BOILERS, CONDENSERS AND CHIMNEYS
The hot water boilers used in the Keyway projects are perfectly suitable for greenhouses using CO2 as well as for normal greenhouses, thanks to the special system inside.
Keyway has gained international experience in greenhouse heating systems with more than 250 boilers that the company has put into operation so far.
As a result of R&D studies carried out with manufacturers, the company has developed and commissioned systems that produce very low levels of NOx, especially in boiler plants where CO2 is extracted from the flue gas.
With a much lower flue gas temperature than normal boilers, these boilers offer investors significant fuel savings.
Thanks to the 50 + 50 mm rock wool insulation surrounding the outer wall of the boiler, it is ensured that the hot water in the boiler can be kept for a very long time without cooling. Keyway uses high-quality and very compact hot water boilers thanks to the cooperation with international boiler brands. Thanks to the unique designs for the 2nd and 3rd flame pass in the boiler, the internal temperature of the boiler is maintained at an optimum level. Thanks to their compact structure, these boilers have advanced features that can be used for any greenhouse.
Flue gas economizers/condensers are used to cool flue gasses from natural gas-fired plants. In most installations, economizers are located at the back or top of the boiler. The energy in these installations is used to heat the water. The maximum temperature of the exhaust gasses in the economizer is 210°C.
The water circulating in the installation is heated to a maximum temperature of 95 ° C by using the additional efficiency of the flue gas economizer. The economizer is part of a closed system with a maximum permissible pressure of 3 bar.
Flue gas economizers are usually installed behind gas-fired boilers. All flue gases from the boiler are passed through the economizer, where they are cooled, and the heat from this process heats the water in the closed system. The remaining highly cooled flue gasses are either discharged to the open air or used for CO2 metering or other applications.