TH15933Y - A desalination system using a vacuum membrane filter with a circulating moisture mechanism. - Google Patents

Abstract

Page 1 of 1 page Summary of the Invention The vacuum recirculating membrane distillation system for seawater is a closed system consisting of a boiler (1) that heats seawater to a temperature of 30 - 50 degrees Celsius ((symbol)C), and the heated seawater flows through a membrane module (2) inside which a membrane (2) is placed in the center of the membrane module (3). A vacuum pump (6) draws air into the distillation chamber (4) and distillation chamber (7), and cooling water, with a temperature in the range of 10 - 30 degrees Celsius ((symbol)C), from the cooling system (5) is used to condense the vapor of the heated seawater into fresh water, which is placed in containers (8) and (9). The remaining vapor of the heated seawater in the distillation chamber (7) is pushed back into the membrane module (3) at the inside of the membrane (2), and the vapor of the heated seawater is condensed again. It is characterized by air with a relative humidity of 85 - 95 percent of the total moisture content, which causes the temperature inside the membrane (2) to decrease, creating a temperature difference at the membrane surface (2), allowing vapor molecules to pass through the membrane (2) to the distillation chamber efficiently, leading to a higher fresh water production rate. Therefore, it is a system that can greatly improve the efficiency of the vacuum membrane distillation (VMD) process.

Claims (1)

Page 1 of 1 page. Claims 1. The seawater desalination system with vacuum membrane filtration and moisture circulation consists of a closed system with a boiler (1) that heats seawater to a temperature of 30 - 50 degrees Celsius ((symbol)C), and the heated seawater flows through a membrane module (3) in which a membrane (2) is placed in the center of the membrane module (3). A vacuum pump (6) draws air into the distillation chamber (4) and the distillation chamber (7), and cooling water with a temperature in the range of 10 - 30 degrees Celsius ((symbol)C) from the cooling system (5) is used to condense the vapor of the heated seawater into fresh water. It has the following characteristics: a membrane (2) which is a polymer (Polymer) with hydrophobic properties, a contact angle to show hydrophobicity of 124.3 degrees, a surface area of 0.03 square meters (m2), a pore size of 0.014 micrometers ((symbol)), and a porosity (porosity, (symbol)) of 67.42 percent of the volume of voids in the porous material. The vapor of boiled seawater flows through the pores of the membrane (2) into the membrane (2), while the remaining boiled seawater flows out of the membrane module (3) back into the boiler (1) and flows through the membrane module (3) again, and a vacuum pump (6) draws air into the distillation chamber (4) and distillation chamber (7) with a pressure of 10 - 50 kilopascals (KPa). The vapor of boiled seawater The remaining boiled seawater vapor in the distillation chamber (4) is drawn to the distillation chamber (7) to condense into fresh water, which is then placed in container (8). The remaining boiled seawater vapor in the distillation chamber (7) is pushed back into the membrane module (3) at the inside of membrane (2). The boiled seawater vapor is in the form of air with a relative humidity of 85-95% of the total moisture content.