Double cycle reverse osmosis device and reverse osmosis treatment method

Abstract

The invention relates to a dual-cycle reverse osmosis device and a reverse osmosis treatment method. The dual-cycle reverse osmosis device comprises a single-cycle water saving loop communicated with pipelines of an aftertreatment device and a supercharging device by a water inlet electromagnetic valve between a water inlet pipe and a thick water discharge outlet, wherein a loop is additionally arranged on the single-cycle water saving loop to form a dual-cycle water saving loop. The dual-cycle water saving loop consists of a first tee pipe, a second tee pipe, a third tee pipe, a fourth tee pipe, one-way valves, a one-way throttle valve and a pulse electromagnetic valve, wherein the first tee pipe and the second tee pipe are arranged between the water inlet electromagnetic valve and the supercharging device; the third tee pipe and the fourth tee pipe are arranged between a thick water opening of the aftertreatment device and the thick water discharge outlet and communicated with each other through a pipeline; the one-way valves limit water to only flow to a water inlet opening of the supercharging device and are respectively arranged between the first tee pipe and the fourth tee pipe as well as between the second tee pipe and the third tee pipe; the pulse electromagnetic valve is arranged between the third tee pipe and the fourth tee pipe; a throttling device is arranged between a water outlet of the pulse electromagnetic valve and the thick water discharge outlet.

Description

technical field [0001] The invention relates to a double-cycle reverse osmosis device and a reverse osmosis treatment method. Background technique [0002] CN200710124808.0 discloses a pure water machine and its working method. Its purpose is to provide a water-saving long-acting pure water machine with full-automatic flushing and double-membrane purification, and to ensure good quality of pure water and long service life of the filter element. The working method of the pure water machine. The technical solution: the pure water machine includes a water inlet, a water outlet, a filtering device arranged between the water inlet and the water outlet, a pre-processing device, a post-processing device, an automatic flushing device and a concentrated water discharge port, and an increasing pressure pump, the pre-treatment device is an ultrafiltration membrane filter, the post-treatment device is a reverse osmosis filter, and the filter device has an N-KDF filter element; Two sol...

AI Technical Summary

Problems solved by technology

Its disadvantages are: the single-cycle water-saving circuit and pulse technology are adopted, which only improves the utilization rate of raw water during the working cycle.

On the other hand, the ultrafiltration membrane is used as the pretreatment of the reverse osmosis membrane. Due to its high filtration accuracy, regular flushing is required to prevent its fouling, which also causes some waste of water resources. Secondly, the connection method of the pretreatment is series connection , that is, the tap water first passes through the ultrafiltration membrane filter and then enters the N-KDF filter element. If the ultrafiltration membrane filter is fouled, even if the N-KDF filter element has a filtering effect, no water will pass through, causing the reverse osmosis membrane due to the amount of flushing water. not enough to cause blockage

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