CN107081052B - Acid gas absorbent and application containing bis- (3- aminopropyl) polyethylene glycol - Google Patents
Acid gas absorbent and application containing bis- (3- aminopropyl) polyethylene glycol Download PDFInfo
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- CN107081052B CN107081052B CN201710442194.4A CN201710442194A CN107081052B CN 107081052 B CN107081052 B CN 107081052B CN 201710442194 A CN201710442194 A CN 201710442194A CN 107081052 B CN107081052 B CN 107081052B
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
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- 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
- B01D2252/204—Amines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
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Abstract
The invention discloses a kind of acid gas absorbent containing bis- (3- aminopropyl) polyethylene glycol and applications, the acid gas absorbent includes the water of the first amine component, the second amine component, physical solvent, corrosion inhibitor, defoaming agent and surplus, first amine component is bis- (3- aminopropyl) polyethylene glycol, second amine component is one or more other amine, wherein, by percentage to the quality, total amine content in acid gas absorbent is 10~85wt%, the content of first amine component is 5~70wt%, and the content of the second amine component is 5~50wt%.The application is the sour gas for being used to remove by the acid gas absorbent in mixed gas.The present invention can be used for the removing of sour gas in natural gas, petroleum refinery's gas, synthesis gas, industrial waste gas, liquefied petroleum gas etc. suitable for removing the sour gas such as carbon dioxide and hydrogen sulfide, the present invention from mixed gas.
Description
Technical field
The invention belongs to the technical fields of environmental protection and gas purification, more particularly, are related to a kind of containing bis- (3- amino
Propyl) polyethylene glycol acid gas absorbent and application.
Background technique
In chemical industry production, all contain CO in a large amount of technique production mixed gas2、SO2、CS2, HCN, COS or mercaptan
Equal sour gas, such as unstripped gas (catalysis drying gas, coking dry gas, the liquid of natural gas, the exploitation gas of petroleum, petroleum and its processing industry
Change gas etc.), water-gas, synthesis gas, the industrial gasses such as oven gas.The presence of these sour gas not only seriously threatens personal peace
Entirely, and the corrosion of equipment and pipeline can be caused, moreover it is possible to make the catalyst poisoning in many production processes, so being that must eliminate
Or the pollutant of control.
In order to remove these sour gas, a variety of methods have now been developed.In commercial scale quotient, according to absorption
The mechanism of acidic components is primarily present two kinds of lyosoptions: chemical solvent and physical solvent, and various solvents hold about such as loading
The feature that amount, dynamics, reproducibility, selectivity, stability, corrosivity, heating/cooling require etc. have its own advantage and
Disadvantage.Industrially confirmed suitable physical solvent be sulfolane and its derivative, aliphatic acid amides, methanol, ethyl alcohol with
And diformazan ether mixture, N-Methyl pyrrolidone, N- alkylated pyrrolidones and the corresponding piperidones of polyethylene glycol；Chemistry
Solvent is alkanolamine and its derivative, and the most commonly used is ethanol amine, diethanol amine, triethanolamine, diisopropanolamine (DIPA), methyl second
Hydramine, methyl diethanolamine, piperazine, 2- (2- amino ethoxy) ethyl alcohol etc., the absorbent of most effective one is containing 2- (2-
Amino ethoxy) ethyl alcohol solution.However, 2- (2- amino ethoxy) ethyl alcohol morpholine easy to form, causes absorbent to absorb energy
The reduction of power.
Therefore, it is necessary to develop new absorbent, to meet the needs for removing sour gas in more industrial productions.
Summary of the invention
In order to solve the problems in the existing technology, the object of the present invention is to provide one kind can further increase absorption
Acid gas absorbent and application of the agent to sour gas absorbability containing bis- (3- aminopropyl) polyethylene glycol.
An aspect of of the present present invention provides a kind of acid gas absorbent for containing bis- (3- aminopropyl) polyethylene glycol, described
Acid gas absorbent includes the water of the first amine component, the second amine component, physical solvent, corrosion inhibitor, defoaming agent and surplus, institute
Stating the first amine component is bis- (3- aminopropyl) polyethylene glycol, and second amine component is one or more other amine, wherein with
Mass percent meter, total amine content in the acid gas absorbent are 10~85wt%, the content of first amine component
For 5~70wt%, the content of second amine component is 5~50wt%.
