CN217016559U - Sodium amide synthesis system - Google Patents
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- CN217016559U CN217016559U CN202220376049.7U CN202220376049U CN217016559U CN 217016559 U CN217016559 U CN 217016559U CN 202220376049 U CN202220376049 U CN 202220376049U CN 217016559 U CN217016559 U CN 217016559U
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Abstract
The present application provides a sodium amide synthesis system, comprising: the device comprises a sodium-ammonia synthesis device, a liquid sodium storage tank and an ammonia storage tank, and further comprises an alkaline hydrolysis device, a recovered ammonia filter and a first recovered ammonia storage tank. Connecting a first recovered ammonia storage tank with a sodium ammonia synthesis device; the sodium-ammonia synthesis device is connected with an ammonia storage tank; the first recovered ammonia storage tank is connected with the ammonia storage tank; therefore, a system for stabilizing the ammonia gas pressure in the sodium ammonia synthesis device is formed, the pressure fluctuation range of the ammonia gas is reduced, the operation stability of the synthetic amino sodium reaction device is improved, the frequency of dangerous occurrence caused by large ammonia gas supply pressure fluctuation in the reaction is reduced, and the stable operation of the system is favorably ensured. And the system of the application can purify and recycle the ammonia gas generated by the hydrolysis of the anilinoacetonitrile, so that the system of the application also has the characteristics of saving resources and reducing the production cost.
Description
Technical Field
The application relates to a sodium amide synthesis technology, in particular to a sodium amide synthesis system.
Background
The sodium amide is a compound with a molecular formula of NaNH2Olive green crystalline material, melting point 210 ℃. For the production of sodium cyanide, reducing agents for organic synthesis, dehydrating agents, azides, and the like. The sodium amide is an important condensing agent in the synthesis process of dye indigo, and the indigo is obtained by hydrolyzing anilinoacetonitrile and then condensing the hydrolyzed product by using the sodium amide as the condensing agent. The prior methods for preparing the sodium amide generally comprise a high-temperature method and a low-temperature method.
High temperature method: the ammonia gas is prepared from dried and deoxidized ammonia through sodium metal at 250-360 ℃, and the products are hydrogen and sodium amide.
Low temperature method: adding metallic sodium into a liquid ammonia solution below 33 ℃ below zero, using ferric trichloride as a catalyst, and evaporating the liquid ammonia as a solvent after the reaction is finished to obtain a white solid product, namely sodium amide.
Because of the industrial limitations of the low temperature process, the high temperature process is often used in industry to synthesize sodium amide, i.e. pure ammonia which is dried and deoxygenated is introduced into liquid sodium for reaction. However, in the process of using the high temperature method, the pressure fluctuation of the ammonia gas supplied to the ammonia sodium kettle is large and the pressure of the ammonia gas is unstable due to the difficulty in accurately controlling the supply of the ammonia gas, which brings potential safety hazards to the production of the sodium amide and influences the product quality of the sodium amide.
SUMMERY OF THE UTILITY MODEL
The application provides a sodium amide synthesis system, which is used for solving the problems of potential safety hazards and poor quality of sodium amide products caused by unstable ammonia gas pressure in the sodium amide synthesis process.
The application provides a sodium amide synthesis system, which comprises a sodium ammonia synthesis device, a liquid sodium storage tank, an ammonia storage tank, an alkaline hydrolysis device, a recovered ammonia filter and a first recovered ammonia storage tank; a recovered ammonia filter and a first recovered ammonia storage tank are sequentially connected in series between the alkaline hydrolysis device and the sodium ammonia synthesis device along the ammonia gas transmission direction; the sodium-ammonia synthesis device is also connected with a liquid sodium storage tank, and the liquid sodium storage tank is used for supplying liquid sodium to the sodium-ammonia synthesis device;
the sodium ammonia synthesis device is also connected with an ammonia storage tank, the ammonia storage tank is used for supplying pure ammonia to the sodium ammonia synthesis device, and a fourth valve is arranged on a pipeline between the sodium ammonia synthesis device and the ammonia storage tank;
the first recovered ammonia storage tank is also connected with the ammonia storage tank and used for balancing the pressure of ammonia in the ammonia storage tank, and a first valve is arranged on a pipeline between the first recovered ammonia storage tank and the ammonia storage tank; a third valve is also arranged on the pipeline between the sodium-ammonia synthesis device and the first recovered ammonia storage tank.
