EST Emergency Scrubber Productsby

Ken ZarzyckiProduct Manager

Emergency Chlorine Scrubbing

AndMeeting the Codes

Liquefied Gases-- are gases at normal temperature and pressure

that are compressed to a liquid state and usually stored under their own vapor pressure at the prevailing ambient temperature.

Hazardous Gases-- are gases that have a potential for injury to life, limb or property at

relatively low concentrations.- Some common gases used in water and waste treatment plants are

Chlorine or Cl2, Sulfur Dioxide or SO2 and Ammonia or NH3.

Liquefied Hazardous Gases

Important Toxic Gas Concentrations - ppm

• MW 71 64 17

• Fatal 1,000 4,000 10,000• IDLH 10 100 300• UFC 5 50 150• Final(OSHA) 1 5 50• TWA 0.5 2 25

ie: 10,000 ppm = 1% by volumeie: MW Air = 29

Gas Cl2 SO2 NH3

One-Ton Container Leak Sources

Sides and Heads of ContainerFusible Plugs and Feed Valves

Valve PackingValve SeatValve Threads – In & Out & NutBroken Valve – usually at container thread

VAPOR

Fusible Plug CoreFusible Plug Threads

LIQUID

150# Cylinder Threaded Plug in Valve Body

Fusible Plug

Excess-Flow Valve

Multi-Ton Tanks and Railcars Leak Source

Other Leak Containment Approaches

Chlortainer SafeTC•250 psig design pressure•$60 to $65K/per container•Chlorine take-off connections•Pressure Relief Valves

•Feed valve shutoff•Ignores valve threads•Ignores fusible plugs

Advancements in Chlorine Abatement Technology

Treatment Evolved from:•Solution-By-Dilution •To Ejector Gas Recycle•To ‘Once-Through’ Ejector/Packed Tower •To Low Profile Wet MVP (Multi Venturi Packless) •To Dry Chemical Adsorbent Scrubbers

STWP Inc / EST is the only qualified supplier capable of supplying all three forms of accepted emergency scrubbing technologies: 1. Wet Packed 2. Wet Packless (MVP) 3. Dry Emergency Scrubber Systems

Advancements in Chlorine Abatement Technology

1. NO CHEMICAL MAINTENANCE2. SPENT MEDIA IS NON-

HAZARDOUS WASTE3. ONE MOVING PART - FAN4. NO CHEMICAL RECIRCULATION

PUMPS OR PIPING5. CHEMICAL LEAK CONTAINMENT

IS NOT REQUIRED6. CAN OPERATE AT SUB-ZERO

TEMPERATURES WITHOUT HEATING

EST TYPE “DES” DRY EMERGENCY GAS SCRUBBER

4 mm impregnated activated alumina pellets

Performance Testing

• Certified Test Data - independent testing laboratories, third party consultants

• Meet or exceed “Worst-Case” hazardous gas release rates

• Scrubber exhaust - never to exceed code established discharge concentrations

Wet Reaction Chemistry

Cl2 + 2 NaOH -NaOCl + NaCl + H2O + 628 BTU/lb Cl2(g)

SO2 + 2 NaOH -Na2SO3 + H2O + 1041 BTU/lb SO2(g)

NH3(g) + H2O -NH3(aq) + 906 BTU/lb NH3(g)

EST “ECS” 25 Ton Stationary Tank Scrubber

Chlorine Scrubber Highlights• No fans required - ejector moves the air; one less moving part• Sealless Pumps - no seal flush or seal maintenance

Caustic dilution water demineralizers

Emergency Ammonia Scrubber Tower

Mag-drive pumps

Chlorine Ejector and Tower

Caustic storage tank

Ejector Venturi Scrubber

Ejector Venturi / Packed Tower

High Performance Packing Media

Carbonate Formation on Wet Packing

• Spec Advantages• Fail-Safe Fan Side – only one fan required• Packless – longer caustic life• Emergency Start - no wetting time delays

Ejector Venturi Scrubber

EST Low Profile Once Through Wet MVP Gas Scrubber

Emergency Gas ScrubbersCity of Tracy

One 30’ Tank WWTP 30 Ton Cl2 or 20 Ton SO2

Multi-Venturi Packless - MVP

30 TON Chlorine Container

Multi-Venturi Packless – MVP Scrubber

Caustic storage tank

MVP Contactor

Mag-drive pumps

Multi-Venturi Packless 30 Ton Chlorine Scrubber

EST™ Type DES 3000 Dry Emergency Chlorine Gas Scrubber System

Standard Design to treat one-ton Chlorine Containers

1. NO CHEMICAL MAINTENANCE2. SPENT MEDIA IS NON-

HAZARDOUS WASTE3. ONE MOVING PART - FAN4. NO CHEMICAL RECIRCULATION

PUMPS OR PIPING5. CHEMICAL LEAK CONTAINMENT

IS NOT REQUIRED6. CAN OPERATE AT SUB-ZERO

TEMPERATURES WITHOUT HEATING

EST TYPE “DES” DRY EMERGENCY GAS SCRUBBER

4 mm impregnated activated alumina pellets

Media: MSDS for “STS” Dry Scrubber Media

• Type “STS” Dry Scrubber Media– White solid spheres or granules, odorless. – Major composition: Al2O3 76-88 % and Na2S2O3 > 1 %. Chemical formula is

proprietary. – Low health risk. – Toxicological – Non-toxic– No unusual fire or spill hazard. Non-Combustible; Not self-igniting– Disposal – Consult Federal, state or local landfill disposal laws– Ecological – Non-toxic– Store in a cool, dry location in original “as delivered” packaging– Protection: safety glasses, gloves, dust mask– NFPA Hazard Classification: Health (1) / Flammability (0) / Reactivity (0)– OSHA PEL TWA = 15 mg/m3 total dust; 5 mg/m3 respirable dust

Cl2 + STS - NaCl (Salt)

Cl2 + PHD - KCl (Salt)

SO2 + PHD - K2SO4 (Salt)

NH3 + PA - (NH4)H2PO4 (Salt)

H2S + PP - K2SO4 (Salt)

Dry Reaction Chemistry

Applications: EST™ Dry Scrubber Installations

• Lake Watertree WTP, Lugoff, South Carolina• Artesian WTP, Delaware (Multiple sites)• Rio Bravo WTP, Texas• McCain Foods/Harbin China• City of Spartanburg, SC• Stockton East WD WTP, Stockton, CA• Sierra Madre Public Works Department, CA• Sincor Unidad, Venezuela

Lugoff, SC 10’ Diameter DES6000 STS

Spartanburg SC 10’ Diameter DES4000 PHD

Drawings: Layout and Parts DES 3000