CN202195502U - Constant-temperature starting type air pre-heater - Google Patents
Constant-temperature starting type air pre-heater Download PDFInfo
- Publication number
- CN202195502U CN202195502U CN2011202733969U CN201120273396U CN202195502U CN 202195502 U CN202195502 U CN 202195502U CN 2011202733969 U CN2011202733969 U CN 2011202733969U CN 201120273396 U CN201120273396 U CN 201120273396U CN 202195502 U CN202195502 U CN 202195502U
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- pipe
- temperature
- constant
- heat pipe
- 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
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Abstract
The utility model relates to a constant-temperature starting type air pre-heater, which is characterized by being composed of a hot air pipe and a cold air pipe which are connected together through a clapboard; a hot pipe passing among the hot air pipe, the clapboard and the cold air pipe is composed of an evaporation section positioned in the hot air pipe and a condensation section positioned in the cold air pipe; the hot pipe is a constant-temperature starting type hot pipe; the constant-temperature starting type hot pipe is pre-set with a starting temperature at which the hot pipe begins to carry out heat exchange; heat exchange is not carried out below the pre-set temperature; and, only when the smoke discharge temperature is higher that the pre-set temperature of a constant-temperature starting type component, the heat exchange begins.
Description
Technical field
The utility model relates to a kind of constant temperature and starts the formula air preheater.
Background technology
Rotary regenerative air heater is the facility of thermal power plant, is used for the heat exchange of flue gas and air.
Rotary regenerative air preheater is the flue gas tail end heat-exchanger rig that generally adopts on power plant's large-sized boiler; Compare with tubular air preheater; Rotary regenerative air preheater has that compact conformation, volume are little, heat-transfer surface density height, complete machine light weight, metal consumption are few, be beneficial to mounting arrangements, cold end corrosion than characteristics such as pipe heat exchanger are light; Be suitable on large-sized boiler, using; But that the shortcoming of rotary regenerative air preheater is an inleakage is big, be 6%～8% when operating mode is good, be 20%～30% during poor sealing.The complex structure of rotary regenerative air preheater, manufacturing process and installation requirement are high in addition, the operation maintenance workload is big, and hot automatic control is also comparatively difficult.Higher inleakage causes that preheater inlet blast reduces, the blower fan electric current raises, and the excess air coefficient behind the preheater raises, afterbody smoke discharging temperature drop is low, boiler thermal output reduces, coal-fired loss increases, and boiler does not reach rated load.
The utility model content
The utility model relates to a kind of constant temperature and starts the formula air preheater, as the final stage air preheater of large electric power plant boiler, promptly substitutes existing rotary regenerative air heater commonly used, can control exhaust gas temperature accurately, and exhaust gas temperature does not change with working conditions change.
The technical scheme of the utility model is following: a kind of constant temperature starts the formula air preheater; Form by warm-air pipe that links together through dividing plate and cool air hose; It is characterized in that constituting by evaporator section that is positioned at warm-air pipe and the condensation segment that is positioned at cool air hose through the heat pipe between warm-air pipe, dividing plate and the cool air hose; This heat pipe is that constant temperature starts heat pipe, and this constant temperature starts heat pipe and preestablishes the start-up temperature that heat pipe begins heat exchange.
The advantage of the utility model is following:
A., the heat pipe of this band constant temperature function is set in the air preheater, and it is not heat exchange under predefined temperature, has only when exhaust gas temperature is higher than just to begin to start when constant temperature starts the predefined temperature of formula element and carries out heat exchange.Can ensure that with this exhaust gas temperature of boiler is a steady state value, it does not fluctuate with boiler working condition.
B. the heat pipe inwall is lined with Copper Foil, makes this heat pipe become the long-lived heat pipe of " molten steel is incompatible ", can guarantee that the air preheater life-span reaches 20 years.
C. satisfy of the functional requirement of thermoelectricity boiler fully to air preheater.The air preheater of band constant temperature function is non-rotary, does not therefore have the problem of leaking out of rotary regenerative air heater.Can lower gross coal consumption rate, and lower the power consumption of air-introduced machine.Use the air preheater of band constant temperature function, can control exhaust gas temperature accurately, and exhaust gas temperature does not change with working conditions change.Utilize this characteristics, can the exhaust gas temperature design of thermoelectricity boiler be hanged down about 15 ℃, can improve boiler efficiency like this more than 1%, and be unlikely under special operation condition, to meet with the dew point corrosion problem.
Description of drawings
Fig. 1 is the structural representation of the utility model.
The specific embodiment
Further specify in conjunction with accompanying drawing:
This constant temperature starts the formula air preheater; Form by the warm-air pipe 1 of high-temperature flue gas that flows, the cool air hose 2 and the dividing plate 3 of moving air; The closed heat pipe 4 that is applied between warm-air pipe 1, dividing plate 3 and the cool air hose 2 is made up of evaporator section that is arranged in warm-air pipe 6 and the condensation segment 5 that is positioned at cool air hose; This heat pipe is that constant temperature starts heat pipe, and this constant temperature starts heat pipe and preestablishes the start-up temperature that heat pipe begins heat exchange.
The air preheater of the band constant temperature function of the utility model and existing rotary regenerative air heater compare:
The energy-saving effect of the air preheater of the band constant temperature function of use the utility model:
Judge more roughly according to above, can improve the efficient of boiler about 1.5%.
Claims (2)
1. a constant temperature starts the formula air preheater; It is characterized in that forming by warm-air pipe that links together through dividing plate and cool air hose; Constitute by evaporator section that is positioned at warm-air pipe and the condensation segment that is positioned at cool air hose through the heat pipe between warm-air pipe, dividing plate and the cool air hose; Described heat pipe is that constant temperature starts heat pipe, and this constant temperature starts heat pipe and preestablishes the start-up temperature that heat pipe begins heat exchange.
2. constant temperature according to claim 1 starts the formula air preheater, it is characterized in that said heat pipe inwall is lined with Copper Foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202733969U CN202195502U (en) | 2011-07-29 | 2011-07-29 | Constant-temperature starting type air pre-heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202733969U CN202195502U (en) | 2011-07-29 | 2011-07-29 | Constant-temperature starting type air pre-heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202195502U true CN202195502U (en) | 2012-04-18 |
Family
ID=45950407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202733969U Expired - Lifetime CN202195502U (en) | 2011-07-29 | 2011-07-29 | Constant-temperature starting type air pre-heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202195502U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615905A (en) * | 2013-10-23 | 2014-03-05 | 佛山市广旭节能自动化科技有限公司 | Waste heat utilization system of continuous heat accumulating type industrial furnace |
-
2011
- 2011-07-29 CN CN2011202733969U patent/CN202195502U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615905A (en) * | 2013-10-23 | 2014-03-05 | 佛山市广旭节能自动化科技有限公司 | Waste heat utilization system of continuous heat accumulating type industrial furnace |
| CN103615905B (en) * | 2013-10-23 | 2018-01-26 | 广东裕方建设工程有限公司 | Continuous heat accumulation type industrial furnace afterheat utilizing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120418 |