CN107267250A - A kind of boiler dirt-resistant additive and its preparation and application - Google Patents
A kind of boiler dirt-resistant additive and its preparation and application Download PDFInfo
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- CN107267250A CN107267250A CN201710463168.XA CN201710463168A CN107267250A CN 107267250 A CN107267250 A CN 107267250A CN 201710463168 A CN201710463168 A CN 201710463168A CN 107267250 A CN107267250 A CN 107267250A
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- boiler
- dirt
- additive
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- coal
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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
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
Abstract
The present invention relates to a kind of boiler dirt-resistant additive and its preparation and application, the additive includes the component of following parts by weight：MnWO425~35 parts；Al3(SiO3)320~30 parts；SiO210~20 parts；Al2O35~15 parts；Cr2O310~20 parts；MnO21~10 part.Compared with prior art, the present invention is not on the premise of boiler structure and service condition is changed, it can effectively improve and easily stain fuel ash fusing point, reduce its caking property, substantially reduce slagging, the dust stratification problem for using and easily staiing fuel boiler, strengthen heat exchanger tube heat-transfer effect, reduce the flue gas loss of boiler, improve boiler efficiency；Electrical energy consumption of ventilation is reduced, station service has been saved；Effectively reduce the risk of carbonated drink normal work inside slagging influence heating surface, it is therefore prevented that carbonated drink pipe overheats booster；Reduce corrosion of the slagging to metal pipe-wall.The present invention expands accommodation of the boiler to easily contamination fuel for solving the problems, such as easily to stain fuel slagging, dust stratification.
Description
Technical field
The present invention relates to boiler technology field, and in particular to a kind of boiler dirt-resistant additive and its preparation and application.
Background technology
Many coals, few gas, oil-poor energy resource structure determine that coal is still the leading of China in the future for a long period of time
The energy.Thermal power plant, which is undoubtedly, uses coal rich and influential family, and wherein quite a few is low-order coal, when boiler uses low-order coal, easily causes tight
The dust stratification of weight and slagging.Because grey dirt has the thermal resistance more much bigger than metallic walls, thus heat-transfer effect is reduced, add boiler
Flue gas loss, reduces boiler efficiency, and adds electrical energy consumption of ventilation.Simultaneously as slagging has a locality, thus have influence on by
Carbonated drink normal work inside hot face.Serious slagging will block exhaust gases passes and burner hearth slag-drip opening and carbonated drink pipe is overheated booster,
Destruction equipment is continuously run.Slagging also exacerbates corrosion of metal.To remove slagging, shutdown maintenance of often having to is short by then every 3
Once, long then every 6 months shutdown maintenances once, substantially reduce the time that boiler is continuously run, caused huge individual month shutdown maintenance
Big economic loss.To prevent slagging, some boilers are also forced to run at low load for a long time.Therefore, dust stratification, the serious shadow of slagging
Ring the availability of boiler, exert oneself and security, bring huge economic loss.Therefore, boiler structure and operation are not being changed
On the premise of condition, seek a kind of energy-efficient, inexpensive, strong ecad boiler dirt-resistant additive and be just particularly important.
Current dirt-resistant additive types are various, can be divided into 3 classes according to the main component of additive：Based on kaolin
Dirt-resistant additive, such as patent CN102786998 A, CN104371790 A, CN104327903 A, though the good consumption of effect
Greatly, freight charges are high, the slow, fuel tolerance that works is poor, and kaolinic combination water evaporation heat absorption can reduce boiler efficiency；With Cr2O3, oxygen
Agent, adsorbent are the chromium base dirt-resistant additive of main component, such as A, CN 104910996 of patent CN 104845698
A, CN103060051A, though it is fast to work, effect is general, and fuel tolerance is poor, so being difficult to promote；With Al2O3Pure material and
SiO2Oxide dirt-resistant additive based on pure material, such as patent CN104371789 A, CN104745270 A,
CN104164270 A, though the good cost of raw material of effect is high, fuel tolerance is poor.Although above-mentioned three classes dirt-resistant additive is each
It is advantageous, but consumption is big, freight charges are high, action is slow, the inferior position of fuel tolerance difference causes it to be very limited using scope,
It is extremely difficult to popularization truly.So a kind of energy-efficient, inexpensive, strong ecad boiler dirt-resistant additive of research and development
It is particularly important.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind it is energy-efficient, low into
Originally, the boiler dirt-resistant additive of strong ecad and its preparation and application.
The purpose of the present invention can be achieved through the following technical solutions：A kind of boiler dirt-resistant additive, the additive
Include the component of following parts by weight：
MnWO4Dirt-resistant effect is fabulous, can significantly improve ash content fusing point, and coal adaptability is excellent；Al3(SiO3)3Performance
Go out good alkali metal conversion ratio, alkali metal can be converted into stable alkali metal aluminosilicate, alkali metal is significantly reduced
Corrosion and alkali metal stain.MnWO4、Al3(SiO3)3、SiO2、Al2O3、Cr2O3、MnO2After combination, fabulous resist more is shown
Effect is stain, excellent coal adaptability, mechanism is as follows：MnWO under hot conditions4Combined with the part inorganic elements in ash content
High-melting-point tungsten thing is formed, grey component is improved, significantly improves ash content fusing point, while the unstable alkali metal chemical combination in ash content
Thing at high temperature with Al3(SiO3)3、SiO2、Al2O3Reaction, alkali metal is converted into stable alkali metal aluminosilicate, further
Significantly reduce Cr in corrosion and contamination degree that alkali metal is caused, formula2O3Play booster action, promote by above-mentioned anti-
Cinder after answering is changed into crystalline state from glassy state, further makes ash content rapid shaping, prevents flowable state cinder from staiing boiler, formula
Middle MnO2Then as catalyst, the dirt-resistant reaction of the catalysis above improves reaction rate, stabilizes dirt-resistant effect, improve
The adaptability of coal.
A kind of preparation method of boiler dirt-resistant additive as described above, comprises the following steps：Each component is crushed, so
It is well mixed according to parts by weight afterwards, produce the boiler dirt-resistant additive.
Each component is crushed to particle diameter less than 200 μm.
A kind of application of the boiler dirt-resistant additive obtained using preparation method as described above, the additive is used for coal dust
The dirt-resistant of boiler or fluidized-bed combustion boiler.
When boiler is pulverized-coal fired boiler, the application comprises the following steps：The additive prepared and fire coal are sent in the lump
Enter coal pulverizer to be crushed and mixed, obtained mixture sequentially passes through mill separator, pulverized-coal collector and separated, then
Storage, when in use, pulverized-coal fired boiler is sent into by powder feeding blower fan.
When boiler is fluidized-bed combustion boiler, the application comprises the following steps：By the additive prepared and desulfurizing agent powder
Material mixing storage, then sends into fluidized-bed combustion boiler by powder feeding blower fan.
Using when, the weight ratio of fuel and additive is 100 in the pulverized-coal fired boiler or fluidized-bed combustion boiler：(0.1~3).
Compared with prior art, beneficial effects of the present invention are embodied in following several respects：
(1) patent formulation has more preferable soil resistant effect and coal adaptability；
(2) prepare simple, using simple, application prospect is big.
Embodiment
Embodiments of the invention are elaborated below, the present embodiment is carried out lower premised on technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementations
Example.
Embodiment 1
Prepare boiler dirt-resistant additive of the present invention：The dirt-resistant additive of the present embodiment presses MnWO430 parts, Al3
(SiO3)325 parts, SiO215 parts, Al2O310 parts, Cr2O315 parts, MnO25 parts of mass fraction is prepared.
Preparation method：Each component is first crushed to maximum particle diameter less than 200 μm, then again by each component according to mass fraction
It is well mixed.
The application method of this dirt-resistant additive is as follows：
By the additive prepared and coal-fired feeding coal pulverizer in the lump with realize fuel and additive it is fully broken with it is mixed
Close, mixture sequentially passes through mill separator, pulverized-coal collector, is ultimately stored on coal store, the quilt in the presence of powder feeding blower fan
Send into boiler.
The usage amount of boiler dirt-resistant additive of the present invention is：The mass ratio of this additive and boiler oil is 0.2:
100。
The boiler dirt-resistant additive application that the present embodiment is provided is to certain 350MW lignite station boiler (pulverized-coal fired boiler)
On, monitored, as a result shown under conditions of steam generator system is normally run by long-play：Ash content is with alkali metal aluminosilicate
The ratio that form is present is 93%, measures ash fusion point for 1507 DEG C, reduces the dust stratification as caused by alkali vapor, slagging and heat-transfer surface
Etching problem, improves the utilization ratio of boiler plant, prolonged boiler life-span.Boiler continuous operating time reaches 273 days, during which
Boiler items service data normal table.
Embodiment 2
Using formula and preparation method similar to Example 1, difference is：
(1) parts by weight of each component are as follows：MnWO435 parts, Al3(SiO3)320 parts, SiO220 parts, Al2O315 parts,
Cr2O320 parts, MnO210 parts；(2) additive obtained by the present embodiment is used for certain 135MW bituminous rock circulating fluidized bed boiler of power station,
The mass ratio of additive and boiler oil is 0.1: 100.
(3) application process:The additive prepared is mixed with desulfurizing agent powder and is stored in desulfurizing agent feed bin, is then passed through
Convey wind feeding fluidized-bed combustion boiler.
Through actual test, the ratio that ash content is present in alkali metal aluminosilicate form is 88%, and it is 1485 to measure ash fusion point
DEG C, the dust stratification as caused by alkali vapor, slagging and heat-transfer surface etching problem are equally reduced, the utilization ratio of equipment is improved, prolongs
Boiler life is grown.Boiler continuous operating time reaches 250 days, during which the every service data normal table of boiler.
Embodiment 3
Using formula similar to Example 1 and preparation method and application method, difference is：
(1) parts by weight of each component are as follows：MnWO425 parts, Al3(SiO3)330 parts, SiO210 parts, Al2O35 parts,
Cr2O310 parts, MnO21 part；
(2) mass ratio of additive and boiler oil is 3: 100.
Through actual test, the ratio that ash content is present in alkali metal aluminosilicate form is 90%, and it is 1489 to measure ash fusion point
DEG C, the dust stratification as caused by alkali vapor, slagging and heat-transfer surface etching problem are equally reduced, improve boiler plant utilizes effect
Rate, extends boiler life.Boiler continuous operating time reaches 266 days, during which the every service data normal table of boiler.
Claims (7)
1. a kind of boiler dirt-resistant additive, it is characterised in that the additive includes the component of following parts by weight：
2. a kind of preparation method of boiler dirt-resistant additive as claimed in claim 1, it is characterised in that the preparation method
Comprise the following steps：Each component is crushed, it is then well mixed according to parts by weight, produce the boiler dirt-resistant additive.
3. the preparation method of a kind of boiler dirt-resistant additive according to claim 2, it is characterised in that each component is crushed
It is less than 200 μm to particle diameter.
4. a kind of application of the boiler dirt-resistant additive obtained using the preparation method as described in Claims 2 or 3, its feature is existed
In the additive is used for the dirt-resistant of pulverized-coal fired boiler or fluidized-bed combustion boiler.
5. the application of a kind of boiler dirt-resistant additive according to claim 4, it is characterised in that when boiler is coal dust pot
During stove, the application comprises the following steps：The additive prepared and the coal-fired coal pulverizer of feeding in the lump are crushed with being mixed,
Obtained mixture sequentially passes through mill separator, pulverized-coal collector and separated, and then stores, when in use, passes through powder feeding
Blower fan sends into pulverized-coal fired boiler.
