A processing apparatus for producing dimethylformamide aqueous solvent

Abstract

This invention relates to a processing device for producing dimethylformamide aqueous solvent, aiming to solve the technical problem of low utilization rate of unreacted materials in the current production process of dimethylformamide aqueous solvent. The device includes a base, a distillation reactor, a multi-stage distillation structure, and a cooling tank. The invention features two heating plates that operate at different temperatures. The upper heating plate generates a temperature higher than the vaporization value of dimethylamine but lower than that of methanol, while the lower heating plate generates a temperature higher than the vaporization value of methanol but lower than that of formic acid. This allows for the distillation and separation of the unreacted mixture in the dimethylformamide aqueous solvent preparation process, enabling the collection of formic acid, dimethylamine, and methanol in separate layers for reuse. This effectively reduces waste of the unreacted mixture in the dimethylformamide aqueous solvent preparation process and improves utilization rate.

Description

Technical Field

[0001] This invention relates to the field of dimethylformamide aqueous solvent production technology, and in particular to a processing equipment for producing dimethylformamide aqueous solvent. Background Technology

[0002] Dimethylformamide is a colorless, transparent liquid with a strong, pungent odor. It has excellent solubility, capable of dissolving many organic substances such as alcohols, ketones, esters, and ethers. While its solubility in water is relatively low, it exhibits good solubility in organic solvents. Furthermore, dimethylformamide has a low vapor pressure and a high flash point, making it non-flammable and non-explosive. In industry, dimethylformamide is widely used as an organic solvent, reaction medium, and extractant. Due to its excellent solubility, it is commonly used in the preparation of coatings, adhesives, dyes, inks, and other chemicals. In the pharmaceutical industry, dimethylformamide is also frequently used in drug synthesis and extraction. However, dimethylformamide has a certain degree of toxicity and can irritate the skin, eyes, and respiratory tract. Long-term exposure may also cause liver and kidney damage. Therefore, appropriate protective measures must be taken when using dimethylformamide, such as wearing protective clothing, chemical protective goggles, and respirators. In summary, dimethylformamide is an important organic solvent with excellent solubility and a wide range of applications. Safety precautions must be taken when using it to avoid harm to human health and the environment.

[0003] The specific preparation process for producing dimethylformamide aqueous solvent is as follows:

[0004] Raw Material Preparation: Prepare appropriate amounts of formic acid, dimethylamine, and methanol according to production needs. These raw materials typically undergo quality inspection to ensure purity and reliability. Mixing and Stirring: Mix formic acid, dimethylamine, and methanol in a specific ratio and add them to the reaction vessel. Then start the stirrer to ensure thorough and uniform mixing. Heating and Reaction: Raise the temperature inside the reaction vessel to a suitable reaction temperature, typically around 100°C, using a heating system. During heating, the materials begin a chemical reaction, producing dimethylformamide aqueous solvent. Vacuum Distillation: After the reaction, reduce the pressure inside the reaction vessel to atmospheric pressure and perform distillation. Distillation separates water and unreacted methanol from the solvent, yielding a high-purity dimethylformamide aqueous solvent. Cooling and Collection: Cool the distilled dimethylformamide aqueous solvent to a suitable storage temperature. Then collect the solvent into storage containers using a collection system for subsequent packaging and transportation. Quality Inspection: During production, the dimethylformamide aqueous solvent should undergo quality inspection to ensure it meets relevant standards and customer requirements. Quality inspection includes testing of physical properties, chemical properties, and impurity content. Packaging and transportation: The qualified dimethylformamide aqueous solution is appropriately packaged and transported according to customer requirements to complete the production process.

