CN103211284A - Low-oxygen drying method and device for pneumatic drying of tobacco - Google Patents
Low-oxygen drying method and device for pneumatic drying of tobacco Download PDFInfo
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- CN103211284A CN103211284A CN2013101383196A CN201310138319A CN103211284A CN 103211284 A CN103211284 A CN 103211284A CN 2013101383196 A CN2013101383196 A CN 2013101383196A CN 201310138319 A CN201310138319 A CN 201310138319A CN 103211284 A CN103211284 A CN 103211284A
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- drying
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Abstract
The invention discloses a low-oxygen drying method and device for pneumatic drying of tobacco. According to the low-oxygen drying method and device for the pneumatic drying of the tobacco, a pressure detector and an oxygen content detector are installed on a pneumatic drying device, a damp discharging valve is installed on a damp discharging pipeline, a steam injection device is installed on a pipeline extending into a hot blast stove, an interlocking control relation of the pressure P detected by the pressure detector, the oxygen content O2 detected by the oxygen content detector, the steam injection flow Q and the open degree of the damp discharging valve is established through a control system, and the oxygen content of the system is adjusted by the changing of the steam injection amount or the changing of the pressure value of the system. According to the low-oxygen drying method and device for the pneumatic drying of the tobacco, low-oxygen drying control of a pneumatic drying process of the tobacco can be achieved, the oxygen content of the system is adjusted through two regulating variables, odor of the dried tobacco can be effectively controlled, and safe running of the device is guaranteed. The low-oxygen drying device for the pneumatic drying of the tobacco is simple in structure and reliable in operation.
Description
Technical field
The present invention relates to a kind of processing method of Tobacco drying, particularly relate to and a kind of tobacco is carried out the hypoxemia drying means of pneumatic conveying drying, the invention still further relates to the device of this method of realization.
Background technology
Tobacco drying is that tobacco is processed indispensable link, and its treatment effect is most important to the flavour absorbing quality of tobacco, and particularly the height of the air-flow oxygen content of tobacco gas fluidized drying system is very big to the taste influence of energy consumption, fire hidden danger and the tobacco of equipment operation.
At present common pneumatic conveying dryer or have only air-flow oxygen content control device, or have only the pressure control device of system airflow, the oxygen content of system be because the influencing factor complexity, control slowly, so generally do not adopt the oxygen content control method.Control system pressure can be controlled the cold air amount of the system that enters, thereby influence the energy consumption of system, but pressure is too small, can influence the ability of discharging tobacco, the simultaneity factor oxygen content increases, owing to be the high temperature gas flow drying, too high oxygen content can influence taste even the breaking out of fire hidden danger of dry back tobacco; Excessive system airflow pressure can influence the ability that tobacco enters system, and these two kinds of control methods are chosen any one kind of them and all are difficult to reach ideal control effect.
Summary of the invention
First technical problem that the present invention solves provides a kind of processing stability height, controllability are carried out the tobacco gas fluidized drying of high temperature gas flow drying preferably to pipe tobacco hypoxemia drying means.
Second technical problem that the present invention solves provides a kind of simple in structure, device that the hypoxemia drying means of this tobacco gas fluidized drying is realized on dependable performance ground.
For solving above-mentioned first technical problem, the hypoxemia drying means of the tobacco gas fluidized drying that the present invention adopts, setting pressure detector, oxygen content detector and steam injection equipment in the pneumatic conveying drying system, the humidity discharging valve is installed, the oxygen content O that the pressure P that control system detects pressure detector, oxygen content detector detect on exhausting moisture pipeline
2Steam injection flow Q and humidity discharging valve opening are set up chain control relation, adopt to change the steam emitted dose or change the system pressure value and come the regulating system oxygen content, if oxygen content superelevation or on the low side, progressively increase at first within the specific limits or reduce the steam emitted dose and regulate oxygen content, if the steam emitted dose reaches maximum or minimum of a value and oxygen content and still exceeds standard, then the steam emitted dose is stabilized in maximum or minimum of a value, then adopt the mode that changes measuring point pressure to regulate oxygen content, measuring point pressure reaches minimizing or the additional air quantity purpose of increase is regulated oxygen content thereby progressively increase within the specific limits or reduce, if it is maximum or minimum that the pressure controlling value reaches, then send the equipment fault alarm signal.
