CN207342445U - A kind of indirect heat exchange temp.-changing adsorption carbon trapping system - Google Patents
A kind of indirect heat exchange temp.-changing adsorption carbon trapping system Download PDFInfo
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- CN207342445U CN207342445U CN201720673162.0U CN201720673162U CN207342445U CN 207342445 U CN207342445 U CN 207342445U CN 201720673162 U CN201720673162 U CN 201720673162U CN 207342445 U CN207342445 U CN 207342445U
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Abstract
The utility model discloses a kind of indirect heat exchange temp.-changing adsorption carbon trapping system, including adsorbing cavity, it is characterized in that, the absorption cavity is equipped with air intake valve and outlet valve, there is a heat exchange pipeline through the absorption cavity, adsorbent is filled with the adsorbent chamber body, the rear and front end of the heat exchange pipeline is parallel with high-temperature medium heat source and cryogenic media low-temperature receiver by four-way reversing valve and pipeline.The utility model is designed based on the cyclic process that sorbent material, absorption mutually and based on the physical property of flue gas are built in the circulatory system, it can not only meet the Research Requirements in terms of the thermodynamics of carbon trapping system, and be an ideal scheme of the thermodynamics aspect research for solving carbon trapping technique.
Description
Technical field
It the utility model is related to the thermodynamic study field of carbon trapping technique, more particularly to a kind of indirect heat exchange temp.-changing adsorption
Carbon trapping system.
Background technology
The rising of global carbon dioxide concentration, brings temperature to rise so that global extreme weather increases, and causes ground
The polar ice sheet of ball starts to melt, and sea level rise.Global sea average up 19 centimetres, went up in recent years from 1900
Speed is constantly being accelerated, this is by many island of serious threat and Low Countries.Due to negative tribute of the carbon dioxide to greenhouse effects
Offer, climatic issues are increasingly becoming the focus of global concern.The means for usually alleviating climate change are improved energy conversion efficiency, make
With regenerative resource and collecting carbonic anhydride with sealing up for safekeeping, it is considered as to tackle having for climate change challenge that wherein carbon, which is trapped and sealed up for safekeeping,
One of effect technology behave.
The feasibility of conventional carbon trapping technique more attention location system, without considering the energy consumption of system, causes opening for correlation technique
Fermentation faces commercialization predicament.Such as more ripe solution absorption method is commercialized, its seizure energy consumption is higher, usually catches dioxy per ton
Change carbon energy consumption about 3-4MJ/ton.At present in terms of carbon traps Energy Efficiency Analysis, targetedly instrument or scale-model investigation still in
Exploratory stage.Educational circles is primarily present three class models：(1) gas disjunctive model, this class model are a kind of lumped models, universality compared with
It is good, but excessively simplify.(2) process analysis procedure analysis model, the characteristic of this class model is to the with strong points of case, and shortcoming is universality
Difference, " thing one is discussed ", lacks general character rule and holds.(3) Life cycle or emergy analysis model, such model are derived to product
Environmental emission analysis under big time scale, deficiency is held to the energy matter conversion characteristic details of process.
The high energy consumption issues of relative absorbance carbon trapping technique, absorption carbon trapping technique have self-technique advantage, such as again
Raw heat consumption is low, heat quality requires low, unit capturing ability big and system needed for equipment it is few the advantages that.Inhaled according to desorption process
The difference of attached amount variation pattern, absorption carbon trapping technique are divided into temp.-changing adsorption and pressure-variable adsorption two ways.In recent years, close
The main presentation following characteristics of research invention in carbon dioxide absorbing material and adsorption process field：
(1) some researchs people person attempts to be innovated in terms of carbon dioxide absorbing material.For example, CN103861557A is special
A kind of New Solid amine carbon dioxide absorber is proposed in sharp document, carbon dioxide is reduced using the method for surfactant
Diffusional resistance in solid amine absorption agent, improves the utilization rate of amine, and then improves the absorption property of the carbon dioxide of material.
It is proposed that one kind carries out polymerisation using aniline and Y type molecular sieve, obtains solid particle in CN103203220A patent documents；Will
Solid particle carries out carburizing reagent and obtains carbon dioxide absorber, and the materials synthesis is simple, and performance is better than activated carbon.
