scholarly journals Combustion of Low-Concentration Gas in a Porous Media Burner: Reactor Design and Optimization

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Jinhua Chen ◽  
Guangcai Wen ◽  
Yanqing Li ◽  
Xiangyun Lan ◽  
Song Yan ◽  
...  
Keyword(s):  
High Temperature ◽  
Heat Storage ◽  
Pressure Differential ◽  
Maximum Pressure ◽  
Temperature Oxidation ◽  
Low Concentration ◽  
Design And Optimization ◽  
Instantaneous Pressure ◽  
Heating Mode ◽  
Oxidation System

In order to utilize the low-concentration gas directly discharged into the atmosphere from 1.1% to 1.50% in coal mine production, the heat storage and oxidation equipment of gas was improved, and the heat storage and safety of gas under high-temperature environment were tested. The experimental results show that the regenerative oxidation system could provide a high-temperature oxidation environment of 1000°C for gas oxidation after changing the heating mode and enhancing the sealing property. The pressure curves of air and gas in the burner were similar. With the increase of gas concentration, the pressure difference between inlet and outlet tended to increase linearly with a minimum pressure differential of 4 kPa (air) and a maximum pressure differential of 11 kPa (1.50% gas). The internal pressure was relatively stable without an instantaneous pressure surge or explosion. The result of this study provides a reference for further research on the low-concentration gas regeneration oxidation unit at high temperatures.

scholarly journals Oxidation and Characterization of Low Concentration Gas in High-Temperature Reactor

2020 ◽  
Author(s):  
Jinhua Chen ◽  
Guangcai Wen ◽  
Song Yan ◽  
Xiangyun Lan ◽  
Lu Xiao
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Air Pressure ◽  
Oxidation Products ◽  
Heating Process ◽  
Temperature Oxidation ◽  
Low Concentration ◽  
Temperature Environment ◽  
Explosion Limit ◽  
High Temperature Environment

To achieve efficient utilization of low-concentration mine gas, reduce resource waste, and alleviate environmental pollution, high-temperature oxidation of low-concentration gas at a concentration range of 1.00% to 1.50% that is directly discharged into the atmosphere during coal mine production was oxidized to recover heat for reuse. The gas oxidation equipment was improved for the heating process, and the safety of low-concentration gas oxidation under high-temperature environment was evaluated. Experimental results showed that the reactor could provide a 1000 ℃ high-temperature oxidation environment for gas oxidation after installing high-temperature resistant ceramics. The pressure variation curves of the reactor with air and different concentrations of gas were similar. Due to the thermal expansion, the air pressure slightly increased and then returned to normal pressure. In contrast, the low-concentration gas exhibited a stable pressure response in the high-temperature environment of 1000 ℃. The outlet pressure was significantly greater than the inlet pressure, and the pressure difference between the inlet and outlet exhibited a trend to increase with the gas concentration. The explosion limit varied with the temperature and the blend with oxidation products. The ratio of measured gas pressure to air pressure after oxidation was below the explosion criterion, indicating that the measured concentration gas is still safe after the shift of explosion limit, which provides a safe concentration range for efficient use of low-concentration gas in the future.

scholarly journals Oxidation and Characterization of Low-Concentration Gas in a High-Temperature Reactor

Processes ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 481
Author(s):  
Jinhua Chen ◽  
Guangcai Wen ◽  
Song Yan ◽  
Xiangyun Lan ◽  
Lu Xiao
Keyword(s):  
High Temperature ◽  
Pressure Difference ◽  
High Temperature Oxidation ◽  
Air Pressure ◽  
Oxidation Products ◽  
Temperature Oxidation ◽  
Low Concentration ◽  
Temperature Environment ◽  
Explosion Limit ◽  
High Temperature Environment

To achieve the efficient utilization of low-concentration mine gas, reduce resource waste and alleviate environmental pollution, the high-temperature oxidation of low-concentration gas at a concentration range of 1.00% to 1.50%, which is directly discharged into the atmosphere during coal mine production, was carried out to recover heat for reuse. The gas oxidation equipment was improved for the heating process and the safety of low-concentration gas oxidation under a high-temperature environment was evaluated. The experimental results showed that the reactor could provide a 1000 °C high-temperature oxidation environment for gas oxidation after installing high-temperature resistant ceramics. The pressure variation curves of the reactor with air and different concentrations of gas were similar. Due to the thermal expansion, the air pressure slightly increased and then returned to normal pressure. In contrast, the low-concentration gas exhibited a stable pressure response in the high-temperature environment of 1000 °C. The outlet pressure was significantly greater than the inlet pressure, and the pressure difference between the inlet and outlet exhibited a trend to increase with the gas concentration. The minimum pressure difference was 4 kPa (air) and the maximum was 11 kPa (1.50% gas). The explosion limit varied with the temperature and the blend of oxidation products. The ratio of measured gas pressure to air pressure after oxidation was below the explosion criterion, indicating that the measured concentration of gas is still safe after the shift of the explosion limit, which provides a safe concentration range for the efficient use of low-concentration gas in the future.

Design and optimization of a high-temperature latent heat storage unit

2020 ◽  
Vol 261 ◽  
pp. 114330 ◽  
Author(s):  
Ehsan Rezaei ◽  
Maurizio Barbato ◽  
Alberto Ortona ◽  
Sophia Haussener
Keyword(s):  
High Temperature ◽  
Latent Heat ◽  
Heat Storage ◽  
Storage Unit ◽  
Latent Heat Storage ◽  
Design And Optimization

Behaviour of copper during the high temperature oxidation of steels produced by the electric furnace route

2003 ◽  
Vol 100 (1) ◽  
pp. 73-82
Author(s):  
Y. Riquier ◽  
D. Lassance ◽  
I. Li ◽  
J. M. Detry ◽  
A. Hildenbrand
Keyword(s):  
High Temperature ◽  
Electric Furnace ◽  
High Temperature Oxidation ◽  
Temperature Oxidation

High Temperature Oxidation Behaviors of Fe-Cr-Al Based Powder Porous Metal and a Strip

2013 ◽  
Vol 51 (10) ◽  
pp. 743-751 ◽  
Author(s):  
Seon-Hui Lim ◽  
Jae-Sung Oh ◽  
Young-Min Kong ◽  
Byung-Kee Kim ◽  
Man-Ho Park ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Porous Metal ◽  
Temperature Oxidation ◽  
Oxidation Behaviors

Effect of CaO Addition on the High-Temperature Oxidation of Mg Alloys

2016 ◽  
Vol 54 (6) ◽  
pp. 390-399 ◽  
Author(s):  
Dong Bok Lee ◽  
Shae Kwang Kim ◽  
Soon Yong Park
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Mg Alloys ◽  
Temperature Oxidation
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