CEMS flue gas continuous emission monitoring system (Continuous Emission Monitoring System) refers to the device that continuously monitors the concentration and total emission of gaseous pollutants and particulate matter emitted by air pollution sources and transmits the information to the competent authority in real time by gaseous pollutants (SO2 NOX ) monitoring subsystem particle (dust) monitoring subsystem flue gas parameter measurement subsystem data acquisition and processing subsystem data communication system and other components. The concentration of pollutants in the flue gas is measured by on-site sampling, and the parameters such as flue gas temperature, pressure, flow rate, humidity, and oxygen content are measured, and the emission rate and amount of flue gas pollutants are calculated.

Analysis of common faults of flue gas online monitoring system


Poor water removal effect affects the normal operation of the flue gas analyzer

Compared with the atmosphere, the water vapor content in the flue gas is higher, and the variation range is large. For the convenience of comparison, the monitoring method is based on the dry flue gas in the standard state after removing the water vapor as the benchmark to express the determination results of harmful substances in the flue gas.

After the sample gas enters the analysis cabinet, the moisture in the sample gas is quickly separated by the dehumidification system and the condensed water is discharged to minimize the moisture content in the sample gas, so that the sample gas entering the analyzer component is a dry gas to meet the requirements of the analyzer. sample requirements

The dehumidification system generally consists of a condenser, a sampling pump, a peristaltic pump and related alarm and control components. The peristaltic pump is used for condensate drainage.


The main faults in common dehumidification systems are


The cooling effect of the condenser is not ideal. The sample gas contains a lot of moisture and is not separated. There are water droplets in the analyzer filter and flow meter. If it runs for a long time, the analyzer will be damaged.



Case introduction of a domestic environmental protection technology company


The condensate water separation system is used in the gaseous pollutant monitoring subsystem to separate the gas and water before entering the gas analyzer, and discharge the condensed water, thereby reducing the humidity of the analyzed gas and preventing corrosion to the gas analyzer and other components

The customer uses Rongbai fixed speed OEM peristaltic pump with 25# pharmed BPT pipe for continuous discharge of condensed water.

Application Requirements Highlights


Gas monitoring needs to strictly ensure the tightness of the monitoring system. Therefore, the condensate drainage system is required to be well sealed to prevent outside air from entering the condenser through the drainage system and affecting the composition of the sample gas.

The chemical composition of condensed water is complex and has a certain degree of corrosiveness. The condensed water drainage system is required to have good anti-corrosion performance.

When the sample gas filtration effect is not good in the early stage, the condensate water will also contain solid particles. The condensate water discharge system is required to be suitable for abrasive fluids.

The condensate drainage pump is suitable for vacuum environment and the flow rate is 10ml/min and can run continuously


Value


The Rongbai peristaltic pump itself has good air tightness without the use of valves and seals. There is no liquid backflow and siphoning. Even when the pump is not running, the hose will be well sealed due to squeezing. It can prevent outside air from entering the condenser through the drainage system. Affects gas analysis results.

When the Rongpai peristaltic pump transmits fluid, the fluid only contacts the inner cavity of the hose. Selecting suitable hoses with corrosion-resistant materials can be used to transmit corrosive condensed water for a long time.

Rongpai peristaltic pump has low shear force when transferring fluids containing solid particles, there is no problem of sticking and blocking, and it will not affect the service life of the pump.

Rongbai peristaltic pump has a strong self-priming ability, suitable for vacuum environment and the pump can run dry without any damage, which can effectively drain condensate and reduce maintenance costs.

Pharmed BPT peristaltic pump tubing has good resistance to common chemicals and excellent resistance to acids, bases and oxides, and has a long service life that allows the system to operate stably for years without the need to replace hoses, further reducing system maintenance costs.