Fly ash sampler

Overview of fly ash sampler:

The fly ash sampler is a device used for sampling fly ash from the tail gas of boilers in thermal power plants, providing a safe and reliable scientific basis for measuring boiler combustion losses in power plants. The equipment is used by the home appliance factory, but it is not. This device is easy to operate, has a short sampling time, and can meet user requirements to the greatest extent.

Fly ash sampler, fly ash constant velocity sampler, and swirling fly ash constant velocity sampler are used for regular coal powder sampling on the secondary air coal powder pipeline in the direct blowing pulverization 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 components. 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.

Application of fly ash sampler device:

The fly ash sampler device is mainly suitable for the requirements of various boiler usage units, institutes, boilers, power, chemical, metallurgical and other industries for boiler flue gas laboratory sampling, as well as irregular sampling of various media in different industries. Complete sampling at a constant rate to ensure a representative pair of samples is taken.

The fly ash sampler devices are divided into two categories: fixed fly ash sampler devices and portable constant velocity ash powder sampler devices. The fixed fly ash sampler device is generally suitable for boiler users. The equipment is fixed on the straight part of the flue gas pipeline and cannot be moved for sampling. The portable fly ash sampler device is suitable for most cases of irregular sampling requirements, and is suitable for the sampling requirements of various hospitals, boilers, and other media.

Application of fixed fly ash sampler device:

The swirl type constant velocity fly ash sampler device is a new type of production that replaces the impact type and accumulation type sampling. The constant velocity fly ash sampler device is used for continuous constant velocity sampling of flue gas and fly ash at the tail of the boiler to accurately measure the carbon content of fly ash, providing a reliable basis for scientific calculation of boiler heat rate.

Application of portable constant velocity ash powder sampler device:

The portable constant velocity ash powder sampler device is suitable for sampling fly ash in various sizes of boiler flues. The carbon content measurement of fly ash is the main technical indicator reflecting the combustion rate. To improve the combustion process, the key issue is the suitability of measuring the carbon content of fly ash- Provide measurement results for operators, enable timely adjustment, improve boiler combustion rate and coal consumption, and improve boiler efficiency. This product meets relevant standards in terms of technology, has a reasonable structure design, is easy to carry and use, has fast sampling, low sampling labor intensity, and can be operated by people. This portable fly ash sampler can be matched with several sets of sampling and sealing seats for use. Investment is rare - it is a substitute production for fixed fly ash samplers-- The problem of sampling fly ash in flue gas ducts has been solved, enabling power plants to accurately monitor the carbon content of fly ash, thereby improving the economic efficiency of boiler operation. Provide reliable basis for scientific calculation of boiler heat rate.

Application scope of portable constant velocity ash powder sampler device:

1. The regular sampling of fly ash from power plants is to check the carbon content of flue fly ash.

2. When using the boiler, use a fly ash sampler for testing and adjust the relevant operating parameters of the boiler in a timely manner, always ensuring the economic operation of the boiler.

3. Measure the particle size and carbon content of fly ash.

4. - Coal combustion test, using a portable fly ash sampler to evaluate the grinding energy of a coal mill on a certain coal type.

Portable constant velocity ash powder sampler device - assembly and use:

The FFQ-I-I portable constant velocity ash powder sampler device mainly consists of a sampling gun barrel, a velocity connecting movable joint, a primary separator, a secondary separator, a sampling bottle, etc.

1. A portable fly ash sampler can be equipped with several sets of sampling and sealing seats, which need to be installed on each fly ash pipeline during use.

2. When installing the sampling sealing seat, simply open a small circular hole on the secondary air duct and weld the sampling sealing seat onto the fly ash pipeline.

3. When sampling, check if all components of the sampling gun are connected properly, and only after confirming that the sampling bottle and other connections are incorrect, can sampling begin.

4. Open the fly ash pipeline for sampling and measurement - seal the seat, insert the sampling gun into the pipeline in the direction of the airflow, and sample step by step in the same direction. As shown in the figure:

5. After sampling, retract the sampling gun and close the sampling sealing valve.

The fly ash sampler is divided into:

There are two types of fixed fly ash sampler devices and portable constant velocity ash powder sampler devices.

1. The fixed fly ash sampler device is generally suitable for boiler users. The equipment is fixed on the straight part of the flue gas pipeline and cannot be moved for sampling.

2. The portable constant velocity ash powder sampler device is suitable for most cases of irregular and irregular sampling requirements, and is suitable for the sampling requirements of various hospitals, boilers, and other media.

The swirl type constant velocity fly ash sampler is a new type of production that replaces the impact type and accumulation type sampling. The constant velocity fly ash sampler is used for continuous sampling of flue gas and fly ash at the tail of boilers, which accurately measures the carbon content of fly ash and provides a reliable basis for scientific calculation of boiler heat rate. Mainly applicable to the requirements of various boiler users, institutes, boilers, power, chemical, metallurgical and other industries for boiler flue gas laboratory sampling, as well as irregular sampling of various media in different industries.

Introduction and function of fly ash sampler:

1. Sampling head - The smoke flow enters the sampler from this port.

2. Sampling tube - The smoke flow enters the glucoside air separator through the sampling head through this tube.

3. Pressure transfer tube - adjusts the flow rate of fly ash in the sampling tube to be equal to the flow rate in the flue through the pressure indication of the pressure transfer tube.

4. "U-shaped" tube - refers to the pressure indicator inside the sampling tube and flue.

5. Outlet pipe - The smoke airflow enters the sampling device through the outlet pipe when the pressure is lower than the pressure inside the flue.

6. Cyclone separator - The flue gas flow is separated here, and the fly ash enters the ash collection hopper. The gas is discharged from the outlet pipe.

7. Ash collection hopper - collects the falling ash from the cyclone separator.

8. Sampling bottle - used to collect fly ash samples.

The fixed fly ash sampler device is developed using the principles of negative pressure suction and cyclone separator 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 opened. 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 the sampling bottle at its bottom are closed connections, and only the sampling tube can be connected to the outside. So the appearance of negative pressure promotes the gas and ash compounds in the flue to enter the sampler along the sampling tube. The gas and ash compounds are separated in the separator, fly ash enters the sampling bottle, and gas is carried out by compressed air from the upper outlet of the separator.

The function of the blowing valve is to open and blow away the remaining fly ash in the pipeline after the fly ash sampling, in order to prevent the sampling pipe from being blocked by fly ash and ensure accurate sampling. The blowing valve can also be used as a shut-off valve.

The portable constant velocity ash powder sampler device is suitable for sampling fly ash in various sizes of boiler flues. The carbon content measurement of fly ash is the main technical indicator reflecting the combustion rate. To improve the combustion process, the key issue is the suitability of measuring the carbon content of fly ash- Provide measurement results for operators, enable timely adjustment, improve boiler combustion rate and coal consumption, and improve boiler efficiency. This product meets relevant standards in terms of technology, has a reasonable structure design, is easy to carry and use, has fast sampling, low sampling labor intensity, and can be operated by people. This portable fly ash sampler can be matched with several sets of sampling and sealing seats for use. Investment is rare - it is a substitute production for fixed fly ash samplers-- The problem of sampling fly ash in flue gas ducts has been solved, enabling power plants to accurately monitor the carbon content of fly ash, thereby improving the economic efficiency of boiler operation. Provide reliable basis for scientific calculation of boiler heat rate.

Working process of fly ash sampler:

After the smoke flow enters the sampling nozzle, it passes through the sampling tube and enters the cyclone separator in the tangential direction along the wall. It then rotates up and down along the wall. During the rotation process, the fly ash is thrown onto the wall due to the inertia of force, and falls into the ash collection hopper along the wall through force, entering the sampling bottle. The gas is discharged through the outlet pipe.

When the flue gas flow rate is within the range of 6m/s to 14m/s, the constant velocity sampling rate is greater than 95%, and the sampler can also be powered by an air pump, which can operate intermittently. Within the range of unit load of 70~/F, it has the function of constant velocity adjustment. Reliable operation, convenient operation, and requires human maintenance.

Note:

(1) Fly ash sampler - generally installed on the flue of the air preheater. If the flue width is greater than 2m, two samplers should be symmetrically installed on the flue. If the width is less than 2m, only one sampler should be installed.

(2) The pipe joints used for connection type transition are all equipped with water heating equipment, and some movable joints should be added between them for easy disassembly and assembly, while minimizing the number of welded parts.

(3) Connection welding requirements - closed.

Instructions for operating the fly ash sampler:

1. Open valve A and ensure that parts 7 and 8 are connected and closed. Adjust the valve opening to ensure that the water level inside the U-shaped pipe is equal, and start sampling.

2. After sampling for 5-10 minutes, close valve A, unscrew sample bottle O, and send it to the analysis room for analysis.

3. After each sample is taken, open valve A again to extract for 5 minutes to remove any accumulated dust in the sampling tube (compressed air can also be used for blowing).

If the sampling tube is blocked, blow it with compressed air.

Installation instructions for fly ash sampler:

1. Drill a hole in the flue and insert the sampling tube into the flue, with the sampling head facing the direction of smoke flow. (Depending on the situation, the manufacturer can provide their own anti wear sleeve)

2. Weld the sealing flange to the flue and weld it to the sampling tube to ensure sealing.

3. Connect the sampling tube to the cyclone collector with a nut, and connect the pressure measuring tube to the U-shaped tube with a silicone tube.

4. Connect the cyclone collector to the outlet pipe and valve, and then use a conduit to connect the sampling system to a certain position behind the baffle plate of the induced draft fan (i.e. open a hole here and weld the conduit).

5. Insulate the fly ash sampling system (outside the flue) and the entire collector to prevent condensation and blockage of the pipeline after sampling.

-Special specifications can be arranged separately according to user needs for design schemes! Interested parties contact us!

Technical parameters of portable constant velocity ash powder sampler device:

◆ Scope of application: Sampling of flue fly ash

◆ Air flow velocity inside the pipeline: 6-14m/s

◆ Sampling gun specification: 1500 (1500-2000 optional) ×φ 27mm

Sampling aperture: φ 10mm

Sampling time: 2-3 minutes per time

◆ Pipeline size: 1000-6000mm

◆ Medium: Fly ash

◆ - Quantity: 4.5 kilograms

◆ Separation efficiency of two cyclone separators: 99%

This sampling device needs to be equipped with a pipe seat: a ball valve DN40 can be used

Technical parameters of fixed fly ash sampler device:

Instructions for ordering fly ash sampler devices:

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

Note: The above production technical specifications are for reference only and are primarily for international design purposes.