Oil-water separation and oil recovery device

Abstract

The utility model relates to the field of compression and condensation waste oil-water separation, in particular to an oil-water separation and oil recovery device which comprises an oil separation tank arranged in the middle of a trench, a first partition plate and a second partition plate are sequentially arranged in the oil separation tank in the water flow direction; an oil-water self-priming pump is arranged on the side of the upper part of the oil separation tank, a liquid inlet of the oil-water self-priming pump extends above an oil separation area of the oil separation tank through a first pipeline, a liquid outlet of the oil-water self-priming pump is communicated to the bottom of the oil-water separation tank through a second pipeline, and a plurality of baffles are arranged in the oil-water separation tank in the vertical direction; the bottom of the oil-water separation tank is communicated with a drainage area of the trench through a third pipeline, and the top of the oil-water separation tank is communicated to an oil drum through a fourth pipeline. The oil-water separation device is mainly applied to the waste oil-water separation link of pollution discharge of a large-scale unit, can improve the oil-water separation efficiency through two-time separation of the oil separation tank and the oil-water separation tank, and is high in oil-water separation capacity, large in treatment capacity, low in cost and small in occupied area.

Description

Technical Field

[0001] The utility model relates to the field of compressed condensation waste oil-water separation, in particular to an oil-water separation and oil recovery device. Background Art

[0002] In the chemical production process, large compressor units are used in the gas compression section, such as hydrogen-nitrogen reciprocating compressors, CO2 compressors, etc. Each section of the compressor unit will produce waste oil and water due to compression and condensation, which needs to be discharged regularly to prevent the unit from liquid hammering. After the oil and water are discharged into the ditch, there are certain difficulties in oil-water separation and waste oil recovery. Some traditional small enterprises still use manual oil floating to separate oil and water, which is labor-intensive and has poor separation efficiency. Now some large enterprises have introduced oil-water separation devices, that is, the aluminum sheet crawler immersed in oil and water is driven by a motor to rotate, the oil in the oil and water adheres to the aluminum sheet, and then the oil is hung down by a scraper close to the aluminum sheet and collected into an oil barrel; this oil-water separation method has a slow oil-water separation speed and low separation efficiency. Utility Model Content

[0003] In order to solve the problem of poor separation efficiency of the current oil-water separation method, the utility model provides an oil-water separation and oil recovery device.

[0004] The utility model is realized by the following technical scheme: the oil-water separation and oil recovery device comprises an oil separator arranged in the middle of the trench;

[0005] The grease trap is provided with a first baffle and a second baffle in sequence along the water flow direction. The first baffle and the second baffle divide the interior of the grease trap into a water inlet area, an oil separation area and a clear water area. The oil-water area of ​​the ditch is connected to the water inlet area of ​​the grease trap, and the drainage area of ​​the ditch is connected to the clear water area of ​​the grease trap.

[0006] An oil-water self-priming pump is arranged on the upper side of the grease trap, and the liquid inlet of the oil-water self-priming pump extends into the upper part of the oil separation area of ​​the grease trap through the first pipeline, and the liquid outlet of the oil-water self-priming pump is connected to the bottom of the oil-water separation tank through the second pipeline. A plurality of baffles are arranged in the up and down directions inside the oil-water separation tank, and each baffle cooperates with each other to form a serpentine flow channel. The bottom of the oil-water separation tank is connected to the drainage area of ​​the ditch through the third pipeline, and the top of the oil-water separation tank is connected to the oil barrel through the fourth pipeline.

[0007] As a further improvement of the technical solution of the utility model, a first valve is arranged in series on the second pipeline, a fifth pipeline is connected to the second pipeline between the liquid outlet of the oil-water self-priming pump and the first valve, the fifth pipeline extends into the oil separation area above the oil separator, and a second valve is arranged in series on the fifth pipeline.

[0008] As a further improvement of the technical solution of the utility model, a filter is arranged on the second pipeline.

[0009] As a further improvement of the technical solution of the utility model, a third valve is arranged on the third pipeline.

[0010] As a further improvement of the technical solution of the utility model, the bottom surface of the first partition is higher than the bottom surface of the second partition, and a first liquid density sensor is arranged on the first partition or the second partition, and the horizontal height of the first liquid density sensor is higher than the bottom surface of the first partition.

[0011] As a further improvement of the technical solution of the utility model, a second liquid density sensor is arranged on the second pipeline at the liquid outlet of the oil-water self-priming pump.

[0012] As a further improvement of the technical solution of the utility model, a third liquid density sensor is arranged in the middle of the oil-water separation tank.

[0013] The oil-water separation and oil recovery device provided by the utility model has the following advantages compared with the prior art:

[0014] The utility model is mainly used in the waste oil and water separation link of large-scale unit sewage discharge. Through the double separation in the oil separator and the oil-water separation tank, the oil-water separation efficiency can be improved. The utility model has strong oil-water separation capacity, large processing volume, low cost and small footprint. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings herein are incorporated in and constitute a part of the specification, show embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a structural schematic diagram of the oil-water separation and oil recovery device of the utility model.

