CN115044415A - Cleaning agent for titanium tetrachloride preheater coil pipe and preparation method and application thereof - Google Patents
Cleaning agent for titanium tetrachloride preheater coil pipe and preparation method and application thereof Download PDFInfo
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- CN115044415A CN115044415A CN202210695349.6A CN202210695349A CN115044415A CN 115044415 A CN115044415 A CN 115044415A CN 202210695349 A CN202210695349 A CN 202210695349A CN 115044415 A CN115044415 A CN 115044415A
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- titanium tetrachloride
- parts
- cleaning agent
- cleaning
- tetrachloride preheater
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- 239000012459 cleaning agent Substances 0.000 title claims abstract description 77
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000004140 cleaning Methods 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 24
- 239000004094 surface-active agent Substances 0.000 claims abstract description 17
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims abstract description 15
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 claims abstract description 14
- BRWIZMBXBAOCCF-UHFFFAOYSA-N hydrazinecarbothioamide Chemical compound NNC(N)=S BRWIZMBXBAOCCF-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229960001484 edetic acid Drugs 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 238000005406 washing Methods 0.000 claims description 11
- 238000011010 flushing procedure Methods 0.000 claims description 10
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 9
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 238000010926 purge Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 125000004122 cyclic group Chemical group 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- QJRVOJKLQNSNDB-UHFFFAOYSA-N 4-dodecan-3-ylbenzenesulfonic acid Chemical compound CCCCCCCCCC(CC)C1=CC=C(S(O)(=O)=O)C=C1 QJRVOJKLQNSNDB-UHFFFAOYSA-N 0.000 claims description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 2
- 235000021355 Stearic acid Nutrition 0.000 claims description 2
- WOWHHFRSBJGXCM-UHFFFAOYSA-M cetyltrimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCC[N+](C)(C)C WOWHHFRSBJGXCM-UHFFFAOYSA-M 0.000 claims description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 2
- 229910052756 noble gas Inorganic materials 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 2
- -1 polydimethylsiloxane Polymers 0.000 claims description 2
- 235000019333 sodium laurylsulphate Nutrition 0.000 claims description 2
- 239000008117 stearic acid Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052799 carbon Inorganic materials 0.000 abstract description 11
- 159000000007 calcium salts Chemical class 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 4
- 159000000003 magnesium salts Chemical class 0.000 abstract description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 16
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 239000000956 alloy Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- 230000008021 deposition Effects 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 150000002191 fatty alcohols Chemical class 0.000 description 4
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000004945 emulsification Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 229910003470 tongbaite Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 238000005202 decontamination Methods 0.000 description 2
- 230000003588 decontaminative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 150000002632 lipids Chemical class 0.000 description 2
- 239000011344 liquid material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052754 neon Inorganic materials 0.000 description 2
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- BIJOYKCOMBZXAE-UHFFFAOYSA-N chromium iron nickel Chemical compound [Cr].[Fe].[Ni] BIJOYKCOMBZXAE-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- QLOKAVKWGPPUCM-UHFFFAOYSA-N oxovanadium;dihydrochloride Chemical compound Cl.Cl.[V]=O QLOKAVKWGPPUCM-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000005049 silicon tetrachloride Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 235000010215 titanium dioxide Nutrition 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/02—Anionic compounds
- C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
- C11D1/14—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
- C11D1/146—Sulfuric acid esters
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/72—Ethers of polyoxyalkylene glycols
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/06—Phosphates, including polyphosphates
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/26—Organic compounds containing nitrogen
- C11D3/33—Amino carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/34—Organic compounds containing sulfur
- C11D3/349—Organic compounds containing sulfur additionally containing nitrogen atoms, e.g. nitro, nitroso, amino, imino, nitrilo, nitrile groups containing compounds or their derivatives or thio urea
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/36—Organic compounds containing phosphorus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
- F28G1/163—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris from internal surfaces of heat exchange conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G13/00—Appliances or processes not covered by groups F28G1/00 - F28G11/00; Combinations of appliances or processes covered by groups F28G1/00 - F28G11/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
-
- C11D2111/20—
Abstract
The invention relates to the technical field of cleaning agents, and particularly relates to a cleaning agent for a titanium tetrachloride preheater coil pipe, and a preparation method and application thereof. The cleaning agent for the titanium tetrachloride preheater coil is mainly prepared from the following components in parts by weight: 400-500 parts of water, 550-750 parts of phosphoric acid, 0.5-2 parts of surfactant, 0.8-3 parts of hydroxyethylidene diphosphonic acid, 0.4-1.5 parts of thiosemicarbazide and 0.2-0.5 part of ethylene diamine tetraacetic acid. The cleaning agent has a good cleaning effect, can effectively remove impurities such as carbon deposit, chloride, calcium salt and magnesium salt on the titanium tetrachloride preheater coil, and cannot corrode the titanium tetrachloride preheater coil.
