CN215137011U

CN215137011U - Rectifying tower for hydrogen fluoride production

Info

Publication number: CN215137011U
Application number: CN202121516993.XU
Authority: CN
Inventors: 杜荣星; 吴潇
Original assignee: Jiangxi Tianxing Chemical Co ltd
Current assignee: Jiangxi Tianxing Chemical Co ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2021-12-14
Anticipated expiration: 2031-07-05

Abstract

The utility model discloses a rectifying column is used in hydrogen fluoride production belongs to chemical production technical field, its technical scheme main points are, including the rectifying column body, the steam outlet has been seted up on the rectifying column body, the liquid outlet, the inlet, steam inlet and feed inlet, the inside of rectifying column body is equipped with the polylith column plate, all be equipped with overflow weir and a plurality of bubble cap mechanism on every column plate, bubble cap mechanism includes steam pipe and shroud, the steam pipe runs through the setting on the column plate, the removable cover of shroud nevertheless does not contact with the column plate in the outside of steam pipe, and each other contactless between steam pipe and the shroud, leave the clearance between the two, the fixed connecting plate that is provided with on the inside wall of shroud, the middle part of connecting plate runs through and is provided with the connecting pipe, the connecting pipe inserts the inside of steam pipe and pastes together each other. The rectifying tower for producing the hydrogen fluoride can effectively prolong the time of vapor flowing through the bubble cap mechanism, thereby improving the rectifying effect.

Description

Rectifying tower for hydrogen fluoride production

Technical Field

The utility model relates to a chemical production technical field specifically is a rectifying column is used in hydrogen fluoride production.

Background

The hydrogen fluoride is an inorganic acid, has a chemical formula of HF, is a colorless toxic gas with pungent smell in a normal state, has very strong hygroscopicity, generates white smoke when contacting air, is easy to dissolve in water, and can be dissolved with water infinitely to form hydrofluoric acid. Hydrogen fluoride has hydrogen bonding between molecules and may exhibit some unusual properties, such as a much higher boiling point than other hydrogen halides. Hydrogen fluoride is chemically very reactive and can react with many compounds, with hydrogen fluoride being a weak acid as a solute and pure hydrogen fluoride being a strong acid. The rectification method is a common method for preparing hydrogen fluoride, and the method needs to be completed by virtue of a rectification tower, the rectification tower on the market comprises a rectification tower body, a steam outlet, a liquid inlet, a steam inlet and a feed inlet are formed in the rectification tower body, a plurality of tower plates are arranged in the rectification tower body, and each tower plate is provided with an overflow weir and a plurality of bubble cap mechanisms.

The rectification principle is as follows: a reboiler located at the bottom of the column partially vaporizes the liquid, with the vapor rising up the column and the remaining liquid being the bottom product. The feed is added in the middle of the column, the liquid in the feed descends the column together with the liquid from the upper column section, and the vapor in the feed ascends the column together with the vapor from the lower column section. In the whole rectifying tower, gas-liquid two phases are in countercurrent contact to carry out interphase mass transfer. The more volatile components in the liquid phase enter the vapor phase and the less volatile components in the vapor phase pass into the liquid phase. For systems that do not form azeotropes, the distillate will be the high purity volatile component and the bottoms will be the high purity nonvolatile component, provided that it is properly designed and operated. The tower section above the feed inlet is used for further concentrating volatile components in the ascending vapor and is called as a rectifying section; the section of the column below the feed opening, which extracts the volatile components from the descending liquid, is referred to as the stripping section. The combination of the two stages of operation allows for more complete separation of the two components of the liquid mixture to produce two products of the desired purity.

The traditional rectifying tower has the following defects: the vapor flows through the bubble cap mechanism for a short time, so that the vapor-liquid two-phase countercurrent contact time is short, and the rectification effect has a larger lifting space.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a rectifying column is used in hydrogen fluoride production, this kind of rectifying column is used in hydrogen fluoride production can effectively prolong the time that the bubble cap mechanism was flowed through to steam to promote the rectification effect.

The utility model discloses specifically adopt following technical scheme: a rectifying tower for producing hydrogen fluoride comprises a rectifying tower body, wherein a steam outlet, a liquid inlet, a steam inlet and a feed inlet are formed in the rectifying tower body, a plurality of tower plates are arranged in the rectifying tower body, each tower plate is provided with an overflow weir and a plurality of bubble cap mechanisms, each bubble cap mechanism comprises a steam pipe and a cover cap, the steam pipe penetrates through the tower plates, the cover caps are detachably covered outside the steam pipe but are not in contact with the tower plates, the steam pipe and the cover caps are not in contact with each other, a gap is reserved between the steam pipe and the cover caps, a connecting plate is fixedly arranged on the inner side wall of each cover cap, a connecting pipe penetrates through the middle of the connecting plate, the connecting pipe is inserted into the steam pipe and is mutually attached together, and a plurality of steam outlet holes are formed in the position of the connecting plate between the steam pipe and the cover caps, a plurality of tough blocking pieces are arranged on the outer side wall of the steam pipe and the inner side wall of the cover cap, and the plurality of tough blocking pieces on the steam pipe and the plurality of tough blocking pieces on the cover cap are distributed in a staggered mode; the height of the steam pipe is higher than that of the overflow weir, and the height of one end of the cover close to the tower plate is lower than that of the overflow weir.

