Abstract: A heat exchanger cleaning system is disclosed which is capable of determining the position of a lance within a tube bundle of a heat exchanger core. The system comprises a lance for directing a jet of fluid into spaces between the tubes of the bundle, an arm mounted alongside the lance and movable relative thereto, an abutment mounted to an end of the arm to sense an outer surface of the heat exchanger core, and a transducer for measuring the position of the lance relative to the arm to determine the extent of travel of the tip of the lance beyond the front face of the tube bundle.

Abstract: A downhole chemical injection system that may include at least a first and a second injection port. The first injection port may be fluidically coupled with a chemical injection line and fluidically coupled with a production tubing string to inject the chemical into the production tubing string. Similarly, the second injection port may be fluidically coupled with the chemical injection line and fluidically coupled with the production tubing string to inject the chemical into the production tubing string. The first injection port may include at least a first radially extending injection nozzle, extending injection nozzle extending in a first radial direction relative to a central axis of the production tubing string. Similarly, the second injection port may include at least a second radially extending injection nozzle, extending in a second radial direction relative to the central axis of the production tubing string.

Abstract: A cleaning apparatus comprising a first fluid delivery system configured to eject a first fluid through a first nozzle toward a surface to be cleaned; a second fluid delivery system configures to eject a second fluid through a second nozzle toward the surface to be cleaned, wherein the second fluid comprises a compressed gas at a pressure greater than 345 kilopascals (50 pounds per square inch); a housing configured to partially surround and mount the first and second nozzles; a connector configured to couple the first fluid delivery system to a first fluid source; and a connector configured to couple the second fluid delivery system to a second fluid source.

Abstract: A lancing crawler or head crawls along a no-tube lane (NTL) on a floor defining a reference plane oriented transverse to tubes of a steam generator, and has nozzles that generate lancing fluid jets along at least two different angles in the reference plane spaced apart by at least 45°. A rotational drive rotates the nozzles about an axis of rotation that may be offset from an axis of thrust imposed by the jets from the nozzles. An on-board sighting laser may be mounted with the nozzles, along with an on-board camera. A bladder expands to secure the lancing crawler or head between steam generator tubes adjacent the NTL. Each nozzle may include a taperlock seat. A nozzle tilt drive is configured to tilt the one or more nozzles respective to the reference plane.

Abstract: A controller determines and adjusts system parameters, including cleanliness levels or sootblower operating settings, that are useful for maintaining the cleanliness of a fossil fuel boiler at an efficient level. Some embodiments use a direct controller to determine cleanliness levels and/or sootblower operating settings. Some embodiments use an indirect controller, with a system model, to determine cleanliness levels and/or sootblower settings. The controller may use a model that is, for example, a neural network, or a mass energy balance, or a genetically programmed model. The controller uses input about the actual performance or state of the boiler for adaptation. The controller may operate in conjunction with a sootblower optimization system that controls the actual settings of the sootblowers. The controller may coordinate cleanliness settings for multiple sootblowers and/or across a plurality of heat zones in the boiler.

Abstract: A pulse detonation cleaning system is provided and includes a common tube, which is fluidly coupled to a vessel, a first array, including a plurality of elongate detonation tubes arrayed about a common axis, each of the plurality of the detonation tubes being disposed upstream from and fluidly coupled to an interior of the common tube and a second array, including a plurality of detonators arrayed about the common axis, each of the plurality of the detonators being disposed upstream from and operably coupled to a corresponding one of the plurality of the detonation tubes such that actuation of each of the plurality of the detonators leads to combustion in the corresponding one of the plurality of the detonation tubes.

Abstract: This disclosure may relate generally to systems, devices, and methods for injecting a solid compound in line with a pressurized fluid, typically through a soot blower, to be delivered to targeted areas on the inside of a utility furnace.

Abstract: A cleaning device for a combustion boiler, comprising a high-temperature-resistant cleaning hose for feeding a cleaning medium into the combustion boiler, a hose reel which can be rotated about a first axis of rotation, wherein the cleaning hose can be wound at least partially in said reel, and wherein the hose reel comprises an opening through which the cleaning hose can be guided during winding or unwinding parallel to the first axis of rotation.