One embodiment of acid gas absorbent containing bis- (3- aminopropyl) polyethylene glycol according to the present invention, the acid
Property gas absorbent in total amine content be 20~70wt%, preferably 35~60wt%.
One embodiment of acid gas absorbent containing bis- (3- aminopropyl) polyethylene glycol according to the present invention, described the
The content of one amine component is 20~65wt%, preferably 35~60wt%；The content of second amine component is 10~40wt%.
One embodiment of acid gas absorbent containing bis- (3- aminopropyl) polyethylene glycol according to the present invention, the object
The content for managing solvent is 10~60wt%, and the content of the corrosion inhibitor is 0.5~3wt%, the content of the defoaming agent is 1~
2wt%.
According to the present invention containing bis- (3- aminopropyl) polyethylene glycol acid gas absorbent one embodiment, it is described its
Its amine is selected from alkylalkanolamines and cyclammonium, and other amine are preferably methyl diethanolamine, diisopropanolamine (DIPA), tert-butylamine base diethyl
One of hydramine, methyl-ethanolamine, piperazine and methyl piperazine are a variety of.
One embodiment of acid gas absorbent containing bis- (3- aminopropyl) polyethylene glycol according to the present invention, the object
Manage solvent be sulfolane and its alkylated pyrrolidones of derivative, N-Methyl pyrrolidone, N- and its corresponding piperidones and
One of dialkylethers are a variety of.
One embodiment of acid gas absorbent containing bis- (3- aminopropyl) polyethylene glycol according to the present invention, it is described anti-
Corrosive agent is Boratex, boric acid corrosion inhibiter, Na2CO3And NaHCO3In corrosion inhibiter any one or it is two or more with arbitrary proportion
It mixes.
One embodiment of acid gas absorbent containing bis- (3- aminopropyl) polyethylene glycol according to the present invention, it is described to disappear
Infusion is methyl-silicone oil.
Another aspect provides the above-mentioned acid gas absorbents containing bis- (3- aminopropyl) polyethylene glycol
Using the acid gas absorbent is connect under the conditions of 20~60 DEG C of absorption temperature with the mixed gas containing sour gas
The sour gas in the mixed gas is touched and is used to remove, gas and the absorbent for being enriched with sour gas after being handled,
Wherein, the mixed gas is in natural gas, petroleum refinery's gas, synthesis gas, industrial waste gas and liquefied petroleum gas
At least one, the sour gas are CO2、H2S、COS、SO2、SO3、CS2, at least one of HCN and mercaptan, the sour gas
Volume content of the body in mixed gas is 0.02~80%.
One embodiment of the application of acid gas absorbent containing bis- (3- aminopropyl) polyethylene glycol according to the present invention,
The application further includes being enriched in the absorbent of sour gas release from described by desorption, flash distillation or steam stripping and being absorbed
Sour gas and the step of obtain regenerated acid gas absorbent, wherein desorption temperature is 90~135 DEG C, desorption pressures
For 1.5~3MPa.
Compared with prior art, the invention discloses a kind of aqueous solution sour gas for containing bis- (3- aminopropyl) polyethylene glycol
Body absorbent and its application, the acid gas absorbent further include one or more other amine, physical solvent, corrosion inhibitor, disappear
Infusion and water, it is suitable for removing the sour gas such as carbon dioxide and hydrogen sulfide from mixed gas, the present invention can be used for
The removing of sour gas in natural gas, petroleum refinery's gas, synthesis gas, industrial waste gas, liquefied petroleum gas etc..
Detailed description of the invention
Fig. 1 shows the acid gas absorbent using the present invention containing bis- (3- aminopropyl) polyethylene glycol and carries out gaseous mixture
The structure flow chart of sour gas absorbs in body absorption and desorption apparatus.
Description of symbols:
1- gravity separator, 2- filter separator, the absorption tower 3-, 4- rich solution heater, 5- flash tank, 6- flash column, 7-
Lean solution circulating pump, 8- lean solution after-filter, 9- active carbon filter, 10- lean solution prefilter, 11- lean solution aftercooler, 12- are poor
Liquid air cooler, 13- lean solution booster pump, 14- poor rich liquid heat exchanger, 15- regenerator reboiler, 16- regenerator, 17- acid gas are air-cooled
Device, 18- acid gas aftercooler, 19- return tank, 20 reflux pumps, 21- wet purification gas separating device.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
?.
The acid gas absorbent first to the present invention containing bis- (3- aminopropyl) polyethylene glycol is carried out in detail below
It is bright.
An exemplary embodiment of the present invention, the acid gas absorbent containing bis- (3- aminopropyl) polyethylene glycol
Including the first amine component, the second amine component, physical solvent, corrosion inhibitor, defoaming agent and surplus water.Wherein, the first amine component
The reaction speed of sour gas and acid gas absorbent can be enhanced, reduce and absorb tower top acid gas back pressure, increase sour gas
Absorptive capacity of the absorbent to sour gas；Second amine component has, sour gas load height high using concentration, to equipment corruption candle property
The advantages of low, anti-degradation capability is strong and regenerates low energy consumption；Physical solvent can increase acid gas absorbent to sour gas
Solubility；Corrosion inhibiter can slow down significantly or reduce corrosion of the sweetening process middle acid substance to equipment；Defoaming agent reduces solution
Surface tension inhibits foam to generate or eliminate and has generated foam.
Specifically, the first amine component is bis- (3- aminopropyl) polyethylene glycol, and the second amine component is one or more other
Amine, by percentage to the quality, total amine content in acid gas absorbent are 10~85wt%, and the content of the first amine component is 5
~70wt%, the content of second amine component are 5~50wt%.In view of the first amine component is primary amine, with stronger
Alkalinity and have stronger absorbability to sour gas；Also, the acid gas absorbent has concertedness, applicability, association
It is very close with relationships such as the type of effect and component, proportions；Meanwhile the water in acid gas absorbent is necessary group
At part and water can also participate in reacting in absorption process.Therefore, inventor passes through according to the composition and content of sour gas
Experiment obtains total amine content and each amine component content in above-mentioned acid gas absorbent repeatedly, can generate very to sour gas
Good removal effect.
Above-mentioned acid gas absorbent can at low temperature remove most sour gas from mixed gas, may be used also
Absorbed sour gas is desorbed at high temperature under high pressure, and the absorbent is also renewable and realization recycles, and has good
Application prospect.
In fact, the acid gas removal principle that acid gas absorbent of the present invention is utilized is chemical absorbing principle,
Absorption process is completed by the chemical reaction between hydramine and sour gas.
Specific reaction mechanism is given below:
First component amine and CO2Reaction:
Second component amine and CO2Reaction:
In formula, A is-(CH2)3(OCH2CH2)n(CH2)3—。
Wherein, reaction equation (1), (2), (3), (4) are reversible reaction.In removing CO2During, the first amine group
The alkalinity divided is better than the second amine component, then the first amine component absorbs CO2Form more stable system；In regenerative process, second
Amine component is easier to desorb CO2, reduce sour gas load.Thus in entire absorption and desorption cyclic process, the first amine component and
Second amine component mutually acts synergistically, and acid gas absorbent is made to keep certain absorption activity.
Total weight based on gas treating composition, total amine content in acid gas absorbent is preferably 20~
70wt%, further preferably 35~60wt%.Similarly, the content of the first amine component is preferably 20~65wt%, further
Preferably 35~60wt%；The content of second amine component is 10~40wt%.
The other amine selected in the present invention can be selected from alkylalkanolamines and cyclammonium, preferably methyl diethanolamine, two different
One of Propanolamine, tert-butylamine base diethanol amine, methyl-ethanolamine, piperazine and methyl piperazine are a variety of.Preparing the suction
When receiving agent, preferably first the amine composition comprising the first amine component and the second amine component is diluted according to the proportion with water, then with
Other auxiliary agents are mixed to form absorbent.
