CN1414174A - Paper machine stable pressure drying equipment - Google Patents
Paper machine stable pressure drying equipment Download PDFInfo
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- CN1414174A CN1414174A CN 01127573 CN01127573A CN1414174A CN 1414174 A CN1414174 A CN 1414174A CN 01127573 CN01127573 CN 01127573 CN 01127573 A CN01127573 A CN 01127573A CN 1414174 A CN1414174 A CN 1414174A
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Abstract
A pressure-stabilizing drying unit for paper making machine is composed of the master baking cylinder set, the intermediate baking cylinder set and the wet-end baking cylinder set, which are sequentially communicated via steam-water separators and pipelines, and features that their steam-water separators are serially connected and finally communicated to an open water container. Its advantages are high pressure stability, less breaking of paper and high output of paper.
Description
Technical field the invention belongs to the dryer section field of the paper machine of making continuous webs of paper, is specifically related to a kind of equipment of getting rid of condensed water from drying cylinder.
" the up-to-date paper machine making technology " of publishing background technology light industry publishing house in August, 1999 (write by the B.A. handkerchief [U.S.] that continues, Cao Bangwei translates) in being discussed below about " papermaking equipment drying section segmentation step-down equipment ": this equipment contains three groups of cylinder group, is respectively: master control cylinder group, middle cylinder group, green end cylinder group.Drying pressure is set in the master control cylinder group, and each group cylinder group all connects a steam-water separator, and each group cylinder group is all passed through to replenish steam valve and linked to each other with live steam pipe.During work, steam enters the master control cylinder group, and blowing steam and condensate water are discharged from cylinder group then, with steam-water separator blowing steam and condensate water is separated.Cylinder group in the middle of blowing steam enters by pipeline, the steam pressure of middle cylinder group is according to the required pressure differential resetting of master control cylinder group.Cylinder group in the middle of the operating pressure of green end cylinder group is lower than is sent into vacuum condenser from blowing steam and condensate water that the green end cylinder group is come out.With a vavuum pump fixed gas in the system is taken away.Blowing steam is expelled the fixed gas in all drying cylinders, is taken away by vavuum pump at last.On master control cylinder group and middle cylinder group, exhaust-valve is arranged.These exhaust-valves are closed under the normal condition.But when pressure reduction can't be kept, exhaust-valve was just opened, and directly steam discharge goes condenser to guarantee not spill-over of drying cylinder.
Steam and condensate water pressure drop stage device are widely used, but there is following limitation in it:
(1) certain operating range limiting is arranged.It is too low that the pressure of master control cylinder group can not be set, otherwise will make pressure reduction not enough, or need excessive emptying.And that pressure is set is too high, and then green end cylinder group pressure may be higher again concerning paper quality.Therefore need take different control strategies, and this makes the equipment design complicated.
(2) control device is huger.The variation of steam pressure will make all drying cylinder pressure change.For guaranteeing the moisture Control of paper roll, must accurately regulate, operation is difficult for realizing and accurate control makes drying section seem too huge again.
(3) equipment is difficult for forming different drying cylinder layouts.The specification of steam pipeline section depends on the blowing steam amount, and the layout of equipment is bad to be complementary with transmission mechanism.
(4) equipment is difficult for handling failure.Because all drying cylinders all are related mutually, the reason that is difficult to find out fault where.
Summary of the invention the invention provides a kind of stable equipment of outlet steam pressure difference that can realize the master control cylinder group and the green end cylinder group of drying section of paper machine easily in order to overcome the unsettled defective of logical steam pressure difference of existing paper machine drying equipment.The technical solution used in the present invention is: set gradually the master control cylinder group in the equipment, middle cylinder group and green end cylinder group, the air inlet of master control cylinder group communicates with the main steam header road by pipeline, the gas outlet of master control cylinder group connects the air inlet of master control steam-water separator by pipeline, the air inlet of cylinder group in the middle of the gas outlet of master control steam-water separator connects by pipeline, the air inlet of steam-water separator in the middle of the gas outlet of middle cylinder group connects, the gas outlet of middle steam-water separator connects the air inlet of green end cylinder group by pipeline, the gas outlet of green end cylinder group connects the air inlet of green end steam-water separator by pipeline, it is characterized in that being interconnected between the described steam-water separator, the green end steam-water separator is connected by pipeline with a uncovered jug.
Main end steam-water separator of the present invention communicates with middle steam-water separator by pipeline, middle steam-water separator communicates with the green end steam-water separator by steam pipework, the green end steam-water separator communicates with a uncovered jug by steam pipework, and steam pipework communicates with uncovered jug by pipeline, valve and condensate pump.
