HCl fume scrubber is mostly used an acid storage tank system. A properly designed Hcl
fume scrubber will eliminate the release of irritating and corrosive vapors of
hydrochloric acid into the workplace and atmosphere.
The scrubber design will depend upon a number of factors including: method of
offloading from tank car or tank truck (air pressure or pump), the ability to reuse
dilute acid solutions which may be generated from the
scrubbing operation, and permitting requirements needed in order to discharge or
dispose of acidic solutions or other solutions generated as a result of the
scrubbing operation.
HCl Exposure Limits
NIOSH REL : 5 ppm (7 mg/m3)
OSHA PEL : 5 ppm (7 mg/m3)
IDLH (Immediately dangerous to life or health) : 50 ppm
Working principle
The recirculating scrubber and the packed column scrubber are the two scrubbing
systems used most commonly. The Recirculating Scrubber consists of a pump, lines,
eductor, scrubber tank, and sparger.
In this system, the fume eductor draws acid vapors from the storage tank. The acid
vapors are then absorbed by water being recirculated through the eductor.
The solution in the scrubber tank gradually builds strength up to a maximum of 15%
HCl. At this point, the weak acid solution should be removed for use or sent to an
appropriate hazardous waste treatment site.
The scrubber tank is then recharged with fresh water. No acid is lost and the fumes
from the hydrochloric acid are contained by the system.
In the Packed Column Scrubber water is fed into the top of a packed column and acid
vapors from the storage tank are fed into the bottom.
The acid vapors are removed from the air by scrubbing them with the countercurrent
flow of water. The air then vents out of the top of the scrubber and the weak acid
flows into a suitable chemical waste handling system.
Features
Air flow rate from 50 to 30000 CFM
Material of construction: PP, PP+FRP, MS, SS 304, SS 316
Scrubbing efficiency up to 99 % Lower shell serves as integral sump
for recycle of liquid
Spray nozzles accessible from top of unit
Entrainment separators prevent liquid carryover
Special multi-bed packing designs accommodate different scrubbing
solutions for removal of multiple contaminants
Chemistry of HCl with NaOH
Hydrochloric acid reacts with sodium hydroxide to form sodium chloride (the salt) and
water. Sodium chloride is made up of Na+ cations from the base (NaOH) and Cl- anions
from the acid (HCl).
HCl + NaOH → H2O + NaCl
Drizgas Tech provides the complete scope of services for fume
ventilation and scrubbing systems including the following:
Engineering & Design
Fume Scrubber Fabrication
Custom Hoods & Enclosures
Complete Ventilation Systems
Makeup Air Systems
System Installation & Start-up
System Upgrades & Repairs
Airflow Measurements & Balancing
Preventative Maintenance Programs
Applications
Steel and Mining industry,
Electric power plants,
Oil and gas extraction operations,
Oil refineries,
Pulp and paper mills,
Sewage treatment plants,
Large poultry farms ,
Portland cement kilns,
Municipal waste landfills,
Coke ovens,
Sulfur products and hydrogen sulfide production,
Asphalt production and storage etc.
Phone Number
+91 842 823 1593 | +91 995 287 7991
Email Address
sales@drizgas.com | info@drizgas.com
Office Address
No. 50, Villianur Main Road, Odiyampet, Puducherry - 605 110, INDIA