Auxiliary agent of the invention mainly includes physical solvent, corrosion inhibitor and defoaming agent, wherein the content of physical solvent is 10
~60wt%, the content of corrosion inhibitor are 0.5~3wt%, and the content of defoaming agent is 1~2wt%.
Wherein, physical solvent can be sulfolane and its alkylated pyrrolidones of derivative, N-Methyl pyrrolidone, N-
And its corresponding one of piperidones and dialkylethers or a variety of；Corrosion inhibitor can be slow for Boratex, boric acid
Lose agent, Na2CO3And NaHCO3In corrosion inhibiter any one or two or more be mixed in any proportion；Defoaming agent can be
Methyl-silicone oil, and it is not limited to methyl-silicone oil.
Invention also provides the applications of above-mentioned absorbent, specially by the acid gas absorbent at 20~60 DEG C
The sour gas in mixed gas is contacted and be used to remove with the mixed gas containing sour gas under the conditions of absorption temperature, is obtained
Gas and the absorbent for being enriched with sour gas after processing.
Heretofore described mixed gas is natural gas, petroleum refinery's gas, synthesis gas, industrial waste gas and liquefied petroleum gas
At least one of, sour gas CO2、H2S、COS、SO2、SO3、CS2, at least one of HCN and mercaptan, also, it is acid
Volume content of the gas in mixed gas is preferably 0.02~80%.Absorbent of the invention can be by above-mentioned overwhelming majority acid
Property gas is removed from mixed gas.
Also, acid gas absorbent of the invention can also be regenerated and be recycled, therefore application of the invention is also wrapped
It includes and absorbed sour gas is discharged simultaneously from the above-mentioned absorbent for being enriched with sour gas by desorption, flash distillation or steam stripping
The step of obtaining regenerated acid gas absorbent, wherein desorption temperature is 90~135 DEG C, and desorption pressures are 1.5~3MPa.
For example, desorbing sour gas under conditions of 90~135 DEG C, 1.5~3MPa obtains acid gas absorbent lean solution.
Fig. 1 shows the acid gas absorbent using the present invention containing bis- (3- aminopropyl) polyethylene glycol and carries out gaseous mixture
The structure flow chart of sour gas absorbs in body absorption and desorption apparatus.
As shown in Figure 1, the absorption of sour gas and the solution of acid gas absorbent can be carried out using device shown in FIG. 1
Inhale regeneration.Specifically, device as shown in Figure 1 includes: gravity separator 1, filter separator 2, absorption tower 3, rich solution heater
4, flash tank 5, flash column 6, lean solution circulating pump 7, lean solution after-filter 8, active carbon filter 9, lean solution prefilter 10, lean solution
Aftercooler 11, lean solution air cooler 12, lean solution booster pump 13, poor rich liquid heat exchanger 14, regenerator reboiler 15, regenerator 16, acid
The components such as gas air cooler 17, acid gas aftercooler 18, return tank 19, reflux pump 20, wet purification gas separating device 21.
Unstripped gas enters absorption tower 3 from lower part after gravity separator 1, filter separator 2, and acid gas absorbent is from suction
It receives and enters tower at the top of tower 3, become rich solution from absorption tower after absorbing the sour gas such as hydrogen sulfide, carbon dioxide and organic mercaptan in tower
3 tower bottom flow out, and the sour gas such as hydrogen sulfide, organic mercaptan, carbon dioxide in unstripped gas with acid gas absorbent by connecing
It touches and is removed, unstripped gas becomes purified gas and is discharged after 21 gas-liquid separation of wet purification gas separating device from 3 tower top of absorption tower；From suction
It receives the rich solution that 3 tower bottom of tower comes out and is entered flash distillation plant (including flash tank 5 and flash column after the decompression of rich solution heater 4, heating
6) it is flashed, the rich solution after flash distillation enters regenerator 16 after the heating of poor rich liquid heat exchanger 14 and regenerates, the sour gas after regeneration
Body absorbent enters poor rich liquid heat exchanger 14, then squeezes into lean solution air cooler 12 and lean solution aftercooler 11 through lean solution booster pump 13
It is bifurcated after cooling, a branch is through filter device (including lean solution after-filter 8, active carbon filter 9 and lean solution prefilter
10) it is mixed again with another branch after filtering, is then further divided into two branches, squeezing into absorption tower circulation through lean solution circulating pump 7 all the way makes
With another way accesses flash column 6 and uses.The invention is not limited thereto, can also carry out unstripped gas using the device of other structures
Processing.
