The invention relates to a tubular heat exchanger adopting rotating jet, and particularly to the tubular heat exchanger used for heat exchanging of two fluids in the field of nuclear energy, motive power, rendering, chemical engineering, petrochemical engineering, and the like. The technical problem needs to solve is to provide the tubular heat exchanger adopting the rotating jet which has simple and reasonable structure, effectively lowers the flow resistance, increases the flow area and turbulence effect, reduces shell side dead zone, and is high in heat exchange efficiency. The technical scheme adopted is that the tubular heat exchanger comprises a casing and channel boxes arranged at two ends of the casing, wherein a tube side fluid inlet is formed in a channel box at one end of the area; a tube side fluid outlet is formed in the other end of the casing; a shell side fluid inlet and a shell side fluid outlet are formed in the casing; heat exchange tubes and baffle plates are arranged inside the casing; a plurality of through-holes are formed in each baffle plate respectively; each heat exchange tube vertically penetrates each baffle plate through through-holes; a plurality of spiral fins with the same direction of rotation are arranged on each heat exchange tube. The tubular heat exchanger is mainly used for the heat exchange between fluid media.

Tubular heat exchanger adopting rotating jet

The invention discloses a self-circulation efficient radiator, adopts a closed pipeline, does not need to be externally connected with cooling water for external circulation, facilitates reduction ofcooling cost and is convenient to operate. The radiator is characterized in that TiO2-water nanofluid is adopted as cooling agent, in the TiO2-water nanofluid, the concentration of TiO2 is optimal within the range of 0.2-0.5%, compared with tap water cooling agent adopted by a conventional radiator, a heat exchange coefficient can be increased by about 25%, moreover, a spiral rotating shaft capable of rotating automatically is arranged in a heat dissipation base plate, disturbance of the TiO2-water nanofluid in a pipeline is enhanced through continuous self-rotation of the spiral rotating shaft, the TiO2-water nanofluid is changed into turbulent flow from laminar flow, the heat dissipation capacity is improved to a large extent, and a heat exchange coefficient is increased by 50%.

Self-circulation efficient radiator

The invention relates to a heat exchange pipe for a tubular heat exchanger, which belongs to the field of chemical machinery. The heat exchange pipe comprises a mixer arranged in the heat exchange pipe in a non-fixed manner, wherein the mixer is a screw-type shaftless mixer with a central channel. The invention also relates to the tubular heat exchanger with the heat exchange pipe. The tubular heat exchanger provided by the invention has the advantages of high turbulence degree of fluid in the heat exchange pipe and high heat exchange efficiency.

Tubular heat exchanger and heat exchange pipe thereof

The invention provides a temperature recovery device for a fluid power generation system. The temperature recovery device comprises an aluminum finned tube, a spiral fin arranged in the aluminum finned tube and a heat exchange tube arranged outside the aluminum finned tube. The heat exchange tube and the aluminum finned tube are communicated. The temperature recovery device further comprises an electric heating mantle and sensors. The electric heating mantle partially or wholly wraps the heat exchange tube and is connected with a power storage device, and the sensors are connected with a PLC. The temperature recovery device of the fluid power generation system is arranged on a downstream branch pipeline of a power generating device and can be used for heating low-temperature fluid after power generation so as to achieve temperature recovery, cold fluid and hot fluid are prevented from joining, so that pipelines are prevented from being embrittled, and the service lives of the pipelines are prolonged; moreover, the electric heating mantle is additionally mounted on the temperature recovery device, and it can be ensued that low-temperature fluid flows back to a main pipeline after the temperature automatically recovers to the temperature meeting requirements.

Temperature recovery device for fluid power generation system

A shell-and-tube heat exchanger with higher heat exchange efficiency belongs to the technical field of heat exchange, and is used for improving the heat exchange efficiency of shell-and-tube heat exchangers. The shell-and-tube heat exchanger comprises a casing and a heat exchange pipe which is arranged in the casing, and spiral fins are arranged in the heat exchange pipe in the length direction thereof after the heat exchanger is improved; and the outside diameter of each spiral fin is matched with the inside diameter of the pipe body of the heat exchange pipe. The shell-and-tube heat exchanger is mainly characterized in that: 1, a secondary vortex flow is generated inside fluid when the fluid rotates under the diversion of the spiral fins, so as to break off the balance of a boundary layer, thereby improving the turbulence intensity of the fluid and achieving the purpose of heat transfer enhancement; 2, the spiral fins can be put into or taken off from a pipe conveniently, so that the heat exchanger has low probability of scaling, and can be easily descaled; and 3, the spiral fins and the heat exchange pipes can be produced into various screw pitches and thicknesses, the heat exchanger is suitable for different media, and the applicable pressure and temperature ranges are wide.

Shell type heat exchanger with higher heat exchange efficiency

A shell-and-tube heat exchanger with relatively high heat exchange efficiency belongs to the technical field of heat exchange, and is used for improving the heat exchange efficiency of shell-and-tube heat exchangers. The shell-and-tube heat exchanger comprises a casing and a heat exchange pipe which is arranged in the casing, and is characterized after being improved in that spiral fins are arranged in the heat exchange pipe along the length direction thereof; and the outside diameter of each spiral fin is matched with the inside diameter of the pipe body of the heat exchange pipe. The shell-and-tube heat exchanger is mainly characterized in that: firstly, a secondary vortex flow is generated in fluid when the fluid rotates under the diversion of the spiral fins, so as to break off the balance of a boundary layer, thereby improving the turbulence intensity of the fluid and achieving the purpose of heat transfer enhancement; secondly, the spiral fins can be placed in or taken off from a pipe conveniently, so that the sediment incrustation is reduced, and the sediment incrustation can be easily removed; and thirdly, the spiral fins and the heat exchange pipes can be formed with various screw pitches and thicknesses, the heat exchanger is suitable for different mediums, and the applicable pressure and temperature ranges are wide.

Haixia Wu

Papers

Shell type heat exchanger with higher heat exchange efficiency

Shell-and-tube heat exchanger with relatively high heat exchange efficiency