Its concrete steps are: the first step: in control system the pressure controlled upper limit is set, lower limit is respectively P
H, P
L, and P
L＜P
H＜0, pressure controlled step pitch △ P is set; Upper control limit, lower limit that oxygen content is set are respectively O
2H, O
2LThe upper limit, the lower limit Q of steam injection flow are set
H, Q
L, the adjusting step pitch △ Q of steam injection flow is set; Second step: the pressure controlling value P that the pressure detector place is set before the production
0, and P
H＞P
0＞P
L, steam is set sprays initial flow Q
0, and Q
H＞Q
0＞Q
L, after the equipment operation, the humidity discharging valve is controlled at P with the pressure actual value at pressure detector place automatically
0Near, steam control valve is controlled at Q with steam flow
0Near; The 3rd step: the oxygen content detector detects the oxygen content actual value O of measuring point
2, if O
2H＞O
2＞O
2L, steam injection flow Q then
0With pressure controlling value P
0Remain unchanged; The 4th step: if O
2＞O
2H, then every time cycle t
1After with the steam injection flow at Q
0The basis on increase △ Q, until O
2H＞O
2＞O
2L, steam flow is no longer adjusted, if after a period of time, and steam injection flow Q=Q
H, then steam injection flow Q is stabilized in Q
HNear, then every time cycle t
2After with pressure controlling value P at P
0The basis on increase △ P, to reduce the new wind magnitude of recruitment from system outside, up to O
2H＞O
2＞O
2L, the pressure controlling value is no longer adjusted, if after a period of time, and pressure controlling value P=P
H, then sending the equipment fault alarm signal, the prompting technical staff checks; The 5th step: if O
2＜O
2L, then every time cycle t
1After with the steam injection flow at Q
0The basis on reduce △ Q, until O
2H＞O
2＞O
2L, steam flow is no longer adjusted, if after a period of time, and steam injection flow Q=Q
L, then steam injection flow Q is stabilized in Q
LNear, then every time cycle t
2After with pressure controlling value P at P
0The basis on reduce △ P, to increase the new wind magnitude of recruitment from system outside, up to O
2H＞O
2＞O
2L, the pressure controlling value is no longer adjusted, if after a period of time, and pressure controlling value P=P
L, then sending the equipment fault alarm signal, the prompting technical staff checks.
In order to solve second technical problem, the device of the hypoxemia drying means of realization tobacco gas provided by the invention fluidized drying, comprise the pneumatic conveying drying system, described pneumatic conveying drying system comprises discharging gas lock, blower fan, exhausting moisture pipeline and hot-blast stove, described pneumatic conveying drying system is provided with pressure detector and oxygen content detector, the humidity discharging valve is installed on the described exhausting moisture pipeline, and described pneumatic conveying drying system one is connected with the vapor injection system of control oxygen content.
Described pressure detector is installed on the process gas flow pipeline that described feeding gas is locked to described fans entrance.
Described pressure detector is installed in the described charging gas lock below or the described discharging gas lock top position of process gas flow process.
Described oxygen content detector is installed in the entry position of the described discharging gas lock of process gas flow process to described blower fan.
Described steam injection equipment is installed in described exhausting moisture pipeline to the process gas flow pipeline of described hot-blast stove inlet.
Described steam injection equipment comprises steam reducing valve, steam-flow meter and steam control valve most.
Adopt the hypoxemia drying means and the device of the tobacco gas fluidized drying of technique scheme, pneumatic conveying drying process to tobacco realizes the dry control of hypoxemia, the invention provides system pressure, steam injection flow control range and oxygen content permission fluctuation range, adopted control of steam injection flow and measuring point pressure to control the oxygen content of regulating system, if system's oxygen content does not exceed tolerance band, measuring point pressure and steam injection flow will remain unchanged, if system's oxygen content exceeds tolerance band, then increase and decrease according to direction steam regulation injection flow time and the amplitude according to the rules that exceeds, until the steam injection flow reaches extreme value, then further regulating system measuring point pressure controlling value, according to the rules time and amplitude increase and decrease, if measuring point pressure controlling value reaches extreme value, then system sends fault warning.
