Liquid purification or separation – Processes – Preventing – decreasing – or delaying precipitation,...
Patent
1994-10-13
1996-04-23
McMahon, Timothy M.
Liquid purification or separation
Processes
Preventing, decreasing, or delaying precipitation,...
210696, 422 14, C02F 510
Patent
active
055100384
ABSTRACT:
In drainage systems in buildings and excavations there is waste and ground water with a high dissolved material content. These mainly inorganic substances often cause the build-up of hard deposits in the water conveying parts of the drainage systems, e.g. waste water pipes. These deposits reduce the drainage cross section of the drainage systems thus preventing the water from flowing freely and thus causing back-ups which can result in considerable damage. The current processes of removing these deposits are electro-mechanical cleaning and high-pressure rinsing or abrading with water. These processes are laborious, expensive and cause interruptions in operation. It is the aim of the invention to prevent the formation of such deposits. To this end, a conditioning agent in aqueous form is added via a metering installation at one or more points in the drainage system. The conditioning agent is mixed with the water arriving at the next channel and prevents the dissolved substances from separating out and causing deposits.
REFERENCES:
patent: 3917530 (1975-11-01), Boske
patent: 4741400 (1988-05-01), Underdown
patent: 5057228 (1991-10-01), Breen et al.
Drake James J.
McMahon Timothy M.
Miller Robert A.
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