US 5,193,594 AGranted

Arrangement for injecting additives

AssigneeNorapp-Jon H. Andresen

InventorsLeif A. Johansson, Tom M. Jacobsen

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Abstract

A method and an apparatus for measured injection of additives into oil products and the like, in particular aims at the filling of fuel in tank farms for transport by tank trucks. Each batch of fuel shall have a pre-set proportion of additive. After each terminated filling and successively at a number larger than one, there is recorded a signal (S6) which represents discrepancies between actually supplied amount of additive and the amount which corresponds to the pre-set proportion. From the first signal (S6) there is calculated a further signal (S7) which represents discrepancies throughout said number of fillings and this further signal serves as a reference or correction value during the subsequent filling operation. A particular supply conduit (10) for fuel is adapted to give a through flow of fuel in order to remove remaining amounts of additive from the measuring system itself. The object is to obtain a substantially improved accuracy in injected proportion of additive in a batch of fuel being loaded or unloaded, and to avoid intermixing of different additives.

Claims7

Dependent claims

Apparatus for measured injection of additives in oil products and the like during successive and separate loading or unloading operations in tank farms, in particular for filling fuel to be transported by tank trucks, comprising:

at least two supply conduits (20B-D) for additives and each provided with a shut-off valve (29B-D), said at least two supply conduits (20B-D) being interconnected (200);
a common control valve (15) connected downstream from said at least two supply conduits (20B-D);
a subsequent common conduit (20) for additives, said subsequent common conduit (20) being connected to said common control valve (15) downstream from said common control valve (15);
a main conduit (10) for oil products and the like, said main conduit being connected downstream of said subsequent common conduit (20);
a connection (43) for connecting the main conduit (10) to the subsequent common conduit (20);
an additional supply conduit (10A) for said oil products and the like, said additional supply conduit (10A) being adapted to be temporarily put into fluid connection with a point of the common conduit (20) oppositely with respect to the connection (43) thereof to the main conduit (10);
and
a control unit (30) which by means of one or more valves (29A, 41) establishes said fluid connection during a time interval which starts substantially simultaneously with or after closing of at least one of said shut-off valves (29B-D) for terminating an injection of additive before fulfilling a loading or unloading operation.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/864,055Filed 6 Apr 1992 · division
Priority: NO 90454422 Oct 1990
Granted: 16 Mar 1993
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

B67D 7/744
Electrically or electro-mechanically operated: involving digital counting
G05D 11/131
Characterised by the use of electric means: by measuring the values related to the quantity of the individual components
B67D 2007/748
For obtaining fuel of a given octane level: by mixing fuel with additives, e.g. anti-knocking agents
B67D
Dispensing, delivering or transferring liquids, not otherwise provided for