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
本发明提供了一种提高在线膨胀设备出口水分稳定性的控制方法。该控制方法包括以下步骤：(1).对设备的入口水分的波动量，叠加在控制水设定值上，实现出口烟丝水分稳定的预补偿；(2).在设备出口烟丝水分远离设定值时，控制水设定值进行大幅度追加；(3).在设备出口烟丝水分相对接近设定值时，控制水设定值进行小幅度修正；(4).在设备出口烟丝水分接近设定值时，保持控制水调节阀开度值。本发明对烟丝入口水分和出口水分通过控制程序来分析比较和控制，相应的提高了设备出口烟丝水分的稳定性，与原有控制方式比较，烟丝水分的合格率提高20%以上。
The invention provides a control method for improving the outlet moisture stability of an online expansion device. The control method includes the following steps: (1). The fluctuation of the moisture in the inlet of the equipment is superimposed on the set value of the control water to realize pre-compensation for the stability of the moisture in the cut tobacco at the outlet; (2). The moisture in the cut tobacco at the outlet of the equipment is far from the set value (3) When the moisture content of the shredded tobacco at the outlet of the equipment is relatively close to the set value, the set value of the control water is slightly corrected; (4). When the moisture content of the shredded tobacco at the outlet of the equipment is close to the set value When setting the value, keep the opening value of the control water regulating valve. The invention analyzes, compares and controls the inlet moisture and outlet moisture of shredded tobacco through a control program, and correspondingly improves the stability of the shredded tobacco moisture at the outlet of the equipment. Compared with the original control method, the qualification rate of the shredded tobacco moisture is increased by more than 20%.
Description
(一)技术领域：(1) Technical field:
本发明涉及烟草行业在线烟丝干燥膨胀设备出口水分稳定性的控制方法。The invention relates to a method for controlling the moisture stability at the outlet of an online shredded tobacco drying and expanding equipment in the tobacco industry.
(二)背景技术：(two) background technology:
在线烟丝干燥膨胀设备(以下简称HXD(High expand dry))的电气自动控制先进但复杂，其加工原理是通过高温工艺气体对烟丝进行迅速膨胀干燥脱水，这种加工方式存在的主要问题是所加工的烟丝水分不稳定，即使对程序进行调整效果也不明显。目前国内烟厂所投入运行的在线烟丝干燥膨胀设备生产线都存在水分不稳定的问题。The electrical automatic control of the online shredded tobacco drying and expansion equipment (hereinafter referred to as HXD (High expand dry)) is advanced but complicated. Its processing principle is to rapidly expand, dry and dehydrate shredded tobacco through high-temperature process gas. The moisture in cut tobacco is unstable, even if the program is adjusted, the effect is not obvious. At present, the online cut tobacco drying and expansion equipment production lines put into operation in domestic tobacco factories all have the problem of moisture instability.
(三)发明内容：(3) Contents of the invention:
本发明针对在线烟丝干燥膨胀设备存在的水分不稳定问题，提供一种提高在线膨胀设备出口水分稳定性的控制方法。The invention aims at the moisture instability problem existing in the on-line shredded tobacco drying and expansion equipment, and provides a control method for improving the moisture stability at the outlet of the on-line expansion equipment.
本发明采用以下解决方案：The present invention adopts following solutions:
该控制方法包括以下步骤：The control method includes the following steps:
(1).对设备的入口水分的波动量，叠加在控制水设定值上，实现出口烟丝水分稳定的预补偿；(1). The fluctuation of the inlet moisture of the equipment is superimposed on the set value of the control water to realize the pre-compensation of the stable moisture of the outlet tobacco;
(2).在设备出口烟丝水分远离设定值时，控制水设定值进行大幅度追加；(2). When the moisture in cut tobacco at the outlet of the equipment is far from the set value, the set value of the control water is greatly increased;
(3).在设备出口烟丝水分相对接近设定值时，控制水设定值进行小幅度修正；(3). When the moisture content of cut tobacco at the outlet of the equipment is relatively close to the set value, the set value of the control water is slightly corrected;
(4).在设备出口烟丝水分接近设定值时，保持控制水调节阀开度值。(4). When the moisture content of cut tobacco at the outlet of the equipment is close to the set value, keep the opening value of the control water regulating valve.
