CN209341854U - A flue air device for efficient recovery of electric furnace flue gas waste heat system - Google Patents
A flue air device for efficient recovery of electric furnace flue gas waste heat system Download PDFInfo
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- CN209341854U CN209341854U CN201822069547.3U CN201822069547U CN209341854U CN 209341854 U CN209341854 U CN 209341854U CN 201822069547 U CN201822069547 U CN 201822069547U CN 209341854 U CN209341854 U CN 209341854U
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- 239000002918 waste heat Substances 0.000 title claims abstract description 45
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000003546 flue gas Substances 0.000 title claims abstract description 42
- 238000011084 recovery Methods 0.000 title claims abstract description 18
- 238000002485 combustion reaction Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000011449 brick Substances 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 230000035939 shock Effects 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000009826 distribution Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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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Abstract
本实用新型提供了一种高效回收电炉烟气余热系统的烟风装置，包括电炉；所述电炉炉顶设有第四孔；所述第四孔右侧连接固定有四孔水冷弯头；所述四孔水冷弯头一侧末端与水冷滑套连接；所述水冷滑套位于水冷烟道上；所述水冷烟道下侧末端连接固定有绝热燃烧沉降室；所述绝热燃烧沉降室一端连接绝热烟道；所述绝热烟道一侧连接固定有余热锅炉；所述余热锅炉上部出口处连接固定有第一连接管道；所述第一连接管道一侧末端连接固定有袋式除尘器；所述袋式除尘器上部出口处连接固定有第二连接管道；所述第二连接管道一侧末端连接固定有引风机；所述引风机通过第三连接管道连接烟囱。本实用新型设计合理，结构新颖，余热回收效率高，具有较强的实用性。
The utility model provides a flue gas device for efficiently recovering the waste heat of electric furnace flue gas, which includes an electric furnace; the top of the electric furnace is provided with a fourth hole; the right side of the fourth hole is connected and fixed with a four-hole water-cooled elbow; The end of one side of the four-hole water-cooled elbow is connected to the water-cooled sliding sleeve; the water-cooled sliding sleeve is located on the water-cooled flue; the lower end of the water-cooled flue is connected and fixed with an adiabatic combustion settling chamber; A flue; one side of the adiabatic flue is connected and fixed with a waste heat boiler; the upper outlet of the waste heat boiler is connected and fixed with a first connecting pipe; the end of one side of the first connecting pipe is connected and fixed with a bag filter; the A second connecting pipe is connected and fixed at the outlet of the upper part of the bag filter; one side end of the second connecting pipe is connected and fixed with an induced draft fan; the induced draft fan is connected to the chimney through a third connecting pipe. The utility model has reasonable design, novel structure, high waste heat recovery efficiency and strong practicability.
Description
技术领域technical field
本实用新型涉余热回收设备，具体是一种高效回收电炉烟气余热系统的烟风装置。The utility model relates to waste heat recovery equipment, in particular to a flue gas device for efficiently recovering the waste heat system of electric furnace flue gas.
背景技术Background technique
电炉炼钢过程中会产生大量的高温含尘烟气，烟气显热占电炉炼钢总能耗的10％以上。目前国内对烟气冷却方式主要为水冷方式，即冶炼所产生的一次烟气从其第四孔抽出，经水冷弯头、水冷滑套、水冷烟道、燃烧沉降室冷却后，再经空冷器或喷雾冷却塔降到约350℃，最后与来自大密闭罩及屋顶除尘罩温度为60℃的二次废气相混合，混合后的废气温度低于130℃，进除尘器净化，并经风机排往大气。该方式实现了烟气降温除尘的目的，缺点是：一方面消耗大量的电能和水，另一方面大量高温烟气的热量没有得到回收利用。In the process of electric furnace steelmaking, a large amount of high-temperature dusty flue gas is produced, and the sensible heat of the flue gas accounts for more than 10% of the total energy consumption of electric furnace steelmaking. At present, the domestic flue gas cooling method is mainly water-cooled, that is, the primary flue gas generated by smelting is extracted from the fourth hole, cooled by water-cooled elbow, water-cooled sliding sleeve, water-cooled flue, combustion and settling chamber, and then passed through an air cooler Or spray the cooling tower down to about 350°C, and finally mix it with the secondary exhaust gas from the large airtight cover and the roof dust cover with a temperature of 60°C. to the atmosphere. This method achieves the purpose of flue gas cooling and dust removal. The disadvantages are: on the one hand, it consumes a lot of electric energy and water, and on the other hand, the heat of a large amount of high-temperature flue gas has not been recycled.
针对以上现状及问题，一种高效回收电炉烟气余热的系统，攻克了电炉烟气余热回收长期存在的间隔生产、高温、易爆等难题，该系统将高温烟气从电炉炉顶(第四孔)抽出，经水冷弯头、水冷滑套、水冷烟道，在绝热燃烧沉降室充分燃烧，然后烟气继续流经绝热烟道进入余热锅炉，经过换热后烟温降至约180℃，通过管道送至除尘系统净化达标后排入大气，通过该系统可减少水的消耗，并实现余热回收利用，达到节能增效的效果，本余热回收系统主要包括烟风系统。In view of the above status quo and problems, a high-efficiency electric furnace flue gas waste heat recovery system overcomes the long-standing problems of interval production, high temperature, and explosives in electric furnace flue gas waste heat recovery. Hole), through the water-cooled elbow, water-cooled sliding sleeve, water-cooled flue, fully burned in the adiabatic combustion settling chamber, and then the flue gas continues to flow through the adiabatic flue into the waste heat boiler, after heat exchange, the flue gas temperature drops to about 180 ℃, It is sent to the dust removal system through pipelines and discharged into the atmosphere after being purified to the standard. Through this system, water consumption can be reduced, and waste heat can be recovered and utilized to achieve the effect of energy saving and efficiency enhancement. The waste heat recovery system mainly includes the flue gas system.
发明内容Contents of the invention
本实用新型的目的在于提供一种高效回收电炉烟气余热系统的烟风装置，以解决上述背景技术中提出的问题。The purpose of this utility model is to provide a flue gas device for the high-efficiency recovery system of electric furnace flue gas waste heat, so as to solve the problems raised in the above-mentioned background technology.
为实现上述目的，本实用新型提供如下技术方案：In order to achieve the above object, the utility model provides the following technical solutions:
一种高效回收电炉烟气余热系统的烟风装置，包括电炉；所述电炉炉顶设有第四孔；所述第四孔右侧连接固定有四孔水冷弯头；所述四孔水冷弯头一侧末端与水冷滑套连接；所述水冷滑套位于水冷烟道上；所述水冷烟道下侧末端连接固定有绝热燃烧沉降室；所述绝热燃烧沉降室一端连接固定有绝热烟道；所述绝热烟道一侧连接固定有余热锅炉；所述余热锅炉上部出口处连接固定有第一连接管道；所述第一连接管道一侧末端连接固定有袋式除尘器；所述袋式除尘器上部出口处连接固定有第二连接管道；所述第二连接管道一侧末端连接固定有引风机；所述引风机通过第三连接管道连接烟囱。A flue air device for efficient recovery of electric furnace flue gas waste heat system, comprising an electric furnace; the electric furnace roof is provided with a fourth hole; the right side of the fourth hole is connected and fixed with a four-hole water-cooled elbow; the four-hole water-cooled elbow The end on one side of the head is connected to the water-cooling sliding sleeve; the water-cooling sliding sleeve is located on the water-cooling flue; the lower end of the water-cooling flue is connected and fixed with an adiabatic combustion settling chamber; one end of the adiabatic combustion settling chamber is connected and fixed with an adiabatic flue; One side of the adiabatic flue is connected and fixed with a waste heat boiler; the upper outlet of the waste heat boiler is connected and fixed with a first connecting pipe; one side end of the first connecting pipe is connected and fixed with a bag filter; the bag filter A second connecting pipe is connected and fixed at the outlet of the upper part of the device; an induced draft fan is connected and fixed at one end of the second connecting pipe; the induced draft fan is connected to the chimney through a third connecting pipe.