A kind of cage type carbon dioxide absorbing material and preparation method thereof is proposed in CN103120931A patent documents, this method includes covering de-
Acidified modified and cage type carbon dioxide absorbing material the synthesis of stone, the payload amount of organic amine exists in the composite material
Between 10~60%, there is good absorption and desorption ability, and have good stability.Disclosed in CN104056598A patent documents
A kind of MOFs group carbonic anhydride adsorption agents, including MOFs and the organic amine for being carried in the duct of MOFs and surface, it is described
The mass ratio of MOFs and organic amine is 0.1~10:1.It is proposed that one kind changes in WO2013US66281 and US09144770 patent documents
Property activated carbon be used for the sorbing material of carbon dioxide pump, which is injected into magnesia in activated carbon, wherein content of magnesia
Account for the 15% of material gross mass.It is proposed a kind of doughnut sorbing material in EP20080772173 patent documents, the material with
Polymer is matrix, can be used for the seizure of smoke carbon dioxide.The domestic and international patent document bag of similar absorption synthetic material
Include：The patents such as WO2013US60721, WO2008US84237, US07288136, CN104437383A and CN102500324A text
Offer.But the technical solution disclosed in patent documents above is the innovation in sorbing material synthetic degree of angle, in specific titanium dioxide
Carbon adsorption process, circulation and system do not relate to.
(2) some researchers attempt to be innovated in terms of carbon dioxide adsorption process.Than being attempted if any researcher two
Innovated on carbonoxide absorption tower structure.Such as notification number is to propose a kind of titanium dioxide in CN203990246U patent documents
Carbon pressure-swing absorber, employs the gas absorption passage of rectangular configuration, and used baffle plate separates, and forms deflector type and fixes absorption
Tower.The advantages such as the structure has good gas homogeneity, gas long flow path, adsorbent utilization rate high and bed is stablized.Other
Researcher attempts absorption carbon trapping system and other carbon emission system integrations.Such as propose one in CN104437060A patent documents
Absorption carbon trapping system, is applied to the carbon emission system of sugar refinery by kind sugar refinery carbon dioxide recovery activation utilization method and apparatus
In, realize the system integration and reduce carbon emission.Itd is proposed in US09023244 patent documents a kind of using temp.-changing adsorption trapping
Carbon dioxide in the flue gas of hydrogen plant, this method have the carbon dioxide purity of higher compared to traditional MDEA absorption processes.
But the technical solution disclosed in patent documents above is the innovation of specific carbon dioxide adsorption system, is ground in thermodynamics
Study carefully and do not related in angle and method.
In addition, on carbon pump concept biological field study be biosphere Carbon balance, such as WO2007/014349 is special
The method that the carbon dioxide in isolation aqueous environments is provided in sharp document, the PM that this method produces is with apparently higher than by biological carbon
The rate sedimentation for the PM that other components in pump produce.In addition, chemical field has a kind of concept of decarburization pump, it is simply a kind of to pump,
Such as a kind of decarburization pump leakage-resisting technology is provided in CN101560991 patent documents, applied to the contact surface between sealed object,
Prevent unnecessary leakage.A kind of synthesis ammonia decarbonizing flash steam recovery device involved in CN201988310U patent documents, including
Decarburization pump, high pressure flash aspiration tower, washer and separator etc., which has fully recycled hydrogen, nitrogen in decarbonizing flash steam
Available gas, adds synthesis hydrazine yield, while has also recycled carbon dioxide to increase urea production.The carbon pump of the present invention
Refer to the carbon trapping system or device in the certain gas concentration lwevel gradient of the manufacture and maintenance of thermodynamic study.With existing carbon
Pump concept is compared, and thermodynamics carbon pump is a kind of research method of innovation.
To sum up, existing related patents can not reach the target of exploitation ideal thermodynamic research method described above.Tool
For body, the model of the effectiveness analysis of carbon trapping needs had to circulation aspect to analyse in depth, and is engaged in absorption carbon trapping
The researcher of technology has appreciated that the importance of thermodynamic study, and crossing for these two aspects forces industry personnel deeply to think deeply
A problem be：The construction work of thermodynamics carbon pump circulation is unfolded exemplified by carbon traps as how adsorbed.
Utility model content
In order to solve the above-mentioned technical problem, the utility model proposes a kind of indirect heat exchange temp.-changing adsorption carbon trapping system,
Including adsorb cavity, it is characterised in that it is described absorption cavity be equipped with air intake valve and outlet valve, have a heat exchange pipeline through
The absorption cavity, the adsorbent chamber body is interior to be filled with adsorbent, and the rear and front end of the heat exchange pipeline is commutated by four-way
Valve and pipeline are parallel with high-temperature medium heat source and cryogenic media low-temperature receiver.
