What is the difference between cartridge filter and bag filter 1

What is the difference between cartridge filter and bag filter?

The difference between filter material and principle

  1. The hard filter material of the filter cartridge or filter bag is folded and arranged to form a cylinder, without skeleton, short, large spacing between the cylinders, thorough dust removal, and no secondary pollution.
  2. The cloth bag is sewn into a filter bag with a soft filter material, which is set on a skeleton welded by steel bars (commonly known as a dragon skeleton). The filter bag is densely clothed. The type of filter material is long polyester fiber and the post-processing material is mostly single layer. Ordinary industrial polyester cloth.
  3. The principle of filtration. The principle of surface filtration: the principle of deep filtration of the filter cartridge dust collector without going deep into the filter material. The dust of the bag filter goes deep into the filter material, and the dust layer is established on the outer surface of the filter material to maintain the dust removal efficiency.

What is the difference between cartridge filter and bag filter 2

Respective advantages and disadvantages 

  1. The advantages of cartridge type dust collector:

Three new: new filter material (waterproof, moisture-proof, wear-resistant and anticorrosive), new structure (hard filter material folding arrangement, no steel frame, no filter material wear phenomenon), new theory (surface filter instead of deep filter dust, no more penetration and filtration Inside)

1) The dust removal efficiency of the surface filter of the cartridge type dust collector is much higher than that of the old type dust collector, which greatly reduces the emission of harmful substances. The air purification index has reached the world advanced level, and completely changed the backwardness of the old type dust collector. status.

2) The cartridge type dust collector has no filter material wear and tear, and there are no moving parts on its body. It can be used for a long time without maintenance (even if the filter cartridge is removed and replaced), it avoids the trouble of constantly changing the filter material of the old type dust collector. Save money, time, effort and no secondary pollution.

3) The volume and weight of the cartridge type dust collector are far smaller than the old type dust collectors of the same specification, which saves civil construction space and civil construction load and saves significant capital construction investment.

4) The cartridge filter has low resistance, low consumption of compressed air and no maintenance workload. Compared with all kinds of old-style dust collectors, it saves energy and saves more than 30% of capital. No enterprise can ignore the significant economic benefits that this energy-saving effect brings to the enterprise.

What is the difference between cartridge filter and bag filter 3

  1. Advantages of bag filter:

 1) It has the characteristics of simple operation, continuous dust removal, stable resistance, high filtration speed, no internal moving parts, and simple design. It is a high-efficiency bag filter.

2) The dust removal efficiency is high, and it can collect dust above 0.1UM, so that the dust-containing gas can be purified to 15mg/m3 or less.

3) Less ancillary equipment, less investment, and lower technical requirements than electric precipitators.

4) It can collect dust that is difficult to recover by electrostatic precipitator, and to a certain extent can collect nitrate, sulfide and other compounds.

5) Good adaptability to load changes, especially suitable for capturing fine and dry dust, and the collected dry dust is easy to process and recycle.

6) The bag filter is safer when collecting explosion hazard or dusty gas with sparks.

  1. Disadvantages of bag filter:

 1) For different types of gases, the corresponding types of cloth bags should be selected, and the cloth bags need to be replaced frequently, which consumes a lot of money.

2) When collecting dusty gas with high humidity, moisturizing measures should be taken to avoid “bagging” due to condensation. Therefore, the bag filter has certain requirements for the humidity of the gas.

3) The resistance is large, and the general pressure loss is 1000-1500PA.

4) For high temperature gas, cooling measures must be adopted.

5) When receiving dusty gas with a large particle diameter, the cloth bag is easier to wear

blast wheel

Wheel parts and hot spots

Wheel Elements:

blast wheel

Hot Spot:

blast wheel 2

Power Requirement of Wheel and Air systems

blast wheel 3

For abrasive flow of 2100 Lbs per minute

  • 21 operators
  • ½” nozzles
  • Compressed air consumption 350ft³/min

per nozzle

  • Compressor power 1400 kW


4 wheels 20 HP each

80 HP (60 KW)

Energy factor 24 !!!


•    Velocity of shot easily controlled through wheel speed.

•    High flow rate of abrasive will provide high production.

•    Economical – one wheel can throw 300 lbs per minute with a 15 HP

wheel equal to five 3/8” nozzles at direct pressure at 80 psi at a

power requirement of 190 HP.

•    Self contained unit does not require a compressor.


•    Can only use metallic media.

•    Can damage delicate parts.

•    Not good for localized peening.

•    Greater abrasive consumption.


Elements of a blast cleaning machine

Five Basic Elements in a Wheelblast Machine

    One or more airless blast wheels propel the abrasive by centrifugal force in a controlled pattern and direction
    A cabinet contains the abrasive material as the wheel performs its cleaning function
    A work handling system presents the work to be cleaned to the abrasive action of the wheel

blasting machine

    An abrasive cleaning and recycling system transports, conditions and cleans the
    abrasive, removing contaminants and fines from the abrasive going back to the wheel
    A dust collector removes all dust contaminants and abrasive fines from the blast  machine environment for a clean and safe operating atmosphere

dust collector








blast wheel

Types of media propulsion

Two main types of media propulsion,Air blast and Wheel blast.

