WO2014044208A1 - Forced spiral finned coil condensation heat-supplying heat exchanger - Google Patents

Forced spiral finned coil condensation heat-supplying heat exchanger Download PDF

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Publication number
WO2014044208A1
WO2014044208A1 PCT/CN2013/083900 CN2013083900W WO2014044208A1 WO 2014044208 A1 WO2014044208 A1 WO 2014044208A1 CN 2013083900 W CN2013083900 W CN 2013083900W WO 2014044208 A1 WO2014044208 A1 WO 2014044208A1
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Prior art keywords
spiral
burner
heat exchanger
coil
coils
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PCT/CN2013/083900
Other languages
French (fr)
Chinese (zh)
Inventor
崔树庆
徐斌
范海源
Original Assignee
苏州成强换热器有限公司
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Priority to CN201210356371.4 priority Critical
Priority to CN201210356371.4A priority patent/CN102901225B/en
Application filed by 苏州成强换热器有限公司 filed Critical 苏州成强换热器有限公司
Publication of WO2014044208A1 publication Critical patent/WO2014044208A1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H8/00Fluid heaters having heat-generating means specially adapted for extracting latent heat from flue gases by means of condensation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H1/00Water heaters having heat generating means, e.g. boiler, flow- heater, water-storage heater
    • F24H1/18Water storage heaters
    • F24H1/186Water storage heaters using fluid fuel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H1/00Water heaters having heat generating means, e.g. boiler, flow- heater, water-storage heater
    • F24H1/22Water heaters other than continuous-flow or water storage heaters, e.g. water-heaters for central heating
    • F24H1/40Water heaters other than continuous-flow or water storage heaters, e.g. water-heaters for central heating with water tube or tubes
    • F24H1/43Water heaters other than continuous-flow or water storage heaters, e.g. water-heaters for central heating with water tube or tubes helically or spirally coiled
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H1/00Water heaters having heat generating means, e.g. boiler, flow- heater, water-storage heater
    • F24H1/22Water heaters other than continuous-flow or water storage heaters, e.g. water-heaters for central heating
    • F24H1/44Water heaters other than continuous-flow or water storage heaters, e.g. water-heaters for central heating with combinations of two or more of the types covered by groups F24H1/24 - F24H1/40, e.g. boilers having a combination of features covered by F24H1/24 - F24H1/40
    • F24H1/445Water heaters other than continuous-flow or water storage heaters, e.g. water-heaters for central heating with combinations of two or more of the types covered by groups F24H1/24 - F24H1/40, e.g. boilers having a combination of features covered by F24H1/24 - F24H1/40 with integrated flue gas condenser
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H9/00Details
    • F24H9/0005Details for water heaters
    • F24H9/001Guiding means
    • F24H9/0026Guiding means in combustion gas channels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H9/00Details
    • F24H9/0084Combustion air preheating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/022Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of two or more media in heat-exchange relationship being helically coiled, the coils having a cylindrical configuration
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/34Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
    • F28F1/36Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • 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
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]

Abstract

A forced spiral finned coil condensation heat-supplying heat exchanger, comprising a housing (3), and accommodated in the housing (3), a burner (6) and a plurality of spiral finned tube coils (8). The housing (3) has arranged thereon a water inlet (14), a water outlet (13), and an exhaust opening (12). The burner (6) is connected to an air and fuel gas intake apparatus. The burner (6) is arranged at the upper part of the housing (3). Spiral finned coil bundles (4) are coaxially installed around the burner (6). An exhaust pipe (15) consisting of the plurality of tightly arranged spiral finned coils (8) is arranged below the burner (6). The exhaust pipe (15) is emptied via the exhaust opening (12). The water inlet (14) is in communication with the plurality of tightly arranged spiral finned coils (8) below the burner (6). The plurality of tightly arranged spiral finned coils (8) below the burner (6) are in communication with the spiral finned coil bundles (4) around the burner (6). The spiral finned coil bundles (4) around the burner (6) are in communication with the water outlet (13). The heat exchanger enhances the heat exchange at the flue gas side, while at the same time allows for further reduction in the overall size of the heat exchanger.

Description

一种强制螺旋翅片盘管冷凝供热换热器 技术领域  Forced spiral fin coil condensing heat supply heat exchanger

本发明属于热工设备领域, 具体是涉及一种强制螺旋翅片盘管冷凝供热换 热器。  The invention belongs to the field of thermal equipment, and in particular relates to a forced spiral fin coil condensing heating heat exchanger.

背景技术 Background technique

早在 20世纪中东石油危机之后, 为节约能源, 在欧洲便研制出了高热效 率的冷凝式锅炉, 其显著特点是热效率比常规设计锅炉提高 1 0%以上。 由于使 锅炉的排烟温度降低到露点以上, 烟气中大量水蒸汽冷凝并释放出汽化潜热, 具有明显的节能效果, 运用到冷凝式锅炉中的冷凝式换热器就是根据其原理研 制而成。  As early as the oil crisis in the Middle East in the 20th century, in order to save energy, a highly heat-efficient condensing boiler was developed in Europe, which is characterized by a thermal efficiency increase of more than 10% compared with conventional design boilers. Since the exhaust temperature of the boiler is lowered to above the dew point, a large amount of water vapor in the flue gas condenses and releases latent heat of vaporization, which has obvious energy-saving effect, and the condensing heat exchanger applied to the condensing boiler is developed according to the principle thereof. .

燃气燃烧可供利用的热量包括烟气的显热和烟气中水蒸汽的潜热两部分。 普通型换热器受其结构的限制, 排烟温度高, 只能利用燃气的低热值部分; 冷 凝式换热器由于排烟温度很低, 不仅能够充分吸收烟气的显热还能吸收潜热, 利用的是烟气的高热值。 因此, 冷凝式换热器的热能利用效率可以大大提高。 为了充分吸收高温烟气的热量及收集凝结水, 其一般采用二次换热方式, 工作 时, 高温烟气依次由下至上进入显热换热器和冷凝段换热器, 而水流方向正好 相反, 先经过冷凝段换热器, 冷水在冷凝段换热器吸收高温烟气余热后, 再进 入主换热器吸收火焰显热。换热器吸收显热和潜热后烟气温度将降至常温, 由 上部烟道排出, 为了安全可靠的排出烟气, 冷凝式换热器采用强制排烟的方式 排出烟气, 使得烟气中的水蒸汽尽可能多的凝结, 这就使被加热的水吸收的潜 热量和显热量就越多, 其节能效果就越好。故冷凝式换热器利用了作为排烟损 失掉的热量, 把排烟热损失变为了有用的热, 这部分热量有效利用的程度决定 了冷凝式换热器的节能效果。  The heat available for gas combustion includes the sensible heat of the flue gas and the latent heat of the water vapor in the flue gas. The ordinary heat exchanger is limited by its structure, and the exhaust gas temperature is high, and only the low calorific value of the gas can be utilized; the condensing heat exchanger can not only fully absorb the sensible heat of the flue gas but also absorb the latent heat due to the low exhaust gas temperature. , using the high calorific value of the flue gas. Therefore, the heat utilization efficiency of the condensing heat exchanger can be greatly improved. In order to fully absorb the heat of the high-temperature flue gas and collect the condensed water, it generally adopts the secondary heat exchange mode. When working, the high-temperature flue gas enters the sensible heat exchanger and the condensing section heat exchanger from bottom to top in turn, and the water flow direction is opposite. First, the heat exchanger of the condensation section is passed through, and the cold water absorbs the residual heat of the high-temperature flue gas in the heat exchanger of the condensation section, and then enters the main heat exchanger to absorb the sensible heat of the flame. After the heat exchanger absorbs sensible heat and latent heat, the flue gas temperature will drop to normal temperature and be discharged from the upper flue. In order to discharge the flue gas safely and reliably, the condensing heat exchanger uses forced exhaust to exhaust the flue gas, so that the flue gas is in the flue gas. The water vapor condenses as much as possible, which increases the amount of latent heat and sensible heat absorbed by the heated water, and the better the energy saving effect. Therefore, the condensing heat exchanger utilizes the heat lost as a smoke exhaust, and the heat loss of the exhaust gas becomes useful heat. The degree of effective utilization of this part of heat determines the energy saving effect of the condensing heat exchanger.

然而, 进入冷凝换热器的烟气一般呈过热状态, 随着烟气温度的降低和水 蒸气的冷凝, 烟气逐渐向饱和状态过渡, 最后达到饱和状态。 根据实验测定, 当排烟温度在 50 ° C左右, 冷凝换热器烟气出口状态是接近于饱和状态, 接近 的程度与烟气的组分、 换热器结构和传热传质过程有关。 实验数据显示, 现有 技术中, 烟气的流动路径仍存在不少 "死区 "现象或 "短路"状态, 降低了换 热效率。 1. 传统非冷凝锅炉的供热换热器由碳钢或铸铁制成, 在设计时的排烟温 度一般都高于 150°C, 不考虑吸收烟气中水蒸气冷凝所释放大量显热和潜热, 没有冷凝水产生。 However, the flue gas entering the condensing heat exchanger is generally in a superheated state. As the flue gas temperature decreases and the water vapor condenses, the flue gas gradually transitions to a saturated state and finally reaches a saturated state. According to the experimental measurement, when the exhaust gas temperature is about 50 ° C, the flue gas outlet state of the condensing heat exchanger is close to saturation state, and the degree of proximity is related to the composition of the flue gas, the heat exchanger structure and the heat and mass transfer process. Experimental data shows that in the prior art, there are still many "dead zone" phenomena or "short circuit" states in the flow path of the flue gas, which reduces the heat exchange efficiency. 1. The heating heat exchanger of the traditional non-condensing boiler is made of carbon steel or cast iron. The exhaust temperature of the design is generally higher than 150 °C, and the large amount of sensible heat released by the condensation of water vapor in the absorption flue gas is not considered. Latent heat, no condensation produced.

2. 冷凝锅炉具有高效节能环保的特点, 是锅炉行业的发展方向并得到广 泛的推广。 冷凝锅炉由于产生了大量弱酸性冷凝水, 如果使用常用的钢板或铸 铁等材料制造冷凝锅炉供热换热器将严重缩短冷凝锅炉的寿命, 所以冷凝锅炉 供热换热器必须使用不锈钢或铸铝加工制成。 目前, 多采用不锈钢光管或铸铝 制成。  2. Condensing boilers are characterized by high efficiency, energy saving and environmental protection. They are the development direction of the boiler industry and have been widely promoted. Condensing boilers generate a large amount of weakly acidic condensate. If the condensing boiler heating heat exchanger is made of materials such as steel or cast iron, the life of the condensing boiler will be seriously shortened. Therefore, the condensing boiler heating heat exchanger must use stainless steel or cast aluminum. Processed. At present, it is mostly made of stainless steel light pipe or cast aluminum.

3. 用铸铝模具加工换热器的技术已基本成熟, 但只能制作 500KW 多的供 热换热器。 大型铸铝件存在模具成本高, 加工工艺复杂, 产品报废率高的问题, 使得无法用铸铝模具直接加工大型供热换热器。  3. The technology for processing heat exchangers with cast aluminum molds is basically mature, but only 500 kW heating heat exchangers can be produced. The large-scale cast aluminum parts have the problems of high mold cost, complicated processing technology and high product scrap rate, which makes it impossible to directly process large-scale heat supply heat exchangers with cast aluminum molds.

4. 这两种换热器在通常的情况下, 热效率最多可达 96%左右。  4. The heat efficiency of these two heat exchangers is up to 96% under normal conditions.

5. 当锅炉的回水温度高于 60°C, 锅炉将不产生冷凝水。 这时换热器只能 回收烟气中的显热, 热效率也只有 87%左右。  5. When the return water temperature of the boiler is higher than 60 °C, the boiler will not produce condensed water. At this time, the heat exchanger can only recover the sensible heat in the flue gas, and the thermal efficiency is only about 87%.

6. 空气预热器一般在电站等大型锅炉中采用。在供热锅炉中还没有采用。 6. Air preheaters are generally used in large boilers such as power stations. Not used in heating boilers.

7. 传统的供热换热器根据客户不同的需求来设计制造大小不同的供热换 热器, 换热器大小不同, 所需零部件也不同, 不利于工业化批量生产。 7. Conventional heating heat exchangers are designed to produce different types of heating heat exchangers according to different needs of customers. The heat exchangers are different in size and the required parts are different, which is not conducive to industrial mass production.

发明内容 Summary of the invention

鉴于上述现有技术存在的问题, 提出了本发明。  The present invention has been made in view of the problems of the prior art described above.

因此, 本发明要解决的技术问题是, 如何克服现有技术中换热器结构设计 不足导致烟气流动路径换热不充分的问题,如何改进传热面结构以达到增大换 热面积提高换热效率的目的, 同时使得锅炉在同等功率下可以做得更小, 占用 更小的体积,以及如何将空气预热器巧妙的结合到换热器中, 从而进行二次换 热, 提高空气进入的初始温度的同时进一步降低排烟温度。  Therefore, the technical problem to be solved by the present invention is how to overcome the problem that the heat exchanger structure in the prior art is insufficient to cause insufficient heat exchange of the flue gas flow path, and how to improve the heat transfer surface structure to increase the heat exchange area and increase the heat exchange area. The purpose of thermal efficiency, at the same time, allows the boiler to be made smaller at the same power, taking up less volume, and how to intimately combine the air preheater into the heat exchanger for secondary heat transfer and air intake. The initial temperature is further reduced by the exhaust gas temperature.

