CN106051799B - A kind of cleaning method of the efficient scale removal of oil field boiler convection section - Google Patents
A kind of cleaning method of the efficient scale removal of oil field boiler convection section Download PDFInfo
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- CN106051799B CN106051799B CN201610388376.3A CN201610388376A CN106051799B CN 106051799 B CN106051799 B CN 106051799B CN 201610388376 A CN201610388376 A CN 201610388376A CN 106051799 B CN106051799 B CN 106051799B
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- incrustation
- convection section
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- cleaning
- corrosion inhibiter
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Detergent Compositions (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The present invention relates to a kind of cleaning method of the efficient scale removal of oil field boiler convection section.The cleaning method comprises the following steps：Spray bleeding agent, sprinkling corrosion inhibiter and high pressure washing.The cleaning method first loosens the incrustation using chemical reagent, and then incrustation is rinsed with containing the current for neutralizing cleaning agent, reduce the pressure and flow of high pressure water flow, so as to significantly reduce damage of the cleaning process to convection section, the elimination efficiency to incrustation is effectively increased at the same time, simultaneously because incrustation is acidic materials, the acidic liquid formed during chemical reagent neutralising flush is added, is reduced in cleaning process to the chemical damage of convection section.
Description
Technical field
The invention belongs to oil field equipment to clean field, and in particular to a kind of cleaning side of the efficient scale removal of oil field boiler convection section
Method.
Background technology
The long-term oil firing of uphole steam generator, in operation there are incomplete combustion, less than a variety of situations such as dew point operation, day
The product moon, which tires out, causes the serious dust stratification problem of convection section (heating surface), and fin dust stratification is hard, it is difficult to handles.Incrustation causes flue to hinder
Plug, heat transfer effect are poor, severely impact performance driving economy and security.
Currently, oil field boiler convection section is accumulated using means such as dry ice blasting, sandblasting, compressed air, manual cleanings
Dirt is removed, and effect is poor；Certainly, also have and directly the convection section is cleaned using giant, but due to incrustation
Complicated component is hard, it is difficult to removes, the high pressure of direct voltage jet stream can cause to damage to equipment, while high pressrue jet apparatus needs
Man-hour manually hand-held spray gun, recoil strength caused by high pressure water flow is big, not easy to operate.
To sum up, a kind of high-efficient cleaning is urgently developed except the cleaning method of oil field boiler convection section incrustation.
The content of the invention
In order to solve the above problem existing in the prior art, the present invention provides a kind of efficient scale removal of oil field boiler convection section
Cleaning method, the cleaning method first loosens the incrustation using chemical reagent, and then with containing neutralizing cleaning agent
Current incrustation is rinsed, the pressure and flow of high pressure water flow are reduced, so as to significantly reduce cleaning process to convection current
The damage of section, while effectively increase the elimination efficiency to incrustation.Since Sulfur content in Fuel Oil content is higher, burning generation SO2,
The relatively low acid complex salt of fusing point is formed under high temperature with metal oxide (such as iron oxide)；Condense on low temperature heating surface, shape
Heating surface is loosened into acid and adheres to the ash content in flue gas, and gradually accumulation forms hard incrustation.
Present inventor, is detected analysis, testing result is as shown in table 1 to the component of incrustation first.
Table 1：Incrustation composition detection table：
By the constituent analysis to incrustation, present inventor, which designs, first carries out the incrustation using chemical reagent
Loosen, and then the cleaning method being rinsed with the current containing neutralization cleaning agent to incrustation, from upper table, it can be seen that in incrustation
Contain 45.41% SO3With a large amount of metallic elements, strong acid weak base salting liquid can be formed after meeting water, and then to convection section generationization
Corrosion is learned, the cleaning method adds the acidic liquid formed during chemical reagent neutralising flush, reduces in cleaning process to right
Flow the chemical damage of section.
The technical solution adopted in the present invention is：A kind of cleaning method of the efficient scale removal of oil field boiler convection section, including with
Lower step：
A, bleeding agent is sprayed：Bleeding agent is sprayed on convection section incrustation, micropore occurs in incrustation after standing；
B, corrosion inhibiter is sprayed：Corrosion inhibiter is sprayed on incrustation；
C, high pressure washing：The high pressure water flow for neutralizing cleaning agent using carrying is rinsed incrustation, i.e. complete after flushing
Into scale removal process.
To improve cleaning efficiency, before step A, floating grey step is also removed：Remove the floating ash inside convection section.
For the serious convection section of some incrustation, it is possible to use repeated method, such as：
A kind of cleaning method of the efficient scale removal of oil field boiler convection section, comprises the following steps：
A, bleeding agent is sprayed：Bleeding agent is sprayed on convection section incrustation, micropore occurs in incrustation after standing；
B, corrosion inhibiter is sprayed：Corrosion inhibiter is sprayed on incrustation；
C, high pressure washing：The high pressure water flow for neutralizing cleaning agent using carrying is rinsed incrustation；
D, check and repeat：Convection section is checked, if incrustation is not removed totally, repeat step A, B and C, until incrustation
It is rinsed clean.
To slow down the loosening speed of the convection section, after incrustation is rinsed totally, passivator step is also sprayed：To convection current
Section heating surface sprinkling passivator.
After spraying passivator step, there is spraying-rinsing step：Convection section is cleaned using clear water.
In the present invention, the pressure of the high pressure water flow is less than 50MPa, and flow is less than 1.5m3/h.Because chemistry is used
Solvent in advance loosens incrustation, without using excessive water flow pressure in cleaning process, reduces cleaning process to right
Flow the convenience of damage and the personnel's operation of section.
The bleeding agent is sodium polyphosphate or alkyl naphthalene sulfonic acid sodium solution, and the concentration of the bleeding agent is 2-5%；It is described
Corrosion inhibiter is methenamine, thiocarbamide, pyridine or compound quaternized pyridinium salting liquid, and the concentration of the corrosion inhibiter is 10-20%；It is described
Neutralization cleaning agent is sodium hydroxide, potassium hydroxide, sodium acid carbonate, sodium acetate or polyphosphoric acids sodium solution, the neutralization cleaning agent
Concentration be 15-30%；The passivator is sodium polyphosphate or potassium bichromate solution, and the concentration of the passivator is 10-
20%.
The neutralization cleaning agent, is alkaline reagent, for neutralizing the acidic materials in incrustation, is avoided clear in cleaning process
To the chemical damage of convection section during washing.Also, the bleeding agent, corrosion inhibiter, the selection for neutralizing cleaning agent and passivator, are
Inventor is on the basis of the incrustation component is fully studied, with reference to the phase between the cleaning ability and chemical reagent of current in itself
Interaction, that makes more preferably selects.
For the solubility of increase chemical reagent in water, preferable technical solution is the bleeding agent, corrosion inhibiter and neutralization
Hydrotrope is further included in cleaning agent, the content of the hydrotrope is less than 2%.The hydrotrope is polysorbate or polyoxyethylene fat
Fat acid esters.
Beneficial effects of the present invention are：The present invention adds chemical reagent in cleaning process at the same time, uses chemical reagent pair
The incrustation is loosened, and then incrustation is rinsed with containing the current for neutralizing cleaning agent, reduces the pressure of high pressure water flow
Power and flow, so as to significantly reduce damage of the cleaning process to convection section, while effectively increase the elimination efficiency to incrustation,
Simultaneously because incrustation is acidic materials, the acidic liquid formed during chemical reagent neutralising flush is added, is reduced in cleaning process
To the chemical damage of convection section.
Main chemical reactions equation in flushing process is：H++OH-=H2O。
Embodiment
With reference to embodiment, present disclosure is further illustrated.It should be appreciated that the implementation of the present invention is not limited to
In the following examples, the accommodation in any form and/or change made to the present invention fall within the scope of the present invention.
In the present invention, if not refering in particular to, all parts, percentage are unit of weight, and all equipment and raw material etc. are equal
It is commercially available or the industry is common.Method in following embodiments, is the routine of this area unless otherwise instructed
Method.
Embodiment 1
A kind of cleaning method of the efficient scale removal of oil field boiler convection section, comprises the following steps：
A, bleeding agent is sprayed：Bleeding agent is sprayed on convection section incrustation, micropore occurs in incrustation after standing；
B, corrosion inhibiter is sprayed：Corrosion inhibiter is sprayed on incrustation；
C, high pressure washing：The high pressure water flow for neutralizing cleaning agent using carrying is rinsed incrustation, i.e. complete after flushing
Into scale removal process.
The pressure of the high pressure water flow is less than 50MPa, and flow is less than 1.5m3/h.The bleeding agent is molten for sodium polyphosphate
Liquid, the concentration of the bleeding agent is 2%；The corrosion inhibiter is methenamine solution, and the concentration of the corrosion inhibiter is 20%；It is described
Neutralization cleaning agent is sodium hydroxide solution, and the concentration for neutralizing cleaning agent is 15%.
Embodiment 2
A kind of cleaning method of the efficient scale removal of oil field boiler convection section, comprises the following steps：
A, floating ash is removed：Remove the floating ash inside convection section；
B, bleeding agent is sprayed：Bleeding agent is sprayed on convection section incrustation, micropore occurs in incrustation after standing；
C, corrosion inhibiter is sprayed：Corrosion inhibiter is sprayed on incrustation；
D, high pressure washing：The high pressure water flow for neutralizing cleaning agent using carrying is rinsed incrustation, i.e. complete after flushing
Into scale removal process.
The pressure of the high pressure water flow is less than 50MPa, and flow is less than 1.5m3/h.The bleeding agent is Negel
Solution, the concentration of the bleeding agent is 5%；The corrosion inhibiter is thiourea solution, and the concentration of the corrosion inhibiter is 10%；In described
It is potassium hydroxide solution with cleaning agent, the concentration for neutralizing cleaning agent is 30%.
Embodiment 3
A kind of cleaning method of the efficient scale removal of oil field boiler convection section, comprises the following steps：
A, floating ash is removed：Remove the floating ash inside convection section；
B, bleeding agent is sprayed：Bleeding agent is sprayed on convection section incrustation, micropore occurs in incrustation after standing；
C, corrosion inhibiter is sprayed：Corrosion inhibiter is sprayed on incrustation；
D, high pressure washing：The high pressure water flow for neutralizing cleaning agent using carrying is rinsed incrustation；
E, check and repeat：Convection section is checked, if incrustation is not removed totally, repeat step B, C and D, until incrustation
It is rinsed clean；
F, passivator is sprayed：Passivator is sprayed to convection section heating surface；
G, spraying-rinsing：Convection section is cleaned using clear water；Clear water completes scale removal process after cleaning.
The bleeding agent is polyphosphoric acids sodium solution, and the concentration of the bleeding agent is 3%；The corrosion inhibiter is molten for pyridine
Liquid, the concentration of the corrosion inhibiter is 15%；The neutralization cleaning agent is sodium bicarbonate solution, and the concentration of the neutralization cleaning agent is
22%；The passivator is sodium polyphosphate, and the concentration of the passivator is 15%.
To increase the solubility of chemical reagent in water, increasing is further included in the bleeding agent, corrosion inhibiter and neutralization cleaning agent
Molten thing, the content of the hydrotrope is 1.5%.The hydrotrope is polysorbate.
