Glass kiln waste heat power generation smoke and air valve

What is the use of exhaust gases in a kiln?

Exhaust gases can also be used for drying and preheating kiln feed in the raw grinding stages. Cogeneration, instead of meal preheating is another option of heat recovery.

What is the power generation potential of glass industry?

Figure 12 shows the theoretical power generation potential from glass industries; the power generation potential for medium-grade waste heat is 743 GWh, and the available theoretical low-grade waste heat is 571 GWh. Waste heat to power generation technology is still not widely adopted in India.

What is a typical exhaust temperature for a preheater kiln?

As discussed in Section 4, economizers on waste heat boilers have typical exhaust temperatures of 300°F [150°C], four stage cement preheater kilns have exhaust temperatures around 640°F [340°C], and recuperative glass furnaces have exhaust temperatures around 1,800°F [982°C].

What is a ceramic kiln?

The ceramic kiln was a roller kiln fueled by water gas. The pilot test demonstrated the effectiveness of this technology in treating pollutants in ceramic flue gas, with SO 2, NO x, HCl, F −, and heavy metal (Pb, Cd, Ni, and their compounds) removal rates over 95%, 50%, 85%, 85%, and 85%, respectively.

How much heat is recovered from a cement kiln?

While heat recovery from cement kilns is common, about 83 TBtu/yr of medium temperature waste heat is still unrecovered from kiln off gases in the United States cement industry (Table 11). These waste heat losses can be reduced through the installation of additional preheating stages or by using cogeneration technologies.

What is wet absorption technology in a high-sulfur coal cement kiln?

Wet absorption technology is used to remove SO 2 from the flue gas of a high-sulfur coal cement kiln. To more uniformly distribute gas flow, enhance the two-phase gas contact (mass transfer) effect, and increase gas-liquid separation in the tower, a dual cyclone-enhanced desulfurization device was developed, as shown in Appendix A Fig. S4.