CN100402458C - Antiseptic acidproof heat-proof concrete and its uses - Google Patents
Antiseptic acidproof heat-proof concrete and its uses Download PDFInfo
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- CN100402458C CN100402458C CNB2005101103025A CN200510110302A CN100402458C CN 100402458 C CN100402458 C CN 100402458C CN B2005101103025 A CNB2005101103025 A CN B2005101103025A CN 200510110302 A CN200510110302 A CN 200510110302A CN 100402458 C CN100402458 C CN 100402458C
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- concrete
- chimney
- water glass
- corrosion
- acid
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- 239000004567 concrete Substances 0.000 title claims abstract description 78
- 230000002421 anti-septic effect Effects 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 104
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 57
- 239000010959 steel Substances 0.000 claims abstract description 57
- 239000002253 acid Substances 0.000 claims abstract description 39
- 239000000203 mixture Substances 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 28
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 55
- 238000005260 corrosion Methods 0.000 claims description 51
- 230000007797 corrosion Effects 0.000 claims description 46
- 235000019353 potassium silicate Nutrition 0.000 claims description 29
- 239000004115 Sodium Silicate Substances 0.000 claims description 26
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 26
- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 claims description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 238000002360 preparation method Methods 0.000 claims description 15
- 239000000779 smoke Substances 0.000 claims description 13
- 239000006004 Quartz sand Substances 0.000 claims description 10
- 239000010881 fly ash Substances 0.000 claims description 9
- 239000011734 sodium Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 8
- 239000011044 quartzite Substances 0.000 claims description 8
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 7
- 235000003599 food sweetener Nutrition 0.000 claims description 7
- 229910052708 sodium Inorganic materials 0.000 claims description 7
- 239000003765 sweetening agent Substances 0.000 claims description 7
- 239000003755 preservative agent Substances 0.000 claims description 6
- 230000002335 preservative effect Effects 0.000 claims description 6
- 230000003009 desulfurizing effect Effects 0.000 abstract description 2
- 206010022000 influenza Diseases 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- 239000003546 flue gas Substances 0.000 description 52
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 48
- 238000010276 construction Methods 0.000 description 39
- 238000006477 desulfuration reaction Methods 0.000 description 19
- 238000000034 method Methods 0.000 description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 13
- 230000023556 desulfurization Effects 0.000 description 13
- 238000007599 discharging Methods 0.000 description 11
- 239000011521 glass Substances 0.000 description 11
- 238000012423 maintenance Methods 0.000 description 11
- 238000005554 pickling Methods 0.000 description 11
- 238000012360 testing method Methods 0.000 description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 9
- 239000011449 brick Substances 0.000 description 9
- 238000005187 foaming Methods 0.000 description 9
- 239000010936 titanium Substances 0.000 description 9
- 229910052719 titanium Inorganic materials 0.000 description 9
- 230000003245 working effect Effects 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 7
- 235000012239 silicon dioxide Nutrition 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 239000004927 clay Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000009415 formwork Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 4
- 230000003487 anti-permeability effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000005357 flat glass Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 description 2
- 229940005991 chloric acid Drugs 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 229920006334 epoxy coating Polymers 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000003837 high-temperature calcination Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229940072033 potash Drugs 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 235000015320 potassium carbonate Nutrition 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000370738 Chlorion Species 0.000 description 1
- 241000628997 Flos Species 0.000 description 1
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002362 anti-crystal effect Effects 0.000 description 1
- COAPBYURHXLGMG-UHFFFAOYSA-N azane;1,3,5-triazine-2,4,6-triamine Chemical compound N.NC1=NC(N)=NC(N)=N1 COAPBYURHXLGMG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006757 chemical reactions by type Methods 0.000 description 1
- 230000001149 cognitive effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- RCJVRSBWZCNNQT-UHFFFAOYSA-N dichloridooxygen Chemical compound ClOCl RCJVRSBWZCNNQT-UHFFFAOYSA-N 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 125000005624 silicic acid group Chemical group 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229960001866 silicon dioxide Drugs 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chimneys And Flues (AREA)
Abstract
The invention provides a composition for preparing antiseptic acid-resistant and temperature-resistant concrete comprising 15.0-17.2 weight parts of cementing material, 20.3-23.0 weight parts of powders, and 58.1-62.3 weight parts of skeletal materials. The composition can be used for preservation of equipments, chimney flues and chimney steel inner cylinder in desulfurizing systems of thermal power plants.
Description
Technical field
The present invention relates to a kind of impregnating material and its production and application, relate to antiseptic acidproof heat-proof concrete and its production and application particularly.
Background technology
In industrial circle, for example sweetener, flue or chimney are interior and electrolyzer, acid-base groove, triwaste groove, flushed channel or acidproof terrace, all need to adopt anticorrosion cushioning material.
For example, adopt in the engineering of steel smoke evacuation tube, preservative coat is set, can effectively prevent the corrosion of flue gas steel cylinder in steel smoke evacuation tube inboard in the energy industry field.Mainly contain in the inboard preservative coat type that is provided with of steel smoke evacuation tube: C-276 corrosion-resistant nickel-based alloy plate, titanium plate, foaming acid-resistant glass brick, corrosion-resistant scale clay, acidproof paint, acidproof heat-proof lightweight heat-proof mould material etc.
