CN107365605A - The method and apparatus that a kind of preposition eddy flow amine liquid of natural gas tail gas treating absorbing tower decolourizes - Google Patents
The method and apparatus that a kind of preposition eddy flow amine liquid of natural gas tail gas treating absorbing tower decolourizes Download PDFInfo
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- CN107365605A CN107365605A CN201710409410.5A CN201710409410A CN107365605A CN 107365605 A CN107365605 A CN 107365605A CN 201710409410 A CN201710409410 A CN 201710409410A CN 107365605 A CN107365605 A CN 107365605A
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- China
- Prior art keywords
- amine liquid
- cyclone
- amine
- eddy flow
- tail gas
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/103—Sulfur containing contaminants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/24—Multiple arrangement thereof
- B04C5/28—Multiple arrangement thereof for parallel flow
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/02—Combustion or pyrolysis
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The present invention relates to the method and apparatus that a kind of preposition eddy flow of natural gas tail gas treating absorbing tower decolourizes.This method utilizes turbulence characteristic in rotating flow centrifugal field, equipment corrosion product, amine liquid catabolite is separated with small size particle from amine liquid, reduces solution colourity, lifts amine liquid quality, reduces equipment corrosion, in the extension fixture life-span, improves Business Economic Benefit.This method technique is advanced, and equipment investment cost is low, and floor space is small, and simple installation, fault rate is low, and effect is good, and energy consumption is low.Present invention also offers the device suitable for the above method.
Description
Technical field
The present invention relates to the processing method and its device of amine liquid solvent eddy flow in a kind of natural gas vent gas treatment.
Background technology
At present, natural gas is as a kind of clean energy resource, obtains more and more extensive utilization, but the natural gas of formation production
Poisonous and hazardous acidic components are usually contained, it is necessary to purified treatment.Natural gas purification is to cause sulphur in raw material using sulfur removal technology
Compound impurity separates so that natural gas meets national natural gas quality standard, while carries out sulphur to acid gas caused by desulfurization and return
Receipts and reclamation tail gas burning.China's sulfur recovery facility is to SO in emission2Content is increasingly strict, national standard GB16927-1996 regulations
Exhaust emission standard requirement more than 99.6% total sulfur recovery.
Gas Purification Factory removing acid gas component generally carries out chemical absorbing using alkanolamine solution, but removes acidity in amine liquid
During component, solution is often subject to different degrees of pollution, causes operational effect to be deteriorated.It is main for the purified treatment of amine liquid
Three-stage filtration technique, i.e. one-level mechanical filter+second order activity charcoal filtering+three-level mechanical filter are used, at least needs three tanks
Body.In addition, according to the makings of unstripped gas and amine liquid foamed phenomenon, while a set of amine liquid defoamer instillation system is set.The technique
Flow is complicated, and the equipment used is more, and equipment investment is high, and floor space is big.
Chinese patent CN201180047151.7 is disclosed in the case of the presence of one or more weak acid, will be contained a kind of or more
The method that kind amine composition decolourizes.This method includes：When weak acid and heat treatment are applied in combination, caused accessory substance is than stronger
Accessory substance greatly reduces caused by inorganic acid so that heat treatment and subsequent isolation technics are more effective, with caused waste compared with
It is few.Although this method decolorizing effect is obvious, acid has corrosiveness to equipment, and these acid are intended to react with amine in addition, shape
Into amine hydrohalide byproducts, while method cost is high.
Chinese patent CN201310688813.X discloses one kind, is a kind of amine purification method based on foam fraction factor,
Foam separator is added before mechanical filter, charcoal absorption and ion interchange unit, removes the surface for causing amine liquid to foam
Active material, so as to extend the cleaning frequency of subsequent mechanical filtering, the replacement cycle of charcoal absorption, ion interchange unit is again
In the raw cycle, the of poor quality of existing simple mechanical filter method purification amine liquid is overcome, but be the increase in equipment investment cost and life
Produce cost.
During natural gas purification processing there is different degrees of pollution, major mechanical impurity and solid solid in amine liquid solvent
Deposit, solution pollution can cause in device that solution foaming blocks liquid, equipment corrosion aggravates and solution Payload reduces etc. and ask
Topic.Amine liquid pollutant concentration is higher, and colourity is deeper, the quality of amine liquid be directly connected to desulfidation tail gas system even running and
The qualification rate of product.
The content of the invention
The purpose of the present invention is the method that eddy flow decolouring is used for natural gas purification tail gas treatment process amine purification, is adopted
Impurity in poor amine liquid is carried out to the process of cyclonic separation with cyclone, using the turbulence characteristic of cyclone, is sufficiently separated regeneration
Corrosion product and small size particle pollutant in poor amine liquid, amine liquid quality is lifted, reduces amine liquid colourity, improve separative efficiency,
Simultaneously but also with the characteristics of simple in construction, characteristics of compact layout, construction investment is low, and later period maintenance expense is few.
