CN111692868B

CN111692868B - Gypsum board drying system and drying method

Info

Publication number: CN111692868B
Application number: CN202010374254.5A
Authority: CN
Inventors: 王兵; 杨正波; 张羽飞; 陈凌; 张军; 杨小东; 郝志超
Original assignee: Beijing New Building Material Group Co Ltd; China National Building Materials Innovation and Technology Research Institute Co Ltd
Current assignee: Beijing New Building Material Group Co Ltd; China National Building Materials Innovation and Technology Research Institute Co Ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2021-06-22
Anticipated expiration: 2040-05-06
Also published as: CN111692868A

Abstract

A gypsum board drying system and a method thereof, wherein the system comprises a board inlet area, a plurality of drying areas and a board outlet area which are arranged in sequence, and gypsum boards to be dried are conveyed from the board inlet area to a first drying area in the plurality of drying areas; sequentially drying the gypsum boards to be dried in the plurality of drying zones, and conveying the dried gypsum boards to a board discharging zone, wherein the gypsum boards are dried in a first drying zone of the plurality of drying zones by adopting transverse wind in a partitioning manner, and the gypsum boards are dried in other drying zones by adopting longitudinal wind; the dried gypsum board is transported through the outlet area to the location for the next process. This application can improve the production efficiency and the product quality of gypsum board.

Description

Gypsum board drying system and drying method

Technical Field

This application relates to but is not limited to gypsum board production and more particularly to a gypsum board drying system and method.

Background

The paper-surface gypsum board is a light building board made up by using gypsum and face-protecting paper as main raw materials, adding proper quantity of fibre, adhesive, coagulation regulator, foaming agent and water, and adopting the processes of calcining mature gypsum, mixing, forming, solidifying, cutting, drying and trimming. The paper-surface gypsum board has the characteristics of light weight, sound insulation, heat insulation, strong processability and simple and convenient construction method, thereby being widely applied to the building industry which develops rapidly and the related decorative material industry.

The paper-surface gypsum board is formed by spreading slurry between upper and lower protective paper sheets, forming the slurry into a fixed width and thickness by a forming device, wherein the theoretical water consumption required by hydration of calcined gypsum is about 18% of the weight of the calcined gypsum, and the water-paste ratio is often more than 70% in order to ensure good fluidity of gypsum slurry during the forming of the gypsum board. This excess free moisture needs to be evaporated from the gypsum board core during the drying process. In the process of water evaporation, the adhesive migrates to the interface between the surface layers of the protective paper and the gypsum core along with the evaporation of water, and the protective paper and the gypsum core are firmly bonded together after gelatinization. Therefore, the drying system is an important piece of equipment in the gypsum board production line. At present, the control precision of a gypsum board drying system is still to be improved, and the problems of low drying efficiency, easy embrittlement of board edges, easy failure of board outlet and the like exist.

Disclosure of Invention

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a gypsum board drying system, which comprises a board inlet area, a plurality of drying areas, a board outlet area and a circulating air system, wherein the board inlet area, the drying areas and the board outlet area are sequentially arranged, and the circulating air system comprises:

said board entry zone being configured to feed gypsum board to be dried into a first of said plurality of drying zones;

the drying areas are set to sequentially dry the gypsum boards to be dried and send the dried gypsum boards to the board outlet area, wherein the first drying area in the drying areas adopts transverse wind to dry the gypsum boards in a partitioning mode, and the other drying areas adopt longitudinal wind to dry the gypsum boards;

the board outlet area is configured to transport the dried gypsum board to a location for a subsequent process.

The embodiment of the invention also provides a gypsum board drying method, which comprises the following steps:

feeding gypsum board to be dried from a board entry zone to a first drying zone of said plurality of drying zones;

sequentially drying the gypsum boards to be dried in the plurality of drying zones, and conveying the dried gypsum boards to the board discharging zone, wherein the gypsum boards are dried by adopting a transverse air zone in the first drying zone of the plurality of drying zones, and the gypsum boards are dried by adopting a longitudinal air in the other drying zones;

the dried gypsum board is transported through the outlet section to the location for the next process.

Other aspects will be apparent upon reading and understanding the attached drawings and detailed description.

Drawings

FIG. 1 is a schematic illustration of a gypsum board drying system according to an exemplary embodiment of the present invention;

FIG. 2 is a schematic structural view of a circulating air system in accordance with an exemplary embodiment of the present invention;

FIG. 3 is a schematic structural view of a circulating air system according to another exemplary embodiment of the present invention;

FIG. 4 is a schematic diagram of the construction of a board edge drying apparatus according to an exemplary embodiment of the present invention;

FIG. 5 is a schematic view of a shutter mechanism and drive assembly of the board edge drying apparatus shown in FIG. 4;

FIG. 6 is a schematic diagram of an air outlet duct used in a gypsum board drying system according to an exemplary embodiment of the present invention;

FIG. 7 is a cross-sectional view of the outlet duct shown in FIG. 6;

FIG. 8 is a schematic view of the air outlet duct shown in FIG. 6 for drying gypsum boards;

FIG. 9 is a schematic illustration of a gypsum board drying system dryer coupled to an air inlet duct in accordance with an exemplary embodiment of the present invention;

FIG. 10 is a flow chart of a method of controlling the discharge of a gypsum board from a gypsum board dryer in accordance with an exemplary embodiment of the present invention;

FIG. 11 is a schematic illustration of a run table used by the publication control method shown in FIG. 10;

FIG. 12 is a flow chart of a gypsum board drying method according to an exemplary embodiment of the present invention;

FIG. 13 is a schematic view of the board edge drying arrangement of FIG. 4 in a drying zone.

Detailed Description

The present application describes embodiments, but the description is illustrative rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.

The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive concept as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive aspects to form yet another unique inventive aspect, as defined by the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not limited except as by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

Further, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other orders of steps are possible as will be understood by those of ordinary skill in the art. Therefore, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Further, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.

The gypsum board drying system comprises a board inlet area, a plurality of drying areas, a board outlet area and a circulating air system, wherein the board inlet area, the drying areas and the board outlet area are sequentially arranged, and the circulating air system comprises:

the drying areas are set to sequentially dry the gypsum boards to be dried and send the dried gypsum boards to the board outlet area;

The gypsum board drying system provided by the embodiment of the invention is subjected to one or more of the following technical improvements, so that the production efficiency and the product quality are greatly improved.

Heat source adaptive technology for drying

Combined drying technology

An exemplary embodiment of the present invention discloses a gypsum board drying system, which comprises a board inlet area, a plurality of drying areas, a board outlet area and a circulating air system, wherein the board inlet area, the plurality of drying areas and the board outlet area are sequentially arranged, and the circulating air system comprises:

An exemplary embodiment of a gypsum board drying system is shown in fig. 1 and includes a board entry zone 1, a first drying zone 2, a second drying zone 3, a third drying zone 4, a fourth drying zone 5, and a board exit zone 6, and a circulating air system 7. Wherein: the first drying area 2 adopts the horizontal wind subregion to dry the gypsum board, adopts the vertical wind to dry the gypsum board in second drying area 3, third drying area 4 and fourth drying area 5. In another embodiment, the gypsum board drying system may be divided into 3 or more than 5 drying zones, where the first zone uses cross-wind zones to dry the gypsum board, and the last two zones use longitudinal wind to dry the gypsum board.

In one example, the first drying zone may be subdivided into a plurality of small horizontal zones connected in sequence, for example, 2, 3, 4, 5 or more small horizontal zones, each of the small horizontal zones is provided with at least one heat circulation fan, and the gypsum board is dried by using the horizontal wind zones. The thermal power per small transverse zone is set to 250KW to 350KW, for example 300KW, which is an economical zoning method.

An exemplary embodiment of the present invention also discloses a gypsum board drying method applied to a gypsum board drying system including a board entry zone, a plurality of drying zones, and a board exit zone, as shown in fig. 12, the gypsum board drying method including:

step 70, feeding gypsum board to be dried from the board feeding zone to a first drying zone of the plurality of drying zones;

step 80, drying the gypsum boards to be dried in sequence in the plurality of drying zones, and conveying the dried gypsum boards to the board outlet zone, wherein the gypsum boards are dried in a first drying zone of the plurality of drying zones by adopting a transverse air zone, and the gypsum boards are dried in other drying zones by adopting a longitudinal air zone;

and step 90, conveying the dried gypsum board to the position of the next process through the board outlet area.

In one example, the first drying zone is divided into a plurality of small transverse zones, at least one heat circulation fan is arranged in each small transverse zone, and the gypsum boards are dried by adopting transverse air zones in sequence.

According to the embodiment of the invention, the drying is carried out in a transverse wind subarea manner at the early drying stage needing accurate control. The drying quality can be improved. And other subsequent drying areas are dried by adopting the traditional longitudinal airflow, so that the equipment cost can be reduced.

Natural gas, steam and coal hot air

The invention discloses a gypsum board drying system with natural gas as a heat source, which comprises a plurality of drying areas which are sequentially connected, wherein a dryer is arranged in each drying area, an air distribution chamber and a conveying roller way are arranged in each dryer, the conveying roller way sequentially penetrates through the air distribution chambers of different drying areas, and an air distribution flashboard for distributing heat to the roller way space is arranged in each air distribution chamber; the air distribution chamber is connected with a combustion chamber, and a circulating fan is arranged in the combustion chamber; the combustor is also internally provided with a combustor, the combustor is provided with a gas inlet pipeline and an air inlet pipeline, the air inlet pipeline is connected with the circulating fan, and the gas inlet pipeline and the air inlet pipeline are both provided with an air inlet flashboard; the dryer is also provided with a chimney, and the drying process comprises the following steps: s100, upper roll; s200, drying sequentially; s300, tail gas treatment; s400, rolling the lower roller; the embodiment of the invention utilizes the heat generated by combustion of natural gas to dry the gypsum plaster boards, simplifies equipment compared with the production process of a coal-fired factory and reduces pollution.

Energy-saving emission-reducing technology

Energy-saving and emission-reducing technology for drying thermal model

Energy-saving emission-reducing circulating air system

The gypsum board production line utilizes petrochemical fuels (coal, natural gas, etc.) to meet the heat energy requirement in the gypsum board production process. In the gypsum board drying stage, the moisture content of the wet gypsum board before drying is about 25 wt% to 35 wt%, and the moisture content after drying is reduced to below 1 wt%, wherein wt is weight percent. The water in the wet gypsum board is almost completely evaporated by the heat energy generated by the combustion of the fuel. The drying of gypsum boards can be divided into three stages: the pre-heating-acceleration drying stage may correspond to a first drying zone of the drying system, the constant-speed drying stage may correspond to a second drying zone of the drying system, and the deceleration drying stage may correspond to a third drying zone of the drying system. Each zone of the drying device is provided with a fan, hot air in each drying zone circulates through the fan, and the drying temperature of the first drying zone and the drying temperature of the second drying zone are higher than the drying temperature of the third drying zone. A large amount of waste gas generated in each stage of the drying step is directly discharged through a waste gas pipeline, and the waste heat in the waste gas is not reasonably recovered and fully utilized, so that huge waste of resources is caused.

In order to solve the problem of insufficient utilization of the residual heat in the exhaust gas during the drying process, an exemplary embodiment of the present invention provides a circulating air system 7 of a gypsum board drying system, as shown in fig. 2, the gypsum board drying system includes a first drying zone 110, a second drying zone 120, and a third drying zone 130, and a transition zone 101 disposed between the first drying zone 110 and the second drying zone 120, and between the second drying zone 120 and the third drying zone 130, wherein the first drying zone 110 may be a preheating acceleration drying section, the second drying zone 120 may be a constant speed drying section, the third drying zone 130 may be a deceleration drying section, and the drying temperature of the whole of the first drying zone 110 and the second drying zone 120 is higher than the drying temperature of the third drying zone 130. The first drying area 110, the second drying area 120 and the third drying area 130 are all provided with an exhaust gas pipeline and a hot air circulation pipeline, the exhaust gas pipelines of the first drying area 110 and the second drying area 120 are communicated with the hot air circulation pipeline of the third drying area 130, an exhaust gas fan is arranged on the exhaust gas pipelines of the first drying area 110 and the second drying area 120, and the exhaust gas fan is arranged to supply the exhaust gas of the first drying area 120 and the second drying area 130 into the hot air circulation pipeline of the third drying area 130. The first drying zone, the second drying zone and the third drying zone described above correspond to the longitudinal drying zone in the general diagram of the system.

As shown in fig. 2, the first drying zone 110 includes a first drying chamber 111 of the first dryer, a first hot air supply mechanism 112, and a first exhaust duct 113, the first hot air supply mechanism 112 is communicated with the first drying chamber 111 through a first hot air circulation duct 114, and the first exhaust duct 113 is disposed on the first hot air circulation duct 114. In one example, the first hot air supply mechanism 112 includes a first hot air source 112a and a first hot air blower 112b, the first hot air source 112a includes a first hot air outlet and a first hot air inlet communicated with the first hot air circulation duct 114, and the first hot air blower 112b is disposed on the first hot air circulation duct 114 and between the first hot air inlet and the first drying chamber 111. The number of the first air blowers 112b may be at least one, for example, 2 or 3, and a plurality of the first air blowers 112b are arranged in parallel.

The second drying zone 120 includes a second drying chamber 121 of the second dryer, a second hot air supply mechanism 122, and a second exhaust duct 123, the second hot air supply mechanism 122 is communicated with the second drying chamber 121 through a second hot air circulation duct 124, and the second exhaust duct 123 is disposed on the second hot air circulation duct 124. In one example, the second hot air supply mechanism 122 includes a second hot air source 122a and a second hot air blower 122b, the second hot air source 122a includes a second hot air outlet and a second hot air inlet communicated with the second hot air circulation duct 124, and the second hot air blower 122b is disposed on the second hot air circulation duct 124 and between the second hot air inlet and the second drying chamber 121. The number of the second air blowers 122b may be at least one, for example, 2 or 3, and a plurality of the second air blowers 122b are arranged in parallel.

The third drying zone 130 includes a third drying chamber 131, a third hot air supply mechanism 132 and a third exhaust pipeline 133, the third hot air supply mechanism 132 is communicated with the third drying chamber 131 through a third hot air circulation pipeline 134, and the third exhaust pipeline 133 is disposed on the third hot air circulation pipeline 134. In one example, the third hot air supply mechanism 132 includes a third hot air source 132a and a third hot air blower 132b, the third hot air source 132a includes a third hot air outlet and a third hot air inlet communicated with the third hot air circulation pipe 134, and the third hot air blower 132b is disposed on the third hot air circulation pipe 134 and between the third hot air inlet and the third drying chamber 131. The number of the third air blowers 132b may be at least one, for example, 2 or 3, and a plurality of the third air blowers 132b are arranged in parallel.

In the example shown in fig. 2, the first exhaust gas duct 113 and the second exhaust gas duct 123 are connected to the third hot air circulation duct 134 through the exhaust gas connection duct 140, and a position on the third hot air circulation duct 134 that communicates with the exhaust gas connection duct 140 is located between the third hot air outlet and the third drying chamber 131. The waste gas connecting pipeline 140 is provided with a first waste gas fan 141, and the first waste gas fan 141 is positioned between the position of the waste gas connecting pipeline 140 communicated with the waste gas pipeline and the third hot air circulating pipeline 134. The circulating air system 100 of this example further includes a moisture exhaust stack 150 communicated with an end portion of the third exhaust duct 134, a second exhaust air fan 135 is disposed between the third exhaust duct 134 and the moisture exhaust stack 150, and the exhaust air in the third drying chamber 131 is exhausted to the atmosphere through the moisture exhaust stack 150 under the action of the second exhaust air fan 135.

In this embodiment, first exhaust gas duct and second exhaust gas duct pass through the waste gas connecting tube and are connected with the third circulating line, can directly supply heat for the third drying chamber through third heated air circulation pipeline after the waste gas in first exhaust gas duct and the second exhaust gas duct mixes, and the waste gas heat in first exhaust gas duct and the second exhaust gas duct can satisfy the drying requirement of third drying chamber, and then reduces the hot-blast supply of third hot-blast source, has practiced thrift the energy. And the waste gas generated by the first drying area and the second drying area can be dried in the third drying chamber, so that the waste gas emission is reduced. Although the exhaust gas humidity in the first exhaust gas duct and the second exhaust gas duct is relatively high, the effect of the relatively high exhaust gas humidity on the drying of the gypsum board in the third drying chamber after homogenization in the third drying chamber is relatively small or negligible, since the length of the third drying zone is relatively long, which corresponds approximately to the sum of the lengths of the first drying zone and the second drying zone (the length of the first drying zone is approximately 24 meters, the length of the second drying zone is approximately 20 meters, and the length of the third drying zone is approximately 40 meters).

In an exemplary embodiment of the present invention, as shown in fig. 1, the circulating air system 100 further includes a mixer 142 configured to mix exhaust air discharged from the first exhaust air duct 113 and the second exhaust air duct 123, the mixer 142 is disposed on the exhaust air connecting duct 140 and near the third hot air circulating duct 134, and exhaust air in the first exhaust air duct 113 and the second exhaust air duct 123 is mixed in the mixer 142 and then blown into the third hot air circulating duct 134. In one example, a mixer 142 is disposed between the first exhaust gas fan 141 and the third heated air circulation duct 134.

In an exemplary embodiment of the present invention, as shown in fig. 1, the circulating air system 100 further includes a preheating zone 170 disposed at a start end of the first drying zone 111, a waste heat exchanger 160 disposed on the third waste air pipeline 133, and a preheating fan 161, an inlet of the waste heat exchanger 160 is communicated with the preheating fan 161 through a pipeline, an outlet of the waste heat exchanger 160 is communicated with the preheating zone 170 through a pipeline, and the preheating fan 161 is configured to blow fresh air into the waste heat exchanger 160 and blow the heat-exchanged fresh air into the preheating zone 170. The embodiment extracts heat in the exhaust gas through the waste heat exchanger 160, and applies the extracted heat to the preheating zone 170, so that the utilization rate of the waste heat of the exhaust gas is improved, and energy is saved.

Fig. 3 is a block diagram of a circulating air system of a gypsum board drying system according to another exemplary embodiment of the present invention. As shown in the figure, the exhaust gas connection pipeline 140 includes a main pipeline 140a and two auxiliary pipelines 140b communicated with the main pipeline 140a, the main pipeline 140a is communicated with the first exhaust gas pipeline 113 and the second exhaust gas pipeline 123, one of the two auxiliary pipelines 140b is communicated with the third hot air circulation pipeline 134, the other of the two auxiliary pipelines 140b is communicated with the third exhaust gas pipeline 133, and the first exhaust gas fan 141 is disposed on the main pipeline 140a and located on the main pipeline 140a and between the position communicated with the auxiliary pipeline 140b and the position communicated with the exhaust gas pipeline on the main pipeline 140 a. The exhaust gas in the first and second exhaust gas ducts 113 and 123 is directly discharged through the sub-duct 140b communicating with the third exhaust gas duct 133 without being circulated into the third drying chamber 131. In one example, a mixer 142 is provided on the secondary duct 140b in communication with the third heated air circulation duct 134.

