Electric heating device for pipeline

Abstract

The invention discloses an electric heating device for a pipeline. The electric heating device comprises a plurality of heat conducting pipes arranged between a fluid inlet and a fluid outlet, one endof each heat conducting pipe is in communication with the fluid inlet, the other end of each heat conducting pipe is in communication with the fluid outlet, a first heating device is arranged on theexterior of each heat conducting pipe, and a second heating device is arranged inside each heat conducting pipe. The thick film resistor and resistance wire heating pipe combined electric heating device for heating the pipeline is provided, so that the advantages of thick film resistance heating uniformity, good heat dispersion and the like are used. By rationally arranging the pipe diameter and using the internal heating manner to perform heat compensation, the problems of uneven fluid heating and the heating pipe heat exchange efficiency difference in an existing pipeline are solved, the fluid heating stability is achieved, and electric heating elements are better protected.

Description

Technical field [0001] The invention relates to an electric heating device, in particular to an electric heating device for pipelines, and belongs to the technical field of electric heating. Background technique [0002] The pipeline electric heating device is mainly aimed at the heating, heat preservation and heating of the flowing liquid and gaseous medium in industrial production to meet the actual production needs. The main principle is: the low-temperature fluid flows through the designed heat exchange channel to take away the energy generated by the heating of the electric heating element, so that the temperature of the fluid rises to meet the requirements of the production process. The current pipeline electric heating device mainly has two heating methods: 1) External heating, such as electromagnetic induction heating, where the induction coil is fixed on the outer surface of the pipeline, which is convenient for maintenance and is not limited by the shape of the pipeline...

AI Technical Summary

Problems solved by technology

At present, there are two main heating methods for pipeline electric heating devices: 1) External heating, such as electromagnetic induction heating, the induction coil is fixed on the outer surface of the pipeline, which is easy to maintain and is not limited by the shape of the pipeline, but the problem is that the coil is misplaced or Looseness is likely to cause uneven heating and too concentrated energy density, and it is difficult to heat the central fluid; 2) Internal heating, such as electric heating core heating of cluster tubes, has the advantages of high heating efficiency and good overall heating uniformity, but there are The problem is that the fluid flows irregularly in a large cavity, resulting in differences in the surface temperature of each heating tube, and a large difference in heat transfer efficiency, which can easily lead to damage to the electric heating element and cannot be replaced separately

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