The fire-resistant oil is composed of phosphate ester, which is transparent and uniform in appearance. The new oil is slightly light yellow or orange in color, without sediment, low volatility, good abrasion resistance, good stability, and stable in physical properties. The fire-resistant oil used in the electro-hydraulic control system of the power plant is a kind of fire-resistant pure phosphate liquid. The fire-resistant property is one of the most prominent characteristics of phosphate ester, which can also burn at extremely high temperatures, but it does not spread flame, or can quickly extinguish itself after fire, Phosphate ester has high thermal oxidation stability.
Spontaneous ignition point: the lowest temperature (unit: ℃) at which oil spontaneously ignites without flame contact under specified conditions.
DL/T571-2014 Guide for Operation and Maintenance of Phosphate Ester Fire-resistant Oil for Power Plants adopts the test method of DL/T706, which requires that the self-ignition point should be greater than or equal to 530 ℃. The self-ignition point of fire-resistant oil is higher than that of steam turbine oil. Generally, the self-ignition point of steam turbine oil is only about 300 ℃.
The self-ignition point of fire-resistant oil is higher than that of ordinary mineral oil. The high self-ignition point is an aspect of fire resistance of fire-resistant oil, so the self-ignition point of fire-resistant oil is a major indicator to ensure the safe operation of the unit. If the self-ignition point decreases during operation, it indicates that the fire-resistant oil is contaminated by mineral oil or other flammable liquid, and the cause should be found out quickly.
SH706B automatic self-ignition point tester is designed and manufactured according to the requirements of the electric power industry standard DL/T 706-2017 of the People's Republic of China. The instrument adopts advanced microcomputer technology and color display with touch screen, and adopts advanced temperature control mode to automatically complete the determination of the self-ignition point of fire-resistant oil. It has the functions of automatic constant temperature timing after reaching the preset self-ignition point, automatic sample injection, automatic detection of self-ignition point, and automatic printing of results.