Optionally, the system of this application still includes the second and retrieves the ammonia storage tank, and the second is retrieved the ammonia storage tank and is set up between retrieving ammonia filter and the first storage tank of retrieving the ammonia, and the second is retrieved the ammonia storage tank and still is connected with sodium ammonia synthesizer, and the second is retrieved the ammonia storage tank and is used for balancing the ammonia pressure among the sodium ammonia synthesizer, and still is provided with the second valve on the pipeline between second recovery ammonia storage tank and the sodium ammonia synthesizer.
Optionally, the system of the present application further includes a sodium amide cooling device and a sodium amide crushing device, and the sodium amide cooling device is connected between the sodium ammonia synthesis device and the sodium amide crushing device.
Optionally, the recovered ammonia filter comprises a recovered ammonia filter body, a plurality of grid plates, a filter screen, a first filler layer, a second filler layer, a feed opening, an air inlet and an air outlet;
the feed opening is arranged at the bottom of the recovered ammonia filter body, the gas outlet is arranged at the top of the recovered ammonia filter body, and the gas inlet is arranged at one side of the recovered ammonia filter body and is close to the feed opening; the filter screen is arranged in the recovered ammonia filter body and close to the top, and the grid plates are arranged in the recovered ammonia filter body and positioned between the air inlet and the filter screen; a first packing layer and a second packing layer are sequentially stacked on the filter screen close to the top of the ammonia recovery filter body.
Optionally, one end of each grid plate is a fixed end, and the other end of each grid plate is a free end; the fixed ends of the grid plates are detachably fixed on the inner wall of the ammonia recovery filter body, and the fixed ends of the grid plates are higher than the free ends.
Optionally, the fillers of the first filler layer and the second filler layer are soda lime particles, and the particle size of the filler of the first filler layer is larger than that of the filler of the second filler layer.
Optionally, the sodium amide crushing device comprises: the sodium amide crushing device comprises an outer body, an inner container, a plurality of reamers, a discharge port and a feeding port; the discharging port is arranged at the center of the bottom of the outer body of the sodium amide crushing device, and the feeding port is arranged at the center of the top of the outer body of the sodium amide crushing device; the inner container is arranged at the central position inside the outer body of the sodium amide smashing device, and the plurality of reamers are all arranged in the inner container.
Optionally, the inner wall of the inner container is a porous screen for sieving and leaking the pulverized sodium amide.
Optionally, the first valve is a stop valve, a gate valve, a ball valve or a butterfly valve; the second valve, the third valve and the fourth valve are all one-way valves and are all used for forbidding gas to flow out of the sodium-ammonia synthesis device.
Optionally, the sodium ammonia synthesis unit comprises a multistage countercurrent synthesis reactor consisting of a plurality of sodium ammonia synthesis reactors connected in series in sequence; the multistage countercurrent synthesis reactor adopts a gas-liquid countercurrent mode to mix materials, and the number of the sodium-ammonia synthesis reactors is at least 3.
The sodium amide synthesis system provided by the application is characterized in that a first recovered ammonia storage tank and a second recovered ammonia storage tank are connected; the first ammonia recovery storage tank is connected with the sodium ammonia synthesis device; the sodium-ammonia synthesis device is connected with an ammonia storage tank; the second recovered ammonia storage tank is connected with the sodium ammonia synthesis device; therefore, a system for stabilizing the pressure of the ammonia gas in the sodium ammonia synthesis device is formed, the pressure fluctuation range of the ammonia gas is reduced, the operation stability of the synthesis ammonia sodium reaction device is improved, the frequency of dangerous occurrence caused by large pressure fluctuation of ammonia gas supply in the reaction is reduced, the stable operation of the system is favorably ensured, and the product quality of the sodium amide is improved. And the system of the application can purify and recycle the ammonia gas generated by the hydrolysis of the anilinoacetonitrile, so that the system of the application also has the characteristics of saving resources and reducing the production cost.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a sodium amide synthesis system provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of a sodium amide synthesis system provided in another embodiment of the present application;
FIG. 3 is a schematic diagram of a sodium amide synthesis system provided in another embodiment of the present application;
FIG. 4 is a schematic structural diagram of a recycled ammonia filter according to an embodiment of the present disclosure;
fig. 5 is a schematic structural view of a sodium amide pulverizing apparatus according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a sodium ammonia synthesis apparatus according to an embodiment of the present application.
