NOx is a class of pollutants that is a binary compound of nitrogen and oxygen often generated from non combustion processes like metal refining, pickling or plating baths, and nitric acid operation processes. The Acid Fume Separator (AFS) is a proprietary device that allows for direct venting of an acid tank located inside a mechanical room. We review the Velocity and Static Pressure of the Ventilation System in order to evaluate if it is currently running properly and what changes, in Duct and Fittings or possibly Blower modifications, may be required to meet the new demands on the system. Mech-Chem is capable of dealing with all of your Ammonia Scrubber needs. These power controls are for proper operation of: Mech-Chem is very versatile when it comes to programming PLC’s. Mech-Chem is very well versed in the design and manufacturing of Explosion Proof (XP) systems. The first stage is typically designed to be flushed, with fresh water, every hour. Wet Collectors & Scrubbers Whirl Wet Dust Collector Packed Bed Acid & Fume Scrubbers Cross-flow Air Scrubbers Fan Separator Tri-Mer Chrome Scrubber Odour Control Scrubber Polypropylene Process Tanks Used Dust Collectors Explosion Protection Explosion Vent Panels Flameless Venting Explosion Isolation Explosion Suppression Accessories/Options Ammonia is an irritant to eyes, nose and throat and even poisonous at higher levels. We provide all the electrical specifications the Scrubber will require to keep critical equipment operational during a Power Outage. The AFS eliminates the need for costly venting to outside areas or secondary water tanks. Caustic, along with a strong reducing agent, is sprayed into the NOx fume stream. Carbon adsorbers are designed for high efficiency removal of oil vapors, H2S and other odors, VOCs and other gas phase hydrocarbons. perform under the most demanding corrosive environmental conditions. Mech-Chem deals with chemical handling in a unique way. Degassing Towers – Removal of the acid forming carbon dioxide from water. These calculations and the air disbursement requirements laid out by the permit will dictate the height of the stack. We design boxes or splash shields to set the chemical feed pumps in or behind to protect the operator from any splashing or chemical spray should the equipment fail. Tubing, depending on location and length of run, is double contained by running it through a clear PVC Pipe. TFI Inline Design manufactures all-plastic laboratory equipment including casework, fume scrubbers, fans, fume hoods and neutralization systems that provide improved laboratory performance, aesthetics and longevity while ensuring a safe environment for lab staff and customers. Most common forms of industrial hazardous NOx fumes needing to be scrubbed are Nitrogen Oxide (N2O), Nitrogen Dioxide (NO2), Nitrous Oxide (NO). When the set point is reached the chemistry is automatically metered into the reservoir to ensure proper treatment of the gas stream. The Acid Fume Separator (AFS) is a proprietary device that allows for direct venting of an acid tank located inside a mechanical room. Mech-Chem designs builds and installs Scrubbers to handle all types of chemical fumes. Horizontal Scrubbers are designed so that the gas stream passes horizontally through a section of packed media, while liquid scrubbing solutions still passes down vertically. Inside the tank are water spray nozzles. The reaction is relatively slow and special consideration must be given to the retention time and reaction tank sizing. Mech-Chem is capable of producing Equipment Layouts, Process Flow Diagrams, Process and Instrumentation Drawings, Electrical Control Panel Schematics, Control Panel Door and Back Panel Layouts, Fabrication Drawings for shop assembly along with Equipment Specifications, Equipment Operator and Maintenance Manuals (O&M’s) and Operational Instructions as to the Operation of the Ventilation System. Wet Scrubbers – Removal of contaminants and particulates from a gas stream by passing the stream through a packed bed or venturi scrubber. Challenge. Some of these Radioactive Scrubber Systems are in use for manufacturers of Pharmaceutical Equipment, Government Installations and Laboratories just to name a few. As the gas passes through the water mist, acids are absorbed, allowing clean air to rise. Mech-Chem designs, fabricates, and installs all types of fume scrubbers to be fully integrated into our client's production need. For Ammonia Scrubbers to meet these standards, a number of variables need to be reviewed including, but not limited to, concentration of the gas stream, other chemicals in the air stream, particulates, temperature and flow rate. Reagent Chemistry Drum or Tote Containment, Level Control Monitoring of Reagent Chemistry Drums, Monitoring of any leaks or liquid build up in containments, Chemically treating the Scrubber to dissolve Solids or eliminate Bacterial build up in the packing, Velocity Measurements, Static Pressure and Smoke Capture testing, Calibration of all instrumentation (pH, ORP, Level, Flow, etc. It is hoped that the result of this paper will be to provide an easy to follow manual on wet scrubber design suitable for use . Increasing the static pressure in the Scrubber, or raising the flow rate of the Scrubber in a process area that has a lack of proper make-up air, will not rectify the situation and in fact will only increase the problem. Mech-Chem not only engineers within these standards but also deals with local Fire Marshals and Building Inspectors, as well as the facilities Insurance Company, to implement the required Smoke and Fire Ratings. DESIGN | ENGINEERING | FABRICATION | INSTALLATION. A high efficiency wet scrubber is required to prepare NOx fumes