CN113615857A - Air quantity control method and negative pressure detection device for local air separation - Google Patents
Air quantity control method and negative pressure detection device for local air separation Download PDFInfo
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- CN113615857A CN113615857A CN202110796359.4A CN202110796359A CN113615857A CN 113615857 A CN113615857 A CN 113615857A CN 202110796359 A CN202110796359 A CN 202110796359A CN 113615857 A CN113615857 A CN 113615857A
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/18—Other treatment of leaves, e.g. puffing, crimpling, cleaning
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B9/00—Control of the moisture content of tobacco products, e.g. cigars, cigarettes, pipe tobacco
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/02—Arrangement of air or material conditioning accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/04—Control arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses an air volume control method and a negative pressure detection device for in-situ air separation, which have the conception that the production stage is judged through the actual measurement value of a target moisture meter at the outlet of a cut tobacco dryer, and the opening degrees of primary and secondary air separation air doors are adjusted through a gradient control strategy at the head and tail stages to prevent impurities from entering the next process or remaining; in the production process, the corresponding production brand and the corresponding negative pressure control set values of the primary air separation and the secondary air separation are obtained through the target moisture meter, and then the air door regulating valve is automatically controlled by combining the actual measurement values of the negative pressure detection devices arranged on the primary air separation air duct and the secondary air separation air duct, so that the air quantity of the air separation is stable, and the effect of improving the purity of the air separation materials is further achieved. The invention is convenient to implement, easy to operate and flexible to control, can obviously improve the purity of the flexible in-situ winnowing and reduce the silk content in the stalks, can greatly reduce the labor amount of operators, and can particularly improve the in-situ secondary winnowing effect of the cut tobaccos by actual measurement.
Description
Technical Field
The invention relates to the field of cigarette processing and manufacturing, in particular to an air quantity control method and a negative pressure detection device for local air separation.
Background
The local winnowing machine is utilized at the outlet of the cut tobacco drying machine or the airflow drying equipment, so that the cut tobacco mass can be opened, the long tobacco can be shortened, simultaneously, the conglomeration, the coke sheet and most of stems in the cut tobacco can be effectively and flexibly separated, the inclusion property and the mixed tobacco uniformity of the cut tobacco are improved, the purity of the cut tobacco is further improved, and conditions are created for improving the rolling quality of cigarettes.
The existing working principle of flexible in-situ tobacco winnowing process equipment, rectangular pipe material low-speed winnowing air conveying process equipment and the like is that selected materials are fed into a box body by a feeding mechanism and then freely fall down, and are winnowed by twice combination of winnowing and flotation, heavy objects such as metal, conglomeration, tobacco stems, stalk sticks, coke sheets and the like fall down through a sundry outlet, and light objects such as tobacco leaves, tobacco shreds and the like are fed out of the box body by a discharging mechanism, so that the purposes of tobacco winnowing and flexible processing are achieved.
However, the above-mentioned apparatus has the disadvantage that the wind pressure (wind speed) adjustment is controlled by manually adjusting the opening of the air door during operation, and the automatic adjustment of the wind pressure (wind speed) cannot be realized, i.e. the operator often needs to observe the primary or secondary air separation condition during the production process, and continuously adjust the air door of the primary or secondary air separation according to the air separation effect to improve the air separation effect. This not only causes the increase of the amount of labour of the operators, but also the primary and secondary on-site winnowing effect can not reach the best. For example, in the material head and material tail stage, because the cut tobacco is less, if the wind speed cannot be reduced in time, sundries such as lumps, stems, coke pieces and the like can be sucked into the next procedure along with the cut tobacco, so that the aim of winnowing cannot be achieved; moreover, due to the reasons of different material structures, different grades, different impurity contents, different formulas and the like, the air separation effect is not ideal if the same air door opening degree is adopted for the tobacco shreds with different brands; and if the same grade of material in the same batch is adopted and the same air door opening degree is adopted, the ideal winnowing effect is difficult to realize due to different blockage degrees of the secondary screen and the filter screen.
Disclosure of Invention
In view of the above, the present invention is directed to an air volume control method and a negative pressure detection device for in-situ air separation to improve the purity of the air-separated material.
