CN109682191B - Drying control method for multi-steam drying cylinder fabric - Google Patents
Drying control method for multi-steam drying cylinder fabric Download PDFInfo
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- CN109682191B CN109682191B CN201910086109.4A CN201910086109A CN109682191B CN 109682191 B CN109682191 B CN 109682191B CN 201910086109 A CN201910086109 A CN 201910086109A CN 109682191 B CN109682191 B CN 109682191B
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- 238000001035 drying Methods 0.000 title claims abstract description 171
- 239000004744 fabric Substances 0.000 title claims abstract description 160
- 238000000034 method Methods 0.000 title claims abstract description 69
- 230000008569 process Effects 0.000 claims abstract description 49
- 238000001514 detection method Methods 0.000 abstract description 14
- 230000007246 mechanism Effects 0.000 abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 22
- 238000004043 dyeing Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007730 finishing process Methods 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- WNEODWDFDXWOLU-QHCPKHFHSA-N 3-[3-(hydroxymethyl)-4-[1-methyl-5-[[5-[(2s)-2-methyl-4-(oxetan-3-yl)piperazin-1-yl]pyridin-2-yl]amino]-6-oxopyridin-3-yl]pyridin-2-yl]-7,7-dimethyl-1,2,6,8-tetrahydrocyclopenta[3,4]pyrrolo[3,5-b]pyrazin-4-one Chemical compound C([C@@H](N(CC1)C=2C=NC(NC=3C(N(C)C=C(C=3)C=3C(=C(N4C(C5=CC=6CC(C)(C)CC=6N5CC4)=O)N=CC=3)CO)=O)=CC=2)C)N1C1COC1 WNEODWDFDXWOLU-QHCPKHFHSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005517 mercerization Methods 0.000 description 1
- 230000001007 puffing effect Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
- F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
- F26B13/18—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning heated or cooled, e.g. from inside, the material being dried on the outside surface by conduction
- F26B13/183—Arrangements for heating, cooling, condensate removal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/18—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
- F26B3/20—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source being a heated surface, e.g. a moving belt or conveyor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sustainable Development (AREA)
- Microbiology (AREA)
- Textile Engineering (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a multi-steam drying cylinder fabric drying control method and a device, wherein the multi-steam drying cylinder fabric drying control device comprises at least 8 steam drying cylinders, steam branch pipes communicated with the steam drying cylinders, a steam main pipe communicated with the steam branch pipes and an electric controller, each steam branch pipe or at least 4 steam branch pipes are respectively provided with a control valve with an on-off function, the control valves are controlled by the electric controller, a fabric moisture content or cloth cover temperature or steam drying cylinder temperature detection mechanism is arranged at the steam drying cylinders, and the fabric moisture content or cloth cover temperature or steam drying cylinder temperature detection mechanism is connected with the electric controller. The fabric moisture content detection mechanism is preferably a moisture sensor. The cloth cover temperature or steam drying cylinder temperature detection mechanism is preferably a temperature sensor. The invention can ensure the steam inlet pressure and timely drainage of the steam drying cylinder, reduce the steam consumption, improve the drying efficiency, prevent the dead weight of the steam drying cylinder from increasing and ensure that the dried fabric meets the process requirement.
Description
Technical Field
The invention relates to a drying control method and a drying control device for multi-steam drying cylinder fabrics, belonging to the technical field of textile dyeing and finishing processes and equipment.
Background
The textile printing and dyeing enterprises use steam drying cylinder drying equipment to heat and dry the water-bearing fabric, the steam drying cylinder drying equipment usually comprises at least 8 steam drying cylinders to form a column drying unit, and more than one column drying units are generally adopted to dry the water-bearing fabric, so that the dried fabric meets the process requirements.
