Oil-water separation safety dehydration system

Abstract

The utility model discloses an oil-water separation safety dehydration system, which belongs to the technical field of oil-water separation. The technical scheme is as follows: it includes an oil-water separator, a dehydration bag and a controller. The oil-water separator is provided with an oil phase space and a water phase space. The oil phase space is provided with a remote radar level gauge and an oil phase outlet. The water phase space is provided with an on-site magnetic flap level gauge and a water phase outlet. The oil phase outlet is connected to an oil phase outlet pipeline, and the oil phase outlet pipeline is connected to a return distillation tower pipeline and an external delivery pipeline to a downstream; the water phase outlet is connected to a water phase outlet pipeline, and the water phase outlet pipeline is connected to a dehydration bag; the dehydration bag is connected to a nitrogen supply pipeline and a water phase sewage discharge pipeline; a water phase to oil phase external delivery pipeline is connected between the oil phase outlet pipeline and the water phase outlet pipeline. The utility model adopts a fully enclosed design, and the oil-water separation process is remotely and automatically operated through a switch valve to avoid personnel from contacting toxic substances and ensure intrinsic safety.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil-water separation, and in particular relates to an oil-water separation safety dehydration system. Background Art

[0002] The oil-water separator is a common and commonly used equipment in the chemical industry to achieve the separation of immiscible oil and water phases. The oil-water separator uses a partition to divide its internal space into two independent sub-spaces. The lower sections of the two sub-spaces are independent of each other, and the upper sections are connected. In one of the spaces, the density of the water phase and the oil phase is different. After standing, the water phase with high density sinks to the bottom, and the oil phase with low density floats on the top. This space is the water phase space. When the oil in the water phase space is higher than the partition, it will overflow to the other side of the space, which is the oil phase space. Under the premise of continuous feeding of the water phase space, the water in the water phase space and the oil in the oil phase space are continuously extracted to achieve oil-water separation. In the process of separating a mixture with a small difference in the components of the oil and water phases, it is only necessary to pump out the oil phase and the water phase in the separator respectively according to the proportion. However, the existing oil-water separator cannot be used for mixtures with a water phase component far less than the oil phase component, especially when the oil phase component is a highly toxic substance, and it is impossible to achieve safe removal of water in the oil-water separator. Utility Model Content

[0003] The utility model provides an oil-water separation safety dehydration system, which adopts a fully enclosed design. The oil-water separation process is remotely and automatically operated through a switch valve, thereby preventing personnel from contacting toxic substances and ensuring safety.

[0004] The technical solution of the utility model is:

[0005] A safe oil-water separation and dehydration system comprises an oil-water separator, a dehydration bag and a controller, wherein the oil-water separator is provided with an oil phase space and a water phase space, wherein the oil phase space is provided with a remote radar level gauge and an oil phase outlet, and the water phase space is provided with an on-site magnetic flap level gauge and a water phase outlet, wherein the remote radar level gauge is electrically connected to the controller; the oil phase outlet is connected to an oil phase outlet pipeline, wherein the oil phase outlet pipeline is connected to a return distillation tower pipeline and an external delivery pipeline to a downstream; the water phase outlet is connected to a water phase outlet pipeline, wherein the water phase outlet pipeline is connected to the dehydration bag; the dehydration bag is provided with a pressure sensor, an on-site magnetic flap level gauge and a remote differential pressure level gauge, wherein the pressure sensor and the remote differential pressure level gauge are both electrically connected to the controller, and the dehydration bag is connected to a nitrogen supply pipeline and a water phase sewage discharge pipeline; a water phase to oil phase external delivery pipeline is connected between the oil phase outlet pipeline and the water phase outlet pipeline, wherein a switch valve is provided on the water phase to oil phase external delivery pipeline, and wherein the switch valve is electrically connected to the controller.

[0006] Preferably, the volume ratio of the oil phase space to the water phase space is 16:1.

[0007] Preferably, an oil phase delivery pump is provided on the oil phase outlet pipeline.

[0008] Preferably, a water phase discharge switching valve is provided on the water phase outlet pipeline.

