Reverse Air Bag House
- Electrostatic Precipitators
- Reverse Air Bag Houses
- Fabric filters
- Hybrid electro filters
- Flue Gas Desulphurization
- Forced draught cooler
- Scrubbers
- Gas cleaning plants
- Cyclones
- Multiclones
- VOC + Odour removal system
- Dust extraction system
- Fumes extraction system
- Explosion protection devices
- Fans and blowers
- Waste water treatment
- Air to Air Heat Exchanger
Offices
HEADQUARTER
Germany
-
Intensiv Filter Himenviro Technologies GmbH
Neustraße 45 - 49, 42553, Velbert, Deutschland/Germany - +49 20534200990
REGIONAL OFFICE
Great Britain
-
Intensiv Filter Himenviro UK Limited
47, Bath Street WS13BX, Wallsall West Midlands, Great Britain - +44 1922 628893
REGIONAL OFFICE
United Arab Emirates
-
Intensive Filter Himenviro Technologies FZE – LLC
Business Centre, Sharjah Publishing City Free Zone, Sharjah, UAE - +971-556074697
REGIONAL OFFICE
India
-
Intensiv-Filter Himenviro Private Limited
D-247/11, Sector-63, Noida - 201301, Uttar Pradesh, India - +91-120-4642-500
REGIONAL OFFICE
India
-
Intensiv-Filter Himenviro Private Limited
D-247/11, Sector-63, Noida - 201301, Uttar Pradesh, India - +91-120-4642-500
REGIONAL OFFICE
India
-
Intensiv-Filter Himenviro Private Limited
D-247/11, Sector-63, Noida - 201301, Uttar Pradesh, India - +91-120-4642-500
Reverse Air Bag House
Intensiv Filter Himenviro has a significant amount of operating experience with large reverse gas type fabric filters for Cement Kiln and Ferroalloys Furnace lime kilns and metallurgical processes. The Reverse Air Bag House (RABH) is a custom-built filter, designed for cleaning gases with typically high flow rates and high temperatures.
HIMENVIRO RABH has been designed to clean emissions from various industrial processes and handle a wide range of gas volumes from 50,000 m3/hr. to more than 15,00,000 M3/hr. Depending upon the duct characteristics, HIMENVIRO offers the most economical and efficient cleaning method to minimize pressure drop across the bag house.
The typical HIMENVIRO RABH is modular in construction, the modules being set in pairs, this construction and operation of the units not only offer control on velocity profiles but also facilitate on-line maintenance. Each module can be isolated for inspection or maintenance by closing the inlet, outlet, and reverse air damper, while other modules are in operation. The units – being custom built and voluminous – are dispatched knocked to structural panels.
Reverse Air (R/A) Baghouses (aka Reverse Gas)
In reverse-air baghouses, the bags are fastened onto a cell plate at the bottom of the baghouse and suspended from an adjustable hanger frame at the top. Dirty gas flow normally enters the baghouse and passes through the bag from the inside, and the dust collects on the inside of the bags.
Reverse-air baghouses are compartmentalized to allow continuous operation. Before a cleaning cycle begins, filtration is stopped in the compartment to be cleaned. Bags are cleaned by injecting clean air into the dust collector in a reverse direction, which pressurizes the compartment. The pressure makes the bags collapse partially, causing the dust cake to crack and fall into the hopper below. At the end of the cleaning cycle, reverse airflow is discontinued, and the compartment is returned to the mainstream.
The flow of the dirty gas helps maintain the shape of the bag. However, to prevent total collapse and fabric chafing during the cleaning cycle, rigid rings are sewn into the bags at intervals.
Space requirements for a reverse-air baghouse are comparable to those of a shaker baghouse; however, maintenance needs are somewhat greater.
In many industrial plants, the particulate matter created in the industrial process is carried as dust in the hot exhaust gases. These dust-laden gases pass through an electrostatic precipitator that collects most of the dust. Cleaned gas then passes out of the precipitator and through a stack to the atmosphere. Precipitators typically collect 99.9% or more of the dust from the gas stream.
Pulse Jet Baghouses (aka Reverse Jet)
In reverse-pulse-jet baghouses, individual bags are supported by a metal cage (filter cage), which is fastened onto a cell plate at the top of the baghouse. Dirty gas enters from the bottom of the baghouse and flows from outside to inside the bags. The metal cage prevents collapse of the bag.