本发明对烟丝入口水分和出口水分通过控制程序来分析比较和控制，相应的提高了设备出口烟丝水分的稳定性，与现有控制方式比较，烟丝水分的合格率提高20％以上。The present invention analyzes, compares and controls the moisture at the inlet and outlet of shredded tobacco through a control program, and correspondingly improves the stability of the shredded tobacco at the outlet of the equipment. Compared with the existing control method, the qualified rate of the shredded tobacco moisture is increased by more than 20%.
(四)附图说明：(4) Description of drawings:
图1是烟丝通过设备的流程图。Figure 1 is a flow chart of shredded tobacco passing through the device.
图2是本发明的控制程序框图。Fig. 2 is a control program block diagram of the present invention.
其中：1、入口水分仪，2、控制水喷头，3、出口水分仪Among them: 1. Inlet moisture meter, 2. Control water nozzle, 3. Outlet moisture meter
(五)具体实施方式：(5) Specific implementation methods:
图1给出了烟丝通过设备的流程图，烟丝从烟丝回潮设备依次通过入口水分仪1、控制水喷头2及出口水分仪3。对各段时间作如下规定：Figure 1 shows the flow chart of shredded tobacco passing through the equipment. The shredded tobacco passes through the inlet moisture meter 1, the control water nozzle 2 and the outlet moisture meter 3 sequentially from the shredded tobacco moisture regaining device. The following provisions are made for each period of time:
A段时间：在正常运行的条件下，在入口水分仪1的下方放入标志物的同时开始计时，到HXD的入口处停止计时，连续三次并取平均值。A period of time: Under normal operating conditions, start timing when markers are placed under the inlet moisture meter 1, stop timing at the entrance of HXD, and take the average value for three consecutive times.
确定该段时间的意义是：确定入口水分仪1下方的烟丝(烟丝水分数据记录)到达控制水喷头2处的时间，把被测烟丝的水分数据保存并延时，延时的时间就是烟丝从入口水分仪1到达HXD入口处(控制水喷头2的上方)。当水分数据到达延时时间后，取出烟丝水分数据与HXD设定值比较计算得到水分的波动值。用于控制水设定值叠加量的计算。The significance of determining this period of time is to determine the time when the shredded tobacco (cut tobacco moisture data record) below the inlet moisture meter 1 reaches the control water nozzle 2, and save and delay the moisture data of the shredded tobacco measured. The inlet moisture meter 1 reaches the HXD inlet (above the control water nozzle 2). When the moisture data reaches the delay time, take out the cut tobacco moisture data and compare it with the HXD set value to calculate the moisture fluctuation value. Used to control the calculation of the water setpoint superimposed amount.
B段时间：HXD在待料状态，将烟丝放入HXD的入口处开始计时，当烟丝从HXD的出口处排出到达出口水分仪2处停止计时，连续十次并取平均值。Time B: When HXD is in the waiting state, put the shredded tobacco into the inlet of HXD and start timing. When the shredded tobacco is discharged from the outlet of HXD and reaches the exit moisture meter 2, stop timing, and take ten consecutive times and take the average value.
确定该段时间的意义是：确定控制水喷头2上方的烟丝到达HXD出口水分仪3下方的时间，B段时间确定用于在HXD出口水分的接近设定值和到达设定值时，判断调整的时间。The significance of determining this period of time is: to determine the time for controlling the shredded tobacco above the water nozzle 2 to reach the bottom of the HXD outlet moisture meter 3, and to determine the time period B for judging and adjusting when the moisture at the HXD outlet is close to the set value and when it reaches the set value time.
通过以下步骤对设备出口水分稳定性进行控制：Control the moisture stability at the outlet of the equipment through the following steps:
(1).对HXD的入口水分仪1进行数据采集，将数据保存并延时到实际物料到达控制水喷头2的上方时，将此数据与HXD入口水分设定值的差值按一定比例(比例范围一般在0.5-1.0之间)叠加在控制水的设定值上来消除来料水分波动对出口烟丝水分的影响。(1). Collect data from the inlet moisture meter 1 of HXD, save the data and delay until the actual material reaches the top of the control water nozzle 2, and calculate the difference between this data and the HXD inlet moisture setting value according to a certain ratio ( The proportion range is generally between 0.5-1.0) superimposed on the set value of the control water to eliminate the influence of the moisture fluctuation of the incoming material on the moisture of the outlet tobacco.
