CN103215101B - Decoking and coal-saving additive for supercritical or super-supercritical boiler - Google Patents
Decoking and coal-saving additive for supercritical or super-supercritical boiler Download PDFInfo
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- CN103215101B CN103215101B CN201310119148.2A CN201310119148A CN103215101B CN 103215101 B CN103215101 B CN 103215101B CN 201310119148 A CN201310119148 A CN 201310119148A CN 103215101 B CN103215101 B CN 103215101B
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- Prior art keywords
- additive
- boiler
- supercritical
- water
- decoking
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- 239000000654 additive Substances 0.000 title claims abstract description 24
- 230000000996 additive effect Effects 0.000 title claims abstract description 24
- 238000005235 decoking Methods 0.000 title claims abstract description 19
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims abstract description 30
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 20
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 10
- 235000019270 ammonium chloride Nutrition 0.000 claims abstract description 10
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004327 boric acid Substances 0.000 claims abstract description 10
- 239000000919 ceramic Substances 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 10
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- 238000004939 coking Methods 0.000 abstract description 14
- 239000000571 coke Substances 0.000 abstract description 8
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 150000003839 salts Chemical class 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 238000004880 explosion Methods 0.000 abstract description 3
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract description 2
- 231100000252 nontoxic Toxicity 0.000 abstract description 2
- 230000003000 nontoxic effect Effects 0.000 abstract description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 abstract 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 abstract 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 abstract 1
- 239000001099 ammonium carbonate Substances 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- 239000003381 stabilizer Substances 0.000 abstract 1
- 238000010248 power generation Methods 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000010338 boric acid Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention discloses a decoking and coal-saving additive for a supercritical or super-supercritical boiler. The additive comprises the components in percentage by weight as follows: 8.5-12.3% of magnesium nitrate, 5.0-7.2% of cupric nitrate, 6.0-8.5% of ammonium chloride, 1.2-2.5% of ammonium bicarbonate, 2.3-3.6% of boric acid, 1.5-2.0% of sodium dodecyl sulfate, 1.2-2.8% of modified nano ceramic powder dissolved in water, 1.2-2.2% of stabilizer and the balance of water. The additive provided by the invention has the advantages that 1, the additive is simple to operate and small in use level; 2, the decoking effect is good, and coke blocks can be quickly smashed; 3, the additive is less in environmental pollution, less in heavy metal salt content and less in smoke carried and generated by combustion and heavy metal; 4, the using safety of the boiler can be improved, and after coking of the boiler, the additive is quickly used to effectively prevent tube explosion of the boiler, and meanwhile to prevent large coking blocks from falling into a submerged chain conveyor to lead to major accident of chain breakage of the submerged chain conveyor; and 5, the additive is safe and non-toxic and does not harm the human body.
Description
Technical field
The invention belongs to coal additive, be specifically related to a kind of overcritical or ultra-supercritical boiler decoking coal-saving additive.
Background technology
Because capacity is large, parameter is high, thermo-efficiency is high and environmental protection, overcritical or ultra supercritical thermal power generation unit more and more drops into be built or operation.But owing to being subject to the various factors such as unit combustion conditions, ature of coal, in actual motion, be easy to occur serious coking and dust stratification.Boiler coke can cause water wall tube thermal resistance to increase, and when serious, pipe explosion accident can occur.
At present domestic overcritical or ultra supercritical power generation unit is generally by artificial decoking or blow the method that ash combines and solve the problem of coking.But above these methods cannot be brought into play useful effect in the time that coking is serious.In Industrial Boiler, generally use decoking agent to solve decoking problem, overcritical or ultra supercritical power generation unit boiler is compared with Industrial Boiler, parameter is high, capacity uses steel alloy greatly, in a large number, any additive must just can come into operation through strict test, and once the have an accident scope of impact of overcritical or ultra supercritical power generation unit is relatively wide, therefore add any additive all need careful.
