CN100355373C - Method for controlling stabilit yof moisture content of outlet of on-line cut tobacco drying and bulking equipment - Google Patents
Method for controlling stabilit yof moisture content of outlet of on-line cut tobacco drying and bulking equipment Download PDFInfo
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- CN100355373C CN100355373C CNB2005100434942A CN200510043494A CN100355373C CN 100355373 C CN100355373 C CN 100355373C CN B2005100434942 A CNB2005100434942 A CN B2005100434942A CN 200510043494 A CN200510043494 A CN 200510043494A CN 100355373 C CN100355373 C CN 100355373C
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Abstract
The present invention provides a control method for improving the water content stability of an on-line expansion equipment outlet, which comprises the steps that (1). the fluctuation quantity of water content of equipment inlet superimposed on the set value for controlling water to realize the precompensation of water content stability of outlet shredded tobacco; (2). when the water content of shredded tobacco of the equipment outlet is further less than the set value, the set value for controlling water is greatly appended; (3). when the water content of shredded tobacco of the equipment outlet is approximate to the set value, the set value for controlling water is slightly corrected; (4). when the water content of shredded tobacco of the equipment outlet is approximate to the set value, the aperture value of a regulating valve for controlling water is kept. In the present invention, the water content of shredded tobacco inlet and the water content of shredded tobacco outlet are analyzed, compared and controlled by programs; therefore, the water content stability of the shredded tobacco of the equipment outlet is improved. Compared with the original control mode, the yield of the water content of shredded tobacco is improved more than 20%.
Description
(1) technical field:
The present invention relates to the control method of the online tobacco shreds drying bloating plant of tobacco business moisture content of outlet stability.
(2) background technology:
The electric automatic control of online tobacco shreds drying bloating plant (hereinafter to be referred as HXD (High expand dry)) is advanced but complicated, its process principle is by high-temperature technology gas pipe tobacco to be carried out rapid expansion drying dehydration, the subject matter that this processing mode exists is the moisture in cut tobacco instability of being processed, even it is also not obvious that program is adjusted effect.All there is hydrolabile problem in the online tobacco shreds drying bloating plant production line that present domestic cigarette factory is put into operation.
(3) summary of the invention:
The present invention is directed to the moisture instability problem that online tobacco shreds drying bloating plant exists, a kind of control method that improves online bloating plant moisture content of outlet stability is provided.
The present invention adopts following solution:
This control method may further comprise the steps:
(1). to the undulate quantity of the inlet moisture of equipment, be superimposed upon on the control water setting value, realize the stable precompensation of outlet moisture in cut tobacco;
(2). when equipment exported moisture in cut tobacco away from setting value, control water setting value was appended significantly;
(3). when equipment exported moisture in cut tobacco relatively near setting value, control water setting value was revised by a small margin;
(4). when the approaching setting value of equipment outlet moisture in cut tobacco, retentive control water regulating valve opening value.
The present invention analyzes comparison and control to pipe tobacco inlet moisture and moisture content of outlet by control program, has improved the stability of equipment outlet moisture in cut tobacco accordingly, compares with existing control mode, and the qualification rate of moisture in cut tobacco improves more than 20%.
(4) description of drawings:
Fig. 1 is the flow chart of pipe tobacco by equipment.
Fig. 2 is a control program block diagram of the present invention.
Wherein: 1, inlet Moisture Meter, 2, the control sprinkler head, 3, the moisture content of outlet instrument
(5) specific embodiment:
Fig. 1 has provided the flow chart of pipe tobacco by equipment, and pipe tobacco passes through inlet Moisture Meter 1, control sprinkler head 2 and moisture content of outlet instrument 3 successively from pipe tobacco moisture regain equipment.The following regulation of intercropping during to each section:
The A section time: under the condition of normal operation, pick up counting when below inlet Moisture Meter 1, putting into mark, stop timing, continuous three times and average to the porch of HXD.
The meaning of determining this section period is: determine that the pipe tobacco (moisture in cut tobacco data record) of inlet Moisture Meter 1 below arrives the time at control sprinkler head 2 places, the moisture data of tested pipe tobacco are preserved and time-delay, and the time of time-delay is exactly that pipe tobacco arrives HXD porch (top of control sprinkler head 2) from inlet Moisture Meter 1.After the moisture data arrive delay time, take out the undulating value that moisture in cut tobacco data and HXD setting value relatively calculates moisture.Be used to control the calculating of water setting value stack amount.
B section time: HXD is treating the material state, and the porch of pipe tobacco being put into HXD picks up counting, and discharges to arrive moisture content of outlet instrument 2 and stop timing from the exit of HXD when pipe tobacco for continuous ten times and average.
The meaning of determining this section period is: the pipe tobacco of definite control sprinkler head 2 tops arrives the time of HXD moisture content of outlet instrument 3 belows, and the B section time is identified for judging the time of adjustment when the approaching setting value of HXD moisture content of outlet and arrival setting value.
By following steps equipment moisture content of outlet stability is controlled:
(1). the inlet Moisture Meter 1 to HXD is carried out data acquisition, data are preserved and the actual material of delaying time when arriving the top of control sprinkler head 2, the difference of dividing setting value with these data and HXD inlet water (proportion is generally between the 0.5-1.0) by a certain percentage is superimposed upon on the setting value of control water and eliminates the fluctuation of supplied materials moisture to exporting the influence of moisture in cut tobacco.
