Energy-saving “tips” for small assembled boilers”
Thread Content
Previously, I noticed that many companies, when using small assembly boilers, did not provide thermal insulation for the boiler’s flue gas outlet leading to the economizer, nor for the economizer itself; however, I didn’t pay too much attention to this issue. Later, as the company sought to improve energy efficiency and reduce consumption while increasing productivity and cutting emissions, I tried to address this issue by insulating those areas of the company. To my surprise, the results were good – the temperature of the incoming water increased by more than 20 degrees Celsius. Based on the most conservative theoretical calculations, this alone can help the company save over 200 tons of coal (the company’s boilers are relatively small, so the total coal consumption is not high – around a few hundred tons per month). The investment required is minimal; the cost can be recouped within the same month, with a surplus remaining. I wonder if this is a problem in other companies as well: on small assembly boilers, should the flue gas outlet and the economizer be insulated?
The small assembly boilers used in my former workplace also had insulation structures for the cast-iron economizers; the approach taken was to fix the economizer separately within a frame, with an insulation layer surrounding it, approximately 100 mm thick.
These days, the boiler flue ducts and economizers are all insulated. . There are few that aren’t insulated; I’ve never seen one that isn’t. All of our company’s products require customers to maintain insulation
Some small boilers are equipped with economizers, while others do not. Insulating the economizer increases the feedwater temperature and improves the boiler’s thermal efficiency; however, it is even more important to strengthen management in such cases.
In addition to the aforementioned measures, there are many others, such as: 1. The coal feeding structure of the boiler’s coal hopper uses a layered, branched coal feeding and combustion system； 2. The air induction fan and blower use variable frequency speed control to regulate air volume ； 3. Modify the furnace arch based on the coal type (mainly the volatiles content of the coal) ； 4. Regularly clean the ash buildup on the tubes of the heating surfaces inside the boiler ； 5. Strictly control the water quality of water entering the boiler to prevent damage to the structure inside the boiler drum and pipes ； 6. The joints of all smoke and air ducts must be tight to minimize air leakage. Wait······