作为本实用新型进一步的方案：所述绝热燃烧沉降室采用耐火砖、保温砖及耐火浇注料等砌筑而成，沉降室四周炉墙采用四层结构，分别为耐火层、保温层、绝热层以及混凝土结构。炉顶采用平吊顶，沉降室开有大门便于停炉时清灰。As a further solution of the utility model: the adiabatic combustion settling chamber is built with refractory bricks, heat insulating bricks and refractory castables, etc., and the furnace walls around the settling chamber adopt a four-layer structure, which are refractory layer, heat preservation layer, and heat insulation layer. and concrete structures. The roof of the furnace adopts a flat ceiling, and the settling chamber has a door to facilitate ash cleaning when the furnace is shut down.
作为本实用新型进一步的方案：所述余热锅炉为立式钢管下进风式锅炉，独立钢结构支架，采用自然循环方式，由I级蒸发器、II级蒸发器、汽包、蓄热器、省煤器、给水泵和除氧器构成整个汽水系统。As a further solution of the utility model: the waste heat boiler is a vertical steel pipe bottom air inlet boiler, an independent steel structure support, adopts a natural circulation mode, and consists of a grade I evaporator, a grade II evaporator, a steam drum, a heat accumulator, Economizer, feed water pump and deaerator constitute the whole soda water system.
作为本实用新型进一步的方案：所述除氧器通过给水泵与省煤器入口相连。As a further solution of the utility model: the deaerator is connected to the inlet of the economizer through a feed water pump.
作为本实用新型进一步的方案：所述省煤器出口与汽包入口相连；所述汽包布置在余热锅炉顶部，其饱和蒸汽出口与蓄热器相连，其饱和水出口与II级蒸发器入口及I级蒸发器入口相连；所述II级蒸发器出口及I级蒸发器的出口通过上升管接入汽包。As a further solution of the present utility model: the outlet of the economizer is connected to the inlet of the steam drum; the steam drum is arranged on the top of the waste heat boiler, its saturated steam outlet is connected to the heat accumulator, and its saturated water outlet is connected to the inlet of the II-stage evaporator It is connected with the inlet of the first-stage evaporator; the outlet of the second-stage evaporator and the outlet of the first-stage evaporator are connected to the steam drum through the riser pipe.
作为本实用新型进一步的方案：所述余热锅炉其底部设置有沉降灰斗。As a further solution of the utility model: the bottom of the waste heat boiler is provided with a settling ash hopper.
作为本实用新型进一步的方案：所述余热锅炉本体安装有激波清灰装置，用以清除受热面的积灰；所述激波清灰装置由燃气罐、输送分配管道等组成。As a further solution of the utility model: the waste heat boiler body is equipped with a shock wave ash removal device to remove ash accumulation on the heating surface; the shock wave ash removal device is composed of a gas tank, a transmission and distribution pipeline, and the like.
与现有技术相比，本实用新型的有益效果是：Compared with the prior art, the beneficial effects of the utility model are:
本实用新型通过设置绝热燃烧沉降室采用耐火砖、保温砖及耐火浇注料等砌筑而成，沉降室四周炉墙采用四层结构，分别为耐火层、保温层、绝热层以及混凝土结构。炉顶采用平吊顶，沉降室开有大门便于停炉时清灰，高温烟气在绝热燃烧沉降室中充分燃烧，有效地克服了电炉烟气波动造成蒸汽波动频繁而难以工业化利用的困难，充分利用电炉烟气的余热资源，降低生产能耗，节约能源；烟气从锅炉下部进入，尾部排出，且其底部设置有沉降段，还设有激波清灰装置，结构新颖，设计合理，使烟气充分冷却，排烟温度低，回收效率高；本实用新型设计合理，结构新颖，余热回收效率高，具有较强的实用性。The utility model adopts refractory bricks, thermal insulation bricks and refractory castables to build the adiabatic combustion settling chamber. The furnace wall around the settling chamber adopts four-layer structure, which are refractory layer, thermal insulation layer, thermal insulation layer and concrete structure. The roof of the furnace adopts a flat ceiling, and the settling chamber has a door to facilitate ash cleaning when the furnace is shut down. The high-temperature flue gas is fully burned in the adiabatic combustion settling chamber, which effectively overcomes the difficulty of frequent steam fluctuations caused by electric furnace flue gas fluctuations and is difficult for industrial use. Use the waste heat resources of electric furnace flue gas to reduce production energy consumption and save energy; the flue gas enters from the lower part of the boiler and is discharged from the tail, and the bottom is equipped with a settling section and a shock wave cleaning device. The structure is novel and the design is reasonable. The flue gas is fully cooled, the exhaust gas temperature is low, and the recovery efficiency is high; the utility model has reasonable design, novel structure, high waste heat recovery efficiency, and strong practicability.
附图说明Description of drawings
图1为本实用新型的结构示意图。Fig. 1 is the structural representation of the utility model.
图2为本实用新型余热锅炉内部的示意图。Fig. 2 is a schematic diagram of the interior of the waste heat boiler of the present invention.
图中：1-电炉，2-第四孔，3-四孔水冷弯头，4-水冷滑套，5-水冷烟道，6-绝热沉降室，7-绝热烟道，8-余热锅炉，9-第一连接管道，10-袋式除尘器，11-第二连接管道，12-引风机，13-第三连接管道，14-烟囱，15-除氧器，16-给水泵，17-省煤器，18-汽包，19-I级蒸发器，20-II级蒸发器，21-蓄热器。In the figure: 1-electric furnace, 2-fourth hole, 3-four-hole water-cooled elbow, 4-water-cooled sliding sleeve, 5-water-cooled flue, 6-insulated settling chamber, 7-insulated flue, 8-waste heat boiler, 9-first connecting pipe, 10-bag filter, 11-second connecting pipe, 12-induced fan, 13-third connecting pipe, 14-chimney, 15-deaerator, 16-feed water pump, 17- Economizer, 18-steam drum, 19-level I evaporator, 20-level II evaporator, 21-regenerator.
具体实施方式Detailed ways
下面结合具体实施方式对本专利的技术方案作进一步详细地说明。The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.
请参阅图1-2，一种高效回收电炉烟气余热系统的烟风装置，包括电炉1；所述电炉1炉顶设有第四孔2；所述第四孔2将电炉1中的高温烟气抽出，其右侧连接固定有四孔水冷弯头3；所述四孔水冷弯头3一侧末端与水冷滑套4连接；所述水冷滑套4位于水冷烟道5上；所述水冷烟道5下侧末端连接固定有绝热沉降室6；所述绝热燃烧沉降室采用耐火砖、保温砖及耐火浇注料等砌筑而成，沉降室四周炉墙采用四层结构，分别为耐火层、保温层、绝热层以及混凝土结构。炉顶采用平吊顶，高温烟气在绝热燃烧沉降室5中充分燃烧；绝热燃烧沉降室6一端连接固定有绝热烟道7；所述绝热烟道7一侧连接固定有余热锅炉8；所述余热锅炉8为立式钢管余热锅炉，为下进风式锅炉，独立钢结构支架，布置在车间外，采用自然循环方式，由I级蒸发器、II级蒸发器、汽包、蓄热器、省煤器、给水泵和除氧器构成整个汽水系统；所述除氧器15通过给水泵16与省煤器17入口相连；省煤器17出口与汽包18入口相连；所述汽包18布置在余热锅炉8顶部，其饱和蒸汽出口与蓄热器21相连，其饱和水出口与II级蒸发器20入口及I级蒸发器19入口相连；所述II级蒸发器20出口及I级蒸发器19的出口通过上升管接入汽包18。余热锅炉8上部出口处连接固定有第一连接管道9；所述第一连接管道9一侧末端连接固定有袋式除尘器10；所述袋式除尘器10上部出口处连接固定有第二连接管道11；所述第二连接管道11一侧末端连接固定有引风机12；所述引风机12通过第三连接管道13连接烟囱14。Please refer to Figure 1-2, a flue gas device for an efficient recovery system of electric furnace flue gas waste heat, including an electric furnace 1; a fourth hole 2 is provided on the top of the electric furnace 1; The flue gas is extracted, and a four-hole water-cooled elbow 3 is connected and fixed on the right side; the end of one side of the four-hole water-cooled elbow 3 is connected to the water-cooled sliding sleeve 4; the water-cooled sliding sleeve 4 is located on the water-cooled flue 5; The lower end of the water-cooled flue 5 is connected and fixed with an adiabatic settling chamber 6; the adiabatic combustion settling chamber is made of refractory bricks, heat insulating bricks and refractory castables, etc. The furnace walls around the settling chamber adopt a four-layer structure, which are refractory layers, thermal insulation, insulation and concrete structures. The furnace roof adopts a flat ceiling, and the high-temperature flue gas is fully burned in the adiabatic combustion settling chamber 5; one end of the adiabatic combustion settling chamber 6 is connected and fixed with an adiabatic flue 7; one side of the adiabatic flue 7 is connected and fixed with a waste heat boiler 8; The waste heat boiler 8 is a vertical steel pipe waste heat boiler, which is a bottom-inflow boiler, with an independent steel structure support, arranged outside the workshop, and adopts a natural circulation method. The economizer, the feed water pump and the deaerator constitute the whole steam water system; the deaerator 15 is connected to the inlet of the economizer 17 through the feed water pump 16; the outlet of the economizer 17 is connected to the inlet of the steam drum 18; the steam drum 18 Arranged on the top of the waste heat boiler 8, its saturated steam outlet is connected to the heat accumulator 21, and its saturated water outlet is connected to the inlet of the II-stage evaporator 20 and the inlet of the I-stage evaporator 19; the outlet of the II-stage evaporator 20 and the I-stage evaporator The outlet of device 19 is connected to steam drum 18 through riser pipe. The upper outlet of the waste heat boiler 8 is connected and fixed with a first connecting pipe 9; the end of one side of the first connecting pipe 9 is connected and fixed with a bag filter 10; the upper outlet of the bag filter 10 is connected and fixed with a second connection Pipeline 11; the end of one side of the second connecting pipe 11 is connected and fixed with an induced draft fan 12; the induced draft fan 12 is connected to a chimney 14 through a third connecting pipe 13.
本实用新型的工作原理是：高温烟气从电炉1炉顶第四孔2抽出，经四孔水冷弯头3、水冷滑套4、水冷烟道5进入到绝热燃烧沉降室6中，高温烟气在绝热燃烧沉降室6中充分燃烧，再通过绝热烟道7引出车间，与设置在车间外的余热锅炉8连接，在余热锅炉8中，烟气经过充分冷却，温度降至180℃以下，送入袋式除尘器10除尘，经除尘后的达标废气，通过引风机13及烟囱14排放。The working principle of the utility model is: the high-temperature flue gas is extracted from the fourth hole 2 of the furnace top of the electric furnace 1, enters the adiabatic combustion settling chamber 6 through the four-hole water-cooled elbow 3, the water-cooled sliding sleeve 4, and the water-cooled flue 5, and the high-temperature flue gas The gas is fully combusted in the adiabatic combustion settling chamber 6, and then led out of the workshop through the adiabatic flue 7 and connected to the waste heat boiler 8 installed outside the workshop. In the waste heat boiler 8, the flue gas is fully cooled and the temperature drops below 180°C. Send it to the bag filter 10 for dust removal, and the standard waste gas after dust removal is discharged through the induced draft fan 13 and the chimney 14.
上面对本专利的较佳实施方式作了详细说明，但是本专利并不限于上述实施方式，在本领域的普通技术人员所具备的知识范围内，还可以在不脱离本专利宗旨的前提下做出各种变化。The preferred implementation of this patent has been described in detail above, but this patent is not limited to the above-mentioned implementation, and within the knowledge of those of ordinary skill in the art, it can also be made without departing from the purpose of this patent. Variations.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032691A (en) * | 2020-07-31 | 2020-12-04 | 中冶南方都市环保工程技术股份有限公司 | Active coke carbonization high-temperature high-dust flue gas sectional type evaporation device and evaporation method |
| CN114111364A (en) * | 2021-12-22 | 2022-03-01 | 四川都钢钢铁集团股份有限公司 | Electric furnace smoke and dust removal system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032691A (en) * | 2020-07-31 | 2020-12-04 | 中冶南方都市环保工程技术股份有限公司 | Active coke carbonization high-temperature high-dust flue gas sectional type evaporation device and evaporation method |
| CN114111364A (en) * | 2021-12-22 | 2022-03-01 | 四川都钢钢铁集团股份有限公司 | Electric furnace smoke and dust removal system |
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