CN116240051A - Deodorizing passivating agent and preparation method and application thereof - Google Patents
Deodorizing passivating agent and preparation method and application thereof Download PDFInfo
- Publication number
- CN116240051A CN116240051A CN202310309205.7A CN202310309205A CN116240051A CN 116240051 A CN116240051 A CN 116240051A CN 202310309205 A CN202310309205 A CN 202310309205A CN 116240051 A CN116240051 A CN 116240051A
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- China
- Prior art keywords
- passivating agent
- deodorizing
- water
- deodorant
- tower
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- 230000001877 deodorizing effect Effects 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 72
- 238000004140 cleaning Methods 0.000 claims abstract description 16
- 238000007670 refining Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 239000002781 deodorant agent Substances 0.000 claims description 30
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 30
- 238000005260 corrosion Methods 0.000 claims description 25
- 230000007797 corrosion Effects 0.000 claims description 25
- 239000003112 inhibitor Substances 0.000 claims description 23
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims description 22
- PXAJQJMDEXJWFB-UHFFFAOYSA-N acetone oxime Chemical compound CC(C)=NO PXAJQJMDEXJWFB-UHFFFAOYSA-N 0.000 claims description 16
- 235000010265 sodium sulphite Nutrition 0.000 claims description 15
- 239000012071 phase Substances 0.000 claims description 14
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 11
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 11
- 239000000347 magnesium hydroxide Substances 0.000 claims description 11
- 235000010288 sodium nitrite Nutrition 0.000 claims description 11
- 239000012808 vapor phase Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- VTIIJXUACCWYHX-UHFFFAOYSA-L disodium;carboxylatooxy carbonate Chemical compound [Na+].[Na+].[O-]C(=O)OOC([O-])=O VTIIJXUACCWYHX-UHFFFAOYSA-L 0.000 claims description 7
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims description 7
- 235000010234 sodium benzoate Nutrition 0.000 claims description 7
- 239000004299 sodium benzoate Substances 0.000 claims description 7
- 229940045872 sodium percarbonate Drugs 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- SJRJJKPEHAURKC-UHFFFAOYSA-N N-Methylmorpholine Chemical compound CN1CCOCC1 SJRJJKPEHAURKC-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 abstract description 22
- 239000007789 gas Substances 0.000 abstract description 20
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 abstract description 13
- 229910000037 hydrogen sulfide Inorganic materials 0.000 abstract description 13
- 238000002485 combustion reaction Methods 0.000 abstract description 10
- 230000002269 spontaneous effect Effects 0.000 abstract description 10
- 239000002253 acid Substances 0.000 abstract description 9
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 abstract description 8
- 150000003568 thioethers Chemical class 0.000 abstract description 8
- 239000003814 drug Substances 0.000 abstract description 7
- 230000009977 dual effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 14
- 238000004332 deodorization Methods 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 238000002161 passivation Methods 0.000 description 6
- 230000002378 acidificating effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- IGHXQFUXKMLEAW-UHFFFAOYSA-N iron(2+) oxygen(2-) Chemical compound [O-2].[Fe+2].[Fe+2].[O-2] IGHXQFUXKMLEAW-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G75/00—Inhibiting corrosion or fouling in apparatus for treatment or conversion of hydrocarbon oils, in general
- C10G75/02—Inhibiting corrosion or fouling in apparatus for treatment or conversion of hydrocarbon oils, in general by addition of corrosion inhibitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/485—Sulfur compounds containing only one sulfur compound other than sulfur oxides or hydrogen sulfide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/80—Organic bases or salts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/306—Organic sulfur compounds, e.g. mercaptans
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treating Waste Gases (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
The invention provides a deodorizing passivating agent, a preparation method and application thereof, and relates to the technical field of deodorizing of refining enterprises. The deodorizing passivating agent has the advantages of convenient implementation, strong pertinence, good thermal stability, good compatibility and harmony among medicaments, can neutralize residual acid gases such as hydrogen sulfide, mercaptan, thioether and the like accumulated at the top of tower equipment, and can eliminate spontaneous combustion of ferrous sulfide through a cleaning circulation loop formed by self-flowing sprinkling, thereby realizing the dual effects of deodorizing at the top of a tower and passivating at the middle and bottom of the tower.
