Nitrotoluene reaction device

Abstract

The utility model provides a nitrotoluene reaction device. The nitrotoluene reaction device comprises an annular bin, a first feeding bin, a second feeding bin and a third feeding bin, an annular cavity is formed in the annular bin, and a discharging hole is formed in the side wall and communicated with the annular cavity. The first feeding bin, the second feeding bin and the third feeding bin are communicated with the annular bin and used for providing reaction materials for the annular bin. Materials in the feeding bins enter the annular cavity to be subjected to mixed reaction, reactants circularly move in the annular cavity in the unified direction, and the reactants are discharged through the discharging holes after being fully reacted. In order to accurately control material feeding, a first dosage pump, a second dosage pump and a third dosage pump are arranged between the first feeding bin, the second feeding bin and the annular bin and between the third feeding bin and the annular bin respectively, and the accuracy of the reaction proportion is ensured. The whole device adopts a compact annular layout, so that the occupied area is greatly reduced. And meanwhile, through optimized heat management and annular compact layout, the overall production efficiency and safety are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nitro toluene reaction field especially relates to a nitro toluene reaction device. BACKGROUND

[0002] The traditional production mode of nitrotoluene adopts large reaction kettle for batch production, and the nitrotoluene production device adopting the reaction kettle for production has the structure as shown in the figure. Figure 1 This reaction kettle type process has many problems: first, in order to meet the capacity demand, the volume of the reaction kettle is usually more than 3000L, the material feeding amount is large, and manual intervention is more; second, the reaction belongs to exothermic nitration reaction, and it is difficult to remove heat in time, which leads to slow reaction speed; third, the heat transfer area of the large reaction kettle is small, the heat removal is limited, and the risk of reaction out of control is high, which is easy to cause large safety accidents; fourth, the batch intermittent production mode, the capacity is difficult to fully exert.

[0003] In general, the traditional reaction kettle type production process cannot meet the current demand of nitrotoluene production. On the one hand, this process has a capacity bottleneck, which is difficult to meet the rapid growth of market demand; on the other hand, the high risk of nitration reaction also makes this way increasingly concerned and limited. Therefore, it is urgent to adopt new production technology to replace the traditional reaction kettle type process, in order to improve production efficiency, ensure safety, and reduce energy consumption and environmental load, and promote the sustainable development of nitrotoluene industry. UTILITY MODEL CONTENT

[0004] In view of the above problems, the present application aims to provide a small volume device with small flow feeding in a circulating manner, which replaces the traditional reaction kettle type process to improve production efficiency, ensure safety, and reduce energy consumption and environmental load.

[0005] In order to achieve the above purpose, the present application provides a nitrotoluene reaction device, which comprises: an annular bin, a first feeding bin, a second feeding bin and a third feeding bin, the annular bin is provided with an annular cavity, the side wall of the annular bin is provided with a discharge hole, and the discharge hole is in communication with the annular cavity; the first feeding bin is in communication with the annular bin, and the first feeding bin is used for providing reaction materials to the annular bin; the second feeding bin is in communication with the annular bin, and the second feeding bin is used for providing reaction materials to the annular bin; the third feeding bin is in communication with the annular bin, and the third feeding bin is used for providing reaction materials to the annular bin.

[0006] Differing from the prior art, the nitrotoluene reaction device provided by the technical scheme has a ring cavity structure, which can effectively increase the contact time and mixing degree of the reaction materials, thereby promoting the full chemical reaction, and the design of the discharge hole ensures the smooth flow of the reaction materials. By arranging the metering pumps between the first, second and third feeding bins and the ring bin, the addition amount of the materials can be accurately controlled, the accuracy of the reaction ratio is ensured, and the stability of the product quality is ensured. In addition, the entire device has a compact ring layout, which greatly reduces the floor area and improves the space utilization efficiency, which is not only beneficial to the integration and deployment of the device, but also leaves sufficient development space for subsequent expansion and upgrading.

