A real-time water quality measuring device for produced water purification water tank

Abstract

The utility model relates to a kind of water quality real-time measuring device of produced water purification water tank, including liquid level measuring device and sludge level measuring device in purification water tank;Its characterized in that, water quality on-line monitoring sensor for realizing longitudinal height adjustment is also equipped in the purification water tank, water quality on-line monitoring sensor is located below liquid level in purification water tank, above the intermediate position of sludge layer;It further includes a monitoring system, and the monitoring system is electrically connected with liquid level measuring device, sludge level measuring device and water quality on-line monitoring sensor.The utility model ensures that water quality on-line monitoring sensor is always located below liquid level in purification water tank, above the intermediate position of sludge layer;So that water quality on-line monitoring sensor realizes to water quality continuity monitoring, rapidly identifies and early warning water quality anomaly, provides the basis for operator to provide timely intervention, ensures that water quality is always in safe, compliant state, lays solid foundation for the efficient, sustainable exploitation of oilfield.

Description

Technical Field

[0001] This utility model relates to the field of oilfield produced water quality monitoring technology, and in particular to a real-time water quality measuring device for a produced water purification tank. Background Technology

[0002] As a key component of the oilfield water treatment system, the purified water tank is responsible for storing deeply treated purified water. This purified water must meet stringent reinjection standards before it can be safely and efficiently injected into injection wells via injection pumps and a sophisticated pipeline system. This process plays an indispensable role in enhancing reservoir drive capabilities and improving oil recovery rates. Therefore, ensuring continuous monitoring and strict management of the water quality within the purified water tank is crucial for guaranteeing the efficient and stable operation of oilfield production.

[0003] Currently, the commonly used water quality monitoring methods mainly rely on setting up outlets in the tank, taking samples, and sending them to the laboratory for chemical analysis. While this method can reflect water quality to some extent, it has significant limitations. First, the randomness of manual sampling and the lag in laboratory analysis may lead to insufficient data accuracy and difficulty in reflecting water quality fluctuations in real time. Second, the non-fixed monitoring frequency makes it difficult to detect and address potential water quality problems in a timely manner, posing a hidden danger to production safety. Therefore, seeking more efficient and real-time water quality monitoring methods is particularly urgent. Of particular concern is that if key indicators such as suspended solids content, pH value, and dissolved oxygen in the purified water exceed the specified range, it may not only accelerate the corrosion of tank and pipeline materials and shorten equipment lifespan, but also cause formation blockage, seriously affecting water injection efficiency and crude oil extraction results. In view of this, a real-time water quality measurement device for produced water purification tanks is proposed. Summary of the Invention

[0004] To overcome the above shortcomings, this utility model provides a real-time water quality measurement device for produced water purification tanks, aiming to improve the problems of data accuracy and result lag in existing water quality monitoring technologies.

[0005] The technical solution of this utility model is as follows:

[0006] A real-time water quality measuring device for a purified water tank includes a liquid level measuring device and a sludge level measuring device located inside the purified water tank; the purified water tank is also equipped with an online water quality monitoring sensor that enables vertical height adjustment, the online water quality monitoring sensor being located at the middle position below the liquid level and above the sludge layer inside the purified water tank; it also includes a monitoring system, the monitoring system being electrically connected to the liquid level measuring device, the sludge level measuring device and the online water quality monitoring sensor.

[0007] A fixed frame is provided in the longitudinal direction inside the purified water tank, and the bottom end of the fixed frame is connected to the bottom of the purified water tank; a fixed plate is slidably arranged on the fixed frame, and the online water quality monitoring sensor is located on the fixed plate.

[0008] It also includes a push rod, which is arranged parallel to the fixed frame. The fixed plate is connected to the fixed frame in an "L" shape, and the fixed plate is slidably connected to the fixed frame through the push rod.

[0009] The online water quality monitoring sensors include, but are not limited to, pH sensors, dissolved oxygen sensors, oil content sensors, and suspended solids sensors.

[0010] The monitoring system includes an IoT data box and a computer located outside the purified water tank, and also includes a power supply device connected to the IoT data box; the power supply device is a solar panel located outside the purified water tank; the solar panel is also connected to a liquid level measuring device, a mud level measuring device, and an online water quality monitoring sensor.

[0011] The push rod is an electric push rod, which is electrically connected to the computer via a motor, and is also electrically connected to the solar panel.

[0012] The liquid level measuring device is a liquid level gauge, and the mud level measuring device is a mud level gauge; the liquid level gauge and the mud level gauge are installed in parallel inside the purified water tank and the measuring ends of both extend into the interior of the purified water tank, and the other ends of both are connected to the Internet of Things data box; the liquid level gauge and the mud level gauge are also connected to the solar panel respectively.

[0013] The online water quality monitoring sensor is located in the middle position, 50cm below the liquid level and 100cm above the sludge layer inside the purified water tank.

[0014] Both the liquid level gauge and the mud level gauge are connected to the IoT data box via waterproof cables.

