CN215048697U - Device for recovering nitrogen and hydrogen in synthetic ammonia purge gas - Google Patents
Device for recovering nitrogen and hydrogen in synthetic ammonia purge gas Download PDFInfo
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- CN215048697U CN215048697U CN202121022401.9U CN202121022401U CN215048697U CN 215048697 U CN215048697 U CN 215048697U CN 202121022401 U CN202121022401 U CN 202121022401U CN 215048697 U CN215048697 U CN 215048697U
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Abstract
The utility model discloses a belong to chemical industry technical field, specifically be a device for retrieving nitrogen gas and hydrogen in synthetic ammonia purge gas, its technical scheme is: the device comprises an ammonia gas recovery tower, a first hydration separation device, a second hydration separation device and a check valve, wherein the top of the ammonia gas recovery tower is fixedly connected with the first hydration separation device through a guide pipe, and the second hydration separation device is fixedly connected with the second hydration separation device through a guide pipe; hydration separator one includes reation kettle one, an outer wall fixed connection condenser pipe one of reation kettle, the beneficial effects of the utility model are that: the raw material gas consumption of unit synthetic ammonia is reduced, the production capacity of the device is improved, the emission of exhausted gas is reduced, the economic benefit is improved, meanwhile, the stirrer and the stirring rod are arranged, the hydration reaction speed of methane and argon in the first reaction kettle is accelerated, and the piston is arranged in the second reaction kettle to compress the gas, so that the hydration reaction is more thorough, and the speed is higher.
Description
Technical Field
The utility model relates to the technical field of chemical industry, concretely relates to a device for retrieving nitrogen gas and hydrogen in synthetic ammonia purge gas.
Background
The gas from the ammonia recovery unit (usually ammonia washing tower, or ammonia recovery tower) of the ammonia synthesis device is washed, after ammonia in the gas is recovered, the gas is used as the synthetic ammonia purge gas to be put into a fuel gas system or a hydrogen recovery system, the pressure of the ammonia synthesis device is generally very high, and the outlet pressure of the synthetic ammonia purge gas at the top of the ammonia recovery tower is usually 5-15 MPa; the synthetic ammonia purge gas contains a certain amount of methane and argon, and also contains hydrogen and nitrogen with higher content, and also contains a certain amount of ammonia, so that the effective components and pressure of the synthetic ammonia purge gas have higher recovery value; if the part of hydrogen and nitrogen can be recovered under high pressure environment, the production capacity of the device can be improved or the load of the hydrogen production unit can be reduced, and the loss of pressure energy can be effectively reduced.
The existing ammonia synthesis device recovers hydrogen and nitrogen in ammonia purge gas, removes methane and argon in the ammonia purge gas through hydration reaction, and realizes hydration reaction conditions through a compressor and a condenser.
Therefore, it is necessary to develop a device for recovering nitrogen and hydrogen from the purge gas of synthetic ammonia.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides a device for retrieving nitrogen gas and hydrogen in synthetic ammonia relaxs gassing, through setting up hydration separator one and hydration separator two, use the agitator to stir in the hydration separator one, set up the piston at hydration separator two, extrude gas, hydration reaction with higher speed improves hydration reaction efficiency, has solved the slow problem of hydration reaction speed of methane and argon gas in the current synthetic ammonia device.
