CN201507942U - Guiding-type leakage circulating control system - Google Patents
Guiding-type leakage circulating control system Download PDFInfo
- Publication number
- CN201507942U CN201507942U CN2009202498336U CN200920249833U CN201507942U CN 201507942 U CN201507942 U CN 201507942U CN 2009202498336 U CN2009202498336 U CN 2009202498336U CN 200920249833 U CN200920249833 U CN 200920249833U CN 201507942 U CN201507942 U CN 201507942U
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- board
- sector plate
- central sector
- vacuum chamber
- arm
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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 guiding-type leakage circulating control system which is provided with a sealing mechanism. The sealing mechanism comprises a cold end central fan-like board, a hot end central fan-like board, an axial curved board, a static sealing device, a rotor sealing sheet and a support part, wherein the cold end central fan-like board and the hot end central fan-like board are arranged axially and integrally combined with two ends of the axial curved board which is arranged axially, and the central fan-like board and the axial curved board are provided with negative pressure chambers and guiding areas formed by guiding holes or guiding seams. The outer lateral surface of the central fan-like board is provided with a branch guiding pipe and a main guiding pipe both communicated with a draught fan. The draught fan is provided with a discharge branch pipes A, B which are respectively communicated with an original secondary heat air duct of a boiler and an outlet of a forced draught fan. The central fan-like board is provided with a pressure detector, the main guiding pipe is provided with a thermal couple, a regulating valve, a pressure and flow transmitting joint, and the branch pipes A, B are respectively provided with regulating valves A, B and a controller. The guiding-type leakage circulating control system is suitable for sealing and leakage air recovery of air preheaters, can save energy resources, and increase effects of the air preheaters.
Description
Technical field
The utility model belongs to a kind of auxiliary equipment of boiler, is the new equipment that sealing that prevents smoke spillage on a kind of air preheater that is used for big-and-middle-sized boiler of power plant and flue gas reclaim.
Background technology
Air preheater is that air preheater is the afterbody heat transmission equipment that extensively adopts on the big-and-middle-sized boiler of power plant, and its main effect is: 1. reclaim heat, regulate exhaust gas temperature, improve boiler efficiency, thereby reach fuel-saving purpose; 2. improve the boiler air themperature, the imperfect combustion of fuel is reduced, and has promptly improved efficiency of combustion; 3. chamber flue gas temperature rises, and has strengthened radiation heat transfer.The air preheater that uses mainly contains swinging and tubular type at present.Rotary regenerative air heater is compared with tubular type, has compact conformation, the steel consumption is few, advantages such as easy arrangement, but the air leak rate of air curtain height insoluble problem that is rotary regenerative air preheater, so in the rotary regenerative air heater technology, beyond except adopting traditional mechanical seal means, the recovery type mentality of designing that has also occurred " block up afterwards earlier and take out " in the market, both carrying out " shutoff " in utilization mechanical seal leaks out and reduces to leak out after the pressure, " take out " by being arranged on the air that air-vent on the fanning strip will not block and still leak again, thereby the actual air leak rate of air curtain of air preheater is reduced greatly.But present above-mentioned technology also requires further improvement, and leaking out of reclaiming directly is transmitted back to the original hot secondary air box of boiler and the original pressure fan outlet of boiler by blower fan will produces good effect the wind regime of dredging is utilized more fully.
The utility model content
The purpose of this utility model is in order to solve above-mentioned technology technical problem, proposes a kind of formula of dredging cyclic control system that leaks out, and this system architecture is simple, only need on original equipment, improve, gas leakage reclaim and energy-saving effect very good.
The purpose of this utility model solves by the following technical programs: a kind of formula of dredging cyclic control system that leaks out, be provided with sealing mechanism, sealing mechanism comprises cold junction central sector plate, hot junction central sector plate, axial arc, static seal device, rotor seal sheet and support member, described cold junction fanning strip and hot junction fanning strip are two, radially be provided with respectively, and it is combined integrated with the two ends of the axial arc of axial setting, cold, hot junction central sector plate and axial arc sealing device all can be regulated, it is characterized in that: described central sector plate and axial arc are provided with vacuum chamber, be provided with vacuum chamber the central sector plate sealing surface and axially the sealing surface of arc plate be provided with intensive ease-hole or dredge seam, the position that is provided with ease-hole or dredges seam constitutes dredges the district, this ease-hole or dredge seam and communicate with vacuum chamber accordingly; Be provided with leaking out of communicating with the negative pressure plenum chamber at the lateral surface of described central sector plate and dredge arm, this is dredged arm and dredges house steward and be communicated with; Be provided with a blower fan at the other end of house steward, the outlet air end of this blower fan is provided with air-out arm A and air-out arm B, and arm A is communicated with the original hot secondary air duct of boiler, and arm B is communicated with the original pressure fan outlet of boiler; On described central sector plate, be provided with vacuum chamber's pressure detector, be provided with thermocouple, control valve, pressure inverting interface and flow on the house steward and become and send interface dredging, on described arm A, B, be respectively equipped with control valve A, B, and being provided with controller, described pressure detector, thermocouple, control valve, pressure inverting interface and flow change send Interface and Controler to carry out signal and control connection.
