CN103836343A - Electrically-driven heat recovery type liquid nitrogen pump device with large discharge capacity - Google Patents
Electrically-driven heat recovery type liquid nitrogen pump device with large discharge capacity Download PDFInfo
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- CN103836343A CN103836343A CN201410099881.7A CN201410099881A CN103836343A CN 103836343 A CN103836343 A CN 103836343A CN 201410099881 A CN201410099881 A CN 201410099881A CN 103836343 A CN103836343 A CN 103836343A
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Abstract
The invention discloses an electrically-driven heat recovery type liquid nitrogen pump device with large discharge capacity. The device comprises a device supporting platform. The platform is provided with a control chamber, a transformer, a lubrication cooling system, a liquid nitrogen plunger pump, a liquid nitrogen evaporator, a liquid nitrogen container, a high pressure manifold, a low pressure manifold, a liquid nitrogen pressurization centrifugal pump, a cooling liquid pump and a cooling liquid tank. The platform is further provided with an electrically driving system and a control system. The electrically driving system comprises a motor and a motor driving device corresponding to the motor, wherein the motor is used for driving the liquid nitrogen plunger pump, the liquid nitrogen pressurization centrifugal pump and the cooling liquid pump. The control system comprises a main power control system and an auxiliary power control system, wherein the main power control system is used for controlling the motor driving device, and the auxiliary power control system is used for controlling the lubrication cooling system. According to the electrically-driven heat recovery type liquid nitrogen pump device with the large discharge capacity, the motor is used as a power source, the defects and deficiencies that critical components of an existing liquid nitrogen pump device is low in import substitution rate and high in operation cost, matching of a motor and a torque converter is difficult and the device is prone to ultralimit are avoided, and popularization and using are facilitated.
Description
Technical field
The invention belongs to petroleum drilling and mining technical field, the key equipment of a kind of nitrogen operation relating to, specifically a kind of electronic large discharge capacity thermal recovery type liquid nitrogen pump equipment that drives.
Background technique
Utilize nitrogen to process and there is feature safe, that efficient, success rate is high oil well, oil reservoir.Be not only applicable to conventional oil reservoir, and have original effect yet in low pressure, the special oil and gas pools such as hypotonic, clay is cementing., good stability low based on density of nitrogen, the easy feature such as compression, it is having a wide range of applications aspect raising recovery rate and drilling well, perforation, well stimulation and well workover, and such as nitrogen gaslift, nitrogen replacement, mixed air pressure split, mix gas acidifying, nitrogen positive/negative-pressure perforation, nitrogen cushion test etc.Aspect natural gas extraction, nitrogen pressure break obvious technical effects, has become indispensable technology in gas exploitation course, is widely used.Aspect coal-bed gas exploitation, the stimulation technology gas displacing coal-bed with nitrogen also become one of developing direction of Coal-seam Gas Recovery Technologies.Along with the expansion of liquid nitrogen plant application, oil gas field user will continue to increase the demand of liquid nitrogen plant, and market potential is huge.
The key equipment of nitrogen operation is liquid nitrogen pump equipment.Liquid nitrogen pump equipment mainly contains direct-fired and non-direct-fired two kinds.At present, liquid nitrogen pump equipment is mainly direct-fired both at home and abroad, and direct-combustion type liquid nitrogen pumping unit is more easily realized large discharge capacity with respect to thermal recovery type liquid nitrogen pump equipment.Along with the continuous progress of fracturing technology and technology, the related request of construction safety and the protection of oil reservoir gas is more and more harsher, and liquid nitrogen job execution will be more and more general in field use, more and more higher to the security requirement meeting of liquid nitrogen pump equipment.For the higher Oil/gas Well of inflammable gas content, open firing is easily blasted, and has potential safety hazard.Therefore large discharge capacity heat reclamation type (non-direct-fired) liquid nitrogen pump equipment will be following main flow equipment.
Its key components and parts of liquid nitrogen pump equipment of domestic production all adopts external import, degree domestic is lower, this component import, the method that equipment is assembled at home, although save certain cost than direct intake energy, core technology is not grasped, and added value of product is low, compared with offshore company, there is no competitive advantage.
In prior art, no matter be imported product or home equipment, main what adopt is the power scheme that is Movers based on diesel engine.The subject matter existing: 1,, when the single-machine capacity of liquid nitrogen pump equipment reaches 1500KW when above, motor cost rises rapidly, type selecting difficulty; 2, due to powerful diesel engine and gearbox dimensional weight large, be unfavorable for the design of equipment scheme and the exploitation of more high-power pumping unit, Diesel Driven scheme becomes the exploitation bottleneck of restriction Novel liquid nitrogen pumping unit; 3, the Component selection narrow range such as supporting torque-converters, price is high, lead time is long, Important Components (as motor, torque-converters, transfer case etc.) all needs import, not only causes complete machine with high costs, has also hindered the exploitation with independent intellectual property right equipment; 4,, when high-power liquid nitrogen pump equipment moves, fuel consume is large, operating cost is high, noise is large, it is high to discharge.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, the large discharge capacity thermal recovery type liquid nitrogen pump of a kind of electric drive equipment is provided, it is simple in structure, modern design is reasonable, the critical component localization rate of parts and components is high, cost is low, procurement cycle is short, after sales service is convenient, automaticity is high, increase work efficiency, energy supply is convenient, be easy to safeguard, functional reliability is high, solve the defect that the critical component localization rate of parts and components is low, operating cost is high, equipment easily transfinites and deficiency that existing liquid nitrogen pump equipment exists, be convenient to promote the use of.
For realizing above-mentioned technical purpose, scheme provided by the invention is: the large discharge capacity thermal recovery type liquid nitrogen pump of a kind of electric drive equipment, comprise that equipment relies on platform, liquid nitrogen pump PCO plant control office is installed on described platform, lubricating and cooling system, liquid nitrogen plunger pump, liquid nitrogen evaporator, liquid nitrogen container, the high pressure pipe joint of discharging for nitrogen, the low-pressure manifold sucking for liquid nitrogen, liquid nitrogen boosting centrifugal pump, coolant pump, tank for coolant, it is characterized in that: described equipment is also provided with the electric drive trains control system of unifying, described electric drive system comprises for driving liquid nitrogen plunger pump, the liquid nitrogen plunger pump motor of liquid nitrogen boosting centrifugal pump and coolant pump running, boosting centrifugal pump motor and coolant pump motor, liquid nitrogen plunger pump motor is connected with liquid nitrogen pump motor drive, boosting centrifugal pump motor is connected with boosting centrifugal pump motor drive, coolant pump motor is connected with coolant pump motor drive unit, described control system comprises active force control system for controlling motor drive and for controlling the auxiliary power control system of lubricating and cooling system, active force control system and auxiliary power control system are installed in control cabinet, described liquid nitrogen pump motor drive, boosting centrifugal pump motor drive, coolant pump motor drive unit, active force control system and auxiliary power control system are all passed through external power source, the exhaust gas heat exchanger supporting with equipment heat-exchange system has thermostat.
And described liquid nitrogen plunger pump motor is connected with liquid nitrogen plunger pump by liquid nitrogen pump motor coupling; Described boosting centrifugal pump motor is connected with liquid nitrogen boosting centrifugal pump by boosting centrifugal pump motor coupling; Described coolant pump motor is connected with coolant pump by coolant pump motor coupling.
And described external power source comprises well site power supply and/or generator set.
And, the transformer that described well site power supply comprises well site electrical network, is connected with well site electrical network, this transformer is arranged on equipment platform, and described liquid nitrogen pump motor drive, boosting centrifugal pump motor drive, coolant pump motor drive unit, active force control system and auxiliary power control system all connect with this transformer.
And the quantity of described generator set is one, or the quantity of generator set is many, and many described generator set are parallel with one another.
And described generator set is driven by turbogenerator.
And, described liquid nitrogen plunger pump motor, boosting centrifugal pump motor and coolant pump motor are Wechselstrommotor or direct current motor, and described liquid nitrogen pump motor drive, boosting centrifugal pump motor drive, coolant pump motor drive unit is AC motor driving apparatus or the DC motor drive device supporting with aforementioned electric motivation.
And described AC motor driving apparatus is frequency variator; Described DC motor drive device is controllable silicon.
And, the tail gas of discharging when described exhaust gas heat exchanger absorbs turbogenerator generating on vehicular platform, and/or the tail gas that discharges in operation process of well site miscellaneous equipment.
