36results about "Combustion cleaning" patented technology

Methods and apparatus are provided for cleaning a surface within a vessel. A fuel / oxidizer charge is provided within a combustion conduit. An initial deflagration commenced in a first portion of the charge produces a final detonation at least in another portion of the charge to expel a shockwave from the conduit which impinges upon the surface. The deflagration-to-detonation transition may be encouraged by mechanical enhancements and / or by making the first charge portion more detonable than the second.

A system and associated method for removing accumulated debris from a surface of a vessel. The system includes an impulse cleaning device defining a combustion chamber in which combustible fuel and air are mixed and ignited to produce combustion that is directed at the surface to be cleaned within the vessel, and an eductor assembly surrounding a downstream end of the chamber for inducting surrounding atmosphere into the combustion to widen the area being cleaned.

Methods and apparatus are provided for cleaning a surface within a vessel. A fuel / oxidizer charge is provided within a combustion conduit. An initial deflagration commenced in a first portion of the charge produces a final detonation at least in another portion of the charge to expel a shockwave from the conduit which impinges upon the surface. The deflagration-to-detonation transition may be encouraged by mechanical enhancements and / or by making the first charge portion more detonable than the second.

A detonation combustor cleaning device includes at least one combustion chamber having combustion flow path and including a deflection member. An ignition device is operatively connected to the at least one combustion chamber is selectively activated to ignite a combustible fuel within the at least one combustion chamber to produce a shockwave that moves in a first direction along the combustion flow path, impacts the deflection member, reverses direction and passes into a vessel to dislodge particles clinging to inner surfaces thereof.

An apparatus for providing detonative cleaning through a vessel wall has a first conduit extending through the wall. A first valve has an open condition permitting communication through the first conduit and a closed condition. A second conduit has an insertion portion dimensioned to be received within a receiving portion of the first conduit. A second valve has an open condition permitting communication through the second conduit and a closed condition.

The automatic descaling method for electric heating tube in electric water heater features that descaling condition is set in the controller, and when the condition is fulfilled the controller completes the following steps: draining water from the electric water heater to expose the electric heating tube in air; powering the electric heating tube instantaneously to raise the temperature of the scale on the surface of the electric heating tube; opening the water inlet valve to make cold water shower to the scale; shutting down the power source to make the electric water heater return to ready state after the water level raises to certain value.

A method of burning off accumulated contaminants from heat sink media of a regenerative oxidizer having a plurality of segments containing media arranged around a central axis and a rotary valve which includes repeatedly rotating the rotary valve 180 degrees to alternatively direct waste gas through a first plurality of segments, direct the hot gas through a second plurality of segments and purge gas through a third segment to burn off the contaminants, then indexing the rotary valve one segment and repeating the burn-off process of all segments.

Embodiments provide systems and methods for removing debris from a surface. A system can include a first impulse cleaning device and a second impulse cleaning device, each impulse cleaning device generating shock waves directed to a surface to be cleaned, wherein the first impulse cleaning device and the second impulse cleaning device are oriented such that the respective shock waves intersect at or proximate the surface. The system can further include a controller in operable communication with the first impulse cleaning device and the second impulse cleaning device, wherein the controller is configured to selectively cause phased operation of the first impulse cleaning device and the second impulse cleaning device such that the phased operation selectively controls the location of the intersection of the respective shock waves.

The present application provides a pulsed detonation cleaning device. The pulsed detonation cleaning device may include an air inlet, a fuel inlet, an ignition device in communication with the air inlet and the fuel inlet for creating detonation waves, a number of folded flow paths in communication with the ignition device, and a number of flow turning devices positioned about the folded flow paths such that the detonation waves reverse direction a number of times.

A method of burning off accumulated contaminants from heat sink media of a regenerative oxidizer having a plurality of segments containing media arranged around a central axis and a rotary valve which includes repeatedly rotating the rotary valve 180 degrees to alternatively direct waste gas through a first plurality of segments, direct the hot gas through a second plurality of segments and purge gas through a third segment to burn off the contaminants, then indexing the rotary valve one segment and repeating the burn-off process of all segments.

Methods and apparatus are provided for cleaning a surface within a vessel. A fuel / oxidizer charge is provided within a combustion conduit. An initial deflagration commenced in a first portion of the charge produces a final detonation at least in another portion of the charge to expel a shockwave from the conduit which impinges upon the surface. The deflagration-to-detonation transition may be encouraged by mechanical enhancements and / or by making the first charge portion more detonable than the second.

