Oxygen exposure device and process for polymer sewage preparation

Abstract

The invention discloses an oxygen aeration device and process for polymer sewage preparation. The oxygen aeration device comprises an aeration disc (6) and an air supply system, the air supply system inputs air into the aeration disc (6), and the aeration disc (6) disperses and outputs the air into a dilution tank (5) for polymer sewage preparation; the oxygen aeration device dispersedly inflates air into a dilution tank (5) and stirs sewage in the dilution tank (5), so that the sewage is mixed with oxygen in air to remove reducing substances in the sewage; the problem that the viscosity of a polymer is lost due to the fact that reducing substances in sewage cannot be effectively removed due to the fact that the dissolved oxygen content of a water ejector oxygen aeration technology is low is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of oilfield surface engineering, and in particular to a polymer wastewater preparation process. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] For polymer flooding in tertiary oil recovery of oil fields, sewage is usually used to prepare diluted polymers, but the reducing substances in the sewage need to be removed to prevent the reducing substances from reducing the viscosity of the polymer solution, thereby causing viscosity loss and affecting the oil field development effect.

[0004] Therefore, the water ejector aeration technology is currently widely used, that is, a water ejector is installed on the process pipeline in front of the sewage tank to suck in air through negative pressure and mix it with water. Due to the small amount of air sucked in this process, the dissolved oxygen content in the water can only reach 0.5mg / L, and only the standard of 5mg / L can meet the requirements, so the water ejector aeration technology cannot meet the development requirements.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may contain information that does not constitute prior art. Summary of the invention

[0006] In view of this, the present disclosure provides an aeration device for preparing polymer wastewater to solve the problem that the dissolved oxygen content of the water ejector aeration technology is low, resulting in the inability to effectively remove the reducing substances in the wastewater, thereby causing the loss of polymer viscosity.

[0007] In addition, the present disclosure also provides an aeration process for preparing polymer wastewater.

[0008] In a first aspect, the aeration device for preparing polymer wastewater comprises: Aeration tray and air supply system; The air supply system inputs air to the aeration disk, and the aeration disk disperses and outputs the air into a dilution tank for preparing polymer wastewater.

[0009] In the present disclosure and possible embodiments, the gas supply system includes: A blower is connected to the aeration plate through a pipeline.

[0010] In the present disclosure and possible embodiments, the pipeline has an anti-backflow structure, and the anti-backflow structure is an inverted U-shaped pipe.

[0011] In the present disclosure and possible embodiments, a gas flow meter is connected to the pipeline.

[0012] In the present disclosure and possible embodiments, the dilution tank is connected to a liquid level meter.

[0013] In a second aspect, the aeration process for preparing polymer wastewater comprises: The aeration device described in any one of the first aspects is used to disperse air into the dilution tank and stir the sewage in the dilution tank, so that the sewage is mixed with oxygen in the air to remove reducing substances in the sewage.

[0014] In the present disclosure and possible embodiments, a gas flow meter is used to measure the air intake volume, a liquid level meter is used to measure the amount of sewage in the dilution tank, and the amount of dissolved oxygen in the sewage is determined by the air intake volume and the sewage volume.

[0015] In the present disclosure and possible embodiments, the intake air volume is adjusted according to the dissolved oxygen content.

[0016] The aeration device for preparing polymer wastewater disclosed in the present invention utilizes a combination of an air supply system and an aeration plate to disperse and fill air into the wastewater. Since the contact area between the aeration plate and the wastewater is large, the amount of air that can be input is large, which is beneficial to increasing the dissolved oxygen content in the wastewater. In addition, the air input through the air supply system and released through the aeration plate has a certain stirring effect on the wastewater, further enhancing the contact degree between oxygen in the air and the wastewater, thereby effectively increasing the oxygen content in the wastewater and reducing the content of reducing substances in the wastewater, providing a basic guarantee for increasing the viscosity retention rate of the polymer solution. The device of the present invention is used for the first time in the preparation process of polymer flooding wastewater, solving the problems of low dissolved oxygen content in water and low oxygen transfer efficiency in the traditional jet aeration process, and fundamentally ensuring the production needs of preparing diluted polymer wastewater in oilfield polymer flooding development. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of an aeration device for preparing polymer wastewater according to an embodiment of the present disclosure. Implementation

[0018] The present disclosure is described below based on embodiments, but it is worth noting that the present disclosure is not limited to these embodiments. In the detailed description of the present disclosure below, some specific details are described in detail. However, for the parts that are not described in detail, those skilled in the art can also fully understand the present disclosure.

[0019] In addition, those skilled in the art should understand that the drawings are only provided to illustrate the purpose, features and advantages of the present disclosure, and the drawings are not actually drawn to scale.

[0020] At the same time, unless the context clearly requires otherwise, the words "include", "comprises" and similar words throughout the specification and claims should be interpreted as inclusive rather than exclusive or exhaustive; that is, the meaning is "including but not limited to".

[0021] Figure 1 Schematic diagram of an aeration device for preparing polymer wastewater according to an embodiment of the present disclosure. Figure 1 As shown: the aeration device for preparing polymer wastewater includes an aeration plate 6 and an air supply system; wherein the air supply system inputs air to the aeration plate 6, and the aeration plate 6 disperses and outputs the air to the dilution tank 5 used for preparing polymer wastewater.

[0022] exist Figure 1 In the embodiment of the present disclosure, the air supply system includes a blower 1 , which is connected to an aeration plate 6 via a pipeline 3 .

[0023] exist Figure 1 In the embodiment of the present disclosure, the pipeline 3 is provided with an anti-backflow structure 4, and the anti-backflow structure 4 is an inverted U-shaped tube; the pipeline 3 is also connected to a gas flow meter 2.

[0024] exist Figure 1 In the embodiment of the present disclosure, the dilution tank 5 is connected to the liquid level meter 7.

[0025] The aeration process for preparing polymer wastewater according to the embodiment of the present disclosure is designed to utilize Figure 1 The aeration device shown disperses air into the dilution tank 5 and stirs the sewage in the dilution tank 5, so that the sewage is mixed with oxygen in the air to remove reducing substances in the sewage.

[0026] During the process implementation, the gas flow meter 2 is used to measure the air intake volume, and the liquid level meter 7 is used to measure the amount of sewage in the dilution tank 5. Obviously, the dissolved oxygen content in the sewage can be easily determined by the air intake volume and the sewage volume, and then the air intake volume is adjusted according to the dissolved oxygen content in the water until the dissolved oxygen content in the water reaches or exceeds the standard of 5 mg / L.

[0027] The specific implementation process of the oxygenation device and the oxygenation process of the present invention is described in detail below in conjunction with the accompanying drawings to further illustrate the technical effects of the present invention, as follows: When preparing polymer wastewater, the blower 1, the gas flow meter 2, the pipeline 3, the backflow prevention structure 4, the dilution tank 5, the aeration plate 6 and the liquid level meter 7 are connected; the blower 1 is started, the air intake is measured by the gas flow meter 2, the amount of wastewater in the dilution tank 5 is measured by the liquid level meter 7, and the amount of dissolved oxygen in the water is calculated by the air intake and the amount of wastewater; after the air enters the dilution tank 5, it is released through the aeration plate 6 and mixed with the wastewater in the dilution tank 5, and the oxygen in the air enters the wastewater to remove the reducing substances in the wastewater.

[0028] When the dissolved oxygen content in the sewage does not meet the standard requirements, the air delivery of the blower 1 is increased, thereby increasing the amount of air entering the dilution tank 5 until it meets the standard requirements.

[0029] In summary, the aeration device of the present invention utilizes a blower 1, a gas flow meter 2, an aeration plate 6, and a liquid level meter 7 to implement an aeration process for the preparation of polymer wastewater, wherein the aeration plate 6 is a key component of the present invention, and the air input by the blower 1 is cut into tiny bubbles by the aeration plate 6 to increase the contact area with the sewage in the dilution tank 5, thereby improving the oxygen conduction efficiency. At the same time, the aeration plate 6 has a large contact area with the sewage, and the amount of air that can be input is large. Moreover, the air input by the blower 1 and released through the aeration plate 6 has a certain stirring effect on the sewage, further enhancing the contact degree between the oxygen in the air and the sewage, thereby effectively increasing the oxygen content in the sewage, reducing the content of reducing substances in the sewage, and providing a basic guarantee for improving the viscosity retention rate of the polymer solution; therefore, the present disclosure realizes the control of the dissolved oxygen content through the blower 1 and the flow meter 2, so that the dissolved oxygen content meets the standard requirements, solves the problems of low dissolved oxygen content and low oxygen transfer efficiency in the traditional jet aeration process, thereby ensuring the dissolved oxygen content required for the preparation of oilfield polymer wastewater.

[0030] The above-described embodiments are only embodiments of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the present disclosure. It should be noted that, for a person of ordinary skill in the art, without departing from the concept of the present disclosure, several variations, equivalent substitutions, improvements, etc. may be made, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure shall be subject to the attached claims.

Claims

1. An aeration device for preparing polymer wastewater, characterized in that: include: Aeration plate (6) and air supply system; The air supply system inputs air to the aeration plate (6), and the aeration plate (6) disperses and outputs the air into a dilution tank (5) for preparing polymer wastewater.

2. The aeration device for preparing polymer wastewater according to claim 1, characterized in that: The gas supply system comprises: A blower (1), wherein the blower (1) is connected to the aeration plate (6) via a pipeline (3).

3. The aeration device for preparing polymer wastewater according to claim 2, characterized in that: The pipeline (3) is provided with an anti-backflow structure (4), and the anti-backflow structure (4) is an inverted U-shaped tube.

4. The aeration device for preparing polymer wastewater according to claim 3, characterized in that: The pipeline (3) is connected to a gas flow meter (2).

5. The aeration device for preparing polymer wastewater according to claim 4, characterized in that: The dilution tank (5) is connected to a liquid level meter (7).

6. An aeration process for preparing polymer wastewater, characterized in that: include: The aeration device according to any one of claims 1 to 5 is used to disperse air into the dilution tank (5) and stir the sewage in the dilution tank (5), so that the sewage is mixed with oxygen in the air to remove reducing substances in the sewage.

7. The aeration process for preparing polymer wastewater according to claim 6, characterized in that: The gas flow meter (2) is used to measure the air intake volume, the liquid level meter (7) is used to measure the amount of sewage in the dilution tank (5), and the amount of dissolved oxygen in the sewage is determined based on the air intake volume and the amount of sewage.

8. The aeration process for preparing polymer wastewater according to claim 7, characterized in that: The air intake volume is adjusted according to the dissolved oxygen content.

Images