WO2024032029A1 - System and method for improving deep peak regulation capability of pulverized coal-fired boiler - Google Patents
System and method for improving deep peak regulation capability of pulverized coal-fired boiler Download PDFInfo
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- WO2024032029A1 WO2024032029A1 PCT/CN2023/090024 CN2023090024W WO2024032029A1 WO 2024032029 A1 WO2024032029 A1 WO 2024032029A1 CN 2023090024 W CN2023090024 W CN 2023090024W WO 2024032029 A1 WO2024032029 A1 WO 2024032029A1
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- powder
- primary air
- pulverized coal
- coal
- air
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 87
- 239000003245 coal Substances 0.000 claims abstract description 75
- 239000002028 Biomass Substances 0.000 claims abstract description 45
- 239000000203 mixture Substances 0.000 claims abstract description 19
- 238000002485 combustion reaction Methods 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims description 10
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000000446 fuel Substances 0.000 claims 2
- 239000002585 base Substances 0.000 claims 1
- 239000012458 free base Substances 0.000 claims 1
- 230000009466 transformation Effects 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract 1
- 239000002802 bituminous coal Substances 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Classifications
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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
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
Definitions
- This application relates to the technical field of deep peak shaving of pulverized coal boilers, specifically to a system and method for improving the deep peak shaving capabilities of pulverized coal boilers, which is suitable for inferior bituminous coal boilers.
- thermal power flexibility transformation is expected to enable the minimum technical output of thermal power units to reach 40-50% of the rated capacity, the minimum technical output of pure condensing units to reach 30-35% of the rated capacity, and the minimum technical output of pure condensing units of some units with good coal quality and equipment to reach 40-50% of the rated capacity. 20-25% rated capacity.
- the purpose of this application is to provide a system and method for improving the deep peak-shaving capability of pulverized coal boilers, which is suitable for inferior bituminous coal boilers.
- a system to improve the deep peak-shaving capability of pulverized coal boilers including powder bin, primary air main pipe, air volume adjustment device, powder feeder, air powder distributor, raw coal bunker, primary fan, coal mill, primary air powder pipe, Burner and furnace.
- the air volume adjustment device is installed on the powder supply air bypass pipe leading from the primary air main pipe, and is connected to the powder feeder downstream.
- the inlet of the powder feeder is connected to the powder bin, and the outlet of the powder feeder is connected to the air powder distributor.
- the air powder distributor has Multiple outlet branches are connected to each primary air powder duct in a one-to-one correspondence; the primary fan, coal mill, primary air powder duct, burner, and furnace are connected in sequence; the upstream of the primary air powder duct is the air powder distributor and The outlet of the coal mill.
- the primary air main pipe is the cold primary air main pipe and the hot primary air main pipe of the boiler.
- the working method of a method to improve the deep peak-shaving capability of pulverized coal boilers is: the air volume from the primary air main pipe carries a certain amount of biomass fine powder into the air powder distributor, where the biomass fine powder comes from the powder bin (biomass is required It is a fine powder with R 90 ⁇ 10%.
- the coal quality requirements of biomass based on mass percentage are total moisture M t ⁇ 10%, received base ash A ar ⁇ 10%, V daf ⁇ 70%, and K 2 in the ash component O ⁇ 10%), in which the amount of biomass powder is controlled by the powder feeder, and the air volume carrying the biomass fine powder is regulated by the air volume regulating device.
- the qualified concentration of air/biomass fine powder mixture (the air-to-powder ratio is required to be 1.4 -1.8, the temperature of the air/biomass fine powder mixture is 40-60°C) and then distributed equally through the pulverized coal distributor and then enters the primary air pulverized pipe and the raw coal bunker
- the raw coal and the primary air from the primary air blower enter the coal mill at the same time.
- the mixture of primary air/raw coal powder and the mixture of air/biomass fine powder enter the primary air powder at the same time.
- the ash composition of raw coal pulverized coal and biomass mixture SiO 2 ⁇ 40%, Al 2 O 3 ⁇ 20%, Fe 2 O 3 ⁇ 10%, CaO ⁇ 20%, MgO ⁇ 5%, Fe 2 O 3 +CaO + MgO ⁇ 20%, Na 2 O ⁇ 3.0%, K 2 O ⁇ 3%, Na 2 O + K 2 O ⁇ 5.0%), then enters the burner to ignite, and enters the furnace to complete combustion.
