System and method for purifying an aqueous stream
First Claim
1. A system to purify a waste fluid stream, the system comprising:
- a recirculation pump having an inlet for a recirculation stream and an outlet to expel a pressurized stream, the recirculation stream comprising a waste fluid stream and a recycled liquid bottoms stream;
a compressor having an inlet for an evaporation stream and an outlet for a pressurized evaporation stream;
a primary heat exchanger having inlets for the pressurized stream and the pressurized evaporation stream, having an internal surface area for heat transfer from the evaporation stream to the pressurized stream, and having outlets for a cooled evaporation stream and a heated pressurized stream, whereinthe heated pressurized stream is formed by heating the pressurized stream, andthe cooled evaporation stream is formed by cooling the evaporation stream; and
an evaporation unit having an inlet for the heated pressurized stream and outlets for the evaporation stream and the recycled liquid bottoms stream, whereinthe evaporation stream is formed when volatile compounds in the heated pressurized stream evaporate in the evaporation unit, andthe liquid bottoms stream is formed from a portion of the heated pressurized stream that does not evaporate.
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Accused Products
Abstract
A system and method are disclosed for purifying a waste fluid stream. The system includes a recirculation pump having an inlet for a recirculation stream and an outlet to expel a pressurized stream. The system includes a compressor having an inlet for an evaporation stream and an outlet for a pressurized evaporation stream. A primary heat exchanger has inlets for the pressurized stream and the pressurized evaporation stream, an internal surface area for heat transfer from the evaporation stream to the pressurized stream, and outlets for a cooled product stream and a heated pressurized stream. The heated pressurized stream is formed by heating the pressurized stream and the cooled product stream is formed by cooling the evaporation stream. The system includes an evaporation unit having an inlet for the heated pressurized stream and outlets for an evaporation stream and the recycled liquid bottoms stream.
45 Citations
47 Claims
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1. A system to purify a waste fluid stream, the system comprising:
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a recirculation pump having an inlet for a recirculation stream and an outlet to expel a pressurized stream, the recirculation stream comprising a waste fluid stream and a recycled liquid bottoms stream; a compressor having an inlet for an evaporation stream and an outlet for a pressurized evaporation stream; a primary heat exchanger having inlets for the pressurized stream and the pressurized evaporation stream, having an internal surface area for heat transfer from the evaporation stream to the pressurized stream, and having outlets for a cooled evaporation stream and a heated pressurized stream, wherein the heated pressurized stream is formed by heating the pressurized stream, and the cooled evaporation stream is formed by cooling the evaporation stream; and an evaporation unit having an inlet for the heated pressurized stream and outlets for the evaporation stream and the recycled liquid bottoms stream, wherein the evaporation stream is formed when volatile compounds in the heated pressurized stream evaporate in the evaporation unit, and the liquid bottoms stream is formed from a portion of the heated pressurized stream that does not evaporate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A system to purify a waste fluid stream, the system comprising:
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a recirculation pump having an inlet for a recirculation stream and an outlet to expel a pressurized stream, the recirculation stream comprising a waste fluid stream and a recycled liquid bottoms stream; a compressor having an inlet for an evaporation stream and an outlet for a pressurized evaporation stream; a primary heat exchanger having inlets for the pressurized stream, the pressurized evaporation stream, and a heat transfer fluid, the heat exchanger transferring heat from the heat transfer fluid and from the evaporation stream to the pressurized stream; an evaporation unit having an inlet for the pressurized stream and outlets for the evaporation stream and the recycled liquid bottoms stream; a stripping vessel having inlets for the evaporation stream, a recycled bottoms stream, and a stripper reflux stream and outlets for a stripper vapor outlet stream and a stripper bottoms stream; a stripper recycle pump having an inlet for the stripper bottoms stream and an outlet for the recycled bottoms stream; a reboiler having inlets for the recycled bottoms stream and a heat transfer fluid, the reboiler having an internal surface area for heat transfer from the heat transfer fluid to the recycled bottoms stream; a condensing unit having an inlet for the stripper vapor outlet stream and outlets for a volatile fractions stream, a non-condensable stream, and the stripper reflux stream, wherein the stripper reflux stream returns to the stripping vessel; a secondary recovery heat exchanger having inlets for the waste fluid stream and the final product stream, the heat exchanger transferring heat from the final product stream to the waste fluid stream.
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34. A method to purify a waste fluid stream, the method comprising:
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joining a waste fluid stream with a concentrated bottoms stream from an evaporation unit to form a pressurized stream; recirculating the pressurized stream through a primary heat exchanger and the evaporation unit; transferring heat from a compressed evaporation stream to the pressurized stream to form a heated pressurized stream; and evaporating volatile compounds from the heated pressurized stream in the evaporation unit and passing the volatile compounds through a compressor to become the compressed evaporation stream, the volatile compounds forming the evaporation stream; wherein the concentrated bottoms stream comprises a portion of the heated pressurized stream that does not evaporate. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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Specification