We usually pay attention to the whole sewage treatment industry, and the sewage treatment detection instrument that plays a great role in sewage treatment, I believe that there must be little attention, today Xiaobian sorted out several commonly used sewage treatment detection instruments, I hope it will be helpful to you.
1. Ultrasonic level gauge
One ultrasonic level gauge is installed in each of the sewage lifting well and the anaerobic feed well, which reflects the degree of gas water sealing from other sections and the sewage from the anaerobic pool through the liquid level difference between the front and rear in the well tank, and transmits it to the PLC controller for analysis and calculation. When the liquid level exceeds the set value, the operating column switch of the on-site pump can be activated in the automatic position, and the pump of the automatic control well can be automatically started and stopped. In this way, the pump operation status can be adjusted accurately and timely according to the amount of external water, and the fatigue of the equipment can be reduced; At the same time, it can eliminate the human resource consumption of three shifts in the traditional pumping station.
2. Flowmeter and transmitter
Real-time monitoring of flow and throughput. Water volume is an important control parameter for the management of the operation of the wastewater treatment section. Accurate and timely grasp of the inflow water plays an important role in process control and improving the ability of sewage section to resist hydraulic load impact. The traditional water quantity measurement uses weir plates or venturi flow troughs, etc., which have the disadvantages of not being able to monitor and display in real time. Jiangsu Shagang Group Hongfa Coking Plant Chemical Production Workshop Sewage Treatment In the reflux sludge pipeline and the remaining sludge pipeline and anaerobic tank, 5 imported electromagnetic flowmeters with a measurement range of 0-1200m3/h are installed to measure the flow rate of reflux sludge and residual sludge. The electromagnetic flowmeter can not only display the flow rate of water on the spot, but also display the flow rate and cumulative treatment capacity in real time on the host computer through the transmission of PLC, so as to achieve the purpose of accurately measuring the treated water volume and providing real-time flow for operation management. After installing the electromagnetic flowmeter, the personnel on duty can judge whether the return sludge pump and the remaining sludge pump are working normally according to whether the displayed flow rate is correct, which solves the problem that the submersible pump can not simply judge whether the work is normal, and the electromagnetic flowmeter also has the characteristics of easy installation and simple maintenance. When the sewage phenol cyanide blower blows air to the aerobic tank, we directly install four gas flow meters with a measurement range of 0-4000m3/h (standard condition) on the air pipeline between the two, and then obtain the air volume in the pipeline through the EJA transmitter 4-20mA signal conversion, and display and monitor it in the host computer in real time through the PLC system.
3. Dissolved oxygen meter and pH detector
The workshop treatment section adopts the process of traditional activated sludge method. The biological treatment of the aerobic pond is undoubtedly the most important part of sewage treatment, and various organic pollutants in the sewage can be effectively removed through the biological treatment in the aerobic pond. The sewage phenol cyanide blower used for oxygenating the aerobic pond is the main equipment for the electric energy consumption of the sewage treatment section, and the electric energy consumption accounts for about the general consumption of the entire section, in order to reduce the waste of electric energy caused by excessive unnecessary oxygenation. Dissolved oxygen meters with a measurement range of 0.05-10mg/L are installed in the biochemical treatment area of the sewage treatment section, which detects the dissolved oxygen concentration online in real time, converts the detected concentration into a standard current signal and transmits it to the PLC and the host computer in time. When the detection concentration is less than or greater than the specified range, the PLC immediately issues a control command to adjust the outlet valve of the sewage phenol cyanide blower, so as to ensure the good biochemical ability of the bacteria in the aerobic pond, enhance the decomposition ability of aerobic bacteria, and also reduce the power consumption of the sewage treatment section. In order to have a better effect on sewage treatment, we must effectively control the acid-base concentration of the influent water of the biochemical tank. In order to reduce the labor intensity of the operator, a pH meter online detection device is installed in the biochemical treatment area to detect the acid-base concentration of the inlet water of the biochemical tank in real time. And through the organic combination with the PLC control system, the data detected on the spot is transmitted to the PLC and the host computer, and the acid and alkali concentration of the inlet water and the water in the biochemical pool can be observed at any time directly on the computer screen, so as to facilitate timely adjustment.
4. Sludge concentration meter
Sludge concentration control in sludge thickening tanks. The sludge concentration in the sludge thickening tank is an important process parameter in the wastewater treatment process. In traditional sewage treatment plants, sludge concentration relies on laboratory monitoring using old test methods, which has great shortcomings in the timeliness and accuracy of data provision, and it is difficult to adjust the process of reflux sludge and residual sludge in time, resulting in time and accuracy errors. The sewage treatment section of the chemical production workshop of Jiangsu Shagang Group Hongfa Coking Plant has installed an online sludge concentration measuring meter with a measurement range of 0.5-10g/L on each sludge thickening tank, which converts the detected concentration signal into a standard electrical signal of 4-20mA and transmits it to the PLC and the host computer in time to compare with the parameters set by the system, and makes corresponding control according to the comparison results, which solves this problem well. The installation of a sludge concentration meter can adjust the process of the sludge thickening tank in a timely manner according to the accurately measured sludge concentration at any time, and at the same time reduce the labor intensity of laboratory staff.
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