CN201443778U - Highly-effective air preheater resisting flue gas erosion - Google Patents
Highly-effective air preheater resisting flue gas erosion Download PDFInfo
- Publication number
- CN201443778U CN201443778U CN2009200092421U CN200920009242U CN201443778U CN 201443778 U CN201443778 U CN 201443778U CN 2009200092421 U CN2009200092421 U CN 2009200092421U CN 200920009242 U CN200920009242 U CN 200920009242U CN 201443778 U CN201443778 U CN 201443778U
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- Prior art keywords
- fin
- flue gas
- air preheater
- heat exchange
- effective air
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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 relates to a highly-effective air preheater resisting flue gas erosion, which comprises a casing, an elastic seal system, a cast iron fin plate heat exchange element, a supporting stand and nut lead screw mounting regulating structures arranged on two sides of the supporting stand. The highly-effective air preheater is characterzed in that a sponge type metal wire which is filled on the flue gas inlet end can widen the heat exhange area, protects fins from being abraded by flue gas, stops particle impurities in flue gas, and uniforms inlet air current, the box-packed structure of the sponge metal wire is convenient for changing and cleaning, the seal between two flow processes forms a set of high rebound elasticity fluctuation-resistance composite seal system formed by a concave-convex groove, a wave-shaped elastic metal sheet at the bottom of the groove and a heated expansion strip filled in the groove, and the high rebound elasticity fluctuation-resistance composite seal system is fastened by a bolt with an elastic washer and a nut, the specific firm manufacturing technology of big circular arc rotating transition angles surrounding a flow passage and a finned plate improves the heat-proof deformation cracking and anti-erosion performance. Multiple functions of the new product are more beneficial for preheating air in the heating furnace in a highly-effective and energy-saving way.
Description
1, technical field
The utility model is the highly effective air preheater about anti-sweep of gases corrosion, belongs to the high efficient heat exchanging energy-saving equipment of heat exchange special equipment in the mechanized equipment engineering.The heat exchange that specifically can be used for petroleum refining and chemical industry, Coal Chemical Industry, chemical fertilizer, air-conditioning, air cooling, electric power facility equipment or the like requires.
2, background technology
(1) structure of traditional cast-iron air preheater and function
The installation form of cast iron type fin plate air preheater can freely determine as required, both can be horizontal, vertical, and also tilting is installed, but more with horizontal installation.Being the air preheater of (fin) vertical installation and operation as shown in Figure 1, is the cuboid structure generally.
Its basic structure is: the highly effective air preheater of this anti-flue gas low-temperature corrosion, comprise preheater shell, elastic sealing structure and cast iron fin plate shape heat exchange element, the cast iron fin plate is made up of substrate and fin, the cast iron fin plate connects by bolted shown in Figure 5 between any two, and its architectural feature is: the material of described heat exchange element is a cast iron; Substrate adopts plane or undaform; Fin is discontinuous, and the outline of the shape of its single fin can be rectangle or ligulate or fan-shaped or circular or aciculiform, or the like.Cross section can be and flows spindle line style or the streamlined or flat bow type of part spindle fully, or the like.The fin height of heat exchange element is contour or the not contour or highly distribution of mixing of 8-80mm; Fin density is contour or the equidistant or mixing spacing distribution of 5-110mm; Fin thickness is 2-8mm.Arranging of the fin of heat exchange element is block form, or alternating expression, or eccentric alternating expression, or the like.
Reference diagram 1 and Fig. 2, its basic function is: still with the flue gas of low temperature exhaust heat from top rectangular opening high speed suck air preheater, after to the heat release of fin heat exchanger plates, be sucked out from air preheater bottom rectangle opening.Air flow process then is divided into two journeys, compress at a high speed from the rectangular aperture of air preheater right side Lower Half, finish a journey behind the rectangle cover plate on the left of level flows to, 90 ° of turnovers are upwards flowed along cover plate then, the rectangular aperture that level flows to the air preheater right side first half after 90 ° of turnovers flows out again, finish second journey, in this two journey, air absorbs heat from the fin heat exchanger plates.Total is that flue gas flows from top to bottom, and air-flow direction is vertical with the flow of flue gas direction.
