CN110722870A

CN110722870A - Drying circulation device, composite machine and drying method

Info

Publication number: CN110722870A
Application number: CN201911110771.5A
Authority: CN
Inventors: 严翔; 简甦; 李步清
Original assignee: Verboca Energy-Saving Technologies Co Ltd
Current assignee: Verboca Energy-Saving Technologies Co Ltd
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-01-24

Abstract

The invention discloses a drying circulating device, a compound machine and a drying method, relates to the technical field of drying equipment and aims to solve the technical problems of reduction in drying rate and resource waste caused by the fact that drying gas cannot be recycled in the prior art to a certain extent. The drying cycle device includes: the system comprises a first drying unit, a second drying unit, a main air supply unit, a gas collecting pipe and a main air exhaust unit; the main air supply unit is communicated with the air inlet end of the second drying unit and is used for conveying air into the second drying unit; the air exhaust end of the second drying unit is communicated with the main air exhaust unit through a gas collecting pipe; the air inlet end and the air exhaust end of the first drying unit and the air inlet end of the second drying unit are communicated with the gas collecting pipe.

Description

Drying circulation device, composite machine and drying method

Technical Field

The invention relates to the technical field of drying equipment, in particular to a drying circulating device, a compound machine and a drying method.

Background

The compounding of the compounding machine is to adhere two or more layers of materials to each other with an adhesive. In the process, hot air is usually adopted to heat the composite material, so that the adhesive is evaporated and dried, and meanwhile, the solvent in the adhesive is taken away to volatilize. The same solvent volatilization amount, the smaller the total exhaust air volume, the smaller the operation energy consumption and the lower the rear-end treatment cost.

However, most of the drying processes in the prior art are that the air intake and the air exhaust are basically consistent, and the drying gas cannot circulate in the drying device, so that the heat is discharged under the condition of not being reasonably utilized, and the great waste of resources is caused.

Therefore, it is desirable to provide a drying cycle device to solve the problems of the prior art to some extent.

Disclosure of Invention

The invention provides a drying circulating device, a compound machine and a drying method, which aim to solve the technical problems of reduction of drying rate and resource waste caused by incapability of recycling of drying gas in a drying device in the prior art to a certain extent.

The present invention provides a drying cycle apparatus, including: the system comprises a first drying unit, a second drying unit, a main air supply unit, a gas collecting pipe and a main air exhaust unit; the main air supply unit is communicated with an air inlet end of the second drying unit and is used for conveying air into the second drying unit; the air exhaust end of the second drying unit is communicated with the main air exhaust unit through the air collecting pipe; the air inlet end and the air exhaust end of the first drying unit and the air inlet end of the second drying unit are communicated with the gas collecting pipe.

The total air supply unit comprises a total air supply pipe, a total air supply machine and a total heater, wherein the total air supply machine and the total heater are sequentially arranged on the total air supply pipe along the air inlet direction.

Specifically, total exhaust unit includes total exhaust pipe and total exhaust fan, the collecting main with total exhaust pipe switches on mutually, total exhaust fan sets up on the total exhaust pipe for exhaust.

Further, the first drying unit comprises a first air supply pipe, a first air blower, a first exhaust pipe and a first exhaust fan; the first blower is arranged on the first air supply pipe, and an air outlet of the first air supply pipe is a first air supply outlet; the first exhaust fan is arranged on the first exhaust pipe, and an air inlet of the first exhaust pipe is a first exhaust port; the first air supply pipe is communicated with the gas collecting pipe, and the first exhaust pipe is communicated with the first air supply pipe through the gas collecting pipe.

Further, the second drying unit comprises a second air supply pipe, a second air blower, a second exhaust pipe and a second exhaust fan; the second blower is arranged on the second air supply pipe, and an air outlet of the second air supply pipe is a second air supply outlet; the second exhaust fan is arranged on the second exhaust pipe, and the air inlet of the second exhaust pipe is a second air outlet; the main air supply pipe is communicated with the second air supply pipe, and the second exhaust pipe is communicated with the second air supply pipe through the gas collecting pipe.

Furthermore, a first heater is arranged on the first air supply pipe, and the first heater is positioned between the first air feeder and the first air supply outlet and is used for heating the air in the first air supply pipe; and a second heater is arranged on the second air supply pipe, is positioned between the second air feeder and the second air supply outlet and is used for heating the air in the second air supply pipe.

Furthermore, the air supply pipe and/or the exhaust pipe of the first drying unit and the second drying unit are/is provided with a first regulating valve, and the first regulating valve is used for controlling the gas flow in the corresponding pipeline; the main air supply pipe is provided with a second regulating valve, the main exhaust pipe is provided with a concentration sensor, and the concentration sensor is used for monitoring the concentration information of the gas exhausted from the main exhaust pipe; the concentration sensor is electrically connected with the second regulating valve and used for regulating the opening degree of the second regulating valve according to the gas concentration information in the main exhaust pipe.

