A device for condensing and filtering ammonia gas for reuse in alkaline etching

Abstract

The application relates to the ammonia recovery treatment technical field and discloses an alkali etching ammonia gas condensation filtering recycling device, which comprises a recovery tower, an air inlet pipe is arranged at the top of the recovery tower, a filter plate is fixedly connected in the recovery tower, an air exhaust pipe is arranged at the bottom of the recovery tower, an air exhaust machine is arranged in the air exhaust pipe, an exhaust pipe is fixedly arranged at the other end of the air exhaust pipe, an evaporative condenser is fixedly arranged at the other end of the exhaust pipe, a cooling cylinder containing cooling liquid is arranged between the evaporative condenser and the recovery tower, the exhaust pipe passes through the cooling cylinder, and a turnover assembly for turning over the cooling liquid is arranged in the cooling cylinder. According to the technical scheme, the ammonia gas can be pre-cooled during condensation through the mutual cooperation of the recovery tower, the air inlet pipe, the filter plate, the air exhaust pipe, the air exhaust machine, the exhaust pipe, the evaporative condenser, the cooling cylinder, the air cylinder and the pushing plate, so that the condensation effect of the ammonia gas can be effectively improved.

Description

Technical Field

[0001] This application relates to the field of ammonia recovery and treatment technology, specifically to an alkaline etching ammonia condensation and filtration reuse device. Background Technology

[0002] Etching is a crucial process in printed circuit board (PCB) manufacturing. However, it requires the use of large amounts of ammonia as a complexing agent. Ammonia is a pollutant that damages the atmosphere and water resources. The etching line operates at temperatures of 50-52 degrees Celsius. Under high temperatures and spray conditions, ammonia is easily drawn away by the exhaust gas tower, resulting in high ammonia concentrations in the exhaust gas tower. This makes it difficult to treat the gas thoroughly, and ammonia nitrogen wastewater treatment plants are challenging to manage. Currently, most treatment of ammonia-containing waste gas relies on condensation technology to ensure that the condensate is combined with the ammonia nitrogen waste gas for recycling. This technology has shown significant treatment effects. The condensed ammonia water is then returned to the etching tank for reuse.

[0003] However, the existing alkaline etching ammonia condensation filtration and reuse devices lack a pretreatment mechanism for ammonia-containing waste gas, which easily leads to poor ammonia condensation effect. Utility Model Content

[0004] The purpose of this application is to provide an alkaline etching ammonia condensation filtration and reuse device, which solves the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This application provides an alkaline etching ammonia gas condensation and filtration recycling device, including a recovery tower. An inlet pipe is installed at the top of the recovery tower, a filter plate is fixedly connected inside the recovery tower, an exhaust pipe is installed at the bottom of the recovery tower, an exhaust fan is installed inside the exhaust pipe, an exhaust pipe is fixedly installed at the other end of the exhaust pipe, an evaporator condenser is fixedly installed at the other end of the exhaust pipe, a cooling cylinder containing coolant is provided between the evaporator condenser and the recovery tower, the exhaust pipe passes through the cooling cylinder, and an agitation component for agitating the coolant is installed inside the cooling cylinder.

[0006] By adopting the above technical solution, during use, ammonia gas is discharged into the recovery tower through the inlet pipe, and then the pump is started to draw the ammonia gas into the extraction pipe. When the ammonia gas enters the filter plate, the filter plate filters out particulate impurities in the ammonia gas. The filtered ammonia gas is then discharged into the exhaust pipe through the extraction pipe, and then into the evaporator condenser for condensation. The condensed ammonia water is then directly injected into the etching line for recycling through the evaporator condenser. When the ammonia gas enters the exhaust pipe inside the cooling cylinder, the coolant inside the cooling cylinder will pre-cool the ammonia gas. At the same time, the coolant is agitated by the turning component, which makes the cross-sectional temperature of the cooling water extremely uniform and prevents local heat dissipation. Through the above structure, the ammonia gas can be pre-cooled during condensation, thereby effectively improving the subsequent condensation effect of ammonia gas.

[0007] Optionally, the agitation assembly includes a cylinder fixedly installed on the outer side wall of one side of the cooling cylinder. The piston end of the cylinder passes through the end of the cooling cylinder and extends outward and is fixedly connected to a push plate. The push plate has a plurality of through holes evenly spaced. The recovery tower is equipped with a cleaning assembly for cleaning impurities on the filter plate.

[0008] By adopting the above technical solution, the cylinder is started, which drives the push plate to move inside the cooling cylinder. The movement of the push plate will push the coolant to make the coolant churn.

[0009] Optionally, the cleaning assembly includes a first air cylinder fixedly connected to the outer side wall of one side of the recovery tower. A first sealing piston is slidably connected inside the first air cylinder. A first piston rod is fixedly connected to one end of the first sealing piston. The other end of the first piston rod passes through the end of the first air cylinder and the side wall of the recovery tower in sequence and extends inward and is fixedly connected to a cleaning plate. The lower end of the cleaning plate abuts against a filter plate. A pushing assembly for driving the first sealing piston is installed on the cooling cylinder. A collection assembly for collecting impurities is installed inside the recovery tower.

[0010] By adopting the above technical solution, the first sealing piston moves inside the first air cylinder by pushing the component. The movement of the first sealing piston drives the first piston rod to move, which in turn drives the cleaning plate to move. The movement of the cleaning plate pushes and cleans the impurities on the filter plate.

[0011] Optionally, the pushing assembly includes a second air cylinder fixedly installed on the outer side wall of the cooling cylinder. The first air cylinder and the second air cylinder are connected by a connecting pipe. A second sealing piston is slidably connected inside the second air cylinder. A second piston rod is fixedly connected to one end of the second sealing piston. The other end of the second piston rod passes through the ends of the second air cylinder and the cooling cylinder in sequence and is connected to the pushing plate.

[0012] By adopting the above technical solution, when the push plate moves, it will drive the second piston rod to move. The movement of the second piston rod will drive the second sealing piston to move inside the second air cylinder. The movement of the second sealing piston will compress the air inside the second air cylinder. The compressed air will enter the first air cylinder through the connecting pipe, and the air will push the first sealing piston to move.

[0013] Optionally, a spring is fixedly connected to the inner wall of one side of the first air cylinder, and the other end of the spring is fixedly connected to the first sealing piston, and the spring is sleeved on the first piston rod.

[0014] By adopting the above technical solution, the spring has elastic potential energy, which facilitates the reset of the first sealing piston.

[0015] Optionally, the collection assembly includes two collection boxes symmetrically and fixedly installed on the inner sidewalls of both sides of the recycling tower, and the filter plate is fixedly installed on the two collection boxes.

[0016] By adopting the above technical solution, the cleaning plate pushes the impurities to move, so that the impurities fall into the collection box.

[0017] Optionally, unloading ports are provided on the symmetrical outer walls on both sides of the recycling tower, and the unloading ports are located at the collection box position. A box cover is installed on the outer wall located at the unloading port position of the recycling tower.

[0018] By adopting the above technical solution, when it is necessary to clean the impurities inside the collection box, simply open the box lid and remove the impurities from the collection box.

[0019] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows: (1) The technical solution of this application can pre-cool ammonia gas during condensation by setting up a recovery tower, an inlet pipe, a filter plate, an extraction pipe, an extraction fan, an exhaust pipe, an evaporator condenser, a cooling cylinder, a cylinder and a push plate, thereby effectively improving the subsequent condensation effect of ammonia gas.

[0020] (2) The technical solution of this application can clean the impurities after filtration by setting up a first air cylinder, a first sealing piston, a first piston rod, a cleaning plate, a second air cylinder, a second sealing piston, a second piston rod, a spring and a collection box, etc., so as to prevent the impurities from clogging the filter holes on the filter plate and affecting the air permeability of the filter plate. Attached Figure Description

[0021] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1This is a schematic diagram of the overall structure of an alkaline etching ammonia condensation filtration and recycling device according to this application. Figure 2 This is a schematic diagram of the overall internal structure of an alkaline etching ammonia condensation filtration and reuse device according to this application. Figure 3 for Figure 2 Enlarged view of section A; Figure 4 for Figure 2 Enlarged view of section B; Figure 5 This is a schematic diagram of the internal structure of the extraction pipe in an alkaline etching ammonia condensation filtration and recycling device according to this application.

[0022] In the diagram: 1. Recovery tower; 2. Inlet pipe; 3. Filter plate; 4. Extraction pipe; 5. Extractor; 6. Exhaust pipe; 7. Evaporator / condenser; 8. Cooling cylinder; 9. Cylinder; 10. Push plate; 11. First cylinder; 12. First sealing piston; 13. First piston rod; 14. Cleaning plate; 15. Second cylinder; 16. Second sealing piston; 17. Second piston rod; 18. Spring; 19. Collection box; 20. Cover. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This application provides a technical solution: an alkaline etching ammonia gas condensation filtration and recycling device, including a recovery tower 1, an inlet pipe 2 installed at the top of the recovery tower 1, a filter plate 3 fixedly connected inside the recovery tower 1, an exhaust pipe 4 installed at the bottom of the recovery tower 1, an exhaust fan 5 installed inside the exhaust pipe 4, an exhaust pipe 6 fixedly installed at the other end of the exhaust pipe 4, an evaporator condenser 7 fixedly installed at the other end of the exhaust pipe 6, a drain port installed at one end of the evaporator condenser 7, and the evaporator condenser 7 is connected to an external circulation device. This is prior art, so it will not be described in detail in this patent document. A cooling cylinder 8 containing coolant is provided between the evaporator condenser 7 and the recovery tower 1. The cooling cylinder 8 is equipped with an injection port and a drain port for injecting and discharging coolant. The exhaust pipe 6 passes through the cooling cylinder 8, and an agitation component for agitating the coolant is installed inside the cooling cylinder 8.

[0025] In the technical solution of this application, during use, ammonia gas is discharged into the recovery tower 1 through the inlet pipe 2, and then the pump 5 is started to draw the ammonia gas into the extraction pipe 4. When the ammonia gas enters the filter plate 3, the filter plate 3 filters the particulate impurities in the ammonia gas. The filtered ammonia gas is then discharged into the exhaust pipe 6 through the extraction pipe 4, and then into the evaporator condenser 7 for condensation. The condensed ammonia water is then directly injected into the etching line for recycling through the evaporator condenser 7. When the ammonia gas enters the exhaust pipe 6 inside the cooling cylinder 8, the coolant inside the cooling cylinder 8 will pre-cool the ammonia gas. At the same time, the coolant is agitated by the turning component, so that the cross-sectional temperature of the cooling water is extremely uniform and there is no local heat dissipation phenomenon. Through the above structure, the ammonia gas can be pre-cooled during condensation, thereby effectively improving the subsequent condensation effect of the ammonia gas.

[0026] In the technical solution of this application, the agitation assembly includes a cylinder 9 fixedly installed on the outer side wall of the cooling cylinder 8. The piston end of the cylinder 9 passes through the end of the cooling cylinder 8 and extends outward and is fixedly connected to a push plate 10. The push plate 10 has several through holes evenly spaced. The recovery tower 1 is equipped with a cleaning assembly for cleaning impurities on the filter plate 3. When the cylinder 9 is started, the cylinder 9 will drive the push plate 10 to move inside the cooling cylinder 8. The movement of the push plate 10 will push the coolant to agitate the coolant.

[0027] In the technical solution of this application, the cleaning component includes a first air cylinder 11 fixedly connected to the outer side wall of the recovery tower 1. A first sealing piston 12 is slidably connected inside the first air cylinder 11. A first piston rod 13 is fixedly connected to one end of the first sealing piston 12. The other end of the first piston rod 13 passes through the end of the first air cylinder 11 and the side wall of the recovery tower 1 and extends inward and is fixedly connected to a cleaning plate 14. The lower end of the cleaning plate 14 abuts against the filter plate 3. A pushing component for driving the first sealing piston 12 to move is installed on the cooling cylinder 8. A collection component for collecting impurities is installed inside the recovery tower 1. The pushing component causes the first sealing piston 12 to move inside the first air cylinder 11. The movement of the first sealing piston 12 will drive the first piston rod 13 to move. The movement of the first piston rod 13 will drive the cleaning plate 14 to move. The movement of the cleaning plate 14 will push and clean the impurities on the filter plate 3. Through the above structure, the filtered impurities can be cleaned to prevent the impurities from clogging the filter holes on the filter plate 3 and affecting the air permeability of the filter plate 3.

[0028] In the technical solution of this application, the pushing component includes a second air cylinder 15 fixedly installed on the outer side wall of the cooling cylinder 8. The first air cylinder 11 and the second air cylinder 15 are connected by a connecting pipe. A second sealing piston 16 is slidably connected inside the second air cylinder 15. A second piston rod 17 is fixedly connected to one end of the second sealing piston 16. The other end of the second piston rod 17 passes through the ends of the second air cylinder 15 and the cooling cylinder 8 in sequence and is connected to the pushing plate 10. When the pushing plate 10 moves, it will drive the second piston rod 17 to move. The movement of the second piston rod 17 will drive the second sealing piston 16 to move inside the second air cylinder 15. The movement of the second sealing piston 16 will compress the air inside the second air cylinder 15. The compressed air will enter the first air cylinder 11 through the connecting pipe. The air will then push the first sealing piston 12 to move.

[0029] In the technical solution of this application, a spring 18 is fixedly connected to the inner wall of one side of the first air cylinder 11, and the other end of the spring 18 is fixedly connected to the first sealing piston 12. The spring 18 is sleeved on the first piston rod 13. The spring 18 has elastic potential energy, which facilitates the reset of the first sealing piston 12.

[0030] In the technical solution of this application, the collection component includes two collection boxes 19 symmetrically and fixedly installed on the inner sidewalls of both sides of the recovery tower 1, a filter plate 3 fixedly installed on the two collection boxes 19, and a cleaning plate 14 pushing the impurities to move so that the impurities fall into the collection box 19.

[0031] In the technical solution of this application, discharge ports are provided on the symmetrical outer walls on both sides of the recovery tower 1, and the discharge ports are located at the collection box 19. A box cover 20 is installed on the outer wall at the discharge port of the recovery tower 1. When it is necessary to clean the impurities inside the collection box 19, the box cover 20 is opened and the impurities are taken out from the collection box 19.

[0032] During operation, ammonia gas is discharged into the recovery tower 1 through the inlet pipe 2. Then, the vacuum pump 5 is started to draw the ammonia gas into the vacuum pipe 4. When the ammonia gas enters the filter plate 3, the filter plate 3 filters out particulate impurities in the ammonia gas. The filtered ammonia gas is then discharged into the exhaust pipe 6 through the vacuum pipe 4, and then into the evaporator condenser 7 for condensation. The condensed ammonia water is then directly injected into the etching line for recycling through the evaporator condenser 7. When the ammonia gas enters the exhaust pipe 6 inside the cooling cylinder 8, the coolant inside the cooling cylinder 8 will pre-cool the ammonia gas. At the same time, the cylinder 9 is started, which drives the push plate 10 to move inside the cooling cylinder 8. The movement of the push plate 10 will push the coolant to make the coolant tumble, so that the cross-sectional temperature of the cooling water is extremely uniform and there will be no local heat dissipation.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An alkaline etching ammonia gas condensation and filtration recycling device, comprising a recovery tower (1), characterized in that: An air inlet pipe (2) is installed at the top of the recovery tower (1). A filter plate (3) is fixedly connected inside the recovery tower (1). An air extraction pipe (4) is installed at the bottom of the recovery tower (1). An air extraction machine (5) is installed inside the air extraction pipe (4). An exhaust pipe (6) is fixedly installed at the other end of the air extraction pipe (4). An evaporator condenser (7) is fixedly installed at the other end of the exhaust pipe (6). A cooling cylinder (8) containing coolant is provided between the evaporator condenser (7) and the recovery tower (1). The exhaust pipe (6) passes through the cooling cylinder (8). An agitation component for agitating the coolant is installed inside the cooling cylinder (8).

2. The alkaline etching ammonia condensation and filtration recycling device according to claim 1, characterized in that, The agitation assembly includes a cylinder (9) fixedly installed on the outer side wall of the cooling cylinder (8). The piston end of the cylinder (9) passes through the end of the cooling cylinder (8) and extends outward and is fixedly connected to a push plate (10). The push plate (10) has several through holes evenly spaced. The recovery tower (1) is equipped with a cleaning assembly for cleaning impurities on the filter plate (3).

3. The alkaline etching ammonia gas condensation and filtration recycling device according to claim 2, characterized in that, The cleaning assembly includes a first air cylinder (11) fixedly connected to the outer side wall of the recovery tower (1). A first sealing piston (12) is slidably connected inside the first air cylinder (11). A first piston rod (13) is fixedly connected to one end of the first sealing piston (12). The other end of the first piston rod (13) passes through the end of the first air cylinder (11) and the side wall of the recovery tower (1) and extends inward and is fixedly connected to a cleaning plate (14). The lower end of the cleaning plate (14) abuts against the filter plate (3). A pushing assembly for driving the first sealing piston (12) is installed on the cooling cylinder (8). A collection assembly for collecting impurities is installed inside the recovery tower (1).

4. The alkaline etching ammonia condensation and filtration recycling device according to claim 3, characterized in that, The pushing assembly includes a second air cylinder (15) fixedly installed on the outer side wall of the cooling cylinder (8). The first air cylinder (11) and the second air cylinder (15) are connected by a connecting pipe. A second sealing piston (16) is slidably connected inside the second air cylinder (15). A second piston rod (17) is fixedly connected to one end of the second sealing piston (16). The other end of the second piston rod (17) passes through the ends of the second air cylinder (15) and the cooling cylinder (8) in sequence and is connected to the push plate (10).

5. The alkaline etching ammonia condensation and filtration recycling device according to claim 3, characterized in that, A spring (18) is fixedly connected to the inner wall of one side of the first air cylinder (11), and the other end of the spring (18) is fixedly connected to the first sealing piston (12), and the spring (18) is sleeved on the first piston rod (13).

6. The alkaline etching ammonia condensation and filtration recycling device according to claim 3, characterized in that, The collection assembly includes two collection boxes (19) symmetrically fixedly installed on the inner sidewalls of both sides of the recovery tower (1), and the filter plate (3) is fixedly installed on the two collection boxes (19).

7. The alkaline etching ammonia condensation and filtration recycling device according to claim 6, characterized in that, The recycling tower (1) has unloading ports on its two symmetrical outer side walls, and the unloading ports are located in the collection box (19). A box cover (20) is installed on the outer side wall located at the unloading port of the recycling tower (1).

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