Ultrafine selenium powder preparation device

Abstract

The utility model relates to a superfine selenium powder preparation device which comprises a gasification furnace, a connecting pipeline I is communicated with the gasification furnace, the other end of the connecting pipeline I is communicated with a vapor deposition furnace, a smoke exhaust port is formed in the top of the vapor deposition furnace, a discharge port is formed in the bottom of the vapor deposition furnace, and the superfine selenium powder preparation device further comprises a side blowing guide pipe. And a side blowing guide pipe is arranged beside the connecting pipeline I on the vapor deposition furnace. The device is simple in structure, low in cost and easy and convenient to operate, selenium steam is sufficiently and uniformly quenched by nitrogen, selenium powder products with consistent crystal granularity are obtained, the granularity of the prepared selenium powder can be applied to the high-end fields of photoelectricity, chemical medicine and the like, and uncrystallized selenium steam and impurities can be effectively recycled.

Description

TECHNICAL FIELD

[0001] The utility model relates to inorganic chemical preparation technical field, concretely relates to a superfine selenium powder preparation device. BACKGROUND

[0002] Selenium powder is mainly used for semiconductor material and photoconductive material, metallurgy, glass industry additive and chemical and pharmaceutical industry etc. At present, its preparation usually adopts grinding and screening process, that is, using grinding and screening process to prepare selenium powder, such as Chinese invention patent "a coarse selenium powder production process" (publication number CN102489374A), which records that the selenium ingot is broken into selenium block material with particle size <30mm, the selenium block material enters the primary crusher for primary crushing and secondary crushing, the selenium particle size after primary crushing is <10mm, the selenium particle size after secondary crushing is <3mm etc. steps, the grinding and screening process often has relatively more process, large noise, and the prepared selenium powder has large particle size, which is difficult to meet the application of some higher requirement fields. SUMMARY

[0003] In view of the above problems, the utility model provides a device for preparing superfine selenium powder from high-purity liquid selenium as raw material.

[0004] The specific technical scheme of the utility model is: a superfine selenium powder preparation device, including gasification furnace, the gasification furnace is connected with connecting pipeline I, the other end of connecting pipeline I is communicated with gas deposition furnace, the top of gas deposition furnace is provided with flue gas discharge port, the bottom of gas deposition furnace is provided with discharge port, further including side blowing guide pipe, the side blowing guide pipe is arranged on the side of connecting pipeline I of gas deposition furnace.

[0005] Further, preferably, it further includes a ring-shaped selenium vapor inlet pipe, the gas deposition furnace is provided with a selenium vapor inlet pipe outside, a plurality of gas inlets extending into the gas deposition furnace are arranged on the selenium vapor inlet pipe, and the connecting pipeline I is communicated with the selenium vapor inlet pipe.

[0006] Further, preferably, the side blowing guide pipe is also ring-shaped, the gas inlets thereof correspond to the gas inlets of the selenium vapor inlet pipe and are located above the gas inlets of the selenium vapor inlet pipe.

[0007] Further, preferably, the side blowing guide pipe forms an angle of 20-45 degrees with the horizontal line.

[0008] Further, preferably, eight gas inlets extending into the gas deposition furnace are arranged on the selenium vapor inlet pipe.

[0009] Further, preferably, it further includes a dust removal cloth bag, and the dust removal cloth bag is arranged below the flue gas discharge port at the upper part of the gas deposition furnace.

[0010] Further, preferably, a pressure regulator is further included, and the selenium vapor outlet of the gasification furnace is further provided with the pressure regulator.

[0011] Further, preferably, a communication pipe II is further included, and the gasification furnace and the vapor deposition furnace are further provided with the communication pipe II, and the communication pipe II is provided with a pressure relief valve.

[0012] Further, preferably, the connecting pipe I is further provided with a gas check valve.

[0013] Further, preferably, the gasification furnace is provided with an annular heating plate outside the lower part.

[0014] Further, preferably, the connecting pipe I is provided with a pressure gauge I, the vapor deposition furnace is provided with a pressure gauge II on the upper side, and the vapor deposition furnace is provided with a pressure gauge III on the lower side.

[0015] Further, preferably, the connecting pipe I is further provided with an insulation layer.