The drying circulating device provided by the invention further comprises a third drying unit; the third drying unit comprises a third air supply pipe, a third air feeder, a third heater, a third regulating valve and a third exhaust pipe, wherein an air outlet of the third air supply pipe is a third air supply outlet, and an air inlet of the third exhaust pipe is a third exhaust outlet; the third blower and the third heater are sequentially arranged on the third air supply pipe; the third regulating valve is arranged on the third exhaust pipe; and the third exhaust pipe is communicated with the third air supply pipe, so that air can circulate in the third drying unit.

Compared with the prior art, the drying circulation device has the following advantages:

according to the drying circulating device, the introduced drying gas can circulate in the first drying unit and the second drying unit, so that the utilization rate of heat is effectively improved, and materials are dried to the greatest extent.

In addition, the invention also provides a compound machine which comprises the drying circulating device and a plurality of drying ovens; the multiple drying ovens are sequentially arranged along the feeding direction, a feeding hole and a discharging hole are respectively formed in two sides of each drying oven, and the discharging holes among the multiple drying ovens are communicated with the feeding hole; the gas in the drying circulating device circularly flows among the drying ovens; the material to be dried can move along the direction from the feeding hole to the discharging hole and sequentially passes through the drying oven for drying treatment; the plurality of ovens comprises a first oven, a second oven, and a plurality of third ovens; the first drying oven and the first drying unit are arranged correspondingly, and the first air supply outlet and the first exhaust outlet are positioned in the first drying oven; the second drying oven and the second drying unit are arranged correspondingly, and the second air supply outlet and the second air exhaust outlet are positioned in the second drying oven; the plurality of third drying ovens and the plurality of third drying units are arranged in a one-to-one correspondence mode, and the third air supply openings and the corresponding third air exhaust openings are located in the third drying ovens.

In addition, the invention also provides a drying method, which comprises the following steps: s1, preheating the gas by a main blower through a main heater, then feeding the gas into a main air supply pipe, reheating the gas by a second blower and a second heater, and then feeding the gas into a second oven through a second air supply outlet; the dried gas enters the gas collecting pipe through the second exhaust fan through the second exhaust outlet, part of the gas entering the gas collecting pipe enters the second oven again under the action of the second blower, and part of the gas enters the first oven through the first heater under the action of the first blower; s2, the dried gas enters the gas collecting pipe through the first exhaust port by the first exhaust fan, part of the gas entering the gas collecting pipe enters the second oven, part of the gas enters the first oven again, and part of the gas is exhausted through the main exhaust pipe under the action of the first blower, the second blower and the main exhaust fan; s3, enabling the materials to enter from a feeding hole of the first oven and move towards a feeding hole of the second oven, and drying most of the materials in the process; s4, enabling the drying gas in the third drying ovens to self-circulate in the third drying units, enabling the materials dried by the first drying ovens and the second drying ovens to move from the feed inlets of the third drying ovens to the discharge outlets, enabling the negative pressure in the first drying units and the second drying units to suck part of the gas in the third drying units into the first drying ovens and the second drying ovens, and discharging the gas along the main exhaust pipe to finish drying the materials.

Compared with the prior art, the compound machine and the drying method have the same advantages by arranging the drying circulating device, and are not repeated herein.

In summary, the drying cycle apparatus provided by the embodiment of the present invention mainly has the advantages that the heating gas can be recycled in the drying unit, and the energy utilization rate is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of an overall structure of a drying cycle apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first drying unit and a second drying unit in a drying cycle apparatus according to an embodiment of the present invention;

fig. 3 is a schematic flow chart of a drying method according to an embodiment of the present invention.

In the figure: 1-a main blast pipe; 101-total blower; 102-total heater; 2-a gas collecting pipe; 3-a main exhaust duct; 301-general exhaust fan; 4-a first blast pipe; 401-a first blower; 402-a first heater; 403-a first air supply outlet; 5-a first exhaust duct; 501-a first exhaust fan; 502-first exhaust port; 6-a second air supply pipe; 601-a second blower; 602-a second heater; 603-a second air supply outlet; 7-a second exhaust duct; 701-a second exhaust fan; 702-a second air outlet; 8-a first regulating valve; 9-a second regulating valve; 10-a concentration sensor; 11-a third blast pipe; 1101-a third blower; 1102-a third heater; 1103-third supply-air outlet; 12-a third exhaust duct; 1201-third air outlet; 1202-third regulating valve; 13-automatic regulating valve; 14-a temperature sensor; 15-a pressure sensor; 16-a compound machine; 1601-a first oven; 1602-a second oven; 1603-third oven;

s-material advancing direction.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more of the items.

For ease of description, spatial relationship terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms also are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.

Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shape that occur during manufacturing.

The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

Fig. 1 is a schematic overall structure diagram of a hot air drying circulation device according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a first drying unit and a second drying unit in a hot air drying circulation device according to an embodiment of the present invention.

As shown in fig. 1 and fig. 2, the hot air drying circulation device according to the present invention includes: the system comprises a first drying unit, a second drying unit, a main air supply unit, a gas collecting pipe 2 and a main air exhaust unit; the main air supply unit is communicated with the air inlet end of the second drying unit and is used for conveying air into the second drying unit; the main exhaust unit is communicated with the gas collecting pipe 2 and used for exhausting gas; the air inlet end and the air outlet end of the first drying unit and the air inlet end of the second drying unit are communicated with the gas collecting pipe 2.

The air sent by the main air supply unit enters the second drying unit from the air inlet end of the second drying unit for drying and is discharged into the gas collecting pipe 2 from the air exhaust end. And part of the gas entering the gas collecting pipe 2 circulates again to enter the second drying unit, and part of the gas enters the first drying unit from the air inlet end of the first drying unit for drying and is discharged into the gas collecting pipe 2 from the air exhaust end of the first drying unit. And part of the gas entering the gas collecting pipe 2 is circulated again to enter the first drying unit, and part of the gas is exhausted from the main exhaust pipe 3.

When the concentration sensor 10 detects that the concentration of the gas exhausted from the main exhaust duct 3 is low, the main air supply unit is controlled to reduce the amount of the gas to be fed, so that the amounts of the circulating gas in the first drying unit and the second drying unit can be increased, and the amount of the gas to be fed is reduced, so that the pressure sensor 15 detects the pressure change, and the exhaust amount of the main exhaust fan 301 is controlled to be reduced to maintain the pressure unchanged, thereby improving the concentration of the exhausted gas.

When the concentration sensor 10 detects that the concentration of the gas exhausted from the main exhaust duct 3 is higher, the main air supply unit is controlled to increase the amount of the gas to be fed, so that the amount of the circulating gas in the first drying unit and the second drying unit can be reduced, and the amount of the gas to be fed is increased, so that the pressure sensor 15 detects the pressure change, and the exhaust amount of the main exhaust fan 301 is controlled to increase to maintain the pressure, so that the concentration of the exhausted gas can be reduced.

In addition, the circulation of the gas also absorbs part of the gas in the oven. Therefore, negative pressure can be generated in the oven, and the problem that drying gas in the oven diffuses outdoors to cause pollution can be avoided to a certain extent.

In the drying cycle apparatus of the present invention, the air blowing amounts of the first blower 401 and the second blower 601 are the same and smaller than the air blowing amounts of the first exhaust blower 501 and the second exhaust blower 701. Therefore, part of the gas in the gas collecting pipe can be circulated into the first drying unit, and part of the gas flows into the second drying unit. Since the discharge air volume of the first exhaust fan 501 is larger than the supply air volume of the first blower 401, the discharge air volume of the second exhaust fan 701 is larger than the supply air volume of the second blower 601. Therefore, negative pressure can be generated in the first drying unit and the second drying unit, so that air in the compound machine can be absorbed and enters the circulating pipeline, and dry waste air is guaranteed to be discharged from the main exhaust unit all the time.

According to the law of dalton evaporation: w ═ C (E-E)/P.

Wherein W is the liquid level evaporation rate; (E-E) is the saturation difference of air, wherein E is the saturated vapor pressure at the liquid surface temperature, and E is the actual vapor pressure of air above the liquid surface; p is air pressure; c is a proportionality coefficient related to wind speed, and a specific numerical value needs to be determined through experiments, namely a series of evaporation rates are determined at different wind speeds, and then the C value is determined by a statistical method at different wind speeds. The concentration of solvent in the oven cannot exceed 25% LEL due to safety requirements, taking the example of ethyl acetate, values of E and E at various temperatures.

When the drying temperature is 60 ℃ and the concentration is 0, W1 ═ C (55834-0)/P ═ 55837 ═ C/P is known;

when the drying temperature is 60 ℃ and the concentration is 25% LEL, W2 ═ C (55834-547)/P ═ 55287 ═ C/P is known;

when the drying temperature is 65 ℃ and the concentration is 25% LEL, W3 ═ C (66969-;

from (W2-W1)/W1 being 0.98%, the change in concentration had a very slight effect on the evaporation rate;

from (W3-W2)/W2 being 20%, it is known that the change in temperature has a significant effect on the evaporation rate.

The wind speed is in direct proportion to the wind quantity, and according to the formula, the wind quantity is also in direct proportion to the evaporation rate. Therefore, to control the drying rate, the drying temperature and air volume of each oven should be precisely controlled, and the temperature and air volume are not changed with the concentration change.

