CN106434010A - Cleaning formulation for convection zone furnace tube of cracking furnace - Google Patents
Cleaning formulation for convection zone furnace tube of cracking furnace Download PDFInfo
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- CN106434010A CN106434010A CN201610722953.8A CN201610722953A CN106434010A CN 106434010 A CN106434010 A CN 106434010A CN 201610722953 A CN201610722953 A CN 201610722953A CN 106434010 A CN106434010 A CN 106434010A
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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
- C11D1/66—Non-ionic compounds
- C11D1/72—Ethers of polyoxyalkylene glycols
- C11D1/721—End blocked 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
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/825—Mixtures of compounds all of which are non-ionic
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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
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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
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/10—Carbonates ; Bicarbonates
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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
- C11D3/16—Organic compounds
- C11D3/26—Organic compounds containing nitrogen
- C11D3/33—Amino carboxylic acids
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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
- C11D3/16—Organic compounds
- C11D3/37—Polymers
- C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C11D3/3757—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions
- C11D3/3765—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions in liquid compositions
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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
- C11D9/00—Compositions of detergents based essentially on soap
- C11D9/02—Compositions of detergents based essentially on soap on alkali or ammonium soaps
-
- 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
-
- 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
- C11D1/74—Carboxylates or sulfonates esters of polyoxyalkylene glycols
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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)
- Inorganic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention provides a cleaning formulation for the convection zone furnace tube of a cracking furnace. The cleaning formulation comprises a pre-cleaning agent, a cleaning agent and a rinsing agent. The pre-cleaning agent consists of a penetrating agent, a wetting agent, a corrosion inhibitor and water as the balance thereof. The cleaning agent consists of a detergent, an oil dispersing agent, a first additive, a second additive, a surfactant, a defoaming agent, a chelating agent, a corrosion inhibitor and water as the balance thereof. The rinsing agent consists of a release agent, a corrosion inhibitor and water as the balance thereof. The present invention also provides a preparation method for preparing the pre-cleaning agent, the cleaning agent and the rinsing agent in the cleaning formulation for the convection zone furnace tube of the cracking furnace. The above cleaning formulation for the convection zone furnace tube of the cracking furnace is efficient, safe, simple in component, convenient in preparation, low in cost, and free of environmental pollution. The exhaust gas temperature of the cracking furnace is reduced. Meanwhile, the thermal efficiency of the cracking furnace is improved.
Description
Technical field
The present invention relates to petrochemical technology field, particularly relate to the cleaning formulation of Convection Tube of A Cracking Furnace.
Background technology
Pyrolysis furnace is one of main energy consumption equipment of ethylene unit, after long-term operation, heating tube in section of convection chamber appearance has accumulated a large amount of dirts, cause exhanst gas outlet temperature to raise, reduce the thermal efficiency of pyrolysis furnace. removing boiler tube appearance dirt is a kind of effective way that improves the pyrolysis furnace thermal efficiency. the general Dry ice cleaning that adopts in the past, but Dry ice cleaning expense is high, and difficulty of construction is large, clean dead angle many.
Summary of the invention
Based on this, be necessary for the problem existing in background technology, cleaning formulation cheap, that can effectively remove the Convection Tube of A Cracking Furnace of pyrolysis furnace appearance dirt for a kind of cleaning charge is provided.
In addition, the present invention also provides the preparation method of prerinse agent in a kind of cleaning formulation of Convection Tube of A Cracking Furnace, cleaning agent and irrigation.
A cleaning formulation for Convection Tube of A Cracking Furnace, comprises prerinse agent, cleaning agent and irrigation;
Described prerinse agent, in quality percentage composition, composed of the following components:
Bleeding agent 0.5% ~ 1.0%;
Wetting agent 0.5% ~ 1.0%;
Corrosion inhibiter 0.25% ~ 0.75%; And
The water of surplus;
Described cleaning agent, in quality percentage composition, composed of the following components:
Detergent 0.2% ~ 0.5%;
Oil dispersant 0.1% ~ 0.3%;
The first auxiliary agent 0.05% ~ 0.1%;
The second auxiliary agent 0.05% ~ 0.1%
Surfactant 0.1% ~ 0.3%;
Defoamer 0.05% ~ 0.1%;
Chelating agent 0.4% ~ 0.5%;
Corrosion inhibiter 0.25% ~ 0.75%; And
The water of surplus;
Described irrigation, in quality percentage composition, composed of the following components:
Remover 0.5% ~ 1.0%;
Corrosion inhibiter 0.25% ~ 0.75%; And
The water of surplus.