A pulse detonation device can provide one or more shock waves to an operating device. The pulse detonation device includes a pulse detonation chamber providing one or more shock waves, at least one pulse detonation outlet extending into the operating device and in operative association with the pulse detonation chamber, and a rotary union. The rotary union rotatably attaches the pulse detonation chamber to the at least one pulse detonation outlet, wherein the at least one pulse detonation outlet can move with respect to the pulse detonation chamber. The at least one pulse detonation outlet is rotatable within the operating device and can deliver the one or more shock waves to a plurality of locations within the operating device.

Embodiments provide systems 20 and methods 500 for removing debris from a surface. A system 20 can include a first impulse cleaning device 22 and a second impulse cleaning device 23, each impulse cleaning device generating shock waves directed to a surface to be cleaned, wherein the first impulse cleaning device and the second impulse cleaning device are oriented such that the respective shock waves intersect 210 at or proximate the surface. The system can further include a controller 26 in operable communication with the first impulse cleaning device 22 and the second impulse cleaning device 23, wherein the controller 26 is configured to selectively cause phased operation of the first impulse cleaning device 22 and the second impulse cleaning device 23 such that the phased operation selectively controls the location of the intersection 210 of the respective shock waves.

The invention discloses an automatic cleaning coke oven raw coke oven gas waste heat recovery heat exchange tube tar and carbon deposition device. According to the technical characteristics, the innerwall of a heat exchange pipe is of a thread type groove structure, a rotating rod is installed on a center line of the heat exchange pipe, the upper end of the rotating rod extends out of an upper end cover of the heat exchange pipe to be connected with a driving device outside a shell, an ash removing head clamping rod is connected to the lower end of the rotating rod, and ash removing heads areinstalled at the two ends of the ash removing head clamping rod and are in clearance fit with a thread type groove in the inner wall of the heat exchange pipe; and the ash removing head clamping rodand the ash removing heads are driven by the rotating rod to do spiral rotation reciprocating motion along the thread type groove in the inner wall of the heat exchange pipe, the ash removing heads inrotation motion remove tar and deposition carbon attached to the inner wall of the heat exchange pipe, and meanwhile, disturbance is applied to raw coke oven gas. The device solves the problem that heat exchange efficiency reduction caused by tar congealing and carbon deposition on the inner wall of a rising pipe, raw coke oven gas waste heat can be recovered to the largest degree, and it can beguaranteed that the heat exchanger continuously and normally works under the complex working conditions.

A system and associated method for removing accumulated debris from a surface of a vessel. The system includes an impulse cleaning device defining a combustion chamber in which combustible fuel and air are mixed and ignited to produce combustion that is directed at the surface to be cleaned within the vessel, and an eductor assembly surrounding a downstream end of the chamber for inducting surrounding atmosphere into the combustion to widen the area being cleaned.

Pressure probe methods and apparatus are disclosed. An exemplary probe includes a body having an outer surface with a forwardly converging nose. A passageway extends between the first port in the body and the pressure sensor. The support member holds the body in the operative position. A cooling fluid circuit extends at least partially through the support member and the body. Pressure probes can be used in combination with detonation cleaning equipment.

A catalyst regeneration gas loop is operated in a heat exchanger decoking mode. A regeneration gas is diverted away from a burn zone of the catalyst regeneration gas loop and to a heat exchanger, where coke deposits are disposed on a surface of the heat exchanger. The regeneration gas is prevented from flowing to an oxychlorination / calcination zone of the catalyst regeneration gas loop. Within the heat exchanger, the coke deposits are combusted with oxygen of the regeneration gas, thereby removing the coke deposits from the surface of the heat exchanger and producing carbon dioxide. Oxygen is replenished to the regeneration gas. The regeneration gas is recycled to the heat exchanger.

A detonation combustor cleaning device includes at least one combustion chamber having combustion flow path and including a deflection member. An ignition device is operatively connected to the at least one combustion chamber is selectively activated to ignite a combustible fuel within the at least one combustion chamber to produce a shockwave that moves in a first direction along the combustion flow path, impacts the deflection member, reverses direction and passes into a vessel to dislodge particles clinging to inner surfaces thereof.

