Centrifugal pump self-absorbing device used for easily-crystallized medium

Abstract

The invention relates to a centrifugal pump self-absorbing device used for an easily-crystallized medium, and belongs to the technical field of centrifugal pumps. The centrifugal pump self-absorbing device used for the easily-crystallized medium comprises a pressure stabilization cylinder and a jetting device; a pressure stabilization cylinder air inlet pipe is arranged on the top of the pressurestabilization cylinder, and a pressure stabilization cylinder steam outlet pipe is arranged on the lower part of the pressure stabilization cylinder; a pressure stabilization condensate emission pipeis arranged on the bottom of the pressure stabilization cylinder; the pressure stabilization cylinder air inlet pipe communicates with a steam pipeline inlet pipe; the pressure stabilization cylindersteam outlet pipe communicates with a steam pipeline outlet pipe; and the jetting device is arranged in the pressure stabilization cylinder and comprises a jetting device nozzle, a jetting device airinlet pipe, a jetting device absorbing-in pipe and a jetting device discharging pipe. The centrifugal pump self-absorbing device used for the easily-crystallized medium is applicable to high-temperature, toxic, harmful, high-adhesive, easily-crystallized high-corrosive media such as sulfur in the oil chemistry industry, and can be combined with a centrifugal pump, so that an upwards-absorbing function of the centrifugal pump is realized.

Description

technical field [0001] The invention relates to the technical field of centrifugal pumps, in particular to a centrifugal pump self-priming device for easily crystallized media. Background technique [0002] Sulfur is a poisonous and harmful chemical raw material. It is solid at normal temperature. When the temperature of sulfur reaches the melting point, sulfur will melt into liquid sulfur with flow properties. The viscosity of liquid sulfur changes with the temperature. Generally, when it is first melted, the viscosity decreases with the increase of temperature. When the temperature exceeds 159°C, the viscosity increases sharply with the increase of temperature. When the temperature continues to increase to 190°C, the viscosity reaches an extreme. Large value, when the temperature exceeds 190°C, the viscosity returns to the original characteristics, and the viscosity is the smallest at 130-160°C, which is beneficial to the transportation of liquid sulfur. Once the pump is ...

AI Technical Summary

Problems solved by technology

Once the pump is stopped, the sulfur in the pipeline and pump will condense in the pump and pipeline due to the temperature drop, making it difficult to start the pump again and damage the mechanical seal. Because of its special physical characteristics, the transportation of liquid sulfur has always been a problem

[0003] At present, the commonly used delivery pumps are long-axis submerged pumps and electronically controlled diaphragm self-priming pumps, but the long-axis submerged pumps are inconvenient to maintain, and the sliding bearings are easy to corrode and wear, and the failure rate is high

The electrical control part of the electronically controlled diaphragm self-priming pump has a complicated structure, and the electronic control components are easily damaged at high temperatures. If the heat preservation is not done well, it is easy to be partially crystallized and cause control failure. Once the control fails, it will make it difficult to start the pump again after stopping the pump. Conditions requiring frequent start-up

Liquid sulfur and other toxic and harmful media are difficult to fill when transported by ordinary tank-type self-priming pumps, so there is an urgent need for a new type of equipment that is easy to maintain, high in safety, and can frequently start and stop the pump

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