CN108072274A - A kind of high-efficiency heat-accumulating tubular heater system - Google Patents

A kind of high-efficiency heat-accumulating tubular heater system Download PDF

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CN108072274A
CN108072274A CN201610983077.4A CN201610983077A CN108072274A CN 108072274 A CN108072274 A CN 108072274A CN 201610983077 A CN201610983077 A CN 201610983077A CN 108072274 A CN108072274 A CN 108072274A
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combustion
regenerator
exhaust gas
air
gas
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陈云斌
陈天
余建华
陈志勋
王宏成
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Hubei Xin Long Long Technology Equipment Co Ltd
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Hubei Xin Long Long Technology Equipment Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00Furnaces of a kind not covered by any of groups F27B1/00 - F27B15/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23LSUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00Heating of air supplied for combustion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/10Arrangements for using waste heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/10Arrangements for using waste heat
    • F27D17/12Arrangements for using waste heat using heat storage
    • F27D17/13Arrangements for using waste heat using heat storage using regenerative heat exchangers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Supply (AREA)

Abstract

本发明公开了一种高效蓄热式管式加热炉系统,涉及管式加热炉和节能减排技术领域,用于解决现有管式加热炉热效率低、寿命短、稳定性不好和系统投资高等问题,本发明包括管式炉本体、烧嘴、蓄热室、四通换向阀、鼓风机、引风机、配风阀和火焰检测器等设备,鼓风机将助燃空气由室温分别周期性鼓入左右蓄热室,分别与对应的蓄热室换热,将助燃空气温度升到300℃以上,尾气分别周期性通过相应蓄热室,与对应的蓄热室换热后温度逐步降至130℃左右经引风机排出,空气和尾气分别在左右双蓄热室周期性交换,实现燃烧的高效稳定,同时省去了传统的对流段,且排烟温度降低热效率提高,使管式炉综合投资最省和使用寿命延长。

The invention discloses a high-efficiency regenerative tubular heating furnace system, relates to the technical field of tubular heating furnaces and energy saving and emission reduction, and is used to solve the problem of low thermal efficiency, short service life, poor stability and system investment of existing tubular heating furnaces. Advanced problem, the present invention includes tubular furnace body, burner, regenerator, four-way reversing valve, blower, induced draft fan, air distribution valve and flame detector etc. The left and right regenerators exchange heat with the corresponding regenerators respectively, raising the temperature of the combustion air to above 300°C, and the exhaust gas passes through the corresponding regenerators periodically, and the temperature gradually drops to 130°C after exchanging heat with the corresponding regenerators The left and right are exhausted by the induced draft fan, and the air and exhaust gas are periodically exchanged in the left and right double regenerators respectively to achieve high efficiency and stability of combustion. At the same time, the traditional convection section is omitted, and the exhaust gas temperature is reduced and the thermal efficiency is improved, making the comprehensive investment of the tube furnace the lowest. Save and prolong service life.

Description

一种高效蓄热式管式加热炉系统A high-efficiency regenerative tubular heating furnace system

技术领域technical field

本发明公开了一种高效蓄热式管式加热炉系统,涉及管式加热炉和节能减排技术领域,具体公开了一种高效稳定的双向双回路蓄热式管式加热炉。The invention discloses a high-efficiency regenerative tubular heating furnace system, relates to the technical field of tubular heating furnaces and energy saving and emission reduction, and specifically discloses a high-efficiency and stable two-way double-circuit regenerative tubular heating furnace.

背景技术Background technique

管式加热炉是石油炼制、石油化工和煤化工等工业中广泛使用的工艺加热炉,被加热物质在管内流动介质为气体或液体,并且都是易燃易爆的物质,操作条件苛刻,同时长周期运转不间断操作,加热方式直接受火。管式加热炉的排烟温度可降低到100℃左右,实现烟气中含酸水蒸气的部分冷凝,且在回收烟气低温显热的同时,能回收部分含酸水蒸气的汽化潜热,进一步提高加热炉热效率,节约能源。Tubular heating furnace is a process heating furnace widely used in petroleum refining, petrochemical and coal chemical industries. The flow medium of the heated material in the tube is gas or liquid, and they are all flammable and explosive substances. The operating conditions are harsh. At the same time, it operates continuously for a long period of time, and the heating method is directly exposed to fire. The exhaust gas temperature of the tubular heating furnace can be reduced to about 100°C to realize partial condensation of the acid-containing water vapor in the flue gas, and while recovering the low-temperature sensible heat of the flue gas, part of the latent heat of vaporization of the acid-containing water vapor can be recovered, further Improve the thermal efficiency of the heating furnace and save energy.

