CN104313297A - Waste heat recycling method for cold-rolled strip annealing furnace - Google Patents
Waste heat recycling method for cold-rolled strip annealing furnace Download PDFInfo
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- CN104313297A CN104313297A CN201410626663.4A CN201410626663A CN104313297A CN 104313297 A CN104313297 A CN 104313297A CN 201410626663 A CN201410626663 A CN 201410626663A CN 104313297 A CN104313297 A CN 104313297A
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- 239000002918 waste heat Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000000137 annealing Methods 0.000 title claims abstract description 31
- 238000004064 recycling Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000005554 pickling Methods 0.000 claims abstract description 30
- 239000002253 acid Substances 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000009835 boiling Methods 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000010960 cold rolled steel Substances 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims 1
- 238000004321 preservation Methods 0.000 abstract description 4
- 238000005338 heat storage Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000032258 transport Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/663—Bell-type furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- 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
-
- 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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- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
本发明公开了一种冷轧钢带退火炉余热循环再利用方法，属于节能领域。它的特征是以水为吸热和放热介质的方式，在罩式退火炉加热和保温后，进入冷却阶段时，对退火炉进行余热回收再利用，为酸洗生产工序中需要通入热水进行升温提供热源；很好的将罩式退火炉在加热和保温后，用余热炉通入冷水来冷却罩式退火炉，并将用做冷却罩式退火炉产生的沸水或蒸汽用来加热酸洗生产工序中酸的升温，避免罩式退火炉在加热和保温后大量热能的消耗和加热酸洗工序中的酸的热能提供，极大地降低成本，余热得到有效的回收利用，节约能源。
The invention discloses a method for recycling waste heat of a cold-rolled steel strip annealing furnace, which belongs to the field of energy saving. It is characterized by using water as the heat-absorbing and exothermic medium. After the bell-type annealing furnace is heated and kept warm, when it enters the cooling stage, the waste heat of the annealing furnace is recovered and reused to provide heat for the pickling production process. Water is used to raise the temperature to provide a heat source; it is good to use the waste heat furnace to feed cold water into the bell annealing furnace after heating and keeping warm, and use the boiling water or steam generated by the cooling bell annealing furnace for heating The temperature rise of the acid in the pickling production process avoids the consumption of a large amount of heat energy in the bell annealing furnace after heating and heat preservation and the supply of heat energy for heating the acid in the pickling process, which greatly reduces the cost, effectively recycles waste heat and saves energy.
Description
技术领域 technical field
本发明属于节能领域，更具体地说，涉及一种冷轧钢带退火炉余热循环再利用方法。 The invention belongs to the field of energy saving, and more specifically relates to a recycling method for waste heat of a cold-rolled steel strip annealing furnace.
背景技术 Background technique
罩式退火炉炉在加热和保温（650℃）后，进入冷却阶段，采用水喷淋冷却，喷淋冷却水（70℃）需经冷却塔冷却后，再循环使用，造成热能白白浪费和流失。同时酸洗生产工序中需要通入热水进行升温，消耗大量热能，造成成本增大。 The bell annealing furnace enters the cooling stage after heating and heat preservation (650°C), using water spray cooling, and the spray cooling water (70°C) needs to be cooled by the cooling tower before being recycled, resulting in waste and loss of heat energy . At the same time, in the pickling production process, hot water needs to be introduced to raise the temperature, which consumes a large amount of heat energy and increases the cost.
发明内容 Contents of the invention
、要解决的问题, the problem to be solved
针对现有技术中存在的上述问题，本发明提供一种冷轧钢带退火炉余热循环再利用方法，能将罩式退火炉在加热和保温（650℃）后，用余热炉通入冷水来冷却罩式退火炉，并将用做冷却罩式退火炉产生的100℃沸水或蒸汽用来加热酸洗生产工序中酸的升温，避免大量热能的消耗。 Aiming at the above-mentioned problems existing in the prior art, the present invention provides a recycling method for the waste heat of the cold-rolled steel strip annealing furnace. After the bell-type annealing furnace is heated and kept warm (650°C), the waste heat furnace is fed with cold water. Cool the bell annealing furnace, and use the 100°C boiling water or steam generated by the cooling bell annealing furnace to heat the acid in the pickling production process to avoid a large amount of heat energy consumption.
