CN117870340A - Air exhaust control method for drying room of fabric setting machine - Google Patents
Air exhaust control method for drying room of fabric setting machine Download PDFInfo
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- CN117870340A CN117870340A CN202311687443.8A CN202311687443A CN117870340A CN 117870340 A CN117870340 A CN 117870340A CN 202311687443 A CN202311687443 A CN 202311687443A CN 117870340 A CN117870340 A CN 117870340A
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- 238000001035 drying Methods 0.000 title claims abstract description 60
- 239000004744 fabric Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000001105 regulatory effect Effects 0.000 claims abstract description 80
- 238000007493 shaping process Methods 0.000 claims abstract description 18
- 239000013618 particulate matter Substances 0.000 claims description 31
- 239000002245 particle Substances 0.000 claims description 16
- 230000001276 controlling effect Effects 0.000 claims description 14
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 3
- 239000004753 textile Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 6
- 239000000779 smoke Substances 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 239000010812 mixed waste Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The invention relates to the textile field, in particular to an exhaust control method of a drying room of a fabric setting machine, wherein the drying room is provided with at least two sections of drying oven units which are sequentially communicated, and an exhaust system comprises an exhaust pipe and an exhaust fan; at least two sections of controlled oven units are arranged in all oven units, each controlled oven unit comprises an oven and an exhaust pipe communicated with the oven, an adjusting valve is arranged on the exhaust pipe of each section of controlled oven unit and is communicated with an exhaust pipe, and an exhaust fan is arranged on the exhaust pipe; the exhaust control method comprises the following steps: s1, setting humidity threshold intervals of all sections of controlled oven units; s2, enabling the exhaust fan to work at a preset frequency; s3, adjusting the opening of the corresponding regulating valve; s4, when the opening of the adjusting valve can not meet the adjusting requirement, the exhaust fan is adjusted. The invention adopts a mode of combining independent control and combined control, so that the humidity in each section of controlled oven unit meets the humidity threshold interval, the fabric shaping and drying effects are improved, and the energy consumption is reduced.
Description
Technical Field
The invention relates to the field of textiles, in particular to an exhaust control method for a drying room of a fabric setting machine.
Background
The drying room of the fabric setting machine comprises at least two sections of front-area drying rooms which are sequentially connected in series and are used for evaporating fabric moisture, and at least two sections of rear-area drying rooms which are sequentially connected in series and are used for evaporating fabric grease. In the previous area drying room example, a heat exchanger, a circulating fan, an upper air channel and a lower air channel are arranged in the drying room, hot air exhausted by nozzles of the upper air channel and the lower air channel heats liquid-carrying fabrics positioned between the upper air channel and the lower air channel, and drying, tentering and shaping are realized. After the high-speed hot air sprayed out of the upper air channel and the lower air channel of the single-section drying room completes the heating of the fabric, the flow direction of the hot air is as follows: part of the hot and humid air is discharged outside through the control of the exhaust pipe of the drying room of the present section, part of the hot and humid air enters the heat exchanger again to be heated and circulated continuously, and the other part of the hot and humid air enters the drying room of the next section through the communication port of the drying room of the present section and the drying room of the next section.
After the fabric with liquid enters a drying room of the setting machine, the fabric is continuously heated and warmed, moisture contained in the fabric is continuously vaporized, the fabric is separated into water vapor, the evaporation capacity of the fabric moisture in each drying room is different, the air humidity of the drying room is also different, the air pressure difference between each drying room is provided, the drying rooms are communicated, the instantaneous air flow direction, the air flow intensity and the space distribution of the air flow field of each drying room are always changed, and the air flow directions, the air flow intensity and the space distribution of each drying room are mutually influenced and mutually disturbed.
Therefore, a method for controlling the exhaust air of the drying room of the fabric setting machine is designed according to the characteristics of the drying room of the fabric setting machine, so that the drying effect is improved, and the energy consumption is saved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an exhaust control method for a drying room of a fabric shaping machine, which adopts a mode of independent control and combined control to ensure that the humidity in each section of controlled oven unit meets a humidity threshold interval, thereby improving the shaping and drying effects of the fabric and reducing the energy consumption.
In order to solve the technical problems, the technical scheme of the invention is as follows: the air exhaust control method of the drying room of the fabric setting machine is carried out based on an air exhaust system, wherein the air exhaust system comprises an air exhaust pipe and an air exhaust fan; at least two sections of oven units are controlled oven units, each controlled oven unit comprises an oven and an exhaust pipe communicated with the oven, an adjusting valve is arranged on the exhaust pipe of each section of controlled oven unit and is communicated with the exhaust pipe, and the exhaust fan is configured on the exhaust pipe and is used for providing exhaust power;
the exhaust control method comprises the following steps:
s1, setting humidity threshold intervals of all sections of controlled oven units;
s2, enabling the exhaust fan to work at a preset frequency;
s3, adjusting the opening of the corresponding adjusting valve according to the detected relation between the current humidity of each section of controlled oven unit and the corresponding humidity threshold interval;
s4, when the regulating valve of the controlled oven unit is regulated to a preset maximum opening or a preset minimum opening, and the current humidity still does not meet the corresponding humidity threshold interval:
firstly, internal adjustment is carried out, and if the internal adjustment cannot enable the current humidity of all the controlled oven units to meet the corresponding humidity threshold interval, the operation frequency of the air-saving fan is adjusted; or directly adjusting the running frequency of the exhaust fan;
after the operation frequency of the exhaust fan is adjusted, judging whether the current humidity of all the controlled oven units is in a corresponding humidity threshold interval, if so, ending the adjustment, and if not, returning to the step S3; wherein,
the internal regulation target is a regulating valve of a controlled oven unit, wherein the opening is in an adjustable opening interval, and the current humidity meets a corresponding humidity threshold interval.
Further, the lower limit value of the adjustable opening interval is greater than or equal to the preset minimum opening, and the upper limit value of the adjustable opening interval is less than or equal to the preset maximum opening.
Further, according to the relationship between the current humidity of each section of controlled oven unit and the corresponding humidity threshold interval, adjusting the opening of the corresponding adjusting valve comprises:
under the condition that the current humidity of the controlled oven unit exceeds the upper limit value of the corresponding humidity threshold value interval, opening of the corresponding regulating valve is regulated;
under the condition that the current humidity of the controlled oven unit is lower than the lower limit value of the corresponding humidity threshold value interval, the opening of the corresponding regulating valve is reduced;
and under the condition that the current humidity of the controlled oven unit is in a corresponding humidity threshold value interval, the current opening degree of the regulating valve is kept.
Further provided is a reasonable valve adjusting strategy, when the opening of the corresponding adjusting valve is adjusted to be larger, the angle of adjustment is a1, a1=k i *(b-b2)/c1；
Wherein K is i ＝[p i-1 /p i ]*k i-1 The method comprises the steps of carrying out a first treatment on the surface of the b is the current humidity; b2 is the upper limit value of the humidity threshold interval; c1 is a constant; i is the frequency adjustment times of the exhaust fan, k 0 Is a constant; p is p i The current frequency of the exhaust fan; p is p i-1 The frequency of the exhaust fan before being adjusted to the current frequency;
when the opening of the corresponding regulating valve is regulated to be smaller, the regulating angle is a2, a2=m i *(b1-b)/c2；
Wherein m is i ＝[p i-1 /p i ]*m i-1 The method comprises the steps of carrying out a first treatment on the surface of the b1 is the lower limit value of the humidity threshold interval; c2 is a constant; i is the frequency adjustment times of the exhaust fan, m 0 Is a constant; p is p i The current frequency of the exhaust fan; p is p i-1 The frequency of the exhaust fan before being adjusted to the current frequency.
Further, when adjusting the operating frequency of the exhaust fan, the specific adjustment strategy is:
when the regulating valve of the controlled oven unit is regulated to a preset maximum opening degree and the current humidity is larger than the upper limit value of the corresponding humidity threshold value interval, the operating frequency of the exhaust fan is regulated;
and when the regulating valve of the controlled oven unit is regulated to a preset minimum opening degree and the current humidity is smaller than the lower limit value of the corresponding humidity threshold value interval, regulating the operating frequency of the exhaust fan.
Further provides a more reasonable strategy for adjusting the operating frequency of the exhaust fan, and the exhaust fan is enlargedAt the operating frequency, the increased frequency is Δp Big size ，Δp Big size ＝n1*(bm-b2)/c3；
When the operating frequency of the exhaust fan is reduced, the reduced frequency is deltap Small size ，Δp Small size ＝n2*(b1-bn)/c4；
Wherein bm is the current humidity in the controlled oven unit 4 that exceeds the upper limit value of the humidity threshold interval by the maximum, b2 is the upper limit value of the corresponding humidity threshold interval, bn is the current humidity of the controlled oven unit 4 that is below the lower limit value of the humidity threshold interval by the maximum, b1 is the lower limit value of the corresponding humidity threshold interval, and n1, n2, c3 and c4 are constants.
