Manufacturing method of precipitation method white carbon black waste liquid sedimentation separation device

The utility model relates to a sedimentation and separation device, in particular to a sedimentation and separation device for the sedimentation method of white carbon black waste liquid.
Silica, also known as hydrated silica, has a very broad application prospect because of its small particle size, large specific surface area, high temperature resistance and stable chemical properties. The field plays its unique role. At present, the conventional production methods of white carbon black mainly include gas phase method and precipitation method. Precipitation method white carbon black is generally prepared by neutralizing and precipitation reaction of silicate (usually sodium silicate) and inorganic acid (usually using sulfuric acid). After the hydrated silica is precipitated, according to the requirements of the finished product, it is filtered and washed in a roller filter press or a plate filter press to remove excess moisture and reaction by-products to obtain a silica filter cake, which is then dried to obtain the finished product. The waste liquid in the production process often fails to meet the standard of direct discharge and needs to be treated by sedimentation and separation.
Chinese patent CN20152001510104.9 discloses a kind of sedimentation separation pond in the white carbon black production process, it adopts four ponds to be connected in series, and the sidewall between the ponds gradually reduces, so that clear liquid gradually flows from the upper-level pond to the The next-level pond gradually separates impurities and solids, which is much more effective than the traditional single pond for sedimentation. However, the separated filtrate sometimes fails to meet the direct discharge standard. The utility model discloses a precipitation method white carbon black waste liquid sedimentation and separation device, which comprises a rectangular tank body, and the tank body includes a first-level tank, a second-level tank, a third-level tank, a fourth-level tank, a fifth-level tank and a sixth-level tank. Each pool is provided with a partition plate, the primary pool and the secondary pool are provided with a filter device, the side wall between each adjacent pool is provided with an overflow port, and each overflow port is provided with an overflow port. There is a wire mesh cage with a filter layer inside the wire mesh cage. The utility model has a simple structure and is easy to operate. Six pools are connected in series, and the waste liquid flows from the upper-level pool through the partition plate and the overflow port into the next-level pool, and passes through the filtering devices in the primary pool and the secondary pool. The wire mesh cage with multi-layer filter layers on the overflow port gradually separates impurities and solids, and finally obtains a clarified waste liquid, which achieves a good sedimentation separation effect.