CN105509089A - Oxygen-enriched combustion system - Google Patents

Oxygen-enriched combustion system Download PDF

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Publication number
CN105509089A
CN105509089A CN201610041452.3A CN201610041452A CN105509089A CN 105509089 A CN105509089 A CN 105509089A CN 201610041452 A CN201610041452 A CN 201610041452A CN 105509089 A CN105509089 A CN 105509089A
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China
Prior art keywords
flue gas
inlet
outlet
temperature flue
low
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CN201610041452.3A
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Chinese (zh)
Inventor
毛宇
王鹏
万太浩
陈灿
王树民
王锐
王慧芳
胡修奎
霍锁善
Original Assignee
中国神华能源股份有限公司
北京国华电力有限责任公司
神华国华(北京)电力研究院有限公司
东方电气集团东方锅炉股份有限公司
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Priority to CN201610041452.3A priority Critical patent/CN105509089A/en
Publication of CN105509089A publication Critical patent/CN105509089A/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/06Arrangements of devices for treating smoke or fumes of coolers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23LSUPPLYING 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
    • F23L7/00Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
    • F23L7/007Supplying oxygen or oxygen-enriched air
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage
    • Y02E20/34Indirect CO2 mitigation, i.e. by acting on non CO2 directly related matters of the process, e.g. more efficient use of fuels
    • Y02E20/344Oxyfuel combustion
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage
    • Y02E20/36Heat recovery other than air pre-heating
    • Y02E20/363Heat recovery other than air pre-heating at fumes level

Abstract

The invention relates to an oxygen-enriched combustion system. The oxygen-enriched combustion system comprises a boiler (1) and a coal mill (2). A hearth inlet (11) of the boiler is communicated with a coal mill outlet (22) of the coal mill. A hearth outlet (12) of the boiler is communicated with a coal mill inlet (21) of the coal mill. An oxygen injection device set for supplying oxygen to the boiler and a smoke cooling device for condensing at least one part of water in smoke are arranged on a pipeline between the hearth outlet and the coal mill inlet. According to the technical scheme, the smoke cooling device is arranged on the pipeline between the hearth outlet and the coal mill inlet, water vapor contained in the smoke is condensed to form liquid water through the cooling effect of the smoke cooling device, and the liquid water is drained from the pipeline between the hearth outlet and the coal mill inlet, so that the phenomenon that the hearth and pipelines in the boiler system are damaged due to the fact that water in smoke enters the hearth again is avoided.

Description

富氧燃烧系统 Oxyfuel combustion system

技术领域 FIELD

[0001]本发明涉及富氧燃烧技术,具体地,涉及一种富氧燃烧系统。 [0001] The present invention relates to oxyfuel technology, particularly, to an oxyfuel combustion system.

背景技术 Background technique

[0002]富氧燃烧技术是在现有电站锅炉系统基础上,以高于空气氧气含量的含氧气体进行燃烧的技术,是一种高效的节能燃烧技术。 [0002] oxyfuel boiler system in the prior art is based on the power plant, the oxygen-containing gas to be higher than the oxygen content of air combustion technology, it is an energy efficient combustion technology.

[0003]富氧燃烧技术主要特点包括:(I)用高纯度的O2和CO2混合气代替常规的助燃空气;(2)通过烟气再循环来获得较高体积浓度的CO2烟气;(3)以较小的代价冷凝压缩后实现CO2的封存或资源化利用,较为容易实现大规模化CO2富集和减排。 [0003] The main features oxyfuel technology comprising: (I) instead of the conventional combustion air with high purity mixed gas of O2 and CO2; (2) to obtain a higher flue gas CO2 concentration by volume of flue gas recirculation; (3 ) in order to condense the compressed after little cost or resource utilization to achieve sequestration of CO2, relatively easy to implement large-scale enrichment and reduce emissions of CO2. 由于这种燃烧方式与现有电站燃烧方式在技术具有良好的承接性,也容易被电力行业接受。 Because of this the conventional combustion plant with combustion in a good receiving of technology, but also likely to be accepted power industry.

[0004]现有技术中煤粉采用富氧燃烧时,与常规煤粉燃烧一样会产生大量的水分,如果直接将富氧燃烧产生的烟气作为再循环烟气,循环烟气中的水会随烟气循环而出现富集现象,又因为烟气中含有sox,水分与其结合后会形成酸性物质,从而对烟风道、炉膛、受热面等产生腐蚀,在炉内会产生严重的受热面的高温腐蚀。 [0004] When using the prior art pulverized coal oxyfuel combustion, the conventional pulverized coal combustion will produce the same lot of water, if the oxygen-enriched combustion fumes produced directly as recirculated flue gas, the flue gas circulation water will with the flue gas enrichment cycle occurs, and because the SOx-containing flue gas, moisture in connection with the formation of acids, which cause corrosion smoke duct, furnace, heating surface, etc., will have serious furnace heating surface high-temperature corrosion. 除此,在富氧燃烧系统的尾部低温烟道段会形成酸腐蚀,降低富氧锅炉系统烟风管道、设备的使用寿命。 In addition, in the rear section of the low-temperature flue oxyfuel combustion system will form acid corrosion, reduce the life of the boiler enriched Flue pipe system, device.

[0005]因此,需要提供一种能够除去烟气中水分的富氧燃烧系统。 [0005] Accordingly, it is necessary to provide a flue gas to remove moisture in the oxyfuel combustion system.

发明内容 SUMMARY

[0006]本发明的目的是提供一种富氧燃烧系统以将烟气中的水分去除。 [0006] The object of the present invention is to provide an oxyfuel combustion system to remove moisture in the flue gas.

[0007]为了实现上述目的,本发明提供一种富氧燃烧系统,其中,该富氧燃烧系统包括锅炉和磨煤机,所述锅炉的炉膛入口与所述磨煤机的磨煤机出口连通,所述锅炉的炉膛出口与所述磨煤机的磨煤机入口连通,在所述炉膛出口与所述磨煤机入口之间的管路上设置有用于向所述锅炉供应氧气的注氧装置组和用于使烟气内至少一部分水分冷凝的烟气冷却 [0007] To achieve the above object, the present invention provides an oxyfuel combustion system, wherein the oxyfuel combustion boiler system comprising a mill and communicates mill outlet of the boiler furnace and the inlet of the mill , furnace outlet and the inlet mill pulverizer communicates the boiler, is provided in the pipeline between the outlet of the furnace and the mill entrance of oxygen injection means for supplying oxygen to the boiler group and at least a portion for cooling the flue gas to flue gas condensation of moisture

目.ο Head .ο

[0008]优选地,所述富氧燃烧系统还包括第二烟气换热器,所述第二烟气换热器设置在所述炉膛出口与所述炉膛入口之间的管路上,所述第二烟气换热器包括第二高温烟气入口、第二高温烟气出口、第二低温烟气入口和第二低温烟气出口,所述烟气冷却装置包括冷却装置入口和冷却装置出口,所述第二高温烟气入口与所述炉膛出口连通,所述第二高温烟气出口与所述冷却装置入口连通,所述冷却装置出口与所述第二低温烟气入口连通,所述第二低温烟气出口通过两个管路与所述炉膛入口连通。 [0008] Preferably, the system further comprises a second oxygen-enriched combustion flue gas heat exchanger, the second heat exchanger is disposed in the flue gas path between the furnace tube outlet and the inlet of the furnace, the second flue gas heat exchanger comprises a second high temperature flue gas inlet, a second high temperature flue gas outlet, a second inlet and a second low-temperature low-temperature flue gas outlet flue gas, the flue gas cooling means includes a cooling inlet and a cooling device outlet means said second high temperature flue gas inlet in communication with the furnace outlet, the second outlet with the cooling high temperature flue gas inlet means in communication, the cooling device outlet communicating with the second low-temperature flue gas inlet, the second low-temperature flue gas outlet conduit in communication with the furnace via two inlets.

[0009]优选地,所述第二高温烟气出口与所述冷却装置入口连通的管路上设置有除尘装置和第二引风机,所述除尘装置、所述第二引风机以及所述烟气冷却装置依次连通。 [0009] Preferably, the second pipeline temperature flue gas outlet and the inlet of the cooling device is provided in communication with a dust removing device and a second fan, the dust removal means, the second lead and the flue gas fan cooling means in communication successively.

[0010]优选地,所述富氧燃烧系统还包括第一烟气换热器,所述第一烟气换热器设置于所述第二引风机与所述第二低温烟气入口连通的管路上,所述第一烟气换热器包括第一高温烟气入口、第一高温烟气出口、第一低温烟气入口和第一低温烟气出口,所述第一高温烟气入口与所述第二引风机连通,所述第一高温烟气出口与所述冷却装置入口连通,所述第一低温烟气入口与所述冷却装置出口连通,所述第一低温烟气出口与所述第二低温烟气入口连通。 [0010] Preferably, the system further comprises a first oxyfuel combustion flue gas heat exchanger, the first heat exchanger is disposed in the flue gas draft fan communicating with said second low-temperature flue gas inlet of the second pipeline, the first flue gas heat exchanger comprises a first high temperature flue gas inlet, a first high temperature flue gas outlet, the first inlet and a first cryogenic low temperature flue gas flue gas outlet, the first inlet and the high temperature flue gas the second draft fan communicating the first high temperature flue gas outlet in communication with the inlet of the cooling device, the first low-temperature flue gas inlet in communication with the cooling device outlet, the first outlet and the low-temperature flue gas said second low-temperature flue gas inlet in communication.

[0011 ]优选地,所述第一高温烟气出口和所述冷却装置入口之间的管路上设置有脱硫装置。 [0011] Preferably, the first line between the flue gas outlet temperature and the cooling means is provided with a desulfurization apparatus inlet.

[0012]优选地,所述富氧燃烧系统还包括尾气储存装置和/或烟囱,所述尾气储存装置的入口和/或所述烟囱的入口与所述脱硫装置的出口连通。 [0012] Preferably, the oxygen-rich combustion exhaust gas system further comprises storage means and / or the chimney, the exhaust outlet of the reservoir inlet means and / or the chimney inlet in communication with said desulfurizer.

[0013]优选地,所述富氧燃烧系统还包括尾气储存装置和/或烟囱,所述尾气储存装置的入口和/或所述烟囱的入口与所述第一低温烟气出口连通。 [0013] Preferably, the oxygen-rich combustion exhaust gas system further comprises storage means and / or stack, said exhaust gas inlet means and / or the chimney inlet in communication with the first low-temperature flue gas outlet of the reservoir.

[0014] 优选地,所述注氧装置组设置于所述第二低温烟气入口与所述第一低温烟气出口之间的管路上,所述注氧装置组包括第一引风机和注氧装置,所述注氧装置包括注氧装置入口和注氧装置出口,所述第一引风机的引风机入口与所述第一低温烟气出口连通,所述第一引风机的引风机出口与所述注氧装置入口连通,所述注氧装置出口与所述第二低温烟气入口连通。 [0014] Preferably, said oxygen injection means is provided to set the second line between the low-temperature flue gas inlet and flue gas outlet of the first low temperature, the oxygen injection means comprises a first set of injection and induced draft fan means oxygen, said oxygen injection means comprises an outlet and an inlet oxygen injection means oxygen injection means in communication with the ID fan inlet to the first outlet of the first low-temperature flue gas draft fan, draft fan blower outlet of the first lead oxygen injection means in communication with the inlet, the outlet of the oxygen injection means and said second low-temperature flue gas inlet in communication.

