CN104419450A - Electric desalting and electric dehydrating power supply equipment and control method thereof - Google Patents
Electric desalting and electric dehydrating power supply equipment and control method thereof Download PDFInfo
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- CN104419450A CN104419450A CN201310407478.1A CN201310407478A CN104419450A CN 104419450 A CN104419450 A CN 104419450A CN 201310407478 A CN201310407478 A CN 201310407478A CN 104419450 A CN104419450 A CN 104419450A
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- thyristor stack
- silicon controlled
- negative electrode
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- rectifier
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G33/00—Dewatering or demulsification of hydrocarbon oils
- C10G33/02—Dewatering or demulsification of hydrocarbon oils with electrical or magnetic means
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G32/00—Refining of hydrocarbon oils by electric or magnetic means, by irradiation, or by using microorganisms
- C10G32/02—Refining of hydrocarbon oils by electric or magnetic means, by irradiation, or by using microorganisms by electric or magnetic means
Abstract
The invention discloses electric desalting and electric dehydrating power supply equipment and a control method thereof, and belongs to the field of crude oil treatment of an oil field. The power supply equipment comprises an adjusting module, a transformer module and an electric desalting tank body, wherein a first input end of the adjusting module is connected with a first phase of a three-phase power supply; a second input end of the adjusting module is connected with a second phase of the three-phase power supply; a third input end of the adjusting module is connected with a third phase of the three-phase power supply; an output end of the adjusting module is connected with the input end of the transformer module; and the output end of the transformer module is connected with the electric desalting tank body, so that an electric field is formed in the electric desalting tank body, and thus electric desalting and electric dehydrating on the crude oil are achieved. According to the electric desalting and electric dehydrating power supply equipment, the utilization rate of the electric desalting and electric dehydrating power supply equipment is improved.
Description
Technical field
The present invention relates to crude oil process field, particularly a kind of electric desalting electro-dewatering power unit and control method thereof.
Background technology
In the exploitation of crude oil, generally can add a certain amount of water and emulsifying agent in crude oil, water and emulsifying agent can reduce former oil viscosity, and then are extracted out by crude oil by oil pumper.Owing to containing inorganic salt in water, can there is very large harm in inorganic salt and water in Crude Oil Processing, so needed to carry out electric desalting and electro-dewatering process by electric desalting electro-dewatering power unit to crude oil before to crude oil processing.
At present, electric desalting electro-dewatering power unit comprises: transformer, rectifier and electric desalting tank body, and transformer comprises primary winding and two groups of secondary coils, comprises the first pole plate, the second pole plate, tri-electrode and quadripolar plate in electric desalting tank body.The primary winding of transformer is connected with two-phase power supply, and one group of secondary coil of transformer is connected with rectifier, and another group secondary coil of transformer is connected with the tri-electrode in electric desalting tank body.Wherein, the alternating-current that one group of secondary coil of transformer exports exports two direct currents after rectifier rectification, be input to respectively on the first pole plate in electrical desalter and the second pole plate and form DC electric field, the alternating-current that another group coil of transformer exports is directly inputted on the tri-electrode in electrical desalter, make tri-electrode and quadripolar plate form alternating-electric field, by the DC electric field in electrical desalter and alternating-electric field, electric desalting and electro-dewatering process are carried out to crude oil.
Realizing in process of the present invention, contriver finds that prior art at least exists following problem:
Along with the increase of Oil extraction amount, the water injected in crude oil and emulsifying agent get more and more, and make the specific conductivity of crude oil increasing, and then make the electric current of the two-phase electricity that transformer connects in electric desalting electro-dewatering power supply also increasing; When the electric current of the two-phase electricity that transformer in electric desalting electro-dewatering power supply connects is increasing, the gap of this biphase current and an other phase current is larger, three-phase imbalance can be more and more serious, and transformer connects two-phase power supply, makes the utilization ratio of transformer lower.
Summary of the invention
In order to solve the problem of prior art, embodiments provide a kind of electric desalting electro-dewatering power unit and control method thereof.Described technical scheme is as follows:
On the one hand, provide a kind of electric desalting electro-dewatering power unit, described power unit comprises:
Adjustment module, voltage changing module and electric desalting tank body;
The first input end of described adjustment module is connected with the first-phase of three-phase supply, second input terminus of described adjustment module is connected with the second-phase of described three-phase supply, 3rd input terminus of described adjustment module is connected with the third phase of described three-phase supply, the output terminal of described adjustment module is connected with the input terminus of described voltage changing module, the output terminal of described voltage changing module is connected with described electric desalting tank body, make to form electric field in described electric desalting tank body, to realize carrying out electric desalting and electro-dewatering process to crude oil.
