CN112090118A

CN112090118A - Separation device and separation experiment method for thick oil mixed with thin liquid

Info

Publication number: CN112090118A
Application number: CN201910527438.8A
Authority: CN
Inventors: 任波; 张园; 彭振华; 李亮; 丁雯; 任向海; 高定祥; 许强; 康红兵; 孙桓; 曹畅
Original assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-12-18
Anticipated expiration: 2039-06-18
Also published as: CN112090118B

Abstract

The invention relates to a separation device for thick oil mixed with thin liquid and a corresponding separation experiment method. The device includes: a container for holding the heavy oil thin dope; and a heating mechanism configured to heat the thick oil dope in the container so that the thick oil dope in the container can be layered by standing. The device can realize simple and efficient separation of the thick oil mixed with the thin liquid.

Description

Separation device and separation experiment method for thick oil mixed with thin liquid

Technical Field

The invention relates to the technical field of separation of thick oil mixed with thin liquid, in particular to a separation device for thick oil mixed with thin liquid. The invention also relates to a method for carrying out separation experiments using the device.

Background

The thickened oil is crude oil which is widely distributed all over the world, and the reserve is about 1000 multiplied by 10⁸t, is a hot spot in global crude oil production. Heavy oil is extremely viscous and therefore difficult to recover directly. The current exploitation method is to mix diluent into the thick oil and mix to form the thick oil diluted liquid with lower viscosity for exploitation. However, the proportion of the diluent in the heavy oil dope is large. On the one hand, this results in very high costs for the recovery of the thick oil. On the other hand, this also results in the use efficiency of the heavy oil dope being much lower than that of the heavy oil itself. Therefore, from an application point of view, it is highly desirable to be able to subdivide the thick oil and the thin liquid in the produced thick oil thin liquid. Therefore, the diluent can be reused, and the thick oil can be effectively applied.

However, there is currently no apparatus and method for separating the thick oil from the diluent more efficiently.

Disclosure of Invention

Aiming at the problems, the invention provides a separation device for thick oil mixed with thin liquid. The device can realize simple and efficient separation of the thick oil mixed with the thin liquid. In addition, the invention also provides a method for carrying out the separation experiment by using the device.

According to a first aspect of the present invention, a separation device for thick oil dilution liquid is provided, comprising: a container for holding the heavy oil thin dope; and a heating mechanism configured to heat the thick oil dope in the container so that the thick oil dope in the container can be layered by standing.

The thick oil has a greater density and the dilute liquid has a lesser density. And the thick oil mixed with the thin liquid can be layered by standing for a period of time. Thickened oils tend to sink in the lower layer, while the dilution tends to float in the upper layer. However, the pure standing stratification is very slow, so in the process, the container and the thick oil blending liquid therein are heated by a heating mechanism to accelerate the stratification of the thick oil blending liquid. The heating and standing mode is beneficial to conveniently, quickly and inexpensively layering the thick oil mixed with the thin liquid. After separation, the thick oil and the dilution liquid can be conveniently extracted separately.

In one embodiment, the heating mechanism comprises: a water bath tank in which the container is housed; a water bath configured to heat water therein; and the communicating pipe is connected between the water bath tank and the water bath and used for transferring water between the water bath tank and the water bath.

In one embodiment, the container comprises a plurality of containing units stacked one above the other in the longitudinal direction, the plurality of containing units being configured to be detachable with respect to each other, each containing unit being configured with a selectively openable bottom panel, wherein in a first state the bottom panel is open and the plurality of containing units are in fluid communication with each other, and in a second state the bottom panel is closed and the plurality of containing units are in fluid separation from each other.

In one embodiment, the base plate includes: a fixed portion provided with a flow-through opening; a movable portion selectively covering the flow-through opening; and a drive mechanism configured to drive the movable portion so as to cover or be away from the flow-through opening.

In one embodiment, the fastening portion is configured as an annular fastening portion, the flow opening being configured in the center of the fastening portion.

In one embodiment, the floor comprises a plurality of movable portions circumferentially spaced from each other, each movable portion covering only a part of the flow-through opening, a plurality of the movable portions together covering the entire flow-through opening.

In one embodiment, the drive mechanism comprises: a drive ring rotatable relative to the fixed portion and spaced from the movable portion in a radial direction; and a driving link having one end hinged to the driving ring through a first hinge and the other end hinged to the movable portion through a second hinge; wherein the movable portion is hinged to the fixed portion by a third hinge, the third hinge and the second hinge are spaced from each other in the circumferential direction, and in the first rotational direction, the second hinge is more forward than the first hinge and the third hinge, and when the drive ring rotates, the drive link is driven to move in the circumferential direction and rotate around the first hinge, thereby driving the movable portion to rotate around the third hinge to cover or leave the flow opening.

