Phosphorous acid production reaction kettle capable of improving hydrogen chloride gas export efficiency

Abstract

The phosphorous acid production reaction kettle comprises a kettle body, the kettle body is vertically arranged, a feeding port is formed in the upper end of the kettle body, a discharging port is formed in the lower end of the kettle body, a mounting shaft is further vertically arranged in the kettle body in a self-rotation mode, and a pair of upper stirring plates and a pair of lower stirring plates are fixed to the mounting shaft. The two upper stirring plates are located at the middle section of the kettle body, the two lower stirring plates are located at the lower end of the kettle body, and a driver for driving the mounting shaft to rotate is further mounted at the outer top of the kettle body; the top of the kettle body is further fixedly connected with a pair of gas guide pipes extending into the kettle body, the two gas guide pipes are located on the peripheries of the upper stirring plate and the lower stirring plate, and the gas guide pipes are provided with a plurality of gas guide holes located in the kettle body; a spiral heat exchange pipe surrounding the two gas guide pipes is further fixedly connected into the kettle body, the two ends of the spiral heat exchange pipe are fixedly connected with vertical pipes respectively, and the vertical pipes upwards extend out of the kettle body. The utility model solves the problem of low production efficiency caused by low hydrogen chloride gas export efficiency in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to phosphorous acid production reaction kettle technical field especially relates to a kind of phosphorous acid production reaction kettle of improving hydrogen chloride gas export efficiency. BACKGROUND

[0002] In prior art, phosphorus trichloride can be used to produce phosphorous acid, such as a kind of phosphorus trichloride hydrolysis reaction kettle provided in Chinese patent with publication number CN210163133U, which includes a kettle body with a hydrolysis cavity, a water feeding pipeline, a feeding pipeline and a hydrogen chloride discharge pipe are arranged on the top of the kettle body and communicated with the hydrolysis cavity, a discharge pipe is arranged on the bottom of the kettle body and communicated with the hydrolysis cavity; it further includes a water pump communicated with the water feeding pipeline via a water feeding pipe, and a jet pump is communicated on the water feeding pipe downstream of the water pump, and the suction pipe of the jet pump is communicated with an acid liquid pool. The phosphorus trichloride hydrolysis reaction kettle of the utility model, by communicating a jet pump on the water feeding pipe downstream of the water pump, the suction pipe of the jet pump is communicated with an acid liquid pool, that is, when the water pump is turned on to feed water, the acid liquid in the acid liquid pool can be automatically sucked into the water feeding pipeline by the jet pump, so that the water flow has a certain acidity, so as to effectively inhibit the initial hydrolysis rate of phosphorus trichloride, and avoid the danger caused by excessive pressure in the kettle body. However, in actual production process, the generated hydrogen chloride gas needs to rise above the liquid level in the kettle body and then enter the discharge pipe for export, and at the same time, in order to avoid excessive pressure in the kettle body, the amount of gas generated is also relatively small, so the export efficiency of hydrogen chloride gas is also low, which ultimately leads to the low overall production efficiency. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model provides a phosphorous acid production reaction kettle for improving the export efficiency of hydrogen chloride gas, which solves the problem of low production efficiency caused by low export efficiency of hydrogen chloride gas in the prior art.

[0004] According to the embodiment of the utility model, a phosphorous acid production reaction kettle capable of improving the hydrogen chloride gas export efficiency, which comprises a kettle body, the kettle body is vertically arranged and is provided with a feeding port at the upper end and a discharging port at the lower end, a mounting shaft, a pair of upper stirring plates and a pair of lower stirring plates fixed on the mounting shaft are further vertically arranged in the kettle body, the two upper stirring plates are located in the middle section of the kettle body, the two lower stirring plates are located at the lower end of the kettle body, and a driver for driving the mounting shaft to rotate is further mounted on the outer top of the kettle body; a pair of gas guide pipes extending into the kettle body and located between the upper stirring plates and the lower stirring plates at the lower end of the kettle body are further fixedly connected to the top of the kettle body, and the two gas guide pipes are located at the periphery of the upper stirring plates and the lower stirring plates, a plurality of gas guide holes located in the kettle body are arranged on the gas guide pipes from top to bottom; a spiral heat exchange pipe surrounding the two gas guide pipes is further fixedly connected in the kettle body, and two vertical pipes are respectively fixedly connected to the two ends of the spiral heat exchange pipe, and the vertical pipes extend upwards out of the kettle body. The gas guide pipes are arranged to extend into the kettle body at the lower end, during the reaction, the driver is operated to make the upper stirring plates and the lower stirring plates in the kettle body rotate to stir the materials, so that the reaction is efficiently carried out, the generated hydrogen chloride gas can enter the gas guide pipes before leaving the material liquid surface, and can also enter from the arranged gas guide holes above the liquid surface, so that the efficiency is improved, the production efficiency is correspondingly improved, and the problem of low hydrogen chloride gas export efficiency and low production efficiency in the prior art is solved.

