Overview of fixed coal powder sampler:
The fixed coal powder sampler is an equipment used for coal powder sampling on the secondary air supply pipeline in the positive pressure direct blowing coal powder system. During the daily operation of the coal mill, the wear and tear of the grinding parts, changes in coal type and block size, and significant changes in coal powder fineness will directly affect the combustion rate of the boiler and increase the cost of power generation. Therefore, regular sampling and testing of coal powder fineness should be carried out. When the coal powder fineness exceeds the design value, the grinding parts of the coal mill or the opening of the separator folding door should be adjusted in a timely manner to ensure that the coal powder fineness meets the design requirements.
Fixed coal powder sampler production and structure:
The cantilever type, hidden arm type, and rotary arm type fixed coal powder sampler uses compressed air as the power to generate negative pressure in the sampling tube, separator, and sampling bottle to extract coal powder for sampling purposes, and can use compressed air to blow the sampling tube to avoid the problem of blockage in the sampling tube. The equipment is equipped with a compressed air pressure regulating valve, which can adjust the pressure and flow of compressed air to control the sampling speed and achieve constant sampling speed. Make the extracted coal powder representative. The sampling tube adopts a hidden arm design, and when not in operation, the sampling tube is vertically hidden outside the coal powder pipeline to avoid the erosion of the coal powder airflow on the sampling tube, greatly improving the use of the sampling tube. Fixed coal powder sampler - Energy -:
(1) The overall production is made of stainless steel, with a clean and compact appearance, and a long overall service life.
(2) Simple structure, mechanical motion components, maintenance. Sampling is simple and convenient,
(3) Using constant speed sampling, the extracted coal powder sample is representative.
(4) Compressed air can be used to blow the sampling tube to avoid coal powder blockage.
(5) Fixed installation on coal powder pipeline, tightly sealed, with coal powder leakage, not polluting the working environment.
(6) When using the sampling tube, it is placed inside the coal powder pipeline. After taking the coal powder sample, it can be hidden outside the coal powder pipeline to avoid the erosion of the coal powder airflow and be used for a long time.
(7) - Can be operated by humans, with low labor intensity for operators.
The fixed coal powder sampler mainly consists of the following components:
1. Sampling tube - extend into the coal powder pipeline - with the sampling port facing the coal powder airflow, and the coal powder enters the sampler from here. Sampling is - Sampling.
2. Sampling bottle - Collect and store the coal powder samples separated from the cyclone separator for calibration purposes.
3. Cyclone separator - solid-gas separation is carried out on the gas powder mixture, and the coal powder is thrown to the wall of the separator by the rotating airflow due to force, and then falls into the powder collector by force. The separated gas rises along the intermediate path and is discharged from the outlet. It is then sucked by the injector and sent to the coal powder pipeline, achieving the separation of coal powder and gas.
4. Connect the union - for easy assembly.
5. Air intake short pipe - used for connecting compressed air.
6. Compressed air control valve - a switch that controls compressed air.
7. Compressed Air Pressure Regulating Valve - Adjust this valve to control the pressure and flow rate of compressed air, as well as the sampling speed. Make it a constant speed sampling.
8. Ejector air extractor - uses compressed air as power to generate negative pressure in the sampling tube, cyclone separator, and sampling bottle, allowing coal powder to smoothly enter the cyclone separator for solid gas separation.
9. Purge valve - Compressed air enters the coal powder pipeline and passes through this valve.
10. Sampling lever - This lever can be used to unfold or hide the sampling tube.
11. Sampling Valve - Switching this valve can control the sampling or blowing of the sampling tube to prevent blockage of the sampling tube.
12. Shell body - installed on the coal powder pipeline, the sampling pipe is hidden inside it when not sampling.
Working principle of fixed coal powder sampler:
The cantilever hidden arm rotary arm fixed coal powder sampler is successfully developed by using the principles of negative pressure suction and cyclone separation to extract the gas powder mixture from the coal powder pipeline and perform solid gas separation. During the sampling process, the sampling tube is extended into the coal powder pipeline, and all valves are in the open state. When compressed air passes through the injector and extractor from the outlet pipeline, its jet action causes negative pressure to be generated in components such as the cyclone separator, sampling tube, and sampling bottle, promoting the gas powder compound in the coal powder pipeline to enter the sampler along the sampling tube. The gas powder compound undergoes solid gas separation in the cyclone separator, The separated coal powder falls into the sampling bottle below the cyclone separator, and the gas is sucked by compressed air and sent to the coal powder pipeline. The entire operation process does not cause pollution to the workplace. Sampling - Adjust the compressed air pressure regulating valve to achieve constant speed sampling, making the extracted coal powder sample representative. (Compressed air pressure generally does not exceed 0.1Mpa).
Fixed coal powder sampler (anti blocking measures):
The use process of cantilever, hidden arm, and rotary arm fixed coal powder sampler equipment - compressed air can be used to blow the sampling tube to prevent it from being blocked by coal powder.
Fixed coal powder sampler (anti wear measures):
When not sampling, the sampling tube is hidden inside the casing and placed outside the coal powder pipeline. When sampling, pull the sampling lever and unfold the sampling tube in the coal powder pipeline. The sampling port should be facing the coal powder airflow, and all valves should be opened to start sampling. After sampling is completed, pull the sampling lever to hide the sampling tube outside the coal powder pipeline, avoiding the erosion of the coal powder airflow on the sampling tube and achieving the purpose of wear prevention.
Operating procedure for fixed coal powder sampler:
1. Sampling: Sampling - all valves are closed, - open the compressed air control valve; Adjust the compressed air pressure regulating valve 7 according to the pressure gauge to adjust the compressed air pressure to the desired pressure range. Pull the sampling lever; Unfold the sampling tube and connect it to the coal powder pipeline; Open the blowing valve; Open the sampling valve; Sampling begins for 2-4 minutes; Close the compressed air control valve, blowing valve, and sampling valve; Pull the sampling lever; Hide the sampling tube in the outer shell -; Remove the sampling bottle; Take out the coal powder sample and place the sampling bottle back in place, paying attention to the sealing at the interface.
2. Purging: Open the compressed air control valve; Close the purge valve; Open the sampling valve; Compressed air will blow the sampling tube through the sampling valve.
-Special specifications can be arranged separately according to user needs for design schemes! Interested parties contact us!
Installation requirements for fixed coal powder sampler:
1. On site compressed air of 0.4-0.6Mpa is required.
2. The cantilever hidden arm rotary arm fixed coal powder sampler is vertically installed on the coal powder pipeline with an operating platform at a distance of 1000-1500mm, and is opened 500 meters downwards × 40mm (length × The installation holes are wide (specific dimensions are calculated according to the parameters of the coal powder pipeline), and the outer shell is fixed by welding the installation flange.
Technical parameters of fixed coal powder sampler model:
Model: MF-XXX
Model description: MF: Fixed coal powder sampler device. XXX: Coal powder pipeline diameter.
Ordering instructions for cantilever hidden arm rotary arm fixed coal powder sampler:
Users are required to provide the following data when placing an order:
1. Order quantity
2. Flute diameter and wall thickness
3. Space installation location
4. Operation mode (electric, manual)
Note: The above production technical specifications are for reference only and are primarily for international design purposes.