In an embodiment, in quality percentage composition, described prerinse agent is composed of the following components therein:
Bleeding agent 0.8% ~ 0.9%;
Wetting agent 0.7% ~ 0.8%;
Corrosion inhibiter 0.3% ~ 0.5%; And
The water of surplus.
Wherein in one embodiment, in terms of weight/mass percentage composition, the cleaning agent is composed of the following components：
Detergent 0.3% ~ 0.4%;
Oil dispersant 0.2% ~ 0.3%;
First auxiliary agent 0.06% ~ 0.08%；
The second auxiliary agent 0.06% ~ 0.08%
Surfactant 0.2%；
Defoamer 0.05% ~ 0.06%;
Chelating agent 0.4% ~ 0.5%;
Corrosion inhibiter 0.4% ~ 0.6%; And
The water of surplus.
In an embodiment, in quality percentage composition, described irrigation is composed of the following components therein:
Remover 0.8% ~ 1.0%；
Corrosion inhibiter 0.3% ~ 0.4%; And
The water of surplus.
Therein in an embodiment, described bleeding agent is AEO, in secondary octyl APEO a kind of or both mixture, described wetting agent is maleic acid-acrylic acid copolymer, acrylic acid-hydroxypropyl acrylate copolymer in a kind of or both mixture, described corrosion inhibiter is Lan-826 or methenamine, described detergent is the poly-second two of methoxyl group Alcohol, the oil dispersant are polypropylene glycol, and first auxiliary agent is soda ash, and second auxiliary agent is sodium bicarbonate, and the surface is lived property agent is polyoxyethylene sorbitan carboxylic ester, described defoamer is polyethers, described chelating agent is ethylenediamine tetra-acetic acid two sodium, described remover is dodecyl fatty acid.
A kind of preparation method of the cleaning formulation of above-mentioned Convection Tube of A Cracking Furnace, comprises the following steps：
Prepare prerinse agent；
Prepare cleaning agent；
Prepare irrigation.
The preparation method of the prerinse agent, comprises the following steps：
Prepare bleeding agent, wetting agent, corrosion inhibiter and water according to mass percent；
Water is added stirred tank, stirring slurry is opened；
Bleeding agent, wetting agent and corrosion inhibiter is sequentially added in water；
Mix 0.5 ~ 1 hour, then stand 5 ~ 10 minutes, get product.
The preparation method of the cleaning agent, comprises the following steps：
Prepare detergent, oil dispersant, the first auxiliary agent, the second auxiliary agent, surfactant, defoamer, chela according to mass percent
Mixture, corrosion inhibiter and water；
Water is added stirred tank, stirring slurry is opened；
Detergent, oil dispersant, the first auxiliary agent, the second auxiliary agent, surfactant, defoamer, chelating agent is sequentially added in water
And corrosion inhibiter；
Mix 0.5 ~ 1 hour, then stand 5 ~ 10 minutes, get product.
The preparation method of the irrigation, comprises the following steps：
Prepare remover, corrosion inhibiter and water according to mass percent;
Water is added to stirred tank, open stirring arm;
Remover and corrosion inhibiter is sequentially added in water；
Mix 0.5 ~ 1 hour, then stand 5 ~ 10 minutes, get product.
Of the invention efficiently, safety, component are simple, prepare convenient, cheap, environmentally safe, can significantly reduce second alkene device pyrolysis furnace exhaust gas temperature. the present invention will be by special nozzle on cleaning equipment prerinse agent, cleaning agent, irrigation is complied with The secondary Convection Tube of A Cracking Furnace outer surface that is injected into is cleaned, and can remove more than 95% Convection Tube of A Cracking Furnace appearance product Tired dirt, so as to improving cracking furnace thermal efficiency, reducing exhaust gas temperature, reduce fuel consumption.
Specific embodiment
Understandable for enabling the above objects, features and advantages of the present invention to become apparent from, below to concrete reality of the invention
The mode of applying is described in detail.Elaborate a lot of details in order to fully understanding the present invention in the following description.But
The present invention can be implemented with being much different from alternate manner described here, and those skilled in the art can be without prejudice to this
Similar improvement is done in the case of bright intension, and therefore the present invention is not embodied as being limited by following public.
A cleaning formulation for Convection Tube of A Cracking Furnace, comprises prerinse agent, cleaning agent and irrigation.
Wherein, prerinse agent is by the bleeding agent of 0.5% ~ 1.0% weight/mass percentage composition, 0.5% ~ 1.0% weight/mass percentage composition
Wetting
The water composition of agent, the corrosion inhibiter of 0.25% ~ 0.75% weight/mass percentage composition and surplus.
Detergent of the cleaning agent by 0.2% ~ 0.5% weight/mass percentage composition, the oil dispersed of 0.1% ~ 0.3% weight/mass percentage composition Agent, the first auxiliary agent of 0.05% ~ 0.1% weight/mass percentage composition, the second auxiliary agent of 0.05% ~ 0.1% weight/mass percentage composition, 0.1% ~ The surfactant of 0.3% weight/mass percentage composition, the defoamer of 0.05% ~ 0.1% weight/mass percentage composition, 0.4% ~ 0.5% mass percentage the chelating agent of content, 0.25% ~ 0.75% corrosion inhibiter of quality percentage composition and the water of surplus composition.
Remover of the irrigation by 0.5% ~ 1.0% weight/mass percentage composition, the corrosion inhibiter of 0.25% ~ 0.75% weight/mass percentage composition
Constitute with the water of surplus.
Preferably, bleeding agent, 0.7% ~ 0.8% weight/mass percentage composition of the prerinse agent by 0.8% ~ 0.9% weight/mass percentage composition
Profit
The water composition of humectant, the corrosion inhibiter of 0.3% ~ 0.5% weight/mass percentage composition and surplus.
Preferably, cleaning agent is by the detergent of 0.3% ~ 0.4% weight/mass percentage composition, 0.2% ~ 0.3% weight/mass percentage composition
Oil dispersant, the first auxiliary agent of 0.06% ~ 0.08% weight/mass percentage composition, the second auxiliary agent of 0.06% ~ 0.08% weight/mass percentage composition,
The surfactant of 0.2% weight/mass percentage composition, the defoamer of 0.05% ~ 0.06% weight/mass percentage composition, 0.4% ~ 0.5% mass hundred
Divide the water composition of the chelating agent, the corrosion inhibiter of 0.4% ~ 0.6% weight/mass percentage composition and surplus of content.
Preferably, irrigation is by the remover of 0.8% ~ 1.0% weight/mass percentage composition, 0.3% ~ 0.4% weight/mass percentage composition
The water composition of corrosion inhibiter and surplus.
Wherein, bleeding agent be AEO, a kind of or both the mixture in secondary octyl APEO.
Wetting agent is maleic acid-acrylic acid copolymer, a kind of or both the mixture in acrylic acid-acrylic acid hydroxypropyl ester copolymer.
Corrosion inhibiter is Lan-826 or methenamine.
Detergent is methoxy poly (ethylene glycol).Oil dispersant is polypropylene glycol.First auxiliary agent is soda ash.Second auxiliary agent is little
Soda.Surfactant is polyoxyethylene sorbitan carboxylic ester.Defoamer is polyethers.Chelating agent is ethylenediamine tetra-acetic acid
Disodium.
Remover is dodecyl fatty acid.
It should be noted that the cleaning formulation of above-mentioned Convection Tube of A Cracking Furnace can be used for outside other type of furnace convection tube tops
The removing of table dirt.
The cleaning formulation of above-mentioned Convection Tube of A Cracking Furnace, including prerinse agent, cleaning agent and irrigation, recipe ingredient letter
Single, cheap, environmentally safe, Furnace of Ethylene Cracking Plant exhaust gas temperature can be significantly reduced；More than 95% cracking can be removed
The dirt of stove heating tube in section of convection chamber appearance accumulation, so that improve cracking furnace thermal efficiency；Reduce exhaust gas temperature；Reduce fuel consumption.