、技术方案 ,Technical solutions
为了解决上述问题，本发明所采用的技术方案如下： In order to solve the above problems, the technical scheme adopted in the present invention is as follows:
一种冷轧钢带退火炉余热循环再利用方法，其特征是以水为吸热和放热介质的方式，在罩式退火炉加热和保温（650℃）后，进入冷却阶段时，对退火炉进行余热回收再利用，为酸洗生产工序中需要通入热水进行升温提供热源； A cold-rolled steel strip annealing furnace waste heat recycling method, which is characterized in that water is used as the heat-absorbing and exothermic medium. After the bell-type annealing furnace is heated and kept warm (650 ° C), when it enters the cooling stage, the annealing The stove is used for waste heat recovery and reuse, which provides heat source for the hot water needed to be fed into the pickling production process to raise the temperature;
该方法具体采用以下步骤： The method specifically adopts the following steps:
第一步：收集罩式炉热能：在冷却阶段，在去除罩式炉加热罩后，对内罩套上余热罩， 并向余热罩通入冷水，吸收罩式炉的放热，将常温下的冷水转换成100℃沸水或蒸汽，实现辐射热的转换过程 ； Step 1: Collect the heat energy of the bell-type furnace: In the cooling stage, after removing the heating mantle of the bell-type furnace, put the waste heat cover on the inner cover, and pass cold water into the waste heat cover to absorb the exothermic heat of the bell-type furnace, and convert the The cold water is converted into boiling water or steam at 100°C to realize the conversion process of radiant heat;
第二步：热能输送：在酸洗工序设立蓄热水箱，将余热罩回收的热能通过保温管路输送至蓄热水箱； The second step: heat energy delivery: set up a hot water storage tank in the pickling process, and transport the heat recovered by the waste heat cover to the hot water storage tank through the insulation pipeline;
第三步：二次利用：输送的热能通过酸洗工序PP热交换器，将酸加温至85℃，同时水冷却至75℃，实现二次利用转换； Step 3: Secondary utilization: The heat energy delivered passes through the PP heat exchanger in the pickling process, heating the acid to 85°C, and cooling the water to 75°C at the same time, realizing the transformation of secondary utilization;
第四步：75℃的水再通过输送管道进入余热罩，再吸收罩式炉放热； Step 4: Water at 75°C enters the waste heat hood through the conveying pipeline, and then absorbs the heat released by the bell-type furnace;
经过上述周而复始的循环利用步骤，实现对罩式退火炉加热和保温（650℃）后，进入冷却阶段时的余热进行回收再利用到酸洗生产工序中为酸加温而需通入的热水进行升温提供热源。 After the above-mentioned repeated recycling steps, after the bell annealing furnace is heated and kept warm (650°C), the waste heat when it enters the cooling stage is recovered and reused to the hot water that needs to be fed in for acid heating in the pickling production process Provide a heat source for heating.
进一步地，所述余热罩由其下端通入冷水或是经加热酸后回流的水，所述余热罩经加热后的100℃沸水或蒸汽由其顶端输出。 Further, the waste heat hood is fed with cold water or water returned after heating the acid from its lower end, and the heated 100°C boiling water or steam is output from the top of the waste heat hood.
