New developed waste sulfuric acid recovery process and unit during titanic dioxide production

Detailed Product Description

With the operation of the recovery unit, no waste sulfuric acid discharging was completely realized, obvious profit both in social and economic respects were obtained.

Advantages:

1.High profit out of low investment. The cost of our unit is only 1/10 of cost of imported ones on the basis of same scale. Investment  can be paid back with 1 year operating.

2.Advanced technology. Among the existing waste sulfuric acid recovery system for titanium dioxide production, our unit comes on top in the respects of process technology and profit obtaining.

3.Low energy consumption. Utilization of 300 kiln tail gas could concentrate 20% waste sulfuric acid to 32% and save plenty of water for spraying and cooling.

4.Long service life. Our graphite equipment could be operated with 20~70% sulfuric acid at high temperature. Performance of weak sulfuric acid concentration column by using kiln tail gas form titanic dioxide production is proved by stable operation in several plants, it could stand the brushing of 480 acidic kiln tail gas free from oxide etching. Problems of anti-corrosive liners peeling from shell in large equipment and different linear expansion coefficients are solved. Development of new graphite circular block reboiler ends the problems of break and leakage easily occurred in tubular heat exchanger.