CN216073081U

CN216073081U - Industrial grade nitric acid and electronic grade nitric acid co-production line

Info

Publication number: CN216073081U
Application number: CN202121059157.3U
Authority: CN
Inventors: 王晶; 王明; 沈飞
Original assignee: Wuxi Dongfeng New Energy Technology Co ltd
Current assignee: Wuxi Dongfeng New Energy Technology Co ltd
Priority date: 2021-05-17
Filing date: 2021-05-17
Publication date: 2022-03-18
Anticipated expiration: 2031-05-17

Abstract

The utility model discloses a co-production line of industrial-grade nitric acid and electronic-grade nitric acid, which comprises a distillation tower, wherein the distillation tower is connected with an air inlet of an electronic-grade nitric acid preparation tower through a first pipeline, a discharge hole of the electronic-grade nitric acid preparation tower is connected with a rectification tower through a second pipeline, a tail gas outlet of the electronic-grade nitric acid preparation tower is connected with an air inlet of a tail gas absorption tower through a third pipeline, a pressurizing fan is installed on the third pipeline, and the discharge hole of the tail gas absorption tower is connected with a decoloring tank through a fourth pipeline. The utility model has novel structure, ingenious conception, lower consumption and simple process, can realize the joint output of industrial-grade nitric acid and electronic-grade nitric acid, has high production efficiency and has good social benefit and economic benefit.

Description

Industrial grade nitric acid and electronic grade nitric acid co-production line

Technical Field

The utility model relates to the technical field of nitric acid co-production, in particular to a production line for co-production of industrial-grade nitric acid and electronic-grade nitric acid.

Background

At present, reagent-grade nitric acid is generally adopted as a raw material in the purification of electronic-grade nitric acid in China, and the electronic nitric acid finished product is obtained through secondary purification by a heating method. Electronic grade nitric acid is one of nitric acid products, and is mainly used for etching in the electronic industry. In terms of concentration, the requirement of the electronic grade nitric acid is not special, and is generally between 65 and 70 percent. However, the requirements are particularly high in terms of particulate matters, various metal impurities and the like, and are far higher than industrial-grade nitric acid.

In the prior art, a nitric acid production line generally produces industrial-grade nitric acid or electronic-grade nitric acid independently, cannot produce industrial-grade nitric acid or electronic-grade nitric acid simultaneously, and has a complex process. Therefore, it is necessary to design a co-production line of industrial-grade nitric acid and electronic-grade nitric acid.

SUMMERY OF THE UTILITY MODEL

Aiming at the situation, in order to overcome the defects of the prior art, the utility model provides the industrial-grade nitric acid and electronic-grade nitric acid co-production line, which has the advantages of novel structure, ingenious design, lower consumption and simple process, can realize the co-production of the industrial-grade nitric acid and the electronic-grade nitric acid, has high production efficiency and good social benefit and economic benefit.

In order to achieve the purpose, the utility model provides the following technical scheme: industrial grade nitric acid and electron level nitric acid coproduction production line, including the distillation column, the distillation column is connected through the air inlet of first pipeline with electron level nitric acid preparation tower, the discharge gate of electron level nitric acid preparation tower passes through the second pipeline and is connected with the rectifying column, the tail gas export of electron level nitric acid preparation tower is connected with the air inlet of tail gas absorption tower through the third pipeline, install the booster fan on the third pipeline, the discharge gate of tail gas absorption tower passes through the fourth pipeline and is connected with the decoloration jar.

Preferably, pipeline valves are mounted on the first pipeline, the second pipeline, the third pipeline and the fourth pipeline.

Preferably, the heating assembly is installed on the inner wall of the distillation tower, and the ultrasonic vibration assembly is symmetrically installed at the bottom of the distillation tower.

Preferably, the heating assembly comprises a water bath tank, a heat conducting sheet and an electric heating sheet;

the water bath box is fixed on the inner wall of the distillation tower, the electric heating sheets are installed inside the water bath box, and the plurality of heat conducting sheets are installed on the outer wall of the water bath box at equal intervals.

Preferably, a temperature sensor is installed on the inner wall of the water bath tank, a temperature controller is installed on the outer wall of the distillation tower, the temperature sensor is electrically connected with the input end of the temperature controller, and the output end of the temperature controller is electrically connected with the electric heating sheet.

The utility model has the beneficial effects that:

1. the consumption is low, the process is simple, the joint output of industrial nitric acid and electronic nitric acid can be realized, the production efficiency is high, and good social benefit and economic benefit are achieved;

2. the reagent-grade nitric acid in the distillation tower is heated by the arranged heating assembly, and the ultrasonic vibration assembly works to vibrate the reagent-grade nitric acid, so that the heating is more uniform, and the distillation efficiency of the reagent-grade nitric acid is improved;

3. through the electric heat piece work that sets up, heat the inside water of water bath, heat reagent level nitric acid through the mode of heat transfer, the heating homogeneity is good.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic view of the overall plan structure of the present invention;

FIG. 2 is a schematic sectional plan view of a distillation column according to the present invention;

reference numbers in the figures: 1. a distillation column; 2. a first conduit; 3. an electronic grade nitric acid preparation tower; 4. a second conduit; 5. a rectifying tower; 6. a third pipeline; 7. a booster fan; 8. a tail gas absorption tower; 9. a fourth conduit; 10. a decolorizing tank; 11. a heating assembly; 12. a water bath tank; 13. an ultrasonic vibration component; 14. a heat conductive sheet; 15. an electric heating sheet; 16. a temperature sensor; 17. a temperature controller; 18. a pipeline valve.

Detailed Description

The technical scheme of the utility model is clearly and completely described in the following with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance.

