CN104896875B - A kind of oil and gas retracting device and its automatic heat preserving control method - Google Patents
A kind of oil and gas retracting device and its automatic heat preserving control method Download PDFInfo
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- CN104896875B CN104896875B CN201510301340.2A CN201510301340A CN104896875B CN 104896875 B CN104896875 B CN 104896875B CN 201510301340 A CN201510301340 A CN 201510301340A CN 104896875 B CN104896875 B CN 104896875B
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Abstract
The invention discloses a kind of oil and gas retracting device and its automatic heat preserving control method, the oil and gas recovery unit includes evaporators at different levels and compressor at different levels, temperature sensor is provided with evaporators at different levels, and be connected respectively with the temperature sensor on compressors at different levels, evaporator at different levels provided with switch board, the switch board is according to the operations of the actual evaporation temperature control compressors at different levels for detecting evaporators at different levels in real time or stops controlling evaporator temperatures at different levels.The device structure is simple, easy to operate, and the deficiency of automatic heat preserving can not be realized in the petroleum vapor recovery compressor emergency shutdown stage by overcoming oil and gas retracting device in the prior art.
Description
Technical field
The present invention relates to oil and gas retracting device field, particularly a kind of oil and gas retracting device and its automatic heat preserving controlling party
Method.
Background technology
The oil and gas oil and gas that oil depot or the oil truck of petrochemical industry can be discharged in loading-unloading vehicle of recovery air-conditioning device and air it is mixed
Condensation and adsorption treatment of the compound (the abbreviation oil and gas in present specification) by oil and gas recovery air-conditioning device, by gasoline and air
It is completely separated, meanwhile, gasoline recovery is utilized and exhausts air to air.Therefore, oil and gas reclaims air-conditioning device in petrochemical plant
Or medium-and-large-sized oil depot or gas station are favourably welcome.But because the oil truck of oil depot or gas station or petrochemical plant is in loading-unloading vehicle
Time point and time length do not fix, the loading-unloading vehicle between oil truck and oil truck is also not necessarily continuous, causes oil and gas to reclaim
Air-conditioning device is often in a kind of working condition of discontinuously interval.As Application No. 200710079893.3 " one kind be used for oil
The Chinese invention patent application of the cryogenic refrigerating unit of gas recovery " discloses a kind of cryogenic refrigerating unit, including at least two sets systems
Cooling system, often covering refrigeration system includes compressor, condenser, expansion valve and evaporator, and the evaporator of the refrigeration system is in oil
Sequentially placed in feed channel, blast pipe is provided with after afterbody evaporator, cold energy reclamation device is serially connected with the blast pipe.Should
Device is handled oil and gas more by covering refrigeration system, makes the gentle separation of oil therein more thorough.But the device is in and stopped
During machine state, it is impossible to reach the effect of automatic heat preserving by own device, thus the device is on startup, needs certain time just may be used
Run to certain temperature.Further, since oil and gas arrival after oil and gas recovery air-conditioning device is entered meets the discharge mark of environmental administration
It is accurate, it is necessary to condensation process and last adsorption process Jing Guo Duo Ji, while only ensure that oil and gas in every one-level condensation process
During reached the relatively low evaporating temperature of desired design, oil and gas and air can be realized and are kept completely separate, otherwise discharged
Air into air will not reach the discharge standard of environmental administration.In temperature changing process, the cryogenic refrigeration dress of the patent
Put causes oil and gas to be completely separated because of evaporator temperature deficiency, and then causes non-compliant processing exhaust of oil to arrive
In air.
In Chinese literature《The use in conjunction of absorption process and absorption method Investigation of Petroleum Vapor Recovery Technology》（Zhang Xiangping, Liu Jiebo write, and refer to
《Petrochemical industry environmental protection》03 phase in 2006）In disclose the gas recovery system for oil of condensing and need to keep certain temperature
Words, that must be such that gas recovery system for oil continuously runs, and such method considerably increases the cost of investment and operating cost of equipment.
Or evaporators at different levels are incubated using ethylene glycol solution, but because the evaporator of oil vapor treatments at different levels requires the temperature of holding
Degree often -40 DEG C it is even lower, such as -70 DEG C, only maintain so low temperature evaporating temperature can just reach by oil and gas with
The purpose that air is sufficiently separated, but the viscosity of ethylene glycol solution at low temperature is very big, it is high in the concentration of -40 DEG C of ethylene glycol solutions
Up to 60%, if temperature is lower, concentration will be higher, cause the viscosity of ethylene glycol bigger, poor fluidity, be reached to insulation and carry out difficulty
And risk.Therefore, how to ensure to maintain expection per the evaporating temperature moment of one-level oil and gas processing in oil and gas recovery air-conditioning device
In the claimed range of design, technical barrier and the emphasis of the invention studied into current oil and gas recovery air-conditioning device.
The content of the invention
The present invention provides a kind of oil and gas retracting device and its automatic heat preserving control method, it is intended to overcomes oil and gas in the prior art
Retracting device can not realize automatic heat preserving, and insulating process is complicated, the low weak point of insulating efficiency.
The foregoing invention purpose of the present invention is accomplished by the following way：
A kind of oil gas air-conditioning retracting device, including petroleum vapor recovery unit, the petroleum vapor recovery unit include evaporators at different levels
With compressors at different levels, compressors at different levels are connected with the evaporator of corresponding level by refrigeration piping, are provided with evaporators at different levels
Temperature sensor, the switch board being connected respectively with temperature sensor, evaporator at different levels and compressor at different levels is further provided with, it is described
Switch board sets the upper limit with the evaporating temperature of evaporators at different levels and evaporating temperature is set according to the temperature for detecting evaporators at different levels in real time
Fix limit to compare, control the running or stopping of compressors at different levels, to control evaporator temperatures at different levels.
When compressor operates, evaporator is entered by pipeline by the liquid refrigerant after compression condensation in compressor, with
The oil gas entered in addition via pipeline is exchanged heat.Refrigerant evaporation endothermic, oil and gas are condensed heat release, realize gas-liquid point immediately
From.Refrigerant after heat exchange returns to compressor via pipeline, to carry out circulation next time.
Wherein, evaporators at different levels are also connected with oil storage tank, and the liquid oil through evaporation compressor condensation process at different levels is through pipeline
It is discharged into oil storage tank.
Evaporators at different levels are sequentially placed in oil-vapor pipe, and blast pipe is provided with after the evaporator of afterbody.Oil gas passes through
After petroleum vapor recovery unit condensation process, the gas for reaching atmospheric emission standard is discharged in air by blast pipe.
The control of the device for recovering oil and gas in petroleum vapor recovery compressor emergency shutdown in the following manner the unlatching to compressor with
Stopping is controlled：
Every a time detecting cycle, the actual evaporation temperature of every grade of evaporator and the setting of this grade of evaporator are evaporated
Temperature upper limit and evaporating temperature lower limit are compared;The actual evaporation temperature of every grade of evaporator is obtained by temperature sensor detection
Obtain and transfer data to switch board；
If the actual evaporation temperature of certain grade of evaporator>The evaporating temperature upper limit of this grade of evaporator, then switch board control the level
Compressor corresponding to evaporator is opened；
If the actual evaporation temperature of certain grade of evaporator<The evaporating temperature lower limit of this grade of evaporator, then switch board control the level
Compressor corresponding to evaporation compressor stops；
If the steaming of the evaporator of the actual evaporation temperature of the evaporator of the evaporating temperature lower limit of this grade of evaporator≤certain grade≤this grade
Temperature upper limit is sent out, then the compressor corresponding to this grade of evaporator keeps existing unlatching or halted state constant, that is, is originally out
State is opened, then is opening, is originally halted state, then is halted state.
What technical scheme was realized has the beneficial effect that：
（1）Opening for compressor corresponding to multi-stage evaporator is controlled by the cooperation of evaporating temperature sensor and switch board
Open or stop, it is ensured that being reclaimed the compressor emergency shutdown stage in oil and gas, the evaporator of every grade of oil and gas processing is in one's own steaming
Send out between temperature upper limit and evaporating temperature lower limit, ensure that whole oil and gas recovery unit can stand ready and handle oil and gas；Realize oil
The automatic heat preserving effect of recovery device for steam.
（2）A kind of oil and gas retracting device is simple in construction disclosed in technical solution of the present invention, and automatic heat preserving is simple to operate, ring
Protect, it is not necessary to which the heat preserving agent such as additional ethylene glycol or heat-preserving equipment are incubated to the evaporator in stopped status, and are kept away
Exempt from the temperature changing process after oil and gas recovery unit is opened, the drawbacks of oil and gas can not reach desired separated effect.
Brief description of the drawings
Fig. 1 is the structure chart of the oil and gas retracting device of the embodiment of the present invention 1；
Wherein, 1- oil and gas recovery unit, 2- evaporator temperature sensors, 3- first evaporators, 4- second level evaporator,
5- third evaporators, 6- compressors, 7- switch boards, 8- oil storage tanks, 9- blast pipes, 10- refrigeration pipings.
Embodiment
The present invention is made with reference to specific embodiment and further being elaborated, but embodiment is not done to the present invention
Any type of restriction.
Embodiment 1
If Fig. 1 is the structure chart of oil and gas retracting device of the present invention, the oil and gas retracting device includes the petroleum vapor recovery by forming
Unit 1, switch board 7, blast pipe 9, oil storage tank 8 and refrigeration piping 10, wherein, by first evaporator in petroleum vapor recovery unit 1
3, second level evaporator 4, third evaporator 5 and respectively corresponding to three-stage blower 6 form, evaporators at different levels are provided with temperature
Sensor 2, and be connected respectively with the temperature sensor 2 on compressors 6 at different levels, evaporator at different levels provided with switch board 7, three stage compression
Machine 6 is simultaneously corresponding to be connected with first evaporator 3, second level evaporator 4, third evaporator 5 by refrigeration piping 10.Work as pressure
When contracting machine 6 operates, entered after compressor 6 is by refrigerant expanded valve throttling of the compression condensation into liquid by refrigeration piping 10
Corresponding evaporator, the oil gas with separately entering via pipeline are exchanged heat.Evaporator inner refrigerant evaporation endothermic, in pipeline
Oil and gas is condensed heat release, realizes gas-liquid separation.Refrigerant after heat exchange returns to compressor 6 via refrigeration piping 10 and is compressed place
Reason, to carry out circulation next time.
Meanwhile oil storage tank 8 is connected with evaporators at different levels respectively by pipeline.Switch board 7 according to detection it is real-time first
Level evaporator 3, second level evaporator 4, the temperature of third evaporator 5 is to control corresponding compressor 6 to operate or stop, with control
Evaporator temperatures at different levels.
The oil and gas retracting device works in the following manner：
The evaporating temperature upper and lower bound that every grade of evaporator need to be kept is configured on switch board 7；Wherein the first order is steamed
The design temperature upper limit for sending out device 3 is 6 DEG C, and design temperature lower limit is 0 DEG C, and the design temperature upper limit of second level evaporator 4 is -25
DEG C, design temperature lower limit is -35 DEG C, and the design temperature upper limit of third evaporator 5 is -55 DEG C, and design temperature lower limit is -70
℃。
When petroleum vapor recovery unit 1 is shut down, switch board 7 detects the reality of every grade of evaporator by temperature sensor 2 in real time
Temperature, and compared with the evaporating temperature upper and lower bound that every grade of evaporator need to be kept；When detection temperature is evaporated higher than certain level
During the evaporating temperature upper limit that device need to be kept, the compressor 6 that switch board 7 automatically controls corresponding level is opened；When detection temperature is less than
During the evaporating temperature lower limit that certain grade of evaporator need to be kept, the compressor 6 that switch board 7 automatically controls corresponding level stops；Work as detection
For temperature in the range of the evaporating temperature upper and lower bound that certain grade of evaporator need to be kept, switch board 7 automatically controls corresponding level
Compressor（6）Keep original working condition, that is, be originally opening, be then opening, be originally halted state, then for
Halted state.
