Supergravity hydrolysis equipment for continuously preparing nitroguanidine

Abstract

The utility model relates to the technical field of synthesis of pesticide intermediates, and provides supergravity hydrolysis equipment for continuously preparing nitroguanidine, which comprises a supporting seat, supergravity equipment mounted at the top end of the supporting seat, a water inlet pump mounted at the top end of the supporting seat, and a frozen brine adjusting valve mounted at the top end of the supergravity equipment. A screw conveyor and a joint control mechanism are mounted at the bottom end of the supporting seat, and the joint control mechanism is arranged at the top end of the supporting seat and comprises a peristaltic pump; continuous production of nitroguanidine is achieved through an automatic control system, frequent manual operation is not needed, the production efficiency is greatly improved, accurate control is achieved, the system can accurately control the mixing proportion of nitroguanidine sulfate and primary water and the hydrolysis and crystallization temperature, the stability and consistency of product quality are ensured, and the production efficiency is improved. Energy conservation and emission reduction are achieved, and the mass transfer and heat transfer processes are enhanced through the application of the supergravity technology, so that the hydrolysis reaction is more efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of pesticide intermediate synthesis, and particularly relates to a supergravity hydrolysis device for continuously preparing nitroguanidine. Background Art

[0002] Nitroguanidine is an organic compound with the chemical formula CH 4 N 4 O 2 . It is used as an intermediate for imidacloprid and acetamiprid in pesticides to synthesize the next intermediate N-nitroiminoimidazolidine. In addition, it can be reduced to aminoguanidine, which is used to synthesize anti-angina drug trimetazidine, etc., and can also be used in the preparation of explosives and smokeless powder.

[0003] In the traditional synthesis process of nitroguanidine, the hydrolysis of nitroguanidine sulfate and the crystallization of nitroguanidine are often carried out separately, which not only affects the production efficiency, but also increases the production cost and the complexity of operation.

[0004] Therefore, those skilled in the art have proposed a supergravity hydrolysis device for continuously preparing nitroguanidine to solve the problems raised in the background art. Content of the Utility Model

[0005] In order to solve the above technical problems, the utility model provides a supergravity hydrolysis device for continuously preparing nitroguanidine to solve the problems that in the prior art, the hydrolysis of nitroguanidine sulfate and the crystallization of nitroguanidine are often carried out separately, which not only affects the production efficiency, but also increases the production cost and the complexity of operation.

[0006] A supergravity hydrolysis device for continuously preparing nitroguanidine includes a support base. A supergravity device is installed at the top of the support base. A water inlet pump is also installed at the top of the support base. A regulating cryogenic brine valve is installed at the top of the supergravity device. A screw conveyor is installed at the bottom of the support base;

[0007] A control linkage mechanism is arranged at the top of the support base.

[0008] Preferably, the control linkage mechanism includes a peristaltic pump. The peristaltic pump is installed at the top of the support base. A delivery pipe is installed at the output end of the peristaltic pump. A flow meter is arranged on the outer side wall of the delivery pipe.

[0009] Preferably, the outer side wall of the flow meter is connected by a wire to a transmission unit one. The other side wall of the transmission unit one is installed with a first control unit by a wire. One side of the outer side wall of the first control unit is installed with a first switch. The other side of the outer side wall of the first control unit is installed with a second switch. The outer side wall of the first control unit is installed with a transmission unit two by a wire. The transmission unit two is installed on the outer side wall of the water inlet pump by a wire.

[0010] Preferably, a second control unit is installed at the top of the supergravity device, and a third transmission unit is installed on the outer side wall of the regulating cryogenic brine valve through a wire. The third transmission unit is connected to the second control unit through a wire.

[0011] Preferably, the second transmission unit and the first transmission unit are symmetrically installed on both side walls of the first control unit.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. High-efficiency continuous production: Through the automatic control system, the continuous production of nitroguanidine is realized, without frequent manual operation, greatly improving the production efficiency.

[0014] 2. Precise control: The system can precisely control the mixing ratio of nitroguanidine sulfate and primary water, as well as the temperature of hydrolysis and crystallization, ensuring the stability and consistency of product quality.

