Intelligent emulsion preparation device

Abstract

This invention relates to an intelligent emulsion preparation device, comprising a tank, an oil tank, a water tank, an emulsion preparation vessel, a stirrer, and a temperature control device. The emulsion preparation vessel is located at the center of the tank, with the oil tank and water tank located on either side. A torque tester is mounted on the stirring shaft. Multiple conductivity detection points are vertically arranged on the inner wall of the emulsion preparation vessel, with a conductivity sensor located at one of these points. Two pressurizing devices are located on the top of the tank, directly above the oil tank and water tank, respectively, with their pressure plates extending into the oil tank and water tank. A wireless temperature sensor is installed inside the tank, and a heating port is provided, connected to the temperature control device. A signal conversion and processing device and a corresponding data acquisition card on the controller are connected to a microprocessor, which in turn connects to an alarm and the display screen of the control panel. This invention enables intelligent preparation of fresh crude oil emulsions.

Description

Technical Field

[0001] This invention relates to the preparation technology of crude oil emulsions used in experimental research, and more specifically to an intelligent emulsion preparation device. Background Technology

[0002] As oil development moves towards deeper waters, oil-gas-water mixed transportation will become one of the main modes of transport in long-distance offshore oilfield gathering pipelines. During oil-water mixed transportation, the oil-water mixture undergoes high-speed shearing at wellheads, pumps, and throttle valves, forming a crude oil emulsion. The rheological properties of this crude oil emulsion are one of the key fundamental data points for the design and management of oil-water mixed transportation pipelines. They are also the ultimate determining factor for the safe restart of such pipelines and are crucial data for pipeline shutdown-restart calculations and pumpability evaluations.

[0003] The measurement of the rheological properties of crude oil emulsions is generally performed in the laboratory. However, for most crude oil emulsions, including waxy crude oil, samples taken from the production site have undergone changes in rheological properties and problems such as flocculation and demulsification due to shear history, thermal history, and the passage of time before measurement. Therefore, most researchers use freshly prepared crude oil emulsions in the laboratory as experimental samples, and currently, fresh crude oil emulsions in the laboratory are prepared manually. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent emulsion preparation device that solves the problem of manual preparation of fresh crude oil emulsions in the laboratory in the prior art, and realizes intelligent preparation of fresh crude oil emulsions.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: This intelligent emulsion preparation device includes a tank, an oil tank, a water tank, an emulsion preparation tank, a stirrer, a temperature control device, a 304 booster pump, and an alarm. The emulsion preparation tank is located in the center of the tank, with the oil tank and water tank located on opposite sides of the emulsion preparation tank. The control panel is located outside the tank, and the controller is located behind the control panel. The stirrer extends into the emulsion preparation tank, and a torque tester is installed on the stirring shaft. Multiple conductivity detection positions are arranged vertically on the inner wall of the emulsion preparation tank, and a conductivity sensor is installed at one of the conductivity detection positions. The emulsion preparation tank is connected to both the oil tank and the water tank. High-temperature solenoid valves and flow meters are installed on the pipes connecting the oil tank and water tank to the emulsion preparation tank. Two pressurizing devices are installed on the top of the tank, one directly above the oil tank and the other above the water tank. The pressure plate of each pressurizing device extends into the oil tank and the other into the water tank. A wireless temperature sensor is installed inside the tank, and a heating port is provided. The heating port is connected to a thermostat. The stirrer, pressurizing device, thermostat, wireless temperature sensor, high-temperature solenoid valve, flow meter, conductivity sensor, and torque tester are all connected to the controller. The signal conversion and processing device and the corresponding data acquisition card on the controller are connected to the microprocessor. The microprocessor is connected to the alarm and the display screen of the control panel.

[0006] A method for preparing emulsions with microprocessor-controlled viscosity.

[0007] Using the model The target torque is obtained based on the target emulsion viscosity and rotation speed, where T is the target torque (Nm); η is the emulsion viscosity (mPa·s); L is the stirrer rod length (m); and k is the torque. s denoted by Metzner constant; N is the rotational speed in rad / s; D is the propeller diameter in m; a is a dimensionless quantity.

[0008]

[0009] In the formula, L is the rod length, in meters; k s denoted by Metzner constant; N is rotational speed, rad / s; D is impeller diameter, m; h is impeller height, m; P is stirring power, W; W is impeller blade width, m.

[0010] The rotation speed is determined according to the experimental scheme. During preparation, the microprocessor uses the model to calculate the target torque. The viscosity of the emulsion in the emulsion preparation tank changes continuously. When the stirrer reaches the target torque, the viscosity of the emulsion in the emulsion preparation tank reaches the target emulsion viscosity. The microprocessor controls the stirrer to stop working, and the emulsion preparation is completed.

[0011] The above solution includes a start button, a stop button, a zeroing button, a warning light, a display screen, and operation buttons on the control panel. When the warning light flashes green, it indicates that the emulsion has been prepared.

[0012] In the above scheme, the emulsion preparation tank, oil tank and water tank are all transparent and made of a high-temperature resistant transparent material with good thermal conductivity.

[0013] The temperature control device in the above scheme is a duct heater or an air conditioner.

[0014] The present invention has the following beneficial effects:

[0015] 1. This invention realizes intelligent preparation of fresh crude oil emulsions. It applies the theories of thermodynamics and viscous fluid mechanics to describe the conditional parameter relationships of the emulsion preparation process with viscous flow entropy production, and realizes the quantitative characterization of the relationship between various preparation conditional parameters of the emulsion.

[0016] 2. This invention can intelligently prepare simulated oil-water emulsions with the same rheological properties as those under actual production conditions, providing a basis for experimental research on the rheological properties of crude oil emulsions. Attached Figure Description

[0017] Figure 1 This is the front view of the present invention;

[0018] Figure 2 This is a schematic diagram of the back of the operation panel of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the working process of the present invention.

[0021] In the diagram: 1 Control panel; 2 Controller; 3 Display screen; 4 Warning light; 5 Housing; 6 Cable; 7 Oil inlet; 8 Water inlet; 9 Heating port; 10 Oil tank; 11 Water tank; 12 Emulsion preparation tank; 13 Agitator; 14 Pressurization device; 15 Conductivity sensor; 16 High-temperature solenoid valve; 17 Flow meter; 18 Wireless temperature sensor. Detailed Implementation

[0022] The invention will now be further described with reference to the accompanying drawings:

[0023] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, this intelligent emulsion preparation device includes a housing 5, an oil tank 10, a water tank 11, an emulsion preparation tank 12, a stirrer 13, a temperature control device, a 304 booster pump, and an alarm. The emulsion preparation tank 12 is located at the center of the housing 5. The oil tank 10 and water tank 11 are located on opposite sides of the emulsion preparation tank 12. The control panel 1 is located outside the housing, and the controller 2 is located behind the control panel. The stirrer 13 extends into the emulsion preparation tank 12, and a torque tester is installed on the stirring shaft. The torque tester uses a wireless torque sensor. Multiple conductivity detection positions are set vertically along the inner wall of the emulsion preparation tank, and a conductivity sensor 15 is installed at one of the conductivity detection positions. The emulsion preparation tank is connected to the oil tank and the water tank, and the oil tank and the water tank are connected to the emulsion preparation tank. High-temperature solenoid valves 16 and flow meters 17 are installed on the pipelines. The oil inlet 7 of the oil tank extends from the tank body, and the water inlet 8 of the water tank extends from the tank body. Two pressurizing devices 14 are installed on the top of the tank body, which are located directly above the oil tank and the water tank, respectively. The pressure plate of each pressurizing device extends into the oil tank and the water tank, respectively. A wireless temperature sensor 18 is installed inside the tank body, and a heating port 9 is provided in the tank body. The heating port is connected to a constant temperature device. The stirrer 13, the pressurizing device 14, the constant temperature device, the wireless temperature sensor 18, the high-temperature solenoid valve 16, the flow meter 17, the conductivity sensor 15, and the wireless torque sensor are all connected to the controller 2. The signal conversion and processing device and the corresponding data acquisition card on the controller are connected to the microprocessor. The microprocessor is connected to the alarm and the display screen 3 of the control panel.

[0024] One end of the emulsion preparation tank 12 is connected to the oil tank 10 via a pipe, and the other end of the emulsion preparation tank 12 is connected to the water tank 11 and the tank body 5 via two independent pipes respectively. High-temperature solenoid valves 16 and flow meters 17 are installed on the pipes connecting the oil tank and the water tank to the emulsion preparation tank. For emulsions with different preparation requirements, there are corresponding matching devices. For detailed specifications of the matching devices, please refer to the specification reference table. Here, we take the preparation of 200ml of W / O type emulsion with a viscosity of 80mPa.s at 60℃ as an example. The emulsion preparation tank is a preparation tank with a diameter of 64mm and a height of 102mm. The rotor of the stirrer is a double-ribbon rotor with a blade diameter of 60.95mm and a blade width of 6.4mm. The control panel 1 is equipped with a start button, a stop button, a zeroing button, a warning light 4, a display screen 3, and operation buttons. When the warning light flashes green, it indicates that the emulsion has been prepared.