Application of heat exchanger for removing waste heat from water

In an exemplary embodiment of the present invention, as shown in fig. 2, the circulating air system 100 further includes a white elimination transducer 180, and the white elimination transducer 180 is disposed on the third exhaust duct 133 and between the waste heat exchanger 160 and the dehumidifying stack 150. Generally, the exhaust gas discharged from the waste heat exchanger 160 can be directly discharged from a chimney, and the exhaust gas has a high temperature and can be condensed with cold air at the position of the chimney opening to generate white mist. Some places with strict environmental protection require whitening. The desulphating heat exchanger 180 is just reducing the temperature again below the dew point. The inlet of the white eliminating transducer 180 is communicated with the white eliminating fan 181 through a pipeline, the outlet of the white eliminating transducer 180 is communicated with the dehumidifying chimney 150 through a pipeline, heat extracted by the white eliminating transducer 180 can be used for heating cold water in the dehumidifying chimney 150, and the heated cold water can be used for showering and the like. The tail gas after waste heat utilization enters a white heat removal heat exchanger, so that the emission of white fog can be reduced.

Waste heat utilization technology

An exemplary embodiment of the invention provides a dryer waste heat recycling system and a dryer waste heat recycling method. According to the system and the method for recycling the waste heat of the drying machine, provided by the invention, the water in the waste gas of the drying machine is vaporized into hot water to be recycled into the batching system, so that the recycling of the waste water is realized, the energy and water resources are saved, the temperature of slurry can be increased, the smooth drying process of the gypsum board is facilitated, the energy consumption in the drying process is reduced, the production is facilitated, and the production cost is effectively reduced.

Heat preservation and insulation technology

An exemplary embodiment of the present invention provides a dryer deck mechanism including a first channel frame and a second channel frame; the first channel steel frame and the second channel steel frame are both vertically arranged and are vertically arranged and fixedly connected; a heat insulation material layer is arranged between the third side of the first channel steel frame and the second side of the second channel steel frame; the dryer cover plate mechanism also comprises at least two heat-insulating layers; the at least two heat preservation layers are vertically arranged along the first side of the first channel steel frame and the first side of the second channel steel frame. According to the technical scheme, the heat insulation material between the two layers of channel steel frames effectively prevents heat inside the dryer from being conducted out through the channel steel frames, and meanwhile, at least two layers of heat insulation material layers also can effectively prevent heat conduction. The cover plate mechanism of the drying machine has good heat insulation performance and can be suitable for a gypsum board drying machine.

An exemplary embodiment of the present invention provides a dryer door sealing mechanism, which includes a first bead and a second bead, both of which are ring structures, the first bead is located at an outer side of the second bead, and a sealing material layer is disposed between the first bead and the second bead. The dryer door sealing mechanism further comprises a plurality of fixing lines, the fixing lines vertically penetrate through the first pressing strip and the second pressing strip, and the sealing material layer is fixed between the first pressing strip and the second pressing strip. The door sealing mechanism of the dryer provided by the invention not only ensures that the door has good sealing performance and is not easy to damage after being used for a long time, but also effectively prevents heat in the dryer from being conducted out.

Plate edge drying quality control technology

Edge cooling technique

On the gypsum board production line, the gypsum board conveys along the fore-and-aft direction, and bilateral symmetry is provided with the air-blocking curtain between the adjacent gypsum board in upper and lower layer, and two air-blocking curtains separate the face of two flange limits and gypsum board about with the gypsum board, and the flange limit of gypsum board is the wedge limit, and thickness is thin relatively. The hot air at 140-190 degrees is horizontally pumped into the space between the left wind shield curtain and the right wind shield curtain and blown forwards, the hot air at 140-190 degrees directly dries the board surface of the gypsum board, the hot air at 140-190 degrees indirectly dries the board edge of the gypsum board through the wind shield curtains through heat radiation, however, the inventor researches and discovers that in some scenes, the hot air at 140-190 degrees can blow the wind shield curtains off and blow towards the board edge, and the hot air at 140-190 degrees directly dries the board edge of the gypsum board, so that the board edge of the gypsum board is overheated and becomes brittle. Research also finds that the board edges are dried by hot air not higher than a certain threshold value, such as about 110-115 degrees, so that the problem that the board edges are overheated and become brittle is avoided. In one example, the set temperature is set to 70-100 degrees. The set temperature, the critical temperature at which the board edges become brittle due to overheating, and the air temperature at which the board surface of the gypsum board is dried may vary depending on the parameters of the gypsum board, and may be obtained by those skilled in the art through experiments, etc.

An exemplary embodiment of the present invention provides a board edge drying apparatus 9 for gypsum boards, as shown in fig. 1 and 4. The board edge drying device 9 of the present embodiment is used for drying the board edge of the gypsum board, and includes: the main air duct 200 is vertically arranged, a plurality of sub air ducts 210 are axially arranged on the side wall of the main air duct 200 at intervals, and an air pumping device 220 is connected with an air inlet of the main air duct 200 and used for pumping air with a set temperature into the main air duct 200, wherein the set temperature is not higher than the critical temperature of the set plate edge which is overheated and embrittled, and the axial direction in the figure is the up-down direction. Referring also to fig. 13, the main duct 200, sub-ducts 210, wind screen 1001 and gypsum board 1002 are shown in the drying zone.

The air pumping device 220 of the plate edge drying device is connected with the air inlet of the main air duct 200, air with set temperature is pumped into the main air duct 200, the air with the set temperature is blown out from the plurality of sub air ducts 200 and blown to a plurality of plate edges at intervals up and down in a one-to-one correspondence manner, the plurality of plate edges are simultaneously dried, and the plate edge drying efficiency is ensured. The set temperature is not more than the critical temperature of plate edge overheating and embrittlement, and can be obtained through experiments and tests, so that the plate edge overheating and embrittlement during drying are avoided. After the plate edge drying device of the embodiment is used, when the air for drying the plate surface blows the wind-shielding curtain and blows the plate edge, the air and the set temperature can exchange heat and the temperature is reduced, so that the problem that the plate edge is overheated and becomes brittle caused by the fact that the air for drying the plate surface blows the wind-shielding curtain and blows the plate edge is solved, and the performance of the manufactured gypsum board is better.

In one example, the air pumping device 220 is a dryer, the air pumped by the dryer is hot air heated to a set temperature by the dryer, and the air sucked by the dryer is external low-temperature air; in another example, the air pumping device 220 is an air pump, and the air pumped by the air pump is hot air which is used for drying the surface of the gypsum board and then cooling to 70-100 ℃, so that the waste heat is fully utilized, and the energy utilization rate is effectively improved;

in an exemplary embodiment of the present invention, as shown in fig. 5, the board edge drying device further includes a shutter mechanism disposed on the sub-air duct 210 for adjusting the air output of the sub-air duct 210, so as to better dry the board edge. In an example, the shutter mechanism includes a shutter 230 and a driving assembly 240, and the driving assembly 240 is connected to the shutter 230 for driving the shutter 230 to move so as to adjust the air output of the plurality of sub-ducts 210. In one example, the driving assembly 240 is a lead screw nut structure that drives the movement of the shutter 2, as shown in fig. 5. The driving assembly 240 may also be a torsion bar structure for driving the swing of the shutter, and the screw may also be replaced by a bolt, and the bolt is rotated to drive the shutter 230 to move.

In one example, the plurality of shutters are arranged on the plurality of sub-air ducts in a one-to-one correspondence manner, the plurality of shutters are driven to synchronously move or swing through a connecting rod structure, so that the air output of the sub-air ducts is synchronously adjusted, and the driving assembly is of a connecting rod structure; in another example, the shutters 310 are correspondingly disposed on the sub-ducts 200 one by one, and the shutters are driven by the driving components to move or swing, so as to adjust the air output of the sub-ducts 200, respectively.

In an example, the sub-duct 210 is configured as a folded flat duct or a straight flat duct, which can achieve the purpose of the present application, and the purpose of the present application does not depart from the design concept of the present invention, and therefore, the present application shall not be repeated herein, and all of the present application shall fall within the protection scope of the present application.

An exemplary embodiment of the present invention provides a board edge drying method including: and blowing hot air with a set temperature from the sub-air channel to the board edge of the gypsum board through the board edge drying device to dry the board edge of the gypsum board, wherein the set temperature is not higher than the critical temperature for the board edge to become brittle through overheating, and the board edge drying device provided by any one of the embodiments is adopted. According to the board edge drying method, the board edge drying device blows hot air with a set temperature to the board edges of the gypsum boards from the sub air channels to dry the board edges of the gypsum boards, the set temperature is not higher than the critical temperature for the board edges to become brittle through overheating, and the board edges cannot become brittle when being dried; when the air for drying the board surface blows the wind-shield curtain to blow to the board edge, the air can exchange heat with the air with the set temperature and the temperature is reduced, so that the problem that the board edge is overheated and becomes brittle caused by the fact that the wind-shield curtain blows to the board edge when the air for drying the board surface is improved, and the manufactured gypsum board has better performance.

In one example, the hot air is the hot air of cooling to 70 ~ 100 degrees after to the face drying of gypsum board, and make full use of waste heat promotes energy utilization, and the settlement temperature is 70 ~ 100 degrees.

In summary, in the plate edge drying device provided in the above embodiment of the present invention, the air pumping device is connected to the air inlet of the main air duct, and pumps air at a set temperature into the main air duct, the air at the set temperature is blown out from the plurality of sub air ducts and blown to the plurality of plate edges at intervals up and down in a one-to-one correspondence manner, and the plurality of plate edges are simultaneously dried, so that the plate edge drying efficiency is ensured, the set temperature is not greater than the critical temperature for plate edge overheating and embrittlement, and the plate edges are prevented from overheating and becoming brittle when being dried; when the air for drying the board surface blows the wind-shield curtain to blow to the board edge, the air can exchange heat with the air with the set temperature and the temperature is reduced, so that the problem that the board edge is overheated and becomes brittle caused by the fact that the air for drying the board surface blows the wind-shield curtain to blow to the board edge is solved, and the performance of the manufactured gypsum board is better.

Diversion technique

The invention discloses a flow guide device of a gypsum board dryer, which comprises a plurality of layers of working channels which are sequentially arranged from top to bottom, wherein any one layer of working channel of the plurality of layers of working channels comprises a first flow guide plate and a second flow guide plate which are symmetrically arranged at two sides of the working channel, the first flow guide plate and the second flow guide plate are respectively provided with a plurality of uniformly distributed air guide baffles which are arranged at a first preset angle alpha with the first flow guide plate and the second flow guide plate, and the first preset angle alpha is smaller than 90 degrees. This guiding device helps reducing stoving in-process gypsum board limit portion heat, reduces the excessive internal heat problem of gypsum board limit portion to improve the quality of gypsum board.

Plate core drying quality control technology

Drying air distribution technology

Air distribution shutter adjustment

The invention discloses an air distribution gate plate adjusting device of a paper-surface gypsum board dryer, which comprises a dryer, wherein a plurality of layers of air chambers are arranged in the dryer in parallel from top to bottom, the air chambers are divided into a plurality of air channels through partition plates, a group of air distribution gate plate assemblies are arranged in each layer of air chamber, adjusting rod assemblies which correspond to the air distribution gate plate assemblies one by one are fixedly arranged outside the dryer, the air distribution gate plate assemblies are connected with the adjusting rod assemblies through adjusting mechanisms, each air distribution gate plate assembly comprises a fixed rod, the fixed rod is formed by sequentially sleeving a plurality of connecting pipes with the same number of air channels, and the periphery of each connecting pipe is connected with a gate plate; according to the embodiment of the invention, the rotation angle of the corresponding air distribution flashboard assembly inside the dryer is controlled by the movement of the adjusting rod assembly, so that the problem that the opening of the internal flashboard can be adjusted only by opening the door of the dryer after the dryer is stopped in the prior art is solved.

Air outlet duct (air injection duct)

The gypsum board drying system comprises an air outlet duct, the air outlet duct is horizontally arranged between adjacent upper and lower gypsum board lines, and the gypsum boards produced on the upper and lower gypsum board lines are dried by blowing hot air parallel to the upper and lower gypsum board lines. The technical problem to be solved by the person skilled in the art is to dry the gypsum board more quickly by means of a gypsum board drying apparatus.

An exemplary embodiment of the present invention provides an air outlet duct used in a gypsum board drying system, which can be used in a longitudinal air flow dryer. As shown in fig. 6, the air duct body 310 is provided, a main channel 320 is provided in the air duct body 310, an auxiliary channel 330 is provided on at least one of the top wall and the bottom wall of the air duct body 310, the main channel 320 communicates with the auxiliary channel 330, and the axis of the auxiliary channel 330 is inclined with respect to the axis of the main channel 320. The hot air blown from the auxiliary passage 330 is obliquely blown toward the gypsum boards 10, and the hot air blown from the main passage 320 is blown in parallel between the gypsum boards 10, and the drying effect of the oblique hot air is superior to that of the parallel hot air, so that the gypsum boards 10 are dried more quickly compared with the related art.

In an example, as shown in fig. 7 and 8, an axis of the auxiliary channel 330 is inclined toward the air outlet side of the main channel 320 from inside of the main channel 320 to outside of the main channel 320, that is, the auxiliary channel 330 is inclined toward the front side of the main channel 320 and blows air toward the gypsum board, low-temperature hot air formed after heat exchange between the inclined hot air and the gypsum board is conveyed forward along with parallel hot air, and finally blows out a gypsum board line from the front of the air-out duct, so that obstruction to subsequent air-out of the duct body 310 can be reduced, and rapid drying of the gypsum board is facilitated.

In one example, the diameter of the secondary channel 330 is 10-20 mm, such as 16 mm; the inclination angle of the axis of the auxiliary channel 330 relative to the axis of the main channel 320 is 5-35 degrees, such as 15 degrees; the size of the area of the air duct body 310 where the auxiliary channels 330 are arranged is 0.6m × 0.5m to 1.6m × 1.5m, such as 1.15m × 1.0 m; adopt the air-out wind channel that above-mentioned three groups of data were made, not only fast to the drying rate of gypsum board, also better to the drying uniformity of gypsum board moreover.

In one example, as shown in fig. 6 to 8, the duct body 310 is provided with auxiliary channels 330 on both the top wall and the bottom wall; in another example, only the top wall of the duct body 310 is provided with the auxiliary passage 330; in another example, only the bottom wall of the duct body 310 is provided with the auxiliary passage 330; the above can achieve the object of the present application. In an example, as shown in fig. 6, the main channel 320 may include a plurality of transverse sub-channels 321, and the plurality of sub-channels 321 may be two, three, four, five, or six, etc., all of which achieve the purpose of the present application. In one example, as shown in fig. 7 and 8, the primary channel 320 and the secondary channel 330 are both straight channels. In an example, the air outlet duct may be a metal part, a rubber part, or a plastic part, which can achieve the purpose of the present application, and the purpose of the present application does not depart from the design concept of the present invention, and therefore, the present application is not repeated herein and all of the present application shall fall within the protection scope of the present application.

In one example, as shown in fig. 9, the gypsum board drying apparatus further includes: the dryer 300 is disposed beside the air outlet duct, and an air outlet of the dryer 300 is connected to an air inlet of the main channel 320, so that the dryer 300 blows hot air into the air outlet duct. Wherein, be provided with flashboard and guiding mechanism on the desiccator 300, through the swing angle of guiding mechanism adjustment flashboard, can control the air output of desiccator 300.

Plate surface appearance quality control technology

The invention discloses a preparation method of a paper-surface gypsum board and a dryer, wherein the preparation method of the paper-surface gypsum board comprises the following steps: providing a gypsum board, and placing the gypsum board on a conveying roller way; the gypsum board is driven by the conveying roller way to be cut and dried in sequence; the gypsum board is dried by a dryer, and a conveying roller way close to one side of an inlet of the dryer and the gypsum board are preheated before the gypsum board enters the dryer; the dryer is used for drying in the preparation method of the paper-surface gypsum board; the preparation method of the paper-surface gypsum board can reduce solid particles on a conveying roller way and reduce the influence of the solid particles on the surface flatness of the gypsum board.

Plate core quality control technology

The invention discloses a control method of a temperature and humidity control system of a gypsum board drying system, which comprises the following steps: s100, setting temperature and humidity, and setting a working temperature and humidity range for the whole system through an upper computer; s200, temperature detection and control, namely detecting the working temperature in the dryer through a temperature detection device and adjusting the temperature according to the detected temperature; s300, humidity detection and control, under the prerequisite of temperature control in the settlement scope, detect the inside humidity of desiccator through humidity detection device, and carry out humidity control according to the humidity that detects, rationally judge the inside work humiture of desiccator through automatic detection mode, and carry out automated regulation through temperature regulation device and humidity control device, can realize the automatic stable control of this set of equipment, can carry out real time monitoring again, and make humanized alarm processing on the host computer, make the working process of whole desiccator more safe and stable, improve the shaping quality of gypsum board.

Dry end plate discharging system

Plate discharging control technology of dryer

The invention discloses a board discharging control system of a dryer and a control method thereof, wherein the board discharging control system comprises a load collecting and conveying unit and a board placing and conveying unit, a shunting and conveying unit for shunting and storing products is arranged between the load collecting and conveying unit and the board placing and conveying unit, short-time storage and conveying units are arranged on two sides of the shunting and conveying unit, pressure sensors are arranged on the shunting and conveying unit and the short-time storage and conveying unit, a monitoring unit is arranged on the board placing and conveying unit, a primary regulating and controlling unit in communication connection with the monitoring unit is arranged on the shunting and conveying unit, and a secondary regulating and controlling unit in communication connection with the monitoring unit is arranged on the short-time storage and conveying unit; the scheme can store products in a short time, provides some maintenance time for the cutting mechanism, avoids stopping to maintain the cutting mechanism, and causes stagnation of production flow equipment such as a dryer and the like, thereby reducing the influence on production work.

