CN106642064A - Chemical cleaning method of boiler - Google Patents
Chemical cleaning method of boiler Download PDFInfo
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- CN106642064A CN106642064A CN201610860206.0A CN201610860206A CN106642064A CN 106642064 A CN106642064 A CN 106642064A CN 201610860206 A CN201610860206 A CN 201610860206A CN 106642064 A CN106642064 A CN 106642064A
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- steam generator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/54—De-sludging or blow-down devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to the field of boiler cleaning, in particular to a chemical cleaning method of a boiler. The method comprises the steps that air in a boiler system is evacuated through ammonia gas, and then the boiler system is cleaned integrally. According to the cleaning method, air in the boiler system is evacuated through the ammonia gas, and then the boiler system is cleaned, so that the boiler system is cleaned integrally, the integral cleaning effect of the boiler system can be improved, the descaling rate can be increased, and the corrosion rate is decreased.
Description
Technical field
The present invention relates to cleaning boiler field, in particular it relates to a kind of method of Boiler Chemical.
Background technology
China's generating set has been enter into the developing stage of Large Copacity, high parameter, and higher steam parameter is to station boiler
Metal material proposes harsher requirement, and the raising of the boiler operatiopn temperature in generating set exacerbates superheater, reheater
The steam side for even including the steam passage component such as header and pipeline is aoxidized, and this will cause three kinds of consequences：Oxide layer heat-blocking action
Cause metal overtemperature, substantially reduce the service life of superheater tube；The peeling of oxide layer causes overtemperature quick-fried in elbow etc. blocking
Pipe；Erosion of the oxide particle of peeling to grade blade before steam turbine causes steam turbine efficiency to decline.Take off when there is serious oxide skin
Fall and block after boiler tubing, it is necessary to take reliable chemical cleaning technique means to eliminate oxide skin, reduce unit operation safety
Risk.
But there is following defect in existing cleaning boiler technique：Superheater oxide skin is fine and close, and dirt amount is big, from traditional
Cleansing medium is difficult to clean up；Superheater tubes are steel alloy, and the offices such as spot corrosion, intercrystalline corrosion are susceptible in cleaning process
Corrode in portion；The residue produced in cleaning process is easily deposited in elbow under the superheater tube of vertical, has and causes plugging
Risk；Current cleaning is bad to boiler Integral cleaning effect, some position less cleaning positions.
Therefore, one kind being badly in need of now can integrally clean to boiler, and the boiler chemical that descaling rate is high, rate of corrosion is low
Cleaning method.
The content of the invention
The invention aims to overcome in prior art cannot integrally clean to boiler, and descaling rate is low, corruption
A kind of high defect of erosion rate, there is provided method of Boiler Chemical.
The present inventor has found under study for action, using the air in ammonia emptying steam generator system, then to boiler system
System is cleaned, and steam generator system can be made integrally to be cleaned, and can improve the Integral cleaning effect of steam generator system, and raising is removed
Dirty rate, reduction rate of corrosion.
Therefore, to achieve these goals, the invention provides a kind of method of Boiler Chemical, the method includes：
Air in steam generator system is emptied using ammonia, then steam generator system is integrally cleaned.
The cleaning method of the present invention empties the air in steam generator system by adopting ammonia, when enabling to subsequently clean,
Steam generator system inside is overall can be cleaned such that it is able to improved descaling rate, reduced rate of corrosion, and cleaning performance is significantly carried
It is high.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Fig. 1 is the schematic diagram that the chemical cleaning solution of the present invention circulates mode in steam generator system and cleaning pump 1.
Description of reference numerals
The water-cooling wall 8 of 1 cleaning pump, 2 economizer, 3 finishing superheater, 4 Late reworking, 5 division pendant superheater, 6 drum 7
Lower water bag
Specific embodiment
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.
The invention provides a kind of method of Boiler Chemical, the method includes：Using in ammonia emptying steam generator system
Air, then steam generator system is integrally cleaned.
The method according to the invention, wherein, the steam generator system can be the pot that the conventional needs in this area are cleaned
Furnace system, its structure can also be the conventional structure in this area, as shown in figure 1, steam generator system can include superheater, drum 6,
Water-cooling wall 7, economizer 2, lower water bag 8 and connection superheater, the pipeline between drum 6, water-cooling wall 7, economizer 2, lower water bag 8.This
In invention, according to the conventional connected mode in this area by conventional pipeline by superheater, drum 6, water-cooling wall 7, economizer 2,
Lower water bag 8 is attached.
