CN111826244A - Scale cleaning fluid for ionic liquid alkylation device and application method thereof - Google Patents
Scale cleaning fluid for ionic liquid alkylation device and application method thereof Download PDFInfo
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- CN111826244A CN111826244A CN202010682684.3A CN202010682684A CN111826244A CN 111826244 A CN111826244 A CN 111826244A CN 202010682684 A CN202010682684 A CN 202010682684A CN 111826244 A CN111826244 A CN 111826244A
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- 238000004140 cleaning Methods 0.000 title claims abstract description 118
- 238000005804 alkylation reaction Methods 0.000 title claims abstract description 43
- 239000002608 ionic liquid Substances 0.000 title claims abstract description 42
- 230000029936 alkylation Effects 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000012530 fluid Substances 0.000 title claims description 9
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 239000000126 substance Substances 0.000 claims abstract description 23
- 238000005554 pickling Methods 0.000 claims abstract description 14
- 239000004094 surface-active agent Substances 0.000 claims abstract description 10
- 239000008139 complexing agent Substances 0.000 claims abstract description 9
- 239000003112 inhibitor Substances 0.000 claims abstract description 9
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000008367 deionised water Substances 0.000 claims abstract description 5
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 5
- 238000010521 absorption reaction Methods 0.000 claims description 60
- 239000002912 waste gas Substances 0.000 claims description 55
- 238000006386 neutralization reaction Methods 0.000 claims description 34
- 239000007921 spray Substances 0.000 claims description 23
- 230000007797 corrosion Effects 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 claims description 11
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000013543 active substance Substances 0.000 claims description 9
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 4
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims description 3
- 239000002211 L-ascorbic acid Substances 0.000 claims description 3
- 235000000069 L-ascorbic acid Nutrition 0.000 claims description 3
- XOBKSJJDNFUZPF-UHFFFAOYSA-N Methoxyethane Chemical compound CCOC XOBKSJJDNFUZPF-UHFFFAOYSA-N 0.000 claims description 3
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 claims description 3
- 125000000129 anionic group Chemical group 0.000 claims description 3
- 229960005070 ascorbic acid Drugs 0.000 claims description 3
- STNSYZSNIYTNMI-UHFFFAOYSA-N azane;[2-[bis(phosphonomethyl)amino]ethyl-(phosphonomethyl)amino]methylphosphonic acid Chemical compound N.OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O STNSYZSNIYTNMI-UHFFFAOYSA-N 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 125000002091 cationic group Chemical group 0.000 claims description 3
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 3
- PPASLZSBLFJQEF-RXSVEWSESA-M sodium-L-ascorbate Chemical compound [Na+].OC[C@H](O)[C@H]1OC(=O)C(O)=C1[O-] PPASLZSBLFJQEF-RXSVEWSESA-M 0.000 claims description 3
- 235000019187 sodium-L-ascorbate Nutrition 0.000 claims description 3
- 239000011755 sodium-L-ascorbate Substances 0.000 claims description 3
- 229910000406 trisodium phosphate Inorganic materials 0.000 claims description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims 1
- 229960004279 formaldehyde Drugs 0.000 claims 1
- 235000019256 formaldehyde Nutrition 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 14
- 239000000243 solution Substances 0.000 description 14
- 239000007789 gas Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000012546 transfer Methods 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
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/0005—Other compounding ingredients characterised by their effect
- C11D3/0073—Anticorrosion compositions
-
- 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
- C11D3/044—Hydroxides or bases
-
- 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
- C11D3/046—Salts
-
- 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
- C11D3/20—Organic compounds containing oxygen
- C11D3/2003—Alcohols; Phenols
- C11D3/2006—Monohydric alcohols
-
- 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
- C11D3/20—Organic compounds containing oxygen
- C11D3/2068—Ethers
-
- 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
- C11D3/20—Organic compounds containing oxygen
- C11D3/2096—Heterocyclic compounds
-
- 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
- C11D3/36—Organic compounds containing phosphorus
- C11D3/364—Organic compounds containing phosphorus containing nitrogen
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- C11D2111/20—
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Inorganic Chemistry (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The application relates to a scale cleaning liquid for an ionic liquid alkylation device and a using method thereof, relating to the technical field of liquefied gas recovery, wherein the cleaning liquid comprises the following components in percentage by weight: 0.1-2.5 percent of pickling inhibitor, 0-10 percent of alkaline substance, 0-2 percent of surfactant, 0-5 percent of builder, and Fe3+0 to 2.5 percent of reducing agent and Fe3+0 to 2.5 percent of complexing agent and 75.5 to 99.9 percent of deionized water. This application is through the rational ratio of multiple chemical composition, under the lower prerequisite of assurance cost, coordinates cleaning equipment to obtain the cleaning performance of preferred, improves the efficiency of cleaning.
