Oxidation-reduction potential precise control method and system for reverse osmosis device

A reverse osmosis device and precise control technology, applied in chemical instruments and methods, permeation/dialysis water/sewage treatment, water/sewage treatment, etc., can solve problems such as change and ORP control, and achieve increased stability and excellent working conditions , the effect of preventing oxidation

Inactive Publication Date: 2019-07-30
ZHEJIANG ZHENENG ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, due to changes in raw water quality and temperature, it is actually impossible to ensure that the ORP at the inlet of the reverse osmosis device is controlled within an appropriate range through simple debugging. At present, there is still a lack of a reverse osmosis device with high control accuracy and high efficiency. Method and system (device) for precise control of redox potential

Method used

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  • Oxidation-reduction potential precise control method and system for reverse osmosis device
  • Oxidation-reduction potential precise control method and system for reverse osmosis device

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Embodiment 1

[0050] A method for precisely controlling the oxidation-reduction potential of a reverse osmosis device, comprising the steps of:

[0051] S1. Set the first online oxidation-reduction potential measuring instrument at the inlet of the multimedia filter of the reverse osmosis system, and set the sodium hypochlorite metering pump at the outlet of the booster pump. By controlling the frequency or opening of the sodium hypochlorite metering pump, the multimedia filter The ORP at the inlet is controlled at 500-600mV;

[0052] S2. Install a second online redox potential measuring instrument at the inlet of the reverse osmosis device of the reverse osmosis system, and use the values ​​measured by the second online redox potential measuring instrument as the first reducing agent metering pump and the second reducing agent metering pump The control parameters of the frequency or opening degree are as follows:

[0053] S21. When the ORP at the inlet of the reverse osmosis device is les...

Embodiment 2

[0059] A method for precisely controlling the oxidation-reduction potential of a reverse osmosis device, comprising the steps of:

[0060] S1. Set the first online oxidation-reduction potential measuring instrument at the inlet of the multimedia filter of the reverse osmosis system, and set the sodium hypochlorite metering pump at the outlet of the booster pump. By controlling the frequency or opening of the sodium hypochlorite metering pump, the multimedia filter The ORP at the inlet is controlled at 500-600mV;

[0061] Control the ORP at the inlet of the multi-media filter at 500-600mV, which can not only avoid the growth of organic matter and microorganisms at the inlet and inside of the multi-media filter, but also prevent the oxidation damage of the multi-media filter and ensure a good pre-treatment desalination effect.

[0062] . Install a second online redox potential detector at the inlet of the reverse osmosis device of the reverse osmosis system, and use the values ...

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Abstract

The invention discloses an oxidation-reduction potential precise control method for a reverse osmosis device. The method comprises the following steps that S1, the ORP of an inlet of a multi-media filter is controlled to be 500-600 mV by controlling the frequency or opening degree of a sodium hypochlorite metering pump; S2, a second on-line oxidation-reduction potential detector is arranged at aninlet of the reverse osmosis device of a reverse osmosis system, and a value detected by the second on-line oxidation-reduction potential detector serves as a control parameter for the frequency or opening degree of a first reducing agent metering pump and a second reducing agent metering pump. By means of the oxidation-reduction potential precise control method for the reverse osmosis device, theORP of the inlet of the reverse osmosis device can be accurately controlled to be within a suitable range of 250-300 mV, breeding of organic matter and microorganisms at the inlet of the reverse osmosis device can be avoided, the oxidation of a reverse osmosis membrane can also be prevented, and it is ensured that the running condition of the reverse osmosis system is excellent.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a precise control method and control system for an oxidation-reduction potential of a reverse osmosis device. Background technique [0002] The reverse osmosis device (RO) passes the raw water through a fine filter, a granular activated carbon filter, a compressed activated carbon filter, etc., and then pressurizes it through a pump. 1 / 300 of the virus) reverse osmosis membrane (RO membrane), so that the higher concentration of water into low-concentration water, and at the same time isolate industrial pollutants, heavy metals, bacteria, viruses and other impurities mixed into the water, so as to meet drinking regulations physical and chemical indicators and health standards. The reverse osmosis device applies membrane separation technology, which can effectively remove charged ions, inorganic substances, colloidal particles, bacteria and organic substances in water...

Claims

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Application Information

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IPC IPC(8): C02F1/44
CPCC02F1/441
Inventor 诸剑锋徐伟孙伟钢
Owner ZHEJIANG ZHENENG ELECTRIC POWER
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