[0007] In some embodiments, the ring bin comprises: a power section, a reaction section, a first connecting section, and a second connecting section, the power section and the reaction section are arranged in parallel with each other, and the flow directions of the liquids in the power section and the reaction section are opposite; one end of the first connecting section is in communication with the upper opening of the power section, and the other end of the first connecting section is in communication with the upper opening of the reaction section; one end of the second connecting section is in communication with the lower opening of the power section, and the other end of the second connecting section is in communication with the lower opening of the reaction section.

[0008] In some embodiments, the power section comprises: a power pipe, a paddle, and a power source; the paddle is a plurality of, a plurality of the paddle is arranged in the power pipe along the extension direction of the power pipe, and a plurality of the paddle is connected with the output end of the power source, and the power source is used to drive a plurality of the paddle to rotate.

[0009] In some embodiments, the nitrotoluene reaction device further comprises: a heat exchanger, the heat exchanger is sleeved on the reaction section, and the heat exchanger is used to remove the heat generated by the reaction.

[0010] In some embodiments, the nitrotoluene reaction device further comprises: a jacket, the jacket is sleeved on the power section, and the jacket is used to remove the heat generated by the reaction.

[0011] In some embodiments, the reaction section is provided with a cold and hot coal inlet, and the power section is provided with a cold and hot coal outlet.

[0012] In some embodiments, the second connecting section is provided with a sampling port, and the sampling port is used to extract the materials in the ring cavity.

[0013] In some embodiments, the communication between the first feeding bin and the ring bin is located at the upper part of the power section, the communication between the second feeding bin and the ring bin is located at the lower part of the power section, and the communication between the third feeding bin and the ring bin is located at the reaction section.

[0014] The utility model provides a nitrotoluene reaction device which has the following beneficial effects: The utility model provides a nitrotoluene reaction device which comprises an annular bin, a first feed bin, a second feed bin and a third feed bin. The annular flow reaction technology is adopted in the production process of nitrotoluene to replace the traditional kettle type reaction process. This technology not only improves the safety of production, but also significantly reduces the size of the device through the application of new equipment. The real-time volume is about one tenth of that of the traditional kettle type equipment. The small size design ensures that the risk is within a controllable range even if an abnormal situation occurs, thereby enhancing the safety of the overall device.

[0015] The utility model adopts the annular flow mode of small flow feeding and is equipped with a large-area heat exchanger, which can ensure that the heat generated during the reaction is removed in time and quickly, avoiding overheating. In addition, the system realizes continuous and stable feeding, full automation of the process, and periodic inspection by the on-site operator, greatly reducing the labor cost and the risk of human error. Specifically, through the precise measurement of the first, second and third dosing pumps, continuous feeding of the material can be realized to ensure the stability of the reaction process. The system is built-in with a power pipe, a paddle and a power source, so that the material realizes good annular flow in the annular bin, and the heat is effectively removed through the heat exchanger and the jacket. At the same time, by controlling the amount of feeding, the residence time of the material in the annular bin can be flexibly adjusted to optimize the reaction effect.

[0016] The design of the heat exchanger ensures sufficient heat exchange area, so that the heat generated by the reaction can be quickly removed, which greatly ensures the safety and efficiency of the reaction. In addition, the internal volume of the annular bin is small, and the amount of stored material is also reduced accordingly, so even if an abnormal working condition occurs, the damage caused will be significantly reduced, further reducing the risk of the device.

[0017] In addition, the utility model provides a nitrotoluene reaction device which realizes full automation of the process, only one operator is needed for inspection, greatly improving the production efficiency and reducing the labor intensity.

[0018] In summary, the utility model introduces new technology and equipment to optimize the production process of nitrotoluene, not only improves the safety and efficiency, but also realizes the compactness of the equipment and the automation of the process, providing an effective solution for the sustainable development of industrial production.

[0019] The above description is only a summary of the technical scheme of the application. In order to more clearly understand the technical means of the application, the specific embodiments of the application can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments, and are not intended to limit the scope of the application. Moreover, in the drawings, like reference numerals refer to similar components throughout the several views. In the drawings:

[0021] Figure 1 The structure diagram of nitrotoluene production device using reaction kettle for production is described as background art;

[0022] Figure 2 The structure diagram of heat exchanger and jacket is described as specific embodiment;

[0023] Figure 3 The structure diagram of reaction device is described as specific embodiment;

[0024] Figure 4 The structure diagram of annular bin is described as specific embodiment;

[0025] Figure 5 The structure diagram of power section is described as specific embodiment.

[0026] Explanation of reference numerals:

[0027] 10, annular bin; 20, first feed bin; 30, second feed bin; 40, third feed bin; 50, heat exchanger; 60, jacket;

[0028] 11, annular cavity; 12, discharge hole; 13, power section; 14, reaction section; 15, first connecting section; 16, second connecting section;

[0029] 131, power pipe; 132, paddle; 133, power source; 134, cold and hot coal outlet;

[0030] 141, cold and hot coal inlet;

[0031] 161, sampling port. Specific embodiment

[0032] The embodiments of the technical scheme of the application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the application, and therefore only serve as examples, and cannot limit the protection scope of the application.

[0033] 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 application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise noted, the terms "including" and "comprising" are open-ended and do not exclude the presence of unrecited elements or limitations.

[0034] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0035] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0037] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0038] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as limiting the embodiments of the present application. The orientation or position of the device or element indicated, and therefore cannot be understood as limiting the embodiments of the present application.

[0039] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0040] Please refer to Figures 2-5 The embodiment provides a nitrotoluene reaction device, which comprises a ring-shaped bin 10, a first feeding bin 20, a second feeding bin 30 and a third feeding bin 40. The ring-shaped bin 10 is internally provided with a ring-shaped cavity 11. A discharge hole 12 is formed in the side wall of the ring-shaped bin 10 and is in communication with the ring-shaped cavity 11. The first feeding bin 20 is in communication with the ring-shaped bin 10 and is used for providing reactant materials to the ring-shaped bin 10. The second feeding bin 30 is in communication with the ring-shaped bin 10 and is used for providing reactant materials to the ring-shaped bin 10. The third feeding bin 40 is in communication with the ring-shaped bin 10 and is used for providing reactant materials to the ring-shaped bin 10.

[0041] In the embodiment, each feeding bin can be in communication with the ring-shaped bin 10 through a pipe. In the reaction process, the materials in each feeding bin can enter the ring-shaped cavity 11 of the ring-shaped bin 10 through the pipe and react in the ring-shaped cavity 11. After the reactants are mixed, the reactants move in a uniform direction in the ring-shaped cavity 11 to sufficiently perform a chemical reaction. After the reaction is qualified, the reactant materials are discharged through the discharge hole 12 and enter the subsequent process. In addition, the whole device adopts a ring-shaped structure, which not only improves the mixing efficiency of the reactant materials, but also reduces the floor area of the device itself.

[0042] Further, in order to accurately control the addition amount of the materials, the first feeding bin 20, the second feeding bin 30 and the third feeding bin 40 are respectively provided with first, second and third dosing pumps on the pipe in communication with the ring-shaped bin 10. The first, second and third dosing pumps are used for conveying materials and dosing the amount of materials, so as to ensure the accuracy of the reaction ratio.

[0043] In general, the nitrotoluene reaction device provided by the embodiment adopts the annular cavity 11 structure, which can effectively improve the contact time and mixing degree of the reaction materials, thereby promoting the full progress of the chemical reaction, and the design of the discharge hole 12 ensures the smooth outflow of the reaction materials. By setting the dosing pump between the first feeding bin 20, the second feeding bin 30, and the third feeding bin 40 and the annular bin 10, the addition amount of the materials can be accurately controlled, the accuracy of the reaction ratio is ensured, and the stability of the product quality is guaranteed. In addition, the entire device adopts a compact annular layout, which greatly reduces the floor area and improves the space utilization efficiency, which is not only conducive to the integration and deployment of the device, but also leaves sufficient development space for subsequent expansion and upgrading.

[0044] Further, the materials rotate in the clockwise or counterclockwise direction in the annular cavity 11 to improve the mixing efficiency, and the annular arrangement of the annular bin 10 increases the contact area between the annular bin 10 and the air to improve the heat dissipation effect. The annular bin 10 is preferably a waist-round structure.

[0045] Please refer to Figures 2-5 In some embodiments, the annular bin 10 includes a power section 13, a reaction section 14, a first connecting section 15, and a second connecting section 16.

[0046] The power section 13 and the reaction section 14 are arranged in parallel with each other, and the flow directions of the liquids in the power section 13 and the reaction section 14 are opposite. The first connecting section 15 and the second connecting section 16 are used to connect the power section 13 and the reaction section 14 to form an integral whole. Specifically, one end of the first connecting section 15 is in communication with the upper opening of the power section 13, and the other end of the first connecting section 15 is in communication with the upper opening of the reaction section 14. One end of the second connecting section 16 is in communication with the lower opening of the power section 13, and the other end of the second connecting section 16 is in communication with the lower opening of the reaction section 14. It should be noted that the power section 13 is a straight pipe body with two open ends and a hollow interior, and the reaction section 14 is also a pipe body with two open ends and a hollow interior. The upper half of the power section 13 is in communication with the upper half of the reaction section 14 through the first connecting section 15, and the lower half of the power section 13 is in communication with the lower half of the reaction section 14 through the second connecting section 16. Thus, the upper half of the power section 13 is in communication with the upper half of the reaction section 14, and the lower half is also in communication with each other through the second connecting section 16. This forms a closed annular flow path, providing a channel for the circulation of the reaction materials.

[0047] In the embodiment, the power section 13 and the reaction section 14 are straight, and the first connecting section 15 and the second connecting section 16 are arc-shaped. The parallel arrangement of the power section 13 and the reaction section 14 is conducive to making full use of the space and improving the compactness of the device. At the same time, the opposite flow directions of the two sections also help to enhance the mixing effect of the materials and promote the progress of the chemical reaction, thereby providing strong support for improving the product yield and reaction efficiency. In general, the design of the annular flow path fully considers the hydrodynamic characteristics of the reaction process, and further optimizes the performance of the entire reaction system through reasonable pipeline layout and flow direction control, thereby ensuring the continuous circulation of the reaction materials and greatly improving the completeness and uniformity of the reaction.

[0048] Please refer to Figures 2-5 In some embodiments, the power section 13 comprises a power pipe 131, paddles 132, and a power source 133. The paddles are arranged in an array inside the power pipe 131 along the extension direction of the power pipe 131, and are connected to the output end of the power source 133. The power source 133 is used to drive the rotation of the paddles.

[0049] In the embodiment, the power pipe 131 is a hollow pipe structure, and a plurality of paddles 132 are arranged inside. The paddles 132 are arranged in an array along the extension direction of the power pipe 131 and are connected to the output end of the power source 133. The power source 133 can drive the rotation of the paddles 132, thereby generating the pushing force of the fluid.

[0050] In some embodiments, an extension pipe is further provided, which is connected to the power pipe 131 and located above the power pipe 131. The first connecting section 15 is connected to the extension pipe. The extension pipe further optimizes the flow of the fluid inside the power pipe 131 and promotes the circulation of the reaction materials in the annular bin 10. It is worth noting that the output end of the power source 133 penetrates the side wall of the annular bin 10, which not only facilitates the installation and maintenance of the power source 133, but also avoids energy loss during power transmission.