[0005] Further, a pair of mounting cylinders are further fixedly connected to the top of the kettle body, and the upper ends of the two vertical pipes are fixed to the two mounting cylinders and extend above the mounting cylinders.

[0006] Further, the upper edge of the spiral heat exchange pipe is opposite to the upper stirring plate, and the lower edge is opposite to the lower stirring plate.

[0007] Further, a pair of reinforcing rods are further arranged in the kettle body, the upper ends of the two reinforcing rods are fixed to the inner wall of the middle section of the kettle body through a horizontal plate, the lower ends of the two reinforcing rods are fixed to the inner wall of the bottom of the kettle body through an arc plate, and the spiral heat exchange pipe is located below the two horizontal plates and tightly abuts against the inner wall of the spiral structure of the spiral heat exchange pipe.

[0008] Further, the vertical pipe is fixed to pass through the horizontal plate.

[0009] Further, the upper and lower ends of the spiral heat exchange pipe are fixed to one of the reinforcing rods through a U-shaped buckle.

[0010] Further, the arc plate is further fixedly connected with a first reinforcing plate and a second reinforcing plate, and the lower end of the reinforcing rod is fixedly clamped between the first reinforcing plate and the second reinforcing plate.

[0011] Further, the upper end of the gas guide pipe is further fixedly connected with a first fixing disc, a second fixing disc is further arranged above the first fixing disc, and the first fixing disc and the second fixing disc are connected through an extension cylinder.

[0012] Furthermore, an upper mounting sleeve and a lower mounting sleeve are fixedly sleeved on the mounting shaft. The upper mounting sleeve is fixed to the upper agitator plate via an upper connecting rod, and the lower mounting sleeve is fixed to the lower agitator plate via a lower connecting rod.

[0013] Furthermore, both the upper and lower stirring plates are vertically oriented.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By extending the gas guide pipe to the lower end of the reactor body and setting several gas guide holes from top to bottom on the gas guide pipe, the hydrogen chloride gas generated during the reaction can enter the gas guide pipe before leaving the liquid material, and can also enter from the gas guide holes above the liquid surface. This improves efficiency and production efficiency, and solves the problem of low production efficiency caused by low hydrogen chloride gas extraction efficiency in the existing technology. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0017] Figure 2 for Figure 1 Enlarged schematic diagram of a local structure at point A;

[0018] Figure 3 for Figure 1 Enlarged schematic diagram of the local structure at point B;

[0019] Figure 4 for Figure 1 Enlarged schematic diagram of the local structure at point C;

[0020] In the above attached figures:

[0021] 1. Reactor body; 2. Inlet; 3. Outlet; 4. Mounting shaft; 5. Upper stirring plate; 6. Lower stirring plate; 7. Driver; 8. Drive motor; 9. Reducer; 10. Air guide pipe; 11. Air guide hole; 12. Spiral heat exchanger tube; 13. Vertical pipe; 14. Upper mounting sleeve; 15. Lower mounting sleeve; 16. Upper connecting rod; 17. Lower connecting rod; 18. Mounting cylinder; 19. Horizontal plate; 20. Arc plate; 21. U-shaped buckle; 22. First reinforcing plate; 23. Second reinforcing plate; 24. First fixing plate; 25. Second fixing plate; 26. Reinforcing rod; 27. Telescopic cylinder. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] In an exemplary implementation, such as Figure 1 , 2As shown, this embodiment provides a phosphorous acid production reactor for improving the efficiency of hydrogen chloride gas extraction. It includes a reactor body 1, which is vertically oriented with an inlet 2 at the top and an outlet 3 at the bottom. Inside the reactor body 1, a vertically rotating mounting shaft 4 and a pair of upper stirring plates 5 and a pair of lower stirring plates 6 are fixed to the mounting shaft 4. The two upper stirring plates 5 are located in the middle section of the reactor body 1, and the two lower stirring plates 6 are located at the lower end of the reactor body 1. A driver 7, which drives the mounting shaft 4 to rotate, is also installed on the top of the reactor body 1. The driver 7 can be a drive motor 8 and a reducer 9 connected to it. The reducer 9 has an output end and the mounting shaft 4 rotates upwards. The drive motor 8 extends to the outside of the vessel body 1 and connects to the output end. When the drive motor 8 runs, the reducer 9 runs, thereby driving the mounting shaft 4 to rotate. At the same time, the upper stirring plate 5 and the lower stirring plate 6 are both vertically arranged. When the mounting shaft 4 rotates, it drives the upper stirring plate 5 and the lower stirring plate 6 to rotate, thereby agitating the material inside the vessel body 1 (the upper stirring plate 5 and the lower stirring plate 6 are both located below the liquid surface, and there is still space above the liquid surface, that is, the material does not completely fill the entire interior of the vessel body 1). The top of the vessel body 1 is also fixedly connected to a pair of air guide pipes 10 that extend into the vessel body 1 and whose lower ends are located between the upper stirring plate 5 and the lower stirring plate 6. The two air guide pipes 10 are located at the upper stirring plate 5 and the lower stirring plate 6. The upper stirring plate 5 and the lower stirring plate 6, i.e., during the rotation of the mounting shaft 4, do not collide with the two gas guide pipes 10. The lower end of the gas guide pipe 10 extends below the material. Several gas guide holes 11 are also provided on the gas guide pipe 10 from top to bottom within the vessel body 1. Some of these gas guide holes 11 are located above the liquid surface, and some are located below the liquid surface. This arrangement allows hydrogen chloride gas generated during the reaction to enter the gas guide pipe 10 through the gas guide holes 11 when it is below the liquid surface. Some hydrogen chloride gas can first enter the liquid surface and then enter the gas guide pipe 10 through the gas guide holes 11. The gas is drawn into the gas pipe 10, thus improving efficiency and production efficiency. This solves the problem of low production efficiency caused by low hydrogen chloride gas extraction efficiency in the existing technology. Furthermore, a spiral heat exchange tube 12 is fixedly connected inside the vessel body 1, surrounding the two gas pipes 10. Each end of the spiral heat exchange tube 12 is fixedly connected to a vertical pipe 13, which extends upwards to the outside of the vessel body 1. The vertical pipe 13 is used to introduce a heating medium (such as high-temperature steam, heat transfer oil, or hot water) into the spiral heat exchange tube 12, thereby ensuring that the reaction can proceed efficiently at a suitable temperature, ultimately improving production efficiency.

[0025] like Figure 1As shown, an upper mounting sleeve 14 and a lower mounting sleeve 15 are fixedly sleeved on the mounting shaft 4. The upper mounting sleeve 14 is fixed to the upper stirring plate 5 through the upper connecting rod 16, and the lower mounting sleeve 15 is fixed to the lower stirring plate 6 through the lower connecting rod 17. This realizes the installation of the upper stirring plate 5 and the lower stirring plate 6. More specifically, the spiral heat exchange tube 12 is positioned opposite the upper stirring plate 5 and the lower stirring plate 6 respectively, that is, the positions are equivalent. This makes the heating mainly concentrated around the upper stirring plate 5 and the lower stirring plate 6, which enables the reaction to proceed efficiently.

[0026] like Figures 1-4 As shown, a pair of mounting cylinders 18 are fixedly connected to the top of the vessel body 1. The upper ends of the two vertical tubes 13 are fixed to the two mounting cylinders 18 and extend above the mounting cylinders 18. The mounting cylinders 18 provide a base for the installation of the vertical tubes 13. Furthermore, a pair of reinforcing rods 26 are also provided inside the vessel body 1. The upper ends of the two reinforcing rods 26 are fixed to the inner wall of the middle section of the vessel body 1 through the horizontal plate 19, and the lower ends are fixed to the inner wall of the bottom of the vessel body 1 through the arc plate 20. The vertical tubes 13 can pass through the horizontal plate 19 and connect to the spiral heat exchange tube 12. This allows the spiral heat exchange tube 12 to be located below the two horizontal plates 19 and the two reinforcing rods 26 to be tightly attached to the inner wall of the spiral structure of the spiral heat exchange tube 12, which can enhance the stability of the spiral heat exchange tube 12. Furthermore, the upper and lower ends of the spiral heat exchange tube 12 are respectively fixed to one of the reinforcing rods 26 by U-shaped buckles 21, which makes the upper and lower ends of the spiral heat exchange tube 12 more stable. More specifically, the horizontal plate 19 and the arc plate 20 provide the mounting base for the reinforcing rod 26 at the upper and lower ends, respectively, so that the reinforcing rod 26 itself has better stability, thereby providing a stable reinforcement for the vertical tube 13 and the spiral heat exchange tube 12. Furthermore, a first reinforcing plate 22 and a second reinforcing plate 23 are also fixedly connected to the arc plate 20, and the lower end of the reinforcing rod 26 is fixedly clamped between the first reinforcing plate 22 and the second reinforcing plate 23, which makes the lower end of the reinforcing rod 26 more stable.