(2) problem of traditional cast-iron air preheater existence
There is the problem of import fin erosion corrosion in the tradition cast-iron air preheater, as shown in Figure 3., fracture smooth degree comprehensive analysis and judgement new and old according to site examining and repairing observation report and fin fracture, erosion is the import regional area during beginning, along with forward's fin by erosion, become forward's fin immediately following thereafter fin, make washed out fin scope inwardly enlarge gradually like this from port.After more fin was by erosion, heat exchange area reduces, flow perturbation reduces influenced the heat exchange effect, reduces the thermal efficiency of heating furnace.
Comparatively speaking, the corrosion of air side and erosion phenomenon are less.In order to prevent erosion, people improve cast iron quality, directly add wear-resisting elementary composition when molten steel is smelted, and perhaps smear at the position of the easy erosion of casting finished products and infiltrate wear-resisting elementary composition, and are little but the cost rising is but produced effects.
The problem that tradition cast iron type fin plate air preheater exists also is the problem that other forms of air preheater more or less exists, and this shows, improves in conjunction with the problem of its existence, has very strong engineering significance.
(3) technical thought of the traditional cast-iron air preheater of improvement
Analyze the mechanism of action of flue gas erosion, mainly being grit washes away the physics of soft cast iron open texture, and this physical process is mainly caused by operation.To this, take following technical thought:
Improve fluidised form by designing novel runner, strengthen the heat transfer of air and high-temperature flue gas, optimize heat exchange, fully reduce flue-gas temperature, fuel saving consumption.
By the design of optimizing structure, subtract and change the damage that it impacts suddenly.
By improving the manufacturing process of fin heat exchanger plates, make fin plate cast sturcture closely solid, the stress of reduction fin root is concentrated the residual stress with the monoblock heat exchanger plates, improves the surface smoothing fineness of fin plate, delay the corrosion of flue gas acid dew point, prolong the service life of heat transmission equipment.
3, summary of the invention
The purpose of this utility model is to overcome the problem that traditional cast-iron air preheater exists the import fin to be corroded by sweep of gases, and provide a kind of highly effective air preheater of anti-flue gas erosion, comprise preheater shell, elastic sealing structure and cast iron fin plate shape heat exchange element, the cast iron fin plate is made up of substrate and fin, and its architectural feature is: the material of described heat exchange element is a cast iron; Substrate adopts plane or undaform; Fin is discontinuous, and the outline of the shape of its single fin can be rectangle or ligulate or fan-shaped or circular or aciculiform, or the like.Cross section can be and flows spindle line style or the streamlined or flat bow type of part spindle fully, or the like.The fin height of heat exchange element is contour or the not contour or highly distribution of mixing of 8-80mm; Fin density is contour or the equidistant or mixing spacing distribution of 5-110mm; Fin thickness is 2-8mm.Arranging of the fin of heat exchange element is block form, or alternating expression, or eccentric alternating expression, or the like.Its principal character is: the gas approach end is filled with multi-functional sponge-type metal.
It is as follows further to specify its feature:
(1) though the shell of flue gas and air two flow processs is rectangular configuration, but the runner in the cross section is not a rectangular configuration completely, its four angles of specifically approximate rectangular runner are not 90 ° of sharp-pointed angles, but Fig. 2 and the corner that has obvious circular arc shown in Figure 4, its circular arc is not less than 20mm in general, both avoid stress to concentrate, improved gas flow pattern again.
(2) as schematic diagram 4 and shown in Figure 5, portion of gas approach end office (EO) zone filling sponge broken nitre of type metal or metal fibre agglomerate 8 are avoided the erosion corrosion of high-temperature flue gas with the protection fin, and stop the granule foreign in the flue gas.The big or small thickness of broken nitre of these sponge-type metal or metallic fiber determines that by specific design the broken nitre of thin especially metal can be wrapped in the woven wire, and the broken nitre of big metal can directly loose and fill out between fin.Sponge-type metal is equivalent to the pin wing of countless solid matters, has increased heat exchange area significantly.Because entrance point is a non-circular structure, sponge-type metal also has the effect of even distribution inlet air flow.For being convenient for changing cleaning, these sponge-type metal can also be arranged to box-packed structure.
