Prediction system for residual water production amount in cleaning period of reverse osmosis device

Abstract

The invention discloses a system for predicting residual water production in a cleaning period of a reverse osmosis device. Comprising a reverse osmosis device historical average water yield constant block, a switching value constant block, a reverse osmosis device real-time water production flow analog input block, a reverse osmosis device high-pressure water feed pump operation state switching value input block, a reverse osmosis device chemical cleaning completion switching value input block, a first either-or switching block, an accumulation block, a first pulse block and a first delay block. The device comprises a first one-out-of-two switching block, a second one-out-of-two switching block, a first subtraction block, an absolute value block, a first division block, a comparison equal block, a second subtraction block, a third one-out-of-two switching block, a fourth one-out-of-two switching block, an addition block, a first comparison greater block, a fifth one-out-of-two switching block and a second division block, the system can predict the residual water production quantity of the reverse osmosis device before the next restorative cleaning by using a residual water production quantity analog quantity output block in the cleaning period of the reverse osmosis device and a new historical average water production quantity analog quantity output block of the reverse osmosis device.

Description

technical field [0001] The invention belongs to the technical field of thermal control of a water treatment system, and relates to a system for predicting the remaining water production in a cleaning cycle of a reverse osmosis device. Background technique [0002] At present, in the water treatment system of various industries, the reverse osmosis device is widely used as a desalination treatment process. Although the pretreatment process of reverse osmosis influent has been very mature, the occurrence of reverse osmosis membrane fouling is inevitable, so the timing of recovery cleaning of reverse osmosis membrane is particularly important. In the actual production process, operators can only comprehensively judge whether the reverse osmosis membrane needs recovery cleaning by comprehensively evaluating the operating parameters such as the reverse osmosis membrane inlet pressure, inter-stage pressure difference, and permeate flow rate, and cannot directly predict the reverse...

AI Technical Summary

Problems solved by technology

In the actual production process, the operator can only comprehensively judge whether the reverse osmosis membrane needs restorative cleaning by comprehensively judging the operating parameters such as the inlet pressure of the reverse osmosis membrane, the pressure difference between the stages, and the flow rate of the produced water, and cannot directly predict the reverse osmosis membrane. The specific time point of restorative cleaning cannot accurately control the restorative cleaning cycle of the reverse osmosis device, which makes the restorative cleaning lack of planning and timeliness

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