CN103017481A - Low temperature condensing type oil gas recycling machine and operation method thereof - Google Patents
Low temperature condensing type oil gas recycling machine and operation method thereof Download PDFInfo
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- CN103017481A CN103017481A CN2012105460303A CN201210546030A CN103017481A CN 103017481 A CN103017481 A CN 103017481A CN 2012105460303 A CN2012105460303 A CN 2012105460303A CN 201210546030 A CN201210546030 A CN 201210546030A CN 103017481 A CN103017481 A CN 103017481A
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Abstract
The invention relates to a low temperature condensing type oil gas recycling machine and an operation method thereof. The low temperature condensing type oil gas recycling machine comprises a first stage refrigeration system, a second stage refrigeration system and a third stage refrigeration system, wherein the first stage refrigeration system mainly consists of a compressor, an air cold condenser, a heater, a thermostatic expansion valve and a shell tubular evaporator; the second stage refrigeration system mainly consists of a compressor, an air cold condenser, a thermostatic expansion valve, a fin tubular evaporator and an evaporation condenser; the third stage refrigeration system mainly consists of a compressor, an evaporation condenser, a thermostatic expansion valve and a fin tubular evaporator; and oil gas to be recycled passes through an electromagnetic valve, the shell tubular evaporator and the fin tubular evaporators of two stages in sequence through pipelines, and the waste gas is pumped out by an air pump. By adopting the three-stage refrigeration mode, the oil gas is gradually cooled to 80 DEG C below zero, is condensed and further subjected to oil gas recycling, so that the oil gas recycling efficiency is effectively ensured; and moreover a thermal recycling technique is adopted, so that system exhaust cooling capacity is recycled with an energy-saving operation effect.
Description
Technical field
The present invention relates to a kind of cryogenic condensation formula oil gas recycling machine and operation method thereof.
Background technology
Oil and product oil have the repeatedly link of loading and unloading in refining, accumulating, sales process, volatile organic hydrocarbon mixture under a large amount of normal temperature all can be volatilized or give off to each loading and unloading.The discharging of a large amount of organic hydrocarbon mixtures comprises economic loss, oil quality reduction, problem of environmental pollution, security hidden trouble except bringing massive losses and harm for enterprise and society.Therefore, at present one of oneself safety through becoming the world and being badly in need of solving of oil evaporation or emission problem, energy-saving and environmental protection difficult problem.Administer oil product evaporating loss, most economical effective method is to take the oil gas recovery measure to reclaim the hydrocarbon gas that gives off, thereby further reduces oil loss.
Summary of the invention
The object of the invention is to reclaim problem for oil gas, proposed a kind of cryogenic condensation formula oil gas recycling machine and operation method thereof.
The present invention, described cryogenic condensation formula oil gas recycling machine, comprise first order refrigeration system, second level refrigeration system and third level refrigeration system, the first compressor that first order refrigeration system is mainly connected successively by pipeline, air-cooled condenser, heater, the first heating power expansion valve and shell and tube evaporator form, the second compressor that second level refrigeration system is mainly connected successively by pipeline, air-cooled condenser, the second heating power expansion valve, the first finned tube evaporator and evaporative condenser form, the 3rd compressor that third level refrigeration system is mainly connected successively by pipeline, evaporative condenser, the 3rd heating power expansion valve and the second finned tube evaporator form, oil gas to be recycled passes through magnetic valve successively by pipeline, shell and tube evaporator, the first finned tube evaporator and the second finned tube evaporator, waste gas is extracted out by air pump, wherein: air-cooled condenser is double loop list blower fan air-cooled condenser, formed by first order refrigeration system condenser heat exchange coil and second level refrigeration system condenser heat exchange coil, its refrigerant loop is independent mutually, but both share 1 Fans; Evaporative condenser uses as condenser with respect to third level refrigeration system, and high temperature refrigerant gas section's heat release within it of being discharged by third level compressor is to second level refrigeration system, and cold-producing medium is condensed into liquid refrigerant.Then use as evaporimeter with respect to second level refrigeration system, from second level refrigeration system evaporator be fully evaporation gas-liquid two-phase attitude cold-producing medium within it section absorb condensation heat from third level refrigeration system, cold-producing medium is heated and flashed to hot gaseous.Therefore condenser/evaporator respectively as evaporimeter and condenser, therefore is called evaporative condenser for second level refrigeration system and third level refrigeration system.
