Combination liquefied natural gas expansion and desalination apparatus and method专利检索-液化天然气燃料气体燃料燃料种类专利检索查询-专利查询网

Combination liquefied natural gas expansion and desalination apparatus and method

阅读：769发布：2023-05-27

专利汇可以提供Combination liquefied natural gas expansion and desalination apparatus and method专利检索，专利查询，专利分析的服务。并且A method and combined apparatus for vaporizing liquefied natural gas and expanding the gas through a turbine for generating power is described. The energy for heating the liquefied natural gas for vaporization is obtained by transferring heat from sea water or other saline water. The water, so cooled, is then passed to a vacuum freezing, vapor compression system for obtaining fresh water and brine. In another embodiment, cooling of sea water is obtained from cold natural gas already expanded through a first turbine for producing shaft horsepower. Energy for vaporizing and expanding the liquefied natural gas is obtained by transferring heat from compressed air. The air so cooled is liquefied and fractionated to produce liquid nitrogen and either liquid or gaseous oxygen. In both embodiments shaft horsepower from the turbines is coupled to the compressor of the vacuum freezing, vapor compression apparatus. The power available from natural gas expansion is augmented by power from a steam or gas turbine. Waste heat from the turbine is employed for distillation desalination. If desired, an electrical generator can be coupled to the turbines for providing peaking power.，下面是Combination liquefied natural gas expansion and desalination apparatus and method专利的具体信息内容。

权利要求

2. A combination as defined in claim 1 wherein liquefied natural gas is supplied to the heat exchanger; and further comprising: compressor means for pressurizing liquefied natural gas.

3. A combination as defined in claim 1 further comprising: second turbine means for generating additional shaft horsepower and coupled to the means for compressing; means for burning natural gas from the first turbine means for generating steam; and means for operating the second turbine means with the steam.

4. A combination as defined in claim 3 further comprising; means for distilling saline water with heat from the second turbine means.

5. A combination as defined in claim 3 further comprising; electrical generator means; means for coupling the generator means to the turbine means for generating electricity.

6. A combination natural gas vaporization and water desalination apparatus comprising: a first heat exchanger; means for supplying liquefied natural gas to the first heat exchanger; means for supplying pressurized air to the first heat exchanger in heat transfer relation to liquefied natural gas. means for liquefying at least a portion of the pressurized air; a second heat exchanger; means for conveying cold natural gas from the first heat exchanger to the second heat exchanger; means for supplying saline water to the second heat exchanger in heat exchange relation with the cold natural gas; first turbine means connected to the natural gas outlet from the first heat exchanger and an outlet coupled to the inlet of the second heat exchanger for converting natural gas expansion to shaft horsepower; second turbine means having an inlet coupled to the natural gas outlet from the second heat exchanger for converting natural gas expansion to shaft horsepower; means for freezing ice connected to the saline water outlet from the second heat exchanger; and means for recovering fresh water from the ice.

7. A combination as defined in claim 6 wherein the means for freezing and means for recovering comprises: means for vaporizing water and forming ice; means for compressing water vapor; and means for contacting compressed water vapor and ice for condensing vapor and melting ice; and wherein the first and second turbine means are coupled to the means for compressing.

8. A combination as defined in claim 6 further comprising means for separating liquid nitrogen from liquefied air.

9. A combination as defined in claim 8 further comprising means for recovering oxygen from the liquefied air.

10. A combination natural gas vaporization and water desalination method comprising the steps of: exchanging heat between relatively colder natural gas and relatively warmer saline water; generating shaft horsepower from expanding natural gas; vaporizing a portion of the cooled saline water and forming ice and concentrated brine; separating the ice from the brine; compressing the water vapor by direct application of The shaft horsepower; and contacting the separated ice and compressed water vapor for condensing vapor and melting ice.

11. A method as defined in claim 10 wherein liquefied natural gas is brought into heat exchange relation with the sea water; and further comprising the step of: pressurizing the liquefied natural gas prior to exchanging heat with the sea water.

12. A method as defined in claim 10 further comprising the steps of augmenting shaft horsepower with energy obtained from burning natural gas; and distilling saline water with heat from the burning natural gas.

13. A combination natural gas vaporization and water desalination method comprising the steps of: exchanging heat between liquefied natural gas and compressed air; liquefying at least a portion of the cooled compressed air; exchanging heat between relatively colder natural gas from the first exchanging step and relatively warmer saline water; generating shaft horsepower from expanding natural gas; vaporizing a portion of the cooled saline water and forming ice and concentrated brine; separating the ice from the brine; compressing the water vapor by direct application of the shaft horsepower; and contacting the separated ice and compressed water vapor for condensing vapor and melting ice.

14. A method as defined in claim 13 further comprising the step of separating liquid nitrogen from the liquefied air.

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Combination liquefied natural gas expansion and desalination apparatus and method

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