As a filter material widely used in the field of industrial dust removal, polyester needle felt has become the preferred material for dust removal systems under normal and medium temperature conditions due to its excellent performance and high cost performance. Understanding the working conditions suitable for polyester needle felt will help to reasonably select filter bags and ensure the efficient and stable operation of the dust removal system. This article will introduce in detail the working conditions and performance of polyester needle felt.
1. Normal to medium temperature dust removal environment
The temperature resistance range of polyester needle felt is generally -40℃ to 120℃, and it can withstand a high temperature of up to 150℃ for a short time. Therefore, it is very suitable for filtering normal and medium temperature dust. Mainly including:
Cement industry
The cement dust generated during the production process has a small particle size and the temperature is generally between normal temperature and 100℃. Polyester needle felt is wear-resistant and has good filtering effect. It is a commonly used filter material for cement plant dust removal systems.
Steel industry
During the steel smelting and rolling process, the flue gas temperature and dust concentration are moderate. Polyester needle felt filter bags can withstand mechanical shock and vibration and maintain good filtering performance.
Power industry
The flue gas dust emitted by the boiler of the thermal power plant is generally high in temperature but mostly controlled within the temperature resistance range of polyester. The use of polyester needle felt dust collector filter bags can effectively remove dust and meet environmental emission requirements.
Grain processing and food industry
Grain dust is mostly organic powder with moderate humidity and low temperature. Polyester needle felt has good wear resistance and filtration efficiency, which can effectively reduce dust emission.
2. Dry, non-corrosive dust environment
Polyester needle felt has limited acid and alkali resistance and is not suitable for highly corrosive gas environments, but is particularly suitable for dry, non-corrosive dust environments, such as:
Mining and building materials industry
Mineral powder, sand and gravel and other granular dust are mostly dry neutral dust. Polyester needle felt has good wear resistance and structural stability, which is suitable for long-term operation.
Mechanical processing industry
Metal dust, cutting chips, etc. generated by mechanical processing are all dry dust, and polyester needle felt can meet the needs of high-efficiency filtration.
3. Low humidity environment
Polyester needle felt has limited tolerance to moisture. It is easy to absorb moisture and expand in high humidity environment, which reduces the filtration efficiency and even causes clogging. Therefore, polyester needle felt is more suitable for environments with lower humidity:
Industrial environment with good ventilation and low water content
For example, in drying workshops and storage areas, polyester needle felt can be used stably for a long time.
4. Moderate requirements for dust properties
Polyester needle felt is suitable for working conditions with low dust adhesion and uniform particle size, but not suitable for dust containing grease, more oil smoke, and easy to agglomerate:
Not suitable for oily or high-viscosity dust environment
Such as grease dust in food processing and sticky dust in some chemical industries, it is easy to cause the filter bag to "stick", affecting the cleaning effect.
Special working conditions requiring film treatment
If you encounter oily and sticky dust, it is recommended to use polyester film-coated needle felt to enhance the anti-sticking performance and cleaning efficiency.
5. Working conditions with pulse jet cleaning system
Polyester needle felt filter bags have a compact structure and are suitable for pulse jet cleaning:
Dust collectors suitable for pulse cleaning
Use compressed air to intermittently impact the filter bag to remove attached dust and maintain the permeability and filtration efficiency of the filter bag.
Working conditions that require frequent cleaning but not excessive impact
Polyester needle felt has good mechanical strength and can withstand a certain degree of cleaning impact, but the cleaning parameters need to be reasonably adjusted to extend the life of the filter bag.
6. Conventional working conditions with economic priority
Polyester needle felt has a moderate price, mature technology, many production plants, and a short supply cycle. It is suitable for most companies as a conventional filter material:
High cost performance
Meet the requirements of most dust removal conditions for filter bag performance and life, and have good comprehensive economic benefits.
Easy to replace and maintain
The market supply is sufficient and the maintenance cost is low.
7. Summary
The working conditions and environments suitable for polyester needle felt mainly include:
Temperature range: room temperature to 120℃, short-term 150℃
Dust characteristics: dry, non-corrosive, medium and low viscosity dust.
Humidity conditions: low humidity environment is preferred.
Cleaning method: suitable for pulse jet cleaning system.
Industry applications: cement, steel, electricity, grain processing, mining, building materials and other industries.
Economic performance: medium price, high cost performance, easy maintenance.
For special working conditions such as high temperature, high corrosion, high humidity, oily sticky dust and other environments, although polyester needle felt has certain limitations, it can be met by surface coating or selection of other high-performance filter materials.
In short, polyester needle felt has become the main filter material of industrial normal temperature dust removal system with its excellent comprehensive performance. It is suitable for most normal temperature to medium temperature and non-corrosive dust removal environments, and widely guarantees the environmental protection standards of industrial production and the stable operation of equipment.