Further, the humidity value is detected by a humidity sensor provided in the oven and/or the exhaust duct of the controlled oven unit.
In order to avoid the step of evaporating fabric grease in the later stage, flue gas particles gather above the fabric and even drop on the fabric, the invention also provides an exhaust control method of a drying room of a fabric setting machine, wherein the drying room is provided with at least two sections of drying oven units which are sequentially communicated, the exhaust control method is carried out based on an exhaust system, and the exhaust system comprises an exhaust pipe and an exhaust fan; at least two sections of oven units are controlled oven units, each controlled oven unit comprises an oven and an exhaust pipe communicated with the oven, an adjusting valve is arranged on the exhaust pipe of each section of controlled oven unit and is communicated with the exhaust pipe, and the exhaust fan is configured on the exhaust pipe and is used for providing exhaust power;
the exhaust control method comprises the following steps:
s1, setting particle concentration threshold values of all sections of controlled oven units;
s2, enabling the exhaust fan to work at a preset frequency;
s3, detecting the current particle concentration of each section of controlled oven unit, and adjusting the opening of the corresponding adjusting valve according to the relation between the current particle concentration of each section of controlled oven unit and the corresponding particle concentration threshold value;
s4, under the condition that the current particulate matter concentration of the regulating valve of the controlled oven unit is regulated to the preset maximum opening and exceeds the corresponding particulate matter concentration threshold value, the operating frequency of the exhaust fan is gradually increased at preset intervals until the current particulate matter concentration of all the controlled oven units does not exceed the corresponding particulate matter concentration threshold value.
Further, the adjusting the opening of the corresponding adjusting valve according to the relation between the current particulate matter concentration of each section of the controlled oven unit and the corresponding particulate matter concentration threshold value comprises:
under the condition that the current particulate matter concentration of the controlled oven unit does not exceed the corresponding particulate matter concentration threshold value, the regulating valve is kept at the current opening;
and under the condition that the current particulate matter concentration of the controlled oven unit exceeds the corresponding particulate matter concentration threshold value, adjusting the opening degree of the regulating valve.
After the technical scheme is adopted, the invention has the following beneficial effects:
1. according to the invention, a humidity threshold interval is independently set for each controlled oven unit, the opening of a corresponding regulating valve is regulated according to the relation between the current humidity of each controlled oven unit and the corresponding humidity threshold interval, closed-loop control is formed, when the opening of the regulating valve cannot meet the regulation requirement by means of regulation, an air exhaust fan is added for linkage, so that the humidity of each controlled oven unit 4 is ensured to be in a target range, the water content of cloth is ensured to be stabilized to be the gram weight, balance is achieved between evaporation efficiency and energy consumption, the air exhaust amount in a drying room is ensured to be always at an optimal value, the atmosphere humidity of each controlled oven unit is kept stable, the heat loss of the drying room is greatly reduced while the product quality is ensured, the fuel is saved, the energy consumption is reduced, and the production cost is reduced;
2. the invention adopts a control method similar to humidity control to control the concentration of the particles, avoids the aggregation of the flue gas particles above the fabric, prevents the oil stains in the mixed waste gas in the fabric shaping area from dripping on the cloth, and reduces the energy consumption.
Drawings
FIG. 1 is a flow chart of a method for controlling exhaust air in a drying room of a fabric shaping machine according to the present invention;
FIG. 2 is a schematic diagram of an exhaust system according to the present invention;
FIG. 3 is a flow chart of another method for controlling exhaust air in a drying room of a fabric shaping machine according to the present invention;
FIG. 4 is a schematic diagram of another exhaust system according to the present invention;
in the figure, 1, a humidity sensor; 2. an exhaust pipe; 3. an exhaust fan; 4. a controlled oven unit; 41. an oven; 42. an exhaust pipe; 5. adjusting a valve; 6. a smoke sensor; 7. a differential pressure sensor.
