CN109999616A - A kind of tail gas absorbing system and technique in oil extraction workshop - Google Patents
A kind of tail gas absorbing system and technique in oil extraction workshop Download PDFInfo
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- CN109999616A CN109999616A CN201910127061.7A CN201910127061A CN109999616A CN 109999616 A CN109999616 A CN 109999616A CN 201910127061 A CN201910127061 A CN 201910127061A CN 109999616 A CN109999616 A CN 109999616A
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- 238000000605 extraction Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 204
- 239000002904 solvent Substances 0.000 claims abstract description 81
- 238000001179 sorption measurement Methods 0.000 claims abstract description 67
- 238000010521 absorption reaction Methods 0.000 claims abstract description 51
- 239000012188 paraffin wax Substances 0.000 claims abstract description 33
- 238000003795 desorption Methods 0.000 claims abstract description 30
- 239000005662 Paraffin oil Substances 0.000 claims abstract description 29
- 238000011084 recovery Methods 0.000 claims abstract description 29
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003595 mist Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 119
- 229910052799 carbon Inorganic materials 0.000 claims description 28
- 230000000694 effects Effects 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 11
- 238000004064 recycling Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000003610 charcoal Substances 0.000 claims description 8
- 239000003463 adsorbent Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 238000004880 explosion Methods 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 238000013022 venting Methods 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 2
- 239000000809 air pollutant Substances 0.000 abstract description 4
- 231100001243 air pollutant Toxicity 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 24
- 235000019198 oils Nutrition 0.000 description 23
- 238000002386 leaching Methods 0.000 description 7
- 241000196324 Embryophyta Species 0.000 description 6
- 239000003925 fat Substances 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008157 edible vegetable oil Substances 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
- 239000001993 wax 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
-
- 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
- B01D53/14—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 absorption
- B01D53/1418—Recovery of products
-
- 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
- B01D53/14—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 absorption
- B01D53/1431—Pretreatment by other processes
- B01D53/145—Pretreatment by separation of solid or liquid material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/205—Other organic compounds not covered by B01D2252/00 - B01D2252/20494
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses the tail gas absorbing system in oil extraction workshop and technique, tail gas absorbing system includes tail gas pretreatment unit, and particle in tail gas and water mist are filtered out；Paraffin oil absorptive unit；Activated carbon adsorption unit, it includes the activated carbon adsorber being connected to the exhaust end of paraffin oil-absorption tower, the desorption component that solvent desorbing can be carried out to activated carbon adsorber, wherein activated carbon adsorber at least there are two, and it is divided into two groups, one group is working group, and another group is spare group, when working group is in adsorption saturation state, spare group is connected to paraffin oil-absorption tower, and desorption component is automatically desorbed the working group under in a saturated state.The middle solvent of tail gas can not only be realized 95%~99.9% rate of recovery by the present invention, and solvent strength when emptying in gas is controlled in 0.08~0.1g/m3, meet GB16297-1996 " discharge standard of air pollutants ", it is easy to operate, it is at low cost.
Description
Technical field
The present invention relates to a kind of tail gas absorbing systems in oil extraction workshop, while the invention further relates to a kind of leachings of grease
The tail gas absorption technology in workshop out.
Background technique
In edible fat leaching manufacture process, the oil plant of leaching is the green compact or oil of the pre-pressed cake of oil plant, oil plant
The swelling granular of material always brings a certain amount of air into when entering leaching system since these oil plants have certain voidage；
Miscella stripping and wet dregs of rice precipitation Shi Junyou direct steam spray into, and equally to bring portion of air into and enter in leaching system；With
And since each equipment seals bad, especially negative pressure evaporation technique, also there is a small amount of air to enter.These air and solvent connect
Touching, has the solvent gas molecule of volatilization, this kind of gas molecule makes the saturation of the air, forms solvent-laden air, and this gas is claimed
Make free gas, also referred to as tail gas, the device that this gas is handled or recycled is known as tail gas absorbing system.
Since this part gas cannot be condensed by condenser, long-term aggregated will increase the pressure in container, if not in time
Discharge, it will influence going on smoothly for production, or even the generation of peril can be caused.Meanwhile it being mixed in this part gas big
The solvent of amount, such as direct emission not only will increase molten consumption, increase cost, and pollute the environment, so, before tail gas emptying
It has to recycle solvent therein.
By above-mentioned known, in the air of each equipment discharge in oil extraction workshop, contain a certain number of solvents always
Steam.Content of the solvent vapo(u)r in itself gas, depending on the composition of solvent cut, and depending on the temperature of condenser.
Solvent in usual this free gas is recycled in recyclable device i.e. tail gas absorbing system.State at present
The method of inside and outside absorption is as follows: freezing recovery method using refrigerant；Utilize paraffin oil or vegetable oil ahsorption recovering method (liquid
Body absorbs)；It utilizes activated carbon adsorption recovery method (solid absorption).The selection of these methods is restricted, depends on solvent vapour
Concentration in the mixed gas of it and air, freezing recycle is when 170~250g/m3 of concentration；Paraffin oil or plant
Oily recycle is when 140~170g/m3 of concentration；Active carbon recycle is when 50~140g/m3 of concentration, if solvent strength
More than these ranges, then the effect of lyosoption will have a greatly reduced quality.Under normal circumstances, paraffin oil ahsorption recovering method is using most
It is more.
Specifically, being divided into the cooling recycling of water at low temperature and two kinds of recycling of refrigerant freezing using refrigerant freezing recovery method.
Water at low temperature uses temperature for 7~15 DEG C of underground water, is not recycled, and this method solvent recovering rate is lower, and a large amount of uses
Underground water, therefore newly-built or transformation oil-fat plant will not use.It is -20~-10 DEG C of system that refrigerant, which mainly uses cooling temperature,
There is the risk of the pollution to edible oil there are commonly ammonia and freon in cryogen, be also unfavorable for environmental protection, and control is very when operation
Trouble, most multipotency are recovered from by institute solvent-laden 60% in gas, and the effect is unsatisfactory.
As for liquid absorption method is used, using paraffin oil as absorbent, used equipment is absorption tower and Analytic Tower,
But after paraffin oil absorbs, the tail gas solvent content that is discharged, it is contemplated that the rate of recovery is 80%~90% or so, and solvent is caused to return
Yield is relatively low, and so, the solvent-oil ratio in edible fat leaching workshop is controlled in 1.5~2.5kg/(t raw material) between, nothing
Method further reduces, while institute's discharge gas is hardly consistent with GB16297-1996 " discharge standard of air pollutants ",
Market competition very fierce today, this causes very big cost pressure and environmental protection pressure to fats and oils processing enterprise.
For activated carbon adsorption recovery method, with good recovering effect, but it has three, that is, adsorbs
The generation of heat and parsing heat, solvent gas, which gathers, reaches explosion limit, and activated carbon adsorption and regenerated operation are intermittently operated,
Therefore its utilization is extremely restricted because aforesaid operations are troublesome and unsafe factor, it is actually now industrially seldom
It uses.(heat of adsorption of active carbon be it is sizable, about every absorption 1g solvent will generate the heat of 347~695J, this heat
It is such as not excluded for accumulate on active-carbon bed, increase quickly temperature, meeting air will cause spontaneous combustion.In addition, free gas into
Enter it is active-carbon bed, it group achievement constantly change, unavoidably reach explosion limit.Although therefore activated carbon adsorption effect is very
It is good, but there are problems that hot-spot and explosion limit.)
In conclusion at present both at home and abroad used by three kinds of absorption process there is serious defect, in process of production to keep away
Exempt from these defect brings trouble even accident, it is necessary to configure a large amount of corollary equipment and be controlled, it is necessary to be equipped with special hilllock
Position personnel are monitored and operate, and work out stringent management measure, it is necessary to design special equipment in workshop leaching for it
Platform, etc., thus investment, production cost, assimilation effect, environmental protection, in terms of, there are technical matters and lack
It falls into.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a kind of improved oil extraction vehicle
Between tail gas absorbing system.
Meanwhile the invention further relates to a kind of tail gas absorption technologies in oil extraction workshop.
In order to solve the above technical problems, the present invention adopts the following technical scheme that:
A kind of tail gas absorbing system in oil extraction workshop comprising:
Paraffin oil absorptive unit comprising paraffin oil-absorption tower, the Analytic Tower, first being connected to oil extraction workshop exhaust end
Condenser and the first solvent recycler, wherein Analytic Tower can be by solvent contained in paraffin oil in paraffin oil-absorption tower
Parse, the first condenser Analytic Tower is parsed after gas liquefaction, the first solvent recycler by after liquefaction solvent with
Paraffin oil is separated and recovered from；
Tail gas pretreatment unit, is arranged between the paraffin oil-absorption tower and oil extraction workshop exhaust end and can
Particle in tail gas and water mist are filtered out；
Activated carbon adsorption unit comprising the activated carbon adsorber that is connected to the exhaust end of the paraffin oil-absorption tower, can
The desorption component of solvent desorbing is carried out to activated carbon adsorber, wherein activated carbon adsorber at least there are two, and be divided into two groups, one
Group is working group, and another group is spare group, and when working group is in adsorption saturation state, spare group connects with paraffin oil-absorption tower
Logical, desorption component is automatically desorbed the working group under in a saturated state.
Preferably, there are two activated carbon adsorbers, one is working group, and one is spare group；Tail gas absorbing system also wraps
The triple valve I for two activated carbon adsorbers to be connected with paraffin oil-absorption tower exhaust end portion is included, when absorption, triple valve
I is connected to an activated carbon adsorber in two with paraffin oil-absorption tower；When an activated carbon adsorber adsorption saturation state
When, activated carbon adsorber in a saturated state stops being passed through the gas being discharged from paraffin oil-absorption tower, and the switching of triple valve I will be another
One activated carbon adsorber is connected to paraffin oil-absorption tower.
A specific implementation according to the present invention and preferred aspect, desorption component include being arranged in each activated carbon adsorber
Row's exhaust gas channel in and for monitor the monitor of exhaust flow be discharged, be connected to monitor and can be to activated carbon adsorber
The desorption mechanism being desorbed and the PLC controller being connected with monitor and desorption mechanism, wherein monitor has setting
Module, when institute's monitor value is less than or equal to definite value set by setting module, PLC controller drives triple valve I to switch, and machine is desorbed
Activated carbon adsorber in a saturated state is desorbed in structure.
Here, applicant explains " setting value ", it is possible to understand that activated carbon adsorber it is in a saturated state under " stream
Measure safety value ", as long as equaling or exceeding the limit value, stop being desorbed for tail gas at once.
Preferably, the direct steaming that mechanism includes the triple valve II being arranged on gas piping, is connected to triple valve II is desorbed
Vapour heating element, the second condenser being connected with each activated carbon adsorber, the second solvent being connected to the second condenser return
It receives device and the acticarbon of activated carbon adsorber can be dried and be cooled down with the suction of activity recovery carbon adsorbent
The accessory of attached ability.
Also there is a solvent to return for another specific implementation according to the present invention and preferred aspect, each activated carbon adsorber
Channel is received, solvent recovery channel is connected with the second condenser, and is respectively equipped on row's exhaust gas channel and solvent recovery channel
First control valve and the second control valve, wherein the first control valve is opened when activated carbon adsorber is in adsorbed state, the second control
Valve closure processed；When in desorption, the second control valve is opened, the first control valve closure.
Preferably, accessory includes the exchanger that heat or cold medium can be added, for heating or cold exchanger
But gas is sent into the first blower in Detachment Activity charcoal adsorption tower.