It should be appreciated by those skilled in the art, the superheater can include：Division pendant superheater 5, shielded afterwards
Hot device 4, finishing superheater 3, division pendant superheater 5, Late reworking 4, finishing superheater 3 can connect and in parallel can also connect
Connect, be preferably connected in series.
It should be appreciated by those skilled in the art, using ammonia empty steam generator system in air before, need by
Cleaning equipment is attached with steam generator system, forms temporary system, and carries out leak and leak test to the temporary system.
According to method of the present invention, wherein, as long as ammonia emptying steam generator system in air mode guarantee by
Air in steam generator system is drained only, it is preferable that as shown in figure 1, the mode of air includes in ammonia emptying steam generator system
Ammonia is passed through from the porch of drum 6, ammonia occurs in the exit to finishing superheater 3, now, show ammonia already filled with
Steam generator system, the air in steam generator system is drained such that it is able to further improves to the overall cleaning performance of boiler, improves
Descaling rate, reduction rate of corrosion.
According to method of the present invention, wherein, the mode integrally cleaned to steam generator system can be normal for this area
The cleaning way of rule, but, in order to further improve the effect to steam generator system Integral cleaning, and further improve descaling rate,
Reduce rate of corrosion, it is preferable that the mode integrally cleaned to steam generator system includes：Sky in steam generator system is emptied using ammonia
After gas, steam generator system is rinsed using 45-55 DEG C of water, then again using 85-95 DEG C of chemical cleaning solution boiler rinsing system.
According to method of the present invention, wherein, the chemical cleaning solution can be provided by cleaning equipment, cleaning equipment
Can be the conventional cleaning equipment in this area, for example, can be cleaning pump 1.
According to method of the present invention, wherein it is preferred to, chemical cleaning solution is entered after steam generator system, in boiler system
Circulate in system and cleaning pump 1, further to reduce water consume.Chemical cleaning solution is followed in steam generator system and cleaning pump 1
Circulation flowing mode can be the conventional type of flow, for example, can be mode as shown in Figure 1, the chemistry provided by cleaning pump 1
Cleaning solution can clean finishing superheater 3, Late reworking 4 and division pendant superheater 5 and save coal by two routes arranged side by side
Device 2 a, route is to cause chemical cleaning solution successively by finishing superheater 3, Late reworking 4 and division pendant superheater 5,
Then chemical cleaning solution is entered back in drum 6；Another circuit passes through economizer 2, Ran Houhua to cause chemical cleaning solution
Learn cleaning solution to enter back in drum 6, then the chemical cleaning solution of drum 6 can be directly entered in lower water bag 8 and can also lead to
Cross water-cooling wall 7 to enter back in lower water bag 8, preferably entered back in lower water bag 8 by water-cooling wall 7, the chemical cleaning solution of lower water bag 8
Cleaning pump 1 is entered back into, is carried out in proper order successively.
According to method of the present invention, the method can also include：After whole cleaning process terminates, again using water
Steam generator system is rinsed, to remove the cleaning fluid remained in pipeline, it is ensured that water and steam quality is qualified in a short time during unit starting, greatly
The starting time of unit is saved greatly, while can substantially solve the problems, such as vent plug.
It should be appreciated by those skilled in the art, time of whole cleaning process by required cleaning steam generator system
Specification, the dirt amount of steam generator system determine, therefore, it can accordingly determine time of cleaning.
According to method of the present invention, wherein, the chemical cleaning medicament in chemical cleaning solution can be normal for this area
The chemical cleaning medicament of rule, it is preferable that the composition of the chemical cleaning medicament in chemical cleaning solution includes：MAC, corrosion inhibiter, also
Former agent and surfactant, on the basis of the gross weight of the chemical cleaning solution, the content of MAC is 31-35 weight %, inhibition
The content of agent is 0.35-0.45 weight %, and the content of reducing agent is 0.06-0.4 weight %, and the content of surfactant is
0.12-0.18 weight %, during balance of water such that it is able to further improve to the overall cleaning performance of steam generator system, goes forward side by side one
Step improves descaling rate and reduces rate of corrosion.Those skilled in the art knows that chemical cleaning solution in this refers to concentrate,
Needing when in use to be diluted to finite concentration using appropriate water just can use.
