Selenium dioxide production device

Abstract

The utility model relates to the technical field of selenium dioxide production, in particular to a selenium dioxide production device which comprises a reaction furnace, a feeding mechanism, a mounting shaft, a raking rod, a blanking net, a driving mechanism, an oxygen supply mechanism and an air outlet pipe, the feeding mechanism is arranged above the reaction furnace, and the discharging end of the feeding mechanism is communicated with the reaction furnace; the mounting shaft is arranged in the reaction furnace, and one end of the mounting shaft is rotationally connected with the inner wall of the reaction furnace; the multiple material raking rods are arranged, and each material raking rod is connected with the mounting shaft through two connecting rods. The driving mechanism works to drive the raking rod and the blanking net to rotate together, selenium powder accumulated at the bottom of the reaction furnace is raked, the raked selenium powder sequentially falls into the bottom of the reaction furnace through blocking and buffering of the blanking net, the selenium powder makes contact with oxygen in the falling process, the contact area between the selenium powder and the oxygen is greatly increased, and the contact time between the selenium powder and the oxygen is greatly prolonged. The reaction progress is accelerated and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of selenium oxide production, in particular to a selenium dioxide production device. Background Art

[0002] Selenium dioxide is an oxide with the chemical formula SeO2. It is a white crystalline powder with yellow-green vapor. It is soluble in water and polar organic solvents and is used as an oxidant, catalyst, chemical reagent for organic compounds and a raw material for the manufacture of various inorganic selenium compounds. At present, in the production process of selenium dioxide, the raw material selenium powder is usually put into an oxidation furnace first, and then the oxidation furnace is heated to the reaction temperature, and oxygen is introduced to react with the selenium powder to generate selenium dioxide gas, and then the temperature is reduced, and the selenium dioxide solid is collected by condensation.

[0003] Patent authorization announcement number CN 208177454 U discloses a device for continuous production of selenium dioxide, including a main silo, a weighing feeder, a first feed valve, a buffer silo, a pressurized gas valve, a pressurized gas pipeline, a second feed valve, an oxygen pipeline, an oxidation furnace, a gas slow flow hood, an outlet, and a discharge pipeline; the raw material selenium powder enters the oxidation furnace from the main silo through the weighing feeder, the buffer silo, and the discharge pipeline in sequence, and the feeding is realized without leakage under the combined action of the first feed valve, the second feed valve and the pressurized gas valve; the selenium dioxide production device proposed in this application has a simple structure, can realize continuous production of selenium dioxide without leakage, improve production efficiency, and thus increase economic benefits.

[0004] However, the above technical solution has the following shortcomings: the selenium powder entering the oxidation furnace directly falls to the bottom of the oxidation furnace and accumulates, and oxygen can only react with the selenium on the surface first, and the contact area is very limited, resulting in a long reaction time and low production efficiency. Utility Model Content

[0005] The utility model aims to provide a selenium dioxide production device in view of the problems existing in the background technology.

[0006] The technical solution of the utility model: a selenium dioxide production device, comprising:

[0007] Reactor;

[0008] A feeding mechanism is arranged above the reaction furnace, and a discharge end of the feeding mechanism is connected to the reaction furnace;

[0009] An installation shaft is arranged inside the reaction furnace, and one end of the installation shaft is rotatably connected to the inner wall of the reaction furnace;

[0010] A plurality of raking rods are provided, each of which is connected to the mounting shaft via two connecting rods;

[0011] A driving mechanism is arranged on one side of the reaction furnace, and an output end of the driving mechanism is drivingly connected to the mounting shaft;

[0012] An oxygen supply mechanism, the air inlet end of which is arranged on one side of the reaction furnace, and the air outlet end of the oxygen supply mechanism is arranged inside the reaction furnace;

[0013] The gas outlet pipe is arranged at one side of the reaction furnace and is connected with the reaction furnace.

[0014] Preferably, it further comprises a material dropping net, wherein a plurality of material dropping nets are provided, each material dropping net corresponds to a rake material rod one by one, and one side of the material dropping net is connected to the rake material rod.

[0015] Preferably, the feeding mechanism includes a main silo, a weighing feeder, a buffer silo, a first discharge valve and a second discharge valve;

[0016] The main silo is arranged above the reaction furnace;

[0017] The weighing and feeding machine is arranged between the main material bin and the reaction furnace, and the feeding pipe of the weighing and feeding machine is connected with the discharging pipe of the main material bin;

[0018] The buffer silo is arranged between the weighing feeder and the reaction furnace, the feed pipe of the buffer silo is connected with the discharge pipe of the weighing feeder, and the discharge pipe of the buffer silo is connected with the feed pipe of the reaction furnace;

[0019] The first discharge valve is arranged between the outlet of the weighing feeder and the buffer silo;

[0020] The second discharge valve is arranged between the outlet of the buffer silo and the reaction furnace.

