CN204829998U - Hierarchical retrograde rotation's regenerative air preheater - Google Patents
Hierarchical retrograde rotation's regenerative air preheater Download PDFInfo
- Publication number
- CN204829998U CN204829998U CN201520500959.1U CN201520500959U CN204829998U CN 204829998 U CN204829998 U CN 204829998U CN 201520500959 U CN201520500959 U CN 201520500959U CN 204829998 U CN204829998 U CN 204829998U
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- rotor
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- air
- bearing
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- 230000001172 regenerating effect Effects 0.000 title claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 19
- 239000003546 flue gas Substances 0.000 abstract description 19
- 238000007789 sealing Methods 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 1
- 239000003517 fume Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005338 heat storage Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000009998 heat setting Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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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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- Air Supply (AREA)
Abstract
The utility model provides a hierarchical retrograde rotation's regenerative air preheater, relates to and utilizes low warm flue gas to carry out the equipment that heats to the cold air. This air heater includes shell, rotor, bearing, flue gas passageway and air duct, the rotor include the two -stage at least, multistage rotor tandem arrangement is equipped with reverse transmission between the rotation axis of adjacent two -stage rotor, adjacent two -stage rotor direction of rotation is opposite to the adjacency channel juncture is equipped with radial seal between adjacent two -stage rotor, and the rotor between adjacent two -stage rotor is equipped with the circumference sealing member with shell gap department. Through front and back level rotor direction of rotation's difference, heat by air cooling's rotor heat accumulation piece reduction boiler exhaust gas temperature's deviation in turn with the both sides flue gas in the air heater flue to partial flue gas gets into the dew point district too early in avoiding the air heater flue, reduces cold junction heat accumulation piece dewfall, is stained with ash, corruption, jam scheduling problem, reduces boiler exhaust gas temperature, improves boiler efficiency.
Description
Technical field
The utility model relates to the equipment that thermal power plant back-end ductwork utilizes Low Temperature Thermal flue gas to heat cold air, belongs to the energy and fume afterheat utilizes technical field.
Background technology
Energy-saving and emission-reduction become the much-talked-about topic that the whole world is paid close attention to the most gradually, improve energy utilization rate, reduce energy resource consumption, have just like become the history important task that all trades and professions researcher bears.And the support industry that electric power constantly improves as industrial development and social economy, the coal resources of wherein heat power station consumption account for the half of coal total flow, and energy resource structure is in very important position.
For thermal power generation unit, under the condition of same steam parameter, boiler efficiency is the most critical factor affecting unit coal consumption.Under the present art, boiler design efficiency is mostly more than 92%, and in the loss of its efficiency, flue gas loss still stands in the breach.The reason that flue gas loss is difficult to decline is that utilizing air preheater to heat cooler needs to ensure that certain temperature and pressure are to reduce air preheater material cost on the one hand, the low-temperature space of design air preheater heating surface to be tried one's best on the other hand not in cold end corrosion temperature range, and the gas temperature windage of the fume side direction of rotation upstream and downstream that the latter causes due to rotary air preheater architectural characteristic, the minimum point of exhaust gas temperature is restricted further.The restriction of comprehensive several respects above, the exhaust gas temperature in current thermal power plant generally all designs at about 130 DEG C.
Along with entire society is in recent years to the attention increasingly of energy-saving and emission-reduction, State-level puts into effect more and more, more and more tighter energy-saving and emission-reduction policies, Thermal Power Generation Industry starts the efficiency managing to improve boiler accessory machinery from all angles, utilizes mainly contain low-level (stack-gas) economizer, middle temperature economizer, low low-level (stack-gas) economizer etc. at present for fume afterheat.But way basic is at present all the waste heat of air preheater is used for heat-setting water (or part feedwater) drawing gas with alternative steam turbine, and then improve the workmanship ability of steam turbine.But due to rotary regenerative air preheater workmanship ability lower (, about 20%, heated feed water is about 50% for the efficiency of heat-setting water), directly cause the utilization rate of waste heat of flue gas not high.
Utility model content
The purpose of this utility model is the rotary regenerative air preheater proposing a kind of classification counter-rotating, is intended to the limitation breaking through the utilization of domestic residual heat of smoke from boiler of fossil power plant, finds the way reducing exhaust gas temperature, improve boiler efficiency further from source.
The technical solution of the utility model is as follows:
A kind of rotary regenerative air preheater of classification counter-rotating, comprise shell, setting rotor, bearing, exhaust gases passes and air duct in the enclosure, it is characterized in that: described rotor at least comprises two-stage, multi-stage rotor arranged in series, each rotor is arranged in upper and lower pair of bearings respectively; Between the rotating shaft of adjacent two-stage rotor, be provided with reverse transmission device, adjacent two-stage rotor direction of rotation is contrary; Between adjacent two-stage rotor, adjacency channel intersection is provided with radial seal, and the rotor between adjacent two-stage rotor and housing slot place are provided with circumferential seal.
Technical characteristic of the present utility model is also: the upper bearing (metal) of each rotor rotating shaft adopts guide bearing, and the lower bearing of each rotor rotating shaft adopts thrust bearing.
The utility model compared with prior art, have the following advantages and the technique effect of high-lighting: 1. the utility model make the flue gas of both sides in air preheater flue alternately heating by air cooled rotor heat storage plate, greatly reduce the deviation of exhaust gas temperature, thus avoid partial fume in air preheater flue to enter dew point district too early.2. the utility model is by correcting the deviation of exhaust gas temperature, reduces the thermal deviation of air preheater heat storage plate direction of rotation further, avoids cold junction heat storage plate to condense, be stained with the problem such as ash, burn into blocking.3. by enforcement of the present utility model, under the prerequisite that the minimum exhaust gas temperature in local is identical, further exhaust gas temperature can be designed downwards, directly improves boiler efficiency.
