Acid Gas Scrubber for Multi-Pollutant Reduction - Emission Control and Measurement Workshop pot

Boiler ESP # 1 ESP # 2 Heat SCR SOx De- Stack No Control of Particulate, SOx or NOx during Boiler Bypass THE OLD APPROACH IS: •COSTLY •USES TOO MUCH PRECIOUS REFINERY SPACE •IS SUBJECT

Nicholas Confuorto

Belco Technologies Corporation

Acid Gas Scrubber for

Multi-Pollutant Reduction

Emission Control and Measurement

Workshop March 24-25, 2010

subsidiary of DuPont

Boiler

ESP # 1 ESP # 2

Heat SCR SOx De- Stack

Boiler

ESP # 1 ESP # 2

Heat SCR SOx De- Stack

(No Control of Particulate, SOx or NOx during Boiler Bypass)

THE OLD APPROACH IS:

•COSTLY

•USES TOO MUCH PRECIOUS REFINERY SPACE

•IS SUBJECT TO TOO MUCH MAINTENANCE AND POSSIBLE DOWN TIME

•DOES NOT PROVIDE POLLUTION REDUCTION DURING BOILER BYPASS

Boiler

ESP # 1 ESP # 2

Heat SCR SOx De- Stack

(No Control of Particulate, SOx or NOx during Boiler Bypass)

The Multi-Pollutant Approach To Pollution Controls

Boiler BELCO’s

EDV System

(Pollutants Controlled even during Boiler Bypass)

•Less Space Required

•Lower Cost

•Higher Efficiency

•Highest Flexibility

•Higher Reliability

•Full control even during boiler bypass

•Can change with your requirement

FCC

Particulate, SOx and NOx combined

EDV ® Wet Scrubbing System

Reducing Particulate, SO 2 , SO 3 and NOx in a single vessel

Loads Even FCCU Upsets

‹ Modular & Integral

pollutants

EDV ® Wet Scrubbing Advantages

Step 1 – Flue Gas is quenched and

saturated in the Quench Section

The EDV® Quench Section

Quench Section

• Designed to fully saturate gas

Wet/Dry interface

the full regenerator temperatures

Particulate Control is achieved

in the Absorber Section

The EDV® Absorber Section

Absorber Section

Absorber Spray Section

The EDV® Absorber Spray Section

Cross-Section

The EDV® G® Nozzle

The EDV® G® Nozzle

Cross-Section

15

particulate (PM 2.5 and below)

Filtering Modules

Multiple Modules in Each Scrubber

Efficient and Reliable Fine Particulate Control

Condensation &

Agglomeration of Fine Particulate & Sulfuric

Liquid to Spray

EDV® 5000 Filtering Module

Efficient Fine Particulate Control

Fine Particulate

Fine Particulate Encased in large

water droplet

Step 4 – Removal of entrained droplets

prior to exit through stack

EDV® Wet Scrubbing System

Droplet Separators

Step 5 – Treatment of Scrubber Purge in

Purge Treatment Plant (PTU)

Purge EDV ® Treatment Wet Scrubbing Unit

Liquid Draining to Sump is pumped back to Clarifier

Coagulant and/or

Flocculent

Solution(s)

Caustic Addition for pH control

Concrete Pad with Sump

SETTLING BINS

Liquid Draining to Sump is pumped back to Clarifier

Caustic Addition for pH control

Concrete Pad with Sump

Purge EDV ® Treatment Wet Scrubbing Unit

SETTLING BINS

Liquid Draining to Sump is pumped back to Clarifier

Coagulant and/or

Flocculent

Solution(s)

Caustic Addition for pH control

Concrete Pad with Sump

Purge Treatment Unit

EDV® Purge Treatment Unit (PTU)

NO x Reduction with EDV ® + LoTOx TM

Low Temperature Oxidation

from The BOC Group

z Greater than 90% reduction of NOx is achieved

application was in May 2006 Many installations since then

EDV Wet Scrubbing

Spray Tower for LoTOx TM

z Ozone Injection after Quench

z Conversion to N 2 O 5

is achieved

catalyst poisoning, deactivation, sintering and no

even during boiler bypass

LoTOxTM is sold to refineries worldwide by BELCO ®

under license from The BOC Group

LoTOxTM Ozone Generator

LoTOxTM data -Medical College of Ohio

Performance of LoTOx System at MCO

December 6, 2001 Outlet NOx Setpoint = 5 PPM Changed to 10 PPM

0 10 20 30 40 50 60 70 80

0:00:

00 0:52

:00 1:44:

00 2:36:003:28:

00 4:20:

00 5:12:

00 6:04

:00 6:56:

00 8:45:159:37:

15 10:2

9:15 11:21:1

5 12:1

3:15 13:05:

15 13:5

7:15

14:49:

15 15:4

1:15 16:33:

15 17:2

5:15 18:17:

15 19:0

9:15 20:01:1

5 20:5

3:15 21:45:

15 22:3

Flue Gas Temp = 179 - 234 F Scrubber Temp = 75 - 100 F Inlet SOx = 74 - 178 ppm Inlet CO = 150 - 300 ppm

Inlet NOx

Flue Gas Flow

Outlet NOx

LoTOxTM data – Refinery FCCU

0 10 20 30 40 50 60 70 80

10 ppm NOx set point

Demonstrated Performance

Simplified PFD

models only)

EDV ® Caustic System PFD

DIRTY FLUE GAS FROM FCC

CLEAN GAS OUT

PURGE TREATMENT UNIT

EDV QUENCH

EDV ABSORBER

FC

EMERGENCY OVERFLOW

models only)

EDV ® Scrubbing System PFD

DIRTY FLUE GAS FROM FCC

EDV ABSORBER

CLEAN GAS OUT

pHC

pHC

CAUSTIC

PURGE TREATMENT UNIT

EDV QUENCH

LoTOx TM Injection

OZONE GENERATOR

02

03

EDV® scrubbing with LoTOxTM Process

Ozone Injection Grid in Quench Section

Liquid Discharge elimination using the

BELCO LABSORB TM System

z Only product from regeneration is a

concentrated SO2 stream that is then converted

to elemental sulfur or sulfuric acid

z Reduces load on Waste Water Treatment Plant

z Reduced Reagent Cost (Caustic)

z Enhanced Recovery (Sulfur)

Basics - Regeneration Side

ƒ Buffer Regenerated using Evaporation with low pressure steam

ƒ Sulfates and heat stable salts formed from SO3 and

oxidation of SO2 are removed as a solid by a patented process

ƒ Less than 3% buffer loss

ƒ Installed 9 years ago as

SRU tail gas treater at a

GAS OUT

GAS IN From FCCU

LC

Make-Up

Water

Pre-Scrubber Purge to Clarifier

PRE-SCRUBBER

FC

FILTERING MODULES

DROPLET SEPARATORS

DROPLET SEPARATORS

1 1

2 2

3 3

Lean Buffer From Regeneration Plant

Regeneration Plant

Regeneration Plant

Plant

Polishing-Scrubber Built inside stack

CW CONDENSER

35 PSIG

MIXING TANK

STRIPPER CONDENSATE TO SULFATE REMOVAL 50%NaOH

85% H3PO4

cw BUFFER TO

SULFATE REMOVAL

COOLER

“SINGLE EFFECT” EVAPORATION

QUESTIONS?