In order to achieve the above object, the present invention provides the following technical solutions:
a device for recovering nitrogen and hydrogen in synthetic ammonia purge gas comprises an ammonia gas recovery tower, a first hydration separation device, a second hydration separation device and a check valve, wherein the top of the ammonia gas recovery tower is fixedly connected with the first hydration separation device through a guide pipe, and the second hydration separation device is fixedly connected with the second hydration separation device through a guide pipe;
the hydration separation device comprises a first reaction kettle, wherein a first condensation pipe is fixedly connected to the outer wall of the first reaction kettle, the outer wall of the first reaction kettle is fixedly connected with a first outer shell, a first solid outlet is formed in the bottom of the first reaction kettle, a first valve is fixedly installed on the first solid outlet, a first servo motor is arranged at the top of the first reaction kettle, a lead screw is fixedly connected to the output end of the first servo motor, the outer wall of the lead screw is in threaded connection with a stirrer, a stirrer connecting ring is integrally formed on the outer wall of the stirrer, a stirrer is sleeved on the outer wall of the stirrer connecting ring, a first gas outlet is formed in the right end of the first reaction kettle, a second valve is fixedly installed on the first gas outlet, a first compressor is arranged above the first servo motor, the output end of the first compressor is communicated with the inner cavity of the first reaction kettle through a guide pipe, and a first gas inlet is formed in the left end of the first reaction kettle;
the second hydration separation device comprises a second reaction kettle, a second shell is arranged on the outer side of the second reaction kettle, a second condensation pipe is arranged between the second reaction kettle and the second shell, a second gas outlet is arranged at the right end of the second reaction kettle, a third valve is fixedly arranged on the second gas outlet, a second solid outlet is arranged at the bottom of the second reaction kettle, a fourth valve is fixedly arranged on the second solid outlet, a second servo motor is arranged at the top of the second reaction kettle, a driving gear is sleeved on the outer wall of the output end of the second servo motor, the driving gear is meshed and connected with a driven gear, a threaded rod is connected with the inner wall of the driven gear in a threaded manner, the bottom of the driven gear is fixedly connected with an inner ring of a bearing, the bottom of the outer ring of the bearing is fixedly connected with the second reaction kettle, the bottom of the threaded rod is fixedly connected with a rectangular ring, a connecting rod is inserted in the inner wall of the rectangular ring, and a piston is fixedly connected with the bottom of the connecting rod, a second compressor is arranged above the second servo motor and is communicated with the inner cavity of the second reaction kettle through a guide pipe, and a second gas inlet is formed in the left end of the second reaction kettle.
Preferably, the first condensation pipe is positioned between the first reaction kettle and the first outer shell.
Preferably, four groups of the connecting rings of the stirring rods are arranged, and the four groups of the connecting rings of the stirring rods are distributed on the circumference of the outer wall of the stirrer at equal intervals.
Preferably, the check valve is fixedly installed on a conduit of the ammonia gas recovery tower connected with the first hydration separation device.
Preferably, the second condensation pipe is fixedly arranged on the outer wall of the second reaction kettle.
Preferably, the outer wall of the piston is connected with the inner wall of the second reaction kettle in a sliding manner.
The utility model has the advantages that:
1. on the basis of the existing synthetic ammonia process, a first hydration separation device and a second hydration separation device are introduced, methane and argon contained in the synthetic ammonia purge gas are enabled to generate hydrate which is removed, so that nitrogen and hydrogen in the purge gas are concentrated, and the concentrated gas containing high-concentration nitrogen and hydrogen is returned to the synthetic ammonia device in a high-pressure state, so that the purpose of recovering the nitrogen and the hydrogen in the synthetic ammonia purge gas is achieved, and the energy consumption of compression is reduced;
2. the device can make the obtained mixture containing high-concentration nitrogen and hydrogen return to the ammonia synthesis device in a high-pressure state, thereby greatly reducing the consumption of compression work, lightening the hydrogen production load of a gas making device, reducing the consumption of raw material gas of unit synthesis ammonia, improving the production capacity of the device, reducing the emission of purge gas and improving the economic benefit;
3. set up agitator and puddler simultaneously, accelerated the hydration reaction speed of methane and argon gas in reation kettle one, set up the piston in reation kettle two and compress gas to make the hydration reaction more thorough, speed is faster.
Drawings
Fig. 1 is a schematic structural diagram provided by the present invention;
fig. 2 is a schematic view of a first hydration separation apparatus of fig. 1 provided by the present invention;
FIG. 3 is a schematic view of a blender provided by the present invention;
fig. 4 is a schematic view of a second hydration separation apparatus shown in fig. 1 according to the present invention.
In the figure: the device comprises an ammonia gas recovery tower 100, a first hydration separation device 200, a second hydration separation device 300, a check valve 400, a first outer shell 201, a first condenser pipe 202, a first gas inlet 203, a first reaction kettle 204, a first solid outlet 205, a first valve 206, a first gas outlet 207, a second valve 208, a first servo motor 209, a first compressor 210, a screw rod 211, a stirrer 212, a stirring rod 213, a stirring rod connecting ring 214, a second outer shell 301, a second condenser pipe 302, a second gas inlet 303, a second reaction kettle 304, a second solid outlet 305, a fourth valve 306, a second gas outlet 307, a third valve 308, a second servo motor 309, a threaded rod 310, a second compressor 311, a driving gear 312, a driven gear 313, a bearing 314, a rectangular ring 315, a piston 316 and a connecting rod.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
Referring to the attached fig. 1-4 of the specification, the device for recovering nitrogen and hydrogen in synthetic ammonia purge gas of the embodiment comprises an ammonia gas recovery tower 100, a first hydration separation device 200, a second hydration separation device 300 and a check valve 400, and is characterized in that: the top of the ammonia gas recovery tower 100 is fixedly connected with the first hydration separation device 200 through a conduit, and the second hydration separation device 300 is fixedly connected with the second hydration separation device 300 through a conduit;
the first hydration separation device 200 comprises a first reaction kettle 204, a first condensation pipe 202 is fixedly connected to the outer wall of the first reaction kettle 204, a first outer shell 201 is fixedly connected to the outer wall of the first reaction kettle 204, a first solid outlet 205 is arranged at the bottom of the first reaction kettle 204, a first valve 206 is fixedly installed on the first solid outlet 205, a first servo motor 209 is arranged at the top of the first reaction kettle 204, a first gas outlet 207 is arranged at the output end of the first servo motor 209, a stirrer 212 is connected to the outer wall of the first screw rod 211 in a threaded manner, a stirrer rod 214 is integrally formed on the outer wall of the stirrer 212, a stirrer rod 213 is sleeved on the outer wall of the stirrer rod connecting ring 214, a first gas outlet 207 is arranged at the right end of the first reaction kettle 204, a second valve 208 is fixedly installed on the first gas outlet 207, a first compressor 210 is arranged above the first servo motor 209, and the output end of the first compressor 210 is communicated with the inner cavity of the first reaction kettle 204 through a conduit, the left end of the first reaction kettle 204 is provided with a first gas inlet 203; the stirrer 212 and the stirring rod 213 are used for not stirring the reaction kettle one 204, accelerating the hydration reaction of methane and argon, and crushing solid substances generated by the hydration reaction so as to discharge the solid substances from the solid substance outlet one 205; the first servo motor 209 is set to be JSF 57-15-30-BF-1000, and the first servo motor 209 is used for driving the screw rod 211 to rotate;
the second hydration separation device 300 comprises a second reaction kettle 304, a second shell 301 is arranged on the outer side of the second reaction kettle 304, a second condensation pipe 302 is arranged between the second reaction kettle 304 and the second shell 301, a second gas outlet 307 is arranged at the right end of the second reaction kettle 304, a third valve 308 is fixedly arranged on the second gas outlet 307, a second solid outlet 305 is arranged at the bottom of the second reaction kettle 304, a fourth valve 306 is fixedly arranged on the second solid outlet 305, a second servo motor 309 is arranged at the top of the second reaction kettle 304, a driving gear 312 is sleeved on the outer wall of the output end of the second servo motor 309, the driving gear 312 is meshed and connected with a driven gear 313, a threaded rod 310 is connected to the inner wall of the driven gear 313 in a threaded manner, the bottom of the driven gear 313 is fixedly connected with an inner ring of a bearing 314, the bottom of an outer ring of the bearing 314 is fixedly connected with the second reaction kettle 304, and a rectangular ring 315 is fixedly connected to the bottom of the threaded rod 310, a connecting rod 317 is inserted into the inner wall of the rectangular ring 315, a piston 316 is fixedly connected to the bottom of the connecting rod 317, a second compressor 311 is arranged above the second servo motor 309, the second compressor 311 is communicated with the inner cavity of the second reaction kettle 304 through a guide pipe, and a second gas inlet 303 is arranged at the left end of the second reaction kettle 304; a second servo motor 309 is provided as JSF 60-15-30-CF-1000, and the second servo motor 309 is operative to drive the threaded rod 310 to rotate, thereby driving the piston 316 to move.
Further, the first condensation pipe 202 is positioned between the first reaction kettle 204 and the first outer shell 201; the first condenser pipe 202 is used for cooling the first reaction kettle 204 to create the condition for the hydration reaction of methane and argon in the first reaction kettle 204.
Further, four sets of the connecting rings 214 are provided, and the four sets of the connecting rings 214 are equidistantly distributed on the circumference of the outer wall of the stirrer 212.
Further, the check valve 400 is fixedly installed on the conduit of the ammonia gas recovery tower 100 connected with the first hydration separation device 200; the check valve 400 functions to prevent gas in the conduit connecting the ammonia gas recovery column 100 and the hydration separation apparatus-200 from flowing back into the ammonia gas recovery column 100.
Further, the second condensation pipe 302 is fixedly installed on the outer wall of the second reaction kettle 304; the second condensation pipe 302 is used for cooling the second reaction kettle 304 and creating the conditions for the hydration reaction of methane and argon in the second reaction kettle 304.
Further, the outer wall of the piston 316 is slidably connected with the inner wall of the second reaction kettle 304; the piston 316 is used for compressing the gas in the second reaction kettle 304 and accelerating the hydration reaction of methane and argon.
The implementation scenario is specifically as follows: when the utility model is used, the mixed gas containing hydrogen, nitrogen, argon and methane released in the ammonia recovery tower 100 enters the first reaction kettle 204, the first condenser pipe 202 cools the first reaction kettle 204, the first compressor 210 compresses the gas in the first reaction kettle 204, the screw 211 is driven by the output end of the first servo motor 209 to rotate from creating the conditions needed by the hydration reaction of methane and argon, the stirrer 212 moves up and down to stir the substances for the hydration reaction of water, the speed of the hydration reaction is accelerated, after the hydration reaction is thoroughly carried out, the second valve 208 on the first gas outlet 207 is opened, the mixed gas is led into the second reaction kettle 304, the fourth valve 306 on the second solid outlet 305 is opened, the solid substances generated by the hydration reaction are discharged, the second condenser pipe 302 cools the second reaction kettle 304, the second compressor 311 compresses the gas in the second reaction kettle 304, creating conditions required by the methane and argon gas hydration reaction in the second reaction kettle 304, starting the second servo motor 309, driving the driving gear 312 to rotate by the output end of the second servo motor 309, driving the driven gear 313 to rotate by the driving gear 312, driving the bearing 314 to rotate by the driven gear 313, simultaneously moving the threaded rod 310 downwards under the rotation of the driven gear 313, driving the piston 316 by the threaded rod 310 to compress gas, so as to accelerate the hydration reaction speed, after the hydration reaction is saturated, communicating the second gas outlet 307 and the ammonia synthesis device through a conduit, opening the third valve 308 on the second gas outlet 307, introducing hydrogen and nitrogen into the ammonia synthesis device from the new gas outlet, and recycling the hydrogen and nitrogen.
The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solutions described above. Therefore, any simple modifications or equivalent replacements made according to the technical solution of the present invention belong to the scope of the claimed invention as far as possible.