Detailed Description
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 1 and 2, a drying room of a fabric setting machine is provided with at least two sections of drying oven units which are sequentially communicated, the air exhaust control method is carried out based on an air exhaust system, and the air exhaust system comprises an air exhaust pipe 2 and an air exhaust fan 3; at least two sections of oven units are controlled oven units 4, each controlled oven unit 4 comprises an oven 41 and an exhaust pipe 42 communicated with the oven 41, an adjusting valve 5 is arranged on the exhaust pipe 42 of each section of controlled oven unit 4 and is communicated with an exhaust pipe 2, and an exhaust fan 3 is arranged on the exhaust pipe 2 and used for providing exhaust power;
s1, setting humidity threshold intervals of each section of controlled oven unit 4;
s2, enabling the exhaust fan 3 to work at a preset frequency;
s3, adjusting the opening of the corresponding adjusting valve 5 according to the detected relation between the current humidity of each section of controlled oven unit 4 and the corresponding humidity threshold interval;
s4, when the regulating valve 5 of the controlled oven unit 4 is regulated to a preset maximum opening degree or a preset minimum opening degree, and the current humidity still does not meet the corresponding humidity threshold value interval:
firstly, internal adjustment is carried out, and if the internal adjustment cannot enable the current humidity of all the controlled oven units 4 to meet the corresponding humidity threshold interval, the operation frequency of the air-saving exhaust fan 3 is adjusted; or directly adjusting the running frequency of the exhaust fan 3;
after the operation frequency of the exhaust fan is adjusted, judging whether the current humidity of all the controlled oven units 4 is in the corresponding humidity threshold interval, if so, ending the adjustment, and if not, returning to the step S3; wherein,
the internal adjustment is performed by adjusting the valve 5 of the controlled oven unit 4 whose opening is in the adjustable opening section and whose current humidity satisfies the corresponding humidity threshold section.
Specifically, in this embodiment, a humidity threshold interval is set for each section of controlled oven unit 4 according to actual production needs, and the opening of the corresponding adjusting valve 5 is adjusted according to the relationship between the current humidity of each section of controlled oven unit 4 and the corresponding humidity threshold interval, so as to form closed-loop control, and when the opening of the adjusting valve 5 cannot meet the adjustment requirements by means of adjustment alone, the air exhaust fan 3 is added for linkage, so that the humidity of each section of controlled oven unit 4 is ensured to be within the target range, the water content of cloth is ensured, the cloth gram weight is stabilized, balance is achieved between the evaporation efficiency and the energy consumption, the air exhaust amount in the drying room is ensured to be always at an optimal value, the atmosphere humidity of each controlled oven unit 4 is kept stable, the heat loss of the drying room is greatly reduced while the product quality is ensured, the fuel is saved, the energy consumption is reduced, and the production cost is reduced.
In addition, it is considered that the total exhaust air amount of each controlled oven unit 4 is substantially unchanged in the case where the frequency of the exhaust air blower 3 is fixed, and therefore, in the case where the current humidity of the controlled oven unit 4 still does not satisfy the corresponding humidity threshold interval when the regulating valve 5 of the controlled oven unit 4 is adjusted to the preset maximum opening, the exhaust air amount of the other controlled oven units 4 is first compressed, thereby increasing the exhaust air amount of the controlled oven unit 4 whose regulating valve 5 is adjusted to the preset maximum opening. When the current humidity still does not meet the corresponding humidity threshold interval when the regulating valve 5 of the controlled oven unit 4 is regulated to the preset minimum opening, the air discharge quantity of other controlled oven units 4 is increased first, so that the air discharge quantity of the controlled oven unit 4 regulated to the preset minimum opening by the regulating valve 5 is reduced. Under the condition that the internal adjustment still cannot meet the requirements, the exhaust fan 3 is adjusted again, and the control strategy can reduce the change of the total exhaust amount of the exhaust system as much as possible, so that the whole drying process of the fabric is controlled.
Moreover, the embodiment adopts the strategy of firstly internally adjusting and then adjusting the frequency of the air exhaust fan 3 if the requirement cannot be met, so that the number of the controlled oven units 4 which need to readjust the adjusting valve 5 because the humidity becomes not met the threshold interval after adjusting the air exhaust fan 3 can be reduced.
The preset frequency of the exhaust fan 3 can be 25Hz, 30Hz or the like, and is set according to practical situations.
In one embodiment, the lower limit value of the adjustable opening interval is greater than or equal to a preset minimum opening, and the upper limit value of the adjustable opening interval is less than or equal to a preset maximum opening.
Preferably, the lower limit value of the adjustable opening section is larger than a preset minimum opening, and the upper limit value of the adjustable opening section is smaller than a preset maximum opening. The adjustable opening interval of the adjusting valve 5 is included between the preset maximum opening and the preset minimum opening, a certain margin is reserved, the corresponding controlled oven unit 4 is influenced by the fabric itself or other factors such as the frequency change of the exhaust fan 3 in the subsequent working process, the humidity changes, the opening of the adjusting valve 5 still has a certain adjusting space, and the humidity threshold interval can be met through self-adjustment.
In one embodiment, adjusting the opening of the corresponding adjusting valve 5 according to the relationship between the current humidity of each section of the controlled oven unit 4 and the corresponding humidity threshold interval includes:
under the condition that the current humidity of the controlled oven unit 4 exceeds the upper limit value of the corresponding humidity threshold value interval, the opening of the corresponding regulating valve 5 is regulated;
the opening degree of the corresponding regulating valve 5 is reduced under the condition that the current humidity of the controlled oven unit 4 is lower than the lower limit value of the corresponding humidity threshold value interval;
in case the current humidity of the controlled oven unit 4 is located in the corresponding humidity threshold interval, the regulating valve 5 is kept at the current opening.
In one embodiment, when the opening of the corresponding regulating valve 5 is regulated, the regulating angle is thata1，a1＝k i *(b-b2)/c1；
Wherein K is i ＝[p i-1 /p i ]*k i-1 The method comprises the steps of carrying out a first treatment on the surface of the b is the current humidity; b2 is the upper limit value of the humidity threshold interval; c1 is a constant; i is the frequency adjustment times of the exhaust fan 3, k 0 Is a constant; p is p i Is the current frequency of the exhaust fan 3; p is p i-1 The frequency of the exhaust fan 3 before being adjusted to the current frequency;
specifically, when the current humidity of a certain controlled oven unit 4 is greater than the corresponding humidity threshold interval, the opening of the regulating valve 5 is increased by k when the upper limit value c1 is exceeded i And, k i The value of (2) is related to the current frequency of the exhaust fan 3, and the greater the current frequency of the exhaust fan 3 is, k i The smaller the value of (c) is, which means that the adjustment amplitude of the adjustment valve 5 is smaller, which is advantageous for controlling the current humidity of the controlled oven unit 4.
Wherein c1 can be 1% RH, k 0 0.5% may be taken. Of course, c1 and k 0 Not limited to the above, other values may be taken according to the actual conditions of the production line.
When the opening of the corresponding regulating valve 5 is reduced, the reduced angle is a2, a2=m i *(b1-b)/c2；
Wherein m is i ＝[p i-1 /p i ]*m i-1 The method comprises the steps of carrying out a first treatment on the surface of the b1 is the lower limit value of the humidity threshold interval; c2 is a constant; i is the frequency adjustment times of the exhaust fan 3, m 0 Is a constant; p is p i Is the current frequency of the exhaust fan 3; p is p i-1 For the frequency of the exhaust fan 3 before being adjusted to the current frequency.
Specifically, when the current humidity of a certain controlled oven unit 4 is smaller than the corresponding humidity threshold interval, the opening of the regulating valve is reduced by m each time the upper limit value c2 is exceeded i And, m i The value of (3) is related to the current frequency of the exhaust fan 3, and the greater the current frequency of the exhaust fan 3, the more m i The smaller the value of (2). c2 may be 1% RH, m 0 0.5% may be taken. Of course, c2 and m 0 Not limited to the above, other values may be taken according to the actual conditions of the production line.
In one embodiment, when adjusting the operating frequency of the exhaust fan 3, the specific adjustment strategy is:
when the regulating valve 5 of the controlled oven unit 4 is regulated to a preset maximum opening degree and the current humidity is larger than the upper limit value of the corresponding humidity threshold value interval, the operating frequency of the exhaust fan 3 is regulated;
and when the regulating valve 5 of the controlled oven unit 4 is regulated to a preset minimum opening degree and the current humidity is smaller than the lower limit value of the corresponding humidity threshold value interval, regulating the operating frequency of the exhaust fan 3.
It should be noted that in the actual production process, under the condition that the equipment is normal, the condition that the adjusting valve 5 of the controlled oven unit 4 is adjusted to the preset maximum opening degree and the current humidity is greater than the upper limit value of the corresponding humidity threshold value interval does not occur at the same time, and the condition that the adjusting valve 5 of the controlled oven unit 4 is adjusted to the preset minimum opening degree and the current humidity is less than the lower limit value of the corresponding humidity threshold value interval does not occur at the same time.
In one embodiment, when the operating frequency of the exhaust fan (3) is increased, the increased frequency is Δp Big size ，Δp Big size ＝n1*(bm-b2)/c3；
When the operating frequency of the exhaust fan (3) is reduced, the reduced frequency is deltap Small size ，Δp Small size ＝n2*(b1-bn)/c4；
Wherein bm is the current humidity in the controlled oven unit 4 that exceeds the upper limit value of the humidity threshold interval by the maximum, b2 is the upper limit value of the corresponding humidity threshold interval, bn is the current humidity of the controlled oven unit 4 that is below the lower limit value of the humidity threshold interval by the maximum, b1 is the lower limit value of the corresponding humidity threshold interval, and n1, n2, c3 and c4 are constants.
Specifically, for the controlled oven unit 4 with the current humidity exceeding the upper limit value most, the frequency of the exhaust fan 3 increases by n1 every time c3 is exceeded, and when the controlled oven unit 4 has five, c3 may take 5% rh, n1 may take 2%, and when the highest frequency is 50Hz, 2% is 1Hz.
For the controlled oven unit with the current humidity lower than the maximum lower limit value, the frequency of the air exhaust fan 3 is reduced by n2 every time c4 is lower, under the condition that five controlled oven units 4 exist, c4 can take 5% RH, n2 can take 2%, and under the condition that the highest frequency is 50Hz, 2% is 1Hz.
It should be noted that the values of the parameters are not limited to the above description, and may be other values according to the production line.
In one embodiment, as shown in fig. 2, the humidity value is detected by the humidity sensor 1 provided in the oven 41 and/or the exhaust duct 42 of the controlled oven unit 4.
In one embodiment, as shown in fig. 3 and 4, a method for controlling exhaust air in a drying room of a fabric shaping machine is provided, wherein the drying room is provided with at least two drying oven units which are sequentially communicated, the exhaust air control method is performed based on an exhaust system, and the exhaust system comprises an exhaust pipe 2 and an exhaust fan 3; at least two sections of oven units are controlled oven units 4, each controlled oven unit 4 comprises an oven 41 and an exhaust pipe 42 communicated with the oven 41, an adjusting valve 5 is arranged on the exhaust pipe 42 of each section of controlled oven unit 4 and is communicated with an exhaust pipe 2, and an exhaust fan 3 is arranged on the exhaust pipe 2 and used for providing exhaust power;
the exhaust control method comprises the following steps:
s1, setting particle concentration threshold values of all sections of controlled oven units 4;
s2, enabling the exhaust fan 3 to work at a preset frequency
S3, detecting the current particle concentration of each section of controlled oven unit 4, and adjusting the opening of the corresponding adjusting valve 5 according to the relation between the current particle concentration of each section of controlled oven unit 4 and the corresponding particle concentration threshold;
s4, under the condition that the current particulate matter concentration of the regulating valve 5 of the controlled oven unit 4 is regulated to the preset maximum opening and exceeds the corresponding particulate matter concentration threshold value, the operating frequency of the air exhaust fan 3 is gradually increased at preset intervals until the current particulate matter concentration of all the controlled oven units 4 does not exceed the corresponding particulate matter concentration threshold value. The preset interval can be 0.5Hz, 1Hz, 1.5Hz and the like as required.
Specifically, the embodiment adopts a control method similar to humidity control to control the concentration of the particles, so that the aggregation of the smoke particles above the fabric is avoided, the dripping of oil stains in the mixed waste gas in the fabric shaping area on the cloth is avoided, and the energy consumption is reduced.
In one embodiment, adjusting the opening of the corresponding regulating valve 5 according to the relationship between the current particulate matter concentration of each section of the controlled oven unit 4 and the corresponding particulate matter concentration threshold value includes:
in case the current particulate matter concentration of the controlled oven unit 4 does not exceed the corresponding particulate matter concentration threshold value, keeping the regulating valve 5 at the current opening;
in case the current particulate matter concentration of the controlled oven unit 4 exceeds the corresponding particulate matter concentration threshold value, the opening of the regulating valve 5 is increased.
