Embedded spiral baffle plate and heat exchanger

Abstract

The invention belongs to the technical field of heat exchange equipment, and relates to an embedded spiral baffle plate and a heat exchanger. The baffle plate comprises an inner-layer baffle plate, anouter-layer baffle plate, and a middle support positioned between the inner-layer baffle plate and the outer-layer baffle plate; the inner-layer baffle plate and the outer-layer baffle plate are spirally annular, and are opposite in spiral direction; the circular section radius ratio of the inner-layer baffle plate to the outer-layer baffle plate is not smaller than 1.4: 2; the lead angle of theinner-layer baffle plate is not bigger than the lead angle of the outer-layer baffle plate; the middle support is uniformly provided with multiple bypass holes whose circumcircle diameters are not bigger than 6 mm; through holes for enabling heat exchange pipes to pass through are uniformly distributed on the inner-layer baffle plate and the outer-layer baffle plate; and the hole gap of the inner-layer baffle plate is not smaller than the hole gap of the outer-layer baffle plate. The spiral baffle plate difficultly generates bending deformation and twisting deformation, and can effectively guarantee uniform flowing of cooling mediums in heat exchanger shells; the flow resistance of the cooling mediums is stable and incapable of being increased along with the operation time; and the heat exchange pipes can be excellently supported by the baffle plate.

Description

technical field [0001] The invention belongs to the technical field of heat exchange equipment, and relates to a nested spiral baffle and a heat exchanger, in particular to a shell-and-tube heat exchanger suitable for the fields of refrigeration, petrochemical industry, energy, seawater desalination, etc., especially It relates to a new type of nested spiral baffle inside the heat exchanger. Background technique [0002] Spiral baffle is a functional component of heat exchanger with drainage function, which is widely used in various shell and tube heat exchangers. At present, a shell-and-tube heat exchanger with high cost performance is a single-plate fixed form. This type of shell-and-tube heat exchanger mainly includes the following parts: a heat exchanger shell with a tube plate fixedly connected at one end, and a heat exchanger inside the shell. Spiral circular baffles, U-shaped heat exchange tube bundles interspersed with baffles, shell inlet and outlet pipes, refriger...

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Problems solved by technology

[0003] In view of this, in order to solve the problem that the existing cooling medium scours the heat exchange tubes and baffles, the heat exchange tubes will squeeze the baffles after being stressed, and the extrusion deformation of the baffles will lead to the low heat transfer efficiency of the heat exchanger , providing a nested spiral baffle and a heat exchanger, the spiral baffle can reduce this adverse effect, is not prone to bending deformation and twisting deformation, and can effectively ensure that the cooling medium is uniform in the heat exchanger shell Flow, the flow resistance of the cooling medium is stable and does not increase during the operation, and the baffle can well support the heat exchange tube

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