Ventilation type reaction kettle

Abstract

The utility model provides a ventilation type reaction kettle, which belongs to the technical field of chemical equipment and comprises a kettle body, a stirring device and a mixing chamber, the stirring device comprises a driving mechanism arranged outside the kettle body and a stirrer arranged in the kettle body; the stirrer comprises a double-horn type shaft body, a plurality of self-suction paddles, a stirring wheel and an impeller; after the gas is introduced into the mixing chamber of the reaction kettle, the gas and the liquid are subjected to preliminary mixing reaction in the mixing chamber, and the unreacted gas after preliminary mixing is brought to the center of the kettle body under the action of the stirrer and is further dispersed in the whole reaction system to be subjected to secondary mixing reaction with the liquid; and after the secondary mixing, the unreacted gas is mixed and reacted with the liquid under the action of the stirrer and then is emptied. According to the ventilation type reaction kettle provided by the utility model, gas introduced into the kettle body can be circulated back and forth in the reaction kettle for multiple times and is continuously contacted and collided with materials in the reaction kettle for reaction, so that the mixing degree of gas-liquid two-phase materials is enhanced, and the problem of low utilization rate of the introduced gas is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical industry, and in particular relates to a ventilated reaction kettle. Background Art

[0002] In heterogeneous reaction systems, common types include liquid-liquid reactions, solid-liquid reactions, and gas-liquid reactions. For the first two reaction types, conventional stirring devices can meet the mixing intensity requirements of the reactant system; while for the latter gas-liquid reaction, due to the short contact time between the gas and liquid phases and the high airtightness requirements of the reaction vessel, in actual production equipment, it is necessary to add specific containers in the reactor to achieve as uniform mixing of the gas and liquid phases as possible.

[0003] The existing technical means is to extend the gas ventilation pipe into the reactor material through the gas distributor device, and rely on gas injection to improve the gas-liquid mixing effect. It is difficult to ensure that the gas and the material react fully, the mixing effect is poor, the gas loss is large, the gas utilization rate is seriously reduced, and a huge production load is brought to a series of work sections such as subsequent exhaust gas treatment. Utility Model Content

[0004] The embodiment of the utility model provides a ventilated reactor, which allows the introduced gas to be rotationally dispersed between the liquid material system and form two gas circulation fields inside the reactor, thereby enhancing the mixing intensity between the gas-liquid two-phase materials and solving the problem of low gas utilization.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a ventilated reactor, comprising:

[0006] The kettle body is provided with an exhaust port at the top and an air inlet at the bottom;

[0007] A stirring device, comprising a driving mechanism arranged outside the kettle body and a stirrer arranged inside the kettle body; the stirrer comprises a double-trumpet shaft body, a plurality of self-priming paddles, a stirring wheel and an impeller; the main shaft of the driving mechanism is connected to the lower end of the double-trumpet shaft body through a driving shaft, and the driving shaft is coaxial with the rotation axis of the double-trumpet shaft body; the self-priming paddle is connected to the double-trumpet shaft body along the radial center line of the middle part of the double-trumpet shaft body, and the double-trumpet shaft body is provided with a vent hole; the impeller is arranged on the upper end of the double-trumpet shaft body; and

[0008] A mixing chamber is arranged at the lower end of the double-horn shaft body; a vent pipe connected to the air inlet is arranged on the radial side of the mixing chamber, and the stirring wheel is arranged in the mixing chamber and connected to the driving shaft;

[0009] The gas and liquid entering the mixing chamber are mixed and reacted for the first time, and the unreacted gas enters the double-trumpet-type shaft body under the drive of the stirring wheel, is discharged through the lower air vent of the double-trumpet-type shaft body, and then returns to the double-trumpet-type shaft body through the self-priming paddle, forming a primary gas circulation field; the gas that has not reacted yet enters the upper part of the double-trumpet-type shaft body under the drive of the impeller airflow and the suction of the self-priming paddle, and is discharged through the upper air vent of the double-trumpet-type shaft body, forming a secondary gas circulation field.

