Liquid Turbine Flow Meter for Liquid Nitrogen Production Process

A large-scale liquid nitrogen production plant requires precise monitoring and control of liquid flow rates across multiple stages of the production process to optimize efficiency and reduce energy consumption. Traditional flow meters used in the cooling water circulation system and intermediate media (such as liquid oxygen or liquefied natural gas) monitoring have proven to be insufficient in accuracy and slow in response, leading to energy waste and reduced production efficiency.

Core Challenges:

• Achieving high-precision flow measurement (accuracy requirement ≤ ±0.5%) in a complex industrial environment.

• Adapting to various media involved in the liquid nitrogen production process, such as cooling water and liquid oxygen.

• Rapid response to flow rate changes for real-time monitoring and automated control.

• Ensuring long-term stability and low maintenance costs for the flow meters.

Solution

The plant adopted the Sure Instrument LWGY Series Liquid Turbine Flow Meter to precisely monitor the flow rates of cooling water and intermediate media in the liquid nitrogen production process.

High Precision and Fast Response:

• The LWGY Series flow meters are equipped with high-precision sensors that can quickly respond to changes in flow rate, making them suitable for real-time monitoring.

• The flow meters achieve a measurement accuracy of ±0.5%, meeting the high-precision requirements for flow control in liquid nitrogen production.

Multi-Media Compatibility:

• The flow meters are compatible with various liquid media, including cooling water, light oil, and pure liquids, fulfilling the flow monitoring needs across different stages of the production process.

• Available in a wide range of sizes (DN4 to DN300) to fit different piping systems.

Industrial Environment Adaptability:

• Designed with an IP65 protection rating, the flow meters can withstand dust and moisture in industrial environments.

• Multiple connection options (such as flanges, threads, and clamps) facilitate easy installation and maintenance.

Implementation Results

After implementing the Sure Instrument LWGY Series Liquid Turbine Flow Meter, the liquid nitrogen production plant achieved significant improvements:

• Measurement Accuracy: The flow meter accuracy improved from ±2.1% to ±0.3%, greatly enhancing the precision of flow monitoring.

• Cooling Water Consumption: The monthly cooling water loss decreased from 1,200 cubic meters to 150 cubic meters, significantly reducing water waste.

• Process Stability: The temperature stability of the production process improved from ±1.5°C to ±0.2°C, ensuring efficient and stable liquid nitrogen production.

• Maintenance Costs: Annual maintenance costs for the flow meters dropped from $80,000 to $6,500, reducing maintenance burden and costs.

• Production Efficiency: With precise flow control, liquid nitrogen production efficiency increased by 15%, resulting in annual cost savings of $1.8 million.

• Safety: The flow meters achieved zero leakage throughout their lifecycle, effectively safeguarding the integrity of the production environment.

Product Specifications

• Media Compatibility: Suitable for various liquids, including cooling water, light oil, and pure liquids, meeting the flow monitoring needs for different media in liquid nitrogen production.

• Temperature Range: Operating temperature range of -40°C to +150°C, adaptable to various conditions in the liquid nitrogen production process.

• Size Range: Available in sizes from DN4 to DN300 to fit different piping systems.

• Accuracy Class: Measurement accuracy of ±0.5% reading, with an optional high-precision version of ±0.3% for high-precision flow measurement.

• Protection Rating: IP65 protection rating, suitable for dusty and humid industrial environments.

• Certifications: Compliant with multiple international standards, including IEC, PED, SIL, and RoHS Chemical Testing, ensuring product quality and safety.

Client Feedback

"The Sure Instrument LWGY Series Turbine Flow Meter has performed exceptionally well in monitoring the flow rates of cooling water and intermediate media in our liquid nitrogen production process. Its high precision and stability have provided a reliable safeguard for our production operations."

— Equipment Manager, Liquid Nitrogen Production Plant

Case Summary

This case demonstrates the application of the Sure Instrument LWGY Series Liquid Turbine Flow Meter in the liquid nitrogen production process. By leveraging its high precision and fast response capabilities, the flow meter has effectively addressed the challenges of monitoring flow rates for cooling water and intermediate media, improving production efficiency and reducing energy consumption. This technology can also be extended to flow monitoring in other industrial processes, offering a reliable solution for related industries.