Description
Technical Field
The invention relates to the technical field of cleaning agents, in particular to a cleaning agent for a titanium tetrachloride preheater coil pipe, a preparation method and application thereof; more particularly relates to a cleaning agent for titanium tetrachloride preheater coils, a preparation method of the cleaning agent for the titanium tetrachloride preheater coils and a cleaning method.
Background
The titanium tetrachloride preheater is a key device in the oxidation section of the chlorination process. In the process of producing titanium white by a chlorination process, due to the fact that the addition amount of mineral oil is too large, carbon deposition in a coil pipe of a titanium tetrachloride preheater is often caused, carbon and chromium elements in the coil pipe material can generate chromium carbide, and then the chromium carbide falls off, is regenerated and then falls off, so that the wall of the coil pipe is thinned in a reciprocating mode, and leakage is easy to occur.
At present, the conventional method for cleaning the titanium tetrachloride preheater coil is a high-pressure water jet cleaning technology, and the coil is washed by high-pressure water of more than 1000 bar. However, since the coiled pipe is bent and the number of layers is too large, the coiled pipe can be damaged if the pressure is too high by using high-pressure water; if the water pressure is too low, the kinetic energy brought by the water is insufficient, and the scaling of the bottom layer is not thoroughly cleaned.
Therefore, it is of great importance to provide a new cleaning agent and cleaning solution.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The first purpose of the invention is to provide a cleaning agent for a titanium tetrachloride preheater coil, which has a good cleaning effect, can effectively remove impurities such as carbon deposit, chloride, calcium salt and magnesium salt on the titanium tetrachloride preheater coil, and cannot corrode the titanium tetrachloride preheater coil.
The second purpose of the invention is to provide a preparation method of the cleaning agent for the titanium tetrachloride preheater coil, which has the advantages of simplicity, easiness in operation, mild conditions, suitability for mass production and the like.
The third purpose of the invention is to provide a cleaning method, which does not corrode or damage the pipe wall of the titanium tetrachloride preheater coil pipe, and has good cleaning effect and thorough cleaning.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the invention provides a cleaning agent for a titanium tetrachloride preheater coil, which is mainly prepared from the following components in parts by weight:
400-500 parts of water (including but not limited to 410 parts, 420 parts, 430 parts, 440 parts, 450 parts, 460 parts, 470 parts, 480 parts, 490 parts of any one of the points or any value in the range between any two), 550-750 parts of phosphoric acid (including but not limited to 560 parts, 580 parts, 600 parts, 620 parts, 650 parts, 680 parts, 700 parts, 725 parts of any one of the points or any value in the range between any two), 0.5-2 parts of surfactant (including but not limited to 0.7 parts, 0.9 parts, 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts of any one of the points or any value in the range between any two), 0.8-3 parts of hydroxyethylidene diphosphonic acid (including but not limited to 1 part, 1.3 parts, 1.5 parts, 1.8 parts, 2 parts, 2.3 parts, 2.5 parts, 2.8 parts of thiourea), or 0.5-4 parts of thiourea (including but not limited to 0.5 parts of thiourea), and 1.5 parts of thiourea (1.5 parts of the amino group) of the group, 0.7 parts, 0.9 parts, 1 part, 1.2 parts, 1.4 parts, or any value in the range between any two) and 0.2-0.5 parts of ethylenediaminetetraacetic acid (EDTA) (including but not limited to any one of 0.3 parts, 0.4 parts, or any value in the range between any two).