In one embodiment, the movable portion is configured as a sector, both sides of the sector being arc-shaped.

According to a second aspect of the present invention, there is provided a method of performing a separation experiment using the apparatus described above, the method comprising: firstly, thick oil diluted liquid is placed in the container; secondly, heating the thick oil dilution liquid to a preset temperature through the heating mechanism, and standing the container and the thick oil dilution liquid within a preset time; and a third step of measuring the viscosity of the liquid at different depth positions in the container, respectively.

In one embodiment, the vessel comprises a plurality of receiving units stacked one above the other in the longitudinal direction, which are configured to be detachable with respect to one another, each of which is configured with a selectively openable floor, wherein in a first state the floor is open and the receiving units are in fluid communication with one another, and in a second state the floor is closed and the receiving units are fluidly separated from one another, the method using a plurality of the separation devices for thick oil dilution, in which second step the predetermined temperature and/or the predetermined time for each of the separation devices for thick oil dilution is different, in which third step the receiving units are separated from one another and the viscosity of the liquid in each receiving unit is measured.

Compared with the prior art, the invention has the advantages that: and the thick oil mixed with the thin liquid can be layered by standing for a period of time. Thickened oils tend to sink in the lower layer, while the dilution tends to float in the upper layer. However, the pure standing stratification is very slow, so in the process, the container and the thick oil blending liquid therein are heated by a heating mechanism to accelerate the stratification of the thick oil blending liquid. The heating and standing mode is beneficial to conveniently, quickly and inexpensively layering the thick oil mixed with the thin liquid. After separation, the thick oil and the dilution liquid can be conveniently extracted separately.

Drawings

The invention is described in more detail below with reference to the accompanying drawings. Wherein:

FIG. 1 shows a schematic diagram of a separation apparatus for thick oil thin dope according to an embodiment of the present invention;

FIG. 2 shows an embodiment of a container in the separation device of FIG. 1;

FIG. 3 shows one embodiment of a containment unit in the container of FIG. 2;

FIG. 4 shows one embodiment of the bottom panel of the containment unit in the container of FIG. 3;

fig. 5 shows another state of the base plate in fig. 4.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Detailed Description

The invention will be further explained with reference to the drawings.

Fig. 1 schematically shows an embodiment of a separation apparatus 100 for thick oil thin dope (hereinafter simply referred to as "apparatus 100").

The apparatus 100 includes a vessel 1 which can be used to hold a thick oil dope. The container 1 is placed in a water bath tank 2. The water bath tank 2 can contain water so that the entire container 1 can be surrounded by the water in the water bath tank 2. The water bath tank 2 is in fluid communication with the water bath 5 through the communication pipe 3. The water bath 5 can be used to heat the water therein. The heated water in the water bath 5 can flow into the water bath tank 2 through the communication pipe 3. The water in the water bath tank 2 can also be re-flowed back to the water bath 5 through the communicating tube 3 to be heated again. In the embodiment shown in fig. 1, two communicating tubes 3 are provided, which can be used for passing water from the water bath 5 to the water bath tank 2 and for passing water from the water bath tank 2 to the water bath 5, respectively. However, it should be understood that, if necessary, only one communication pipe may be provided to achieve the above-described two-way communication, or more communication pipes may be provided to achieve the above-described two-way communication.

Apparatus 100 may also include a timer 4 and a viscometer 6. Thus, the device 100 can be used for carrying out separation experiments of thick oil dilution liquid. The thick oil diluted solution can be injected into the container 1, and the container 1 is placed in a water bath tank 2 filled with hot water. And (3) standing for a preset time to realize the layering of the thick oil mixed thin liquid. Whether the time reaches the predetermined time can be determined by the timer 4. And after the preset time is reached, the thick oil is mixed with the thin liquid to realize layering. The upper layer liquid is mostly diluent, and the lower layer liquid is mostly thick oil. The liquids of the upper and lower layers can then be conveniently separated. For example, the liquid in the upper and lower layers can be separated by layer-by-layer extraction. Alternatively, the liquids of the upper and lower layers may be separated in the following preferred manner. It should be understood that although "upper layer liquid" and "lower layer liquid" are referred to herein, it should be understood that this merely expresses a relative concept. The operator can separate the liquid in upper, middle, lower or more layers as desired. The liquids of the different layers may have different proportions of thick oil and dilution liquid.

