JP6104581B2 - Apparatus and method for dehydrating water-containing oil - Google Patents

Description

The present invention relates to a dehydration treatment device and Methods of moisture-containing oil.

  As a dehydration method for removing water from fuel oil and lubricating oil containing water, there are, for example, a precipitation separation method, a heat treatment method, a filter filtration (adsorption) method, a centrifugal separation method, and the like.

The precipitation separation method, the centrifugal separation method, and the like can remove the separated water, but have a problem that the dissolved water dissolved in the oil cannot be removed.
Moreover, since the heat processing method accelerates | stimulates deterioration of oil, there exists a problem that it is not preferable.

  As a filter filtration method capable of removing dissolved water, a method using a hollow fiber membrane unit for removing water contained in crude oil has been proposed (Patent Document 1).

Japanese Patent Laid-Open No. 11-244668

  However, the filter filtration method has a problem that the running cost becomes large when processing oil containing a large amount of water.

  Accordingly, the advent of a dehydration apparatus and method for water-containing oil that can efficiently process dissolved water from oil containing a large amount of water is desired.

In view of the above problems, and an object thereof is to provide a dehydration treatment device and Methods of moisture-containing oils which can efficiently process water from oil containing water.

The first aspect of the present invention to solve the above problems, a dehydrator for introducing a predetermined amount of water containing oil, provided at the top side of the dehydrator, dehydrated calcium chloride aqueous solution or magnesium chloride aqueous solution Spraying means for spraying liquid, dehydrating liquid supply tank for supplying dehydrating liquid to the spraying means, stirring means for stirring the sprayed dehydrating liquid together with water-containing oil, and dehydrating liquid used for dehydration by the dehydrator Dehydrating the moisture-containing oil , wherein the dehydrating liquid is regenerated by removing the water from the dehydrating liquid by ventilating the heating or heating the regenerator. In the processing unit.

According to a second aspect of the present invention, in the first aspect of the invention, there is provided a dehydrating apparatus for water-containing oil, comprising a dehydrating oil tank that stores the dehydrating oil dehydrated by the dehydrator.

A third invention is, after the introduction of the water-containing oil dehydrator, and stirred while spraying the dehydrated solution of calcium chloride aqueous solution or magnesium chloride aqueous solution, migration of moisture in the oil by grade salt析作into dehydrated solution The dehydrated liquid used for dehydration is stored in a regenerator, vented to the regenerator or heated to remove water from the dehydrated liquid. In the method for dehydrating a water-containing oil, the dehydrated liquid is regenerated .

  According to the present invention, a dehydrator containing water-containing oil is stirred while sprayed with a dehydrated solution of calcium chloride solution or magnesium chloride solution, transferred to the dehydrated solution side by salting out action, and from the oil containing moisture. Can be easily dehydrated.

FIG. 1 is a schematic diagram of a water-containing oil dehydration apparatus according to the first embodiment. FIG. 2 is a schematic diagram of a water-containing oil dehydration apparatus according to the second embodiment. FIG. 3 is a schematic diagram of a wind turbine including a dehydration apparatus according to the third embodiment. FIG. 4 is a configuration diagram of the hydraulic drive unit.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

An apparatus and method for dehydrating water-containing oil according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of an apparatus for dehydrating water-containing oil.
Here, in this embodiment, a case where a calcium chloride (CaCl ₂ ) aqueous solution is used as the dehydrating liquid will be described.
As shown in FIG. 1, a water-containing oil dehydration apparatus (hereinafter referred to as “dehydration apparatus”) 10 </ b> A is provided on a dehydrator 12 for introducing a predetermined amount of water-containing oil 11 and on the top side of the dehydrator 12. A nozzle 14 which is a spraying means for spraying a calcium chloride aqueous solution 13 as a dehydrating liquid, a dehydrating liquid supply tank 16 for supplying the calcium chloride aqueous solution 13 to the nozzle 14, and the sprayed calcium chloride aqueous solution 13 as a water-containing oil 11. And stirring means 17 for stirring together.
In FIG. 1, symbol L ₀ is an oil supply line that supplies moisture-containing oil 11, L ₁ is a dehydrated liquid supply line that supplies calcium chloride aqueous solution 13, and L ₂ is an oil discharge supply line that discharges dehydrated oil 19. L ₃ is a discharge line for discharging the water-containing dehydrated liquid 13A, and P ₁ is a liquid feed pump for supplying the dehydrated liquid.

  In the present embodiment, the nozzle 14 is provided on the top side inside the dehydrator 12 main body, and the calcium chloride aqueous solution 13 is sprayed from the upper side to the lower side.

This calcium chloride aqueous solution 13 is supplied from a dehydrating liquid supply tank 16 via a pump P ₁ . Then, the calcium chloride aqueous solution 13 sprayed by the nozzle 14 is introduced into the water-containing oil 11 and stirred by the stirring means 17.

  During stirring by the motor M of the stirring means 17, the calcium chloride aqueous solution 13 injected into the water-containing oil 11 is dispersed in the oil and mixed with the oil. During the stirring and mixing, the water in the oil is brought into the dehydrating liquid 13 side by coming into contact with the water floating in the oil.

  That is, when the calcium chloride aqueous solution is used, the water floating in the water-containing oil 11 in the form of water-in-oil is in contact with the calcium chloride aqueous solution 13 having polarity due to the salting-out effect of calcium chloride. Will be captured. And since the water | moisture content once taken in in the calcium chloride aqueous solution 13 does not return to the oil side by the polar effect | action of water, a water | moisture content removal becomes reliable.

Then, while the calcium chloride (CaCl ₂ ) aqueous solution 13 whose specific gravity is heavier than that of the oil is gradually settled by stirring, moisture in the oil is successively taken in and transferred into the calcium chloride aqueous solution 13, thereby completing the dehydration process. It becomes.

As a dehydrating solution that can be dehydrated by the salting-out effect, for example, magnesium chloride (MgCl ₂ ) can be used in addition to the calcium chloride (CaCl ₂ ) aqueous solution.
Here, the property of calcium chloride (CaCl ₂ ) is 1.3 g / cm ³ in a 30 wt% density solution.
On the other hand, the specific gravity of heavy oil is 0.86, and the specific gravity of lubricating oil is 0.82-0.95.

  The calcium chloride aqueous solution 13 that has taken in moisture stops the stirring of the stirring means 17 and is allowed to stand, so that it separates from the oil layer into two layers and accumulates on the bottom side.

After standing for a predetermined time, the dehydrated oil 19 after the dehydration process is stored in the dehydration oil tank 18 by opening the discharge valve V ₁ . Thereafter, the dehydrated oil 19 is reused in, for example, equipment or a combustor.

Predetermined time standing, calcium chloride aqueous solution 13A moisture is migrated after the dehydration process, by opening the discharge valve V _2, is stored in storage tank (not shown).

In the present invention, in order to exert the salting out effect of the calcium chloride (CaCl ₂ ) aqueous solution, the concentration of the dehydrating solution is, for example, 20 to 60 wt% high concentration aqueous solution.
This is because the moisture removal effect is not effectively exhibited at a low concentration of 20% wt or less.

[Test example]
The following oil was prepared and a dehydration test was performed using a predetermined concentration of calcium chloride (CaCl ₂ ) aqueous solution.
As test samples, 1) turbine oil and 2) engine oil (cylinder oil) were used.

  The analysis method used was a xylol distillation method or a Karl Fischer method.

In the test, the used water-containing turbine oil and engine oil were used as sample oils, and the initial moisture content was measured by xylol distillation method for each moisture concentration.
As a result, the turbine oil had a moisture content of 1 wt%, and the engine oil had a moisture content of 1.5 wt%.

Next, an aqueous calcium chloride (CaCl ₂ ) solution (concentration 20 wt%, 40 wt%, 60 wt%) corresponding to 20% volume of each sample oil was added, and then stirred for 1 hour.
After stirring, the mixture was allowed to stand for 1 hour and separated into an oil layer and an aqueous layer, and then water remaining in the upper oil was measured by the Karl Fischer method.
The results are shown in Table 1.

