CN108591985B - A combined waste heat utilization system structure - Google Patents
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- CN108591985B CN108591985B CN201810676093.8A CN201810676093A CN108591985B CN 108591985 B CN108591985 B CN 108591985B CN 201810676093 A CN201810676093 A CN 201810676093A CN 108591985 B CN108591985 B CN 108591985B
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- 239000002918 waste heat Substances 0.000 title claims abstract description 54
- 238000003723 Smelting Methods 0.000 claims abstract description 21
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 13
- 239000003546 flue gas Substances 0.000 description 13
- 239000000779 smoke Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 2
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- 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
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
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- 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
-
- 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
- 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
- F27D17/15—Arrangements for using waste heat using boilers
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
一种组合式余热利用系统结构，其可大大提高余热利用系统的余热利用效率，同时可有效避免资源浪费，降低设备投入成本，其包括余热锅炉，余热锅炉的出口侧顺序连接蒸发器段箱体、省煤器段箱体、空气预热器，余热锅炉包括至少三个，每个蒸发器段箱体内均设置有汽包，每个汽包分别通过饱和蒸汽引出管连通分气缸，分气缸通过饱和蒸汽引入管连通过热器箱体，空气预热器的出口侧分别与冶炼炉连通。
A combined waste heat utilization system structure can greatly improve the waste heat utilization efficiency of the waste heat utilization system, while effectively avoiding resource waste and reducing equipment investment costs. The waste heat boiler comprises a waste heat boiler, the outlet side of which is sequentially connected to an evaporator section box, an economizer section box, and an air preheater. The waste heat boiler comprises at least three, each evaporator section box is provided with a steam drum, each steam drum is connected to a sub-cylinder through a saturated steam outlet pipe, the sub-cylinder is connected to the superheater box through a saturated steam inlet pipe, and the outlet side of the air preheater is connected to a smelting furnace.
Description
技术领域Technical Field
本发明涉及余热锅炉技术领域，具体为一种组合式余热利用系统结构。The invention relates to the technical field of waste heat boilers, and in particular to a combined waste heat utilization system structure.
背景技术Background technique
合金在冶炼过程中存在着巨大的余热资源，为避免余热资源浪费，高温烟气余热回收日渐普及。目前，在生产中，为扩大规模企业会投产多台冶炼炉，且冶炼炉的热源、温度等烟气类型基本相同，为充分利用冶炼炉的余热资源，常常将产生余热的冶炼炉分别与各余热锅炉安装在一起布置成一组余热利用系统，但是现有技术中的余热利用系统的余热利用效率较低，冶炼炉产生的高温烟气经蒸发器、省煤器后直接排放，从而造成不必要的资源浪费，并且现有技术中常采用一台余热锅炉对应一台过热器的安装方式大大增加了设备投入成本。There are huge waste heat resources in the alloy smelting process. In order to avoid the waste of waste heat resources, high-temperature flue gas waste heat recovery is becoming more and more popular. At present, in production, in order to expand the scale, enterprises will put into production multiple smelting furnaces, and the heat source, temperature and other flue gas types of the smelting furnaces are basically the same. In order to make full use of the waste heat resources of the smelting furnaces, the smelting furnaces that generate waste heat are often installed together with each waste heat boiler to form a group of waste heat utilization systems. However, the waste heat utilization efficiency of the waste heat utilization system in the prior art is low. The high-temperature flue gas generated by the smelting furnace is directly discharged after passing through the evaporator and economizer, thereby causing unnecessary waste of resources. In addition, the prior art often adopts the installation method of one waste heat boiler corresponding to one superheater, which greatly increases the equipment investment cost.
发明内容Summary of the invention
针对现有技术中存在的余热利用系统的余热利用效率低，易造成资源浪费，设备投入成本高等问题，本发明提供了一种组合式余热利用系统结构，其可大大提高余热利用系统的余热利用效率，同时可有效避免资源浪费，降低设备投入成本。In view of the problems existing in the prior art such as low waste heat utilization efficiency, easy waste of resources, high equipment investment cost, etc., the present invention provides a combined waste heat utilization system structure, which can greatly improve the waste heat utilization efficiency of the waste heat utilization system, while effectively avoiding waste of resources and reducing equipment investment cost.
一种组合式余热利用系统结构，其包括余热锅炉，所述余热锅炉的出口侧顺序连接蒸发器段箱体、省煤器段箱体、空气预热器，其特征在于，A combined waste heat utilization system structure includes a waste heat boiler, the outlet side of which is sequentially connected to an evaporator section box, an economizer section box, and an air preheater, characterized in that:
所述余热锅炉包括至少三个，每个所述蒸发器段箱体内均设置有汽包，每个所述汽包分别通过饱和蒸汽引出管连通分气缸，所述分气缸通过饱和蒸汽引入管连通过热器箱体；The waste heat boiler comprises at least three, each of which is provided with a steam drum in the evaporator section box, each of which is connected to a sub-cylinder through a saturated steam outlet pipe, and the sub-cylinder is connected to the heat exchanger box through a saturated steam inlet pipe;
所述空气预热器的出口侧分别与冶炼炉连通。The outlet sides of the air preheaters are respectively communicated with the smelting furnaces.
其进一步特征在于，Its further characteristic is that
所述过热器箱体内包括顺次设置的低温过热器、高温过热器，所述过热器箱体的顶端设置有喷水减温器，；靠近所述高温过热器的一侧设置有过热蒸汽出口；The superheater box includes a low-temperature superheater and a high-temperature superheater arranged in sequence, a water spray desuperheater is arranged at the top of the superheater box, and a superheated steam outlet is arranged on the side close to the high-temperature superheater;
所述过热器箱体的一侧靠近所述高温过热器的位置设置有燃烧室，所述燃烧室内设置有燃烧器，所述燃烧室的出口与所述冶炼炉连通；A combustion chamber is arranged at a position near the high-temperature superheater on one side of the superheater housing, a burner is arranged in the combustion chamber, and an outlet of the combustion chamber is communicated with the smelting furnace;
所述余热锅炉均为卧式结构钢刷清灰余热锅炉；The waste heat boilers are all horizontal structure steel brush cleaning waste heat boilers;
所述空气预热器均立式布置；The air preheaters are all arranged vertically;
所述省煤器段箱体的一侧靠近所述连接烟道的位置均设置有锅炉给水泵，所述省煤器段箱体内的省煤器通过所述锅炉给水泵与除氧水设备连通；A boiler feed water pump is provided on one side of the economizer section box body near the connecting flue, and the economizer in the economizer section box body is connected to the deoxygenated water equipment through the boiler feed water pump;
所述蒸发器段箱体内设置有分别与所述汽包连通的下降管、上升管；The evaporator section box is provided with a downcomer and an upcomer respectively connected to the steam drum;
所述余热锅炉通过进口烟箱与所述蒸发器段箱体连通。The waste heat boiler is connected to the evaporator section box through an inlet smoke box.
采用本发明的上述结构，每个汽包分别通过饱和蒸汽引出管、饱和蒸汽引入管与一台过热器箱体连通，减少了过热器的投入数量，从而大大降低了设备投入成本；冶炼炉产生的高温烟气分别经由各余热锅炉引入，并分别经过蒸发器段箱体、省煤器段箱体加热蒸发，再由连接烟道转入各自的空气预热器加热后引出至冶炼炉中，从而实现了对余热烟气的进一步吸收利用，大大提高了余热利用系统的余热利用效率。By adopting the above structure of the present invention, each steam drum is connected with a superheater box through a saturated steam outlet pipe and a saturated steam inlet pipe, thereby reducing the number of superheaters invested, thereby greatly reducing the equipment investment cost; the high-temperature flue gas generated by the smelting furnace is introduced through each waste heat boiler, and is heated and evaporated by the evaporator section box and the economizer section box respectively, and then transferred to the respective air preheaters through the connecting flue for heating and then led out to the smelting furnace, thereby realizing further absorption and utilization of the waste heat flue gas, and greatly improving the waste heat utilization efficiency of the waste heat utilization system.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本发明的结构示意图。FIG1 is a schematic structural diagram of the present invention.
