Application Case--A company's heating equipment renovation project

The project has a construction area of 1.56 million square meters, and four 29 MW gas-fired hot water boilers are installed. The heat network return water temperature is 45~50℃ and the water supply temperature is 75~100℃.

A high-efficiency flue gas Air Heat Exchanger is added to the exhaust of the four gas boilers and a BDZ600-R1 direct-fired heat pump is added to recover flue gas heat. After the completion of the renovation, the total energy saving of the heat pump unit is 18,000 GJ in 97 days of operation, accounting for about 6.9% of the total heat supply. Based on one full heating season, the heat recovery will reach 23,000 GJ, which is equivalent to saving 785 tons of standard coal/year and reducing 2176.4 tons of CO2/year.

The applied equipment - Flue gas heat exchanger

Flue gas heat exchanger, Twisted Tube Heat Exchanger, is a kind of waste heat recovery equipment, which is simply a heat exchanger for our flue gas to achieve the heat change of two media. The flue gas will generally transfer heat with water, air, heat transfer oil or its substances that can absorb heat from hot flue gas because of the presence of temperature difference.

Technology principle and process

The absorption lithium bromide heat pump is driven by thermal energy (gas, steam or hot water, etc.) to generate low temperature water and send it to the flue gas heat exchanger. The low temperature water passes through the flue gas heat exchanger to recover waste heat from the exhaust of large boilers, and the recovered heat is sent to the heat network, which can effectively recover low-grade waste heat from the exhaust of boilers.

Product Categories : Air Heat Exchanger > Twisted Tube Heat Exchanger