Reduction of fouling in heat exchangers

A technology of heat exchangers and heat exchange tubes, applied in heat exchange equipment, heat transfer modification, cleaning heat transfer devices, etc., can solve the problems of good heat transfer thickness, resistance to fouling, insufficient, etc., to promote liquid heat transfer , the effect of reducing fouling

Inactive Publication Date: 2009-08-05
EXXON RES & ENG CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, traditional treatments are often insufficient as either are too thick for good heat transfer or do not resist fouling

Method used

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  • Reduction of fouling in heat exchangers
  • Reduction of fouling in heat exchangers
  • Reduction of fouling in heat exchangers

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Embodiment Construction

[0022] The invention will now be described in more detail with reference to the accompanying drawings. figure 1is a shell and tube heat exchanger 30 upstream of a furnace (not shown) and employing the principles of the invention. The shell and tube heat exchanger 30 disclosed herein illustrates one application of the present invention for reducing sulfidation or sulfidic corrosion and deposit fouling in refinery and petrochemical applications. Shell and tube exchanger 30 is just one heat transfer component that falls within the scope of the corrosion reduction and fouling mitigation measures of the present invention. The principles of the present invention are intended to be applied to other heat exchangers including, but not limited to, spiral heat exchangers, double tube heat exchangers, and plate and frame heat exchangers having at least one heat transfer element. The principles of the present invention are intended to be applied to other heat transfer components, includin...

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Abstract

A method for reducing the formation of deposits on the inner walls of a tubular heat exchanger through which a petroleum-based liquid is flowing comprises applying one of fluid pressure pulsations to the liquid flowing through the tubes of the exchanger and vibration to the heat exchanger to effect a reduction of the viscous boundary layer adjacent the inner walls of the tubular heat exchange surfaces. Reduction of the viscous boundary layer at the tube walls not only reduces the incidence of fouling with its consequential beneficial effect on equipment life but it also has the desirable effect of promoting heat transfer from the tube wall to the liquid in the tubes. Fouling and corrosion are further reduced by the use of a coating on the inner wall surfaces of the exchanger tubes.

Description

technical field [0001] The present invention relates to reducing fouling in heat exchangers. The invention also relates to processes and devices for preventing the deposition of solid matter on the inner walls of heat exchangers. Background technique [0002] Heat exchangers are well known and widely used in the chemical process industry and petroleum refining. Heat exchangers have a tendency to foul due to deposits of solid matter and must be removed from operation from time to time for cleaning. Fouling in heat exchangers for petroleum-based fluids can result from a variety of mechanisms, including chemical reactions, corrosion, deposition of insoluble species, and deposition of species due to insolubility due to temperature differences between the fluid and the heat exchange walls . Chemical reactions and deposition of insoluble substances are two important fouling mechanisms. In both fouling mechanisms, reducing the viscous sublayer (or boundary layer) near the wall ...

Claims

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Application Information

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IPC IPC(8): F28F19/02F28G7/00
CPCF28F13/10F28F19/00F28F19/02F28G7/00
Inventor L·R·克莱维纳I·A·科迪A·E·库珀S·考尔格罗伍H·L·胡夫曼J·D·洛博宋利民H·A·伍尔夫G·B·布龙斯G·A·卢茨M·S·也甘
Owner EXXON RES & ENG CO
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