Description
Technical Field
The invention relates to the technical field of deodorization of refining enterprises, in particular to a deodorizing passivating agent and a preparation method and application thereof.
Background
Along with the increasing proportion of sulfur-containing crude oil refined by domestic refining enterprises, a large amount of acidic water and acidic gas (such as hydrogen sulfide, mercaptan, thioether and the like) are accumulated at the tops of various tower equipment such as an atmospheric tower, a vacuum tower, a primary distillation tower, a fractionating tower, a resolving tower, a solvent regeneration tower, an acidic water stripping tower and the like, and a liquid material medium below the tops of the towers forms corrosion product accumulation containing ferrous sulfide, ferric oxide and the like during the production operation, so that ferrous sulfide spontaneous combustion can occur after the ferrous sulfide is easily contacted with air and water during the maintenance. During servicing of the refinery, these tower-type plants require both passivation and deodorization (i.e., removal of acid gases). Because the traditional passivating agent and the deodorant cannot have two different functions, the traditional passivating agent and the deodorant need to be cleaned in steps, namely: the deodorizing treatment is carried out on the tower top part, after 6-10 hours of cleaning, the passivation treatment is carried out on the outer part of the tower top, and the deodorizing treatment is a circulating pump station system. Therefore, the construction period is delayed, ferrous sulfide at the lower part of the tower top is inevitably contacted with oxygen and water due to the deodorizing period of the cleaning tower top, and the great risk of spontaneous combustion of ferrous sulfide at the lower part of the tower top in advance in the deodorizing process is increased.
Disclosure of Invention
The invention aims to provide a deodorizing and passivating agent, and a preparation method and application thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a deodorizing passivating agent which comprises the following components in percentage by weight: 10-15% of heat escaping type deodorant, 8-10% of passivating agent, 6-8% of water-based corrosion inhibitor, 4-6% of vapor phase corrosion inhibitor and the balance of water;
the heat escaping type deodorant comprises acetoxime and magnesium hydroxide;
the passivating agent comprises sodium sulfite and sodium nitrite.
Preferably, the mass ratio of the acetone oxime to the magnesium hydroxide is 4:1.
Preferably, the mass ratio of the sodium sulfite to the sodium nitrite is 3:1.
Preferably, the water-based corrosion inhibitor comprises sodium benzoate and sodium percarbonate; the mass ratio of the sodium benzoate to the sodium percarbonate is 1:1.
Preferably, the vapor phase corrosion inhibitor comprises liquid ammonia and methylmorpholine, and the mass ratio of the liquid ammonia to the methylmorpholine is 5:2.
Preferably, the water is demineralized water or tap water.
The invention provides a preparation method of the deodorizing passivating agent, which comprises the following steps: and mixing the heat escaping type deodorant, the passivating agent, the water-based corrosion inhibitor, the gas-phase corrosion inhibitor and water according to the composition of the deodorizing passivating agent to obtain the deodorizing passivating agent.
The invention provides application of the deodorizing passivating agent prepared by the scheme or the preparing method of the scheme in cleaning tower equipment of refining enterprises.
Preferably, the method of cleaning comprises the steps of:
pumping the deodorizing passivating agent into the tower top through a circulating pump for spraying, automatically flowing to the bottom of the tower, and then entering a circulating tank outside the tower; heating the circulating tank to 60-80 ℃, and forming a circulating system with the top and the bottom of the circulating tank.
Preferably, the time of the washing is 10 to 15 hours.
The invention provides a deodorizing passivating agent which comprises the following components in percentage by weight: 10-15% of heat escaping type deodorant, 8-10% of passivating agent, 6-8% of water-based corrosion inhibitor, 4-6% of vapor phase corrosion inhibitor and the balance of water; the heat escaping type deodorant comprises acetoxime and magnesium hydroxide; the passivating agent comprises sodium sulfite and sodium nitrite.
The heat escaping type deodorant is mainly composed of acetoxime and magnesium hydroxide, is injected into the top of tower type equipment, and is sprayed from top to bottom, wherein the acetoxime has volatility at the temperature of more than 40 ℃, so that the medicament in an alkaline type 'gas state' and the 'gas state' of acidic hydrogen sulfide, mercaptan and thioether are formed to be mutually staggered and react more fully; in addition, the magnesium hydroxide is sprayed in a 'vaporous' form from top to bottom in a dissolved state, and can also realize full contact reaction with hydrogen sulfide, mercaptan and thioether accumulated at the top of tower equipment in a 'gaseous' form with smaller specific gravity, so that the deodorizing effect is achieved.
The main components of the passivating agent, namely sodium sulfite and sodium nitrite, are sprayed and flowed along with the spraying liquid at the middle and lower parts of a large amount of accumulated ferrous sulfide tower equipment, so that the effect of preventing ferrous sulfide passivation is realized, and the deodorizing of gas-phase acid gas at the top of the equipment and the passivating function of ferrous sulfide at the middle and lower parts of the equipment can be realized without being divided into two steps.
In addition, the invention adopts the acetone oxime and sodium sulfite with deoxidization function, on one hand, the acetone oxime and sodium sulfite can generate nontoxic water and alkaline sodium salt through neutralization reaction with hydrogen sulfide, mercaptan and thioether, on the other hand, the acetone oxime and sodium sulfite can form a micro-area anoxic environment on the surface of equipment in a tower, to which the medicament is adhered, through the oxygen absorption effect of the acetone oxime and sodium sulfite in a relatively closed environment, and the spontaneous combustion phenomenon of residual adhered ferrous sulfide can be prevented.
The deodorizing passivating agent has the advantages of convenient implementation, strong pertinence, good thermal stability, good compatibility and harmony among medicaments, can neutralize residual acid gases such as hydrogen sulfide, mercaptan, thioether and the like accumulated at the top of tower equipment, and can eliminate ferrous sulfide spontaneous combustion through a cleaning circulation loop formed by self-flowing spraying, thereby realizing the dual effects of tower top deodorizing, tower middle and tower bottom passivation. The deodorizing passivating agent disclosed by the invention is nontoxic and harmless, does not generate waste gas and harmful chemical substances, is harmless to human bodies, and belongs to an environment-friendly and environment-friendly product.
Detailed Description
The invention provides a deodorizing passivating agent which comprises the following components in percentage by weight: 10-15% of heat escaping type deodorant, 8-10% of passivating agent, 6-8% of water-based corrosion inhibitor, 4-6% of vapor phase corrosion inhibitor and the balance of water;
the heat escaping type deodorant comprises acetoxime and magnesium hydroxide;
the passivating agent comprises sodium sulfite and sodium nitrite.
In the present invention, the raw materials used are commercially available products well known in the art, unless specifically described otherwise.
The deodorant passivating agent provided by the invention comprises 10-15% of heat escaping type deodorant, preferably 11-14%, more preferably 12-13% by weight. In the present invention, the heat-escaping type deodorant preferably comprises acetoxime and magnesium hydroxide, and the mass ratio of the acetoxime to the magnesium hydroxide is preferably 4:1. The thermal escaping type deodorant provided by the invention has a natural volatilization function under the condition that the temperature is higher than 40 ℃, especially the acetone oxime achieves the effect of neutralizing gas phase acid gas by gas phase, and the reaction between gas phase molecules is more sufficient.
