Pr
o
Minent
®
Page 17
Description and Function
Table 3: Bypass construction
32
flow rate monitor with turbine wheel flow meter
33
flow rate monitor with variable area flow meter
34
back stroke valve (spring loaded, 0.06 bar)
Accessories,
see table 4: or descriptions, see section 1.5 ff.
Table 4: Accessories
50
bypass pump with wall support bracket
51
safety collection tub (without leakage warning) 70 l
60
pre-mixing
not illus.
safety collection tub (with leakage warning) 70 l
not illus.
comparator for chlorine dioxide measurement
not illus.
venting valve for reactor housing
not illus.
Cabinets for systems CDKa 150 and 420 (on request)
not illus.
DULCOFILT
®
G1" filter with 100
µ
m mesh
1.1.3.1
Reactor
The
reactor
is isolated in a closed reactor housing (15) with a
discharge device.
There is a
observation window
(6) in the line above the reactor. The reaction can be observed here in the
form of a slight yellow discoloration.
The chlorine dioxide solution flows through the
metering valve
(7) into the bypass. Here it is
mixed into the bypass water flow.
1.1.3.2
Exhaust system
The
exhaust system
for gases and liquids from the reactor housing consists of an
injector
(injector) (8) and a solenoid valve (a). The injector runs on a water line with a minimal pressure of
1 bar.
The solenoid valve is activated ca. six times an hour by way of the control so that the air in the
reactor housing is regularly renewed. Any possible leakage is thus removed safely as waste
water. Since chlorine dioxide is heavier than air, leakage collects in the lower portion of the
housing and is removed by the exhaust system.
Fresh air is fed into the reactor housing either via a
venting valve
or via a line leading in outdoor
air. The venting valve is available as an accessory (see ch. 1.5.5).
The tank for acid is also ventilated by way of the reactor housing. Corrosive acid fumes are thus
removed by the exhaust system.
1.1.3.3
Metering Pumps
The
metering pumps
for the chemicals acid (1a), water (1b) and chlorite (1c, see fig. 1) are
mounted at the bottom end of the support bracket. A hose leads from the intake lances to the
liquid end of the pumps. A rotary knob on the metering pumps can be used to adjust the stroke
length.
The stroke frequency is calculated by the control and sent by way of pulses to the pumps.
Each pump operates at its own independent stroke frequency. The respective delivery rate is
determined by gauging (calibration, see ch. 2.2.3). These rates are entered into the control. The
control then calculates the necessary frequency so that both chemical pumps deliver the same
quantity.
The water pump delivers 5.5 times as much as the chemical pumps.
The stroke lengths of the pumps must agree within a tolerance of
±
20 %. The liquid ends are
made of acrylic glass. Various pumps are used depending on the capacity of the chlorine dioxide
system (see Table 6, ch. 1.2.2).
From the liquid end of the pumps
PTFE-hoses
lead to the
three-way valves
(2a–c). These can
be set in the positions “bleed” or “feed”. Next in line are the
flow monitors
(3a–c) and then the
reactor
(5). At the entrance to the reactor are three vertically arranged
ball valves
(4a–c).
Summary of Contents for Bello Zon CDKa 10000
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