Negative pressure cooling tower for producing potassium nitrate

Abstract

The utility model relates to a negative pressure cooling tower for producing potassium nitrate, and belongs to the technical field of cooling equipment. The device mainly comprises a cylinder body, a lower sealing head, an upper sealing head, a water baffle, an exhaust pipe, a liquid outlet pipe, an air inlet pipe, a flow guide plate, a water inlet pipe, a shower nozzle and a mesh plate, water vapor generated by the crystallizing tank enters the cylinder through the air inlet pipe, the flow guide plate disperses the water vapor and reduces the flow speed of the water vapor, the water vapor makes full contact with cooling water in the cooling tower, the cooling water enters the cylinder through the water inlet pipe, heat exchange is conducted between the water vapor and the cooling water, and the water vapor is cooled and condensed into liquid water. The condensed liquid water is discharged out of the barrel through the liquid outlet pipe to be recycled, the exhaust pipe is connected with the vacuum pump to maintain the negative pressure environment in the barrel, the negative pressure environment is beneficial to promoting condensation of water vapor, in the whole working process, the device effectively cools and recycles the water vapor, waste of water resources is reduced, and the device is suitable for popularization and application. Meanwhile, the influence on the environment is also reduced.

Description

Technical Field

[0001] This utility model belongs to the field of cooling equipment technology, specifically relating to a negative pressure cooling tower for the production of potassium nitrate. Background Technology

[0002] During the crystallization process of potassium nitrate, after adding potassium nitrate solution to a crystallization tank and heating it to saturation, the water gradually evaporates, forming water vapor. In the concentrated potassium nitrate solution after evaporation, due to the increase in concentration and decrease in solubility, potassium nitrate crystals gradually precipitate out.

[0003] If this water vapor is directly released into the environment, it will not only waste resources but also potentially harm the environment. Therefore, a negative pressure cooling tower is proposed to discharge water vapor and cool it, causing it to condense into liquid water. This allows for the recycling of water resources and reduces environmental pollution. Utility Model Content

[0004] To overcome the problem that water vapor is generated during the crystallization process of potassium nitrate, and that direct release of this water vapor into the environment would not only waste resources but also potentially harm the environment, this invention provides a negative pressure cooling tower for potassium nitrate production. The water vapor generated in the crystallization tank enters the interior of the tower through an inlet pipe, while cooling water enters the tower through a water inlet pipe. The water vapor and cooling water exchange heat, and the water vapor is cooled and condensed into liquid water. The condensed liquid water is then discharged from the tower through an outlet pipe for recycling, reducing water waste and minimizing environmental impact.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A negative pressure cooling tower for potassium nitrate production mainly includes a cylindrical body, a lower end cap, an upper end cap, a baffle plate, an extraction pipe, a liquid outlet pipe, an air inlet pipe, a guide plate, a water inlet pipe, a shower head, and a perforated plate. The cylindrical body is configured as a cylindrical cavity structure, with at least two sets of ear-type supports symmetrically arranged on the outside of the cylindrical body. The lower end cap and the upper end cap are respectively welded to the top and bottom ends of the cylindrical body to form a sealed cavity. The baffle plate is installed at the bottom end of the upper end cap, and the extraction pipe is installed on the upper end cap and communicates with the inside of the cylindrical body for extraction. A vacuum pump is connected to the top of the pipe to maintain a negative pressure environment inside the cylinder. The outlet pipe for condensate is welded to the bottom of the lower end cap and communicates with the inside of the cylinder. The air inlet pipe for conveying water vapor from the crystallizer is installed in the lower middle part of the side wall of the cylinder. The guide plate for dispersing water vapor and reducing flow rate is installed obliquely inside the cylinder, located on one side of the air inlet pipe. The water inlet pipe for conveying cooling water is installed on the cylinder and extends into the cylinder. The shower head is installed at the bottom of the water inlet pipe. The mesh plate is installed inside the cylinder, located at the bottom of the shower head. Ribs are provided at the connection between the mesh plate and the inner wall of the cylinder.

[0006] The water baffle plate is a multi-stage baffle plate structure.

[0007] A filter screen is installed inside the liquid outlet pipe.

[0008] Both the extraction pipe and the liquid outlet pipe are equipped with flanges, which are connected to external pipes by bolts.

[0009] The guide plate is designed as a semi-circular structure, with circular holes at the beginning to facilitate the passage of water vapor.

[0010] The perforated plate has a hole diameter of 2~5 mm.

