Apparatus for continuous synthesis of ammonium formate based on jet loop reactor

Abstract

The utility model provides a device of continuous synthesis of ammonium formate based on jet loop reactor belongs to ammonium formate synthetic technical field. The device includes pressurized reaction cauldron, carbon monoxide feed pipe and jet loop reactor, carbon monoxide feed pipe communicates with the top air inlet of pressurized reaction cauldron, the jet loop reactor includes circulating pipeline, venturi ejector and the pressurized circulating pump of setting in circulating pipeline, the feed end of circulating pipeline communicates with the bottom discharge port of pressurized reaction cauldron, the discharge end of circulating pipeline communicates with the inlet of venturi ejector, and the outlet of venturi ejector is located the inner chamber upper portion of pressurized reaction cauldron. The utility model utilizes the jet loop reactor to pump out the liquid from the bottom in pressurized reaction cauldron and then sprays from the top through venturi ejector, thereby makes the gaseous carbon monoxide of pressurized reaction cauldron upper portion and other reaction raw materials fully contact, improves the reaction efficiency, and the gaseous carbon monoxide can be continuously supplemented to continuously synthesize ammonium formate.

Description

Technical Field

[0001] This utility model relates to the field of ammonium formate synthesis technology, specifically to an apparatus for the continuous synthesis of ammonium formate based on a jet circulation reactor. Background Technology

[0002] Ammonium formate is an important compound with the molecular formula NH4HCO2, and it has wide applications in agriculture, food, medicine and chemical industries.

[0003] Existing ammonium formate synthesis equipment typically involves a stirred acid-base reaction of formic acid and ammonia in a reactor under atmospheric pressure, using a stirring device to mechanically agitate the raw materials. However, for the new one-step synthesis of ammonium formate based on carbon monoxide, conventional mechanical agitation often fails to ensure thorough mixing of the reactants, thus affecting the efficient synthesis of ammonium formate. Furthermore, most existing ammonium formate synthesis equipment is batch-based, making continuous production difficult and resulting in low production efficiency. Utility Model Content

[0004] In view of the technical problems existing in the background art, this utility model is based on a new one-step process for synthesizing ammonium formate using carbon monoxide. It designs an apparatus for the continuous synthesis of ammonium formate based on a jet circulation reactor. The apparatus uses a jet circulation reactor to pump the liquid material in the pressurized reactor from the bottom and then spray it from the top through a Venturi ejector. This allows the gaseous carbon monoxide in the upper part of the pressurized reactor to fully contact and mix with other reaction raw materials, greatly improving the reaction efficiency. Moreover, the gaseous carbon monoxide in the apparatus can be continuously replenished, realizing the continuous synthesis of ammonium formate.

[0005] This utility model provides an apparatus for the continuous synthesis of ammonium formate based on a jet circulation reactor, including a pressurized reactor, a carbon monoxide feed pipe, and a jet circulation reactor; The carbon monoxide feed pipe is connected to the top air inlet of the pressurized reactor; The jet circulation reactor includes a circulation pipe, a Venturi ejector, and a pressurized circulation pump installed in the circulation pipe; the inlet end of the circulation pipe is connected to the bottom outlet of the pressurized reactor, the outlet end of the circulation pipe is connected to the inlet of the Venturi ejector, and the outlet of the Venturi ejector is located in the upper part of the inner cavity of the pressurized reactor.

[0006] In some embodiments, the apparatus for continuous synthesis of ammonium formate based on a jet circulation reactor further includes a feed pipe and a discharge pipe connected to the circulation pipe.

[0007] In some embodiments, one end of the feed pipe is connected to the reaction raw material supply device, and the other end is connected to the discharge end of the circulation pipe.

[0008] In some embodiments, one end of the discharge pipe is connected to the reaction liquid collection device, and the other end is connected to the circulation pipe.

[0009] In some embodiments, a filter is provided at the connection between the discharge pipe and the circulation pipe to prevent solid catalyst from flowing out through the discharge pipe.

[0010] In some embodiments, the connection between the discharge pipe and the circulation pipe is located between the pressurized circulation pump and the discharge end of the circulation pipe.

[0011] In some embodiments, a first flow valve is provided between the connection point of the discharge pipe and the discharge end of the circulation pipe in the circulation pipe; a second flow valve is provided in the discharge pipe.

[0012] In some embodiments, a third flow valve is provided in the feed pipe.

[0013] In some embodiments, the feed end of the carbon monoxide feed pipe is connected to a carbon monoxide supply device.