[0015]优选地,所述富氧燃烧系统还包括燃烧器,所述燃烧器设置于所述炉膛入口,所述燃烧器包括燃烧器出口、第一燃烧器入口和第二燃烧器入口,所述燃烧器出口与所述炉膛入口连通,所述第一燃烧器入口与所述磨煤机出口连通,所述磨煤机入口与所述第二低温烟气出口连通,所述第二燃烧器入口与所述第二低温烟气出口连通。 [0015] Preferably, the oxyfuel combustion system further comprises a combustor, the combustor inlet disposed in said furnace, said burner comprising a burner outlet, the first inlet of the burner and the second burner inlet, the said burner furnace inlet in communication with said outlet, said first burner inlet in communication with the outlet of mill, the mill inlet in communication with the second low-temperature flue gas outlet, said second combustor an inlet in communication with the second low-temperature flue gas outlet.

[0016] 优选地,所述注氧装置组有两个且并列设置,每个所述注氧装置组通过所述第二烟气加热器分别与所述第二燃烧器入口和所述磨煤机入口连通。 [0016] Preferably, said oxygen injection means are arranged in parallel and two groups, each group of said oxygen injection means by said second flue gas heater, respectively the second burner inlet and the grinding of coal inlet in communication.

[0017]通过上述技术方案,在炉膛出口和磨煤机入口之间的管路上设置烟气冷却装置,通过该烟气冷却装置的冷却作用将烟气中含有的水汽凝结形成液态水滴,并从该炉膛出口和磨煤机入口之间的管路中清除,从而可以防止烟气中的水分再次进入炉膛内对炉膛及锅炉系统的各管路造成损害。 [0017] Through the above technical solutions, in the line between the mill inlet and outlet of the furnace flue gas cooling means is provided, through which the flue gas cooling device cooling the water vapor contained in the flue gas condenses to form liquid droplets, and from line between the furnace outlet and the inlet mill cleared, so that the flue gas can be prevented from re-entering the moisture damage to the furnace and boiler system for each conduit of the furnace.

[0018]本发明的其它特征和优点将在随后的具体实施方式部分予以详细说明。 [0018] Other features and advantages of the present invention will be described in detail in a subsequent portion of the detailed description.

附图说明 BRIEF DESCRIPTION

[0019]附图是用来提供对本发明的进一步理解,并且构成说明书的一部分,与下面的具体实施方式一起用于解释本发明,但并不构成对本发明的限制。 [0019] The drawings are provided for further understanding of the invention and constitute a part of this specification, the following detailed description serve to explain the embodiments of the present invention, but not limit the present invention. 在附图中: In the drawings:

[0020]图1是本发明一种具体实施方式提供的富氧燃烧系统的流程图; [0020] FIG. 1 is a flowchart showing the oxyfuel combustion system according to an embodiment of the present invention DETAILED provided;

[0021]图2是本发明另一种具体实施方式提供的富氧燃烧系统的流程图; [0021] FIG 2 is a flowchart of the oxyfuel combustion system of another specific embodiment of the present invention provides;

[0022]图3是本发明另一种具体实施方式提供的富氧燃烧系统的流程图。 [0022] FIG. 3 is a flow diagram of the oxyfuel combustion system provides another specific embodiment of the present invention.

[0023]附图标记说明 [0023] REFERENCE NUMERALS

[0024] I锅炉 11炉膛入口 12炉膛出口 [0024] I Boiler Furnace 11 inlet 12 outlet furnace

[0025] 2磨煤机 21磨煤机入口 22磨煤机出口 [0025] 21 mill inlet 22 Mill 2 Mill Discharge

[0026] 3烟气冷却装置 31冷却装置入口 32冷却装置出口 [0026] 331 inlet flue gas cooling device cooling apparatus cooling means 32 outlet

[0027] 4第一烟气换热器41第一低温烟气入口42第一低温烟气出口 [0027] The first flue gas 4 first low temperature heat exchanger 41 the flue gas inlet 42 of the first low-temperature flue gas outlet

[0028] 43第一高温烟气入口44第一高温烟气出口5脱硫装置 [0028] 43 a first inlet 44 of the first high temperature flue gas outlet temperature flue gas desulfurization unit 5

[0029] 6燃烧器 61第一燃烧器入口 63第二燃烧器入口 [0029] 6 burner 61 first burner inlet 63 of the second combustor inlet

[0030] 7第二烟气换热器71第二高温烟气入口72第二高温烟气出口 [0030] 7 second flue gas heat exchanger 71 second 72 second high temperature flue gas inlet temperature flue gas outlet

[0031] 73第二低温烟气入口 74第二低温烟气出口 8注氧装置 [0031] The second low-temperature flue gas inlet 73 of the second low-temperature flue gas outlet 74 oxygen injection means 8

[0032] 81注氧装置入口 82注氧装置出口 9第一引风机 [0032] The oxygen injection means 81 inlet 82 outlet of the oxygen injection means 9 first draft fan

[0033] 10尾气储存装置 13烟囱 14除尘装置 [0033] The storage device 10 exhaust gas dust removal device 13 the stack 14

[0034] 15第二引风机 [0034] The second drawing fan 15

具体实施方式 Detailed ways

[0035]以下结合附图对本发明的具体实施方式进行详细说明。 [0035] The following specific embodiments of the present invention will be described in detail in conjunction with the accompanying drawings. 应当理解的是,此处所描述的具体实施方式仅用于说明和解释本发明,并不用于限制本发明。 It should be understood that the specific embodiments described herein are only to illustrate and explain the present invention and are not intended to limit the present invention.