Description of reference numerals:
1. an alkaline hydrolysis device;
2. an ammonia recovery filter;
201. recovering the ammonia filter body;
202. a grid plate;
203. a filter screen;
204. a first filler layer;
205. a second packing layer;
206. a feed opening;
207. an air inlet;
208. an air outlet;
3. a second recovered ammonia storage tank;
4. a first recovered ammonia storage tank;
5. a sodium ammonia synthesis unit;
501. a first sodium ammonia synthesis reactor;
502. a second sodium ammonia synthesis reactor;
503. a third sodium-tertiary ammonia synthesis reactor;
6. an ammonia gas storage tank;
7. a sodium amide cooling device;
8. a sodium amide crushing device;
801. an outer body of the sodium amide crushing device;
802. an inner container;
803. a reamer;
804. a discharge port;
805. a feeding port;
9. a first valve;
10. a second valve;
11. a third valve;
12. a fourth valve;
13. and (5) a liquid sodium storage tank.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present application, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1, the present application provides a sodium amide synthesis system, which includes a sodium ammonia synthesis apparatus 5, a liquid sodium storage tank 13, an ammonia gas storage tank 6, an alkaline hydrolysis apparatus 1, a recovered ammonia filter 2, and a first recovered ammonia storage tank 4; a recovered ammonia filter 2 and a first recovered ammonia storage tank 4 are sequentially connected in series between the alkaline hydrolysis device 1 and the sodium ammonia synthesis device 5 along the ammonia gas transmission direction;
the sodium-ammonia synthesis device 5 is also connected with a liquid sodium storage tank 13, and the liquid sodium storage tank 13 is used for supplying liquid sodium to the sodium-ammonia synthesis device 5;
the sodium ammonia synthesis device 5 is also connected with an ammonia gas storage tank 6, the ammonia gas storage tank 6 is used for supplying pure ammonia gas to the sodium ammonia synthesis device 5, and a fourth valve 12 is arranged on a pipeline between the sodium ammonia synthesis device 5 and the ammonia gas storage tank 6;
the first ammonia recovery storage tank 4 is also connected with the ammonia storage tank 6 and used for balancing the pressure of ammonia in the ammonia storage tank 6, and a first valve 9 is also arranged on a pipeline between the first ammonia recovery storage tank 4 and the ammonia storage tank 6; a third valve 11 is also arranged on the pipeline between the sodium-ammonia synthesis device 5 and the first recovered ammonia storage tank 4.
In this application, the hydrolysis reaction of phenylamino acetonitrile and strong base such as sodium hydroxide, potassium hydroxide in alkaline hydrolysis unit 1 produces ammonia and the corresponding phenylamino acetate, and the reaction that takes place is as follows:
C8H8N2+KOH+H2O→C8H8KNO2+NH3。
a large amount of ammonia gas can be generated in the reaction, if the ammonia gas is not recycled, the waste of the ammonia gas can be caused, and the alkaline hydrolysis device 1 is arranged in the system and can provide a certain amount of ammonia gas for the sodium ammonia synthesis device 5.
And a recovered ammonia filter 2 for filtering and purifying the ammonia gas from the alkaline hydrolysis device 1. In the alkaline hydrolysis device 1, the phenylaminoacetonitrile and the potassium hydroxide are hydrolyzed to generate the phenylaminoacetic acid potassium and a large amount of ammonia gas, the generated ammonia gas can be mixed with the phenylaminoacetic acid potassium dust and a small amount of moisture, and the phenylaminoacetic acid potassium dust and the moisture mixed in the ammonia gas are required to be removed for recycling. Set up in this application and retrieve ammonia filter 2 and be used for removing dust, processing such as drying the ammonia for the ammonia drying of output and clean avoids because the ammonia is impure, takes place danger in the follow-up reaction.
The first recovered ammonia tank 4 is a storage device for recovered ammonia gas, temporarily stores the ammonia gas purified by the recovered ammonia filter 2, and also serves as a buffer.
The sodium ammonia synthesizer 5 is a device for synthesizing sodium amide, and the reaction for synthesizing the sodium amide in the application is the reaction synthesis of ammonia and liquid sodium at high temperature (250-360 ℃), and the reaction is as follows:
and sodium amide and hydrogen are generated in the reaction, and the generated hydrogen can be recovered after purification and sold as a product, so that the waste of resources is reduced, and the income of enterprises can be created.
