WO2014172898A1 - 节能型辊底连续式光亮正退火炉 - Google Patents

节能型辊底连续式光亮正退火炉 Download PDF

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Publication number
WO2014172898A1
WO2014172898A1 PCT/CN2013/074815 CN2013074815W WO2014172898A1 WO 2014172898 A1 WO2014172898 A1 WO 2014172898A1 CN 2013074815 W CN2013074815 W CN 2013074815W WO 2014172898 A1 WO2014172898 A1 WO 2014172898A1
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Prior art keywords
pipe
heat recovery
waste heat
drum
heat exchange
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PCT/CN2013/074815
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English (en)
French (fr)
Inventor
丁永健
丁帅
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衡阳市丁点儿工业炉节能有限公司
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Priority to PCT/CN2013/074815 priority Critical patent/WO2014172898A1/zh
Publication of WO2014172898A1 publication Critical patent/WO2014172898A1/zh

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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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • 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
    • C21D1/28—Normalising
    • 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
    • C21D9/0056—Furnaces through which the charge is moved in a horizontal straight path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
    • F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • 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
    • F27D17/004—Systems for reclaiming waste heat
    • F27D2017/006—Systems for reclaiming waste heat using a boiler

Definitions

  • This invention relates to a heat treatment furnace, and more particularly to an energy-saving roll bottom continuous bright annealing furnace.
  • the structure of the continuous roller annealing furnace used in the production process is as shown in Figs. 1 and 2, which comprises a heating chamber 1, a heat insulating chamber 2 and a furnace roller 3, and is heated.
  • the chamber 1 is connected to the heat preservation chamber 2, and the furnace roller 3 is installed in the heating chamber 1 and the heat preservation chamber 2 through a bearing housing 31 outside the furnace wall 32.
  • the furnace wall 32 is a furnace top 33, and the lower surface is a furnace bottom 34.
  • the steel pipe, steel plate and strip steel are in the roller-type continuous annealing furnace.
  • the furnace is directly cooled in the air, and the high temperature flue gas in the heating chamber 1 and the heat preservation chamber 2 is exhausted. Directly discharged through the flue 4.
  • the disadvantage is that the temperature of the steel pipe, steel plate and strip steel is as high as 800 °C when it is directly discharged after annealing or normalizing, which causes a large amount of high-temperature heat energy to be released into the atmosphere, which causes the working environment of the annealing workers to be poor;
  • oxidizing gases such as oxygen and water vapor
  • a thick layer of secondary iron oxide is formed on the surface, which affects the pickling speed of steel pipes, steel plates and strip steels, and increases the consumption of sulfuric acid during pickling;
  • the secondary iron oxide scale is thicker, which not only causes the loss of steel, but also reduces the outer surface quality of steel pipes, steel plates and strip steels.
  • this invention The purpose is to overcome the above-mentioned deficiencies of the prior art, and to provide an energy-saving roller bottom continuous bright annealing furnace for recovering high temperature heat energy and high temperature flue gas heat energy after annealing of steel pipes, steel plates and strip steels into steam Instead of producing steam boilers in the enterprise, it will save energy for the country, reduce environmental pollution, improve workers' working conditions, reduce the production costs of enterprises, and improve the economic benefits of enterprises.
  • an energy-saving roller bottom continuous bright annealing furnace comprising a heating chamber, a heat preservation chamber, a furnace roller, a flue and a waste heat recovery section, and the heating chamber, the heat preservation chamber and the waste heat recovery section are sequentially connected, and the furnace roller passes
  • the bearing housing outside the furnace wall is installed in the heating chamber, the heat preservation chamber and the waste heat recovery section, and the furnace wall surface of the waste heat recovery section is a waste heat recovery boiler, and a flue is arranged at the tail end of the heat preservation chamber or the inlet end of the heating chamber.
  • the waste heat recovery boiler includes a drum, a heat exchange tube, a down pipe and a header pipe.
  • the drum has an inlet pipe, a water level gauge pipe and an inspection manhole, and the bottom has a sewage pipe, and the upper part of the heat exchange pipe and the down pipe is connected with the drum.