[0014] In some embodiments, a pressure monitoring device is provided inside the pressurized reactor.

[0015] The beneficial effects of this utility model include: 1. The apparatus for continuous synthesis of ammonium formate based on a jet circulation reactor provided by this utility model involves placing a carbon monoxide feed pipe at the top of a pressurized reactor and installing a jet circulation reactor. A pressurized circulation pump draws the liquid material inside the pressurized reactor from the bottom and pumps it to a Venturi ejector at the top of the reactor. The negative pressure created by the Venturi ejector draws the carbon monoxide fed through the carbon monoxide feed pipe into the Venturi ejector, ensuring thorough contact between the gaseous carbon monoxide and other reactants before it is injected into the pressurized reactor for efficient reaction. This effectively overcomes the problem of conventional mechanical stirring failing to adequately mix the gaseous and liquid reactants, thus significantly improving the synthesis efficiency of ammonium formate. Furthermore, gaseous carbon monoxide can be continuously replenished during the reaction to ensure continuous reaction within the pressurized reactor.

[0016] 2. The apparatus for continuous synthesis of ammonium formate based on a jet circulation reactor provided by this utility model, by setting up a feed pipe and a discharge pipe, can discharge the reaction liquid through the discharge pipe after the conversion rate reaches the set value, and continue to input reaction raw materials through the feed pipe, further ensuring the continuous synthesis of ammonium formate. On this basis, by setting a filter on the discharge pipe, this utility model can effectively prevent the solid catalyst from being carried away from the pressurized reactor by the reaction liquid, thereby ensuring that the solid catalyst always remains in the pressurized reactor, so as to maintain the catalytic activity of the reaction system in the pressurized reactor and further promote the efficient synthesis of ammonium formate.

[0017] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the apparatus for continuous synthesis of ammonium formate based on a jet circulation reactor provided in this embodiment of the present invention.

[0020] Explanation of reference numerals in the attached drawings: 1. Pressurized reactor; 2. Carbon monoxide feed pipe; 21. Valve; 31. Circulation pipe; 32. Venturi ejector; 33. Pressurized circulation pump; 34. First flow valve; 4. Discharge pipe; 41. Filter; 42. Second flow valve; 5. Feed pipe; 51. Third flow valve; 6. Carbon monoxide supply device; 7. Reaction raw material supply device; 8. Reaction liquid collection device. Detailed Implementation

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the invention, are intended to cover non-exclusive inclusion.

[0023] In the description of the embodiments of this utility model, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly defined.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] In the description of this utility model embodiment, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0026] In the description of the embodiments of this utility model, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0027] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0028] To address the technical problems of poor mixing effect and difficulty in achieving continuous production in traditional ammonium formate synthesis devices using mechanical stirring, this invention provides a device for continuous synthesis of ammonium formate based on a jet circulation reactor. By setting up a jet circulation reactor, the liquid material in the pressurized reactor 1 is pumped out from the bottom and then sprayed out from the top through a Venturi ejector 32. Compared with conventional mechanical stirring, this is more conducive to promoting sufficient contact between the gaseous carbon monoxide in the upper part of the pressurized reactor 1 and other reaction raw materials, thereby improving the synthesis efficiency of ammonium formate. Moreover, the gaseous carbon monoxide can be continuously replenished to achieve continuous synthesis of ammonium formate.

[0029] Please refer to Figure 1 This utility model provides an apparatus for the continuous synthesis of ammonium formate based on a jet circulation reactor, including a pressurized reactor 1, a carbon monoxide feed pipe 2, and a jet circulation reactor; Among them, the carbon monoxide feed pipe 2 is connected to the top air inlet of the pressurized reactor 1; The jet circulation reactor includes a circulation pipe 31, a Venturi ejector 32, and a pressurized circulation pump 33 installed in the circulation pipe 31. The feed end of the circulation pipe 31 is connected to the bottom outlet of the pressurized reactor 1, the discharge end of the circulation pipe 31 is connected to the inlet of the Venturi ejector 32, and the outlet of the Venturi ejector 32 is located in the upper part of the inner cavity of the pressurized reactor 1.

[0030] This embodiment of the invention, by placing the carbon monoxide feed pipe 2 at the top of the pressurized reactor 1, enables the formation of a reaction system in the pressurized reactor 1 with a liquid phase at the bottom and a gaseous carbon monoxide phase at the top. Conventional mechanical stirring methods are difficult to efficiently mix the gaseous and liquid phases in the above system. This invention sets up a jet circulation reactor, using a pressurized circulation pump 33 to draw the liquid material inside the pressurized reactor 1 from the bottom and pump it to the Venturi ejector 32 at the top of the reactor. The negative pressure generated by the Venturi ejector 32 draws the carbon monoxide, which is fed into the top of the pressurized reactor 1 through the carbon monoxide feed pipe 2, into the Venturi ejector 32, allowing the gaseous carbon monoxide to fully contact with other reactants and be sprayed into the pressurized reactor 1 in the form of fine droplets for efficient reaction. This effectively overcomes the problem that conventional mechanical stirring is difficult to fully mix the gaseous and liquid reactants, effectively improving the gas-liquid mixing efficiency and promoting the efficient synthesis of ammonium formate.

[0031] Furthermore, in this embodiment of the invention, the feed end of the carbon monoxide feed pipe 2 is connected to the carbon monoxide supply device 6, thus enabling the carbon monoxide supply device 6 to continuously supply the carbon monoxide required for the reaction into the pressurized reactor 1 through the carbon monoxide feed pipe 2, ensuring the continuous progress of the reaction. More preferably, in this embodiment of the invention, a valve 21 is provided in the carbon monoxide feed pipe 2, and a pressure monitoring device is provided inside the pressurized reactor 1. The valve 21 and the pressure monitoring device work together to facilitate the regulation of the carbon monoxide feed rate by adjusting the valve 21, so as to keep the pressure of the reaction system inside the pressurized reactor 1 constant, which is beneficial to maintaining the continuous and stable progress of the reaction.

[0032] Under the action of the jet circulation reactor, the liquid in the pressurized reactor 1 is continuously pumped out from the bottom and then enters from the top, where it is thoroughly mixed with carbon monoxide. Through efficient reaction, ammonium formate is generated. After this cycle continues for a period of time, the conversion rate reaches the set value, and the reaction liquid in the pressurized reactor 1 is discharged through the discharge pipe to the reaction liquid collection device 8 for collection as crude ammonium formate. Based on this, in this embodiment of the invention, the apparatus for continuous synthesis of ammonium formate based on the jet circulation reactor also includes a feed pipe 5 and a discharge pipe 4 connected to the circulation pipe 31. The discharge pipe 4 can be used to discharge the reaction liquid that meets the requirements, and then the feed pipe 5 can be used to input the reaction raw material mixture to be reacted, allowing the synthesis of ammonium formate to continue, thus ensuring a more continuous synthesis process.

[0033] Furthermore, in this embodiment of the invention, one end of the feed pipe 5 is connected to the reaction material supply device 7, and the other end is connected to the outlet end of the circulation pipe 31. With this configuration, the reaction materials provided by the reaction material supply device 7 can be connected to the outlet end of the circulation pipe 31 via the feed pipe 5, and then to the inlet of the Venturi injector 32, so that they can be efficiently mixed with carbon monoxide under the action of the Venturi injector 32, thereby improving reaction efficiency. The reaction material supply device 7 stores other reaction materials required for the synthesis of ammonium formate besides carbon monoxide, such as liquid ammonia and water. These reaction materials are added to the reaction material supply device 7 in the required proportions, and the resulting reaction material mixture is then fed into the pressurized reactor 1 through the feed pipe 5 and the Venturi injector 32. There, ammonium formate is generated through thorough mixing and reaction with carbon monoxide. Furthermore, in some embodiments of this utility model, a stirring mechanism may be provided in the reaction raw material supply device 7 as needed to premix the reaction raw materials; a pumping device and a third flow valve 51 may also be provided in the feed pipe 5 to efficiently transport the reaction raw material mixture in the reaction raw material supply device 7 to the pressurized reactor 1 at the required flow rate.

[0034] Furthermore, in this embodiment of the invention, one end of the discharge pipe 4 is connected to the reaction liquid collection device 8, and the other end is connected to the circulation pipe 31. With this configuration, the reaction liquid formed after sufficient reaction in the pressurized reactor 1 can enter the discharge pipe 4 through the circulation pipe 31 and then be discharged to the reaction liquid collection device 8, so as to effectively collect the crude ammonium formate product generated by the reaction. The reaction liquid collection device 8 can also be further connected to an ammonium formate purification device for purifying the ammonium formate in the collected reaction liquid to obtain high-purity ammonium formate.

