Reaction kettle for silver nitrate production

Abstract

The utility model discloses a reaction kettle for silver nitrate production, which relates to the technical field of silver nitrate production, and comprises a kettle body, a tubular condenser, a variable frequency stirring device and an outer coil pipe which are combined into a whole, the kettle body adopts a cylinder, an elliptical seal head at the upper end and an elliptical seal head at the lower end, and a feeding port is arranged on a kettle cover. The feeding port can also be used as an observation port, a supporting seat is arranged at the 1 / 4 position of the circle center, so that the variable-frequency stirring device can be conveniently mounted, and a condenser connecting port is arranged at the 1 / 4 position of the circle center, so that the variable-frequency stirring device can be conveniently connected with the tube bundle condenser; the variable-frequency stirring device adopts a push-type paddle, the lower end of the paddle is arranged at a related line at the lower end of the kettle body, and the rotating speed can be adjusted according to the requirements in the production process. According to the utility model, an oxidation kettle and a hydrolysis kettle for silver nitrate production are combined by adopting a novel structural design, so that the height difference requirement of equipment installation is reduced, tail gas condensation and condensate reflux are enhanced, water consumption and acid consumption are reduced, and the direct recovery rate of silver nitrate is improved.

Description

Technical Field

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

[0002] The production of high-purity silver nitrate by the metallic silver method uses silver and nitric acid as raw materials, and is produced through oxidation, hydrolysis, filtration, evaporation, crystallization, drying and other processes. The oxidation and hydrolysis processes are the key processes in the production of silver nitrate. The main process of the oxidation process is that silver reacts with nitric acid to generate silver nitrate. The generated nitrogen oxides are discharged by waste gas treatment, and then the excess nitric acid is discharged through the tail gas system by high-temperature nitrate removal. The hydrolysis process is to add an impurity remover in the reactor to convert the metal ions in the silver nitrate solution into insoluble substances, and the silver nitrate solution is purified by solid-liquid separation.

[0003] The equipment used in the oxidation and hydrolysis process must have the functions of heating and cooling during the oxidation process, and also have a mixing function suitable for the solid-liquid phase reaction in the hydrolysis process. At the same time, in order to reduce water and acid consumption, it must have the function of condensing the exhaust gas. It is extremely necessary to develop a multifunctional integrated reactor suitable for the production of silver nitrate. Utility Model Content

[0004] The purpose of the utility model is to organically integrate a stirring device, a flue gas condensing device, a heating and cooling device and a kettle body in combination with the actual production of silver nitrate so as to be suitable for functions such as bulk material feeding, reactor heating and cooling, flue gas condensation, etc., so as to realize the oxidation, nitrate removal and hydrolysis processes in the production of silver nitrate in one reactor, and provide a reactor for the production of silver nitrate.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a reaction kettle for silver nitrate production, comprising a kettle body, a tube-in-tube condenser, a variable frequency stirring device and an outer coil, wherein the above components are combined into a whole, wherein the kettle body is cylindrical, and the upper and lower ends are elliptical heads, and a feeding port is provided on the kettle cover, and the feeding port can also be used as an observation port, a support seat is provided at 1 / 4 of the center of the circle to facilitate the installation of the variable frequency stirring device, and a condenser connection port is provided at 1 / 4 of the center of the circle to facilitate the connection with the tube-in-tube condenser; the variable frequency stirring device adopts a propulsion blade, and the lower end of the blade is provided with a condenser connection port, which is convenient for connecting ... It is arranged at the relevant line at the lower end of the kettle body, and the rotation speed can be adjusted according to the needs of the production process. The height setting of the bottom end of the impeller is based on the fact that the rotation of the stirring paddle is not affected after the material is added, and the solid-liquid phase can be stirred under normal working conditions. The shell-and-tube condenser adopts a shell-and-tube heat exchanger, and there is no elliptical head at the lower end. It is directly connected to the kettle body to reduce the resistance of the external exhaust gas and facilitate the reflux of the condensate. The external coil plays a role in strengthening the kettle body, and can pass steam and water as two media at the same time. The switching of the two media of steam and water can be achieved through pipeline design; the impurity remover is added through the adding mechanism and the feeding port.

