CN107036062A - A kind of central cooler waste gas and sintering smoke from big gas duct waste heat comprehensive utilization system - Google Patents
A kind of central cooler waste gas and sintering smoke from big gas duct waste heat comprehensive utilization system Download PDFInfo
- Publication number
- CN107036062A CN107036062A CN201710396129.2A CN201710396129A CN107036062A CN 107036062 A CN107036062 A CN 107036062A CN 201710396129 A CN201710396129 A CN 201710396129A CN 107036062 A CN107036062 A CN 107036062A
- Authority
- CN
- China
- Prior art keywords
- pressure
- waste heat
- low
- waste
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002918 waste heat Substances 0.000 title claims abstract description 83
- 238000005245 sintering Methods 0.000 title claims abstract description 51
- 239000007789 gas Substances 0.000 title claims abstract description 31
- 239000002912 waste gas Substances 0.000 title claims abstract description 20
- 239000000779 smoke Substances 0.000 title claims description 12
- 238000011084 recovery Methods 0.000 claims abstract description 22
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003546 flue gas Substances 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 70
- 239000003245 coal Substances 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000006392 deoxygenation reaction Methods 0.000 claims description 2
- 235000019504 cigarettes Nutrition 0.000 claims 2
- 238000010248 power generation Methods 0.000 abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229920006395 saturated elastomer Polymers 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 238000010795 Steam Flooding Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000003635 deoxygenating effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/10—Arrangements for using waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/16—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot liquid or hot vapour, e.g. waste liquid, waste vapour
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
本发明公开了一种环冷机废气与烧结大烟道烟气余热综合利用系统。包括环冷机前区余热回收装置、低压汽包和高压汽包，所述环冷机前区余热回收装置包括换热装置；所述换热装置包括箱体和设置在箱体内沿烟气流动方向依次设置的高压过热器、高压蒸发器、低压过热器、高压省煤器、低压蒸发器和低压省煤器。本发明回收了烧结大烟道中的高温烟气余热和环冷机的烧结矿冷却后废气的余热，不仅利用了环冷机Ⅲ区的低温废气余热，并且按照热力学第二定律，合理布置在环冷机余热回收装置和烧结大烟道中受热面，梯级回收尾部烟道中的烟气余热，产生两种高品质的蒸汽，提高了发电效率，同时采用单汽包回收烧结大烟道和环冷机废气中余热，减少了设备数量，降低了投资成本。
The invention discloses a system for comprehensively utilizing the waste heat of the exhaust gas of a ring cooler and the flue gas of a large sintering flue. It includes a waste heat recovery device in the front area of the annular cooler, a low-pressure steam drum and a high-pressure steam drum. The waste heat recovery device in the front area of the annular cooler includes a heat exchange device; the heat exchange device includes a box and is arranged in the box along the flue gas flow. High pressure superheater, high pressure evaporator, low pressure superheater, high pressure economizer, low pressure evaporator and low pressure economizer arranged in sequence. The invention recovers the waste heat of the high-temperature flue gas in the large sintering flue and the waste heat of the exhaust gas after cooling the sinter of the ring cooler, not only utilizes the waste heat of the low-temperature waste gas in the III zone of the ring cooler, but also reasonably arranges them in the ring according to the second law of thermodynamics. The waste heat recovery device of the refrigerator and the heating surface in the large sintering flue can recycle the waste heat of the flue gas in the tail flue in steps to generate two kinds of high-quality steam, which improves the power generation efficiency. The residual heat in the exhaust gas reduces the number of equipment and investment costs.
Description
技术领域technical field
本发明涉及一种烧结余热综合利用系统。The invention relates to a system for comprehensive utilization of sintering waste heat.
