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Saving Money with On Site Solvent Recycling Systems

Saving Money with On Site Solvent Recycling Systems

Industries involved in repair and refurbishing of equipment such as auto body, collision repair and other manufactures in metalworking, furniture and cabinet making often produce large amounts of hazardous waste that must then be disposed of. An Environmental Protection Agency (EPA) rule on recycling and storage of hazardous waste that goes into effect in July could affect all of those industries. The rule will add new rules and requirements for companies that have been storing spent solvents on-site.

Solvent and/or paint thinner is considered the largest hazardous waste stream in auto body and collision repair and furniture manufacturing industries, however up to 97% or more of this waste can be recovered and re-used through an on-site solvent recycling system.

Solvent and paint thinner waste is usually created during the cleaning of paint/coating spray guns using either a manual or enclosed spray gun cleaning system. An on-site solvent recycling system can save a business significant savings through reduction in waste disposal and transportation costs.

Solvent Recycler SR -30 Series, for recycling paint thinner, paint solvents

Solvent Recycler SR -30 Series

Solvent recycling systems work by distilling waste solvent/paint thinner to separate the re-usable solvent from the waste paint or coatings. An on-site recycling system such as the International Surface Technologies (IST) SR-Series product line of solvent recyclers can reduce a batch of solvent waste by up to 95%, separating the mixture into a clean, re-usable solvent and leaving a “puck” of sludge/solid waste that can be much more easily and cheaply disposed of. By removing the liquid and leaving a solid waste product, businesses can reduce regulatory requirements and future liability while saving money. The IST SR Series recycles most popular solvents, including mineral spirit, flexo & litho solvents. The SR-Series are Available in sizes 8, 16, 32 and 48 gallon with vacuum. Sizing the right recycler for your business is https://www.gulftech.us/solvent-recycling-systems/based on the amount of solvent produced per day/week.

IST and their local representatives offer a cost savings analysis of your existing process to help you determine whether a solvent recycling system is right for you. By looking at the number of weeks per year of operation, amount of solvent purchases and cost of disposal per gallon of waste, they will provide a Return on Investment Analysis. A business that invests in an SR-Series Recycler could potentially recoup their investment in as little as 4 to 12 months while enabling them to recycle all cleaning solvents, reduce solvent purchases by 90% and waste disposal cost by 95%.

Industries Served: General manufacturing – Aerospace and aviation (MRO) – Marine – Automotive – Petroleum Flexography – Lithography – Wood finishing – Power & energy – Pharmaceutical

Contact Gulftech Enterprises, Authorized IST Dealer for information and Pricing: 727-469-8773 Twerner@gulftechsales.com : ron@gulftechsales.com

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Solvent Recycling Systems

Why Be Concerned about Hexavalent Chromium?

OSHA Compliance Requirements for Hexavalent Chromium (Hexavalent chrome, Chromium 6, Chromium VI) Effective May 31, 2010

Why be concerned about Chromium VI? Hexavalent chromium (Cr VI) is an IARC-1 human carcinogen. According to the EPA, “The best estimate of the excess risk of lung cancer from exposure to hexavalent chromium…is 8 cases of cancer in every 100 workers exposed.” -Environmental Protection Agency, Chromium VI (CASRN 18540-29-9). Other adverse health effects associated with Hexavalent chromium overexposure include irritation of the nose, throat, and lungs. Repeated or prolonged overexposure can damage the mucous membranes of the nasal passages and cause ulcers to form. In some cases the damage is so severe that the septum (the wall separating the nasal passages) develops a hole. Skin exposure to hexavalent chromium over prolonged periods can cause ulcers to form. Some workers develop an allergic sensitization to chromium. In sensitized workers, contact with even very tiny amounts can cause a serious skin rash. Exposure to Chrome 6 can also cause permanent eye damage in some cases.

Employees performing welding or thermal cutting tasks on chromium – containing metals are likely to be over-exposed to Hexavalent Chrome unless engineering controls and / or respiratory protection are used.

Only proven engineering controls (such as source capture air filtration from Gulftech Enterprises, Inc) can eliminate the need for the regulated areas. Filtration (rather than simple exhaust to the outside) allows re circulation of expensive conditioned air and reduces the size of the regulated area and reduces the number of affected employees.

