1. Suitable for the waste heat gas with larger dust content 2. Double shell style with each one upper and lower drum is applicable to the small gas volume. Triple shell style with one upper drum and two lower drums is applicable to the large gas volume. 3. The dust separated and fallen while the waste gas is flowing through the boiler is
Following is a typical waste heat recovery application involving operating conditions relating to a Johnston Boiler Company WHR boiler installation. = 187.28 X $3.58/Gal X 5,256 = $3,523,950.00/Year In this example the Johnston Boiler Company waste heat recovery boiler is capable of reducing fuel costs by as much as: $402.00/Hr $9,655.00/Day
In some cases, such as industrial furnaces, efficiency improvements resulting from waste heat recovery can improve energy efficiency by 10% to as much as 50%. Captured and reused waste heat is an emissionfree substitute for costly purchased fuels or electricity.
WASTE HEAT RECOVERY BOILERS - Johnston Boiler
Other waste heat sources are difficult to recover because of equipment configuration or operational issues. Applicable Technologies Steam Rankine Cycle (SRC) – The most commonly used system for power generation from waste heat involves using the heat to generate steam in a waste heat boiler, which then drives a steam turbine.
The first step in reducing waste heat in flue gases requires close attention and proper measures to reduce all heat losses associated with the furnace. Any reduction in furnace heat losses will be multiplied by the overall available heat factor. This could result in much higher energy savings. The multiplier effect and available heat
Oversurfacing or turn-down requirement on upstream equipment so that hot flue gases are bypassed into waste-heat boilers. 4. Turn-down requirement and type of control for waste-heat boiler, particularly if a superheater is included. 5. Increase of steam-drum pressure up to relief-valve setting.
Waste Heat Boiler - an overview | ScienceDirect Topics