When the steam drying equipment works, each steam drying cylinder introduces the steam in the main steam pipe into the steam drying cylinder through the corresponding steam branch pipe to heat the steam drying cylinder, and meanwhile, the steam with certain pressure can push the condensed water formed by heat exchange between the steam drying cylinder and the fabric to be discharged outwards through the siphon pipe, the drain valve and the water collecting pipe, so that the aim of timely draining is achieved. The heating efficiency of the steam drying cylinder can be improved by timely dewatering, the steam consumption is reduced, and the production operation cost is reduced; in addition, timely drainage can prevent condensation water in the steam drying cylinder from forming a water hammer, so that abrasion of a pipe wall, a valve and a connecting piece is reduced, the self weight of the steam drying cylinder can be prevented from being increased, and potential safety hazards are avoided when the steam drying cylinder rotates at a high speed.
At present, the fabric drying control of each column drying unit is to add a steam controlled proportion regulating valve to the column steam main pipe, and to implement PID regulation control to the opening of the steam main pipe controlled proportion regulating valve according to the detection of the water content of the fabric at the drying end. The drying cylinder is a large inertia time lag system, and the proportional control valve is adopted to implement PID control and the conventional differential advance control method has quite unsatisfactory effects: on one hand, the requirements of different temperature deviations and deviation change rates cannot be met, dynamic control is unstable, and the fluctuation of the water content of the fabric is large; the steady-state control deviation is large, and the control and adjustment time is long. Moreover, when the controlled proportional control valve is in a middle-small opening state, the pressure of steam entering the steam drying cylinder is too small, so that condensed water is far insufficient to be pushed to be discharged outwards through the drain valve, and serious ponding in the inner cavity of the steam drying cylinder causes a plurality of defects:
① More condensed water is accumulated, the steam drying cylinder obviously shows dynamic balance unbalance, the fabric is easy to wrinkle on the steam drying cylinder, large-area defective cloth appears, and the normal operation of the subsequent finishing process is seriously influenced;
② The heat exchange area is greatly reduced due to the serious ponding in the inner cavity of the steam drying cylinder, the production process temperature which can be achieved by the steam drying cylinder is reduced, the production speed is low, the production efficiency is low, and meanwhile, the product quality is influenced;
③ More condensed water is accumulated, so that a water hammer is formed to aggravate abrasion of pipe walls, valves and connectors, the maintenance workload is large, and the cost is high; the dead weight of the steam drying cylinder is increased, and potential safety hazards are generated when the steam drying cylinder rotates;
on the other hand, in the continuous production and replacement process, the slow response of the drying time delay system of the drying cylinder and PID regulation control causes that the dried fabric does not meet the process requirements, the quality of the drying cropping cannot be ensured, and the productivity is affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the multi-steam drying cylinder fabric drying control method which can reliably ensure the steam inlet pressure and timely drainage of the steam drying cylinder, reduce the steam consumption, improve the drying efficiency, prevent the dead weight of the steam drying cylinder from increasing and ensure that the drying fabric meets the process requirements. Meanwhile, the invention also provides a drying control device for the multi-steam drying cylinder fabric.
In order to solve the technical problems, the invention adopts a multi-steam drying cylinder fabric drying control method, wherein the multi-steam drying cylinder comprises at least 8 steam drying cylinders, each steam drying cylinder introduces steam in a steam main pipe into the steam drying cylinder through a respective steam branch pipe, and the method comprises the following steps:
a. A control valve with an on-off function is respectively arranged on each steam branch pipe or at least 4 steam branch pipes, and the control valve is controlled by an electric controller;
b. operating the steam drying cylinder drying equipment, wherein the electric controller opens the control valve, and steam enters the steam drying cylinder to heat the steam drying cylinder;
c. The electric controller collects the moisture content of the drying fabric or the cloth cover temperature or the steam drying cylinder temperature, compares the moisture content of the drying fabric or the cloth cover temperature or the steam drying cylinder temperature with the moisture content range or the cloth cover temperature range or the steam drying cylinder temperature range required by the fabric process, and closes at least one control valve when the moisture content of the drying fabric is smaller than the lower limit of the moisture content range required by the process or the cloth cover temperature, the steam drying cylinder temperature is larger than the cloth cover temperature range required by the process or the upper limit of the steam drying cylinder temperature range,
C1, if the moisture content of the dried fabric is still smaller than the lower limit of the moisture content range required by the process or the cloth cover temperature, and the steam drying cylinder temperature is still larger than the upper limit of the cloth cover temperature range required by the process or the steam drying cylinder temperature range, the electric controller continuously closes at least one control valve and repeats the steps until the moisture content of the dried fabric or the cloth cover temperature or the steam drying cylinder temperature is within the moisture content range required by the process or the cloth cover temperature range or the steam drying cylinder temperature range;
And c2, if the moisture content of the dried fabric is larger than the upper limit of the moisture content range required by the process or the cloth cover temperature, and the steam drying cylinder temperature is smaller than the cloth cover temperature range required by the process or the lower limit of the steam drying cylinder temperature range, the electric controller opens at least one control valve and repeats the steps until the moisture content of the dried fabric or the cloth cover temperature or the steam drying cylinder temperature is within the moisture content range required by the process or the cloth cover temperature range or the steam drying cylinder temperature range.
As a preferred embodiment of the above method, in step c, the electric controller closes one or both of the two or three control valves; in step c1, the electrical controller continues to close one or both of the two or three control valves.
As a preferred embodiment of the above method, in step c2, the electric controller opens one or both of the two or three control valves.
In order to solve the technical problems, the invention adopts the multi-steam drying cylinder fabric drying control device which comprises at least 8 steam drying cylinders, steam branch pipes communicated with each steam drying cylinder, a steam main pipe communicated with each steam branch pipe and an electric controller, wherein each steam branch pipe or at least 4 steam branch pipes are respectively provided with a control valve with an on-off function, the control valve is controlled by the electric controller, a fabric moisture content or cloth temperature or steam drying cylinder temperature detection mechanism is arranged at each steam drying cylinder, and the fabric moisture content or cloth temperature or steam drying cylinder temperature detection mechanism is connected with the electric controller.
As a preferred embodiment of the present invention, the fabric moisture content detecting mechanism is a moisture sensor, and the moisture sensor is connected to the electric controller.
As a preferred embodiment of the present invention, the cloth cover temperature or steam drying cylinder temperature detecting mechanism is a temperature sensor, and the temperature sensor is connected with the electric controller.
As a preferred embodiment of the present invention, the electric controller is a digital controller having a human-machine interface or an embedded system or an industrial personal computer.
After the fabric drying control method and the device are adopted, the invention has the following beneficial effects:
The invention can ensure that the moisture content of the fabric is accurate and stable, meets the process requirement, thoroughly solves the great problem of large fluctuation of the moisture content of the fabric caused by adopting a proportional control valve in the printing and dyeing industry for decades, ensures that the accurate and stable moisture content can ensure that mercerization process fibers have good and uniform puffing characteristics, and is beneficial to dye absorption and dye saving; the method provides guarantee for post-finishing such as dyeing uniformity, dyeing fastness and the like of the fabric in the dyeing and printing process. The invention greatly improves the quality of the dried fabric product.
The invention can reliably ensure the steam pressure entering the steam drying cylinder, and is sufficient for pushing condensed water to pass through the siphon pipe and the drainage device to drain water in time. The invention solves the problems that when the proportional regulating valve adopted in the prior art is in a middle and small opening state, the steam pressure entering the drying cylinder is too small, so that condensed water is not sufficiently pushed to be discharged outwards in time, and serious water accumulation exists in the inner cavity of the drying cylinder.
The invention has the advantages of high response speed of drying by controlling the drying cylinder, ensured quality of the dried fabric, and overcomes the defects that the response speed of drying by controlling the drying cylinder by adopting PID regulation is low and the quality of the dried fabric cannot be ensured in the prior art.
The invention can effectively prevent the destructive influence of the water hammer phenomenon of the steam drying cylinder on equipment, greatly reduce the steam consumption, improve the drying efficiency and ensure that the dried fabric meets the process requirement.
Drawings
The following describes the embodiments of the present invention in further detail with reference to the drawings.
Fig. 1 is a schematic view of a structure of a multi-steam cylinder fabric drying control apparatus according to the present invention.
Fig. 2 is an enlarged schematic view at a in fig. 1.
