Boiler dust collector; It is currently a widely used dust removal equipment in industrial dust removal, which treats various industrial dust. Dust cleaning is boiler dust removal
The important links and influencing factors for the normal operation of the device. Through engineering practice, bag filters are used for the treatment of flue gas at the tail of boilers in thermal power plants
It is feasible. It is quite common to use boiler dust collectors on boilers, and the service life of dust removal bags is also very long. Generally
Exceeding 2a, some even reach 6a or more.
Boiler dust collector cleaning method:
a: Gas ash removal: By blowing back the filter bag with high-pressure gas or external atmosphere, the ash deposited on the filter bag is removed. Gas cleaning includes pulse blowing
Dust, blowing dust and inhaling dust.
B. Manual tapping: Each filter bag is manually tapped to remove the ash content from the filter bag.
c. Mechanical vibration cleaning: upper vibration cleaning and middle vibration cleaning (both used for filter bags) are periodically carried out using mechanical vibration devices
Tap each row of filter bags alternately to remove dust from them. Horizontal vibration, usually in the upper part or in the middle. hang down
Vertical vibration can also be achieved by using the high-speed rotation of the eccentric wheel to produce higher frequency vibrations.
.d. Pulse blowing type: using compressed air as the cleaning power, the pulse blowing mechanism releases compressed air in an instant, inducing several times the amount of dust.
The secondary air is injected into the filter bag at high speed, causing the filter bag to swell rapidly. The bag filter relies on impact vibration and reverse airflow to clean the dust.
.e. Nozzle Backblowing for Dust Cleaning: A circular or flat nozzle with a slit is set on the outside of the filter bag and connected to the high-pressure fan pipeline.
. The nozzle is close toThe surface of the filter bag moves back and forth up, down, or left and right, and a high-speed airflow is ejected from the narrow slit facing the surface of the filter cloth, which adheres to the inside of the filter bag.
Dust layer. At this time, the remaining part of the filter bag is still operating at full load, and this cleaning method can keep the dust collector running continuously.
The filter bag materials used in boiler dust collectors include polyester, nylon, polypropylene, acrylic fiber, glass fiber, and polyamide fiber.
1. The heat-resistant temperature of polyester in boiler dust collectors can reach 135 ℃, but its alkali resistance is poor;
2. Nylon has a heat resistance temperature of 100-110 ℃ and high strength;
3. Polypropylene has a heat resistance temperature of around 100 ℃ and can corrode,
4. Acrylic fiber has a heat resistance temperature of 145 ℃ and good chemical properties such as acid resistance;
5. Glass fiber has a heat resistance temperature of 250 ℃, good acid resistance, but poor alkali resistance;
6. Polyamide heat-resistant filter bags can withstand temperatures up to 220 ℃ and have good acid and alkali resistance.
7. Polyester needle punched felt can withstand 130-150 ℃ and is suitable for industries such as steel plants, cement plants, and coal mines.
.8. Three proof polyester needle punched felt is suitable for steel plant blast furnace coal powder injection, cement plant, power plant coal transportation system, etc.
9. Polyester is suitable for dust collection systems in flour mills, chemical plants, coal mines, and cement plants.
.10. Suitable for cement plants, chemical plants, flour mills, woodworking furniture factories, etc
11. Acrylic needle felt is suitable for waste incineration, asphalt, spray dryer, coal mill, power plant, etc.
12. Fangster needle punched felt is suitable for rotary kiln head and tail in cement plants, asphalt mixing, blast furnace gas, casting plants, etc.
13. PTFE needle punched felt is suitable for complex working conditions such as chemical engineering, waste incineration, and liquid filtration.
.14. PPS needle punched felt is suitable for dust collection and treatment of coal-fired boilers, garbage incinerators, and power plant fly ash.
15. P84 needle punched felt is suitable for coal-fired boilers, liquid bed boilers, garbage incineration, asphalt plants, cement plants, waste incinerators, etc.
16. Fumes is suitable for steel, smelting, ferroalloys, chemicals, cement, calcium carbide, waste incineration, electricity, asphalt mixing, etc.
17. Metas is suitable for asphalt, cement, steel, non-ferrous metals, lime, dust, metallurgy, plastics, carbon black, coke, and tobacco
and other industries.
18. Fiberglass needle punched felt is suitable for high-temperature flue gas industries such as steel, metallurgy, carbon black, power generation, cement, and chemical industry.
