COMMITTEE ON ENVIRONMENTAL AFFAIRS PCEA 21 November 2018 Sasol is committed to compliance with all applicable laws including air quality within the remit of the recently amended framework and MES ID: 930453
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Slide1
PARLIAMENTARY PORTFOLIO COMMITTEE ON ENVIRONMENTAL AFFAIRS (PCEA)
21 November 2018
Slide2Sasol is committed to compliance with all applicable laws including air quality
within the remit of the recently amended framework and MES
Our
abatement technology implementation roadmaps are targeting to meet the new plant standards by 2025 except for boiler plant SO2 We are making good progress with our air quality roadmaps and improvement can already be demonstratedWe have made substantial progress since the last engagement with the PCEA in February 2018 in the following areas:Particulate matter (PM) abatement (Secunda and Sasolburg boilers)Oxides of nitrogen (NOx) (Sasolburg boilers)Volatile organic compound (VOC) abatement (Secunda site)Sulphur dioxide (SO2) alternative technology screeningOur multi year offset programme to address sources of non industrial pollution in conjunction with our roadmaps are progressing well
What you will hear today
Slide3Our plants are unique and complex with a highly integrated
value chain
MARKETING AND SELLING OF PRODUCTS
It incorporates diverse and complex unit operations governed by many different categories of the minimum emission standards
Slide4Our Secunda and other site operations
are governed by many different categories of the minimum emission
standards
1.1 steam plants1.4 gas turbines2.1 refinery (heaters)
2.2 refinery (SCC)
3.3 refinery (tar distillation)
2.4 tanks and VRU stack
2.5 waste recycling facility
3.3
Carbo
tar
3.6 Synthetic gas production and clean up.
Gasification
Gas liquor separation
Coal tar filtration
Rectisol
Sulphur recovery
4.2
Catalyst manufacturing – rotary kilns
4.7
Catalyst manufacturing – electric arc furnaces
5.1 Coal processing
3.6 & 7.1
Phenosolvan
7.2 Wet sulphuric acid
8.1 Incinerators
2.1 Polymers’ furnaces
2.1 Solvents octane regenerator & heaters
6 Chemical tanks
7.2 Nitric acid plant
7.3 Ammonium plants
Similar to conventional
power
station such as Eskom
Slide5Our
air quality roadmaps aim to enable compliance
with new plant standards by 2025
Tar value chain phase 1
Regenerative thermal oxidisers
Vapour recovery unit
Regenerative thermal oxidisers
Goal 2025
Compliant with new plant
standards,
except
for boiler SO
2
2017
Sewage solids
incinerator decommissioned
2016
Vapour
recovery unit compliant
2017 Tar value chain
phase
one compliant
2020
Meet roadmap commitments
Projects completed to date align with our environmental roadmap commitments
2018 progress
Sasolburg
Piloting LNB on boiler
Refurbished two ESPs
Secunda
Installed 3 ESP enhancement technologies
Installed abatement on coal tar
naphta
tank
LNB = Low nitrous oxide burner
ESP = Electrostatic precipitator used for particulate matter abatement
Slide6Abatement technology implementation roadmap is progressing well towards meeting new
plant standards by 2025.