The present invention, can be between magnetic valve and shell and tube evaporator, between shell and tube evaporator and the first finned tube evaporator, between the first finned tube evaporator and the second finned tube evaporator, be respectively equipped with case tube-type thermal recovery machine, the first fin tube type heat regenerator and the second fin tube type heat regenerator, waste gas is extracted out by air pump after the second fin tube type heat regenerator, the first fin tube type heat regenerator and case tube-type thermal recovery machine successively again.
The present invention, in case tube-type thermal recovery machine, shell and tube evaporator, the first fin tube type heat regenerator, the first finned tube evaporator, the second fin tube type heat regenerator and the second finned tube evaporator, the cold oil recovery tube is set respectively, and all cold oil recovery tubes compile with flowline and are connected.
The present invention, the operation method of described cryogenic condensation formula oil gas recycling machine comprises that system starts, normally moves and system closing, wherein:
When system starts, at first keep air pump to close, open magnetic valve, start first order refrigeration system, meanwhile, keep second level refrigeration system and third level refrigeration system to close, carrying out along with refrigeration, case tube-type thermal recovery machine, shell and tube evaporator, system's pipe fitting and oil gas are cooled gradually, when the oil gas temperature is reduced to 3 ℃ in the shell and tube evaporator, keep the unlatching of first order refrigeration system and third level refrigeration system to close, start second level refrigeration system, the first finned tube evaporator, system's pipe fitting and oil gas are cooled gradually, when oil gas temperature in the first finned tube evaporator is reduced to-30 ℃, keep the first order, second level refrigeration system is opened, and starts third level refrigeration system, the second finned tube evaporator, system's pipe fitting and oil gas are cooled gradually.When oil gas temperature in the second finned tube evaporator is reduced to-80 ℃, open air pump, system stable operation;
When system normally moves, magnetic valve, air pump, first order refrigeration system, second level refrigeration system and third level refrigeration system all are in opening, oil gas is cooled to-80 ℃ step by step from air inlet, and hydrocarbon compound wherein is condensed into step by step liquid according to the difference of its freezing point and discharges through oil-drain pipe;
During system closing, at first close air pump, shut electromagnetic valve then, and then close successively third level refrigeration system, second level refrigeration system and first order refrigeration system.
The present invention has following features:
(1) adopts the cold mode of three tier structure oil gas to be cooled to step by step-80 ℃ and carry out the condensed oil-gas recovery.In the system, the first order and second level refrigeration system have adopted the single-stage vapour compression refrigeration system.For third level superposition type vapour compression refrigeration system, in order to reduce system configuration, system selects second level refrigeration system as the one-level refrigeration system (high-temperature refrigeration system) of folding type cooling system;
(2) to reclaim high-solidification point organic hydrocarbon compound in order preventing and to solidify, adopt condensation heat that the organic hydrocarbon compound that reclaims is heated in first order refrigeration system, ensure that oil circuit is unimpeded; In addition, system has also adopted three grades of heat regenerators that the system exhaust cold is reclaimed, and has the energy-saving run effect;
(3) first order heat regenerator and evaporimeter are adopted shell and tube exchanger version, avoid effectively reclaiming that dust granule causes pipeline blockage in the oil gas;
(4) efficient for guaranteeing that oil gas reclaims reclaims needs for gas recovery system for oil according to oil gas and proposes the control method that a kind of refrigeration system starts step by step, has improved the reliability of system.In addition, in oil gas recycling machine system, the first order and second level refrigeration system share a condensation fan, have reduced the explosion-proof point of system, and then have strengthened Security of the system.