Compared with prior art, the beneficial effects of the utility model are：
The utility model is that one built based on the physical property of sorbent material, absorption phase and flue gas in the circulatory system follows
Designed based on ring process, can not only meet the Research Requirements in terms of the thermodynamics of carbon trapping system, and be to solve carbon
An ideal scheme of research in terms of the thermodynamics of trapping technique.
Brief description of the drawings
Fig. 1 is the utility model indirect heat exchange temp.-changing adsorption carbon trapping system schematic diagram；
In figure：1- adsorbs cavity, 2- adsorbents, 3- air intake valves, 4- outlet valves, 5- cryogenic media low-temperature receivers, 6- high temperature
Medium heat source, 7,8- four-way reversing valves, 9- heat exchanging pipes.
Fig. 2 is the logical schematic that the thermodynamics carbon pump circulation of Tthe utility model system is built；
Fig. 3 is the schematic diagram of cyclic process temp.-changing adsorption between room temperature, high temperature isothermal curve of Tthe utility model system；
Fig. 4 is the signal of temp.-changing adsorption of the cyclic process of Tthe utility model system under thermodynamic parameter logarithmic coordinates
Figure.
Embodiment
Technical solutions of the utility model are described in further detail with specific embodiment below in conjunction with the accompanying drawings, it is described
Specific embodiment is only explained the utility model, is not intended to limit the utility model.
Illustrate the utility model indirect heat exchange temp.-changing adsorption carbon trapping system by taking the pending flue gas of power plant as an example, such as Fig. 1 institutes
Show, which includes absorption cavity 1, and the absorption cavity 1 is equipped with air intake valve 3 and outlet valve 4, has a heat exchange pipeline 9 to pass through
The absorption cavity 1 is through at, is filled with adsorbent 2 in the absorption cavity 1, the rear and front end of the heat exchange pipeline 9 passes through
Four-way reversing valve and pipeline are parallel with high-temperature medium heat source 6 and cryogenic media low-temperature receiver 5.
The pending flue gas of power plant is mainly made of nitrogen and carbon dioxide, is caught using above-mentioned indirect heat exchange temp.-changing adsorption carbon
Collecting system, wherein,
Adsorption process：The air intake valve 3 adsorbed on cavity 1 and outlet valve 4 are opened, pass through 9 both ends of heat exchanging pipe
Four-way reversing valve 7 and 8 makes the heat exchanging pipe 9 through absorption cavity 1 be connected with the cryogenic media low-temperature receiver 5, the flue gas of low temperature by
Air intake valve 3, which is passed through, adsorbs cavity 1, and the carbon dioxide in flue gas is adsorbed by adsorbent 2, remaining tail gas rich in nitrogen is by outlet
Valve 4 is discharged, whole adsorption process, and low temperature cold source medium is continually fed into absorption cavity 1；
The realization of warm is：The air intake valve 3 adsorbed on cavity 1 and outlet valve 4 are closed, by four-way reversing valve
Door 7 and 8 is changed direction, and the heat exchanging pipe 9 through absorption cavity 1 is connected with high-temperature medium heat source 6, adsorbent 2 is situated between by high temperature
Matter heat source 6 heats；
Desorption process：The air intake valve 3 adsorbed on cavity 1 and outlet valve 4 are opened, it is high that absorption cavity 1 continues access
Warm medium heat source 6, purging nitrogen are passed through in absorption cavity 1 by air intake valve 3, and the carbon dioxide adsorbed is in high-temperature medium heat source
Discharged in heating, high concentration carbon dioxide is discharged by outlet valve 4；
Precooling process：The air intake valve 3 adsorbed on cavity 1 and outlet valve 4 are closed, by four-way reversing valve door 7 and 8
Change direction so that the heat exchanging pipe 9 through absorption cavity 1 is connected with the cryogenic media low-temperature receiver 5, and absorption cavity 1 is cooled to
Environment temperature.
By a series of series connection of thermal processions (such as absorption and regenerative process), carbon dioxide in flue gas gas is finally realized
The separation of body.
The heat source that structure is circulated in above-described embodiment can be that low-temperature heat source and the steam turbine of coal-burning power plant are taken out in solar energy
Vapour etc..Low-temperature receiver can be the cooling water of room temperature.
