Adsorption type seawater desalination system with higher stability

Abstract

The invention discloses an adsorption type seawater desalination system with higher stability. The desalination system utilizes the situation that seawater is easily evaporated under low pressure andadsorption and desorption performance of a porous medium silica gel on water vapor to realize seawater desalination; and the desalination system comprises six subsystems including a hot-water system,a cooling-water system, a seawater supply device, a fresh-water collecting device, a heat recovery system and a steam system. According to the desalination system provided by the invention, on the basis of a conventional adsorption type seawater desalination principle, the desalination system is additionally provided with heat recovery cycle to reduce energy consumption, and is additionally provided with mass recovery cycle to fully exert adsorption and desorption performance of the silica gel; the desalination system adopts design of separation of evaporation and condensation processes, a gas-liquid mixture is separated through a separation chamber, so that adaptability of the system to change of external conditions is fully improved; and the whole system has no moving parts, and the produced fresh water has better quality and a wide range of applications.

Description

technical field [0001] The invention relates to the technical field of seawater desalination, in particular to the technical field of adsorption-type seawater desalination. Background technique [0002] Fresh water is a valuable resource necessary for the economic development of a country's agriculture, industry and various sectors. With the rapid development of society and the rapid growth of population, freshwater resources have presented a serious shortage of supply. Affected by urbanization, economic development and continuous improvement of living standards, the water crisis has become the second largest environmental problem in the world after global warming. At present, the most widely used seawater desalination methods in the world mainly fall into two categories: (1) thermal desalination, such as multi-effect distillation (MED), multi-stage flash (MSF), etc.; (2) membrane desalination, such as positive Osmosis (FO), Reverse Osmosis (RO), etc. Although the optimiz...

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Problems solved by technology

Although the optimization of the seawater desalination process has effectively reduced the desalination cost and increased the freshwater production capacity in recent years, there are still important problems in the traditional seawater desalination technology: (1) high-grade energy consumption and pollutant discharge; (2) membrane and Corrosion and clogging of mass exchangers; (3) High maintenance costs caused by corrosion of pipes or salt or fouling on the outer surface of heat exchangers

Although the device has an integrated design of the evaporator and condenser, which reduces the volume of the equipment and makes full use of the heat in the process, and adopts the heat recovery cycle to improve the energy utilization rate, but the system is to realize the evaporation and condensation process. Coupled operation, poor adaptability to hot and cold water flow and temperature fluctuations, can only operate under a single working condition

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