[0018] In the figure: 1-ditch, 2-grease trap, 3-first partition, 4-second partition, 5-oil-water self-priming pump, 6-first pipeline, 7-second pipeline, 8-oil-water separation tank, 9-baffle, 10-serpentine flow channel, 11-third pipeline, 12-fourth pipeline, 13-oil drum, 14-fifth pipeline, 15-first valve, 16-second valve, 17-filter, 18-third valve, 19-first liquid density sensor, 20-second liquid density sensor, 21-third liquid density sensor. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the scheme of the utility model will be further described below. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0020] In the description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] The specific embodiments of the present utility model are described in detail below.

[0023] like Figure 1 As shown, the utility model provides a specific embodiment of an oil-water separation and oil recovery device, including an oil separator 2 arranged in the middle of a trench 1;

[0024] The first baffle 3 and the second baffle 4 are sequentially arranged in the grease trap 2 along the water flow direction. The first baffle 3 and the second baffle 4 divide the interior of the grease trap 2 into a water inlet area, an oil separation area and a clean water area. The oil-water area of ​​the ditch 1 is connected to the water inlet area of ​​the grease trap 2, and the drainage area of ​​the ditch 1 is connected to the clean water area of ​​the grease trap 2.

[0025] An oil-water self-priming pump 5 is arranged on the upper side of the grease trap 2, and the liquid inlet of the oil-water self-priming pump 5 extends into the upper part of the oil separation area of ​​the grease trap 2 through the first pipeline 6, and the liquid outlet of the oil-water self-priming pump 5 is connected to the bottom of the oil-water separation tank 8 through the second pipeline 7. A plurality of baffles 9 are arranged inside the oil-water separation tank 8 along the up and down directions, and each baffle 9 cooperates with each other to form a serpentine flow channel 10, the bottom of the oil-water separation tank 8 is connected to the drainage area of ​​the ditch 1 through the third pipeline 11, and the top of the oil-water separation tank 8 is connected to the oil barrel 13 through the fourth pipeline 12.

[0026] In this embodiment, the bottom of the oil separator 2 is lower than the bottom of the ditch 1. The sewage drains of each section of the compressor regularly discharge oil and water into the ditch 1. A certain amount of oil-water mixture is formed in the ditch 1 and flows into the oil separator 2 by the potential difference. The bottom surfaces of the first baffle 3 and the second baffle 4 in the oil separator 2 are spaced from the bottom of the oil separator 2 and are connected to each other. The oil-water mixture in the ditch 1 enters the water inlet area of ​​the oil separator 2. Due to the density difference between oil and water and the principle of like dissolves like, the oil-water mixture gradually separates in the process of passing through the bottom of the first baffle 3. In the oil separator area, the oil basically floats on the surface of the water, forming a thick oil film layer.

[0027] The first pipeline 6 on the oil-water self-priming pump 5 extends to 10 cm below the liquid level in the oil separation area, and the oil-water self-priming pump 5 is started. The oil-water self-priming pump 5 extracts the oil from the oil film layer, and enters the bottom of the oil-water separation tank 8 after passing through the second pipeline 7. The liquid level in the oil-water separation tank 8 gradually rises. A baffle 9 is installed in the oil-water separation tank 8 to prevent back mixing. A separation chamber is formed between adjacent baffles 9. The oil and a small amount of water are effectively separated again in the oil-water separation tank 8. When the liquid level rises to the oil outlet, the fully separated oil flows into the oil barrel 13 along the fourth pipeline 12.

[0028] Specifically, a first valve 15 is provided in series on the second pipeline 7, a fifth pipeline 14 is provided on the second pipeline 7 between the liquid outlet of the oil-water self-priming pump 5 and the first valve 15, the fifth pipeline 14 extends into the oil separation area above the oil separation tank 2, and a second valve 16 is provided in series on the fifth pipeline 14. The bottom surface of the first partition 3 is higher than the bottom surface of the second partition 4, and a first liquid density sensor 19 is provided on the second partition 4, and the horizontal height of the first liquid density sensor 19 is higher than the bottom surface of the first partition 3.

[0029] In this embodiment, the first liquid density sensor 19 is located 30 cm below the inlet of the first pipeline 6. Before starting the oil-water self-priming pump 5, the first liquid density sensor 19 detects the density of the water below the oil film layer. As the oil film layer thickens, the first liquid density sensor 19 detects the density of the oil film layer, and the oil-water self-priming pump 5 is started at this time. Specifically, the liquid density sensor transmits the density signal to the PLC controller, and the PLC controller transmits the density value to the density display after calculation. Those skilled in the art can start the oil-water self-priming pump 5 according to the change of the density value.