背景技术Background technique
烧结生产过程的余热资源主要包括烧结机烧结的高温废烟气余热和环冷机上的烧结矿冷却废气余热两部分，在烧结工序总能耗中，这两部分废气的余热带走近50％的热量。目前，烧结余热回收主要用于发电，以满足钢铁工艺用电需求或上网发电，减少钢铁厂的运行成本。现阶段国内大部分钢铁厂对环冷机上的烧结冷却废气仅仅回收了环冷机一段和二段的250～450℃的中温废气，对于三段上的100～150℃的低温废气不做回收，仅有少量钢铁厂对于烧结机烧结的高温烟气余热进行回收，且对于环冷机上的烧结冷却余热回收和烧结机烧结的高温废烟气余热回收是两个独立的回收系统，设备众多，投资大。The waste heat resources in the sintering production process mainly include two parts: the waste heat of high-temperature waste flue gas from sintering machine and the waste heat of sinter cooling waste gas on the ring cooler. In the total energy consumption of the sintering process, the waste heat of these two parts of waste gas is close to 50%. heat. At present, sintering waste heat recovery is mainly used for power generation to meet the electricity demand of iron and steel processing or to generate electricity on the grid to reduce the operating cost of iron and steel plants. At present, most domestic iron and steel plants only recycle the 250-450°C medium-temperature waste gas from the first and second stages of the ring cooler for the sintering cooling waste gas on the ring cooler, and do not recycle the 100-150°C low-temperature waste gas from the third stage. Only a small number of iron and steel plants recover the waste heat of high-temperature flue gas sintered by sintering machines, and the waste heat recovery of sintering cooling on the ring cooler and the waste heat of high-temperature waste flue gas sintered by sintering machines are two independent recovery systems, with a large number of equipment and investment big.
发明内容Contents of the invention
针对上述问题，本发明提供一种综合利用烧结大烟道烟气和环冷机废气余热，同时合理布置各受热面的烧结余热综合利用系统。In view of the above problems, the present invention provides a sintering waste heat comprehensive utilization system which comprehensively utilizes the flue gas of the sintering large flue and the waste heat of the exhaust gas of the annular cooler, and rationally arranges each heating surface at the same time.
为达到上述目的，本发明一种环冷机废气与烧结大烟道烟气余热综合利用系统，包括环冷机前区余热回收装置、低压汽包和高压汽包，所述环冷机前区余热回收装置包括换热装置；所述换热装置包括箱体和设置在箱体内沿烟气流动方向依次设置的高压过热器、高压蒸发器、低压过热器、高压省煤器、低压蒸发器和低压省煤器；In order to achieve the above-mentioned purpose, the present invention provides a comprehensive utilization system for the waste heat of the exhaust gas of the annular cooler and the flue gas of the sintering large flue, which includes a waste heat recovery device in the front area of the annular cooler, a low-pressure steam drum and a high-pressure steam drum, and the front area of the annular cooler The waste heat recovery device includes a heat exchange device; the heat exchange device includes a box body and a high-pressure superheater, a high-pressure evaporator, a low-pressure superheater, a high-pressure economizer, a low-pressure evaporator, and a Low pressure economizer;
其中所述高压过热器进气口通过管道与高压汽包蒸汽出口连通；所述高压蒸发器的出、入水口分别通过管道与高压汽包入水口和出水口连通；所述低压过热器的进气口通过管道与低压汽包蒸汽出口连通；所述高压省煤器的出、入水口分别通过管道与高压汽包入水口和低压汽包出水口连通；所述低压蒸发器的出、入水口分别通过管道与低压汽包入水口和出水口连通；所述低压省煤器的出、入水口分别通过管道与低压汽包入水口和低压省煤器给水管道连通；Wherein the air inlet of the high-pressure superheater communicates with the steam outlet of the high-pressure steam drum through a pipeline; the water outlet and water inlet of the high-pressure evaporator communicate with the water inlet and water outlet of the high-pressure steam drum through pipelines; the inlet of the low-pressure superheater The gas port is communicated with the steam outlet of the low-pressure steam drum through a pipeline; the outlet and water inlet of the high-pressure economizer are respectively communicated with the water inlet of the high-pressure steam drum and the water outlet of the low-pressure steam drum through pipelines; the outlet and water inlet of the low-pressure evaporator The water inlet and the water outlet of the low-pressure steam drum are communicated with the water inlet and the water outlet of the low-pressure economizer respectively through pipelines;
所述高压省煤器与所述低压汽包之间的管道上设置有给水泵。A feed pump is provided on the pipeline between the high-pressure economizer and the low-pressure steam drum.
进一步地，所述环冷机前区余热回收装置还包括：设置在环冷机Ⅰ区和Ⅱ区上方用于收集热烟风的集风装置和用于将降温后的烟风送至环冷机的送风装置；Further, the waste heat recovery device in the front area of the annular cooler also includes: an air collection device arranged above the zone I and zone II of the annular cooler for collecting hot smoke air and for sending the cooled smoke air to the annular cooler The air supply device of the machine;
所述集风装置、换热装置和送风装置依次连通形成循环的换热风路。The air collecting device, the heat exchanging device and the air supplying device are sequentially connected to form a circulating heat exchanging air path.
进一步地，还包括环冷机后区余热回收装置；Further, it also includes a waste heat recovery device in the rear area of the annular cooler;
所述后区余热回收装置包括设置在环冷机Ⅲ区上方的给水预热器，所述给水预热器的出水口通过管道与低压省煤器的水管道连通，所述给水预热器的入水口和给水预热器给水管道连通。The waste heat recovery device in the rear zone includes a feedwater preheater arranged above zone III of the annular cooler. The water outlet of the feedwater preheater is connected with the water pipeline of the low-pressure economizer through a pipeline. The water inlet is connected with the feed water pipe of the feed water preheater.
进一步地，还包括烧结大烟道余热回收装置；Further, it also includes a large sintering flue waste heat recovery device;
所述烧结大烟道余热回收装置包括设置在烧结大烟道内的蒸发器，所述蒸发器的出、入水口分别通过管道与高压汽包入水口和出水口连通。The waste heat recovery device of the large sintering flue includes an evaporator arranged in the large sintering flue, and the water outlet and the water inlet of the evaporator communicate with the water inlet and the water outlet of the high-pressure steam drum through pipes respectively.
进一步地，所述系统还包括余热发电装置，所述余热发电装置包括汽轮机和发电机；所述汽轮机和发电机通过联轴器连接；Further, the system also includes a waste heat power generation device, and the waste heat power generation device includes a steam turbine and a generator; the steam turbine and the generator are connected through a coupling;
所述汽轮机的进气口通过管道与高压过热器和低压过热器的出气口连通，蒸汽推动汽轮机转动做功传递到发电机上。The inlet of the steam turbine communicates with the gas outlets of the high-pressure superheater and the low-pressure superheater through pipelines, and the steam drives the steam turbine to rotate and transfer work to the generator.
进一步地，所述余热发电装置还包括冷凝器，所述冷凝器的入水口通过管道与汽轮机的出水口连通，所述冷凝器的出水口通过管道与给水预热器的给水管道连通。Further, the waste heat power generation device further includes a condenser, the water inlet of the condenser communicates with the water outlet of the steam turbine through a pipe, and the water outlet of the condenser communicates with the feed water pipe of the feed water preheater through a pipe.
进一步地，所述冷凝器与给水预热器的给水管道之间的管道上设置有凝结水泵。Further, a condensate pump is provided on the pipeline between the condenser and the feedwater pipeline of the feedwater preheater.
进一步地，所述低压汽包上设置有除氧器，用于给低压汽包中的水进行除氧。Further, the low-pressure steam drum is provided with a deaerator for deoxygenating the water in the low-pressure steam drum.
进一步地，所述汽轮机为补汽凝汽式汽轮机。Further, the steam turbine is an admission steam condensing steam turbine.
本发明回收了烧结工业生产中产生两种余热资源：烧结机烧结的高温烟气余热(烧结大烟道中)和环冷机上的烧结矿冷却后废气的余热，不仅利用了环冷机Ⅲ区的低温(100～150℃)废气余热，并且按照热力学第二定律，合理布置在环冷机余热回收装置和烧结大烟道中受热面，梯级回收尾部烟道中的烟气余热，产生两种高品质的过热蒸汽，提高了发电效率，同时采用单汽包回收烧结大烟道和环冷机废气中余热，减少了设备数量，降低了投资成本。The invention recycles two kinds of waste heat resources produced in the sintering industrial production: the waste heat of high-temperature flue gas from sintering of the sintering machine (in the large sintering flue) and the waste heat of the waste gas after cooling the sinter on the ring cooler. Low-temperature (100-150°C) exhaust gas waste heat, and according to the second law of thermodynamics, it is reasonably arranged on the heating surface of the waste heat recovery device of the ring cooler and the sintering flue, and the waste heat of the flue gas in the tail flue is recovered in steps to produce two high-quality products. The superheated steam improves the power generation efficiency. At the same time, a single steam drum is used to recover the waste heat in the sintering flue and the exhaust gas of the ring cooler, which reduces the number of equipment and investment costs.
附图说明Description of drawings
图1是一种环冷机废气与烧结大烟道烟气余热综合利用系统的结构示意图。Fig. 1 is a structural schematic diagram of a comprehensive utilization system of exhaust gas from an annular cooler and waste heat from flue gas from a sintering large flue.
环冷机1、余热锅炉单元2、循环风机3、烧结大烟道4、高压汽包5、低压汽包及除氧器6、给水泵7、补汽凝汽式汽轮机8、发电机9、冷凝器10、凝结水泵11、低温余热单元12、烧结大烟道蒸发器13、高压过热器201、高压蒸发器202、低压过热器203、高压省煤器204、低压蒸发器205、低压省煤器206、给水预热器1201。Annular cooler 1, waste heat boiler unit 2, circulating fan 3, large sintering flue 4, high-pressure steam drum 5, low-pressure steam drum and deaerator 6, feed water pump 7, steam-enhancing condensing steam turbine 8, generator 9, Condenser 10, condensate pump 11, low-temperature waste heat unit 12, sintered large flue evaporator 13, high-pressure superheater 201, high-pressure evaporator 202, low-pressure superheater 203, high-pressure economizer 204, low-pressure evaporator 205, low-pressure coal-saving Device 206, feed water preheater 1201.
需要说明的是，这些附图和文字描述并不旨在以任何方式限制本发明的构思范围，而是通过参考特定实施例为本领域技术人员说明本发明的概念。It should be noted that these drawings and text descriptions are not intended to limit the concept scope of the present invention in any way, but illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments.
具体实施方式detailed description
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对实施例中的技术方案进行清楚、完整地描述，以下实施例用于说明本发明，但不用来限制本发明的范围。In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention , but not to limit the scope of the present invention.
在本发明的描述中，需要说明的是，术语“上”、“下”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer" and the like are based on the orientation or positional relationship shown in the accompanying drawings, and are only for It is convenient to describe the present invention and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present invention.
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral Ground connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.
实施例1Example 1
如图1所示，本实施例回收的余热包括两部分：烧结机烧结的高温烟气余热(烧结大烟道中)和环冷机上的烧结矿冷却后废气的余热。余热锅炉单元2回收环冷机1中Ⅰ区和Ⅱ区中的废气余热，低温余热单元12回收环冷机Ⅲ区中的废气余热，烧结大烟道蒸发器13回收烧结机烧结的高温烟气余热。As shown in Figure 1, the waste heat recovered in this embodiment includes two parts: the waste heat of the high-temperature flue gas sintered by the sintering machine (in the large sintering flue) and the waste heat of the waste gas after cooling the sinter on the ring cooler. The waste heat boiler unit 2 recovers the waste heat of exhaust gas in zone I and zone II of the annular cooler 1, the low-temperature waste heat unit 12 recovers the waste heat of exhaust gas in zone III of the circular cooler, and the sintering large flue evaporator 13 recovers the high-temperature flue gas sintered by the sintering machine waste heat.
本实施例分为两部分，一部分为烟风系统，另一部分为汽水发电系统。This embodiment is divided into two parts, one part is the flue gas system, and the other part is the steam-water power generation system.
烟风系统：环冷机1上的Ⅰ区和Ⅱ区排出的高温废气通过管道接出并汇合，汇合后温度在250～450℃之间，然后接入余热锅炉单元2中，经过布置在其中的各受热蒸发面吸热后，温度降低至100～200℃，然后通过循环风机3打入环冷机1上Ⅰ区和Ⅱ区所对应的下部风箱中，废气吸收环冷机烧结矿中的显热后再次进入余热锅炉单元2中，完成一个废气循环过程。环冷机1上的Ⅲ区排气口排出的废气温度在100～200℃之间，通过低温余热单元12，被布置在其中的给水预热器1201换热后，温度降至60～120℃，然后排入大气中。烧结大烟道蒸发器13布置在烧结大烟道4中，吸收烧结线终点区域高温烟气(250～450℃)。Smoke and air system: the high-temperature exhaust gas discharged from the zone Ⅰ and zone Ⅱ on the ring cooler 1 is connected through the pipeline and merged. After the confluence, the temperature is between 250 and 450 ℃, and then connected to the waste heat boiler unit 2 and arranged in it After each heated evaporating surface absorbs heat, the temperature drops to 100-200°C, and then the circulating fan 3 is pumped into the lower bellows corresponding to the upper zone I and II of the ring cooler 1, and the exhaust gas absorbs the sintered ore of the ring cooler 1 After the sensible heat, it enters the waste heat boiler unit 2 again to complete a waste gas circulation process. The temperature of the exhaust gas discharged from the exhaust port of zone III on the annular cooler 1 is between 100 and 200°C. After passing through the low-temperature waste heat unit 12, the temperature drops to 60-120°C after heat exchange by the feed water preheater 1201 arranged therein. , and then released into the atmosphere. The large sintering flue evaporator 13 is arranged in the large sintering flue 4 to absorb high-temperature flue gas (250-450° C.) at the end area of the sintering line.
汽水发电系统：从凝汽器10来的凝结水经过凝结水泵11打入给水预热器1201中，吸收环冷机Ⅲ区排出的低温废气余热后，进入布置在余热锅炉单元2中的低压省煤器206中，在此吸收环冷机Ⅰ区和Ⅱ区的废气余热，然后进入低压汽包及除氧器6中；低压汽包及除氧器6与低压蒸发器205通过至少两路管道相互连接，水在低压蒸发器205中吸收废气的热量后转变为汽水混合物进入低压汽包及除氧器6中，此部分水力循环依靠低压蒸发器205进出口两端管道中介质的重度差完成，形成一个自然循环回路，生成的汽水混合物在低压汽包及除氧器6中完成自除氧及汽水分离过程，饱和蒸汽则进入低压过热器203中，吸收热量后变成高品质的过热蒸汽送入补汽凝汽式汽轮机8中做功，一部分饱和水再次进入低压蒸发器205，另外一部分饱和水经过给水泵7打入高压省煤器204中，经过换热升温后进入高压汽包5中；水在高压汽包5中分别进入烧结大烟道蒸发器13中和高压蒸发器202中，经过吸收大烟道烟气余热和环冷机废气余热后变成汽水混合物进入高压汽包5中，高压汽包5中的水在高压汽包5与烧结大烟道蒸发器13中是依靠烧结大烟道蒸发器13进出口两端管道中介质的重度差完成的，形成一个单独的自然循环回路，同样，高压汽包5中的水在高压汽包5与高压蒸发器202中是依靠高压蒸发器202进出口两端管道中介质的重度差完成的，形成一个单独的自然循环回路，产生的汽水混合物在高压汽包5中经过分离，饱和水继续进入烧结大烟道蒸发器13和高压蒸发器202中换热，饱和蒸汽则进入高压过热器201中，被环冷机废气加热后变为高品质的高压过热蒸汽进入补汽凝汽式汽轮机8中，推动汽轮机做功；补汽凝汽式汽轮机8和发电机9通过联轴器连接，蒸汽推动汽轮机转动做功传递到发电机上，继而变为电能，发电外输；做完功的高压过热蒸汽和低压过热蒸汽变为乏汽后进入凝汽器10，经过冷凝之后成为凝结水由凝结水泵11打入给水预热器1201中，完成一个汽水循环。Steam-water power generation system: the condensed water from the condenser 10 is injected into the feed water preheater 1201 through the condensed water pump 11, and after absorbing the waste heat of the low-temperature waste gas discharged from the zone III of the annular cooler, it enters the low-pressure province arranged in the waste heat boiler unit 2. In the coal burner 206, the waste heat of the exhaust gas in the zone I and zone II of the annular cooler is absorbed here, and then enters the low-pressure steam drum and deaerator 6; the low-pressure steam drum and deaerator 6 and the low-pressure evaporator 205 pass through at least two pipelines The water is connected to each other, and after absorbing the heat of the exhaust gas in the low-pressure evaporator 205, the water is converted into a steam-water mixture and enters the low-pressure steam drum and the deaerator 6. This part of the hydraulic cycle is completed by the gravity difference of the medium in the pipeline at both ends of the inlet and outlet of the low-pressure evaporator 205. , forming a natural circulation loop, the generated steam-water mixture completes the process of self-deoxygenation and steam-water separation in the low-pressure steam drum and deaerator 6, and the saturated steam enters the low-pressure superheater 203, and becomes high-quality superheated steam after absorbing heat Send it to the steam-enhancing condensing turbine 8 to do work, part of the saturated water enters the low-pressure evaporator 205 again, and the other part of the saturated water enters the high-pressure economizer 204 through the feed water pump 7, and enters the high-pressure steam drum 5 after heat exchange and heating Water enters the sintered large flue evaporator 13 and the high pressure evaporator 202 respectively in the high pressure steam drum 5, and becomes a mixture of steam and water after absorbing the waste heat of the large flue gas and the waste heat of the exhaust gas of the ring cooler and enters the high pressure steam drum 5 , the water in the high-pressure steam drum 5 is completed in the high-pressure steam drum 5 and the sintered large flue evaporator 13 by relying on the difference in gravity of the medium in the pipeline at both ends of the inlet and outlet of the sintered large flue evaporator 13, forming a separate natural circulation Circuit, similarly, the water in the high-pressure steam drum 5 is completed in the high-pressure steam drum 5 and the high-pressure evaporator 202 by relying on the gravity difference of the medium in the pipelines at both ends of the high-pressure evaporator 202, forming a separate natural circulation loop, resulting in The steam-water mixture is separated in the high-pressure steam drum 5, and the saturated water continues to enter the sintered large flue evaporator 13 and the high-pressure evaporator 202 for heat exchange, and the saturated steam enters the high-pressure superheater 201, where it is heated by the exhaust gas of the annular cooler and becomes The high-quality high-pressure superheated steam enters the steam-admission condensing turbine 8 to drive the steam turbine to do work; the steam-enrichment condensing turbine 8 and the generator 9 are connected through a coupling, and the steam drives the turbine to rotate and transfer the work to the generator, and then changes The high-pressure superheated steam and low-pressure superheated steam that have done work become exhausted steam and then enter the condenser 10. After condensation, it becomes condensed water and is pumped into the feedwater preheater 1201 by the condensed water pump 11 to complete a Soda cycle.
本发明回收了烧结工业生产中产生两种余热资源：烧结机烧结的高温烟气余热(烧结大烟道中)和环冷机上的烧结矿冷却后废气的余热，不仅利用了环冷机Ⅲ区的低温(100～150℃)废气余热，并且按照热力学第二定律，合理布置在环冷机余热回收装置和烧结大烟道中受热面，梯级回收尾部烟道中的烟气余热，产生两种高品质的过热蒸汽，提高了发电效率，同时采用单汽包回收烧结大烟道和环冷机废气中余热，减少了设备数量，降低了投资成本。The invention recycles two kinds of waste heat resources produced in the sintering industrial production: the waste heat of high-temperature flue gas from sintering of the sintering machine (in the large sintering flue) and the waste heat of the waste gas after cooling the sinter on the ring cooler. Low-temperature (100-150°C) exhaust gas waste heat, and according to the second law of thermodynamics, it is reasonably arranged on the heating surface of the waste heat recovery device of the ring cooler and the sintering flue, and the waste heat of the flue gas in the tail flue is recovered in steps to produce two high-quality products. The superheated steam improves the power generation efficiency. At the same time, a single steam drum is used to recover the waste heat in the sintering flue and the exhaust gas of the ring cooler, which reduces the number of equipment and investment costs.
以上，仅为本发明的较佳实施例，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，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应该以权利要求所界定的保护范围为准。The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention are all Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be defined by the claims.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710396129.2A CN107036062A (en) | 2017-05-26 | 2017-05-26 | A kind of central cooler waste gas and sintering smoke from big gas duct waste heat comprehensive utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710396129.2A CN107036062A (en) | 2017-05-26 | 2017-05-26 | A kind of central cooler waste gas and sintering smoke from big gas duct waste heat comprehensive utilization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107036062A true CN107036062A (en) | 2017-08-11 |
Family
ID=59539076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710396129.2A Pending CN107036062A (en) | 2017-05-26 | 2017-05-26 | A kind of central cooler waste gas and sintering smoke from big gas duct waste heat comprehensive utilization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107036062A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111964447A (en) * | 2020-08-31 | 2020-11-20 | 长沙跃奇节能电气设备有限公司 | Waste heat cyclic utilization's ceramic sintering system |
| CN115853609A (en) * | 2022-12-26 | 2023-03-28 | 东方电气集团东方汽轮机有限公司 | Iron-making process waste heat gradient comprehensive utilization system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776399A (en) * | 2010-02-10 | 2010-07-14 | 中冶长天国际工程有限责任公司 | Waste heat boiler for sintering circular cooler and heat-electricity combined supply system of waste heat boiler |
| CN201876144U (en) * | 2010-11-25 | 2011-06-22 | 中冶赛迪工程技术股份有限公司 | Sintering afterheat power generating system |
| CN205156647U (en) * | 2015-11-12 | 2016-04-13 | 南京凯盛开能环保能源有限公司 | Power generation system is jointly retrieved to improved generation sintering waste heat |
| CN205940176U (en) * | 2016-06-30 | 2017-02-08 | 中冶华天工程技术有限公司 | System is used multipurposely to cold quick -witted waste gas waste heat of ring |
| CN207006100U (en) * | 2017-05-26 | 2018-02-13 | 中冶华天南京工程技术有限公司 | A kind of central cooler waste gas and sintering smoke from big gas duct waste heat comprehensive utilization system |
-
2017
- 2017-05-26 CN CN201710396129.2A patent/CN107036062A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776399A (en) * | 2010-02-10 | 2010-07-14 | 中冶长天国际工程有限责任公司 | Waste heat boiler for sintering circular cooler and heat-electricity combined supply system of waste heat boiler |