The technical scheme adopted by the invention is as follows:
in a first aspect, an air volume control method for in-situ air separation comprises the following steps:
predetermining a target moisture meter arranged at an outlet of the cut tobacco dryer and acquiring a corresponding production brand;
after production is started, judging whether the actually measured moisture value of the target moisture meter is larger than a preset initial moisture value or not;
if so, regulating and controlling a primary air separation air door regulating valve and a secondary air separation air door regulating valve according to a preset gradient on the basis of the initial air door opening degree, so that the air door opening degree is gradually increased, and meanwhile, monitoring the change of the actually measured moisture value;
when the actually measured moisture value is larger than a preset first moisture set value, acquiring a preset primary air separation negative pressure set value and a preset secondary air separation negative pressure set value according to the production grade;
continuously collecting a primary air separation negative pressure measured value and a secondary air separation negative pressure measured value through a negative pressure detection device which is pre-installed in a primary air separation air duct and a secondary air separation air duct;
respectively regulating and controlling the primary air separation air door regulating valve and the secondary air separation air door regulating valve according to the primary air separation negative pressure set value, the secondary air separation negative pressure set value, the primary air separation negative pressure measured value and the secondary air separation negative pressure measured value, and simultaneously monitoring the change of the measured moisture value;
and when the actually measured moisture value is smaller than a preset second moisture set value, regulating and controlling the primary air separation air door regulating valve and the secondary air separation air door regulating valve according to a preset gradient on the basis of the current air door opening, so that the air door opening is gradually reduced.
In at least one possible implementation, the step-wise increasing the opening degree of the damper includes: when the opening degree of the air door is increased to a preset first opening degree upper limit value, stopping gradually increasing and regulating;
the step-by-step reduction of the throttle opening degree includes: and when the opening degree of the air door is reduced to a preset opening degree lower limit value, stopping gradual reduction regulation.
In at least one possible implementation manner, the determining whether the measured moisture value of the target moisture meter is greater than a preset initial moisture value includes: and judging whether the actually measured moisture value of the target moisture meter is greater than a preset initial moisture value and lasts for a first preset time.
In at least one possible implementation manner, the step of when the measured moisture value is greater than a preset first moisture set value includes: and when the actually measured moisture value is larger than a preset first moisture set value and lasts for a second preset time.
In at least one possible implementation manner, when the measured moisture value is smaller than a preset second moisture set value, the method includes: and when the actually measured moisture value is smaller than a preset second moisture set value and lasts for a third preset time.
In at least one possible implementation manner, the respectively adjusting and controlling the primary air separation damper valve and the secondary air separation damper valve comprises: and when the opening degree of the air door is increased to a preset second opening degree upper limit value, outputting an alarm signal.
In a second aspect, a negative pressure detecting device for in-situ air separation comprises: the device comprises a first negative pressure sensor, a second negative pressure sensor, a first metal pipe and a second metal pipe;
the first negative pressure sensor is arranged at one end of the first metal pipe, and the other end of the first metal pipe is arranged on an air channel between the primary air separation drum-type screen and the primary air separation air door regulating valve;
the second negative pressure sensor is arranged at one end of the second metal pipe, and the other end of the second metal pipe is arranged on an air channel between the secondary air separation pull type screen and the secondary air separation air door regulating valve.
In at least one possible implementation manner, the installation angles of the first metal pipe and the second metal pipe on the corresponding air ducts are both: is inclined by 20-40 degrees towards the wind direction.
In at least one possible implementation manner, the first metal pipe, the second metal pipe, the corresponding first negative pressure sensor, the corresponding second negative pressure sensor and the corresponding air duct are all in threaded connection.
In at least one possible implementation manner, the first metal pipe and the second metal pipe are both stainless steel pipes with preset lengths.
