Ningbo Gaopin Technology Co., Ltd

NGPGChemical industry reaction kettle oxygen content detection solution

1. Introduction

As the core equipment in the chemical industry, the precise detection of oxygen content inside the reactor is a key link to ensure safe production and improve process efficiency. Especially in high-risk reactions such as oxidation and hydrogenation, abnormal oxygen concentration may cause explosions, fires, or a decrease in product quality.The environment in the reaction vessel is relatively complex,oftenAccompanied by strong acids, strong alkalis, corrosiveness, and a large amount of water vapor.This plan combines industry standards, technical means, andPreprocessing corresponding to working conditionsPropose a full process solution from detection equipment selection, deployment strategy to data management, aiming to reduce security risks and optimize process control.

2、 Detection target and standard basis

1. Core testing indicators

o Oxygen concentration rangeAccording to the process requirements, it is usually necessary to control within 5% -10% (volume ratio), and special working conditions may require 0.1% -25%.

o response timeKey control points should be ≤ 5 seconds to ensure real-time performance.

o Accuracy and stabilityError ≤ ± 2% FS, long-term drift ≤ ± 3% FS/6h.

2. standard basis

o Domestic standardsAccording to GB/T 12955-2008 "Combustible Gas Detection Alarm", the range of the oxygen detector must cover 150% of the process limit value.

o International StandardIEC 60079-29-2 requires explosion-proof equipment to pass Ex certification and be suitable for high-risk chemical environments.

3、 Selection of Testing Equipment and Technology

Online monitoring system

o Device Selection: RecommendedNGPG gas detector NGP5-O2Oxygen online analyzer, capable of synchronous measurementMeasure oxygen concentration and support 4-20mA/RS485 signal output.

o Technical Features：

§ Adopting industrial technologyElectrochemical sensorHigh sensitivity (0.1% VOL), fast response time (T90 ≤ 30S), but requires regular calibration.

§ Adopting NGPG customized preprocessing system:Can filter strong acids, strong alkalis, corrosive substances, and large amounts of water vapor.

4、 Deployment strategy for detection points

1. critical area

o Top of reaction vesselMonitor the overall oxygen concentration inside the kettle to prevent explosions.

o Near the mixing shaftIdentify local oxygen enrichment caused by uneven mixing.

o Inlet and outletMonitor oxygen fluctuations during the feeding process to prevent overpressure.

2. Deployment principles

o Redundant designKey areas are monitored using dual devices to ensure data reliability.

o Spatial dimension coverageEstablish a three-dimensional concentration field model with a dual probe configuration.

5、 Data processing and warning mechanism

1. data management

o real-time transmissionUpload data to the monitoring platform through IoT technology, supporting WeChat and SMS push of alarm information.

o Historical data analysisIntegrate historical data, predict trends in oxygen concentration, and optimize process parameters.

2. early warning mechanism

o graded warningSet three levels of warning: "high concentration", "low concentration", and "safe" according to the concentration threshold.

o emergency responseWhen the concentration exceeds the standard, an alarm will be automatically triggered, and the power system and nitrogen charging system will be urgently cut off.

sixCase analysis

1. somechemical industryenterpriseOxygen content gas online detection system

summary

This plan integrates an online monitoring system, portable detection equipment, and data analysis platform to achieve full process and precise detection of oxygen content in chemical industry reaction vessels. Combining domestic and international standards and industry practices, the solution has high reliability, high safety, and scalability, which can provide strong guarantees for the safety production of chemical enterprises. In the future, with the continuous advancement of technology, detection methods will further develop towards intelligence and online direction, promoting the continuous improvement of safety level in the chemical industry.