CN205284969U - SDT stalk silk drying tower air return temperature controlling means - Google Patents
SDT stalk silk drying tower air return temperature controlling means Download PDFInfo
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- CN205284969U CN205284969U CN201521087317.XU CN201521087317U CN205284969U CN 205284969 U CN205284969 U CN 205284969U CN 201521087317 U CN201521087317 U CN 201521087317U CN 205284969 U CN205284969 U CN 205284969U
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Abstract
The utility model discloses a SDT stalk silk drying tower air return temperature controlling means, including fan (7), material discharge device (11), cyclone (10), arrange damp device (6), drying tower (5), pressure sensor (12), oxygen bearing level sensor (9), technology air stream temperature sensor (18), combustor (4) and control system, install on the feeding technology route of SDT drying tower material sensor (1), install injection water control circuit on technology gas flow tube says the entry position of fan (7) install temperature sensor (8), material sensor (1) and temperature sensor (8) with control system communication connection control system in set up the temperature setting value T of temperature sensor (8) measurement station, this measurement station temperature 10 -20 degree when temperature setting value T is higher than normal production process. The utility model relates to an effectively prevent the on fire and simple structure of SDT stalk silk drying tower, control simple and convenient SDT stalk silk drying tower air return temperature controlling means.
Description
Technical field
This utility model relates to a kind of SDT stem drying tower return air temperature and controls device, exactly relates to a kind of SDT stem drying tower and prevents control device on fire.
Background technology
The operation principle of SDT stem drying tower is: be connected with high-temperature technology air-flow in cut-tobacco drier, air-flow adopts blower fan 7 to drive, high temperature gas flow and the material counter current contact entered by Venturi tube, there is strong heat and mass transport process, make the moisture rapid vaporization within stem, the mixture of air-flow and tobacco together enters drying tower 5 and dries several seconds subsequently, subsequently enter feeder 11 and carry out Conveyance, material discharges system by gas lock, hot-air is aspirated by blower fan 7 after cyclone dust extractor 10 dedusting, moisture is emitted by moisture discharge device 6, remaining major part high temperature gas flow is reheated use by air stove.
Met the requirements by the oxygen content of the air pressure of the aperture control pressure transducer measuring point of control moisture discharge device the measuring point of the oxygen content sensor controlling system further, moisture Control is to realize by controlling the height of desired temperature of process gas flow temperature sensor measuring point, by the actual temperature of process gas flow temperature sensor characterization processes air-flow and compare what the power regulating burner 4 had exported with setting value.
Stem can produce a large amount of dry dust in dry run, and it is readily adsorbed in the wire side of feeder, expand tunnel, at the bottom of tower, inside cyclone dust extractor, at supplied materials stem flow, moisture, temperature, when moisture content of outlet is substantially certain, namely when system drying load is basically unchanged, as long as the process gas flow of system is stable, then enter SDT at stem and present, to the path of the entrance of technique blower fan, the gas field that temperature necessarily decays, this temperature is not above the critical point of tobacco dust burning, but, if supplied materials disappearance suddenly, then drying load sharply tails off suddenly, owing to SDT does not have relevant apparatus to carry out the heat energy of absorption technique air-flow, and the internal wind speed of SDT cut-tobacco drier is quickly, the temperature of process gas flow is controlled there is again very big inertia by air stove, in short time, the heat energy of process gas flow cannot discharge, then stem entrance SDT steeply rises to gas field temperature on the path of the entrance of technique blower fan, the critical point of tobacco dust burning may finally be exceeded, cause fire.
Having fraction formula cut-tobacco drier to adopt simulation water device, when system is without material, injection is equivalent to the water of drying load equivalent, but is likely to when feeding intake and causes the phenomenon that discharging moisture is excessively damp.
Utility model content
Technical problem to be solved in the utility model is just to provide a kind of SDT stem drying tower return air temperature effectively preventing SDT stem drying tower on fire and controls device.
In order to solve above-mentioned technical problem, the SDT stem drying tower return air temperature that this utility model provides controls device, including blower fan, feeder, cyclone dust extractor, moisture discharge device, drying tower, pressure transducer, oxygen content sensor, process gas flow temperature sensor, burner and control system, the feeding process path of SDT drying tower is provided with Material Sensor, process gas flow pipeline is provided with injection water management loop, inlet location at described blower fan is provided with temperature sensor, described Material Sensor, injection water management loop and temperature sensor and described control system communicate to connect, the desired temperature T of described temperature sensor measuring point is set in described control system, this measuring point temperature 10-20 degree when desired temperature T is higher than normal productive process.
Described injection water management loop includes regulating valve, effusion meter, air relief valve, atomizing medium and dual-medium nozzle, and described adjustment valve and effusion meter all access described control system.
