Device and method for improving quality level of cut stem drying of fluidized bed
阅读说明:本技术 一种提高流化床烘梗丝质量水平的装置及方法 (Device and method for improving quality level of cut stem drying of fluidized bed ) 是由 胡素霞 万盛 周萍芳 叶明樵 刘兴乐 于 2019-11-13 设计创作,主要内容包括:本发明提供一种提高流化床烘梗丝质量水平的装置及方法,属于流化床烘梗丝技术领域。该提高流化床烘梗丝质量水平的装置及方法包括流化床槽体、进料端、出料端、第一干燥件和第二干燥件。本发明实现对经过一干燥室的物料进行干燥和对经过一干燥室的物料进行干燥,梗丝质量得到了进一步提升,保证了卷烟内在质量的一致性。(The invention provides a device and a method for improving quality level of fluidized bed cut stem drying, and belongs to the technical field of fluidized bed cut stem drying. The device and the method for improving the quality level of the cut stems baked by the fluidized bed comprise a fluidized bed groove body, a feeding end, a discharging end, a first drying piece and a second drying piece. The invention realizes the drying of the material passing through the drying chamber and the drying of the material passing through the drying chamber, further improves the quality of the cut stems, and ensures the consistency of the internal quality of the cigarettes.)
1. The utility model provides an improve fluidized bed and dry by fire device of stalk silk quality level which characterized in that: the drying device comprises a fluidized bed groove body (10), a feeding end (9) arranged at one end of the fluidized bed groove body (10), a discharging end (15) arranged at the other end of the fluidized bed groove body (10), a first drying piece used for drying materials passing through the first end to the second end of the fluidized bed groove body (10) and a second drying piece used for drying materials passing through the third end to the fourth end of the fluidized bed groove body (10), wherein the first drying piece comprises a zone drying chamber (16), a zone steam and dust extraction box (17) arranged at the top end of the zone drying chamber (16), a first air conveying pipe with one end connected to the zone steam and dust extraction box (17), a zone air inlet door (19) arranged at the first end of a first conveying pipe and used for guiding external air into the zone air inlet door when the first drying piece is opened, a zone air exhaust door (18) arranged at the second end of the first conveying pipe and used for exhausting gas flowing out of the zone steam and dust extraction box (17) when the first conveying pipe is, A first zone fan motor (20) arranged at the third end of the first conveying pipe and used for sucking the outside air, a third air conveying pipe with one end connected with the first zone fan motor (20) and used for receiving the outside air sucked from the first zone fan motor (20), a fourth air conveying pipe with one end connected with the second air conveying pipe and used for receiving the outside air of the second air conveying pipe, a first zone heat exchange linkage air door (21) arranged at one end of the second air conveying pipe, a first zone heat exchanger (22) arranged on the fourth air conveying pipe and used for heating the outside air into hot air, a fifth air conveying pipe with one end connected with the third air conveying pipe and the fourth air conveying pipe respectively and the other end connected with a zone drying chamber (16) and used for receiving the outside air and the hot air respectively to form mixed air and conveying the mixed air to the zone drying chamber (16), and a first zone mixed air door (23) arranged on the fifth air conveying pipe, the second drying part comprises a second area drying chamber (24), a second area steam-dust extraction box (25) arranged at the top end of the second area drying chamber (24), a sixth air conveying pipe with one end connected with the second area steam-dust extraction box (25), a second area air inlet air door (27) arranged at the first end of the first conveying pipe and used for introducing outside air when the first conveying pipe is opened, a second area air outlet air door (26) arranged at the second end of the first conveying pipe and used for discharging air flowing out of the second area steam-dust extraction box (25) when the first conveying pipe is opened, a second area fan motor (28) arranged at the third end of the first conveying pipe and used for sucking outside air, a seventh air conveying pipe with one end connected with the second area fan motor (28) and used for receiving outside air sucked from the second area fan motor (28), an eighth air conveying pipe with one end connected with the seventh air conveying pipe and one end connected with the seventh air conveying pipe, The device comprises a ninth air delivery pipe used for receiving external air of the seventh air delivery pipe, a two-zone heat exchange linkage air door (29) arranged at one end of the seventh air delivery pipe, a two-zone heat exchanger (30) arranged on the ninth air delivery pipe and used for heating the external air into hot air, a ten air delivery pipe with one end connected to the eighth air delivery pipe and the ninth air delivery pipe respectively, and the other end connected to a two-zone drying chamber (24), a tenth air delivery pipe used for receiving the external air and the hot air respectively to form mixed air and delivering the mixed air to the two-zone drying chamber (24), and a two-zone mixed air door (31) arranged on the tenth air delivery pipe.