Plate discharging redundancy technology of dryer

At present, the board is all gone out according to predetermined fixed speed when going out the board in the play board district of gypsum board desiccator, and this scheme makes in case the board speed of the closed drying zone of desiccator is too fast, makes the panel that reachs in the board district lead to the fact and piles up, in addition, in case the follow-up equipment of desiccator breaks down, makes the desiccator have to shut down in step, seriously influences production efficiency, and frequent opening and shutting down of desiccator, seriously influences drying effect.

An exemplary embodiment of the present invention provides a method for controlling the discharge of a gypsum board dryer. As shown in fig. 1, a board outlet section 6 of a gypsum board drying system is located after a drying section (also referred to as a closed drying section) and comprises a plurality of board outlet sections connected in sequence, wherein the plurality of board outlet sections at least comprises a first board outlet section connected with the drying section and an nth board outlet section which is far away from the drying section and located at the tail end of the board outlet section 6, and N is a positive integer greater than or equal to 2, as shown in fig. 10, the method comprises:

s11, detecting whether a board exists in the Nth board discharging section or not in real time and detecting a first conveying speed of the Nth board discharging section in the transportation process of the boards continuously output in the drying area in the board discharging area;

and S12, adjusting the first conveying speed and/or the conveying speeds of the other plate-out sections except the Nth plate-out section in the plate-out area according to the first detection result.

In an exemplary embodiment, the specific number of the plurality of outgoing board segments may be defined according to requirements, and is not limited herein, for example, N — 4 may be taken, that is, the plurality of outgoing board segments may include: the first plate discharging section, the second plate discharging section, the third plate discharging section and the fourth plate discharging section, wherein the first plate discharging section is connected with the drying area, and the fourth plate discharging section can be used as the tail end of the plate discharging area 6. Hereinafter, the first plate outlet section, the second plate outlet section, the third plate outlet section and the fourth plate outlet section will be described as an example.

In an exemplary embodiment, whether a board exists on the first board discharging section, the second board discharging section, the third board discharging section and the fourth board discharging section and the speed of each of the first board discharging section, the second board discharging section, the third board discharging section and the fourth board discharging section can be detected in real time, so that the conveying speed of each board discharging section can be adjusted in real time according to the judgment result.

In an exemplary embodiment, the fourth discharging section is the discharging section which is most closely related to the subsequent equipment process of the dryer, and whether there is a plate or not and the conveying speed are directly related to the plate redundancy degree of the whole discharging area 6.

In an exemplary embodiment, the control of the first, second, third, and fourth tap segments may include four schemes:

according to the first scheme, the conveying speeds of the first plate discharging section, the second plate discharging section, the third plate discharging section and the fourth plate discharging section are controlled according to whether plates exist on the fourth plate discharging section and the relation between the operating speed of the fourth plate discharging section and the conveying speeds of the first plate discharging section, the second plate discharging section and the third plate discharging section (the first plate discharging section, the second plate discharging section and the third plate discharging section can be collectively called as other plate discharging sections);

controlling the conveying speeds of the first plate discharging section, the second plate discharging section, the third plate discharging section and the fourth plate discharging section only according to whether plates are arranged on the first plate discharging section, the second plate discharging section, the third plate discharging section and the fourth plate discharging section;

and controlling the conveying speeds of the first plate discharging section, the second plate discharging section, the third plate discharging section and the fourth plate discharging section according to whether plates exist on the fourth plate discharging section, whether plates exist on other plate discharging sections and the relation between the operating speed of the fourth plate discharging section and the conveying speeds of other plate discharging sections.

Scheme one is described in detail below:

in the exemplary embodiment of the present application, after determining whether there is a plate on the fourth plate discharging section and the relationship between the operating speed of the fourth plate discharging section and the conveying speeds of the other plate discharging sections, only the conveying speed of the fourth plate discharging section may be controlled, only the conveying speeds of the first plate discharging section, the second plate discharging section, and the third plate discharging section may be controlled, and the conveying speeds of the fourth plate discharging section and the other plate discharging sections may be controlled at the same time. Wherein, the conveying speed of any one or more of the first plate discharging section, the second plate discharging section and the third plate discharging section can be controlled simultaneously.

1. When the conveying speed of the fourth outgoing plate section (i.e., the first conveying speed) is controlled:

in an exemplary embodiment of the present application, adjusting the first conveyance speed according to the first detection result may include:

when the Nth plate outlet section is not provided with plates, if the first conveying speed is greater than or equal to the conveying speed of the other plate outlet sections, reducing the first conveying speed; maintaining a current first conveyance speed or reducing the first conveyance speed if the first conveyance speed is less than the conveyance speeds of the other outgoing lane sections;

and when the Nth plate outlet section has plates, controlling the Nth plate outlet section to stop running.

In the exemplary embodiment of the present application, when the fourth outgoing board section is free of boards, the first conveying speed may be reduced to a very small preset speed, and the operation of the fourth outgoing board section may also be directly stopped.

In an exemplary embodiment of the present application, when the fourth board discharging section has boards, whether the first conveying speed is greater than the conveying speeds of the other board discharging sections or the first conveying speed is less than or equal to the conveying speeds of the other board discharging sections, the operation of the fourth board discharging section may be directly stopped, so as to avoid that when the subsequent equipment of the dryer fails, if the fourth board discharging section continues to convey boards to the subsequent equipment, the failure of the subsequent equipment is aggravated.

2. When only the conveying speeds of the first plate discharging section, the second plate discharging section and the third plate discharging section (namely the conveying speeds of other plate discharging sections) are controlled:

in an exemplary embodiment of the present application, adjusting the conveying speed of the other outgoing board segment according to the first detection result may include:

when the Nth plate outlet section has no plate, if the first conveying speed is greater than or equal to the conveying speed of the other plate outlet sections, or the first conveying speed is less than the conveying speed of the other plate outlet sections, increasing the conveying speed of the other plate outlet sections;

when the Nth plate discharging section has plates, if the first conveying speed is higher than the conveying speeds of the other plate discharging sections, reducing the conveying speeds of the other plate discharging sections or controlling the other plate discharging sections to stop running; and controlling the other plate discharging sections to stop running if the first conveying speed is less than or equal to the conveying speed of the other plate discharging sections.

In the exemplary embodiment of the present application, when the fourth deck has no plate, the travel of the conveyance speeds (one or more of the conveyance speeds of the first deck, the second deck, and the third deck) of the other decks can be increased so as to ensure that the sheet conveyance efficiency can be improved as much as possible without causing serious redundancy, regardless of whether the first conveyance speed is greater than the conveyance speed of the other deck or whether the first conveyance speed is less than or equal to the conveyance speed of the other deck.

In the exemplary embodiment of the present application, if the first conveying speed is greater than the conveying speeds of the other outgoing board sections, and still a board is on the fourth outgoing board section, it indicates that a board stacking phenomenon may have occurred (at this time, it may be that a subsequent device has a fault), at this time, the conveying speeds of the other outgoing board sections may be further reduced or the other outgoing board sections may be controlled to stop operating, and at least the conveying speed of the third outgoing board section may be stopped (especially when a board exists on the third outgoing board section), so as to avoid further stacking of boards on the fourth outgoing board section. If the fourth board outlet section is provided with boards, and the first conveying speed is less than or equal to the conveying speeds of the other board outlet sections, it can be determined that the conveying speeds of the other board outlet sections currently cause pressure on the fourth board outlet section, and if a fault occurs in subsequent equipment, the drier is forced to stop, so that the other board outlet sections can be controlled to stop running at the moment, so that the board outlet pressure of the fourth board outlet section is reduced, and the shutdown risk of the drier is reduced.

3. When the conveying speeds of the first plate discharging section, the second plate discharging section, the third plate discharging section and the fourth plate discharging section are all controlled:

in an exemplary embodiment of the present application, adjusting the first conveying speed and the conveying speeds of the other outgoing board segments according to the first detection result may include:

when the Nth plate outlet section has no plate, if the first conveying speed is greater than or equal to the conveying speed of the other plate outlet sections, reducing the first conveying speed or controlling the Nth plate outlet section to stop running, and increasing the conveying speed of the other plate outlet sections; if the first conveying speed is lower than the conveying speeds of the other plate discharging sections, controlling the Nth plate discharging section to stop running and increasing the conveying speeds of the other plate discharging sections;

when the Nth plate discharging section has plates, if the first conveying speed is higher than the conveying speeds of other plate discharging sections, reducing the first conveying speed or controlling the Nth plate discharging section to stop running, and reducing the conveying speeds of other plate discharging sections; and if the first conveying speed is less than or equal to the conveying speed of the other plate discharging sections, controlling the Nth plate discharging section to stop running and reducing the conveying speed of the other plate discharging sections.

In an exemplary embodiment of the present application, if the first conveying speed is greater than or equal to the conveying speed of the other outgoing lane, and the fourth outgoing lane has no board, and it is possible that the conveying speed of the other outgoing lane differs too much from the conveying speed of the fourth outgoing lane, the first conveying speed may be temporarily reduced or the fourth outgoing lane may be controlled to stop operating, and at the same time, the conveying speed of the other outgoing lane may be increased; so that the plate can be output uniformly, and the phenomena of non-uniformity, such as no plate in the plate outlet area 6, frequent accumulation and the like can not be caused. In addition, temporarily reducing the first conveying speed or controlling the fourth plate discharging section to stop running can enable the follow-up equipment to pass the fault at the moment, and the speed of outwards conveying the plates by the fourth plate discharging section is reduced to the minimum so as to reduce the stress on the follow-up equipment.

In an exemplary embodiment of the present application, if the first conveying speed is lower than the conveying speed of the other outgoing boards, and the fourth outgoing board is without boards, a third outgoing board equal-breaking (i.e., without boards) phenomenon may occur, and at this time, the fourth outgoing board may be controlled to stop running to wait for the first outgoing board, the second outgoing board and the like in front to convey boards. Meanwhile, the conveying speed of the other plate discharging sections can be increased; the plate conveying speed of the first plate discharging section and the second plate discharging section is improved, and therefore the plate discharging efficiency of the plate discharging area 6 is improved. At this time, the fourth plate discharging section has no plate, so even if the subsequent equipment fails, the fourth plate discharging section cannot cause approved pressure and influence on the subsequent equipment, and therefore the plate discharging section before the fourth plate discharging section can still continue to normally operate.

In an exemplary embodiment of the present application, the fourth board exiting section has boards, and at this time, whether the first conveying speed is greater than the conveying speeds of the other board exiting sections or the first conveying speed is less than or equal to the conveying speeds of the other board exiting sections, the first conveying speed may be reduced, and even the fourth board exiting section may be controlled to stop operating, and the conveying speeds of the other board exiting sections may be reduced to reduce the speed at which the other board exiting sections continue to convey boards to the fourth board exiting section, so as to reduce the pressure of the fourth board exiting section, avoid causing the boards to be stacked, and avoid that the dryer has to stop operating once a failure occurs in the subsequent equipment.

Scheme two can be described in detail below.

In an exemplary embodiment of the present application, the first detection result may include: the Nth plate outlet section is provided with no plate or the Nth plate outlet section is provided with a plate;

the method may further comprise: detecting whether the other plate-out sections have plates or not after detecting that the Nth plate-out section has no plates or the Nth plate-out section has plates; and adjusting the first conveying speed and/or the conveying speed of the other plate discharging sections according to a second detection result.

In an exemplary embodiment of the present application, after detecting that the fourth board output section has no board or the fourth board output section has a board, detecting whether the other board output sections have boards or not; and adjusting the first conveying speed and/or the conveying speed of the other plate discharging sections according to a second detection result.

In an exemplary embodiment of the present application, the adjusting the first conveying speed and/or the conveying speed of the other outgoing board segment according to the second detection result may include:

when the plurality of plate discharging sections are provided with plates, controlling the plurality of plate discharging sections to stop running;

and when the plurality of plate discharging sections have no plates, controlling the Nth plate discharging section to stop running, and reducing the conveying speed of the plurality of plate discharging sections, or controlling the plurality of plate discharging sections to stop running.

In the exemplary embodiment of the application, if it is detected that all of the first board discharging section, the second board discharging section, the third board discharging section and the fourth board discharging section have boards, it can be predicted that the probability that boards will be stacked is relatively high, and once the subsequent equipment fails, the probability that the dryer is stopped is relatively high.

In the exemplary embodiment of the present application, if it is detected that none of the first board outlet section, the second board outlet section, the third board outlet section, and the fourth board outlet section has boards, at this time, a problem may occur in the board inlet area 1 and/or the drying area 2, and therefore, at this time, the fourth board outlet section may be controlled to stop operating to reduce power consumption, and other operating sections may reduce the speed to prepare to convey boards sent out from the drying area 2 at any time. The first plate discharging section, the second plate discharging section, the third plate discharging section and the fourth plate discharging section can also be stopped from running and restarted after the plates are sent out from the drying area 2, so that on one hand, the power consumption can be reduced, and on the other hand, more plate conveying time can be provided when the follow-up equipment breaks down, so that more time can be provided for the follow-up equipment maintenance.

In an exemplary embodiment of the present application, when at least one of the plurality of outgoing boards has a board, the adjusting the first conveying speed and/or the conveying speeds of the other outgoing boards according to the second detection result may include:

if the Nth plate outlet section has no plate, controlling the plate outlet section with the plate closest to the Nth plate outlet section and all the plate outlet sections between the plate outlet section with the plate and the Nth plate outlet section to increase the conveying speed;

if the Nth plate discharging section has plates and the other plate discharging sections have no plates, controlling the Nth plate discharging section to stop running and reducing the conveying speed of the other plate discharging sections; if the Nth plate discharging section has plates and one or more plate discharging sections which are continuously adjacent to the Nth plate discharging section on the other plate discharging sections have plates, controlling the Nth plate discharging section to stop running, controlling one or more plate discharging sections which are continuously adjacent to the Nth plate discharging section to stop running, and reducing the conveying speed of the plate discharging sections without plates on the other plate discharging sections; and if the Nth plate discharging section has plates, controlling the Nth plate discharging section to stop running and increasing the conveying speed of other plate discharging sections when one or more plate-free plate discharging sections are included between the plate discharging section with the plate closest to the Nth plate discharging section and the Nth plate discharging section in other plate discharging sections.

In an exemplary embodiment of the present application, if the fourth board exiting section has no board, it indicates that the conveying speed of other board exiting sections is slow, the board exiting section (which may be any one of the first board exiting section, the second board exiting section, and the third board exiting section) closest to the fourth board exiting section may be controlled to increase the conveying speed, and all the board exiting sections between the board exiting section and the fourth board exiting section may be controlled to increase the conveying speed; so as to ensure the normal board conveying efficiency. At the moment, no plate is arranged on the fourth plate discharging section, so that even if the follow-up equipment fails, the fourth plate discharging section cannot cause pressure on the follow-up equipment, and the normal operation of the dryer is not influenced.

In an exemplary embodiment of the present application, if there is a plate in the fourth plate discharging section, and none of the first plate discharging section, the second plate discharging section, and the third plate discharging section has a plate, the fourth plate discharging section may be controlled to temporarily stop running to wait for other plate discharging sections to transport the plate, and at this time, the first plate discharging section, the second plate discharging section, and the third plate discharging section may also temporarily reduce the speed to wait for the plate sent out by the drying area 2.

In an exemplary embodiment of the application, if the fourth board outlet section has boards and the third board outlet section has boards (or the second board outlet section and the third board outlet section have boards, or the first board outlet section, the second board outlet section and the third board outlet section have boards), the board outlet sections with boards can be controlled to stop running, so that the pressure of the fourth board outlet section is reduced, the boards are prevented from being stacked, and the dryer has to be stopped when the follow-up equipment fails.

In the exemplary embodiment of the present application, if there is a plate in the fourth plate discharging section, and there is no plate in the third plate discharging section, and there is a plate in the second plate discharging section (or there is no plate in the second plate discharging section and the third plate discharging section, and only there is a plate in the first plate discharging section), the fourth plate discharging section may be controlled to stop running to wait for conveying the plate, and the conveying speed of the other plate discharging sections (the first plate discharging section, the second plate discharging section, and the third plate discharging section) is increased to quickly convey the plate to the fourth plate discharging section.

In an exemplary embodiment of the present application, the second scheme may adjust the first conveying speed and/or the conveying speed of the other outgoing board segment directly according to a preset operation table; wherein, the operation table comprises: a panel/non-panel information group and a speed information group; each plate-contained/plate-free information group corresponds to a group of speed information groups; each information group with or without board comprises an information combination form of a plurality of board-out sections with or without boards; each velocity information set includes a velocity combination of a plurality of outgoing plate segments corresponding to a plate/non-plate information set.

In an exemplary embodiment of the present application, one embodiment of a run list may be as shown in FIG. 3.

In the exemplary embodiment of the present application, A, B, C, D represents a first outlet section, a second outlet section, a third outlet section, and a fourth outlet section, respectively, 1 represents presence of a plate, 0 represents absence of a plate, e represents stop operation, l represents low speed operation, and h represents high speed operation.

The third scheme will be described in detail below.

In an exemplary embodiment of the present application, the method may further include: after detecting whether the Nth plate outlet section has plates and the first conveying speed of the Nth plate outlet section, detecting whether any one or more plate outlet sections in other plate outlet sections have plates and the conveying speed of the one or more plate outlet sections;

and adjusting the conveying speed of any one or more of all the plate outlet sections of the plate outlet area according to the third detection result.

In the exemplary embodiment of the present application, it may be simultaneously detected whether there are plates in any one or more of the first plate discharging section, the second plate discharging section, the third plate discharging section, and the fourth plate discharging section, and the conveying speed of the plates may be adjusted.

In an exemplary embodiment of the present application, the adjusting the conveying speed of any one or more of all the outlet segments of the outlet area according to the third detection result may include:

and when the plurality of plate discharging sections have no plates, controlling the Nth plate discharging section to stop running and reducing the conveying speed of the plurality of plate discharging sections.

In the exemplary embodiment of the present application, if it is detected that all of the first board discharging section, the second board discharging section, the third board discharging section, and the fourth board discharging section have boards, it may be predicted that the probability that boards will be stacked is relatively high at this time, and once the subsequent device fails, the probability that the dryer is stopped is relatively high, so that no matter the speed of the first board discharging section, the second board discharging section, the third board discharging section, and the fourth board discharging section is high at this time, in this case, the plurality of board discharging sections may be controlled to stop running for a certain time, and at least, all of the board discharging sections may be restarted after boards on the fourth board discharging section are carried away by the subsequent device, or only the third board discharging section may be started.