6. the application of a kind of boiler dirt-resistant additive according to claim 4, it is characterised in that when boiler is fluid bed
During boiler, the application comprises the following steps：The additive prepared is mixed into storage with desulfurizing agent powder, then passes through powder feeding
Blower fan sends into fluidized-bed combustion boiler.
7. the application of a kind of boiler dirt-resistant additive according to claim 4, it is characterised in that when applying, the coal
The weight ratio of fuel and additive is 100 in powder boiler or fluidized-bed combustion boiler：(0.1~3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710463168.XA CN107267250B (en) | 2017-06-19 | 2017-06-19 | Boiler anti-contamination additive and preparation and application thereof |
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| CN201710463168.XA CN107267250B (en) | 2017-06-19 | 2017-06-19 | Boiler anti-contamination additive and preparation and application thereof |
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| CN107267250A true CN107267250A (en) | 2017-10-20 |
| CN107267250B CN107267250B (en) | 2020-07-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107890A (en) * | 2019-04-02 | 2019-08-09 | 张正周 | A method of preventing circulating fluidized bed boiler coking |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1105698A (en) * | 1994-01-20 | 1995-07-26 | 李小江 | Slag removing agent for solid fuel boiler |
| CN1335378A (en) * | 2000-07-21 | 2002-02-13 | 罗松涛 | Long-acting coal-saving comburant |
| JP2003082356A (en) * | 2001-09-07 | 2003-03-19 | Nippon Steel Corp | Apparatus and method for water-blowing into oven top space |
| CN1667100A (en) * | 2005-03-31 | 2005-09-14 | 中国民用航空学院 | Environmental protection energy-saving coal additives |
| CN101475864A (en) * | 2009-01-19 | 2009-07-08 | 赵楠 | Non-sodium chloride environment-friendly type coal-saving combustion adjuvant special for cement |
| CN103789060A (en) * | 2012-10-31 | 2014-05-14 | 临邑县鲁晶化工有限公司 | Novel combustion improver |
| CN104164270A (en) * | 2014-07-24 | 2014-11-26 | 浙江百能科技有限公司 | Additive for improving Zhundong coal combustion and coking characteristics and use method thereof |
| CN105132075A (en) * | 2015-08-14 | 2015-12-09 | 上海理工大学 | Eastern Junggar coal slagging and contamination improvement additive and application method thereof |
-
2017
- 2017-06-19 CN CN201710463168.XA patent/CN107267250B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1105698A (en) * | 1994-01-20 | 1995-07-26 | 李小江 | Slag removing agent for solid fuel boiler |
| CN1335378A (en) * | 2000-07-21 | 2002-02-13 | 罗松涛 | Long-acting coal-saving comburant |
| JP2003082356A (en) * | 2001-09-07 | 2003-03-19 | Nippon Steel Corp | Apparatus and method for water-blowing into oven top space |
| CN1667100A (en) * | 2005-03-31 | 2005-09-14 | 中国民用航空学院 | Environmental protection energy-saving coal additives |
| CN101475864A (en) * | 2009-01-19 | 2009-07-08 | 赵楠 | Non-sodium chloride environment-friendly type coal-saving combustion adjuvant special for cement |
| CN103789060A (en) * | 2012-10-31 | 2014-05-14 | 临邑县鲁晶化工有限公司 | Novel combustion improver |
| CN104164270A (en) * | 2014-07-24 | 2014-11-26 | 浙江百能科技有限公司 | Additive for improving Zhundong coal combustion and coking characteristics and use method thereof |
| CN105132075A (en) * | 2015-08-14 | 2015-12-09 | 上海理工大学 | Eastern Junggar coal slagging and contamination improvement additive and application method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107890A (en) * | 2019-04-02 | 2019-08-09 | 张正周 | A method of preventing circulating fluidized bed boiler coking |
| CN110107890B (en) * | 2019-04-02 | 2020-06-26 | 淄博齐林贵和热电有限公司 | Method for preventing circulating fluidized bed boiler from coking |
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| CN107267250B (en) | 2020-07-24 |
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