A: The energy saving of the steam system is reflected in the whole process of steam consumption, starting from the planning and design of the steam system to the maintenance, management and improvement of the steam system. However, energy savings in steam boilers or steam generators often have a significant impact on steam systems.
In the process of generating steam, the first thing to do is to choose a well-designed steam boiler. The design efficiency of the boiler should preferably reach more than 95%. You must know that there is often a large gap between design efficiency and actual work efficiency. In actual working conditions, the parameters and design conditions of the boiler system are often difficult to meet.
There are two main ways to waste boiler energy. Use the boiler flue gas waste heat recovery device to effectively recover waste heat (flue gas heat), and use other low-grade waste heat to increase the feed water temperature and air preheating temperature.
Reduce and control the amount of boiler sewage and salt discharge, use a small amount of multiple salt discharge instead of regular salt discharge, boiler blowdown heat recovery system, reduce and eliminate boiler and deaerator heat storage waste During the shutdown period, the boiler body is kept warm.
Steam carrying water is an energy-saving part of steam that is often overlooked by customers, and it is also the most energy-saving link in the steam system. A 5% steam carry over (common) means a 1% reduction in boiler efficiency.
Moreover, steam with water will increase the maintenance of the entire steam system and reduce the output of heat exchange equipment. In order to eliminate and control the influence of wet steam (steam with water), the dryness of steam is specially used for evaluation and detection.
Some steam generators have dryness as low as 75-80%, which means that the actual thermal efficiency of the steam generator may be reduced by 5%.
Load mismatch is an important cause of waste of steam energy. Large or small horse-drawn carts can lead to inefficiencies in the steam system. Watt’s energy-saving experience is aimed at applications with frequent peak and valley loads, using steam heat storage balancers, modular boilers, etc.
The use of the deaerator not only increases the temperature of the steam boiler feed water, but also removes the oxygen in the boiler feed water, thereby protecting the steam system and avoiding the decline in the efficiency of the steam heat exchanger.
Post time: Jun-08-2023
