Separation of oil from transformer filter cake
OwnerFrank C. Hume, Alan A. Downieinventors
Life of this patent
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Abstract
The separation of oil from filter cake, such as a transformer filter cake, is achieved by contact mixing filter cake with protein additives in water for a sufficient time for substantially all the oil to be displaced from the filter cake, flushing displaced oil and filter medium with water in a separating device and collecting the oil and the filter medium separately. The separation occurs with little or no remediation of the oil taking place so that both the oil and the filter medium can be reused.
Claims25
A process for separating oil from filter cake, comprising the steps of:
- contact mixing filter cake with protein additives in water, said protein additives being selected from the group consisting of powdered cows milk, soy bean oil, soya bean meal, fish oil, fish meal, rendering plant byproducts, slaughter house byproducts, brewery residues and brewery bottoms, said mixing for a sufficient time for substantially all the oil to be displaced from the filter cake;
- flushing displaced oil and filter medium with water in a separating means;
- collecting oil from the separating means, and
- collecting filter medium separately from the oil.
A process for separating oil from filter cake, comprising the steps of:
- contact mixing filter cake with protein additives in water, said protein additives being selected from the group consisting of powdered cows milk, soya bean oil, fish oil, fish meal, rendering plant byproducts, slaughter house byproducts, brewery residues and brewery bottoms, said mixing for a sufficient time for substantially all the oil to be displaced from the filter cake;
- flushing displaced oil and filter medium with water in a dehydrator separating means with a weir overflow;
- collecting oil flowing over the weir overflow in an oil collecting container means with the protein additives and water, and
- collecting filter medium fed from the dehydrator separating means in a filter medium bin.
Dependencies are inferred from the claim text.