Overview of Mobile Coal Powder Sampler

The manual mobile coal powder sampler produced and manufactured by Lianyungang Lingdong Electromechanical Equipment Co., Ltd. can also be called a portable coal powder sampler. It is mainly used for regular coal powder sampling on the secondary air coal powder pipe in the positive pressure direct blowing coal powder system.

Due to the wear and tear of the grinding components of the coal mill, as well as changes in coal type and block size, the fineness of coal powder will undergo significant changes and directly affect the combustion rate of the boiler. Therefore, it is necessary to regularly sample and measure the fineness of coal powder. When the fineness of coal powder exceeds the design value, it is necessary to adjust the opening of the separator folding door in a timely manner or replace the grinding components.

The mobile coal sampler uses compressed air as the power source and uses a jet air extractor to suction the separator into a negative pressure principle for sampling. It also has a backflushing function, avoiding the problem of clogged sampling ports and making sampling easy. The sampling speed is controlled by adjusting the compressed air pressure and flow rate- The general pressure should be controlled between 0.05 and 0.1Mpa, so that the sampling can be representative and accurate coal powder fineness values can be obtained.

The mobile coal sampler is equipped with a pressure regulating valve after the compressed air valve. Due to the pressure of compressed air provided by power plants being around 4-6 kg, it is difficult to achieve the working pressure required for mobile coal powder samplers solely by adjusting the compressed air valve. Sampling distortion often occurs due to excessive pressure, which does not represent.

Structure and partial composition of mobile coal sampler: The sampling tube of the mobile coal sampler is inserted into the coal powder pipeline, with the sampling port facing the coal powder airflow, and the coal powder enters the sampling device through this port. The form is sampling. The mobile coal sampler separator separates coal powder and gas. The coal powder is thrown onto the wall of the sampler by the rotating airflow due to force, and then falls into the coal collector through force. The mobile coal powder sampler sampling bottle is used to collect and store coal powder samples separated from the separator for calibration purposes. The sampling valve of the mobile coal powder sampler is opened when coal powder is sampled. The airflow formed by compressed air from the outlet is used to suck the air from the separator, creating a negative pressure. The coal powder enters the sampling device from the sampling port for sampling. The blowing valve of the mobile coal sampler is used to open the sampling valve and compressed air valve, close the blowing valve, and use compressed air to blow the sampling tube when it is necessary to clean the residual coal powder in the sampling tube. The pressure regulating valve of the mobile coal powder sampler is an adjustable valve that can control the pressure and flow rate of compressed air and change the sampling speed of the sampling device. The pressure cannot be adjusted too high to prevent distortion in coal powder sampling. Pneumatic sealing device for mobile coal powder sampler - to prevent coal powder leakage when the sampling pipe enters and exits. Composed of ball valve, pipe joint, and union.

Working principle of mobile coal powder sampler: The mobile coal powder sampler is developed by using compressed air suction to form negative pressure inside the equipment. It successfully sucks coal powder out of the coal powder pipeline and separates solid and gas. Please provide an explanation in conjunction with the coal powder sampling process. During the coal powder sampling process, all valves are in an open state. When compressed air is sprayed out from the outlet pipe, its jet action causes negative pressure at the pipeline connected to the sampling valve, and the gas inside the pipeline is carried out. The separator and its bottom powder collection bottle are connected in a sealed manner, and only the sampling head and sampling tube can be connected to the outside. So the emergence of negative pressure causes the coal powder in the coal powder pipe to enter the sampling device along the sampling pipe. The coal powder is separated again in the separator and enters the powder collection bottle. The gas and a small amount of fine powder are separated again from the upper outlet of the separator through the blades in the outlet pipe, and are carried out by compressed air and sent into the coal powder pipeline, which does not cause pollution to the workplace.

The function of adding a blowing valve is to close the blowing valve after coal powder sampling, and open the sampling valve to blow away the residual coal powder in the sampling pipe to prevent the sampling pipe from being blocked by coal powder. And ensure accurate sampling.

Mobile coal powder sampler model: YDMF-XXX

Model description of mobile coal powder sampler: YDMF: Coal powder sampling device. XXX: Coal powder pipeline diameter.

All components of the mobile coal sampler include 1 compressed air interface, 2 compressed air valve, 3 pressure regulating valve, 4 sampling valve, 5 injector, 6 blowing valve, 7 movable joint, 8 sealing valve, 9 pneumatic sealing device, 10 connecting pipe, 11 sampling sleeve, 12 sampling pipe, 13 movable joint, 14 separator, 15 sampling bottle, 16 compressed air valve, and 17 compressed air interface.

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