[0021] Preferably, the driving mechanism comprises a connecting box, a driving motor, a first gear and a second gear;

[0022] The connection box is fixedly connected to one side of the reaction furnace, and one end of the installation shaft passes through the reaction furnace and the connection box and extends to the interior of the connection box;

[0023] The drive motor is connected to the connection box, and the output end of the drive motor passes through the connection box and extends to the inside of the connection box;

[0024] The first gear is located inside the connection box, and the first gear is fixed on the output shaft of the driving motor;

[0025] The second gear is located inside the connection box, the second gear is fixed on the installation shaft, and the second gear is meshed with the first gear.

[0026] Preferably, the oxygen supply mechanism comprises an air inlet pipe, a mounting cylinder, a mounting seat and an air distribution pipe;

[0027] The air inlet pipe penetrates the reactor and extends to the interior of the reactor;

[0028] The installation tube is located inside the reaction furnace, the installation tube is coaxially arranged with the installation axis, and the air inlet pipe passes through the installation tube and extends to the inside of the installation tube;

[0029] The mounting seat is coaxially arranged on the mounting shaft, and the mounting seat is rotatably connected to the mounting cylinder.

[0030] A plurality of gas distribution pipes are provided, and the plurality of gas distribution pipes are all located inside the reaction furnace, and an inlet of each gas distribution pipe is connected with the installation tube.

[0031] Preferably, the bottom of the reaction furnace is provided with supporting legs, and a plurality of supporting legs are provided.

[0032] Compared with the prior art, the above technical solution of the utility model has the following beneficial technical effects:

[0033] In the utility model, the driving mechanism drives the installation shaft to rotate, and the rotation of the installation shaft drives the raking rod and the drop net to rotate together through the connecting rod. The raking rod rotates to rake up the selenium powder accumulated at the bottom of the reaction furnace. After the selenium powder is raked up, it passes through the blocking buffer of the drop net and falls into the bottom of the reaction furnace one after another. During the falling process of the selenium powder, it contacts with oxygen, which greatly increases the contact area and contact time between the selenium powder and oxygen, shortens the reaction time, accelerates the reaction progress, and improves the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A three-dimensional diagram of an embodiment of the present utility model;

[0035] Figure 2 A cross-sectional view of an embodiment of the present utility model;

[0036] Figure 3 A cross-sectional view of an oxygen supply mechanism in an embodiment of the present utility model;

[0037] Figure 4 A three-dimensional diagram of a driving mechanism in an embodiment of the present utility model;

[0038] Figure 5 This is a three-dimensional diagram of a feeding mechanism in an embodiment of the utility model.

[0039] Figure numerals: 1. Reactor; 2. Feeding mechanism; 21. Main silo; 22. Weighing feeder; 23. Buffer silo; 24. First discharge valve; 25. Second discharge valve; 3. Mounting shaft; 4. Rake rod; 5. Driving mechanism; 51. Connecting box; 52. Driving motor; 53. First gear; 54. Second gear; 6. Oxygen supply mechanism; 61. Air inlet pipe; 62. Mounting cylinder; 63. Mounting seat; 64. Air distribution pipe; 7. Air outlet pipe; 8. Dropping net; 9. Support legs. DETAILED DESCRIPTION

[0040] Embodiment 1

[0041] like Figure 1-5 As shown, a selenium dioxide production device proposed by the utility model comprises:

[0042] Reactor 1, feeding mechanism 2, mounting shaft 3, rake rod 4, drop net 8, driving mechanism 5, oxygen supply mechanism 6 and outlet pipe 7; a heating system is arranged inside the reactor 1 to heat the reactor 1 to the temperature required for reaction, a surface of the reactor 1 is wrapped with a heat preservation layer, a support leg 9 is arranged at the bottom of the reactor 1, and a plurality of support legs 9 are arranged;

[0043] The feeding mechanism 2 is arranged above the reaction furnace 1, and the discharge end of the feeding mechanism 2 is connected to the reaction furnace 1;

[0044] The installation shaft 3 is arranged inside the reaction furnace 1, and one end of the installation shaft 3 is rotatably connected to the inner wall of the reaction furnace 1;

[0045] A plurality of rake rods 4 are provided, and the rake rods 4 and the mounting shaft 3 are arranged parallel to each other, and each rake rod 4 is connected to the mounting shaft 3 through two connecting rods;

[0046] There are multiple blanking nets 8, each blanking net 8 corresponds to the rake rod 4 one by one, and one side of the blanking net 8 is fixedly connected to the rake rod 4;

[0047] The driving mechanism 5 is arranged at one side of the reaction furnace 1, and the output end of the driving mechanism 5 is drivingly connected to the mounting shaft 3;

[0048] The air inlet end of the oxygen supply mechanism 6 is arranged at one side of the reaction furnace 1 , and the air outlet end of the oxygen supply mechanism 6 is arranged inside the reaction furnace 1 .

