole heating gas circuit and the cold trap liquefied gas circuit through a first pipeline with a diverting valve;

[0049] The gas chromatographic analysis unit is connected with the whole heating gas circuit and the cold trap liquefied gas circuit through a second pipeline with a steering valve.

[0050] The microwave reaction unit: as figure 2 As shown, it includes a chamber 1, a microwave generator 4, a shielding device and a PLC intelligent control system; the chamber is equipped with a temperature detection device, an input power monitoring device, and a reflected powe...

Embodiment 2

[0059] Taking microwave pyrolysis of carbonaceous materials as an example, using the microwave reaction system described in Example 1 to carry out pyrolysis treatment, and analyzing the products generated by the reaction, the steps are as follows:

[0060] According to the requirements, microwave-assisted pyrolysis of carbonaceous materials is carried out after controlling the microwave power and reaction temperature;

[0061] At any time during the reaction, real-time chromatographic online analysis of the generated products can be performed, and the full-line heating circuit and cold trap circuit can be switched at any time to conduct transient analysis of all components of products with different boiling points (C1-C5 and above C6 components) and transient analysis of low boiling point products (C1-C5).

[0062] During the reaction process, turn the valve to the full-line heating gas path, heat the product to maintain the gas state and enter the chromatogram for full compon...

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Abstract

The invention relates to the technical field of multifunctional microwave reaction systems, in particular to a microwave reaction system capable of performing all-component online analysis and gas-liquid separation online analysis on reaction products. The microwave reaction system provided by the invention comprises a microwave reaction unit, a double-gas-path unit and a gas chromatographic analysis unit which are connected in sequence, the double-gas-path unit comprises a full-line heating gas path and a cold trap liquefied gas path which are connected in parallel; the microwave reaction unit is connected with the whole-line heating gas path and the cold trap liquefied gas path through a first pipeline with a conversion valve; and the gas chromatographic analysis unit is connected with the whole-line heating gas path and the cold trap liquefied gas path through a second pipeline with a conversion valve. According to the microwave reaction system, transient analysis of all components of products with different boiling points and transient analysis of products with low boiling points can be realized, so that the accuracy of product analysis is improved, the working efficiency and flexibility of the microwave reaction system are greatly improved, and the use requirements of multiple application fields are met.

Description

technical field [0001] The invention relates to the technical field of multifunctional microwave reaction systems, in particular to a microwave reaction system capable of performing online analysis of all components and gas-liquid separation of reaction products. Background technique [0002] Microwave heating has the advantages of uniform heating, high efficiency, selective heating, easy control, fast response, and less side reactions. It was widely used in household microwave ovens from 1970 to 1980, and was applied to material processing and microwave chemistry in 1990. Reactions, including mineral processing, reduction of metal oxides, leaching, sintering and fabrication of ceramic materials, etc. [0003] In addition, in recent years, the rapid development of microwave-assisted pyrolysis technology has made microwave heating play an increasingly important role in the treatment of waste plastics, rubber waste, sewage sludge, biomass, and polluted soil. [0004] Compared...

Claims

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Application Information

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IPC IPC(8): G01N1/44G01N30/06G01N30/68
CPCG01N1/44G01N30/06G01N30/68
Inventor 刘博男赵俊马望京
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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