CN104294697B - The drier structure of pulp making process and the control system of drying machine and method - Google Patents
The drier structure of pulp making process and the control system of drying machine and method Download PDFInfo
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- CN104294697B CN104294697B CN201410306412.8A CN201410306412A CN104294697B CN 104294697 B CN104294697 B CN 104294697B CN 201410306412 A CN201410306412 A CN 201410306412A CN 104294697 B CN104294697 B CN 104294697B
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- cooling end
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0009—Paper-making control systems
- D21G9/0036—Paper-making control systems controlling the press or drying section
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Abstract
The present invention relates to the drier structure of pulp making process and the control system of drying machine and method.Drier structure includes compact drying machine unit, the device (33,34) for supplying air to base section (23) and the device (31) for air to be discharged from discharge part (21).Compact drying machine unit is made up of the integrated discharge part (21) on a side of the drying machine unit, the base section (23) being disposed adjacent on the relative side of the drying machine part (22) of discharge part (21) and the drying machine unit.Base section (23) is positioned proximate to drying machine portion (22).
Description
Technical field
Improved drier structure the present invention relates to be used for pulp making process.Further, the present invention relates to be used to do
The improved control system of dry machine and the improved control method for drying machine.
Background technology
According to prior art it is most of as drier structure generally run in the following manner.With approximate 50%
The wet web such as pulp web of dry matter content reaches drier structure, and is generally supplied from above drier structure
In.The horizontal level of some blower fans is acted in whole length of the gross section region of web and drying machine.Dry gas
Body, it is, for example, hot-air, steam or is suitable for any other medium of the purpose, and nozzle is passed through from the horizontal level of fan
Web is blowed to from both sides.In such contactless drying, web is advanced inside drier structure, from the drier structure
Horizontal level higher towards drier structure low portion move forward and backward.When web leaves the bottom portion of drier structure
Timesharing, the dry matter content of web is typically about 90%.
The such known drier structure of pulp web for example shows in fig. 1 and 2.
Building 100 is included by according to low portion 123, supply section 124, drying machine major part 122 and top
Discharge part 121 with the drying machine portion that is made of order.Drying machine portion is designed in fig. 1 and 2 by the whole of shade instruction
Body.Low portion 123 plays a part of cooling end, and with the cooling end fan of integration, for cooling air supply to be arrived
Cooling end 123, and cooling air is left cooling end and enter into building 100.Supply section 124 is from building 100
External reception supply air, and by supply air be sent to drying machine major part 122 to perform the drying of pulp web,
Then supply air is sent to top discharge part 121 from this.Discharge air is discharged to building from top discharge part 121
The outside of thing 100.Discharge air is discharged to heat reclamation device 131 from top discharge part 121, in heat reclamation device 131,
Supply air can be preheated and be transported to supply section 124.
Cooling end 123 is shown in accompanying drawing mark from the inside of building 100 or the external reception cooling air from building 100
Note 133, and by cooling air supply to building 100, see reference 139.Air is fed to drying from supply section 124
Machine major part 122, to perform the drying of pulp web, is then fed to top discharge part 121 from this, such as reference
Shown in 132.Discharge air is discharged to heat recovery system from top discharge part 121, sees reference 131.
In such drier structure, still there is room for improvement.
The content of the invention
It is therefore an object of the present invention to provide improved drier structure.Further, it will thus provide for the improvement of drying machine
Control system and the improved control method for drying machine.
In the present invention, the drier structure for pulp making process includes compact drying machine unit, the drying machine
Unit by the integrated discharge part on a side of the drying machine unit, be disposed adjacent to the drying of discharge part
Machine part and the base section on the relative side of the drying machine unit are constituted.Drier structure is also included for inciting somebody to action
Device of the air supply to the device of base section and for air to be discharged from discharge part.And, base section can
It is disposed adjacent to drying machine part.
In drier structure, air is supplied to base section, and it is dry dry to be supplied effectively directly into generation from this
In dry machine interior section.The supply section that need not be used between base section and drying machine part so far.It is such
Drier structure has the advantage that supply air conduit and supply fan can be omitted, and cause cost to reduce.
And, drier structure includes the feeder for air to be fed to discharge part from base section.The bottom of except
Outside the entirety of portion part, drying machine part and discharge part, the supply air from base section does not enter building
Inner space, but arrive some of bottom upper directly up.Air can be immediately available for drying.Drying machine enters
The conduit that mouth arrives drying machine part on the side shortens, and causes cost to reduce.
