ACO ClarA 19-38, Руководство по эксплуатации

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8
Operation manual
ACO Clara
3.4 Inlet and outlet pipes
The plant is supplied with firmly fixed built-in inlet (Pos. 1) and outlet
pipes (Pos. 2) DN 200. The inlet pipe is labeled INLET and the outlet
pipe is labeled OUTLET.
3.5 Air-lift pumps
The pumping of raw water, the recirculation of activated sludge, and the
pumping of surplus sludge are performed by air-lift pumps (Pos. 9, 10, 11).
These pumps work on the principle of a vertical pipe immersed in the pum-
ped liquid, where the air is supplied to the bottom part (beyond the liquid inlet). This liquid rises upwards because of the difference in liquid densities
between the air in the pipe and the ambient liquid. The liquid flow through
the air-lift pump changes, depending on the level, with the result that a
decreasing level reduces the flow through the air-lift pump.
3.6 Blower
The supply of the volume of air needed for the micro-bubble aeration of
the activation tank and to drive the air-lift pumps is ensured by a lamel-
la/side channel blower situated outside the main tank; see Chapter 5.2.
The blower is connected to the air system by means of a hose and via
connecting pipe (Pos. 12).
The heated air runs in the hose connecting
the blower and the plant, and so a hose resistant
to an increased air temperature must be used.
The blower requires regular maintenance and service;
this is specified in Chapter 9.
Blower specification
Type Type V / Hz Blower input [kW]
of plant of blower maximum actual
AC 19-38 2 x Secoh EL 250 230/50 0,67 0,43
AC 24-48 2 x Secoh EL 250 230/50 0,67 0,43
AC 30-60 Becker DT 4.25 330-440/50 1,10 0,75
AC 38-76 Becker DT 4.40 330-440/50 1,85 0,96
AC 48-96 Becker SV 8.190/2 330-440/50 2,00 0,75
AC 60-120 Becker SV 5.250/2 370-460/50 2,00 1,30
Air distributor
The air distributor (Pos. 13) serves to distribute the supplied air to indivi-
dual devices. The outlets from the distributor and hoses are fitted with
tags and the name of the unit. The necessary air volume supplied to the
individual parts of the plant is regulated by nozzles (excluding aeration).
The nozzles are adjusted by the manufacturer.
No interference with the nozzle layout is
permitted.
!
Legend:
Return sludge – air-lift pump for return sludge
Aeration elements – aeration elements in activation tank
Surplus sludge – air-lift pump for surplus sludge
Raw sewage water – air-lift pump for raw sewage water
The air is heated in the blower. Take increased
care when handling the hose on the outlet side.