[0011] The beneficial effects of this utility model are:

[0012] Water vapor generated in the crystallizer enters the cylinder through the inlet pipe. The guide plate disperses the water vapor and reduces its flow rate, allowing it to fully contact the cooling water in the cooling tower. The cooling water enters the cylinder through the inlet pipe, where the water vapor and cooling water exchange heat. The water vapor is cooled and condenses into liquid water. The condensed liquid water is discharged from the cylinder through the outlet pipe for recycling. The exhaust pipe is connected to a vacuum pump to maintain a negative pressure environment inside the cylinder. This negative pressure environment helps promote the condensation of water vapor. Throughout the entire process, the device effectively cools and recycles water vapor, reducing water waste and minimizing environmental impact. Attached Figure Description

[0013] Figure 1 This is an isometric schematic diagram of the present invention.

[0014] Figure 2 This is a three-dimensional schematic diagram of the present invention.

[0015] Figure 3 This is a partial cross-sectional view of the present invention.

[0016] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0017] Figure 5 yes Figure 3 A magnified view of a section at point B. Detailed Implementation

[0018] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0019] This utility model discloses a negative pressure cooling tower for potassium nitrate production. The negative pressure cooling tower mainly includes a cylindrical body 1, a lower end cap 2, an upper end cap 3, a baffle plate 4, an extraction pipe 5, a liquid outlet pipe 6, an air inlet pipe 7, a guide plate 8, a water inlet pipe 9, a shower head 10, and a perforated plate 11. The cylindrical body 1 is configured as a cylindrical cavity structure. At least two sets of ear-type supports 12 are symmetrically arranged on the outside of the cylindrical body 1. The lower end cap 2 and the upper end cap 3 are respectively welded to the top and bottom ends of the cylindrical body 1 to form a sealed cavity. The baffle plate 4 is installed at the bottom end of the upper end cap 3. The extraction pipe 5 is installed on the upper end cap 3 and communicates with the inside of the cylindrical body 1 for extraction. The top of pipe 5 is connected to a vacuum pump that maintains a negative pressure environment inside the cylinder 1. The outlet pipe 6, which is used to discharge condensate, is welded to the bottom of the lower end cap 2 and communicates with the inside of the cylinder 1. The air inlet pipe 7, which is used to transport water vapor from the crystallization tank, is installed in the lower middle part of the side wall of the cylinder 1. The guide plate 8, which is used to disperse water vapor and reduce flow rate, is installed obliquely inside the cylinder 1 and located on one side of the air inlet pipe 7. The water inlet pipe 9, which is used to transport cooling water, is installed on the cylinder 1 and extends into the inside of the cylinder 1. The shower head 10 is installed at the bottom of the water inlet pipe 9. The mesh plate 11 is installed inside the cylinder 1 and located at the bottom of the shower head 10. A stiffening plate 13 is provided at the connection between the mesh plate 11 and the inner wall of the cylinder 1.

[0020] like Figure 3 , Figure 4 As shown, the baffle plate 4 is a multi-stage baffle structure; the multi-stage baffle structure of the baffle plate 4 can further block and separate water droplets in water vapor, ensuring that the exhaust gas has a low water content.

[0021] like Figure 5 As shown, a filter screen 61 is installed inside the liquid outlet pipe 6; the filter screen 61 is used to filter impurities in the condensate water to ensure the quality of the recycled water.

[0022] like Figure 2 , Figure 4 , Figure 5 As shown, both the extraction pipe 5 and the liquid outlet pipe 6 are equipped with flanges 51, which are connected to the external pipeline by bolts. During installation, the connection can be quickly completed by simply aligning the extraction pipe 5 and the liquid outlet pipe 6 with the flanges 51 of the external pipeline, inserting the bolts, and tightening the nuts, saving installation time and labor costs. When it is necessary to inspect, maintain, or replace parts of the pipeline system, the extraction pipe 5 and the liquid outlet pipe 6 can be easily separated from the external pipeline by simply loosening the bolts without damaging the pipeline itself, thus improving the maintainability and flexibility of the pipeline.

[0023] like Figure 3As shown, the guide plate 8 is configured as a semi-circular structure, and the guide plate 8 has circular holes 81 to facilitate the passage of water vapor; the guide plate 8 can disperse water vapor and reduce its flow rate, so that the water vapor has more time to contact the cooling water in the cylinder 1, thereby improving the cooling effect.

[0024] like Figure 2 , Figure 4 As shown, the perforated plate 11 has a hole diameter of 2~5 mm; it is used to evenly distribute cooling water and increase the gas-liquid contact area.

[0025] Work process:

[0026] At least two sets of lug supports 12 are symmetrically arranged on the outside of the cylinder 1 to facilitate the installation and fixation of the equipment and ensure its stability during operation. A vacuum pump connected to the extraction pipe 5 creates a stable negative pressure environment inside the cylinder 1. This negative pressure environment helps water vapor enter the cylinder 1 more quickly for cooling and condensation. Because the negative pressure lowers the boiling point of water, it significantly improves condensation efficiency. Simultaneously, the stable negative pressure prevents outside air from entering the cylinder 1, ensuring the purity and stability of the cooling process. Cooling water enters the cylinder 1 through the inlet pipe 9 and is evenly sprayed onto the perforated plate 11 through the shower head 10. The perforated plate 11 increases the contact area between water and water vapor, improving the cooling effect. Ribs 13 enhance the structural strength of the perforated plate 11, ensuring its pressure-bearing stability. Saturated water vapor from the crystallizer is drawn through... The steam enters the cylinder 1 through the inlet pipe 7. The semi-circular structure of the guide plate 8 with round holes 81 disperses the water vapor and reduces its flow rate, allowing it to fully contact the cooling water inside the cylinder 1. The decelerated steam forms a counter-current contact with the cooling water flowing from top to bottom under negative pressure. The water vapor and cooling water exchange heat, and the water vapor is cooled and condensed into liquid water. The condensate is collected through the lower end cap 2 and discharged through the outlet pipe 6 with a filter screen 61. The filter screen 61 is used to filter impurities in the condensate to ensure the quality of the recycled water. Uncondensed trace amounts of gas are intercepted by the baffle plate 4 and discharged through the exhaust pipe 5. The multi-stage baffle structure can further block and separate water droplets in the water vapor, ensuring that the discharged gas has a low water content. Throughout the entire operation, the device can effectively cool and recycle water vapor, reducing water waste and environmental impact.

[0027] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A negative pressure cooling tower for the production of potassium nitrate, characterized in that: The negative pressure cooling tower for potassium nitrate production includes a cylindrical body (1), a lower end cap (2), an upper end cap (3), a baffle plate (4), an exhaust pipe (5), a liquid outlet pipe (6), an air inlet pipe (7), a guide plate (8), a water inlet pipe (9), a shower head (10), and a mesh plate (11). The cylindrical body (1) is configured as a cylindrical cavity structure. At least two sets of ear-type supports (12) are symmetrically arranged on the outside of the cylindrical body (1). The lower end cap (2) and the upper end cap (3) are respectively welded to the top and bottom of the cylindrical body (1) to form a closed cavity. The baffle plate (4) is installed at the bottom of the upper end cap (3). The exhaust pipe (5) is installed on the upper end cap (3) and communicates with the inside of the cylindrical body (1). The top of the exhaust pipe (5) is connected to a support cylinder. A vacuum pump with negative pressure environment inside the body (1) is used to discharge condensate. The outlet pipe (6) is welded to the bottom end of the lower head (2) and communicates with the inside of the cylinder (1). The air inlet pipe (7) for conveying water vapor from the crystallizer is installed in the lower middle part of the side wall of the cylinder (1). The guide plate (8) for dispersing water vapor and reducing flow rate is installed obliquely inside the cylinder (1) and located on one side of the air inlet pipe (7). The water inlet pipe (9) for conveying cooling water is installed on the cylinder (1) and extends into the inside of the cylinder (1). The shower head (10) is installed at the bottom end of the water inlet pipe (9). The mesh plate (11) is installed inside the cylinder (1) and located at the bottom end of the shower head (10). A stiffening plate (13) is provided at the connection between the mesh plate (11) and the inner wall of the cylinder (1).

2. The negative pressure cooling tower for producing potassium nitrate as described in claim 1, characterized in that: The water baffle (4) is a multi-stage baffle structure.

3. A negative pressure cooling tower for producing potassium nitrate as described in claim 1 or 2, characterized in that: A filter screen (61) is installed inside the liquid outlet pipe (6).

4. A negative pressure cooling tower for producing potassium nitrate as described in claim 3, characterized in that: The air extraction pipe (5) and liquid outlet pipe (6) are both equipped with flanges (51), and the flanges (51) are connected to the external pipes by bolts.

5. A negative pressure cooling tower for producing potassium nitrate as described in claim 1 or 2, characterized in that: The guide plate (8) is configured as a semi-circular structure, and the guide plate (8) has circular holes (81) to facilitate the passage of water vapor.

6. A negative pressure cooling tower for producing potassium nitrate as described in claim 5, characterized in that: The perforated plate (11) has a hole diameter of 2~5 mm.

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