The decoking additive that Industrial Boiler uses generally contains vitriol, metal-salt compound, heavy metallic salt etc., overcritical or ultra supercritical thermal power generation unit is due to a large amount of steel alloys that use, at high temperature vitriol can cause serious corrosion, reduction of service life by alloy steel; Heavy metallic salt can cause serious pollution to environment, and therefore industrial decoking agent can not directly apply to critical or ultra supercritical thermal power generation unit.
Summary of the invention
The technical problem to be solved in the present invention is to provide the overcritical or ultra-supercritical boiler decoking coal-saving additive of a kind of, environmentally safe little to metal material corrosion, easy to use, cost economy, to solve the problem overcritical or coking of ultra supercritical thermal power generation unit.
Technical scheme of the present invention is:
Overcritical or ultra-supercritical boiler decoking coal-saving additive, is made up of by weight percentage following composition:
Magnesium nitrate 8.5% ~ 12.3%, cupric nitrate 5.0% ~ 7.2%, ammonium chloride 6.0% ~ 8.5%, bicarbonate of ammonia 1.2% ~ 2.5%, boric acid 2.3% ~ 3.6%, sodium laurylsulfonate 1.5 ~ 2.0%, water-soluble modified Nano ceramics powder 1.2% ~ 2.8%, stablizer 1.2% ~ 2.2%, surplus is water.
The present invention is preferably:
Magnesium nitrate 10.8%, cupric nitrate 6.2%, ammonium chloride 7.5%, bicarbonate of ammonia 1.9%, boric acid 3.0%, sodium laurylsulfonate 1.8%, water-soluble modified Nano ceramics powder 2.4%, stablizer 1.7%, surplus is water.
Boiler coke is that the impurity in fuel does not have perfect combustion in itself, is attached on tube wall, economizer and air preheater, causes and corrodes and reduce heat exchanger effectiveness.
The principle of work of boiler decoking agent is to play physics chemical action with coking material, first makes coking material pineization and makes it perfect combustion, finally changes into light ash, is discharged by flue.
Chemical reaction mechanism is the fusing point that improves coking layer eutectic, makes it secondary combustion.In the time of the temperature of 700 ~ 800 DEG C, under the effect of air-flow, carbon, sulphur and other combustiblesubstance in decoking agent and coking layer bumps, rubs burning and microexplosion phenomenon occur, and coking layer pineization come off.Decoking agent can also permeate coking layer inside in addition, changes the lattice of coking layer, makes coking layer crystal body from hard loose shape, the reinforcement decoking effect of becoming.
The compound method of additive of the present invention is very simple, only commercially available pure magnesium nitrate, cupric nitrate, ammonium chloride, bicarbonate of ammonia, boric acid, sodium laurylsulfonate, water-soluble modified Nano ceramics powder, stablizer need be mixed by weight percentage with water.
The using method of additive of the present invention, be sprayed on surface at boiler coke place with special chemicals dosing plant by spy hole, specifically consumption should be determined by the sulphur content of coal according to overcritical or ultra-supercritical boiler, and general addition is 3/100000 ~ 6/100000 of fuel usage quantity.
The invention has the beneficial effects as follows:
1, simple to operate, consumption is little, is sprayed on surface by spy hole at boiler coke place with special chemicals dosing plant, and with 600MW boiler calculation, every day, usage quantity was only 150 ~ 250 liters;
2, decoking is effective, and chemical reaction at high temperature can occur this additive, produces microburst effect, can fast-crushing coke button;
3, environmental pollution is little, and in this additive, heavy metallic salt content is little, burning produce flue gas carry and heavy metal amount few, environmental pollution is little;
4, can improve the safety in utilization of boiler, after boiler coke, use fast this additive can effectively prevent that boiler pipe explosion accident from occurring, and can prevent that the coke button of bulk from falling into the Serious Accident that dragveyer causes dragveyer chain breakage simultaneously;
5, this additive safety non-toxic, to the injury of person nothing.
