JP2013178024A - Drying furnace apparatus - Google Patents

Abstract

An object of the present invention is to improve the efficiency of drying processing of a processed product in a drying furnace and to keep the dry quality of the processed product high and stable.
High-temperature and high-humidity air RA discharged from a drying furnace 1 and passed through a regeneration zone 12 of a rotor type dehumidifier 10 is mixed with the introduced outside air OA in a state in which the mixing ratio can be adjusted, and humidified and preheated. The mixed outside air OA ′ is generated, and this mixed outside air OA ′ is passed through the treatment area 11 of the rotor type dehumidifier 10 to be supplied to the drying furnace 1 as the outside air for in-furnace ventilation in a dehumidified and additionally preheated state. .
[Selection] Figure 1

Description

The present invention relates to a drying furnace facility used for, for example, a drying treatment of an electrode sheet in an electrode manufacturing process of a lithium ion battery,
Specifically, a heating means for heating the inside of the drying furnace, an air supply means for furnace ventilation for supplying outside air for ventilation in the furnace to the drying furnace in parallel with heating in the furnace by the heating means, and this supply The present invention relates to a drying furnace facility including an exhaust means for ventilating the inside of the furnace that discharges high-temperature and high-humidity air in the furnace of the drying furnace to the outside in parallel with the supply of outside air by the air means.

  FIG. 4 shows an example of a conventional drying furnace facility. Reference numeral 1 denotes a drying furnace for drying a processed product W such as an electrode sheet. The drying furnace 1 circulates a plurality of or single circulators for circulating the furnace air RA. A circulation path 3 is provided, and a circulation fan 3 and a heater 4 are interposed in the circulation path 2. The heater 4 constitutes a heating means for heating the inside of the furnace.

  An air supply path 5 is connected to the circulation path 2, and the outside air OA introduced from outside is supplied to the drying furnace 1 by an air supply fan 7 through the air supply path 5 and a filter 6 interposed therebetween. To supply. Further, an exhaust passage 8 is connected to the drying furnace 1, and high-temperature and high-humidity air RA in the furnace (that is, high temperature in the furnace containing evaporated water from the processed material W) is exhausted by the exhaust fan 9 through the exhaust passage 8. Air) is discharged to the outside.

  That is, the air supply path 5 and the air supply fan 7 constitute an air supply means for ventilating the furnace, and the exhaust path 8 and the exhaust fan 9 constitute an exhaust means for ventilating the furnace, and these air supply means and By the ventilation in the furnace by the exhaust means, the water evaporated from the processed product W under the heating in the furnace by the heater 4 is discharged outside the furnace, and the atmosphere in the furnace is kept in a state suitable for drying the processed product W.

  (No suitable patent document is found)

  (No suitable non-patent literature is found)

  However, in the above-described conventional equipment (see FIG. 4), since the outside air OA introduced from the outside is supplied as it is to the drying furnace 1 as the outside air for furnace ventilation without being adjusted, the outside air OA due to seasonal changes, weather changes, etc. As the state changes, the in-furnace state (especially absolute humidity) of the drying furnace 1 changes, which causes a problem that the dry quality of the processed product becomes unstable.

  In addition, the air supply / exhaust volume for furnace ventilation and the amount of heating in the furnace required to keep the inside of the furnace in a state suitable for drying of the processed matter regardless of the change in the state of the outside air OA are large. There was also a problem that the operating cost of the system increased.

  In view of this situation, the main problem of the present invention is to effectively solve the above problem by rationally adjusting the outside air supplied to the drying furnace.

The first characteristic configuration of the present invention relates to a drying furnace facility,
Heating means for heating the inside of the drying furnace;
In-furnace ventilation air supply means for supplying outside air for furnace ventilation to the drying furnace in parallel with heating in the furnace by the heating means,
A drying furnace facility comprising exhaust means for ventilating the inside of the furnace for discharging high-temperature and high-humidity air in the furnace of the drying furnace in parallel with external air supply by the air supply means,
A rotor-type dehumidifier that rotates a breathable dehumidifying rotor holding a moisture absorbent in a state of straddling the treatment area and the regeneration area, and alternately and repeatedly positions each part of the rotor in the treatment area and the regeneration area. Provided,
The exhaust means is configured to pass the high-temperature and high-humidity air in the furnace of the drying furnace to the outside as the regeneration air and exhaust it to the outside.
A mixing means is provided that mixes a part or all of the high-temperature and high-humidity air that has passed through the regeneration zone with outside air introduced from the outside by the air supply means to generate humidified and preheated mixed outside air,
A mixing ratio adjusting means for adjusting the mixing ratio of the introduced outside air mixed with the mixing means and the high temperature and high humidity air is provided,
The air supply means is configured to supply the mixed outside air generated by the mixing means to the drying furnace in a dehumidified state by passing it through the treatment area as outside air for furnace ventilation.

  According to this configuration, part or all of the high-temperature and high-humidity air that has passed through the regeneration area of the rotor-type dehumidifier is mixed with the outside air introduced from the outside, so that the mixed outside air in a humidified and preheated state (in short, In this mixing, the mixing ratio of the outside air introduced from outside and the high temperature high humidity air is adjusted by the mixing ratio adjusting means. In addition, the humidification and preheating degree of the mixed outside air in the humidification and preheating by the mixing can be adjusted.

  Then, following this mixing, the humidified and preheated mixed outside air is passed through the treatment area of the rotor type dehumidifier, and is passed through the dehumidification rotor portion located in the treatment area. While the mixed outside air is additionally preheated to some extent by the heat exchange function, the mixed outside air can be dehumidified to reduce the humidity of the mixed outside air, and finally the drying oven uses the above mixing as the outside air for furnace ventilation. It is possible to supply the mixed outside air that has been humidified and preheated and subsequently dehumidified and additionally preheated by passing through the treatment zone.

  In parallel with this, the high-temperature and high-humidity air discharged from the drying furnace by the exhaust means is passed through the regeneration area of the rotor-type dehumidifier, and is passed through the dehumidification rotor portion located in the regeneration area. The portion of the dehumidification rotor that has moved to the regeneration zone due to dehumidification of the mixed outside air in the zone can be regenerated with high-temperature and high-humidity air. Can be continuously dehumidified.

  Therefore, when the outside air is at low temperature and low humidity, such as in winter, the processing ratio is adjusted by adjusting the mixing ratio to the side that reduces the amount of outside air in the mixing (in other words, the side that increases the amount of high-temperature, high-humidity air). Increase the humidity of the mixed outside air in the humidification by the above mixing relative to the amount of dehumidification from the mixed outside air in the oven, and increase the humidity (especially absolute humidity) of the mixed outside air supplied to the drying furnace compared to the introduced outside air Can do.

  On the other hand, when the outside air is hot and humid in summer or the like, the processing ratio can be adjusted by adjusting the mixing ratio to the side that increases the amount of outside air in the above mixing (in other words, the side that reduces the amount of mixed air of high temperature and high humidity air). The humidity of the mixed outside air in the humidification by the above mixing is lowered relative to the dehumidification amount from the mixed outside air in the oven, and the humidity (especially absolute humidity) of the mixed outside air supplied to the drying furnace is made lower than that of the introduced outside air. be able to.

  That is, by adjusting the mixing ratio according to the humidity change of the outside air by the mixing ratio adjusting means, the low humidity mixed outside air whose humidity is preferentially stabilized or stabilized regardless of the humidity change of the outside air is used for ventilation in the furnace. As a result, it can be supplied to the drying furnace as outside air, which makes it possible to more efficiently treat the processed material in the drying furnace as compared with the above-mentioned conventional equipment in which the outside air introduced from the outside is supplied as it is to the drying furnace as outside air for ventilation in the furnace. Drying treatment can be performed, and the dry quality of the treated product can be kept high and stable regardless of changes in the state of the outside air.

  In addition, since the processed material can be efficiently dried in this way, the supply / exhaust air volume for ventilation in the furnace can also be effectively reduced, preheated by the above mixing, and further with the passage through the processing zone. The additional preheated mixed outside air is supplied to the drying furnace by the additional heat exchange function of the dehumidifying rotor, so that the amount of heating required for the heating means for heating the inside of the furnace can be effectively reduced, and also drying is performed. Combined with the regeneration of the dehumidification rotor using high-temperature and high-humidity air discharged from the furnace, the energy consumption of the entire equipment can be effectively reduced, and the operating cost of the equipment can be reduced. it can.

  According to the above configuration, the mixing ratio is adjusted by the mixing ratio adjusting unit according to the temperature change of the outside air, and the preheating degree of the mixing outside air in the preheating by the mixing is adjusted, regardless of the temperature change of the outside air. A low-humidity mixed outside air whose temperature is preferentially stabilized or constant can be supplied to the drying furnace.

  That is, an operation for supplying low-humidity mixed outside air whose humidity is preferentially stabilized or stabilized as described above to the drying furnace, and an operation for supplying low-humidity mixed outside air whose temperature is preferentially stabilized or stabilized to the drying furnace, Can be selectively carried out as necessary, and in this respect as well, it is possible to provide a drying furnace facility that is further superior in terms of function.

The second feature configuration of the present invention specifies an embodiment suitable for the implementation of the first feature configuration.
Provided with a control means for operating the mixing ratio adjusting means, and provided with a humidity sensor for detecting the humidity of the mixed outside air passed through the treatment area and dehumidified,
As the supply air humidity control, the control means sets the humidity of the mixed outside air that has been dehumidified by passing through the treatment area by adjusting the mixing ratio by the mixing ratio adjusting means based on the humidity detected by the humidity sensor. It is in the point of having the structure adjusted to humidity.

  According to this configuration, as described above, the operation of supplying the low-humidity mixed outside air having a constant humidity to the drying furnace regardless of the humidity change of the outside air is automatically performed by executing the supply air humidity control by the control means. Can do.

The third feature configuration of the present invention specifies an embodiment suitable for the implementation of the second feature configuration.
A temperature sensor for detecting the temperature of the mixed outside air that has been passed through the treatment area and dehumidified is provided,
The control means is configured to selectively execute the supply air humidity control and the supply air temperature control according to a switching command,
In this supply air temperature control, the temperature of the mixed outside air that has been dehumidified by passing through the processing zone is adjusted to the set supply air temperature by adjusting the mixing ratio by the mixing ratio adjusting means based on the temperature detected by the temperature sensor. It is in the point which is made into a structure.

  According to this configuration, as described above, the operation of supplying the low-humidity mixed outside air having a constant temperature irrespective of the temperature change of the outside air to the drying furnace is performed by applying the switching command to the control means and the supply air temperature control by the control means. This can be done automatically by execution.

The fourth feature configuration of the present invention specifies an embodiment suitable for the implementation of the third feature configuration.
While providing a bypass path for bypassing part or all of the high-temperature high-humidity air discharged from the drying furnace by the exhaust means to the regeneration area,
A diversion ratio adjusting means is provided for adjusting a diversion ratio between the high-temperature and high-humidity air that passes through the bypass passage and the high-temperature and high-humidity air that passes through the regeneration zone.
The control means passes through the processing area by adjusting the mixing ratio and the diversion ratio by the mixing ratio adjusting means and the diversion ratio adjusting means based on the temperature detected by the temperature sensor during the supply air temperature control. The temperature of the mixed outside air that has been dehumidified is adjusted to the set supply air temperature.

  According to this configuration, in addition to adjusting the preheating degree of the mixed outside air in the preheating by the mixing by adjusting the mixing ratio by the mixing ratio adjusting means, the diversion ratio is adjusted by the diversion ratio adjusting means, so that the processing area It is also possible to adjust the preheating amount of the additional preheating of the mixed outside air by the incidental heat exchange function by the rotation of the dehumidifying rotor accompanying the passage.

  Therefore, in the operation of supplying the low-humidity mixed outside air with a constant temperature to the drying furnace regardless of the temperature change of the outside air, it is possible to increase the temperature fluctuation range of the outside air that can be dealt with.

Configuration diagram of drying furnace equipment showing an embodiment Graph explaining supply air humidity control Graph explaining supply air temperature control Configuration diagram of conventional drying furnace equipment

  FIG. 1 shows a drying furnace facility. Reference numeral 1 denotes a drying furnace used for electrode sheet drying processing in an electrode manufacturing process of a lithium ion battery. In this drying furnace 1, a plurality of circulation paths 2 for circulating the furnace air RA are provided. These circulation paths 2 are respectively provided with a circulation fan 3 and a heater 4 as furnace heating means.

  That is, the furnace air RA is circulated in the circulation path 2 by the circulation fan 3 and the circulation air RA is heated by the heater 4 to keep the inside of the drying furnace 1 in a uniform state at a predetermined high temperature. Thus, moisture is evaporated from the processed product W in the furnace to dry the processed product W.

  An air supply path 5 is connected to each circulation path 2 via a branch air supply path 5 a, and outside air OA ′ for ventilation in the furnace is supplied by an air supply fan 7 through the branch air supply path 5 a and the air supply path 5. Supply to the drying furnace 1. Note that a filter 6 is interposed in the air supply path 5.

  Further, an exhaust passage 8 is connected to the drying furnace 1 via a branch exhaust passage 8a, and high-temperature and high-humidity air RA (that is, processed material) in the furnace is exhausted by the exhaust fan 9 through the branch exhaust passage 8a and the exhaust passage 8. High temperature air containing evaporated water from W) is discharged to the outside.

  That is, the branch air supply path 5a, the air supply path 5, and the air supply fan 7 constitute an air supply means for ventilation in the furnace, and the branch exhaust path 8a, the exhaust path 8 and the exhaust fan 9 are used for ventilation in the furnace. The exhaust means is configured, and the atmosphere in the furnace is maintained in a state suitable for drying the processed product W against moisture evaporation from the processed product W by the ventilation in the furnace by the air supply unit and the exhaust unit.

  The air supply path 5 is an air path through which the outside air OA ′ for ventilation inside the furnace supplied to the drying furnace 1 passes through the treatment area 11 of the rotor type dehumidifier 10 as dehumidification target air, while the exhaust path 8 A high-temperature and high-humidity air RA discharged from the drying furnace 1 is used as a regenerative air to pass through the regeneration area 12 of the rotor type dehumidifier 10.

  The rotor type dehumidifying device 10 rotates a breathable dehumidifying rotor 13 holding a hygroscopic agent in a state of straddling the processing area 11 and the regeneration area 12, and each part of the rotor is changed to the processing area 11 and the regeneration area 12. It is of a device configuration that is alternately and repeatedly positioned.

  That is, in the treatment area 11, the outside air OA ′ for ventilation in the furnace is passed as dehumidification target air to the dehumidification rotor portion located in the treatment area 11, so that the outside air OA ′ for ventilation in the furnace is retained by the moisture absorbent retained in the rotor portion. Dehumidify.

  On the other hand, in the regeneration zone 12, the high-temperature and high-humidity air RA discharged from the drying furnace 1 is passed through the regeneration zone 12 as regeneration air, so that moisture is removed by dehumidification of the outside air OA ′ for in-furnace ventilation in the previous treatment zone 11. The dehumidified rotor portion that has moved to the regeneration zone 12 in the collected state is regenerated with high-temperature and high-humidity air RA in preparation for dehumidification in the next treatment zone 11, thereby drying in the treatment zone 11 as the dehumidification rotor 13 rotates. The outside air OA ′ for ventilation inside the furnace supplied to the furnace 1 is continuously dehumidified.

  The exhaust path 8 is provided with an exhaust-side bypass path 14 that bypasses the high-temperature and high-humidity air RA discharged from the drying furnace 1 with respect to the regeneration area 12, and on the other hand, in the vicinity of the exit of the regeneration area 12 in the exhaust path 8. In the location and the exhaust-side bypass path 14, the split flow ratio between the high-temperature and high-humidity air RA that passes through the regeneration area 12 as regeneration air and the high-temperature and high-humidity air RA that passes through the exhaust-side bypass path 14 and bypasses the regeneration area 12. The motor dampers V1 and V2 for adjusting the diversion ratio are provided as diversion ratio adjustment means for adjusting Ky.

  In this example, [diversion ratio Ky = air volume of high-temperature, high-humidity air RA that passes through the regeneration region 12 / air volume of high-temperature, high-humidity air RA that passes through the exhaust-side bypass passage 14].

