CN203478218U - Compact type circulating fluidized bed boiler capable of cleanly combusting high-sodium coal - Google Patents

Compact type circulating fluidized bed boiler capable of cleanly combusting high-sodium coal Download PDF

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CN203478218U
CN203478218U CN201320386849.8U CN201320386849U CN203478218U CN 203478218 U CN203478218 U CN 203478218U CN 201320386849 U CN201320386849 U CN 201320386849U CN 203478218 U CN203478218 U CN 203478218U
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furnace
fluidized bed
circulating fluidized
heating surface
ash
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江建忠
黄中
肖平
徐正泉
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Huaneng Clean Energy Research Institute
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一种可清洁燃烧高钠煤的紧凑型循环流化床锅炉,包括炉膛,所述炉膛分为下部的炉膛密相区和上部的炉膛稀相区,炉膛稀相区通过分离器入口烟道接布置在锅炉炉前的旋风分离器的烟气出口,旋风分离器的排尘口通过立管连接返料器,返料器通过回料管接炉膛密相区,炉膛燃烧生成的高温烟气经炉膛稀相区内的炉内屏式受热面快速冷却,熔融飞灰得到有效凝结,从而有效减轻了尾部对流受热面的灰沉积;同时,炉内屏式受热面布置间距较大,并设置吹灰器使得积灰得到有效清理,大幅提高了锅炉运行周期,本实用新型具有结构紧凑、便于模块化设计和放大的特点,合理利用了锅炉的钢架结构,适合于作为高钠煤的大规模利用技术。

Figure 201320386849

A compact circulating fluidized bed boiler capable of cleanly burning high-sodium coal, comprising a furnace, the furnace is divided into a lower furnace dense-phase zone and an upper furnace dilute-phase zone, the furnace dilute-phase zone is connected through a separator inlet flue The flue gas outlet of the cyclone separator arranged in front of the boiler furnace, the dust outlet of the cyclone separator is connected to the feeder through the standpipe, and the feeder is connected to the dense-phase area of the furnace through the feeder pipe, and the high-temperature flue gas generated by the combustion of the furnace passes through the The furnace panel heating surface in the dilute phase zone of the furnace cools rapidly, and the molten fly ash is effectively condensed, thereby effectively reducing the ash deposition on the tail convection heating surface; at the same time, the layout of the furnace panel heating surface The ash device can effectively clean up the accumulated ash and greatly improve the boiler operation cycle. The utility model has the characteristics of compact structure, convenient modular design and enlargement, and rationally utilizes the steel frame structure of the boiler. It is suitable for large-scale Take advantage of technology.

Figure 201320386849

Description

一种可清洁燃烧高钠煤的紧凑型循环流化床锅炉A compact circulating fluidized bed boiler that burns high-sodium coal cleanly

技术领域 technical field

本实用新型属于清洁煤燃烧利用技术领域,特别涉及一种可清洁燃烧高钠煤的紧凑型循环流化床锅炉。  The utility model belongs to the technical field of clean coal combustion utilization, in particular to a compact circulating fluidized bed boiler which can cleanly burn high-sodium coal. the

背景技术 Background technique

我国是煤炭资源丰富的国家,探明储量10997亿吨,预测煤炭总资源量超过5万亿吨,但我国大多数的煤炭资源位于西部地区,这些地区降水少,属于干旱、半干旱和沙漠化地区,生态环境脆弱、经济欠发达。如果单纯将煤炭资源外运,运输量大、距离远,这是西部煤炭资源大规模利用的主要瓶颈,而在西部地区采用煤炭资源燃烧发电并外送则是解决目前利用瓶颈问题的最好办法。  my country is a country rich in coal resources, with a proven reserve of 1,099.7 billion tons and a predicted total coal resource of more than 5 trillion tons. However, most of my country's coal resources are located in the western regions, where precipitation is low, and they belong to arid, semi-arid and desertified regions , the ecological environment is fragile, and the economy is underdeveloped. If coal resources are simply transported abroad, the transportation volume is large and the distance is long, which is the main bottleneck for the large-scale utilization of coal resources in the west, and the use of coal resources in the west for power generation and delivery is the best way to solve the current utilization bottleneck problem . the

新疆在西部地区中煤炭储量最为丰富,新疆煤的水分和挥发分含量较高,灰分、热值较低,煤灰中的钠和钾含量较高,灰熔点较低,在燃烧过程中其煤灰沾污性极强,属于强积灰结渣型灰,属于高钠煤范畴。在燃用高钠煤的过程中发现,相当数量的锅炉炉膛内、过热器和再热器区域在短期内会形成了大片粘结性很强的积灰,并伴有严重的高温腐蚀,最终导致锅炉大面积爆管,直接影响了锅炉运行的可靠性、安全性和经济性。  Xinjiang has the most abundant coal reserves in the western region. Xinjiang coal has high moisture and volatile content, low ash and calorific value, high sodium and potassium content in coal ash, and low ash melting point. During the combustion process, its coal The ash is highly contaminating and belongs to the strong ash-depositing and slagging type ash, which belongs to the category of high-sodium coal. In the process of burning high-sodium coal, it was found that a considerable number of boiler furnaces, superheaters and reheater areas would form a large area of highly cohesive ash in a short period of time, accompanied by severe high-temperature corrosion, and eventually This caused a large area of the boiler to explode, which directly affected the reliability, safety and economy of the boiler operation. the

现有技术手段中,一般通过增加炉膛截面积、优化燃烧及配风、增加吹灰频次、使用添加剂、配煤掺烧等手段加以延缓,但始终难以根治。国内外燃用高钠煤的均属一大难题,因此高钠煤仅在美国、澳大利亚和我国少数电厂进行掺烧利用。掺烧过程中,煤粉锅炉容易在炉内燃烧器区域结渣和高温过热器、高温再热器出现沾污堵塞问题,循环流化床锅炉容易在床面出现结焦和尾部烟道受热面沾污堵塞问题。虽然整体而言燃用高钠煤的循环流化床锅炉的运行周期要长于煤粉锅炉,且循环流化床锅炉的掺烧比例要高于煤粉 锅炉(一般为40%~50%),但由于所掺烧煤种价格较高,机组运行的经济性受到了显著地影响。  In the existing technical means, it is generally delayed by increasing the cross-sectional area of the furnace, optimizing combustion and air distribution, increasing the frequency of soot blowing, using additives, blending coal and blending combustion, etc., but it is still difficult to cure it. The burning of high-sodium coal at home and abroad is a big problem, so high-sodium coal is only used in a few power plants in the United States, Australia and my country. During the process of co-firing, pulverized coal boilers are prone to slagging in the burner area of the furnace and contamination and clogging of high-temperature superheaters and high-temperature reheaters; circulating fluidized bed boilers are prone to coking on the bed surface and staining Dirt clogging problem. Although overall the operating cycle of circulating fluidized bed boilers burning high-sodium coal is longer than that of pulverized coal boilers, and the blending ratio of circulating fluidized bed boilers is higher than that of pulverized coal boilers (generally 40% to 50%), However, due to the high price of the blended coal, the economy of unit operation has been significantly affected. the

因此,要想实现我国煤炭资源的大规模利用,迫切需要寻求一种直接燃烧高钠煤的方法。  Therefore, in order to realize the large-scale utilization of coal resources in my country, it is urgent to find a method to directly burn high-sodium coal. the

发明内容 Contents of the invention

为了克服上述现有技术的缺点,本实用新型的目的在于提供一种可清洁燃烧高钠煤的紧凑型循环流化床锅炉,能够清洁高效地燃用高钠煤,避免积灰和结渣。  In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a compact circulating fluidized bed boiler that can cleanly burn high-sodium coal, which can cleanly and efficiently burn high-sodium coal and avoid ash accumulation and slagging. the

为了实现上述目的,本实用新型采用的技术方案是:  In order to achieve the above object, the technical solution adopted by the utility model is:

一种可清洁燃烧高钠煤的紧凑型循环流化床锅炉,包括炉膛,所述炉膛分为下部的炉膛密相区1和上部的炉膛稀相区2,炉膛稀相区2通过分离器入口烟道3接布置在锅炉炉前的旋风分离器4的烟气出口,旋风分离器4的排尘口通过立管5连接返料器6,返料器6通过回料管7接炉膛密相区1。  A compact circulating fluidized bed boiler that can cleanly burn high-sodium coal, including a furnace, the furnace is divided into a lower furnace dense-phase zone 1 and an upper furnace dilute-phase zone 2, and the furnace dilute-phase zone 2 passes through the separator inlet The flue 3 is connected to the flue gas outlet of the cyclone separator 4 arranged in front of the boiler furnace, and the dust outlet of the cyclone separator 4 is connected to the feeder 6 through the standpipe 5, and the feeder 6 is connected to the dense phase of the furnace through the feeder pipe 7 District 1. the

