Film slag drying device and film slag treatment equipment

Abstract

The utility model discloses a film residue drying device and film residue treatment equipment, which comprise a shell, a space for containing and drying film residues is arranged in the shell, a cover body and a heating mechanism are arranged in the space, the cover body is used for covering the film residues when the film residues are dried, and a through hole penetrating through the wall thickness of the cover body is formed in the cover body. According to the film residue drying device, the dehydration rate of the film residues is further improved by heating the film residues, and meanwhile, the film residues are covered in the cover body during drying, so that adverse effects caused by splitting of the film residues in the drying process, dust splashing and flying and adhesion to the inner wall of the drying device or a heating part are prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of the preparation of solar cell wafers and waste treatment, and particularly relates to a drying device suitable for the membrane residues generated in the preparation process of solar cell wafers and a membrane residue treatment device including the drying device for membrane residues. Background Art

[0002] When preparing the grid lines of battery wafers by the traditional wet method, generally the following several technological steps are required: coating, exposure, development, electroplating grid lines, stripping the film, and back etching. Among them, the development process refers to using a developer to dissolve the unnecessary parts on the coated mask layer after exposure in the developer, and retaining the required parts; the film stripping process is to put all the mask layers not removed in the development into a film stripping solution to remove, and finally only retain the required grid lines after electroplating. Therefore, if the solution containing membrane residues is directly discarded, it will cause great waste and environmental pollution.

[0003] The mask layer is scattered in the solution after film stripping to form membrane residues, which need to be uniformly collected to recycle the solution. The weight of the membrane residues after being extruded by an extruder is about 2 g per piece, and about 20 Kg for every 10,000 pieces; the method for treating membrane residues is to put the membrane residues into bags and then manually transport them to a fixed position, with about 20 Kg transported at a time; the treatment cost per kilogram of membrane residues is about 10 yuan, and the large amount of membrane residues leads to too high treatment cost.

[0004] There are the following three reasons for the difficult treatment of membrane residues: 1. Mechanical problems: The existing membrane residue squeezing machine cannot effectively squeeze dry the membrane residues; 2. Mask formula: Different masks have different reactions after film stripping. The softer and finer the membrane residues are, the lower the dehydration rate is; 3. Machine differences: With the same mask, the membrane residues from different machines have different reactions. For example, the dehydration rate of the membrane residues of VCP (vertical continuous electroplating) and tank electroplating is lower than that of horizontal electroplating, and the dehydration rate is more than one-third lower.

[0005] Therefore, the dehydration rate of the membrane residues in the prior art is relatively low. Content of the Utility Model

[0006] In view of this, in order to solve the problems of the prior art, the utility model provides a drying device for membrane residues, which can dry and further dehydrate the membrane residues after preliminary extrusion and dehydration of the membrane residues.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A drying device for membrane residues includes a housing. A space for accommodating the membrane residues and drying them is provided inside the housing. A cover body and a heating mechanism are arranged in the space. The cover body is used to cover the membrane residues during the drying of the membrane residues, and through holes penetrating the wall thickness of the cover body are provided on the cover body.

[0009] According to some preferred embodiments of the present utility model, a feed inlet and a discharge outlet are provided on the side wall of the housing. The membrane residue enters the space through the feed inlet and leaves the space through the discharge outlet after drying. When the membrane residue is dried, it enters the space through the feed inlet and is located at a fixed place in the drying space, covered by the cover body and dried, and then leaves the cover body and leaves through the discharge outlet after drying.

[0010] According to some preferred embodiments of the present utility model, a lifting mechanism is provided on the inner wall of the housing. The lifting mechanism is used to control the position of the cover body, so that the cover body covers the membrane residue when the membrane residue is dried, and disengages from the membrane residue when the membrane residue leaves the space after drying. The cover body only needs to cover the membrane residue when it is dried, preventing the membrane residue from splitting during the drying process, causing dust to fly and float, and adhering to the inner wall or heating components of the drying device, resulting in adverse effects such as a decrease in the lifespan of related components and problems with component cleaning.

