The flue gas analyzer is used for boiler energy efficiency testing and environmental emission analysis. It is compact, portable, and has high data accuracy. The most lightweight instrument is only1.5Kg.

Smoke analyzers have become the most popular analytical instruments in today's industrial and environmental monitoring sectors, widely used in petroleum, fertilizer, cement, metallurgy, and thermal power plants,CEMSIn terms of other aspects, smoke analyzers are receiving increasing attention from people.

The analysis principles of different flue gas analyzers may vary, and now we will compare several flue gas analysis methods.

The traditional flue gas analysis method, namely the general gas analysis instrument method, uses different solutions to sequentially absorb different components in the gas sample:40%Sodium hydroxide absorbs carbon dioxide from the sample;Absorption of oxygen in the sample using potassium pyrogallate solution;Use an ammoniacal cuprous chloride solution to absorb carbon monoxide in the sample. Then calculate the content of each component based on the change in sample volume before and after absorption. General flue gas analyzers can only detect and analyze individual components one by one, without multiple input and signal processing functions. Analysis is time-consuming, operation is cumbersome, response speed is slow, efficiency is low, and it is difficult to analyze production conditions in real time. It is gradually being replaced by fully automated analytical instruments.

The chromatographic analysis method of flue gas analyzer uses a chromatographic column to separate all components in flue gas - oxygen, nitrogen, carbon monoxide, carbon dioxide - through a single injection. The entire analysis process is measured and recorded by a detector and recorder, and then the content of each component is calculated by normalizing the area. Chromatography has high separation efficiency, low sample usage, can perform multi-component analysis, high analysis accuracy, and long calibration cycle. However, this type of flue gas analyzer is expensive and requires high sample quality, as well as high requirements for operator quality. Therefore, it is generally difficult for small factories to afford.

The infrared analysis method of flue gas analyzer is simple and feasible. Its working principle is based on the selective absorption of infrared radiation of different wavelengths by certain gases, and the degree of absorption depends on the concentration of the measured gas. For different molecular compounds, each molecule can only absorb infrared radiation energy within a certain wavelength range, that is, each molecular compound has one or several specific absorption frequencies, called characteristic frequencies.COTheCOThere is a fixed characteristic frequency, therefore theCOTheCOThe content is easily detectable.

The infrared analyzer for flue gas analysis also has the following advantages: ① good selectivity. For mixed gases of multiple components, regardless of changes in the concentration of interfering components in the background gas, it only reacts to the concentration of the tested component;② Wide analysis scope;③ Short analysis cycle and fast response time;④ Multiple components can be measured simultaneously. But it is not applicable for analyzing symmetric structure non-polar diatomic molecules and single atom molecular gases