In drier structure, discharge part can be arranged on the top side of drying machine unit, and base section can set
Put in the bottom side of drying machine unit.Feeder for air to be fed into discharge part from base section can be set to,
So as to be supplied as the cooling air of the supply air of drying machine part from bottom.
Therefore, it is possible to omit use in the prior art by cooling air supply to cooling end and from the cooling end supply
To the cooling-air duct in the inner space of building.Identical throughput of air but sets less fan, causes cost
Reduce, and less power consumption that fan runs.
In drier structure, compact drying machine unit can be arranged in drying machine building, and for by sky
The device that gas is fed to base section can be set to so that inside or drying of the air of bottom from drying machine building
The outside of machine building.
Because cooling air is not fed in building from cooling end, cooling air does not increase the heat in building
Amount and humidity load.
In one application, drier structure of the invention can be used in drying machine control system.For paper pulp system
The control system of the drying machine included during making includes such drier structure and for detecting/estimating/calculating at least one
The device of individual variable, the variable is directly related with the level of production of the pulp making process in drier structure.Based on the change
Measure to control the device for air to be discharged from discharge part.
Such control can discharge these discharge air from discharge part, thus to drying machine partial boost, and
In specific embodiment, or even whole building thing is pressurized.When in the state in supercharging, building supply air can be via
Conduit and/or opening guiding.Do not condense between floors.
In the controls, the device for supplying air to base section can be controlled so that supply air is protected
Hold in desired value.
Therefore, quantity can be controlled for example based on the pressure in discharge part.
Control system may also include：The pressure sensor in drier structure is arranged on, pressure sensor detection conduct
Pressure in the drier structure of variable；And/or it is arranged on the temperature sensor in drier structure, temperature sensor detection
As the temperature in the drier structure of variable.
In the controls, in addition to for the device for supplying air to drier structure, base section does not include using
In the extra device of supply cooling air.
Therefore, it is the air supply (example for entering base section to introduce air into the only feeder in drying machine
Such as fan), the air supply can be arranged in the upstream of base section, base section or bottom along air supply direction
Partial downstream.If base section air supply is arranged on the upstream of base section, it can be by blow air to bottom
In part.If base section air supply is arranged in base section, it can draw air into and be blown into base portion
In point.If base section air supply is arranged on the downstream of bottom, it can be drawn air into base section.
In the controls, for supplying air to the device of base section, for air to be discharged from discharge part
Device and the feeder for air to be fed into discharge part from base section can be respectively fan or fan group.
And, control system may also include one or more speed controls of the speed, temperature and/or pressure that are respectively used to control air-flow
Device, one or more temperature controllers and one or more pressure controllers.
The control method of the air-cushion type drying machine for being included in pulp making process is comprised the following steps：Detection/estimate/
Calculate at least one variable, the direct phase of the level of production of the pulp making process in the variable and drier structure of the invention
Close；Supply air to bottom；And air is discharged from discharge part, wherein being controlled air from base portion based on the variable
Divide and be fed to discharge part.
In the drying machine of prior art, discharge air is conditioned by measuring discharge stream and air water content.Two kinds
Measurement is all unreliable and is difficult to put into practice.Supply air is not conditioned at all.The method of the present invention and structure solve the two and ask
Topic, and contribute to energy-conservation and the more preferable maneuverability of web.
In the method for the invention, productivity ratio requirement higher steam pressure higher, this causes discharge air higher
Temperature.Productivity ratio higher substantially also means water content higher in evaporation and discharge air higher.According to the present invention,
Discharge air-flow is based on the variable directly related with the level of production of drying machine, such as discharges the temperature of air, is conditioned.The measurement was both
It is easily and reliable, and discharge the humidity of air and will remain in optimum level.Supply air flow is by measuring the top portion of drying machine
Point in air pressure and be conditioned.For the floatability for maintaining web good in the upper part of drying machine, supply air is excellent
Change to maintain desired air cushion pressure.This will improve performability, and reduce the generation of web break and dust.By optimization
Discharge and supply air flow, energy consumption are lowered.
In the method, supply air to drier structure to be controlled so that supply air is maintained at expectation
Value.
