Sulfate process titanium dioxide sintering device and method

Abstract

The invention discloses a sulfate process titanium dioxide sintering device and method. According to the sulfate process titanium dioxide sintering device, an exhaust system is provided with a tube type heat exchanger to heat combustion support air of a combustor through the waste heat of exhaust, so that the temperature of the gas combustion support air can be increased, and meanwhile the temperature of the exhaust can be reduced; gas consumption at the combustor can be reduced, the cooling stress of the exhaust system can be eased, and heat produced by the exhaust can be fully recycled. Besides, the sulfate process titanium dioxide sintering device cools down a cooling kiln through a water cooling manner, heat of the cooling kiln completes a water cooling process, and hot water is desalinated through a water treatment device into desalinated water for being used by a metatitanic acid washing station, so that circulation of waste heat can be achieved. Tested by practical production, the sulfate process titanium dioxide sintering device is stable in operation, low in fault rate of main equipment and beneficial to reducing steam consumption, water consumption and gas consumption during entire titanium dioxide production and has the advantages of being energy-efficient and low in cost.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a sulfuric acid method titanium dioxide calcination device and method. Background technique [0002] In the existing production and calcination process of titanium dioxide (titanium dioxide), the metatitanic acid, which has been squeezed to remove part of the water, is evenly and stably sent into the rotary kiln from the high end of the rotary kiln (that is, the kiln tail) through the spiral. It is installed obliquely, when the material rolls along the barrel and moves along the axial direction of the barrel; the burner is at the lower end of the barrel (that is, the kiln head), and the gas is injected into the special combustion chamber and The high-temperature flue gas is generated in the mixing chamber, enters the cylinder part, and is discharged through the high end after exchanging heat along the cylinder. The temperature of the exhausted flue gas is 400-500 ° C....

AI Technical Summary

Problems solved by technology

[0004] In addition, in the existing process, the kiln head blanking adopts an air-cooled cooling kiln, which is made of stainless steel, and the investment is high. Due to the excessive wind speed, the equipment is large-scaled, and the heat exchange time is short, which is not conducive to the full utilization of waste heat.

And because the temperature of Venturi spray circulating water keeps rising, a large amount of industrial water needs to be supplemented to cool down, resulting in high steam consumption, water consumption and gas consumption in the entire titanium dioxide production process, and high cost

Images