JPH0810683Y2 - Fuel oil supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a fuel oil supply device for an engine using low-quality oil, and in particular, in a main engine diesel engine for a ship, sludge is regenerated after cleaning the fuel oil by an oil purifier. It is possible to supply the fuel from the cleaning section to the fuel supply system (fuel service section) without causing agglomeration.

[Prior Art] One of the engines using low-quality oil is a marine main engine diesel engine. After removing sludge such as C heavy oil,
It supplies it to the engine and burns it.

Therefore, the fuel oil supply device is composed of a fuel oil cleaning system and a fuel supply system, and as shown in FIG. 2, the fuel oil cleaning tank 1 and the oil cleaner 2, as the fuel oil cleaning system A, 3 is provided, the fuel oil is put in the fuel oil clear tank 1 and left for about 12 hours to settle and separate the solid content, and then sent to the oil purifiers 2 and 3 to remove sludge by centrifugal separation, and this is used as fuel. Once stored in the oil common tank 4, the fuel supply system B is supplied from the fuel oil common tank 4 via the fuel supply pump 5 and the pressure adjusting valve 6.
To send to.

In the fuel supply system B, the clean fuel oil is adjusted to a predetermined pressure and viscosity, and the fuel oil is supplied to a fuel injection system C including a fuel injection pump (not shown) provided in each cylinder of the engine 7. Are to be supplied.

[Problems to be Solved by the Invention] In such a fuel oil supply device, in order to enable the engine 7, which is the main engine, to continue operating even if an abnormality occurs in the oil purifiers 2 and 3, the fuel oil regular tank 4 is used. Is 8-12
Has the capacity for hours.

However, even if the fuel oil once cleaned by the oil purifiers 2 and 3 is retained in the fuel oil regular tank 4 for a long time, unstable particles in the fuel oil are re-aggregated to form sludge again. When it is sent to the fuel supply system B, it is in a state of containing sludge.

Therefore, there are problems that the filters in the fuel supply system B and the fuel injection system C are clogged, and the inside of the engine 7 and the turbocharger are contaminated.

Therefore, conventionally, clean fuel oil in the upper part of the fuel oil regular tank 4 is supplied to the fuel supply system B, and excess fuel oil containing a large amount of sludge in the bottom part is returned to the fuel oil clear tank 1 by the overflow pipe 8. However, the above problems cannot be solved completely.

The present invention has been made in view of the problems of the related art, and an object thereof is to provide a fuel oil supply device capable of supplying the fuel oil while preventing the reaggregation of sludge.

[Means for Solving the Problems] In order to solve the problems of the above-described conventional technology, the fuel oil supply device of the present invention uses a fuel oil cleaning system to transfer the fuel oil in a fuel oil clear tank through an oil cleaner. In the fuel oil supply device that cleans and supplies to the fuel supply system of the engine, a supply pipe is provided to directly supply the excess fuel oil purified by the oil purifier to the fuel supply system, and a sluice valve is installed in this supply pipe. While doing
The upstream side of this sluice valve and the emergency tank are connected by a return pipe for returning surplus fuel oil via a pressure regulating valve, and an emergency is provided between the emergency tank and a fuel supply system downstream of the sluice valve. A pipe is provided for communicating clean fuel oil from the emergency tank to the fuel supply system via the fuel supply pump, the pressure adjusting valve and the sluice valve when the oil purifier is abnormal.

[Operation] According to this fuel oil supply device, the oil purifier of the fuel oil cleaning system and the fuel supply system are directly connected to each other by the supply pipe, and the clean fuel oil is directly supplied to the engine. , The sludge is prevented from re-agglomerating, and the filter is prevented from clogging and the inside of the engine is prevented from being contaminated.

Therefore, normally, fuel oil is supplied directly from the oil purifier to the fuel supply system to prevent sludge agglomeration, while excess fuel oil supplied from the oil purifier is supplied to the emergency tank. Since the old fuel oil was made to overflow and return, when the oil purifier is abnormal, the fuel oil should be supplied to the engine from the emergency tank with the same cleanliness as in the case of supplying from the conventional service tank to continue operation. I am able to

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic configuration diagram of an embodiment of the fuel oil supply system of the present invention.