Abstract: A temperature sensing sootblower that may be configured as a modification to an existing sootblower or a specially constructed sootblower that, in addition to its normal soot blowing functions, has the capability to measure the flue gas, lance tube, and/or cleaning fluid temperatures. One or more thermocouples or other temperature measuring devices are carried by the soot blower lance tube that is inserted into the boiler. This allows for the temperature of the flue gas, lance tube, and cleaning fluid to be measured as the sootblower lance tube is inserted into and retracted from the boiler. Multiple temperature measuring devices may be located on the sootblower lance to measure the temperature across heat transfer surfaces and at different locations along the lance tube. A data transfer device transmits the temperature measurements from the rotating thermocouple to a non-rotating data acquisition unit for use in boiler cleaning and other operations.

Abstract: This invention relates to a method of rebuilding a sootblowing system of a recovery furnace, said sootblowing system including a plurality of sootblowers (1), and each sootblower (1) including a frame (10), a moveable carriage (14) supported by the frame (10), a motor (2) for moving the carriage (14), a lance tube (11) mounted on the carriage (14) to be insertable into and retractable from the recovery furnace (8), said lance tube (11) having at least one nozzle (12), and a steam feed tube (45, 35, 15) connected to the lance tube (11) for feeding sootblowing steam to be ejected through said at least one nozzle (12) into the recovery furnace, said steam feed tube (45, 35, 15) having a first valve (3) arranged to admit steam through said at least one nozzle (12) only when the carriage with the lance tube (11) is in an activated position, i.e.

Abstract: A sootblower isolation wall box provided for sealing the wall box opening of a large scale boiler to provide sootblower lance tube access to the boiler. The wall box assembly includes a clamping seal assembly having radial sealing segments which are individually actuated. Applying fluid pressure to actuating cylinders causes the seal segments to be clamped against the outer circumference of the sootblower lance tube. During cleaning cycles, the segments are actuated to provide a radial clearance with the lance tube. Preferably, the clamping seal assembly is used in connection with another seal assembly which is relied upon to provide sealing during the cleaning steps. In a preferred embodiment, the additional seal assembly is in the form of a labyrinth-type seal assembly.

Abstract: A sootblowing control system that uses predictive models to bridge the gap between sootblower operation and boiler performance goals. The system uses predictive modeling and heuristics (rules) associated with different zones in a boiler to determine an optimal sequence of sootblower operations and achieve boiler performance targets. The system performs the sootblower optimization while observing any operational constraints placed on the sootblowers.

Abstract: Provided is an apparatus for inspecting a structure including a heating tube, a tube sheet supporting the heating tube, and a flow distribution baffle, which are installed in a steam generator of a nuclear power plant, and more particularly, an apparatus for visually inspecting and removing a foreign object in gaps of a bundle of heating tubes of an upper portion of a tube sheet of a secondary side of a steam generator, in which a detector is inserted into gaps of a bundle of heating tubes of an upper portion of a secondary side of a steam generator so as to inspect sludge or foreign objects, and a foreign object remover removes foreign objects when foreign objects are discovered in the gaps of the heating tubes.

Abstract: A system and method to control of sootblowers in a fossil fueled power plant, in particular to plant applications systems using a graphical programming environment in combination with a set of rules to activate sootblowers. The system can be constrained by time limits and/or rule based time limits. Actual blower activation is typically based on the current status of key control variables in the process which alter the actual activation time within a constraints system. The system does not typically require knowledge or models of specific cleanliness relationships. The result is a system without sequences or queues that readily adapts to changing system conditions.

Abstract: A controller determines and adjusts system parameters, including cleanliness levels or sootblower operating settings, that are useful for maintaining the cleanliness of a fossil fuel boiler at an efficient level. Some embodiments use a direct controller to determine cleanliness levels and/or sootblower operating settings. Some embodiments use an indirect controller, with a system model, to determine cleanliness levels and/or sootblower settings. The controller may use a model that is, for example, a neural network, or a mass energy balance, or a genetically programmed model. The controller uses input about the actual performance or state of the boiler for adaptation. The controller may operate in conjunction with a sootblower optimization system that controls the actual settings of the sootblowers. The controller may coordinate cleanliness settings for multiple sootblowers and/or across a plurality of heat zones in the boiler.

Abstract: The arrangement is for positioning equipment in association with an opening in a boiler wall and has a rotation mechanism that rotates the equipment around a virtual rotation axis that lies within the outer wall of the boiler. During the use of a liquor spreader for the introduction of combustible material, the opening of the liquor spreader is arranged in the virtual center of rotation so that the point at which the combustible material is introduced is retained independently of the angle of rotation. The liquor spreader is united either with a glide device or the guide in the rotation mechanism.

