Fireproof and leakproof system for high-temperature centrifugal pump

Abstract

The invention discloses a fireproof and leakproof system for a high-temperature centrifugal pump, and belongs to the field of chemical equipment. The fireproof and leakproof system comprises a pump body, a non-driving-end bearing housing, a driving-end bearing housing and a shaft, the non-driving-end bearing housing and the driving-end bearing housing are of sealed structures and are fixed onto the pump body, a bearing is positioned in a sealed cavity of each bearing housing, the shaft penetrates through the bearings and the pump body and is fittingly fixed, a gas inlet and a condensate drain opening are disposed on each bearing housing, each gas inlet is connected with a gas pipeline, a gas inlet valve is disposed on each gas pipeline, the gas pipelines are connected with a gas delivery pipe, and a condensate drain valve is arranged on each condensate drain opening. The gas delivery pipe is connected with a gas supply device. Each bearing housing is provided with a pressure monitoring device. Opening and closing of each condensate drain valve are adjusted by a remote control device. The bearing housings at two ends of the pump are of the sealed structures after change, the fireproof and leakproof system is provided with vapor seals or gas seals, when seal leakage occurs, water vapor or nitrogen is filled into the pump via a control system, oil gas leakage is stopped, and fire accidents are prevented. Furthermore, combustion can be reduced by the aid of blowing and diluting effects of the water vapor or the nitrogen, fire is quickly extinguished, and accordingly loss is reduced.

Description

technical field [0001] The invention relates to a fire-proof and leak-proof system for a high-temperature centrifugal pump, which belongs to the field of chemical equipment. Background technique [0002] Centrifugal pump is one of the widely used dynamic equipment in petrochemical production. The flow of process medium is large, the temperature is high, the outlet pressure is high, and it is toxic, harmful, flammable and explosive. Once leakage occurs, it will cause huge losses to the enterprise. Traditional centrifugal pump bearings are mechanically sealed at both ends to prevent material leakage. The principle of mechanical seal is to prevent material leakage by means of stuffing or blocking, separation, extraction or injection, flow resistance, and reverse input. However, due to the high operating temperature and high pressure of the centrifugal pump, if the flushing effect of the mechanical seal self-flushing fluid is not good, or contains trace impurities, it will caus...

AI Technical Summary

Problems solved by technology

However, due to the high operating temperature and high pressure of the centrifugal pump, if the flushing effect of the mechanical seal self-flushing fluid is not good, or contains trace impurities, it will cause deformation or wear of the mechanical seal, resulting in leakage of the mechanical seal and fire caused by material leakage. , this kind of problem often occurs in petrochemical enterprises at home and abroad

The traditional centrifugal pump bearing box is designed as an open structure, and the tiny leakage of the mechanical seal can be directly discharged to the top of the pump base and released into the air

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