CN110479028A - A kind of oil vapor treatment system - Google Patents
A kind of oil vapor treatment system Download PDFInfo
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- CN110479028A CN110479028A CN201910803863.5A CN201910803863A CN110479028A CN 110479028 A CN110479028 A CN 110479028A CN 201910803863 A CN201910803863 A CN 201910803863A CN 110479028 A CN110479028 A CN 110479028A
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- 238000001179 sorption measurement Methods 0.000 claims abstract description 205
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 93
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 70
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 70
- 238000001816 cooling Methods 0.000 claims abstract description 44
- 239000003463 adsorbent Substances 0.000 claims abstract description 42
- 239000002351 wastewater Substances 0.000 claims abstract description 28
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims abstract description 26
- 238000003860 storage Methods 0.000 claims abstract description 14
- 238000011068 loading method Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000005406 washing Methods 0.000 claims description 18
- 238000001704 evaporation Methods 0.000 claims description 13
- 230000008020 evaporation Effects 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000011049 filling Methods 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000001590 oxidative effect Effects 0.000 claims description 8
- 125000003118 aryl group Chemical group 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 14
- 239000012855 volatile organic compound Substances 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 41
- 235000019198 oils Nutrition 0.000 description 32
- 238000010521 absorption reaction Methods 0.000 description 26
- 238000003795 desorption Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 238000012545 processing Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003020 moisturizing effect Effects 0.000 description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N monobenzene Natural products C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 2
- 235000019476 oil-water mixture Nutrition 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 235000020535 bottled fortified water Nutrition 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
- B01D53/0423—Beds in columns
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a kind of oil vapor treatment systems, comprising: for the C in the oil gas of adsorption treatment aromatic hydrocarbons storage tank conveying4 +First adsorption tower of hydrocarbon, the first adsorption tower is interior to be equipped with for loading C4 +The first of hydrocarbon adsorbent loads layer and for carrying out cooling so that C to the first adsorption tower4 +Hydrocarbon is in C4 +The first cooling device condensed on hydrocarbon adsorbent；The second adsorption tower being arranged in series with the first adsorption tower, the second adsorption tower is interior to be equipped with for loading C2‑C3The second of hydrocarbon adsorbent loads layer and for carrying out cooling so that C to the second adsorption tower2‑C3Hydrocarbon is in C2‑C3The second cooling device condensed on hydrocarbon adsorbent, the second adsorption tower are equipped with the first discharge port for emission compliance gas.The present invention is using the first adsorption tower and the second adsorption tower being arranged in series, respectively to the C in oil gas4 +Hydrocarbon and C2‑C3Hydrocarbon carries out classification adsorption treatment, and VOCs or organic wastewater difficult to deal with to aromatic hydrocarbons tank field oil gas etc. have preferable treatment effect.
Description
Technical field
The present invention relates to the processing equipment technical fields of organic exhaust gas and organic wastewater, more specifically to a kind of oil
Gas processing system.
Background technique
In petroleum chemical enterprise, to the processing mode of organic exhaust gas and organic wastewater generally include direct combustion method, membrane separation process,
Condensation method, absorption process and absorption method etc., above-mentioned a variety of processing modes respectively have advantage and disadvantage, wherein more commonly used is absorption method, phase
Ying Di, carbon nano adsorption equipment are rapidly developed and apply.
However, carbon nano adsorption equipment in the prior art generallys use a kind of adsorbent to volatile organic matter (VOCs)
Or organic wastewater is adsorbed, and due to the complexity of VOCs or organic wastewater, it is generally the case that a kind of adsorbent can not fit
Processing for all VOCs or organic wastewater.In particular for aromatic hydrocarbons tank field oil gas, containing non-methane lighter hydrocarbons until diformazan
The wide in range composition of benzene, and there are greatest differences with characterization of adsorption for the concentration of different hydrocarbon, therefore, existing carbon nano adsorption equipment
Treatment effect to aromatic hydrocarbons tank field oil gas is simultaneously bad.
Therefore, how a kind of preferable oil vapor treatment system for the treatment of effect is provided, be current those skilled in the art urgently
It solves the problems, such as.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of oil vapor treatment system, it is more intractable to aromatic hydrocarbons tank field oil gas etc.
