Solar cell wet chain type double-groove independent operation system

Abstract

The utility model belongs to the field of photovoltaic technology, and relates to a solar cell wet process chain type double-groove independent operation system which comprises a groove body, two storage cylinders located below the groove body, two groups of water inlet pipes and two groups of water outlet pipes, the groove body is divided into two side-by-side reaction grooves by a middle partition structure, a group of conveying devices is arranged in each reaction groove, and the conveying devices are arranged in the groove body. The reaction tank comprises a plurality of reaction areas and a plurality of overflow areas which are separated front and back by cofferdams, and the storage cylinder, the water inlet pipe, the reaction tank and the water outlet pipe are circularly connected to form a circulating pipeline; the water inlet pipe is connected with the lower part of the storage cylinder and the bottom of the reaction area of the corresponding reaction tank, a water inlet valve and a water pump for pumping etching liquid to the reaction area of the corresponding reaction tank are arranged on the water inlet pipe, and the water outlet pipe is connected with the upper part of the storage cylinder and the bottom of the overflow area of the corresponding reaction tank. According to the system, fluid circulation of the two reaction tanks is mutually independent, so that the risk of mutual pollution caused by mutual streaming of etching liquid is avoided, and the utilization rate of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, and particularly relates to a wet-process chain double-tank independent operation system for solar cells. Background Art

[0002] The wet-process chain equipment is very important equipment in the production of solar cells. Silicon wafers are basically transported on the wet-process chain equipment by means of roller transportation. The advantages of this equipment are low cost, high production capacity, and large market demand.

[0003] Chinese Patent CN208861946U discloses a chain-type circulating transmission tank structure, which can send the etching solution in the storage tank to the reaction tank above by means of a pump. In order to improve the operation efficiency, the reaction tank can be made into a double-channel tank body. However, there is a problem if only two sets of transmission rollers are arranged in the reaction tank. The double-channel tank body structure is adopted, but the A / B sides are connected, resulting in the problem that if there is a problem with the etching solution on any one side, it will affect the etching solution on the other side, causing the entire equipment to stop, and the operating rate of the equipment is easily affected.

[0004] Therefore, it is necessary to improve the equipment structure to solve the above problems. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a wet-process chain double-tank independent operation system for solar cells, which can make the etching solutions in the two reaction tanks of the double-channel wet-process chain equipment independent of each other, avoid the risk of mutual contamination caused by the mutual flow of the etching solutions, and only need to stop working on one side when there is a problem on one side, improving the operating rate of the equipment.

[0006] The utility model realizes the above purpose through the following technical solutions: A wet-process chain double-tank independent operation system for solar cells includes a tank body, two storage cylinders located below the tank body, two groups of water inlet pipes and two groups of water outlet pipes. The tank body is separated into two side-by-side reaction tanks by a central partition structure. Each reaction tank is provided with a set of conveying devices, and the conveying direction of the conveying devices is parallel to the length direction of the partition structure. The reaction tank includes a number of reaction zones and a number of overflow zones separated by weirs front and back. One storage cylinder, one water inlet pipe, one reaction tank and one water outlet pipe are connected in a cycle to form a cycle pipeline, and the whole system includes two independent cycle pipelines; the water inlet pipe is connected to the lower part of the storage cylinder and the bottom of the reaction zone of the corresponding reaction tank, and the water inlet pipe is provided with a water inlet valve and a water pump for pumping the etching solution to the reaction zone of the corresponding reaction tank. The water outlet pipe is connected to the upper part of the storage cylinder and the bottom of the overflow zone of the corresponding reaction tank.

[0007] Specifically, each side of each reaction zone is provided with an upper liquid level gauge for displaying the liquid level of the reaction zone, and each side of each storage cylinder is provided with a lower liquid level gauge for displaying the liquid level of the storage cylinder.

[0008] Further, the two storage tanks are arranged one in front of the other below the tank body, and the two water inlet valves and the two lower liquid level gauges are arranged on the same side of the tank body.

[0009] Specifically, a return water pipe is further provided between the reaction zone and the corresponding storage tank, and a return water valve is provided on the return water pipe.

[0010] Further, a drain pipe is provided at the bottom of the storage tank, and a drain valve is provided on the drain pipe.

[0011] Further, a connecting pipe communicating with the upper part of the storage tank is provided at the outlet node of the drain valve.

