CN203823799U - Hot end sealing structure for counterweight rotary preheater - Google Patents
Hot end sealing structure for counterweight rotary preheater Download PDFInfo
- Publication number
- CN203823799U CN203823799U CN201420260539.6U CN201420260539U CN203823799U CN 203823799 U CN203823799 U CN 203823799U CN 201420260539 U CN201420260539 U CN 201420260539U CN 203823799 U CN203823799 U CN 203823799U
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- China
- Prior art keywords
- diaphragm seal
- preheater
- gravity block
- sealing piece
- bolt
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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 relates to a sealing structure for a rotary preheater and particularly relates to a hot end sealing structure for a counterweight rotary preheater. The hot end sealing structure comprises a sealing piece and a sector plate, wherein the sealing piece is fixed on a gravitational block through a bolt and a bolt gasket; a hook is arranged at the top end of the gravitational block; the gravitational block is suspended on the raised rod of a supporting plate through the hook and can rotate along the raised rod and further drive the sealing piece on the gravitational block to rotate; the supporting plate is fixed on a rotor radial clapboard through a bolt, a gasket and a screw nut. According to the utility model, the fixed sector plate exerts a force on the sealing piece to enable the sealing piece to rotate, the position of the sealing piece is lowered, and the sealing piece naturally goes down by depending on the gravitational block, so that the sealing piece is enabled to be lifted and closely matched with the lower surface of the sector plate so as to reach zero clearance, therefore, the air leaking area of the preheater is directly reduced, the air leaking rate of the preheater is reduced, and the operational economy of the preheater is improved.
Description
Technical field
The utility model relates to a kind of rotary preheater sealing device, particularly a kind of Weight type rotary preheater hot junction hermetically-sealed construction.
Background technology
Rotary preheater in running due to temperature raise, there is temperature difference in hot junction and cold junction, metal can produce thermal expansion, make air preheater produce mushroom deformation, after distortion, conventional diaphragm seal and hot junction fanning strip can produce the triangle district of leaking out, what existing double containment and three sealings also adopted is conventional sealing, and what have also adds one soft seal again every conventional sealing together, but these are not still eliminated hot end of rotor and cold-end temperature difference and cause the distortion formation triangle district of leaking out.Rotary preheater is divided into and directly leaks out and carry the two parts that leak out, and directly leaks out and accounts for 70～80%, and 80% direct inleakage is to leak in flue gas by radial and axial, and wherein about 40～50% inleakage is directly to leak from Delta Region, hot junction.
China Patent No. is the rotary regenerative air preheater sealing device that a kind of friction pair of " ZL 201220401801.5 " is optimized, its thermoelasticity by alloy diaphragm seal produces deformation and rubbing device (fanning strip, arc or T-steel) fits tightly, leak out to reduce, be only the micro-thermoelastic deformation that relies on alloy diaphragm seal, can not produce good sealing effectiveness.And after working long hours, because the aging meeting of alloy diaphragm seal makes elastic deformation variation, it is poorer that sealing effectiveness will become.
Summary of the invention
Main purpose of the present utility model is to overcome deficiency of the prior art, provide a kind of simple in structure, cost is low, good sealing effect, the Weight type rotary preheater hot junction hermetically-sealed construction that reliability is high
.
Above-mentioned technical problem of the present utility model is implemented by the following technical programs: a kind of Weight type rotary preheater hot junction hermetically-sealed construction, comprise diaphragm seal and fanning strip, described diaphragm seal is fixed on by bolt and spacer for bolt on the upper surface of gravity block, the top of gravity block lower surface is provided with a crotch, by crotch gravity block stirrup on the nose bar of gripper shoe, gravity block can rotate and then drive the diaphragm seal on gravity block to rotate along nose bar, and gripper shoe is fixed on rotor radial dividing plate by bolt, packing ring and nut.In the time of rotary preheater cold conditions, rotor is without distortion, when rotary preheater rotates, apply power by fixing fanning strip and carry out rotary seal sheet, diaphragm seal position reduces, and then relies on naturally sinking of weight block, makes to carry with fanning strip lower surface and fit tightly and reach zero clearance on diaphragm seal; Form the seal form of Weight type, utilized lever principle that diaphragm seal can be fitted tightly with fanning strip as much as possible.In the time that diaphragm seal leaves fanning strip, due to the effect of gravity block, diaphragm seal returns to former height and position again; In the time of hot rotor deformation, when hot, Weight type seals in free state.Negative value and thermal deformation are cancelled out each other, and seal clearance is zero.Diaphragm seal can shutoff rotary preheater hot junction the triangle region of leaking out radially, thereby effectively reduce the inleakage of preheater.
As preferably, the top of described nose bar is provided with a protruding ball, and described crotch hooks together in protruding ball, and gravity block is hooked together in protruding ball and can be rotated and then drive the diaphragm seal on gravity block to rotate along protruding ball by crotch.Be gravity block because self gravitation effect is when sinking, diaphragm seal is upwards carried with fanning strip and being fitted tightly, and in the time that diaphragm seal leaves fanning strip, due to the effect of gravity block, diaphragm seal returns to the position that originally exceeds fanning strip again.
As preferably, when described diaphragm seal separates with fanning strip, the top upper surface of diaphragm seal is higher than described fanning strip lower surface, and exceeding is highly 10～60mm.It exceeds highly and is decided by heat distortion amount, is generally 10～60mm, and preheater diameter is larger, and the temperature difference is larger, and deflection is larger.
As preferably, the slewing area of described diaphragm seal is 25 °～40 °.
The beneficial effects of the utility model are: under the prerequisite that rotary preheater heat-transfer capability does not decline and flue gas resistance pressure reduction is more or less the same, the utility model has reduced about 22～32% than conventional Sealing Technology inleakage, the economy of preheater operation is improved.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the utility model seal process figure.
Number in the figure is: 1, diaphragm seal, 2, gravity block, 3, bolt, 4, spacer for bolt, 5, gripper shoe, 6, crotch, 7, packing ring, 8, nut, 9, rotor radial dividing plate, 10, nose bar, 11, fanning strip, 12, protruding ball.
Detailed description of the invention
Below by embodiment, by reference to the accompanying drawings, the technical solution of the utility model is described in further detail:
Embodiment 1: as shown in Figure 1, a kind of Weight type rotary preheater hot junction hermetically-sealed construction, comprise diaphragm seal 1 and fanning strip 11, when described diaphragm seal separates with fanning strip, the top upper surface of diaphragm seal is higher than described fanning strip lower surface, exceed is highly 10～60mm, diaphragm seal is fixed on gravity block 2 by bolt 3 and spacer for bolt 4, the top of gravity block is provided with a crotch 6, by crotch gravity block stirrup on the nose bar 10 of gripper shoe 5, gravity block can rotate and then drive the diaphragm seal on gravity block to rotate within the scope of 25 °～40 ° along nose bar, gripper shoe is passed through bolt, packing ring 7 and nut 8 are fixed on rotor radial dividing plate 9.
The top of above-mentioned nose bar is provided with a protruding ball 12, and described crotch hooks together in protruding ball and can rotate along protruding ball, and gravity block rotates along protruding ball, and then drives diaphragm seal to rotate.
When concrete manufacture and use, carry out the weight of design weight piece by the flow that calculates fume side and air side pressure reduction and flue gas and air, then calculate preheater hot distortion, determine Weight type sealing adjustable range according to heat distortion amount.Deflection is generally between 10～60mm, and preheater diameter is larger, and the temperature difference is larger, and deflection is larger.Gravity block can drive diaphragm seal 1 to rotate within the scope of 25 °～40 °, when diaphragm seal is installed, determines and regulates setting height(from bottom) according to heat distortion amount, and when cold conditions, seal clearance is reserved as negative value, and negative value size is suitable with the hot downward deflection of rotor.As shown in Figure 2, in the time of rotary preheater cold conditions, rotor is without distortion, when rotary preheater rotates, apply power by fixing fanning strip and carry out rotary seal sheet, diaphragm seal position reduces, and then relies on naturally sinking of weight block, makes to carry with fanning strip lower surface and fit tightly and reach zero clearance on diaphragm seal.In the time that diaphragm seal leaves fanning strip, due to the effect of gravity block, diaphragm seal returns to former height and position again; In the time of hot rotor deformation, when hot, Weight type seals in free state.Negative value and thermal deformation are cancelled out each other, and seal clearance is zero.Diaphragm seal can shutoff rotary preheater hot junction the triangle region of leaking out radially, thereby effectively reduce the inleakage of preheater.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendments or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Claims (5)
1. a Weight type rotary preheater hot junction hermetically-sealed construction, comprise diaphragm seal (1) and fanning strip (11), it is characterized in that, described diaphragm seal is fixed on the upper surface of gravity block (2) by bolt (3) and spacer for bolt (4), the top of gravity block lower surface is provided with a crotch (6), by crotch gravity block stirrup on the nose bar (10) of gripper shoe (5), gravity block can rotate and then drive the diaphragm seal on gravity block to rotate along nose bar, and gripper shoe is fixed on rotor radial dividing plate (9) by bolt, packing ring (7) and nut (8).
2. Weight type rotary preheater according to claim 1 hot junction hermetically-sealed construction, it is characterized in that, the top of described nose bar is provided with a protruding ball (12), described crotch hooks together in protruding ball, and gravity block is hooked together in protruding ball and can be rotated and then drive the diaphragm seal on gravity block to rotate along protruding ball by crotch.
3. Weight type rotary preheater according to claim 1 and 2 hot junction hermetically-sealed construction, is characterized in that, when described diaphragm seal separates with fanning strip, the top upper surface of diaphragm seal is higher than described fanning strip lower surface, and exceeding is highly 10～60mm.
4. Weight type rotary preheater according to claim 1 and 2 hot junction hermetically-sealed construction, is characterized in that, the slewing area of described diaphragm seal is 25 °～40 °.
5. Weight type rotary preheater according to claim 3 hot junction hermetically-sealed construction, is characterized in that, the slewing area of described diaphragm seal is 25 °～40 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420260539.6U CN203823799U (en) | 2014-05-21 | 2014-05-21 | Hot end sealing structure for counterweight rotary preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420260539.6U CN203823799U (en) | 2014-05-21 | 2014-05-21 | Hot end sealing structure for counterweight rotary preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203823799U true CN203823799U (en) | 2014-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420260539.6U Active CN203823799U (en) | 2014-05-21 | 2014-05-21 | Hot end sealing structure for counterweight rotary preheater |
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| Country | Link |
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| CN (1) | CN203823799U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534915A (en) * | 2014-12-25 | 2015-04-22 | 杨学让 | Seal equipment, rotary air pre-heater with same and seal method |
| CN107388277A (en) * | 2017-05-31 | 2017-11-24 | 神华集团有限责任公司 | Air preheater sealing structure, rotary regenerative air heater and boiler |
-
2014
- 2014-05-21 CN CN201420260539.6U patent/CN203823799U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534915A (en) * | 2014-12-25 | 2015-04-22 | 杨学让 | Seal equipment, rotary air pre-heater with same and seal method |
| CN107388277A (en) * | 2017-05-31 | 2017-11-24 | 神华集团有限责任公司 | Air preheater sealing structure, rotary regenerative air heater and boiler |
| CN107388277B (en) * | 2017-05-31 | 2020-05-05 | 神华集团有限责任公司 | Air preheater sealing structure, rotary air preheater and boiler |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |