A pulse combustor system for reducing noise and/or vibration levels. The system includes a pulse combustor including a combustion chamber, an inlet pipe, an exhaust pipe, and a first fuel injector for injecting fuel into the combustion chamber. The pulse combustor has a fundamental oscillation mode and one or more additional oscillation modes. The system includes at least one pressure sensor for measuring a pressure inside the fuel combustor and/or a at least one fluid velocity sensor for measuring fluid velocity at the inlet pipe or at the exhaust pipe. A controller adjusts a rate of fuel supply to the pulse combustor if the measured pressure and/or the measured velocity is above a predetermined threshold value to reduce excitation of the one or more additional oscillation modes.

A pulse combustor system for reducing noise and/or vibration levels. The system includes a pulse combustor including a combustion chamber, an inlet pipe, an exhaust pipe, and a first fuel injector for injecting fuel into the combustion chamber. The pulse combustor has a fundamental oscillation mode and one or more additional oscillation modes. The system includes at least one pressure sensor for measuring a pressure inside the fuel combustor and/or a at least one fluid velocity sensor for measuring fluid velocity at the inlet pipe or at the exhaust pipe. A controller adjusts a rate of fuel supply to the pulse combustor if the measured pressure and/or the measured velocity is above a predetermined threshold value to reduce excitation of the one or more additional oscillation modes.

Disclosed herein are processes, apparatuses, and systems for producing chemicals. One system may comprise a wall defining a chamber; a plurality of burners configured in an arrangement within the chamber, wherein each of the burners is supplied with a material and facilitates combustion of the material, and wherein the arrangement defines an inner volume disposed radially inwardly relative thereto; and an injector disposed within the inner volume and configured to introduce a feedstock into the chamber, wherein the plurality of burners provide thermal energy to facilitate thermal pyrolysis of the feedstock.

Disclosed herein are processes, apparatuses, and systems for producing chemicals. One system may comprise a wall defining a chamber; a plurality of burners configured in an arrangement within the chamber, wherein each of the burners is supplied with a material and facilitates combustion of the material, and wherein the arrangement defines an inner volume disposed radially inwardly relative thereto; and an injector disposed within the inner volume and configured to introduce a feedstock into the chamber, wherein the plurality of burners provide thermal energy to facilitate thermal pyrolysis of the feedstock.

One or more embodiments relate to a contactor/separator vessel for reacting with fine particles. The contractor/separator vessel includes a spouted bed containing fine Geldart class C particles; and an additional spoutable media to facilitate spouting of the fine Geldart class C particles in order to improve mixing, gas-solid contact/separation.

A controller is configured to set total stop in which operations of all of a plurality of water heaters are stopped when an abnormal condition of a fan or an abnormal condition in communication is sensed in any of the plurality of water heaters while at least one of the plurality of water heaters is operating. The controller is further configured not to set total stop when an abnormal condition of the fan or an abnormal condition in communication is sensed in at least one of the plurality of water heaters while a sensing element for sensing a backflow of an exhaust from an exhaust path assembly is connected to the controller.

A controller is configured to set total stop in which operations of all of a plurality of water heaters are stopped when an abnormal condition of a fan or an abnormal condition in communication is sensed in any of the plurality of water heaters while at least one of the plurality of water heaters is operating. The controller is further configured not to set total stop when an abnormal condition of the fan or an abnormal condition in communication is sensed in at least one of the plurality of water heaters while a sensing element for sensing a backflow of an exhaust from an exhaust path assembly is connected to the controller.

A furnace and a process for temperature control of a material stream, wherein the furnace has a first combustion chamber, at least one reactor tube for receiving the material stream to be heated, and at least one second combustion chamber. The at least one reactor tube extends through the first combustion chamber and through the at least one second combustion chamber. The furnace is designed to establish a first temperature in the first combustion chamber and a second temperature in the at least one second combustion chamber, wherein the first temperature and the second temperature are separately adjustable.

A crossfire tube assembly is positioned between adjacent combustors, the crossfire tube assembly having a primary body made up of a first telescoping sleeve slidably engaged with a second telescoping sleeve. An interlocking raceway is configured to limit axial travel length of the telescoping sleeves and lock the telescoping sleeves to each other. A bias is positioned between the first telescoping sleeve and the second telescoping sleeve. First and second floating collars are removably disposed to the first and second telescoping sleeves at a first and second floating collar annulus. First and second liner collars are disposed between the first and second floating collars on the first and second combustors. The crossfire tube assembly is adapted to provide fluid communication from the first combustor to the second combustor serving a gas turbine.

A crossfire tube assembly is positioned between adjacent combustors, the crossfire tube assembly having a primary body made up of a first telescoping sleeve slidably engaged with a second telescoping sleeve. An interlocking raceway is configured to limit axial travel length of the telescoping sleeves and lock the telescoping sleeves to each other. A bias is positioned between the first telescoping sleeve and the second telescoping sleeve. First and second floating collars are removably disposed to the first and second telescoping sleeves at a first and second floating collar annulus. First and second liner collars are disposed between the first and second floating collars on the first and second combustors. The crossfire tube assembly is adapted to provide fluid communication from the first combustor to the second combustor serving a gas turbine.