Ammonia gas drying and purifying device for ultra-pure ammonia production

Abstract

The utility model discloses an ammonia gas drying and purifying device for ultra-pure ammonia production, and relates to the technical field of safety production and storage and transportation safety guarantee of dangerous chemicals. The device comprises a base, a plurality of groups of purification tanks are fixedly connected to the top of the base at equal intervals from left to right, filling assemblies are arranged in the purification tanks, and detection assemblies are further arranged between the adjacent purification tanks. The lead screw in the filling assembly drives the lifting plate and the filling disc to ascend and descend in the purification tank, the filling disc is clamped in the lifting plate through the clamping block, a degreasing agent or water absorption filler in the filling disc can be replaced conveniently, the purity of ammonia purified and dried by the purification tank is detected through a measuring instrument in the detection assembly, and the detection accuracy is improved. Unqualified ammonia gas flows back into the purification tank through a third connecting pipe for secondary purification and drying, so that the problems that in the prior art, filler such as a degreasing agent or water absorption filler is inconvenient to replace, and the purified and dried ammonia gas is inconvenient to detect are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of safe production and storage and transportation of hazardous chemicals, and in particular relates to an ammonia drying and purification device for ultrapure ammonia production. Background Technology

[0002] Ultrapure ammonia is a relatively common hazardous chemical. It is a toxic, flammable, and corrosive gas and a very important raw material in the optoelectronic field. The quality of ultrapure ammonia directly determines the brightness of light-emitting diodes. Therefore, in the production process of ultrapure ammonia, it is often necessary to dry and purify it to remove the impurities it contains. Drying and purification equipment is used to facilitate the clean purification of ultrapure ammonia.

[0003] A document with publication number CN210699474U discloses an ammonia purification device, including an inlet pipe, an oil removal tank connected to the inlet pipe, a first connecting pipe connected to the oil removal tank, a first drying tower connected to the first connecting pipe, a second connecting pipe connected to the oil removal tank, a second drying tower connected to the second connecting pipe, an outlet pipe connected to the first drying tower and the second drying tower respectively, a first regeneration gas pipe connected to the first drying tower, a second regeneration gas pipe connected to the second drying tower, an exhaust pipe for venting air connected to the first drying tower and the second drying tower respectively, and valves respectively installed on the first connecting pipe, the second connecting pipe, the first regeneration gas pipe and the second regeneration gas pipe;

[0004] However, it still has the following drawbacks in practical use:

[0005] The ammonia purification device described above has an oil removal tank filled with an oil removal agent such as activated carbon or modified diatomaceous earth, and the first and second drying towers are filled with water-absorbing packing such as 3A molecular sieves or ammonia-resistant molecular sieves. The ultrapure ammonia is de-oiled and dried through the oil removal tank, the first drying tower, and the second drying tower. However, since the oil removal agent and water-absorbing packing are directly filled inside the tank, it is inconvenient to replace the oil removal agent and water-absorbing packing.

[0006] The ammonia purification device described above has an oil removal tank that is connected to the first drying tower via a first connecting pipe, and the first drying tower and the second drying tower are connected to each other via a second connecting pipe. It lacks a structure for secondary processing of ultrapure ammonia, which results in insufficient purification and drying of ultrapure ammonia by the oil removal tank, the first drying tower and the second drying tower, and a poor drying and purification effect. Utility Model Content

[0007] The purpose of this invention is to provide an ammonia drying and purification device for ultrapure ammonia production. A lead screw in the filling assembly drives a lifting plate and a filling disc to rise and fall within the purification tank. A locking block secures the filling disc to the lifting plate, facilitating the replacement of the degreasing agent or water-absorbing filler within the filling disc. A measuring instrument in the detection assembly detects the purity of the ammonia gas after purification and drying in the purification tank. Unqualified ammonia gas is returned to the purification tank for secondary purification and drying via a third connecting pipe. This invention solves the problems of inconvenience in replacing degreasing agents or water-absorbing fillers and inconvenience in detecting the purified and dried ammonia gas in existing systems.

