CN103775029B - waste heat recovery liquid nitrogen evaporating system - Google Patents
waste heat recovery liquid nitrogen evaporating system Download PDFInfo
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- CN103775029B CN103775029B CN201210405314.0A CN201210405314A CN103775029B CN 103775029 B CN103775029 B CN 103775029B CN 201210405314 A CN201210405314 A CN 201210405314A CN 103775029 B CN103775029 B CN 103775029B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
Disclosed is a waste heat recovery liquid nitrogen evaporating system. The waste heat recovery liquid nitrogen evaporating system is used for overcoming the defect that existing heat recovery type liquid nitrogen evaporating systems cannot achieve effective control on the liquid nitrogen evaporating systems and accordingly cannot meet the production requirements. According to the waste heat recovery liquid nitrogen evaporating system, a power assembly, a waste heat recovery assembly, a heat energy compensating assembly and a liquid nitrogen evaporating assembly are sequentially connected through pipelines, and the outlet end of the a liquid nitrogen evaporator (19) of the liquid nitrogen evaporating assembly is communicated with the outlet end of a liquid nitrogen pump (4) of the power assembly; a control assembly comprises a core controller (21) and a man-machine interface (22), and the core controller (21) is connected with temperature measuring elements and control units in the power assembly, the waste heat recovery assembly, the heat energy compensating assembly and the liquid nitrogen evaporating assembly. The waste heat recovery liquid nitrogen evaporating system can heat liquid nitrogen through the waste heat recovery technology to fully recover the waste heat generated by an engine and improve the utilization rate of fuel and meanwhile is safe and reliable to meet the anti-explosion requirements of oil-gas wells.
Description
Technical field
The present invention relates to a kind of liquid nitrogen vaporization device of field of oil development, especially relate to a kind of waste heat recovery liquid nitrogen and steam
The system of sending out, belongs to nitrogen pressure break equipment during oil and gas development.
Background technology
During oil and gas development, application nitrogen technology is to oil well, oil reservoir is processed has peace compared with routine techniquess
Entirely, save time, fast, efficiently, success rate high the features such as.Nitrogen pressure break equipment is the important dress during natural petroleum gas field
Standby, its power source is diesel engine.The mechanical conversion efficiency of diesel engine is only 35%, and remaining 65% is converted into heat energy, mainly passes through
Radiator and exhaustor dissipate, and cause energy dissipation, also environment are adversely affected.
Low-temp low-pressure liquid nitrogen heating evaporation is needed to export for Room-temperature low-pressure nitrogen during nitrogen fracturing work.Liquid nitrogen vaporization master
Have direct-fired and non-direct-fired.With diesel oil as fuel, open firing evaporates liquid nitrogen to direct-fired vaporizer, and such device has liquid
Nitrogen evaporation discharge capacity is big, operating pressure is high, stable work in work the features such as, but its complex structure, at construction operation scene, fuel oil adds
Easily there is fire or blast in heat, there is potential safety hazard.
Non- direct-fired liquid nitrogen pump vehicle also known as heat reclamation type, using the coolant heat of electromotor, hydraulic system heat with send out
The heat of motivation tail gas provides heat to evaporate liquid evaporating liquid nitrogen, or by dedicated water brake system and motor exhaust
Nitrogen.Chinese utility model patent disclosed in 3 days November in 2010《Thermal recovery type liquid nitrogen evaporating system》（Publication number
CN201620835U）, it is made up of atomising device and heat-exchange device, the nozzle of atomising device and the heat-exchanging chamber of heat-exchange device
Inner chamber communicates；The compressed air hose of atomising device is fixedly connected with jet pipe, and the front end of jet pipe is nozzle, and the area of injection orifice of nozzle is little
Cross-sectional area in jet pipe；Siphonal one end is connected with compressed air hose, and the other end is located in water tank；The heat of heat-exchange device
There is steam vent switch room upper end.This device can effectively improve the thermal capacitance of heat-exchange device, improves the thermal efficiency.But this system is not
Effective control can be implemented it is impossible to meet production operation demand to liquid nitrogen vaporization system.
Content of the invention
In order to overcome existing thermal recovery type liquid nitrogen evaporating system can not implement effective control to liquid nitrogen vaporization system it is impossible to expire
The deficiency of sufficient production operation demand, the present invention provides a kind of waste heat recovery liquid nitrogen vaporization system.