更进一步地，该方法形成两个液流循环，一个是由余热罩加热后的100℃沸水或蒸汽由其顶端输出经保温管路输送至蓄热水箱，再由蓄热水箱将输送的热能通过酸洗工序PP热交换器，将酸加温至85℃后，同时水冷却成75℃的低温水，再通过输送管道进入余热罩，再吸收罩式炉放热，如此往复形成水的循环；另一个是未加热的酸通入到酸洗工序PP热交换器中，待被加热至85℃后，再输送至酸洗槽进行酸洗，如此往复形成酸液循环。 Furthermore, this method forms two liquid flow cycles, one is the 100°C boiling water or steam heated by the waste heat hood, which is output from its top and delivered to the heat storage tank through the heat preservation pipeline, and then the heat storage tank transports the liquid to the heat storage tank. Heat energy passes through the PP heat exchanger in the pickling process, heats the acid to 85°C, and at the same time cools the water into low-temperature water at 75°C, then enters the waste heat hood through the conveying pipeline, and absorbs the heat released by the bell furnace, thus reciprocating to form water Circulation; the other is that the unheated acid is passed into the PP heat exchanger in the pickling process, and after being heated to 85°C, it is then transported to the pickling tank for pickling, and the acid solution cycle is formed in this way.
、有益效果, Beneficial effect
相比于现有技术，本发明的有益效果为： Compared with the prior art, the beneficial effects of the present invention are:
本发明很好的将罩式退火炉在加热和保温（650℃）后，用余热炉通入冷水来冷却罩式退火炉，并将用做冷却罩式退火炉产生的100℃沸水或蒸汽用来加热酸洗生产工序中酸的升温，避免罩式退火炉在加热和保温（650℃）后大量热能的消耗和加热酸洗工序中的酸的热能提供，极大地降低成本，余热得到有效的回收利用，节约能源。 In the present invention, after the bell annealing furnace is heated and kept warm (650°C), the waste heat furnace is used to feed cold water into the bell annealing furnace to cool the bell annealing furnace, and it will be used for cooling the 100°C boiling water or steam produced by the bell annealing furnace. To heat the temperature of the acid in the pickling production process, avoid the consumption of a large amount of heat energy in the bell annealing furnace after heating and holding (650°C) and the supply of heat energy for the acid in the pickling process, greatly reduce the cost, and effectively use the waste heat Recycle and save energy.
附图说明 Description of drawings
图1为本发明的结构示意图。 Fig. 1 is a structural schematic diagram of the present invention. the
具体实施方式 Detailed ways
下面结合具体实施例对本发明进一步进行描述。 The present invention will be further described below in conjunction with specific embodiments.
如图1所示，一种冷轧钢带退火炉余热循环再利用方法，其特征是以水为吸热和放热介质的方式，在罩式退火炉加热和保温（650℃）后，进入冷却阶段时，对退火炉进行余热回收再利用，为酸洗生产工序中需要通入热水进行升温提供热源； As shown in Figure 1, a cold-rolled strip annealing furnace waste heat recycling method is characterized in that water is used as the heat-absorbing and exothermic medium. During the cooling stage, the waste heat of the annealing furnace is recovered and reused to provide a heat source for the hot water needed to be introduced in the pickling production process to raise the temperature;
该方法具体采用以下步骤： The method specifically adopts the following steps:
第一步：收集罩式炉热能：在冷却阶段，在去除罩式炉加热罩后，对内罩套上余热罩， 并向余热罩通入冷水，吸收罩式炉的放热，将常温下的冷水转换成100℃沸水或蒸汽，实现辐射热的转换过程 ； Step 1: Collect the heat energy of the bell-type furnace: In the cooling stage, after removing the heating mantle of the bell-type furnace, put the waste heat cover on the inner cover, and pass cold water into the waste heat cover to absorb the exothermic heat of the bell-type furnace, and convert the The cold water is converted into boiling water or steam at 100°C to realize the conversion process of radiant heat;
第二步：热能输送：在酸洗工序设立蓄热水箱，将余热罩回收的热能通过保温管路输送至蓄热水箱； The second step: heat energy delivery: set up a hot water storage tank in the pickling process, and transport the heat recovered by the waste heat cover to the hot water storage tank through the insulation pipeline;
第三步：二次利用：输送的热能通过酸洗工序PP热交换器，将酸加温至85℃，同时水冷却至75℃，实现二次利用转换； Step 3: Secondary utilization: The heat energy delivered passes through the PP heat exchanger in the pickling process, heating the acid to 85°C, and cooling the water to 75°C at the same time, realizing the transformation of secondary utilization;
第四步：75℃的水再通过输送管道进入余热罩，再吸收罩式炉放热； Step 4: Water at 75°C enters the waste heat hood through the conveying pipeline, and then absorbs the heat released by the bell-type furnace;
经过上述周而复始的循环利用步骤，实现对罩式退火炉加热和保温（650℃）后，进入冷却阶段时的余热进行回收再利用到酸洗生产工序中为酸加温而需通入的热水进行升温提供热源。 After the above-mentioned repeated recycling steps, after the bell annealing furnace is heated and kept warm (650°C), the waste heat when it enters the cooling stage is recovered and reused to the hot water that needs to be fed in for acid heating in the pickling production process Provide a heat source for heating.
