Schematic diagram of the fuel-water emulsifying plant

Fuel-water emulsifying plant

Advantages

• Reduction of the emission of nitric oxides
• Reduction of the blackening rate
• Control of the portion of water by the operating parameters
• Can be easily installed subsequently
• No modification of the injection system
• Applicable for stationary or mobile use

Description

The use of water as fuel additive offers a way to drastically reduce the emission of nitric oxides (NOx) and soot.

For this reason, WTZ Roßlau introduces a newly developed fuel-water emulsifying plant. By this plant, it is possible to fulfil applicable limits of exhaust-gas emissions.

The unconventional action to add water to a fuel in an improved mix formation causes a decrease of the peak temperatures in the combustion zone by the evaporation of the water. The formation of nitric oxides is reduced by a decrease of the reaction speed. To provide the water in the combustion chamber, several solutions have been tested. A very efficient way is the insertion of a fuel-water emulsion.

Therefore a fuel-water emulsifying plant has been developed in WTZ Roßlau. It generates an emulsion of good fineness, homogeneity and sufficient stability without the addition of any emulsifiers. The plant is compact and can be easily installed subsequently. Its operation is controlled by the engine parameters. The control unit consists of electronic micro-controller components with implemented program, sensors for speed and pressure upstream the cylinder and a dosing system. The currently required water throughput is calculated in relation to the capacity. By process optimization, comparable NOx values can only be obtained with unreasonable losses in efficiency and a severe increase of other pollutants.

The newly developed plant has significant advantages:

Depending on the operating parameters of the engine, a stable emulsion is mechanically generated immediately upstream of the fuel pump. This emulsion is fed to the existing injection system without any further modification. The emulsion is injected in the combustion chamber through existing conventional nozzles. Thus the technical modifications at the engine required for the subsequent installation of the plant are small. Fields of application for the installation of the emulsifying plant are diesel engines, vegetable-oil engines, or heavy-oil engine, for example for stationary, marine and locomotive operation.