- This application can improve the deep peak-shaving capability of pulverized coal boilers, especially high-ash low-quality bituminous coal, while also achieving the effect of CO2 emission reduction.
- the system is simple, the equipment modification is small, and the impact on the original boiler system is small. It only needs to add a powder feeding system for biomass fine powder.
- the primary air main pipe is selected as the air source to ensure the pressure head requirement of the system.
- the biomass mixing ratio can be adjusted in real time according to the low-load combustion stability of the boiler and the slagging condition of the furnace, making the system flexible in operation.
- Figure 1 is a schematic structural diagram of a system for improving the deep peak-shaving capability of a pulverized coal boiler according to the present application.
- 1 is the powder bin
- 2 is the primary air main pipe
- 3 is the air volume adjustment device
- 4 is the powder feeder
- 5 is the air powder distribution 6 is the raw coal bunker
- 7 is the primary fan
- 8 is the coal mill
- 9 is the primary air powder pipe
- 10 is the burner
- 11 is the furnace.
- the working flow of a method for improving the deep peak-shaving capability of a pulverized coal boiler is:
- a system and method for improving the deep peak-shaving capability of a pulverized coal boiler and the working method are: the air volume from the primary air main pipe 2 carries a certain A certain amount of biomass fine powder enters the air powder distributor 5, in which the biomass fine powder comes from the powder bin 1 (the biomass is required to be fine powder with R 90 ⁇ 10%, and the coal quality requirement of the biomass in terms of mass percentage is full moisture M t ⁇ 10%, received base ash A ar ⁇ 10%, V daf ⁇ 70%, K 2 O in the ash component ⁇ 10%), in which the amount of biomass powder is controlled by the powder feeder 4, and the amount of biomass fine powder carried
- the air volume is regulated by the air volume regulating device 3.
- the mixture of wind/biomass fine powder with qualified concentration (required air-to-powder ratio is 1.4-1.8) is evenly distributed through the pulverized coal distributor 5 and then enters the primary air-powder pipe 9.
- Raw coal The raw coal in the bin 6 and the primary air in the primary fan 7 enter the coal grinder 8 at the same time.
- the mixture of primary air/raw coal pulverized coal and the mixture of air/biomass fine powder are simultaneously Enter the primary air powder pipe 9 to form a mixture of primary air/raw coal powder/biomass fine powder (requirement 1: the mass ratio of biomass fine powder is 30%-50%, that is, the coal blending ratio is 70% -50%;
- Requirement 2 In terms of mass percentage, the ash composition of the mixture of raw coal pulverized coal and biomass: SiO 2 ⁇ 40%, Al 2 O 3 ⁇ 20%, Fe 2 O 3 ⁇ 10%, CaO ⁇ 20%, MgO ⁇ 5%, Fe 2 O 3 +CaO + MgO ⁇ 20%, Na 2 O ⁇ 3.0%, K 2 O ⁇ 3%, Na 2 O + K 2 O ⁇ 5.0%), then enters the burner 10 to ignite, and enters the furnace 11 to complete combustion.
- the system and method for improving the deep peak-shaving capability of a pulverized coal boiler described in this application can improve the deep peak-shaving capability of a pulverized coal boiler and is suitable for boilers with high ash content and low-quality bituminous coal.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present application relates to the technical field of deep peak regulation of pulverized coal-fired boilers, and in particular, to a system and method for improving the deep peak regulation capability of a pulverized coal-fired boiler, which are suitable for inferior bituminous coal-fired boilers. High-pressure primary air uniformly feeds biomass fine powder having qualified coal quality into a primary air powder pipeline by means of a pulverized coal distributor, the biomass fine powder is mixed with a primary air powder mixture from a powder preparation system in the primary air powder pipeline to form a mixture of primary air/pulverized coal/biomass fine powder, and then the mixture of primary air/pulverized coal/biomass fine powder enters a combustor for ignition and finally enters a hearth for combustion. The system of the present application is simple, has small equipment transformation, slightly affects the original boiler system, can control the lowest oil-free stable combustion load of a high-ash bituminous coal-fired boiler to be about 20% of the rated load, and achieves the objective of reducing CO2 emission.
