CN215326932U

CN215326932U - Equipment for removing impurity arsenic in high-purity hydrochloric acid

Info

Publication number: CN215326932U
Application number: CN202121059105.6U
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: 2021-12-28
Anticipated expiration: 2031-05-17

Abstract

The utility model discloses equipment for removing arsenic impurity in high-purity hydrochloric acid, which comprises a raw material tank, a gas tank, a reaction kettle, a filter chamber and a finished product tank, wherein the raw material tank and the gas tank are respectively arranged on the left side of the reaction kettle, an acid inlet pipe is arranged between the raw material tank and the reaction kettle, a first control valve is arranged on the outer side of the acid inlet pipe, a gas inlet pipe is arranged between the gas tank and the reaction kettle, a second control valve is arranged on the outer side of the gas inlet pipe, a stirring device is arranged in the reaction kettle, the filter chamber is arranged at the bottom of the reaction kettle, and a guide pipe is arranged between the filter chamber and the reaction kettle. The equipment for removing the arsenic impurity in the high-purity hydrochloric acid is novel in structure and ingenious in conception, the hydrogen sulfide gas is introduced into the hydrochloric acid to react with the arsenic ion impurity in the hydrochloric acid, the arsenic impurity in the high-purity hydrochloric acid can be effectively removed, the arsenic impurity reaches the use standard of a product, and meanwhile, the removal efficiency of the arsenic impurity is improved and the productivity is improved by additionally arranging the stirring device.

Description

Equipment for removing impurity arsenic in high-purity hydrochloric acid

Technical Field

The utility model relates to the technical field of chemical industry, in particular to equipment for removing arsenic impurity in high-purity hydrochloric acid.

Background

At present, the industrial high-purity hydrochloric acid is prepared by burning high-purity hydrogen and high-purity chlorine, but in the burning process of the hydrogen and the chlorine and under the corrosivity of the chlorine, the hydrochloric acid is doped with a plurality of impurity ions in the production process, and the impurity ions must be removed to meet the use requirement.

Because hydrochloric acid has a low boiling point and is easy to distill, and has a certain difference with salt boiling points of other impurity ions, the impurity ions mixed in the hydrochloric acid are usually removed by a distillation method to reach the product standard, but arsenic ions which are trivalent and positive in the hydrochloric acid impurities are combined with chloride ions to form arsenic trichloride, and the boiling point of the arsenic ions is very similar to the temperature during hydrochloric acid distillation, so that the arsenic ions cannot be removed by a distillation method, and the product is unqualified if the impurity ions are removed only by the distillation method.

SUMMERY OF THE UTILITY MODEL

Aiming at the situation and overcoming the defects of the prior art, the utility model provides equipment for removing the arsenic impurity in the high-purity hydrochloric acid, which has novel structure and ingenious conception, can effectively remove the arsenic impurity in the high-purity hydrochloric acid by introducing hydrogen sulfide gas into the hydrochloric acid to react with the arsenic ion impurity in the hydrochloric acid, so that the arsenic impurity reaches the use standard of products, and simultaneously improves the removal efficiency of the arsenic impurity and the productivity by additionally arranging a stirring device.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an impurity arsenic's removal equipment in high-purity hydrochloric acid, includes head tank, gas pitcher, reation kettle, filter chamber and finished product jar, head tank and gas pitcher set up respectively in reation kettle's left side, and are provided with between head tank and the reation kettle and advance the acid pipe, the outside of advancing the acid pipe is provided with first control valve, be provided with the intake pipe between gas pitcher and the reation kettle, the outside of intake pipe is provided with the second control valve, reation kettle's inside is provided with agitating unit, the filter chamber sets up in reation kettle's bottom, and is provided with the pipe between filter chamber and the reation kettle, the outside of pipe is provided with the third control valve, be provided with the branch pipe between filter chamber and the finished product jar.

Preferably, the top of the reaction kettle is provided with a pressure regulating valve.

Preferably, an activated carbon net is arranged inside the filtering chamber.

Preferably, the insides of two sides of the conduit are respectively provided with a filter screen.

Preferably, the stirring device comprises a motor fixedly connected to the top of the reaction kettle, the bottom of the motor is fixedly connected with a stirring shaft extending to the inside of the reaction kettle, and the outer side of the stirring shaft is fixedly connected with stirring blades.

The utility model has the beneficial effects that:

through letting in hydrogen sulfide gas in hydrochloric acid, make it react with the impurity arsenic ion in the hydrochloric acid, generate yellow flocculent arsenic trisulfide and deposit to the content of the arsenic ion in the hydrochloric acid that has significantly reduced makes it reach product service standard, through addding agitating unit, has improved the efficiency of getting rid of arsenic ion impurity simultaneously, has improved the productivity.

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 view of the internal structural components of the reaction vessel of the present invention.

Reference numbers in the figures: 1. a raw material tank; 2. a gas tank; 3. a reaction kettle; 4. a filtering chamber; 5. a finished product tank; 6. a pressure regulating valve; 7. an acid inlet pipe; 8. a first control valve; 9. an air inlet pipe; 10. a second control valve; 11. a conduit; 12. a third control valve; 13. filtering with a screen; 14. an activated carbon mesh; 15. a branch pipe; 16. a motor; 17. a stirring shaft; 18. stirring the leaves.

