Heat exchanger

FIELD: heat engineering, applicable in heat exchanging apparatus with recuperative heat transfer in various branches of industry.

SUBSTANCE: the heat exchanger has a body with pipe-branches for feeding and discharging the working media and ducts for the heat transfer agents formed by the ribs adjoining the body shell, the body is made in the form of a cylindrical shell enclosing the heat exchange surface made as a double screw thread with formation of two screw ducts of the same section separated by a wall serving as a rib of the heat exchange surface, feed and removal of heat-transfer agents are accomplished by means of manifolds, in which partitions are installed for separation of the flows of heat-transfer agents, besides, the roughness of the heat exchange surface makes it possible to use viscous heat-transfer agents, and at feeding of heat-transfer agents to the screw ducts separation of the heat-transfer agents is not required.

EFFECT: enhanced operating reliability and intensification of heat exchange.

 

The invention relates to heat engineering, heat-exchange apparatus with recuperative heat transfer, and can be used in various industries.

Known plate heat exchanger package containing perforated plates, alternating spacers and forming two channels for production environments [1].

For working media channels is carried out in vertical and horizontal directions through the walls of the plates, the flow of working medium moving along curved lines, which intensifies the heat. Known design is bulky and difficult to manufacture.

A known heat exchanger pipe with multiple helical ribs on the outer surface of the inner tube, forming in the annular space of the screw channels and the outer shell (casing), forming a space for supplying and discharging cooling and refrigerated environments. When this screw channels divided by partitions into separate cavities [2], arranged coaxially with the pipe.

This design is bulky and requires special tooling and complex calculations, which makes it quite difficult to manufacture.

Closest to the claimed is the heat exchanger pipe, comprising a housing with connections for supplying and discharging working environments and channels for fluids, formed by the annular gap between concentric spaced four cylindrical shells, hosting edge, adjacent to the surfaces of the shells, and at the entrance to the staging of them are ring, connected in series between the slots and partitions, and the ribs are located in the intermediate channel is made only on the input and output of the annulus, and on exit they are parallel to the axis of the heat exchanger and form straight channels [3].

The disadvantage is of metal and the complexity of the design.

The task of the invention is to create simple, does not require accurate calculations in the manufacture nematallah compact heat exchanger, providing a high degree of heat transfer and a large area of contact heat exchange surface.

The technical result achieved by the invention is to increase reliability and intensification of heat exchange.

This technical result is achieved in that in a heat exchanger, comprising a housing with connections for supplying and discharging working environments and channels for fluids formed by the edges adjacent to the hull shell, according to the invention, the casing is made in the form of a cylindrical shell in which is enclosed heat exchange surface in the form of dvuhseriynogo screw auger, forming two helical channel, the same is ecene, separated by a wall, which is the edge of the screw, inlet and outlet of heat transfer fluids through the collectors that have dividers to separate the flow of fluids. In addition, the heat exchange surface formed dvuhaktnoy screw rolling, providing a surface with low roughness to reduce the hydraulic resistance and allows you to apply viscous fluids, two screw channel does not require separation while supplying the coolant to "clean" and " dirty".

The heat exchanger can be used for heat exchange between two media (fluids) in the liquid or gas phase (different mix) for processes of heating, cooling or condensation.

Material for the manufacture of heat-exchange surface can serve as aluminum, copper, brass and other materials.

Material housing and collectors is different and is selected depending on the parameters and properties of the used coolant. For the manufacture of heat-exchange surfaces are used cold rolling mills of the type HPRT.

The present invention is illustrated in the drawing, which shows a General view of the heat exchanger in the section.

The heat exchanger consists of a housing 1, in which a total heat exchange surface, made in the form dvuhseriynogo screw auger, forming two helical channel 2, RA is divided by a wall 3, collectors 8 and branch pipes 4, 5, 6, 7. To separate the flow of fluids in the reservoir has walls 9.

The heat exchanger works as follows.

The scheme of movement of fluids - counter-current or co-current.

Operating position (horizontal, vertical, inclined) depends on the heat transfer and heat exchange conditions.

Heating (cooling) fluid is fed into the heat exchanger through the inlet 4 of the collector 8. The heated (cooled) fluid is supplied through the inlet 7 in the opposite manifold 8 of the heat exchanger in the case of pricewatch or inlet pipe 6 of the same collector 8, and heating the coolant in the case of co-current. Drainage of fluids through the output nozzles 5 and 6 of the reservoir 8 in the case of countercurrent or 5 and 7 in the case of co-current. When the coolant flows along the spiral channel 2 is turbulization of the flow, intensifying the heat transfer.

Sources of information

1. A.S. 1323843, F 28 D 9/00, F 28 F 3/00. The plate heat exchanger package.

2. A.S. 1062496, F 28 D 7/10. The heat exchanger pipe in pipe".

3. Patent 288873, F 28 D 7/10. The heat exchanger pipe.

A heat exchanger comprising a housing with connections for supplying and discharging working environments and channels for fluids formed by the edges adjacent to the shell design, which is what I am, the body is made in the form of a cylindrical shell in which is enclosed heat exchange surface made dvuhaktnoy with the formation of two screw channels of the same cross-section, separated by a wall, which is the edge of the heat exchange surface, inlet and outlet of heat transfer fluids through the collectors that have dividers to separate the flow of fluids, in addition, the roughness of the heat-exchange surface allows the use of viscous fluids, and supplying the coolant in the screw channels does not require separation of fluids.



 

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Heat exchanger // 2269080

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EFFECT: enhanced operating reliability and intensification of heat exchange.

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