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Automatic control system for wastewater treatment in steel plants
Automatic control system for wastewater treatment in steel plants
Product details
For the current production process analysis of China's steel industry, the selection of steel materials includes production processes such as sintering, ironmaking, steelmaking, and rolling steel. The steel wastewater that comes with it comes from production process water and some equipment water, cooling water, washing water, etc. Indirect cooling water is only contaminated by heat during use and can be reused after cooling; Direct cooling water contains pollutants due to direct contact with product materials, and can only be reused or cascaded after treatment.
Automatic control system for wastewater treatment in steel plants
The automatic control system for steel wastewater treatment can achieve the desired effect
1. Unified command, coordinated management, high work efficiency
2. Automatic storage and traceability of data reports
3. Timely push of alarm information for site hazards and malfunctions
4. Facial and license plate structuring, intelligent analysis and retrieval of files
The design of the self-control system for the wastewater treatment project in the steel plant requires the use of a distributed control system, which adopts the principle of "centralized monitoring and decentralized control". The industrial control network of the entire plant is composed of a plant level central monitoring workstation and on-site decentralized control stations. The communication between the on-site control level and the two central dispatch computers adopts a high-speed industrial Ethernet network with communication fiber as the medium.
Steel plant wastewater is generally produced during the high-temperature dry distillation, purification, and by-product recovery processes of coking and coal gas, which contains volatile phenols, polycyclic aromatic hydrocarbons, and heterocyclic compounds such as oxygen, sulfur, and nitrogen. It is an industrial organic wastewater that is prone to heavy metal exceedance and difficult to treat.
The wastewater from steel plants mainly includes sintering, ironmaking, steelmaking, steel rolling wastewater, and domestic sewage, as well as the running, emitting, dripping, leaking, and ground flushing water during the water use process in various production workshops. The main pollutants include COD, BOD5, SS, oil, dissolved salts, and waste acid.
Solution for wastewater treatment in steel plants
1: Add heating rods to the biochemical pool to regulate the water temperature and create a suitable temperature state for microorganisms;
2: Add reaction equipment in the middle of the process;
3: Add heavy metal capture agents at the end of the process to rapidly combine and precipitate heavy metals.
There are three common wastewater treatment solutions for steel enterprises
physicochemical method
The physical chemical method is the main way for steel enterprises to treat wastewater, particularly in the treatment of oily wastewater. In operation, the main application is flocculation method, which applies coagulants to wastewater to achieve the goal of metal ion removal and achieve effective treatment of wastewater.
Biological treatment of wastewater from steel enterprises
By utilizing biological methods, the accumulation of metal ions in living organisms can be achieved, achieving the goal of wastewater treatment. Based on the characteristics and advantages of biological methods, efficient composite microorganisms are added to the activated sludge system to analyze their reaction effect on cold rolling wastewater, especially to determine the optimal parameter settings. By using this method, effective removal of ammonia nitrogen can be achieved with high removal efficiency on a continuous basis.
Physical method for treating steel wastewater
The physical method mainly utilizes physical operations to achieve the separation and recovery of pollutants in wastewater, commonly using precipitation and adsorption methods. In addition, the method based on heat exchange is also considered a physical treatment method. By leveraging the advantages of microwave radiation technology and conducting regeneration experiments on activated carbon, a high regeneration efficiency can be achieved. The regenerated activated carbon can be effectively applied in the treatment of coking wastewater, with significant results. The COD removal rate is extremely high, even reaching 80%. By utilizing high gradient magnetic field technology, effective treatment of wastewater from hot rolling plants can be achieved, reducing iron ion content and promoting water quality to meet the standards and requirements of recycled water.
Industrial wastewater pollution monitoring system
Functions of the electrical control system for industrial wastewater treatment in steel plants
1. Alarm control function of water treatment automatic control system
In industrial settings, temperature is one of the most frequently involved parameters. The seemingly simple temperature control mainly relies on the control function of the automatic control system for water treatment. At the same time, the alarm function of the water treatment automatic control system can be applied to temperature control to achieve temperature alarm control.
Set temperature upper and lower limit parameters in the system, and raise or warm the temperature by monitoring changes in water temperature. At the same time, if the water temperature is lower or higher than the set parameters, the system will issue an alarm, prompting the user to check and repair the relevant equipment or system, and adjust the controlled equipment in a timely manner. In addition to temperature alarm control, it is also applied in the system to set water quality alarm control and liquid level alarm control functions.
2. Record analysis function of automatic control system for water treatment
The recording and analysis function of the water treatment automatic control system is to collect, organize, calculate, and store various data information collected by the system. In industrial production, real-time monitoring of operating equipment is required, and changes in various data during the operation of controlled equipment should be recorded. If it is manually recorded, it is not only time-consuming and laborious, but also prone to errors. Therefore, by using the recording and analysis function of the water treatment automatic control system to automatically collect changes in various parameters, not only is it accurate and fast, but the system also automatically analyzes and stores data information through data modules.
The application of recording and analysis function in water treatment automatic control system can record all parameters and data information in industrial production. Improve the automation level of equipment operation and save manual management. Especially used in water treatment systems to record changes in parameters such as water temperature, water quality, liquid level, and flow rate, and to draw corresponding change curve tables, in conjunction with computers for on-site monitoring of water temperature, water quality, and other parameters. The effects and roles that should be used in water treatment work are very obvious and important.
3. Quantitative control function of water treatment automatic control system
For manufacturing enterprises, during the production process, water is usually added at once, and there are certain requirements for the amount of water added, which requires the use of quantitative control functions. The quantitative control function can accurately control the amount of water that needs to be invested. Input water demand in one go or in batches to improve production efficiency and quality. Quantitative control can be used in water treatment automatic control systems to quantitatively control various types of liquids. Such as adding water, acid and alkali, etc.
4. Start stop control function of water treatment automatic control system
The start stop control function of the water treatment automatic control system is the most fundamental operation in the automation control of controlled equipment, which involves starting, stopping, opening, or closing the controlled equipment. For example, when controlling the pressurization equipment, when the pressure of the pressurization equipment reaches a certain value, it is necessary to stop the pressurization equipment to ensure that the required pressure value of the equipment is within the set range. In the water supply system, by adjusting the frequency and speed of the water pump, when the water supply or pressure reaches the required value, the system will control the water pump to stop working.
5. Online monitoring function of water treatment automatic control system
The application of online monitoring function can be manifested in liquid level monitoring, flow monitoring, pressure monitoring, water quality monitoring, etc. Monitor each point in the water treatment system through the sensing device of the system. Good control over the overall operation of the equipment. For example, in many cases, specialized experimental instruments are needed to monitor liquids to obtain detection values. However, if it is a mixed liquid, the liquid contains many components, impurities, and other elements, and manual detection is labor-intensive and prone to errors.
By connecting the sensing device with the control system, changes in various data items in the water system can be well detected, such as monitoring the pH value, heavy metal content, mineral elements, etc. contained in the water. At the same time, accurately detect changes in liquid level, pressure, etc. during the operation of the equipment. Assist users in conducting better analysis of numerical tasks.
Ordering service and ordering of water treatment automatic control system in steel plant
Yidong Electric Steel Plant's wastewater self-control system provides comprehensive technical support services during use. Yidong Electric has established a professional customer service for marketing services, providing free pre-sales, in sales, and after-sales technical consultation and maintenance guidance to solve problems raised by users.
24-hour service hotline:
Ordering Notice: Due to different product usage scenarios and user requirements, please contact the electrical engineer of Yidong Electric to customize according to the requirements.
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