The technical solution adopted for the present invention to solve the technical problems is：It is total that waste heat recovery liquid nitrogen vaporization system includes power
One-tenth, waste heat recovery assembly, thermal compensation assembly, liquid nitrogen vaporization assembly, power assembly, waste heat recovery assembly, thermal compensation assembly,
Liquid nitrogen vaporization assembly is sequentially connected by pipeline, and the liquid nitrogen evaporator arrival end that nitrogen evaporates assembly passes through pipeline and power assembly
The liquid nitrogen pump port of export connects；Assembly is controlled to include core controller and man machine interface, core controller is returned with power assembly, waste heat
Temperature element in receipts assembly, thermal compensation assembly, liquid nitrogen vaporization assembly, control device connect.
Power assembly is sequentially connected and is formed by electromotor, transfer case, hydraulic transmission gear box, liquid nitrogen pump, booster pump, liquid nitrogen container；
Electromotor is provided with temperature sensor.
Waste heat recovery assembly reclaims loop by Cooling Waste Heat of Engine, waste heat from tail gas reclaims loop and forms.Engine cool
The water tank in waste heat recovery loop is connected with circulation fluid water tank, three passages of distributing T-pipe regulating valve respectively with water tank, circulation fluid
Tank entry, the electromotor connection of power assembly；Circulation fluid water tank is provided with temperature sensor.Waste heat from tail gas reclaims loop by tail
Gas afterheat heat exchanger, exhaustor adjusting means, centrifugal pump composition.Circulation fluid water tank reclaims the waste heat from tail gas in loop with waste heat from tail gas
Heat exchanger, centrifugal pump connection；In waste heat from tail gas heat exchanger and the connecting pipeline of electromotor, exhaustor adjusting means is installed.
Thermal compensation assembly includes heat energy generator, charger.Heat energy generator is connected with the transfer case of power assembly；
Charger is arranged on the heat energy generator and the connecting pipeline and circulation fluid water tank between of thermal compensation assembly；Charger
In connecting pipeline and circulation fluid water tank between, temperature sensor is installed.
Liquid nitrogen vaporization assembly is made up of circulation fluid variable pump, liquid nitrogen evaporator.Liquid nitrogen evaporator and circulation fluid water tank, power
The liquid nitrogen pump connection of assembly；On liquid nitrogen evaporator and circulation fluid water tank connecting pipeline, circulation fluid variable pump is installed；Liquid nitrogen vaporization
Temperature sensor is provided with device.
The core controller controlling assembly is connected with 4 temperature sensors, adjusts with exhaustor adjusting means, distributing T-pipe
Valve, charger, circulation fluid variable pump connect, according to coiling temperature setup waste heat recovery liquid nitrogen vaporization system.
The invention has the beneficial effects as follows, heat liquid nitrogen using recovery waste heat technology, there is no naked light in whole process, safely may be used
Lean on, adapt to the requirement of explosion proof of Oil/gas Well；Fully reclaim electromotor and produce waste heat, improve the utilization ratio of fuel oil；There is temperature certainly
Dynamic defencive function, effective protection equipment, personal safety.
Brief description
Fig. 1 is waste heat recovery liquid nitrogen vaporization system architecture diagram of the present invention.
Fig. 2 is Control system architecture block diagram of the present invention.
In figure：1. electromotor, 2. transfer case, 3. hydraulic transmission gear box, 4. liquid nitrogen pump, 5. booster pump, 6. liquid nitrogen container, 7. tail gas
Afterheat heat exchanger, 8. exhaustor adjusting means, 9. water tank, 10. temperature sensor, 11. distributing T-pipe regulating valves, 12. temperature pass
Sensor, 13. circulation fluid water tanks, 14. centrifugal pumps, 15. heat energy generators, 16. chargers, 17. temperature sensors, 18. circulations
Liquid variable pump, 19. liquid nitrogen evaporators, 20. temperature sensors, 21. core controllers, 22. man machine interfaces.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.But, those skilled in the art should know
, the invention is not restricted to listed specific embodiment, as long as meeting the spirit of the present invention, all should be included in the present invention
Protection domain in.
Referring to accompanying drawing 1.Waste heat recovery liquid nitrogen vaporization system of the present invention, mends including power assembly, waste heat recovery assembly, heat energy
Repay assembly, liquid nitrogen vaporization assembly, control assembly, power assembly therein, waste heat recovery assembly, thermal compensation assembly, liquid nitrogen steam
Send out assembly to be sequentially connected by pipeline.
Liquid nitrogen evaporator 19 arrival end that nitrogen evaporates assembly is connected with liquid nitrogen pump 4 port of export of power assembly by pipeline.
Control assembly configuration core controller 21 and man machine interface 22, core controller 21 and power assembly, waste heat recovery assembly, heat energy
Temperature element in compensation assembly, liquid nitrogen vaporization assembly, control device connect.
Power assembly is sequentially connected by electromotor 1, transfer case 2, hydraulic transmission gear box 3, liquid nitrogen pump 4, booster pump 5, liquid nitrogen container 6
Composition.
Waste heat recovery assembly reclaims loop by Cooling Waste Heat of Engine, waste heat from tail gas reclaims loop and forms.Engine cool
Waste heat recovery loop includes water tank 9 and distributing T-pipe regulating valve 11.Water tank 9 is connected with circulation fluid water tank 13, and distributing T-pipe is adjusted
Three passages of valve 11 are connected with the electromotor 1 of water tank 9, circulation fluid water tank 13 entrance, power assembly respectively.Waste heat from tail gas reclaims
Loop is made up of waste heat from tail gas heat exchanger 7, exhaustor adjusting means 8, centrifugal pump 14；Circulation fluid water tank 13 is reclaimed with waste heat from tail gas
The waste heat from tail gas heat exchanger 7 in loop, centrifugal pump 14 connect；It is provided with waste heat from tail gas heat exchanger 7 and the connecting pipeline of electromotor 1
Exhaustor adjusting means 8.
Thermal compensation assembly includes heat energy generator 15, charger 16.Heat energy generator 15 and the transfer of power assembly
Case 2；Charger 16 is arranged on heat energy generator 15 and the connecting pipeline and circulation fluid water tank 13 between of thermal compensation assembly
On.
Liquid nitrogen vaporization assembly is made up of circulation fluid variable pump 18, liquid nitrogen evaporator 19.Liquid nitrogen evaporator 19 and circulation fluid water
Case 13, the liquid nitrogen pump 4 of power assembly connect；On liquid nitrogen evaporator 19 and circulation fluid water tank 13 connecting pipeline, circulation fluid change is installed
Amount pump 18.
Referring to accompanying drawing 2.Electromotor 1 is provided with temperature sensor 10, and circulation fluid water tank 13 is provided with temperature sensor 12, plus
Carry and temperature sensor 17 is provided with the connecting pipeline put between 16 and circulation fluid water tank 13；It is provided with liquid nitrogen evaporator 19
Temperature sensor 20.Control assembly core controller 21 be connected with above-mentioned 4 temperature sensors, with exhaustor adjusting means 8,
Distributing T-pipe regulating valve 11, charger 16, circulation fluid variable pump 18 connect, according to coiling temperature setup waste heat recovery liquid nitrogen vaporization
System.
The temperature controlling range that Cooling Waste Heat of Engine reclaims loop is 71～93 DEG C.Chilling temperature according to electromotor 1
Sensor 10, the measurement temperature of circulation fluid water tank temperature sensor 12, adjust the distributing T-pipe regulating valve of engine cooling circuit
11, distribution the temperature of electromotor 1 is remained to regulation temperature from electromotor 1 to the coolant rate of water tank 9, circulation fluid water tank 13
In the range of degree, and to greatest extent by heat collection in circulation fluid water tank 13.
The temperature controlling range that waste heat from tail gas reclaims loop is 38～71 DEG C.According to circulation fluid water tank temperature sensor 12
Measurement temperature, adjusts exhaustor adjusting means 8, and distribution exhaust flow directly empties and by the ratio of waste heat from tail gas heat exchanger 7,
And heat-shift is collected circulation fluid water tank 13 by centrifugal pump 14.
The heat energy generator 15 of thermal compensation assembly adopts water turbine form.This turbine mechanism through transfer case 2 with start
Machine 1 connects, and its effect is when waste heat recovery heat can not meet thermic load needed for liquid nitrogen vaporization, by charger 16 to send out
Motivation 1 is loaded, and the kinetic energy of electromotor 1 is changed into the heat energy of turbine mechanism medium, increases heat output.
The temperature controlling range of liquid nitrogen vaporization assembly is 38～71 DEG C.The heat of waste heat recovery assembly recovery, thermal compensation
High temperature circulation liquid, in circulation fluid water tank 13, is transported to liquid nitrogen by circulation fluid variable pump 18 and steams by the heat collection that assembly produces
Send out heating evaporation liquid nitrogen in device 19, liquid nitrogen is converted to gaseous state output（Temperature is measured by temperature sensor 20）, cold cycle liquid returns
Return circulation fluid water tank 13, start next circulation.
The core controller 21 controlling assembly adopts Siemens S7-224XP CN, configures TD400C man machine interface 22.Core
Controller 21 collecting temperature sensor measures temperature is simultaneously adjusted in time, keeps liquid nitrogen vaporization system heat load balance.Using tandem
The mode controlling, wherein liquid nitrogen vaporization assembly are controlled to master selector, and Cooling Waste Heat of Engine reclaims loop, waste heat from tail gas reclaims
Loop, thermal compensation assembly are controlled to secondary controller.
Waste heat recovery liquid nitrogen vaporization system work process of the present invention is as follows,
System works the initial stage, and opening liquid nitrogen container 6 makes liquid nitrogen enter the cold end of liquid nitrogen pump 4, carries out cold pump.After cold pump is abundant,
Electromotor 1 can be started and carry out infusion operation.Electromotor 1 drives transfer case 2, and transfer case 2 drives hydraulic transmission gear box 3 to drive liquid nitrogen pump
4, electromotor 1 power takeoff drives fluid motor-driven booster pump 5.Liquid nitrogen flows out intensified pump 5 from liquid nitrogen container 6 and is pressurized, to guarantee
The pressure of the suction side of output liquid nitrogen pump 4 is malleation.
After normal work, the liquid nitrogen in liquid nitrogen container 6 is exported in liquid nitrogen evaporator 19 by power assembly by liquid nitrogen pump 4.
, by heat collection in circulation fluid water tank 13, high temperature circulation liquid is through circulation fluid variable for waste heat recovery assembly, thermal compensation assembly
Pump 18 is transported in liquid nitrogen evaporator 19, and for heating evaporation liquid nitrogen, after liquid nitrogen heat absorption, gaseous state exports, and cold cycle liquid returns
Circulation fluid water tank 13.
In the course of the work, according to needed for liquid nitrogen vaporization, the size of thermic load, right respectively for waste heat recovery liquid nitrogen vaporization system
The Cooling Waste Heat of Engine of waste heat recovery assembly reclaims loop, waste heat from tail gas reclaims loop and is adjusted.At the work initial stage, liquid nitrogen steams
Thermic load needed for sending out is little, and waste heat from tail gas reclaims loop, the heat in Cooling Waste Heat of Engine recovery loop disclosure satisfy that demand；With
Thermic load increases, and starts thermal compensation assembly, by charger 16, electromotor 1 is loaded and be changed into the kinetic energy of electromotor 1
The heat energy of medium in heat energy generator 15, increases heat output, keeps system heat load balance.
Assembly is controlled to carry out on-line monitoring to work process, temperature sensor 10, temperature sensor 12, temperature in acquisition system
Degree sensor 17, the real time temperature of temperature sensor 20, and in time adjust distributing T-pipe regulating valve 11, exhaustor governor motion 8,
Load maintainer 16, circulation fluid variable pump 18 keep liquid nitrogen vaporization system heat load balance.
Waste heat recovery liquid nitrogen vaporization system of the present invention has the characteristics that：
1. utilize recovery waste heat technology to heat liquid nitrogen, in whole process, there is no naked light, safe and reliable, meet the anti-of Oil/gas Well
Quick-fried requirement.
2. abundant recovery electromotor produces waste heat, improves the utilization ratio of fuel oil；Adjust heat energy generator and compensate liquid nitrogen steaming
Send out required thermic load, adjust steadily, adapt to the violent operating mode of load variations in operation.
3. there is temperature automatic protection functions, effective protection equipment, personal safety.
It should be noted that above-described embodiment is exemplary rather than limiting the present invention, those skilled in the art are possible to design very
Many alternate embodiments are without deviating from the right of this patent.
Claims (1)
1. a kind of waste heat recovery liquid nitrogen vaporization system, steams including power assembly, waste heat recovery assembly, thermal compensation assembly, liquid nitrogen
Send out assembly, it is characterized in that：
Described power assembly, waste heat recovery assembly, thermal compensation assembly, liquid nitrogen vaporization assembly are sequentially connected by pipeline, nitrogen
The liquid nitrogen evaporator of evaporation assembly（19）Arrival end passes through the liquid nitrogen pump of pipeline and power assembly（4）The port of export connects；
Described power assembly is by electromotor（1）, transfer case（2）, hydraulic transmission gear box（3）, liquid nitrogen pump（4）, booster pump（5）, liquid nitrogen
Tank（6）It is sequentially connected composition；Electromotor（1）First temperature sensor is installed（10）；
Described waste heat recovery assembly reclaims loop by Cooling Waste Heat of Engine, waste heat from tail gas reclaims loop and forms；
Described Cooling Waste Heat of Engine reclaims loop and includes water tank（9）With distributing T-pipe regulating valve（11）；Water tank（9）With circulation fluid
Water tank（13）Connection, distributing T-pipe regulating valve（11）Three passages respectively with water tank（9）, circulation fluid water tank（13）Entrance, dynamic
The electromotor of power assembly（1）Connection；Circulation fluid water tank（13）Second temperature sensor is installed（12）；
Described waste heat from tail gas reclaims loop by waste heat from tail gas heat exchanger（7）, exhaustor adjusting means（8）, centrifugal pump（14）Composition；
Circulation fluid water tank（13）Reclaim the waste heat from tail gas heat exchanger in loop with waste heat from tail gas（7）, centrifugal pump（14）Connection；More than tail gas
Heat exchanger（7）With electromotor（1）Connecting pipeline on exhaustor adjusting means is installed（8）；
Described thermal compensation assembly includes heat energy generator（15）, charger（16）；Described heat energy generator（15）Using water
Power turbine type, described heat energy generator（15）By transfer case（2）With electromotor（1）Connect；Described charger（16）Peace
It is contained in the heat energy generator of thermal compensation assembly（15）And with circulation fluid water tank（13）Between connecting pipeline on, by load fill
Put（16）To electromotor（1）Loaded, made electromotor（1）Kinetic energy be changed into heat energy generator（15）Heat energy；Load dress
Put（16）With circulation fluid water tank（13）Between connecting pipeline on three-temperature sensor is installed（17）；
Described liquid nitrogen vaporization assembly is by circulation fluid variable pump（18）, liquid nitrogen evaporator（19）Composition；
Described liquid nitrogen evaporator（19）With circulation fluid water tank（13）, the liquid nitrogen pump of power assembly（4）Connection；Liquid nitrogen evaporator（19）
With circulation fluid water tank（13）Circulation fluid variable pump is provided with connecting pipeline（18）；
Described liquid nitrogen evaporator（19）On the 4th temperature sensor is installed（20）；
Assembly is controlled to include core controller（21）And man machine interface（22）, described core controller（21）With the first temperature sensing
Device（10）, second temperature sensor（12）, three-temperature sensor（17）, the 4th temperature sensor（20）Connect, with exhaustor
Adjusting means（8）, distributing T-pipe regulating valve（11）, charger（16）, circulation fluid variable pump（18）Connect；Described control assembly
Cooling Waste Heat of Engine is reclaimed the temperature control in loop at 71-93 DEG C, waste heat from tail gas is reclaimed the temperature control in loop in 38-
71 DEG C, by the temperature control of liquid nitrogen vaporization assembly at 38-71 DEG C.
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| CN201210405314.0A CN103775029B (en) | 2012-10-23 | 2012-10-23 | waste heat recovery liquid nitrogen evaporating system |
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| CN201210405314.0A CN103775029B (en) | 2012-10-23 | 2012-10-23 | waste heat recovery liquid nitrogen evaporating system |
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| CN103775029B true CN103775029B (en) | 2017-02-08 |
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| 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 |
| CN105736099A (en) * | 2016-04-07 | 2016-07-06 | 舟山巨洋技术开发有限公司 | Energy-saving system based on ship exhaust gas waste heat and liquid-nitrogen refrigeration |
| CN109032201B (en) * | 2017-06-09 | 2024-07-16 | 北京京仪自动化装备技术股份有限公司 | Temperature control equipment for semiconductor production |
| CN109882131A (en) * | 2019-03-15 | 2019-06-14 | 烟台杰瑞石油装备技术有限公司 | A kind of recuperation of heat liquid nitrogen vaporization system suitable for oil gas field |
| CN111206901A (en) * | 2020-01-19 | 2020-05-29 | 烟台杰瑞石油装备技术有限公司 | Nitrogen foam cement preparation device and preparation method thereof |
| CN114320657B (en) * | 2021-12-23 | 2023-08-15 | 烟台杰瑞石油装备技术有限公司 | Temperature control method for heat recovery liquid nitrogen |
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