Detailed Description
In order to ensure the steam inlet pressure and timely drainage of the steam drying cylinders and ensure that the dried fabric meets the process requirements, the invention adopts a multi-steam drying cylinder fabric drying control method, and referring to figures 1 and 2, the multi-steam drying cylinder comprises at least 8 steam drying cylinders 1, for example 8-12, each steam drying cylinder 1 introduces steam 7 in a steam header pipe 4 into the steam drying cylinder 1 through a respective steam branch pipe 1-1, and the method comprises the following steps:
a. a control valve 2 with on-off function, such as a cut-off valve, etc., is respectively arranged on each steam branch pipe 1-1 or at least 4 steam branch pipes 1-1, and the control valve 2 is controlled by an electric controller 3;
b. operating the steam drying cylinder drying equipment, wherein the electric controller 3 opens the control valve 2, and steam 7 enters the steam drying cylinder 1 to heat the steam drying cylinder and simultaneously heat the fabric 8; in this step, the electric controller 3 preferably opens all control valves 2, but it is of course also possible to open some control valves 2, for example 7 or 6 control valves 2 etc.,
C. The electric controller 3 collects the moisture content of the drying fabric or the cloth cover temperature or the steam drying cylinder temperature and compares the moisture content of the drying fabric or the cloth cover temperature or the steam drying cylinder temperature with the moisture content range or the cloth cover temperature range or the steam drying cylinder temperature range required by the fabric process, when the moisture content of the drying fabric is smaller than the lower limit of the moisture content range required by the process or the cloth cover temperature, the steam drying cylinder temperature is larger than the cloth cover temperature range required by the process or the upper limit of the steam drying cylinder temperature range, the electric controller 3 closes at least one control valve 2,
C1, if the moisture content of the dried fabric is still smaller than the lower limit of the moisture content range required by the process or the cloth cover temperature, and the steam drying cylinder temperature is still larger than the upper limit of the cloth cover temperature range required by the process or the steam drying cylinder temperature range, the electric controller 3 continuously closes at least one control valve 2 and repeats the steps until the moisture content of the dried fabric or the cloth cover temperature or the steam drying cylinder temperature is within the moisture content range required by the process or the cloth cover temperature range or the steam drying cylinder temperature range;
And c2, if the moisture content of the dried fabric is larger than the upper limit of the moisture content range required by the process or the cloth cover temperature, and the steam drying cylinder temperature is smaller than the cloth cover temperature range required by the process or the lower limit of the steam drying cylinder temperature range, the electric controller 3 opens at least one control valve 2 and repeats the steps until the moisture content of the dried fabric or the cloth cover temperature or the steam drying cylinder temperature is within the moisture content range required by the process or the cloth cover temperature range or the steam drying cylinder temperature range.
In step c of the present invention, the electric controller 3 preferably collects the moisture content or the cloth cover temperature or the steam drying cylinder temperature of the drying fabric at the last or last second steam drying cylinder 1 along the running direction of the fabric 8, but of course, may collect the moisture content or the cloth cover temperature or the steam drying cylinder temperature of the drying fabric at the middle steam drying cylinder 1 or other positions, and when the moisture content of the drying fabric is for example 3% or 4% or 4.5% or less than the lower limit 5.0% of the moisture content range required by the process, for example 5.0-5.8%, or the cloth cover temperature is for example 86 ℃ or 88 ℃, the steam drying cylinder temperature is for example 130 ℃ or 132 ℃ greater than the cloth cover temperature range required by the process, for example the upper limit 84 ℃ of 80-84 ℃, the steam drying cylinder temperature range is for example the upper limit 128 ℃ of 120-128 ℃, the electric controller 3 closes at least one control valve 2; in step c1, the electric controller 3 continues to collect or re-collect the moisture content or the cloth cover temperature or the steam cylinder temperature at intervals of, for example, 5-15 seconds, and compares the collected moisture content or cloth cover temperature or steam cylinder temperature with the moisture content range or cloth cover temperature range or steam cylinder temperature range required by the fabric process, if the moisture content of the dried fabric is still smaller than the lower limit of the moisture content range or cloth cover temperature required by the process, the steam cylinder temperature is still larger than the cloth cover temperature range required by the process, the upper limit of the steam cylinder temperature range, the electric controller 3 continues to close the at least one control valve 2, and repeats the steps until the moisture content or cloth cover temperature or steam cylinder temperature of the dried fabric is within the moisture content range or cloth cover temperature range or steam cylinder temperature range required by the process.
