CN205709989U - A kind of oilfield sewage oil removal sand removal sedimenting system - Google Patents

Abstract

The utility model discloses a settling system for removing oil and sand from oilfield sewage, which comprises a water unloading tank, a settling tank, an oil-separating grit chamber and a water-cleaning tank connected in sequence, and the bottom of the oil-separating grit chamber is connected with a mud collection tank. A sludge lifting pump a is installed in the sludge collection tank, and the sludge lifting pump a is connected to the outside of the oil-separating grit chamber through a pipeline. The inner wall of the grit chamber is connected with an oil collection pipeline, and the oil collection pipeline is connected with the oil collection tank outside the oil separation grit chamber, and the bottom of the clean water collection tank is provided with a sewage lifting pump b and a liquid level alarm. An oilfield sewage degreasing and desanding settlement system realizes the cleaning of sewage oil, mud and sand while prolonging the sewage settling time, has a good effect of degreasing and degreasing, improves the function of degreasing and desanding, and ensures that the water quality after treatment reaches the standard.

Description

A settling system for oil field sewage degreasing and desanding

technical field

The utility model belongs to the technical field of oilfield sewage treatment, in particular to a settling system for oilfield sewage removal of oil and sand.

Background technique

The existing sewage produced in the oil field relies on three-stage settling tanks to remove oil and sedimentation to remove sand. After settlement, the sewage is filtered by water treatment equipment and injected into the oil layer. Sewage enters the first-level tank without time to settle and remove oil, and directly enters the second-level or even third-level settling tank through inclined holes. The settling time is short, and the effect of settling and degreasing is poor. After a large amount of oily sewage enters the water treatment equipment, sludge and emulsified oil will be enriched On the surface of the fine filter device (fiber ball or sintered tube), the fine filter equipment will be damaged, causing serious economic losses.

Utility model content

The purpose of the utility model is to provide a settling system for oil field sewage degreasing and sand removal, which solves the problem of poor effect of settling and degreasing in the existing oil field sewage treatment.

The technical solution adopted by the utility model is an oil field sewage degreasing and sand settlement system, which includes a discharge tank, a settling tank, an oil separation grit chamber and a water purification collection tank connected in sequence, and the bottom of the oil separation grit chamber is connected There is a sludge collection tank, and a sludge lifting pump a is installed in the sludge collecting tank, and the sludge lifting pump a is connected to the outside of the oil separation grit chamber through a pipeline, and an overflow weir and a height-adjustable baffle are set at the outlet of the oil separation The oil plate and the inner wall of the oil-separating grit chamber are connected with an oil-receiving pipeline, and the oil-receiving pipeline is connected with the oil-collecting tank outside the oil-separating grit chamber. The bottom of the clean water collecting tank is provided with a sewage lifting pump b and a liquid level alarm.

The utility model is also characterized in that,

The connection between the oil separation grit chamber and the clean water collection pond is close to the overflow weir.

Both the oil baffle and the overflow weir are close to the top of the oil separation grit chamber.

The oil recovery line is near the top of the oil separation grit chamber.

The bottom of the oil separation grit chamber is an inclined plane, and the mud collection tank is located at the low point of the bottom of the oil separation grit chamber.

The oil collection pipeline is connected with the inner wall of the oil separation grit chamber through brackets and pipe clamps.

The beneficial effects of the utility model are: an oil field sewage degreasing and sand settling system is provided with an oil separation grit chamber, the bottom of the oil separation grit chamber is an inclined plane, and under the action of gravity, the mud and sand are deposited along the inclined plane in the mud collection tank at the low point of the slope , the sludge lifting pump a in the sludge collection tank regularly cleans the mud and sand and is pulled by the tanker to the nearby joint station for processing. An overflow weir and a height-adjustable oil baffle are installed at the outlet of the oil separation grit chamber, and the oil baffle blocks the rear sewage. The oil floats up and enters the oil collection tank through the oil collection pipeline to realize the cleaning of sludge and sand while prolonging the sewage settling time. The effect of sedimentation and degreasing is good, the function of degreasing and sand setting is improved, and the water quality after treatment is guaranteed to meet the standard.

Description of drawings

Fig. 1 is a structural schematic diagram of an oil field sewage degreasing and desanding settlement system of the utility model.

In the figure, 1. Unloading tank, 2. Settling tank, 3. Oil separation grit chamber, 4. Clean water collection tank, 5. Inclined surface, 6. Silt collection tank, 7. Sludge lifting pump a, 8. Support, 9. Oil baffle, 10. Overflow weir, 11. Sewage lift pump b, 12. Liquid level alarm, 13. Oil collection pipeline, 14. Oil collection tank.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The utility model provides a settling system for degreasing and desanding of oil field sewage, as shown in Figure 1, comprising a water discharge tank 1, a settling tank 2, an oil separation and grit settling tank 3, a clean water collection tank 4, and a settling tank 2 connected in sequence It is connected with the oblique hole in the middle of the oil-separating grit chamber 3, and the bottom of the oil-separating grit chamber 3 is connected with a sludge collection tank 6, and a sludge lifting pump a7 is arranged in the sludge collecting tank 6, and the sludge lifting pump a7 is connected to the Outside the oil-separating grit chamber 3, an overflow weir 10 and a height-adjustable oil baffle 9 are arranged at the outlet of the oil-separating grit chamber 3. The inner wall of the oil-separating grit chamber 3 is connected with an oil collection pipeline 13, and the oil collection pipeline 13 is connected to the oil collecting tank 14 on the outside of the oil separation grit chamber 3, and the bottom of the water purification collecting tank 4 is provided with a sewage lifting pump b11 and a liquid level alarm 12;

