JP2001179089A - Moisture adsorbent contained in fuel oil and method for removing moisture contained in fuel oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moisture adsorbent which has an action to efficiently extract the moisture present in a fuel contained in a fuel tank to the outside from a fuel system and a method for removing the moisture contained in the fuel. SOLUTION: This moisture adsorbent is composed of a specific substance which is water-adsorptive and shows non-affinity to the fuel. The characteristics of this method for removing moisture contained in the fuel oil are that the moisture adsorbent is brought into contact with the fuel oil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adsorbent for water contained in fuel oil and a method for removing water contained in fuel oil, and more particularly to a method for efficiently removing water present in fuel oil in a fuel tank. Adsorbent for moisture contained in fuel oil, which has the effect of taking it out of the fuel system, and the performance of the adsorbent for moisture is exhibited efficiently and safely, and can be processed with a simple operation and in a short time. And a method for removing moisture contained in fuel oil that does not adversely affect the fuel oil.

[0002]

2. Description of the Related Art Various petroleum fuel oils are used as fuel for internal combustion engines such as aircraft, ships, automobiles, and generators, and for domestic or industrial equipment such as boilers and stoves. Of these, automotive fuel oil is roughly divided into gasoline and light oil, turbine fuel oil for aircraft, gasoline, light oil or heavy oil for ships, light oil or heavy oil for agricultural equipment, and light oil or heavy oil for generators. However, kerosene or heavy oil is mainly used for household or industrial stoves.

[0003] These liquid fuel oils are essentially water-insoluble and have little compatibility with water. Therefore, if water mixes into the fuel oil in the fuel tank for some reason, the water mixed in the fuel oil separates from the fuel oil with the passage of time, and sinks to the bottom of the fuel tank due to a difference in specific gravity. Moisture in the fuel oil in the fuel tank exists mainly for the following reasons. 1) Moisture contained in fuel oil from the beginning. 2) Moisture in the air due to the wave phenomenon of fuel oil in the fuel tank. 3) Mixing due to increase of air layer due to consumption of fuel oil. 4) Mixing due to respiration of the fuel tank due to an increase or decrease in volume due to a change in temperature of the fuel oil.

[0004] Of the fuel tanks, the structure of an automobile fuel tank has a robust hermetic structure for fire prevention and accident prevention, and generally does not include a drain cock or the like. Therefore, in this case, the water once settled in the fuel tank cannot be taken out except when the water separator is operated.

[0005] When water settles in the fuel tank, it causes the following troubles. 1) Poor starting and poor combustion caused by moisture 2) Engine stall due to freezing of water in the fuel pipe in winter 3) Damage and malfunction of fuel pump 4) Corrosion of fuel system parts 5) Formation of emulsions and gums 6) Decay and deterioration of fuel oil For this reason, many fuel drainage agents are commercially available for the purpose of removing water in a fuel tank. Most of these drainage agents are composed of lower alcohols, and glycols, glycol ethers, surfactants,
Rust inhibitors and the like are added as necessary.

[0006] The function of the drainage agent is to improve the affinity between the water contained in the fuel oil and the fuel oil by interposing the drainage agent, thereby dispersing and emulsifying the water in the fuel oil. The principle is that they are solubilized and burned together. Of these, the state in which water is dispersed and emulsified actually has a lack of affinity between water and fuel oil, and water tends to separate from fuel oil over time. This is a method of solubilizing.

[0007] Depending on the amount of sedimented water, the amount of the draining agent for completely solubilizing the water is several times the amount required for forming an emulsified state. In this sense, the amount of the commonly used drainage agent is insufficient for complete water solubilization.

Further, even if the water is completely solubilized, the water present as moisture in the air is mixed into the fuel oil during traveling, and the water in the fuel oil increases gradually. Therefore, the solubilization of water tends to be incomplete over time. As a result, the water separates again and settles at the bottom of the fuel tank.

[0009] In the case of light oil, the oiliness is higher than that of gasoline. Therefore, the amount of the water removing agent for solubilization requires a larger amount than that of gasoline. Further, since many fuel tanks for light oil are larger than tanks for gasoline, taking into account the capacity of the tank, several times the amount of drainage agent is required. Therefore, in order to add the theoretical necessary amount of the water drainage agent for light oil to completely solubilize the water, the amount of the water drainage agent far exceeds the common sense range from the price of the currently marketed water drainage agent, It will probably be as much as or more than the amount of fuel oil purchased.

In addition, since the conventional water draining agent is a method in which the water draining agent itself is added to the fuel oil, even if the water is completely solubilized, the absolute amount of the water in the fuel tank is not affected. There is no change, and the moisture and the added drainage agent remain inside the fuel system unless burned. Therefore, in addition to the adverse effects of moisture, various problems caused by the components of the drainage agent (effects on rubber, gaskets, adhesives, and other non-metallic materials, changes in flammability, generation of gum-like substances, composition of exhaust gas Change, decrease in lubricity, decrease in exhaust catalyst performance, etc.)
Occurs. In addition, since the action mechanism removes moisture by burning the combustion of the fuel oil, there is a disadvantage that it takes a long time to remove the moisture in the fuel oil.

Further, the effect of the draining agent which has been blended with a lower alcohol as a main component is not constant depending on the type of fuel oil, water content, and volume of the fuel oil. However, there are many fuel oils which have practically no effect on heavy oil. Further, as a result of giving an interfacial effect such as dispersion, emulsification, and solubilization to water contained in the fuel oil, a cream layer may be formed or gelled, which is not preferable.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the conventional drainage agent. That is, an object of the present invention is to provide a moisture adsorbent having a function of efficiently removing water present in fuel oil in a fuel tank to the outside from a fuel system and a method of removing water contained in fuel oil. I do.

[0013]

Means for Solving the Problems To achieve the above object, the present invention comprises a cellulose and a derivative thereof, an acrylic acid and a derivative thereof, a methacrylic acid and a derivative thereof, a methacrylic acid and a derivative thereof, polyethylene oxide and A derivative thereof, alginic acid and its derivative, guar gum and its derivative, maleic anhydride butadiene derivative, pectin, xanthan gum, and at least one selected from carrageenan gum,
An adsorbent for moisture contained in fuel oil; in a preferred embodiment of the present invention, the adsorbent has a longest diameter of at least 1 m;
m. A fuel according to another aspect of the present invention, wherein a fuel oil taken out of a fuel tank is brought into contact with the adsorbent for moisture contained in the fuel oil according to claim 1 or 2. This is a method for removing water contained in oil.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an adsorbent for water contained in fuel oil according to the present invention will be described.

The adsorbent for water contained in fuel oil of the present invention (hereinafter referred to as a water adsorbent) has an adsorbing property for water and has no affinity for fuel oil.

In the present invention, "fuel oil" refers to oily fuels such as petroleum fuels such as gasoline, light oil, heavy oil, kerosene, and turbine fuel.

[0017] The phrase "having water-adsorbing property" specifically means that light oil 50 is added to a 100 ml screw bottle.
ml and 1 g of a water adsorbent, 4 ml of water is added, and in a water absorption test in which the mixture is shaken well and allowed to stand for 10 minutes, substantially all of the water is adsorbed to the water adsorbent.
Then, about 10 g of the moisture adsorbent is placed in a petri dish, stirred with a spatula, left indoors at room temperature with a lid open, stirred once a day, and left in the same manner.
The water absorption test is performed after repeating the above, and it means that substantially all of the water is adsorbed on the moisture adsorbent.

"Incompatible with fuel oil" means:
Specifically, 50 ml of fuel oil is placed in a 100 ml screw bottle.
ml and 1 g of the water adsorbent, stir well and seal.
It is left standing in a cool and dark place, stirred once a day, left standing similarly, and after repeating this operation seven times, it means that the fuel oil and the moisture adsorbent have not substantially changed.

The water adsorbent in the present invention needs to have the ability to adsorb and fix the water in the fuel oil, and must have an affinity for water.

However, anhydrous sodium sulfate, calcium oxide, silica gel and the like, which have a strong affinity for water, react with water existing as moisture in the air before being used as a moisture adsorbent, and the reactant is water. Since the ability to adsorb is lost, it cannot be practically used for the purpose of the present invention. That is, the moisture adsorbent suitable for the present invention is desirably a substance which is allowed to stand indoors for about 24 hours in the air, and has a water adsorbing power even after natural moisture absorption.

Further, as for the moisture adsorbent of the present invention, it is necessary to consider the shape change in the state of adsorbing moisture.
For example, a powdery polymer compound called a superabsorbent resin has a strong affinity for water, but absorbs water to increase in volume, and further becomes jelly-like, causing a change in shape. Therefore, there is a risk that the inside of the cartridge storing the moisture adsorbent may be closed. For this reason, the superabsorbent resin cannot be used in the form of powder in the present invention. However, if the surface area of the superabsorbent resin is reduced by performing an operation such as molding, a good effect will be exhibited. Even in this case, if the particle diameter of the moisture adsorbent is smaller than 1 mm, deformation occurs at the time of adsorbing moisture, which is not preferable.

Furthermore, it is an essential condition that the moisture adsorbent suitable for the present invention has no affinity for fuel oil. If the water adsorbent has an affinity for fuel oil, the shape of the water adsorbent changes, which may block the cartridge, and the water adsorbent dissolves in the fuel oil, deteriorating the quality of the fuel oil. May be caused.

Substances satisfying the above conditions for the water adsorbent of the present invention include cellulose having water affinity and its derivatives, acrylic (methacrylic) acid and its derivatives, polyethylene oxide and its derivatives, alginic acid and its derivatives Guar gum and its derivatives, maleic acid and its derivatives, pectin, xanthan gum, and carrageenan gum.

Examples of the derivatives of cellulose having an affinity for water include methyl cellulose, carboxymethyl cellulose, carboxyethyl methyl cellulose, hydrophobized modified methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxyalkylethyl cellulose, alkylhydroxyalkylethyl cellulose, hydrophobized modified hydroxyethyl cellulose, Hydroxypropylcellulose, hydroxyalkylpropylcellulose, alkylhydroxyalkylpropylcellulose and the like can be mentioned, and the acrylic (methacrylic) acid derivative is a copolymer of acrylic acid or methacrylic acid, acrylic acid or methacrylic acid. Copolymer of starch and starch, copolymerization of acrylic acid or methacrylic acid and polyvinyl alcohol Products, copolymers of acrylic acid or methacrylic acid and polyethylene oxide, and the like. Examples of the polyethylene oxide derivatives include cross-linked polyethylene oxide, polyethylene oxide starch copolymers, and the like. Examples of alginic acid derivatives include sodium alginate and propylene glycol alginate.Examples of the guar gum include hydroxypropylated guar gum.Examples of the maleic acid derivative include maleic anhydride butadiene. Copolymers and the like can be mentioned.

In the moisture adsorbent of the present invention, each of the above substances may be used alone, or a plurality of substances selected from the above substances may be mixed and used. In addition,
The mixing ratio when a plurality of substances selected from the above substances are mixed and used can be appropriately set according to the purpose.

The moisture adsorbent of the present invention may contain a physical property improver, a material for molding and the like within a range not to impair the object of the present invention. For example, when lubricity during molding becomes a problem, an inorganic lubricant such as talc may be used in combination.

The water adsorbent of the present invention is formed into a fixed product by an operation such as pressure press molding or extrusion molding in order to reduce the surface area of the water adsorbent. More favorable results are obtained.

[0028] The moisture adsorbent of the present invention includes spheres, cylinders, cylinders,
It has a regular shape such as a cone, a prism, a pyramid, a trapezoid, a go-stone, an abacus ball, and a donut shape, and preferably has a longest diameter of at least 1 mm.

Next, a method of removing water contained in fuel oil according to the present invention will be described.

The method for removing water contained in fuel oil (hereinafter referred to as "water removal method") of the present invention is a method for separating fuel by bringing the above-mentioned moisture adsorbent into contact with fuel oil taken out of a fuel tank. It is.

The contact method between the moisture adsorbent and the fuel oil is such that the moisture contained in the fuel oil is efficiently transferred into the moisture adsorbent by contact between the moisture adsorbent and the fuel oil taken out of the fuel tank. There is no particular limitation as long as it is a method that can be used. For example, (1) a method in which a moisture adsorbent is brought into direct contact with fuel oil taken out of a fuel tank, and (2) a tubular storage device provided with a filter material on the outside. A method in which a water adsorbent is filled and the fuel oil taken out of the fuel tank is transferred from the outside to the inside of the storage device to make them come into contact with each other; (3) moisture adsorption to a bag-shaped storage device having a filter function A method in which the agent is put into the storage device and the fuel oil taken out of the fuel tank is transferred from the outside to the inside of the storage device so that the two are brought into contact with each other.

When phase separation occurs between fuel oil and water in the fuel tank, the fuel oil is sucked from the fuel tank, and then (1) a method in which the water adsorbent is brought into direct contact with the fuel oil. (2) A method in which a tubular storage device having a filter material on the outside is filled with a moisture adsorbent, and the fuel oil is transferred from the outside to the inside of the storage device so that they are brought into contact with each other; (3) A method in which a moisture adsorbent is put in a bag-like storage device having a filter function, and fuel oil is transferred from the outside to the inside of the storage device so that they are brought into contact with each other can be mentioned.

As a continuous method for removing water, for example, a liquid feed system for connecting a fuel tank and a cartridge containing a moisture adsorbent therein is created, and fuel oil is sent to the cartridge using a pump. And a method of continuously contacting the fuel oil with the moisture adsorbent.
In this case, since the cartridge simultaneously functions as a filter, the separation of the fuel oil and the moisture adsorbent is also performed continuously. Further, the moisture adsorbent detached from the cartridge can completely separate the fuel oil and the moisture adsorbent by providing a filter on the downstream side of the cartridge.

FIG. 1 shows a fuel oil moisture removing system of the continuous type, which is one specific example of an apparatus for carrying out the moisture removing method of the present invention. Hereinafter, components of the water removal system will be described.

(A) Inlet hose The inlet hose is a hose that is inserted into a fuel tank and sucks fuel oil. It is preferable to use a flexible one having a function of efficiently sucking water settling at the bottom of the fuel tank. Further, in order to prevent the fuel oil from being contaminated in the fuel tank due to the backflow of the fuel oil, it is preferable to install a check valve in the inlet hose.

(B) Pump The pump is a power source for sucking fuel oil and water mixed therein from the fuel tank and discharging the fuel oil to the fuel tank again through the cartridge.
Further, a material which is less likely to generate static electricity is suitable. For example, an air pump or the like is preferable. The suction and discharge capacities of the pump are preferably such that the work can be carried out with extra capacity in consideration of the work time and the like. However, it is necessary to select the pump while paying attention to the piping system and the internal pressure of the water removal system.

(C) Pre-filter The pre-filter is a part for removing dust, rust, slag, scum and the like in the fuel oil. Installed to prevent clogging of cartridge, primary filter and secondary filter.

(D) Mixer The mixer is a part that plays a role of dispersing and miniaturizing the water contained in the fuel oil to facilitate the contact between the water in the fuel oil and the moisture adsorbent. The use of a movable mixer increases the possibility of generating static electricity, which is dangerous. Therefore, a fixed mixer is preferable.

(E) Cartridge The cartridge is filled with a moisture adsorbent and supplements the moisture in the fuel oil. It is preferable that the material of the cartridge body has no affinity with the fuel oil and has a strength that does not cause a problem during use. For example,
Various metals such as iron and brass, polyethylene resin, polypropylene resin, vinyl chloride resin and the like are preferable, but in view of incineration treatment after use, polyethylene resin and polypropylene resin are particularly preferable.

The cartridge desirably has openings at both ends and side surfaces of a size suitable for the movement of fuel oil. A wire mesh or the like built in a Y-type strainer is a cheap and practical one. No.

The water adsorbent may be put into the cartridge either by putting the water adsorbent in the cartridge as it is or by holding the water adsorbent in the storage container as described in (1) or (2) above. Then, the moisture adsorbent may be put in the cartridge. When the moisture adsorbent is stored in the bag-shaped storage container and placed in the cartridge, the material of the container is preferably a nonwoven fabric having a filter function, and particularly preferably a material that can be sealed by heat sealing. Further, when the moisture adsorbent is stored in a bag-shaped container and put in a cartridge, an appropriate holding device for preventing deformation of the container during use is required.

It is not preferable to repeatedly use the cartridge once used, for example, because the capacity of the moisture adsorbent is reduced, and it is preferable to use the cartridge in a so-called "disposable" form. Therefore, the cartridge is easily attached and detached, and is attached so that fuel leakage does not occur.

(F) Primary Filter The primary filter is used for the purpose of separating the water adsorbent which has absorbed the water in the fuel from the fuel oil. Since the flow of the fuel oil is in a fixed direction, it is preferable that the fuel oil be installed at a position as close to the cartridge as possible. It is desirable to have an easily removable and reusable performance and shape.

(G) Secondary filter The secondary filter is used for the purpose of completely removing the moisture adsorbent that has passed through the primary filter. It is economical to appropriately select and use a filter medium from commercially available cartridge filters in consideration of fuel oil resistance. The filtration diameter is appropriately selected in consideration of the viscosity of the fuel oil.

(H) Return Hose The return hose is a hose for returning the fuel oil to the fuel tank, and may be fixed to the fuel filler or installed, or may be installed integrally with the inlet hose. . In the latter case, it is more preferable that the return hose has a structure in which the side surface of the inlet hose can be slid and the installation position can be adjusted.

(I) Bypass Mechanism The bypass mechanism is provided to protect the pump when the cartridge is closed and the pressure rises, and to prevent a fuel leak accident. A flow furnace for connecting a flow path connecting the pump and the pre-filter to a downstream flow path of the secondary filter, preferably having a pressure gauge and a leak valve.
It also has the function of reducing the internal pressure at the time of cartridge replacement or at the end of work, and returning fuel oil to the fuel tank.

The above-mentioned water removal system always has a grounding mechanism for removing static electricity when the system is operating.

Hereinafter, a specific implementation and operation of the water removal method of the present invention will be described by taking the case where the above-described water removal system is used as an example.

By driving the pump (b),
Fuel oil is sucked from the fuel tank by the inlet hose (a). The sucked-up fuel oil is sent to a mixer (d) after removing dust, rust and the like in the fuel oil by a pre-filter (c), and disperses and refines water contained in the fuel oil. Thereafter, the fuel oil is sent to the cartridge (e) and comes into contact with the moisture adsorbent stored therein. Then, the water in the fuel oil is instantaneously adsorbed by the water adsorbent. As the captured water is taken into the moisture adsorbent,
Only the taken-in portion swells to cause a shape change, peels off from the moisture adsorbent body, and flows out into the fuel oil. The supplemented water does not detach from the water adsorbent at all, even if a slight pressure is applied, and does not redisperse in the fuel oil. Since the new surface of the moisture adsorbent, which has been peeled off with water, is immediately exposed, a change in the ability to adsorb moisture does not occur, and a constant adsorption performance can be maintained at all times.