  • the lower part is respectively connected with the left and right header pipes, and the bottom of the left and right collecting box pipes has a collecting tank sewage pipe, the outside of the drum and the heat exchange pipe has a heat insulating layer, and the outer circumference of the down pipe and the collecting box pipe has an insulating layer.
  • the technical solution can also be: an energy-saving roller bottom continuous bright annealing furnace, comprising a heating chamber, a heat preservation chamber, a furnace roller, a flue and a waste heat recovery section, and the heating chamber, the heat preservation chamber and the waste heat recovery section are sequentially connected, the furnace The roller is installed in the heating chamber, the heat preservation chamber and the waste heat recovery section through the bearing seat outside the furnace wall, the waste heat recovery section of the furnace wall surface is a waste heat recovery boiler, and the waste heat recovery boiler has a flue at the end of the waste heat recovery boiler, and the waste heat recovery boiler has smoke tube.
  • the waste heat recovery boiler includes a tobacco pipe, a drum, a heat exchange pipe, a down pipe and a header pipe.
  • the pipe is located in the drum.
  • the drum has an inlet pipe, a water level gauge pipe and an inspection manhole, and a sewage pipe at the bottom, heat exchange.
  • the upper part of the pipe and the down pipe is connected with the drum, the lower part is respectively connected with the left and right header pipes, and the bottom of the left and right header pipes has a header sewage pipe, and the outer side of the drum and the heat exchange pipe has an insulation layer, a down pipe and a header pipe. There is insulation on the outside.
  • the descending pipe is divided into two rows in front and rear.
  • the front row and the rear row have two left and right down pipes, and the lower part of the left and right down pipes are respectively connected with the left and right header pipes, and the upper part is connected with the drum.
  • the heat exchange tubes are divided into several rows from front to back, and there are six rows in each row.
  • the lower part of the three heat exchange tubes is connected to the left header tube, the lower part of the other three heat exchange tubes is connected to the right header tube, and the upper portions of the six heat exchange tubes are Connected to the drum.
  • the heat exchange tube is L-shaped in shape so as to absorb residual heat as close as possible to the heat source.
  • the left and right header pipes of the waste heat recovery boiler are located on the furnace wall of the waste heat recovery section.
  • the waste heat recovery boiler can exchange the heat energy of the high temperature flue gas and the radiant heat energy of the steel pipe, the steel plate and the strip steel at the same time.
  • the discharge temperature of products such as steel pipes, steel plates and strip steel can be controlled at about 250 °C.
  • Most of the high-temperature flue gas heat energy is recycled, so that most of the energy consumption of the annealing furnace is recovered as steam for steel pipes.
  • the steam and domestic steam for the production of steel plates and strip steels improve the heat recovery rate of the furnace.
  • the temperature of the steel tubes, steel plates and strips is reduced, and the secondary oxidation loss is also reduced, and the product is improved.
  • the quality of the outer surface is produced by the furnace.
  • the invention is applicable not only to a positive annealing furnace for producing steel pipes, steel sheets and strip steels, but also to a furnace for firing various ceramic products.
  • FIG. 1 is a schematic structural view of a conventional roller bottom continuous annealing furnace
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
  • FIG. 3 is a schematic structural view of Embodiment 1 of the present invention.
  • Figure 4 is a cross-sectional view taken along line B-B of Figure 3;
  • Figure 5 is a schematic structural view of Embodiment 2 of the present invention.
  • Figure 6 is a schematic structural view of Embodiment 3 of the present invention.
  • Figure 7 is a schematic view showing the structure of a waste heat recovery boiler having a pipe
  • Figure 8 is a right side view of Figure 7;
  • Figure 9 is a schematic view showing the structure of a waste heat recovery boiler of a smokeless pipe of the present invention.
  • Figure 10 is a right side view of Figure 9.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • An energy-saving roller bottom continuous bright annealing furnace comprises a heating chamber 1, a heat preservation chamber 2, a furnace roller 3, a flue 4 and a waste heat recovery section 5, and the heating chamber 1, the heat preservation chamber 2 and the waste heat recovery section 5 are sequentially connected.
  • the furnace roller 3 is installed in the heating chamber 1, the heat preservation chamber 2 and the waste heat recovery section 5 through the bearing housing 31 outside the furnace wall 32.