The present invention concerns a method of weakening and removal of coke or carbonaceous material which deposits as a result of thermal cracking of hydrocarbons on the inner walls of coils, piping, tubing, and in general, hydrocarbon processing equipment.

The present invention provides an improved system and method for cleaning a plurality of semi-permeable heat exchange surfaces using an impulse wave which is transmitted by a distribution network and moved around the heat exchange surfaces by a navigational network.

The present invention discloses a device for automatically cleaning tar and carbon deposits in a heat exchange tube for recovering waste heat from raw gas from a coke oven. The technical key points of the present invention are that the inner wall of the heat exchange tube is a threaded groove structure, a rotating rod is installed on the center line of the heat exchange tube, the upper end of the rotating rod extends out of the upper end cover of the heat exchange tube and is connected to a driving device outside the shell, a cleaning head clamping rod is connected to the lower end of the rotating rod, cleaning heads are installed at both ends of the cleaning head clamping rod, and the cleaning head and the threaded groove on the inner wall of the heat exchange tube are gap-matched; the cleaning head clamping rod and the cleaning head perform spiral rotation and reciprocating motion along the threaded groove on the inner wall of the heat exchanger driven by the rotating rod, and the cleaning head cleans the tar and carbon deposits adhering to the inner wall of the heat exchange tube during the rotational motion, and at the same time, disturbs the raw gas. The present invention solves the problem of reduced heat exchange efficiency caused by tar condensation and carbon deposits on the inner wall of the riser, and can not only recover the waste heat of raw gas to the greatest extent, but also ensure that the heat exchanger works continuously and normally under complex working conditions.

The present invention concerns a method of weakening and removal of coke or carbonaceous material which deposits as a result of thermal cracking of hydrocarbons on the inner walls of coils, piping, tubing, and in general, hydrocarbon processing equipment.

The present application provides a pulse detonation combustor cleaning device. The pulse detonation combustor cleaning device may include a combustion section and one or more combustion tube sections downstream of the combustion section. The combustion tube sections may a divergent shape and a number of divergent obstacles therein.

A thermal postcombustion device includes, in a conventional manner per se, a housing, having an inlet for the exhaust air that is to be purified and an outlet for clean air. A combustion chamber is located inside the housing, and inside this combustion chamber, a heating device generates a temperature at which the pollutants carried by the exhaust air burn. In order to reduce the energy requirement, a heat exchanger is provided over which the exhaust air coming from the inlet is guided to the combustion chamber, and the clean air coming from the combustion chamber is guided to the outlet. In order to also be able to process exhaust air, which is loaded with adherent residues, for example, pitch vapors, a device is provided with which, during a purification mode, at least a portion of the clean air can be optionally fed past a section of the heat exchanger located closer to the combustion chamber and into another section of the heat exchanger located further from the combustion chamber. Deposits, which have formed in the vicinity of the cold end of the heat exchanger, can be removed in this manner, particularly oxidized.

A catalyst regeneration gas loop is operated in a heat exchanger decoking mode. A regeneration gas is diverted away from a burn zone of the catalyst regeneration gas loop and to a heat exchanger, where coke deposits are disposed on a surface of the heat exchanger. The regeneration gas is prevented from flowing to an oxychlorination / calcination zone of the catalyst regeneration gas loop. Within the heat exchanger, the coke deposits are combusted with oxygen of the regeneration gas, thereby removing the coke deposits from the surface of the heat exchanger and producing carbon dioxide. Oxygen is replenished to the regeneration gas. The regeneration gas is recycled to the heat exchanger.

The present invention provides an improved system and method for cleaning a plurality of semi-permeable heat exchange surfaces using an impulse wave which is transmitted by a distribution network and moved around the heat exchange surfaces by a navigational network.

A catalyst regeneration gas loop is operated in a heat exchanger decoking mode. A regeneration gas is diverted away from a burn zone of the catalyst regeneration gas loop and to a heat exchanger, where coke deposits are disposed on a surface of the heat exchanger. The regeneration gas is prevented from flowing to an oxychlorination / calcination zone of the catalyst regeneration gas loop. Within the heat exchanger, the coke deposits are combusted with oxygen of the regeneration gas, thereby removing the coke deposits from the surface of the heat exchanger and producing carbon dioxide. Oxygen is replenished to the regeneration gas. The regeneration gas is recycled to the heat exchanger.