The dust collector pulse valve has stable functions, good adaptability to load changes, simple operation management, and is particularly suitable for capturing fine and dry dust. The collected dry dust is easy to handle and recycle for reuse. It is applicable to dusty gases with explosion risks or sparks.

Then, when choosing the dust collector pulse valve, the following elements should be considered first:

1. Working environment. When installing the dust collector pulse valve outdoors, the corresponding electrical system should be considered and rainproof measures should be adopted.

If the dust collector pulse valve is installed in an environment with corrosive gases or dust, or near the coast or on a ship, the structural materials and coatings of the dust collector should be carefully selected. The dust collector pulse valve is used in cold areas. When cleaning dust with compressed air or choosing a cylinder-driven switching valve, avoid the moisture in the compressed air freezing to prevent malfunction. Adopt the insulation methods for the dust collector together.

2. Work pressure. Under normal circumstances, the pressure resistance of the dust collector pulse valve is required to be around 5000Pa. When a Roots blower is selected as the power source, the pressure resistance of the dust collector pulse valve housing is required to be 15,000-50000Pa. In a few occasions (such as the purification of blast furnace gas), the required pressure resistance is 100kPA.

3. Dust characteristics. Dust characteristics include particle size distribution, particle shape, density, adhesion, hygroscopicity, electrification and incineration and blasting properties, etc. Fine dust with low bulk density, fibrous dust, dust with strong hygroscopicity and adhesion, and simply charged dust are often difficult to clean, resulting in a decrease in the dust removal power of the dust collector pulse valve and an increase in pressure loss. For the purification of flue gas containing this type of dust, the adoption of the external filter dust collector pulse valve with good ash cleaning effect should be considered, and the filtration air velocity should be appropriately reduced. The key is to select anti-sticking, moisture-resistant and filter materials mainly for surface filtration. Measures should be adopted for the purification of explosive smoke and dust.

4. Dust concentration in flue gas. The dust mass concentration in the flue gas has a significant impact on the pressure loss and cleaning cycle of the dust collector pulse valve, the wear of the filter material and the box body, and the capacity of the ash discharge equipment. When the concentration is too high, pre-dust removal should be set.

5. Equipment resistance. A certain type of dust collector pulse valve has its resistance range. However, when making a selection, appropriate adjustments may need to be made based on factors such as the fan's capacity. At this moment, corresponding adjustments should be made to the filtration air velocity and the ash cleaning cycle.

6. Composition of gases. When considering the presence of flammable, corrosive and toxic gases in the treated body, master the chemical composition of the gases. Under normal circumstances, the dust collector pulse valve can be selected according to the air to be processed.

Regarding flammable gases, such as CO, when they coexist with oxygen, they may form explosive mixtures.

If it is not within the blasting boundary, the dust collector pulse valve can be directly used. However, a structure with high air tightness should be selected, and measures and filter materials with low resistance should be adopted.

If the blasting boundary is reached, an auxiliary incinerator should be set up before entering the dust collector. Only after the gas is incinerated and cooled can it enter the dust collector pulse valve.

For corrosive gases such as sulfur oxide, chlorine and hydrogen chloride, fluorine and hydrogen fluoride, phosphoric acid gas, etc., the selection of filter materials, shell materials and methods should be based on the type of corrosive gas.

The operating temperature of the dust collector pulse valve should be considered based on the long-term operating temperature. To avoid condensation, the flue gas temperature of the dust collector pulse valve should generally be maintained 15-20℃ higher than the dew point. When purifying high-temperature gases with a temperature close to the dew point, the relative humidity of the gas should be reduced by indirect heating or mixing in high-temperature gases, etc.

Regarding high-temperature dust sources, cool the dusty gas to a temperature acceptable to the filter material.

In high-temperature flue gas, there are often many water molecules and SOx. Given the high acid dew point of SOx, special attention should be paid when determining the operating temperature of the dust collector pulse valve at this time. The processing air volume of the dust collector pulse valve meets the requirements of the system planning air volume and takes into account the air leakage coefficient of the pipeline. When the system air volume fluctuates, the dust collector pulse valve should be selected based on the air volume. Regarding high-temperature flue gas, the dust collector pulse valve should be selected by converting the flue gas temperature to the working condition air volume.

The performance of the dust collector pulse valve depends not only on the correct selection of filter bag materials but also on the decisive effect of the dust cleaning system. Therefore, the dust cleaning method is one of the characteristics that distinguish the dust collector pulse valve and also an important part in the operation of the dust collector pulse valve.

The dust collector pulse valve is generally composed of a main unit, filter elements (dust removal bags), and auxiliary systems such as back-blowing control. Among them, the dust removal bag is a component of the dust collector pulse valve. Its raw materials, sewing, application and maintenance are related to the stable operation of the entire system. Factors such as the air volume, dust concentration, load balance, flue gas temperature and humidity, and corrosiveness of the dust removal system may all cause damage and failure of the dust removal bag. Among the various types of damage and failure of dust removal bags, wear is a common type and is closely related to the planning, manufacturing and application of dust collectors.

The dust collector pulse valve filter bag is the filtration component of the dust collector pulse valve, and its cost accounts for approximately 10% to 15% of the equipment cost. The raw materials of the filter bags used for manufacturing the filter bags directly determine various functional parameters of the dust collector pulse valve, such as the specifications of the dust removal equipment, dust removal power, emission concentration, operating resistance, service life and other indicators. Therefore, when planning and applying the dust collector pulse valve, the characteristics of the dusty gas (such as dust concentration, temperature, humidity, acidity and alkalinity) and the characteristics of the dust (such as particle size, viscosity, abrasiveness) should be considered, and the filter bags should be selected correctly and appropriately to meet the requirements of the dust removal equipment.

The dust collector pulse valve is a dust removal device for removing dust pollutants from exhaust gases. Its dust removal mechanism is to filter dust with the dust cake adhering to the surface of the filter material. The outstanding feature is that after the dusty exhaust gas is filtered through the dust collector pulse valve, its emission concentration can generally stably reach below 50mg/m³, and even can reach 5mg/m³. In an environment where environmental protection requirements are getting higher and higher, the dust collector pulse valve has advantages that are difficult to compare with other dust removal methods.

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