Embodiment 4
A kind of cleaning method of the efficient scale removal of oil field boiler convection section, comprises the following steps：
A, floating ash is removed：Remove the floating ash inside convection section；
B, bleeding agent is sprayed：Bleeding agent is sprayed on convection section incrustation, micropore occurs in incrustation after standing；
C, corrosion inhibiter is sprayed：Corrosion inhibiter is sprayed on incrustation；
D, high pressure washing：The high pressure water flow for neutralizing cleaning agent using carrying is rinsed incrustation；
E, check and repeat：Convection section is checked, if incrustation is not removed totally, repeat step B, C and D, until incrustation
It is rinsed clean；
F, passivator is sprayed：Passivator is sprayed to convection section heating surface；
G, spraying-rinsing：Convection section is cleaned using clear water；Clear water completes scale removal process after cleaning.
The bleeding agent is alkyl naphthalene sulfonic acid sodium solution, and the concentration of the bleeding agent is 2%；The corrosion inhibiter is compound pyrrole
Pyridine quaternary ammonium salt solution, the concentration of the corrosion inhibiter is 20%；The neutralization cleaning agent is sodium acetate solution, the neutralization cleaning agent
Concentration be 15%；The passivator is potassium bichromate solution, and the concentration of the passivator is 20%.
To increase the solubility of chemical reagent in water, increasing is further included in the bleeding agent, corrosion inhibiter and neutralization cleaning agent
Molten thing, the content of the hydrotrope is 1%.The hydrotrope is polyoxyethylene fatty acid ester.
Embodiment 5
A kind of cleaning method of the efficient scale removal of oil field boiler convection section, comprises the following steps：
A, floating ash is removed：Remove the floating ash inside convection section；
B, bleeding agent is sprayed：Bleeding agent is sprayed on convection section incrustation, micropore occurs in incrustation after standing；
C, corrosion inhibiter is sprayed：Corrosion inhibiter is sprayed on incrustation；
D, high pressure washing：The high pressure water flow for neutralizing cleaning agent using carrying is rinsed incrustation；
E, check and repeat：Convection section is checked, if incrustation is not removed totally, repeat step B, C and D, until incrustation
It is rinsed clean；
F, passivator is sprayed：Passivator is sprayed to convection section heating surface；
G, spraying-rinsing：Convection section is cleaned using clear water；Clear water completes scale removal process after cleaning.
The bleeding agent is polyphosphoric acids sodium solution, and the concentration of the bleeding agent is 5%；The corrosion inhibiter is methenamine
Solution, the concentration of the corrosion inhibiter is 10%；The neutralization cleaning agent is sodium hydroxide solution, the concentration for neutralizing cleaning agent
For 30%；The passivator is polyphosphoric acids sodium solution, and the concentration of the passivator is 10%.
To increase the solubility of chemical reagent in water, increasing is further included in the bleeding agent, corrosion inhibiter and neutralization cleaning agent
Molten thing, the content of the hydrotrope is 2%.The hydrotrope is polysorbate.
Test example
This test example, is that the system effectiveness that same oil field boiler is carried out after convection section cleaning contrasts, as a result such as the institute of table 2
Show：
Table 2：System effectiveness contrast table before and after cleaning
From table 2, it can be seen that the thermal efficiency of the oil field boiler after cleaning is promoted to 90.60% from 87.10%, have and substantially carry
Rise, it was demonstrated that cleaning method provided by the invention has good cleaning performance.
It should be noted last that the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although ginseng
The present invention is described in detail according to preferred embodiment, it should be understood that the specific implementation the foregoing is merely the present invention
Mode, the protection domain being not intended to limit the present invention, within the spirit and principles of the invention, that is done any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of cleaning method of the efficient scale removal of oil field boiler convection section, it is characterised in that comprise the following steps：
A, bleeding agent is sprayed：Bleeding agent is sprayed on convection section incrustation；
B, corrosion inhibiter is sprayed：Corrosion inhibiter is sprayed on incrustation；
C, high pressure washing：The high pressure water flow for neutralizing cleaning agent using carrying is rinsed incrustation, after flushing, to convection section
Heating surface sprays passivator, that is, completes scale removal process；
The bleeding agent is alkyl naphthalene sulfonic acid sodium solution, and the concentration of the bleeding agent is 2-5%；The corrosion inhibiter is thiocarbamide or pyrrole
Pyridine solution, the concentration of the corrosion inhibiter is 10-20%；It is described neutralization cleaning agent for sodium hydroxide, potassium hydroxide, sodium acid carbonate or
Sodium acetate, the concentration for neutralizing cleaning agent is 15-30%；The passivator is potassium bichromate solution, the passivator it is dense
Spend for 10-20%.