Specifically, thermal medium is steam, cold medium is cooling water.
Preferably, activated carbon adsorption unit further includes setting on activated carbon adsorber and paraffin oil-absorption tower connecting pipe
The second blower.
Preferably, tail gas pretreatment unit includes the filter containing filter assemblies.
In addition, tail gas absorbing system further include fire arrester, non-return valve, venting of dust explosion mouth and with paraffin oil absorptive unit and work
The nitrogen security protection unit that property charcoal absorbing unit is connected.
It is of the invention another solution is that a kind of tail gas absorption technology in oil extraction workshop, the process employs
The tail gas absorbing system in above-mentioned oil extraction workshop, its step are as follows:
1), the tail gas of oil extraction workshop discharge is filtered out particle in tail gas and water mist by the tail gas pretreatment unit, and is led to
To the paraffin oil absorptive unit；
2), by the paraffin oil absorptive unit, to treated, tail gas absorbs, and passes through the Analytic Tower, the first condensation
Device and the first solvent recycler realize the recycling of solvent, while the gas being discharged is directed to the activated carbon adsorption unit；
3) tail gas adsorption processing, is carried out by the working group of the activated carbon adsorption unit, treated tail gas is from the active carbon
The working group of absorbing unit is discharged, when working group is in adsorption saturation state, from the gas of paraffin oil absorptive unit discharge
Body enters spare group of carry out adsorption treatment, while the desorption component automatically inhales the active carbon under adsorption saturation state
Attached tower carries out solvent desorbing, and after being desorbed solvent recycling, while the activated carbon adsorber after being desorbed formed it is described
Spare group.
Preferably, desorption process is as follows:
A), it is passed through in activated carbon adsorber using direct steam, takes the solvent on acticarbon out of active carbon by steam
Then adsorption tower liquefies, to realize the recycling of solvent；
B), the hot-air after being passed through heating into activated carbon adsorber, so that acticarbon rapid draing；
C), cold air after cooling is passed through into activated carbon adsorber, so that acticarbon is quickly cooled down, with activity recovery
The adsorption capacity of carbon adsorbent.
That is, the activated carbon adsorption unit process in this example is divided into four: absorption, evaporation, dry, cooling, tail gas
When passing through active carbon layer, solvent is adsorbed, and tail gas at this time can (GB16297-1996 " atmosphere pollution comprehensive discharge mark up to standard
It is quasi- ") it is discharged into atmosphere, after the adsorption capacity of active carbon in adsorption tower reduces to a certain extent, tail gas stream is transferred into
To another adsorption tower, the active carbon being saturated by solvent can open direct steam heating, be taken away in adsorbent by water vapour
Solvent, and one play the second condenser condensation, then by the second solvent recycler carry out solvent recovery so can be real
Existing 95%~99.9% rate of recovery.
Meanwhile for the adsorption capacity of the activity recovery charcoal after logical steam, air is carried out by the steam that exchanger is added
It is dry, adsorption tower is then introduced heated air by the first blower, active carbon is dried；Then Jie in exchanger is replaced
Matter is passed through cooling water, is cooled down by exchanger to air, then have the first blower that cold air is oriented to active carbon, in the hope of restoring
The adsorption capacity of active carbon makes adsorption tower complete desorption, so that two adsorption towers being capable of alternate cycles use.
Due to the implementation of above technical scheme, the invention has the following advantages over the prior art:
The middle solvent of tail gas can not only be realized 95%~99.9% rate of recovery, and solvent when emptying in gas by the present invention
Concentration is controlled in 0.08~0.1g/m3, meet GB16297-1996 " discharge standard of air pollutants ", while operating letter
It is single, significantly reduce cost.
Detailed description of the invention
The present invention will be further described in detail with specific embodiment with reference to the accompanying drawing.
