RU1837929C - Unit for coalescing of emulsions - Google Patents

Description

In the rotating flow, centrifugal and proppant shear forces appear, which are sufficient to disintegrate the aggregated oil particles and mechanical impurities in the water and group during the next advancement of the separated braid oil particles, mechanical impurities to the periphery of the rotating flow. The location of the partitions in the device gradually and stepwise increasing pitch of the screw helps to reduce the angular velocity of the rotating flow or separation-flow from the upper partition and the appearance of a free surface STI liquid-gas phase, is effective in decoupling coalescence of oil particles on the surface and rastekayuschihs confluent together. Emulsified particles of oil, under the action of gravitational forces, tend to the surface of the stream and, under the action of centrifugal forces, to the axis of the rotating stream.

During the tests, it was noticed that the coalesced emulsion from the partitions does not enter the axial part, but remains on the partitions along which it flows down. Therefore, to concentrate light phase particles in the axial part, and mechanical impurities on the periphery of the rotating flow, spiral partitions with their generators are arranged obliquely to the body generatrix and create conical, truncated cone-shaped spiral partitions resembling dish-shaped partitions. When the conical septum is located with a large base downward, the septa with their generators are directed at an angle upwards and create inclined screw channels. The particles of light liquid (oil) moving under the action of the resulting force towards the axis of rotation together with the bubbles of evolving gas through these inclined channels directly reach the axis of rotation in several turns of liquid rotation. Those particles that do not reach the axis of rotation, but the upper inclined septum, sliding along its lower surface, reach the axis and break from the edges of the septum into the axial part.

In FIG. 1 shows the proposed device with a partition width equal to the radius of the housing, and with a constant pitch of the screw, general view; in FIG. 2-also, a longitudinal section; in FIG. 3 - partitions not reaching the axis of the device located perpendicularly with their generators to the generatrix of the housing and with a variable pitch of the screw; in FIG. 4 - partitions located obliquely with a constant step; in FIG. 5 - partitions with bundles of bundles.

The device consists of a vertical cylindrical body (pipe) 1 with a bottom 2

and a cover 3. A pipe 4 is tangentially arranged for supplying the initial emulsion to the screw channel on top of the device and a pipe 5 for removing the coalesced emulsion from the screw channel on the bottom of the device. Branch 6 of the outlet for light fluid particles separated to the axis is tightly fixed with its oblique along a helical slice to the inner edges of the spiral partition at the last turn and passes through the middle of the bottom of the device. A nozzle 7 with a fitting for venting gas or air at startup and during operation of the device is likewise mounted on the cover near the axis of the device. Inside the case, a partition 8 is installed,

0 forming a helical channel 9. With a partition wall smaller than the radius of the body, an end-to-end gap is formed along the axis 10. With a partition width equal to the radius of the body, the partitions reach the pipe axis and no end-to-end clearance is formed along the axis.

Spiral partitions can be located perpendicularly and obliquely with their generators to the generatrix of the casing with a constant or variable pitch of the screw. When the spiral partitions are positioned obliquely with their generators to the generatrix of the body of the partition, they look like a spiral truncated cone. When conical

5 of the partition with a large base down between the generators of the housing and the partition, an acute angle is formed on the upper side, which creates a recess 11 in the lower part of the screw channel. In these recesses, mechanical impurities from the emulsion that are discarded by centrifugal forces can accumulate and slide down a helical line.

Between the partition on the last turn and the bottom of the case, when the radial partition 12 is isolated from the screw channel, a space 13 is formed. For the purpose of using it to accumulate mechanical impurities, along the periphery of the partition

0, at the last turn, oblique slots 14 are provided with fenders with vertical visors behind them to pass through mechanical impurities. As accumulation of mechanical impurities from space 13

5 are removed through nozzle 14. Partitions are made of hydrophobic materials or coated with them, and bundles 15 of nylon, dacron, polyamide yarn, yarn or bundles can be attached to them.

The device operates as follows.