[0011] Preferably, the lifting mechanism can be selected as a cylinder or a hydraulic cylinder drive. For example, a cylinder or a hydraulic cylinder is provided at the top of the housing, and its piston rod penetrates downward through the top of the housing and extends into the drying space. The cover body is fixed at the end of the piston rod, and the up and down movement of the cover body is driven by the drive of the cylinder or the hydraulic cylinder. In some other embodiments, the cover body can also be threadedly connected to the lead screw, and the motor drives the lead screw to rotate to drive the up and down movement of the cover body.

[0012] According to some preferred embodiments of the present utility model, a blowing mechanism is provided between the heating mechanism and the inner wall of the housing, and the air outlet direction of the blowing mechanism faces the position of the membrane residue when the membrane residue is dried.

[0013] Preferably, the blowing mechanism is a fan, which is rotatably connected to the inner wall of the housing, so that the air outlet angle of the fan is adjustable. When the membrane residue is heated and dried in the drying space, the air outlet directions of all the fans face the membrane residue to better heat the membrane residue. At the same time, the circulation of the air flow in the drying space is accelerated, so that the temperature in the space is kept as consistent as possible.

[0014] According to some preferred embodiments of the present utility model, it includes a material receiving tank, which is used to receive the membrane residue and enter the space for drying the membrane residue, and the size of the cover body is larger than the size of the material receiving tank. The membrane residue is accommodated in the material receiving tank and is driven to move by the material receiving tank.

[0015] According to some preferred embodiments of the present utility model, it includes a frame and a conveyor belt. The housing is fixedly arranged on the frame and straddles both sides in the width direction of the conveyor belt, and the material receiving tank moves along with the conveyor belt. That is, the position of the drying device on the frame is fixed, and the conveyor belt moves, driving the material receiving tank and the membrane residue therein to move.

[0016] According to some preferred embodiments of the present utility model, a temperature sensor is disposed inside the housing, and the temperature sensor is in signal connection with the heating mechanism. The temperature sensor is used to monitor the temperature inside the drying space, and is in signal connection with the heating mechanism to control the operation of the heating mechanism and thus control the temperature inside the drying space.

[0017] According to some preferred embodiments of the present utility model, a ventilation hole penetrating through the thickness is provided at the top of the housing, and the opening degree of the ventilation hole can be adjusted. For example, when the temperature inside the drying space is too high, the opening degree of the ventilation hole is increased to enhance the air circulation inside and outside, reduce the temperature inside the drying space, and keep the temperature inside the drying space within a certain range.

[0018] The present utility model also provides a membrane residue treatment device, including the membrane residue drying device as described above.

[0019] According to some preferred embodiments of the present utility model, it includes an extrusion device for extruding the membrane residue. The membrane residue after being extruded by the extrusion device enters the membrane residue drying device for drying to further improve the dehydration rate of the membrane residue.

[0020] Compared with the prior art, the advantages of the present utility model are as follows: In the membrane residue drying device of the present utility model, by heating the membrane residue, the dehydration rate of the membrane residue is further improved. At the same time, during drying, the membrane residue is covered inside the cover body to prevent the membrane residue from splitting, dust flying and floating during drying, and adhering to the inner wall of the drying device or the heating component, which affects the subsequent drying of the membrane residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of the membrane residue treatment device in the preferred embodiment of the present utility model;

[0023] Figure 2 It is a schematic structural diagram of the membrane residue drying device in the preferred embodiment of the present utility model;

[0024] Figure 3 It is a schematic structural diagram of one side of the housing with a heating mechanism in the preferred embodiment of the present utility model;

[0025] Wherein: extrusion device - 1, membrane residue drying device - 2, extruder - 31, feeding port - 32, discharge belt - 33, housing - 41, cover - 42, heating mechanism - 43, lifting mechanism - 44, feed inlet - 45, discharge outlet - 46, temperature sensor - 47, blowing mechanism - 48, ventilation holes - 49, material receiving trough - 5, frame - 6, conveyor belt - 7, membrane residue - 8, space - 9. Detailed implementation manners

[0026] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0027] As Figures 1-3 shown, the membrane residue treatment equipment of this embodiment includes a frame 6, a conveyor belt 7 arranged on the frame 6, an extrusion device 1 and a membrane residue drying device 2. The extrusion device 1 and the membrane residue drying device 2 are fixedly arranged on the frame 6. The extrusion device 1 is used to extrude the membrane residue 8 to achieve preliminary dehydration. The membrane residue 8 after being extruded by the extrusion device 1 enters the membrane residue drying device 2 through the conveying of the conveyor belt 7 for drying, so as to further improve the dehydration rate of the membrane residue 8. The form of the membrane residue 8 after being extruded by the extrusion device 1 can be any one of a solid state or a solid-liquid mixed state. In this embodiment, the membrane residue 8 after extrusion is a solid block-shaped membrane residue mixed with a small amount of liquid.

