Fully automatic benzene crystallization point analyzer

Instrument Overview:

The automatic benzene crystallization point analyzer complies with GB/T 3145 benzene crystallization point determination, GB/T 3069.2 naphthalene crystallization point determination, GB/T 3710 industrial phenol, benzene fen crystallization point determination, GB/T 7533 organic chemical product crystallization point determination, GB/T 618 chemical reagent crystallization point determination, GB/T 1663 plasticizer crystallization point determination, and GB/T 13255.2 industrial caprolactam test method. Determination of crystallization point. The instrument adopts PLC industrial touch screen, HMI human-machine interface, configuration network, and remote control by mobile phone or computer. The instrument is easy to operate, just place the sample, and the instrument will automatically start detecting, displaying, and storing the test results. It can also be printed or exported using a USB drive. Obtain two countries.

BSY-182AFully automatic benzene crystallization point analyzerCharacteristics:

1. Industrial grade ARM32-bit chip core processor, automatically completes the testing process. The data can be exported through a USB flash drive and processed by a computer to achieve paperless detection.

2. Adopting industrial grade PLC controller and treated with three proof paint, the instrument is worry free. 7-inch true color touch screen, can complete the experiment according to the screen prompts without training.

3. Windows CE embedded operating system, with a fully Chinese interface, allows for easy switching of pages, simple and convenient operation, automatic printing of results, and the ability to store tens of thousands of data and curves.

4. Automatic diagnosis, over temperature alarm, automatic cut-off of heater power supply, and alarm prompt function upon completion of the test.

5. RS485 connection standard, compatible with USB 2.0 interface. Compatible with LIMS system, supports online monitoring and downloading, making it more convenient to use.

The fully automatic benzene crystallization point analyzer is a "ruler" level instrument used for precise evaluation of product purity in the aromatic hydrocarbon industry quality control. It transforms a classic physical constant determination method that is cumbersome to operate, highly dependent on experience, and prone to controversial results into a modern intelligent testing that is fast, objective, accurate, and traceable. Its core value lies in automatically capturing and determining the tiny temperature plateau during crystal phase transition through high-precision temperature measurement and intelligent algorithms, thereby providing crystallization point data.

The instrument strictly follows the physical principles of classical methods, but achieves automation and objectivity throughout the entire testing process. Its core is to monitor the temperature changes during the phase transition process (temperature time curve).

Basic physical process: Pure substances release latent heat of solidification during crystallization, which maintains a constant temperature during the crystallization process (i.e., a "temperature plateau period"), until the temperature continues to decrease after complete solidification. The presence of impurities can disrupt this platform and cause a decrease in the crystallization point.

The workflow of fully automatic instruments:

Automatic injection and pre cooling: The instrument automatically or assisted in inhaling an appropriate amount of ultra dry sample (benzene is highly hygroscopic and must be strictly moisture-proof), and starts the refrigeration system to cool the sample at a standard rate (such as 0.3-0.8 ° C/min) at a constant speed.

Precision temperature monitoring: The high-precision platinum resistance temperature sensor (Pt100, with an accuracy of ± 0.01 ° C) continuously and rapidly collects temperature data of the sample.

Induced crystallization and monitoring:

When the sample temperature approaches the expected crystallization point (such as 5-6 ° C), the instrument will automatically perform slight perturbations (or insert a seed rod) through the built-in mechanical vibrator or stirrer to induce crystallization to begin.

Once crystallization begins, the solidification heat released by the sample will cause the temperature to rise.

Intelligent endpoint judgment:

This is the 'brain' of the instrument. Real time analysis of temperature time curve using software.

It automatically recognizes the inflection point of temperature rise during the process of temperature decrease and accurately identifies the highest point reached by temperature rise (i.e. the starting or highest point of the temperature plateau period).

The temperature corresponding to this point is automatically determined as the crystallization point.

Automatic reporting and data processing: After the test is completed, the instrument automatically displays, stores, and prints the results, and can simultaneously record the complete cooling curve for easy review.

Main application areas

Aromatic hydrocarbon production facilities (refineries, petrochemical enterprises): online or offline quality monitoring and factory inspection of products such as pure benzene and toluene.

Coking enterprise: refining and quality control of coking benzene.

Third party quality inspection agencies and commodity inspection bureaus: used for market supervision, trade inspection, and arbitration analysis.

Chemical research institution: used for research on new aromatic hydrocarbon separation technology and high-purity benzene preparation process.

Large scale chemical fiber, rubber, and plastic production enterprises: Conduct incoming quality inspection on raw material benzene.

Core structure composition of the instrument

Constant temperature cold bath system: using semiconductor refrigeration or high-performance compressor refrigeration to provide a stable and linear program cooling environment.

Test tube component: double-layer glass sleeve (such as inner tube for sample placement and outer tube for air bath), in compliance with standard dimensions, and equipped with precision temperature sensors.

Crystallization induction device: an automatic stirrer or vibrator used to trigger crystallization at critical points.

Sample processing unit (key): Due to the extreme sensitivity of benzene crystallization points to moisture, advanced instruments may be equipped with:

Drying tube: Fill the injection path with a desiccant (such as molecular sieve) to ensure that the sample entering the test tube is absolutely dry.

Sealed injection system: prevents the sample from absorbing moisture from the air during the testing process.

High precision temperature measurement system: including Pt100 sensors and high-speed, high-resolution temperature measurement circuits.

Central controller and intelligent software:

Control the cooling rate and induce crystallization timing.

Collect and analyze temperature data in real-time, and use algorithms such as differentiation to automatically determine the crystallization point.

Draw and store temperature time curves, and output the final report.

Fully automatic benzene crystallization point analyzerTechnical Indicators:

1. Power supply: AC220V 50Hz

2. Whole machine power consumption: ≤ 1200 W

3. Bath temperature range: -20 ℃~50 ℃

4. Temperature control accuracy of bath: ± 0.1 ℃

5. Sensor: Ptl00 thermistor

6. Sample temperature range: -10~150 ℃

7. Sample detection accuracy: ± 0.01 ℃

8. Working mode: Two holes, capable of measuring two samples simultaneously

9. Refrigeration method: Compressor refrigeration

10. Sample stirring: Electromagnetic stirring is used, stirring 60 times per minute

11. Environmental temperature: 5-35 ℃

12. Relative humidity: ≤ 85%

13. Dimensions: 550 * 450 * 420

14. Weight: 30kg