In step c2 of the present invention, the electric controller 3 continues to collect or re-collect the moisture content or the cloth cover temperature or the steam cylinder temperature at intervals of, for example, 5 to 15 seconds, and compares the collected moisture content or cloth cover temperature or steam cylinder temperature with the moisture content range or cloth cover temperature range or steam cylinder temperature range required by the fabric process, and if the moisture content of the drying fabric is, for example, 9% or 9.5% or 10% greater than the upper limit 5.8% of the moisture content range required by the process, for example, 5.0 to 5.8%, or the cloth cover temperature is, for example, 70 ℃ or 75 ℃, the steam cylinder temperature is, for example, 80 ℃ or 90 ℃ less than the cloth cover temperature range required by the process, for example, 80 ℃ or 80 ℃ lower limit of 80 ℃ or steam cylinder temperature range, for example, 120 ℃ to 128 ℃, the electric controller 3 opens at least one control valve 2 and repeats the steps until the moisture content or cloth cover temperature is within the moisture content range or cloth cover temperature range required by the process.
In the whole control process, the steam pressure in the steam drying cylinder 1 which is introduced with the steam 7 is always equal to the steam pressure of the steam main pipe 4, and the high-pressure steam 7 well and quickly pushes the condensed water 9 to be discharged outwards through the drain pipe 10, the drain valve 11 and the water collecting pipe 12, so that the drying efficiency is improved, and the safe production of equipment is ensured.
As a preferred embodiment of the above method, in step c, the electric controller 3 closes one or both of the two or three control valves 2; in step c1, the electric controller 3 continues to close one or both of the two or three control valves 2.
As a preferred embodiment of the above method, in step c2, the electric controller 3 opens one or both of the two or three control valves 2.
Referring to fig. 1 and 2, a multi-steam-drum fabric drying control device comprises at least 8 steam drums 1, for example, 8-12 steam branches 1-1 communicated with each steam drum 1, a steam header 4 communicated with each steam branch 1-1 and an electric controller 3, wherein a control valve 2 with on-off function, for example, a cut-off valve and the like, is respectively arranged on each steam branch 1-1 or at least 4 steam branches 1-1, the control valve 2 is controlled by the electric controller 3 preferably through a wired connection or a wireless signal, a fabric moisture content or cloth temperature or steam drum temperature detection mechanism is arranged at the steam drum 1, and in the invention, a fabric moisture content or cloth temperature or steam drum temperature detection mechanism is preferably arranged at the last or last steam drum 1 along the running direction of fabric 8, and of course, a fabric moisture content or cloth temperature or steam drum temperature detection mechanism is also arranged at the middle steam drum 1 and the like, and the fabric moisture content or cloth temperature detection mechanism is connected with the electric controller 3.
As a preferred embodiment of the present invention, the fabric moisture content detecting mechanism is a moisture sensor 5, the moisture sensor 5 is connected with the electric controller 3, and in operation, the moisture sensor 5 detects the fabric moisture content and transmits detection data to the electric controller 3. The moisture sensor 5 can be a non-contact radio frequency wave moisture sensor, can be used for carrying out nondestructive detection on the fabric 8, and is converted into the moisture content of the fabric by the electric controller 3; the moisture sensor 5 may be a contact moisture sensor, in which the fabric 8 passes between two mutually insulated fabric guide rollers 5a, and the change in resistance between the two fabric guide rollers 5a is detected and mapped to the moisture content of the fabric, which is converted into the moisture content of the fabric by the electric controller 3.
As a preferred embodiment of the present invention, the cloth cover temperature or steam drying cylinder temperature detecting mechanism is a temperature sensor 6, the temperature sensor 6 is connected with the electric controller 3, and in operation, the temperature sensor 6 detects the cloth cover temperature or steam drying cylinder temperature and transmits detection data to the electric controller 3.
In the present invention, the electric controller 3 is preferably a digital controller having a human-machine interface, such as a DDC digital controller or an embedded system or an industrial personal computer.
Through trial, the invention can reliably ensure the steam inlet pressure of the steam drying cylinder, timely discharge condensed water 9 formed by heat exchange between the steam drying cylinder 1 and the fabric 8 outwards through the drain pipe 10, the drain valve 11 and the water collecting pipe 12, achieve the aim of timely draining water, ensure that the dried fabric meets the process requirements, and has the advantages of less steam consumption, high drying efficiency and good effect.
Claims (3)
1. A multi-steam cylinder fabric drying control method, said multi-steam cylinder comprising at least 8 steam cylinders (1), each steam cylinder (1) introducing steam in a steam header (4) into the steam cylinder (1) through a respective steam branch (1-1), characterized in that the method comprises the steps of:
a. A control valve (2) with an on-off function is respectively arranged on each steam branch pipe (1-1), and the control valve (2) is controlled by an electric controller (3);
b. Operating the steam drying cylinder drying equipment, wherein the electric controller (3) opens the control valve (2), and steam enters the steam drying cylinder (1) to heat the steam drying cylinder;
c. The electric controller (3) collects the moisture content or the cloth cover temperature or the steam drying cylinder temperature of the drying fabric and compares the moisture content or the cloth cover temperature or the steam drying cylinder temperature with the moisture content range or the cloth cover temperature range or the steam drying cylinder temperature range required by the fabric process, when the moisture content of the drying fabric is smaller than the lower limit of the moisture content range required by the process or the cloth cover temperature, the steam drying cylinder temperature is larger than the cloth cover temperature range required by the process or the upper limit of the steam drying cylinder temperature range, the electric controller (3) closes at least one control valve (2),
C1, if the moisture content of the dried fabric is still smaller than the lower limit of the moisture content range required by the process or the cloth cover temperature, and the steam drying cylinder temperature is still larger than the upper limit of the cloth cover temperature range required by the process or the steam drying cylinder temperature range, the electric controller (3) continuously closes at least one control valve (2) and repeats the steps until the moisture content of the dried fabric or the cloth cover temperature or the steam drying cylinder temperature is within the moisture content range required by the process or the cloth cover temperature range or the steam drying cylinder temperature range;
And c2, if the moisture content of the dried fabric is larger than the upper limit of the moisture content range required by the process or the cloth cover temperature, the steam drying cylinder temperature is smaller than the cloth cover temperature range required by the process or the lower limit of the steam drying cylinder temperature range, the electric controller (3) opens at least one control valve (2) and repeats the steps until the moisture content of the dried fabric or the cloth cover temperature or the steam drying cylinder temperature is within the moisture content range required by the process or the cloth cover temperature range or the steam drying cylinder temperature range.
2. The multi-steam cylinder fabric drying control method of claim 1, wherein: in step c, the electric controller (3) closes one or both of the two or three control valves (2); in step c1, the electric controller (3) continues to close one or simultaneously two or three control valves (2).
3. The multi-steam cylinder fabric drying control method of claim 1, wherein: in step c2, the electric controller (3) opens one or both of the two or three control valves (2).
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| CN201910086109.4A CN109682191B (en) | 2019-01-29 | 2019-01-29 | Drying control method for multi-steam drying cylinder fabric |
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| CN202254721U (en) * | 2011-08-30 | 2012-05-30 | 江苏三房巷实业股份有限公司 | Automatic steam control system for printing and dyeing processing |
| CN105624954A (en) * | 2016-01-25 | 2016-06-01 | 广东溢达纺织有限公司 | System and method for automatically controlling moisture content of fabric |
| CN108589125A (en) * | 2018-06-06 | 2018-09-28 | 常州宏大智能装备产业发展研究院有限公司 | The intelligent electric-controlled trapping method of steam baking tube and device |
| CN209605547U (en) * | 2019-01-29 | 2019-11-08 | 常州宏大智能装备产业发展研究院有限公司 | Steaminess drying cylinder fabric drying control device |
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