A kind of preparation method of the cleaning formulation of above-mentioned Convection Tube of A Cracking Furnace, comprises the following steps：
Prepare prerinse agent；
Prepare cleaning agent；
Prepare irrigation.
Wherein, the preparation method of prerinse agent, comprises the following steps：
Prepare bleeding agent, wetting agent, corrosion inhibiter and water according to mass percent；
Water is added stirred tank, stirring slurry is opened；
Bleeding agent, wetting agent and corrosion inhibiter is sequentially added in water；
Mix 0.5 ~ 1 hour, then stand 5 ~ 10 minutes, get product.
The preparation method of cleaning agent, comprises the following steps：
Prepare detergent, oil dispersant, the first auxiliary agent, the second auxiliary agent, surfactant, defoamer, chela according to mass percent
Mixture, corrosion inhibiter and water.
Water is added stirred tank, stirring slurry is opened.
Detergent, oil dispersant, the first auxiliary agent, the second auxiliary agent, surfactant, defoamer, chela is sequentially added in water
Mixture and corrosion inhibiter.
Mix 0.5 ~ 1 hour, then stand 5 ~ 10 minutes, get product.
The preparation method of irrigation, comprises the following steps：
Prepare remover, corrosion inhibiter and water according to mass percent.
Water is added stirred tank, stirring slurry is opened.
Remover and corrosion inhibiter is sequentially added in water.
Mix 0.5 ~ 1 hour, then stand 5 ~ 10 minutes, get product.
In the cleaning formulation of above-mentioned Convection Tube of A Cracking Furnace, the preparation method of prerinse agent, cleaning agent and irrigation is very
Simply, prepare easily.
It is below specific embodiment.
Embodiment 1
（1）The preparation of prerinse agent：Prepare secondary octyl APEO, acrylic acid-acrylic acid hydroxypropyl acrylate according to mass percent
Copolymer, Lan-826 corrosion inhibiter and water, in stirred tank add 1000 water, open stirring slurry, be sequentially added into 8 Zhong Xin
Base APEO, 7 acrylic acid-acrylics acid hydroxypropyl ester copolymer, 3 Lan-826 corrosion inhibiter, mix 0.5 hour, quiet
Put 5 minutes, obtain final product prerinse agent, the prerinse agent is colourless troubled liquor.
（2）The preparation of cleaning agent：Prepare methoxy poly (ethylene glycol), polypropylene glycol, soda ash, little Su according to mass percent
Beat, polyoxyethylene sorbitan carboxylic ester, polyethers, disodium ethylene diamine tetraacetate, Lan-826 corrosion inhibiter and water, in stirred tank
Interior plus 1000 water, open stirring slurry, be sequentially added into 3 methoxy poly (ethylene glycol)s, 2 polypropylene glycols, 0.8 soda ash,
0.8 sodium bicarbonate, 2 polyoxyethylene sorbitan carboxylic esters, 0.5 polyethers, 5 disodium ethylene diamine tetraacetates, 5 Lan-
826 corrosion inhibiter, mix 1 hour, stand 10 minutes, that is, cleaning agent is obtained, and the cleaning agent is colourless muddy thick liquid.
（3）The preparation of irrigation：Prepare dodecyl sodium soap, Lan-826 corrosion inhibiter and water according to mass percent,
Add 1000 water in stirred tank, open stirring slurry, be sequentially added into 10 dodecyl sodium soaps, 3 Lan-826 and delay
Erosion agent, mixes 0.5 hour, stands 5 minutes, that is, irrigation is obtained, and the irrigation is colourless troubled liquor.
The cleaning formulation of Convection Tube of A Cracking Furnace includes above-mentioned prerinse agent, cleaning agent and irrigation, is set by cleaning
Standby upper special nozzle is implanted sequentially Convection Tube of A Cracking Furnace outer surface prerinse agent, cleaning agent, irrigation and is cleaned.