[0025] The constant temperature device uses a hot air circulation heating device, that is, a duct heater is connected to the heating port to make the ambient temperature inside the box reach the required temperature. The wireless temperature sensor inside the box is used to collect the real-time temperature of the internal environment of the box. The signal conversion and processing device on the controller 2 and the corresponding data acquisition card are connected to the microprocessor. The microprocessor is connected to the display screen of the control panel so that the processed data is displayed on the control panel screen.

[0026] In this invention, the emulsion preparation tank 12, oil tank 10 and water tank 11 are all made of a transparent material with good thermal conductivity and high temperature resistance. The tank body is made of a transparent material with good thermal insulation and high temperature resistance. The emulsion preparation tank body is provided with conductivity detection positions at different positions. According to the emulsion preparation requirements, the conductivity detection device is fixed at one of the detection positions. The pressurization device consists of an electric push rod and a pressure plate.

[0027] The control motherboard of this invention includes a zeroing circuit module; a signal conversion, processing and data acquisition circuit module for a flow meter; a signal conversion, processing and data acquisition circuit module for a conductivity sensor; a signal conversion, processing and data acquisition circuit module for a wireless temperature sensor; and an alarm circuit module. The intelligent emulsion preparation device is equipped with a cable 6 and a plug for power supply.

[0028] A method for preparing emulsions by controlling the viscosity using a microprocessor.

[0029] Using the model The target torque is obtained based on the target emulsion viscosity and rotation speed, where T is the target torque (Nm); η is the emulsion viscosity (mPa·s); L is the stirrer rod length (m); and k is the torque. s denoted by Metzner constant; N is the rotational speed in rad / s; D is the propeller diameter in m; a is a dimensionless quantity.

[0030]

[0031] In the formula, L is the rod length, in meters; k s denoted by Metzner constant; N is rotational speed, rad / s; D is impeller diameter, m; h is impeller height, m; P is stirring power, W; W is impeller blade width, m.

[0032] The rotation speed is determined according to the experimental scheme. Generally, 800 r / min, 900 r / min, and 1000 r / min are selected according to the experimental scheme. During preparation, the microprocessor uses the model to calculate the target torque. The viscosity of the emulsion in the emulsion preparation tank changes continuously. When the stirrer reaches the target torque, the viscosity of the emulsion in the emulsion preparation tank reaches the target emulsion viscosity. The microprocessor controls the stirrer to stop working, and the emulsion preparation is completed.

[0033] See Figure 3During emulsion preparation: Start the hot air circulation device to begin heating. Once the ambient temperature displayed on the control panel reaches the set temperature, use a 304 booster pump to add measured amounts of oil and water to the oil tank and water tank respectively to heat them to the preparation temperature. According to the above model, given the emulsion viscosity and rotation speed, the corresponding torque can be obtained. Use the operation buttons on the control panel to input the viscosity, temperature, concentration of the prepared emulsion, and the rotation speed of the telescopic agitator. Then press the start button. The oil tank pressurization device starts, and the high-temperature solenoid valve for controlling the oil opens. When the liquid level in the emulsion preparation tank reaches the specified value, the oil tank pressurization device closes, and the high-temperature solenoid valve for controlling the oil closes. The water tank pressurization device starts, and the high-temperature solenoid valve for controlling the water opens. When the liquid level in the emulsion preparation tank reaches the final value, the water tank pressurization device closes, and the high-temperature solenoid valve for controlling the water closes. The agitator starts. When the agitator reaches the fixed torque, the agitator stops working, the warning light flashes green, and the emulsion preparation is complete.

[0034] Table 1: Agitator Specifications Reference Table-1:

[0035] T / D <![CDATA[k s ]]> W / T P / D H / T Double ribbon 1.05 36.73±1.4 0.1 0.5,1,1.5 1～3

[0036] Table 2: Agitator Specifications Reference Table-2:

[0037]

[0038] The wireless temperature sensor, conductivity sensor, and flow meter operate as follows: The signal conversion and processing device and corresponding data acquisition card on the controller collect and process the signals sent by the wireless temperature sensor, conductivity sensor, and flow meter. The processed data is displayed on the control panel screen. When a set value is reached, the controller outputs a switching signal, which, through a relay or contactor, controls the start and stop of each device.

