CN208139321U - A kind of rotary regenerative air heater utilizes secondary hot-air anti-blocking system - Google Patents
A kind of rotary regenerative air heater utilizes secondary hot-air anti-blocking system Download PDFInfo
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- CN208139321U CN208139321U CN201820473370.0U CN201820473370U CN208139321U CN 208139321 U CN208139321 U CN 208139321U CN 201820473370 U CN201820473370 U CN 201820473370U CN 208139321 U CN208139321 U CN 208139321U
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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 belongs to thermal power plant technical field of energy saving and environmental protection, a kind of rotary regenerative air heater utilizes secondary hot-air anti-blocking system, it solves existing station boiler rotary regenerative air heater and is easy to happen blocking during the work time, it leaks out and the problem of low-temperature corrosion, including air preheater rotor, air preheater rotor includes fume side tabacco barn, wind cabin and secondary wind cabin, air preheater rotor top is located at Secondary Air storehouse and the region of a wind cabin is provided with fan housing, fan housing is connected with hot air duct, hot air duct is connected with high temperature pressurised blower, high temperature pressurised blower is connected with electric heating system, electric heating system is connected with Separate Wind Barn by hot air duct, Separate Wind Barn is the partitioned cavity in the secondary wind cabin of air preheater rotor bottom close to fume side tabacco barn.The utility model effectively reduces air preheater air leakage and heat exchange element low-temperature corrosion problem, while substantially increasing boiler efficiency, reduce coal consumption, reaches energy-efficient purpose.
Description
Technical field
The utility model belongs to thermal power plant technical field of energy saving and environmental protection, is the novel prevention of one kind, solves air preheater
The blocking of rotor heat exchange element and air preheater air leakage, improve boiler efficiency, the device of coal consumption are reduced, mainly for large-scale thermal power
The design of factory's rotary regenerative air preheater.
Background technique
Power Plant in China faces new energy pattern, and energy conservation and environmental protection requirement is increasingly stringent, and some systems of thermal power plant
System and equipment need continuous technological progress, and air preheater belongs to the important equipment of boiler of power plant, and operation conditions is to boiler
Efficiency, coal consumption are affected.At present for air preheater there are many sealing technique, main purpose is to reduce air preheater sound contact portion
Interdigit gap, reduction are leaked out；But current nearly all unit is assembled with selective catalytic reduction reaction denitration device, crosses ammonia spraying amount
With sulfur dioxide in flue gas formed ammonium hydrogen sulfate it is inevitable, just air preheater middle-temperature section condensation, be attached to heat exchange element
Surface results in blockage, and increases rotor entrance and exit pressure difference, and aggravation is leaked out, and takes the sealing technique for reducing gap simply, can not be thorough
A series of problems that bottom solves air preheater air leakage and thus causes.
Aiming at the problem that blocking of power plant's air preheater, the sealing technique for reducing sound contact seal clearance can be taken, it can also
To take the technical solution of dredging rotor heat exchange element blocking, reduces pressure difference, leak out to reduce.
A large amount of result of study is it is found that ammonium hydrogen sulfate at 147 DEG C~200 DEG C is its adiabatic condensation temperature, and low temperature in air preheater
Section heat exchange element is exactly in this temperature range, so being easy condensation is attached to heat exchange element metal surface, accumulates and is formed
Blocking.And it is greater than 220 DEG C, ammonium hydrogen sulfate direct gasification is simultaneously taken away with air-flow, thus dredge blockage.
Summary of the invention
The utility model is easy to happen blocking, leakage to solve existing station boiler rotary regenerative air heater during the work time
The problem of wind and low-temperature corrosion, provides a kind of rotary regenerative air heater and utilizes secondary hot-air anti-blocking system.
The utility model is achieved by the following technical solution：A kind of rotary regenerative air heater utilizes the anti-blocking system of secondary hot-air
System, including air preheater rotor, air preheater rotor include fume side tabacco barn, a wind cabin and secondary wind cabin, air preheater rotor top
The region of a wind cabin is provided with fan housing positioned at secondary wind cabin, fan housing is connected with hot air duct, and hot air duct is connected with height
Warm booster fan, high temperature pressurised blower are connected with electric heating system, and electric heating system is connected with Separate Wind Barn by hot air duct,
Separate Wind Barn is the partitioned cavity in the secondary wind cabin of air preheater rotor bottom close to fume side tabacco barn.
Fan housing position is provided with fans entrance wind-warm syndrome measuring point and fans entrance pressure-measuring-point, hot air pipe in hot air duct
It is located within the scope of Separate Wind Barn and electric heating system in road and is provided with fan outlet temperature point and fan outlet pressure-measuring-point.
Electric heating system includes electric heater unit and electric heating control case, and electric heater unit is arranged on hot air duct, and
Electric heater unit is connected with electric heating control case, and electric heating control case is connected with fan outlet temperature point.
Air preheater rotor is provided with rotor top fanning strip, and fan housing is in the shape of a trumpet, and fan housing entrance face is parallel to empty pre-
The upper surface of device rotor, fan housing entrance area cover air preheater rotor center to the fan-shaped region at edge, and fan housing inlet area accounts for
1~2 lattice in the fan-shaped through-flow face of secondary wind cabin internal rotor.
The sealing of hot air duct and Separate Wind Barn link position uses soft seal.
The specified features and beneficial effect that the utility model has compared with prior art are：
The utility model primarily directed to the pre- anti-clogging formation of rotary regenerative air heater rotor, the technology in dredge blockage channel,
Devise specific hot air heating system, with reduce Gap Sealing Technology it is entirely different, mainly using tamper condensation and
The temperature characterisitic of gasification heats it using hot wind, and pre- anti-clogging forms and dredge existing tamper, reduce pressure difference,
Reduction is leaked out, and makes full use of temperature of rotor after heating to increase the temperature difference reduced with smoke temperature, namely improve outlet smoke temperature, can
Effectively avoid low-temperature corrosion, the device have simple process, high reliablity, it is adaptable many advantages, such as.Simultaneously according to revolution
Formula air preheater rotor heat exchange element tamper formation mechenism and air preheater structure, operation characteristic are formed using ammonium hydrogen sulfate
Chemical property, with the physical property of temperature phase-state change, devise hot air heating system, effectively reduce air preheater air leakage and change
Thermal element low-temperature corrosion problem reaches energy-efficient purpose while substantially increasing boiler efficiency, reduce coal consumption.
Detailed description of the invention
Fig. 1 is the system schematic of the utility model；
Fig. 2 is the structural schematic diagram of air preheater rotor.
In figure：1- air preheater rotor, 2- rotor top fanning strip, 3- fume side tabacco barn, wind cabin of 4-, 5- Secondary Air
Storehouse, 6- fan housing, 8- fans entrance wind-warm syndrome measuring point, 9- fans entrance pressure-measuring-point, 10- hot air duct, 11- high temperature pressurised blower,
12- electric heating control case, 13- electric heater unit, 14- fan outlet temperature point, 15- fan outlet pressure-measuring-point, 16- are independent
Wind cabin.
