The purpose of fly ash sampler

The purpose and function of the fly ash sampler produced by Lianyungang Lingdong Electromechanical Equipment Co., Ltd. is that the carbon content of boiler fly ash is an important indicator reflecting the combustion rate of coal-fired boilers in thermal power plants. Reasonably controlling the carbon content of fly ash is beneficial for reducing power generation costs, improving the economic efficiency of unit operation, helping power plant management personnel analyze boiler combustion rate, and improving the safe operation of the pulverization system and air supply system. In terms of purpose, the sampling method for carbon content in fly ash from internal power plants is basically using an impact type fly ash sampler for sampling and analysis; Alternatively, a drop plot sampling method can be used. Due to the large particle size of the ash samples collected through these methods, it affects the representativeness of fly ash sampling, especially due to the strict blockage of the ash path, which leads to an increase in maintenance. This poses difficulties in accurately measuring the carbon content of fly ash. If carbon content is measured using fly ash samples that lack representativeness, and then heat rate is calculated based on this data, the credibility of heat rate will be reduced. To address this issue, we have developed a type of externally powered self extracting constant velocity sampler. Used for constant velocity continuous sampling of flue gas and fly ash at the tail of power plant (station) boilers, to accurately measure the carbon content of fly ash and provide reliable basis for scientific calculation of boiler heat rate. Sampling is truly reliable and is an advanced equipment for replacing fly ash sampling.

Fly ash sampler structure-

The fly ash sampler consists of suction nozzle, sampling pipe, injection pipe, exhaust pipe, cyclone dust collector, static pressure pipe and other components. The fly ash sampler adopts a unique structure design, which can automatically track the changes in the flow rate of the boiler flue and maintain a constant sampling state. Therefore, the extracted ash samples have a relatively high representativeness, thereby ensuring the overall measurement reliability of the system. Due to the absence of rotating components such as an air pump, the reliability of the sampler's operation is greatly enhanced!

Fly ash sampler--

Sampling represents stable operation. (Technical requirements meet - standard)

The fly ash sampler adopts a special structure design of external power and self pumping constant velocity sampling, which can automatically track the changes in the flow rate of the boiler flue and maintain the constant velocity sampling state. Therefore, the extracted ash samples have a relatively representative quality. Meanwhile, due to the absence of rotating components such as an air pump, the operational reliability of the sampler is greatly enhanced.

Flexible installation method of fly ash sampler - sample

For different airflow directions, the sampling tube direction can be adjusted, the installation method is simple, and the operation is convenient.

Industrial design of fly ash sampler

As a sampling measurement equipment, the anti wear of the sampling probe plays a crucial role in the stable operation of the fly ash in the equipment. The wear of the sampling probe is mainly due to the erosion of the sampling tube by high-temperature flue gas. The degree of erosion of the sampling tube by fly ash flue gas with different particle sizes, hardness, and flow rates varies. Through years of exploration and improvement, our company has developed a fly ash sampler with anti clogging and anti wear capabilities. It mainly adopts the following technical measures: A. Grinding ceramic patches are used in the sampling tube in the direction of smoke flow. B. The technology of lining enamel is used inside the sampling bend, and the adjusting nozzle is made of PTFE material that is not easy to accumulate dust, ensuring that the device will not be clogged due to the adhesion of fly ash during long-term use C. Inside the cyclone dust collector, a ground ceramic patch is used; If the outdoor temperature is less than -200C, a high-energy membrane heater can be selected outside the cyclone dust collector to ensure that the fly ash is not easily bonded and worn.

The fly ash sampler is easy to expand and suitable for various methods of measuring carbon content in fly ash.

Installation instructions for fly ash sampler

1. The determination of sampling should be carried out on the vertical flue between the outlet of the economizer and the inlet of the air preheater. The specific installation location should generally meet the following conditions: the flue gas temperature should not be less than 200 ℃, and generally not exceed 400 ℃; In the straight pipe of the flue, there are no obstacles that affect the positive sampling inside the flue; The representative parts of smoke flow velocity and dust particles; There is a space outside the flue for convenient operation and maintenance.

2. Remove the insulation layer, open holes on the flue, and weld the transition flange close to the wall of the flue, with the flange surface perpendicular to the ground.

3. Install the sampler protective box.

4. Insert the sampling tube into the transition flange with the sampling head facing the direction of smoke flow.

5. Add a sealing gasket between the sampler and the transition flange, tighten the connection, and ensure sealing.

6. Restore insulation to prevent condensation and blockage of pipelines after sampling.

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