Accompanying drawing explanation
Fig. 1 is conventional rotary regenerative air preheater schematic diagram.
Fig. 2 is the structural representation of the rotary regenerative air preheater embodiment of a kind of classification counter-rotating of the present utility model.
In figure: 1 ?shell; 2 ?rotor; 2a ?upper level rotor; 2b ?next stage rotor; 3 ?bearing; 3a ?upper level rotor bearing; 3b ?next stage rotor bearing; 4 ?reverse transmission device; 5a ?radial seal; 5b ?circumferential seal.
Detailed description of the invention
Below in conjunction with accompanying drawing, operation principle of the present utility model, concrete structure and a kind of implementation method are described further:
Fig. 1 is conventional rotary regenerative air preheater structural representation, and its basic structure comprises shell 1, rotor 2 and the parts such as bearing 3 and sealing device.Shell, sealing device and import and export air channel, flue and rotary regenerative air preheater is divided into fume side and head-on air side two parts.The rotor in this region heats through fume side by heat smoke from the top down, by the rotor diverted air side after heating, and then by the air heat that flows from bottom to top in this region.Owing to being gradually cooled as it passes through the cooler in rotating past air side clockwise by the rotor heated, then first the air section temperature of rotor of process is high, then the air section temperature of rotor of process is low, thus cause the regional air of first process higher by the temperature heated, after through regional air also lower by the temperature heated.Rotor after cooled turns through fume side more gradually clockwise, and then be gradually heated by the sonochemical activity, the fume side temperature of rotor of first process can be caused as a same reason low, flue-gas temperature declines fast, after through region temperature of rotor higher, flue-gas temperature declines slow, thus causes the region flue-gas temperature of first process low, after through region flue-gas temperature high, thus the circumferential deviation of cigarette temperature causing air preheater to export.
The structural representation of the rotary regenerative air preheater of a kind of classification counter-rotating that Fig. 2 provides for the utility model, its basic structure comprises shell 1, setting at least two-stage rotor, exhaust gases passes and air duct in the enclosure, multi-stage rotor arranged in series, each rotor is arranged in upper and lower pair of bearings respectively, as shown in Figure 2, the present embodiment adopts two-stage rotor inline to arrange, upper level rotor 2a is arranged on upper level rotor bearing 3a; Next stage rotor 2b is arranged on next stage rotor bearing 3b; Between the rotating shaft of adjacent two-stage rotor, be provided with reverse transmission device 4, make adjacent two-stage rotor direction of rotation contrary; Between adjacent two-stage rotor, adjacency channel intersection is provided with radial seal 5a, and the rotor between adjacent two-stage rotor and housing slot place are provided with circumferential seal 5b.The upper bearing (metal) of each rotor rotating shaft adopts guide bearing, and the lower bearing of each rotor rotating shaft adopts thrust bearing.Shell, sealing device and import and export air channel, flue and equally rotary regenerative air preheater is divided into fume side and air side two parts; Because rotor portion comprises upper and lower two-stage, then fume side comprises again high-temperature flue gas side and low-temperature flue gas side, and air side comprises again high temperature air side and Cryogenic air side.The rotor in this region heats respectively through high-temperature flue gas side and low-temperature flue gas side by heat smoke from the top down, is turned to high temperature air side and Cryogenic air side respectively by the rotor after heating is reverse, and then by the air heat that flows from bottom to top in this region.Due to the counter-rotating of two-stage rotor, the low-temperature flue gas circumference deviation of the high-temperature flue gas of upper level circumference gas temperature windage and next stage is cancelled out each other, thus causes air preheater outlet gas temperature windage greatly to reduce.
Claims (2)
1. the rotary regenerative air preheater of a classification counter-rotating, comprise shell (1), setting rotor (2), bearing (3), exhaust gases passes and air duct in the enclosure, it is characterized in that: described rotor at least comprises two-stage, multi-stage rotor arranged in series, each rotor is arranged in upper and lower pair of bearings respectively; Between the rotating shaft of adjacent two-stage rotor, be provided with reverse transmission device (4), adjacent two-stage rotor direction of rotation is contrary; Between adjacent two-stage rotor, adjacency channel intersection is provided with radial seal (5a), and the rotor between adjacent two-stage rotor and housing slot place are provided with circumferential seal (5b).
2. according to the rotary regenerative air preheater of a kind of classification counter-rotating according to claim 1, it is characterized in that: the upper bearing (metal) of each rotor rotating shaft adopts guide bearing, the lower bearing of each rotor rotating shaft adopts thrust bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520500959.1U CN204829998U (en) | 2015-07-10 | 2015-07-10 | Hierarchical retrograde rotation's regenerative air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520500959.1U CN204829998U (en) | 2015-07-10 | 2015-07-10 | Hierarchical retrograde rotation's regenerative air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204829998U true CN204829998U (en) | 2015-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520500959.1U Expired - Fee Related CN204829998U (en) | 2015-07-10 | 2015-07-10 | Hierarchical retrograde rotation's regenerative air preheater |
Country Status (1)
| Country | Link |
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| CN (1) | CN204829998U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020736A (en) * | 2015-07-10 | 2015-11-04 | 清华大学 | Rotary air preheater with hierarchical reverse rotation |
-
2015
- 2015-07-10 CN CN201520500959.1U patent/CN204829998U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020736A (en) * | 2015-07-10 | 2015-11-04 | 清华大学 | Rotary air preheater with hierarchical reverse rotation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151202 |
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| CF01 | Termination of patent right due to non-payment of annual fee |