CN216785731U - Selenium dioxide production device - Google Patents
Selenium dioxide production device Download PDFInfo
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- CN216785731U CN216785731U CN202220457440.XU CN202220457440U CN216785731U CN 216785731 U CN216785731 U CN 216785731U CN 202220457440 U CN202220457440 U CN 202220457440U CN 216785731 U CN216785731 U CN 216785731U
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Abstract
The utility model provides a selenium dioxide production device, which comprises a temperature instrument cabinet and an oxidation chamber, wherein the oxidation chamber comprises an upper oxidation chamber and a lower oxidation chamber, the side surface of the upper oxidation chamber is provided with a charging opening, an oxygen inlet and a PLC temperature control system A are arranged above the oxidation chamber, a heater A and a heater B are respectively arranged below the upper oxidation chamber and at the bottom of the lower oxidation chamber, the upper oxidation chamber is connected with a secondary sedimentation chamber through a communicating pipe, baffles are respectively arranged in the primary sedimentation chamber and the secondary sedimentation chamber, and expansion joints are respectively arranged on the communicating pipes between the upper oxidation chamber and the secondary sedimentation chamber, and between the secondary sedimentation chamber and the primary sedimentation chamber. The utility model arranges the feed inlet on the side surface, and the feed inlet and the communicating pipe are positioned on the same horizontal line, thus being easy to dredge the crystalline selenium dioxide, the expanding joint arranged between the oxidation chamber and the multistage settling chamber is easy to disassemble, assemble and clean the blocked flue, and the heater is portable, simple in structure, low in manufacturing cost, convenient in maintenance and operation and high in production efficiency.
Description
Technical Field
The utility model belongs to the technical field of smelting equipment, and particularly relates to a selenium dioxide production device.
Background
The selenium dioxide is mainly used in electrolytic manganese industry, accounting for more than 80% of the total consumption, and the domestic method for producing selenium dioxide basically adopts an oxygen oxidation method, adopts a selenium oxidation furnace as adopted equipment, and is generally adopted due to simple structure and stable product. Most of domestic selenium oxidation furnaces come from Jiangsu salt city and Hunan province, the differences in structure, principle, performance and the like are not large, but the problems that pipeline crystallization is not easy to clean and the production energy is low exist in the actual production process. In addition, selenium has strong corrosivity in a high-temperature molten state, and the service life of equipment is low.
The patent number is "CN 202208640U, and utility model name is a selenium oxide generating device" specifically discloses a selenium oxide generating device, including preheater, oxidation furnace, three-way pipe, the left side of oxidation furnace is equipped with the furnace gate, and the preheater is installed on the oxidation furnace that is close to furnace gate one end, and the three-way pipe is erecting and is installing on the oxidation furnace of keeping away from furnace gate one end, and oxygen inlet pipe sets up on the oxidation furnace between preheater and three-way pipe, the mouth of pipe is equipped with sealed lid, preheater, furnace gate, three-way pipe and oxidation furnace and links up the part and seal with the asbestos, and the bolt-up is added to the outside. The outer walls of the preheating furnace and the oxidizing furnace are provided with heating plates for heating and heat preservation of the furnace body. The selenium oxidation furnace is one of common selenium dioxide production devices, and the device mainly has the defects of low production capacity, frequent feeding, easy crystallization and difficult cleaning of a three-way pipe, poor sealing performance of a preheating furnace, more excessive smoke and poor field environment.
The patent with the patent number of 'CN 203568848U, the utility model discloses a selenium dioxide converter' specifically discloses a selenium dioxide converter, including melting jar, collecting box, buffer tank, oxygen discharge pipeline, one section oxidation cavity and two section oxidation cavity. The lower end of the melting tank is connected with a section of oxidation cavity, the section of oxidation cavity is connected with the gas inlet end of the second section of oxidation cavity, the gas outlet end of the second section of oxidation cavity is connected with the condensation collection box, and the gas outlet end of the condensation collection box is communicated with the buffer box; the first section of oxidation cavity is also communicated with the oxygen discharge pipeline. Baffles are arranged in the two-stage oxidation cavity and the condensation collection box to form an S-shaped channel, so that selenium steam and oxygen conveying routes are increased, and the reaction time of selenium and oxygen is prolonged in a limited space. According to the selenium dioxide production device, the selenium dioxide is mainly condensed on the first-section oxidation cavity and the second-section oxidation cavity partition plate and is not easy to clean, and the selenium dioxide at the air inlet position of the second-section oxidation cavity is easy to crystallize and is difficult to clean.
