CN202927865U - Waste heat recovery device - Google Patents

Waste heat recovery device Download PDF

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Publication number
CN202927865U
CN202927865U CN 201220607547 CN201220607547U CN202927865U CN 202927865 U CN202927865 U CN 202927865U CN 201220607547 CN201220607547 CN 201220607547 CN 201220607547 U CN201220607547 U CN 201220607547U CN 202927865 U CN202927865 U CN 202927865U
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CN
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section
heat
pipe
flue gas
waste heat
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CN 201220607547
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Chinese (zh)
Inventor
李法兴
李子民
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潍坊中阳机械科技有限公司
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    • 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
    • Y02E20/30Technologies for a more efficient combustion or heat usage
    • Y02E20/36Heat recovery other than air pre-heating
    • Y02E20/363Heat recovery other than air pre-heating at fumes level

Abstract

The utility model discloses a waste heat recovery device, which is characterized in that a lower part of the waste heat recovery device is a heat absorption section, which is arranged in a tail discharge pipeline of a flue gas system of a boiler, the heat absorption section is provided with multiple heat discharge and absorption metal pipes, an upper part of the waste heat recovery device is a heat release section, which is arranged outside the tail discharge pipeline of the flue gas system of the boiler, and a heating water pipe penetrates through the heat release section. The waste heat recovery device has the advantages that on the premise of ensuring the safe operation of the device, a purpose of energy conservation through large recovery of waste heat of medium and low temperature flue gas is realized, dewing corrosion and clogging caused thereby are avoided, the service life is prolonged, and the maintenance cost of the device is reduced.

Description

一种余热回收装置 One kind of heat recovery unit

技术领域 FIELD

[0001] 本实用新型涉及一种余热回收装置,具体地说是一种锅炉烟气排放管道的余热回收装置,属于余热回收装置领域。 [0001] The present invention relates to a waste heat recovery, waste heat recovery apparatus is particularly boiler flue gas discharge conduit, belonging to the field of waste heat recovery.

背景技术 Background technique

[0002]目前,中小型锅炉尾部通常未配有换热设备,排烟温度一般为170-280°C,大量烟气热能白白浪费被排放到空气中。 [0002] Currently, small and medium sized boilers are usually not equipped with a tail of heat transfer equipment, exhaust gas temperature is usually 170-280 ° C, a large amount of flue gas waste heat is discharged into the air. 这些无效热能不但污染了大气环境,而且造成了设备的热负荷增加。 These invalid heat not only pollutes the atmosphere, but also causes an increase in heat load device. 锅炉运行负荷较重时会使蒸汽压力异常,蒸汽处理不足,严重时还会影响到安全。 It causes abnormal pressure steam boiler when running heavy load, insufficient steam treatment so serious that it affects the safety.

发明内容 SUMMARY

[0003] 为了解决上述问题,本实用新型设计了一种余热回收装置,分为吸热段和放热段两部分,在保证设备安全运行的前提下,实现了大幅度回收中低温烟气余热的节能目的,避免了结露腐蚀和由此发生的堵灰,延长了使用寿命,降低了设备的维护成本。 [0003] In order to solve the above problems, the present invention designed a waste heat recovery unit, is divided into two parts, the evaporating section and the condensing section, under the premise to ensure the safe operation of the equipment, to achieve a substantial low-temperature flue gas heat recovery saving purposes, avoid plugging and corrosion ash condensation arising therefrom, to extend the service life, reduce equipment maintenance costs.

[0004] 本实用新型的技术方案为: [0004] The technical solution of the present invention is:

[0005] 一种余热回收装置,所述余热回收装置分为上、下两部分; [0005] A waste heat recovery, waste heat recovery into the upper and lower parts;