[0051] In general, the design of the power section 13 in the embodiment fully utilizes the principle of fluid mechanics, generates a pushing force through the rotation of the paddles 132, drives the circulation of the reaction materials in the annular bin 10, and further optimizes the flow field through the design of the extension pipe, thereby improving the overall flow performance and providing strong support for the efficient circulation of the reaction materials.

[0052] Please refer to Figures 2-5In some embodiments, the nitrotoluene reaction device further comprises a heat exchanger 50, which is sleeved on the reaction section 14 and is used to remove the heat generated by the reaction.

[0053] In this embodiment, the design of the heat exchanger 50 takes into account the optimization of heat conduction and fluid flow, which enables it to efficiently transfer the excess heat in the reaction section 14 to the external cooling medium, thereby maintaining the appropriate temperature of the reaction, preventing side reactions or product degradation caused by overheating, ensuring the selectivity of the reaction and the purity of the product, and improving the efficiency of the reaction and the quality of the product. At the same time, it can also reduce equipment wear and maintenance costs, and prolong the service life of the equipment. In addition, the design of the heat exchanger 50 also helps to improve energy utilization efficiency, and by recycling some heat, it can be used for other process steps or heating other feedstocks, further reducing energy consumption and enhancing the economic and sustainable nature of the overall production process.

[0054] Please refer to Figures 2-5 In some embodiments, the nitrotoluene reaction device further comprises a jacket 60, which is sleeved on the power section 13 and is used to remove the heat generated by the reaction.

[0055] In this embodiment, the jacket 60 can adopt a double-layer structure, and the space formed in the middle can be used as a channel for the cooling medium, so that the cooling liquid circulates and flows in the jacket 60, thereby effectively reducing the temperature in the power section 13. Through the jacket 60, the heat generated by the power section 13 during operation can be quickly transferred to the cooling medium, ensuring that the flow of reactants will not affect the reaction effect due to overheating. The material selection of the jacket 60 takes into account good thermal conductivity, so as to quickly and efficiently remove heat. In addition, the design of the jacket 60 also helps to improve the overall thermal efficiency of the reaction device, avoiding equipment damage or reaction instability caused by heat accumulation, while providing a more stable temperature environment for subsequent reactions.

[0056] In general, the technical solution adopted in this embodiment effectively controls the temperature of the power section 13, ensuring that the reaction is carried out within the optimal temperature range, thereby improving the efficiency of the reaction and the quality of the product. The cooling function of the jacket 60 also helps to prevent equipment damage caused by high temperature, prolongs the service life of the reaction device, and reduces maintenance costs. In addition, by optimizing heat management, the design of the jacket 60 also improves the overall energy utilization efficiency, providing a more economical and sustainable solution for industrial production. This heat removal mechanism makes the reaction process more safe and reliable, further promoting the efficient production of nitrotoluene.

[0057] Please refer to Figures 2-5In some embodiments, the reaction section 14 is provided with a cold-hot coal inlet 141, and the power section 13 is provided with a cold-hot coal outlet 134.

[0058] In this embodiment, cold-hot coal enters the reaction section 14 through the cold-hot coal inlet 141, absorbs heat during the reaction process, thereby reducing the temperature of the reaction section 14. The absorbed heat is then discharged through the cold-hot coal outlet 134 on the power section 13, achieving effective heat transfer. This circulating cold-hot coal system ensures that the interior of the reaction section 14 is maintained within an optimal temperature range, promoting efficient reaction and avoiding side reactions or product quality issues caused by overheating. At the same time, this temperature regulation measure helps protect the reaction equipment and prolong its service life.

[0059] Please refer to Figures 2-5 In some embodiments, the second connecting section 16 is provided with a sampling port 161 for extracting material from the annular cavity 11.