[0009] Preferably, a limiting flow orifice plate and a nitrogen replenishment switch valve are provided on the nitrogen replenishment pipeline, and the nitrogen replenishment switch valve is electrically connected to the controller.

[0010] Preferably, a water phase sewage discharge switching valve is provided on the water phase sewage discharge pipeline.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The utility model adopts a fully enclosed design, and the oil-water separation process is remotely and automatically operated to avoid personnel contact with toxic substances and ensure safety.

[0013] 2. The utility model adjusts the frequency of removing the water phase in real time according to the ratio of oil to water in the oil-water mixture and the liquid level height in the water phase space to achieve separation of the oil-water mixture with low water content.

[0014] 3. The dehydration bag of the utility model provides driving power through nitrogen, which reduces the operating cost of the device.

[0015] 4. The utility model is provided with a water phase to oil phase delivery pipeline. When the toxic oil phase in the water phase, such as acrylonitrile, exceeds the standard under abnormal working conditions, the control valve on the water phase to oil phase delivery pipeline can be opened to recycle the toxic oil phase in the water phase.

[0016] 5. The volume ratio of the oil phase space to the water phase space is about 16:1. A remote radar level gauge LI is set in the oil phase space, and an on-site magnetic flap level gauge LG is set in the water phase space to monitor the oil and water phase levels in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] In the figure, 1. oil-water separator; 2. dehydration bag; 3. oil phase space; 4. water phase space; 6. remote radar level gauge 1; 7. oil phase outlet; 8. on-site magnetic flap level gauge 1; 9. water phase outlet; 10. return distillation tower pipeline; 11. external delivery to downstream pipeline; 12. pressure sensor; 13. on-site magnetic flap level gauge 2; 14. remote differential pressure level gauge; 15. nitrogen supply pipeline; 1501. flow limiting orifice; 1502. nitrogen supply switch valve; 16. water phase sewage pipeline; 17. water phase to oil phase external delivery pipeline; 18. oil phase outlet pipeline; 19. water phase outlet pipeline; 1901. water phase discharge switch valve. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0020] Example 1

[0021] like Figure 1 As shown, a mixture of acrylonitrile and water is used as the oil-water mixture to be separated. This embodiment provides an oil-water separation safety dehydration system, including an oil-water separator 1, a dehydration bag 2 and a controller. The oil-water separator 1 is provided with an oil phase space 3 and a water phase space 4, and the volume ratio of the oil phase space 3 to the water phase space 4 is 16:1; a water separation tank is provided at the bottom of the water phase space 4, the oil phase space 3 is provided with a remote radar level gauge 6 and an oil phase outlet 7, the water phase space 4 is provided with an on-site magnetic flap level gauge 8 and a water phase outlet 9, and the remote radar level gauge 6 is electrically connected to the controller; the oil-water separator 1 is connected to an oil-water mixed phase feed pipeline;

[0022] The oil phase outlet 7 is connected to the oil phase outlet pipeline 18, and an oil phase delivery pump is arranged on the oil phase outlet pipeline 18; the oil phase outlet pipeline 18 is connected to the return distillation tower pipeline 10 and the delivery pipeline 11 to the downstream;

[0023] The water phase outlet 9 is connected to a water phase outlet pipeline 19, on which a water phase discharge switch valve 1901 is arranged, and the water phase outlet pipeline 19 is connected to the dehydration bag 2;

[0024] The dehydration bag 2 is provided with a pressure sensor 12, an on-site magnetic flap level gauge 13 and a remote differential pressure level gauge 14. The pressure sensor 12 and the remote differential pressure level gauge 14 are both electrically connected to the controller. The dehydration bag 2 is connected with a nitrogen supply pipeline 15 and a water phase sewage discharge pipeline 16; a limiting flow orifice plate 1501 and a nitrogen supply switch valve 1502 are provided on the nitrogen supply pipeline 15, and the nitrogen supply switch valve 1502 is electrically connected to the controller; a water phase sewage discharge switch valve is provided on the water phase sewage discharge pipeline 16;

[0025] A water-to-oil-phase delivery pipeline 17 is connected between the oil-phase outlet pipeline 18 and the water-phase outlet pipeline 19 , and a control valve is provided on the water-to-oil-phase delivery pipeline 17 .

