KA-800 Industrial Sulfur Determination Analyzer
| Brand | KARRIE (Lianhe Jiali) |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | KA-800 |
| Heating Power | 1800 W |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Nitrogen Flowmeter Range | 150 mL/min |
| Temperature Control Accuracy | ±1 °C |
| Heating Medium | Transparent Glycerol |
Overview
The KA-800 Industrial Sulfur Determination Analyzer is a dedicated thermal decomposition–combustion system engineered for quantitative sulfur analysis in liquid industrial sulfur products derived from refinery off-gas, natural gas processing units, and Claus plant condensates. It operates in strict accordance with the measurement principle specified in GB/T 2449.2–2015 *Industrial Sulfur—Part 2: Liquid Products*, which defines the gravimetric determination of total sulfur content via controlled pyrolysis under inert nitrogen atmosphere followed by oxidation and sulfate precipitation. The instrument utilizes glycerol as a uniform, thermally stable heating medium to ensure precise temperature ramping and isothermal holding across the critical decomposition range (typically 300–400 °C), minimizing thermal gradients and ensuring reproducible volatilization kinetics of elemental sulfur and organic sulfides.
Key Features
- Microcontroller-based PID temperature control architecture delivering ±1 °C stability over extended isothermal periods—fully compliant with GB/T 2449.2–2015 thermal protocol requirements.
- Front-mounted borosilicate glass observation window enabling real-time visual monitoring of sample liquefaction, bubbling behavior, and residue formation during thermal treatment.
- Adjustable back-pressure regulation system permitting fine-tuned control of system pressure during nitrogen purging—critical for suppressing sulfur vapor recondensation and ensuring complete transfer of volatile species to the absorption train.
- Calibrated digital nitrogen flowmeter (0–200 mL/min range, factory-set at 150 mL/min per standard method) with needle-valve adjustment for stable, laminar carrier gas delivery throughout analysis.
- Integrated programmable timer (0–999 min) supporting unattended operation and precise adherence to prescribed hold times at target temperature.
- Modular plug-in electrical control panel design facilitating rapid component-level diagnostics, fuse replacement, and sensor recalibration without full disassembly.
Sample Compatibility & Compliance
The KA-800 is validated for use with liquid industrial sulfur conforming to GB/T 2449.1–2014 specifications (Grade I, II, or III), including molten sulfur samples collected directly from storage tanks, transport vessels, or process lines. It accommodates sample masses between 1.0 g and 5.0 g in standardized quartz crucibles. All wet chemistry downstream components—including absorption flasks, sulfate precipitation reagents (BaCl₂ solution), and filtration apparatus—are compatible with standard laboratory glassware and follow classical gravimetric procedures outlined in the national standard. While the analyzer itself does not generate electronic records, its operational parameters (temperature setpoint, hold time, flow rate) are manually logged in accordance with GLP-compliant laboratory notebooks; optional analog chart recorder integration supports traceable analog documentation for internal QA audits.
Software & Data Management
The KA-800 operates as a standalone benchtop instrument with no embedded software or digital data output interface. Temperature setpoints, timer activation, and flow adjustments are performed via front-panel rotary encoders and tactile push buttons. All analytical data—including initial mass, final precipitate mass, blank correction values, and calculated %S—are recorded manually in laboratory worksheets or LIMS-integrated spreadsheets. For laboratories requiring electronic audit trails, external USB-connected temperature dataloggers (e.g., Omega OM-DAQPRO-5300) may be mounted on the glycerol bath to capture continuous thermal profiles, satisfying basic FDA 21 CFR Part 11 alignment when paired with controlled document management systems.
Applications
- Quality control testing of liquid sulfur shipments prior to solidification or pelletizing.
- In-process verification of sulfur purity in Claus unit tail gas treatment facilities.
- Technical service support for refineries evaluating sulfur recovery efficiency across multiple feedstocks.
- Educational laboratories conducting ASTM D129–16 or ISO 8742–1992 comparative studies (with minor procedural adaptation).
- Contract testing laboratories performing certified reference material validation per CNAS-CL01 requirements.
FAQ
Does the KA-800 comply with international standards such as ASTM or ISO?
It is designed specifically for GB/T 2449.2–2015 compliance; however, its thermal decomposition methodology aligns conceptually with ASTM D129–16 (Standard Test Method for Sulfur in Petroleum Products) and ISO 8742:1992 (Petroleum products — Determination of sulfur — Bomb calorimetric method), though direct equivalency requires method validation per ISO/IEC 17025.
Can the instrument be used for solid sulfur samples?
No—it is configured exclusively for liquid-phase analysis as defined in GB/T 2449.2. Solid sulfur must first be melted under controlled conditions and introduced as a homogeneous liquid phase to avoid sampling bias.
Is glycerol replacement required after each test?
Glycerol is reused across multiple analyses; however, it must be filtered and inspected for discoloration or carbonaceous residue before reuse. Recommended replacement interval is every 50 runs or when thermal clarity degrades beyond ASTM D129 visual clarity thresholds.
What safety certifications does the unit carry?
The analyzer conforms to GB 4793.1–2019 (Safety requirements for electrical equipment for measurement, control, and laboratory use) and includes dual thermal cutoffs, ground-fault circuit interruption, and glycerol overflow containment—all verified during factory acceptance testing.