另外，所述余热罩由其下端通入冷水或是经加热酸后回流的水，所述余热罩经加热后的100℃沸水或蒸汽由其顶端输出，因为温度高的气体和液体，符合热胀冷缩原理，温度高的体积就相对增大，密度变小，会浮到上面，故所述余热罩中上段水的温度较高，下段水温度较低。且该方法形成两个液流循环，一个是由余热罩加热后的100℃沸水或蒸汽由其顶端输出经保温管路输送至蓄热水箱，再由蓄热水箱将输送的热能通过酸洗工序PP热交换器，将酸加温至85℃后，同时水冷却成75℃的低温水，再通过输送管道进入余热罩，再吸收罩式炉放热，如此往复形成水的循环；另一个是未加热的酸通入到酸洗工序PP热交换器中，待被加热至85℃后，再输送至酸洗槽进行酸洗，如此往复形成酸液循环。 In addition, the waste heat hood is fed with cold water or water returned after heating the acid from its lower end, and the heated 100°C boiling water or steam is output from the top of the waste heat hood, because high-temperature gas and liquid are in line with heat According to the principle of expansion and contraction, the volume of the high temperature will increase relatively, the density will become smaller, and it will float to the top, so the temperature of the upper water in the waste heat cover is higher, and the temperature of the lower water is lower. And this method forms two liquid flow cycles, one is the 100°C boiling water or steam heated by the waste heat hood, which is output from the top of the heat preservation pipeline to the heat storage tank, and then the heat energy transported by the heat storage tank passes through the acid In the washing process, the PP heat exchanger heats the acid to 85°C, and at the same time cools the water to 75°C low-temperature water, and then enters the waste heat hood through the conveying pipeline, and then absorbs the heat released by the bell furnace, thus forming a water cycle; One is that the unheated acid is passed into the PP heat exchanger in the pickling process, and after being heated to 85°C, it is then transported to the pickling tank for pickling, so that the acid liquid cycle is formed in this way.
以上示意性的对本发明及其实施方式进行了描述，该描述没有限制性，附图中所示的也只是本发明的实施方式之一，实际的结构并不局限于此。所以，如果本领域的普通技术人员受其启示，在不脱离本发明创造宗旨的情况下，不经创造性的设计出与该技术方案相似的结构方式及实施例，均应属于本发明的保护范围。 The above schematically describes the present invention and its implementation, which is not restrictive, and what is shown in the drawings is only one of the implementations of the present invention, and the actual structure is not limited thereto. Therefore, if a person of ordinary skill in the art is inspired by it, without departing from the inventive concept of the present invention, without creatively designing a structural mode and embodiment similar to the technical solution, it shall all belong to the protection scope of the present invention .
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| CN104949517A (en) * | 2015-06-19 | 2015-09-30 | 邯钢集团邯宝钢铁有限公司 | Rapid cooling method for steel rolling heating furnace heat exchanger |
| CN109023545A (en) * | 2018-07-04 | 2018-12-18 | 安徽万利达羽绒制品有限公司 | A kind of heat absorption reuse means cooling for Eider down processing |
| CN109136490A (en) * | 2018-09-27 | 2019-01-04 | 浙江华赢特钢科技有限公司 | A kind of orientation silicon steel environmental protection process equipment and environmental protection processing method |
| CN111298602A (en) * | 2020-02-25 | 2020-06-19 | 新冶高科技集团有限公司 | Pickling acid regeneration combined energy-saving emission-reducing waste heat utilization system and method |
| CN112229228A (en) * | 2020-09-24 | 2021-01-15 | 东北大学 | A multi-stage secondary phase transformation recovery and storage device for continuous casting and billet cooling process heat |
| CN113801989A (en) * | 2021-09-18 | 2021-12-17 | 祝桥金属材料启东有限公司 | A method and device for collecting heat energy of bell annealing for cold-rolled steel strip production |
| CN114739169A (en) * | 2022-05-17 | 2022-07-12 | 湖南华菱涟钢特种新材料有限公司 | Method and system for utilizing waste heat of cooling water of bell-type furnace |
| CN115060082A (en) * | 2022-06-07 | 2022-09-16 | 湖南华菱涟钢特种新材料有限公司 | A device for utilizing low-temperature waste heat of a bell-type furnace and a method for using the same |
| CN116793098A (en) * | 2023-08-29 | 2023-09-22 | 山西华茂智能新材料有限公司 | A waste heat recovery and utilization method in the slow cooling section of the ductile cast pipe annealing process |
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| CN104949517A (en) * | 2015-06-19 | 2015-09-30 | 邯钢集团邯宝钢铁有限公司 | Rapid cooling method for steel rolling heating furnace heat exchanger |
| CN109023545A (en) * | 2018-07-04 | 2018-12-18 | 安徽万利达羽绒制品有限公司 | A kind of heat absorption reuse means cooling for Eider down processing |
| CN109136490A (en) * | 2018-09-27 | 2019-01-04 | 浙江华赢特钢科技有限公司 | A kind of orientation silicon steel environmental protection process equipment and environmental protection processing method |
| CN111298602A (en) * | 2020-02-25 | 2020-06-19 | 新冶高科技集团有限公司 | Pickling acid regeneration combined energy-saving emission-reducing waste heat utilization system and method |
| CN111298602B (en) * | 2020-02-25 | 2022-08-12 | 新冶高科技集团有限公司 | A system and method for waste heat utilization of pickling and acid regeneration combined with energy saving and emission reduction |
| CN112229228A (en) * | 2020-09-24 | 2021-01-15 | 东北大学 | A multi-stage secondary phase transformation recovery and storage device for continuous casting and billet cooling process heat |
| CN113801989A (en) * | 2021-09-18 | 2021-12-17 | 祝桥金属材料启东有限公司 | A method and device for collecting heat energy of bell annealing for cold-rolled steel strip production |
| CN114739169A (en) * | 2022-05-17 | 2022-07-12 | 湖南华菱涟钢特种新材料有限公司 | Method and system for utilizing waste heat of cooling water of bell-type furnace |
| CN115060082A (en) * | 2022-06-07 | 2022-09-16 | 湖南华菱涟钢特种新材料有限公司 | A device for utilizing low-temperature waste heat of a bell-type furnace and a method for using the same |
| CN116793098A (en) * | 2023-08-29 | 2023-09-22 | 山西华茂智能新材料有限公司 | A waste heat recovery and utilization method in the slow cooling section of the ductile cast pipe annealing process |
| CN116793098B (en) * | 2023-08-29 | 2023-10-20 | 山西华茂智能新材料有限公司 | Waste heat recycling method for annealing process slow cooling section of spheroidal graphite cast tube |
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Address after: North Industrial Park, 241007 Anhui city of Wuhu province Jiujiang Town Bridge Applicant after: ANHUI CHUJIANG SPECIAL STEEL CO., LTD. Address before: North Industrial Park, 241007 Anhui city of Wuhu province Jiujiang Town Bridge Applicant before: Wuhu Shuangyuan Pipe Industry Co., Ltd. |
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Application publication date: 20150128 |