Industries

Volatile organic compound (VOC) and particulate matter (PM) emissions are emitted from asphalt shingle production. Fiber filters and thermal oxidizers control emissions. NESTEC is experienced in supplying filtration and oxidizer systems for asphalt production.

Emissions from impregnation lines, engine casting foundries, engine test facilities, and coating and paint spray booths have been treated by regenerative thermal oxidizers (RTOs) designed to handle high volumetric flowrates. NESTEC has RTO project experience in the U.S., Mexico, South America, and Europe for several major truck and automobile manufacturers.

Bakery dryers and ovens emit odors, particulate matter (PM) and volatile organic compounds (VOCs). Fiber filters, wet scrubbers, wet electrostatic precipitators (wet ESPs / WESPs), regenerative thermal oxidizers (RTOs) and/or regenerative catalytic oxidizers (RCOs) control emissions. NESTEC has extensive experience with bakery applications.

NESTEC has supplied multiple wet electrostatic precipitators (wet ESPs / WESPs), to remove blue haze from industrial processes such as ammonium sulfate fume, sulfuric acid mist (SAM), condensed organics, smoking, drying, and frying applications. Wet ESPs are well suited for these applications because of their capability of removing submicron particulate matter including particles that are sticky and combustible.

Many coatings and paints still contain volatile organic compounds (VOCs) in their formulations. Applied in a liquid state, coating and paint films must be dried, typically in direct-fired ovens and dryers operating at temperatures from 150°F to 600°F. NESTEC has designed many high-temperature ducting systems to convey the exhaust streams to regenerative thermal oxidizers (RTOs). Various heat recovery systems have also been employed to reduce operating costs for these VOC-rich processes, including waste heat boilers, return-to-process make-up air streams, and building heat with air-to-air heat exchangers. Industries served include coil coating, beverage and food containers, automotive paint shops, medical products, and resilient flooring, among others.

Products of composite and carbon-fiber manufacturing processes contain resin formulations that emit volatile organic compounds (VOCs) upon mixing, heating, and curing. The NESTEC team has extensive experience in regenerative thermal oxidizer (RTO) systems to control these emissions.

NMP (n-methyl-pyrrolidone) is used in lithium-ion battery manufacturing for electric vehicles. It is an expensive solvent that produces emissions that must be controlled. Due to the material high cost, recovery of the NMP is desirable and achieved utilizing an NMP scrubber system that can separate the NMP from the emissions stream and be sent on for further refinement. NESTEC has supplied NMP scrubber recovery systems to major North America battery producers.

Volatile organic compounds (VOCs) and carbon monoxide (CO) byproducts of the fermentation processes often require thermal oxidation. Regenerative thermal oxidizers (RTOs) have been successfully used to treat emissions from vents and grain dryers; NESTEC is experienced within the ethanol industry and has several RTO installations at ethanol facilities. Wet electrostatic precipitators (wet ESP / WESP) are often used on these dryers as well for particulate matter (PM) control to protect downstream RTO ceramic heat recovery media from plugging.

Industrial fryers and dryers used in industrial potato and french fry production emit odor, particulate matter (PM) and volatile organic compounds (VOCs). Industrial meat smoking applications and industrial soy sauce plants produce particulate matter and blue haze emissions from their production processes. NESTEC has extensive experience with wet electrostatic precipitator (wet ESP / WESP) and regenerative thermal oxidizer (RTO) systems servicing emissions within the food processing industry.

Mineral wool and fiberglass insulation manufacturing forming lines and curing ovens emit particulate matter (PM) and volatile organic compounds (VOCs). NESTEC has extensive experience with applying regenerative thermal oxidizer (RTO) and wet electrostatic precipitator (wet ESP / WESP) systems in the insulation manufacturing industry.

Volatile organic compound (VOC) emissions come from ovens are treated with regenerative thermal oxidizers (RTOs) and concentrator systems. NESTEC is experienced in supplying RTO and concentrator systems for food and beverage containers with several large-scale installations.