From the above analysis, it is found that when the gas is circulated and dried in the drying unit, the drying rate is not significantly affected even if the concentration of the circulated gas is gradually increased. Therefore, the air inlet end of the main air supply unit is communicated with the air inlet end of the second drying unit, air enters the second drying unit through the main air supply unit, and enters the air collecting pipe 2 from the air exhaust end of the second drying unit after being dried in the second drying unit. Because the air inlet end of the second drying unit and the air inlet end of the first drying unit are communicated with the air collecting pipe 2, one part of air circulates in the second drying unit, the other part of air enters the first drying unit for drying, the air dried in the first drying unit enters the air collecting pipe 2 from the air exhaust end of the first drying unit, one part of air is exhausted through the main air exhaust unit, and the other part of air enters the first drying unit again for circulating drying.

When the concentration of the discharged gas is about to reach a preset value, the main air inlet unit is controlled to increase the air inlet amount, so that the concentration of the gas in the circulating pipeline is reduced. When the gas concentration is low, the total air inlet unit is controlled to reduce the air inlet amount, so that the gas concentration in the circulating pipeline is improved.

Because the air intake and the air discharge in the first drying unit and the second drying unit are not changed, the air discharge of the total air discharge unit can be always ensured to be minimum under different solvent volatilization volumes, thereby reducing the cost of waste gas treatment.

As shown in fig. 1 and fig. 2, the main air supply unit includes a main air supply pipe 1, a main air supply machine 101 and a main heater 102, and the main air supply machine 101 and the main heater 102 are sequentially arranged on the main air supply pipe 1 along an air inlet direction for conveying heated air; the main exhaust unit comprises a main exhaust pipe 3 and a main exhaust fan 301, the gas collecting pipe 2 is communicated with the main exhaust pipe 3, and the gas collecting pipe 2 is respectively communicated with the first drying unit and the second drying unit; the main exhaust fan 301 is provided on the main exhaust duct 3 for exhausting gas.

The outside air enters the main air supply pipe 1 under the action of the main air supply blower 101, and is preheated by the main heater 102 to form preheated air, and the preheated air enters the first drying unit and the second drying unit to be dried, because the first drying unit and the second drying unit are communicated through the air collecting pipe 2, and the total air exhaust amount is less than the total amount of the circulating air in the drying circulating device. Therefore, most of drying gas can dry materials in the first drying unit and the internal circulation of the second drying unit, and then the utilization rate of the drying gas can be greatly improved, so that the energy loss is reduced.

Specifically, as shown in fig. 1 in conjunction with fig. 2, the air intake end of the first drying unit includes a first air supply pipe 4 and a first blower 401, and the air exhaust end of the first drying unit includes a first air exhaust pipe 5 and a first air exhaust fan 501; the first blower 401 is arranged on the first air supply pipe 4, and the first exhaust fan 501 is arranged on the first exhaust pipe 5; the first air supply pipe 4 and the first exhaust pipe 5 are communicated with the gas collecting pipe 2, so that gas can circulate in the first drying unit and the second drying unit; the air supply end of the first air supply pipe 4 forms a first air supply opening 403 for supplying air in the first air supply pipe 4, and the air inlet end of the first exhaust pipe 5 forms a first exhaust opening 502 for absorbing air into the first exhaust pipe 5, so that air can circulate in the first drying unit.

A part of the air dried by the second drying unit enters the second exhaust pipe 7 through the second exhaust port 702 under the influence of the second exhaust fan 701, and the first air supply pipe 4 is communicated with the gas collecting pipe 2 because the second exhaust pipe 7 is communicated with the second air supply pipe 6 through the gas collecting pipe 2. Therefore, the second air supply pipe 6, the second exhaust pipe 7 and the first air supply pipe 4 can be communicated through the gas collecting pipe 2.

Therefore, a part of the dry air introduced into the second exhaust duct 7 is recirculated into the second oven 1602 by the influence of the second blower 601, and a part of the dry air is introduced into the first air supply duct 4 by the influence of the first blower 401, heated by the first heater 402, and introduced into the first oven 1601 through the first air supply opening 403 to perform a drying operation.

The dried gas enters the first exhaust duct 5 from the first exhaust port 502 under the influence of the first exhaust fan 501. Because the first exhaust duct 5 is communicated with the gas collecting duct 2, the second air supply duct 6, the second exhaust duct 7, the first air supply duct 4 and the first exhaust duct 5 are communicated with each other. Therefore, a part of the gas entering the first exhaust duct 5 is influenced by the first blower 401 to circulate again into the first oven 1601, a part of the gas is influenced by the second blower 601 to circulate into the second oven 1602, and a part of the gas is influenced by the main exhaust duct 301 to be exhausted through the main exhaust duct 3.