Regulation pulp dryer supply air flow so that the air pressure in pulp dryer is maintained at desired value.Pulp dryer
Discharge air be based on temperature survey and/or its dependent variable and adjust, the increase of these variables improve the level of production (for example, speed,
Steam pressure, the level of production for calculating).In the method, the variable can be the level of production in pulp making process part
In pressure and/or temperature.In the method, the cooling air from base section can be supplied to dry as supply air
Dry machine structure.
The method may also include speed, temperature and/or the pressure of control air-flow.
The pressure condition of dryer inner has a direct impact to web running ability, especially in air-cushion type pulp dryer
The drying layer on the top of (airborne pulp dryer).For example with very low pressure by web towards top jet nozzle lifting,
Mean that unstable web is run and forms dust.Correct pressure condition as carried out by control in the method for the invention
Air balance processed and keep (air supply of drying machine is namely controlled based on the pressure and/or temperature in drying section).Profit
Controlled with this correct air balance, obtained：
The web running ability stabilization of the drying layer on top.
Dust forms and reduces and avoid web break.
Make leakage current minimum, which save heat energy.
Air humidity higher reduces the electric energy consumption of drying machine.
The heat recovery efficiency of the air-flow after balance is more preferable.
Afterbody traction is safer.
Maintenance is minimized using reliable measurement.
Brief description of the drawings
Fig. 1 shows the drying machine and building air-flow according to prior art；
Fig. 2 shows another drying machine and building air-flow according to prior art；
Fig. 3 shows the drying machine and building air-flow of first embodiment of the invention；
Fig. 4 shows drying machine and building air-flow according to the second embodiment of the present invention；
Fig. 5 shows the schematic diagram of drying machine of the invention and air-flow；
Fig. 6 to Fig. 9 shows in some examples and drying machine of the invention compared with prior art and air-flow side
View.
Wherein, description of reference numerals is as follows
Reference table
10 buildings
21 top discharge parts
The drying machine major part at 22 centers
The cooling end of 23 bottoms
The supply department of 24 transformations
31 ventilating fans
32 fans
33rd, 34 cooling end fan
Heat recovery system in 40 present invention
100 buildings
121 top discharge parts
122 drying machine major parts
The cooling end of 123 bottoms
124 supply departments
211 false tops
212 pressure sensors
221 separators
222 temperature sensors
131 heat recovery systems of the prior art
132nd, 133,139 air-flow of the prior art
PIC pressure controllers
SIC speed controls
TIC temperature controllers
Specific embodiment
Hereinafter, the present invention will be explained in greater detail with reference to some embodiments.
Embodiment 1
Fig. 3 shows the drying machine and building air-flow of first embodiment of the invention.
Building 10 is included and is made up of the order according to bottom 23, drying machine major part 22 and top discharge part 21
Drying machine portion.In other words, drying machine major part 22 is sandwiched between top discharge part 21 and bottom 23.Drying machine portion quilt
It is designed as the entirety shown in shade in Fig. 3.The entirety is arranged on the floor/ground of building 10, as shown in Figure 3, is made
Obtain side wall and roof the side wall and roof away from the object of building 10.
Cooling end is played a part of in bottom 23, and the cooling end has the cooling end fan of integration, for by cooling air
Cooling end 23 is fed to, and cooling air is left cooling end.Therefore, drying machine major part 22 is close to cooling end 23.
In the present invention, cooling air is fed to drying machine major part 22 by cooling end fan from cooling end 23, to perform pulp web
Drying, and cooling air is fed to top discharge part 21 from drying machine major part 22.Discharge air is arranged from top
Go out the outside that part 21 is discharged to building 10.
In drying machine major part 22, complete web and dry.With it is similar in the prior art, such as pulp web wet web
In reaching and being supplied from above drying machine major part 22.In contactless drying, web is in drying machine major part
22 inside is advanced, and is moved to bottom from the high-order of drying machine major part 22 in the way of complications, and main from drying machine
Leave the bottom of part 22.
In this first embodiment, cooling end 23 receives the cooling air from building 10.
Air in building 10 is introduced cooling end 23 by drying machine using the cooling end fan 33 of integration.Cooling
Portion's fan 33 itself can be arranged in building 10 or in cooling end 23.Therefore, in the drying machine of first embodiment, under
The cooling air of the cooling end 23 in portion serves as the supply air of drying machine.
