Ceramic inlet cones for TLEs on steam cracking furnaces, as one piece or as segmented assemblies.
The cone between cracking coil and exchanger, cast before the outage.
Set it, close the exchanger, and skip the cure out.
The inlet cone of a transfer line exchanger is protected by a refractory lining between the hot cracked gas and the steel, traditionally a castable cast in place. Blasch replaces that castable with precision cast, abrasion resistant ceramic cones, as single piece replacements or as segmented multi-component assemblies, with thin walls and good thermal shock resistance. The cones arrive fully fired, so no cure out is required and the furnace goes back into service sooner.
In a steam cracking furnace the transfer line exchanger, or TLE, sits right after the radiant coil outlet and cools the cracked gas within moments. The inlet cone is the transition that spreads the gas from the outlet pipe across the exchanger tubesheet.
The refractory in that cone sees the hottest gas in the exchanger, large temperature swings at every start, stop and decoke, and particles carried in from the coil. A lining that cracks or wears changes the flow onto the tubesheet and exposes the steel behind.
Each repair of a cast in place lining means forms, anchors, placing, curing and a controlled dry out, all on the critical path of the furnace outage.
The same cone can be lined two ways. The difference shows up in the outage schedule and in the next repair.
A cone that arrives fired takes curing and dry out off the critical path, so the hours of the outage go into the exchanger, not into waiting for refractory.
All shapes and sizes are made to the inlet of the exchanger they go into. Dimensions of the existing cone are enough to start.
One cast part that replaces the full lining of the cone, where size and access allow it to go in whole.
Several precast components that fit together inside the cone, for large inlets or limited access.
Ferrules protect the tube inlets at the tubesheet of the same exchanger type and other waste heat boilers.
Precast refractory shapes carry less mass than a cast in place lining, can be taken out for inspection, and save the days a castable needs to cure. Precast refractory shapes
Blasch supplies steam cracker operators with TLE cones, ferrules and burner parts designed for the conditions of each furnace. Refining and chemical processing
Other high temperature process parts in this group are reactor vessel linings and impingement block linings. The full range is on wear products.
No. It is fully fired before delivery, so there is no cure out on site and the furnace can return to service once the exchanger is closed.
That depends on the size of the inlet and the access during the outage. Both are made to the dimensions of the existing cone.
No. The inlet dimensions and the operating conditions are enough for a Blasch engineer to design the cone.
Send the inlet dimensions of your exchanger and how the current lining fails. A Blasch engineer designs a precast cone for that inlet.
