(1) Industrial analysis of oil sludge
The industrial analysis method of oil sludge adopts the industrial analysis method of GB/T 212-2008 coal. Since the water content has been obtained by distillation, the ash content, volatile matter content and fixed carbon content of the sample are determined only by this method.
Ash calculation formula for oil sludge:
Aad = (m2-m0)/m1 x 100%……………………………….. ……………..Formula (2-4)
Where: Aad… mass fraction of air-dried ash, the value is expressed in %;
Mo…the mass of the constant weight ash dish, in g;
M1 … sample quality, the unit is g;
M2… The quality of the ash dish and the sample after burning, in g.
Volatile formula of oil sludge:
Vad = (m1+-m0-m2)/m1 x 100% – w1……………………………. …….Formula(2-5)
Where: Vad… volatile matter of oil sludge, the value is expressed in %;
Mo…the mass of the constant weight (including the lid) in g;
M1 … sample quality, the unit is g;
M2…heated crucible (including lid) and sample mass in g;
W1… moisture content of oil sludge, the value is expressed in %.
Fixed carbon calculation formula for oil sludge:
FCad = 100 – w1 – Aad – Vad ………………………………….. ………………Form (2-6)
Where: FCad… fixed carbon of oil sludge, the value is expressed in %;
W1 ……. moisture content of oil sludge, the value is expressed in %;
Aad …, the ash content of oil sludge, the value is expressed in %;
Vad… Volatile matter of oil sludge, the value is expressed in %.
(2) Analysis of oil sludge elements
The organic element analysis of oil sludge is tested and analyzed by organic element test analyzer.
Analysis of C, H, N, S elements.
(3) Analysis of calorific value of oil sludge
In this analysis, the calorific value of GB213-2008 coal was used to determine the calorific value of oil sludge.
The experimental instrument adopts a fully automatic calorimeter. The specific measurement steps are as follows:
Mixing uniformly mixed oil sludge from 0.9000g to 1.1000g (accurate to 0.0002g) and placing it in constant mass.
In the combustion vessel, two ends of a known mass of the ignition wire are respectively attached to the electrode column, and a cotton wire of a known heat value is attached to the wire. The other end of the cotton thread is in contact with the sludge sample, and 10 ml of deionized water is injected into the oxygen bomb, and the oxygen bomb cover is tightened; then the oxygen bomb is slowly filled with oxygen by an automatic oxygenator to a pressure of about 3.0 MPa for 10 s. Put the oxygen bomb into the instrument, input the relevant parameters on the computer screen, click the measurement button, the system will automatically run and automatically analyze the data. After the test, record the high heat on the screen, and each sample will be made into multiple parallel samples. When the difference between the two measurements does not exceed 200 J, the average value is recorded as the calorific value of the sample.