On the one hand, should the invention provides the method that a kind of preposition eddy flow amine liquid of natural gas tail gas treating absorbing tower decolourizes
Method includes：
(a) tail gas solvent cyclone is passed through from the amine liquid of regenerator regeneration, amine liquid enters rotational flow field from cyclone inlet
Eddy flow decolouring is carried out, the amine liquid after processing separation is decolourized is entered at the top of absorption tower by cyclone separator overfall via pipeline；
(b) raw natural gas and carry secretly from the H of chilling tower hydrogenating reduction2The acidic components such as S rise into absorb the bottom of the tower
Carry out chemical absorbing；
(c) the decolouring amine liquid counter-current absorption H at the top of absorption tower2S, the tail gas after purification go incinerator to burn.
Further, in step (a), the separating obtained impure amine liquid of cyclone, go to outside system.
Further, in step (a), amine liquid is gone at the top of absorption tower after the separating obtained decolouring of cyclone.
Further, in step (a), by cyclone, amine liquid and corrosion product, catabolite, small particle after regeneration
The realizations such as particulate matter separate, and reduce colourity, lift amine liquid quality.
On the other hand, the present invention also provides a kind of natural gas tail gas treating absorbing tower device that preposition eddy flow amine liquid decolourizes,
The device includes：The cyclone to be decolourized for the separation of amine liquid impurity, the cyclone is used to feed including a tank body, one to be regenerated certainly
The entrance of the amine liquor of tower, one, which is used for amine liquor after decolourizing, exports, and one is used to exclude impure outlet.
Further, the quantity of the eddy flow core pipe can be arranged in parallel according to different treating capacity requirements.
Further, the separation accuracy of the cyclone particulate matter is up to 3 μm.
Further, 20-70 DEG C of operation temperature, operating pressure are 0.3~0.6MPa, and operation flow is 120~200m3/
H, operating flexibility are 60~120%.
It is preferred that 20-50 DEG C of the operation temperature.
The major advantage of methods and apparatus of the present invention is：
The method that a kind of preposition eddy flow amine liquid in exhaust gas processing device absorption tower of the present invention decolourizes, its device use eddy flow
Device, cost is low, simple to operate, takes short, efficiency high.
In a word, the method that a kind of preposition eddy flow amine liquid in exhaust gas processing device absorption tower of the invention decolourizes, is natural gas tail
Amine liquid quality provides new scheme in gas disposal.
Brief description of the drawings
A kind of method flow diagram of the preposition eddy flow purification amine liquid in exhaust gas processing device absorption towers of Fig. 1.
The floor plan that Fig. 2 eddy flow amine liquid decolourizes.
The entrance that Fig. 3 eddy flow amine liquid decolourizes, outlet, underflow colorimetric analysis.
Fig. 4 eddy flow amine liquid decolourings entrance, outlet, underflow chemical constituent.
Embodiment
As shown in figure 1, a kind of method that preposition eddy flow amine liquid in exhaust gas processing device absorption tower decolourizes.
Pass through tail gas solvent cyclone from the amine liquid of regenerator regeneration, amine liquid is carried out from cyclone inlet into rotational flow field
Efficient eddy flow decolourizes, and the amine liquid after processing is by flowing through upper end outlet into absorption tower top after cyclone separator.Raw material day
H of the right gas entrainment from chilling tower hydrogenating reduction2The acidic components such as S enter absorb the bottom of the tower and rise progress chemical absorbing.Absorption tower
The decolouring amine liquid counter-current absorption H at top2S, the tail gas after purification go incinerator to burn.
In methods described, a kind of device of the preposition eddy flow amine liquid decolouring in exhaust gas processing device absorption tower, the device includes：With
In the cyclone that amine liquid decolourizes, the cyclone includes a tank body, one is used to feeding the entrance from the amine liquor of regenerator, and one
Amine liquor for eliminating small size particle exports, and one is used to exclude impure outlet.If Fig. 2 is that eddy flow amine liquid decolourizes
Floor plan.
In methods described, the separating obtained impure amine liquid of cyclone, go to outside system.
In methods described, amine liquid is gone at the top of absorption tower after the separating obtained separation of cyclone.
In methods described, by cyclone, mixed amine liquid and corrosion product, catabolite, small size particle, strengthen and divide
From, reduction colourity, lifting amine liquid quality.
In methods described, the quantity of cyclone can be arranged in parallel according to different treating capacity requirements.
In methods described, the particulate separation precision of cyclone is up to 3 μm.
In methods described, 20-50 DEG C of operation temperature, operating pressure is 0.3~0.6MPa.
The present invention is expanded on further with reference to specific embodiment.It should be appreciated, however, that these embodiments are only used for
It is bright the present invention and be not meant to limit the scope of the invention.The test method of unreceipted actual conditions in the following example, generally
According to normal condition, or according to the condition proposed by manufacturer.
Combination plant tail gas solvent reclamation process in certain 34 billion cubic meter of gas field/year engineering, according to the side in the present invention
Method, the method and device that the preposition eddy flow amine liquid in exhaust gas processing device absorption tower decolourizes, as shown in figure 3, to high to greatest extent
Effect purification amine liquid, and waste liquid is removed in the case where device is continuously run.