The design concept of the invention is that the production stage is judged by the measured value of the target moisture meter at the outlet of the cut tobacco dryer, and the opening degree of the primary and secondary air separation air doors is adjusted by a gradient control strategy at the material head and material tail stages to prevent impurities from entering the next process or remaining; in the production process, the corresponding production brand and the corresponding negative pressure control set values of the primary air separation and the secondary air separation are obtained through the target moisture meter, and then the air door regulating valve is automatically controlled by combining the actual measurement values of the negative pressure detection devices arranged on the primary air separation air duct and the secondary air separation air duct, so that the air quantity of the air separation is stable, and the effect of improving the purity of the air separation materials is further achieved. The invention is convenient to implement, easy to operate and flexible to control, can obviously improve the purity of the flexible in-situ winnowing and reduce the silk content in the stalks, can greatly reduce the labor amount of operators, and can particularly improve the in-situ secondary winnowing effect of the cut tobaccos by actual measurement.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings, in which:
fig. 1 is a flow chart of an air volume control method for in-situ air separation according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
The invention provides an embodiment of an air volume control method for local air separation, which is specifically shown in figure 1 and can comprise the following steps:
step S1, predetermining a target moisture meter arranged at an outlet of the cut tobacco dryer and acquiring a corresponding production brand;
step S2, after production is started, whether the actually measured moisture value of the target moisture meter is larger than a preset initial moisture value is judged;
if yes, executing step S3, regulating and controlling a primary air separation air door regulating valve and a secondary air separation air door regulating valve according to a preset gradient on the basis of the initial air door opening degree, gradually increasing the air door opening degree, and simultaneously monitoring the change of the actually measured moisture value;
step S4, when the measured moisture value is larger than a preset first moisture set value, acquiring a preset primary air separation negative pressure set value and a preset secondary air separation negative pressure set value according to the production grade;
step S5, continuously collecting a primary air separation negative pressure measured value and a secondary air separation negative pressure measured value through negative pressure detection devices pre-installed in a primary air separation air duct and a secondary air separation air duct;
step S6, respectively regulating and controlling the primary air separation air door regulating valve and the secondary air separation air door regulating valve according to the primary air separation negative pressure set value, the secondary air separation negative pressure set value, the primary air separation negative pressure measured value and the secondary air separation negative pressure measured value, and simultaneously monitoring the change of the measured moisture value;
and step S7, when the actually measured moisture value is smaller than a preset second moisture set value, regulating and controlling the primary air door regulating valve and the secondary air door regulating valve according to a preset gradient on the basis of the current air door opening, so that the air door opening is gradually reduced.
Further, the step-increasing the throttle opening degree includes: when the opening degree of the air door is increased to a preset first opening degree upper limit value, stopping gradually increasing and regulating; the step-by-step reduction of the throttle opening degree includes: and when the opening degree of the air door is reduced to a preset opening degree lower limit value, stopping gradual reduction regulation.
Further, the determining whether the measured moisture value of the target moisture meter is greater than a preset initial moisture value includes: and judging whether the actually measured moisture value of the target moisture meter is greater than a preset initial moisture value and lasts for a first preset time.
Further, when the measured moisture value is greater than a preset first moisture set value, the method includes: and when the actually measured moisture value is larger than a preset first moisture set value and lasts for a second preset time.
Further, when the measured moisture value is smaller than a preset second moisture set value, the method includes: and when the actually measured moisture value is smaller than a preset second moisture set value and lasts for a third preset time.
Further, it is right respectively one-level selection by winnowing air door governing valve and second grade selection by winnowing air door governing valve adjusts and control and includes: and when the opening degree of the air door is increased to a preset second opening degree upper limit value, outputting an alarm signal.
As mentioned above, the prior art adopts manual damper adjustment, so in order to realize the above control method, the present invention further provides a negative pressure detection device for on-site air separation, which may include: the device comprises a first negative pressure sensor, a second negative pressure sensor, a first metal pipe and a second metal pipe.
The first negative pressure sensor is arranged at one end of the first metal pipe, and the other end of the first metal pipe is arranged on an air channel between the primary air separation drum-type screen and the primary air separation air door regulating valve;
the second negative pressure sensor is arranged at one end of the second metal pipe, and the other end of the second metal pipe is arranged on an air channel between the secondary air separation pull type screen and the secondary air separation air door regulating valve.
Further, the installation angles of the first metal pipe and the second metal pipe on the corresponding air duct are both: is inclined at 20-40 degrees, preferably 30 degrees, towards the wind direction.
Furthermore, the first metal pipe, the second metal pipe, the corresponding first negative pressure sensor, the corresponding second negative pressure sensor and the corresponding air duct are all in threaded connection.
