ADARSH ENGINEERS & SUGAR EQUIPMENT PVT. LTD.
C-124, MALEGAON M.I.D.C, SINNAR, NASHIK – 422103, PH: 02551-230182, Email-
adhire@rediffmail.com , info@adarshengg.com .
TECHNICAL COMMENTS OF 140 KG/HR SULPHUR BURNER
A) Size Calculation for following equipment
1) Melter: Raw Sulphur Density 1300/m3
Volume of Melter π÷4 x Diameter x Height
800 x 900 = .452 m3
- Volume of Heating Element 0.094 m3 = .358 x 1300 = 465/charge
raw Sulphur
2) Receiver: Density of Molden Sulphur 1800 m3
Volume of Receiver π÷4 x Diameter x Height
650 x 800 = 0.242 m3
Volume of heating element .06
0.182 m3 x 1800 density = 327 kg/charge capacity
3) VPC:cmarction volume require = 0.02 m3 / kg of Sulphur Burner
Cementing value – Diameter 25 +25 = 50 – 1180 = 1130
1130 x 3 Mtr = 3m3
Molden Sulphur volume .18 – 3m3 = 2.82 cmarction value require for 140 kg/hr Sulphur Burner
0.02 x 140 = 2.8 m3
4) After Burner: 5% burning of Sulphur vapors’is responded in after Burner
Cmarction volume required for after burner 0.02 x 140 x .05 = 0.14
Our after burner cmarction volume is .19 m3
5) Cool Scrub: cooling surface required for 140 kg Sulphur Burner = 18 m2 cooling surface
Quantity of so2 x temp. Drop x specific heat of so2
Delta T x heat transferorsqualifition UD 6 / hrs /sq foot/degree surface of cooling pipes
Cooling surface of cool scrub is 20 m3 this is ok for 250 degree temp. Reduce 70 degree Celsius
± 5 degree
B) Supporting structure of Melter & Melt Receiver: M.S. Chanel size 100 x 50 x 5 mm Thk – 4
Nos
And internal support with angle (M.S.) 40 x 5
C) MOC of all Parts M.S. as per mention in our drawing
D) MOC of Inter connecting pipes M.S. Sch-40 (Seamless) with table D flanges
E) PFD & P & ID For Sulphur Burner We will send same
F) Utility Requirement:
1) Air: 1 kg of Sulphur Burning air required 7 m3
7 x 140 = 980 m3
2) Cooling Water Required for Main Furnace, After Burner & so2 cooler 1.5 Ltr/Min
Note: We will send Foundation drawing & Loading Diagram very shortly
For ADARSH ENGINEERS & SUGAR EQUIPMENT PVT. LTD.
AN INNOVATIVE SULPHUR BURNER WITH IT’S
OWN L.P. STEAM GENERATOR USING EXOTHERMIC
HEAT PRODUCED DURING SULPHUR BURNING
ABSTRACT
This paper outlines the evolution of innovative & energy efficient Sulphur Burner in which waste heat is
gainfully extracted for the generation of L.P. Steam required for melting the solid Sulphur before being
fed to the Sulphur Burner.
1. Introduction
In conventional Sulphur Burners the heat / steam required for preparing the melt at around 130 °C to be
fed to the Sulphur burner, is supplied from the steam generated in the factory Boilers duly reduced at
pressure around 7 kg/cm²g. We now present here some details of a successfully worked Sulphur Burner
system wherein we have been able to melt the Sulphur to the desired temperature within the Melter &
then retain that temperature in the Melt Receiver at around 130°C, by the help of L.P. Steam produced
within the tubular heat exchanger type Vapouriser interposed between the After- Burner and Cooler-
Scrubber.
2. General Description of System and it’s Working
A schematic diagram of this innovative Sulphur Burner system (Patent applied for) is givenin fig.1. The
input to the heat exchanger type Vapouriser is the hot gases coming out of the After-burner at around
300-350°C. The outlet temperature of the gas from Vapouriser is around 250-300°C. The steam
produced in the Vapouriser is around 3 Kg/cm²g.
Initially while starting, the Vapouriser is filled with distilled water to a certain level, leaving adequate
space for steam to collect. Provision has been made to flush out air within the Vapouriser, Melter, Melt
Receiver, Feed Valves and the connecting pipings. Once the Sulphur Burner starts operation the
condensate is re-circulated within the system in a closed loop.
The Vapouriser is provided with electrical heating elements to produce steam for initial start-up of the
Sulphur Burner. As soon as the hot SO2 gas starts passing through the tubes of the Vapouriser and
sufficient heat is transferred through the heat exchanger, the heating elements are automatically
switched off.
3.order to run Vapor system successfully following particulars are to be taken
1. Moisture free air should be supplied to sulphur burner. If we do not supply Moisture free air, water
vapor will react with some SO 3 produced during burning of sulphur, it will produce sulphuric acid and
corrode all the internal So 2 piping.
2. Temperature indicator shall be supplied on After Burner and it should be working.
3. We keep secondary air valve slightly open. Secondary air of 60 degree temperature mixes with So2
gas coming from combustion chamber(VPC). The temperature of this gas is about 350 degree C and
therefore temperature indicator at outlet end of After Burner will indicate average temperature of gas
leaving it. If So2 gas leaving VPC contains unburnt sulphur vapors, then these sulphur vapors start
burning with the help of secondary air and temperature indicator fitted to After Burner shows higher
temperature. So whenever we observe that VPC temperature is constant and After Burner temperature
is increasing, it indicates that sublimation is taking place.
4. To prevent the above situation we have to do following things.
a)Reduce bubbling air valve going to VPC
b)Reduce air valve which pushes slag further
c) Even though above situation exists, it means that air coming to Sulphur Burner is less and air
filter of air compressor is choked. Then we have to clean the the strainer. We have supplied
about 30 such units in India
4. Conclusion
Thus it is seen that the Sulphur Burner system does not require energy from the Sugar factory Boilers
(except for start-up), because the system uses the heat supplied / evolved during the exothermic
reaction during Sulphur burning within the system itself. Thus there is no need for an external source of
steam supply at 6-7 Kg/cm²g-PRD station etc. for the Sulphur Burner.
It is hoped that the various factories using the system will give their experience of working the system.
BIBLIOGRAPHY: E.HUGOT Handbook of Cane Sugar Technology, 3rd edition 1986. Elsevier: Amsterdam
page, (407). [Exothermic heat release]