C-276 corrosion-resistant nickel-based alloy plate is a kind of Ni-Cr-Mo alloy of tungstenic, and the content of its silicon, carbon is extremely low, under oxidation and reduced state, most of corrosive mediums is had excellent erosion resistance, outstanding anti-pitting attack, crevice corrosion and stress corrosion performance.The erosion rate of C-276 alloy in 10% sulfuric acid boiling testing liquid is 0.35mm/y, and the titanium plate is at 99 ℃ 20%H
2SO
4Erosion rate＞61.8mm/y in the testing liquid.Because C-276 rolling composite plate price is more expensive, 100,000 yuan of need per ton, domestic does not still have an example that is applied to the chimney steel inner cylinder, and application is more in developed country.
According to the corrosion resistant characteristic of titanium panel material, it is generally acknowledged that titanium plate alloy lining is not to be with the best flue gas anticorrosive material of reheater (GGH) Deuslfurizing system for sea water.Pertinent data shows, sulfuric acid under the boiling situation, even concentration only 0.5% sulfuric acid also the titanium plate is produced the intensive corrosion, from temperature and these two parameters of sulfuric acid, temperature is even more serious to the infection of titanium plate.Engineering is provided with the situation of reheater (GGH) lime-gypsum method wet desulfurization system, has been not suitable for adopting titanium plate scheme.
Foaming acid-resistant glass brick is used for the desulfurization chimney of electric plant by the exploitation of U.S. Bin Gaode company as corrosion resistant material.Foaming acid-resistant glass brick has dual performance corrosion-resistant and insulation, and original chimney lining and heat insulation layer structure are united two into one.Foaming acid-resistant glass brick directly is pasted on the inboard internal surface of steel smoke evacuation inner core by the jointing material of special use, and by jointing material to the slit jointing between plate glass, blocked the corrosion of flue gas to the chimney internal cylinder structure.Foaming acid-resistant glass brick is owing to price higher (every square metre about 2,000 yuan), and the example that is used for chimney is more abroad, and is domestic less.At present domestic existing part Building Materials Factory also begins to produce foaming acid-resistant glass brick and jointing material, and price is half of imported materials and items.But its quality and imported materials and items gap are bigger.
Corrosion-resistant scale clay have impervious good, difficulty of construction is little, easy repairing, physical failure is few and cost is moderate etc. advantage.Therefore, the scale clay is extensive use of in industries such as electric power, metallurgy and chemical industry, especially the flue gas desulphurization system device in the power system.But this material easily produces bubbling, layering, peel off and situation such as cracking, still do not have the example that uses in chimney of electric plant at present.The former preparation of certain power plant is used in the chimney steel inner cylinder, and the back on inspection, is found to peel off above 30% when moving less than 1 year because of on probation undesirable in the flat flue of molten steel.
The principal item of acidproof paint has MC type, the anticorrosion heat resisting coating of OM type, and the Durashieds that produces as the U.S. " knob section in good year " manufactory etc. is used for the protective system of chimney.Coating price is cheap, construction and maintenance are all very convenient, and shortcoming is that coating is thinner relatively, cracky, and work-ing life is shorter.Certain power plant place of establishing once was immersed in the Durashieds coating print of import in 40% sulphuric acid soln, waited corrosion phenomenon less than a week just occurring foaming.Therefore in engineering, should not adopt the coating series products.
Acidproof heat-proof lightweight heat-proof mould material is that this material is corrosion-resistant, heat-proof quality all reaches design requirements by the new chimney corrosion-proof lining material of Heilongjiang Province's electric power surveying and designing institute and the joint study exploitation of the prosperous indefinite form mould material of Hegang City richness company limited.But this material only is used for the monotubular formula reinforced concrete chimney of old-fashioned structure, replaces brick liner as impregnating material, unresolved maintenance and the safety problem of guaranteeing load larrying member, and common engineering is inapplicable.
The weak point of above-mentioned several chimney lining impregnating material is: what have costs an arm and a leg, and is not suitable for the particular case of engineering; Though the initial investment that has is less, work-ing life is shorter, and maintenance load is big.Therefore, this area presses for that exploitation acidproof heat-proof performance is good, intensity suitable, work-ing life is long, the less impregnating material of investment, can be used as the chimney lining impregnating material and uses.
Summary of the invention
The objective of the invention is to obtain the impregnating material that a kind of acidproof heat-proof performance is good, intensity suitable, grow work-ing life, investment is less, can be used as impregnating material such as chimney lining.
In a first aspect of the present invention, a kind of composition that is used to prepare antiseptic acidproof heat-proof concrete is provided, described concrete comprises the agglutinate of 15.0-17.2 weight part, the powder of 20.3-23.0 weight part, the aggregate of 58.1-62.3 weight part, described agglutinate comprises water glass material and solidifying agent, the modulus of wherein said water glass material is 2.4-3.0, and density is 1.38-1.42 * 10
3Kg/m
3, the ratio of weight and number of described water glass material, solidifying agent is 1: 0.14-0.17.
In the preference of the present invention, described water glass material is the sodium silicate material.
In the preference of the present invention, described concrete also comprises the 3-5wt% admixture of water glass material usage, and described admixture is a furfuryl alcohol.
In the preference of the present invention, the described solidifying agent in the composition is a Sodium Silicofluoride.
In the preference of the present invention, the described powder in the composition is 816 acid-resistant powders, the I of power plant level flyash or its combination.
In the preference of the present invention, comprise 57.0-60.0wt% coarse aggregate and 40.0-43.0wt% fine aggregate in the described aggregate in the composition, the particle diameter of described coarse aggregate is between 5-25mm, and the particle diameter of described fine aggregate is between 0.16-5.0mm.Preferably, wherein said coarse aggregate comprises quartzite, and described fine aggregate comprises quartz sand, and the median size of described quartzite is 6.0mm, and the median size of described quartz sand is 1.0mm.
Another aspect of the present invention provides a kind of chimney, comprise steel smoke evacuation tube, described steel smoke evacuation tube inboard is provided with preservative coat, described preservative coat is: a kind of composition that is used to prepare antiseptic acidproof heat-proof concrete, described concrete comprises the agglutinate of 15.0-17.2 weight part, the powder of 20.3-23.0 weight part, the aggregate of 58.1-62.3 weight part, described agglutinate comprises water glass material and solidifying agent, the modulus of wherein said water glass material is 2.4-3.0, and density is 1.38-1.42 * 10
3Kg/m
3, the ratio of weight and number of described water glass material, solidifying agent is 1: 0.14-0.17.
Another aspect of the present invention provides a kind of purposes of composition, and described composition is used for: (a) corrosion-resistant lining material of preparation sweetener, flue or chimney; Or (b) corrosion-resistant lining material of preparation electrolyzer, acid-base groove, triwaste groove, flushed channel or acidproof terrace.
Another aspect of the present invention provides a kind of purposes of mixture, described mixture is made of the agglutinate of 15.0-17.2 weight part, the powder of 20.3-23.0 weight part, the aggregate of 58.1-62.3 weight part, and described mixture is used for the corrosion-resistant lining material of (a) preparation electrolyzer, acid-base groove, triwaste groove, flushed channel or acidproof terrace; Or (b) preparation sweetener, flue or chimney corrosion-resistant lining material.
Embodiment
The inventor is through extensive and deep research, by improving preparation technology, obtained the antiseptic acidproof heat-proof concrete that sour resistance toheat is good, intensity suitable, grow work-ing life, investment is less, anticorrosion excellent especially when can and be surprised to find that it as the inside lining anti-corrosive material, so be particularly suitable as the corrosion-resistant lining material of equipment such as chimney.Finished the present invention on this basis.Selecting suitable sodium silicate material in the starting material is most important link, and the modulus of sodium silicate material and density are main factors, and the proportioning of raw material is the key of preparation acidproof heat-proof concrete of the present invention.
Agglutinate
The consumption of agglutinate is between the 15.0-17.2 weight part in the composition of the present invention.
Agglutinate of the present invention comprises that modulus is that 2.4-3.0, density are 1.38-1.42 * 10
3Kg/m
3Water glass material and solidifying agent, the ratio of weight and number of described water glass material, solidifying agent is 1: 0.14-0.17.Modulus is meant the ratio of silicon-dioxide and the molecule number of sodium oxide or potassium oxide in the water glass material.
The water glass material is the chemical reaction type gelling material of inanimate matter, and the principal reaction resultant is a silicic acid gel, and its structural group becomes siloxane bond, and this class material has the excellent acid resistance toheat.And have extensive, easy to use and low-cost characteristics of resource.
The water glass material can be selected commercially available potash water glass material or sodium silicate material for use.Preferably, select the sodium silicate material for use.The advantage of sodium silicate material is that turnout is big, and is cheap, and the concrete final setting time of pouring is shorter, is fit to use in the engineering.In addition, also can adopt the potash water glass material of acidproof heat-proof better performances.
The modulus of water glass material is at 2.4-3.0; Preferred 2.6-2.9.The density of water glass material is in 1.38-1.42 * 10
3Kg/m
3Between.
The sodium silicate material that acidproof heat-proof concrete preferred density of the present invention is higher, the concrete pore rate of its preparation is low, physical strength is high, permeability resistance good.When the sodium silicate material modulus is low, should select the sodium silicate material of higher density; When the sodium silicate material modulus is higher, can select more low-density sodium silicate material.
For example, the modulus of sodium silicate material is typically chosen in 2.4-3.0, when construction temperature is low, should adopt the higher sodium silicate material of modulus, when construction temperature is higher, should adopt the lower sodium silicate material of modulus.
More preferably, can add admixture and improve concrete degree of compactness.The admixture that adds comprises the admixture of this area routine, as NNO, many hydroxyls etherified melamine ammonium, furfuryl alcohol etc.Preferably, adopt furfuryl alcohol as main admixture.For example, big, impervious poor, the not corrosion of anti-crystal salt of common sodium silicate pore fluid of concrete, thereby also be not suitable in the high engineering of life requirement.Have only the concrete degree of compactness of the sodium silicate of raising, could improve its anti-permeability performance, reduce the corrosion of crystal salt, increase work-ing life.Concrete density behind the admixture furfuryl alcohol improves greatly, makes it have good acid-resistant stability.Furfuryl alcohol can further form insoluble infusible body structure under the acid solution effect, have the ability of containment acid accumulator penetration.Therefore corrosion has anti-corrosion capability preferably to this concrete to crystal salt.Have data to show: ortho-water glass armored concrete partly is immersed in 20%H
2SO
4In, the crack just appearred in 3 months, and sulphate crystal appears in its surface of exposing, and is loose and burst apart; And closely knit water glass armored concrete is under similarity condition, soaks both to occur also not having a bit sign of crystalline fracture along the muscle crack in 14 years, and this has just guaranteed the reliability that arrangement of reinforcement compact-type sodium silicate concrete uses in acidic medium.
The consumption of admixture is the 3-5wt% of sodium silicate material usage.
The solidifying agent that uses simultaneously with agglutinate is a Sodium Silicofluoride.Sodium Silicofluoride is to use wide, effect solidifying agent preferably, and its molecular formula is Na
2SiF
6, outward appearance is white crystalline powder, little poison is arranged.The concrete solidification process of sodium silicate is actually the chemical reaction process of water glass and Sodium Silicofluoride, and chemical equation is as follows:
2Na
2O·nSiO
2+Na
2SiF
6+2(n+1)H
2O→6NaF+(2n+1)Si(OH)
4
Generate a large amount of silicic acid gel (Si (OH) in the reaction process
4), this silicic acid gel with colloidal property is bonded to an integral body with acid-resistant powder, aggregate, and dehydrating condensation formation has the three dimensional structure of siloxane bond gradually, causes concrete curing.