Bags are cleaned by a short burst of compressed air injected through a common manifold over a row of bags. The compressed air is accelerated by aventuri nozzle mounted at the reverse-jet baghouse top of the bag. Since the duration of the compressed-air burst is short (0.1s), it acts as a rapidly moving air bubble, traveling through the entire length of the bag and causing the bag surfaces to flex. This flexing of the bags breaks the dust cake, and the dislodged dust falls into a storage hopper below.
Reverse-pulse-jet dust collectors can be operated continuously and cleaned without interruption of flow because the burst of compressed air is very small compared with the total volume of dusty air through the collector. Because of this continuous-cleaning feature, reverse-jet dust collectors are usually not compartmentalised.
The short cleaning cycle of reverse-jet collectors reduces re-circulation and redeposit of dust. These collectors provide more complete cleaning and reconditioning of bags than shaker or reverse-air cleaning methods. Also, the continuous-cleaning feature allows them to operate at higher air-to-cloth ratios, so the space requirements are lower. This cleaning system works with the help of digital sequential timer attached to the fabric filter. this timer indicates the solenoid valve to inject the air to the blow pipe.
Application
Process
Our Services
Case Study
Frequently Asked Questions
1. What is a reverse air baghouse?
A reverse air baghouse is a dust collection system that uses large fabric bags to filter dust from industrial gases. Dirty air enters the bags, and dust particles collect on the inside surfaces. To clean the bags, the system gently blows air in the opposite direction, causing the dust to fall into a hopper for disposal. This method is energy-efficient and extends the life of the filter bags.
2. How does a reverse air baghouse work?
In a reverse air baghouse, dirty air flows into fabric filter bags, trapping dust particles on the inside surfaces. Periodically, a fan blows clean air in the reverse direction through the bags. This reverse airflow causes the bags to collapse slightly, dislodging the accumulated dust, which then falls into a collection hopper below. This cleaning process allows the system to operate continuously without shutting down for maintenance.
3. What are the advantages of using a reverse air baghouse?
Reverse air baghouses offer several benefits, including lower energy consumption due to gentle cleaning methods, longer filter bag life because of reduced mechanical stress, and the ability to handle high temperatures and large gas volumes. These features make them suitable for various industrial applications requiring efficient dust collection.
4. How does a reverse air baghouse differ from a pulse jet baghouse?
While both systems are used for dust collection, they differ in their cleaning methods. A reverse air baghouse uses low-pressure air blown in the reverse direction to clean the filter bags gently, suitable for handling high temperatures and large gas volumes. In contrast, a pulse jet baghouse uses short bursts of compressed air to clean the bags more aggressively, allowing for continuous operation without compartmentalization.
5. What maintenance is required for a reverse air baghouse?
Regular maintenance of a reverse air baghouse includes inspecting and replacing filter bags as needed, ensuring the reverse air fans and cleaning mechanisms function properly, and checking for any leaks or structural issues. Routine maintenance helps maintain optimal performance and extends the system’s lifespan.
6. In which industries are reverse air baghouses commonly used?
Reverse air baghouses are widely used in industries such as cement manufacturing, steel and metal processing, power generation, and chemical production. Their ability to handle high temperatures and large gas volumes makes them suitable for these heavy industrial applications.
7. How energy-efficient are reverse air baghouses?
Reverse air baghouses are designed to be energy-efficient by using low-pressure air for cleaning, which reduces energy consumption compared to systems that require high-pressure compressed air. This efficiency leads to cost savings over time, especially in facilities with continuous operations.
8. Can reverse air baghouses handle high-temperature applications?
Yes, reverse air baghouses are well-suited for high-temperature applications. They are designed to filter hot gases, making them ideal for industries like cement kilns and metallurgical processes where high-temperature gas streams are common.
9. What factors should be considered when selecting a reverse air baghouse?
When selecting a reverse air baghouse, consider factors such as the volume and temperature of the gas stream, the type and size of dust particles, space availability, and compliance with environmental regulations. Consulting with experts like Intensiv Filter Himenviro can help in choosing the right system tailored to specific industrial needs.
10. How does Intensiv Filter Himenviro support reverse air baghouse installations?
Intensiv Filter Himenviro offers comprehensive services for reverse air baghouse installations, including custom design to meet specific industrial requirements, installation support, maintenance services, and the provision of spare parts. Their expertise ensures efficient operation and longevity of the dust collection system.