Preferably, MAC is by pyrovinic acid, nitrilotriacetic acid, diethylene triamine pentacetic acid (DTPA), ethylenediamine tetra-acetic acid and ammoniacal liquor group
Into, wherein, pyrovinic acid content be 10-15 weight %, nitrilotriacetic acid content be 30-40 weight %, the second of diethylenetriamine five
The content of acid is 25-30 weight %, and the content of ethylenediamine tetra-acetic acid is 15-20 weight %, balance of ammoniacal liquor.
According to method of the present invention, wherein, corrosion inhibiter can be the conventional inhibition for boiler rinsing in this area
Agent, it is preferable that corrosion inhibiter is by hexamethylene amine, methenamine, diamine, mercapto benzothiazole, BTA and water mixing group
Into, hexamethylene amine content be 10-15 weight %, the content of methenamine be 15-20 contents %, the content of diamine be 25-
30 weight %, the content of mercapto benzothiazole are 15-20 contents %, the content of BTA is 10-15 weight %, balance of
Water such that it is able to further improve to the overall cleaning performance of steam generator system, and further improve descaling rate and reduce rate of corrosion.
According to method of the present invention, wherein, reducing agent can be the conventional reduction for boiler rinsing in this area
Agent, it is preferable that the reducing agent is at least one in sodium iso-vc, hydrazine and acetoxime such that it is able to further improved to pot
The overall cleaning performance of furnace system, and further improve descaling rate and reduce rate of corrosion.
According to method of the present invention, wherein, the surfactant can be the various surfactants in this area, example
It such as can be at least one in neopelex, APES and alkylphenol polyethylene oxide ether.
The pH value of chemical cleaning solution used can be 1-7 in the present invention.
According to method of the present invention, wherein, to cleaning pump provide water amount there is no particular limitation, as long as can make
The water that must be provided reaches in steam generator system and cleaning pump 1 and circulate as above mode and can continuous circulation flushing pot
Furnace system, is 0.85m relative to superheater pipeline section for example2Steam generator system (steam generator system cumulative volume be 320m3),
There is provided the water of 1500-1600t/h by cleaning pump, steam generator system be rinsed, water reach in steam generator system and cleaning pump 1 as
Upper described circulates after mode 10-12h, in the water that the concentrate of chemical cleaning solution is injected in cleaning pump 1, formationization
Learn cleaning solution, relative to steam generator system and cleaning pump 1 in 756 tons of the water for circulating, the concentration of chemical cleaning solution
The injection rate of liquid is 160-170 tons, so that each in the chemical cleaning solution circulated in steam generator system and cleaning pump 1
Component content is in the range of above-mentioned preferred component content.
Embodiment
Model SG-2026/17.5-M905 of steam generator system, purchased from Shanghai Boiler Company, the size of cleaning pump is Q=2
×500m3/h；H=95m, purchased from Jiangsu Jingjiang water pump company,
The method for determining iron content in water sample is colorimetric method.
Preparation example 1
By mass percentage 31% MAC, 0.35% corrosion inhibiter, 0.4% reducing agent sodium iso-vc, 0.12% surface are lived
Property agent neopelex, balance of water is preparing chemical cleaning solution.
Wherein, MAC by following masses percentage material composition：Pyrovinic acid accounts for 10%, and nitrilotriacetic acid accounts for 30%, two
Ethene pentaacetic acid accounts for 25%, and ethylenediamine tetra-acetic acid accounts for 15%, balance of pH adjusting agent ammoniacal liquor；Corrosion inhibiter is by following masses hundred
Divide the material composition of ratio：Hexamethylene amine account for 10%, methenamine account for 15%, diamine account for 25%, mercapto benzothiazole account for 15%,
BTA accounts for 10%, balance of water.
Preparation example 2
By mass percentage 32% MAC, 0.4% corrosion inhibiter, 0.2% reducing agent sodium iso-vc, 0.15% surface are lived
Property agent neopelex, balance of water is preparing chemical cleaning solution.
Wherein, MAC by following masses percentage material composition：Pyrovinic acid accounts for 10%, and nitrilotriacetic acid accounts for 35%, two
Ethene pentaacetic acid accounts for 30%, and ethylenediamine tetra-acetic acid accounts for 20%, balance of pH adjusting agent ammoniacal liquor；Corrosion inhibiter is by following masses hundred
Divide the material composition of ratio：Hexamethylene amine account for 15%, methenamine account for 20%, diamine account for 30%, mercapto benzothiazole account for 15%,
BTA accounts for 10%, balance of water.
Preparation example 3
By mass percentage 31% MAC, 0.35% corrosion inhibiter, 0.4% reducing agent acetoxime, 0.12% surface are lived
Property agent APES, balance of water is preparing chemical cleaning solution.
Wherein, MAC by following masses percentage material composition：Pyrovinic acid accounts for 10%, and nitrilotriacetic acid accounts for 30%, two
Ethene pentaacetic acid accounts for 25%, and ethylenediamine tetra-acetic acid accounts for 15%, balance of pH adjusting agent ammoniacal liquor；Corrosion inhibiter is by following masses hundred
Divide the material composition of ratio：Hexamethylene amine account for 10%, methenamine account for 15%, diamine account for 25%, mercapto benzothiazole account for 15%,
BTA accounts for 10%, balance of water
Preparation example 4
Method according to preparation example 1 prepares chemical cleaning solution, except for the difference that, by mass percentage 1.0% MAC,
0.3% corrosion inhibiter, 0.5% reducing agent sodium iso-vc, 0.1% surfactant sodium dodecyl base benzene sulfonic acid sodium salt, balance of water comes
Prepare chemical cleaning solution.
Embodiment 1
The method that the present embodiment is used for the Boiler Chemical for illustrating the present invention.
As shown in figure 1, cleaning pump 1 and steam generator system are attached, gas leakage and leakage inspection are then carried out, check out nothing
After gas leakage and drainage, ammonia is constantly passed through from the porch of the drum 6 of steam generator system, and using ammonia density instrument equipment reality
When monitor the ammonia that whether has in exit of finishing superheater 3 and occur, when there is ammonia to occur, show ammonia by steam generator system
In air emptying, relative to boiler that pipe capacity is 320 cubes, (superheater pipeline section is 0.85m2), note in cleaning pump
The water yield for entering is 1500t/h, opens the valve between cleaning pump 1 and steam generator system, and the water for making 50 DEG C in cleaning pump passes through two
Side by side route rinses finishing superheater 3, Late reworking 4 and division pendant superheater 5 and economizer 2, and a route is to make successively
The water for obtaining 50 DEG C passes through finishing superheater 3, Late reworking 4 and division pendant superheater 5, and then flushing water is entered back in drum 6；
Another circuit is to cause 50 DEG C of water to pass through economizer 2, then rinses and enters back in drum 6, and then the flushing water of drum 6 leads to
Cross water-cooling wall 7 to enter back in lower water bag 8, the flushing water of lower water bag 8 enters back into cleaning pump 1, carries out in proper order successively.Circulation carries out 10
After hour, by the concentrate of chemical cleaning solution injection cleaning pump 1, follow relative to 756 tons in steam generator system and cleaning pump 1
The dynamic water of circulation, the injection rate of the concentrate of chemical cleaning solution is 160 tons, so that 85 DEG C of chemical cleaning solution is in boiler
Circulate in system and cleaning pump 1, the mode that for example above-mentioned water of the mode for circulating is rinsed, wherein, chemical cleaning solution
Concentrate is chemical cleaning solution obtained in preparation example 1.Sample from boiler liquid back pipe every 1h in cleaning process, determining should
Iron content in water sample, when iron content is constant, stops cleaning process, according to《Heat power plant boiler Chemical cleaning directive/guide》
DL/T 794-2012 prescriptive procedures determine the descaling rate of steam generator system and the rate of corrosion of steam generator system, as a result as shown in table 1.
Embodiment 2
The method that the present embodiment is used for the Boiler Chemical for illustrating the present invention.
As shown in figure 1, cleaning pump 1 and steam generator system are attached, gas leakage and leakage inspection are then carried out, check out nothing
After gas leakage and drainage, ammonia is constantly passed through from the porch of the drum 6 of steam generator system, and using ammonia density instrument equipment reality
When monitor the ammonia that whether has in exit of finishing superheater 3 and occur, when there is ammonia to occur, show ammonia by steam generator system
In air emptying, relative to boiler that pipe capacity is 320 cubes, (superheater pipeline section is 0.85m2), note in cleaning pump
The water yield for entering is 1500t/h, opens the valve between cleaning pump 1 and steam generator system, and the water for making 45 DEG C in cleaning pump passes through two
Side by side route rinses finishing superheater 3, Late reworking 4 and division pendant superheater 5 and economizer 2, and a route is to make successively
The water for obtaining 45 DEG C passes through finishing superheater 3, Late reworking 4 and division pendant superheater 5, and then flushing water is entered back in drum 6；
Another circuit is to cause 45 DEG C of water to pass through economizer 2, then rinses and enters back in drum 6, and then the flushing water of drum 6 leads to
Cross water-cooling wall 7 to enter back in lower water bag 8, the flushing water of lower water bag 8 enters back into cleaning pump 1, carries out in proper order successively.Circulation carries out 11
After hour, by the concentrate of chemical cleaning solution injection cleaning pump 1, follow relative to 756 tons in steam generator system and cleaning pump 1
The dynamic water of circulation, the injection rate of the concentrate of chemical cleaning solution is 165 tons, so that 85 DEG C of chemical cleaning solution is in boiler
Circulate in system and cleaning pump 1, the mode that for example above-mentioned water of the mode for circulating is rinsed, wherein, chemical cleaning solution
Concentrate is chemical cleaning solution obtained in preparation example 2.Sample from boiler liquid back pipe every 1h in cleaning process, determining should
Iron content in water sample, when iron content is constant, stops cleaning process, according to《Heat power plant boiler Chemical cleaning directive/guide》
DL/T 794-2012 prescriptive procedures determine the descaling rate of steam generator system and the rate of corrosion of steam generator system, as a result as shown in table 1.
Embodiment 3
The method that the present embodiment is used for the Boiler Chemical for illustrating the present invention.
As shown in figure 1, cleaning pump 1 and steam generator system are attached, gas leakage and leakage inspection are then carried out, check out nothing
After gas leakage and drainage, ammonia is constantly passed through from the porch of the drum 6 of steam generator system, and using ammonia density instrument equipment reality
When monitor the ammonia that whether has in exit of finishing superheater 3 and occur, when there is ammonia to occur, show ammonia by steam generator system
In air emptying, relative to boiler that pipe capacity is 320 cubes, (superheater pipeline section is 0.85m2), note in cleaning pump
The water yield for entering is 1500t/h, opens the valve between cleaning pump 1 and steam generator system, and the water for making 55 DEG C in cleaning pump passes through two
Side by side route rinses finishing superheater 3, Late reworking 4 and division pendant superheater 5 and economizer 2, and a route is to make successively
The water for obtaining 50 DEG C passes through finishing superheater 3, Late reworking 4 and division pendant superheater 5, and then flushing water is entered back in drum 6；
Another circuit is to cause 55 DEG C of water to pass through economizer 2, then rinses and enters back in drum 6, and then the flushing water of drum 6 leads to
Cross water-cooling wall 7 to enter back in lower water bag 8, the flushing water of lower water bag 8 enters back into cleaning pump 1, carries out in proper order successively.Circulation carries out 12
After hour, by the concentrate of chemical cleaning solution injection cleaning pump 1, follow relative to 756 tons in steam generator system and cleaning pump 1
The dynamic water of circulation, the injection rate of the concentrate of chemical cleaning solution is 170 tons, so that 90 DEG C of chemical cleaning solution is in boiler
Circulate in system and cleaning pump 1, the mode that for example above-mentioned water of the mode for circulating is rinsed, wherein, chemical cleaning solution
Concentrate is chemical cleaning solution obtained in preparation example 3.Sample from boiler liquid back pipe every 1h in cleaning process, determining should
Iron content in water sample, when iron content is constant, stops cleaning process, according to《Heat power plant boiler Chemical cleaning directive/guide》
DL/T 794-2012 prescriptive procedures determine the descaling rate of steam generator system and the rate of corrosion of steam generator system, as a result as shown in table 1.
Embodiment 4
The method that the present embodiment is used for the Boiler Chemical for illustrating the present invention.
Method according to embodiment 1 carries out Boiler Chemical, except for the difference that, the concentrate of chemical cleaning solution used
The chemical cleaning solution obtained in preparation example 4, according to《Heat power plant boiler Chemical cleaning directive/guide》DL/T 794-2012 specify
Method determines the descaling rate of steam generator system and the rate of corrosion of steam generator system, as a result as shown in table 1.