Description
相关申请的交叉引用Cross-references to related applications
本申请要求在2022年08月10日提交中国专利局、申请号为202210957405.9、发明名称为“一种提高煤粉锅炉深度调峰能力的系统及方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application requires the priority of the Chinese patent application submitted to the China Patent Office on August 10, 2022, with the application number 202210957405.9 and the invention title "A system and method for improving the deep peak shaving capability of pulverized coal boilers", and its entire content incorporated herein by reference.
本申请涉及煤粉锅炉深度调峰技术领域，具体涉及一种提高煤粉锅炉深度调峰能力的系统及方法，适用于劣质烟煤锅炉。This application relates to the technical field of deep peak shaving of pulverized coal boilers, specifically to a system and method for improving the deep peak shaving capabilities of pulverized coal boilers, which is suitable for inferior bituminous coal boilers.
新能源电力消纳已成为当前和未来至少10年我国能源电力发展面临的重大现实问题，我国目前电力系统的调峰调频主要依赖于火电机组。火电灵活性改造预期将使热电机组最小技术出力达到40-50％额定容量，纯凝机组最小技术出力达到30-35％额定容量，部分煤质、设备好的机组纯凝工况最小技术出力达到20-25％额定容量。New energy power consumption has become a major practical issue facing my country's energy and power development now and for at least the next 10 years. my country's current power system peak and frequency regulation mainly relies on thermal power units. The thermal power flexibility transformation is expected to enable the minimum technical output of thermal power units to reach 40-50% of the rated capacity, the minimum technical output of pure condensing units to reach 30-35% of the rated capacity, and the minimum technical output of pure condensing units of some units with good coal quality and equipment to reach 40-50% of the rated capacity. 20-25% rated capacity.
众所周知，为了提高煤粉锅炉的深度调峰能力，电厂需要专门准备挥发分较高、发热量较高、燃烧性能优良的烟煤。但部分电厂由于煤源问题，很难采购到此类优质煤种，加之优质烟煤的价格高，也增加了电厂的经济负担。生物质能是一种储量巨大、分布广泛、优质清洁(CO2零排放)的可再生能源，妥善利用生物质能将对CO2减排产生巨大作用，其中生物质燃烧发电技术是环境友好、高效经济的规模化利用技术，越来越受到国内外能源领域的广泛重视。目
前有很多的生物质掺烧方案，但并没有明确掺烧的细节，尤其是掺烧生物质提高煤粉锅炉深度调峰能力方面。As we all know, in order to improve the deep peak-shaving capability of pulverized coal boilers, power plants need to specially prepare bituminous coal with higher volatile content, higher calorific value and excellent combustion performance. However, due to coal source issues, it is difficult for some power plants to purchase such high-quality coal. In addition, the price of high-quality bituminous coal is high, which also increases the economic burden of power plants. Biomass energy is a renewable energy source with huge reserves, wide distribution, high quality and clean (zero CO2 emissions). Proper use of biomass energy will play a huge role in reducing CO2 emissions. Among them, biomass combustion power generation technology is environmentally friendly and Efficient and economical large-scale utilization technology has attracted more and more attention in the energy field at home and abroad. Head There are many biomass blending schemes at present, but the details of blending are not clear, especially the blending of biomass to improve the deep peak shaving capability of pulverized coal boilers.
发明内容Contents of the invention
为了克服上述现有技术存在的缺点，本申请的目的在于提供一种提高煤粉锅炉深度调峰能力的系统及方法，适用于劣质烟煤锅炉。In order to overcome the shortcomings of the above-mentioned existing technologies, the purpose of this application is to provide a system and method for improving the deep peak-shaving capability of pulverized coal boilers, which is suitable for inferior bituminous coal boilers.
为达到上述目的，本申请采用如下技术方案：In order to achieve the above purpose, this application adopts the following technical solutions:
一种提高煤粉锅炉深度调峰能力的系统，包括粉仓、一次风母管、风量调节装置、给粉机、风粉分配器、原煤仓、一次风机、磨煤机、一次风粉管道、燃烧器和炉膛。A system to improve the deep peak-shaving capability of pulverized coal boilers, including powder bin, primary air main pipe, air volume adjustment device, powder feeder, air powder distributor, raw coal bunker, primary fan, coal mill, primary air powder pipe, Burner and furnace.
风量调节装置设置在一次风母管引出的给粉风旁路管道上，下游连接给粉机，给粉机的入口连接粉仓，给粉机的出口连接风粉分配器，风粉分配器具有多个出口支路，与各一次风粉管道一一对应连接；一次风机、磨煤机、一次风粉管道、燃烧器、炉膛为依次连接；其中一次风粉管道的上游是风粉分配器和磨煤机的出口。The air volume adjustment device is installed on the powder supply air bypass pipe leading from the primary air main pipe, and is connected to the powder feeder downstream. The inlet of the powder feeder is connected to the powder bin, and the outlet of the powder feeder is connected to the air powder distributor. The air powder distributor has Multiple outlet branches are connected to each primary air powder duct in a one-to-one correspondence; the primary fan, coal mill, primary air powder duct, burner, and furnace are connected in sequence; the upstream of the primary air powder duct is the air powder distributor and The outlet of the coal mill.
所述一次风母管为锅炉的冷一次风母管和热一次风母管。The primary air main pipe is the cold primary air main pipe and the hot primary air main pipe of the boiler.
一种提高煤粉锅炉深度调峰能力的方法的工作方法是：来自一次风母管的风量携带一定量的生物质细粉进入风粉分配器，其中生物质细粉来自粉仓(要求生物质是R90<10％的细粉，按质量百分比生物质的煤质要求是全水分Mt≤10％、收到基灰分Aar≤10％，Vdaf≥70％，灰成分中的K2O≤10％)，其中生物质粉量由给粉机控制，携带生物质细粉的风量由风量调节装置进行调控，同时合格浓度的风/生物质细粉的混合物(要求风粉比在1.4-1.8，风/生物质细粉的混合物的温度在40-60℃)然后通过煤粉分配器进行均等分配后进入一次风粉管道，原煤仓
中的原煤和一次风机中的一次风同时进入磨煤机，将原煤磨制成合格细度的煤粉后，一次风/原煤煤粉的混合物和风/生物质细粉的混合物同时进入一次风粉管道，形成一次风/原煤煤粉/生物质细粉的混合物(要求1：生物质细粉的质量比在30％-50％，也即燃煤的掺烧比例在70％-50％；要求2：按质量百分比，原煤煤粉和生物质混合物的煤灰成分：SiO2≥40％、Al2O3≥20％、Fe2O3≤10％、CaO≤20％、MgO≤5％、Fe2O3+CaO+MgO≤20％、Na2O≤3.0％、K2O≤3％、Na2O+K2O≤5.0％)，然后进入燃烧器着火，并进入炉膛完成燃烧。The working method of a method to improve the deep peak-shaving capability of pulverized coal boilers is: the air volume from the primary air main pipe carries a certain amount of biomass fine powder into the air powder distributor, where the biomass fine powder comes from the powder bin (biomass is required It is a fine powder with R 90 <10%. The coal quality requirements of biomass based on mass percentage are total moisture M t ≤ 10%, received base ash A ar ≤ 10%, V daf ≥ 70%, and K 2 in the ash component O≤10%), in which the amount of biomass powder is controlled by the powder feeder, and the air volume carrying the biomass fine powder is regulated by the air volume regulating device. At the same time, the qualified concentration of air/biomass fine powder mixture (the air-to-powder ratio is required to be 1.4 -1.8, the temperature of the air/biomass fine powder mixture is 40-60°C) and then distributed equally through the pulverized coal distributor and then enters the primary air pulverized pipe and the raw coal bunker The raw coal and the primary air from the primary air blower enter the coal mill at the same time. After the raw coal is ground into coal powder with acceptable fineness, the mixture of primary air/raw coal powder and the mixture of air/biomass fine powder enter the primary air powder at the same time. pipeline to form a mixture of primary air/raw coal pulverized coal/biomass fine powder (requirement 1: the mass ratio of biomass fine powder is 30%-50%, that is, the coal blending ratio is 70%-50%; Requirement 2: According to mass percentage, the ash composition of raw coal pulverized coal and biomass mixture: SiO 2 ≥40%, Al 2 O 3 ≥20%, Fe 2 O 3 ≤10%, CaO ≤ 20%, MgO ≤ 5%, Fe 2 O 3 +CaO + MgO ≤ 20%, Na 2 O ≤ 3.0%, K 2 O ≤ 3%, Na 2 O + K 2 O ≤ 5.0%), then enters the burner to ignite, and enters the furnace to complete combustion.
本申请至少具有如下有益的技术效果：This application has at least the following beneficial technical effects:
1)本申请可以提高煤粉锅炉尤其是高灰分劣质烟煤的深度调峰能力，同时还可达到CO2减排的效果。1) This application can improve the deep peak-shaving capability of pulverized coal boilers, especially high-ash low-quality bituminous coal, while also achieving the effect of CO2 emission reduction.
2)系统简单，设备改造小，对锅炉原系统影响小，只需要增加生物质细粉的给粉系统即可，选用一次风母管作为风源，可保证系统的压头需要。2) The system is simple, the equipment modification is small, and the impact on the original boiler system is small. It only needs to add a powder feeding system for biomass fine powder. The primary air main pipe is selected as the air source to ensure the pressure head requirement of the system.
3)从生物质的煤质特性、掺烧质量比例以及生物质和煤的混合物的煤质指标控制，保证了掺烧生物质能够提高煤粉锅炉的深度调峰能力，且锅炉不会出现结渣、沾污和腐蚀加重的问题。3) From the coal quality characteristics of biomass, the blending mass ratio and the coal quality index control of the mixture of biomass and coal, it is ensured that blending biomass can improve the deep peak shaving capability of pulverized coal boilers, and the boilers will not cause problems. slag, contamination and corrosion problems.
4)采用风粉分配器，可保证生物质细粉在各只煤粉管道的均匀分配。4) The use of air-powder distributor can ensure the even distribution of biomass fine powder in each pulverized coal pipeline.
5)可根据锅炉低负荷稳燃情况和炉膛结渣情况实时调整生物质的掺烧比例，系统运行灵活。5) The biomass mixing ratio can be adjusted in real time according to the low-load combustion stability of the boiler and the slagging condition of the furnace, making the system flexible in operation.
图1为本申请一种提高煤粉锅炉深度调峰能力的系统的结构示意图。Figure 1 is a schematic structural diagram of a system for improving the deep peak-shaving capability of a pulverized coal boiler according to the present application.
附图标记说明：
1为粉仓、2为一次风母管、3为风量调节装置、4为给粉机、5为风粉分配
器、6为原煤仓、7为一次风机、8为磨煤机、9为一次风粉管道、10为燃烧器、11为炉膛。Explanation of reference symbols:
1 is the powder bin, 2 is the primary air main pipe, 3 is the air volume adjustment device, 4 is the powder feeder, and 5 is the air powder distribution
6 is the raw coal bunker, 7 is the primary fan, 8 is the coal mill, 9 is the primary air powder pipe, 10 is the burner, and 11 is the furnace.
1为粉仓、2为一次风母管、3为风量调节装置、4为给粉机、5为风粉分配
器、6为原煤仓、7为一次风机、8为磨煤机、9为一次风粉管道、10为燃烧器、11为炉膛。Explanation of reference symbols:
1 is the powder bin, 2 is the primary air main pipe, 3 is the air volume adjustment device, 4 is the powder feeder, and 5 is the air powder distribution
6 is the raw coal bunker, 7 is the primary fan, 8 is the coal mill, 9 is the primary air powder pipe, 10 is the burner, and 11 is the furnace.
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that a thorough understanding of the disclosure will be provided, and the scope of the disclosure will be fully conveyed to those skilled in the art. It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.
参考图1，一种提高煤粉锅炉深度调峰能力的方法的工作流程是：一种提高煤粉锅炉深度调峰能力的系统及方法及工作方法是：来自一次风母管2的风量携带一定量的生物质细粉进入风粉分配器5，其中生物质细粉来自粉仓1(要求生物质是R90<10％的细粉，按质量百分比生物质的煤质要求是全水分Mt≤10％、收到基灰分Aar≤10％，Vdaf≥70％，灰成分中的K2O≤10％)，其中生物质粉量由给粉机4控制，携带生物质细粉的风量由风量调节装置3进行调控，同时合格浓度的风/生物质细粉的混合物(要求风粉比在1.4-1.8)然后通过煤粉分配器5进行均等分配后进入一次风粉管道9，原煤仓6中的原煤和一次风机7中的一次风同时进入磨煤机8，将原煤磨制成合格细度的煤粉后，一次风/原煤煤粉的混合物和风/生物质细粉的混合物同时进入一次风粉管道9，形成一次风/原煤煤粉/生物质细粉的混合物(要求1：生物质细粉的质量比在30％-50％，也即燃煤的掺烧比例在70％-50％；要求2：按质量百分比，原煤煤粉和生物质混合物的煤灰成分：SiO2≥40％、Al2O3≥20％、Fe2O3≤10％、CaO≤20％、MgO≤5％、
Fe2O3+CaO+MgO≤20％、Na2O≤3.0％、K2O≤3％、Na2O+K2O≤5.0％)，然后进入燃烧器10着火，并进入炉膛11完成燃烧。Referring to Figure 1, the working flow of a method for improving the deep peak-shaving capability of a pulverized coal boiler is: A system and method for improving the deep peak-shaving capability of a pulverized coal boiler and the working method are: the air volume from the primary air main pipe 2 carries a certain A certain amount of biomass fine powder enters the air powder distributor 5, in which the biomass fine powder comes from the powder bin 1 (the biomass is required to be fine powder with R 90 <10%, and the coal quality requirement of the biomass in terms of mass percentage is full moisture M t ≤10%, received base ash A ar ≤10%, V daf ≥70%, K 2 O in the ash component ≤10%), in which the amount of biomass powder is controlled by the powder feeder 4, and the amount of biomass fine powder carried The air volume is regulated by the air volume regulating device 3. At the same time, the mixture of wind/biomass fine powder with qualified concentration (required air-to-powder ratio is 1.4-1.8) is evenly distributed through the pulverized coal distributor 5 and then enters the primary air-powder pipe 9. Raw coal The raw coal in the bin 6 and the primary air in the primary fan 7 enter the coal grinder 8 at the same time. After the raw coal is ground into coal powder with acceptable fineness, the mixture of primary air/raw coal pulverized coal and the mixture of air/biomass fine powder are simultaneously Enter the primary air powder pipe 9 to form a mixture of primary air/raw coal powder/biomass fine powder (requirement 1: the mass ratio of biomass fine powder is 30%-50%, that is, the coal blending ratio is 70% -50%; Requirement 2: In terms of mass percentage, the ash composition of the mixture of raw coal pulverized coal and biomass: SiO 2 ≥ 40%, Al 2 O 3 ≥ 20%, Fe 2 O 3 ≤ 10%, CaO ≤ 20%, MgO≤5%, Fe 2 O 3 +CaO + MgO ≤ 20%, Na 2 O ≤ 3.0%, K 2 O ≤ 3%, Na 2 O + K 2 O ≤ 5.0%), then enters the burner 10 to ignite, and enters the furnace 11 to complete combustion.
本申请所述的一种提高煤粉锅炉深度调峰能力的系统及方法，可以提高煤粉锅炉的深度调峰能力，适用于高灰分劣质烟煤锅炉。The system and method for improving the deep peak-shaving capability of a pulverized coal boiler described in this application can improve the deep peak-shaving capability of a pulverized coal boiler and is suitable for boilers with high ash content and low-quality bituminous coal.
以上所述的具体实施方式，对本申请的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本申请的具体实施方式而已，并不用于限制本申请，凡在本申请的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。
The above-mentioned specific implementations further describe the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above-mentioned are only specific implementations of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.
Claims (9)
- 一种提高煤粉锅炉深度调峰能力的方法，其特征在于，利用锅炉一次风母管引出的带压风将生物质细粉送入一次风粉管道，生物质细粉与原煤煤粉混合后进入燃烧器(10)及炉膛(11)混合燃烧。A method for improving the deep peak-shaving capability of a pulverized coal boiler, which is characterized in that the pressurized air drawn from the primary air main pipe of the boiler is used to send biomass fine powder into the primary air powder pipe, and the biomass fine powder is mixed with raw coal pulverized Enter the burner (10) and the furnace (11) for mixed combustion.
- 根据权利要求1所述的一种提高煤粉锅炉深度调峰能力的方法，其特征在于，所述生物质是R90<10％的细粉，按质量百分比生物质的全水分Mt≤10％，收到基灰分Aar≤10％，干燥无灰基挥发分Vdaf≥70％，灰成分中的K2O≤10％。A method for improving the deep peak-shaving capability of a pulverized coal boiler according to claim 1, characterized in that the biomass is fine powder with R 90 <10%, and the total moisture content of the biomass M t ≤ 10 in terms of mass percentage %, the received base ash content A ar ≤ 10%, the dry ash-free base volatile content V daf ≥ 70%, and the K 2 O in the ash component ≤ 10%.
- 根据权利要求2所述的一种提高煤粉锅炉深度调峰能力的方法，其特征在于，按质量百分比，所述原煤煤粉和生物质混合物的灰成分中的SiO2≥40％、Al2O3≥20％、Fe2O3≤10％、CaO≤20％、MgO≤5％、Fe2O3+CaO+MgO≤20％、Na2O≤3.0％、K2O≤3％、Na2O+K2O≤5.0％。A method for improving the deep peak-shaving capability of a pulverized coal boiler according to claim 2, characterized in that, in terms of mass percentage, the ash component of the raw coal pulverized coal and biomass mixture contains SiO 2 ≥ 40%, Al 2 O 3 ≥20%, Fe 2 O 3 ≤10%, CaO ≤ 20%, MgO ≤ 5%, Fe 2 O 3 +CaO + MgO ≤ 20%, Na 2 O ≤ 3.0%, K 2 O ≤ 3%, Na 2 O+K 2 O≤5.0%.
- 根据权利要求3所述的一种提高煤粉锅炉深度调峰能力的方法，其特征在于，生物质细粉的质量掺烧比例在总入炉燃料质量的30％-50％。A method for improving the depth peak-shaving capability of a pulverized coal boiler according to claim 3, characterized in that the mass blending ratio of biomass fine powder is 30%-50% of the total mass of fuel entering the furnace.
- 根据权利要求3所述的一种提高煤粉锅炉深度调峰能力的方法，其特征在于，燃煤的质量掺烧比例在总入炉燃料质量的50％-70％。A method for improving the deep peak-shaving capability of a pulverized coal boiler according to claim 3, characterized in that the mass blending ratio of coal is between 50% and 70% of the total mass of fuel entering the furnace.
- 根据权利要求3所述的一种提高煤粉锅炉深度调峰能力的方法，其特征在于，风粉比在1.4-1.8。A method for improving the deep peak-shaving capability of a pulverized coal boiler according to claim 3, characterized in that the air-to-powder ratio is between 1.4 and 1.8.
- 根据权利要求3所述的一种提高煤粉锅炉深度调峰能力的方法，其特征在于，风/生物质细粉的混合物的温度在40-60℃。A method for improving the deep peak-shaving capability of a pulverized coal boiler according to claim 3, characterized in that the temperature of the air/biomass fine powder mixture is between 40-60°C.
- 一种提高煤粉锅炉深度调峰能力的系统，其特征在于，包括一次风母管(2)、风量调节装置(3)、粉仓(1)、给粉机(4)、风粉分配器(5)、原煤仓(6)、一次风机(7)、磨煤机(8)、一次风粉管道(9)、燃烧器(10)和炉膛(11)； A system for improving the deep peak-shaving capability of a pulverized coal boiler, which is characterized by including a primary air main pipe (2), an air volume adjustment device (3), a powder bin (1), a powder feeder (4), and an air powder distributor (5), raw coal bunker (6), primary fan (7), coal grinder (8), primary air powder pipe (9), burner (10) and furnace (11);风量调节装置(3)设置在一次风母管(2)引出的给粉风旁路管道上，下游连接给粉机(4)，给粉机(4)的入口连接粉仓(1)，给粉机(4)的出口连接风粉分配器(5)，风粉分配器(5)具有多个出口支路，与各一次风粉管道一一对应连接；一次风机(7)、磨煤机(8)、一次风粉管道(9)、燃烧器(10)、炉膛(11)为依次连接；其中一次风粉管道(9)的上游是风粉分配器(5)和磨煤机(8)的出口。The air volume adjustment device (3) is installed on the powder supply air bypass pipe led from the primary air main pipe (2), and is connected to the powder feeder (4) downstream. The inlet of the powder feeder (4) is connected to the powder bin (1). The outlet of the powder machine (4) is connected to the air powder distributor (5). The air powder distributor (5) has multiple outlet branches, which are connected to each primary air powder pipe in a one-to-one correspondence; the primary air fan (7), the coal grinder (8), the primary air powder duct (9), the burner (10), and the furnace (11) are connected in sequence; the upstream of the primary air powder duct (9) is the air powder distributor (5) and the coal mill (8) ) export.
