CN103884019A - Graphite-tube type low-temperature air preheater - Google Patents
Graphite-tube type low-temperature air preheater Download PDFInfo
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- CN103884019A CN103884019A CN201410065514.5A CN201410065514A CN103884019A CN 103884019 A CN103884019 A CN 103884019A CN 201410065514 A CN201410065514 A CN 201410065514A CN 103884019 A CN103884019 A CN 103884019A
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- heat exchanger
- graphite
- exchanger tube
- tube
- perforated plate
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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 invention discloses a graphite-tube type low-temperature air preheater which comprises a heat exchanger shell provided with a flue gas inlet and a flue gas outlet. The heat exchanger shell is further provided with a heat exchange tube box provided with an air inlet and an air outlet. The heat exchange tube box comprises an upper tube plate and a lower tube plate, a heat exchange tube which is a graphite tube is arranged between the upper tube plate and the lower tube plate, the lower tube plate is provided with a stepped hole, a seal groove is arranged inside the large diameter of the stepped hole, the lower end of the heat exchange tube is arranged in the large diameter and is sealed through a graphite sealing ring arranged inside the seal groove, a seal cavity is formed in the upper end of the upper tube plate, the upper end of the heat exchange tube is arranged in the seal cavity, graphite packing is arranged at the lower end of the seal cavity, and a compression ring is arranged at the upper end of the graphite packing. Compared with the prior art, the graphite-tube type low-temperature air preheater has the advantages of good corrosion resistance and heat resistance performance, metal consumption on the heat-absorbing surface is reduced, and the problems that the inside wall surface of the tube on the heat-absorbing surface is prone to abrasion, dust stratification and low-temperature corrosion are solved.
Description
Technical field
The present invention relates to a kind of heat exchanger, especially a kind of preheater for low temperature air heat-exchange in boiler.
Background technology
Air reheater in boiler plant is positioned at the region that boiler smoke temperature is lower, and its pipe adopts smooth metal tube to form conventionally.Produced two problems because flue-gas temperature is low: the one, heat transfer coefficient is little, and pipe metal wastage used is relatively many, and another is that metallic walls face is prone to wearing and tearing, dust stratification and cold end corrosion problem inside the pipe of heating surface.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, and a kind of heat exchanger tube good seal performance and corrosion resistant graphite tubular type low-temperature air preheater are provided.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of graphite tubular type low-temperature air preheater, comprise the heat exchanger shell with gas approach and exhanst gas outlet, in described heat exchanger shell, be also provided with a heat exchanger tube bobbin carriage with air intlet and air outlet slit, described heat exchange tube case comprises upper perforated plate and lower perforated plate, between described upper perforated plate and lower perforated plate, be provided with heat exchanger tube, the upper end of described heat exchanger tube is communicated with described gas approach, the lower end of described heat exchanger tube is communicated with described exhanst gas outlet, it is characterized in that: described heat exchanger tube is graphite-pipe, on described lower perforated plate, be provided with a shoulder hole, in the large footpath of described shoulder hole, be provided with a seal groove, the lower end of described heat exchanger tube is arranged in large footpath, and by a graphite-seal ring sealing being arranged in seal groove, on the upper end of described upper perforated plate, be provided with an annular seal space, described heat exchanger tube upper end is arranged in described annular seal space, lower end at described annular seal space is provided with graphite packing, upper end in graphite packing is provided with pressure ring.
Be provided with internal thread in described upper perforated plate perforate upper end, described pressure ring is and the metal threaded pressure ring of the screw-internal thread fit of described upper perforated plate perforate.
Described heat exchanger tube adjacent layer on air-flow direction layout that is staggered.
The lower end of described heat exchanger tube is taper.
The present invention adopts the graphite-pipe of high temperature cabonization as heat exchanger tube, but brought the problem of sealing simultaneously, so the present invention has adopted the combination sealing mode of graphite packing and pressure ring in the upper end of heat exchanger tube, adopt the combination sealing mode of shoulder hole and graphite-seal ring in the lower end of heat exchanger tube, solving well after the problem of sealing.
Compared with prior art, the invention has the beneficial effects as follows:
1, high temperature cabonization graphite-pipe is a kind of novel high temperature resistant non-metallic pipe, compare with common metal pipe, there is good corrosion resistance and heat resistance, save heating surface metal wastage, and solved heating surface tube interior sidewall surface and easily occur wearing and tearing, dust stratification and cold end corrosion problem.
2, high temperature cabonization graphite-pipe and metal tube sheets adopt combined labyrinth and carbon gland, and good sealing effect, is difficult for leaking out, and has solved the free wxpansion problem of graphite-pipe under high-temperature condition, does not need comparatively loaded down with trivial details compensation arrangement, has reduced cost.
3, the coefficient of heat transfer of pipe inner side strengthens greatly, and this device coefficient of heat transfer reaches 60W/ (㎡ ℃ after testing), improve 2～3 times.Reduce exhaust gas temperature, increased the outlet temperature of air, improved the thermal efficiency.
4, increased the service life of equipment, this device under normal service condition, 10～15 years service life, and maintenance period is long.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the connection diagram of graphite-pipe of the present invention and lower perforated plate;
Fig. 3 is the connection diagram of graphite-pipe of the present invention and upper perforated plate;
Fig. 4 is the arrange schematic diagram of graphite-pipe of the present invention in air intlet inside.
Wherein: 1, heat exchanger shell, 2, gas approach, 3, exhanst gas outlet, 4, heat exchanger tube bobbin carriage, 5, air intlet, 6, air outlet slit, 7, heat exchanger tube, 8, upper perforated plate, 9, lower perforated plate, 10, graphite-seal ring, 11, metal threaded pressure ring, 12, graphite packing.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is elaborated:
As shown in Figure 1, a kind of graphite tubular type low-temperature air preheater, comprise the heat exchanger shell 1 with gas approach 2 and exhanst gas outlet 3, in heat exchanger shell, be also provided with a heat exchanger tube bobbin carriage 4 with air intlet 5 and air outlet slit 6, wherein heat exchanger tube bobbin carriage 4 comprises upper perforated plate 8 and lower perforated plate 9, between upper perforated plate 8 and lower perforated plate 9, be provided with heat exchanger tube 7, heat exchanger tube 7 layout that is staggered in the direction of Air Flow, referring to Fig. 4, thereby constantly change the flow direction of air, expand the contact area of air and heat exchanger tube.The upper end of heat exchanger tube 7 is communicated with gas approach 2, the lower end of heat exchanger tube 7 is communicated with exhanst gas outlet 3, heat exchanger tube 7 is graphite-pipe, on lower perforated plate, 9 are provided with a shoulder hole, in the large footpath of shoulder hole, are provided with a seal groove, and the lower end of heat exchanger tube 7 is arranged in large footpath, and seal by a graphite-seal ring 10 being arranged in seal groove, installation for the ease of heat exchanger tube 7 lower ends at lower perforated plate 9, taper is processed in the lower end of heat exchanger tube 7, as shown in Figure 2.On the upper end of upper perforated plate 8, be provided with an annular seal space, heat exchanger tube 7 upper ends are arranged in annular seal space, are provided with graphite packing 12 in the lower end of annular seal space, be provided with pressure ring 11 in the upper end of graphite packing 12, for the ease of better sealing effectiveness, pressure ring 11 preferable alloy threaded pressure rings, as shown in Figure 3.
Claims (4)
1. a graphite tubular type low-temperature air preheater, comprise the heat exchanger shell with gas approach and exhanst gas outlet, in described heat exchanger shell, be also provided with a heat exchanger tube bobbin carriage with air intlet and air outlet slit, described heat exchange tube case comprises upper perforated plate and lower perforated plate, between described upper perforated plate and lower perforated plate, be provided with heat exchanger tube, the upper end of described heat exchanger tube is communicated with described gas approach, the lower end of described heat exchanger tube is communicated with described exhanst gas outlet, it is characterized in that: described heat exchanger tube is graphite-pipe, on described lower perforated plate, be provided with a shoulder hole, in the large footpath of described shoulder hole, be provided with a seal groove, the lower end of described heat exchanger tube is arranged in large footpath, and by a graphite-seal ring sealing being arranged in seal groove, on the upper end of described upper perforated plate, be provided with an annular seal space, described heat exchanger tube upper end is arranged in described annular seal space, lower end at described annular seal space is provided with graphite packing, upper end in graphite packing is provided with pressure ring.
2. graphite tubular type low-temperature air preheater according to claim 1, is characterized in that: be provided with internal thread in described upper perforated plate perforate upper end, described pressure ring is and the metal threaded pressure ring of the screw-internal thread fit of described upper perforated plate perforate.
3. graphite tubular type low-temperature air preheater according to claim 1, is characterized in that: described heat exchanger tube adjacent layer on air-flow direction layout that is staggered.
4. graphite tubular type low-temperature air preheater according to claim 1, is characterized in that: the lower end of described heat exchanger tube is taper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410065514.5A CN103884019A (en) | 2014-02-26 | 2014-02-26 | Graphite-tube type low-temperature air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410065514.5A CN103884019A (en) | 2014-02-26 | 2014-02-26 | Graphite-tube type low-temperature air preheater |
Publications (1)
| Publication Number | Publication Date |
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| CN103884019A true CN103884019A (en) | 2014-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410065514.5A Pending CN103884019A (en) | 2014-02-26 | 2014-02-26 | Graphite-tube type low-temperature air preheater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106996576A (en) * | 2017-05-19 | 2017-08-01 | 青岛诚信环保科技有限公司 | A kind of novel energy-conserving heater |
| CN107860022A (en) * | 2017-11-28 | 2018-03-30 | 西安交通大学 | One kind becomes flue cross section tubular air preheater |
| CN108050536A (en) * | 2017-11-30 | 2018-05-18 | 江苏中科重工股份有限公司 | Low-temperature air preheater |
Citations (10)
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|---|---|---|---|---|
| US2281594A (en) * | 1940-12-27 | 1942-05-05 | William A Pearl | Sealing tubes to tube sheets of heat exchangers, and the like |
| GB1112265A (en) * | 1964-11-24 | 1968-05-01 | Fritz Schneider | Tubular heat exchanger |
| CN200968812Y (en) * | 2006-09-30 | 2007-10-31 | 殷志军 | Sealing device of pipe changeable graphite heat exchanger |
| CN200979381Y (en) * | 2006-05-26 | 2007-11-21 | 殷志军 | A combination multitubular graphite heat exchanger |
| CN101216263A (en) * | 2008-01-18 | 2008-07-09 | 河北工业大学 | Pipe shell type heat-exchanger |
| CN201462895U (en) * | 2009-07-01 | 2010-05-12 | 四平市东海石化设备制造有限公司 | Antiseptic wearable air pre-heater |
| CN201780037U (en) * | 2010-09-01 | 2011-03-30 | 中国海洋石油总公司 | Sealing device for graphite heat exchange tube in graphite heat exchanger |
| CN102109285A (en) * | 2011-03-02 | 2011-06-29 | 郑达伟 | Detachable shell and tube heat exchanger |
| CN102435091A (en) * | 2010-09-29 | 2012-05-02 | 南通五联品牌策划有限公司 | Single-tube floating shell and tube graphite heat exchanger |
| CN203837010U (en) * | 2014-02-26 | 2014-09-17 | 南通京通石墨设备有限公司 | Graphite pipe type low-temperature air preheater |
-
2014
- 2014-02-26 CN CN201410065514.5A patent/CN103884019A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2281594A (en) * | 1940-12-27 | 1942-05-05 | William A Pearl | Sealing tubes to tube sheets of heat exchangers, and the like |
| GB1112265A (en) * | 1964-11-24 | 1968-05-01 | Fritz Schneider | Tubular heat exchanger |
| CN200979381Y (en) * | 2006-05-26 | 2007-11-21 | 殷志军 | A combination multitubular graphite heat exchanger |
| CN200968812Y (en) * | 2006-09-30 | 2007-10-31 | 殷志军 | Sealing device of pipe changeable graphite heat exchanger |
| CN101216263A (en) * | 2008-01-18 | 2008-07-09 | 河北工业大学 | Pipe shell type heat-exchanger |
| CN201462895U (en) * | 2009-07-01 | 2010-05-12 | 四平市东海石化设备制造有限公司 | Antiseptic wearable air pre-heater |
| CN201780037U (en) * | 2010-09-01 | 2011-03-30 | 中国海洋石油总公司 | Sealing device for graphite heat exchange tube in graphite heat exchanger |
| CN102435091A (en) * | 2010-09-29 | 2012-05-02 | 南通五联品牌策划有限公司 | Single-tube floating shell and tube graphite heat exchanger |
| CN102109285A (en) * | 2011-03-02 | 2011-06-29 | 郑达伟 | Detachable shell and tube heat exchanger |
| CN203837010U (en) * | 2014-02-26 | 2014-09-17 | 南通京通石墨设备有限公司 | Graphite pipe type low-temperature air preheater |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106996576A (en) * | 2017-05-19 | 2017-08-01 | 青岛诚信环保科技有限公司 | A kind of novel energy-conserving heater |
| CN107860022A (en) * | 2017-11-28 | 2018-03-30 | 西安交通大学 | One kind becomes flue cross section tubular air preheater |
| CN107860022B (en) * | 2017-11-28 | 2023-10-24 | 西安交通大学 | Variable flue section tubular air preheater |
| 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 |
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Application publication date: 20140625 |
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