[0010] In one feasible manner, the double-horn type shaft body has an upper horn body, a waisted connecting section and a lower horn body which are sequentially connected from top to bottom, the drive shaft is connected to the lower end of the lower horn body, the self-priming paddles are evenly distributed on the waisted connecting section along the circumferential direction, the upper horn body is provided with an upper air vent, and the lower horn body is provided with a lower air vent; the impeller is provided at the upper end of the upper horn body.

[0011] In one feasible manner, the upper air vents of the upper horn body are arranged in multiple circles from top to bottom, and the upper air vents of each circle are evenly distributed along the circumferential direction of the upper horn body; the lower air vents on the lower horn body and the upper air vents on the upper horn body are symmetrically distributed along the radial center line.

[0012] In one achievable manner, a cover plate is provided at the upper end of the upper horn body, and the impeller is fixed on the lower surface of the cover plate.

[0013] In one achievable manner, the cover plate is a spherical cover plate that protrudes upward.

[0014] In one achievable manner, a shaft bottom is provided at the lower end of the lower horn body, and the drive shaft is fixed to the center of the shaft bottom.

[0015] In one practicable manner, the shaft bottom is formed in a conical shape.

[0016] In one feasible manner, one end of the self-priming paddle extends into the double-trumpet shaft body, and the other end is located outside the double-trumpet shaft body. The self-priming paddle includes a connecting pipe that passes through the double-trumpet shaft body and tubular blades arranged at both ends of the connecting pipe. The tubular blades are provided with a plurality of vents connected to the central cavity of the self-priming paddle.

[0017] In one achievable manner, the vent is in a spiral shape.

[0018] In one achievable manner, the radially outward extending length of the self-priming propeller is flush with the radial maximum width of the double-trumpet-type shaft body.

[0019] Compared with the prior art, the ventilated reactor provided by the utility model has the following beneficial effects: the reaction gas enters the mixing chamber through the vent pipe, and under the drive of the driving mechanism, the stirring wheel at the bottom of the mixing chamber quickly mixes the gas and liquid in the mixing chamber, and the unreacted gas after mixing is brought into the hollow cavity of the double-trumpet-type shaft body by the rotating force of the stirring wheel blades and the driving force of the upward movement of the bottom gas, and then moves to the outside of the double-trumpet-type shaft body along the vent holes arranged on the double-trumpet-type shaft body, and the unreacted gas is discharged through the outside of the self-priming paddle under the rotation of the self-priming paddle installed on the double-trumpet-type shaft body. The unreacted gas dispersed in the reaction system again is brought to the hollow cavity of the double-trumpet type shaft body by the rotation force of the impeller blades at the upper end of the double-trumpet type shaft body and the attraction of the self-priming paddle, and then moves along the air holes arranged on the double-trumpet type shaft body to the outside of the double-trumpet type shaft body to form a secondary gas circulation field. Finally, the unreacted gas enters the subsequent tail gas absorption device through the exhaust port above the kettle body.

[0020] The ventilated reactor provided by the utility model has a simple structure and is easy to control. It not only enhances the mixing intensity between the gas and liquid phases, but also realizes multiple recycling of the gas, improves the effect of full reaction of the gas and the material, reduces the gas loss, improves the gas utilization efficiency, and reduces the production load caused to a series of work sections such as subsequent exhaust gas disposal. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a ventilated reactor provided in an embodiment of the utility model;

[0022] Figure 2 A schematic diagram of the structure of the vent of the self-priming paddle provided in an embodiment of the utility model;

[0023] Description of reference numerals:

[0024] 1. Head; 2. Base; 3. Cylinder; 4. Exhaust port; 5. Air inlet; 6. Vent pipe; 7. Stirring device; 8. Double-trumpet shaft; 9. Shaft bottom; 10. Self-priming paddle; 101. Connecting pipe; 102. Paddle blade; 11. Cover plate; 12. Upper vent hole; 13. Mixing chamber; 14. Air inlet; 15. Driving mechanism; 16. Driving shaft; 17. Impeller; 18. Stirring wheel; 19. Vent hole; 20. Lower vent hole. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] Unless otherwise expressly defined, the terms and directional words in the claims, specification and the above-mentioned drawings of the present utility model, such as the use of terms such as "upper", "lower", "length", "width", "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "high", "low", "axial", "radial", "circumferential" and the like to indicate directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the present invention.