[0028] The membrane residue treatment equipment of this embodiment preferably includes a material receiving trough 5. The material receiving trough 5 is used to receive the membrane residue 8 after being extruded by the extrusion device 1 and enter the membrane residue drying device 2 for drying the membrane residue 8. The membrane residue 8 is accommodated in the material receiving trough 5 and is driven by the material receiving trough 5 to move, which facilitates the movement of the membrane residue 8 and avoids the dropping of the membrane residue 8.

[0029] In one example, the material receiving trough 5 is a deep trough body structure with an upward opening to receive a relatively large number of membrane residues 8 after being extruded by the extrusion device 1. In this embodiment, the membrane residue 8 after extrusion is a solid block-shaped membrane residue. Preferably, the material receiving trough 5 is a shallow trough body structure with an upward opening. The solid block-shaped membrane residues can be stacked in the material receiving trough 5, and the height of the membrane residue 8 is higher than the height of the trough wall of the material receiving trough 5, which is also convenient for the subsequent drying of the membrane residue 8 and increases the drying area of the membrane residue 8.

[0030] The extrusion device 1 includes an extruder 31 which has a feeding port 32 at its top. The film residue 8 generated on the production line enters the extruder 31 through the feeding port 32. After being extruded by the extruder 31, preliminary dehydration is achieved. The film residue 8 formed after extrusion is driven by the discharge belt 33 of the extruder 31 to be conveyed outwards and falls into the receiving trough 5 at the end of the corresponding discharge belt 33. The conveyor belt 7 drives the receiving trough 5 and the film residue 8 therein into the film residue drying device 2 for drying.

[0031] In this embodiment, the film residue drying device 2 includes a housing 41. Inside the housing 41, there is a space 9 for accommodating the film residue 8 and drying it. In the space 9, there are provided a cover body 42, a lifting mechanism 44, a heating mechanism 43, and a temperature sensor 47. The housing 41 is fixedly arranged on the frame 6 and straddles both sides in the width direction of the conveyor belt 7. The receiving trough 5 moves along with the conveyor belt 7, driving the film residue 8 to move into or out of the film residue drying device 2. That is, the position of the drying device on the frame 6 is fixed, and the conveyor belt 7 moves, driving the receiving trough 5 and the film residue 8 therein to move.

[0032] The temperature sensor 47 is signal-connected to the heating mechanism 43. The temperature sensor 47 is used to monitor the temperature in the drying space 9 and is electrically signal-connected to the heating mechanism 43 to control the operation of the heating mechanism 43 and thus control the temperature in the drying space 9. The cover body 42 is used to cover the film residue 8 during the drying of the film residue 8. The cover body 42 is provided with through holes penetrating its wall thickness. The size of the cover body 42 is larger than that of the receiving trough 5. The cover body 42 is used to prevent the film residue 8 from splitting during the drying process, causing the flying and floating of dust, adhering to the inner wall of the drying device or the heating components, resulting in adverse effects such as the reduction of the service life of relevant components and the cleaning problem of the components, thus affecting the subsequent drying effect of the film residue 8. The lifting mechanism 44 is used to control the position of the cover body 42 so that the cover body 42 covers the film residue 8 during the drying of the film residue 8 and disengages from the film residue 8 when the film residue 8 leaves the space 9 after drying.

[0033] In this embodiment, on the side wall of the housing 41, there are provided a feeding port 45 and a discharging port 46. The film residue 8 enters the space 9 through the feeding port 45 and leaves the space 9 through the discharging port 46 after drying.

[0034] In an example, on the opposite side walls of the housing 41, there are provided a feeding port 45 and a discharging port 46. On the top of the housing 41, there is provided a through hole 49 penetrating its thickness, and the opening degree of the through hole 49 can be adjusted. During the drying of the film residue 8, the film residue 8 enters the space 9 through the feeding port 45 and is located at a fixed place in the drying space 9. It is covered by the cover body 42 and dried, and after drying, it disengages from the cover body 42 and leaves the space 9 through the discharging port 46. Preferably, on the feeding port 45 and the discharging port 46, there are provided doors that can be opened and closed to keep the drying space 9 airtight.

[0035] In another example, the feed inlet 45 is provided at the top of the housing 41. After the membrane residue 8 is extruded by the extruder 31, it directly falls from the discharge belt 33 of the extruder 31 through the feed inlet at the top of the housing 41 into the material receiving trough 5 inside the housing 41, and is directly dried to save the space 9 of the entire membrane residue treatment equipment. The ventilation holes 49 are opened on other side walls of the housing 41. In other examples, the feed inlet 45 and the discharge outlet 46 can be opened on a certain side wall of the housing 41 at the same time, or combined into one inlet and outlet. The heating mechanism 43 can be selected as a heating lamp tube or a heating wire. Through the cooperation of the temperature sensor 47 and the ventilation holes 49, the temperature in the drying space 9 is prevented from being too high or too low, so that it is within a suitable temperature range for drying the membrane residue 8. The ventilation holes 49 can be externally connected to a gas filtering or treatment mechanism to prevent the escape of harmful gases.

[0036] Preferably, the lifting mechanism 44 can be selected to be driven by a cylinder or a hydraulic cylinder. For example, a cylinder or a hydraulic cylinder is provided at the top of the housing 41, and its piston rod penetrates downward through the top of the housing 41 and extends into the drying space 9. The cover body 42 is fixed to the end of the piston rod. Through the drive of the cylinder or the hydraulic cylinder, the up and down movement of the cover body 42 is driven. In other embodiments, the cover body 42 can also be provided to be threadedly connected to the lead screw, and the motor is used to drive the lead screw to rotate to drive the up and down movement of the cover body 42.

[0037] Preferably, a blowing mechanism 48 is provided between the heating mechanism 43 and the inner wall of the housing 41. The blowing direction of the blowing mechanism 48 is towards the position of the membrane residue 8 when the membrane residue 8 is dried, so as to blow the heat source generated by the heating mechanism 43 towards the membrane residue flakes (blocks). Preferably, the blowing mechanism 48 is a fan, which is rotatably connected to the inner wall of the housing 41, so that the blowing angle of the fan is adjustable. When the membrane residue 8 is heated and dried in the drying space 9, the blowing directions of all the fans are facing the membrane residue 8 to better heat the membrane residue 8. At the same time, the circulation of the air flow in the drying space 9 is accelerated, so that the temperature in the space 9 is kept as consistent as possible. Preferably, the heating mechanism 43 and the blowing mechanism 48 are provided on two opposite side walls except for the feed inlet 45 and the discharge outlet 46.

[0038] The working process of the membrane residue treatment equipment in this embodiment is briefly described as follows:

[0039] The membrane residue 8 generated on the production line enters the extrusion device 1 through the feed inlet 32. After being extruded by the extrusion device 1, the membrane residue 8 is separated from the residual potion to achieve preliminary dehydration. The membrane residue (blocks) formed after extrusion is driven by the discharge belt 33 of the extrusion device 1 and conveyed outward, and falls into the material receiving trough 5 at the end of the corresponding discharge belt 33.

[0040] The conveyor belt 7 rotates, driving the material receiving trough 5 thereon and the film residue 8 in the material receiving trough 5 to move forward. The film residue 8 enters the drying space 9 through the feed inlet 45 of the housing 41 of the film residue drying device 2. Preferably, when the film residue 8 is located at the middle position at the bottom of the drying space 9, the lifting mechanism 44 is activated to drive the cover body 42 to move downward and cover the material receiving trough 5 and the film residue 8 therein.

[0041] When the cover body 42 completely covers the material receiving trough 5 and the film residue 8 therein, or while the cover body 42 is moving downward, the heating mechanism 43 is activated to start heating up. The temperature sensor 47 in the drying space 9 monitors the temperature. When the temperature in the drying space 9 is lower than the set temperature, the heating mechanism 43 is controlled to continue working. When the temperature sensor 47 monitors that the temperature in the drying space 9 reaches or is higher than the set temperature, the heating mechanism 43 is controlled to stop working, or part of the heating mechanism 43 stops working to maintain the temperature. After that, the temperature sensor 47 monitors the temperature and controls the operation of the heating mechanism 43. When the film residue drying device 2 is used for the first time or for the first time after shutdown, the temperature is raised according to the above steps. During the continuous drying process, only the temperature in the drying space 9 needs to be monitored and the heating mechanism 43 needs to be controlled to work.

[0042] During the heating process, the blowing mechanism 48 works continuously, blowing the hot air towards the position of the film residue 8 to better dry the film residue 8.

[0043] When the drying reaches the set time, the lifting mechanism 44 is activated to drive the cover body 42 to move upward away from the material receiving trough 5 and the film residue 8 therein. After that, the conveyor belt 7 is started again, driving the material receiving trough 5 thereon and the film residue 8 in the material receiving trough 5 to move forward, and leaving the drying space 9 through the discharge outlet 46 of the housing 41 of the film residue drying device 2, and the drying process ends. The dried film residue 8 is collected.

[0044] For the film residue drying device 2 of the present utility model, by extruding the film residue 8 and then drying it, the dehydration rate is significantly improved, reducing the subsequent treatment difficulty and cost; at the same time, when drying, the film residue 8 is covered in the cover body 42 to prevent the film residue 8 from splitting, dust flying and floating during the drying process, and adhering to the inner wall of the drying device or the heating components, affecting the subsequent drying of the film residue; while improving the dehydration rate, the goal of energy conservation and emission reduction is achieved, reducing energy consumption and environmental pollution.

[0045] The above embodiments are only for illustrating the technical concept and features of the present utility model, and their purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly. It should not be used to limit the protection scope of the present utility model. Any equivalent changes or modifications made according to the spirit of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A film residue drying device, characterized in that: It comprises a shell, wherein the shell has a space for accommodating and drying film residues, wherein a cover body and a heating mechanism are arranged in the space, wherein the cover body is used for covering the film residues when the film residues are dried, and wherein a through hole penetrating the wall thickness of the cover body is opened.

2. The film residue drying device according to claim 1, characterized in that: A feed inlet and a discharge outlet are provided on the side wall of the shell. The film residue enters the space through the feed inlet and leaves the space through the discharge outlet after drying.

3. The film residue drying device according to claim 1, characterized in that: A lifting mechanism is arranged on the inner wall of the shell, and the lifting mechanism is used to control the position of the cover body so that the cover body covers the film residue when the film residue is dried, and is separated from the film residue when the film residue leaves the space.

4. The film residue drying device according to claim 1, characterized in that: A blower mechanism is provided between the heating mechanism and the inner wall of the shell, and the air outlet direction of the blower mechanism is toward the position of the film residue when the film residue is dried.

5. The film residue drying device according to claim 1, characterized in that: It comprises a material receiving trough, which is used to receive the film residue and enter the space to dry the film residue. The size of the cover body is larger than that of the material receiving trough.

6. The film residue drying device according to claim 5, characterized in that: It comprises a frame and a conveyor belt, wherein the shell is fixedly arranged on the frame and straddles both sides of the conveyor belt in the width direction, and the material receiving trough moves along with the conveyor belt.

7. The film residue drying device according to claim 1, characterized in that: A temperature sensor is arranged in the shell, and the temperature sensor is connected to the heating mechanism by signal.

8. The film residue drying device according to claim 1, characterized in that: The top of the shell is provided with a vent hole penetrating through the thickness of the shell.

9. A film slag processing device, characterized in that: The film residue processing equipment includes the film residue drying device as described in any one of claims 1-8.

10. The film slag processing equipment according to claim 9, characterized in that: It comprises an extrusion device for extruding film residues, and the film residues extruded by the extrusion device enter the film residue drying device for drying.

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