Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Continuous salinity gradient power generation device and method

A power generation device and salt difference technology, applied in the field of continuous salt difference power generation device, can solve the problems of increasing process complexity and power generation cost, device operation stability, adverse impact of input cost, large amount of salt and fresh water supply, etc.

Active Publication Date: 2021-04-27
HANGZHOU WATER TREATMENT TECH DEV CENT
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reverse electrodialysis salt difference power generation technology still has technical problems such as low power generation efficiency, large salt and fresh water supply, and high energy consumption for continuous power generation.
At present, some researchers have proposed to use special ion exchange membranes or salt solutions to improve power generation efficiency, but it will have adverse effects on device operation stability, input costs, etc.
In addition, some researchers have proposed to recycle salt liquid through waste heat and other evaporation methods to achieve the purpose of closed power generation, but gas-liquid separation, heat exchange, etc. increase process complexity and power generation costs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Continuous salinity gradient power generation device and method
  • Continuous salinity gradient power generation device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] combine figure 1 and figure 2 As shown, the ion exchange membrane resistance of the reverse electrodialyzer 12 is 2 Ω·cm 2 , the membrane surface flow rate is 4.5 cm / s; the forward osmosis membrane of the forward osmosis device 13 is a hollow fiber membrane with a composite functional layer of silicon oxide nanoparticles, and the flow rate of the feed liquid is twice the flow rate of the draw liquid; the salt in the concentrated salt solution tank 14 Liquid is 10% sodium chloride solution, and the salt solution of light salt solution tank 15 is 0.5% sodium chloride solution. The forward osmosis draw solution of the forward osmosis device 13 is 23% ammonium chloride solution. The anode 122 and cathode 121 were tested with a wire connected load with a power density of 7.2 W / m 2 .

Embodiment 2

[0052] combine figure 1 and figure 2 As shown, the ion exchange membrane resistance of the reverse electrodialyzer 12 is 2 Ω·cm 2 , the membrane surface flow rate is 4.5 cm / s; the forward osmosis membrane of the forward osmosis device 13 is a hollow fiber membrane with a composite functional layer of silicon oxide nanoparticles, and the flow rate of the feed liquid is 1.5 times of the flow rate of the draw liquid; the salt of the concentrated salt solution tank 14 Liquid is 5% sodium chloride solution, and the salt solution of light salt solution tank 15 is 0.3% sodium chloride solution. The forward osmosis draw solution of the forward osmosis device 13 is 20% ammonium bicarbonate solution. The anode 122 and cathode 121 were tested with a wire connected load with a power density of 5.6 W / m 2 .

Embodiment 3

[0054] combine figure 1 and figure 2 As shown, the ion exchange membrane resistance of the reverse electrodialyzer 12 is 2 Ω·cm 2 , the membrane surface flow rate is 5 cm / s; the forward osmosis membrane of the forward osmosis device 13 is a hollow fiber membrane with a composite functional layer of titanium oxide nanoparticles, and the flow rate of the feed liquid is twice the flow rate of the draw liquid; the salt of the concentrated salt solution tank 14 Liquid is 12% sodium chloride and sodium sulfate mixed solution, and the salt solution of light salt solution tank 15 is 0.3% sodium chloride and sodium sulfate mixed solution. The forward osmosis draw solution of the forward osmosis device 13 is 23% ammonium chloride solution. The anode 122 and the cathode 121 are tested by connecting the load with a wire, and the power density is 8.7W / m 2 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Power densityaaaaaaaaaa
Power densityaaaaaaaaaa
Power densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a continuous salinity gradient power generation device. The device comprises a dilution device, a reverse electrodialyzer, a forward osmosis device, a concentrated salt liquid tank and a light salt liquid tank; the concentrated salt solution tank contains a concentrated salt solution, the light salt solution tank contains a light salt solution, and the concentration of the concentrated salt solution is greater than that of the light salt solution; the reverse electrodialyzer is provided with a cathode and an anode, and a cation exchange membrane, an anion exchange membrane, a thick liquid chamber and a thin liquid chamber are alternately arranged between the cathode and the anode; a potential difference is formed between the cathode and the anode of the reverse electrodialyzer; the concentrated salt solution circulates between a concentrated solution chamber and a concentrated salt solution tank of the reverse electrodialyzer, the light salt solution circulates between a light solution chamber and a light salt solution tank of the reverse electrodialyzer, the dilution device provides a diluent to maintain the light salt solution at a low concentration, the forward osmosis device provides a concentration effect to maintain the concentrated salt solution at a high concentration, and part of the light salt solution is concentrated and then is used for supplementing the strong salt solution. The device disclosed by the invention can realize cyclic continuous power generation by utilizing the salt concentration difference and has the characteristic of high power generation efficiency.

Description

technical field [0001] The invention belongs to the technical field of chemical energy power generation, and in particular relates to a continuous salinity difference power generation device and method realized by reverse electrodialysis and forward osmosis membranes. Background technique [0002] With the rapid development of the global economy, people's demand for energy is increasing. Since mankind entered the electrical age, electric energy has become an important driving force for social development due to its advantages of being economical, clean, and easy to convert and control. It has been used in all aspects of human life. Traditional fossil fuel power generation has problems such as large consumption of non-renewable resources and serious environmental pollution. Hydropower generation and other new energy technologies are limited by factors such as natural environment conditions, regional adaptability, operational stability, and storage safety. Therefore, it is urg...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02N3/00
CPCH02N3/00
Inventor 祝海涛杨波吴雅琴
Owner HANGZHOU WATER TREATMENT TECH DEV CENT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com