Wherein, described adjustment module comprises: the first thyristor stack, the second thyristor stack, the 3rd thyristor stack, controllable silicon controller, programmable logic controller, current transformer and voltage transformer;
The input terminus of described first thyristor stack is connected with the first-phase of described three-phase supply, the output terminal of described first thyristor stack is connected with the first input end of described voltage changing module, the input terminus of described second thyristor stack is connected with the second-phase of described three-phase supply, the output terminal of described second thyristor stack is connected with the second input terminus of described voltage changing module, the input terminus of described 3rd thyristor stack is connected with the third phase of described three-phase supply, and the output terminal of described 3rd thyristor stack is connected with the 3rd input terminus of described voltage changing module;
Described first thyristor stack, described second thyristor stack are connected with described controllable silicon controller respectively with described 3rd thyristor stack, one end of described programmable logic controller is connected with described controllable silicon controller, the other end of described programmable logic controller is connected with described current transformer, described current transformer is serially connected on the output terminal of described 3rd thyristor stack, one end of described voltage transformer is connected across between the output terminal of described second thyristor stack and the output terminal of described 3rd thyristor stack, and the other end of described voltage transformer is connected with described controllable silicon controller.
Further, described first thyristor stack comprises the first silicon controlled rectifier and the second silicon controlled rectifier, and described second thyristor stack comprises the 3rd silicon controlled rectifier and the 4th silicon controlled rectifier, and described 3rd thyristor stack comprises the 5th silicon controlled rectifier and the 6th silicon controlled rectifier,
Described first silicon controlled anode is connected with described second silicon controlled negative electrode, forms the input terminus of described first thyristor stack, and described first silicon controlled negative electrode is connected with described second silicon controlled anode, forms the output terminal of described first thyristor stack;
Described 3rd silicon controlled anode is connected with described 4th silicon controlled negative electrode, forms the input terminus of described second thyristor stack, and described 3rd silicon controlled negative electrode is connected with described 4th silicon controlled anode, forms the output terminal of described second thyristor stack;
Described 5th silicon controlled anode is connected with described 6th silicon controlled negative electrode, forms the input terminus of described 3rd thyristor stack, and described 5th silicon controlled negative electrode is connected with described 6th silicon controlled anode, forms the output terminal of described 3rd thyristor stack.
Wherein, described first silicon controlled negative electrode is connected with the first negative electrode pin of described controllable silicon controller, described first silicon controlled control pole controls pin with first of described controllable silicon controller and is connected, described second silicon controlled negative electrode is connected with the second negative electrode pin of described controllable silicon controller, and described second silicon controlled control pole controls pin with second of described controllable silicon controller and is connected;
Described 3rd silicon controlled negative electrode is connected with the 3rd negative electrode pin of described controllable silicon controller, described 3rd silicon controlled control pole controls pin with the 3rd of described controllable silicon controller and is connected, described 4th silicon controlled negative electrode is connected with the 4th negative electrode pin of described controllable silicon controller, and described 4th silicon controlled control pole controls pin with the 4th of described controllable silicon controller and is connected;
Described 5th silicon controlled negative electrode is connected with the 5th negative electrode pin of described controllable silicon controller, described 5th silicon controlled control pole controls pin with the 5th of described controllable silicon controller and is connected, described 6th silicon controlled negative electrode is connected with the 6th negative electrode pin of described controllable silicon controller, and described 6th silicon controlled control pole controls pin with the 6th of described controllable silicon controller and is connected.
Further, the other end of described voltage transformer is connected with the voltage of alternating current feedback pin of described controllable silicon controller, and one end of described programmable logic controller is connected respectively with the given pin of the voltage of described controllable silicon controller and given common port pin.
Further, described voltage changing module comprises step-up transformer, the first rectifier, the second rectifier and the 3rd rectifier;
The first input end of described step-up transformer is connected with the output terminal of described first thyristor stack, second input terminus of described step-up transformer is connected with the output terminal of described second thyristor stack, 3rd input terminus of described step-up transformer is connected with the output terminal of described 3rd thyristor stack, first output terminal of described step-up transformer is connected with the input terminus of described first rectifier, second output terminal of described step-up transformer is connected with the input terminus of described second rectifier, and the 3rd output terminal of described step-up transformer is connected with the input terminus of described 3rd rectifier.
Wherein, described first rectifier comprises the first commutation diode and the second commutation diode, and described second rectifier comprises the 3rd commutation diode and the 4th commutation diode, and described 3rd rectifier comprises the 5th commutation diode and the 6th commutation diode;
The negative electrode of described first commutation diode is connected with the anode of described second commutation diode, form the input terminus of described first rectifier, the negative electrode of described 3rd commutation diode is connected with the anode of described 4th commutation diode, form the input terminus of described second rectifier, the negative electrode of described 5th commutation diode is connected with the anode of described 6th commutation diode, forms the input terminus of described 3rd rectifier;
The anode of described first commutation diode, the anode of described 3rd commutation diode are connected with the anode of described 5th commutation diode and are input on the negative electrode plate in described electric desalting tank body, and the negative electrode of described second commutation diode, the negative electrode of described 4th commutation diode are connected with the negative electrode of described 6th commutation diode and are input on the positive electrode plate in described electric desalting tank body.
On the other hand, provide a kind of control method of electric desalting electro-dewatering power unit, described method comprises:
Gather the electric current of the 3rd thyristor stack output terminal, judge whether the electric current gathered is greater than predetermined current;
If the electric current of described collection is greater than described predetermined current, then the electric current of described 3rd thyristor stack output terminal is reduced to described predetermined current;
Gather the voltage between the output terminal of the second thyristor stack and the output terminal of described 3rd thyristor stack;
If the voltage of described collection does not reach predeterminated voltage, the silicon controlled conduction angle that the silicon controlled conduction angle then regulating the first thyristor stack to comprise, described second thyristor stack comprise and the silicon controlled conduction angle that described 3rd thyristor stack comprises, make the voltage between the output terminal of the output terminal of described second thyristor stack and described 3rd thyristor stack reach described predeterminated voltage.
Further, described method also comprises:
If the electric current gathered is less than or equal to described predetermined current, then keep the output voltage of described programmable logic controller constant.
Further, described method comprises:
If the electric current of described collection reaches pre-determined threshold, then turn off described power unit, and start timing;
When the time of timing reaches Preset Time, then reopen described power unit.
In embodiments of the present invention, three input terminuss of adjustment module connect three-phase supply, what three-phase supply connected is all single-phase loads, so, when the specific conductivity of crude oil is increasing, the electric current of the three-phase supply that the adjustment module in this electric desalting electro-dewatering power unit connects can increase simultaneously, can not cause the problem of three-phase imbalance, and adjustment module connects three-phase supply, improves the utilization ratio of this electric desalting electro-dewatering power unit.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of electric desalting electro-dewatering power unit apparatus structure schematic diagram that the embodiment of the present invention one provides;
Fig. 2 is the another kind of electric desalting electro-dewatering power unit apparatus structure schematic diagram that the embodiment of the present invention one provides;
Fig. 3 is a kind of electric desalting electro-dewatering power supply apparatus control method schema that the embodiment of the present invention three provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment one
Embodiments provide a kind of electric desalting electro-dewatering power unit, see Fig. 1, this power unit comprises: adjustment module 1, voltage changing module 2 and electric desalting tank body 3;
The first input end of adjustment module 1 is connected with the first-phase a of three-phase supply, second input terminus of adjustment module 1 is connected with the second-phase b of three-phase supply, 3rd input terminus of adjustment module 1 is connected with the third phase c of three-phase supply, the output terminal of adjustment module 1 is connected with the input terminus of voltage changing module 2, the output terminal of voltage changing module 2 is connected with electric desalting tank body 3, make to form electric field in electric desalting tank body 3, to realize carrying out electric desalting and electro-dewatering process to crude oil.
Wherein, in embodiments of the present invention, three input terminuss of adjustment module 1 connect three-phase supply, what three-phase supply all connect is single-phase load, so, when the specific conductivity of crude oil is increasing, the electric current of the three-phase supply that the adjustment module 1 in this electric desalting electro-dewatering power unit connects can increase simultaneously, can not cause the problem of three-phase imbalance, and adjustment module 1 connects three-phase supply, improve the utilization ratio of this electric desalting electro-dewatering power unit.
Wherein, adjustment module 1 comprises: the first thyristor stack 11, second thyristor stack 12, the 3rd thyristor stack 13, controllable silicon controller 14, programmable logic controller (Programmable logic Controller, PLC) 15, current transformer 16 and voltage transformer 17;
The input terminus of the first thyristor stack 11 is connected with the first-phase a of three-phase supply, the output terminal of the first thyristor stack 12 is connected with the first input end x1 of voltage changing module 2, the input terminus of the second thyristor stack 12 is connected with the second-phase b of three-phase supply, the output terminal of the second thyristor stack 12 is connected with the second input terminus y1 of voltage changing module 2, the input terminus of the 3rd thyristor stack 13 is connected with the third phase c of three-phase supply, and the output terminal of the 3rd thyristor stack 13 is connected with the 3rd input terminus z1 of voltage changing module 2;
First thyristor stack 11, second thyristor stack 12 is connected with controllable silicon controller 14 respectively with the 3rd thyristor stack 13, one end of programmable logic controller 15 is connected with controllable silicon controller 14, the other end of programmable logic controller 15 is connected with current transformer 16, current transformer 16 is serially connected on the output terminal of the 3rd thyristor stack 13, one end of voltage transformer 17 is connected across between the output terminal of the second thyristor stack 12 and the output terminal of the 3rd thyristor stack 13, and the other end of voltage transformer 17 is connected with controllable silicon controller 14.
Wherein, voltage transformer 17 is connected across between the output terminal of the second thyristor stack 12 and the output terminal of the 3rd thyristor stack 13, for gathering the voltage between the output terminal of the second thyristor stack 12 and the output terminal of the 3rd thyristor stack 13, and the voltage of collection is input in controllable silicon controller 14, form closed-loop control; The voltage of collection and predeterminated voltage compare by controllable silicon controller 14, if the voltage gathered reaches predeterminated voltage, then the silicon controlled conduction angle that the silicon controlled conduction angle do not comprised the first thyristor stack 11, the second thyristor stack 12 comprise and the silicon controlled conduction angle that the 3rd thyristor stack 13 comprises regulate; If the voltage gathered does not reach predeterminated voltage, the silicon controlled conduction angle that the silicon controlled conduction angle then regulating the first thyristor stack 11 to comprise, the second thyristor stack 12 comprise and the silicon controlled conduction angle that the 3rd thyristor stack 13 comprises, make the voltage between the output terminal of the output terminal of the second thyristor stack 12 and the 3rd thyristor stack 13 reach predeterminated voltage.
Wherein, the model of controllable silicon controller can be CF6B-5A.
Wherein, the output voltage of controllable silicon controller 14 is 0-5V, when the output voltage of controllable silicon controller 14 is 0V, first thyristor stack, the second thyristor stack and the 3rd thyristor stack all not conductings, when the output voltage of controllable silicon controller 14 is 5V, the first thyristor stack, the second thyristor stack and the full conducting of the 3rd thyristor stack.
Wherein, silicon controlled conduction angle with flow through this silicon controlled electric current and be inversely proportional to, when silicon controlled conduction angle reduces, flow through this silicon controlled electric current and increase, when silicon controlled conduction angle increases, flow through the reduction of this silicon controlled electric current.
Wherein, the voltage between the output terminal of the voltage between the output terminal of the first thyristor stack 11 and the output terminal of the second thyristor stack 12, voltage between the output terminal of the second thyristor stack 12 and the output terminal of the 3rd thyristor stack 13 and the first thyristor stack 11 and the output terminal of the 3rd thyristor stack 13 is equal.
Wherein, current transformer 16 is serially connected on the output terminal of the 3rd thyristor stack 13, for gathering the electric current of the 3rd thyristor stack 13 output terminal, the electric current of collection is input in programmable logic controller 15, the electric current of collection and predetermined current compare by programmable logic controller 15, if the electric current gathered is greater than predetermined current, then the electric current of the 3rd thyristor stack 13 output terminal is reduced to predetermined current, if the electric current gathered is less than or equal to predetermined current, then keep the output voltage of programmable logic controller constant, so achieve the control and protection to silicon controlled rectifier and step-up transformer.
Wherein, programmable logic controller is according to the electric current gathered, the voltage being input to controllable silicon controller is adjusted, make controllable silicon controller according to the output voltage of Voltage Cortrol first thyristor stack inputted, the second thyristor stack and the 3rd thyristor stack, to adapt to different crude oil, reach better treatment effect.
Wherein, when the electric current gathered is greater than predetermined current, programmable logic controller is equivalent to a constant current source, and when the electric current gathered is less than or equal to predetermined current, programmable logic controller is equivalent to a constant pressure source.
Wherein, the electric current of the electric current of the first thyristor stack 11 output terminal, the electric current of the second thyristor stack 12 output terminal and the 3rd thyristor stack 13 output terminal is equal.
Further, see Fig. 2, the first thyristor stack 11 comprises the first silicon controlled rectifier A+ and the second silicon controlled rectifier A-, and the second thyristor stack 12 comprises the 3rd silicon controlled rectifier B+ and the 4th silicon controlled rectifier B-, and the 3rd thyristor stack 13 comprises the 5th silicon controlled rectifier C+ and the 6th silicon controlled rectifier C-,
The anode of the first silicon controlled rectifier A+ is connected with the negative electrode A-K of the second silicon controlled rectifier A-, forms the input terminus of the first thyristor stack 11, and the negative electrode A+K of the first silicon controlled rectifier A+ is connected with the anode of the second silicon controlled rectifier A-, forms the output terminal of the first thyristor stack 11;
The anode of the 3rd silicon controlled rectifier B+ is connected with the negative electrode B-K of the 4th silicon controlled rectifier B-, forms the input terminus of the second thyristor stack 12, and the negative electrode B+K of the 3rd silicon controlled rectifier B+ is connected with the anode of the 4th silicon controlled rectifier B-, forms the output terminal of the second thyristor stack 12;
The anode of the 5th silicon controlled rectifier C+ is connected with the negative electrode C-K of the 6th silicon controlled rectifier C-, and form the input terminus of the 3rd thyristor stack 13, the negative electrode C+K of the 5th silicon controlled rectifier C+ is connected with the anode of the 6th silicon controlled rectifier C-, forms the output terminal of the 3rd thyristor stack 13.
Wherein, the negative electrode A+K of the first silicon controlled rectifier A+ is connected with the first negative electrode pin 19 of controllable silicon controller 14, the control pole A+G of the first silicon controlled rectifier A+ controls pin 20 with first of controllable silicon controller 14 and is connected, the negative electrode of the second silicon controlled rectifier A-K is connected with the second negative electrode pin 21 of controllable silicon controller 14, and the control pole A-G of the second silicon controlled rectifier A-controls pin 22 with second of controllable silicon controller 14 and is connected;
The negative electrode B+K of the 3rd silicon controlled rectifier B+ is connected with the 3rd negative electrode pin 23 of controllable silicon controller 14, the control pole B+G of the 3rd silicon controlled rectifier B+ controls pin 24 with the 3rd of controllable silicon controller 14 and is connected, the negative electrode B-K of the 4th silicon controlled rectifier B-is connected with the 4th negative electrode pin 25 of controllable silicon controller 14, and the control pole B-G of the 4th silicon controlled rectifier B-controls pin 26 with the 4th of controllable silicon controller 14 and is connected;
The negative electrode C+K of the 5th silicon controlled rectifier C+ is connected with the 5th negative electrode pin 27 of controllable silicon controller 14, the control pole C+G of the 5th silicon controlled rectifier C+ controls pin 28 with the 5th of controllable silicon controller 14 and is connected, the negative electrode C-K of the 6th silicon controlled rectifier C-is connected with the 6th negative electrode pin 29 of controllable silicon controller 14, and the control pole C-G of the 6th silicon controlled rectifier C-controls pin 30 with the 6th of controllable silicon controller 14 and is connected.
Further, the other end of voltage transformer 17 is connected respectively with the voltage of alternating current feedback pin 9 and 10 of controllable silicon controller 14, and one end of programmable logic controller 15 is connected respectively with the given pin of the voltage of controllable silicon controller 14 13 and given common port pin 15.
Wherein, see Fig. 2, voltage changing module 2 comprises step-up transformer 21, first rectifier 22, second rectifier 23 and the 3rd rectifier 24;
The first input end x1 of step-up transformer 21 is connected with the output terminal of the first thyristor stack 11, second input terminus y1 of step-up transformer 21 is connected with the output terminal of the second thyristor stack 12,3rd input terminus z1 of step-up transformer 21 is connected with the output terminal of the 3rd thyristor stack 13, first output terminal x2 of step-up transformer 21 is connected with the input terminus of the first rectifier 22, second output terminal y2 of step-up transformer 21 is connected with the input terminus of the second rectifier 23, and the 3rd output terminal z2 of step-up transformer 21 is connected with the input terminus of the 3rd rectifier 24.
First rectifier 22 comprises the first commutation diode and the second commutation diode, and the second rectifier 23 comprises the 3rd commutation diode and the 4th commutation diode, and the 3rd rectifier 24 comprises the 5th commutation diode and the 6th commutation diode;
The negative electrode of the first commutation diode is connected with the anode of the second commutation diode, form the input terminus of the first rectifier 22, the negative electrode of the 3rd commutation diode is connected with the anode of the 4th commutation diode, form the input terminus of the second rectifier 23, the negative electrode of the 5th commutation diode is connected with the anode of the 6th commutation diode, forms the input terminus of the 3rd rectifier 24;
The anode of the first commutation diode, the anode of the 3rd commutation diode are connected with the anode of the 5th commutation diode and are input on the negative electrode plate in electric desalting tank body 3, and the negative electrode of the second commutation diode, the negative electrode of the 4th commutation diode are connected with the negative electrode of the 6th commutation diode and are input on the positive electrode plate in electric desalting tank body 3.
Wherein, the anode of the first commutation diode, the anode of the 3rd commutation diode and the anode of the 5th commutation diode all export negative voltage, the negative electrode of the second commutation diode, the negative electrode of the 4th commutation diode and the negative electrode of the 6th commutation diode all export positive voltage, by the anode of the first commutation diode, the anode of the 3rd commutation diode is connected with the anode of the 5th commutation diode and is input on the negative electrode plate in electric desalting tank body 3, and by the negative electrode of the second commutation diode, the negative electrode of the 4th commutation diode is connected with the negative electrode of the 6th commutation diode and is input on the positive electrode plate in electric desalting tank body 3, make to form high-voltage dc in electric desalting tank body 3, realize carrying out electric desalting and electro-dewatering process to crude oil.
In embodiments of the present invention, three input terminuss of adjustment module connect three-phase supply, what three-phase supply connected is all single-phase loads, so, when the specific conductivity of crude oil is increasing, the electric current of the three-phase supply that the adjustment module in this electric desalting electro-dewatering power unit connects can increase simultaneously, can not cause the problem of three-phase imbalance, and adjustment module connects three-phase supply, improves the utilization ratio of this electric desalting electro-dewatering power unit.
Embodiment two
Embodiments provide a kind of method controlling electric desalting electro-dewatering power unit, the method can control the electric desalting electro-dewatering power unit described in Fig. 1 and Fig. 2, and see Fig. 3, the method comprises:
Step 101: the electric current gathering the 3rd thyristor stack output terminal, judges whether the electric current gathered is greater than predetermined current;
Step 102: if the electric current gathered is greater than predetermined current, then the electric current of the 3rd thyristor stack output terminal is reduced to predetermined current;
Wherein, if the electric current gathered is greater than predetermined current; programmable logic controller can reduce the voltage outputting to controllable silicon controller; controllable silicon controller can reduce silicon controlled conduction angle when input voltage reduces; thus reduce silicon controlled output voltage; and then the electric current of the 3rd thyristor stack output terminal is reduced to predetermined current, so, protect step-up transformer.
Step 103: gather the voltage between the output terminal of the second thyristor stack and the output terminal of the 3rd thyristor stack;
Step 104: if the voltage gathered does not reach predeterminated voltage, the silicon controlled conduction angle that the silicon controlled conduction angle then regulating the first thyristor stack to comprise, the second thyristor stack comprise and the silicon controlled conduction angle that the 3rd thyristor stack comprises, make the voltage between the output terminal of the output terminal of the second thyristor stack and the 3rd thyristor stack reach predeterminated voltage.
Wherein, the method also comprises:
If the electric current gathered is less than or equal to predetermined current, then keep the output voltage of programmable logic controller constant.
Further, the method comprises:
If the electric current gathered reaches pre-determined threshold, then power cutoff equipment, and starts timing;
When the time of timing reaches Preset Time, then reopen this power unit.
In embodiments of the present invention, gather the electric current of the 3rd thyristor stack output terminal, according to the electric current gathered, the voltage being input to controllable silicon controller is adjusted; And the voltage gathered between the output terminal of the second thyristor stack and the output terminal of the 3rd thyristor stack, controllable silicon controller is according to the output voltage of the voltage of input and Voltage Cortrol first thyristor stack of collection, the second thyristor stack and the 3rd thyristor stack, to adapt to different crude oil, reach better treatment effect.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage media mentioned can be read-only storage, disk or CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an electric desalting electro-dewatering power unit, is characterized in that, described power unit comprises: adjustment module, voltage changing module and electric desalting tank body;
The first input end of described adjustment module is connected with the first-phase of three-phase supply, second input terminus of described adjustment module is connected with the second-phase of described three-phase supply, 3rd input terminus of described adjustment module is connected with the third phase of described three-phase supply, the output terminal of described adjustment module is connected with the input terminus of described voltage changing module, the output terminal of described voltage changing module is connected with described electric desalting tank body, make to form electric field in described electric desalting tank body, to realize carrying out electric desalting and electro-dewatering process to crude oil.
2. power unit as claimed in claim 1, it is characterized in that, described adjustment module comprises: the first thyristor stack, the second thyristor stack, the 3rd thyristor stack, controllable silicon controller, programmable logic controller, current transformer and voltage transformer;
The input terminus of described first thyristor stack is connected with the first-phase of described three-phase supply, the output terminal of described first thyristor stack is connected with the first input end of described voltage changing module, the input terminus of described second thyristor stack is connected with the second-phase of described three-phase supply, the output terminal of described second thyristor stack is connected with the second input terminus of described voltage changing module, the input terminus of described 3rd thyristor stack is connected with the third phase of described three-phase supply, and the output terminal of described 3rd thyristor stack is connected with the 3rd input terminus of described voltage changing module;
Described first thyristor stack, described second thyristor stack are connected with described controllable silicon controller respectively with described 3rd thyristor stack, one end of described programmable logic controller is connected with described controllable silicon controller, the other end of described programmable logic controller is connected with described current transformer, described current transformer is serially connected on the output terminal of described 3rd thyristor stack, one end of described voltage transformer is connected across between the output terminal of described second thyristor stack and the output terminal of described 3rd thyristor stack, and the other end of described voltage transformer is connected with described controllable silicon controller.