The ratio of weight and number of water glass material, solidifying agent is 1: 0.14-0.17.Preferably, the ratio of weight and number of water glass material, solidifying agent is 1: 0.15-0.16.
Powder
The consumption of powder is between the 20.3-23.0 weight part in the composition of the present invention, preferred 21.0-22.2 weight part.
Concrete powder can be selected this area powder glass-cermic powder commonly used, quartz powder, 816 powder etc. for use.I level flyash or its combination that preferred 816 acid-resistant powders, power plant produce.According to trial effect, the I level flyash that 816 acid-resistant powders and power plant produce has good acidproof heat-proof performance, is the preferred powder of forming acidproof heat-proof concrete.
816 acid-resistant powders (for example, can available from Shanghai Wei Jiasi special anticorrosive Materials Co., Ltd) are through 1200 ℃～1300 ℃ high-temperature calcinations, levigate forming by primary mineral aggregate.Primary mineral aggregate is a rhyolite-porphyry, and major ingredient is quartzy, is fine lepidiod mica basic unit on every side, after high-temperature calcination, rhyolite-porphyry is except that original quartz, and the mineral of its mica group have been transformed into the glassiness, has formed the comparatively fine and close microgranular quartz of new structure.
Flyash is selected from the I level flyash that boiler of power plant burning back produces, and its major ingredient has glass microballon.Glass microballon has the good acid resistance energy, and the profile rounding is smooth, and granularity is very little, and median size is 11.57 μ m.In concrete, can play the lubricated and filling space effect of ball, thereby improve concrete grain composition, increase flowability and degree of compactness, improve concrete anti-permeability performance.
Aggregate
The consumption of the aggregate in the composition of the present invention is between the 58.1-62.3 weight part.
Aggregate of the present invention comprises coarse aggregate and fine aggregate.Comprise 57.0-60.0wt% coarse aggregate and 40.0-43.0wt% fine aggregate in the described aggregate.
The particle diameter of coarse aggregate between 5-25mm, preferably, between 5-10mm.The particle diameter of fine aggregate between 0.16-5.0mm, preferably, between 1.0-2.0mm.This area coarse aggregate commonly used comprises quartzite, granite, andesite etc.The fine aggregate that this area is commonly used comprises quartz sand, natural river sand etc.
In preference of the present invention, the acid fastness of coarse aggregate is not less than 95wt%, and the pickling stability is qualified, and water ratio is not more than 0.5%, and water-intake rate is not more than 1.5%, and silt content is 0.The acid fastness of fine aggregate is not less than 95%, and the pickling stability is qualified, and water ratio is not more than 0.5%, and silt content is 0.
Preferably, the present invention with quartzite and quartz sand respectively as thick, the fine aggregate of acidproof heat-proof concrete.
Raw-material proportioning
Concrete of the present invention comprises the agglutinate of 15.0-17.2 weight part, the powder of 20.3-23.0% weight part, the aggregate of 58.1-62.3 weight part.Preferably, described agglutinate comprises sodium silicate material and the admixture that accounts for sodium silicate material weight 3-5wt%.Comprise 57.0-60.0% coarse aggregate and 40.0-43.0% fine aggregate in the described aggregate.
For example, when 20 ℃ of temperature, humidity≤70%, ventilation condition, when construction equipment is good, the quality mixture ratio of acidproof heat-proof concrete of the present invention is as follows:
Modulus is 2.4-2.8; Density is 1.38-1.40 * 10
3Kg/m
3Sodium silicate material 0.588
Sodium Silicofluoride 0.092
816 acid-resistant powders 0.726
Furfuryl alcohol (reaching chemical textile company limited earlier) 0.088 available from Wuxi City
I level flyash 0.182
Quartz sand (particle diameter 1.0-1.6mm) 1.057
Quartzite (particle diameter 5.0-10.0mm) 1.467
Situations such as the environment in the proportioning of acidproof heat-proof concrete of the present invention and when construction, temperature, humidity, facility are relevant, need do suitable adjustment by practical situation during construction.
The Concrete Construction operation
Steel cylinder inwall rust cleaning → embedded part welding → brushing epoxy coating → spread quartz sand → assembling reinforcement → formwork erection → concrete casting → maintenance → pickling.
Below in conjunction with specific embodiment, further illustrate the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.The experimental technique of unreceipted actual conditions in the following example, usually according to normal condition, or the condition of advising according to manufacturer.Ratio and per-cent are based on weight, unless stated otherwise.
The preparation of embodiment 1 concrete composition
When 20 ℃ of temperature, humidity≤70%, ventilation condition, when construction equipment is good, the quality mixture ratio of acidproof heat-proof concrete of the present invention is as follows:
Modulus is 2.4-2.8; Density is 1.38-1.40 * 10
3Kg/m
3Sodium silicate material 0.588
Sodium Silicofluoride 0.092
816 acid-resistant powders 0.726
Furfuryl alcohol (reaching chemical textile company limited earlier) 0.088 available from Wuxi City
I level flyash 0.182
Quartz sand 1.057
Quartzite 1.467
After stirring, perfusion obtains acidproof heat-proof concrete on request.