As shown in fig. 4, the oven 41 and/or the exhaust pipe 42 of the controlled oven unit 4 are/is provided with a smoke sensor 6, the current particle concentration of the controlled oven unit 4 is detected in real time by the smoke sensor 6, the fabric outlet of the last oven unit is provided with a differential pressure sensor 7, the differential pressure is monitored by the differential pressure sensor 7, so that the fabric outlet is in a negative pressure state, generally controlled to be-20 to-30 Pa, and the negative pressure state can prevent smoke in the oven 41 from escaping from the fabric outlet of the drying room.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (9)
1. A method for controlling the exhaust air of the drying room of a fabric shaping machine is characterized in that the drying room is provided with at least two sections of drying oven units which are communicated in sequence,
the exhaust control method is based on an exhaust system, and the exhaust system comprises an exhaust pipe (2) and an exhaust fan (3); at least two sections of oven units are controlled oven units (4), each controlled oven unit (4) comprises an oven (41) and an exhaust pipe (42) communicated with the oven (41), an adjusting valve (5) is arranged on each exhaust pipe (42) of each section of controlled oven unit (4) and is communicated with the exhaust pipe (2), and the exhaust fan (3) is arranged on the exhaust pipe (2) and is used for providing exhaust power;
the exhaust control method comprises the following steps:
s1, setting humidity threshold intervals of each section of controlled oven unit (4);
s2, enabling the exhaust fan (3) to work at a preset frequency;
s3, adjusting the opening of a corresponding adjusting valve (5) according to the relation between the detected current humidity of each section of controlled oven unit (4) and the corresponding humidity threshold value interval;
s4, when the regulating valve (5) of the controlled oven unit (4) is regulated to a preset maximum opening or a preset minimum opening, and the current humidity still does not meet the corresponding humidity threshold interval:
firstly, internally adjusting, and if the internal adjustment cannot enable the current humidity of all the controlled oven units (4) to meet the corresponding humidity threshold interval, adjusting the running frequency of the air-saving fan (3); or directly adjusting the operating frequency of the exhaust fan (3);
after the operation frequency of the exhaust fan is adjusted, judging whether the current humidity of all the controlled oven units (4) is in a corresponding humidity threshold interval, if so, ending the adjustment, and if not, returning to the step S3; wherein,
the internal regulation is performed by a regulating valve (5) of a controlled oven unit (4) with the opening degree in an adjustable opening degree interval and the current humidity meeting the corresponding humidity threshold value interval.
2. The method for controlling the exhaust air of a drying room of a fabric shaping machine according to claim 1, wherein,
the lower limit value of the adjustable opening interval is larger than or equal to the preset minimum opening, and the upper limit value of the adjustable opening interval is smaller than or equal to the preset maximum opening.
3. The method for controlling the exhaust air of a drying room of a fabric shaping machine according to claim 1, wherein,
according to the relation between the current humidity of each section of controlled oven unit (4) and the corresponding humidity threshold interval, the opening degree of the corresponding regulating valve (5) is regulated, and the method comprises the following steps:
under the condition that the current humidity of the controlled oven unit (4) exceeds the upper limit value of the corresponding humidity threshold value interval, the opening of the corresponding regulating valve (5) is regulated;
under the condition that the current humidity of the controlled oven unit (4) is lower than the lower limit value of the corresponding humidity threshold value interval, the opening of the corresponding regulating valve (5) is reduced;
and when the current humidity of the controlled oven unit (4) is in the corresponding humidity threshold value interval, the current opening degree of the regulating valve (5) is kept.
4. The method for controlling the exhaust air of a drying room of a fabric shaping machine according to claim 3, wherein,
when the opening degree of the corresponding regulating valve (5) is regulated, the regulating angle is a1, a1=k i *(b-b2)/c1；
Wherein K is i ＝[p i-1 /p i ]*k i-1 The method comprises the steps of carrying out a first treatment on the surface of the b is the current humidity; b2 is the upper limit value of the humidity threshold interval; c1 is a constant; i is the frequency adjustment times k of the exhaust fan (3) 0 Is a constant; p is p i Is the current frequency of the exhaust fan (3); p is p i-1 The frequency of the exhaust fan (3) before being adjusted to the current frequency;
when the opening of the corresponding regulating valve (5) is regulated down, the regulating angle is a2, a2=m i *(b1-b)/c2；
Wherein m is i ＝[p i-1 /p i ]*m i-1 The method comprises the steps of carrying out a first treatment on the surface of the b1 is the lower limit value of the humidity threshold interval; c2 is a constant; i is the frequency adjustment times of the exhaust fan (3), m 0 Is a constant; p is p i Is the current frequency of the exhaust fan (3); p is p i-1 The frequency of the exhaust fan (3) is adjusted to be the current frequency.
