The reporter recently learned from Langfang Jinsheng Energy Saving Technology Service Co., Ltd. that a new type of economizer developed and produced by the company in cooperation with other units has more than double the heat absorption rate of traditional cast iron economizer and improved the boiler thermal efficiency by 5%. ~8%. At present, the product is being promoted and applied in the petrochemical industry.
According to reports, the exhaust heat loss is the largest one of the boiler heat losses, generally about 5% to 12%, accounting for 60% to 70% of the boiler heat loss. The main factor affecting the heat loss of exhaust gas is the exhaust gas temperature. Under normal circumstances, the exhaust gas temperature increases by 10°C, and the exhaust heat loss increases by 0.6% to 1%, corresponding to more coal consumption of 1.2% to 2.4%.
The new economizer adopts H-shaped finned tube as the heating main body. Its side length is approximately twice as long as the light tube, thus expanding the heating surface. At the same time, the finned tube adopts the flash resistance welding process and has good heat conduction performance. Conventional economizers generally only ensure that the smoke temperature decreases by 30-35°C. The new economizer exhaust gas temperature can be as low as 120°C and the temperature drop can be as high as 100°C or more. Taking a 10-ton boiler as an example, after installing the ribbed-tube economizer, the temperature of the flue gas is reduced from 210° C. to below 150° C., the boiler efficiency is increased by 5%, the daily coal saving is 1.44 tons, and the annual cost savings are nearly 300,000 yuan. .
It is reported that there are 500,000 industrial boilers in China with a total capacity of 1.8 million tons of steam per hour. When the boiler thermal efficiency increases by 1%, it will save 11 million tons of standard coal, reduce carbon dioxide emissions by more than 40 million tons, and promote the use of the new type of coal The economic benefits and environmental benefits of the device are very significant.
According to reports, the exhaust heat loss is the largest one of the boiler heat losses, generally about 5% to 12%, accounting for 60% to 70% of the boiler heat loss. The main factor affecting the heat loss of exhaust gas is the exhaust gas temperature. Under normal circumstances, the exhaust gas temperature increases by 10°C, and the exhaust heat loss increases by 0.6% to 1%, corresponding to more coal consumption of 1.2% to 2.4%.
The new economizer adopts H-shaped finned tube as the heating main body. Its side length is approximately twice as long as the light tube, thus expanding the heating surface. At the same time, the finned tube adopts the flash resistance welding process and has good heat conduction performance. Conventional economizers generally only ensure that the smoke temperature decreases by 30-35°C. The new economizer exhaust gas temperature can be as low as 120°C and the temperature drop can be as high as 100°C or more. Taking a 10-ton boiler as an example, after installing the ribbed-tube economizer, the temperature of the flue gas is reduced from 210° C. to below 150° C., the boiler efficiency is increased by 5%, the daily coal saving is 1.44 tons, and the annual cost savings are nearly 300,000 yuan. .
It is reported that there are 500,000 industrial boilers in China with a total capacity of 1.8 million tons of steam per hour. When the boiler thermal efficiency increases by 1%, it will save 11 million tons of standard coal, reduce carbon dioxide emissions by more than 40 million tons, and promote the use of the new type of coal The economic benefits and environmental benefits of the device are very significant.