Vacuum distillation device for electronic-grade sulfuric acid

Abstract

The utility model discloses a vacuum distillation device for electronic grade sulfuric acid, which comprises a distillation kettle, a vacuum pump communicated with the inside of the distillation kettle is mounted at the upper part of the left side of the distillation kettle, a connecting pipe is mounted at the upper part of the right side of the distillation kettle, the other end of the connecting pipe extends into a condensing box, and the joints of the two ends of the connecting pipe are sealed. The vacuum distillation device comprises a distillation kettle, a condensation box is arranged in the distillation kettle, an air conditioner is installed on the rear end face of the condensation box, the air conditioner is connected with a condensation mechanism in the condensation box, and an inner groove is formed in the distillation kettle. The bottom of the tank body is heated through the heating device at the bottom of the tank body, so that sulfuric acid in the tank body is gasified, and although heating treatment can be carried out, the problems that the upper part of the tank body is heated slowly and the internal sulfuric acid is heated insufficiently uniformly are solved due to the fact that the heating surface is located at the bottom.

Description

Technical Field

[0001] The utility model relates to the technical field of sulfuric acid processing equipment, in particular to a vacuum distillation device for electronic grade sulfuric acid. Background Art

[0002] A vacuum distillation apparatus is an experimental or industrial device used for distillation under reduced pressure. It is mainly used to separate substances that are easily decomposed when heated to boiling point under normal pressure. Vacuum distillation utilizes the principle that the boiling point of substances decreases under low pressure conditions, so that substances that are difficult to separate or easily decompose under normal pressure can be effectively separated and purified at lower temperatures. Vacuum distillation is widely used in chemistry, organic synthesis, separation and purification of metal compounds, and is also used for the deep purification of certain special gases.

[0003] During the vacuum distillation of sulfuric acid, the pressure inside the tank is reduced by a vacuum pump, and the bottom of the tank is heated by a heating device at the bottom of the tank, thereby vaporizing the sulfuric acid inside the tank. Although this method can be used for heating treatment, since the heating surface is at the bottom, the upper part of the tank is heated slowly and the internal sulfuric acid is not heated evenly.

[0004] Therefore, it is necessary to provide a vacuum distillation device for electronic grade sulfuric acid to solve the above technical problems. Utility Model Content

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a vacuum distillation device for electronic grade sulfuric acid to solve the problem that in the current vacuum distillation process of sulfuric acid, the pressure in the tank body is reduced by a vacuum pump, and the bottom of the tank body is heated by a heating device at the bottom of the tank body, thereby vaporizing the sulfuric acid inside the tank body. Although this method can perform heating treatment, since the heating surface is at the bottom, the upper part of the tank body is heated slowly, and the internal sulfuric acid is not heated evenly.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A vacuum distillation device for electronic grade sulfuric acid, comprising: a distillation kettle;

[0008] A vacuum pump connected to the interior of the distillation kettle is installed on the upper left side of the distillation kettle, and a connecting pipe is installed on the upper right side of the distillation kettle. The other end of the connecting pipe extends to the interior of the condensation box. Both ends of the connecting pipe are sealed. An air cooler is installed on the rear end surface of the condensation box, and the air cooler is connected to the condensation mechanism inside the condensation box. An inner tank is opened inside the distillation kettle. The inner tank is a cylindrical structure as a whole, which is used to provide a space for heating and gasifying sulfuric acid. The top surface of the distillation kettle is equipped with a top cover that is sealed and connected to it.

[0009] In one embodiment, a positioning groove is provided on the outer side of the top surface of the inner groove, and the positioning groove is a rectangular groove. The top cover as a whole is a rectangular plate, and a positioning plate matching the inner diameter of the positioning groove is installed on its inner bottom surface.

[0010] In one embodiment, a feed pipe is installed on the left side of the top surface of the top cover, and the feed pipe is used to add sulfuric acid to be processed in the distillation kettle. The feed pipe is equipped with a sealing end head. An electric control box is installed on the right top surface of the top cover, and the electric control box is electrically connected to the heating plate through wires. There are multiple heating plates, and the heating plates are arranged in a circular array and installed on the inner top surface of the top cover. The heating plate is on the inner side of the positioning plate. The distillation kettle is provided with a heating groove on the outer side of the top surface of the inner groove, and the heating plate is plug-fitted and connected to the heating groove, wherein no corresponding heating groove is provided at the position of the connecting pipe and the vacuum pump.

[0011] In one embodiment, the condensation mechanism is composed of a diverter plate, a diverter tube, and a collection box. The diverter plate is a frustum structure with a small-diameter end at the top and a large-diameter end at the bottom. The upper part of the diverter plate is connected to the connecting tube, and a diverter tube is installed on the bottom surface of the diverter plate. A plurality of diverter tubes are arranged in a rectangular array, and the bottom of the diverter tube is connected to the collection box.

[0012] In one embodiment, a cold air plate is sleeved on the outside of the tube body of the diverter pipe, and the cold air plates are arranged in four groups at intervals. The rear end of each group is connected to the air conditioner through an air inlet pipe. A single cold air plate corresponds to a single row of diverter pipes. A cold air groove is provided on the top surface of the cold air plate. The cold air groove is a circular groove with a diameter larger than the diameter of the diverter pipe. Air holes are provided on the inner walls on both sides of the cold air groove, and the height of the cold air plate is consistent with the height of the diverter pipe.

[0013] The beneficial effects of the utility model are as follows:

[0014] (1) The utility model puts sulfuric acid to be processed into the inner tank from the feed pipe, starts the vacuum pump to reduce the pressure inside the distillation kettle, starts the electric control box to supply heat to the heating plate, and through the matching arrangement of the heating plate and the heating tank, the inner tank is evenly heated. At the same time, the heating plate is connected to the top cover. When the top cover is removed, the heating plate is simultaneously moved out, which is convenient for replacement and maintenance of the heating plate. Compared with the traditional bottom nested structure, it is more convenient to use.

[0015] (2) The utility model transmits steam to the inside of the diverter plate through a connecting pipe. The diverter plate divides the steam into multiple streams for transmission, so that the distilled gas is condensed more finely, effectively improving the condensation efficiency. The steam is introduced into the diverter pipe, and the air conditioner introduces cold air into the cold air plate, so that the air holes are blown directly towards the diverter pipe, so that the steam in the diverter pipe is condensed. At the same time, the excess cold air is filled in the condensation box to assist the initial condensation at the diverter plate. The condensed liquid flows into the collection box for storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the overall structure diagram of the utility model;

[0017] Figure 2 This is a detailed internal cross-sectional view of the overall structure of the utility model;

[0018] Figure 3 This is a detailed diagram of the top cover and distillation kettle of the utility model;

[0019] Figure 4 This is a detailed diagram of the condensation mechanism of the utility model.

[0020] Among them, the names corresponding to the figure marks are: distillation kettle 1, inner tank 11, positioning groove 12, heating tank 13, vacuum pump 2, connecting pipe 3, condensation box 4, air conditioner 5, top cover 6, feed pipe 61, electric control box 62, positioning plate 63, heating plate 64, electric wire 65, condensation mechanism 7, diverter plate 71, diverter pipe 72, air inlet pipe 73, cold air plate 74, cold air groove 75, air hole 76, collection box 77. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The present invention includes but is not limited to the following embodiments.

[0022] like Figure 1-Figure 2 As shown, the utility model provides a vacuum distillation device for electronic grade sulfuric acid, comprising: a distillation kettle 1, a vacuum pump 2, a connecting pipe 3, a condensation box 4, an air cooler 5, a top cover 6, and a condensation mechanism 7;

[0023] like Figure 1-Figure 2 As shown, a vacuum pump 2 connected to the interior of the distillation kettle 1 is installed on the upper left side, and a connecting pipe 3 is installed on the upper right side of the distillation kettle 1. The other end of the connecting pipe 3 extends to the interior of the condensation box 4. Both ends of the connecting pipe 3 are sealed. An air cooler 5 is installed on the rear end face of the condensation box 4. The air cooler 5 is connected to the condensation mechanism 7 inside the condensation box 4 to supply cooling gas to the condensation mechanism 7. An inner tank 11 is opened inside the distillation kettle 1. The inner tank 11 is a cylindrical structure as a whole, which is used to provide sulfuric acid heating and gasification space. The top surface of the distillation kettle 1 is installed with a top cover 6 sealed therewith.

[0024] Preferably, in one embodiment, Figure 1-Figure 2 As shown, a positioning groove 12 is provided on the outer side of the top surface of the inner tank 11, and the positioning groove 12 is a rectangular groove. The top cover 6 is a rectangular plate as a whole, and a positioning plate 63 matching the inner diameter of the positioning groove 12 is installed on its inner bottom surface, which provides positioning and auxiliary sealing effects when the top cover 6 and the distillation kettle 1 are installed.

[0025] Preferably, in one embodiment, Figure 2-Figure 3 As shown, a feed pipe 61 is installed on the left side of the top surface of the top cover 6, and the feed pipe 61 is used to add sulfuric acid to be processed in the distillation kettle 1. The feed pipe 61 is equipped with a sealing end. An electric control box 62 is installed on the right top surface of the top cover 6. The electric control box 62 is electrically connected to a heating plate 64 through an electric wire 65. There are multiple heating plates 64, and the heating plates 64 are arranged in a circular array and installed on the inner top surface of the top cover 6. The heating plates 64 are on the inner side of the positioning plate 63. The distillation kettle 1 is located at A heating groove 13 is opened on the outer side of the top surface of the inner groove 11, and the heating plate 64 is inserted and fitted with the heating groove 13. There is no corresponding heating groove 13 at the position of the connecting pipe 3 and the vacuum pump 2. The inner groove 11 is heated evenly by matching the heating plate 64 with the heating groove 13. At the same time, the heating plate 64 is connected to the top cover 6. When the top cover 6 is removed, the heating plate 64 is moved out synchronously, which is convenient for replacement and maintenance of the heating plate 64. Compared with the traditional bottom nested structure, it is more convenient to use.

[0026] Preferably, in one embodiment, Figure 2 , Figure 4 As shown, the condensation mechanism 7 is composed of a diverter plate 71, a diverter tube 72, and a collecting box 77. The diverter plate 71 is a frustum structure as a whole, with a small-diameter end at the upper part and a large-diameter end at the lower part. The upper part of the diverter plate 71 is connected to the connecting tube 3, and a diverter tube 72 is installed on the bottom surface of the diverter plate 71. A plurality of diverter tubes 72 are arranged in a rectangular array. The bottom of the diverter tube 72 is connected to the collecting box 77. The steam is transmitted to the inside of the diverter plate 71 through the connecting tube 3. The diverter plate 71 divides the steam into multiple streams for transmission, so that the distilled gas can be condensed more finely, thereby effectively improving the condensation efficiency.

[0027] Preferably, in one embodiment, Figure 4 As shown, a cold air plate 74 is sleeved on the outside of the tube body of the diverter tube 72. The cold air plates 74 are arranged in four groups at intervals. The rear end of each group is connected to the air conditioner 5 through the air inlet pipe 73. A single cold air plate 74 is arranged corresponding to a single row of diverter tubes 72. A cold air groove 75 is provided on the top surface of the cold air plate 74. The cold air groove 75 is a circular groove with a diameter larger than the diameter of the diverter tube 72. Air holes 76 are provided on the inner walls on both sides of the cold air groove 75. The height of the cold air plate 74 is consistent with the height of the diverter tube 72. When working, steam is introduced into the diverter tube 72, and the air conditioner 5 introduces cold air into the cold air plate 74 so that the air holes 76 are blown directly toward the diverter tube 72 to condense the steam in the diverter tube 72. At the same time, excess cold air is filled in the condensation box 4 to assist the preliminary condensation at the diverter plate 71. The condensed liquid flows into the collection box 77 for storage.

[0028] Working principle of this utility model:

[0029] During operation, sulfuric acid to be processed is placed into the inner tank 11 from the feed pipe 61, the vacuum pump 2 is started to reduce the pressure inside the distillation kettle 1, and the electric control box 62 is started to supply heat to the heating plate 64. The inner tank 11 is evenly heated by matching the heating plate 64 with the heating tank 13. At the same time, the heating plate 64 is connected to the top cover 6. When the top cover 6 is removed, the heating plate 64 is moved out synchronously, which is convenient for replacing and repairing the heating plate 64. Compared with the traditional bottom nested structure, it is more convenient to use. The steam is transmitted to the inside of the diverter plate 71 through the connecting pipe 3. The diverter plate 71 divides the steam into multiple streams for transmission, so that the distilled gas is condensed more finely, and the condensation efficiency is effectively improved. The steam is introduced into the diverter pipe 72, and the air conditioner 5 introduces the cold air into the cold air plate 74, so that the air hole 76 is blown directly to the diverter pipe 72, so that the steam in the diverter pipe 72 is condensed, and at the same time, the excess cold air is filled in the condensation box 4 to assist the preliminary condensation at the diverter plate 71, and the condensed liquid flows into the collection box 77 for storage.

[0030] The above embodiment is only one of the preferred implementation modes of the present utility model and should not be used to limit the protection scope of the present utility model. Any changes or modifications that are made to the main design concept and spirit of the present utility model without any substantive significance, as long as the technical problems solved are still consistent with the present utility model, should be included in the protection scope of the present utility model.

Claims

1. A vacuum distillation apparatus for electronic grade sulfuric acid, characterized in that: include: Still; A vacuum pump connected to the interior of the distillation kettle is installed on the upper left side of the distillation kettle, and a connecting pipe is installed on the upper right side of the distillation kettle. The other end of the connecting pipe extends to the interior of the condensation box. Both ends of the connecting pipe are sealed. An air cooler is installed on the rear end surface of the condensation box, and the air cooler is connected to the condensation mechanism inside the condensation box. An inner tank is opened inside the distillation kettle. The inner tank is a cylindrical structure as a whole, which is used to provide a space for heating and gasifying sulfuric acid. The top surface of the distillation kettle is equipped with a top cover that is sealed and connected to it.

2. The vacuum distillation apparatus for electronic grade sulfuric acid according to claim 1, characterized in that: A positioning groove is provided on the outer side of the top surface of the inner groove, and the positioning groove is a rectangular groove. The top cover is a rectangular plate as a whole, and a positioning plate matching the inner diameter of the positioning groove is installed on its inner bottom surface.

3. A vacuum distillation apparatus for electronic grade sulfuric acid according to claim 2, characterized in that: A feed pipe is installed on the left side of the top surface of the top cover, and the feed pipe is configured with a sealing end. An electric control box is installed on the right top surface of the top cover, and the electric control box is electrically connected to the heating plate through electric wires. There are multiple heating plates, and the heating plates are arranged in a circular array and installed on the inner top surface of the top cover. The heating plate is on the inner side of the positioning plate. The distillation kettle is located on the outer side of the top surface of the inner tank and a heating groove is provided. The heating plate is plug-fitted and connected to the heating groove, and no corresponding heating groove is provided at the position of the connecting pipe and the vacuum pump.

4. The vacuum distillation apparatus for electronic grade sulfuric acid according to claim 1, characterized in that: The condensation mechanism is composed of a diverter plate, a diverter tube, and a collection box. The diverter plate is a frustum structure with a small-diameter end at the top and a large-diameter end at the bottom. The top of the diverter plate is connected to the connecting tube, and a diverter tube is installed on the bottom of the diverter plate. A plurality of diverter tubes are arranged in a rectangular array, and the bottom of the diverter tube is connected to the collection box.

5. The vacuum distillation apparatus for electronic grade sulfuric acid according to claim 4, characterized in that: A cold air plate is sleeved on the outside of the pipe body of the diverter pipe, and four groups of cold air plates are arranged at intervals. The rear end of each group is connected to the air conditioner through an air inlet pipe. A single cold air plate corresponds to a single row of diverter pipes. A cold air groove is opened on the top surface of the cold air plate. The cold air groove is a circular groove, and its diameter is larger than the diameter of the diverter pipe. Air holes are opened on the inner walls on both sides of the cold air groove, and the height of the cold air plate is consistent with the height of the diverter pipe.

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