  • the furnace wall 32 of the waste heat recovery section 5 is a waste heat recovery boiler 6, and the bottom is a furnace bottom 34.
  • the steel pipe is heated in the continuous heating furnace of the roller bottom type, after being heated by the high temperature in the heating chamber 1 and kept warmed by the heat preservation chamber 2, and then passed through the waste heat recovery boiler on the waste heat recovery section 5 for more than 6 heat utilization (the discharge temperature can be controlled at about 250 ° C) Cooling in the air; the high temperature flue gas in the heating chamber 1 and the holding chamber 2 is discharged through the flue 4 at the end of the holding chamber 2.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • An energy-saving roller bottom continuous bright annealing furnace comprises a heating chamber 1, a heat preservation chamber 2, a furnace roller 3, a flue 4 and a waste heat recovery section 5, and the heating chamber 1, the heat preservation chamber 2 and the waste heat recovery section 5 are sequentially connected.
  • the furnace roller 3 is installed in the heating chamber 1, the heat preservation chamber 2 and the waste heat recovery section 5 through the bearing housing 31 outside the furnace wall 32.
  • the furnace wall 32 of the waste heat recovery section 5 is a waste heat recovery boiler 6, and the bottom is a furnace bottom 34.
  • the waste heat recovery boiler 6 has a flue 4 at the end, and a waste pipe in the waste heat recovery boiler 6.
  • the steel pipe is heated in the continuous heating furnace of the roller bottom type, after being heated by the high temperature in the heating chamber 1 and kept warmed by the heat preservation chamber 2, and then passed through the waste heat recovery boiler on the waste heat recovery section 5 for more than 6 heat utilization (the discharge temperature can be controlled at about 250 ° C)
  • the high-temperature flue gas in the heating chamber 1 and the heat-insulating chamber 2 passes through the flue pipe in the waste heat recovery boiler 6, and is exhausted by the waste heat and then discharged through the flue 4 at the end of the waste heat recovery boiler 6.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • An energy-saving roller bottom continuous bright annealing furnace comprises a heating chamber 1, a heat preservation chamber 2, a furnace roller 3, a flue 4 and a waste heat recovery section 5, and the heating chamber 1, the heat preservation chamber 2 and the waste heat recovery section 5 are sequentially connected.
  • the furnace roller 3 is installed in the heating chamber 1, the heat preservation chamber 2 and the waste heat recovery section 5 through the bearing housing 31 outside the furnace wall 32.
  • the furnace wall 32 of the waste heat recovery section 5 is a waste heat recovery boiler 6, and the bottom is a furnace bottom 34.
  • the inlet end of the heating chamber 1 has a flue 4.
  • the steel pipe is heated in the continuous heating furnace of the roller bottom type, after being heated by the high temperature in the heating chamber 1 and kept warmed by the heat preservation chamber 2, and then passed through the waste heat recovery boiler on the waste heat recovery section 5 for more than 6 heat utilization (the discharge temperature can be controlled at about 250 ° C) Cooling in the air; the high temperature flue gas in the heating chamber 1 and the holding chamber 2 is discharged through the flue 4 at the inlet end of the heating chamber 1.
  • the waste heat recovery boiler 6 includes a smoke pipe 61, a drum 62, a heat exchange pipe 63, a down pipe 64, and a header pipe 65.
  • the pipe 61 is located in the drum 62.
  • the drum 62 has an inlet pipe 611, a water level gauge pipe 612, and
  • the manhole 613 has a drain pipe 614 at the bottom, and the heat exchange pipe 63 has an L shape so as to be as close as possible to the steel pipe.
  • the heat exchange pipe 63 is divided into several rows from front to back, and each row has six, and three heat exchange pipes 63.
  • the lower part is connected to the left header tube 65, the lower part of the other three heat exchange tubes 63 is connected to the right header tube 65, and the upper portions of the six heat exchange tubes 63 are connected to the drum 62;
  • the lowering tube 64 is divided into two rows of four in front and rear.
  • the bottom of the left and right header pipes 65 has a header drain pipe 651.
  • the outer side of the drum 62 and the heat exchange tube 63 has a heat insulating layer 66, and the outer circumference of the down tube 64 and the header tube 65 has an insulating layer 66; the left and right header tubes 65 of the waste heat recovery boiler 6 are located in the furnace of the waste heat recovery section 5. On the wall 32.
  • the high-temperature flue gas in the heating chamber 1 and the heat-insulating chamber 2 passes through the tobacco pipe 61 in the waste heat recovery boiler 6, and is exhausted by the waste heat and then discharged through the flue 4 at the end of the waste heat recovery boiler 6; at the same time, from the heat preservation chamber 2
  • the heat of the steel pipe having a temperature of up to about 800 ° C is absorbed by the drum 62 and the heat exchange pipe 63 of the waste heat recovery boiler 6 and is discharged (the discharge temperature can be controlled at about 250 ° C), and the drum 62
  • the water in the tank flows into the header pipe 65 through the downcomer pipe 64.
  • the water in the header pipe 65 is heated and heated in the heat exchange pipe 63, and then flows back into the drum 62, so that heat is exchanged to continuously generate steam.
  • the waste heat recovery boiler 6 includes a drum 62, a heat exchange tube 63, a down pipe 64 and a header pipe 65.
  • the drum 62 has an inlet pipe 611, a water level gauge pipe 612 and an inspection person hole 613, and a sewage pipe 614 at the bottom, heat exchange.
  • the shape of the tube 63 is L-shaped so as to be as close as possible to the steel pipe, and the heat exchange tubes 63 are divided into rows from front to back, six in each row, wherein the lower portions of the three heat exchange tubes 63 are connected to the left header tank 65, and the other three are hot.
  • the lower portion of the exchange tube 63 is connected to the right header tube 65, and the upper portions of the six heat exchange tubes 63 are connected to the drum 62; the descending tube 64 is divided into four rows in front and rear, and the front and rear rows have two down tubes on the left and the right. 64.
  • the lower part of the left and right downcomers 64 are respectively connected to the left and right header pipes 65, and the upper part is connected with the drum 62; the bottom of the left and right header pipes 65 has a header sewage pipe 651, and the outer sides of the drum 62 and the heat exchange pipe 63 are insulated.
  • the outer layer of the layer 66, the down tube 64 and the header tube 65 has a heat insulating layer 66; the left and right header tubes 65 of the waste heat recovery boiler 6 are seated on the furnace wall 32 of the waste heat recovery section 5.
  • the heat of the steel pipe having a temperature of about 800 ° C is absorbed by the drum 62 and the heat exchange pipe 63 of the waste heat recovery boiler 6 and is discharged (the discharge temperature can be controlled at 250 ° C).
  • the water in the drum 62 flows into the header pipe 65 through the downcomer 64, and the water in the header pipe 65 is heated and heated in the heat exchange pipe 63, and then flows back into the drum 62, thus circulating heat.
  • Exchange continuously generate steam for the pickling process in the cold drawn steel pipe production process, without the need to generate steam through a coal-fired (gas) boiler, saving a lot of energy.