In the prior art, a nitric acid production line generally produces industrial-grade nitric acid or electronic-grade nitric acid independently, cannot produce industrial-grade nitric acid or electronic-grade nitric acid simultaneously, and has a complex process.

Example one

As shown in fig. 1, the present invention provides the following technical solutions: industrial grade nitric acid and electron level nitric acid coproduction production line, including distillation column 1, distillation column 1 is connected through first pipeline 2 and electron level nitric acid preparation tower 3's air inlet, electron level nitric acid preparation tower 3's discharge gate passes through second pipeline 4 and is connected with rectifying column 5, electron level nitric acid preparation tower 3's tail gas export is connected through third pipeline 6 and tail gas absorption tower 8's air inlet, install booster fan 7 on the third pipeline 6, tail gas absorption tower 8's discharge gate passes through fourth pipeline 9 and is connected with decoloration jar 10.

Preferably, the first pipeline 2, the second pipeline 4, the third pipeline 6 and the fourth pipeline 9 are all provided with pipeline valves 18, the tail gas obtained by distilling the reagent-grade nitric acid through the distillation tower 1 enters the electronic-grade nitric acid preparation tower 3 and is in reverse contact with the ultrapure water at the upper part of the electronic-grade nitric acid preparation tower 3 to obtain an electronic-grade crude nitric acid product, the electronic-grade crude nitric acid product is rectified through the rectification tower 5 to obtain electronic-grade nitric acid, the nitric acid tail gas which is not absorbed in the electronic-grade nitric acid preparation tower 3 is pressurized through the pressurization fan 7 and enters the lower part of the tail gas absorption tower 8 and is in reverse contact with the desalted water at the upper part of the tail gas absorption tower 8 to obtain an industrial-grade crude nitric acid product, and then the industrial-grade crude nitric acid product is subjected to decolorization treatment through the decolorization tank 10 to obtain the industrial-grade nitric acid, so that the consumption is low, the process is simple, and the joint production of the industrial-grade nitric acid and the electronic-grade nitric acid can be realized, high production efficiency and good social and economic benefits.

Example two

In the first embodiment, the distillation tower 1 has low distillation efficiency, and referring to fig. 2, as another preferred embodiment, the difference from the first embodiment is that a heating assembly 11 is installed on the inner wall of the distillation tower 1, an ultrasonic vibration assembly 13 is symmetrically installed at the bottom of the distillation tower 1, the reagent-grade nitric acid in the distillation tower 1 is heated by the installed heating assembly 11, and the ultrasonic vibration assembly 13 works to vibrate the reagent-grade nitric acid, so that the heating is more uniform, and the distillation efficiency of the reagent-grade nitric acid is improved.

EXAMPLE III

In the first embodiment, the heating is performed by using an electric bar, and the heating uniformity is poor, referring to fig. 2, as another preferred embodiment, the difference from the first embodiment is that the heating assembly 11 comprises a water bath 12, a heat conducting sheet 14 and an electric heating sheet 15;

the inner wall at distillation column 1 is fixed to water bath 12, and the internally mounted of water bath 12 has electric heat piece 15, and a plurality of conducting strip 14 is installed to the outer wall equidistance of water bath 12, through the electric heat piece 15 work that sets up, heats the inside water of water bath 12, heats reagent level nitric acid through the mode of heat transfer, and the heating homogeneity is good.

Example four

Referring to fig. 2, as another preferred embodiment, the difference from the first embodiment is that a temperature sensor 16 is installed on the inner wall of the water bath tank 12, a temperature controller 17 is installed on the outer wall of the distillation tower 1, the temperature sensor 16 is electrically connected to the input end of the temperature controller 17, the output end of the temperature controller 17 is electrically connected to the electric heating sheet 15, and the temperature sensor 16 is arranged to facilitate accurate monitoring of the temperature inside the water bath tank 12.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Industrial grade nitric acid and electron-grade nitric acid coproduction production line, including distillation column (1), its characterized in that: distillation column (1) is connected through the air inlet of first pipeline (2) and electron level nitric acid preparation tower (3), the discharge gate of electron level nitric acid preparation tower (3) passes through second pipeline (4) and is connected with rectifying column (5), the tail gas export of electron level nitric acid preparation tower (3) is connected with the air inlet of tail gas absorption tower (8) through third pipeline (6), install booster fan (7) on third pipeline (6), the discharge gate of tail gas absorption tower (8) passes through fourth pipeline (9) and is connected with decoloration jar (10).

2. The combined production line of industrial-grade nitric acid and electronic-grade nitric acid according to claim 1, comprising: and pipeline valves (18) are arranged on the first pipeline (2), the second pipeline (4), the third pipeline (6) and the fourth pipeline (9).

3. The combined production line of industrial-grade nitric acid and electronic-grade nitric acid according to claim 1, comprising: heating components (11) are installed on the inner wall of the distillation tower (1), and ultrasonic vibration components (13) are symmetrically installed at the bottom of the distillation tower (1).

4. The combined production line of industrial-grade nitric acid and electronic-grade nitric acid according to claim 3, characterized in that: the heating component (11) comprises a water bath box (12), a heat conducting sheet (14) and an electric heating sheet (15);

the water bath box (12) is fixed on the inner wall of the distillation tower (1), the electric heating pieces (15) are installed inside the water bath box (12), and a plurality of heat conducting pieces (14) are installed on the outer wall of the water bath box (12) at equal intervals.

5. The combined production line of industrial-grade nitric acid and electronic-grade nitric acid according to claim 4, characterized in that: temperature sensor (16) are installed to the inner wall of water bath (12), temperature controller (17) are installed to the outer wall of distillation column (1), the input of temperature sensor (16) electric connection temperature controller (17), the output electric connection electric heat piece (15) of temperature controller (17).