Reverse osmosis step sequence control method

Abstract

The invention provides a reverse osmosis step sequence control method, which comprises the following steps: a main control unit sends a washing instruction to a primary reverse osmosis unit after receiving a start instruction, and the primary reverse osmosis unit starts a washing process; the main control unit sends a fine sand conventional washing instruction to the fine sand filter unit after receiving a washing process completion signal, and the fine sand filter unit starts a fine sand conventional washing process; the main control unit sends an activated carbon conventional washing instruction to the activated carbon filter unit after receiving a fine sand conventional washing process completion signal, and an activated carbon filter starts an activated carbon conventional washing process; after receiving an activated carbon forward washing process completion signal, the main control unit sends a main pipe pollution discharge instruction to the primary reverse osmosis unit, and the primary reverse osmosis unit starts a main pipe pollution discharge process; and after the blowdown process of the main pipe is completed, the first-stage reverse osmosis unit begins to operate. According to the invention, the main pipe is added to discharge sewage, the devices are connected in series and are controlled by the main control unit through one-key start, wherein the operation amount is reduced and no buffer water tank is arranged in the middle, so that water resources are saved.

Description

technical field [0001] The invention belongs to the technical field of chemical water treatment, and in particular relates to a reverse osmosis step control method. Background technique [0002] At present, the desalinated water production system of the high temperature gas-cooled reactor mainly includes fine sand filter, activated carbon filter, primary reverse osmosis, secondary reverse osmosis, EDI main equipment and related supporting valves, water pumps and control systems. Among them, the pretreatment process (fine sand filter, activated carbon filter, etc.) and the first-stage reverse osmosis device need to be started manually, the automation level is low, and the site needs the cooperation of multiple people, and the operation of the equipment one by one leads to long start-up time and waste of water resources serious. In particular, the sewage discharge process of the main pipe cannot be cascaded in the reverse osmosis process, and requires the cooperation of three...

AI Technical Summary

Problems solved by technology

Among them, the pretreatment process (fine sand filter, activated carbon filter, etc.) and the first-stage reverse osmosis device need to be started manually, the automation level is low, and the site needs the cooperation of multiple people, and the operation of the equipment one by one leads to long start-up time and waste of water resources serious

In particular, the sewage discharge process of the main pipe cannot be cascaded in the reverse osmosis sequence, and three or more people are required to cooperate on site

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