The present invention, its superiority effect is:
(1) adopts the cold mode of three tier structure oil gas to be cooled to step by step-80 ℃ and carry out condensation and then carry out the oil gas recovery, effectively guarantee the oil gas organic efficiency.Wherein, third level superposition type vapour compression refrigeration system has selected second level refrigeration system as its one-level refrigeration system (high-temperature refrigeration system), has simplified system, reduces system configuration, has reduced product cost;
(2) adopt condensation heat that recovery high-solidification point organic hydrocarbon compound is heated, avoid pipeline because the hydrocarbonylation thing solidifies to be caused stopping up, ensure that oil circuit is unimpeded; System has also adopted heat recovery technology to the system exhaust cold is reclaimed, and has the energy-saving run effect;
(3) first order heat regenerator and evaporimeter are adopted shell and tube exchanger version, avoid effectively reclaiming that dust granule causes pipeline blockage in the oil gas, improved the reliability of system;
(4) propose the strategy that control method that a kind of refrigeration system starts step by step and the first order and second level refrigeration system share a condensation fan, improved respectively the reliability of system and strengthened Security of the system.
Description of drawings
Fig. 1 is the structure principle chart of embodiment of the invention cryogenic condensation formula oil gas recycling machine.
Among the figure, the 1, first compressor; 2, the second compressor; 3, the 3rd compressor; 4, air-cooled condenser; 5, evaporative condenser; 6, heater; 7, the first heating power expansion valve; 8, the second heating power expansion valve; 9, the 3rd heating power expansion valve; 10, magnetic valve; 11, case tube-type thermal recovery machine; 12, shell and tube evaporator; 13, the first fin tube type heat regenerator; 14, the first finned tube evaporator; 15, the second fin tube type heat regenerator; 16, the second finned tube evaporator; 17, air pump; A, air inlet; B, fuel-displaced; C, exhaust.
The specific embodiment
With reference to Fig. 1, a kind of cryogenic condensation formula oil gas recycling machine, comprise first order refrigeration system, second level refrigeration system and third level refrigeration system, the first compressor 1 that first order refrigeration system is mainly connected successively by pipeline, air-cooled condenser 4, heater 6, the first heating power expansion valve 7 and shell and tube evaporator 12 form, the second compressor 2 that second level refrigeration system is mainly connected successively by pipeline, air-cooled condenser 4, the second heating power expansion valve 8, the first finned tube evaporator 14 and evaporative condenser 5 form, the 3rd compressor 3 that third level refrigeration system is mainly connected successively by pipeline, evaporative condenser 5, the 3rd heating power expansion valve 9 and the second finned tube evaporator 16 form, between magnetic valve 10 and shell and tube evaporator 12, between shell and tube evaporator 12 and the first finned tube evaporator 14, between the first finned tube evaporator 14 and the second finned tube evaporator 16, be respectively equipped with case tube-type thermal recovery machine 11, the first fin tube type heat regenerator 13 and the second fin tube type heat regenerator 15, oil gas to be recycled passes through magnetic valve 10 successively by pipeline, shell and tube evaporator 12, the first finned tube evaporator 14, the second finned tube evaporator 16, the second fin tube type heat regenerator 15, extracted out by air pump 17 again after the first fin tube type heat regenerator 13 and the case tube-type thermal recovery machine 11.In case tube-type thermal recovery machine 11, shell and tube evaporator 12, the first fin tube type heat regenerator 13, the first finned tube evaporator 14, the second fin tube type heat regenerator 15, the second finned tube evaporator 16, be respectively equipped with the cold oil recovery tube, all cold oil recovery tubes are connected with flowline.Wherein: air-cooled condenser 4 is double loop list blower fan air-cooled condenser, is comprised of first order refrigeration system condenser heat exchange coil and second level refrigeration system condenser heat exchange coil, and its refrigerant loop is independent mutually, but both share 1 Fans; Evaporative condenser 5 uses as condenser with respect to third level refrigeration system, and high temperature refrigerant gas section's heat release within it of being discharged by third level compressor is to second level refrigeration system, and cold-producing medium is condensed into liquid refrigerant.Then use as evaporimeter with respect to second level refrigeration system, from second level refrigeration system evaporator be fully evaporation gas-liquid two-phase attitude cold-producing medium within it section absorb condensation heat from third level refrigeration system, cold-producing medium is heated and flashed to hot gaseous.Therefore condenser/evaporator respectively as evaporimeter and condenser, therefore is called evaporative condenser for second level refrigeration system and third level refrigeration system.
