Portable constant velocity fly ash sampler for regular coal powder sampling on the air and coal powder pipeline

The portable constant velocity fly ash sampler produced by Lianyungang Lingdong Electromechanical Equipment Co., Ltd., also known as the fly ash constant velocity sampler or the swirling fly ash constant velocity sampler, is used for regular coal powder sampling on the secondary air coal powder pipeline in the direct blowing powder production system. Due to equipment wear and changes in coal types, the fineness of coal powder will undergo significant changes, which will affect the economic operation of the boiler. Therefore, based on the results of regular sampling and measurement of coal powder fineness, it is used as a basis for timely use of the folding door opening of the entire separator and damage to equipment comonents. This production uses compressed air blowing and suction sampling with an air extractor to avoid the occurrence of sampling port blockage and make sampling easy. The sampling speed is controlled by controlling the compressed air pressure. This can obtain a more accurate value of coal powder fineness- There are 4-8 coal pipes installed at the outlet of the separator of the general speed coal mill, which directly lead to the burner. The difference in coal powder fineness between each coal powder pipe is significant. For example, sampling coal powder separately from each coal powder pipe would require too much work, as the distribution of coal powder fineness in each coal powder pipe is relatively fixed and there exists a conversion relationship. By calibrating the coal powder samples taken through sampling devices installed on 1-2 coal powder pipelines, a more accurate coal powder fineness value can be calculated through conversion relationships.

The sampling method for carbon content in fly ash using portable constant velocity fly ash samplers is basically based on the analysis of impact type fly ash samplers; Alternatively, fall sampling can be used. Due to the lack of scientific methods, it is difficult to obtain true and consistent samples of fly ash composition. This poses difficulties in accurately measuring the carbon content of fly ash. In response to these issues, our company has developed a type of fly ash sampler, a constant velocity fly ash sampler, and a swirl type fly ash constant velocity sampler for continuous sampling of flue gas fly ash at the tail of power plant boilers. This enables accurate measurement of carbon content in fly ash and provides reliable basis for scientific calculation of boiler heat rate. The sampling is true and reliable, and it is a fly ash sampling equipment developed by Lianyungang Lingdong Electromechanical Equipment Co., Ltd.

Technical parameters of portable constant velocity fly ash sampler:

Specification and model

Working pressure MPa

Sampler gun length (mm)

Blowing tube length (mm)

material quality

BFH-600

0.1-0.5

six hundred

four hundred

Stainless steel 304

BFH-800

0.1-0.5

eight hundred

six hundred

BFH-1000

0.1-0.5

one thousand

eight hundred

BFH-2000

0.1-0.5

two thousand

one thousand and five hundred

Portable constant velocity fly ash sampler - special specifications can be customized according to customer requirements, with an estimated customization period of 7-15 days.

Working principle of portable constant velocity fly ash sampler:

The portable constant velocity fly ash sampler is developed using the principles of negative pressure suction and cyclone separation to extract fly ash from the flue and perform solid and gas separation. Please provide an explanation in conjunction with the fly ash sampling process.

During the fly ash 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 closed connections, and only the sampling head and sampling tube can be connected to the outside. So the emergence of negative pressure causes the fly ash in the flue to enter the sampling device along the sampling head. The fly ash is separated in the separator and enters the powder collection bottle, while the gas and a small amount of fine powder are carried out by compressed air through the outlet pipe at the upper outlet of the separator and sent into the flue, without causing pollution to the workplace.

The function of adding a blowing valve is to close the blowing valve after sampling the fly ash, and then open the sampling valve to blow away the remaining fly ash in the sampling pipe, in order to prevent the sampling pipe from being blocked by fly ash. And ensure accurate sampling.

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