Progress made since last engagement with PCEA |
Particulate Matter (PM) abatementIn Secunda, we are in the process of evaluating three different types of technologies with the aim of improving the efficiency of the existing electrostatic precipitators (ESPs)Installed medium frequency transformers on boiler 2 west in Secunda in July 2018Installed high frequency transformers on boiler 1 west in Secunda in June – July 2018Installed high frequency short pulse transformers on boiler 4 west in Secunda July – August 2018. Further improvement by installing sneak plates is plannedEfficiency evaluation of the three technologies is in progress to inform further roll outIn Sasolburg, we are refurbishing electrostatic precipitators
and t
he
refurbishment of ESPs on two boilers have been completed
PM abatement achieved through the use of electrostatic precipitators
Slide7A variety of sources impact ambient air quality
Particulate matter (PM)
Sulfur dioxide (SO
2
)
Oxides of nitrogen (NOx)
MES
Water vapour
Particulate matter (PM)
Sulfur dioxide (SO
2
)
Oxides of nitrogen (NOx)
MES
Water vapour
Slide8The PM
concentration measured in
2018
around Secunda indicate an increase during the colder months
Slide9Progress made since last engagement with PCEA | Oxides of nitrogen (NOx
) abatement
The challenges with low
NOx burner retrofits include a wide variety of variables. Therefore we first test the technology on a single boiler before rolling out to subsequent boilersSome of these challenges include:Low NOx burners are very sensitive to getting the air to fuel ratio’s and particle size distribution correct. Convectional type coal burners are not as sensitive to air and fuel imbalances Accurate measurement and control of both fuel and air (primary and secondary) to the boiler – for a plant with old control systems, this is a significant challengeCorrect particle size distribution (size of the coal particles being burnt) is critical in order to enable stable flame conditions - the pulverisers installed (coal mills) require modifications
Sub-optimal LNB installations can result in increased
unburnt carbon in ash. Boiler efficiency decrease
(reduced steam) which
require more coal and
increase the loading of PM
in the
electrostatic precipitators (ESP’s)
Slide10Low NOx burner flame management
Slide11Progress made since last engagement with PCEA | Oxides of nitrogen (NOx) abatement
Piloting of LNB on a boiler in Sasolburg
Operations
Boiler set-up and commissioned and initial NOx emissions reduction of ~20% after LNB installation achieved. A reduction of ~45% is requiredAnalysis showed that the Sasolburg coal ignition and combustion occurs outside of influence of installed LNBRequires that further retrofitting must be done to change the air flow in the boiler and ensure that combustion occurs near the burner mouth
Specialized computer
modelling
is required to determine exact flame profile after LNB installation.
After
the implementation of
LNB, an
iterative process of mill plant optimization, air plant optimization and low
NOx
burner
adjustments is required to achieve desired boiler operation and reduced
NOx
emissions
Slide12Progress made since last engagement with PCEA |
V
olatile
organic compound (VOC) emissionsRoadmap to achieve 80% reduction target is progressing wellAdditional point sources connected to regenerative thermal oxidisersFloating discs installed on two coal tar naphtha tanks (September 2017 and on second tank in September 2018)
Slide13While close to meeting new plant standards for SO
2 we are assessing our ability to conform to the new standards
13
Slide14A variety of sources impact ambient air quality
Particulate matter (PM)
Sulfur dioxide (SO
2
)
Oxides of nitrogen (NOx)
MES
Water vapour
Slide15The monthly average SO2
concentration in 2018 measured around Secunda is below the National Ambient Air Quality Standard
Slide16Screening is based
on the following criteria
Sasol follows a rigorous process to evaluate technical solutions
Slide17Status of technology screening (based on previous new plantstandard)
Technology
Novel Integrated Desulphurisation –
CaO
/ Ca(OH)
2
Dry Sorbent injection
(DSI)
CaO
/ Ca(OH)
2
DSI -
NaHCO
3
Indicative impact
Plot space requirements
Integration with existing process
Water demand
Not assessed yet
Electricity requirements
Rail
infrastructure and storage
Waste
disposal
Slide18While
flue gas desulphurisation technology
is proven, it would be
significantly challenging to retrofit on our process on our brownfield site in addition to the adverse water and waste impacts New plant footprint
Slide19There exists an opportunity for industry to alleviate non industrial sources through offsets
Our
multi year offset programme to address sources of non industrial pollution in conjunction with our roadmaps are progressing well
Particulate matter (PM)
Sulfur dioxide (SO
2
)
Oxides of nitrogen (NOx)
Particulate matter (PM)
Sulfur dioxide (SO
2
)
Oxides of nitrogen (NOx)
MES
Water vapour
Slide20Contracting with households and insulation of RDP homes with coal stove swap commenced in January 2018 in eMbalenhle and Lebohang
Local management unit offices established in eMbalenhle and Lebohang to assist with the implementation
Eight
small, medium and micro-sized enterprises are employed to undertake various activitiesSince January 2018, 1 179 homes were completed in Lebohang and eMbalenhle. Liquid petroleum gas (LPG) package comprises of a four plate gas stove and gas heater
Slide21Contracting with households and insulation of RDP homes in
eMbalenhle and Lebohang
Typical RDP home
Ceiling spayed Ceiling board fitted Painted ceiling→→
Slide22Three additional ambient air quality monitoring stations were installed at eMbalenhle and Lebohang in 2017 and are now
fully functional
Analysers in the monitoring stations
Buyani primary school (eMbalenhle
north)
KI
Twala
Secondary school (eMbalenhle south)
Chief
Ampie
Mayisa
Secondary school (Lebohang).
Instruments are measuring particulate matter and
sulphur
dioxide, amongst others
Slide23Door-to-door campaign at eMbalenhle and Lebohang to create air quality awareness and understanding is ongoing
Geographical areas targeted in eMbalenhle and Lebohang
Typical awareness flyer
Awareness assessment
Six air quality related topics will be shared with the communities over a period of
2 years
.
Flyers were developed.
Field workers are trained on each topic to engage with the communities
Assessment of understanding on air quality
related matters is ongoing
Fieldworker explaining a topic
Community members holding their flyers
Slide24Twenty seven primary schools in Govan Mbeki Municipality are targeted.
Department of Basic Education and principals were engaged in developing preferred activities.
Grades 1 - 4 : Puzzles and coloring competitions
Grades 5 - 6 : Quizzes and dramaGrade 7 : Debates and projectsMaterial was distributed to all primary schools in July / August 2018 and are being used in the schools.Education and awareness campaign on air quality at primary schools
Completed activities at Kinross and Sidingulwazi primary schools
Slide25Sasol implements veld fire management to reduce particulate matter emissions
Preparation of firebreaks
Cutting grass in eMbalenhle, Secunda and the factory’s secondary area and around coal conveyer belts by using local small, medium and micro-sized enterprises
Reporting of incidents Area of cut grass190 000 m2
Area of cut grass
80 000m
2
Area of cut
grass
50
000m
2
Area of cut grass
780 000m
2
Slide26Sasolburg
and Natref |
Non-recyclable waste project
Removal of illegal dumps and replacement with a skip
bin (9.8
tonnes of waste removed to date)
Illegal dump site
Waste being cleared away
Cleaned-up site prepared for skip placement
Skip in place to ensure a cleaner community
Slide27Sasolburg and Natref | Non-recyclable waste project
We are planting 200 trees next to the placed skips
Slide28Sasolburg
and
Natref | Veld fire management project
The
rapid response vehicle being handed over to the Municipality.
The
vehicle is being employed to actively fight fires in the community
Delivery of the rapid intervention vehicle
Slide29Sasolburg
and
Natref |
Vehicle emission testing project
Practical session to test vehicles near
Sasolburg
Slide30Sasolburg Air Quality Offsets p
rogress on projects
Non-Recyclable Waste Removal
Veld, Waste And Shack Fire Prevention Proudly NatrefHanding over a certificate listing all the donated equipment to the Mayor of MLM; The compactor truck used
to service the skips
and the
replacement
skip bins that
are donated to MLM for the
community.
A
6 000L
support fire tanker
Grass Cutting Equipment
Slide31Our
plants are unique and complex with a highly integrated value chain, governed by many different categories of the minimum emission standards
Sasol is committed to compliance with all applicable laws including air quality laws
Our abatement technology implementation roadmaps are targeting to meet the new plant standards by 2025 except for boiler plant SO2 We are making good progress with our air quality roadmaps and improvement can already be demonstratedMulti year offset programme addresses sources of non industrial pollution in conjunction with our roadmapsConclusion