CN2077086U - Spiral slot tube type air preheater - Google Patents
Spiral slot tube type air preheater Download PDFInfo
- Publication number
- CN2077086U CN2077086U CN90212375U CN90212375U CN2077086U CN 2077086 U CN2077086 U CN 2077086U CN 90212375 U CN90212375 U CN 90212375U CN 90212375 U CN90212375 U CN 90212375U CN 2077086 U CN2077086 U CN 2077086U
- Authority
- CN
- China
- Prior art keywords
- air preheater
- tube
- spiral slot
- spiral grooved
- grooved tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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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Abstract
The utility model relates to a spiral slot tube type air preheater which is an air preheater used for boilers. The spiral slot tube type air preheater is mainly composed of an upper tube plate, a lower tube plate, a baffle plate, a guard plate and spiral slot tubes, wherein, spiral slots on the spiral slot tubes are recessed in the spiral slot tubes, the spiral slot outside the tube forms a concave shape, the spiral slot inside the tube forms a convex shape, and the arrangement of the spiral slot tubes can be uniform arrangement with equal diameter as well as nonuniform arrangement with different diameters. The utility model which has the advantages of high thermal efficiency, low coal consumption, low exhaust gas temperature, etc. can be widely used for industrial boilers and power plant boilers and can solve the problems of corrosion and ash clogging.
Description
A kind of spiral grooved tube regenerative air heater that uses under occasions such as boiler of power plant, Industrial Boiler belongs to technical field of heat exchange.
Boiler mainly contains tubular type, swinging, heat pipe-type and cast iron type with air preheater at present.The subject matter that tubular air preheater exists is: 1) bulky; 2) low-temperature zone corrosion and the stifled grey problem that causes thus are serious.Therefore the application of tubular air preheater on heavy duty boiler and the further raising of boiler thermal output have been limited.Though rotary regenerative air preheater is a compact heat exchanger, problem such as its exists leaks out, stifled ash, power consumption are big has also limited the raising of boiler thermal output, and leak out, stifled grey problem still belongs to a more scabrous difficult problem.Heat pipe preheater exists because of fin is arranged, and has the dust stratification problem on Industrial Boiler, and dust stratification will be more serious in station boiler, and still have etching problem, in addition, heat pipe cost height, the life-span is short.Cast iron type air preheater heaviness is not suitable for station boiler.
Goal of the invention of the present utility model is at above-mentioned deficiency, proposes a kind of heat transfer efficiency height, and coal consumption is low, the spiral grooved tube regenerative air heater that cost is low, and it solves the problem of corrosion one stifled ash preferably.
The utility model is mainly by upper perforated plate (1), dividing plate (2), lower perforated plate (3), pipe, backplate (5) is formed, wherein, straight tube is spiral grooved tube (6), promptly on straight tube, be provided with helicla flute, this helicla flute is recessed into straight tube, outside pipe, be concavity, in pipe, be convex, the arrangement of spiral grooved tube can be the evenly distributed of equal diameter spiral grooved tube, it also can be the non-homogeneous arrangement of non-equal diameter spiral grooved tube, and comparatively ideal arrangement is in the sparse arrangement of adopting the major diameter spiral grooved tube near the air intake zone, in the dense arrangement of adopting the minor diameter spiral grooved tube near the air outlet slit zone.Spiral grooved tube passes upper and lower tube sheet and dividing plate, and flue gas is made axial flow in pipe, and air laterally streams tube bank outside pipe, like this, just can obtain the effect of air preheat.
Compared with prior art, it has increased heat transfer area because the utility model has adopted the high helicla flute of heat transfer efficiency, and heat-transfer capability obviously increases, and the comparable light pipe of exothermic coefficient improves about 1 times in the pipe of this pipe, and the pipe wall temperature then can improve more than 20～30 ℃.Because the spiral grooved tube heat-transfer capability is strong, air preheater can adopt than major diameter (as φ 50, φ 60 or φ 65mm) pipe manufacturing, and big pipe is difficult for stifled ash, can solve the stifled grey problem of the φ 40mm pipe that generally adopts at present.In addition, also can the arrangement situation and the pipe diameter of air preheater be done suitably to adjust according to the height of air themperature.For example the air intlet in tube bank partly adopts bigger pitch and caliber, as shown in Figure 5, allows the pipe wall temperature further improve.Like this, the corrosion of tubular air preheater can better be solved once stifled grey problem.Because the utility model can be implemented under the constant situation of heating surface area according to user's needs, improve heat transfer coefficient and heat exchange amount, reduce exhaust gas temperature; Under the constant situation of heat exchange amount, heating surface area can be reduced, thereby steel can be saved, so the utility model also has the heat transfer efficiency height, the low and low cost and other advantages of coal consumption.
Fig. 1 is the utility model structural representation.
Fig. 2 is the cutaway view of two runner spiral grooved tube regenerative air heaters.
Fig. 3 is the spiral grooved tube schematic diagram.
Fig. 4 is the A-A partial sectional view of spiral grooved tube.
Fig. 5 is a kind of arrangement schematic diagram of spiral grooved tube.