[0006] 所述的下部分为吸热段,设置在锅炉烟气系统尾部排放管道内,所述的吸热段设有若干排吸热金属管,每排吸热金属管的上下两端通过分连通管相连通,所述的分连通管的两端分别通过主连通管相连通,从而使吸热段的各吸热金属管相互连通,并与外界相隔离,所述的吸热金属管内装有循环水; A lower portion [0006] of the evaporating section is disposed in the boiler flue gas exhaust tail pipe system, the endothermic heat absorbing section is provided with a plurality of rows of metal pipes, upper and lower ends of each discharge tube via the heat absorbing metal divided the communicating pipe communicates, at both ends of the communication pipe is divided respectively by a main communicating pipe communicating to the respective heat absorbing endothermic section metal pipes communicate with each other, and isolated from the outside, the metal heat absorbing tube that has the circulating water;

[0007] 所述的上部分为放热段,设置在锅炉烟气系统尾部排放管道外,一条加热水管穿过所述放热段,所述的放热段为密闭结构; [0007] The upper portion of the condensing section is arranged outside the tail of the boiler flue gas exhaust duct system, a heat radiating section through the water, the exothermic section is a sealed structure;

[0008] 所述吸热段位于上端的主连通管通过上升管与所述的放热段相连;所述的放热段通过下降管与所述吸热段位于下端的主连通管相连。 [0008] The upper end of the evaporating section is connected to the main tube communicates with the riser through the radiating section; the exothermic section through a downcomer communicating with said evaporating section is connected at the lower end of the main tube.

[0009] 在锅炉烟气系统尾部水平段或竖直段加装换热器下段即吸热段,吸热段的结构是多根并联的密闭管排束构件,当烟气通过吸热段的对流管束时,将烟气的热量传递给管内的循环水,烟气温度降低,而管内的循环水吸收热量后,温度升高并使一部分循环水蒸发为水蒸汽,水蒸汽沿上升管进入换热器的上段即放热段,蒸汽被穿过放热段管的加热水管内待加热的水冷却,凝结成水,沿下降管返回到换热器的吸热段中,从而使加热水管的冷水被加热后得到利用。 [0009] In the next paragraphs i.e. endothermic boiler flue system tail section of the horizontal segment or a vertical heat exchanger installation, configuration evaporating section is a plurality of sealed tube rows parallel beam member, when the flue gas by the endothermic section when convection bank, the flue gas heat to the water circulating in the pipe, the flue gas temperature is reduced, and the circulation water absorbs heat in the tube, the temperature rises and the water portion of the circulating water is evaporated to steam which rises along the tube into the transducer i.e., the upper heat radiating section, the steam is cooled through the water in the heating water heat pipe section to be heated, condenses into water, drop along the tube is returned to the evaporating section of the heat exchanger, thereby heating the pipe cold water after being heated utilized.

[0010] 换热器的换热过程可概述为:在吸热段,放热物质是烟气,吸热物质是作为传热媒介的水,吸热段里的水是密闭的,吸热段的水从烟气里吸收热量,水吸收热量汽化为饱和蒸汽,在一定的压差下上升到换热器上段即放热段,向外界加热水管的冷水放出热量,并凝结成液体,经下降管返回到吸热段,并再次汽化,往复循环,完成了把热量从高端传向低端的单向导热。 Heat transfer process [0010] the heat exchanger can be summarized as follows: In the evaporating section, the exothermic substance is smoke, as a heat-absorbing substance is water, the water evaporating section of the heat transfer medium is closed, the evaporating section in water absorbs heat from the flue gas, the water absorbs heat of vaporization of saturated steam, at a pressure differential rises to segment i.e. radiating section on the heat exchanger, heat pipe cold heat release to the outside, and condenses into liquid, the drop return pipe to the evaporating section, and vaporized again, reciprocating cycle, heat is transferred from a completed low-end way high thermal conductivity.

[0011] 由于吸热段的结构是多根并联的密闭管排束构件,全部管子内的水和蒸汽是一个相互关联的整体,都在同一饱和温度下,所以其全部管子金属壁面温度整体分布均匀,与烟气温度保持较小梯度温降,温差10 - 15°C。 [0011] Since the structure of the evaporating section is a closed tube rows parallel a plurality of beam members, all of the water and steam inside the tube is a whole interrelated, are saturated at the same temperature, the entire tube wall metal temperature distribution of the entire uniform temperature gradient is kept small and the flue gas temperature drop, temperature 10 - 15 ° C. 因此,只要控制好内部介质的饱和温度,就可以实现对吸热段管子壁面温度的调控。 Thus, as long as a good control of the saturation temperature of the internal medium, we can realize the regulation of temperature of the endothermic wall of the tube segment.