There are generally three ways to maintain air quality:

– Dilution Ventilation (increased airflow in the welding area)

– Ambient air collection using dilution air and a dust or fume extraction device (ambient air cleaners can be mounted above the weld area to capture the weld fume).

– Source capture using a dust or fume extraction device (weld fume arms connected to either a portable fume extraction system or ducted to a dust collector).

Fume Back: Suction Off ; Suction On

New OSHA Standard 29 CFR 1910.1026

Summary of NFPA 484 Standard for Combustible Metals 2009 edition

The following are items taken from the new NFPA 484 Standard to which I have received many questions.

The intent of this paper is to highlight the items that are most violated. This brief is not intended to replace the actual standard which has much more information on combustible metals.  By law, any company who processes these metals are required to have this manual on premises. To order go to http://catalog.nfpa.org

Chapter 3 Definitions

3.3.6* Combustible Metal Dust.  Any finely divided metal 425 microns (40 mesh or 0.0165”) or smaller.

3.3.8 Deflagration.   Propagation of a combustible zone at a velocity that is less than the speed of sound in the unreacted medium.

3.3.13 Fines

3.3.13.1 Aluminum fines.  The fraction of an aluminum powder that is 45 microns (325 mesh) or smaller in nominal diameter, either as a discrete particle or as an agglomerate of discrete particles.

3.3.13.2 Magnesium fines.  The fraction of an aluminum powder that is 44 microns (320 mesh) or smaller in nominal diameter, either as a discrete particle or as an agglomerate of discrete particles.

3.3.13.3 Tantalum fines.  The fraction of an aluminum powder that is 10 microns or smaller in nominal diameter, either as a discrete particle or as an agglomerate of discrete particles.

3.3.13.1 Titanium or Zirconium fines.  The fraction of an aluminum powder that is 44 microns (320 mesh) or smaller in nominal diameter, either as a discrete particle or as an agglomerate of discrete particles.

Chapter 6 Aluminum

6.1.9.10.1* Blades and housings of fans used to move air or inert gas in conveying ducts shall be constructed, non-sparking metal such as bronze, nonmagnetic stainless steel or aluminum.

6.3.2. Dust-producing operations

6.3.2.1 Machines that produce fine particles of aluminum shall be provided with hoods, capture devices, or enclosures that are connected to a dust collection system having suction and capture velocity to collect and transport all the dust produced.

6.3.2.4 Grinding operations shall not be served by the same dust collection system as buffing and polishing operations.

6.3.2.5 Dry-type dust collectors shall be located outside of buildings.

6.3.2.5.1 Individual machines with portable dust collection capability shall be permitted to be used when the object being processed or finished is incapable of being moved  to a properly arranged fixed hood or enclosure and shall incorporate the safeguards in 6.3.2.5.1 (A) through (D)

(A) The operation of portable dust collection devices shall be subject to a hazard analysis to ensure that the risk to personnel and operations from flash fire and shrapnel is minimized.

(B) Personnel protective clothing shall comply will 6.6.2

(C) The collector shall be designed to dissipate static electricity.

(D) Collector retention capacity shall be limited to 0.45 kg (1 lb.)

6.3.2.5.2 Dry type dust collectors shall be provided with barriers or other means for protection of personnel.

6.3.2.5.3 The area around the collector shall be posted with a sign that reads as follows:

CAUTION: This dust collector can contain explosive dust. 

Keep outside the marked area while equipment is running.

 

6.3.2.6 Dust collection systems shall be dedicated to the collection of aluminum and aluminum alloy dust only.

 

6.3.2.6.1 Grinders, buffers, and associated equipment with dust collectors utilized for processing aluminum shall be provided with a placard that reads as follows:

WARNING: Aluminum Metal Only – Fire or Explosion can result with other Metals

 

6.3.2.6.2  If the combustible aluminum dust collection system is to be used for other materials, the system shall be disassembled and thoroughly cleaned of all incompatible material prior to and after it uses.

 

6.3.3 Dust Collection Ducts and Ductwork

 

6.3.3.1 All ductwork to be installed per NFPA 91.

 

6.3.3.2 Ducts shall be designed for maintaining a velocity of not less than 4500 ft/min or (1364 m/min).

 

6.3.3.6 Duct systems, dust collectors and dust producing machinery shall be bonded and grounded to minimize static electrical charge.

 

6.3.4 Wet type dust collector

 

6.3.4.1 The exhaust vent shall terminate outside the building and be securely fastened.

 

6.3.4.1.1 The duct shall be as short and straight as possible and shall be designed to withstand the same explosion pressure as the wet-type dust collector.

 

6.3.4.1.2 The cleaned air shall be permitted to be returned to the work area where tests conducted by an approved testing organization prove that the collector’s efficiency is great enough to provide safety to both personnel and property with regards for particulate matter in the cleaned air stream and accumulations of particulate and hydrogen within the work area.

 

6.3.4.3 Location of dust collector

 

6.3.4.3.2 The blower shall be located on the clean air side of the collector

 

6.3.4.4 The dust collector shall be arranged so that the dust laden airstream is thoroughly scrubbed by the liquid to achieve the desired efficiency.  The use of additional dry filter medium either downstream or combined with the wet collector shall not be permitted.

 

6.3.4.6 Collector Sump Venting

 

6.3.4.6.1 The sump of water wet type dust collectors shall be ventilated at all times.

 

6.3.4.6.2 Vents shall remain open and unobstructed when the machine is shut down.

 

6.3.4.6.3 When the dust collector is not in operation, ventilation shall be permitted to be provided by an independent blower or by an unimpeded vent.

 

6.3.4.7 Power Supply

 

6.3.4.7.1 The power supply to the dust-producing equipment shall be interlocked with the airflow for the exhaust blower and the liquid level controller of the dust collector so that improper functioning of the dust collection system will shut down the equipment it serves.

6.3.4.7.2 A time delay switch or equivalent device shall be provided on the dust producing equipment to prevent the starting of the motor drive until the collector is in complete operation.

 

6.3.4.8 Disposal of Sludge

 

6.3.4.8.3 Sludge shall be permitted to be mixed with inert materials in a ratio of at least 5 parts inert material to one part sludge.

 

6.3.5 Dry type dust collectors

 

6.3.5.1 Electrostatic collectors shall not be used.

6.3.5.2 Dust collecting filter medium shall be designed to be conductive so as to dissipate static electrical charges.

 

6.3.5.3 Dry-dust collection systems shall be designed and maintained so that internal cleanliness is ensured. The accumulation of material inside any area of the collector other than in the discharge container designed for that purpose shall not be permitted.

 

6.3.5.5 Dust shall be removed from dry collectors at least once each day and at more frequent intervals if warranted.

 

6.3.5.5.1 Extreme care shall be taken in removing dust from the collectors, to avoid creating dust clouds.

 

6.3.5.5.3 Waste material shall be mixed with an inert material in a volume ration of five parts inert material to one part metal dust.

 

6.3.5.6 Dry collectors used for combustible aluminum dust shall be provided with deflagration vents.  The selection of the type and location of the vents or weak section of the collector shall be designed to minimize injury to personnel and to minimize blast and fire damage to nearby equipment or structures.

 

6.3.6 Recycling of exhaust air.  Recycling of air from a dry dust collector into a building shall be prohibited.

 

6.4.3 Vacuum Cleaning Systems

 

6.4.3.4 Portable vacuum cleaners shall be used only if listed and approved for use with combustible aluminum dust.

Chapter 10 Titanium

10.4 Machining, Fabrication and finishing of parts

10.4.1.2  Operations in which titanium is subjected to processing or finishing shall include and shall not be limited to grinding, buffing, polishing, sawing, and machining of solids.

10.4.4 Titanium, Dust Collection

10.4.4.1.2 The hoods or enclosures shall be connected to liquid precipitation separators (wet-type dust collectors) and the suction unit shall be installed so that the dust is converted to sludge without contact, in the dry state, with any high speed moving parts.

10.4.4.2.2. Ducts shall be fabricated and installed in accordance with NFPA 91.

10.4.4.4  If the combustible titanium dust collection system is to be used for other materials, the system shall be disassembled and thoroughly cleaned of all incompatible material prior to and after it uses.

 

10.4.4.5  Grinders, buffers and associated equipment with dust collectors utilized for processing titanium shall be provided with a placard that reads as follows:

Caution

Current Use: Titanium Metal – Fire or Explosion can result with other Metals 

10.4.6.2 Ducts shall be designed to maintain a velocity of not less than 4500 ft/min or (1364 m/min).

10.4.4.6 Power Supply

10.4.4.6.1 The power supply to the dust-producing equipment shall be interlocked with the airflow for the exhaust blower and the liquid level controller of the dust collector so that improper functioning of the dust collection system will shut down the equipment it serves.

10.4.4.6.2 A time delay switch or equivalent device shall be provided on the dust producing equipment to prevent the starting of the motor drive until the collector is in complete operation.

10.4.7 Wet type dust collector

 

10.4.7.1 The exhaust vent shall terminate outside the building and be securely fastened.

 

10.4.7.1.1 The duct shall be as short and straight as possible and shall be designed to within stand the same explosion pressure as the wet-type dust collector.

 

10.4.7.1.2 The cleaned air shall be permitted to be returned to the work area where tests conducted by an approved testing organization prove that the collector’s efficiency is great enough to provide safety to both personnel and property with regards for particulate matter in the cleaned air stream and accumulations of particulate and hydrogen within the work area.

10.4.7.2 The exhaust vent shall be inspected and cleaned frequently to prevent the build-up of highly combustible deposits on the interior of the duct.

10.4.7.3 The dust collector shall be arranged so that the dust laden airstream is thoroughly scrubbed by the liquid to achieve the desired efficiency.  The use of additional dry filter medium either downstream or combined with the wet collector shall not be permitted.

10.4.7.4 The blower shall be located on the clean air side of the collector

10.4.7.5 The dust collector shall be arranged so that the dust laden airstream is thoroughly scrubbed by the liquid to achieve maximum efficiency.

10.4.7.6 Collector Sump Venting

 

10.4.7.6.1 The sump of water wet type dust collectors shall be ventilated at all times.

 

10.4.7.6.2 Vents shall remain open and unobstructed when the machine is shut down.

 

10.4.7.6.3 When the dust collector is not in operation, ventilation shall be permitted to be provided by an independent blower or by an unimpeded vent.

10.4.8 Dry type dust collector

10.4.8.1 Electrostatic collectors shall not be used.

10.4.8.2 Dry-type cyclone shall be located outside of buildings

10.4.8.3 Dry dust collection systems shall be designed and maintained so that the internal cleanliness is assured.

10.4.8.4 The accumulation of material inside any area of the collector other than in discharge containers designed for that purpose shall not be permitted.

10.4.8.6 Dust shall be removed from dry collectors at least once each day and at more frequent intervals if warranted.

10.4.8.6.1 Extreme care shall take in removing dust from the collectors, to avoid creating dust clouds.

10.4.8.6.2 The dust shall be discharged into properly bonded and grounded metal containers that shall be covered promptly to avoid the creation of airborne fugitive dust.

10.4.8.6.3 Dry collectors shall be emptied before or when 100% of the storage capacity is attained.

10.4.8.6.4 The maximum volume of titanium fines collected before emptying shall not exceed 19 l or 5 gallons.

10.4.8.7 The cyclone dust collector shall be of conductive metal construction suitable for the service intended.

10.4.8.7.1 The cyclone dust collector shall be solid weld and with ground smooth internal seams.

10.4.8.7.2 The equipment shall be provided with a spark-proof airlock on the hopper discharge and connected to a covered metal container.