具体实施方式Detailed ways
如图1所示，一种组合式余热利用系统结构，其包括三个余热锅炉1，三个余热锅炉1均为卧式结构钢刷清灰余热锅炉，每个余热锅炉1分别顺序连接蒸发器段箱体2、省煤器段箱体3，蒸发器段箱体2内设置有下降管21、上升管22，汽包4分别通过下降管21、上升管22及循环泵（图中未画出）实现除氧水在蒸发器段箱体2内的循环，省煤器段箱体3的一侧靠近连接烟道5的位置均设置有锅炉给水泵11，省煤器段箱体3内的省煤器通过锅炉给水泵与除氧水设备（图中未画出）连通，省煤器段箱体3通过连接烟道5与空气预热器6的一侧连通，空气预热器6均为立式布置，空气预热器6的另一侧分别与冶炼炉（图中未画出）连通；每个蒸发器段箱体2内均设置有汽包，每个汽包4分别通过饱和蒸汽引出管71连通分气缸7，分气缸7通过饱和蒸汽引入管72顺次连通过热器箱体8内的低温过热器81、高温过热器82，低温过热器81、高温过热器82之间设置有喷水减温器83；靠近高温过热器82的一侧设置有过热蒸汽出口84，过热器箱体8的一侧靠近高温过热器82的位置设置有燃烧室9，燃烧室9内设置有燃烧器；余热锅炉1通过进口烟箱10与蒸发器段箱体2连通。As shown in FIG1 , a combined waste heat utilization system structure includes three waste heat boilers 1, all of which are horizontal steel brush ash-cleaning waste heat boilers. Each waste heat boiler 1 is sequentially connected to an evaporator section box 2 and an economizer section box 3. A downcomer 21 and an upcomer 22 are provided in the evaporator section box 2. The drum 4 realizes the circulation of deoxygenated water in the evaporator section box 2 through the downcomer 21, the upcomer 22 and a circulation pump (not shown in the figure). A boiler feed water pump 11 is provided on one side of the economizer section box 3 near the position connecting the flue 5. The economizer in the economizer section box 3 is connected to the deoxygenated water equipment (not shown in the figure) through the boiler feed water pump. The economizer section box 3 is connected to the flue 5 and the air preheater 6 on one side. The air preheaters 6 are arranged vertically, and the other sides of the air preheaters 6 are connected to the smelting furnace (not shown in the figure); each evaporator section box 2 is provided with a steam drum, and each steam drum 4 is connected to the sub-cylinder 7 through a saturated steam outlet pipe 71, and the sub-cylinder 7 is connected to the low-temperature superheater 81 and the high-temperature superheater 82 in the superheater box 8 in sequence through the saturated steam inlet pipe 72, and a water spray desuperheater 83 is arranged between the low-temperature superheater 81 and the high-temperature superheater 82; a superheated steam outlet 84 is arranged on the side close to the high-temperature superheater 82, and a combustion chamber 9 is arranged on one side of the superheater box 8 close to the high-temperature superheater 82, and a burner is arranged in the combustion chamber 9; the waste heat boiler 1 is connected to the evaporator section box 2 through the inlet smoke box 10.
