WO2023140440A1 - 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템 - Google Patents
시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템 Download PDFInfo
- Publication number
- WO2023140440A1 WO2023140440A1 PCT/KR2022/008634 KR2022008634W WO2023140440A1 WO 2023140440 A1 WO2023140440 A1 WO 2023140440A1 KR 2022008634 W KR2022008634 W KR 2022008634W WO 2023140440 A1 WO2023140440 A1 WO 2023140440A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- carbon dioxide
- reactant
- carbon
- basic alkali
- cement manufacturing
- Prior art date
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 458
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 229
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 229
- 239000004568 cement Substances 0.000 title claims abstract description 95
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 68
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 67
- 238000004064 recycling Methods 0.000 title claims abstract description 8
- 239000000376 reactant Substances 0.000 claims abstract description 112
- 239000000243 solution Substances 0.000 claims abstract description 35
- 239000011259 mixed solution Substances 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 239000002699 waste material Substances 0.000 claims abstract description 14
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003513 alkali Substances 0.000 claims description 83
- 239000007789 gas Substances 0.000 claims description 83
- 238000010521 absorption reaction Methods 0.000 claims description 51
- 239000000203 mixture Substances 0.000 claims description 44
- 238000003860 storage Methods 0.000 claims description 36
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 34
- 238000001354 calcination Methods 0.000 claims description 33
- 238000011084 recovery Methods 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 17
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 17
- 239000011734 sodium Substances 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 238000011068 loading method Methods 0.000 claims description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 9
- 239000000446 fuel Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 3
- 229910004844 Na2B4O7.10H2O Inorganic materials 0.000 claims description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 3
- 229910021538 borax Inorganic materials 0.000 claims description 3
- 229910052793 cadmium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052745 lead Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 239000004328 sodium tetraborate Substances 0.000 claims description 3
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000012466 permeate Substances 0.000 claims 1
- 238000010304 firing Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 235000019738 Limestone Nutrition 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 239000006028 limestone Substances 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000005431 greenhouse gas Substances 0.000 description 4
- 239000002803 fossil fuel Substances 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000013373 food additive Nutrition 0.000 description 2
- 239000002778 food additive Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052900 illite Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
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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
- B01D53/1456—Removing acid components
- B01D53/1475—Removing carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or 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
-
- 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
- B01D53/1412—Controlling the absorption process
-
- 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
- B01D53/1493—Selection of liquid materials for use as 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
- B01D53/34—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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/24—Multiple arrangement thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/364—Avoiding environmental pollution during cement-manufacturing
- C04B7/367—Avoiding or minimising carbon dioxide emissions
-
- 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
-
- 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
- B01D2258/0233—Other waste gases from cement factories
-
- 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
Definitions
- the present invention relates to a carbon dioxide capture and carbon resource recovery system for a cement manufacturing facility, and more particularly, to a carbon dioxide capture and carbon resource recovery system for a cement manufacturing facility that can remove carbon dioxide from a cement manufacturing facility and at the same time convert it into other useful materials by capturing and converting carbon dioxide in exhaust gas using a basic alkali mixture into a carbon resource.
- Cement which is essential for manufacturing concrete used in most buildings, is produced in excess of 4 billion tonnes annually on a global basis. Cement undergoes a process of heating limestone raw materials in the manufacturing process, and at this time, a large amount of carbon dioxide (CO 2 ), a representative greenhouse gas, is emitted.
- CO 2 carbon dioxide
- limestone (CaCO 3 ) which is the main raw material of cement, is preheated by a preheater, and then calcined in a calcination furnace and a cyclone at the bottom of the preheater, and then fired in a rotary kiln, which is a sintering furnace.
- Cement clinker is manufactured by firing in a high-temperature atmosphere of about 1450 ° C.
- the present invention has been devised to solve the above problems, and an object of the present invention is to provide a system for reducing carbon dioxide in exhaust gas generated in a cement manufacturing process.
- another object of the present invention is to provide a carbon dioxide and carbon resource recycling system for a cement manufacturing facility that can remove carbon dioxide and at the same time convert it into other useful materials by capturing and converting carbon dioxide in exhaust gas using a basic alkali mixture into a carbon resource.
- another object of the present invention is to capture carbon dioxide using a basic alkali mixed solution that solves the disadvantages of an alkanolamine aqueous solution, which is a carbon dioxide absorbent widely used in the prior art, thereby securing economic feasibility compared to conventional technologies.
- another object of the present invention is to provide a system for capturing carbon dioxide and converting carbon dioxide for a cement manufacturing facility, which captures and converts carbon dioxide from exhaust gas generated in the cement manufacturing process into carbon resources, and then stores and operates the converted carbon resources in the ground, so that carbon resources, which are carbon dioxide capture reactants, can be stored more stably and efficiently than conventional carbon dioxide storage devices, while reducing manufacturing and operating costs, as well as allowing the stored carbon resources to be used later when necessary.
- a carbon dioxide capture and carbon resource recovery system for a cement manufacturing facility for achieving the above object has a plurality of cyclones arranged in series in a vertical direction, and includes a preheater for receiving and preheating cement raw materials; A calciner for calcining the cement raw material preheated by the preheater; a calcination furnace for calcining the cement raw material calcined in the calcination furnace; an exhaust line connected to the cyclone of the preheater and discharging exhaust gas discharged from each of the calcining furnace and the calcining furnace to the outside; And a reactor disposed on the exhaust line to receive the exhaust gas and react with the basic alkali mixture to capture carbon dioxide in the exhaust gas, collect a reactant including the captured carbon dioxide, and separate the carbon dioxide reactant and the waste solution from the reactant. It includes.