As switch board 7 detects that the real time temperature of certain moment evaporators at different levels is data below：The temperature of first evaporator 3
The temperature for spending the second level evaporator 4 for for -1 DEG C, being in halted state is -30 DEG C, and the temperature of third evaporator 5 is -50
DEG C, now, switch board 7 automatically controls the stopping of first order compressor, automatically controls high stage compressor stopping, third level compressor
Open, the technique effect of automatic heat preserving is shut down so as to realize the oil and gas retracting device in petroleum vapor recovery unit 1.
Following chart is the experimental data that an application example of the present application in the project of Hangzhou is drawn.
Oil and gas recovery unit 1 parameter be：Maximum oil and gas treating capacity：400 m3/h, unit 1 divide at three-level condensing refrigerant
Reason, wherein the design temperature upper limit of first evaporator 3 are 6 DEG C, and design temperature lower limit is 0 DEG C, second level evaporation compressor 4
The design temperature upper limit is -25 DEG C, and design temperature lower limit is -35 DEG C, and the design temperature upper limit of third level evaporation compressor 5 is -55
DEG C, design temperature lower limit is -70 DEG C.
Experimental data such as following table：
| Time point | Oil gas quantity | First order evaporating temperature | First order compressor state | Second level evaporating temperature | High stage compressor state | Third level evaporating temperature | Third level compressor state | Oil and gas concentration of emission |
| 9:30 | 400 m³/h | 0.5℃ | Operation | -33.5℃ | Operation | -65℃ | Operation | It is up to standard |
| 10:00 | 0 m³/h | 3.0℃ | Operation | -30.3℃ | Stop | -68.4℃ | Operation | / |
| 11:00 | 330 m³/h | 4.0℃ | Operation | -34.2℃ | Operation | -69.3℃ | Operation | It is up to standard |
| 12:00 | 200 m³/h | 3.5℃ | Operation | -29.5℃ | Operation | -63.2℃ | Operation | It is up to standard |
| 12:30 | 0 m³/h | 5.5℃ | Stop | -28.8℃ | Operation | -64.1℃ | Operation | / |
Find out from above experimental data, control method of the present invention is easy and effective reliable, it is possible to achieve oil and gas recovery unit exists
Insulation in shutdown and running, realize the target of emission compliance.
Claims (2)
1. a kind of oil and gas retracting device, including oil and gas recovery unit, the oil and gas recovery unit includes evaporators at different levels and at different levels
Compressor, the compressors at different levels are connected by refrigeration piping with the evaporator of corresponding level, it is characterised in that in evaporations at different levels
Device is provided with temperature sensor, and is connected respectively with the temperature sensor on compressors at different levels, evaporator at different levels provided with switch board,
The switch board according to the operation or stopping of the actual evaporation temperature control compressors at different levels of the evaporators at different levels detected in real time,
To control evaporator temperatures at different levels；
The evaporator includes first evaporator, second level evaporator and third evaporator；The setting of first evaporator
Temperature upper limit is 6 DEG C, and design temperature lower limit is 0 DEG C；The design temperature upper limit of second level evaporator is -25 DEG C, under design temperature
It is limited to -35 DEG C；The design temperature upper limit of third evaporator is -55 DEG C, and design temperature lower limit is -70 DEG C；
Evaporators at different levels are connected with oil storage tank respectively；The evaporator at different levels is sequentially placed in oil-vapor pipe, afterbody
Blast pipe is provided with after evaporator.
