AIR POLLUTION CONTROL FROM RICE SHELLERS- A CASE STUDY Presented by: Dr S.M Ahuja, Associate Professor, SLIET,Longowal, india

RICE SHELLER LAYOUT

POLLUTION FROM PADDY SILO AvseqRICE01_split001.mpeg SOURCES OF DUST EMISSIONS

SUCTION FROM ALL THE DUST EMISSION POINTS NO. OF POINTS  PADDY SILO2  ELEVATORS1  FAN OVER SCREENS CONTAINED IN A WOODEN BOX1  SCREENS2  HUSKERS3  PADDY SEPARATOR1 TOTAL 10 TOTAL 10 AvseqRICE02_split001.mpeg

CONTAINMENT OF DUST  COVERING OVER HUSKERS (FRONT)  COVERING OVER HUSKERS (BACK)

HOODS

SUCTION FROM DIFFERENT POINTS

COVERINGS

CONTAINMENT SYSTEM  COVERING BY INSTALLING SUITABLE HOODS / ENCLOSURES WHILE ENSURING WORKABILITY.  DUCTING USING PLASTIC PIPE SO THAT PRESSURE DROP IS MINIMAL.  EFFECTIVE SUCTION USING I.D. FAN.  ID FAN SPECIFICATION  AIR FLOW RATE-4000 CUBIC METER PER HOUR AT 25 degC  PRESSURE DROP-6 INCHES OF WATER  DUST CONCENTRATION 3600 mg/Nm3

ISOMETRICISOMETRIC VIEWVIEW

SAILENT FEATURES OF CYCLONE SEPARATOR

AIR POLLUTION CONTROL DEVICE  CRITICAL ANALYSIS OF DUST  PARTICLE DENSITY- 1.8 grams/cc  MEDIAN AERODYNAMIC DIAMETER- 14 micrometers  BASED ON COMPUTER-AIDED DESIGN (CAD) OF CYCLONE SEPARATOR  LEITH-LICHT MODEL FOR ESTIMATING EFFICIENCY  IOZIA-LEITH MODEL FOR ESTIMATING PRESSURE DROP  KALEN-ZENZ MODEL FOR OPTIMIZATION  UNIQUE DIMENSION RATIOS  ESTIMATED DUST COLLECTION EFFICIENCY- 93%  OVERALL DUST COLLECTION EFFICIENCY- 94%  DUST LOAD- 250 Kg OF DUST DAILY  750 TONS DUST COLLECTED DAILY FROM RICE SHELLERS OF PUNJAB (ABOUT RICE SHELLERS IN INDIA)

CYCLONE SEPARATOR DUST.mpeg

COMPARISON WITH OTHER TECHNOLOGIES  COST EFFECTIVE  NO ADDITIONAL MOTOR REQUIRED.  HP REQUIRED -3 TO 4  HP REQUIRED-15  SINGLE HIGH EFFICIENCY CYCLONE INSTEAD OF TWO CYCLONE SEPARATORS AND A BAG HOUSE

ECONOMIC GAINS DUE TO ADOPTION OF THIS TECHNOLOGY  IMPROVEMENT IN THE QUALITY OF BRAN.  INCREASE IN THE LIFE OF RUBBER ROLLS.  INCREASE IN THE LIFE OF SHELLING MACHINERY  CUMULATIVE BENEFIT RS. 100,000/- PER SEASON  PAY BACK PERIOD LESS THAN A SHELLING SEASON.

RICE SHELLER WITH APCD ROTARY AIR LOCK HOOD OVER PADDY SILO

EMISSION STANDARDS FOR RICE SHELLERS  EMISSION STANDARDS FOR SPM (mg/Nm3)- 750* * THE EXISTING UNITS NOT MEETING THE PRESCRIBED SITING GUIDELINES WILL MEET A STACK STANDARD OF 500 mg/Nm3.

IRREGULARITIES IN THE INDUSTRY  WRONG ROTARY AIR LOCK  IMPROPER CENTRAL TAPER MANIFOLD

CONTINUED: CYCLONE SEPARATOR WITHOUT ANY HOPPER AND ROTARY AIR LOCK

PRECAUTIONS/TROUBLE SHOOTING  PROPER DRYING OF PADDY.  USE OF INSULATED HEATING TAPES IN CASE OF UNAVOIDABLE REASONS.  MANOMETER FOR MEASURING PRESSURE DROP.  REPLACEMENT OF BAGS FITTED BELOW THE ROTARY AIR LOCK.

REPLICATION OF THE TECHNOLOGY  DEMONSTRATION POLLUTION CONTROL UNITS PARTIALLY FUNDED BY SMALL SCALE INDUSTRIAL DEVELOPMENT BANK OF INDIA.  TECHNOLOGY APPLIED UNITS  RETROFITTED 250 APCDs (CYCLONE SEPARATORS) BY PROVIDING COMPUTER AIDED CUSTOMISED DESIGNS FOR INDIVIDUAL INDUSTRY  TECHNOLOGY HAS ALSO BEEN APPROVED BY PUNJAB POLLUTION CONTROL BOARD

THANKS