- the reactor includes a mixer for supplying a basic alkali mixture; an absorption tower for collecting carbon dioxide in the exhaust gas by reacting the basic alkali mixed solution supplied from the mixer with the exhaust gas in which fine droplets are formed passing through a bubbler installed at the bottom; a separator for collecting the reactant containing carbon dioxide collected in the absorption tower and separating the reactant carbon dioxide and the waste solution from the reactant; and a carbon resource storage for storing the separated carbon dioxide reactant for recycling.
- the mixer is characterized in that the basic alkali solution supplied from the basic alkali solution storage tank and the water supplied from the water supply source are mixed to generate a basic alkali mixed solution.
- the average pH of the basic alkali mixture is characterized in that pH 12 to pH 13.5.
- the basic alkali mixture may include at least one oxide selected from the group consisting of SiO 2 , Al 2 O 3 , Fe 2 O 3 , TiO 2 , MgO, MnO, CaO, Na 2 O, K 2 O and P 2 O 3 ; at least one metal selected from the group consisting of Li, Cr, Co, Ni, Cu, Zn, Ga, Sr, Cd, and Pb; and at least one liquid composition selected from the group consisting of sodium tetraborate (Na 2 B 4 O 7 .10H 2 O), sodium hydroxide (NaOH), sodium silicate (Na 2 SiO 3 ), potassium hydroxide (KOH), and hydrogen peroxide (H 2 O 2 ).
- oxide selected from the group consisting of SiO 2 , Al 2 O 3 , Fe 2 O 3 , TiO 2 , MgO, MnO, CaO, Na 2 O, K 2 O and P 2 O 3
- at least one metal selected from the group consisting of Li, Cr, Co, Ni,
- the mixer is controlled through a valve to introduce the basic alkali mixture, and when the water level of the basic alkali mixture reaches 100%, the introduction is stopped, and at the same time, the basic alkali solution and water are mixed until the pH of the basic alkali mixture is 12 to 13.5.
- the bubbler is characterized by forming exhaust gas microbubbles using the exhaust gas.
- the absorption tower includes a tubular body, a motor, a rotating shaft rotated by the motor, and a rotating blade operatively connected by the rotating shaft, the rotating shaft and the rotating blade are located inside the main body, and the rotating blade has a plurality of nozzles through which the basic alkali mixed solution can be sprayed in the form of bubbles at regular intervals in a longitudinal direction, the basic alkali mixed solution supplied from the mixer flows into the rotating shaft, and the introduced basic alkali mixed solution flows through the plurality of nozzles. It is characterized in that it is sprayed into the inside of the tubular body.
- the absorption tower may further include a baffle formed with a plurality of slits or holes so that the exhaust gas flows in with a uniform velocity distribution.
- the plurality of cyclones are characterized in that an uppermost cyclone to which the cement fuel is supplied and a lowermost cyclone to which the calcination furnace and the exhaust gas discharged from each of the sintering furnaces are supplied are formed in two stages in series in the vertical direction.
- the carbon dioxide reactant is characterized in that it includes sodium carbonate (Na 2 CO 3 ) or sodium hydrogen carbonate (NaHCO 3 ).
- the separator a centrifugal separator for separating the carbon dioxide reactant and waste solution containing sodium carbonate (Na 2 CO 3 ) or sodium hydrogen carbonate (NaHCO 3 ) in the reactant; and a vibration isolation membrane formed to correspond to the inner circumference of the discharge pipe for discharging only sodium hydrogen carbonate out of the carbon dioxide reactant to the outside, and having fine pores formed on the surface thereof to allow permeation of the sodium hydrogen carbonate.
- the reactor may include a monitoring unit for monitoring the water level and pH of the basic alkali mixture in the absorption tower; and a controller controlling the supply amount of the basic alkali mixture by the monitoring unit.
- the carbon resource reservoir may include a geologic reservoir for accommodating the carbon dioxide reactant; an inlet unit for loading the carbon dioxide reactant into the underground reservoir; a discharge unit connected to the underground reservoir to unload the carbon dioxide reactant in the underground reservoir; a control unit controlling the intake unit and the discharge unit when loading/unloading the carbon dioxide reactant contained in the underground reservoir; and a filter for filtering impurities other than the carbon dioxide reactant when loading/unloading the carbon dioxide reactant.
- the carbon dioxide reactant is characterized in that it comprises bicarbonate in a liquid or gel state.
- the inlet unit may include: an inlet valve opening and closing a flow path for the carbon dioxide reactant loaded into the underground reservoir to control the flow rate of the loaded carbon dioxide reactant; and an inlet line connected to the underground reservoir to load the carbon dioxide reactant.
- the discharge unit may include a discharge line connected to the underground storage reservoir to unload the carbon dioxide reactant to the outside of the underground storage reservoir; a discharge pump provided on the discharge line and forcibly unloading the carbon dioxide reactant stored in the underground reservoir to the outside; a discharge valve opening and closing a flow path toward the discharge pump for the carbon dioxide reactant accommodated in the underground reservoir; and a vacuum pump connected to a discharge line between the underground reservoir and a discharge valve to discharge air in the underground reservoir to the outside to form a vacuum.
