CN201593801U - Air preheater with horizontal flow of flue gas from high temperature to low temperature - Google Patents
Air preheater with horizontal flow of flue gas from high temperature to low temperature Download PDFInfo
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- CN201593801U CN201593801U CN2010200101404U CN201020010140U CN201593801U CN 201593801 U CN201593801 U CN 201593801U CN 2010200101404 U CN2010200101404 U CN 2010200101404U CN 201020010140 U CN201020010140 U CN 201020010140U CN 201593801 U CN201593801 U CN 201593801U
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000003546 flue gas Substances 0.000 title claims abstract description 54
- 230000007704 transition Effects 0.000 claims abstract description 21
- 210000003298 dental enamel Anatomy 0.000 claims abstract description 19
- 238000005260 corrosion Methods 0.000 claims abstract description 16
- 238000005192 partition Methods 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 2
- 230000005923 long-lasting effect Effects 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 239000000779 smoke Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 241000587161 Gomphocarpus Species 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012808 vapor phase Substances 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
一种水平流动的烟气从高温降至低温的空气预热器，它主要是在高温烟气进口至低温烟气出口的换热过程中依次设置高温扰流子换热器、热管空气预热器、低温防腐取热器，并在它们之间设空气过渡段。高温扰流子换热器主要包括有扰流子管束、管板、外壳板、烟气进口管和空气出口管；热管空气预热器主要是由热管束、管板、中间隔板、盖板及外壳板组成的；低温防腐取热器主要包括有搪瓷管束、管板、外壳板、烟气出口管和空气进口管。本实用新型各自发挥各种换热器的优点、逐级换热，使本实用新型能在烟气温度比较高转化为比较低的两种极限工况下使用，热效率高、成本低，安全可靠，使用寿命长。
An air preheater for horizontally flowing flue gas from high temperature to low temperature. It is mainly installed in sequence with high temperature spoiler heat exchanger and heat pipe air preheating during the heat exchange process from the high temperature flue gas inlet to the low temperature flue gas outlet. Devices, low-temperature anti-corrosion heat collectors, and an air transition section between them. The high-temperature spoiler heat exchanger mainly includes spoiler tube bundles, tube plates, shell plates, flue gas inlet pipes and air outlet pipes; the heat pipe air preheater is mainly composed of heat tube bundles, tube plates, middle partitions, cover plates And shell plate; low temperature anti-corrosion heat collector mainly includes enamel tube bundle, tube plate, shell plate, flue gas outlet pipe and air inlet pipe. The utility model takes advantage of the advantages of various heat exchangers and exchanges heat step by step, so that the utility model can be used under two extreme working conditions where the flue gas temperature is relatively high and converted to relatively low, with high thermal efficiency, low cost, and safety and reliability. ,long lasting.
Description
技术领域：本实用新型涉及一种空气预热器。Technical field: The utility model relates to an air preheater.
背景技术：目前，热管空气预热器广泛应用在石油、化工、冶金等行业的加热炉节能设备中，有立式和卧式两种，一般适用于管壁温度为中低温工况。但是烟气介质中含有硫的氧化物和水分，当烟气温度低于酸露点温度时，烟气就会在热管表面结露，造成烟气中硫化物对热管的腐蚀。同时许多工况的烟气介质温度比较高，为防止热管因温度过高而发生爆管，人们曾采用高温热管，但其工作介质凝固点较高，在温度较低时易造成内部工质滞留，或者在冷端使传热工质凝固，而影响传热性能；人们也曾设法降低热管壁温即减少烟气侧换热面积，但是达到相同的换热能力就需增加设备的体积，提高设备成本。Background technology: At present, heat pipe air preheaters are widely used in energy-saving equipment for heating furnaces in industries such as petroleum, chemical industry, and metallurgy. However, the flue gas medium contains sulfur oxides and moisture. When the flue gas temperature is lower than the acid dew point temperature, the flue gas will condense on the surface of the heat pipe, causing the sulfide in the flue gas to corrode the heat pipe. At the same time, the temperature of the flue gas medium in many working conditions is relatively high. In order to prevent the heat pipe from bursting due to excessive temperature, people have used high-temperature heat pipes, but the freezing point of the working medium is high, and it is easy to cause internal working fluid retention when the temperature is low. Or solidify the heat transfer medium at the cold end, which affects the heat transfer performance; people have also tried to reduce the wall temperature of the heat pipe, that is, reduce the heat transfer area on the flue gas side, but to achieve the same heat transfer capacity, the volume of the equipment needs to be increased, and the equipment cost.