Air blast: Blast media is pressurized in a blast tank and propelled through a nozzle or multiple nozzles

Wheel blast: Propels abrasive by centrifugal force through controlled blast pattern and direction.

blasting effect

blasting effect

blasting effect 1

Initial and final conditions of new steel – significance

Four grades of initial surface condition

Four grades of final finishes (defined by SSPC)


“A“ – Steel surface covered completely with adherent mil  scale: little

or no rust visible (SSPC-Vis-1 – Rust Grade A)

“B“ – Steel surface completely covered with both mil  scale and rust

(SSPC-Vis-1 – Rust Grade B)

“C“ – Steel surface completely covered with rust; little or no pitting

visible (SSPC-Vis-1 – Rust Grade C)

“D“ – Steel surface completely covered with rust; pitting visible (SSPC-Vis-1 – Rust Grade D)


“A“ – Steel surface covered completely with adherent mil scale: little or no rust visible (SSPC-Vis-1 –Rust Grade A)

These are the TWO levels of surface preparation recognized by SSPC in(SSPC-Vis-1 – Rust Grade A):  SP 5 (White Metal)、SP 10 (Near White)

blast effect 2


  • SSPC VIS 1, Guide & Reference Photographs for Steel Surfaces Prepared by Dry Abrasive Blast Cleaning.
  • “B“ – Steel surface completely covered with both mil  scale and rust(SSPC-Vis-1 – Rust Grade B)

These are the FOUR levels of surface preparation recognized by SSPC(SSPC-Vis-1 – Rust Grade B): SP 5 (White Metal)、SP 10 (Near White)、SP 10 (Commercial) 、SP 7 (Brush) .

blasting effect 1

  • “C“ – Steel surface completely covered with rust; little or not pitting visible (SSPC-Vis-89 – Rust Grade C)
  • These are the FOUR levels of surface preparation recognized by SSPC (SSPC-Vis-89 – Rust Grade C) : SP 5 (White Metal)、SP 10 (Near White) 、 SP 10 (Commercial)、SP 7 (Brush)

blast effect 3

  • “D“ – Steel surface completely covered with rust; pitting visible(SSPC-Vis-89 – Rust Grade D)

These are the FOUR levels of surface preparation recognized by SSPC(SSPC-Vis-89 – Rust Grade D): SP 5 (White Metal) 、SP 10 (Near White)、SP 10 (Commercial)、SP 7 (Brush)

blast effect 4

Blast cleaning

Blast cleaning – application basics

Purpose:Remove rust, scale and prepare surface prior to downstream coating

Application:Carried out on most metallic components

Result:Enhances life of coating, cosmetic finish

Process Control:Etching, De-burring & other special processes

Quality/ Measurement:Generally visual to standards or preference

What do you need to know?

Are we blast cleaning or shot peening?

What is the initial condition of the steel component?

What is the final desired outcome?

Has the part ever been shot blasted – if not, did an alternate process work?

Kinetic or Impact Energy  = ½ x mass of abrasive x square of velocity

Robotic abraive blasting on the rise

In recent years, society has witnessed a rise in the use of robotics that has revolutionized countless industries. When it comes to abrasive blasting for surface preparation and finishing, innovative new technologies are relied on increasingly in the manufacturing process. Let’s take a look at what robotic abrasive blasting is and the benefits it can offer your business.


Robotic blasting is a cutting-edge method of cleaning, stripping, preparing and/or finishing metal surfaces safely, precisely and efficiently. An automated blasting system removes the operator from the blasting environment, keeping them out of harm’s way while allowing for continuous operation to maximize uptime and productivity. The remote-controlled system provides for the adjustment of the speed and path of the nozzle, while a dust collector and media reclaimer capture airborne particles and make it possible to recycle blasted abrasives.


From improved quality results and unmatched reliability to enhanced safety and versatility, there are many reasons to choose robotic abrasive blasting. To understand why this modern method is becoming so popular in manufacturing, automotive, industrial painting and coating and many other industries, consider some of the benefits of automated blasting:

  • Improved quality:Using a robotic system allows for consistent surface quality meeting the strict specifications of each unique project. You can eliminate errors due to human oversight and ensure you’re blasting at the proper angle to yield the desired results.
  • Increased productivity:The ability to run continuously with reduced labor requirements helps increase flexibility and ramp up productivity. Robotic abrasive blasting systems can boost your capacity exponentially and speed up processes while improving precision. You can benefit from a faster time to market and a better bottom line.
  • Exceptional durability:Robotic blasting equipment is capable of standing up to the toughest jobs and the most aggressive blasting environments. Units are designed to keep out dust and moisture and withstand impacts for an extended service life.
  • Higher efficiency:Innovative abrasive blasting systems increase product yield and flow while lowering costs related to maintenance, utilities and material loss. The compact size reduces space requirements, while precision robotics eliminate mistakes, re-work and returns.
  • Safer job sites:With automated robotic blasting, you don’t have to worry about workers getting injured or exposed to harmful contaminants, so there’s no additional safety apparel or accessories needed to protect your staff from hazardous exposures.