- the filter includes pores having a diameter of 10 to 20 ⁇ m formed to a size that allows the carbon dioxide reactant to pass through, and filters impurities other than the carbon dioxide reactant during loading/unloading of the carbon dioxide reactant.
- Embodiments of the disclosed technology may have effects including the following advantages. However, this does not mean that the embodiments of the disclosed technology must include all of them, so the scope of rights of the disclosed technology should not be understood as being limited thereby.
- carbon dioxide can be reduced by capturing carbon dioxide from exhaust gas discharged from a cement manufacturing process, and sodium carbonate or sodium bicarbonate, which is a useful resource, can be produced using the collected carbon dioxide.
- carbon dioxide is captured using a basic alkali mixed solution that solves the disadvantages of an alkanolamine aqueous solution, which is a carbon dioxide absorbent widely used in the prior art, and the captured carbon dioxide reactant is used in various industrial fields such as food additives, detergents, soap raw materials, high-tech medical industry, wastewater treatment, etc.
- carbon resources which are carbon dioxide capture reactants
- carbon resources can be stably and efficiently stored in a wider space than conventional carbon dioxide storage devices, while manufacturing and operating costs can be reduced, and the stored carbon resources can be used later when needed.
- FIG. 1 is a diagram schematically showing a carbon dioxide capture and carbon resource recovery system for a cement manufacturing facility according to an embodiment of the present invention.
- FIG. 2 is a view showing a reactor according to an embodiment of the present invention.
- FIG 3 is a diagram schematically showing the configuration of an absorption tower for improving carbon dioxide capture performance of a reactor according to an embodiment of the present invention.
- FIG. 4 is a cross-sectional view of a carbon resource storage according to an embodiment of the present invention.
- 5 is a view showing the distribution of underground temperature according to the depth from the general ground.
- the present invention relates to a carbon dioxide capture and carbon resource recovery system for a cement manufacturing facility for reducing carbon dioxide in exhaust gas generated in a cement manufacturing process.
- limestone (CaCO 3 ) which is included as the main raw material of cement raw material, is preheated by a preheater 3, and then calcined in a calciner 7 and a cyclone at the bottom of the preheater 3, and then fired in a high temperature atmosphere of about 1450° C. in the firing furnace 1 to obtain cement clinker.
- Carbon dioxide can be captured by introducing carbon dioxide generated in the process of manufacturing and manufacturing cement clinker into the reactor 10 through the exhaust line 8.
- the carbon dioxide capture and carbon resource recovery system for a cement manufacturing facility is a system capable of securing economic feasibility compared to the prior art by capturing carbon dioxide in exhaust gas generated in the cement manufacturing process, generating the captured carbon dioxide as a carbon dioxide reactant including sodium carbonate (Na 2 CO 3 ) or sodium bicarbonate (NaHCO 3 ), and storing the generated carbon dioxide reactant in an underground storage with little temperature change.
- the carbon dioxide capture and carbon resource recovery system for the cement manufacturing facility may include a preheater 3, a calciner 7, a firing furnace 1, an exhaust line 8, and a reactor 10, and optionally a main burner 5 and a clinker cooler 6 for cooling the cement clinker after firing may be installed on the right front side of the firing furnace to heat the inside of the firing furnace 1.
- the preheater 3 serves to heat the cement raw material in advance, and two sets are installed in parallel in the left rear part 2 of the rotary kiln, which is the firing furnace 1.
- Each preheater 3 is composed of a plurality of stages of cyclones arranged in series in the vertical direction. Specifically, the plurality of cyclones are formed in two stages in a vertical direction, with an uppermost cyclone supplied with the cement fuel and a lowermost cyclone supplied with exhaust gas discharged from each of the calcination furnace and the calcination furnace.
- the cement fuel After being supplied by the uppermost cyclone of the supply line 4, the cement fuel may be preheated by the high-temperature exhaust gas from the kiln 1 rising from the lower side as the cyclone lowers sequentially falls.
- the calciner 7 plays a role of calcining the cement fuel preheated by the preheater 3, and the cement fuel preheated by the preheater 3 is extracted from the bottom from the second stage cyclone and sent to the calciner 7. After being heated and calcined by the burner 7a, it is introduced from the lowermost cyclone through the transfer pipe 3a to the kiln tail part 2 of the firing furnace 1.
- a chemical reaction represented by limestone (CaCO 3 ) ⁇ CaO+CO 2 ⁇ occurs and carbon dioxide is generated.
- the calcination furnace 1 serves to calcine the cement raw material calcined in the calciner 7, and specifically, the cement raw material calcined in the calciner 7 is transferred from the lowermost cyclone disposed in the preheater 3 to the calcination furnace 1 through the transfer pipe 3a, and the calcination furnace 1 heats the cement raw material calcined in the calciner 7 through the combustion exhaust gas from the main burner 5 at about 1450 ° C. It can be calcined at high temperature to produce cement clinker, which is a cement semi-finished product.
- exhaust gas containing carbon dioxide may be generated as fossil fuel is burned in the main burner 5 in order to calcine cement fuel calcined at a high temperature in the kiln 1 and maintain a high-temperature atmosphere.
- an exhaust gas pipe 3b for supplying the exhaust gas discharged from the kiln 1 to the lowermost cyclone is installed in the kiln tail part 2 of the kiln 1, and the exhaust gas sent to the cyclone is sequentially sent to the upper cyclone, preheating the cement raw material, and finally exhausted from the top of the uppermost cyclone through the exhaust line 8 by the exhaust fan 9 to the reactor 10. .
- the reactor 10 is disposed on the exhaust line 8 to receive the exhaust gas containing the carbon dioxide generated from the calcination furnace 7 and the carbon dioxide generated from the calcination furnace 1 together through the exhaust line 8, and collect the carbon dioxide in the exhaust gas by reacting the exhaust gas containing the delivered carbon dioxide with the basic alkali mixture, collect the reactant containing the captured carbon dioxide, and separate the carbon dioxide reactant and the waste solution from the reactant.
- the reactor 10 will be described in detail with reference to FIG. 2 below.
- FIG. 2 is a view showing a reactor according to an embodiment of the present invention.
- the reactor 10 can reduce carbon dioxide by capturing carbon dioxide from exhaust gas discharged from a cement manufacturing facility, and has a structure capable of converting carbon dioxide into sodium carbonate or sodium bicarbonate using the captured carbon dioxide.
- the reactor 10 is a reactor for capturing carbon dioxide from exhaust gas discharged from the calcination furnace 7 and the calcination furnace 1 in a cement manufacturing facility using a basic alkali solution, and includes an absorption tower 100, a carbon dioxide collecting unit 11, an exhaust gas emission source 20, a mixer 30, a separator 40, a carbon resource storage tank 41, and a discharge unit 50.
- the absorption tower 100 may mean a facility, building, or facility for capturing carbon dioxide.
- the carbon dioxide collecting unit 11 located at the lower end of the absorption tower 110 is a part of the absorption tower 100, and may mean a part that collects carbon dioxide by bubbling exhaust gas.
- the absorption tower 100 includes a carbon dioxide collecting unit 11 at the lower end where carbon dioxide is collected, and reacts the basic alkali mixture with the exhaust gas (exhaust gas microbubbles) to capture only the carbon dioxide from the exhaust gas discharged from the cement manufacturing facility. After capturing carbon dioxide from the exhaust gas, exhaust gas from which carbon dioxide has been removed may remain in a gaseous state in the absorption tower 100 .
- a nozzle is installed at the top of the absorption tower 100, and a basic alkali mixture is sprayed from the mixer 30 through the nozzle into the absorption tower 100, and is collected in the carbon dioxide collecting unit 11 at the bottom.
- the exhaust gas supplied from the exhaust gas emission source 20 passes through the bubbler 13 in the carbon dioxide collecting unit 11 at the bottom of the absorption tower 10, and microbubbles are generated.
- the exhaust gas is supplied, and the basic alkali mixed liquid and the exhaust gas microbubbles react in the carbon dioxide collecting unit 11 to capture carbon dioxide.
- the microbubbles are formed while passing through the bubbler 13 having fine holes formed at the outlet of the exhaust gas discharge source 20 when the basic alkali mixed solution reacts with the exhaust gas.
- the bubbler 13 may form microbubbles in the exhaust gas by passing the exhaust gas supplied from the exhaust gas discharge source 20, and the microbubbles may have a larger reaction area between the exhaust gas and the alkali solution as the size of the bubbles decreases, thereby increasing the carbon dioxide capture capacity.
- the microbubbles may refer to bubbles present in an aqueous solution having a size of about 50 ⁇ m or less.
- the absorption tower 10 may include a level indicator 12 therein to detect the level of the solution in the absorption tower 10.
- the nozzle may include a plurality of nozzles and may be formed in one or more stages.
- the nozzle may be connected to the mixer 30 to supply a basic alkali mixed solution from the mixer 30.
- the absorption towers 100 may be configured in series, parallel, or a combination of series and parallel arrangements.
- the absorption towers 100 may be arranged in series when the flow rate of the exhaust gas is high.
- the absorption tower may be installed in series to collect the unreacted CO 2 .
- the absorption towers 100 may be arranged in parallel when the flow rate of the exhaust gas is high. If the flow rate of the exhaust gas exceeds the amount that can be captured by the absorption tower, the amount of carbon dioxide that can be captured can be increased by paralleling the absorption tower.
- the exhaust gas emission source 20 may utilize carbon dioxide, which is exhaust gas introduced from the calcination furnace 7 and the calcination furnace 1 through the exhaust line 8, and may be, for example, the rear end of a cement manufacturing facility.
- the mixer 30 mixes the basic alkali solution supplied from the basic alkali solution storage tank 31 and the water supplied from the water supply source 532 and supplies them to the nozzle of the absorption tower 10.
- the basic alkali mixed solution in which the basic alkali solution and water are mixed may be supplied using a separately connected by-pass line 36 when the amount supplied or required increases.
- the basic alkali solution and water may be mixed in a ratio of 1:1 to 1:5.
- the basic alkali solution and water may be mixed in a ratio of 1:1 to 1:4, 1:1 to 1:3, 1:1 to 1:2, 1:2 to 1:5, 1:2 to 1:3, or 1:3 to 1:5.
- the carbon dioxide capture rate of the basic alkali solution and water may increase as the mixing ratio of the basic alkali solution increases, but the mixing ratio of water may be adjusted in consideration of cost.