Odor, particulate matter (PM) and volatile organic compounds (VOCs) from municipal sewage wastewater treatment plants with sources such as multiple hearth furnaces, are often treated with wet electrostatic precipitators (wet ESPs / WESPs), and regenerative thermal oxidizers (RTOs). NESTEC has extensive experience in these applications.

NESTEC has supplied multiple regenerative thermal oxidizers (RTOs) to treat malodors from food and animal feed processing plants, rendering plants, sewage treatment plants, and flavorings/odorant manufacturing. RTOs are well suited for these applications because of their low operating costs and fuel usage.

Pump jacks in the oil fields deal with well-head gases containing sour gas hydrogen sulfide (H₂S) and methane. The gases are often burned in a heat recovery steam generator (HRSG) to produce steam which creates sulfur dioxide (SO₂) and sulfuric acid mist (SO₃, H₂SO₄) emissions.  NESTEC has extensive experience with wet electrostatic precipitator (wet ESP / WESP), and wet scrubber systems in oil and gas to control these emissions.

Pharmaceutical plant applications include the treatment of various chemical vent streams from mixers and storage tanks, and of exhausts from pill dryers. The latter often contain methylene chloride, which forms hydrochloric acid as a byproduct of oxidation; incorporating wet scrubbers into a regenerative thermal oxidizer (RTO) application is often an indicated solution.

Gaseous and aerosol particulate emissions come from curing ovens and dryers, from calendaring and fusion operations. NESTEC engineers have extensive experience in capturing and treating emissions from extrusion lines; from web offset, rotogravure, flexographic, and intaglio printing processes; and from embossing, lamination, and film production lines — including design for Permanent Total Enclosure (100 percent capture).

Pulp and paper mills present unique, and difficult materials of construction selection challenges in the application of regenerative thermal oxidizers (RTOs), wet electrostatic precipitators (wet ESPs / WESPs), and wet scrubbers. The NESTEC team is very experienced with power boiler wet ESP systems and RTOs treating non condensable gases (NCGs) in pulp and paper applications.

Oil refinery fluid catalytic cracking units (FCCUs) emit gases with sulfur dioxide (SO₂) and catalyst fines particulate matter (PM).  NESTEC has extensive experience with wet electrostatic precipitator (wet ESP / WESP), and wet scrubber systems on refinery FCCUs.

Semiconductor fabs emit gases with hydrogen fluoride (HF), heavy metals, particulate matter (PM), and volatile organic compounds (VOCs). Wet scrubbers, wet electrostatic precipitators (wet ESPs / WESPs), and regenerative thermal oxidizers (RTOs) control emissions.  NESTEC has extensive experience with semiconductor fab exhaust treatment.

The manufacturing of chemicals can generate vent-gas streams and fugitive emissions that must be captured and controlled. NESTEC has extensive experience in the design of emission collection systems including the application of pretreatment particulate removal, the oxidation of Volatile organic compounds (VOCs), and the treatment of acid gases.

Volatile organic compounds (VOCs), carbon monoxide (CO), particulate matter (PM), hazardous air pollutants (HAPs) such as formaldehyde and methanol, condensable organic aerosols including wood tars, fly ash, wood fiber and high moisture content air are some of the constituents found in the exhaust from wood dryers. Rotary, belt and flash-tube wood dryers are used in various wood products panelboard mills such as medium density fiberboard (MDF), oriented strand board (OSB), plywood and veneer and particleboard (PB). Industrial wood pellets also feature wood chip dryers that are similar to particle board dryers. Wet electrostatic precipitators (wet ESPs / WESPs) for PM control, regenerative thermal oxidizers (RTOs), and regenerative catalytic oxidizer (RCOs) for VOC /HAP control, are often used as emission control devices for wood dryers.

Panelboard continuous or multi-opening press emissions are often treated with wet scrubbers and/or wet ESPs, RTO’s and/or RCOs for PM and VOC/HAP emission control.

NESTEC’s wet ESP and RTO/RCO technology and team are the most experienced in wood products applications.