Reaction kettle for furfural production

Abstract

The utility model discloses a reaction kettle for furfural production, which relates to the technical field of furfural production and comprises a reaction kettle body, an electric heating plate arranged at the bottom end in the reaction kettle body, feed pipes symmetrically fixed at the top end of the reaction kettle body, and a discharge pipe fixed at the bottom end of the reaction kettle body. According to the reaction kettle disclosed by the utility model, the two groups of symmetrically distributed stirring mechanisms in the reaction kettle body are driven by the motor to synchronously stir furfural reaction liquid, so that the furfural reaction liquid is fully and efficiently mixed and stirred, and the production efficiency of furfural is improved to a certain extent; a cavity used for circulation of cooling liquid is formed in the side wall of the reaction kettle body, a steam coil used for circulation of high-temperature steam is arranged in the cavity, and meanwhile, the temperature in the reaction kettle body is detected through a temperature sensor, so that the temperature in the reaction kettle body can be adaptively and rapidly adjusted; and the reaction in the reaction kettle body can be always carried out at the optimal temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of furfural production, in particular to a reaction kettle for furfural production. Background Art

[0002] Furfural is an organic compound, a colorless, transparent, oily liquid with a special smell similar to benzaldehyde. It is mainly used as an industrial solvent. The production history of furfural can be traced back to the early 20th century. The industrial production process of furfural is an intermittent production process involving equipment such as pretreatment reactors, hydrolysis reactors and azeotropic distillation towers. The existing reactor for furfural production usually includes a reactor body with a stirring paddle inside, which is driven by a stirring motor.

[0003] For example, the utility model patent with application number 202210273844.8 discloses a reactor for furfural production, including a reactor body, wherein a stirring paddle is provided in the reactor body, and the stirring paddle is driven by a stirring motor; the reactor body also includes a reactor cover, an upper reactor body and a lower reactor body, the upper reactor body and the lower reactor body are connected by fixing bolts, the reactor cover is provided with a feed port and an exhaust port, and the lower reactor body is arranged on a support.

[0004] Based on the findings in the prior art, most of the existing furfural production reactors have a single structure, which is not convenient for adaptively and quickly adjusting the temperature in the reactor according to actual production needs, so that the reaction cannot always be maintained at the optimal temperature. In addition, the stirring efficiency of the agitator of the existing furfural production reactor is low, and the reaction liquid cannot be fully and efficiently stirred, which reduces the production efficiency of furfural to a certain extent and is not practical. Therefore, the utility model proposes a furfural production reactor to solve the problems existing in the prior art. Utility Model Content

[0005] In view of the above problems, the purpose of the utility model is to propose a reactor for furfural production, so as to solve the problems that the existing reactor for furfural production is not convenient for adaptively and quickly adjusting the temperature inside the reactor according to actual production needs, and the stirring efficiency of the agitator is low, which reduces the production efficiency of furfural to a certain extent.

[0006] In order to achieve the purpose of the utility model, the utility model is implemented through the following technical scheme: a reactor for furfural production, including a reactor body, the bottom end of the reactor body is equipped with an electric heating plate, the top of the reactor body is symmetrically fixed with a feed pipe, the bottom end of the reactor body is fixed with a discharge pipe, the reactor body is symmetrically provided with a stirring mechanism driven to rotate by a motor, a cavity is opened in the side wall of the reactor body, and the two side walls of the reactor body are respectively fixed with a water inlet pipe and a water outlet pipe connected to the cavity, a steam coil with a ring-shaped winding design is provided in the cavity, and the two side walls of the reactor body are respectively fixed with an air inlet pipe and an air outlet pipe connected to the steam coil.

[0007] Further improvements are: a temperature sensor and a pH sensor are respectively fixed to the lower part of the inner walls on both sides of the reactor body, a temperature display screen electrically connected to the temperature sensor is fixed to the outer wall of the reactor body, an alkali solution storage box is fixed to the top of the reactor body, and a liquid pump electrically connected to the pH sensor is connected to the bottom of the alkali solution storage box, and the liquid outlet of the liquid pump passes through the interior of the reactor body.

[0008] A further improvement is that a pressure sensor is fixed to the top of the reactor body, a pressure relief safety valve is fixed to the side of the top of the reactor body away from the alkali solution storage tank, and the pressure sensor is electrically connected to the pressure relief safety valve.

