CN114110644A - Heating surface rotary air preheater and sealing assembly and preparation method thereof - Google Patents
Heating surface rotary air preheater and sealing assembly and preparation method thereof Download PDFInfo
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- CN114110644A CN114110644A CN202111410335.7A CN202111410335A CN114110644A CN 114110644 A CN114110644 A CN 114110644A CN 202111410335 A CN202111410335 A CN 202111410335A CN 114110644 A CN114110644 A CN 114110644A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/02—Arrangements of regenerators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
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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 invention discloses a heating surface rotary air preheater, a sealing assembly and a preparation method thereof, belonging to the technical field of induced air, and comprising a first sealing sheet, a supporting sheet and a second sealing sheet which are sequentially arranged from front to back, and the invention is characterized in that: the outer end of the first sealing sheet exceeds the outer end of the second sealing sheet, and the first sealing sheet is made of 1.5-2.3% by mass of graphene nanosheets, 15-22% by mass of fly ash microbeads and the balance of polytetrafluoroethylene powder; the second sealing sheet is made of 2.5-3.5% by mass of graphene nanosheets, 23-28% by mass of fly ash microbeads and the balance of polytetrafluoroethylene powder. The sealing assembly can provide a certain elastic deformation space on the premise of meeting the rigidity requirement, and the structure of the sealing assembly is adaptively changed according to the deformation of the rotor so as to compensate the change of the sealing space; and the first sealing sheet and the second sealing sheet form double labyrinth seals, so that the sealing performance is improved.
Description
Technical Field
The invention belongs to the technical field of combustion equipment, and particularly relates to a heating surface rotary air preheater, a sealing assembly and a preparation method thereof.
Background
Air heater generally is referred to as air preheater for short, when the tail end indirect heating equipment as power boiler, can heat the air of mending the boiler with the heat of boiler exhaust flue gas, maintains the good combustion state of boiler, realizes synthesizing energy-conserving purpose, so has become one of the essential important auxiliary machinery equipment of thermal power station, and its performance directly influences power boiler's combustion efficiency state.
The existing air pre-heaters can be divided into a pipe box type air pre-heater and a rotary air pre-heater, wherein the rotary air pre-heater is divided into a heating surface rotary air pre-heater and a wind shield rotary air pre-heater, and the heating surface rotary air pre-heater has the advantages of compact structure, light weight, less material consumption, high density of a heat exchange surface, convenience in arrangement and the like, and is widely applied. However, the rotor of the heating surface rotary air preheater rotates slowly during operation, flue gas generated in the boiler is discharged after passing through the flue gas side of the air preheater, heat carried in the flue gas is absorbed by a heat storage plate in the air preheater, and the heat absorbed rotor moves to the air side and transfers the heat to air to be fed into the boiler, so that the heat exchange performance of the boiler is improved, and the energy consumption is reduced. In the working process of the heating surface rotary air preheater, the temperature of the flue gas inlet end is as high as 350 ℃, the temperature of the flue gas outlet end is only 120-160 ℃, so that the temperature close to the boiler side is higher than the temperature far away from the boiler side, so-called hot end and cold end are formed, the expansion and contraction are not uniform, mushroom-shaped sagging deformation is generated, the pressure of the air side is higher than that of the flue gas side, and air is easy to leak into the flue gas to generate air leakage. The ratio of the mass of air leaking from the air side into the flue gas side to the mass of flue gas entering the flue gas side is referred to in the industry as the air leakage rate.
In order to reduce the air leakage rate, chinese patent 201710942748.7 discloses an air preheater and a device for adjusting the position of a cold-end radial sealing plate of the air preheater, wherein a four-bar linkage is formed by a first transmission member, a second transmission member, a connecting rod and a preheater frame, so that when an actuator drives one of the first transmission member or the second transmission member to move, the other one of the first transmission member or the second transmission member can also move, and thus a first jacking assembly and a second jacking assembly respectively connected with the first transmission member and the second transmission member can move together under the condition that only one set of actuator is arranged, thereby realizing the adjustment process of a cold-end gap, and simplifying the structure. Although the air preheater can improve the sealing performance of the cold end to a certain extent, the structure is complex, and in order to achieve a more ideal sealing effect, an actuating mechanism is required to properly adjust the first transmission piece and the second transmission piece, so that accurate system control needs to be added.
