CN204589699U - A kind of steam chest adopting hot blast and superheated steam - Google Patents
A kind of steam chest adopting hot blast and superheated steam Download PDFInfo
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- CN204589699U CN204589699U CN201520160514.3U CN201520160514U CN204589699U CN 204589699 U CN204589699 U CN 204589699U CN 201520160514 U CN201520160514 U CN 201520160514U CN 204589699 U CN204589699 U CN 204589699U
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Abstract
The utility model discloses a kind of steam chest adopting hot blast and superheated steam, comprise hot-blast main, main steam range, steaming chamber, casing preheating chamber; The linkage section that steam branch pipe connects main steam range is level connection joint section, and this level connection joint section has a resistance section, the diameter of resistance section is less than the diameter of steam branch pipe; Hot-blast main is connected on the pipeline between the resistance section of steam branch pipe and steam inlet by hot blast manifold; The axis of hot blast manifold and steam branch pipe level connection joint section is angle α=30 ° ~ 60 °.Compared with prior art, only change the ratio of each steaming chamber steam of steam chest banner and hot blast, regulate moisture and the mass dryness fraction of paper banner, do not change each steaming chamber gas flow and pressure, thus avoid the flowing of steam between each steaming chamber.This steam chest and method not only reduce quantity and the size of valve, reduce and control cost, and avoid the adverse effect that mixed vapour impacts page generation.
Description
Technical field
The utility model relates to pulp and paper technology field, particularly relates to a kind of steam chest adopting hot blast and superheated steam.
Background technology
Steam chest is along paper banner uperize, steam is condensation in paper, release latent heat, thus improve the temperature of wet web, the surface tension reducing water in wet web and viscosity, wet end, the water separation capability of press section and the drying capacity in drying cylinder portion can be improved, the uniformity of paper web moisture profile content can be regulated simultaneously, the printing performance of paper and the coating performance of coated paper after press polish can be improved, and the banner uniformity of printing performance, therefore steam chest is widely used on various paper machine, particularly requires on higher speciality paper machine product quality.
Traditional steam chest regulates the function of paper web moisture profile content to be by steam chest is divided into multiple steaming chamber along banner, regulates separately the steam flow entering each steaming chamber to realize.The shortcoming of this method is when a steaming chamber flow-rate ratio is lower, the steam of the steaming chamber that ambient fluid is high will flow through and supplement, particularly when steam chest be arranged on wet end and vacuum tank with the use of time, the shortcoming of this method just clearly, steam flow when some rooms declines, during ability lower than vacuum draw, vacuum tank extracts steam by from the large steaming chamber of the steam flow of surrounding, even if the steaming chamber that flow is little is positioned at both sides, because side plate is thicker than middle dividing plate, even also has other spacer assembly, therefore the possibility that extracting air is supplementary is smaller, such vacuum tank just makes steam flow everywhere to even future development, thus have impact on the regulating effect of steam chest.
US Patent No. 3945881 is in order to solve the problem, by vacuum tank being also divided into the vacuum chamber of quantity same with steam chest, and control separately, thus when a certain room steam flow reduces, the stream of bleeding of corresponding vacuum chamber also reduces, but the shortcoming of this method to adopt two cover control systems, makes vacuum tank become more complicated simultaneously.
US Patent No. 4249992 and US4331510 propose another solution, banner each room steam flow is identical with pressure, paper web moisture profile content is regulated by the contact area changing banner each room steam and paper, the larger vapor action time is provided to the position of high humidity, the contact area of steam and paper is then reduced at the position that humidity is little, steam flow due to each room is identical, therefore steam flow can not flow between each room, but this method needs complexity, unique internal structure.
Summary of the invention
The purpose of this utility model is the shortcoming and defect overcoming above-mentioned prior art, provides a kind of steam chest adopting hot blast and superheated steam.Compared with prior art, only change the ratio of each steaming chamber steam of steam chest banner and hot blast, regulate moisture and the mass dryness fraction of paper banner, do not change each steaming chamber gas flow and pressure, thus avoid the flowing of steam between each steaming chamber.
The utility model is achieved through the following technical solutions:
Adopt a steam chest for hot blast and superheated steam, comprise the casing preheating chamber 13 of hot-blast main 1, main steam range 5, steam chest 11, multiple steaming chamber 11-1 by baffle interval, steam chest 11 outside; Casing preheating chamber 13 connects main steam range 5 by pre-hot leg pipe 10; Steaming chamber 11-1 is communicated with hot-blast main 1 and main steam range 5 by many steam branch pipes 6;
Described hot-blast main 1 is arranged on the top of main steam range 5, and the linkage section that described steam branch pipe 6 connects main steam range 5 is level connection joint section, this level connection joint section has a resistance section 6-1, and the diameter of resistance section 6-1 is less than the diameter of steam branch pipe 6;
Described hot-blast main 1 is connected on the pipeline between the resistance section 6-1 of steam branch pipe 6 and steam inlet by hot blast manifold 3; Described hot blast manifold 3 and the axis of steam branch pipe 6 level connection joint section are angle α=30 ° ~ 60 °, and the superheated steam in the hot blast in hot blast manifold 3 and main steam range 5 is entered in steam branch pipe 6 in opposite directions with the angle of 30 ° ~ 60 °.
Described steam branch pipe 6 is connected on the sidewall of the paper delivery end of steam chest 11 l Water Paper page, and direction when making the steam in every root steam branch pipe 6 enter corresponding steaming chamber 11-1 is contrary with l Water Paper page traffic direction.
Described main steam range 5 side's of being taper house steward, hot-blast main 1 is round tube; The arrival end of hot-blast main 1 is provided with hot blast master control valve 2, the tail end plugs of hot-blast main 1.Described hot blast manifold (3) is provided with arm control valve (4).
The diameter of described hot blast manifold 3 is less than the diameter of steam branch pipe 6; The length of resistance section 6-1 is 80 ~ 150mm.
Described main steam range 5 steam approach section is provided with steam control valve 6, and described pre-hot leg pipe 10 is connected to the upstream of steam control valve 6, and pre-hot leg pipe 10 is provided with warm-up control valve 9.
Described casing preheating chamber 13 is also provided with the opposing steam flow pipe 14 of a band valve.
The end of described main steam range 5 is provided with drain valve 8.
The steam (vapor) outlet of described steaming chamber 11-1 is provided with hole array base plate 12.
Steam chest regulates the method for paper web moisture profile content as follows:
Steam chest warm-up phase
First hot blast master control valve 2 and steam control valve 7 is closed, open the warm-up control valve 9 on pre-hot leg pipe 10 and the valve on opposing steam flow pipe 14, superheated steam in now main steam range 5 enters in casing preheating chamber 13, first carry out preheating before operation to steam chest 11, object produces condensed water when preventing the steam in steam branch pipe 6 from entering in steaming chamber 11-1; When the temperature of steam chest 11 reaches superheat steam temperature, complete the preheating of steam chest;
Steam chest working stage
After steam chest 11 preheating completes, open hot blast master control valve 2 and steam control valve 7 simultaneously, now, hot blast manifold 3 and the axis of steam branch pipe 6 level connection joint section are angle α=30 ° ~ 60 °, hot blast in hot blast manifold 3 and the superheated steam in main steam range 5 are entered in steam branch pipe 6 in opposite directions with the angle of 30 ° ~ 60 ° mix, form mixed vapour;
When mixed vapour is through resistance section 6-1, add the passage resistance of mixed vapour, to reduce hot air flow change to the impact entering mixed vapour flow in each steaming chamber 11-1, continue after mixed vapour passage resistance section 6-1 to enter in corresponding steaming chamber 11-1 downwards along steam branch pipe 6, direction when mixed vapour enters in corresponding steaming chamber 11-1 is contrary with l Water Paper page traffic direction; Then, the mixed vapour in steaming chamber 11-1 is sprayed onto on the page of paper by the hole array base plate 12 being arranged on the outlet of steam chest 11 mixed vapour again.
Superheat steam temperature is 120 DEG C ~ 130 DEG C; Hot blast temperature in hot-blast main 1 is 70 DEG C ~ 90 DEG C.
The utility model, relative to prior art, has following advantage and effect:
The utility model main steam range is the taper house steward by the design of Bai Nasi equation, hot blast mixes with the level connection joint section of superheated steam at steam branch pipe 6, again through resistance section after mixing, when mixed vapour is through resistance section 6-1, add the passage resistance of mixed vapour, decrease hot air flow change to the impact entering mixed vapour flow in each steaming chamber 11-1, the direction of advance of adding hot blast and superheated steam is that the angle of 30 ° ~ 60 ° enters in steam branch pipe in opposite directions, therefore the flow entering steam chest each steaming chamber mixed vapour is substantially equal, that is increase hot air flow and corresponding minimizing will enter the steam flow of steam branch pipe.Direction when mixed vapour in every root steam branch pipe enters corresponding steaming chamber is contrary with l Water Paper page traffic direction, and the mixed vapour injection direction that is entered in steaming chamber is vertical with the direction of page.Such one side avoids mixed vapour and impacts the adverse effect that page produces, to prevent on the other hand in mixed vapour may with condensed water be sprayed onto on page, thus affect the quality of paper.
Steam chest improves paper machine dewatering efficiency, the function reducing Paper Moisture content is mainly realized by steam condensation release latent heat in l Water Paper page, and hot blast thermal content is less than steam, hot blast can only play heat effect to the surface of paper simultaneously, therefore the effect of hot blast reduction Paper Moisture content is nothing like steam, adding this steam chest adopts superheated steam and temperature lower than the hot blast of steam, the effect of hot blast is just poorer comparatively speaking, on the other hand, hot blast is on-condensible gas, the condensation of steam in paper can be stoped, therefore the flow reducing the corresponding increase hot blast of flow of steam just can reduce the steam chest effect of corresponding site, thus by regulating the ratio of hot blast and steam just can reach the object regulating Paper Moisture content.
In addition, adopt hot blast and superheated steam mixing to regulate, guarantee that the gas flow in each steaming chamber is equal with pressure, thus avoid and flowed between each steaming chamber by steam and affect regulating effect.
Only arm control valve is set on hot blast manifold, by means of only arm control valve, hot air flow is controlled, and do not control the flow of superheated steam, as can be seen here, the method for this steam chest and adjustment Paper Moisture thereof, not only reduces quantity and the size of valve, reduce and control cost, and avoid mixed vapour and impact the adverse effect that page produces, and to prevent in mixed vapour may with condensed water be sprayed onto on page, thus affect the quality of paper.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is A-A cross-sectional view in Fig. 1.
Fig. 3 is the utility model main steam range structural representation.
Detailed description of the invention
Below in conjunction with specific embodiment, the utility model is more specifically described in detail.
Embodiment
As shown in Figures 1 to 3.The utility model adopts the steam chest of hot blast and superheated steam, comprises the casing preheating chamber 13 of hot-blast main 1, main steam range 5, steam chest 11, multiple steaming chamber 11-1 by baffle interval, steam chest 11 outside; Casing preheating chamber 13 connects main steam range 5 by pre-hot leg pipe 10; Steaming chamber 11-1 is communicated with hot-blast main 1 and main steam range 5 by many steam branch pipes 6;
Described hot-blast main 1 is arranged on the top of main steam range 5, and the linkage section that described steam branch pipe 6 connects main steam range 5 is level connection joint section, this level connection joint section has a resistance section 6-1, and the diameter of resistance section 6-1 is less than the diameter of steam branch pipe 6;
Described hot-blast main 1 is connected on the pipeline between the resistance section 6-1 of steam branch pipe 6 and steam inlet by hot blast manifold 3; Described hot blast manifold 3 and the axis of steam branch pipe 6 level connection joint section are angle α=30 ° ~ 60 °, and the superheated steam in the hot blast in hot blast manifold 3 and main steam range 5 is entered in steam branch pipe 6 in opposite directions with the angle of 30 ° ~ 60 °.For increasing the passage resistance of steam, reduce the impact of hot air flow change on steam flow in each steam branch pipe 6.
Described steam branch pipe 6 is connected on the sidewall of the paper delivery end of steam chest 11 l Water Paper page, and direction when making the steam in every root steam branch pipe 6 enter corresponding steaming chamber 11-1 is contrary with l Water Paper page traffic direction.
Described main steam range 5 side's of being taper house steward (or conical house steward), its size designs by Bai Nasi equation, thus guarantees from steam branch pipe 6 steam pressure out equal with flow.Hot-blast main 1 is round tube; The arrival end of hot-blast main 1 is provided with hot gas master control valve 2, the tail end plugs of hot-blast main 1; Hot blast manifold 3 is provided with arm control valve 4.Regulate the aperture of arm control valve 4, thus control along the hot air flow in paper machine laterally each steaming chamber 11-1, control the steam flow entered in each steaming chamber 11-1 conversely, the diameter of hot blast manifold 3 is less than the diameter 0.4 ~ 0.6 times of steam branch pipe 6.
The diameter of described hot blast manifold 3 is less than the diameter (diameter of hot blast manifold 3 equals 0.4 ~ 0.6 times of steam branch pipe 6 diameter) of steam branch pipe 6; The length of resistance section 6-1 is 80 ~ 150mm.Due to the effect of resistance section 6-1, thus increase the passage resistance of superheated steam and hot blast, reduce hot air flow change to the impact entering steam flow in each steaming chamber 11-1.
Described main steam range 5 steam approach section is provided with steam control valve 7, and described pre-hot leg pipe 10 is connected to the upstream of steam control valve 7, and pre-hot leg pipe 10 is provided with warm-up control valve 9.Warm-up control valve 9 enters flow in casing preheating chamber 13 for controlling superheated steam.
Described casing preheating chamber 13 is also provided with the opposing steam flow pipe 14 of a band valve.The Steam Heating Posterior circle in casing preheating chamber 13 can be made to utilize and discharge the condensed water in casing preheating chamber 13, thus guarantee the temperature of steam chest casing.
The end of described main steam range 5 is provided with drain valve 8, for the condensed water in exhaust steam house steward 5.
The steam (vapor) outlet of steaming chamber 11-1 is provided with hole (or seam) array base plate 12, for uperize to l Water Paper page.
Regulate the method for paper web moisture profile content, realize by following two stages:
Steam chest warm-up phase
First hot blast master control valve 2 and steam control valve 7 is closed, open the warm-up control valve 9 on pre-hot leg pipe 10 and the valve on opposing steam flow pipe 14, superheated steam in now main steam range 5 enters in casing preheating chamber 13, first carry out preheating before operation to steaming chamber 11-1, object produces condensed water when preventing the steam in steam branch pipe 6 from entering in steaming chamber 11-1; When the temperature of steam chest 11 reaches superheat steam temperature, complete the preheating of steam chest;
Steam chest working stage
After steam chest 11 preheating completes, open hot blast master control valve 2 and steam control valve 7 simultaneously, now, hot blast manifold 6 and the axis of steam branch pipe 6 level connection joint section are angle α=30 ° ~ 60 °, hot blast in hot blast manifold 3 and the superheated steam in main steam range 5 are entered in steam branch pipe 6 in opposite directions with the angle of 30 ° ~ 60 ° mix, form mixed vapour; Steam branch pipe 6 does not have valve, and the steam flow of each steam branch pipe 6 does not regulate separately;
When mixed vapour is through resistance section 6-1, add the passage resistance of mixed vapour, to reduce hot air flow change to the impact entering mixed vapour flow in each steaming chamber 11-1, continue after mixed vapour passage resistance section 6-1 to enter in corresponding steaming chamber 11-1 downwards along steam branch pipe 6; Then, the mixed vapour in steaming chamber 11-1 is sprayed onto on the page of paper by the hole array base plate 12 being arranged on the outlet of steam chest 11 mixed vapour again.
By suitably regulating the valve opening on warm-up control valve 9 and opposing steam flow pipe 14, the steam flow in casing preheating chamber 13 can be controlled.
As mentioned above, direction when mixed vapour enters in corresponding steaming chamber 11-1 is contrary with l Water Paper page traffic direction, that is to enter the direction of steaming chamber 11-1 vertical with the direction that steam sprays to l Water Paper page for mixed vapour, such one side avoids the adverse effect that mixed vapour impacts page generation, to prevent on the other hand in steam may with condensed water be sprayed onto on page, further ensure the quality of paper.
Superheat steam temperature is 120 DEG C ~ 130 DEG C; Hot blast temperature in hot-blast main 1 is 70 DEG C ~ 90 DEG C.The ratio of hot blast and superheated steam is 0 ~ 30%.
As mentioned above, just the utility model can be realized preferably.
Embodiment of the present utility model is not restricted to the described embodiments; other are any do not deviate from Spirit Essence of the present utility model and principle under do change, modification, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (8)
1. adopt a steam chest for hot blast and superheated steam, comprise the casing preheating chamber (13) of hot-blast main (1), main steam range (5), steam chest (11), multiple steaming chamber by baffle interval (11-1), steam chest (11) outside; Casing preheating chamber (13) connects main steam range (5) by pre-hot leg pipe (10); Steaming chamber (11-1) is communicated with hot-blast main (1) and main steam range (5) by many steam branch pipes (6); It is characterized in that:
Described hot-blast main (1) is arranged on the top of main steam range (5), the linkage section that described steam branch pipe (6) connects main steam range (5) is level connection joint section, this level connection joint section has a resistance section (6-1), the diameter of resistance section (6-1) is less than the diameter of steam branch pipe (6);
Described hot-blast main (1) is connected on the pipeline between the resistance section (6-1) of steam branch pipe (6) and steam inlet by hot blast manifold (3); The axis of described hot blast manifold (3) and steam branch pipe (6) level connection joint section is angle α=30 ° ~ 60 °, and the superheated steam in the hot blast in hot blast manifold (3) and main steam range (5) is entered in steam branch pipe (6) in opposite directions with the angle of 30 ° ~ 60 °.
2. steam chest according to claim 1, it is characterized in that: described steam branch pipe (6) is connected on the sidewall of the paper delivery end of steam chest (11) l Water Paper page, direction when making the steam in every root steam branch pipe (6) enter corresponding steaming chamber (11-1) is contrary with l Water Paper page traffic direction.
3. steam chest according to claim 1 and 2, is characterized in that: described main steam range (5) for square taper house steward, hot-blast main (1) be round tube; The arrival end of hot-blast main (1) is provided with hot gas master control valve (2), the tail end plugs of hot-blast main (1); Described hot blast manifold (3) is provided with arm control valve (4).
4. steam chest according to claim 3, it is characterized in that: the diameter of described hot blast manifold (3) is less than the diameter of steam branch pipe (6), and namely the diameter of hot blast manifold (3) equals 0.4 ~ 0.6 times of steam branch pipe (6) diameter; The length of resistance section (6-1) is 80 ~ 150mm.
5. steam chest according to claim 3, it is characterized in that: described main steam range (5) steam approach section is provided with steam control valve (7), described pre-hot leg pipe (10) is connected to the upstream of steam control valve (7), pre-hot leg pipe (10) is provided with warm-up control valve (9).
6. steam chest according to claim 3, is characterized in that: described casing preheating chamber (13) is also provided with the opposing steam flow pipe (14) of a band valve.
7. steam chest according to claim 3, is characterized in that: the end of described main steam range (5) is provided with drain valve (8).
8. steam chest according to claim 3, is characterized in that: the steam (vapor) outlet of steaming chamber (11-1) is provided with hole array base plate (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520160514.3U CN204589699U (en) | 2015-03-19 | 2015-03-19 | A kind of steam chest adopting hot blast and superheated steam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520160514.3U CN204589699U (en) | 2015-03-19 | 2015-03-19 | A kind of steam chest adopting hot blast and superheated steam |
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| CN204589699U true CN204589699U (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520160514.3U Withdrawn - After Issue CN204589699U (en) | 2015-03-19 | 2015-03-19 | A kind of steam chest adopting hot blast and superheated steam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104746379A (en) * | 2015-03-19 | 2015-07-01 | 华南理工大学 | Steam box adopting hot air and overheated steam and method for adjusting paper sheet moisture |
| CN107120947A (en) * | 2017-05-18 | 2017-09-01 | 中国科学院理化技术研究所 | A kind of hot blast superheat steam drying system |
-
2015
- 2015-03-19 CN CN201520160514.3U patent/CN204589699U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104746379A (en) * | 2015-03-19 | 2015-07-01 | 华南理工大学 | Steam box adopting hot air and overheated steam and method for adjusting paper sheet moisture |
| CN107120947A (en) * | 2017-05-18 | 2017-09-01 | 中国科学院理化技术研究所 | A kind of hot blast superheat steam drying system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150826 Effective date of abandoning: 20171114 |
|
| AV01 | Patent right actively abandoned |