HK-6035 Cetane Number Analyzer (Constant-Volume Combustion Method)

Overview

The HK-6035 Cetane Number Analyzer (Constant-Volume Combustion Method) complies with the requirements of the NB/SH/T 6035 test method. It is applicable to conventional diesel fuel, diesel fuel with cetane number improvers added, as well as unconventional fuels such as biodiesel and blended fuels containing biodiesel and diesel blending components. It is suitable for the determination of the cetane number of automotive diesel fuel specified in GB 19147.

Adopting the constant-volume combustion chamber method, the analyzer directly injects fuel into heated compressed air. The dynamic pressure wave generated by sample combustion is used to convert the ignition delay period and combustion delay period determined from the dynamic pressure curve into the Derived Cetane Number (DCN) via a formula—making it a fully automatic instrument. Equipped with a professionally designed air-assisted modern high-pressure common rail fuel injection system, the analyzer enables fast, low-noise, and cost-effective determination of diesel fuel ignition performance, as well as accurate analysis of the derived cetane number of diesel and biodiesel blends. Its excellent precision and stability allow refineries to operate closer to the specified limit values of cetane number during production. Furthermore, studies on the correlation with cetane number improvers have proven that the analyzer effectively reduces refineries’ production costs by optimizing the dosage of additives. The analyzer is suitable for cetane number testing of fuels in laboratories at any altitude; with auxiliary devices, it can also be used for on-line monitoring in field operations, production units, and storage-transportation blending systems.

Functional features

1. Adopting modern high-pressure common rail injection system, electronically controlling high-pressure fuel injection with high precision and good stability.

2. The precision (r and R) is better than other cetane number analyzing methods.

3. Simple and easy operation, high degree of automation and networkization.

4. Low noise, safety, stability and reliability

5. The amount of a single sample <150ml, analysis time: <30 minutes

6. Sample analysis does not need to analyze the standard sample each time, the amount of standard sample analysis <150ml, standard sample calibration cycle > 1 month

7. Instrument combustion chamber, the sensor will not accumulate carbon, dismantle the maintenance cycle> 1 year

8. The detection process does not require manual adjustment, human error is small

9. The instrument needs to have data storage function, real-time recording of sample analysis results; the number of results saved up to 1,000 +, the later can be queried at

any time in the past analysis data

10. The instrument has automatic diagnostic function and comes with alarm/protection function.

11. Instruments used in the gas source, coolant, etc. can be easily purchased and stable quality

12. The cooling system needs to adopt the internal circulation cooling mode, the coolant flow control is automatically adjusted by the instrument, without human operation

, to reduce human influence

13. The equipment complies with the health, safety and environment (HSE) regulations of Sinopec.

Technical parameters

1. Test range: 15 DCN ~ 100 DCN

2. Combustion chamber volume: (0.473±0.005)L

3. Static pressure of combustion chamber: (2±0.02)MPa

4. Wall temperature of the combustion chamber: 560℃～640

5. Injector cooling jacket temperature: (50±2)°C

6. Injection pressure: (100±1.5)MPa

7. Injection time: 2000μs～2700μs

8. Test principle: fixed capacity combustion chamber and electronic control of high-pressure injector

9. Precision: r=0.67 R=1.57 @55CN

10. User interface: Windows system touch screen

11. Injector: modern high-pressure common rail injector

12. Add sample: automatic / manual addition (optional)

13. Sample volume: 60 to 160 ml (depending on the number of tests) and another 100 ml for cleaning for the next sample

14. Time: test duration: about 30 minutes; warm-up time: about 40 minutes

15. Device protection: combustion chamber, fuel injection system overpressure protection; cooling system flow detection; automatic diagnostic function; heater overload

protection; built-in fire extinguishing system, etc.

16. Software function: automatic calibration, diagnosis, storage of test parameters and data

17. Computer interface, function: 6 serial ports (up to support 2 × RS485, 1 × USB3.0, 3 × USB2.0, 1 × HDMI, 1 × VGA); support for WIFI and Ethernet connectivity network

18. Combustion gas supply: compressed synthetic air: the volume fraction of oxygen is required to be 20.0% ± 0.5%, the volume fraction ratio of hydrocarbons is less than

0.003%, and the volume fraction ratio of water is less than 0.025%.

19. Nitrogen: compressed nitrogen: 99.99% purity

20. External cooling system: high and low temperature constant temperature bath

21. Power supply connection: 220V, power 2000W

22. Operation requirements: temperature 15 ℃ ~ 35 ℃; relative humidity of up to 80%

23. External dimensions: (830 × 736 × 710) mm

24. Weight: about 120kg