- 根据权利要求8所述的一种提高煤粉锅炉深度调峰能力的系统，其特征在于，所述一次风母管(2)为锅炉的冷一次风母管和热一次风母管。 A system for improving the deep peak-shaving capability of a pulverized coal boiler according to claim 8, characterized in that the primary air main pipe (2) is a cold primary air main pipe and a hot primary air main pipe of the boiler.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007101135A (en) * | 2005-10-07 | 2007-04-19 | Ube Ind Ltd | Mixed combustion method of pulverized coal and biomass |
| CN110388639A (en) * | 2018-04-20 | 2019-10-29 | 张成军 | A kind of method of coal-burning power plant's coupled biological matter direct combustion power generation |
| CN112902146A (en) * | 2021-03-05 | 2021-06-04 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Pulverized coal boiler direct-fired biomass system and blending combustion method |
| CN114263926A (en) * | 2022-01-26 | 2022-04-01 | 西安热工研究院有限公司 | System and method for preventing and controlling slag bonding and contamination of high-alkali coal boiler |
| CN216924337U (en) * | 2021-09-29 | 2022-07-08 | 神华国华寿光发电有限责任公司 | Coal-fired and biomass coupling power generation system |
| CN115342341A (en) * | 2022-08-10 | 2022-11-15 | 西安热工研究院有限公司 | System and method for improving deep peak shaving capacity of pulverized coal fired boiler |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1230498C (en) * | 2004-01-18 | 2005-12-07 | 江苏大学 | Gasification method and device for biomass and coal mixed fluidized-bed |
| JP5051721B2 (en) * | 2008-05-16 | 2012-10-17 | 川崎重工業株式会社 | Biomass mixed combustion pulverized coal fired boiler |
| CN102585868A (en) * | 2012-02-13 | 2012-07-18 | 山西太钢不锈钢股份有限公司 | Coking coal blending method |
| CN108679599B (en) * | 2018-05-22 | 2020-06-26 | 华中科技大学 | Oxygen-enriched combustion method for mixing pulverized coal with biomass |
| CN112815303B (en) * | 2021-03-02 | 2024-09-27 | 烟台龙源电力技术股份有限公司 | Coal and biomass coupled combustion system and boiler |
| CN113446617A (en) * | 2021-07-28 | 2021-09-28 | 西安热工研究院有限公司 | Power generation system of pulverized coal burner direct-fired coupling living beings |
| CN215951485U (en) * | 2021-09-03 | 2022-03-04 | 神华国华寿光发电有限责任公司 | Biomass blending combustion system |
| CN216644258U (en) * | 2022-01-26 | 2022-05-31 | 西安热工研究院有限公司 | System for preventing and controlling high-alkali coal boiler slagging contamination |
| CN114593434A (en) * | 2022-01-27 | 2022-06-07 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Biomass coupling combustion system capable of meeting deep peak shaving of thermal power generating unit boiler |
| CN114811641A (en) * | 2022-02-17 | 2022-07-29 | 西安热工研究院有限公司 | System and method for blending and burning gasified fine slag in pulverized coal boiler in novel pulverized coal conveying mode |
-
2022
- 2022-08-10 CN CN202210957405.9A patent/CN115342341B/en active Active
-
2023
- 2023-04-23 WO PCT/CN2023/090024 patent/WO2024032029A1/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007101135A (en) * | 2005-10-07 | 2007-04-19 | Ube Ind Ltd | Mixed combustion method of pulverized coal and biomass |
| CN110388639A (en) * | 2018-04-20 | 2019-10-29 | 张成军 | A kind of method of coal-burning power plant's coupled biological matter direct combustion power generation |
| CN112902146A (en) * | 2021-03-05 | 2021-06-04 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Pulverized coal boiler direct-fired biomass system and blending combustion method |
| CN216924337U (en) * | 2021-09-29 | 2022-07-08 | 神华国华寿光发电有限责任公司 | Coal-fired and biomass coupling power generation system |
| CN114263926A (en) * | 2022-01-26 | 2022-04-01 | 西安热工研究院有限公司 | System and method for preventing and controlling slag bonding and contamination of high-alkali coal boiler |
| CN115342341A (en) * | 2022-08-10 | 2022-11-15 | 西安热工研究院有限公司 | System and method for improving deep peak shaving capacity of pulverized coal fired boiler |
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