The present invention and device have overcome the defective that can only select a kind of mode regulating system oxygen content under original cooked mode, can not finely take into account system's oxygen content and replenish the accent of the cold air amount of the system that enters, the present invention has adopted two regulated quantitys to come the regulating system oxygen content, preferably system's oxygen content is adjusted at tolerance band having taken into account preferably outside the various processing indexs, thereby effectively control the suction flavor behind the Tobacco drying, guarantee equipment safety operation.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: the 1-hot-blast stove; The 2-steam control valve; The 3-steam-flow meter; The 4-steam reducing valve; 5-humidity discharging valve; The 6-blower fan; 7-oxygen content detector; The 8-deduster; The 9-pressure detector; The 10-gas-material separator; The 11-drier; 12-discharging gas lock; 13-charging gas lock; The 14-exhausting moisture pipeline.
The specific embodiment
The present invention is further described below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1, the pneumatic conveying drying system comprises charging gas lock 13, drier 11, gas-material separator 10, discharging gas lock 12, deduster 8, blower fan 6 and hot-blast stove 1, pressure detector 9 is installed in the pneumatic conveying drying system, oxygen content detector 7, the vapor injection system of the humidity discharging valve 5 of control system pressure and control oxygen content, wherein pressure detector 9 can be installed in the charging gas lock 13 of pneumatic conveying drying system to the process gas flow pipeline of blower fan 6 inlets, be preferably mounted at charging gas lock 13 belows or discharging gas lock 12 top positions of process gas flow process, oxygen content detector 7 is preferably mounted at the discharging gas lock 12 of process gas flow process to blower fan 6 entry positions, humidity discharging valve 5 is installed in the exhausting moisture pipeline 14, steam injection equipment is installed in exhausting moisture pipeline 14 to the process gas flow pipeline of hot-blast stove 1 inlet, and steam injection equipment comprises steam reducing valve 4 most, steam-flow meter 3 and steam control valve 2.Pressure detector 9, oxygen content detector 7, steam-flow meter 3, control valve 2 and humidity discharging valve 5 be access control system all.
Referring to Fig. 1, the pressure P that pressure detector 9 is detected by control system, the oxygen content O that oxygen content detector 7 detects
2, steam injection flow Q and humidity discharging valve 5 apertures set up chain control relation.The steps include: the first step: in control system the pressure controlled upper limit is set, lower limit is respectively P
H, P
L, and P
L＜P
H＜0, pressure controlled step pitch △ P is set; Upper control limit, lower limit that oxygen content is set are respectively O
2H, O
2LThe upper limit, the lower limit Q of steam injection flow are set
H, Q
L, the adjusting step pitch △ Q of steam injection flow is set; Second step: the pressure controlling value P that the pressure detector place is set before the production
0, and P
H＞P
0＞P
L, steam is set sprays initial flow Q
0, and Q
H＞Q
0＞Q
L, after the equipment operation, humidity discharging valve 5 is controlled at P with the pressure actual value at pressure detector place automatically
0Near, steam control valve 2 is controlled at Q with steam flow
0Near; The 3rd step: oxygen content detector 7 detects the oxygen content actual value O of measuring point
2, if O
2H＞O
2＞O
2L, steam injection flow Q then
0With pressure controlling value P
0Remain unchanged; The 4th step: if O
2＞O
2H, then every time cycle t
1After with the steam injection flow at Q
0The basis on increase △ Q, until O
2H＞O
2＞O
2L, steam flow is no longer adjusted, if after a period of time, and steam injection flow Q=Q
H, then steam injection flow Q is stabilized in Q
HNear, then every time cycle t
2After with pressure controlling value P at P
0The basis on increase △ P, to reduce the new wind magnitude of recruitment from system outside, up to O
2H＞O
2＞O
2L, the pressure controlling value is no longer adjusted, if after a period of time, and pressure controlling value P=P
H, then sending the equipment fault alarm signal, the prompting technical staff checks; The 5th step: if O
2＜O
2L, then every time cycle t
1After with the steam injection flow at Q
0The basis on reduce △ Q, until O
2H＞O
2＞O
2L, steam flow is no longer adjusted, if after a period of time, and steam injection flow Q=Q
L, then steam injection flow Q is stabilized in Q
LNear, then every time cycle t
2After with pressure controlling value P at P
0The basis on reduce △ P, to increase the new wind magnitude of recruitment from system outside, up to O
2H＞O
2＞O
2L, the pressure controlling value is no longer adjusted, if after a period of time, and pressure controlling value P=P
L, then sending the equipment fault alarm signal, the prompting technical staff checks.