Abstract: An apparatus for preventing lime scale buildup in a water heater tank includes a curve-biased tube, the tube including an opening disposed at an end, a length of at least seventy-five percent of the circumference of an interior bottom of the water heater tank, and a plurality of holes disposed along the length that face radially inward when the tube is arranged in a substantially annular configuration in accordance with its curve-biased position.

Abstract: An apparatus that visually inspects a state of sludge and foreign substances found between steam generator bundles positioned at an upper portion of a tube sheet of a steam generator of a nuclear power plant using a visual inspector mounted in a robot moving on an inner wall surface of the steam generator for removing the foreign substances.

Abstract: A temperature sensing sootblower that may be configured as a modification to an existing sootblower or a specially constructed sootblower that, in addition to its normal soot blowing functions, has the capability to measure the flue gas, lance tube, and/or cleaning fluid temperatures. One or more thermocouples or other temperature measuring devices are carried by the sootblower lance tube that is inserted into the boiler. This allows for the temperature of the flue gas, lance tube, and cleaning fluid to be measured as the sootblower lance tube is inserted into and retracted from the boiler. Multiple temperature measuring devices may be located on the sootblower lance to measure the temperature across heat transfer surfaces and at different locations along the lance tube. A data transfer device transmits the temperature measurements from the rotating thermocouple to a non-rotating data acquisition unit for use in boiler cleaning and other operations.

Abstract: A cleaning system and method for cleaning heat transfer surfaces in a boiler using a temperature measuring system for measuring and monitoring wall temperature of an annular wall of the tube of a lance of one or more sootblowers. Controlling a flow of steam or other fluid through the tube during the cooling portions of the strokes based on wall temperature measurements from the temperature measuring system. Infrared or thermocouple temperature measuring systems may be used. The steam or other fluid may be flowed at a default flowrate that may be substantially zero until the temperature measuring system indicates the wall temperature of the annular wall begins to exceed a predetermined temperature limit which may be the softening point of the annular wall. Then the steam or other fluid is flowed at a rate greater than the default flowrate.

Abstract: An intelligent sootblower that may be configured as a modification to an existing sootblower or a specially constructed sootblower that, in addition to its normal soot blowing functions, has the capability to measure the flue gas, lance tube, and/or cleaning fluid temperatures. One or more thermocouples or other temperature measuring devices are carried by the sootblower lance tube that is inserted into the boiler. This allows for the temperature of the flue gas, lance tube, and cleaning fluid to be measured as the sootblower lance tube is inserted into and retracted from the boiler. Multiple temperature measuring devices may be located on the sootblower lance to measure the temperature across heat transfer surfaces and at different locations along the lance tube. A data transfer device transmits the temperature measurements from the rotating thermocouple to a non-rotating data acquisition unit for use in boiler cleaning and other operations.

Abstract: A sootblowing control system that uses predictive models to bridge the gap between sootblower operation and boiler performance goals. The system uses predictive modeling and heuristics (rules) associated with different zones in a boiler to determine an optimal sequence of sootblower operations and achieve boiler performance targets. The system performs the sootblower optimization while observing any operational constraints placed on the sootblowers.

Abstract: An intelligent sootblower that may be configured as a modification to an existing sootblower or a specially constructed sootblower that, in addition to its normal soot blowing functions, has the capability to measure the flue gas, lance tube, and/or cleaning fluid temperatures. One or more thermocouples or other temperature measuring devices are carried by the sootblower lance tube that is inserted into the boiler. This allows for the temperature of the flue gas, lance tube, and cleaning fluid to be measured as the sootblower lance tube is inserted into and retracted from the boiler. Multiple temperature measuring devices may be located on the sootblower lance to measure the temperature across heat transfer surfaces and at different locations along the lance tube. A data transfer device transmits the temperature measurements from the rotating thermocouple to a non-rotating data acquisition unit for use in boiler cleaning and other operations.

Abstract: This disclosure may relate generally to systems, devices, and methods for a injecting a solid compound in line with a pressurized fluid, through a sootblower burner or other utility furnace hardware, such that the compound can be delivered to targeted areas on the inside of a utility furnace.

