Department of Civil and Chemical Engineering

Laboratory Civil and Chemical Engineering

Gasification

Figure 1. Sawdust

Gasification is a process in which the biomass is heated at higher temperature with controlled oxygen to produce a fuel gas with minimum amounts of liquid and solid products. Pyrolysis is the thermal breakdown of a biomass material in the absence of oxygen. Pyrolysis and gasification methods have emerged to address these issues and improve the energy output.  A gasification pilot plant have been widely  using  different feedstock as biomass , coal, petcoke, plastic waste, Refuse derivate fuel (RDF), saw dust and mixtures in a homogenous, constant and reproducible way even at pressure conditions. Sewage sludge and municipal solid wastes have been also used in this process. Air, oxygen, steam or mixtures of them may be used as gasifying agents.

Sawdust or wood dust is a by-product or waste product of woodworking operations such as sawing, milling, planning, routing, drilling and sanding. The use of sawdust offer the best technical, economic and environmental alternative.

Fig 2. Refuse-derived fuel (RDF)


Refuse-derived fuel (RDF) is a fuel produced from various types of wastes such as municipal solid wastes (MSW), industrial wastes or commercial wastes. MSW includes combustible and non-combustible wastes that come from household, municipal, commercial, and industrial sites.

Figure 3. Plastic waste

RDF is a value added material with a higher calorific value and a homogeneous particle size. 

Gasification in fluidised bed is shown as an interesting alternative to plastic waste exploitation. The gasification which have been studied using different feedstock as coal or biomass, can be also used with plastic waste to generate gas with high hydrogen content or synthesis gas.

To operate the desired FIC control loop, touch its MFC icon on the main process screen and gas, liquid & react screen will open.

This screen will also contain the Set Point and Process Variable boxes, along with a text showing the name of the control loop. The default names are FIC 01 to FIC 05.  

Click on the SIC02 text box on the middle left side of the main screen.

Open the Process@ software.

Set the frequency on SIC01 to 45Hz and the frequency on SIC03 to 50Hz. SIC03 must be in AUTO mode (MD). To change it to automatic mode, click on the green “M” icon under the SIC04 text box. The icon should change to a red “A”

                   

SECTION DESCRIPTION 1 Gas feeding section 2 Liquid feeding section 3 Solid feeding section 4 Preheating 5 Reaction 6 Gas cleaning system 7 Cooling system 8 Electrostatic Precipitator 9 Scrubber section 10 Gas measuring section 11 Gas Compression System

Last modified: 2018/05/04