Power supply equipment special for supplying energy to high-energy-gathering impact demulsification dehydration device
By using three-phase to DC circuit, DC to AC inverter circuit and voltage amplification circuit in power supply equipment, combined with fast charging circuit and dual-loop discharge circuit, and alternately supplying energy by supercapacitors, the problems of insufficient impact force of the demulsification and difficulty in increasing the voltage in the prior art are solved, and a more efficient dehydration effect is achieved.
Patent Information
- Application Number
- CN202411750101.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-04-01
AI Technical Summary
During the energy supply process of existing power supply equipment, the impact force of the demulsification is insufficient, and due to the continuous characteristics of the AC voltage, the current is very high during the power-up process of oil with high water content, and it is difficult to increase the voltage under the limit of the equipment capacity, resulting in unsatisfactory dehydration effect.
The three-phase to DC circuit, the DC to AC inverter circuit and the voltage amplification circuit are adopted, combined with the fast charging circuit and the dual-loop discharge circuit, and the two sets of supercapacitors are used to power the electrode plate in the dewatering tank to achieve high voltage and high frequency energy supply.
By improving the stability of the energy supply voltage and the impact force of the dehumidification, a better dehumidification effect is achieved, with a greater energy density and a better dehumidification effect. The combination of coalescence and impact dehumidification function is further improved.
Smart Images
Figure CN119742911A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of power supply equipment, and in particular to a power supply equipment specially used for supplying energy to a high-energy impact demulsification and dehydration device. Background Art
[0002] The crude oil extracted from the oil well contains more impurities and sediment. In the process of extraction, due to the existence of groundwater and the need for water injection and backfilling, the newly extracted crude oil often contains water. The water content of crude oil will not only increase the additional energy consumption and burden on the storage, transportation and extraction of crude oil, but also the salt substances in the water will cause scaling and corrosion of the pipeline, thus creating a safety hazard. Therefore, the water content of crude oil is harmful and has no benefits. Dehydration of crude oil is very necessary.
[0003] Electric demulsification and dehydration is a commonly used method for crude oil dehydration. Its principle is to promote the separation of oil and water ions through the action of electric ions, and to wet and aggregate and demulsify. When using this method for dehydration, a power supply device is required to supply energy to the plates in the dehydration tank. The voltage, frequency and other parameters of the energy supply directly affect the effect and efficiency of demulsification. The existing power supply device adopts the method of first powering on and then increasing the voltage. The disadvantage of this method is that the demulsification impact force is insufficient, and due to the continuity of the AC voltage, the current during the power-on process of the oil with a high water content is very large. Due to the capacity limitation of the equipment, usually when the current is large, the required voltage is higher, but in actual operation, the voltage is limited and difficult to rise to the required value, resulting in unsatisfactory dehydration effect. Therefore, a power supply device specifically for high-energy impact demulsification and dehydration devices is needed to solve the above problems. Summary of the invention
[0004] The object of the present invention is to provide a power supply device specifically for supplying energy to a high-energy impact demulsification and dehydration device, so as to solve the problems existing in the prior art mentioned in the above background technology.
[0005] To achieve the above object, the present invention provides the following technical solutions:
[0006] A power supply device specially used for supplying energy to a high-energy impact demulsification and dehydration device comprises a three-phase DC-to-DC circuit, a DC-to-AC inverter circuit and a voltage amplification circuit. The output end of the three-phase DC-to-DC circuit is connected to the input end of the DC-to-AC inverter circuit. The output end of the DC-to-AC inverter circuit is connected to the voltage amplification circuit. The output end of the voltage amplification circuit is connected to a fast charging circuit and a dual-circuit discharge circuit. Two supercapacitors are connected to the fast charging circuit and the dual-circuit discharge circuit. The two supercapacitors are used to alternately supply energy to the high-energy impact demulsification and dehydration device.
[0007] Preferably, the three-phase DC-to-DC circuit uses a three-phase thyristor voltage regulator and contains a filter circuit to obtain a DC current.
[0008] Preferably, the DC to AC inverter circuit uses IGBT to form an H-bridge circuit to convert the set voltage into high-frequency AC power.
[0009] Preferably, the voltage amplification circuit adopts a boost transformer, and the boost transformer adopts an amorphous iron core.
[0010] Preferably, the fast charging circuit includes SW1 and SW3, the dual-circuit discharge circuit includes SW2 and SW4, SW1 and SW2 are connected in series, SW3 and SW4 are connected in series, SW1 and SW2 as a whole are connected in parallel with SW3 and SW4 as a whole, one end of the supercapacitor is connected to the connection node of SW1 and SW2, and the other end of the supercapacitor is connected to the connection node of SW3 and SW4.
