Oil-water separation tank

Abstract

The utility model relates to an oil-water separation tank which comprises a tank body, a liquid inlet pipe is fixed at the right end of the top of the tank body, a partition plate is fixed at the bottom of the tank body, an overflow space is arranged between the top of the partition plate and the top of the tank body, a mud collecting tank is arranged at the bottom of the tank body on the right side of the partition plate, and a mud pumping pipe is arranged at the bottom of the mud collecting tank and connected with a mud pump. A water pumping pipe is fixed to the middle of the right end of the tank and connected with a water pump, an outlet of the water pump is connected with a return pipe, the return pipe is connected with a spraying water inlet pipe of the spraying tower and connected with a heat exchanger, and an oil pumping pipe is fixed to the bottom of the left end of the tank and connected with an oil well pump. The oil-water separation device can be used for separating oil and water, separated oil floating at the uppermost part of the right side of the partition plate overflows to the left side of the partition plate through the upper part of the partition plate, oil separation and collection are carried out, and water is pumped out through the water suction pump, cooled by the heat exchanger and then introduced into the spray tower for cyclic utilization.

Description

Technical Field

[0001] The utility model relates to an oil-water separation tank and belongs to the technical field of oil-water separation equipment. Background Art

[0002] When treating oil sludge, the oil and gas will be separated and processed, and then condensed and cooled by the condensing device to recover the oil and gas. The traditional condensing device uses a plate heat exchanger, but such a structure has a poor condensation effect, and the oil and gas contain a large amount of oil sludge particles, which are easily attached to the heat exchange plate, affecting the heat exchange effect and blocking the air outlet channel of the heat exchange plate. Therefore, we use a spray tower to spray and recover the oil and gas, but the recovered oil will contain a large amount of water and some mud, so a special oil-water separation tank is needed to separate the mixed liquid after spraying. Utility Model Content

[0003] The utility model provides an oil-water separation tank, which solves the problem that the oil and water cannot be separated after the oil and gas are sprayed and recovered.

[0004] The utility model relates to an oil-water separation tank, comprising a tank body, a liquid inlet pipe is fixed to the right end of the top of the tank body, a partition is fixed to the bottom of the tank body, an overflow distance is arranged between the top of the partition and the top of the tank body, a mud collecting trough is arranged on the bottom of the tank body on the right side of the partition, a mud suction pipe is arranged at the bottom of the mud collecting trough, the mud suction pipe is connected to a mud suction pump, a water suction pipe is fixed to the middle part of the right end of the tank body, the water suction pipe is connected to the water suction pump, the outlet of the water suction pump is connected to a reflux pipe, the reflux pipe is connected to the spray water inlet pipe of a spray tower, the reflux pipe is connected to a heat exchanger, an oil suction pipe is fixed to the bottom of the left end of the tank body, and the oil suction pipe is connected to the oil suction pump.

[0005] As a preferred embodiment, a filter is provided on the water suction pipe to filter out dust in the water.

[0006] As a preferred embodiment, an exhaust pipe is provided on the left side of the top of the tank body.

[0007] As a preferred embodiment, a transparent liquid level observation tube is fixed at the lower middle part of the right end of the tank body, a limiting net is arranged in the liquid level observation tube, and a floating ball is arranged above the limiting net, so as to facilitate observation of the liquid level.

[0008] As a preferred embodiment, a contact switch is provided on the top of the liquid level observation tube, the contact switch is connected to a controller, the controller is connected to a water pump, and when the water level reaches the pumping level, the water pump can be automatically turned on to pump water.

[0009] As a preferred embodiment, a chain is provided at the bottom of the tank body, sprockets are connected at both ends of the chain, a drive shaft is fixed to the sprocket, the drive shaft is rotatably installed on the tank body, a drive motor is fixed to the rear end of the drive shaft at one end, and scrapers are evenly fixed on the outer wall of the chain. The bottom of the scraper is in contact with the bottom inner wall of the tank body, so that the sludge at the bottom of the tank body can be automatically scraped and gathered.

[0010] The utility model has the following beneficial effects:

[0011] The oil and water can be separated. The separated oil floating on the upper right side of the partition will overflow from the top of the partition to the left side of the partition for oil separation and collection. The water will be pumped out by a pump, cooled by a heat exchanger, and then passed into the spray tower for recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0013] Figure 2 for Figure 1 Schematic diagram of some structures;

[0014] In the figure: 1, liquid inlet pipe; 2, liquid level observation tube; 3, limit net; 4, water suction pipe; 5, water pump; 6, heat exchanger; 7, return pipe; 8, sprocket; 9, float; 10, drive shaft, 11, scraper, 12, chain, 13, mud collecting trough, 14, partition, 15, mud suction pipe, 16, mud pump, 17, oil pump, 18, oil suction pipe, 19, tank body, 20, exhaust pipe, 21, filter. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with embodiments.

[0016] Embodiment 1, as Figures 1 to 2 As shown, the utility model is an oil-water separation tank, comprising a tank body 19, a liquid inlet pipe 1 is fixed to the right end of the top of the tank body 19, a partition 14 is fixed to the bottom of the tank body 19, an overflow distance is provided between the top of the partition 14 and the top of the tank body 19, a mud collecting trough 13 is provided on the bottom of the tank body 19 on the right side of the partition 14, a mud extraction pipe 15 is provided at the bottom of the mud collecting trough 13, the mud extraction pipe 15 is connected to a mud extraction pump 16, a water extraction pipe 4 is fixed to the middle of the right end of the tank body 19, the water extraction pipe 4 is connected to a water extraction pump 5, the outlet of the water extraction pump 5 is connected to a reflux pipe 7, the reflux pipe 7 is connected to the spray water inlet pipe of the spray tower, the reflux pipe 7 is connected to the heat exchanger 6, an oil extraction pipe 18 is fixed to the bottom of the left end of the tank body 19, and the oil extraction pipe 18 is connected to the oil extraction pump 17.

[0017] During operation, the oil-water mixture with a small amount of mud flowing down from the spray tower enters the tank body 19 from the liquid inlet pipe 1, the mud and fixed impurities sink to the bottom, the water is in the middle, and the oil floats on the top. As the liquid level rises, when it reaches a certain position, the water pump 5 is started, and the water in the middle layer is extracted and circulated into the spray tower after heat exchange and cooling by the heat exchanger 6, forming an internal cycle. At this time, the amount of water entering the tank body 19 is close to being in a balanced state, and the oil will gradually increase with the amount of oil and gas processed by the spray tower. When the oil level exceeds the height of the top of the partition, it will overflow to the left for collection. After a period of time, the mud pump 16 can be turned on to extract the sludge.

[0018] Embodiment 2, based on embodiment 1, a filter 21 is provided on the water suction pipe 4.

[0019] An exhaust pipe 20 is provided on the left side of the top of the tank body 19 .

[0020] A transparent liquid level observation tube 2 is fixed at the lower middle part of the right end of the tank body 19 , a limiting net 3 is arranged inside the liquid level observation tube 2 , and a floating ball 9 is arranged above the limiting net 3 .

[0021] A contact switch is provided at the top of the liquid level observation tube 2, and the contact switch is connected to a controller, and the controller is connected to a water pump 5. After the oil-water mixture with a trace amount of mud flowing down from the spray tower enters the tank body 19 from the liquid inlet pipe 1, the float 9 will rise with the rise of the liquid. When the float 9 hits the contact switch, the water pump 5 will be turned on through the controller to perform water pumping circulation spraying.

[0022] A chain 12 is provided at the bottom of the tank 19, and sprockets 8 are connected at both ends of the chain 12. A drive shaft 10 is fixed to the sprocket 8. The drive shaft 10 is rotatably mounted on the tank 19. A drive motor is fixed to the rear end of the drive shaft 10 at one end. Scrapers 11 are evenly fixed on the outer wall of the chain 12, and the bottom of the scraper 11 contacts the bottom inner wall of the tank 19. Before the mud pump 16 pumps mud, the drive motor is started to drive the drive shaft 10 to rotate, thereby driving the scraper 11 on the chain 12 to rotate through the sprocket 8, and scraping the mud at the bottom of the tank 19 from right to left into the mud collecting tank 13, which is convenient for mud pumping.

[0023] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0024] In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

Claims

1. An oil-water separation tank, comprising a tank body (19), a liquid inlet pipe (1) being fixed to the top right end of the tank body (19), characterized in that: A partition (14) is fixed at the bottom of the tank body (19), an overflow gap is provided between the top of the partition (14) and the top of the tank body (19), a mud collecting trough (13) is provided at the bottom of the tank body (19) on the right side of the partition (14), a mud extraction pipe (15) is provided at the bottom of the mud collecting trough (13), the mud extraction pipe (15) is connected to a mud extraction pump (16), a water extraction pipe (4) is fixed at the middle of the right end of the tank body (19), the water extraction pipe (4) is connected to a water extraction pump (5), the outlet of the water extraction pump (5) is connected to a return pipe (7), the return pipe (7) is connected to a spray water inlet pipe of a spray tower, the return pipe (7) is connected to a heat exchanger (6), an oil extraction pipe (18) is fixed at the bottom of the left end of the tank body (19), the oil extraction pipe (18) is connected to the oil extraction pump (17).

2. The oil-water separation tank according to claim 1, characterized in that: A filter (21) is provided on the water pumping pipe (4).

3. The oil-water separation tank according to claim 1, characterized in that: An exhaust pipe (20) is provided on the left side of the top of the tank body (19).

4. The oil-water separation tank according to claim 1, characterized in that: A transparent liquid level observation tube (2) is fixed at the lower middle part of the right end of the tank body (19), a limiting net (3) is arranged inside the liquid level observation tube (2), and a floating ball (9) is arranged above the limiting net (3).

5. The oil-water separation tank according to claim 4, characterized in that: A contact switch is provided on the top of the liquid level observation tube (2), the contact switch is connected to a controller, and the controller is connected to a water pump (5).

6. The oil-water separation tank according to claim 1, characterized in that: A chain (12) is provided at the bottom of the tank body (19), sprocket wheels (8) are connected to both ends of the chain (12), a drive shaft (10) is fixed to the sprocket wheel (8), and the drive shaft (10) is rotatably mounted on the tank body (19), a drive motor is fixed to the rear end of the drive shaft (10) at one end, and a scraper (11) is evenly fixed on the outer side wall of the chain (12), and the bottom of the scraper (11) contacts the bottom inner wall of the tank body (19).

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