CN209459468U - A kind of major diameter tilted spiral shape baffle heat exchanger - Google Patents

Abstract

The utility model belongs to shell-and-tube heat exchanger field of energy-saving technology, for the low heat transfer rate for overcoming traditional heat exchangers, the utility model discloses a kind of major diameter tilted spiral shape baffle heat exchangers, including shell, heat exchanger tube, baffle plate, pull rod distance sink tube, tube sheet and support plate.Baffle plate is made of the more equal part helical baffles of several groups, every group of helical baffles form continuous 360 ° of helical ducts along shell axis, more equal part helical baffles within the scope of 360 ° of each screw pitch are made of six pieces of elliptic sector plates, are on the whole spiral line type；Six pieces of sector flat plate tilt angles of every group of screw pitch may be the same or different, and six pieces of sector flat plate tilt angles of same group of screw pitch can also be different, to make shell side medium journey pulse type spiral flow, the boundary layer of heat exchanger tube is destroyed, core media flow state is improved, improves heat exchange efficiency；In addition fluid flows not big commutation in equipment, can not only reduce shell-side pressure drop, but also can prevent induced vibration.

Description

A kind of major diameter tilted spiral shape baffle heat exchanger

Technical field

The utility model belongs to shell-and-tube heat exchanger field of energy-saving technology, and in particular to arrives a kind of major diameter tilted spiral Shape baffle heat exchanger.

Background technique

In the design of existing shell-and-tube heat exchanger, mainly use segmental baffle structure, this structure have it is simple and reliable, The features such as adaptable and convenient processing and manufacture, but with the development of petrochemical industry, how to further increase shell-and-tube heat exchanger Performance, especially reduction shell-side pressure drop, improve shell side heat transfer efficiency be emphasis concerned by people.Traditional shell-and-tube heat exchanger There are flow dead zones for Z-shaped process baffle plate, and flow resistance is big, and heat exchange efficiency is low.Spiral baffle heat exchanger has shell side medium The low advantage of continuous flowing, shell-side pressure drop, obtained more use in recent years.But the spiral baffling in existing shell-and-tube heat exchanger Plate be it is interconnected one by one by certain spiral angle by four pieces of fan-shaped plates in each screw pitch, tube bundle support span is opposite It is larger, it is easy the disadvantages of fouling and induced vibration destroy, due to the effect of centrifugal force for major diameter equipment, core is easy to

It is detained.And major diameter tilted spiral shape baffle heat exchanger can contract under the premise of flow area is basically unchanged Small support distances avoid tube bundle vibration, reduce shell-side pressure drop, improve heat exchanger core flow regime.

Summary of the invention

The utility model is a kind of major diameter tilted spiral shape baffle heat exchanger, by changing adjacent baffle shape Shape and the angle form of the composition improve shell side media flow characteristic, reduce leakage current short circuit, form spiral turbulence fluid, eliminate heat exchange Pipe back side dead zone improves heat exchanger core flow regime, so that relative increase effective heat exchange area, improves heat exchanger efficiency, drop Low shell-side pressure drop, avoids tube bundle vibration from destroying.

A kind of major diameter tilted spiral shape baffle heat exchanger include shell, heat exchanger tube, baffle plate, pull rod distance sink tube, Tube sheet and support plate, the utility model technical scheme applied to solve the technical problem is: baffle plate is by the more equal part spiral shells of several groups Baffle groups are revolved at every group of helical baffles form continuous 360 ° of helical ducts, each screw pitch along shell axis More equal part helical baffles within the scope of 360 ° are made of six pieces of elliptic sector plates, and heat exchanger tube is fixed on across helical baffles In shell, multiple groups screw pitch is repeated along shell axis, is on the whole spiral line type, the movement of medium journey zigzag shape.Every group of screw pitch Six pieces of sector flat plate tilt angles may be the same or different, and six pieces of sector flat plate tilt angles of same group of screw pitch can also With difference, multiple groups helical baffles repeated arrangement, so that shell side medium journey pulse type spiral be made to flow, the boundary of heat exchanger tube is destroyed Layer improves core media flow state, increases effective heat transfer area, and the surface of entire heat-exchanging tube bundle is substantially all to become and effectively pass Heat exchange efficiency is improved in hot face.In addition the curvature of helical duct is relatively uniform, and fluid flows not big commutation in equipment, always Resistance it is small, can not only reduce shell-side pressure drop, but also flow-induced vibration can be prevented.Each adjacent two pieces of sector flat plates have overlapping portion Point, it being connected using the overlapping mode of staggeredly point contact, there is a stagger angle in connection, and it is connected and is positioned by pull rod distance sink tube, Avoid Short circuit leakage.

Detailed description of the invention

FIG. 1 is a schematic structural view of the utility model；

In figure, fixed tube sheet (1), heat exchanger tube (2), helical baffles (3), slideway (4), support plate (5), pull rod distance sink tube (6).

Specific embodiment

A kind of major diameter tilted spiral shape baffle heat exchanger is based on traditional shell-and-tube heat exchanger, by shell-and-tube Baffle plate in heat exchanger is changed to helical baffles, and other structures are all made of the conventional hardware of shell-and-tube heat exchanger.

In Fig. 1, a kind of major diameter tilted spiral shape baffle heat exchanger include shell, heat exchanger tube, helical baffles, Spacing tubular tie, tube sheet and support plate installation connect and compose.The baffle plate of heat exchanger is by the more equal part helical baffles (3) of several groups Composition, every group of helical baffles (3) form continuous 360 ° of helical ducts, 360 ° of ranges of each screw pitch along shell axis It is made of in more equal part helical baffles six pieces of elliptic sector plates, each elliptic sector plate is surrounded on shell axis and using friendship The overlapping mode of wrong point contact connects, and there is a stagger angle in connection, is axially unfolded in the shape of a spiral along shell, spiral baffling Plate (3) passes through pull rod distance sink tube (6) in sequence, and spacing tubular tie (6) one end is connected on tube sheet (1), and branch is fixed in one end It holds on plate (5).Slideway (4) is installed on helical baffles (3), is filled convenient for the pumping of tube bank.Six pieces of sector flat plates of every group of screw pitch Tilt angle may be the same or different, and six pieces of sector flat plate tilt angles of same group of screw pitch can also be different, multiple groups spiral shell Baffle plate repeated arrangement is revolved, is on the whole spiral line type, medium helically linear movement, to make shell side medium in pulsed spiral shell Eddy flow is dynamic, destroys the boundary layer of heat exchanger tube, improves core media flow state, increases effective heat transfer area, in addition helical duct Curvature it is relatively uniform, fluid flows not big commutation in equipment, and total resistance is small, can not only reduce shell-side pressure drop, but also It can prevent flow-induced vibration.

Claims (2)

1. a kind of major diameter tilted spiral shape baffle heat exchanger, including shell, heat exchanger tube, baffle plate, pull rod distance sink tube, pipe Plate and support plate, it is characterized in that: baffle plate uses the more equal part helical baffles of several groups, every group of baffle plate shape along shell axis At continuous 360 ° of helical duct, the arrangement of multiple groups screw pitch is repeated along shell axis, more equal parts within the scope of 360 ° of each screw pitch Helical baffles are made of six pieces of sector flat plates.

2. a kind of major diameter tilted spiral shape baffle heat exchanger according to claim 1, it is characterized in that: every group of screw pitch A kind of six pieces of arrangements of sector flat plate tilt angle be it is identical, another arrangement be tilt angle difference, same group Six pieces of sector flat plate tilt angle arrangements of screw pitch can be different, multiple groups helical baffles repeated arrangement.