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BW Energy Optimisation

BW Energy Optimisation
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This solution is applicable to processes with 85 to 90% condensate return, and steam production above 15 t/h. The principle is to heat the combustion air up to a temperature of 80ΰC. This limit is imposed by the thermal NOx generating threshold. The efficiency increase is 6 to 8%. The investment can be recovered in less than 2 years*. Low-NOx burners 4/ Flue-gas economiser, plus water / combustion air exchanger. BABCOCK WANSON investment in R&D has enabled the development of a new burner head geometry which: improve the distribution of the fuel within the flame reducing the production of NOx ; Օ reduce the excess of air increasing the efficiency of the boiler. To make: fuel savings Օ reduced electrical consumption low level of flue gas pollutants Օ reduced noise reduction in operating costs 3/ Flue-gas economiser plus heat exchanger on the feed-water. This solution provides a boiler efficiency of up to 96%. Certain conditions are neces-sary in order to apply this process: the presence of a thermal de-aerator and a cold feed make-up source, and a low condensate return rate of less than 70 %. The investment can be recovered in less than 1 year* ; Babcock Wanson offers many optimi-sation solutions, particularly the Ecosteamծ pack Audisteam software ΂ suitable for the BWSand BWR series. Thanks to the new , BABCOCKWANSON can help to value the potential savings and highlight the best solutionsfor industrial. This solution, which is suited only to gas, provides an efficiency increase of 4 to 5 % depending on the temperature of the feed-water. The return on investment may beobtained in less than 1 year* ; This solution is applicable for NG / fuel-oil combined-fuel applications, or if greater energy recovery is required. In this case, the economiser has a larger exchange surface and can no longer be incorporated in the rear smoke box. The efficiency increase is 5 to 6 % ; Flue-gas economisers 1/ Flue-gas economiser, removable cartridge exchanger mounted in the rear smoke box of the boiler. 2/ Flue-gas economiser, casing-mounted on the flue-gas outlet. Electronic fan speed control * These value varies according to the size and annual operating time of the boiler suppression of interference on the electrical network at start up, Օ significant reduction of noise level at low load, reduced maintenance by replacing the fan pulleys and belts with a direct driveՕ reduced electrical power consumption:by reducing the fan speed by 20%, the air output is also reduced by 20%, but the electrical powerconsumption is reduced by 50%. Substantial reductions in operating and maintenance costs. >

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Re-injection of condensate into the boiler with zero flash The aim of re-injecting the condensate under pressure is to keep them at a high pressure and temperature in order to save maximum heat energy. The installation will include a re-injection drum under pressure and a feed pump. The regulation of the boiler water level is done with the condensate plus water coming from the feedwater tank. Depending on the operating conditions (return rate, pressure and temperature of the condensate - boiler output) the operating analysis shows an energy saving of 15 to 35% and a saving on water...

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