A sector marker for placement over a tubesheet and defining an opening for performing maintenance on an open tube located below the sector marker, the sector marker positioned over the tubesheet by at least two pins extending below the sector marker and respectively received in tube openings below the sector marker. A device and a method for easily and accurately marking and identifying the location of the tubes in a reactor vessel and for keeping track, in real-time, of the tasks performed on the tubes.

A method for cleaning a coke deposit from an internal surface of a process equipment, comprising removing at least a portion of the coke deposit from the internal surface using a flexible pig comprising a plurality of bristles, without damaging a metal protective layer of the internal surface of the process equipment. A flexible pig for cleaning a coke deposit from an internal surface of a process equipment without damaging a metal protective layer of the internal surface, comprising a flexible body formed of a polymeric material, and a plurality of bristles partially encapsulated by the polymeric material of the flexible body.

A method for cleaning a coke deposit from an internal surface of a process equipment, comprising removing at least a portion of the coke deposit from the internal surface using a flexible pig comprising a plurality of bristles, without damaging a metal protective layer of the internal surface of the process equipment. A flexible pig for cleaning a coke deposit from an internal surface of a process equipment without damaging a metal protective layer of the internal surface, comprising a flexible body formed of a polymeric material, and a plurality of bristles partially encapsulated by the polymeric material of the flexible body.

A heat exchanger cleaning system comprises: a target rotating body which rotates around a rotation axis; a first inlet through which first gas on the target rotating body is introduced; and a first soot blower located in the inner space of the first inlet and including a first injection port through which a first substance is injected and a second injection port through which a second substance is injected, wherein a first distance of the first injection port from the rotation axis is substantially the same as a second distance of the second injection port from the rotation axis. A heat exchanger cleaning method using the heat exchanger cleaning system comprises: a step for positioning the first soot blower; a step for spraying the first substance and the second substance at the same time; and a step for removing foreign substances.

A heat exchanger cleaning system comprises: a target rotating body which rotates around a rotation axis; a first inlet through which first gas on the target rotating body is introduced; and a first soot blower located in the inner space of the first inlet and including a first injection port through which a first substance is injected and a second injection port through which a second substance is injected, wherein a first distance of the first injection port from the rotation axis is substantially the same as a second distance of the second injection port from the rotation axis. A heat exchanger cleaning method using the heat exchanger cleaning system comprises: a step for positioning the first soot blower; a step for spraying the first substance and the second substance at the same time; and a step for removing foreign substances.

A horizontal collecting-while-sending-ball water separator, has an outer barrel, the side wall of the outer barrel has a ball collection opening, a water outlet, a ball sending opening and a water inlet; a water inlet and outlet control valve connects to the water outlet and the water inlet, the control valve comprises an inner barrel, the inner barrel is divided into a first conduit and a second conduit, the side wall of the first conduit has two first openings, the side wall of the second conduit has two second openings; the separator can collect and send balls synchronously.

A horizontal collecting-while-sending-ball water separator, has an outer barrel, the side wall of the outer barrel has a ball collection opening, a water outlet, a ball sending opening and a water inlet; a water inlet and outlet control valve connects to the water outlet and the water inlet, the control valve comprises an inner barrel, the inner barrel is divided into a first conduit and a second conduit, the side wall of the first conduit has two first openings, the side wall of the second conduit has two second openings; the separator can collect and send balls synchronously.

An end cover structure and a water chiller. The end cover structure includes: an end cover body; a water inlet pipe, provided on the end cover body; a water outlet pipe, provided on the end cover body, the water outlet pipe and the water inlet pipe being provided independent of each other; a bypass pipeline in which two cavities are formed, one of the two cavities being communicated with the water inlet pipe, and the other being communicated with the water outlet pipe; and an adjusting member, movably provided in the bypass pipeline. The adjusting member is movable to adjust the communication between the two cavities.

The present invention relates to an apparatus for circulating balls. An embodiment of the present invention includes: a circulation path for circulating balls and fluid, the circulation path comprising a cooling water tube of a heat exchange unit; a pump arranged in the circulation path for pumping the balls and fluid; and a counter for counting the time and the number of the balls in relation to the circulation of the balls.

The present invention relates to an apparatus for circulating balls. An embodiment of the present invention includes: a circulation path for circulating balls and fluid, the circulation path comprising a cooling water tube of a heat exchange unit; a pump arranged in the circulation path for pumping the balls and fluid; and a counter for counting the time and the number of the balls in relation to the circulation of the balls.