2. the control method of oil and gas retracting device according to claim 1, it is characterised in that every a time detecting week
Phase, the actual evaporation temperature of every grade of evaporator and the setting evaporating temperature upper limit and evaporating temperature lower limit of this grade of evaporator are carried out
Compare;The actual evaporation temperature of every grade of evaporator is detected by temperature sensor and obtains and transfer data to switch board；
If the actual evaporation temperature of certain grade of evaporator>The evaporating temperature upper limit of this grade of evaporator, then switch board control this grade evaporate
Compressor corresponding to device is opened；
If the actual evaporation temperature of certain grade of evaporator<The evaporating temperature lower limit of this grade of evaporator, then switch board control this grade evaporate
Compressor corresponding to device stops；
If the evaporation temperature of the evaporator of the actual evaporation temperature of the evaporator of the evaporating temperature lower limit of this grade of evaporator≤certain grade≤this grade
The upper limit is spent, then the compressor corresponding to this grade of evaporator keeps existing unlatching or halted state constant, that is, is originally opening state
State, then it is opening, is originally halted state, then is halted state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510301340.2A CN104896875B (en) | 2015-06-04 | 2015-06-04 | A kind of oil and gas retracting device and its automatic heat preserving control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510301340.2A CN104896875B (en) | 2015-06-04 | 2015-06-04 | A kind of oil and gas retracting device and its automatic heat preserving control method |
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| CN104896875B true CN104896875B (en) | 2018-01-19 |
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| CN110104602A (en) * | 2019-04-29 | 2019-08-09 | 东莞市盛源石油化工有限公司 | A kind of petroleum vapor recovery monitoring system and its monitoring method |
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| US7644595B2 (en) * | 2001-12-18 | 2010-01-12 | Fluor Technologies Corporation | Combined recovery of hydrogen and hydrocarbon liquids from hydrogen-containing gases |
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| CN102718178A (en) * | 2012-06-12 | 2012-10-10 | 佛山市海卓瑞流体控制工程有限公司 | Variable-frequency oil gas recovery control system of fuel dispenser |
| CN203464605U (en) * | 2013-08-19 | 2014-03-05 | 东营金辉环保科技有限公司 | Three-stage overlapped screw-type high-absorption copious cooling oil vapor recovery device |
| CN204665810U (en) * | 2015-06-04 | 2015-09-23 | 广东申菱空调设备有限公司 | A kind of oily recovery device for steam |
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2015
- 2015-06-04 CN CN201510301340.2A patent/CN104896875B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7644595B2 (en) * | 2001-12-18 | 2010-01-12 | Fluor Technologies Corporation | Combined recovery of hydrogen and hydrocarbon liquids from hydrogen-containing gases |
| CN101512253A (en) * | 2006-08-29 | 2009-08-19 | Bsh博世和西门子家用器具有限公司 | Refrigeration machine and operating method for it |
| KR100733770B1 (en) * | 2007-02-22 | 2007-07-02 | 강민식 | Apparatus for extracting oil from oil vapor |
| CN102295118A (en) * | 2011-07-29 | 2011-12-28 | 海湾石油设备（北京）有限公司 | Circulating type oil-gas vacuum adsorption and recovery system comprising crude-oil storage tank |
| CN102718178A (en) * | 2012-06-12 | 2012-10-10 | 佛山市海卓瑞流体控制工程有限公司 | Variable-frequency oil gas recovery control system of fuel dispenser |
| CN203464605U (en) * | 2013-08-19 | 2014-03-05 | 东营金辉环保科技有限公司 | Three-stage overlapped screw-type high-absorption copious cooling oil vapor recovery device |
| CN204665810U (en) * | 2015-06-04 | 2015-09-23 | 广东申菱空调设备有限公司 | A kind of oily recovery device for steam |
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| CN104896875A (en) | 2015-09-09 |
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| CB02 | Change of applicant information |
Address after: 528313 Shunde City, Foshan province Chencun town machinery and equipment Park, No. ten, No. Road, No. 8 Applicant after: Guangdong Shen Ling Environmental System Co., Ltd. Address before: 528313 Shunde City, Foshan province Chencun town machinery and equipment Park, No. ten, No. Road, No. 8 Applicant before: Guangdong Shenling Air Conditioning Equipment Co., Ltd. |
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Correction item: Name of applicant after change Correct: GUANGDONG SHENLING AIR-CONDITIONING EQUIPMENT CO., LTD. False: Guangdong Shen Ling Environmental System Co., Ltd. Number: 46 Volume: 31 |
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