Sampling Cooler
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Coal Powder Sampler
Pulverized coal Sampling devices are indispensable specialized equipment in the pulverizing systems of thermal power plants.
- ISO 9001:2015
- NDA on request
- 1 pc MOQ
- DDP available
About this part
Pulverized coal Sampling devices are indispensable specialized equipment in the pulverizing systems of thermal power plants. They are used to obtain pulverized coal samples at a constant speed, continuously, and without contamination from the high-speed primary air pulverized coal pipeline. As a "diagnostic sentinel" for boiler combustion optimization, this device achieves three core functions:
Quality Monitoring: Accurately determines pulverized coal fineness (R90/R200) and uniformity index n
Energy Efficiency Assessment: Calculates combustion efficiency through elemental analysis
Safety Warning: Detects abnormal particles (iron parts, gravel, etc.) II. Technical Parameters and Performance Indicators
Operating Parameters
Parameter categories | Normal range | Special design capabilities |
Applicable pipe diameter | DN300-DN1200 | Rectangular pipe adapter |
Work pressure | From atmospheric pressure to 0.5 MPa | Negative pressure system special type |
medium temperature | 70-120℃ | High-temperature type can reach 200℃ |
Sampling time | 3-15 minutes/session | Automatic continuous sampling mode |
Sampling amount | 50-500g/time | Micro-sampling (10g) |
constant speed ratio | 1.0±0.05 | Dynamic adjustment system |
Performance Verification Standards
Representativeness: Sampling deviation < ±5% (compared to actual pulverized coal characteristics)
Repeatability: Data dispersion at the same sampling point < 3%
Sealing: Leakage rate < 0.5%/h in a 4MPa air pressure test
Abrasion Resistance: Lifespan of key components > 100,000 sampling cycles (HV ≥ 800)
Working Principle of Pulverized Coal Sampling Device
The fixed pulverized coal sampling device is designed based on the principle that pulverized coal impacts and settles naturally in the sampling nozzle, then is conveyed out of the pulverized coal pipeline by a screw conveyor and falls into the sampling bottle. The sampling nozzle is fixedly installed in the pulverized coal pipeline, facing away from the direction of pulverized coal airflow. The pulverized coal is carried by hot air in an irregular state in the pipeline. Impacted by the sampling nozzle and settling naturally, a large amount of pulverized coal accumulates in the nozzle. Then, the screw conveyor in the sampling tube conveys the coal into the pulverized coal settling tube. After sampling, the valve is operated to release the pulverized coal into the sampling bottle.
Structure of the Coal Powder Sampling Device
- Screw Conveyor – Inserted into the coal powder pipeline, with the sampling nozzle facing away from the coal powder airflow direction. The coal powder settles in the sampling nozzle and is then conveyed by the screw conveyor through the sampling tube into the sampling bottle.
- Installation Connecting Pipe – Welded to the coal powder pipeline so that the sampling tube can be inserted into the coal powder pipeline from here.
- Connecting Flange – The sampling tube is inserted into the coal powder pipeline through the connecting flange and connected and sealed to the installation connecting pipe.
- Assembly Sealing Flange – Used for assembling and sealing the rotating mechanism.
- Handle – During sampling, the handle is turned to rotate the screw conveyor, conveying the coal powder into the sampling bottle.
- Coal Powder Settling Tube – Coal powder and coal sample enter this tube through the screw conveyor.
- Ball Valve – Used for sealing and sampling.
- Sampling Bottle – The collected coal powder is stored for calibration purposes.
Troubleshooting Guide
Fault phenomenon | Possible reasons | Solution |
Insufficient sample size | Probe blockage/insufficient negative pressure | Backflush/inspect vacuum pump |
Granularity data anomaly | Deviation of constant velocity ratio/uneven mixing | Recalibrate/Extend sampling time |
Motor overload | Mechanical jamming | Check guide rails / remove foreign objects |
Communication interruption | Line interference/module failure | Shielding inspection/replacement of communication module |
Quality documentation included
- Dimensional inspection report (CMM / profile projector) for critical features
- Material certificate with heat number traceability
- Surface finish and hardness records where specified
- Photographic packing record before shipment
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FAQ
Common questions
What products does Lianyungang Huaneng Power Auxiliary Equipment manufacture?
We manufacture power plant dampers (flue gas, desulfurization, high-temperature baffle doors), slide gate valves, blind flange valves, rotary film and sponge iron deaerators, venting silencers, automatic dosing devices, steam-water sampling devices and sampling coolers, coal powder samplers, condensate recovery units, coarse and fine powder separators, and plate / shell-and-tube heat exchangers.
Which certifications does your factory hold?
We are certified to ISO 9001:2015 (quality), ISO 14001:2015 (environmental) and ISO 45001:2018 (occupational health and safety) management systems. We are also a qualified supplier of Sinopec, PetroChina, China Guodian Corporation, China Datang Corporation, CNOOC and Aluminum Corporation of China Limited.
Can you match a damper or valve to our existing ductwork?
Yes — most of our business is retrofit supply. Send us the duct cross-section, design temperature and media, or drawings, templates and photos of the existing installation. Our engineers will dimension the unit, its flange drilling and the actuator interface to bolt directly into your plant.
What leakage performance do your dampers achieve?
Louver-type double-layer dampers with sealing air achieve a leakage rate below 0.5%; fully sealed slide gates and coal mill isolation doors achieve zero internal and external leakage. Every damper is leakage-tested in the works before shipment and a factory acceptance test report is supplied.