After the installation site of described dual-medium nozzle is air stove, before charging aperture and on the process gas flow pipeline of close charging aperture.
Described effusion meter is mass flowmenter or electromagnetic flowmeter.
Described Material Sensor is diffuse-reflectance formula photoswitch.
The SDT stem drying tower return air temperature adopting technique scheme controls device, the feeding process path of SDT drying tower is provided with Material Sensor, process gas flow pipeline is provided with injection water management loop, at fans entrance position mounting temperature sensor, the desired temperature T of temperature sensor measuring point is set in control system, detect that material enters SDT cut-tobacco drier at Material Sensor, then injection water management loop is closed, the temperature of temperature sensor is not controlled, once Material Sensor is not detected by material, PID arithmetic is carried out after then comparing with setting value T according to the actual temperature of temperature sensor detection, regulate the flow in injection water management loop, ensure that the actual temperature of temperature sensor measuring point is near desired temperature T, reach the temperature controlled purpose of process gas flow.
Described injection water management loop includes regulating valve, effusion meter, air relief valve, atomizing medium and dual-medium nozzle, described adjustment valve and the equal access controller of effusion meter, control loop PID arithmetic result according to described temperature sensor and regulate the water flow set point in injection water management loop, detected jet water course amount actual value by described effusion meter and done PID adjustment by regulating valve, it is ensured that the discharge being ejected in process gas flow by dual-medium nozzle meets setting value.
Described injection water management loop is when SDT has material and when Material Sensor detection has charging, according to stem drying tower moisture content of outlet pid control circuit to injection water in process gas flow, controls the dry moisture of stem by a small margin.
This measuring point temperature 10-20 degree when described desired temperature T is higher than normal productive process.
After the installation site of described dual-medium nozzle is air stove, before charging aperture and on the process gas flow pipeline of close charging aperture.
When SDT drying tower does not have charging, the water of certain flow is sprayed in injection water management loop in process gas flow, to suppress the temperature of temperature sensor measuring point in setting value near or below. Eliminate this equipment under original pattern, during without material, enter SDT at stem and steeply rise the hidden danger of the dust that even ignites to gas field temperature on the path of the entrance of technique blower fan. Comparing the mode quantitatively applying simulation water, this device controls the humidity in SDT stem drying tower and return air temperature is more stable, and dry moisture of cut stem qualification rate is higher.
In sum, this utility model is that one effectively prevents SDT stem drying tower on fire and simple in construction, controls easy SDT stem drying tower return air temperature and controls device.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation.
1 Material Sensor; 2 process gas flow by-pass lines; 3 distribution valve; 4-combustor; 5-drying tower; 6-moisture discharge device; 7-blower fan; 8-temperature sensor; 9-oxygen content sensor; 10-cyclone dust extractor; 11-feeder; 12-pressure transducer; 13-atomizing medium; 14-air relief valve; 15-effusion meter; 16-regulates valve; 17-dual-medium nozzle; 18-process gas flow temperature sensor.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this utility model is further illustrated.
Referring to Fig. 1, including blower fan 7, process gas flow by-pass line 2, distribution valve 3, feeder 11, drying tower 5, cyclone dust extractor 10, moisture discharge device 6, pressure transducer 12, oxygen content sensor 9, process gas flow temperature sensor 18 and burner 4, the feeding process path of SDT drying tower is provided with Material Sensor 1, process gas flow pipeline is provided with injection water management loop, injection water management loop includes regulating valve 16, effusion meter 15, air relief valve 14, atomizing medium 13 and dual-medium nozzle 17, regulate valve 16 and the equal access controller of effusion meter 15, effusion meter 15 is mass flowmenter or electromagnetic flowmeter, Material Sensor 1 is diffuse-reflectance formula photoswitch, the installation site of dual-medium nozzle 17 is after air stove, before charging aperture and on the process gas flow pipeline of charging aperture. at blower fan 7 inlet location mounting temperature sensor 8, Material Sensor 1 and temperature sensor 8 communicate to connect with controlling system, this measuring point temperature 10-20 degree when arranging the desired temperature T of temperature sensor 8 measuring point, desired temperature T in control system higher than normal productive process. detect that material enters SDT cut-tobacco drier at Material Sensor 1, then injection water management loop is closed, the temperature of temperature sensor 8 is not controlled, once Material Sensor 1 is not detected by material, PID arithmetic is carried out after then comparing with setting value T according to the actual temperature of temperature sensor 8 detection, regulate the flow in injection water management loop, it is ensured that the actual temperature of temperature sensor 8 measuring point, near desired temperature T, reaches the temperature controlled purpose of process gas flow.