(2).在HXD出口烟丝的水分远离设定值时(＞|±0.45％|HXD出口水分设定值)，通过控制水PID(P比例，I积分，D微分调节器)迅速控制加水量来使设备出口的水分回到正常范围内。(2). When the moisture of cut tobacco at the HXD outlet is far from the set value (>|±0.45%|HXD outlet moisture set value), quickly control the amount of water added by controlling the water PID (P proportional, I integral, D differential regulator) To make the moisture at the outlet of the equipment return to the normal range.
(3).在HXD出口烟丝水分相对接近设定值时(＜|±0.3％|HXD出口水分设定值)，对控制水的设定值先保持不变，保持时间为在控制水喷头2上方的烟丝到达HXD出口水分仪3下方所经过的时间(B段时间)，当这些烟丝到达HXD出口水分仪3的下方时对设备出口烟丝水分进行数据采集并计算出平均值，来判断加水量是否合适，对加水量进行适当的修正。(3). When the cut tobacco moisture at the HXD outlet is relatively close to the set value (<|±0.3%|HXD outlet moisture set value), the set value of the control water is kept unchanged first, and the holding time is at the control water nozzle 2 The elapsed time for the shredded tobacco at the top to reach the bottom of the HXD outlet moisture meter 3 (time B), when these shredded tobacco reaches the bottom of the HXD outlet moisture meter 3, the data of the shredded tobacco moisture at the outlet of the equipment is collected and the average value is calculated to determine the amount of water added Whether it is appropriate, make appropriate corrections to the amount of water added.
(4).在HXD出口烟丝水分到达设定值时，保持控制水调节阀的开度，经过延时(B段时间)再采集设备出口水分进行判断。进入下一个控制循环。(4). When the cut tobacco moisture at the HXD outlet reaches the set value, keep the opening of the control water regulating valve, and after a delay (B section time), collect the moisture at the outlet of the equipment for judgment. Enter the next control loop.
图2给出了本发明的控制程序框图。其中：Fig. 2 has provided the control program block diagram of the present invention. in:
SP：在线膨胀设备HXD出口烟丝水分的设定值，用％(烟丝的含水率)表示。SP: The set value of moisture content of shredded tobacco at the outlet of online expansion device HXD, expressed in % (moisture content of shredded tobacco).
PV：HXD出口烟丝水分的测量值，用％表示。PV: The measured value of the moisture content of HXD outlet cut tobacco, expressed in %.
Sp now：计算出新的控制水量的设定值，用L/H(升/小时)表示。Sp now: Calculate the new setting value of the control water volume, expressed in L/H (liter/hour).
Sp old：上一次计算出的控制水量的设定值，用L/H(升/小时)表示。Sp old: The set value of the control water volume calculated last time, expressed in L/H (liter/hour).
Factor：控制水量的控制幅度(经验值)。Factor: Control range of water volume (experience value).
moisture Sp和moisture Pv：HXD出口水分的设定值和测量值。用％表示。moisture Sp and moisture Pv: set value and measured value of HXD outlet moisture. Expressed in %.
30秒：B段时间(控制水喷头上方的烟丝到达HXD出口水分仪下方的所经过的时间)使用以上控制方式与原控制方式比较，水分的合格率提高20％以上。30 seconds: Time B (the time it takes for the shredded tobacco above the water nozzle to reach the bottom of the HXD outlet moisture meter) using the above control method compared with the original control method, the qualified rate of moisture is increased by more than 20%.
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| Application Number | Priority Date | Filing Date | Title |
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| 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 |
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| 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 |
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| CN1692844A CN1692844A (en) | 2005-11-09 |
| CN100355373C true CN100355373C (en) | 2007-12-19 |
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| 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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| 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 Corp. Address before: Licheng District 250100 Shandong city of Ji'nan Province General Road No. 80 Applicant before: General Tobacco Group Co.,Ltd. |
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