CN109675426A - It is a kind of using ground phosphate rock and mud phosphorus to the system and method for flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer - Google Patents
It is a kind of using ground phosphate rock and mud phosphorus to the system and method for flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer Download PDFInfo
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- CN109675426A CN109675426A CN201811487659.9A CN201811487659A CN109675426A CN 109675426 A CN109675426 A CN 109675426A CN 201811487659 A CN201811487659 A CN 201811487659A CN 109675426 A CN109675426 A CN 109675426A
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- phosphate rock
- spray column
- digester
- ground phosphate
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 185
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 185
- 239000011574 phosphorus Substances 0.000 title claims abstract description 185
- 239000003546 flue gas Substances 0.000 title claims abstract description 115
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 239000002367 phosphate rock Substances 0.000 title claims abstract description 97
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 40
- 230000023556 desulfurization Effects 0.000 title claims abstract description 40
- 239000003337 fertilizer Substances 0.000 title claims abstract description 31
- 239000006227 byproduct Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 295
- 239000007921 spray Substances 0.000 claims abstract description 253
- 239000000706 filtrate Substances 0.000 claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000004176 ammonification Methods 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims description 156
- 229910019142 PO4 Inorganic materials 0.000 claims description 80
- 239000010452 phosphate Substances 0.000 claims description 78
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 78
- 239000000779 smoke Substances 0.000 claims description 36
- 238000003756 stirring Methods 0.000 claims description 24
- 239000007789 gas Substances 0.000 claims description 23
- 239000000243 solution Substances 0.000 claims description 23
- AUKYVRQNWTVGPJ-UHFFFAOYSA-N triazanium nitric acid phosphate Chemical compound [NH4+].[NH4+].[NH4+].O[N+]([O-])=O.[O-]P([O-])([O-])=O AUKYVRQNWTVGPJ-UHFFFAOYSA-N 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 16
- SVIWHEPBWMMFFB-UHFFFAOYSA-N azane nitric acid phosphane Chemical compound [O-][N+](O)=O.N.P SVIWHEPBWMMFFB-UHFFFAOYSA-N 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 13
- 238000006467 substitution reaction Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 7
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims description 7
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims description 7
- 239000001099 ammonium carbonate Substances 0.000 claims description 7
- 239000013078 crystal Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000002425 crystallisation Methods 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 6
- 235000019504 cigarettes Nutrition 0.000 claims description 3
- LQXZLHKVIRVBTC-UHFFFAOYSA-O [N+](=O)([O-])[O-].[NH4+].[P] Chemical compound [N+](=O)([O-])[O-].[NH4+].[P] LQXZLHKVIRVBTC-UHFFFAOYSA-O 0.000 claims description 2
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 239000012266 salt solution Substances 0.000 claims description 2
- 210000002966 serum Anatomy 0.000 claims 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract description 11
- 229910017604 nitric acid Inorganic materials 0.000 abstract description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 16
- 239000011575 calcium Substances 0.000 description 16
- 229910002651 NO3 Inorganic materials 0.000 description 13
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- 229910052681 coesite Inorganic materials 0.000 description 9
- 229910052906 cristobalite Inorganic materials 0.000 description 9
- 239000000377 silicon dioxide Substances 0.000 description 9
- 229910052682 stishovite Inorganic materials 0.000 description 9
- 229910052905 tridymite Inorganic materials 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 8
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 8
- 229910052791 calcium Inorganic materials 0.000 description 8
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 7
- FUFJGUQYACFECW-UHFFFAOYSA-L calcium hydrogenphosphate Chemical compound [Ca+2].OP([O-])([O-])=O FUFJGUQYACFECW-UHFFFAOYSA-L 0.000 description 6
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 229910052593 corundum Inorganic materials 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 description 5
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 229910052925 anhydrite Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910000020 calcium bicarbonate Inorganic materials 0.000 description 2
- 235000019700 dicalcium phosphate Nutrition 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 125000002743 phosphorus functional group Chemical group 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- JLDSOYXADOWAKB-UHFFFAOYSA-N aluminium nitrate Inorganic materials [Al+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O JLDSOYXADOWAKB-UHFFFAOYSA-N 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(III) nitrate Inorganic materials [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VXAPDXVBDZRZKP-UHFFFAOYSA-N nitric acid phosphoric acid Chemical compound O[N+]([O-])=O.OP(O)(O)=O VXAPDXVBDZRZKP-UHFFFAOYSA-N 0.000 description 1
- -1 nitric acid phosphorus ammonium nitrogen Chemical compound 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- RAFRTSDUWORDLA-UHFFFAOYSA-N phenyl 3-chloropropanoate Chemical compound ClCCC(=O)OC1=CC=CC=C1 RAFRTSDUWORDLA-UHFFFAOYSA-N 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- 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
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C1/00—Ammonium nitrate fertilisers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/61—Phosphates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The present invention relates to a kind of using ground phosphate rock and mud phosphorus to the system and method for flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer, belongs to resource utilization and environmental protection technical field.The system includes spray column I, digester I, circulating pump I, spray column II, digester II, circulating pump II, spray column III, digester III, circulating pump III, slurries storage tank, disk filter, filtrate receiver, ammonification slot, filter press, inspissator, steam exhaust cooler, condensed water storage tank, surge tank, ground phosphate rock storage tank, mud phosphorus storage tank.The present invention carries out desulphurization denitration processing to flue gas using using ground phosphate rock and mud phosphorus as desulfurization denitrification agent, removes the SO in flue gas2And NO, make the SO in flue gas2With NO to discharge standard up to standard, using NH4HCO3Ammonification phosphoric acid obtains nitric acid ammophos, and waste water is returned after processing as use with slurry, and nitric acid ammophos have quick-acting nitrate-NO3 ‑With water-soluble P2O5And long-acting ammoniacal nitrogen-NH4 +With citric acid-soluble P2O5。
Description
Technical field
The present invention relates to a kind of system using ground phosphate rock and mud phosphorus to flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer and sides
Method belongs to resource utilization and field of environment protection.
Background technique
The most common sulfur method of wet process of FGD is calcium method (calcium carbonate and milk of lime) the disadvantage is that (1) is reacted
Activity is low, with Ca+2For absorbent, calcium base and SO2Reactivity not as good as imonium salt absorbent activity；(2) output largely takes off
The stacking of antiseepage cinder field need to be arranged in sulphur waste residue.The desulfurized gypsum of many power plant is overstock year in year out, practical to have formed pollution transportation,
Cause solid secondary pollution；(3) NO in flue gas cannot be removed, resource that can not be useful in recovered flue gas；(4) operating cost compared with
It is high.Limestone desulfurization is based on CaO energy and SO2Reaction generates calcium sulfate and is removed, and lime stone CaO content is generally 55%.
Mud phosphorus is the waste of Zhi Lin factory, degree difference difference of the phosphorus content with purification, the group of dust in mud phosphorus
SiO in point2Account for about 45%, P2O5Account for about 28%, K2O、CaO、A12O3、Fe2O3, F, Pb etc., be the main matter to form mud phosphorus；Therefore
Phosphorous about 5% ~ 40% in mud phosphorus, the main component of other impurity is SiO2、CaO、C、Fe2O3、A12O3Deng remaining is water.In mud phosphorus
SiO2It is the SiF generated in electric furnace4It is formed in water scrubber and by being hydrolyzed in phosphorus slot, hydrophilic SiO2Part forms silicon
Glue, it adsorbs yellow phosphorus, miberal powder, the sundries such as coke dust, wrapped folder part yellow phosphorus, form difficult separation, more stable structure.
Contain a large amount of SO in industrial waste gas2And NO, SO2There is very big pollution to air with NO.Mud phosphorus in the prior art
Processing and the processing of industrial waste gas desulphurization denitration are required to spend a large amount of manpower and material resources, however there is no utilize ground phosphate rock and mud at present
System and method of the phosphorus to flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer.
Summary of the invention
The present invention is in view of the above-mentioned problems of the prior art, provide using ground phosphate rock and mud phosphorus to flue gas desulfurization and denitrification simultaneously
The system and method for by-product nitrophosphate fertilizer；The present invention is de- using desulfurization is carried out to flue gas using ground phosphate rock and mud phosphorus as desulfurization denitrification agent
Nitre processing, removes the SO in flue gas2And NO, make the SO in flue gas2With NO to discharge standard up to standard, using NH4HCO3Ammonification phosphoric acid
Nitric acid ammophos are obtained, waste water is returned after processing as use with slurry.
The present invention removes the SO in flue gas using ground phosphate rock as desulfurizing agent2, reacted using mud phosphorus with oxygen and generate ozone, by cigarette
NO in gas is oxidized to NO2, generation nitric acid and nitrous acid soluble in water carry out decomposing rock phosphate with hydrogen harmful NO are become nitro to stay in
In fertilizer, NO2It is dissolved in water and dissolves the effect of ground phosphate rock；Nitric acid ammophos of the invention have quick-acting nitrate-NO3 -With
Water-soluble P2O5And long-acting ammoniacal nitrogen-NH4 +With citric acid-soluble P2O5。
The present invention be solve its technical problem and the technical solution adopted is that:
It is a kind of using ground phosphate rock and mud phosphorus to the system of flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer, including spray column I 2, curing
Slot I 3, circulating pump I 4, spray column II, digester II, circulating pump II, spray column III, digester III, circulating pump III, slurries storage tank
5, disk filter 7, filtrate receiver 8, ammonification slot 9, filter press 12, inspissator 13, steam exhaust cooler 14, condensed water storage tank 15, tune
Stock tank 16, ground phosphate rock storage tank 17, mud phosphorus storage tank 18；
The smoke inlet end of I 2 bottom of spray column is provided with air blower 1, and the bottoms liquid outlet end of spray column I 2 passes through circulation pipe
Road I is connected to digester I 3, the spray nozzle that the liquid outlet end of digester I 3 passes through I 2 top of circulating line II and spray column
Connecting pipe is connected to, and circulating pump I 4 is provided on circulating line II, and the smoke outlet on I 2 top of spray column passes through flue gas and conveys
Pipeline I is connected to the smoke inlet end of spray column II；The bottoms liquid outlet end of spray column II passes through circulating line III and curing
Slot II is connected to, and the liquid outlet end of digester II is connected by the spray nozzle connecting pipe at II top of circulating line IV and spray column
It is logical, circulating pump II is provided on circulating line IV, the smoke outlet on II top of spray column passes through smoke conveying duct II and spray
The smoke inlet end connection of tower III is drenched, the bottom liquid outlet end of spray column II passes through the bottom of slurries pipeline I and spray column I 2
Fluid inlet end connection；The bottoms liquid outlet end of spray column III is connected to by circulating line V with digester III, digester III
Liquid outlet end be connected to by the spray nozzle connecting pipe at the top of circulating line VI and spray column III, set on circulating line VI
It is equipped with circulating pump III, the smoke outlet emptying on III top of spray column, digester III is connected by slurries pipeline II and digester II
It is logical；
The top of surge tank 16 is provided with the ground phosphate rock storage tank 17 being connected to surge tank 16 and mud phosphorus storage tank 18, sets in surge tank 16
It is equipped with distance mud pump 19, distance mud pump 19 is connected to by slurries pipeline III with III bottom liquid inlet end of spray column；
The liquid outlet end at I 3 top of digester is connected to by slurries pipeline IV with slurries storage tank 5, the slurries of 5 bottom of slurries storage tank
Outlet is connected to by slurries pipeline V with the feed inlet of disk filter 7, and slurries pump 6, disk mistake are provided on slurries pipeline V
The filtrate (liquid of filter 7 is connected to by liquid conducting pipes I with filtrate receiver 8, and the filtrate (liquid of filtrate receiver 8 is provided with filtrate pump
10, the outlet end of filtrate pump 10 is connected to ammonification slot 9 and surge tank 16 respectively by three-way pipeline, the liquid outlet of ammonification slot 9
End is connected to by liquid conducting pipes II with the liquid inlet of filter press 12, and filter pump 11 is provided on liquid conducting pipes II,
The liquid outlet end of filter press 12 is connected to by liquid conducting pipes III with the liquid inlet of inspissator 13, the steam of inspissator 13
Outlet is connected to by gas transmission pipeline with the gas access of steam exhaust cooler 14, and the liquid outlet of steam exhaust cooler 14 passes through liquid
Body conveyance conduit III is connected to condensed water storage tank 15, and the water outlet of condensed water storage tank 15 passes through liquid conducting pipes IV and surge tank
16 connections.
Further, the circulating line I, circulating line II, circulating line III, circulating line IV, circulating line V, follow
Endless tube road VI, smoke conveying duct I, smoke conveying duct II, slurries pipeline I, slurries pipeline II, slurries pipeline III, slurry pipe
Road IV, slurries pipeline V, liquid conducting pipes I, liquid conducting pipes II, liquid conducting pipes III, liquid conducting pipes IV, with
Valve is provided on the two siphunculus road for the three-way pipeline that ammonification slot 9 is connected to surge tank 16.
Further, the bottom of the ground phosphate rock storage tank 17 and mud phosphorus storage tank 18 is also equipped with valve.
A method of using ground phosphate rock and mud phosphorus to flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer, utilizing ground phosphate rock and mud
System of the phosphorus to flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer, the specific steps are as follows:
(1) ground phosphate rock and mud phosphorus are added in surge tank and are sized mixing to obtain ground phosphate rock-mud phosphorus slurry with water, and by phosphorus ore
Powder-mud phosphorus slurry is added in spray column III by distance mud pump and slurries pipeline III；Ground phosphate rock-mud phosphorus slurry is through on spray column III
Circulating line V be transported in digester III and stir curing, ground phosphate rock-mud phosphorus slurry fractions are through circulating line in digester III
Circulating pump III on VI is delivered in the spray piping on III top of spray column, remainder ground phosphate rock-mud phosphorus slurry in digester III
Material is delivered to stir in digester II through slurries pipeline II and cure, and ground phosphate rock-mud phosphorus slurry in digester II is through circulating line
IV is delivered in the spray piping on II top of spray column, and ground phosphate rock-mud phosphorus slurry enters II bottom of spray column through spray nozzle spray
Portion, ground phosphate rock-mud phosphorus slurry fractions of II bottom of spray column, which enter to stir in digester II through circulating line III, to be cured, spray column
The remaining ground phosphate rock in II bottom-mud phosphorus slurry is delivered to bottom in spray column I through slurries pipeline I；
(2) ground phosphate rock of I bottom of spray column-mud phosphorus slurry is delivered to stir in digester I through circulating line I and cure, digester I
Ground phosphate rock-mud phosphorus slurry be transported in the spray piping on I top of spray column through the circulating pump I on circulating line II, by flue gas
It is passed into spray column I by air blower and obtains flue gas A and slurry A, slurry A with red mud slurries progress gas-liquid counter current contact treatment
It is delivered to digester I through circulating line I, ground phosphate rock-mud phosphorus slurry of digester I is transported through the circulating pump I on circulating line II
Ground phosphate rock-mud phosphorus slurry is substituted into the spray piping on I top of spray column；Flue gas A is delivered to spray column through smoke conveying duct I
In II；
(3) II top ground phosphate rock of spray column-mud phosphorus slurry is sprayed through spray nozzle and is obtained with flue gas A progress gas-liquid counter current contact treatment
To flue gas B and slurry B, slurry B enters in digester II through slurries pipeline I through circulating line III, the slurry B warp in digester II
Circulating pump II on circulating line IV is transported to substitution ground phosphate rock-mud phosphorus slurry, flue gas B in the spray piping on II top of spray column
It is delivered in spray column III through smoke conveying duct II；
(4) III top ground phosphate rock of spray column-mud phosphorus slurry is sprayed through spray nozzle and is obtained with flue gas B progress gas-liquid counter current contact treatment
To desulphurization denitration flue gas and slurry C, slurry C enters in digester III through circulating line V, and the slurry C in digester III is through recycling
Circulating pump III on pipeline VI is transported to substitution ground phosphate rock-mud phosphorus slurry, desulphurization denitration in the spray piping on III top of spray column
Flue gas emptying；
(5) when the pH value of slurry A in step (2) digester I is 5 ~ 5.5, the slurry A after circular treatment is through slurries pipeline IV
It is added in slurries storage tank, the slurries in slurries storage tank are delivered to disk filter through the slurries pump on slurries pipeline V and are consolidated
Liquid separation, filtrate enters in filtrate receiver through liquid conducting pipes I, in filtrate receiver filtrate through filtrate pump, three-way pipeline respectively into
Enter into ammonification slot and surge tank, it is 6.5 ~ 7 and will be anti-that the filtrate in ammonification slot, which is reacted with ammonium hydrogen carbonate to the pH of liquid system,
Liquid system after answering enters in filter press through the filter pump on liquid conducting pipes II to be separated by solid-liquid separation, and liquid is nitric acid
Ammonium phosphate solution, nitric acid ammonium phosphate solution enter in inspissator the mass percent for being concentrated into nitric acid phosphorus ammonium through liquid conducting pipes III
Content is 92 ~ 95%, and the nitric acid ammonium phosphate solution after being concentrated in inspissator takes out crystallisation by cooling and obtains nitric acid phosphorus ammonium crystal；Inspissator
In vapor be delivered in steam exhaust cooler through gas transmission pipeline cooling, cooling water is delivered to cold through liquid conducting pipes III
It is stored in condensate storage tank, the water liquid conveyance conduit IV in condensed water storage tank enters in surge tank to be mixed with ground phosphate rock and mud phosphorus
It sizes mixing.
Further, partial size is that -250 mesh account for 80% or more in the ground phosphate rock；
Further, the ground phosphate rock and SO in flue gas2Mass ratio be (90~100): 1；The quality of NO in mud phosphorus and flue gas
Than for (7 ~ 8): 1；
Further, the total mass fraction concentration of ground phosphate rock and mud phosphorus is 7 ~ 8% in the ground phosphate rock-mud phosphorus slurry；
Further, the curing time of slurry is 15 ~ 20min, spray column in the digester I, digester II and digester III
I, the sprinkle density of spray column II and spray column III is 15 ~ 20m3/m2·h。
The principle of the invention:
Flue gas desulfurization:
(1) SO of the flue gas with ground phosphate rock plasm scouring, in tail gas2Following reaction occurs for generation sulfurous acid soluble in water first:
2H2O + 2SO2 = 2H2SO3
(2) sulfurous acid in water reacts with the rock phosphate in powder in phosphorus ore slurry, generation calcium monohydrogen phosphate and calcium sulfate, in tail gas
SO2It being removed, tail gas is purified, it reacts as follows:
Ca5F(PO4)3 +2 H2SO3 +O2=2 CaSO4↓+3 CaHPO4+HF
Ca5F(PO4)3 +2SO2+2H2O+O2=2 CaSO4↓+3 CaHPO4+HF
2HF + CaO =CaF2 + H2O
(3) yellow phosphorus is contacted with the dissolved oxygen in slurries generates ozone, reacts as follows:
P4 + 5O2 → 4PO + 2O3
2PO + 1.5O2 + 2CaO + H2O→ 2CaHPO4
NO + O3 = NO2 + O2
The ozone of generation participates in becoming nitric oxide production strong oxidizer in flue gas from evolution in solution.Ozone, which reoxidizes NO, to be become
Higher nitrogen oxides improve solubility in water, to slough NO, reach the purpose of qualified discharge.
(4) NO generated2Solution water generates nitric acid and nitrous acid:
2NO2 + H2O = HNO3 +HNO2
(5) desulfurization and yellow phosphorus produce the CaHPO of ozone generation4With nitric acid, nitrite reaction:
CaHPO4 + 2HNO3 = Ca(NO3)2 + H3PO3
CaHPO4 + 2HNO2 = Ca(NO2)2 + H3PO3
Fe in ground phosphate rock2O3、Al2O3With nitric acid reaction, nitrate is generated, part nitric acid is consumed:
Fe2O3 +6HNO3 =2Fe(NO3)3 + 3H2O
Al2O3 + 6HNO3 = 2Al(NO3)3 + 3H2O
(6) solution NH4HCO3Ammonification generates nitrophosphate fertilizer
Contain Ca (NO in the resulting solution of desulphurization denitration3)2、H3PO4、Fe(NO3)3、Al(NO3)3Equal substances, in ammonium bicarbonate ammonification
With following reaction occurs:
1. calcium nitrate Ca (NO3)2Aminating reaction
Ca(NO3)2+ 2NH4HCO3 = 2NH4NO3+ Ca(HCO3)2↓
2. calcium nitrite Ca (NO2)2Aminating reaction
Ca(NO2)2+ 2NH4HCO3 =2NH4NO2+ Ca(HCO3)2↓
3. the aminating reaction of phosphoric acid
H3PO4 + 3NH4HCO3 =(NH4)3PO4 + 3H2O + 3CO2
2Fe(NO3)3+ 6NH4HCO3 =6NH4NO3 +3CO2+ Fe2O3·3H2O↓
2Al(NO3)3+ 6NH4HCO3 =6NH4NO3 +6CO2+ 2Al(OH)3↓
Ammoniated solution filtering removes sediment, and it is 92 ~ 95% that nitric acid ammonium phosphate solution, which is concentrated into mass percent concentration, takes out cooling
It crystallizes up to nitric acid ammophos.
Beneficial effects of the present invention:
(1) ground phosphate rock desulfurization of the present invention, which belongs to, increases nuclear reaction, and with the passage in reaction time, ground phosphate rock resolution ratio can gradually decline,
It is quite unfavorable to desulfurization；Ground phosphate rock denitration category condensation reaction, can be by crystal such as calcium monohydrogen phosphate, sulfuric acid that ground phosphate rock desulfurization generates
Magnesium dissolution, advantageous to desulfurization, ground phosphate rock desulfurization and denitrification integral process is more advantageous than single desulfurization；
(2) present invention realizes that nitrogen Resource recoveryization utilizes, and does not generate secondary pollution, and nitrogen content 37 ~ 38% can be recycled in 1000kgNO,
9 ~ 9.5 tons of the nitrophosphate fertilizer of phosphorus content 10 ~ 11%；
(3) nitric acid ammophos of the invention have quick-acting nitrate-NO3 -With water-soluble P2O5And long-acting ammoniacal nitrogen-
NH4 +With citric acid-soluble P2O5。
Detailed description of the invention
Fig. 1 is the structural schematic diagram using ground phosphate rock and mud phosphorus to flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer；
Wherein: 1- air blower, 2- spray column I, 3- digester I, 4- circulating pump I, 5- slurries storage tank, 6- slurries pump, 7- disk mistake
Filter, 8- filtrate receiver, 9- ammonification slot, 10- filtrate pump, 11- filter pump, 12- filter press, 13- inspissator, 14- steam exhaust cooler,
15- condensate draining, 16- surge tank, 17- ground phosphate rock storage tank, 18- mud phosphorus storage tank, 19- distance mud pump.
Specific embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1: as shown in Figure 1, it is a kind of using ground phosphate rock and mud phosphorus to flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer
System, including spray column I 2, digester I 3, circulating pump I 4, spray column II, digester II, circulating pump II, spray column III, curing
Slot III, circulating pump III, slurries storage tank 5, disk filter 7, filtrate receiver 8, ammonification slot 9, filter press 12, inspissator 13, steam exhaust are cold
But device 14, condensed water storage tank 15, surge tank 16, ground phosphate rock storage tank 17, mud phosphorus storage tank 18；
The smoke inlet end of I 2 bottom of spray column is provided with air blower 1, and the bottoms liquid outlet end of spray column I 2 passes through circulation pipe
Road I is connected to digester I 3, the spray nozzle that the liquid outlet end of digester I 3 passes through I 2 top of circulating line II and spray column
Connecting pipe is connected to, and circulating pump I 4 is provided on circulating line II, and the smoke outlet on I 2 top of spray column passes through flue gas and conveys
Pipeline I is connected to the smoke inlet end of spray column II；The bottoms liquid outlet end of spray column II passes through circulating line III and curing
Slot II is connected to, and the liquid outlet end of digester II is connected by the spray nozzle connecting pipe at II top of circulating line IV and spray column
It is logical, circulating pump II is provided on circulating line IV, the smoke outlet on II top of spray column passes through smoke conveying duct II and spray
The smoke inlet end connection of tower III is drenched, the bottom liquid outlet end of spray column II passes through the bottom of slurries pipeline I and spray column I 2
Fluid inlet end connection；The bottoms liquid outlet end of spray column III is connected to by circulating line V with digester III, digester III
Liquid outlet end be connected to by the spray nozzle connecting pipe at the top of circulating line VI and spray column III, set on circulating line VI
It is equipped with circulating pump III, the smoke outlet emptying on III top of spray column, digester III is connected by slurries pipeline II and digester II
It is logical；
The top of surge tank 16 is provided with the ground phosphate rock storage tank 17 being connected to surge tank 16 and mud phosphorus storage tank 18, sets in surge tank 16
It is equipped with distance mud pump 19, distance mud pump 19 is connected to by slurries pipeline III with III bottom liquid inlet end of spray column；
The liquid outlet end at I 3 top of digester is connected to by slurries pipeline IV with slurries storage tank 5, the slurries of 5 bottom of slurries storage tank
Outlet is connected to by slurries pipeline V with the feed inlet of disk filter 7, and slurries pump 6, disk mistake are provided on slurries pipeline V
The filtrate (liquid of filter 7 is connected to by liquid conducting pipes I with filtrate receiver 8, and the filtrate (liquid of filtrate receiver 8 is provided with filtrate pump
10, the outlet end of filtrate pump 10 is connected to ammonification slot 9 and surge tank 16 respectively by three-way pipeline, the liquid outlet of ammonification slot 9
End is connected to by liquid conducting pipes II with the liquid inlet of filter press 12, and filter pump 11 is provided on liquid conducting pipes II,
The liquid outlet end of filter press 12 is connected to by liquid conducting pipes III with the liquid inlet of inspissator 13, the steam of inspissator 13
Outlet is connected to by gas transmission pipeline with the gas access of steam exhaust cooler 14, and the liquid outlet of steam exhaust cooler 14 passes through liquid
Body conveyance conduit III is connected to condensed water storage tank 15, and the water outlet of condensed water storage tank 15 passes through liquid conducting pipes IV and surge tank
16 connections；
Circulating line I, circulating line II, circulating line III, circulating line IV, circulating line V, circulating line VI, flue gas conveying
Pipeline I, smoke conveying duct II, slurries pipeline I, slurries pipeline II, slurries pipeline III, slurries pipeline IV, slurries pipeline V, liquid
Body conveyance conduit I, liquid conducting pipes II, liquid conducting pipes III, liquid conducting pipes IV and ammonification slot 9 and surge tank 16
Valve is provided on the two siphunculus road of the three-way pipeline of connection；
The bottom of ground phosphate rock storage tank 17 and mud phosphorus storage tank 18 is also equipped with valve；
A method of using ground phosphate rock and mud phosphorus to flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer, ground phosphate rock is utilized using above-mentioned
With mud phosphorus to the system of flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer, the specific steps are as follows:
(1) ground phosphate rock and mud phosphorus are added in surge tank and are sized mixing to obtain ground phosphate rock-mud phosphorus slurry with water, and by phosphorus ore
Powder-mud phosphorus slurry is added in spray column III by distance mud pump and slurries pipeline III；Ground phosphate rock-mud phosphorus slurry is through on spray column III
Circulating line V be transported in digester III and stir curing, ground phosphate rock-mud phosphorus slurry fractions are through circulating line in digester III
Circulating pump III on VI is delivered in the spray piping on III top of spray column, remainder ground phosphate rock-mud phosphorus slurry in digester III
Material is delivered to stir in digester II through slurries pipeline II and cure, and ground phosphate rock-mud phosphorus slurry in digester II is through circulating line
IV is delivered in the spray piping on II top of spray column, and ground phosphate rock-mud phosphorus slurry enters II bottom of spray column through spray nozzle spray
Portion, ground phosphate rock-mud phosphorus slurry fractions of II bottom of spray column, which enter to stir in digester II through circulating line III, to be cured, spray column
The remaining ground phosphate rock in II bottom-mud phosphorus slurry is delivered to bottom in spray column I through slurries pipeline I；
(2) ground phosphate rock of I bottom of spray column-mud phosphorus slurry is delivered to stir in digester I through circulating line I and cure, digester I
Ground phosphate rock-mud phosphorus slurry be transported in the spray piping on I top of spray column through the circulating pump I on circulating line II, by flue gas
It is passed into spray column I by air blower and obtains flue gas A and slurry A, slurry A with red mud slurries progress gas-liquid counter current contact treatment
It is delivered to digester I through circulating line I, ground phosphate rock-mud phosphorus slurry of digester I is transported through the circulating pump I on circulating line II
Ground phosphate rock-mud phosphorus slurry is substituted into the spray piping on I top of spray column；Flue gas A is delivered to spray column through smoke conveying duct I
In II；
(3) II top ground phosphate rock of spray column-mud phosphorus slurry is sprayed through spray nozzle and is obtained with flue gas A progress gas-liquid counter current contact treatment
To flue gas B and slurry B, slurry B enters in digester II through slurries pipeline I through circulating line III, the slurry B warp in digester II
Circulating pump II on circulating line IV is transported to substitution ground phosphate rock-mud phosphorus slurry, flue gas B in the spray piping on II top of spray column
It is delivered in spray column III through smoke conveying duct II；
(4) III top ground phosphate rock of spray column-mud phosphorus slurry is sprayed through spray nozzle and is obtained with flue gas B progress gas-liquid counter current contact treatment
To desulphurization denitration flue gas and slurry C, slurry C enters in digester III through circulating line V, and the slurry C in digester III is through recycling
Circulating pump III on pipeline VI is transported to substitution ground phosphate rock-mud phosphorus slurry, desulphurization denitration in the spray piping on III top of spray column
Flue gas emptying；
(5) when the pH value of slurry A in step (2) digester I is 5 ~ 5.5, the slurry A after circular treatment adds through slurries pipeline IV
Enter into slurries storage tank, the slurries in slurries storage tank are delivered to disk filter through the slurries pump on slurries pipeline V and carry out solid-liquid
Separation, filtrate enter in filtrate receiver through liquid conducting pipes I, and filtrate respectively enters through filtrate pump, three-way pipeline in filtrate receiver
Into ammonification slot and surge tank, the filtrate in ammonification slot is reacted with ammonium hydrogen carbonate to be 6.5 ~ 7 to the pH of liquid system and will react
Liquid system afterwards is entered in filter press through the filter pump on liquid conducting pipes II and is separated by solid-liquid separation, and liquid is nitric acid phosphorus
Ammonium salt solution, nitric acid ammonium phosphate solution enters in inspissator through liquid conducting pipes III to be concentrated into the mass percent of nitric acid phosphorus ammonium and contains
Amount is 92 ~ 95%, and the nitric acid ammonium phosphate solution after being concentrated in inspissator takes out crystallisation by cooling and obtains nitric acid phosphorus ammonium crystal；In inspissator
Vapor be delivered in steam exhaust cooler through gas transmission pipeline cooling, cooling water is delivered to condensation through liquid conducting pipes III
It is stored in water storage tank, the water liquid conveyance conduit IV in condensed water storage tank, which enters in surge tank, mixes tune with ground phosphate rock and mud phosphorus
Slurry；
Partial size is that -250 mesh account for 80% or more in ground phosphate rock；
SO in ground phosphate rock and flue gas2Mass ratio be (90~100): 1；The mass ratio of NO is (7 ~ 8) in mud phosphorus and flue gas: 1；
The total mass fraction concentration of ground phosphate rock and mud phosphorus is 7 ~ 8% in ground phosphate rock-mud phosphorus slurry；
The curing time of slurry is 15 ~ 20min, spray column I, spray column II and spray in digester I, digester II and digester III
The sprinkle density for drenching tower III is 15 ~ 20m3/m2·h。
Embodiment 2: flue gas is copper refining exhaust gas, 160000m in flue gas in the present embodiment3/H contains SO in flue gas2
850mg/m3, NO 550mg/m3；Phosphorus ore powder component: P2O527.1%, CaO 47.24%, MgO 4.2%, SiO2 6.43%,Fe2O3
0.95%;Al2O3 0.92%,CO29.73%, F 2.9%, other 1.45%, partial size is that -250 mesh account for 80% or more；Mud phosphorus component
General phosphorous about 5%~40%, the main component of other impurity is SiO2、CaO、C、Fe2O3、A12O3Deng；
A method of using ground phosphate rock and mud phosphorus to flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer, ground phosphate rock is utilized using above-mentioned
With mud phosphorus to the system of flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer, the specific steps are as follows:
(1) 13.5~14 tons/h of ground phosphate rock and mud phosphorus (butt meter) 380~400kg/h are added in surge tank and are adjusted with water
Slurry obtains ground phosphate rock-mud phosphorus slurry, is made into 40~50% concentration, and ground phosphate rock-mud phosphorus slurry is passed through distance mud pump and slurries pipeline
III is added in spray column III；Ground phosphate rock-mud phosphorus slurry is transported in digester III through the circulating line V on spray column III and stirs
Curing is mixed, ground phosphate rock-mud phosphorus slurry fractions are delivered to spray column III through the circulating pump III on circulating line VI and push up in digester III
In the spray piping at end, remainder ground phosphate rock-mud phosphorus slurry is delivered in digester II through slurries pipeline II in digester III
Stirring cures, and ground phosphate rock-mud phosphorus slurry in digester II is delivered to the spray piping on II top of spray column through circulating line IV
In, ground phosphate rock-mud phosphorus slurry enters II bottom of spray column, ground phosphate rock-mud phosphorus slurry of II bottom of spray column through spray nozzle spray
Material part, which enters to stir in digester II through circulating line III, to be cured, the remaining ground phosphate rock in II bottom of spray column-mud phosphorus slurry warp
Slurries pipeline I is delivered to bottom in spray column I；
(2) ground phosphate rock of I bottom of spray column-mud phosphorus slurry is delivered to stir in digester I through circulating line I and cure, digester I
Ground phosphate rock-mud phosphorus slurry be transported in the spray piping on I top of spray column through the circulating pump I on circulating line II, by flue gas
It is passed into spray column I by air blower and obtains flue gas A and slurry A, slurry A with red mud slurries progress gas-liquid counter current contact treatment
It is delivered to digester I through circulating line I, ground phosphate rock-mud phosphorus slurry of digester I is transported through the circulating pump I on circulating line II
Ground phosphate rock-mud phosphorus slurry is substituted into the spray piping on I top of spray column；Flue gas A is delivered to spray column through smoke conveying duct I
In II；
(3) II top ground phosphate rock of spray column-mud phosphorus slurry is sprayed through spray nozzle and is obtained with flue gas A progress gas-liquid counter current contact treatment
To flue gas B and slurry B, slurry B enters in digester II through slurries pipeline I through circulating line III, the slurry B warp in digester II
Circulating pump II on circulating line IV is transported to substitution ground phosphate rock-mud phosphorus slurry, flue gas B in the spray piping on II top of spray column
It is delivered in spray column III through smoke conveying duct II；
(4) III top ground phosphate rock of spray column-mud phosphorus slurry is sprayed through spray nozzle and is obtained with flue gas B progress gas-liquid counter current contact treatment
To desulphurization denitration flue gas and slurry C, slurry C enters in digester III through circulating line V, and the slurry C in digester III is through recycling
Circulating pump III on pipeline VI is transported to substitution ground phosphate rock-mud phosphorus slurry, desulphurization denitration in the spray piping on III top of spray column
Flue gas emptying；
(5) when the pH value of slurry A in step (2) digester I is 5 ~ 5.5, the slurry A after circular treatment is through slurries pipeline IV
It is added in slurries storage tank, the slurries in slurries storage tank are delivered to disk filter through the slurries pump on slurries pipeline V and are consolidated
Liquid separation, filtrate enters in filtrate receiver through liquid conducting pipes I, in filtrate receiver filtrate through filtrate pump, three-way pipeline respectively into
Enter into ammonification slot and surge tank, it is 6.5 ~ 7 and will be anti-that the filtrate in ammonification slot, which is reacted with ammonium hydrogen carbonate to the pH of liquid system,
Liquid system after answering enters in filter press through the filter pump on liquid conducting pipes II to be separated by solid-liquid separation, and liquid is nitric acid
Ammonium phosphate solution, nitric acid ammonium phosphate solution enter in inspissator the mass percent for being concentrated into nitric acid phosphorus ammonium through liquid conducting pipes III
Content is 92 ~ 95%, and the nitric acid ammonium phosphate solution after being concentrated in inspissator takes out crystallisation by cooling and obtains nitric acid phosphorus ammonium crystal；Inspissator
In vapor be delivered in steam exhaust cooler through gas transmission pipeline cooling, cooling water is delivered to cold through liquid conducting pipes III
It is stored in condensate storage tank, the water liquid conveyance conduit IV in condensed water storage tank enters in surge tank to be mixed with ground phosphate rock and mud phosphorus
It sizes mixing；
The curing time of slurry is 15 min, spray column I, spray in digester I, digester II and digester III in the present embodiment
The sprinkle density of tower II and spray column III is 15 m3/m2·h；
Contain SO in the present embodiment desulphurization denitration exiting flue gas2 100mg/m3, NO 150mg/m3；
With 160000m in flue gas3/H meter, concentrate is placed on wide opening and collects natural cooling in basin after concentration, and self-contained crystalline solid is small
When produce four water nitre calcium 430kg, produce four 3300~3500 tons of water nitre calcium per year.In nitric acid phosphorus ammonium nitrogen mass percent content be 37 ~
38%, phosphorus mass percent content is 10 ~ 11%.