Injection water management loop modulation method is: regulate valve 16 and the equal access controller of effusion meter 15, control loop PID arithmetic result according to temperature sensor 8 and regulate the water flow set point in injection water management loop, detected jet water course amount actual value by effusion meter 15 and done PID adjustment by regulating valve 16, it is ensured that the discharge being ejected in process gas flow by dual-medium nozzle 17 meets setting value.
Injection water management loop is when SDT has material and when Material Sensor detection has charging, according to stem drying tower moisture content of outlet pid control circuit to injection water in process gas flow, controls the dry moisture of stem by a small margin.
When SDT stem drying tower does not adopt this device to control, after stopping feeds intake, the temperature of temperature sensor 8 measuring point can reach 200 degree within 2 minutes, the temperature of temperature sensor 8 measuring point is suppressed generally by Non-follow control air stove, but operation dependence experience, the words SDT stem drying tower of operational error is easily on fire, adopt this device, during according to normal production, the temperature of temperature sensor 8 measuring point is at about 145 degree, arranging T is 160 degree, and the temperature of temperature sensor 8 measuring point can be controlled below 170 degree by injection water management loop.
Adopting this device, when SDT drying tower does not have charging, the water of certain flow is sprayed in injection water management loop in process gas flow, to suppress the temperature of temperature sensor 8 measuring point in setting value near or below. Eliminate this equipment under original pattern, during without material, enter SDT at stem and steeply rise the hidden danger of the dust that even ignites to gas field temperature on the path of the entrance of technique blower fan. This apparatus structure is simple, controls simplicity, is a kind of control device effectively preventing SDT stem drying tower on fire.
Claims (5)
1. a SDT stem drying tower return air temperature controls device, including blower fan (7), feeder (11), cyclone dust extractor (10), moisture discharge device (6), drying tower (5), pressure transducer (12), oxygen content sensor (9), process gas flow temperature sensor (18), burner (4) and control system, it is characterized in that: Material Sensor (1) is installed on the feeding process path of SDT drying tower, process gas flow pipeline is provided with injection water management loop, inlet location at described blower fan (7) is provided with temperature sensor (8), described Material Sensor (1), injection water management loop and temperature sensor (8) communicate to connect with described control system, the desired temperature T of described temperature sensor (8) measuring point is set in described control system, this measuring point temperature 10-20 degree when desired temperature T is higher than normal productive process.
2. SDT stem drying tower return air temperature according to claim 1 controls device, it is characterized in that: described injection water management loop includes regulating valve (16), effusion meter (15), air relief valve (14), atomizing medium (13) and dual-medium nozzle (17), and described adjustment valve (16) and effusion meter (15) all access described control system.
3. SDT stem drying tower return air temperature according to claim 2 controls device, it is characterized in that: after the installation site of described dual-medium nozzle (17) is air stove, before charging aperture and on the process gas flow pipeline of close charging aperture.
4. the SDT stem drying tower return air temperature according to Claims 2 or 3 controls device, it is characterized in that: described effusion meter (15) is mass flowmenter or electromagnetic flowmeter.
5. SDT stem drying tower return air temperature according to claim 1 and 2 controls device, it is characterized in that: described Material Sensor (1) is diffuse-reflectance formula photoswitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521087317.XU CN205284969U (en) | 2015-12-24 | 2015-12-24 | SDT stalk silk drying tower air return temperature controlling means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521087317.XU CN205284969U (en) | 2015-12-24 | 2015-12-24 | SDT stalk silk drying tower air return temperature controlling means |
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| Publication Number | Publication Date |
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| CN205284969U true CN205284969U (en) | 2016-06-08 |
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| CN201521087317.XU Active CN205284969U (en) | 2015-12-24 | 2015-12-24 | SDT stalk silk drying tower air return temperature controlling means |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106072743A (en) * | 2016-06-17 | 2016-11-09 | 河南中烟工业有限责任公司 | A kind of stem method of quality control being dried based on stem and system |
| CN109275936A (en) * | 2017-07-21 | 2019-01-29 | 红塔烟草(集团)有限责任公司 | Stablize the control device and method of cut-tobacco drier hot wind relative humidity |
-
2015
- 2015-12-24 CN CN201521087317.XU patent/CN205284969U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106072743A (en) * | 2016-06-17 | 2016-11-09 | 河南中烟工业有限责任公司 | A kind of stem method of quality control being dried based on stem and system |
| CN106072743B (en) * | 2016-06-17 | 2018-05-25 | 河南中烟工业有限责任公司 | A kind of stem method of quality control and system based on stem drying |
| CN109275936A (en) * | 2017-07-21 | 2019-01-29 | 红塔烟草(集团)有限责任公司 | Stablize the control device and method of cut-tobacco drier hot wind relative humidity |
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