CN106854481A - The decoking additive and its preparation technology of coal-burning boiler - Google Patents
The decoking additive and its preparation technology of coal-burning boiler Download PDFInfo
- Publication number
- CN106854481A CN106854481A CN201510892441.1A CN201510892441A CN106854481A CN 106854481 A CN106854481 A CN 106854481A CN 201510892441 A CN201510892441 A CN 201510892441A CN 106854481 A CN106854481 A CN 106854481A
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- CN
- China
- Prior art keywords
- coal
- additive
- burning boiler
- decoking
- coke
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/04—Use of additives to fuels or fires for particular purposes for minimising corrosion or incrustation
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
- C10L2230/08—Inhibitors
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2250/00—Structural features of fuel components or fuel compositions, either in solid, liquid or gaseous state
- C10L2250/06—Particle, bubble or droplet size
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/22—Impregnation or immersion of a fuel component or a fuel as a whole
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses the decoking additive and its preparation technology of a kind of coal-burning boiler, the additive is a kind of white solid powder, and the component and percentage by weight of coke-removing agent are：Magnesium hydroxide powder 89-92%, mixed surfactant 2-3%, magnesium nitrate 4-5%, remaining is macromolecule stabilizer；The microstructure of coke-removing agent is a kind of core shell structure, i.e., coat one layer of nanometer organic matter layer collectively constituted by surfactant, magnesium nitrate, macromolecule stabilizer in magnesium hydroxide microparticle surfaces.By this additive with etc. quality water mix after can be formed stabilization suspension, by the suspension penetrating boiler fired coal burner hearth can effectively suppress boiler coke phenomenon.Advantages of the present invention：1st, simple to operate, consumption is few；2nd, decoking effect is good, may not only be applied to common coal, applies also for sodium content low-grade coal high；3rd, environmental pollution is small, and heavy metal is free of in additive；4th, compared to liquid additive, be more convenient for transport and preservation；5th, safety non-toxic, to human body fanout free region.
Description
Technical field
The present invention relates to a kind of additive, and in particular to the decoking additive and its preparation technology of a kind of coal-burning boiler.
Background technology
Coking is problem commonplace during coal-burning boiler runs, and boiler coke will cause the problems such as thermal efficiency is reduced, boiler plant is damaged, and burner hearth is resulted even in when serious and is stopped working or boiler tube bursting.In view of the harm of boiler coke, studies effective coal-burning boiler decoking additive and is just particularly important.
Several coke-removing agent products common in the market, although certain decoking effect can be played, but also there is following technological deficiency：First, under conditions of common coal is as fuel, these coke-removing agent products have preferably decoking effect；But when the alkaline matter in coal, when particularly sodium content is higher, it is impossible to effective slagging prevention phenomenon.Second, these coke-removing agent products usually contain the heavy metals such as Cu, there may be pollutants such as heavy metal aerosols in boiler combustion process.3rd, most of coke-removing agent products are liquid condition, deposit the shortcomings of possibility freezes, hauled weight is big, traffic condition is high under cryogenic.
The fire coal higher it is therefore desirable to be directed to sodium content, a kind of safe and environment-friendly, efficient coke-removing agent product of exploitation.
The content of the invention
The present invention in order to overcome the shortcomings of existing coal-burning boiler coke-removing agent, have developed a kind of new decoking additive, it is a kind of white solid powder, without heavy metal, have the advantages that safety and environmental protection, suitable for sodium coal high, transport it is easy to use.
The technical scheme is that：
A kind of coal-burning boiler devokes additive, it is characterized in that the microstructure of the coke-removing agent is a kind of core shell structure, one layer of nanometer organic matter layer collectively constituted by surfactant, magnesium nitrate, macromolecule stabilizer specifically is coated in magnesium hydroxide microparticle surfaces, the thickness of the organic matter layer is 5-10 nanometers.It is dispersed in the water for waiting quality that the organic matter layer can be effectively ensured the coke-removing agent, and stabilization was kept in one week without obvious sediment.
The surfactant is by the mixed surfactant that is constituted including neopelex, stearic acid, quaternary ammonium compound.
The macromolecule stabilizer includes polyurethane, poly- carboxymethylcellulose calcium, polyethylene glycol.
Present invention also offers the preparation technology that coal-burning boiler devokes additive, the component and percentage by weight of the decoking additive are：Magnesium hydroxide powder 89-92%；Magnesium nitrate 4-5%；Mixed surfactant 2-3%, the mixed surfactant includes neopelex, stearic acid, quaternary ammonium compound, mass ratio 1:1:1 ；Remaining is macromolecule stabilizer；
Preparation process is：
1）Magnesium hydroxide powder, magnesium nitrate, mixed surfactant, macromolecule stabilizer are weighed respectively；
2）Magnesium nitrate, mixed surfactant, macromolecule stabilizer are mixed, is dissolved in the 8-12 times of water of quality, form emulsion A；
3）Magnesium hydroxide powder is uniformly mixed with emulsion A using high speed uniform mixing equipment, forms slurries B；Thereby guarantee that and uniformly coat one layer of nanometer organic matter layer collectively constituted by surfactant, magnesium nitrate, macromolecule stabilizer in magnesium hydroxide microparticle surfaces, high speed uniform mixing equipment used can be milling apparatus, or high speed mixing machine etc.；
4）Slurries B is dried, powdered coal-burning boiler decoking additive finished product is ultimately formed.
The magnesium hydroxide purity requirement more than 95% for being used, its particle diameter is less than 800 mesh.
Macromolecule stabilizer includes polyurethane, poly- carboxymethylcellulose calcium, polyethylene glycol, mass ratio 1:1:1.
The application method of coke-removing agent be by this additive with etc. quality water mix after can be formed stabilization suspension, by the suspension penetrating boiler fired coal burner hearth can effectively suppress boiler coke phenomenon；Specific consumption is the 0.2-1% of ature of coal amount.
Know-why of the invention mainly includes：
The compositions such as mixed surfactant, macromolecule stabilizer the 1st, in coke-removing agent, can help coke-removing agent that the suspension of stabilization is formed in water, it is ensured that the phase kept stabilization without obvious sediment in one week；
2nd, after coke-removing agent forms the suspension of stabilization in water, then the suspension is sprayed into boiler fired coal burner hearth, it is ensured that coke-removing agent is dispersed in burner hearth, advantageously in enhancing decoking effect, reduction coke-removing agent consumption；
3rd, the magnesium hydroxide composition in coke-removing agent the material such as can remain with coal ash, carbonaceous in boiler combustion process and form more stable compound, and its fusing point is higher, is difficult coking；
4th, the nitric acid magnesium component in coke-removing agent can play catalytic action in boiler combustion process, effectively crush the coke button of formation, play decoking effect；
5th, its microstructure of guarantee coke-removing agent is a kind of core shell structure, i.e., coat one layer of nanometer organic matter layer collectively constituted by surfactant, magnesium nitrate, macromolecule stabilizer in magnesium hydroxide microparticle surfaces, is the key problem in technology that the coke-removing agent is efficiently devoked.
Beneficial effects of the present invention are：
1st, it is simple to operate, only need to by this additive with etc. quality water mix after can form the suspension of stabilization, the suspension is sprayed into boiler fired coal burner hearth, so that it may effective suppression boiler coke phenomenon；
2nd, consumption is few, and specific consumption is only the 0.2-1% of ature of coal amount；
3rd, decoking effect is good, may not only be applied to common coal, applies also for sodium content low-grade coal high；
4th, it is a kind of white solid powder, and without heavy metal, environmental pollution is small, will not produce the pollutants such as heavy metal aerosol；
5th, compared to liquid additive, will not freeze under cryogenic, shipping mass is small, be more convenient for transport and preservation；
6th, safety non-toxic, to human body fanout free region, it is ensured that operating personnel's safety.
Specific embodiment
Embodiment 1：
1）Decoking agent prescription：
Magnesium hydroxide powder 91%, mixed surfactant 3%, magnesium nitrate 5%, macromolecule stabilizer 1%.Preparation technology is with embodiment 1.