2. The apparatus for improving the quality level of fluidized bed cut rolled stems according to claim 1, wherein: first district drying chamber (16) including set up in dry first district (12) of fluidized bed cell body (10) first end, set up in the first screen cloth shake the groove in dry first district (12) bottom and set up in first screen cloth shake the groove top, be used for preventing that the first screen cloth of material roll-off shakes a district stock guide (11) in groove, two district drying chamber (24) including set up in dry second district (13) of fluidized bed cell body (10) second end, set up in the second screen cloth shake the groove in dry second district (13) bottom and set up in second screen cloth shake the groove top, be used for preventing material roll-off second screen cloth shake two district stock guide (14) in groove.
3. The apparatus for improving the quality level of fluidized bed cut rolled stems according to claim 2, wherein: the first-zone material guide plates (11) are respectively arranged at two ends of the top of the first screen vibrating groove, and the second-zone material guide plates (14) are respectively arranged at two ends of the top of the second screen vibrating groove.
4. An apparatus for improving the quality level of fluidized bed cut rolled stems according to claim 2 or 3, wherein: the first-zone material guide plate (11) comprises a plurality of first connecting plates (111) which are hinged to each other, a first elastic plastic film (112) which is coated on the first connecting plates (111) and used for preventing materials from sliding out of the hinged positions of the first connecting plates (111), and a first fixing structure which is used for fixing the first connecting plates (111) on the first screen vibrating groove, and the second-zone material guide plate (14) comprises a plurality of second connecting plates (141) which are hinged to each other, a second elastic plastic film (142) which is coated on the second connecting plates (141) and used for preventing materials from sliding out of the hinged positions of the second connecting plates (141), and a second fixing structure which is used for fixing the second connecting plates (141) on the second screen vibrating groove.
5. The apparatus for improving the quality level of fluidized bed cut rolled stems according to claim 4, wherein: first fixed knot constructs including setting up in first ring (113) and one end of first connecting plate (111) bottom pass first screen cloth in proper order and shake first sieve mesh on the groove, first ring (113) and be connected in first iron wire (114) of the other end, second fixed knot constructs including setting up in second ring (143) and one end of second connecting plate (141) bottom pass second screen cloth in proper order and shake second sieve mesh on the groove, second ring (143) and be connected in second iron wire (144) of the other end.
6. The apparatus for improving the quality level of fluidized bed cut rolled stems according to claim 4, wherein: and a moisture discharging member for discharging condensed water generated when the outside air is heated to the hot wind by the one-zone heat exchanger (22) or the two-zone heat exchanger (30).
7. The apparatus for improving the quality level of fluidized bed cut rolled stems according to claim 6, wherein: the moisture removing piece comprises a manual ball valve (1), a flange (2) connected to one end of the manual ball valve (1), a water flow viewing mirror (3) connected to the other end of the flange (2), a drain valve (4) connected to the other end of the water flow viewing mirror (3), a filter (5) connected to the other end of the drain valve (4), a main drain pipe (7) connected to the other end of the filter (5), a bypass drain pipe (6) arranged at one end of the main drain pipe (7) and a heat exchanger connecting pipe (8) with one end connected to the main drain pipe (7) and the other end connected to the heat exchanger, a drain through hole (615) for draining water from the main drain pipe (7) is arranged at the joint of the bypass drain pipe (6) and the main drain pipe (7), and a sealing drain through hole (615) for sealing when the water pressure in the main drain pipe (7) is smaller than a preset pressure is arranged on the bypass drain pipe, And the sealing structure (6) is stressed to move in a direction away from the drainage through hole (615) when the water pressure in the main drainage pipe (7) is higher than the preset pressure.
8. The apparatus for improving the quality level of fluidized bed cut rolled stems according to claim 7, wherein: the area of the drain through hole (615) is smaller than the sectional area of the bypass drain pipe (6), the sealing structure (6) comprises a sealing plate (611) for sealing the drain through hole (615), a first spring (612) for pushing the sealing plate (611) to move towards the direction close to the drain through hole (615) so that the sealing plate (611) seals the drain through hole (615), and a first connecting rod (613) with one end connected to the inner side wall of the bypass drain pipe (6) and the other end connected to the first spring (612), and the area of the sealing plate (611) is smaller than the sectional area of the bypass drain pipe (6).
9. The apparatus for improving the quality level of fluidized bed cut rolled stems according to claim 8, wherein: bypass drain pipe (6) are the cylinder body, the junction of bypass drain pipe (6) and main drain pipe (7) is equipped with circular backstop board, drainage through hole (615) are for setting up on circular backstop board, semi-circular drainage through hole (615) that the radius is less than circular backstop board's radius, it is equipped with recess (614) that the area is greater than the area of drainage through hole (615) to lie in drainage through hole (615) periphery on the circular backstop board, closing plate (611) are the area that the area is less than recess (614), area is greater than sealing plate (611) of drainage through hole (615) area.
10. A method for improving the quality level of cut stems baked by a fluidized bed is characterized by comprising the following steps:
s1: calculating a theoretical air temperature through a mathematical model, adjusting a target air temperature according to the theoretical air temperature, and adjusting the opening of a target film valve according to the target air temperature so as to adjust the opening of an air door;
s2: detecting actual air volume through a flowmeter, and acquiring the actual opening degree of the membrane valve through a mathematical model according to the actual air volume;
s3: if the actual opening of the thin film valve is inconsistent with the target opening of the thin film valve, calculating the opening of the thin film valve through PID (proportion integration differentiation) to correct and adjust the opening of the target diaphragm valve, and if the actual opening of the thin film valve is consistent with the target opening of the thin film valve, judging whether the actual water content of the outlet is consistent with the set water content;
s4: and if the actual outlet water content is not consistent with the set water content, calculating the air temperature through PID, correcting and adjusting the target air temperature, and if the actual outlet water content is consistent with the set water content, ending the operation.
Technical Field
The invention belongs to the technical field of fluidized bed cut stem drying, and relates to a device and a method for improving quality level of fluidized bed cut stem drying.
Background
The cut stems are used as one of important blending material raw materials for reducing the tar and the harm of the cigarettes, the quality of the cut stems has more and more obvious influence on the quality stability of the cigarettes, the cut stem drying process plays an important role in ensuring the quality processing process of the cut stems, the current cut stem drying process has two modes of roller thin plate drying and tunnel type fluidized bed drying, because of different equipment structures, the water stability of the cut stems dried by the roller drying process mode is better, but the expansion effect of the cut stems is not good, the cut stems dried by the fluidized bed drying process have large sheet shape and good expansion effect, the cigarette tar and harm reduction effect is obvious, the current cut stem drying process mode used in the industry is also more, but the fluidized bed drying process has certain defects, the current fluidized bed drying equipment is divided into two areas for drying, a hot air system is adopted to dehydrate the cut stems in the cut stem drying process, the water index is not stable, the quality of finished product stem is affected, and the quality of cigarette products is affected when the finished product stem is blended in tobacco shreds.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a device and a method for improving the quality level of cut stem drying of a fluidized bed, and the technical problems to be solved by the invention are as follows: how to provide a device and a method for improving the quality level of the cut stems baked by a fluidized bed.
The purpose of the invention can be realized by the following technical scheme:
the device for improving the quality level of the cut stems baked by the fluidized bed comprises a fluidized bed groove body, a feeding end arranged at one end of the fluidized bed groove body, a discharging end arranged at the other end of the fluidized bed groove body, a first drying piece used for drying materials passing through the first end to the second end of the fluidized bed groove body and a second drying piece used for drying materials passing through the third end to the fourth end of the fluidized bed groove body, wherein the first drying piece comprises a zone drying chamber, a zone steam and dust extraction box arranged at the top end of the zone drying chamber, a first air conveying pipe with one end connected to the zone steam and dust extraction box, a zone air inlet door arranged at the first end of a first conveying pipe and used for guiding external air into the zone air inlet door when the first drying piece is opened, a zone air exhaust door arranged at the second end of the first conveying pipe and used for exhausting gas flowing out from the zone steam and dust extraction box when the first conveying pipe is opened, and a zone, A first area fan motor for sucking the outside air, a second air delivery pipe with one end connected to the first area fan motor for receiving the outside air sucked from the first area fan motor, a third air delivery pipe with one end connected to the second air delivery pipe for receiving the outside air of the second air delivery pipe, a fourth air delivery pipe with one end connected to the second air delivery pipe for receiving the outside air of the second air delivery pipe, a first area heat exchange linkage air door arranged at one end of the second air delivery pipe, a first area heat exchanger arranged on the fourth air delivery pipe for heating the outside air into hot air, a fifth air delivery pipe with one end connected to the third air delivery pipe and the fourth air delivery pipe respectively, a fifth air delivery pipe with the other end connected to a first area drying chamber for receiving the outside air and the hot air respectively to form mixed air and delivering the mixed air to the first area drying chamber, and a first area mixed air door arranged on the fifth air delivery pipe, wherein the second drying part comprises a second area drying chamber, a second area drying, A second-zone steam-dust extraction box arranged at the top end of the second-zone drying chamber, a sixth air delivery pipe with one end connected with the second-zone steam-dust extraction box, a second-zone air inlet door arranged at the first end of the first conveying pipe and used for introducing the outside air when the first conveying pipe is opened, a second-zone air exhaust door arranged at the second end of the first conveying pipe and used for exhausting the air exhausted from the second-zone steam-dust extraction box when the first conveying pipe is opened, a second-zone fan motor arranged at the third end of the first conveying pipe and used for sucking the outside air, a seventh air delivery pipe with one end connected with the second-zone fan motor and used for receiving the outside air sucked from the second-zone fan motor, an eighth air delivery pipe with one end connected with the seventh air delivery pipe, a ninth air delivery pipe with one end connected with the seventh air delivery pipe and used for receiving the outside air of the seventh air delivery pipe, and a second-zone linkage air door arranged at one end of the seventh, The second-zone heat exchanger is arranged on the ninth air delivery pipe and used for heating the outside air into hot air, one end of the second-zone heat exchanger is connected to the eighth air delivery pipe and the ninth air delivery pipe respectively, the other end of the second-zone heat exchanger is connected to the second-zone drying chamber, the tenth air delivery pipe is used for receiving the outside air and the hot air respectively to form mixed air and delivering the mixed air to the second-zone drying chamber, and the second-zone mixed air door is arranged on the tenth air delivery pipe.
Preferably, the drying chamber of first district is including setting up in the dry first district of the first end of fluidized bed cell body, setting up in the first screen cloth vibration groove of dry first district bottom and setting up in first screen cloth vibration groove top, be used for preventing that the first screen cloth of material roll-off shakes a district stock guide in groove, the drying chamber of two districts is including setting up in the dry second district of fluidized bed cell body second end, setting up in the second screen cloth vibration groove of dry second district bottom and setting up in second screen cloth vibration groove top, be used for preventing the two district stock guides in material roll-off second screen cloth vibration groove.
Preferably, the first-zone guide plates are respectively arranged at two ends of the top of the first screen vibrating trough, and the second-zone guide plates are respectively arranged at two ends of the top of the second screen vibrating trough.
Preferably, the first area material guide plate comprises a plurality of first connecting plates hinged to each other, a first elastic plastic film coated on the first connecting plates and used for preventing materials from sliding out of the hinged positions of the first connecting plates, and a first fixing structure used for fixing the first connecting plates on the first screen vibrating chute, and the second area material guide plate comprises a plurality of second connecting plates hinged to each other, a second elastic plastic film coated on the second connecting plates and used for preventing materials from sliding out of the hinged positions of the second connecting plates, and a second fixing structure used for fixing the second connecting plates on the second screen vibrating chute.
Preferably, first fixed knot constructs including setting up in the first ring and the one end of first connecting plate bottom pass first screen cloth in proper order and shake first sieve mesh, first ring on the groove and connect in the first iron wire of the other end, second fixed knot constructs including setting up in the second ring and the one end of second connecting plate bottom pass second screen cloth in proper order and shake second sieve mesh, second ring on the groove and connect in the second iron wire of the other end.
Preferably, the air conditioner further comprises a moisture discharging member for discharging condensed water generated when the external air is heated to the hot wind by the one-zone heat exchanger or the two-zone heat exchanger.
Preferably, arrange damp spare and include manual ball valve, connect in the flange of manual ball valve one end, connect in the rivers sight glass of the flange other end, connect in the trap of the rivers sight glass other end, connect in the filter of the trap other end, connect in the main drain pipe of the filter other end, set up in the bypass drain pipe and the one end of main drain pipe one end and connect in main drain pipe, the other end is connected in heat exchanger connecting pipe of heat exchanger, the junction of bypass drain pipe and main drain pipe is equipped with the water drainage through-hole that supplies to follow the water discharge in the main drain pipe, be equipped with on the bypass drain pipe and be used for sealing the water drainage through-hole when the water pressure in the main drain pipe is less than preset pressure, the seal structure of atress towards the direction motion of keeping away from the water drainage through.
Preferably, the area of the drain through hole is smaller than the sectional area of the bypass drain pipe, the sealing structure includes a sealing plate for sealing the drain through hole, a first spring for urging the sealing plate to move toward a direction close to the drain through hole so that the sealing plate seals the drain through hole, and a first link having one end connected to the inner side wall of the bypass drain pipe and the other end connected to the first spring, and the area of the sealing plate is smaller than the sectional area of the bypass drain pipe.
Preferably, the bypass drain pipe is a cylinder pipe, a circular stop plate is arranged at the joint of the bypass drain pipe and the main drain pipe, the drain hole is a semicircular drain hole which is arranged on the circular stop plate and has a radius smaller than that of the circular stop plate, a groove with an area larger than that of the drain hole is arranged on the periphery of the drain hole on the circular stop plate, and the sealing plate is a sealing plate with an area smaller than that of the groove and an area larger than that of the drain hole.
A method for improving the quality level of cut stems baked by a fluidized bed comprises the following steps:
s1: calculating a theoretical air temperature through a mathematical model, adjusting a target air temperature according to the theoretical air temperature, and adjusting the opening of a target film valve according to the target air temperature so as to adjust the opening of an air door;
s2: detecting actual air volume through a flowmeter, and acquiring the actual opening degree of the membrane valve through a mathematical model according to the actual air volume;
s3: if the actual opening of the thin film valve is inconsistent with the target opening of the thin film valve, calculating the opening of the thin film valve through PID (proportion integration differentiation) to correct and adjust the opening of the target diaphragm valve, and if the actual opening of the thin film valve is consistent with the target opening of the thin film valve, judging whether the actual water content of the outlet is consistent with the set water content;
s4: and if the actual outlet water content is not consistent with the set water content, calculating the air temperature through PID, correcting and adjusting the target air temperature, and if the actual outlet water content is consistent with the set water content, ending the operation.
