Abstract: An electric air heater system including a first electric air heater module. The first electric air heater module including an outer casing having an inner surface, a first end, and a second end; a refractory insulation layer in tight communication with the outer casing; an inner cavity within the refractory insulation layer; and a plurality of tubes extending through the inner cavity from the first end to the second end, the plurality of tubes each having an exterior surface. Each tube is fixed relative to the outer casing at the first end, and each tube has an electrical connection disposed at the first end. The plurality of tubes is arranged into one or more bundles of tubes, where each bundle includes two or more tubes having a plurality of fins extending radially from the exterior surface, and a heating element axially through a hollow interior of the tube.

Abstract: Processes and systems for converting waste plastics include feeding a waste plastic to a melt tank, and in the melt tank, heating the waste plastic to form a molten plastic. The molten plastic is withdrawn from the melt tank and fed to a pyrolysis reactor. In the pyrolysis reactor, the molten plastic is heated to a pyrolysis temperature, producing a pyrolysis oil product and a liquid pitch product. The pyrolysis oil is then separated into a pyrolysis gas fraction, a light pyrolysis oil fraction, a medium pyrolysis oil fraction, and a heavy pyrolysis oil fraction.

Abstract: A heat exchanger system includes a rigid framework. A first heat exchanger may be coupled to a first support structure on a top of the rigid framework. A second heat exchanger may be positioned below the first heat exchanger. The second heat exchanger may be coupled to a second support structure. The second support structure may hang from the rigid framework via a first set of tethers. The first set of tethers may be configured to vertically and horizontally move the second support structure. The vertically and horizontally movement of the second support structure may be based on a thermal expansion of the second heat exchanger.

Abstract: A system may include a turbine and a recuperative heat exchanger system. The recuperative heat exchanger system is configured to receive exhaust gases from the turbine. The recuperative heat exchanger system may include a precool section to cool the exhaust gases, a major heating section to receive the cooled the exhaust gases, and a minor heating section to receive the cooled the exhaust gases.

Abstract: A system may include a turbine and a recuperative heat exchanger system. The recuperative heat exchanger system is configured to receive exhaust gases from the turbine. The recuperative heat exchanger system may include a precool section to cool the exhaust gases, a major heating section to receive the cooled the exhaust gases, and a minor heating section to receive the cooled the exhaust gases.

Abstract: A system may include a turbine and a recuperative heat exchanger system. The recuperative heat exchanger system is configured to receive exhaust gases from the turbine. The recuperative heat exchanger system may include a precool section to cool the exhaust gases, a major heating section to receive the cooled the exhaust gases, and a minor heating section to receive the cooled the exhaust gases.

Abstract: A system may include a turbine and a recuperative heat exchanger system. The recuperative heat exchanger system is configured to receive exhaust gases from the turbine. The recuperative heat exchanger system may include a precool section to cool the exhaust gases, a major heating section to receive the cooled the exhaust gases, and a minor heating section to receive the cooled the exhaust gases.

Abstract: A heat exchanger system includes a rigid framework a rigid framework. A first heat exchanger may be coupled to a first support structure on a top of the rigid framework. A second heat exchanger may be positioned below the first heat exchanger. The second heat exchanger may be coupled to a second support structure. The second support structure may hang from the rigid framework via a first set of tethers. The first set of tethers may be configured to vertically and horizontally move the second support structure. The vertically and horizontally movement of the second support structure may be based on a thermal expansion of the second heat exchanger.

Abstract: A system may include a turbine and a recuperative heat exchanger system. The recuperative heat exchanger system is configured to receive exhaust gases from the turbine. The recuperative heat exchanger system may include a precool section to cool the exhaust gases, a major heating section to receive the cooled the exhaust gases, and a minor heating section to receive the cooled the exhaust gases.