5. The method for controlling the exhaust air of a drying room of a fabric shaping machine according to claim 1, wherein,
when the operating frequency of the exhaust fan (3) is regulated, the specific regulation strategy is as follows:
when the regulating valve (5) of the controlled oven unit (4) is regulated to a preset maximum opening degree and the current humidity is larger than the upper limit value of the corresponding humidity threshold value interval, the operating frequency of the exhaust fan (3) is regulated;
and when the regulating valve (5) of the controlled oven unit (4) is regulated to a preset minimum opening degree and the current humidity is smaller than the lower limit value of the corresponding humidity threshold value interval, regulating the operating frequency of the exhaust fan (3).
6. The method for controlling exhaust air of drying room of fabric shaping machine according to claim 5, wherein,
when the operating frequency of the exhaust fan (3) is increased, the increased frequency is deltap Big size ，Δp Big size ＝n1*(bm-b2)/c3；
When the operating frequency of the exhaust fan (3) is reduced, the reduced frequency is deltap Small size ，Δp Small size ＝n2*(b1-bn)/c4；
Wherein bm is the current humidity in the controlled oven unit 4 that exceeds the upper limit value of the humidity threshold interval by the maximum, b2 is the upper limit value of the corresponding humidity threshold interval, bn is the current humidity of the controlled oven unit 4 that is below the lower limit value of the humidity threshold interval by the maximum, b1 is the lower limit value of the corresponding humidity threshold interval, and n1, n2, c3 and c4 are constants.
7. The method for controlling the exhaust air of a drying room of a fabric shaping machine according to claim 1, wherein,
the current humidity of the controlled oven unit (4) is detected by a humidity sensor (1) arranged at the oven (41) and/or the exhaust pipe (42) of the controlled oven unit (4).
8. A method for controlling the exhaust air of the drying room of a fabric shaping machine is characterized in that the drying room is provided with at least two sections of drying oven units which are communicated in sequence,
the exhaust control method is based on an exhaust system, and the exhaust system comprises an exhaust pipe (2) and an exhaust fan (3); at least two sections of oven units are controlled oven units (4), each controlled oven unit (4) comprises an oven (41) and an exhaust pipe (42) communicated with the oven (41), an adjusting valve (5) is arranged on each exhaust pipe (42) of each section of controlled oven unit (4) and is communicated with the exhaust pipe (2), and the exhaust fan (3) is arranged on the exhaust pipe (2) and is used for providing exhaust power;
the exhaust control method comprises the following steps:
s1, setting a particulate matter concentration threshold value of each section of controlled oven unit (4);
s2, enabling the exhaust fan (3) to work at a preset frequency;
s3, adjusting the opening of a corresponding adjusting valve (5) according to the relation between the detected current particle concentration of each section of controlled oven unit (4) and the corresponding particle concentration threshold value;
s4, under the condition that the current particulate matter concentration of the adjusting valve (5) of the controlled oven unit (4) is adjusted to the preset maximum opening and exceeds the corresponding particulate matter concentration threshold value, the operating frequency of the air exhaust fan (3) is gradually increased at preset intervals until the current particulate matter concentration of all the controlled oven units (4) does not exceed the corresponding particulate matter concentration threshold value.
9. The method for controlling exhaust air of drying room of fabric shaping machine according to claim 8, wherein,
according to the relation between the current particulate matter concentration of each section of controlled oven unit (4) and the corresponding particulate matter concentration threshold value, the opening degree of the corresponding regulating valve (5) is regulated, and the method comprises the following steps:
-keeping the regulating valve (5) at a current opening in case the current particulate matter concentration of the controlled oven unit (4) does not exceed the corresponding particulate matter concentration threshold;
and in the case that the current particulate matter concentration of the controlled oven unit (4) exceeds the corresponding particulate matter concentration threshold value, the opening degree of the regulating valve (5) is regulated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311687443.8A CN117870340A (en) | 2023-12-08 | 2023-12-08 | Air exhaust control method for drying room of fabric setting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311687443.8A CN117870340A (en) | 2023-12-08 | 2023-12-08 | Air exhaust control method for drying room of fabric setting machine |
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| CN202311687443.8A Pending CN117870340A (en) | 2023-12-08 | 2023-12-08 | Air exhaust control method for drying room of fabric setting machine |
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| CN (1) | CN117870340A (en) |
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- 2023-12-08 CN CN202311687443.8A patent/CN117870340A/en active Pending
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