System for comprehensive utilization of concentrated seawater by using solar pond

Abstract

The invention relates to a system for comprehensive utilization of concentrated seawater by using a solar pond. The system comprises a solar pond part and a seawater desalination part, wherein the concentrated seawater is conveyed to the solar pond part, and the seawater desalination part desalinates seawater by adopting a distillation method; the seawater in the solar pond part is subjected to salt gradient exchange for 1-2 months, then the seawater of a lower convection layer is introduced into a bottom heat exchanger, the bottom heat exchanger performs heat exchange with the seawater desalination part, and fresh water obtained by the seawater desalination part is respectively injected into a fresh water pond and an upper convection layer of the solar pond. The solar pond is combined with the seawater desalination part to realize effective utilization of the energy source of the solar pond, so that an energy source for distillation method seawater desalination is provided, the cost for seawater desalination is reduced, the fresh water and concentrated seawater passing through the seawater desalination part are treated and then can be used as supplemental water of the solar pond and a water supply for salt industry production, the effective utilization of energy and water resources is realized to the utmost extent, and the running cost of the system is reduced.

Description

technical field

[0001] The invention relates to the field of desalination of seawater, in particular to an environment-friendly, cost-reducing, and recyclable solar pond concentrated seawater comprehensive utilization system.

[0002] Background technique

[0003] With the development of my country's economy and society, the lack of fresh water resources has become one of the important factors restricting the development of coastal economy. Seawater desalination technology has become an important means to solve the shortage of freshwater resources in my country's coastal areas. While the scale of seawater desalination projects continues to increase, The discharge of its concentrated seawater has always been the focus of social attention. At present, in addition to a few domestic seawater desalination projects that have comprehensive utilization of concentrated seawater, most of the seawater desalination plants directly discharge the concentrated seawater, which will have...

Examples

Embodiment 1

[0037] First, the pressure is reduced to 10Kpa by the vacuum pump 1, and then the concentrated seawater obtained by the existing seawater desalination system is pumped into the condenser 2. After heat exchange, the concentrated seawater enters the spray device 5, and the sprayed concentrated seawater is in the evaporator 6 The outer surface of the pipe evaporates from the top to the falling film, and the water vapor passes through the steam-water separator 4 and contacts the condenser 2 during the rising process, and condenses into fresh water. The condensed fresh water is collected by the fresh water collection device 3 and then enters the fresh water pool 8; The evaporated seawater becomes further concentrated concentrated seawater into the concentrated seawater pool, and is pumped to the salt pan for solar salt production.

[0038] Construction of the solar pool: the pool structure of the solar pool part is in the shape of an inverted quadrangular truss, the bottom and the s...

Embodiment 2

[0042] First, the pressure is reduced to 17kPa by the vacuum pump 1, and then the concentrated seawater obtained by the existing seawater desalination system is pumped into the condenser 2. After heat exchange, the concentrated seawater enters the spray device 5, and the sprayed concentrated seawater is in the evaporator 6 The outer surface of the pipe evaporates from the top to the falling film, and the water vapor passes through the steam-water separator 4 and contacts the condenser 2 during the rising process, and condenses into fresh water. The condensed fresh water is collected by the fresh water collection device 3 and then enters the fresh water pool 8; The evaporated seawater becomes further concentrated concentrated seawater into the concentrated seawater pool, and is pumped to the salt pan for solar salt production.

[0043] Construction of the solar pool: the pool structure of the solar pool part is in the shape of an inverted quadrangular truss, the bottom and the s...

Embodiment 3

[0047] First, the pressure is reduced to 20kPa by the vacuum pump 1, and then the concentrated seawater obtained by the existing seawater desalination system is pumped into the condenser 2. After heat exchange, the concentrated seawater enters the spray device 5, and the sprayed concentrated seawater is in the evaporator 6 The outer surface of the pipe evaporates from the top to the falling film, and the water vapor passes through the steam-water separator 4 and contacts the condenser 2 during the rising process, and condenses into fresh water. The condensed fresh water is collected by the fresh water collection device 3 and then enters the fresh water pool 8; The evaporated seawater becomes further concentrated concentrated seawater, enters the concentrated seawater pool, and is pumped to the salt pan for solar salt production.

[0048] The construction of the solar pool: the pool structure of the solar pool part is in the shape of an inverted square prism, the bottom and the ...

technical field

[0001] The invention relates to the field of desalination of seawater, in particular to an environment-friendly, cost-reducing, and recyclable solar pond concentrated seawater comprehensive utilization system.

[0002] Background technique

[0003] With the development of my country's economy and society, the lack of fresh water resources has become one of the important factors restricting the development of coastal economy. Seawater desalination technology has become an important means to solve the shortage of freshwater resources in my country's coastal areas. While the scale of seawater desalination projects continues to increase, The discharge of its concentrated seawater has always been the focus of social attention. At present, in addition to a few domestic seawater desalination projects that have comprehensive utilization of concentrated seawater, most of the seawater desalination plants directly discharge the concentrated seawater, which will have...

Examples

Embodiment 1

[0037] First, the pressure is reduced to 10Kpa by the vacuum pump 1, and then the concentrated seawater obtained by the existing seawater desalination system is pumped into the condenser 2. After heat exchange, the concentrated seawater enters the spray device 5, and the sprayed concentrated seawater is in the evaporator 6 The outer surface of the pipe evaporates from the top to the falling film, and the water vapor passes through the steam-water separator 4 and contacts the condenser 2 during the rising process, and condenses into fresh water. The condensed fresh water is collected by the fresh water collection device 3 and then enters the fresh water pool 8; The evaporated seawater becomes further concentrated concentrated seawater into the concentrated seawater pool, and is pumped to the salt pan for solar salt production.

[0038] Construction of the solar pool: the pool structure of the solar pool part is in the shape of an inverted quadrangular truss, the bottom and the s...

Embodiment 2

[0042] First, the pressure is reduced to 17kPa by the vacuum pump 1, and then the concentrated seawater obtained by the existing seawater desalination system is pumped into the condenser 2. After heat exchange, the concentrated seawater enters the spray device 5, and the sprayed concentrated seawater is in the evaporator 6 The outer surface of the pipe evaporates from the top to the falling film, and the water vapor passes through the steam-water separator 4 and contacts the condenser 2 during the rising process, and condenses into fresh water. The condensed fresh water is collected by the fresh water collection device 3 and then enters the fresh water pool 8; The evaporated seawater becomes further concentrated concentrated seawater into the concentrated seawater pool, and is pumped to the salt pan for solar salt production.

[0043] Construction of the solar pool: the pool structure of the solar pool part is in the shape of an inverted quadrangular truss, the bottom and the s...

Embodiment 3

[0047] First, the pressure is reduced to 20kPa by the vacuum pump 1, and then the concentrated seawater obtained by the existing seawater desalination system is pumped into the condenser 2. After heat exchange, the concentrated seawater enters the spray device 5, and the sprayed concentrated seawater is in the evaporator 6 The outer surface of the pipe evaporates from the top to the falling film, and the water vapor passes through the steam-water separator 4 and contacts the condenser 2 during the rising process, and condenses into fresh water. The condensed fresh water is collected by the fresh water collection device 3 and then enters the fresh water pool 8; The evaporated seawater becomes further concentrated concentrated seawater, enters the concentrated seawater pool, and is pumped to the salt pan for solar salt production.

[0048] The construction of the solar pool: the pool structure of the solar pool part is in the shape of an inverted square prism, the bottom and the ...

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