It should be understood that above embodiment and following embodiment that the present invention is described in detail are merely to illustrate the present invention rather than limit
The scope of the present invention processed, some nonessential improvement and tune that those skilled in the art's above content according to the present invention is made
It is whole to all belong to the scope of protection of the present invention.
Combined with specific embodiments below to the present invention containing bis- (3- aminopropyl) polyethylene glycol acid gas absorbent and
Its application is described further.
Embodiment 1:
By mass percentage, the acid gas absorbent of the present embodiment includes following components: bis- (3- aminopropyls) are poly-
Ethylene glycol 50wt%, tert-butylamine base diethanol amine 10wt%, sulfolane 30wt%, boric acid corrosion inhibiter 1wt%, methyl-silicone oil
The water of 2wt% and surplus.By the absorption tower to be linked together in the absorbent load map 1 by the continuous type of flow and stripper
Air processing unit in.Absorption tower temperature is increased to 35 DEG C, while stripper temperature is increased to about 105 DEG C, for wrapping
Include H2S 4.2%, CO26.26%, the gas purification of the unstripped gas of organic mercaptan 480ppm, the H after purification in gas2S is
17ppm、CO2For 1.3%, mercaptan 50ppm, the sour gas load of absorbent is 0.78mol (H2S+CO2)/mol amine.
The absorbent rich solution obtained after absorption is entered to regenerator to regenerate after poor rich liquid heat exchanger heats, regeneration temperature is
100 DEG C and pressure are 2MPa.Acid gas absorbent after regeneration enters poor rich liquid heat exchanger and lean solution booster pump, increases through lean solution
Press pump is squeezed into lean solution air cooler and lean solution aftercooler, it is cooling after after the filtering of lean solution filter, the absorbent base that recycles
This not acid gas-containing.
Embodiment 2:
By mass percentage, the acid gas absorbent of the present embodiment includes following components: bis- (3- aminopropyls) are poly-
Ethylene glycol 35wt%, methyl diethanolamine 30wt%, sulfolane 30wt%, boric acid corrosion inhibiter 1wt%, methyl-silicone oil 2wt% and
The water of surplus, by the gas on the absorption tower and stripper that are linked together in the absorbent load map 1 by the continuous type of flow
In processing unit.Absorption tower temperature is increased to 35 DEG C, while stripper temperature is increased to about 105 DEG C, for including H2S
4.2%, CO26.26%, the gas purification of the unstripped gas of organic mercaptan 480ppm, H in gas after purification2S is 20ppm, CO2For
2.1%, mercaptan 69ppm, the sour gas load of absorbent are 0.75mol (H2S+CO2)/mol amine.
The absorbent rich solution obtained after absorption is entered to regenerator to regenerate after poor rich liquid heat exchanger heats, regeneration temperature is
100 DEG C and pressure are 2MPa.Acid gas absorbent after regeneration enters poor rich liquid heat exchanger and lean solution booster pump, increases through lean solution
Press pump is squeezed into lean solution air cooler and lean solution aftercooler, it is cooling after after the filtering of lean solution filter, the absorbent base that recycles
This not acid gas-containing.
Embodiment 3:
By mass percentage, the acid gas absorbent of the present embodiment includes following components: bis- (3- aminopropyls) are poly-
Ethylene glycol 55wt%, methyl diethanolamine 10wt%, sulfolane 30wt%, boric acid corrosion inhibiter 1wt%, methyl-silicone oil 2wt% and
The water of surplus.By the gas on the absorption tower and stripper that are linked together in the absorbent load map 1 by the continuous type of flow
In processing unit.Absorption tower temperature is increased to 35 DEG C, while stripper temperature is increased to about 105 DEG C, for including H2S
4.2%, CO26.26%, the gas purification of the unstripped gas of organic mercaptan 480ppm, the H after purification in gas2S is 11ppm, CO2
For 1.9%, mercaptan 76ppm, the sour gas load of absorbent is 0.76mol (H2S+CO2)/mol amine.