The novel further additional project of perfect enforcement of this use is:
Described with dredge vacuum chamber that house steward is communicated with and be built up in the cool and heat ends central sector plate and axially in the arc.
Described with dredge vacuum chamber that house steward is communicated with and only be built up in the central sector plate of hot junction and axially in the arc.
The described central sector plate sealing surface that is provided with vacuum chamber and axially the intensive ease-hole that is provided with in dredging the zone of arc sealing surface or the arrangement mode of dredging seam and are that single row or multiple rows make up for radially or axially; Described many row's combining forms are the fixing or outwards radially equal proportion increase of ranks number and spacing size.
Operation principle: when air preheater equipment normally moves, can only leak to vacuum chamber by the district of dredging of sealing surface through the hot-air that has malleation on a small quantity that leaks behind the sealing device with negative pressure, promptly by in intensive ease-hole, the seam negative suction chamber, leakage air in the vacuum chamber is connected with the circulation line that house steward constitutes by dredging arm, under by the suction function that is attached thereto the blower fan generation that connects, form the negative pressure that is complementary with flue negative pressure, it is combustion-supporting to be directed into the interior participation of hot secondary air duct burner hearth; Also can directly be directed to the pressure fan exit and enter circulation, play the effect that improves initial wind-warm syndrome, effectively reduce the cold end corrosion of air preheater, improve the thermal efficiency of boiler.
Sealing is dredged automatic control system by the detection to import and export flue gas oxygen content, pressure, handles through control logic, and the automatic regulating valve door is dredged internal circulating load thereby automatically adjust leaking out in the equipment, makes it reach reasonable flow.Thereby this system can accomplish no matter how boiler load changes, and its equipment air leak rate of air curtain and air circulation are controlled in the setting range all the time.
Advantage of the present utility model:
This apparatus system is to transform on the basis of original mechanical seal, and equipment is simple relatively, the air leak rate of air curtain of air preheater can be controlled at lower level (below 3.5%), not only can dredge hot secondary air duct with leaking out and continue to do manual work; The pressure fan exit is delivered in circulation in the time of heat leak wind can also being needed at the scene, improve the initial wind-warm syndrome of air-supply, play the effect of steam air heater, improve the phenomenon of air preheater cold end corrosion, can improve simultaneously the heat exchanger effectiveness of air preheater again, make the secondary air temperature of air preheater outlet improve, finally reach the effect that improves boiler thermal output.Not only can guarantee the reduction of air-heater leakage rate, thereby reduction heat loss due to exhaust gas, improve boiler efficiency, strengthen boiler safety and economical operation, and simultaneously fume side reduces mixing that this strand leak out, the corresponding decline of exhaust gas volumn, and flue negative pressure is still replenished, thereby the also corresponding reduction with power consumption of the load of air-introduced machine, improved overall economic efficiency.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described: embodiment: referring to accompanying drawing, the formula of the dredging cyclic control system that leaks out, be provided with sealing mechanism, sealing mechanism comprises cold junction central sector plate 1.1, hot junction central sector plate 1.2, axial arc 1.3, static seal device, rotor seal sheet and support member, described cold junction fanning strip and hot junction fanning strip are two, radially be provided with respectively, and it is combined integrated with the two ends of the axial arc of axial setting, cold, hot junction central sector plate and axial arc sealing device all can be regulated, it is characterized in that: described central sector plate and axial arc are provided with vacuum chamber, be provided with vacuum chamber the central sector plate sealing surface and axially the sealing surface of arc plate be provided with intensive ease-hole or dredge seam 2.1,2.11,2.12, the position that is provided with ease-hole or dredges seam constitutes dredges the district, this ease-hole or dredge seam and communicate with vacuum chamber accordingly; Be provided with leaking out of communicating with the negative pressure plenum chamber at the lateral surface of described central sector plate and dredge arm 2.2,2.22, this is dredged arm and dredges house steward 2.3,2.33 and be communicated with; Be provided with a blower fan 5 at the other end of house steward, the outlet air end of this blower fan is provided with air-out arm A and air-out arm B, and arm A is communicated with the original hot secondary air duct of boiler, and arm B is communicated with the original pressure fan outlet of boiler; On described central sector plate, be provided with vacuum chamber's pressure detector 4.1,4.11, be provided with thermocouple 4.5, control valve 5.3, pressure inverting interface 4.2 and flow on the house steward and become and send interface 4.3 dredging, on described arm A, B, be respectively equipped with control valve A 5.1, control valve B 5.2, and being provided with controller, described pressure detector, thermocouple, control valve, pressure inverting interface and flow change send Interface and Controler to carry out signal and control connection.Described in the present embodiment with dredge vacuum chamber that house steward is communicated with and be built up in the cool and heat ends central sector plate and axially in the arc.The described central sector plate sealing surface that is provided with vacuum chamber and axially the arrangement mode of the intensive ease-hole 2.1,2.11,2.12 that in dredging the zone, is provided with of arc sealing surface be respectively radial and axial, and be to arrange to make up more; Described many row's combining forms are outwards radially equal proportion increase.