Claims (8)
1. the hypoxemia drying means of a tobacco gas fluidized drying, it is characterized in that: setting pressure detector, oxygen content detector and steam injection equipment in the pneumatic conveying drying system, the humidity discharging valve is installed, the oxygen content O that the pressure P that control system detects pressure detector, oxygen content detector detect on exhausting moisture pipeline
2Steam injection flow Q and humidity discharging valve opening are set up chain control relation, adopt to change the steam emitted dose or change the system pressure value and come the regulating system oxygen content, if oxygen content superelevation or on the low side, progressively increase at first within the specific limits or reduce the steam emitted dose and regulate oxygen content, if the steam emitted dose reaches maximum or minimum of a value and oxygen content and still exceeds standard, then the steam emitted dose is stabilized in maximum or minimum of a value, then adopt the mode that changes measuring point pressure to regulate oxygen content, measuring point pressure reaches minimizing or the additional air quantity purpose of increase is regulated oxygen content thereby progressively increase within the specific limits or reduce, if it is maximum or minimum that the pressure controlling value reaches, then send the equipment fault alarm signal.
2. according to the hypoxemia drying means of the described tobacco gas fluidized drying of right, it is characterized in that: concrete steps are: the first step: in control system the pressure controlled upper limit is set, lower limit is respectively P
H, P
L, and P
L＜P
H＜0, pressure controlled step pitch △ P is set; Upper control limit, lower limit that oxygen content is set are respectively O
2H, O
2LThe upper limit, the lower limit Q of steam injection flow are set
H, Q
L, the adjusting step pitch △ Q of steam injection flow is set; Second step: the pressure controlling value P that the pressure detector place is set before the production
0, and P
H＞P
0＞P
L, steam is set sprays initial flow Q
0, and Q
H＞Q
0＞Q
L, after the equipment operation, the humidity discharging valve is controlled at P with the pressure actual value at pressure detector place automatically
0Near, steam control valve is controlled at Q with steam flow
0Near; The 3rd step: the oxygen content detector detects the oxygen content actual value O of measuring point
2, if O
2H＞O
2＞O
2L, steam injection flow Q then
0With pressure controlling value P
0Remain unchanged; The 4th step: if O
2＞O
2H, then every time cycle t
1After with the steam injection flow at Q
0The basis on increase △ Q, until O
2H＞O
2＞O
2L, steam flow is no longer adjusted, if after a period of time, and steam injection flow Q=Q
H, then steam injection flow Q is stabilized in Q
HNear, then every time cycle t
2After with pressure controlling value P at P
0The basis on increase △ P, to reduce the new wind magnitude of recruitment from system outside, up to O
2H＞O
2＞O
2L, the pressure controlling value is no longer adjusted, if after a period of time, and pressure controlling value P=P
H, then sending the equipment fault alarm signal, the prompting technical staff checks; The 5th step: if O
2＜O
2L, then every time cycle t
1After with the steam injection flow at Q
0The basis on reduce △ Q, until O
2H＞O
2＞O
2L, steam flow is no longer adjusted, if after a period of time, and steam injection flow Q=Q
L, then steam injection flow Q is stabilized in Q
LNear, then every time cycle t
2After with pressure controlling value P at P
0The basis on reduce △ P, to increase the new wind magnitude of recruitment from system outside, up to O
2H＞O
2＞O
2L, the pressure controlling value is no longer adjusted, if after a period of time, and pressure controlling value P=P
L, then sending the equipment fault alarm signal, the prompting technical staff checks.
3. realize the device of the hypoxemia drying means of the described tobacco gas fluidized drying of claim 1, comprise the pneumatic conveying drying system, described pneumatic conveying drying system comprises discharging gas lock (12), blower fan (6), exhausting moisture pipeline (14) and hot-blast stove (1), it is characterized in that: described pneumatic conveying drying system is provided with pressure detector (9) and oxygen content detector (7), humidity discharging valve (5) is installed on the described exhausting moisture pipeline (14), and described pneumatic conveying drying system is connected with the vapor injection system of control oxygen content.