Embodiment 5
The method that the present embodiment is used for the Boiler Chemical for illustrating the present invention
Method according to embodiment 1 carries out Boiler Chemical, except for the difference that, using 40 DEG C of water steam generator system is rinsed,
Then 100 DEG C of chemical cleaning solution boiler rinsing system is adopted again, according to《Heat power plant boiler Chemical cleaning directive/guide》DL/
T 794-2012 prescriptive procedures determine the descaling rate of steam generator system and the rate of corrosion of steam generator system, as a result as shown in table 1.
Comparative example 1
Method according to embodiment 1 carries out Boiler Chemical, except for the difference that, be not passed through ammonia directly enter water-filling rinse and
Chemical cleaning, according to《Heat power plant boiler Chemical cleaning directive/guide》DL/T 794-2012 prescriptive procedures determine steam generator system
The rate of corrosion of descaling rate and steam generator system, as a result as shown in table 1.
Table 1
| Descaling rate (%) | Rate of corrosion g/ (m2·h) | |
| Embodiment 1 | 98.2 | 1.5 |
| Embodiment 2 | 97.3 | 1.1 |
| Embodiment 3 | 97.6 | 1.4 |
| Embodiment 4 | 95.3 | 2.7 |
| Embodiment 5 | 93.7 | 2.8 |
| Comparative example 1 | 92.3 | 5.7 |
Then the cleaning method of the present invention is carried out clearly by being emptied the air in steam generator system using ammonia to steam generator system
Wash, steam generator system can be made integrally to be cleaned, improve the Integral cleaning effect of steam generator system, and improve descaling rate, reduce
Rate of corrosion.The cleaning performance of the cleaning method of the present invention reaches expection, and without alignment type system big change is carried out；Not to original
There is system or equipment to cause to damage or reduce service life.Eliminating affects the major hidden danger of unit safety operation.Without generation
Oxide skin plugging, solves the technical barrier of current Chemical cleaning generally existing：Oxide skin is fine and close, and dirt amount is big, it is difficult to clean；Pipe
Material is steel alloy, there is the local corrosion possibility such as intercrystalline corrosion, stress corrosion；The residue of generation is deposited in lower elbow, holds
Easily plugging.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, various letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy is no longer separately illustrated.
Additionally, can also be combined between a variety of embodiments of the present invention, as long as it is without prejudice to this
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (12)
1. a kind of method of Boiler Chemical, it is characterised in that the method includes：Sky in steam generator system is emptied using ammonia
Gas, then integrally cleans to steam generator system.
2. method according to claim 1, wherein, the steam generator system includes：Superheater, drum, water-cooling wall, province's coal
Device, lower water bag and connection superheater, drum, water-cooling wall, economizer, the pipeline of lower water parlor.
3. method according to claim 2, wherein, the superheater includes：Division pendant superheater, Late reworking, end
Level superheater.
4. method according to claim 3, wherein, the mode of air includes in ammonia emptying steam generator system：By ammonia from
The porch of drum is passed through, and ammonia occurs in the exit to finishing superheater.
5. method according to claim 1, wherein, the mode integrally cleaned to steam generator system includes：Using ammonia
After air in emptying steam generator system, steam generator system is rinsed using 45-55 DEG C of water, then the chemistry again using 85-95 DEG C is clear
Dilution boiler rinsing system.
6. method according to claim 5, wherein, the chemical cleaning solution is provided by cleaning pump.
7. method according to claim 6, wherein, the chemical cleaning solution is entered after steam generator system, in steam generator system
Circulate with cleaning pump.
8. the method according to any one in claim 5-7, wherein, the Chemical cleaning medicine in the chemical cleaning solution
The composition of agent includes：MAC, corrosion inhibiter, reducing agent and surfactant, on the basis of the gross weight of the chemical cleaning solution,
The content of MAC is 31-35 weight %, and the content of corrosion inhibiter is 0.35-0.45 weight %, and the content of reducing agent is 0.06-0.4 weights
Amount %, the content of surfactant is 0.12-0.18 weight %, balance of water.
9. method according to claim 8, wherein, MAC by pyrovinic acid, nitrilotriacetic acid, diethylene triamine pentacetic acid (DTPA),
Ethylenediamine tetra-acetic acid and ammoniacal liquor are constituted, wherein, pyrovinic acid content is 10-15 weight %, and nitrilotriacetic acid content is 30-40 weights
Amount %, the content of diethylene triamine pentacetic acid (DTPA) is 25-30 weight %, and the content of ethylenediamine tetra-acetic acid is 15-20 weight %, surplus
For ammoniacal liquor.