Description
Technical Field
The invention relates to the technical field of liquefied gas recovery, in particular to a scale cleaning solution for an ionic liquid alkylation device.
Background
The alkylate oil is colorless liquid, has high octane value, good chemical stability, physical stability and low toxicity, has no corrosivity, and is convenient for storage and transportation.
At present, the alkylation techniques are mainly HF alkylation, H2SO4Alkylation using HF as the formerIs a catalyst, since HF has a strong corrosive effect on the skin. Therefore, there is a great risk of harm to the human body using HF alkylation. And with H2SO4Alkylation as a catalyst is effective in reducing the risk of injury to the human body when H2SO4In the using process, the waste H cannot be recycled due to the reduction of concentration and purity2SO4The treatment process can cause serious problems of environmental pollution, equipment corrosion and the like.
In recent years, an ionic liquid alkylation technology has been developed, which can solve the risk of the catalyst damaging the human body and can greatly reduce the generation amount of the waste catalyst, thereby reducing the pollution to the environment.
While the ionic liquid acts as a catalyst, the ionic liquid itself generates a small amount of solid particles because of participating in the reaction, and even if the ionic liquid is subjected to a sedimentation separation measure, the solid particles still deposit in a tower, a container, a heat exchanger, a filter and related process pipelines through which the ionic liquid passes.
The scaling substances deposited on the tray can cause the separation efficiency of the tower to be reduced, and can seriously cause the liquid flow to be incapable of naturally reducing, thereby causing the phenomenon of flooding or flushing the tower; the scale substances deposited at the bottom of the container can cause the blockage of a pressure guiding pipe of the container liquid level meter, so that an error signal is generated in measurement, and a safety accident is caused; the heat transfer resistance can be improved by the scaling substances deposited in the heat exchanger, and the heat exchange efficiency of the heat exchanger is obviously reduced; the fouling substances deposited in the filter can block the filter, so that the flow area of the filter is reduced, and the pressure drop of the filter is increased to force the filter to stop running; the scale substances deposited in the process pipeline can reduce the pipe diameter of the process pipeline, reduce the flow capacity and the like. Meanwhile, the process pipeline is attached to the surface of metal equipment, so that scale electrochemical corrosion is easily generated, and corrosion perforation of the equipment is caused. Therefore, the scale is required to be removed periodically to ensure that the daily work can be smoothly performed.
The chemical cleaning agent is used as a chemical agent for removing scale, and needs to provide a better cleaning effect, so that the efficiency of cleaning work is improved.
Disclosure of Invention
The embodiment of the application provides an ionic liquid alkylation unit scale deposit washing liquid, through the rational ratio of multiple chemical composition, under the lower prerequisite of assurance cost, cooperation cleaning equipment obtains the cleaning performance of preferred, improves the efficiency of cleaning.
In a first aspect, a fouling cleaning solution for an ionic liquid alkylation device is provided, wherein the cleaning solution comprises the following components in percentage by weight:
0.1-2.5 percent of pickling inhibitor, 0-10 percent of alkaline substance, 0-2 percent of surfactant, 0-5 percent of builder, and Fe3+0 to 2.5 percent of reducing agent and Fe3+0 to 2.5 percent of complexing agent and 75.5 to 99.9 percent of deionized water.
Specifically, the pickling corrosion inhibitor comprises at least one of Lan826, Lan5, Tourette, CM911 or urotropine.
Specifically, the alkaline substance comprises NaOH, KOH and NH3、Ca(OH)2Or Na3PO4At least one of (1).
Specifically, the surfactant includes at least one of an anionic active agent, a cationic active agent, or a nonionic active agent.
Specifically, the builder comprises at least one of methanol, ethanol and methyl ethyl ether.
In particular, the Fe3+The reducing agent comprises Na2S2O3、Na2SO3At least one of L-ascorbic acid and sodium L-ascorbate.
In particular, the Fe3+The complexing agent comprises at least one of NTA, EDTA-2Na, DTPA, EDTMPS and DETPMS.