(3) still as shown in Figure 4, sealing between the cast iron fin plate is to separate flue gas and air two media by the expanded graphite bar primary seal of the undaform resilient blade of tongue and groove, bottom land and filling thereof, the graphite bar can be with thermal expansion, the undaform resilient blade can resilience, all can keep sealing load in dynamic operation.
(4) air preheater is heavier, for control gas shock vibration generally is installed in ground with it, but flue gas is from nearly 20 meters high furnace roofs, therefore gas flue therebetween not necessarily moves towards completely anyhow, for the minimizing energy consumption often is smooth tiltedly curved direction, increased difficulty for the engineering connection of interface.As shown in Figure 1, the mounting bracket both sides of air preheater have nut screw mandrel adjustment structure, adjusting whole air preheater on the one hand makes its cast iron fin plate become a low-angle with level, the rainwater that convenient leakage is advanced or the discharge of wash water, be connected with the accurate of front and back air flue when conveniently installing on the other hand.
(5) solid technology is taked in the production of cast iron fin plate blank.On the one hand, be not static casting in casting cycle, but the vibration casting that is to say suitable mechanical oscillation casting die in casting, molten steel is fully flowed with intensive; On the other hand, cast iron fin plate blank being carried out the shot blasting on surface shock compaction handles; At last, the concavo-convex seal groove between the cast iron fin plate to reduce the distortion of concavo-convex seal groove, carries out precision optical machinery processing, to improve quality of fit again at its rough annealing stress-relieving by beat treatment.
The conventional air preheater is extensively used in various oil refining, chemical industry, chemical fertilizer plant muchly, and has produced huge economic benefit.Present technique can be used in the smoke pre-heating recovery system of the newly-built or all kinds of devices transformed of oil plant, structural principle that it is new and manufacturing technology can overcome many shortcomings of legacy equipment comprehensively, effectively prolong the life cycle of single devices, reduce maintenance and maintenance cost, to play good effect for all kinds of unit furnaces are partly energy-saving and cost-reducing, will also produce remarkable economic efficiency.In recent years, along with crude oil poor qualityization and energy crisis, country strengthened the management to energy-saving and emission-reduction, and enterprise pays much attention to high efficient heat exchanging new technology and application thereof in enhancing efficiency by relying on tapping internal latent power, and this application for this patented technology provides good condition.
4, description of drawings
Shown in Figure 1 is the outward appearance schematic flow sheet of traditional cast-iron air preheater, mainly comprises 17 housings, and 18 install the adjusting machines, and 19 bracing frames, 20 heat exchange elements, 21 hermetically-sealed constructions, flue gas flow from top to bottom, and air-flow direction is vertical with the flow of flue gas direction.
Shown in Figure 2 is one group of traditional cast iron fin plate simulating piece pictorial diagram, only is used for foundry trial research.Thin portion structure comprises 1 substrate, 2 fins, 3 flue gas flow channels, 4 air flow channels, 5 hermetically-sealed constructions, 6 circular arc corners.
Shown in Figure 3 is a traditional block casting iron fin plate pictorial diagram, and the most of fin 7 that is installed in import one end is by erosion, and the fin of erosion fracture and inhomogeneous, and when air-flow entry port section was described, it was uneven that its fluidised form distributes.
Shown in Figure 4 is structural representation of the present utility model, comprises 8 sponge metals, 9 elastic packings, 6 circular arc corners, 10 elastomeric pads, 11 bolts, 12 nuts, 1 substrate, 2 fins.
Shown in Figure 5 is to fill out design sketch between fin than the fine wire 13 shape plug that kneads, within it portion then suitably laterally pendulum fill out some and play the obstruction effect than 14 pairs of thin metallic fibers of heavy wire, in order to avoid it is flushed away.
