JPS598986Y2 - Crude oil desalination equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crude oil desalination apparatus, and more particularly to an apparatus capable of efficiently removing salts contained in crude oil.

Conventionally, in order to remove salts contained in crude oil, crude oil is introduced into a desalination equipment, water is added to it, and the two are brought into contact to transfer the salts to water, and then a high voltage is applied to remove salts from the crude oil. Salts are removed by condensing water to form microscopic water droplets, and then allowing these microscopic water droplets to settle to the bottom and be separated.

However, in this case, there are problems in that it takes time for the minute water droplets to settle to the bottom of the device, and it is difficult to completely separate the water from the crude oil.

Therefore, the inventor of the present invention has conducted extensive research in order to overcome the drawbacks of the above-mentioned conventional techniques and to develop an apparatus that can quickly and completely separate water containing salts from crude oil.

As a result, the inventors found that it is effective to provide an inclined plate at a lower position of the desalination tank in order to promote the sedimentation speed of microscopic water droplets and their separation, and have completed the present invention.

To explain the present invention based on the drawings, the present invention includes at least one pair of electrodes 2 and 2' provided in the desalination tank 1, and one or more inclined plates 3 disposed below the electrodes. The present invention provides a desalination device comprising:

According to the present invention, the crude oil (containing salts) to be treated is firstly processed.

) and water are introduced into the desalination tank 1 from the supply port 4.

When crude oil and water come into contact here, salts in the crude oil are transferred to water.

Then, under the influence of a high-voltage electric field formed between at least one pair of electrodes 2, 2', the water in the crude oil condenses and grows into minute water droplets.

These minute water droplets gradually settle toward the bottom of the desalination tank 1, but the sedimentation speed is very slow, so the separation efficiency is not sufficient as it is.

Therefore, in the present invention, one or more inclined plates 3 are disposed below the electrodes 2, 2'.

When the settling minute water droplets collide with the upper part of the inclined plate 3, the water droplets are easily separated from the crude oil there, or the water droplets combine with each other to form larger water droplets, so that they quickly move along the inclined plate 3. move downwards.

Here, the shape, number, installation angle, installation position, etc. of the inclined plates 3 may be determined as appropriate depending on various conditions and cannot be determined unambiguously, but in short, the settling of minute water droplets can be prevented as much as possible. It is only necessary that the water droplets can absorb a large amount of water and be easily separated from the crude oil, and also be able to move these minute water droplets to the bottom of the desalination tank 1 as quickly as possible and discharge them from the drain port 7.

From this point of view, it is usually preferable not only to increase the number of inclined plates 3 as much as possible, but also to take measures such as making them wave-shaped so as to increase the surface area.

Further, the installation position of the inclined plate 3 may be a position below the electrodes 2, 2', but it is not efficient in a position where it takes a long time for the shaped minute water droplets to collide with the inclined plate 3.
It is preferable to position it immediately below or slightly below the electrodes 2, 2', and it is not preferable to position it too close to the bottom.

Furthermore, the inclination angle of the inclined plate 3 is such that when the settling minute water droplets collide with the inclined plate, they can receive a strong impact to the extent that the water droplets are easily separated from the crude oil, and the colliding water droplets can also be applied to the inclined plate. The angle may be set to such an extent that it can quickly flow down to the bottom along the flow path.

The specific angle of inclination is 30 to 60 with respect to the horizontal plane.
°, preferably 40 to 50'.

Incidentally, the inclined plate 3 may be attached to the demineralization tank 1 by an appropriate means, for example, it can be fixed by a support 6 provided at the bottom of the demineralization tank 1.

As described above, according to the desalination apparatus of the present invention, the crude oil containing salts introduced from the supply port 4 comes into contact with water, and the salts in the crude oil are transferred to water, and then the electrode 2 to which a high voltage is applied ,2
' By passing the water between the crude oil and the oil, the water in the crude oil can be precipitated as minute water droplets, which can be received by the inclined plate 3, flowed down to the bottom, and discharged from the drain port 7.

Therefore, water can be quickly and almost completely separated from crude oil, and since most of the salts contained in crude oil are dissolved in the separated water, the equipment of this invention can be used to remove salts from crude oil. It can be removed almost completely and very efficiently.

Note that crude oil from which salts have been removed can be taken out from the outlet 5 above the desalination tank 1 by taking advantage of its lower specific gravity than water.

Therefore, the desalting device of the present invention can be effectively used as a device for removing salts, which are impurities, from various crude oils.

Desalination equipment of the present invention (10 inclined plates with a length of 120 cnn and a width of 235 cm in a desalination tank with an inner diameter of 4.27 m and a length of 26 m)
11,100 kl of crude oil (Arapian Heavy) was placed on the
7 days and water was introduced at a rate of 410 kl/day, the amount of water discharged from the drain was 390 kl/day,
Separation efficiency was 95%.

On the other hand, when the water was treated in the same way using a desalination equipment without an inclined plate, the amount of water discharged was 360 kl/day.
Separation efficiency was 88%.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the device of the present invention seen from the front, and FIG. 2 is an explanatory diagram of the device of the present invention seen from the side. 1... Desalination tank, 2, 2'... Electrode, 3
... Slanted plate, 4 ... Supply port, 5 ...
...Output port, 6...Support, 7...
drain.

Claims (1)

[Claims for Utility Model Registration] At least one pair of electrodes 2, 2' are provided in the desalination tank 1, and one or more inclined plates 3 are disposed below the electrodes. salt equipment. 2. The device according to claim 1, wherein the inclined plate 3 has a corrugated shape.