CN201170547Y - Oxygen-increasing combustion-supporting device for circulating fluidized bed coal-fired power boiler - Google Patents
Oxygen-increasing combustion-supporting device for circulating fluidized bed coal-fired power boiler Download PDFInfo
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- CN201170547Y CN201170547Y CNU200720158963XU CN200720158963U CN201170547Y CN 201170547 Y CN201170547 Y CN 201170547Y CN U200720158963X U CNU200720158963X U CN U200720158963XU CN 200720158963 U CN200720158963 U CN 200720158963U CN 201170547 Y CN201170547 Y CN 201170547Y
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
本实用新型涉及一种用于循环流化床燃煤发电锅炉的增氧助燃装置，包括顺次连接的过滤器(1)、风机(2)、膜分离器(3)、泵(4)、脱湿器(5)，在脱湿器(5)后连接有预热装置(6)，预热装置(6)内设有富氧输送管，输送管的输入端连接脱湿器(5)的出口、输送管的输出端端口处连接有富氧喷嘴(7)。该装置将富氧以二次风的方式送入炉膛，增加炉内整体或部分氧气含量，减少炉内整体空气过剩系数，有效降低由于空气过剩系数大时过剩的空气系数将热量带走，降低排烟温度；同时由于富氧的增加，可以提高着火的条件，燃烧完全，在节煤的同时也保证了环保的效果。
The utility model relates to an oxygen-increasing combustion-supporting device for a circulating fluidized bed coal-fired power generation boiler, comprising a filter (1), a fan (2), a membrane separator (3), a pump (4), The dehumidifier (5) is connected with a preheating device (6) behind the dehumidifier (5). The preheating device (6) is provided with an oxygen-enriched delivery pipe, and the input end of the delivery pipe is connected to the dehumidifier (5). Oxygen-enriched nozzles (7) are connected at the outlet of the outlet and the output port of the delivery pipe. The device sends enriched oxygen into the furnace in the form of secondary air, increases the overall or partial oxygen content in the furnace, reduces the overall air excess coefficient in the furnace, and effectively reduces the heat taken away by the excess air coefficient when the air excess coefficient is large, reducing the At the same time, due to the increase of oxygen enrichment, the conditions for ignition can be improved, the combustion is complete, and the effect of environmental protection is guaranteed while saving coal.
Description
技术领域 technical field
本实用新型属锅炉助燃装置，具体为用于循环流化床燃煤发电锅炉的增氧助燃装置。The utility model belongs to a combustion-supporting device for a boiler, in particular to an oxygen-increasing combustion-supporting device for a circulating fluidized bed coal-fired power generation boiler.
背景技术 Background technique
循环流化床锅炉是近十几年发展起来的一项高效、低污染清洁燃烧技术，因它在燃烧室出口安装了特有的气固分离器、返料循环等装置，使其具有了低温的动力控制燃烧；高速度、高浓度、热量、质量和动量传递过程等技术特点，同时也具有节能、环保等许多优点。因其具有燃烧效率高、煤种适应性广、烟气中有害气体排放浓度低、负荷调节范围大、灰渣可综合利用等优点，在当今日益严峻的能源紧缺和环境保护要求下，在国内外得到了迅速的发展，已商品化，正在向大型化发展。Circulating fluidized bed boiler is a high-efficiency, low-pollution and clean combustion technology developed in the past ten years. It has a low-temperature Power controlled combustion; technical characteristics such as high speed, high concentration, heat, mass and momentum transfer process, and also has many advantages such as energy saving and environmental protection. Because of its advantages such as high combustion efficiency, wide adaptability of coal types, low concentration of harmful gas emissions in flue gas, large load adjustment range, and comprehensive utilization of ash and slag, under the increasingly severe energy shortage and environmental protection requirements, it is widely used in China. The watch has developed rapidly, has been commercialized, and is developing towards large-scale.
循环流化床锅炉内燃料的燃尽度很高，理论上性能良好的循环流化床锅炉燃烧效率可达90～95％以上。但由于种种原因，实际效率很难到达设计的水平，存在着一定的节能潜力。分析表明，炉膛二次风上部有一个的贫氧核心区，这是由于二次风的穿透扩散效果不佳而使氧气不能到达炉膛中部的结果，这对于核心区细颗粒的燃烧产生了负面影响。实践表明，当锅炉燃烧的气体氧气量达到25％以上时，节能高达20％；锅炉启动升温时间缩短1/2-2/3。The burnout degree of the fuel in the circulating fluidized bed boiler is very high. Theoretically, the combustion efficiency of the circulating fluidized bed boiler with good performance can reach more than 90-95%. However, due to various reasons, the actual efficiency is difficult to reach the design level, and there is a certain energy-saving potential. The analysis shows that there is an oxygen-deficient core area in the upper part of the secondary air in the furnace. This is the result of poor penetration and diffusion of the secondary air so that oxygen cannot reach the middle of the furnace, which has a negative impact on the combustion of fine particles in the core area. Influence. Practice has shown that when the amount of oxygen in the gas burned by the boiler reaches more than 25%, the energy saving is as high as 20%; the heating time of the boiler is shortened by 1/2-2/3.
发明内容 Contents of the invention
为了克服现有的锅炉燃烧技术的不足，本实用新型提供一种用于循环流化床燃煤发电锅炉的增氧助燃装置，该装置将富氧以二次风的方式送入炉膛，增加炉内整体或部分氧气含量，减少炉内整体空气过剩系数，有效降低由于空气过剩系数大时过剩的空气系数将热量带走，降低排烟温度。由于富氧的增加，可以提高着火的条件，燃烧完全，在节煤的同时也保证了环保的效果。In order to overcome the shortcomings of the existing boiler combustion technology, the utility model provides an oxygen-increasing combustion-supporting device for a circulating fluidized bed coal-fired power boiler. The overall or partial oxygen content in the furnace can reduce the overall air excess coefficient in the furnace, effectively reduce the heat taken away by the excess air coefficient when the air excess coefficient is large, and reduce the exhaust gas temperature. Due to the increase of oxygen enrichment, the conditions for ignition can be improved, the combustion is complete, and the effect of environmental protection is guaranteed while saving coal.
本实用新型解决其技术问题所采用的技术方案是：一种用于循环流化床燃煤发电锅炉的增氧助燃装置，包括顺次连接的过滤器、风机、膜分离器、泵、脱湿器，在脱湿器后连接有预热装置，预热装置内设有富氧输送管，输送管的输入端连接脱湿器的出口、输送管的输出端端口处连接有富氧喷嘴。The technical scheme adopted by the utility model to solve the technical problem is: an oxygen-increasing and combustion-supporting device for a circulating fluidized bed coal-fired power generation boiler, including a filter, a fan, a membrane separator, a pump, a dehumidifier connected in sequence A preheating device is connected behind the dehumidifier, and an oxygen-enriched delivery pipe is arranged in the preheater. The input end of the delivery pipe is connected to the outlet of the dehumidifier, and the output port of the delivery pipe is connected to an oxygen-enriched nozzle.
上述的用于循环流化床燃煤发电锅炉的增氧助燃装置，预热装置为在锅炉的排渣管内设有富氧输送管；富氧输送管从预热装置输出后设于二次风管内，二者形成管中管的形式将富氧送入炉膛内；富氧输送管设于最底层二次风管内；前墙、后墙至少设有三个富氧输送管。For the above-mentioned oxygen-increasing combustion-supporting device for a circulating fluidized bed coal-fired power generation boiler, the preheating device is provided with an oxygen-enriched delivery pipe in the slag discharge pipe of the boiler; In the pipe, the two form a pipe-in-pipe form to feed oxygen-enriched into the furnace; the oxygen-enriched delivery pipe is arranged in the secondary air duct at the bottom; at least three oxygen-enriched delivery pipes are provided on the front wall and the rear wall.
本实用新型的设计特点及有益效果表现在：由于富氧的增加，可以提高着火的条件，燃烧完全，在节煤的同时也保证了环保的效果。The design features and beneficial effects of the utility model are as follows: due to the increase of oxygen enrichment, the conditions for ignition can be improved, the combustion is complete, and the effect of environmental protection is guaranteed while saving coal.