The emulsion is emanating tangentially from above the device through the pipe 4 i screw channel 9, formed by spiral baffles 8, tightly adjacent or fixed to the housing 1, and, moving downwards, acquires a rotational movement around the axis of the device. By moving the emulsion along helical 9 in a flowing laminar flow, the larger emulsified oil particles are separated in a few turns to the upper layer of the flow and, simultaneously with their centripetal forces, are rotated to the axis of rotation. During the movement of the emulsion, the particles of light liquid are adsorbed on the hydrophobic surface of the partitions 8, as well as (in the case of their location) on the surface of the free-standing bundles 15 of inthetic threads, bundles, etc. are enlarged and, upon reaching a certain size, are disrupted by the flow. Intense oalescence of the emulsion also occurs ia the free surface of the liquid, which occurs when the flow separates from the upper: septum in the case of a decrease in the amount of emulsion being emitted into the device. Due to the lower height of the layer, the particles reach the surface faster, i.e. liquid-gas phase separation, and. spreading over the surface, intensively merge with each other and with each turn are more and more concentrated towards the spinning flow.

Thus, with the optimal length of the intimate channel, it comes out that is coalesced as a result of the combined action of the above positive actors, contributing to the fusion and strengthening of the contained light particles, pulses,

In the case of processing the emulsion for the purpose of oalescence, containing a small amount of emulsified light fae, for example, an oilfield ode, the emulsion after coalescence is discharged through one nozzle 5 from the screw knew 9 from the bottom of the device and is fed into the toy tank (not shown in the drawings )

The mechanical impurities that may be contained in the emulsion are discarded by centrifugal forces to the periphery of the rotating flow, accumulate at the wall of the structure in the lower part of the screw channel — in the recess 11 formed by the wall of inclined spiral barriers, and are periodically removed when the device is read out. In the case of sliding down the spiral channel at the periphery of the mechanical impurities through the slots located. the partitions located on the last turn fall into the space 13, from where they are removed through the nozzle 5 side 14. The released gases from the axial clearance can be vented through the nozzle 7, and then. in order not to cause a pressure drop in the device, or to exit together with AND particles of oil in the form of a gas-oil mixture 10 through pipe 6. But due to the fact that the device for coalescing the emulsion is not a means of separation, but is a means of intensifying the subsequent process - separation by settling, the co-emulsified emulsion together with the gas-oil mixture must be discharged through one nozzle 5 from the screw channel of the device without causing redispersion, and, under the pressure of the system, by gravity along the shortest path ynoe equipment for settling of the aggregated particles lighter liquid (oil).

Thus, the location of the spiral-shaped partitions is as wide as possible, reaching the middle of the body, and the frequency of their location along the winding j-line, i.e. with a small pitch of the screw, allows more efficient use of the volume of the device, to obtain a thin, high, but wide flow of fluid, contributes to the full use of the centrifugal forces arising in the rotating flow,

All this combined creates the most

5 favorable conditions, improves the hydrodynamics of fluid movement, intensifies the coalescence of the emulsion, and ultimately improves the productivity and efficiency of the operation of the slop

0 devices in front of which the proposed coalescing devices are installed that are simple in design and reliable in operation.

5 ; . ;

Claims (9)

1. A device for coalescing an emulsion, comprising a housing, a continuous spiral partition, which is arranged perpendicularly or obliquely to the axis of the housing, emulsion inlet and phase outlet nozzles, characterized in that, in order to increase the coalescence efficiency, the spiral partition is made equal to a width equal to body radius. 2. The device pop. 1. distinguishing - with the fact that the partition is made with a step 2-6 times smaller than the width of the partition. 3. The device for l, 1. with the exception that the partition is made with a constant step, 4. The device according to claim 1, with the exception of the fact that the partition is made with a variable step. 5. The device according to claim 4, moreover, in that the step of the partition changes stepwise: 6. The device according to claim 5, with the exception that the first 10-16 turns of the partition are made with a step 5-6 times smaller than the width of the partition, and subsequent turns with a step of 5 times smaller septum widths. 7. The device according to claim 4, with the exception of that. that the step of the septum changes gradually. 8. The device pop. 7, characterized in that each subsequent step of the septum is one percent more than the previous one. 9. The device according to claim 1, characterized in that the partition is made of a hydrophobic material or coated with a hydrophobic material and is equipped with bundles of nylon, lavsan, polyamide and other carbon-containing yarns, fixed on its surfaces, yarn or harnesses. / rg / e.2 74 ria.Z 3 12 3LJLJt-s L ffl n-i / JHHfrUPf H- H-i Hnhr Jhhf HHH -JHHfc , -HH -JLJL-F Y - Y -Y-f m / L t ii / w / i-h No. fr 741 / I .trrj 7C / Www Hnhr Jhhf HHH -JHHfc f , -HH -i / L t ii / w / i-h A No. fr rj 7C .  x / cpueff