CN108119896A - It is a kind of to improve accurate eastern coal combustion slagging, the multifuel combustion method of fouling characteristics - Google Patents
It is a kind of to improve accurate eastern coal combustion slagging, the multifuel combustion method of fouling characteristics Download PDFInfo
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- CN108119896A CN108119896A CN201711362352.1A CN201711362352A CN108119896A CN 108119896 A CN108119896 A CN 108119896A CN 201711362352 A CN201711362352 A CN 201711362352A CN 108119896 A CN108119896 A CN 108119896A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/002—Fluidised bed combustion apparatus for pulverulent solid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/22—Fuel feeders specially adapted for fluidised bed combustion apparatus
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Abstract
本发明公开了一种改善准东煤燃烧结渣、沾污特性的混烧方法，将油页岩半焦以一定比例加入准东煤中，混合均匀后，再送入燃煤锅炉中进行燃烧；各组分的质量百分比为：油页岩半焦30％‑40％，准东煤60％‑70％，各组分的最大粒径不超过150μm。本发明使用后能够有效降低准东煤碱酸比并减少煤灰中碱性氧化物含量，从而明显改善准东煤的结渣特性和沾污特性。本发明混烧原料资源丰富，廉价易得，油页岩半焦的利用对于节约土地资源和保护生态环境具有重要意义，且油页岩半焦在燃烧过程中能够产生额外的热量，对于节约能源起着积极作用。The invention discloses a co-combustion method for improving the burning slagging and pollution characteristics of Zhundong coal. Oil shale semi-coke is added to Zhundong coal in a certain proportion, mixed evenly, and then sent to a coal-fired boiler for combustion; The mass percentage of each component is: 30%-40% of oil shale semi-coke, 60%-70% of Zhundong coal, and the maximum particle size of each component is not more than 150 μm. After being used, the invention can effectively reduce the alkali-acid ratio of Zhundong coal and reduce the content of alkaline oxides in coal ash, thereby obviously improving the slagging and contamination characteristics of Zhundong coal. The co-combustion raw material resources of the present invention are abundant, cheap and easy to obtain, and the utilization of oil shale semi-coke is of great significance for saving land resources and protecting the ecological environment, and oil shale semi-coke can generate extra heat in the combustion process, which is very important for saving energy play a positive role.
Description
技术领域technical field
本发明涉及煤燃烧技术领域，具体涉及一种改善准东煤燃烧结渣、沾污特性的混烧方法。The invention relates to the technical field of coal combustion, in particular to a co-firing method for improving the slagging and contamination characteristics of Zhundong coal combustion.
背景技术Background technique
准东煤田是是我国目前最大的整装煤田，煤炭资源预测储量3900亿t，以现在我国煤炭年产量计算，一个准东煤田可供全国使用100年。作为新疆地区四大煤源之一，准东煤已经成为乌昌地区各发电企业的主要用煤。准东煤燃点低，燃尽率高，燃烧经济性高，污染排放低，是优良的动力用煤。The Zhundong Coalfield is currently the largest coal-packed coalfield in my country, with a predicted reserve of 390 billion tons of coal resources. Based on the current annual coal production in my country, one Zhundong Coalfield can be used by the whole country for 100 years. As one of the four major coal sources in Xinjiang, Zhundong coal has become the main coal used by power generation companies in Wuchang. Zhundong coal has a low ignition point, high burnout rate, high combustion economy, and low pollution emissions. It is an excellent power coal.
但是由于准东煤碱金属氧化钠的含量总体都在2％以上，导致燃用准东煤的锅炉出现结渣、沾污等问题，严重影响了锅炉的正常运行，致使大量开采成本低、燃烧活性好、低污染、低排放的准东煤得不到很好的利用。目前针对准东煤结渣和沾污问题主要在锅炉燃烧方面进行缓解，如增大炉膛容积，降低炉温，增加吹灰次数，或定期停炉打焦，除渣，这些方法浪费了大量的人力物力。因此找到合适的掺烧燃料从而改善准东煤的燃烧特性具有重要意义。However, because the content of alkali metal sodium oxide in Zhundong coal is generally above 2%, problems such as slagging and contamination in boilers burning Zhundong coal have occurred, which seriously affects the normal operation of the boiler, resulting in low mining costs and high combustion efficiency. Zhundong coal with good activity, low pollution and low emission cannot be well utilized. At present, the slagging and pollution problems of Zhundong coal are mainly alleviated in the aspect of boiler combustion, such as increasing the furnace volume, lowering the furnace temperature, increasing the number of soot blowing, or regularly stopping the furnace for coking and slag removal. These methods waste a lot of energy. Human and material resources. Therefore, it is of great significance to find suitable blending fuels to improve the combustion characteristics of Zhundong coal.
另一方面，随着油页岩工业的快速发展，产生了大量的油页岩半焦，不仅占用了大量的土地资源，而且造成了周边生态环境的破坏。若能够以油页岩半焦为掺烧原料，充分、合理的利用油页岩半焦这一废渣，就能够实现油页岩半焦的资源化，解决当前油页岩半焦带来的生态环境问题。On the other hand, with the rapid development of the oil shale industry, a large amount of oil shale semi-coke is produced, which not only occupies a large amount of land resources, but also causes damage to the surrounding ecological environment. If the oil shale semi-coke can be used as the blended raw material and the waste residue of oil shale semi-coke can be fully and rationally utilized, the resource utilization of oil shale semi-coke can be realized and the ecological problems caused by the current oil shale semi-coke can be solved. Environmental issues.
发明内容Contents of the invention
为解决上述问题，本发明提供了一种改善准东煤燃烧结渣、沾污特性的混烧方法。In order to solve the above problems, the present invention provides a co-firing method for improving the combustion slagging and pollution characteristics of Zhundong coal.
为实现上述目的，本发明采取的技术方案为：In order to achieve the above object, the technical scheme that the present invention takes is:
一种改善准东煤燃烧结渣、沾污特性的混烧方法，将油页岩半焦以一定比例加入准东煤中，混合均匀后，再送入燃煤锅炉中进行燃烧；各组分的质量百分比为：油页岩半焦30％-40％，准东煤60％-70％，各组分的最大粒径不超过150μm。A co-combustion method to improve the slagging and contamination characteristics of Zhundong coal combustion. Oil shale semi-coke is added to Zhundong coal in a certain proportion, and after mixing evenly, it is sent to a coal-fired boiler for combustion; The mass percentages are: 30%-40% of oil shale semi-coke, 60%-70% of Zhundong coal, and the maximum particle size of each component is not more than 150μm.
优选地，所述准东煤为准东地区典型煤，如天池木垒煤、天池五彩湾煤、神华准东煤等，这类煤种普遍具有水分和挥发分含量较高，灰分、热值较低，灰中的铁和钠含量较高，灰熔点较低的特点。Preferably, the Zhundong coal is a typical coal in the Zhundong area, such as Tianchi Mulei coal, Tianchi Wucaiwan coal, Shenhua Zhundong coal, etc. These types of coal generally have high moisture and volatile content, ash content, and calorific value. Low, high iron and sodium content in the ash, and low ash melting point.
本发明使用后能够有效降低准东煤碱酸比并减少煤灰中碱性氧化物含量，从而明显改善准东煤的结渣特性和沾污特性。本发明混烧原料资源丰富，廉价易得，油页岩半焦的利用对于节约土地资源和保护生态环境具有重要意义，且油页岩半焦在燃烧过程中能够产生额外的热量，对于节约能源起着积极作用。After being used, the invention can effectively reduce the alkali-acid ratio of Zhundong coal and reduce the content of alkaline oxides in coal ash, thereby obviously improving the slagging and contamination characteristics of Zhundong coal. The co-combustion raw material resources of the present invention are abundant, cheap and easy to obtain, and the utilization of oil shale semi-coke is of great significance for saving land resources and protecting the ecological environment, and oil shale semi-coke can generate extra heat in the combustion process, which is very important for saving energy play a positive role.
具体实施方式Detailed ways
为了使本发明的目的及优点更加清楚明白，以下结合实施例对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。In order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
实施例1Example 1
当准东煤与油页岩半焦比例为9∶1时，碱酸比由3.085降低到0.524，沾污指数(B/A·Na2O)由19.77降低到1.68，明显改善了结渣和沾污问题。When the ratio of Zhundong coal to oil shale semi-coke is 9:1, the alkali-acid ratio decreases from 3.085 to 0.524, and the pollution index (B/A·Na 2 O) decreases from 19.77 to 1.68, which significantly improves the slagging and contamination. pollution problem.
实施例2Example 2
当准东煤与油页岩半焦比例为8∶2时，碱酸比由3.085降低到0.320，沾污指数(B/A·Na2O)由19.77降低到1.01，明显改善了结渣和沾污问题。When the ratio of Zhundong coal to oil shale semi-coke is 8:2, the alkali-acid ratio decreases from 3.085 to 0.320, and the pollution index (B/A·Na 2 O) decreases from 19.77 to 1.01, which significantly improves the slagging and contamination. pollution problem.
实施例3Example 3
当准东煤与油页岩半焦比例为7∶3时，碱酸比由3.085降低到0.313，沾污指数(B/A·Na2O)由19.77降低到0.79，明显改善了结渣和沾污问题。When the ratio of Zhundong coal to oil shale semi-coke was 7:3, the alkali-acid ratio decreased from 3.085 to 0.313, and the pollution index (B/A·Na 2 O) decreased from 19.77 to 0.79, which significantly improved the slagging and contamination. pollution problem.
实施例4Example 4
当准东煤与油页岩半焦比例为6∶4时，碱酸比由3.085降低到0.289，沾污指数(B/A·Na2O)由19.77降低到0.72，明显改善了结渣和沾污问题。When the ratio of Zhundong coal to oil shale semi-coke is 6:4, the alkali-acid ratio decreases from 3.085 to 0.289, and the pollution index (B/A·Na 2 O) decreases from 19.77 to 0.72, which significantly improves the slagging and contamination. pollution problem.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.
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Cited By (1)
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| CN110107890A (en) * | 2019-04-02 | 2019-08-09 | 张正周 | A method of preventing circulating fluidized bed boiler coking |
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Application publication date: 20180605 |