[0035] Furthermore, in this embodiment of the invention, a filter 41 is provided at the connection between the discharge pipe 4 and the circulation pipe 31 to prevent the solid catalyst from flowing out through the discharge pipe 4. It should be noted that a catalyst needs to be added during the synthesis of ammonium formate. This catalyst can be an insoluble solid catalyst and / or a soluble catalyst. If a soluble catalyst is added, it can be added to the reaction raw material supply device 7 in the required proportion for the reaction, thereby continuously supplying the catalyst through the feed pipe 5 to maintain the catalytic activity of the reaction system. The reaction liquid discharged through the discharge pipe 4 can be purified to separate the ammonium formate from the catalyst. If an insoluble solid catalyst is added, it can be pre-added to the pressure reactor 1, and the filter 41 provided in this embodiment of the invention can prevent the solid catalyst from flowing out. The filter pore diameter of the filter 41 needs to be smaller than the particle size of the solid catalyst to ensure that the solid catalyst always remains in the pressure reactor 1, thereby maintaining the catalytic activity of the reaction system and further promoting the efficient synthesis of ammonium formate.

[0036] Furthermore, in this embodiment of the invention, the connection between the discharge pipe 4 and the circulation pipe 31 is located between the pressurized circulation pump 33 and the discharge end of the circulation pipe 31; a first flow valve 34 is provided between the connection between the discharge pipe 4 and the circulation pipe 31 and the discharge end of the circulation pipe 31; a second flow valve 42 is provided in the discharge pipe 4. With this configuration, when the liquid in the pressurized reactor 1 is pumped to the connection between the discharge pipe 4 and the circulation pipe 31 by the pressurized circulation pump 33, the liquid can enter the discharge pipe 4 and / or the circulation pipe 31. By adjusting the first flow valve 34 and the second flow valve 42, the flow of the liquid into the pipe can be controlled. Specifically, in the initial stage of the reaction, when the liquid in the pressurized reactor 1 has not yet fully reacted and the conversion rate of the reaction liquid has not reached the set value, the liquid in the pressurized reactor 1 can be continuously circulated through the jet circulation reactor by opening the first flow valve 34 and closing the second flow valve 42, so as to fully react with carbon monoxide. After the reaction has been going on for a period of time, when the conversion rate of the reaction liquid reaches the set value, the second flow valve 42 can be opened, and the first flow valve 34 can be closed or its flow rate reduced as needed to ensure that the reaction liquid formed after the full reaction can be discharged through the discharge pipe 4 for the collection of crude ammonium formate. While the reaction liquid is being discharged through the discharge pipe 4, an equal amount of reaction raw material mixture can also be fed into the feed pipe 5, so that after the reaction liquid is completely discharged, the newly added reaction raw material mixture can be used to continue the reaction, making the synthesis process of ammonium formate continuous.

[0037] According to one or more embodiments of the present invention, in the continuous synthesis of ammonium formate based on a jet circulation reactor provided by the present invention, an insoluble solid catalyst can be pre-added to the pressurized reactor 1. The required mixture of reaction raw materials can be pre-stored in the reaction raw material supply device 7, and fed into the pressurized reactor 1 through the feed pipe 5 and the Venturi injector 32. Simultaneously, carbon monoxide is continuously introduced into the pressurized reactor 1 through the carbon monoxide feed pipe 2. The pressurized circulation pump 33 and the first flow valve 34 are turned on, and the second flow valve 42 is closed, allowing the liquid in the pressurized reactor 1 to be circulated by the pressurized circulation pump 33. The gaseous carbon monoxide is discharged from the bottom of the pressurized reactor 1 and pumped into the Venturi injector 32. The negative pressure generated by the Venturi injector 32 draws the carbon monoxide into the Venturi injector 32, allowing the gaseous carbon monoxide to come into full contact with other reaction raw materials and be sprayed into the pressurized reactor 1 in the form of fine droplets for efficient reaction. After this cycle is repeated for a period of time, the conversion rate reaches the set value. The second flow valve 42 can be opened, and the first flow valve 34 can be closed or reduced, so that the reaction liquid pumped into the circulation pipe 31 enters the discharge pipe 4 and is discharged into the reaction liquid collection device 8. The solid catalyst is retained in the circulation pipe 31 by the filter 41. While discharging the material, the new reaction raw material mixture is fed into the pressurized reactor 1 by opening the third flow valve 51, and the first flow valve 34 is opened, while the second flow valve 42 is closed or reduced. By repeating the above cycle, the new reaction raw material mixture and the retained solid catalyst can continue to be efficiently mixed with the continuously introduced carbon monoxide under the action of the Venturi injector 32, so as to achieve the continuous synthesis of ammonium formate.

[0038] In summary, this invention provides an apparatus for the continuous synthesis of ammonium formate based on a jet-circulating reactor, belonging to the field of ammonium formate synthesis technology. The apparatus includes a pressurized reactor 1, a carbon monoxide feed pipe 2, and a jet-circulating reactor. The carbon monoxide feed pipe 2 is connected to the top inlet of the pressurized reactor 1. The jet-circulating reactor includes a circulation pipe 31, a Venturi ejector 32, and a pressurized circulation pump 33 installed in the circulation pipe 31. The feed end of the circulation pipe 31 is connected to the bottom outlet of the pressurized reactor 1, and the outlet end of the circulation pipe 31 is connected to the inlet of the Venturi ejector 32. The outlet of the Venturi ejector 32 is located in the upper part of the inner cavity of the pressurized reactor 1. This invention utilizes the jet-circulating reactor to pump the liquid material in the pressurized reactor 1 from the bottom and then spray it out from the top through the Venturi ejector 32, thereby ensuring sufficient contact between the gaseous carbon monoxide in the upper part of the pressurized reactor 1 and other reactants, thus improving reaction efficiency. Furthermore, the gaseous carbon monoxide can be continuously replenished for the continuous synthesis of ammonium formate.

[0039] It should be noted that this utility model is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and function as the technical concept within the scope of this utility model are included within the technical scope of this utility model. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, are also included within the scope of this utility model without departing from the spirit of this utility model.

Claims

1. An apparatus for the continuous synthesis of ammonium formate based on a jet circulation reactor, characterized in that, Includes a pressurized reactor, a carbon monoxide feed pipe, and a jet circulation reactor; The carbon monoxide feed pipe is connected to the top air inlet of the pressurized reactor; The jet circulation reactor includes a circulation pipe, a Venturi ejector, and a pressurized circulation pump installed in the circulation pipe; the inlet end of the circulation pipe is connected to the bottom outlet of the pressurized reactor, the outlet end of the circulation pipe is connected to the inlet of the Venturi ejector, and the outlet of the Venturi ejector is located in the upper part of the inner cavity of the pressurized reactor.

2. The apparatus for continuous synthesis of ammonium formate based on a jet circulation reactor according to claim 1, characterized in that, The apparatus for continuous synthesis of ammonium formate based on a jet circulation reactor also includes a feed pipe and a discharge pipe connected to the circulation pipe.

3. The apparatus for continuous synthesis of ammonium formate based on a jet circulation reactor according to claim 2, characterized in that, One end of the feed pipe is connected to the reaction raw material supply device, and the other end is connected to the discharge end of the circulation pipe.

4. The apparatus for continuous synthesis of ammonium formate based on a jet circulation reactor according to claim 2, characterized in that, One end of the discharge pipe is connected to the reaction liquid collection device, and the other end is connected to the circulation pipe.

5. The apparatus for continuous synthesis of ammonium formate based on a jet circulation reactor according to claim 4, characterized in that, A filter is installed at the connection between the discharge pipe and the circulation pipe to prevent solid catalyst from flowing out through the discharge pipe.

6. The apparatus for continuous synthesis of ammonium formate based on a jet circulation reactor according to claim 4, characterized in that, The connection between the discharge pipe and the circulation pipe is located between the pressurized circulation pump and the discharge end of the circulation pipe.

7. The apparatus for continuous synthesis of ammonium formate based on a jet circulation reactor according to claim 4, characterized in that, In the circulation pipeline, a first flow valve is provided between the connection point of the discharge pipeline and the circulation pipeline and the discharge end of the circulation pipeline; a second flow valve is provided in the discharge pipeline.

8. The apparatus for continuous synthesis of ammonium formate based on a jet circulation reactor according to claim 2, characterized in that, A third flow valve is installed in the feed pipe.

9. The apparatus for continuous synthesis of ammonium formate based on a jet circulation reactor according to claim 1, characterized in that, The feed end of the carbon monoxide feed pipe is connected to the carbon monoxide supply device.

10. The apparatus for continuous synthesis of ammonium formate based on a jet circulation reactor according to claim 1, characterized in that, The pressurized reactor is equipped with a pressure monitoring device to control the pressure inside the reactor and stabilize it.

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