设置的预热系统有效降低由于空气过剩系数大时过剩的空气系数将热量带走，降低排烟温度；既冷却了炉渣，减轻了锅炉冷渣机的负担，又充分利用了热损，还达到了加热富氧的要求。The set preheating system effectively reduces the excess air coefficient to take away the heat due to the large air excess coefficient, and reduces the exhaust gas temperature; it not only cools the slag, reduces the burden of the boiler slag cooler, but also makes full use of the heat loss, and also achieves meet the requirements of heating oxygen enrichment.
富氧燃烧技术不仅能使分离收集CO和处理SO容易进行，还能减少NOX排放，是一种能够综合控制燃煤污染物排放的新型洁净燃烧技术。Oxygen-enriched combustion technology not only makes it easy to separate and collect CO and process SO, but also reduces NOX emissions. It is a new clean combustion technology that can comprehensively control coal-burning pollutant emissions.
附图说明 Description of drawings
图1为本实用新型构造的示意图。Fig. 1 is the schematic diagram of the structure of the utility model.
具体实施方式 Detailed ways
如图1所示，1是过滤器，2是风机，3是膜分离器，4是泵，5是脱湿器，6是预热装置，7是富氧喷嘴。As shown in Figure 1, 1 is a filter, 2 is a fan, 3 is a membrane separator, 4 is a pump, 5 is a dehumidifier, 6 is a preheating device, and 7 is an oxygen-enriched nozzle.
一种用于循环流化床燃煤发电锅炉的增氧助燃装置，包括顺次连接的过滤器1、风机2、膜分离器3、泵4、脱湿器5，在脱湿器5后连接有预热装置6，预热装置6内设有富氧输送管，输送管的输入端连接脱湿器5的出口、输送管的输出端端口处连接有富氧喷嘴7。An oxygen-increasing combustion-supporting device for a circulating fluidized bed coal-fired power generation boiler, including a filter 1, a
上述的用于循环流化床燃煤发电锅炉的增氧助燃装置，预热装置6为在锅炉的排渣管内设有富氧输送管。In the aforementioned oxygen-increasing and combustion-supporting device for a circulating fluidized bed coal-fired power boiler, the
富氧输送管从预热装置6输出后设于二次风管内，二者形成管中管的形式将富氧送入炉膛内；富氧输送管设于最底层二次风管内，前墙设置五个送风点、后墙设置六个送风点。富氧喷嘴采用耐热喷嘴，为确保富氧穿透力，风压大于二次风压及炉膛压力。The oxygen-enriched delivery pipe is installed in the secondary air duct after output from the
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| CNU200720158963XU CN201170547Y (en) | 2007-12-17 | 2007-12-17 | Oxygen-increasing combustion-supporting device for circulating fluidized bed coal-fired power boiler |
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| CNU200720158963XU CN201170547Y (en) | 2007-12-17 | 2007-12-17 | Oxygen-increasing combustion-supporting device for circulating fluidized bed coal-fired power boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588996A (en) * | 2012-03-07 | 2012-07-18 | 上海锅炉厂有限公司 | Oxygen-enriched combustion system |
| CN102628590A (en) * | 2012-03-20 | 2012-08-08 | 广东电网公司电力科学研究院 | Biomass circulating fluidized bed direct combustion apparatus |
| CN102927566A (en) * | 2012-11-15 | 2013-02-13 | 辽宁省电力有限公司电力科学研究院 | Correcting method for secondary air quantity curve of conventional boiler after local oxygen-enriched combustion transformation |
-
2007
- 2007-12-17 CN CNU200720158963XU patent/CN201170547Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588996A (en) * | 2012-03-07 | 2012-07-18 | 上海锅炉厂有限公司 | Oxygen-enriched combustion system |
| CN102588996B (en) * | 2012-03-07 | 2015-02-18 | 上海锅炉厂有限公司 | Oxygen-enriched combustion system |
| CN102628590A (en) * | 2012-03-20 | 2012-08-08 | 广东电网公司电力科学研究院 | Biomass circulating fluidized bed direct combustion apparatus |
| CN102628590B (en) * | 2012-03-20 | 2014-09-17 | 广东电网公司电力科学研究院 | Biomass circulating fluidized bed direct combustion apparatus |
| CN102927566A (en) * | 2012-11-15 | 2013-02-13 | 辽宁省电力有限公司电力科学研究院 | Correcting method for secondary air quantity curve of conventional boiler after local oxygen-enriched combustion transformation |
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Granted publication date: 20081224 Termination date: 20100118 |