[0027] like Figure 1 , 2 As shown, a first fixed plate 24 is fixedly connected to the upper end of the air duct 10. A second fixed plate 25 is also provided above the first fixed plate 24. The first fixed plate 24 and the second fixed plate 25 are connected by a telescopic cylinder 27. The second fixed plate 25 is used for external pipe connection. The telescopic cylinder 27 between the first fixed plate 24 and the second fixed plate 25 can be made of acid-resistant rubber, thus playing a role similar to an expansion joint. When the air pressure is high, the telescopic cylinder 27 can expand outward, and when the air pressure is low, the telescopic cylinder 27 retracts to the initial state, making it more adaptable.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A phosphorous acid production reactor for improving the efficiency of hydrogen chloride gas extraction, characterized in that, The kettle body is vertically arranged and is provided with an inlet at the upper end and an outlet at the lower end, and is further provided with a mounting shaft and a pair of upper stirring plates and a pair of lower stirring plates fixed on the mounting shaft and vertically arranged in the kettle body, the two upper stirring plates are located in the middle section of the kettle body, the two lower stirring plates are located at the lower end of the kettle body, and a driver for driving the mounting shaft to rotate is further mounted on the outer top of the kettle body; a pair of gas guide pipes extending into the kettle body and having the lower end located between the upper stirring plates and the lower stirring plates are further fixedly connected to the top of the kettle body, and the two gas guide pipes are located at the periphery of the upper stirring plates and the lower stirring plates, a plurality of gas guide holes located in the kettle body are arranged on the gas guide pipes from top to bottom; a spiral heat exchange pipe surrounding the two gas guide pipes is further fixedly connected in the kettle body, and two vertical pipes are respectively fixedly connected to the two ends of the spiral heat exchange pipe, and the vertical pipes extend upward out of the kettle body.

2. The phosphorous acid production reactor for improving the efficiency of hydrogen chloride gas extraction according to claim 1, wherein A pair of mounting cylinders are further fixedly connected to the top of the kettle body, and the upper ends of the two vertical pipes are fixed to the two mounting cylinders and extend above the mounting cylinders.

3. The phosphorous acid production reactor for improving the efficiency of hydrogen chloride gas extraction according to claim 1, wherein The upper edge of the spiral heat exchange pipe is opposite to the upper stirring plate, and the lower edge is opposite to the lower stirring plate.

4. The phosphorous acid production reactor for improving the efficiency of hydrogen chloride gas extraction according to claim 1, wherein A pair of reinforcing rods are further arranged in the kettle body, the upper ends of the two reinforcing rods are respectively fixed to the inner wall of the middle section of the kettle body through a horizontal plate, and the lower ends are respectively fixed to the inner wall of the bottom of the kettle body through an arc plate, the spiral heat exchange pipe is located below the two horizontal plates and the two reinforcing rods are tightly attached to the spiral structure of the inner wall of the spiral heat exchange pipe.

5. The phosphorous acid production reactor for improving the efficiency of hydrogen chloride gas extraction according to claim 4, wherein The vertical pipes are fixed through the horizontal plates.

6. The phosphorous acid production reactor for improving the efficiency of hydrogen chloride gas extraction according to claim 5, wherein The upper and lower ends of the spiral heat exchange pipe are respectively fixed to one of the reinforcing rods through a U-shaped buckle.

7. The phosphorous acid production reactor for improving the efficiency of hydrogen chloride gas extraction according to claim 4, wherein The arc plate is further fixedly connected with a first reinforcing plate and a second reinforcing plate, and the lower end of the reinforcing rod is fixedly clamped between the first reinforcing plate and the second reinforcing plate.

8. The phosphorous acid production reactor for improving the efficiency of hydrogen chloride gas extraction according to claim 1, wherein The upper end of the gas guide pipe is further fixedly connected with a first fixing disc, a second fixing disc is further arranged above the first fixing disc, and the first fixing disc and the second fixing disc are connected through an extension cylinder.

9. The phosphorous acid production reactor for improving the efficiency of hydrogen chloride gas extraction according to claim 1, wherein An upper mounting sleeve and a lower mounting sleeve are fixedly sleeved on the mounting shaft, the upper mounting sleeve is fixed to the upper stirring plate through an upper connecting rod, and the lower mounting sleeve is fixed to the lower stirring plate through a lower connecting rod.

10. The phosphorous acid production reactor for improving the efficiency of hydrogen chloride gas extraction according to any one of claims 1 to 9, wherein The upper stirring plate and the lower stirring plate are vertically arranged.

Images