所述炉膛稀相区2内设有多片布置的炉内屏式受热面A。  In the dilute-phase zone 2 of the furnace, there are multiple screen-type heating surfaces A arranged in the furnace. the

所述炉内屏式受热面A布置在前后墙或左右侧墙,屏之间的间距在200~1000mm之间。  The screen-type heating surface A in the furnace is arranged on the front and rear walls or the left and right side walls, and the distance between the screens is between 200 and 1000 mm. the

所述旋风分离器4除尘后的洁净烟气由分离器中心筒8进入连接冷却烟道9,连接冷却烟道9接纵向的尾部烟道10,尾部烟道10底部设置有尾部烟道出口13和带灰斗排灰口12的灰斗11。  The clean flue gas after dust removal by the cyclone separator 4 enters the connecting cooling flue 9 from the central cylinder 8 of the separator, and the connecting cooling flue 9 is connected to the longitudinal tail flue 10, and the bottom of the tail flue 10 is provided with a tail flue outlet 13 And the ash hopper 11 of band ash hopper ash outlet 12. the

所述连接冷却烟道9内设置有多级屏式烟气冷却受热面C,所述多级屏式烟气冷却受热面C为对流式受热面,各级之间串连布置。  The connecting cooling flue 9 is provided with a multi-stage panel flue gas cooling and heating surface C, and the multi-stage panel flue gas cooling and heating surface C is a convection heating surface, and the stages are arranged in series. the

所述尾部烟道10内布置有尾部烟道受热面B。  A rear flue heating surface B is arranged in the tail flue 10 . the

所述分离器入口烟道3、连接冷却烟道9和尾部烟道10中均设置有吹灰器16,吹灰器16沿烟气流动方向布置在不同受热面之间或相同受热面的不同区域之间,吹灰介质为蒸汽、空气、燃气或水,同时吹灰器16周边设置清灰孔,以供人力或机械进行补充清灰。  The inlet flue 3 of the separator, the connecting cooling flue 9 and the tail flue 10 are all provided with soot blowers 16, and the soot blowers 16 are arranged between different heating surfaces or in different areas of the same heating surface along the flue gas flow direction Between, the soot-blowing medium is steam, air, gas or water, and soot-cleaning holes are set around the sootblower 16 for supplementary soot-cleaning by manpower or machinery. the

所述返料器6设置有循环灰排放口15,用于定期或连续排放返料器6内的循环灰。  The feeder 6 is provided with a circulating ash discharge port 15 for periodically or continuously discharging the recycled ash in the feeder 6 . the

所述回料管7连接物料添加管14,燃烧所需的煤、脱硫剂和补充床料可通过物料添加管14与回料管7内的循环灰混合后送入炉膛密相区1或单独送入炉膛密相区1。灰渣一部分由烟气携带走,一部分由炉膛密相区1设置的排渣口17和返料器6设置的循环灰排放系统15定期或连续排出。凝结固化在飞灰、底渣和床料中气态碱金属及其化合物也可通过排渣口17和循环灰排放系统15进行置换和富集排出。  The return pipe 7 is connected to the material addition pipe 14, and the coal, desulfurizer and supplementary bed material required for combustion can be mixed with the circulating ash in the return pipe 7 through the material addition pipe 14 and sent to the furnace dense phase zone 1 or separately It is sent to the dense-phase zone 1 of the furnace. Part of the ash is carried away by the flue gas, and part of it is regularly or continuously discharged from the slag outlet 17 provided in the furnace dense phase zone 1 and the circulating ash discharge system 15 provided in the feeder 6 . The condensed and solidified gaseous alkali metals and their compounds in the fly ash, bottom slag and bed material can also be replaced and enriched and discharged through the slag outlet 17 and the circulating ash discharge system 15 . the

本实用新型使用的脱硫剂包括石灰石、消石灰、电石渣或可以充当脱硫剂的物质。使用的补充床料包括沙子、炉渣、循环灰等可以充当床料的惰性补充物质,这些物质可以定期或连续补充。  The desulfurizing agent used in the utility model includes limestone, slaked lime, carbide slag or substances that can act as desulfurizing agents. The supplementary bed materials used include sand, slag, recycled ash and other inert supplementary substances that can be used as bed materials, and these substances can be supplemented periodically or continuously. the

