Microcomputer Fully Automatic Quantitative Isothermal Calorimeter

Scope of Application:

Suitable for measuring the calorific value of solid or liquid combustibles such as coal, petroleum, biomass fuel, waste fuel, cement raw meal, grain, feed, etc., in industries or sectors including electric power, coal, metallurgy, petrochemicals, coal chemicals, cement, papermaking, geological exploration, agriculture and animal husbandry, pharmaceutical research, and teaching.

Compliant Standards:

GB/T213-2008 "Method for Determination of Calorific Value of Coal"

GB/T384-1981 "Method for Determination of Calorific Value of Petroleum Products"

GB/T30727-2014 "Method for Determination of Calorific Value of Solid Biomass Fuels"

JC/T1005-2006 "Method for Determination of Calorific Value of Cement Raw Meal"

ASTM D5865-2007 "Standard Test Method for Gross Calorific Value of Coal and Coke"

ISO 1928-2009 "Solid Mineral Fuels - Determination of Gross Calorific Value by the Bomb Calorimetric Method and Calculation of Net Calorific Value" requirements.

Performance Features:

1. Flexible Placement: The instrument consists of a main controller and a temperature controller, both of which can be placed flat on the experimental bench or the temperature controller can be placed below the bench;

2. Stable Water Volume: The instrument uses a stable and reliable measuring cup for quantification, ensuring long-term stability of water volume;

3. Simplified Water Circuit: The instrument uses three pumps and three valves, significantly simplifying the water circuit compared to traditional instruments, ensuring reliability and easy maintenance of components;

4. Constant Water Temperature: Equipped with a chiller controller, it can display the water tank temperature in real-time and adjust it;

5. Water Filtration: An additional filter is installed in the inner cylinder to prevent impurities (such as ignition wires) from damaging the water pumps and valves;

6. Visible Water Level: Facilitates monitoring the water filling progress and timely replenishment of water after long-term experiments;

7. Lockable Lid: Ensures safe and reliable experiments, with a tightly sealed lid to prevent external airflow from affecting the upper part of the inner cylinder;

8. Multiple Testing Modes: The instrument supports both conventional and fast testing modes to meet the needs of different customer groups;

9. Stable Inner Cylinder Environment: Water filling through the lid, large water volume in the outer cylinder, and no residual water in the inner cylinder drainage pipeline ensure a stable and reliable experimental environment around the inner cylinder;

10. Special Experimental Process: Determines the temperature difference range between inner and outer cylinders before ignition, cleans the inner cylinder and oxygen bomb after experiments to ensure environmental stability and consistency, and promptly removes residual heat after experiments to avoid affecting subsequent tests;

11. Conventional Method: Based on the classical Regnault-Pfaundler formula and combined with the instrument's experimental process and structure, a simplified classic experimental method—the conventional method—has been developed. Extensive experiments have proven that the conventional method is equivalent to the original classic method. This method can withstand environmental temperature fluctuations of about 5°C;

12. Fast Method: Proposed based on the reversibility of heat capacity and calorific value processes, the fast method has an experimental cycle of 10–12 minutes and can withstand environmental temperature fluctuations of about 4°C.

Technical Parameters:

1. Temperature Resolution: 0.0001K (original imported temperature sensor)

2. Testing Cycle: ≤15 minutes (conventional method), ≤10 minutes (fast method)

3. Constant Temperature Accuracy of Outer Cylinder Water for a Single Experiment: 0.08°C

4. Long-Term Constant Temperature Accuracy of System Water: 1°C

5. Sample Weight: Determined based on the calorific value range; coal samples commonly use 1g

6. Precision: RSD ≤ 0.1%

7. Accuracy: Test results fall within the allowable range of standard samples

8. Calorific Value Range: 15,000 J/g ~ 35,000 J/g (3,500 Cal/g ~ 85,000 Cal/g)

9. Heat Capacity Fluctuation: ≤0.2% within one year

10. Power Supply: 220V ± 30V, 50Hz/60Hz

11. Dimensions: Main Controller (L×W×H): 540mm × 530mm × 600mm

Temperature Controller (L×W×H): 270mm × 530mm × 500mm

12. Weight: Main Controller 40kg, Temperature Controller 35kg

13. Power Consumption: Computer <300W, Calorimeter Main Unit <200W