[0012] 本实用新型的优点包括以下几点: [0012] The advantages of the present invention include the following:

[0013] (I)通过控制冷补水的流量来调节饱和水蒸汽的压力和温度,实现对受热面最低壁面温度的闭环控制,使壁面温度恒定或可调,以适应燃料种类及工况的变化,从而在保证设备安全运行的前提下,实现大幅度回收中低温烟气余热的节能目的; [0013] (I) saturated steam is adjusted by controlling the flow rate of the cold supply water pressure and temperature, the lowest closed-loop control of the wall temperature of the heating surface, the temperature of the wall surface constant or adjustable to accommodate changes in the type of fuel and the operating conditions so that to ensure safe operation of the premise equipment, energy saving purposes low temperature flue gas waste heat recovery significantly;

[0014] (2)在最大限度地降低排烟温度的同时,保持金属受热面壁面温度处于较高的温度水平,高于酸露点10_15°C,远离酸露点的腐蚀区域,从根本上避免了结露腐蚀和由此发生的堵灰,大幅度延长换热器的使用寿命,是传统热管换热器寿命的2-3倍,降低设备的维护成本; [0014] (2) while minimizing the exhaust gas temperature, keep the metal surface temperature of the heating walls at a higher temperature level, higher than the acid dew point 10_15 ° C, away from the region of acid dew point corrosion, and to avoid taking fundamentally Lu ash fouling and corrosion, greatly extend the service life of the heat exchanger thus occurring, the traditional life of the heat pipe heat exchanger 2-3 times, reduce equipment maintenance costs;

[0015] (3)实现了换热器金属受热面最低壁面温度处于可控调状态,使复合相变换热器具有相当幅度的调节能力,使排烟温度和壁面温度保持相对稳定,并能适应各种锅炉的燃料品种以及负荷30-100%的变化; [0015] (3) a metal heat exchanger to achieve the minimum wall heating surface temperature is controllably adjust state, the composite having a phase change heat regulation considerable degree, so that the exhaust gas temperature and the wall temperature remains relatively stable, and can 30-100% variation accommodate various species of boiler fuel and a load;

[0016] (4)在保留了热管换热器所具有的高效传热特性的同时,通过设备上的排气阀进行排气操作,有效消除不凝气体,使设备始终保持高效换热状态。 [0016] (4) retaining a heat pipe heat exchanger has a high heat transfer characteristics while exhausted through an exhaust valve operation device, effectively eliminate non-condensable gas, so that the device remains efficient heat transfer state.

[0017] 下面结合附图和实施例对本实用新型作进一步说明。 Figures and examples further illustrate the present invention for the [0017] following binding.

附图说明 BRIEF DESCRIPTION

[0018] 图1为本实用新型实施例余热回收装置的结构示意图; [0018] Figure 1 is a schematic structural diagram of an embodiment invention, waste heat recovery device;

[0019] 图中:1-吸热段、2-吸热金属管、3-分连通管、4-主连通管、5-放热段、6-加热水管、7-上升管、8-下降管。 [0019] In the drawings: 1- evaporating section, the metal heat absorbing tube 2-, 3- divided the communicating pipe, the communicating pipe main 4-, 5-condensing section, 6- heating pipes, the riser 7-, 8- decreased tube.

具体实施方式 detailed description

[0020] 以下对本实用新型的优选实施例进行说明,应当理解,此处所描述的优选实施例仅用于说明和解释本实用新型,并不用于限定本实用新型。 [0020] Hereinafter, embodiments of the present invention preferred embodiments will be described, it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, not to limit the present invention.

[0021] 实施例1 [0021] Example 1

[0022] 如图1所示,一种余热回收装置,所述余热回收装置分为上、下两部分; [0022] As shown in FIG 1 A waste heat recovery, waste heat recovery into the upper and lower parts;

[0023] 所述的下部分为吸热段1,设置在锅炉烟气系统尾部排放管道内,所述的吸热段I设有若干排吸热金属管2,每排吸热金属管2的上下两端通过分连通管3相连通,所述的分连通管3的两端分别通过主连通管4相连通,从而使吸热段的各吸热金属管相互连通,并与外界相隔离,所述的吸热金属管2内装有循环水; [0023] The lower portion of the evaporating section 1 is disposed in the boiler flue gas exhaust tail pipe system, the endothermic heat absorbing section I has a plurality of discharge tube 2, heat absorbing metal tubes per row 2 upper and lower ends by fractional communication pipe 3 is connected through the communication pipe at both ends of the partial main communicating pipe 3 are communicated through 4, such that each segment of the endothermic heat absorbing metal tubes communicate with each other, and isolated from the outside world, the heat absorbing tube 2 that has the circulating water;

[0024] 所述的上部分为放热段5,设置在锅炉烟气系统尾部排放管道外,一条加热水管6穿过所述放热段5,所述的放热段5为密闭结构,如密闭气包; [0024] The upper portion of the condensing section 5 is disposed outside the boiler flue gas exhaust tail pipe system, a heating water pipe 6 passes through the condensing section 5, section 5 of the heat sealed structure, such as closed air bag;

[0025] 所述吸热段5位于上端的主连通管4通过上升管7与所述的放热段5相连;所述的放热段5通过下降管8与所述吸热段5位于下端的主连通管4相连。 [0025] 5 at the upper end of the evaporating section of the main communication pipe 7 is connected to the radiating section 4 of the pipe 5 through the riser; the exothermic section through the downcomer 5 and 8 at a lower end of the evaporating section 5 the main communication pipe 4 is connected.

[0026] 在锅炉烟气系统尾部水平段或竖直段加装换热器下段即吸热段,吸热段的结构是多根并联的密闭管排束构件,当烟气通过吸热段的对流管束时,将烟气的热量传递给管内的循环水,烟气温度降低,而管内的循环水吸收热量后,温度升高并使一部分循环水蒸发为水蒸汽,水蒸汽沿上升管进入换热器的上段即放热段,蒸汽被穿过放热段管的加热水管内待加热的水冷却,凝结成水,沿下降管返回到换热器的吸热段中,从而使加热水管的冷水被加热后得到利用。 [0026] In the next paragraphs i.e. endothermic boiler flue system tail section of the horizontal segment or a vertical heat exchanger installation, configuration evaporating section is a plurality of sealed tube rows parallel beam member, when the flue gas by the endothermic section when convection bank, the flue gas heat to the water circulating in the pipe, the flue gas temperature is reduced, and the circulation water absorbs heat in the tube, the temperature rises and the water portion of the circulating water is evaporated to steam which rises along the tube into the transducer i.e., the upper heat radiating section, the steam is cooled through the water in the heating water heat pipe section to be heated, condenses into water, drop along the tube is returned to the evaporating section of the heat exchanger, thereby heating the pipe cold water after being heated utilized.

[0027] 放热段不仅仅用于加热水,还可根据实际生产需要,用于加热冷空气,与加热水的原理是一致的。 [0027] condensing section only for heating water, also according to the production requirements for heating cold air, and the water heating principles are the same.

[0028] 最后应说明的是:以上所述仅为本实用新型的优选实施例而已,并不用于限制本实用新型,尽管参照前述实施例对本实用新型进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。 [0028] Finally, it should be noted that: the above described features of the present invention it is preferred, but not to limit the present invention, although the embodiments with reference to the foregoing embodiments of the present invention has been described in detail, those skilled in the art for person, which can still technical solutions described in the foregoing modified embodiment, or some technical features equivalents. 凡在本实用新型的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本实用新型的保护范围之内。 Any modification within the spirit and principle of the invention, the, equivalent substitutions, improvements should be included within the scope of protection of the present invention.

Claims (1)

  1. 1.一种余热回收装置,其特征在于:所述余热回收装置分为上、下两部分; 所述的下部分为吸热段,设置在锅炉烟气系统尾部排放管道内,所述的吸热段设有若干排吸热金属管,每排吸热金属管的上下两端通过分连通管相连通,所述的分连通管的两端分别通过主连通管相连通,所述的吸热金属管内装有循环水; 所述的上部分为放热段,设置在锅炉烟气系统尾部排放管道外,一条加热水管穿过所述放热段,所述的放热段为密闭结构; 所述吸热段位于上端的主连通管通过上升管与所述的放热段相连;所述的放热段通过下降管与所述吸热段位于下端的主连通管相连。 A heat recovery unit, wherein: said heat recovery unit is divided into upper and lower parts; the lower portion of the evaporating section is disposed in the boiler flue gas exhaust system tail pipe, the suction heat absorbing section is provided with a plurality of rows of metal tubes, each row of upper and lower ends of the metal tube by absorbing sub communicating pipe communicates, at both ends of the communication pipe is divided respectively by a communicating tube communicating the main endothermic, the metal tube that has the circulating water; the upper part of the condensing section provided on an outer tail boiler flue gas exhaust duct system, a condensing section of the heating pipe passing through said heat sealed structure segment; the evaporating section at the upper end of said main communicating pipe is connected by the riser to said radiating section; the exothermic section through the downcomer pipe connected to the heat absorbing section at the lower end of the main communication.
CN 201220607547 2012-11-17 2012-11-17 Waste heat recovery device CN202927865U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104110670A (en) * 2014-07-22 2014-10-22 江苏双良锅炉有限公司 Horizontal fire tube boiler with tail provided with gas-water heat tube heat exchange tube
CN104697348A (en) * 2015-03-27 2015-06-10 沈阳鑫博工业技术股份有限公司 Device and method for recycling flue gas waste heat of roasting furnace
CN104712402A (en) * 2013-12-12 2015-06-17 霍特安热能技术(江苏)有限公司 Organic Rankine cycle power generation system using waste heat of engine exhaust
CN104713058A (en) * 2013-12-12 2015-06-17 霍特安热能技术(江苏)有限公司 Self-deoxidization waste heat boiler suitable for sulfur-containing fuel
CN105299676A (en) * 2015-09-16 2016-02-03 华北电力大学 Smoke moisture and waste heat recovery device based on hollow micro-nano porous ceramic membranes
CN105627282A (en) * 2014-10-30 2016-06-01 陕西桥上桥锅炉容器制造有限责任公司 Beer production boiler system for industrial boiler closed-circulation phase-change heat supply system
CN106247372A (en) * 2016-10-14 2016-12-21 杭州北高峰电力工程设计有限公司 Ozone denitration unpowered smoke cooler

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104713058B (en) * 2013-12-12 2017-05-24 霍特安热能技术(江苏)有限公司 A suitable sulfur-containing fuel to the furnace waste heat boiler from the deaerator
CN104712402A (en) * 2013-12-12 2015-06-17 霍特安热能技术(江苏)有限公司 Organic Rankine cycle power generation system using waste heat of engine exhaust
CN104713058A (en) * 2013-12-12 2015-06-17 霍特安热能技术(江苏)有限公司 Self-deoxidization waste heat boiler suitable for sulfur-containing fuel
CN104110670A (en) * 2014-07-22 2014-10-22 江苏双良锅炉有限公司 Horizontal fire tube boiler with tail provided with gas-water heat tube heat exchange tube
CN105627282A (en) * 2014-10-30 2016-06-01 陕西桥上桥锅炉容器制造有限责任公司 Beer production boiler system for industrial boiler closed-circulation phase-change heat supply system
CN104697348A (en) * 2015-03-27 2015-06-10 沈阳鑫博工业技术股份有限公司 Device and method for recycling flue gas waste heat of roasting furnace
CN105299676A (en) * 2015-09-16 2016-02-03 华北电力大学 Smoke moisture and waste heat recovery device based on hollow micro-nano porous ceramic membranes
CN106247372A (en) * 2016-10-14 2016-12-21 杭州北高峰电力工程设计有限公司 Ozone denitration unpowered smoke cooler
CN106247372B (en) * 2016-10-14 2018-03-30 浙江北高峰环境工程有限公司 Ozone denitration cooler smoke unpowered

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