Furthermore, the first metal pipe and the second metal pipe are both stainless steel pipes with preset lengths.
To facilitate an understanding of the above embodiments and their preferred versions, the following exemplary illustrations are provided herein:
after production is started, when the signal of a moisture meter at the outlet of the cut tobacco dryer is larger than 1.0% and is delayed for 2 seconds (which can be understood as a stub bar stage), the opening of the air door can be increased by a certain opening degree per second on the basis of 20%, through the stepped mechanism, the opening of the air door is gradually increased, but the maximum opening degree cannot exceed 70%, and the design aim is to prevent sundries such as stems and the like at the stub bar stage from directly entering the next process under relatively large air volume.
When the outlet moisture meter signal reaches a set first process value and is delayed for 5 seconds (can be understood as a material middle stage, namely a normal production operation stage meeting set process requirements), the negative pressure control set values of the primary air separation and the secondary air separation can be determined according to the production marks corresponding to the outlet moisture meter channel, the negative pressure actual measurement signals of the primary air separation and the secondary air separation are collected through a negative pressure generating and sensing device (a metal pipe and a negative pressure sensor), a primary air separation negative pressure PID control strategy and a secondary air separation negative pressure PID control strategy are called, and the automatic negative pressure control mode is entered. In the process, when the opening degree of the primary air separation air door is detected to be larger than 75%, an alarm signal can be sent, and the larger opening degree indicates that the primary air separation drum-type screen is blocked and needs to be cleaned or the air quantity of the primary air separation dust removal fan of the dust removal chamber is too small, and related personnel need to be prompted to check the fan frequency of the dust removal system or clean dust removal bags and the like; similarly, when the opening degree of the secondary air separation air door is detected to be larger than 75%, an alarm signal can be sent, and the larger opening degree indicates that the secondary air separation pull type screen is blocked and needs to be cleaned or the air quantity of the secondary air separation dust removal fan of the dust removal chamber is too small, and related personnel need to be prompted to check the fan frequency of the dust removal system or clean dust removal bags and the like.
When the signal of the moisture meter at the outlet of the cut-tobacco drier is smaller than the set second process value and is delayed for 2 seconds (the material tail stage can be understood), the opening degree of the air door is reduced by a certain opening degree every second on the basis of the existing opening degree, and the opening degree of the air door is gradually increased through the step-type mechanism, but the minimum opening degree cannot be lower than 20%. The design aim is to prevent sundries such as stems and the like from remaining in the material tail stage.
Specifically, the negative pressure sensor may be selected, for example, but not limited to, a negative pressure sensor of KZY-KO-HSAG-24V, which can output 4 to 20mA with a range of 0 to-13 KPa. Then, a mechanism capable of generating negative pressure can be designed, for example, two stainless steel pipes are adopted, one stainless steel pipe is arranged on an air channel between the primary air separation drum-type screen mesh and the air door adjusting valve of the primary air separation drum-type screen mesh, and the other stainless steel pipe is arranged on an air channel between the secondary air separation pull-type screen mesh and the air door adjusting valve of the secondary air separation pull-type screen mesh (the length of the steel pipe is preferably about 40cm, the thickness of the steel pipe is moderate, if the length is not properly selected, the generated negative pressure after installation is relatively small and unstable, besides, the installation angle of the metal pipe and the air channel can obtain more stable and obvious negative pressure in an inclined interval through practical verification, and the negative pressure air volume is preferably 30 degrees for facilitating regulation and control based on the negative pressure air volume). In some embodiments, the inner diameter of the steel pipe is matched with the mounting outer diameter of the selected negative pressure sensor, the inner diameter of one end of the steel pipe can be sleeved with a thread, and the mounting outer thread of the negative pressure sensor can be tightly matched with the thread at the position; the outer diameter of the other end of the steel pipe can be sheathed with threads, so that the steel pipe is convenient to be fixedly arranged on the corresponding air separation air channel.
