CN108201785A - A kind of smoke carbon dioxide absorption plant based on two-phase absorbent - Google Patents
A kind of smoke carbon dioxide absorption plant based on two-phase absorbent Download PDFInfo
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- CN108201785A CN108201785A CN201810104608.7A CN201810104608A CN108201785A CN 108201785 A CN108201785 A CN 108201785A CN 201810104608 A CN201810104608 A CN 201810104608A CN 108201785 A CN108201785 A CN 108201785A
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- Prior art keywords
- phase
- absorption tower
- absorbent
- temperature absorption
- splitter
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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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The present invention relates to a kind of smoke carbon dioxide absorption plant based on two-phase absorbent, including high temperature absorption tower and low temperature absorption tower；High temperature absorption tower lower part is equipped with smoke inlet, and flue gas is sent to the lower part of low temperature absorption tower by flue by top, and bottom is equipped with the first phase-splitter；Light phase is sent to low temperature absorption tower top by the light phase in first phase-splitter by the first absorbent pipeline；Interstage cooler is set on the first absorbent pipeline；The low temperature absorption tower bottom is equipped with the second phase-splitter, and light phase is sent to high temperature absorption tower top by the light phase in second phase-splitter by the second absorbent pipeline.The device uses double tower scheme, tower height is reduced, so as to reduce the cost of investment on absorption tower.
Description
Technical field
The present invention relates to CO2Trapping field, and in particular to a kind of smoke carbon dioxide based on two-phase absorbent absorbs dress
It puts.
Background technology
Global warming causes human survival and social development to face a severe challenge, and is current great ring urgently to be resolved hurrily
Border problem.Cope with Global climate change, it is important to reduce the discharge of greenhouse gases, particularly carbon dioxide.It was held in 2009
World Climate Conference on, the Chinese government makes the formal commitment, to the year two thousand twenty unit GDP discharge CO2Compared under 2005
40-45% drops, this brings huge challenge to China's related industry.In numerous CO2In emission-reduction technology, chemical absorption method is in work
It is applied in industry.
The liquid-liquid diphase absorbent proposed in recent years is absorbing CO2After spontaneously form two layers of liquid phase of liquid liquid, and absorb CO2's
It is enriched in lower floor, it is only necessary to lower floor's liquid phase be regenerated, can realize the CO that absorbent is significantly increased2Load is reduced to evaporate and be dived
Heat and heating sensible heat energy consumption, realize low energy consumption CO2Trapping is expected to be applied to CO in extensive coal-fired plant flue gas2Trapping.
Using the flue gas CO of two-phase absorbent2Trap process system, two-phase absorbent and CO2Reaction belongs to fast reaction,
Reach more than 80% removal efficiency, CO2Absorption tower needs more than 15m packed heights, it is contemplated that absorbent has corrosivity, it is necessary to adopt
With the composition of tower shell material of 304/316L materials, lead to CO2Absorption tower investment is huge.
Two-phase absorbent absorbs CO2Afterwards, viscosity increases rapidly, and leads to CO2A high phase (heavy phase) the pumping energy consumption of load significantly increases
Greatly, the poor rich liquid heat exchanger coefficient of heat transfer declines, and heat exchange area is caused to increased dramatically.To improve bottom of towe two-phase absorbent CO2It absorbs
Absorbent out of tower is extracted out and is cooled to 30~40 DEG C, then pumped back absorption tower by load, generally use cascade EDFA technique
It is interior.Under cryogenic conditions, absorbent has higher CO2Load, but lower temperature leads to the heavy phase viscosity increase of phase-splitter bottom.Cause
This, it would be highly desirable to develop a kind of novel smoke carbon dioxide absorption plant.
Invention content
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of flue gas titanium dioxide based on two-phase absorbent
Carbon absorption device using double tower scheme, reduces tower height, so as to reduce the cost of investment on absorption tower.
Technical solution provided by the present invention is：
A kind of smoke carbon dioxide absorption plant based on two-phase absorbent, including high temperature absorption tower and low temperature absorption tower；
High temperature absorption tower lower part is equipped with smoke inlet, and flue gas is sent to low temperature absorption tower by top by flue
Lower part, bottom be equipped with the first phase-splitter；Light phase is sent by the light phase in first phase-splitter by the first absorbent pipeline
To low temperature absorption tower top；Interstage cooler is set on the first absorbent pipeline；
The low temperature absorption tower bottom is equipped with the second phase-splitter, and the light phase in second phase-splitter passes through the second absorbent
Light phase is sent to high temperature absorption tower top by pipeline.
