Wood Gasification

Wood Gasification
Electrifying the future!

Lecture: Process Engineering





Table of Content:


I. Abbreviation, Translation and Glossar 4
1.0. Introduction 5
2.0. History of wood gasification 5
3.0. Technology basics of wood gasification 6
3.1. Aim of wood gasification 6
3.2. Process of wood gasification 7
3.2.1. The drying 8
3.2.2. The pyrolysis 8
3.2.3. The oxidation 9
3.2.4. The reduction 10
4.0. Carburettor types 12
4.1. One way gasifier 12
4.1. Counter-flow gasifier 14
4.3. Fluidized bed gasifier 16
6.0. Processing of the gas 17
6.1. Cleaning of the gas 17
6.2. Cooling of the gas 18
7 Profitability of wood gasification plants 18
7.1. Efficiency 18
7.2 The net present value method 19
7.3 Investment cost of the plant 19
7.4. Fuel costs 20
7.5. Maintenance costs 21
7.6. Personnel expenses 21
7.7. Revenues from electricity and heat sales 22
7.7.1 Revenue from electricity sales 22
7.7.2 Feed 22
7.8. Efficiency 23
7.9. Availability 24
7.10 Proceeds from sale of heat 25
7.11. Conclusion efficiency. 26
8. Conclusion 27

Figures:

Figure 1: Equilibrium curve at the carbon gasification. 11

Figure 2: Functioning of a one way gasifier. 13

Figure 3: Functioning of a counter-flow gasifier. 15

Table 1: Overview of the gasifier types 17

Figure 11: Influence of fuel cost on the capital value 21

Figure 12: Payments for electricial energy 23

Figure 13: Efficiency of gasification plants 24

I. Abbreviation, Translation and Glossar

NawaRo nachwachsende Rohstoffe
fixed bed gasifier Festbettvergaser
fluidized bed gasifier Wirbelschichtvergaser
one way gasifier Gleichstromvergaser
counter-flow gasifier Gegenstromvergaser
block-type thermal power station Blockheizkraftwerk (BHKW)
EEG Erneuerbare Energien Gesetz
gasifier & carburettor Vergaser

1.0. Introduction

Ever since the introduction of the new EEG in 2004 and the related...