[0011] Preferably, the fast charging circuit and the dual-circuit discharge circuit are controlled by a high-voltage controllable pulse generator to achieve high-voltage fast energy storage and discharge impact demulsification and dehydration.
[0012] Preferably, the filtering circuit includes a harmonic absorption circuit and a ripple filtering circuit.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] 1. The present invention adopts two sets of supercapacitor charging and discharging hardware to supply energy to the middle plate of the dehydration tank, which has the advantages of stable energy supply voltage and strong demulsification impact force. By setting a fast charging circuit and a double-loop discharge circuit, the two sets of supercapacitors are alternately charged and discharged to supply energy to the middle plate of the dehydration tank, thereby increasing the frequency to twice that of the low-voltage side, with a higher energy density and a better demulsification effect.
[0015] 2. During the period when the supercapacitor is charged and the load is disconnected, the power supply device outputs another low-voltage power to the blade electrodes, forming a coalescence electric field between the blade electrodes, which can achieve coalescence and sedimentation of small water droplets. The combination of coalescence and impact demulsification and dehydration functions further improves the dehydration effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is the overall electrical schematic diagram of the power supply device of the present invention.
[0017] Figure 2 This is the electrical schematic diagram of the three-phase DC conversion circuit of the present invention.
[0018] Figure 3 The figure is an electrical schematic diagram of the DC to AC inverter circuit of the present invention.
[0019] Figure 4This is the electrical schematic diagram of the voltage amplifier circuit of the present invention.
[0020] Figure 5 This is an electrical schematic diagram of the fast charging circuit of the present invention.
[0021] Figure 6 The electrical schematic diagram of the connection between the fast charging circuit and the dual-circuit discharge circuit of the present invention.
[0022] Figure 7 It is a schematic diagram of the connection between the power supply device of the present invention and the electrode plate in the dehydration tank. DETAILED DESCRIPTION
[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.
[0024] See also Figure 1-7 , the present invention provides the following technical solutions:
[0025] A power supply device specially used for supplying energy to a high-energy impact demulsification and dehydration device comprises a three-phase DC-to-DC circuit, a DC-to-AC inverter circuit and a voltage amplification circuit. The three-phase DC-to-DC circuit uses a three-phase thyristor voltage regulator and is program-controlled with an adjustment step of 0.5 electrical degrees. The circuit also contains a filter circuit to obtain a DC current. The filter circuit comprises a harmonic absorption circuit and a ripple filtering circuit to minimize the generation of harmonics in the equipment and improve the utilization rate of electric energy.
[0026] The output end of the three-phase DC-to-AC inverter circuit is connected to the input end of the DC-to-AC inverter circuit. The DC-to-AC inverter circuit uses IGBT to form an H-bridge circuit to convert the set voltage into high-frequency AC power. The frequency 10-30KHZ can be set. High-voltage thyristors can be used under low-frequency conditions, and high-voltage IGBTs are used under high-frequency conditions.
[0027] The output end of the DC-to-AC inverter circuit is connected to a voltage amplifier circuit, which boosts high-frequency AC pulses to several times higher voltage through a high-frequency high-power transformer. The voltage amplifier circuit uses a step-up transformer, which uses an amorphous iron core with high magnetic permeability and large window size, which is convenient for winding high-power windings and beneficial to the heat dissipation of the iron core and windings. The step-up transformer uses insulating oil for circulating cooling. The volume of the step-up transformer is greatly reduced compared to the industrial frequency transformer, less than half the volume of an ordinary transformer, and has impact and vibration resistance.
[0028] The output end of the voltage amplifier circuit is connected to a fast charging circuit and a dual-loop discharge circuit, the fast charging circuit includes SW1 and SW3, the dual-loop discharge circuit includes SW2 and SW4, SW1 and SW2 are connected in series, SW3 and SW4 are connected in series, SW1 and SW2 as a whole are connected in parallel with SW3 and SW4 as a whole, one end of the supercapacitor is connected to the connection node of SW1 and SW2, and the other end of the supercapacitor is connected to the connection node of SW3 and SW4.
[0029] The fast charging circuit and the dual-circuit discharge circuit are connected to two supercapacitors, and the two supercapacitors are used to alternately supply energy to the high-energy impact demulsification and dehydration device; the fast charging circuit and the dual-circuit discharge circuit are controlled by a high-voltage controllable pulse generator to achieve high-voltage rapid energy storage and discharge impact demulsification and dehydration.
[0030] The power supply equipment adopts digital control scheme for rectification and voltage regulation control, and the IGBT inverter control also adopts digital program control to ensure the accuracy of frequency and control. The control board communicates with the HMI interactively to facilitate the setting of operating parameters. After the HMI parameters are set, they are confirmed to be stored in the main control board. The HMI receives the actual operating parameters sent by the control board, which is convenient for the on-duty personnel to understand the equipment operation status.
[0031] The working process of the present invention is as follows:
[0032] Figure 2 The three-phase to DC circuit is shown in Figure 1. It adjusts the three-phase power supply to a DC power supply circuit, uses a fully controlled thyristor to adjust the voltage, and then passes through Figure 3 The DC to AC inverter circuit shown in the figure uses IGBT to convert DC power into AC power. Figure 2 , 3 G101, G102, G103, and G104 are IGBT modules. At this time, the voltage amplitude is 0 to ±530V. Figure 4 The voltage amplification circuit shown in the figure rapidly increases the voltage to the voltage value of 10-30KV required for demulsification, and then fully charges the supercapacitor through the high-voltage and high-frequency controlled rectifier D1. This is the energy storage process. The high-voltage controllable pulse generator controls the high-voltage element to unidirectionally connect the supercapacitor and the plate to achieve high-voltage rapid impact demulsification.
[0033] like Figure 6As shown, the tank contains dehydration electrodes, C-1 and CN are high-voltage fast-charging supercapacitors, SW1 and SW3 charge the capacitors respectively, and SW2 and SW4 transfer the energy charged by the capacitors to the plates in the tank to achieve crude oil dehydration; when SW1 charges the supercapacitor corresponding to C-1, SW2, SW3, and SW4 are disconnected and do not work. After the C-1 capacitor is fully charged, SW1 is disconnected, and SW2 is turned on to transfer electrical energy to the plates in the tank. At the same time, SW3 charges CN. When CN is fully charged, SW2 is disconnected, and SW4 is turned on to transfer electrical energy to the plates in the tank. At this time, SW1 charges C-1 again, and this cycle repeats. SW1-4 is equivalent to two groups of charge and discharge combinations, which can increase the frequency to twice the low-voltage side. In addition, during the period when the supercapacitor is charged and the load is disconnected, the power supply outputs another low-voltage power (200-500v, 3-5KHZ) to the blade electrode, forming a coalescence electric field between the blade electrodes, which can achieve the coalescence and sedimentation of small water droplets. The controlled high-pressure impact demulsification adopts a double circuit to discharge electric energy, which increases the demulsification frequency to twice the original one, with greater energy density and better demulsification effect. The dehydration effect is further improved by combining the coalescence and impact demulsification dehydration functions.
[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A power supply device specially used for supplying energy to a high-energy impact demulsification and dehydration device, characterized in that: The invention comprises a three-phase DC-to-DC circuit, a DC-to-AC inverter circuit and a voltage amplifier circuit. The output end of the three-phase DC-to-DC circuit is connected to the input end of the DC-to-AC inverter circuit. The output end of the DC-to-AC inverter circuit is connected to the voltage amplifier circuit. The output end of the voltage amplifier circuit is connected to a fast charging circuit and a dual-circuit discharge circuit. Two super capacitors are connected to the fast charging circuit and the dual-circuit discharge circuit. The two super capacitors are used to alternately supply energy to the high-energy impact demulsification and dehydration device.
2. A power supply device specially used for supplying energy to a high-energy impact demulsification and dehydration device according to claim 1, characterized in that: The three-phase DC-to-DC circuit uses a three-phase thyristor voltage regulator and contains a filter circuit to obtain a DC current.
3. A power supply device specially used for supplying energy to a high-energy impact demulsification and dehydration device according to claim 1, characterized in that: The DC to AC inverter circuit uses IGBT to form an H-bridge circuit to convert the set voltage into high-frequency AC power.
4. A power supply device specially used for supplying energy to a high-energy impact demulsification and dehydration device according to claim 1, characterized in that: The voltage amplification circuit adopts a boost transformer, and the boost transformer adopts an amorphous iron core.
5. The power supply device specially used for supplying energy to a high-energy impact demulsification and dehydration device according to claim 1, characterized in that: The fast charging circuit includes SW1 and SW3, and the dual-circuit discharge circuit includes SW2 and SW4. SW1 and SW2 are connected in series, SW3 and SW4 are connected in series, SW1 and SW2 as a whole are connected in parallel with SW3 and SW4 as a whole, one end of the supercapacitor is connected to the connection node of SW1 and SW2, and the other end of the supercapacitor is connected to the connection node of SW3 and SW4.
6. The power supply device specially used for supplying energy to a high-energy impact demulsification and dehydration device according to claim 1, characterized in that: The fast charging circuit and the double-circuit discharge circuit are controlled by a high-voltage controllable pulse generator to achieve high-voltage fast energy storage and discharge impact demulsification and dehydration.
7. The power supply device specially used for supplying energy to the high-energy impact demulsification and dehydration device according to claim 2, characterized in that: The filter circuit includes a harmonic absorption circuit and a ripple filtering circuit.