WO2022264732A1 - 水素及びアンモニア製造システム - Google Patents
水素及びアンモニア製造システム Download PDFInfo
- Publication number
- WO2022264732A1 WO2022264732A1 PCT/JP2022/020433 JP2022020433W WO2022264732A1 WO 2022264732 A1 WO2022264732 A1 WO 2022264732A1 JP 2022020433 W JP2022020433 W JP 2022020433W WO 2022264732 A1 WO2022264732 A1 WO 2022264732A1
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- Prior art keywords
- ammonia
- water
- hydrogen
- concentrate
- exhaust gas
- Prior art date
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 563
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 280
- 239000001257 hydrogen Substances 0.000 title claims abstract description 57
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 57
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 52
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 114
- 239000002351 wastewater Substances 0.000 claims abstract description 97
- 239000007789 gas Substances 0.000 claims abstract description 72
- 238000011084 recovery Methods 0.000 claims abstract description 72
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 18
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 15
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 56
- 239000012141 concentrate Substances 0.000 claims description 46
- 239000007788 liquid Substances 0.000 claims description 34
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 32
- 239000001569 carbon dioxide Substances 0.000 claims description 28
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 28
- 238000002485 combustion reaction Methods 0.000 claims description 28
- 150000002500 ions Chemical class 0.000 claims description 26
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 21
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 21
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 21
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 19
- 239000004202 carbamide Substances 0.000 claims description 19
- 238000000926 separation method Methods 0.000 claims description 9
- 150000002431 hydrogen Chemical class 0.000 claims description 5
- 239000003513 alkali Substances 0.000 abstract description 9
- 238000007599 discharging Methods 0.000 abstract description 3
- 235000014666 liquid concentrate Nutrition 0.000 abstract 4
- 239000000126 substance Substances 0.000 description 27
- 238000009792 diffusion process Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 13
- 230000004048 modification Effects 0.000 description 13
- 238000012986 modification Methods 0.000 description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 10
- 239000000446 fuel Substances 0.000 description 9
- -1 ammonium ions Chemical class 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 239000003002 pH adjusting agent Substances 0.000 description 7
- 150000001768 cations Chemical class 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 238000009834 vaporization Methods 0.000 description 5
- 230000008016 vaporization Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000000701 coagulant Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000003456 ion exchange resin Substances 0.000 description 4
- 229920003303 ion-exchange polymer Polymers 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910052815 sulfur oxide Inorganic materials 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000010908 plant waste Substances 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000010457 zeolite Substances 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
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- 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
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- 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
- 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
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- 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
- B01D53/81—Solid phase processes
- B01D53/82—Solid phase processes with stationary reactants
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/10—Separation of ammonia from ammonia liquors, e.g. gas liquors
-
- 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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
Definitions
- the present invention relates to a system for producing hydrogen and ammonia using wastewater from a combustion plant equipped with a combustion chamber and a boiler.
- Patent Document 1 describes a method for obtaining ammonia-concentrated wastewater by passing boiler blow wastewater through a cation exchanger to capture ammonia in the cation exchanger and performing regeneration treatment on the cation exchanger.
- Chemicals such as hydrochloric acid, sulfuric acid and sodium hydroxide are added in the regeneration treatment of the cation exchanger. It also describes that ammonia-concentrated waste water is introduced into an ammonia recovery apparatus, and ammonia is transferred to a gas phase by stripping and recovered as ammonia gas.
- Patent Document 2 discloses a method of removing hardness components before introducing the ammonia-containing waste water into a stripping device (ammonia stripping tower) when stripping ammonia-containing waste water (effluent of flue gas desulfurization equipment) containing hardness components.
- a stripping device ammonia stripping tower
- ammonia-containing waste water effluent of flue gas desulfurization equipment
- a flocculation aid is added, and hardness components precipitated as precipitates are removed.
- the precipitate-free supernatant effluent is pH-adjusted by the addition of acid and supplied to a stripping device, where ammonia gas is recovered by stripping.
- Patent Document 1 requires a large amount of chemicals for regenerating the cation exchanger, that is, removing the ammonia captured by the cation exchanger, and the cost for obtaining ammonia-concentrated wastewater is high.
- Patent Document 2 also requires a large amount of chemicals for adjusting the pH, and cannot solve the problem of chemical costs. Also, if the two are mixed before being treated, the amount of scale components in the exhaust gas treated water will increase and the ammonia concentration in the boiler blow water will decrease, so it will be necessary to add a large amount of chemical for pretreatment. Therefore, the existing technology could not efficiently recover the valuables contained in the waste water of the plant.
- the present invention has been devised in view of the above problems, and aims to provide a hydrogen and ammonia production system that can efficiently and inexpensively produce valuable substances from plant wastewater.
- the hydrogen and ammonia production system of the present invention is a boiler that generates steam with the heat of the combustion furnace or combustion chamber and discharges boiler blow water;
- a plant comprising an exhaust gas treatment device that treats exhaust gas generated from the combustion furnace or the combustion chamber and discharges exhaust gas treatment wastewater, a first ammonia recovery device for stripping the exhaust gas treated wastewater to recover ammonia to produce a first ammonia concentrate; a second ammonia recovery device for stripping the first concentrated ammonia solution together with the boiler blow water to recover ammonia to produce a second concentrated ammonia solution; an ion removal device that passes the boiler blow water discharged from the second ammonia recovery device to obtain permeated water and separates it into an ion concentrate containing a residual alkaline component; a water electrolysis device that electrolyzes the permeated water to produce hydrogen; An organic or inorganic wastewater treatment device for the plant into which the ion concentrate is introduced as an alkalinity source.
- the exhaust gas treatment wastewater which is ammonia-containing wastewater
- the first ammonia concentrate is recovered together with the boiler blow water, which is ammonia-containing wastewater.
- the second concentrated ammonia solution can be recovered from the boiler blow water by stripping.
- Hydrogen can be produced by water electrolysis of permeated water obtained by using an ion removal device from the remaining boiler blow water from which the second concentrated ammonia solution has been recovered. Therefore, the hydrogen and ammonia production system of the present invention can efficiently and inexpensively produce valuable substances from ammonia-containing waste water of a plant.
- FIG. 1 is a block diagram showing an embodiment according to the present invention.
- FIG. It is a block diagram which shows the 1st modification which concerns on this invention. It is a block diagram which shows the 2nd modification which concerns on this invention. It is a block diagram which shows the 2nd modification which concerns on this invention.
- FIG. Where it is not necessary for the present invention to distinguish between ionic and molecular forms, the notation “ammonia” includes both ammonia molecules and ammonium ions. Therefore, “ammonia-containing waste water” also includes waste water containing ammonia in the form of ammonium ions.
- numerals only represent physical elements such as devices, parts, and parts related to the system in the embodiments and modifications of the present invention. Also, a symbol combining an alphabetic character F and a number represents a fluid such as liquid or gas generated in this system, and a symbol combining an alphabetic character P and a number represents a position.
- FIG. 1 is a block diagram showing a hydrogen and ammonia production system 1 according to an embodiment.
- the hydrogen and ammonia production system 1 includes a boiler 16 that generates steam from the heat of a combustion chamber (or a combustion furnace) 11, and an exhaust gas treatment device 19 that treats exhaust gas from the combustion chamber 11 and discharges exhaust gas treated wastewater F1.
- a first ammonia recovery device 21 that recovers ammonia contained by diffusion treatment of exhaust gas treatment wastewater F1 of the plant 10 to produce a first concentrated ammonia water F4, and a boiler blow water F3 of the plant 10.
- a second ammonia recovery device 24 that performs a diffusion treatment together with the first concentrated ammonia liquid 21 to produce a second concentrated ammonia water F8, and an ion removing device 27 that removes remaining alkaline components from the waste water F9 of the second ammonia recovery device 24.
- a water electrolysis device 28 that produces hydrogen F12 by water electrolysis of permeated water F11 from which alkali components have been removed, and ions that are alkali components removed by the ion removal device 27
- a comprehensive wastewater treatment apparatus 40 having organic and inorganic wastewater treatment apparatuses that uses the concentrated liquid F10 as an alkali source and treats plant wastewater F16 discharged from the plant 10 until it can be discharged.
- any plant having a combustion chamber and a boiler that generates steam from the heat of the combustion chamber, that is, a combustion plant can be applied. Can be applied to plants.
- the hydrogen and ammonia production system 1 may be constructed by continuing the transportation route such as pipelines and automobiles as appropriate.
- the valuables generation facility 20 and the comprehensive wastewater treatment device 40 may be arranged and configured on the same site as the plant 10 as ancillary equipment of the plant 10, or may be arranged on separate sites from each other.
- the hydrogen and ammonia production system 1 may be configured by continuing the transportation route such as a car or a car.
- the combustion chamber 11 (or combustion furnace) is the equipment that burns the fuel.
- the fuel is generally waste (municipal waste or industrial waste), and if it is a thermal power plant or a chemical plant, the fuel is generally coal, petroleum, Green fuel such as natural gas, woody biomass, and biogas produced by fermentation or the like.
- ammonia or hydrogen for example, ammonia or hydrogen produced by the ammonia production system 1 may be used.
- the combustion chamber 11 may be provided as a facility associated with the boiler 16 (for example, built into the boiler 16), which will be described later.
- Exhaust gas generated in the combustion chamber 11 flows sequentially through the flue as follows and is discharged from the chimney 15 into the atmosphere. That is, the exhaust gas is divided into a dust collector 13 for removing dust from the exhaust gas and a wet treatment device 14 for removing harmful components such as sulfur oxides (SOx) from the exhaust gas dust-removed by the dust collector 13 using a method such as a lime-gypsum method. and a chimney 15 for releasing the exhaust gas from which harmful components have been removed to the atmosphere.
- a dust collector 13 for removing dust from the exhaust gas
- SOx sulfur oxides
- a wet treatment device 14 for removing harmful components such as sulfur oxides (SOx) from the exhaust gas dust-removed by the dust collector 13 using a method such as a lime-gypsum method.
- a chimney 15 for releasing the exhaust gas from which harmful components have been removed to the atmosphere.
- Exhaust gas treated waste water F1 which is ammonia-containing waste water, is discharged from the wet treatment device 14 .
- the exhaust gas treated waste water F1 contains scale components such as Ca 2+ and Mg 2+ .
- the ammonia concentration of the exhaust gas treated water F1 is about 50 to 50,000 mg/L, preferably about 1,000 to 20,000 mg/L, more preferably about 2,000 to 10,000 mg/L.
- the discharged exhaust gas treated waste water F1 is introduced into the first ammonia recovery device 21 of the valuable resource generation facility 20, which will be described later.
- the exhaust gas treated waste water F1 may be stored in a waste water storage tank (not shown) and then introduced into the first ammonia recovery device 21 .
- the boiler 16 is a device that recovers heat from the combustion chamber 11 to generate steam F2.
- the boiler 16 includes a pure water production device 50 that produces pure water from tap water, industrial water, etc., an additive supply device 51 that adds additives such as pH adjusters to the produced pure water, A steam drum 52 that stores pure water (boiler water), a heat recovery device 53 such as a heat transfer tube or a superheating tube that turns the boiler water stored in the steam drum 52 into steam F2 with the heat of exhaust gas, and
- a steam turbine 54 that rotates an impeller with the steam stored in the steam drum 52, a generator 55 that generates electricity with the rotational force of the impeller of the steam turbine 54, and steam (waste water) after rotating the impeller of the steam turbine 54 a condenser 56 for returning steam) to water;
- Types of chemicals added here include, for example, boilers, corrosion inhibitors (oxidizers), scale inhibitors, etc., and include at least ammonia for corrosion prevention.
- the boiler 16 has a mechanism for discharging (blowing) part of the boiler water to the outside through a blow pipe in order to prevent various components contained in the boiler water from being concentrated.
- the boiler water discharged to the outside of the boiler 16 is called boiler blow water F3.
- the boiler blow water F3 is waste water containing ammonia supplied as an additive (ammonia-containing waste water), and is introduced into the second ammonia recovery device 22 of the valuables production facility 20, which will be described later.
- the water stored in the steam drum 21 has a pH value of about 9 to 10 (for example, a pH value of about 10.3). degree.
- the boiler blow water F3 may be stored in a waste water storage tank (not shown) and then introduced into the second ammonia recovery device 22 .
- the electric power generated by the generator 55 is used as electric power in the hydrogen and ammonia production system 1, and surplus electric power can be sold to electric power companies.
- the steam F2 can also be used for heat utilization equipment inside and outside the hydrogen and ammonia production system 1 .
- the valuables production facility 20 uses wastewater (ammonia-containing wastewater) discharged from the plant 10 to produce valuables. Specific examples of valuables produced at the valuables production facility 20 include hydrogen and ammonia, and urea and methane are also produced.
- the first ammonia recovery device 21 is a device that recovers ammonia contained in the exhaust gas treated waste water F1 by stripping to produce the first ammonia concentrate F4.
- the first pH adjuster supply device 23 is a device that supplies an alkaline chemical (for example, sodium hydroxide or the like) for adjusting the pH inside the first ammonia recovery device 21 .
- a stripping tower stripping tower partitioned into multiple stages with packing materials, trays, and separation cylinders is arranged as one long stripping tower in the vertical direction, or continuously in series. It is provided as a plurality of connected radiating towers.
- one stripping tower is used as an example, and the stripping tower is partitioned into three stages in the vertical direction by two trays as an example.
- One diffusion tower may be partitioned into four or more stages with three or more trays.
- high-temperature (approximately 70° C. to approximately 90° C.) exhaust gas treated waste water F1 is injected from the top of the diffusion tower.
- the exhaust gas treated waste water F1 gradually descends downward inside the diffusion tower while diffusing in the form of mist.
- high-temperature steam is supplied from the lower part of the diffusion tower so as to face the descending exhaust gas treated waste water F1. This vapor moves upward while diffusing in the form of mist inside the diffusion tower. Due to such gas-liquid contact between the exhaust gas treated waste water F1 and the steam, ammonia in the exhaust gas treated waste water F1 is transferred to the gas phase and recovered.
- the pH of the exhaust gas treated waste water in the first ammonia recovery device is more than 8 and less than 9.5. Below pH 8, diffusion of ammonia is difficult.
- the dissolved amount of Ca 2+ and Mg 2+ which are scale components in the exhaust gas treated waste water F1 depends on the pH, and if the pH exceeds 9.5, the scale components are likely to precipitate. Since the flue gas treated waste water F1 contains a large amount of scale components, the first ammonia recovery device 21 does not dare to raise the pH, and performs stripping within a pH range in which scale is less likely to deposit.
- the exhaust gas treatment wastewater F1 has a relatively high ammonia concentration, and as described later, it is necessary to excessively raise the pH in stripping for recovering the necessary amount of ammonia as an ammonia source to be mixed with the boiler blow water F3. No.
- the exhaust gas treated waste water F1 is at a high temperature (approximately 70° C. to approximately 90° C.) and ammonia is easily liberated, it is not necessary to raise the pH to a range where scale is likely to be generated. Therefore, the amount of alkali chemicals supplied from the first pH adjuster supply device 23 can be reduced, and the cost of chemicals can be reduced.
- the ammonia and water vapor that have transitioned to the gas phase are discharged from the upper part of the diffusion tower and recovered as the first concentrated ammonia liquid F4, after which they are introduced into the second ammonia recovery device 22 together with the boiler blow water F3.
- the ammonia concentration of the first ammonia concentrate F4 is, for example, about several percent to 10%.
- the steam F2 generated by the boiler 16 may be used as the steam supplied from the lower part of the stripping tower, or other steam may be used. Also, among the steam F2, if the waste steam after being supplied to the steam turbine 54 is reused, the cost of using the steam can be reduced.
- the second ammonia recovery device 22 is a device that recovers the ammonia contained in the boiler blow water F3 by stripping to produce the second ammonia concentrate F8.
- the second pH adjuster supply device 24 is a device that supplies an alkaline chemical (for example, sodium hydroxide or the like) for adjusting the pH inside the second ammonia recovery device 22 .
- the second ammonia recovery device 22 is also provided with a stripping tower similar to the first ammonia recovery device 21 .
- the first ammonia concentrate F4 is injected from the upper part of the stripping tower together with the boiler blow water F3 of high temperature (approximately 70° C. to approximately 90° C.).
- a liquid mixture obtained by mixing the first concentrated ammonia liquid F4 and the boiler blow water F3 in advance is injected.
- the mixed liquid of the boiler blow water F3 and the first concentrated ammonia liquid F4 gradually descends downward inside the stripping tower while diffusing in the form of mist.
- high-temperature steam is supplied from the lower part of the stripping tower so as to face the descending liquid mixture. This vapor moves upward while diffusing in the form of mist inside the diffusion tower.
- ammonia in the mixed liquid Due to such gas-liquid contact between the mixed liquid and the steam, ammonia in the mixed liquid is transferred to the gas phase and recovered.
- the ammonia concentration in the boiler blow water F3 is increased by introducing the first ammonia concentrate F4 containing high concentration ammonia into the second ammonia recovery device 22 together with the boiler blow water F3 containing relatively low concentration ammonia. can be done.
- the pH of the mixed solution can be adjusted to, for example, 10 to 12 by supplying an alkaline agent from the second pH adjuster supply device 24 .
- both the boiler blow water F3 and the first concentrated ammonia solution have high pH values, and the amount of alkaline agent supplied from the second pH adjuster supply device 24 is small. Furthermore, since the boiler blow water F3 is at a high temperature (approximately 70° C. to approximately 90° C.) and the first ammonia concentrate F4 is also at a high temperature, the cost of heating each liquid can be reduced. Thus, in the second ammonia recovery device 22, stripping can increase the efficiency of recovering ammonia. Alternatively, the first ammonia concentrate F4 and the boiler blow water F3 may be individually injected into the second ammonia recovery device 22 and mixed inside the second ammonia recovery device 22 without being mixed in advance.
- the ammonia and water vapor that have transitioned to the gas phase are discharged from the upper part of the diffusion tower and recovered as the second concentrated ammonia liquid F8.
- the ammonia concentration of the second concentrated ammonia solution F8 is higher than that of the first concentrated ammonia solution F4, for example about 25% to about 50%.
- the second ammonia concentrate F8 can be supplied, for example, as a fuel or raw material to ammonia utilization equipment 41 such as chemical plants and ammonia gas turbines.
- the second ammonia concentrate F8 may be supplied from the ammonia supply device 12 into the exhaust gas and used as a denitration agent (reducing agent for reducing NOx to nitrogen), or may be used for manufacturing chemical products. .
- the steam F2 generated by the boiler 16 may be used as the steam supplied from the lower part of the stripping tower, or other steam may be used. Also, among the steam F2, if the waste steam after being supplied to the steam turbine 54 is reused, the cost of using the steam can be reduced.
- Waste water F5 from which ammonia has been removed stays in the lower part of the diffusion tower of the first ammonia recovery device 21 .
- This waste water F5 is introduced into the flocculation treatment tank 26 .
- the coagulation treatment tank 26 is a tank for removing scale components F7 (eg, Ca 2+ , Mg 2+ , etc.) contained in the waste water F5.
- the coagulant treatment tank 26 is provided with a coagulant supply device 25 that supplies a coagulant for coagulating the scale components F7 in the waste water F5.
- the flocculant supplied by the flocculant supply device 25 may be an inorganic flocculant (e.g., ferric chloride solution, etc.) or an organic flocculant (e.g., polymer flocculant, etc.). good too.
- the scale component F7 in the waste water F5 is precipitated as a solid inside the coagulation treatment tank 26, and can be easily removed. Condensed waste water F6 (supernatant) from which the scale component F7 has been removed from the waste water F5 is supplied to the integrated waste water treatment device 40 .
- the waste water F5 may be supplied directly to the general waste water treatment facility 40 without installing the coagulation treatment tank 26.
- the ion removal device 27 is a device for removing alkali components (unnecessary ions) such as ammonia and sodium hydroxide in the waste water F9 remaining after the stripping treatment.
- the ion removing device 27 is provided with, for example, an ion exchange tower filled with an RO membrane (reverse osmosis membrane) or an ion exchange resin (for example, a high temperature ion exchange resin).
- the RO membrane is a membrane that allows hydrogen ions (H + ) and hydroxide ions (OH ⁇ ) in water to pass through and blocks the passage of other ions (eg, Ca 2+ , Mg 2+ , NH 4 + etc.).
- the ion exchange resin is a gel-like synthetic resin bead that replaces unnecessary ions in water with hydrogen ions or hydroxide ions.
- a heat-resistant cation exchange resin is used.
- the ion concentrate F10 containing ammonia components and other residual alkali components is supplied to the integrated wastewater treatment apparatus 40 and reused as an alkali source (ammonia source) in organic or inorganic wastewater treatment.
- the residual alkaline component contained in the ion concentrate F10 can be used as an ammonia source for wastewater treatment.
- the waste water F9 from the second ammonia recovery device 22 can be effectively reused as a resource.
- the waste water F9 is the waste water after the ammonia is recovered by the second ammonia recovery device, and the amount of chemicals for recovering the ammonia is small.
- the water electrolysis device 28 is a device that electrolyzes the permeated water F11 generated by the ion removing device 27 to produce hydrogen F12.