发明内容：本实用新型的目的在于提供一种传热效率高、使用寿命长、成本低的水平流动的烟气从高温降至低温的空气预热器。SUMMARY OF THE INVENTION: The purpose of this utility model is to provide an air preheater with high heat transfer efficiency, long service life and low cost, which can lower the flue gas in horizontal flow from high temperature to low temperature.
本实用新型主要是在高温烟气进口至低温烟气出口的换热过程中依次设置高温扰流子换热器、热管空气预热器、低温防腐取热器，并在它们之间设空气过渡段。高温扰流子换热器主要包括有扰流子管束、管板、外壳板、烟气进口管和空气出口管。其中，扰流子管是一种内设扰流子强化传热的换热管，最好在扰流子管外设有扩展换热面积的翅片，如螺旋翅片、肋片、翼片、H型翅片或钉头管等。上述若干根扰流子管组成扰流子管束，空气走管内，烟气走管外。该扰流子管束上下两端分别置于上下两个矩形管板与之对应的通孔内并密封联接，使扰流子管束呈竖直状态。在上述两管板的两侧设有相对的两竖直外壳板，其与两管板构成的方筒即为扰流子室，该扰流子室一侧开口与烟气进口管一端相连，另一侧开口与热管空气预热器烟气室相连；该扰流子室下管板与空气出口管一端相连，上管板与空气过渡段A的管箱下开口相连，该空气过渡段A的管箱另一开口与热管空气预热器空气室相连。The utility model mainly arranges a high-temperature spoiler heat exchanger, a heat pipe air preheater, and a low-temperature anti-corrosion heat collector sequentially during the heat exchange process from the high-temperature flue gas inlet to the low-temperature flue gas outlet, and sets an air transition between them. part. The high temperature spoiler heat exchanger mainly includes spoiler tube bundle, tube plate, shell plate, flue gas inlet pipe and air outlet pipe. Among them, the spoiler tube is a heat exchange tube with a spoiler inside to enhance heat transfer. It is better to have fins outside the spoiler tube to expand the heat transfer area, such as spiral fins, fins, fins, etc. , H-fin or nail head tube, etc. The above-mentioned several spoiler tubes form a spoiler tube bundle, the air goes inside the tubes, and the smoke goes outside the tubes. The upper and lower ends of the turbulent sub-tube bundle are respectively placed in the corresponding through holes of the upper and lower rectangular tube plates and sealed and connected so that the turbulent sub-tube bundle is in a vertical state. There are two opposite vertical shell plates on both sides of the above two tube plates, and the square tube formed by the two tube plates is the turbulent sub-chamber, and the opening on one side of the turbulent sub-chamber is connected to one end of the flue gas inlet pipe The opening on the other side is connected to the flue gas chamber of the heat pipe air preheater; the lower tube plate of the turbulent sub-chamber is connected to one end of the air outlet pipe, the upper tube plate is connected to the lower opening of the tube box of the air transition section A, and the air transition section A The other opening of the pipe box is connected with the air chamber of the heat pipe air preheater.
热管空气预热器主要是由热管束、管板、中间隔板、盖板及外壳板组成的。其中，热管为内装传热工质的真空管，其可以是光管或扩展传热面积的翅片管、钉头管等。上述若干根热管组成的热管束中部固定在水平中间隔板与之对应的通孔上，该中间隔板一端与上述扰流子室位于空气过渡段A一侧的管板相连，上述热管束的上下两端分别置于上下两个矩形管板与之对应的通孔内，使热管束呈竖直状态。上述两管板一块与上述扰流子位于空气出口组件一侧的管板相连，另一块与空气过渡段A水平箱板相连。在上述两管板的上下两端分别设有与上下管板相连并将热管罩于其内的上下盖板，最好上盖板与上管板活动连接，以便当热管失效时，可以打开上盖板更换。在上述两管板及中间隔板的两侧设有相对的并与扰流子室两外壳板相连的两竖直外壳板，其与两管板及中间隔板构成两个方筒，上方筒为热管空气室(冷凝段)，下方筒为热管烟气室(蒸发段)。上述热管空气室一侧开口与空气过渡段A的管箱侧开口相连，另一侧开口与空气过渡段B的管箱侧开口相连；上述热管烟气室一侧开口与扰流子室的一侧开口相连，另一侧开口与低温防腐取热器侧开口相连。The heat pipe air preheater is mainly composed of heat pipe bundles, tube plates, intermediate partitions, cover plates and shell plates. Wherein, the heat pipe is a vacuum tube with a built-in heat transfer working medium, which may be a bare pipe or a finned tube with an expanded heat transfer area, a nail head tube, and the like. The middle part of the heat tube bundle composed of the above-mentioned several heat pipes is fixed on the corresponding through hole of the horizontal intermediate partition, and one end of the intermediate partition is connected with the tube plate of the above-mentioned turbulent sub-chamber on the side of the air transition section A, and the above-mentioned heat tube bundle The upper and lower ends are respectively placed in the corresponding through holes of the upper and lower rectangular tube plates, so that the heat tube bundle is in a vertical state. One of the above two tube sheets is connected to the tube sheet of the above-mentioned spoiler located on one side of the air outlet assembly, and the other is connected to the horizontal box plate of the air transition section A. The upper and lower ends of the above two tube plates are respectively provided with upper and lower cover plates connected with the upper and lower tube plates and covering the heat pipes therein. Cover replacement. On both sides of the above-mentioned two tube sheets and the middle partition, there are two vertical shell plates opposite and connected with the two shell plates of the turbulent sub-chamber, which form two square tubes with the two tube sheets and the middle partition, and the upper tube It is the heat pipe air chamber (condensation section), and the lower cylinder is the heat pipe smoke chamber (evaporation section). One side opening of the heat pipe air chamber is connected to the pipe box side opening of the air transition section A, and the other side opening is connected to the pipe box side opening of the air transition section B; The side opening is connected, and the other side opening is connected with the side opening of the low-temperature anti-corrosion heat collector.
低温防腐取热器主要包括有搪瓷管束、管板、外壳板、烟气出口管和空气进口管。其中，搪瓷管为外面附有搪瓷层的金属管，若干根上述搪瓷管组成搪瓷管束，空气走管内，烟气走管外。该搪瓷管束上下两端分别置于上下两个矩形管板与之对应的通孔内并密封连接，使搪瓷管束呈竖直状态，该两管板的同一端分别与热管烟气室的两管板相连。在上述两管板的两侧设有相对的并与扰流子室两外壳板相连的两竖直外壳板，其与两管板构成的方筒即为换热室，其一侧开口与热管烟气室相连，另一侧开口与烟气出口管一端相连；该换热室上管板与空气过渡段B的管箱下开口相连，下管板与空气进口管一端相连。The low-temperature anti-corrosion heat collector mainly includes enamel tube bundles, tube plates, shell plates, flue gas outlet pipes and air inlet pipes. Among them, the enamel tube is a metal tube with an enamel layer on the outside, and several above-mentioned enamel tubes form an enamel tube bundle, the air goes inside the tube, and the smoke goes outside the tube. The upper and lower ends of the enamel tube bundle are respectively placed in the corresponding through holes of the upper and lower rectangular tube plates and are sealed and connected so that the enamel tube bundle is in a vertical state. board connected. On both sides of the above-mentioned two tube plates, there are two vertical shell plates opposite and connected with the two shell plates of the turbulent sub-chamber. The flue gas chamber is connected, and the opening on the other side is connected to one end of the flue gas outlet pipe; the upper tube plate of the heat exchange chamber is connected to the lower opening of the tube box of the air transition section B, and the lower tube plate is connected to one end of the air inlet pipe.
当冷空气通过空气进口进入低温防腐取热器的搪瓷管内，便与热管空气预热器烟气室出来的烟气进行热量交换，升高温度的空气通过空气过渡段B进入热管空气预热器空气室与热管冷凝段内的汽相传热工质进行热量交换，使汽相工质冷凝变为流体流至蒸发段，经过热交换升温后的空气从热管空气预热器空气室出来后通过空气过渡段A进入高温扰流子换热器扰流子管束内，又与从烟气进口管进入扰流子室的高温烟气进行热量交换，空气再吸收热量后从空气出口管排出；而高温烟气经降温后进入热管空气预热器的烟气室，其与热管束蒸发段内的液相传热工质进行热量交换，将热量传递给烟气室热管内的传热工质使其蒸发变为汽体，降温后的烟气进入低温防腐取热器，与冷空气进行热交换后，从烟气出口排出。When the cold air enters the enamel tube of the low-temperature anti-corrosion heat collector through the air inlet, it exchanges heat with the flue gas from the flue gas chamber of the heat pipe air preheater, and the air with elevated temperature enters the heat pipe air preheater through the air transition section B The air chamber exchanges heat with the vapor-phase heat-transfer working medium in the heat pipe condensation section, so that the vapor-phase working medium condenses into a fluid and flows to the evaporation section. After heat exchange, the air heated up comes out of the heat pipe air preheater air chamber and passes through the air The transition section A enters the turbulent sub-tube bundle of the high-temperature turbulent sub-heat exchanger, and exchanges heat with the high-temperature flue gas entering the turbulent sub-chamber from the flue gas inlet pipe, and the air absorbs heat and is discharged from the air outlet pipe; while the high-temperature After the flue gas is cooled down, it enters the flue gas chamber of the heat pipe air preheater, where it exchanges heat with the liquid-phase heat transfer medium in the evaporation section of the heat pipe bundle, and transfers the heat to the heat transfer medium in the heat pipe of the flue gas chamber to make it Evaporation turns into gas, and the cooled flue gas enters the low-temperature anti-corrosion heat collector, exchanges heat with cold air, and is discharged from the flue gas outlet.
本实用新型与现有技术相比具有如下优点：Compared with the prior art, the utility model has the following advantages:
1、本实用新型依次设置的高温扰流子换热器、热管空气预热器和低温防腐取热器，各自发挥各种换热器的优点、逐级换热，使本实用新型能在烟气温度比较高转化为比较低的两种极限工况下使用，因为高温烟气在进入热管换热器前经过高温扰流子换热器降温，降低了热管管束蒸发段的金属壁温，这样便大大降低了热管换热器中热管管束爆管的可能性，而在低温烟气侧设置了低温防腐取热器，其换热管外表面附有搪瓷层，不易产生酸露点腐蚀。1. The high-temperature spoiler heat exchanger, the heat pipe air preheater and the low-temperature anti-corrosion heat extractor arranged in sequence in the utility model each play the advantages of various heat exchangers and perform heat exchange step by step, so that the utility model can be used in smoke The relatively high gas temperature is transformed into relatively low two extreme working conditions, because the high-temperature flue gas passes through the high-temperature turbulent sub-heat exchanger to cool down before entering the heat pipe heat exchanger, which reduces the metal wall temperature of the evaporation section of the heat pipe bundle, so that This greatly reduces the possibility of the tube bursting of the heat pipe bundle in the heat pipe heat exchanger, and a low-temperature anti-corrosion heat collector is installed on the low-temperature flue gas side, and the outer surface of the heat exchange tube is covered with an enamel layer, which is not easy to produce acid dew point corrosion.
2、结构简单、加工难度小，热效率高、成本低。2. Simple structure, low processing difficulty, high thermal efficiency and low cost.
3、安全可靠，使用寿命长。3. Safe and reliable, long service life.
4、减少了低温腐蚀材料的用量，降低了成本。4. Reduce the amount of low-temperature corrosion materials and reduce the cost.
5、降低了排烟温度，节能环保。5. Lower exhaust gas temperature, energy saving and environmental protection.
6、低温防腐取热器的换热管非常光滑，用吹灰设备极易清除积灰。6. The heat exchange tube of the low-temperature anti-corrosion heat collector is very smooth, and it is very easy to remove the accumulated dust with soot blowing equipment.
附图说明：Description of drawings:
图1是本实用新型的主视局剖示意简图。Fig. 1 is a schematic diagram of the front view of the utility model.
具体实施方式：在图1所示的水平流动的烟气从高温降至低温的空气预热器的主视剖面示意简图中，高温扰流子换热器1的扰流子管2为内有扰流子外有翅片的换热管，上述若干根扰流子管组成扰流子管束，空气走管内，烟气走管外。该扰流子管束上下两端分别置于上下两个矩形管板3与之对应的通孔内并密封联接。在上述两管板的两侧设有相对的两竖直外壳板4，其与两管板构成的方筒即为扰流子室，该扰流子室一侧开口与烟气进口管5一端相连，另一侧开口与热管空气预热器6烟气室相连；该扰流子室下管板与空气出口管7一端相连，另在空气出口侧管板的端部设有弧形板构成的膨胀节。上管板与空气过渡段A的管箱8下开口相连，该空气过渡段A的管箱另一开口为与热管空气预热器空气室相连的侧开口。热管空气预热器的热管9为外设翅片内装传热工质的真空管，上述若干根热管组成的热管束中部固定在中间隔板10与之对应的通孔上，该热管束的上下两端分别置于上下两个矩形管板11与之对应的通孔内。在上述两管板的上下两端分别设有与上下管板相连并将热管罩于其内的上下盖板12，并且上盖板与上管板活动连接。在上述两管板及中间隔板的两侧设有相对的并与扰流子室两外壳板平行的两竖直外壳板13，其与两管板及中间隔板构成两个方筒，上方筒为热管空气室，下方筒为热管烟气室，该热管空气室一侧开口与空气过渡段A的管箱侧开口相连，另一侧开口与空气过渡段B的管箱14侧开口相连；该热管烟气室一侧开口与扰流子室的一侧开口相连，另一侧开口与低温防腐取热器15侧开口相连。低温防腐取热器的搪瓷管16为外面附有搪瓷层的金属管，若干根上述搪瓷管组成搪瓷管束，空气走管内，烟气走管外。该搪瓷管束上下两端分别置于上下两个矩形管板17与之对应的通孔内并密封连接。另在空气进口侧管板的端部设有弧形板构成的膨胀节。在上述两管板的两侧设有相对的并与扰流子室两外壳板平行的两竖直外壳板18，其与两管板构成的方筒即为换热室，其一侧开口与热管烟气室相连，另一侧开口与烟气出口管19一端相连；该换热室上管板与空气过渡段B的管箱下开口相连，下管板与空气进口管20一端相连。Specific embodiments: In the schematic diagram of the front section of the air preheater where the flue gas flows horizontally from high temperature to low temperature as shown in Figure 1, the turbulent sub-tube 2 of the high-temperature
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| CN2010200101404U CN201593801U (en) | 2010-01-11 | 2010-01-11 | Air preheater with horizontal flow of flue gas from high temperature to low temperature |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104623985A (en) * | 2015-01-30 | 2015-05-20 | 福建龙净环保股份有限公司 | Flue gas heating device and flue gas processor thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104623985A (en) * | 2015-01-30 | 2015-05-20 | 福建龙净环保股份有限公司 | Flue gas heating device and flue gas processor thereof |
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Granted publication date: 20100929 Termination date: 20130111 |