Spiral baffle electric heater with circular tube arrangement in "slanted sun" unit

A technology of electric heaters and baffles, which is applied in the direction of fluid heaters, water heaters, air heaters, etc., can solve the problems of difficulty and difficulty in processing baffles, shorten the processing and manufacturing time, and reduce the heat transfer area , The effect of improving the heat transfer coefficient

CN104061674BInactive Publication Date: 2016-08-17SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-08-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

A spiral baffle electric heater with oblique Japanese unit circular tube arrangement, the tube bundle assembly includes U-shaped electric heating tube group, tube plate, annular support plate, inclined baffle group, tie rod group, single-ended inclined sleeve group, double-ended inclined casing group; the U-shaped electric heating tube group is arranged in circles on the grid points distributed in a regular triangle according to the circular pipe layout scheme of the oblique sun character unit; the oblique sun character unit is occupied by the "oblique sun character" Composed of 6 grid points, 2 long and 1 short, 3 U-shaped electric heating tubes; 3 sets of oblique sun-shaped units are symmetrically arranged in the center of the first circle, and oblique sun-shaped units are symmetrically arranged in the second to seventh circles according to the center of six equal divisions ; There are 6 groups in the second circle, and 6 groups of oblique Japanese word units are added for each increased circle in the future; the inclined baffle groups are connected end-to-end with 3 baffles in each cycle, and the fluid in the shell surrounds U-shaped electric heating tube bundle spiral flow. The electric heater of the invention has high heat transfer coefficient, low flow resistance and compact structure, can save materials, reduce costs and prolong service life.
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Description

technical field

[0001] The invention relates to an electric heater, in particular to a helical baffle electric heater with a "slanted sun" unit circular pipe arrangement. Background technique

[0002] Electric heaters are commonly used equipment in industrial engineering, and the power covered varies. At present, the existing low-power electric heaters mainly use three U-shaped tube electric heaters occupying the vertices of a regular hexagon as the unit; high-power cluster U-shaped electric heaters usually adopt U-shaped electric heating tubes arranged in multi-circle rings, and the tube bundle is supported by bow-shaped baffles. There are disadvantages such as low heat transfer coefficient and large volume, and the required heat transfer area of ​​the electric heater is relatively large. . The arc baffle cluster electric heater scheme with U-shaped electric heating tubes arranged in a multi-circle ring usually has a hollow area in the middle. In order to avoid short circu...

Examples

Embodiment Construction

[0028] Embodiment 1 of the present invention is a spiral baffle electric heater with a tube bundle assembly of 63 U-shaped tubes with 3 circles of "oblique sun" units, and its schematic diagram is as follows Figure 1 to Figure 5 .

[0029] Embodiment 2 of the present invention is a spiral baffle electric heater with a tube bundle assembly of 387 U-shaped tubes with 7 circles of "oblique sun" units, Figure 6 A schematic diagram of the tube bundle assembly in Embodiment 2 in a parallelogram grid coordinate system in which the x-coordinate axis and the y-coordinate axis form an included angle of 120° is shown.

[0030] A spiral baffle electric heater with circular pipes in "slanted sun" units, including a tube bundle assembly 1, a shell assembly 2, a seal 3, a fastener group 4, a small copper bar group 5, a casing 6, screw group 7 and bus copper bar group 8; the shell assembly 2 includes a cylinder 2-1, a head 2-2, a shell flange 2-3, an inlet 2-4 and an outlet 2-5, and the cy...