Condensate pump quantity of the present invention is three, the steam pipework in the middle of the entrance point of each condensate pump connects between steam-water separator and the green end steam-water separator, and the port of export of each condensate pump communicates with uncovered jug by pipeline.
The present invention is because the method that has adopted steam-water separator to be connected with uncovered jug, make that the steam pressure difference of master control cylinder group and green end cylinder group outlet is stable, the temperature of drying cylinder also tends towards stability, and the moisture of page can not produce big fluctuation, has reduced the possibility of paper break in the dry run; Simultaneously, dryer temperature curve stable eliminated because the paper expansion and contraction problem greatly that pressure changes paper surface seersucker problem that the too urgent drying that causes brings and produces owing to rapid contraction in local baking the district in, improved the quality of product; Because the method that has adopted steam-water separator to be connected with uncovered jug is regulated the steam pressure difference of master control cylinder group and the outlet of green end cylinder group automatically, overcome and utilized instrument to regulate the deficiency of vapour pressure in the legacy equipment, make equipment simple, also reduced manual operation error, reduced labour intensity; And in actual applications,, thereby saved energy resource consumption to the also corresponding reduction of pressure requirement of main steam pipe.
Description of drawings Fig. 1 is the structural representation of the embodiment of the invention.
Among specific embodiment Fig. 1: the air inlet of master control cylinder group 4 communicates with main steam header road 2 by pipeline, the gas outlet of master control cylinder group 4 connects the air inlet of master control steam-water separator 17 by pipeline, the air inlet of cylinder group 6 in the middle of the gas outlet of master control steam-water separator 17 connects by pipeline 5, the air inlet of steam-water separator 13 in the middle of the gas outlet of middle cylinder group 6 connects, the gas outlet of middle steam-water separator 13 connects the air inlet of green end cylinder group 8 by pipeline 7, the gas outlet of green end cylinder group 8 is by the air inlet of pipeline 9 connection green end steam-water separators 10, and the outlet of green end steam-water separator 10 links to each other with jug 11 by pipeline.Be communicated with by pipeline 15,13 respectively between master control steam-water separator 17, middle steam-water separator 14 and the green end steam-water separator 10.
During production, open stop valve 1, steam enters master control cylinder group 4 through main steam pipe 2 and pipeline 3, steam and condensate water are discharged from master control cylinder group 4 and 18 are entered master control steam-water separator 17 by the road then, at this, steam separates with condensate water, cylinder group 6 in the middle of steam enters by pipeline 5, and the steam pressure of middle cylinder group is according to the required pressure differential resetting of master control cylinder group 4.Then, steam and condensate water are discharged by pipeline 16 from middle cylinder group 6 and are entered middle steam-water separator 14, at this, steam separates with condensate water, steam enters green end cylinder group 8 by pipeline 7, cylinder group in the middle of the operating pressure of green end cylinder group is lower than is sent into green end steam-water separator 10 from steam and condensate water that green end cylinder group 8 is come out; At last, steam and condensed water in the green end steam-water separator 10 are mixed into jug 11, because the steam pressure of this moment is lower, temperature is lower, therefore can condensation in jug.
During ordinary production, the pressure differential maintain at the two ends of requirement master control cylinder group 4, middle cylinder group 6 and green end cylinder group 8 is constant, just require the pressure differential maintain between the gas outlet of the air inlet of master control cylinder group and green end cylinder group constant, could guarantee that the page quality of producing is qualified.Because each cylinder group all connects steam-water separator by pipeline, require the gas pressure in each steam-water separator to keep constant afterwards.During production, the pressure that enters master control cylinder group 4 in the live steam pipe 2 is stable, if the hypertonia in the master control steam-water separator 15, then the condensed water in the separator enters in the middle steam-water separator 14 by pipeline 15 under the effect of air pressure, thereby the decline of water table in the master control steam-water separator 17, the volume on separator top increases, and then gas pressure reduces.In like manner, if the hypertonia in the middle steam-water separator 14, then the condensed water in the separator enters in the green end steam-water separator 10 by pipeline 13 under the effect of air pressure; Because green end steam-water separator 10 communicates with uncovered jug 11, like this, the steam pressure in the green end steam-water separator 10 approaches atmospheric pressure, thereby the steam pressure of green end cylinder group outlet approaches atmospheric pressure; So, realized steam pressure stable of green end cylinder group outlet.When the steam pressure on green end steam-water separator top was too high, water and part steam in the separator were discharged into jug, thereby decline of water table, and the volume on separator top increases, and pressure reduces; Cross when low when the steam pressure on green end steam-water separator top, the water in the uncovered jug enters separator, and separator water level goes up, the smaller volume on its top, thus pressure increases.Because three steam-water separators communicate and communicate with uncovered jug, therefore,, when entering three steam-water separators, all can obtain balance adjustment preferably no matter the steam pressure of discharging in the master control cylinder group is too high or low excessively.
Under the situation that obtains three pressure stabilitys in the steam-water separator by the way, the pressure of whole system and the pressure reduction between each section have also been realized stable.
For realizing the pressure reduction stable equilibrium in the steam-water separator rapidly, objectively require the water in the steam-water separator to discharge as early as possible.Therefore three condensate pumps 12 are set on the steam pipework 13 between middle steam-water separator and the green end steam-water separator, and the entrance point of condensate pump 12 connects steam pipework 13, and the port of export of condensate pump 12 communicates with uncovered jug 11 by pipeline.Like this, the water of discharging in middle steam-water separator and in the green end steam-water separator can be discharged to the uncovered jug 11 by condenser pump rapidly.
Claims (3)
1. paper machine stable pressure drying equipment, comprise the master control cylinder group that sets gradually in the equipment, middle cylinder group and green end cylinder group, the air inlet of master control cylinder group communicates with the main steam header road by pipeline, the gas outlet of master control cylinder group connects the air inlet of master control steam-water separator by pipeline, the air inlet of cylinder group in the middle of the gas outlet of master control steam-water separator connects by pipeline, the air inlet of steam-water separator in the middle of the gas outlet of middle cylinder group connects, the gas outlet of middle steam-water separator connects the air inlet of green end cylinder group by pipeline, the gas outlet of green end cylinder group connects the air inlet of green end steam-water separator by pipeline, it is characterized in that being interconnected between the described steam-water separator, the green end steam-water separator is connected by pipeline with a uncovered jug.
2. paper machine stable pressure drying equipment according to claim 1, it is characterized in that main end steam-water separator communicates with middle steam-water separator by pipeline, middle steam-water separator communicates with the green end steam-water separator by steam pipework, the green end steam-water separator communicates with a uncovered jug by steam pipework, and steam pipework communicates with uncovered jug by pipeline, valve and condensate pump.
3. paper machine stable pressure drying equipment according to claim 2, it is characterized in that condensate pump quantity is three, steam pipework in the middle of the entrance point of each condensate pump connects between steam-water separator and the green end steam-water separator, the port of export of each condensate pump communicates with uncovered jug by pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01127573 CN1205385C (en) | 2001-10-26 | 2001-10-26 | Paper machine stable pressure drying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01127573 CN1205385C (en) | 2001-10-26 | 2001-10-26 | Paper machine stable pressure drying equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1414174A true CN1414174A (en) | 2003-04-30 |
| CN1205385C CN1205385C (en) | 2005-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01127573 Expired - Fee Related CN1205385C (en) | 2001-10-26 | 2001-10-26 | Paper machine stable pressure drying equipment |
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| Country | Link |
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| CN (1) | CN1205385C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086608A (en) * | 2009-11-19 | 2011-06-08 | 美卓造纸机械公司 | Steam and condensate system for dryer section of fiber web machine |
| CN102776800A (en) * | 2012-07-13 | 2012-11-14 | 成都依瑞克科技有限公司 | Windless dryer |
| CN102776799A (en) * | 2012-07-13 | 2012-11-14 | 成都依瑞克科技有限公司 | Heated air circulation drying system |
| CN108468246A (en) * | 2017-02-23 | 2018-08-31 | 合肥银山棉麻股份有限公司 | Copy dregs of rice drying cylinder set vapour heating device |
-
2001
- 2001-10-26 CN CN 01127573 patent/CN1205385C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086608A (en) * | 2009-11-19 | 2011-06-08 | 美卓造纸机械公司 | Steam and condensate system for dryer section of fiber web machine |
| CN102086608B (en) * | 2009-11-19 | 2013-07-24 | 美卓造纸机械公司 | Steam and condensate system for dryer section of fiber web machine |
| CN102776800A (en) * | 2012-07-13 | 2012-11-14 | 成都依瑞克科技有限公司 | Windless dryer |
| CN102776799A (en) * | 2012-07-13 | 2012-11-14 | 成都依瑞克科技有限公司 | Heated air circulation drying system |
| CN108468246A (en) * | 2017-02-23 | 2018-08-31 | 合肥银山棉麻股份有限公司 | Copy dregs of rice drying cylinder set vapour heating device |
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| Publication number | Publication date |
|---|---|
| CN1205385C (en) | 2005-06-08 |
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Granted publication date: 20050608 Termination date: 20111026 |