CN113713607A - Granular ICR (intensive Care reactor) denitration agent and preparation method thereof - Google Patents
Granular ICR (intensive Care reactor) denitration agent and preparation method thereof Download PDFInfo
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- CN113713607A CN113713607A CN202110979098.XA CN202110979098A CN113713607A CN 113713607 A CN113713607 A CN 113713607A CN 202110979098 A CN202110979098 A CN 202110979098A CN 113713607 A CN113713607 A CN 113713607A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 58
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 46
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 24
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 23
- 239000003054 catalyst Substances 0.000 claims abstract description 21
- 235000017557 sodium bicarbonate Nutrition 0.000 claims abstract description 16
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims abstract description 16
- 239000000853 adhesive Substances 0.000 claims abstract description 15
- 230000001070 adhesive effect Effects 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000004202 carbamide Substances 0.000 claims description 7
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 7
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 5
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 4
- 229910001308 Zinc ferrite Inorganic materials 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- WGEATSXPYVGFCC-UHFFFAOYSA-N zinc ferrite Chemical compound O=[Zn].O=[Fe]O[Fe]=O WGEATSXPYVGFCC-UHFFFAOYSA-N 0.000 claims description 4
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 3
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims description 3
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims description 3
- 239000001099 ammonium carbonate Substances 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims 1
- 235000019832 sodium triphosphate Nutrition 0.000 claims 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 6
- 239000007787 solid Substances 0.000 description 9
- 239000003546 flue gas Substances 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000010791 domestic waste Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000004056 waste incineration Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- -1 flue gas nitrogen oxides Chemical class 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000013638 trimer Substances 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- LUYGICHXYUCIFA-UHFFFAOYSA-H calcium;dimagnesium;hexaacetate Chemical compound [Mg+2].[Mg+2].[Ca+2].CC([O-])=O.CC([O-])=O.CC([O-])=O.CC([O-])=O.CC([O-])=O.CC([O-])=O LUYGICHXYUCIFA-UHFFFAOYSA-H 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- IXQWNVPHFNLUGD-UHFFFAOYSA-N iron titanium Chemical compound [Ti].[Fe] IXQWNVPHFNLUGD-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052615 phyllosilicate Inorganic materials 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 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
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
-
- 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
Abstract
The invention provides a granular ICR denitration agent and a preparation method thereof, wherein the granular ICR denitration agent comprises active ammonia, a catalyst, an adhesive and sodium bicarbonate; the denitration agent comprises 40-90% of active ammonia component, 5-30% of catalyst component, 1-30% of adhesive component and 5-15% of sodium bicarbonate component. The denitration agent disclosed by the invention has an excellent denitration effect, the SNCR denitration efficiency is generally 50-60%, and after ICR denitration is adopted, the denitration efficiency can be improved to 80-90%; the denitration agent has the advantages of low cost, simple production process, granular denitration agent, material conveying convenience and no blockage in the material conveying process.
Description
Technical Field
The invention relates to a technology in the field of environmental protection, provides a domestic garbage incineration ICR denitration process aiming at the problem that the control index of flue gas nitrogen oxides is increasingly strict in the existing domestic garbage incineration process, and discloses a granular ICR denitration agent component and a preparation method thereof, wherein the denitration agent comprises 40-90% of active ammonia component, 5-30% of catalyst component, 1-30% of adhesive component and 5-15% of sodium bicarbonate component
Background
With the progress of urbanization in China and the enlargement of urban scale, the annual average growth rate of urban domestic garbage in China is as high as 8-10%, and the growth rate of some cities is even as high as 15-20%. According to the data of the national statistical bureau, the clear volume of domestic garbage in 2019 in China reaches 2.4 hundred million tons, the domestic garbage incineration is widely applied in China as the main process for treating and disposing the domestic garbage, 3.67 million tons of domestic garbage are incinerated in 2019 all over the country, and the quantity of garbage incineration plants is 389 seats.
The household garbage incineration technology realizes the harmlessness, reduction and recycling of garbage, the garbage volume can be reduced by about 80%, the garbage ton generated energy can reach 500 ℃, but the flue gas generated by garbage incineration contains a large amount of NOx, acid gas and a small amount of dioxin, and a flue gas treatment system is required for treatment.
The conventional NOx removal technology comprises SNCR (selective non-catalytic reduction) and SCR (selective catalytic reduction), the SNCR technology is adopted, the investment cost is low, the application is wide, the NOx removal efficiency is low and is generally 50% -80%, and the NOx emission value can be controlled to be 120-180 mg/Nm3 by adopting single SNCR in a conventional garbage incineration plant. By adopting the SCR technology, the investment cost is higher, the running cost of the SCR adopted in the household garbage incineration plant is also higher, but the NOx removal efficiency is high, the effect is more stable, and the NOx emission value can be controlled to be 50-80 mg/Nm 3. At present, the SNCR process is mainly adopted for waste incineration, but with the improvement of environmental protection requirements, the state department releases ' three-year action plan of winning blue sky guard war ' (national issue [2018]22 '), then the Hainan province releases ' domestic waste incineration pollution control standard ' (DB 46/484-2019), the Henan province releases ' implementation scheme of preventing and treating air, water and soil pollution in 2020 years in Henan province ' (Yun environmental attack [2020] 7), the Fujian province releases ' domestic waste incineration nitric oxide emission standard ' (DB 35/1976-2021), the SNCR process alone cannot meet the new emission standard requirements, and the SCR process is adopted to solve the problems of high investment cost and limited site aiming at the built domestic waste landfill, and the process propulsion is difficult to implement.
The ICR denitration process adopts solid addition, solid denitration agent is added at the temperature of 850-1000 ℃, and the solid denitration agent and the SNCR process are combined to form a new denitration process package, so that the aim of further controlling NOx is fulfilled, and the ICR denitration process is low in investment cost, small in occupied area and suitable for upgrading and transforming of an established incineration plant.
The key point of the ICR denitration process is research and development of a solid denitration agent and denitration efficiency, and the patent CN202010712879.8 provides the solid denitration agent and a preparation method thereof, wherein the solid denitration agent comprises 80-95 parts of a reducing agent, 1-5 parts of activated carbon and 0.01-0.2 part of hydrogen storage metal by mass, and the hydrogen storage metal is one of titanium, magnesium, zirconium and iron-titanium alloy. CN202010571059.1 proposes a high molecular solid powder denitration agent for flue gas denitration and a preparation method thereof, wherein the high molecular solid powder denitration agent comprises the following raw materials by weight percent: 10-70% of organic amino active compound, 10-40% of inorganic active amino compound, 5-40% of inorganic mineral powder, 5-30% of active mineral powder and 1-10% of additive. The obtained denitrifier is in a powder state. CN202010513240.7 proposes a solid denitration agent, which comprises the following raw materials in parts by weight: 1-15 parts of ferric oxide, 2-6 parts of manganese dioxide, 40-60 parts of urea, 10-25 parts of calcium magnesium acetate, 1-10 parts of titanium oxide and 5-10 parts of kaolin, wherein the particle size of the denitration agent powder is 50-70 nm. CN202010279226.5 proposes a composite denitrifier, which is mainly prepared from talcum powder, phyllosilicate, ferric oxide, lanthanum oxide, barium oxide, urea, oxidant, organic binder, inorganic binder, carboxymethyl cellulose, surfactant, dispersant, polyhydric alcohol and other raw materials. Iron oxide, lanthanum oxide, barium oxide and urea are used as denitration active components.
The method provides different formulas and methods for the denitration agent, but has the following defects:
1) the raw material part of the equipment is too expensive or difficult to obtain, so that the production of the denitration agent cannot be scaled, or the production cost of the denitration agent is too high, and the application of the product is influenced;
2) the production process of the denitration agent is complex, the steps are multiple, and no special large-scale production is available, so that the yield of the denitration agent is limited.
3) The denitration agent is powdery, so that the denitration agent is easy to block in the using process and the conveying link; the denitration agent is a mixture of powder and particles, and has the problems of uneven conveying and serious equipment blockage in the conveying link.
Disclosure of Invention
The invention aims to provide a granular ICR (intensive Care reactor) denitration agent component which can effectively solve the problems of blockage, production and application, effectively improve the removal efficiency of NOx and realize the stable standard-reaching emission of nitrogen oxides under the requirement of a new standard and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a granular ICR denitration agent and a preparation method thereof are disclosed, and the granular ICR denitration agent is characterized by comprising a denitration agent, a catalyst, an adhesive and sodium bicarbonate, wherein the denitration agent comprises active ammonia, the catalyst, the adhesive and the sodium bicarbonate; the denitration agent comprises 40-90% of active ammonia component, 5-30% of catalyst component, 1-30% of adhesive component and 5-15% of sodium bicarbonate component.
Preferably, the active ammonia component is urea, ammonium bicarbonate or ammonia trimer.
Preferably, the catalyst component adopts titanium dioxide, vanadium pentoxide or zinc ferrite.
Preferably, the adhesive is polyurethane or polyacrylic resin.
The invention also provides a preparation method of the granular ICR denitration agent, which comprises the following steps: the method comprises the steps of selecting 40-90% of active ammonia components, 5-30% of catalysts, 1-30% of adhesives and 5-15% of sodium bicarbonate, and preparing the active ammonia components, the catalysts and the sodium bicarbonate into particles through a special denitration agent preparation system.
Preferably, the particle size of the denitration agent is 2-4 mm.
Preferably, the preparation temperature of the denitration agent is 850-1000 ℃.
Compared with the prior art, the invention has the technical effects that:
1) the denitration effect is excellent, the SNCR denitration efficiency is generally 50-60%, and after ICR denitration is adopted, the denitration efficiency can be improved to 80-90%;
2) the denitration agent has the advantages of low cost, simple production process, granular denitration agent, material conveying convenience and no blockage in the material conveying process.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The invention discloses a granular ICR denitration agent and a preparation method thereof. A particulate ICR denitrifier comprises active ammonia, a catalyst, a binder and sodium bicarbonate; the denitration agent comprises 40-90% of active ammonia component, 5-30% of catalyst component, 1-30% of adhesive component and 5-15% of sodium bicarbonate component.
Further, the active ammonia component adopts urea, ammonium bicarbonate or ammonia trimer.
Further, the catalyst component adopts titanium dioxide, vanadium pentoxide or zinc ferrite.
Further, the adhesive is polyurethane or polyacrylic resin.
The invention also provides a preparation method of the granular ICR denitration agent, which comprises the following steps: the method comprises the steps of selecting 40-90% of active ammonia components, 5-30% of catalysts, 1-30% of adhesives and 5-15% of sodium bicarbonate, and preparing the active ammonia components, the catalysts and the sodium bicarbonate into particles through a special denitration agent preparation system.
Further, the particle size of the denitration agent is 2-4 mm.
Further, the preparation temperature of the denitration agent is 850-1000 ℃.
The sodium bicarbonate component adopted by the invention is beneficial to removing acid gas in the flue gas and synchronously realizing the deacidification effect.
Examples
The preparation of the denitration agent adopts 84% of active ammonia, 5% of catalyst, 1% of adhesive and 10% of sodium bicarbonate.
Wherein the active ammonia is urea; the catalyst adopts titanium dioxide and zinc ferrite, and the proportion is 4: 1; the adhesive is polyurethane; the sodium bicarbonate is industrial sodium bicarbonate.
The components of the denitration agent are mixed and then prepared into particles by a special denitration agent preparation system, and the particle size of the denitration agent is 2-4 mm.
The denitration agent prepared by the invention is applied to a certain household garbage incineration plant, and the basic parameters of the incineration plant are as follows in the following table 1:
TABLE 1
| Serial number | Name (R) | Parameter(s) | Remarks for note |
| 1 | Grate type | Horizontal incinerator | |
| 2 | Throughput of treatment | 500d/t | |
| 3 | Number of boilers | 3 | |
| 4 | Amount of flue gas (design value) | 90260Nm3/h | Single table |
| 5 | Boiler inlet temperature | ＞850℃ | |
| 6 | Oxygen content of flue gas | 5-8％ | |
| 7 | Initial concentration of NOx | 400mg/Nm3 | Dry basis, 11% O2 |
| 8 | NOx emission after SNCR denitration means | ＜180mg/Nm3 | Dry basis, 11% O2 |
After the ICR denitration process is adopted, the operation is continued for 3 months, the dosage of the denitration agent is controlled within 0.8-1.2 kg/t of garbage, and from the operation data of Table 2, the ammonia escape is controlled within 8mg/Nm3, the NOx is controlled within 100mg/Nm3, and the removal rate of the NOx reaches 80-90%.
TABLE 2
It can be seen that the present invention compares with the prior art:
1) the denitration effect is excellent, the SNCR denitration efficiency is generally 50-60%, and after ICR denitration is adopted, the denitration efficiency can be improved to 80-90%;
2) the denitration agent has the advantages of low cost, simple production process, granular denitration agent, material conveying convenience and no blockage in the material conveying process.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The granular ICR denitration agent is characterized by comprising active ammonia, a catalyst, a binder and sodium bicarbonate; the denitration agent comprises 40-90% of active ammonia component, 5-30% of catalyst component, 1-30% of adhesive component and 5-15% of sodium bicarbonate component.
2. A particulate ICR denitrifier according to claim 1, wherein said active ammonia component is urea, ammonium bicarbonate or ammonium tripolyphosphate.
3. The particulate ICR denitrifier of claim 1, wherein said catalyst component is titanium dioxide, vanadium pentoxide or zinc ferrite.
4. The particulate ICR denitrifier of claim 1, wherein said binder is polyurethane or polyacrylic resin.
5. A preparation method of a granular ICR denitration agent is characterized by comprising the following steps:
the method comprises the steps of selecting 40-90% of active ammonia components, 5-30% of catalysts, 1-30% of adhesives and 5-15% of sodium bicarbonate, and preparing the active ammonia components, the catalysts and the sodium bicarbonate into particles through a special denitration agent preparation system.
6. The method of claim 5, wherein the particle size of the particulate ICR denitrifier is 2-4 mm.
7. The method for preparing the granular ICR denitration agent according to claim 5, wherein the temperature for preparing the denitration agent is 850-1000 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114307634A (en) * | 2022-01-05 | 2022-04-12 | 嘉兴沃特泰科环保科技股份有限公司 | Granular denitration agent and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06114267A (en) * | 1992-10-02 | 1994-04-26 | Meidensha Corp | Denitrating agent, production of denitrating agent, and denitrating method |
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