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Device and method for disinfecting RO (reverse osmosis) membrane by hot water

A disinfection method, hot water technology, applied in the direction of chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of RO membrane damage, RO membrane peeling, RO membrane filtration performance reduction, etc., to achieve the purpose of prolonging the service life Effect

Active Publication Date: 2014-05-07
GUANGZHOU TECH LONG PACKAGING MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the water temperature change rate exceeds 5°C / min, the polymer material of the RO membrane is prone to excessive shrinkage and peeling off of the RO membrane, the RO membrane may be seriously damaged by the influence of the water temperature, the filtration performance of the RO membrane is greatly reduced, and the disinfection performance of the membrane shell equipment is greatly improved. reduce

Method used

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  • Device and method for disinfecting RO (reverse osmosis) membrane by hot water
  • Device and method for disinfecting RO (reverse osmosis) membrane by hot water
  • Device and method for disinfecting RO (reverse osmosis) membrane by hot water

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Embodiment 1

[0042] figure 2 It is the realization flow chart of the hot water disinfection method of the embodiment of the present invention, and it comprises the following steps:

[0043] S201, raise the water temperature.

[0044] Raise the water temperature in the hot water tank and the water flow circuit, and pass the raised water temperature from the hot water tank into the membrane shell through the water flow circuit, clean the RO membrane with hot water, and kill the RO with hot water at the same time bacteria on the membrane.

[0045] S202, detecting the water temperature.

[0046] The first temperature sensor is used to detect the water temperature on the water inlet pipeline of the membrane case, so as to obtain the temperature of the hot water entering the membrane case.

[0047] S203, when the sterilization temperature is reached, stop heating up.

[0048] According to the known temperature of hot water entering the membrane shell, the action of the water temperature reg...

Embodiment 2

[0050] image 3 It is a flow chart of the specific implementation of the second hot water disinfection method in the embodiment of the present invention, which includes the following steps:

[0051] S301, add normal temperature water into the hot water tank, detect T 出 with T 进 .

[0052] Use the first temperature sensor and the second temperature sensor to measure the temperature T of the water entering the membrane shell 进 and the water temperature T from the membrane shell 出 to collect.

[0053] S302, if|T 进 -T 出 |出 Add 2.5 degrees Celsius as T.

[0054] Compare T 进 with T 出 temperature difference between. When the temperature difference is greater than 5 degrees Celsius, it is defined that the first temperature sensor and / or the second temperature sensor is faulty; when the temperature difference is less than 5 degrees Celsius, then T 出 Add 2.5 degrees Celsius to set the target temperature T and enter the next step.

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Abstract

The invention discloses a device for disinfecting an RO (reverse osmosis) membrane by hot water. The device comprises a hot water cylinder, a membrane shell provided with an RO membrane internally, and a PLC, wherein the hot water cylinder is provided with a hot water cylinder water inlet and a hot water cylinder water outlet, the membrane shell is provided with a membrane shell water inlet and a membrane shell water outlet, the hot water cylinder water inlet and the hot water cylinder water outlet are respectively correspondingly connected with the membrane shell water outlet and the membrane shell water inlet by a pipeline so as to form a water flow loop, the water flow loop is provided with a water pump and a water temperature regulating device as well as a first temperature sensor for detecting the water temperature, and the water temperature regulating device and the first temperature sensor are connected with the PLC. Water in the hot water cylinder is used for cleaning the RO membrane in the membrane shell, and the water temperature is continuously raised so as to enhance the effect of killing bacteria on the RO membrane. The PLC is used for controlling the water temperature regulating device to prevent the water temperature from exceeding the tolerant temperature of the RO membrane, the RO membrane is prevented from being damaged by high water temperature, and thus the filtering performance of the membrane shell cannot be alleviated. The service life of the membrane shell device can be greatly prolonged according to a method disclosed by the invention.

Description

technical field [0001] The invention relates to a disinfection device, in particular to a device and method for disinfecting RO membranes with hot water. Background technique [0002] Conventional normal temperature reverse osmosis membranes are used in the reverse osmosis system. Conventional normal temperature reverse osmosis membranes are prone to breed bacteria. When disinfecting hot water is used to disinfect the breeding bacteria, they cannot withstand the high temperature environment of disinfecting hot water. The chemical disinfection method adopted has the limitation of polluting the environment and few types of sterilization. [0003] At present, membrane shells are commonly used, but there are RO membranes in the membrane shells, and RO membranes are prone to breed bacteria. Therefore, membrane shells used in reverse osmosis systems need to be disinfected frequently. Since the RO membrane is made of polymer materials, it has strict requirements on the temperature...

Claims

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Application Information

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IPC IPC(8): B01D65/02
Inventor 祝中礼朱定洲
Owner GUANGZHOU TECH LONG PACKAGING MACHINERY CO LTD