The present invention compared with prior art has the following advantages:
1) after the present invention adopts motor as power source, the hydraulic system on legacy equipment is cancelled, structure is simpler, and design has more rationality;
2) the critical component localization rate of parts and components is high, cost is low, procurement cycle is short, after sales service is convenient: in the present invention, motor and corresponding frequency variator, controllable silicon etc. all have ripe product at home, type selecting is convenient, can be according to the power of the suitable motor of the power selection of liquid nitrogen pump, during with motor drive drive motor, overall cost is lower than motor scheme;
3) automaticity is high, increase work efficiency: under motor drive drives, motor can be exported under different capacity, thereby keep best energy utilization rate, operation consumption is dropped to minimum, effects of energy saving and emission reduction is good, can realize the various coupling way of outputs of moment of torsion, rotating speed simultaneously, is easy to improve automatic control level and the efficiency of liquid nitrogen pump equipment;
4) energy supply is convenient: the present invention adopts electric drive mode, can directly utilize well site mains supply, saves fuel oil transport;
5) be easy to safeguard: the present invention adopts motor as power source, compared with powerful diesel engine, this electricity scheme of driving is safeguarded simple, controls index few, has greatly reduced line service amount and cost;
6) functional reliability is high: the reliability of electric motor system is far above diesel engine system, Wechselstrommotor can realize 20 years non-maintaining, no matter motor drive is to adopt frequency variator or controllable silicon, all can ensure long-term uninterrupted operation.
Brief description of the drawings
Fig. 1 is plan view of the present invention;
Fig. 2 is plan view of the present invention;
Fig. 3 is embodiments of the present invention schematic diagram.
Wherein, 1, platform, 2, control room, 2-1, liquid nitrogen pump motor drive, 2-2, boosting centrifugal pump motor drive, 2-3, coolant pump motor drive unit, 2-4, control cabinet, 3, transformer, 4, liquid nitrogen plunger pump motor, 5, liquid nitrogen pump motor coupling, 6, liquid nitrogen plunger pump, 7, low-pressure manifold, 8, boosting centrifugal pump motor, 9, boosting centrifugal pump motor coupling, 10, liquid nitrogen boosting centrifugal pump, 11, liquid nitrogen container, 12, delivery cock valve, 13, high pressure pipe joint, 14, liquid nitrogen evaporator, 15, coolant pump motor, 16, coolant pump motor coupling, 17, coolant pump, 18, tank for coolant, 19, lubricating and cooling system, 20, well factory power supply, 21, exhaust gas heat exchanger, 22, thermostat.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
The present embodiment provides a kind of electronic large discharge capacity thermal recovery type liquid nitrogen pump equipment that drives, as Fig. 1, Fig. 2, shown in Fig. 3, the equipment that the present invention includes relies on platform 1, on described platform 1, liquid nitrogen pump PCO plant control office 2 is installed, lubricating and cooling system 19, liquid nitrogen plunger pump 6, liquid nitrogen evaporator 14, liquid nitrogen container 11, and the low-pressure manifold 7 of the high pressure pipe joint 13 of discharging for nitrogen and liquid nitrogen suction, liquid nitrogen boosting centrifugal pump 10, coolant pump 17, tank for coolant 18, the electric drive trains control system of unifying is also installed on platform 1, described electric drive system comprises for driving liquid nitrogen plunger pump 6, the liquid nitrogen plunger pump motor 4 that liquid nitrogen boosting centrifugal pump 10 and coolant pump 17 turn round, boosting centrifugal pump motor 8 and coolant pump motor 15 and corresponding motor drive, comprise liquid nitrogen pump motor drive 2-1, boosting centrifugal pump motor drive 2-2, coolant pump motor drive unit 2-3.Described control system comprises active force control system for controlling motor drive and for controlling the auxiliary power control system of lubricating and cooling system 19.Active force control system and auxiliary power control system are installed in control cabinet 2-4.Motor drive, active force control system and auxiliary power control system are all passed through external power source.
In embodiments of the present invention, also comprise platform device necessary device in addition.Comprise well factory power supply 20, thermostat 22 and with the supporting exhaust gas heat exchanger 21 of equipment heat-exchange system, the tail gas of discharging when the waste gas that this exhaust gas heat exchange absorbs comprises turbogenerator generating can be also the tail gas that well site miscellaneous equipment discharges in operation process.
Further, described liquid nitrogen plunger pump motor 4 is connected with liquid nitrogen plunger pump 6 by liquid nitrogen pump motor coupling 5; Described boosting centrifugal pump motor 8 is connected with liquid nitrogen boosting centrifugal pump 10 by boosting centrifugal pump motor coupling 9; Described coolant pump motor 15 is connected with coolant pump 17 by coolant pump motor coupling 16.
Further, described external power source comprises well site power supply 20 and/or generator set.
Further, the transformer 3 that described well site power supply 20 comprises well site electrical network, is connected with well site electrical network, this transformer 3 is arranged on equipment platform 1, and described liquid nitrogen pump motor drive 2-1, boosting centrifugal pump motor drive 2-2, coolant pump motor drive unit 2-3, active force control system and auxiliary power control system all connect with this transformer 3.
Further, the quantity of described generator set is one, or the quantity of generator set is many, and many described generator set are parallel with one another.
Further, described generator set is driven by turbogenerator.
Further, described liquid nitrogen plunger pump motor 4, boosting centrifugal pump motor 8 and coolant pump motor 15 are Wechselstrommotor or direct current motor, and described liquid nitrogen pump motor drive 2-1, boosting centrifugal pump motor drive 2-2, coolant pump motor drive unit 2-3 is AC motor driving apparatus or the DC motor drive device supporting with aforementioned electric motivation.
Further, described AC motor driving apparatus is frequency variator; Described DC motor drive device is controllable silicon.
The cooling liquid of high temperature is pumped from tank for coolant 18 by coolant pump 17, the liquid nitrogen evaporator 14 of first flowing through, now with liquid nitrogen heat exchange after coolant temperature decline and become cryogenic liquid, cryogenic liquid reclaims heat through exhaust gas heat exchanger 21 and becomes high temperature coolant, high temperature coolant is got back to tank for coolant 18, and then pumped by coolant pump 17, form liquid circulation loop.When liquid nitrogen discharge capacity is low, the cooling liquid rear temperature of liquid nitrogen evaporator 14 of flowing through is still very high, and thermostat 22 can disconnect automatically, without exhaust gas heat exchanger 21, directly gets back in tank for coolant 18.
Working principle: provide liquid nitrogen by equipment liquid nitrogen container 11, also can directly provide liquid nitrogen by outside tank car or liquid nitrogen container sledge.Liquid nitrogen passes through low-pressure manifolds 7 by liquid nitrogen boosting centrifugal pump 10 and finally enters the suction port of liquid nitrogen plunger pump 6 by a series of Subzero valve control.After 6 runnings of liquid nitrogen plunger pump, by low pressure liquid nitrogen, through plunger pump, supercharging becomes high-pressure liquid nitrogen, and high-pressure liquid nitrogen becomes normal temperature high voltage nitrogen after liquid nitrogen evaporator 14 absorbs heat, then discharges through the discharge system of high pressure pipe joint 13.
In sum: the present invention is directed to existing liquid nitrogen pump equipment and adopt traditional diesel engine large as the fuel consume of power source existence, the supporting difficulty of motor and torque-converters, the problems such as the critical component localization rate of parts and components is low, propose using motor as prime mover, utilize outside a large amount of used heat as heat exchange heat source, thereby improve the large discharge capacity liquid nitrogen pump of the electric drive equipment scheme of rate of heat exchange, simple in structure, rationally novel in design, supporting convenience, cost is low, automatic control level is high, be easy to safeguard, functional reliability is high, energy supply is convenient, using effect is good, be convenient to promote the use of.
Be more than preferred embodiment of the present invention, not the present invention imposed any restrictions, every any simple modification of above implementation column being done according to the technology of the present invention essence, change and equivalent structure change, and all still belong to the protection domain of technical solution of the present invention.
Claims (10)
1. the large discharge capacity thermal recovery type liquid nitrogen pump of an electric drive equipment, comprise that equipment relies on platform, liquid nitrogen pump PCO plant control office is installed on described platform, lubricating and cooling system, liquid nitrogen plunger pump, liquid nitrogen evaporator, liquid nitrogen container, the high pressure pipe joint of discharging for nitrogen, the low-pressure manifold sucking for liquid nitrogen, liquid nitrogen boosting centrifugal pump, coolant pump, tank for coolant, it is characterized in that: the electric drive trains control system of unifying is also installed on described platform, described electric drive system comprises for driving liquid nitrogen plunger pump, the liquid nitrogen plunger pump motor of liquid nitrogen boosting centrifugal pump and coolant pump running, boosting centrifugal pump motor and coolant pump motor, liquid nitrogen plunger pump motor is connected with liquid nitrogen pump motor drive, boosting centrifugal pump motor is connected with boosting centrifugal pump motor drive, coolant pump motor is connected with coolant pump motor drive unit, described control system comprises active force control system for controlling motor drive and for controlling the auxiliary power control system of lubricating and cooling system, active force control system and auxiliary power control system are installed in control cabinet, described liquid nitrogen pump motor drive, boosting centrifugal pump motor drive, coolant pump motor drive unit, active force control system and auxiliary power control system are all passed through external power source, the exhaust gas heat exchanger supporting with equipment heat-exchange system has thermostat.
2. the large discharge capacity thermal recovery type liquid nitrogen pump of a kind of electric drive according to claim 1 equipment, is characterized in that: described platform is vehicular platform, or sledge assembling platform, or trailer platform.
3. the large discharge capacity thermal recovery type liquid nitrogen pump of a kind of electric drive according to claim 2 equipment, it is characterized in that: the tail gas of discharging when described exhaust gas heat exchanger absorbs turbogenerator generating on vehicular platform, and/or the tail gas that discharges in operation process of well site miscellaneous equipment.
4. the large discharge capacity thermal recovery type liquid nitrogen pump of a kind of electric drive according to claim 1 equipment, is characterized in that: described liquid nitrogen plunger pump motor is connected with liquid nitrogen plunger pump by liquid nitrogen pump motor coupling; Described boosting centrifugal pump motor is connected with liquid nitrogen boosting centrifugal pump by boosting centrifugal pump motor coupling; Described coolant pump motor is connected with coolant pump by coolant pump motor coupling.
5. the large discharge capacity thermal recovery type liquid nitrogen pump of a kind of electric drive according to claim 1 equipment, is characterized in that: described external power source comprises well site power supply and/or generator set.
6. the large discharge capacity thermal recovery type liquid nitrogen pump of a kind of electric drive according to claim 5 equipment, it is characterized in that: the transformer that described well site power supply comprises well site electrical network, is connected with well site electrical network, this transformer is arranged on equipment platform, and described liquid nitrogen pump motor drive, boosting centrifugal pump motor drive, coolant pump motor drive unit, active force control system and auxiliary power control system all connect with this transformer.
7. the large discharge capacity thermal recovery type liquid nitrogen pump of a kind of electric drive according to claim 5 equipment, it is characterized in that: the quantity of described generator set is one, or the quantity of generator set is many, and many described generator set is parallel with one another.
8. the large discharge capacity thermal recovery type liquid nitrogen pump of a kind of electric drive according to claim 7 equipment, is characterized in that: described generator set is driven by turbogenerator.
9. the large discharge capacity thermal recovery type liquid nitrogen pump of a kind of electric drive according to claim 1 equipment, it is characterized in that: described liquid nitrogen plunger pump motor, boosting centrifugal pump motor and coolant pump motor are Wechselstrommotor or direct current motor, described liquid nitrogen pump motor drive, boosting centrifugal pump motor drive, coolant pump motor drive unit is AC motor driving apparatus or the DC motor drive device supporting with aforementioned electric motivation.
10. the large discharge capacity thermal recovery type liquid nitrogen pump of a kind of electric drive according to claim 9 equipment, is characterized in that: described AC motor driving apparatus is frequency variator; Described DC motor drive device is controllable silicon.
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| CN201410099881.7A CN103836343A (en) | 2014-03-18 | 2014-03-18 | Electrically-driven heat recovery type liquid nitrogen pump device with large discharge capacity |
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| CN201410099881.7A CN103836343A (en) | 2014-03-18 | 2014-03-18 | Electrically-driven heat recovery type liquid nitrogen pump device with large discharge capacity |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104482402A (en) * | 2014-11-27 | 2015-04-01 | 三一重型能源装备有限公司 | Liquid nitrogen pump truck |
| CN104565813A (en) * | 2015-01-20 | 2015-04-29 | 三一重型能源装备有限公司 | Liquid nitrogen truck |
| CN105090741A (en) * | 2015-09-02 | 2015-11-25 | 三一重型能源装备有限公司 | Liquid nitrogen pump casting device and liquid nitrogen pump truck |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482402A (en) * | 2014-11-27 | 2015-04-01 | 三一重型能源装备有限公司 | Liquid nitrogen pump truck |
| CN104565813A (en) * | 2015-01-20 | 2015-04-29 | 三一重型能源装备有限公司 | Liquid nitrogen truck |
| CN104565813B (en) * | 2015-01-20 | 2017-01-18 | 三一石油智能装备有限公司 | Liquid nitrogen truck |
| CN105090741A (en) * | 2015-09-02 | 2015-11-25 | 三一重型能源装备有限公司 | Liquid nitrogen pump casting device and liquid nitrogen pump truck |
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