CN219092070U

CN219092070U - Hydrogen recovery device in synthetic ammonia tail gas

Info

Publication number: CN219092070U
Application number: CN202222882325.XU
Authority: CN
Inventors: 常怀春; 苏海涛; 孟德虎; 李玉龙; 谢洪燕
Original assignee: Shandong Hualu Hengsheng Chemical Co Ltd
Current assignee: Shandong Hualu Hengsheng Chemical Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-05-30
Anticipated expiration: 2032-10-31

Abstract

The utility model provides a hydrogen recovery device in synthetic ammonia tail gas, which comprises an ammonia washing tower, wherein an air pump is arranged at the top of the ammonia washing tower, a feeding pipe is arranged at the bottom of one side of the ammonia washing tower, an adjusting motor is arranged at one side of the middle part of the ammonia washing tower, a driving gear is fixedly arranged at the output end of the adjusting motor, the inner wall of the ammonia washing tower is provided with an annular chute, a limiting ring is connected in a rotary mode, blades are arranged at two sides of the limiting ring, tooth grooves are distributed on one end face of the limiting ring, and the driving gear is in meshed connection with the limiting ring.

Description

Hydrogen recovery device in synthetic ammonia tail gas

Technical Field

The utility model belongs to the technical field of hydrogen recovery, and particularly relates to a hydrogen recovery device in synthesis ammonia tail gas.

Background

The ammonia decomposition hydrogen production is a chemical reaction, and is widely applied to the semiconductor industry, the metallurgical industry and other industries and scientific researches requiring protective atmosphere, wherein the 'recovery device of hydrogen in synthesis ammonia gassing disclosed by the application number of CN 202123077764.5' belongs to an increasingly mature technology, the second gas inlet pipe of the purge gas enters an ammonia washing tower, the purge gas uniformly flows to the upper end of the ammonia washing tower after passing through a flow homogenizing plate, and the purge gas stays in the ammonia washing tower for a long time after being guided by a flow guiding plate, so that the purge gas repeatedly reacts in the ammonia washing tower, but the device has the following defects: although the purge gas uniformly flows to the upper end of the ammonia washing tower after passing through the flow homogenizing plate, the residence time of the purge gas in the ammonia washing tower is effectively prolonged, the contact surface of the reaction liquid after flowing from top to bottom is limited, and meanwhile, when the gas is pressurized in the reaction process, the gas pressure environment cannot be controlled, so that certain limitation exists.

Disclosure of Invention

The utility model aims to provide a device for recovering hydrogen in synthesis ammonia tail gas, and aims to solve the problem that the prior art is limited in practical use.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a hydrogen recovery unit in synthetic ammonia tail gas, includes the ammonia wash tower, ammonia wash tower bottom is equipped with the heater, ammonia wash tower top is equipped with the aspiration pump, ammonia wash tower one side bottom is equipped with the inlet pipe, ammonia wash tower middle part one side is equipped with accommodate motor, accommodate motor output runs through ammonia wash tower fixed mounting and has drive gear, annular spout has been seted up to ammonia wash tower inner wall, annular spout internal rotation is connected with the spacing ring, the spacing ring both sides are equipped with the blade, the blade is semi-circular and slope thirty degrees, tooth's socket has been seted up to distribution on one terminal surface of spacing ring, drive gear and spacing ring meshing are connected, ammonia wash tower top is equipped with the feed liquor pipe, feed liquor pipe one end is equipped with the equipartition atomizer.

Further, the air pump is connected with a heating pipe, the other end of the heating pipe is connected with a separation box, and the top of the separation box is provided with a gas pipe.

Further, the separation box inner wall is equipped with the heat preservation, separation box one side articulates there is the case lid, separation box inner wall distributes and is equipped with a plurality of slots, the block is connected with the hydrogen absorption board in the slot.

Further, a booster pump is arranged on the other side of the separation box, and an air pressure detector is arranged on the top of the other side of the separation box.

Further, a sealing rubber ring is arranged on one side of the box cover.

Further, a liquid discharge pipe is connected with the bottom part of the other side of the bottom of the ammonia washing tower, and one end of the liquid discharge pipe is communicated with a waste liquid collecting tank in a sealing way.

Compared with the prior art, the utility model has the beneficial effects that:

1) The limiting ring is driven to rotate in the annular chute by the rotation driving gear of the adjusting motor, and at the moment, the blades rotate and swing to drop the reaction liquid sprayed on the blades, so that the reaction effect of the liquid is improved;

2) The air pressure in the separation box is detected through the air pressure detector, so that air pressure unbalance is avoided, the pressure pump controls air pressure, and the sealing rubber ring is used for placing air to leak from the gap of the box cover.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of an ammonia wash tower according to the present utility model;

FIG. 3 is a schematic view of a stop collar according to the present utility model;

fig. 4 is a schematic diagram of the structure of the separator tank in the present utility model.