[0027] Please also read Figure 1 and Figure 2 , the ventilated reactor provided by the utility model is now described. The ventilated reactor comprises a reactor body, a stirring device 7 and a mixing chamber 13. An exhaust port 4 is arranged on the top of the reactor body, and an air inlet 5 is arranged on the lower part; the reactor body is used to contain the liquid to be reacted, and comprises a head 1, a base 2 and a cylinder 3. The head 1 is a semi-elliptical structure, and an exhaust port 4 is opened on the head 1 for discharging the final unreacted gas, wherein the subsequent exhaust gas treatment device is connected to the exhaust port 4 through a pipeline; the base 2 is a circular flat bottom, and the cylinder 3 is a cylindrical cylinder 3. Preferably, the exhaust port 4 is located in the middle of the head 1, and is connected to the head 1 by sealing welding. The number is 1, and the diameter is 50mm.

[0028] The stirring device 7 is used to enhance the mixing and mass transfer effect between the liquid to be reacted and the gas passed in the kettle body, and accelerate the reaction between the two; the stirring device 7 includes a driving mechanism 15 arranged outside the kettle body and an agitator arranged in the kettle body; the agitator includes a double-trumpet shaft body 8, a plurality of self-priming paddles 10, a stirring wheel 18 and an impeller 17; the main shaft of the driving mechanism 15 is connected to the lower end of the double-trumpet shaft body 8 through a driving shaft 16, and the driving shaft 16 is coaxial with the rotation axis of the double-trumpet shaft body 8; the self-priming paddle 10 is connected to the double-trumpet shaft body 8 along the radial center line of the middle part of the double-trumpet shaft body 8, and the double-trumpet shaft body 8 is provided with a vent hole; the impeller 17 is arranged at the upper end of the double-trumpet shaft body 8; the driving mechanism 15 is used to drive the agitator to rotate, and includes a driving motor and a transmission, wherein the transmission can be a coupling, and when the driving shaft 16 is perpendicular to the main shaft of the driving motor, the transmission can be a worm gear transmission or a bevel gear transmission, thereby changing the transmission direction.

[0029] The mixing chamber 13 is used for preliminary mixing of the liquid to be reacted and the gas to be vented in the kettle body, and is arranged at the lower end of the double-trumpet shaft body 8; the radial side of the mixing chamber 13 is provided with a vent pipe 6 connected to the air inlet 5, and the vent pipe 6 is connected between the air inlet 5 of the kettle body and the air intake 14 of the mixing chamber 13 to allow the reaction gas to enter the mixing chamber 13; the stirring wheel 18 is arranged in the mixing chamber 13 and is connected to the drive shaft 16, and rotates coaxially with the double-trumpet shaft body 8; wherein the air inlet 5 mentioned above is located at the lower side of the cylinder 3, the number is 1, the caliber size is 25mm, and it is connected to the cylinder 3 by sealing welding. The specific installation height of the air inlet 5 in the cylinder 3 is 23-50cm from the base. A stirring wheel 18 is provided upward on the lower end surface of the mixing chamber 13. The number and shape of the blades of the stirring wheel 18 are consistent with the blades of the impeller 17. An air intake port 14 is provided on the side of the mixing chamber 13. The diameter of the air intake port 14 is consistent with the diameter of the air inlet 5, specifically 25 mm, for the inhalation of the reaction gas.