The fuel oil supply device 10 is applied to a marine main engine diesel engine using, for example, C heavy oil as a low-quality oil, and includes a fuel oil cleaning system A and a fuel supply system B. The fuel injection system C and the fuel injection system C may have the same configuration as that described with reference to FIG. 2, and the description thereof will be omitted.

The fuel oil cleaning system A of the fuel oil supply device 10 is provided with a fuel oil clearing tank 11 so that the fuel oil transferred from the tank or the like at the bottom of the vessel is left for about 12 hours to allow solids to settle and separate. Has become.

The fuel oil tank 11 includes pumps 12, 13 and a heater 1.
Two oil purifiers 16 and 17, which are installed side by side, are connected via 4, 15 respectively.

The two oil purifiers 16 and 17 are operated alternately, and the fuel oil in which the solid content is separated is sent to the fuel oil clarification tank 11 to remove sludge in the fuel oil by centrifugal separation.

A supply pipe 19 is connected to the outlet pipe 18 of each of the oil purifiers 16 and 17 so that the fuel oil from which sludge has been removed can be directly supplied to the fuel supply system B and is connected to the fuel supply system B. There is.

Then, the oil purifiers 16 and 17 are alternately operated to continuously centrifuge the fuel oil, and clean fuel oil is continuously supplied from the outlet pipe 18 to the supply pipe 19.

Therefore, with such a supply pipe 19, the oil cleaner 16,17
The fuel oil immediately after sludge is removed by the oil cleaners 16 and 17 can be supplied to the fuel supply system B by connecting the outlet pipe 18 of the fuel supply system B to the fuel supply system B, and the reaggregation of sludge is prevented. In addition, the filters of the fuel supply system B and the fuel injection system C can be prevented from being clogged, and the engine and the turbocharger can be prevented from becoming dirty.

Further, a sluice valve 20 is provided in the supply pipe 19 in order to cope with an abnormality in the two oil purifiers 16 and 17, and the supply pipe 19 upstream of the sluice valve 20 is provided. A return pipe 22 is connected via a pressure control valve 21 to communicate with an emergency tank 23 corresponding to a conventional fuel oil regular tank.

The emergency tank 23 is connected with an emergency pipe 26 via an emergency fuel supply pump (emergency pump) 24 and a pressure adjusting valve 25, and further via a sluice valve 27, a sluice valve 20 of a supply pipe 19 is connected. It is designed to communicate with the downstream side of.

Also. This emergency tank 23 has an overflow pipe
28 is provided to return excess fuel oil to the fuel oil clearing tank 11.

In the fuel oil cleaning system A of the fuel supply device 10 thus configured, the clean fuel oil from which sludge has been removed is supplied to the fuel supply system B as follows.

(1) Two or one oil purifiers 16 and 17 are operating normally.

In this case, in order to directly supply the clean fuel oil from which sludge has been removed by the oil purifiers 16 and 17 to the fuel supply system B, the sluice valve 20 of the supply pipe 19 is opened and the sever of the emergency pipe 26 is separated. The valve 27 is closed. Further, the pressure regulating valve 21 of the return pipe 22 is in an operating state so that the primary pressure is kept constant, the pressure of the fuel oil supplied from the oil purifiers 16 and 17 is kept constant, and the excess fuel oil is Is stored in the emergency tank 23 through the return pipe 22.

The clean fuel oil kept at a predetermined pressure in such a state is directly supplied to the fuel supply system B via the gate valve 20 of the supply pipe 19.
Is supplied to.

Therefore, the fuel oil can be supplied without being left in the fuel oil regular tank for about 8 hours as in the conventional case, and the fuel oil can be supplied in a clean state without causing reaggregation of sludge.

Further, the excess fuel oil cleaned by the oil purifiers 16 and 17 is stored in the emergency tank 23 via the pressure adjusting valve 21 and the return pipe 22, and the overflowing fuel oil is passed through the overflow pipe 28 opening at the bottom of the tank. The old fuel oil is returned to the fuel sump tank 11.

As a result, the fuel oil consumed by the operation of the main engine diesel engine finally appears as a change in the storage amount of the fuel oil clear tank 11.

(2) When the two oil purifiers 16, 17 cannot operate because of an abnormality.