Embodiment
Embodiment 1
Following composition is mixed by weight percentage:
Magnesium nitrate 8.5%, cupric nitrate 5.0%, ammonium chloride 6.0%, bicarbonate of ammonia 1.2%, boric acid 2.3%, sodium laurylsulfonate 1.5, water-soluble modified Nano ceramics powder 1.2%, stablizer 1.2%, surplus is water.
Embodiment 2
Following composition is mixed by weight percentage:
Magnesium nitrate 9.5%, cupric nitrate 5.6%, ammonium chloride 6.6%, bicarbonate of ammonia 1.7%, boric acid 2.5%, sodium laurylsulfonate 1.6%, water-soluble modified Nano ceramics powder 1.6%, stablizer 1.4%, surplus is water.
Embodiment 3
Following composition is mixed by weight percentage:
Magnesium nitrate 10.8%, cupric nitrate 6.2%, ammonium chloride 7.5%, bicarbonate of ammonia 1.9%, boric acid 3.0%, sodium laurylsulfonate 1.8%, water-soluble modified Nano ceramics powder 2.4%, stablizer 1.7%, surplus is water.
Embodiment 4
Following composition is mixed by weight percentage:
Magnesium nitrate 12.3%, cupric nitrate 7.2%, ammonium chloride 8.5%, bicarbonate of ammonia 2.5%, boric acid 3.6%, sodium laurylsulfonate 2.0%, water-soluble modified Nano ceramics powder 2.8%, stablizer 2.2%, surplus is water.
Claims (2)
1. an overcritical or ultra-supercritical boiler decoking coal-saving additive, is characterized in that being made up of by weight percentage following composition:
Magnesium nitrate 8.5% ~ 12.3%, cupric nitrate 5.0% ~ 7.2%, ammonium chloride 6.0% ~ 8.5%, bicarbonate of ammonia 1.2% ~ 2.5%, boric acid 2.3% ~ 3.6%, sodium laurylsulfonate 1.5 ~ 2.0%, water-soluble modified Nano ceramics powder 1.2% ~ 2.8%, stablizer 1.2% ~ 2.2%, surplus is water.
2. overcritical or ultra-supercritical boiler decoking coal-saving additive according to claim 1, is characterized in that being made up of by weight percentage following composition:
Magnesium nitrate 10.8%, cupric nitrate 6.2%, ammonium chloride 7.5%, bicarbonate of ammonia 1.9%, boric acid 3.0%, sodium laurylsulfonate 1.8%, water-soluble modified Nano ceramics powder 2.4%, stablizer 1.7%, surplus is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310119148.2A CN103215101B (en) | 2013-04-08 | 2013-04-08 | Decoking and coal-saving additive for supercritical or super-supercritical boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310119148.2A CN103215101B (en) | 2013-04-08 | 2013-04-08 | Decoking and coal-saving additive for supercritical or super-supercritical boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103215101A CN103215101A (en) | 2013-07-24 |
| CN103215101B true CN103215101B (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310119148.2A Active CN103215101B (en) | 2013-04-08 | 2013-04-08 | Decoking and coal-saving additive for supercritical or super-supercritical boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN103215101B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108192685B (en) * | 2017-12-28 | 2020-12-29 | 上海天汉环境资源有限公司 | Online chemical decoking agent and decoking process based on hazardous waste incineration coking |
| CN113175662A (en) * | 2021-05-20 | 2021-07-27 | 济南作为科技有限公司 | Industrial boiler non-stop early warning method based on mechanism and mathematical model |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102851100B (en) * | 2011-07-01 | 2015-08-26 | 晟通科技集团有限公司 | A kind of boiler decoking agent |
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- 2013-04-08 CN CN201310119148.2A patent/CN103215101B/en active Active
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| Publication number | Publication date |
|---|---|
| CN103215101A (en) | 2013-07-24 |
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