[0016] The utility model discloses a kind of ultrafine selenium powder preparation devices, which comprises high-purity liquid selenium as raw material, heating to about 350 ℃ in gasification furnace, make selenium gasification follow the connection pipe into vapor deposition furnace, nitrogen is blown into selenium vapor by side blowing pipe on vapor deposition furnace, selenium vapor is rapidly cooled crystallization to form superfine selenium powder, and the flue gas formed is discharged after passing through bag filter in vapor deposition furnace.

[0017] The utility model has the advantages of simple structure, low cost, simple operation, full and uniform rapid cooling of selenium vapor by nitrogen, consistent crystalline particle size of selenium powder product, particle size of prepared selenium powder can be applied in high-end fields such as photoelectric, chemical and pharmaceutical, and uncrystallized selenium vapor and impurities can be effectively recycled. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a sectional front view of the utility model one kind of superfine selenium powder preparation device;

[0019] Figure 2 It is a top view of the utility model vapor deposition furnace;

[0020] Figure 3 It is Figure 1 A local enlarged view in the of the utility model;

[0021] In the diagram: 1-Gasification furnace, 2-Vacuum phase deposition furnace, 3-Liquid selenium feed port, 4-Selenium vapor outlet, 5-Pressure regulator, 6-Connecting pipe I, 7-Insulation layer, 801-Pressure gauge I, 802-Pressure gauge II, 803-Pressure gauge III, 901-Gas check valve, 902-Pressure relief valve, 10-Flue gas outlet, 11-Dust collector bag, 12-Side blowing duct, 13-Selenium vapor inlet pipe, 14-Emission port, 15-Annular heating plate, 16-Steel furnace jacket, 17-Support, 18-Connecting pipe II, 19-Nitrogen inlet pipe, 100-Vacuum phase precipitate, 200-Liquid selenium. Detailed Implementation

[0022] To make the technical problems and solutions solved by this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] like Figure 1 As shown, the gasifier 1 is a gasifier with a structure that is mostly an existing design. It includes a stainless steel furnace chamber, which is a barrel-shaped body that carries liquid selenium 200. Its lower part is vertically installed in the steel furnace sleeve 16 through a support 17. An annular heating plate 15 is provided between the stainless steel furnace chamber and the steel furnace sleeve 16 and is filled with heat-insulating asbestos. The annular heating plate 15 can be made of multiple rows of steam heating pipes or electric heating pipes, which is a common design for gasifiers.

[0026] High purity liquid selenium 200 is added into the stainless steel furnace of the gasification furnace 1 through the liquid selenium feeding port 3 on the upper part of the gasification furnace 1, and then the gasification furnace 1 is heated to about 350℃, so that the selenium is gasified. Of course, a thermometer can be installed on the gasification furnace 1 to display the temperature in the furnace, which is the common knowledge in the field.

[0027] After vaporization, the selenium in the gasification furnace 1 enters the connecting pipeline I 6 from the selenium vapor outlet 4. A pressure regulator 5 is installed between the connecting pipeline I 6 and the selenium vapor outlet 4. This device is similar to a safety valve, but can automatically relieve pressure repeatedly after setting the pressure. After setting a certain pressure value, when the gas pressure in the tank is greater than the set value, the selenium vapor forms a positive pressure and is blown to the vapor deposition area. Existing equipment can be purchased on the market.

[0028] The other end of the connecting pipeline I 6 is connected with the vapor deposition furnace 2. A side blowing guide pipe 12 is arranged beside the connecting pipeline I 6 on the vapor deposition furnace 2, that is, the connecting pipeline I 6 can be directly connected with the vapor deposition furnace 2 through a single port, and the side blowing guide pipe 12 can also be directly connected with the vapor deposition furnace 2 through a single port. However, in order to improve the efficiency, the embodiment adopts the structure as shown in Figures 1-3 As shown in the figure, a ring-shaped selenium vapor inlet pipe 13 is arranged outside the vapor deposition furnace 2. The connecting pipeline I 6 is first connected with the selenium vapor inlet pipe 13, and eight inlet ports extending into the vapor deposition furnace 2 are uniformly arranged along the circumference of the selenium vapor inlet pipe 13. Correspondingly, the side blowing guide pipe 12 is also ring-shaped, and its inlet ports are arranged corresponding to the inlet ports of the selenium vapor inlet pipe 13 and are located above the front side of the inlet ports of the selenium vapor inlet pipe 13. The side blowing guide pipe 12 forms an angle a with the horizontal line, and the range of a is 20-45 degrees. This arrangement is conducive to the full and uniform quenching of the selenium vapor by nitrogen, so that selenium powder products with consistent crystal grain size are obtained.

