CN219481618U

CN219481618U - Recovery double-trihydroxy extraction system for separating medium and trace solvents

Info

Publication number: CN219481618U
Application number: CN202223455300.8U
Authority: CN
Inventors: 可欲明; 於佳; 杨剑; 蔡明华
Original assignee: Kuitun Zhongneng New Material Technology Co ltd
Current assignee: Kuitun Zhongneng New Material Technology Co ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-08-08
Anticipated expiration: 2032-12-23

Abstract

The utility model relates to the technical field of chemical industry, and discloses a recovery double-trihydroxy extraction system for separating medium and trace solvents, which comprises a system pre-mixing storage tank, wherein an outlet of the system pre-mixing storage tank is communicated with a liquid inlet of a sedimentation storage tank; the top solvent outlet of the sedimentation tank is communicated with a solvent recovery device; the bottom water phase outlet of the sedimentation tank is connected with a bottom water phase tank passage, and the bottom liquid outlet of the bottom water phase tank is communicated with the dilute solvent recovery tower; the dilute solvent recovery tower is in transmission connection with the plate frame filtering equipment through a conveying pipe. The utility model extracts ditriazole from the heavy component by-product in the production of TMP by calcium method. In the extraction process, partial processes such as water washing and the like are adopted, so that partial isooctanol can be brought into the crystallization liquid in a water-soluble mode, the chromaticity in the crystallization liquid is higher, and the quality of the ditrimethylol product is reduced. The technology can reduce the chromaticity of the product in the extraction process, ensure that the product quality is better, recover more solvent and reduce the consumption of the solvent.

Description

Recovery double-trihydroxy extraction system for separating medium and trace solvents

Technical Field

The utility model relates to the technical field of chemical industry, in particular to a recovery double-trihydroxy extraction system for separating medium and trace solvents.

Background

The Ditrimethylolpropane (DTMP) is a product which is produced by taking TMP byproduct heavy components as raw materials, adding quantitative ultrapure water to wash ditrimethylolpropane into water phase under the condition that isooctanol extracts internal light components, TMP and other impurities, and carrying out concentration, decoloration and crystallization reaction, is an important organic chemical intermediate and a fine chemical product, and is widely applied in a plurality of fields.

According to the heavy component produced by the calcium method TMP, the new material technology limited company in the quinine adopts solvent extraction, ultra-pure water backwashing, sedimentation separation, rectification concentration, active carbon decolorization, plate frame filtration, sedimentation separation oil, and the production of the ditriazole by a bottom temperature crystallization production device, and the ditriazole rich in the heavy component is extracted.

In the extraction process, partial processes such as water washing and the like are adopted, so that partial isooctanol can be brought into the crystallization liquid in a water-soluble mode, the chromaticity in the crystallization liquid is higher, and the quality of the ditrimethylol product is reduced. The technology can reduce the chromaticity of the product in the extraction process, ensure that the product quality is better, recover more solvent and reduce the consumption of the solvent.

Disclosure of Invention

The utility model aims to provide a recovery double-trihydroxy extraction system for separating medium and trace solvents, which solves the problems that in the background art, partial isooctanol is brought into crystallization liquid in a water-soluble mode due to the adoption of partial processes such as water washing and the like in the extraction process, so that the chromaticity in the crystallization liquid is higher, and the quality of double-trihydroxy products is reduced. The technology can reduce the chromaticity of the product in the extraction process, ensure that the product quality is better, recover more solvent and reduce the solvent consumption.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the double-trihydroxy extraction system for separating medium and trace solvent includes a system pre-mixing tank, the outlet of which is communicated with the liquid inlet of the settling tank; the top solvent outlet of the sedimentation tank is communicated with a solvent recovery device; the bottom water phase outlet of the sedimentation tank is connected with a bottom water phase tank passage, and the bottom liquid outlet of the bottom water phase tank is communicated with the dilute solvent recovery tower; the dilute solvent recovery tower is in transmission connection with the plate frame filtering equipment through a conveying pipe; the liquid outlet of the plate frame filtering equipment is communicated with the inlet of the filtering sedimentation equipment, and the outlet of the filtering sedimentation equipment is communicated with the feed inlet of the crystallization tank; and an activated carbon adding hopper is communicated with the conveying pipe.

As a preferable implementation mode of the utility model, a rectangular feeding pipe is vertically fixed in the middle of the bottom of the activated carbon adding hopper, and the bottom of the rectangular feeding pipe is vertically fixedly communicated with the conveying pipe.

As a preferred embodiment of the utility model, the activated carbon adding hopper is provided with a vibrating motor at the bottom.