[0006] As a further solution of the utility model: the adding mechanism includes a feeding seat, which is slidably connected to the inner wall of the feeding port, a placement groove for storing the impurity remover is opened inside the feeding seat, and discharge ports are opened on both sides of the bottom end of the placement groove, and a baffle for closing the discharge port is slidably connected inside the feeding seat, a spring is connected between the top of the baffle and the feeding seat, a connecting frame is fixedly connected to the outer wall of the baffle, one end of the connecting frame extending out of the feeding seat is located above the feeding port, and a floating plate is slidably connected to the inner wall of the placement groove.

[0007] As a further solution of the utility model: the adding mechanism also includes an exhaust hole, which is arranged on the outer wall of the floating plate and penetrates the floating plate, and the inside of the floating plate is slidably connected with a partition that cuts off the exhaust hole, and the outer wall of the partition is provided with a through hole.

[0008] As a further solution of the utility model: the outer wall of the feeding seat is in contact with the inner wall of the feeding port, and a handle is fixedly connected to the top of the feeding seat.

[0009] As a further solution of the utility model: the outer wall of the floating plate is in contact with the inner wall of the placement groove.

[0010] As a further solution of the utility model: the partition is in an L-shape, and a displacement groove for sliding of the partition is provided inside the floating plate.

[0011] As a further solution of the utility model: a connection hole is provided at the top of the feeding seat on one side of the handle, and the connection hole is communicated with the placement groove.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] A new structural design is adopted to combine the oxidation kettle and hydrolysis kettle in the production of silver nitrate, which reduces the height difference requirements for equipment installation, and at the same time strengthens the condensation of tail gas and the reflux of condensate to reduce water consumption and acid consumption and improve the direct recovery rate of silver nitrate;

[0014] By setting up the adding mechanism, the feeding seat is pulled upwards, the impurity remover is poured into the placement slot for storage, the float plate is placed in the placement slot, the partition is pushed to move, so that the exhaust hole and the through hole are aligned, the float plate is pushed downward to move and contact the liquid surface, and the air between the float plate and the liquid surface is discharged through the exhaust hole, so that the exhaust hole and the through hole are separated; after completion, the placement slot is pushed downward, the feeding seat is extended into the kettle body, the discharge port is automatically opened, and the impurity remover in the placement slot is put into the kettle body through the discharge port, which is convenient for the addition of the impurity remover. When adding, the outside air is prevented from entering the kettle body through the feeding port to affect the reaction in the kettle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the feeding port of the utility model;

[0017] Figure 3 It is a cross-sectional view of the feeding port of the utility model;

[0018] Figure 4 It is a cross-sectional view of the feeding seat of the utility model;

[0019] Figure 5 It is a cross-sectional view of the floating plate of the present utility model.

[0020] In the figure: 1. kettle body; 2. tube-in-tube condenser; 3. variable frequency stirring device; 4. outer coil; 5. feeding port; 6. adding mechanism; 601. feeding seat; 602. placing slot; 603. discharge port; 604. baffle; 605. spring; 606. connecting frame; 607. floating plate; 608. exhaust hole; 609. partition; 610. through hole; 7. handle; 8. connecting hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 5In the embodiment of the utility model, a reaction kettle for silver nitrate production includes a kettle body 1, a tube condenser 2, a variable frequency stirring device 3 and an outer coil 4. The above components are combined into a whole. The kettle body 1 adopts a cylinder with elliptical heads at the upper and lower ends. A feeding port 5 is provided on the kettle cover, and the feeding port 5 can also be used as an observation port. A support seat is provided at 1 / 4 of the center of the circle to facilitate the installation of the variable frequency stirring device 3. A condenser connection port is provided at 1 / 4 of the center of the circle to facilitate connection with the tube condenser 2; the variable frequency stirring device 3 adopts a propulsion blade, the lower end of the blade is arranged at the relevant line at the lower end of the kettle body 1, and the stirring speed is 0-300r / min variable frequency The rotation speed can be adjusted according to the needs of the production process. The height of the bottom end of the impeller is set based on the fact that the rotation of the stirring paddle is not affected after the material is added, and the solid-liquid phase can be stirred under normal working conditions. The shell and tube condenser 2 adopts a shell and tube heat exchanger, and there is no elliptical head at the lower end. It is directly connected to the kettle body 1 to reduce the resistance of the external exhaust gas and facilitate the reflux of the condensate. It is not suitable to use a winding pipe, which is easy to separate the gas and liquid, and is conducive to the reflux of the condensate. The outer coil 4 strengthens the kettle body 1 and can pass steam and water at the same time. The switching of the two media of steam and water can be achieved through pipeline design; the impurity remover is added through the adding mechanism 6 and the feeding port 5.

[0023] In this embodiment: a new structural design is adopted to merge the oxidation kettle and the hydrolysis kettle for silver nitrate production, thereby reducing the height difference requirement for equipment installation, and at the same time strengthening the tail gas condensation and condensate reflux to reduce water consumption and acid consumption and improve the direct recovery rate of silver nitrate.

[0024] Please refer to Figures 2 to 5 The adding mechanism 6 includes a feeding seat 601, which is slidably connected to the inner wall of the feeding port 5, and a placement groove 602 for storing the impurity remover is provided inside the feeding seat 601, and discharge ports 603 are provided on both sides of the bottom of the placement groove 602. A baffle 604 for closing the discharge port 603 is slidably connected inside the feeding seat 601, and a spring 605 is connected between the top of the baffle 604 and the feeding seat 601, and the outer wall of the baffle 604 A connecting frame 606 is fixedly connected, and one end of the connecting frame 606 extending from the feeding seat 601 is located above the feeding port 5. The inner wall of the placement groove 602 is slidably connected with a floating plate 607. The adding mechanism 6 also includes an exhaust hole 608, and the exhaust hole 608 is arranged on the outer wall of the floating plate 607 and penetrates the floating plate 607. The inside of the floating plate 607 is slidably connected with a partition 609 for cutting off the exhaust hole 608, and the outer wall of the partition 609 is provided with a through hole 610.

[0025] In this embodiment: when feeding the impurity remover, the feeding seat 601 is pulled upward so that the opening of the placement groove 602 is located outside the feeding port 5, and the impurity remover is poured into the placement groove 602 for storage. At this time, the baffle 604 is closed by the elastic force of the spring 605 to the discharge port 603. After completion, the floating plate 607 is placed in the placement groove 602, and the floating plate 607 is located above the liquid surface, pushing the partition 609 to move so that the exhaust hole 608 and the through hole 610 are aligned, and the floating plate 607 is pushed downward to move and contact the liquid surface. The air between the floating plate 607 and the liquid surface is discharged through the exhaust hole 608, and then the floating plate 607 is pushed downward to move and contact the liquid surface. The movable partition 609 moves to separate the exhaust hole 608 and the through hole 610; after completion, the placement groove 602 is pushed downward, and the feeding seat 601 extends into the kettle body 1 until the feeding seat 601 contacts the top of the feeding port 5. During this process, the connecting frame 606 contacts the feeding port 5, driving the connecting frame 606 to move. The movement of the connecting frame 606 drives the baffle 604 to move to open the discharge port 603, and the impurity remover in the placement groove 602 is put into the kettle body 1 through the discharge port 603, which is convenient for the addition of the impurity remover. When adding the impurity remover, it is prevented from entering the kettle body 1 through the feeding port 5 to affect the reaction in the kettle body 1.

[0026] Please refer to Figure 3 The outer wall of the feeding seat 601 fits with the inner wall of the feeding port 5 , and a handle 7 is fixedly connected to the top of the feeding seat 601 .

[0027] In this embodiment, the feeding seat 601 is moved by pulling the handle 7 , and the feeding seat 601 slides in the feeding port 5 .

[0028] Please refer to Figure 4 The outer wall of the floating plate 607 is in contact with the inner wall of the placement groove 602 .

[0029] In this embodiment, the floating plate 607 is convenient for sliding in the placement groove 602 .

[0030] Please refer to Figure 5 The partition 609 is in an L-shape, and a displacement groove for the partition 609 to slide is provided inside the floating plate 607.

[0031] In this embodiment: the partition plate 609 is pushed to move, and the partition plate 609 moves in the displacement groove so that the exhaust hole 608 and the through hole 610 are aligned, and the air between the floating plate 607 and the liquid surface is discharged through the exhaust hole 608.

[0032] Please refer to Figures 3 to 5 A connecting hole 8 is provided at the top of the feeding seat 601 on one side of the handle 7 , and the connecting hole 8 is connected to the placement groove 602 .

[0033] In this embodiment, the air in the placement groove 602 can be easily discharged to the outside through the connecting hole 8.

[0034] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A reaction kettle for silver nitrate production, comprising a kettle body (1), a tube condenser (2), a variable frequency stirring device (3) and an outer coil (4), wherein the above components are combined into a whole, and characterized in that: The kettle body (1) is a cylindrical body with elliptical heads at the upper and lower ends. A feed port (5) is provided on the kettle cover, and the feed port (5) can also be used as an observation port. A support seat is provided at 1 / 4 of the center of the circle to facilitate the installation of the variable frequency stirring device (3). A condenser connection port is provided at 1 / 4 of the center of the circle to facilitate connection with the tube-in-tube condenser (2). The variable frequency stirring device (3) adopts a propulsion blade, and the lower end of the blade is arranged at the relevant line at the lower end of the kettle body (1). The rotation speed can be adjusted according to the needs of the production process. The height of the bottom end of the blade is set according to the The calculation is based on the fact that the addition of materials does not affect the rotation of the stirring blade and that the solid and liquid phases can be stirred under normal working conditions. The shell-and-tube condenser (2) adopts a shell-and-tube heat exchanger, and has no elliptical head at the lower end. It is directly connected to the kettle body (1) to reduce the resistance of the exhaust gas and facilitate the reflux of the condensate. The outer coil (4) plays a role in strengthening the kettle body (1) and can pass steam and water as two media at the same time. The switching between steam and water can be achieved through pipeline design. The impurity remover is added through the adding mechanism (6) and the feeding port (5).

2. A reactor for silver nitrate production according to claim 1, characterized in that: The adding mechanism (6) comprises a feeding seat (601), the feeding seat (601) is slidably connected to the inner wall of the feeding port (5), a placement groove (602) for storing the impurity remover is provided inside the feeding seat (601), discharge ports (603) are provided on both sides of the bottom end of the placement groove (602), a baffle (604) for closing the discharge port (603) is slidably connected inside the feeding seat (601), a spring (605) is connected between the top of the baffle (604) and the feeding seat (601), a connecting frame (606) is fixedly connected to the outer wall of the baffle (604), one end of the connecting frame (606) extending out of the feeding seat (601) is located above the feeding port (5), and a floating plate (607) is slidably connected to the inner wall of the placement groove (602).

3. A reactor for silver nitrate production according to claim 2, characterized in that, The adding mechanism (6) further comprises an exhaust hole (608), the exhaust hole (608) being arranged on the outer wall of the floating plate (607) and penetrating the floating plate (607), a partition (609) for cutting off the exhaust hole (608) being slidably connected inside the floating plate (607), and a through hole (610) being provided on the outer wall of the partition (609).

4. A reactor for silver nitrate production according to claim 2, characterized in that, The outer wall of the feeding seat (601) fits into the inner wall of the feeding port (5), and a handle (7) is fixedly connected to the top of the feeding seat (601).

5. A reactor for silver nitrate production according to claim 2, characterized in that: The outer wall of the floating plate (607) fits the inner wall of the placement groove (602).

6. A reaction kettle for silver nitrate production according to claim 3, characterized in that: The partition plate (609) is in an L-shape, and a displacement groove for the partition plate (609) to slide is provided inside the floating plate (607).

7. A reaction kettle for silver nitrate production according to claim 4, characterized in that: A connection hole (8) is provided at the top of the feeding seat (601) on one side of the handle (7), and the connection hole (8) is connected to the placement groove (602).

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