Abstract: A temperature sensing sootblower that may be configured as a modification to an existing sootblower or a specially constructed sootblower that, in addition to its normal soot blowing functions, has the capability to measure the flue gas, lance tube, and/or cleaning fluid temperatures. One or more thermocouples or other temperature measuring devices are carried by the sootblower lance tube that is inserted into the boiler. This allows for the temperature of the flue gas, lance tube, and cleaning fluid to be measured as the sootblower lance tube is inserted into and retracted from the boiler. Multiple temperature measuring devices may be located on the sootblower lance to measure the temperature across heat transfer surfaces and at different locations along the lance tube. A data transfer device transmits the temperature measurements from the rotating thermocouple to a non-rotating data acquisition unit for use in boiler cleaning and other operations.

Abstract: A sootblower is provided having a multidirectional cleaning range for directing a cleaning medium against heated surfaces in a heat exchanger. The sootblower includes a rotatable lance tube that is selectively advanced and withdrawn along a longitudinal axis from an interior volume of the heat exchanger. The lance tube includes an articulating wrist coupled to a nozzle for projecting the cleaning medium in multi-directions onto the heated surfaces when the lance tube is advanced into the heat exchanger. The nozzle is pivotable about the longitudinal axis and about a second axis transverse to the longitudinal axis.

Abstract: Certain techniques involve the use of a device including a fluid distributor which has at least one flow duct with an inlet opening and an outlet opening. The inlet opening can be connected to a supply line for a fluid. Means for moving the fluid distributor are provided. Additionally, means are provided for recording an environmental parameter through the outlet opening.

Abstract: The present invention relates to a method and a system for optimizing steam or other cleaning medium used during soot removal in a boiler in which energy is generated by fuel combustion, with accompanying production of soot, and heat energy is transferred from the product gases to a heated medium via heat exchanger tubes on which the soot collects, by; monitoring the mass flow rate of the cleaning medium, determining which set of sootblowers are in operation, calculating appropriate high flow alarm set point and low flow set point for each particular sootblower, notifying an operator whether the sootblowers are operating within the setpoints so that appropriate action can be taken to the set of sootblowers. In addition, the invention performs leak detection by monitoring for a system bottled up situation and notifies the operator when a steam leak is detected.

Abstract: A miniature sludge lance for a steam generator in a pressurized water nuclear reactor is provided. The sludge lance is structured to enter the steam generator via an inspection opening and has a body sufficiently thin to fit between adjacent tubes. The sludge lance rail has at least two types of nozzle assemblies that may be attached thereto. One nozzle assembly rotates and another nozzle assembly translates in a vertical direction. A drive assembly, a mounting assembly, an oscillation assembly, and flow straighteners are also provided.

Abstract: A miniature sludge lance for a steam generator in a pressurized water nuclear reactor is provided. The sludge lance is structured to enter the steam generator via an inspection opening and has a body sufficiently thin to fit between adjacent tubes. The sludge lance rail has at least two types of nozzle assemblies that may be attached thereto. One nozzle assembly rotates and another nozzle assembly translates in a vertical direction. A drive assembly, a mounting assembly, an oscillation assembly, and flow straighteners are also provided.

Abstract: A miniature sludge lance for a steam generator in a pressurized water nuclear reactor is provided. The sludge lance is structured to enter the steam generator via an inspection opening and has a body sufficiently thin to fit between adjacent tubes. The sludge lance rail has at least two types of nozzle assemblies that may be attached thereto. One nozzle assembly rotates and another nozzle assembly translates in a vertical direction. A drive assembly, a mounting assembly, an oscillation assembly, and flow straighteners are also provided.

Abstract: A miniature sludge lance for a steam generator in a pressurized water nuclear reactor is provided. The sludge lance is structured to enter the steam generator via an inspection opening and has a body sufficiently thin to fit between adjacent tubes. The sludge lance rail has at least two types of nozzle assemblies that may be attached thereto. One nozzle assembly rotates and another nozzle assembly translates in a vertical direction. A drive assembly, a mounting assembly, an oscillation assembly, and flow straighteners are also provided.

Abstract: This disclosure may relate generally to systems, devices, and methods for a injecting a solid compound in line with a pressurized fluid, typically through a sootblower, to be delivered to targeted areas on the inside of a utility furnace.

Abstract: A miniature sludge lance for a steam generator in a pressurized water nuclear reactor is provided. The sludge lance is structured to enter the steam generator via an inspection opening and has a body sufficiently thin to fit between adjacent tubes. The sludge lance rail has at least two types of nozzle assemblies that may be attached thereto. One nozzle assembly rotates and another nozzle assembly translates in a vertical direction. A drive assembly, a mounting assembly, an oscillation assembly, and flow straighteners are also provided.

Abstract: Provided is a lancing device in which two guide rails and washing robots are installed in both directions of a hand hole, and each washing robot removes precipitates from the center of a steam generator, and therefore precipitates do not flow backwards, thereby completely removing precipitates.

Abstract: A sootblower isolation wall box provided for sealing the wall box opening of a large scale boiler to provide sootblower lance tube access to the boiler. The wall box assembly includes a clamping seal assembly having radial sealing segments which are individually actuated. Applying fluid pressure to actuating cylinders causes the seal segments to be clamped against the outer circumference of the sootblower lance tube. During cleaning cycles, the segments are actuated to provide a radial clearance with the lance tube. Preferably, the clamping seal assembly is used in connection with another seal assembly which is relied upon to provide sealing during the cleaning steps. In a preferred embodiment, the additional seal assembly is in the form of a labyrinth-type seal assembly.

Abstract: A boiler of a combustion plant has at least one heat exchanging device which can be traversed by a medium from an inlet to an outlet and is held in the interior of the boiler by means of at least one suspension device, wherein means for determining the temperature of the medium are provided at least at the inlet or at the outlet, and the at least one suspension device has means for determining the weight of the at least one heat exchanging device. Also proposed are a cleaning control device, a cleaning method and a method for operating a combustion plant which permit a considerable reduction in the cleaning expenditure, so that maintenance costs can be kept low.

Abstract: A sootblower frame particularly adapted for long retracting-type sootblowers for cleaning of internal surfaces of large scale combustion devices. The frame, preferably formed from sheet metal stock, incorporates integrally formed surfaces and configuration features which provide for guiding and movement of the sootblower carriage assembly. The side panels of the frame further provide the surface for the mounting of the drive rack by which the carriage is advanced and retracted along the frame.

Abstract: A device (1) for cleaning a boiler (13) of a combustion system (16), comprising a fluid distributor (2) which has at least one flow passage (3) with an inlet opening (4) and an outlet opening (5), wherein the inlet opening (4) can be connected to a feed line (6) for a fluid, wherein the flow passage (3) is constructed with at least one connection changer (7) by which disconnecting of the at least one flow passage (3) from the feed line (7) and connecting of the at least one flow passage (3) to at least one further connecting unit (8) can be carried out. Furthermore, a method for operating such a device in connection with a boiler of a combustion system is proposed.

Abstract: A sootblower is provided having a multidirectional cleaning range for directing a cleaning medium against heated surfaces in a heat exchanger. The sootblower includes a rotatable lance tube that is selectively advanced and withdrawn along a longitudinal axis from an interior volume of the heat exchanger. The lance tube includes an articulating wrist coupled to a nozzle for projecting the cleaning medium in multi-directions onto the heated surfaces when the lance tube is advanced into the heat exchanger. The nozzle is pivotable about the longitudinal axis and about a second axis transverse to the longitudinal axis.

Abstract: Examples described herein include methods and systems for operating a sootblower for removing deposits from heat transfer surfaces of a boiler. A temperature change of a boiler fluid at one location on its flow path may be calculated during no more than substantially one stroke of the sootblower. The sootblower may then be operating using a frequency of use or a steam output selected based, at least in part, on the calculated temperature change. The temperature change of the boiler fluid during all or a portion of the sootblower stroke may be used as a relative measure of a deposition rate in the vicinity of the sootblower.

Abstract: The present invention provides a method of removing sludge deposits from steam generator/boiler tube support plates (TSP) using a combination of thermal stress and intermittent pressure pulses wherein the steam generator/boiler is drained to a water level just above a TSP identified as having excessive sludge deposits and/or particularly nonporous sludge known as collars and both thermal stress and high impact pressure pulses are used to dislodge the sludge and/or the collars with the process being repeated for all such TSP and the residue then flushed out by draining or using water lancing methods.

Abstract: A sootblower having a nozzle that includes one or more deep reaching jets aligned with its respective platen bank to clean slag deposits inset from the leading edge of the platen bank. The nozzle also includes one or more edge cleaning jets substantially angled with respect to the platen bank for cleaning the leading edges of the platen bank. For most applications, the major axis of the sootblower is perpendicular to the major axis of its respective platen bank, resulting in a sootblower with a nozzle having angled and perpendicular jets, referred to as angled-perpendicular nozzles. The jet sizes are selected to balance the opposing components of force perpendicular to the sootblower to avoid the imposition of torque on the lance.

