Fired Heaters, including Ethylene Furnaces, have the greatest running cost on your site. If any one of these heaters is 1 or 2% inefficient it can consume an additional $1m in fuel over a year or result in $millions in lost revenue.
IGS Ethylene Furnace Solutions deliver:
High-Emissivity Ceramic Coatings for Refractory Surfaces
Cetek has seen a distinct benefit in treating refractory surfaces with a high emissivity ceramic coating, increasing the radiant heat transfer inside Ethylene Furnaces over design. The coating increases refractory emissivity which results in a significant increase in hydrogen production at the same process parameters.
Ethylene Furnaces are operated at a high process outlet and flue gas temperature, so radiant tubes (or catalyst tubes) are not manufactured from steel alloys found in refinery fired heaters, but from 25% Cr; 20% Ni, or high Ni steels, such as HL40. These metallurgies form an oxide layer when subjected to high temperatures, but unlike regular steel alloys, this layer inhibits further oxidation of the tube and further scale growth is prevented.
Engineered Convection Section Cleaning
Tube Tech’s Ethylene Furnace convection section cleaning service is recognised by world-leading refining and petrochemical companies as the most effective technology to achieve OEM performance clean fired heaters.
95% clean guarantee even on the most fouled assets
Ethylene Furnace fouling is a costly problem for refineries around the world. Heater intake collects 1 ppm airborne particulate whilst in service, which results in deposits of 2.5 tonnes over 12 months either landing in or travelling through the heater.
These deposits most commonly land:
Fouling results in:
Tube Tech’s Ethylene Furnace convection section cleaning service is recognised by world-leading refining and petrochemical companies as the most effective technology to achieve OEM performance clean SMRs.
Traditional cleaning methods are only able to clean 30-45% of the total fouled area. Tube Tech, backed by multi-million-dollar European funding, has developed a Rover system that penetrates deep between tube rows to remove even the most stubborn fouling.
Online Maintenance & Emergency Services (During the Heater’s Normal Operation)
Hot-tek™ is the industry leader in hot maintenance and online Ethylene Furnace repair and cleaning techniques and holds multiple patents on the approach, methods, and tools used to carry out these services. The approach is customized for every client’s needs. Often, multiple Hot-tek™ Services are employed simultaneously during an application to achieve the best results.
Failure of refractory material can lead to energy wastage, poor performance and even complete shutdown of your Ethylene Furnace.
Hot Refractory Repair Services may be made gaining access through the heater steel shell directly behind the damaged area. Minimal openings are used to insert specially designed components to support the repair material. This technique offers a semi-permanent repair method lasting at least until the next planned turnaround.
Low steam production, low process pre-heat, and high stack temperatures are some of the symptoms of fouled tubes within a convection section.
Fouling results in:
Hot Convection Cleaning process removes convection section tube fouling & scale during furnace operation. The tube cleaning process uses consumable abrasive media projected through specially designed application lances to blast away years of accumulation, while the heater is in service.
This emergency or intermediary solution prevents losses associated with taking the heater offline. However, we advise a Planned Preventative Maintenance (PPM) approach, and our Tube Tech service provides industry-leading offline cleaning services to prevent emergency cleaning situations.
Sometimes, an issue can arise in high temperature fixed equipment, but you can’t see the cause or the exact location of the problem. We designed and developed Cetek’s Lancescope™ heater inspection tool for just this situation. It allows a high-temperature furnace inspection to be carried out to determine the scope of the problem, often avoiding an expensive shut down of the heater.
Cetek’s Lancescope™ system provides real-time, close-up, or wide-angle views of virtually any area inside a fired heater, or other high-temperature equipment while it is still in operation.
The hot inspection system uses a state-of-the-art digital camera system, which provides clear, detailed images of problem areas up to 3000°F (1650°C). The furnace inspection system can be inserted into openings as small as 2.75” (7cm) and reach up to 30ft (10m). In applications below 1000°F (540°C), the heater inspection system provides illumination via a high-temperature light source for optimum clarity.
Thorough inspection provides data needed for other Hot-tek online services.
Over time, debris such as ceramic fiber inorganic dust and combustion by-products entrained in the flue gas accumulate on the upstream face of the SCR catalyst. This debris hinders gas flow through the catalyst increasing the pressure drop across the SCR unit. To overcome this effect, the induced draft fan utilization must be increased consuming extra energy. After the fan has reached max capacity, production must be reduced to decrease the pressure drop across the SCR.
IGS’ Hot Vacuum Service cleans catalyst banks in SCR units to Ethylene Furnaces and other fired heaters. SCR catalyst banks are cleaned during operation with no interruption to production, offering a rapid payback on associated costs.
Our online SCR catalyst cleaning service removes pluggage and fouling from SCR screens, immediately improving catalyst reduction system efficiency.