[0039] The alarm works through the alarm circuit module, which operates as follows: after the emulsion preparation and cleaning are completed, the warning light will flash green.

[0040] The preparation method of the above-mentioned intelligent emulsion preparation device:

[0041] Step 1: After connecting the intelligent emulsion preparation device to the power supply, turn it on and set the configuration temperature through the control panel. Turn on the hot air circulation device to heat the emulsion. When the display shows that the ambient temperature has reached the set value, use the 304 booster pump to add a fixed amount of oil and water to the oil tank and water tank to heat them to the configuration temperature.

[0042] Step 2: Set the concentration, viscosity, and stirrer speed of the emulsion using the operation buttons on the control panel. After setting the required quantity, press the system start button on the control panel.

[0043] Step 3: When the warning light on the control panel flashes green, determine whether the type of emulsion is correct based on the conductivity value displayed on the display panel. If correct, press the sampling button on the control panel and take a sample at the sampling port.

[0044] Step 4: After draining the oil sample, water, and emulsion, introduce an appropriate amount of kerosene into the oil tank, press the cleaning button on the control panel, and wait for all the kerosene to be drained from the sampling port. The emulsion preparation is now complete.

Claims

1. An intelligent emulsion configuration device, characterized by: The intelligent emulsion preparation device comprises a box, an oil tank, a water tank, an emulsion preparation tank, a stirrer, a constant temperature device, a 304 booster pump, an alarm, the emulsion preparation tank is arranged at the central part of the box, the oil tank and the water tank are respectively arranged on the two sides of the emulsion preparation tank, a control panel is arranged outside the box, a control instrument is arranged at the rear part of the control panel, the stirrer is arranged into the emulsion preparation tank, a torque tester is arranged on the stirring shaft, a plurality of conductivity detection positions are arranged on the inner wall of the emulsion preparation tank in the vertical direction, a conductivity sensor is arranged at one of the conductivity detection positions, the emulsion preparation tank is connected with the oil tank and the water tank, high-temperature electromagnetic valves and flow meters are arranged on the pipelines connected with the emulsion preparation tank; two pressurizing devices are arranged on the top of the box, the two pressurizing devices are respectively arranged above the oil tank and the water tank, the pressure discs of the two pressurizing devices are respectively arranged into the oil tank and the water tank; a wireless temperature sensor is arranged in the box, a heating port is arranged on the box, and the heating port is connected with the constant temperature device; the stirrer, the pressurizing device, the constant temperature device, the wireless temperature sensor, the high-temperature electromagnetic valve, the flow meter, the conductivity sensor and the torque tester are connected with the control instrument, the signal conversion and processing device and the corresponding data acquisition card on the control instrument are connected with a microprocessor, and the microprocessor is connected with the alarm and the display screen of the control panel. The microprocessor controls the method for preparing the emulsion viscosity, Utilizing the model The target torque is obtained according to the target emulsion viscosity and the rotational speed, wherein T is the target torque, N.m. η is the emulsion viscosity, mPa.s; L is the length of the stirrer shaft, m; K S is the Metzner constant; N is the rotational speed, rad / s; D is the diameter of the paddle, m; a is a dimensionless quantity; In the formula, h is the height of the stirrer, m; P is the stirring power, W; and W is the width of the blade of the stirrer, m; The rotation speed is determined according to an experimental scheme, during preparation, the microprocessor calculates the target torque by using the model, the viscosity of the emulsion in the emulsion preparation tank is continuously changed, when the stirrer reaches the target torque, the viscosity of the emulsion in the emulsion preparation tank reaches the target emulsion viscosity, the microprocessor controls the stirrer to stop working, and the emulsion preparation is completed.

2. The intelligent emulsion configuration device of claim 1, wherein: The control panel is provided with a start button, an off button, a zero reset button, a warning light, a display screen and operation buttons, when the warning light flashes green, the emulsion preparation is completed.

3. The intelligent emulsion configuration device of claim 2, wherein: The emulsion preparation tank, the oil tank and the water tank are transparent and are made of transparent materials with good heat conduction effect and high temperature resistance.

4. The intelligent emulsion configuration device of claim 3, wherein: The constant temperature device is a wind channel heater or an air conditioner.

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