In the exemplary embodiment of the present application, if it is detected that none of the first board discharging section, the second board discharging section, the third board discharging section, and the fourth board discharging section has boards, at this time, a problem may occur in the board entering area 1 and/or the drying area 2, and therefore, no matter the speed of the first board discharging section, the second board discharging section, the third board discharging section, and the fourth board discharging section, the fourth board discharging section may be controlled to stop running to reduce power consumption, and other running sections may reduce speed to prepare to convey boards sent out from the drying area 2 at any time. The first plate discharging section, the second plate discharging section, the third plate discharging section and the fourth plate discharging section can also be stopped from running and restarted after the plates are sent out from the drying area 2, so that on one hand, the power consumption can be reduced, and on the other hand, more plate conveying time can be provided when the follow-up equipment breaks down, so that more time can be provided for the follow-up equipment maintenance.

In an exemplary embodiment of the present application, when at least one of the plurality of outlet segments has a plate, the adjusting the conveying speed of any one or more of all outlet segments of the outlet area according to the third detection result may include:

if the N plate discharging section has no plate and the first conveying speed is greater than or equal to the conveying speed of the other plate discharging sections, reducing the first conveying speed and increasing the conveying speed of the other plate discharging sections;

if the Nth plate discharging section has no plate and the first conveying speed is lower than the conveying speeds of the other plate discharging sections, controlling the Nth plate discharging section to stop running and increasing the conveying speeds of the other plate discharging sections;

if the Nth plate discharging section has plates, the other plate discharging sections have no plates, and the first conveying speed is greater than or equal to the conveying speed of the other plate discharging sections, controlling the Nth plate discharging section to stop running, and keeping or reducing the conveying speed of the other plate discharging sections;

if the Nth plate discharging section has plates, the other plate discharging sections have no plates, and the first conveying speed is lower than the conveying speeds of the other plate discharging sections, controlling the Nth plate discharging section to stop running, and keeping or reducing the conveying speeds of the other plate discharging sections;

if the Nth plate discharging section has plates, one or more plate discharging sections which are continuously adjacent to the Nth plate discharging section on other plate discharging sections have plates, and the first conveying speed is greater than or equal to the conveying speed of the other plate discharging sections, controlling the Nth plate discharging section to stop running, controlling one or more plate discharging sections which are continuously adjacent to the Nth plate discharging section to stop running, and reducing the conveying speed of the plate discharging sections without plates on the other plate discharging sections or controlling the plate discharging sections without plates on the other plate discharging sections to stop running;

if the Nth plate discharging section has plates, one or more plate discharging sections which are continuously adjacent to the Nth plate discharging section on other plate discharging sections have plates, and the first conveying speed is lower than the conveying speed of the other plate discharging sections, controlling the Nth plate discharging section to stop running, controlling one or more plate discharging sections which are continuously adjacent to the Nth plate discharging section to stop running or reducing the conveying speed of one or more plate discharging sections which are continuously adjacent to the Nth plate discharging section, and reducing the conveying speed of the plate discharging sections without plates on the other plate discharging sections or controlling the plate discharging sections without plates on the other plate discharging sections to stop running;

if the Nth plate discharging section has plates, one or more plate discharging sections without plates are included between the plate discharging section with the plate closest to the Nth plate discharging section in the other plate discharging sections and the Nth plate discharging section, and the first conveying speed is greater than or equal to the conveying speed of the other plate discharging sections, reducing the first conveying speed or controlling the Nth plate discharging section to stop running, and increasing the conveying speed of the other plate discharging sections;

if the Nth plate discharging section has plates, one or more plate discharging sections which have plates and are closest to the Nth plate discharging section in other plate discharging sections are included between the N plate discharging section and the plate discharging section, the first conveying speed is lower than the conveying speed of the other plate discharging sections, the first conveying speed is reduced or the Nth plate discharging section is controlled to stop running, and the conveying speed of the other plate discharging sections is increased.

In an exemplary embodiment of the application, when the fourth outgoing board section has no board, if the first conveying speed is greater than or equal to the conveying speeds of the other outgoing board sections, the first conveying speed may be reduced, the other outgoing board sections are waited to convey the board (if the first conveying speed is less than the conveying speeds of the other outgoing board sections, the fourth outgoing board section may be controlled to directly stop operating), and the conveying speeds of the other outgoing board sections are increased, so as to improve the conveying efficiency as soon as possible.

In an exemplary embodiment of the present application, if the fourth outgoing board section has a board, and no board is on the other outgoing board sections, whether the first conveying speed is greater than or equal to the conveying speed of the other outgoing board sections or the first conveying speed is less than the conveying speed of the other outgoing board sections, the fourth outgoing board section may be controlled to stop running, and the conveying speed of the other outgoing board sections may be maintained or reduced. When other board sections all do not have the board, can control fourth board section shut down, reduce other board section transport speed, also can control other board sections shut down to wait for the panel that drying zone 2 sent out, fourth board section can not cause any pressure to follow-up equipment this moment, even follow-up equipment breaks down in addition can not cause the influence to follow-up equipment yet, thereby can not make the desiccator shut down. And controlling the fourth board discharging section to stop running, reducing the conveying speed of other board discharging sections, and even controlling other board discharging sections to stop running can reduce power consumption.

In an exemplary embodiment of the application, if the fourth board outlet section has a board, and one or more board outlet sections continuously adjacent to the fourth board outlet section on the other board outlet sections have a board (that is, the third board outlet section has a board, or the second board outlet section and the third board outlet section have a board, or the first board outlet section, the second board outlet section and the third board outlet section have a board), when the first conveying speed is greater than or equal to the conveying speed of the other board outlet sections, the fourth board outlet section may be controlled to stop operating, and the third board outlet section has a board, or the second board outlet section and the third board outlet section, or the first board outlet section, the second board outlet section and the third board outlet section stop operating, and the conveying speed of the board outlet section without a board on the other board outlet section is reduced, or the board outlet section without a board on the other board outlet section stops operating; in this embodiment, if the first conveying speed is greater than or equal to the conveying speeds of the other plate discharging sections, and plates are still arranged on the continuous several plate discharging sections of the fourth plate discharging section, it indicates that the conveying speeds of the other plate discharging sections are too fast, the plate discharging sections with the plates are controlled to stop running, the pressure of the fourth plate discharging section can be reduced, plate stacking is avoided, and the dryer has to be stopped when subsequent equipment fails.

In an exemplary embodiment of the present application, if the fourth board outlet section has boards, and one or more board outlet sections, which are continuously adjacent to the fourth board outlet section, on the other board outlet sections have boards, and the first conveying speed is lower than the conveying speed of the other board outlet sections, the fourth board outlet section is controlled to stop operating, and the one or more board outlet sections, which are continuously adjacent to the fourth board outlet section, are controlled to stop operating or the conveying speed of the one or more board outlet sections, which are continuously adjacent to the fourth board outlet section, is reduced, and the conveying speed of the board outlet section without boards on the other board outlet sections is reduced or the board outlet section without boards on the other board outlet sections is controlled to stop operating; in this embodiment, if the first conveying speed is lower than the conveying speeds of the other plate discharging sections, and the plates are still provided on the consecutive plate discharging sections of the fourth plate discharging section, the plate discharging speed of the fourth plate discharging section may be lower, at this time, to avoid plate stacking, the operation of all the plate discharging sections with plates may be stopped, and the conveying speeds of the other plate discharging sections may also be reduced to reduce the pressure of the fourth plate discharging section, so as to avoid plate stacking.

In an exemplary embodiment of the present application, if the fourth outgoing lane has a board, and one or more non-board outgoing lanes are included between the board outgoing lane closest to the fourth outgoing lane among the other outgoing lanes and the fourth outgoing lane, whether the first conveying speed is greater than or equal to the conveying speed of the other outgoing lane or the first conveying speed is less than the conveying speed of the other outgoing lane, the first conveying speed may be decreased or the fourth outgoing lane may be controlled to stop operating, and the conveying speed of the other outgoing lane may be increased. Through reducing first conveying speed or control fourth play board section out-of-service can wait for panel to transport on the one hand and come, reduce the consumption, on the other hand can reduce the fourth and go out the board section and cause pressure to follow-up equipment, improves other transport speed that go out the board section and can improve and transport efficiency.

Fault early warning technology

Early warning of board entering

An exemplary embodiment of the present invention provides a gypsum board dryer board feeding abnormality warning device, including: the device comprises a plurality of groups of position sensors, a controller, an alarm and a display screen; each group of position sensors is respectively arranged above one layer of roller way, the sensing end of each position sensor faces the layer of roller way, and the distance between the sensing end of each position sensor and the top surface of the roller way is larger than the thickness of the single-layer gypsum board; the input end of the controller is connected with the output end of the position sensor, the output end of the controller is connected with the alarm and the display screen, and the alarm is controlled to give an alarm after the signal of the position sensor is received, and the alarm information is displayed on the display screen. If the gypsum board attachment strap on a certain layer of desiccator roller way, then establish the position sensor of this layer of track top and can send a signal for the controller, the controller receives this signal after control alarm ware is reported to the police, shows alarm information on the display screen simultaneously, operating personnel sees behind the alarm information in time to the corresponding number of piles condition of looking over and do corresponding processing, has avoided the adverse effect that the attachment strap brought, and the reliability is higher.

Closed section laminated plate early warning

An exemplary embodiment of the present invention discloses an inner butt strap alarm device of a dryer, comprising: the fulcrum of the lever unit is arranged on the roller way support of the single-layer dryer, and a blocking piece is arranged at one end inside the sealing door of the dryer; the distance between the bottom of the separation blade and the roller path surface of the dryer is larger than the thickness of a single-layer gypsum board and smaller than the thickness of two layers of gypsum boards; an induction sheet is arranged at one end outside the sealing door of the drying machine; the induction switch is arranged outside the dryer, the induction end faces the induction sheet, and the signal end is connected with the controller; the controller is used for sending out a sensing signal to the controller when the sensing piece acts; the controller is used for controlling the alarm to give an alarm after receiving the induction signal from the induction switch; the alarm is connected with the controller. The inner-board-lapping alarm device of the dryer provided by the embodiment of the invention senses whether a gypsum board inside the dryer is lapped or not through the lever unit, when the lapping occurs, one end, positioned inside the dryer, of the lever unit is lifted up by the gypsum board, the sensing piece at the outer end of the lever moves downwards, a signal is sent to the controller through the sensing switch, the controller starts the alarm device to alarm, and an operator can know the number of layers of an alarm area and a roller way through the display screen connected with the controller, so that the alarm area and the roller way can be processed in time, the blockage caused by the lapping is avoided, and the operation efficiency of the dryer is greatly improved.

An exemplary embodiment of the present invention provides a dryer broken panel display system including: the detection unit is arranged on the gypsum board drying channel and is used for detecting gypsum board position information and sending the information to the control unit; the control unit receives the information sent by the detection unit, performs calculation analysis and judgment, and sends a judgment result to a display unit; and the display unit receives the judgment result sent by the control unit and displays the judgment result. The gypsum board position sensing device adopts the detection unit, the control unit and the display unit, the detection unit can sense the position of the gypsum board, the control unit comprehensively calculates, analyzes and judges the state of the whole position of the gypsum board according to the sensing result in combination with the preset gypsum board length and the gypsum board transmission speed, and the state is displayed by the display unit, so that an operator can read the state conveniently to take corresponding measures.

Early warning of plate discharge section

An exemplary embodiment of the present invention provides a dryer outlet sheet aligning device, including: the at least two photoelectric switches are respectively used for detecting the plate-out conditions at the two sides of the dryer and sending signals to the controller when sensing that plates appear at the detected side; the controller is connected with the photoelectric switch, the plate feeding motor and the stop driving part; and receiving signals sent by the photoelectric switches on the two sides, controlling the plate conveying motor to stop after running for a specified time, and starting the stop driving part to place the plate.

In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "mouth" structure ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the structures referred to have specific orientations, are configured and operated in specific orientations, and thus, are not to be construed as limiting the present invention.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," and "assembled" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening media, or may be connected through 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.

Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a gypsum board drying system, includes circulated air system to and advance board district, a plurality of drying zones and go out the board district that set gradually, and, wherein:

the board outlet area is used for conveying the dried gypsum board to the position of the next working procedure;

gypsum board drying system includes 3 drying zones, sets up to preheating the first drying zone of drying section with higher speed promptly, sets up to the second drying zone of constant speed drying section and sets up to the third drying zone of deceleration drying section, and wherein third drying zone length is longer, first drying zone and second drying zone all are provided with exhaust duct, the third drying zone is provided with heated air circulation pipeline, exhaust duct and heated air circulation pipeline intercommunication, the last exhaust fan that is provided with of exhaust duct, exhaust fan set up to with the waste gas of first drying zone and second drying zone is supplied with in the heated air circulation pipeline.

2. A gypsum board drying system as defined in claim 1, wherein:

the first drying area is divided into a plurality of small transverse areas, at least one heat circulating fan is arranged in each small transverse area, and the gypsum board is dried by adopting a transverse air partition.

3. A gypsum board drying system as defined in claim 1, wherein:

the waste gas pipeline of the first drying area is set as a first waste gas pipeline, the waste gas pipeline of the second drying area is set as a second waste gas pipeline, the first waste gas pipeline and the second waste gas pipeline are communicated with the hot air circulation pipeline of the third drying area through a waste gas connecting pipeline, and the waste gas fan is arranged on the waste gas connecting pipeline;

the exhaust gas pipeline of third dry zone sets up to third exhaust gas pipeline, the exhaust gas connecting line include the trunk line and with two auxiliary pipelines of trunk line intercommunication, first exhaust gas pipeline and second exhaust gas pipeline with the trunk line intercommunication, one in two auxiliary pipelines with the heated air circulation pipeline intercommunication in third dry zone, another in two auxiliary pipelines with third exhaust gas pipeline intercommunication.

4. A gypsum board drying system as set forth in claim 3, wherein:

gypsum board drying system still including set up in on the third waste gas pipeline disappear white transducer and with the hydrofuge chimney and the white fan that disappears of third waste gas pipeline tip intercommunication, the entry of the white transducer that disappears pass through the pipeline with the white fan intercommunication that disappears, the export of the white transducer that disappears pass through the pipeline with the hydrofuge chimney intercommunication.

5. A gypsum board drying system as defined in claim 1, wherein:

the gypsum board drying system further comprises a board edge drying device for drying edges of gypsum board, the board edge drying device comprising:

the air conditioner comprises a main air duct which is vertically arranged, wherein a plurality of sub air ducts are arranged on the side wall of the main air duct at intervals along the axial direction; and

and the air pumping device is connected with the air inlet of the main air duct and used for pumping air with a set temperature into the main air duct, wherein the set temperature is not higher than the critical temperature for plate edge overheating and embrittlement.

6. The gypsum board drying system of claim 5, wherein:

the air pumping device is a dryer, and the air pumped by the dryer is hot air heated to the set temperature by the dryer; or

The air pump is an air pump, and the air pumped by the air pump is hot air which cools the surface of the gypsum board to a set temperature after drying.

7. A gypsum board drying system as defined in claim 1, wherein:

the circulating air system comprises an air outlet duct for drying the surface of the gypsum board, the air outlet duct comprises an air duct body, a main channel is arranged in the air duct body, an auxiliary channel is arranged on at least one of the top wall and the bottom wall of the air duct body, the main channel is communicated with the auxiliary channel, and the axis of the auxiliary channel is inclined relative to the axis of the main channel.

8. The gypsum board drying system of claim 7, wherein:

the axis of the auxiliary channel inclines towards the air outlet side of the main channel from the inside of the main channel to the outside of the main channel, and the inclination angle of the axis of the auxiliary channel relative to the axis of the main channel is 5-35 degrees.

9. The gypsum board drying system of claim 7, wherein:

the drying area is provided with a dryer, the dryer is arranged beside the air outlet duct, and an air outlet of the dryer is connected with an air inlet of the main channel.

10. A method of drying gypsum board comprising:

feeding gypsum board to be dried from a board feeding zone to a first drying zone of a plurality of drying zones;

sequentially drying the gypsum boards to be dried in the plurality of drying zones, and conveying the dried gypsum boards to a board discharging zone, wherein the gypsum boards are dried by adopting transverse air zones in the first drying zone of the plurality of drying zones, and the gypsum boards are dried by adopting longitudinal air in the other drying zones;

conveying the dried gypsum board to the position of the next process through the board outlet area;

wherein the plurality of drying zones includes 3 drying zones, namely a first drying zone configured as a preheating acceleration drying section, a second drying zone configured as a constant speed drying section, and a third drying zone configured as a deceleration drying section, wherein the length of the third drying zone is longer; first drying area and second drying area all are provided with the exhaust duct, the third drying area is provided with heated air circulation pipeline, and first exhaust duct and second exhaust duct pass through the waste gas connecting tube and are connected with third circulating line, and the waste gas in first exhaust duct and the second exhaust duct mixes the back and directly passes through third heated air circulation pipeline for the heat supply of third drying chamber.

11. A method of drying gypsum board as defined in claim 10, wherein:

the first drying area is divided into a plurality of small transverse areas, at least one thermal circulation fan is arranged in each small transverse area, and transverse wind subareas are sequentially adopted to dry the gypsum board.

12. A method of drying gypsum board as defined in claim 10, wherein:

the drying treatment is carried out to the gypsum board that waits to dry in proper order in a plurality of drying zones, includes: the method comprises the steps of blowing hot air with a set temperature to plate edges of a gypsum board through a plate edge drying device so as to dry the plate edges of the gypsum board, wherein the set temperature is not higher than the critical temperature of plate edges becoming crisp due to overheating, the hot air is the hot air which cools the surface of the gypsum board to 70-100 degrees after being dried, and the set temperature is 70-100 degrees.

13. A method of drying gypsum board as defined in claim 10, wherein:

the plate discharging area comprises a plurality of plate discharging sections which are sequentially connected, wherein the plate discharging sections at least comprise a first plate discharging section connected with the closed drying area and an Nth plate discharging section which is far away from the closed drying area and is positioned at the tail end of the plate discharging area, N is a positive integer greater than or equal to 2, and the method comprises the following steps:

detecting whether a plate exists in the Nth plate outlet section or not and a first conveying speed of the Nth plate outlet section in real time in the transportation process of the plates continuously output from the closed drying area in the plate outlet area;

and adjusting the first conveying speed and/or the conveying speeds of other plate discharging sections except the Nth plate discharging section in the plate discharging area according to a first detection result.

14. A method of drying gypsum board as defined in claim 13, wherein:

the first detection result includes: the Nth plate outlet section is provided with no plate or the Nth plate outlet section is provided with a plate;

the method further comprises the following steps: detecting whether the other plate-out sections have plates or not after detecting that the Nth plate-out section has no plates or the Nth plate-out section has plates; and adjusting the first conveying speed and/or the conveying speed of the other plate discharging sections according to a second detection result.