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Design requirements and debugging operation rules for single machine dust collectors

Source: Official website   |   Date:2019-11-16

Single machine dust collectorIt is a new type of high-efficiency dust collector that introduces new equipment and technologies from abroad and improves them through digestion. It has the advantages of high purification efficiency, low wear of filter bags, long service life, and convenient maintenance. Suitable for industrial air pollution enterprises such as steel smelting, metallurgy, chemical industry, electronics, building materials, cement industry, musical instrument processing, carbon processing, mechanical processing, various industrial electric furnaces and kilns, asphalt concrete mixing plants, mining, casting, electricity, rubber, grain processing, military industry, ceramics, light industry, various dryers, non-metallic mineral fine powder deep processing fields, sandblasting, refractory materials, etc.

The basic structure of a single machine dust collector consists of three parts: a fan, a filter, and a dust collector. Each component is installed in a vertical frame with a steel plate shell, which has a beautiful appearance, scientific structure, reliable operation, and convenient use.

The product is widely used for dust removal in industries such as casting, ceramics, glass, refractory materials, cement building materials, sand fiber manufacturing, chemical products, and mechanical processing. This product has a good dust removal effect compared to heavy metal chips, casting sand such as lathes, grinders, milling machines, grinding machines, polishing machines, etc., as well as medium density dust such as cement, ceramic powder, gypsum powder, carbon powder, pigments, gluewood powder, plastic powder, etc., as well as light density non fibrous dust. The dust removal efficiency of this unit is more than 99.5%.

The reasonable design of a single unit dust collector needs to meet the requirements analysis, and the design of a high-quality single unit dust collector needs to be considered in the following four aspects:

l、 Calculated based on the amount of gas processed:

The amount of gas processed is the decisive factor in determining the size and type of dust collector. For large gas volumes, it is necessary to choose a dust collector that can handle large gas volumes. If multiple dust collectors that handle small gas volumes are used in parallel, it is often uneconomical; Which type of dust collector should be used more economically and easily to meet the environmental requirements of dust source control and dust emissions for smaller gas volumes.

2. Calculated based on the dispersion and density of dust:

The dispersion of dust has a significant impact on the performance of dust collectors, and the same dispersion of dust can also vary due to different operating conditions. Therefore, when choosing the type of dust collector, the first thing is to accurately grasp the dispersion of dust, such as choosing a cyclone dust collector when the particle size is more than 10 μ m. If the particle size is mostly several micrometers or less, electrostatic precipitators and bag filters should be selected. The specific selection can be based on dispersion and other requirements, referring to the commonly used dust collector types and performance table for preliminary selection; Then determine the type and performance of the dust collector according to other conditions and the introduction.

3. Calculated based on gas dust concentration:

For a single machine dust collector, the higher the import dust concentration, the higher the dust removal efficiency. However, this will also increase the export dust concentration. Therefore, it cannot be simply assumed that the dust treatment effect is good based on the high dust removal efficiency, especially at higher initial concentrations. Continuous ash cleaning, pressure loss, and emission concentration can also meet environmental requirements. The initial concentration of the dust collector is below 30g/m3, and it can be used without a pre dust collector.

4. The impact of dust adhesion on selection:

The adhesion mechanism between dust and walls is closely related to the specific surface area and moisture content of dust. The smaller the dust particle size d, the larger the specific surface area, the more water content, and the greater its adhesion.

Operating Procedures for Single Machine Dust Collector Debugging

1、 Debugging rules for single machine dust collector:

1. The single machine test run should evaluate the single machine function in a no-load state (if necessary, cut off the connection with the dust removal system).

2. Adopt practical means to scientifically evaluate the quality of single machine installation, including: the installation method should comply with the design and regulatory requirements, and meet the needs of the host; The operating parameters (voltage, current, revolutions per minute, vibration frequency) comply with the design specifications; No abnormal sounds such as periodic jamming and continuous heating during single machine operation; The single machine test run time shall not be less than 4 hours; It is certain that the standalone dust collector has the conditions for individual operation.

2、 Debugging content of single machine dust collector:

The host usually refers to a pulse dust collector, accessory devices, and ventilation fan with a complex structure composed of multiple components. Auxiliary equipment refers to mechanical equipment that is matched to improve the functions of the host, including:

1. Dust output facilities, including: star unloaders, screw conveyors, buried scraper conveyors, and dust reuse equipment, etc;

2. The vibration cleaning device, pulse cleaning device, rotary back blowing cleaning device, ash hopper vibration device, etc. of the bag filter;

3. Compressed air and pressure measuring device;

4. Other related equipment and control display instruments;

3、 Summary of debugging results for single machine dust collector:

1. The debugging process should be complete and accurate, and debugging records should be kept. Debugging records should include: name, specifications and models of individual equipment, performance indicators (voltage, current, revolutions), operating performance, debugging conclusions, signature of the debugging personnel, and debugging date.

2. The debugging conclusion should also record different opinions;

3. The debugging records are included in the equipment installation file.

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