In recent years, the situation of water pollution prevention and control across the country has faced new changes, and water pollution prevention and control has become a major problem. With the continuous development of industrial modernization, the types and quantities of industrial wastewater produced have increased rapidly, resulting in different degrees of water pollution in various places. In order to reduce water pollution, industrial wastewater monitoring is planned as one of the key monitoring parts of water environment pollution.
In industrial wastewater monitoring, pH value is an important indicator for monitoring industrial wastewater. Because the level and size of PH value in industrial sewage, industrial wastewater and chemical wastewater will have a certain impact on the pipes, pumps, gate valves and water treatment structures of water treatment equipment. In industrial wastewater, most microorganisms can adapt to pH in the range of 4.5-9, and the most suitable pH is in the range of 6.5-7.5.
When the pH is lower than 6.5, the fungi begin to compete with the bacteria. When the pH reaches 4.5, the fungi will have a complete advantage in the biochemical tank, which will seriously affect the sedimentation results of the sludge; when the pH exceeds 9, the metabolic rate of the microorganisms will be reduced. hindered.
In order to monitor the pH value of industrial wastewater, we generally use industrial pH sensors. Industrial pH sensor is a sensor used to monitor the hydrogen ion concentration in the detected solution and convert it into a corresponding usable output signal.
industrial pH sensor overview
SenTec industrial PH sensor WQ series is a sensor independently developed by our company to monitor the pH value (hydrogen ion concentration index, pH) of the solution. With automatic temperature compensation function, automatic temperature compensation and manual temperature compensation can be switched at will. This product is suitable for industrial sewage, domestic sewage, agriculture, aquaculture and other scenarios in a non-corrosive weak acid and weak alkali environment.
The sensor adopts a high-precision sensor, and the measurement is accurate. Its pH measurement range is between 0 and 14 pH, and the resolution is 0.01 pH. It can work within 0-60°C and relative humidity of 0-85%, the electrode adaptable temperature is 0-80°C, the cable length is 5m, 10m, 15m, 20m, and the product shell is IP65. The protection grade can be used for Outdoor rain and snow environment.
The output signal types of industrial PH sensor are divided into two types: RS485 and analog. Among them, the RS485 industrial PH sensor can communicate up to 2000 meters away. The standard modbus protocol, the communication address can be set, and the baud rate can be modified. The data collected by the RS485 industrial PH sensor can be connected to the environmental monitoring host through the RS485 wiring method, and then uploaded to the environmental monitoring cloud platform through the GPRS/4G signal output method. Real-time monitoring is achieved through the environmental monitoring cloud platform to ensure the safe discharge of industrial wastewater.
When it is detected that the pH concentration exceeds the preset alarm value, it can provide alarm methods such as interface alarm, sound and light alarm, SMS alarm, telephone alarm, email alarm, etc., to remind the management personnel to investigate the cause of the pH value exceeding the standard in time, and record the event for Call and analyze.
industrial pH sensor installation method
1. Submerged installation: The lead wire of the pH electrode is passed through the stainless steel tube, and the 3/4 thread on the top of the pH electrode is connected with the stainless steel 3/4 thread with a raw material tape. Make sure that the top of the electrode and the electrode wire are free of water.
2. Side wall installation: The manufacturer provides a 316L full stainless steel sheath with a bevel, and the pH electrode can be screwed into the sheath.
3. Pipeline installation: Connect to the pipe through the 3/4 thread of the pH electrode.
industrial pH sensor installation
industrial PH sensor precautions and maintenance
Industrial PH sensor precautions and maintenance:
1. The equipment itself generally does not need routine maintenance. When there is an obvious failure, please do not open it to repair it yourself, and contact us as soon as possible!
2. In principle, the electrode should be calibrated before each measurement, and the electrode should be calibrated regularly for long-term use.
4. Before the measurement, the bubbles in the electrode glass bulb should be shaken off, otherwise it will affect the measurement. During the measurement, the electrode should be left statically after stirring in the measured solution to speed up the response.
5. Deionized water should be used to clean the electrode before and after measurement to ensure accuracy.
6. During the period of non-use, the electrode should be stored in 3mol/L potassium chloride solution (3M KCl). If the pH electrode is left dry or soaked in distilled water for a long time, the service life of the electrode will be shortened.
7. The electrode life cycle is about one year, and the new electrode should be replaced in time after aging.