The utility model can be realized by following: it is 40～65 millimeters common light pipes that spiral grooved tube can be selected diameter, roll extrusion or cold rolling forming on lathe or special equipment, the degree of depth of its helicla flute (6) is 0.8～3 millimeter, pitch is 10～40 millimeters, spiral grooved tube can be selected non-homogeneous arrangement, promptly is divided into two zones according to the air flow process; Near the air intlet zone, restrain the arrangement of selecting for use the major diameter spiral grooved tube to combine with coarse pitch; In close air outlet slit zone, the arrangement that tube bank selects for use narrow tube to combine with fine pith, specifically, in entry zone, can select 60～65 millimeters spiral grooved tube for use, pitch can be selected 90～95 millimeters, at exit region, can select 40～50 millimeters spiral grooved tube for use, pitch is selected 65～85 millimeters.Steel plate is adopted in upper and lower tube sheet (1) and (3), and offer thereon and the corresponding through hole of spiral grooved tube, and it is enclosed within on the spiral grooved tube and its weldering is dead, backplate (5) is installed around spiral grooved tube, just formed the hexahedron bobbin carriage thus, if bobbin carriage is higher, then can set up some dividing plates (2) at bobbin carriage middle part or corresponding site, promptly constitute multithread road air preheater (as shown in Figure 2).The size of bobbin carriage and quantity can be determined according to the situation of boiler.For example: for Industrial Boiler, air preheater generally is made up of a bobbin carriage, and Fig. 2 is the spiral grooved tube regenerative air heater of joining 6～6.5t/ boiler, and the length of bobbin carriage is of a size of 1900 * 630 * 1620mm bobbin carriage and is made up of 294 spiral grooved tubes.
For station boiler, the spiral grooved tube air preheater can be made up of a plurality of bobbin carriages, bobbin carriage number and boiler capacity, the required heating-up temperature of air, and make, transportation, install, factors such as convenience that maintenance is changed are relevant.Boiler capacity is big more, and bobbin carriage and number of tubes are many more, and as to joining the air preheater of 300MW capacity boiler, the bobbin carriage number can reach tens of to up to a hundred.For the air preheater of multitube case, adopt combination in parallel and series connection between the bobbin carriage simultaneously.Concrete condition is calculated by boiler heating power and is determined.
Claims (5)
1, a kind of air preheater that is applicable to station boiler, Industrial Boiler and other air heat is made up of upper perforated plate (1), dividing plate (2), lower perforated plate (3), straight tube and backplate (5), it is characterized in that the straight tube that the utility model adopts is spiral grooved tube (6).
2, air preheater according to claim 1 is characterized in that helicla flute is recessed into straight tube, is concavity outside pipe, is convex in pipe.
3, air preheater according to claim 1 is characterized in that the arrangement of spiral grooved tube (6) can be adopted the evenly distributed of equal diameter spiral grooved tube, also can adopt the non-homogeneous arrangement of non-equal diameter spiral grooved tube.
4,, it is characterized in that in the sparse arrangement of adopting the major diameter spiral grooved tube near the air intlet zone, in the dense arrangement of adopting the minor diameter spiral grooved tube near the air outlet slit zone according to claim 1 or 3 described air preheaters.
5, air preheater according to claim 1, the diameter that it is characterized in that spiral grooved tube are between 40～65 millimeters, and the spiral fluted degree of depth is 0.8～3 millimeter, and pitch is 10～40 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN90212375U CN2077086U (en) | 1990-06-21 | 1990-06-21 | Spiral slot tube type air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN90212375U CN2077086U (en) | 1990-06-21 | 1990-06-21 | Spiral slot tube type air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2077086U true CN2077086U (en) | 1991-05-15 |
Family
ID=4891932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90212375U Expired - Lifetime CN2077086U (en) | 1990-06-21 | 1990-06-21 | Spiral slot tube type air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2077086U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858589A (en) * | 2010-06-23 | 2010-10-13 | 伟明环保设备有限公司 | Biomass fuel boiler |
| CN106247617A (en) * | 2016-08-30 | 2016-12-21 | 宁波市鄞州红杉树电器制造有限公司 | A kind of warm-air drier of improvement |
| CN108050536A (en) * | 2017-11-30 | 2018-05-18 | 江苏中科重工股份有限公司 | Low-temperature air preheater |
| CN109780896A (en) * | 2019-02-18 | 2019-05-21 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of high-temperature cooler Pipe bundle structure and high-temperature cooler |
-
1990
- 1990-06-21 CN CN90212375U patent/CN2077086U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858589A (en) * | 2010-06-23 | 2010-10-13 | 伟明环保设备有限公司 | Biomass fuel boiler |
| CN106247617A (en) * | 2016-08-30 | 2016-12-21 | 宁波市鄞州红杉树电器制造有限公司 | A kind of warm-air drier of improvement |
| CN108050536A (en) * | 2017-11-30 | 2018-05-18 | 江苏中科重工股份有限公司 | Low-temperature air preheater |
| CN108050536B (en) * | 2017-11-30 | 2019-10-29 | 江苏中科重工股份有限公司 | Low-temperature air preheater |
| CN109780896A (en) * | 2019-02-18 | 2019-05-21 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of high-temperature cooler Pipe bundle structure and high-temperature cooler |
| CN109780896B (en) * | 2019-02-18 | 2019-10-11 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of high-temperature cooler Pipe bundle structure and high-temperature cooler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |