JPS5954763A - Preliminary processing device for fuel oil in diesel engine - Google Patents

Abstract

PURPOSE:To improve combustibility of fuel and save consumption of the fuel, by providing a recirculating circuit whereby the fuel oil containing a large amount of impurities in the bottom part of a service tank is introduced to the suction side of a feed pump for a centrifugal separator and recirculated to be processed by using the centrifugal separator. CONSTITUTION:Unpurified fuel oil of low quality in a double bottomed tank 1 is suitably heated in a heater 6 and then fed to a centrifugal separator 7a by using a feed oil pump 5a, to be purified, thereafter fed to a service tank 8a. Then, fuel oil in the service tank 8a is fed to a fuel tank 20 of a Diesel engine 9 through a primary filter 14, flow meter 15, mixing tank 16, booster pump 17, heater 18 and a secondary filter 19. While, a part of the fuel oil in the tank 8a is returned from a recirculating cleaning line 22 to a pipe on the suction side of the feed pump 5a and fed again to the centrifugal separator 7a, being repeatedly subjected to a purifying process.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides pre-treatment and embedding of fuel oil for diesel engines, which simplifies the conventional equipment 1 to 7, and effectively treats low-quality heavy oil, which has recently become difficult to use. , 1. Tasel engine fuel oil with advantages such as losing color of engine combustion (2) 1■
It relates to a processing device.

A typical conventional fuel oil pretreatment comb is shown in FIG. In this device, low-quality fuel oil stored in a fuel oil tank (1) such as a double bottom inside a ship is transferred to a settling tank (3) using a pump (2).
In the process, low-quality fuel oil is appropriately heated using a heating coil (4), and impurities such as moisture and sludge are removed using the difference in specific gravity (
After natural settling and clarification to some extent, the fuel oil is filtered. The oil is passed through the centrifugal separator (forced) through the heater (6) using the fuel oil pump (5), and the impurities in the fuel oil are forcibly separated and removed using centrifugal force, and then transferred to the service tank (
8). The centrifugal pre-equipment (7) is continuously fed with more oil than the diesel engine (9) before consumption, and the overflow pipe (10) is connected to the high # of the service tank (8).
By installing a high-ranking Zakujon (11), it is possible to constantly supply Nisumi oil to the Tasel engine (9). The drain discharge valve (IZ) installed at the bottom of the service tank (8) is opened temporarily to drain the bottom oil containing a large amount of impurities into the drain tank (13). It promotes the supernatant effect.

The fuel oil in the service tank (8) is
11] □, primary strainer (14), flow meter (I
Ql Me ten, one thing, tongue? (I[il,
Booster pump 0η2. Heater .

(18), the secondary strainer (1■, □ is sent to the ``diesel engine''□ fuel injection/pump C20 of (9)), and the pressure at the entrance is adjusted by the pressure regulating valve (21). It will be done. The return oil from the fuel injection pump (a) is returned to the mixing tank (16) through pressure regulation and regulating valve dυ.

The above-mentioned fuel oil pre-treatment equipment has a long track record, and recently, diesel oil refining equipment has been used in various parts of the world.
The quality of the heavy oil used as fuel for ships has deteriorated to such an extent that it is no longer able to perform satisfactorily with this type of heavy oil. In other words, recent low-quality heavy oil (1) residual oil refined by thermal cracking or catalytic cracking in addition to the conventional normal pressure or vacuum distillation method is used as base oil, and the viscosity is 5.00 seconds (redwood It is not uncommon for low-quality heavy oils with a specific gravity of around 0.99 to be supplied.However, these heavy oils are not only high in viscosity and specific gravity, but also have a high Heavy oil produced by catalytic decomposition method has a lot of unknowns...B o, a'!
Conventional pre-treatment equipment, such as large amounts of 0 catalysts such as Lika, can sufficiently remove □ and treble.Therefore, low-quality materials sent to the machine and □ Heavy oil is
It has a negative effect on the fuel injection system and the components around the combustion chamber 9, causing damage and causing a series of engine troubles.

The problems with conventional equipment for handling recent heavy oils, which are low-quality heavy oils and have the above-mentioned characteristics of high viscosity and separability, are:
There is little hope for the clarification effect of a settling tank, which separates impurities by simply utilizing differences in ratio and weight.
. Originally, the ceratrig tank was a low-performance centrifuge,
This is a relic from the past, when high-quality fuel oil was used where impurities easily separated and settled, ships with riveted structures that allowed water to easily seep into fuel oil tanks, and oil transport purges with inadequate hatch covers were used. Modern fuel oil processing methods depend on how effectively high-performance automatic exclusion centrifugal separators can be used, and are extremely dependent on centrifuges.

The present invention has been made in view of the above-mentioned circumstances, and has been developed to eliminate the settling tank, which no longer has a sufficient sedimentation and clarification effect on modern low-quality fuel oils, and to fully utilize the functions of a single centrifugal separator. In order to achieve the desired performance, the fuel oil containing many impurities at the bottom of the service tank is guided to the suction side of the feed pump for the centrifugal separator, and is constantly reprocessed using the centrifugal separator, and then returned to the service tank. This is related to the fuel oil pre-treatment device for diesel engines equipped with a fuel oil pre-treatment device, which simplifies the conventional device, effectively treats low-quality heavy oil that is near depletion, improves engine combustion, etc. It has the following advantages.

Embodiments of the present invention will be described below with reference to the drawings. Second
1 indicates a fuel oil pretreatment device for a marine diesel engine, and those having the same functions as those in FIG. 1 are designated by the same reference numerals. .

The unpurified low quality heavy oil stored in the double bottom tank (1) is sent directly to the centrifugal separator (7α) which is in constant use using the fuel oil feed pump (5α). At this time, the fuel oil is heated by a heater (6) to an optimal temperature for separation, and is purified using an automatic displacement centrifuge (7α).

The throughput in the centrifugal separator (7α) is the same as in conventional equipment, which is greater than the fuel consumption of the diesel engine (9). Strictly speaking, the fuel consumption includes 1 of the impurities lost outside the system during fuel reprocessing, which will be described later. An overflow pipe θ0) is installed at a required height so that an amount larger than the amount added is sent to the service tank (8α) and the oil level in the service tank (8α) can be maintained at a constant high level. In addition, there are two circulation cleaning lines connected from the bottom of the service tank (8α) to the suction side piping of the fuel oil feed pump (5a) that feeds oil to the centrifuge (7a). The bottom oil is sent to the centrifugal separator (7a) through the circulation cleaning line (22+) to enable constant circulation and repeated cleaning.

The amount to be reprocessed by the centrifugal separator (7α) is: ・Scrap, 2 + I ``If Buddha's good, pu..., later generation 11L 1 power 1 ・Teyotsu 4 - difference -'r'' lr Or 'g4 td
Lubricating inside the machine (7a) outside the center 1a to l', exchange i''f
-', J"'7"'Kelly Histank (8α) (
Within a certain period of time (Q Jv reserve p J'! +! f
By increasing the number of li'j rings,
: ? Nagisa Hato decides to get a job. circle((
(4. Adjust the amount (tt, A) by adjusting the adjustment valve A: ++ installed in the middle of the ring line (22). In addition, hang the adjustment valve H). Two His Tank (8
It is also possible to automatically adjust the reprocessing capacity of the centrifugal separator (7a) by installing a creepage controller (not shown) in a). 4-1, Ih The extra-cardiac machine can also be used for reprocessing.

The above-mentioned good fortune (in the present invention, -rebisutank (
8α) and centrifugation minute f4! (7α) between the circulation cleaning line (22) and 1. 1) Since the fuel oil is treated repeatedly, it is possible to create a sticky substance that significantly improves the cleaning effect of the fuel oil1, thus improving combustion in the engine and reducing fuel consumption. Reducing damage to the engine due to burnout defects [
L can be achieved, and it is possible to save on operating costs and 111 maintenance costs between slots.