- the basic alkali mixture may include at least one oxide selected from the group consisting of SiO 2 , Al 2 O 3 , Fe 2 O 3 , TiO 2 , MgO, MnO, CaO, Na 2 O, K 2 O and P 2 O 3 ; At least one metal selected from the group consisting of Li, Cr, Co, Ni, Cu, Zn, Ga, Sr, Cd, and Pb; and at least one liquid composition selected from the group consisting of sodium tetraborate (Na 2 B 4 O 7 .10H 2 O), sodium hydroxide (NaOH), sodium silicate (Na 2 SiO 3 ), potassium hydroxide (KOH), and hydrogen peroxide (H 2 O 2 ).
- oxide selected from the group consisting of SiO 2 , Al 2 O 3 , Fe 2 O 3 , TiO 2 , MgO, MnO, CaO, Na 2 O, K 2 O and P 2 O 3 ;
- the water supply source 32 may include all water that can be easily obtained at the system installation site, and may be, for example, sea water.
- the average pH of the basic alkali mixture may be pH 12 or higher.
- the pH may be pH12 to pH13.5, pH12, pH12,1, pH12,2 or pH12.3.
- the pH of the basic alkali mixture can be measured with a pH meter in the absorption tower 10, and when the pH of the basic alkali mixture in the absorption tower 10 is less than 10.5, carbon dioxide can no longer be captured.
- the amount of the basic alkali solution and water may be adjusted from 0 to 100% at the valves 33 and 34 and supplied to the mixer 30.
- the mixer 30 When the water level of the basic alkali mixture in the absorption tower 10 is lowered to less than 90% (measured by a level indicator), the mixer 30 is controlled through the valve 35, and the basic alkali mixture is introduced. When the water level reaches 100%, the input can be stopped. At the same time, the basic alkali solution and water may be mixed until the pH of the basic alkali mixture is 12 to 13.5.
- the net flow may be set to 0 by adjusting the valve 35 (including a by-pass valve if necessary) so that the same amount of the basic alkali mixture as the value of the flow meter installed in the line from the absorption tower 10 to the separator 40 is supplied to the absorption tower 10.
- the basic alkali mixture reacts with the flue gas introduced from the calcination furnace 7 and the calcination furnace 1 of the cement manufacturing facility, and collects a reaction product including carbon dioxide captured, and the carbon dioxide reactant and the waste solution in the reactant move to the separator 40 through the valve 14 to separate the carbon dioxide reactant and the waste solution from the reactant.
- the separator 40 may include a centrifugal separator for separating a waste solution from a carbon dioxide reactant containing sodium carbonate (Na 2 CO 3 ) or sodium hydrogen carbonate (NaHCO 3 ) and a waste solution, and a vibration separator formed to correspond to the inner circumference of a discharge pipe for discharging only sodium bicarbonate out of the carbon dioxide reactant separated from the centrifuge to the outside and having fine pores formed on the surface thereof to allow the permeation of the sodium bicarbonate.
- a centrifugal separator for separating a waste solution from a carbon dioxide reactant containing sodium carbonate (Na 2 CO 3 ) or sodium hydrogen carbonate (NaHCO 3 ) and a waste solution
- a vibration separator formed to correspond to the inner circumference of a discharge pipe for discharging only sodium bicarbonate out of the carbon dioxide reactant separated from the centrifuge to the outside and having fine pores formed on the surface thereof to allow the permeation of the sodium bicarbonate.
- the micropores formed in the vibration isolation membrane may have a size of 10 to 20 ⁇ m, and may further include a vibration generator to induce vibration of the vibration isolation membrane.
- the vibration generating unit may be disposed to prevent the micropores from being blocked by sodium bicarbonate.
- the separated carbon dioxide reactant may be moved to the carbon resource storage 41 and recycled as a resource for other purposes.
- the carbon dioxide reactant may include sodium carbonate (Na 2 CO 3 ) or sodium hydrogen carbonate (NaHCO 3 ).
- the carbon dioxide reactant may be produced by reacting a basic alkali mixture with carbon dioxide.
- the waste solution excluding the carbon dioxide reactant from the reactants is moved to the wastewater treatment tank 42 and discarded.
- the waste solution may include illite minerals and water contained in the basic alkali mixed solution that has completed the catalytic role.
- the carbon resource storage 41 is a carbon dioxide reactant storage in consideration of the underground environment, and can stably and efficiently store carbon resources, which are carbon dioxide capture reactants, in a wider space than conventional carbon dioxide storage devices, while reducing manufacturing costs. In addition, the stored carbon resources can be implemented so that they can be utilized later when needed.
- the carbon resource storage 41 will be described in detail with reference to FIGS. 4 and 5 below.
- the remaining exhaust gas from which carbon dioxide is removed after capturing carbon dioxide in the carbon dioxide collecting unit 11 is discharged through the discharge unit 50 .
- the remaining exhaust gas discharged through the discharge unit 50 may include exhaust gas from which carbon dioxide is removed and a small amount of uncaptured CO 2 .
- the concentration of carbon dioxide cannot exceed the regulatory standard when the residual exhaust gas is discharged, the residual exhaust gas that does not exceed the standard can be discharged based on the concentration of carbon dioxide in the atmosphere where the residual exhaust gas will be discharged (a standard set by the manager after measuring the carbon dioxide concentration in the atmosphere in advance).
- the reactor 10 includes a monitoring unit 60 for monitoring the water level and pH of the basic alkali mixture in the absorption tower; And a control unit 61 for adjusting the supply amount of the basic alkali mixture by the monitoring unit 60; may further include.
