eliminates a profound source of NOX. In contrast, all the N2 bound in the solid wastes is converted into the oxides of nitrogen (NOx), which is a major link in the greenhouse gas production. The syngas produced from the solid waste has a calorific value of 850 to 1100 KCal/Nm3 compared to 8000 KCal/Nm3 for natural gas. When natural gas is utilized as fuel, the flame temperature is approximately 2200 oC. In contrast when fuel gas from Rotary Kiln Gasification is utilized as fuel; the flame temperature is less than 1500oC. Hence, the thermal NOx produced by syngas is an order of magnitude less than that from natural gas, because of the lower flame temperature. This is also an important environmental consideration in country’s continuous quest to reduce the emission of greenhouse gases from all sources. The sulfur likewise is removed from the fuel gas in the form of solid sulfides prior to its use, thereby further adding to the cleaner environment mandate.
SCIENTIFIC
GASIFICATION SYNGAS
Agriculture
BOILER
STEAM
Petroleum
GASIFICATION
Figure 1: Schematic of the Rotary Kiln Gasification System Figure 1. Schematic of the Rotary Kiln Gasification System
There will like like ash, ash, which which will be will initially planned into a scientific and There will be beother otheroutputs outputs be initially planned into landfill a scientific subsequently after analyzing the ash for its worthiness; it could be sold to cement factory; generating landfill and subsequently ashincludes for its the worthiness; could be sold additional revenue. The designafter of theanalyzing gasificationthe system preliminary itplant design for converting 2 TPD of non-hazardous wastes into clean fuel gas and the subsequent utilization of the syngas to cement factory for making fly ash bricks; generating additional revenue. The as mentioned above.
design of the gasification system includes the preliminary plant design for converting The design is carried out in sufficient details to enable accurate determination of the cost for the plant 2components TPD of non-hazardous wastes into clean fuel gas and the subsequent utilization of and comprises of: the syngas as mentioned above. • Process Flow Diagram • Process Description for the plant 2TPD 190821 Page 5 of 11 • Heat and Mass Balances and Potential Energy Output • Utility Requirements • Equipment list and specifications The overall material balance at the various components is shown in Figure 2. The 2 TPD Waste to energy system consists of 5 subsystems. These subsystems are 1) Feed Subsystem; 2) Gasifier Subsystem; 3) Gas
