Hydrogenation reaction device for producing 5-acetoacetamidobenzimidazolone

Abstract

The utility model relates to a hydrogenation reaction device for producing 5-acetoacetamidobenzimidazolone, which belongs to the technical field of hydrogenation reaction equipment and comprises a reaction kettle body, a stirring shaft, a discharge port, an air outlet hole, a rotary joint, a hydrogen delivery pipe, a hydrogen inlet pipe, a heating jacket, a gas collection cylinder, an exhaust pipe, a circulating gas pump and a circulating gas pipe. The other end of the circulating gas pipe is fixed to the upper end of the hydrogen conveying pipe, valves are arranged on the hydrogen inlet pipe, the exhaust pipe and the circulating gas pipe, a pressure relief pipe is fixed to the side wall of the lower portion of the exhaust pipe, and a pressure relief valve is arranged on the pressure relief pipe. According to the reaction kettle, hydrogen and a solution can be fully mixed, the reaction efficiency is improved, the gas collecting cylinder is arranged at the top of the reaction kettle body, and overflowed hydrogen which is not fully mixed can be collected again and then conveyed into the hydrogen conveying pipe through the circulating gas pump and the circulating gas pipe for circular reaction and mixing, so that the reaction efficiency is improved. Double reaction kettles are not needed, the cost is reduced, and catalyst blockage at the connecting pipe is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of hydrogenation reaction devices for 5-acetyl acetylamino benzimidazolone production, belong to hydrogenation reaction equipment technical field. BACKGROUND

[0002] 5-acetyl acetylamino benzimidazolone is often applied to medicine, pesticide, pigment and special material synthesis field, and also can be used as pigment intermediate in petroleum chemical industry.In 5-acetyl acetylamino benzimidazolone production process, hydrogen is added to react, current hydrogenation reaction device includes two reaction kettles arranged in series up and down, and the upper and lower reaction kettles are connected by communication pipe, which can prolong the residence time of hydrogen in the reaction system, but the setting of double reaction kettles causes high equipment, and it is not convenient to feed, and catalyst is added in the reaction kettle during reaction, and the connecting pipe is prone to catalyst blockage, and the catalyst is not evenly distributed in the upper and lower reaction kettles, which affects the reaction efficiency. SUMMARY

[0003] The utility model provides a kind of hydrogenation reaction devices for 5-acetyl acetylamino benzimidazolone production, solve the problems in the background art.

[0004] The utility model relates to a kind of hydrogenation reaction devices for 5-acetyl acetylamino benzimidazolone production, including reaction kettle body, be equipped with stirring shaft in reaction kettle body, stirring shaft is fixed with stirring rod, stirring shaft is connected with stirring motor, the bottom of reaction kettle body is equipped with discharge port, the lateral wall of stirring rod is evenly equipped with gas hole, the bottom of stirring shaft is fixed with swivel joint, and the gas passage that is connected swivel joint and gas hole is equipped in stirring shaft and stirring rod, the bottom of swivel joint is fixed with hydrogen gas delivery pipe, hydrogen gas delivery pipe is connected with hydrogen gas inlet pipe, the outside of reaction kettle body is equipped with heating jacket, the lower part of heating jacket is connected with steam inlet pipe, the upper part of heating jacket is equipped with steam outlet pipe, the top of reaction kettle body is fixed with gas collecting cylinder, the top of gas collecting cylinder is fixed with exhaust pipe, the other end of exhaust pipe is connected with circulating gas pump, the outlet of circulating gas pump is fixed with circulating gas pipe, the other end of circulating gas pipe is fixed with the upper end of hydrogen gas delivery pipe, valve is equipped on hydrogen gas inlet pipe, exhaust pipe and circulating gas pipe, the lower part of the lateral wall of exhaust pipe is fixed with pressure relief pipe, and pressure relief valve is equipped on pressure relief pipe.

[0005] As a preferred, the outside of discharge port is equipped with support sleeve fixed in the bottom of reaction kettle body, the outside of support sleeve is welded and fixed with evenly distributed ring pipe, the upper part of the lateral wall of evenly distributed ring pipe is evenly equipped with a plurality of steam distribution holes, the lower end of heating jacket is welded and fixed on the lower part of the lateral wall of evenly distributed ring pipe, and steam inlet pipe is welded and fixed on the bottom of evenly distributed ring pipe, the lower end of heating jacket can be conveniently welded and fixed, and the steam entering heating jacket can be evenly distributed through evenly distributed ring pipe, so that heat preservation and heating can be better carried out.

[0006] As a kind of preferred, the bottom of the uniform distribution ring pipe is also fixed with drain pipe, drain pipe is equipped with liquid collecting cylinder, drain valve is equipped on the drain pipe below the liquid collecting cylinder, the inner side of the fixed place of uniform distribution ring pipe and heating jacket is equipped with drain hole for communicating the inner cavity of heating jacket and the inner cavity of uniform distribution ring pipe. Condensate in heating jacket can be discharged better, and steam entering is not hindered.

[0007] As a kind of preferred, the top of steam inlet pipe is above the center point of uniform distribution ring pipe.

[0008] As a kind of preferred, heating jacket is divided into upper jacket and lower jacket, which is convenient for manufacturing, welding gap is arranged at the connecting place of upper jacket and lower jacket, support ring is arranged in the inner side of welding gap and welded to the outside of reactor body, annular water collecting groove is arranged at the top of support ring, a plurality of communication holes are uniformly arranged at the bottom of water collecting groove, support ring can support and fix the connecting place of upper jacket and lower jacket, heating jacket is more firm, and water collecting groove can collect condensate flowing down from the upper part of heating jacket, then discharge downward through communication holes, and communication holes can also transport steam.

[0009] As a kind of preferred, arc-shaped anti-falling groove is arranged on the outer side wall of support ring, the top of anti-falling groove is at the top of the inner side of welding gap, the bottom of anti-falling groove is at the bottom of the inner side of welding gap, welding fixing layer is welded in welding gap and anti-falling groove, the welding place of upper jacket and lower jacket is more firm, and falling is prevented.

[0010] The utility model has the following beneficial effects:

[0011] By setting gas outlet on the stirring rod in reactor body, hydrogen gas can be fully mixed with solution by rotating and spraying hydrogen gas into hydrogen gas inlet pipe through gas outlet, reaction efficiency is improved, the top of reactor body is provided with gas collecting cylinder, hydrogen gas overflowing without being fully mixed can be collected and then transported into hydrogen gas delivery pipe through circulating gas pump and circulating gas pipe for circulating reaction and mixing, double reactor is not needed, cost is reduced, and catalyst blockage at connecting pipe is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is structure schematic diagram of the utility model;

[0013] Figure 2 It is Figure 1 Partial structure schematic diagram Figure 1 ;

[0014] Figure 3 It is Figure 1 Partial structure schematic diagram Figure 2 ;

[0015] Figure 4 For Figure 1 Enlarged structural schematic view at A in the figure;

[0016] In the figure: 1, stirring motor; 2, reaction kettle body; 3, pressure relief valve; 4, exhaust pipe; 5, circulating gas pump; 6, circulating gas pipe; 7, hydrogen inlet pipe; 8, hydrogen delivery pipe; 9, welding fixed layer; 10, support ring; 11, rotary joint; 12, liquid discharge hole; 13, liquid discharge pipe; 14, liquid collecting cylinder; 15, uniformly distributed ring pipe; 16, steam inlet pipe; 17, steam distribution hole; 18, stirring shaft; 19, gas outlet hole; 20, anti-falling groove; 21, steam outlet pipe; 22, heating jacket; 23, gas collecting cylinder; 24, communication hole; 25, support sleeve. DETAILED DESCRIPTION

[0017] The utility model will be further described below in combination with examples.

[0018] Example one, as Figures 1 to 4 shown, the utility model discloses a hydrogenation reaction device for 5-acetyl acetylamino benzimidazolone production, including reaction kettle body 2, be equipped with stirring shaft 18 in reaction kettle body 2, stirring shaft 18 is fixed with stirring rod, stirring shaft 18 is connected with stirring motor 1, and the bottom of reaction kettle body 2 is equipped with discharge port, and the lateral wall of stirring rod is uniformly equipped with gas outlet hole 19, and the bottom of stirring shaft 18 is fixed with rotary joint 11, and the gas passage that is equipped with communication rotary joint 11 and gas outlet hole 19 in stirring shaft 18 and stirring rod, the bottom of rotary joint 11 is fixed with hydrogen delivery pipe 8, hydrogen delivery pipe 8 is connected with hydrogen inlet pipe 7, hydrogen inlet pipe 7 is connected with high-pressure hydrogen source, such as high-pressure hydrogen cylinder or high-pressure gas pump of delivery hydrogen, and the outside of reaction kettle body 2 is equipped with heating jacket 22, and the lower part of heating jacket 22 is connected with steam inlet pipe 16, and the upper part of heating jacket 22 is equipped with steam outlet pipe 21, and the top of reaction kettle body 2 is fixed with gas collecting cylinder 23, and the top of gas collecting cylinder 23 is fixed with exhaust pipe 4, and one end of exhaust pipe 4 is connected with circulating gas pump 5, and the outlet of circulating gas pump 5 is fixed with circulating gas pipe 6, and the other end of circulating gas pipe 6 is fixed with the upper end of hydrogen delivery pipe 8, and valve is equipped on hydrogen inlet pipe 7, exhaust pipe 4 and circulating gas pipe 6, and the lower lateral wall of exhaust pipe 4 is fixed with pressure relief pipe, and pressure relief valve 3 is equipped on pressure relief pipe. The discharge port is connected with discharge pipe through flange, and valve is equipped on discharge pipe.

[0019] In use, the 5-nitrobenzimidazolone, anhydrous ethanol catalyst is put into the manhole of the reaction kettle body 2 according to the weight ratio, then the manhole is closed, then the stirring motor 1 is started, then the valves on the hydrogen inlet pipe 7, exhaust pipe 4 and circulating gas pipe 6 are opened, hydrogen enters from the hydrogen inlet pipe 7, then rotates and sprays from the gas outlet hole 19 through the hydrogen conveying pipe 8, the rotary joint 11 and the gas channel, mixes with the liquid in the reaction kettle body 2, and carries out reduction reaction, the hydrogen that is not mixed in time is discharged from the liquid, then enters the gas collecting cylinder 23, then enters the circulating gas pump 5 through the exhaust pipe 4, and then is conveyed to the hydrogen conveying pipe 8 through the circulating gas pipe 6 to carry out the mixing reaction again, the valve on the hydrogen inlet pipe 7 is closed after a period of time, and when the reaction is completed, the valves on the exhaust pipe 4 and the circulating gas pipe 6 are closed, then the pressure relief valve 3 is opened for pressure relief, and then the solution in the reaction kettle body 2 is discharged from the discharge port.

[0020] In example two, on the basis of example one, the outer side of the discharge port is provided with a support sleeve 25 fixed on the bottom of the reaction kettle body 2, a uniformly distributed ring pipe 15 is welded and fixed on the outer side of the support sleeve 25, a plurality of steam distribution holes 17 are uniformly arranged on the upper outer side wall of the uniformly distributed ring pipe 15, the lower end of the heating jacket 22 is welded and fixed on the lower outer side wall of the uniformly distributed ring pipe 15, and the steam inlet pipe 16 is welded and fixed on the bottom of the uniformly distributed ring pipe 15. The reaction kettle body 2 is provided with a temperature sensor.

[0021] The bottom of the uniformly distributed ring pipe 15 is also fixed with a liquid discharge pipe 13, the liquid discharge pipe 13 is provided with a liquid collecting cylinder 14, the liquid discharge pipe 13 below the liquid collecting cylinder 14 is provided with a liquid discharge valve, and the inner side of the uniformly distributed ring pipe 15 and the heating jacket 22 fixed part is provided with a liquid discharge hole 12 communicating the inner cavity of the heating jacket 22 and the inner cavity of the uniformly distributed ring pipe 15.

[0022] The top of the steam inlet pipe 16 is above the center point of the uniformly distributed ring pipe 15. Before work, the liquid discharge valve on the liquid discharge pipe 13 is opened to discharge the collected condensate, and the liquid discharge valve is closed after the liquid is discharged. During the reaction, the valve on the steam inlet pipe 16 is opened, steam enters the uniformly distributed ring pipe 15, then uniformly distributes in the lower part of the inner cavity of the heating jacket 22 from the steam distribution holes 17, and then the steam heats and keeps warm the reaction kettle body 2.

[0023] The heating jacket 22 is divided into an upper jacket and a lower jacket, the connection part of the upper jacket and the lower jacket is provided with a welded gap, the inner side of the welded gap is provided with a support ring 10 welded and fixed on the outside of the reaction kettle body 2, the top of the support ring 10 is provided with a ring-shaped water collecting groove, and the bottom of the water collecting groove is uniformly provided with a plurality of communication holes 24.

[0024] The outer side wall of the support ring 10 is provided with a circular-arc-shaped anti-falling groove 20, the top of the anti-falling groove 20 is at the top inside the welding gap, the bottom of the anti-falling groove 20 is at the bottom inside the welding gap, and the welding gap and the anti-falling groove 20 are both welded with a welding fixed layer 9.

[0025] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0026] In the description of the present application, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and do not require the present application to be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application.

Claims

1. 5-Acetyl acetylamino benzimidazolone production hydrogenation reaction device, comprising a reaction kettle body (2), a stirring shaft (18) is arranged in the reaction kettle body (2), a stirring rod is fixed on the stirring shaft (18), a stirring motor (1) is connected with the stirring shaft (18), a discharge port is arranged at the bottom of the reaction kettle body (2), a plurality of gas outlets (19) are uniformly arranged on the side wall of the stirring rod, a rotary joint (11) is fixed at the bottom of the stirring shaft (18), and a gas channel is arranged in the stirring shaft (18) and the stirring rod and communicates the rotary joint (11) and the gas outlet (19), characterized in that: The bottom of the rotary joint (11) is fixed with a hydrogen delivery pipe (8), the hydrogen delivery pipe (8) is connected with a hydrogen inlet pipe (7), the outside of the reaction kettle body (2) is provided with a heating jacket (22), the lower part of the heating jacket (22) is connected with a steam inlet pipe (16), the upper part of the heating jacket (22) is provided with a steam outlet pipe (21), the top of the reaction kettle body (2) is fixed with a gas collecting cylinder (23), the top of the gas collecting cylinder (23) is fixed with an exhaust pipe (4), the other end of the exhaust pipe (4) is connected with a circulating gas pump (5), the outlet of the circulating gas pump (5) is fixed with a circulating gas pipe (6), the other end of the circulating gas pipe (6) is fixed with the upper end of the hydrogen delivery pipe (8), the hydrogen inlet pipe (7), the exhaust pipe (4) and the circulating gas pipe (6) are all provided with valves, the lower part of the exhaust pipe (4) is fixed with a pressure relief pipe on the side wall, and the pressure relief pipe is provided with a pressure relief valve (3).

2. The hydrogenation reaction apparatus for producing 5-acetylacetamidobenzimidazolone according to claim 1, characterized by: The outside of the discharge port is provided with a support sleeve (25) fixed on the bottom of the reaction kettle body (2), the outer side of the support sleeve (25) is welded and fixed with a uniformly distributed ring pipe (15), a plurality of steam distribution holes (17) are uniformly arranged on the outer side wall of the upper part of the uniformly distributed ring pipe (15), the lower end of the heating jacket (22) is welded and fixed on the outer side wall of the lower part of the uniformly distributed ring pipe (15), and the steam inlet pipe (16) is welded and fixed on the bottom of the uniformly distributed ring pipe (15).

3. The hydrogenation reaction apparatus for producing 5-acetylacetamidobenzimidazolone according to claim 2, characterized by: The bottom of the uniformly distributed ring pipe (15) is also fixed with a drain pipe (13), the drain pipe (13) is provided with a liquid collecting cylinder (14), the drain pipe (13) below the liquid collecting cylinder (14) is provided with a drain valve, and the inner side of the fixing position of the uniformly distributed ring pipe (15) and the heating jacket (22) is provided with a drain hole (12) communicating the inner cavity of the heating jacket (22) and the inner cavity of the uniformly distributed ring pipe (15).

4. The hydrogenation reaction apparatus for producing 5-acetylacetamidobenzimidazolone according to claim 3, characterized by: The top of the steam inlet pipe (16) is above the center point of the uniformly distributed ring pipe (15).

5. The hydrogenation reaction apparatus for 5-acetylacetamidobenzimidazolone production according to claim 1, characterized by: The heating jacket (22) is divided into an upper jacket and a lower jacket, a welding gap is arranged at the connection position of the upper jacket and the lower jacket, a support ring (10) is welded and fixed on the outside of the reaction kettle body (2) at the inner side of the welding gap, a ring-shaped water collecting groove is arranged at the top of the support ring (10), and a plurality of communication holes (24) are uniformly arranged at the bottom of the water collecting groove.

6. The hydrogenation reaction apparatus for producing 5-acetylacetamidobenzimidazolone according to claim 5, characterized by: An arc-shaped anti-falling groove (20) is arranged on the outer side wall of the support ring (10), the top of the anti-falling groove (20) is at the top of the inner side of the welding gap, the bottom of the anti-falling groove (20) is at the bottom of the inner side of the welding gap, and a welding fixed layer (9) is welded in the welding gap and the anti-falling groove (20).

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