Dimension A - Settling tank 4 - Waste 1t+,', Possibly omitting the piping system around the 7th ring tank, reducing engine room space, i.e., setting tank 6-U
- About 8-12 hours of engine fuel consumption (because it has the same capacity as the old one, it occupies a considerable space) As a result, it is possible to reduce the weight of the hull by (r(J).

The simplification of the Amata equipment has made the work for pre-treatment simple and simple. In other words, it is necessary to replenish fuel oil to the conventional d-set link tank at regular intervals, and to prevent sedimentation at the bottom of the service tank. Operations such as dropping unclean oil containing substances into a drain tank and sending it to a seven-ring tank can be performed without anxiety, and the number of manpower can be reduced.

The present invention is not limited to or limited to the above-mentioned embodiments, and the present invention may be applied to a land-use tea cell. Deviating from the main point (adding a 4' average woman to the range that does not include 7 and making it 4)
Of course, if an existing ship with a 3゜'+7 sotring tank is installed with the f11゛ treatment ring line of the present invention by modification 1-7, and the seven sotring tanks are left in place, this Since the seven-ring tank can be regarded as part of the fuel oil storage tank or part of the transfer line from the C↓ fuel oil storage tank to the centrifuge, it is included in the present invention. I).

1, i1 in the fuel oil pretreatment device for a tea cell engine of the present invention
(1) Fuel oil containing many impurities at the bottom of the tank is guided to the suction side of the centrifugal frame and feed pump. iU
Since a circulation circuit for constant circulation and reprocessing is provided using one centrifugal unit, fuel oil can be effectively processed. Therefore, the combustion of the engine is improved, reducing fuel consumption, reducing damage to the engine, and reducing ship operating costs and engine maintenance costs.

(11) For the same reason as in the previous section, prepare to receive fuel oil whose quality will become even lower in the future.\'1. +, By obtaining lower quality 7S and using fuel oil for 1 month (3, song), the savings in fuel consumption becomes h1 ability) By disposing of the set link tank by 1 ton,
The equipment is simplified, and therefore equipment costs are reduced, engine room space is reduced, and ship weight is reduced.

(1v) For the same reason as in item (11D), the handling of the device becomes easier and labor savings can be achieved.

[Brief explanation of drawings]

Figure 1 (d) is a system diagram of a conventional fuel oil pretreatment device for a marine diesel engine, and Figure 2 is a system diagram of a fuel oil processing device for a marine diesel engine according to an embodiment of the present invention. In the figure, fl) is a double bottom fuel oil tank, (5a, ) r
J fuel oil feed pump, (7a) is one centrifugal pump, (
8α) Water tank, (9) is Tea cell water control (2
indicates the circulating cleaning line. Ding Zoku Sleeve IE Book ('Spontaneous) 1972
October 21, 2017++t+ Wa 5”i Year Ha-1fiW No. 16455
No. 5 No. 2 Komei name De-R-Cell engine fuel oil tier processing equipment 3 Sleeve II-
Special 1 for those who do; '1 out 1fi, 11 people,! (Detailed explanation of the invention in the specification of Yahagi Building, No. 5-3, Uchigami, Chiyogawa-ku, Tokyo, August 8-September, Kado Okada-cho, Nishiba City, Kyoto Prefecture, Japan) After passing through the 12th strainer in column 12, supplement [ with i2 (through the missing strainer with −1). (2) Also extract J as: 1'IjJki-1 in the 9th line of page 5. (3) In page 5, line 13, :process] is extracted as :processj.

Claims (1)

[Claims] 1), 1g + <Remove impurities in low quality heavy oil stored in a heavy oil tank [7. The fuel oil at the bottom of the tank is introduced into the feed pump for the centrifugal separator (ill) and is constantly reprocessed using the centrifugal tfiff1 machine. Diesel engine characterized by: I, ?] (feed oil pretreatment equipment