Abstract: This invention relates to a method of rebuilding a sootblowing system of a recovery furnace, said sootblowing system including a plurality of sootblowers (1), and each sootblower (1) including a frame (10), a moveable carriage (14) supported by the frame (10), a motor (2) for moving the carriage (14), a lance tube (11) mounted on the carriage (14) to be insertable into and retractable from the recovery furnace (8), said lance tube (11) having at least one nozzle (12), and a steam feed tube (45, 35, 15) connected to the lance tube (11) for feeding sootblowing steam to be ejected through said at least one nozzle (12) into the recovery furnace, said steam feed tube (45, 35, 15) having a first valve (3) arranged to admit steam through said at least one nozzle (12) only when the carriage with the lance tube (11) is in an activated position, i.e.

Abstract: A cleaning system and method for cleaning heat transfer surfaces in a boiler using a temperature measuring system for measuring and monitoring wall temperature of an annular wall of the tube of a lance of one or more sootblowers. Controlling a flow of steam or other fluid through the tube during the cooling portions of the strokes based on wall temperature measurements from the temperature measuring system. Infrared or thermocouple temperature measuring systems may be used. The steam or other fluid may be flowed at a default flowrate that may be substantially zero until the temperature measuring system indicates the wall temperature of the annular wall begins to exceed a predetermined temperature limit which may be the softening point of the annular wall. Then the steam or other fluid is flowed at a rate greater than the default flowrate.

Abstract: Certain techniques involve the use of a device including a fluid distributor which has at least one flow duct with an inlet opening and an outlet opening. The inlet opening can be connected to a supply line for a fluid. Means for moving the fluid distributor are provided. Additionally, means are provided for recording an environmental parameter through the outlet opening.

Abstract: A controller determines and adjusts system parameters, including cleanliness levels or sootblower operating settings, that are useful for maintaining the cleanliness of a fossil fuel boiler at an efficient level. Some embodiments use a direct controller to determine cleanliness levels and/or sootblower operating settings. Some embodiments use an indirect controller, with a system model, to determine cleanliness levels and/or sootblower settings. The controller may use a model that is, for example, a neural network, or a mass energy balance, or a genetically programmed model. The controller uses input about the actual performance or state of the boiler for adaptation. The controller may operate in conjunction with a sootblower optimization system that controls the actual settings of the sootblowers. The controller may coordinate cleanliness settings for multiple sootblowers and/or across a plurality of heat zones in the boiler.

Abstract: A device and method to perform on-line automatic flushing and cleaning for a steam turbine generator condenser, related with technology for flushing and cleaning of equipment during steam turbine generator operation, the apparatus includes: a polar coordinate traveling mechanical system, including one computer program polar coordinate control unit, which will control the servo motors to position the high-pressure water jet on the opening for Copper tube (or Titanium tube); the benefit for the invention is that, the polar coordinate traveling mechanical system move the high-pressure water jet to flush and clean each Copper tube (or Titanium tube) on condenser tube plate, to realize high-pressure water cleaning for each pipe during operation of generator, therefore, the heat exchanging efficient can be increased, further to reduce the consumption of coal for steam turbine generator, and archive the aim to saving coal, and reduction in generating cost.

Abstract: An upper bundle cleaning system of steam generator is disclosed which can clean heat transfer tubes and a plurality of tube support plates that support the heat transfer tubes and have slots, using a cleaning device transferred along a guide rail installed to an upper hand hole of the steam generator. The cleaning device is installed to an ascending/descending mechanism which is vertically transferable. The cleaning device includes a frame, at least one or more guide component, a spray component, and a hinge unit, such that the cleaning device is ascended and descended by the ascending/descending mechanism to clean the heat transfer tubes and the tube support plates.

Abstract: An injection lance for injecting a fluid over a predefined target area within a system includes a support block with an inlet side and an outlet side. A plurality of channels are disposed non-parallel with respect to each other within the support block and extend between the inlet and outlet sides of the support block so as to receive fluid at the inlet side and deliver fluid through the support block for injection from the outlet side of the support block over the target area. At least two channels extend from the inlet side toward the outlet side in a direction away from a central axis of the support block, where the central axis intersects the outlet side. The target area includes a plurality of consecutively aligned sectors, and the channels are oriented within the support block so that a central axis of a fluid stream injected from each channel over the target area is centered between longitudinal boundaries defined by a respective sector.