Therefore, there is a need for developing a rotary air preheater with a simple structure and excellent sealing performance.
Disclosure of Invention
The invention aims to solve the technical problem of providing a heating surface rotary air preheater, a sealing assembly and a preparation method thereof, which can realize self sealing of the air preheater and have simple structure and durability.
In order to solve the technical problems, the technical scheme of the invention is as follows: the design is a heating surface rotary air preheater seal assembly, includes first gasket, backing sheet and the second gasket that sets gradually from front to back, its characterized in that: the outer end of the first sealing sheet exceeds the outer end of the second sealing sheet, and the first sealing sheet is made of 1.5-2.3% by mass of graphene nanosheets, 15-22% by mass of fly ash microbeads and the balance of polytetrafluoroethylene powder; the second sealing sheet is made of 2.5-3.5% by mass of graphene nanosheets, 23-28% by mass of fly ash microbeads and the balance of polytetrafluoroethylene powder.
Preferably, a first mounting piece is arranged on the front side of the first sealing piece, and a second mounting piece is arranged on the rear side of the second sealing piece.
Preferably, the mounting piece and the supporting piece are austenitic steel pieces.
Preferably, the thickness of the mounting piece and the support piece is 3 mm.
Preferably, the first sealing sheet is made of 2% by mass of graphene nanosheets, 20% by mass of fly ash microbeads and the balance of polytetrafluoroethylene powder; the second sealing sheet is made of 3% by mass of graphene nanosheets, 25% by mass of fly ash microbeads and the balance of polytetrafluoroethylene powder.
Preferably, the thickness of the first sealing sheet is 1.3-1.8 mm, and the thickness of the second sealing sheet is 0.6-1 mm.
The invention also provides a method for preparing the sealing assembly of the rotary air preheater with the heating surface, which is characterized by comprising the following steps: the method comprises the following steps:
(1) mixing: and adding the graphene nanosheets and the fly ash microbeads into the loosened polytetrafluoroethylene powder, and uniformly mixing to obtain mixed powder.
(2) Compression molding: filling the mixed powder prepared in the step (1) into a die cavity of a metal die, scraping the surface, pressurizing and maintaining pressure, and performing compression molding to obtain a preformed sealing piece; the press for compression molding can be a hydraulic press or an oil press, and the press can be used for pressing stably and uniformly to ensure that the mixed powder is stressed uniformly as long as the pressing plate of the press is flat.
(3) And (3) sintering: sintering the preformed sealing piece obtained in the step (2) to obtain a first sealing piece and a second sealing piece;
in the step (1), the mass percentage of the graphene nanosheets in the mixed powder is 1.5-2.3%, and the mass percentage of the fly ash microbeads in the mixed powder is 15-22%;
in the step (1), the mass percentage of the graphene nanosheets in the mixed powder is 2.5-3.5%, and the mass percentage of the fly ash microbeads in the mixed powder is 23-28%;
(4) fastening: arranging a first mounting piece, a first sealing piece, a supporting piece, a second sealing piece and a second mounting piece in sequence from front to back, and then fastening the first mounting piece, the first sealing piece, the supporting piece, the second sealing piece and the second mounting piece together, wherein the outer end of the first sealing piece exceeds the outer end of the second sealing piece, and the first mounting piece, the supporting piece and the second mounting piece are positioned on the inner sections of the first sealing piece and the second sealing piece;
the first sealing sheet and the second sealing sheet are convenient to assemble and fully used
Preferably, the fly ash microbeads used in the step (1) are hollow microbeads with the particle size of 10-40 microns or solid microbeads with the particle size of 10-100 microns.
Preferably, in the step (3), the temperature rising rate is 80 ℃/h when the temperature is below 200 ℃, the temperature rising rate is 60 ℃/h when the temperature is above 200 ℃ and the sintering temperature, the temperature reaches 380 ℃, the temperature is kept for 4h, and then the furnace is naturally cooled to the room temperature.
The invention also provides a rotary air preheater, which comprises a rotor, wherein a partition plate is arranged in the rotor, and the rotary air preheater is characterized in that: the upper end of the partition plate is provided with a radial sealing assembly, the lower end of the partition plate is provided with a radial lower sealing assembly, the side end of the partition plate is provided with an axial sealing assembly, and the radial sealing assembly, the radial lower sealing assembly and the axial sealing assembly are the heating surface rotary air preheater sealing assembly or the heating surface rotary air preheater sealing assembly prepared by the method;
the radial sealing component comprises a first sealing strip and a second sealing strip which are positioned at the outer ends of the support plate, and the length of the second sealing strip is 2/3 the length of the first sealing strip.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the corrosion-resistant polytetrafluoroethylene with low friction coefficient is modified by the graphene nanosheets and the fly ash microbeads to prepare the first sealing sheet and the second sealing sheet with different elasticity and rigidity, so that a certain elastic deformation space can be provided on the premise of meeting the rigidity requirement of the sealing assembly, the structure of the sealing assembly can be changed adaptively according to the deformation of the rotor, the change of the sealing space is compensated, the space constraint of a rigid component is reduced, and the overall structure of the sealing assembly is simplified; and the first sealing sheet and the second sealing sheet form double labyrinth seals, so that the sealing performance is improved.
2. The sealing assembly provided by the invention has the advantages of corrosion resistance, high temperature resistance, creep resistance, good wear resistance and the like, can be applied to sealing of the air preheater, and is stable, reliable and durable.
3. The sealing sheet has certain supporting rigidity, simplifies the structure of the sealing assembly, really realizes the soft sealing of the air preheater, and is convenient to popularize and apply in the industry.
Drawings
FIG. 1 is a schematic view of a radial seal assembly;
FIG. 2 is a schematic view of the construction of the radial lower seal assembly;
FIG. 3 is a schematic view of the mounting arrangement of the radial seal assembly;
FIG. 4 is a schematic view of the mounting arrangement of the radially lower seal assembly;
FIG. 5 is a schematic diagram of a hot side rotary air preheater.
The labels in the figure are: 1. a first mounting piece; 2. a first sealing sheet; 3. a support sheet; 4. a second sealing sheet; 5. a second mounting piece; 6. a radial seal assembly; 7. a radially lower seal assembly; 8. an axial seal assembly; 9. an upper sector plate; 10. a lower sector plate; 11. a cylindrical housing; 12. a separator.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
When the air preheater is in a use state, the hot end close to the boiler unit is defined as the upper end, and correspondingly, the cold end far away from the boiler unit is defined as the lower end; defining one end of the rotor close to the partition plate as an inner end; correspondingly, the other end of the rotor, which is far away from the partition wall, is defined as the outer end, and the direction of the sealing plate along the inner and outer ends is defined as the length direction.
The basic structure of the air preheater is as follows: install the rotor in the frame and be located the drum shell of rotor periphery, the upper end that the circle leads to the shell is fixed with sector plate, the lower extreme is fixed with down sector plate, relies on sector plate and lower sector plate like this to divide into air bin mouth and flue gas bin mouth with air heater, is fixed with the baffle along with the same rotation of pivot in the pivot of rotor, encloses into the storehouse check between two adjacent baffles and drum shell, is equipped with the heat accumulation board in the storehouse check. When the heat storage type boiler is used, smoke discharged by the boiler unit enters the air preheater from the upper opening of the smoke bin, heat in the smoke is absorbed by the radiating fins and then discharged from the lower opening of the smoke bin, and after the rotor rotates to the air bin, the heat storage plate transmits the heat absorbed in the smoke bin to the air, so that the air entering from the lower opening of the air bin is preheated and then enters the boiler unit. The invention aims to install the sealing assembly on the partition plate, improve the sealing performance between the rotor and the upper sector plate, between the rotor and the lower sector plate and between the rotor and the cylinder shell, reduce the air leakage in the air bin into the smoke in the smoke bin as far as possible and reduce the air leakage rate of the rotary air preheater.
Example one
As shown in fig. 1 and fig. 2, the sealing assembly in this embodiment is fastened by a first mounting piece, a first sealing piece, a supporting piece, a second sealing piece, and a second mounting piece, which are sequentially arranged from front to back, and the specific fixing manner may be anchoring by a rivet, or connecting and fixing by a bolt and a nut, or bonding, heat sealing, crimping, and the like, as long as they can be fixed together, and no specific requirement is imposed on the fixing manner. The thickness of the first sealing piece is 1.3mm, and the thickness of the second sealing piece is 0.6 mm. The outer end of the first sealing sheet exceeds the outer end of the second sealing sheet, and the first sealing sheet is made of 2.3% by mass of graphene nanosheets, 15% by mass of fly ash microbeads and the balance of polytetrafluoroethylene powder; the second sealing sheet is made of 3.5% by mass of graphene nanosheets, 23% by mass of fly ash microbeads and the balance of polytetrafluoroethylene powder. The mounting sheet and the supporting sheet are austenite steel sheets with excellent heat resistance, and the thickness of the mounting sheet and the supporting sheet is 3 mm.
The preparation method of the sealing assembly comprises the following steps:
(1) mixing: firstly, stirring polytetrafluoroethylene powder to loosen, then adding graphene nanosheets and fly ash microbeads, and uniformly stirring and mixing to obtain mixed powder; the fly ash micro-bead is a hollow micro-bead with the grain diameter of 10 mu m.
(2) Compression molding: putting the mixed powder prepared in the step (1) into a die for compression molding to prepare a preformed sealing sheet;
(3) and (3) sintering: and (3) sintering the preformed sealing pieces prepared in the step (2) to prepare a first sealing piece and a second sealing piece, wherein in the sintering process, the heating rate is 80 ℃/h when the temperature is lower than 200 ℃, the heating rate is 60 ℃/h when the temperature is higher than 200 ℃ to the sintering temperature, and the temperature is kept for 4h when the temperature reaches 380 ℃ and then is naturally cooled to the room temperature along with the furnace.
In the step (1), the mass percentage of the graphene nanosheets in the mixed powder is 2.3%, and the mass percentage of the fly ash microbeads in the mixed powder is 15%;
in the step (1), the second sealing sheet contains 3.5% of graphene nanosheets and 23% of fly ash microbeads by mass in the mixed powder;
(4) fastening: arrange first installation piece, first gasket, backing sheet, second gasket and second installation piece from front to back in proper order and inner aligns, then the fastening is in the same place, and the outer end of first gasket surpasss the outer end of second gasket, and first installation piece, backing sheet and second installation piece are located the inner segment of first gasket and second gasket.
As shown in fig. 5, the present embodiment further installs the above-mentioned sealing assembly on the partition of the rotor in the air preheater, resulting in a durable rotary air preheater with good sealing performance. As shown in fig. 3, the above-mentioned seal assembly, also called radial seal assembly, is mounted on the upper end of the partition plate, and the outer end of the upper seal assembly exceeds the inner wall of the upper sector plate; as shown in fig. 4, the lower end of the partition is fitted with the above-mentioned seal assembly, also called radial lower seal assembly, the outer end of which exceeds the inner wall of the lower sector plate; the side ends of the partition are fitted with the above-mentioned sealing assemblies, also called axial sealing assemblies, the outer ends of which project beyond the inner wall of the cylindrical shell. Wherein, in the radial seal subassembly first gasket and the part that the second gasket is located the backup pad outer end, the length of second gasket is 2/3 of first gasket length, in radial seal subassembly and the axial seal subassembly, as long as first gasket is good at about 5mm of second gasket.
Example two
The difference between the present embodiment and the first embodiment is:
in the step (1), the fly ash micro-beads are hollow micro-beads with the particle size of 40 mu m. In the raw materials of the first sealing sheet, the mass percentage of the graphene nanosheets in the mixed powder is 1.5%, and the mass percentage of the fly ash microbeads in the mixed powder is 22%; in the raw materials of the first sealing sheet, the mass percentage of the graphene nanosheets in the mixed powder is 2.5%, and the mass percentage of the fly ash microbeads in the mixed powder is 28%;
the thickness of the first sealing piece is 1.8mm, and the thickness of the second sealing piece is 1 mm.
EXAMPLE III
The difference between the present embodiment and the first embodiment is:
in the step (1), the fly ash micro-beads are hollow micro-beads with the particle size of 25 mu m. In the raw materials of the first sealing sheet, the mass percentage of the graphene nanosheets in the mixed powder is 2%, and the mass percentage of the fly ash microbeads in the mixed powder is 20%; in the raw materials of the first sealing sheet, the mass percentage of the graphene nanosheets in the mixed powder is 3%, and the mass percentage of the fly ash microbeads in the mixed powder is 25%;
the thickness of the first sealing piece is 1.5mm, and the thickness of the second sealing piece is 0.8 mm.
Example four
The difference between the present embodiment and the first embodiment is:
in the step (1), the fly ash micro-beads are solid micro-beads with the particle size of 10 mu m. In the raw materials of the first sealing sheet, the mass percentage of the graphene nanosheets in the mixed powder is 2.3%, and the mass percentage of the fly ash microbeads in the mixed powder is 22%; in the raw materials of the first sealing sheet, the mass percentage of the graphene nanosheets in the mixed powder is 3.5%, and the mass percentage of the fly ash microbeads in the mixed powder is 28%;
the thickness of the first sealing piece is 1.4mm, and the thickness of the second sealing piece is 0.7 mm.
EXAMPLE five
The difference between the present embodiment and the first embodiment is:
in the step (1), the fly ash micro-beads are solid micro-beads with the particle size of 100 mu m. In the raw materials of the first sealing sheet, the mass percentage of the graphene nanosheets in the mixed powder is 1.5%, and the mass percentage of the fly ash microbeads in the mixed powder is 15%; in the raw materials of the first sealing sheet, the mass percentage of the graphene nanosheets in the mixed powder is 2.5%, and the mass percentage of the fly ash microbeads in the mixed powder is 23%;
the thickness of the first sealing piece is 1.7mm, and the thickness of the second sealing piece is 0.9 mm.
EXAMPLE six
The difference between the present embodiment and the first embodiment is:
in the step (1), the fly ash micro-beads are solid micro-beads with the particle size of 50 mu m. In the raw materials of the first sealing sheet, the mass percentage of the graphene nanosheets in the mixed powder is 1.8%, and the mass percentage of the fly ash microbeads in the mixed powder is 18%; in the raw materials of the first sealing sheet, the mass percentage of the graphene nanosheets in the mixed powder is 3.2%, and the mass percentage of the fly ash microbeads in the mixed powder is 24%;
the thickness of the first sealing piece is 1.6mm, and the thickness of the second sealing piece is 0.8 mm.
The heating surface rotary air preheater manufactured by the embodiment is detected when the application time of the production field reaches 3 months, 6 months and 12 months, and the detection shows that the sizes of all sealing components are not obviously changed, the air leakage rate is still controlled within 5 percent, and the surfaces of all sealing sheets are not obviously corroded, so that the durable and good sealing of the heating surface rotary air preheater can be completely realized.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a heating surface rotary air preheater seal assembly, includes first gasket, backing sheet and the second gasket that sets gradually from front to back, its characterized in that: the outer end of the first sealing sheet exceeds the outer end of the second sealing sheet, and the first sealing sheet is made of 1.5-2.3% by mass of graphene nanosheets, 15-22% by mass of fly ash microbeads and the balance of polytetrafluoroethylene powder; the second sealing sheet is made of 2.5-3.5% by mass of graphene nanosheets, 23-28% by mass of fly ash microbeads and the balance of polytetrafluoroethylene powder.
2. A hot-face rotary air preheater seal assembly as recited in claim 1 wherein: the front side of the first sealing sheet is provided with a first mounting sheet, and the rear side of the second sealing sheet is provided with a second mounting sheet.
3. A hot-face rotary air preheater seal assembly as recited in claim 2 wherein: the mounting piece and the supporting piece are austenite steel pieces.
4. A hot-face rotary air preheater seal assembly as recited in claim 3 wherein: the thickness of installation piece and backing sheet is 3 mm.
5. A hot-face rotary air preheater seal assembly as claimed in any one of claims 1 to 4, wherein: the first sealing sheet is made of 2% by mass of graphene nanosheets, 20% by mass of fly ash microbeads and the balance of polytetrafluoroethylene powder; the second sealing sheet is made of 3% by mass of graphene nanosheets, 25% by mass of fly ash microbeads and the balance of polytetrafluoroethylene powder.
6. The hot-face rotary air preheater seal assembly of claim 5, wherein: the thickness of the first sealing piece is 1.3-1.8 mm, and the thickness of the second sealing piece is 0.6-1 mm.
7. A preparation method of a sealing assembly of a rotary air preheater with a heating surface is characterized by comprising the following steps: the method comprises the following steps:
(1) mixing: adding graphene nanosheets and fly ash microbeads into loosened polytetrafluoroethylene powder, and uniformly mixing to obtain mixed powder;
(2) compression molding: putting the mixed powder prepared in the step (1) into a die for compression molding to prepare a preformed sealing sheet;
(3) and (3) sintering: sintering the preformed sealing piece obtained in the step (2) to obtain a first sealing piece and a second sealing piece;
in the step (1), the mass percentage of the graphene nanosheets in the mixed powder is 1.5-2.3%, and the mass percentage of the fly ash microbeads in the mixed powder is 15-22%;
in the step (1), the mass percentage of the graphene nanosheets in the mixed powder is 2.5-3.5%, and the mass percentage of the fly ash microbeads in the mixed powder is 23-28%;
(4) fastening: arrange first installation piece, first gasket, backing sheet, second gasket and second installation piece from preceding to back in proper order, then the fastening is in the same place, and the outer end of first gasket surpasss the outer end of second gasket, and first installation piece, backing sheet and second installation piece are located the inner segment of first gasket and second gasket.
8. A method of making a hot side rotary air preheater seal assembly as recited in claim 7 wherein: the fly ash microbeads used in the step (1) are hollow microbeads with the particle size of 10-40 microns or solid microbeads with the particle size of 10-100 microns.
9. A method of making a hot side rotary air preheater seal assembly as recited in claim 7 or 8, wherein: in the step (3), the heating rate is 80 ℃/h when the temperature is below 200 ℃, the heating rate is 60 ℃/h when the temperature is from above 200 ℃ to the sintering temperature, and the temperature is maintained for 4h when the temperature reaches 380 ℃, and then the furnace is naturally cooled to the room temperature.
10. The utility model provides a rotary air preheater, includes the rotor, is equipped with baffle in the rotor which characterized in that: the upper end of the partition plate is provided with a radial sealing assembly, the lower end of the partition plate is provided with a radial lower sealing assembly, the side end of the partition plate is provided with an axial sealing assembly, and the radial sealing assembly, the radial lower sealing assembly and the axial sealing assembly are the heating surface rotary air preheater sealing assembly of any one of claims 1 to 6 or the heating surface rotary air preheater sealing assembly prepared by the method of any one of claims 7 to 9;
the radial sealing component comprises a first sealing strip and a second sealing strip which are positioned at the outer ends of the support plate, and the length of the second sealing strip is 2/3 the length of the first sealing strip.
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| CN202111410335.7A CN114110644B (en) | 2021-11-25 | 2021-11-25 | Heating surface rotary air preheater and sealing assembly and preparation method thereof |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0495608A2 (en) * | 1991-01-14 | 1992-07-22 | Ngk Insulators, Ltd. | Sealing structure for a rotating gas heater |
| US6358348B1 (en) * | 1998-01-20 | 2002-03-19 | Single Buoy Moorings Inc. | Method of welding generally rod-shaped structures of a fluorine-containing plastic material in a butt weld |
| CN1809696A (en) * | 2003-06-17 | 2006-07-26 | 松下电器产业株式会社 | Air-feeding device |
| CN102435096A (en) * | 2010-12-08 | 2012-05-02 | 苏州嘉言能源设备有限公司 | Non-metal heat exchanger |
| CN202733937U (en) * | 2012-08-24 | 2013-02-13 | 赵淑芬 | Wind film sealing system for rotary air preheater |
| WO2013127594A1 (en) * | 2012-03-01 | 2013-09-06 | Sgl Carbon Se | Rotation heat exchanger having heat exchanger plates or heat exchanger tubes made of carbon and graphite materials |
| CN203298648U (en) * | 2013-05-15 | 2013-11-20 | 中石化洛阳工程有限公司 | Polytetrafluoroethylene tube type air preheater |
| US20140020868A1 (en) * | 2011-07-22 | 2014-01-23 | Univerzita Karllova V Praza Lekarska Fakulta V Plzni | Heat exchanger with laminarizer |
| CN206018695U (en) * | 2016-08-31 | 2017-03-15 | 长春市华源峙澔电力科技有限公司 | Rotary regenerative air preheater elastic sealing device |
| WO2020114419A1 (en) * | 2018-12-04 | 2020-06-11 | 大金氟化工（中国）有限公司 | Preparation method for polytetrafluoroethylene composition, polytetrafluoroethylene composition, forming product, conductive pipe, heat conduction film, and substrate ccl |
| CN112300521A (en) * | 2020-11-09 | 2021-02-02 | 河北中科同创科技发展有限公司 | High-thermal-conductivity polytetrafluoroethylene composite material and preparation method and application thereof |
| CN213512075U (en) * | 2020-09-27 | 2021-06-22 | 国家能源集团国源电力有限公司 | Oil seal structure of air preheater guide bearing |
-
2021
- 2021-11-25 CN CN202111410335.7A patent/CN114110644B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0495608A2 (en) * | 1991-01-14 | 1992-07-22 | Ngk Insulators, Ltd. | Sealing structure for a rotating gas heater |
| US6358348B1 (en) * | 1998-01-20 | 2002-03-19 | Single Buoy Moorings Inc. | Method of welding generally rod-shaped structures of a fluorine-containing plastic material in a butt weld |
| CN1809696A (en) * | 2003-06-17 | 2006-07-26 | 松下电器产业株式会社 | Air-feeding device |
| CN102435096A (en) * | 2010-12-08 | 2012-05-02 | 苏州嘉言能源设备有限公司 | Non-metal heat exchanger |
| US20140020868A1 (en) * | 2011-07-22 | 2014-01-23 | Univerzita Karllova V Praza Lekarska Fakulta V Plzni | Heat exchanger with laminarizer |
| WO2013127594A1 (en) * | 2012-03-01 | 2013-09-06 | Sgl Carbon Se | Rotation heat exchanger having heat exchanger plates or heat exchanger tubes made of carbon and graphite materials |
| CN202733937U (en) * | 2012-08-24 | 2013-02-13 | 赵淑芬 | Wind film sealing system for rotary air preheater |
| CN203298648U (en) * | 2013-05-15 | 2013-11-20 | 中石化洛阳工程有限公司 | Polytetrafluoroethylene tube type air preheater |
| CN206018695U (en) * | 2016-08-31 | 2017-03-15 | 长春市华源峙澔电力科技有限公司 | Rotary regenerative air preheater elastic sealing device |
| WO2020114419A1 (en) * | 2018-12-04 | 2020-06-11 | 大金氟化工（中国）有限公司 | Preparation method for polytetrafluoroethylene composition, polytetrafluoroethylene composition, forming product, conductive pipe, heat conduction film, and substrate ccl |
| CN213512075U (en) * | 2020-09-27 | 2021-06-22 | 国家能源集团国源电力有限公司 | Oil seal structure of air preheater guide bearing |
| CN112300521A (en) * | 2020-11-09 | 2021-02-02 | 河北中科同创科技发展有限公司 | High-thermal-conductivity polytetrafluoroethylene composite material and preparation method and application thereof |
Non-Patent Citations (4)
| Title |
|---|
| 刘瑞雪等主编: "《高分子材料》", 30 September 2018, 河南大学出版社 * |
| 吕方等: "玻璃微珠填充改性聚合物研究进展", 《玻璃钢/复合材料》 * |
| 胡荫平主编: "《电站锅炉手册》", 30 April 2005, 中国电力出版社 * |
| 谢苏江等: ""石墨烯/聚四氟乙烯复合密封材料的制备及性能研究"", 《润滑与密封》 * |
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| CN114110644B (en) | 2022-08-02 |
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