  Similarly, the air supply path 5 is provided with an air supply side bypass path 15 for detouring the outside air OA from the processing area 11. In the air-side bypass 15, the outside air OA ′ for in-furnace ventilation that passes through the treatment area 11 as dehumidification target air, and the outside air OA ′ for in-furnace ventilation that passes through the supply-side bypass 15 and bypasses the treatment area 11. Motor dampers V3 and V4 for adjusting the current diversion ratio Kz.

  In this example, it is assumed that the motor dampers V3 and V4 on the air supply side are each set to a predetermined fixed opening (for example, V3: fully open, V4: fully closed).

  A portion of the air supply path 5 upstream of the processing area 11 and a portion of the exhaust path 8 downstream of the regeneration area 12 are connected by a mixing path 16, and the mixing path 16 is connected to the air supply fan 7 and Along with the exhaust fan 9, a part of or all of the high-temperature and high-humidity air RA that has passed through the regeneration zone 12 is mixed with the outside air OA introduced from the outside into the air supply path 5 to humidify and preheat the mixed outside air OA ′. Construct the mixing means to be generated.

  Further, a portion of the air supply passage 5 upstream of the connection location of the mixing passage 16, a portion of the exhaust passage 8 downstream of the connection location of the mixing passage 16, and the mixing passage 16 are provided in the air supply passage 5. Motor dampers Vs, Vr, and Vm for adjusting the mixing ratio are provided as mixing ratio adjusting means for adjusting the mixing ratio Kx of the introduced outside air OA and the high-temperature and high-humidity air RA to be mixed at the connection point of the mixing path 16.

  In this example, [mixing ratio Kx = air volume of high-temperature and high-humidity air RA mixed into the introduced outside air OA through the mixing path 16 / air volume of the introduced outside air OA].

  In the air supply path 5, a humidity sensor 17 for detecting the absolute humidity xs (dew point temperature in this example), temperature ts, and air volume qs of the mixed outside air OA ′ sent to the drying furnace 1 as outside air for furnace ventilation and an air supply qs. A side temperature sensor 18 and an air volume sensor 19 are provided.

  Further, the exhaust path 8 is equipped with an exhaust-side temperature sensor 20 and an air volume sensor 21 for detecting the temperature tr and the air volume qr of the high-temperature and high-humidity air RA sent from the drying furnace 1 to the regeneration area 12 as regeneration air. .

  This drying furnace equipment is equipped with an operation controller 22 as control means for operating the air supply fan 7, the exhaust fan 9 and each motor damper V based on the detection information of each sensor described above. Reference numeral 22 is configured to execute the following supply air volume control and exhaust air volume control as basic control.

(A) Supply air volume control By controlling the rotation speed of the supply fan 7 based on the detected air volume qs of the supply air volume sensor 19, the mixed outside air OA ′ supplied to the drying furnace 1 as the outside air for furnace ventilation That is, the air volume qs of the mixed air obtained by mixing the high-temperature and high-humidity air RA guided by the mixing path 16 with the introduced outside air OA is adjusted to the set supply air volume qss.

(B) Exhaust air volume control By controlling the rotational speed of the exhaust fan 9 based on the detected air volume qr of the exhaust air volume sensor 21, the air volume qr of the high-temperature and high-humidity air RA discharged from the drying furnace 1 through the exhaust passage 8 is set. The exhaust air volume is adjusted to qrr (≈qss).

  In addition, the operation controller 22 is configured to selectively execute the next supply air humidity control or supply air temperature control in accordance with the switching command given under the execution of the supply air flow control and the exhaust air flow control. It is.

(C) Supply air humidity control Under the operation of the rotor type dehumidifier 10, the opening of the mixing ratio adjusting motor dampers Vs, Vr, Vm based on the detected humidity xs of the humidity sensor 17 is set as shown in FIG. The mixing ratio Kx is adjusted by adjusting according to Lb, and the absolute humidity xs of the mixed outside air OA ′ supplied to the drying furnace 1 is adjusted to the set supply humidity xss (for example, xss = 12 g / kg).

  That is, the lower the detected humidity xs of the humidity sensor 17, the smaller the opening of the motor dampers Vs and Vr, and the opposite of this, the opening of the motor damper Vm is increased, thereby introducing the introduced outside air OA and the high-temperature and high-humidity air RA. The mixing ratio Kx in the mixing is increased, thereby adjusting the absolute humidity xs (dew point temperature td) of the mixed outside air OA ′ supplied to the drying furnace 1 as the outside air for in-furnace ventilation to the increasing side, and by the above mixing The temperature ts of the mixed outside air OA ′ supplied to the drying furnace 1 by increasing the preheating degree of the mixed outside air OA ′ during preheating is also adjusted to the rising side.

  Conversely, as the detected humidity xs of the humidity sensor 17 increases, the opening degree of the motor dampers Vs and Vr is increased, and the opening degree of the motor damper Vm is decreased against this, thereby introducing the outside air OA and the high temperature and high humidity. The mixing ratio Kx in the mixing with the air RA is reduced, thereby adjusting the absolute humidity xs of the mixed outside air OA ′ supplied to the drying furnace 1 as the outside air for furnace ventilation to the lower side, and the preheating by the above mixing The temperature ts of the mixed outside air OA ′ supplied to the drying furnace 1 by reducing the preheating degree of the mixed outside air OA ′ is also adjusted to the lower side.

  That is, when the introduced outside air OA is at low temperature and low humidity and the detected humidity xs of the humidity sensor 17 tends to decrease in winter or the like, the dehumidification amount in the processing area 11 is adjusted by adjusting the mixing ratio Kx to the increasing side. The humidification of the mixed outside air OA in humidification by the above mixing is relatively increased, and the absolute humidity xs (dew point temperature td) of the mixed outside air OA ′ supplied to the drying furnace 1 is made higher than that of the introduced outside air OA.

  On the other hand, when the introduced outside air OA is at high temperature and high humidity and the detected humidity xs of the humidity sensor 17 is increasing in summer, etc., the dehumidification amount in the processing area 11 is adjusted by adjusting the mixing ratio Kx to the decreasing side. On the other hand, the humidification of the mixed outside air OA ′ in the humidification by the above mixing is relatively lowered, and the absolute humidity xs (dew point temperature td) of the mixed outside air OA ′ supplied to the drying furnace 1 is made lower than that of the introduced outside air OA. .

  And by adjusting the mixing ratio Kx in this way, the low humidity mixed outside air OA ′ having the set supply humidity xss is stably supplied to the drying furnace 1 regardless of the absolute humidity change of the introduced outside air OA. In addition, the processing object W is efficiently dried in the drying furnace 1, and the drying quality of the processing object W is stably kept high regardless of the change in the absolute humidity of the introduced outside air OA.

  Further, throughout the year, the mixed outside air OA ′ preheated by the above mixing and further preheated by the additional heat exchange function of the dehumidifying rotor 13 as it passes through the processing zone 11 is supplied to the drying furnace 1 as the outside air for ventilation in the furnace. This effectively reduces the amount of heating required for the heater 4 as the furnace heating means.

(D) Supply air temperature control Under the operation of the rotor type dehumidifier 10, the opening of the mixing ratio adjusting motor dampers Vs, Vr, Vm and the shunt ratio adjusting damper V1, based on the detected temperature ts of the supply air temperature sensor 18 By adjusting the opening degree of V2 according to the set correlation lines Lc to Lf as shown in FIG. 3, the mixing ratio Kx and the diversion ratio Ky are adjusted, and the temperature ts of the mixed outside air OA ′ supplied to the drying furnace 1 is set. The supply air temperature is adjusted to tss (for example, tss = 40 ° C.).

  That is, when the detected temperature ts of the supply side temperature sensor 18 is lower than the predetermined threshold temperature tsm (ts ≦ tsm), the motor damper V1 is set to 100% opening (fully open) and the motor damper V2 is set to 0% opening (full opening). Close).

  In this state, the lower the detected temperature ts of the supply side temperature sensor 18, the smaller the opening of the motor dampers Vs and Vr, and the opposite of this is to increase the opening of the motor damper Vm. Kx is increased, thereby increasing the preheating degree of the mixed outside air OA ′ in the preheating by the mixing and adjusting the temperature ts of the mixed outside air OA ′ supplied to the drying furnace 1 to the rising side.

  Conversely, as the detected temperature ts of the supply side temperature sensor 18 increases, the opening degree of the motor dampers Vs and Vr is increased, and the opening degree of the motor damper Vm is decreased against the increase in the mixing ratio Kx. The temperature ts of the mixed outside air OA ′ supplied to the drying furnace 1 is adjusted to the lower side by decreasing the preheating degree of the mixed outside air OA ′ during the preheating by the mixing.

