Customer background
The client is a large energy holding subsidiary. Focusing on the field of liquefied petroleum gas, it has become the largest integrated operator of imported liquefied petroleum gas in China. It has ranked first in the industry in terms of import and sales of liquefied petroleum gas in China for four consecutive years, and its LPG trade volume ranks first in the world.
Customer pain points
In September 2018, due to temperature fluctuations of the high-speed bearings of the high-pressure and low-pressure expanders during the start-up, the temperature of the high-speed bearings rose to 116°C, and the unit tripped due to excessive temperature. After that, the oil was replaced, the temperature was controlled between 80-90°C, and after running for about a month, the temperature of the bearing bushes fluctuated and increased many times, which was close to the value of bump.
Device name: Polyethylene device
Unit name: D-91FE
Solve the problem: remove the varnish
Oil details
Tank capacity: 20m³
Oil type: 46# turbine oil
Oil use time: one year
Solution
Oil purifier model: WVD-II varnish removal unit
Oil purifier commissioning time: December 2018 to present
Before purification
Operating conditions of the unit: The temperature of the bearing bushes fluctuates, and the fluctuations intensify after filling about 300 liters of a foreign brand of dissolved oil. After each peak, the temperature drops, and then rises alternately, repeatedly tripping, causing the unit to fail to operate normally.
After purification
Operation status of the unit: less than 24 hours after the equipment was put into use, the phenomenon of temperature fluctuations was alleviated, and the temperature dropped to about 85°C within less than a month of use.
Comprehensive evaluation
In mid-December 2018, our company's varnish removal unit was selected. The equipment was put into use for less than 24 hours, and the phenomenon of temperature fluctuations was alleviated. The temperature dropped to about 85°C in less than a month, and the temperature of the equipment has been stable so far. The operation has been kept at around 80°C, which has solved the major problems of customers. In August 2019, the customer put into use our two sets varnish removal unit again on the other two main units.
Post time: Jun-27-2023