The material is fed from the feeding end of the invention, a zone air inlet air door and a zone fan motor are opened to make the outside air enter a first air delivery pipe, a second air delivery pipe receives the outside air sucked from the zone fan motor, a zone heat exchange linkage air door is opened, a third air delivery pipe receives the outside air of the second air delivery pipe, a fourth air delivery pipe receives the outside air of the second air delivery pipe, a zone heat exchanger heats the outside air into hot air, a zone mixed air door is opened, the hot air and the outside air are mixed into mixed air, a fifth air delivery pipe delivers the mixed air to a zone drying chamber to dry the material passing through the drying chamber, the zone air outlet air door is opened after drying is finished to make the gas exhausted from the zone drying chamber be exhausted from the zone air outlet air door, the zone air inlet air door and the zone fan motor are opened to make the outside air enter a sixth air delivery pipe, the seventh air delivery pipe receives the air from the inhaled external air of second district fan motor, two district heat exchange linkage air doors open, the eighth air delivery pipe receives the air from the outside of second air delivery pipe, the ninth air delivery pipe receives the air from the outside of second air delivery pipe, two district heat exchangers heat the air from the outside to be hot-blast, two district air door of mixing opens, hot-blast and air from the outside mix is the air mixing, the tenth air delivery pipe carries the air mixing to two district drying chambers, realize carrying out the drying to the material through a drying chamber, open two district exhaust air doors after the drying finishes, make the gas that follows two district drying chambers exhaust air doors and discharge, the material after the drying is exported from the discharge end, improve the quality of stalk silk.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the first and second zone guides of the present invention disposed on the fluidized bed tank, respectively;
FIG. 3 is a schematic view of a first region of the material guide plate of the present invention fixed to the first vibrating screen trough by iron wires;
FIG. 4 is a schematic view of a first elastic plastic film wrapped around a first connecting plate according to the present invention;
FIG. 5 is a schematic view of the structure in which the two-zone guide plates are fixed to the second screen vibrating chute by iron wires according to the present invention;
FIG. 6 is a schematic view of a second elastic plastic film wrapped around a second web according to the present invention;
FIG. 7 is a schematic view of the moisture excluding member of the present invention;
FIG. 8 is a sectional view of a bypass drain pipe when the sealing structure of the present invention is provided in the drain through hole;
FIG. 9 is a first side view of the bypass drain of the present invention with the sealing plate abutting the groove;
FIG. 10 is a second side view of the bypass drain with the drain through hole of the present invention disposed in the bypass drain;
FIG. 11 is a schematic flow diagram of the present invention.
In the figure: 1-manual ball valve, 2-flange, 3-water flow sight glass, 4-drain valve, 5-filter, 6-bypass drain pipe, 61-sealing structure, 611-sealing plate, 612-first spring, 613-first connecting rod, 614-groove, 615-drain through hole, 7-main drain pipe, 8-heat exchanger connecting pipe, 9-feed end, 10-fluidized bed groove body, 11-first region guide plate, 111-first connecting plate, 112-first elastic plastic film, 113-first circular ring, 114-first iron wire, 12-first dry region, 13-second dry region, 14-second region guide plate, 141-second connecting plate, 142-second elastic plastic film, 143-second circular ring, 144-second iron wire, 15-discharge end, 16-first zone drying chamber, 17-first zone steam dust extraction box, 18-first zone exhaust air door, 19-first zone intake air door, 20-first zone fan motor, 21-first zone heat exchange linkage air door, 22-first zone heat exchanger, 23-first zone mixed air door, 24-second zone drying chamber, 25-second zone steam dust extraction box, 26-second zone exhaust air door, 27-second zone intake air door, 28-second zone fan motor, 29-second zone heat exchange linkage air door, 30-second zone heat exchanger and 31-second zone mixed air door.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Referring to fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, the apparatus for improving quality level of tobacco shreds baked by fluidized bed in the present embodiment includes a fluidized
Here, the material is supplied from the
In the first-
In the second-
The moisture exhaust air door is enlarged, the moisture exhaust capacity is increased, dust generated in a drying area and air with higher humidity are drawn away as much as possible through moisture exhaust, and the filter screen of the heat exchanger is prevented from being blocked. The return air door is reduced, the return air does not participate in circulation as much as possible, and the moisture brought by the return air is prevented from forming condensation at the heat exchanger. Then the fresh air is utilized to supplement air to meet the negative pressure balance of the hot air system and perform the heat exchange function. The dry air forms hot air and then enters the drying area, so that the dehydration capacity is improved.
The changes before and after adjustment are as follows:
before adjustment:
after the adjustment:
a
The first-zone
The
The two-region
The first-zone
The first fixing structure comprises a first
The bottom end of the
The bottom end of the second connecting
The device for improving the quality level of the fluidized bed cut rolled stems in the embodiment can also comprise a moisture discharging piece for discharging condensed water generated when the external air is heated to hot air by the first-
The moisture discharging piece comprises a
Set up
The
The area of the drain through
The
The first spring 612 may be a cylindrical coil spring, such that the first spring 612 is aligned when it is expanded and contracted, and it is prevented that the first spring 612 collides with an inner sidewall of the
The center line of the first spring 612 may coincide with the center line of the sealing
The other end of the first spring 612 may be welded to the sealing
The
The center of the drainage through
Referring to fig. 11, a method for improving the quality level of the fluidized bed cut rolled stems comprises the following steps:
s1: calculating a theoretical air temperature through a mathematical model, adjusting a target air temperature according to the theoretical air temperature, and adjusting the opening of a target film valve according to the target air temperature so as to adjust the opening of an air door;
s2: detecting actual air volume through a flowmeter, and acquiring the actual opening degree of the membrane valve through a mathematical model according to the actual air volume;
s3: if the actual opening of the thin film valve is inconsistent with the target opening of the thin film valve, calculating the opening of the thin film valve through PID (proportion integration differentiation) to correct and adjust the opening of the target diaphragm valve, and if the actual opening of the thin film valve is consistent with the target opening of the thin film valve, judging whether the actual water content of the outlet is consistent with the set water content;
s4: and if the actual outlet water content is not consistent with the set water content, calculating the air temperature through PID, correcting and adjusting the target air temperature, and if the actual outlet water content is consistent with the set water content, ending the operation.
The opening degree of an air door of the hot air radiator is fixed at 100%, and all fresh air and return air enter the radiator to exchange heat. Then, the steam pressure PID control tracking set temperature mode is used for replacing the original air door tracking set temperature control mode, and the CV air door output in the original one-zone and two-zone hot air temperature PID is changed into the output of a steam film method. According to the collected real-time data, the water content at the inlet of the fluidized bed is used as an independent variable, the actual air temperature is used as a dependent variable, and the deviation between the target air temperature and the actual air temperature is used for controlling the opening of the steam film valve of the radiator through PID calculation so that the actual air temperature reaches a target value.
And (3) counting standard deviation of the water content of the outlet of the transformed fluidized bed:
the hot air of the fluidized bed dries the stalk silk material layer from bottom to top. The cut stem drying equipment is provided with two hot air drying areas, and each drying area is provided with an independent hot air heating system. The hot air temperature of the drying area can be respectively set and can be automatically adjusted. The air speed of the hot air entering the drying area is adjusted through a hot air outlet pipeline adjusting valve. The hot air passes through a vertical regulating valve (below the entering fluidized bed, the cut stems are dried by the fluidized bed surface, most of the hot air is recycled by a heating system, and a small part of the hot air is discharged to the outside through a return air regulating valve and a moisture discharge pipe which are arranged in the middle of the top of the drying area.
The saturation in the steam pipeline of the fluidized bed hot air system is obviously improved by adjusting the remanufactured steam pipeline, the deviation of section moisture is reduced by 0.1 percent, and the phenomena of blockage and condensation of a filter screen of a heat exchanger are basically avoided. The temperature of hot air passing through the heat exchanger is uniform, the display value of the hot air temperature sensor is more real than before, the hot air entering the drying area is more balanced and the temperature is stable, and the dehydration capacity of the drying area is greatly improved by the modification of the first drying piece and the second drying piece. Now drying the
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
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