What is a Pulse Jet Bag Filter?

A pulse jet bag filter also called a pulse jet baghouse or pulse jet dust collector is a self-cleaning dry filtration system. The pulse jet dust collector cleaning system removes particulate matter and dust from the surface of internal filter media with bursts of compressed air. Pulse jet bag filters are the most common type of particulate air pollution control equipment found in workplaces including factories, plants, warehouses and other industrial or commercial environments, to meet workplace air quality safety requirements and comply with EPA requirements for emissions.

CPE Filters, Inc. designs and manufactures pulse jet bag filter systems and custom components for a wide variety of industrial environments. The pulse jet dust collector contains no moving parts, thus offering reliable continuous operations along with superior filtration efficiency, engineered to effectively collect and remove potentially harmful particulate matter gas fumes that would otherwise enter the work environment or atmosphere. The popularity of the pulse jet style of dust collector is due to its ease of operation, low energy usage, and minimal maintenance requirements.

Pulse jet bag filters get their name from the short bursts or “pulses” of compressed air used to clean the bag or filter. In the pulse jet system, the dust is collected on the external surface of the bag/filter where it commonly forms into a cake of dust. Either on a timed basis or based on pressure drop when the dust cake is at an appropriate thickness, a controller activates a sequential pulse of compressed air into the interior of the filter bags, one (or more) row(s) at a time, knocking the dust and dust cake free of the filter to fall via gravity into the hopper for removal. The mechanics of the compressed air pulse and associated induced draft of additional air through a venturi nozzle create a shock wave and ripple effect on filter bags which enhances the mechanical force of the initial blast of compressed air itself, to dislodge the dust particles off the fabric.

Advantages
Pulse jet filtration systems offer several advantages over other types of dust collection systems. The fundamental advantage is in the pulse jet’s ability to clean on-line. The duration of the pulse of compressed air is typically in the range of 100 to 200 microseconds, effectively facilitating 24/7 operations without interruption to the ventilation of dusty air, and no shut-down period to clean the bag filters.

The pulse jet collector is incredibly versatile in terms of the range of temperatures, pressures, and gas stream chemistries with which it finds application. CPE Filters’ pulse jet dust collectors are offered in a broad range of designs with either a top or bottom/side bag loading configuration, cylindrical or square/rectangular housing style, and a wide range of filter media options, both bag type and pleated media. Pulse-jet dust collectors may be fabricated from a wide selection of metals—carbon steel, stainless steel, aluminum, or special alloys like Inconel and Hastelloy—to meet the specific needs of any manufacturing environment, ranging from chemical compatibility to abrasion resistance to food-grade or FDA requirements.

High collection efficiency serves to solidify the position of most installations for pulse jet bag filters as the most used dust collector in industry. Manufacturing environments such as chemical and mineral processing plants, grain mills, food processing plants, steel mills, metalworking and fabrication shops, asphalt plants and many other industries all benefit from pulse jet bag filters to maintain air quality and meet EPA safety standards.