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  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
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Abstract

一种节能型辊底连续式光亮正退火炉，包括加热室（1）、保温室（2）、炉辊（3）、烟道（4）和余热回收段（5），加热室（1）、保温室（2）和余热回收段（5）依次相连，炉辊（3）通过炉墙（32）外的轴承座（31）安装在加热室（1）、保温室（2）和余热回收段（5）内，余热回收段（5）的炉墙（32）上面为余热回收锅炉（6）。余热回收锅炉能将高温烟气热能和产品的辐射热能回收产生蒸汽，同时，产品出炉温度的降低也可以减少二次氧化烧损，提高了产品的外表面质量。

Description

节能型辊底连续式光亮正退火炉 技术领域
本 发明 涉及一种热处理炉，特别是一种节能型辊底连续式光亮正退火炉。
背景技术
现有钢管、钢板以及带钢等产品，在生产过程中使用的辊底连续式正退火炉的结构如附图1、2所示，它包括加热室1、保温室2和炉辊3，加热室1和保温室2相连，炉辊3通过炉墙32外的轴承座31安装在加热室1和保温室2内，炉墙32上面为炉顶33，下面为炉底34，在保温室2的尾端有烟道4。钢管、钢板以及带钢等产品在辊底式连续退火炉中，经过加热室1高温快速加热和保温室2保温后，直接出炉在空气中冷却，加热室1和保温室2中的高温烟气直接经烟道4排出。其不足之处是：钢管、钢板以及带钢等产品在退火或正火后直接出炉时的温度高达800℃左右，导致大量的高温热能释放在大气中，造成正退火工人劳动环境差；同时，钢管、钢板以及带钢等产品在正退火800℃左右出炉空冷时，其表面层中的铁将会和空气中的氧化性气体（例如氧气、水蒸气）进行化学反应而产生二次氧化，钢管、钢板以及带钢等产品二次氧化后，其表面生成一层较厚的二次氧化铁皮，影响了钢管、钢板以及带钢等产品的酸洗速度，增加了酸洗时硫酸的消耗；如果成品钢管、钢板以及带钢等产品退火时二次氧化铁皮较厚，就不仅会造成钢的损耗，而且还会降低钢管、钢板以及带钢等产品的外表面质量。
此外，现有技术中的退火炉高温烟气绝大部分是采用空气换热器进行余热利用的，而空气换热器换热效果差，而只能将750℃左右的高温烟气降至500℃左右，其烟气中仍有大量的热能没有得到充分利用，而钢管、钢板以及带钢等产品在生产过程中又需要蒸气加热，要通过燃煤（气）锅炉产生蒸气，需要消耗大量的能源，这既不利于企业降低生产成本又浪费了国家能源资源，也造成环境污染，恶化工人劳动条件。
发明内容
本 发明 的目的是克服现有技术的上述不足，而提供一种节能型辊底连续式光亮正退火炉，以便将钢管、钢板以及带钢等产品退火后的高温热能和高温烟气热能回收产生为蒸气，代替企业内生产蒸气锅炉，从而为国家节约能源，减少环境污染，改善工人劳动条件，降低企业的生产成本，提高企业的经济效益。
本 发明 的技术方案是：一种节能型辊底连续式光亮正退火炉，包括加热室、保温室、炉辊、烟道和余热回收段，加热室、保温室和余热回收段依次相连，炉辊通过炉墙外的轴承座安装在加热室、保温室和余热回收段内，余热回收段的炉墙上面为余热回收锅炉，在保温室的尾端或加热室的进口端有烟道。
余热回收锅炉包括锅筒、热交换管、下降管和集箱管，锅筒上有进水管、水位计管和检修人孔，底部有排污管，热交换管和下降管的上部与锅筒连接，下部分别与左右集箱管连接，左右集箱管底部有集箱排污管，锅筒和热交换管的外侧有保温层，下降管和集箱管的外周有保温层。
本 发明 的技术方案也可以是：一种节能型辊底连续式光亮正退火炉，包括加热室、保温室、炉辊、烟道和余热回收段，加热室、保温室和余热回收段依次相连，炉辊通过炉墙外的轴承座安装在加热室、保温室和余热回收段内，余热回收段的炉墙上面为余热回收锅炉，在余热回收锅炉的尾端有烟道，余热回收锅炉内有烟管。
