The Experimental Investigation on the Internal Temperature Field of Regenerative Burners

2013 ◽  
Vol 291-294 ◽  
pp. 1723-1727
Author(s):  
Zhong Jun Tian ◽  
Shi Ping Jin ◽  
Yu Ming Liang ◽  
Kui Tian ◽  
Zhen Biao Hao ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Experimental Investigation ◽  
Temperature Field ◽  
Flue Gas ◽  
Industrial Furnace ◽  
Internal Temperature ◽  
Heating Curve ◽  
Combustion Technology ◽  
Regenerative Cells

The application of regenerative combustion technology to industry burners has been a huge success. This paper presents an experimental study on the change of the temperature field and the concentration of NO in the flue gas in an industrial furnace. The result showed that the concentration of NO increased with the rise of temperature. For the reversing time of 20s, 40s, 60s, and 80s, the temperature of each point changed in accordance with similar rules, but the temperature of the former three measuring points did not obviously change. The heat transfer occured mainly in the last two layers of the regenerative cells, and the utilization of all the regenerators was only 40 percent. The heating curve of the sixth measuring points was significantly different from the cooling one. With the increase of the reversing time, the flue gas and the air temperature variation also increased.

Experimental Study of the Temperature Field Equation in the Leeward Tunnel during Mine Fire Period

2012 ◽  
Vol 588-589 ◽  
pp. 1842-1848
Author(s):  
Wen Cai Wang ◽  
Yu Hong Jiang ◽  
Tao Hou ◽  
Wei Liu ◽  
Yang Lu ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Temperature Field ◽  
Field Equation ◽  
Wind Speed ◽  
Stable Phase ◽  
Measuring Point ◽  
Mine Fire ◽  
Mine Roadway ◽  
Set Up

According to the principle of heat transfer, the temperature field equation in the leeward tunnel was set up and the experimental device with a ratio of 1:20 was built. When it happened to fire in roadway, the correctness of the temperature field equation can be verified by the experiment. In experiments, the armored thermocouple and color paperless recorder were used to record the temperature of each measuring point. The S-3-300 pitot tube and YJB-2500 compensation micro-manometer were used to determine the wind speed. When the mine roadway fired, the experiment determined the temperature field equation experiment coefficient of Kc. It showed that in the developing phase of the fire Kc= 15 ~ 20, in the stable phase of the fire Kc= 10 ~ 15, in the failing phase of the fire Kc= 20 ~ 25.

Numerical Simulation on Process of Flow and Heat Transfer in Upright Magnesium Reducing Furnace

2011 ◽  
Vol 383-390 ◽  
pp. 6657-6662 ◽  
Author(s):  
Jun Xiao Feng ◽  
Qi Bo Cheng ◽  
Si Jing Yu
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Temperature Field ◽  
Flue Gas ◽  
Gas Flow ◽  
Three Dimensional ◽  
Reaction Heat ◽  
Flow And Heat Transfer ◽  
Major Factors ◽  
High Chemical Reaction

Based on the analysis of structural characteristic superiority, the process of combustion, flue gas flow and heat transfer in the upright magnesium reducing furnace, the three dimensional mathematical model is devoloped. And numerical simulation is performed further with the commercial software FLUENT. Finally, the flow and temperature field in furnace and temperature field in reducing pot have been obtained. The results indicate that the upright magnesium reducing furnace has perfect flue gas flow field and temperature field to meet the challenge of the magnesium reducing process; the major factors that affect the magnesium reducing reaction are the low thermal conductivity of slag and the high chemical reaction heat absorption.

The Feasibility Analysis of Applying SCR Technology to Regenerative Combustion System

2012 ◽  
Vol 610-613 ◽  
pp. 1747-1750
Author(s):  
Zhong Jun Tian ◽  
Shi Ping Jin ◽  
Tan Li ◽  
Zhen Biao Hao ◽  
Wu Qi Wen
Keyword(s):  
Flue Gas ◽  
Waste Heat ◽  
Catalytic Reduction ◽  
Catalytic Reactions ◽  
Feasibility Analysis ◽  
Combustion System ◽  
Combustion Technology ◽  
Temperature Window ◽  
Regenerative Cells ◽  
Industrial Heating

The regenerative combustion technology has been widely used in the recovery of flue gas waste heat, but the denitration is not considered. This article is based on the comprehensive application of the Selective Catalytic Reduction(SCR) technology and the regenerative combustion technology to recycling waste heat and removing NOx from flue gas. In many industrial heating processes, the temperature of flue gas falls from above 1000°C to the ambient temperature (50°C-100°C) along regenerators, while the temperature window of most catalysts ranges from 200°C to 450°C, meanwhile catalysts and regenerative cells are porous mediums, so the regenerative cells that hold a temperature range for catalytic reactions can be replaced by catalysts, and the waste heat of flue gas can be recovered and the nitrogen oxides can be removed simultaneously.

Experimental study on flue gas condensate capture and heat transfer in staggered tube bundle heat exchangers

2018 ◽  
Vol 141 ◽  
pp. 819-827 ◽  
Author(s):  
Enlu Wang ◽  
Kai Li ◽  
Naveed Husnain ◽  
Deli Li ◽  
Jinda Mao ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Flue Gas ◽  
Heat Exchangers ◽  
Tube Bundle ◽  
Gas Condensate

An Experimental Study of Heat Transfer During Forced Convection over a Rectangular Body

1980 ◽  
Vol 102 (1) ◽  
pp. 146-151 ◽  
Author(s):  
F. L. Test ◽  
R. C. Lessmann
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Experimental Investigation ◽  
Aspect Ratio ◽  
Surface Temperature ◽  
Stagnation Point ◽  
Temperature Heat ◽  
Transfer Behavior ◽  
Rectangular Body ◽  
Rectangular Model

An experimental investigation has been performed to determine the constant surface temperature heat transfer behavior on the upper surface of a rectangular model with a chord length of 20.3 cm (8 in.) and an aspect ratio of 6/1. Data were obtained for angles of attack from 0 to 50 deg and freestream velocities of 9.1, 15.2, and 21.3 m/s (30, 50 and 70 ft/s). Separation existed on a portion of the upper surface for angles between 0 and 20 deg with the flow being turbulent after reattachment. Above 30 deg the flow was always laminar with the stagnation point on the upper surface. The heat transfer results in the laminar case were strongly influenced by freestream disturbances.

Experimental Study on the Performance of Heat Transfer of a Novel Liquid-Gas Two-Phase Flow Scrubber for Flue Gas Desulfurization

2005 ◽  
Author(s):  
Li-Jun Fang ◽  
Hong-Peng Song ◽  
Qu-Lan Zhou ◽  
Shi-En Hui ◽  
Tong-Mo Xu
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Flue Gas ◽  
Two Phase Flow ◽  
Liquid Velocity ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Type

Gas-liquid screen, a novel liquid-gas two-phase flow type, is applied in a scrubber for WFGD. According to the characters of the flow type, heat transfer experiments have been conducted to study the temperature distribution of flue gas in the tower and find the relation between heat transfer coefficient, flue gas and liquid velocity. The results show that whether in concurrent or countercurrent tower the heat transfer coefficient will increase with L/G decreasing at a fixed gas velocity. The optimum position of heat transfer is at the top of the Gas-liquid screen. So multilayer ‘Gas-liquid screen’ could to be arranged to optimize the effect of heat transfer and reduce the industry cost. The formulas of the relation between heat transfer coefficient, flue gas and liquid velocity are gained. These can provide strong foundation for the engineers and the further mass transfer experimental study.

Heat Transfer Characteristics of O2/CO2 Pulverized Coal Boiler Furnace

2013 ◽  
Vol 401-403 ◽  
pp. 375-378
Author(s):  
Jian Qiang Gao ◽  
Nan Nan Xue ◽  
Xin Sun ◽  
Hai Kun Xing
Keyword(s):  
Heat Transfer ◽  
Global Warming ◽  
Flue Gas ◽  
Pulverized Coal ◽  
Physical Parameters ◽  
Heat Transfer Characteristics ◽  
High Concentration ◽  
Boiler Furnace ◽  
Transfer Characteristics ◽  
Combustion Technology

Global warming is currently one of the most serious environmental challenges in the world. The increase of CO2 in the atmosphere is a dominating factor to global warming .O2 / CO2 combustion technology is a new generation of clean coal power generation technology[1],it can directly capture high concentration of CO2 and make the pollutant resource ,so it is one of the most promising feasible technical to reduce CO2 emissions [2]. Compared with conventional pulverized coal combustion boiler, O2 / CO2 combustion technology can be used to produce a CO2 rich flue gas stream. So physical parameters had a very big change, such as flue gas heat capacity, motion viscosity, prandtl number and so on. Thus they affect the heat transfer characteristics [3] inside the furnace.In order to study the heat transfer characteristics of the furnace; this paper established a dynamic mathematical model for the radiation heat transfer progress of the furnace and adequate for control system design.

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