The selection and use of high-temperature flue gas sampling pumps require comprehensive consideration of factors such as gas temperature, composition, corrosiveness, and particulate content. Below are the key features to consider during selection and operation:

1. High-Temperature Resistance

Feature: Flue gas temperatures often exceed 100°C and can reach 500°C or higher, so the flue gas sampling pump must withstand extreme heat.
Selection Criteria: Choose flue gas sampling pumps made of high-temperature-resistant materials (e.g., stainless steel, ceramics) to ensure the pump body and seals do not deform or fail under heat.

2. Corrosion Resistance

Feature: Flue gas may contain corrosive gases (e.g., SO₂, NOₓ, HCl), demanding high material durability.
Selection Criteria: Opt for corrosion-resistant materials (e.g., PTFE, Hastelloy) to ensure long-term performance without degradation.

3. Particulate Handling Capability

Feature: Flue gas often contains dust and particulates, which can clog or damage flue gas sampling pump components.
Selection Criteria: Select flue gas sampling pumps with built-in filtration or particulate-handling capabilities, or install pre-filters to prevent particle ingress.

4. Flow Rate and Pressure Requirements

Feature: The flue gas sampling pump must provide stable flow and sufficient pressure to ensure smooth gas passage through the sampling system.
Selection Criteria: Match the pump’s flow rate and pressure to the system’s requirements, accounting for sampling needs and resistance.

5. Sealing Performance

Feature: Effective sealing is critical to prevent gas leaks or air infiltration.
Selection Criteria: Use high-temperature seals (e.g., graphite, fluororubber, PTFE) to maintain integrity under heat.

6. Cooling System

Feature: Prolonged high-temperature operation can cause overheating, reducing efficiency and lifespan.
Selection Criteria: Select pumps with cooling systems (e.g., water- or air-cooled) or add external cooling to ensure stable operation.

7. Maintenance and Cleaning

Feature: Dust and particulate buildup necessitate regular upkeep.
Usage Tip: Inspect the pump periodically, clean filters, and replace wear-prone parts to sustain performance.

8. Power and Control System

Feature: Stable power and control systems are essential for accurate, repeatable sampling.
Selection Criteria: Choose pumps with reliable power supplies and speed control (e.g., variable frequency drives) for consistent operation across conditions.

9. Portability and Installation

Feature: Some applications require portable or lightweight designs for field use.
Selection Criteria: Select fixed or portable pumps based on practical needs, ensuring ease of installation.

10. Safety Performance

Feature: Operating in high-temperature, high-pressure, and corrosive environments demands robust safety measures.
Selection Criteria: Prioritize pumps compliant with safety standards, featuring automatic shutdown or alarms for overheat/overpressure scenarios.

Summary

Selecting and using a high-temperature flue gas sampling pump requires balancing factors like heat/corrosion resistance, particulate handling, flow/pressure, sealing, cooling, maintenance, power control, portability, and safety. Proper pump selection, operation, and maintenance ensure sampling accuracy and long-term reliability.