The junction of the oil separation grit chamber 3 and the clean water collection tank 4 is close to the overflow weir 10;

Both the oil baffle plate 9 and the overflow weir 10 are close to the top of the oil separation grit chamber 3;

The oil collection pipeline 13 is close to the top of the oil separation grit chamber 3;

The bottom of the oil separation grit chamber 3 is a slope 5, and the mud collection tank 6 is located at the low point at the bottom of the oil separation grit chamber 3;

The oil collection pipeline 13 is connected with the inner wall of the oil separation grit chamber 3 through the bracket 8 and the pipe clamp.

The working principle of the oilfield sewage degreasing and sand removal settlement system of the utility model is: the oilfield sewage first enters the unloading pool 1, and the unloading pool 1 is used to buffer the impact force of the incoming water, and then passes through the settling pool 2 and waits for the water flow to stabilize from the middle oblique hole. It flows into the oil separation grit chamber 3. The bottom of the oil separation grit chamber 3 is a slope 5. Under the action of gravity, the mud and sand deposits along the slope 5 in the sludge collection tank 6 at the low point of the slope. The sludge lifting pump a7 in the sludge collection tank 6 Regularly clean the mud and sand by tank trucks to the nearby joint station for processing. An overflow weir 10 and a height-adjustable oil baffle 9 are installed at the outlet of the oil separation grit chamber 3. The pipeline 13 enters the oil collection tank 14, and is regularly cleaned by a sewage truck. The settled sewage enters the water purification collection tank 4 through the overflow weir 10. The bottom of the water purification collection tank 4 is equipped with a sewage lifting pump b11 and a liquid level alarm 12 , control the sewage lifting pump b11 to realize automatic start and stop, the sewage lifting pump b11 also plays the role of sludge cleaning, and the liquid level alarm device 12 sends out an alarm when the liquid level is high or low.

The oil and sand removal system for oil field sewage of the utility model is provided with an oil separation grit chamber 3, and the bottom of the oil separation grit chamber 3 is a slope 5, and the mud and sand are deposited along the slope 5 under the action of gravity in the mud collection pond at the low point of the slope 6, the sludge lifting pump a7 in the sludge collection tank 6 regularly cleans the mud and sand from the tank truck to the nearby joint station for processing, and the outlet of the oil separation grit chamber 3 is provided with an overflow weir 10 and a height-adjustable oil baffle 9 After being blocked by the oil baffle plate 9, the dirty oil floats up, and enters the oil collection tank 14 through the oil collection pipeline 13, so as to realize the cleaning of the dirty oil, mud and sand while prolonging the sewage settling time. After treatment, the water quality reaches the standard.

Claims (6)

1. an oil field sewage degreasing and desanding settlement system, is characterized in that: comprise unloading pond (1), settling pond (2), oil separation grit chamber (3) and clean water collection pond (4) connected successively, A sludge collection tank (6) is arranged at the bottom of the oil separation grit chamber (3), and a sludge lifting pump a (7) is connected in the sludge collecting tank (6), and the sludge lifting pump a (7) is connected to the isolation tank through a pipeline. Outside the oil grit chamber (3), an overflow weir (10) and a height-adjustable oil baffle (9) are arranged at the outlet of the oil-isolated grit chamber (3), and the inner wall of the oil-isolated grit chamber (3) is connected to There is an oil collection pipeline (13), and the oil collection pipeline (13) is connected to the oil collection tank (14) outside the oil separation grit chamber (3), and the bottom of the clean water collection tank (4) is provided with a sewage lifting pump b (11 ) and liquid level alarm (12). 2. A kind of oilfield sewage degreasing and desanding settlement system according to claim 1, characterized in that: the junction of the oil separation grit chamber (3) and the clean water collection tank (4) is close to the overflow weir ( 10). 3. A settling system for oilfield sewage degreasing and desanding according to claim 1, characterized in that: the oil baffle (9) and the overflow weir (10) are close to the top of the oil separation grit chamber (3) . 4. A settling system for oilfield sewage degreasing and desanding according to claim 1, characterized in that: the oil collection pipeline (13) is close to the top of the oil separation grit chamber (3). 5. A kind of oilfield sewage degreasing and desanding settlement system according to any one of claims 1-4, characterized in that: the bottom of the oil-separating grit chamber (3) is an inclined plane (5), and the sludge collection tank (6) It is located at the low point at the bottom of the oil separation grit chamber (3). 6. A settling system for oilfield sewage degreasing and desanding according to any one of claims 1-4, characterized in that: the oil collection pipeline (13) passes through the bracket (8) and the pipe clamp and the oil separation and sand settling system The inner wall of the pool (3) is connected.