The deodorant passivating agent provided by the invention comprises 8-10% of passivating agent, preferably 8.5-9.5% by weight. In the present invention, the passivating agent includes sodium sulfite and sodium nitrite; the mass ratio of the sodium sulfite to the sodium nitrite is preferably 3:1. According to the invention, the passivating agent can inactivate ferrous sulfide and ferric oxide, and oxygen absorption effect of sodium sulfite is utilized to form an anoxic environment in local choking, so that the effect of avoiding spontaneous combustion of ferrous sulfide and ferric oxide is achieved, the effect of sodium nitrite mainly stabilizes ferric oxide, iron oxide (rust) is prevented from participating in spontaneous combustion of ferrous sulfide, and meanwhile, the iron oxide-iron composite material has the effects of emulsification and dispersion.
The deodorizing and passivating agent provided by the invention comprises 6-8% of water-based corrosion inhibitor, preferably 6.5-7.5% by weight. In the present invention, the water-based corrosion inhibitor preferably includes sodium benzoate and sodium percarbonate; the mass ratio of the sodium benzoate to the sodium percarbonate is preferably 1:1. In the invention, sodium benzoate in the water-based slow release agent has a corrosion inhibition effect in an acidic environment formed by hydrogen sulfide; the sodium percarbonate has the function of locally decomposing oil stains and wrapping ferrous sulfide polymer groups, so that the complexing, decomposing, oxidizing and stripping functions are realized more thoroughly, and the function of efficiently preventing spontaneous combustion of ferrous sulfide is realized.
The deodorizing and passivating agent provided by the invention comprises 4-6% of gas-phase corrosion inhibitor, preferably 4.5-5.5% by weight. In the invention, the vapor phase corrosion inhibitor preferably comprises liquid ammonia and methylmorpholine, and the mass ratio of the liquid ammonia to the methylmorpholine is preferably 5:2. In the invention, the vapor phase corrosion inhibitor can inhibit hydrogen sulfide in the vapor phase from corroding equipment under the condition of water coexistence and avoid the formation of sulfuric acid.
The deodorizing passivating agent provided by the invention comprises the balance of water. In the present invention, the water is preferably demineralized water or tap water.
The invention provides a preparation method of the deodorizing passivating agent, which comprises the following steps: and mixing the heat escaping type deodorant, the passivating agent, the water-based corrosion inhibitor, the gas-phase corrosion inhibitor and water according to the composition of the deodorizing passivating agent to obtain the deodorizing passivating agent.
In the present invention, the mixing is preferably performed in an environment of 5 ℃ or higher. The invention is not particularly limited to the mixing, and the invention can achieve the purposes of uniform mixing and stable appearance of the solution. In the embodiment of the invention, the components are added into a stainless steel barrel, and are stirred by a stirrer, wherein the rotating speed of the stirrer is maintained at 50r/min, and the stirring time is 40min, so that the deodorizing passivating agent is obtained.
The invention provides application of the deodorizing passivating agent prepared by the scheme or the preparing method of the scheme in cleaning tower equipment of refining enterprises.
In the present invention, the column-like apparatus preferably includes an atmospheric column, a vacuum column, a preliminary distillation column, a fractionation column, a desorption column, a solvent regeneration column, or an sour water stripper.
In the present invention, the method of cleaning preferably comprises the steps of: the deodorization passivating agent is added into a circulating tank, the deodorization passivating agent in the circulating tank is heated to 60-80 ℃, the heated deodorization passivating agent is pumped into the top of the tower for spraying through a circulating pump, and the deodorization passivating agent automatically flows to the bottom of the tower and then enters the circulating tank; the circulating groove forms a closed circulating system with the top and the bottom of the tower.
The invention heats the deodorant passivating agent in the circulating tank to 60-80 ℃ to change the heat escaping type deodorant into gas phase, thereby realizing the purposes of neutralizing gas phase hydrogen sulfide toxic gas by an alkaline gas phase medicament and improving the removal efficiency of acid gas.