SUMMERY OF THE UTILITY MODEL
The utility model provides a selenium dioxide production device for solving the problems, which aims to solve the problems of low production capacity, easy crystallization of a flue gas pipeline, difficult cleaning and the like commonly existing in the conventional selenium dioxide production device.
The technical scheme of the utility model is realized as follows: a selenium dioxide production device comprises a temperature instrument cabinet and an oxidation chamber, wherein the oxidation chamber comprises an upper oxidation chamber and a lower oxidation chamber which are connected through bolts, a feed inlet is formed in the side face of the upper oxidation chamber, an oxygen inlet and a PLC temperature control system A are arranged above the oxidation chamber, a heater A and a heater B are respectively arranged below the upper oxidation chamber and at the bottom of the lower oxidation chamber, the upper oxidation chamber is connected with a secondary settling chamber through a communicating pipe, the secondary settling chamber is connected with a primary settling chamber through a communicating pipe, the primary settling chamber is connected with a tail gas absorption device, baffles are arranged in the primary settling chamber and the secondary settling chamber, and a vacuum pump and a vacuum meter are arranged on the tail gas absorption device;
preferably, expansion joints are arranged on a communicating pipe between the upper oxidation chamber and the secondary sedimentation chamber and a communicating pipe between the secondary sedimentation chamber and the primary sedimentation chamber;
preferably, the feed inlet and the upper plane of the communicating pipe are positioned on the same horizontal line;
preferably, a PLC temperature control system B is arranged on the secondary settling chamber;
preferably, the heater B is arranged at the bottom of the lower oxidation chamber through a clamping ring.
The utility model has the beneficial effects that: the utility model arranges the feed inlet on the side surface, and the feed inlet and the communicating pipe are positioned on the same horizontal line, thus being easy to dredge the crystalline selenium dioxide, the communicating pipe between the oxidation chamber and the primary settling chamber is easy to disassemble, assemble and clean and block the flue through the expansion joint, and the heater is portable, simple in structure, low in manufacturing cost, convenient in maintenance and operation and high in production efficiency.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the oxidation chamber of the present invention;
fig. 3 is a schematic view of the installation of the heater of the present invention.
Description of the parts: 1. the system comprises a temperature instrument cabinet, 2, an oxidation chamber, 3, an oxygen inlet, 4, PLC temperature control systems A and 5, PLC temperature control systems B and 6, a primary settling chamber, 7, a tail gas absorption device, 8, a vacuum pump and a vacuum meter, 9, a charging opening, 10, a communicating pipe, 11, a baffle, 12, heaters A and 13, heaters B and 14, a furnace door, 15, a discharge valve, 16, a secondary settling chamber, 17, a lower oxidation chamber, 18, a clamping ring, 19 and an expansion joint.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to figures 1-3: a selenium dioxide production device comprises a temperature instrument cabinet 1 and an oxidation chamber 2, wherein the oxidation chamber 2 consists of an upper part and a lower part, the size specification of the upper oxidation chamber is phi 850mm 650mm, the material is 316L stainless steel, the size specification of the lower oxidation chamber 17 is phi 850mm 550mm, the material is high temperature resistant oxidation steel, the side surface of the upper oxidation chamber is provided with a feed inlet 9, the upper part is provided with an oxygen inlet 3, and a PLC temperature control system A4 can realize manual, automatic and upper computer remote monitoring; a primary settling chamber 6 and a secondary settling chamber 16 are arranged, and a furnace door is arranged below the settling chambers and used for loading and unloading products; the heater is positioned below the upper oxidation chamber and at the bottom of the lower oxidation chamber and consists of a 304 stainless steel shell, a heat-insulating brick and an electric furnace wire; the tail gas absorption device 7 is positioned at the end of the whole device, and absorbs the redundant selenium dioxide tail gas by adopting a water absorption method, and a discharge valve 15 is arranged at the bottom of the tail gas absorption device; expansion joints are arranged on communicating pipes 10 between the upper oxidation chamber and the two-stage settling chambers and are used for cleaning crystallization pipelines; the first-stage settling chamber 6 and the second-stage settling chamber 16 are internally provided with baffles 11 for buffering selenium steam, increasing the contact time of selenium and oxygen and ensuring the oxidation effect; a vacuum pump and a vacuum meter 8 are arranged on the tail gas absorption device 7, so that the whole system is kept in a stable negative pressure state; the selenium dioxide production device introduces the portable electric heater to replace refractory material masonry, is simple to operate, has high production efficiency and is convenient for industrial production and application.