  On the other hand, when the detected temperature ts of the supply side temperature sensor 18 is higher than the predetermined threshold temperature tsm (ts> tsm), the motor dampers Vs and Vr are set to 100% opening (fully opened) and the motor damper Vm is opened 0%. Degree (fully closed).

  In this state, the lower the detected temperature ts of the supply side temperature sensor 18, the smaller the opening degree of the motor damper V 2, and against this, the opening degree of the motor damper V 1 is increased to increase the diversion ratio Ky. Accordingly, the mixed outside air OA supplied to the drying furnace 1 by increasing the preheating amount in the additional preheating of the mixed outside air OA ′ by the accompanying heat exchange function due to the rotation of the dehumidifying rotor 13 accompanying the passage of the processing area 11. The temperature ts of ′ is adjusted to the rising side.

  Conversely, as the detected temperature ts of the supply side temperature sensor 18 becomes higher, the opening degree of the motor damper V2 is increased, and the opening degree of the motor damper V1 is decreased against this to decrease the diversion ratio Ky. Thus, the temperature ts of the mixed outside air OA to be sent to the drying furnace 1 while reducing the amount of preheating in the additional preheating of the mixed outside air OA ′ by the incidental heat exchange function due to the rotation of the dehumidifying rotor 13 as it passes through the treatment area 11. Adjust to the lower side.

  That is, by adjusting the mixing ratio Kx and the diversion ratio Ky in this way, the low-humidity mixed outside air OA ′ at the set supply air temperature tss is stabilized in the drying furnace 1 as the outside air for furnace ventilation regardless of the temperature change of the introduced outside air OA. To supply.

[Another embodiment]
Next, other embodiments of the present invention will be listed.

  In the above-described embodiment, an example in which the high-temperature and high-humidity air RA that has passed through the regeneration region 12 of the rotor dehumidifier 10 is divided into two systems, one that is mixed with the introduced outside air OA and one that is discharged outside. However, instead of this, the high-temperature and high-humidity air RA that has passed through the regeneration zone 12 is mixed with the introduced outside air OA, the sensible heat exchange with the introduced outside air OA by the heat exchange means, and the one that is discharged to the outside. The air flow of the high temperature and high humidity air RA in each of the three systems may be adjusted by adjusting the opening of the damper.

  In the above-described embodiment, the example in which the rotational speed of the dehumidifying rotor 13 is fixed at a constant speed in the operation of the rotor type dehumidifying device 10 is shown, but instead of this, the mixing ratio Kx and the above-mentioned are changed according to the state change of the outside air OA. In addition to adjusting the diversion ratio Ky, the rotational speed of the dehumidifying rotor 13 may be adjusted in accordance with a change in the state of the outside air OA.

  In the above-described embodiment, the split flow ratio between the mixed outside air OA ′ that passes through the processing area 11 of the rotor type dehumidifier 10 and the mixed outside air OA ′ that passes through the supply side bypass air passage 15 and bypasses the processing area 11. Although an example in which Kz is fixed to a constant value has been shown, instead of adjusting the mixing ratio Kx and the diversion ratio Ky in accordance with a change in the state of the outside air OA, this diversion on the supply side The ratio Kz may also be adjusted according to the state change of the outside air OA.

  As supply air humidity control, by adjusting the mixing ratio Kx based on the detected humidity xs by the humidity sensor 17, the humidity xs of the mixed outside air OA ′ supplied to the drying furnace 1 is adjusted to the set supply air humidity xss. Various adjustment methods are adopted to adjust the mixing ratio Kx in the supply air humidity control, such as adjusting the mixing ratio Kx by general PID control according to the deviation between the humidity xs and the set supply air humidity xss. can do.

  Similarly, as the supply air temperature control, the temperature ts of the mixed outside air OA ′ supplied to the drying furnace 1 is adjusted by adjusting the mixing ratio Kx and the diversion ratio Ky based on the temperature ts detected by the supply-side temperature sensor 18. In order to adjust to the set supply air temperature tss, the mixing ratio Kx and the diversion ratio Ky are adjusted by general PID control according to the deviation between the detected temperature ts and the set supply air temperature tss. Various adjustment methods can be adopted for adjusting the mixing ratio Kx and the diversion ratio Ky in the air temperature control.