2）Application method：
Fire coal is the sodium coal high of sodium content 2.5%, 1200 degrees Celsius of ignition temperature, additive amount 1%.
3）Effect：
Using this coke-removing agent, there is not obvious coking phenomenon；And the cupric liquid coke-removing agent and iron content solid coke-removing agent using 1% there occurs more obvious coking phenomenon.
Embodiment 2：
1）Decoking agent prescription：
Magnesium hydroxide powder 89%, mixed surfactant 3%, magnesium nitrate 4%, macromolecule stabilizer 4%.Preparation technology is with embodiment 1.
2）Application method：
Fire coal is the common coal of sodium content 0.5%, 1200 degrees Celsius of ignition temperature, additive amount 0.2%.
3）Effect：
Using this coke-removing agent, there is not obvious coking phenomenon.
Concrete application approach of the present invention is a lot, and the above is only the preferred embodiment of the present invention, it should be pointed out that; for those skilled in the art; under the premise without departing from the principles of the invention, some improvement can also be made, these improvement also should be regarded as protection scope of the present invention.
Claims (6)
1. the decoking additive of coal-burning boiler, it is characterized in that the microstructure of the coke-removing agent is a kind of core shell structure, one layer of nanometer organic matter layer collectively constituted by surfactant, magnesium nitrate, macromolecule stabilizer specifically is coated in magnesium hydroxide microparticle surfaces, the thickness of the organic matter layer is 5-10 nanometers.
2. the decoking additive of coal-burning boiler according to claim 1, it is characterised in that the surfactant is by the mixed surfactant that is constituted including neopelex, stearic acid, quaternary ammonium compound.
3. the decoking additive of coal-burning boiler according to claim 1 and 2, it is characterised in that the macromolecule stabilizer includes polyurethane, poly- carboxymethylcellulose calcium, polyethylene glycol.
4. the preparation technology of the decoking additive of coal-burning boiler, it is characterised in that the component and percentage by weight of the decoking additive be：Magnesium hydroxide powder 89-92%；Magnesium nitrate 4-5%；Mixed surfactant 2-3%, the mixed surfactant includes neopelex, stearic acid, quaternary ammonium compound, mass ratio 1:1:1
；Remaining is macromolecule stabilizer；
Preparation process is：
1）Magnesium hydroxide powder, magnesium nitrate, mixed surfactant, macromolecule stabilizer are weighed respectively；
2）Magnesium nitrate, mixed surfactant, macromolecule stabilizer are mixed, is dissolved in the 8-12 times of water of quality, form emulsion A；
3）Magnesium hydroxide powder is uniformly mixed with emulsion A using high speed uniform mixing equipment, forms slurries B；
4）Slurries B is dried, powdered coal-burning boiler decoking additive finished product is ultimately formed.
5. coal-burning boiler according to claim 4 devokes the preparation technology of additive, it is characterised in that the magnesium hydroxide purity requirement more than 95% for being used, and its particle diameter is less than 800 mesh.
6. the coal-burning boiler according to claim 4 or 5 decoking additive preparation technology, it is characterised in that its macromolecule stabilizer include polyurethane, poly- carboxymethylcellulose calcium, polyethylene glycol, mass ratio 1:1:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510892441.1A CN106854481A (en) | 2015-12-08 | 2015-12-08 | The decoking additive and its preparation technology of coal-burning boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510892441.1A CN106854481A (en) | 2015-12-08 | 2015-12-08 | The decoking additive and its preparation technology of coal-burning boiler |
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| Publication Number | Publication Date |
|---|---|
| CN106854481A true CN106854481A (en) | 2017-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510892441.1A Pending CN106854481A (en) | 2015-12-08 | 2015-12-08 | The decoking additive and its preparation technology of coal-burning boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111253992A (en) * | 2018-11-30 | 2020-06-09 | 唐山市华亿生物质燃料有限公司 | Decoking agent and preparation method thereof |
-
2015
- 2015-12-08 CN CN201510892441.1A patent/CN106854481A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111253992A (en) * | 2018-11-30 | 2020-06-09 | 唐山市华亿生物质燃料有限公司 | Decoking agent and preparation method thereof |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170616 |