Regenerative burners

Burner Regenerative burner 76 units. Regenerator honeycomb... 

FIG. 27-56 Schematic of a regenerative burner system. (Notth American Manufactuting Co.)... 

We adopt the nomenclature introduced by Hawthorne and Davis [1], in which compressor, heater, turbine and heat exchanger are denoted by C, H, T and X, respectively, and subscripts R and I indicate internally reversible and irreversible processes. For the open cycle, the heater is replaced by a burner, B. Thus, for example, [CBTX]i indicates an open irreversible regenerative cycle. Later in this book, we shall in addition, use subscripts... 

A typical side-port continuous regenerative glass furnace is shown in Fig. 24-44. Side-port furnaces are used in the flat and container glass industries. The burners are mounted on both sides of the furnace and the sides fire alternately. Refractory-lined flues are used to recover the energy of the hot flue gas. The high temperature of the flue gas leaving the furnace heats a mass of refractory material called a checker. After the checker has reached the desired temperature, the gas flow is reversed and the firing switches to the other side of the furnace. The combustion air is then heated by the hot checker and can reach 1533 K (2300°F). The cycle of airflow from one checker to the other is reversed approximately every 15 to 30 min. 

Figure 5.5a depicts a combined plant in which a closed Brayton helium nuclear plant releases heat to a recovery steam generator, which supplies heat to a Rankine steam plant. The generator is provided with a gas burner for supplementary additional heat when the demand of steam power is high. The Rankine plant is a regenerative cycle. 

Proper use of oxygen enrichment can deliver many of the benefits of electric boost while decreasing melting cost. Typically, electric boost reduction is accomplished by either undershot enrichment or supplemental oxy/fuel burners. Undershot is more common on side-port regenerative furnaces, where installation of burners... 

Oxygen-based combustion delivers several control benefits that allow the operator to improve glass quality. Operators of regenerative furnaces are limited in tailoring the furnace profile by the flow patterns within the checkers. As noted previously, these flow patterns can change as the furnace ages. Oxy/fuel burners allow the... 

Rafidi, N., and Blasiak, W. "Heat Transfer Characteristics of HiTAC Heating Furnace Using Regenerative Burners." Applied Thermal Engineering 26, no. 16 (2006) 2027-34. 

---