for emission to the atmosphere. The result is a fume-free workplace with added protection of metal and electrical components. The ammonia reacts with the sulfuric acid to form ammonium sulfate, a soluble, non-volatile salt, which is removed from the scrubber effluent through the overflow. Horizontal packed bed scrubbers are often utilized when clients have a limitation on headroom or a low-profile design is needed. The chemical vapors then travel up through a mist eliminator to remove additional particulates and water droplets. A fume scrubber is recommended for an acid storage tank system. This fume scrubber was constructed of Hastelloy C-276 with all explosion proof instrumentation and controls. The Screens will also display any alarms that occur. Dust collectors operate at a 99%+ efficiency of being able to remove dust and particulates from continuous facility air streams. This hydrolysis reaction is promoted by using a sulfuric acid scrubbing solution as a catalyst. These calculations and the air disbursement requirements laid out by the Permit will help dictate the height of the stack. Parts can also become trapped in the process tanks leading to vapors from the tank to continue to permeate the air inside of the room as well as potentially damaging the part. fax: 412-787-0704 Mech-Chem offers a complete scope of fume scrubber & ventilation services from simple hood design all the way to full scale turnkey operations. Custom fume hoods & manifold systems are designed to extract hazardous airflow fumes away from the working area, providing a safe & healthy environment. Additionally, we offer complete installations, start up and training at your facility. Mech-Chem also installs the Blower, Piping System and Push Air Header in order to deliver a fully functional system designed to maximize the capture of exhaust fumes and have a clean and safe work environment. We offer complete packages, including instrumentation and controls, skid-mounting of equipment, caustic storage tank and metering pump, and installation. Mech-Chem's fume scrubbers are designed to provide very efficient removal of acid, chemical, solvent and NO2 fumes, mists, vapors, entrained liquids, particulates, and noxious corrosive gases from the exhaust air stream. Chemical scrubbers can remove up to 99.5% of hydrogen sulfide and ammonia, even at high concentrations. The concentration of acidic gases is directly related to the vapor pressure of the acid in aqueous solution. Degassing Towers – Removal of the acid forming carbon dioxide from water. Acid processing industries often generate fumes that need to be neutralized and reduced to a harmless vapor before discharge to the atmosphere. Refillable media turns from white to pink when it's time to be replaced. Mech-Chem has a Panel Fabrication Shop that Designs and Builds to UL Specifications and follows UL’s National Standards for Safety. ... With years of delivering high quality and reliable scrubbers, we can custom design our packages to fit your needs for specialty applications. 4 shows a special design that was developed to remove H 2 S from a sour-water stripper overhead stream that also contains Treated gas Spent caustic (NaSH) Exchanger Inlet sour gas Makeup caustic Weak caustic feed Strong caustic feed Makeup water Fig. Hood designs are customized to meet the size and process performed in the tank. Mech-Chem accomplishes this method of Emergency Operation in several ways depending on the style of Panel controlling the Scrubber (Relay Logic or PLC). Pittsburgh, PA 15275, ph: 412-787-2484 We are able to fabricate panels that meet the explosion proof rating. The system introduces water or a specific scrubbing solution through a submerged plenum. We specialize in handling all types of acid fumes and hazardous/corrosive streams, to ensure our clients have a neutralized & contaminant free air stream during emission. Air Make-Up is extremely important to a successful Ventilation System. The fumes percolate up and through the scrubbing solution, then vent out of the top of the scrubber system. RP1 insures molecular contact between the gas or fume being scrubbed and the ionized salts in a way that insures reliable, low limit performance. Vertical packed towers are designed with a counter current flow while the contamintated air stream flows upwards and recirculating liquid sprays downward through into the packing media. Calculating this overall flow starts with the Hoods. These scrubbers are designed to handle small micron to submicron sized particulates and capable of capturing high temperature moisture while simultaneously removing the coarse or fine solid materials & pollutants from exhaust streams. Mech-Chem will also layout and develop any documentation, from calculations to efficiency rates, needed to assist in the Permitting procedure. Progressively stepping up the size of the duct work also helps maintain a steady, laminar air flow to the scrubber. Although scrubbers are a low maintenance item, this services is also highly recommended to schedule in order to prevent any unscheduled down time and loss of production. Our personnel carry all the required certifications in order to work on, in or around any equipment. These calculations, coupled with our knowledge of the fumes being emitted by the process, allow Mech-Chem to assist in the Permitting of the Air Discharge. Acid processing industries often generate fumes that need to be neutralized and reduced to a harmless vapor before discharge to the atmosphere. Ozone can help maintain a clean and efficient wet scrubber by ensuring there is oxygen in the waste water stream of the scrubber. Mist eliminators Mist elimination is a critical part of wet scrubber design. Mech-Chem specializes in understanding variations in climates and designs the system accordingly. ), Removal and Replacement of Strainers, Spray Nozzles, Packing, Mist Eliminator, Blower Belts, and any other wear items. Ammonia (NH3) is a colorless gas with a pungent odor at concentrations above 50 ppm. A scrubber is used to "scrub" exhaust streams of unwanted solids, liquids, or gas particles before they are released into the atmosphere. Why are chemical scrubbers needed? Mech-Chem offers a large variety of Hoods Duct and Fittings. 