An exhaust heat recovery boiler includes: a duct casing in which exhaust gas flows; a tubular extending portion extending upward from the duct casing; a heat exchanger tube located in the duct casing; a hammering rod connected to the heat exchanger tube in the duct casing and passing through an inside of the extending portion, the hammering rod including an upper part projecting to an outside of the extending portion; and an annular sleeve attached to the upper part of the hammering rod through a packing. The extending portion includes an upper flat surface which is located at an upper end of the extending portion, realizes a seal between the upper flat surface and a lower surface of the sleeve, and is annular and flat.

An enhancing device for piercing plugs in a steam generator is provided. The enhancing device includes a main body, and a bit, borne by the main body and extending along a longitudinal axis. The bit may be driven into rotation around its longitudinal axis, in order to perform an action for piercing a plug. The device includes a hollow tubular element, extending along the longitudinal axis, while surrounding the bit and coaxially with this bit, the tubular element including an outer surface having a screwing thread, intended to be screwed onto the plug prior to the piercing. The tubular element may be driven into rotation around the longitudinal axis, independently of the rotation of the bit.

Provided herein is a remote inspection apparatus for a heating tube of a steam generator, the apparatus including a fixing unit installed in a flange surface of a hand hole of the steam generator in a fixed manner, and having one or more rail guiders for guiding a guide rail into the steam generator; the guide rail configured to be guided by the rail guider to enter between the heating tube and a divider plate inside the steam generator; a rail driving unit fitted at one end of the guide rail and arranged outside the steam generator, and having a bobbin around which a steel belt is wound; and a probe feeding unit configured to receive a driving force from the rail driving unit through the steel belt to be moved along the guide rail, and having a band shaped probe extending in a length direction and an inspection camera fitted at one end of the probe.

An erosion device and a corresponding method are disclosed for machining a hollow-cylindrical workpiece, wherein the device is elongated and/or formed in the manner of a tube or cylinder and is characterized in that at least two rotationally acting drives (A1, A2), each with a drive shaft (AW1, AW2), and also an erosion electrode (E), interacting with the drives (A1, A2) and formed in the manner of a ring or disc, are provided. The drives (A1, A2) and the electrode (E) are adapted in size and extent to the internal diameter of the workpiece (W) to be machined, so that the device can be introduced into the respective hollow-cylindrical workpiece (W) and can be positioned at the location respectively to be machined or the region to be machined in the workpiece (W), and the erosion electrode (E) can be pivoted or can be rotated by a coupled pivoting or rotating movement of the at least two drives (A1, A2).

A modular heat recovery steam generator (mHRSG) comprises a first boiler module comprising a plurality of pipes having at least one pipe with a flanged end; a first piping deck comprising a plurality of pipes having at least one pipe with a flanged end, wherein the pipe with the flanged end is secured to the pipe with the flanged end of the first boiler module using bolts; a second boiler module comprising a plurality of pipes having at least one pipe with a flanged end; a second piping deck comprising a plurality of pipes having at least one pipe with a flanged end, wherein the pipe with the flanged end is secured to the pipe with the flanged end of the second boiler module using bolts; and a main stack. The first boiler module is operatively coupled to the second boiler module and the second boiler module is operatively coupled to the main stack.

The present disclosure relates to an L-shaped header of a steam generator including a spiral heat transfer tube, and a coupling structure between the L-shaped header and the heat transfer tube, wherein an upper end and a lower end of a heat transfer tube assembly configured with a plurality of heat transfer tubes are vertically formed, and the upper and lower ends of the heat transfer tube assembly are vertically coupled to a bottom side or a top side of the header. Therefore, the heat transfer tubes constituting the same concentric circle may use the heat transfer tubes formed with the same shape, thereby improving the manufacturability of parts and reducing the manufacturing cost.

A manipulator configured to navigate a heat exchanger including a plurality of tubes extending through a tubesheet is disclosed herein, the manipulator including a first end effector, a second end effector, and an articulation assembly. The first end effector is configured to accommodate an instrument configured to service the heat exchanger and includes a first actuator configured to extend a first gripper into a tube of the plurality of tubes. The second end effector includes a second actuator configured to extend a second gripper into a tube of the plurality of tubes. The first and second gripper are configured to secure the manipulator to the tubesheet, and, when the second gripper is securing the manipulator to the tubesheet, the articulation assembly is configured to enable the first end effector to move relative to the second end effector in a plane that is parallel to the tubesheet.

A combustion system with surface-less heat energy exchange for efficient heat energy capture and lower pollutant emission, comprising: a first line feeding an oxygen-rich reactive; a second line feeding a hydrogen fuel; a vessel containing feed-water, a combustion enclosure without a bottom wall submersed into the feed water contained in a vessel, the combustion enclosure configured to receive the feed from each of the first and second line and combust a mixture of the two feeds in a pocket formed between an inner top and side walls of the combustion enclosure and a top surface of the feed-water contained in the vessel; and the combustion within the pocket yielding a high temperature and pressure combustion product and by-product directly into the feed-water of the vessel.

Provided are dryness raiser and method for improving steam dryness of a steam injection boiler. Technical solutions of the dryness raiser and the method are that: a plurality of compressed air circulation holes perpendicular to a front end head are provided in the middle of a flange bolt hole of the front end head in a compressed air inlet passage, and the compressed air inlet passage is connected to a fuel pipe passage by the compressed air circulation holes; and a plurality of compressed air heat dissipation holes are provided in a front end face of the front end head, and are perpendicular to and are connected to the compressed air circulation holes, air heat dissipation nozzles are disposed at tail ends of the compressed air heat dissipation holes, and a plurality of air heat dissipation jet orifices are evenly distributed on circumferences of the air heat dissipation nozzles.

Provided are dryness raiser and method for improving steam dryness of a steam injection boiler. Technical solutions of the dryness raiser and the method are that: a plurality of compressed air circulation holes perpendicular to a front end head are provided in the middle of a flange bolt hole of the front end head in a compressed air inlet passage, and the compressed air inlet passage is connected to a fuel pipe passage by the compressed air circulation holes; and a plurality of compressed air heat dissipation holes are provided in a front end face of the front end head, and are perpendicular to and are connected to the compressed air circulation holes, air heat dissipation nozzles are disposed at tail ends of the compressed air heat dissipation holes, and a plurality of air heat dissipation jet orifices are evenly distributed on circumferences of the air heat dissipation nozzles.