[0008] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0009] This utility model is an ammonia drying and purification device for ultrapure ammonia production, including a base, and multiple purification tanks are fixedly connected at equal intervals from left to right on the top of the base. The top and bottom of the purification tanks are respectively fixedly connected with a top cover and a bottom cover.

[0010] The purification tank is equipped with a filling assembly. The fixing plates in the filling assembly are fixedly connected to the upper and lower parts of the purification tank. The adjacent fixing plates are movably connected to the lifting plate by a screw rod. The inner side of the lifting plate is fitted with a filling plate. The bottom of the inner side of the filling plate is evenly provided with first through holes. The inner side of the lifting plate is mounted with a locking block inside the groove by a return spring. The end of the locking block away from the lifting plate is fitted with a groove on the outer side of the filling plate.

[0011] A detection assembly is also installed between adjacent purification tanks. The detection housing in the detection assembly is located between adjacent purification tanks. A first connecting pipe runs through the bottom of the detection housing. The end of the first connecting pipe away from the detection housing is fixedly connected to the air outlet pipe on the bottom cover. A second connecting pipe runs through the top of the detection housing. The end of the second connecting pipe away from the detection housing is fixedly connected to the air inlet pipe on the top cover. A first solenoid valve is installed on the second connecting pipe. A measuring instrument is fixedly connected to the lower part of the rear end face inside the detection housing. A third connecting pipe runs through the upper part of the rear end face of the detection housing. The end of the third connecting pipe away from the detection housing is fixedly connected to the return pipe located on the rear end face of the purification tank. A second solenoid valve is installed on the third connecting pipe.

[0012] Furthermore, a second flange is welded to both the top and bottom of the purification tank, and a first flange is welded to both the bottom of the top cover and the top of the bottom cover. The first flange and the second flange are fixedly connected by double-ended bolts.

[0013] Furthermore, one end of the return pipe passes through the upper rear end face of the purification tank and extends to the inside of the purification tank, the bottom end of the air inlet pipe passes through the top of the top cover and extends to the inside of the top cover, and the top end of the air outlet pipe passes through the bottom of the bottom cover and extends to the inside of the bottom cover.

[0014] Furthermore, support rods are welded around the bottom of the cover, and the other end of the support rods is fixedly connected to the top of the base.

[0015] Furthermore, a servo motor is fixedly connected to the fixed plate located below the purification tank via a motor frame. The output shaft of the servo motor passes through the fixed plate located below and is fixedly connected to the bottom end of the lead screw. The top end of the lead screw is rotatably connected to the lower surface of the fixed plate located above, and the front end of the lifting plate is threaded onto the outer wall of the lead screw.

[0016] Furthermore, sliding rods are welded to both sides of the rear end of adjacent fixed plates, and the sliding rods pass through both sides of the rear end of the lifting plate surface.

[0017] Furthermore, a slider is welded to the top side of the card block, and the top of the slider passes through a through slot located at the top of the mounting slot and is welded with a lever.

[0018] Furthermore, a partition is fixedly connected to the center of the internal part of the detection shell, and a second through hole is evenly opened on the surface of the partition.

[0019] This utility model has the following beneficial effects:

[0020] This invention, by setting up a filling component and using a threaded connection between a lead screw and a lifting plate, allows the lifting plate to move the filling disc to the outside of the purification tank. A return spring then moves the locking block into the groove, thus locking the lifting plate and the filling disc together. This facilitates the removal of the filling disc from the purification tank, making it easier to replace the degreasing agent or water-absorbing filler in the filling disc, and facilitating the drying and purification of ammonia.

[0021] This invention incorporates a detection component, with measuring instruments inside the detection housing, namely an oil and gas detector or a gas moisture meter. These instruments detect the oil or water content in the ammonia gas after purification and drying in the previous purification tank. When the oil or water content exceeds a preset range, the first solenoid valve is closed and the second solenoid valve is opened, allowing the ammonia gas inside the detection housing to return to the previous purification tank through the third connecting pipe and the return pipe for further purification and drying, thus improving the drying and purification effect of the ammonia gas. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a structural disassembly diagram of the purification tank of this utility model;

[0025] Figure 3 This is a schematic diagram of the filling component of this utility model;

[0026] Figure 4 This is a schematic diagram of the lifting plate of this utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the filling disc of this utility model;

[0028] Figure 6 This is a schematic diagram of the structure of the card block of this utility model;

[0029] Figure 7 This is a partial cross-sectional view of the detection component of this utility model.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 1. Base; 2. Purification tank; 21. Top cover; 211. Inlet pipe; 212. First flange; 22. Bottom cover; 221. Outlet pipe; 222. Support rod; 23. Second flange; 231. Double-ended bolt; 24. Return pipe; 3. Filling assembly; 31. Fixing plate; 311. Slide rod; 32. Lead screw; 321. Motor frame; 322. Servo motor; 33. Lifting plate; 331. Mounting slot; 332. Through slot; 34. Filling disc; 341. First through hole; 342. Groove; 35. Locking block; 351. Return spring; 352. Slider; 353. Paddle; 4. Detection assembly; 41. Detection shell; 42. First connecting pipe; 43. Second connecting pipe; 431. First solenoid valve; 44. Partition plate; 441. Second through hole; 45. Measuring instrument; 46. Third connecting pipe; 461. Second solenoid valve. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0033] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, this utility model is an ammonia drying and purification device for ultrapure ammonia production, including a base 1. Multiple purification tanks 2 are fixedly connected at equal intervals from left to right on the top of the base 1. A top cover 21 and a bottom cover 22 are fixedly connected to the top and bottom of the purification tanks 2, respectively. A second flange 23 is welded to the top and bottom of the purification tanks 2. A first flange 212 is welded to the bottom of the top cover 21 and the top of the bottom cover 22. The first flange 212 and the second flange 23 are fixedly connected by double-headed bolts 231. Support rods 222 are welded to the bottom of the bottom of the bottom cover 22. The other end of the support rods 222 is fixedly connected to the top of the base 1.

[0034] Each purification tank 2 is equipped with a filling assembly 3. The fixing plates 31 in the filling assembly 3 are fixedly connected to the upper and lower parts of the purification tank 2. The adjacent fixing plates 31 are movably connected to the lifting plates 33 by the screw rods 32. The servo motor 322 is fixedly connected to the fixing plate 31 located at the lower part of the purification tank 2 by the motor frame 321. The output shaft of the servo motor 322 passes through the lower fixing plate 31 and is fixedly connected to the bottom end of the screw rod 32. The top end of the screw rod 32 is rotatably connected to the lower surface of the upper fixing plate 31. The front end of the lifting plate 33 is threaded onto the outer wall of the screw rod 32. The two sides of the rear end of the adjacent fixing plates 31 are welded with sliding rods 311, which pass through the two sides of the rear end of the lifting plate 33.

[0035] The inner side of the lifting plate 33 is fitted with a filling plate 34 with a clearance. The bottom of the inner side of the filling plate 34 is evenly provided with first through holes 341. The inner side of the lifting plate 33 is mounted with a mounting groove 331 and a locking block 35 is movably connected to it through a reset spring 351. The end of the locking block 35 away from the lifting plate 33 is fitted with a groove 342 located on the outer side of the filling plate 34 with a clearance. A slider 352 is welded to one side of the top of the locking block 35. The top of the slider 352 passes through the through groove 332 located at the top of the mounting groove 331 and is welded with a paddle 353.