Thus, the circulation of the gas within the first drying unit and the second drying unit and between the first drying unit and the second drying unit is performed by the self-circulation of the gas. The drying effect is guaranteed, meanwhile, the drying gas can be utilized to the maximum degree, and the energy consumption of heating the drying gas through the heater is reduced.

It should be noted that, in the drying cycle apparatus provided by the present invention, the output air volumes of the first blower 401, the first exhaust blower 501, the second blower 601, and the second exhaust blower 701 are fixed values, so that the stability of the air circulation in the whole pipeline can be ensured, the negative pressure in the first drying unit and the second drying unit can be ensured to be stable, and the drying rate can be ensured.

Specifically, as shown in fig. 1 and fig. 2, the air inlet end of the second drying unit includes a second air supply pipe 6 and a second blower 601, and the air outlet end of the second drying unit includes a second air exhaust pipe 7 and a second air exhaust fan 701; the second blower 601 is arranged on the second air supply pipe 6, and the second exhaust fan 701 is arranged on the second exhaust pipe 7; the main air supply pipe 1 is communicated with the second air supply pipe 6, the second exhaust pipe 7 is communicated with the second air supply pipe 6 through the gas collecting pipe 2, the air supply end of the second air supply pipe 6 forms a second air supply opening 603 used for supplying air in the second air supply pipe 6, and the air inlet end of the second exhaust pipe 7 forms a second air exhaust opening 702 used for absorbing air into the second exhaust pipe 7 so that the air can circulate in the second drying unit.

When the drying operation is performed, the external air enters the main air supply pipe 1 under the action of the main air supply blower 101, and is preheated by the main heater 102 to form preheated air, because the main air supply pipe 1 is communicated with the second air supply pipe 6, and the second air supply pipe 6 is provided with the second air supply blower 601 and the second heater 602. Therefore, the preheated gas enters the second air supply duct 6 under the influence of the second air blower 601, is reheated by the second heater 602, and then enters the second oven 1602 through the second air supply opening 603, thereby performing the drying operation of the material.

The dried air enters the second exhaust pipe 7 through the second exhaust port 702 under the influence of the second exhaust fan 701, because the second exhaust pipe 7 is communicated with the second air supply pipe 6 through the gas collecting pipe 2, and the first drying unit is communicated with the gas collecting pipe 2. Therefore, a part of the drying air entering the second exhaust duct 7 is influenced by the second blower 601 to circulate into the second oven 1602 again, and a part of the drying air enters the first drying unit to perform the drying operation.

The drying gas can be utilized to the maximum extent by the self-circulation of the first drying means and the circulation with the second drying means.

Further, as shown in fig. 1 and fig. 2, a first heater 402 is disposed on the first air supply pipe 4, and the first heater 402 is located between the first blower 401 and the first air supply outlet 403, and is used for heating the air in the first air supply pipe 4; the second air supply pipe 6 is provided with a second heater 602, and the second heater 602 is located between the second blower 601 and the second air supply outlet 603, and is used for heating the gas in the second air supply pipe 6.

The temperature of the gas entering the first oven 1601 and the second oven 1602 can be ensured by providing the first heater 402 and the second heater 602. In addition, since the gas can be recycled in the pipeline, the first heater 402 and the second heater 602 only need to output small power to ensure the temperature of the drying gas, thereby reducing the energy loss.

It should be noted that, since the gas in the pipeline is heated many times during the continuous circulation process, the gas is always circulated from the first drying unit to the second drying unit. Therefore, in the drying cycle apparatus according to the present invention, the temperature sensor 14 is additionally provided in the first air supply pipe 4 between the first heater 402 and the first air supply port 403, the automatic regulating valve 13 is additionally provided in the first air supply pipe 4 between the first air supply unit 401 and the gas collecting pipe 2, and the temperature sensor 14 is electrically connected to the automatic regulating valve 13.

When the gas heated by the first heater 402 exceeds the preset temperature range, the temperature sensor 14 can control the automatic regulating valve 13 to open, so that the external air enters the first air supply pipe 4, and the temperature of the gas in the first air supply pipe 4 is further reduced. The gas temperature in the whole pipeline is ensured, and the use safety is improved.

Furthermore, as shown in fig. 1 and fig. 2, a plurality of first adjusting valves 8 are further disposed on the air supply pipes and/or the air exhaust pipes of the first drying unit and the second drying unit, and the first adjusting valves 8 are used for controlling the air flow in the first drying unit and the second drying unit.

The first regulating valve 8 is arranged on a pipeline between the gas collecting pipe 2 and each fan. Because the temperature, humidity and atmospheric pressure of installation place's environment difference such as, consequently, need set for the output amount of wind of each fan in first drying unit and the second drying unit according to external environment. Through a plurality of first governing valves 8 that set up in first drying unit and second drying unit, can convenient and fast adjust the output amount of wind to optimum condition according to the environment.