In summary, the design concept of the invention is that the production stage is judged by the measured value of the target moisture meter at the outlet of the cut tobacco dryer, and the opening degree of the primary and secondary air separation dampers is adjusted by a gradient control strategy at the material head and material tail stages to prevent impurities from entering the next process or remaining; in the production process, the corresponding production brand and the corresponding negative pressure control set values of the primary air separation and the secondary air separation are obtained through the target moisture meter, and then the air door regulating valve is automatically controlled by combining the actual measurement values of the negative pressure detection devices arranged on the primary air separation air duct and the secondary air separation air duct, so that the air quantity of the air separation is stable, and the effect of improving the purity of the air separation materials is further achieved. The invention is convenient to implement, easy to operate and flexible to control, can obviously improve the purity of the flexible in-situ winnowing and reduce the silk content in the stalks, can greatly reduce the labor amount of operators, and can particularly improve the in-situ secondary winnowing effect of the cut tobaccos by actual measurement.
In the embodiments of the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and may mean that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c may represent: a, b, c, a and b, a and c, b and c or a and b and c, wherein a, b and c can be single or multiple.
The structure, features and effects of the present invention have been described in detail with reference to the embodiments shown in the drawings, but the above embodiments are merely preferred embodiments of the present invention, and it should be understood that technical features related to the above embodiments and preferred modes thereof can be reasonably combined and configured into various equivalent schemes by those skilled in the art without departing from and changing the design idea and technical effects of the present invention; therefore, the invention is not limited to the embodiments shown in the drawings, and all the modifications and equivalent embodiments that can be made according to the idea of the invention are within the scope of the invention as long as they are not beyond the spirit of the description and the drawings.
Claims (10)
1. An air volume control method for in-situ air separation, comprising:
predetermining a target moisture meter arranged at an outlet of the cut tobacco dryer and acquiring a corresponding production brand;
after production is started, judging whether the actually measured moisture value of the target moisture meter is larger than a preset initial moisture value or not;
if so, regulating and controlling a primary air separation air door regulating valve and a secondary air separation air door regulating valve according to a preset gradient on the basis of the initial air door opening degree, so that the air door opening degree is gradually increased, and meanwhile, monitoring the change of the actually measured moisture value;
when the actually measured moisture value is larger than a preset first moisture set value, acquiring a preset primary air separation negative pressure set value and a preset secondary air separation negative pressure set value according to the production grade;
continuously collecting a primary air separation negative pressure measured value and a secondary air separation negative pressure measured value through a negative pressure detection device which is pre-installed in a primary air separation air duct and a secondary air separation air duct;
respectively regulating and controlling the primary air separation air door regulating valve and the secondary air separation air door regulating valve according to the primary air separation negative pressure set value, the secondary air separation negative pressure set value, the primary air separation negative pressure measured value and the secondary air separation negative pressure measured value, and simultaneously monitoring the change of the measured moisture value;
and when the actually measured moisture value is smaller than a preset second moisture set value, regulating and controlling the primary air separation air door regulating valve and the secondary air separation air door regulating valve according to a preset gradient on the basis of the current air door opening, so that the air door opening is gradually reduced.
2. The air volume control method for in-situ air separation as claimed in claim 1, wherein said gradually increasing the opening degree of the damper comprises: when the opening degree of the air door is increased to a preset first opening degree upper limit value, stopping gradually increasing and regulating;
the step-by-step reduction of the throttle opening degree includes: and when the opening degree of the air door is reduced to a preset opening degree lower limit value, stopping gradual reduction regulation.
3. The method as claimed in claim 1, wherein the determining whether the measured moisture value of the target moisture meter is greater than a predetermined initial moisture value comprises: and judging whether the actually measured moisture value of the target moisture meter is greater than a preset initial moisture value and lasts for a first preset time.
4. The method as claimed in claim 1, wherein said step of determining if said measured moisture level is greater than a predetermined first moisture level comprises: and when the actually measured moisture value is larger than a preset first moisture set value and lasts for a second preset time.
5. The method as claimed in claim 1, wherein said step of determining if said measured moisture level is less than a predetermined second moisture level comprises: and when the actually measured moisture value is smaller than a preset second moisture set value and lasts for a third preset time.
6. The method for controlling the air volume for the on-site air separation according to any one of claims 1 to 5, wherein the separately controlling the primary air separation damper valve and the secondary air separation damper valve comprises: and when the opening degree of the air door is increased to a preset second opening degree upper limit value, outputting an alarm signal.