  The processed product W to be dried in the furnace of the drying furnace 1 is not limited to the electrode sheet, and any material can be used as long as it can be dried by increasing the temperature and decreasing the humidity in the furnace.

  The drying furnace equipment according to the present invention can be used for drying various articles and substances in various fields.

DESCRIPTION OF SYMBOLS 1 Drying furnace 4 Heating means 5, 5a, 7 Air supply means for furnace ventilation RA High-temperature, high-humidity air 8, 8a, 9 Exhaust means for furnace ventilation 13 Dehumidification rotor 11 Processing area 12 Regeneration area 10 Rotor type dehumidification Equipment OA Introduced outside air OA 'Mixed outside air 16, 7, 9 Mixing means Kx Mixing ratio Vs, Vr, Vm Mixing ratio adjusting means 22 Control means 17 Humidity sensor xs Detection humidity xss Set supply air humidity 18 Temperature sensor ts Detection temperature tss Set supply Air temperature 14 Bypass path Ky Split ratio V1, V2 Split ratio adjustment means

Claims (4)

Heating means for heating the inside of the drying furnace;
In-furnace ventilation air supply means for supplying outside air for furnace ventilation to the drying furnace in parallel with heating in the furnace by the heating means,
A drying furnace facility comprising exhaust means for ventilating the inside of the furnace for discharging high-temperature and high-humidity air in the furnace of the drying furnace in parallel with external air supply by the air supply means,
A rotor-type dehumidifier that rotates a breathable dehumidifying rotor holding a moisture absorbent in a state of straddling the treatment area and the regeneration area, and alternately and repeatedly positions each part of the rotor in the treatment area and the regeneration area. Provided,
The exhaust means is configured to pass the high-temperature and high-humidity air in the furnace of the drying furnace to the outside as the regeneration air and exhaust it to the outside.
A mixing means is provided that mixes a part or all of the high-temperature and high-humidity air that has passed through the regeneration zone with outside air introduced from the outside by the air supply means to generate humidified and preheated mixed outside air,
A mixing ratio adjusting means for adjusting the mixing ratio of the introduced outside air mixed with the mixing means and the high temperature and high humidity air is provided,
The drying furnace equipment, wherein the air supply means is configured to supply the outside air generated by the mixing means to the drying furnace in a dehumidified state by passing it through the treatment area as outside air for furnace ventilation. Provided with a control means for operating the mixing ratio adjusting means, and provided with a humidity sensor for detecting the humidity of the mixed outside air passed through the treatment area and dehumidified,
As the supply air humidity control, the control means sets the humidity of the mixed outside air that has been dehumidified by passing through the treatment area by adjusting the mixing ratio by the mixing ratio adjusting means based on the humidity detected by the humidity sensor. The drying furnace equipment according to claim 1, which is configured to be adjusted to humidity. A temperature sensor for detecting the temperature of the mixed outside air that has been passed through the treatment area and dehumidified is provided,
The control means is configured to selectively execute the supply air humidity control and the supply air temperature control according to a switching command,
In this supply air temperature control, the temperature of the mixed outside air that has been dehumidified by passing through the processing zone is adjusted to the set supply air temperature by adjusting the mixing ratio by the mixing ratio adjusting means based on the temperature detected by the temperature sensor. The drying furnace equipment according to claim 2, which is configured. While providing a bypass path for bypassing part or all of the high-temperature high-humidity air discharged from the drying furnace by the exhaust means to the regeneration area,
A diversion ratio adjusting means is provided for adjusting a diversion ratio between the high-temperature and high-humidity air that passes through the bypass passage and the high-temperature and high-humidity air that passes through the regeneration zone.
The control means passes through the processing area by adjusting the mixing ratio and the diversion ratio by the mixing ratio adjusting means and the diversion ratio adjusting means based on the temperature detected by the temperature sensor during the supply air temperature control. 4. The drying furnace equipment according to claim 3, wherein the temperature of the mixed outside air dehumidified is adjusted to the set supply air temperature.

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