SU1237232A1 - Settler for separating emulsions - Google Patents

Description

2. The settling tank according to claim 1, which is the fact that the collection of the light phase is set at a height of 0.6-0.65 of the tank height.

The invention relates to devices for separating liquids with different specific gravities, namely devices for cleaning liquids from solid and liquid suspensions by the action of gravitational forces, and can be used for preliminary dewatering of oil in the oil industry.

The purpose of the invention is to increase the efficiency of the separation of emulsions formed during the extraction of highly viscous oils and emulsions containing mechanical impurities.

Figure 5 shows the sump, General view; figure 2 - section aa in figure 1.

The sump contains a vertical cylindrical tank 1, a distributor 2 of the flow of the incoming emulsion with dispensing scallops 3 installed below the water-oil phase separation level at a height of 0.15-0.30 tank height, a pipeline 4 introducing drainage water with distribution pipes connected to it: 5 installed at a height of 0.4-0.5 of the height of the tank, a collection of 6 light phases {installed at a height of 0.6-0.65 of the height of the tank, collection 7 of the separated heavy phase, mounted at a height of 0, 06-0,1 heights of capacity, and pipes - pr-ov 8 input heat carrier bodies with distribution pipes 9.

The sump works as follows.

Water-oil on the emulsion enters the tank 1 through the distributor 2 of the flow and with the help of dispensing scallops 3, installed at a height of 0 ,, 15–0.30 the height of the tank, is distributed throughout the volume of tank 1. Under the force of gravity, water droplets move down and accumulate at the bottom of the tank. The volume of water released in the tank 1 is maintained no more than 0.25– 0.32 of the tank height. For the water season

6-

1237232

3. The sump of claim I, characterized in that the collector of the heavy phase is set at a height of 0.06-0.1 of the tank height.

from tank 1, a collection 7 is provided, installed at a height of 0.06-0.1 of the tank height. At installation of the collector 7, neither 0.06 of the tank height, together with the purified water, dirt, paraffin deposits, and resins are removed, which is undesirable, since this water is then used for injection into the formation. When installing the collection above 0.1 V10

the cells of the tank along with the purified water from the tank removes oil from the water-intermediate interface, which leads to losses of produced oil,

While the water droplets move downward, the oil droplets pop up, forming a layer of oil in the tank, while the upper boundary of the oil should not exceed the .0.72-0.75 tank height.

In this connection, the light phase collector 6 is set at a height of 0.6-0.65 of the tank height. It is undesirable to install above or below the specified limits, since this can lead to an uneven operation of the oil treatment installation (srgoy in the supply is possible), and an increase in the water content of the oil entering the installation.

To increase the efficiency of emulsion destruction, especially emulsions formed during the extraction of high-viscous oils and emulsions stabilized with mechanical impurities, a pipeline 4 is designed through which drainage is discharged to tank 1 through the distribution pipes 5, which separate from the sumps of oil dehydration and desalting stages (containing demulsifiers that

reused and having a temperature of 48-52 ° C). The coolant is also used as the coolant oil from the commercial tanks of the oil treatment plant, which is

1-1, the temperature is 36-40 C. For this is provided a pipeline 8, distribution pipes 9 of which are also

3

placed at a height of 0.4-0.5. height of the sump. The installation height of the distribution pipes (0, A-0.5 sump height) of the coolant inlet pipelines is associated with the possibility of exposing the introduced drainage water or the drained oil from the product tanks to only the volume of the oil phase in the sump. This leads to an increase in the temperature in the oil layer by 12-18 ° C. As a result, the process of destruction of intractable emulsions is intensified. When installing distribution pipes 5 and 9 below and above the withdrawn limits, the process of separation of intractable emulsions worsens. This is due to the fact that when installing distribution pipes below 0.4 of the tank height, the water layer is mainly heated, but this is not necessary, since after the sump the water is directed to the sewage treatment plant, then for injection into the formation, i.e. . heat is wasted. Cro372324

moreover, water has a greater heat capacity than oil, as a result, all the heat is spent on heating water, not oil. When installing distribution nozzles in 0.5 height of the tank, only the top layer of oil is heated. In addition, with this arrangement, it is possible that the coolant enters the collection of the light phase,

10 which leads to a decrease in the water cut-off rate of the sedimentation tank. When establishing distribution pipes 5 and 9: the pipeline of the input of the heat carrier at a height of 6.4-0.5 times the cell of the tank, due to the increase in temperature of only the oil layer, the process of destruction of the emulsion is intensified. At the same time, losing water, falling down under the influence of gravity, transfers its heat to the underlying - the emulsion layer, i.e. the heat of the introduced drainage water is more efficiently used, and the residual demulsifier is reused in drainage water.

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Editor L. Pchelinska

Compiled by A. Evdokimov Tehred IV, Kadar

Order 3220/7 Circulation 663 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Design, 4.

Proofreader V. Booth ha

Claims (2)

1. A settling tank for separating emulsions, containing a cylindrical tank, a distributor of the incoming emulsion and collectors of separated light and heavy phases, characterized in that, in order to increase the efficiency of separation of the emulsion formed during the extraction of highly viscous oils, and the emulsion containing mechanical impurities, it is equipped with a pipeline coolant inlet with distribution pipes installed at a height of 0.4-0.5 capacity heights. <rie. 1 SU ,,,, 1237232 2. Sump according to π. 1, about l and - 3., The settler according to claim 1, characterized in that the collector is characterized in that the collector of the heavy phase is installed at a height of 0.6 yellow phase installed at a height of 0.060.65 of the tank height. 0.1 tank heights.