在分离器入口烟道3中设置有用于定期或连续添加脱硝剂的脱硝还原剂喷入口18,为了降低NOX排放浓度,通过脱硝还原剂喷入口可以定期或连续喷入脱硝剂的物质。脱硝剂包括尿素水溶液、氨水、液氨或可以充当脱硝剂的物质。  A denitrification reducing agent injection port 18 for regular or continuous addition of denitrification agent is provided in the inlet flue 3 of the separator. In order to reduce the NOx emission concentration, the substance of the denitrification agent can be regularly or continuously injected through the denitrification reducing agent injection port. Denitration agents include urea aqueous solution, ammonia water, liquid ammonia or substances that can act as denitration agents. the

所述炉膛密相区1和炉膛稀相区2气流流动速度为3~5m/s,同时温度控制在600~850℃之间。  The gas flow velocity in the dense-phase zone 1 and the dilute-phase zone 2 of the furnace is 3-5m/s, and the temperature is controlled between 600-850°C. the

与现有技术相比,本实用新型的有益效果是:  Compared with the prior art, the beneficial effects of the utility model are:

1.由于将旋风分离器前置,结构紧凑,高效利用了钢架结构,节约了锅炉占地,即使增加炉膛容积的也不会造成锅炉总体体积的增加。  1. Because the cyclone separator is placed in front, the structure is compact, the steel frame structure is used efficiently, and the boiler occupies less space. Even if the furnace volume is increased, the overall volume of the boiler will not increase. the

2.分离器前置,延长了连接冷却烟道的长度,便于布置多级屏式烟气冷却受热面,充分冷却烟气。  2. The separator is placed in front, extending the length of the connecting cooling flue, which is convenient for arranging multi-stage screen flue gas cooling heating surfaces and fully cooling the flue gas. the

3.发挥了循环流化床锅炉的燃烧温度低的优势,降低了碱金属及其化合物的释放量。  3. Taking advantage of the low combustion temperature of the circulating fluidized bed boiler, the release of alkali metals and their compounds is reduced. the

4.高密度吹灰器使得积灰易于清理,避免了沉积。  4. High-density soot blower makes dust accumulation easy to clean and avoids deposition. the

附图说明 Description of drawings

图1为本实用新型的整体结构示意图。  Figure 1 is a schematic diagram of the overall structure of the utility model. the

图2为图1的俯视图。  FIG. 2 is a top view of FIG. 1 . the

图3为本实用新型一种连接冷却烟道布置在炉膛侧面应用实例的结构示意图。  Fig. 3 is a structural schematic diagram of an application example of connecting the cooling flue arranged on the side of the furnace of the utility model. the

图4为图3的俯视图。  FIG. 4 is a top view of FIG. 3 . the

具体实施方式 Detailed ways

以下结合附图对本实用新型作进一步说明。但本领域技术人员了解,本实用新型的保护范围并不限于下述实施例的内容,任何在本实用新型基础上做出的改进和变化,都在本实用新型的保护范围之内。  Below in conjunction with accompanying drawing, the utility model is further described. However, those skilled in the art understand that the protection scope of the present invention is not limited to the content of the following embodiments, and any improvements and changes made on the basis of the present invention are within the protection scope of the present invention. the

实施例1:  Example 1:

参见图1和图2,该锅炉包括炉膛密相区1和炉膛稀相区2,炉膛稀相区2内设有8片炉内屏式受热面A(左右侧墙各4片)。炉膛稀相区2与旋风分离器4通过分离器入口烟道3相连接,旋风分离器4共2台,紧凑布置在锅炉前侧。经旋风分离器4除尘后的烟气由分离器中心筒8进入连接冷却烟道9连接冷却烟道9内设置了两级烟气冷却受热面C为对流式受热面,通过该受热面可以降低烟气温度,连接冷却烟道9布置在锅炉炉膛的上部。尾部烟道10内布置有尾部烟道受热面B,冷却后的烟气最终由尾部烟道出口13排出。  Referring to Fig. 1 and Fig. 2, the boiler includes a furnace dense-phase zone 1 and a furnace dilute-phase zone 2. In the furnace dilute-phase zone 2, there are 8 screen-type heating surfaces A in the furnace (4 panels on the left and right side walls). The furnace dilute phase zone 2 is connected with the cyclone separator 4 through the separator inlet flue 3, and there are 2 cyclone separators 4, which are compactly arranged on the front side of the boiler. The flue gas after dedusting by the cyclone separator 4 enters the connecting cooling flue 9 from the separator central cylinder 8. The connecting cooling flue 9 is equipped with a two-stage flue gas cooling heating surface C is a convective heating surface, through which the heating surface can be reduced The flue gas temperature is connected to the cooling flue 9 which is arranged on the upper part of the boiler furnace. A tail flue heating surface B is arranged in the tail flue 10 , and the cooled flue gas is finally discharged from the tail flue outlet 13 . the