现有技术中关于管式加热炉的文献较多,例如申请号201520869189.8的发明公开了一种高效管式均匀受热加热炉,包括管式炉体,其特征在于,所述管式炉体内设有燃烧室和热交换室,所述管式炉体的一端为与燃烧室连通的燃烧室入口,管式炉体的另一端为与燃烧室连通的排烟口,在靠近燃烧室入口的管式炉体上设有受热介质出口,在靠近排烟口的管式炉体上设有受热介质入口;所述热交换室与受热介质入口和受热介质出口均相互连通;所述燃烧室包括燃烧室外燃烧室和内燃烧室,所述外燃烧室套设在管式炉体的内壁上,所述内燃烧室与外燃烧室的底部相互连通,所述内燃烧室和外燃烧室的顶部与排烟口连通;所述内燃烧室与外燃烧室之间形成用于介质受热的热交换室;所述外燃烧室的内壁上设有第一螺旋导流板,所述内燃烧室的外壁上设有与第一螺旋导流板螺旋方向相反的第二螺旋导流板。In the prior art, there are many documents about tubular heating furnaces. For example, the invention of application number 201520869189.8 discloses a high-efficiency tubular heating furnace with uniform heating, including a tubular furnace body. It is characterized in that the tubular furnace body is equipped with Combustion chamber and heat exchange chamber, one end of the tubular furnace body is the entrance of the combustion chamber connected with the combustion chamber, the other end of the tubular furnace body is the smoke outlet connected with the combustion chamber, and the tubular furnace body near the entrance of the combustion chamber A heated medium outlet is provided on the furnace body, and a heated medium inlet is provided on the tubular furnace body near the smoke exhaust port; the heat exchange chamber communicates with the heated medium inlet and the heated medium outlet; the combustion chamber includes a combustion chamber Combustion chamber and inner combustion chamber, the outer combustion chamber is sleeved on the inner wall of the tubular furnace body, the bottom of the inner combustion chamber and the outer combustion chamber communicate with each other, the top of the inner combustion chamber and the outer combustion chamber are connected to the exhaust The smoke port is connected; a heat exchange chamber for medium heating is formed between the inner combustion chamber and the outer combustion chamber; the inner wall of the outer combustion chamber is provided with a first spiral deflector, and the outer wall of the inner combustion chamber is A second helical baffle with a helical direction opposite to that of the first helical baffle is provided.

申请号为201110459125.7的发明专利公开了一种管式加热炉余热回收系统,包括鼓风机、前置预热器及空气预热器,前置预热器设置于鼓风机的进口处或出口处,前置预热器的出口与空气预热器的进口连接,冷空气经过鼓风机后,进入前置预热器,经前置预热器加热后排出,最后进入空气预热器;前置预热器为翅片管换热器或管束式换热器;前置预热器中的热源为热水或蒸汽。The invention patent with application number 201110459125.7 discloses a waste heat recovery system for tubular heating furnaces, which includes a blower, a pre-heater and an air pre-heater. The pre-heater is set at the inlet or outlet of the blower. The outlet of the preheater is connected to the inlet of the air preheater. After passing through the blower, the cold air enters the preheater, is heated by the preheater and then discharged, and finally enters the air preheater; the preheater is Finned tube heat exchanger or tube bundle heat exchanger; the heat source in the preheater is hot water or steam.

然而,现有的管式加热炉虽然在尾气余热利用方面增加一些前置预热器、热交换器或在燃烧室与换热室之间设置了扰流换热室、热交换室,但均为间接换热,换热面积受限,管道易结垢,热能利用率不高,蓄热式管式加热炉利用蓄热室吸收尾气余热来直接加热助燃空气,直接加热,且采用双向双回路蓄热室,燃烧稳定,热能利用率较高,单位负荷管式炉占地面积小,综合投资低,使用寿命长。However, although the existing tubular heating furnaces add some pre-heaters and heat exchangers in the utilization of exhaust waste heat or set up a turbulent flow heat exchange chamber and a heat exchange chamber between the combustion chamber and the heat exchange chamber, they all For indirect heat exchange, the heat exchange area is limited, the pipeline is easy to scale, and the heat energy utilization rate is not high. The regenerative tubular heating furnace uses the regenerator to absorb the waste heat of the exhaust gas to directly heat the combustion air, direct heating, and adopts two-way double-circuit Regenerator, stable combustion, high utilization rate of heat energy, small footprint per unit load tube furnace, low comprehensive investment and long service life.

发明内容Contents of the invention

本发明在保证燃烧稳定的情况下,最大限度的提高管式加热炉热能利用率,而提供一种高效蓄热式管式加热炉,能够将尾气余热由间接换热变为直接换热,将换热管或换热室改为蓄热室,采用双向双回路蓄热室,通过控制系统在蓄热室实现助燃空气和尾气周期性换热,充分利用尾气余热。Under the condition of ensuring stable combustion, the present invention maximizes the utilization rate of heat energy of the tubular heating furnace, and provides a high-efficiency regenerative tubular heating furnace, which can change the waste heat of tail gas from indirect heat exchange to direct heat exchange. The heat exchange tube or heat exchange chamber is changed to a regenerator, and a two-way double-circuit regenerator is adopted. The periodic heat exchange between the combustion air and the exhaust gas is realized in the regenerator through the control system, and the waste heat of the exhaust gas is fully utilized.

为解决上述技术问题,本发明采取的技术方案是:In order to solve the problems of the technologies described above, the technical scheme that the present invention takes is:

一种高效蓄热式管式加热炉系统包括管式炉本体、烧嘴、蓄热室、四通换向阀、鼓风机、引风机、配风阀和火焰检测器等设备,其特征在于该管式加热炉系统燃烧需要的助燃空气和产生的尾气分别在双向双回路蓄热室内周期性交换实现换热,即左边和右边两个方向,每个方向分别为双回路蓄热室,实现单独的交换;左边助燃空气通过鼓风机分别周期性鼓入左边一个经尾气换热后的蓄热室,使助燃空气的温度由室温升至300℃以上,左边尾气通过引风机周期性从左边另一个经助燃空气降温的蓄热室,尾气温度逐步降至130℃左右排出;右边助燃空气通过鼓风机分别周期性鼓入右边一个经尾气换热后的蓄热室,使助燃空气的温度由室温升至300℃以上,右边尾气通过引风机周期性从右边另一个经助燃空气降温的蓄热室,尾气温度逐步降至130℃左右排出;所述的管式加热炉助燃空气和尾气分别经左右两边蓄热室经过一定周期换向操作,周而复始反复循环,达到节能效果;煤气没有进行交换,且助燃空气和尾气在左右两边蓄热室交换时间错开,使燃烧系统稳定;烧嘴采用扩散燃烧方式,空、煤气分别喷入炉膛,可避免回火,加大燃烧调节范围,利用空、煤气流速差提高空煤气混合速度,保证燃烧完全性;远程控制按工艺顺序自动启动或停止相关设备;设置相关安全联锁,确保管式加热炉系统的运行安全。A high-efficiency regenerative tubular heating furnace system includes a tubular furnace body, a burner, a regenerator, a four-way reversing valve, a blower, an induced draft fan, an air distribution valve, and a flame detector. The combustion-supporting air required by the combustion of the type heating furnace system and the exhaust gas produced are respectively exchanged periodically in the two-way double-circuit regenerator to realize heat exchange, that is, the left and right directions, and each direction is a double-circuit regenerator to realize a separate Exchange; the combustion-supporting air on the left is periodically blown into the regenerator on the left by the exhaust gas heat exchange through the blower, so that the temperature of the combustion-supporting air rises from room temperature to above 300 ° C, and the exhaust gas on the left passes through the induced draft fan periodically from the other to the left. In the regenerator where the combustion air cools down, the temperature of the exhaust gas is gradually reduced to about 130°C and discharged; the combustion air on the right is periodically blown into the regenerator on the right by the blower, so that the temperature of the combustion air rises from room temperature to Above 300°C, the exhaust gas on the right is periodically discharged from another regenerator on the right which is cooled by the combustion air through the induced draft fan, and the temperature of the exhaust gas gradually drops to about 130°C; The heat chamber undergoes a certain period of reversing operation, repeated cycles, to achieve energy-saving effects; the gas is not exchanged, and the exchange time of the combustion-supporting air and exhaust gas in the left and right regenerators is staggered, so that the combustion system is stable; the burner adopts the diffusion combustion method, and the air Gas and gas are sprayed into the furnace separately to avoid tempering, increase the range of combustion adjustment, and use the difference in air and gas flow rates to increase the mixing speed of air and gas to ensure the completeness of combustion; remote control automatically starts or stops related equipment according to the process sequence; set up related safety Interlocking to ensure the safe operation of the tube heating furnace system.

所述助燃空气和尾气分别在左右两边蓄热室内实现周期性交换均通过四通换向阀,经过设置的程序自动控制,即控制程序自动控制好周期性交换的时间间隔和各阀门开关的先后顺序。The combustion-supporting air and exhaust gas are periodically exchanged in the regenerators on the left and right sides respectively, and both pass through the four-way reversing valve, which is automatically controlled by the set program, that is, the control program automatically controls the time interval of the periodic exchange and the sequence of each valve switch. order.

所述助燃空气和尾气在左右两边蓄热室交换时间错开,即左右两边蓄热室分别更换助燃空气和尾气进出位置的时间不同,减少燃烧系统的波动,一边出现故障时,不影响另一边的运行。The combustion-supporting air and exhaust gas are exchanged at different times in the left and right regenerators, that is, the time for changing the combustion-supporting air and exhaust gas in and out of the left and right regenerators is different, so as to reduce the fluctuation of the combustion system, and when one side fails, it does not affect the other side. run.

所述煤气不交换,即煤气没有经过蓄热室,而是直接进烧嘴,使燃烧稳定。The gas is not exchanged, that is, the gas does not pass through the regenerator, but directly enters the burner, so that the combustion is stable.

所述蓄热室采用蓄热能力强的莫来石陶瓷蓄热室,尾气和助燃空气直接进入蓄热室内部,与蓄热室直接接触,主要通过热传导和热辐射的方式将热量传递给蓄热室,蓄热室再把热量传给助燃空气,因蓄热室设有防堵的孔型,能防堵并易清理,设有防堵层和防沾粘涂料。The regenerator adopts a mullite ceramic regenerator with strong heat storage capacity. The exhaust gas and combustion-supporting air directly enter the regenerator and directly contact with the regenerator. The heat is transferred to the regenerator mainly through heat conduction and heat radiation. The heat chamber and the regenerator transfer heat to the combustion air. Because the regenerator is equipped with an anti-blocking hole pattern, it can prevent blockage and be easy to clean. It is equipped with an anti-blocking layer and anti-sticking paint.

所述蓄热式管式加热炉的烧嘴,采用扩散燃烧方式,空、煤气分别喷入炉膛,可避免回火,加大燃烧调节范围;采用高煤气流速和低空气流速设计,这样可利用流速差提高空煤气混合速度,保证燃烧完全性。The burner of the regenerative tubular heating furnace adopts the diffusion combustion method, and the air and gas are sprayed into the furnace respectively, which can avoid tempering and increase the range of combustion adjustment; it is designed with high gas flow rate and low air flow rate, so that it can be used The difference in flow velocity increases the mixing velocity of air and gas to ensure the completeness of combustion.

所述鼓风机、引风机、四通换向阀和火焰检测器等远程控制监控及按工艺顺序先后自动启动或停止,使助燃空气和尾气在左右蓄热室周期性换向,另外通过控制程序控制调节控制管式加热炉的温度、流量和压力等相关参数。The blower, induced draft fan, four-way reversing valve and flame detector are remotely controlled and monitored and automatically started or stopped according to the process sequence, so that the combustion-supporting air and exhaust gas are periodically reversed in the left and right regenerators, and controlled by the control program Adjust and control the relevant parameters such as temperature, flow and pressure of the tube heating furnace.

所述蓄热式管式加热炉设置大火和小火火焰检测信号监控火焰情况,通过相关安全联锁装置,确保系统的运行安全。The regenerative tubular heating furnace is equipped with large fire and small fire flame detection signals to monitor the flame situation, and the safety of the system is ensured through relevant safety interlocking devices.

所述的传统管式炉与高效蓄热式管式加热炉可切换使用,即使蓄热室出现故障,炉体本身也可以正常生产。The traditional tubular furnace and the high-efficiency regenerative tubular heating furnace can be switched for use, and even if the regenerator breaks down, the furnace body itself can produce normally.

与现有技术相比,本发明有以下有益效果:Compared with the prior art, the present invention has the following beneficial effects:

高效蓄热式管式加热炉换向效率高,蓄热换热能力强,可将能源利用率大大提高,换热后尾气排放温度比传统管式炉尾气温度低250℃到300℃,比金属换热炉尾气温度低120℃到200℃。The high-efficiency regenerative tubular heating furnace has high reversing efficiency and strong heat storage and heat exchange capacity, which can greatly improve energy utilization. After heat exchange, the exhaust gas temperature is 250°C to 300°C lower than that of traditional tubular furnace exhaust gas, which is lower than that of metal The exhaust gas temperature of the heat exchange furnace is 120°C to 200°C lower.

蓄热室使用寿命长、成本低,蓄热室不存在被氧化、结垢降低换热效率降低的问题,金属换热器一般在使用3个月后就会出现上述问题,3年后基本就没什么效果了。The regenerator has a long service life and low cost. The regenerator does not have the problems of being oxidized, scaling and reducing the heat transfer efficiency. Metal heat exchangers generally have the above problems after 3 months of use, and they basically disappear after 3 years. Nothing works anymore.

高效蓄热式管式加热炉减少了对流段、传导段,同时还减少了空气换热器、蒸汽汽化器及相应的配管、电控等设施,在同样负荷情况下,节能可以达到30%以上,系统投资降低30%。The high-efficiency regenerative tubular heating furnace reduces the convection section, the conduction section, and also reduces the air heat exchanger, steam evaporator, corresponding piping, electric control and other facilities. Under the same load condition, the energy saving can reach more than 30%. System investment is reduced by 30%.

高效蓄热式管式加热炉燃烧稳定,在交换过程中双向双回路经过蓄热室,煤气不切换,且一旦一边出现故障也不会影响生产。The high-efficiency regenerative tubular heating furnace has stable combustion. During the exchange process, the two-way double-circuit passes through the regenerator, and the gas does not switch, and once a failure occurs on one side, it will not affect production.

高效蓄热式管式加热炉自动化水平高,通过程序控制,实现自动交换和相关参数的自动调节,安全可靠。The high-efficiency regenerative tubular heating furnace has a high level of automation. Through program control, automatic exchange and automatic adjustment of related parameters are realized, which is safe and reliable.

附图说明Description of drawings

图1是发明相关的工作流程示意图。Figure 1 is a schematic diagram of the workflow related to the invention.