Fig. 1 is the structural schematic diagram (trend that the dotted line in figure indicates tail gas) of tail gas absorbing system of the invention；
Wherein: 1, tail gas pretreatment unit；10, filter；
2, paraffin oil absorptive unit；20, paraffin oil-absorption tower；21, Analytic Tower；22, the first condenser；23, the first solvent recovery
Device；
3, activated carbon adsorption unit；30, activated carbon adsorber；30a, row's exhaust gas channel；30b, solvent recovery channel；31, it is desorbed
Component；310, monitor；311, mechanism is desorbed；A, triple valve II；B, direct steam heating component；C, the second condenser；D,
Two solvent recyclers；E, accessory；E1, exchanger；E2, the first blower；F1, the first control valve；F2, the second control valve；32,
Second blower；
4, triple valve I；
X, oil extraction workshop.
Specific embodiment
In order to make the above objects, features, and advantages of the present application more apparent, with reference to the accompanying drawing to the application
Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this Shen
Please.But the application can be implemented with being much different from other way described herein, those skilled in the art can be not
Similar improvement is done in the case where violating the application intension, therefore the application is not limited by the specific embodiments disclosed below.
In the description of the present application, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description the application and simplifies description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present application, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In this application unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the concrete meaning of above-mentioned term in this application can be understood as the case may be.
In this application unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.It needs
It is bright, when element is referred to as " being fixed on " or " being set to " another element, it can directly on the other element or
There may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly to separately
One element may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", "upper", "lower",
"left", "right" and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Referring to Fig. 1, according to the tail gas absorbing system in the oil extraction workshop of the present embodiment comprising tail gas pretreatment is single
Member 1, paraffin oil absorptive unit 2 and activated carbon adsorption unit 3.
Specifically, paraffin oil absorptive unit 2 comprising the paraffin oil being connected to oil extraction workshop X exhaust end absorbs
Tower 20, Analytic Tower 21, the first condenser 22 and the first solvent recycler 23, wherein Analytic Tower 21 is by paraffin oil-absorption tower 20
In come out containing the solvent analysis, the first condenser 22 Analytic Tower 21 is parsed after gas liquefaction, the first solvent recycler 23
Solvent after liquefaction is separated and recovered from paraffin oil.
As for paraffin oil-absorption tower 20, Analytic Tower 21, the first condenser 22 and the first solvent recycler 23, belong to this
Field commonly used equipment does not illustrate it one by one herein.
Tail gas pretreatment unit 1, setting paraffin oil-absorption tower 20 and oil extraction workshop X exhaust end between and energy
It is enough to filter out particle in tail gas and water mist；It mainly includes the filter 10 containing filter assemblies, that is to say, that as long as reaching
Except the particle and water mist in tail gas, and belong to equipment commonly used in the art, it is not described in detail herein.
Activated carbon adsorption unit 3 comprising the activated carbon adsorber 30 that is connected to the exhaust end of paraffin oil-absorption tower 20,
The desorption component 31 that solvent desorbing can be carried out to activated carbon adsorber 30, wherein there are two activated carbon adsorbers 30, and is divided into
Two groups, one is working group, another is spare group, and when working group is in adsorption saturation state, spare group is inhaled with paraffin oil
It receives tower 20 to be connected to, desorption component 31 is automatically desorbed the working group under in a saturated state.
Tail gas absorbing system further includes for two activated carbon adsorbers 30 and paraffin oil-absorption tower 20 to be vented end phase
The triple valve I 4 of connection, when absorption when, triple valve I 4 by two an activated carbon adsorber 30 and paraffin oil-absorption tower 20
Connection；When a 30 adsorption saturation state of activated carbon adsorber, the stopping of activated carbon adsorber 30 in a saturated state is passed through
The gas being discharged from paraffin oil-absorption tower 20, triple valve I 4 switch another activated carbon adsorber 30 and paraffin oil-absorption tower 20
Connection.