[0030] Furthermore, a second liquid density sensor 20 is provided on the second pipeline 7 at the liquid outlet of the oil-water self-priming pump 5. As the oil-water self-priming pump 5 operates, oil and a small amount of water are continuously pumped out, the oil film layer at the inlet of the second pipeline 7 gradually decreases, and the water level under the oil film layer gradually rises. When the second liquid density sensor 20 detects that the density is high, those skilled in the art can shut down the oil-water self-priming pump 5 according to the change in the density value.

[0031] When there is too much oil in the oil-water separation tank 8 and the oil barrel 13 cannot be filled in time, the second valve 16 on the fifth pipeline 14 is opened, the first valve 15 on the second pipeline 7 is closed, and the oil in the second pipeline 7 flows back to the oil separation area through the fifth pipeline 14. After replacing the empty oil barrel 13, the first valve 15 on the second pipeline 7 is opened, the second valve 16 on the fifth pipeline 14 is closed, and the oil in the second pipeline 7 continues to be sent to the oil-water separation tank 8.

[0032] In some embodiments, a third liquid density sensor 21 is provided in the middle of the oil-water separation tank 8. A small amount of water will still enter the oil-water separation tank 8 during long-term operation, and the bottom water level will gradually rise. When the third liquid density sensor 21 detects the density rise, the third valve 18 provided on the third pipeline 11 is opened to discharge the bottom water. After the water level drops, the third liquid density sensor 21 detects the density drop and closes the third valve 18. The accumulated water in the oil-water separation tank 8 and the water in the clear water area of ​​the grease trap 2 are discharged to the drainage area of ​​the ditch 1 for subsequent recycling.

[0033] As shown in the figure, in this embodiment, the inlet of the third pipeline 11 is located below the lowest baffle 9, and the fourth pipeline 12 is located above the highest baffle 9. And the outlet in the second pipeline 7 is located below the lowest baffle 9.

[0034] On the basis of the above embodiment, in a preferred embodiment, a filter 17 is provided on the second pipeline 7. The filter 17 can filter impurities in the oil and reduce the content of impurities in the oil in the oil-water separation tank 8. As shown in the figure, the filter 17 is located at the outlet of the first valve 15.

[0035] The above is only a specific implementation of the utility model, which enables those skilled in the art to understand or implement the utility model. Although detailed descriptions are given with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. Oil-water separation and oil recovery device, characterized in that: It comprises a grease trap (2) arranged in the middle of the trench (1); A first baffle (3) and a second baffle (4) are sequentially arranged in the grease trap (2) along the water flow direction. The first baffle (3) and the second baffle (4) divide the interior of the grease trap (2) into a water inlet area, an grease trap area and a clean water area. The oil-water area of ​​the ditch (1) is connected to the water inlet area of ​​the grease trap (2), and the drainage area of ​​the ditch (1) is connected to the clean water area of ​​the grease trap (2). An oil-water self-priming pump (5) is arranged on the upper side of the oil separator (2). The liquid inlet of the oil-water self-priming pump (5) extends into the upper part of the oil separator area of ​​the oil separator (2) through a first pipeline (6). The liquid outlet of the oil-water self-priming pump (5) is connected to the bottom of the oil-water separation tank (8) through a second pipeline (7). A plurality of baffles (9) are arranged inside the oil-water separation tank (8) along the vertical direction. The baffles (9) cooperate with each other to form a serpentine flow channel (10). The bottom of the oil-water separation tank (8) is connected to the drainage area of ​​the ditch (1) through a third pipeline (11). The top of the oil-water separation tank (8) is connected to the oil barrel (13) through a fourth pipeline (12).

2. The oil-water separation and oil recovery device according to claim 1, characterized in that: A first valve (15) is arranged in series on the second pipeline (7); a fifth pipeline (14) is connected to the second pipeline (7) between the liquid outlet of the oil-water self-priming pump (5) and the first valve (15); the fifth pipeline (14) extends into the upper part of the oil separation area of ​​the oil separator (2); and a second valve (16) is arranged in series on the fifth pipeline (14).

3. The oil-water separation and oil recovery device according to claim 1, characterized in that: The second pipeline (7) is provided with a filter (17).

4. The oil-water separation and oil recovery device according to claim 1, characterized in that: The third pipeline (11) is provided with a third valve (18).

5. The oil-water separation and oil recovery device according to claim 1, characterized in that: The bottom surface of the first partition (3) is higher than the bottom surface of the second partition (4), and a first liquid density sensor (19) is provided on the first partition (3) or the second partition (4), and the horizontal height of the first liquid density sensor (19) is higher than the bottom surface of the first partition (3).

6. The oil-water separation and oil recovery device according to claim 1, characterized in that: A second liquid density sensor (20) is provided on the second pipeline (7) at the liquid outlet of the oil-water self-priming pump (5).

7. The oil-water separation and oil recovery device according to claim 1, characterized in that: A third liquid density sensor (21) is arranged in the middle of the oil-water separation tank (8).

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