为解决上述技术问题, 本发明提供了如下技术方案: 一种强制螺旋翅片盘 管冷凝供热换热器,包括壳体,设置于壳体内的燃烧器与复数个螺旋翅片盘管, 壳体上设置有进水口、 出水口及排烟口, 燃烧器与空气及燃气进气装置连接, 燃烧器位于壳体上部, 燃烧器周围同轴安装有一组复数个螺旋翅片盘管管束, 燃烧器下方设置有由复数个紧密排列螺旋翅片盘管组成的排烟管道,排烟管道 通过排烟口排空; 进水口与燃烧器下方复数个紧密排列螺旋翅片盘管连通, 燃 烧器下方复数个紧密排列螺旋翅片盘管与燃烧器周围的螺旋翅片盘管连通, 燃 烧器周围的螺旋翅片盘管与出水口连通。 In order to solve the above technical problem, the present invention provides the following technical solution: A forced spiral fin coil condensing heat supply heat exchanger, comprising a casing, a burner disposed in the casing and a plurality of spiral fin coils, a shell The body is provided with a water inlet, a water outlet and a smoke exhaust port, and the burner is connected with the air and gas inlet device, the burner is located at the upper part of the casing, and a plurality of spiral finned coil tube bundles are coaxially mounted around the burner, and the combustion is performed. A smoke exhaust pipe composed of a plurality of tightly arranged spiral finned coils is disposed under the device, and the exhaust pipe is exhausted through the exhaust port; the water inlet is connected with a plurality of closely arranged spiral fin coils under the burner, and the fuel is connected. A plurality of closely arranged spiral fin coils are connected to the spiral fin coils around the burner under the burner, and the spiral fin coils around the burner are connected to the water outlet.

作为本发明所述的强制螺旋翅片盘管冷凝供热换热器的一种优选方案, 其 中:对所述螺旋翅片盘管管束及所述复数个紧密排列螺旋翅片盘管相邻的翅片 进行折弯或挤压处理, 螺旋翅片盘管两侧翅片呈一定角度内折, 翅片管所形成 的两个内折面是平行的或呈现一定角度。  A preferred embodiment of the forced spiral fin coil condensing heat supply heat exchanger according to the present invention, wherein: the spiral finned coil bundle and the plurality of closely arranged spiral fin coils are adjacent The fins are bent or extruded, and the fins on both sides of the spiral fin coil are folded at an angle, and the two inner folds formed by the finned tubes are parallel or at a certain angle.

作为本发明所述的强制螺旋翅片盘管冷凝供热换热器的一种优选方案, 其 中:所述螺旋翅片盘管管束以及所述复数个紧密排列螺旋翅片盘管都由复数个 螺旋翅片盘管上下倒置贴合组成。  A preferred embodiment of the forced spiral fin coil condensing heat supply heat exchanger according to the present invention, wherein: the spiral fin coil tube bundle and the plurality of closely arranged spiral fin coils are composed of a plurality of The spiral fin coils are assembled upside down.

作为本发明所述的强制螺旋翅片盘管冷凝供热换热器的一种优选方案, 其 中: 所述螺旋翅片盘管管束的外侧设置有外导流板。  As a preferred embodiment of the forced spiral fin coil condensing heat supply heat exchanger of the present invention, wherein: the outer side of the spiral finned coil bundle is provided with an outer deflector.

作为本发明所述的强制螺旋翅片盘管冷凝供热换热器的一种优选方案, 其 中: 所述外导流板为 "V" 型螺旋状导流板, 与螺旋翅片盘管外侧贴合, 紧密 排列的螺旋翅片盘管的相邻处与外导流板的导流口相互错开。  As a preferred embodiment of the forced spiral fin coil condensing heat supply heat exchanger of the present invention, wherein: the outer deflector is a "V" type spiral baffle, and the outer side of the spiral fin coil The adjacent portions of the tightly arranged spiral fin coils are offset from the flow guiding ports of the outer deflector.

作为本发明所述的强制螺旋翅片盘管冷凝供热换热器的一种优选方案, 其 中:所述燃烧器下方组成排烟管道的复数个紧密排列螺旋翅片盘管的内侧设置 有内导流板。  A preferred embodiment of the forced spiral fin coil condenser heat supply heat exchanger according to the present invention, wherein: a plurality of tightly arranged spiral fin coils constituting the exhaust duct below the burner are disposed inside Deflector.

作为本发明所述的强制螺旋翅片盘管冷凝供热换热器的一种优选方案, 其 中: 所述内导流板为其上附有多个孔和 /或缝的圆筒状导流板, 与螺旋翅片盘 管内侧贴合, 复数个紧密排列螺旋翅片盘管的相邻处与内导流板的导流口相互 错开。  As a preferred embodiment of the forced spiral fin coil condensing heat supply heat exchanger of the present invention, wherein: the inner baffle is a cylindrical diversion tube with a plurality of holes and/or slits attached thereto The plate is attached to the inner side of the spiral fin coil, and the adjacent portions of the plurality of tightly arranged spiral fin coils are offset from the inner flow guides of the inner deflector.

作为本发明所述的强制螺旋翅片盘管冷凝供热换热器的一种优选方案, 其 中: 所述排烟管道内设置有空气预热器; 所述空气预热器穿过排烟管道与空气 进气装置连接; 所述排烟口为四通式排烟口, 其上端为排烟口, 其下端为冷凝 水出口, 中部为空气预热器的空气进口。  As a preferred embodiment of the forced spiral fin coil condensing heat supply heat exchanger of the present invention, wherein: the exhaust pipe is provided with an air preheater; the air preheater passes through the exhaust pipe The air outlet is connected to the air intake device; the exhaust port is a four-type exhaust port, the upper end of which is a smoke exhaust port, the lower end of which is a condensate outlet, and the middle part is an air inlet of the air preheater.

作为本发明所述的强制螺旋翅片盘管冷凝供热换热器的一种优选方案, 其 中: 所述排烟管道内的空气预热器为一根或多根长方体或圆柱形空气进气管。  As a preferred embodiment of the forced spiral fin coil condensing heat supply heat exchanger of the present invention, wherein: the air preheater in the exhaust pipe is one or more rectangular or cylindrical air intake pipes .

作为本发明所述的强制螺旋翅片盘管冷凝供热换热器的一种优选方案, 其 中: 燃烧器位于壳体下部, 燃烧器周围同轴安装有一组由复数个翅片直管紧密 圆周均布的螺旋翅片盘管管束, 燃烧器上方设置有由复数个紧密排列螺旋翅片 盘管组成的排烟管道, 排烟管道通过排烟口排空; 进水口与燃烧器上方复数个 紧密排列螺旋翅片盘管连通, 燃烧器上方复数个紧密排列螺旋翅片盘管与燃烧 器周围的螺旋翅片盘管连通, 燃烧器周围的螺旋翅片盘管与出水口连通。 As a preferred embodiment of the forced spiral fin coil condensing heat supply heat exchanger of the present invention, wherein: the burner is located at the lower part of the casing, and a plurality of fins are tightly mounted around the burner coaxially around the burner. a uniformly distributed spiral finned coil bundle with a plurality of closely arranged spiral fins disposed above the burner a smoke exhaust pipe composed of coils, the exhaust pipe is exhausted through the exhaust port; the water inlet is connected with a plurality of closely arranged spiral fin coils above the burner, and a plurality of tightly arranged spiral fin coils and burners are arranged above the burner The surrounding spiral fin coils are connected, and the spiral fin coils around the burner are in communication with the water outlet.

