Gas-phase combustion reactor for preparing nano granule and its industrial application

A gas-phase combustion and reactor technology, which is applied in the combustion of multiple fuels, the combustion of lump fuel and liquid fuel, the combustion of lump fuel and gaseous fuel, etc. Production requirements, uneven temperature field and concentration field, nozzle easily scarred and blocked nozzle, etc., to avoid burner scarring, overcome uneven temperature field and concentration field, and reduce temperature

Active Publication Date: 2008-09-17
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of reactor has the disadvantages of uneven temperature field and concentration field, and the outlet of the nozzle is easy to scar and block the nozzle. It cannot run continuously for a long time, which limits the application and development of this type of reactor in industrial continuous production.
Therefore, it is difficult to meet the production requirements of diversified and continuous nanoparticles by using traditional diffusion flame reactors.

Method used

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  • Gas-phase combustion reactor for preparing nano granule and its industrial application
  • Gas-phase combustion reactor for preparing nano granule and its industrial application
  • Gas-phase combustion reactor for preparing nano granule and its industrial application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First add 20ml / min of TiCl 4 The evaporator is vaporized by electric heating, and the steam is mixed with the dried, purified and preheated air and hydrogen in a certain proportion in the mixer, and is ejected from the high-speed jet flame outlet to the combustion chamber at a high speed, and the outlet gas velocity is 110m / s; In addition, the purified and dried air and hydrogen are respectively passed into the combustion chamber through the auxiliary jet outlet and the auxiliary flame outlet, and ignited to form an auxiliary flame, and the outlet gas velocities are 80m / s and 30m / s respectively; Purified air is introduced to form an annular jet outside the flame to cool the reaction system. The gas velocity is 50m / s; the reaction temperature is 1000°C. Formation of nano-TiO by gas phase combustion 2 particles. The temperature of the circulating cooling water inside the combustion chamber and the burner is controlled at about 80°C. The resulting TiO 2 The primary pa...

Embodiment 2

[0029] First, 0.7g / min aluminum isopropoxide is vaporized by an electric heating evaporator, and the steam is mixed with the dried, purified, preheated air and hydrogen in a certain proportion in the mixer, and the high-speed jet flame exits to the combustion chamber. High-speed ejection, the outlet gas velocity is 140m / s; in addition, the purified and dry air and hydrogen are respectively passed into the combustion chamber through the auxiliary jet outlet and the auxiliary flame outlet, and ignited to form an auxiliary flame, and the outlet gas velocity is 100m / s respectively and 40m / s; the purified air is introduced into the cooling gas outlet to form an annular jet outside the flame to cool the reaction system, the gas velocity is 70m / s; the reaction temperature is 1200°C. Nano-Al formed by gas-phase combustion 2 o 3 particles. The temperature of the circulating cooling water inside the combustion chamber and the burner is controlled at about 80°C. Gained Al 2 o 3 The ...

Embodiment 3

[0031] First, 10ml / min of SnCl 4 and SbCl 3The ethanol solution is vaporized by an electrically heated evaporator, and the steam is mixed with the dried, purified, and preheated air and hydrogen in a certain proportion in the mixer, and is ejected from the high-speed jet flame outlet to the combustion chamber at a high speed, and the outlet gas velocity is 160m / s; In addition, the purified and dried air and hydrogen are respectively passed into the combustion chamber through the auxiliary jet outlet and the auxiliary flame outlet, and ignited to form an auxiliary flame, and the outlet gas velocities are 120m / s and 50m / s respectively; in the cooling gas Purified air is introduced into the outlet to form an annular jet outside the flame to cool the reaction system. The gas velocity is 90m / s; the reaction temperature is 1800°C. Nano ATO particles formed by gas phase combustion. The temperature of the circulating cooling water inside the combustion chamber and the burner is cont...

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Abstract

The invention discloses a gas phase combustion reactor for preparing nanometer particles and the industrial application method. By changing the nozzle structure of the reactor in the prior art, the reactor enables the reaction material and the combustion gas to be evenly mixed to form ultrahigh speed jet flame, overcomes the defects of uneven temperature field and concentration field and liability to scab of nozzle, and enables continuous production for long period. The gas phase combustion reactor can be used for industrial and continuous preparation of various oxide nanometer particles such as nanometer titanium dioxide, silicon dioxide, aluminum oxide, and antimony doped tin dioxide.

Description

technical field [0001] The invention relates to a gas phase combustion reactor and its industrial application, in particular to a reactor for continuous preparation of nanometer oxide particles. Background technique [0002] The production process of preparing nanoparticles by gas-phase combustion method was first successfully developed by German Degussa company in the 1940s. Compared with traditional liquid-phase preparation methods, such as sol-gel method, co-precipitation method, hydrothermal method, Microemulsion method, etc., has the advantages of simple equipment, fixed, no follow-up process, etc. After decades of development, the production process has been gradually improved and is widely used in carbon black, SiO 2 、TiO 2 、Al 2 o 3 , SnO 2 , Fe 2 o 3 , ZrO 2 and other single oxide products, and gradually extended to SiO 2 / TiO 2 , ITO, ATO, V 2 o 5 / TiO 2 and other composite oxides and some non-oxide (TiN, TiB, SiC, etc.) products. The annual productio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/24F23C5/00F23C3/00
Inventor 胡彦杰刘杰李春忠
Owner EAST CHINA UNIV OF SCI & TECH
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