The invention discloses a tube shell type heat exchanger with triangular cross section contracting and expanding baffle plates. The tube shell type heat exchanger is mainly applied to the fields of petroleum, chemical engineering, metallurgy, power, ships and the like. The invention provides a brand-new structural form of the baffle plate heat exchanger. Through contracting and expanding fluid, transverse scouring is transformed into inclined scouring, so that pressure drop, loss of pump power and vibration of tube bundles can be reduced; and through reasonable arrangement, a dead area is eliminated, the problems of heat exchange and scaling are solved, the heat exchange efficiency of the tube shell type heat exchanger is improved, and optimization of a comprehensive effect is realized.

Tube shell type heat exchanger with triangular cross section contracting and expanding baffle plates

The invention provides a steam heat exchanger capable of evenly distributing flow. The steam heat exchanger comprises an upper collecting box, a lower collecting box and heat exchange pipes arranged between the upper collecting box and the lower collecting box. A heat source in the heat exchange pipe is steam. The heat exchanger comprises an inlet pipe. The inlet pipe is arranged on the lower collecting box. Partition devices are arranged in the heat exchange pipes. Each partition device is of a sheet structure and is composed of square through holes and regular octagonal through holes. The side lengths of the square through holes in the different heat exchange pipes are different, and the longer the distances away from the inlet pipe are, the larger the side lengths of the square throughholes are. By changing the side lengths of the square through holes along with the distances away from the inlet pipe, fluid is made to flow into the heat exchange pipes which are small in flowing resistance and long in distances away from the inlet pipe, and therefore the fluid can be evenly distributed in the heat exchange pipes, the heat exchange efficiency is improved, and the service life isprolonged.

Steam heat exchanger capable of evenly distributing flow

The invention provides a shell-and-tube heat exchanger comprising a shell. Sealing heads are arranged at the two ends of the shell, pipe plates are arranged at the connection positions of the sealingheads and the shell, a heat exchange pipe is connected with the pipe plates at the two ends, a gas phase in gas-liquid two-phase flow is insoluble or poorly-soluble gas, in other words, the gas cannotbe dissolved in liquid in the heat exchange process, a separating device is arranged in the heat exchange pipe and is of a sheet-like structure, and the sheet-like structure is arranged on the crosssection of the heat exchange pipe; and the separating device is composed of square through holes and regular octagonal through holes, the side length of the square through holes is equal to the side length of the regular octagonal through holes, the four sides of each square through hole are the sides of four different regular octagonal through holes, and the four mutually-spaced sides of each regular octagonal through hole are the sides of four different square through holes. According to the heat exchanger with the separating device of the new structure, when the gas-liquid two-phase flow exists in the pipe, compared with the background art, heat transfer is further enhanced, vibration of the pipe is weakened, and the noise level is reduced.

Shell-and-tube heat exchanger containing non-condensable gases

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Steam heat exchanger capable of evenly distributing flow

Shell-and-tube heat exchanger containing non-condensable gases