| CN201876144U (en) * | 2010-11-25 | 2011-06-22 | 中冶赛迪工程技术股份有限公司 | Sintering afterheat power generating system |
| CN205156647U (en) * | 2015-11-12 | 2016-04-13 | 南京凯盛开能环保能源有限公司 | Power generation system is jointly retrieved to improved generation sintering waste heat |
| CN205940176U (en) * | 2016-06-30 | 2017-02-08 | 中冶华天工程技术有限公司 | System is used multipurposely to cold quick -witted waste gas waste heat of ring |
| CN207006100U (en) * | 2017-05-26 | 2018-02-13 | 中冶华天南京工程技术有限公司 | A kind of central cooler waste gas and sintering smoke from big gas duct waste heat comprehensive utilization system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111964447A (en) * | 2020-08-31 | 2020-11-20 | 长沙跃奇节能电气设备有限公司 | Waste heat cyclic utilization's ceramic sintering system |
| CN115853609A (en) * | 2022-12-26 | 2023-03-28 | 东方电气集团东方汽轮机有限公司 | Iron-making process waste heat gradient comprehensive utilization system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5897302B2 (en) | Steam turbine power generation system | |
| CN107941028B (en) | Sintering Cooling Exhaust Gas Waste Heat Power Generation System with Organic Rankine Cycle | |
| CN101915507B (en) | Method and device for power generation by utilizing steam generated from waste heat of steel mill in cascade mode | |
| CN106989611B (en) | Coke oven gas and dry quenching waste heat comprehensive power generation system | |
| CN110397481B (en) | Garbage incineration power generation device capable of improving main steam parameters | |
| CN201819201U (en) | Glass kiln pure low temperature waste heat power generation system | |
| CN108005744A (en) | Supercritical CO2The machine furnace cooling of circulation can recycle and power generation and heat supply integral system | |
| CN103353239A (en) | Improved lime kiln exhaust gas waste heat power generation system and power generation method thereof | |
| CN108590789A (en) | Coke oven raw gas sensible heat and red coke sensible heat combined power generation process and system | |
| CN104234761A (en) | Energy storage apparatus for the preheating of feed water | |
| CN105928372A (en) | Organic working medium Rankine cycle power generation system for recycling sintering process complementary energy | |
| CN201059879Y (en) | Cement kiln pure medium and low temperature waste heat power generation system | |
| CN207006100U (en) | A kind of central cooler waste gas and sintering smoke from big gas duct waste heat comprehensive utilization system | |
| CN106500082A (en) | A kind of gas generating system based on steel mill's saturated vapor Optimum utilization | |
| KR101967024B1 (en) | Supercritical CO2 power generation system of direct fired type | |
| CN101832718A (en) | Double-working substance heat source sintering cogeneration-type boiler system | |
| CN204827567U (en) | Many heats source of interchangeable formula waste heat generating set | |
| CN107036062A (en) | A kind of central cooler waste gas and sintering smoke from big gas duct waste heat comprehensive utilization system | |
| CN106643191A (en) | Power generation system based on steel smelting furnace and steel rolling heating furnace waste heat integration | |
| CN106766965A (en) | A kind of converter and heater for rolling steel waste heat integrated power generation system | |
| CN207730035U (en) | Sintering with Organic Rankine Cycle cools down power generation system using waste heat | |
| CN206094611U (en) | Take cement kiln waste heat power generation device of solar energy collection field | |
| CN205279773U (en) | Waste heat power generation system of cold machine of sintered ring | |
| CN206722889U (en) | A kind of central cooler low temperature waste gas and sintering smoke from big gas duct waste heat comprehensive utilization system | |
| CN207262396U (en) | A kind of dry coke quenching superpressure boiler therrmodynamic system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170811 |
|
| RJ01 | Rejection of invention patent application after publication |