[0060] In this embodiment, the second connecting section 16 of the annular chamber 10 is provided with a sampling port 161 through which a sample of the material being reacted can be extracted from the annular cavity 11 for real-time monitoring and analysis of the reaction process. Specifically, during the reaction process, the material continuously circulates along the annular cavity 11. By providing the sampling port 161 on the second connecting section 16, the operator can at any time extract a sample of the material being reacted for detection and analysis of temperature, concentration, pH, and other indicators. These real-time data can reflect the progress and quality changes of the reaction, providing a basis for timely adjustment of process parameters to ensure that the reaction can be carried out stably and efficiently.

[0061] In summary, the design of the sampling port 161 enhances the monitoring capability of the reaction device, enabling the operator to grasp the dynamic changes of the reaction in real time and promptly identify and handle abnormal situations, which not only helps improve the stability of product quality but also lays the foundation for automated control of the reaction process, further enhancing overall production efficiency.

[0062] Please refer to Figures 2-5 In some embodiments, the first feed chamber 20 is connected to the annular chamber 10 at the upper part of the power section 13, the second feed chamber 30 is connected to the annular chamber 10 at the lower part of the power section 13, and the third feed chamber 40 is connected to the annular chamber 10 at the reaction section 14. In this embodiment, by using feed chambers at different heights, the material entering the annular chamber 10 is more uniformly mixed, ensuring that the reactants can fully react, reducing the reaction time, and improving the reaction rate.

[0063] The first supply bin 20 is higher than the through-connection of the first supply bin 20 and the annular bin 10, the second supply bin 30 is higher than the through-connection of the second supply bin 30 and the annular bin 10, and the third supply bin 40 is higher than the through-connection of the third supply bin 40 and the annular bin 10. The heights of the first supply bin 20, the second supply bin 30 and the third supply bin 40 are all higher than the through-connections of the first supply bin 20, the second supply bin 30 and the third supply bin 40 and the annular bin 10, so that the stability of the material flow can be enhanced by using gravity, the dependence on external power can be reduced, and the overall efficiency of the system can be improved.

[0064] In addition, the scheme can reduce the stagnation and deposition of the material during the flow process, reduce the risk of system blockage, and ensure the stability of the reaction process.

[0065] Further, according to the above scheme, the following examples can be developed:

[0066] A nitro-toluene reaction device comprises an annular bin 10, a first supply bin 20, a second supply bin 30 and a third supply bin 40. Three materials in the first supply bin 20, the second supply bin 30 and the third supply bin 40 enter the annular bin 10 through a first dosing pump, a second dosing pump and a third dosing pump respectively, and form a closed loop after passing through a heat exchanger, a first connecting section 15 and a second connecting section 16 under the thrust of a power section 13. The materials are internally forced to circulate, react, and the heat generated by the reaction is removed through a jacket 60 and the heat exchanger. The flow rate into the annular bin 10 is controlled to control the reaction residence time of the materials in the annular bin 10, so as to achieve the purpose of sufficient reaction. The reaction of the materials is detected, and sampling is performed through a sampling port 161 for intermediate control. After the materials are qualified, the materials are discharged through a discharge hole 12 to enter the subsequent process.

[0067] By adopting the technical scheme, the utility model has the beneficial effects that, compared with the prior art:

[0068] The nitro-toluene reaction device provided by the utility model comprises an annular bin 10, a first supply bin 20, a second supply bin 30 and a third supply bin 40. In the production process of nitro-toluene, a circulating reaction technology is adopted to replace the traditional kettle-type reaction process. The technology not only improves the safety of production, but also significantly reduces the size of the device by using new equipment, and the real-time volume is about one tenth of that of the traditional kettle-type equipment. The small size design makes the risk within a controllable range even if an abnormal situation occurs, thereby enhancing the safety of the overall device.

[0069] The utility model discloses a small flow feeding loop mode, and is equipped with large area heat exchanger, can ensure that the heat produced in the reaction process is promptly removed, avoids the occurrence of overheating phenomenon. In addition, the system realizes continuous stable feeding, and all processes are automated, and the on -the -spot operator only needs to carry out regular inspection, and the human cost and the risk of human error are greatly reduced. Specifically, through the accurate measurement of the first dose pump, the second dose pump and the third dose pump, the continuous feeding reaction of the material can be realized, and the stability of the reaction process is ensured. The system is built-in power pipe 131, paddle 132 and power source 133, so that the material realizes good circulation in annular bin 10, and the heat is effectively removed through the heat exchanger and the jacket 60. At the same time, by controlling the feeding amount, the residence time of the material in the annular bin 10 can be flexibly adjusted to optimize the reaction effect.

[0070] The design of the heat exchanger ensures sufficient heat exchange area, so that the heat generated by the reaction can be quickly removed, which greatly guarantees the safety and efficiency of the reaction. In addition, the internal volume of the annular bin 10 is small, and the amount of stored material is also reduced accordingly, so even if abnormal conditions occur, the damage caused will be significantly reduced, further reducing the risk of the device.

[0071] In addition, the nitrotoluene reaction device provided by the utility model realizes the automation of the whole process, only one operator is needed for inspection, greatly improving the production efficiency and reducing the labor intensity.

[0072] In summary, the utility model introduces new technology and equipment, optimizes the production process of nitrotoluene, not only improves the safety and efficiency, but also realizes the compactness of the equipment and the automation of the process, providing an effective solution for the sustainable development of industrial production.

[0073] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A nitrotoluene reaction apparatus characterized by comprising: The application relates to a reactor for producing coal-based solid fuel, which comprises the following parts: a ring-shaped bin with a ring-shaped cavity, a side wall of the ring-shaped bin being provided with a discharging hole which is communicated with the ring-shaped cavity; a first feeding bin which is communicated with the ring-shaped bin and is used for feeding reactant materials to the ring-shaped bin; a second feeding bin which is communicated with the ring-shaped bin and is used for feeding reactant materials to the ring-shaped bin; a third feeding bin which is communicated with the ring-shaped bin and is used for feeding reactant materials to the ring-shaped bin.

2. The nitrotoluene reaction apparatus according to claim 1, wherein The ring-shaped bin comprises a power section, a reaction section, a first connecting section and a second connecting section. The power section and the reaction section are arranged in parallel and the flow directions of the liquid in the power section and the reaction section are opposite; one end of the first connecting section is communicated with the upper opening of the power section, and the other end of the first connecting section is communicated with the upper opening of the reaction section; one end of the second connecting section is communicated with the lower opening of the power section, and the other end of the second connecting section is communicated with the lower opening of the reaction section.

3. The nitrotoluene reaction apparatus according to claim 2, wherein The power section comprises a power pipe, paddles and a power source; the paddles are arranged in the power pipe in an array along the extension direction of the power pipe, and the paddles are connected with the output end of the power source, and the power source is used for driving the rotation of the paddles.

4. The nitro-toluene reaction apparatus of claim 2, wherein The application further comprises: a heat exchanger which is sleeved on the reaction section and is used for removing the heat generated in the reaction.

5. The nitro-toluene reaction apparatus of claim 2, wherein The application further comprises: a jacket which is sleeved on the power section and is used for removing the heat generated in the reaction.

6. The nitro toluene reaction apparatus of claim 2, wherein The reaction section is provided with a cold-hot coal inlet, and the power section is provided with a cold-hot coal outlet.

7. The nitrotoluene reaction apparatus of claim 2, wherein The second connecting section is provided with a sampling port which is used for extracting the materials in the ring-shaped cavity.

8. The nitro toluene reaction apparatus of claim 2, wherein, The communication position of the first feeding bin and the ring-shaped bin is located at the upper part of the power section, the communication position of the second feeding bin and the ring-shaped bin is located at the lower part of the power section, and the communication position of the third feeding bin and the ring-shaped bin is located at the reaction section.

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