摘要:
A metal blade on a rotary cleaning tool for cleaning heat exchanger tubes, is insulated from companion cutting blades circularly spaced on the tube. A direct current voltage of low level is applied through the flexible cable and central shaft of the cleaning tool and is a part of a circuit including a current amplifier input and the heat exchanger tube being cleaned. As the tool removes foreign matter from the tube, the resistance to current flow from the insulated blade to the tube decreases, and the current level increases. The current signal, which is thereby an input signal analog of the thermo conductance from the sensor blade to the tube, is converted to a voltage analog. The voltage analog signal is then rectified to smooth out the effect of sensor bounce and rotational effects of mechanical drive system for the tool. The output signal from the rectifier is monitored by a zero to one volt DC meter movement and displayed on the meter face, which may include a color coding thereon from red to white or to green, whereby a red or low scale reading is indicative of a dirty or low thermo conductance tube, whereas a reading in the green at the high end of the scale is indicative of a clean or high thermo conductive tube. The visual observation provides the servicing mechanic a measurement base by which he can determine the required cleaning tool insertion rate and cleaning time cycle, and optimize the efficiency of the service provided.
摘要:
To enable long-term continuous operation by preventing blocking of a reaction pipe line disposed in a multi-pipe or double-walled-pipe heat exchanger, provided is a device for producing gas hydrate including a multi-pipe or double-walled-pipe device 1 for generating gas hydrate having a reaction pipe line 2 for flowing raw material water w and raw material gas g and a coolant circulation region 3 for circulating a coolant c and thereby cooling the reaction pipe line 2, wherein a coil spring 4 extending in the longitudinal direction of the reaction pipe line 2 is provided in the reaction pipe line 2.
摘要:
An apparatus for the removal of residues from the inner wall of a tube carrying hot gases and/or vapors includes a passage extending into a first end of the tube in an axial direction; an axially extending shaft supported within the passage in an axially displaceable manner so that one end of the shaft is within the tube; a discharge opening in the tube through which the residues may be removed; a helically wound metal scraper connected to the one end of the shaft; and a device for driving the shaft such that the scraper is rotated in a manner of a corkscrew into the tube.
摘要:
A metal blade on a rotary cleaning tool for cleaning heat exchanger tubes, is insulated from companion cutting blades circularly spaced on the tube. A direct current voltage of low level is applied through the flexible cable and central shaft of the cleaning tool and is a part of a circuit including a current amplifier input and the heat exchanger tube being cleaned. As the tool removes foreign matter from the tube, the resistance to current flow from the insulated blade to the tube decreases, and the current level increases. The current signal, which is thereby an input signal analog of the thermo conductance from the sensor blade to the tube, is converted to a voltage analog. The voltage analog signal is then rectified to smooth out the effect of sensor bounce and rotational effects of mechanical drive system for the tool. The output signal from the rectifier is monitored by a zero to one volt DC meter movement and displayed on the meter face, which may include a color coding thereon from red to white or to green, whereby a red or low scale reading is indicative of a dirty or low thermo conductance tube, whereas a reading in the green at the high end of the scale is indicative of a clean or high thermo conductive tube. The visual observation provides the servicing mechanic a measurement base by which he can determine the required cleaning tool insertion rate and cleaning time cycle, and optimize the efficiency of the service provided.
摘要:
Process for steam cracking of thermally unstable feedstock such as plastic pyrolysis oil, or olefin rich hydrocarbon cuts such as cracked gasoline, coker naphtha or diesel. The invention is also about a heat exchanger suitable for that process.
摘要:
The invention relates to a device for maintaining in position one end of an element driven in rotation by a fluid circulating in a tube (12), the other end of said element being free, said device being of the type which comprises a part forming a bearing (1) and adapted to be rigidly attached to one end of the tube, and an element (4), mounted for rotation relative to the part forming a bearing (1) and adapted to be attached to one end of the movable element (13). In accordance with the invention, the part forming a bearing (1) is a one-piece part made of a rigid material that is capable of being elastically deformed, said one-piece part comprising at least two flanges (2) spaced apart by such a distance that they can be force-fitted into an open end of said tube (12) to bear elastically on its inner wall so as to rigidly join the part forming a bearing (1) to the tube.
摘要:
A spirally configured member, rotatably positioned within an elongated tube, the spiral member adapted to continuously clean the tube's interior wall when such member is caused to rotate. The spiral has one end rotatably anchored by a plug fixed to one upstream end of the tube and a swivel linking the plug and the spiral member.
摘要:
A coupling for connecting a rotating tube cleaning shaft to a tube cleaning machine where high pressure fluid is pumped through the coupling, where the coupling is sealed to contain the high pressure fluid, and where a machine driven rotary flexible shaft passes through the coupling.
摘要:
The invention concerns a positioning device for a tube cleaning element rotatably driven by fluid passing through the tube. This is particularly useful for heat exchanger tubes. This device includes an open-frame support member (1) having one or more parts (8a, 8b) (preferably of generally cylindrical shape) for mounting on the outside on one end of said tube, and further includes a spindle (2) mounted for rotation with respect to said frame (1) along the axis of the end of said tube and adapted to be fastened to said rotatable element.
摘要:
The decontamination apparatus comprises a rotatable hone capable of being inserted into a heat exchange tube of a steam generator for removing contamination from the inside of the heat exchange tubes. The apparatus also comprises means for advancing and retracting the hone and means for removing contamination from the apparatus as the apparatus is withdrawn from the steam generator.