- the values of the gas meter, pH meter, and flow meter measured in all processes of the reactor 10 are managed by the monitoring unit 60, and the control unit 61 adjusts based on the values indicated by the monitoring unit 60.
- the valves 14, 33, 34, and 35 may be adjusted in percentage with respect to the value input from the controller 61.
- the carbon dioxide capture and carbon resource recovery system for a cement manufacturing facility can reduce carbon dioxide by capturing carbon dioxide from exhaust gas generated in the cement manufacturing process, and converting the captured carbon dioxide into sodium carbonate or sodium bicarbonate, thereby converting the captured carbon dioxide into other useful materials.
- FIG 3 is a diagram schematically showing the configuration of an absorption tower 100 for improving the carbon dioxide capture performance of the reactor 10 according to an embodiment of the present invention.
- the structure of the absorption tower 100 includes a tubular reaction body, a motor M, a rotating shaft 37 rotated by the motor M, and a rotating blade 38 operatively connected by the rotating shaft 37, the rotating shaft 37 and the rotating blade 38 are located inside the reaction body, and the rotating blade 38 sprays a basic alkali mixture in the form of bubbles.
- a plurality of nozzles 39 which may be formed, are formed at regular intervals in the longitudinal direction, and the basic alkali mixed solution supplied from the mixer 30 flows into the rotating shaft 37, and the introduced basic alkali mixed solution is characterized in that it is injected into the tubular reaction body through the plurality of nozzles 39.
- the rotary blade 38 is operatively connected to the rotary shaft 37. That is, as the rotary shaft 37 of the motor M rotates, the rotary blades 38 for agitation also rotate to stir the basic alkali mixture inside the absorption tower 100.
- the plurality of nozzles 39 formed on the rotary blade 38 are configured to generate fine bubbles (bubbles having a diameter of several hundred micrometers to several micrometers), so that as the rotating shaft 37 rotates, the rotary blade 38 for agitation is also rotated so that the basic alkali mixed solution inside the absorption tower 100 can be sprayed more finely.
- an inlet pipe may be installed on the exhaust line 8 of FIG. 1 so that the exhaust gas introduced from the calcination furnace 7 and the firing furnace 1 of the cement manufacturing facility is discharged into the absorption tower 100 at the bottom of the absorption tower 100, and additionally, a baffle 608 formed with a plurality of slits or holes may be installed so that the exhaust gas flows into the absorption tower 100 with a uniform velocity distribution.
- the basic alkali mixed liquid that falls while rotating from the top to the bottom in the absorption tower 100 through a plurality of nozzles 39 formed at regular intervals on the rotary blades 38 operatively connected by the rotating shaft 37 is formed into fine droplets, and the basic alkali mixed liquid formed of the fine droplets and the exhaust gas formed of fine particles pass through the baffle 608 having a plurality of slits or holes in the reactor.
- the carbon dioxide capture performance of (10) can be improved.
- FIG. 4 is a cross-sectional view of a carbon resource storage according to an embodiment of the present invention
- FIG. 5 is a diagram showing a ground temperature distribution according to a depth from a general ground level.
- the carbon resource storage 41 is a carbon dioxide reactant storage in consideration of the underground environment, and can stably and efficiently store carbon resources, which are carbon dioxide capture reactants, in a wider space than conventional carbon dioxide storage devices, reduce manufacturing and operating costs, and can be implemented so that the stored carbon resources can be used later when necessary.
- the carbon resource storage 41 may include an underground reservoir D, an inlet unit, a discharge unit connected to the underground reservoir to unload the carbon dioxide reactant in the underground reservoir, a control unit, and a filter 50 for filtering impurities other than the carbon dioxide reactant during loading/unloading of the carbon dioxide reactant.
- the underground reservoir (D) is a place that can be excavated in the natural terrain as a place for receiving the carbon dioxide reactant separated from the reactor 10, and as shown in FIG. 5, for example, 12 to 16 degrees (° C.). For example, it is formed at a deeper depth from the ground than Am, but may be formed at a lower depth from the ground than Bm. This is to prevent a change in state of the carbon dioxide reactant at a temperature exceeding 50 degrees Celsius (° C.) and to store the carbon dioxide reactant in the form of bicarbonate in a liquid or gel state for a long time in a wide area.
- the inlet unit serves to load the carbon dioxide reactant into the underground reservoir, and includes an inlet valve 44 that opens and closes a flow path for the carbon dioxide reactant loaded into the underground reservoir to control the flow rate of the loaded carbon dioxide reactant; and an inlet line 45 connected to the underground reservoir to load the carbon dioxide reactant.
- an inlet valve 44 that opens and closes a flow path for the carbon dioxide reactant loaded into the underground reservoir to control the flow rate of the loaded carbon dioxide reactant
- an inlet line 45 connected to the underground reservoir to load the carbon dioxide reactant.
- the discharge unit serves to unload the carbon dioxide reactant in the underground reservoir, and includes a discharge line 49 connected to the underground reservoir to unload the carbon dioxide reactant to the outside of the underground reservoir; a discharge pump 48 provided on the discharge line 49 and forcibly unloading the carbon dioxide reactant stored in the underground reservoir to the outside; a discharge valve 47 for opening and closing a flow path toward the discharge pump 48 for the carbon dioxide reactant accommodated in the underground reservoir; and a vacuum pump 46 connected to the discharge line 49 between the underground reservoir and the discharge valve 47 to discharge air in the underground reservoir to the outside to form a vacuum.
