CN105080278B - Oil-gas recovery method - Google Patents
Oil-gas recovery method Download PDFInfo
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Abstract
The present invention relates to a kind of oil-gas recovery method, mainly solve the problems, such as in the prior art cannot qualified discharge, energy consumption it is higher.The present invention is by using a kind of oil-gas recovery method, including adsorption system, desorption system, condenser system and low-temperature catalytic oxidation system, tail gas feed line is connected with each adsorption tanks gas inlet pipeline, adsorption tanks offgas outlet pipeline is connected with low-temperature catalytic oxidation system, adsorption tanks desorption outlet line is connected with two screw vacuum unit inlets, and screw vacuum machine set outlet is connected with condenser system；The condenser system includes condensation unit chilldown system, multi-stage refrigerating heat exchanger, and condenser system outlet is connected with waste liquid tank, low-temperature catalytic oxidation system entry respectively；The low-temperature catalytic oxidation system includes heater, low temperature catalyst bed, high temperature catalyst bed, heat pipe ceramic heat exchanger, and the technical scheme that low-temperature catalytic oxidation system outlet is connected with chimney preferably solves above mentioned problem, can be used in vent gas treatment.
Description
Technical field
The present invention relates to a kind of oil-gas recovery method.
Background technology
Gasoline, benzene class and boat coal can produce substantial amounts of organic gas during shipment, not only cause energy waste, and
And pollution environment, therefore this kind of gas is recycled, with the letter that the regulation of national standard is more and more stricter, traditional
Single process combination can not meet the requirement of harshness, therefore a kind of " circulation absorption+condensation+low-temperature catalytic oxidation " petroleum vapor recovery of invention
Method, disclosure satisfy that NMHC is less than 120mg/m3, benzene is less than 2mg/m3.Crude oil is mentioned in patent 201310234691.7
Shipment oil-gas recovery method, its main technological route is " two-step desulfurization system+two-stage absorption+low temperature absorption ", does not embody low temperature
Catalysis oxidation, export targets are difficult to meet benzene less than 2mg/m3, if it is desired to meet above index, then need increasing energy consumption.Patent
201320584179.0 mention a kind of harbour device for recovering oil and gas, its only with cryogenic condensation method, compared with this patent,
It is high with discharge index, the characteristics of energy consumption is big.Patent 201420384177.1 is mentioned at a kind of harbour sour crude petroleum vapor recovery
Reason system, its technology path is " desulfurization+two-stage absorption+compression condensation+fuel recovery ", and it is directly discharged by charcoal canister,
It is suitable only for processing the occasion of NMHC, if treatment benzene class steam, it is impossible to up to standard
The present invention targetedly solves the problem.
The content of the invention
The technical problems to be solved by the invention are in the prior art cannot qualified discharge, energy consumption problem higher, there is provided
A kind of new oil-gas recovery method.The method is used in vent gas treatment, has the advantages that qualified discharge, energy consumption are relatively low.
To solve the above problems, the technical solution adopted by the present invention is as follows：A kind of oil-gas recovery method, using petroleum vapor recovery
Device reclaim terminal ship during oil gas, the device for recovering oil and gas include adsorption system, desorption system, condenser system and
Low-temperature catalytic oxidation system, the adsorption system includes four adsorption tanks, tail gas feed line and each adsorption tanks gas inlet pipe
Line is connected, and adsorption tanks offgas outlet pipeline is connected with low-temperature catalytic oxidation system, adsorption tanks desorption outlet line and two screw rods
Vacuum pump set entrance is connected, and screw vacuum machine set outlet is connected with condenser system；The condenser system includes condensation unit precooling
System, multi-stage refrigerating heat exchanger, condenser system outlet are connected with waste liquid tank, low-temperature catalytic oxidation system entry respectively；It is described low
Warm catalytic oxidation system includes heater, low temperature catalyst bed, high temperature catalyst bed, heat pipe ceramic heat exchanger, low-temperature catalytic oxidation system
System outlet is connected with chimney；During terminal ship, the gas of volatilization is incorporated into tail gas and is returned by ship-to-shore docking system by blower fan
Receiving apparatus, control the rotating speed of blower fan equipped with micro-pressure sensor in every vapor delivery line；Adsorption tanks are built with activated carbon, organic gas
It is adsorbed by activated carbon, the gas after filtering enters low-temperature catalytic oxidation system, is further processed, and gas up to standard is straight
Run in and put；When some adsorption tanks adsorption saturation, two vacuum pump sets start simultaneously, the organic gas after desorption enters condensed system
System is condensed, and the liquid of condensation is reclaimed into waste liquid tank, and the gas not being condensed enters low-temperature catalytic oxidation system；Inhale
Attached tail gas and the gas not being condensed initially enter the pretreatment system of low-temperature catalytic oxidation, mixed gas are diluted to quick-fried
Less than the 25% of fried lower limit, by the effect of air-introduced machine, is introduced into the heating chamber of heater, and by heat pipe ceramic heat exchanger
Exchanged heat with the gas for being treated through high-temperature S removal before, the gas after heat exchange is carried out by two-stage catalysis oxidation bed
Conversion, air is entered through the gas up to standard after treatment through chimney.
In above-mentioned technical proposal, it is preferable that the tail gas feed line is provided with surge tank.
In above-mentioned technical proposal, it is preferable that after the adsorption tanks offgas outlet pipeline is connected with condenser system outlet line
It is connected with oil pump inlet, fuel pump outlet is connected with low-temperature catalytic oxidation system.
In above-mentioned technical proposal, it is preferable that the vacuum pump set uses VFC, and the cooling of vacuum pump set is by cooling tower
The circulating water cooling system supply of offer.
In above-mentioned technical proposal, it is preferable that the condenser system includes three-level refrigerated heat exchanger.
In above-mentioned technical proposal, it is preferable that four adsorption tanks are parallel connection.
In above-mentioned technical proposal, it is preferable that the tail gas feed line is connected with chimney entrance.
Oil-gas recovery method of the present invention, for reclaiming the oil gas, the benzene class steam that are produced during many terminal ships
And the organic gas such as coal steam that navigate.The process route for using for：Many adsorption tanks circulation absorptions, double vavuum pump desorptions, multi-stage mechanical
Condensation, low-temperature catalytic oxidation.During terminal ship, the gas of volatilization is incorporated into tail gas by ship-to-shore docking system by blower fan
Retracting device, controls the rotating speed of blower fan equipped with micro-pressure sensor in every vapor delivery line, prevent cabin pressure change too big.
Adsorption system includes four charcoal canisters, 12 electrically operated valves, four magnetic valves and corresponding measuring instrumentss etc..
Vacuum desorption system includes two sets of screw vacuum units, circulating cooling system etc..Multi-stage mechanical condenser system includes compressor, swollen
Swollen valve, air-cooled condenser, oil gas condensation special evaporator, oil eliminator etc., and be double evaporators structure.Low-temperature catalytic oxidation
System includes pretreatment system, high/low temperature catalyst bed, thermal storage ceramic, heat exchanger, on-line analysis instrument etc..
Charcoal canister is adsorbed built with activated carbon, organic gas by charcoal canister, and the gas after filtering enters
Low-temperature catalytic oxidation system, is further processed, and gas up to standard is directly discharged.Four charcoal canister circulation absorptions, it is used in parallel,
When one of them absorption when, the other three or desorption, or wait, recycle canister advantage be can be very
Organic gas desorb in short time, and desorption is very thorough.Charcoal canister is used alternatingly by corresponding motor-driven valve
The opening and closing of door are realized.When some charcoal canister adsorption saturation, two vacuum pump sets start simultaneously, organic after desorption
Gas is condensed into multi-stage condensing device, according to the difference of each material freezing point, liquid is condensed into respectively, is returned
Waste liquid tank is reclaimed, and for the liquid for preventing discharge solidifies, waste liquid tank is warmed to above zero, is sent to outside device.It is not cold
Enter low-temperature catalytic oxidation system together with the gas that solidifying a small amount of gas is discharged with charcoal canister, processed, initially enter low
Mixed gas are diluted to less than the 25% of LEL by the pretreatment system of warm catalysis oxidation, by the effect of air-introduced machine, will
It introduces heating chamber, and is exchanged heat with the gas for being treated through high-temperature S removal before by the ware that exchanges heat.After heat exchange
Gas converted by two-stage catalysis oxidation bed, enter air through the gas up to standard after treatment.Vacuum pump set is using change
Frequency is controlled, and prevents initial start stage air quantity excessive and charcoal bed and condensation unit are impacted.The cooling of vacuum pump set is by cooling tower
The circulating water cooling system supply of offer.Due to containing benzene in recovery material, package unit is carried out at electric tracing and insulation
Reason.
This patent provides the oil-gas recovery method of a kind of " circulation absorption+condensation+low-temperature catalytic oxidation ", can process multi-code
The different organic gas that head is volatilized when loading onto ship simultaneously, meets newest national standard and Industry code requirements, and non-methane is total
Hydrocarbon≤120mg/m3, clearance >=97%, benzene≤2mg/m3, and energy consumption is relatively low, achieves preferable technique effect.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of device of the present invention.
1- blower fans A；2- micro-pressure sensors A；3- electrically operated valves A；4- blower fans B；5- micro-pressure sensors B；6- electrically operated valves B；
7- blower fans C；8- micro-pressure sensors C；9- electrically operated valves C；10- surge tanks；11- adsorption tanks A；12- adsorption tanks B；13- adsorption tanks C；
14- adsorption tanks D；15- adsorption tanks A magnetic valves；16- adsorption tanks B magnetic valves；17- adsorption tanks C magnetic valves；18- adsorption tanks D electromagnetism
Valve；19- adsorption tanks A atmospheric valves；20- adsorption tanks B atmospheric valves；21- adsorption tanks C atmospheric valves；22- adsorption tanks D atmospheric valves；23- inhales
Attached tank A intake valves；24- adsorption tanks B intake valves；25- adsorption tanks C intake valves；26- adsorption tanks D intake valves；27- adsorption tanks A regenerates
Valve；28- adsorption tanks B regeneration valves；29- adsorption tanks C regeneration valves；30- adsorption tanks D regeneration valves；31- switching valves；32- vacuum pump sets A；
33- vacuum pump sets B；34- condenses unit chilldown system；35- one-levels are freezed；36- two-stage systems are cold；37- three-levels are freezed；38- liquid levels
Meter；39- waste liquid tanks；40- oil pumps；41- air-introduced machines；The online concentration meters of 42-；43- inlet temperature meters；44- heaters；45- low temperature
Catalyst bed；46- high temperature catalyst beds；47- heat pipe ceramic heat exchangers；48- chimneys.
Below by embodiment, the invention will be further elaborated, but is not limited only to the present embodiment.
Specific embodiment
【Embodiment 1】
As shown in figure 1, " circulation absorption+condensation+low-temperature catalytic oxidation " oil-gas recovery method provided using the present invention, oil
Gas recovering device is by four charcoal canisters, two vacuum pump sets, multi-stage condensing unit, low-temperature catalytic oxidation device, surge tank, useless
Flow container and correlate meter valve etc. are constituted.
The organic gas that each terminal ship is produced enters oil by blower fan A, blower fan B, blower fan C through tail gas feed line respectively
Gas recovery method, the rotating speed of each blower fan is adjusted by micro-pressure sensor A, micro-pressure sensor B, micro-pressure sensor C, prevents cabin pressure
Power is too high or too low.Electrically operated valve A, electrically operated valve B, electrically operated valve C are prevented from mutual flushing between different material.It is electronic
The open and close of valve are controlled by blower fan start stop signal.
First by surge tank 10, a small amount of liquid is condensed out and enters surge tank organic gas, and organic gas enters to be inhaled
Attached tank A, intake valve 23 is opened, and atmospheric valve 19 is opened, remaining valve closing, after adsorption tanks A adsorption saturations, while starting vacuum
Unit 32, vacuum pump set 33 carries out vacuum action to adsorption tanks A, and now electrically operated valve 23, electrically operated valve 19 are closed, electronic
Valve 27 is opened.The electrically operated valve 24 of adsorption tanks B, electrically operated valve 20 are opened simultaneously, and gas is adsorbed into adsorption tanks B.Inhale
The high concentration organic gas temperature that attached tank A is desorbed by vacuum pump set will be introduced into condensation unit pre- more than 80 DEG C
Cooling system 34, normal temperature is dropped to by the recirculated water for condensing unit chilldown system by gas, regenerates latter stage, opens magnetic valve 15, is drawn
Enter nitrogen purging charcoal bed, be beneficial to desorption thorough.High from vacuum pump set gas concentration out, temperature is high, is unfavorable for freezing machine
The steady operation of group, therefore first pass through recirculated water gas temperature is dropped into normal temperature, the gas by precooling freezes into one-level, and one
At 5 DEG C or so, three benzene hydrocarbon gases and vapor are condensed the temperature of level refrigeration, and remaining gas is cold into two-stage system, and two
The temperature of level refrigeration is about -40 DEG C, and triphen class is substantially all to be condensed, and most hydro carbons is also condensed, finally
It is minimum to condense to -75 DEG C into three-level refrigeration, by after multi-stage condensing, it is most of it is organic be condensed, liquid temporarily enters
Waste liquid tank 39 is stored, and has far transmission level meter 38 on waste liquid tank 39, can with gauging level, when reaching certain yield,
Returned to tank field through oil pump 40.Condensation unit uses double evaporators structure design, prevents the situation for coagulating frost, a whole set of dress of influence
Put normal operation.
After the gas mixing not being condensed with condensation unit from adsorption tanks light concentration gas out, by air-introduced machine 41
Low-temperature catalytic oxidation system is introduced, by the way of low temperature catalyst, ignition temperature is less than 300 DEG C, and the air quantity of air-introduced machine is by entering for it
The temperature of mouthful thermometer 43 is controlled, and heating chamber 44 is set in catalytic oxidation system, starts heater, into inner loop, when
When hot gas source reaches catalysis ignition temperature requirement, low-temperature catalyzed catalyst 45 and high-temperature catalytic catalyst 46 are catalyzed to organic substance
Decompose, while giving off energy.The heat energy for being catalyzed burning can carry out heat exchange by the waste gas of 47 pairs of entrance of heat-exchange device, this
When heater be stopped completely, organic exhaust gas maintain the spontaneous combustion, circulation to carry out in catalytic combustor, and machine is stopped until next time
Catalysis ignition temperature is not reached when requiring, heater is again turned on.Online concentration analyzer 42 is dense for monitoring supplied materials gas
Degree, catalysis oxidation front reaction concentration and outlet concentration, chimney 48 are mainly used in emission compliance gas and plant failure
When direct discharge gas.
Within the time of setting, adsorption tanks A desorptions are finished, at the same adsorption tanks B adsorption saturations, electrically operated valve automatic switchover,
Organic gas is adsorbed into adsorption tanks C, and adsorption tanks B is regenerated, adsorption tanks C adsorption saturations, is regenerated, and gas enters
Adsorption tanks D, and so on.
Which adsorption tanks is system can enter according to the amount intelligent decision organic gas of shipment simultaneously, start several vacuum machines
Group.When temperature is less than 15 degree, to prevent benzene class from blocking is condensed in system, starts electric tracer heating system and device is incubated.
The organic steam mean concentration generally 20%VOL volatilized during terminal ship, mass concentration is about
600g/m3, the non-methane hydrocarbon emission concentration≤80mg/m after being processed through device3, benzene concentration of emission≤2mg/m3, tail gas recycle
The treatment effeciency of device is 99.9%, according to the GB31571-2015 of newest promulgation《Petro chemical industry pollutant emission standard》
Regulation, Air Pollutant Emission limit value, removal efficiency >=97% of NMHC in other organic exhaust gas, the discharge value of benzene
≤4mg/m3.If not increasing low-temperature catalytic oxidation device, above-mentioned discharge index is reached, energy consumption needs to increase by more than 50%.
【Comparative example】
Existing patented technology, if only with the combined method of absorption method, condensation method, absorption process or a few persons, shortcoming exists
Very big in the energy consumption of condensation method, it is desirable to reach the requirement of new national standard, energy consumption at least increases by more than 50%；If oil gas is by absorption
Method is discharged into air, and benzene is extremely difficult to 4mg/m3Emission limit；The method of existing catalysis burning, can reach GB
Requirement, but due to catalysis burning temperature it is higher, certain potential safety hazard can be brought, this patent is in previous process flow
Low-temperature catalytic oxidation method is increased, control maximum temperature is no more than 400 DEG C, and prime condensation method power can be reduced to list
Solely use the 1/2 of condensation method.
Obviously, the oil-gas recovery method of " circulation absorption+condensation+low-temperature catalytic oxidation " that this patent is provided, can be processed
The different organic gas that many harbours are volatilized when loading onto ship simultaneously, meets newest national standard and Industry code requirements, non-first
Alkane total hydrocarbon≤120mg/m3, clearance >=97%, benzene≤2mg/m3, and energy consumption is relatively low, achieves preferable technique effect.
Claims (1)
1. a kind of oil-gas recovery method, the oil gas during terminal ship, the petroleum vapor recovery are reclaimed using device for recovering oil and gas
Device includes adsorption system, desorption system, condenser system and low-temperature catalytic oxidation system, and the adsorption system includes four absorption
Tank, tail gas feed line is connected with each adsorption tanks gas inlet pipeline, adsorption tanks offgas outlet pipeline and low-temperature catalytic oxidation system
System is connected, and adsorption tanks desorption outlet line is connected with two screw vacuum unit inlets, screw vacuum machine set outlet and condensed system
System is connected；The condenser system includes condensation unit chilldown system, multi-stage refrigerating heat exchanger, condenser system outlet respectively with waste liquid
Tank, low-temperature catalytic oxidation system entry are connected；The low-temperature catalytic oxidation system includes that heater, low temperature catalyst bed, high temperature are touched
Matchmaker's bed, heat pipe ceramic heat exchanger, low-temperature catalytic oxidation system outlet are connected with chimney；During terminal ship, the gas of volatilization
By ship-to-shore docking system, device for recovering oil and gas is incorporated into by blower fan, wind is controlled equipped with micro-pressure sensor in every vapor delivery line
The rotating speed of machine；Adsorption tanks are adsorbed built with activated carbon, organic gas by activated carbon, and the gas after filtering enters low temperature
Catalytic oxidation system, is further processed, and gas up to standard is directly discharged；When some adsorption tanks adsorption saturation, two vacuum machines
Group starts simultaneously, and the organic gas after desorption is condensed into condenser system, and the liquid of condensation is reclaimed into waste liquid tank,
The gas not being condensed enters low-temperature catalytic oxidation system；Tail gas after absorption and the gas not being condensed initially enter low temperature and urge
Change the pretreatment system of oxidation, mixed gas are diluted to less than the 25% of LEL, by the effect of air-introduced machine, drawn
Enter the heating chamber of heater, and changed with the gas for being treated through high-temperature S removal before by heat pipe ceramic heat exchanger
Heat, the gas after heat exchange is converted by two-stage catalysis oxidation bed, and air is entered through chimney through the gas up to standard after treatment；
The adsorption tanks offgas outlet pipeline is connected after being connected with condenser system outlet line with oil pump inlet, and fuel pump outlet is urged with low temperature
Change oxidative system to be connected；The vacuum pump set uses VFC, the recirculated water cooling that the cooling of vacuum pump set is provided by cooling tower
But system supply；The condenser system includes three-level refrigerated heat exchanger；Four adsorption tanks are parallel connection；The tail gas mother tube
Line is connected with chimney entrance；The tail gas feed line is provided with surge tank.
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| CN105617826A (en) * | 2016-02-17 | 2016-06-01 | 大连举扬科技股份有限公司 | Low-temperature plasma oil gas ultra-clean emission treatment process and device |
| CN107297141A (en) * | 2016-04-15 | 2017-10-27 | 中国石油化工股份有限公司 | A kind of petroleum vapor recovery handling process and complexes |
| CN105999997B (en) * | 2016-06-29 | 2018-09-25 | 上海立得催化剂有限公司 | Interruption, small flow, low light hydrocarbon component concentration the tail gas containing lighter hydrocarbons processing method |
| CN107469555A (en) * | 2017-08-30 | 2017-12-15 | 陈进 | Gas recovery system for oil and oil-gas recovery method |
| CN107754546A (en) * | 2017-11-21 | 2018-03-06 | 南京都乐制冷设备有限公司 | A kind of condensation catalytic unit and processing method for handling high-concentration organic waste gas |
| CN107837646B (en) * | 2017-11-28 | 2023-07-28 | 江苏科威环保技术有限公司 | Multi-component organic waste gas safety treatment device and process thereof |
| CN109289504A (en) * | 2018-08-31 | 2019-02-01 | 江苏新久扬环保设备科技有限公司 | A kind of sulfur-containing oil-gas recyclable device and technique |
| CN108993140A (en) * | 2018-09-26 | 2018-12-14 | 南京都乐制冷设备有限公司 | A kind of processing fuel oil VOC containing steamsCondensation adsorption catalytic oxidizing equipment and method |
| CN109821520A (en) * | 2019-03-13 | 2019-05-31 | 常州大学 | A kind of mobile and combined adsorbent desorption and regeneration system on the spot |
| CN109999601A (en) * | 2019-03-15 | 2019-07-12 | 湖北楚天蓝环保设备工程有限公司 | A kind of processing unit and processing method of aviation kerosine VOCs |
| CN109999657B (en) * | 2019-05-08 | 2021-06-22 | 苏州绿锦一方环保科技发展有限公司 | Method for multi-stage purification treatment of waste gas |
| CN110614008A (en) * | 2019-10-30 | 2019-12-27 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Method for treating and recycling evaporation gas of cargo hold of oil tanker |
| CN111249859A (en) * | 2020-02-18 | 2020-06-09 | 青岛诺诚化学品安全科技有限公司 | Low-temperature absorption-low-temperature catalytic oxidation method waste gas recovery treatment process |
| CN112023689A (en) * | 2020-08-25 | 2020-12-04 | 中国石油天然气集团有限公司 | Purification method and purification system for acrylonitrile gas |
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| CN100421757C (en) * | 2005-10-19 | 2008-10-01 | 中国石油化工股份有限公司 | Method for processing light hydrocarbons oxidation sweetening tail gas |
| CN202226647U (en) * | 2011-07-11 | 2012-05-23 | 中国石油化工股份有限公司 | Oil gas recovering system for gas station |
| CN103566619A (en) * | 2013-10-29 | 2014-02-12 | 中国石油化工股份有限公司 | Method for recovering multi-component organic gas mixture |
| CN203916132U (en) * | 2014-07-11 | 2014-11-05 | 海湾环境科技（北京）股份有限公司 | A kind of harbour sour crude oil gas recovery processing system |
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Effective date of registration: 20221107 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: Sinopec Safety Engineering Research Institute Co.,Ltd. Address before: Yanan City, Shandong province Qingdao City three road 266071 No. 218 Patentee before: SINOPEC Research Institute OF SAFETY ENGINEERING Patentee before: CHINA PETROLEUM & CHEMICAL Corp. |