Drying machine is operated using building air, and so-called building discharges air from building 10 via cooling end 23
Enter into drying machine major part 22.
Building 10 is introduced into supply air by the opening in building wall or by the fan at building wall.
Based on the reason, one or several fans 32 are arranged to for air to be transported to the main portion of drying machine from cooling end 23
Divide 22, and be further conveyed to top discharge part 21.Discharge air is by one or several fans from top discharge part
21 outsides for being discharged to building 10.
Discharge air can be discharged to heat recovery system 40.Heat in heat recovery system 40 can for example be used to add
Hot water.Therefore, improved Air-Water recuperation of heat is reached.
The effect of embodiment
Cooling air is simultaneously supplied to the inside of building 10 not as shown in the prior art of Fig. 1, but is supplied
To drying machine major part 22.Therefore, in the drying machine of first embodiment, cooling air does not increase the heat in building 10
Amount and humidity load.
According to first embodiment, it is not necessary to supply the intermediate floor of air, and individually supply air fan or pipeline
Nor required.In other words, without supply department of the prior art as discussed above.
In the first embodiment, the control to fan/fans group can be operated via one or several different controllers.
And, in the first embodiment, cooling air fan 33 can be integrated with drying machine construction, and drying machine is constructed in cooling end 23
Or the position between cooling end 23 and the outer wall of building 10 is located in building 10, or cooling air fan 33 can be set
In the outside of building 10.Each air-flow (supply, discharge, cooling) can be realized using each of one or several fans.
By the present invention, can realize that drying machine updates and be transformed with existing drying machine so that in the main portion of drying machine
The existing supply air portion divided below 22 can be converted into active drying section.
In the present invention, all air for being needed in the drying process of drying machine major part 22 are from cooling end 23 as cold
But air is introduced in drying machine major part 22.
Embodiment 2
Fig. 4 shows drying machine and building air-flow according to the second embodiment of the present invention.
Second embodiment is similar to first embodiment.Hereinafter, the difference with first embodiment is only discussed.
In the first embodiment of the present invention, as shown in figure 1, drying machine using the cooling end fan 33 of integration will build
The air in thing 10 is built to be incorporated into cooling end 23.
In the second embodiment of the present invention, as shown in Figure 2, drying machine is using cooling end fan 34 by outside building 10
Air be incorporated into cooling end 23.Cooling end fan 34 itself can be arranged on building 10 as outside cooling end fan
Outside.Alternatively, cooling end fan 34 can be arranged in cooling end 23, and via one or more pipes and building 10
External connection sucking extraneous air.
In a second embodiment, drying machine is not by building supply air but is operated by extraneous air.
Gas flow optimized
Fig. 5 shows the schematic diagram of drying machine of the invention and air-flow.The schematic diagram of Fig. 5 can be applied to first embodiment and
Second embodiment.
Fig. 5 shows the whole of the drying machine major part 22 of the cooling end 23, center of bottom and the discharge part 21 on top
Body.The cooling end 23 of bottom is arranged on overall floor, and including one or more cooling end fans 33.In the accompanying drawing
In example, four cooling end fans 33 are mounted with.The speed of cooling end fan 33 is controlled by speed control SIC.In accompanying drawing
In, cooling end fan 33 is divided into two groups, that is, by two coolings in the group on the left of the speed control SIC controls of left side
Portion's fan 33, and by two cooling end fans 33 in the group on the right side of the speed control SIC controls of right side.
The cooled portion's wind of air from (first embodiment) in building 10 or building 10 outer (second embodiment)
Fan 33 is sucked.
Separator 221 is set between the cooling end 23 of bottom and the drying machine major part 22 at center, from cooling end wind
The air-flow of fan 33 can be entered into drying machine major part 22 by the separator.Set in drying machine major part 22
Temperature sensor 222.Drying machine major part 22 includes so-called false top 211, its as by drying machine major part 22 with
The separator that top discharge part 21 separates.
Pressure sensor 212 is set in top discharge part 21.The air of top discharge part 21 is by the row of ventilating fan 31
Go out.In the example of hgure 5, two ventilating fans 31 are set in the outside of top discharge part 21, each ventilating fan 31 is on leaving
On the circuit of portion's discharge part 21.The speed of each ventilating fan 31 is controlled by respective specific speed controller SIC, that is,
The speed of left side ventilating fan 31 is controlled by left side speed control SIC, and the speed of right side ventilating fan 31 receives right side speed control
The control of device SIC processed.The speed control SIC of ventilating fan 31 performs its control based on temperature controller TIC, and by temperature
Sensor 222 provides temperature information for temperature controller TIC.
