CN110553529A - Turbulent flow enhanced heat transfer graphite block and graphite heat exchanger thereof - Google Patents

Abstract

The present invention relates to a graphite block for enhanced turbulent heat transfer and a graphite heat exchanger thereof. The graphite block is provided with a plurality of longitudinal channels running through it longitudinally, and a number of transverse channels are arranged in a horizontal connection, and the longitudinal channels and the transverse channels are kept independent of each other; The longitudinal channel and/or the transverse channel is a concave-convex spiral inner wall. The design is reasonable and the concept is ingenious. The concave-convex spiral inner wall is used to increase the heat transfer area and turbulent flow, which effectively improves the heat transfer efficiency of the graphite block, and at the same time slows down the deposition of material scale in the channel.

Description

Enhanced Turbulent Heat Transfer Graphite Block and Its Graphite Heat Exchanger

Background technique

The longitudinal and transverse channels of the graphite block of the traditional graphite heat exchanger are straight cylinders, and the vapor or liquid enters the longitudinal channels to form an axially slow laminar flow and a cylindrical state. There is no external power pressurization, and the cylindrical gas or liquid flow rate is generally low. at 0.1m/s. There have been no changes and breakthroughs since the development of graphite equipment for decades.

Contents of the invention

In order to solve the above problems, the present invention proposes a graphite block for enhanced turbulent heat transfer and a graphite heat exchanger thereof.

Technical content of the present invention:

An enhanced turbulent heat transfer graphite block, the graphite block is provided with a number of longitudinal channels running through it longitudinally, and a number of transverse channels are provided in a horizontal connection, and the longitudinal channels and the transverse channels are kept independent of each other; the longitudinal channels and/or the transverse channels It is a concave-convex spiral inner wall.

The use of concave-convex spiral inner walls greatly increases the heat transfer surface area of the channel, and the measured heat transfer area increases by 60%; the flow rate of vapor or liquid materials in the channel is increased several times, changing the original laminar flow to turbulent flow, and Since the movement of the material particle is changed from the original linear movement to the spiral curve movement, the curvature correction is added to further enhance the turbulence effect; thus effectively increasing the heat transfer efficiency of the water side. At the same time, increasing the flow rate and the spiral curve movement also slow down the deposition of material scale.

To further improve and refine the above technical solution, the graphite block is block or column.

To further improve and refine the above technical solution, several longitudinal channels are arranged in a matrix, and several horizontal channels are arranged in a matrix, and the longitudinal channels and the horizontal channels alternate.

A graphite heat exchanger comprises a body, and a graphite block is fixedly installed in the body; the graphite block is the above-mentioned graphite block; the heat exchange efficiency of the heat exchanger is effectively improved.

The invention has the advantages of reasonable design, ingenious conception, increased heat transfer area and turbulent flow by using the concave-convex spiral inner wall, effectively improving the heat transfer efficiency of the graphite block, and slowing down the deposition of material scale in the channel at the same time.

Description of drawings

Figure 1 is a schematic cross-sectional view of a graphite block for enhanced turbulent heat transfer.

Figure 2 is a schematic cross-sectional view of a graphite heat exchanger.

Figure 3 is a top view of the graphite heat exchanger.

In the figure, graphite block 1 longitudinal channel 1-1 transverse channel 1-2 body 2.

Detailed ways

As shown in Figure 1, a kind of enhanced turbulent heat transfer graphite block, the graphite block 1 is provided with several longitudinal channels 1-1 vertically, and several transverse channels 1-2 are arranged transversely, the longitudinal channels 1-1, transverse The channels 1-2 are independent of each other; the longitudinal channels 1-1 are concave-convex spiral inner walls; the graphite block 1 is block or columnar; several longitudinal channels 1-1 are arranged in a matrix, and several transverse channels 1-1 2 are arranged in a matrix, and the longitudinal channels 1-1 alternate with the transverse channels 1-2.

As shown in Figures 2 and 3, a graphite heat exchanger includes a body 2 in which a graphite block is fixedly installed; the graphite block is the above-mentioned graphite block 1 .

Due to the limitation of written expression, there are objectively unlimited specific structures. For those of ordinary skill in the art, without departing from the principle of the present invention, some improvements, modifications or changes can also be made, or Combining the above-mentioned technical features in an appropriate manner; these modifications, changes or combinations, or directly applying the idea and technical solution of the invention to other occasions without improvement shall be regarded as the protection scope of the present invention.

Claims (4)

1. A graphite block for strengthening turbulent flow heat transfer is provided, wherein a plurality of longitudinal channels are longitudinally arranged on the graphite block in a penetrating manner, a plurality of transverse channels are transversely arranged on the graphite block in a penetrating manner, and the longitudinal channels and the transverse channels are mutually independent; the spiral duct is characterized in that the longitudinal duct and/or the transverse duct is a concave-convex spiral inner wall.

2. The graphite block for enhancing turbulent heat transfer according to claim 1, wherein the graphite block is in a block shape or a column shape.

3. The graphite block for enhancing turbulent heat transfer according to claim 1, wherein the plurality of longitudinal channels are arranged in a matrix, the plurality of transverse channels are arranged in a matrix, and the longitudinal channels alternate with the transverse channels.

4. A graphite heat exchanger comprises a body, wherein a graphite block is fixedly arranged in the body; characterized in that the graphite block is the graphite block according to any one of claims 1 to 3.