Claims (6)
1. An apparatus for recovering nitrogen and hydrogen in syngas purge gas, comprising an ammonia gas recovery column (100), a first hydration separation apparatus (200), a second hydration separation apparatus (300), and a check valve (400), characterized in that: the top of the ammonia gas recovery tower (100) is fixedly connected with the first hydration separation device (200) through a conduit, and the second hydration separation device (300) is fixedly connected with the second hydration separation device (300) through a conduit;
the first hydration separation device (200) comprises a first reaction kettle (204), a first condensation pipe (202) is fixedly connected to the outer wall of the first reaction kettle (204), a first outer shell (201) is fixedly connected to the outer wall of the first reaction kettle (204), a first solid outlet (205) is arranged at the bottom of the first reaction kettle (204), a first valve (206) is fixedly installed on the first solid outlet (205), a first servo motor (209) is arranged at the top of the first reaction kettle (204), a first lead screw (211) is fixedly connected to the output end of the first servo motor (209), a stirrer (212) is in threaded connection with the outer wall of the lead screw (211), a stirrer rod connecting ring (214) is integrally formed on the outer wall of the stirrer (212), the stirrer rod (213) is sleeved on the outer wall of the stirrer rod connecting ring (214), a first gas outlet (207) is arranged at the right end of the first reaction kettle (204), and a second valve (208) is fixedly installed on the first gas outlet (207), a first compressor (210) is arranged above the first servo motor (209), the output end of the first compressor (210) is communicated with the inner cavity of the first reaction kettle (204) through a guide pipe, and the left end of the first reaction kettle (204) is provided with a first gas inlet (203);
the second hydration separation device (300) comprises a second reaction kettle (304), a second shell (301) is arranged on the outer side of the second reaction kettle (304), a second condensation pipe (302) is arranged between the second reaction kettle (304) and the second shell (301), a second gas outlet (307) is arranged at the right end of the second reaction kettle (304), a third valve (308) is fixedly installed on the second gas outlet (307), a second solid outlet (305) is arranged at the bottom of the second reaction kettle (304), a fourth valve (306) is fixedly installed on the second solid outlet (305), a second servo motor (309) is arranged at the top of the second reaction kettle (304), a driving gear (312) is sleeved on the outer wall of the output end of the second servo motor (309), the driving gear (312) is meshed and connected with a driven gear (313), a threaded rod (310) is connected with the inner wall of the driven gear (313), and the bottom of the driven gear (313) is fixedly connected with an inner ring of a bearing (314), outer ring bottom fixed connection of bearing (314) reation kettle two (304), threaded rod (310) bottom fixed connection rectangle ring (315), rectangle ring (315) inner wall grafting connecting rod (317), connecting rod (317) bottom fixed connection piston (316), servo motor two (309) top is equipped with compressor two (311), compressor two (311) are through the pipe intercommunication reation kettle two (304) inner chamber, reation kettle two (304) left end is equipped with gas inlet two (303).
2. The apparatus for recovering nitrogen and hydrogen from syngas purge gas as claimed in claim 1, wherein: the first condensation pipe (202) is positioned between the first reaction kettle (204) and the first outer shell (201).
3. The apparatus for recovering nitrogen and hydrogen from syngas purge gas as claimed in claim 1, wherein: four groups of the stirring rod connecting rings (214) are arranged, and the four groups of the stirring rod connecting rings (214) are distributed on the circumference of the outer wall of the stirrer (212) at equal intervals.
4. The apparatus for recovering nitrogen and hydrogen from syngas purge gas as claimed in claim 1, wherein: the ammonia gas recovery tower (100) is connected with a conduit of the first hydration separation device (200) and is fixedly provided with the check valve (400).
5. The apparatus for recovering nitrogen and hydrogen from syngas purge gas as claimed in claim 1, wherein: and the second condensation pipe (302) is fixedly arranged on the outer wall of the second reaction kettle (304).
6. The apparatus for recovering nitrogen and hydrogen from syngas purge gas as claimed in claim 1, wherein: the outer wall of the piston (316) is connected with the inner wall of the second reaction kettle (304) in a sliding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121022401.9U CN215048697U (en) | 2021-05-13 | 2021-05-13 | Device for recovering nitrogen and hydrogen in synthetic ammonia purge gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121022401.9U CN215048697U (en) | 2021-05-13 | 2021-05-13 | Device for recovering nitrogen and hydrogen in synthetic ammonia purge gas |
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| CN215048697U true CN215048697U (en) | 2021-12-07 |
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| CN202121022401.9U Active CN215048697U (en) | 2021-05-13 | 2021-05-13 | Device for recovering nitrogen and hydrogen in synthetic ammonia purge gas |
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- 2021-05-13 CN CN202121022401.9U patent/CN215048697U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A device for recovering nitrogen and hydrogen in synthetic ammonia purge gas Effective date of registration: 20220420 Granted publication date: 20211207 Pledgee: Xi'an Science and Technology Financial Service Center Co.,Ltd. Pledgor: XI'AN ULTRA-FILTRATION ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Registration number: Y2022610000167 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |