CN209567807U - For removing the absorption tower of carbon dioxide from synthetic gas - Google Patents

For removing the absorption tower of carbon dioxide from synthetic gas Download PDF

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Publication number
CN209567807U
CN209567807U CN201821245199.4U CN201821245199U CN209567807U CN 209567807 U CN209567807 U CN 209567807U CN 201821245199 U CN201821245199 U CN 201821245199U CN 209567807 U CN209567807 U CN 209567807U
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China
Prior art keywords
absorption tower
section
structured packing
tower
synthetic gas
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CN201821245199.4U
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Chinese (zh)
Inventor
索菲亚·施密特
罗伯特·萨博
马蒂亚斯·利尼西斯
克里斯汀·弗雷
莎伦·科尔贝特
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George Lode Methodology Research And Development Liquefied Air Co Ltd
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George Lode Methodology Research And Development Liquefied Air Co Ltd
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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
    • B01D53/14—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
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • 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
    • B01D53/1406—Multiple stage absorption
    • 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
    • B01D53/1456—Removing acid components
    • B01D53/1475—Removing carbon dioxide
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/50—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
    • C01B3/52—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with liquids; Regeneration of used liquids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/002—Removal of contaminants
    • C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
    • 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
    • B01D2252/202—Alcohols or their derivatives
    • B01D2252/2021—Methanol
    • 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
    • B01D2252/2041—Diamines
    • 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
    • B01D2252/20436—Cyclic amines
    • B01D2252/20468—Cyclic amines containing a pyrrolidone-ring
    • 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
    • B01D2252/20478—Alkanolamines
    • B01D2252/20489—Alkanolamines with two or more hydroxyl groups
    • 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
    • B01D2252/50—Combinations of absorbents
    • B01D2252/504—Mixtures of two or more absorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/304—Hydrogen sulfide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/306—Organic sulfur compounds, e.g. mercaptans
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/308—Carbonoxysulfide COS
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • B01D2257/406—Ammonia
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Gas Separation By Absorption (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The utility model relates to the absorption towers for removing carbon dioxide from synthetic gas.The absorption tower of the utility model is used for by removing carbon dioxide from the synthetic gas stream with liquid physics absorbing medium washing synthesis gas stream, wherein the absorption tower is at least configured as packed column over a part of its length；Also, the absorption tower is subdivided into three sections, wherein nethermost section and intermediate section respectively contain structured packing；It is characterized in that, the ratio of the specific surface area of the structured packing of the nethermost section on the specific surface area of the structured packing of the section of the centre and the absorption tower is 1.0 to 3.6.

