Features

• Air flow rate from 50 to 30000 CFM
• Material of construction: PP, PP+FRP, MS, SS 304, SS 316
• Scrubbing efficiency up to 99 %Lower shell serves as integral sump for recycle of liquid
• Spray nozzles accessible from top of unit
• Entrainment separators prevent liquid carryover
• Special multi-bed packing designs accommodate different scrubbing solutions for removal of multiple contaminants

Mechanism

Plastic extrusion fume scrubber

• Drizgas Tech is one of leading manufacturer of plastic extrusion fume scrubber in India. We provide highly efficient, top-quality Scrubber systembuilt around your precise requirements. 
• Plastic fumes can pose severe occupational hazards due to the wide variety of byproducts or additives released into the air during the manufacturing, processing, heat treatment, and burning of plastics.
• To form plastics, industrial machinery uses heat or pressure to mold and shape plastics from granules, powders, or pellets of plastic resins.
• According to the EPA, plastic fumes mainly emit from the manufacturing equipment used to produce the final product including the extruder hopper, die head, sander, injection molding machine, and more.
• During these processes, the heating and melting of plastic resins cause chemical reactions exposing liquid solvents and additive fumes to the atmosphere. Likewise, plastic manufacturing such as injection molding machines, require purging to remove residual resins from the machine. This process involves high temperatures to melt the plastic and purging agents, thus, releasing smoke and plastic fumes.

Health hazards

Plastics are usually processed as pellets, granules or powders. These include additives such as fillers, pigments, fire retardants and stabilisers, depending upon requirements. Plastics fume, produced when the material is heated in processing, can include respiratory sensitizers, irritants and carcinogens. The exact composition of any fume varies. Immediate effects may include severe irritation to the eyes, nose and lungs. In some cases, the effects can be long term and irreversible.

Examples of commonly processed plastics and constituents in fume

Plastic                                     Constituents in fume                

PVC Hydrogen                         Chloride

Fire-retarded ABS                   Styrene, phenol, butadiene

Polypropylene                        Formaldehyde, acrolein, acetone Acetals Formaldehyde

Polyethylene (low density)     Butane, other alkanes, alkenes

Polystyrene                             Styrene, aldehydes

Plastic Fume Control Solutions

• To prevent health effects from the inhalation of plastic fumes, employers should monitor workplace air levels and implement engineering safety controls to prevent exposure.
• Drizgas Tech wet packed bed scrubber system capture plastic fumes at the source before it enters the operator’s breathing zone. These types of systems should be placed nearby operations that melt or burn plastic. To remove ambient plastic fumes, free-hanging room air cleaners provide added protection for nearby employees and improve general workshop air quality.
• These workers commonly come into contact with chemical fumes that are emitted during raw material manufacturing and plastics processing. As plastics come in the form of granules, powders or pellets, there are certain ways to mold or shape these materials into products. For the plastics manufacturing process, the material has heat or pressure appliedto the plastic or the plastic resins are combined with additives, including fillers and pigments, according to Health and Safety Executive.
• The level of fume exposure during the process varies but it is usually dependent on the type of operating procedure and the material that is being produced.
• Workers may find themselves exposed to different kinds of fumes during plastics processing, including hydrogen chloride from PVC plastic and formaldehyde from acetals. When heat is applied to it, pure PVC breaks down to form hydrochloric acid gas. Fumes from plastics can irritate the lungs and are even thought to be cancer-causing.
• 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.

Recommended approaches for controlling plastic fumes

• Source Capture.Whenever possible, capturing the mist, dust and fume at the source is the recommended approach for controlling plastic fume and dust emissions. Source capture typically involves utilizing canopy hoods with clear, plastic drop curtains or guards with flexible ducting to contain the majority of fumes at or near the generation source to protect the worker and prevent the fume from migrating elsewhere in the facility.
• Local Containment.Containment isolates the process from the rest of facility and protects the contained area. An example would be a partitioned area kept under negative pressure such as a cross draft booth where one side of the booth is configured as a hood that extracts the contaminants horizontally across the booth. The extracted air can either be ducted to a dust collector located remotely or drawn directly into a collector that incorporates a hood.

Advantages

• Reduces pollution and follow the compliance of the Pollution Control Board.
• Easy operation so trained operator is not required.