Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Patent
1980-09-08
1982-03-02
Therkorn, Ernest G.
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
210777, 210791, 210106, 210125, 210143, 210167, B01D 3702, B01D 2938
Patent
active
043177328
ABSTRACT:
A liquid reconditioning system including first and second storage tanks for storing reconditioned liquid and liquid to be reconditioned, respectively. Reconditioned liquid is withdrawn from the first storage tank for use, as required, and returned to the second storage tank. A filter is connected to receive liquid withdrawn from the second tank to filter that liquid and transfer it to the first tank. The present invention detects a condition representative of filter blinding and responds to that condition to automatically regenerate the filter. In a preferred embodiment, the filter is a diatomite filter with filter regeneration being accomplished by mechanical diatomite displacement. A valve at the filter output closes that output during diatomite displacement and then sequentially connects the filter output to the second storage tank, for a predetermined period, and then to the first storage tank. Filter blinding may be detected by monitoring the liquid level in the first storage tank, the decrease in that liquid level indicating that the liquid flow through the filter is below that necessary to maintain an adequate supply for use. Alternatively, a flow meter may be employed at the output of the filter to assure that the flow through the filter is adequate to satisfy the usage requirements.
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Andrew Engineering, Inc.
Therkorn Ernest G.
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