The titanium tetrachloride preheater is a device for preheating and heating titanium tetrachloride. A coiled tubing is a pipe system that takes the form of a helix. The material of the coil is inconel 601 alloy (nickel-chromium-iron-based solid solution strengthening alloy).
Impurities contained in the coil tube of the titanium tetrachloride preheater except carbon deposit (the main component is carbon) comprise: chromium carbide, nickel carbide, silicon tetrachloride, vanadyl dichloride and the like.
The phosphoric acid can dissolve carbon deposition and other carbides in the coil pipe of the titanium tetrachloride preheater and generate a phosphate coating film to prevent surface corrosion; meanwhile, the phosphoric acid can change calcium salt and magnesium salt into soluble phosphate to prevent the generation of metal soap, and also has the emulsification effect (the phosphate can lead the lipid to form a glue film, thereby leading the lipid to be more effectively dispersed in water).
Hydroxyethylidene diphosphonic acid is also called HEDP, hydroxyethylidene diphosphonic acid. It can form stable complex with iron, copper, zinc and other metal ions, dissolve the oxide on the surface of metal, speed the removal of oxide layer and protect the surface of alloy from corrosion.
The thiosemicarbazide can generate a synergistic effect with the HEDP, so that the corrosion of the alloy surface is reduced, the alloy surface becomes smooth, impurities are not easy to attach, and the service life of the coil pipe is prolonged.
EDTA can remove the adverse effect of metal ions on the descaling effect, has good sealing effect on the metal ions, and enhances the washing effect of phosphoric acid.
The surfactant has good performances of emulsification, decontamination, cleaning and the like, and can enhance the cleaning effect of the cleaning agent.
In some specific embodiments of the invention, when the titanium tetrachloride preheater coil is cleaned by using the cleaning agent, the ratio of water: 1, cleaning agent: 4 (volume ratio) was diluted.
Preferably, the surfactant comprises at least one of fatty alcohol-polyoxyethylene ether (AEO-9), sodium lauryl sulfate, linear alkyl benzene sulfonic acid, cetyl trimethyl ammonium chloride, stearic acid, and polydimethylsiloxane.
The fatty alcohol-polyoxyethylene ether has good performances of emulsification, decontamination, cleaning and the like, and can improve the washing effect.
Preferably, the fatty alcohol-polyoxyethylene ether is C12-C14 fatty alcohol-polyoxyethylene ether.
Preferably, the mass fraction of the phosphoric acid is 80-90%; including but not limited to, any one of 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, or a range of values between any two.
The invention also provides a preparation method of the cleaning agent for the titanium tetrachloride preheater coil, which comprises the following steps:
mixing the above materials.
The preparation method has the advantages of simple operation, short process flow, mild conditions, suitability for mass production and the like.
Preferably, in the mixing process, the temperature of the mixed materials is 30-70 ℃.
The temperature range is favorable for fully and uniformly mixing all the components.
Preferably, the preparation method specifically comprises the following steps:
adding a surfactant into a mixed solution containing water and phosphoric acid, and sequentially adding hydroxyethylidene diphosphonic acid, thiosemicarbazide and ethylenediamine tetraacetic acid into the mixed solution after the surfactant is uniformly mixed.
In some specific embodiments of the present invention, the preparation method specifically comprises the following steps: and uniformly mixing water and phosphoric acid, heating to 30-70 ℃ in a water bath kettle, and keeping the temperature constant. The surfactant is slowly dropped into the mixed solution containing water and phosphoric acid, and is continuously stirred. Then HEDP, thiosemicarbazide and EDTA were added thereto in this order.
In some specific embodiments of the present invention, the preparation method further comprises a step of diluting the cleaning agent, and the dilution is performed before the rinsing.
The invention also provides a cleaning method using the cleaning agent for the titanium tetrachloride preheater coil, which comprises the following steps:
and introducing the cleaning agent into a coil of a titanium tetrachloride preheater for washing.
The cleaning method has the advantages that the pipe wall of the titanium tetrachloride preheater coil pipe cannot be corroded, damaged or damaged, the cleaning effect is good, and the blockage and scale in the titanium tetrachloride preheater coil pipe can be thoroughly cleaned.
Preferably, the cleaning method specifically comprises the following steps: and continuously introducing the cleaning agent into the coil pipe of the titanium tetrachloride preheater for cyclic washing.
And the cleaning agent is introduced from the inlet of the titanium tetrachloride preheater coil, flows out from the outlet of the titanium tetrachloride preheater coil after passing through the pipeline of the coil, and is repeatedly washed for multiple times to finish multiple times of circular washing.
Preferably, the time (total time) of the cyclic flushing is 20-40 min, including but not limited to a point value of any one of 25min, 30min, 35min or a range value between any two.
Preferably, during the circulating flushing, the cleaning agent is subjected to solid-liquid separation before entering the head end of the titanium tetrachloride preheater coil each time.
Namely, when the titanium tetrachloride preheater coil is circularly washed for multiple times, after the titanium tetrachloride preheater coil flows out from the outlet, the cleaning agent is subjected to solid-liquid separation to separate solid materials in the titanium tetrachloride preheater coil, so that the solid materials are prevented from being brought into the coil again; then the liquid material obtained after the solid-liquid separation is introduced from the inlet of the titanium tetrachloride preheater coil again.
Preferably, in the washing process, the temperature of the cleaning agent is 60-70 ℃; including but not limited to any one of 61 deg.C, 62 deg.C, 63 deg.C, 64 deg.C, 65 deg.C, 66 deg.C, 67 deg.C, 68 deg.C, 69 deg.C, or a range of values therebetween.
The adoption of the temperature is beneficial to fully removing carbon deposition and scaling in the coil pipe of the titanium tetrachloride preheater, and the coil pipe is not easy to corrode.
Preferably, in the flushing process, the introduction flow of the cleaning agent (namely the flow velocity of the cleaning agent in the coil pipe) is 10-15 m 3 H, including but not limited to 11m 3 /h、12m 3 /h、13m 3 /h、14m 3 A point value of any one of/h or a range value between any two.
The temperature and the introduction flow in the range are favorable for fully removing carbon deposition and scale in the coil pipe of the titanium tetrachloride preheater, and the coil pipe is not easy to corrode.
Preferably, the titanium tetrachloride preheater coils are subjected to a gas purge prior to the flushing;
namely, after the coil pipe is detached, firstly, gas purging is adopted to dredge the coil pipe, and then the cleaning agent is introduced to flush the coil pipe.
Preferably, the gas comprises nitrogen and/or a noble gas (argon, helium or neon may be chosen).
Preferably, the method further comprises the step of drying the rinsed titanium tetrachloride preheater coil after the rinsing is finished.
More preferably, the drying is performed using a gas purge. Wherein, the gas can adopt at least one of nitrogen, argon, helium and neon.
In some embodiments of the invention, the coiled tubing is removed and then purged with nitrogen to unblock the coiled tubing. Since the coiled pipe is generally composed of a plurality of pipes surrounded by each other, taking the coiled pipe formed by 3 pipes surrounded by each other as an example, the cleaning agent is introduced into each of the 3 pipes. As shown in figure 1, a cleaning agent is added into the cleaning tank, the temperature of the cleaning agent in the cleaning tank is controlled to be 60-70 ℃ by an electric furnace, then the cleaning agent is injected into 3 pipes of the coil pipe, the cleaning agent enters the pipe coil and then is circulated to the cleaning tank, and then the cleaning agent is injected into the coil pipe continuously for multiple times, so that the total time of washing is 20-40 min. Before the cleaning agent circulates to the cleaning tank each time, a filtering device is adopted to filter out solids to prevent the solids from being brought into the coil pipe again; then the filtered liquid material is introduced into the pipeline of the coil pipe. After cleaning, the mixture is dried by nitrogen.
Compared with the prior art, the invention has the beneficial effects that:
(1) the cleaning agent for the titanium tetrachloride preheater coil has a good cleaning effect, can effectively remove scales such as carbon deposit, chloride, calcium salt and magnesium salt on the titanium tetrachloride preheater coil, and cannot corrode the titanium tetrachloride preheater coil.
