At the heart of every liquid sulfur melting and filtration plant, a filter is installed. In most installations, a liquid sulfur filter is used to remove impurities caused by both transportation and the reaction between Lime and Sulfuric Acid.
Sulphurnet’s Liquid Sulfur filters can be divided into three categories. The first of these is primary liquid sulfur filtration. Most often well-known filters such as the pressure leaf filter and self-cleaning candle filter are used for the primary filtration of liquid sulfur. These filters operate using a layer of precoat material to remove contaminants for the liquid sulfur stream and if implemented correctly, already give a satisfactory result for most liquid sulfur filtration processes.
The second type of liquid sulfur filtration category is the liquid sulfur polishing. For this type of filtration, a liquid sulfur polishing filter is used. A liquid sulfur polishing filter is used in case even the finest of particles need to be removed. Most commonly the liquid sulfur polishing is installed directly after a primary liquid sulfur filter.
The third type of liquid sulfur filtration is coarse filtration. For some processes, fine filtration such as in the liquid sulfur filter and the liquid sulfur polishing filter is not required, but the removal of bigger particles is required. For these applications, Sulphurnet offers liquid sulfur strainers in various sizes.
Sulphurnet over the years has designed many liquid sulfur filters for various flows and solid loads.
The Liquid Sulfur Filter removes contaminants, such as ash and bitumen, which can plug the catalyst mass downstream in the Converter.
Some of the advantages are:
•Decreases maintenance costs and improves the operation time of the plant
•Reduction of contamination reduces the acidity of the sulfur and reduces corrosion
•Retractable tank and fixed cover, no need to disconnect pipelines for cleaning procedures.
•Filter leaves remain stationary, with no cake dropping during the opening
•Quick closure with long gasket lifetime
•Filter leaves with a double “O” ring to prevent by-pass
•Fully hydraulic operation
•Tailor-made to your specifications
The primary purpose of the Liquid Sulfur Candle Filter (LSCF) is to achieve the most optimal filtration results and to remove any remaining contaminants from the sulfur. A filtration efficiency as low as 5 ppm can be achieved.
Benefits for Sulfuric Acid Plants:
•Reduces pressure build-up in the sulfuric acid plant
•High filtration efficiency, protects the catalyst
Process advantages:
• Reduces maintenance costs and operational losses of the acid plant
• Can also be installed in existing plants
• Automated cleaning
• Fine filtration at the sub-micron level for acid plants/catalyst protection
• Closed systems, no emissions
The primary purpose of the Liquid Sulfur Polishing Filter is to remove the last contaminants such as filter aids, ashes, etc, that might plug the catalyst mass.
The removal of solid contaminants reduces pollution of the waste heat boiler and pressure build-up in the converter downstream in the acid plant. This to decreases maintenance costs and improves the operation time of the sulfuric acid plant.
The primary purpose of the Liquid Sulfur Strainer is to remove unwanted particles from the liquid sulfur, without manual intervention or dangerous situations.
Benefits
•Suitable for industrial applications requiring reliability and continuous operation.
•Can be used for pre- or final filtration within a 30-1000 micron range.
•Simple construction eliminates the need for external assistance.
•Easy-to-change sealing box facilitates customization.
•No lubrication required, minimizing maintenance.
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