采用本发明所述技术方案, 具有如下有益技术效果:  By adopting the technical solution of the present invention, the following beneficial technical effects are obtained:

本发明的整体结构布置能够提高换热效率。本发明采用了燃烧器设置在上 方, 排烟口设置在下方的二级逆流换热布置结构, 燃烧器燃烧后的烟气从换热 器上方向下流动, 先穿过燃烧器周围翅片管以及外导流板, 然后穿过排烟管道 的翅片管与内导流板, 沿着排烟管道, 逆流至排烟口排空。 而进水口设置在下 部排烟口处, 出水口设置在换热器上部, 水通过进水口、 翅片管, 换热器两端 连接上下翅片管束的腔体, 例如可以是上水母管和下水母管, 最终通过出水口 排出。 采取逆流的换热方式,水的出口温度才更有可能高于排烟温度, 可以大 大提高换热效率, 增大换热量。  The overall structural arrangement of the present invention can increase heat exchange efficiency. The invention adopts a two-stage counterflow heat exchange arrangement structure in which a burner is arranged above and a smoke exhaust port is arranged below, and the flue gas after combustion of the burner flows downward from above the heat exchanger, first passing through the fin tube around the burner. And the outer deflector, then pass through the finned tube and the inner deflector of the exhaust pipe, along the exhaust pipe, and flow back to the exhaust port. The water inlet is arranged at the lower exhaust port, the water outlet is arranged at the upper part of the heat exchanger, the water passes through the water inlet and the fin tube, and the two ends of the heat exchanger are connected to the cavity of the upper and lower finned tube bundle, for example, the upper water main pipe and The lower water main pipe is finally discharged through the water outlet. By adopting the reverse flow heat exchange mode, the water outlet temperature is more likely to be higher than the exhaust gas temperature, which can greatly improve the heat exchange efficiency and increase the heat exchange amount.

本发明二次加工后的翅片管能够显著提高换热效率。本发明采用螺旋翅片 盘管作为强制螺旋翅片盘管冷凝供热换热器的基本元件, 在换热管的表面通过 加翅片, 增大换热管的外表面积从而达到提高换热效率的目的, 强化了烟气侧 的换热, 可使整个换热器体积进一步减少。 通过对翅片进行二次加工, 例如折 弯或挤压, 使得翅片管的光管之间间距明显减少, 从而使得烟气流与光管进行 更充分地接触冲刷, 增强换热, 提高紊流脉动程度, 增大对流换热系数, 有效 地达到增强传热的目的,提高了换热效率, 同时使整个换热器体积进一步减少。  The fin tube after the secondary processing of the present invention can significantly improve the heat exchange efficiency. The invention adopts a spiral finned coil as a basic component of a forced spiral fin coil condensing heat supply heat exchanger, and increases the heat exchange efficiency by adding fins on the surface of the heat exchange tube to increase the outer surface area of the heat exchange tube. The purpose is to enhance the heat exchange on the flue gas side, which can further reduce the volume of the entire heat exchanger. By subjecting the fins to secondary processing, such as bending or extrusion, the spacing between the tubes of the finned tubes is significantly reduced, thereby allowing the flue gas stream to more fully contact the light pipe, enhancing heat transfer and improving turbulence. The degree of flow pulsation increases the convective heat transfer coefficient, effectively achieves the purpose of enhancing heat transfer, improves the heat exchange efficiency, and further reduces the volume of the entire heat exchanger.

本发明设置有外、 内导流板, 有利于减小烟气流的 "死区", 进一步改善 壳程流体流速分布。 本发明中, 通过增加若干位于圆周翅片管束外侧和外壳之 间的外导流板和位于排烟管道翅片管内侧的内导流板, 使得烟气的流动路径紧 贴翅片及光管, 能够进一步加强换热, 明显改善壳程流体流速分布, 减小烟气 流的 "死区" 或 "短路"。  The invention is provided with an outer and inner deflector, which is beneficial for reducing the "dead zone" of the flue gas flow and further improving the shell flow velocity distribution. In the present invention, the flow path of the flue gas is closely attached to the fins and the light pipe by adding a plurality of outer baffles located outside the outer circumference of the circumferential finned tube bundle and the inner deflector located inside the finned tube of the exhaust duct. It can further enhance heat transfer, significantly improve the shell flow velocity distribution, and reduce the "dead zone" or "short circuit" of the flue gas stream.

本发明进一步的设置有空气预热器, 可以提高效率。 本发明中, 空气预热 器巧妙地结合设置在换热器的排气管道中, 当在冬天室外空气达到 -20°C以下, 利用烟气余热提高进入炉膛的空气温度, 进一步降低排烟温度, 使得效率达到 98%以上, 具有明显效果。  The present invention is further provided with an air preheater to improve efficiency. In the present invention, the air preheater is skillfully combined in the exhaust duct of the heat exchanger. When the outdoor air reaches below -20 °C in winter, the residual heat of the flue gas is used to increase the temperature of the air entering the furnace, thereby further reducing the exhaust temperature. , the efficiency is above 98%, with obvious effect.

附图说明 DRAWINGS

图 1是根据本发明一个实施例所述强制螺旋翅片盘管冷凝供热换热器的主 体示意图。 1 is a main body of a forced spiral finned coil condensing heat supply heat exchanger according to an embodiment of the present invention. Body diagram.

图 2是本发明所述强制螺旋翅片盘管冷凝供热换热器的立体示意图。  2 is a perspective view of the forced spiral fin coil condenser heat supply heat exchanger of the present invention.

图 3是本发明一个实施例中强制螺旋翅片盘管冷凝供热换热器的结构剖视 及工作原理示意图。  Fig. 3 is a cross-sectional view showing the structure and working principle of a forced spiral finned coil condensing heat supply heat exchanger according to an embodiment of the present invention.

图 4是本发明所述带有一个空气预热器的强制螺旋翅片盘管冷凝供热换热 器的结构的右视剖视图。  Figure 4 is a right side cross-sectional view showing the structure of a forced spiral fin coil condenser heat supply heat exchanger with an air preheater according to the present invention.

图 5是本发明一个实施例中空气预热器位于上方时的强制螺旋翅片盘管冷 凝供热换热器右视剖视图。  Figure 5 is a right side cross-sectional view of the forced spiral fin coil condensing heat supply heat exchanger with the air preheater positioned above in an embodiment of the present invention.

图 6是本发明所述若干个螺旋翅片盘管紧密排列组成的螺旋翅片盘管管束 示意图。  Fig. 6 is a schematic view showing a spiral finned coiled tube bundle in which a plurality of spiral finned coils are closely arranged according to the present invention.

图 7是本发明所述螺旋翅片盘管管束主视示意图。  Figure 7 is a front elevational view of the spiral finned coil tube bundle of the present invention.

图 8是图 7A-A向剖视示意图。  Figure 8 is a cross-sectional view taken along line 7A-A.

图 9是图 8的 B向放大示意图。  Fig. 9 is an enlarged schematic view showing the direction B of Fig. 8.

图 10是烟气过外导流板的工作原理示意图。  Fig. 10 is a schematic view showing the working principle of the flue gas passing through the outer deflector.

图 1 1是烟气过内导流板的工作原理示意图。  Figure 1 is a schematic diagram of the working principle of the flue gas passing through the deflector.

图 12是本发明再一个实施例中带有两个空气预热器的强制螺旋翅片盘管 冷凝供热换热器的右视结构示意图。  Figure 12 is a schematic right side elevational view of a forced spiral finned coil condensing heat supply heat exchanger with two air preheaters in accordance with still another embodiment of the present invention.