[0036]在本发明中,在未作相反说明的情况下,使用的顺序词如“第一、第二”通常是为了能够更好地描述本发明,并不能说明构件具有先后主次之分。 [0036] In the present invention, have not been indicated to the contrary case, the order of use of the word such as "first, second," generally in order to better describe the present invention, has not described member having a primary or secondary .

[0037]为了实现上述目的,本发明提供一种富氧燃烧系统,其中,该富氧燃烧系统包括锅炉I和磨煤机2,所述锅炉I的炉膛入口11与所述磨煤机2的磨煤机出口22连通,所述锅炉I的炉膛出口12与所述磨煤机2的磨煤机入口21连通,在所述炉膛出口12与所述磨煤机入口21之间的管路上设置有用于向所述锅炉I供应氧气的注氧装置组和用于使烟气内至少一部分水分冷凝的烟气冷却装置3。 [0037] To achieve the above object, the present invention provides an oxyfuel combustion system, wherein the oxyfuel combustion boiler system comprising a mill and I 2, I the boiler furnace 11 to the mill inlet 2 mill outlet 22 communicates, the outlet of the boiler furnace 21 in communication with the mill 12, I 2 of the mill inlet 21 between the outlet 12 of the furnace inlet piping is provided mill there boiler for supplying oxygen to the oxygen injection means I is set, and means for cooling the flue gas within the flue gas condensing at least a portion of the water 3.

[0038]参照图1至图3,作为本发明一种优选的具体实施方式,锅炉内产生的烟气从炉膛出口排出并通入到烟气冷却装置3中,通过该烟气冷却装置3将烟气进行冷却使得烟气中的水蒸气冷却凝结为液态水并从管路中排出,干燥的烟气从烟气冷却装置3中排出并通过注氧装置组添加氧气并混合后进入到磨煤机2中,将磨煤机2中的煤粉输送到炉膛后并与煤粉一起参加燃烧反应。 [0038] Referring to FIGS. 1 to 3, the present invention is a preferred specific embodiment, the flue gas generated in the boiler furnace is discharged from the outlet and into the cooling device 3 into the flue gas, the flue gas by the cooling device 3 the flue gas is cooled so that water vapor in the flue gas is cooled and condensed to liquid water discharged from the conduit, the dry flue gas is discharged from the flue gas cooling device 3 and the addition of oxygen through the oxygen injection means and set into the grinding of coal mixed 2 in the machine, the mill 2 after the pulverized coal to the furnace and to participate in the reaction with the pulverized coal combustion. 由于烟气在再循环前已经完成了除水分的过程,从而避免了再循环过程中水分对炉膛及锅炉管路的损坏,提高了富氧燃烧系统的使用寿命。 Since the flue gas before the recirculation process has been completed addition of water, thus avoiding damage to the recycling process furnace and boiler water pipe, and increases the service life of the oxyfuel combustion system.

[0039]为了进一步提高能源的利用率,可以利用炉膛出口 12的烟气对参加再循环的烟气进行加热。 [0039] In order to further improve energy efficiency, can participate in the flue gas recirculation is heated by the furnace flue gas outlet 12. 继续参照图1至图3,作为本发明另一种优选的具体实施方式,所述富氧燃烧系统还包括第二烟气换热器7,所述第二烟气换热器7设置在所述炉膛出口12与所述炉膛入口11之间的管路上。 With continued reference to FIG. 1 to FIG. 3, as another embodiment of the present invention, preferred embodiments, the system further comprises a second oxygen-enriched combustion flue gas heat exchanger 7, and the second flue gas heat exchanger 7 disposed on the said outlet of the furnace 12 and the line between the furnace inlet 11. 具体地,所述第二烟气换热器7包括第二高温烟气入口71、第二高温烟气出口72、第二低温烟气入口73和第二低温烟气出口74,所述烟气冷却装置3包括冷却装置入口31和冷却装置出口32,所述第二高温烟气入口71与所述炉膛出口12连通,所述第二高温烟气出口72与所述冷却装置入口31连通,所述冷却装置出口32与所述第二低温烟气入口73连通,所述第二低温烟气出口74通过两个管路与所述炉膛入口11连通。 In particular, the second flue gas heat exchanger 7 comprises a second high temperature flue gas inlet 71, a second high temperature flue gas outlet 72, a second low-temperature flue gas inlet 73 and the second low temperature flue gas outlet 74, a flue the cooling device 3 comprises a cooling device inlet 31 and the cooling device outlet 32, communicating with the second inlet 71 of the high temperature flue gas furnace outlet 12, 72 communicates with the second outlet of the cooling high temperature flue gas inlet means 31, the cooling said second outlet means 32 and the low-temperature flue gas inlet 73 in communication, the second low-temperature flue gas outlet 74 in communication with the conduit 11 through two furnace inlet.

[0040]由于烟气冷却装置3的冷却作用,使得烟气温度在进入烟气冷却装置3前和经过烟气冷却装置3后存在较大差异,因此可以在炉膛出口12的管路上设置第二烟气换热器7,并设置为第二高温烟气出口72与冷却装置入口31连通,冷却装置出口32与第二低温烟气入口73连通,因此在第二烟气换热器7内,高温烟气能够对低温烟气进行预热,提高了能源的利用率。 [0040] Since the cooling effect of the cooling device 3 in the flue gas, the flue gas temperature such that there is a large difference in the cooling device 3 before entering the flue gas through the flue gas and the cooling device 3, so the chamber may be provided at the second outlet pipeline 12 flue gas heat exchanger 7, and a second set temperature flue gas outlet 72 in communication with the inlet of the cooling device 31, cooling device 73 communicates with the second outlet of the low-temperature flue gas inlet 32, so in the second flue gas heat exchanger 7, high temperature flue gas can be preheated low temperature flue gas, improve the utilization of energy.

[0041]为了使尾气在管路中顺畅流动,继续参照图1至图3,作为本发明一种优选的具体实施方式,第二高温烟气出口72与冷却装置入口31连通的管路上设置有除尘装置14和第二弓丨风机15,除尘装置14、第二引风机15以及烟气冷却装置3依次连通。 [0041] In order to make the exhaust gas smoothly flows in the pipeline, with continued reference to FIGS. 1 to 3, as a specific embodiment of the present invention a preferred embodiment, the second high temperature flue gas outlet 72 is provided with a cooling device inlet 31 communicating with a pipeline dust removing device 14 and the second bow Shu fan 15, the dust removing device 14, the induced draft fan 15 and a second flue gas cooling apparatus 3 sequentially communicated. 烟气经过除尘装置14后能够使烟气中的颗粒状杂质去除,防止该颗粒状杂质排放到空气中对大气造成污染,第二引风机15为管路中流动的烟气提供动力,从而使烟气的流动更加顺畅。 Flue gas 14 after dust removal device capable of removing particulate impurities in the flue gas, the particulate impurities to prevent air pollution caused by emissions into the atmosphere, the second lead 15 to power the fan flue gas flowing in the pipeline, so that flue gas flow more smoothly.

[0042]继续参照图1至图3,作为本发明另一种优选的具体实施方式,富氧燃烧系统还包括第一烟气换热器4,第一烟气换热器4设置于第二引风机15与第二低温烟气入口73连通的管路上,第一烟气换热器4包括第一高温烟气入口43、第一高温烟气出口44、第一低温烟气入口41和第一低温烟气出口42。 [0042] With continued reference to FIG. 1 to FIG. 3, as another preferred embodiment of the present invention DETAILED embodiments, the oxyfuel combustion system further comprises a first flue gas heat exchanger 4, a first flue gas heat exchanger disposed in the second 4 induced draft fan 15 and the second low-temperature flue gas inlet 73 communicating path, a first heat exchanger 4 comprises a first flue gas temperature flue gas inlet 43, a first high temperature flue gas outlet 44, a first inlet 41 and the low-temperature flue gas a low-temperature flue gas outlet 42. 具体地,第一高温烟气入口43与第二引风机15连通,第一高温烟气出口44与冷却装置入口31连通,第一低温烟气入口41与冷却装置出口32连通,第一低温烟气出口42与第二低温烟气入口73连通。 Specifically, the first high temperature flue gas inlet 43 communicates with the second drawing fan 15, a first high temperature flue gas outlet 44 in communication with the inlet of the cooling device 31, a first low-temperature flue gas inlet 41 communicates with the cooling device outlet 32, a first low smoke gas outlet 73 in communication with the second low-temperature flue gas inlet 42.

[0043]第一烟气换热器4与上述的第二烟气换热器7的作用类似,都是使用进入烟气冷却装置3前的烟气为经过烟气冷却装置3后的烟气进行加热的,以防止烟气温度过低对富氧燃烧系统管路造成低温腐蚀。 [0043] The first flue gas heat exchanger 4 and the action of the second flue gas heat exchanger 7, similar operations are used to enter the flue gas cooling device 3 before the flue gas through the flue gas to the flue gas cooling apparatus 3 heating, the flue gas temperature is too low to prevent low temperature corrosion due to the oxyfuel combustion system piping.

[0044]为了防止烟气对大气形成污染,继续参照图1至图3,作为一种优选的具体实施方式,第一高温烟气出口44和冷却装置入口31之间的管路上设置有脱硫装置5。 [0044] In order to prevent contamination of the flue gas to the atmosphere is formed, with continued reference to FIGS. 1 to 3, as a preferred embodiment, the first high-temperature flue gas outlet 44 and a cooling line between the inlet means 31 is provided with a desulfurization apparatus 5.

[0045]参照图3,作为本发明另一种优选的具体实施方式,富氧燃烧系统还包括尾气储存装置10和/或烟囱13,尾气储存装置10的入口和/或烟囱13的入口与脱硫装置5的出口连通。 [0045] Referring to FIG 3, as another preferred embodiment of the present invention DETAILED embodiments, the oxyfuel combustion system further comprises a storage device 10, the exhaust gas and / or the chimney 13, the inlet and / or exhaust chimney inlet 10 and the storage device 13 of the desulfurization communicating the outlet means 5. 经过除尘装置14和脱硫装置5对烟气进行处理后,烟气可以经过烟囱13排放到大气中,也可以进入到尾气储存装置10中进行储存。 After the dust removing device 14 and a flue gas desulfurization processing device 5, the flue gas can be discharged through the chimney 13 into the atmosphere, the exhaust gas may enter the storage means 10 for storage. 将尾气储存装置10和/或烟囱13设置于脱硫装置5的出口处,可以使需要进行再循环的烟气经过烟气冷却装置3,不需要参加再循环的烟气则无需经过烟气冷却装置3,减小了烟气冷却装置3的尺寸,从而降低了生产成本。 10 and / or exhaust chimney storage device 13 is provided at the outlet of the desulfurizer 5, the flue gas may be recirculated through the need for flue gas cooling device 3, it does not need to participate in the recirculated flue gas cooling apparatus without passing through the flue gas 3, the size of the flue gas cooling device 3, thus reducing production costs.