[0029] A flue gas discharge port 10 is arranged at the top of the vapor deposition furnace 2, and a discharge port 14 is arranged at the bottom of the vapor deposition furnace 2.

[0030] A dust cloth bag 11 is arranged below the flue gas discharge port 10 at the upper part of the vapor deposition furnace 2.

[0031] A communication pipe II 18 is further arranged between the gasification furnace 1 and the vapor deposition furnace 2. A pressure relief valve 902 is installed on the communication pipe II 18. The communication port of the communication pipe II 18 is close to the area of the annular heating plate 15 of the gasification furnace 1. Since this heating area has a certain pressure, a safety valve needs to be added, which is similar to the safety valve of a boiler. The set safety pressure of the valve is higher than that of the pressure regulator 5, and it is used as a safety emergency facility. If the pressure regulator 5 fails, the gas discharged by the safety valve will also return to the vapor deposition area of the closed vapor deposition furnace 2.

[0032] A gas check valve 901 is further installed on the connecting pipe I 6, a pressure gauge I 801 is installed on the connecting pipe I 6, a pressure gauge II 802 is installed on the upper side of the vapor deposition furnace 2, and a pressure gauge III 803 is installed on the lower side of the vapor deposition furnace 2.

[0033] Further, preferably, a heat insulation layer 7 is further sleeved on the outer wall of the connecting pipe I 6.

[0034] Working principle, taking high-purity selenium as raw material, heating to about 350℃ in the gasification furnace 1, after the selenium vapor is introduced into the vapor deposition furnace 2 at high temperature, it is cooled by low-temperature nitrogen, and is converted from gas phase to solid phase, and is filtered through a bag-type dust collector, so that the separation and recovery of superfine selenium powder are finally realized.

[0035] The utility model is described in detail above through specific and preferred embodiments, but those skilled in the art should understand that the utility model is not limited to the above-mentioned embodiments, and any modification, equivalent replacement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An apparatus for producing ultrafine selenium powder, comprising a gasification furnace (1), characterized in that, The gasification furnace (1) is communicated with a connecting pipeline I (6), one end of the connecting pipeline I (6) is communicated with a vapor deposition furnace (2), the vapor deposition furnace (2) is provided with a flue gas discharge port (10) at the top, the vapor deposition furnace (2) is provided with a discharge port (14) at the bottom, and a side blowing guide pipe (12) is arranged beside the connecting pipeline I (6) of the vapor deposition furnace (2).

2. A device for producing ultrafine selenium powder according to claim 1, wherein An annular selenium vapor inlet pipe (13) is further arranged outside the vapor deposition furnace (2), a plurality of gas inlets extending into the vapor deposition furnace (2) are arranged on the selenium vapor inlet pipe (13), and the connecting pipeline I (6) is communicated with the selenium vapor inlet pipe (13).

3. A device for producing ultrafine selenium powder according to claim 2, wherein The side blowing guide pipe (12) is also annular, and the gas inlets thereof correspond to the gas inlets of the selenium vapor inlet pipe (13) and are arranged above the gas inlets of the selenium vapor inlet pipe (13).

4. A device for producing ultrafine selenium powder according to claim 3, wherein The side blowing guide pipe (12) is inclined at an angle of 20-45 degrees with respect to the horizontal line.

5. A device for producing ultrafine selenium powder according to claim 4, wherein Eight gas inlets extending into the vapor deposition furnace (2) are arranged on the selenium vapor inlet pipe (13).

6. A device for producing ultrafine selenium powder according to any one of claims 1 to 4, characterized in that A dust removal bag (11) is further arranged below the flue gas discharge port (10) of the vapor deposition furnace (2).

7. A device for producing ultrafine selenium powder according to claim 4, wherein A pressure regulator (5) is further arranged on the selenium vapor outlet (4) of the gasification furnace (1).

8. A device for producing ultrafine selenium powder according to claim 6, wherein A communication pipe II (18) is further arranged between the gasification furnace (1) and the vapor deposition furnace (2), and a pressure relief valve (902) is arranged on the communication pipe II (18).

9. The apparatus of claim 1, wherein the apparatus is further characterized by: A gas check valve (901) is further arranged on the connecting pipeline I (6).

10. The apparatus of claim 1, wherein the apparatus is further characterized by: An annular heating plate (15) is arranged outside the lower part of the gasification furnace (1).

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