CN205137516U - Air heater based on air water heat transfer - Google Patents
Air heater based on air water heat transfer Download PDFInfo
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- CN205137516U CN205137516U CN201520569303.5U CN201520569303U CN205137516U CN 205137516 U CN205137516 U CN 205137516U CN 201520569303 U CN201520569303 U CN 201520569303U CN 205137516 U CN205137516 U CN 205137516U
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- air
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- air preheater
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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
Abstract
The utility model provides an air heater based on air water heat transfer, includes air heater main part, air flaring section, air tapered section and business turn over water system. The air heater main part includes two sets of heat transfer finned tube modules at least, and every group heat transfer finned tube module is including heat transfer finned tube, ribbed pipe connecting pipe and the support end plate of taking the fin, the business turn over water system includes inlet tube and outlet pipe, and the inlet tube includes the parallelly connected water inlet branch pipe who arranges of water inlet manifold and duo gen, the outlet pipe includes outfall sewer and duo gen parallel distribution's water outlet branch pipe. Air flaring section and air tapered section set up respectively in the air inlet side of air heater main part and air -out side. The utility model has the characteristics of heat transfer performance is high, small, air side and water side flow dynamic resistance are little and with low costs etc, but the wide application can improve the combustion air temperature in gas boiler, oil fired boiler, direct combustion machine, industrial stoves, metallurgy and chemical industry isokinetic equipment, and then improves combustion apparatus's combustion efficiency and system's gross efficiency, implementation system efficiency maximize.
Description
Technical field
The utility model relates to a kind of air preheater based on air water heat exchange, specifically relates to the power-equipment air preheaters such as gas fired-boiler, oil burning boiler, coal-burning boiler, Central Air-Conditioner, Industrial Stoves, metallurgy, chemical industry, belongs to Thermal Equipment technical field.
Background technology
The northern area of China Summer and winter temperature difference is comparatively large, and the combustion air temperature fluctuation of boiler combustion is comparatively large, can cause the phenomenons such as ignition of the boiler difficulty, combustion instability, thus cause boiler combustion efficiency to reduce.For guaranteeing that energy-saving high-efficient boiler runs, generally install air preheater additional in boiler front portion, the outer Cryogenic air of high-temperature-hot-water/high-temperature flue gas heating clamber in utilization, thus improve combustion air temperature, and then improve boiler combustion efficiency and system total efficiency, realize system energy efficiency and maximize.
Air preheater is of a great variety in the market, as gentle in gas-gas heat exchanger-working fluid heat exchanger, there is the defects such as volume is large, heat transfer property is poor, flow resistance is large in gas-gas heat exchanger, and gas-working fluid heat exchanger (as air-conditioning) also exists that caliber is little, fin arrangement is tight, windage is large and internal structure is complicated etc., major part has following shortcoming: heat transfer property is poor, energy-saving effect is not remarkable, and volume and consumptive material increase; For ensureing the energy-saving effect of air preheater, air-side blockage is very large, affects the normal use of combustor, even needs to increase blower fan to overcome air-side blockage; Water collateral resistance is large, increases electrical power consumption of water pump; Partial air preheater inleakage is large, causes burning oxygen amount to reduce, increases heat loss due to incomplete combustion; Simultaneously device fabrication and maintenance cost more high.
Utility model content
The purpose of this utility model is to provide a kind of air preheater based on air water heat exchange, main according to China's water quality situation, fractional energy savings is improved from improvement equipment heat transfer property, water side and air-side flow resistance is reduced from adjustment heat exchange tube diameter and the aspect such as arrangement and optimized fin spacing, reduce equipment cost and operation and maintenance cost, realize system energy efficiency and maximize.