[0046]参照图1和图2,作为本发明一种优选的具体实施方式,富氧燃烧系统还包括尾气储存装置10和/或烟囱13,尾气储存装置10的入口和/或烟囱13的入口与第一低温烟气出口42连通。 [0046] Referring to FIGS. 1 and 2, as a preferred embodiment of the present invention DETAILED embodiments, the oxyfuel combustion system further comprises a storage device 10, the exhaust gas and / or stack 13, the exhaust gas inlet of the inlet of the storage device 10 and / or the chimney 13 It communicates with the first low-temperature flue gas outlet 42. 经过除尘装置14和脱硫装置5对烟气进行处理后,烟气可以经过烟囱13排放到大气中,也可以进入到尾气储存装置10中进行储存。 After the dust removing device 14 and a flue gas desulfurization processing device 5, the flue gas can be discharged through the chimney 13 into the atmosphere, the exhaust gas may enter the storage means 10 for storage.

[0047]参照图1至图3,作为一种优选的具体实施方式,注氧装置组设置于第二低温烟气入口73与第一低温烟气出口42之间的管路上,注氧装置组包括第一引风机9和注氧装置8,注氧装置8包括注氧装置入口81和注氧装置出口82,第一引风机9的引风机入口与第一低温烟气出口42连通,第一引风机9的引风机出口与所述注氧装置入口81连通,注氧装置出口82与第二低温烟气入口73连通。 [0047] Referring to FIGS. 1 to 3, as a preferred embodiment, the oxygen injection means disposed in the second group 73 and low flue gas inlet line between the first low-temperature flue gas outlet 42, oxygen injection means group 8, 8 oxygen injection means comprises an oxygen injection inlet 81 and the oxygen injection means outlet means 82, 42 communicate with the first draft fan draft fan 9 to the inlet of the first low-temperature flue gas outlet 9 comprises a first lead and oxygen injection means fan, a first draft fan draft fan outlet 9 communicates with the inlet of the oxygen injection means 81, 73 communicate with the oxygen injection means 82 and the second outlet of the low-temperature flue gas inlet. 烟气经过第一低温烟气出口42后,在第一引风机9的驱动作用下进入到注氧装置8内,在注氧装置8中与氧气混合,例如但不限于,注氧装置8中的注氧比例可以为21%_26%。 Flue gas through the first low-temperature flue gas outlet 42 after entering the driving action of the induced draft fan 9 to the first oxygen injection means 8, 8 in the oxygen injection means is mixed with oxygen, such as, but not limited to, the oxygen injection means 8 the oxygen injection ratio can be 21% _26%.

[0048]参照图1至图3,作为本发明另一种优选的具体实施方式,富氧燃烧系统还包括燃烧器6,燃烧器6设置于炉膛入口11,燃烧器6包括燃烧器出口、第一燃烧器入口61和第二燃烧器入口63,燃烧器出口与炉膛入口11连通,第一燃烧器入口61与磨煤机出口22连通,磨煤机入口21与第二低温烟气出口74连通,第二燃烧器入口63与第二低温烟气出口74连通。 [0048] Referring to FIGS. 1 to 3, as another embodiment of the present invention, preferred embodiment, the oxyfuel combustion system further comprises a burner 6, 6 disposed in the furnace burner inlet 11, the burner 6 includes a burner outlet section a combustor inlet 61 and a second burner inlet 63, an outlet in communication with the furnace burner inlet 11, an inlet 61 in communication with the first burner mill outlet 22, an inlet 21 communicating with the second cryogenic mill flue gas outlet 74 , a second burner inlet 63 in communication with the second low-temperature flue gas outlet 74. 经过第二烟气换热器7加热后的烟气从第二低温烟气出口74排出并分为两个管路,第一管路上可以设置有磨煤机2,烟气在该第一管路内流动并作为煤粉的输送介质将煤粉输送到第一燃烧器入口61内;第二低温烟气出口74可以通过第二管路直接与第二燃烧器入口63连通。 Second flue gas through the flue gas heat exchanger 7 and heat is discharged from the second conduit into two low temperature flue gas outlet 74, the first pipeline may be provided with a mill 2, the flue gas in the first tube the flow passage, and as a transport medium to deliver pulverized coal to the pulverized coal burner of the first inlet 61; a second low temperature flue gas outlet 74 may be in communication with the second burner 63 through the second inlet conduit directly. 混合有氧气的烟气与混合有煤粉的烟气经过燃烧器6后在炉膛内充分混合并参加燃烧反应。 Mixing the flue gas mixed with flue gas oxygen pulverized coal through the burner 6 and mixed well to participate in the combustion reaction in the furnace. 燃烧器6可以有多种形式,例如但不限于,可以采用四角切圆布置的直流燃烧器,也可以采用对冲布置的旋流燃烧器。 Burner 6 may take many forms, such as, but not limited to, may be employed a DC Tangentially arranged burners hedge swirl burner arrangement may also be employed.

[0049]参考图1,作为本发明一种优选的具体实施方式,注氧装置组有两个且并列设置,每个注氧装置组通过第二烟气加热器7分别与第二燃烧器入口63和磨煤机入口21连通。 [0049] Referring to FIG 1, as a preferred embodiment of the present invention DETAILED embodiments, the oxygen injection means are arranged in parallel and two groups, each group by a second oxygen injection means are gas-gas heater 7 and a second burner inlet 63 and inlet 21 communicates mill. 具体地,注氧装置组设置于第二低温烟气入口73与第一低温烟气出口42之间的管路上,且该注氧装置组有两个,一个注氧装置组通过第一管路与磨煤机入口21连通,另一个注氧装置组通过第二管路与第二燃烧器入口63连通。 Specifically, the oxygen injection means disposed in the second group 73 and low flue gas inlet line between the first low-temperature flue gas outlet 42, and the oxygen injection means two group, a group by first conduit means oxygen injection mill 21 communicates with the inlet, another group of the oxygen injection means 63 via a second conduit in communication with the second inlet of the burner. 为了给两个管路中的烟气加热,可以分别在第一管路和第二管路上设置第二烟气换热器7。 To two heated by flue gas line may be separately provided in the second flue gas heat exchanger 7 a first conduit and a second pipeline. 第一管路和第二管路上的注氧比例可以分别控制,例如但不限于,第一管路上注氧比例为10%-20%,第二管路上的注氧比例为25%-35%。 Oxygen injection ratio of the first and the second pipeline conduit may be separately controlled, for example, but not limited to, oxygen injection ratio of the first pipeline is 10% -20%, the oxygen injection ratio of the second pipeline is 25% -35% .