图中标记:1-管式炉本体,2-烟囱,3-高温四通换向阀,4-蓄热室,5-烧嘴,6-小火检测器,7-大火检测器,8-低温四通换向阀,9-配风阀,10-引风机,11-鼓风机,12-煤气入口。Marks in the figure: 1-tube furnace body, 2-chimney, 3-high temperature four-way reversing valve, 4-regenerator, 5-burner, 6-small fire detector, 7-high fire detector, 8- Low temperature four-way reversing valve, 9-air distribution valve, 10-induced fan, 11-blower, 12-gas inlet.

具体实施方式Detailed ways

下面结合附图及实施例对本发明中的技术方案作进一步说明。The technical solutions in the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

结合附图,本发明一种高效蓄热式管式加热炉系统,包括1-管式炉本体,2-烟囱,3-高温四通换向阀,4-蓄热室,5-烧嘴,6-小火检测器,7-大火检测器,8-低温四通换向阀,9-配风阀,10-引风机,11-鼓风机,12-煤气入口;管式加热炉系统燃烧通过煤气和助燃空气在烧嘴5处混合燃烧,被加热介质在管式炉本体1内加热,产生的尾气由烟囱2通过高温四通换向阀3经蓄热室4和低温四通换向阀8经引风机11排出,助燃空气通过鼓风机11经低温四通换向阀8到蓄热室4经高温四通换向阀3进烧嘴5,煤气直接通过煤气入口12进入烧嘴,与空气混合后燃烧;助燃空气和产生的尾气分别在双向双回路蓄热室内通过高温四通换向阀3和低温四通换向阀8经控制系统控制周期性交换实现换热,即左边和右边两个方向,每个方向分别为双回路蓄热室,实现单独的交换;左边助燃空气通过鼓风机11分别周期性鼓入左边一个经尾气换热后的蓄热室,使助燃空气的温度由室温升至300℃以上,左边尾气通过引风机10周期性从左边另一个经助燃空气降温的蓄热室,尾气温度逐步降至130℃左右排出;右边助燃空气通过鼓风机分11别周期性鼓入右边一个经尾气换热后的蓄热室,使助燃空气的温度由室温升至300℃以上,右边尾气通过引风机10周期性从右边另一个经助燃空气降温的蓄热室,尾气温度逐步降至130℃左右排出;煤气没有进行交换,而助燃空气和尾气在左右两边蓄热室交换时间错开,即左边蓄热室交换一段时间间隔后右边蓄热室再交换,右边蓄热室交换一段时间间隔后左边再进行交换,烧嘴燃烧稳定。配风阀9负责两边助燃空气和尾气量的分配。小火检测器6监控小火信号,大火检测器7监控大火信号,与煤气切断阀和其它一些设备构成安全联锁。In conjunction with the accompanying drawings, the present invention provides a high-efficiency regenerative tubular heating furnace system, including 1-tube furnace body, 2-chimney, 3-high temperature four-way reversing valve, 4-regenerator, 5-burner, 6-small fire detector, 7-high fire detector, 8-low temperature four-way reversing valve, 9-air distribution valve, 10-induced fan, 11-blower, 12-gas inlet; the tubular heating furnace system burns through the gas It is mixed with combustion-supporting air at the burner 5, and the heated medium is heated in the tube furnace body 1, and the exhaust gas generated is passed through the chimney 2 through the high-temperature four-way reversing valve 3, through the regenerator 4 and the low-temperature four-way reversing valve 8 Exhausted by the induced draft fan 11, the combustion-supporting air passes through the blower 11 through the low-temperature four-way reversing valve 8 to the regenerator 4 and enters the burner 5 through the high-temperature four-way reversing valve 3, and the gas directly enters the burner through the gas inlet 12 and mixes with air Post-combustion: the combustion-supporting air and the exhaust gas are respectively passed through the high-temperature four-way reversing valve 3 and the low-temperature four-way reversing valve 8 in the two-way double-circuit regenerator, and are controlled by the control system to exchange periodically to realize heat exchange, that is, the left and right two Each direction is a double-circuit regenerator, which realizes separate exchange; the combustion air on the left is periodically blown into a regenerator on the left through the blower 11, which has been heat-exchanged by the exhaust gas, so that the temperature of the combustion air rises from the room temperature. When the temperature reaches above 300°C, the exhaust gas on the left is periodically discharged from another regenerator on the left through the induced draft fan 10, and the temperature of the exhaust gas is gradually reduced to about 130°C; the combustion air on the right is periodically blown into the right one by the blower 11 The regenerator after exhaust gas heat exchange raises the temperature of the combustion-supporting air from room temperature to above 300°C, and the exhaust gas on the right passes through the induced draft fan 10 periodically from the other regenerator on the right that is cooled by the combustion-supporting air, and the temperature of the exhaust gas gradually drops to Discharge at about 130°C; the gas is not exchanged, and the exchange time of the combustion-supporting air and exhaust gas in the left and right regenerators is staggered, that is, the left regenerator is exchanged for a period of time, and the right regenerator is exchanged again, and the right regenerator is exchanged for a period of time After that, the left side is exchanged again, and the burner burns stably. Air distribution valve 9 is responsible for the distribution of combustion-supporting air and exhaust gas volume on both sides. The small fire detector 6 monitors the small fire signal, and the large fire detector 7 monitors the large fire signal, forming a safety interlock with the gas shut-off valve and other equipment.