3. power unit as claimed in claim 2, it is characterized in that, described first thyristor stack comprises the first silicon controlled rectifier and the second silicon controlled rectifier, and described second thyristor stack comprises the 3rd silicon controlled rectifier and the 4th silicon controlled rectifier, described 3rd thyristor stack comprises the 5th silicon controlled rectifier and the 6th silicon controlled rectifier
Described first silicon controlled anode is connected with described second silicon controlled negative electrode, forms the input terminus of described first thyristor stack, and described first silicon controlled negative electrode is connected with described second silicon controlled anode, forms the output terminal of described first thyristor stack;
Described 3rd silicon controlled anode is connected with described 4th silicon controlled negative electrode, forms the input terminus of described second thyristor stack, and described 3rd silicon controlled negative electrode is connected with described 4th silicon controlled anode, forms the output terminal of described second thyristor stack;
Described 5th silicon controlled anode is connected with described 6th silicon controlled negative electrode, forms the input terminus of described 3rd thyristor stack, and described 5th silicon controlled negative electrode is connected with described 6th silicon controlled anode, forms the output terminal of described 3rd thyristor stack.
4. power unit as claimed in claim 3, it is characterized in that, described first silicon controlled negative electrode is connected with the first negative electrode pin of described controllable silicon controller, described first silicon controlled control pole controls pin with first of described controllable silicon controller and is connected, described second silicon controlled negative electrode is connected with the second negative electrode pin of described controllable silicon controller, and described second silicon controlled control pole controls pin with second of described controllable silicon controller and is connected;
Described 3rd silicon controlled negative electrode is connected with the 3rd negative electrode pin of described controllable silicon controller, described 3rd silicon controlled control pole controls pin with the 3rd of described controllable silicon controller and is connected, described 4th silicon controlled negative electrode is connected with the 4th negative electrode pin of described controllable silicon controller, and described 4th silicon controlled control pole controls pin with the 4th of described controllable silicon controller and is connected;
Described 5th silicon controlled negative electrode is connected with the 5th negative electrode pin of described controllable silicon controller, described 5th silicon controlled control pole controls pin with the 5th of described controllable silicon controller and is connected, described 6th silicon controlled negative electrode is connected with the 6th negative electrode pin of described controllable silicon controller, and described 6th silicon controlled control pole controls pin with the 6th of described controllable silicon controller and is connected.
5. power unit as claimed in claim 2, it is characterized in that, the other end of described voltage transformer is connected with the voltage of alternating current feedback pin of described controllable silicon controller, and one end of described programmable logic controller is connected respectively with the given pin of the voltage of described controllable silicon controller and given common port pin.
6. power unit as claimed in claim 2, it is characterized in that, described voltage changing module comprises step-up transformer, the first rectifier, the second rectifier and the 3rd rectifier;
The first input end of described step-up transformer is connected with the output terminal of described first thyristor stack, second input terminus of described step-up transformer is connected with the output terminal of described second thyristor stack, 3rd input terminus of described step-up transformer is connected with the output terminal of described 3rd thyristor stack, first output terminal of described step-up transformer is connected with the input terminus of described first rectifier, second output terminal of described step-up transformer is connected with the input terminus of described second rectifier, and the 3rd output terminal of described step-up transformer is connected with the input terminus of described 3rd rectifier.
7. power unit as claimed in claim 6, it is characterized in that, described first rectifier comprises the first commutation diode and the second commutation diode, described second rectifier comprises the 3rd commutation diode and the 4th commutation diode, and described 3rd rectifier comprises the 5th commutation diode and the 6th commutation diode;
The negative electrode of described first commutation diode is connected with the anode of described second commutation diode, form the input terminus of described first rectifier, the negative electrode of described 3rd commutation diode is connected with the anode of described 4th commutation diode, form the input terminus of described second rectifier, the negative electrode of described 5th commutation diode is connected with the anode of described 6th commutation diode, forms the input terminus of described 3rd rectifier;
The anode of described first commutation diode, the anode of described 3rd commutation diode are connected with the anode of described 5th commutation diode and are input on the negative electrode plate in described electric desalting tank body, and the negative electrode of described second commutation diode, the negative electrode of described 4th commutation diode are connected with the negative electrode of described 6th commutation diode and are input on the positive electrode plate in described electric desalting tank body.
8. control a method for power unit described in any one of claim 1 to 7, it is characterized in that, described method comprises:
Gather the electric current of the 3rd thyristor stack output terminal, judge whether the electric current gathered is greater than predetermined current;
If the electric current of described collection is greater than described predetermined current, then the electric current of described 3rd thyristor stack output terminal is reduced to described predetermined current;
Gather the voltage between the output terminal of the second thyristor stack and the output terminal of described 3rd thyristor stack;
If the voltage of described collection does not reach predeterminated voltage, the silicon controlled conduction angle that the silicon controlled conduction angle then regulating the first thyristor stack to comprise, described second thyristor stack comprise and the silicon controlled conduction angle that described 3rd thyristor stack comprises, make the voltage between the output terminal of the output terminal of described second thyristor stack and described 3rd thyristor stack reach described predeterminated voltage.