The cleaning formulation cleaning Convection Tube of A Cracking Furnace of above-mentioned Convection Tube of A Cracking Furnace, data analysis are as shown in table 1：
The cleaning formulation cleaning Convection Tube of A Cracking Furnace nominal time data analysis of 1 Convection Tube of A Cracking Furnace of table
| Time started | End time | |
| Demarcate before cleaning | August 8 days 10 in 2013:00 | August 10 days 10:00 |
| Demarcate after cleaning | September 5 days 12 in 2013:00 | September 8 days 12:00 |
Before and after the cleaning formulation of Convection Tube of A Cracking Furnace is cleaned during demarcating, relevant parameter is shown in Table 2.
Relevant parameter before and after cleaning during the cleaning formulation demarcation of 2 Convection Tube of A Cracking Furnace of table
| Design load | Before cleaning | After cleaning | |
| Total amount of heat（Kcal/h） | 20.38×106 | 22.37×106 | 21.58×106 |
| Total caloric receptivity（Kcal/h） | 18.34×106 | 18.34×106 | 18.34×106 |
| Exhaust gas temperature（℃） | 200 | 275 | 235 |
| The thermal efficiency（%） | 90.0 | 82.3 | 85.4 |
| Fuel gas is consumed（kg/h） | 704 | 773 | 717 |
The thermal efficiency before cleaning in table 2（%）With 275 DEG C of exhaust gas temperature, flue gas contains O2For 3.5%, it is 0 containing CO, chimney not over-emitting black exhaust meter
Calculate gained.
The thermal efficiency after cleaning in table 2（%）With 235 DEG C of exhaust gas temperature, flue gas contains O2For 3.5%, it is 0 containing CO, chimney does not emit black
Cigarette calculates gained.
In table 2, cracking stock is naphtha.
From table 2 it can be seen that cleaned with the cleaning formulation of Convection Tube of A Cracking Furnace after heating tube in section of convection chamber outer surface dirt,
The fuel consumption of pyrolysis furnace can be reduced, the exhaust gas temperature of pyrolysis furnace can be reduced, cracking furnace thermal efficiency 3.1% can be improved.Per
Fuel gas 56kg saved per hour by platform stove, is calculated within 8000 hours with whole year operation and 6000 yuan/ton of calculating of fuel gas, is split per platform
Producible economic benefit after solution stove cleaning：0.056 × 6000 × 8000=3688000 units=3,130,000 yuan, economic benefit very may be used
See.
Embodiment 2
（1）The preparation of prerinse agent：Prepare secondary octyl APEO, acrylic acid-acrylic acid hydroxypropyl acrylate according to mass percent
Copolymer, Lan-826 corrosion inhibiter and water, in stirred tank add 1000 water, open stirring slurry, be sequentially added into 8 Zhong Xin
Base APEO, 7 acrylic acid-acrylics acid hydroxypropyl ester copolymer, 3 Lan-826 corrosion inhibiter, mix 0.5 hour, quiet
Put 5 minutes, obtain final product prerinse agent, the prerinse agent is colourless troubled liquor.
（2）The preparation of cleaning agent：Prepare methoxy poly (ethylene glycol), polypropylene glycol, soda ash, little Su according to mass percent
Beat, polyoxyethylene sorbitan carboxylic ester, polyethers, disodium ethylene diamine tetraacetate, Lan-826 corrosion inhibiter and water, in stirred tank
Interior plus 1000 water, open stirring slurry, be sequentially added into 3 methoxy poly (ethylene glycol)s, 2 polypropylene glycols, 0.8 soda ash,
0.8 sodium bicarbonate, 2 polyoxyethylene sorbitan carboxylic esters, 0.5 polyethers, 5 disodium ethylene diamine tetraacetates, 5 Lan-
826 corrosion inhibiter, mix 1 hour, stand 10 minutes, that is, cleaning agent is obtained, and the cleaning agent is colourless muddy thick liquid.
（3）The preparation of irrigation：Prepare dodecyl sodium soap, Lan-826 corrosion inhibiter and water according to mass percent,
Add 1000 water in stirred tank, open stirring slurry, be sequentially added into 10 dodecyl sodium soaps, 3 Lan-826 and delay
Erosion agent, mixes 0.5 hour, stands 5 minutes, that is, irrigation is obtained, and the irrigation is colourless troubled liquor.
The cleaning formulation of Convection Tube of A Cracking Furnace includes above-mentioned prerinse agent, cleaning agent and irrigation, is set by cleaning
Standby upper special nozzle is implanted sequentially Convection Tube of A Cracking Furnace outer surface prerinse agent, cleaning agent, irrigation and is cleaned.
Before and after cleaning during being demarcated using the cleaning formulation of Convection Tube of A Cracking Furnace, relevant parameter is shown in Table 3.
Relevant parameter before and after cleaning during the cleaning formulation demarcation of 3 Convection Tube of A Cracking Furnace of table
| Before cleaning | After cleaning | |
| Exhaust gas temperature（℃） | 125.49 | 106.91 |
| BFW preheating temperatures（℃） | 206.2 | 193.02 |
| The temperature difference（℃） | 80.71 | 86.11 |
| Inlet amount（t/h） | 12197.68 | 12174.38 |
| C2/C3 is measured | 1441.98 | 1324.22 |
| Across temperature（℃） | 588.15 | 556.89 |
| The upper water yields of BFW（m³/h） | 16190.87 | 16415.82 |
| ES is measured | 16034.98 | 15956.8 |
| ES spray water fluxs (kg/h) | 693.4 | 742.68 |
| Dome temperature（℃） | 1032.72 | 989.61 |
As can be seen from Table 3：After the cleaning formulation cleaning convection section in cracking furnace of Convection Tube of A Cracking Furnace, suitable in inlet amount
In the case of, exhaust gas temperature have dropped 18.58 DEG C, and the thermal efficiency of pyrolysis furnace accordingly rises 1.09%.On BFW, the water yield increases, cigarette
In the case of gas temperature drop, BFW preheating temperatures are improved to 86.11 by original 80.71 DEG C on the contrary with the temperature difference of exhaust gas temperature
DEG C, illustrate that the heat transfer effect of BFW preheating coil pipes is significantly improved.Reduce in flue-gas temperature, in the case that ES yield is suitable, desuperheating water
Amount rises 49.28kg/h on the contrary, illustrates that ES crosses the heat transfer effect of hot coil and improves.
Embodiment 1,2 results show：Before cleaning, pyrolysis furnace exhaust gas temperature is higher, and the thermal efficiency of pyrolysis furnace is low, and cracking is described
After the cleaning formulation cleaning pyrolysis furnace of stove heating tube in section of convection chamber, the exhaust gas temperature of pyrolysis furnace can be reduced, and improve the heat of pyrolysis furnace
Efficiency.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (9)
1. a kind of cleaning formulation of Convection Tube of A Cracking Furnace, it is characterised in that including prerinse agent, cleaning agent and irrigation；
The prerinse agent, in terms of weight/mass percentage composition, composed of the following components：
Bleeding agent 0.5% ~ 1.0%；
Wetting agent 0.5% ~ 1.0%；
Corrosion inhibiter 0.25% ~ 0.75%；And
The water of surplus；
The cleaning agent, in terms of weight/mass percentage composition, composed of the following components：
Detergent 0.2% ~ 0.5%；
Oil dispersant 0.1% ~ 0.3%；
First auxiliary agent 0.05% ~ 0.1%；
Second auxiliary agent 0.05% ~ 0.1%
Surfactant 0.1% ~ 0.3%；
Defoamer 0.05% ~ 0.1%；
Chelating agent 0.4% ~ 0.5%；
Corrosion inhibiter 0.25% ~ 0.75%；And
The water of surplus；
The irrigation, in terms of weight/mass percentage composition, composed of the following components：
Remover 0.5% ~ 1.0%；
Corrosion inhibiter 0.25% ~ 0.75%；And
The water of surplus.
2. the cleaning formulation of Convection Tube of A Cracking Furnace according to claim 1, it is characterised in that with weight/mass percentage composition
Meter, the prerinse agent are composed of the following components：
Bleeding agent 0.8% ~ 0.9%；
Wetting agent 0.7% ~ 0.8%；
Corrosion inhibiter 0.3% ~ 0.5%；And
The water of surplus.