It should be noted that, in the drying cycle apparatus provided in the present application, after the air volume is adjusted to the optimum air volume by the first adjusting valve 8, the output air volume of each fan in the first drying unit and the second drying unit does not need to be adjusted again in the subsequent operation process.

Furthermore, as shown in fig. 1 and fig. 2, the main air supply pipe 1 is provided with a second regulating valve 9, the main exhaust pipe 3 is provided with a concentration sensor 10, and the concentration sensor 10 is used for monitoring the gas concentration information in the main exhaust pipe 3; the concentration sensor 10 is electrically connected with the second regulating valve 9 and is used for adjusting the opening degree of the second regulating valve 9 according to the gas concentration information in the main exhaust duct 3.

Through the monitoring to the concentration of the gaseous stoving of total exhaust pipe 3 exhaust, and then control the intake of total forced draught blower, can change the intake according to the stoving state of difference constantly, on the one hand, it is faster to total forced draught blower 101's control response, and on the other hand has reduced the error of manual adjustment, makes stoving control more accurate.

It should be added that a pressure sensor 15 is disposed on the main exhaust duct 3 between the main exhaust fan 301 and the gas collecting duct 2, and the pressure sensor 15 is electrically connected to the main exhaust fan 301 and is used for changing the exhaust volume of the main exhaust fan 301 according to the change of different pressures.

When the volatilization amount of the solvent in the material is reduced and the concentration sensor 10 detects that the concentration is low, the total blower 101 is controlled to reduce the total air supply amount, and the air amount of other blowers is unchanged. At this time, the self-circulation air volume in the first drying unit increases, the self-circulation air volume in the second drying unit increases, the pressure sensor 15 in front of the main exhaust fan 301 detects a pressure change, and the main exhaust fan 301 is controlled to reduce the exhaust air volume so as to increase the exhaust concentration in order to maintain the pressure unchanged.

When the solvent volatilization amount in the material is increased and the concentration sensor 10 detects that the concentration is higher, the total blower 101 is controlled to increase the total air supply amount, and the air amount of other blowers is unchanged. At this time, the self-circulation air volume in the first drying unit is reduced, the self-circulation air volume in the second drying unit is reduced, the pressure sensor 15 in front of the main exhaust fan 301 detects the pressure change, and the main exhaust fan 301 is controlled to increase the exhaust air volume so as to reduce the exhaust concentration in order to maintain the pressure unchanged.

As shown in fig. 1, the drying cycle apparatus provided by the present invention further includes a plurality of third drying units; the plurality of third drying units include a third blowing duct 11, a third blower 1101, a third heater 1102, a third regulating valve 1202, and a third exhaust duct 12; the third blower 1101 and the third heater 1102 are sequentially arranged on the third blast pipe 11, the air supply end of the third blast pipe 11 forms a third air supply outlet 1103, and the third heater 1102 is positioned between the third blower 1101 and the third air supply outlet 1103; the third adjusting valve 1202 is disposed on the third exhaust duct 12, an air inlet end of the third exhaust duct 12 forms a third exhaust outlet 1201, and the third exhaust duct 12 is communicated with the third air supply duct 11, so that air can circulate inside the third drying unit.

In order to ensure the drying effect, the drying cycle device provided by the present application is provided with a plurality of third drying units, the gas in the third drying units enters the third oven 1603 through the third blowers 1101 to the third heater 1102 and the third blowing port 1103, the gas for drying materials in the oven enters the third exhaust duct 12 through the third exhaust port 1201 and circulates into the third oven 1603 again under the action of the third blowers 1101, so that the gas can self-circulate in the third drying units.

Because negative pressure is generated when the gas in the first drying unit and the second drying unit circulates, the volatile solvent remained in the third drying unit is sucked into the first drying unit or the second drying unit by the negative pressure and is circularly discharged.

It should be added here that, as shown in fig. 1, the number of the third drying units in the present application is two, and the two third drying units have the same structure. But not limited to, two, the number of the third drying units of the self-circulation is set according to the drying environment and the requirement.

The output air quantity of the fan is adjusted through the adjusting valve arranged in the application, and the function of adjusting the output air quantity of each fan through the frequency converter can be controlled.

In addition, as shown in fig. 1, the present invention further provides a compound machine 16, which comprises the above-mentioned drying cycle device and a plurality of ovens; the multiple drying ovens are sequentially arranged along the feeding direction, the two sides of each drying oven are provided with a feeding hole and a discharging hole, and the discharging holes among the multiple drying ovens are communicated with the feeding holes; the material to be dried can advance along the direction from the feeding hole to the discharging hole and sequentially passes through the drying oven to be dried.

During the drying operation, the material to be dried moves along the material advancing direction S, enters from the feeding port of the first oven 1601, moves to the feeding port of the second oven 1602 through the discharging port of the first oven 1601, and moves to the feeding port of the third oven 1603 through the discharging port of the second oven 1602 until moving out of the compound machine 16. In the process, the materials are dried by the second drying unit, then dried by the first drying unit, and finally dried by the third drying units.