10. method according to claim 8, wherein, the corrosion inhibiter is by hexamethylene amine, methenamine, diamine, sulfydryl
Benzothiazole, BTA and water mixing composition, the content of hexamethylene amine is 10-15 weight %, the content of methenamine
For 15-20 contents %, the content of diamine be 25-30 weight %, the content of mercapto benzothiazole be 15-20 contents %, benzo three
The content of nitrogen azoles be 10-15 weight %, balance of water.
11. methods according to claim 8, wherein, the reducing agent is at least in sodium iso-vc, hydrazine and acetoxime
Kind.
12. methods according to claim 8, wherein, the surfactant is neopelex, alkyl phenol gathers
At least one in oxygen vinethene and alkylphenol polyethylene oxide ether.
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|---|---|---|---|
| CN201610860206.0A CN106642064A (en) | 2016-09-28 | 2016-09-28 | Chemical cleaning method of boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610860206.0A CN106642064A (en) | 2016-09-28 | 2016-09-28 | Chemical cleaning method of boiler |
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| CN108088874A (en) * | 2017-12-12 | 2018-05-29 | 西南石油大学 | A kind of leaching method of black shale soluble salt |
| CN108613158A (en) * | 2018-07-05 | 2018-10-02 | 哈尔滨锅炉厂有限责任公司 | A kind of device of the heated surface oxidized skin of online recycling boiler high temperature |
| CN110542345A (en) * | 2019-09-10 | 2019-12-06 | 浙江石油化工有限公司 | cleaning device and cleaning method for acetaldehyde scaling heat exchanger |
| JP2020106199A (en) * | 2018-12-27 | 2020-07-09 | 三菱日立パワーシステムズ株式会社 | Cleaning and storage method for boiler plant and cleaning and storage device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008107040A (en) * | 2006-10-26 | 2008-05-08 | Chugoku Electric Power Co Inc:The | Boiler system and control method of boiler system |
| CN102494328A (en) * | 2011-12-13 | 2012-06-13 | 长沙市中蓝清洗技术有限公司 | Boiler cleaning process |
| CN102719834A (en) * | 2012-06-04 | 2012-10-10 | 西安热工研究院有限公司 | Chemical cleaning agent for superheater heat exchange pipe of station boiler |
| CN105135412A (en) * | 2015-09-17 | 2015-12-09 | 陕西创英电力工程有限公司 | Unit cleaning technology of supercritical boiler |
-
2016
- 2016-09-28 CN CN201610860206.0A patent/CN106642064A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008107040A (en) * | 2006-10-26 | 2008-05-08 | Chugoku Electric Power Co Inc:The | Boiler system and control method of boiler system |
| CN102494328A (en) * | 2011-12-13 | 2012-06-13 | 长沙市中蓝清洗技术有限公司 | Boiler cleaning process |
| CN102719834A (en) * | 2012-06-04 | 2012-10-10 | 西安热工研究院有限公司 | Chemical cleaning agent for superheater heat exchange pipe of station boiler |
| CN105135412A (en) * | 2015-09-17 | 2015-12-09 | 陕西创英电力工程有限公司 | Unit cleaning technology of supercritical boiler |
Non-Patent Citations (3)
| Title |
|---|
| 吉林电力学院锅炉教研室: "《锅炉设备及运行》", 31 August 1961, 中国工业出版社 * |
| 国家能源局: "《火力发电厂锅炉化学清洗导则》", 31 March 2012, 中国电力出版社 * |
| 编委会: "《锅炉设备安装》", 31 January 2012, 中国电力出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108088874A (en) * | 2017-12-12 | 2018-05-29 | 西南石油大学 | A kind of leaching method of black shale soluble salt |
| CN108613158A (en) * | 2018-07-05 | 2018-10-02 | 哈尔滨锅炉厂有限责任公司 | A kind of device of the heated surface oxidized skin of online recycling boiler high temperature |
| JP2020106199A (en) * | 2018-12-27 | 2020-07-09 | 三菱日立パワーシステムズ株式会社 | Cleaning and storage method for boiler plant and cleaning and storage device |
| JP7150594B2 (en) | 2018-12-27 | 2022-10-11 | 三菱重工業株式会社 | Boiler plant cleaning storage method and cleaning storage device |
| CN110542345A (en) * | 2019-09-10 | 2019-12-06 | 浙江石油化工有限公司 | cleaning device and cleaning method for acetaldehyde scaling heat exchanger |
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