Embodiment 3: flue gas is copper refining exhaust gas, exhaust gas volumn 300000m in the present embodiment3/ h contains SO in flue gas2
1500mg/m3, NO 650mg/m3；Phosphorus ore powder component；P2O527.1%, CaO 47.24%, MgO 4.2%, SiO2 6.43%,
Fe2O3 0.95%;Al2O3 0.92%,CO29.73%, F 2.9%, other 1.45%, partial size is that -250 mesh account for 80% or more；Mud phosphorus group
Point；General phosphorous about 5%~40%, the main component of other impurity is SiO2、CaO、C、Fe2O3、A12O3Deng
A method of using ground phosphate rock and mud phosphorus to flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer, ground phosphate rock is utilized using above-mentioned
With mud phosphorus to the system of flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer, the specific steps are as follows:
(1) 45~50 tons/h of ground phosphate rock and mud phosphorus (butt meter) 1000~1100kg/h are added in surge tank and are adjusted with water
Slurry obtains ground phosphate rock-mud phosphorus slurry, is made into 40~50% concentration, and ground phosphate rock-mud phosphorus slurry is passed through distance mud pump and slurries pipeline
III is added in spray column III；Ground phosphate rock-mud phosphorus slurry is transported in digester III through the circulating line V on spray column III and stirs
Curing is mixed, ground phosphate rock-mud phosphorus slurry fractions are delivered to spray column III through the circulating pump III on circulating line VI and push up in digester III
In the spray piping at end, remainder ground phosphate rock-mud phosphorus slurry is delivered in digester II through slurries pipeline II in digester III
Stirring cures, and ground phosphate rock-mud phosphorus slurry in digester II is delivered to the spray piping on II top of spray column through circulating line IV
In, ground phosphate rock-mud phosphorus slurry enters II bottom of spray column, ground phosphate rock-mud phosphorus slurry of II bottom of spray column through spray nozzle spray
Material part, which enters to stir in digester II through circulating line III, to be cured, the remaining ground phosphate rock in II bottom of spray column-mud phosphorus slurry warp
Slurries pipeline I is delivered to bottom in spray column I；
(2) ground phosphate rock of I bottom of spray column-mud phosphorus slurry is delivered to stir in digester I through circulating line I and cure, digester I
Ground phosphate rock-mud phosphorus slurry be transported in the spray piping on I top of spray column through the circulating pump I on circulating line II, by flue gas
It is passed into spray column I by air blower and obtains flue gas A and slurry A, slurry A with red mud slurries progress gas-liquid counter current contact treatment
It is delivered to digester I through circulating line I, ground phosphate rock-mud phosphorus slurry of digester I is transported through the circulating pump I on circulating line II
Ground phosphate rock-mud phosphorus slurry is substituted into the spray piping on I top of spray column；Flue gas A is delivered to spray column through smoke conveying duct I
In II；
(3) II top ground phosphate rock of spray column-mud phosphorus slurry is sprayed through spray nozzle and is obtained with flue gas A progress gas-liquid counter current contact treatment
To flue gas B and slurry B, slurry B enters in digester II through slurries pipeline I through circulating line III, the slurry B warp in digester II
Circulating pump II on circulating line IV is transported to substitution ground phosphate rock-mud phosphorus slurry, flue gas B in the spray piping on II top of spray column
It is delivered in spray column III through smoke conveying duct II；
(4) III top ground phosphate rock of spray column-mud phosphorus slurry is sprayed through spray nozzle and is obtained with flue gas B progress gas-liquid counter current contact treatment
To desulphurization denitration flue gas and slurry C, slurry C enters in digester III through circulating line V, and the slurry C in digester III is through recycling
Circulating pump III on pipeline VI is transported to substitution ground phosphate rock-mud phosphorus slurry, desulphurization denitration in the spray piping on III top of spray column
Flue gas emptying；
(5) when the pH value of slurry A in step (2) digester I is 5 ~ 5.5, the slurry A after circular treatment is through slurries pipeline IV
It is added in slurries storage tank, the slurries in slurries storage tank are delivered to disk filter through the slurries pump on slurries pipeline V and are consolidated
Liquid separation, filtrate enters in filtrate receiver through liquid conducting pipes I, in filtrate receiver filtrate through filtrate pump, three-way pipeline respectively into
Enter into ammonification slot and surge tank, it is 6.5 ~ 7 and will be anti-that the filtrate in ammonification slot, which is reacted with ammonium hydrogen carbonate to the pH of liquid system,
Liquid system after answering enters in filter press through the filter pump on liquid conducting pipes II to be separated by solid-liquid separation, and liquid is nitric acid
Ammonium phosphate solution, nitric acid ammonium phosphate solution enter in inspissator the mass percent for being concentrated into nitric acid phosphorus ammonium through liquid conducting pipes III
Content is 92 ~ 95%, and the nitric acid ammonium phosphate solution after being concentrated in inspissator takes out crystallisation by cooling and obtains nitric acid phosphorus ammonium crystal；Inspissator
In vapor be delivered in steam exhaust cooler through gas transmission pipeline cooling, cooling water is delivered to cold through liquid conducting pipes III
It is stored in condensate storage tank, the water liquid conveyance conduit IV in condensed water storage tank enters in surge tank to be mixed with ground phosphate rock and mud phosphorus
It sizes mixing；
The curing time of slurry is 16min, spray column I, spray in digester I, digester II and digester III in the present embodiment
The sprinkle density of tower II and spray column III is 18 m3/m2·h；
Contain SO in the present embodiment desulphurization denitration exiting flue gas2 100mg/m3, 200 mg/m of NO3；
Concentrate is placed on wide opening and collects natural cooling in basin, self-contained crystalline solid after concentration, hour produce four water nitre calcium 1200~
1300kg produces four 9350~10000 tons of water nitre calcium per year；Nitrogen mass percent content is 37 ~ 38% in nitric acid phosphorus ammonium, phosphorus quality hundred
Fractional content is 10 ~ 11%.