The ammonia gas storage tank 6 stores pure ammonia gas for supplying the pure ammonia gas to the sodium ammonia synthesis device 5, and is a main supply device for synthesizing raw material ammonia gas in the sodium ammonia synthesis device 5.
In this application, the liquid sodium storage tank 13 is a temporary storage device for liquid sodium, and is used for supplying liquid sodium to the sodium-ammonia synthesis device 5 to complete the reaction.
First recovery ammonia storage tank 4 links to each other with ammonia storage tank 6 in this application, supplyes the ammonia in ammonia storage tank 6 when ammonia pressure is not enough in ammonia storage tank 6, makes it stable to the pressure of the output ammonia of sodium ammonia synthesizer 5.
The first ammonia recovery storage tank 4 is also connected with the sodium ammonia synthesis device 5, and the first ammonia recovery storage tank 4 is used for supplementing ammonia gas to the sodium ammonia synthesis device 5 so as to ensure the stability of the ammonia gas pressure in the sodium ammonia synthesis device 5 and avoid danger.
The system is connected with a sodium ammonia synthesis device 5 through a first recovered ammonia storage tank 4; the sodium ammonia synthesizer 5 is connected with an ammonia gas storage tank 6; the first recovered ammonia storage tank 4 is connected with an ammonia storage tank 6; therefore, a system for stabilizing the ammonia pressure in the sodium ammonia synthesis device 5 is formed, the pressure fluctuation range of the ammonia is reduced, for example, the pressure fluctuation value of the ammonia can be controlled within 0.3MPa, the operation stability of the synthesis reaction device for synthesizing the amino sodium is improved, the frequency of dangerous occurrence caused by large ammonia supply pressure fluctuation in the reaction is reduced, and the stable operation of the system is favorably ensured. And the system of the application can purify and recycle the ammonia gas generated by the hydrolysis of the anilinoacetonitrile, so that the system of the application also has the characteristics of saving resources and reducing the production cost.
Optionally, as shown in fig. 2, the system of the present application further includes a second recovered ammonia storage tank 3, the second recovered ammonia storage tank 3 is disposed between the recovered ammonia filter 2 and the first recovered ammonia storage tank 4, the second recovered ammonia storage tank 3 is further connected to the sodium ammonia synthesis device 5, the second recovered ammonia storage tank 3 is used for balancing the pressure of ammonia gas in the sodium ammonia synthesis device 5, and a second valve 10 is further disposed on a pipeline between the second recovered ammonia storage tank 3 and the sodium ammonia synthesis device 5.
In this application, first recovery ammonia storage tank 4 links to each other with second recovery ammonia storage tank 3 for complement ammonia each other and equilibrium pressure, maintain the ammonia pressure of sodium ammonia synthesizer 5, and second recovery ammonia storage tank 3 can also save the ammonia, has promoted the middle storage capacity to the ammonia.
Optionally, as shown in fig. 3, optionally, the system of the present application further includes a sodium amide cooling device 7 and a sodium amide crushing device 8, where the sodium amide cooling device 7 is connected between the sodium ammonia synthesis device 5 and the sodium amide crushing device 8.
In the application, the sodium amide cooling device 7 is arranged for cooling sodium amide, the reaction for synthesizing the sodium amide needs to be carried out at a high temperature of 250-360 ℃, the sodium amide obtained by synthesis is liquid at the reaction temperature (the melting point of the sodium amide is 210 ℃), and the sodium amide needs to be collected after being cooled, so that the sodium amide cooling device 7 is arranged, the device uses circulating cooling water or heat conduction oil to replace the heat of the sodium amide, the circulating cooling water or the heat conduction oil for cooling the sodium amide cooling device 7 can be used as a heating medium, equipment of other workshop sections in a factory is heated, the loss and waste of heat are avoided, and the production cost of the factory is reduced.
And the sodium amide crushing device 8 is used for crushing the blocky sodium amide cooled by the sodium amide cooling device 7, so that the storage of the finished sodium amide and the use of a subsequent working section are facilitated, the utilization rate of the sodium amide in a corresponding reaction can be improved after the sodium amide is crushed, and the occurrence of danger can be avoided.