Optionally, the side wall of the connecting pipe extends and protrudes away from the steam pipe to form a convex pipe, and the convex pipe is not in contact with the cover.

Optionally, the wall thickness of the convex pipe is greater than that of the connecting pipe, the inner walls of the convex pipe and the connecting pipe are flush, and the outer wall of the convex pipe and the inner wall of the connecting pipe are step-shaped.

Optionally, the steam pipe and the connecting pipe are both in a circular tubular structure and are in threaded fit connection.

Optionally, the lower end of the inner side of the connecting pipe is in a slope shape.

Optionally, a plurality of the flexible baffles are uniformly distributed at equal intervals.

To sum up, the utility model discloses following beneficial effect has:

this kind of rectifying column is used in hydrogen fluoride production, steam is when passing bubble cap mechanism, steam pipe and connecting pipe flow through in proper order, steam passes a plurality of steam outlet after flowing out from the connecting pipe, let in below the liquid level to liquid medium after passing steam outlet, this moment under the guide effect of a plurality of toughness separation blades, steam flows through and produces a large amount of bubbles in liquid medium along S type route, final steam flows out and continues upwards flowing in following the shroud, therefore, the time that steam flows through bubble cap mechanism has effectively been prolonged, thereby promote the rectification effect.

Drawings

Fig. 1 is a schematic view of the internal structure of the present invention;

fig. 2 is an enlarged view of fig. 1A.

In the figure: 1. a rectifying column body; 2. a steam outlet; 3. a liquid outlet; 4. a liquid inlet; 5. a steam inlet; 6. a feed inlet; 7. a column plate; 8. an overflow weir; 9. a blister mechanism; 901. a steam pipe; 902. a cover; 903. a connecting plate; 904. a steam outlet; 905. a connecting pipe; 906. a convex pipe; 907. a flexible baffle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, a rectifying tower for producing hydrogen fluoride comprises a rectifying tower body 1, wherein the rectifying tower body 1 is provided with a steam outlet 2, a liquid outlet 3, a liquid inlet 4, a steam inlet 5 and a feed inlet 6, a plurality of trays 7 are arranged inside the rectifying tower body 1, each tray 7 is provided with an overflow weir 8 and a plurality of bubble cap mechanisms 9, each bubble cap mechanism 9 comprises a steam pipe 901 and a cover cap 902, the steam pipe 901 is arranged on the tray 7 in a penetrating way, the cover cap 902 is detachably covered outside the steam pipe 901 but not contacted with the tray 7, the steam pipe 901 and the cover cap 902 are not contacted with each other, a gap is reserved between the steam pipe 901 and the cover cap 902, a connecting plate 903 is fixedly arranged on the inner side wall of the cover cap 902, a connecting pipe 905 is arranged in the middle of the connecting plate 903 in a penetrating way, the connecting pipe 905 is inserted into the steam pipe 901 and mutually attached together, a plurality of steam outlet holes 904 are arranged at the connecting plate 903 positioned between the steam pipe 901 and the cover cap 902, the outer side wall of the steam pipe 901 and the inner side wall of the cover 902 are both provided with a plurality of flexible blocking pieces 907, and the flexible blocking pieces 907 on the steam pipe 901 and the flexible blocking pieces 907 on the cover 902 are distributed in a staggered manner; the height of steam pipe 901 is higher than weir 8, and the height of the end of shroud 902 near tray 7 is lower than weir 8. Through the technical scheme, during work, steam is introduced into the rectifying tower body 1 through the steam inlet 5, the steam flows upwards, during the period, the steam passes through the tower plate 7 through the bubble cap mechanism 9 and finally flows out of the rectifying tower body 1 through the steam outlet 2, meanwhile, a liquid medium is introduced into the rectifying tower body 1 through the liquid inlet 4, the liquid medium flows downwards onto the tower plate 7 under the action of gravity, when the liquid level of the liquid medium on the tower plate 7 is higher than the overflow weir 8, the liquid medium overflows from the tower plate 7 and flows to the other tower plate 7 positioned below, during the period, a liquid medium layer with a certain thickness is formed on each tower plate 7, and finally the liquid medium flows out of the rectifying tower body 1 through the liquid outlet 3, during the period, raw materials to be rectified are injected into the rectifying tower body 1 through the feed inlet 6, the raw material is contacted with steam and heated to volatilize, volatile components in the raw material flow upwards along with the steam, and non-volatile components in the raw material flow downwards along with a liquid medium, so that the raw material is rectified, the steam flows through a steam pipe 901 and a connecting pipe 905 in sequence when passing through a bubble cap mechanism 9, the steam flows out of the connecting pipe 905 and then passes through a plurality of steam outlet holes 904, the steam passes through the steam outlet holes 904 and then is introduced below the liquid level of the liquid medium, at the moment, under the guiding action of a plurality of flexible blocking pieces 907, the steam flows through the liquid medium along an S-shaped path to generate a large number of bubbles, and finally the steam flows out of the cover 902 and continues to flow upwards, so that the time of the steam flowing through the bubble cap mechanism 9 is effectively prolonged, and the rectification effect is improved.

Alternatively, as shown in fig. 2, the side wall of the connecting pipe 905 is protruded away from the steam pipe 901 to form a convex pipe 906, the convex pipe 906 does not contact with the cover 902, a large amount of bubbles are generated when the steam is introduced into the liquid medium, the liquid medium is easily splashed during the bubble introduction, and the convex pipe 906 serves as a barrier to the splashed liquid medium, so that the splashed liquid medium does not affect the introduction of the steam into the bubble cap mechanism.

Optionally, as shown in fig. 2, the wall thickness of the protruding tube 906 is greater than that of the connecting tube 905, the inner walls of the protruding tube 906 and the connecting tube 905 are flush, and the outer wall of the protruding tube 906 is stepped, wherein the protruding tube 906 plays a role in limiting the insertion of the connecting tube 905 into the steam tube 901.

Optionally, the steam pipe 901 and the connecting pipe 905 are both in a circular tubular structure, and the two are in threaded fit connection, so that the steam pipe 901 and the cover 902 are very convenient to disassemble and assemble.

Alternatively, as shown in fig. 2, the lower end of the inner side of the connection pipe 905 is sloped, which effectively reduces the resistance when steam passes from the steam pipe 901 into the connection pipe 905.

Optionally, the plurality of flexible baffles 907 are uniformly distributed at equal intervals, so that the steam distribution is more uniform.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a rectifying column is used in hydrogen fluoride production, includes rectifying column body (1), steam outlet (2), liquid outlet (3), inlet (4), steam inlet (5) and feed inlet (6) have been seted up on rectifying column body (1), the inside of rectifying column body (1) is equipped with polylith column plate (7), every all be equipped with overflow weir (8) and a plurality of bubble cap mechanism (9), its characterized in that on column plate (7):

the bubble cap mechanism (9) comprises a steam pipe (901) and a cover cap (902), the steam pipe (901) penetrates through the tower plate (7), the cover cap (902) is detachably covered outside the steam pipe (901) but is not contacted with the tower plate (7), the steam pipe (901) and the cover cap (902) are not contacted with each other, a gap is reserved between the steam pipe (901) and the cover cap (902), a connecting plate (903) is fixedly arranged on the inner side wall of the cover cap (902), a connecting pipe (905) penetrates through the middle of the connecting plate (903), the connecting pipe (905) is inserted into the steam pipe (901) and is mutually attached together, a plurality of steam outlet holes (904) are formed in the position between the steam pipe (901) and the cover cap (902) of the connecting plate (903), a plurality of tough blocking pieces (907) are arranged on the outer side wall of the steam pipe (901) and the inner side wall of the cover cap (902), a plurality of flexible blocking pieces (907) on the steam pipe (901) and a plurality of flexible blocking pieces (907) on the cover cap (902) are distributed in a staggered mode;

the height of the steam pipe (901) is higher than that of the overflow weir (8), and the height of one end of the cover (902) close to the tower plate (7) is lower than that of the overflow weir (8).

2. The rectification column for hydrogen fluoride production according to claim 1, wherein: the side wall of the connecting pipe (905) extends and protrudes towards the direction far away from the steam pipe (901) to form a convex pipe (906), and the convex pipe (906) is not in contact with the cover cap (902).

3. The rectification column for hydrogen fluoride production as claimed in claim 2, wherein: the wall thickness of flange (906) is greater than connecting pipe (905), and the inner wall of the two flushes, and the outer wall is step-like.

4. The rectification column for hydrogen fluoride production according to claim 1, wherein: the steam pipe (901) and the connecting pipe (905) are both in a circular tubular structure and are in threaded fit connection.

5. The rectification column for hydrogen fluoride production according to claim 1, wherein: the lower end of the inner side of the connecting pipe (905) is in a slope shape.

6. The rectification column for hydrogen fluoride production according to claim 1, wherein: a plurality of the flexible baffle plates (907) are uniformly distributed at equal intervals.