炉膛密相区1和炉膛稀相区2的温度控制在600~850℃之间,气流流动速度为4.2m/s。灰渣的细颗粒由烟气携带走,一部分由炉膛密相区1设置的排渣口17和返料器6设置的循环灰排放口15定期排出。由于燃烧温度低,凝结固化在飞灰、底渣和床料中气态碱金属及其化合物也可通过排渣口17和循环灰排放口15进行置换和富集排出。  The temperature of the dense-phase zone 1 and the dilute-phase zone 2 of the furnace is controlled between 600 and 850°C, and the airflow velocity is 4.2m/s. The fine particles of ash and slag are carried away by the flue gas, and some of them are regularly discharged from the slag discharge port 17 provided in the furnace dense phase zone 1 and the circulating ash discharge port 15 provided in the feeder 6 . Due to the low combustion temperature, gaseous alkali metals and their compounds condensed and solidified in the fly ash, bottom slag and bed material can also be replaced and enriched and discharged through the slag discharge port 17 and the circulating ash discharge port 15 . the

由于碱金属及其氧化物会在受热面形成一层附着物,进而粘结在受热面上,随着运行时间的延长,逐步加厚,直至堵塞。为此,在分离器入口烟道3、连接冷却烟道9、尾部烟道10内设置了高密度吹灰器16,沿烟气流动方 向进行强化吹灰,吹灰介质选用蒸汽和燃气,吹灰器布置密度为每米1台。此外,在高密度吹灰器16周边还设置有清灰孔,特殊情况下可以由人力进行补充清灰。尾部烟道10下部设置的灰斗11和灰斗排灰口12,可定期排放尾部烟道内的积灰。  Because the alkali metal and its oxide will form a layer of attachment on the heating surface, and then bonded to the heating surface, as the running time prolongs, it will gradually thicken until it is blocked. For this reason, a high-density soot blower 16 is installed in the inlet flue 3 of the separator, the connecting cooling flue 9, and the tail flue 10 to carry out enhanced soot blowing along the flow direction of the flue gas. The soot blowing medium is selected from steam and gas. The arrangement density of soot blowers is 1 set per meter. In addition, there are soot cleaning holes around the high-density sootblower 16, and in special cases, supplementary soot cleaning can be performed by manpower. The ash hopper 11 and the ash hopper ash outlet 12 provided at the bottom of the tail flue 10 can regularly discharge the accumulated ash in the tail flue. the

为了降低NOX排放浓度,锅炉还设置有脱硝还原剂喷入口18,运行期间连续喷入尿素水溶液充当脱硝剂,进行烟气脱硝。  In order to reduce the concentration of NOX emissions, the boiler is also equipped with a denitrification reducing agent injection port 18, and continuously sprays urea aqueous solution as a denitrification agent during operation to perform flue gas denitrification. the

实施例2:  Example 2:

参见图3和图4,一种用于蒸汽供应的小型锅炉,主要燃烧高钠煤。炉膛稀相区2内设有4片布置的屏式受热面A(前后侧墙各2片),2台旋风分离器4布置在炉前。2个连接冷却烟道9份布置在炉膛左侧和右侧,锅炉总高度较低,每个内连接冷却烟道9设置三级烟气冷却受热面C。  See Figure 3 and Figure 4, a small boiler for steam supply, mainly burning high-sodium coal. In the dilute-phase zone 2 of the furnace, there are 4 screen-type heating surfaces A (2 panels on the front and rear side walls), and 2 cyclone separators 4 are arranged in front of the furnace. The two connecting cooling flues 9 are arranged on the left and right sides of the furnace, the overall height of the boiler is relatively low, and each inner connecting cooling flue 9 is provided with a three-stage flue gas cooling heating surface C. the

Claims (9)

  1. One kind can the high sodium coal of clean burning compact circulating fluidized bed boiler, comprise burner hearth, it is characterized in that, described burner hearth is divided into the burner hearth emulsion zone (1) of bottom and the burner hearth dilute-phase zone (2) on top, burner hearth dilute-phase zone (2) connects the exhanst gas outlet of the cyclone separator (4) being arranged in before Boiler Furnace by separator inlet flue (3), the dust-exhausting port of cyclone separator (4) connects material returning device (6) by standpipe (5), and material returning device (6) connects burner hearth emulsion zone (1) by feed back pipe (7).
  2. 2. compact circulating fluidized bed boiler that can the high sodium coal of clean burning according to claim 1, is characterized in that, is provided with the stove inner screen type heating surface (A) that multi-disc is arranged in described burner hearth dilute-phase zone (2).
  3. 3. compact circulating fluidized bed boiler that can the high sodium coal of clean burning according to claim 2, is characterized in that, described stove inner screen type heating surface (A) is arranged in front-back wall or left and right side wall, and the spacing between screen is between 200~1000mm.
  4. 4. compact circulating fluidized bed boiler that can the high sodium coal of clean burning according to claim 1, it is characterized in that, clean flue gas after described cyclone separator (4) dedusting is entered and is connected cooling stack (9) by central cylinder of separator (8), connect cooling stack (9) and connect back-end ductwork (10) longitudinally, back-end ductwork (10) bottom is provided with the ash bucket (11) of back-end ductwork outlet (13) and band ash bucket ash discharging hole (12).
  5. 5. compact circulating fluidized bed boiler that can the high sodium coal of clean burning according to claim 4, it is characterized in that, in described connection cooling stack (9), be provided with the cooling heating surface of multistage screen formula flue gas (C), the cooling heating surface of described multistage screen formula flue gas (C) is convection type heating surface, at different levels between series winding arrange.
  6. 6. compact circulating fluidized bed boiler that can the high sodium coal of clean burning according to claim 4, is characterized in that, is furnished with back-end ductwork heating surface (B) in described back-end ductwork (10).
  7. 7. compact circulating fluidized bed boiler that can the high sodium coal of clean burning according to claim 4, it is characterized in that, in described separator inlet flue (3), connection cooling stack (9) and back-end ductwork (10), be provided with soot blower (16), soot blower (16) is arranged between different heating surfaces or between the zones of different of identical heating surface along flow of flue gas direction, sootblowing dielectric is steam, air, combustion gas or water, soot blower (16) periphery arranges ash removing opening simultaneously, for manpower or machinery, supplements deashing.
  8. 8. compact circulating fluidized bed boiler that can the high sodium coal of clean burning according to claim 1, is characterized in that, described material returning device (6) is provided with circulating ash floss hole (15), for the circulating ash in regular or continuous blow-down material returning device (6).
  9. 9. compact circulating fluidized bed boiler that can the high sodium coal of clean burning according to claim 1, is characterized in that, described feed back pipe (7) connects material adding tube (14).
CN201320386849.8U 2013-07-01 2013-07-01 Compact type circulating fluidized bed boiler capable of cleanly combusting high-sodium coal Expired - Lifetime CN203478218U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103423738A (en) * 2013-07-01 2013-12-04 中国华能集团清洁能源技术研究院有限公司 Compact type circulating fluidized bed boiler for burning high sodium coal
WO2021212783A1 (en) * 2020-04-23 2021-10-28 西安热工研究院有限公司 Pulverized coal boiler capable of preventing contamination and slagging of convection heating surface

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103423738A (en) * 2013-07-01 2013-12-04 中国华能集团清洁能源技术研究院有限公司 Compact type circulating fluidized bed boiler for burning high sodium coal
CN103423738B (en) * 2013-07-01 2016-05-04 中国华能集团清洁能源技术研究院有限公司 A kind of compact circulating fluidized bed boiler that uses high sodium coal
WO2021212783A1 (en) * 2020-04-23 2021-10-28 西安热工研究院有限公司 Pulverized coal boiler capable of preventing contamination and slagging of convection heating surface

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