As shown in Table 1, when a calcium chloride (CaCl ₂ ) aqueous solution having a concentration of 20 wt% was used, the water content of the turbine oil and engine oil was reduced to 0.1 wt%.
Further, when calcium chloride (CaCl ₂ ) aqueous solutions having concentrations of 40 wt% and 60 wt% were used, the water content of the turbine oil and engine oil was reduced to 0.05 wt%.
As described above, according to this test, it was confirmed that the oil containing approximately 1 wt% or more of water was dehydrated to 0.1 wt% or less.

When a calcium chloride (CaCl ₂ ) aqueous solution having a concentration of 15 wt% was used, the water content of the turbine oil and engine oil was 0.3 wt% dehydration, which was not preferable.

When a 30 wt% magnesium chloride (MgCl ₂ ) aqueous solution was used, the water content of the turbine oil and engine oil was 0.05 wt%, and good dehydration treatment was performed.

According to the present invention, the water contained in the oil can be removed with a simple structure by bringing the dehydrating liquid into contact with the salted-out effect. Further, the dehydration can be performed in a cycle manner without the consumption substances associated with the dehydration operation.
In dewatering effect, the relationship using a high concentration of the aqueous solution, the water content in the aqueous solution 300~400ppm about in oil dissolved moisture and to remove water from oil containing about 0.3 Number wt% The water content can be 0.1 wt% or less.

  Therefore, the present invention is applied to rough dehydration (for example, water content of 0.1 wt% or less) for oil that does not need to be highly dehydrated or biodegradable oil that is rapidly deteriorated by temperature treatment.

  As described above, according to the apparatus and method for dehydrating water-containing oil according to the present invention, it is possible to efficiently process dissolved water from oil containing water with simple equipment, for example, processing of fuel oil and lubricating oil. Becomes simple.

A dehydrating apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a schematic diagram of a dehydration apparatus according to the second embodiment. In addition, about the member same as the structural member of the dehydration processing apparatus of Example 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
As shown in FIG. 2, the dehydration apparatus 10B according to the second embodiment includes a regenerator 20 that regenerates the calcium chloride aqueous solution 13A to which the water used for dehydration has been transferred in the dehydration apparatus 10A according to the first embodiment. Provided. The regenerator 20 is supplied from the bottom of the dehydrator 12 by opening the discharge valve V ₂ interposed in the discharge line L ₃ .

Here, after the moisture is removed by ventilating air or the like in the regenerator 20 to obtain a predetermined high concentration calcium chloride aqueous solution 13, the water is returned to the dehydrating liquid supply tank 16 by the return line L ₄ .

  Further, before the ventilation, the moisture evaporation effect may be promoted by, for example, heating the air by a heating unit and ventilating the heated air.

  Further, a heater (not shown) which is a heating means may be provided in the regenerator 20 to heat the main body of the regenerator 20 to promote moisture evaporation.

Then, in the regenerator 20, the water contained by the dehydration process is removed and regenerated to a predetermined high concentration aqueous calcium chloride solution 13, and then the valve V ₂ is opened and returned to the dehydrated liquid supply tank 16 to return to the line L ₄ It is returned and reused by the pump P ₂ interposed.

A wind turbine provided with a dehydration apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a schematic diagram of a wind turbine including a dehydration apparatus according to the third embodiment. FIG. 4 is a configuration diagram of the hydraulic drive unit. In addition, about the member same as the structural member of the dehydration processing apparatus of Example 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
As shown in FIG. 3, the wind turbine generator 100 according to this embodiment includes a rotor head (hub) 102 to which a wind turbine blade 101 is attached, a nacelle 104 that pivotally supports the rotor head 102, and a column ( Tower) 105 and a base 106 for installing the tower 105.

  The rotor head 102 includes a rotor head casting 111 that is connected to the main shaft 110 and rotates, and a rotor head cover 112 that forms a predetermined space on the outer periphery of the rotor head casting 111 and covers the rotor head casting 111. A plurality of wind turbine blades 101 are attached to the rotor head casting 111 radially with respect to the rotation axis direction. The wind turbine blade 101 is lifted by the external wind, and the generated lift becomes power for rotating the rotor head 102 in the circumferential direction with respect to the rotation axis direction.

  Further, inside the rotor head casting 111, for example, hydraulic equipment that performs pitch control of the wind turbine blades 101, control equipment such as a control panel (not shown), and a power source thereof are housed.

  Further, in the nacelle 104, for example, a hydraulic pump 113 coaxial with the rotor head 102, a hydraulic motor 114 that is rotated by hydraulic pressure from the hydraulic pump 113, and a synchronous generator 115 that generates electric power by rotation of the hydraulic motor 114 are provided. The provided hydraulic / power generation mechanism is stored and installed. Then, the rotation of the rotor head 102 applies pressure to the oil of the hydraulic pump 116, and the generator 115 is driven by rotating the hydraulic motor 114 with the pressure, whereby the generator output is obtained from the generator 115. In order to apply the hydraulic pressure, a hydraulic pipe 116 is arranged between the hydraulic pump 113 and the hydraulic motor 114, and the hydraulic pressure is controlled by a control means (not shown) to control the rotational speed of the synchronous generator 115 to be constant. Yes.

  Further, as shown in FIG. 4, the hydraulic drive unit 120 is pressurized by a hydraulic pump 113 that applies pressure to the oil by rotation of the rotor head 102, and a hydraulic pipe 116 that supplies the oil to which the pressure is applied. A hydraulic motor 114 that is rotated by the oil, a synchronous generator 115 that generates power by the rotation of the hydraulic motor 114, a cooling means 121 that cools the return oil from the hydraulic motor 114, an oil tank 122 that replenishes the oil, and an oil tank And a water-containing oil dehydration apparatus 10 for dehydrating the oil oil 123 supplied from 122.

  The wind power generator 100 according to the present embodiment includes the water-containing oil dehydration apparatus 10 according to the first or second embodiment, so that the hydraulic drive unit 120 can be used when operating the wind turbine for a long period of time. The oil 123 can be dehydrated.

  In addition, since calcium chloride solution or magnesium chloride solution dehydrated liquid is used for dehydration treatment, when sea salt due to salt damage, which is an external cause of the windmill, is mixed in hydraulic oil, it is possible to remove the salt content. In addition, there is a salt removal effect and a synergistic effect is exhibited.

10A, 10B Water-containing oil dehydration equipment (dehydration equipment)
DESCRIPTION OF SYMBOLS 11 Water-containing oil 12 Dehydrator 13 Calcium chloride aqueous solution 14 Nozzle 16 Dehydrating liquid supply tank 17 Stirring means

Claims (3)

A dehydrator for introducing a predetermined amount of water-containing oil;
Provided at the top side of the dehydrator, and the spray means for spraying the dehydrated solution of calcium chloride aqueous solution or magnesium chloride aqueous solution,
A dehydrating liquid supply tank for supplying a dehydrating liquid to the spraying means;
A stirring means for stirring the sprayed dehydrated liquid together with the water-containing oil;
A regenerator for regenerating the dehydrated liquid subjected to dehydration in the dehydrator,
An apparatus for dehydrating water-containing oil , wherein the dehydrating liquid is regenerated by removing water from the dehydrating liquid by ventilating the regenerator or heating the regenerator . Oite to claim 1,
A dehydrating apparatus for water-containing oil, comprising a dehydrating oil tank for storing dehydrated oil dehydrated by the dehydrator. After introducing water content oil dehydrator, and stirred while spraying the dehydrated solution of calcium chloride aqueous solution or magnesium chloride aqueous solution, it moves the water in the oil by grade salt析作into dehydrated solution, and then allowed to stand While obtaining dehydrated oil ,
Moisture characterized by storing the dehydrated liquid subjected to dehydration in a regenerator, venting the regenerator or heating the regenerator to remove water from the dehydrated liquid, and regenerating the dehydrated liquid A method for dehydrating the oil contained.

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