- the carbon dioxide reactant can be stably stored in the underground reservoir, and the previously stored reactant can be obtained and used later when necessary.
- the control unit 51 controls the intake unit and the discharge unit when the carbon dioxide reactant stored in the underground storage is loaded into the underground storage or when the carbon dioxide reactant is unloaded from the underground storage to the outside, so that the carbon dioxide reactant at an appropriate flow rate can be stored in the underground storage or the carbon dioxide reactant previously stored in the underground storage can be discharged to the outside.
- the filter 50 may be disposed in a path of the inlet line 45 or the outlet line 49, respectively, and may include pores having a diameter of 10 to 20 ⁇ m formed in a size that allows the carbon dioxide reactant to pass through. When loading/unloading the carbon dioxide reactant, impurities other than the carbon dioxide reactant may be filtered out.
- the filter 50 performs a function of filtering impurities other than the carbon dioxide reactant when the carbon dioxide reactant introduced from the reactor 10 is loaded into the underground storage or when the carbon dioxide reactant is unloaded from the underground storage, so that impurities other than the carbon dioxide reactant are stored in the underground storage without being mixed, or even when the carbon dioxide reactant previously stored in the underground storage is unloaded to the outside, only the carbon dioxide reactant without impurities can be obtained.
- the carbon dioxide reactant generated in the carbon dioxide capture and carbon resource recovery system for cement manufacturing facilities according to the present invention can be stably and efficiently stored in a wider space, while manufacturing and operating costs can be reduced compared to the conventional carbon dioxide storage device.
- the stored carbon resources can be used later when necessary.
- the present invention can provide a carbon dioxide capture and carbon resource recycling system for a cement manufacturing facility that can efficiently reduce carbon dioxide emitted from a cement manufacturing facility and at the same time convert it into other useful materials.
- a profit generation effect can be expected by producing high purity sodium bicarbonate (NaHCO 3 ) used in various industrial fields such as food additives, detergents, soap raw materials, high-tech medical industry, and wastewater treatment from carbon dioxide captured through the carbon dioxide capture facility.
- NaHCO 3 high purity sodium bicarbonate
- the carbon dioxide reactant generated in the carbon dioxide capture and carbon resource recovery system for cement manufacturing facilities according to the present invention can be stably and efficiently stored in a wider space, while manufacturing and operating costs can be reduced compared to the conventional carbon dioxide storage device.
- the stored carbon resources can be used later if necessary.
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Abstract
Description
Claims (20)
