Screening plant of filter cake drying machine

Abstract

The invention discloses a screening plant of a filter cake drying machine. The screening plant comprises a crushing chamber arranged at the upper portion of the drying machine and a drying chamber arranged at the lower portion of the drying machine, a screening plant body is arranged between the crushing chamber and the drying chamber and is arranged in the drying machine, the screening plant comprises a movable screening plate on the upper layer and a fixed screening plate on the lower layer, the movable screening plate is located below the crushing chamber, the two ends of the movable screening plate are in sliding connection with sliding rails, the sliding rails are fixedly connected to the drying machine, the fixed screening plate is arranged under the movable screening plate, a gap isreserved between the fixed screening plate and the movable screening plate, the two ends of the fixed screening plate are fixedly connected to the sliding rails, and the movable screening plate slides back and forth in the rail directions of the sliding rails through a power device. The screening plant is used for sorting and further crushing crushed materials, it is guaranteed that the crushed materials entering the drying chamber are qualified crushed materials, and the crushing effect of the crushing chamber is improved.

Description

technical field [0001] The invention relates to the field of filter cake treatment and drying equipment, in particular to a screening device of a filter cake dryer. Background technique [0002] In the production of gelatin, the generation of waste water mainly comes from the processes of degreasing, pickling, liming, neutralization, and glue making. When the waste water is purified, it will produce a large amount of sludge. Traditionally, the sewage generated by gelatin waste water The sludge treatment method is to send the sludge to a filter press for pressure filtration, and then obtain a filter cake with a water content of 18-27wt%, which is dried in the yard and then sent to the fertilizer plant. Because the filter cake contains a large amount of bone waste, organic matter and colloids, during the drying process of the storage yard, under the action of microorganisms, the filter cake is decomposed by microorganisms and releases foul-smelling gases, resulting in a bad en...

AI Technical Summary

Problems solved by technology

For the first treatment method, since the filter cake is lumpy and has poor thermal conductivity, in order to make the water content of the filter cake below 5wt% (the filter cake with a water content below 5wt% has the best effect of preventing microbial decomposition, the filter cake should be can be stacked for a long time), in the drying process, the traditional propeller dryer and rake dryer consume a lot of energy and take a long time. For each ton of filter cake processed, the energy consumption reaches 60 degrees, and the time consumption reaches 1h. The cost is relatively high, and the filter cake is not completely dried, and the water content in the core of the filter cake is high. During the stacking process, the residual heat of the filter cake forces the water in the core of the filter cake to evaporate to form water vapor, which is not suitable for stacking in a closed storage area. Internal; for the second treatment method, the cost of raw materials used in the fertilizer plant becomes higher, the profit becomes lower, and the environmental protection pressure of the fertilizer plant increases, which is not conducive to the reuse of filter cakes

[0004] Crushing the filter cake and then drying it is an ideal drying method that can save energy. However, due to the particularity of the filter cake produced by gelatin wastewater, the filter cake has a large amount of bone waste, organic matter and colloids. Certain viscous and elastic, general spiral crushing and roller crushing methods cannot completely crush the filter cake, and the crushed crushed material still contains a certain amount of large pieces of material, and the crushing effect is relatively poor. During the subsequent drying process, Energy saving is not significant, further improvement is needed

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