Shola is a cellular multitubular indirect air heater specially designed for the Tea Industry.   The Salient features of this heater are  the double vertical rows of tube on either side of the grate, which aids in either 3 pass or 5 pass  of  the  flue gas. These heaters can be fired with coal, leco, firewood, gas or oil.

In  the  Shola  heater  hot  flue  gases  drawn   by an induced draught created over the grate by the ID fan & chimney pass though 2 vertical rows of tube-bundles on either side of the grate and overcast surfaces. Ambient fresh air drawn from the sides, back  and top by the dryer fan, picks  up  heat  from  heated  surfaces and enters the drying chamber. The principle  of  both  3 pass  and  5  pass is the same except that in 5-pass  hot air is made to pass five times in the tube banks as against 3 times in the 3 pass.




Tube Banks - Shola  heaters  are  fitted  with  tube  banks  instead  of individual tubes. Each tube banks consists  of  2  smaller  banks, which are flanged together. Each of these smaller tube banks consists of 5 tubes. The number tube bank varies according to the size of the heater.

Foundation - The  heater can be erected on 9” thick rigid concrete raft on solid earth and no excavation
is required. So heater can be erected without any time loss.

Draft System - Shola  heaters  are  designed  to   handle  both  Induced  and  Forced  air  draughts. For Maximum  efficiency,  the  fans are  specially  designed with  aerofoil  impeller blades,   which  deliver  the required quantum of hot air with low power consumption.

Mechanical Stoking - Shola  heaters  can  be  conveniently  fitted  with mechanical  stokers for uniform feed of coal. This helps to maintain the temperature as well as reduce coal consumption.

Code
Mark II
Super
Special
Major
Code
Standard
5 Pass
Standard
5 Pass
Standard
5 Pass
Standard
5 Pass
Arch bars B+C+F
(L.H. & R.H.) qty
2+16+2
2+16+2
2+16+2
2+16+2
2+16+2
2+16+2
2+16+2
2+16+2
WIDTH (MM)
4270
4270
4270
4270
4270
4270
4270
4270
LENGTH (MM)
5223
5353
5312
5442
5687
5847
6040
6040
HEIGHT (MM)
2640
2640
3021
3021
3450
3450
3450
3450
Tube Bundles
2 C.I.
+
2 C.I.
2 C.I.
+
2 M.S.
2 C.I.
+
2 C.I.
2 C.I.
+
2 M.S.
2 C.I.
+
2 C.I.
2 C.I.
+
2 M.S.
2 C.I.
+
2 C.I.
2 C.I.
+
2 M.S.
Vertical Row
4 Row
4 Row
4 Row
4 Row
4 Row
4 Row
4 Row
4 Row
Bundles per Row
6 C.I.
6 C.I.
+
3 M.S.
8 C.I.
8 C.I.
+
3 M.S.
10 C.I.
10 C.I.
+
3 M.S.
10 C.I.
10 C.I.
+
3 M.S.
Total Bundles
24 C.I.
12 C.I.
+
6 M.S.
32 C.I.
16 C.I.
+
6 M.S.
40 C.I.
20 C.I.
+
6 M.S.
40 C.I.
20 C.I.
+
6 M.S.
Grate Area (M2)
0.97
0.97
0.97
0.97
1.27
1.27
1.51
1.51

Coal Burning
Capacity per Hour

A. With Mechanical     Stoker (kgs)
170
170
170
170
225
225
225
225
B. With Hand Stoking     (kgs)
130
130
130
130
170
170
200
200

Heat Generated
(Kilo Calorie) per hour
at 5000 K/Cal per
kg of coal
A. With Mechanical     Stoker
850000
850000
850000
850000
1125000
1125000
1325000
1325000
B. With Hand Stoking
650000
650000
650000
650000
650000
650000
1000000
1000000
Air Required to Burn
Coal
A. With Mechanical     Stoker (CFM)
3000
3000
3000
3000
4000
4000
5000
5000
B. With Hand Stoking     (CFM)
2300
2300
2300
2300
3000
3000
3800
3800


Multiple Models - Shola  heaters comes in 4 different sizes with both 3 pass & 5 pass. The biggest model Shola Major produces usable heat of 10.5 Lac Kcal/hr

Better Heat Transfer - Shola  heaters  are  specially  designed  for  better  heat  transfer.  Shola 5 pass heater’s efficiency varies from 55 - 65% depending on model.

Low power & coal consumption - Due to  better heat transfer the coal consumption per Kg of made tea is only 0.6 Kg & power consumption is also less by 25% in 5-pass heater, under normal condition.

Better retention of heat - Shola  heaters  are  constructed with  better  and  high quality heat resistant materials, so heat loss is very minimal.

Long life of Castings - All  parts exposed  to  direct heat are made  of special superior castings, so they last much longer.

No Maintenance - Since there are no moving parts, maintenance is very minimal except cleaning of tube banks.
Easy & quick Installation - No excavations and no foundation bolt are required, since there is no moving parts. The heater can be erected on 9” thick rigid concrete raft on solid earth.

Versatile - Shola  heater can be  coupled  with any type of heater and it can fired with any type of fuel.