The design basis of the utility model is thermodynamics carbon pump circulation construction method as shown in Figure 2, its basis is physical property, main
There are the physical property such as dielectric material and gas.Thereafter, in related property data basis, rational thermal procession is designed, and coordinate
Cooling and Heat Source carries out " positioning ".Then, multiple processes are concatenated and are built into circulation.Wherein, exemplary thermal process has heat absorption, heat release, suction
Desorption etc. is echoed, and typical heat source has low-temperature heat source and coal-burning power plant's extracted steam from turbine etc. in solar energy.Finally, the structure of circulation
Serve core objective --- Energy Efficiency Analysis, this demand with heat engine, heat pump when thermodynamics classical concept proposes be it is consistent,
That is the efficiency of research process or circulation.Indirect heat exchange temp.-changing adsorption carbon trapping technique mainly includes adsorption process, warm, takes off
Attached process and precooling process.Wherein, the adsorbent bed of preheating and precooling process realizes the change of temperature using indirect heat exchange mode.
Based on the introduction of above physical property, process and Cooling and Heat Source, thermodynamics carbon pump circulation structure can be opened according to following explanation
Exhibition.
One cyclic process, such as Fig. 3 mutually and based on the physical property of flue gas, are built by sorbent material, absorption in the circulatory system
Shown, the cyclic process is denoted as a little 1 → 2 → 3 → 4 → 1；Wherein, point 1 → 2 be adsorption process, 2 → point of point
3 be warm, and point 3 → 4 be desorption process, put 4 → 1 it is precooling process；The cyclic process is inhaled with carbon dioxide
The relation of attached amount-carbon dioxide partial pressure-temperature three is presented, and according to cyclic process design the utility model proposes it is indirect
Exchange heat temp.-changing adsorption carbon trapping system；The definite of the premises be：
Taken on sorbent material room temperature isothermal curve in two corresponding to adsorption process carbon dioxide in flue gas partial pressure value
The point of carbonoxide saturated extent of adsorption, is denoted as a little 5；Taken on sorbent material high temperature isothermal curve two in desorption process product gas
The point of carbon dioxide saturated extent of adsorption corresponding to carbonoxide partial pressure value, is denoted as a little 4；Obtained according to formula (1) in adsorption process
The point of the actual adsorbance of carbon dioxide corresponding to carbon dioxide in flue gas partial pressure value, is denoted as a little 2；
In formula (1)：RCO2The recovery rate of CO 2 of carbon trapping system, WCacThe carbon dioxide work of actual adsorption process is held
Amount, WCidThe carbon dioxide displacement volume of Ideal adsorption process, qsta,5It is in adsorption process carbon dioxide in flue gas partial pressure value institute
Corresponding carbon dioxide saturated extent of adsorption, qmin,1Carbon dioxide in desorption process product gas corresponding to carbon dioxide partial pressure value
Saturated extent of adsorption, qmax,2It is in the actual adsorbance of carbon dioxide corresponding to adsorption process carbon dioxide in flue gas partial pressure value；
Cross and a little 2 make horizontal line X1, cross point 2 and make plumb line Y1, cross point 4 and make horizontal line X2, cross point 4 and make plumb line Y2；It is horizontal
Line X1 and plumb line Y2 crosspoints are denoted as a little 3；Horizontal line X2 and plumb line Y1 crosspoints are denoted as a little 1.
Each state point of the thermodynamics carbon pump circulation of indirect heat exchange temp.-changing adsorption carbon trapping technique all determines.Carbon dioxide
The evaluation index of separating property is the recovery rate of CO 2 obtained using formula (1).
Thermodynamics carbon pump circulation evaluation method mainly has minimum separation work(and second law separative efficiency.Wherein, minimum point
It is the perfect gaseous mixture power consumption for reversible separation process without chemical reaction, its physics under the conditions of isothermal and isobaric from work(
Meaning is that mixed gas realizes specified separated complexity.Minimum separation work(is unrelated with the path of separation process, only with separating
The first last current state of process is related, i.e., the minimum separation work(during carbon trapping is only related with three procedure parameters, is point respectively
From temperature, initial gas concentration lwevel and the separation process rate of recovery.It is as follows that it defines calculating：
Wmin=G (T1,yCO2,RCO2) (2)
In formula (2), WminIt is the minimum separation work(during carbon trapping；T1Refer to separation process temperature；yCO2Refer to flue gas
In initial gas concentration lwevel；RCO2The recovery rate of CO 2 of carbon trapping system.
Second law separative efficiency is the net amount of the system input available energy of ideal process minimum separation work(and real process
Between ratio.Its calculation formula is as follows：
In formula (3), η2ndRefer to second law separative efficiency；T0Refer to environment temperature；TLRefer to the temperature of cryogenic media heat source
Degree；THRefer to the temperature of high-temperature medium heat source；QLRefer to heat of the separation process from cryogenic media heat source to Environment release；QHIt is
Refer to the heat that separation process is absorbed from high-temperature medium heat source；WSRefer to the shaft work of extraneous input.