2. cleaning method according to claim 1, it is characterised in that before step A, also remove floating grey step：Clearly
Except the floating ash inside convection section.
3. cleaning method according to claim 1, it is characterised in that comprise the following steps：
A, bleeding agent is sprayed：Bleeding agent is sprayed on convection section incrustation, micropore occurs in incrustation after standing；
B, corrosion inhibiter is sprayed：Corrosion inhibiter is sprayed on incrustation；
C, high pressure washing：The high pressure water flow for neutralizing cleaning agent using carrying is rinsed incrustation；
D, check and repeat：Convection section is checked, if incrustation is not removed totally, repeat step A, B and C, until incrustation is rushed
Wash clean.
4. cleaning method according to claim 1, it is characterised in that after sprinkling passivator step, also have spraying-rinsing
Step：Convection section is cleaned using clear water.
5. according to any cleaning methods of claim 1-3, it is characterised in that the pressure of the high pressure water flow is less than
50MPa, flow are less than 1.5m3/h。
6. cleaning method according to claim 1, it is characterised in that in the bleeding agent, corrosion inhibiter and neutralization cleaning agent
Hydrotrope is further included, the content of the hydrotrope is less than 2%.
7. cleaning method according to claim 6, it is characterised in that the hydrotrope is polysorbate or polyoxyethylene fat
Fat acid esters.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610388376.3A CN106051799B (en) | 2016-06-02 | 2016-06-02 | A kind of cleaning method of the efficient scale removal of oil field boiler convection section |
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| CN201610388376.3A CN106051799B (en) | 2016-06-02 | 2016-06-02 | A kind of cleaning method of the efficient scale removal of oil field boiler convection section |
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| CN106051799B true CN106051799B (en) | 2018-05-08 |
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| CN106800951B (en) * | 2017-01-12 | 2018-10-09 | 廊坊盛迪化工有限公司 | A kind of flue gas dirt matter dispersant and its preparation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005010454A2 (en) * | 2003-07-25 | 2005-02-03 | Romeo Lambasa | Cleaning agent, device and process for removing scale |
| CN101555441A (en) * | 2008-04-09 | 2009-10-14 | 中国神华能源股份有限公司 | Cleaning agent and cleaning process of GGH heat exchange component |
| CN104293531A (en) * | 2014-08-27 | 2015-01-21 | 范国臣 | Scale remover used for cleaning hot-blast stove and boiler and accessories thereof, and cleaning method thereof |
| CN104595916A (en) * | 2014-11-27 | 2015-05-06 | 中国石油天然气股份有限公司 | Method for cleaning accumulated ash of convection section fin of steam injection boiler |
-
2016
- 2016-06-02 CN CN201610388376.3A patent/CN106051799B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005010454A2 (en) * | 2003-07-25 | 2005-02-03 | Romeo Lambasa | Cleaning agent, device and process for removing scale |
| CN101555441A (en) * | 2008-04-09 | 2009-10-14 | 中国神华能源股份有限公司 | Cleaning agent and cleaning process of GGH heat exchange component |
| CN104293531A (en) * | 2014-08-27 | 2015-01-21 | 范国臣 | Scale remover used for cleaning hot-blast stove and boiler and accessories thereof, and cleaning method thereof |
| CN104595916A (en) * | 2014-11-27 | 2015-05-06 | 中国石油天然气股份有限公司 | Method for cleaning accumulated ash of convection section fin of steam injection boiler |
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