Automatic oxygen bomb calorimeter isMeasure the heat generation of solid and liquid combustiblesThe core instruments are widely used in fields such as coal, electricity, metallurgy, chemical engineering, and scientific research. Its core purpose is to accurately measure the calorific value of coal, coke, oil products, biomass fuels and other substances, providing key data for fuel quality assessment, boiler thermal efficiency calculation, and energy consumption accounting; In scientific research, it can also be used to study thermodynamic parameters such as combustion heat and reaction heat of organic compounds, supporting chemical process optimization and new material development. This device greatly improves testing efficiency and data accuracy compared to manual calorimeters by automatically controlling oxygenation, ignition, temperature measurement, and calculation processes, reducing human operational errors.The standard operating steps for an automatic oxygen bomb calorimeter are as follows:
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sample preparation
According to the type of sample to be tested, solid samples (such as coal) need to be ground to a particle size of less than 0.2mm, dried to a constant weight, and accurately weighed with an analytical balance to a weight of 0.9-1.1g (accurate to 0.0001g); Liquid samples should be sealed in capsules or ampoules to avoid evaporation. Place the sample in a combustion dish, connect the ignition wire, and ensure that the ignition wire is in good contact with the sample and does not touch the combustion dish wall. -
Oxygen bomb assembly and oxygenation
Place the combustion dish containing the sample into an oxygen bomb, add 10mL of distilled water (used to absorb acidic gases generated during combustion and reduce corrosion), and tighten the oxygen bomb cover. Connect the oxygen bomb to the oxygenation device, first fill a small amount of oxygen (about 0.5MPa) to replace the air inside the bomb, then increase the pressure to 2.8-3.0MPa, stabilize for 15-20 seconds, and then close the oxygenation valve to ensure that the oxygen bomb is sealed without leakage. -
system installation
Add a certain amount of distilled water to the inner cylinder of the calorimeter, place the oxygenated oxygen bomb into the inner cylinder, connect the ignition electrode, cover the outer cylinder insulation cover, and ensure that all interfaces of the instrument are sealed. -
automatic testing
Start the instrument control system, set parameters such as sample quality and specific heat capacity, and the instrument will automatically complete the processes of inner cylinder water temperature balance, ignition, temperature acquisition, cooling calibration, etc. After ignition, the sample is fully burned in a pure oxygen environment, and the released heat is transferred to the inner cylinder water. The instrument records temperature changes through high-precision temperature sensors. -
Data Processing and Closing
After the test is completed, the instrument automatically calculates and displays the heat generation of the sample's cylinder. The operator converts the high and low heat generation based on indicators such as total sulfur and moisture content of the sample. Then remove the oxygen bomb, slowly release the remaining gas inside the bomb, open the oxygen bomb cover, and check if the sample is completely burned. If there is residual carbon, retest; Finally, clean the oxygen bomb and combustion dish, wipe dry and set aside for later use.
PrecautionsDuring oxygenation, the pressure must not exceed 3.0MPa to prevent the explosion of oxygen bombs; After the test is completed, it is necessary to release the gas before opening the cover to avoid injury caused by high-temperature gas spraying out; Regularly calibrate the thermal capacity of the instrument to ensure the accuracy of the test results.