BioMatNet Item: JOULE JOR3-CT97-0166 - Turbulence chamber gasification with combustion-optimised gas engine and turbulence chamber treatment (development of components)

[BioMatNet Database - European Commission]

JOULE JOR3-CT97-0166
Turbulence chamber gasification with combustion-optimised gas engine and turbulence chamber treatment (development of components)

Contacts

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JOULE/THERMIE Programme : Thermochemical Conversion

	Type of Project	Shared Cost
	Contract No	JOR3-CT97-0166
	EC Contribution	1,200,000 ECU
	Start Date	01/10/97
	Duration	30 Months

Turbulence chamber gasification with combustion-optimised gas engine and turbulence chamber treatment (development of components)

Objectives

The main objective is the development of a novel biomass gasifier system for the middle and low capacity range (100 kW_e.), with operating characteristics lying between those for a circulating fluidised bed and those for a jet flow reactor. The aim is to produce a gasification process in which the tar and naphthalene contents are as low as possible. The newly developed gas engine is expected to be capable of handling certain amounts of these contaminants in the gas. The system will also be capable of coping with the high carbon monoxide content of the gas produced in order to avoid the high slip of this component in the combustion process. When coupling the individual systems to a plant for the combined generation of heat and power (CHP), the residual combustible gaseous (CO) and solid (coke) components are expected to be treated in an additional combustion process, the turbulence chamber treatment. The purpose of this component is to meet the regulations for flue gas and solid wastes.

Technical Approach

After preliminary design calculations of the turbulence chamber gasification reactor (TCG) and the turbulence chamber treatment (TCT) testing of the hydrodynamics on cold model basis will help to improve the geometry of the reactor. At the same time the cylinder head of the gas engine will be designed applying simulations of heat transfer and fluid dynamic models.

Development and construction of the TCG, TCT and gas engine will be supported by simulation and modelling tools. The individual components will then be tested independently for optimisation procedures. Experimental data from tests with a one-cylinder engine will be employed for the development of a four (6) cylinder gas-engine.

Geometrical variations of the primary and secondary TCG reactor will help to find an optimised design. A four (6) cylinder gas engine will also be constructed and tested during this stage.

The last stage of the project will evaluate the test results to establish whether the components developed are suitable for coupling to form a complete combined heat and power generation plant in the capacity range of 200 to 500 kW_e

Expected Results

This project aims to develop a TCG with a total naphthalene and tar content in the produced gas lower than 100 mg/m³ and a dust content lower than 30 mg/m³. These experiments will give an indication of the range of tar and dust content in the producer gas that can be reached in the gasifier whilst maintaining the reliable operation of the gas engine. Optimised operating parameters will be determined for both the gasification process and the gas engine.

The purpose of the Turbulence Chamber Treatment is for the additional utilisation of solids (char) and gaseous combustible components (CO) whereby it is aimed to reach carbon monoxide levels of less than 250 mg/m³ in the flue gas and remaining carbon residues in the ash of less than 5%.

Contacts

Coordinator

Reinhard ECKERT / Dipl Ing G Pruflung GmbH GERMANY

Participant