Fig. 2 shows that the container 1 can be formed by a plurality of containing units 10. These containing units 10 may be stacked one on another in the longitudinal direction. The bottom of the receiving unit 10 is selectively opened. Thus, in the first state, the bottom of the upper containing unit 10 is opened so as to be in fluid communication with the lower containing unit 10. During the standing process, the thickened oil at the upper part is precipitated downwards, and the thickened oil mixed with the diluted liquid at the lower part floats upwards. After the end of the standing, in the second state, the bottom of the upper housing unit 10 is closed. Thereby, the upper containing unit 10 is no longer in fluid communication with the lower containing unit 10. At this time, the upper accommodation unit 10 and the lower accommodation unit 10 may be separated from each other. It should be understood that the bottom of the lowermost containing unit 10 may be configured to be permanently closed.

As shown in fig. 3, the single accommodation unit 10 may include a substantially cylindrical side wall 11, and a bottom plate 12 extending in a lower end of the side wall 11. The sidewall 11 may be configured with an upper coupling groove 111 at an inner side of an upper end thereof, and a lower coupling groove 112 at an outer side of a lower end thereof. The lower connecting groove 112 of the upper receiving unit 10 is inserted into the upper opening of the lower receiving unit 10 and is tightly engaged with the upper connecting groove 111 of the lower receiving unit 10, thereby achieving liquid-tight and stable engagement between the receiving units 10. It should be understood that the uppermost receiving unit 10 may not be provided with the upper receiving groove 111, and the lowermost receiving unit 10 may not be provided with the lower receiving groove 112.

Fig. 4 and 5 show a top view of a selectively openable bottom panel 12. Fig. 4 shows the case where the bottom plate 12 is in the closed state, and fig. 5 shows the case where the bottom plate 12 is in the open state.

The bottom plate 12 includes a ring-shaped fixing portion 122, and an outer edge of the ring-shaped fixing portion 122 is fixedly connected to the side wall 11. A circular opening 128 is formed at the center of the ring portion 122 (see fig. 5). The opening 128 may be selectively covered by a plurality of movable portions 125. For example, in fig. 4, the plurality of movable portions 125 together cover the entire opening 128, thereby closing the bottom panel 12. In fig. 5, each movable portion 125 is offset from the opening 128 so that the opening 128 can be exposed and the base 12 opened. The opening and closing of the base plate 12 can be achieved by a drive mechanism. The drive mechanism includes a drive ring 121 that covers at the outer edge of the fixed portion 122, and a drive link 123 that is connected between the drive ring 121 and the movable portion 125. The drive ring 121 is rotatable relative to the fixed portion 122. The driving link 123 has one end connected to the driving ring 121 through a first hinge 124 and the other end connected to the movable portion 125 through a second hinge 126. The movable portion 125 is in turn connected to the fixed portion 122 by a third hinge 127. The third hinge 127 is spaced apart from the second hinge 126. In the first rotational direction (counterclockwise in fig. 4), the second hinge 126 is more forward than the first hinge 124 and the third hinge 127. Thus, at the transition from FIG. 4 to FIG. 5, drive ring 124 rotates in a clockwise direction and thereby drives drive link 123 in translation in a clockwise direction while also rotating clockwise. Thereby, the movable portion 125 is allowed to rotate clockwise about the third hinge 127 away from the opening 128. Conversely, when transitioning from fig. 5 to fig. 4, drive ring 124 rotates in a counterclockwise direction, thereby driving drive link 123 to translate in a counterclockwise direction while also rotating in a counterclockwise direction. This drives the movable portion 125 to rotate counterclockwise about the third hinge 127 to cover the opening 128.

In fig. 4 and 5, a form in which 5 movable portions are evenly arranged in the circumferential direction is shown. However, it should be understood that more or fewer moving parts may be provided as desired. For example, 1, 2, 3, 4, 6, 7 or more active portions may be provided.

Preferably, in the case where a plurality of movable portions 125 are provided, each movable portion 125 may be configured to have a substantially fan shape, and both side edges of the fan shape are configured to be arc-shaped. Thus, the respective movable portions 125 can be more stably and smoothly overlapped and relatively moved.

In the embodiment shown in fig. 4, the driving link 123 is hinged to the movable portion 125 at a position near the bottom edge of the movable portion 125 of the sector. In another embodiment, the driving link 123 is hinged to the movable portion 125 at a position of a top corner of the movable portion 125 of the sector (i.e., at a position near the center of the entire circular base plate 12). In this case, it is more advantageous to ensure the structural stability of the bottom plate 12.

A method for performing a separation experiment using the above-described apparatus 100 is set forth below.

