Ammonium nitrate treatment sedimentation tank

Abstract

The utility model provides an ammonium nitrate treatment settling pond which comprises a cylindrical pond body, a cone is fixedly connected to the inner bottom of the pond body, a collecting tank is arranged between the lower portion of the cone and the inner wall of the pond body, a scraping plate rotating around the axis of the pond body is arranged in the collecting tank, the cone is arranged in a hollow mode, and the scraping plate is arranged in the collecting tank. A plurality of heat exchange pipes are fixedly connected to the inner wall of the conical surface at equal angles, a transverse frame is fixedly connected to the upper end of the pool body, a water inlet pipe is fixedly connected to the transverse frame, and the front end of the water inlet pipe right faces the upper end of the cone. Ammonium nitrate is separated out in a cooling mode, so that ammonium nitrate can be collected, and the economic value is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ammonium nitrate treatment, and particularly to a sedimentation tank for ammonium nitrate treatment. Background Art

[0002] During the production processes of urea, synthetic ammonia, methanol, catalysts, etc., during the catalytic production process, nitrate wastewater will be generated in the catalyst workshop, and ammonium nitrate is also one of them. The main methods for treating ammonium nitrate wastewater include chemical precipitation, biological treatment, membrane separation, and the evaporation concentration crystallization technology developed in recent years.

[0003] In chemical precipitation, by pre-adjusting the pH value of the wastewater and using precipitants such as lime and sodium hydroxide, ammonia gas will inevitably be generated during the treatment process. Therefore, the technical requirements for sealing treatment are relatively high, and certain technical requirements are also needed for the collection and storage of the generated ammonia gas. The biological treatment method utilizes microorganisms, bacteria, etc. to absorb and convert ammonium nitrate, thereby achieving the effect of wastewater purification. However, this method is suitable for low-concentration wastewater. At the same time, the ammonium nitrate in the wastewater is absorbed and converted, and it cannot be collected to expand the economic effect. For evaporation concentration, although the collection of ammonium nitrate can be achieved, the heating method undoubtedly consumes a large amount of energy. If the evaporation is carried out by sunlight exposure, the occupied area of the sunlight exposure pool is relatively large. At the same time, affected by the weather, this type is usually not suitable for use in areas with low altitude and high latitude. Summary of the Invention

[0004] To solve the above problems, the present invention discloses a sedimentation tank for ammonium nitrate treatment, which includes a cylindrical tank body. A cone is fixedly connected to the inner bottom of the tank body. The space between the lower part of the cone and the inner wall of the tank body is a collection tank, and a scraper that rotates around the axis of the tank body is arranged in the collection tank. During the sedimentation treatment, the sediment slides down along the conical surface of the cone into the collection tank, and the scraper scrapes and centrally treats the sediment, having the advantage of aggregating the sediment.

[0005] The cone is hollowly arranged, and a plurality of heat exchange tubes are fixedly connected to the inner wall of the conical surface at equal angles. A cross frame is fixedly connected to the upper end of the tank body, and a water inlet pipe is fixedly connected to the cross frame. The front end of the water inlet pipe is directly opposite to the upper end of the cone. Since the solubility of ammonium nitrate is about 120 g at 0 °C and about 200 g at 20 °C, and the solubility of ammonium nitrate is very large, refrigerant is introduced into the heat exchange tubes to cool the treated water. Even in the case of a relatively small cooling range, a large amount of ammonium nitrate can be precipitated. At the same time, the front end of the water pipe is directly opposite to the upper end of the cone, so the treated water sent out will flow downward along the conical surface and contact the conical surface for heat exchange during the process, thereby realizing the precipitation of ammonium nitrate. The precipitated nitrate is converged into the collection tank under the impact of the flowing water, which is convenient for collection. Finally, the water in the upper and middle parts of the tank is pumped out and subjected to reverse osmosis treatment again for concentration, and the concentrated water is sent back to the tank body for treatment to form a cycle.

[0006] Preferably, the upper ends of the heat exchange tubes are all interconnected and fixedly connected with a refrigerant inlet pipe, and the lower ends of the heat exchange tubes are all interconnected and fixedly connected with a refrigerant outlet pipe, and both the refrigerant inlet pipe and the refrigerant outlet pipe extend downward. That is, the refrigerant is pumped in through the refrigerant inlet pipe, passes through the heat exchange tubes, and finally is sent out through the refrigerant outlet pipe. And a substance conducive to heat exchange, such as heat exchange silicone grease, is filled inside the cone to enable better heat exchange between the refrigerant and the conical surface.

[0007] Preferably, a precipitation outlet pipe is fixedly connected to the bottom edge of the pool body, and the upper end of the precipitation outlet pipe is communicated with the collection tank. During the movement of the scraper in the collection tank, the ammonium nitrate precipitate in the collection tank is pushed into the precipitation outlet pipe, and at this time, the precipitate can be discharged from the precipitation outlet pipe.

[0008] Preferably, a fixed sleeve is fixedly connected to the middle of the cross frame, and the water inlet pipe passes through the fixed sleeve. The provided fixed sleeve can fix the water inlet pipe.

[0009] Preferably, a rotating sleeve is rotatably connected to the fixed sleeve, a rotating arm is fixedly connected to the lower side wall of the rotating sleeve, and the other end of the rotating arm is fixedly connected to the upper end of the scraper. When the rotating sleeve rotates, the scraper can be pushed to rotate by means of the rotating arm.

[0010] Preferably, a driving motor is fixedly connected to the cross frame, a second belt pulley is fixedly connected to the output end of the driving motor, a first belt pulley is fixedly connected to the upper part of the rotating sleeve, and a belt is sleeved on the first belt pulley and the second belt pulley. When the driving motor is started, the rotating sleeve is driven to rotate by means of the second belt pulley, the belt and the first belt pulley, and finally the rotation of the scraper is realized.

[0011] Preferably, a plurality of support columns are fixedly connected to the lower end of the pool body. The support columns are used to support and fix the pool body.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. The wastewater treated by reverse osmosis is sent into the sedimentation tank, and the sedimentation tank adopts a cooling method to realize the precipitation of ammonium nitrate in the wastewater. Since the solubility of ammonium nitrate changes greatly with temperature, a large amount of ammonium nitrate can be precipitated even under a small temperature drop, and at the same time, other salts are relatively less precipitated. By adopting this method, the purity of ammonium nitrate can be improved and the economic value can be increased.

[0014] 2. A cone is arranged inside the nitric acid pool, and the wastewater flows along the conical surface, which is beneficial to heat exchange and at the same time flushes the precipitated ammonium nitrate into the collection tank, facilitating the collection of ammonium nitrate. Description of the Drawings

[0015] Figure 1Schematic three-dimensional view of the present invention;

[0016] Figure 2 Schematic bottom view of the present invention;

[0017] Figure 3 Schematic sectional view of the present invention;

[0018] Figure 4 is Figure 3 an enlarged view of part A in

[0019] List of reference numerals:

[0020] 1, pool body; 2, cone; 3, support column; 4, precipitation outlet pipe; 5, cross frame; 6, drive motor; 7, water inlet pipe; 8, refrigerant inlet pipe; 9, refrigerant outlet pipe; 10, collection tank; 11, heat exchange pipe; 12, rotating arm; 13, scraper; 14, fixed sleeve; 15, rotating sleeve; 16, belt; 17, second pulley. Detailed implementation manners

[0021] The present invention will be further clarified below in conjunction with the drawings and specific implementation manners. It should be understood that the following specific implementation manners are only used to illustrate the present invention and not to limit the scope of the present invention. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component respectively.

[0022] As Figures 1 to 4 shown, a ammonium nitrate treatment sedimentation tank includes a cylindrical pool body 1. A cone 2 is fixedly connected to the inner bottom of the pool body 1. The space between the lower part of the cone 2 and the inner wall of the pool body 1 is a collection tank 10. During operation, the water to be treated generates precipitation and falls downward from the conical surface of the cone into the collection tank 10, which is beneficial to the centralized treatment of the precipitation. A scraper 13 that rotates around the axis of the pool body 1 is arranged in the collection tank 10. The arranged scraper 13 can further centrally treat the precipitation in the collection tank 10.

[0023] The conical body 2 is hollow, and a number of heat exchange tubes 11 are fixedly connected to the inner wall of the conical surface at equal angles. The heat exchange tubes 11 are closely attached to the inner wall. When necessary, heat exchange materials such as heat exchange silicone grease need to be added between the heat exchange tubes 11 and the inner wall of the conical surface to improve the heat exchange capacity between the heat exchange tubes 11 and the conical surface. Further, a number of vertical heat conduction plates are arranged on the surface of the conical surface at equal angles to increase the heat exchange area, thereby improving the heat exchange effect. The upper end of the pool body 1 is fixedly connected with a cross frame 5. The cross frame 5 is composed of two main rods, and a number of connecting rods are fixedly connected between the two main rods. The cross frame 5 straddles the upper end of the pool body 1, and both ends of the cross frame 5 are fixedly connected to the edge of the pool body 1. A water inlet pipe 7 is fixedly connected to the cross frame 5 for feeding the water to be treated. The front end of the water inlet pipe 7 faces the upper end of the conical body 2. Due to this setting, the fed water flows downward along the top of the conical surface, and ammonium nitrate is precipitated and cooled during the flowing process. The precipitated ammonium nitrate is washed into the collection tank 10 by the water flow and waits to be centrally treated. At this time, the water in the upper part of the pool body 1 is pumped out. The ammonium nitrate content in this part of the water is relatively low. After being pumped out, it is subjected to reverse osmosis treatment again, and the generated concentrate is sent back to the pool body 1 for precipitation treatment.

[0024] The upper ends of the heat exchange tubes 11 are all interconnected and fixedly connected with a refrigerant inlet pipe 8. That is, the refrigerant enters the heat exchange tubes 11 through the refrigerant inlet pipe 8. The lower ends of the heat exchange tubes 11 are all interconnected and fixedly connected with a refrigerant outlet pipe 9. Both the refrigerant inlet pipe 8 and the refrigerant outlet pipe 9 extend downward. The heat-exchanged refrigerant is finally sent out from the refrigerant outlet pipe 9. In addition, according to actual treatment needs, the refrigerant can also be pumped into the refrigerant outlet pipe 9 and discharged from the refrigerant inlet pipe 8.

[0025] A precipitation outlet pipe 4 is fixedly connected to the bottom edge of the pool body 1, and the upper end of the precipitation outlet pipe 4 is communicated with the collection tank 10 for accommodating the precipitation and sending the precipitation out from the lower end of the precipitation outlet pipe 4. During the operation of the scraper 13, the precipitation is scraped into the precipitation outlet pipe 4.

[0026] A fixed sleeve 14 is fixedly connected to the middle of the cross frame 5, and the water inlet pipe 7 passes through the fixed sleeve 14. The fixed sleeve 14 is used to support and fix the front end of the water inlet pipe 7, and the upper end of the fixed sleeve 14 is a plate structure and is fixedly connected to the cross frame 5 by welding or U-shaped screws.

[0027] A rotating sleeve 15 is rotatably connected to the fixed sleeve 14, that is, the rotating sleeve 15 is sleeved outside the fixed sleeve 14. A flange-like structure is provided at the lower end of the fixed sleeve 14 to support the rotating sleeve 15, and a face bearing is provided at the lower end of the rotating sleeve 15. A rotating arm 12 is fixedly connected to the lower side wall of the rotating sleeve 15, and the other end of the rotating arm 12 is fixedly connected to the upper end of the scraper 13. When the rotating sleeve 15 rotates, the scraper 13 is pushed to rotate in the collection tank 10 by means of the rotating arm 12.

[0028] A driving motor 6 is fixedly connected to the horizontal frame 5. The output end of the driving motor 6 is fixedly connected to a second pulley 17. The upper part of the rotating sleeve 15 is fixedly connected to a first pulley. A belt 16 is sleeved on the first pulley and the second pulley 17. When the driving motor 6 is started, it is transmitted through the second pulley 17, the belt 16 and the first pulley, so as to drive the rotating sleeve 15 to rotate. And the size of the set first pulley is larger than that of the second pulley 17, so as to achieve the effect of calculating and increasing the torque.

[0029] A plurality of support columns 3 are fixedly connected to the lower end of the pool body 1. The support columns 3 are used to support and fix the pool body 1.

[0030] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A sedimentation tank for ammonium nitrate treatment, characterized in that, It includes a cylindrical pool body (1), a conical body (2) is fixedly connected to the inner bottom of the pool body (1), a collection tank (10) is formed between the lower part of the conical body (2) and the inner wall of the pool body (1), and a scraping plate (13) that rotates around the axis of the pool body (1) is arranged in the collection tank (10). The conical body (2) is hollow, and a number of heat exchange tubes (11) are fixedly connected to the inner wall of the conical surface at equal angles. A cross frame (5) is fixedly connected to the upper end of the pool body (1), and a water inlet pipe (7) is fixedly connected to the cross frame (5). The front end of the water inlet pipe (7) faces the upper end of the conical body (2).

2. The ammonium nitrate treatment sedimentation tank according to claim 1, wherein: The upper ends of the heat exchange tubes (11) are all interconnected and fixedly connected to a refrigerant inlet pipe (8). The lower ends of the heat exchange tubes (11) are all interconnected and fixedly connected to a refrigerant outlet pipe (9). Both the refrigerant inlet pipe (8) and the refrigerant outlet pipe (9) extend downward.

3. A sedimentation tank for ammonium nitrate treatment according to claim 1, characterized in that: A precipitation outlet pipe (4) is fixedly connected to the bottom edge of the pool body (1), and the upper end of the precipitation outlet pipe (4) is communicated with the collection tank (10).

4. A sedimentation tank for ammonium nitrate treatment according to claim 1, characterized in that: A fixed sleeve (14) is fixedly connected to the middle of the cross frame (5), and the water inlet pipe (7) passes through the fixed sleeve (14).

5. The ammonium nitrate treatment sedimentation tank according to claim 4, wherein: A rotating sleeve (15) is rotatably connected to the fixed sleeve (14). A rotating arm (12) is fixedly connected to the lower side wall of the rotating sleeve (15), and the other end of the rotating arm (12) is fixedly connected to the upper end of the scraping plate (13).

6. The ammonium nitrate treatment sedimentation tank according to claim 5, characterized in that: A driving motor (6) is fixedly connected to the cross frame (5). A second pulley (17) is fixedly connected to the output end of the driving motor (6). A first pulley is fixedly connected to the upper part of the rotating sleeve (15), and a belt (16) is sleeved on the first pulley and the second pulley (17).

7. A sedimentation tank for ammonium nitrate treatment according to claim 1, characterized in that: A number of support columns (3) are fixedly connected to the lower end of the pool body (1).

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