Sewage treatment device for marine drilling platform

Abstract

A sewage treatment device for a marine drilling platform relates to the technical field of sewage treatment and comprises a settling tank body, an oil storage chamber is arranged at the top of the settling tank body, a weir plate through hole is formed in an oil weir plate on the inner side of the oil storage chamber, the oil storage chamber is communicated with the settling tank body through the weir plate through hole, and an oil taking pipe is arranged at the bottom of the oil storage chamber. The oil taking pipe penetrates through the settling tank body and extends to the bottom of the settling tank body, a sludge tank is arranged at the bottom of the settling tank body, a sludge pump is mounted on the sludge tank, a partition plate is arranged in the settling tank body and divides an inner cavity of the settling tank body into a left cavity and a right cavity, the upper end of the left cavity is communicated with the upper end of the right cavity, and the lower end of the right cavity is communicated with the upper end of the oil taking pipe. According to the settling tank disclosed by the utility model, the two chambers are arranged, so that the treatment efficiency is improved, and a plurality of settling tanks are connected in series for use, so that a multi-stage purification effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment device for an offshore drilling platform. Background Art

[0002] As humans develop and utilize oil and gas resources, oil and gas exploration and development have shifted from land to the ocean. Therefore, drilling operations must also be carried out in the vast ocean. When drilling oil at sea, the drilling rig weighing hundreds of tons must have enough support and placement space, and there must also be a place for the drilling personnel to live. The offshore oil drilling platform takes on this important task.

[0003] As the environmental situation becomes increasingly severe, the country attaches more and more importance to ecological environmental protection, especially marine environmental protection. Various offshore oil fields have successively proposed to gradually achieve "zero emissions" of industrial wastewater, domestic sewage and marine solid waste. However, the sewage treatment devices used in existing offshore drilling platforms still have the problem of incomplete treatment. The discharge of unclean sewage into the ocean will cause marine pollution, which will eventually harm the economic life and physical health of local people. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a sewage treatment device for an offshore drilling platform, which can solve the technical problem of incomplete sewage treatment in the prior art on offshore drilling platforms.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A sewage treatment device for an offshore drilling platform comprises a settling tank body, an oil storage chamber is arranged on the top of the settling tank body, a weir plate through hole is opened on the oil weir plate inside the oil storage chamber, the oil storage chamber is connected with the settling tank body through the weir plate through hole, an oil extraction pipe is arranged at the bottom of the oil storage chamber, the oil extraction pipe passes through the settling tank body and extends to the bottom of the settling tank body, a sludge tank is arranged at the bottom of the settling tank body, and a sludge pump is installed on the sludge tank;

[0007] A partition is provided in the sedimentation tank body, and the partition divides the inner cavity of the sedimentation tank body into a left chamber and a right chamber. The upper ends of the left chamber and the right chamber are connected, and the left chamber and the right chamber are both provided with a liquid inlet pipe and a liquid outlet pipe, and a stirrer is provided on the top of the left chamber and the right chamber.

[0008] Preferably, the liquid inlet pipe includes a vertical liquid inlet pipe and a horizontal liquid inlet pipe, the vertical liquid inlet pipe is connected to the horizontal liquid inlet pipe, and a plurality of liquid distribution holes are opened on the rear end tube body of the horizontal liquid inlet pipe; the number of the liquid outlet pipes is two, the two liquid outlet pipes are arranged in parallel up and down, and a plurality of liquid outlet holes are opened on both the liquid outlet pipes.

[0009] Preferably, magnetic flap level gauges are provided at the upper and lower ends of the sedimentation tank body.

[0010] Preferably, manholes are provided on one side of the lower end and on the top of the sedimentation tank body.

[0011] Preferably, a plurality of sampling ports are provided on the backs of the left chamber and the right chamber.

[0012] Preferably, the tops of the left chamber and the right chamber are both provided with drug adding ports.

[0013] Preferably, an air inlet and an air outlet are provided on the top of the oil storage chamber, and a high-position float liquid level gauge, a low-position float liquid level gauge and a pressure transmitter are also provided on the oil storage chamber.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the settling tank of the utility model is provided with two chambers, which is conducive to improving the processing efficiency, and multiple settling tanks are used in series to play a multi-stage purification role. During the treatment, the sewage enters the chamber through the liquid inlet pipe, and the chemical agent for separating the sewage is added into the chamber through the dosing port, and then the chemical agent is stirred by the agitator so that the agent and the sewage are fully mixed. After a period of gravity sedimentation and separation, the crude oil floats on the water surface and enters the oil storage chamber through the weir plate through the through hole, the water is discharged through the liquid outlet pipe, and the sludge enters the sludge tank and is pumped away by the sludge pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is a front view of the utility model;

[0018] Figure 3 It is a left view of the utility model;

[0019] Figure 4 It is a rear view of the utility model;

[0020] Figure 5 It is a top view of the utility model;

[0021] Figure 6 for Figure 2 A cross-sectional view of

[0022] Figure 7This is a structural diagram of the oil weir plate of the oil storage chamber of the utility model.

[0023] Description of reference numerals:

[0024] 1-sedimentation tank body, 2-oil storage chamber, 3-oil weir plate, 4-weir plate through hole, 5-oil extraction pipe, 6-sludge tank, 7-sludge pump, 8-partition, 9-left chamber, 10-right chamber, 11-liquid inlet pipe, 111-vertical liquid inlet pipe, 112-horizontal liquid inlet pipe, 12-liquid outlet pipe, 13-agitator, 14-magnetic flap level gauge, 15-manhole, 16-sampling port, 17-dosing port, 18-air inlet, 19-air outlet, 20-high-level float level gauge, 21-low-level float level gauge, 22-pressure transmitter. DETAILED DESCRIPTION

[0025] The following is a detailed description of the invention of the utility model by way of examples in conjunction with the accompanying drawings of the specification. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments.

[0026] like Figures 1 to 7 As shown, the utility model provides a sewage treatment device for an offshore drilling platform, including a sedimentation tank body 1, an oil storage chamber 2 is provided on the top of the sedimentation tank body 1, a weir plate through hole 4 is opened on the oil weir plate 3 inside the oil storage chamber 2, the oil storage chamber 2 is connected with the sedimentation tank body 1 through the weir plate through hole 4, an oil extraction pipe 5 is provided at the bottom of the oil storage chamber 2, the oil extraction pipe 5 passes through the sedimentation tank body 1 and extends to the bottom of the sedimentation tank body 1, a sludge tank 6 is provided at the bottom of the sedimentation tank body 1, and a sludge pump 7 is installed on the sludge tank 6.

[0027] A partition 8 is provided in the sedimentation tank body 1, and the partition 8 divides the inner cavity of the sedimentation tank body 1 into a left chamber 9 and a right chamber 10. The upper ends of the left chamber 9 and the right chamber 10 are connected. A liquid inlet pipe 11 and a liquid outlet pipe 12 are provided in the left chamber 9 and the right chamber 10. A stirrer 13 is provided on the top of the left chamber 9 and the right chamber 10. The stirrer 13 is provided to facilitate sufficient stirring and mixing of the liquid in the chamber, thereby improving the reaction rate of sewage and chemical agents, thereby improving the treatment efficiency.

[0028] The liquid inlet pipe 11 includes a vertical liquid inlet pipe 111 and a horizontal liquid inlet pipe 112. The vertical liquid inlet pipe 111 is connected to the horizontal liquid inlet pipe 112, and a plurality of liquid distribution holes are provided on the rear end tube body of the horizontal liquid inlet pipe 112. By setting a multi-structure liquid inlet pipe 11, it is convenient to connect to the manifolds at different positions to facilitate liquid inlet, and the diameters of the liquid inlet pipes 11 in the two chambers can be the same or different, depending on the actual situation on site; the number of the liquid outlet pipes 12 is two, and the two liquid outlet pipes 12 are arranged in parallel up and down, and a plurality of liquid outlet holes are provided on the two liquid outlet pipes 12. By setting two liquid outlet pipes 12, on the one hand, the liquid outlet volume is expanded, and on the other hand, when the sedimentation tank body 1 is cleaned, the upper end liquid outlet pipe 12 introduces external pure water into the tank body, and sprays it through the liquid outlet hole to flush the inner wall of the tank body, and the sewage after flushing enters the lower end liquid outlet pipe 12 through the liquid outlet hole on the lower end liquid outlet pipe 12 and is discharged through the lower end liquid outlet pipe 12.

[0029] The upper and lower ends of the sedimentation tank body 1 are both provided with magnetic flap level gauges 14 for monitoring the liquid level in the tank.

[0030] The lower end side and the top of the sedimentation tank body 1 are both provided with manholes 15 for convenient observation of the conditions in the left chamber 9 and the right chamber 10 .

[0031] The back of the left chamber 9 and the right chamber 10 are provided with a plurality of sampling ports 16 at different heights, which are convenient for sampling liquids at different liquid levels in the chambers and confirming the liquid level division and treatment effect through chemical analysis.

[0032] The tops of the left chamber 9 and the right chamber 10 are both provided with drug adding ports 17 for adding chemical reagents.

[0033] The top of the oil storage chamber 2 is provided with an air inlet 18 and an air outlet 19. Nitrogen is introduced into the oil storage chamber 2 through the air inlet 18. The nitrogen can flush out the flammable and explosive gas in the oil storage chamber 2 through the air outlet 19, thereby avoiding the risk of explosion of the oil storage chamber 2. The oil storage chamber 2 is also provided with a high-level float liquid level gauge 20, a low-level float liquid level gauge 21 and a pressure transmitter 22, which are used to monitor the liquid level and pressure of the oil storage chamber 2 respectively.

[0034] Working principle: During treatment, sewage enters the chamber through the liquid inlet pipe 11, and chemical agents for separating sewage are added into the chamber through the dosing port 17, and then stirred by the agitator 13 so that the agents and sewage are fully mixed. After a period of gravity sedimentation and separation, the crude oil floats on the water surface and enters the oil storage chamber 2 through the weir plate through hole 4. The water is discharged through the liquid outlet pipe 12, and the sludge enters the sludge tank 6 and is pumped away by the sludge pump 7.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and application concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sewage treatment device for an offshore drilling platform, comprising a sedimentation tank body (1), characterized in that: An oil storage chamber (2) is provided at the top of the sedimentation tank body (1), a weir plate through hole (4) is provided on the oil weir plate (3) inside the oil storage chamber (2), the oil storage chamber (2) is connected with the sedimentation tank body (1) through the weir plate through hole (4), an oil extraction pipe (5) is provided at the bottom of the oil storage chamber (2), the oil extraction pipe (5) passes through the sedimentation tank body (1) and extends to the bottom of the sedimentation tank body (1), a sludge tank (6) is provided at the bottom of the sedimentation tank body (1), and a sludge pump (7) is installed on the sludge tank (6); A partition (8) is provided inside the sedimentation tank body (1), and the partition (8) divides the inner cavity of the sedimentation tank body (1) into a left chamber (9) and a right chamber (10). The upper ends of the left chamber (9) and the right chamber (10) are connected, and a liquid inlet pipe (11) and a liquid outlet pipe (12) are provided inside the left chamber (9) and the right chamber (10). A stirrer (13) is provided at the top of the left chamber (9) and the right chamber (10).

2. A sewage treatment device for an offshore drilling platform as claimed in claim 1, characterized in that: The liquid inlet pipe (11) comprises a vertical liquid inlet pipe (111) and a horizontal liquid inlet pipe (112); the vertical liquid inlet pipe (111) is connected to the horizontal liquid inlet pipe (112), and a plurality of liquid distribution holes are provided on the rear end tube body of the horizontal liquid inlet pipe (112); the number of the liquid outlet pipes (12) is two, the two liquid outlet pipes (12) are arranged in parallel up and down, and the two liquid outlet pipes (12) are provided with a plurality of liquid outlet holes.

3. A sewage treatment device for an offshore drilling platform as claimed in claim 1, characterized in that: The upper end and the lower end of the sedimentation tank body (1) are both provided with magnetic flap level gauges (14).

4. A sewage treatment device for an offshore drilling platform as claimed in claim 1, characterized in that: A manhole (15) is provided on one side of the lower end and on the top of the sedimentation tank body (1).

5. A sewage treatment device for an offshore drilling platform as claimed in claim 1, characterized in that: A plurality of sampling ports (16) are provided on the backs of the left chamber (9) and the right chamber (10).

6. A sewage treatment device for an offshore drilling platform as claimed in claim 1, characterized in that: The tops of the left chamber (9) and the right chamber (10) are both provided with drug adding ports (17).

7. A sewage treatment device for an offshore drilling platform as claimed in claim 1, characterized in that: An air inlet (18) and an air outlet (19) are provided at the top of the oil storage chamber (2). A high-position float liquid level gauge (20), a low-position float liquid level gauge (21) and a pressure transmitter (22) are also provided on the oil storage chamber (2).

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