First, a plurality of the above-described apparatuses 100 are prepared.

Then, the thick oil thin dope is injected into the vessel 1 of each apparatus 100. Each container 1 is composed of a plurality (at least 2) of containing units 10. At this time, the respective containing units 10 of the same container 1 are in fluid communication with each other.

Thereafter, the devices 100 are left to stand at the same predetermined temperature for different predetermined times and/or at different predetermined temperatures for the same predetermined time.

Then, the respective containing units 10 in the respective containers 1 are fluidically separated from each other and detached. The viscosity of the liquid in each containing unit is measured by a viscometer 6.

By the above process, a comparison of the degree of stratification at different temperature gradients and/or time gradients can be obtained. From this, the optimal separation temperature and/or separation time can be further determined.

The device 100 and the method can be used for obtaining the optimal separation temperature and/or separation time of the thick oil mixed dilute solution. The obtained separation temperature and/or separation time can be applied to actual engineering operation so as to realize quick and effective separation of the thick oil mixed thin liquid.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A separation device for thick oil dilution liquid comprises:

a container for holding the heavy oil thin dope; and

a heating mechanism configured to heat the thick oil dope in the container so that the thick oil dope in the container can be layered by standing.

2. The separation device for thick oil dilution liquid according to claim 1, wherein the heating mechanism comprises:

a water bath tank in which the container is housed;

a water bath configured to heat water therein;

and the communicating pipe is connected between the water bath tank and the water bath and used for transferring water between the water bath tank and the water bath.

3. The separation device for thick oil thin dope according to claim 1 or 2, wherein the container comprises a plurality of containing units stacked in sequence in a longitudinal direction, the plurality of containing units being configured to be detachable with respect to each other, each containing unit being configured with a selectively openable bottom plate, wherein in a first state the bottom plate is open and the plurality of containing units are in fluid communication with each other, and in a second state the bottom plate is closed and the plurality of containing units are fluidly separated from each other.

4. The separation device for thick oil dilution liquid according to claim 3, wherein the bottom plate comprises:

a fixed portion provided with a flow-through opening;

a movable portion selectively covering the flow-through opening; and

a drive mechanism configured to drive the movable portion so as to cover or be away from the flow-through opening.

5. The separation device for thick oil dilution liquid according to claim 4, wherein the fixed portion is configured as an annular fixed portion, and the flow-through opening is configured at a center of the fixed portion.

6. The separation device for thick oil dilution liquid according to claim 5, wherein the bottom plate includes a plurality of movable portions spaced from each other in a circumferential direction, each of the movable portions covering only a part of the flow-through opening, and a plurality of the movable portions together can cover the entire flow-through opening.

7. The separation device for thick oil dilution liquid according to claim 6, wherein the driving mechanism comprises:

a drive ring rotatable relative to the fixed portion and spaced from the movable portion in a radial direction; and

a driving link having one end hinged to the driving ring through a first hinge and the other end hinged to the movable portion through a second hinge;

wherein the movable portion is hinged to the fixed portion by a third hinge, the third hinge and the second hinge are spaced apart from each other in a circumferential direction, the second hinge is more forward than the first hinge and the third hinge in a first rotational direction,

when the driving ring rotates, the driving link can be driven to move along the circumferential direction and rotate around the first hinge, thereby driving the movable part to rotate around the third hinge to cover or leave the circulating opening.

8. The separation device for thick oil dilution liquid according to claim 6 or 7, wherein the movable part is configured in a sector shape, and both side edges of the sector shape are arc-shaped.

9. A method of performing separation experiments using the separation apparatus for thick oil thin dope of any one of claims 1 to 8, the method comprising:

firstly, thick oil diluted liquid is placed in the container;

secondly, heating the thick oil dilution liquid to a preset temperature through the heating mechanism, and standing the container and the thick oil dilution liquid within a preset time; and

and thirdly, respectively measuring the viscosity of the liquid at different depth positions in the container.

10. The method of claim 9, wherein the container comprises a plurality of containment units stacked one on top of the other in a longitudinal direction, the plurality of containment units being configured to be detachable with respect to one another, each of the containment units being configured with a selectively openable floor, wherein in a first state the floor is open and the plurality of containment units are in fluid communication with one another, and in a second state the floor is closed and the plurality of containment units are fluidly isolated from one another,

the method uses a plurality of the separation devices for thick oil thin blending liquid, in the second step, the predetermined temperature and/or the predetermined time are different for each separation device for thick oil thin blending liquid,

in the third step, the respective containing units are separated from each other, and the viscosity of the liquid in the respective containing units is measured.