JPS5981291A - Fuel tank - Google Patents

Abstract

PURPOSE:To efficiently remove sludge even in case of a small tank, by a method wherein a number of sludge separating plates are located one above another in a manner to be inclined so that fuel oil falls down thereover, and the adjoining sludge separating plates positioned one above another are disposed such that they are partially superposed on each other. CONSTITUTION:A plurality of sludge separating plates 4a are disposed one above another in a tank T such that they are slanted, and the adjoining sludge separating plates 4a, located one above another, are installed so that they are partially superposed on each other. Oil, fed through an oil feed pipe 10, falls down through a passing-through-tank part separably formed by a partition wall 6, and is raised, while being heated by heating coil 1 at the lower part of the tank. The oil is guarded to flow downward along the downward inclination of the sludge separating plates 4a, and during said downward flow, a sludge content is separated. The separated sludge content is collected in a hopper part 7 located at the lower part of a tank T. This enables efficient removal and separation of the sludge content even if the tank has a small capacity.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel tank capable of separating sludge from inferior fuel oil.

A conventional marine diesel plant fuel oil system is configured as shown in FIG. In the same figure, 01
02 is a fuel storage tank, o2 is a fuel transfer pump, 03 is a fuel oil settling tank, 04 is an oil purifier, and 05 is a fuel oil service tank, and these components are connected through piping as shown in the figure. . In addition, 06 in the figure indicates the fuel oil settling tank 03 and the fuel oil service tank o.
5 shows the heating coil installed in the interior. Then, the fuel oil sent to the fuel storage tank 01 or the fuel oil settling tank 06 by the fuel transfer pump 02 is purified by the oil purifier o4, and then supplied to the main engine via the fuel oil service tank o5. ing.

- In the conventional fuel oil system mentioned above, the fuel oil settling tank 03 usually does not have a built-in sludge separation plate or rectifying plate, so not only does it take a long time for the sludge in the fuel oil to settle, but the settling effect is also poor. However, there are two types of tanks 03 and 2 tanks on the downstream side of the fuel transfer pump o2.
The oil purifier 04 had the disadvantage of having to be equipped with the oil purifier 05, making the system complicated, and the oil purifier 04 had the disadvantage of frequently breaking down.

The present invention overcomes the drawbacks and difficulties of the conventional fuel oil system, which has become increasingly inferior in recent years, and can prevent accidents caused by it, and has an excellent fuel oil sludge removal function. It was proposed for the purpose of providing a fuel tank with a large number of sludge separators arranged vertically at an angle so that the fuel oil inside descends. This invention relates to a fuel tank characterized in that a group of sludge separation plates, some of which are arranged so as to overlap each other at appropriate intervals, are disposed within the tank.

The present invention will be specifically explained below with reference to embodiments shown in FIGS. 2 and 6.

In FIG. 2, T is a tank that serves as both a fuel oil settling tank and a service tank, and the bottom of the tank T is formed into a sludge reservoir hole ξ section 7. Reference numeral 1 denotes a heating coil disposed at the bottom of the tank T, 2 a lower suction pipe installed to fluid-tightly penetrate the peripheral wall of the tank T as shown, and 6 a tank above the lower suction pipe 2. A high-level suction pipe is installed fluid-tightly through the peripheral wall of T, and 4 is a sludge separation plate group made up of a plurality of sludge separation plates 4a installed at an appropriate inclination in tank T, as shown in the figure. In the illustrated example, two sets of sludge separation plate groups 4 are provided.

Each separation plate 4α of the sludge separation plate group 4 is connected to the heating coil 1.
The oil in the tank T that is heated and rises is made to flow downward due to its inclination, and as it descends, the sludge is separated by gravity. The separated sludge flows downward on the separation plate 4a, and is finally stored in a part 7 of the sludge storage hopper. Note that the separation plates 4α of the sludge separation plate group 4 are arranged vertically overlapping each other at intervals as shown in the figure.
This is to enable this tank T to function as a service tank in order to secure a certain amount of oil in the event of a failure on the oil supply side. Two or more sets of sludge separating plate groups 4 are installed depending on the purpose, and a heating device is provided between them as necessary. Reference numeral 6 denotes a partition wall disposed along the vertical direction on one side of the tank T, and the upper end of the partition wall B is fixed to the top wall of the tank T.
Moreover, its lower end is located near the sludge sump hopper part 7. The partition wall 6 serves to prevent the stirring action of the return oil and supply oil from the oil return pipe 5 and the oil supply pipe 10 connected to the top wall of the tank T from affecting the oil flow inside the tank T. . 8a is a sludge drain valve attached to the discharge pipe 8 at the lower end of the sludge hopper part 7; 9 is a water detection end attached to the sludge hopper part 7 as shown; It is connected to the sludge drain valve 8α, and controls the sludge drain valve 8α. Reference numeral 11 denotes a level detection end mounted at a suitable position on the side wall near the top of the tank T. The level detection end 11 detects the oil level in the tank T, and uses the detection signal to automatically operate or operate the oil transfer pump. The oil level in the tank T is kept constant.