Since the ovens in the composite machine 16 are provided with the inlet and the outlet, the negative pressure in the first drying unit and the second drying unit can cause the gas in the third drying units and the third ovens 1603 to be sucked into the first drying unit and the second drying unit and further to be discharged out of the overall circulation pipeline.

Wherein the plurality of ovens comprises a first oven 1601, a second oven 1602 and a plurality of third ovens 1603 as shown in fig. 1; the first oven 1601 is arranged corresponding to the first drying unit, and the first air supply opening 403 and the first air exhaust opening 502 are located in the first oven 1601; the second oven 1602 and the second drying unit are arranged correspondingly, and the second air supply outlet 603 and the second air exhaust outlet 702 are located in the second oven 1602; the plurality of third ovens 1603 and the plurality of third drying units are arranged in one-to-one correspondence, and the third supply air outlet 1103 and the corresponding third exhaust outlet 1201 are located in the third ovens 1603.

The drying oven and the drying units can ensure that the drying process is stably and continuously carried out relatively, and the drying ovens and the drying units cannot be influenced mutually, so that the drying effect is ensured.

As shown in fig. 3, the present invention also provides a drying method based on the above-mentioned drying cycle apparatus and the complex machine 16, the method comprising: s1, the air is preheated by the main blower 101 through the main heater 102, enters the main blower pipe 1, is reheated by the second blower 601 and the second heater 602, and enters the second oven 1602 through the second blower port 603; the dried gas enters the gas collecting pipe 2 through the second exhaust fan 701 via the second exhaust port 702, part of the gas entering the gas collecting pipe 2 enters the second oven 1602 again under the action of the second blower 601, and part of the gas enters the first oven 1601 by being heated by the first heater 402 under the action of the first blower 401; s2, the drying gas enters the gas collecting pipe 2 through the first exhaust fan 501 and the first exhaust port 502, under the action of the first blower 401, the second blower 601 and the main exhaust fan 301, part of the gas entering the gas collecting pipe 2 enters the second oven 1602, part of the gas enters the first oven 1601 again, and part of the gas is exhausted through the main exhaust pipe 3; s3, enabling the materials to enter from a feeding hole of the first oven 1601 and move towards a feeding hole of the second oven 1602, and drying most of the materials in the process; s4, the drying gas in the third ovens 1603 self-circulates in the third drying unit, the materials dried by the first ovens 1601 and the second ovens 1602 move from the feeding ports to the discharging ports of the third ovens 1603, the negative pressure in the first drying unit and the second drying unit sucks part of the gas in the third drying unit into the first ovens 1601 and the second ovens 1602, and the part of the gas is discharged along the main exhaust duct 3, thereby completing the drying of the materials.

During drying operation, firstly, heating the gas to a set temperature, circulating the gas in the whole pipeline to enable the inside of each drying oven to reach a drying environment, then sending the materials into the first drying oven 1601, and drying the materials through the drying gas in the second drying unit;

the material is then conveyed from the first oven 1601 into the second oven 1602, and dried by the drying gas in the second drying unit. The materials are dried in the first drying oven and the second drying oven, and most of the solvent in the materials can be discharged;

finally, the material is conveyed from the second oven 1602 to the third oven 1603, the residual solvent in the material is dried by the self-circulation of the third drying unit, and the gas generated after the material in the third oven 1603 is dried is sucked by the negative pressure in the first drying unit and the second drying unit and is exhausted by the main exhaust pipe 3.

It should be noted that the number of the third drying units can be set according to the solvent content in the specific material and the external environment, so as to ensure that the material can reach the required drying degree.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, changes, etc. within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A drying cycle apparatus, comprising: the system comprises a first drying unit, a second drying unit, a main air supply unit, a gas collecting pipe and a main air exhaust unit;

the main air supply unit is communicated with an air inlet end of the second drying unit and is used for conveying air into the second drying unit; the air exhaust end of the second drying unit is communicated with the main air exhaust unit through the air collecting pipe;

the air inlet end and the air exhaust end of the first drying unit and the air inlet end of the second drying unit are communicated with the gas collecting pipe.

2. The drying cycle apparatus as claimed in claim 1, wherein the main blower unit includes a main blower pipe, a main blower and a main heater, and the main blower and the main heater are sequentially disposed on the main blower pipe along an air intake direction.

3. The drying cycle apparatus according to claim 2, wherein the main exhaust unit includes a main exhaust duct and a main exhaust fan, the main exhaust duct is in communication with the main exhaust duct, and the main exhaust fan is disposed on the main exhaust duct for exhausting the gas.

4. The drying cycle apparatus according to claim 3, wherein the first drying unit includes a first blast duct, a first blower, and a first exhaust duct and a first exhaust fan;

the first blower is arranged on the first air supply pipe, and an air outlet of the first air supply pipe is a first air supply outlet; the first exhaust fan is arranged on the first exhaust pipe, and an air inlet of the first exhaust pipe is a first exhaust port;

the first air supply pipe is communicated with the gas collecting pipe, and the first exhaust pipe is communicated with the first air supply pipe through the gas collecting pipe.

5. The drying cycle apparatus according to claim 4, wherein the second drying unit includes a second blast pipe, a second blower, and a second exhaust duct and a second exhaust fan;

the second blower is arranged on the second air supply pipe, and an air outlet of the second air supply pipe is a second air supply outlet; the second exhaust fan is arranged on the second exhaust pipe, and the air inlet of the second exhaust pipe is a second air outlet;

the main air supply pipe is communicated with the second air supply pipe, and the second exhaust pipe is communicated with the second air supply pipe through the gas collecting pipe.

6. The drying cycle apparatus as claimed in claim 5, wherein a first heater is provided on the first air supply pipe, and the first heater is located between the first blower and the first air supply outlet, and is configured to heat the air in the first air supply pipe;

and a second heater is arranged on the second air supply pipe, is positioned between the second air feeder and the second air supply outlet and is used for heating the air in the second air supply pipe.

7. The drying cycle apparatus of claim 6, wherein the supply pipe and/or the exhaust pipe of the first drying unit and the second drying unit are provided with first adjusting valves, and the first adjusting valves are used for controlling the gas flow in the corresponding pipelines;

the main air supply pipe is provided with a second regulating valve, the main exhaust pipe is provided with a concentration sensor, and the concentration sensor is used for monitoring the concentration information of the gas exhausted from the main exhaust pipe;

the concentration sensor is electrically connected with the second regulating valve and used for regulating the opening degree of the second regulating valve according to the gas concentration information in the main exhaust pipe.

8. The drying cycle apparatus of claim 7, further comprising a third drying unit;

the third drying unit comprises a third air supply pipe, a third air feeder, a third heater, a third regulating valve and a third exhaust pipe, wherein an air outlet of the third air supply pipe is a third air supply outlet, and an air inlet of the third exhaust pipe is a third exhaust outlet;

the third blower and the third heater are sequentially arranged on the third air supply pipe;

the third regulating valve is arranged on the third exhaust pipe; and the third exhaust pipe is communicated with the third air supply pipe, so that air can circulate in the third drying unit.

9. A compound machine comprising the drying cycle apparatus as set forth in claim 8 and a plurality of ovens;

the multiple drying ovens are sequentially arranged along the feeding direction, a feeding hole and a discharging hole are respectively formed in two sides of each drying oven, and the discharging holes among the multiple drying ovens are communicated with the feeding hole; the gas in the drying circulating device circularly flows among the drying ovens;

the material to be dried can move along the direction from the feeding hole to the discharging hole and sequentially passes through the drying oven for drying treatment;

the plurality of ovens comprises a first oven, a second oven, and a plurality of third ovens;

the first drying oven and the first drying unit are arranged correspondingly, and the first air supply outlet and the first exhaust outlet are positioned in the first drying oven;

the second drying oven and the second drying unit are arranged correspondingly, and the second air supply outlet and the second air exhaust outlet are positioned in the second drying oven;

the plurality of third drying ovens and the plurality of third drying units are arranged in a one-to-one correspondence mode, and the third air supply openings and the corresponding third air exhaust openings are located in the third drying ovens.

10. A method of drying, comprising the steps of:

s1, preheating the gas by a main blower through a main heater, then feeding the gas into a main air supply pipe, reheating the gas by a second blower and a second heater, and then feeding the gas into a second oven through a second air supply outlet; the dried gas enters the gas collecting pipe through the second exhaust fan through the second exhaust outlet, part of the gas entering the gas collecting pipe enters the second oven again under the action of the second blower, and part of the gas enters the first oven through the first heater under the action of the first blower;

s2, the dried gas enters the gas collecting pipe through the first exhaust port by the first exhaust fan, part of the gas entering the gas collecting pipe enters the second oven, part of the gas enters the first oven again, and part of the gas is exhausted through the main exhaust pipe under the action of the first blower, the second blower and the main exhaust fan;

s3, enabling the materials to enter from a feeding hole of the first oven and move towards a feeding hole of the second oven, and drying most of the materials in the process;

s4, enabling the drying gas in the third drying ovens to self-circulate in the third drying units, enabling the materials dried by the first drying ovens and the second drying ovens to move from the feed inlets of the third drying ovens to the discharge outlets, enabling the negative pressure in the first drying units and the second drying units to suck part of the gas in the third drying units into the first drying ovens and the second drying ovens, and discharging the gas along the main exhaust pipe to finish drying the materials.