- a water electrolysis apparatus is supplied with water containing no or very few impurities, pure water, or water substantially equivalent to pure water for electrolysis. Therefore, the permeated water F11 is pure water or water substantially equivalent to pure water.
- the hydrogen F12 generated here is supplied as a fuel or raw material to a hydrogen utilization facility 42 such as a chemical plant, a fuel cell, or a hydrogen gas turbine, for example. Oxygen that may be generated during electrolysis of the permeated water F11 may be released to the atmosphere, supplied to the inside of the combustion chamber 11 as a combustion accelerator, or stored in an oxygen storage tank (not shown).
- a water electrolyzer is equipped with a heating device for heating room-temperature pure water, etc., in order to perform electrolysis efficiently. growing.
- the water electrolysis device 28 according to the embodiment can reduce the energy required for the heating device. This is because the boiler blow water F3, which is the raw material of the water electrolysis device 28, is at a high temperature, and the water temperature of the permeated water F9 separated by the ion removal device 27 is also high, so it is easy to adjust the temperature to a temperature higher than normal temperature.
- the comprehensive wastewater treatment equipment 40 is a wastewater treatment facility having various equipment for treating plant wastewater F16 including various wastewater discharged from the plant, for example, an organic treatment equipment and an inorganic treatment equipment.
- the organic system treatment apparatus is a wastewater treatment apparatus in which biological treatment (wastewater treatment by the action of microorganisms) is performed and which is provided with a nitrification tank, a denitrification tank, an aeration tank, and the like.
- An inorganic treatment apparatus is a wastewater treatment apparatus in which inorganic water treatment is performed.
- the organic treatment apparatus is provided with, for example, a nitrification tank, a denitrification tank, an aeration tank, etc., and ammonia in the wastewater is removed as nitrogen by the action of nitrification bacteria, denitrification bacteria, and the like.
- the inorganic treatment apparatus is provided with, for example, a chemical reaction tank, a sedimentation tank, a filtration tank, etc., and chemically removes impurities, metals, and the like in waste water.
- the wastewater treated by the comprehensive wastewater treatment apparatus 40 may be reused in the plant 10, the valuables generating facility 20 and the comprehensive wastewater level treatment apparatus 40, or may be discharged to the outside.
- the ammonia concentration suitable for stripping treatment is about 2000 mg/L.
- boiler blow water F3 has a relatively low ammonia concentration and is often unsuitable for stripping.
- the boiler blow water F3 has a water temperature of about 80°C, a discharge amount of about 150 m 3 /day, and an ammonia concentration of about 600 mg/L
- the exhaust gas treated waste water F1 has a water temperature of about 80°C and a discharge amount of about 80 m 3 /day.
- that the ammonia concentration is 3000 mg/L.
- the amount of boiler blow water F3 discharged is large and the concentration of ammonia contained therein is low. Therefore, it is difficult to efficiently recover ammonia if only the boiler blow water F3 is used for the stripping treatment.
- the exhaust gas treated waste water F1 is stripped by the first ammonia recovery device 21 to recover ammonia.
- the free ammonia becomes about 90% at a high temperature of about 80 ° C., and when all the free ammonia is recovered, the ammonia concentration is about 54000 mg / L.
- About 4 m 3 of first ammonia concentrate F4 can be recovered.
- the recovered first ammonia concentrate F4 is introduced into the second ammonia recovery device 22 together with the boiler blow water F3, and stripped again.
- the ammonia concentration of the mixed liquid of the boiler blow water F3 and the first ammonia concentrate F4 is about 2000 mg/L, and the ammonia concentration suitable for the stripping process is obtained. Therefore, the stripping efficiency of ammonia in the second ammonia recovery device 22 is improved. Further, if the pH of the mixed solution is adjusted and the stripping treatment is performed by the second ammonia recovery device 22, for example, a 25% concentration ammonia solution distributed in the market can be easily obtained as the second concentrated ammonia solution F8.
- the concentration of ammonia remaining in the waste water F9 discharged from the second ammonia recovery device 22 is approximately 200 mg/L. If this waste water F9 is supplied to the ion remover 27 and concentrated using a high-temperature ion exchange resin, an ion-concentrated liquid F10 in which residual alkaline components are concentrated and a permeated water F11 are obtained.
- the volume of the ion concentrate F10 obtained here is about 6 m 3 and the concentration of the residual alkaline component is about 5000 mg/L.
- the concentration of residual alkaline components is converted to ammonia nitrogen, it can be used as an alkaline source (ammonia source) in the treatment of organic wastewater up to about 200 m 3 per day, and is suitable for retaining bacteria in organic biological treatment. is.
- the first concentrated ammonia solution F4 is produced from the exhaust gas treatment wastewater F1 by the first ammonia recovery device 21, and this first concentrated ammonia solution F4 is produced together with the boiler blow water F3 by the second ammonia recovery device. 22 to produce the second ammonia concentrate F8, the efficiency is higher than that of stripping the exhaust gas treatment wastewater F1 and the boiler blow water F3 individually or by mixing the exhaust gas treatment wastewater F1 and the boiler blow water F3. Ammonia can be recovered well.
- a large amount of chemicals are used to capture ammonia contained in the boiler blow water F3 by pretreatment, or a large amount of chemicals is used to remove exhaust gas treated wastewater F1.
- Ammonia can be easily recovered without the need to adjust the pH of the solution to remove scale components and adjust the pH again. Therefore, according to the hydrogen and ammonia production system 1 described above, the wastewater from the plant 10 can be reused for the production of valuables (eg, hydrogen and ammonia) and chemical products, and valuables can be efficiently and inexpensively produced from the wastewater from the plant 10. can.
- valuables eg, hydrogen and ammonia
- FIG. 2 is a block diagram showing the configuration of a hydrogen and ammonia production system 1' according to the first modification.
- the same reference numerals are assigned to the same configurations as those described in the embodiments, and descriptions of the configurations and effects are omitted as appropriate.
- the hydrogen and ammonia production system 1' includes a second flow path that supplies part of the first ammonia concentrate F4 to the first ammonia recovery device 22 at a position different from the boiler blow water F3, and the boiler blow water F3 and the first flow path has a valuable resource generation facility 20' for flowing the first concentrated ammonia F4 to the second flow path when the ratio of the amount of ammonia in the first concentrated ammonia F4 is a predetermined value or more.
- a first flow path 60 for mixing the first concentrated ammonia solution F4 with the boiler blow water F3;
- a second flow path 61 supplied to the second flow path 61, a control valve 62 that adjusts the flow rate of the first concentrated ammonia F4 that flows through the second flow path 61, a control device 63 that controls the control valve 62, and the ammonia concentration of the boiler blow water F3
- Ammonia concentration meter 64 for measuring, flow meter 65 for measuring flow rate of boiler blow water F3, ammonia concentration meter 66 for measuring ammonia concentration of first ammonia concentrate F4 in first flow path 60, first flow path a flow meter 67 for measuring the flow rate of the first ammonia concentrate F4 at 60;
- the control device 63 calculates the ratio of the ammonia amount of the first concentrated ammonia liquid F4 to the boiler blow water F3 from the ammonia concentration and flow rate values measured by the ammonia concentration meter and the flow meter of each liquid, and the ratio of the ammonia amount
- a predetermined amount of about 1/10 of the first flow path, for example, the first concentrated ammonia solution F4 is supplied.
- a pH meter may be installed to obtain the ammonia concentration from the measured pH value.
- the position in the vertical direction of the second ammonia recovery device 22 where the mixed liquid of the boiler blow water F3 mixed with the first concentrated ammonia liquid F4 is supplied is a third position P3, and the first concentrated ammonia flowing through the second flow path 61
- the fourth position P4 is preferably set at a position different from the third position P3, more preferably the fourth position P4.
- a fourth position P4 is set above the third position P3.
- the fourth position P4 is arranged in a section above the third position P3.
- the first ammonia concentrate F4 in the first flow path may be supplied to a position where it is mixed with the boiler blow water F3 in the second ammonia recovery device 22 without being mixed with the boiler blow water F3 in advance.
- the first concentrated ammonia liquid may be supplied from the vicinity of the position P3 and mixed with the boiler blow water F3.
- the mist-like liquid to be treated supplied from each place can be easily diffused evenly inside the stripping tower, and the ammonia vaporization efficiency can be improved.
- the fourth position P4 above the third position P3 the time and distance required for ammonia to vaporize from the first concentrated ammonia liquid F4 supplied to the second ammonia recovery device 22 are ensured. and the efficiency of ammonia vaporization can be further improved. Therefore, the concentration of ammonia in the second ammonia recovery device 22 can be promoted.
- FIG. 3 is a block diagram showing the configuration of the hydrogen and ammonia production system 1′′ according to the second modification.
- the same configurations as those described in the embodiment are denoted by the same reference numerals, and the configurations and effects are described. The description is omitted as appropriate.
- the hydrogen and ammonia production system 1′′ uses a portion of the first concentrated ammonia liquid F4 and a portion of the second concentrated ammonia liquid F8 as the first ammonia recovery device 21 and the second ammonia recovery device 22 Each of them has a valuable resource generation facility 20′′ to be circulated.
- part of the first concentrated ammonia F4 is re-introduced to the first ammonia recovery device 21 via the first circulation path 31.
- part of the second concentrated ammonia F8 Part is reintroduced into the second ammonia recovery device 22 via the second circulation path 32.
- a more concentrated second ammonia concentrate F8 can be obtained according to the change in the flow rate of the boiler blow water F3.
- the vertical position at which the exhaust gas treated waste water F1 is supplied to the first ammonia recovery device 21 is defined as a first position P1, and the vertical position at which the first concentrated ammonia solution F4 is reintroduced from the first circulation path 31. is the second position P2.
- the second position P2 may be set at the same position as the first position P1, but is preferably set at a position different from the first position P1. Also, more preferably, the second position P2 is set above the first position P1.
- the second position P2 is arranged in the uppermost section in the ammonia recovery device 21 whose inside is divided into three sections, and the first position P1 is arranged in a section lower than the second position P2. It should be noted that the same effect can be obtained even if they are installed at the same positions as long as the positions are different from each other in the vertical direction.
- the mist-like liquid to be treated supplied from each place can be easily and evenly diffused inside the stripping tower, and the ammonia vaporization efficiency can be improved.
- the second position P2 above the first position P1 the time and distance required for ammonia to vaporize from the first concentrated ammonia liquid F4 that has been reintroduced into the first ammonia recovery device 21 is ensured. and can further improve the vaporization efficiency of ammonia. Therefore, the concentration of ammonia in the first ammonia recovery device 21 can be promoted.
- the position in the vertical direction where the second concentrated ammonia solution F8 is reintroduced from the second circulation path 32 is defined as a fifth position P5.
- the fifth position P5 may be set at the same position as the third position P3 or the fourth position P4, but is preferably set at a position different from the third position P3 or the fourth position P4. More preferably, the fifth position P5 is set above the third position P3 and the fourth position P4.
- the mist-like liquid to be treated supplied from each place tends to diffuse evenly inside the stripping tower, and the ammonia vaporizes. can improve efficiency.
- the fifth position P5 higher than the third position P3 and the fourth position P4, the second ammonia recovery device 22 requires a Time and distance can be easily secured, and the ammonia vaporization efficiency can be further improved. Therefore, the concentration of ammonia in the second ammonia recovery device 22 can be promoted.
- the waste water from the plant 10 can be reused for the production of valuable substances (eg, hydrogen and ammonia) and chemical products, and the waste water from the plant 10 can be used to efficiently and inexpensively produce valuable substances. can.
- valuable substances eg, hydrogen and ammonia
- FIG. 4 is a block diagram showing the configuration of a hydrogen and ammonia production system 1''' according to the third modification.
- the hydrogen and ammonia production system 1''' according to the second modification is applied to a plant 10''' having a carbon dioxide separation device 18, and a urea production device 33 and It has a valuables generation facility 20''' with a methanation device 34.
- the carbon dioxide separation device 18 is a device for recovering carbon dioxide F13 contained in the exhaust gas.
- a method for recovering carbon dioxide F13 various known methods can be employed.
- carbon dioxide F13 may be recovered from exhaust gas using a polymer separation membrane (carbon dioxide separation membrane).
- a medium having high absorption performance and adsorption performance for carbon dioxide F13 may be brought into contact with the exhaust gas to recover.
- activated carbon or zeolite is allowed to adsorb carbon dioxide F13 in the exhaust gas, and the carbon dioxide F13 may be recovered by heating or depressurization.
- a liquid medium is used, the carbon dioxide F13 may be absorbed and recovered by an amine solution, an aqueous potassium carbonate solution, an ammonia solution, or the like.
- the recovered carbon dioxide F13 and the hydrogen F12 and ammonia concentrate F8 produced by the hydrogen and ammonia production system can be supplied to the urea manufacturing device 33, and the recovered carbon dioxide F13 and hydrogen F12 can be supplied to the methanation device .
- the urea production device 33 is a device that synthesizes the carbon dioxide F13 and the second ammonia concentrate F8 to produce urea F14 (CH 4 N 2 O).
- the urea production apparatus 33 is provided with a reactor (non-catalyst vessel) for maintaining a high temperature and high pressure state, in which urea F14 is produced.
- the urea F14 produced here is supplied to the urea utilization facility 43 .
- the urea utilization facility 43 includes, for example, a chemical plant, a plant factory using urea F14 as a fertilizer, and the like.
- the methanation device 34 is a device that synthesizes carbon dioxide F13 and hydrogen F12 to produce methane F15 (CH 4 ).
- methane F15 is synthesized by a methanation reaction or a Sabatier reaction via a co-electrolytic reaction.
- the methanation device 34 is provided with a reactor (catalyst container) containing a catalyst for methane synthesis, and methane F15 is generated therein.
- the methane F15 generated here is supplied to the methane gas utilization equipment 44 .
- the methane gas utilization facility 44 includes, for example, buildings and facilities (gas pipes) that use methane F15 as fuel (city gas), gas engines that burn methane F15 to generate power, and the like.
- the carbon dioxide separator 18 in the plant 10''' by providing the carbon dioxide separator 18 in the plant 10''', the carbon dioxide F13 in the exhaust gas can be removed, and the amount of carbon dioxide F13 discharged from the stack 15 can be greatly reduced.
- the urea production device 33 in the valuable resource generation facility 20''' the urea F14 can be easily produced using the carbon dioxide F13 and the second ammonia concentrate F8 produced in the valuable resource generation facility 20'''.
- methanation device 34 in the valuable resource generation facility 20′′ methane F15 can be easily generated using the carbon dioxide F13 and the hydrogen F12 produced at the valuable resource generation facility. can be done.
- the wastewater from the plant 10''' can be reused for the production of valuables (such as hydrogen, ammonia, urea, and methane) and chemical products.
- valuables such as hydrogen, ammonia, urea, and methane
- Valuables can be produced efficiently and inexpensively from
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Abstract
Description
特許文献1には、ボイラブロー排水をカチオン交換体に通液してアンモニアをカチオン交換体に捕捉させ、カチオン交換体に対して再生処理を行うことでアンモニア濃縮排水を取得する手法が記載されている。カチオン交換体の再生処理においては、塩酸、硫酸、水酸化ナトリウム等の薬品が添加される。また、アンモニア濃縮排水をアンモニア回収装置へ導入し、ストリッピングによりアンモニアを気相に移行させてアンモニアガスとして回収することも記載されている。
また両者を混合してから処理しようとすると排ガス処理水のスケール成分が増えてボイラブロー水のアンモニア濃度が薄くなるので、前処理に係る薬剤を多量に添加する必要が生じる。従って、既存の技術では、プラントの排水に含まれる有価物を効率的に回収することができなかった。
燃焼炉又は燃焼室の熱で蒸気を生成し、ボイラブロー水を排出するボイラと、
前記燃焼炉又は前記燃焼室から発生する排ガスを処理し、排ガス処理排水を排出する排ガス処理装置と、を備えるプラントにおいて、
前記排ガス処理排水をストリッピング処理してアンモニアを回収し第1アンモニア濃縮液を製造する第1アンモニア回収装置と、
前記第1アンモニア濃縮液を前記ボイラブロー水とともにストリッピング処理してアンモニアを回収し第2アンモニア濃縮液を製造する第2アンモニア回収装置と、
前記第2アンモニア回収装置から排出された前記ボイラブロー水を通液させて、透過水を得ると共に、残存アルカリ成分を含むイオン濃縮液とに分離するイオン除去装置と、
前記透過水を電解して水素を製造する水電解装置と、
前記イオン濃縮液をアルカリ源として投入する前記プラントの有機若しくは無機排水処理装置を備える。
図中において、数字のみの符号は、本発明の実施例及び変形例において本システムに関係する装置、部品、部位等の物理的な要素を表す。また、アルファベットのFと数字とを組み合わせた符号は、本システムで生じる液体や気体などの流体(Fluid)を表し、アルファベットのPと数字とを組み合わせた符号は位置(Position)を表す。なお、以下に示す実施例及び変形例は、あくまでも例示に過ぎず、明示しない種々の変形や技術の適用を排除する意図はない。以下の各構成は、それらの趣旨を逸脱しない範囲で種々変形して実施できる。また、以下の各構成は、本発明に必須の構成を除いて必要に応じて取捨選択でき、あるいは公知の構成と組み合わせ可能である。
[A.構成]
図1は、実施例に係る水素及びアンモニア製造システム1を示すブロック図である。水素及びアンモニア製造システム1は、燃焼室(又は燃焼炉)11の熱で蒸気を生成するボイラ16と、燃焼室11の排ガスを処理し、排ガス処理排水F1を排出する排ガス処理装置19と、を少なくとも備えるプラント10と、プラント10の排ガス処理排水F1を放散処理して含有されるアンモニアを回収し、第1アンモニア濃縮水F4を製造する第1アンモニア回収装置21と、プラント10のボイラブロー水F3を第1アンモニア濃縮液21と共に放散処理して第二アンモニア濃縮水F8を製造する第2アンモニア回収装置24と、第2アンモニア回収装置24の排水F9から残存するアルカリ成分を除去するイオン除去装置27と、アルカリ成分が除去された透過水F11を水電解して水素F12を製造する水電解装置28と、を少なくとも備えた有価物生成施設20と、イオン除去装置27で除去されたアルカリ成分であるイオン濃縮液F10をアルカリ源として使用し、プラント10から排出されるプラント排水F16を放流可能になるまで処理する有機及び無機排水処理装置を備えた総合排水処理装置40とを備える。
プラント10としては燃焼室と燃焼室の熱で蒸気を生成するボイラを備えたプラント、すなわち燃焼プラントであれば適用可能であり、例えば、廃棄物焼却プラント、火力発電プラント、化学プラント等の種々のプラントに適用することができる。ただし水素及びアンモニア製造システム1が適用されるプラントは、図1の全ての構成が同一の敷地に配置される必要はなく、図1の複数の構成が互いに別個の敷地に配置されていてもよい。この場合、適宜、パイプラインや自動車などの運送経路を継続して、水素及びアンモニア製造システム1を構成すればよい。有価物生成施設20及び総合排水処理装置40は、プラント10の付帯設備としてプラント10と同一の敷地内に配置して構成されていてもよく、また互いに別個の敷地に配置され、適宜、パイプラインや自動車などの運送経路を継続して、水素及びアンモニア製造システム1を構成してもよい。
プラント10について、燃焼室11(又は燃焼炉)は、燃料を燃焼させる設備である。プラント10が例えば廃棄物焼却プラントの場合、一般的に燃料は廃棄物(都市ごみや産業廃棄物)であり、また、火力発電プラントや化学プラントの場合、一般的に、燃料は石炭、石油、天然ガス、木質系バイオマス、発酵等で生成したバイオガス等のグリーンフュエルなどである。また、燃焼室11の燃料としてはアンモニアや水素、例えばアンモニア製造システム1で製造したアンモニアや水素を使用しても良い。なお、燃焼室11は、後述するボイラ16に付随した設備として設けられる(例えば、ボイラ16に内蔵される)場合もある。
ここで添加される薬品の種類としては、例えば、清缶剤、防食剤(脱酸素剤)、スケール防止剤等が挙げられ、少なくとも腐食防止のためのアンモニアを含む。
ボイラ16は、ボイラ水に含まれる各種成分の濃縮を防止すべく、ブロー配管を介してボイラ水の一部を外部へ排出(ブロー)する機構を有する。ボイラ16の外部へ排出されるボイラ水のことを、ボイラブロー水F3と呼ぶ。ボイラブロー水F3は、添加剤で供給されたアンモニアを含む排水(アンモニア含有排水)であり、後述する有価物生成施設20の第2アンモニア回収装置22に導入される。防蝕性を考慮して、蒸気ドラム21に貯留される水のpH値を約9~10程度(例えば、pH値10.3程度)とするため、ボイラブロー水F3は、pH値が約9~10程度である。ボイラブロー水F3は図示しない排水貯留槽に貯留されてから第2アンモニア回収装置22に導入されてもよい。
発電機55で発電された電力は、水素及びアンモニア製造システム1内の電力として利用され、余った電力は電力会社に売電することができる。蒸気F2はまた水素及びアンモニア製造システム1内外の熱利用設備に利用できる。
ここで、第1アンモニア回収装置における排ガス処理排水のpHは8より大きく9.5未満で行うことが好ましい。pH8未満では、アンモニアの放散が困難である。
また、排ガス処理排水F1中のスケール成分であるCa2+やMg2+の溶存量はpHに依存し、pH9.5を越えるとスケール成分が析出しやすくなる。排ガス処理排水F1にはスケール成分が多く含まれるため、第1アンモニア回収装置21ではあえてpHを上げず、スケールの析出しづらいpH範囲でストリッピングを実施する。
すなわち、排ガス処理排水F1はアンモニア濃度が比較的大きく、後述するようにボイラブロー水F3に混合するアンモニア源として必要な量のアンモニアを回収するためのストリッピングにおいては、過剰にpHを上昇させる必要がない。加えて、排ガス処理排水F1は高温(約70℃~約90℃)でアンモニアが遊離しやすいため、スケールが生成されやすい領域までpHを上昇させる必要がない。従って、第1pH調整剤供給装置23から供給されるアルカリ薬剤量を減らすことができ、薬品コストを削減できる。
また、ボイラブロー水F3及び第1アンモニア濃縮液F4は、含有するスケール成分が少ないため、スケールの析出を気にせずにpHを上げることができる。ここで混合液のpHは、第2pH調整剤供給装置24からアルカリ剤を供給して例えば10~12となるように調整することができる。このとき、ボイラブロー水F3及び第1アンモニア濃縮液は共にpH値が高く、第2pH調整剤供給装置24から供給するアルカリ剤の量は少なくて済む。
さらに、ボイラブロー水F3は高温(約70℃~約90℃)であり、第1アンモニア濃縮液F4も高温のため、各液を加温するコストも少なくて済む。
このように第2アンモニア回収装置22ではストリッピングによりアンモニアを回収する効率を上げることができる。
なお、第1アンモニア濃縮液F4とボイラブロー水F3を予め混合せずに第2アンモニア回収装置22内に個別に噴射して第2アンモニア回収装置22の内部で混合させるようにしてもよい。
凝集処理槽26は、排水F5に含まれるスケール成分F7(例えば、Ca2+、Mg2+等)を除去するための槽である。凝集処理槽26には、排水F5中のスケール成分F7を凝集させるための凝集剤を供給する凝集剤供給装置25が付設される。凝集剤供給装置25で供給される凝集剤には、無機凝集剤(例えば、塩化第2鉄液等)を使用してもよいし有機凝集剤(例えば、高分子凝集剤等)を使用してもよい。排水F5中のスケール成分F7は、凝集処理槽26の内部に固形物として析出するため、容易に除去することができる。また、排水F5からスケール成分F7が除去された凝集排水F6(上澄)は、総合排水処理装置40に供給される。なお排水F5は凝集処理槽26を設置せずに直接総合排水処理設備40に供給してもよい。
イオン除去装置27は、ストリッピング処理後に残存する排水F9中のアンモニアや水酸化ナトリウム等のアルカリ成分(不要イオン)を除去する装置である。イオン除去装置27には、例えば、RO膜(逆浸透膜)やイオン交換樹脂(例えば、高温イオン交換樹脂)が充填されたイオン交換塔が設けられる。RO膜は、水中の水素イオン(H+)や水酸化物イオン(OH-)を通過させ、その他のイオン(例えば、Ca2+、Mg2+、NH4 +等)の通過を阻止する膜である。また、イオン交換樹脂は、水中の不要イオンを水素イオンや水酸化物イオンに置換するゲル状の合成樹脂ビーズであり、例えば耐熱性のカチオン交換樹脂が使用される。これらの作用により、不要イオンが除去された透過水F11と不要イオンを含有するイオン濃縮液F10とに排水F9が分離される。ここで生成された透過水F11は、水電解装置28に供給される。また、アンモニア成分や他の残存アルカリ成分を含むイオン濃縮液F10は、総合排水処理装置40に供給され、有機又は無機排水処理におけるアルカリ源(アンモニア源)として再利用される。
これにより、イオン濃縮液F10に含まれる残存アルカリ成分を排水処理用のアンモニア源として利用できる。言い換えれば、第2アンモニア回収装置22の排水F9を資源として有効に再利用できる。また排水F9は第2アンモニア回収装置でアンモニアを回収された後の排水であり、アンモニアを回収するための薬品量が少なくて済む。
なお、一般的に、水電解装置は効率よく電気分解を行うため、常温の純水等を加温する加温装置を備えているが、常温の純水を加温するためのエネルギーは非常に大きくなる。しかし、実施例に係る水電解装置28は当該加温装置に必要なエネルギーを少なくできる。なぜなら水電解装置28の原料であるボイラブロー水F3は高温であり、イオン除去装置27で分離される透過水F9の水温も高いため、常温よりも高温に調整しやすいからである。
一般的に、ストリッピング処理に適するアンモニア濃度は約2000mg/L程度とされる。しかし、ボイラブロー水F3のアンモニア濃度は比較的低く、ストリッピング処理には不適であることが多い。例えば、ボイラブロー水F3の水温が約80℃、排出量が約150m3/日、アンモニア濃度が約600mg/Lであり、排ガス処理排水F1の水温が約80℃、排出量が約80m3/日、アンモニア濃度が3000mg/Lであると仮定する。この場合、ボイラブロー水F3は排出量が多く、含まれるアンモニアの濃度が低いため、ボイラブロー水F3のみを用いてストリッピング処理をしたのでは、効率よくアンモニアを回収することが難しい。
図2は、第1変形例に係る水素及びアンモニア製造システム1′の構成を示すブロック図である。実施例で説明した構成と同一の構成については、同一の符号を付して構成及び効果の説明を適宜省略する。水素及びアンモニア製造システム1′は、第1アンモニア濃縮液F4の一部をボイラブロー水F3と異なる位置で第1アンモニア回収装置22に供給する第2流路を備え、ボイラブロー水F3と第1流路の第1アンモニア濃縮液F4のアンモニア量の比が一定値以上のとき第1アンモニア濃縮液F4を第2流路に流す有価物生成施設20′を有する。
制御装置63は、各液のアンモニア濃度計と流量計で計測されるアンモニア濃度と流量の値からボイラブロー水F3に対する第1アンモニア濃縮液F4のアンモニア量の比を計算し、アンモニア量の比が所定値、例えば2以上となる場合に、ボイラブロー水F3には十分なアンモニア量が供給されるとみなし、調整弁62を開いて、第2流路61に、アンモニア量の比が所定値を下回らない程度の所定量、例えば第1流路の1/10程度の第1アンモニア濃縮液F4を供給する。アンモニア濃度計の代わりに、例えばpH計を設置して、計測されたpH値からアンモニア濃度を求めてもよい。
さらに、第2アンモニア回収装置22の鉛直方向において第1アンモニア濃縮液F4と混合したボイラブロー水F3の混合液が供給される位置を第3位置P3とし、第2流路61を流れる第1アンモニア濃縮液F4が第2アンモニア回収装置22に供給される鉛直方向の位置を第4位置P4とすると、第4位置P4は、第3位置P3と異なる位置に設定することが好ましく、より好ましくは、第4位置P4が第3位置P3よりも上方に設定される。
図2においては、内部が3つに区画された第2アンモニア回収装置22において、第4位置P4が第3位置P3よりも上の区画に配置される。
また、第1流路の第1アンモニア濃縮液F4は、予めボイラブロー水F3と混合させずに、第2アンモニア回収装置22内でボイラブロー水F3と混合する位置に供給されてもよく、例えば第3位置P3の近傍から第1アンモニア濃縮液を供給してボイラブロー水F3と混合してもよい。
図3は、第2変形例に係る水素及びアンモニア製造システム1″の構成を示すブロック図である。実施例で説明した構成と同一の構成については、同一の符号を付して構成及び効果の説明を適宜省略する。水素及びアンモニア製造システム1″は、第1アンモニア濃縮液F4の一部及び第2アンモニア濃縮液F8の一部を、第1アンモニア回収装置21及び第2アンモニア回収装置22のそれぞれに循環させる有価物生成施設20″を有する。
第5位置P5は、第3位置P3や第4位置P4と同一位置に設定してもよいが、好ましくは第3位置P3や第4位置P4とは異なる位置に設定される。また、より好ましくは、第5位置P5は第3位置P3や第4位置P4よりも上方に設定される。
従って、この水素及びアンモニア製造システム1″によれば、プラント10の排水を有価物(例えば水素、アンモニア)や化成品の製造に再利用でき、プラント10の排水から有価物を効率よく安価に生成できる。
図4は、第3変形例に係る水素及びアンモニア製造システム1″′の構成を示すブロック図である。実施例及び第1変形例で説明した構成と同一の構成については、同一の符号を付して構成及び効果の説明を適宜省略する。第2変形例に係る水素及びアンモニア製造システム1″′は、二酸化炭素分離装置18を有するプラント10″′に適用されるとともに、尿素製造装置33及びメタネーション装置34を備えた有価物生成施設20″′を有する。
図3においては、回収された二酸化炭素F13とアンモニア濃縮液F8を尿素製造装置33に、回収された二酸化炭素F13と水素F12をメタネーション装置34に供給することができる。
尿素製造装置33は、二酸化炭素F13及び第2アンモニア濃縮液F8を合成して尿素F14(CH4N2O)を生成する装置である。尿素製造装置33には、高温高圧状態を維持するための反応器(無触媒容器)が設けられ、その内部で尿素F14が生成される。ここで生成された尿素F14は、尿素利用設備43に供給される。尿素利用設備43には、例えば、化学プラントや尿素F14を肥料として使用する植物工場等が含まれる。
10、10″、10″′ プラント
11 燃焼室(燃焼炉)
12 アンモニア供給装置
13 集じん装置
14 湿式処理装置
15 煙突
16 ボイラ
18 二酸化炭素分離装置
19 排ガス処理装置
20、20′、20″、20″′ 有価物生成施設
21 第1アンモニア回収装置
22 第2アンモニア回収装置
23 第1pH調整剤供給装置
24 第2pH調整剤供給装置
25 凝集剤供給装置
26 凝集処理槽
27 イオン除去装置
28 水電解装置
31 第1循環路(循環路)
32 第2循環路
33 尿素製造装置
34 メタネーション装置
40 総合排水処理装置
41 アンモニア利用設備
42 水素利用設備
43 尿素利用設備
44 メタンガス利用設備
50 蒸気タービン
51 復水器
52 脱気器
53 発電機
54 純水製造装置
60 第1流路
61 第2流路
62 制御弁
63 制御装置
64 アンモニア濃度計
65 流量計
66 アンモニア濃度計
67 流量計
F1 排ガス処理排水
F2 蒸気
F3 ボイラブロー水
F4 第1アンモニア濃縮液
F5 排水
F6 凝集排水
F7 スケール成分
F8 第2アンモニア濃縮液
F9 排水
F10 イオン濃縮液
F11 透過水
F12 水素
F13 二酸化炭素
F14 尿素
F15 メタン
F16 プラント排水
P1 第1位置
P2 第2位置
P3 第3位置
P4 第4位置
P5 第5位置
Claims (5)
- 燃焼炉又は燃焼室の熱で蒸気を生成し、ボイラブロー水を排出するボイラと、
前記燃焼炉又は前記燃焼室から発生する排ガスを処理し、排ガス処理排水を排出する排ガス処理装置と、を備えるプラントにおいて、
前記排ガス処理排水をストリッピング処理してアンモニアを回収し第1アンモニア濃縮液を製造する第1アンモニア回収装置と、
前記第1アンモニア濃縮液を前記ボイラブロー水とともにストリッピング処理してアンモニアを回収し第2アンモニア濃縮液を製造する第2アンモニア回収装置と、
前記第2アンモニア回収装置から排出された前記ボイラブロー水を通液させて、透過水を得ると共に残存アルカリ成分を含むイオン濃縮液とに分離するイオン除去装置と、
前記透過水を電解して水素を製造する水電解装置と、
前記イオン濃縮液をアルカリ源として投入する前記プラントの有機若しくは無機排水処理設備を備える水素及びアンモニア製造システム。 - 前記第1アンモニア濃縮液が流れる第1流路と、前記第1流路におけるアンモニア濃縮液のアンモニア量と、前記ボイラブロー水のアンモニア量の比が所定値以上の場合に、前記第1流路から前記所定値を下回らない程度の第1アンモニア濃縮液を流通させる第2流路と、を備え、
前記ボイラブロー水は前記第2アンモニア回収装置の第3位置に供給され、
前記第2流路の前記第1アンモニア濃縮液は、前記第2アンモニア回収装置の鉛直方向において前記第3位置とは異なる第4位置に供給される請求項1に記載の水素及びアンモニア製造システム。 - 前記第1アンモニア濃縮液の一部が前記第1アンモニア回収装置に循環する第1循環路を備え、前記排ガス処理排水は、前記第1アンモニア回収装置の第1位置に供給され、
前記第1循環路を通る第1アンモニア濃縮液は、前記第1アンモニア回収装置の前記第1位置とは異なる第2位置に供給される請求項2に記載の水素及びアンモニア製造システム。 - 前記第2アンモニア濃縮液の一部が前記第2アンモニア回収装置に循環する第2循環路を備え、前記第2循環路を通る第2アンモニア濃縮液は前記第2アンモニア回収装置の鉛直方向において前記第3位置と異なる第5位置に供給される請求項3に記載の水素及びアンモニア製造システム。
- 前記排ガス処理装置より排出された排ガスから二酸化炭素を分離する二酸化炭素分離装置と、
前記二酸化炭素分離装置により分離された前記二酸化炭素と前記水素とからメタンガスを製造するメタネーション装置及び/または、
前記二酸化炭素分離装置により分離された前記二酸化炭素と前記第2アンモニア濃縮液とから尿素を製造する尿素製造装置を備える請求項1乃至請求項4のいずれか一項に記載の水素及びアンモニア製造システム。
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JP2004105903A (ja) * | 2002-09-20 | 2004-04-08 | Nippon Shokubai Co Ltd | ヒドラジン含有排水の処理法 |
JP2005246114A (ja) * | 2004-03-01 | 2005-09-15 | Babcock Hitachi Kk | アンモニア含有排水の処理装置および処理方法 |
JP2014008501A (ja) * | 2012-07-03 | 2014-01-20 | Mitsubishi Heavy Ind Ltd | 排水処理システム及び複合発電設備 |
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