- 상하 방향으로 직렬 배치된 복수단의 사이클론을 구비하며, 시멘트 원료를 공급받아 예열하는 예열기;상기 예열기에 의해 예열된 시멘트 원료를 하소하는 하소로;상기 하소로에서 하소된 시멘트 원료를 소성하는 소성로;상기 예열기의 사이클론과 연결되어, 하소로 및 소성로 각각에서 배출된 배가스를 외부로 배출시키는 배기라인; 및상기 배기라인 상에 배치되어 상기 배가스를 전달받아 염기성 알칼리 혼합액과 반응시켜 배가스 중 이산화탄소를 포집하고, 포집된 이산화탄소를 포함하는 반응물을 수집하며, 상기 반응물에서 이산화탄소 반응물과 폐용액을 분리하는 반응기;를 포함하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 1 항에 있어서, 상기 반응기는,염기성 알칼리 혼합액을 공급하는 믹서;상기 믹서로부터 공급된 염기성 알칼리 혼합액과 하부에 설치된 버블러를 통과하여 미세 방울이 형성된 배가스를 반응시켜 상기 배가스 중 이산화탄소를 포집하는 흡수탑;상기 흡수탑에서 포집된 이산화탄소를 포함하는 반응물을 수집하고, 상기 반응물에서 이산화탄소 반응물과 폐용액을 분리하는 분리기; 및상기 분리된 이산화탄소 반응물을 자원화하기 위해 저장하는 탄소자원 저장소를 포함하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 2 항에 있어서,상기 믹서는 염기성 알칼리 용액 저장조에서 공급된 염기성 알칼리 용액과 급수원에서 공급된 물을 혼합시켜 염기성 알칼리 혼합액을 생성하는 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 3 항에 있어서,상기 염기성 알칼리 용액과 물은 1:1 내지 1:5의 비율로 혼합되는 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 2 항에 있어서,상기 염기성 알칼리 혼합액의 평균 pH는 pH12 내지 pH13.5인 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 1 항에 있어서,상기 염기성 알칼리 혼합액은,SiO2, Al2O3, Fe2O3, TiO2, MgO, MnO, CaO, Na2O, K2O 및 P2O3로 이루어진 군으로부터 선택된 1종 이상의 산화물;Li, Cr, Co, Ni, Cu, Zn, Ga, Sr, Cd 및 Pb로 이루어진 군으로부터 선택된 1종 이상의 금속; 및,사붕산나트륨(Na2B4O7·10H2O), 수산화나트륨(NaOH), 규산나트륨(Na2SiO3), 수산화칼륨(KOH) 및 과산화수소(H2O2)로 이루어진 군으로부터 선택된 1 종 이상의 액상 조성물;을 포함하는 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 2 항에 있어서,상기 흡수탑 내의 염기성 알칼리 혼합액의 수위가 90% 미만으로 낮아지면 상기 믹서에서 밸브를 통해 조절되어 염기성 알칼리 혼합액이 투입되고 상기 염기성 알칼리 혼합액의 수위가 100%가 될 경우 투입이 중단되고, 그와 동시에 염기성 알칼리 혼합액의 pH가 12 내지 13.5가 될 때까지 염기성 알칼리 용액과 물을 혼합하는 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 2 항에 있어서,상기 버블러는 상기 배가스를 이용하여 배가스 마이크로버블을 형성하는 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 2 항에 있어서,상기 흡수탑은, 통 형상의 본체, 모터, 상기 모터에 의해 회전되는 회전축, 및 상기 회전축에 의해 동작적으로 연결된 회전날개를 포함하며,상기 회전축과 상기 회전날개는 상기 본체의 내부에 위치되고,상기 회전날개는 상기 염기성 알칼리 혼합액이 기포 형태로 분사될 수 있는 다수의 노즐이 길이 방향으로 일정 간격을 두고 형성되며,상기 회전축으로 상기 믹서로부터 공급된 염기성 알칼리 혼합액이 유입되고, 유입된 염기성 알칼리 혼합액은 상기 다수의 노즐을 통해서 상기 통형상의 본체 내부로 분사되는 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 9 항에 있어서,상기 흡수탑은,상기 배가스가 균일한 속도분포로 유입되도록 슬릿(Slit) 또는 구멍(Hole)이 다수 형성된 배플;을 더 포함하는 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 1 항에 있어서,상기 복수의 사이클론은 상기 시멘트 연료가 공급되는 최상단의 사이클론과, 상기 하소로 및 소성로 각각에서 배출된 배가스가 공급되는 최하단의 사이클론이 상하방향으로 직렬로 2단으로 형성된 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 1 항에 있어서,상기 이산화탄소 반응물은 탄산나트륨(Na2CO3) 또는 탄산수소나트륨(NaHCO3)을 포함하는 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 2 항에 있어서,상기 분리기는,상기 반응물에서 탄산나트륨(Na2CO3) 또는 탄산수소나트륨(NaHCO3)을 포함하는 이산화탄소 반응물과, 폐용액을 분리하는 원심분리기; 및상기 이산화탄소 반응물 중에서 탄산수소나트륨만을 외부로 배출시키기 위한 배출관의 내측 둘레에 대응되게 형성되고, 표면에 상기 탄산수소나트륨의 투과를 허용하는 크기로 미세 구멍이 형성된 진동분리막;을 포함하는 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 2 항에 있어서,상기 반응기는,상기 흡수탑 내의 염기성 알칼리 혼합액의 수위 및 pH를 모니터링하는 모니터링부; 및상기 모니터링부에 의해 염기성 알칼리 혼합액의 공급량을 조절하는 제어부;를 더 포함하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 2 항에 있어서,상기 탄소자원 저장소는,상기 이산화탄소 반응물을 수용하는 지중 저장지;상기 이산화탄소 반응물을 상기 지중 저장지로 로딩(loading)하는 인입 유닛;상기 지중 저장지와 연결되어 상기 지중 저장지 내의 상기 이산화탄소 반응물을 언로딩(unloading)하는 배출 유닛;상기 지중 저장지에 수용된 상기 이산화탄소 반응물을 로딩/언로딩시에 상기 인입 유닛 및 상기 배출 유닛을 제어하는 제어 유닛; 및상기 이산화탄소 반응물을 로딩/언로딩시에 상기 이산화탄소 반응물 이외의 불순물을 여과하는 필터;를 포함하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 15 항에 있어서,상기 이산화탄소 반응물은 액체 또는 겔 상태의 중탄산염을 포함하는 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 15 항에 있어서,상기 인입 유닛은,상기 지중 저장지의 내부로 로딩되는 이산화탄소 반응물에 대한 유로를 개폐하여 상기 로딩되는 이산화탄소 반응물의 유량을 조절하는 인입밸브; 및상기 이산화탄소 반응물을 로딩하도록 상기 지중 저장지와 연결되는 인입라인;을 포함하는 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 15 항에 있어서,상기 배출 유닛은,상기 지중 저장지와 연결되어 상기 이산화탄소 반응물을 상기 지중 저장지의 외부로 언로딩하는 배출라인;상기 배출라인 상에 구비되어 상기 지중 저장지에 수용된 이산화탄소 반응물을 외부로 강제 언로딩하는 배출펌프;상기 지중 저장지에 수용된 상기 이산화탄소 반응물에 대한 상기 배출펌프측으로의 유로를 개폐하는 배출밸브; 및상기 지중 저장지와 배출밸브 사이의 배출라인과 연결되어 상기 지중 저장지 내의 공기를 외부로 배출시켜 진공으로 형성하는 진공펌프;를 포함하는 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 15 항에 있어서,상기 필터는,상기 이산화탄소 반응물의 투과를 허용하는 크기로 형성된 직경 10~20㎛의 기공을 포함하여 상기 이산화탄소 반응물을 로딩/언로딩시에 상기 이산화탄소 반응물 이외의 불순물을 여과하는 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
- 제 15 항 또는 제 17 항 또는 제 18항 에 있어서,상기 필터는,상기 인입라인 또는 상기 배출라인의 경로 내에 배치되는 것을 특징으로 하는 시멘트 제조 설비용 이산화탄소 포집 및 탄소자원화 시스템.
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