Embodiment 2 is lined with the manufacturing of the chimney of antiseptic acidproof heat-proof concrete
The construction of equipment, flue, chimney etc. difference to some extent after the flue gas desulfurization, wherein the construction of chimney is complicated, and existing is the constructional method that example illustrates acidproof heat-proof concrete of the present invention with high 240 meters steel inner cylinders.
The construction master operation of acidproof heat-proof concrete is as follows:
Steel cylinder inwall rust cleaning → embedded part welding → brushing epoxy coating → spread quartz sand → assembling reinforcement → formwork erection → concrete casting → maintenance → pickling.
For finishing these construction contents, must set up a jack-up earlier and hang steelframe, mobile operation platform ready to accept a higher or a lower post is installed and transports the workmen and the cage of construction material and derrick.
Main construction course is as follows:
1, preparation of construction: the making of operation platform, cage, lifting steel frame, Sheet Steel Form and support
2, the lifting facility is installed: bottom windlass, top steel frame, operation platform and cage are installed
3, dowel welding, barrel rust cleaning, swabbing, the son that sands, the net of wire-tiing
4, steel inner cylinder inwall formwork, placing concrete circulation construction are up to the steel cylinder top
5, acid treatment is carried out on steel inner cylinder internal-wall concrete surface
6, remove facilities such as operation platform, cage, top steel frame, bottom windlass, in the chimney outside lifting derrick and stair are installed, install in the steel funnel steel funnel by steel cylinder unit in charge of construction simultaneously and weld dowel, rust cleaning, swabbing, the net of wire-tiing, a template, placing concrete, form removal, acid treatment etc.
7, remove lifting derrick and stair.
Steel inner cylinder inner wall anti-corrosive construction technical schemes is as follows:
By adorning two windlasss, a hoisting capacity is 5000kg in chimney bottom, drives operation platform, and wirerope diameter is 24mm; Another elevator can be 3000kg, drives cage, and wirerope diameter is 16mm.Operation platform is used for steel inner cylinder inner wall anti-corrosive construction, cage be used for construction material and personnel about.Windlass adopts electronic single cylinder type, and every windlass is linked to each other with operation platform or cage by pulley by 1 wireline.The wireline that is 13mm with four diameters simultaneously at (90 ° at interval) around the operation platform is fixed on the earth anchor of top steel structure frame and bottom, prevents the swing of operation platform.And the machine that climbs respectively is installed on wireline, and control lifting simultaneously with windlass, guarantee that workmen's safety and platform are steady.These four wireline are simultaneously as the insurance steel cable of operation platform.
Operation platform
Work such as operation platform is used for welding, rust cleaning, swabbing, wire-ties, mounting template, concrete perfusion.Operation platform is for being circular layout outside radius 2700mm, inside radius 1150mm, berm width 1550mm.The operation platform plate is held on No. 8 channel-section steels, and No. 8 channel-section steels are formed 4 gallows frames by 8 suspension rods and linked to each other with pulley and windlass with wireline, control moving up and down of operation platform by windlass.The operation platform side is provided with the high protective fence of 1100mm, and local discharging and personnel's turnover place are provided with movable railing.
The operation platform bottom can be provided with assistance platform, and assistance platform is used to install and remove template.Being provided with of assistance platform is beneficial to accelerating construction progress, but increase the weight of operation platform and the complicacy of construction,, think the arrangement and method for construction that can not adopt assistance platform in this project construction through many-side research, only utilize moving up and down of operation platform, finish the construction of pouring acidproof heat-proof concrete.
Cage
Cage is installed at the middle part of operation platform, cage diameter 1900mm, height 2500mm, in establish one of 0.2 cubic meter of concrete hopper.To operation platform, cage links to each other with pulley and windlass by the wireline at top required material, the instrument of workmen and construction by the cage carriage vertically, by moving up and down of windlass control cage.The high protective fence of 1100mm all is set around the cage, and local loading and unloading material is provided with movable railing with personnel's turnover place.The extreme higher position that cage rises is equal with operation platform, is controlled by limit switch.
The chimney top lifting installation of steel structure frame
Utilize pulley the wireline of d13 to be removed to 226m chimney top platform by the workmen from chimney steel platform stair.
Pulley is fixed on 229m Steel Concrete urceolus top outer, is connected with the ground windlass, the chimney top is worked materials such as the barre steel pipe of reusing, wireline and hang the 226m platform with the d13 wireline.
On the 226m platform of chimney top, utilize the steel inner cylinder step ladder fixedly gin pole (hoisting capacity is 500kg, and wirerope diameter is 13mm) service tools such as chimney top steel structure frame rod member, welding machine are winched on the top platform respectively.
On the 226m platform, the lifting steel structure frame is installed, frame column adopts I25a, and top cross-bar adopts I36a, all the other beams to adopt I25a.Steel all is set in each plane supports, guarantee stability of structure.
The construction of liner acidproof heat-proof concrete
Steel inner cylinder liner acidproof heat-proof concrete adopts Sheet Steel Form, template height 1000mm, width 400mm.Every template is supported by d121x4 annular steel pipe, carries out spacing by bolt between template and the steel pipe.Each supports with two annular steel pipes during pouring one, two, three, four moulds, before watering the 5th mould, removes the template and the annular steel pipe of first mould, and install the position that moves to the 4th mould.The pouring of every layer concrete highly is 200mm, circulation so repeatedly, and the layering continuous pouring is until finishing.
The step of placing concrete is:
1, stirring finished, feeds 8 minutes
2, cage promotes 20 minutes
3, discharging is 8 minutes
4, cage descended 20 minutes
5, go into mould, vibrated 20 minutes
6, mounting template is 60 minutes
Annotate: 1) rising or falling speed of windlass cage is pressed calculating in 12m/ minute
2) presetting period of acidproof heat-proof concrete is 2 hours
3) the every layer height 200mm of concrete casting, volume 0.19m
3, about 500kg
It is intact to discharging to feed from stirring, and cage restarts charging, needs 56 minutes altogether; Pouring finishes, mounting template needs 88 minutes altogether.Calculate all less than 2 hours concrete presetting periods by this.Pouring 1000mm height concrete took time 5 hours 12 minutes, watered three template times above 12 hours.
The processing of construction joint
The steel inner cylinder inner lining concrete adopts the construction of layering continuous pouring, and top one deck was finished before the initial set of bottom during stratified watering.Surpass the presetting period if any unforeseen circumstances, then should after next layer concrete solidifies, press the method for construction joint and handle.Promptly i.e. cutter hair behind concrete initial set before the pouring is being cleaned out this face for the second time, and scumbling one deck sodium silicate clay continues pouring after dried slightly again.
Concrete in the 3 meters scopes in steel inner cylinder top utilizes pulley and manpower that concrete is risen on the chain-wales because the hoisting bracket height changes into by build chain-wales on operation platform, carries out formwork erection and placing concrete again.
The construction of steel inner cylinder corrosion-proof lining needs and steel cylinder construction and installation unit close fit, requires in the construction that steel inner cylinder bottom steel funnel part need treat that top barrel lining processing is finished, operation platform and cage could install after removing.During the construction of steel funnel liner, will outside floss hole, set up the lifting derrick, the carriage vertically concrete.Adopt the wooden model placing concrete in the funnel.
The dismounting of cage, operation platform, lifting steel frame is undertaken by the principle of " how to install, how to remove ".Cage and operation platform drop to chimney bottom to be removed, and the dismounting personnel of lifting steel frame must fasten safety rope, stem member cut little after, hang ground in the reinforced concrete chimney outside from top to down with barre.
Embodiment 3
Performance test
Press the method described in the DL/T901--2004 " fuel-burning power plant chimney (flue) inside lining anti-corrosive material ", volume density, initial set and final setting time, ultimate compression strength, acid resistance, thermotolerance, water tolerance and the anti-permeability performance of test acidproof heat-proof concrete.
To the test of above-mentioned performance, topmost acid resistance, test process is summarized as follows:
Carry out acid proof mensuration appearance change (pickling stability) and two aspects of Strength Changes ratio after the sample pickling.
To be divided into three groups, three every group with batch sample of preparation.Write down every group of each piece apparent condition.
A) appearance change (pickling stability).Sample is divided into three groups, does contrast benchmark, second group of full pickling, the 3rd group of half pickling for first group.Second group of sample put into 40%H under the normal temperature
2SO
4Soaked 30 days in the solution.The 3rd group of sample soaked in acid three days, take out and placed air three days,------hocketed in immersion again.After test is finished, observe and situations such as the burn into of record sample outward appearance peels off, crackle, expansion and local bubbling.
B) Strength Changes ratio.Sample is taken out from acid solution, with flushing with clean water for several times, dries again, and through 110 ℃ ± 5 ℃ oven dry in 24 hours, be cooled to normal temperature after, press the ultimate compression strength of YB/T5201 test specimens, calculate then and first group Strength Changes ratio.
Technical requirements and test-results contrast see the following form 1.
Table 1: technical requirements and test-results contrast
In the table:
f
o--the normal temperature ultimate compression strength of sample after 110 ℃ of oven dry
f
s--the normal temperature ultimate compression strength after the sample pickling
f
r--the normal temperature ultimate compression strength after the sample heating
f
Sh--the normal temperature ultimate compression strength after the sample immersion
Discuss
It is the country of main energy sources structure with the fire coal that China is one, and the dust in the coal-fired flue-gas, oxide compound, sulfide, oxychloride etc. are atmospheric primary pollution source.Wherein sulfurous gas has caused pollution condition such as acid rain.Therefore, the control to sulfurous gas is imperative.At present, flue gas desulfurization in the coal fired thermal power plant both at home and abroad is the major measure of control sulfur dioxide emissions.Wherein the wet method limestone washing method is that various countries, the world today use at most and the most sophisticated technology, and State Power Corporation is defined as heat-engine plant desulfurized leading technology with wet method limestone desulfurization technology.But the flue gas desulfurization treatment technology of China still is in the starting stage, and the anti-corrosion measure of desulfurization after-funnel is not had unified regulation, and each designing unit is bigger to this Cognitive Dissonance, and the anti-corrosion measure of chimney also is varied, lacks actual use experience.
The main flow process of wet desulfurizing process is that the flue gas of boiler enters flue gas desulphurization system from the flue interface of induced draft fan outlet side.Before entering desulfuration absorbing tower, flue gas boosts through booster fan, then by flue gas-flue gas heater (GGH), the heat of flue gas is transferred to the flue gas of absorption tower outlet, the absorption tower entrance flue gas temperature is reduced, help the absorption tower safe operation, the cleaning flue gases of absorption tower outlet simultaneously is then by the GGH heat temperature raising, and flue-gas temperature raises, and helps the Flue Gas Diffusion discharging., can make chimney outlet reach better condition of divergence and avoid flue gas to form white mist generally about 80 ℃ through flue-gas temperature after the GGH heater heats.The booster fan of establishing before the GGH, in order to overcome the resistance of desulphurization system, the cleaning flue gases after the heating enters chimney by the force feed of booster fan.
Flue gas is through after the desulfurization, though the content of sulfur in smoke significantly reduce,, the method for washing is to removing a spot of sulphur trioxide effect and bad in the flue gas.Because through wet desulphurization, smoke moisture increases, temperature reduces, flue gas after remaining sulphur trioxide dissolves in the flue gas, forms the very strong dilute sulfuric acid solution of corrodibility very easily in the inwall dewfall of chimney.Find that by condition survey the flue gas in the desulfuration chimney has following characteristics to desulfuration chimney in service:
1) water content height in the flue gas, smoke moisture is very big;
2) flue-gas temperature is low, the flue-gas temperature after the desulfurization generally between 40～50 ℃, after the GGH warmer heats up generally about 80 ℃;
3) contain acidic oxide in the flue gas, the acid dew-point temperature of flue gas is reduced;
4) concentration of the acid solution in the flue gas is low, and perviousness is stronger, and chimney structure is had very strong corrodibility;
5) chlorion in the flue gas is met water vapour and is formed chloric acid, and its chemical combination temperature is about 60 ℃, when being lower than the chloric acid dew-point temperature, will produce serious corrosion.
Hinder for some reason and during off-the-line, flue gas can not enter desulfurizer, and enters chimney row to atmosphere by the bypass flue at boiler startup process or desulfurizer.Because the These characteristics of flue gas in the desulfuration chimney should be noted following influence when chimney designs:
1) smoke moisture is big, and the corrosive medium that contains is under the dual function of flue gas pressures and humidity, and the material internal of chimney inside structure density difference is subject to corrosion very much, influences structure durability.
2) the lower concentration dilute sulfuric acid solution is stronger than the acid liquid corrosion of high density.
3) temperature of acid solution is in the time of 40-80 ℃, and is strong especially to the corrodibility of structured material.With steel is example, and the etch ratio in the time of 40-80 ℃ exceeds about 3-8 doubly when other temperature.
Hence one can see that, and the chimney of the common not desulfurization of the chimney brake specific exhaust emission flue gas of discharging desulfurization flue gas is much higher to the protection against corrosion design requirements.So when the design desulfuration chimney, the anticorrosive measure of inner wall of stack should further be strengthened.
In addition, because when chimney moved, flue gas might not enter desulfurizer, and enters chimney by the bypass flue.At this moment, flue-gas temperature is higher, generally about 130 ℃, so during the design chimney, must consider that also operation is to the influence of chimney under this temperature operating mode.
At present, chimney of electric plant mainly moves under following three kinds of operating modes:
1) discharging is without the flue gas of desulfurization, and the flue-gas temperature that enters chimney is about 130 ℃.With this understanding, inner wall of stack is in drying regime, and flue gas is quite slight to the corrosion situation of inner wall of stack.
2) flue gas of discharging after wet desulphurization, and flue gas is through the heating of GGH system, and the flue-gas temperature that enters chimney is about 80 ℃, and inner wall of stack has slight dewfall, the inboard dust stratification of the inner core that causes discharging fume.According to the difference of conditions such as discharging smoke components, the dewfall situation will change to some extent.
3) flue gas of discharging after wet desulphurization, the flue-gas temperature that enters chimney is about 40 ℃, and inner wall of stack has serious dewfall, and the acid solution trickling of dewfall is arranged along barrel.
In addition, should consider also during the chimney design that generally this temperature is about 300 ℃ in the temperature of boiler breakdowns state discharging flue gas.
Therefore the selection of steel inner cylinder inner lining material must be considered the factor of following four aspects:
1) technical feasibility need be full of the requirement for anticorrosion under the complicated chemical environment;
2) economical rationality, lower building cost, the one-time investment expense is low;
3) execution conditions are good, and quality control is convenient, short construction period;
4) operation and maintenance cost is low, convenient maintenance.
Acidproof heat-proof concrete of the present invention be at the fuel-burning power plant after flue gas desulfurization, because flue-gas temperature reduces, sweetener, flue, chimney are produced the operating mode than deep-etching, need aspect corrosion-resistant lining material, select that a kind of anti-flue gas corrosion performance is good, the lower again corrosion-resistant lining material of investment is developed.Corrosion resistant performance is good, price is lower, the advantage of easy construction, is to be used for sweetener, flue, the proper a kind of corrosion-resistant lining material in chimney anticorrosion aspect.
Acidproof heat-proof concrete of the present invention is a compact-type sodium silicate class impregnating material, compact-type water glass class material has utmost point excellent acid performance, have data to show: it shows that to the anti-corrosion capability of acid test specimen is after soaking, intensity is not to descend but rising, and with the prolongation of pickling time, intensity is the trend of growth.Also have very high thermotolerance simultaneously, use temperature can reach 300 ℃.And acidproof heat-proof concrete building cost of the present invention is lower, only is the sixth of titanium plate liner; / 4th of an import plate glass; / 2nd of a homemade plate glass.
