NESTEC will be exhibiting (Booth # 216) and presenting at the PELICE – Bioenergy conference on March 29th through April 1st, 2022 at the Omni Hotel in Atlanta.
NESTEC will be presenting AIR TREATMENT (Room C), on Tuesday, March 29 at 3:50 – 4:15 pm
We hope to see you there!
- James Nester……………..C 215 565 6189
- Jaymie Deemer…………. C 616 970 4505
- Ray Elsman………………. C 610 310 3548
Successful WESP – RTO or RCO Installations & Alternate Solutions
Since the early 1990’s, Regenerative Thermal Oxidizers (RTO) have been used in the Plywood and Composite Wood Panel (PCWP) industry to control air emissions from the dryer and/or press exhaust. The addition of a Wet Electrostatic Precipitator (WESP) prior to the RTO was later included to minimize the Total Particulate Matter (TPM) into the RTO.
NESTEC has addressed the issues and problems associated with the WESP and/or RTO for wood applications and offers the latest designs to reduce and/or eliminate the issues and associated costs due to:
- Caustic carryover to the RTO during WESP flushing stage
- Miss alignment of the WESP electrode over time
- Poor WESP uniform air flow through the tubes and the associated reduced efficiency
- RTO valve leakage and/or thermal expansion failures
- RTO heat recovery media support failures due to over stress
- Poor RTO uniform airflow into the heat recovery media and associated reduced efficiency
- Poor overall system design
NESTEC has installed eleven (11) complete air emission control systems with RTOs, Regenerative Catalytic Oxidizers (RCO), and WESPs, including the process exhaust collection and control systems, in the past two (2) years for the wood industry. The NESTEC systems were installed for control on the rotary wood chip dryer exhaust, hammermill, and/or cooler processes at facilities in Mississippi, Louisiana, and Georgia.
Two (2) other systems are presently being engineered and installed in Texas.
Recent Wood RCO, RTO & WESP Systems Completed
A typical NESTEC total process duct collection system and a WESP RTO arrangement is shown below. The process exhaust is controlled through two (2) parallel NESTEC WESPs and MCC RTO units with a single exhaust stack.
The wood plant air emissions will vary based on the wood process; Veneer, MDF, PB, OSB or pellet and the supplied wood moisture content, dryer design, and wood type.
- Southern pine
- Or a mixture
The mixture’s approximate makeup of hardwood versus softwood and associated emission levels will have a direct effect on the Volatile Organic Compound (VOC) and Hazardous Air Pollutant (HAP) emission levels.
- The VOC emissions exceed 250 tons per year at approximately >57% softwood and <43% hardwood.
- The HAPs emissions exceed 25 tons per year at approximately >37% softwood and <63% hardwood.
- The major HAPs are:
- The major HAPs are:
- In this case, HAPs are the greater controlling factor in establishing associated air emission control requirements.
NESTEC, Inc. provides a single point responsibility and service/training for all RTO, RCO, WESP systems, with 24/ 7 responsiveness.
For assistance from our extensive experience, call or email NESTEC Inc. (Office: 610-323-7670) for a free evaluation of your specific needs.
firstname.lastname@example.org (Service, Aftermarket)