In the figure: 1. an ammonia washing tower; 2. an air extracting pump; 3. a feed pipe; 4. adjusting a motor; 5. a drive gear; 6. an annular chute; 7. a limiting ring; 8. a blade; 9. a liquid inlet pipe; 10. uniformly distributing spray nozzles; 11. heating pipes; 12. a separation box; 13. a gas pipe; 14. a heat preservation layer; 15. a case cover; 16. a slot; 17. a hydrogen absorbing plate; 18. a pressurizing pump; 19. an air pressure detector; 20. sealing rubber rings; 21. a liquid discharge pipe; 22. a waste liquid collection tank.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides the following technical solutions: the utility model provides a hydrogen recovery unit in synthetic ammonia tail gas, including washing ammonia tower 1, it is equipped with the heater to wash ammonia tower 1 bottom, it is equipped with aspiration pump 2 to wash ammonia tower 1 top, it is equipped with inlet pipe 3 to wash ammonia tower 1 one side bottom, it is equipped with accommodate motor 4 to wash ammonia tower 1 middle part one side, accommodate motor 4's output runs through the lateral wall of washing ammonia tower 1 and fixed mounting has driving gear 5, wash ammonia tower 1 inner wall and seted up annular spout 6, annular spout 6 internal rotation is connected with spacing ring 7, spacing ring 7 both sides are equipped with blade 8, blade 8 is semicircular and to arbitrary slope thirty degrees, the tooth's socket has been seted up to the distribution on one terminal surface of spacing ring 7, driving gear 5 and spacing ring 7 meshing are connected. In this embodiment, two collar-shaped sliding grooves 6, a limiting ring 7 and blades 8 are provided, the two collar-shaped sliding grooves are respectively installed on the upper side and the lower side of the driving gear 5, a liquid inlet pipe 9 is arranged at the top of the ammonia washing tower 1, and uniformly distributed spray nozzles 10 are arranged at one end of the liquid inlet pipe 9.

When the ammonia washing tower is specifically used, reaction gas enters the ammonia washing tower 1 through the feed pipe 3, nickel-based catalyst reaction liquid enters the liquid inlet pipe 9 and is sprayed out from the uniformly distributed spray nozzles 10, the nickel-based catalyst reaction liquid and the reaction gas are subjected to catalytic reaction, meanwhile, the ammonia washing tower 1 heats the nickel-based catalyst reaction liquid to form ammonia-hydrogen mixed gas after reaction, when the spray nozzles 10 spray the nickel-based catalyst reaction liquid, the regulating motor 4 rotates to drive the gear 5 to drive the limiting ring 7 to rotate in the annular chute 6, the blades 8 are rotated to swing at the moment, the nickel-based catalyst reaction liquid dropped on the blades 8 is thrown into the air, and the retention time of the nickel-based catalyst reaction liquid and the contact time of the nickel-based catalyst and the reaction gas are improved, so that the reaction effect of the liquid is improved.

The air pump 2 is connected with a heating pipe 11, the other end of the heating pipe 11 is connected with a separation box 12, and the top of the separation box 12 is provided with a gas pipe 13.

When the device is specifically used, the mixed gas is pumped into the heating pipe 11 by the air pump 2, the heating pipe 11 heats and evaporates the water vapor in the mixed gas, the water vapor in the mixed gas is removed through high-temperature evaporation in the heating pipe, the water content of the mixed gas is reduced, then the reacted mixed gas with less water is sent into the separation box 12 to separate the hydrogen, the density of the reaction gas is lower than that of the water vapor, and the water vapor floats on the gas and is pumped out.

The catalytic reaction needs to be catalyzed at a certain temperature to generate ammonia-hydrogen mixed gas, wherein the catalyzed gas is the gas after the first reaction is nearly completed, water vapor in the mixed gas is removed by high-temperature evaporation in a heating pipe, the water content of the mixed gas is reduced, the reacted mixed gas with less water is sent to a separation box, the density of the reacted gas is lower than that of the water vapor, and the water vapor floating on the gas is pumped out.

The inner wall of the separation box 12 is provided with an insulating layer 14, one side of the separation box 12 is hinged with a box cover 15, the inner wall of the separation box 12 is provided with a plurality of slots 16 in a distributed manner, and the slots 16 are internally connected with hydrogen absorption plates 17 in a clamping manner.

When the device is specifically used, the hydrogen absorbing plate 17 is used for recovering hydrogen in the mixed gas, separated ammonia is discharged from the gas pipe 13, and the box cover 15 is opened to replace the hydrogen absorbing plate 17 in the slot 16.

The other side of the separation box 12 is provided with a pressurizing pump 18, and the top of the other side of the separation box 12 is provided with an air pressure detector 19.

In a specific use, the pressurizing pump 18 pressurizes the inside of the separation tank 12, and the air pressure detector 19 detects the air pressure in the separation tank 12, thereby avoiding air pressure unbalance.

A sealing rubber ring 20 is arranged on one side of the case cover 15.

In particular use, the sealing gasket 20 prevents leakage of air from the seam of the lid 15.

The bottom pipe of the ammonia washing tower 1 is connected with a liquid discharge pipe 21, and one end of the liquid discharge pipe 21 is hermetically communicated with a waste liquid collecting tank 22.

In specific use, the reacted liquid remaining after the catalytic reaction enters the waste liquid collection tank 22 through the liquid discharge pipe 21 to be collected.

Working principle: the reaction gas enters the ammonia washing tower 1 through the feed pipe 3, nickel-based catalyst reaction liquid enters the liquid inlet pipe 9 and is sprayed out from the uniformly distributed spray nozzle 10, the nickel-based catalyst reaction liquid and the reaction gas perform catalytic reaction, meanwhile, the ammonia washing tower 1 heats the nickel-based catalyst reaction liquid to form mixed gas, when the liquid is sprayed, the regulating motor 4 rotates to drive the gear 5 to drive the limiting ring 7 to rotate in the annular chute 6, at the moment, the blades 8 rotationally and drop the nickel-based catalyst reaction liquid sprayed on the blades 8, the reaction effect of the liquid is improved, ammonia-hydrogen mixed gas generated after the reaction of the reaction gas and the nickel-based catalyst reaction liquid is pumped into the heating pipe 11 by the air pump 2, the heating pipe 11 heats and evaporates water vapor in the ammonia-hydrogen mixed gas, the ammonia-hydrogen mixed gas enters the separation box 12 to perform hydrogen separation, the hydrogen absorption plate 17 recovers hydrogen in the ammonia-hydrogen mixed gas, the separated ammonia gas is discharged from the gas transmission pipe 13, the box cover 15 is opened to replace the hydrogen absorption plate 17 in the slot 16, the pressurizing pump 18 pressurizes the separation box 12, the air pressure detector 19 detects the air pressure in the separation box 12, the ring 20 is sealed, and the liquid is prevented from leaking from the liquid collecting tank cover 21 through the liquid collecting tank cover 21.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model. The protection scope of the present utility model is subject to what is recited in the claims.

Claims

1. The utility model provides a hydrogen recovery unit in synthetic ammonia tail gas, includes ammonia washing tower (1), its characterized in that, ammonia washing tower (1) bottom is equipped with the heater, ammonia washing tower (1) top is equipped with aspiration pump (2), ammonia washing tower (1) one side bottom is equipped with inlet pipe (3), ammonia washing tower (1) middle part one side is equipped with accommodate motor (4), accommodate motor (4) output runs through ammonia washing tower (1) fixed mounting has driving gear (5), annular spout (6) have been seted up to ammonia washing tower (1) inner wall, annular spout (6) internal rotation is connected with spacing ring (7), spacing ring (7) both sides are equipped with blade (8), blade (8) are semicircular and slope thirty degrees, tooth's socket has been seted up on one terminal surface of spacing ring (7), driving gear (5) are connected with spacing ring (7) meshing, ammonia washing tower (1) top is equipped with feed liquor pipe (9), feed liquor pipe (9) one end is equipped with spray shower nozzle (10), suction pump (2) are equipped with separation case (12) top air pipe (13).

2. The apparatus for recovering hydrogen from synthesis ammonia off-gas according to claim 1, wherein: the air pump (2) is connected with a heating pipe (11), the other end of the heating pipe (11) is connected with a separation box (12), and the top of the separation box (12) is provided with a gas pipe (13).

3. The apparatus for recovering hydrogen from synthesis ammonia off-gas according to claim 1, wherein: the separation box is characterized in that an insulating layer (14) is arranged on the inner wall of the separation box (12), a box cover (15) is hinged to one side of the separation box (12), a plurality of slots (16) are distributed on the inner wall of the separation box (12), and hydrogen absorption plates (17) are connected in the slots (16) in a clamping mode.

4. A hydrogen recovery device in ammonia synthesis tail gas according to claim 3, wherein: the other side of the separation box (12) is provided with a pressurizing pump (18), and the top of the other side of the separation box (12) is provided with an air pressure detector (19).

5. The apparatus for recovering hydrogen from ammonia synthesis tail gas according to claim 4, wherein: one side of the box cover (15) is provided with a sealing rubber ring (20).

6. The apparatus for recovering hydrogen from synthesis ammonia off-gas according to claim 1, wherein: the bottom pipe at the other side of the bottom of the ammonia washing tower (1) is connected with a liquid discharge pipe (21), and one end of the liquid discharge pipe (21) is communicated with a waste liquid collecting tank (22) in a sealing way.