[0005] Existing methods for producing dimethylformamide aqueous solvent and unreacted products involve distillation. Conventional methods typically employ a single high-temperature distillation process, which simultaneously separates formic acid, dimethylamine, and methanol from the unreacted products into the dimethylformamide aqueous solvent to improve its purity. However, this single-distillation method can only extract a mixture of formic acid, dimethylamine, and methanol, resulting in reduced utilization. Therefore, we propose a processing device for producing dimethylformamide aqueous solvent. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art, adapt to practical needs, and provide a processing equipment for producing dimethylformamide aqueous solvent, so as to solve the technical problem of low utilization rate of unreacted materials in the current production and preparation process of dimethylformamide aqueous solvent.

[0007] To achieve the objectives of this invention, the technical solution adopted is as follows: A processing device for producing dimethylformamide aqueous solvent is designed, comprising a base, a distillation reactor, a multi-stage distillation structure, and a cooling tank; the distillation reactor is arranged on the base; the multi-stage distillation structure is arranged on one side of the distillation reactor; the cooling tank is arranged on the side of the multi-stage distillation structure away from the distillation reactor; and the cooling tank is connected to the input end of the multi-stage distillation structure via a suction circulation pipe; and the cooling tank is connected to the output end of the multi-stage distillation structure via a pumping assembly; wherein, the base, distillation reactor, multi-stage distillation structure, cooling tank, suction circulation pipe, and pumping assembly constitute a multi-stage distillation separation structure. The multi-stage distillation structure includes a main circulation tank, an unreacted spiral pipe, a staged reaction sleeve, a heating plate, and a condensing pipe. The main circulation tank is located on one side of the distillation reactor. The internal gaps of the main circulation tank form an integrated condensing chamber. The unreacted spiral pipe passes through the main circulation tank and connects to the distillation reactor. The distillation gas discharge end of the distillation reactor is connected to the output end of the unreacted spiral pipe. The staged reaction sleeve is located below the unreacted spiral pipe. The internal gaps of the staged reaction sleeve form three operating chambers arranged vertically. The heating plate is located in the two operating chambers located at the upper end. The condensing pipe passes through the staged reaction sleeve.

[0008] Preferably, the unreacted spiral conduit is composed of a connecting part, a spiral part, and an annular part; wherein the connecting part, the spiral part, and the annular part are sequentially connected to the staged reaction sleeve.

[0009] Preferably, each of the operating chambers is provided with an upwardly extending integrated processing connection pipe; and the three operating chambers are all connected to each other through the integrated processing connection pipe, and one of the operating chambers located at the upper end is connected to the annular part through the integrated processing connection pipe, wherein the integrated processing connection pipe is provided with a spiral-shaped connecting channel inside.

[0010] Preferably, annular protrusions are fixed inside the two operating cavities located opposite each other at the upper end; wherein, the heating plate is arranged on the annular protrusion, and the two operating cavities located opposite each other at the upper end are separated by the gap between the heating plates to form an evaporation cavity and a manifold cavity.

[0011] Preferably, the evaporation chamber is located at the high end of the operating chamber; and the high end of the evaporation chamber is provided with a downwardly extending conical protrusion located at the center of the annular protrusion.

[0012] Preferably, the manifold is located at the lower end of the operating chamber; and the bottom of the manifold is provided with a flow distribution and collection plate with an arc-shaped structure, and the flow distribution and collection plate is high in the middle and low on the sides; wherein, the integrated processing connection pipes are all arranged on the side of the flow distribution and collection plate.

[0013] Preferably, the heating plate has an annular structure, and heating wires are uniformly arranged inside the heating plate; wherein, the inner wall of the heating plate has a plurality of extended protrusions arranged in an annular shape at equal intervals; wherein, the gap between two adjacent extended protrusions and the annular protrusions forms a drain hole; and, the surface of the heating plate is radially arranged from the center outward from high to low, wherein, the upper surface of the heating plate has a plurality of contact protrusions arranged in an annular shape at equal intervals, wherein, the gap between two adjacent contact protrusions forms a guide channel; wherein, the guide channel corresponds one-to-one with the drain hole, and the guide channel is connected to the manifold cavity through the drain hole.