[0050]以上结合附图详细描述了本发明的优选实施方式,但是,本发明并不限于上述实施方式中的具体细节,在本发明的技术构思范围内,可以对本发明的技术方案进行多种简单变型,这些简单变型均属于本发明的保护范围。 [0050] described above in conjunction with the accompanying drawings of the preferred embodiment of the present invention, however, the present invention is not limited to the specific details of the above embodiment, within the technical scope of the spirit of the present invention, various technical solutions of the present invention. simple variations, these simple modifications belong to the scope of the present invention.

[0051]另外需要说明的是,在上述具体实施方式中所描述的各个具体技术特征,在不矛盾的情况下,可以通过任何合适的方式进行组合,为了避免不必要的重复,本发明对各种可能的组合方式不再另行说明。 [0051] Note further that each specific technical features of the above described embodiments, in the case where not contradictory, may be combined in any suitable manner, in order to avoid unnecessary repetition, the present invention each possible combinations without further explanation.

[0052]此外,本发明的各种不同的实施方式之间也可以进行任意组合,只要其不违背本发明的思想,其同样应当视为本发明所公开的内容。 [0052] Further, among various embodiments of the present invention may be arbitrarily combined as long as it does not violate the spirit of the invention, which should also be considered as the disclosure of the present invention.

Claims (10)

1.一种富氧燃烧系统,其特征在于,该富氧燃烧系统包括锅炉(I)和磨煤机(2),所述锅炉(I)的炉膛入口(11)与所述磨煤机(2)的磨煤机出口(22)连通,所述锅炉(I)的炉膛出口(12)与所述磨煤机(2)的磨煤机入口(21)连通,在所述炉膛出口(12)与所述磨煤机入口(21)之间的管路上设置有用于向所述锅炉(I)供应氧气的注氧装置组和用于使烟气内至少一部分水分冷凝的烟气冷却装置(3)。 An oxyfuel combustion system, characterized in that the oxyfuel combustion boiler system comprising a furnace inlet (I) and the mill (2), said boiler (I) (11) with said mill ( 2) the mill outlet (22) communicating said boiler (I) of the furnace outlet (12) and the mill (2) of the mill inlet (21) communicates the outlet (12 in the furnace line between) and the inlet of the mill (21) is provided for supplying oxygen to the boiler (I) and the group of the oxygen injection means for causing at least a portion of the condensed water in the flue gas flue gas cooling means ( 3).
2.根据权利要求1所述的富氧燃烧系统,其特征在于,所述富氧燃烧系统还包括第二烟气换热器(7),所述第二烟气换热器(7)设置在所述炉膛出口(12)与所述炉膛入口(11)之间的管路上,所述第二烟气换热器(7)包括第二高温烟气入口(71)、第二高温烟气出口(72)、第二低温烟气入口(73)和第二低温烟气出口(74),所述烟气冷却装置(3)包括冷却装置入口(31)和冷却装置出口(32),所述第二高温烟气入口(71)与所述炉膛出口(12)连通,所述第二高温烟气出口(72)与所述冷却装置入口(31)连通,所述冷却装置出口(32)与所述第二低温烟气入口(73)连通,所述第二低温烟气出口(74)通过两个管路与所述炉膛入口(11)连通。 The oxyfuel combustion system according to claim 1, wherein the combustion system further comprises a second oxygen-rich flue gas heat exchanger (7), said second flue gas heat exchanger (7) provided line between the outlet of the furnace (12) and the furnace inlet (11), said second flue gas heat exchanger (7) comprises a second high temperature flue gas inlet (71), a second high temperature flue gas an outlet (72), a second low-temperature flue gas inlet (73) and a second low-temperature flue gas outlet (74), a flue gas cooling means (3) includes a cooling inlet means (31) and the cooling device outlet (32), the said second high temperature flue gas inlet (71) and the furnace outlet (12) communicating the second high temperature flue gas outlet (72) and the cooling device inlet (31) communicating an outlet of the cooling means (32) communication with the second low-temperature flue gas inlet (73), the second low temperature flue gas outlet (74) in communication with the furnace via two inlet conduit (11).
3.根据权利要求2所述的富氧燃烧系统,其特征在于,所述第二高温烟气出口(72)与所述冷却装置入口(31)连通的管路上设置有除尘装置(14)和第二引风机(15),所述除尘装置(14)、所述第二引风机(15)以及所述烟气冷却装置(3)依次连通。 The oxyfuel combustion system according to claim 2, wherein said second high temperature flue gas outlet (72) and the inlet of the cooling means (31) is provided with a pipeline communicating the dust removing device (14) and the second draft fan (15), the dust removal means (14), the second lead fan (15) and said flue gas cooling means (3) are sequentially connected.
4.根据权利要求3所述的富氧燃烧系统,其特征在于,所述富氧燃烧系统还包括第一烟气换热器(4),所述第一烟气换热器(4)设置于所述第二引风机(15)与所述第二低温烟气入口(73)连通的管路上,所述第一烟气换热器(4)包括第一高温烟气入口(43)、第一高温烟气出口(44)、第一低温烟气入口(41)和第一低温烟气出口(42),所述第一高温烟气入口(43)与所述第二引风机(15)连通,所述第一高温烟气出口(44)与所述冷却装置入口(31)连通,所述第一低温烟气入口(41)与所述冷却装置出口(32)连通,所述第一低温烟气出口(42)与所述第二低温烟气入口(73)连通。 4. The oxyfuel combustion system according to claim 3, characterized in that the system further comprises a first oxyfuel combustion flue gas heat exchanger (4), the first flue gas heat exchanger (4) provided fan to the second lead (15) and the second pipeline cryogenic flue gas inlet (73) communicating said first flue gas heat exchanger (4) comprises a first high temperature flue gas inlet (43), a first high temperature flue gas outlet (44), a first low-temperature flue gas inlet (41) and a first low-temperature flue gas outlet (42), said first high temperature flue gas inlet (43) and the second draft fan (15 ) communicates said first high temperature flue gas outlet (44) and the inlet of the cooling device (31) in communication, the first low temperature flue gas inlet (41) communicating with an outlet of the cooling means (32), said first a low-temperature flue gas outlet (42) communicates with the second low-temperature flue gas inlet (73).
5.根据权利要求4所述的富氧燃烧系统,其特征在于,所述第一高温烟气出口(44)和所述冷却装置入口(31)之间的管路上设置有脱硫装置(5)。 The oxyfuel combustion system according to claim 4, wherein said first line between the high temperature flue gas outlet (44) and the cooling means inlet (31) is provided with a desulfurizer (5) .
6.根据权利要求5所述的富氧燃烧系统,其特征在于,所述富氧燃烧系统还包括尾气储存装置(10)和/或烟囱(13),所述尾气储存装置(10)的入口和/或所述烟囱(13)的入口与所述脱硫装置(5)的出口连通。 The oxyfuel combustion system according to claim 5, wherein said system further comprises oxygen-enriched combustion (10) and / or the stack (13) off-gas storage means, said storage means exhaust gas (10) inlet outlet and / or the chimney (13) and the inlet of the desulfurizer (5) communicates.
7.根据权利要求4所述的富氧燃烧系统,其特征在于,所述富氧燃烧系统还包括尾气储存装置(10)和/或烟囱13,所述尾气储存装置(10)的入口和/或烟囱13的入口与所述第一低温烟气出口(42)连通。 7. oxyfuel combustion system as claimed in claim 4, wherein said system further comprises oxygen-enriched combustion (10) and / or exhaust chimney storage device 13, the exhaust gas inlet and said storage means (10) is / or chimney (42) communicates with the first inlet 13 of the low-temperature flue gas outlet.
8.根据权利要求4所述的富氧燃烧系统,其特征在于,所述注氧装置组设置于所述第二低温烟气入口(73)与所述第一低温烟气出口(42)之间的管路上,所述注氧装置组包括第一引风机(9)和注氧装置(8),所述注氧装置(8)包括注氧装置入口(81)和注氧装置出口(82),所述第一引风机(9)的引风机入口与所述第一低温烟气出口(42)连通,所述第一引风机(9)的引风机出口与所述注氧装置入口(81)连通,所述注氧装置出口(82)与所述第二低温烟气入口(73)连通。 The oxyfuel combustion system according to claim 4, wherein said oxygen injection means disposed in said second set of low flue gas inlet (73) and the first low temperature flue gas outlet (42) of the pipeline between the oxygen injection means comprises a first set of induced draft fan (9) and oxygen injection means (8), said oxygen injection means (8) oxygen injection means comprises an inlet (81) and the oxygen injection means outlet (82 ), the first induced draft fan (9) of the first draft fan inlet and the low-temperature flue gas outlet (42) communicating said first induced draft fan (9) the outlet of the induced draft fan inlet means oxygen injection ( 81) communicates, said oxygen injection means outlet (82) communicates with the second low-temperature flue gas inlet (73).
9.根据权利要求2所述的富氧燃烧系统,其特征在于,所述富氧燃烧系统还包括燃烧器(6),所述燃烧器(6)设置于所述炉膛入口( 11),所述燃烧器(6)包括燃烧器出口、第一燃烧器入口(61)和第二燃烧器入口(63),所述燃烧器出口与所述炉膛入口(II)连通,所述第一燃烧器入口(61)与所述磨煤机出口(22)连通,所述磨煤机入口(21)与所述第二低温烟气出口(74)连通,所述第二燃烧器入口(63)与所述第二低温烟气出口(74)连通。 9. The oxyfuel combustion system according to claim 2, wherein said system further comprises oxyfuel combustion burner (6), said burner (6) provided on the furnace inlet (11), the said burner (6) includes a combustor outlet, the first inlet of the burner (61) and a second burner inlet (63), the combustor outlet and the inlet of the furnace (II) in communication, the first burner an inlet (61) of the mill outlet (22) communicating the mill inlet (21) communicates with the second low-temperature flue gas outlet (74), the second burner inlet (63) and (74) communicating said second low-temperature flue gas outlet.
10.根据权利要求9所述的富氧燃烧系统,其特征在于,所述注氧装置组有两个且并列设置,每个所述注氧装置组通过所述第二烟气加热器(7)分别与所述第二燃烧器入口(63)和所述磨煤机入口( 21)连通。 10. The oxyfuel combustion system according to claim 9, wherein said oxygen injection means are arranged in parallel and two groups, each group of said oxygen injection means by said second flue gas heater (7 ) respectively to the second inlet of the burner (63) and the mill inlet (21) communicates.
CN201610041452.3A 2016-01-21 2016-01-21 Oxygen-enriched combustion system CN105509089A (en)

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