CN104865828B - A kind of control method of pneumatic drying outlet material water ratio - Google Patents
A kind of control method of pneumatic drying outlet material water ratio Download PDFInfo
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- CN104865828B CN104865828B CN201510132475.0A CN201510132475A CN104865828B CN 104865828 B CN104865828 B CN 104865828B CN 201510132475 A CN201510132475 A CN 201510132475A CN 104865828 B CN104865828 B CN 104865828B
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Abstract
The invention discloses a kind of control method of pneumatic drying outlet material water ratio, the test point of pneumatic drying outlet material water ratio is arranged on the electronic scale after the wind after pneumatic conveying drying is sent, the material thickness on dress gauge line control electronic scale on the feeder of mouth is sent out in wind simultaneously, make the detected value of Moisture Meter consistent with pneumatic drying outlet material water ratio, increase the control precision of Optimization of Gas Flow Drying material water ratio.
Description
Technical field
The present invention relates in tobacco manufacturing enterprise material pneumatic dry outlet material water ratio control method, specifically
It is a kind of control method of pneumatic drying outlet material water ratio.
Background technology
The control and regulation of pneumatic drying outlet material water ratio are to control adjust automatically pneumatic conveying drying to enter by drying program
Mouth mass flow is realized, dries entrance Moisture Meter and dry moisture content of outlet instrument is detected after material water ratio, moisture content is according to biography
Drying control program is defeated by, by calculating, adjust automatically pneumatic conveying drying entrance mass flow is realized out by mass flow regulation
Mouth material water ratio regulation, prior art is arranged on pneumatic drying outlet for the test point of pneumatic drying outlet material water ratio
At 30cm, control flow is as shown in Figure 1.
The shortcoming of prior art is：
1. pneumatic drying outlet Moisture Meter test point is located at pneumatic drying outlet, pneumatic drying outlet temperature of charge is higher,
More than 50 DEG C, and it is influenced by environmental temperature, Moisture Meter detection process is influenceed by material temperature, and detected value and true material are aqueous
Rate deviation is big；
2. pneumatic drying outlet material thickness is influenceed by mass flow, mass flow always is fluctuation, Moisture Meter detection
The material thickness of point is uneven, and the detected value of Moisture Meter and real material water ratio deviation are big；
3. Moisture Meter is influenceed truly reflect the moisture content of outlet material in real time by two above factor, drying is transferred to
The material water ratio value of process control block (PCB) is false, and drying process control program provides the tune of pneumatic conveying drying entrance electronic scale
The signal of amount of restriction can also have deviation therewith, and the control accuracy to outlet material water ratio is not high, causes pneumatic drying outlet
Material water ratio frequent fluctuation, the qualification rate of outlet material water ratio is low；
4. material is after wind is sent, wind passes through journey to be influenceed by ambient humidity, and wind passes through journey material water when ambient humidity is low
Scattered to lose, material water ratio reduces, material moisture absorption during ambient humidity Gao Shifeng is sent, material water ratio increase, such feelings
The material water ratio that condition results in rear process is fluctuated with the change of ambient humidity, to material water ratio in the manufacturing process of rear process
Control bring larger difficulty.
The content of the invention
It is an object of the invention to for above-mentioned the deficiencies in the prior art, there is provided a kind of pneumatic drying outlet material
The control method of moisture content, can effectively solve to go out the big caused drying control journey of material water ratio value detection error by pneumatic conveying drying
Sequence adjusts mass flow deviation, causes pneumatic drying outlet material water ratio to fluctuate big problem.The present invention can steady air flow drying
Outlet material water ratio, makes the control of pneumatic drying outlet material water ratio more accurate, improves pneumatic drying outlet material aqueous
Process material water ratio qualification rate, stabilized product quality after rate qualification rate, raising.
The technical solution adopted in the present invention is:
A kind of control method of pneumatic drying outlet material water ratio, the electronic scale feeder upper, middle and lower of mouth are sent out in wind
Position installs gauge line additional, and material temperature of charge after wind passes through journey is reduced, fallen on electronic scale, control material thickness makes electricity
Material thickness is uniform on sub- scale, is detected by Moisture Meter, detected value is transferred into drying program, and drying program is accurately adjusted
Pneumatic conveying drying entrance mass flow, makes outlet material water ratio stably reach technological standards requirement.
Pneumatic drying outlet material water ratio is controlled with existing pneumatic drying outlet material water ratio control method, in air-flow
Outlet material water ratio technological standards are dried under 12.6 ± 1.0% technological requirement, pneumatic drying outlet material water ratio is qualified
Rate is 91.07%, and after present invention application, the problem of solving temperature of charge and uneven material thickness enables Moisture Meter exactly
The moisture content of material is detected, drying process control program can be fed back to exactly, makes drying control program to mass flow
Regulation is more accurate, and in the case of the requirement of identical technological standards, pneumatic drying outlet material moisture qualification rate is promoted to
99.89%；Moisture Meter test point is arranged on after wind send, can make wind send during material water ratio change it is unified by drying program
Material water ratio is controlled, the material water ratio of rear process, stabilized product quality is stabilized.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of prior art；
Fig. 2 is schematic flow sheet of the invention.
Embodiment
Below in conjunction with the accompanying drawings 2 and specific embodiment the invention will be further described.
Sent as shown in Fig. 2 pneumatic drying outlet Moisture Meter test point is moved into wind from pneumatic drying outlet on rear electronic scale,
Temperature of charge is reduced after wind passes through journey, solves the problems, such as that temperature influences Moisture Meter detected value, test point is arranged on wind and sends out mouth
Electronic scale on, wind send out mouth feeder upper, middle and lower position install gauge line additional, control material thickness makes thing on electronic scale
Expect that thickness is uniform, solve the problems, such as that material thickness influences Moisture Meter detected value.So Moisture Meter can truly reflect material water ratio,
The material water ratio value for being transferred to drying program is accurate, and program can accurately adjust pneumatic conveying drying entrance mass flow, make outlet
Material water ratio stably reaches technological standards requirement, process material moisture qualification rate after raising.
Embodiment one：Pneumatic drying outlet material water ratio technological standards are 12.6 ± 1.0%, pneumatic conveying drying entrance material
Flow is 3045kg/h, and pneumatic conveying drying entrance material water ratio is 35.87%, and outlet material water ratio is 12.37%, and moisture content is low
Central value is required in technological standards, drying control program calculates adjustment pneumatic conveying drying entrance mass flow automatically, by entrance material
Flow is adjusted to 3055kg/h, after flow adjustment, and pneumatic drying outlet material water ratio is 12.59%.
Embodiment two：Pneumatic drying outlet material water ratio technological standards are 12.6 ± 1.0%, pneumatic conveying drying entrance material
Flow is 2977kg/h, and pneumatic conveying drying entrance material water ratio is 36.0%, and outlet material water ratio is 12.84%, and moisture content is high
Central value is required in technological standards, drying control program calculates adjustment pneumatic conveying drying entrance mass flow automatically, by entrance material
Flow is adjusted to 2949kg/h, after flow adjustment, and pneumatic drying outlet material water ratio is 12.54%.
Claims (2)
1. a kind of control method of pneumatic drying outlet material water ratio, it is characterised in that step is as follows：The electricity of mouth is sent out in wind
Moisture Meter is set on sub- scale, gauge line is installed additional at feeder upper, middle and lower position, material temperature after wind passes through journey is reduced, fallen
Onto electronic scale, control material thickness makes material thickness on electronic scale uniformly, be detected by Moisture Meter, detected value is passed
Drying control program is defeated by, while the detected value for drying entrance Moisture Meter is transferred into drying control program, drying control program
Accurate adjustment pneumatic conveying drying entrance mass flow, makes pneumatic drying outlet material water ratio stably reach technological standards requirement.
2. the control method of pneumatic drying outlet material water ratio according to claim 1, it is characterised in that pneumatic conveying drying
Entrance mass flow is 2977-3045kg/h, and pneumatic conveying drying entrance material water ratio is 35.87-36.0%, pneumatic drying outlet
Material water ratio technological standards are 12.6 ± 1.0%, and outlet material water ratio is 12.37-12.84%, when moisture content is less than work
Skill standard requires central value, and drying control program calculates adjustment pneumatic conveying drying entrance mass flow automatically, by entrance mass flow
2949-3055kg/h is adjusted to, after flow adjustment, pneumatic drying outlet material water ratio is 12.54-12.59%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510132475.0A CN104865828B (en) | 2015-03-25 | 2015-03-25 | A kind of control method of pneumatic drying outlet material water ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510132475.0A CN104865828B (en) | 2015-03-25 | 2015-03-25 | A kind of control method of pneumatic drying outlet material water ratio |
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| CN104865828A CN104865828A (en) | 2015-08-26 |
| CN104865828B true CN104865828B (en) | 2017-10-03 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106805282A (en) * | 2017-02-16 | 2017-06-09 | 红塔烟草(集团)有限责任公司 | A kind of method for controlling water content of chimneying formula dried material |
| CN111375549B (en) * | 2018-12-28 | 2022-05-03 | 贵州中烟工业有限责任公司 | Tobacco winnowing equipment and secondary winnowing flow measuring method, device and equipment thereof |
| CN112014550B (en) * | 2020-08-24 | 2023-03-31 | 湖南中联重科混凝土机械站类设备有限公司 | Method and device for detecting moisture content of aggregate and machine-readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1327801C (en) * | 2005-04-27 | 2007-07-25 | 玉溪金灿科技有限公司 | Technological process of grouping tobacco sheet and fine making tobacco shreds |
| CN102486630B (en) * | 2010-12-05 | 2013-10-23 | 中国科学院沈阳自动化研究所 | Case reasoning technology-based damping machine intelligent optimized control method |
| CN102511914A (en) * | 2011-12-29 | 2012-06-27 | 红云红河烟草(集团)有限责任公司 | Method for accurately controlling water content in tobacco processing |
| CN103610226A (en) * | 2013-12-16 | 2014-03-05 | 福建中烟工业有限责任公司 | Moisture content controlling method for tobacco airflow drying |
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