[0009] A further improvement is that the stirring mechanism comprises a stirring shaft rotatably connected to the top of the interior of the reactor body and stirring blades symmetrically fixed on the stirring shaft, and the two groups of stirring blades on the stirring shaft are staggered.

[0010] A further improvement is that a drive box is fixed to the top of the reactor body, the output end of the motor passes through the drive box through a sealed bearing and is fixed with a driving gear, and the top ends of the two sets of stirring shafts pass through the drive box through sealed bearings and are fixed with a driven gear meshing with the driving gear.

[0011] A further improvement is that the reactor body comprises a reactor body and a reactor cover fixed to the top of the reactor body by bolts, a sealing ring is fixed to the bottom of the reactor cover, and a sealing groove adapted to the sealing ring is provided at the top of the reactor body.

[0012] A further improvement is that: a heat insulating layer fixed in the side wall of the reactor body is provided around the cavity, a support column is fixed at the bottom end of the reactor body, and the support column is fixed to the ground by bolts.

[0013] The beneficial effects of the utility model are as follows: the utility model comprises a reactor body, and two groups of symmetrically distributed stirring mechanisms inside the reactor body are driven by a motor to synchronously stir the furfural reaction liquid, so that the furfural reaction liquid is fully and efficiently mixed and stirred, thereby improving the production efficiency of furfural to a certain extent, and by opening a cavity for the circulation of cooling liquid in the side wall of the reactor body, and arranging a steam coil for the circulation of high-temperature steam in the cavity, and at the same time detecting the temperature in the reactor body by a temperature sensor, the temperature in the reactor body can be adaptively and quickly adjusted, so that the reaction in the reactor body can always be maintained at the optimal temperature, it is easy to use, and the stability of the reaction is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of the utility model;

[0015] Figure 2 It is a front sectional view of the utility model;

[0016] Figure 3 This utility model Figure 2 A in the enlarged view;

[0017] Figure 4 It is a top view of the kettle cover of the utility model.

[0018] Among them: 1. Reactor body; 2. Feed pipe; 3. Discharge pipe; 4. Motor; 5. Cavity; 6. Water inlet pipe; 7. Water outlet pipe; 8. Steam coil; 9. Air inlet pipe; 10. Air outlet pipe; 11. Temperature sensor; 12. pH sensor; 13. Temperature display screen; 14. Alkali liquid storage box; 15. Liquid pump; 16. Pressure sensor; 17. Pressure relief safety valve; 18. Stirring shaft; 19. Stirring blade; 20. Drive box; 21. Driving gear; 22. Driven gear; 23. Insulation layer; 24. Support column; 101. Reactor body; 102. Reactor cover; 103. Sealing ring. DETAILED DESCRIPTION

[0019] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0020] according to Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the present embodiment provides a reactor for furfural production, comprising a reactor body 1 for furfural production reaction and a feed pipe 2 symmetrically fixed to the top of the reactor body 1, the feed pipe 2 is used to add raw materials for furfural production reaction into the reactor body 1, the bottom end of the reactor body 1 is equipped with an electric heating plate for heating the reaction liquid, a discharge pipe 3 with a control valve is fixed at the center of the bottom end of the reactor body 1, and is used to discharge the furfural solution after the production reaction, stirring mechanisms for mixing and stirring the reaction liquid are arranged on the left and right sides of the reactor body 1, and the two groups of stirring mechanisms are driven to rotate by the motor 4 at the top of the reactor body 1, and the two groups of symmetrically distributed stirring mechanisms inside the reactor body 1 are driven by the motor 4 to synchronously stir the furfural reaction liquid, so that the furfural reaction liquid is fully and efficiently mixed and stirred, thereby improving the production efficiency of furfural to a certain extent, a cavity 5 for accommodating coolant is opened in the side wall of the reactor body 1, and a water inlet pipe 6 connected to the cavity 5 is fixed on the upper part of the right side wall of the reactor body 1, and the water inlet pipe 6 is connected to the external cooling water supply device, and the reactor body 1 is provided with a cooling water supply device. A water outlet pipe 7 connected to the cavity 5 is fixed at the lower part of the left side wall of the reactor body 1, and the water outlet pipe 7 is connected to the external cooling water recovery device. A steam coil 8 with a ring-shaped winding design and used for high-temperature steam circulation is arranged in the cavity 5. An air inlet pipe 9 connected to the steam coil 8 is fixed to the upper part of the left side wall of the reactor body 1, and the air inlet pipe 9 is connected to the external steam generating device. An air outlet pipe 10 connected to the steam coil 8 is fixed to the lower part of the right side wall of the reactor body 1, and the air outlet pipe 10 is connected to the external steam recovery device. The left inner wall of the reactor body 1 A temperature sensor 11 is fixed to the lower part, and a temperature display screen 13 is fixed to the outer wall of the reactor body 1. The temperature sensor 11 is connected to the PLC control system of the reactor and is used to display the detected temperature on the temperature display screen 13. A cavity 5 for the circulation of coolant is opened in the side wall of the reactor body 1, and a steam coil 8 for the circulation of high-temperature steam is arranged in the cavity 5. At the same time, the temperature in the reactor body 1 is detected by the temperature sensor 11, so that the temperature in the reactor body 1 can be adaptively and quickly adjusted.

[0021] A pH sensor 12 is fixed to the lower part of the right inner wall of the reactor body 1, and an alkali liquid storage box 14 for storing alkali liquid is fixed to the front side of the top of the reactor body 1. A liquid pump 15 is connected to the bottom of the alkali liquid storage box 14, and the liquid outlet of the liquid pump 15 penetrates into the reactor body 1. The pH sensor 12 is connected to the PLC control system of the reactor, and is used to drive the liquid pump 15 to work when the pH value of the reaction liquid is detected to be too low, and inject the alkali liquid in the alkali liquid storage box 14 into the reactor body 1 to ensure that the reaction is carried out in a suitable alkaline environment. A pressure sensor 16 for detecting the internal pressure of the reactor body 1 is fixed to the top of the reactor body 1 by bolts, and a pressure relief safety valve 17 is fixed to the rear side of the top of the reactor body 1. The pressure sensor 16 is connected to the PLC control system of the reactor, and is used to drive the pressure relief safety valve 17 to relieve pressure when the pressure inside the reactor body 1 is detected to be too high, so as to ensure safety.

[0022] The stirring mechanism includes a stirring shaft 18 and stirring blades 19, wherein the stirring shaft 18 is rotatably connected to the top of the reactor body 1, and the stirring blades 19 are symmetrically fixed on the stirring shaft 18. The stirring blades 19 on the two groups of stirring shafts 18 are staggered to avoid mutual interference and achieve full stirring. A driving box 20 is fixed on the top of the reactor body 1, and the output end shaft of the motor 4 passes through the driving box 20 through a sealed bearing and is fixed with a driving gear 21. The tops of the two groups of stirring shafts 18 are both passed through the driving box 20 through a sealed bearing and are fixed with a driven gear 22, and the two groups of driven gears 22 are respectively meshed and connected to the left and right sides of the driving gear 21. The driving gear 21 is driven to rotate by the motor 4, and the driving gear 21 then drives the meshed driven gear 22 to rotate, thereby driving the two groups of stirring shafts 18 to rotate synchronously, thereby achieving full and efficient stirring of the reaction liquid by the two groups of stirring mechanisms.

[0023] The reactor body 1 is composed of a reactor body 101 and a reactor cover 102, wherein the reactor cover 102 is fixed to the top of the reactor body 101 by bolts, a sealing ring 103 is fixed to the bottom of the reactor cover 102, and a sealing groove adapted to the sealing ring 103 is opened at the top of the reactor body 101. When the reactor cover 102 is covered on the top of the reactor body 101, the sealing ring 103 is embedded in the sealing groove to achieve a sealed connection between the reactor body 101 and the reactor cover 102.

[0024] An insulating layer 23 is provided on the periphery of the cavity 5, and the insulating layer 23 is fixed in the side wall of the reactor body 1 to play a role in heat insulation. A symmetrically distributed support column 24 is welded and fixed to the bottom end of the reactor body 1, and the support column 24 is fixed to the ground by bolts to provide stable support for the reactor body 1.

[0025] In the process of furfural production by the furfural production reactor, the raw materials for furfural production are added into the reactor body 1 through the feed pipe 2, and heated by the electric heating plate at the bottom of the reactor body 1, and then the motor 4 is started to drive the two groups of stirring mechanisms to synchronously and efficiently stir the raw materials in the reactor body 1, and at the same time, the temperature of the furfural solution in the reactor body 1 is detected by the temperature sensor 11. When it is detected that the temperature is too high, the water inlet pipe 6 is connected to the external cooling water supply device, and the water outlet pipe 7 is connected to the external cooling water recovery device, and the external cooling water is continuously injected into the cavity 5 and continuously discharged from the water outlet pipe 7. The reactor body 1 is rapidly cooled down until the temperature sensor 11 detects that the temperature of the furfural solution inside the reactor body 1 reaches a preset range. When the temperature is detected to be too low, the air inlet pipe 9 is connected to an external steam generating device, and the air outlet pipe 10 is connected to an external steam recovery device. High-temperature steam is continuously injected into the steam coil 8 through the air inlet pipe 9 (at this time, the cooling water in the cavity 5 is completely discharged), and the steam is discharged through the air outlet pipe 10, so as to achieve rapid heating of the reactor body 1 until the temperature sensor 11 detects that the temperature of the furfural solution inside the reactor body 1 reaches a preset range, thereby completing rapid adjustment of the temperature inside the reactor body 1.

[0026] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A reactor for furfural production, comprising a reactor body (1), characterized in that: The bottom end of the reactor body (1) is provided with an electric heating plate, a feed pipe (2) is symmetrically fixed to the top end of the reactor body (1), a discharge pipe (3) is fixed to the bottom end of the reactor body (1), a stirring mechanism driven to rotate by a motor (4) is symmetrically arranged inside the reactor body (1), a cavity (5) is opened in the side wall of the reactor body (1), a water inlet pipe (6) and a water outlet pipe (7) connected to the cavity (5) are respectively fixed to the two side walls of the reactor body (1), a steam coil (8) in a ring-shaped winding design is arranged in the cavity (5), and an air inlet pipe (9) and an air outlet pipe (10) connected to the steam coil (8) are respectively fixed to the two side walls of the reactor body (1).

2. A reactor for furfural production according to claim 1, characterized in that: A temperature sensor (11) and a pH sensor (12) are fixed to the lower parts of the inner walls on both sides of the reactor body (1), a temperature display screen (13) electrically connected to the temperature sensor (11) is fixed to the outer wall of the reactor body (1), an alkali liquid storage box (14) is fixed to the top of the reactor body (1), a liquid pump (15) electrically connected to the pH sensor (12) is connected to the bottom of the alkali liquid storage box (14), and a liquid outlet of the liquid pump (15) penetrates into the interior of the reactor body (1).

3. A furfural production reactor according to claim 2, characterized in that: A pressure sensor (16) is fixed to the top of the reactor body (1), and a pressure relief safety valve (17) is fixed to the side of the top of the reactor body (1) away from the alkali solution storage tank (14), and the pressure sensor (16) is electrically connected to the pressure relief safety valve (17).

4. A furfural production reactor according to claim 1, characterized in that: The stirring mechanism comprises a stirring shaft (18) rotatably connected to the top of the reactor body (1) and stirring blades (19) symmetrically fixed on the stirring shaft (18), and the two groups of stirring blades (19) on the stirring shaft (18) are staggered.

5. A reactor for furfural production according to claim 4, characterized in that: A driving box (20) is fixed at the top of the reactor body (1); the output end of the motor (4) passes through the driving box (20) through a sealed bearing and is fixed with a driving gear (21); the top ends of the two groups of stirring shafts (18) pass through the driving box (20) through sealed bearings and are fixed with a driven gear (22) meshing with the driving gear (21).

6. A reactor for furfural production according to claim 1, characterized in that: The reactor body (1) comprises a reactor body (101) and a reactor cover (102) fixed to the top of the reactor body (101) by bolts, a sealing ring (103) is fixed to the bottom of the reactor cover (102), and a sealing groove adapted to the sealing ring (103) is provided at the top of the reactor body (101).

7. A reactor for furfural production according to claim 1, characterized in that: The outer periphery of the cavity (5) is provided with a heat insulation layer (23) fixed in the side wall of the reactor body (1); a support column (24) is fixed at the bottom end of the reactor body (1); and the support column (24) is fixed to the ground by bolts.

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