Automatic impurity removal heat exchanger for liquid-phase flow-rotating mixed settled liquid and process method and application thereof

Abstract

The invention discloses a process method using an automatic impurity removal heat exchanger for a flow-rotating mixed settled liquid. The process method comprises the steps that a heat exchange liquid phase medium needing impurity removal enters the heat exchanger through a tangent inlet 1 in the upper portion of a barrel of a shell layer 8, is mixed with a medium in the heat exchanger, then conducts flow rotating and temperature adjustment along the inner barrel wall of the shell layer 8, conducts countercurrent flow heat exchange with a heat exchange medium through an inner heat exchange coil 9, and flows downwards under guiding of a guiding barrel, and meanwhile, impurity particles with large specific gravity are brought into the heat exchange liquid phase medium, impurities generated or separated out in the heat exchange process move towards the shell wall under the action of rotational flow centrifugal force, the speed is decreased when the impurities are close to the shell wall, and when the centrifugal force and buoyancy are not enough to support the impurities with large specific gravity, the impurities automatically settle downwards and are discharged through a bottom discharging opening 5. The process method using the automatic impurity removal heat exchanger for the liquid-phase flow-rotating mixed settled liquid has the advantages of being simple in structure, not prone to scale, long in operation period, high in reliability and low in operation cost, and is particularly suitable for occasions where the temperature difference between the heat exchange media is large, the flow is small, and the impurity removal requirement exists in the heat exchange process.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a liquid-phase swirling mixed downflow automatic impurity-removing heat exchanger and a process method thereof. [0002] technical background [0003] In petrochemical, chemical machinery and other industries, 1. Some high-temperature medium pumps generally adopt a mechanical seal structure. Most of the mechanical seals use self-reflux coolant to cool the mechanical seal. Due to the small return hole of the mechanical seal and the fine sealing surface, the sealing liquid requires Can not contain solid particle impurities. However, the self-reflux coolant of high-temperature oil pumps often contains a small amount of mechanical impurities. If it is not removed, long-term accumulation will cause blockage of the return hole, causing the cooled mechanical seal return fluid to fail to return to the mechanical seal, resulting in heat generated during the operation ...

AI Technical Summary

Problems solved by technology

However, the self-reflux coolant of high-temperature oil pumps often contains a small amount of mechanical impurities. If it is not removed, long-term accumulation will cause blockage of the return hole, causing the cooled mechanical seal return fluid to fail to return to the mechanical seal, resulting in heat generated during the operation of the mechanical seal. The life of the mechanical seal is shortened if it cannot be removed in time; or the solid particles return to the mechanical seal with the coolant, causing damage to the mechanical seal

Therefore, removing a small amount of mechanical impurities in the self-reflux cooling liquid of the return mechanical seal is an important factor to prolong the life of the mechanical seal of the pump; and when the temperature difference between the high-temperature medium and the heat exchange medium is too large, it is easy to cause excessive stress on the interface of the heat exchange tube, The life of the heat exchange tube is greatly reduced

2. In the partial heat exchange crystallization and impurity removal process, if the temperature difference between the heat exchange medium to be crystallized and the heat exchange medium medium is too large, the local saturation of the heat exchange medium will be too large and crystallize on the heat exchange tube, which will affect the performance of the crystallization heat exchanger. Heat exchange effect and operation cycle; 3. In the traditional heat exchanger process, the timely discharge of scaled sediments such as large crystal particles and impurities, the reduction of heat exchange temperature difference and the function of impurity removal are not considered, and there is continuous use Disadvantages of short cycle

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