The development in the sulphuric acid industry is going towards less maintenance stops, preferably running for 28-36 months. One of the criteria plants should asses continuously is the ash level in the liquid sulphur. Screening of the expensive catalyst is one important reason for stopping the acid plant. The various types of catalysts will give...Continue Reading

Process optimization with self-cleaning candle filters. A producer of herbicides was investigating a plant optimization in which filtration played an important role. The process included a continuous reactor and the products were filters on a belt filter to recover the product, which was a solid end product. The mother liquor was recirculated back into the...Continue Reading

Ashes entering the converter interferes with the formation of SO3. In a sulphur burning plant, sulphur filters usually catch the blame. A “polishing filter” can solve this problem. However, in numerous inspections of sulphur melting plants, Sulphurnet has discovered that it is not the filtration that is causing the problem. Process design and operation procedures...Continue Reading

Main filtration cake from ideal pre-coat Now that we understand the 3 main possible outcomes of the pre-coat layer, we must understand these are the worst and best possible scenarios, these possibilities are in a line from low flowrate to high flowrate. This means that you can find any deviation in along this line, knowing...Continue Reading

How the filtration flow rate affects the filter internals and what happens to the particles in the different scenarios? Believe it or not, the flow rate, especially in the pressure leaf filter, is a very critical point. Flow rate control must be continuously improved along the rest of the filtration system. The filter cake, the pump...Continue Reading

Many sulphur-burning plants are plagued by high ash content levels, which contaminates both the waste heat boiler and the catalyst bed in the acid plant’s converter. The answer to this problem is installing a liquid sulphur polishing filter after the pressure leaf filter. The liquid sulphur polishing filter with ceramic elements will drastically improve the run time of...Continue Reading

Good filtration performance begins with high quality filter Leaves. We will help you to find the perfect design for your needs. We make custom designed filter Leaves for all filter brands. We are now offering extra frame thickness for free; 2 mm instead of 1,6 mm which has many advantages. Benefits of 2 MM Frame: Sturdy,...Continue Reading