7. A negative pressure detection device for in-situ air separation is characterized by comprising: the device comprises a first negative pressure sensor, a second negative pressure sensor, a first metal pipe and a second metal pipe;
the first negative pressure sensor is arranged at one end of the first metal pipe, and the other end of the first metal pipe is arranged on an air channel between the primary air separation drum-type screen and the primary air separation air door regulating valve;
the second negative pressure sensor is arranged at one end of the second metal pipe, and the other end of the second metal pipe is arranged on an air channel between the secondary air separation pull type screen and the secondary air separation air door regulating valve.
8. The negative pressure detection device for on-site air separation as claimed in claim 7, wherein the installation angles of the first metal pipe and the second metal pipe on the corresponding air duct are as follows: is inclined by 20-40 degrees towards the wind direction.
9. The negative pressure detecting device for on-site air separation as claimed in claim 7 or 8, wherein the first metal tube, the second metal tube, the corresponding first negative pressure sensor, the corresponding second negative pressure sensor and the corresponding air duct are in threaded connection.
10. The negative pressure detecting device for on-site air separation as claimed in claim 7 or 8, wherein the first metal pipe and the second metal pipe are stainless steel pipes with preset lengths.
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| CN202110796359.4A CN113615857B (en) | 2021-07-14 | 2021-07-14 | Air quantity control method and negative pressure detection device for local air separation |
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| CN202110796359.4A CN113615857B (en) | 2021-07-14 | 2021-07-14 | Air quantity control method and negative pressure detection device for local air separation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114376258A (en) * | 2022-02-17 | 2022-04-22 | 龙岩烟草工业有限责任公司 | Control method of airflow cut-tobacco drier and airflow cut-tobacco drier |
| CN115084703A (en) * | 2022-08-18 | 2022-09-20 | 深圳市杰成镍钴新能源科技有限公司 | Retired power battery recycling method, device and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101053868A (en) * | 2007-04-06 | 2007-10-17 | 江苏智思机械集团有限公司 | Tobacco material wind selection method and device |
| WO2015023160A1 (en) * | 2013-08-16 | 2015-02-19 | Shon Chang Kyu | Exhaust air heat recovery system of tobacco leaf agricultural product dryer |
| CN109939933A (en) * | 2019-03-27 | 2019-06-28 | 福建中烟工业有限责任公司 | A kind of method and system controlling cut tobacco winnowing machine throttle opening |
| CN110090799A (en) * | 2019-06-06 | 2019-08-06 | 福建中烟工业有限责任公司 | Multistage pneumatic separation system and control method |
| CN211839058U (en) * | 2020-03-20 | 2020-11-03 | 四川中烟工业有限责任公司 | Novel leaf silk air classification system |
-
2021
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101053868A (en) * | 2007-04-06 | 2007-10-17 | 江苏智思机械集团有限公司 | Tobacco material wind selection method and device |
| WO2015023160A1 (en) * | 2013-08-16 | 2015-02-19 | Shon Chang Kyu | Exhaust air heat recovery system of tobacco leaf agricultural product dryer |
| CN109939933A (en) * | 2019-03-27 | 2019-06-28 | 福建中烟工业有限责任公司 | A kind of method and system controlling cut tobacco winnowing machine throttle opening |
| CN110090799A (en) * | 2019-06-06 | 2019-08-06 | 福建中烟工业有限责任公司 | Multistage pneumatic separation system and control method |
| CN211839058U (en) * | 2020-03-20 | 2020-11-03 | 四川中烟工业有限责任公司 | Novel leaf silk air classification system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114376258A (en) * | 2022-02-17 | 2022-04-22 | 龙岩烟草工业有限责任公司 | Control method of airflow cut-tobacco drier and airflow cut-tobacco drier |
| CN114376258B (en) * | 2022-02-17 | 2023-02-17 | 龙岩烟草工业有限责任公司 | Control method of airflow cut-tobacco drier and airflow cut-tobacco drier |
| CN115084703A (en) * | 2022-08-18 | 2022-09-20 | 深圳市杰成镍钴新能源科技有限公司 | Retired power battery recycling method, device and system |
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| CN113615857B (en) | 2022-10-25 |
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