[0036] Based on the above settings, during use, firstly, the degreasing agent or water-absorbing filler is placed in the filling tray 34, and the top cover 21 is opened. External force is applied to the locking block 35 by the lever 353, causing the locking block 35 to move inwards towards the mounting groove 331. During the movement of the locking block 35, the return spring 351 is compressed. Next, the filling tray 34 is placed inside the lifting plate 33, and the lever 353 is released. At this time, under the action of the return spring 351, the locking block 35 moves inwards towards the groove 342, achieving a locking connection between the filling tray 34 and the lifting plate 33. Finally, the servo motor 322 is started. After the servo motor 322 starts, its output shaft drives the lead screw 32 to rotate synchronously. Under the action of the threaded connection between the lead screw 32 and the lifting plate 33, the lifting plate 33 drives the filling tray 34 to move inwards towards the purification tank 2, and the top cover 21 is closed, thus realizing the replacement of the degreasing agent or water-absorbing filler.

[0037] Please see Figure 1 , Figure 2 and Figure 7 As shown, a detection assembly 4 is also provided between adjacent purification tanks 2. A detection shell 41 in the detection assembly 4 is located between adjacent purification tanks 2. A first connecting pipe 42 passes through the bottom of the detection shell 41. The end of the first connecting pipe 42 away from the detection shell 41 is fixedly connected to an air outlet pipe 221 on the bottom cover 22. The top end of the air outlet pipe 221 passes through the bottom of the bottom cover 22 and extends to the inside of the bottom cover 22. A second connecting pipe 43 passes through the top of the detection shell 41. The end of the second connecting pipe 43 away from the detection shell 41 is fixedly connected to an air inlet pipe 211 on the top cover 21. The bottom end of the air inlet pipe 211 passes through the top of the top cover 21 and extends to the inside of the top cover 21. A first solenoid valve 431 is provided on the second connecting pipe 43. The inner... A partition plate 44 is fixedly connected to the center of the part. The surface of the partition plate 44 is evenly provided with second through holes 441. A measuring instrument 45 is fixedly connected to the lower part of the rear end face of the inner side of the detection shell 41. The measuring instruments 45 between different purification tanks 2 are oil and gas detectors or gas moisture meters. Both the oil and gas detectors and the gas moisture meters are existing technologies. They detect the oil content and water content in the gas, respectively. A third connecting pipe 46 passes through the upper part of the rear end face of the detection shell 41. The end of the third connecting pipe 46 away from the detection shell 41 is fixedly connected to the return pipe 24 located on the rear end face of the purification tank 2. One end of the return pipe 24 passes through the upper part of the rear end face of the purification tank 2 and extends to the inner side of the purification tank 2. A second solenoid valve 461 is provided on the third connecting pipe 46.

[0038] Based on the above settings, during use, ammonia gas is introduced into the first purification tank 2. The ammonia gas is degreased by the filling material in the first purification tank 2, and the degreased ammonia gas enters the first detection shell 41 through the gas outlet pipe 221 on the first purification tank 2. The oil content in the ammonia gas is detected by the measuring instrument 45 in the first detection shell 41. When the oil content exceeds the preset value range, the first solenoid valve 431 is closed and the second solenoid valve 461 is opened, so that the ammonia gas returns to the interior of the first purification tank 2 through the return pipe 24 on the first purification tank 2 for secondary degreasing. When the oil content is lower than the preset value range, the second solenoid valve 461 is closed and the first solenoid valve 431 is opened, so that the ammonia gas enters the second purification tank 2 through the second connecting pipe 43 for drying.

[0039] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present utility model.

