As a key heat exchange equipment in power stations and industrial production, the working performance of steam turbine condenser directly affects the efficiency of the whole system. However, fouling is inevitable in long-term operation, and severe fouling not only affects the heat exchange effect, but also may cause equipment damage and safety accidents. Mastering the scientific cleaning method and correctly and effectively solving the scaling problem of the condenser has become the focus of attention in the industry.
1. The hazards of condenser fouling.
Condenser fouling is mainly formed by the deposition of minerals in the water at high temperatures, a process that affects the normal operation of the condenser. The low heat exchange efficiency of the condenser after fouling will lead to a decrease in the refrigerant flow rate and an increase in the temperature difference, which in turn will cause a series of problems such as equipment overheating, corrosion, increased energy consumption, and reduced production capacity. If not handled properly, it can even shorten the life of the equipment, increasing the maintenance cost and downtime loss of the enterprise.
2. Reasons for the formation of condenser fouling.
In order to effectively clean the fouling in the condenser, it is first necessary to understand the cause of the fouling formation. Common causes of fouling include:
1.Water quality problems: Cooling water containing more minerals and microorganisms is fouling"The culprit"。
2.Equipment material: The surface roughness of the material is different, and the sediment is easier to adhere.
3.Equipment design: The water flow rate in the condenser is too slow or unevenly distributed, resulting in the accumulation of minerals in some areas.
4.Improper operation: Unreasonable setting of operating parameters during equipment operation will also accelerate scaling.
3. The method of cleaning the condenser.
In the face of heavy fouling, cleaning is necessary to restore the normal operation of the equipment. Here are some effective ways to clean your condenser:
1.Mechanical cleaning method.
Mechanical cleaning method mainly refers to the use of physical means to remove the scale inside the condenser, generally a "physical" dredging method, Anhui Yuanqing Pipeline Technology Co., Ltd. specializes in the development and production of machines for dredging various heat exchange pipelinesyq-t-3000Industrial Pipe Cleaning Machine。We have 3kw, 55kw high power, can be single-axis, double-axis, and even four-axis work at the same time, improve dredging efficiency, save the engineering cycle, the front end of our equipment with cemented carbide steel cutter head, to dredge the dirt on the inner wall of the official road, the size of the cutter head and cleaning brush can be used according to the current working conditions, quickly open up the dirt inside the pipeline, the unique cutter head design, truly achieve 0 damage to the pipe wall, and solve a major problem that the customer's condenser pipeline is difficult to dredge. When using, it is necessary to choose the appropriate dredging machine according to different types of heat exchange equipment and blockages, and use it according to the operating instructions.
2.Chemical cleaning method.
Chemical cleaning is an effective method of dissolving or decomposing scale by adding chemical reagents. Choosing the right cleaning agent for different types of fouling components is key. Commonly used cleaning chemicals include acidic and alkaline cleaning agents, which are able to remove carbonate, sulfate and organic scales in a targeted manner. Chemical cleaning requires strict control of concentration and time to avoid corrosion of the condenser.
3.Electrochemical cleaning.
On the basis of chemical cleaning, the electrochemical cleaning method introduces electric current to improve the cleaning efficiency. Through anodizing and cathodic reduction, electrochemical cleaning can effectively decompose the scale layer. This method has strong applicability and fast cleaning speed, but it has high requirements for equipment and operators.
4.Temperature cycle method.
The periodic change of temperature is used to make the scale layer produce the physical process of thermal expansion and cold contraction, so as to achieve the purpose of loosening and shedding the scale. This method is often used in combination with other cleaning methods to improve the cleaning effect.
4. Precautions in the cleaning process.
Regardless of the cleaning method, there are a few things to keep in mind:
Strictly follow the operating procedures to ensure the safety of personnel and equipment.
Have a detailed understanding of the structure and material of the condenser before cleaning, and avoid using improper cleaning methods.
After cleaning, discharge and neutralization treatment should be carried out in time to ensure that no secondary pollution is caused to the environment.
The cleaning effect should be evaluated clearly to ensure that the equipment is restored to the best working condition.
5. Preventive measures against scaling.
Prevention is more important than cleaning to solve the problem of fouling. Here are some suggestions to prevent scaling:
Optimize water treatment facilities to reduce the mineral content of cooling water and reduce the potential for fouling.
Improve the design and manufacturing of condensers, use anti-fouling materials, improve flow rates and heat transfer efficiency.
Reasonable control of operating parameters to avoid local overheating and water siltation.
Regularly inspect and maintain the condenser, and deal with early fouling in time.
The ultimate purpose of this article is to provide readers with professional guidance and methods to solve the problem of fouling of steam turbine condensers. Proper response to condenser fouling not only protects equipment and increases efficiency, but also saves costs and ensures production safety. In the future, only by continuously optimizing the equipment design and maintenance system can we fundamentally reduce the problem of fouling and achieve efficient and clean energy production and use.