JPS5853684A - Power generating method utilizing penetration pressure - Google Patents

Abstract

PURPOSE:To generate electrocity by contacintg sea water with plain water through a penetration film provided in a pressure tank. CONSTITUTION:The plain water Q1 drawn through the intake port 1 of a river R is precipitated, filtered, and guided into a pressure tank 3, and the sea water Q2 with the same amount as the plain water Q1 is sealed in the tank 3 to keep the sea water density in the pressure tank 3 constant. Then, the sea water is contacted with the plain water through a penetration film 4 provided in the tank 3. Theregby, a penetration pressure is generated in the tank 3, and the pressure water rotates a water turbine 6 to generate electricity through a generator 7.

Description

[Detailed description of the invention] The present invention relates to a power generation method using osmotic pressure.

The osmotic pressure phenomenon that exists in liquids of different concentrations is widely known.

Figure 1 (a), (b), and (c) show the principles of osmosis and reverse osmosis phenomena. When fresh water a and saline water are poured on both sides of the semipermeable go boundary, fresh water This causes a difference in the height of the water level on both sides of the semipermeable membrane, and when the water level difference reaches a certain value, fresh water stops moving. The pressure corresponding to the difference in the water surface at this time is the osmotic pressure P1 of the saline solution (immersion a′IA elephant mouth)0 Also, if a pressure higher than the osmotic pressure P1 is applied to the saline side,
Conversely, the water in saline passes through a semipermeable membrane and moves to the fresh water side (reverse osmosis phenomenon c). Among these, reverse osmosis is a so-called reverse osmosis method used for desalination of salt water and production of sterile water for pharmaceutical use. It is widely used for separating various salts and organic substances from factory waste liquids, and recovering valuable materials.

However, until now, no significant industrial application has been made regarding the osmosis phenomenon.

The present invention aims to introduce fresh water from a river at an estuary, sea water from the sea, and generate electricity by using an osmotic pressure generated between the sea water and fresh water via an osmotic membrane.

By the way, there is a distance of about 2 between seawater and freshwater at 25'a.
Although an osmotic pressure of 5 kg/cm2 is obtained, the osmotic pressure decreases as freshwater permeates into seawater. Therefore, according to the present invention, by continuously replenishing a small amount of seawater, the concentration of seawater is prevented from decreasing below a certain value due to the infiltration of freshwater.

Embodiments of the method of the present invention will be described below with reference to the drawings.

In the drawings, R indicates a river and B indicates the sea, and ql of fresh water is taken from a water intake 1 provided in a river R, and is introduced into a sedimentation tank 2 for sedimentation and filtration, and then introduced into a pressure tank 3. In addition, in order to keep the seawater** in the pressure tank 3 constant, the pressure tank 3 is filled with 1 t of fresh water GL1 and the same seawater Q2 by the seawater pump 5.

By bringing the translated book into contact with seawater through the permeable membrane 4 provided in the pressure tank 3, the voltage inside the pressure tank 3 is reduced to H=12.
An osmotic pressure of 0 c:m occurs, for example freshwater Q1: 1 m3
/B, seawater Q2 = 1 m”/s, then Qi =
Pressure water of GLt+Q2 = 2 m''/H passes through the water wheel 6, rotates it, and generates power Ia7.

If this is converted into electrical energy, it will be T1, and approximately 1 kW of electricity will be generated.

Power generation output P4 = 2';/B x 100m
&S = 2040 kw5o, tP2-=it
/B X 111011 X e, tax ir=1
77kw Actual electrical energy P””PI-12 = 88-3k or more d
As explained above, the present invention utilizes the flow of a river and the osmotic pressure between freshwater and seawater to generate electricity, and can contribute to the development of new energy. .

[Brief explanation of the drawing]

Figures 1 (A), ←), and (C) are explanatory diagrams explaining the principles of osmosis and reverse osmosis phenomena. FIGS. 2 and 3 show an embodiment of the power generation method of the present invention, with FIG. 2 being a plan view and FIG. 3 being a longitudinal sectional view. R...For Sakagawa River S...Koumi l...Water intake 2
e-war/sedimentation tank 3...O pressure tank 400. Penetration J!
i 5-, seawater pump 6... water wheel 7...
Generator

Claims (1)

[Claims] At the estuary, fresh water is brought in from the river, sea water is brought in from the sea, and the sea water and fresh water are brought into contact through an osmotic membrane, and the fresh water permeates into the sea water, creating a high-pressure water flow that rotates a water wheel to generate electricity. A power generation method using osmotic pressure characterized by: