A throttling device suitable for slurry pipeline

Abstract

The invention provides a throttling device suitable for a slurry pipeline. The throttling device suitable for the slurry pipeline includes a discharge pipe; a buffer structure, the buffer structure includes a buffer pipe and a rotating shaft; a valve structure, the valve structure includes a water inlet pipe, a gear, a drain hole, an outer ball valve, a communication port, Inner ball valve, connecting pipe, water outlet pipe, water blocking block, water discharge pipe and one-way valve; limit structure, the limit structure includes a protection box, a limit groove, a rotating column, a handle, a limit frame, and a first spring , baffles and indicators; telescopic structure. The throttling device suitable for slurry pipelines provided by the invention has the advantages of reducing cavitation, reducing pressure and diverting flow and cleaning pipelines.

Description

technical field [0001] The invention relates to the technical field of PTA refining, in particular to a throttling device suitable for slurry pipelines. Background technique [0002] Cavitation refers to the phenomenon that cave-like corrosion damage occurs on the metal surface in contact with the fluid under the condition of high-speed flow and pressure change. It often occurs in the high-speed decompression area such as the tip of the centrifugal pump blade, where a cavity is formed. The cavity is crushed in the high-pressure area and generates impact pressure, destroying the protective film on the metal surface and accelerating the corrosion rate. Cavitation is characterized by the formation of many small pits on the metal surface, and then gradually expands into caves. [0003] During the PTA production process, the pasty slurry needs to be discharged to the next production link. The temperature of this slurry is high, the pressure is high, and it is accompanied by high...

AI Technical Summary

Problems solved by technology

[0003] During the PTA production process, the pasty slurry needs to be discharged to the next production link. The temperature of this slurry is high, the pressure is high, and it is accompanied by high-temperature steam. The pipeline through which the discharge flows needs to be controlled by a ball valve. Therefore, the pressure difference between the front and rear of the ball valve Higher, easy to produce cavitation in the valve, under the aggravation of slurry erosion, the service life of the control valve is poor, which will eventually affect the stable operation of the PTA device. At the same time, the slurry will also impact the downstream pipe wall of the ball valve and damage the pipeline. causing a pipe leak

The traditional method is to use the form of noise reduction orifice plate to reduce the noise, but this method is limited to the clean working medium and is not suitable for the slurry working condition. The unclean medium is easy to block the pipeline, which will have a greater impact on the production and operation , and this method also has the disadvantages of inconvenient parts replacement and high maintenance cost

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