The speed control SIC of cooling end fan 33 performs its control based on pressure controller PIC, and is passed by pressure
Sensor 212 provides pressure information for pressure controller PIC.
Pressure sensor 212 and temperature sensor 222 separately detect the pressure and temperature in drier structure.Therefore, pass
Sensor 212 and/or 222 detects the variable directly related with the level of production of the pulp making process in drier structure.It is based on
Pressure and/or temperature in the variable, i.e. drier structure, control ventilating fan 31.
In a preferred control, cooling end fan 33 is controlled so that is introduced in cooling end 23 and is delivered to
The air of the drying machine major part 22 at center is maintained at desired value, that is, desired flow velocity.The speed of cooling end fan 33
Degree is controlled based on the pressure and/or temperature in drier structure.
In such control, pressure and/or temperature in drier structure are directly related with the level of production of paper pulp
Variable, this is the output due to drying machine portion depending on the pressure and/or temperature in drier structure.In the control, base
Pressure and/or temperature in drier structure, air are supplied to base section 23, and discharge unit is fed to from base section 23
Divide 21, and discharged from discharge part 21.
Therefore, control air supply is fed to base section 23 to drier structure so that the speed quilt of supply air
It is maintained at desired value.
Fig. 6 to Fig. 9 shows in some examples and drying machine of the invention compared with prior art and air-flow side
View.
Fig. 6 shows the side view of drying machine of the invention.
In figure 6, the cooling air of the inside from building 10 is supplied to cooling end 23.Cooling air is from cooling end
23 are fed to drying machine portion 22 itself, and are further supplied to discharge unit 21.The air of discharge unit 21 is discharged to building
Heat recovery tower 40 outside thing 10, in heat recovery tower 40, discharge air experience heat recycle process.
Fig. 7 is shown as the side view of the drying machine in the prior art of comparative example.
In the figure 7, the cooling air of the inside from building 100 is supplied to cooling end 123.Cooling air is from cooling
Portion 123 is supplied to building 100.Dry air is supplied to supply department 124, and is fed to drying machine from supply department 124
Portion 122 itself, and further it is supplied to discharge part 121.The air of discharge part 121 be discharged to building 100 it
Outer heat recovery tower 131, in heat recovery tower 131, discharge air experience heat recycle process.The heat energy of recovery is used to heat conduct
Dry air is supplied to the air of supply department 124.
In the comparative example of Fig. 7 of the prior art of such as Fig. 1 and Fig. 2, the cooling air increase of cooling end 123 is left
Heat and humidity load in building.
In the comparative example, using fan and conduit, make the supply air from heat reclamation device 131 in drying machine portion
Guided below 122.Discharge air is suctioned out and via heat reclamation device 131 from the discharge part 121 at the top of drying machine
It is directed away.
Fig. 8 shows the side view of another drying machine of the invention.
In fig. 8, the cooling air of the outside from building 10 is supplied to cooling end 23.Cooling air is from cooling end
23 are supplied to drying machine portion 22, and are further supplied to discharge part 21.The air of discharge part 21 is discharged to be built
The heat recovery tower 40 outside thing 10 is built, in heat recovery tower 40, discharge air experience heat recycle process.
Fig. 9 shows the side view of another drying machine of the invention.
In fig .9, the drying machine of prior art is transformed using principle of the invention, such as it is dry in the comparative example of Fig. 7
Dry machine.Cooling end 23 is supplied to from the cooling air inside or outside building 10.The former supply department is converted into
Drying machine portion part 24 in itself, and constitute the low portion in drying machine portion 22.Free space in the supply department 24 of transformation
The dry nozzle with the upper part same type in drying machine portion 22 (namely main drying machine portion 22) is nowadays equipped with, so as to carry
Drying capacity high.
Dry air is supplied to the supply department 24 of transformation from the cooling end 23 in drying machine portion.Confession of the dry air from transformation
Answer portion 24 to be supplied to main drying machine portion 22, and be further supplied to discharge part 21.
