k18 (4)

Domestic Heating Steam

The simplest form of 'DIESECON' exhaust gas boiler consists of a steam generator section only, to produce dry saturated steam for heating services. Water is circulated from the SPANNER boiler through the steam generator section and then returned to the steam space as water/steam mixture at saturation temperaturę (fig. 1). It is generally accepted and morę economical to utilise the auxiliary boiler steam space for steam separation but a separate steam receiver can be supplied if necessary.

When steam requirements are high in relation to reduced waste heat potential from fuel efficient engines heating steam can be maximised by adding an economiser section above the steam generator, thereby extracting morę steam from the heat available (fig. 2).

This is achieved by feedwater entering the economiser below saturation temperaturę allowing a reduction of the exhaust gas temperaturę below the saturated steam temperaturę.

Where it is desirable to take advantage of the waste heat available from auxiliary diesel sets the steam raising units can easily be incorporated into the existing main engine waste heat steam system.

Power Generation with Single Pressure System

For turbo-generator duties the simple waste heat recovery system is the single pressure arrangement (fig. 3 and 4).

With this type of 'DIESECON' it is necessary to add a superheater section to the economiser and steam generator sections all manufactured within the same framework and casings.

Prior to entering the economiser section the feedwater is mixed with recirculating water at saturation temperaturę to ensure a sufficiently high water inlet temperaturę which protects the economiser heating surface from acid dew point corrosion. Superheated steam is utilised for turbo-generator i duties in addition to saturated steam for heating services.