Three-Chamber tank (D6)
The tank has three chambers. In the mixing chamber (D7), the
polymer is mixed with water. In the maturing chamber (D8), the
polymer solution matures. In the storage chamber (D9), the polymer
solution is stored before withdrawal. The partition between the
chambers prevents the amalgamation of the different solution
phases, enables a constant withdrawal and guarantees the
homogeneity of the solution. In the storage chamber (D9), the
ultrasonic level sensor (D5) is installed to control start and stop of
the preparation process. The overflow outlet (D11) must be
connected to a suitable drain. Through the lockable inspection
holes (D10) the user can check the level and status in each
chamber. The ball valves (E1, E2, E3) are used to drain the
chambers via the drain connection (G). The ball valve (E4) is used
to shut off the withdrawal connection (E), where the prepared
solution is withdrawn from the storage chamber.
Stirrers (D2, D3, D4)
The system is equipped with the stirrers (D2, D3) in the mixing and
maturing chamber as a standard. Optionally the third stirrer (D4) in
the storage chamber can be ordered. The stirrers mix the prepared
solution and enhance the maturing process.
Ultrasonic level sensor (D5)
The contactless and maintenance-free ultrasonic level sensor
measures the solution level in storage chamber (D9) continuously
to set the minimum and maximum thresholds for starting and
stopping the automatic preparation process.
The set limit values start and stop the preparation process
automatically.
A limit value for dry run protects the dosing devices from dry-
running.
A limit value for overflow prevents overfilling.
Dry-material feeder with storage hopper (B4)
The dry-material feeder can be operated with constant or varying
quantities of dry polymer. It is equipped with a 33 l hopper with
dosing screw for constant discharge, and a heating to avoid
humidity lumps in the hopper.
The level sensor (B2) monitors the level of dry material in
the storage hopper. The vibrator (B5) helps to prevent the dry
material from bridging in the dry-material feeder.
Water inlet (A)
The water inlet is equipped with shut-off valve (A1), pressure
reducing valve (A2), electric solenoid valve (A3) and flowmeter (A4)
to supply the system with preparation water. The pressure reducing
valve (A2) is equipped with a pressure gauge and a dirt trap. The
solenoid valve (A3) automatically opens and closes the water inlet.
The regulation valves (A5, A6) are used to adjust the water flow into
the mixing chamber and the jet mixer.
Dissolving hopper with jet mixer (D1)
The jet mixer in the dissolving hopper is specially designed to
produce a depression during operation (injector effect). This
optimises the suction of the dry polymer, prevents the obstruction of
the jet mixer, and guarantees the best wetting of the polymer.
Control cabinet (C1)
The control cabinet includes:
•
7-inch true-colour touchscreen (C2) with Siemens PLC and
multilingual operating software
•
Main switch (C3) which serves as an emergency stop at the
same time
Liquid-concentrate inlet (F)
The system can be ordered with additional components for
preparation from liquid polymer concentrate as an option. In this
case the liquid polymer source is connected to inlet (F) which can
be shut off with ball valve (F1). The liquid-concentrate pump (F2)
doses the liquid polymer into the mixing chamber. The 3-way ball
valve (F3) is used for calibration via calibration outlet (F6). The flow
sensor (F4) monitors the liquid-concentrate flow into the mixing
chamber. The non-return valve (F5) helps to ensure the dosing
accuracy.
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English (GB)