VOCs or organic wastewater have preferable treatment effect.
To achieve the goals above, the invention provides the following technical scheme:
A kind of oil vapor treatment system, comprising:
For the C in the oil gas of adsorption treatment aromatic hydrocarbons storage tank conveying4 +First adsorption tower of hydrocarbon is set in first adsorption tower
Have for loading C4 +The first of hydrocarbon adsorbent loads layer and for carrying out cooling so that the C to first adsorption tower4 +Hydrocarbon exists
The C4 +The first cooling device condensed on hydrocarbon adsorbent；
The second adsorption tower being arranged in series with first adsorption tower, second adsorption tower is interior to be equipped with for loading C2-C3
The second of hydrocarbon adsorbent loads layer and for carrying out cooling so that the C to second adsorption tower2-C3Hydrocarbon is in the C2-C3Hydrocarbon
The second cooling device condensed on adsorbent, second adsorption tower are equipped with the first discharge port for emission compliance gas.
Preferably, it is equipped between first adsorption tower and second adsorption tower for adsorbing first adsorption tower
Remaining C after processing4 +Hydrocarbon is transferred to washing and waste water tank in water.
Preferably, first adsorption tower is equipped with:
For to the first heater heated in first adsorption tower；
For making from the C4 +First evaporation mouth of the aromatic naphtha discharge evaporated on hydrocarbon adsorbent；
The oil vapor treatment system further includes being connected with first evaporation mouth, being cooling for carrying out to the aromatic naphtha
Condenser.
Preferably, second adsorption tower is equipped with:
For to the secondary heating mechanism heated in second adsorption tower；
For making from the C2-C3The C steamed on hydrocarbon adsorbent2-C3Second evaporation mouth of hydrocarbon and water discharge；
The oil vapor treatment system further includes being connected with second evaporation mouth, for de- to the second adsorption tower high temperature
Attached C2-C3The catalyst oxidizing tower that hydrocarbon is aoxidized, the catalyst oxidizing tower are equipped with the second row for emission compliance gas
Put mouth.
Preferably, further include and first cooling device, the first heater, second cooling device and institute
The connected control system of the second cooling device is stated, is switched for controlling first cooling device and the first heater
Work, and control second cooling device and the secondary heating mechanism switch operating.
Preferably, the quantity of first adsorption tower is two, and the parallel connection of work can be switched in two first adsorption towers
Setting.
Preferably, two first adsorption towers be equipped with for detect first adsorption tower whether the of adsorption saturation
One detector, first detector are connected with the control system, to work as one of them described first adsorption tower adsorption saturation
Afterwards, another the first adsorption tower switch operating is controlled by the control system.
Preferably, the quantity of second adsorption tower is two, and the parallel connection of work can be switched in two second adsorption towers
Setting.
Preferably, two second adsorption towers be equipped with for detect second adsorption tower whether the of adsorption saturation
Two detectors, second detector are connected with the control system, to work as one of them described second adsorption tower adsorption saturation
Afterwards, another the second adsorption tower switch operating is controlled by the control system.
It preferably, further include for the aromatic hydrocarbons storage tank to first adsorption tower conveying oil gas, the aromatic hydrocarbons storage tank and institute
It states and is equipped with booster pump between the first adsorption tower.
Oil vapor treatment system provided by the invention is right respectively using the first adsorption tower and the second adsorption tower being arranged in series
C in oil gas4 +Hydrocarbon and C2-C3Hydrocarbon carries out classification adsorption treatment, first to the C easily adsorbed in oil gas4 +Hydrocarbon carries out adsorption treatment, then right
The C of hardly possible absorption2-C3Hydrocarbon carries out adsorption treatment, to C2-C3When hydrocarbon carries out adsorption treatment, C2-C3Hydrocarbon adsorbent is not easy by C4 +Hydrocarbon
Pollution, so that C2-C3Hydrocarbon adsorbent has longer absorption service life and higher adsorption efficiency, therefore, to aromatic hydrocarbons tank field oil gas etc.
VOCs or organic wastewater difficult to deal with have preferable treatment effect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural schematic diagram of oil vapor treatment system provided by the specific embodiment of the invention；
Fig. 2 is the process flow chart of Fig. 1.
Appended drawing reference in Fig. 1 and Fig. 2 is as follows:
1 is the first adsorption tower, 2 be the second adsorption tower, 3 be washing and waste water tank, 31 be biochemistry pool or stripper, 32 be to come
Water purification system, 33 be water refrigeration system, 4 be condenser, 5 be catalyst oxidizing tower, 6 be aromatic hydrocarbons storage tank, 7 be booster pump,
81 be the first surge tank, 82 be the second surge tank, 9 be BTX aromatics tank, 91 be knockout tower.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Core of the invention is to provide a kind of oil vapor treatment system, to VOCs difficult to deal with such as aromatic hydrocarbons tank field oil gas or has
Machine waste water has preferable treatment effect.
Fig. 1-Fig. 2 is please referred to, Fig. 1 is the structural schematic diagram of oil vapor treatment system provided by the specific embodiment of the invention；
Fig. 2 is the process flow chart of Fig. 1.
It should be noted that the arrow direction in Fig. 1 and Fig. 2 is the flow direction of gas or liquid.
The present invention provides a kind of oil vapor treatment system, including the first adsorption tower 1 and the second adsorption tower 2 being arranged in series,
One adsorption tower 1 with aromatic hydrocarbons storage tank 6 for being connected, with the C in the oil gas that conveys to aromatic hydrocarbons storage tank 64 +Hydrocarbon progress adsorption treatment, second
The gas access of adsorption tower 2 is connected with the gas vent of the first adsorption tower 1, and the second adsorption tower 2 is used for from 1 row of the first adsorption tower
The C in oil gas out2-C3Hydrocarbon carries out adsorption treatment, and the second adsorption tower 2 is equipped with first discharge port, for discharging C2-C3Hydrocarbon is inhaled
Attached gas up to standard.
Specifically, the first filling layer and the first cooling device are equipped in the first adsorption tower 1, the first filling layer is for loading C4 +
Hydrocarbon adsorbent, so that C4 +Hydrocarbon adsorbent is to C4 +Hydrocarbon is adsorbed；First cooling device is used for empty to the inside of the first adsorption tower 1
Between cool down so that the temperature in the first adsorption tower 1 is maintained at 10-15 DEG C, so that C4 +Hydrocarbon is in C4 +Hydrocarbon adsorbent
Upper condensation.
It is understood that, with increasing for liquid phase, the cooling effect of the first adsorption tower 1 is become better and better when work, first
The gas balance state being transitioned into quickly in adsorption tower 1 under an operating temperature, at this point, C4 +Partial pressure of the hydrocarbon in nitrogen will substantially
Degree reduces.
Similarly, the second filling layer and the second cooling device are equipped in the second adsorption tower 2, the second filling layer is for loading C2-C3
Hydrocarbon adsorbent, so that C2-C3Hydrocarbon adsorbent is to C2-C3Hydrocarbon is adsorbed, and the second cooling device is used for in the second adsorption tower 2
Portion space cools down, so that C2-C3Hydrocarbon is in C2-C3It is condensed on hydrocarbon adsorbent.
It should be noted that the present invention is to C4 +Hydrocarbon adsorbent and C2-C3The specific material of hydrocarbon adsorbent without limitation, ability
Field technique personnel may refer to the prior art, for example, C4 +Hydrocarbon adsorbent and C2-C3Hydrocarbon adsorbent can be the activity of different component
Carbon adsorbent or carbon nanomaterial adsorbent etc..
In addition, the present invention does not limit the specific structure and its cooling principle of the first cooling device and the second cooling device
Fixed, those skilled in the art can select according to actual needs.
As a preferred embodiment, the first cooling device and the second cooling device are chilled water unit, including for flowing
The coil pipe of logical cooling medium, to realize cold in the first adsorption tower 1 and the second adsorption tower 2 by the indirect heat exchange of cooling medium
But cool down.
In view of C4 +Hydrocarbon is in C4 +Condensation effect and C on hydrocarbon adsorbent2-C3Hydrocarbon is in C2-C3Condensation on hydrocarbon adsorbent
Effect, it is preferable that the first filling layer contacts setting with the coil pipe of the first cooling device；Second filling layer and second cooling device
Coil pipe contact setting.
It can thus be seen that oil vapor treatment system provided by the invention, using the first adsorption tower 1 and second being arranged in series
Adsorption tower 2, respectively to the C in oil gas4 +Hydrocarbon and C2-C3Hydrocarbon carries out classification adsorption treatment, first to the C easily adsorbed in oil gas4 +Hydrocarbon into
Row adsorption treatment, then the C to hardly possible absorption2-C3Hydrocarbon carries out adsorption treatment, to C2-C3When hydrocarbon carries out adsorption treatment, C2-C3Hydrocarbon is inhaled
Attached dose is not easy by C4 +Hydrocarbon pollution, so that C2-C3Hydrocarbon adsorbent has longer absorption service life and higher adsorption efficiency, because
This, VOCs or organic wastewater difficult to deal with to aromatic hydrocarbons tank field oil gas etc. have preferable treatment effect.
On the basis of above-described embodiment, the tower bottom of the first adsorption tower 1 passes through first pipe and the first BTX aromatics tank
It is connected, aromatic hydrocarbons condensate liquid is sent directly into first by first pipe when the tower bottom of the first adsorption tower 1 has aromatic hydrocarbons condensate liquid
In BTX aromatics tank, handled to send knockout tower 91 back to.
In view of when the first adsorption tower 1 is to C4 +Hydrocarbon absorption is when being not thorough, to from residual in the oil gas that the first adsorption tower 1 is discharged
Stay C4 +The processing mode of hydrocarbon is equipped between the first adsorption tower 1 and the second adsorption tower 2 and is used on the basis of above-described embodiment
Make remaining C after 1 adsorption treatment of the first adsorption tower4 +Hydrocarbon is transferred to washing and waste water tank 3 in water.
Specifically, the gas being discharged from the gas vent of the first adsorption tower 1 is passed through washing and waste water by second pipe
In tank 3, by the distribution of gas, and the depth in second pipe insertion washing and waste water tank 3 is controlled, carry out fortified water to oil gas
Cleaning function makes the residual C from the gas that the gas vent of the first adsorption tower 1 is discharged4 +Hydrocarbon is completely transferred in water, to avoid
Remain C4 +Hydrocarbon enters in the second adsorption tower 2, to the C in the second adsorption tower 22-C3Hydrocarbon adsorbent pollutes.
It is understood that the gas being discharged from washing and waste water tank 3 is entering C2-C3Before hydrocarbon adsorbent, need first
It is dried, it is therefore preferred that be equipped in the second adsorption tower 2 for the gas being discharged from washing and waste water tank 3 into
The dry hothouse of row.That is, first passing through drying after from the gas being discharged in washing and waste water tank 3 into the second adsorption tower 2
Afterwards, it then is cooled down, subsequently into C2-C3Hydrocarbon adsorbent.
Furthermore, it is contemplated that after gas scrubbing, in the oil water mixture that is generated in washing and waste water tank 3, containing a small amount of
C4 +Hydrocarbon, for the ease of to the C dissolved in washing and waste water tank 34 +Hydrocarbon is handled, on the basis of above-described embodiment, washing
And waste water tank 3 is connected with biochemistry pool or stripper 31.
That is, sending biochemistry pool or stripper 31 to handle the oil water mixture in washing and waste water tank 3.
In view of washing and waste water tank 3 water supply problem, on the basis of above-described embodiment, washing and waste water tank 3 with
It is connected by carrying out water purification system 32 with water refrigeration system 33 between watering.
That is, the present embodiment carries out moisturizing to washing and waste water tank 3 by watering, and in moisturizing, by water system
33 pairs of cooling system need enter washing and waste water tank 3 water carry out technological processing for explosion protection feature, and by come 32 pairs of water purification system need into
The water for entering washing and waste water tank 3 is purified.
In view of the C adsorbed to the first adsorption tower 14 +The recycling problem of hydrocarbon, on the basis of above-mentioned any one embodiment
On, the first adsorption tower 1 is equipped with first heater and the first evaporation mouth, which further includes and the first evaporation mouth phase
Condenser 4 even.
Specifically, first heater is for heating the space in the first adsorption tower 1, by C4+ hydrocarbon adsorbent
The C adsorbed on filling layer4 +Hydrocarbon elevated temperature desorption；First evaporation mouth is used for the aromatic naphtha that will be evaporated from C4+ hydrocarbon adsorbent filling layer
Discharge；Condenser 4 to from the aromatic naphtha of 1 elevated temperature desorption of the first adsorption tower for condensing.
The present embodiment to the specific structure of first heater without limitation, it is preferable that first heater adds for steam
Thermal, including collet and heat exchanger tube, to be added the space in the first adsorption tower 1 by the steam to circulate in collet and heat exchanger tube
Heat is to preset temperature, for example, the first adsorption tower 1 is heated to 150 DEG C.
It is preferably filled with ceramic ring in condenser 4 in the present embodiment, on the basis of the present embodiment, condenser 4 and
Two BTX aromatics tanks are connected, and are mixed with will become liquid aromatic hydrocarbons from the aromatic naphtha of 1 elevated temperature desorption of the first adsorption tower by condenser 4
After object, liquid aromatic hydrocarbon mixture is set to enter the second BTX aromatics tank, convenient for periodically by the liquid aromatic hydrocarbon in the second BTX aromatics tank
Mixture send knockout tower 91 to handle.
It should be noted that the first BTX aromatics tank and the second BTX aromatics tank can be the same BTX aromatics tank 9,
It can be different BTX aromatics tanks, those skilled in the art can select according to actual needs.
It is understood that the first adsorption tower 1 in the present embodiment not only has the function of cryogenic absorption, but also de- with high temperature
Attached function, it is contemplated that the automatic switchover problem of cryogenic absorption and elevated temperature desorption function, on the basis of above-described embodiment, also
Including the control system being connected respectively with the first cooling device and first heater, added with controlling first by control system
Thermal and the first cooling device switch operating.
It should be noted that control of the present invention to control system to first heater and the first cooling device switch operating
Method processed is not specifically limited, for example, control system can by control respectively with chilled water unit and steam heater phase
The on-off of valve even, to control the switching of cooling medium and heat medium, realization cryogenic absorption is cut with elevated temperature desorption function
It changes.
Similarly, it is contemplated that the C of the second adsorption tower 2 absorption2-C3The recycling problem of hydrocarbon, in above-mentioned any one embodiment
On basis, the second adsorption tower 2 is equipped with secondary heating mechanism and the second evaporation mouth, which further includes steaming with second
The connected catalyst oxidizing tower 5 of mouth is sent out, catalyst oxidizing tower 5 is equipped with the second discharge outlet for emission compliance gas.
Specifically, secondary heating mechanism is for heating the space in the second adsorption tower 2, by C2-C3Hydrocarbon adsorbent
The C of upper absorption2-C3Hydrocarbon elevated temperature desorption；Second evaporation mouth is used for will be from C2-C3The C evaporated on hydrocarbon adsorbent2-C3Hydrocarbon and water discharge；
Catalyst oxidizing tower 5 is used for the C to 2 elevated temperature desorption of the second adsorption tower2-C3Hydrocarbon is aoxidized, under the effect of the catalyst, by C2-
C3Hydrocarbon becomes CO2With water, and by CO2It is discharged from the second discharge outlet.
Preferably, secondary heating mechanism is steam heater, including collet and heat exchanger tube, to pass through collet and heat exchanger tube
The steam of middle circulation by the space heating in the second adsorption tower 2 to preset temperature, for example, the second adsorption tower 2 is heated to 100~
150℃。
That is, the second adsorption tower 2 in the present embodiment not only has the function of cryogenic absorption, but also the function with elevated temperature desorption
It can, it is contemplated that the automatic switchover problem of cryogenic absorption and elevated temperature desorption function, on the basis of above-described embodiment, above-mentioned control
The control system that system is connected with the second cooling device and secondary heating mechanism respectively is added with controlling second by control system
Thermal and the second cooling device switch operating.The present invention switches control system to secondary heating mechanism and the second cooling device
The control method of work is not specifically limited.
In order to improve the adsorption efficiency of the first adsorption tower 1, on the basis of above-mentioned any one embodiment, the first absorption
The quantity of tower 1 is two, and being arranged in parallel for work can be switched in two the first adsorption towers 1.
That is, the present embodiment is by adding the quantity of the first adsorption tower 1, the absorption effect of the first adsorption tower of Lai Tigao 1
Rate carries out absorption work after one of them first 1 adsorption saturation of adsorption tower, to be switched to another first adsorption tower 1.
When the first adsorption tower 1 has the function of cryogenic absorption and elevated temperature desorption simultaneously, can be adsorbed at first first
After 1 adsorption saturation of tower, while being switched to second the first adsorption tower 1 progress cryogenic absorption, first adsorption saturation is controlled
The first adsorption tower 1 carry out elevated temperature desorption work.
In view of the realization that two the first adsorption towers 1 automatically switch, on the basis of above-described embodiment, two first suctions
Attached tower 1 be equipped with for detect the first adsorption tower 1 whether the first detector of adsorption saturation, the first detector and control system phase
Even, to control another first adsorption tower 1 by control system and switch work after one of them first 1 adsorption saturation of adsorption tower
Make.
It should be noted that the present embodiment to the specific structure and its testing principle of the first detector without limitation, for example,
First detector can be the visor that 1 tower bottom of the first adsorption tower is arranged in, for observing the liquid level feelings inside the first adsorption tower 1
Condition, with judged by the liquid level situation in the first adsorption tower 1 of detection the first adsorption tower 1 whether adsorption saturation.First detector
It can also be liquidometer, to judge it is full whether the first adsorption tower 1 adsorbs by the height of liquid level in the first adsorption tower 1 of detection
With.
It is understood that control system can be switched by the first cooling device in two the first adsorption towers 1 of control
It works to realize the switching of two the first adsorption towers 1.
Similarly, in order to improve the adsorption efficiency of the second adsorption tower 2, on the basis of above-mentioned any one embodiment,
The quantity of two adsorption towers 2 is two, and being arranged in parallel for work can be switched in two the second adsorption towers 2.
That is, the present embodiment is by adding the quantity of the second adsorption tower 2, the absorption effect of the second adsorption tower of Lai Tigao 2
Rate carries out absorption work after one of them second 2 adsorption saturation of adsorption tower, to be switched to another second adsorption tower 2.
When the second adsorption tower 2 has the function of cryogenic absorption and elevated temperature desorption simultaneously, can be adsorbed at first second
After 2 adsorption saturation of tower, while being switched to second the second adsorption tower 2 progress cryogenic absorption, first adsorption saturation is controlled
The second adsorption tower 2 carry out elevated temperature desorption work.
In view of the realization that two the second adsorption towers 2 automatically switch, on the basis of above-described embodiment, two second suctions
Attached tower 2 be equipped with for detect the second adsorption tower 2 whether the second detector of adsorption saturation, the second detector and control system phase
Even, to control another second adsorption tower 2 by control system and switch work after one of them second 2 adsorption saturation of adsorption tower
Make.
It should be noted that the present embodiment to the specific structure and its testing principle of the second detector without limitation, for example,
Second detector can be the gas detecting instrument of the non-methane total hydrocarbons content in the gas for detecting first discharge port discharge, with
When the non-methane total hydrocarbons content in the gas of first discharge port discharge reaches the 80-85% of non-methane total hydrocarbons qualification discharge peak
When, two 2 switch operatings of the second adsorption tower are controlled by control system.
The needs of in order to meet the absorption of the first adsorption tower 1 and be desorbed to oil-air pressure, on the basis of above-mentioned each embodiment
On, it further include being set between aromatic hydrocarbons storage tank 6 and the first adsorption tower 1 for the aromatic hydrocarbons storage tank 6 to the first adsorption tower 1 conveying oil gas
There is booster pump 7.
That is, the present embodiment is pressurized by the oil gas that booster pump 7 conveys aromatic hydrocarbons storage tank 6, in order to adapt to
The absorption of first adsorption tower 1 and separating process.
Preferably, the first surge tank 81 is equipped between aromatic hydrocarbons storage tank 6 and booster pump 7；Booster pump 7 and the first adsorption tower 1 it
Between be equipped with the second surge tank 82.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.
Each embodiment in this specification is described using progressive mode, the highlights of each of the examples are with other realities
The difference of example is applied, the same or similar parts in each embodiment may refer to each other.