An embodiment of the fuel tank of the present invention is constructed as described above, and the fuel tank is used by being incorporated into a fuel oil system, as shown in FIG. In the same figure,
12 is a fuel oil storage tank, 16 is a fuel oil transfer pump, 1
4 is the sludge transfer port.

15 is an oil purifier, and 16 is a fuel oil booster pump, and these members are connected via piping as shown.

The level of fuel oil in the fuel tank T of the present invention can be controlled by controlling the oil transfer pump 12 using the rail detection end 11.
Since it is always adjusted to a constant value, normally the high suction pipe 3
Fuel oil that has been sufficiently settled in the tank T can be sucked in through the suction port 6α of the tank T, and can be sent to the main engine (not shown) via the fuel oil booster pump 15.

Note that it is desirable that the suction port 6α be a porous pipe suction port so as not to generate a pipe flow.

On the other hand, if the oil supply system (fuel oil storage tank 1, fuel oil transfer pump 1, piping, etc.) breaks down, the lower suction pipe 2
By switching to suction from the suction port 2a of the tank T, the tank T can be used as a service tank until the oil level in the tank T reaches the position of the suction port 2α of the low suction pipe 2. Furthermore, the sludge and water that have been effectively separated from the fuel oil by the sludge separating plate 4 and rapidly descending are once collected in the sludge reservoir hopper part 7, and when the level thereof is detected by the water detection end 9. In response to the detection signal, the sludge drain valve 8a is automatically opened, and the sludge is transferred to the outside of the system by the sludge transfer pump 4 via the discharge pipe 8.

Since the fuel tank of the present invention has the above-described configuration and function, the present invention has (1) reduced sludge settling time and improved sludge separation function, compared to conventional settling tanks. , the tank capacity can be reduced. Alternatively, if the capacity is the same, performance can be improved.

This will reduce the burden on oil purifiers and may even eliminate them.

(2) Since it has two functions, settling and servicing, the number of tanks can be reduced and the system simplified compared to conventional systems, resulting in reduced installation time, ease of operation, and cost reduction.

The following practical effects can be mentioned.

Next, in another embodiment of the present invention shown in FIG. 4, compared to the above embodiment, the fuel oil storage tank, fuel oil transfer pump, piping, etc. are eliminated, and instead, a side tank 17 is installed as shown in the figure. (
This embodiment is configured to supply fuel oil from the side tank 17 into the tank T.This example has the advantage of saving installation space and reducing costs due to the abolishment of the transfer system. be.

Further, another embodiment of the present invention shown in FIG. 5 shows an example in which the oil purifier is abolished by installing homogenizers 18 as shown in the figure, but in this example, the oil purifier is abolished. This has the advantage of reducing installation space and cost.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram of a conventional fuel system, FIG. 2 is a schematic vertical sectional view of an embodiment of the present invention, and FIG. 3 is an example of the fuel tank of the present invention incorporated into a fuel oil system. 4 and 5 are schematic illustrations of other embodiments of the present invention, respectively. 1: Heating coil, 2: Low suction pipe, 6: High suction pipe, 4: Sludge separation plate group, 4α: Sludge separation plate, 5: Oil return pipe, 6: Partition wall, 7:
Part of sludge storage hopper, 8: Sludge discharge pipe, 8α:
Sludge 8-len valve, 9: Water detection end, 10: Oil supply pipe, 11 Nirail detection end, 12: Fuel oil storage tank, 16: Fuel oil transfer pump, 14: Sludge transfer pump, 15: Fuel booster pump, 16 : Site 9 tank, 17: Homogenizers. (9)

Claims (1)

[Claims] A large number of sludge separation plates are arranged vertically at an angle so that the fuel oil inside descends, and a portion of the upper and lower adjacent sludge separation plates overlap each other with an appropriate distance between them. A fuel tank characterized in that a group of arranged sludge separation plates is disposed within the tank.