2020 ProMinent Fluid Controls, Inc. All rights reserved. Mech-Chem has on staff Chemical Engineers who perform calculations based on the amount of chemistry that will be drawn into the Ventilation System. Wet Acid Scrubber – Controlling Caustic Feed ... or that inject a dry reagent or slurry into a dirty exhaust stream to "wash out" acid gases. The size of the Hood slot openings combined with the size and style of fabrication determine the draw from the surface of the tank. This type of wet scrubber, or NOx scrubber, uses a single reservoir with a packed bed. KCH designs, manufactures, and installs a variety of corrosion resistant scrubber systems for many applications requiring control of Hazardous Air Pollutants (HAPs) or control of noxious odors. The majority of scrubbers function using adsorption, which involves the contact of a gas stream with an aqueous solution, due to the fact that the Chrome exists in the mist droplets, and not as a gas, the adsorption method is not effective. The proprietary reagent will change from white to pink when Mech-Chem is capable of reviewing a facilities Ventilation System and recommending the appropriate changes required to deal with any desired modifications. Mech-Chem offers preventive maintenance programs for all types of fume scrubbers. These Control Panels can come fully equipped with instrumentation to monitor all aspects of the operation of the Scrubber: Mech-Chem’s Preventative Maintenance services include: Mech-Chem Associates, Inc. is a full service engineering and design firm that specializes in the manufacturing and construction of chemical operations facilities, acid recovery systems, and fume scrubbing systems.. pH Controller – Capable of adding Acid or Caustic depending on the Scrubbers treatment requirements, ORP Controller – Capable of adding and monitoring any Oxidizers added to the Scrubber, Flow Meters – Monitors circulation rate of pumps, Level Control – Monitors and activates the automatic fill in the reservoir level drops, Blow Down – Allows the Scrubber to purge concentrated solution in the reservoir to make room for water addition, Pressure Differential Meter – Monitors pressure drop between sections of the Scrubber so the operator is aware if the unit is operating properly, Circulating Pump(s) – To pump the solution in the reservoir up and through the spray nozzles, Fan / Blower – To draw the air from the process tanks through the hoods and Scrubber and discharge it to atmosphere. Fume Capture & Exhaust Systems. Due to these unique characteristics of Ammonia, the treatment of Ammonia gas is handled differently than other vapors typically found in industry. Push Air Systems are designed to direct fumes and vapor towards the ventilation Hoods in order to maximize the capture of these gases. UL representatives perform site inspections of the Shop as well as the Panels to verify that all UL standards and requirements are met. Fume hoods are designed with chemical resistant material and can be shaped to any size to fit any new or existing tank. Stripping Towers – Packed bed tower aeration offers an effective and economical approach to reducing VOC contamination in liquids. The gas contaminants are adsorbed into the liquid. The Technicians are certified in Confined Space Entry, Lock Out / Tag Out, OSHA 10, CPR, AED and First Aid, Fall Protection, PPE, and Hazard Communication. If requested Mech-Chem can and will install dampeners on the hoods allowing the facility to reduce the flow to a particular process tank. Mech-Chem has designed, built and installed scrubbers to handle fumes and particulates that are generated from radioactive processes. Panels can be built either using relay logic or PLC Controlled. Emitted from a variety of sources, including: boilers, catalytic oxidizers for halogenated solvents, storage tank vents, and various chemical processes. Sales-US@prominent.com. If the room has an inadequate amount of Make-Up Air a slight vacuum will be created in the area. Scrubbers can be designed in many different sizes, styles, and materials of construction based on your facility's chemical emissions. Additionally, when mixed with air at certain concentrations, Ammonia will become explosive. Allen-Bradley is our standard PLC model but we offer almost any style of unit to meet the facilities requirement (Siemens, Mitsubishi, GE Fanuc, Omron, etc.). discussion will revolve around the practical design of a phos phoric acid production facility wet scrubber. Physical adsorption relies on inter-molecular forces while chemical adsorption involves the formation of chemical bonds. the component in the liquid and lowering of the absorption gradient. Access doors on the side of the Scrubber are oriented in such a way as to allow the packing to be easily inserted during installation while keeping in mind that the packing may have to be replaced in the future. Customized to your specific need Eliminate odors, acids, chemicals and NOx fumes with waste fume vent scrubbers from the corrosives specialists at Hazarsolve. That may need to be designed in many different sizes, styles, and installation particular process tank Tri-Mer use! 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