In this case, the fuel oil is supplied from the emergency tank 23 corresponding to the conventional fuel oil regular tank.

Therefore, while closing the sluice valve 20 of the supply pipe 19,
Open the sluice valve 27 of the emergency pipe 26.

The pressure adjusting valve 21 is fully closed because the oil purifiers 16 and 17 are stopped and there is no pressure on the primary side.

In such a state, the fuel oil in the emergency tank 23 is adjusted to a predetermined pressure by the fuel supply pump 24 and the pressure adjusting valve 25, and is supplied to the fuel supply system B via the partition valve 27 of the emergency pipe 26. .

As described above, the fuel oil supplied from the emergency tank 23 is always supplied with clean fuel oil while the oil purifiers 16 and 17 are operating cleanly, and old fuel oil is removed as fuel oil clear. Since the fuel oil is returned to the tank 11, the fuel oil can be supplied in the same state as the cleanliness of the fuel oil from the conventional fuel oil service tank, and there is no problem.

In this way, by using the system of the conventional fuel oil common tank as an emergency, it is possible to easily cope with the abnormality of the two oil cleaners 16 and 17.

According to such a fuel oil supply device 10, the oil purifiers 16, 1
The fuel oil after removing sludge and the like in 7 can be immediately supplied to the fuel supply system B and consumed.

As a result, it is possible to prevent re-aggregation of fine sludge while retaining it in the conventional fuel oil service tank, to reduce clogging of the filter as much as possible, and to greatly clean the engine and turbocharger. The width can be reduced.

Further, if the conventional fuel oil common tank system is used as it is, it is possible to cope with an abnormality of the oil purifiers 16 and 17, which contributes to safe operation of the ship.

Further, when supplying clean fuel oil directly from the oil purifiers 16 and 17 to the fuel supply system B, at least the supply pipe 19 is added to the existing ship, and further the sluice valves 20 and 27 and the pressure adjusting valve 2 are added.
All you have to do is add 1 and you can easily deal with it.

It is needless to say that the present invention is not limited to the above-mentioned embodiment, and each constituent element may be modified within a range not changing the gist.

[Effects of the Invention] As described above in detail with the embodiment, according to the fuel oil supply apparatus of the present invention, the oil cleaner of the fuel oil cleaning system and the fuel supply system are directly connected by the supply pipe. As a result, clean fuel oil can be directly supplied to the engine, whereby reaggregation of sludge can be prevented, and clogging of the filter and dirt inside the engine can be prevented.

Therefore, normally, fuel oil is supplied directly from the oil purifier to the fuel supply system to prevent sludge agglomeration, while excess fuel oil supplied from the oil purifier is supplied to the emergency tank. Since the old fuel oil was made to overflow and return, when the oil purifier is abnormal, the fuel oil should be supplied to the engine from the emergency tank with the same cleanliness as in the case of supplying from the conventional service tank to continue operation. You can

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the fuel oil supply system of the present invention. FIG. 2 is a schematic configuration diagram of an example of a conventional fuel oil supply device. 10: Fuel oil supply device, 11: Fuel oil clear tank, 16, 17: Oil purifier, 19: Supply pipe, 20: Gate valve, 21: Pressure adjusting valve, 22: Return pipe, 23: Emergency tank, 24 : Fuel supply pump (emergency pump), 25: Pressure control valve, 27: Gate valve. A: Fuel oil cleaning system, B: Fuel supply system, C: Fuel injection system.

Claims (1)

[Scope of utility model registration request] 1. A fuel oil supply system for cleaning a fuel oil in a fuel oil clearing tank through an oil cleaner with a fuel oil cleaning system and supplying the fuel oil to a fuel supply system of an engine. A supply pipe for supplying excess fuel oil directly to the fuel supply system is provided, and a sluice valve is installed in this supply pipe, while excess fuel oil is provided between the upstream side of this sluice valve and the emergency tank via a pressure control valve. Of the emergency tank and the fuel supply system on the downstream side of the sluice valve via the emergency fuel supply pump, the pressure control valve and the sluice valve. A fuel oil supply device comprising a pipe for communicating clean fuel oil from a fuel tank to a fuel supply system.