烧嘴5采用扩散燃烧方式,空、煤气分别喷入炉膛,可避免回火,加大燃烧调节范围,利用空、煤气流速差提高空煤气混合速度,保证燃烧完全性。The burner 5 adopts the diffusion combustion method, and the air and gas are sprayed into the furnace separately, which can avoid tempering, increase the range of combustion adjustment, and use the difference in air and gas flow rates to increase the mixing speed of air and gas to ensure complete combustion.

鼓风机11、引风机10、低温四通换向阀8和高温四通换向阀3等远程控制及按工艺顺序设置程序自动启动或停止;配风阀9控制左右两个回路助燃空气和煤气量的分配,通过阀开度调节两边量的大小;系统通过温度,压力,流量,火焰检测仪信号采集,实现全套设备自动连锁控制;四通换向阀出现故障,没有正常开关,程序自动切断煤气,鼓风机继续鼓风,在故障无法短时间排除时,切换为单阀组运行,可以保证管式炉正常使用,Remote control of blower 11, induced draft fan 10, low-temperature four-way reversing valve 8 and high-temperature four-way reversing valve 3, etc., and automatically start or stop according to the process sequence setting program; air distribution valve 9 controls the combustion air and gas volume of the left and right circuits The distribution of the two sides is adjusted through the valve opening; the system realizes the automatic chain control of the whole set of equipment through the temperature, pressure, flow and flame detector signal collection; the four-way reversing valve fails, there is no normal switch, the program automatically cuts off the gas , the blower continues to blow, and when the fault cannot be eliminated in a short time, it is switched to single-valve group operation, which can ensure the normal use of the tube furnace.

尾气温度过高,蓄热室温度异常,自动调整换向时间或者调整煤气量,鼓风机和引风机信号反馈中断,程序自动切断煤气,当主煤气压力过低时,系统会自动报警,切断主煤气;鼓风机出现故障或者出现电气故障的时候,煤气切断。If the exhaust gas temperature is too high and the regenerator temperature is abnormal, the reversing time or the gas volume will be adjusted automatically, the blower and induced draft fan signal feedback will be interrupted, and the program will automatically cut off the gas. When the main gas pressure is too low, the system will automatically alarm and cut off the main gas; In the event of blower failure or electrical failure, the gas is shut off.

本发明蓄热式管式加热炉尾气直接进入蓄热室,与蓄热室直接接触,主要通过热传导和热辐射的方式将热量传递给蓄热室,使蓄热室吸收热量,蓄热室温度升高,尾气温度降低;助燃空气也直接进入蓄热室,与蓄热室直接接触,直接通过热传导和热辐射的方式将蓄热室的热量吸收下来,蓄热室温度降低,助燃空气温度升高。The tail gas of the regenerative tubular heating furnace of the present invention directly enters the regenerator, directly contacts with the regenerator, and transfers heat to the regenerator mainly through heat conduction and heat radiation, so that the regenerator absorbs heat and the temperature of the regenerator As the exhaust gas temperature rises, the temperature of the exhaust gas decreases; the combustion air also directly enters the regenerator, directly contacts with the regenerator, and directly absorbs the heat of the regenerator through heat conduction and heat radiation, the temperature of the regenerator decreases, and the temperature of the combustion air rises. high.

本实用发明采用蓄热能力强和防堵孔型的莫来石陶瓷蓄热室,使用寿命长、成本低,耐激冷激热性;蓄热室不存在被氧化、结垢降低换热效率降低的问题;蓄热室设有保温功能,内附耐热钢衬;设有防移位功能(高温耐热钢)。The utility model adopts a mullite ceramic regenerator with strong heat storage capacity and anti-blocking hole type, which has long service life, low cost, and resistance to shock and heat; the regenerator does not have oxidation and scaling to reduce heat exchange efficiency Reduce the problem; the regenerator is equipped with heat preservation function, with heat-resistant steel lining inside; it is equipped with anti-displacement function (high temperature heat-resistant steel).

本发明本身自带平台和楼梯,便于操作及检修;管式炉的看火门和防爆门以及各种仪表设备有专门检修平台,操作起来简便易行;炉体隔热层主要才用莫来石浇注料和硅酸铝纤维毡,其能耐1300℃的温度;盘管支撑使用耐1100℃耐热钢铸造件,能稳定支撑盘管,不会出现事故。The invention has its own platform and stairs, which is convenient for operation and maintenance; the fire door, explosion-proof door and various instrumentation equipment of the tubular furnace have special maintenance platforms, which are simple and easy to operate; the heat insulation layer of the furnace body is mainly used. Stone casting material and aluminum silicate fiber felt, which can withstand the temperature of 1300 ℃; the coil support uses 1100 ℃ heat-resistant steel castings, which can stably support the coil without accidents.

以上所述仅为本发明的实施例而已,并不用以限制本发明,应当指出,任何熟悉本领域的技术人员在本发明所揭露的技术范围内,可轻易想到的变化、替换或改进,都应涵盖在本发明的保护范围之内。The above description is only an embodiment of the present invention, and is not intended to limit the present invention. It should be pointed out that any changes, substitutions or improvements 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.

Claims (9)

1.一种高效蓄热式管式加热炉系统包括管式炉本体、烧嘴、蓄热室、四通换向阀、鼓风机、引风机、配风阀和火焰检测器,其特征在于该管式加热炉装置燃烧需要的助燃空气和产生的尾气分别在双回路双蓄热室内周期性交换实现换热,助燃空气通过鼓风机分别周期性鼓入左边和右边一个经尾气换热后的蓄热室,使助燃空气的温度由室温升至300℃以上;尾气通过引风机周期性从左边和右边相对应经助燃空气降温的蓄热室,尾气温度逐步降至130℃左右排出,助燃空气和尾气分别实现双向双回路进出,经四通换向阀由程序控制左右蓄热室分别实现周期性交换,煤气不切换,减少燃烧的波动,提高热效率,延长管式炉使用寿命和降低综合投资。1. A high-efficiency regenerative tubular heating furnace system comprises a tubular furnace body, a burner, a regenerator, a four-way reversing valve, a blower, an induced draft fan, an air distribution valve and a flame detector, and is characterized in that the tube The combustion-supporting air required by the combustion of the type heating furnace device and the tail gas generated are periodically exchanged in the double-circuit double regenerator to realize heat exchange, and the combustion-supporting air is periodically blown into the left and right regenerators after heat exchange by the exhaust gas through the blower. , so that the temperature of the combustion-supporting air rises from room temperature to above 300°C; the exhaust gas passes through the induced draft fan periodically from the left and right corresponding to the regenerator cooled by the combustion-supporting air, and the temperature of the exhaust gas gradually drops to about 130°C and is discharged, the combustion-supporting air and exhaust gas Two-way double-circuit entry and exit are respectively realized, and the left and right regenerators are controlled by the program through the four-way reversing valve to realize periodic exchange respectively. The gas does not switch, which reduces combustion fluctuations, improves thermal efficiency, prolongs the service life of the tube furnace and reduces comprehensive investment. 2.根据权利要求1 所述的一种高效蓄热式管式加热炉系统,其特征在于工作过程是一个周期性和重复性的过程,即助燃空气分别在左蓄热室和右蓄热室周期性和重复性通过四通换向阀换向,分别与左边一个蓄热室和右边一个蓄热室换热升温后进烧嘴,尾气分别在左蓄热室和右蓄热室周期性和重复性通过四通换向阀换向,分别与左边另一个蓄热室和右边另一个蓄热室换热降温后由引风机经烟囱排出,通过控制程序进行控制,排烟温度降低,有利于延长管式炉寿命。2. A high-efficiency regenerative tubular heating furnace system according to claim 1, characterized in that the working process is a periodic and repetitive process, that is, the combustion-supporting air is respectively in the left regenerator and the right regenerator. Periodically and repeatedly through the four-way reversing valve, it exchanges heat with the left regenerator and the right regenerator respectively and then enters the burner after heating up. The exhaust gas is periodically and repeatedly in the left regenerator and right regenerator respectively. Reversed through the four-way reversing valve, respectively exchange heat with the other regenerator on the left and the other regenerator on the right to cool down, and then discharge it through the chimney by the induced draft fan. Controlled by the control program, the exhaust gas temperature is reduced, which is beneficial to extend tube furnace life. 3.根据权利1所述的一种高效蓄热式管式加热炉系统,其特征在于:采用左右双回路双蓄热室,即左边2个蓄热室1个进助燃空气1个出尾气,右边2个蓄热室1个进助燃空气1个出尾气,左右各自单独进行交换互不影响,且左边和右边交换的时间错开,保证燃烧的稳定。3. A high-efficiency regenerative tubular heating furnace system according to claim 1, characterized in that: left and right double circuits and double regenerators are used, that is, one of the two regenerators on the left enters combustion-supporting air and one exits exhaust gas, There are two regenerators on the right, one for combustion-supporting air and one for exhaust gas, the left and right exchanges independently without affecting each other, and the exchange time between the left and right is staggered to ensure stable combustion. 4.根据权利1所述的一种高效蓄热式管式加热炉系统,其特征在于:只是空气和尾气在蓄热室周期性交换和换热,煤气没有进行交换和换热直接进入煤气烧嘴,避免燃烧的波动。4. A high-efficiency regenerative tubular heating furnace system according to claim 1, characterized in that: only the air and exhaust gas are periodically exchanged and exchanged heat in the regenerator, and the gas directly enters the gas burning process without exchange and heat exchange. Mouth, avoid burning waves. 5.根据权利1所述的一种高效蓄热式管式加热炉系统,其特征在于:尾气和助燃空气直接进入蓄热室内部,与蓄热室直接接触,主要通过热传导和热辐射的方式将热量传递给蓄热室,蓄热室再把热量传给助燃空气,管式炉省去了传统的对流段,降低了管式炉的设备投资。5. A high-efficiency regenerative tubular heating furnace system according to claim 1, characterized in that: the tail gas and combustion air directly enter the regenerator, and directly contact with the regenerator, mainly through heat conduction and heat radiation The heat is transferred to the regenerator, and the regenerator transfers the heat to the combustion air. The tube furnace saves the traditional convection section and reduces the equipment investment of the tube furnace. 6.根据权利1所述的一种高效蓄热式管式加热炉系统,其特征在于:采用煤气烧嘴,使用扩散燃烧方式,空、煤气分别喷入炉膛,可避免回火,加大燃烧调节范围;采用高煤气流速和低空气流速设计,这样可利用流速差提高空煤气混合速度,保证燃烧完全性。6. A high-efficiency regenerative tubular heating furnace system according to claim 1, characterized in that: the gas burner is used, and the diffusion combustion method is used. Air and gas are injected into the furnace respectively, which can avoid tempering and increase combustion. Adjustment range: high gas flow rate and low air flow rate design are adopted, so that the difference in flow rate can be used to increase the mixing speed of air and gas to ensure the completeness of combustion. 7.根据权利1所述的一种高效蓄热式管式加热炉系统,其特征在于:采用双向双蓄热室,可以实现双向蓄热室同时使用,也可以单向使用,一向出现故障时,另一向可以正常使用,不影响正常生产。7. A high-efficiency regenerative tubular heating furnace system according to claim 1, characterized in that: it adopts two-way double regenerators, which can realize the simultaneous use of two-way regenerators, and can also be used in one direction. , and the other side can be used normally without affecting normal production. 8.根据权利1所述的一种高效蓄热式管式加热炉系统,其特征在于:设置大火和小火的火检检测控制信号,设置相关安全联锁,出现异常情况煤气会自动切断。8. A high-efficiency regenerative tubular heating furnace system according to claim 1, characterized in that: fire detection and control signals for large fire and small fire are set, and related safety interlocks are set, and the gas will be automatically cut off in abnormal situations. 9.根据权利1所述的一种高效蓄热式管式加热炉系统,其特征在于:鼓风机、引风机、低温四通阀、高温四通阀、烟道阀和自然通风阀远程控制按工艺顺序自动启动或停止,自动水平高,操作简便。9. A high-efficiency regenerative tubular heating furnace system according to claim 1, characterized in that: remote control of blower, induced draft fan, low-temperature four-way valve, high-temperature four-way valve, flue valve and natural ventilation valve according to the process Sequential automatic start or stop, high automatic level, easy to operate.
CN201610983077.4A 2016-11-09 2016-11-09 A kind of high-efficiency heat-accumulating tubular heater system Pending CN108072274A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110873531A (en) * 2019-12-19 2020-03-10 宁波劲锋工业炉有限公司 Gas type energy-saving crucible furnace
CN111829347A (en) * 2020-07-27 2020-10-27 鞍钢集团工程技术有限公司 A system and process for heating acid circulating gas using regenerative heating furnace
CN112503520A (en) * 2020-12-07 2021-03-16 上海电气上重铸锻有限公司 Pipeline system control method of heat accumulating type combustor and heating furnace