The technical solution of the utility model is as follows:
Based on an air preheater for air water heat exchange, it is characterized in that, this air preheater comprises air preheater main body, air divergent segment, air converging transition and inlet and outlet system; Described air preheater main body is arranged by least two group heat-exchange finned tube module arrays to form, and often organizes heat exchange fin tube module and comprise finned heat-exchange finned tube, ribbed pipe tube connector and support end plate; Inlet and outlet system comprises water inlet pipe and outlet pipe, wherein, water inlet pipe comprises the water inlet pipe that water inlet manifold and Duo Gen are arranged in parallel, and outlet pipe comprises the exit branch of outfall sewer distribution parallel with Duo Gen, water inlet pipe arranges drain valve, outlet pipe arranges air bleeding valve; Every root water inlet pipe is connected respectively by the fin tube connector of short tube with heat exchange fin tube module two ends with exit branch; Air divergent segment and air converging transition are separately positioned on inlet side and the air side of air preheater main body, and water inlet manifold is arranged on air side, and outfall sewer is arranged on inlet side.
Preferably, the entrance of described water inlet pipe is positioned at the bottom of air preheater main body, and the outlet of outlet pipe is positioned at the top of air preheater main body.
Preferably, this balancing orifice is positioned at the centre position of two rows heat-exchange finned tube; Described fin adopts flat structures.
In technique scheme, between the water inlet pipe of described inlet and outlet system and outlet pipe, adopt in parallel or arranged in series.The heat-exchange finned tube often organized in heat exchange fin tube module adopts copper tube, and intersection is staggered in arrangement; Fin adopts aluminum fin-stock or copper fin.
The utility model has the following advantages and the technique effect of high-lighting:
The technical solution of the utility model has the following advantages and the technique effect of high-lighting: 1. because air preheater main body have employed the strong heat exchange fin tube module of many group heat conductivilitys, effectively enhance heat exchange property, improve energy-saving efficiency.2. the inlet and outlet system of air preheater is optimized, and adopts many Inlet and outlet waters branch road to arrange with journey, guarantee the same Cheng Liudong of each branch road water system, reduce water collateral resistance little.3. the structure of plate fin is adopted in the air side of air preheater main body, reasonable arrangement spacing of fin, simultaneously air preheater main body inlet side and air side arranges air divergent segment respectively and air converging transition carries out air conducting, effectively can reduce air-side flow resistance.4. the fin of air preheater main body adopts high rib fin structure, and improve unit are heat exchange property, finally realize equipment volume little, structure is compacter.5. air preheater main body can realize modularization processing technology, is easy to process and assemble, effectively reduces equipment cost.
In a word, a kind of air preheater based on air water heat exchange that the utility model provides, effectively can improve the temperature of gas power equipment combustion air, and then improves efficiency of combustion and the system total efficiency of combustion apparatus, realizes system energy efficiency and maximizes.
Accompanying drawing explanation
The structural representation of the first embodiment of air preheater based on air water heat exchange that Fig. 1 provides for the utility model.
The structural representation of the air preheater the second embodiment based on air water heat exchange that Fig. 2 provides for the utility model.
Fig. 3 is the utility model heat-exchange finned tube modular structure schematic diagram.
Fig. 4 is the A-A view profile of Fig. 3.
Fig. 5 is the operation principle schematic diagram based on the first embodiment.
Fig. 6 is the operation principle schematic diagram based on the second embodiment.
In Fig. 1 to Fig. 6: 1-air heat exchanger main body; 2-air divergent segment; 3-air converging transition; 4-water inlet pipe; 5-drain valve; 6-outlet pipe; 7-air bleeding valve; 8-heat-exchange finned tube; 9-ribbed pipe tube connector; 10-supports end plate; 11-adpting flange; 12-deckle board; 13-short tube; 14-balancing orifice; 15-fin.
Detailed description of the invention
Below in conjunction with accompanying drawing, structure of the present utility model, principle and detailed description of the invention are described further.
A kind of air preheater structural representation based on air water heat exchange that Fig. 1 and Fig. 2 provides for the utility model, this air preheater mainly comprises air preheater main body 1, air divergent segment 2, air converging transition 3 and inlet and outlet system.Outdoor Cryogenic air first enters air preheater main body 1 through air divergent segment 2, combustion air after heating flows out through air converging transition 3 again, wherein air divergent segment 2 mainly plays the even diffusion of air, air divergent segment 2 and air converging transition 3 pass through Flange joint with air preheater main body 1, adopt sealing gasket to seal between adpting flange 11, prevent air leakage; Inlet and outlet system comprises water inlet pipe 4 and outlet pipe 6, wherein, water inlet pipe 4 comprises the water inlet pipe that water inlet manifold and Duo Gen are arranged in parallel, outlet pipe 6 comprises the exit branch of outfall sewer distribution parallel with Duo Gen, water inlet pipe 4 is identical with the quantity of outlet pipe 6, guarantee often to prop up the same Cheng Liudong in water route, regulated the water collateral resistance of air preheater main body 1 by adjustment branch water inlet way; Drain valve 5 is arranged on the bottom of water inlet pipe 4, plays sluicing effect; Air bleeding valve 7 is positioned at the top of outlet pipe 6, plays automatic vent effect; Every root water inlet pipe is connected with the fin tube connector 9 of exit branch with heat exchange fin tube module two ends by short tube 13, guarantees that water route is unimpeded; Support end plate 10 for supporting the weight often organizing heat exchange fin tube module and accessory thereof, material selection has the 1Cr13 martensitic stain less steel of anti-corrosion function, guarantees the service life of equipment; Deckle board 12 forms a four sides air channel structure with support end plate 10, and employing is welded to connect, and material is 1Cr13 martensitic stain less steel; Air divergent segment 2 and air converging transition 3 are separately positioned on inlet side and the air side of air preheater main body 1, horizontal and vertical is installed, and (Fig. 1 is that level is installed, Fig. 2 is at right angle setting), also certain angle can be kept with air preheater main body, the air inlet direction of main consideration air heat exchanger main body, to realize importing and exporting the uniform effect of air.
Water inlet manifold is arranged on air side, and outfall sewer is arranged on inlet side; All heat-insulation layer is installed additional in the outside of air preheater main body 1, air divergent segment 2 and air converging transition 3; heat-insulation layer adopts stainless steel casing to protect outward; simultaneously the water inlet pipe 4 of air preheater and outlet pipe 6 all adopt insulation material to carry out isothermal holding, to reduce the radiation loss of air preheater.
Fig. 3 is heat-exchange finned tube function structure chart, and as shown in the figure, heat exchange fin tube module comprises heat-exchange finned tube 8, ribbed pipe tube connector 9, support end plate 10 and the fin 15 of being with fin 15.Air preheater main body 1 is arranged by least two group heat-exchange finned tube module arrays to form, wherein often organize heat exchange fin tube module to be connected with outlet pipe 6 by the water inlet pipe 4 of short tube 13 with fin heat exchange pipe module two ends, often organize the same Cheng Liudong in water route of heat exchange fin tube module, guarantee that every root heat-exchange finned tube 8 gives full play to its heat exchange property, and maximize reduction water effluent dynamic resistance.Heat-exchange finned tube 8 adopts copper tube, fin 15 adopts aluminum fin-stock or copper fin material, cross arrangement between heat-exchange finned tube 8, have that heat transfer property is strong, spacing of fin rationally, air side and water effluent dynamic resistance is little, heat transfer area large and the advantage such as material materials province, be the core component of air preheater.
Fig. 4 is the utility model heat-exchange finned tube modular structure A-A view profile, as shown in the figure, the fin 15 of heat exchange fin tube module is flat sheet, up and down without embossing, fin thickness is higher than general heat exchange fin thickness (>=0.2mm), spacing of fin width >=2mm, when meeting heat exchange property, reduces the flow resistance of air side; Fin 15 has leg-of-mutton balancing orifice 14, and this balancing orifice 14 is positioned at the centre position of two rows heat-exchange finned tube 8, guarantees that air flow field is evenly distributed, and improves heat exchange efficiency; Seamless compact siro spinning technology between heat-exchange finned tube 8 and fin 15, reduces thermal conduction resistance, and the stagger arrangement that simultaneously intersects between heat-exchange finned tube is arranged, and can strengthen air side disturbance, to improve heat transfer property.
Fig. 5 and Fig. 6 is a kind of air preheater fundamental diagram based on air water heat exchange that the utility model proposes, as shown in the figure, air preheater is arranged on boiler inlet air channel, outdoor air is first through air divergent segment 2, enter air preheater main body 1 again after air-distribution is even to heat, combustion air after heating enters air channel through air converging transition 3, and final high temperature air enters boiler and participates in burning, thus improves the efficiency of combustion of boiler; The primary water of steam generator system first enters flue gas waste heat recovery apparatus or directly enters boiler heating after air preheater, if directly enter flue gas waste heat recovery apparatus can reduce exhaust gas temperature further, improve boiler thermal output, realize system energy efficiency and maximize.
Claims (5)
1. based on an air preheater for air water heat exchange, it is characterized in that, this air preheater comprises air preheater main body (1), air divergent segment (2), air converging transition (3) and inlet and outlet system; Described air preheater main body is arranged by least two group heat-exchange finned tube module arrays to form, and often organizes heat exchange fin tube module and comprise heat-exchange finned tube (8), the ribbed pipe tube connector (9) of band fin (15) and support end plate (10); Inlet and outlet system comprises water inlet pipe (4) and outlet pipe (6), wherein, water inlet pipe (4) comprises the water inlet pipe that water inlet manifold and Duo Gen are arranged in parallel, outlet pipe (6) comprises the exit branch of outfall sewer distribution parallel with Duo Gen, water inlet pipe (4) arranges drain valve (5), outlet pipe (6) arranges air bleeding valve (7); Every root water inlet pipe is connected with the fin tube connector (9) at heat exchange fin tube module two ends respectively by short tube (13) with exit branch; Air divergent segment (2) and air converging transition (3) are separately positioned on inlet side and the air side of air preheater main body (1), and water inlet manifold is arranged on air side, and outfall sewer is arranged on inlet side.
2. a kind of air preheater based on air water heat exchange according to claim 1, it is characterized in that, the entrance of water inlet pipe (4) is positioned at the bottom of air preheater main body (1), and the outlet of outlet pipe (6) is positioned at the top of air preheater main body (1).
3. a kind of air preheater based on air water heat exchange according to claim 1 and 2, it is characterized in that, described fin (15) is provided with multiple triangle balancing orifice (14), and this balancing orifice is positioned at the centre position of two rows heat-exchange finned tube (8); Described fin adopts flat structures.
4. a kind of air preheater based on air water heat exchange according to claim 1 and 2, is characterized in that, adopts in parallel or arranged in series between the water inlet pipe (4) of inlet and outlet system and outlet pipe (6).
5. a kind of air preheater based on air water heat exchange according to claim 4, is characterized in that, the heat-exchange finned tube (8) often organized in heat exchange fin tube module adopts copper tube, and intersection is staggered in arrangement; Fin (15) adopts aluminum fin-stock or copper fin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520569303.5U CN205137516U (en) | 2015-07-31 | 2015-07-31 | Air heater based on air water heat transfer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520569303.5U CN205137516U (en) | 2015-07-31 | 2015-07-31 | Air heater based on air water heat transfer |
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| CN205137516U true CN205137516U (en) | 2016-04-06 |
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| CN201520569303.5U Active CN205137516U (en) | 2015-07-31 | 2015-07-31 | Air heater based on air water heat transfer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042622A (en) * | 2015-07-31 | 2015-11-11 | 北京建筑大学 | Air preheater based one air-water heat exchange |
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2015
- 2015-07-31 CN CN201520569303.5U patent/CN205137516U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042622A (en) * | 2015-07-31 | 2015-11-11 | 北京建筑大学 | Air preheater based one air-water heat exchange |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |