CN101929096A - Built-in steam knife component of papermaking drying cylinder - Google Patents
Built-in steam knife component of papermaking drying cylinder Download PDFInfo
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- CN101929096A CN101929096A CN 201010266421 CN201010266421A CN101929096A CN 101929096 A CN101929096 A CN 101929096A CN 201010266421 CN201010266421 CN 201010266421 CN 201010266421 A CN201010266421 A CN 201010266421A CN 101929096 A CN101929096 A CN 101929096A
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Abstract
The invention belongs to the technical field of papermaking drying cylinders and particularly relates to a built-in steam knife component of a papermaking drying cylinder. The component comprises a central steam tube arranged in the drying cylinder, wherein a plurality of steam collecting tubes are arranged on the inner wall of the drying cylinder uniformly; the steam collecting tubes are communicated with the central steam tube through a plurality of steam branch pipes; and each steam collecting tubes has a sealed structure enclosed by a groove-like tube body, plugs on two ends of the tube body and a spray tube plate on the upper end of the tube body, and a plurality of tapered spray holes are formed on the spray tube uniformly. The built-in steam knife component of the papermaking drying cylinder adopts a tapered steam jet structure to make high-temperature steam, which is conveyed to the steam collecting tubes from the central steam tube, jetted uniformly at a high flow speed, and thus, a high-speed and high-temperature steam flow, namely the steam knife, which has required strength, is formed between the steam jet structure and the inner wall of the drying cylinder; and the steam knife washes a water ring on the inner wall of the drying cylinder to render the water ring in a disturbed state, so the heat resistance of the water ring on the inner wall of the drying cylinder is reduced, the heat transfer efficiency is improved greatly, and energy is saved.
Description
Technical field
The invention belongs to the paper-making drying cylinder technical field, be specifically related to a kind of built-in steam knife component of papermaking drying cylinder.
Background technology
In the industry papermaking, energy consumption is more greatly a problem that needs to be resolved hurrily.Concerning long mesh paper making machine, the energy consumption of drying section accounts for the over half of whole paper machine, and the appropriate design of drying section improves output for saving construction investment, guarantees the end product quality and the extremely close relation that reduced production costs.
Drying cylinder is the drying section critical component, also is the highly energy-consuming parts, so one of focus that drying cylinder is energy-conservation research to be paid close attention to.When speed during greater than 400m/min, condensed water can form water ring all attached on the drying cylinder inwall, because the thermal conductivity ratio iron and steel of condensed water is little 87 times, and the water ring that forms on the drying cylinder inwall, heat transfer resistance is bigger, directly influences heat transfer efficiency.
Chinese patent " a kind of steam knife type aqueous vapor injection apparatus in paper-making drying cylinder " (publication number: CN101349026, open day: 2009-01-21), the purpose of this invention is to provide a kind of condensate water ring thickness attenuate that high speed drying cylinder inwall is formed, and make the thin layer water ring of drying cylinder inwall existence be in state of disturbance, thereby improve the steam knife type aqueous vapor injection apparatus in paper-making drying cylinder of paper quality.But its nozzle sets that forms air knife is formed a row by a plurality of nozzles, and each nozzle is welded on respectively on the steam-distributing pipe, and integrally-built precision is not easy to guarantee, reduces the intensity and the impulsive force that form air knife; Adjacent two nozzle center's pitchs of holes are bigger, and the air knife continuity of formation is relatively poor.Also have, the air knife of formation is not the vertical impact pendular ring, causes the air knife impulsive force to reduce.
Summary of the invention
The technical problem to be solved in the present invention is: the shortcoming that exists at prior art is with not enough, the invention discloses a kind ofly can improve heat transfer efficiency in the drying cylinder, the built-in steam knife component of papermaking drying cylinder of energy savings.
At above-mentioned technical problem, the present invention proposes following technical scheme: comprise the central steam pipe that is arranged in the drying cylinder, and some groups of vapor collection steam pipes that evenly are arranged on drying cylinder inwall place, each vapor collection steam pipe is connected with central steam pipe by steam branch pipe, and offers the jet pipe hole at described vapor collection steam pipe over against the position of drying cylinder inwall.
Vapor collection steam pipe of the present invention is by the body of groove shape, the plug of body both sides, and the hermetically-sealed construction that surrounds of the nozzle plate of body end; The jet pipe hole is opened on the nozzle plate, and described jet pipe hole is joined by the converging transition of admission end and steam output end isometrical section and forms; Steam branch pipe comprises short steam branch pipe that is connected with the vapor collection steam pipe and the long steam branch pipe that is connected with central steam pipe, and short steam branch pipe is connected by bolt with long steam branch pipe; Every group of vapor collection steam pipe is four.
Beneficial effect of the present invention is embodied in: be provided with nozzle plate, the row's jet pipe that forms air knife is all directly offered on nozzle plate, avoided welding, precision guarantees easily; The jet pipe hole center distance of adjacent two jet pipes can reduce simultaneously, strengthens the air knife continuity that forms; The air knife vertical impact pendular ring that forms further improves the air knife impulsive force.Built-in steam knife component of papermaking drying cylinder of the present invention adopts tapering type spray vapour structure, make the high-temperature steam that is delivered to the vapor collection steam pipe by central steam pipe spray uniformly with higher flow velocity, thereby between spray vapour structure and drying cylinder inwall, form the high-speed and high-temperature water vapour stream-vapour cutter that reaches requirement of strength, the vapour cutter impacts the water ring of drying cylinder inwall, make water ring be in state of disturbance, the water ring thermal resistance of drying cylinder inwall is reduced, improved heat transfer efficiency greatly, reach purpose of energy saving.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention;
Fig. 2 is a left view of the present invention;
Fig. 3 is a vapour knife assembly structural representation of the present invention;
Fig. 4 is a nozzle plate structural representation of the present invention.
The specific embodiment
The invention will be further described below in conjunction with embodiment and accompanying drawing.
Embodiment
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, a kind of built-in steam knife component of papermaking drying cylinder, comprise the central steam pipe 2 that is arranged in the drying cylinder 1, drying cylinder 1 inwall place is provided with several vapor collection steam pipes 4 uniformly, vapor collection steam pipe 4 is four in the present embodiment, vapor collection steam pipe 4 communicates with central steam pipe 2 by several steam branch pipes, described steam branch pipe comprises by welding and is arranged on the short steam branch pipe 6 on the vapor collection steam pipe 4 and is arranged on long steam branch pipe 3 on the central steam pipe 2, short steam branch pipe 6 is connected by bolt 8 with long steam branch pipe 3, described vapor collection steam pipe 4 is the bodys by the groove shape, the plug 9 at body two ends, and the hermetically-sealed construction that surrounds of the nozzle plate 5 of body upper end, in order to reduce welding deformation, nozzle plate 5 is arranged on the body of vapor collection steam pipe 4 by soldering, offer several tapering type jet pipe holes 7 on the nozzle plate 5 uniformly, described jet pipe hole 7 is joined by the converging transition of admission end and steam output end isometrical section and forms, water vapour has improved flow velocity by converging transition, and the isometrical section water vapour presentation layer stream mode of guaranteeing to be sprayed by jet pipe hole 7 avoids occurring turbulent flow.
During work, steam enters central steam pipe 2 successively, steam branch pipe, vapor collection steam pipe 4, again by 7 ejections of the jet pipe hole on the nozzle plate 5, because jet pipe hole 7 is tapering type structure, make the water vapour steam kinetic energy of ejection increase, flow velocity improves, thereby between jet pipe hole 7 and drying cylinder 1 inwall, form the high-speed and high-temperature water vapour stream that reaches requirement of strength, promptly form so-called " vapour cutter ", by " vapour cutter " the condensed water water ring is impacted and disturbance, cause the turbulence of condensed water water ring, greatly reduce the thermal resistance of condensed water water ring layer, improved the heat-transfer effect of steam in the drying cylinder effectively.
Claims (5)
1. built-in steam knife component of papermaking drying cylinder, it is characterized in that: comprise the central steam pipe (2) that is arranged in the drying cylinder (1), and the some groups of vapor collection steam pipes (4) that evenly are arranged on drying cylinder (1) inwall place, each vapor collection steam pipe (4) is connected with central steam pipe (2) by steam branch pipe, and offers jet pipe hole (7) at described vapor collection steam pipe (4) over against the position of drying cylinder (1) inwall.
2. built-in steam knife component of papermaking drying cylinder according to claim 1 is characterized in that: described vapor collection steam pipe (4) is the plug (9) by the body of groove shape, body both sides, and the hermetically-sealed construction that surrounds of the nozzle plate of body end (5).
3. built-in steam knife component of papermaking drying cylinder according to claim 1 and 2 is characterized in that: described jet pipe hole (7) is opened on the nozzle plate (5), and described jet pipe hole (7) is joined by the converging transition of admission end and steam output end isometrical section and forms.
4. built-in steam knife component of papermaking drying cylinder according to claim 1, it is characterized in that: described steam branch pipe comprises short steam branch pipe (6) that is connected with vapor collection steam pipe (4) and the long steam branch pipe (3) that is connected with central steam pipe (2), and short steam branch pipe (6) is connected by bolt (8) with long steam branch pipe (3).
5. built-in steam knife component of papermaking drying cylinder according to claim 1 is characterized in that: described every group of vapor collection steam pipe (4) is four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010266421 CN101929096A (en) | 2010-08-30 | 2010-08-30 | Built-in steam knife component of papermaking drying cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010266421 CN101929096A (en) | 2010-08-30 | 2010-08-30 | Built-in steam knife component of papermaking drying cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101929096A true CN101929096A (en) | 2010-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010266421 Pending CN101929096A (en) | 2010-08-30 | 2010-08-30 | Built-in steam knife component of papermaking drying cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628239A (en) * | 2012-04-25 | 2012-08-08 | 陕西科技大学 | Papermaking dryer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3325910A (en) * | 1964-03-17 | 1967-06-20 | Waertsilae Oy Ab | Drying cylinder for drying the wet material web for instance in paper and cellulose machines |
| US4254561A (en) * | 1978-12-06 | 1981-03-10 | J. M. Voith Gmbh | Drying cylinder for a paper-making machine |
| CN2488949Y (en) * | 2001-07-26 | 2002-05-01 | 耿志印 | Drying equipment for paper making |
| CN101349026A (en) * | 2008-08-26 | 2009-01-21 | 陕西科技大学 | Steam knife type aqueous vapor injection apparatus in paper-making drying cylinder |
-
2010
- 2010-08-30 CN CN 201010266421 patent/CN101929096A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3325910A (en) * | 1964-03-17 | 1967-06-20 | Waertsilae Oy Ab | Drying cylinder for drying the wet material web for instance in paper and cellulose machines |
| US4254561A (en) * | 1978-12-06 | 1981-03-10 | J. M. Voith Gmbh | Drying cylinder for a paper-making machine |
| CN2488949Y (en) * | 2001-07-26 | 2002-05-01 | 耿志印 | Drying equipment for paper making |
| CN101349026A (en) * | 2008-08-26 | 2009-01-21 | 陕西科技大学 | Steam knife type aqueous vapor injection apparatus in paper-making drying cylinder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628239A (en) * | 2012-04-25 | 2012-08-08 | 陕西科技大学 | Papermaking dryer |
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Open date: 20101229 |