余热回收锅炉包括烟管、锅筒、热交换管、下降管和集箱管，烟管位于锅筒内，锅筒上有进水管、水位计管和检修人孔，底部有排污管，热交换管和下降管的上部与锅筒连接，下部分别与左右集箱管连接，左右集箱管底部有集箱排污管，锅筒和热交换管的外侧有保温层，下降管和集箱管的外周有保温层。
下降管分前后两排共四根，前排和后排各有左右两根下降管，左右下降管的下部分别与左右集箱管连接，上部均与锅筒连接。
热交换管从前到后分成若干排，每排共六根，其中三根热交换管的下部与左集箱管连接，另外三根热交换管的下部与右集箱管连接，六根热交换管的上部均与锅筒连接。
热交换管形状为L形，以便尽可能的靠近热源吸收余热。
余热回收锅炉的左右两根集箱管座落在余热回收段的炉墙上。
本 发明 由于在正退火炉尾增加了余热回收段，并在余热回收段上设置了余热回收锅炉，余热回收锅炉能将高温烟气热能和钢管、钢板以及带钢等产品的辐射热能二种热能同时交换产生为蒸气，使钢管、钢板以及带钢等产品的出炉温度可以控制在250℃左右，高温烟气热能大部分回收利用，使正退火炉的能耗热能大部分回收产生为蒸汽，供钢管、钢板以及带钢等产品的生产用蒸汽和生活用蒸汽，提高了炉子的热回收率；同时，钢管、钢板以及带钢等产品出炉温度的降低，也减少了二次氧化烧损，提高了产品的外表面质量。
本 发明 不仅适用于生产钢管、钢板以及带钢等产品的的正退火炉，还适用于烧制各种陶瓷产品的窑炉。
下面以生产钢管为例，结合图和具体实施方式对本发明的详细内容作进一步描述。
附图说明
图1为现有 辊底连续式正退火炉 的结构示意图；
图2为图1的A-A剖视图；
图3为本发明 实施例一 的结构示意图；
图4为图3的B-B剖视图；
图5为本发明 实施例二 的结构示意图；
图6为本发明 实施例三 的结构示意图；
图7为本发明有烟管的 余热回收锅炉 的结构示意图；
图8为图7的右视图；
图9为本发明无烟管的 余热回收锅炉 的结构示意图；
图10为图9的右视图。
具体实施方式
实施例一：
如图3、4所示： 一种节能型辊底连续式光亮正退火炉，包括加热室1、保温室2、炉辊3、烟道4和余热回收段5，加热室1、保温室2和余热回收段5依次相连，炉辊3通过炉墙32外的轴承座31安装在加热室1、保温室2和余热回收段5内，余热回收段5的炉墙32上面为余热回收锅炉6，下面为炉底34，在保温室2的尾端有烟道4。
钢管在辊底式连续正退火炉中，经过加热室1高温快速加热和保温室2保温后，再经过余热回收段5上的余热回收锅炉6余热利用后出炉（出炉温度可以控制在250℃左右），在空气中冷却；加热室1和保温室2中的高温烟气经保温室2尾端的烟道4排出。
实施例二：
如图5所示： 一种节能型辊底连续式光亮正退火炉，包括加热室1、保温室2、炉辊3、烟道4和余热回收段5，加热室1、保温室2和余热回收段5依次相连，炉辊3通过炉墙32外的轴承座31安装在加热室1、保温室2和余热回收段5内，余热回收段5的炉墙32上面为余热回收锅炉6，下面为炉底34，在余热回收锅炉6的尾端有烟道4，余热回收锅炉6内有烟管。
钢管在辊底式连续正退火炉中，经过加热室1高温快速加热和保温室2保温后，再经过余热回收段5上的余热回收锅炉6余热利用后出炉（出炉温度可以控制在250℃左右），在空气中冷却；与此同时，加热室1和保温室2中的高温烟气经过余热回收锅炉6内的烟管，被余热利用后再经余热回收锅炉6尾端的烟道4排出。
实施例三：
如图6所示： 一种节能型辊底连续式光亮正退火炉，包括加热室1、保温室2、炉辊3、烟道4和余热回收段5，加热室1、保温室2和余热回收段5依次相连，炉辊3通过炉墙32外的轴承座31安装在加热室1、保温室2和余热回收段5内，余热回收段5的炉墙32上面为余热回收锅炉6，下面为炉底34，在加热室1的进口端有烟道4。
钢管在辊底式连续正退火炉中，经过加热室1高温快速加热和保温室2保温后，再经过余热回收段5上的余热回收锅炉6余热利用后出炉（出炉温度可以控制在250℃左右），在空气中冷却；加热室1和保温室2中的高温烟气经加热室1进口端的烟道4排出。
如图7、8所示： 有烟管的 余热回收锅炉6包括烟管61、锅筒62、热交换管63、下降管64和集箱管65，烟管61位于锅筒62内，锅筒62上有进水管611、水位计管612和检修人孔613，底部有排污管614，热交换管63的形状为L形，以便尽可能的靠近钢管，热交换管63从前到后分成若干排，每排共六根，其中三根热交换管63的下部与左集箱管65连接，另外三根热交换管63的下部与右集箱管65连接，六根热交换管63的上部均与锅筒62连接；下降管64分前后两排共四根，前排和后排各有左右两根下降管64，左右下降管64的下部分别与左右集箱管65连接，上部均与锅筒62连接；左右集箱管65底部有集箱排污管651，锅筒62和热交换管63的外侧有保温层66，下降管64和集箱管65的外周有保温层66；余热回收锅炉6的左右集箱管65座落在余热回收段5的炉墙32上。
加热室1和保温室2中的高温烟气经过余热回收锅炉6内的烟管61，被余热利用后再经余热回收锅炉6尾端的烟道4排出；与此同时，从保温室2出来的钢管在经过余热回收段5上时，温度高达800℃左右的钢管的热量被余热回收锅炉6的锅筒62和热交换管63吸收后出炉（出炉温度可以控制在250℃左右），锅筒62内的水经过下降管64流入集箱管65，集箱管65内的水在热交换管63内吸热升温后，再流回到锅筒62内，如此循环进行热交换，不断地产生蒸汽，供冷拔钢管生产过程中的的酸洗工序加热用，无需通过燃煤（气）锅炉产生蒸气，节约大量的能源。
如图9、10所示： 无烟管的 余热回收锅炉6包括锅筒62、热交换管63、下降管64和集箱管65，锅筒62上有进水管611、水位计管612和检修人孔613，底部有排污管614，热交换管63的形状为L形，以便尽可能的靠近钢管，热交换管63从前到后分成若干排，每排共六根，其中三根热交换管63的下部与左集箱管65连接，另外三根热交换管63的下部与右集箱管65连接，六根热交换管63的上部均与锅筒62连接；下降管64分前后两排共四根，前排和后排各有左右两根下降管64，左右下降管64的下部分别与左右集箱管65连接，上部均与锅筒62连接；左右集箱管65底部有集箱排污管651，锅筒62和热交换管63的外侧有保温层66，下降管64和集箱管65的外周有保温层66；余热回收锅炉6的左右集箱管65座落在余热回收段5的炉墙32上。
从保温室2出来的钢管在经过余热回收段5上时，温度高达800℃左右的钢管的热量被余热回收锅炉6的锅筒62和热交换管63吸收后出炉（出炉温度可以控制在250℃左右），锅筒62内的水经过下降管64流入集箱管65，集箱管65内的水在热交换管63内吸热升温后，再流回到锅筒62内，如此循环进行热交换，不断地产生蒸汽，供冷拔钢管生产过程中的的酸洗工序加热用，无需通过燃煤（气）锅炉产生蒸气，节约大量的能源。

Claims (8)

1、 一种节能型辊底连续式光亮正退火炉， 其特征是 包括加热室、保温室、炉辊、烟道和余热回收段，加热室、保温室和余热回收段依次相连，炉辊通过炉墙外的轴承座安装在加热室、保温室和余热回收段内，余热回收段的炉墙上面为余热回收锅炉，在保温室的尾端或加热室的进口端有烟道；余热回收锅炉包括锅筒、热交换管、下降管和集箱管，锅筒上有进水管、水位计管和检修人孔，底部有排污管，热交换管和下降管的上部与锅筒连接，下部分别与左右集箱管连接，左右集箱管底部有集箱排污管，锅筒和热交换管的外侧有保温层，下降管和集箱管的外周有保温层。
2、根据权利要求1所述的 节能型辊底连续式光亮正退火炉 ，其特征是 下降管分前后两排共四根，前排和后排各有左右两根下降管，左右下降管的下部分别与左右集箱管连接，上部均与锅筒连接；热交换管从前到后分成若干排，每排共六根，其中三根热交换管的下部与左集箱管连接，另外三根热交换管的下部与右集箱管连接，六根热交换管的上部均与锅筒连接；热交换管形状为L形。
3 、根据权利要求1或2所述的 节能型辊底连续式光亮正退火炉 ，其特征是 余热回收锅炉的左右两根集箱管座落在余热回收段的炉墙上。