(2). in the moisture of HXD outlet pipe tobacco during (＞| ± 0.45%|HXD moisture content of outlet setting value), control amount of water rapidly by control water PID (P ratio, I integration, D differential regulator) moisture of equipment outlet is got back in the normal range (NR) away from setting value.
(3). when HXD exports moisture in cut tobacco relatively near setting value (＜| ± 0.3%|HXD moisture content of outlet setting value), setting value to control water remains unchanged earlier, retention time is institute's elapsed time (B section time) below the pipe tobacco above the control sprinkler head 2 arrives HXD moisture content of outlet instrument 3, when these pipe tobaccos arrive the below of HXD moisture content of outlet instrument 3, equipment outlet moisture in cut tobacco is carried out data acquisition and calculates mean value, judge that whether amount of water is suitable, carries out suitable correction to amount of water.
(4). when HXD outlet moisture in cut tobacco arrives setting value, the aperture of retentive control water regulating valve, process time-delay (B section time) collecting device moisture content of outlet is again judged.Enter next control circulation.
Fig. 2 has provided control program block diagram of the present invention.Wherein:
SP: the setting value of online bloating plant HXD outlet moisture in cut tobacco, with % (moisture content of pipe tobacco) expression.
The measured value of PV:HXD outlet moisture in cut tobacco is represented with %.
Sp now: calculate the setting value of the control water yield that makes new advances, usefulness L/H (rise/hour) expression.
Sp old: the setting value of the control water yield that the last time calculates, usefulness L/H (rise/hour) expression.
Factor: the span of control limit of control (empirical value) of the control water yield.
The setting value and the measured value of moisture Sp and moisture Pv:HXD moisture content of outlet.Represent with %.
30 seconds: the B section time (pipe tobacco of control sprinkler head top arrives institute's elapsed time of HXD moisture content of outlet instrument below) was used above control mode and former control mode relatively, and the qualification rate of moisture improves more than 20%.
Claims (1)
1. control method that improves online bloating plant moisture content of outlet stability, it is characterized in that: this control method may further comprise the steps:
(1). to the undulate quantity of the inlet moisture of equipment, be superimposed upon on the control water setting value, realize the stable precompensation of outlet moisture in cut tobacco;
(2). when equipment exported moisture in cut tobacco away from setting value, control water setting value was appended significantly;
(3). when equipment exported moisture in cut tobacco relatively near setting value, control water setting value was revised by a small margin;
(4). when the approaching setting value of equipment outlet moisture in cut tobacco, retentive control water regulating valve opening value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100434942A CN100355373C (en) | 2005-05-17 | 2005-05-17 | Method for controlling stabilit yof moisture content of outlet of on-line cut tobacco drying and bulking equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100434942A CN100355373C (en) | 2005-05-17 | 2005-05-17 | Method for controlling stabilit yof moisture content of outlet of on-line cut tobacco drying and bulking equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1692844A CN1692844A (en) | 2005-11-09 |
| CN100355373C true CN100355373C (en) | 2007-12-19 |
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| CNB2005100434942A Active CN100355373C (en) | 2005-05-17 | 2005-05-17 | Method for controlling stabilit yof moisture content of outlet of on-line cut tobacco drying and bulking equipment |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103704875B (en) * | 2012-10-09 | 2016-01-20 | 北京精密机电控制设备研究所 | A kind of high accuracy tobacco-shred water control method and control system thereof |
| CN103211295A (en) * | 2013-04-19 | 2013-07-24 | 湖南中烟工业有限责任公司 | Control method and device of moisture on outlet of tobacco damping machine |
| CN103315383B (en) * | 2013-06-19 | 2015-10-14 | 浙江中烟工业有限责任公司 | A kind of tobacco cutting feeds in raw material humidity control method |
| CN104522872B (en) * | 2014-11-05 | 2016-03-16 | 上海烟草集团有限责任公司 | The method of work of multi-mode thin slice roasting plant and moisture control subsystem thereof |
| CN105595390B (en) * | 2015-12-30 | 2017-03-22 | 山东中烟工业有限责任公司 | Method for improving stability of outlet moisture of stem moistening machine in stub bar stage |
| CN106617245B (en) * | 2017-01-20 | 2018-06-05 | 福建中烟工业有限责任公司 | Selection by winnowing exports method for controlling water content, device and system to expanded cut tobacco on the spot |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4709708A (en) * | 1983-07-21 | 1987-12-01 | The Japan Tobacco & Salt Public Corporation | Control system for humidity controller of tobacco leaves |
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2005
- 2005-05-17 CN CNB2005100434942A patent/CN100355373C/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4709708A (en) * | 1983-07-21 | 1987-12-01 | The Japan Tobacco & Salt Public Corporation | Control system for humidity controller of tobacco leaves |
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Owner name: SHANDONG ZHONGYAN INDUSTRY CO., LTD. Free format text: FORMER OWNER: JIANGJUN TOBACCO GROUP CO. LTD. Effective date: 20070713 |
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Effective date of registration: 20070713 Address after: 250100 Shandong city of Ji'nan Province East Ring Road No. 431 Applicant after: China Tobacco Shandong Industrial Corporation Address before: Licheng District 250100 Shandong city of Ji'nan Province General Road No. 80 Applicant before: Jiangjun Tobacco Group Co., Ltd. |
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