In-situ detection device and detection method for heat conversion reaction process of solid fuel

A solid fuel, in-situ detection technology, applied in the direction of measuring devices, material analysis, material analysis by electromagnetic means, etc., can solve the problem that the rapid pyrolysis process is difficult to effectively simulate, lacks real-time detection methods for solid fuel, and cannot continuously analyze process products And other issues

Inactive Publication Date: 2012-02-22
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

First of all, both methods are continuous post-analysis modes after the product is continuously transported to the analysis unit, rather than a real in-situ on-line analysis process, and it is difficult to provide sufficient real-time detection information for the rapidly changing pyrolysis process; The heating rate (usually lower than 500°C/min) under heavy pyrolysis conditions is much lower than the actual situation of fast pyrolysis process, so it is difficult to effectively simulate the fast pyrolysis process
In order to realize the simulation of the rapid thermal conversion process of solid fuels, the experimental analysis techniques of "hot filament pyrolysis" and "Curie point pyrolysis" combined with "gas-mass spectrometer" have received extensive attention in recent years. The pyrolysis method can simulate the pyrolysis process above 3000°C/min, but the product analysis method combined with the "gas-mass spectrometer" can only realize

Method used

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  • In-situ detection device and detection method for heat conversion reaction process of solid fuel
  • In-situ detection device and detection method for heat conversion reaction process of solid fuel
  • In-situ detection device and detection method for heat conversion reaction process of solid fuel

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Effect test

Embodiment 1

[0044] The Huolinhe coal is crushed and dried into pulverized coal with a diameter of less than 0.5mm. After drying at 120°C, 50 mg of the pulverized coal sample is placed on a metal platinum sheet, and the micro thermal conversion reactor is closed; quadrupole-time-of-flight mass spectrometry analysis The instrument (MicroTOF-QII, Bruker, Germany) is turned on and in a stable state, and is analyzed in full scan mode. The mass spectrometer can complete 20 full scans per second, and the mass spectrum mass range is set here to be 50-2000; the He carrier gas is turned on And set the carrier gas flow rate to 10L / min, do not open the split port; turn on the independent ion source (Dart-SVP, American Ironsense Company); after 30 minutes of stabilization, turn on the high-speed camera (VW-6000, Japan Keyence Company) and adjust the focus to The clearest picture; heat the metal platinum sheet with electricity, set the heating rate at 6000°C / min, heat it up to 800°C and keep it warm for...

Embodiment 2

[0046] The straw is crushed and dried into a powder with a diameter of less than 1mm, and after being heated to 120°C for drying, 40 mg of the powder sample is placed in a quartz boat wrapped around a platinum wire, and the micro thermal conversion reactor is closed; the quadrupole-time-of-flight mass spectrometer (MicroTOF-QII, Bruker, Germany) is turned on and in a stable state, and is analyzed in full scan mode. The mass spectrometer can complete 20 full scans per second. Here, the mass spectrometer mass range is set to 50-1500; the He carrier gas is turned on and set The carrier gas flow rate is 20L / min, and the split flow rate is 5L / min; turn on the independent ion source (Dart-SVP, Ironsense, USA); after 30 minutes of stabilization, turn on the high-speed camera (VW-6000, Keyence, Japan) and adjust the focus to the clearest image ; Turn on the electricity to heat the platinum wire, set the heating rate to 30°C / min, and raise the temperature to 800°C. The high-temperature ...

Embodiment 3

[0048] Cut waste plastic bags into 2-5mm pieces 2 Take 5 mg of the sample and place it on a metal platinum sheet, and close the miniature thermal conversion reactor; the quadrupole-time-of-flight mass spectrometer (MicroTOF-QII, Bruker, Germany) is in a power-on and stable state, and is analyzed in full-scan mode , the mass spectrometer can complete 20 full scans per second, here set the mass spectrometer mass range 50-2500; turn on the N2 carrier gas and set the carrier gas flow rate to 30L / min, the split flow rate to 25L / min; turn on the independent ion source (Dart-SVP , Ironsense, USA); after stabilizing for 30 minutes, turn on the high-speed camera (VW-6000, Keyence Company, Japan) and adjust the focus to the clearest picture; turn on the electricity to heat the metal platinum sheet, set the heating rate to 300°C / min, and raise the temperature to 1000°C. The high-temperature gas phase components obtained by pyrolysis enter the mass spectrometer under the carrier gas for r...

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Abstract

The invention relates to an in-situ detection device and an in-situ detection method for the heat conversion reaction process of a solid fuel. The detection method comprises the following steps of: putting the solid fuel into a miniature heat conversion reactor; heating the solid fuel by energizing metal, so that the solid fuel is subjected to a heat conversion reaction to generate a high-temperature gaseous product; ionizing the high-temperature gaseous product under the action of an ion source; putting the ionized high-temperature gaseous product into a mass spectrum analyzer at the other end of the miniature heat conversion reactor; and analyzing ingredients of the high-temperature gaseous product in real time, and monitoring the form variation of the solid fuel in real time by using a high-speed camera erected on the top or the lateral surface of the miniature reactor to complete multidirectional in-situ analysis on the solid fuel in the heat conversion process. The in-situ detection device and the in-situ detection method have the advantages that: quick pyrogenic decomposition can be realized, quickly-pyrolytic volatile ingredients can be analyzed in real time, and the real-time change of the form of the solid fuel can be monitored in real time.

Description

technical field [0001] The invention relates to an in-situ detection method for a solid fuel thermal conversion reaction process, which belongs to the field of energy. Background technique [0002] my country is a country rich in coal, low in gas, and poor in oil. Coal is an important pillar of my country's economic development. Therefore, the development of clean and comprehensive utilization methods for coal is an inevitable requirement for my country's energy structure and industrial development. Coal rapid pyrolysis technology is an effective method to obtain high-yield tar and high-calorific-value pyrolysis gas, and can realize the polygeneration of heat, electricity, oil and gas through coupling with circulating fluidized bed technology. An important subject of comprehensive utilization research. In recent years, the research on the thermal conversion of biomass solid fuel as a renewable energy and resource has become another hot topic in the field of energy conversio...

Claims

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Application Information

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IPC IPC(8): G01N27/62G01N27/626
Inventor 王泽宋文立林伟刚李松庚姚建中都林郝丽芳
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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