The absorbent rich solution obtained after absorption is entered to regenerator to regenerate after poor rich liquid heat exchanger heats, regeneration temperature is
100 DEG C and pressure are 2MPa.Acid gas absorbent after regeneration enters poor rich liquid heat exchanger and lean solution booster pump, increases through lean solution
Press pump is squeezed into lean solution air cooler and lean solution aftercooler, it is cooling after after the filtering of lean solution filter, the absorbent base that recycles
This not acid gas-containing.
Embodiment 4:
By mass percentage, the acid gas absorbent of the present embodiment includes following components: bis- (3- aminopropyls) are poly-
Ethylene glycol 30wt%, methyl-ethanolamine 30wt%, sulfolane 35wt%, boric acid corrosion inhibiter 1wt%, methyl-silicone oil 2wt% and
The water of surplus.By the gas on the absorption tower and stripper that are linked together in the absorbent load map 1 by the continuous type of flow
In processing unit.Absorption tower temperature is increased to 35 DEG C, while stripper temperature is increased to about 105 DEG C, for including H2S
4.2%, CO26.26%, the gas purification of the unstripped gas of organic mercaptan 480ppm, the H after purification in gas2S is 9ppm, CO2
For 1.7%, organic mercaptan 71ppm, the sour gas load 0.77mol (H of absorbent2S+CO2)/mol amine.
The absorbent rich solution obtained after absorption is entered to regenerator to regenerate after poor rich liquid heat exchanger heats, regeneration temperature is
100 DEG C and pressure are 2MPa.Acid gas absorbent after regeneration enters poor rich liquid heat exchanger and lean solution booster pump, increases through lean solution
Press pump is squeezed into lean solution air cooler and lean solution aftercooler, it is cooling after after the filtering of lean solution filter, the absorbent base that recycles
This not acid gas-containing.
Embodiment 1-4 is it is found that acid gas absorbent of the present invention containing bis- (3- aminopropyl) polyethylene glycol greatly enhances
Its sour gas load amount has good sour gas assimilation effect and power of regeneration.
Comparative example 1:
By mass percentage, the acid gas absorbent of this comparative example includes following components: bis- (3- aminopropyls) are poly-
Ethylene glycol 3%, methyl piperazine 35%, sulfolane 45%, boric acid corrosion inhibiter 1%, methyl-silicone oil 2% and surplus water.By the suction
In the air processing unit for receiving the absorption tower and stripper that link together in agent load map 1 by the continuous type of flow.It will inhale
It receives tower temperature degree and is increased to 35 DEG C, while stripper temperature is increased to about 105 DEG C, for including H2S 4.2%, CO26.26%,
The gas purification of the unstripped gas of organic mercaptan 480ppm, the H after purification in gas2S is 89ppm, CO2It is for 3.5%, mercaptan
153ppm, the sour gas load 0.59mol (H of absorbent2S+CO2)/mol amine.
The content of the first component amine is lower than preferred content in this comparative example, and compared with embodiment 1-4, the acid gas of absorbent is negative
Lotus has dropped nearly 0.2mol (H2S+CO2)/mol amine or so, each acidic components content increases in gas after purification.
Comparative example 2:
By mass percentage, the acid gas absorbent of this comparative example includes following components: bis- (3- aminopropyls) are poly-
The water of ethylene glycol 50wt%, sulfolane 40wt%, boric acid corrosion inhibiter 1wt%, methyl-silicone oil 2wt% and surplus.By the absorbent
In the air processing unit on the absorption tower and stripper that are linked together in load map 1 by the continuous type of flow.By absorption tower
Temperature is increased to 35 DEG C, while stripper temperature is increased to about 105 DEG C, for including H2S 4.2%, CO26.26%, organic
The gas purification of the unstripped gas of mercaptan 480ppm, the H after purification in gas2S is 100ppm, CO2It is for 2.9%, mercaptan
130ppm, the sour gas load of absorbent are 0.68mol (H2S+CO2)/mol amine.
The absorbent rich solution obtained after absorption is entered to regenerator to regenerate after poor rich liquid heat exchanger heats, regeneration temperature is
100 DEG C and pressure are 2MPa.Acid gas absorbent after regeneration enters poor rich liquid heat exchanger and lean solution booster pump, increases through lean solution
Press pump is squeezed into lean solution air cooler and lean solution aftercooler, it is cooling after after the filtering of lean solution filter, the absorbent base that recycles
This not acid gas-containing.
Comparative example 3:
By mass percentage, the acid gas absorbent of this comparative example includes following components: methyl diethanolamine
The water of 50wt%, sulfolane 40wt%, boric acid corrosion inhibiter 1wt%, methyl-silicone oil 2wt% and surplus, by the absorbent load map 1
In in the air processing unit on absorption tower and stripper that is linked together by the continuous type of flow.Absorption tower temperature is increased
About 105 DEG C are increased to 35 DEG C, while by stripper temperature, for including H2S 4.2%, CO26.26%, organic mercaptan
The gas purification of the unstripped gas of 480ppm, H in gas after purification2S is 108ppm, CO2For 2.7%, mercaptan 99ppm, absorbent
Sour gas load be 0.69mol (H2S+CO2)/mol amine.
The absorbent rich solution obtained after absorption is entered to regenerator to regenerate after poor rich liquid heat exchanger heats, regeneration temperature is
100 DEG C and pressure are 2MPa.Acid gas absorbent after regeneration enters poor rich liquid heat exchanger and lean solution booster pump, increases through lean solution
Press pump is squeezed into lean solution air cooler and lean solution aftercooler, it is cooling after after the filtering of lean solution filter, the absorbent base that recycles
This not acid gas-containing.
Comparative example 2,3 is the separately absorbent containing the first component amine or the second component amine, the acid gas of absorbent
Load is declined, and nearly 0.1mol (H is had dropped2S+CO2)/mol amine；Each acidic components content after purification in gas has
Increased.
In conclusion the aqueous solution acid gas absorbent in the present invention containing bis- (3- aminopropyl) polyethylene glycol further includes
One or more other amine, physical solvent, corrosion inhibitor, defoaming agent and water, it is suitable for such as two are removed from mixed gas
The sour gas such as carbonoxide and hydrogen sulfide, the present invention can be used for natural gas, petroleum refinery's gas, synthesis gas, industrial waste gas, liquefaction stone
The removing of sour gas in oil gas etc..
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (12)
1. the acid gas absorbent that one kind contains bis- (3- aminopropyl) polyethylene glycol, which is characterized in that the sour gas is inhaled
Receive the water that agent includes the first amine component, the second amine component, physical solvent, corrosion inhibitor, defoaming agent and surplus, the first amine group
It is divided into bis- (3- aminopropyl) polyethylene glycol, second amine component is one or more other amine, and other amine are selected from chain
Alkyl alcoholamine and cyclammonium, wherein by percentage to the quality, total amine content in the acid gas absorbent is 10~
85wt%, the content of first amine component are 5~50wt%, and the content of second amine component is 5~50wt%.
2. containing the acid gas absorbent of bis- (3- aminopropyl) polyethylene glycol according to claim 1, which is characterized in that institute
Stating total amine content in acid gas absorbent is 20~70wt%.
3. containing the acid gas absorbent of bis- (3- aminopropyl) polyethylene glycol according to claim 2, which is characterized in that institute
Stating total amine content in acid gas absorbent is 35~60wt%.
4. containing the acid gas absorbent of bis- (3- aminopropyl) polyethylene glycol according to claim 1, which is characterized in that institute
The content for stating the first amine component is 20~50wt%, and the content of second amine component is 10~40wt%.
5. containing the acid gas absorbent of bis- (3- aminopropyl) polyethylene glycol according to claim 4, which is characterized in that institute
The content for stating the first amine component is 35~50wt%.
6. containing the acid gas absorbent of bis- (3- aminopropyl) polyethylene glycol according to claim 1, which is characterized in that institute
The content for stating physical solvent is 10~60wt%, and the content of the corrosion inhibitor is 0.5~3wt%, the content of the defoaming agent
For 1~2wt%.
7. containing the acid gas absorbent of bis- (3- aminopropyl) polyethylene glycol according to claim 1, which is characterized in that institute
Stating other amine is methyl diethanolamine, methyl-ethanolamine, diisopropanolamine (DIPA), tert-butylamine base diethanol amine, piperazine and methyl piperazine
One of piperazine is a variety of.
8. containing the acid gas absorbent of bis- (3- aminopropyl) polyethylene glycol according to claim 1, which is characterized in that institute
Stating physical solvent is sulfolane and its alkylated pyrrolidones of derivative, N-Methyl pyrrolidone, N- and its corresponding piperidines
One of ketone and dialkylethers are a variety of.
9. containing the acid gas absorbent of bis- (3- aminopropyl) polyethylene glycol according to claim 1, which is characterized in that institute
Stating corrosion inhibitor is Boratex, boric acid corrosion inhibiter, Na2CO3And NaHCO3In corrosion inhibiter any one or it is two or more with any
Ratio mixes.
10. containing the acid gas absorbent of bis- (3- aminopropyl) polyethylene glycol according to claim 1, which is characterized in that
The defoaming agent is methyl-silicone oil.
11. the acid gas absorbent as described in any one of claims 1 to 10 containing bis- (3- aminopropyl) polyethylene glycol
Using, which is characterized in that by the acid gas absorbent under the conditions of 20~60 DEG C of absorption temperature with contain sour gas
Mixed gas contact and be used to remove the sour gas in the mixed gas, gas and be enriched with sour gas after being handled
The absorbent of body,
Wherein, the mixed gas be natural gas, petroleum refinery's gas, synthesis gas, industrial waste gas and liquefied petroleum gas at least
One kind, the sour gas are CO2、H2S、COS、SO2、SO3、CS2, at least one of HCN and mercaptan, the sour gas exists
Volume content in mixed gas is 0.02~80%.
12. the application of the acid gas absorbent containing bis- (3- aminopropyl) polyethylene glycol according to claim 11, special
Sign is that the application further includes releasing by desorption, flash distillation or steam stripping from described be enriched in the absorbent of sour gas
The step of putting absorbed sour gas and obtaining regenerated acid gas absorbent, wherein desorption temperature is 90~135 DEG C,
Desorption pressures are 1.5~3MPa.
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| CN101322900A (en) * | 2008-07-29 | 2008-12-17 | 顾泽元 | Compositional type reclaiming agent |
| CN101327392A (en) * | 2007-06-12 | 2008-12-24 | 韩国电力公社 | Absorbent for acid gas separation |
| CN102652033A (en) * | 2010-01-05 | 2012-08-29 | 蒂森克虏伯伍德公司 | CO2 removal from gases by means of aqueous amine solutions with the addition of a sterically hindered amine |
| CN106457125A (en) * | 2014-05-23 | 2017-02-22 | 塔明克公司 | Improved acid gas removal process by absorbent solution comprising amine compounds |
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| FR2992229B1 (en) * | 2012-06-26 | 2015-10-30 | IFP Energies Nouvelles | ABSORBENT SOLUTION BASED ON TERTIARY DIAMINS BELONGING TO THE AMINOETHYLMORPHOLINES FAMILY AND METHOD FOR REMOVING ACIDIC COMPOUNDS FROM A GASEOUS EFFLUENT |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101327392A (en) * | 2007-06-12 | 2008-12-24 | 韩国电力公社 | Absorbent for acid gas separation |
| CN101322900A (en) * | 2008-07-29 | 2008-12-17 | 顾泽元 | Compositional type reclaiming agent |
| CN102652033A (en) * | 2010-01-05 | 2012-08-29 | 蒂森克虏伯伍德公司 | CO2 removal from gases by means of aqueous amine solutions with the addition of a sterically hindered amine |
| CN106457125A (en) * | 2014-05-23 | 2017-02-22 | 塔明克公司 | Improved acid gas removal process by absorbent solution comprising amine compounds |
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