Waste gas recovery device of ammonia synthesis system

Abstract

The waste gas recovery device comprises a recovery tank, a second separation cavity and a first separation cavity are formed in the upper side and the lower side of an inner cavity of the recovery tank respectively, a first gas inlet pipe and a second gas outlet pipe are fixedly installed at the outer end of the first separation cavity, and a second gas pump is fixedly installed at the position of the second gas inlet pipe; a first valve is fixedly mounted at the first exhaust pipe, a gas separation membrane is fixedly mounted between the second separation cavity and the first separation cavity, a limiting rotating frame is fixedly mounted on the inner side of the second gas inlet pipe through a guide pipe, a rotating rod is rotatably mounted in the second separation cavity, and a driving motor is fixedly mounted at the upper end of the outer wall of the recovery tank. An output shaft of the driving motor is fixedly connected with a rotating shaft of the rotating rod, a through cavity is formed in the periphery of the rotating rod, and an air outlet frame is fixedly installed at the lower end of the rotating rod.

Description

Technical Field

[0001] The utility model relates to the technical field of synthetic ammonia waste gas recovery, in particular to a synthetic ammonia system waste gas recovery device. Background Art

[0002] In the synthetic ammonia industry, the emission and treatment of waste gases have always been a significant environmental issue. Traditional treatment methods are energy-intensive, inefficient, and unable to effectively recover valuable gas components. To address these issues, a synthetic ammonia system waste gas recovery device based on gas separation membrane technology has been proposed. This technology can efficiently separate nitrogen and hydrogen from waste gases, enabling resource recycling. However, existing technologies still have some shortcomings, such as membrane material selection, operating condition optimization, and system integration, which still require further research and improvement. To this end, we have proposed a synthetic ammonia system waste gas recovery device. Utility Model Content

[0003] The purpose of the utility model is to provide a waste gas recovery device for a synthetic ammonia system to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions: A waste gas recovery device for a synthetic ammonia system, comprising a recovery tank, wherein a second separation chamber and a first separation chamber are respectively provided on the upper and lower sides of an inner cavity of the recovery tank, a first air intake pipe and a second exhaust pipe are fixedly mounted on the outer end of the first separation chamber, a first air pump is fixedly mounted on the first air intake pipe, and a second valve is fixedly mounted on the second exhaust pipe, the second air intake pipe and the first exhaust pipe are fixedly mounted on the outer end of the second separation chamber, a second air pump is fixedly mounted on the second air intake pipe, a first valve is fixedly mounted on the first exhaust pipe, a gas separation membrane is fixedly mounted between the second separation chamber and the first separation chamber, a limited rotation frame is fixedly mounted on the inner side of the second air intake pipe through a conduit, a third air outlet pipe is fixedly mounted on the outer end of the limited rotation frame, a third air outlet pipe is fixedly mounted on the third air outlet pipe, a rotating rod is rotatably mounted in the second separation chamber, a drive motor is fixedly mounted on the upper end of the outer wall of the recovery tank, an output shaft of the drive motor is fixedly connected to the rotating shaft of the rotating rod, a through cavity is provided on the outer periphery of the rotating rod, and an air outlet frame is fixedly mounted on the lower end of the rotating rod.

[0005] Preferably, a bracket fixedly connected to the inner wall of the recovery tank is provided in the gas separation membrane, the shape and size of the bracket match the air outlet frame, and the upper end of the bracket fits the air outlet frame.

[0006] Preferably, a dust guide chamber is provided on the outer wall of the recovery tank, a through hole communicating with the dust guide chamber is provided at the lower end of the first separation chamber, a fourth exhaust pipe is fixedly installed at the outer end of the dust guide chamber, and a fourth air pump is fixedly installed at the fourth exhaust pipe.

[0007] Preferably, a sealing block is inserted and installed in the dust guide cavity, a threaded curved groove is provided on the periphery of the sealing block, and a threaded ring threadedly connected to the threaded curved groove is rotatably installed on the outer end of the dust guide cavity.

[0008] Preferably, a threaded rod is fixedly installed on the inner end of the sealing block, a dust collecting frame is provided in the dust guiding chamber, a filter is fixedly installed in the dust collecting frame, a limit seat is fixedly installed on the inner wall of the dust collecting frame, and the limit seat and the threaded rod are plugged into each other.

[0009] Preferably, a threaded sleeve is rotatably mounted on the outer end of the limit seat, the threaded sleeve is threadedly connected to the threaded rod, a driven gear is fixedly mounted on the periphery of the threaded sleeve, and an active gear ring meshing with the driven gear is rotatably mounted on the outer end of the dust collecting frame.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] The waste gas recovery device of the synthetic ammonia system can block nitrogen through the gas separation membrane during the synthetic ammonia waste gas recovery process, thereby achieving the effect of separating nitrogen and hydrogen, thereby improving the waste gas recovery efficiency of the synthetic ammonia, thereby improving resource utilization and reducing environmental pollution.

[0012] This waste gas recovery device for a synthetic ammonia system is provided with an air outlet frame, which can inject air into the upper end of the gas separation membrane and blow down solid impurities such as dust attached to the lower end of the gas separation membrane, thereby cleaning the gas separation membrane to ensure the gas separation membrane's separation effect on nitrogen and hydrogen. In conjunction with a filter screen, solid impurities can be recovered. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the internal structure of the recovery tank and the rotating rod of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the recovery tank of the present utility model;

[0015] Figure 3 This is a schematic diagram of the internal structure of the rotating rod and the driving motor of the utility model;

[0016] Figure 4 This is a schematic diagram of the external structure of the sealing block and dust collecting frame of the utility model;

[0017] Figure 5 This is a schematic diagram of the internal disassembly structure of the dust collecting frame of the present invention.

[0018] In the picture:

[0019] 1. Recovery tank; 11. First separation chamber; 12. Second separation chamber; 13. First air inlet pipe; 131. First air pump; 14. Second air inlet pipe; 141. Second air pump; 15. First exhaust pipe; 151. First valve; 16. Second exhaust pipe; 161. Second valve; 17. Position-limiting rotation frame; 171. Conduit; 172. Third air outlet pipe; 173. Third air pump; 18. Gas separation membrane; 181. Bracket;

[0020] 2. Rotating rod; 21. Driving motor; 22. Air outlet frame; 23. Through cavity;

[0021] 3. Dust guide chamber; 31. Through hole; 311. Threaded ring; 32. Fourth exhaust pipe; 321. Fourth air pump; 33. Sealing block; 331. Threaded curved groove; 333. Threaded rod; 34. Dust collecting frame; 341. Filter; 342. Limit seat; 343. Threaded sleeve; 344. Driven gear; 345. Active gear ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-5 The utility model provides a technical solution: a waste gas recovery device for a synthetic ammonia system, comprising a recovery tank 1, wherein a second separation chamber 12 and a first separation chamber 11 are respectively provided on the upper and lower sides of the inner cavity of the recovery tank 1, a first air intake pipe 13 and a second exhaust pipe 16 are fixedly installed on the outer end of the first separation chamber 11, a first air pump 131 is fixedly installed on the first air intake pipe 13, a second valve 161 is fixedly installed on the second exhaust pipe 16, a second air intake pipe 14 and a first exhaust pipe 15 are fixedly installed on the outer end of the second separation chamber 12, a second air pump 141 is fixedly installed on the second air intake pipe 14, and a second valve 161 is fixedly installed on the first exhaust pipe 15. The first valve 151, a gas separation membrane 18 is fixedly installed between the second separation chamber 12 and the first separation chamber 11, a limited rotation frame 17 is fixedly installed on the inner side of the second air inlet pipe 14 through a conduit 171, a third air outlet pipe 172 is fixedly installed on the outer end of the limited rotation frame 17, a third air outlet pipe 172 is fixedly installed on the third air pump 173, a rotating rod 2 is rotatably installed in the second separation chamber 12, a driving motor 21 is fixedly installed on the upper end of the outer wall of the recovery tank 1, the output shaft of the driving motor 21 is fixedly connected to the rotating shaft of the rotating rod 2, a through cavity 23 is opened on the periphery of the rotating rod 2, and an air outlet frame 22 is fixedly installed on the lower end of the rotating rod 2.

[0024] Working principle: When in use, the first air pump 131 and the first valve 151 are turned on, and synthetic ammonia can be injected into the recovery tank 1 through the first air inlet pipe 13. The nitrogen in the synthetic ammonia can be blocked by the gas separation membrane 18, thereby achieving the effect of separating the nitrogen and hydrogen in the synthetic ammonia. The nitrogen is blocked in the first separation chamber 11, and the hydrogen enters the second separation chamber 12. The hydrogen can be recovered through the first exhaust pipe 15;

[0025] When nitrogen needs to be recovered, the second air pump 141 and the second valve 161 are opened, and the first valve 151 and the first air pump 131 are closed. External air can be injected into the recovery tank 1 through the second air inlet pipe 14, and the nitrogen retained in the first separation chamber 11 can be discharged to the outside by cooperating with the second exhaust pipe 16, thereby achieving the effect of separating and recovering nitrogen and hydrogen.

[0026] When the gas separation membrane 18 blocks nitrogen in the synthetic ammonia, it can also block impurities such as dust in the synthetic ammonia. When these impurities need to be recovered, the first air pump 131, the first valve 151, and the second valve 161 are closed, the second air pump 141 and the third air pump 173 are opened, and the drive motor 21 is started. The rotating rod 2 cooperates to drive the air outlet frame 22 to rotate on the upper end of the gas separation membrane 18. When the air outlet frame 22 and the gas separation membrane 18 are aligned with each other, air can be injected into the upper end of the gas separation membrane 18, and the dust attached to the lower end of the gas separation membrane 18 can be blown off.

[0027] As a further description of the above technical solution: a bracket 181 fixedly connected to the inner wall of the recovery tank 1 is provided in the gas separation membrane 18, the shape and size of the bracket 181 match the air outlet frame 22, and the upper end of the bracket 181 fits with the air outlet frame 22.

[0028] Specifically, a bracket 181 is provided. When nitrogen and hydrogen are separated through the gas separation membrane 18, the air outlet frame 22 and the bracket 181 are aligned with each other. At this time, hydrogen and nitrogen can be prevented from entering the air outlet frame 22, thereby ensuring the recovery effect of hydrogen.

[0029] When dust on the lower surface of the gas separation membrane 18 needs to be blocked, the air outlet frame 22 and the bracket 181 are offset from each other, and air can be injected into the surface of the gas separation membrane 18 through the air outlet frame 22 .

[0030] As a further description of the above technical solution: a dust guide chamber 3 is provided on the outer wall of the recovery tank 1, a through hole 31 is provided at the lower end of the first separation chamber 11 to communicate with the dust guide chamber 3, a fourth exhaust pipe 32 is fixedly installed on the outer end of the dust guide chamber 3, and a fourth air pump 321 is fixedly installed at the fourth exhaust pipe 32; a sealing block 33 is plugged and installed in the dust guide chamber 3, a threaded curved groove 331 is provided on the outer periphery of the sealing block 33, and a threaded ring 311 threadedly connected to the threaded curved groove 331 is rotatably installed on the outer end of the dust guide chamber 3; the inner end of the sealing block 33 is fixed A threaded rod 333 is installed, a dust collecting frame 34 is provided in the dust guiding chamber 3, a filter screen 341 is fixedly installed in the dust collecting frame 34, a limiting seat 342 is fixedly installed on the inner wall of the dust collecting frame 34, and the limiting seat 342 and the threaded rod 333 are plugged into each other; a threaded sleeve 343 is rotatably installed on the outer end of the limiting seat 342, and the threaded sleeve 343 is threadedly connected to the threaded rod 333, and a driven gear 344 is fixedly installed on the periphery of the threaded sleeve 343, and an active gear ring 345 meshing with the driven gear 344 is rotatably installed on the outer end of the dust collecting frame 34.

[0031] Specifically, when the driving motor 21, the second air pump 141, and the third air pump 173 are turned on to blow the dust off the lower surface of the gas separation membrane 18, the fourth air pump 321 is turned on to guide the dust into the dust guide chamber 3. The dust in the air can be blocked by the filter 341, thereby achieving the effect of blocking the dust.

[0032] When the filter screen 341 needs to be installed, the plug connection between the limit seat 342 and the threaded rod 333 is used, and when the threaded sleeve 343 and the threaded rod 333 are in contact with each other, the meshing connection between the active gear ring 345 and the driven gear 344 can drive each threaded sleeve 343 to rotate, and the threaded connection between it and the threaded rod 333 can drive the dust collection frame 34 to move, and multiple dust collection frames 34 can be installed on one side of the sealing block 33, and then the sealing block 33 is plugged in with the dust guide chamber 3. Connect, install the dust collecting frame 34 and the sealing block 33 into the dust guiding chamber 3, when the threaded ring 311 contacts the sealing block 33, the threaded ring 311 is rotated, and the threaded connection between it and the threaded curved groove 331 can drive the sealing block 33 to move, thereby achieving the effect of positioning the sealing block 33 and the dust collecting frame 34, and making the through hole 31 between the sealing block 33 and the dust collecting frame 34, completing the installation of the filter 341, conversely, the filter 341 can be disassembled, thereby facilitating the recovery of dust.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste gas recovery device for a synthetic ammonia system, comprising a recovery tank (1), characterized in that: The recovery tank (1) has a second separation chamber (12) and a first separation chamber (11) on the upper and lower sides of its inner cavity, a first air intake pipe (13) and a second exhaust pipe (16) fixedly mounted on the outer end of the first separation chamber (11), a first air pump (131) fixedly mounted on the first air intake pipe (13), a second valve (161) fixedly mounted on the second exhaust pipe (16), a second air intake pipe (14) and a first exhaust pipe (15) fixedly mounted on the outer end of the second separation chamber (12), a second air pump (141) fixedly mounted on the second air intake pipe (14), a first valve (151) fixedly mounted on the first exhaust pipe (15), and a second air intake pipe (14) and a first exhaust pipe (15) fixedly mounted on the outer end of the second separation chamber (12). A gas separation membrane (18) is fixedly installed between the separation chambers (11); a limited rotation frame (17) is fixedly installed on the inner side of the second air inlet pipe (14) through a guide tube (171); a third air outlet pipe (172) is fixedly installed on the outer end of the limited rotation frame (17); a third air pump (173) is fixedly installed on the third air outlet pipe (172); a rotating rod (2) is rotatably installed in the second separation chamber (12); a driving motor (21) is fixedly installed on the upper end of the outer wall of the recovery tank (1); the output shaft of the driving motor (21) is fixedly connected to the rotating shaft of the rotating rod (2); a through cavity (23) is opened on the periphery of the rotating rod (2); and an air outlet frame (22) is fixedly installed on the lower end of the rotating rod (2).

2. The waste gas recovery device for a synthetic ammonia system according to claim 1, characterized in that: The gas separation membrane (18) is provided with a bracket (181) fixedly connected to the inner wall of the recovery tank (1); the shape and size of the bracket (181) match the air outlet frame (22), and the upper end of the bracket (181) is in contact with the air outlet frame (22).

3. The waste gas recovery device for a synthetic ammonia system according to claim 1, characterized in that: The outer wall of the recovery tank (1) is provided with a dust guide chamber (3); the lower end of the first separation chamber (11) is provided with a through hole (31) that is in communication with the dust guide chamber (3); a fourth exhaust pipe (32) is fixedly installed at the outer end of the dust guide chamber (3); and a fourth air pump (321) is fixedly installed at the fourth exhaust pipe (32).

4. The waste gas recovery device for a synthetic ammonia system according to claim 3, characterized in that: A sealing block (33) is inserted and installed in the dust guide chamber (3), a threaded curved groove (331) is provided on the periphery of the sealing block (33), and a threaded ring (311) threadedly connected to the threaded curved groove (331) is rotatably installed on the outer end of the dust guide chamber (3).

5. The waste gas recovery device for a synthetic ammonia system according to claim 4, characterized in that: A threaded rod (333) is fixedly mounted on the inner end of the sealing block (33); a dust collecting frame (34) is provided in the dust guiding chamber (3); a filter screen (341) is fixedly mounted in the dust collecting frame (34); a limiting seat (342) is fixedly mounted on the inner wall of the dust collecting frame (34); the limiting seat (342) and the threaded rod (333) are plugged into each other.

6. The waste gas recovery device for a synthetic ammonia system according to claim 5, characterized in that: A threaded sleeve (343) is rotatably mounted on the outer end of the limiting seat (342), the threaded sleeve (343) is threadedly connected to the threaded rod (333), a driven gear (344) is fixedly mounted on the periphery of the threaded sleeve (343), and a driving gear ring (345) meshingly connected to the driven gear (344) is rotatably mounted on the outer end of the dust collecting frame (34).

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