(2) The cleaning method provided by the invention has the advantages of good cleaning effect and thorough cleaning, and the cleaning method can not corrode or damage the pipe wall of the coil pipe of the titanium tetrachloride preheater.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of the structure of a cleaning device containing a titanium tetrachloride preheater coil provided by the invention;
FIG. 2 is a picture of a titanium tetrachloride preheater coil prior to cleaning as provided by the present invention;
fig. 3 is a photograph of a titanium tetrachloride preheater coil after cleaning as provided by the present invention.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and the detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
FIG. 1 is a schematic structural diagram of a cleaning device containing a titanium tetrachloride preheater coil provided by the invention.
Example 1
The cleaning agent for the titanium tetrachloride preheater coil is prepared from the following components in parts by weight:
450 parts of water, 650 parts of phosphoric acid with the mass fraction of 85%, 1.5 parts of surfactant (C12-C14 fatty alcohol polyoxyethylene ether), 2 parts of hydroxyethylidene diphosphonic acid, 1 part of thiosemicarbazide and 0.4 part of ethylene diamine tetraacetic acid.
The preparation method of the cleaning agent provided by the embodiment comprises the following steps: mixing water and phosphoric acid, heating to 40 deg.C in water bath, and maintaining constant temperature. The surfactant is slowly dropped into the mixed solution containing water and phosphoric acid, and is continuously stirred. Then, hydroxyl ethylidene diphosphonic acid, thiosemicarbazide and ethylene diamine tetraacetic acid are added into the mixture in sequence.
Example 2
The cleaning agent for the titanium tetrachloride preheater coil is prepared from the following components in parts by weight:
400 parts of water, 550 parts of phosphoric acid with the mass fraction of 85%, 2 parts of surfactant (C12-C14 fatty alcohol polyoxyethylene ether), 0.8 part of hydroxyethylidene diphosphonic acid, 0.5 part of thiosemicarbazide and 0.2 part of ethylene diamine tetraacetic acid.
The preparation method of the cleaning agent provided by the embodiment is basically the same as that of the embodiment 1, and the difference is only that the temperature of the water bath is heated to 50 ℃.
Example 3
The cleaning agent for the titanium tetrachloride preheater coil provided by the embodiment is prepared from the following components in parts by weight:
500 parts of water, 750 parts of phosphoric acid with the mass fraction of 85%, 0.5 part of surfactant (C12-C14 fatty alcohol polyoxyethylene ether), 3 parts of hydroxyethylidene diphosphonic acid, 0.4 part of thiosemicarbazide and 0.2 part of ethylene diamine tetraacetic acid.
The preparation method of the cleaning agent provided by the embodiment is basically the same as that of the embodiment 1, and the difference is only that the temperature of the water bath is heated to 60 ℃.
Example 4
The cleaning agent for the titanium tetrachloride preheater coil provided by the embodiment is prepared from the following components in parts by weight:
400 parts of water, 700 parts of phosphoric acid with the mass fraction of 80%, 1 part of surfactant (lauryl sodium sulfate), 2 parts of hydroxyethylidene diphosphonic acid, 1.5 parts of thiosemicarbazide and 0.5 part of ethylene diamine tetraacetic acid.
The preparation method of the cleaning agent provided by the embodiment is basically the same as that of the embodiment 1, and the difference is only that the temperature of the water bath is heated to 70 ℃.
Example 5
The cleaning method provided by the embodiment comprises the following steps:
and (4) removing the coil pipe, and then purging with nitrogen to dredge the coil pipe. Then, continuously introducing a cleaning agent into the coil pipe of the titanium tetrachloride preheater for cyclic washing; total time of circulating flushingIt is 20 min. During the period, the temperature of the cleaning agent is kept at 65 ℃, and the flow of the cleaning agent is 12m 3 H is used as the reference value. And before entering the inlet of the titanium tetrachloride preheater coil, performing solid-liquid separation on the cleaning agent. After the cleaning, the mixture was dried with nitrogen.
Example 6
The cleaning method provided by this embodiment is substantially the same as that of embodiment 5, except that: firstly, replacing the total time of the circulating flushing by 30 min; secondly, keeping the temperature of the cleaning agent at 60 ℃; thirdly, the flow of the cleaning agent is replaced by 10m 3 /h。
Example 7
The cleaning method provided by this embodiment is substantially the same as that of embodiment 5, except that: firstly, replacing the total time of the circulating flushing by 40 min; secondly, keeping the temperature of the cleaning agent at 70 ℃; thirdly, the flow of the cleaning agent is replaced by 15m 3 /h。
Comparative example 1
The composition of the cleaning agent provided in this comparative example was substantially the same as that of example 1 except that 1.5 parts by mass of the surfactant was replaced with 1.5 parts by mass of 85% phosphoric acid.
Comparative example 2
The composition of the cleaning agent provided in this comparative example was substantially the same as that of example 1 except that 2 parts of hydroxyethylidene diphosphonic acid was replaced with 2 parts of 85 mass% phosphoric acid.
Comparative example 3
The composition of the cleaning agent provided in this comparative example was substantially the same as that of example 1 except that 1 part of thiosemicarbazide was replaced with 1 part of phosphoric acid having a mass fraction of 85%.
Comparative example 4
The composition of the cleaning agent provided in this comparative example was substantially the same as that of example 1 except that 0.4 part of ethylenediaminetetraacetic acid was replaced with 0.4 part of 85 mass% phosphoric acid.
Comparative example 5
The cleaning agent provided by the comparative example is prepared from 450 parts by weight of water and 650 parts by weight of phosphoric acid (mass fraction is 85%).
Comparative example 6
The cleaning agent provided by the comparative example is prepared from the following components in parts by weight:
250 parts of water, 850 parts of phosphoric acid with the mass fraction of 85%, 1.5 parts of surfactant (C12-C14 fatty alcohol polyoxyethylene ether), 2 parts of hydroxyethylidene diphosphonic acid, 1 part of thiosemicarbazide and 0.4 part of ethylenediamine tetraacetic acid.
The cleaning agents of comparative examples 1 to 6 were prepared in the same manner as in example 1.
Experimental example 1
Several titanium tetrachloride preheater coils were cleaned using the cleaning agents prepared in examples 1 to 4 and comparative examples 1 to 6, respectively, and the cleaning method provided in example 5. And separately measure the coil mass before and after cleaning (and record the condition of the coil inner surface after cleaning). Then, the coils after cleaning were soaked with the cleaning agents prepared in examples 1 to 4 and comparative examples 1 to 6, respectively, and the quality of the coils after 24 hours, 48 hours and 72 hours of soaking was recorded. The results are shown in table 1 below.
The cleaning agents of the groups were diluted before the cleaning agents of examples 1 to 4 and comparative examples 1 to 6 were used. The volume ratio of dilution is water: 1, cleaning agent: 4.
TABLE 1 quality of each coil set before and after cleaning and after soaking
As can be seen from Table 1, the cleaning agent provided by the invention has good cleaning effect in each embodiment, can effectively remove carbon deposition and dirt on the coil pipe of the titanium tetrachloride preheater, and does not corrode the coil pipe.
Meanwhile, pictures of the titanium tetrachloride preheater coil before and after cleaning using the cleaning agent prepared in example 1 were taken, and the results are shown in fig. 2 and fig. 3, respectively. As can be seen from fig. 3, the cleaning agent can clean the coil thoroughly without corroding the coil.
While particular embodiments of the present invention have been illustrated and described, it will be appreciated that the above embodiments are merely illustrative of the technical solution of the present invention and are not restrictive; those of ordinary skill in the art will understand that: modifications may be made to the above-described embodiments, or equivalents may be substituted for some or all of the features thereof without departing from the spirit and scope of the present invention; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; it is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
Claims (10)
1. The cleaning agent for the titanium tetrachloride preheater coil is characterized by mainly comprising the following components in parts by weight:
400-500 parts of water, 550-750 parts of phosphoric acid, 0.5-2 parts of surfactant, 0.8-3 parts of hydroxyethylidene diphosphonic acid, 0.4-1.5 parts of thiosemicarbazide and 0.2-0.5 part of ethylene diamine tetraacetic acid.
2. The cleaning agent for titanium tetrachloride preheater coils as set forth in claim 1, wherein said surfactant comprises at least one of fatty alcohol-polyoxyethylene ether, sodium lauryl sulfate, linear alkyl benzene sulfonic acid, cetyltrimethylammonium chloride, stearic acid, and polydimethylsiloxane.
3. The cleaning agent for titanium tetrachloride preheater coils as claimed in claim 1, wherein the mass fraction of the phosphoric acid is 80-90%.
4. The preparation method of the cleaning agent for the titanium tetrachloride preheater coil as claimed in any one of claims 1 to 3, characterized by comprising the following steps:
mixing the above materials.
5. The preparation method according to claim 4, wherein the temperature of the mixed material is 30-70 ℃ in the mixing process.
6. The preparation method according to claim 4, characterized in that the preparation method specifically comprises the steps of:
adding a surfactant into a mixed solution containing water and phosphoric acid, uniformly mixing, and then sequentially adding hydroxyethylidene diphosphonic acid, thiosemicarbazide and ethylenediamine tetraacetic acid into the mixed solution.
7. The cleaning method for the titanium tetrachloride preheater coil is characterized by comprising the following steps of:
and introducing the cleaning agent into a coil of a titanium tetrachloride preheater for washing.
8. The cleaning method according to claim 7, characterized in that the cleaning method comprises in particular the steps of: continuously introducing the cleaning agent into the titanium tetrachloride preheater coil pipe for cyclic washing;
preferably, the time of the circulating flushing is 20-40 min;
preferably, during the circulating flushing, the cleaning agent is subjected to solid-liquid separation before entering the head end of the titanium tetrachloride preheater coil each time.
9. The cleaning method according to claim 7, wherein the temperature of the cleaning agent is 60-70 ℃ in the process of flushing;
preferably, in the flushing process, the flow of the cleaning agent is 10-15 m 3 /h。
10. The cleaning process according to claim 7, wherein the titanium tetrachloride preheater coil is subjected to a gas purge prior to the purging;
preferably, the gas comprises nitrogen and/or a noble gas;
preferably, after the washing is finished, the method further comprises the step of drying the washed titanium tetrachloride preheater coil; more preferably, the drying is performed using a gas purge.
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| CN202210695349.6A CN115044415A (en) | 2022-06-20 | 2022-06-20 | Cleaning agent for titanium tetrachloride preheater coil pipe and preparation method and application thereof |
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| CN202210695349.6A CN115044415A (en) | 2022-06-20 | 2022-06-20 | Cleaning agent for titanium tetrachloride preheater coil pipe and preparation method and application thereof |
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| CN86104101A (en) * | 1986-11-14 | 1988-05-25 | 上海宝钢冶金建设公司机械设备安装工程公司 | Phosphoric cleaning agent and compound method thereof |
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| CN103521482A (en) * | 2013-10-14 | 2014-01-22 | 上海泰如一环境科技工程有限公司 | Method for cleaning train pneumatic brake tube system |
| CN106894029A (en) * | 2015-12-18 | 2017-06-27 | 比亚迪股份有限公司 | A kind of aluminum alloy cleaning agent and preparation method thereof and aluminium alloy cleaning method |
| CN113512728A (en) * | 2021-06-25 | 2021-10-19 | 深圳市恒纬祥科技有限公司 | Cleaning agent for removing silicon dioxide grinding fluid on surface of 6-series aluminum alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN86104101A (en) * | 1986-11-14 | 1988-05-25 | 上海宝钢冶金建设公司机械设备安装工程公司 | Phosphoric cleaning agent and compound method thereof |
| CN101768749A (en) * | 2008-12-30 | 2010-07-07 | 沈阳黎明航空发动机(集团)有限责任公司 | Chemical carbon removing method of high-pressure turbine blade |
| CN103521482A (en) * | 2013-10-14 | 2014-01-22 | 上海泰如一环境科技工程有限公司 | Method for cleaning train pneumatic brake tube system |
| CN106894029A (en) * | 2015-12-18 | 2017-06-27 | 比亚迪股份有限公司 | A kind of aluminum alloy cleaning agent and preparation method thereof and aluminium alloy cleaning method |
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