4 、 一种节能型辊底连续式光亮正退火炉， 其特征是 包括加热室、保温室、炉辊、烟道和余热回收段，加热室、保温室和余热回收段依次相连，炉辊通过炉墙外的轴承座安装在加热室、保温室和余热回收段内，余热回收段的炉墙上面为余热回收锅炉，在余热回收锅炉的尾端有烟道，余热回收锅炉内有烟管；余热回收锅炉包括烟管、锅筒、热交换管、下降管和集箱管，烟管位于锅筒内，锅筒上有进水管、水位计管和检修人孔，底部有排污管，热交换管和下降管的上部与锅筒连接，下部分别与左右集箱管连接，左右集箱管底部有集箱排污管，锅筒和热交换管的外侧有保温层，下降管和集箱管的外周有保温层。
5 、根据权利要求4所述的 节能型辊底连续式光亮正退火炉 ，其特征是 下降管分前后两排共四根，前排和后排各有左右两根下降管，左右下降管的下部分别与左右集箱管连接，上部均与锅筒连接；热交换管从前到后分成若干排，每排共六根，其中三根热交换管的下部与左集箱管连接，另外三根热交换管的下部与右集箱管连接，六根热交换管的上部均与锅筒连接；热交换管形状为L形，以便尽可能的靠近热源吸收余热。
6 、根据权利要求4或5所述的节能型辊底连续式光亮正退火炉，其特征是余热回收锅炉的左右两根集箱管座落在余热回收段的炉墙上。
7 、 一种节能型辊底连续式光亮正退火炉， 其特征是 包括加热室、保温室、炉辊、烟道和余热回收段，加热室、保温室和余热回收段依次相连，炉辊通过炉墙外的轴承座安装在加热室、保温室和余热回收段内，余热回收段的炉墙上面为余热回收锅炉，在保温室的尾端或加热室的进口端有烟道；余热回收锅炉包括锅筒、热交换管、下降管和集箱管，锅筒上有进水管、水位计管和检修人孔，底部有排污管，热交换管和下降管的上部与锅筒连接，下部分别与左右集箱管连接，左右集箱管底部有集箱排污管，锅筒和热交换管的外侧有保温层，下降管和集箱管的外周有保温层；下降管分前后两排共四根，前排和后排各有左右两根下降管，左右下降管的下部分别与左右集箱管连接，上部均与锅筒连接；热交换管从前到后分成若干排，每排共六根，其中三根热交换管的下部与左集箱管连接，另外三根热交换管的下部与右集箱管连接，六根热交换管的上部均与锅筒连接；热交换管形状为L形；余热回收锅炉的左右两根集箱管座落在余热回收段的炉墙上。
8 、 一种节能型辊底连续式光亮正退火炉， 其特征是 包括加热室、保温室、炉辊、烟道和余热回收段，加热室、保温室和余热回收段依次相连，炉辊通过炉墙外的轴承座安装在加热室、保温室和余热回收段内，余热回收段的炉墙上面为余热回收锅炉，在余热回收锅炉的尾端有烟道，余热回收锅炉内有烟管；余热回收锅炉包括烟管、锅筒、热交换管、下降管和集箱管，烟管位于锅筒内，锅筒上有进水管、水位计管和检修人孔，底部有排污管，热交换管和下降管的上部与锅筒连接，下部分别与左右集箱管连接，左右集箱管底部有集箱排污管，锅筒和热交换管的外侧有保温层，下降管和集箱管的外周有保温层；下降管分前后两排共四根，前排和后排各有左右两根下降管，左右下降管的下部分别与左右集箱管连接，上部均与锅筒连接；热交换管从前到后分成若干排，每排共六根，其中三根热交换管的下部与左集箱管连接，另外三根热交换管的下部与右集箱管连接，六根热交换管的上部均与锅筒连接；热交换管形状为L形，以便尽可能的靠近热源吸收余热；余热回收锅炉的左右两根集箱管座落在余热回收段的炉墙上。
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CN102679301A (zh) * 2012-04-28 2012-09-19 衡阳市丁点儿工业炉节能有限公司 节能型辊底连续式窑炉余热锅炉
CN102676788A (zh) * 2012-04-28 2012-09-19 衡阳市丁点儿工业炉节能有限公司 节能型辊底连续式光亮正退火炉
CN202626241U (zh) * 2012-04-28 2012-12-26 衡阳市丁点儿工业炉节能有限公司 节能型辊底连续式光亮正退火炉

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