The invention provides methods and an apparatus for more efficiently and economically producing purified water from sea water or some other salty or brackish water source. The efficiency is derived from the co-location with a power plant or other thermal generating source that will heat the feed wat
The invention provides methods and an apparatus for more efficiently and economically producing purified water from sea water or some other salty or brackish water source. The efficiency is derived from the co-location with a power plant or other thermal generating source that will heat the feed water. Reverse osmosis membrane filtration systems work optimally when the feed water is at certain higher temperature, where that temperature is typically higher than the feed water at ambient temperatures. By using the heated sea water as the byproduct of the power plant electricity generating process and if necessary mixing it with ambient temperature sea water, if needed to lower the water temperature, and using this feed water with a higher temperature than ambient water temperature, the efficiency of the reverse osmosis system can be increased.
대표청구항▼
1. A purification system comprising:an ambient variable speed pump that inputs sea water and outputs through an ambient feed water line; a power plant that inputs sea water and outputs heated sea water through a high temperature variable speed pump to a high temperature feed water line, where high t
1. A purification system comprising:an ambient variable speed pump that inputs sea water and outputs through an ambient feed water line; a power plant that inputs sea water and outputs heated sea water through a high temperature variable speed pump to a high temperature feed water line, where high temperature is a temperature higher than the ambient temperature; a first temperature sensor in said ambient feed water line; a second temperature sensor in said high temperature feed water line; a blender that receives said ambient feed water and said high temperature feed water from said ambient feed water line and said high temperature feed water line, respectively, blends said ambient feed water and said high temperature feed water, and outputs blended feed water through a blended feed water line; a third temperature sensor in said blended feed water line; a pretreatment filter that receives said blended feed water from said blended feed water line, separates blended feed water into filtered feed water, pretreatment unusable water, and pretreatment solid waste, and outputs said filtered feed water through a filtered feed water line, said pretreatment unusable water through a pretreatment unusable water line, and said pretreatment solid waste through a pretreatment solid waste line; a first purification feed pump that receives said filtered feed water from said filtered water feed water line, pumps and outputs said filtered feed water through a first feed pump line; a first membrane filter that receives said filtered feed water from said first feed pump line, separates, and outputs first membrane filter unusable water through a first membrane unusable line and first membrane filter output water through a first membrane output line; a first membrane pressure sensor located in first purification pump line; a separator that receives said first membrane filter output water from said first membrane output line, separates, and outputs first membrane output usable water through a first membrane output usable line and first membrane output potentially usable water through a first membrane output potentially usable line; a second membrane feed pump that receives said first membrane output potentially usable water from said first membrane potentially output usable line, pumps, and outputs said first membrane output potentially usable water through a second purification feed pump line; a second membrane pressure sensor located in said second purification feed pump line; a second membrane filter that receives said first membrane output potentially usable water from said second purification feed pump line, separates, and outputs second membrane usable water through a second membrane usable line and second membrane unusable water through a second membrane unusable line; an energy recovery turbine disposed in said first membrane unusable line; an unusable output line that receives said first membrane filter unusable water and second membrane unusable water from said respective first and second membrane unusable lines, mixes said waters, and outputs said mixed waters to a discharge; a membrane usable mixer that receives said first and second membrane usable water through said respective said first and second membrane usable water lines, mixes said waters, and outputs said mixed waters through a purified line; and a first storage tank for storing purified water, said tank receiving said mixed water from said purified line. 2. A purification system comprising:first feed water means for inputting first feed water, said first feed water being at an ambient temperature; second feed water means for inputting second feed water; thermal energy means for heating said second feed water, to cause said second feed water to have a high temperature, by exchanging heat from a power plant to second feed water, such that said second feed water is a by-product of said power plant, where said high temperature is a temperature higher than the ambient temperature; a blending means for mixing said ambient temperature first feed water and said high temperature second feed water, to thereby generated mixed ambient and high temperature feed water; and a purification means for desalinating said mixed ambient and high temperature feed water. 3. A purification system as in claim 2 further comprising: a filtration means for filtering said mixed ambient and high temperature feed water.4. A purification system as in claim 2 further comprising:a first temperature sensing means for sensing ambient feed water temperature; a second temperature sensing means for sensing high temperature feed water temperature; and a third temperature sensing means for sensing mixed ambient and high temperature. 5. A purification system as in claim 2 wherein said blending means controls the mixing of said first and second feed waters based on input from at least one of first, second or third temperature sensing means.6. A system as claimed in claim 2, wherein said power plan is an electricity generating power plant.7. A purification system comprising:an ambient feed water line to provide ambient water from a feed water supply; a first pump for pumping its input from said feed water supply and its output through an ambient water feed water line; a heat generating equipment for supplying high temperature water, where high temperature is a temperature higher than the ambient temperature; a high temperature feed water line; a second pump having its input from said heat generating equipment and its output through said high temperature feed water line; a blender for blending said ambient water and said high temperature water to achieve a desired temperature having its input from said ambient feed water line and the high temperature feed water line, and outputs a blended water through a blended feed water line; and a purifier for desalinating said blended water having as its input from said blended feed water, said purifier having its input from said blended feed water line and its output through a desalination output purified water line and desalination output unusable water line; a pretreatment filter for filtering the incoming blended feed water connected to the blended feed water line, and discharging filtrate through a filtered water line, said pretreatment having an unusable output water line, and a solid waste output line; wherein said first, and second pumps are variable feed speed pumps that are controlled by a controller; and wherein the heat generating equipment is a power plant. 8. A purification system as in claim 7 further comprising:said purifier including a first membrane filter having a membrane; a first feed pump for increasing the pressure of the water delivered to said first membrane filter, controlled by said controller and located in said filtered feed water line; a pressure sensor monitored by said controller located in said filtered feed water line between said first feed pump and said first membrane filter; and wherein said controller adjusts said feed pump based on the input from said pressure sensor. 9. A method of desalinating seawater comprising the steps of:locating a feed water desalination plant proximate to an electricity generating power plant that uses seawater to cool its power generation equipment; providing heated seawater that is a by-product of a cooling system of said electricity generating power plant; using said heated seawater by-product output from the power plant's cooling system as heated source water for the desalination plant; and operating the desalination plant to desalinate the feed water, the feed water including said heated source water. 10. A method as in claim 9 further comprising the steps of: using ambient seawater as ambient source water for the desalination plant and blending the heated source water and the ambient source water to make the feed water.11. A method as in claim 10, wherein said power plant has at least one supply of ambient seawater for use for cooling its power generating equipment, and further comprising the step of: using ambient seawater from the power plant supply as the ambient source water for the desalination plant.12. A method as in claim 11, wherein said power plant has at least one input line between the supply of ambient seawater and the power plant power generation equipment, and further comprising the step of: said desalination plant intaking the ambient source water from said input line upstream from said power generation equipment.13. A method as in claim 9, wherein said power plant has at least one output line and at least one discharge and outputs the cooling seawater outfall through said output line to said discharge, and further comprising the step of: said desalination plant taking the power plant cooling seawater from said output line upstream from said discharge.14. A method as in claim 13, further comprising the step of: outputting the desalination plant's unusable water to the power plant discharge.15. A method as in claim 9, wherein said power plant has at least one output line and at least one discharge and outputs the cooling seawater outfall through said output line to said discharge, and further comprising the step of: outputting the desalination plant's unusable water to the power plant discharge.
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