[0030] The present application constructs two gas circulation fields to facilitate the repeated recycling of unreacted gas. Specifically, the gas entering the mixing chamber 13 is initially mixed and reacted with the liquid, and the unreacted gas enters the double-trumpet type shaft body 8 driven by the stirring wheel 18, is discharged through the lower air vent 20 of the double-trumpet type shaft body 8, and returns to the double-trumpet type shaft body 8 through the self-priming paddle 10, forming a primary gas circulation field; the still unreacted gas enters the upper part of the double-trumpet type shaft body 8 driven by the airflow of the impeller 17 and the suction of the self-priming paddle 10, and is discharged through the upper air vent 12 of the double-trumpet type shaft body 8, forming a secondary gas circulation field.

[0031] The gas flow process of the ventilated reactor provided by the utility model is as follows: the reaction gas enters the mixing chamber 13 through the vent pipe 6, and under the drive of the driving mechanism 15, the stirring wheel 18 at the bottom of the mixing chamber 13 quickly mixes the gas and liquid in the mixing chamber 13. After mixing, the unreacted gas is brought into the hollow cavity of the double-horn shaft body 8 under the rotation force of the stirring wheel 18 blades and the driving force of the bottom gas moving upward, and then moves along the vent holes arranged on the double-horn shaft body 8 to the outside of the double-horn shaft body 8. Under the rotation of the self-priming paddle 10 installed on the double-horn shaft body, the incompletely reacted gas enters through the outer end of the self-priming paddle 10. To the hollow cavity of the double-trumpet type shaft body 8, it is dispersed in the reaction system again, further reacts with the liquid to form a primary gas circulation field, and the unreacted gas and liquid are mixed for the second time; the unreacted gas dispersed in the reaction system again is driven by the rotational force of the impeller 17 blades at the upper end of the double-trumpet type shaft body 8 and the attraction of the self-priming paddle 10, and is brought to the inside of the hollow cavity of the double-trumpet type shaft body 8 again, and then moves along the air holes arranged on the double-trumpet type shaft body 8 to the outside of the double-trumpet type shaft body 8, forming a secondary gas circulation field, and performing a third gas-liquid mixing, and finally the unreacted gas enters the subsequent tail gas absorption device through the exhaust port 4 above the kettle body.

[0032] The ventilated reactor provided by the utility model has a simple structure and is easy to control. It not only enhances the mixing intensity between the gas and liquid phases, but also realizes multiple recycling of the gas, improves the effect of full reaction of the gas and the material, reduces the gas loss, improves the gas utilization efficiency, and reduces the production load caused to a series of work sections such as subsequent exhaust gas disposal.

[0033] In some embodiments, the double-trumpet shaft body 8 has an upper horn body, a waisted connecting section and a lower horn body connected in sequence from top to bottom, the drive shaft 16 is connected to the lower end of the lower horn body, the self-priming paddle 10 is evenly distributed on the waisted connecting section along the circumferential direction, the upper horn body is provided with an upper air vent 12, and the lower horn body is provided with a lower air vent 20; the impeller 17 is provided at the upper end of the upper horn body.

[0034] In some embodiments, the upper vent holes 12 of the upper horn body are provided with multiple circles from top to bottom, and the upper vent holes 12 of each circle are evenly distributed along the circumference of the upper horn body; the lower vent holes 20 on the lower horn body are symmetrically distributed along the radial center line with the upper vent holes 12 on the upper horn body. Optionally, the lower vent holes 20 are arranged 50-100 cm upward from the shaft bottom 9, and the upper vent holes 12 extend 50-100 cm downward from the cover plate 11, and the caliber of each vent hole is 25-40 mm, and the distance between each adjacent vent hole is 30-50 mm.

[0035] In some embodiments, a cover plate 11 is disposed at the upper end of the upper horn body, and the impeller 17 is fixed on the lower surface of the cover plate 11. The impeller 17 is arranged below the cover plate 11, and the number of blades of the impeller 17 can be 4, 6, or 8, and the shape of the blades can be single plate type, arc type, or airfoil type, for fully mixing the reaction liquid with the reaction gas.