In above-mentioned technical proposal, two-phase absorbent is entered by high temperature absorption tower top, after absorbent is reacted with desulfurization fume
The split-phase in the first phase-splitter of high temperature absorb the bottom of the tower, light phase enters low temperature absorption tower top by interstage cooler, with bottom
Rise desulfurization fume and carry out absorbing reaction again, split-phase, light phase return high again in the second phase-splitter of low temperature absorption tower bottom
Warm absorption tower.The heavy phase of high temperature absorption tower and low temperature absorption tower bottom then enters desorber and carries out desorption and regeneration.
Desulfurization fume is then entered by high temperature absorption tower lower part smoke inlet, after being reacted on high temperature absorption tower with absorbent, by
The lower part of low temperature absorption tower is sent at the top of high temperature absorption tower by flue, continuation is reacted with absorbent, later from low temperature
It is arranged outside the tower top of absorption tower.The technical solution uses double tower scheme, can be effectively reduced tower height.
Preferably, the high temperature absorption tower further includes the first packing section, first packing section is located at the first phase-splitter
Top.
Preferably, first packing section is corrugated board structures structured packing, material is by the poly- of grafting hydrophilic group
Propylene is blended with plain polypropylene, suppresses.
Preferably, the tower height on the high temperature absorption tower is 7-9m, the height of first packing section is 3-5m.
Preferably, the smoke inlet is between the first packing section and the first phase-splitter；The two-phase on high temperature absorption tower
Absorbent entrance is set to the first packing section top, the second absorbent pipeline and the two-phase absorbent entrance on high temperature absorption tower
Connection.
Preferably, the low temperature absorption tower further includes top valve plate and the second packing section, second packing section
Between top valve plate and the second phase-splitter.
Preferably, the top valve plate includes circulating water pipeline, circulating pump and cooler.Top valve plate drop
Low flue-gas temperature, the two-phase absorbent carried secretly in recovered flue gas.
Preferably, the tower height of the low temperature absorption tower is 11-13m, the height of second packing section is 5-7m.
Preferably, the two-phase absorbent entrance of the low temperature absorption tower is arranged on top valve plate and the second packing section
Between；The first absorbent pipeline is connect with the two-phase absorbent entrance of low temperature absorption tower.
Preferably, the high temperature absorption tower and low temperature absorption tower use fiberglass composition of tower shell material.
Compared with the existing technology, beneficial effects of the present invention are embodied in：
(1) smoke carbon dioxide absorption plant provided by the present invention, due to reducing tower height using double tower scheme so that
Fiberglass scheme may be used in tower body, so as to reduce the cost of investment on absorption tower.
(2) smoke carbon dioxide absorption plant provided by the present invention, using double tower scheme, there is provided cascade EDFAs simultaneously
The problem of device solves two-phase absorbent viscosity height, and reaction rate is slower in absorption tower.
Description of the drawings
Fig. 1 is the structure diagram of the smoke carbon dioxide absorption plant based on two-phase absorbent.
Wherein, 1, high temperature absorption tower；2nd, low temperature absorption tower；3rd, the first packing section；3 ', second packing section；4th, the first split-phase
Device；5th, the second phase-splitter；6th, interstage cooler；7th, the first absorbent pipeline；8th, the second absorbent pipeline；9th, flue；10、
Circulating pump；10 ', circulating pump；10 ", circulating pump；11st, top valve plate；12nd, cooler.
Specific embodiment
With reference to specific embodiment, the invention will be further described.
As shown in Figure 1, smoke carbon dioxide absorption plant includes high temperature absorption tower 1 and low temperature absorption tower 2.
Wherein, 1 bottom of high temperature absorption tower is equipped with the first phase-splitter 4, and the first packing section 3 is equipped in the middle part of tower.Smoke inlet
It is arranged between the first packing section 3 and the first phase-splitter 4, top is equipped with exhanst gas outlet, and the two-phase absorbent on high temperature absorption tower 1 enters
Mouth is set to 3 top of the first packing section, and bottom of towe is equipped with heavy out.The whole tower height in high temperature absorption tower 1 is 8m, the first packing section 3
Height be 4m.High temperature absorption tower 1 uses fiberglass composition of tower shell material, and the first packing section 3 uses corrugated board structures structured packing,
Material is blended with plain polypropylene by the polypropylene of grafting hydrophilic group, suppressed, 250XY and 350XY models may be used.
Low temperature absorption tower 2 includes top valve plate 11, the second packing section 3 ' and the second phase-splitter 5.Low temperature absorption tower 2 is whole
Body tower height is 12m, and the height of the second packing section 3 ' is 6m.Low temperature absorption tower 2 can be identical with the filler on high temperature absorption tower 1, the
Two packing sections 3 ' use corrugated board structures structured packing, and material is total to by the polypropylene of grafting hydrophilic group with plain polypropylene
It mixes, suppress, 350XY and 500XY models may be used.Equally, composition of tower shell material can also be identical, using fiberglass tower body material
Material.
Top valve plate 11 includes circulating water pipeline, circulating pump 10 " and cooler 12.The two of low temperature absorption tower 2 are attracting
Agent entrance is received to be arranged between 11 and second packing section 3 ' of valve plate of top.2 top of low temperature absorption tower is again provided with flue gas and goes out
Mouthful, bottom is equipped with heavy out, and smoke inlet is then arranged between the second packing section 3 ' and the second phase-splitter 5.
Light phase, is sent to by the light phase in the first phase-splitter 4 of 1 bottom of high temperature absorption tower by the first absorbent pipeline 7
The two-phase absorbent entrance on 2 top of low temperature absorption tower.First absorbent pipeline 7 is equipped with circulating pump 10 and interstage cooler 6.High temperature
Flue gas is sent to the smoke inlet of 2 lower part of low temperature absorption tower by flue 9 by 1 top of absorption tower.And 2 bottom of low temperature absorption tower
Light phase, then is sent to the two of 1 top of high temperature absorption tower by the light phase in second phase-splitter 5 in portion by the second absorbent pipeline 8
Phase absorbent entrance is again provided with circulating pump 10 ' on the second absorbent pipeline 8.
In addition, the heavy phase after the first phase-splitter 4 and the separation of the second phase-splitter 5 is handled and then secondary is passed through by desorber
To the second absorbent pipeline 8, the two-phase on 1 top of high temperature absorption tower is sent to after being mixed with the light phase in the second absorbent pipeline 8
Absorbent entrance.
The course of work：
Two-phase absorbent uses 30-40wt% amine aqueous solutions, is entered by the two-phase absorbent entrance on 1 top of high temperature absorption tower,
Temperature is controlled at 50-70 DEG C.40-60 DEG C of the temperature of desulfurization fume enters from the smoke inlet of 1 lower part of high temperature absorption tower.High temperature
Absorption tower 1 bottom temp control CO in 50-80 DEG C, desulfurization fume2Split-phase is generated after being reacted with two-phase absorbent, due to light phase
CO2Load is small, and density, viscosity are small, positioned at the upper strata of the first phase-splitter 4, and the CO of heavy phase2Load is high, and density, viscosity are higher,
Positioned at 4 lower floor of the first phase-splitter, heavy phase is discharged into follow-up desorption and regeneration by the heavy out of bottom of towe and handles.
The light phase on 4 upper strata of the first phase-splitter is then sent into interstage cooler 7 by circulating pump 10 and is cooled to 40 DEG C, light phase due to
CO2Load is relatively low, and viscosity is low, and the light phase after cooling is sent into 2 top of low temperature absorption tower.Desulfurization fume is by high temperature absorption tower 1
After reason, enter low temperature absorption tower 2 from 2 lower part smoke inlet of low temperature absorption tower.Desulfurization fume continues with two-phase absorbent in low temperature
Absorption tower 2 is reacted, and absorbs CO2Two-phase absorbent afterwards continues split-phase, 2 bottom of low temperature absorption tower in the second phase-splitter 5
Light phase goes successively to high temperature absorption tower 1 by circulating pump 10 ', and heavy phase is then discharged into follow-up desorption by the heavy out of bottom of towe
Regeneration treatment.
2 top setting top valve plate 11 of low temperature absorption tower, recirculated water and flue gas heat and mass on column plate, flue gas temperature
Degree reduces, and carries two-phase absorbed dose of radiation and reduces, so as to reduce absorbent waste.
