Centrifugal pump suitable for high temperature and high coagulating point medium and its use method

Abstract

The invention relates to a pump, in particular to a centrifugal pump applicable to high-temperature and high-freezing point media and a use method thereof, which is characterized in that: before the pump is started, steam higher than the freezing point of the media is input in a pump cavity and a steam heating jacket from a steam heating inlet and a steam blowing inlet for heating the pump and blowing off residual media in the pump cavity; when the pump operates, the steam heating jacket is used for controlling the media temperature of the pump to be higher than the freezing point; after the pump stops operating, a pump accessing valve is closed; the steam is input in the pump cavity from the steam blowing inlet; the frozen residual media in the pump cavity is liquefied and cleared from the pump cavity, thereby solving the difficulties caused by high temperature and high freezing point. The pump of the invention brings sealing and flushing media of a working pump to a sealing cavity and a pump cavity of a stand-by pump, causes the media of the stand-by pump to be in flowing state and improves the using performance of the centrifugal pump of the high-temperature and high-freezing point media.

Description

technical field [0001] The invention relates to a pump, in particular to a centrifugal pump suitable for high-temperature, high-freezing-point medium and its application method. Background technique [0002] In petrochemical equipment, a centrifugal pump that can work under high temperature and high freezing point medium conditions is needed. For example, the working medium temperature of the pump can exceed 300°C, and the freezing point of the conveyed medium can exceed 100°C. This not only requires the pump material, static seal, and medium mechanical seal to meet the high temperature working requirements, but also needs to fully consider the impact of high temperature and high freezing point of the medium on the start, operation, and shutdown of the pump, so as to improve the operating reliability and operating cycle of the pump. The high freezing point also brings some problems. For example, the high freezing point may cause the centrifugal pump to accumulate in the inne...

AI Technical Summary

Problems solved by technology

During the operation of the pump, the medium in the pump cavity and the sealing cavity of the working pump is in a flowing state. Although the standby pump has a steam insulation jacket for heat preservation, the medium in the pump cavity and the sealing cavity is in a static state and is easy to solidify, which affects the Working quality of centrifugal pump

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