Description

For removing the absorption tower of carbon dioxide from synthetic gas
Technical field
The utility model relates to absorption tower, the absorption tower is used for by with liquid physics absorbing medium washing synthesis gas Stream removes carbon dioxide from crude synthetic gas stream.
Background technique
For removing the absorption tower of undesirable accompaniment from crude synthetic gas stream and technique is known, such as Rectisol technique, Purisol technique and Selexol technique.
The Purisol technique and the Selexol technique are in Ullmann ' s Encyclopedia of Industrial Chemistry [Liv Ullmann industrial chemistry encyclopaedia], volume 15, is generally retouched in the 404-407 pages by the 6th edition It states.The Purisol technique uses organic absorbent medium N- methyl pyrrolidone, and in environment temperature or slightly below environment temperature It is run at a temperature of degree.The Selexol technique uses polyethylene glycol dimethyl ether as absorbing medium.
The Rectisol technique is in Liv Ullmann industrial chemistry encyclopaedia, sixth version, volume 15, page 399 and it is following in Generally it is described.For example, being similar to the Purisol technique, which be used to purify the association of crude synthetic gas Gas, the crude synthetic gas are mainly made of CO and H2, and by heavy oil, petroleum coke, waste product partial oxidation or by Coal/oil residue gasification generates.The Rectisol technique uses low-temp methanol as absorbing medium and utilizes the characteristic of methanol (i.e. it sharp increases the absorptivity of accompaniment as temperature reduces, while it is for carbon monoxide (CO) and hydrogen (H2) absorptivity be kept approximately constant).Undesirable accompaniment is mainly accompanying gas carbonyl sulfide (COS), hydrogen sulfide (H2S) With carbon dioxide (CO2)。
In the Rectisol technique, area is carried out between standard Rectisol technique and selectivity Rectisol technique Point.
In so-called standard Rectisol technique, accompanying gas COS/H2S and CO2In an absorption step together from It is removed in crude synthetic gas.
In so-called selectivity Rectisol technique, the accompanying gas COS/H of sulfur-bearing2S and CO2Individually continuous It is removed respectively from crude synthetic gas in absorption step.
For equipment, these absorption steps can carry out in individual tower or in combined tower, in the combination Tower lower part in realize COS/H2S absorption and at an upper portion thereof middle realization CO2It absorbs.
In order to increase the economy for the device for generating and purifying for synthetic gas, device is configured for being continuously increased Gas throughput.The tower for needing that there is maximum possible diameter, but diameter is limited by for producing position to device structure from device The maximum for building the transport of the component of position allows the upper limit of size.Especially it is responsible for CO2The tower section of absorption represents bottleneck. In order not to be more than maximum permissible tower diameter, existing in some cases to installation is not one but the tower of multiple parallel connections becomes Gesture, however sharply increasing for capital cost becomes tradeoff at this time.
Utility model content
The purpose of the utility model is to provide one kind for removing CO from synthetic gas2Absorption tower, for identical Tower diameter, the absorption tower show the increase of absorbability.
The purpose is realized by absorption tower according to the present utility model.
Absorption tower according to the present utility model:
The utility model provides a kind of absorption tower, and the absorption tower is used for by washing conjunction with liquid physics absorbing medium Carbon dioxide is removed from the synthetic gas stream at gas stream, which is characterized in that the tower is at least in a part of its length On be configured as packed column.
In the preferred embodiment of the utility model, tower is subdivided into three sections, wherein nethermost section and centre Section respectively contain structured packing, and uppermost section contains mass transfer tower board.
The methanol washing synthesis gas of hot recycling is used in uppermost section.In intermediate section, flash regeneration is used Methanol (passing through the methanol of decompression degassing) and the mixture washing synthesis gas of methanol that is supported in the section on top.Quilt It loads and the methanol being therefore heated in intermediate section is cooled down using cooling device, and be then used in tower It is washed in nethermost section.
Section is understood to mean the region containing the internal component (such as column plate or structured packing) for promoting mass transfer, Wherein it is installed between continuous section for collecting or distributing the device of cleaning solution.
Another preferred embodiment of the utility model is characterized in that, tower diameter between 1500 mm and 6000mm, It is preferred that between 2800mm and 4800mm.For advantageous capital and operating cost, warp of these diameters particularly suitable for tower Ji configuration.
Another preferred embodiment of the utility model is characterized in that, the specific surface area of the structured packing in intermediate stage Ratio with the specific surface area of the structured packing in the bottom stage of tower is 1.0 to 3.6, preferably 1.0 to 2.8 and/or it is special Sign is, the ratio of the packed height of the structured packing in the bottom stage of the packed height and tower of the structured packing in intermediate stage It is 1.0 to 4.0, preferably 1.5 to 3.0.Compared to the conventional tower for being equipped with column plate, the absorbability of tower according to the present utility model Most apparent enhancing it is contemplated that in these ratio ranges.The embodiment is particularly suitable for for carrying out the Rectisol technique Device in use the tower.
Another preferred embodiment of the utility model is characterized in that, additionally includes for from synthetic gas Remove COS/H2The section of S and for from synthetic gas remove trace components (such as HCN, NH3, mercaptan and metal-carbonyl chemical combination Object) section, the section is arranged at for CO2The lower section of first three section on the top of absorption.
This allows to be avoided for removing COS/H2The individual tower of S and trace components and save capital cost.
The utility model further includes absorption tower according to the present utility model for running selective Rectisol technique Purposes in device, the technique use low-temp methanol as absorbing medium.
The utility model additionally includes absorption tower according to the present utility model for running the Purisol technique Purposes in device, the technique use N-Methyl pyrrolidone as absorbing medium.
The utility model further includes absorption tower according to the present utility model in the device for running the Selexol technique In purposes, the technique uses polyethylene glycol dimethyl ether as absorbing medium.
The utility model further includes absorption tower according to the present utility model in the device for running process for purifying gas Purposes, the technique uses selected from methanol and N-Methyl pyrrolidone, N- crassitude and amine-containing absorbing medium (such as Diethanol amine, diisopropylamine or diethylamine) or methanol and amine-containing absorbing medium (such as diethanol amine, diisopropylamine or diethyl Amine) mixture as absorbing medium.
In short, the utility model provides a kind of absorption tower, the absorption tower is used for by with liquid physics absorbing medium Washing synthesis gas stream removes carbon dioxide from the synthetic gas stream, wherein the absorption tower is at least the one of its length Packed column is configured as on part；Also, the absorption tower is subdivided into three sections, wherein nethermost section and centre Section respectively contains structured packing；It is characterized in that, the specific surface area of the structured packing of the section of the centre and the absorption The ratio of the specific surface area of the structured packing of the nethermost section of tower is 1.0 to 3.6.
Preferably, tower diameter is between 1500mm and 6000mm.
Preferably, tower diameter is between 2800mm and 4800mm.
Preferably, the nethermost area of the specific surface area of the structured packing of the section of the centre and the absorption tower The ratio of the specific surface area of the structured packing of section is 1.0 to 2.8.
Preferably, the nethermost area of the packed height of the structured packing of the section of the centre and the absorption tower The ratio of the packed height of the structured packing of section is 1.0 to 4.0.
Preferably, the nethermost area of the packed height of the structured packing of the section of the centre and the absorption tower The ratio of the packed height of the structured packing of section is 1.5 to 3.0.
Preferably, the absorption tower additionally includes one or more sections, and one or more of sections are used for from conjunction At the COS/H that removing is present in the synthetic gas in gas2S、 NH3, mercaptan, metal carbonyl and/or other Trace components, one or more of sections are arranged at the lower section of three sections.
Description of the other feature, advantage and the possible application of the utility model from following exemplary embodiment and attached drawing In be also obvious.All descriptions and/or description feature itself is formed originally practical with any desired combination Novel theme.
Detailed description of the invention
The utility model will be elucidated below with reference to attached drawing.
Unique attached drawing (i.e. Fig. 1) in the Figure of description of the utility model is shown by for by using low-temp methanol Absorption removes CO from synthetic gas stream2The utility model absorption tower exemplary embodiment longitudinal cross-section.
Specific embodiment
Absorption tower 1 shown in Fig. 1 is a part for carrying out the device of selective Rectisol technique, such as Liv Ullmann Industrial chemistry encyclopaedia, sixth version are volume 15, page 401, discribed in Figure 46.It is pre- in unshowned absorption tower in Fig. 1 First remove COS/H2The bottom on the synthetic gas 2a of S and trace components inflow absorption tower 1.In many cases, conjunction to be purified At the carbon dioxide content in gas 2a between 5mol% and 50mol%, between especially 20 mol% and 45mol%.Institute Synthetic gas is stated in absorption tower flows upward inside, and by low-temp methanol countercurrent washing, the CO from the gas2By methanol It absorbs.In nethermost tower section 3, synthetic gas initial flow then flows through liquid receipts by structured packing 4 Collect column plate 5 and enter inter-chamber tower section 6, in the inter-chamber tower section 6, synthetic gas flows through structured packing 7 in turn.From that In, gas continues to rise, and flows through column plate 9 in uppermost tower section 8.Remove CO2Synthetic gas 2b inhaling The absorption tower 1 is left at the top for receiving tower 1, and is discharged for further processing or is further processed from the Rectisol device (not shown).In many cases, synthetic gas stream 2b still has the CO of 5ppm to 3mol%2Content.
In uppermost tower section 8, the methanol 10 post-processed by hot recycling is introduced as absorbing medium.In inter-chamber tower In section 6, the mixture quilt of the methanol 11 of the methanol 10 and the flash regeneration additionally injected that are supported in uppermost section 8 For washing the synthetic gas when synthetic gas flows through structured packing 7.
The methanol of load is post-processed by hot recycling and flash regeneration (passing through the gas of decompression discharge dissolution) It is a part of selective Rectisol technique, but not shown in FIG. 1.
The methanol declined from inter-chamber tower section 6 is collected in liquid and collects on column plate 5, and is then discharged from tower 1.It borrows Help cooling equipment 12, again from removing in methanol thitherto by the CO in methanol2Absorption formed heat.Then will Methanol injects lower tower section 3 and is used for washing synthesis gas 2a there.
The methanol used in corresponding column section is evenly distributed over via distribution system 13,14,15 in each case On column plate 9 or structured packing 4,7.
The methanol 16 of load is collected at the bottom 17 on absorption tower 1, and is discharged from the Rectisol device for scheming Processing in 1 in unshowned flash regeneration tower.
Test it has been shown that by with structured packing replace inter-chamber tower section in and lower tower section in column plate, for Identical tower throughput, tower diameter for example can significantly reduce, thus simplify tower component transport and make the buying of tower at This reduction about 15%.
Industrial applicibility
The utility model provides the chance that the absorbability of tower is promoted while keeping tower diameter constant.Therefore, this reality With new beneficial in tower casing component from manufacture position to tower building position rodability.Therefore, the utility model is that have Sharp ground is industrial practical.
Reference number inventory
1 absorption tower
2a, b synthetic gas
3 nethermost tower sections
4 structured packings
5 liquid collect column plate
6 inter-chamber tower sections
7 structured packings
8 uppermost tower sections
9 column plates
The methanol of 10 hot recyclings
The methanol of 11 flash regenerations
12 cooling equipment
The distribution system of 13 cleaning solutions
The distribution system of 14 cleaning solutions
The distribution system of 15 cleaning solutions
The methanol of 16 loads
The bottom of 17 towers.

