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Sludge dewatering equipment "differential"

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Sludge dewatering equipment "differential"

Date of release:2018-04-03 Author:龙粤环保 Click:

"Differential speed" is the difference between the rotation speed of the drum and the screw of the sludge dewatering equipment, that is, the relative rotation speed between the two, adding or reducing the "differential speed", and the sludge staying in the drum also changes. It has a very major impact on the results of sludge dewatering equipment disposal.

"Differential speed" should be selected according to the following criteria: When the inflow of mud is inevitable, if the differential is low, the sludge will stay in the centrifuge for a long time, the dewatered sludge will be more dry, the supernatant will be cloudy, and the disposal The ability is also lower than that; if the differential is high, the sludge will stay in the centrifuge for a short period of time, and the dewatered sludge will be more wet, but the disposal capacity is also higher, and the sludge dried by the centrifugal meter is spirally pushed out in real time. , will not return to the supernatant due to the length of stay, the solid receiving rate is also greatly increased, the supernatant clear.

However, if the differential speed is too large, the greater the relative activity between the drum and the spiral, the more disturbing the liquid ring layer will be. The separated sludge in the solid ring layer will be transferred from the new pan to the liquid ring layer. With the flow of liquid (supernatant cloudy). If the supernatant contains a large amount of solids, indicating that the dry solids load on the differential centrifuging meter is relatively large, and therefore in response to the increase in differential speed, after the differential increases, the reduction in sludge concentration during centrifugation will be dehydrated. The dry sludge sludge was quickly introduced from the centrifuge, so that it did not return to the liquid phase. This would add dry sludge production and would reduce the solids content of the supernatant.

Therefore, the differential velocity of sludge dewatering equipment should be determined based on the nature of the material, the size of the disposal, the disposal requirements, and the construction parameters of the centrifuge.


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Key word:带式压滤机,带式污泥脱水设备,带式污泥脱水机

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