Present embodiment is fine through trial effect, is subjected to the favorable comment of user and relevant industrial department deeply.
Claims (4)
1. the formula of dredging cyclic control system that leaks out, be provided with sealing mechanism, sealing mechanism comprises cold junction central sector plate (1.1), hot junction central sector plate (1.2), axial arc (1.3), static seal device, rotor seal sheet and support member, described cold junction fanning strip and hot junction fanning strip are two, radially be provided with respectively, and it is combined integrated with the two ends of the axial arc of axial setting, cold, hot junction central sector plate and axial arc sealing device all can be regulated, it is characterized in that: described central sector plate and axial arc are provided with vacuum chamber, be provided with vacuum chamber the central sector plate sealing surface and axially the sealing surface of arc plate be provided with intensive ease-hole or dredge seam (2.1,2.11,2.12), the position that is provided with ease-hole or dredges seam constitutes dredges the district, this ease-hole or dredge seam and communicate with vacuum chamber accordingly; Be provided with leaking out of communicating with the negative pressure plenum chamber at the lateral surface of described central sector plate and dredge arm (2.2,2.22), this is dredged arm and dredges house steward (2.3,2.33) and be communicated with; Be provided with a blower fan (5) at the other end of house steward, the outlet air end of this blower fan is provided with air-out arm A and air-out arm B, and arm A is communicated with the original hot secondary air duct of boiler, and arm B is communicated with the original pressure fan outlet of boiler; On described central sector plate, be provided with vacuum chamber's pressure detector (4.1,4.11), be provided with thermocouple (4.5), control valve (5.3), pressure inverting interface (4.2) and flow on the house steward and become and send interface (4.3) dredging, on described arm A, B, be respectively equipped with control valve A, B (5.1,5.2), and being provided with controller, described pressure detector, thermocouple, control valve, pressure inverting interface and flow change send Interface and Controler to carry out signal and control connection.
2. the formula of the dredging according to claim 1 cyclic control system that leaks out is characterized in that: described with dredge vacuum chamber that house steward is communicated with and be built up in the cool and heat ends central sector plate and axially in the arc.
3. the formula of the dredging according to claim 1 cyclic control system that leaks out is characterized in that: described with dredge vacuum chamber that house steward is communicated with and only be built up in the central sector plate of hot junction and axially in the arc.
4. the formula of the dredging according to claim 1 cyclic control system that leaks out, it is characterized in that: the described central sector plate sealing surface that is provided with vacuum chamber and axially the intensive ease-hole that is provided with in dredging the zone of arc sealing surface or the arrangement mode of dredging seam (2.1,2.11,2.12) and are that single row or multiple rows make up for radially or axially; Described many row's combining forms are the fixing or outwards radially equal proportion increase of ranks number and spacing size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202498336U CN201507942U (en) | 2009-10-15 | 2009-10-15 | Guiding-type leakage circulating control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202498336U CN201507942U (en) | 2009-10-15 | 2009-10-15 | Guiding-type leakage circulating control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201507942U true CN201507942U (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202498336U Expired - Fee Related CN201507942U (en) | 2009-10-15 | 2009-10-15 | Guiding-type leakage circulating control system |
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| CN (1) | CN201507942U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095206A (en) * | 2011-02-14 | 2011-06-15 | 燕守志 | Sealed recovery system for rotary air preheater |
| CN103047674A (en) * | 2012-12-28 | 2013-04-17 | 北京哈宜节能环保科技开发有限公司 | Air leakage circulation control device |
| CN104456574A (en) * | 2013-09-17 | 2015-03-25 | 荒木国臣 | Combustion apparatus |
-
2009
- 2009-10-15 CN CN2009202498336U patent/CN201507942U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095206A (en) * | 2011-02-14 | 2011-06-15 | 燕守志 | Sealed recovery system for rotary air preheater |
| CN102095206B (en) * | 2011-02-14 | 2012-02-29 | 燕守志 | Sealed recovery system for rotary air preheater |
| CN103047674A (en) * | 2012-12-28 | 2013-04-17 | 北京哈宜节能环保科技开发有限公司 | Air leakage circulation control device |
| CN104456574A (en) * | 2013-09-17 | 2015-03-25 | 荒木国臣 | Combustion apparatus |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100616 Termination date: 20181015 |