Desorption component 31 includes being arranged in row's exhaust gas channel 30a of each activated carbon adsorber 30 and for monitoring discharge
The monitor 310 of exhaust flow is connected to and can be to the desorption mechanism that activated carbon adsorber 30 is desorbed with monitor 310
311 and with monitor 310 and desorption mechanism 311 be connected PLC controller (do not shown in figure, but it is contemplated that), wherein
Monitor 310 has setting module, and when institute's monitor value is less than or equal to definite value set by setting module, PLC controller drives three
Port valve I 4 switches, and mechanism 311 is desorbed, activated carbon adsorber 30 in a saturated state is desorbed.
Here, applicant explains " setting value ", it is possible to understand that activated carbon adsorber it is in a saturated state under " stream
Measure safety value ", as long as equaling or exceeding the limit value, stop being desorbed for tail gas at once.
Desorption mechanism 311 includes II a of triple valve being arranged on gas piping, the direct steam being connected to II a of triple valve
Heating element b, the second condenser c being connected with each activated carbon adsorber 30, the second solvent being connected to the second condenser c
Recover d and the acticarbon of activated carbon adsorber 30 can be dried and be cooled down with activity recovery charcoal absorption
The accessory e of the adsorption capacity of agent.
In this example, each activated carbon adsorber 30 also have a solvent recovery channel 30b, solvent recovery channel 30b with
Second condenser c is connected, and row exhaust gas channel 30a and solvent recovery channel 30b on be respectively equipped with the first control valve f1 and
Second control valve f2, wherein the first control valve f1 is opened, the second control valve f2 when activated carbon adsorber 30 is in adsorbed state
Closure；When in desorption, the second control valve f2 is opened, the first control valve f1 closure.
Accessory e includes the exchanger e1 that heat or cold medium can be added, for exchanger e1 to be heated or cooled
Gas (air) be sent into the first blower e2 in Detachment Activity charcoal adsorption tower 30.
Specifically, thermal medium is steam, cold medium is cooling water.
In this example, 3 process of activated carbon adsorption unit is divided into four: absorption, evaporation, dry, cooling, tail gas pass through active carbon
Layer when, solvent is adsorbed, and tail gas at this time can (GB16297-1996 " discharge standard of air pollutants ") up to standard be discharged into greatly
In gas, after the adsorption capacity of active carbon in adsorption tower reduces to a certain extent, tail gas stream is transferred into another suction
Attached tower, the active carbon being saturated by solvent can open direct steam heating, take away the solvent in adsorbent, and one by water vapour
Play the condensation of the second condenser, solvent recovery then carried out by the second solvent recycler, so, it can be achieved that 95%~
99.9% rate of recovery.
In addition, activated carbon adsorption unit 3 further includes being arranged in activated carbon adsorber 30 and 20 communicating pipe of paraffin oil-absorption tower
The second blower 32 on road.
At the same time, the tail gas absorbing system in this example further includes fire arrester, non-return valve, venting of dust explosion mouth and and paraffin oil
The nitrogen security protection unit that absorptive unit is connected with activated carbon adsorption unit.
In this example, fire arrester, non-return valve, venting of dust explosion mouth, nitrogen safety device are connected to PLC controller, final
Purpose is exactly to form perfect safety control system (although these all do not show in figure, for those in the field, to be
It is very common, it is not described in detail herein).
In conclusion the middle solvent of tail gas can not only be realized 95%~99.9% rate of recovery, Er Qiepai by the present embodiment
Solvent strength when empty in gas is controlled in 0.08~0.1g/m3, meet GB16297-1996 " atmosphere pollution comprehensive discharge mark
It is quasi- ", at the same it is easy to operate, significantly reduce cost.
Meanwhile the implementation process of the present embodiment is as follows:
1), the tail gas of oil extraction workshop discharge is filtered out particle in tail gas and water mist by tail gas pretreatment unit, and leads to stone
Wax oil absorptive unit；
2), by paraffin oil absorptive unit, to treated, tail gas absorbs, and by the Analytic Tower, the first condenser, with
And first solvent recycler realize solvent recycling, while be discharged gas be directed to activated carbon adsorption unit, discharged in
Gas in the content of solvent account for 10% ~ 20%；
3) tail gas adsorption processing, is carried out by the working group of activated carbon adsorption unit, treated tail gas is from activated carbon adsorption unit
Working group's discharge, discharged in gas in the content of solvent account for 0.1% ~ 5%, meanwhile, when working group is in adsorption saturation
When state, the gas being discharged from paraffin oil absorptive unit enters spare group of carry out adsorption treatment, while component is desorbed automatically to suction
Activated carbon adsorber under attached saturation state carries out solvent desorbing, and after being desorbed solvent recycling, while the work after being desorbed
Property charcoal adsorption tower form spare group, such alternate cycles use, can the continual absorption for realizing tail gas.
Meanwhile above-mentioned desorption process is as follows:
A), it is passed through in activated carbon adsorber using direct steam, takes the solvent on acticarbon out of active carbon by steam
Then adsorption tower liquefies, to realize the recycling of solvent；
B), the hot-air after being passed through heating into activated carbon adsorber, so that acticarbon rapid draing；
C), cold air after cooling is passed through into activated carbon adsorber, so that acticarbon is quickly cooled down, with activity recovery
The adsorption capacity of carbon adsorbent.
The present invention is described in detail above, its object is to allow the personage for being familiar with this field technology that can understand this
The content of invention is simultaneously implemented, and it is not intended to limit the scope of the present invention, and the present invention is not limited to above-mentioned implementations
, equivalent change or modification made by all Spirit Essences according to the present invention should all cover in protection scope of the present invention.
Claims (10)
1. a kind of tail gas absorbing system in oil extraction workshop comprising:
Paraffin oil absorptive unit comprising paraffin oil-absorption tower, the Analytic Tower, first being connected to oil extraction workshop exhaust end
Condenser and the first solvent recycler, wherein the Analytic Tower can be by institute in paraffin oil in the paraffin oil-absorption tower
The solvent analysis contained comes out, first condenser Analytic Tower is parsed after gas liquefaction, described first is molten
Solvent after liquefaction is separated and recovered from by agent recover with paraffin oil；
It is characterized by: the tail gas absorbing system further includes that the paraffin oil-absorption tower and the oil extraction is arranged in
Tail gas pretreatment unit, the activated carbon adsorption list that is connected to the paraffin oil-absorption tower exhaust end portion between the exhaust end of workshop
Member, wherein the tail gas pretreatment unit can filter out particle in tail gas and water mist, the activated carbon adsorption unit packet
Include the activated carbon adsorber being connected to the exhaust end of the paraffin oil-absorption tower, can to the activated carbon adsorber carry out it is molten
The desorption component of agent desorption, wherein the activated carbon adsorber at least there are two, and be divided into two groups, one group is working group, another
Group is spare group, and when the working group is in adsorption saturation state, described spare group is connected to the paraffin oil-absorption tower,
The desorption component is automatically desorbed the working group under in a saturated state.
2. the tail gas absorbing system in oil extraction workshop according to claim 1, it is characterised in that: the active carbon is inhaled
There are two attached towers, and one is the working group, and one is described spare group；The tail gas absorbing system further includes for by two
The triple valve I that a activated carbon adsorber is connected with the paraffin oil-absorption tower exhaust end portion, when absorption, described three
An activated carbon adsorber in two is connected to by port valve I with the paraffin oil-absorption tower；The active carbon described in one
When adsorption tower adsorption saturation state, activated carbon adsorber stopping in a saturated state being passed through from the paraffin oil-absorption tower
Another described activated carbon adsorber is connected to by the gas of discharge, the switching of triple valve I with the paraffin oil-absorption tower.