[0014] Preferably, the condensation pipe consists of a main circulation pipe and branch condensation pipes, wherein the main circulation pipe is L-shaped and passes through the staged reaction sleeve; and the output end of the main circulation pipe is connected to the pump assembly. The two sets of branch condensation pipes are arranged sequentially in the two operating chambers located at opposite upper positions, and the branch condensation pipes consist of several annularly spaced sub-connecting pipes, wherein the sub-connecting pipes are adapted to the shape of the conical protrusion, and the sub-connecting pipes are connected to the main circulation pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. This invention includes two heating plates for heating, with different heating temperatures. The upper heating plate generates a temperature higher than the boiling point vaporization value of dimethylamine but lower than that of methanol, while the lower heating plate generates a temperature higher than the boiling point vaporization value of methanol but lower than that of formic acid. This design allows for the distillation and separation of unreacted substances in the dimethylformamide aqueous solvent preparation process, enabling the simultaneous collection of formic acid, dimethylamine, and methanol in separate layers for reuse. This effectively reduces waste of the unreacted substances in the dimethylformamide aqueous solvent preparation process and improves utilization.

[0017] 2. In this invention, the connecting part and the spiral part are set to form a conventional basis for the initial evaporation operation of the mixed solution of unreacted substances in the preparation of dimethylformamide aqueous solvent; and the annular part is set to facilitate the uniform distribution of the mixed solution of unreacted substances for secondary evaporation, condensation and separation. At the same time, the main circulation tank is fully enclosed, so that two separation processes can be carried out simultaneously in the secondary cold circulation operation.

[0018] 3. In this invention, the spiral-shaped connecting channel reduces the amount of unreacted mixed solution vapor flowing into the upper space during the secondary combined evaporation and condensation process, thereby reducing the possibility of remixing and doping.

[0019] 4. The present invention sets up an effective separation operating chamber by means of a heating plate, so that the mixed solution of unreacted substances is generated into two different physicochemical forms, namely gas and liquid, and the required separation operation can be performed according to the characteristics of each form.

[0020] 5. The present invention, through the setting of the conical protrusion and the setting of the arc structure on the upper surface of the evaporation chamber, enables one of the unreacted residues in the dimethylformamide aqueous solvent separated after vaporization to play a central guiding role. At the same time, the conical protrusion increases the contact area with one of the unreacted residues in the dimethylformamide aqueous solvent separated after vaporization, and facilitates central collection after condensation.

[0021] 6. The present invention uses a diversion and collection plate with a high middle section and low sides to facilitate the flow of unreacted mixed solution in the preparation of dimethylformamide aqueous solvent to the side of the diversion and collection plate, which guides the mixed solution and facilitates sufficient secondary distillation treatment, reducing the amount of mixed solution remaining in the manifold.

[0022] 7. The present invention can heat the entire heating plate by setting the heating wire, and the heating plate with the surface radiating outward from the center and from high to low makes it easy for the mixed solvent to flow to the drain hole. In addition, the mixed solution of the unreacted substances is set to flow to the side of the flow collection plate so that the mixed solvent can fully contact the heating plate for evaporation. The drain hole facilitates the separation operation of the secondary combined evaporation and condensation process.

[0023] 8. In this invention, several sub-connecting pipes adapted to the shape of the conical protrusion allow the coolant in the external and main circulation tank to flow in the distribution condenser pipe, thereby liquefying and condensing the evaporated single production raw material. This method also utilizes the channels connecting the main circulation pipe and the inside of the main circulation tank to perform synchronous circulation condensation. This condensation method is integrated, easy to control, and has a simple structure. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0025] Figure 2 This is a three-dimensional structural diagram of the multi-stage distillation structure in this invention;

[0026] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the multi-stage distillation structure in this invention;

[0027] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the staged reaction sleeve in this invention;

[0028] Figure 5 This is a three-dimensional structural diagram of the staged reaction sleeve from another perspective;

[0029] Figure 6 For the present invention Figure 5 A magnified view of the structure at point A in the middle;

[0030] Figure 7 This is a schematic diagram of the three-dimensional cross-sectional structure of the heating plate in this invention.