具体实施方式 detailed description

下面详细描述本发明的实施例, 所述实施例的示例在附图中示出, 其仅用 于解释本发明, 而不能理解为对本发明的限制。  The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the accompanying drawings, which are merely used to explain the present invention and are not to be construed as limiting.

如图 1〜图 12所示, 其中包括: 上水母管 1、 前挡板 2、 壳体 3、 螺旋翅片 盘管管束 4、 外导流板 5、 燃烧器 6、 内导流板 7、 复数个紧密排列螺旋翅片盘 管 8、 下水母管 9、 后挡板 10、 空气预热器 1 1、 排烟口 12、 出水口 13、 进水 口 14、 排烟管道 15、 冷凝水出口 16、 空气进口 17。  As shown in FIG. 1 to FIG. 12, the method includes: an upper water main pipe 1, a front baffle 2, a casing 3, a spiral finned coil bundle 4, an outer baffle 5, a burner 6, and an inner baffle 7, a plurality of tightly arranged spiral fin coils 8, a lower water main pipe 9, a tailgate 10, an air preheater 1 1, a smoke exhaust port 12, a water outlet 13, a water inlet 14, a smoke exhaust pipe 15, and a condensed water outlet 16 , air inlet 17.

参考图 1〜图 4描述本发明一个实施例的强制螺旋翅片盘管冷凝供热换热 器。 如图 1、 图 2、 图 3及图 4所示, 一种强制螺旋翅片盘管冷凝供热换热器, 包括壳体 3、 燃烧器 6以及螺旋翅片盘管管束 4和复数个紧密排列螺旋翅片盘 管 8, 在所述壳体 3两侧各设置有一组上水母管 1 以及下水母管 9, 其中一侧 的上水母管 1和下水母管 9连通, 另一侧的下水母管 9安装进水口 14, 而上水 母管 1 则安装出水口 13。 多个螺旋翅片盘管上下倒置贴合组成一组。 燃烧器 6 周围设置有螺旋翅片盘管管束 4。 燃烧器 6下方设置有由复数个紧密排列螺旋 翅片盘管 8组成的排烟管道 15。 A forced spiral fin coil condensing heat supply heat exchanger according to an embodiment of the present invention will be described with reference to Figs. As shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 4, a forced spiral fin coil condensing heat supply heat exchanger comprises a casing 3, a burner 6 and a spiral finned coil bundle 4 and a plurality of tight The spiral fin coils 8 are arranged, and a set of upper water main pipe 1 and a lower water main pipe 9 are disposed on both sides of the casing 3, wherein one side of the upper water main pipe 1 and the lower water main pipe 9 are connected, and the other side is lower. The jellyfish tube 9 is fitted with a water inlet 14, and the upper water mother tube 1 is provided with a water outlet 13. A plurality of spiral fin coils are placed upside down and assembled into a group. Burner 6 A spiral finned coil bundle 4 is disposed around. Below the burner 6, there is disposed a smoke exhaust duct 15 composed of a plurality of closely arranged spiral fin coils 8.

所述侧外壳两端内侧安装有前挡板 2 和后挡板 10, 且侧外壳与前挡板 2 和后挡板 10焊接固定。 在一种实施方式中, 所述前挡板 2和后挡板 10皆采用 保温材料制成。  A front baffle 2 and a tailgate 10 are mounted on both inner sides of the side casing, and the side casing is welded and fixed to the front baffle 2 and the tailgate 10. In one embodiment, the front baffle 2 and the tailgate 10 are all made of an insulating material.

如图中所示, 换热器壳体 3上附有出水口 13和进水口 14。 壳体 3上还设 置有排烟口 12, 所述排烟口 12为四通式排烟口 12, 其上端为排烟口 12, 其下 端为冷凝水出口 16, 中部为空气预热器 1 1 的空气进口 17。  As shown in the figure, the heat exchanger housing 3 is provided with a water outlet 13 and a water inlet 14. The casing 3 is further provided with a smoke exhaust port 12, wherein the smoke exhaust port 12 is a four-type exhaust port 12, the upper end of which is a smoke exhaust port 12, the lower end of which is a condensate outlet 16 and the middle part of which is an air preheater 1 1 air inlet 17.

如图 3所示, 图 3为本发明一个实施例中强制螺旋翅片盘管冷凝供热换热 器的结构剖视及工作原理示意图。 在该实施例中, 该强制螺旋翅片盘管冷凝供 热换热器, 包括壳体 3, 设置于壳体 3内的燃烧器 6与复数个螺旋翅片盘管, 壳体 3上设置有进水口 14、 出水口 13及排烟口 12, 燃烧器 6与空气及燃气进 气装置连接, 燃烧器 6位于壳体 3上部, 燃烧器 6周围同轴安装有螺旋翅片盘 管管束 4, 所述螺旋翅片盘管管束 4的外侧设置有外导流板 5, 该外导流板 5 为 " V" 型螺旋状导流板, 与螺旋翅片盘管外侧贴合, 紧密排列的螺旋翅片盘 管的相邻处与外导流板 5的导流口相互错开;燃烧器 6下方设置有由复数个紧 密排列螺旋翅片盘管 8组成的排烟管道 15, 排烟管道 15通过排烟口 12排空; 所述排烟管道 15 内设置有包含有一根或多根长方体或圆柱形空气进气管的空 气预热器 1 1,该空气预热器 1 1 为进气管;所述进水口 14与燃烧器 6下方复数 个紧密排列螺旋翅片盘管 8连通, 燃烧器 6下方复数个紧密排列螺旋翅片盘管 8与燃烧器 6周围的螺旋翅片盘管连通, 燃烧器 6周围的螺旋翅片盘管与出水 口 13连通。  As shown in FIG. 3, FIG. 3 is a cross-sectional view showing the structure and working principle of a forced spiral finned coil condensing heat supply heat exchanger according to an embodiment of the present invention. In this embodiment, the forced spiral fin coil condensing heat supply heat exchanger comprises a casing 3, a burner 6 disposed in the casing 3 and a plurality of spiral fin coils, and the casing 3 is provided with The water inlet 14, the water outlet 13 and the smoke exhaust port 12, the burner 6 is connected to the air and gas inlet device, the burner 6 is located at the upper part of the casing 3, and the spiral finned coil bundle 4 is coaxially mounted around the burner 6. An outer baffle 5 is disposed on an outer side of the spiral finned coil bundle 4, and the outer baffle 5 is a "V"-shaped spiral baffle, which is attached to the outer side of the spiral finned coil, and closely arranged spirals The adjacent portions of the fin coils are offset from the flow guiding ports of the outer deflector 5; below the burner 6, a exhaust duct 15 composed of a plurality of closely arranged spiral fin coils 8 is disposed, and the exhaust duct 15 passes The exhaust port 12 is evacuated; the exhaust pipe 15 is provided with an air preheater 1 1 including one or more rectangular parallelepiped or cylindrical air intake pipes, and the air preheater 1 1 is an intake pipe; a plurality of closely arranged spiral fin disks under the water inlet 14 and the burner 6 The tube 8 is connected, and a plurality of closely arranged spiral fin coils 8 under the burner 6 are in communication with the spiral fin coils around the burner 6, and the spiral fin coils around the burner 6 are in communication with the water outlet 13.