4. the device of the hypoxemia drying means of realization tobacco gas according to claim 3 fluidized drying is characterized in that: described pressure detector (9) is installed in described charging gas lock (13) to the process gas flow pipeline of described blower fan (6) inlet.
5. according to the device of the hypoxemia drying means of claim 3 or 4 described realization tobacco gas fluidized dryings, it is characterized in that: described pressure detector (9) is installed in described charging gas lock (13) below or described discharging gas lock (12) top position of process gas flow process.
6. according to the device of the hypoxemia drying means of claim 3 or 4 described realization tobacco gas fluidized dryings, it is characterized in that: described oxygen content detector (7) is installed in the entry position of the described discharging gas lock (12) of process gas flow process to described blower fan (6).
7. according to the device of the hypoxemia drying means of claim 3 or 4 described realization tobacco gas fluidized dryings, it is characterized in that: described steam injection equipment is installed in described exhausting moisture pipeline (14) to the process gas flow pipeline of described hot-blast stove (1) inlet.
8. according to the device of the hypoxemia drying means of claim 3 or 4 described realization tobacco gas fluidized dryings, it is characterized in that: described steam injection equipment comprises steam reducing valve (4), steam-flow meter (3) and steam control valve (2) most.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101383196A CN103211284A (en) | 2013-04-19 | 2013-04-19 | Low-oxygen drying method and device for pneumatic drying of tobacco |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101383196A CN103211284A (en) | 2013-04-19 | 2013-04-19 | Low-oxygen drying method and device for pneumatic drying of tobacco |
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| Publication Number | Publication Date |
|---|---|
| CN103211284A true CN103211284A (en) | 2013-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101383196A Pending CN103211284A (en) | 2013-04-19 | 2013-04-19 | Low-oxygen drying method and device for pneumatic drying of tobacco |
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| Country | Link |
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| CN (1) | CN103211284A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110115393A (en) * | 2019-06-11 | 2019-08-13 | 红云红河烟草(集团)有限责任公司 | A kind of hypoxemia redrying technique |
| CN113349399A (en) * | 2021-06-18 | 2021-09-07 | 福建中烟工业有限责任公司 | Method and system for controlling airflow drying equipment to dry tobacco shreds |
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| US3985145A (en) * | 1973-08-10 | 1976-10-12 | Hauni-Werke Korber & Co., Kg | Method and apparatus for changing the moisture content of tobacco |
| WO1989008407A1 (en) * | 1988-03-19 | 1989-09-21 | Gbe International Plc | Rotary cylinder drier |
| US20040205978A1 (en) * | 2001-11-26 | 2004-10-21 | Yasuhiro Ohdaka | Flash dryer for particulate materials |
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| CN101480271A (en) * | 2009-02-13 | 2009-07-15 | 湖南中烟工业有限责任公司 | Method and device for carrying drum-type drying and accurate processing of tobacco shred |
| CN201774946U (en) * | 2010-08-06 | 2011-03-30 | 福建中烟工业公司 | Oxygen content detecting system |
| US20120279081A1 (en) * | 2009-08-26 | 2012-11-08 | Ji International, S.A. | Device and method for processing tobacco |
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2013
- 2013-04-19 CN CN2013101383196A patent/CN103211284A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3985145A (en) * | 1973-08-10 | 1976-10-12 | Hauni-Werke Korber & Co., Kg | Method and apparatus for changing the moisture content of tobacco |
| WO1989008407A1 (en) * | 1988-03-19 | 1989-09-21 | Gbe International Plc | Rotary cylinder drier |
| US20040205978A1 (en) * | 2001-11-26 | 2004-10-21 | Yasuhiro Ohdaka | Flash dryer for particulate materials |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110115393A (en) * | 2019-06-11 | 2019-08-13 | 红云红河烟草(集团)有限责任公司 | A kind of hypoxemia redrying technique |
| CN110115393B (en) * | 2019-06-11 | 2021-09-28 | 红云红河烟草(集团)有限责任公司 | Low-oxygen redrying process |
| CN113349399A (en) * | 2021-06-18 | 2021-09-07 | 福建中烟工业有限责任公司 | Method and system for controlling airflow drying equipment to dry tobacco shreds |
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Application publication date: 20130724 |