[0036] In some embodiments, the cover plate 11 is a spherical cover plate 11 protruding upward, welded to the upper end of the cylinder 3. The distance from the edge of the cover plate 11 to the cylinder wall of the cylinder 3 is 30-50 cm, and the vertical distance from the top of the cover plate 11 to the head 1 is 50-100 cm.

[0037] In some embodiments, the lower end of the lower horn body is provided with a shaft bottom 9, and the drive shaft 16 is fixed to the center of the shaft bottom 9. The upper end surface of the mixing chamber 13 is connected to the circumferential edge of the shaft bottom 9 by a flange connection. The maximum diameter of the cover plate 11 is the same as the maximum diameter of the shaft bottom 9, and the distance between the shaft bottom 9 and the base 2 is 50-100 cm. The height of the double horn shaft body 8 is 200-300 cm.

[0038] In some embodiments, the shaft bottom 9 is formed into a cone shape, and the drive shaft 16 is fixed to the cone top of the shaft bottom 9. The cover plate 11, the shaft bottom 9 and the double-horn shaft body 8 are welded as a whole.

[0039] In some embodiments, one end of the self-priming paddle 10 extends into the double-horn shaft body 8, and the other end is located outside the double-horn shaft body 8. The self-priming paddle 10 includes a connecting pipe 101 that runs through the double-horn shaft body 8 and tubular blades 102 arranged at both ends of the connecting pipe 101. The tubular blades 102 are provided with a plurality of vents 19 that communicate with the central cavity of the self-priming paddle 10. The blades 102 at both ends of the connecting pipe 101 are tubular in shape, and the number of blades 102 at both ends is 4-6 respectively. A fluid flow path is provided inside the blade 102, and each blade 102 is arranged with a vent 19, and the number of vents 19 is 2-3, and the number of vents 19 at both ends of the blade 102 is the same. The self-priming paddle 10 is radially extended toward the outside of the double-trumpet shaft body 8 to be flush with the widest part of the double-trumpet shaft body 8, and the self-priming paddle 10 is radially extended toward the inside of the double-trumpet shaft body 8 by 30-50 cm. The axial length of the paddle 102 is 50-80 mm.

[0040] In some embodiments, the vent 19 is in a spiral or conch shape, and is connected to the blade 102 via a flange. The number of vents 19 on each blade 102 is the same, which may be 4-6, and the intervals between adjacent vents 19 are the same. The vent 19 is in a spiral shape, which is beneficial for the extraction of unreacted gas and for dispersing the unreacted gas in the entire reaction system.

[0041] In some embodiments, the radially outward extending length of the self-priming paddle 10 is flush with the radial maximum width of the double-trumpet-type shaft body 8 .

[0042] Explanation: the radial maximum width of the double-horn shaft body 8 referred to here refers to the diameter of the maximum opening of the upper horn body or the lower horn body. The axial direction in this article is consistent with the axial direction of the drive shaft 16, and since the double-horn shaft body 8 rotates around the drive shaft axis, the double-horn shaft body 8 itself is a rotating body, so the rotation axis of the double-horn shaft body 8 coincides with the axis of the drive shaft; therefore, the radial direction is the diameter direction of the circumference perpendicular to the rotation axis.

[0043] In summary, the ventilated reactor provided in the present application is designed with a double-trumpet shaft body 8, a self-priming paddle 10, upper and lower impellers 17 and a stirring wheel 18, so that the introduced gas is rotationally dispersed among the liquid material system and two circulation fields are formed along the double-trumpet shaft body 8, thereby enhancing the mixing intensity between the gas and liquid phases and improving the gas utilization efficiency.