在所述燃烧器 6下方组成排烟管道 15的复数个紧密排列螺旋翅片盘管 8 的内侧设置有内导流板 7,所述内导流板 7为其上附有多个孔和 /或缝的圆筒状 导流板, 与螺旋翅片盘管内侧贴合, 复数个紧密排列螺旋翅片盘管 8的相邻处 与内导流板 7的导流口相互错开。  An inner deflector 7 is disposed inside the plurality of closely arranged spiral fin coils 8 constituting the exhaust duct 15 below the burner 6, and the inner deflector 7 is provided with a plurality of holes and/or Or a slit cylindrical baffle is attached to the inner side of the spiral fin coil, and the adjacent portions of the plurality of tightly arranged spiral fin coils 8 are offset from the flow guiding ports of the inner deflector 7.

所述空气预热器 1 1 穿过排烟管道 15与空气进气装置连接;所述排烟口 12 为四通式排烟口 12, 其上端为排烟口 12, 其下端为冷凝水出口 16, 中部为空 气预热器 1 1 的空气进口 17。  The air preheater 1 1 is connected to the air intake device through the exhaust pipe 15; the exhaust port 12 is a four-type exhaust port 12, the upper end of which is a smoke exhaust port 12, and the lower end of which is a condensate outlet 16, the middle is the air inlet 17 of the air preheater 1 1 .

如图 4所示, 图 4为本发明所述带有一个空气预热器的强制螺旋翅片盘管 冷凝供热换热器的结构的右视剖视图。 由此工作原理图可以清晰的了解到, 螺 旋翅片盘管管束 4位于复数个紧密排列螺旋翅片盘管 8的上方, 螺旋翅片盘管 管束 4和复数个紧密排列螺旋翅片盘管 8相平行。所述燃烧器 6同轴安装于螺 旋翅片盘管管束 4内, 燃烧器 6与空气及燃气进气装置连接。 燃烧器 6下方设 置有由复数个紧密排列螺旋翅片盘管 8组成的排烟管道 15。 As shown in FIG. 4, FIG. 4 is a forced spiral fin coil with an air preheater according to the present invention. A right side cross-sectional view of the structure of the condensing heat exchanger. From this working principle diagram, it can be clearly understood that the spiral finned coil bundle 4 is located above a plurality of closely arranged spiral fin coils 8, a spiral finned coil bundle 4 and a plurality of closely arranged spiral finned coils 8 Parallel. The burner 6 is coaxially mounted in the spiral finned coil bundle 4, and the burner 6 is connected to the air and gas inlet means. Below the burner 6, there is disposed a smoke exhaust duct 15 composed of a plurality of closely arranged spiral fin coils 8.

本发明采用二次换热方式, 采用逆流布置换热, 高温烟气由上至下经过螺 旋翅片盘管管束 4、 复数个紧密排列螺旋翅片盘管 8 ; 而水流方向正好相反, 先经过复数个紧密排列螺旋翅片盘管 8, 再经过螺旋翅片盘管管束 4。 空气预 热器 1 1设置在排烟管道 15内, 可以与烟气进行换热, 由此提高进入炉膛的空 气温度而同时进一步降低排烟温度。  The invention adopts a secondary heat exchange mode, adopts a reverse flow arrangement heat exchange, and the high temperature flue gas passes through the spiral finned coil bundle 4 from the top to the bottom, and a plurality of tightly arranged spiral fin coils 8; and the water flow direction is opposite, first pass A plurality of closely arranged spiral fin coils 8 are passed through the spiral finned coil bundle 4. The air preheater 1 1 is disposed in the exhaust duct 15 to exchange heat with the flue gas, thereby increasing the air temperature entering the furnace while further reducing the exhaust gas temperature.

在该实施例中, 进水口 14、 复数个紧密排列螺旋翅片盘管 8、 上水母管 1、 螺旋翅片盘管管束 4、 下水母管 9、 出水口 13, 构成水加热过程的回路。  In this embodiment, the water inlet port 14, a plurality of closely arranged spiral fin coils 8, the upper water mother pipe 1, the spiral fin coil pipe bundle 4, the lower water mother pipe 9, and the water outlet 13, constitute a circuit for the water heating process.

如图 5所示, 图 5为本发明一个实施例中空气预热器位于上方时的强制螺 旋翅片盘管冷凝供热换热器右视剖视图。 在该实施例中, 燃烧器 6位于壳体 3 下部, 燃烧器 6周围同轴安装有一组由复数个翅片直管紧密圆周均布的螺旋翅 片盘管管束 4, 燃烧器 6上方设置有由壳体 3与复数个紧密排列螺旋翅片盘管 8组成的排烟管道 15,排烟管道 15通过排烟口 12排空;进水口 14与燃烧器 6 上方复数个紧密排列螺旋翅片盘管 8连通, 燃烧器 6上方复数个紧密排列螺旋 翅片盘管 8与燃烧器 6周围的螺旋翅片盘管连通, 燃烧器 6周围的螺旋翅片盘 管与出水口 13连通。  As shown in Fig. 5, Fig. 5 is a right side sectional view showing the forced-screw-coil condensing heat supply heat exchanger when the air preheater is located above in the embodiment of the present invention. In this embodiment, the burner 6 is located at the lower portion of the casing 3, and a set of spiral finned coil bundles 4 uniformly surrounded by a plurality of fin straight tubes is coaxially mounted around the burner 6, and the burner 6 is disposed above the burner 6. a smoke exhaust pipe 15 composed of a casing 3 and a plurality of closely arranged spiral fin coils 8, the exhaust pipe 15 is evacuated through the exhaust port 12; the water inlet 14 and the burner 6 are arranged in a plurality of tightly arranged spiral fin disks The tube 8 is connected, and a plurality of closely arranged spiral fin coils 8 are connected to the spiral fin coils around the burner 6 above the burner 6, and the spiral fin coils around the burner 6 are in communication with the water outlet 13.

此时, 采用逆流布置高温烟气由下至上经过一级显热换热和二级冷凝换 热; 而水流方向正好相反, 先经过了二级冷凝换热, 再经过一级显热换热。 回 水在二级冷凝换热吸收烟气余热后, 再进入一级显热换热中吸收高温烟气显 热, 空气预热器 1 1 穿过二级冷凝换热器与烟气进行三级换热, 提高进入换热 器的空气温度和进一步降低排烟温度。  At this time, the high-temperature flue gas is arranged in a countercurrent flow, and the first-stage sensible heat exchange and the second-stage condensation heat exchange are performed from bottom to top; while the water flow direction is opposite, first, the second-stage condensation heat exchange is performed, and then the first-stage sensible heat exchange is performed. After the secondary condensing heat transfer absorbs the residual heat of the flue gas, it returns to the first-stage sensible heat transfer to absorb the sensible heat of the high-temperature flue gas. The air preheater 1 passes through the secondary condensing heat exchanger and the flue gas carries out three stages. Heat exchange increases the temperature of the air entering the heat exchanger and further reduces the exhaust temperature.