Present embodiment, structural principle and the operation method of its cryogenic condensation formula oil gas recycling machine are as follows:
Refrigeration system
A, first order refrigeration system loop
Cold-producing medium is at first discharged through the first compressor 1 and is entered air-cooled condenser 4, passes through heater 6 be condensed into liquid state in air-cooled condenser 4 after again, further makes cold-producing medium excessively cold when finishing the heating of liquid towards hydrocarbonylation thing.Cross cold-producing medium after cold first heating power expansion valve 7 of flowing through and lowered the temperature into the gas-liquid two-phase state by reducing pressure by regulating flow, entering shell and tube evaporator 12 heat absorptions cools off oil gas again, this moment, cold-producing medium became superheated refrigerant by gas-liquid two-phase, and then was sucked by the first compressor.Finished thus the circulation of first order refrigeration system loop, as follows: the first compressor 1 → air-cooled condenser 4 → heater 6 → the first heating power expansion valves 7 → shell and tube evaporator 12 → the first compressors 1.
B, second level refrigeration system loop
Cold-producing medium is at first discharged through the second compressor 2 and is entered air-cooled condenser 4, is condensed into supercooled liquid in air-cooled condenser 4.Cross cold-producing medium after cold second heating power expansion valve 8 of flowing through and lowered the temperature into the gas-liquid two-phase state by reducing pressure by regulating flow, then entering 14 heat absorptions of the first finned tube evaporator cools off oil gas, enter again afterwards evaporative condenser 5, absorb the condensation heat to third level refrigeration system (being the two-stage system cooling system of folding type cooling system), this moment, cold-producing medium became superheated refrigerant by gas-liquid two-phase, and then was sucked by the second compressor 2.Finished thus the circulation of second level refrigeration system loop, as follows: the second compressor 2 → air-cooled condenser 4 → the second heating power expansion valves 8 → the first finned tube evaporators 14 → evaporative condenser 5 → the second compressors 2.
C, third level refrigeration system loop
Cold-producing medium is at first discharged through the 3rd compressor 3 and is entered evaporative condenser 5, and the condensation heat of third level refrigeration system (being the two-stage system cooling system of folding type cooling system) is disposed to second level refrigeration system became cold cold-producing medium.Cross cold-producing medium after cold the 3rd heating power expansion valve 9 of flowing through and lowered the temperature into the gas-liquid two-phase state by reducing pressure by regulating flow, then entering 16 heat absorptions of the second finned tube evaporator cools off oil gas, this moment, cold-producing medium became superheated refrigerant by gas-liquid two-phase, and then was sucked by the 3rd compressor 3.Finished thus the circulation of third level refrigeration system loop, as follows: the 3rd compressor 3 → evaporative condenser 5 → the 3rd heating power expansion valves 9 → the second finned tube evaporators 16 → the 3rd compressor 3.
Petroleum system
When system moves, oil gas A to be recycled at first passes through magnetic valve 10, enter case tube-type thermal recovery machine 11, then carry out the recovery that exchange heat is finished cold with the exhaust from the first fin tube type heat regenerator 13, the hydrocarbon compound that wherein the set point temperature is higher is condensed.Afterwards, oil gas enters shell and tube evaporator 12 and cold-producing medium again to carry out heat exchange and is condensed, and then enter the first fin tube type heat regenerator 13 with from the second fin tube type heat regenerator 15 exhausts carry out the recovery that exchange heat is finished cold, the hydrocarbon compound that wherein the set point temperature is higher is condensed again.Then, oil gas enters the first finned tube evaporator 14 and cold-producing medium again to carry out heat exchange and is condensed, enter again the second fin tube type heat regenerator 15 with from the second finned tube evaporator 16 exhausts carry out the recovery that exchange heat is finished cold, and then enter the second finned tube evaporator 16.Finish thus oil gas and reclaim circulation, as follows: air feed A → magnetic valve 10 → case tube-type thermal recovery machine 11 → shell and tube evaporator 12 → the first fin tube type heat regenerators 13 → the first finned tube evaporators 14 → the second fin tube type heat regenerators 15 → the second finned tube evaporators 16 → the second fin tube type heat regenerators 15 → the first fin tube type heat regenerators 13 → case tube-type thermal recovery machine 11 → air pump 17 → exhaust C.Wherein, the hydrocarbon compound in the oil gas is condensed into step by step liquid B according to the difference of its freezing point and discharges through oil-drain pipe.
System operation method
A, system starts: when system starts, at first keep air pump 17 to close, open magnetic valve 10, start first order refrigeration system, meanwhile, keep second level refrigeration system and third level refrigeration system to close, carrying out along with refrigeration, shell and tube evaporator 12, system's pipe fitting and oil gas are cooled gradually, when shell and tube evaporator 12 interior oil gas temperature are reduced to 3 ℃, keep the unlatching of first order refrigeration system and third level refrigeration system to close, start second level refrigeration system, the first finned tube evaporator 14, system's pipe fitting and oil gas are cooled gradually, when the first finned tube evaporator 14 interior oil gas temperature are reduced to-30 ℃, keep the first order, second level refrigeration system is opened, and starts third level refrigeration system, the second finned tube evaporator 16, system's pipe fitting and oil gas are cooled gradually.When the second finned tube evaporator 16 interior oil gas temperature are reduced to-80 ℃, open air pump 17, system stable operation;
B, system normally move: when system normally moves, magnetic valve 10, air pump 17, first order refrigeration system, second level refrigeration system and third level refrigeration system all are in opening, oil gas is cooled to-80 ℃ step by step from air inlet, and hydrocarbon compound wherein is condensed into step by step liquid according to the difference of its freezing point and discharges through oil-drain pipe;
C, system closing: during system closing, at first close air pump 17, then shut electromagnetic valve 10, and then close successively third level refrigeration system, second level refrigeration system and first order refrigeration system.
Claims (4)
1. cryogenic condensation formula oil gas recycling machine, it is characterized in that: comprise first order refrigeration system, second level refrigeration system and third level refrigeration system, the first compressor (1) that first order refrigeration system is mainly connected successively by pipeline, air-cooled condenser (4), heater (6), the first heating power expansion valve (7) and shell and tube evaporator (12) form, the second compressor (2) that second level refrigeration system is mainly connected successively by pipeline, air-cooled condenser (4), the second heating power expansion valve (8), the first finned tube evaporator (14) and evaporative condenser (5) form, the 3rd compressor (3) that third level refrigeration system is mainly connected successively by pipeline, evaporative condenser (5), the 3rd heating power expansion valve (9) and the second finned tube evaporator (16) form, wherein: air-cooled condenser (4) is double loop list blower fan air-cooled condenser, oil gas to be recycled passes through magnetic valve (10) successively by pipeline, shell and tube evaporator (12), the first finned tube evaporator (14) and the second finned tube evaporator (16), waste gas (C) is extracted out by air pump (17).
2. cryogenic condensation formula oil gas recycling machine according to claim 1, it is characterized in that: between magnetic valve (10) and shell and tube evaporator (12), between shell and tube evaporator (12) and the first finned tube evaporator (14), between the first finned tube evaporator (14) and the second finned tube evaporator (16), be respectively equipped with case tube-type thermal recovery machine (11), the first fin tube type heat regenerator (13) and the second fin tube type heat regenerator (15), waste gas are successively through the second fin tube type heat regenerator (15), the first fin tube type heat regenerator (13) and case tube-type thermal recovery machine (11) are extracted out by air pump (17) afterwards again.
3. cryogenic condensation formula oil gas recycling machine according to claim 2, it is characterized in that: in case tube-type thermal recovery machine (11), shell and tube evaporator (12), the first fin tube type heat regenerator (13), the first finned tube evaporator (14), the second fin tube type heat regenerator (15), the second finned tube evaporator (16), be respectively equipped with the cold oil recovery tube, all cold oil recovery tubes are connected with flowline.
4. the operation method of each described cryogenic condensation formula oil gas recycling machine comprises that system starts, normally moves and system closing according to claim 1-3, wherein:
When system starts, at first keep air pump (17) to close, open magnetic valve (10), start first order refrigeration system, meanwhile, keep second level refrigeration system and third level refrigeration system to close, carrying out along with refrigeration, shell and tube evaporator (12), system's pipe fitting and oil gas are cooled gradually, when the oil gas temperature is reduced to 3 ℃ in the shell and tube evaporator (12), keep the unlatching of first order refrigeration system and third level refrigeration system to close, start second level refrigeration system, the first finned tube evaporator (14), system's pipe fitting and oil gas are cooled gradually, when the oil gas temperature is reduced to-30 ℃ in the first finned tube evaporator (14), keep the first order, second level refrigeration system is opened, start third level refrigeration system, the second finned tube evaporator (16), system's pipe fitting and oil gas are cooled gradually, when the oil gas temperature is reduced to-80 ℃ in the second finned tube evaporator (16), open air pump (17), system stable operation;
When system normally moves, magnetic valve (10), air pump (17), first order refrigeration system, second level refrigeration system and third level refrigeration system all are in opening, oil gas is cooled to-80 ℃ step by step from air inlet, and hydrocarbon compound wherein is condensed into step by step liquid according to the difference of its freezing point and discharges through oil-drain pipe;
During system closing, at first close air pump (17), shut electromagnetic valve (10) then, and then close successively third level refrigeration system, second level refrigeration system and first order refrigeration system.
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| CN108211648A (en) * | 2018-02-08 | 2018-06-29 | 广东申菱环境系统股份有限公司 | Heat reclamation type condenses and alternating temperature pressure-variable adsorption group technology device for recovering oil and gas |
| CN111595048A (en) * | 2020-06-28 | 2020-08-28 | 郑州永邦电气有限公司 | Oil gas recovery condensing unit |
| CN111876192A (en) * | 2020-07-23 | 2020-11-03 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Absorption self-overlapping condensation combined type oil gas recovery system and recovery method |
| CN113483412A (en) * | 2021-06-21 | 2021-10-08 | 清华大学 | Multi-mode water-fluorine multi-split air conditioner system |
| CN113607448A (en) * | 2021-07-19 | 2021-11-05 | 江苏科技大学 | Heat exchanger performance test bed for oil gas liquefaction recovery and test method thereof |
| CN114608212A (en) * | 2022-02-25 | 2022-06-10 | 南通亚泰工程技术有限公司 | Cascade refrigerating plant |
| CN114984606A (en) * | 2022-05-13 | 2022-09-02 | 浙江劳达制冷科技有限公司 | Low temperature unit is retrieved in waste gas condensation |
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| CN113483412B (en) * | 2021-06-21 | 2022-04-15 | 清华大学 | Multi-mode water-fluorine multi-split air conditioner system |
| CN113607448A (en) * | 2021-07-19 | 2021-11-05 | 江苏科技大学 | Heat exchanger performance test bed for oil gas liquefaction recovery and test method thereof |
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| CN114984606A (en) * | 2022-05-13 | 2022-09-02 | 浙江劳达制冷科技有限公司 | Low temperature unit is retrieved in waste gas condensation |
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Application publication date: 20130403 |