Alternatively, as shown in fig. 4, the recovered ammonia filter 2 includes a recovered ammonia filter body 201, a plurality of baffle plates 202, a filter net 203, a first packing layer 204, a second packing layer 205, a feed opening 206, an air inlet 207, and an air outlet 208;
the feed port 206 is arranged at the bottom of the recovered ammonia filter body 201, and the gas outlet 208 is arranged at the top of the recovered ammonia filter body 201; the air inlet 207 is arranged at one side of the ammonia recovery filter body 201 and close to the feed opening 206;
the filter screen 203 is arranged in the recovered ammonia filter body 201 and close to the top; a plurality of louvers 202 are provided inside the recovered ammonia filter body 201 between the air inlet 207 and the filter mesh 203;
a first packing layer 204 and a second packing layer 205 are sequentially stacked on the filter screen 203 near the top of the ammonia recovery filter body 201.
In this application, set up a plurality of grid plates 202 and can adsorb and detach some moisture in some ammoniated gas, and because moisture in the ammoniated gas can wet a plurality of grid plates 202, therefore this grid plate 202 can also detach the dust of the potassium anilinoacetate in the ammoniated gas, reduce the processing pressure of other parts, and when the moisture that condenses on grid plate 202 is enough, the moisture that drips can discharge through feed opening 206 and collect, and retrieve potassium anilinoacetate and ammonia among them, therefore set up grid plate 202 and also have the effect that reduction in production cost, resources are saved.
The first filler layer 204 and the second filler layer 205 are used for removing moisture in the ammonia gas and further drying the ammonia gas to reduce the water content of the ammonia gas, so that the ammonia gas is dried to reach the recovery standard.
Optionally, one end of the plurality of grid plates 202 is a fixed end, and the other end is a free end; the fixed ends of the plurality of baffle plates 202 are detachably fixed on the inner wall of the recovered ammonia filter body 201, and the fixed ends of the plurality of baffle plates 202 are higher than the free ends.
In this application, the plurality of grid plates 202 are arranged in the above-mentioned manner, so that the contact area between the plurality of grid plates 202 and the gas can be increased, and the fixed ends of the plurality of grid plates 202 are higher than the free ends, so that the moisture condensed on the plurality of grid plates 202 can be dropped conveniently.
Optionally, the fillers of the first filler layer 204 and the second filler layer 205 are soda lime particles, and the particle size of the filler of the first filler layer 204 is larger than that of the filler of the second filler layer 205.
In this application, the filler particle diameter of first filler layer 204 is greater than the particle diameter that second filler layer 205 packed, does benefit to gaseous passing through, avoids because long-term operation, and the filler space diminishes and takes place the not smooth problem of gas flow, and the fine particle diameter of second filler layer is favorable to the moisture in the ammonia to be thoroughly detached. The alkaline lime is used for drying the ammonia gas, so that the effect of removing water is achieved, the adsorption of the filler to the ammonia gas can be reduced, and meanwhile, acid gas impurities mixed in the ammonia gas can be removed, so that the ammonia gas is dried and clean.
Alternatively, as shown in fig. 5, the sodium amide pulverizing apparatus 8 includes: the sodium amide crushing device comprises an outer body 801, an inner container 802, a plurality of reamers 803, a discharge hole 804 and a feed hole 805;
the discharge hole 804 is arranged at the center of the bottom of the outer body 801 of the sodium amide crushing device; the feeding port 805 is arranged at the center of the top of the outer body 801 of the sodium amide crushing device;
the inner container 802 is arranged at the central position inside the outer body 801 of the sodium amide crushing device, and a plurality of reamers 803 are all arranged in the inner container 802.
In this application, set up sodium amide reducing mechanism 8, set up the reamer and be used for smashing cubic sodium amide, be convenient for to its partial shipment and save, also be favorable to improving the utilization ratio of sodium amide in the reaction.
Optionally, the inner wall of the inner container 802 is a porous screen for sieving and draining the pulverized sodium amide.
In this application, the liner wall of the liner 802 is a porous screen, when lumpy sodium amide enters the liner 802 from the feeding port 805, the lumpy sodium amide is crushed by the plurality of reamers 803, particles smaller than the screen fall from the liner, and particles larger than the meshes of the screen continue to be crushed by the reamers 803 until reaching a proper particle size capable of falling from the meshes of the screen.