In a second aspect, there is provided a method of using a fouling cleaning solution for an ionic liquid alkylation unit based on the first aspect, the method being based on at least two spray absorption towers connected in series, the method comprising the steps of:
cleaning the ionic liquid alkylation device by using the scaling cleaning liquid of the ionic liquid alkylation device, and collecting cleaning waste gas generated during cleaning;
introducing the cleaning waste gas into a first spray absorption tower;
detecting the concentration of HCl in the cleaning waste gas after neutralization and absorption in the spray absorption tower;
when the concentration of HCl in the neutralized and absorbed cleaning waste gas reaches the standard, discharging the neutralized and absorbed cleaning waste gas;
when the HCl concentration in the cleaning waste gas after neutralization and absorption exceeds the standard, introducing the cleaning waste gas after neutralization and absorption into the next spraying absorption tower for neutralization and absorption until the HCl concentration in the cleaning waste gas after neutralization and absorption reaches the standard.
In a third aspect, there is provided a method of using a fouling cleaning solution for an ionic liquid alkylation unit according to the first aspect, the method being based on at least two aeration-liquid mixing units connected in series, the method comprising the steps of:
cleaning the ionic liquid alkylation device by using the scaling cleaning liquid of the ionic liquid alkylation device, and collecting cleaning waste gas generated during cleaning;
introducing the cleaning waste gas into a first gas-liquid mixing device;
detecting the concentration of HCl in the cleaning waste gas after neutralization and absorption in the gas-liquid mixing device;
when the concentration of HCl in the neutralized and absorbed cleaning waste gas reaches the standard, discharging the neutralized and absorbed cleaning waste gas;
when the HCl concentration in the cleaning waste gas after neutralization and absorption exceeds the standard, introducing the cleaning waste gas after neutralization and absorption into the next gas-liquid mixing device for neutralization and absorption until the HCl concentration in the cleaning waste gas after neutralization and absorption reaches the standard.
The beneficial effect that technical scheme that this application provided brought includes:
the application provides an ionic liquid alkylation unit scale deposit washing liquid, through the rational ratio of multiple chemical composition, under the lower prerequisite of assurance cost, the cleaning performance that cooperation cleaning equipment obtained the preferred improves the efficiency of cleaning work.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a spray absorption tower corresponding to a cleaning operation performed by using a fouling cleaning solution of an ionic liquid alkylation apparatus according to embodiment 2 of the present application;
FIG. 2 is a schematic structural diagram of a gas-liquid mixing device corresponding to the cleaning operation performed by using the fouling cleaning solution of the ionic liquid alkylation apparatus provided in example 3 of the present application;
reference numerals:
10. spraying an absorption tower; 11. a filler; 12. a gas inlet channel; 13. a spray liquid receiving tank; 14. a shower head; 15. a cooler; 16. a spray liquid circulating pump; 20. a gas inlet port; 21. a liquid inlet; 22. a filler; 23. a mixing chamber; 24. a mixing dispenser; 25. and a liquid discharge port.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. 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 application.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The embodiment of the application provides an ionic liquid alkylation unit scale deposit washing liquid, through the rational ratio of multiple chemical composition, under the lower prerequisite of assurance cost, cooperation cleaning equipment obtains the cleaning performance of preferred, improves the efficiency of cleaning.
In order to achieve the technical effects, the general idea of the application is as follows:
a scale cleaning liquid for an ionic liquid alkylation device comprises the following components in percentage by weight:
0.1-2.5 percent of pickling inhibitor, 0-10 percent of alkaline substance, 0-2 percent of surfactant, 0-5 percent of builder, and Fe3+0 to 2.5 percent of reducing agent and Fe3+0 to 2.5 percent of complexing agent and 75.5 to 99.9 percent of deionized water.
Example 1
The embodiment of the application provides a scale cleaning solution for an ionic liquid alkylation device, which comprises the following components in percentage by weight:
0.1-2.5 percent of pickling inhibitor, 0-10 percent of alkaline substance, 0-2 percent of surfactant, 0-5 percent of builder, and Fe3+0 to 2.5 percent of reducing agent and Fe3+0 to 2.5 percent of complexing agent and 75.5 to 99.9 percent of deionized water.
In the embodiment of the application, the pickling inhibitor is mainly used for retarding the corrosion of acid to a metal matrix in the metal pickling process, has good corrosion inhibition effect in various chemical pickling processes, greatly reduces the corrosion rate of metal under normal use, has excellent capability of inhibiting the hydrogen evolution of steel in the pickling process, avoids the hydrogen embrittlement of the steel, inhibits the corrosion of Fe to the metal in the pickling process, and prevents the metal from generating pitting corrosion;
the alkaline substance can be used for slowing down the corrosion of acid to a metal matrix in the metal pickling process and plays a certain role in buffering;
the surfactant is a substance which can obviously change the interface state of a solution system of the detergent by adding a small amount of the surfactant and is used for improving the cleaning efficiency;
builders as such, in order to improve cleaning efficiency;
Fe3+the complexing agent is used for softening water quality, preventing precipitates and eliminating scales of dyeing and finishing equipment;
this application embodiment is through the rational ratio of multiple chemical composition, under the prerequisite that the assurance cost is lower, coordinates cleaning equipment to obtain the cleaning performance of preferred, improves the efficiency of cleaning.
Specifically, the pickling corrosion inhibitor comprises at least one of Lan826, Lan5, Tourette, CM911 or urotropin.
Specifically, the alkaline substance comprises NaOH, KOH, NH3、Ca(OH)2Or Na3PO4At least one of (1).
Specifically, the surfactant includes at least one of an anionic active agent, a cationic active agent, or a nonionic active agent.
Specifically, the builder comprises at least one of methanol, ethanol and methyl ethyl ether.
In particular, Fe3+The reducing agent comprises Na2S2O3、Na2SO3At least one of L-ascorbic acid and sodium L-ascorbate.
In particular, Fe3+The complexing agent comprises at least one of NTA, EDTA-2Na, DTPA, EDTMPS and DETPMS.
Example 2
Referring to fig. 1, an embodiment of the present application provides a method for using a fouling cleaning solution based on the ionic liquid alkylation apparatus of embodiment 1, the method is based on at least two sequentially connected spray absorption towers, and the method comprises the following steps:
cleaning the ionic liquid alkylation device by using the scale cleaning liquid of the ionic liquid alkylation device, and collecting cleaning waste gas generated during cleaning;
introducing the cleaning waste gas into a first spray absorption tower;
detecting the concentration of HCl in the cleaning waste gas after neutralization and absorption in the spray absorption tower;
when the concentration of HCl in the cleaning waste gas after neutralization and absorption reaches the standard, discharging the cleaning waste gas after neutralization and absorption;
when the HCl concentration in the cleaning waste gas after neutralization and absorption exceeds the standard, introducing the cleaning waste gas after neutralization and absorption into the next spraying absorption tower for neutralization and absorption until the HCl concentration in the cleaning waste gas after neutralization and absorption reaches the standard.
When the cleaning waste gas is treated, the cleaning waste gas can be specifically used in a spray absorption tower and matched with an alkaline solution to neutralize HCl gas;
wherein, the spray absorption tower can adopt the structure as shown in figure 1: the spray absorption tower 10, a filler 11, a gas inlet channel 12, a spray liquid receiving groove 13, a spray header 14, a cooler 15 and a spray liquid circulating pump 16.
When the device is used specifically, firstly, an axial flow fan or a centrifugal fan can be arranged for pressurization according to the pressure of cleaning waste gas entering a spray absorption tower;
and then according to the absorption effect of the spray absorption tower, when the concentration of HCl in the treated cleaning waste gas discharged from the top of the spray absorption tower exceeds the standard, the gas exceeding the standard discharged from the top of the spray absorption tower can be introduced into the next-stage spray absorption tower for re-absorption until the concentration of HCl reaches the standard.
Example 3
Referring to fig. 2, another method for using a fouling cleaning solution based on the ionic liquid alkylation apparatus of example 1 is provided, and the method is based on at least two sequentially connected gas-liquid mixing apparatuses, and comprises the following steps:
cleaning the ionic liquid alkylation device by using the scale cleaning liquid of the ionic liquid alkylation device, and collecting cleaning waste gas generated during cleaning;
introducing the cleaning waste gas into a first gas-liquid mixing device;
detecting the concentration of HCl in the cleaning waste gas after neutralization and absorption in the gas-liquid mixing device;
when the concentration of HCl in the cleaning waste gas after neutralization and absorption reaches the standard, discharging the cleaning waste gas after neutralization and absorption;
when the HCl concentration in the cleaning waste gas after neutralization absorption exceeds the standard, introducing the cleaning waste gas after neutralization absorption into the next gas-liquid mixing device for neutralization absorption until the HCl concentration in the cleaning waste gas after neutralization absorption reaches the standard.
When the cleaning waste gas is treated, a gas-liquid mixing device can be used, and an alkaline solution is matched to neutralize HCl gas;
wherein, the gas-liquid mixing device can adopt the structure as shown in figure 2: a gas inlet 20, a liquid inlet 21, a packing 22, a mixing chamber 23, a mixing distributor 24, a liquid outlet 25;
when the device is used specifically, firstly, an axial flow fan or a centrifugal fan can be arranged for pressurization when the pressure is too small according to the pressure of the cleaning waste gas entering the gas-liquid mixing device;
then according to the absorption effect of the gas-liquid mixing device, when the HCl concentration in the treated cleaning waste gas discharged by the gas-liquid mixing device exceeds the standard, the gas exceeding the standard discharged by the gas-liquid mixing device can be introduced into the next-stage gas-liquid mixing device for re-absorption until the HCl concentration reaches the standard.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The scale cleaning liquid for the ionic liquid alkylation device is characterized by comprising the following components in percentage by weight:
0.1-2.5 percent of pickling inhibitor, 0-10 percent of alkaline substance, 0-2 percent of surfactant, 0-5 percent of builder, and Fe3+0 to 2.5 percent of reducing agent and Fe3+0 to 2.5 percent of complexing agent and 75.5 to 99.9 percent of deionized water.
2. The ionic liquid alkylation apparatus fouling cleaning fluid of claim 1, wherein:
the pickling corrosion inhibitor comprises at least one of Lan826, Lan5, formol, CM911 or urotropine.
3. The ionic liquid alkylation apparatus fouling cleaning fluid of claim 1, wherein:
the alkaline substance comprises NaOH, KOH and NH3、Ca(OH)2Or Na3PO4At least one of (1).
4. The ionic liquid alkylation apparatus fouling cleaning fluid of claim 1, wherein:
the surfactant includes at least one of an anionic active agent, a cationic active agent, or a nonionic active agent.
5. The ionic liquid alkylation apparatus fouling cleaning fluid of claim 1, wherein:
the builder comprises at least one of methanol, ethanol and methyl ethyl ether.
6. The ionic liquid alkylation apparatus fouling cleaning fluid of claim 1, wherein:
said Fe3+The reducing agent comprises Na2S2O3、Na2SO3At least one of L-ascorbic acid and sodium L-ascorbate.
7. The ionic liquid alkylation apparatus fouling cleaning fluid of claim 1, wherein:
said Fe3+The complexing agent comprises at least one of NTA, EDTA-2Na, DTPA, EDTMPS and DETPMS.
8. A method of using the ionic liquid alkylation unit fouling cleaning solution of claim 1, the method being based on at least two spray absorption towers in series communication, the method comprising the steps of:
cleaning the ionic liquid alkylation device by using the scaling cleaning liquid of the ionic liquid alkylation device, and collecting cleaning waste gas generated during cleaning;
introducing the cleaning waste gas into a first spray absorption tower;
detecting the concentration of HCl in the cleaning waste gas after neutralization and absorption in the spray absorption tower;
when the concentration of HCl in the neutralized and absorbed cleaning waste gas reaches the standard, discharging the neutralized and absorbed cleaning waste gas;
when the HCl concentration in the cleaning waste gas after neutralization and absorption exceeds the standard, introducing the cleaning waste gas after neutralization and absorption into the next spraying absorption tower for neutralization and absorption until the HCl concentration in the cleaning waste gas after neutralization and absorption reaches the standard.
9. A method of using a fouling cleaning fluid for an ionic liquid alkylation unit according to claim 1, said method being based on at least two sequentially connected gas-liquid mixing units, said method comprising the steps of:
cleaning the ionic liquid alkylation device by using the scaling cleaning liquid of the ionic liquid alkylation device, and collecting cleaning waste gas generated during cleaning;
introducing the cleaning waste gas into a first gas-liquid mixing device;
detecting the concentration of HCl in the cleaning waste gas after neutralization and absorption in the gas-liquid mixing device;
when the concentration of HCl in the neutralized and absorbed cleaning waste gas reaches the standard, discharging the neutralized and absorbed cleaning waste gas;
when the HCl concentration in the cleaning waste gas after neutralization and absorption exceeds the standard, introducing the cleaning waste gas after neutralization and absorption into the next gas-liquid mixing device for neutralization and absorption until the HCl concentration in the cleaning waste gas after neutralization and absorption reaches the standard.
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| CN202010682684.3A CN111826244A (en) | 2020-07-16 | 2020-07-16 | Scale cleaning fluid for ionic liquid alkylation device and application method thereof |
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Cited By (1)
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| CN114181780A (en) * | 2021-11-12 | 2022-03-15 | 深圳供电局有限公司 | Transformer substation insulator descaling agent, application thereof and cleaning method for surface dirt of transformer substation insulator |
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