CTC represents Curl, Tear and
Crush, while it reflects the
technology of making tea. CTC
tea making is mainly to destroy
the structure of tea through
machinery to shorten the time of
fermentation, reduce the loss of
tea quality, ensure the quality
of tea and form granular while
destroying the structure of tea.
The fermentation time of CTC
black tea has shortened by 50%
in comparison with traditional
black tea and at the same time
its inherent quality increases
significantly with fresh red
color of tea of strong
concentration, with rapid
making. Therefore, CTC black tea
has become a major product in
international black tea market.
Type CTC-914 complete set of
equipment for processing
fragment black tea is the first
set of tea processing equipment
developed by Yunnan Agricultural
Machinery Research Institute,
with integration of
completeness, continuation and
course and fine processing into
an organic whole. This
production line consists of a
vibrating and cleaning machine,
a rubbing and crushing machine,
a triplex rolling and crushing
machine, a ventilating
continuous fermentation machine,
an air-flow type fluidized-bed
drying machine, a complete set
of electrostatic rubbing and
stemming machines (including 1
set of Type 135 stemming machine
and 2 sets of Type 99 stemming
machines) and an auxiliary
belt-conveyor. This production
line can treat 1,000kg to
1,200kg of fresh tea leaves per
hour and make 300kg of dry black
tea per hour, with moisture
content below 6.5% for the
processed dry black tea.
CTC products Show
CTC
Tea
Soup of CTC
There is no strict restriction
in grading for raw material for
CTC fragment black tea. However,
there must be no of wood nature
for tea, fresh tea leaves should
be withered and dehydrated by
means of spreading them out for
cooling on a withering bed, with
ventilation below the withering
troughs to avoid the tea heated
and deteriorated. The moisture
content of the processed tea
should be below 85%.
The fresh tea leaves after
withering cannot directly enter
into the rubbing and crushing
machine for processing. It
should be cleaned through a
vibrating and cleaning machine
to remove small stones, tea tree
stalks and metal articles mixed
with the tea leaves when picked
up, and with some small
non-uniform leaves with poor
nutrient being picked out. The
fresh tea leaves after cleaned
will enter into the cylinder of
the rubbing and cleaning machine
and will be crushed into broken
pieces by means of rubbing and
crushing actions of both moving
and static cutters to make
preparation for next processes.
Then, the tea will enter into
the triplex rolling and crushing
machine to form granular tea,
all performed respectively by
means of three groups of toothed
rolls in succession. This is the
most critical step influencing
the quality of tea and its
granular formation. Each group
of toothed rolls consists of
fast and slow rolls. While
rolling and crushing, the tea
leaves are rubbed and curled
into granular. After this
process, the tea will be
fermented on two punched
conveyor belts providing
ventilation and supplying oxygen
to the tea through a blower with
hot wind provided during cold
weather. With the action of
certain time, temperature and
humidity as well as mechanical
movement, the tea gradually
becomes red and brown. After
fermentation, the tea enters
into the air-flow type
fluidized-bed drying machine
where with the action of hot air
the tea will boil over on the
bed surface of the drying
machine and move toward the
outlet. During this process, the
tea loses its moisture and turns
dry, while the composition of
the tea will not change any
more. The dried tea has many
ribs and thin hairs that should
be picked out through the
stemming machine. Through the
friction between a wool felt and
a PVC cylinder, the stemming
machine can pick out tea stems
and other foreign matters and
confirms the grades of the tea.
Major Technical Targets
1.
Production Capacity: Treating
standard fresh tea leaves of
1,200kg/h (producing dry black
tea of 300kg/h).
2. Power of Part of Special
Machines: Approx. 150kW.
3. For the complete set of the
equipment, we execute SB222-1985
“Common Universal Specification
for Food Machinery: Basic
Technical Requirements”,
SB223-1985 “Common Universal
Specification for Food
Machinery: Technical
Requirements of Machinery
Processing” and SB224-1985
“Common Universal Specification
for Food Machinery: Technical
Requirements of Assembly”. The
quality of the processed black
tea products are in conformity
with the standard of fragment
black tea in China, i.e.
GB/T13738-1997 “The First Set of
Fragment Black Tea”.
4.
The total area occupied by the
equipment: 1,350m2.
5.
Number of operators: Not less
than 15 persons per shift.
Equipment
Details of CTC
Production Line
List of Major
Equipment and Their
Quotations
|
No. |
Name of
Equipment
|
Major
Technical
Targets |
External
Dimensions |
Installed
Power |
Quantity
(set) |
|
1 |
Vibrating
&
cleaning
conveyor |
The
transmitting
capacity
is
1200kg/h
and the
diameter
of
sieves
for
cleaning
and
choice
is 10mm. |
6000×1000×2000 |
1.5kw |
1 |
|
2 |
Rotovane |
Stainless
steel
material
is used
for the
contact
surface
between
the
moving
cutter
and the
static
cutter
as well
as
between
the
internal
wall of
the
cylinder
and the
tea. The
inner
diameter
of the
cylinder
is
380mm. |
2600×950×1500 |
18.5kw |
1 |
|
3 |
Triplex
CTC
rolling
and
rushing
machine |
(1)
The
width of
the
working
tooth
surface
is
914mm;
(2) The
rotation
speed of
the fast
roll is
720 rpm
and the
speed of
the slow
roll is
72 rpm;
(3) The
diameter
of the
toothed
ring is
between
162mm
and
210mm. |
12000×22000×1900 |
60.5kw |
1 |
|
4 |
Continuous
fermentation
machine |
(1) The
belt of
conveyor
is the
punched
rubber
belt of
food-class;
(2) The
surface
of the
blowing
bed and
other
surface
contacting
with tea
are made
of
stainless
steel
material. |
25000×3800×2300 |
16.65kw |
1 |
|
5 |
Static
fluidized-bed
drying
machine |
The
surface
of the
fluidized
bed is
made of
food-class
stainless
steel
with an
area of
8.6m2. |
10000×3800×7000 |
42.12kw |
1 |
|
6 |
Type 135
electro-static
rubbing
and
stemming
machine |
The
length
of the
friction
cylinder
is
1350mm.
The
diameter
of the
friction
cylinder
is
135mm.
Two
outlets
for
outputting
tea are
provided. |
4500×1900×1850 |
1.5kw |
1 |
|
7 |
Type 99
electro-static
rubbing
and
stemming
machine |
The
length
of the
friction
cylinder
is
990mm.
The
diameter
of the
friction
cylinder
is
135mm.
Seven
outlets
for
outputting
tea are
provided. |
4250×1800×1400 |
0.75kw |
2 |
Complete Set of
Auxiliary
Maintenance
Equipment
|
No. |
Description |
Major
Technical
Targets |
Quantity
(set) |
Remarks |
|
1 |
4 ton/h
industrial
boiler |
Evaporation
capacity:
4 t/h |
1 |
Gas type
(includinginstallation
fee) |
|
2 |
Heat
exchanger |
|
8 |
To
construct
according
to site
requirements |
|
3 |
Ventilating
machine
for
withering
troughs |
|
25 |
|
|
4 |
Belt
conveyor |
Width:
600mm |
4 |
To make
complete
sets
according
to site
requirements |
|
5 |
Repairing
and
polishing
machine
for
toothed
rolls |
|
1 |
|
|
6 |
A
complete
set of
repair
tools |
|
1
complete
set |
|
|
7 |
Standby
toothed
roller |
914 mm |
6 |
|
Complete Sets of Equipment
(Provided by Clients)
|
No. |
Description |
Requirements |
|
1 |
Factory
building |
The area
of the
production
workshop
is
required
to be
500m2
(excluding
warehouse,
withering
workshop
and
boiler
workshop),
with a
height
of 4.5m
for 350m2
of the
area and
a height
of 9m
for
drying
workshop
(approx.
150m2). |
|
2 |
Withering
house |
It
depends
on
climate
conditions
of
different
places.
It is
suggested
that its
area is
not less
than
1000m2
with two
storeys
with
500m2
for each
storey
(25
troughs,
with a
length
of 20m),
a width
of 1.2m
for each
trough
and a
width of
0.8m for
each
corridor,
i.e. the
area of
the
withering
house
being
25×(1.2+0.8)×20m2.
The
height
of floor
is 4.5m,
with an
area of
the
withering
trough
being
600m2.
The
construction
of
withering
channels
is to be
fixed
after
the site
is
confirmed. |
|
3 |
Water
supply |
The
water
supply
capacity
is 5
tons/h
with
water
quality
reaching
the
standard
for
drinking
water. |
|
4 |
Electricity
supply |
The
transformer
capacity
is
larger
than
250kVA,
with
4-wire
three-phase
output
terminal,
380V
voltage
and 50Hz
frequency.
A
distribution
room is
specially
arranged
with
more
than 3
output
circuits. |
|
5 |
Machine
repair
shop |
A
special
machine
repair
shop is
arranged
with an
area of
more
than 20m2
and a
storey
height
of 3m.
It is
required
to
provide
for the
shop a
Type
CY6140
lathe, a
small
bench
drill, a
polishing
machine,
a
cutter,
a
welding
machine,
oxyacetylene
and
other
tools.The
toothed
roll is
installed
in the
machine
repair
shop. |
|
6 |
Physio-chemical
analysis
room |
A
special
laboratory
is set
with an
area of
20m2
a storey
height
of 3m,
and
equipped
with
related
measuring
instruments. |
|
7 |
Settlement
room for
drying
machine |
It is to
be fixed
after
the site
is
surveyed. |
|
8 |
Warehouse
for
finished
products |
It is to
be
confirmed
by the
client
according
to
actual
need,
but its
area
should
not be
less
than
300m2. |
Plane Layout of Production
Building
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