The portion where the fuel oil and the moisture adsorbent have passed through the cartridge (e) is sent to the primary filter (f), and the portion where the moisture adsorbent has peeled off is removed from the fuel oil. The separated portion of the moisture adsorbent that has passed through f) is completely removed from the fuel oil by the secondary filter (g).

As described above, the dehydration of the fuel oil is completed, and the dehydrated fuel oil is returned to the fuel tank.

[0052]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments. Note that the present invention is not limited to the following embodiments.

(1) Preliminary evaluation test (Examples 1 to 21, Comparative Examples 1 to 3) (A) Compatibility with fuel oil 50 ml of gasoline, kerosene and light oil were weighed one by one into a 100 ml screw bottle. 1 g of the water adsorbent shown in Table 1 was added, stirred well, sealed, and allowed to stand in a cool, dark place. The mixture was stirred once a day and allowed to stand still, and this operation was repeated seven times. After a lapse of 7 days, the state of the fuel oil layer was visually observed and judged by the following evaluation method. The results are shown in Tables 2 and 3.

：: Both the fuel oil layer and the moisture adsorbent have no change, and both are completely separated.

Δ: Intermediate state between ○ and × ×: Fuel oil layer becomes opaque or emulsified layer or impurities are generated, and it is recognized that the state is clearly changed. Alternatively, it is recognized that the shape of the moisture adsorbent changes and the water adsorbent is dissolved.

(B) Adsorption of water in fuel oil 50 ml of light oil was sampled into a 100 ml screw bottle, 1 g of the water adsorbent shown in Table 1 was added thereto, and the mixture was allowed to stand in a cool and dark place. Red 3BN manufactured by Nippon Kayaku Co., Ltd.
Add 4 ml of water colored in, shake well, and let stand.
The state after 10 minutes was visually observed, and a judgment was made by the following evaluation method. The results are shown in Tables 2 and 3. ：: The state in which the entire amount of water was adsorbed and the fuel oil was completely separated.

：: A state in which most of the water is adsorbed, but a part of the water remains in a water droplet state.

Δ: State intermediate between ○ and × ×: State in which most of the water is present in the form of water droplets.

(C) Moisture adsorbability in fuel oil after moisture absorption About 10 g of the moisture adsorbent shown in Table 1 was placed in a petri dish, stirred with a spatula, and left at room temperature with the lid open at room temperature. The mixture was stirred once a day, left in the same manner, and this operation was repeated seven times, so that the moisture adsorbent absorbed the moisture in the room air. Thereafter, the moisture adsorbing property of the moisture adsorbent after moisture absorption was determined by the evaluation method (b). The results are shown in Tables 2 and 3.

[0060]

[Table 1]

[0061]

[Table 2]

[0062]

[Table 3]

(2) Simulation Test (Example 2)
2) Referring to the results of the preliminary evaluation test, a confirmation test for actually adsorbing water from the fuel tank was performed by the following method using the water removal system shown in FIG.

(A) The water removal system shown in FIG. 1 was assembled using the following components.

A) Inlet hose: Polypropylene hose with a check valve attached at the end b) Pump and accessory parts Air pump: VA50 trochoid pump manufactured by Sanei Seiki Seisakusho Co., Ltd. TOP210 manufactured by Nippon Oil Pump
HB made air filter: SMC made AF3000 type Regulator: SMC made AR3000 type Lubricator: SMC made AL3000 type Hand valve: 400HV-03 type c) Pre-filter: Masuda Seisakusho SQ-06B d) Mixer: Noritake type N-10 e) Water-absorbing agent cartridge: Kitazawa B150 type f) Primary filter: Masuda Seisakusho SQ-06B g) Secondary filter (housing): Self-made Secondary filter (element): R-2510 h) Return hose: Polypropylene i) Moisture adsorbent: Various selections were made from moisture adsorbents that had good preliminary evaluation results, and the blending was repeated. As a result, the following blend was determined, and this was molded into a cylindrical shape having a diameter of 3 mm and a height of 6 mm. Processed and used.

Talcum 5% Hydroxypropylcellulose 50% Acrylic acid derivative 45% (b) Test method A light oil which is relatively difficult to remove water and has high safety during operation was used as a sample. To 20 l of light oil, add 20 ml of water pre-colored with Nippon Kayaku Red 3BN, put it in the fuel tank, short-circuit the piping in front of the adsorbent cartridge of the water removal system, and operate the pump to make the light oil And water were uniformly dispersed. At this time,
Samples were sampled over time, and the water content was measured using a Karl Fischer moisture meter. An IR spectrum was measured with an infrared spectrophotometer of the sampling liquid in which it was confirmed that the light oil and water were uniformly dispersed. Then
A dewatering operation was performed for 10 minutes with the pipes of the water removal system all around, and after completion, the water content and the IR spectrum were measured.

(C) Test results Table 4 shows the water content in the sample before and after the test. In addition, "before the test" in Table 4 indicates a sample when it was confirmed that the light oil and water were uniformly dispersed.

The variation in the amount of water before the test is observed because the amount of water exceeds the saturation solubility, and thus the difference is caused depending on the sampling position and timing. The water content after the test was very small, showing an average of 98.2%, which was very good.

FIGS. 2, 3 and 4 show IR charts of a sample when it was confirmed that new light oil, light oil and water were uniformly dispersed, and a sample after dehydration treatment, respectively. The fog phenomenon near 3400 n ^-1 observed in the IR chart of the sample when it was confirmed that the light oil and water were uniformly dispersed disappeared in the IR chart of the sample after the dehydration treatment. Prove the effect.

[0070]

[Table 4]

[0071]

According to the present invention, the adsorbent for water contained in fuel oil and the method for removing water contained in fuel oil can dewater the fuel oil without being affected by the type of fuel oil at all. It is possible to always exert a certain effect irrespective of the water content and the capacity of the fuel oil.

Further, the adsorbent for moisture contained in fuel oil and the method for removing moisture contained in fuel oil according to the present invention do not change the fuel oil at all, and the absolute amount of moisture contained in the fuel oil is not changed. The amount can be reliably reduced. Therefore,
There is no adverse effect on fuel oil combustion and the like.

Furthermore, the method for removing water contained in fuel oil according to the present invention can be carried out very simply, and does not require any advanced technology.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a system for implementing a method for removing water contained in fuel oil according to the present invention.

FIG. 2 is an IR chart of a new light oil.

FIG. 3 is an IR chart of a sample when it was confirmed that light oil and water were uniformly dispersed.

FIG. 4 is an IR chart of a sample after a dehydration treatment.

[Explanation of symbols]

(A) · · · inlet hose, (b) · · pump,
(C) pre-filter, (d) mixer,
(E) cartridge, (f) primary filter,
(G) ··· secondary filter, (h) ··· return hose, (i) ··· bypass mechanism

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F02M 33/00 F02M 33/00 Z F term (Reference) 4D017 AA05 BA01 CA12 CA13 CB01 DA01 EA05 EB01 4G066 AC01B AC02B AC10B AC12B AC17B AC22B AC37B BA20 CA43 DA09 4H013 AA03

Claims (3)

[Claims] 1. Adsorbent for cellulose and its derivatives, acrylic acid and its derivatives, methacrylic acid and its derivatives, polyethylene oxide and its derivatives, alginic acid and its derivatives, guar gum and its derivatives, butadiene maleate anhydride An adsorbent for water contained in fuel oil, comprising at least one selected from derivatives, pectin, xanthan gum and carrageenan gum. 2. The adsorbent has a longest diameter of at least 1 mm.
The adsorbent for moisture contained in the fuel oil according to claim 1, which is a fixed product having the following formula: 3. The method according to claim 1, wherein the fuel oil taken out of the fuel tank is brought into contact with the adsorbent for water contained in the fuel oil. Removal method.