[0026] The specific working process is as follows: the oil-water mixture containing two phases of oil and water enters the bottom of the oil-water separator 1 through the oil-water mixed phase feed pipeline, the heavy water accumulates at the bottom of the water tank of the oil-water separator 1, and the light component oil phase accumulates at the upper part of the oil-water separator 1. In the initial state, the water content in the water phase space is small, and most of it is oil. With the continuous addition of the oil-water mixture, the water in the water phase space gradually accumulates. After the water phase space 4 of the oil-water separator 1 is full of liquid, the water phase is discharged into the dehydration bag 2 through the water phase discharge switch valve 1901. The dehydration bag 2 is respectively provided with a remote differential pressure level meter L I and the on-site magnetic flap level gauge 2 LG monitor the liquid level of the dehydration bag. The water in the dehydration bag 2 is regularly sent to the sewage system through the water phase sewage discharge switch valve according to the liquid level. The dehydration bag is equipped with a remote pressure gauge PI to monitor the pressure of the dehydration bag; the dehydration bag 2 is equipped with a nitrogen replenishment pipeline 15 to increase the pressure of the dehydration bag 2 as a sewage discharge power. The nitrogen replenishment pipeline 15 is equipped with a flow limiting orifice FO to limit the maximum flow of nitrogen, and a nitrogen replenishment switch valve 1502 is provided to remotely control the flow. The oil phase of the oil-water separator 1 is returned to the distillation tower pipeline through the oil phase delivery pump or sent to the downstream pipeline for recycling. When the toxic oil phase in the water phase, such as acrylonitrile, exceeds the standard under abnormal conditions, the control valve on the water phase to oil phase delivery pipeline 17 can be opened to recycle the toxic oil phase in the water phase.

[0027] Although the present invention is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person skilled in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. Oil-water separation safety dehydration system, characterized by: The invention comprises an oil-water separator (1), a dehydration bag (2) and a controller. The oil-water separator (1) is provided with an oil phase space (3) and a water phase space (4). The oil phase space (3) is provided with a remote radar level gauge (6) and an oil phase outlet (7). The water phase space (4) is provided with an on-site magnetic flap level gauge (8) and a water phase outlet (9). The remote radar level gauge (6) is electrically connected to the controller. The oil phase outlet (7) is connected to an oil phase outlet pipeline (18), and the oil phase outlet pipeline (18) is connected to a pipeline (10) returning to the distillation tower and a pipeline (11) for sending to a downstream; The water phase outlet (9) is connected to a water phase outlet pipeline (19), and the water phase outlet pipeline (19) is connected to a dehydration bag (2); The dehydration bag (2) is provided with a pressure sensor (12), a second on-site magnetic flap liquid level gauge (13) and a remote differential pressure liquid level gauge (14); the pressure sensor (12) and the remote differential pressure liquid level gauge (14) are both electrically connected to the controller; the dehydration bag (2) is connected to a nitrogen supply pipeline (15) and a water phase sewage discharge pipeline (16); A water-to-oil-phase delivery pipeline (17) is connected between the oil-phase outlet pipeline (18) and the water-phase outlet pipeline (19), and a control valve is provided on the water-to-oil-phase delivery pipeline (17).

2. The oil-water separation safety dehydration system according to claim 1, characterized in that: The volume ratio of the oil phase space (3) to the water phase space (4) is 16:

1.

3. The oil-water separation safety dehydration system according to claim 1, characterized in that: An oil phase delivery pump is provided on the oil phase outlet pipeline (18).

4. The oil-water separation safety dehydration system according to claim 1, characterized in that: A water phase discharge switch valve (1901) is provided on the water phase outlet pipeline (19).

5. The oil-water separation safety dehydration system according to claim 1, characterized in that: A limiting flow orifice plate (1501) and a nitrogen replenishment switch valve (1502) are provided on the nitrogen replenishment pipeline (15), and the nitrogen replenishment switch valve (1502) is electrically connected to the controller.

6. The oil-water separation safety dehydration system according to claim 1, characterized in that: A water phase sewage discharge switch valve is provided on the water phase sewage discharge pipeline (16).

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