Before operation, qualified crude selenium raw materials are added from a feed inlet 9 on the side surface of an oxidation chamber of the furnace, a furnace cover is closed, and selenium is heated. After the temperature reaches 250 ℃, oxygen supply is started until the temperature reaches the set temperature. When the temperature is lower than the set value, the oxygen is supplied at a small flow rate, and when the temperature of the furnace body is higher than the set value, the oxygen supply amount is gradually increased. The oxygen supply speed is adapted to the speed of selenium oxidation and volatilization, and the oxygen supply pressure is required to be stable. And oxidizing the volatilized selenium in the oxidation chamber to generate gaseous selenium dioxide, starting a vacuum pump, condensing the selenium dioxide in a multi-stage settling chamber under a negative pressure control state, and reacting the redundant selenium dioxide with water to generate selenious acid solution for subsequent recovery treatment.
When the crystallization in oxidation chamber or the communicating tube needs to be cleared up, because the oxidation chamber is two parts, the middle part is the bolt fastening, can dismantle clearance furnace, will communicate the expansion joint on the pipe and dismantle, the clearance flue blocks up, also can directly clear up the crystallization of communicating pipe department through the charge door of oxidation chamber side.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (5)
1. A selenium dioxide production device comprises a temperature instrument cabinet (1) and an oxidation chamber (2), and is characterized in that the oxidation chamber (2) comprises an upper oxidation chamber and a lower oxidation chamber (17) which are connected through bolts, a feed inlet (9) is arranged on the side surface of the upper oxidation chamber, an oxygen inlet (3) and a PLC temperature control system A (4) are arranged above the oxidation chamber, a heater A (12) and a heater B (13) are respectively arranged below the upper oxidation chamber and at the bottom of the lower oxidation chamber (17), the upper oxidation chamber is connected with a secondary settling chamber (16) through a communicating pipe (10), the secondary settling chamber (16) is connected with a primary settling chamber (6) through a communicating pipe, the primary settling chamber (6) is connected with a tail gas absorption device (7), baffles (11) are arranged in the primary settling chamber (6) and the secondary settling chamber (16), and a vacuum pump and a vacuum meter (8) are arranged on the tail gas absorption device (7).
2. A selenium dioxide production plant according to claim 1, characterized in that the communicating pipe (10) between the upper oxidation chamber and the secondary sedimentation chamber (16) and between the secondary sedimentation chamber (16) and the primary sedimentation chamber (6) is provided with expansion joints (19).
3. A device for the production of selenium dioxide according to claim 1 or 2, characterized in that the charging opening (9) is located on the same horizontal line as the upper plane of the communicating tube (10).
4. A selenium dioxide production apparatus according to claim 1 or 2, characterized in that the secondary settling chamber (16) is provided with a PLC temperature control system B (5).
5. A selenium dioxide production apparatus according to claim 1 or 2, characterized in that the heater B (13) is mounted at the bottom of the lower oxidation chamber (17) by means of a snap ring (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220457440.XU CN216785731U (en) | 2022-03-04 | 2022-03-04 | Selenium dioxide production device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220457440.XU CN216785731U (en) | 2022-03-04 | 2022-03-04 | Selenium dioxide production device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216785731U true CN216785731U (en) | 2022-06-21 |
Family
ID=82000362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220457440.XU Active CN216785731U (en) | 2022-03-04 | 2022-03-04 | Selenium dioxide production device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216785731U (en) |
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2022
- 2022-03-04 CN CN202220457440.XU patent/CN216785731U/en active Active
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