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.

Example one

As shown in fig. 1-2, the apparatus for removing arsenic impurity from high purity hydrochloric acid comprises a raw material tank 1, a gas tank 2, a reaction kettle 3, a filter chamber 4 and a finished product tank 5, wherein the raw material tank 1 and the gas tank 2 are respectively arranged on the left side of the reaction kettle 3, an acid inlet pipe 7 is arranged between the raw material tank 1 and the reaction kettle 3, a first control valve 8 is arranged on the outer side of the acid inlet pipe 7, an air inlet pipe 9 is arranged between the gas tank 2 and the reaction kettle 3, a second control valve 10 is arranged on the outer side of the air inlet pipe 9, a stirring device is arranged inside the reaction kettle 3, the stirring device comprises a motor 16 fixedly connected to the top of the reaction kettle 3, a stirring shaft 17 extending into the reaction kettle 3 is fixedly connected to the bottom of the motor 16, a stirring blade 18 is fixedly connected to the outer side of the stirring shaft 17, the filter chamber 4 is arranged at the bottom of the reaction kettle 3, and a conduit 11 is arranged between the filter chamber 4 and the reaction kettle 3, the inside of the both sides of pipe 11 is provided with filter screen 13 respectively, and the outside of pipe 11 is provided with third control valve 12, and the inside of filter chamber 4 is provided with activated carbon net 14, filters the arsenic trisulfide deposit through activated carbon net 14, is provided with branch pipe 15 between filter chamber 4 and the finished product jar 5.

The specific use steps are as follows:

1. respectively opening the first control valve 8 and the second control valve 10 to enable the hydrochloric acid subjected to distillation treatment in the raw material tank 1 to enter the reaction kettle 3 through the acid inlet pipe 7, and enabling the hydrogen sulfide gas in the gas tank 2 to enter the reaction kettle 3 through the gas inlet pipe 9, wherein the introduction amount of the hydrogen sulfide gas is determined according to the arsenic content in the hydrochloric acid;

2. starting the motor 16, driving the stirring shaft 17 to rotate through the motor 16, further driving the stirring blade 18 to rotate, promoting the reaction between the hydrogen sulfide gas and the hydrochloric acid, and generating hydrogen chloride gas and yellow flocculent arsenic trisulfide precipitate;

3. the reaction equation is as follows: 2AsCl3+3H2S ═ As2S3+6HCl

4. And opening a third control valve 12, allowing the hydrochloric acid solution in the reaction kettle 3 to enter a filter chamber 4 after primary filtration through a filter screen 13 in a conduit 11, and then entering a finished product tank 5 through a branch pipe 15 after secondary filtration and adsorption through an activated carbon net 14 for storage.

Example two

In order to maintain the stable pressure in the reaction vessel 3, referring to fig. 1, as another preferred embodiment, the difference from the first embodiment is that a pressure regulating valve 6 is disposed on the top of the reaction vessel 3, and the pressure in the reaction vessel 3 is regulated by the pressure regulating valve 6, so as to ensure the safety and stability of the production process.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the utility model as defined by the appended claims. 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. The utility model provides an impurity arsenic's removal equipment in high-purity hydrochloric acid, includes head tank (1), gas pitcher (2), reation kettle (3), filter chamber (4) and finished product jar (5), its characterized in that: raw material tank (1) and gas pitcher (2) set up respectively in the left side of reation kettle (3), and be provided with between raw material tank (1) and reation kettle (3) and advance sour pipe (7), the outside of advancing sour pipe (7) is provided with first control valve (8), be provided with intake pipe (9) between gas pitcher (2) and reation kettle (3), the outside of intake pipe (9) is provided with second control valve (10), the inside of reation kettle (3) is provided with agitating unit, filter chamber (4) set up the bottom at reation kettle (3), and be provided with pipe (11) between filter chamber (4) and reation kettle (3), the outside of pipe (11) is provided with third control valve (12), be provided with branch pipe (15) between filter chamber (4) and finished product jar (5).

2. The apparatus for removing arsenic impurity from high-purity hydrochloric acid according to claim 1, wherein: and the top of the reaction kettle (3) is provided with a pressure regulating valve (6).

3. The apparatus for removing arsenic impurity from high-purity hydrochloric acid according to claim 1, wherein: an activated carbon net (14) is arranged inside the filtering chamber (4).

4. The apparatus for removing arsenic impurity from high-purity hydrochloric acid according to claim 1, wherein: and filter screens (13) are respectively arranged inside two sides of the conduit (11).

5. The apparatus for removing arsenic impurity from high-purity hydrochloric acid according to claim 1, wherein: agitating unit includes motor (16) of fixed connection at reation kettle (3) top, the bottom fixedly connected with of motor (16) extends to inside (mixing) shaft (17) of reation kettle (3), the outside fixedly connected with stirring leaf (18) of (mixing) shaft (17).