CN110043918A - A kind of adjacent stove heating activation system with steam air heater - Google Patents
A kind of adjacent stove heating activation system with steam air heater Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
本发明公开了一种带暖风器的邻炉加热启动系统，包括：两个机组，机组包括低温省煤器、凝结水供暖风器、空预器、凝结水水箱，低温省煤器通过第一水路管道与凝结水水箱连通，低温省煤器通过第二水路管道与凝结水供暖风器连通，凝结水供暖风器通过第三水路管道与凝结水水箱连通，凝结水暖风器通过供风管道与空预器连通，两个机组的第一水路管道通过第七水路管道连通，两个机组的第三水路管道通过第八水路管道连通，A机组工作时，利用低温省煤器加热的高温闭式水加热暖风器，从而提高A机组空预器入口一、二次风温，节约空预器的加热成本，在B机组启动时，通过A机组的高温闭式水加热B机组的暖风器，降低B机组启动成本。
The invention discloses a heating and starting system for an adjacent furnace with an air heater, comprising: two units. The unit includes a low-temperature economizer, a condensed water heating fan, an air preheater, and a condensed water tank. The low-temperature economizer passes through the first The first water channel is connected to the condensate water tank, the low temperature economizer is connected to the condensate heater through the second water channel, the condensate heater is connected to the condensate water tank through the third water channel, and the condensate heater is connected to the air supply channel It is connected with the air preheater, the first water pipeline of the two units is connected through the seventh water pipeline, and the third water pipeline of the two units is connected through the eighth water pipeline. It can increase the temperature of the primary and secondary air at the inlet of the air preheater of unit A and save the heating cost of the air preheater. When the unit B starts up, the warm air of the unit B is heated by the high temperature closed water of the unit A. It can reduce the start-up cost of unit B.
Description
技术领域technical field
本发明涉及余热利用技术领域，尤其涉及一种带暖风器的邻炉加热启动系统。The invention relates to the technical field of waste heat utilization, in particular to a heating and starting system for an adjacent furnace with an air heater.
背景技术Background technique
近年来，随着国际油价的不断攀升和全球变暖趋势的加剧，节能减排已成为全社会共识，缩短机组的启动时间和优化机组的启动方式，也成为了投资方关注的重点。对于超超临界机组和直流锅炉设置锅炉启动系统，以保证机组低负荷运行时的安全，实现锅炉冷态、热态冲洗并节约工质和热量、并满足锅炉不同状态启动的需要。但由于该过程持续时间较长，需耗费大量燃油和燃煤。为了有效节约锅炉启动点火燃料消耗，目前国内很多工程已经考虑采用等离子点火或微油点火等点火方式，但即便如此，仍需要消耗一定的燃料。In recent years, with the continuous rise of international oil prices and the intensification of global warming, energy conservation and emission reduction have become the consensus of the whole society. Shortening the start-up time of units and optimizing the start-up method of units have also become the focus of investors. For ultra-supercritical units and once-through boilers, a boiler start-up system is set up to ensure the safety of the unit during low-load operation, to achieve boiler cold and hot flushing, saving working fluid and heat, and to meet the needs of boiler startup in different states. However, due to the long duration of this process, a large amount of fuel and coal is consumed. In order to effectively save fuel consumption for boiler startup ignition, many domestic projects have considered the use of plasma ignition or micro-oil ignition and other ignition methods, but even so, it still needs to consume a certain amount of fuel.
发明内容SUMMARY OF THE INVENTION
基于背景技术存在的技术问题，本发明提出了一种带暖风器的邻炉加热启动系统；Based on the technical problems existing in the background technology, the present invention proposes a heating and starting system for an adjacent furnace with an air heater;
本发明提出的一种带暖风器的邻炉加热启动系统，包括：第一机组和第二机组；The present invention proposes a heating and starting system for an adjacent furnace with an air heater, comprising: a first unit and a second unit;
第一机组包括第一低温省煤器、第一凝结水供暖风器、第一空预器、第一凝结水水箱，第一低温省煤器通过第一水路管道与第一凝结水水箱连通，第一低温省煤器通过第二水路管道与第一凝结水供暖风器连通，第一凝结水供暖风器通过第三水路管道与第一凝结水水箱连通，第一凝结水暖风器通过第一供风管道与第一空预器连通；The first unit includes a first low-temperature economizer, a first condensed water heater, a first air preheater, and a first condensed water tank, and the first low-temperature economizer is communicated with the first condensed water tank through a first water pipeline, The first low-temperature economizer is communicated with the first condensed water heater through the second waterway pipe, the first condensed water heater is communicated with the first condensed water tank through the third waterway pipeline, and the first condensed water heater is connected through the first condensed water heater. The air supply duct is communicated with the first air preheater;
第二机组包括第二低温省煤器、第二凝结水供暖风器、第二空预器、第二凝结水水箱，第二低温省煤器通过第四水路管道与第二凝结水水箱连通，第二低温省煤器通过第五水路管道与第二凝结水供暖风器连通，第二凝结水供暖风器通过第六水路管道与第二凝结水水箱连通，第二凝结水暖风器通过第二供风管道与第二空预器连通；The second unit includes a second low-temperature economizer, a second condensed water heater, a second air preheater, and a second condensed water tank, and the second low-temperature economizer communicates with the second condensed water tank through a fourth waterway pipeline, The second low-temperature economizer communicates with the second condensate air heater through the fifth waterway pipe, the second condensate air heater communicates with the second condensate water tank through the sixth waterway pipe, and the second condensate air heater passes through the second condensate water heater. The air supply duct is communicated with the second air preheater;
第二水路管道通过第七水路管道与第五水路管道连通，第三水路管道通过第八水路管道与第六水路管道连通。The second waterway pipeline communicates with the fifth waterway pipeline through the seventh waterway pipeline, and the third waterway pipeline communicates with the sixth waterway pipeline through the eighth waterway pipeline.
