RU2532061C1 - Thermosyphon heat exchange device - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: thermosyphon heat exchange device comprising the lower part - the area of heating and vaporization, and the upper part - the area of cooling and condensing, the housing with heat insulated walls and three pipes for input and output of the heated solution, a longitudinally-finned tube located in the mixing chamber of the furnace, a manometer, a safety valve, and a tap for filling the coolant, a line of overpressure compensation for filling the coolant while operation of the device, equipped with a valve, and an expander with the pipe to discharge the solution in the circulation circuit, comprises a finned tube, which extending from the furnace passes into the heat exchanger consisting of a tube of larger diameter (extending from the finned tube) and four longitudinally finned tubes of the same diameter extending from it, inclined at an angle of 60-80°, and the tubes are located perpendicular to each other.

EFFECT: improving efficiency and operational economy of the device, simplification of manufacturing process.

5 dwg

Description

The invention relates to thermosiphon heat exchangers that can be used as heat exchangers, refrigerators, temperature controllers, condensers and evaporators in the chemical, petrochemical and other industries. Heat exchangers are designed for heating and cooling, and refrigerators for cooling (with water or other non-toxic, non-fire and non-explosive refrigerant) liquid and gaseous media.

Known heat exchanger according to patent RU 954779 A, F28D 15/02, 08/30/1982, containing the lower part - the heating and evaporation zone and the upper part - the cooling and condensation zone, a housing with heat-insulated walls and pipes for the input and output of the heated solution (prototype) .

A disadvantage of the known heat exchanger is its low reliability and high operating costs.

The closest analogue to the claimed technical solution is a heat exchanger for heating a liquid, comprising a lower part — a heating and evaporation zone and an upper part — a cooling and condensation zone, a housing with heat-insulated walls and three nozzles for introducing and discharging a heated solution, a longitudinally-finned tube located in the mixing chamber of the furnace, a manometer, a safety valve and a crane for filling the coolant, an overpressure compensation line for filling the coolant when the apparatus is running, is equipped with ennuyu valve and expander with a pipe for the withdrawal of the solution in the circulation circuit (RU 2473856 C1, F28D 7/00, F28D 15/02, 27.01.2013).

A disadvantage of the known heat exchanger is the relatively low efficiency of its work, as well as the high cost and complexity of manufacturing.

The technical result of the claimed invention is to increase the efficiency and economy of the apparatus, as well as simplifying the manufacturing process.

This is achieved by the fact that the thermosiphon heat exchanger containing the lower part - the heating and evaporation zone and the upper part - the cooling and condensation zone, a housing with heat-insulated walls and three nozzles for the input and output of the heated solution, a longitudinally-finned tube located in the mixing chamber of the furnace , a manometer, a safety valve and a crane for filling the coolant, an overpressure compensation line for filling the coolant when the device is running, equipped with a valve, and an expander with a nozzle for the solution water into the circulation circuit contains a finned tube, which, leaving the furnace, passes into a heat exchanger consisting of a pipe of a larger diameter (coming out of the finned tube) and four longitudinally-finned pipes of the same diameter coming out of it, inclined at an angle of 60-80 ° moreover, the pipes are perpendicular to each other.

Figure 1 shows a General view of the heat exchanger, figure 2 shows a longitudinal section of a thermosiphon part of the heat exchanger, figure 3 shows a section aa of figure 2; figure 4 presents a section bB of figure 2; figure 5 shows a section bb In figure 1.

The thermosiphon heat exchanger, being a hermetically sealed heat exchanger, contains the lower part 1 - the heating and evaporation zone and the upper part 2 - the cooling and condensation zone, the housing 6 with insulated walls and pipes 7 and 8, respectively, for the input and output of the heated solution. In the lower part 1 of the heat exchanger there is a longitudinally finned tube 3 located in the mixing chamber of the furnace 16, while the finned tube 3, leaving the furnace 16, passes into the heat exchanger, which consists of a housing 6, a pipe 4, of a larger diameter than the finned tube 3 coming out of the pipe 4 of four pipes 5 inclined at an angle of 60-80 ° and arranged perpendicular to each other, the walls of the body 6 being insulated with a heat-insulating material, for example, penofol. The housing 6 has four nozzles: a nozzle 7 for introducing a heated solution, a nozzle 8 for withdrawing a heated solution in a further production process, a nozzle 9 in the lower part of the housing 6, designed to empty the capacity of the housing 6, and an expander 10 with a nozzle 11 for withdrawing the solution into the circulation outline (not shown). In addition, the apparatus is equipped with a pressure gauge 13, a safety valve 12 and a valve 14 for filling the coolant and has a line 15 for compensating for excess pressure for filling the coolant when the apparatus is operating, equipped with a valve.

Thermosiphon heat exchanger operates as follows.

Located in the mixing chamber of the furnace 16, in the zone of heating and evaporation of the heat exchanger, the finned tube 3 is filled with water (about 11 l). Under the influence of high temperatures (about 600 ° C) in the mixing chamber of the furnace 16, the water heats up, boils and turns into steam (evaporates). Moreover, it absorbs a large amount of heat (heat of vaporization), which is transferred by steam to another, cooler part 2 of the heat exchanger in the cooling and condensation zone, where the steam condenses and gives up the absorbed heat to the heated solution. Next, the condensed liquid again returns to the heating and evaporation zone. Due to the fact that the pipes 5 are inclined and there are no horizontal sections in the condensation zone, no stagnant condensation zones are created. The solution continuously enters the housing 6 through the nozzle 7 and then either is taken into the process through the nozzle 8, or returns to the return line of the circulation circuit through the expander 10 and the nozzle 11. The design of the upper part of the heat exchanger allows you to uniformly heat the solution without resorting to forced mixing, with This heat exchanger operates in an economical mode, because due to the compact design of the lower part, it blocks the gas flow by only 3%, thereby not creating tangible obstacles to the passage of gas into the dryer and without affecting the gas flow.

A thermosiphon heat exchanger is a device that combines a properly sealed heat exchanger - a thermosiphon filled with distilled water; and a container for heating the working solutions to a boiling point, operating in a flow mode.

In the operating mode of the installation, the temperature head in the lower part of the heat exchanger is 420 ÷ 480 ° C, in the upper part 40 ÷ 60 ° C.

The heat transfer capacity is 90 ÷ 100 kW.

Thus, the design of the claimed thermosiphon heat exchanger allows to increase the efficiency and economy of its work and simplify the process of its manufacture.

Claims (1)

A thermosiphon heat exchanger containing the lower part — the heating and evaporation zone and the upper part — the cooling and condensation zone, a housing with heat-insulated walls and three nozzles for the inlet and outlet of the heated solution, a longitudinally-finned pipe located in the mixing chamber of the furnace, a pressure gauge, and a safety valve and a crane for filling the coolant, a line for compensating for overpressure for filling the coolant when the apparatus is running, equipped with a valve, and an expander with a nozzle for withdrawing the solution into the compass ion circuit, characterized in that the finned tube, leaving the furnace, goes into a heat exchanger consisting of a pipe of a larger diameter coming out of the finned tube and four longitudinally-finned pipes of the same diameter coming out of it, inclined at an angle of 60-80 °, and the pipes are perpendicular to each other.

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