Acidproof heat-proof concrete of the present invention and other corrosion-resistant lining material be compared as follows table 2:
The comparison of table 2 acidproof heat-proof concrete of the present invention and other corrosion-resistant lining material
| Anti-corrosion measure | Technical feature | Cost (unit/m 2) | Remarks |
| Acidproof heat-proof concrete of the present invention | Corrosion resistant performance is better, and construction is complicated | 500 | |
| Titanium plate liner | Corrosion resistant performance good (as sea water desulfuration) during low temperature, corrosion resistant performance reduced when temperature raise | 2500 | The welding requirements height |
| Import foaming acid-resistant glass brick | Corrosion resistant performance is better, easy construction | 2000 | Light weight, but double as thermal insulation layer |
| Homemade foaming acid-resistant glass brick | Corrosion resistant performance is better, but that the adhesives quality need change is urgent | 1000 | Light weight, but double as thermal insulation layer |
| Corrosion-resistant scale clay | Corrosion resistant performance is better, and it is more convenient to construct | 800 | Work-ing life is shorter, and maintenance load is big |
| Acidproof paint | Acid resistance is relatively poor, and it is easy to maintenance to construct | 400 | Work-ing life is shorter, and maintenance load is big |
| Acidproof heat-proof lightweight heat-proof mould material | Acid resistance is general, and construction is complicated | 1000 | Maintenance load is big |
In addition, concrete of the present invention is by different material mixture ratio process repeated tests, after obtaining PRELIMINARY RESULTS and meeting power industry standard " fuel-burning power plant chimney (flue) inside lining anti-corrosive material " technical requirements (DL/901--2004), trust has the Guo Electric Power Construction Research Institute of testing department of qualification to test by certain proportioning, and its test-results meets the technical requirements of power industry standard fully.
In sum, acidproof heat-proof concrete of the present invention is to be used for a kind of corrosion-resistant lining material of the anticorrosion aspect of steel inner cylinder obvious results.This material not only can be used for equipment, flue, chimney steel inner cylinder anticorrosion of fuel-burning power plant desulphurization system, also can be used for controlling the projects such as electrolyzer, acid-base groove, triwaste groove, flushed channel and acidproof terrace of industries such as gold, chemical industry, plating.
All quote in this application as a reference at all documents that the present invention mentions, just quoted as a reference separately as each piece document.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after having read above-mentioned teachings of the present invention, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Claims (8)
1. composition that is used to prepare antiseptic acidproof heat-proof concrete, it is characterized in that, described concrete comprises the agglutinate of 15.0-17.2 weight part, the powder of 20.3-23.0 weight part, the aggregate of 58.1-62.3 weight part, described agglutinate comprises water glass material and solidifying agent, and described water glass material is the sodium silicate material;
Described powder is 816 acid-resistant powders, the I of power plant level flyash or its combination;
The modulus of wherein said water glass material is 2.4-3.0, and density is 1.38-1.42 * 10
3Kg/m
3, the ratio of weight and number of described water glass material, solidifying agent is 1: 0.14-0.17.
2. composition as claimed in claim 1 is characterized in that, described concrete also comprises the 3-5wt% admixture of water glass material usage, and described admixture is a furfuryl alcohol.
3. composition as claimed in claim 1 is characterized in that, described solidifying agent is a Sodium Silicofluoride.
4. composition as claimed in claim 1 is characterized in that, comprises 57.0-60.0wt% coarse aggregate and 40.0-43.0wt% fine aggregate in the described aggregate, and the particle diameter of described coarse aggregate is between 5-25mm, and the particle diameter of described fine aggregate is between 0.16-5.0mm.
5. composition as claimed in claim 4 is characterized in that wherein said coarse aggregate comprises quartzite, and described fine aggregate comprises quartz sand, and the median size of described quartzite is 6.0mm, and the median size of described quartz sand is 1.0mm.
6. a chimney comprises steel smoke evacuation tube, and described steel smoke evacuation tube inboard is provided with preservative coat, it is characterized in that described preservative coat is a concrete as claimed in claim 1.
7. the purposes of composition as claimed in claim 1 is characterized in that, described composition is used for: (a) corrosion-resistant lining material of preparation sweetener, flue or chimney; Or (b) corrosion-resistant lining material of preparation electrolyzer, acid-base groove, triwaste groove, flushed channel or acidproof terrace.
8. the purposes of a mixture, described mixture is made of the agglutinate of 15.0-17.2 weight part, the powder of 20.3-23.0 weight part, the aggregate of 58.1-62.3 weight part,
Described agglutinate comprises water glass material and solidifying agent, and the modulus of wherein said water glass material is 2.4-3.0, and density is 1.38-1.42 * 10
3Kg/m
3, the ratio of weight and number of described water glass material, solidifying agent is 1: 0.14-0.17, and described water glass material is the sodium silicate material;
Described powder is 816 acid-resistant powders, the I of power plant level flyash or its combination;
It is characterized in that described mixture is used for the corrosion-resistant lining material of (a) preparation electrolyzer, acid-base groove, triwaste groove, flushed channel or acidproof terrace; Or (b) preparation sweetener, flue or chimney corrosion-resistant lining material.
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| CN102839846A (en) * | 2012-09-14 | 2012-12-26 | 苏州云白环境设备制造有限公司 | Filled heat preservation chimney |
| CN105218060A (en) * | 2015-08-21 | 2016-01-06 | 北京联合荣大建材有限公司 | A kind of self-styled closed form acid resisting material and preparation method |
| CN105541263A (en) * | 2015-12-25 | 2016-05-04 | 邢台建工商品混凝土有限公司 | Anti-seepage acid-resisting concrete and preparation method thereof |
| CN106045357B (en) * | 2016-05-27 | 2018-03-20 | 江西维龙科技协同创新有限公司 | A kind of preparation method of the warm acidproof heat-proof clay material of width |
| CN107311536A (en) * | 2017-07-04 | 2017-11-03 | 叶长青 | A kind of resistant material for being used to build |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057449A (en) * | 1990-06-20 | 1992-01-01 | 云南会泽铅锌矿 | Dense water glass acid-proof concrete and preparation method |
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2005
- 2005-11-11 CN CNB2005101103025A patent/CN100402458C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057449A (en) * | 1990-06-20 | 1992-01-01 | 云南会泽铅锌矿 | Dense water glass acid-proof concrete and preparation method |
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| CN1962527A (en) | 2007-05-16 |
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