Solar energy auxiliary reverse osmosis water treatment process and apparatus

Abstract

The invention discloses a solar-assisted reverse osmosis water treatment method, which comprises the following steps that: raw water is pretreated, then enters a solar thermal collector to be heated to a temperature of between 35 and 45 DEG C, and then is subject to reverse osmosis treatment through a high pressure pump under a pressure of between 1 and 1.3MPa. A solar-assisted reverse osmosis water treatment device consists of a raw water pretreatment system, and a high-pressure water pump and a reverse osmosis module which are orderly connected in series. The device is characterized in that: the solar thermal collector and a heat insulating water tank are serially connected between the raw water pretreatment system and the high-pressure water pump. The solar thermal collector and the heat insulating water tank heat pretreated water and maintain the temperature to be between 35 and 45 DEG C, and the high-pressure water pump controls the operation pressure to be between 1 and 1.3MPa. The method and the device utilize solar energy to improve the water inlet temperature of a reverse osmosis membrane, and reduce reverse osmosis operation pressure and power consumption under the condition of not reducing water yield; and the operation pressure is reduced, pipelines and valves of a system have smaller pressure bearing, the pressure-resistance requirement to materials is lower, so the manufacturing cost of equipment and the possibility of water leakage phenomenon during the operation of the equipment can be reduced.

Description

technical field [0001] The invention relates to a reverse osmosis water treatment technology, in particular to a solar-assisted reverse osmosis water treatment method and device Background technique [0002] As an advanced water treatment technology, reverse osmosis is widely used in desalination of seawater, softening and desalination of boiler feed water, and production of pharmaceutical purified water and drinking bottled water. At present, the operating pressure of the pump in the reverse osmosis system is very high, usually above 1.8Mpa, and the power consumption is relatively large. Therefore, it is of great significance to reduce the energy consumption of reverse osmosis. [0003] The Chinese patent with the patent number CN1721047 discloses an energy-saving reverse osmosis treatment system, which uses the high-pressure operating conditions of the reverse osmosis treatment system itself to fully recover and utilize the residual pressure energy of the reverse osmosis c...

AI Technical Summary

Problems solved by technology

[0006] The Chinese patent No. CN02281876.6 published in 2003 researched a solar reverse osmosis seawater desalination equipment, using solar energy to generate steam to directly drive the turbo pump to provide the inflow flow and pressure of the reverse osmosis components. Reverse osmosis seawater desalination equipment requires a large solar collector to generate steam that directly drives the turbopump, which occupies a large area and requires a large investment. It is difficult to operate in rainy days, and its practical application is limited.

This kind of solar reverse osmosis water purifier system is complex, with many moving parts, many places that need to be sealed, and it is prone to leakage, so it is difficult to be practically applied

In addition, the membrane modules use fiber membranes, and most of the actual applications of reverse osmosis use roll-type membranes, which are not very practical

Difficult to operate on rainy days is also a disadvantage of the system

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