[0031] In the diagram: 1. Base; 2. Distillation reactor; 3. Multistage distillation structure; 4. Cooling tank; 5. Suction circulation pipeline; 6. Pump supply assembly; 7. Unreacted spiral pipeline; 8. Staged reaction sleeve; 9. Heating plate; 10. Condensation pipeline; 11. Main circulation tank;

[0032] 7011. Connecting part; 7012. Spiral part; 7013. Annular part;

[0033] 801. Annular protrusion; 802. Conical protrusion; 803. Diverter / collector plate;

[0034] 901. Contact protrusion; 902. Extension protrusion; 903. Leakage hole;

[0035] 1001, Main circulation pipe; 1002, Diverter condenser pipe. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0037] Example 1: A processing apparatus for producing dimethylformamide aqueous solvent, see [link to example]. Figures 1 to 7The system includes a base 1, a distillation reactor 2, a multi-stage distillation structure 3, and a cooling tank 4. The distillation reactor 2 is arranged on the base 1. The multi-stage distillation structure 3 is arranged on one side of the distillation reactor 2. The cooling tank 4 is arranged on the side of the multi-stage distillation structure 3 away from the distillation reactor 2. The cooling tank 4 is connected to the input end of the multi-stage distillation structure 3 through a suction circulation pipe 5. The cooling tank 4 is connected to the output end of the multi-stage distillation structure 3 through a pumping assembly 6. The base 1, distillation reactor 2, multi-stage distillation structure 3, cooling tank 4, suction circulation pipe 5, and pumping assembly 6 constitute a multi-stage distillation separation structure. The multi-stage distillation structure 3 includes a main circulation tank 11. The system includes an unreacted spiral pipe 7, a staged reaction sleeve 8, a heating plate 9, and a condensing pipe 10; a main circulation tank 11 is arranged on one side of the distillation reactor 2; and the internal gaps of the main circulation tank 11 form an integrated condensing chamber; the unreacted spiral pipe 7 passes through the main circulation tank 11 and connects to the distillation reactor 2; wherein, the distillation gas discharge end of the distillation reactor 2 is connected to the output end of the unreacted spiral pipe 7; the staged reaction sleeve 8 is arranged below the unreacted spiral pipe 7; and the internal gaps of the staged reaction sleeve 8 form three operating chambers arranged in a vertical sequence; the heating plate 9 is arranged in the two operating chambers located at the upper end; and the condensing pipe 10 passes through the staged reaction sleeve 8. This invention includes two heating plates 9, which are used for heating. The two heating plates 9 have different heating temperatures. The upper heating plate 9 generates a temperature higher than the boiling point vaporization value of dimethylamine but lower than that of methanol. The lower heating plate 9 generates a temperature higher than the boiling point vaporization value of methanol but lower than that of formic acid. Through this arrangement, the unreacted mixture solution in the preparation of dimethylformamide aqueous solvent can be distilled and separated to collect formic acid, dimethylamine, and methanol in layers simultaneously, facilitating reuse and effectively reducing waste of the unreacted mixture solution in the preparation of dimethylformamide aqueous solvent, thus improving utilization rate.

[0038] Specifically, the unreacted spiral pipe 7 is composed of a connecting part 7011, a spiral part 7012, and an annular part 7013; wherein the connecting part 7011, the spiral part 7012, and the annular part 7013 are sequentially connected to the staged reaction sleeve 8. In this invention, the connecting part 7011 and the spiral part 7012 form a conventional basis for the initial evaporation of the mixed solution of unreacted substances in the preparation of dimethylformamide aqueous solvent; and the annular part 7013 facilitates the uniform distribution of the mixed solution of unreacted substances for secondary evaporation, condensation, and separation. At the same time, the main circulation tank 11 fully encloses the pipe, allowing for simultaneous two separation processes during the secondary cold circulation operation.