The cyclic process can also be changed by the relation of carbon dioxide adsorption-carbon dioxide partial pressure-temperature three
To be presented with the relation of negative reciprocal-carbon dioxide adsorption three to numerical value-temperature of carbon dioxide partial pressure value.Fig. 4
It is the display situation under thermodynamic parameter logarithmic coordinates.
Indirect heat exchange temp.-changing adsorption carbon trapping technique thermodynamics carbon pump circulation structure Basic Physical Properties have sorbent material,
The physical property such as absorption phase and source of the gas.Wherein sorbent material can be amino modified material, its specific heat is 2.07kJ/kgK, described normal
Warm isothermal curve and high temperature isothermal curve can be fitted by Toth models.Absorption is mutually calculated according to gaseous carbon dioxide, gas
The specific heat of state carbon dioxide is 0.86kJ/kgK.The fitting formula of Toth models is as follows：
Formula (4) is into formula (7), PCO2It is the partial pressure of adsorption process carbon dioxide, T0It is the initial temperature of adsorption process,
T is the temperature of adsorption process, and H is heat of adsorption (being 60kJ/mol in the present embodiment)；B0、t0、D、n0It is fitting parameter with A, institute
There is fitting parameter to survey corresponding isothermal curve by thermogravimetry to obtain, fitting parameter B in the present embodiment0、t0、 D、n0With A's
Concrete numerical value is 2.25,0.422,0.949,1.97 and 2.37 respectively.
Calculated through formula (1), formula (2) and formula (3), the recovery rate of CO 2 of system as shown in Figure 1 is 83.48%；Circulation
Minimum separation work(be 162.93kJ/kg；The second law separative efficiency of circulation is 18.68%.It can be seen by above-mentioned data
Go out by thermodynamics carbon pump circulation construction method design the utility model indirect heat exchange temp.-changing adsorption carbon trapping system be according to
" physical property-process-Cooling and Heat Source-circulation " order completes the structure of thermodynamics carbon pump circulation, can be used for the heat for investigating circulation efficiency
Mechanics study.
Although the utility model is described above in conjunction with attached drawing, the utility model is not limited to above-mentioned
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, the ordinary skill of this area
Personnel are under the enlightenment of the utility model, in the case where not departing from the utility model aims, can also make many variations, this
Belong to a bit within the protection of the utility model.
Claims (1)
1. a kind of indirect heat exchange temp.-changing adsorption carbon trapping system, including absorption cavity (1), it is characterised in that the absorption cavity
(1) air intake valve (3) and outlet valve (4) are equipped with, has a heat exchange pipeline (9) through the absorption cavity (1), the absorption
Adsorbent (2) is filled with cavity (1), the rear and front end of the heat exchange pipeline (9) is in parallel by four-way reversing valve and pipeline
There are high-temperature medium heat source (6) and cryogenic media low-temperature receiver (5).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021008242A1 (en) * | 2019-07-18 | 2021-01-21 | 天津大学 | Method for constructing thermodynamic cycle of carbon capture technology using chemical absorption method |
| CN113289452A (en) * | 2021-06-28 | 2021-08-24 | 北京德润晨环保科技有限公司 | Flue gas carbon dioxide recovery process |
| CN115031560A (en) * | 2022-04-28 | 2022-09-09 | 哈尔滨工业大学 | Sweeping type gas-heat common storage device and heat exchange system |
-
2017
- 2017-06-09 CN CN201720673162.0U patent/CN207342445U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021008242A1 (en) * | 2019-07-18 | 2021-01-21 | 天津大学 | Method for constructing thermodynamic cycle of carbon capture technology using chemical absorption method |
| CN113289452A (en) * | 2021-06-28 | 2021-08-24 | 北京德润晨环保科技有限公司 | Flue gas carbon dioxide recovery process |
| CN115031560A (en) * | 2022-04-28 | 2022-09-09 | 哈尔滨工业大学 | Sweeping type gas-heat common storage device and heat exchange system |
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Address after: 300350 Haijing garden, Haihe Education Park, Jinnan, Tianjin, 135, Tianjin University. Patentee after: Tianjin University Address before: 300072 Tianjin City, Nankai District Wei Jin Road No. 92 Patentee before: Tianjin University |
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Granted publication date: 20180511 Termination date: 20200609 |