Claims (7)

1. a kind of absorption tower, the absorption tower be used for by with liquid physics absorbing medium washing synthesis gas stream from the synthesis Carbon dioxide is removed in gas stream, wherein the absorption tower is at least configured as packed column over a part of its length；And And the absorption tower is subdivided into three sections, wherein nethermost section and intermediate section respectively contain structured packing, It is characterized in that, the rule of the nethermost section on the specific surface area of the structured packing of the section of the centre and the absorption tower The ratio of the specific surface area of whole filler is 1.0 to 3.6.
2. absorption tower according to claim 1, which is characterized in that tower diameter is between 1500mm and 6000mm.
3. absorption tower according to claim 1, which is characterized in that tower diameter is between 2800mm and 4800mm.
4. absorption tower according to claim 1, which is characterized in that the specific surface area of the structured packing of the section of the centre Ratio with the specific surface area of the structured packing of the nethermost section on the absorption tower is 1.0 to 2.8.
5. absorption tower according to claim 1, which is characterized in that the packed height of the structured packing of the section of the centre Ratio with the packed height of the structured packing of the nethermost section on the absorption tower is 1.0 to 4.0.
6. absorption tower according to claim 1, which is characterized in that the packed height of the structured packing of the section of the centre Ratio with the packed height of the structured packing of the nethermost section on the absorption tower is 1.5 to 3.0.
7. absorption tower according to claim 1, which is characterized in that the absorption tower additionally includes one or more areas Section, one or more of sections are used for from the COS/H that removing is present in the synthetic gas in synthetic gas2S、NH3, sulphur Alcohol, metal carbonyl and/or other trace components, one or more of sections are arranged at three sections Lower section.
CN201821245199.4U 2017-08-07 2018-08-03 For removing the absorption tower of carbon dioxide from synthetic gas Active CN209567807U (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17400051 2017-08-07
EP17400051.3 2017-08-07

Publications (1)

Publication Number Publication Date
CN209567807U true CN209567807U (en) 2019-11-01

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CN (1) CN209567807U (en)
DE (1) DE202018102916U1 (en)

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