如图 6〜图 1 1所示, 螺旋翅片盘管管束 4由复数个螺旋翅片盘管上下倒置 贴合组成并且对所述螺旋翅片盘管管束 4相邻的翅片进行折弯或挤压处理, 使 得翅片沿管束轴向呈一定角度内折。 当然, 也可以直接进行切割处理。 翅片管 两侧内折面可以平行或成一定角度, 便于相邻翅片管的紧密排列。  As shown in FIG. 6 to FIG. 11 , the spiral finned coil bundle 4 is composed of a plurality of spiral fin coils upside down and folded, and the fins adjacent to the spiral fin coil bundle 4 are bent or The extrusion process causes the fins to be folded at an angle along the axial direction of the tube bundle. Of course, the cutting process can also be performed directly. Finned tubes The inner folds on both sides can be parallel or at an angle to facilitate the close arrangement of adjacent finned tubes.

如图 10所示, 图 10为烟气过外导流板的工作原理示意图。 所述螺旋翅片 盘管管束 4的外侧设置有外导流板 5,所述外导流板 5为 "V"型螺旋状导流板, 与螺旋翅片盘管外侧贴合, 紧密排列的螺旋翅片盘管的相邻处与外导流板 5的 导流口相互错开。 As shown in FIG. 10, FIG. 10 is a schematic view showing the working principle of the flue gas passing through the outer deflector. Spiral fin An outer baffle 5 is disposed on the outer side of the coiled tube bundle 4, and the outer baffle 5 is a "V"-shaped spiral baffle, which is attached to the outer side of the spiral finned coil, and closely arranged spiral finned coils The adjacent portions are offset from the flow guiding ports of the outer deflector 5.

如图 1 1所示, 图 1 1 为烟气过内导流板的工作原理示意图, 复数个紧密排 列螺旋翅片盘管 8组合成圆筒状, 且, 对所述复数个紧密排列螺旋翅片盘管 8 相邻的翅片进行折弯或挤压处理,使得翅片沿管束轴向呈一定角度内折。当然, 也可以直接进行切割处理。所述复数个紧密排列螺旋翅片盘管 8的内侧设置有 内导流板 7, 所述内导流板 7为其上附有多个孔和 /或缝的圆筒状导流板, 与螺 旋翅片盘管内侧贴合, 复数个紧密排列螺旋翅片盘管 8的相邻处与内导流板 7 的导流口相互错开。  As shown in FIG. 11 , FIG. 11 is a schematic diagram of the working principle of the flue gas inner deflector, and a plurality of closely arranged spiral fin coils 8 are combined into a cylindrical shape, and the plurality of closely arranged spiral fins are arranged. The adjacent fins of the coiled tube 8 are bent or pressed to fold the fins at an angle along the axial direction of the tube bundle. Of course, the cutting process can also be performed directly. The inner side of the plurality of closely arranged spiral fin coils 8 is provided with an inner baffle 7 which is a cylindrical baffle with a plurality of holes and/or slits attached thereto, and The inner side of the spiral fin coil is fitted, and the adjacent portions of the plurality of closely arranged spiral fin coils 8 are offset from the flow guiding ports of the inner deflector 7.

如图 12所示, 图 12为本发明再一个实施例中带有两个空气预热器的强制 螺旋翅片盘管冷凝供热换热器的右视结构示意图。 所述排烟管道 15 内设置有 带有两根长方体形空气进气管的空气预热器 1 1。  As shown in Fig. 12, Fig. 12 is a schematic right side view showing a forced spiral fin coil condenser heat supply heat exchanger with two air preheaters in still another embodiment of the present invention. An air preheater 1 1 having two rectangular air intake pipes is disposed in the exhaust duct 15.

综上, 本发明从研究如何改进传热面结构出发, 增大换热面积以提高换热 效率。其采用内折螺旋翅片盘管做为强制螺旋翅片盘管冷凝供热换热器的基本 元件, 强化了烟气侧的换热, 同时也使整个换热器体积进一步减少。  In summary, the present invention starts from the study of how to improve the structure of the heat transfer surface, and increases the heat exchange area to improve the heat exchange efficiency. The inner folded spiral fin coil is used as the basic component of the forced spiral fin coil condenser heat supply heat exchanger, which enhances the heat exchange on the flue gas side and further reduces the volume of the entire heat exchanger.

通过外导流板 5和内导流板 7的导向设计, 使得烟气的流动路径紧贴翅片 管, 进一步加强换热, 明显改善壳程流体流速分布, 减小烟气流的 "死区 " 或 "短路" 现象。 并且发明将空气预热器 1 1 巧妙地结合在换热器中, 通过实验 显示, 当在冬天室外空气达到 -20°C以下, 利用烟气余热提高进入炉膛的空气 温度同时进一步降低排烟温度, 使得效率达到 98%以上。  Through the guiding design of the outer deflector 5 and the inner deflector 7, the flow path of the flue gas is closely attached to the finned tube, further enhancing heat exchange, significantly improving the flow velocity distribution of the shell-side fluid, and reducing the "dead zone" of the flue gas flow. " or "short circuit" phenomenon. Invented, the air preheater 1 1 is skillfully combined in the heat exchanger. Experiments show that when the outdoor air reaches below -20 ° C in winter, the residual heat of the flue gas is used to increase the temperature of the air entering the furnace while further reducing the exhaust gas temperature. , making the efficiency reach 98% or more.

同时, 本发明对关键零部件模块化设计, 易于批量化生产, 降低换热器的 生产难度, 节约生产成本。  At the same time, the invention has a modular design of key components, is easy to mass-produce, reduces the production difficulty of the heat exchanger, and saves production costs.

应说明的是, 以上实施例仅用以说明本发明的技术方案而非限制, 尽管参 照较佳实施例对本发明进行了详细说明, 本领域的普通技术人员应当理解, 可 以对本发明的技术方案进行修改或者等同替换, 而不脱离本发明技术方案的精 神和范围, 其均应涵盖在本发明的权利要求范围当中。  It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and the present invention is not limited thereto. Although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be Modifications or equivalents are intended to be included within the scope of the appended claims.

Claims

权利要求  Rights request
1、 一种强制螺旋翅片盘管冷凝供热换热器, 包括壳体(3), 设置于壳体(3) 内的燃烧器(6) 与螺旋翅片盘管, 壳体(3)上设置有进水口 (14)、 出水口 (13) 及排烟口 (12), 燃烧器 (6) 与空气及燃气进气装置连接, 其特征在于:  1. A forced spiral finned coil condensing heat supply heat exchanger comprising a casing (3), a burner (6) and a spiral finned coil disposed in the casing (3), and a casing (3) The water inlet (14), the water outlet (13) and the smoke outlet (12) are arranged, and the burner (6) is connected with the air and gas inlet device, and is characterized in that:
燃烧器 (6) 位于壳体 (3) 上部, 燃烧器 (6) 周围同轴安装有螺旋翅片盘 管管束 (4), 燃烧器 (6) 下方设置有由复数个紧密排列螺旋翅片盘管 (8) 组 成的排烟管道 (15), 排烟管道 (15) 通过排烟口 (12) 排空;  The burner (6) is located at the upper part of the casing (3), and a spiral finned coil bundle (4) is coaxially mounted around the burner (6), and a plurality of tightly arranged spiral finned discs are arranged below the burner (6). a smoke exhaust pipe (15) composed of a pipe (8), and a smoke exhaust pipe (15) is evacuated through a smoke exhaust port (12);
进水口 (14) 与燃烧器 (6) 下方复数个紧密排列螺旋翅片盘管 (8) 连通, 燃烧器 (6) 下方复数个紧密排列螺旋翅片盘管 (8) 与燃烧器 (6) 周围的螺旋 翅片盘管连通, 燃烧器 (6) 周围的螺旋翅片盘管与出水口 (13) 连通。  The water inlet (14) is connected to a plurality of closely arranged spiral fin coils (8) under the burner (6), and a plurality of tightly arranged spiral fin coils (8) and burners (6) below the burner (6) The surrounding spiral fin coils are connected, and the spiral fin coils around the burner (6) are in communication with the water outlet (13).
2、根据权利要求 1所述的强制螺旋翅片盘管冷凝供热换热器,其特征在于: 对所述螺旋翅片盘管管束 (4) 及所述复数个紧密排列螺旋翅片盘管 (8) 相邻 的翅片进行折弯或挤压处理, 螺旋翅片盘管两侧翅片呈一定角度内折, 翅片管 所形成的两个内折面是平行的或呈现一定角度。  2. The forced spiral finned coil condensing heat exchanger according to claim 1, wherein: said spiral finned coil bundle (4) and said plurality of closely arranged spiral finned coils (8) The adjacent fins are bent or squeezed, and the fins on both sides of the spiral fin coil are folded at an angle, and the two inner folds formed by the finned tubes are parallel or at a certain angle.
3、根据权利要求 1所述的强制螺旋翅片盘管冷凝供热换热器,其特征在于: 所述螺旋翅片盘管管束 (4) 以及所述复数个紧密排列螺旋翅片盘管 (8) 都由 复数个螺旋翅片盘管上下倒置贴合组成。  3. A forced spiral finned coil condensing heat exchanger according to claim 1, wherein: said spiral finned coil bundle (4) and said plurality of closely arranged spiral finned coils ( 8) It consists of a plurality of spiral finned coils upside down.
4、根据权利要求 1所述的强制螺旋翅片盘管冷凝供热换热器,其特征在于: 所述螺旋翅片盘管管束 (4) 的外侧设置有外导流板 (5)。  The forced spiral fin coil condensing heat supply heat exchanger according to claim 1, wherein an outer deflector (5) is disposed outside the spiral finned coil bundle (4).
5、根据权利要求 4所述的强制螺旋翅片盘管冷凝供热换热器,其特征在于: 所述外导流板 (5) 为 "V" 型螺旋状导流板, 与螺旋翅片盘管外侧贴合, 紧密 排列的螺旋翅片盘管的相邻处与外导流板 (5) 的导流口相互错开。  The forced spiral fin coil condensing heat supply heat exchanger according to claim 4, wherein: said outer deflector (5) is a "V" type spiral baffle, and a spiral fin The outer side of the coil is fitted, and the adjacent portions of the closely arranged spiral fin coils are offset from the flow guiding ports of the outer deflector (5).
6、 根据权利要求 1权利要求所述的强制螺旋翅片盘管冷凝供热换热器, 其 特征在于: 所述燃烧器 (6) 下方组成排烟管道 (15) 的复数个紧密排列螺旋翅 片盘管 (8) 的内侧设置有内导流板 (7)。  6. The forced spiral fin coil condensing heat supply heat exchanger according to claim 1, wherein: the plurality of closely arranged spiral fins constituting the exhaust pipe (15) under the burner (6) An inner deflector (7) is provided on the inner side of the coiled tube (8).
7、根据权利要求 6所述的强制螺旋翅片盘管冷凝供热换热器,其特征在于: 所述内导流板 (7) 为其上附有多个孔和 /或缝的圆筒状导流板, 与螺旋翅片盘 管内侧贴合, 复数个紧密排列螺旋翅片盘管 (8) 的相邻处与内导流板 (7) 的 导流口相互错开。  7. A forced spiral finned coil condensing heat supply heat exchanger according to claim 6, wherein: said inner deflector (7) is a cylinder having a plurality of holes and/or slits attached thereto The baffle is attached to the inner side of the spiral fin coil, and the adjacent portions of the plurality of tightly arranged spiral fin coils (8) are offset from the inner flow guides of the inner deflector (7).
8、根据权利要求 1所述的强制螺旋翅片盘管冷凝供热换热器,其特征在于: 所述排烟管道 (15) 内设置有空气预热器 (11 ) ; 所述空气预热器 (11 ) 穿过排 烟管道 (15) 与空气进气装置连接; 所述排烟口 (12) 为四通式排烟口, 其上 端为排烟口 (12), 其下端为冷凝水出口 (16), 中部为空气预热器 (11 ) 的空 气进口 (17)。 8. The forced spiral finned coil condensing heat supply heat exchanger according to claim 1, wherein: An air preheater (11) is disposed in the exhaust pipe (15); the air preheater (11) is connected to the air intake device through the exhaust pipe (15); the exhaust port (12) It is a four-type exhaust port with an exhaust port (12) at the upper end, a condensate outlet (16) at the lower end, and an air inlet (17) for the air preheater (11) in the middle.
9、根据权利要求 8所述的强制螺旋翅片盘管冷凝供热换热器,其特征在于: 所述排烟管道 (15) 内的空气预热器 (11 ) 为一根或多根长方体或圆柱形空气 进气管。  The forced spiral fin coil condensing heat supply heat exchanger according to claim 8, wherein: the air preheater (11) in the exhaust pipe (15) is one or more rectangular parallelepipeds. Or a cylindrical air intake pipe.
10、 根据权利要求 1 所述的强制螺旋翅片盘管冷凝供热换热器, 其特征在 于: 燃烧器 (6) 位于壳体 (3) 下部, 燃烧器 (6) 周围同轴安装有螺旋翅片盘 管管束 (4), 燃烧器 (6) 上方设置有由壳体 (3) 与复数个紧密排列螺旋翅片 盘管 (8) 组成的排烟管道 (15), 排烟管道 (15) 通过排烟口 (12) 排空; 进 水口 (14) 与燃烧器 (6) 上方复数个紧密排列螺旋翅片盘管 (8) 连通, 燃烧 器 (6) 上方复数个紧密排列螺旋翅片盘管 (8) 与燃烧器 (6) 周围的螺旋翅片 盘管连通, 燃烧器 (6) 周围的螺旋翅片盘管与出水口 (13) 连通。  10. The forced spiral finned coil condensing heat supply heat exchanger according to claim 1, wherein: the burner (6) is located at a lower portion of the casing (3), and a spiral is coaxially mounted around the burner (6). The finned coil bundle (4), the burner (6) is provided with a smoke exhaust pipe (15) composed of a casing (3) and a plurality of closely arranged spiral finned coils (8), and a smoke exhaust pipe (15) ) venting through the exhaust vent (12); the inlet (14) is connected to a plurality of closely arranged spiral fin coils (8) above the burner (6), and a plurality of closely arranged spiral fins above the burner (6) The coil (8) is in communication with the spiral fin coil around the burner (6), and the spiral fin coil around the burner (6) is in communication with the water outlet (13).
PCT/CN2013/083900 2012-09-21 2013-09-22 Forced spiral finned coil condensation heat-supplying heat exchanger WO2014044208A1 (en)

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