[0015] The technical advantages of this utility model are as follows:

[0016] After pretreatment and advanced treatment, produced water from the oilfield flows into a purification tank for storage. Over time, this sedimentation process in the tank gradually accumulates a certain thickness of sludge. Data from the liquid level and sludge level measuring devices is transmitted to the monitoring system. The system identifies the thickness of the sludge layer and the liquid level within the purification tank, and then adjusts the height of the online water quality monitoring sensor within the tank. This ensures that the sensor is always positioned between the liquid level and the sludge layer, allowing for continuous water quality monitoring, rapid identification and early warning of anomalies, and providing operators with timely intervention information. This ensures that the water quality remains safe and compliant, laying a solid foundation for the efficient and sustainable development of the oilfield.

[0017] On the other hand, the water quality online monitoring sensor is far away from the sludge layer, which can prevent the sludge from contaminating the water quality online monitoring sensor. At the same time, it can effectively avoid secondary pollution caused by pollutants released by the sludge to the water to be reinjected into the purified water tank. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the real-time water quality measurement device for the purified water tank of this utility model.

[0019] Reference numerals: 1. Mud level gauge; 2. Liquid level gauge; 3. Online water quality monitoring sensor; 4. Mounting frame; 5. Mounting plate; 6. Electric actuator; 7. Solar panel; 8. Internet of Things data box; 9. Computer; 10. Motor. Detailed Implementation

[0020] Example 1

[0021] A real-time water quality measuring device for a purified water tank includes a liquid level measuring device and a sludge level measuring device located inside the purified water tank; the purified water tank is also equipped with an online water quality monitoring sensor 3 that enables vertical height adjustment, the online water quality monitoring sensor 3 being located at the middle position below the liquid level and above the sludge layer inside the purified water tank; it also includes a monitoring system, the monitoring system being electrically connected to the liquid level measuring device, the sludge level measuring device and the online water quality monitoring sensor 3.

[0022] The specific implementation process of this embodiment is as follows:

[0023] After pretreatment and advanced treatment, produced water from the oilfield flows into a purification tank for storage. Over time, further sedimentation within the tank gradually accumulates a certain thickness of sludge. Data from the liquid level and sludge level measuring devices is transmitted to the monitoring system. The system identifies the thickness of the sludge layer and the liquid level within the purification tank, and then adjusts the height of the online water quality monitoring sensor 3 within the tank. This ensures that the sensor 3 is always positioned in the middle, below the liquid surface and above the sludge layer, preventing sludge contamination. Simultaneously, the online water quality monitoring sensor 3 provides continuous water quality monitoring, quickly identifying and issuing warnings of water quality anomalies. This provides operators with a basis for timely intervention, ensuring that the water quality remains safe and compliant, laying a solid foundation for the efficient and sustainable development of the oilfield. Generally, the online water quality monitoring sensor 3 is positioned in the middle, 50cm below the liquid surface and 100cm above the sludge layer in the purification tank.

[0024] Example 2

[0025] Based on Embodiment 1, the method further includes: a fixed frame 4 is provided longitudinally inside the purified water tank, the bottom end of the fixed frame 4 is connected to the bottom of the purified water tank, and it has a certain degree of corrosion resistance and load-bearing capacity; a fixed plate 5 is slidably arranged on the fixed frame, and the online water quality monitoring sensor 3 is located on the fixed plate 5. A push rod is also included, which is arranged parallel to the fixed frame 4. The fixed plate 5 is connected to the fixed frame 4 in an "L" shape, and the fixed plate 5 is slidably connected to the fixed frame 4 through the push rod. Its adjustment range is 0-3m, adjusting the immersion depth of the online water quality monitoring sensor 3 according to the liquid level and sludge layer thickness to avoid dry burning or excessive soaking of the online water quality monitoring sensor 3; the fixed plate 5 is a corrosion-resistant fixed plate 5.

[0026] Example 3

[0027] Based on Example 2, the system further includes: the online water quality monitoring sensor 3 includes, but is not limited to, a pH sensor (measurement range 0-14), a dissolved oxygen sensor (measurement range 0-20 mg / L), an oil content sensor (measurement range 0-500 mg / L), and a suspended solids sensor (measurement range 0-500 mg / L), which are used to measure various water quality indicators in the purified water tank.

[0028] Example 4

[0029] Based on Example 3, it also includes:

[0030] The monitoring system includes an IoT data box 8 and a computer 9 located outside the purified water tank, and a power supply device connected to the IoT data box 8. The power supply device is a solar panel 7 located outside the purified water tank. The solar panel 7 is installed on the top of the purified water tank or in a nearby light-receiving area, with a conversion efficiency ≥20% to maximize the reception of solar radiation and its conversion into electrical energy. The solar panel 7 is also waterproof and heat-resistant, allowing it to adapt to the special needs of water treatment plants in remote mountainous areas, ensuring the long-term normal operation of the device. The solar panel 7 is also connected to a liquid level measuring device, a sludge level measuring device, and an online water quality monitoring sensor 3. The computer 9 provides real-time data visualization, historical query, and remote equipment control functions.

[0031] Example 5

[0032] Based on Embodiment 4, the following is also included: the push rod is an electric push rod 6, the electric push rod 6 is electrically connected to the computer 9 through a motor 10, and the electric push rod 6 is also electrically connected to the solar panel 7.

[0033] The liquid level measuring device is a liquid level gauge 2, and the mud level measuring device is a mud level gauge 1; the liquid level gauge 2 and the mud level gauge 1 are installed in parallel inside the purified water tank and the measuring ends of both extend into the purified water tank, and the other ends of both are connected to the Internet of Things data box 8; the liquid level gauge 2 and the mud level gauge 1 are also connected to the solar panel 7.

[0034] The online water quality monitoring sensor 3 is located 50cm below the liquid level and 100cm above the sludge layer inside the purified water tank. Both the level gauge 2 and the sludge level gauge 1 are connected to the IoT data box 8 via waterproof cables.

[0035] The specific implementation process of this embodiment is as follows:

[0036] After pretreatment and advanced treatment, produced water from the oilfield flows into a purification tank for storage. Over time, this sedimentation process in the tank gradually accumulates a certain thickness of sludge. Level gauge 2 and sludge level gauge 1 are used to monitor the liquid level and sludge layer height within the purification tank. The monitoring data is then transmitted sequentially to computer 9 via a waterproof cable and an IoT data box 8. Computer 9 identifies the sludge layer thickness and liquid level height within the purification tank and, as needed, controls the electric actuator 6 to adjust the height of the fixed plate 5 within the tank, ensuring that the online water quality monitoring sensor 3 is always positioned between the liquid level and the sludge layer.

[0037] The sludge in the purified water tank may contain oil, suspended solids (SS), chemical oxygen demand (COD), and chemical residues (such as flocculants). A sludge level gauge 1 monitors the sludge layer thickness, and the monitoring data is transmitted sequentially to a computer 9 via a waterproof cable and an IoT data box 8. When the sludge layer thickness reaches 10%-15% of the effective volume of the purified water tank, timely manual intervention is performed to remove the sludge, effectively preventing secondary pollution of the water to be reinjected into the purified water tank by pollutants released from the sludge.

Claims

1. A real-time water quality measuring device for a purified water tank, comprising a liquid level measuring device and a sludge level measuring device located within the purified water tank; characterized in that, The purified water tank is also equipped with an online water quality monitoring sensor (3) that enables vertical height adjustment. The online water quality monitoring sensor (3) is located in the middle position below the liquid level and above the sludge layer in the purified water tank. It also includes a monitoring system, which is electrically connected to the liquid level measuring device, the sludge level measuring device and the online water quality monitoring sensor (3).

2. The real-time water quality measuring device for the produced water purification tank according to claim 1, characterized in that, A fixed frame (4) is provided in the purified water tank along the longitudinal direction, and the bottom end of the fixed frame (4) is connected to the bottom of the purified water tank; a fixed plate (5) is slidably arranged on the fixed frame (4), and the water quality online monitoring sensor (3) is located on the fixed plate (5).

3. The real-time water quality measuring device for the produced water purification tank according to claim 2, characterized in that, It also includes a push rod, which is arranged parallel to the fixed frame (4). The fixed plate (5) is connected to the fixed frame (4) in an "L" shape. The fixed plate (5) is slidably connected to the fixed frame (4) through the push rod.

4. The real-time water quality measuring device for the produced water purification tank according to claim 1, characterized in that, The online water quality monitoring sensor (3) includes, but is not limited to, a pH sensor, a dissolved oxygen sensor, an oil content sensor, and a suspended solids sensor.

5. The real-time water quality measuring device for the produced water purification tank according to claim 3, characterized in that, The monitoring system includes an Internet of Things (IoT) data box (8) and a computer (9) located outside the water purification tank, and also includes a power supply device connected to the IoT data box (8); the power supply device is a solar panel (7) located outside the water purification tank; the solar panel (7) is also connected to a liquid level measuring device, a mud level measuring device and a water quality online monitoring sensor (3).

6. The real-time water quality measuring device for the produced water purification tank according to claim 5, characterized in that, The push rod is an electric push rod (6), which is electrically connected to the computer (9) via a motor (10). The electric push rod (6) is also electrically connected to the solar panel (7).

7. The real-time water quality measuring device for the produced water purification tank according to claim 5, characterized in that, The liquid level measuring device is a liquid level gauge (2), and the mud level measuring device is a mud level gauge (1); the liquid level gauge (2) and the mud level gauge (1) are installed in parallel inside the purified water tank and the measuring ends of both extend into the purified water tank, and the other ends of both are connected to the Internet of Things data box (8); the liquid level gauge (2) and the mud level gauge (1) are also connected to the solar panel (7).

8. The real-time water quality measuring device for the produced water purification tank according to claim 7, characterized in that, The water quality online monitoring sensor (3) is located in the middle position, 50cm below the liquid level in the purified water tank and 100cm above the sludge layer.

9. The real-time water quality measuring device for the produced water purification tank according to claim 7, characterized in that, The liquid level gauge (2) and the mud level gauge (1) are both connected to the Internet of Things data box (8) via waterproof cables.

Images