Claims

1. An ammonia drying and purification device for ultrapure ammonia production, comprising a base (1), wherein multiple purification tanks (2) are fixedly connected at equal intervals from left to right on the top of the base (1), and a top cover (21) and a bottom cover (22) are fixedly connected to the top and bottom of the purification tanks (2), respectively, characterized in that: The purification tank (2) is equipped with a filling assembly (3) inside. The fixing plate (31) in the filling assembly (3) is fixedly connected to the upper and lower parts of the purification tank (2) respectively. The fixing plates (31) are movably connected to each other by a screw (32) and a lifting plate (33). The inner side of the lifting plate (33) is fitted with a filling plate (34). The bottom of the inner side of the filling plate (34) is evenly provided with a first through hole (341). The mounting groove (331) on the inner side of the lifting plate (33) is movably connected to a locking block (35) by a reset spring (351). The end of the locking block (35) away from the lifting plate (33) is fitted with a groove (342) on the outer side of the filling plate (34). A detection assembly (4) is also provided between adjacent purification tanks (2). The detection shell (41) in the detection assembly (4) is located between adjacent purification tanks (2). A first connecting pipe (42) passes through the bottom of the detection shell (41). The end of the first connecting pipe (42) away from the detection shell (41) is fixedly connected to the air outlet pipe (221) on the bottom cover (22). A second connecting pipe (43) passes through the top of the detection shell (41). The end of the second connecting pipe (43) away from the detection shell (41) is connected to the air outlet pipe (221) on the bottom cover (22). An air inlet pipe (211) is fixedly connected to the top cover (21), and a first solenoid valve (431) is provided on the second connecting pipe (43). A measuring instrument (45) is fixedly connected to the lower part of the inner rear end face of the detection shell (41). A third connecting pipe (46) passes through the upper part of the rear end face of the detection shell (41). The end of the third connecting pipe (46) away from the detection shell (41) is fixedly connected to the return pipe (24) located on the rear end face of the purification tank (2). A second solenoid valve (461) is provided on the third connecting pipe (46).

2. The ammonia gas drying and purifying device for ultra-pure ammonia production according to claim 1, characterized in that, The top and bottom of the purification tank (2) are both welded with second flanges (23), the bottom of the top cover (21) and the top of the bottom cover (22) are both welded with first flanges (212), and the first flanges (212) and the second flanges (23) are fixedly connected by double-headed bolts (231).

3. The ammonia gas drying and purifying device for ultra-pure ammonia production according to claim 1, characterized in that, One end of the return pipe (24) passes through the upper rear end face of the purification tank (2) and extends to the inner side of the purification tank (2). The bottom end of the air inlet pipe (211) passes through the top of the top cover (21) and extends to the inner side of the top cover (21). The top end of the air outlet pipe (221) passes through the bottom of the bottom cover (22) and extends to the inner side of the bottom cover (22).

4. The ammonia drying and purification device for ultrapure ammonia production according to claim 1, characterized in that, Support rods (222) are welded around the bottom of the bottom cover (22), and the other end of the support rods (222) is fixedly connected to the top of the base (1).

5. The ammonia gas drying and purifying device for ultra-pure ammonia production according to claim 1, characterized in that, A servo motor (322) is fixedly connected to the fixed plate (31) located below the interior of the purification tank (2) via a motor frame (321). The output shaft of the servo motor (322) passes through the fixed plate (31) located below and is fixedly connected to the bottom end of the lead screw (32). The top end of the lead screw (32) is rotatably connected to the lower surface of the fixed plate (31) located above. The front end of the lifting plate (33) is threaded onto the outer wall of the lead screw (32).

6. The ammonia gas drying and purifying device for ultra-pure ammonia production according to claim 5, characterized in that, Slide rods (311) are welded to both sides of the rear end of adjacent fixed plates (31), and the slide rods (311) pass through both sides of the rear end of the surface of the lifting plate (33).

7. The ammonia gas drying and purifying device for ultra-pure ammonia production according to claim 1, characterized in that, A slider (352) is welded to one side of the top of the card block (35), and the top of the slider (352) passes through the through slot (332) located at the top of the mounting slot (331) and is welded with a paddle (353).

8. The ammonia gas drying and purifying device for ultra-pure ammonia production according to claim 1, characterized in that, A partition (44) is fixedly connected to the center of the inside of the detection shell (41), and a second through hole (441) is uniformly opened on the surface of the partition (44).

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