Shown in Figure 6 is that several wire fiber monomers are placed in comparative effectiveness figure in kind together, comprise 13 thin and short wire fibers, 14 thin and long bending metals silk fibers, 15 thick and long bending metals silk fibers, 16 thin and wire fibers long and that spiral is coiled.
5, the specific embodiment
Compare with traditional cast-iron air preheater, structural design not very big change is still all very crucial, the optimization of manufacturing process technology then is the indispensable part of the utility model, below in conjunction with embodiment and accompanying drawing, the utility model is further described, but embodiment of the present utility model is not limited thereto.
At first, make monolithic cast iron fin plate, note guaranteeing respectively to turn radius of corner by traditional mode of production.
Secondly, to the heat treatment of annealing of monolithic cast iron fin plate, to eliminate its inside because of casting the residual stress that cold scarce inequality causes.
The 3rd, monolithic cast iron fin plate is carried out the shot blasting on surface compaction treatment, improve case hardness, wash away abrasion with anti-.Note control spray surging, in order to avoid wound or sever fin.
The 4th, monolithic cast iron fin plate is carried out sealing surface fine finishining, improve quality of fit, with anti-leak.
The 5th, assemble a pair of cast iron fin plate, on the special frock that is provided with, carry out a property detection of oozing of body, sealing surface is carried out air seal test, carry out the static withstand voltage test of normal temperature after qualified, simulate the dynamic test of worst hot case at last.
The 6th, assembling sponge grease coma on a pair of cast iron fin plate of entrance point, the thickness length of the material of sponge grease coma and shape thereof is curved straight, should be selected by design according to the height density of fin, again by special explained hereafter.Sponge grease coma to assembling on the special frock that is provided with carries out the high temperature gas flow washout test, but by design code detect the sponge grease coma be compressed distortion should resilience, volume-diminished is not more than original 10% and is.
The 7th, assembling cast-iron air preheater integral body is carried out the air seal test of body and sealing surface on the special frock that is provided with.
The foregoing description is the utility model preferred implementation; but embodiment of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spiritual essence of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.
Claims (7)
1. the highly effective air preheater of an anti-flue gas erosion comprises preheater shell, elastic sealing structure and cast iron fin plate shape heat exchange element, and the cast iron fin plate is made up of substrate and fin, and the material of heat exchange element is a cast iron; Substrate adopts plane or undaform; Fin is discontinuous, and the outline of the shape of its single fin can be rectangle or ligulate or fan-shaped or circular or aciculiform; Cross section can be and flows spindle line style or the streamlined or flat bow type of part spindle fully; Fin thickness is 2-8mm; Arranging of the fin of heat exchange element is block form, or alternating expression, or eccentric alternating expression; It is characterized in that: the fin height of heat exchange element is the 8-80mm equal altitudes; Fin density is that 5-110mm equidistantly distributes; The gas approach end is filled with multi-functional sponge-type metal.
2. according to the highly effective air preheater of the described a kind of anti-flue gas erosion of claim 1, it is characterized in that: the fin height of heat exchange element is the mixing height fin of 8-80mm;
3. according to the highly effective air preheater of the described a kind of anti-flue gas erosion of claim 1, it is characterized in that: the fin density of heat exchange element is the mixing spacing distribution fin of 5-110mm;
4. according to the highly effective air preheater of the described a kind of anti-flue gas erosion of claim 1, it is characterized in that: flue gas and the air shell of flow process separately are rectangular configuration, runner in the cross section is approximate rectangular runner, and its four angles are the corners that have obvious circular arc, and its arc radius is not less than 20mm.
5. according to the highly effective air preheater of the described a kind of anti-flue gas erosion of claim 1, it is characterized in that: the sealing between the cast iron fin plate is to separate flue gas and air two media by the expanded graphite bar primary seal of the undaform resilient blade of tongue and groove, bottom land and filling thereof; Sealing between two flow processs is fastening by the bolt and nut of band elastic washer.
6. according to the highly effective air preheater of the described a kind of anti-flue gas erosion of claim 1, it is characterized in that: portion of gas approach end office (EO) zone filling sponge broken nitre of type metal or metal fibre agglomerate.
