CN105419903B - It is a kind of suitable for cinder quenching and tempering type coke-removing agent of high sodium coal and preparation method and application - Google Patents
It is a kind of suitable for cinder quenching and tempering type coke-removing agent of high sodium coal and preparation method and application Download PDFInfo
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- CN105419903B CN105419903B CN201510695706.9A CN201510695706A CN105419903B CN 105419903 B CN105419903 B CN 105419903B CN 201510695706 A CN201510695706 A CN 201510695706A CN 105419903 B CN105419903 B CN 105419903B
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Abstract
The present invention relates to a kind of suitable for cinder quenching and tempering type coke-removing agent of high sodium coal and preparation method and application, the coke-removing agent raw material components are as follows：The compound 1%~90% of magnesium, kaolin 1%~85%, bentonite 0%~92%, the compound 0.5%~20% of copper, oxidant 0.1%~20%, catalyst 0.1%~10%, dispersant 0.5%~3%.The compound of the magnesium of the present invention, kaolin, bentonite, the compound of copper, oxidant, catalyst, the proportion of composing of each material of dispersant, it is set both to have promoted slagging to come off in high sodium coal combustion process, the formation of low-temperature eutectic thing can be avoided again, avoid the generation of coking, the release of alkali metal in high sodium coal combustion process can effectively be made, change cinder chemical analysis and physical arrangement by participating in burning, prevent or mitigate contamination, the coking of boiler heating surface.
Description
Technical field
The present invention relates to a kind of suitable for cinder quenching and tempering type coke-removing agent of high sodium coal and preparation method and application, belong to and remove
Burnt agent technical field.
Background technology
Xinjiang possesses the coal resources of very abundant and concentrated very much, predicts about 2.19 trillion tons of total resources, accounts for
The 40.5% of China's prediction coal total resources.Xinjiang just turns into the whole nation at present due to containing so abundant coal resources
The focus of energy circle.These coals have the characteristics that fugitive constituent is high, ash content is few, excellent power fuel are seemed, but due to oxidation
The problems such as sodium content is too high, serious contamination, coking problem be present, easily trigger boiler shutdown coke cleaning thing in combustion
Therefore loss is huge, significantly limit the development of coal electricity industry, causes a large amount of coal resources effectively to utilize very well, make
Into the waste of resource.Currently in order to mitigate high sodium coal stain, coking, people are common to alleviate problem using burning is mixed, but by
In the limitation of mixed-fuel burning proportion, fuel cost is significantly increased.Therefore, a kind of anti-coking technology of the high sodium coal of special pin is developed,
Safe and effective high sodium coal can be utilized, be had great significance for national energy strategy.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of cinder quenching and tempering type coke-removing agent and its system suitable for high sodium coal
Preparation Method and application.
Term explanation：
High sodium coal：Refer to sodium oxide molybdena mass percent being determined for high sodium coal, sodium oxide content higher than 2% in components of coal ash
Referring to national standard：The coal ash analysis methods of GB/T 1574-2007.
Technical scheme is as follows：
A kind of cinder quenching and tempering type coke-removing agent suitable for high sodium coal, coke-removing agent raw material components and its percentage by weight composition are such as
Under：
The compound 1%~90% of magnesium, kaolin 1%~85%, bentonite 0%~92%, the compound 0.5% of copper~
20%, oxidant 0.1%~20%, catalyst 0.1%~10%, dispersant 0.5%~3%.
It is currently preferred, the compound of the magnesium for one or both of magnesium hydroxide, magnesia or magnesium chloride with
Upper combination.
Currently preferred, the compound of the copper is one kind or two in copper nitrate, copper sulphate, copper chloride or cupric oxide
Kind combination of the above.
Currently preferred, the oxidant is potassium permanganate and/or manganese oxide.
It is currently preferred, the one kind or two of the catalyst in titanium dioxide, nickel chloride, nickel nitrate or nickel oxide
Kind combination of the above.
Currently preferred, magnesium hydroxide, kaolin, the average grain diameter of manganese dioxide are 3~50 microns.
Currently preferred, the dispersant is one or both of polyamide wax, silane, magnesium silicate, silica
Combination of the above.
It is currently preferred, described kaolin mineral composition is metakaolinite, galapectite, illite, mullite,
Sial spinelle.