In the technological process of natural gas vent gas treatment part, this method and device are easy to operate, easily controllable, reach simultaneously
Industrial production and environmental harmony requirement are met, which raises the job stability of whole technological process, equipment cycle of operation length.
The operation temperature of the equipment is 39 DEG C, operating pressure 0.5Mpa, flow 155m3/h.Have in tail gas solvent cyclone equipment
194 eddy flow core pipes, cyclone core pipe select the HG/S type cyclones of the independent development of East China University of Science, utilize cyclone
Turbulence characteristic idetified separation process, reduce amine liquid colourity, lifted amine liquid quality.Implementation process collection sample as shown in figure 3,
Entrance and exit is brown color organic liquid, and according to platinum cobalt colourity test analysis, test analysis goes out sample Colour in 1000-
It is deeper with underflow outlet color sample between 2500, color is slightly shallow at entrance and top exit, while analyzes sample moisture content
Between 40%-50%, effect is very good.Fig. 4 be one day amine liquid entrance, the component analysis of outlet and underflow, it can be seen that rotation
The component for flowing the amine liquid solvent of device entrance is water, morpholine class, amine, oxide, nitride etc., the amine liquid solvent of cyclone outlet
Component be similarly water, morpholine class, amine, oxide, nitride etc., but the content of amine liquid increases in component, oxide and
Nitride component reduces, and improves the quality of amine liquid.
All it is incorporated as referring in this application in all documents that the present invention refers to, it is independent just as each document
It is incorporated as with reference to such.In addition, it is to be understood that after the above-mentioned instruction content of the present invention has been read, those skilled in the art can
To be made various changes or modifications to the present invention, these equivalent form of values equally fall within the model that the application appended claims are limited
Enclose.
Claims (7)
1. a kind of method that preposition eddy flow amine liquid of natural gas tail gas treating absorbing tower decolourizes, this method include：
(a) tail gas solvent cyclone is passed through from the amine liquid of regenerator regeneration, amine liquid is carried out from cyclone inlet into rotational flow field
Eddy flow is decolourized, and the amine liquid after decolorization is entered at the top of absorption tower by cyclone separator overflow by upper end outlet；
(b) raw natural gas and carry secretly from the H of chilling tower hydrogenating reduction2S acidic components enter absorb the bottom of the tower and rise progress chemistry
Absorb；
(c) the decolouring amine liquid counter-current absorption H at the top of absorption tower2S, the tail gas after purification go incinerator to burn.
2. the method as described in claim 1, it is characterised in that：The separating obtained impure amine liquid of cyclone, goes to outside system.
3. the method as described in claim 1, it is characterised in that：The separating obtained amine liquid of cyclone is gone at the top of absorption tower.
4. the device that a kind of preposition eddy flow amine liquid of natural gas tail gas treating absorbing tower decolourizes, the device include：Decolourized for amine liquid
Cyclone, the cyclone includes a tank body, one is used to feeding the entrance from the amine liquor of regenerator, one be used to separating it is de-
Amine liquor exports after color, an outlet for excluding particulate contaminant.
5. device as claimed in claim 4, it is characterised in that：The quantity of cyclone inward eddy core pipe is according to different treating capacities
It is required that it is arranged in parallel.
6. device as claimed in claim 4, it is characterised in that：3 μm of the particle separation accuracy position of cyclone.
7. device as claimed in claim 5, it is characterised in that：20-70 DEG C of operation temperature, operating pressure are 0.3~0.6MPa,
Operation flow is 120~200m3/ h, operating flexibility are 60~120%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710409410.5A CN107365605A (en) | 2017-06-02 | 2017-06-02 | The method and apparatus that a kind of preposition eddy flow amine liquid of natural gas tail gas treating absorbing tower decolourizes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710409410.5A CN107365605A (en) | 2017-06-02 | 2017-06-02 | The method and apparatus that a kind of preposition eddy flow amine liquid of natural gas tail gas treating absorbing tower decolourizes |
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| Publication Number | Publication Date |
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| CN107365605A true CN107365605A (en) | 2017-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710409410.5A Pending CN107365605A (en) | 2017-06-02 | 2017-06-02 | The method and apparatus that a kind of preposition eddy flow amine liquid of natural gas tail gas treating absorbing tower decolourizes |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102151477A (en) * | 2011-04-07 | 2011-08-17 | 上海华畅环保设备发展有限公司 | Method and device for rotationally purifying serotonin solution of flue gas carbon dioxide capturing system |
| CN103007689A (en) * | 2012-12-26 | 2013-04-03 | 上海华畅环保设备发展有限公司 | Amine liquid run loss comprehensive control method and device in desulfurization solvent regeneration process |
-
2017
- 2017-06-02 CN CN201710409410.5A patent/CN107365605A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102151477A (en) * | 2011-04-07 | 2011-08-17 | 上海华畅环保设备发展有限公司 | Method and device for rotationally purifying serotonin solution of flue gas carbon dioxide capturing system |
| CN103007689A (en) * | 2012-12-26 | 2013-04-03 | 上海华畅环保设备发展有限公司 | Amine liquid run loss comprehensive control method and device in desulfurization solvent regeneration process |
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Application publication date: 20171121 |