[0012] The beneficial effects of the technical solution of the present utility model are as follows:

[0013] This system can be used in a wet process chain production line, equivalent to two wet process devices, except that the two reaction tanks are designed on the same large tank body; however, the fluid circulation of the two reaction tanks is independent of each other and there will be no exchange of etching solution. Therefore, if there is a problem with the etching solution in one of the reaction tanks, it will not flow to the other reaction tank, avoiding the risk of mutual contamination caused by the cross-flow of etching solution. When a problem occurs on one side, only the single side needs to stop working, improving the equipment utilization rate. Description of the Drawings

[0014] Figure 1 Fig. is a perspective view of the wet process chain type double-tank independent operation system for solar cells in the embodiment;

[0015] Figure 2 Fig. is a schematic pipeline diagram of the wet process chain type double-tank independent operation system for solar cells.

[0016] The numbers in the figures represent:

[0017] 1 - tank body, 11 - partition structure, 12a - first reaction tank, 12b - second reaction tank, 121 - cofferdam, 122 - reaction zone, 123 - overflow zone, 124 - upper liquid level gauge;

[0018] 2a - first storage tank, 2b - second storage tank, 21 - lower liquid level gauge;

[0019] 3a - first water inlet pipe, 3b - second water inlet pipe, 31 - water inlet valve, 32 - water pump;

[0020] 4a - first water outlet pipe, 4b - second water outlet pipe;

[0021] 5a - first return water pipe, 5b - second return water pipe, 51 - return water valve;

[0022] 6 - drain pipe, 61 - drain valve, 62 - connecting pipe;

[0023] 7 - Conveyor device. Detailed implementation

[0024] The present utility model will be further described in detail below in conjunction with specific embodiments.

[0025] Embodiment:

[0026] As Figure 1 and Figure 2 shown, the wet - type chain double - tank independent operation system of the solar cell of the present utility model includes a tank body 1, two storage tanks (the first storage tank 2a, the second storage tank 2b) located below the tank body 1, two groups of inlet pipes (the first inlet pipe 3a, the second inlet pipe 3b) and two groups of outlet pipes (the first outlet pipe 4a, the second outlet pipe 4b). The tank body 1 is separated by a central partition structure 11 into two reaction tanks (the first reaction tank 12a, the second reaction tank 12b) arranged side by side. Each reaction tank is provided with a group of conveyor devices 7. The conveying direction of the conveyor device 7 is parallel to the length direction of the partition structure 11. The reaction tank includes a number of reaction zones 122 and a number of overflow zones 123 separated by weirs 121 front and back. The first storage tank 2a, the first inlet pipe 3a, the first reaction tank 12a and the first outlet pipe 4a are connected in a cycle to form an independent circulation pipeline. The second storage tank 2b, the second inlet pipe 3b, the second reaction tank 12b and the second outlet pipe 4b are connected in a cycle to form another independent circulation pipeline.

[0027] This system can be used on a wet - type chain production line, equivalent to two wet - type devices, except that the two reaction tanks are designed on the same large tank body 1; however, the fluid circulation of the two reaction tanks is independent of each other, and there will be no exchange of etching solution. Therefore, if there is a problem with the etching solution in one reaction tank, it will not flow into the other reaction tank, avoiding the risk of mutual contamination caused by the cross - flow of etching solution. When a problem occurs on one side, only the corresponding side needs to stop working, improving the equipment utilization rate.

[0028] As Figure 2 shown, the first inlet pipe 3a is connected to the lower part of the first storage tank 2a and the bottom of the reaction zone 122 of the first reaction tank 12a. The first inlet pipe 3a is provided with an inlet valve 31 and a water pump 32 for pumping the etching solution to the reaction zone 122 of the first reaction tank 12a. The first outlet pipe 4a is connected to the upper part of the first storage tank 2a and the bottom of the overflow zone 123 of the first reaction tank 12a. The second inlet pipe 3b is connected to the lower part of the second storage tank 2b and the bottom of the reaction zone 122 of the second reaction tank 12b. The second inlet pipe 3b is provided with an inlet valve 31 and a water pump 32 for pumping the etching solution to the reaction zone 122 of the second reaction tank 12b. The second outlet pipe 4b is connected to the upper part of the second storage tank 2b and the bottom of the overflow zone 123 of the second reaction tank 12b.

[0029] As Figure 1 andFigure 2 As shown, a top liquid level gauge 124 for displaying the liquid level of each reaction zone 122 is provided on each side of the reaction zone 122.

[0030] The liquid level height in the reaction zone 122 needs to be between the highest point and the lowest point of the conveying roller. If the liquid level is too high, the solar cell will be completely immersed, and it cannot be controlled that only the lower surface of the solar cell is processed; if the liquid level is too low, the conveying roller cannot contact the etching solution and cannot bring the etching solution to the lower surface of the solar cell. In practical applications, the upper part of the tank body 1 is closed, so the liquid level in the tank body 1 cannot be directly visually observed. Therefore, it is necessary to use the principle of communicating vessels to make the top liquid level gauge 124 reflect the liquid level height in the reaction zone 122, which is convenient for the operator to control.

[0031] As Figure 1 and Figure 2 shown, a bottom liquid level gauge 21 for displaying the liquid level of each storage tank is provided on each side of the storage tank.

[0032] Too much or too little etching solution in the storage tank will cause the liquid level in the reaction tank to be difficult to maintain balance. The storage tank is a closed box, so the liquid level in the storage tank cannot be directly visually observed. Therefore, it is necessary to use the principle of communicating vessels to make the bottom liquid level gauge 21 reflect the liquid level height in the storage tank, which is convenient for the operator to control.

[0033] As Figure 1 shown, the first storage tank 2a and the second storage tank 2b are arranged one in front of the other below the tank body 1, and two water inlet valves 31 and two bottom liquid level gauges 21 are arranged on the same side of the tank body 1.

[0034] This design structure enables the operation of the water inlet valve 31 and the observation of the bottom liquid level gauge 21 to be completed on the same side of the tank body 1, which is convenient for the operator to adjust the opening degree of the water inlet valve 31 while observing the bottom liquid level gauge 21.

[0035] As Figure 2 shown, a first return water pipe 5a is further provided between the reaction zone 122 of the first reaction tank 12a and the first storage tank 2a, and a second return water pipe 5b is further provided between the reaction zone 122 of the second reaction tank 12b and the second storage tank 2b. Return water valves 51 are provided on both the first return water pipe 5a and the second return water pipe 5b.

[0036] When the system is working normally, the return water valve 51 should be closed, so that the circulation only occurs in the water inlet pipe and the water outlet pipe. When the work is completed, the etching solution in the reaction zone 122 needs to be drained completely. However, blocked by the cofferdam 121, the etching solution in the reaction zone 122 cannot directly return to the storage tank through the overflow zone 123. Therefore, it is necessary to open the return water valve 51 to directly drain the remaining etching solution in the reaction zone 122 into the corresponding storage tank.

[0037] A drain pipe 6 is provided at the bottom of the storage tank. A drain valve 61 is provided on the drain pipe 6, and a connecting pipe 62 communicating with the upper part of the storage tank is provided at the outlet node of the drain valve 61.

[0038] If the etching solution needs to be replaced, the drain valve 61 on the drain pipe 6 can be directly opened to completely drain it. To avoid the internal air pressure of the closed storage tank causing the drain pipe 6 to be unable to drain, the connecting pipe 62 is used to connect the outlet of the drain valve 61 with the upper part of the storage tank, so that gravity will naturally drain the etching solution.

[0039] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A solar cell wet chain double-tank independent operation system, characterized by: The invention comprises a tank body, two storage cylinders located below the tank body, two groups of water inlet pipes and two groups of water outlet pipes. The tank body is divided into two parallel reaction tanks by a central baffle structure. Each reaction tank is provided with a group of conveying devices. The conveying direction of the conveying devices is parallel to the length direction of the baffle structure. The reaction tank comprises a plurality of reaction areas and a plurality of overflow areas separated by a cofferdam. A storage cylinder, a water inlet pipe, a reaction tank and a water outlet pipe are circularly connected to form a circulation pipeline. The whole system comprises two independent circulation pipelines. The water inlet pipe connects the lower part of the storage cylinder and the bottom of the reaction area of ​​the corresponding reaction tank. The water inlet pipe is provided with a water inlet valve and a water pump for pumping etching liquid to the reaction area of ​​the corresponding reaction tank. The water outlet pipe connects the upper part of the storage cylinder and the bottom of the overflow area of ​​the corresponding reaction tank.

2. The solar cell wet chain double tank independent operation system according to claim 1 is characterized by: An upper liquid level gauge is provided on the side of each reaction zone to display the liquid level of the reaction zone, and a lower liquid level gauge is provided on the side of each storage cylinder to display the liquid level of the storage cylinder.

3. The solar cell wet chain double tank independent operation system according to claim 2, characterized in that: Two storage cylinders are arranged front and back below the tank body, and two water inlet valves and two lower liquid level gauges are arranged on the same side of the tank body.

4. The solar cell wet chain double tank independent operation system according to claim 1, characterized in that: A water return pipe is also provided between the reaction zone and the corresponding storage cylinder, and a water return valve is provided on the water return pipe.

5. The solar cell wet chain double-tank independent operation system according to claim 1 or 4, characterized in that: A drainage pipe is provided at the bottom of the storage cylinder, and a drainage valve is provided on the drainage pipe.

6. The solar cell wet chain double tank independent operation system according to claim 5, characterized in that: The outlet node of the drain valve is provided with a connecting pipe connected to the upper part of the storage cylinder.

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