其具体工作原理如下所述：本实施例中的冶炼炉为硅铁冶炼炉，各余热锅炉1产生的余热烟气经进口烟箱10引入蒸发器段箱体2中，分别经过蒸发器段箱体2、省煤器段箱体3，再由连接烟道5转入各自的空气预热器6加热后引出至冶炼炉中，空气预热器6的设置可提高对余热烟气的进一步吸收利用，提高锅炉的利用率，并且烟气经空气预热器6加热后的热风进入冶炼炉中，提高了冶炼炉的进口空气温度，降低了冶炼炉的能耗；空气预热器6立式布置，使烟气方向与烟尘的沉降方向一致，利于清灰；燃烧室9内的燃烧器产生的补燃烟气经过过热器箱体8后引入各余热锅炉1的进口烟箱10内，补燃烟气经过上述循环过程后产生的高温烟气引出至冶炼炉中，从而实现了对余热烟气的进一步吸收利用，大大提高了余热利用系统的余热利用效率；除氧水装置中的除氧水通过锅炉给水泵11引入省煤器段箱体3中，除氧水经过省煤器段箱体3进入汽包4中，除氧水进入汽包4后再由下降管21通过循环泵引至蒸发器段箱体2内，除氧水经蒸发器段箱体2内的蒸发器加热蒸发后产生的汽水混合物经由上升管22引入汽包4，将每个汽包4内的蒸汽通过饱和蒸汽引出管71引入分气缸7后进行混合，再将混合后的蒸汽分别通过饱和蒸汽引入管连通至过热器箱体8内进行加热，喷水减温器83对过热器箱体8内的低温过热器81、高温过热器82具有调温的作用，混合后的蒸汽分别经低温过热器81、高温过热器82加热后的过热蒸汽经过热蒸汽出口84送至汽轮机（图中未画出）进行发电，从而进一步提高了余热锅炉余热蒸汽的利用率。Its specific working principle is as follows: the smelting furnace in this embodiment is a ferrosilicon smelting furnace, and the waste heat flue gas generated by each waste heat boiler 1 is introduced into the evaporator section box 2 through the inlet smoke box 10, passes through the evaporator section box 2 and the economizer section box 3 respectively, and then is transferred to the respective air preheaters 6 through the connecting flue 5 for heating and then led out to the smelting furnace. The arrangement of the air preheater 6 can improve the further absorption and utilization of the waste heat flue gas, improve the utilization rate of the boiler, and the hot air after the flue gas is heated by the air preheater 6 enters the smelting furnace, which increases the inlet air temperature of the smelting furnace and reduces the energy consumption of the smelting furnace; the air preheater 6 is arranged vertically, so that the direction of the flue gas is consistent with the settling direction of the smoke dust, which is conducive to cleaning; the supplementary combustion flue gas generated by the burner in the combustion chamber 9 is introduced into the inlet smoke box 10 of each waste heat boiler 1 after passing through the superheater box 8, and the high-temperature flue gas generated by the supplementary combustion flue gas after the above-mentioned circulation process is led out to the smelting furnace, thereby realizing the further absorption and utilization of the waste heat flue gas, greatly improving the waste heat The waste heat utilization efficiency of the utilization system is improved; the deoxygenated water in the deoxygenated water device is introduced into the economizer section box 3 through the boiler feed water pump 11, and the deoxygenated water enters the steam drum 4 through the economizer section box 3. After the deoxygenated water enters the steam drum 4, it is led to the evaporator section box 2 through the downcomer 21 through the circulation pump. The steam-water mixture generated after the deoxygenated water is heated and evaporated by the evaporator in the evaporator section box 2 is introduced into the steam drum 4 through the riser 22, and the steam in each steam drum 4 is introduced into the sub-cylinder 7 through the saturated steam lead-out pipe 71 and then mixed, and then the mixed steam is connected to the superheater box 8 through the saturated steam lead-in pipe for heating, and the water spray desuperheater 83 has a temperature regulating effect on the low-temperature superheater 81 and the high-temperature superheater 82 in the superheater box 8. The superheated steam after the mixed steam is heated by the low-temperature superheater 81 and the high-temperature superheater 82 is sent to the steam turbine (not shown in the figure) through the hot steam outlet 84 for power generation, thereby further improving the utilization rate of the waste heat steam of the waste heat boiler.
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| CN208475293U (en) * | 2018-06-27 | 2019-02-05 | 江苏太湖锅炉股份有限公司 | A kind of combined type afterheat utilizing system structure |
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| JP4478674B2 (en) * | 2006-12-26 | 2010-06-09 | カワサキプラントシステムズ株式会社 | Cement firing plant waste heat power generation system |
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