Specific embodiment
The utility model is further elaborated referring to Figures 1 and 2, a kind of rotary regenerative air heater is anti-using secondary hot-air
Stifled system, air preheater rotor 1 include that fume side tabacco barn 3, wind cabins 4, secondary wind cabin 5, fan housing 6, hot-blast pipe line 10, a blowers go out
Mouth temperature point 14, fan outlet pressure-measuring-point 15, high temperature pressurised blower 11, electric heating control case 12, electric heater unit 13, with
And the Separate Wind Barn 16 in the secondary wind cabin 5 in 1 lower part of air preheater rotor is set.Wherein, Separate Wind Barn 16 is by under air preheater rotor 1
Increased wind cabin outer shell composition in the fanning strip in portion and secondary wind cabin 5.Fan housing 6 is placed in the secondary wind cabin 5 in 1 top of air preheater rotor
Close to the region of a wind cabin 4, since the wind Jing Guo wind cabin 4 is uncolled completely, so the wind-warm syndrome in region is higher.Through hot wind
It is close that the high temperature Secondary Air that pipeline 10 is drawn is blown into the secondary wind cabin 5 in 1 lower part of air preheater rotor after being pressurized by high temperature pressurised blower 11
The Separate Wind Barn 16 that fume side tabacco barn 3 is arranged, after high temperature wind flows through air preheater rotor 1 and exchanges thermal element heating, with Secondary Air
Former Secondary Air mixing in storehouse 5.Heat exchange element is heated, and is attached to the ammonium hydrogen sulfate gasification on surface and is taken away with heating Secondary Air,
Achieve the purpose that dredge blockage.Air preheater rotor 1 rotates into fume side tabacco barn 3 after being heated continues to heat, and designs phase with original
Than reducing when heat exchange element has just enter into fume side tabacco barn 3 and the temperature difference of flue gas, eliminating the temperature base of ammonium hydrogen sulfate condensation
Plinth avoids the low-temperature corrosion that air preheater low-temperature zone may occur.As it can be seen that high temperature wind is derived from 1 top Secondary Air of air preheater rotor
Storehouse 5 close to a wind cabin 4 high-temperature area, hot wind collect using bell mouth shape fan housing 6 connect hot air duct 10 extraction mode；
The hot wind extracted out from secondary wind cabin 5 flows through high temperature pressurised blower 11 and is pressurized, and the operation of high temperature pressurised blower 11 uses frequency control, increases
Hot wind after pressure is blown into 1 bottom of air preheater rotor after the Separate Wind Barn 16 that secondary wind cabin 5 is isolated, finally secondary with top
Wind mixing.
Further, it is respectively equipped with pressure and temperature sensor on the entrance pipeline of high temperature pressurised blower 11, to
High temperature pressurised blower 11 and electric heating system are controlled, while total system operation is monitored.Wherein, fan outlet
Temperature point 14 is connect with electric heating control case 12, and wind-warm syndrome controls between 220 DEG C~320 DEG C, surpasses 320 DEG C of deactivated electric heating.
Start electric heater unit 13 automatically in boiler startup initial stage, running on the lower load and lower than 220 DEG C when.Meanwhile to secondary wind cabin 5
Pressure monitoring is carried out with 10 system of hot air duct, avoids system vibration.
In boiler operatiopn, air preheater rotor 1 is according to First air, and --- Secondary Air --- flue gas direction rotates, and fan housing 6 is placed in
Secondary wind cabin 5 extracts the high temperature Secondary Air in secondary wind cabin 5, in fan housing 6 and height close to a higher part of 4 wind-warm syndrome of wind cabin
It under the collective effect of warm booster fan 11, is pressurized through high temperature pressurised blower, is blown into the independently point storehouse of 1 bottom of air preheater rotor setting
16, subsequently into the fume side close to rotor, after heating heat exchange element, eventually enters into the secondary wind cabin 5 in top and former Secondary Air is mixed
It closes.The sealing of hot air duct 10 and 16 link position of Separate Wind Barn uses soft seal, in order to avoid swell increment is different, tearing shell or
Hot air duct 10 is caused to deform.
Finally, it is stated that the above is only the preferred embodiment of the utility model, it is noted that for this technology
For the those of ordinary skill in field, without departing from the principle of the present invention, improvement can also be made, it can also be to above-mentioned
Specific embodiment is combined, and the technical solution that these are improved and combination is formed also should be regarded as the power model of the utility model
In enclosing.
Claims (5)
1. a kind of rotary regenerative air heater utilizes secondary hot-air anti-blocking system, including air preheater rotor（1）, it is characterised in that：It is empty pre-
Device rotor（1）Including fume side tabacco barn（3）, a wind cabin（4）With secondary wind cabin（5）, air preheater rotor（1）Top is located at secondary
Wind cabin（5）Close to a wind cabin（4）Region be provided with fan housing（6）, fan housing（6）It is connected with hot air duct（10）, hot air duct
（10）It is connected with high temperature pressurised blower（11）, high temperature pressurised blower（11）It is connected with electric heating system, electric heating system passes through heat
Air piping（10）It is connected with Separate Wind Barn（16）, Separate Wind Barn（16）For air preheater rotor（1）The secondary wind cabin in bottom（5）It is interior close
Fume side tabacco barn（3）Partitioned cavity.
2. a kind of rotary regenerative air heater according to claim 1 utilizes secondary hot-air anti-blocking system, it is characterised in that：Hot wind
Pipeline（10）Interior close fan housing（6）Position is provided with fans entrance wind-warm syndrome measuring point（8）With fans entrance pressure-measuring-point（9）, hot wind
Pipeline（10）It is interior to be located at Separate Wind Barn（16）With fan outlet temperature point is provided within the scope of electric heating system（14）And blower
Outlet pressure measuring point（15）.
3. a kind of rotary regenerative air heater according to claim 2 utilizes secondary hot-air anti-blocking system, it is characterised in that：Electricity adds
Hot systems include electric heater unit（13）With electric heating control case（12）, electric heater unit（13）It is arranged in hot air duct（10）
On, and electric heater unit（13）It is connected with electric heating control case（12）, electric heating control case（12）It is connected with fan outlet temperature
Measuring point（14）.
4. a kind of rotary regenerative air heater according to claim 1 utilizes secondary hot-air anti-blocking system, it is characterised in that：It is empty pre-
Device rotor（1）It is provided with rotor top fanning strip, fan housing（6）It is in the shape of a trumpet, fan housing（6）Entrance face is parallel to air preheater and turns
Son（1）Upper surface, fan housing（6）Entrance area covers air preheater rotor（1）Fan-shaped region of the center to edge, fan housing（6）Enter
Open area accounts for secondary wind cabin（5）1~2 lattice in the fan-shaped through-flow face of internal rotor.
5. a kind of rotary regenerative air heater according to claim 1 utilizes secondary hot-air anti-blocking system, it is characterised in that：Heat
Air piping（10）With Separate Wind Barn（16）The sealing of link position uses soft seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820473370.0U CN208139321U (en) | 2018-04-04 | 2018-04-04 | A kind of rotary regenerative air heater utilizes secondary hot-air anti-blocking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820473370.0U CN208139321U (en) | 2018-04-04 | 2018-04-04 | A kind of rotary regenerative air heater utilizes secondary hot-air anti-blocking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208139321U true CN208139321U (en) | 2018-11-23 |
Family
ID=64291958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820473370.0U Expired - Fee Related CN208139321U (en) | 2018-04-04 | 2018-04-04 | A kind of rotary regenerative air heater utilizes secondary hot-air anti-blocking system |
Country Status (1)
| Country | Link |
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| CN (1) | CN208139321U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160080A (en) * | 2019-05-13 | 2019-08-23 | 南京兆能节能科技有限公司 | A kind of rotary regenerative air preheater boosting type control block apparatus and its control blocking method |
-
2018
- 2018-04-04 CN CN201820473370.0U patent/CN208139321U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160080A (en) * | 2019-05-13 | 2019-08-23 | 南京兆能节能科技有限公司 | A kind of rotary regenerative air preheater boosting type control block apparatus and its control blocking method |
| CN110160080B (en) * | 2019-05-13 | 2020-03-31 | 南京兆能节能科技有限公司 | Pressurization type blockage control device and method for rotary air preheater |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181123 Termination date: 20210404 |