SLDF2085 Ultrasonic Flow Meter: A New Benchmark for Emulsified Medium Measurement-Successful Application in Ethylene Plant's DN600 Oil-Water Mixture Measurement

 

1. Industry pain points: The critical bottleneck in DN600 oil-water mixture measurement

 

In ethylene plant operations, the DN600 oil-water mixture pipeline serves as a critical link between the quench system and separation unit. Its flow measurement accuracy directly impacts oil-water separation efficiency and energy consumption control. However, the complex operating conditions in this scenario have long rendered traditional flow meters ineffective:

Extreme medium characteristics: The oil-water mixture is dynamically emulsified, with the oil phase proportion fluctuating between 15% and 60%, and containing trace coke powder particles (particle size ≤0.5mm). The traditional time-difference flowmeter is prone to signal distortion due to acoustic velocity interference, resulting in measurement deviations exceeding ±5%.

Frequent fluctuations in working conditions: medium temperature 45-95℃, pressure 0.3-0.5MPaG, flow rate in the range of 800-2200m³/h fluctuates violently, conventional flowmeter is difficult to adapt to the requirements of wide range and high precision;

Installation and maintenance challenges: Invasive flow meters require cutting DN600 large-diameter pipelines, resulting in over 72-hour shutdowns for retrofitting and significant economic losses. External-mounted flow meters (e.g., models) are prone to pipeline scaling and uneven wall thickness, with an average of 2 monthly failures. Maintenance procedures involving oil discharge and sewage release not only pollute the environment but also pose safety hazards.

Explosion-proof requirements are strict: the pipeline is located in the dangerous environment of zone 20, which puts forward high requirements for the explosion-proof grade and protective performance of the flowmeter, and ordinary equipment is difficult to meet the standards.

These problems cause the liquid level of the device separation tower to fluctuate ±150mm, and the dosage of the agent to waste 10%-15%, which has become the core bottleneck restricting the cost reduction and efficiency increase of petrochemical enterprises.

 

2. Breakthrough Strategy: Targeted Technological Innovation of SLDF2085

 

To address the measurement challenges of DN600 oil-water mixtures, the SLDF2085 Ultrasonic flowmeter delivers a comprehensive solution through scenario-based customization.

(1) Core technology highlights

Emulsion medium-specific algorithm: Based on SLDF2085 bidirectional time difference technology, a dynamic model of "oil phase ratio-sound velocity compensation" is established to automatically adapt to the fluctuation of 15%-60% oil phase ratio, and the measurement accuracy is stable within ±1%F.S, solving the problem of signal distortion of emulsified medium;

Broadband anti-interference design: 0.3-1.8MHz Full-band frequency scanning, intelligent identification of noise and pipeline scaling interference from powder particles, signal-to-noise ratio increased to more than 30dB, stable measurement in the range of low flow rate 0.3m/s and high flow rate 10m/s;

Advantages of non-invasive installation: The clamp-on design eliminates the need to damage DN600 pipeline structures. It reduces installation requirements for straight pipe sections of ≥15D upstream and ≥8D downstream, shortening the construction period to 2 hours. The system can be deployed during temporary maintenance, avoiding downtime losses.

Advanced safety protection: The Exia II CT4 features an explosion-proof rating with IP67 protection, capable of withstanding temperatures from 45°C to 95°C and 0.3-0.5MPaG pressure. It is fully compatible with Zone 20 hazardous environments, and its mechanical-free design extends the equipment's lifespan to over 10 years.

(2) DN600 scenario-specific configuration

Sensor Selection: A high-temperature dual-sensor configuration (Model: CP20JB-1MHz-H) with 1MHz frequency, compatible with DN600 carbon steel pipes (wall thickness 14.2mm) operating in-20 to 210°C. Redundant configuration ensures signal stability.

Coupling agent compatibility: A high-temperature resistant solid coupling agent (tolerant to ≤150℃) is used to ensure a tight fit between the sensor and the pipeline at 95℃, with no signal attenuation during transmission.

System Interconnection Capability: Supports 4-20mA current output and HART/Modbus protocols, enabling seamless integration with mainstream DCS systems like Siemens and Yokogawa. With data transmission latency ≤0.8s, it meets real-time control requirements.

 

3. Successful Practice: Application Case of ethylene Plant No.3 in a Petrochemical Plant

 

(1) Application Overview

Application scenario: A DN600 oil-water mixture pipeline for the No.3 ethylene unit of a petrochemical plant (15m from the oil-water separation tower outlet).

Trial period: August 15,2025 to November 14,2025 (3 months);

Replacement object: external Ultrasonic flowmeter, traditional orifice plate flowmeter.

(2) Key application results

Breakthrough in measurement accuracy: Under operating conditions with oil phase ratios of 18%-58% and coke powder impurities, the SLDF2085 maintains a stable measurement deviation of ±0.8%, achieving 84% accuracy improvement over traditional equipment (±5%). The separation tower level fluctuation is controlled within ±50mm, and the optimized chemical dosage saves 12%.

The operation stability is significantly improved: the sensor signal strength remains 850-920 (full range 1000) for 3 consecutive months without failure, compared with the original flowmeter's average monthly failure performance of 2 times, and the equipment availability is improved from 85% to 100%;

Remarkable results in cost reduction and efficiency improvement: non-invasive installation reduces downtime loss by more than 1.2 million yuan, the design without mechanical parts reduces the annual maintenance cost by more than 30%, and the equipment life reaches 10 years, 25%-40% longer than the traditional flowmeter (life 6-8 years);

Full compliance with operational conditions: The system demonstrates rapid and stable data response across temperature ranges of 46-92°C and flow rates of 980-2150 m³/h, fully meeting the measurement requirements for large-diameter DN600 pipelines with wide measurement ranges.

 

4. Core Advantages: SLDF2085 Compared with Traditional Flow Meters

 

Dimensional comparison	SLDF2085 Ultrasonic Flow Meter	Traditional flowmeter (orifice plate/turbine)
certainty of measurement	±1%F.S. Inside (emulsified medium)	±3%-±5%F.S. (Deviation increases when oil phase proportion exceeds 30%)
Condition adaptation	Operating at 45-95℃ with a flow rate of 800-2200m³/h, the oil phase proportion ranges from 15% to 60%.	Failure occurs when the temperature ≤80℃, the ratio of measurement range ≤1:20, or the oil phase proportion exceeds 40%
way to install	Non-invasive clamp-in installation, takes 2 hours to install, no downtime required	Invasive or external patch method, requires 72+ hours of construction and temporary work stoppage for renovation
Maintenance cost	No mechanical parts, low annual maintenance cost	The average monthly failure rate is ≥2 times, requiring costly maintenance and drainage.
capacity of resisting disturbance	Frequency conversion algorithm with interference detection, compatible with mixed emulsion media	Susceptible to coking, emulsification, and turbulence interference, and signal attenuation

 

5. Promotion value: Full-scenario adaptation and expansion

 

The successful deployment of SLDF2085 in a DN600 oil-water mixture pipeline at a petrochemical facility has validated its reliability under complex operating conditions, with potential for expansion to other petrochemical applications.

Applicable medium: residual oil, heavy oil, particle-containing sewage, chemical emulsion and other dirty liquid;

Application scenarios: catalytic unit slurry pipelines, refinery crude oil pipelines, and chemical oily wastewater treatment pipelines (DN300-DN1000).

Core value: Help enterprises to achieve accurate measurement, energy saving and consumption reduction, while meeting the requirements of environmental protection compliance and safe production, and provide reliable data support for industrial intelligent upgrading.

 

6. Cooperative consultation: customized traffic measurement services

 

The SLDF2085 Ultrasonic flowmeter has been rigorously validated by industry leaders including CNPC and Sinopec, with over 500 successful implementations. We provide end-to-end solutions covering equipment evaluation, product selection, on-site installation, commissioning, and post-sales maintenance, ensuring swift deployment and reliable operation.

For detailed application reports, operating condition matching tables, or on-site technical consultations for the DN600 petrochemical pipeline, feel free to contact us anytime!

 

- Solve the emulsification medium challenge with precision measurement, and SLDF2085 joins you in building a new efficient production ecosystem for the petrochemical industry!

 

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