CN211310918U

CN211310918U - Seawater desalination, power generation and heat recovery integrated device based on solar energy

Info

Publication number: CN211310918U
Application number: CN201921593931.1U
Authority: CN
Inventors: 张梦; 屈健; 商璐; 曹程; 应鑫睿
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-08-21
Anticipated expiration: 2029-09-24

Abstract

The utility model discloses a solar-based seawater desalination, power generation and heat recovery integrated device, which comprises a solar evaporator, wherein a steam outlet of the solar evaporator is connected with a steam collecting cavity, and a thermoelectric module is arranged on the wall surface of the steam collecting cavity; a condensing pipe is arranged at the bottom of the steam collecting cavity, the condensing pipe is arranged in the waste heat recovery unit, and a heat exchange pipeline is wound along the outer wall of the condensing pipe in the waste heat recovery unit; the utility model discloses a solar energy distillation method has power generation and heat recovery function concurrently when realizing seawater desalination, realizes the multistage utilization of seawater desalination in-process energy.

Description

Seawater desalination, power generation and heat recovery integrated device based on solar energy

Technical Field

The utility model belongs to the technical field of solar energy sea water desalination and multistage energy utilization, a collection sea water desalination, electricity generation and heat recovery integrated device based on solar energy.

Background

At present, a plurality of methods for seawater desalination, such as conventional distillation methods, reverse osmosis membrane methods, dialysis methods and the like, are available, but these methods all need to consume a large amount of fuel or electric power, and face the problems of fossil energy shortage and environmental pollution easily caused in the use process, so that the rapid development of novel environment-friendly seawater desalination technology becomes the current urgent need.

Solar seawater desalination by solar distillation is one of the important methods, and the operation is basically that seawater absorbs solar energy, and fresh water is obtained by condensation after rapid evaporation. The method does not consume conventional energy, has simple structure and easy operation, and is very suitable for being used in some coastal remote areas with sufficient sunlight and lack of power and electric energy.

However, most of the related devices are not high in the overall utilization rate of solar energy, and a multistage comprehensive utilization device which has other functions while realizing seawater desalination by a solar distillation method is rarely reported, so that how to realize the multistage utilization of energy in the whole seawater desalination process is very important.

SUMMERY OF THE UTILITY MODEL

In order to solve the deficiencies in the prior art, the utility model provides a collection sea water desalination, electricity generation and heat recovery integrated device based on solar energy realizes the multistage utilization of energy of whole sea water desalination process.

The utility model discloses the technical scheme who adopts as follows:

a seawater desalination, power generation and heat recovery integrated device based on solar energy comprises a solar evaporator, wherein a steam outlet of the solar evaporator is connected with a steam collecting cavity, and a thermoelectric module is arranged on the wall surface of the steam collecting cavity; the bottom of the steam collecting cavity is provided with a condensing pipe, the condensing pipe is arranged in the waste heat recovery unit, and a heat exchange pipeline is wound along the outer wall of the condensing pipe in the waste heat recovery unit;

furthermore, a membrane distillation assembly (MD membrane) is arranged at the joint of the steam outlet of the solar evaporator and the steam collection cavity, so that the steam can enter the steam collection cavity as long as the two sides of the membrane maintain proper temperature difference without heating the solution to a boiling point;

furthermore, the connection part of the bottom of the steam collecting cavity and the condensing pipe is in a bucket shape, and an axial flow fan is arranged at the upper part of the bucket shape;

further, the waste heat recovery unit comprises an insulating layer and fillers in the insulating layer;

further, the filler adopts paraffin;

further, the solar evaporator comprises a vacuum heat collecting pipe and a groove type light condensing device positioned at the lower part of the vacuum heat collecting pipe;

furthermore, the thermoelectric module is a thermoelectric generator, a thermoelectric cold side of the thermoelectric generator is attached to the top of the steam collection cavity, and a heat radiating fin is arranged at a thermoelectric hot side of the thermoelectric generator.

The utility model has the advantages that:

1. the utility model discloses a solar energy sea water desalination-electricity generation-heat recovery integrated device adopts the mode that vacuum glass pipe and slot type spotlight combined together to form spotlight vacuum tube solar evaporator heating sea water, and the thermal efficiency can reach 93.5%, realizes the high-efficient distillation of sea water to sea water desalination's water yield has been improved. Under 5 times of light condensation, the highest fresh water yield of the product can reach 5.55 kg/(m)²·h)。

2. The utility model discloses a solar energy sea water desalination-electricity generation-heat recovery integrated device utilizes the outside steam collection chamber of taking the temperature difference power generation unit, carries out recycle to steam condensation latent heat, and the wall temperature that will release the condensation latent heat and arouse turns into the electric energy with the difference in temperature that ambient temperature formed, realizes the make full use of energy.

3. The utility model discloses a solar energy sea water desalination-electricity generation-heat recovery integrated device's steam condenses and heat recovery unit utilizes paraffin recovery condensation latent heat to realize the recycle once more of waste heat, can be used to other aspects at night.

4. The solar seawater desalination-power generation-heat recovery integrated device has simple structure, wide application range and closely related functions to production and life.

Drawings

FIG. 1 is a sectional view of the structure of the present invention;

FIG. 2 is a schematic view of the installation of the power generation module of the present invention;

in the figure, the solar heat-insulation solar water heater comprises a heat-insulation layer 1, a heat-insulation layer 2, a filler 3, a cold water inlet 4, an axial flow fan 5, a steam collection cavity 6, a thermoelectric module 7, a radiating fin 8, an MD membrane 9, a seawater injection port 10, a solar evaporator 11, a hot water outlet 12, a fresh water outlet 13, a waste heat recovery unit 14, a frame body 15, a condenser pipe 16 and a heat exchange pipeline.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

As shown in fig. 1, the integrated device for seawater desalination, power generation and heat recovery based on solar energy comprises a solar evaporator 10, wherein the solar evaporator 10 comprises a vacuum heat collecting tube and a groove type light gathering device positioned at the lower part of the vacuum heat collecting tube; a steam outlet of the solar evaporator 10 is connected with the steam collecting cavity 5, a membrane distillation assembly (MD membrane) 8 is arranged at the joint of the steam outlet and the steam collecting cavity 5, the solution is not required to be heated to a boiling point, and the steam can enter the steam collecting cavity as long as the two sides of the membrane maintain proper temperature difference; as shown in fig. 2, thermoelectric modules 6 are arranged on the top and the side of the steam collection cavity 5, the thermoelectric modules 6 are thermoelectric generators, thermoelectric cold sides of the thermoelectric generators are attached to the top and the side of the steam collection cavity 5, and heat dissipation fins 7 are arranged on the thermoelectric hot sides.

The bottom of the steam collection cavity 5 is provided with a condensation pipe 15, the joint of the bottom of the steam collection cavity 5 and the condensation pipe 15 is bucket-shaped, and the upper part of the bucket-shaped is provided with an axial flow fan 4. The condenser pipe 15 is arranged in the waste heat recovery unit 13, the waste heat recovery unit 13 comprises a heat insulation layer 1 and paraffin filler 2 in the heat insulation layer 1, and a heat exchange pipeline 16 is wound in the waste heat recovery unit 13 along the outer wall of the condenser pipe 15. The waste heat recovery unit 13 is fixedly installed through the frame body 14.

The working process of the device is as follows: seawater after filtration and impurity removal is injected into the vacuum heat collecting tube from a seawater injection port 9 of a solar evaporator 10, the seawater in the vacuum heat collecting tube is quickly and efficiently evaporated under the condensing heating of a groove type condensing device (condensing ratio is 3-5 times), steam formed by evaporation enters a steam collecting cavity 5, and the steam is introduced by an axial flow fan 4 at the bottom and enters a waste heat recovery unit 13 from a condensing tube 15; the steam is discharged from the fresh water outlet 12 after being released and condensed into liquid water in the condensing pipe 15 to obtain desalinated domestic water; meanwhile, the latent heat released by the steam in the condensation pipe 15 is absorbed and stored by the paraffin filler 2; when the sunshine is sufficient in the daytime, the evaporation and condensation processes are continuously carried out, the paraffin filler 2 also continuously absorbs and stores heat, at night, the evaporation and condensation are stopped, and after the paraffin filler 2 releases the absorbed heat, domestic water (cold water) is input from a cold water inlet of the heat exchange pipeline 16, absorbs the heat in the waste heat recovery unit 13, and then the domestic water is discharged from a hot water outlet 11 for domestic use.

The heat that the high temperature steam that produces in the evaporation process in daytime released at steam collection chamber 5 makes steam collection chamber 5 outer wall temperature rise to make and form certain difference in temperature between wall and the external environment. The thermoelectric module 6 on the steam collection cavity 5 can generate electricity under the action of temperature difference.

The above embodiments are only used for illustrating the design ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, and the protection scope of the present invention is not limited to the above embodiments. Therefore, all the equivalent changes or modifications made according to the principles and design ideas disclosed by the present invention are within the protection scope of the present invention.

Claims

1. A solar-based seawater desalination, power generation and heat recovery integrated device is characterized by comprising a solar evaporator (10), wherein a steam outlet of the solar evaporator (10) is connected with a steam collecting cavity (5), and a thermoelectric module (6) is arranged on the wall surface of the steam collecting cavity (5); the bottom of cavity (5) is collected to steam is equipped with condenser pipe (15), in waste heat recovery unit (13) was arranged in condenser pipe (15), and in waste heat recovery unit (13) along condenser pipe (15) outer wall winding there is heat transfer pipeline (16).

2. The integrated device for seawater desalination, power generation and heat recovery based on solar energy as claimed in claim 1, wherein the connection of the steam outlet of the solar evaporator (10) and the steam collection chamber (5) is provided with a membrane distillation assembly 8.

3. The integrated device for seawater desalination, power generation and heat recovery based on solar energy as claimed in claim 2, wherein the connection between the bottom of the steam collection chamber (5) and the condensation pipe (15) is bucket-shaped, and the upper part of the bucket-shaped is provided with the axial flow fan (4).

4. The integrated device for seawater desalination, power generation and heat recovery based on solar energy as claimed in claim 1, wherein the waste heat recovery unit (13) comprises an insulating layer (1) and a filler (2) in the insulating layer (1).

5. The integrated solar-based seawater desalination, power generation and heat recovery device as claimed in claim 4, wherein the filler (2) is paraffin.

6. The integrated device for seawater desalination, power generation and heat recovery based on solar energy as claimed in claim 1, wherein the solar evaporator (10) comprises evacuated solar collector tubes and trough type light-gathering devices located at the lower parts of the evacuated solar collector tubes.

7. The integrated device for seawater desalination, power generation and heat recovery based on solar energy as claimed in claim 1, wherein the thermoelectric module (6) is a thermoelectric generator, the thermoelectric cold side of the thermoelectric generator is attached to the wall of the top of the steam collection chamber (5), and the thermoelectric hot side is provided with a heat sink (7).