Claims (6)
1. a kind of smoke carbon dioxide absorption plant based on two-phase absorbent, which is characterized in that including high temperature absorption tower and low
Warm absorption tower；
High temperature absorption tower lower part is equipped with smoke inlet, and flue gas is sent under low temperature absorption tower by top by flue
Portion, bottom are equipped with the first phase-splitter；Light phase is sent to low by the light phase in first phase-splitter by the first absorbent pipeline
Warm absorption tower top；Interstage cooler is set on the first absorbent pipeline；
The low temperature absorption tower bottom is equipped with the second phase-splitter, and the light phase in second phase-splitter passes through the second absorbent pipeline
Light phase is sent to high temperature absorption tower top.
2. the smoke carbon dioxide absorption plant according to claim 1 based on two-phase absorbent, which is characterized in that described
High temperature absorption tower further includes the first packing section, and first packing section is located at the first phase-splitter top.
3. the smoke carbon dioxide absorption plant according to claim 2 based on two-phase absorbent, which is characterized in that described
Smoke inlet is between the first packing section and the first phase-splitter；The two-phase absorbent entrance on high temperature absorption tower is set to first and fills out
Expect section top, the second absorbent pipeline is connect with the two-phase absorbent entrance on high temperature absorption tower.
4. the smoke carbon dioxide absorption plant according to claim 1 based on two-phase absorbent, which is characterized in that described
Low temperature absorption tower further includes top valve plate and the second packing section, second packing section are located at top valve plate and second
Between phase-splitter.
5. the smoke carbon dioxide absorption plant according to claim 4 based on two-phase absorbent, which is characterized in that described
Top valve plate includes circulating water pipeline, circulating pump and cooler.
6. the smoke carbon dioxide absorption plant according to claim 4 based on two-phase absorbent, which is characterized in that described
The two-phase absorbent entrance of low temperature absorption tower is arranged between top valve plate and the second packing section；First absorber tube
Road is connect with the two-phase absorbent entrance of low temperature absorption tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810104608.7A CN108201785A (en) | 2018-02-02 | 2018-02-02 | A kind of smoke carbon dioxide absorption plant based on two-phase absorbent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810104608.7A CN108201785A (en) | 2018-02-02 | 2018-02-02 | A kind of smoke carbon dioxide absorption plant based on two-phase absorbent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108201785A true CN108201785A (en) | 2018-06-26 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810104608.7A Pending CN108201785A (en) | 2018-02-02 | 2018-02-02 | A kind of smoke carbon dioxide absorption plant based on two-phase absorbent |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110115913A (en) * | 2019-06-20 | 2019-08-13 | 中国华能集团清洁能源技术研究院有限公司 | A kind of carbon dioxide capture system and method inhibiting absorbent volatilization |
| CN110960956A (en) * | 2019-12-02 | 2020-04-07 | 中国石油天然气集团有限公司 | Be applicable to phase transition absorbent and absorb CO in flue gas2Method and system |
| US20220176312A1 (en) * | 2020-12-07 | 2022-06-09 | Carbon Engineering Ltd. | Capturing carbon dioxide |
| US20230158446A1 (en) * | 2008-08-21 | 2023-05-25 | Carbon Engineering Ltd. | Carbon Dioxide Capture Method and Facility |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230158446A1 (en) * | 2008-08-21 | 2023-05-25 | Carbon Engineering Ltd. | Carbon Dioxide Capture Method and Facility |
| CN110115913A (en) * | 2019-06-20 | 2019-08-13 | 中国华能集团清洁能源技术研究院有限公司 | A kind of carbon dioxide capture system and method inhibiting absorbent volatilization |
| CN110960956A (en) * | 2019-12-02 | 2020-04-07 | 中国石油天然气集团有限公司 | Be applicable to phase transition absorbent and absorb CO in flue gas2Method and system |
| CN110960956B (en) * | 2019-12-02 | 2023-12-29 | 中国石油天然气集团有限公司 | CO in flue gas is absorbed to applicable phase transition absorbent 2 Method and system of (2) |
| US20220176312A1 (en) * | 2020-12-07 | 2022-06-09 | Carbon Engineering Ltd. | Capturing carbon dioxide |
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Application publication date: 20180626 |