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.

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.

A heatsink comprising a heat exchange device having a plurality of heat exchange elements each having a surface boundary with respect to a heat transfer fluid, having successive elements or regions having varying size scales. According to one embodiment, an accumulation of dust or particles on a surface of the heatsink is reduced by a removal mechanism. The mechanism can be thermal pyrolysis, vibration, blowing, etc. In the case of vibration, adverse effects on the system to be cooled may be minimized by an active or passive vibration suppression system.

A heatsink comprising a heat exchange device having a plurality of heat exchange elements each having a surface boundary with respect to a heat transfer fluid, having successive elements or regions having varying size scales. According to one embodiment, an accumulation of dust or particles on a surface of the heatsink is reduced by a removal mechanism. The mechanism can be thermal pyrolysis, vibration, blowing, etc. In the case of vibration, adverse effects on the system to be cooled may be minimized by an active or passive vibration suppression system.

A heat exchanger tube block is stacked on another heat exchanger tube block in an upper-lower direction and connected to the another heat exchanger tube block. The heat exchanger tube block includes: a duct casing wherein exhaust gas containing dust flows in the upper-lower direction; a heat exchanger tube in the duct casing extends horizontally; an inlet header connects to the heat exchanger tube inlet; an outlet header connected to an outlet of the heat exchanger tube; and a vibration transmitting member transmitting vibration, applied to an upper end part of the vibration transmitting member, to the heat exchanger tube to make the dust accumulating on the heat exchanger tube fall. A lower end of the duct casing is formed horizontally. The inlet header is located higher than the lower end of the duct casing. The outlet header is located higher than the lower end of the duct casing.

A heat exchanger tube block is stacked on another heat exchanger tube block in an upper-lower direction and connected to the another heat exchanger tube block. The heat exchanger tube block includes: a duct casing wherein exhaust gas containing dust flows in the upper-lower direction; a heat exchanger tube in the duct casing extends horizontally; an inlet header connects to the heat exchanger tube inlet; an outlet header connected to an outlet of the heat exchanger tube; and a vibration transmitting member transmitting vibration, applied to an upper end part of the vibration transmitting member, to the heat exchanger tube to make the dust accumulating on the heat exchanger tube fall. A lower end of the duct casing is formed horizontally. The inlet header is located higher than the lower end of the duct casing. The outlet header is located higher than the lower end of the duct casing.

A system and method for monitoring heat exchanger tube health without requiring the heat exchanger system to be shut down and disassembled and without operator intervention. At least one wireless sensor ball (WSB) assembly is positioned in the heat exchanger system. The heat exchanger system includes an ultrasonic acoustic receiver array mounted therewithin. WSB assembly information is gathered regarding status, operating condition, health, efficiency of the piping system, and/or, piping system health trends.

A method for identifying and eliminating ammonium salt deposition characteristics in a pipe of a hydrogenation air cooler is provided. A multiphase flow medium enters an inlet pipe box of a hydrogenation air cooler; an initial service state is calibrated, an initial temperature calibration line and an equivalent temperature reference line are drawn to set a benchmark; cross sections and temperature transmitters are arranged on a pipe bundle of the air cooler at equal intervals in the axial direction; a temperature signal value is monitored and transmitted to a single-chip microcomputer for data analysis; an infrared thermal imager performs photographing, transmits data to determine if an ammonium salt deposition risk is present under this working condition; a monitored temperature value is calculated, an ammonium salt deposition risk identification model is established, and an ammonium salt deposition risk on a temperature information monitoring section is then determined.

A method for identifying and eliminating ammonium salt deposition characteristics in a pipe of a hydrogenation air cooler is provided. A multiphase flow medium enters an inlet pipe box of a hydrogenation air cooler; an initial service state is calibrated, an initial temperature calibration line and an equivalent temperature reference line are drawn to set a benchmark; cross sections and temperature transmitters are arranged on a pipe bundle of the air cooler at equal intervals in the axial direction; a temperature signal value is monitored and transmitted to a single-chip microcomputer for data analysis; an infrared thermal imager performs photographing, transmits data to determine if an ammonium salt deposition risk is present under this working condition; a monitored temperature value is calculated, an ammonium salt deposition risk identification model is established, and an ammonium salt deposition risk on a temperature information monitoring section is then determined.