Desalination apparatus with power generation

• US 4,302,297 A
• Filed: 07/03/1980
• Issued: 11/24/1981
• Est. Priority Date: 05/24/1977
• Status: Expired due to Term

• Current Assignee: Gerald F. Humiston
• Original Assignee: Gerald F. Humiston
• Inventors: Humiston, Gerald F.
• Primary Examiner(s): Bascomb, Jr., Wilbur L.
• Application Number:
  US06/165,778
• Time in Patent Office: 509 Days
• Field of Search: 202/185 R, 202/181, 202/205, 202/202, 202/197, 203/10, 203/11, 203/DIG. 17, 203/1, 203/91, 203/100, 203/DIG. 20, 203/DIG. 16, 203/40, 60/641, 60/648
• US Class Current: 202/185.1
• CPC Class Codes: C02F 1/046 under vacuum produced by a barometric column
• CPC Class Codes: C02F 1/16 using waste heat from other processes
• CPC Class Codes: C02F 2209/42 Liquid level
• CPC Class Codes: Y02A 20/124 Water desalination
• CPC Class Codes: Y10S 203/11 Batch distillation
• CPC Class Codes: Y10S 203/17 Saline water conversion
• CPC Class Codes: Y10S 203/21 Acrylic acid or ester

Abstract

An apparatus for desalinating ocean waters by distillation and furnishing electrical power, utilizes an evaporator, barometric leg conduits, a closed condenser, ocean water circulating circuits for circulating warm surface water to the evaporator and cool ocean water to the condenser and using the mass flow of vapors evolved from the evaporator to drive a prime mover which in turn drives an electrical generator. A portion of the electrical power so-generated is used to control the operation of respective pumps and valves in the apparatus. The liquid level of the condensate water is controlled in a barometric leg condensate outlet conduit. The system is also provided with a vacuum pump at least for initiating a reduced pressure and particle separator channel means is provided to prevent liquid entrainment in the condenser.

Claims

1. An apparatus for desalinating ocean waters and furnishing electrical power, comprising in combination:

an evaporator;

a first conduit for connecting said evaporator to the warm surface water of the ocean;

said first conduit forming a barometric leg to separate the low internal pressure of the evaporator from the ambient atmospheric pressure during operation of said evaporator;

means for circulating the ocean water between said evaporator and the warm surface water of the ocean to replace the heat of vaporization lost in the evaporator;

a closed condenser comprising condenser cooling means connected by a second conduit to cool ocean water;

a first pump interposed in said second conduit for circulating cool ocean water through said condenser cooling means to cool the vapors evaporated from said evaporator;

said closed condenser isolating the vapors to be condensed from the cool ocean water;

a third conduit connecting said evaporator to said condenser for directing evaporator vapors into thermal contact with said condenser cooling means;

a prime mover interposed in said third conduit to be driven by the mass flow of vapors between said evaporator and said condenser resulting from the pressure differential between the saturated vapors in said evaporator and the saturated vapors in said condenser;

a particle separation channel interposed between said evaporator and said condenser for reducing the velocity of vapors from said evaporator to prevent non-vapors from entering said condenser;

a condenser conduit connected to said condenser for providing a barometric leg for the removal of condensed desalinated water from the lower pressure in said condenser to the higher pressure of the atmospheric air;

a condensate water output valve located in said barometric leg for recovering the condensed desalinated ocean water therefrom;

a liquid level control means to sense the level of the condensed desalinated ocean water in the barometric leg for controlling said condensate water output valve to maintain a desired level of condensed desalinated ocean water;

a vacuum pump in fluid communication with said third conduit for initially reducing the internal vapor pressure in said evaporator for initiating operation of the apparatus;

an electrical generator coupled to said prime mover for generating electrical power; and

an electrical control system for connecting said electrical power for controlling said pumps and said valve.

2. An apparatus as set forth in claim 1, wherein said particle separation channel comprises a region having a greater cross-sectional area than said third conduit.

3. An apparatus for desalinating ocean waters and furnishing electrical power, comprising in combination:

an evaporator;

a first conduit for connecting said evaporator to the warm surface water of the ocean;

said first conduit forming a barometric leg to separate the low internal pressure of the evaporator from the ambient atmospheric pressure during operation of said evaporator;

pump means for circulating the ocean water between said evaporator and the warm surface water of the ocean to replace the heat of vaporization lost in the evaporator;

a closed condenser comprising condenser cooling means connected by a second conduit to cool ocean water;

pump means interposed in said second conduit for circulating cool ocean water through said condenser cooling means to cool the vapors evaporated from said evaporator;

said closed condenser enabling heat exchange between the vapors from said evaporator and said cool ocean water in said condenser cooling means while isolating the vapors from the cool ocean water to prevent contamination of the condensed desalinated ocean water by the cool ocean water;

a third conduit connecting said evaporator to said condenser for directing evaporator vapors into thermal contact with said condenser cooling means;

a prime mover interposed in said third conduit to be driven by the mass flow of vapors between said evaporator and said condenser resulting from the pressure differential between the saturated vapors in said evaporator and the saturated vapors in said condenser;

a particle separation channel interposed between said evaporator and said condenser for reducing the velocity of vapors from said evaporator to prevent non-vapors from entering said condenser;

a condenser conduit connected to said condenser for providing a barometric leg for the removal of condensed desalinated water from the low pressure in said condenser to the higher pressure of the atmospheric air;

a condensate water output valve located in said barometric leg of said condenser conduit for controlling the liquid level of condensed desalinated ocean water in the barometric leg of said condenser conduit to recover the condensed desalinated ocean water therefrom;

a vacuum pump in fluid communication with said third conduit for initially reducing the internal vapor pressure in said evaporator for initiating operation of the apparatus;

an electrical generator coupled to said prime mover for generating electrical power; and

an electrical control system for connecting said electrical power for controlling said pumps and said valve.

4. An apparatus for desalinating ocean waters and furnishing electrical power, comprising in combination:

an evaporator;

a first conduit for connecting said evaporator to the warm surface water of the ocean;

said first conduit forming a barometric leg to separate the low internal pressure of the evaporator from the ambient atmospheric pressure during operation of said evaporator;

means for circulating warm surface ocean water in said barometric leg to replace the heat of vaporization lost in the evaporator;

a closed condenser means connected by a second conduit to cool ocean water for cooling said condenser;

a first pump interposed in said second conduit for circulating cool ocean water through said condenser cooling means to cool the vapors evaporated from said evaporator;

said closed condenser isolating the vapors to be condensed from the cool ocean water;

a third conduit connecting said evaporator to said condenser for directing evaporator vapors into thermal contact with said condenser cooling means;

a prime mover interposed in said third conduit to be driven by the mass flow of vapors between said evaporator and said condenser resulting from the pressure differential between the saturated vapors in said evaporator and the saturated vapors in said condenser;

means interposed between said evaporator and said condenser for permitting only the vapors from said evaporator to enter said condenser;

a condenser conduit connected to said condenser for providing a barometric leg for the removal of condensed desalinated water from the lower pressure in said condenser to the higher pressure of the atmospheric air;

a condensate water output valve located in said barometric leg for recovering the condensed desalinated ocean water therefrom;

a liquid level control means to sense the level of the condensed desalinated ocean water in the barometric leg for controlling said condenser water output valve to maintain a desired level of condensed desalinated ocean water;

a vacuum pump in fluid communication with said third conduit for initially reducing the internal vapor pressure in said evaporator for initiating operation of the apparatus;

an electrical generator coupled to said prime mover for generating electrical power; and

an electrical control system for connecting said electrical power for controlling said pumps and said valve.

5. An apparatus as set forth in claim 4, wherein said means permitting only the vapors from said evaporator to enter said condenser comprises a region having a greater cross-sectional area than said third conduit.

6. An apparatus for desalinating ocean waters and furnishing electrical power, comprising in combination:

an evaporator;

a first conduit for connecting said evaporator to the warm surface water of the ocean;

said first conduit forming a barometric leg to separate the low internal pressure of the evaporator from the ambient atmospheric pressure during operation of said evaporator;

pump means for circulating the warm surface ocean water to replace the heat of vaporization lost in the evaporator;

a closed condenser means connected by a second conduit to cool ocean water;

pump means interposed in said second conduit for circulating cool ocean water through said condenser cooling means to cool the vapors evaporated from said evaporator;

said closed condenser enabling heat exchange between the vapors from said evaporator and said cool ocean water in said condenser cooling means while isolating the vapors from the cool ocean water to prevent contamination of the condensed desalinated ocean water by the cool ocean water;

a third conduit connecting said evaporator to said condenser for directing evaporator vapors into thermal contact with said condenser cooling means;

a prime mover interposed in said third conduit to be driven by the mass flow of vapors between said evaporator and said condenser resulting from the pressure differential between the saturated vapors in said evaporator and the saturated vapors in said condenser;

a particle separation channel interposed between said evaporator and said condenser for reducing the velocity of vapors from said evaporator to prevent non-vapors from entering said condenser;

a condenser conduit connected to said condenser for providing a barometric leg for the removal of condensed desalinated water from the low pressure in said condenser to the higher pressure of the atmospheric air;

means located in said barometric leg of said condenser conduit for recovering the condensed desalinated ocean water therefrom at a controlled rate to maintain a selected range of head pressure;

a vacuum pump in fluid communication with said third conduit for initially reducing the internal vapor pressure in said evaporator for initiating operation of the apparatus;

an electrical generator coupled to said prime mover for generating electrical power; and

an electrical control system for connecting said electrical power for controlling said pumps and said valve.