3. the cleaning formulation of Convection Tube of A Cracking Furnace according to claim 1, it is characterised in that with weight/mass percentage composition
Meter, the cleaning agent are composed of the following components：
Detergent 0.3% ~ 0.4%；
Oil dispersant 0.2% ~ 0.3%；
First auxiliary agent 0.06% ~ 0.08%；
Second auxiliary agent 0.06% ~ 0.08%
Surfactant 0.2%；
Defoamer 0.05% ~ 0.06%；
Chelating agent 0.4% ~ 0.5%；
Corrosion inhibiter 0.4% ~ 0.6%；And
The water of surplus.
4. the cleaning formulation of Convection Tube of A Cracking Furnace according to claim 1, it is characterised in that with weight/mass percentage composition
Meter, the irrigation are composed of the following components：
Remover 0.8% ~ 1.0%；
Corrosion inhibiter 0.3% ~ 0.4%；And
The water of surplus.
5. the cleaning formulation of Convection Tube of A Cracking Furnace according to claim 1, it is characterised in that the bleeding agent is fat
A kind of or both mixture in fat alcohol APEO, secondary octyl APEO, the wetting agent are maleic acid-propylene
A kind of or both mixture in acid copolymer, acrylic acid-acrylic acid hydroxypropyl ester copolymer, the corrosion inhibiter is Lan-826
Or methenamine, the detergent is methoxy poly (ethylene glycol), and the oil dispersant is polypropylene glycol, and first auxiliary agent is pure
Alkali, second auxiliary agent are sodium bicarbonate, and the surfactant is polyoxyethylene sorbitan carboxylic ester, and the defoamer is
Polyethers, the chelating agent are disodium ethylene diamine tetraacetate, and the remover is dodecyl fatty acid.
6. the preparation method of the cleaning formulation of the Convection Tube of A Cracking Furnace described in a kind of claim 1, it is characterised in that include
Following steps：
Prepare prerinse agent；
Prepare cleaning agent；
Prepare irrigation.
7. the preparation method of the cleaning formulation of Convection Tube of A Cracking Furnace according to claim 6, it is characterised in that described
Prerinse agent preparation method is comprised the following steps：
Prepare bleeding agent, wetting agent, corrosion inhibiter and water according to mass percent；
Water is added stirred tank, stirring slurry is opened；
Bleeding agent, wetting agent and corrosion inhibiter is sequentially added in water；
Mix 0.5 ~ 1 hour, then stand 5 ~ 10 minutes, get product.
8. the preparation method of the cleaning formulation of Convection Tube of A Cracking Furnace according to claim 6, it is characterised in that described
Cleaning agent preparation method is comprised the following steps：
Prepare detergent, oil dispersant, the first auxiliary agent, the second auxiliary agent, surfactant, defoamer, chela according to mass percent
Mixture, corrosion inhibiter and water；
Water is added stirred tank, stirring slurry is opened；
Detergent, oil dispersant, the first auxiliary agent, the second auxiliary agent, surfactant, defoamer, chelating agent is sequentially added in water
And corrosion inhibiter；
Mix 0.5 ~ 1 hour, then stand 5 ~ 10 minutes, get product.
9. the preparation method of the cleaning formulation of Convection Tube of A Cracking Furnace according to claim 6, it is characterised in that described
Irrigation preparation method is comprised the following steps：
Prepare remover, corrosion inhibiter and water according to mass percent；
Water is added stirred tank, stirring slurry is opened；
Remover and corrosion inhibiter is sequentially added in water；
Mix 0.5 ~ 1 hour, then stand 5 ~ 10 minutes, get product.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610722953.8A CN106434010A (en) | 2016-08-26 | 2016-08-26 | Cleaning formulation for convection zone furnace tube of cracking furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610722953.8A CN106434010A (en) | 2016-08-26 | 2016-08-26 | Cleaning formulation for convection zone furnace tube of cracking furnace |
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| Publication Number | Publication Date |
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| CN106434010A true CN106434010A (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610722953.8A Pending CN106434010A (en) | 2016-08-26 | 2016-08-26 | Cleaning formulation for convection zone furnace tube of cracking furnace |
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| CN107604274A (en) * | 2016-07-11 | 2018-01-19 | 中国石油化工股份有限公司 | Processing method, thus obtained pyrolysis furnace nichrome boiler tube and the method for producing ethene of pyrolysis furnace nichrome boiler tube |
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Application publication date: 20170222 |