Classifications

• • 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
  • B01D53/1425—Regeneration of liquid absorbents
• • 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
• • 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
  • B01D2258/00—Sources of waste gases
  • B01D2258/02—Other waste gases
  • B01D2258/0283—Flue gases
• • 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
• • 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
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E20/00—Combustion technologies with mitigation potential
  • Y02E20/32—Direct CO2 mitigation

Definitions

• Carbon dioxide is a climate-friendly gas as part of flue gases in fossil combustion processes.
• fossil-fired power plants for the production of electricity generate high amounts of carbon dioxide.
• carbon dioxide must be separated.
• the flue gas in the absorber contacts a selective solvent, an absorbent.
• This carbon dioxide is absorbed from the flue gas.
• the absorber leaves a purified waste gas at the top of the absorber column.
• the carbon dioxide-laden solvent is sent to the desorber where it is regenerated using heat.
• carbon dioxide is expelled from the Lö ⁇ solvents, wherein the desorber at the head of the de sorberkolonne a gas vapor mixture of carbon dioxide and ver ⁇ dampftem solvent leaves.
• This gas-vapor mixture is condensed, resulting in a condensate, which is ⁇ returned to the desorber, and a carbon dioxide remains as a largely pure gas.
• the obtained in the condensate ⁇ sation heat is dissipated to the ambient air.
• the carbon dioxide is then compressed in several stages and can be supplied in the liquid state for storage or recycling.
• the regenerated in the desorber solvent is returned to the absorber and can pick up there again more carbon dioxide from the flue gas.
• heat integration is done in a
• the desorber is also connected downstream via a vapor line, a condenser for condensing vaporized in the desorber absorbent.
• the invention is characterized in that a is varnishtau ⁇ shear provided, which is on the primary side in the steam line and the secondary side in the absorption medium circuit maral- tet, so that heat of condensation is transferred to an absorbent in the absorbent cycle of a vaporized from ⁇ sorbent in the condenser.
• the invention is based on the idea of reducing the heat energy required for desorption by integrating the heat already present in the overall system back into the system. As a result, the total energy demand of the carbon dioxide separation device can be reduced. This is achieved in that heat, which must be Wa ⁇ leads to the condenser, used to preheat the loaded absorbent stream. Compared to a design without the heat integration according to the invention, savings in cooling water, investment costs and energy are to be expected. Since the heat in the condenser to the big ⁇ SEN part is not discharged into the cooling water but to the solvent in the absorbent circulation, cooling, water and therefore operating costs.
• the heat exchanger is secondary där general on, so that loaded by the condensation heat from ⁇ sorbent is be preheated.
• preheating the loading ⁇ NEN solvent mass flow of the central Heat Transf ⁇ ger may, for preheating the laden with the unloaded solvent advertising the smaller dimensions.
• an intercooler is further provided, which is connected in the absorbent circuit in sections parallel to the absorber on the primary side, and is switched on the secondary side in the line for loaded absorbent, so that heat from the intercooler to a laden absorbent to be supplied to the desorber is over ⁇ portable.
• This further supports the preheating of loaded solvent.
• the Kohledioxidabscheidevoriques part of a power plant which includes a fossil-fired combustion process.
• FIG. 3 shows a further development of the carbon dioxide separation device according to the invention according to FIG. 2
• FIG. 1 shows a Kohledioxidabscheidevorraum 1 according to the prior art, with an absorber 3 and a desorber 4, which are ver ⁇ switched together via an absorbent circuit 5.
• the absorber 3 is fed via a flue gas line 11, a carbon dioxide-containing flue gas.
• the carbon dioxide-oxide-containing flue gas is brought into the absorber with a Absorpti ⁇ onsstoff in contact, wherein carbon dioxide is absorbed from the flue gas by the absorbent.
• the Ab ⁇ sorber 3 leaves via a flue gas outlet 12 a purified of carbon dioxide flue gas.
• the laden with carbon dioxide absorbent is passed over ei ⁇ ne line 9 in the desorber 4, where the carbon dioxide is desorbed by boiling the absorbent again.
• a reboiler 13 is provided, which is connected in the desorber, and is supplied with superheated steam.
• the desorber 4 leaves via a steam line 7, a gas and vapor mixture of desorbed carbon dioxide and vaporized absorbent.
• For condensation and recovery Winning solvent is in the steam line 7, a capacitor 6 connected, which in turn is connected via a condensate ⁇ line 15 with the desorber 4.
• a gas line 16 carbon dioxide is in a substantially pure form ausleitbar.
• FIG. 2 shows an embodiment of a carbon dioxide separation device 1 according to the invention.
• a heat exchanger 8 is provided, which is connected on the primary side into the steam line 7 and on the secondary side into the absorption medium circuit 5.
• Kon is characterized ⁇ densations cale of a vaporized absorbent in the capacitor 6 on an absorbent in the absorbent ⁇ circuit 5 transferable.
• 2 shows the connection of the heat exchanger 8 in the line for loaded absorbent 9 of the absorbent cycle 5.
• Da ⁇ by is through the heat of condensation loaded absorption medium ⁇ preheated.
• a resulting in the preheating in the heat exchanger 8 condensate is via a condensate line 17 in the Kondensatlei ⁇ device 15 can be conducted.
• the condensate from the condensate line 17 makes an additional contribution to desorption by desorber 4.
• FIG. 3 shows a further development of the embodiment of a carbon dioxide separation device 1 according to the invention shown in FIG. 2 with heat integration.
• an intercooler 10 is provided, which in the absorbent ⁇ circuit 5 in sections parallel to the absorber 3 maral ⁇ tet primary side and the secondary side is connected in the line for loaded from ⁇ sorbent 9 ,
• heat can be transferred from the intercooler 10 to a loaded absorbent to be supplied to the desorber 4.
• an additional heat exchanger is conceivable, which is connected in series with the heat exchanger 8, and through which the heat is transferable to a loaded absorbent.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Analytical Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Health & Medical Sciences (AREA)
• Biomedical Technology (AREA)
• Environmental & Geological Engineering (AREA)
• Treating Waste Gases (AREA)

Applications Claiming Priority (4)

Publications (1)

Family

ID=48915360

Family Applications (1)

Country Status (2)

Citations (5)

• 2013
  • 2013-01-18 DE DE102013200755A patent/DE102013200755A1/de not_active Withdrawn
  • 2013-01-30 WO PCT/EP2013/051787 patent/WO2013124127A1/fr not_active Ceased

Patent Citations (5)

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