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CN201184696Y (en) * 2008-03-14 2009-01-21 江苏焱鑫科技集团有限公司 A tubular heating furnace
CN203489670U (en) * 2013-05-30 2014-03-19 北京神雾环境能源科技集团股份有限公司 Regenerative type continuous flame tube heating furnace
CN105674759A (en) * 2016-04-14 2016-06-15 麻永强 Off-line heat accumulating type system recycling device for waste heat of industrial furnace flue gas

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KR20020052059A (en) * 2000-12-23 2002-07-02 이구택 Overheating protection apparatus of the slab edge in reheating furnace
JP2002277171A (en) * 2001-03-19 2002-09-25 Miyamoto Kogyosho Co Ltd Heating furnace for regenerative burner
CN201184696Y (en) * 2008-03-14 2009-01-21 江苏焱鑫科技集团有限公司 A tubular heating furnace
CN203489670U (en) * 2013-05-30 2014-03-19 北京神雾环境能源科技集团股份有限公司 Regenerative type continuous flame tube heating furnace
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110873531A (en) * 2019-12-19 2020-03-10 宁波劲锋工业炉有限公司 Gas type energy-saving crucible furnace
CN111829347A (en) * 2020-07-27 2020-10-27 鞍钢集团工程技术有限公司 A system and process for heating acid circulating gas using regenerative heating furnace
CN112503520A (en) * 2020-12-07 2021-03-16 上海电气上重铸锻有限公司 Pipeline system control method of heat accumulating type combustor and heating furnace
CN112503520B (en) * 2020-12-07 2022-11-15 上海电气上重铸锻有限公司 Pipeline system control method of heat accumulating type combustor and heating furnace

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