3. the tail gas absorbing system in oil extraction workshop according to claim 2, it is characterised in that: the desorption group
Part include be arranged in row's exhaust gas channel of each activated carbon adsorber and for monitor be discharged exhaust flow monitor,
Be connected to the monitor and can to the desorption mechanism that the activated carbon adsorber is desorbed and with the monitor
With the PLC controller that is connected of the desorption mechanism, wherein the monitor has setting module, be less than when institute's monitor value or
When equal to definite value set by the setting module, the PLC controller drives the triple valve I to switch, and the desorption
The activated carbon adsorber in a saturated state is desorbed in mechanism.
4. the tail gas absorbing system in oil extraction workshop according to claim 3, it is characterised in that: the desorption machine
Structure include the triple valve II being arranged on gas piping, the direct steam heating component being connected to the triple valve II, with it is each
The second condenser that the activated carbon adsorber is connected, the second solvent recycler being connected to second condenser and
The acticarbon of the activated carbon adsorber can be dried and be cooled down with the adsorption energy of activity recovery carbon adsorbent
The accessory of power.
5. the tail gas absorbing system in oil extraction workshop according to claim 4, it is characterised in that: each activity
Charcoal adsorption tower also has a solvent recovery channel, and the solvent recovery channel is connected with second condenser, and
It is respectively equipped with the first control valve and the second control valve on row's exhaust gas channel and the solvent recovery channel, wherein when the work
Property charcoal adsorption tower when being in adsorbed state, first control valve is opened, the second control valve closure；When in desorption
When, second control valve is opened, the first control valve closure.
6. the tail gas absorbing system in oil extraction workshop according to claim 4, it is characterised in that: the assisted parts
Part includes that hot or cold medium exchanger, the gas for the exchanger to be heated or cooled can be added to be sent into de-
The first blower in the attached activated carbon adsorber, wherein the thermal medium is steam, the cold medium is cooling water.
7. the tail gas absorbing system in oil extraction workshop according to claim 1, it is characterised in that: the active carbon
Absorbing unit further includes the second blower being arranged on the activated carbon adsorber and the paraffin oil-absorption tower connecting pipe.
8. the tail gas absorbing system in oil extraction workshop according to claim 1, it is characterised in that: the tail gas is located in advance
Managing unit includes the filter containing filter assemblies；The tail gas absorbing system further include fire arrester, non-return valve, venting of dust explosion mouth,
And the nitrogen security protection unit being connected with the paraffin oil absorptive unit and the activated carbon adsorption unit.
9. a kind of tail gas absorption technology in oil extraction workshop, it is characterised in that: the process employs in claim 1 to 8
The tail gas absorbing system in oil extraction workshop described in any one claim, its step are as follows:
1), the tail gas of oil extraction workshop discharge is filtered out particle in tail gas and water mist by the tail gas pretreatment unit, and is led to
To the paraffin oil absorptive unit；
2), by the paraffin oil absorptive unit, to treated, tail gas absorbs, and passes through the Analytic Tower, the first condensation
Device and the first solvent recycler realize the recycling of solvent, while the gas being discharged is directed to the activated carbon adsorption unit；
3) tail gas adsorption processing, is carried out by the working group of the activated carbon adsorption unit, treated tail gas is from the active carbon
The working group of absorbing unit is discharged, when working group is in adsorption saturation state, from the gas of paraffin oil absorptive unit discharge
Body enters spare group of carry out adsorption treatment, while the desorption component automatically inhales the active carbon under adsorption saturation state
Attached tower carries out solvent desorbing, and after being desorbed solvent recycling, while the activated carbon adsorber after being desorbed formed it is described
Spare group.
10. the tail gas absorption technology in oil extraction workshop according to claim 9, it is characterised in that: the desorption
Process is as follows:
A), it is passed through in activated carbon adsorber using direct steam, takes the solvent on acticarbon out of active carbon by steam
Then adsorption tower liquefies, to realize the recycling of solvent；
B), the hot-air after being passed through heating into activated carbon adsorber, so that acticarbon rapid draing；
C), cold air after cooling is passed through into activated carbon adsorber, so that acticarbon is quickly cooled down, with activity recovery
The adsorption capacity of carbon adsorbent.
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