It is currently preferred, bentonite main component be montmorillonite, quartz, described bentonite be sodium bentonite,
Any of calcium-base bentonite, Sodium/Calcium base bentonite or two or more mixing.
It is currently preferred, suitable for the cinder quenching and tempering type coke-removing agent of high sodium coal, coke-removing agent raw material components and its weight hundred
Divide as follows than forming：
The compound 60%~90% of magnesium, kaolin 10%~30%, bentonite 1%~5%, the compound 1% of copper~
10%, oxidant 2%~10%, catalyst 0.5%~5%, dispersant 1%~2%.
It is currently preferred, suitable for the cinder quenching and tempering type coke-removing agent of high sodium coal, coke-removing agent raw material components and its weight hundred
Divide as follows than forming：
The compound 62% of magnesium, kaolin 26%, bentonite 5%, the compound 1% of copper, oxidant 2%, catalyst
2%, dispersant 2%.
It is currently preferred, suitable for the cinder quenching and tempering type coke-removing agent of high sodium coal, coke-removing agent raw material components and its weight hundred
Divide as follows than forming：
The compound 84% of magnesium, kaolin 10%, the compound 1.5% of copper, oxidant 2%, catalyst 0.5%, disperse
Agent 2%.
The preparation method of the above-mentioned cinder quenching and tempering type coke-removing agent suitable for high sodium coal, including step are as follows：
By the compound of raw material proportioning magnesium, kaolin, bentonite, the compound of copper, oxidant, catalyst and dispersant,
Above-mentioned material is well mixed, produces the cinder quenching and tempering type coke-removing agent suitable for high sodium coal of the present invention.
The present invention also proposes a kind of application of the cinder quenching and tempering type coke-removing agent suitable for high sodium coal, for the decoking of high sodium coal,
The addition of coke-removing agent is the 0.5 ‰ -10 ‰ of high sodium coal weight.
Currently preferred, concrete application method is as follows：
The coke-removing agent of the present invention is added to machine supplying powder porch or coal dust air channel by compressed air, the compressed air
Pressure is：50-500KPa, the addition of coke-removing agent are the 0.5 ‰-10 ‰ of high sodium coal weight, are mixed in course of conveying with coal dust
Close uniformly, be together sent into stove and burnt, ignition temperature is 800-1300 DEG C；
Or the coke-removing agent of the present invention is sent into injection apparatus by frequency conversion feeding screw, then sprayed into by injection apparatus in stove
Combustion zone, the injection pressure of injection apparatus are 50-1000KPa, the addition of coke-removing agent for high sodium coal weight 0.5 ‰-
10‰。
The magnesia that the compound of magnesium of the present invention is formed after decomposing has very high fusing point, can effectively carry increasing of Na coal ash
The melting temperature of slag, and in process of coal combustion, lime-ash surface is attached to, reduce the viscosity of lime-ash.Kaolin and bentonite
The concentration of vapour of an alkali metal in combustion process can effectively be controlled.The compound of copper can be destroyed effectively in cinder forming process
The lattice of the compound of iron, reduce coking mechanical strength.The presence of oxidant can promote coal dust firing abundant, lifting burning effect
Rate, catalyst can effectively promote the ratio of product in lime-ash generating process to change, and avoid the formation of low temperature fused matter.This
The use of invention coke-removing agent can effectively reduce the formation of vapour of an alkali metal in combustion process, reduce and stain, and utilize high-melting-point
Magnesium compound and catalyst lifting ash fusion point, avoid the formation of low-temperature eutectic thing, then promote coal dust efficient by oxidant
Burning, reduce the coking caused by burning is insufficient and produce, improving combustion efficiency.Finally realize that cinder is quenched, effectively reduce
Or avoid because coking caused by high sodium coal combustion influences.
Inventors have surprisingly discovered that the present invention by the compound of magnesium, kaolin, bentonite, the compound of copper, oxidant,
The coke-removing agent of catalyst, dispersant and ratio composition can substantially reduce coking degree, and not only the coke-removing agent of the present invention is fitted
High sodium coal decoking, applies also for the coal-fired decoking of plain cylindrical furnace.When the coke-removing agent of the present invention is sent into high-temperature burner hearth, quickly
It is scattered, with flow of flue gas, promote coal dust efficient burning, reduce the coking caused by burning is insufficient and produce, then lift burning
Efficiency.And physics chemical action is produced with the cinder on heating surface, the melting temperature of increasing of Na coal ash is effectively put forward, and in coal dust
In combustion process, lime-ash surface is attached to, and suppresses alkali metal release, the performance to decoking effect creates favourable condition,
The formation of low-temperature eutectic thing is avoided, reduces the viscosity of lime-ash.And flue gas takes the coke-removing agent of the present invention to Boiler Metallic surface,
Metal and inorganic salts in coke-removing agent promote slagging to come off just with slagging chemically reactive, and and can makes some vulcanizations in slagging
Ferrous iron is reduced into iron ion, reduces and gives tube wall face, can constantly remove the lime-ash newly tied, thicken lime-ash, avoids tying big Jiao.Change
Kind Combustion Operation of Boilers, the heat transfer efficiency of heating surface is greatly improved, avoids triggering fire extinguishing, blowing out because tying big burnt Automatic-falling,
Human casualty accident even occurs.So as to reach energy-conservation, safe operation purpose.The compound of the magnesium of the present invention, kaolin, swelling
Soil, the compound of copper, oxidant, catalyst, the proportion of composing of each material of dispersant are those skilled in the art by long-term
Experiment grope what is obtained, make it both to have promoted slagging to come off in high sodium coal combustion process, low-temperature eutectic thing can be avoided again
Formation, avoid the generation of coking.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, the coke-removing agent can in the high sodium coal combustion process of significant effective system alkali metal release, pass through and participate in burning and change
Cinder chemical analysis and physical arrangement, prevent or mitigate contamination, the coking of boiler heating surface；
2nd, addition is simple to operate, addition manner is flexible, can be according to scene it needs to be determined that point of addition, no complicated addition are set
It is standby；
3rd, cost is cheap.Primary raw material is cheap mineral, and storage, transportation are without particular/special requirement.
Brief description of the drawings
Fig. 1 is the frequency conversion feeding screw used during the application process of the coke-removing agent of embodiment 2 and the company of injection apparatus
Connect structural representation；
In figure, 1, pressure fan, 2, boiler body, 3, coal store, 4, machine supplying powder, 5, burner, 6, storage bin, 7, frequency conversion gives
Glassware 8, injection apparatus；
Fig. 2 be the coke-removing agent of embodiment 3 application process during the feed system structural representation that uses；
In figure, 1, pressure fan, 2, boiler body, 3, coal store, 4, machine supplying powder, 5, burner, 6, storage bin, 7, frequency conversion gives
Glassware.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.Described embodiment is only a part of example of invention, rather than whole case study on implementation.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, belongs to the scope of protection of the invention.
Embodiment 1：
A kind of cinder quenching and tempering type coke-removing agent suitable for high sodium coal, coke-removing agent raw material components and its percentage by weight composition are such as
Under：
Magnesia 62%, kaolin 26%, bentonite 5%, copper nitrate 1%, potassium permanganate 2%, nickel chloride 2%, disperse
Agent 2%.
The coke-removing agent of this hair embodiment is mixed in accurate eastern coal according to 5 ‰ ratio Direct Uniform, burnt in pilot boiler,
Ignition temperature, sampled using probe tube after steady working condition.With being not added with the accurate eastern coal of coke-removing agent pointed by the present invention in same work
Contrast is sampled under the conditions of condition in pilot boiler, its unit interval, the contamination of interior unit area, coking quality are compared with without of the invention signified
About more than 35% is reduced during the coke-removing agent addition gone out, dust stratification collecting efficiency reduces about 30%, and ash fusion point lifts about 30 DEG C.
Embodiment 2：
A kind of cinder quenching and tempering type coke-removing agent suitable for high sodium coal, coke-removing agent raw material components and its percentage by weight composition are such as
Under：
Magnesium hydroxide 87%, kaolin 10%, bentonite 0%, copper sulphate 1.5%, manganese oxide 2%, nickel nitrate 0.5%,
Dispersant 2%.
The coke-removing agent of the present embodiment is sent into injection apparatus by frequency conversion feeding screw, then sprayed into by injection apparatus in stove
Combustion zone.
Concrete application method is as follows：
Existing coal-fired plant boiler body beat burnt hole or flame-observing hole sprays into this coke-removing agent, and with frequency conversion set feed system
System, storage bin, structure by the coke-removing agent of the present embodiment as shown in figure 1, be thrown to storage bin (6), according to coal-supplying amount and blending
The addition of mass fraction 2.5 ‰ comes in the unit of account time to need to add the quality of this coke-removing agent, and frequency conversion dispenser (7) is adjusted
The whole feed ability to the unit interval, frequency conversion dispenser (7) is finally opened, coke-removing agent injection is implemented by injection apparatus (8) and launched.
Embodiment 3：
A kind of cinder quenching and tempering type coke-removing agent suitable for high sodium coal, coke-removing agent raw material components and its percentage by weight composition are such as
Under：
Magnesium chloride 70%, kaolin 13%, bentonite 10%, copper chloride 1%, potassium permanganate and manganese oxide 2%, nickel oxide
1%, dispersant 3%.
The coke-removing agent of the present embodiment is added to machine supplying powder porch or coal dust air channel, the addition of coke-removing agent by compressed air
Measure as the 0.5 ‰ of high sodium coal weight, be well mixed in course of conveying with coal dust, be together sent into stove and burnt.
Concrete application method is as follows：
In the porch of existing coal-burning power plant's machine supplying powder, supporting frequency conversion covers feeding system, storage bin to the feed system used,
Quantitatively launch coke-removing agent, structure as shown in Fig. 2 the coke-removing agent of the present embodiment is thrown into storage bin (6), according to coal-supplying amount and
The addition of blending mass fraction 5 ‰ comes in the unit of account time to need to add the quality of this coke-removing agent, by frequency conversion dispenser (7)
Adjust to the feed ability of unit interval, open feeding.
Comparative example 1
A kind of boiler disclosed in Chinese patent literature CN102786998A is anti-scorch, coke-removing agent, and making 1000kg, this is anti-scorch, removes
Burnt agent, wherein kaolin 900kg, aluminum oxide 80kg, titanium dioxide 8kg, magnesia 5kg, calcium carbonate 25kg, copper sulphate 2kg.
Application experiment example
Example 1-3 and the coke-removing agent of comparative example 1 are tested,
Test method：Embodiment 1-3 and the coke-removing agent of comparative example 1 are devoked applied to high sodium coal, pass through pressure respectively
Contracting air adds to coal dust air channel, and the addition of coke-removing agent is the 0.5 ‰ of high sodium coal weight, is mixed with coal dust in course of conveying
It is even, together it is sent into stove and is burnt, is sampled after steady working condition using probe tube.Taken under same working condition in pilot boiler
Sample is contrasted, and unit area is stained with the unit interval of contrast addition 1-3 of the embodiment of the present invention and the coke-removing agent of comparative example 1 respectively
Dirty, coking quality, as a result see the table below shown in 1：
The coking Contrast on effect of table 1
| Project | Sodium oxide molybdena | Dust stratification contamination amount (30 minutes) | Coal ash softening temperature |
| Embodiment 1 | 2.47% | Reduce 35% | 1190℃ |
| Embodiment 2 | 2.47% | Reduce 23% | 1200℃ |
| Embodiment 3 | 2.47% | Reduce 13% | 1190℃ |
| Comparative example 1 | 2.47% | Reduce 5% | 1060℃ |
As can be seen from the above table, after the 30min that burns, 1-3 of embodiment of the present invention coke-removing agent can significantly reduce dust stratification
Contamination amount, hence it is evident that coal ash softening temperature is improved, avoids the formation of low-temperature eutectic thing, reduces the viscosity of lime-ash, slagging prevention occurs,
And the coke-removing agent of comparative example 1 is markedly less than the coke-removing agent of the present invention in terms of dust stratification contamination amount is reduced, improve coal ash softening temperature,
Because high sodium coal has larger difference with contamination, Coking Mechanism caused by common fired coal combustion process in combustion, therefore
Existing coke-removing agent can not effectively alleviate the contamination of high sodium coal, coking problem, and the coke-removing agent of present invention meaning can pass through
Suppression sodium acts on and solution or alleviation contamination, coking problem with lime-ash.