[0039] Furthermore, each operating chamber is externally provided with an upwardly extending integrated processing connection pipe; and all three operating chambers are connected to each other via integrated processing connection pipes. One of the operating chambers located at the upper end is connected to the annular portion 7013 via an integrated processing connection pipe, wherein the integrated processing connection pipe contains a spiral-shaped connecting channel. In this invention, the spiral-shaped connecting channel reduces the flow of unreacted mixed solution vapors from the secondary combined evaporation and condensation process into the upper space, thus reducing the likelihood of remixing and doping.

[0040] Furthermore, annular protrusions 801 are fixed inside the two upper-positioned operating chambers; a heating plate 9 is arranged on the annular protrusions 801, and the two upper-positioned operating chambers are separated by the gap of the heating plate 9 to form an evaporation chamber and a confluence chamber. This invention effectively separates the operating chambers by using the heating plate 9, causing the unreacted mixture solution to produce two different physicochemical states—gas and liquid—which can then be adapted to the characteristics of each state for the required separation operation.

[0041] It is worth noting that the evaporation chamber is located at the high end of the operating chamber; and, at the high end of the evaporation chamber, a downwardly extending conical protrusion 802 is provided at the center of the annular protrusion 801. Through the arrangement of the conical protrusion 802 and the arc-shaped structure on the upper surface of the evaporation chamber, this invention ensures that one of the unreacted residues in the vaporized dimethylformamide aqueous solvent acts as a central guide. Simultaneously, the conical protrusion 802 increases the contact area with one of the unreacted residues in the vaporized dimethylformamide aqueous solvent, facilitating centralized collection after condensation.

[0042] It is worth noting that the manifold is located at the lower end of the operating chamber; and a flow-diverting and collecting plate 803 with an arc-shaped structure is provided at the bottom of the manifold, and the flow-diverting and collecting plate 803 is high in the middle and low on the sides; wherein, the integrated processing connecting pipes are all arranged on the sides of the flow-diverting and collecting plate 803. This invention, by setting the flow-diverting and collecting plate 803 with a high middle and low sides, facilitates the flow of the mixed solution of unreacted substances in the preparation of dimethylformamide aqueous solvent to the sides of the flow-diverting and collecting plate 803, which guides the mixed solution, facilitating sufficient secondary combined distillation treatment and reducing the amount of mixed solution remaining in the manifold.

[0043] It is worth mentioning that the heating plate 9 has a ring-shaped structure, and heating wires are evenly arranged inside the heating plate 9; the inner wall of the heating plate 9 has a number of extended protrusions 902 arranged in a ring at equal intervals; the gap between two adjacent extended protrusions 902 and the ring protrusions 801 forms a drain hole 903; the surface of the heating plate 9 is radial from the center outward from high to low, and the upper surface of the heating plate 9 has a number of contact protrusions 901 arranged in a ring at equal intervals, the gap between two adjacent contact protrusions 901 forms a guide channel; the guide channel corresponds one-to-one with the drain hole 903, and the guide channel is connected to the manifold through the drain hole 903. The present invention can heat the entire heating plate 9 by setting the heating wire. At the same time, the surface of the heating plate 9 is radially arranged from the center outward from the height, which makes it easy for the mixed solvent to flow to the drain hole 903. In addition, the mixed solution of the unreacted substances is arranged to flow to the side of the flow collection plate 803 so that the mixed solvent can fully contact the heating plate 9 for evaporation. The drain hole 903 facilitates the separation operation of the secondary combined evaporation and condensation process for the fine treatment.

[0044] It is worth emphasizing that the condensing pipe 10 consists of a main circulation pipe 1001 and a branch condensing pipe 1002. The main circulation pipe 1001 is L-shaped and passes through the staged reaction sleeve 8. The lower end of the main circulation pipe 1001 has a channel that communicates with the inside of the main circulation tank 11. The output end of the main circulation pipe 1001 is connected to the pump feed assembly 6. The two branch condensing pipes 1002 are arranged in sequence in two operating chambers located at opposite upper positions. The branch condensing pipe 1002 consists of several sub-connecting pipes that are distributed in a ring at equal intervals. The sub-connecting pipes are adapted to the shape of the conical protrusion 802 and are connected to the main circulation pipe 1001. In this invention, several sub-connecting pipes adapted to the shape of the conical protrusion 802 allow the coolant in the external environment and the main circulation tank 11 to flow in the diversion condenser pipe 1002, thereby liquefying and condensing the evaporated single production raw material. This method also utilizes the channels connecting the main circulation pipe 1001 and the inside of the main circulation tank 11 to simultaneously perform circulation condensation. This condensation method is integrated, easy to control, and has a simple structure.

[0045] Working principle: A method for using a processing device for producing dimethylformamide aqueous solvent, comprising the following steps:

[0046] S100: Production Operation: First, the raw materials required for the production of dimethylformamide aqueous solvent, such as formic acid, dimethylamine, and methanol, are sequentially added to the distillation reactor 2 for heating and preparation.

[0047] S200: Overall condensation and liquefaction treatment: By turning on the pump in the pump supply component 6, the coolant is drawn through the pipeline and discharged from the multi-stage distillation structure 3 into the cooling pool tank 4;

[0048] S300: First-stage distillation: The dimethylformamide aqueous solvent prepared is then subjected to first-stage distillation through the distillation function of the distillation reactor 2, so that the unreacted formic acid, dimethylamine and methanol mixed solvent in the dimethylformamide aqueous solvent evaporates into the unreacted spiral pipe 7; the first-stage evaporated mixed gas in the spiral section 7012 is condensed by the cooling liquid;

[0049] S400: Secondary combined processing: The primary evaporation mixed solvent, cooled into liquid, is located within the annular portion 7013. It flows to the uppermost operating chamber via an integrated processing connection pipe, where it is heated by a heating plate 9. The heating plate 9's surface is arranged radially from the center outwards, causing the mixed solvent to flow, and dimethylamine in the mixed solvent vaporizes and rises. The formic acid and methanol mixed solvent flows through a drain hole 903 to the lower manifold chamber and accumulates on the side of the flow collecting plate 803. Simultaneously, it flows to the middle operating chamber via another integrated processing connection pipe. The heating plate 9 at this location heats up, and its surface is arranged radially from the center outwards, causing the formic acid and methanol mixed solvent to flow, and methanol in the mixed solvent vaporizes and rises. The formic acid flows through a drain hole 903 to the lower manifold chamber and accumulates on the side of the flow collecting plate 803. Simultaneously, it flows to the lowermost operating chamber via another integrated processing connection pipe.

[0050] S500: Two-stage combined condensation treatment: Simultaneously, the two-component condenser pipes 1002 simultaneously draw coolant from the end of the main circulation pipe 1001 into the cooling tank 4. The vaporized methanol and dimethylamine are condensed through the two-component condenser pipes 1002 and dripped onto the annular protrusion 801 for collection.