In the present invention, when the deodorizing and passivating agent is sprayed on the top of the tower, acetoxime in the deodorizing and passivating agent neutralizes acid gas in a gas phase; in addition, the magnesium hydroxide is sprayed in a 'vaporous' form from top to bottom in a dissolved state, and can also realize full contact reaction with hydrogen sulfide, mercaptan and thioether accumulated at the top of tower equipment in a 'gaseous' form with smaller specific gravity, so that the deodorizing effect is achieved. The main components of the passivating agent, namely sodium sulfite and sodium nitrite, are sprayed and flowed along with the spraying liquid at the middle and lower parts of a large amount of accumulated ferrous sulfide tower equipment, so that the effect of preventing ferrous sulfide passivation is realized, and the deodorizing of gas phase acid gas at the top of the equipment and the passivating function of ferrous sulfide at the middle and lower parts of the equipment can be realized without being divided into two steps.
The invention has no special requirements on the amount of spraying, and can be adjusted according to actual needs by a person skilled in the art.
In the present invention, the time for the washing is preferably 10 to 15 hours.
The circulation system established from top to bottom does not need to be filled with equipment bodies, circulation is established, the work purpose of eliminating residual hydrogen sulfide, mercaptan, thioether and other acid gases at the top of the tower can be realized after 10-15 hours of reaction, the dual function effects of preventing ferrous sulfide from spontaneous combustion in the tower and at the bottom of the tower are synchronously realized, and the personal injury accidents caused by exceeding of toxic gases in the overhaul environment caused by overflow of hydrogen sulfide and the equipment damage accidents caused by spontaneous combustion of ferrous sulfide are radically solved by a one-step method.
The deodorizing passivation agent, the preparation method and application thereof according to the present invention will be described in detail with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Placing the chemical agents in a special stainless steel barrel according to the weight ratio shown in the table 1, adding water for dilution, continuously stirring by a stirrer, maintaining the rotation speed of the stirrer at 50r/min for 40min until the appearance of the uniformly mixed solution is stable, standing for 60 min, and packaging to obtain the deodorizing passivating agent.
Table 1 composition (wt.%) of deodorant passivating agents of examples 1-5
Application examples 1 to 5
Connecting pipelines and valves of a circulating system with the tower body, and establishing a closed circulating system with the circulating tank;
adding water into a circulation tank, establishing circulation, testing leakage, preparing to add a medicament without leakage points, and timely treating the leakage points to achieve the purpose of no leakage;
the water phase temperature in the circulating tank is heated by steam, the temperature is raised to 70 ℃, the pump is started for circulation, and after the water returns, all the medicaments and the water are added according to the proportion of the table 1 within half an hour.
The cleaning agent circulates in a form of water drops and water curtain drops naturally from the top of the tower through self-flowing spraying, the deodorizing effect agent in the deodorizing passivating agent is heated to be in a gaseous state to fly upwards to the top of the tower, the deodorizing function is realized, the passivating effect agent is sprayed in the tower and the tower bottom part along with the liquid flow from top to bottom through the water curtain naturally formed by self-flowing, and effective passivating ferrous sulfide cleaning is performed.
The properties and cleaning effects of the deodorizing passivating agents prepared in examples 1 to 5 are shown in Table 2.
TABLE 2 Properties and cleaning Effect of deodorant passivating Agents prepared in examples 1 to 5
Note that: the cleaning rate and the hydrogen sulfide removal rate are different concepts, and the cleaning rate generally refers to residual (visible solid) dirt on the metal surface, and is described in GB/T25146-2010 "chemical cleaning quality acceptance Specification".
From the results of table 2, it is understood that the deodorizing and passivating agent of the present invention can achieve both deodorizing and passivating effects in one step.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (10)
1. The deodorizing passivating agent is characterized by comprising the following components in percentage by weight: 10-15% of heat escaping type deodorant, 8-10% of passivating agent, 6-8% of water-based corrosion inhibitor, 4-6% of vapor phase corrosion inhibitor and the balance of water;
the heat escaping type deodorant comprises acetoxime and magnesium hydroxide;
the passivating agent comprises sodium sulfite and sodium nitrite.
2. The deodorant passivating agent according to claim 1, characterized in that the mass ratio of acetoxime to magnesium hydroxide is 4:1.
3. The deodorant passivating agent according to claim 1, characterized in that the mass ratio of sodium sulfite to sodium nitrite is 3:1.
4. The deodorant passivating agent according to claim 1, characterized in that said water-based corrosion inhibitor comprises sodium benzoate and sodium percarbonate; the mass ratio of the sodium benzoate to the sodium percarbonate is 1:1.
5. The deodorant passivating agent according to claim 1, characterized in that the vapor phase corrosion inhibitor comprises liquid ammonia and methylmorpholine, and the mass ratio of the liquid ammonia to the methylmorpholine is 5:2.
6. The deodorant passivating agent according to claim 1, characterized in that the water is demineralized water or tap water.
7. The method for preparing the deodorizing and passivating agent as defined in any one of claims 1 to 6, characterized by comprising the following steps: and mixing the heat escaping type deodorant, the passivating agent, the water-based corrosion inhibitor, the gas-phase corrosion inhibitor and water according to the composition of the deodorizing passivating agent to obtain the deodorizing passivating agent.
8. The use of the deodorant passivating agent according to any one of claims 1-6 or the deodorant passivating agent prepared by the preparation method of claim 7 in cleaning tower equipment of a refining enterprise.
9. The use according to claim 8, wherein the method of cleaning comprises the steps of:
pumping the deodorizing passivating agent into the tower top through a circulating pump for spraying, automatically flowing to the bottom of the tower, and then entering a circulating tank outside the tower; heating the circulating tank to 60-80 ℃, and forming a circulating system with the top and the bottom of the circulating tank.
10. The use according to claim 9, wherein the time of the washing is 10-15 hours.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3951754A (en) * | 1974-02-19 | 1976-04-20 | Liakumovich Alexandr Grigoriev | Method of inhibiting the thermopolymerization of isoprene and butadiene |
| JP2004143417A (en) * | 2002-08-30 | 2004-05-20 | National Cardiovascular Center | Titanium oxide complex, method for producing the same and medical material by using the same |
| CN102634423A (en) * | 2012-03-21 | 2012-08-15 | 王春玲 | Deodorizing and passivating cleaning agent for oil refining devices |
| CN110983760A (en) * | 2019-12-24 | 2020-04-10 | 南通赛晖科技发展股份有限公司 | Preparation method of multifunctional one-way moisture-conducting cotton fabric |
| CN114405248A (en) * | 2021-12-16 | 2022-04-29 | 北京大爱乾坤环卫设备集团有限公司 | Heat-volatilization type plant deodorant |
-
2023
- 2023-03-28 CN CN202310309205.7A patent/CN116240051A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3951754A (en) * | 1974-02-19 | 1976-04-20 | Liakumovich Alexandr Grigoriev | Method of inhibiting the thermopolymerization of isoprene and butadiene |
| JP2004143417A (en) * | 2002-08-30 | 2004-05-20 | National Cardiovascular Center | Titanium oxide complex, method for producing the same and medical material by using the same |
| CN102634423A (en) * | 2012-03-21 | 2012-08-15 | 王春玲 | Deodorizing and passivating cleaning agent for oil refining devices |
| CN110983760A (en) * | 2019-12-24 | 2020-04-10 | 南通赛晖科技发展股份有限公司 | Preparation method of multifunctional one-way moisture-conducting cotton fabric |
| CN114405248A (en) * | 2021-12-16 | 2022-04-29 | 北京大爱乾坤环卫设备集团有限公司 | Heat-volatilization type plant deodorant |
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