Claims (7)
1. a kind of cinder quenching and tempering type coke-removing agent suitable for high sodium coal, coke-removing agent raw material components and its percentage by weight composition are such as
Under：
The compound 1%~90% of magnesium, kaolin 1%~85%, bentonite 0%~92%, the compound 0.5% of copper~
20%, oxidant 0.1%~20%, catalyst 0.1%~10%, dispersant 0.5%~3%；The compound of the magnesium is hydrogen
One or both of magnesia, magnesia or magnesium chloride combination of the above；The compound of the copper is copper nitrate, copper sulphate, chlorine
Change one or both of copper or cupric oxide combination of the above；The oxidant is potassium permanganate and/or manganese oxide；The catalyst
Selected from one or both of titanium dioxide, nickel chloride, nickel nitrate or nickel oxide combination of the above；Bentonite main component is de- to cover
Stone, quartz, described bentonite are any of sodium bentonite, calcium-base bentonite, Sodium/Calcium base bentonite or two kinds
Or two kinds mixed above.
2. the cinder quenching and tempering type coke-removing agent according to claim 1 suitable for high sodium coal, it is characterised in that magnesium hydroxide,
Kaolin, the average grain diameter of manganese dioxide are 3~50 microns.
3. the cinder quenching and tempering type coke-removing agent according to claim 1 suitable for high sodium coal, it is characterised in that described kaolinite
Native mineral composition is metakaolinite, galapectite, illite, mullite, sial spinelle.
4. the cinder quenching and tempering type coke-removing agent according to claim 1 suitable for high sodium coal, it is characterised in that coke-removing agent raw material
Component and its percentage by weight composition are as follows：
The compound 60%~90% of magnesium, kaolin 10%~30%, bentonite 1%~5%, the compound 1%~10% of copper,
Oxidant 2%~10%, catalyst 0.5%~5%, dispersant 1%~2%.
5. the cinder quenching and tempering type coke-removing agent according to claim 1 suitable for high sodium coal, it is characterised in that coke-removing agent raw material
Component and its percentage by weight composition are as follows：
The compound 62% of magnesium, kaolin 26%, bentonite 5%, the compound 1% of copper, oxidant 2%, catalyst 2%, point
Powder 2%, or coke-removing agent raw material components and its percentage by weight composition it is as follows：
The compound 84% of magnesium, kaolin 10%, the compound 1.5% of copper, oxidant 2%, catalyst 0.5%, dispersant
2%.
A kind of 6. application of the cinder quenching and tempering type coke-removing agent suitable for high sodium coal described in claim 1, for removing for high sodium coal
Jiao, the addition of coke-removing agent are the 0.5 ‰ -10 ‰ of high sodium coal weight.
7. the application of the cinder quenching and tempering type coke-removing agent according to claim 6 suitable for high sodium coal, it is characterised in that specific
Application process is as follows：
The coke-removing agent of the present invention is added to machine supplying powder porch or coal dust air channel by compressed air, the addition of coke-removing agent is height
The 0.5 ‰ -10 ‰ of sodium coal weight, are well mixed in course of conveying with coal dust, are together sent into stove and are burnt, ignition temperature
800-1300℃；
Or the coke-removing agent of the present invention is sent into injection apparatus by frequency conversion feeding screw, then sprayed into stove and burnt by injection apparatus
Region, the addition of coke-removing agent are the 0.5 ‰ -10 ‰ of high sodium coal weight.
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|---|---|---|---|
| CN201510695706.9A CN105419903B (en) | 2015-10-23 | 2015-10-23 | It is a kind of suitable for cinder quenching and tempering type coke-removing agent of high sodium coal and preparation method and application |
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|---|---|---|---|
| CN201510695706.9A CN105419903B (en) | 2015-10-23 | 2015-10-23 | It is a kind of suitable for cinder quenching and tempering type coke-removing agent of high sodium coal and preparation method and application |
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| CN105419903B true CN105419903B (en) | 2018-02-16 |
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| CN111073721B (en) * | 2019-12-04 | 2021-04-27 | 湖北美和科技有限公司 | Kaolin processing method for preparing coking inhibitor component |
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| CN113088362B (en) * | 2021-04-01 | 2022-12-02 | 廊坊宏悦化工有限责任公司 | Environment-friendly energy-saving boiler decoking and slag removing agent |
| CN115491240B (en) * | 2022-10-27 | 2024-02-27 | 江苏恒维节能减排科技服务有限公司 | Power plant boiler additive and application thereof |
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