10.4.9 Recycling of Exhaust Air. Recycling of air from dry dust collection into buildings shall be prohibited.

 

12.4.3 Vacuum Cleaning Systems

 

12.4.3.4 Portable vacuum cleaners shall be used only if listed and approved for use with combustible aluminum dust.

ANNEX A EXPLANATORY MATERIAL

A.3.2.2 AUTHORITY Having Jurisdiction (AHJ) The phrase “authority having jurisdiction” or its acronym AHJ is used in NFPA documents in a broad manner since jurisdiction and approval agencies as do their responsibilities. Where public safety is primary, the authority having jurisdiction may be a federal, state, local, or other regional departmental or individual such as a fire chief, fire marshal, chief of a fire prevention bureau, labor department, or health department; building official; electrical inspector; or others having statute authority.  For insurance purposes, an insurance inspection department, rating bureau, or other insurance company representative may be the authority having jurisdiction.  In many circumstances, the property owner or his or her designated agent assumes the role of the authority having jurisdiction; at government installations, the commanding officer or departmental official may be the authority having jurisdiction.

A.6.1.9.10.1 information on spark resistant fans and blowers can be found in AMCA standard no. 99-0401-86, “Classification for Spark Resistant Construction.”

A.6.1.9.10.4 Ultimately, all fans and blowers in dust collection systems accumulate sufficient powder to become a potential explosion hazard.

A.6.1.10.1 (selected excerpts)

………………………………………………..

Industry experience has clearly demonstrated that an eventual explosion can be expected where a bag or media type (cartridge) collector is used to collect aluminum fines.  Seldom if ever can the exact source of ignition be positively identified.  In those unusual instances when it becomes necessary to collect very small fines for a commercial product, it is customary for the producer to employ a bag or media (cartridge) type collector. With the knowledge that strong explosive potential is present, the producer will locate the bag or media (cartridge) type collector a safe distance from buildings and personnel.  ……………………………………………………………….This type of collector will be located at least 50 feet from any other building or operations.  …………………..Explosion venting must adhere to NFPA 68, Standard on Explosion Protection by Deflagration Venting.

A.6.5.2.4 Experience has shown that dry sodium Chloride is one of the most effective chemicals for containing fires involving aluminum.

A.6.5.2.6.3 Class B extinguishing agents usually will greatly accelerate combustible aluminum dust fires and can cause burning metal to explode.

A.7.3.2.4.2 See “Industrial Ventilation: A Manual of Recommended Practice,” figure 4 14, the range of particle size, Concentration, and Collector performance.  One pound is equivalent to 7000 grains.

 

BRIEF OVERVIEW OF IMPORTANT ITEMS FROM THE NEW NFPA 68 Standard on Explosion Protection by Deflagration Venting

OSHA Issues New Combustible Dust Instruction

  1. Prior to this NFPA 68 was a guideline and now it is a standard.  Therefore insurance companies and local fire codes will accept this as its legal code unless the AHJ (AUTHORITY Having Jurisdiction) specifies another safety approach such as Factory Mutual guidelines.  OSHA will enforce the NFPA standard EN14491 as it mandatory code. 
  2. The AHJ (AUTHORITY Having Jurisdiction) is anyone where public safety is a concern.  This can be the fire marshal, labor department head, health department, safety inspector and etc. or just about anyone who has authority to make policy.  However and change from the stated conditions would require a waiver from the company stating the dust is not explosive or that they want us to comply with Factory Mutual.
  3. Chapter 1 Administration 1.3, unless the customer can prove in writing their dust is not explosive, all dust collectors will have explosion vents.
  4. Under Chapter 4.2.3.1 Hazard analysis will require a company keeping records of whether their dust in explosive or not.  In other words, the end user must submit his dust to an independent lab for analysis.
  5. Chapter 5 stated if you can prove another method is acceptable to protect the device from explosions that is acceptable to the AHJ, you can use that method.
  6. Chapter 6 states the end user must know the Kst value for his dustIt must be tested and certified unless it is a know substance where the Kst is a published value.

These are just a few of the highlights.

One of the best solutions for combustible metals applications is a wet dust collector.  Click the link below to learn more about GulfTech’s Product Offerings for wet dust collectors:

Wet Dust Collectors

Please obtain the actual standard at http://www.osha.gov/OshDoc/Directive_pdf/CPL_03-00-006.pdf.

Sites to visit

http://www.osha.gov/dts/shib/shib073105.html

http://www.osha.gov

www.nfpa.org

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