Working principle of CEMS flue gas online analysis system

CEMS flue gas online analysis system extracts flue gas through electric heating type direct extraction probe, after dust removal heating (120~180℃), heat preservation (more than 120℃) link, the sample gas is guided to the pretreatment system (mainly to remove particulate matter, H2O/corrosive gases, corrosive gases, etc.), and then transported to the analyzer by the sample gas control system for analysis.

Corrosion-resistant sampling composite pipe installation and maintenance

CEMS system is a very important part of the desulfurization system, whether it can work properly is related to the safe and stable operation of the desulfurization facilities. Whether it is semi-dry desulfurization or wet desulfurization, when the flue gas is desulfurized, the SO2 content in the flue gas is low, and the flue gas temperature is low and contains a lot of water, so it is easy to condense in the flue gas sampling line and cause the measurement value to be inaccurate. Especially, the flue gas contains large amount of soot, which is easy to block the sampling line when it meets water.

CEMS sampling tube to understand

cems sampling tube is suitable for sampling measurement of collecting exhaust smoke, coal in use to produce SO2, NO, CO and other gases, cems collection sample gas, the temperature of the smoke begins to fall, the internal vapor condensation into water, SO2 and water reaction, the production of sulfurous acid, the production of sulfurous acid, where the vapor condensation into water, the production of sulfurous acid, which is where the water Therefore, in order to prevent the condensation of water vapor in the smoke, it is necessary to ensure that the temperature is higher than the condensation point.

Solving common problems in CEMS tracing lines

CEMS tracer lines are suitable for collecting and discharging sampling and measuring flue gas. Coal produces SO2, NO, CO and other gases in the process of use. During the mining process, the flue gas temperature starts to drop, the steam in the flue gas condenses into water, and SO2 starts to react with water to form sulfite. The presence of moisture in the pipe affects the measurement accuracy and instrument life. Therefore, in order to prevent the vapor in the flue gas from condensing, it is necessary to ensure that the temperature is higher than the condensation point. In order to avoid the condensation of steam in the sampling tube into water, it is necessary to carry out heat tracing together with the heat tape, how to control the sampling tube combined with the heat tape.

What are the knowledge points of cems sampling tube?

The customized cems sampling tube can choose different materials, such as FEP, PTFE, PFA, stainless steel tube, etc. You can choose to accompany the heat of the middle and low temperature area at the same time, in addition, you can also add compensation wire, power line, etc.

What is the main role of heat tracing piping？

The heat tracing pipeline is a high-tech product that uses the energy of heat to supplement the heat lost by the companion heat body in the engineering process and maintain a more reasonable engineering temperature of the flowing medium. Electric heat is distributed uniformly along the length of the pipe or a large area of the tank volume, unlike the electric heat that concentrates the heat load height in a point or small area. The semi-heat pipe has a small temperature gradient, a long thermal stability time, suitable for long-term use, and the heat required (power) is much lower than electric heating. Electric heating has the advantages of high thermal efficiency, energy-saving design, easy construction and installation, no pollution, long life, remote control and automatic control, replacing steam, hot water waste heat technology development direction is the national focus on promoting energy-saving projects.