Flokal-Engineered products for the modern industry

Precombustion Unit

For the use with the Disintegration System V5 according to the Wickbold Method and the Multi Usage Combustion Burner UVE

Disintegration according to Wickbold
The function of the hydrogen-oxygen combustion apparatus V5 is to disintegrate solid, gaseous and liquid organic samples for the subsequent determination of principally halogens and sulphur, but also of mercury, arsenic, and selenium. Over the years it has proven itself in the field with regard to operational safety and reliability.

The electrically heated precombustion unit VE optimizes the precombustion by providing a targetable and
controllable preindneration in a semimonocoque tubular oven.
The operating comfort and the disintegration quality of the combustion of solid or pasty samples as well as liquids contaminated with solids is further improved with the use of the new UVE Mullt Usage Burner.

Optimized Disintegration according to the Wickbold method for liquid, solid and pasty samples by electrical heated Pyrolysis with VE Apparatus and Multi Usage Combustion Burner.

The advantage of the Multi Usage Combustion Burner UVE is the possibility of determining liquid, solid and pasty samples with one burner only without mounting or dismounting of the VE precombustion unit. This is realised with a new Multi Usage Burner which guaranties that the sample is always flowing vaporously into the H₂/O₂ flame. This result is obtained by using the precombustion oven VE as a way of thermal vaporization which warrants that the substance stays in the hot zone long enough to supply the H₂/O₂ flame with its vaporous state.

Through the special construction of the system the quartz glass burner is protected to a large extent from attacks by alkalis which often leads to destruction by re crystallization. With the help of a crucible, carrying the sample boat in it, the resting time in the hot zone is increased in such a way that the H₂/O₂ flame is always supplied with the sample in its vaporous state what minimizes direct damage of the combustion burner by substances damaging quartz glass.

Organic deposits in the combustion capillary are prevented by a precombustion of the vaporous substance by mixing with O₂ which is supplied at the side of the burner and thereby produce a precombustion flame in the burner.

The completeness of the determination is improved because this substance, having been burned in advance, reaches the H₂/O₂ flame as a turbulent O₂ mixture. This mixture burns to an extremly high degree what guarantees an optimal combustion and, thereby, a complete determination.

The advantages of this multi usage determination system are:

No mounting or dismounting of the VE unit when changing from solid/ pasty to liquid samples and vice
versa.
Samples are transfered always in the vaporized state into the Uif O2 flame.
Protection of burner from recrystallization.
Effective precombustion under Oj.
Avoidance of condensate formation in burner and capillary.
Big and turbulent hydrogen/ oxygen flame and, therefore, better conditions for determination.

Multi Usage Combustion Burner UVE
for solid/ pasty samples

Retrofitting Existing Equipment

Connection of thie VE unit is already provided for all V5 apparatus equipped witti the VE modification unit MVE.
Ttiis is true for all V5 Instruments including and after ttie instrument no. 375, built in 1988.

Older models can be retrofitted wittiout problem: The modification unit MVE can be subsequently built into the V5 combustion apparatus.