优选地，第七水路管道上设有第一调节阀，第八水路管道上设有第二调节阀。Preferably, the seventh water channel pipeline is provided with a first regulating valve, and the eighth water channel pipeline is provided with a second regulating valve.
优选地，第一水路管道上设有第一增压阀，第四水路管道上设有第二增压阀。Preferably, a first booster valve is provided on the first water channel pipe, and a second booster valve is provided on the fourth water channel pipeline.
本发明中，在A机组(第一机组或第二机组中某一机组)正常工作阶段，利用A机组经低温省煤器加热的高温闭式水加热暖风器，从而提高A机组的空预器入口一、二次风温，充分发挥低温省煤器的烟气余热利用的优势，在B机组(第一机组或第二机组中另一机组)处于启动阶段时，通过A机组利用经低温省煤器加热的高温闭式水加热B机组的暖风器，既可缩短B机组点火至机组整体协调运行的时间，也可减少B机组启动时燃料的消耗，降低B机组启动成本，对于缓解水冷壁横向裂纹、升温速率过快有明显效果。In the present invention, in the normal working stage of the A unit (one of the first unit or the second unit), the high temperature closed water heater of the A unit heated by the low temperature economizer is used to heat the air heater, thereby improving the air preconditioning of the A unit. The primary and secondary air temperatures at the inlet of the generator can be adjusted to give full play to the advantage of the waste heat utilization of the flue gas of the low-temperature economizer. When the B unit (the first unit or another unit in the second unit) is in the startup stage, the low temperature The high temperature closed water heater heated by the economizer to heat the air heater of the B unit can not only shorten the time from the ignition of the B unit to the overall coordinated operation of the unit, but also reduce the fuel consumption when the B unit is started, and reduce the start-up cost of the B unit. Transverse cracks in the water-cooled wall and too fast heating rate have obvious effects.
附图说明Description of drawings
图1为本发明提出的一种带暖风器的邻炉加热启动系统的结构示意图。FIG. 1 is a schematic structural diagram of an adjacent furnace heating and starting system with an air heater proposed by the present invention.
具体实施方式Detailed ways
图一中，1-第一机组，11-第一低温省煤器，12-第一凝结水供暖风器，13-第一空预器，14-第一凝结水水箱，15-第一水路管道，16-第二水路管道，17-第三水路管道，18-第一供风管道；2-第二机组，21-第二低温省煤器，22-第二凝结水供暖风器，23-第二空预器，24-第二凝结水水箱，25-第四水路管道，26-第五水路管道，27-第六水路管道，28-第二供风管道；3-第七水路管道，4-第八水路管道。In Figure 1, 1- the first unit, 11- the first low temperature economizer, 12- the first condensate heating fan, 13- the first air preheater, 14- the first condensate water tank, 15- the first water circuit Pipes, 16-second water pipeline, 17-third water pipeline, 18-first air supply pipeline; 2-second unit, 21-second low-temperature economizer, 22-second condensate heater, 23 - The second air preheater, 24- the second condensate water tank, 25- the fourth water pipeline, 26- the fifth water pipeline, 27- the sixth water pipeline, 28- the second air supply pipeline; 3- the seventh water pipeline , 4-8th waterway pipeline.
参照图1，本发明提出的一种带暖风器的邻炉加热启动系统，包括：第一机组和第二机组；Referring to Fig. 1, the present invention proposes a heating and starting system for an adjacent furnace with an air heater, including: a first unit and a second unit;
第一机组包括第一低温省煤器、第一凝结水供暖风器、第一空预器、第一凝结水水箱，第一低温省煤器通过第一水路管道与第一凝结水水箱连通，第一低温省煤器通过第二水路管道与第一凝结水供暖风器连通，第一凝结水供暖风器通过第三水路管道与第一凝结水水箱连通，第一凝结水暖风器通过第一供风管道与第一空预器连通；The first unit includes a first low-temperature economizer, a first condensed water heater, a first air preheater, and a first condensed water tank, and the first low-temperature economizer is communicated with the first condensed water tank through a first water pipeline, The first low-temperature economizer is communicated with the first condensed water heater through the second waterway pipe, the first condensed water heater is communicated with the first condensed water tank through the third waterway pipeline, and the first condensed water heater is connected through the first condensed water heater. The air supply duct is communicated with the first air preheater;
第二机组包括第二低温省煤器、第二凝结水供暖风器、第二空预器、第二凝结水水箱，第二低温省煤器通过第四水路管道与第二凝结水水箱连通，第二低温省煤器通过第五水路管道与第二凝结水供暖风器连通，第二凝结水供暖风器通过第六水路管道与第二凝结水水箱连通，第二凝结水暖风器通过第二供风管道与第二空预器连通；The second unit includes a second low-temperature economizer, a second condensed water heater, a second air preheater, and a second condensed water tank, and the second low-temperature economizer communicates with the second condensed water tank through a fourth waterway pipeline, The second low-temperature economizer communicates with the second condensate air heater through the fifth waterway pipe, the second condensate air heater communicates with the second condensate water tank through the sixth waterway pipe, and the second condensate air heater passes through the second condensate water heater. The air supply duct is communicated with the second air preheater;
第二水路管道通过第七水路管道与第五水路管道连通，第三水路管道通过第八水路管道与第六水路管道连通；第七水路管道上设有第一调节阀，第八水路管道上设有第二调节阀；第一水路管道上设有第一增压阀，第四水路管道上设有第二增压阀。The second waterway pipeline is connected with the fifth waterway pipeline through the seventh waterway pipeline, and the third waterway pipeline is connected with the sixth waterway pipeline through the eighth waterway pipeline; the seventh waterway pipeline is provided with a first regulating valve, and the eighth waterway pipeline is provided with a first regulating valve. There is a second regulating valve; a first pressure boosting valve is arranged on the first water channel pipeline, and a second pressure boosting valve is arranged on the fourth water channel pipeline.
在具体方案中，A机组(第一机组或第二机组中某一机组)汽机侧的凝结水水箱内的冷凝结水经A机组的低温省煤器的热烟气加热后，从低温省煤器流出的高温闭式水可流入A机组的凝结水供暖风器中，对进入凝结水供暖风器的冷风进行预加热后流回，进而提高A机组的空预器一、二次风温，通过余热利用降低A机组的空预器的能源消耗，从低温省煤器流出的高温闭式水的可进入处于启动阶段的B机组(第一机组或第二机组中令一机组)，借用A机组的高温闭式水对B机组的凝结水供暖风器进行加热，使其达到所需要的参数，该方式为邻炉加热，采用邻炉加热后，水冷壁的相变区大大提前，且热均匀性极为良好，降低了机组寿命损耗，减少了横向裂纹生成几率，启动速度大为提高，大大缩短了机组点火到整体协调运行的时间，节省了初始燃料的投用，启动时间缩短、启动流量降低，可避免了冷炉点火的未燃尽火焰直接冲刷对流受热面导致锅炉爆管现象的发生，避免了锅炉尾部可燃物的燃烧，显著提高了锅炉的启动安全性，第七水路管道上设有第一调节阀，第八水路管道上设有第二调节阀，通过开关调节阀，控制高温闭式水的流通。In the specific scheme, the condensed water in the condensed water tank on the steam turbine side of the A unit (the first unit or a certain unit of the second unit) is heated by the hot flue gas of the low-temperature economizer of the A unit, and the coal is saved from the low-temperature economizer. The high-temperature closed water flowing out of the air heater can flow into the condensate heating fan of unit A, and the cold air entering the condensing water heater can be preheated and then flow back, thereby increasing the primary and secondary air temperatures of the air preheater of unit A. The energy consumption of the air preheater of unit A is reduced by the utilization of waste heat, and the high-temperature closed water flowing from the low-temperature economizer can enter the unit B (one of the first unit or the second unit) that is in the start-up stage. The high-temperature closed water of the unit heats the condensed water heater of unit B to achieve the required parameters. This method is heating by the adjacent furnace. After heating by the adjacent furnace, the phase transition zone of the water wall is greatly advanced, and the heat The uniformity is extremely good, which reduces the life loss of the unit, reduces the probability of transverse crack generation, greatly improves the startup speed, greatly shortens the time from ignition of the unit to the overall coordinated operation, saves the initial fuel investment, shortens the startup time, and starts the flow rate. Reduced, it can avoid the occurrence of boiler tube burst caused by the unburned flame of the cold furnace ignition directly scouring the convection heating surface, avoid the combustion of combustibles at the tail of the boiler, and significantly improve the start-up safety of the boiler. There is a first regulating valve, and a second regulating valve is arranged on the eighth water pipeline, and the circulation of high temperature closed water is controlled by opening and closing the regulating valve.
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.
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|---|---|
| CN110043918B (en) | 2024-04-02 |
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