Food Processing Industry
Contaminants within food processing applications can generally be grouped into two categories: dusts generated when handling dry, bulk materials or wet emissions such as grease or smoke resulting from cooking emissions. These applications can be addressed with Electrostatic Precipitators, Cartridge Collectors, Shaker Dust Collectors or Baghouses.
Metalworking and Grinding Industry
Contaminants generated from metal grinding may consist of surface coatings present on the component, the base material being worked and the abrasives or materials from the tool. The particulate size distribution is very broad due to the variety of materials included in the process and is generally between 1-20 µm. The particulate may be abrasive and pose a combustion or explosion hazard. Contaminants from machining processes can be oil mists, dusts, fine grit, fibers, coolant smoke and much more. These applications can be addressed with Electrostatic Precipitators, Cartridge Collectors, Shaker Dust Collectors or Baghouses.
Plastics Processing Industry
Contaminants from plastic processing applications can produce wet mists, fumes and dust from extrusion and molding processes as well as dry contaminants on machining applications. These applications can be addressed with Conveyor Collectors, Cartridge Collectors, Shaker Dust Collectors or Baghouses.
Contaminants from pharmaceutical processes are generally very fine, dry, light particulate that becomes airborne with little air movement. Contaminant is generated while the product is being conveyed or loaded with the displaced volume carrying the dust allowing it to become airborne. The size, process, speed and material properties will impact the dust characteristics and generation rates. In certain pharmaceutical applications, some of the dusts may be agglomerative or hygroscopic. These applications can be addressed with Conveyor Collectors, Cartridge Collectors, Shaker Dust Collectors or Baghouses.
Contaminant characteristics of wood dust vary greatly depending upon the composition and species of the material and the process creating the dust. Planing, sawing, routing, milling, sanding and turning are processes used throughout many commercial, industrial and institutional facilities. Size of particle can vary according to process and most saw dusts and chips can create an explosive atmosphere as well as health hazards to the employees. These applications can be addressed with Conveyor Collectors, Cartridge Collectors, Cyclones, Shaker Dust Collectors, or Baghouses.
CNC Machining Industry
Contaminants from CNC machining processes fall into three broad categories:
- Metalworking Mist and Smoke – When coolants and lubricants are applied to machining processes, the generated force and heat creates mist and smoke. The type of contaminant depends on what coolants are being used and the machining parameters. Water-soluble coolants produce a mist with larger droplet sizes where straight oils produce more of a smoke that can be submicron in size. Higher speed machines or processes that generate a large amount of heat will produce higher concentrations of contaminants.
- Dry Machining Dusts – Dry machining will produce contaminants from the material being machined and the process heat. The contaminant will generally be a mix of larger particles from the displaced material and finer dust particles from the machining process. The properties of the material being cut, type of machining process, cutting rate, and the hours of operation affect the contaminant generation rates and contaminant size.
- Plastic Fumes – When plastic materials are processed, there is often a plasticizer contaminant that is emitted. This can happen during extrusion due to coatings or residuals left on a die or mold. They are generally submicronic smoke contaminants that are tacky or sticky. These emissions are harmful to workers who can breathe in the hazardous particles during operation of the machine if the smoke is not properly captured and controlled.
The fume and by-products generated during welding processes are small in size, with over 90% being less than 1.0 µm, making the fume challenging to capture and more hazardous to exposed workers. The fume consists of a complex mixture of metals and metallic oxides originating primarily from the filler metal but can also include the base metal and surface contaminants such as dirt, scale or lubricants. The fume can include materials such as aluminum, antimony, arsenic, beryllium, cadmium, copper, chromium, cobalt, copper, iron, lead, manganese, molybdenum, nickel, silver, tin, titanium, vanadium, zinc and others. The fume also consists of shielding and process-generated gases. These applications can be addressed with Down Draft Tables, Portable Collector units, Cross Draft Collector Systems or Cartridge Collectors.
Plasma & Laser Cutting Industry
The fume generation rates from plasma and laser cutting will vary with the process parameters such as cut rates, total cutting time and material thickness. Additionally the cutting consumables, surface coatings, base metals or any other contaminants present within the atmosphere will also be part of the fume make-up. However, without proper filtration and / or other dust collection measures the fume and smoke generation can be significant. In plasma cutting the vast majority of the particulate can be less than 10.0 microns in size whereas in laser cutting a high concentration of the particulates can be less than 1.0 micron in size. In both cases, the fume or particulate is considered to be fine and somewhat agglomerative when allowed to cool. These applications can be addressed with Down Draft Tables, Portable Collector units, Cross Draft Collector Systems or Cartridge Collectors.
Contaminants from Cement manufacturing can vary from fine to heavy particulates. Some hazards to worker safety by inhalation are present. Build up on equipment which can lead to equipment failure are also common. These applications can be addressed with Down Draft Tables, Portable Collector units, Conveyor Collection Systems, Cyclones and Cartridge Collectors.
Powder Paint Industry
Contaminants from powder painting processes range from medium to light, fine particulates and fumes. Some contaminants may be hygroscopic or agglomerative when exposed to moisture. These applications can be addressed with Cartridge Collectors, Portable Collector units, Cross Draft Collectors and Down Draft Tables.
Die Casting Industry
Contaminants from chemical processes range from large heavy to light fine particulates, liquid mists and fumes. Collected material may have reactivity with the collection equipment materials. Some contaminants may be hygroscopic or agglomerative when exposed to moisture. Process contaminants can present additional challenges including hazardous effects on workers, material value, chemical reclamation and spent chemical disposal.
Abrasive Blasting Industry
Contaminants caused by abrasive blasting generates large amounts of dust that includes the blasting materials, the base material or the working piece, and any surface coatings such as paint that may be present. The broad nature of materials and parts commonly used in abrasive blasting leads to a wide variety of contaminants that can be hazardous when inhaled by workers. Additional hazards such as collecting the combustible or explosive material that results from the blasting process must also be considered. These applications can be addressed with Cartridge Collectors, Portable Collector units, Cross Draft Collectors and Down Draft Tables.