[0051] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A processing apparatus for producing dimethylformamide aqueous solvent, characterized in that, It includes a base (1), a distillation reactor (2), a multi-stage distillation structure (3), and a cooling tank (4); The distillation reactor (2) is arranged on the base (1); The multi-stage distillation structure (3) is arranged on one side of the distillation reactor (2); The cooling tank (4) is arranged on the side of the multi-stage distillation structure (3) away from the distillation reactor (2); and the cooling tank (4) is connected to the input end of the multi-stage distillation structure (3) through a suction circulation pipe (5); and the cooling tank (4) is connected to the output end of the multi-stage distillation structure (3) through a pumping assembly (6). The base (1), distillation reactor (2), multi-stage distillation structure (3), cooling tank (4), suction circulation pipeline (5), and pumping assembly (6) constitute a multi-stage distillation separation structure. The multi-stage distillation structure (3) includes a main circulation tank (11), an unreacted spiral pipe (7), a staged reaction sleeve (8), a heating plate (9), and a condensation pipe (10). The main circulation tank (11) is arranged on one side of the distillation reactor (2); and the internal gap of the main circulation tank (11) forms an integrated condensation chamber. The unreacted spiral pipe (7) is installed inside the main circulation tank (11) and connected to the distillation reactor (2); wherein the distillation gas discharge end of the distillation reactor (2) is connected to the output end of the unreacted spiral pipe (7); The staged reaction sleeve (8) is arranged below the unreacted spiral pipe (7); and the interior of the staged reaction sleeve (8) is arranged with three operating chambers in a vertically spaced manner. The heating plate (9) is arranged in the two operating chambers located opposite each other at the upper end; The condensation pipe (10) passes through the staged reaction sleeve (8); An annular protrusion (801) is fixed inside the two operating cavities located opposite each other at the upper end; wherein, the heating plate (9) is arranged on the annular protrusion (801), and the two operating cavities located opposite each other at the upper end are separated by the gap of the heating plate (9) to form an evaporation cavity and a confluence cavity; The evaporation chamber is located at the high end of the operating chamber; and a downwardly extending conical protrusion (802) is provided at the high end of the evaporation chamber relative to the center of the annular protrusion (801). The manifold is located at the lower end of the operating cavity; and the bottom of the manifold is provided with a flow-diverting and converging plate (803) with an arc-shaped structure, and the flow-diverting and converging plate (803) is high in the middle and low on the sides; The heating plate (9) has an annular structure, and heating wires are uniformly arranged inside the heating plate (9); the inner wall of the heating plate (9) has a number of extended protrusions (902) arranged in an annular shape at equal intervals; the gap between two adjacent extended protrusions (902) and the annular protrusions (801) forms a drain hole (903); the surface of the heating plate (9) is radial from the center outward from high to low, and the upper surface of the heating plate (9) has a number of contact protrusions (901) arranged in an annular shape at equal intervals, the gap between two adjacent contact protrusions (901) forms a guide channel; the guide channel corresponds one-to-one with the drain hole (903), and the guide channel is connected to the confluence cavity through the drain hole (903).

2. The processing equipment for producing dimethylformamide aqueous solvent as described in claim 1, characterized in that, The unreacted spiral pipe (7) is composed of a connecting part (7011), a spiral part (7012), and an annular part (7013); wherein the connecting part (7011), the spiral part (7012), and the annular part (7013) are sequentially connected to the staged reaction sleeve (8).

3. The processing equipment for producing dimethylformamide aqueous solvent as described in claim 2, characterized in that, Each of the operating chambers is provided with an upwardly extending integrated processing connection pipe on its exterior; and the three operating chambers are connected to each other through the integrated processing connection pipe, and one of the operating chambers located at the upper end is connected to the annular part (7013) through the integrated processing connection pipe, wherein the integrated processing connection pipe is provided with a spiral-shaped communication channel inside.

4. The processing equipment for producing dimethylformamide aqueous solvent as described in claim 3, characterized in that, The integrated processing connection pipes are all arranged on the side of the diversion and collection plate (803).

5. The processing equipment for producing dimethylformamide aqueous solvent as described in claim 4, characterized in that, The condensing pipe (10) consists of a main circulation pipe (1001) and a branch condensing pipe (1002). The main circulation pipe (1001) is L-shaped and passes through the staged reaction sleeve (8). The output end of the main circulation pipe (1001) is connected to the pump assembly (6). The two sets of branch condensing pipes (1002) are arranged in sequence in the two operating chambers located at the upper positions. The branch condensing pipe (1002) consists of several sub-connecting pipes distributed in a ring at equal intervals. The shape of the sub-connecting pipes is adapted to the conical protrusion (802). The sub-connecting pipes are connected to the main circulation pipe (1001).

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