Optionally, the first valve 9 is a stop valve, gate valve, ball valve or butterfly valve;
the second valve 10, the third valve 11, and the fourth valve 12 are all one-way valves, and are all used to inhibit the flow of gas from the sodium ammonia synthesis unit 5.
In this application, first valve 9 is stop valve, gate valve, ball valve or butterfly valve, mainly plays the effect of the 6 gas circulation of the first ammonia storage tank of retrieving of control 4 and ammonia storage tank.
The second valve 10, the third valve 11 and the fourth valve 12 are all one-way valves for prohibiting gas from flowing out of the sodium-ammonia synthesis device 5, so that when the pressure in the sodium-ammonia synthesis device 5 is reduced, the first ammonia recovery storage tank 4, the second ammonia recovery storage tank 3 and the ammonia gas storage tank 6 can be used for supplying sufficient ammonia gas to the sodium-ammonia synthesis device 5 in real time, the stability of the pressure of the ammonia gas in the sodium-ammonia synthesis device 5 can be ensured, the phenomenon that the ammonia gas in the sodium-ammonia synthesis device 5 leaks out of the first ammonia recovery storage tank 4, the second ammonia recovery storage tank 3 and the ammonia gas storage tank 6 through ammonia gas pipelines is avoided, and pure ammonia gas is polluted.
As shown in fig. 6, alternatively, the sodium ammonia synthesis unit 5 comprises a multistage countercurrent synthesis reactor consisting of a plurality of sodium ammonia synthesis reactors connected in series in sequence; the multistage countercurrent synthesis reactor adopts a gas-liquid countercurrent mode to mix materials; the number of the sodium-ammonia synthesis reactors is at least 3.
The sodium ammonia plant 5 of the present application comprises a plurality of sodium ammonia synthesis reactors, such as the first sodium ammonia synthesis reactor 501, the second sodium ammonia synthesis reactor 502, and the third sodium ammonia synthesis reactor 503 of fig. 5, connected in series. By adopting a multistage countercurrent fully-mixed contact type reactor, in actual use, liquid sodium flows in from the third sodium ammonia synthesis reactor 503, and after the liquid sodium contacts and reacts with ammonia gas in the third sodium ammonia synthesis reactor 503, the liquid sodium and the generated sodium amide flow in the second sodium ammonia synthesis reactor 502 for re-reaction, finally flow in the first sodium ammonia synthesis reactor 501 for re-reaction, and the sodium amide obtained by final reaction is output from the first sodium ammonia synthesis reactor 501 and enters the next step of treatment. The ammonia gas in the reaction enters the first sodium ammonia synthesis reactor 501 for reaction, then enters the second sodium ammonia synthesis reactor 502, finally enters the third sodium ammonia synthesis reactor 503 for reaction, and is output from the third sodium ammonia synthesis reactor 503 after the final reaction. In the present application, the nature of the sodium ammonia synthesis reactor is a sodium ammonia kettle. The method for synthesizing the sodium amide by adopting the multistage countercurrent contact mode can continuously synthesize a target product, and can improve the utilization rate of liquid sodium and ammonia gas in the reaction, thereby reducing waste and improving the purity of the product sodium amide.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A sodium amide synthesis system comprises a sodium-ammonia synthesis device (5), a liquid sodium storage tank (13) and an ammonia gas storage tank (6), and is characterized by also comprising an alkaline hydrolysis device (1), a recovered ammonia filter (2) and a first recovered ammonia storage tank (4);
a recovered ammonia filter (2) and a first recovered ammonia storage tank (4) are sequentially connected in series between the alkaline hydrolysis device (1) and the sodium-ammonia synthesis device (5) along the ammonia gas transmission direction;
the sodium ammonia synthesis device (5) is also connected with a liquid sodium storage tank (13), and the liquid sodium storage tank (13) is used for supplying liquid sodium to the sodium ammonia synthesis device (5);
the sodium ammonia synthesis device (5) is also connected with an ammonia gas storage tank (6), the ammonia gas storage tank (6) is used for supplying pure ammonia gas to the sodium ammonia synthesis device (5), and a fourth valve (12) is further arranged on a pipeline between the sodium ammonia synthesis device (5) and the ammonia gas storage tank (6);
the first recovered ammonia storage tank (4) is also connected with the ammonia storage tank (6) and used for balancing the pressure of ammonia in the ammonia storage tank (6), and a first valve (9) is arranged on a pipeline between the first recovered ammonia storage tank (4) and the ammonia storage tank (6);
and a third valve (11) is also arranged on a pipeline between the sodium-ammonia synthesis device (5) and the first recovered ammonia storage tank (4).
2. The sodium amide synthesis system according to claim 1, characterized in that the system further comprises a second recovered ammonia storage tank (3), the second recovered ammonia storage tank (3) is arranged between the recovered ammonia filter (2) and the first recovered ammonia storage tank (4), the second recovered ammonia storage tank (3) is further connected with the sodium ammonia synthesis device (5), the second recovered ammonia storage tank (3) is used for balancing the pressure of ammonia gas in the sodium ammonia synthesis device (5), and a second valve (10) is further arranged on a pipeline between the second recovered ammonia storage tank (3) and the sodium ammonia synthesis device (5).
3. Sodium amide synthesis system according to claim 2, characterized in that it further comprises a sodium amide cooling device (7) and a sodium amide crushing device (8), said sodium amide cooling device (7) being connected between said sodium ammonia synthesis device (5) and sodium amide crushing device (8).
4. The sodium amide synthesis system according to claim 1, wherein the recovered ammonia filter (2) comprises a recovered ammonia filter body (201), a plurality of grid plates (202), a filter screen (203), a first packing layer (204), a second packing layer (205), a feed opening (206), an air inlet (207) and an air outlet (208);
the feed opening (206) is arranged at the bottom of the ammonia recovery filter body (201), the air outlet (208) is arranged at the top of the ammonia recovery filter body (201), and the air inlet (207) is arranged at one side of the ammonia recovery filter body (201) and is close to the feed opening (206);
the filter screen (203) is arranged in the recovered ammonia filter body (201) and close to the top, and the grid plates (202) are arranged in the recovered ammonia filter body (201) and located between the air inlet (207) and the filter screen (203);
a first packing layer (204) and a second packing layer (205) are sequentially stacked on the filter screen (203) close to the top of the ammonia recovery filter body (201).
5. The sodium amide synthesis system according to claim 4, wherein one end of the plurality of grid plates (202) is a fixed end and the other end is a free end;
the fixed ends of the grid plates (202) are detachably fixed on the inner wall of the ammonia recovery filter body (201), and the fixed ends of the grid plates (202) are higher than the free ends.
6. The sodium amide synthesis system according to claim 4, wherein the packing material of the first packing material layer (204) and the packing material of the second packing material layer (205) are soda lime particles, and the packing material particle size of the first packing material layer (204) is larger than that of the packing material of the second packing material layer (205).
7. Sodium amide synthesis system according to claim 3, characterized in that said sodium amide comminution device (8) comprises: the sodium amide crushing device comprises an outer body (801), an inner container (802), a plurality of reamers (803), a discharge hole (804) and a feeding hole (805);
the discharge hole (804) is formed in the center of the bottom of the sodium amide crushing device outer body (801);
the inner container (802) is arranged at the central position inside the outer body (801) of the sodium amide crushing device, and the feeding port (805) is arranged at the central position of the top of the outer body (801) of the sodium amide crushing device; a plurality of the reamers (803) are all arranged in the inner container (802).
8. The sodium amide synthesis system according to claim 7, wherein the inner wall of the inner container (802) is a porous screen for screening and draining the pulverized sodium amide.
9. The sodium amide synthesis system according to claim 3, wherein the first valve (9) is a stop valve, a gate valve, a ball valve or a butterfly valve;
the second valve (10), the third valve (11) and the fourth valve (12) are all one-way valves and are all used for forbidding gas to flow out of the sodium-ammonia synthesis device (5).
10. A sodium amide synthesis system as claimed in any one of claims 1 to 9, wherein the sodium ammonia synthesis unit (5) comprises a multistage countercurrent synthesis reactor consisting of a plurality of sodium ammonia synthesis reactors connected in series;
the multistage countercurrent synthesis reactor adopts a gas-liquid countercurrent mode to mix materials, and the number of the sodium-ammonia synthesis reactors is at least 3.
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| CN202220376049.7U CN217016559U (en) | 2022-02-23 | 2022-02-23 | Sodium amide synthesis system |
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| CN202220376049.7U CN217016559U (en) | 2022-02-23 | 2022-02-23 | Sodium amide synthesis system |
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