CN104371790B - Additive for inhibiting alkali metal release in Zhundong high-sodium coal combustion and realization method thereof - Google Patents
Additive for inhibiting alkali metal release in Zhundong high-sodium coal combustion and realization method thereof Download PDFInfo
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- CN104371790B CN104371790B CN201410546845.0A CN201410546845A CN104371790B CN 104371790 B CN104371790 B CN 104371790B CN 201410546845 A CN201410546845 A CN 201410546845A CN 104371790 B CN104371790 B CN 104371790B
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- metal release
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Abstract
The invention relates to an additive for inhibiting alkali metal release in Zhundong high-sodium coal combustion and a realization method thereof. The additive comprises the following components and the corresponding mass percentages: 10-55% of kaolin, 0-15% of bentonite, 5-20% of diatomite, 15-60% of micalex, 10-50% of pyrophyllite, 0-15% of sepiolite, and 0-15% of quartz sand. The additive has the beneficial effects that the additive can effectively inhibit more than 70% of alkali metal release through being mixed with coal, and significantly improves the ash melting characteristics of the coal; with flexible use of some cheap inorganic minerals as effective ingredients of the additive, the slagging and corrosion problems produced during the high-sodium coal combustion process are solved; safe operation of combustion equipment is effectively ensured; and the additive is both economical and convenient, and can be widely applied to high-sodium coal combustion thermal power stations, coal chemical industry, blast furnace ironmaking and other industries.
Description
Technical field
The present invention relates to a kind of suppress the additive and its implementation that alkali metal discharges in accurate eastern high sodium coal combustion.
Background technology
In recent years China is found that large quantities of coal resources in the detection of the area such as Xinjiang.By taking the Zhun Dong coalfields of Xinjiang as an example, its is pre-
Reserves are surveyed up to 390,000,000,000 tons.By China's 3,600,000,000 tons of calculating of consumption of coal total amount in 2013, the coal resources in quasi- east area can ensure
The whole nation uses more than 100 years, with important energy strategy status.Consider from resources characteristic angle, quasi- east coal is a kind of hyperpyrexia
Value, low ash, low-sulfur coal, with good combustion characteristics, but its alkali metallic sodium content is high, is more than 5 times of common coal.
During coal cracking, gasification and burning etc., the alkali metal in coal can be discharged in a gaseous form.On the one hand,
Gaseous alkali metal is easy to be condensed in burner hearth and flue heat-exchanger surface, forms viscous silk fabric shape liquid film, and then accelerates solid in flue gas
Body particle brings serious threat in the enrichment of heat-transfer surface and the formation of dirt to high efficiency boiler heat exchange and safe operation.The opposing party
Face, in PFBC-IGCC (IGCC) system or other Clean Coal Power Generating Technologies, the alkali gold discharged from coal
Category steam can produce heat erosion to gas turbine blades, have a strong impact on the safe handling of IGCC gas turbine engine systems.Therefore, for
For using accurate eastern high sodium coal, in order to ensure the safe and highly efficient operation of boiler or IGCC gas turbines, it is necessary to effectively suppress coal to split
Alkali metal release in solution, gasification and combustion process.
It is domestic and international at present that the research that alkali metal in coal cracking, gasification and combustion process is discharged in terms of suppression is mainly limited to
The understanding of process and releasing mechanism is discharged to alkali metal, finding report still rests on theoretical research aspect mostly, to related actual
Control device research is less, about the additive and implementation method of alkali metal release in suppression coal cracking, gasification and combustion process
Patent there is not been reported.
The content of the invention
The technical problem to be solved in the present invention is to overcome deficiency of the prior art, there is provided one kind suppresses accurate eastern high sodium coal
The additive and its implementation of alkali metal release in burning.
To solve technical problem, the solution of the present invention is：
A kind of additive for suppressing alkali metal release in accurate eastern high sodium coal combustion is provided, in the additive each component and its
Corresponding weight/mass percentage composition is as follows：
The implementation method of the additive of alkali metal release in the accurate eastern high sodium coal combustion of the suppression, institute are also provided in the present invention
State implementation method one：
Additive is mixed with coal total amount with 0.5～5%: 1 quality proportioning, coal pulverizer is then sent in the lump with reality
Existing coal and additive are fully crushed and mixed, and mixture is sequentially passed through after mill separator, pulverized-coal collector processed
Separation product be stored in coal store, in the presence of Powder discharging fan by separation product send into boiler in burner carry out fully
Burning；
Or, the implementation method two：
It is R90=5～30% that additive is milled to into fineness, then matches somebody with somebody the additive after grinding with quality with coal dust
Than sending into coal dust air channel for 0.5～5%: 1, it is sufficiently mixed with coal dust in flowing, the burner in boiler is subsequently sent in the lump
Fully burnt.
Compared with prior art, the invention has the beneficial effects as follows：
The additive can effectively suppress more than 70% alkali metal to discharge with coal blending burning, and it is molten to significantly improve the ash of coal
Melt characteristic；Flexibly make use of some cheap inorganic minerals as additive active ingredient, solve and use during high sodium coal
The slagging scorification etching problem of generation；The safe operation of effective guarantee combustion apparatus；Not only economic but also convenience, can be widely applied to use height
The industries such as the heat power station of sodium coal, Coal Chemical Industry and blast furnace ironmaking.
Description of the drawings
Fig. 1 is the middle schematic diagram of storage formula pulverized coal combustion system additive embodiment party rule 1；
Fig. 2 is the middle schematic diagram of storage formula pulverized coal combustion system additive embodiment party rule 2；
Fig. 3 is the direct-firing schematic diagram of pulverized coal combustion system additive embodiment party rule 1；
Fig. 4 is the direct-firing schematic diagram of pulverized coal combustion system additive embodiment party rule 2；
Reference：1 additive feeder；2 feeders；3 coal pulverizers；4 mill separators；5 Powder discharging fans；6 fine powders point
From device；7 coal stores；8 machine supplying powders；9 burners；10 boilers；11 pressure fan；12 air preheaters；
13 additive feeders；14 feeders；15 coal pulverizers；16 mill separators；17 Powder discharging fans；18 fine powders are separated
Device；19 coal stores；20 machine supplying powders；21 burners；22 boilers；23 pressure fan；24 air preheaters；
25 additive feeders；26 feeders；27 coal pulverizers；28 separators；29 Powder discharging fans；30 burners；31 boilers；
32 pressure fan；33 air preheaters；
34 additive feeders；35 feeders；36 coal pulverizers；37 separators；38 Powder discharging fans；39 burners；40 boilers；
41 pressure fan；42 air preheaters.
Specific embodiment
Clear, complete description will be carried out to the technical scheme in the embodiment of the present invention below, it is clear that described embodiment
Only it is a part of example of invention, rather than the case study on implementation of whole.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment 1：
The embodiment of the present invention provides the additive of alkali metal release in a kind of accurate eastern high sodium coal combustion of suppression, the additive
Middle each component and its corresponding weight/mass percentage composition are as follows：
Fig. 1 shows according to embodiments of the present invention 1 middle storage formula pulverized coal combustion system additive blending treating method.At this
In embodiment, it is only necessary to increase additive feeding system and its supporting addition in the ball type pulverizer system of existing power station operation
Agent storage warehouse.
Its course of work is illustrated below：First according to coal-supplying amount and blending mass fraction 0.5% come determine additive to
Doses.When feeder 2 carries out being operated to coal to coal pulverizer 3, feeding operation is carried out by additive feeder 1 simultaneously.Raw coal
Broken stirring is carried out in coal pulverizer 3 to realize being sufficiently mixed with additive；Then in turn through mill separator 4, fine powder point
After being processed from device 6, make coal dust and additive agent mixture meet the requirement that fineness is R90=5～30%, be then fed into coal storage
Storehouse 7 stores, most after Jing machine supplying powders 8 by air send into boiler 10 in burner 9 fully burnt, realize to combustion process
The suppression of middle alkali metal release；
Embodiment 2：
The embodiment of the present invention provides the additive of alkali metal release in a kind of accurate eastern high sodium coal combustion of suppression, the additive
Middle each component and its corresponding weight/mass percentage composition are as follows：
Fig. 2 shows according to embodiments of the present invention 2 middle storage formula pulverized coal combustion system additive blending treating method.At this
In embodiment, it is only necessary to increase additive crushing system and its supporting storage in the ball type pulverizer system of existing power station operation
Storehouse, feeding system etc..
Its course of work is illustrated below：Determine additive first according to coal-supplying amount and blending mass fraction 1% to be fed
Amount, while the additive is milled to into the fineness (R90=5～30%) of existing use coal dust beforehand through crushing system；In feeder
When 14 pairs of coal pulverizers 15 carry out being operated to coal, raw coal carries out broken stirring in coal pulverizer 15；Separate then in turn through meal
After device 16, pulverized-coal collector 18 are processed, by batcher 13 by the additive of required quality and through broken stir process
Rear raw coal sends into coal store 19 simultaneously, realizes that additive is sufficiently mixed with coal dust in flowing, most after Jing machine supplying powders 20 pass through
The burner 21 that air is sent in boiler 22 is fully burnt, and realizes the suppression to alkali metal release in combustion process；
Embodiment 3：
The embodiment of the present invention provides the additive of alkali metal release in a kind of accurate eastern high sodium coal combustion of suppression, the additive
Middle each component and its corresponding weight/mass percentage composition are as follows：
Fig. 3 shows according to embodiments of the present invention 3 direct-firing pulverized coal combustion system additive blending treating method.At this
In embodiment, it is only necessary to increase additive feeding system and its supporting addition in the unit pulverized-coal system of existing power station operation
Agent storage warehouse.
Its course of work is illustrated below：Determine additive first according to coal-supplying amount and blending mass fraction 3% to be fed
Amount.When feeder 26 carries out being operated to coal to coal pulverizer 27, feeding operation is carried out by additive feeder 25 simultaneously.Raw coal
Broken stirring is carried out in coal pulverizer 27 to realize being sufficiently mixed with additive；Processed then in turn through separator 28
Afterwards, make coal dust and additive agent mixture meet the requirement that fineness is R90=5～30%, then in the lump boiler sent into by air
Burner 30 in 31 is fully burnt, and realizes the suppression to alkali metal release in combustion process；
Embodiment 4：
The embodiment of the present invention provides the additive of alkali metal release in a kind of accurate eastern high sodium coal combustion of suppression, the additive
Middle each component and its corresponding weight/mass percentage composition are as follows：
Fig. 4 shows according to embodiments of the present invention 4 direct-firing pulverized coal combustion system additive blending treating method.At this
In embodiment, it is only necessary to increase additive crushing system and its supporting storage in the unit pulverized-coal system of existing power station operation
Storehouse, feeding system etc..
Its course of work is illustrated below：Determine additive first according to coal-supplying amount and blending mass fraction 5% to be fed
Amount, additive is milled to the fineness (R90=5～30%) of existing use coal dust beforehand through crushing system, by feeder 35 to coal-grinding
Machine 36 carries out being operated to coal, and raw coal carries out fully broken stirring in coal pulverizer 36, then after separator 37 is processed,
The additive of required quality and the raw coal after broken stir process are sent into by Powder discharging fan 38 by batcher 34 simultaneously, it is real
Now additive is sufficiently mixed with coal dust in flowing, and then sending into the burner 39 in boiler 40 by air in the lump is carried out fully
Burning, realizes the suppression to alkali metal release in combustion process；
Therefore, actual range of the invention not only includes the disclosed embodiments, is additionally included under claims real
Apply or perform all equivalents of the present invention.
Claims (2)
1. it is a kind of to suppress the additive that alkali metal discharges in accurate eastern high sodium coal combustion, it is characterised in that each group in the additive
Divide and its corresponding weight/mass percentage composition is as follows：
2. in a kind of accurate eastern high sodium coal combustion of suppression based on described in claim 1 additive of alkali metal release realization side
Method, it is characterised in that the implementation method one：
Additive is mixed with coal total amount with 0.5～5%: 1 quality proportioning, coal pulverizer is then sent in the lump to realize coal
It is fully broken with additive and mix, mixture is sequentially passed through after mill separator, pulverized-coal collector are processed and is obtained
Separation product is simultaneously stored in coal store, and separation product is the additive and coal dust for meeting fineness requirement, in the effect of Powder discharging fan
Burner in the lower feeding boiler by separation product is fully burnt；
Or, the implementation method two：
It is R90=5～30% that additive is milled to into fineness, is then with quality proportioning with coal dust by the additive after grinding
Send into coal dust air channel at 0.5～5%: 1, is sufficiently mixed with coal dust in flowing, and the burner subsequently sent in the lump in boiler is carried out
Fully burning.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410546845.0A CN104371790B (en) | 2014-10-16 | 2014-10-16 | Additive for inhibiting alkali metal release in Zhundong high-sodium coal combustion and realization method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410546845.0A CN104371790B (en) | 2014-10-16 | 2014-10-16 | Additive for inhibiting alkali metal release in Zhundong high-sodium coal combustion and realization method thereof |
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| CN104371790A CN104371790A (en) | 2015-02-25 |
| CN104371790B true CN104371790B (en) | 2017-05-10 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103540382A (en) * | 2013-09-13 | 2014-01-29 | 华中科技大学 | Coal-burning additive for reducing emission of fine particles and heavy metals and preparation method thereof |
| CN103627468A (en) * | 2013-07-31 | 2014-03-12 | 陈方 | Novel decoking agent for fire coal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104114681B (en) * | 2011-12-21 | 2017-05-31 | 肯塔基州-田纳西州粘土公司 | For avoiding as the problems such as gathering, deposit, corrode and reduced the mineral additive blend composition of emission and the operation method of burner |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627468A (en) * | 2013-07-31 | 2014-03-12 | 陈方 | Novel decoking agent for fire coal |
| CN103540382A (en) * | 2013-09-13 | 2014-01-29 | 华中科技大学 | Coal-burning additive for reducing emission of fine particles and heavy metals and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 高钠煤燃烧利用现状;张守玉等;《中国电机工程学报》;20130215;第33卷(第5期);第1-12页 * |
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