[0049] Embodiment 2

[0050] like Figure 1-5 As shown, the selenium dioxide production device proposed by the utility model, compared with the first embodiment, this embodiment further specifically discloses the structure of the feeding mechanism 2; the feeding mechanism 2 includes a main material bin 21, a weighing feeder 22, a buffer material bin 23, a first discharge valve 24 and a second discharge valve 25;

[0051] The main silo 21 is arranged above the reaction furnace 1;

[0052] The weighing and conveying machine 22 is arranged between the main material bin 21 and the reaction furnace 1. The weighing and conveying machine 22 is electrically connected to the power supply and the control system through a wire. The feeding pipe of the weighing and conveying machine 22 is connected to the discharge pipe of the main material bin 21. A control valve for controlling the discharge speed is arranged between the discharge pipe of the main material bin 21 and the discharge pipe of the main material bin 21.

[0053] The buffer silo 23 is arranged between the weighing feeder 22 and the reaction furnace 1. A vibration motor is arranged on the surface of the buffer silo 23 and is electrically connected to the power supply and the control system through a wire. When the selenium powder in the buffer silo 23 is blocked, the vibration motor works to vibrate the buffer silo 23. The feed pipe of the buffer silo 23 is connected to the discharge pipe of the weighing feeder 22, and the discharge pipe of the buffer silo 23 is connected to the feed pipe of the reaction furnace 1.

[0054] The first discharge valve 24 is arranged between the outlet of the weighing conveyor 22 and the buffer silo 23;

[0055] The second discharge valve 25 is disposed between the outlet of the buffer silo 23 and the reaction furnace 1 .

[0056] Embodiment 3

[0057] like Figure 1-4 As shown, the selenium dioxide production device proposed by the utility model, compared with the second embodiment, this embodiment further specifically discloses the structure of the driving mechanism 5; the driving mechanism 5 includes a connecting box 51, a driving motor 52, a first gear 53 and a second gear 54;

[0058] The connection box 51 is fixedly connected to one side of the reaction furnace 1, and one end of the installation shaft 3 passes through the reaction furnace 1 and the connection box 51 and extends to the inside of the connection box 51;

[0059] The drive motor 52 is connected to the connection box 51. The drive motor 52 is a variable frequency motor, which is electrically connected to the power supply and the control system through a wire. The output end of the drive motor 52 passes through the connection box 51 and extends to the inside of the connection box 51.

[0060] The first gear 53 is located inside the connection box 51, and the first gear 53 is fixed on the output shaft of the driving motor 52;

[0061] The second gear 54 is located inside the connection box 51 . The second gear 54 is fixed to the mounting shaft 3 . The second gear 54 and the first gear 53 are meshed with each other.

[0062] Embodiment 4

[0063] like Figure 1-3 As shown, the selenium dioxide production device proposed by the utility model, compared with the third embodiment, this embodiment further specifically discloses the structure of the oxygen supply mechanism 6; the oxygen supply mechanism 6 includes an air inlet pipe 61, a mounting tube 62, a mounting seat 63 and an air distribution pipe 64;

[0064] The air inlet pipe 61 penetrates the reactor 1 and extends to the interior of the reactor 1. The inlet of the air inlet pipe 61 is connected to the oxygen supply system to provide the required oxygen for the chemical reaction in the reactor 1.

[0065] The installation tube 62 is located inside the reaction furnace 1, and the installation tube 62 is coaxially arranged with the installation axis 3. The air inlet pipe 61 passes through the installation tube 62 and extends to the inside of the installation tube 62;

[0066] The mounting seat 63 is coaxially arranged on the mounting shaft 3, and the mounting seat 63 is rotatably connected to the mounting tube 62.

[0067] There are multiple gas distribution pipes 64, which are staggered with the rake rod 4. A plurality of gas distribution holes are penetrated through the surface of the gas distribution pipe 64 close to the rake rod 4. The multiple gas distribution pipes 64 are all located inside the reactor 1, and the inlet of each gas distribution pipe 64 is connected to the mounting tube 62.

[0068] The selenium powder sent out from the main silo 21 enters the weighing feeder 22. After the weighing feeder 22 measures an appropriate amount of selenium powder, the second discharge valve 25 is closed and the first discharge valve 24 is opened. The selenium powder sent out from the weighing feeder 22 enters the buffer silo 23. The first discharge valve 24 is closed and the second discharge valve 25 is slowly opened. The selenium powder is sent from the buffer silo 23 into the reactor 1. After the selenium powder in the buffer silo 23 is completely discharged, the second discharge valve 25 is closed, and the driving motor 52 works to drive the second gear 54 and the first gear 53 ... The installation shaft 3 rotates, and the installation shaft 3 rotates to drive the rake rod 4 to rotate together through the connecting rod. The rake rod 4 rotates to rake up the selenium powder accumulated at the bottom of the reactor 1. After the selenium powder is raked up, it passes through the blocking buffer of the drop net 8 and falls into the bottom of the reactor 1 one after another, which greatly increases the contact area and contact time between the selenium powder and oxygen. At the same time, oxygen is sent into the installation cylinder 62 through the air inlet pipe 61, and the oxygen in the installation cylinder 62 is sprayed out through the air distribution pipe 64 to react with the falling selenium powder. The produced selenium dioxide gas is discharged and collected from the air outlet pipe 7.

[0069] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A selenium dioxide production device, characterized in that: include: Reactor (1); A feeding mechanism (2) is arranged above the reaction furnace (1), and a discharge end of the feeding mechanism (2) is connected to the reaction furnace (1); An installation shaft (3) is arranged inside the reaction furnace (1), and one end of the installation shaft (3) is rotatably connected to the inner wall of the reaction furnace (1); A plurality of raking rods (4) are provided, and each raking rod (4) is connected to the mounting shaft (3) via two connecting rods; A driving mechanism (5) is arranged on one side of the reaction furnace (1), and an output end of the driving mechanism (5) is drivingly connected to the mounting shaft (3); An oxygen supply mechanism (6), the air inlet end of which is arranged on one side of the reaction furnace (1), and the air outlet end of the oxygen supply mechanism (6) is arranged inside the reaction furnace (1); An air outlet pipe (7) is arranged on one side of the reaction furnace (1), and the air outlet pipe (7) is connected to the reaction furnace (1).

2. A selenium dioxide production device according to claim 1, characterized in that, It also comprises a material dropping net (8), a plurality of material dropping nets (8) are provided, each material dropping net (8) corresponds to a rake material rod (4) one by one, and one side of the material dropping net (8) is connected to the rake material rod (4).

3. A selenium dioxide production device according to claim 1, characterized in that, The feeding mechanism (2) comprises a main material bin (21), a weighing feeder (22), a buffer material bin (23), a first discharge valve (24) and a second discharge valve (25); The main material bin (21) is arranged above the reaction furnace (1); The weighing and conveying machine (22) is arranged between the main material bin (21) and the reaction furnace (1), and the feeding pipe of the weighing and conveying machine (22) is connected to the discharge pipe of the main material bin (21); The buffer bin (23) is arranged between the weighing conveyor (22) and the reaction furnace (1), the feed pipe of the buffer bin (23) is connected to the discharge pipe of the weighing conveyor (22), and the discharge pipe of the buffer bin (23) is connected to the feed pipe of the reaction furnace (1); The first discharge valve (24) is arranged between the outlet of the weighing conveyor (22) and the buffer bin (23); The second discharge valve (25) is arranged between the outlet of the buffer silo (23) and the reaction furnace (1).

4. A selenium dioxide production device according to claim 1, characterized in that: The driving mechanism (5) comprises a connecting box (51), a driving motor (52), a first gear (53) and a second gear (54); The connection box (51) is fixedly connected to one side of the reaction furnace (1), and one end of the installation shaft (3) passes through the reaction furnace (1) and the connection box (51) and extends to the interior of the connection box (51); The driving motor (52) is connected to the connection box (51), and the output end of the driving motor (52) passes through the connection box (51) and extends to the interior of the connection box (51); The first gear (53) is located inside the connection box (51), and the first gear (53) is fixed on the output shaft of the driving motor (52); The second gear (54) is located inside the connection box (51), the second gear (54) is fixed on the installation shaft (3), and the second gear (54) and the first gear (53) are meshed with each other.

5. A selenium dioxide production device according to claim 1, characterized in that, The oxygen supply mechanism (6) comprises an air inlet pipe (61), a mounting tube (62), a mounting seat (63) and an air distribution pipe (64); The air inlet pipe (61) penetrates the reaction furnace (1) and extends to the interior of the reaction furnace (1); The mounting tube (62) is located inside the reaction furnace (1), the mounting tube (62) is coaxially arranged with the mounting shaft (3), and the air inlet pipe (61) passes through the mounting tube (62) and extends to the inside of the mounting tube (62); The mounting seat (63) is coaxially arranged on the mounting shaft (3), and the mounting seat (63) is rotatably connected to the mounting cylinder (62) A plurality of gas distribution pipes (64) are provided, and the plurality of gas distribution pipes (64) are all located inside the reaction furnace (1), and the inlet of each gas distribution pipe (64) is connected to the installation cylinder (62).

6. A selenium dioxide production device according to claim 1, characterized in that: The bottom of the reaction furnace (1) is provided with a supporting leg (9), and a plurality of supporting legs (9) are provided.

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