Multistage double effect distillation seawater desalination technology with heating seawater by solar energy

A solar energy, heating technology, applied in seawater treatment, water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as large fuel consumption or power consumption

Inactive Publication Date: 2011-09-21
孙元新
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, conventional seawater desalination methods include distillation, ion exchange, dialysis, reverse osmosis membrane, etc., all of which consume a lot of fuel or electricity

Method used

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  • Multistage double effect distillation seawater desalination technology with heating seawater by solar energy
  • Multistage double effect distillation seawater desalination technology with heating seawater by solar energy
  • Multistage double effect distillation seawater desalination technology with heating seawater by solar energy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] figure 1 It is a system diagram of the present invention, and it is a specific embodiment of the process. The process is as follows: seawater is transported to the high-level water tank (2) through the seawater pump (1), and the seawater in the high-level water tank (2) is transferred by the circulation pump (12). Water is supplied to the system through the water supply pipe (16) and the condenser water inlet pipe (3), and the seawater is heated to a certain temperature after absorbing the steam latent heat in the double-effect evaporators (4) at all levels through the condensers (6) of the system at all levels, and then Enter the solar fast heater (18), enter in the evaporation chamber (8) of the double-effect evaporator (4) after being heated to the design temperature again through the solar heating tube (19), because the pressure in the evaporation chamber (8) passes through the vacuum pump ( 21) and the exhaust pipe (14) are controlled below the saturated vapor pres...

Embodiment 2

[0025] Figure 2 to Figure 5 is the system figure 1The structural diagram of the middle double-effect evaporator (4) is a specific embodiment of the present invention, and its technological process is: seawater enters from the condenser water inlet pipe (15) under the effect of the circulating pump, and the condenser (3) After internally absorbing the latent heat of steam in the evaporation chamber (16), it enters the next-stage double-effect evaporator through the water outlet pipe at the other end of the condenser (3). After the multi-stage double-effect evaporator absorbs latent heat, it enters the solar rapid heater to continue heating. The hot seawater heated to the design temperature enters the evaporation chamber (16) through the double-effect evaporator water inlet pipe (8). The pressure of the seawater is controlled below the saturated vapor pressure corresponding to the temperature of the hot seawater. After the hot seawater enters the evaporation chamber (16), it b...

Embodiment 3

[0027] Figure 6 to Figure 11 is the system figure 1 The structural diagram of solar energy fast heater (18) is a kind of concrete embodiment of the present invention, and its technological process is as follows: the seawater that absorbs latent heat of vaporization and is heated to certain temperature through multi-stage condenser, by water inlet pipe (12) Enter the solar rapid heater water inlet tank (11), and flow to the water outlet tank (2) through the gap between the heat absorption pipe (7) and the heat pipe (8). The heat-absorbing pipe (7) is made of corrosion-resistant metal material, and the surface is coated with a selective heat-absorbing film. The heat-preserving pipe (6) adopts a through-type tubular double-layer vacuum transparent glass tube, and the heat-absorbing pipe (7) is set in the heat-preserving pipe (6) Inside, both ends are sealed. The heat pipe (8) is a tube-shaped airtight container with both ends sealed, and a liquid heat-conducting medium and a h...

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Abstract

The invention relates to a multistage double effect distillation seawater desalination technology with heating seawater by solar energy. The technology comprises the following steps: seawater is delivered to a high cistern by a seawater pump; the seawater in the high cistern is delivered to a system for water supply through a water supply tube and a condenser inlet tube; the seawater is heated to a certain temperature by adsorbing latent heat of steam in an evaporator through all condensers of the system, and enters the evaporator after being heated to a designed temperature by a rapid heater with solar energy; the seawater enters the evaporator, becomes superheated water and is gasified rapidly and partially because a pressure in the evaporator is controlled to be lower than a saturation vapor pressure corresponding to a temperature of hot seawater; and a part of ungasified hot seawater enters a next stage evaporator and a part enters heat-collecting tubes at two sides of the evaporator. The heat-collecting tubes are provided with annular imbibition films, and the hot seawater flows from top to bottom after entering the heat-collecting tubes. In a flow process, the hot seawater is delivered to upper half parts of inner cavities of the heat-collecting tubes because of capillary imbibition actions of the imbibition films. The hot seawater is evaporated to steam because the heat-collecting tubes have a high temperature under the sunlight, the steam rises along the inner cavities of the heat-collecting tubes and enters the condenser to obtain fresh water which flows into a fresh water tank and then is output by a fresh water tube. Unevaporated concentrated seawater enters a concentrated water tank and is ouput by an inlet/outlet tube.

Description

A technical field [0001] The invention provides a multi-stage double-effect seawater desalination process using solar energy to directly heat seawater, multi-stage double-effect evaporator low-pressure, low-temperature flash evaporation and solar collector tube distillation, which belongs to solar energy utilization and seawater desalination technology. Two technical background [0002] At present, conventional seawater desalination methods include distillation, ion exchange, dialysis, reverse osmosis membrane, etc., all of which consume a large amount of fuel or electricity. For example, the multi-stage flash seawater desalination equipment in the distillation method uses steam to heat the seawater, so that the hot seawater flashes and condenses in the evaporator to produce fresh water. It takes more than 40,000 calories of steam to produce one ton of fresh water. At present, all energy-consuming seawater desalination equipment in the world consumes 300 to 400 million tons ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/14C02F103/08
CPCY02A20/124Y02A20/141Y02A20/142Y02A20/212
Inventor 孙元新王汝敬
Owner 孙元新
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