The air of discharge part 21 is discharged to the heat recovery tower 40 outside building 10, in heat recovery tower 40, discharge
Air experiences heat recycle process.
The heat energy of recovery is used to heat such as water.Therefore, the Air-Water being similarly modified in the embodiment with Fig. 3 is obtained
Heat reclamation device.
Alternative
In embodiment more than, the drier structure for drying pulp web is discussed.Same principle can be used in
In drying the drier structure of paper web or board web.
And, in the embodiment above, at least one variable directly related with the level of production in pulp making process
Detected by one or more sensors.In the selection for substituting, it is not necessary to detect the variable, but can estimate or calculate this
Variable.
In embodiment, the improved drier structure for pulp making process is explained.However, drier structure is also
Can be used for paper manufacturing process or cardboard making process.
Claims (17)
1. the drier structure of pulp making process is used for, including：
Compact air-cushion type drying machine unit, is made up of following part：
The discharge part (21) of integration, in a side of the air-cushion type drying machine unit,
Air-cushion type drying machine part (22), is disposed adjacent to the discharge part, and
Bottom cooling end (23), in the side relative with the discharge part of the integration of the air-cushion type drying machine unit；
Device (33,34) for supplying air to the bottom cooling end (23)；And
For the device (31) that air is discharged from the discharge part (21)；
Characterized in that,
Wherein web is supplied from above in the air-cushion type drying machine part (22), and in contactless drying, web is in institute
The inside for stating air-cushion type drying machine part (22) is advanced, from a high position for the air-cushion type drying machine part (22) in the way of complications
Moved to bottom, wherein the air-cushion type drying machine part (22) is provided with desired air cushion pressure, to maintain the floating of web
Property, web is left from the bottom of the air-cushion type drying machine part (22)；
The bottom cooling end (23) is disposed adjacent to the air-cushion type drying machine part (22)；
The discharge part (21) is arranged on the top side of the air-cushion type drying machine unit, and
The bottom cooling end (23) is arranged on the bottom side of the air-cushion type drying machine unit, and be set to will be under described
The cooling air of portion's cooling end (23) direct supplies to the drying machine part (22).
2. drier structure according to claim 1, wherein
The drier structure is included for air to be fed into the discharge part (21) from the bottom cooling end (23)
Feeder (32).
3. drier structure according to claim 2, wherein
The feeder (32) quilt for air to be fed to the discharge part (21) from the bottom cooling end (23)
Be set to, can from the bottom cooling end (23) be supplied as the air-cushion type drying machine part (22) supply air it is cold
But air.
4. the drier structure according to any one in Claim 1-3, wherein
It is described to be arranged to for supplying air to the device (33) of the bottom cooling end (23) so that the bottom cooling
Inside of the air in portion (23) from building (10).
5. the drier structure according to any one in Claim 1-3, wherein
It is described to be arranged to for supplying air to the device (34) of the bottom cooling end (23) so that the bottom cooling
Outside of the air in portion (23) from building (10).
6. the drier structure according to any one in Claim 1-3, wherein
The drier structure is configured to so that using only in the bottom cooling end (23) in the drier structure
Air.
7. the control system of drying machine included in pulp making process is used for, including：
Drier structure according to any one in claim 1 to 6, and
Device (212,222), for detecting/estimating/calculating the production water with the pulp making process in the drier structure
Flat at least one directly related variable,
Wherein
The device (31) for air to be discharged from the discharge part (21) can be controlled based on the variable.
8. control system according to claim 7, wherein
The device (33,34) for supplying air to the bottom cooling end (23) can be controlled so that supply air
It is maintained at desired value.
9. control system according to claim 7, wherein
The variable is pressure and/or temperature in the level of production of pulp making process part, and
The control system also includes：
Pressure sensor (212), is arranged in the drier structure, and the pressure sensor is detected as the institute of the variable
State the pressure in drier structure；And/or
Temperature sensor (222), is arranged in the drier structure, and the temperature sensor is detected as the institute of the variable
State the temperature in drier structure.
10. control system according to claim 8, wherein
The variable is pressure and/or temperature in the level of production of pulp making process part, and
The control system also includes：
Pressure sensor (212), is arranged in the drier structure, and the pressure sensor is detected as the institute of the variable
State the pressure in drier structure；And/or
Temperature sensor (222), is arranged in the drier structure, and the temperature sensor is detected as the institute of the variable
State the temperature in drier structure.
11. control system according to any one in claim 7 to 10, wherein
In addition to for the device for supplying air to the drier structure, the bottom cooling end (23) is not included for supplying
The extra device of cooling air.
12. control system according to any one in claim 7 to 10, wherein
The device (33,34) for supplying air to the bottom cooling end (23), it is described for by air from described
The device (31) and described for air to be fed into the row from the bottom cooling end (23) of discharge part (21) discharge
The feeder (32) for going out part (21) is respectively fan or fan group, and
The control system also includes one or more speed controls of the speed, temperature and/or pressure that are respectively used to control air-flow
Device processed, one or more temperature controllers and one or more pressure controllers.
The control method of air-cushion type drying machine, comprises the following steps in 13. pulp making process：
Detection/estimate/calculate at least one variable, the variable and the drying according to any one in claim 1 to 6
The level of production of the pulp making process in machine structure is directly related,
The bottom cooling end (23) is supplied air to, and
Air is discharged from the discharge part (21),
It is characterized in that
Air is fed to the discharge part (21) based on the variable to be controlled from the bottom cooling end (23).
14. methods according to claim 13, wherein
Supply air to the drier structure to be controlled as so that supply air is maintained at desired value, and/or
The variable is pressure and/or temperature in the level of production of pulp making process part.
15. methods according to claim 13, wherein
Cooling air from the bottom cooling end (23) is supplied to the drier structure as the supply air.
16. methods according to claim 14, wherein
Cooling air from the bottom cooling end (23) is supplied to the drier structure as the supply air.
17. method according to any one in claim 13 to 16, wherein
The method also includes speed, temperature and/or the pressure of control air-flow.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13176610.7 | 2013-07-16 | ||
| EP13176610.7A EP2826916B1 (en) | 2013-07-16 | 2013-07-16 | Dryer structure for a pulp making process, control system for a dryer and method for a dryer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104294697A CN104294697A (en) | 2015-01-21 |
| CN104294697B true CN104294697B (en) | 2017-07-04 |
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| CN201410306412.8A Active CN104294697B (en) | 2013-07-16 | 2014-06-30 | The drier structure of pulp making process and the control system of drying machine and method |
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| EP (1) | EP2826916B1 (en) |
| CN (1) | CN104294697B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3733964A1 (en) * | 2019-04-29 | 2020-11-04 | Valmet Technologies Oy | Arrangement and method for a pulp dryer |
| EP3736375B1 (en) * | 2019-05-06 | 2023-10-25 | Valmet Technologies Oy | Method and arrangement for controlling energy consumption in a manufacturing process of a fibrous web |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2460042A (en) * | 1945-01-13 | 1949-01-25 | Rice Barton Corp | Method of making cockle paper |
| FI46644B (en) * | 1967-11-10 | 1973-01-31 | Valmet Oy | |
| SE450776B (en) * | 1983-05-19 | 1987-07-27 | Asea Ab | Humidity control for pulp suspension |
| JP2909285B2 (en) * | 1991-12-03 | 1999-06-23 | 三菱重工業株式会社 | Paper machine dryer |
| FI108871B (en) * | 1998-07-06 | 2002-04-15 | Metso Paper Inc | A method and apparatus for drying a coated web |
| FI20000387A0 (en) * | 2000-02-21 | 2000-02-21 | Valmet Corp | Method and apparatus for arranging the discharge and supply of air in the dryer section |
| JP5266588B2 (en) * | 2009-04-07 | 2013-08-21 | デュプロ精工株式会社 | Recycled pulp manufacturing apparatus, used paper processing apparatus, and used paper processing method |
| CN101929095A (en) * | 2009-06-25 | 2010-12-29 | 铨展环能设备(昆山)有限公司 | Air supplying and exhausting system for dryer hood of paper machine |
| CN101838952B (en) * | 2010-05-12 | 2011-11-16 | 陕西福辰环保科技有限公司 | Biogas hot-air paper board drying system |
| CN201850466U (en) * | 2010-10-29 | 2011-06-01 | 江苏理文造纸有限公司 | Drying chamber |
-
2013
- 2013-07-16 EP EP13176610.7A patent/EP2826916B1/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104294697A (en) | 2015-01-21 |
| EP2826916B1 (en) | 2017-08-30 |
| EP2826916A1 (en) | 2015-01-21 |
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