Corrosive Gas Moisture Analyzer Introduction

Water molecules exist in every corner of life. In modern industrial production, the production process requires more and more water. For example, during the polymerization of polyethylene, the catalyst may fail due to the characteristics of water. In the production of chlor-alkali, water and chlorine combine to form acid, which severely corrodes production equipment. Therefore, the control and detection of water becomes more and more important. There are many kinds of moisture analysis instruments at present. In the instrument and meter exhibition online surface, you can see various instruments supplied by enterprises, such as on-line moisture analyzer, corrosive gas analyzer and so on. In this article we will give you some knowledge of corrosive gas analyzers.

The MM500 series corrosive gas trace water analysis system is designed for the problems existing in the current trace water analysis. Can fully meet the needs of laboratories in the chemical industry and online moisture analysis. The system consists of a pre-processing part and a host.

1. Pretreatment System The pretreatment system consists of a sampling system, a decompression system, a filtration system, a flow control system, a rapid bypass system, and a detection probe. The sampling system ensures that the sample gas collected is representative. The filtration system filters solid particles above 1 micron. The sample connecting line is connected with PTFE material. The fast bypass system speeds up sample gas circulation. Smooth pipe walls and high-quality pipe fittings guarantee the fastest and most accurate analysis results. The most important analytical instrument is the British MM500 corrosive gas trace water analyzer. Can measure the water content of almost all corrosive gases such as: chlorine (Cl2), hydrogen chloride (HCl), hydrogen sulfide (H2S), sulfuric acid gas (H2SO4), hydrogen bromide (HBr), sulfur dioxide (SO2), hexafluoride Sulfur (SF6), carbon dioxide (CO2), and phosphine (PH3).

The role of the pretreatment system:

• Filtration of mechanical impurities in the gas • Extended probe life • Control of gas flow • Easy instrument calibration • Easy instrument maintenance • Safe operation of the system Pretreatment system features:

• Corrosion-resistant materials are used in the piping • Corrosion-resistant flowmeters are used • Corrosion-proof shut-off valves are used to ensure long-term use • Sealed tanks and purge gas protection ensure that the secondary instruments are not eroded • Pre-treatment tanks are used Ventilation measures will not collect harmful gases.

The working principle of the analytical instrument:

Since electrolysis of trace amounts of water is a very small current, the circuit part uses a high-tech solid-state calculation circuit. It can ensure accurate and stable measurement. The minimum detection line can reach several ppm. Measuring principle:

Phosphorus pentoxide electrode is based on the principle of generating hydrogen and oxygen from electrolyzed water. The amount of water can be calculated by calculating the amount of electrolysis electricity. The electrode consists of two metal wires wound in parallel on the glass rod at equal distances. Platinum wire or wire is usually used. A thin layer of phosphoric acid solution is evenly coated between the wires. Current breaks down water for hydrogen and oxygen. The final result of electrolysis is the final conversion of phosphoric acid to phosphorus pentoxide. Phosphorus pentoxide is a chemical substance that can strongly absorb moisture and can absorb the moisture in the sample gas. By constantly electrolyzing water, a balance is established between the moisture in the sample and the electrolyzed water. The current between the electrodes is proportional to the sample gas. The moisture content can be read out through the display.

After a long period of use, the electrode can be artificially regenerated on site, eliminating the need for maintenance work to be returned to the factory.