[0044] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ventilated reactor, characterized in that: include: The kettle body is provided with an exhaust port (4) at the top and an air inlet (5) at the bottom; A stirring device (7), comprising a driving mechanism (15) arranged outside the kettle body and a stirrer arranged inside the kettle body; the stirrer comprises a double-flag shaft body (8), a plurality of self-priming paddles (10), a stirring wheel (18) and an impeller (17); the main shaft of the driving mechanism (15) is connected to the lower end of the double-flag shaft body (8) through a driving shaft (16), and the driving shaft (16) is coaxial with the rotation axis of the double-flag shaft body (8); the self-priming paddle (10) is connected to the double-flag shaft body (8) along the radial center line of the middle part of the double-flag shaft body (8), and the double-flag shaft body (8) is provided with a vent hole; the impeller (17) is arranged at the upper end of the double-flag shaft body (8); and A mixing chamber (13) is arranged at the lower end of the double-horn shaft body (8); a vent pipe (6) communicating with the air inlet (5) is arranged on the radial side of the mixing chamber (13); the stirring wheel (18) is arranged in the mixing chamber (13) and connected to the driving shaft (16); The gas and liquid entering the mixing chamber (13) are mixed and reacted for the first time, and the unreacted gas enters the double-trumpet-type shaft body (8) driven by the stirring wheel (18), is discharged through the lower vent hole (20) of the double-trumpet-type shaft body (8), and then returns to the double-trumpet-type shaft body (8) through the self-priming paddle (10), forming a primary gas circulation field; the gas that has not yet reacted enters the upper part of the double-trumpet-type shaft body (8) driven by the airflow of the impeller (17) and the suction force of the self-priming paddle (10), and is discharged through the upper vent hole (12) of the double-trumpet-type shaft body (8), forming a secondary gas circulation field.

2. The ventilated reactor according to claim 1, characterized in that: The double-horn shaft body (8) comprises an upper horn body, a waisted connecting section and a lower horn body which are sequentially connected from top to bottom, the drive shaft (16) is connected to the lower end of the lower horn body, the self-priming paddle (10) is evenly distributed on the waisted connecting section along the circumferential direction, the upper horn body is provided with an upper vent hole (12), and the lower horn body is provided with a lower vent hole (20); the impeller (17) is provided at the upper end of the upper horn body.

3. The ventilated reactor according to claim 2, characterized in that: The upper vent holes (12) of the upper horn body are arranged in a plurality of circles from top to bottom, and the upper vent holes (12) of each circle are evenly distributed along the circumferential direction of the upper horn body; the lower vent holes (20) on the lower horn body and the upper vent holes (12) on the upper horn body are symmetrically distributed along the radial center line.

4. The ventilated reactor according to claim 2, characterized in that: A cover plate (11) is provided at the upper end of the upper horn body, and the impeller (17) is fixed on the lower surface of the cover plate (11).

5. The ventilated reactor according to claim 4, characterized in that: The cover plate (11) is a spherical cover plate (11) that protrudes upward.

6. The ventilated reactor according to claim 2, characterized in that: The lower end of the lower horn body is provided with a shaft bottom (9), and the driving shaft (16) is fixed at the center of the shaft bottom (9).

7. The ventilated reactor according to claim 6, characterized in that: The shaft bottom (9) is formed in a conical shape.

8. The ventilated reactor according to claim 1, characterized in that: One end of the self-priming paddle (10) extends into the double-horn shaft body (8), and the other end is located outside the double-horn shaft body (8). The self-priming paddle (10) comprises a connecting pipe (101) penetrating the double-horn shaft body (8) and tubular paddle blades (102) arranged at both ends of the connecting pipe (101). The tubular paddle blades (102) are provided with a plurality of vents (19) connected to the central cavity of the self-priming paddle (10).

9. The ventilated reactor according to claim 8, characterized in that: The vent (19) is in a spiral shape.

10. The ventilated reactor according to claim 8, characterized in that: The radially outward extending length of the self-priming paddle (10) is flush with the radial maximum width of the double-horn shaft body (8).

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