所谓脱硫石膏是指将石灰石粉(磨粉机制得)加水制成浆液作为吸收剂泵入吸收塔与烟气充分接触混合,烟气中的二氧化硫与浆液中的碳酸钙以及从塔下部鼓入的空气进行氧化反应生成硫酸钙,硫酸钙达到一定饱和度后,结晶形成二水石膏。经吸收塔排出的石膏浆液经浓缩、脱水,使其含水量小于10%,然后用输送机送至石膏贮仓堆放,这个含有二个结晶水的石膏称为二水石膏分子式为CaSO4·2H2O,此含有二个结晶水的硫酸钙晶体,就是脱硫石膏。

| 型号 | 体积(m³) | 参考功率(KW) | 低产量(KG) | 较高产量(KG) | 
| Ф1000x10000 | 7.85 | 5.5 | 2669 | 4670.75 | 
| Ф1200x10000 | 11.304 | 7.5 | 3843.36 | 6725.88 | 
| Ф1200x12000 | 13.5648 | 11 | 4612.03 | 8071.06 | 
| Ф1500x12000 | 21.195 | 11 | 7206.3 | 12611 | 
| Ф1500x15000 | 26.49375 | 15 | 9007.88 | 15763.8 | 
| Ф1800x15000 | 38.151 | 18.5 | 12971.3 | 22699.8 | 
| Ф1800x18000 | 45.7812 | 18.5 | 15565.6 | 27239.8 | 
| Ф2000x15000 | 47.1 | 22 | 16014 | 28024.5 | 
| Ф2000x18000 | 56.52 | 22 | 19216.8 | 33629.4 | 
| Ф2000x20000 | 62.8 | 30 | 21352 | 37366 | 
| Ф2200x15000 | 56.991 | 30 | 19376.9 | 33909.6 | 
| Ф2200x18000 | 68.3892 | 37 | 23252.3 | 40691.6 | 
| Ф2200x20000 | 75.988 | 37 | 25835.9 | 45212.9 | 
| Ф2400x18000 | 81.3888 | 45 | 27672.2 | 48426.3 | 
| Ф2400x20000 | 90.432 | 45 | 30746.9 | 53807 | 
| Ф2600x18000 | 95.5188 | 45 | 32476.4 | 56833.7 | 
| Ф2600x20000 | 106.132 | 55 | 36084.9 | 63148.5 | 
| Ф2800x18000 | 110.7792 | 55 | 37664.9 | 65913.6 | 
| Ф2800x20000 | 123.088 | 55 | 41849.9 | 73237.4 | 
| Ф2800x24000 | 147.7056 | 55 | 50219.9 | 87884.8 | 
| Ф3000x20000 | 141.3 | 55 | 48042 | 84073.5 | 
| Ф3000x25000 | 176.625 | 75 | 60052.5 | 105092 |