Desilter Cyclone & H2s Scrubber Uses – An Overview In Detail And H2s Scrubber Uses & Its Importance

What is a Desilter Cyclone?

Desilter cyclone is a necessary third-phase solids control equipment for drilling mud treatment in the oil and gas industry. These machines are used to separate silt and other silt-sized particles from mud. The particles removed are typically in the 15-74 microns size range.

Overall, desilters help decrease the average particle size and eliminate abrasive particulate matter (grit) from the drilling fluids.

Principle

Cyclones help remove solid particles from fluids by using centrifugal force. During operation, solids fall outwards because they are heavier, while the fluid moves upwards through the pipeline. Meanwhile, particulate solids are eventually pushed downwards into an accelerating spiral.

Installation and setup

In terms of the sequence of installation, desilter cyclones come after shale shakers, degassers, and desanders – the other solid separation machines on an oil rig.

The diameters of the mud inlets and outlets are typically fixed at 2’’, making the desilter cyclone a conical device. The fixed inlet and outled diameters also give the desilter cyclone an easy-to-maintain clamp design. The drilling mud enters the desilter cyclone at the end with the maximum inner diameter.

Multiple desilter cyclones can be installed together in a desilter unit to maximize mud flow capacity and achieve high throughput. A good desilter cyclone design will allow the user to separately remove and inspect each individual cone from the desilter cyclone cone manifold.

Desilter cyclone variety

To ensure optimum functionality, the geometry and make of a desilter cyclone are crucial aspects to consider. Desilter cyclones come in various sizes, with inner diameters of 2’’, 4’’, 5’’ and 6’’. The most commonly used desilter cyclones in the oil and gas industry are the ones with the 4’’ and 5’’ inner diameters.

The cones of desilter cyclones are typically made of materials that offer a high wear resistance, such as polyurethane. Note that using a cone with a high volume can help minimize plugging of the equipment.

Further, desilter cyclones can be designed to reduce mud loss on an oil rig. Using cone apex inserts of different sizes, depending on the situation, can help reduce mud loss.

https://kapwell.co.uk/products/hydrocyclones/desilter-hydrocyclones/

What is an H2S Scrubber?

A hydrogen sulphide (H2S) scrubber, as the name suggests, removes H2S from gas streams. H2S scrubbers are specific only to H2S, so they do not remove any other component of the gas stream.

Principle

H2S scrubbers operate by facilitating an interaction between the target gas (H2S) and a liquid reagent capable of removing it. H2S reacts with the liquid reagent to form an insoluble or easily-removable product.

Why is an H2S scrubber necessary on an oil rig?

H2S scrubbers eliminate harmful and foul H2S fumes, keeping the oil rig staff safe and maintaining the plant’s productivity. Moreover, H2S can react with steel and corrode the surface of the gas pipes. Therefore, H2S scrubbers also prolong the life of oil rig equipment.

H2S scrubber variety

H2S scrubber tubes are typically 1-2.5 inches in diameter and 6-24 inches in length. These devices can be made from a number of materials, including metallic materials such as stainless steel, titanium and nickel-based alloys, or polymeric materials such as polyethylene, polypropylene and polyvinyl chloride.

H2S scrubbers can utilize three different types of H2S removal reagents – water-soluble, oil-soluble, and metal-based. The choice of the removal agent depends on the application, temperature, and the load of H2S in the gas stream.

Water-soluble reagents are suitable for applications at lower temperatures (under 200°F), including in flare gas decontamination. Examples include sodium hydroxide solutions. Oil-based (amine-based) reagents for H2S removal are suitable for high temperature applications. Meanwhile, metal-based H2S-removing agents are well-suited for ultra-high-temperature environments where H2S concentrations are high and asphalt may be involved. https://kapwell.co.uk/products/oil-and-gas-separators/h2s-scrubber/

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