Indusco Environmental Services, Inc.

Vertical Packed Bed Scrubbers

The Indusco Environmental packed bed scrubber unit is designed for applications requiring the removal of various types of contaminants from gas streams. Typical applications for contaminant removal include noxious or toxic fumes from chemical processes or odorous fumes from water/sewage treatment and compost facilities. Depending upon each application, scrubbers can be manufactured from specialty metals, fiberglass reinforced plastic (FRP) or thermoplastics. Each scrubber application is individually designed and engineered. Scrubber units are used to help companies comply with emission control for EPA regulations or to preserve the quality of the environment for workers and the community.

To remove the unwanted elements, contaminated air is passed through the scrubber using either positive or negative pressure, created from a fan either upstream or downstream from the scrubber unit. The gas stream enters the scrubber unit near the bottom, travels up through the packed bed section (where the contaminants are actually separated from the gas) where it is vigorously exposed to the scrubber solution, through a demister assembly (to remove the liquid droplets from the exiting gas) and then discharged either to the atmosphere or routed back through the original process.

In order to provide the most economical solution for your off gas needs, the following is taken into account: volume of gas to be treated, type and concentration of contaminants and the required discharge limits. If you do not know the answers to all of these questions, Indusco Environmental engineers will work closely with you to design the system that will best fit your needs.

Venturi Scrubbers

The Indusco Environmental Venturi Scrubber is designed to remove particles, as small as 1 micron, from gas streams. Particulate removal is accomplished by contacting the particulate laden gas stream with a scrubbing liquid, most commonly water. The gas stream is directed through the scrubbing liquid, then through the throat ( a smaller diameter connection between the Venturi and the separator) of the Venturi, then through a cyclonic separator, which creates a significant, designed drop in pressure where the particulate matter is removed from the gas stream. The cleansed gas exits the separator and the liquid is returned to the sump reservoir for recycling. Extremely high particulate removal efficiencies are obtained using this technique.

Due to relatively small number of moving parts, associated with this application, the operation and maintenance costs are low. The spray nozzles are designed to be non-clogging and removable if inspection or replacement becomes necessary. The Venturi is constructed of corrosion resistant material designed for maximum life expectancy. Venturi scrubbers have proven to be effective for removing dust and fume particulate matter in industries suck as fertilizer, pulp and paper, metal finishing and incinerators.

Designing an appropriate Venturi system for your individual process takes several factors into account: air or gas volume required to ventilate the process, particulate make-up, size, concentration and required removal efficiency. Using this information, an appropriate re-circulation rate, pressure drop, and construction material selection can be determined.

Pre-Packaged Modular Scrubber Systems

The Indusco Environmental Services, Inc. MOD3 packed bed scrubber is a skid mounted multi-stage scrubber, designed for applications with airflows ranging from 1,000-24,000 CFM. The unit is fabricated from corrosion resistant Fiberglass Reinforced Plastic (FRP) and consists of three counter-current packed bed sections. The total packed bed depth for the unit is 12-15 feet of packing.

This type of scrubber is ideal for applications where head space is limited and ease of installation is desired. The greatest benefits of the MOD3 are that each stage works with counter-current airflow (which maximizes removal efficiency), has a dedicated recirculation pump (which provides redundancy) and can have unique individual chemistry. The first and second stages can operate on either a shared or individual sumps and the third stage operates on an individual sump. As a option, the third stage sump can be designed to overflow into the first and second stage sumps, in order to maximize chemical usage. The MOD3 is furnished with all recirculation pumps and piping, spray headers, demister, packing media, differential pressure gauges,pH and ORP Transmitters, sump heaters, level transmitters, and any other equipment that may be required pre-installed.

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Crossflow packed bed scrubbers

The Indusco Environmental Crossflow packed bed scrubber unit is designed for applications requiring the removal of various types of contaminants from gas streams.

Typical applications for contaminant removal include noxious or toxic fumes from chemical processes, odorous fumes from water treatment or solid particulate waste (dust) removal from working areas. Scrubbers can be manufactured from specialty metals, fiberglass reinforced plastic (FRP) or polyvinyl chloride (PVC), depending upon each application. Each scrubber application is individually designed and engineered. These units are used to help companies comply with emission control for EPA regulations or to preserve the quality of the environment for workers.

Fume Scrubbers

Indusco environmental Services, Inc. provides only the highest quality scrubber for air pollution control needs. Scrubbers can be constructed from a variety of materials; including fiberglass reinforced plastic (FRP), thermoplastics, carbon and stainless steel as well as more exotic metals such as titanium and hastelloy. Fume scrubbers are designed to remove contaminants from an air stream by using intimate contact between the airstream and a liquid “scrubbing” solution. Typically the airstream enters the scrubber near the bottom and progresses up, counter-currently, through a “packed bed” and is then discharged through the top of the scrubber. Scrubbing liquid is distributed across the top of the packed bed section by either a spray or a distribution trough assembly. The packed bed section is comprised of randomly placed packing material used to disperse the air, as well as, the liquid solution, in order to maximize the amount of air/liquid contact, thus increasing the scrubbing efficiency. A demister is installed near the top, of the scrubber, to remove as much of the liquid from the airstream as possible prior to discharge into the atmosphere. Similar to the vessel itself, internals such as the packing material and the demister are available in a variety of materials of construction.