9. method as claimed in claim 8, it is characterized in that, described method also comprises:
If the electric current gathered is less than or equal to described predetermined current, then keep the output voltage of described programmable logic controller constant.
10. method as claimed in claim 8, it is characterized in that, described method comprises:
If the electric current of described collection reaches pre-determined threshold, then turn off described power unit, and start timing;
When the time of timing reaches Preset Time, then reopen described power unit.
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| CN201310407478.1A CN104419450B (en) | 2013-09-09 | 2013-09-09 | A kind of electro-desalting electric dehydration power-supply device and control method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978393A (en) * | 2015-11-26 | 2016-09-28 | 中国石油天然气股份有限公司 | High-impedance alternating current and direct current superposition high-voltage power supply device for crude oil electric dehydration |
| CN111303935A (en) * | 2020-04-12 | 2020-06-19 | 鞍山国宇恒流源设备有限公司 | Constant current source intelligent control cabinet for crude oil electric dehydration |
| CN111303935B (en) * | 2020-04-12 | 2024-05-14 | 鞍山国宇恒流源设备有限公司 | Constant current source intelligent control cabinet for crude oil electric dehydration |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041036A (en) * | 2009-10-22 | 2011-05-04 | 江苏三星化工有限公司 | Novel high-speed electro-desalting power supply |
| CN103102927A (en) * | 2011-11-09 | 2013-05-15 | 长江(扬中)电脱盐设备有限公司 | Three-phase input and three-phase output electro-desalting power supply |
| CN203112759U (en) * | 2013-03-27 | 2013-08-07 | 北京科安博科技有限公司 | Electric desalting and dehydrating equipment of crude oil |
| CN103248244A (en) * | 2012-02-10 | 2013-08-14 | 长江(扬中)电脱盐设备有限公司 | Three-phase input single output electric desalting power supply |
-
2013
- 2013-09-09 CN CN201310407478.1A patent/CN104419450B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041036A (en) * | 2009-10-22 | 2011-05-04 | 江苏三星化工有限公司 | Novel high-speed electro-desalting power supply |
| CN103102927A (en) * | 2011-11-09 | 2013-05-15 | 长江(扬中)电脱盐设备有限公司 | Three-phase input and three-phase output electro-desalting power supply |
| CN103248244A (en) * | 2012-02-10 | 2013-08-14 | 长江(扬中)电脱盐设备有限公司 | Three-phase input single output electric desalting power supply |
| CN203112759U (en) * | 2013-03-27 | 2013-08-07 | 北京科安博科技有限公司 | Electric desalting and dehydrating equipment of crude oil |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978393A (en) * | 2015-11-26 | 2016-09-28 | 中国石油天然气股份有限公司 | High-impedance alternating current and direct current superposition high-voltage power supply device for crude oil electric dehydration |
| CN105978393B (en) * | 2015-11-26 | 2019-05-21 | 中国石油天然气股份有限公司 | A kind of crude oil electric dewatering high impedance alternating current-direct current superposition high voltage power supply device |
| CN111303935A (en) * | 2020-04-12 | 2020-06-19 | 鞍山国宇恒流源设备有限公司 | Constant current source intelligent control cabinet for crude oil electric dehydration |
| CN111303935B (en) * | 2020-04-12 | 2024-05-14 | 鞍山国宇恒流源设备有限公司 | Constant current source intelligent control cabinet for crude oil electric dehydration |
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| CN104419450B (en) | 2016-06-08 |
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Address after: 100007 Oil Mansion, Oil Mansion, 9 Dongzhimen North Street, Dongcheng District, Beijing. Co-patentee after: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Patentee after: PetroChina Co.,Ltd. Address before: 100007 Oil Mansion, Oil Mansion, 9 Dongzhimen North Street, Dongcheng District, Beijing. Co-patentee before: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Patentee before: PetroChina Co.,Ltd. |
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Effective date of registration: 20190524 Address after: 100007 Oil Mansion, Oil Mansion, 9 Dongzhimen North Street, Dongcheng District, Beijing. Co-patentee after: CNPC EAST CHINA DESIGN INSTITUTE CO.,LTD. Patentee after: PetroChina Co.,Ltd. Address before: 100007 Oil Mansion, Oil Mansion, 9 Dongzhimen North Street, Dongcheng District, Beijing. Co-patentee before: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Patentee before: PetroChina Co.,Ltd. |
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