[0015] 3. Energy conservation and emission reduction: The application of the supergravity technology strengthens the mass transfer and heat transfer processes, making the hydrolysis reaction more efficient, thereby reducing energy consumption and waste generation, meeting the requirements of green and environmental protection production.

[0016] 4. Simple operation: The system has a high degree of automation. The operator only needs to set relevant parameters, and the system can automatically complete the subsequent production process, reducing the operation difficulty and the requirements for the operator's skills. Description of the Drawings

[0017] Figure 1 is one of the three-dimensional schematic diagrams of the utility model;

[0018] Figure 2 is the second three-dimensional schematic diagram of the utility model;

[0019] Figure 3 is the utility model Figure 1 is the structural schematic diagram at A in

[0020] In the figure: 1. Support base; 11. Supergravity device; 12. Feed water pump; 13. Regulating cryogenic brine valve; 14. Screw conveyor; 2. Peristaltic pump; 21. Delivery pipe; 22. Flowmeter; 23. First transmission unit; 24. First control unit; 25. First switch; 26. Second switch; 27. Second transmission unit; 28. Second control unit; 29. Third transmission unit. Detailed Embodiment

[0021] The following further describes in detail the embodiments of the utility model with reference to the drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0022] As shown in the attached Figure 1 to the attached Figure 3 as follows:

[0023] Embodiment 1: The present utility model provides a supergravity hydrolysis device for continuously preparing nitroguanidine, including a support base 1. At the top of the support base 1, a supergravity device 11 is installed. At the top of the support base 1, a water inlet pump 12 is also installed. At the top of the supergravity device 11, a regulating cryogenic brine valve 13 is installed. At the bottom of the support base 1, a screw conveyor 14 is installed;

[0024] A control linkage mechanism is provided at the top of the support base 1. The control linkage mechanism includes a peristaltic pump 2. The peristaltic pump 2 is installed at the top of the support base 1. At the output end of the peristaltic pump 2, a delivery pipe 21 is installed. On the outer side wall of the delivery pipe 21, a flow meter 22 is provided.

[0025] Specifically, through the setting of the flow meter 22, the flow rate of the water inlet pump 12 can be calculated.

[0026] On the outer side wall of the flow meter 22, a transmission unit 1 23 is connected by a wire. On the other side wall of the transmission unit 1 23, a first control unit 24 is installed by a wire. On one side of the outer side wall of the first control unit 24, a first switch 25 is installed. On the other side of the outer side wall of the first control unit 24, a second switch 26 is installed. On the outer side wall of the first control unit 24, a transmission unit 2 27 is installed by a wire. The transmission unit 2 27 is installed on the outer side wall of the water inlet pump 12 by a wire. At the top of the supergravity device 11, a second control unit 28 is installed. On the outer side wall of the regulating cryogenic brine valve 13, a transmission unit 3 29 is installed by a wire. The transmission unit 3 29 is connected to the second control unit 28 by a wire. The transmission unit 2 27 and the transmission unit 1 23 are symmetrically installed on both side walls of the first control unit 24.

[0027] Specifically, through the setting of the second control unit 28, the internal temperature can be conveniently controlled, facilitating crystallization and mixing.

[0028] System startup and preparation:

[0029] First, the system starts up. The first control unit 24 conducts self-check to confirm that the status of each component is normal.

[0030] The operator sets the mixing ratio of nitroguanidine sulfate and primary water through the first switch 25 and the second switch 26 on the outer side of the first control unit 24. The ratio range can be adjusted between 1:3 and 1:6.

[0031] Transportation and mixing of nitroguanidine sulfate:

[0032] The peristaltic pump 2 starts, and conveys the reacted nitroguanidine sulfate solution to the high gravity device 11 through a pipeline.

[0033] Meanwhile, the flowmeter 22 starts to work, detects the flow rate of the nitroguanidine sulfate solution in real time, and sends the data to the transmission unit 1 23.

[0034] After receiving the data, the transmission unit 1 23 immediately forwards it to the first control unit 24.

[0035] Based on the preset mixing ratio and the received flow rate data, the first control unit 24 controls the operation of the water inlet pump 12 through the transmission unit 2 27, so as to inject an appropriate amount of primary water to mix with the nitroguanidine sulfate.

[0036] High gravity hydrolysis reaction:

[0037] The mixed nitroguanidine sulfate and primary water enter the high gravity device 11 and undergo a hydrolysis reaction under a high gravity environment.

[0038] The regulating chilled brine valve 13 equipped on the high gravity device 11 automatically adjusts according to the instructions of the second control unit 28 to ensure that the hydrolysis temperature is maintained within the range of 35°C to 45°C, thereby optimizing the hydrolysis efficiency.

[0039] Nitroguanidine crystallization and conveyance:

[0040] After the hydrolysis reaction is completed, the generated nitroguanidine solution is conveyed to the crystallization site through the screw conveyor 14.

[0041] During the crystallization process, the regulating chilled brine valve 13 controls the crystallization temperature within the range of 0°C to 10°C according to the instructions of the transmission unit 2 27 to promote the crystallization of nitroguanidine.

[0042] After crystallization is completed, the nitroguanidine solid material is conveyed to the nitroguanidine receiving tank through the screw conveyor 14 for subsequent processing or storage.

[0043] System monitoring and adjustment:

[0044] During the whole process, the control unit continuously monitors the working status of each component to ensure the stable operation of the system.

[0045] In case of abnormal situations, such as abnormal flow rate, temperature exceeding the range, etc., the control unit will immediately issue an alarm and automatically or prompt the operator to make necessary adjustments.

[0046] System shutdown and cleaning:

[0047] When the production of a batch of nitroguanidine is completed, the system can be shut down automatically or manually.

[0048] Before shutdown, the system will perform necessary cleaning and preparation work to ensure the smooth progress of the next batch of production.

[0049] All standard parts used in this utility model can be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0050] In the description of this utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0051] In this utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0052] In this utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "below", and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0053] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0054] In the attached drawings of the disclosed embodiments of the present utility model, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0055] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high gravity hydrolysis device for continuously preparing nitroguanidine, characterized in that: It comprises a support base (1), a super gravity device (11) is installed at the top of the support base (1), a water inlet pump (12) is also installed at the top of the support base (1), a valve (13) for adjusting the frozen brine is installed at the top of the super gravity device (11), and a screw conveyor (14) is installed at the bottom of the support base (1); A joint control mechanism is arranged on the top end of the support seat (1).

2. A high gravity hydrolysis device for continuously preparing nitroguanidine as claimed in claim 1, characterized in that: The joint control mechanism comprises a peristaltic pump (2), the peristaltic pump (2) being mounted on the top end of the support seat (1), a delivery pipe (21) being mounted on the output end of the peristaltic pump (2), and a flow meter (22) being disposed on the outer side wall of the delivery pipe (21).

3. A high gravity hydrolysis device for continuously preparing nitroguanidine as claimed in claim 2, characterized in that: The outer wall of the flow meter (22) is connected to a transmission unit 1 (23) via a wire, the other side wall of the transmission unit 1 (23) is installed with a first control unit (24) via a wire, one side of the outer wall of the first control unit (24) is installed with a first switch (25), the other side of the outer wall of the first control unit (24) is installed with a second switch (26), the outer wall of the first control unit (24) is installed with a transmission unit 2 (27) via a wire, and the transmission unit 2 (27) is installed on the outer wall of the water inlet pump (12) via a wire.

4. A high gravity hydrolysis device for continuously preparing nitroguanidine as claimed in claim 2, characterized in that: A second control unit (28) is installed at the top of the supergravity device (11), and a transmission unit three (29) is installed on the outer wall of the regulating chilled brine valve (13) through a wire, and the transmission unit three (29) is connected to the second control unit (28) through a wire.

5. A high gravity hydrolysis device for continuously preparing nitroguanidine as claimed in claim 3, characterized in that: The transmission unit 2 (27) and the transmission unit 1 (23) are symmetrically installed on the two side walls of the first control unit (24).

Images