7. according to the highly effective air preheater of the described a kind of anti-flue gas erosion of claim 1, it is characterized in that: the mounting bracket both sides of air preheater have nut screw mandrel adjustment structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200092421U CN201443778U (en) | 2009-03-20 | 2009-03-20 | Highly-effective air preheater resisting flue gas erosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200092421U CN201443778U (en) | 2009-03-20 | 2009-03-20 | Highly-effective air preheater resisting flue gas erosion |
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| Publication Number | Publication Date |
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| CN201443778U true CN201443778U (en) | 2010-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009200092421U Expired - Lifetime CN201443778U (en) | 2009-03-20 | 2009-03-20 | Highly-effective air preheater resisting flue gas erosion |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121707A (en) * | 2011-04-22 | 2011-07-13 | 茂名重力石化机械制造有限公司 | Air preheater for cast iron on high-head fins |
| CN102155745A (en) * | 2011-04-22 | 2011-08-17 | 茂名重力石化机械制造有限公司 | Cast iron air preheater |
| CN102269420A (en) * | 2010-06-02 | 2011-12-07 | 中国石油化工集团公司 | Cast iron plate-type air preheater |
| WO2016045175A1 (en) * | 2014-09-24 | 2016-03-31 | 中科苏派能源科技靖江有限公司 | Ceramic heat-exchanging plate and ceramic heat-exchanging core assembled thereby |
| WO2016045174A1 (en) * | 2014-09-24 | 2016-03-31 | 中科苏派能源科技靖江有限公司 | Ceramic heat exchanging plate and air pre-heater assembled thereby |
| WO2016123912A1 (en) * | 2015-02-03 | 2016-08-11 | 冯伶 | Ultra-thin steel plate type heating radiator |
-
2009
- 2009-03-20 CN CN2009200092421U patent/CN201443778U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269420A (en) * | 2010-06-02 | 2011-12-07 | 中国石油化工集团公司 | Cast iron plate-type air preheater |
| CN102269420B (en) * | 2010-06-02 | 2013-06-05 | 中国石油化工集团公司 | Cast iron plate-type air preheater |
| CN102121707A (en) * | 2011-04-22 | 2011-07-13 | 茂名重力石化机械制造有限公司 | Air preheater for cast iron on high-head fins |
| CN102155745A (en) * | 2011-04-22 | 2011-08-17 | 茂名重力石化机械制造有限公司 | Cast iron air preheater |
| CN102155745B (en) * | 2011-04-22 | 2012-07-25 | 茂名重力石化机械制造有限公司 | Cast iron air preheater |
| CN102121707B (en) * | 2011-04-22 | 2013-04-17 | 茂名重力石化机械制造有限公司 | Air preheater for cast iron on high-head fins |
| WO2016045175A1 (en) * | 2014-09-24 | 2016-03-31 | 中科苏派能源科技靖江有限公司 | Ceramic heat-exchanging plate and ceramic heat-exchanging core assembled thereby |
| WO2016045174A1 (en) * | 2014-09-24 | 2016-03-31 | 中科苏派能源科技靖江有限公司 | Ceramic heat exchanging plate and air pre-heater assembled thereby |
| US10168101B2 (en) | 2014-09-24 | 2019-01-01 | Cas Super Energy Technology Jingjiang Ltd. | Ceramic heat exchange plate and air pre-heater assembled thereby |
| US10175007B2 (en) | 2014-09-24 | 2019-01-08 | Cas Super Energy Technology Jingjiang Ltd. | Ceramic heat exchange plate and ceramic heat exchange core assembled thereby |
| WO2016123912A1 (en) * | 2015-02-03 | 2016-08-11 | 冯伶 | Ultra-thin steel plate type heating radiator |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 525024 Guangdong City, Maoming Province Ring West Road, No. 91 Patentee after: Maoming gravity Petrochemical Equipment Co Ltd Address before: 525024 Guangdong City, Maoming Province Ring West Road, No. 91 Patentee before: The Challenge Petrochemical Machinery Corporation |
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| CX01 | Expiry of patent term |
Granted publication date: 20100428 |
|
| CX01 | Expiry of patent term |