Embodiment 4: flue gas is copper refining exhaust gas, exhaust gas volumn 200000m in the present embodiment3/ h contains SO in flue gas2
1800mg/m3, 650 mg/m of NO3；Phosphorus ore powder component；P2O531.1%, CaO 45.15%, MgO 0.9%, SiO2 13.46%,
Fe2O3 1.1%;Al2O3 0.92%,CO23.2%, F 3.04%, other 1.17%, partial size is that -250 mesh account for 80% or more；Mud phosphorus group
Point；General phosphorous about 5%~40%, the main component of other impurity is SiO2、CaO、C、Fe2O3、A12O3Deng
A method of using ground phosphate rock and mud phosphorus to flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer, ground phosphate rock is utilized using above-mentioned
With mud phosphorus to the system of flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer, the specific steps are as follows:
(1) 36~40 tons/h of ground phosphate rock and mud phosphorus (butt meter) 600~700kg/h are added in surge tank and are sized mixing with water
Ground phosphate rock-mud phosphorus slurry is obtained, 40~50% concentration is made into, ground phosphate rock-mud phosphorus slurry is passed through into distance mud pump and slurries pipeline
III is added in spray column III；Ground phosphate rock-mud phosphorus slurry is transported in digester III through the circulating line V on spray column III and stirs
Curing is mixed, ground phosphate rock-mud phosphorus slurry fractions are delivered to spray column III through the circulating pump III on circulating line VI and push up in digester III
In the spray piping at end, remainder ground phosphate rock-mud phosphorus slurry is delivered in digester II through slurries pipeline II in digester III
Stirring cures, and ground phosphate rock-mud phosphorus slurry in digester II is delivered to the spray piping on II top of spray column through circulating line IV
In, ground phosphate rock-mud phosphorus slurry enters II bottom of spray column, ground phosphate rock-mud phosphorus slurry of II bottom of spray column through spray nozzle spray
Material part, which enters to stir in digester II through circulating line III, to be cured, the remaining ground phosphate rock in II bottom of spray column-mud phosphorus slurry warp
Slurries pipeline I is delivered to bottom in spray column I；
(2) ground phosphate rock of I bottom of spray column-mud phosphorus slurry is delivered to stir in digester I through circulating line I and cure, digester I
Ground phosphate rock-mud phosphorus slurry be transported in the spray piping on I top of spray column through the circulating pump I on circulating line II, by flue gas
It is passed into spray column I by air blower and obtains flue gas A and slurry A, slurry A with red mud slurries progress gas-liquid counter current contact treatment
It is delivered to digester I through circulating line I, ground phosphate rock-mud phosphorus slurry of digester I is transported through the circulating pump I on circulating line II
Ground phosphate rock-mud phosphorus slurry is substituted into the spray piping on I top of spray column；Flue gas A is delivered to spray column through smoke conveying duct I
In II；
(3) II top ground phosphate rock of spray column-mud phosphorus slurry is sprayed through spray nozzle and is obtained with flue gas A progress gas-liquid counter current contact treatment
To flue gas B and slurry B, slurry B enters in digester II through slurries pipeline I through circulating line III, the slurry B warp in digester II
Circulating pump II on circulating line IV is transported to substitution ground phosphate rock-mud phosphorus slurry, flue gas B in the spray piping on II top of spray column
It is delivered in spray column III through smoke conveying duct II；
(4) III top ground phosphate rock of spray column-mud phosphorus slurry is sprayed through spray nozzle and is obtained with flue gas B progress gas-liquid counter current contact treatment
To desulphurization denitration flue gas and slurry C, slurry C enters in digester III through circulating line V, and the slurry C in digester III is through recycling
Circulating pump III on pipeline VI is transported to substitution ground phosphate rock-mud phosphorus slurry, desulphurization denitration in the spray piping on III top of spray column
Flue gas emptying；
(5) when the pH value of slurry A in step (2) digester I is 5 ~ 5.5, the slurry A after circular treatment is through slurries pipeline IV
It is added in slurries storage tank, the slurries in slurries storage tank are delivered to disk filter through the slurries pump on slurries pipeline V and are consolidated
Liquid separation, filtrate enters in filtrate receiver through liquid conducting pipes I, in filtrate receiver filtrate through filtrate pump, three-way pipeline respectively into
Enter into ammonification slot and surge tank, it is 6.5 ~ 7 and will be anti-that the filtrate in ammonification slot, which is reacted with ammonium hydrogen carbonate to the pH of liquid system,
Liquid system after answering enters in filter press through the filter pump on liquid conducting pipes II to be separated by solid-liquid separation, and liquid is nitric acid
Ammonium phosphate solution, nitric acid ammonium phosphate solution enter in inspissator the mass percent for being concentrated into nitric acid phosphorus ammonium through liquid conducting pipes III
Content is 92 ~ 95%, and the nitric acid ammonium phosphate solution after being concentrated in inspissator takes out crystallisation by cooling and obtains nitric acid phosphorus ammonium crystal；Inspissator
In vapor be delivered in steam exhaust cooler through gas transmission pipeline cooling, cooling water is delivered to cold through liquid conducting pipes III
It is stored in condensate storage tank, the water liquid conveyance conduit IV in condensed water storage tank enters in surge tank to be mixed with ground phosphate rock and mud phosphorus
It sizes mixing；
The curing time of slurry is 18 min, spray column I, spray in digester I, digester II and digester III in the present embodiment
The sprinkle density for drenching tower II and spray column III is 18 m3/m2·h；
Contain SO in the present embodiment desulphurization denitration exiting flue gas2 100mg/m3, NO200mg/m3；
Concentrate is placed on wide opening and collects natural cooling in basin, self-contained crystalline solid after concentration, and hour produces four water nitre 700~750kg of calcium,
Produce four 6000~6500 tons of water nitre calcium per year；Nitrogen mass percent content is 37 ~ 38% in nitric acid phosphorus ammonium, phosphorus mass percent content
It is 10 ~ 11%.
Specific embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned realities
Example is applied, it within the knowledge of a person skilled in the art, can also be without departing from the purpose of the present invention
Various changes can be made.
Claims (8)
1. it is a kind of using ground phosphate rock and mud phosphorus to the system of flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer, it is characterised in that: including
Spray column I (2), digester I (3), circulating pump I (4), spray column II, digester II, circulating pump II, spray column III, digester
III, circulating pump III, slurries storage tank (5), disk filter (7), filtrate receiver (8), ammonification slot (9), filter press (12), inspissator
(13), steam exhaust cooler (14), condensed water storage tank (15), surge tank (16), ground phosphate rock storage tank (17), mud phosphorus storage tank (18)；
The smoke inlet end of spray column I (2) bottom is provided with air blower (1), and the bottoms liquid outlet end of spray column I (2) passes through
Circulating line I is connected to digester I (3), and the liquid outlet end of digester I (3) is pushed up by circulating line II and spray column I (2)
The spray nozzle connecting pipe in portion is connected to, and is provided with circulating pump I (4) on circulating line II, the flue gas on spray column I (2) top goes out
Mouth end is connected to by smoke conveying duct I with the smoke inlet end of spray column II；The bottoms liquid outlet end of spray column II passes through
Circulating line III is connected to digester II, the spray that the liquid outlet end of digester II passes through II top of circulating line IV and spray column
A connecting pipe connection is sprayed, is provided with circulating pump II on circulating line IV, the smoke outlet on II top of spray column passes through cigarette
Letter shoot road II is connected to the smoke inlet end of spray column III, and the bottom liquid outlet end of spray column II passes through slurries pipeline I
It is connected to the bottom liquid inlet end of spray column I (2)；The bottoms liquid outlet end of spray column III passes through circulating line V and curing
Slot III is connected to, and the liquid outlet end of digester III is connected by the spray nozzle connecting pipe at III top of circulating line VI and spray column
It is logical, circulating pump III, the smoke outlet emptying on III top of spray column are provided on circulating line VI, digester III passes through slurry pipe
Road II is connected to digester II；
The top of surge tank (16) is provided with the ground phosphate rock storage tank (17) and mud phosphorus storage tank (18) being connected to surge tank (16), sizes mixing
It is provided with distance mud pump (19) in slot (16), distance mud pump (19) is connected by slurries pipeline III and III bottom liquid inlet end of spray column
It is logical；
Liquid outlet end at the top of digester I (3) is connected to by slurries pipeline IV with slurries storage tank (5), slurries storage tank (5) bottom
Serum outlet be connected to the feed inlet of disk filter (7) by slurries pipeline V, slurries are provided on slurries pipeline V and are pumped
(6), the filtrate (liquid of disk filter (7) is connected to by liquid conducting pipes I with filtrate receiver (8), and the filtrate of filtrate receiver (8) goes out
Mouthful be provided with filtrate pump (10), the outlet end of filtrate pump (10) by three-way pipeline respectively with ammonification slot (9) and surge tank (16)
The liquid outlet end of connection, ammonification slot (9) is connected to by liquid conducting pipes II with the liquid inlet of filter press (12), and liquid is defeated
It send and is provided on pipeline II filter pump (11), the liquid outlet end of filter press (12) passes through liquid conducting pipes III and inspissator
(13) liquid inlet connection, the vapor outlet port of inspissator (13) pass through the gas of gas transmission pipeline and steam exhaust cooler (14)
The liquid outlet of entrance connection, steam exhaust cooler (14) is connected to by liquid conducting pipes III with condensed water storage tank (15), is condensed
The water outlet of water storage tank (15) is connected to by liquid conducting pipes IV with surge tank (16).
2. according to claim 1 using ground phosphate rock and mud phosphorus to the system of flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer,
It is characterized in that: circulating line I, circulating line II, circulating line III, circulating line IV, circulating line V, circulating line VI, cigarette
Letter shoot road I, smoke conveying duct II, slurries pipeline I, slurries pipeline II, slurries pipeline III, slurries pipeline IV, slurry pipe
Road V, liquid conducting pipes I, liquid conducting pipes II, liquid conducting pipes III, liquid conducting pipes IV, with ammonification slot (9) and
Valve is provided on the two siphunculus road of the three-way pipeline of surge tank (16) connection.
3. it is according to claim 1 or claim 2 using ground phosphate rock and mud phosphorus to the system of flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer,
It is characterized by: the bottom of ground phosphate rock storage tank (17) and mud phosphorus storage tank (18) is also equipped with valve.
4. it is a kind of using ground phosphate rock and mud phosphorus to the method for flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer, which is characterized in that use
It is described in claim 1 using ground phosphate rock and mud phosphorus to the system of flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer, specific steps are such as
Under:
(1) ground phosphate rock and mud phosphorus are added in surge tank and are sized mixing to obtain ground phosphate rock-mud phosphorus slurry with water, and by phosphorus ore
Powder-mud phosphorus slurry is added in spray column III by distance mud pump and slurries pipeline III；Ground phosphate rock-mud phosphorus slurry is through on spray column III
Circulating line V be transported in digester III and stir curing, ground phosphate rock-mud phosphorus slurry fractions are through circulating line in digester III
Circulating pump III on VI is delivered in the spray piping on III top of spray column, remainder ground phosphate rock-mud phosphorus slurry in digester III
Material is delivered to stir in digester II through slurries pipeline II and cure, and ground phosphate rock-mud phosphorus slurry in digester II is through circulating line
IV is delivered in the spray piping on II top of spray column, and ground phosphate rock-mud phosphorus slurry enters II bottom of spray column through spray nozzle spray
Portion, ground phosphate rock-mud phosphorus slurry fractions of II bottom of spray column, which enter to stir in digester II through circulating line III, to be cured, spray column
The remaining ground phosphate rock in II bottom-mud phosphorus slurry is delivered to bottom in spray column I through slurries pipeline I；
(2) ground phosphate rock of I bottom of spray column-mud phosphorus slurry is delivered to stir in digester I through circulating line I and cure, digester I
Ground phosphate rock-mud phosphorus slurry be transported in the spray piping on I top of spray column through the circulating pump I on circulating line II, by flue gas
It is passed into spray column I by air blower and obtains flue gas A and slurry A, slurry A with red mud slurries progress gas-liquid counter current contact treatment
It is delivered to digester I through circulating line I, ground phosphate rock-mud phosphorus slurry of digester I is transported through the circulating pump I on circulating line II
Ground phosphate rock-mud phosphorus slurry is substituted into the spray piping on I top of spray column；Flue gas A is delivered to spray column through smoke conveying duct I
In II；
(3) II top ground phosphate rock of spray column-mud phosphorus slurry is sprayed through spray nozzle and is obtained with flue gas A progress gas-liquid counter current contact treatment
To flue gas B and slurry B, slurry B enters in digester II through slurries pipeline I through circulating line III, the slurry B warp in digester II
Circulating pump II on circulating line IV is transported to substitution ground phosphate rock-mud phosphorus slurry, flue gas B in the spray piping on II top of spray column
It is delivered in spray column III through smoke conveying duct II；
(4) III top ground phosphate rock of spray column-mud phosphorus slurry is sprayed through spray nozzle and is obtained with flue gas B progress gas-liquid counter current contact treatment
To desulphurization denitration flue gas and slurry C, slurry C enters in digester III through circulating line V, and the slurry C in digester III is through recycling
Circulating pump III on pipeline VI is transported to substitution ground phosphate rock-mud phosphorus slurry, desulphurization denitration in the spray piping on III top of spray column
Flue gas emptying；
(5) when the pH value of slurry A in step (2) digester I is 5 ~ 5.5, the slurry A after circular treatment adds through slurries pipeline IV
Enter into slurries storage tank, the slurries in slurries storage tank are delivered to disk filter through the slurries pump on slurries pipeline V and carry out solid-liquid
Separation, filtrate enter in filtrate receiver through liquid conducting pipes I, and filtrate respectively enters through filtrate pump, three-way pipeline in filtrate receiver
Into ammonification slot and surge tank, the filtrate in ammonification slot is reacted with ammonium hydrogen carbonate to be 6.5 ~ 7 to the pH of liquid system and will react
Liquid system afterwards is entered in filter press through the filter pump on liquid conducting pipes II and is separated by solid-liquid separation, and liquid is nitric acid phosphorus
Ammonium salt solution, nitric acid ammonium phosphate solution enters in inspissator through liquid conducting pipes III to be concentrated into the mass percent of nitric acid phosphorus ammonium and contains
Amount is 92 ~ 95%, and the nitric acid ammonium phosphate solution after being concentrated in inspissator takes out crystallisation by cooling and obtains nitric acid phosphorus ammonium crystal；In inspissator
Vapor be delivered in steam exhaust cooler through gas transmission pipeline cooling, cooling water is delivered to condensation through liquid conducting pipes III
It is stored in water storage tank, the water liquid conveyance conduit IV in condensed water storage tank, which enters in surge tank, mixes tune with ground phosphate rock and mud phosphorus
Slurry.
5. according to claim 4 using ground phosphate rock and mud phosphorus to the method for flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer,
Be characterized in that: partial size is that -250 mesh account for 80% or more in ground phosphate rock.
6. according to claim 4 using ground phosphate rock and mud phosphorus to the method for flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer,
It is characterized in that: SO in ground phosphate rock and flue gas2Mass ratio be (90~100): 1；In mud phosphorus and flue gas the mass ratio of NO be (7 ~
8):1。
7. according to claim 4 using ground phosphate rock and mud phosphorus to the method for flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer,
Be characterized in that: the total mass fraction concentration of ground phosphate rock and mud phosphorus is 7 ~ 8% in ground phosphate rock-mud phosphorus slurry.
8. according to claim 4 using ground phosphate rock and mud phosphorus to the method for flue gas desulfurization and denitrification and by-product nitrophosphate fertilizer,
Be characterized in that: the curing time of slurry is 15 ~ 20min, spray column I, spray column in digester I, digester II and digester III
II and spray column III sprinkle density be 15 ~ 20m3/m2·h。
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