Oil vapor treatment system provided by the present invention is described in detail above.Specific case pair used herein
The principle of the present invention and embodiment are expounded, method of the invention that the above embodiments are only used to help understand
And its core concept.It should be pointed out that for those skilled in the art, before not departing from the principle of the invention
It puts, can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the guarantor of the claims in the present invention
It protects in range.
Claims (10)
1. a kind of oil vapor treatment system characterized by comprising
For the C in the oil gas of adsorption treatment aromatic hydrocarbons storage tank (6) conveying4 +The first adsorption tower (1) of hydrocarbon, first adsorption tower
(1) it is equipped in for loading C4 +First filling layer of hydrocarbon adsorbent and for first adsorption tower (1) carry out it is cooling so that
The C4 +Hydrocarbon is in the C4 +The first cooling device condensed on hydrocarbon adsorbent；
The second adsorption tower (2) being arranged in series with first adsorption tower (1), second adsorption tower (2) is interior to be equipped with for filling
Fill out C2-C3The second of hydrocarbon adsorbent loads layer and for carrying out cooling so that the C to second adsorption tower (2)2-C3Hydrocarbon exists
The C2-C3The second cooling device condensed on hydrocarbon adsorbent, second adsorption tower (2) are equipped with for emission compliance gas
First discharge port.
2. oil vapor treatment system according to claim 1, which is characterized in that first adsorption tower (1) and described second
It is equipped between adsorption tower (2) for making remaining C after the first adsorption tower (1) adsorption treatment4 +Hydrocarbon is transferred to the washing in water
And waste water tank (3).
3. oil vapor treatment system according to claim 1 or 2, which is characterized in that first adsorption tower (1) is equipped with:
For to the first heater heated in first adsorption tower (1)；
For making from the C4 +First evaporation mouth of the aromatic naphtha discharge evaporated on hydrocarbon adsorbent；
The oil vapor treatment system further includes being connected with first evaporation mouth, for carrying out cooling condensation to the aromatic naphtha
Device (4).
4. oil vapor treatment system according to claim 3, which is characterized in that second adsorption tower (2) is equipped with:
For to the secondary heating mechanism heated in second adsorption tower (2)；
For making from the C2-C3The C steamed on hydrocarbon adsorbent2-C3Second evaporation mouth of hydrocarbon and water discharge；
The oil vapor treatment system further includes being connected with second evaporation mouth, for de- to the second adsorption tower (2) high temperature
Attached C2-C3The catalyst oxidizing tower (5) that hydrocarbon is aoxidized, the catalyst oxidizing tower (5) are equipped with for emission compliance gas
Second discharge outlet.
5. oil vapor treatment system according to claim 4, which is characterized in that further include and first cooling device, institute
First heater is stated, the control system that second cooling device is connected with second cooling device, for controlling
The first cooling device and the first heater switch operating are stated, and controls second cooling device and second heating
Device switch operating.
6. oil vapor treatment system according to claim 5, which is characterized in that the quantity of first adsorption tower (1) is two
A, being arranged in parallel for work can be switched in two first adsorption towers (1).
7. oil vapor treatment system according to claim 6, which is characterized in that two first adsorption towers (1) are equipped with
For detect first adsorption tower (1) whether the first detector of adsorption saturation, first detector and the control system
System is connected, and with after one of them described first adsorption tower (1) adsorption saturation, is controlled described in another by the control system
First adsorption tower (1) switch operating.
8. oil vapor treatment system according to claim 5, which is characterized in that the quantity of second adsorption tower (2) is two
A, being arranged in parallel for work can be switched in two second adsorption towers (2).
9. oil vapor treatment system according to claim 8, which is characterized in that two second adsorption towers (2) are equipped with
For detect second adsorption tower (2) whether the second detector of adsorption saturation, second detector and the control system
System is connected, and with after one of them described second adsorption tower (2) adsorption saturation, is controlled described in another by the control system
Second adsorption tower (2) switch operating.
10. oil vapor treatment system according to claim 1, which is characterized in that further include for first adsorption tower
(1) the aromatic hydrocarbons storage tank (6) for conveying oil gas, is equipped with booster pump (7) between the aromatic hydrocarbons storage tank (6) and first adsorption tower (1).
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| CN201910803863.5A CN110479028A (en) | 2019-08-28 | 2019-08-28 | A kind of oil vapor treatment system |
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