The Swiveling Coal Powder Sampler is crucial for the precise control and analysis of the fineness of coal powder in power plant coal-fired boilers, which is of great significance for the safe and economic operation of boiler units. Currently, the use of positive pressure direct blowing pulverizing systems in large units is increasing. Due to the coal powder directly being sent into the furnace by the primary air under positive pressure at the outlet of the coal mill, it is very difficult to collect coal powder samples on a daily basis. Generally, the self-spraying method is used, which has poor accuracy and often fails to seal properly during sampling, leading to coal powder leakage and a poor working environment with high labor intensity. Xi'an Thermal Power Research Institute Co., Ltd., with decades of experience in theoretical and engineering application research on gas-solid two-phase flow, has collaborated closely with the factory to develop a new patented product, the Swing Arm Fixed Coal Powder Sampling Device. This device can conveniently achieve isokinetic sampling of coal powder in positive pressure direct blowing pulverizing systems. Its features include simultaneous isokinetic sampling at multiple points, ensuring good representativeness of the samples, good repeatability in multiple sampling, simple operation, and no coal powder leakage. This significantly improves the working environment and reduces labor intensity, making it an ideal sampling device for daily coal fineness analysis in power plant boilers with positive pressure direct blowing pulverizing systems.
Section II: Installation Location
This device is typically installed on the vertical section of the coal powder pipeline at the outlet of the coal mill, selecting a location that is convenient for setting up a sampling platform and where the straight section is long enough to ensure sampling accuracy. The installation method is very convenient, as shown in the attached illustration, simply drill a rectangular opening of specified dimensions (width: 80mm, length approximately equal to the pipe diameter + 168mm) at the installation site, and then embed the base of the fixed sampler into the opening. Additionally, a compressed air line must be routed to each sampling location to serve as the compressed air source for sealing, blowing, and suction.
Section 3: Pressure for Sampling Verification
Remove the screws from the static pressure tube on the shell and sampling tube.
2. Install a U-shaped pressure gauge between the two static pressure tubes.
3. Rotate the sampling tube to the sampling position, open the sampling valve and blow-down valve.
4. Gradually open the compressed air valve until the U-tube pressure gauge reads zero or nearly zero (the water levels on both sides are even).
5. Record the pressure reading on the pressure gauge of the sampler at this moment, as a reference pressure for future sampling.
Section 4: Sampling Process
1. The collection bottle has been securely tightened onto the separator.
2. Open the sampling valve and purge valve
3. Adjust the air compressor valve to set the pressure gauge to the reference pressure.
4. Pull the handle to the horizontal position to begin sampling, and maintain the specified duration.
5. Gently slide the pole back into place and close the air valve.
6. Close the sampling valve and purge valve.
7. Unscrew the sampling bottle, pour out the powder sample, and then re-tighten the bottle onto the separator.
8. Complete the sampling process
V. Blasting Process:
1. The collection bottle is securely tightened onto the separator.
2. Ensure the sampling valve is in the closed position.
3. Open the blow-off valve.
4. Open the compressed air valve for blowing.
After a period of time, close the compressed air valve.
6. Close the blow-off valve to complete the blow-off process.

Ordering Instructions
1. Coal powder pipeline shape and dimensions
2. Installation Space Location
3. Are there any special material requirements?

4. Order Quantity