As a preferable implementation mode of the utility model, the outer side wall of the conveying pipe is provided with a supporting plate, one end of the supporting plate, which is far away from the conveying pipe, is provided with a gear operation box, a transmission shaft is movably arranged in the gear operation box in a penetrating way, and both ends of the transmission shaft are respectively fixed with an eccentric wheel.

As a preferred implementation mode of the utility model, the eccentric shaft of the eccentric wheel is movably connected with one end of the connecting rod, and the other end of the connecting rod is movably connected with the partition plate which is movably and hermetically inserted into the side wall of the rectangular feeding pipe.

As a preferred embodiment of the utility model, the initial positions of the two eccentric wheels are staggered.

As a preferred implementation mode of the utility model, the part of the transmission shaft arranged in the inner cavity of the gear operation box is fixedly sleeved with the follow-up bevel gear, the supporting plate is provided with a horizontal servo motor to the right, the driving end of the servo motor movably penetrates through the gear operation box, and the driving end of the servo motor is fixedly provided with the driving bevel gear meshed with the follow-up bevel gear.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model relates to a recovery ditrimethylol extraction system for separating medium and trace solvents, which is used for extracting ditrimethylol from heavy components which are byproducts in the production of TMP by a calcium method. In the extraction process, partial processes such as water washing and the like are adopted, so that partial isooctanol can be brought into the crystallization liquid in a water-soluble mode, the chromaticity in the crystallization liquid is higher, and the quality of the ditrimethylol product is reduced. The technology can reduce the chromaticity of the product in the extraction process, ensure that the product quality is better, recover more solvent and reduce the consumption of the solvent.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

FIG. 1 is a front view of a system for recovering a double-trihydroxy extraction for separating medium trace amounts of solvent according to the present utility model;

FIG. 2 is a schematic diagram of an activated carbon addition system of a recovery double-trihydroxy extraction system for separating medium and trace solvents according to the present utility model;

FIG. 3 is an enlarged schematic view of the structure of the recovery ditrimethylol extraction system of FIG. 2 for separating trace amounts of solvent according to the present utility model.

In the figure: 1. a system premix tank; 2. a sedimentation tank; 3. a bottom aqueous phase storage tank; 4. a solvent recovery device; 5. a dilute solvent recovery tower; 6. adding active carbon into a hopper; 7. a plate and frame filtration device; 8. filtering and settling equipment; 9. a crystallization tank; 10. a delivery tube; 11. rectangular feeding pipes; 12. a partition plate; 13. a servo motor; 14. a connecting rod; 15. an eccentric wheel; 16. a gear operation box; 17. a transmission shaft; 18. and a supporting plate.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1, the present utility model provides a technical solution: the double-trihydroxy extraction system for separating medium and trace solvent comprises a system pre-mixing storage tank 1, wherein an outlet of the system pre-mixing storage tank 1 is communicated with a liquid inlet of a sedimentation storage tank 2; the top solvent outlet of the sedimentation tank 2 is communicated with the solvent recovery device 4; the bottom water phase outlet of the sedimentation tank 2 is connected with the bottom water phase tank 3 in a passage way, and the bottom liquid outlet of the bottom water phase tank 3 is communicated with the dilute solvent recovery tower 5; the dilute solvent recovery tower 5 is in transmission connection with the plate frame filtering equipment 7 through a conveying pipe 10; the liquid outlet of the plate frame filtering equipment 7 is communicated with the inlet of the filtering sedimentation equipment 8, and the outlet of the filtering sedimentation equipment 8 is communicated with the feed inlet of the crystallization tank 9; the conveying pipe 10 is communicated with an active carbon adding hopper 6, and a set of sedimentation solvent separating device is additionally arranged between the dilute isooctanol recovery tower and the decolorizing plate frame to reduce isooctanol content in the crystallization liquid so as to reduce other colored organic impurities. Experimental investigation: the crystallization liquid from the dilute isooctanol recovery tower is subjected to first-stage high-temperature sedimentation separation, the temperature is controlled at about 80 ℃, isooctanol in the crystallization liquid and the carried oil phase can be well separated, and the set of sedimentation separation device can well separate isooctanol in the crystallization liquid and organic impurities carried by the isooctanol in a short time.

Referring to fig. 2-3, in a specific embodiment, a rectangular feeding pipe 11 is vertically fixed at a middle position of the bottom of the activated carbon adding hopper 6, and the bottom of the rectangular feeding pipe 11 is vertically fixedly communicated with a conveying pipe 10; the vibrating motor is installed at the bottom of the activated carbon adding hopper 6, and after the activated carbon is stacked in the activated carbon adding hopper 6, the vibrating motor works to be beneficial to discharging.

Referring to fig. 2-3, further, a supporting plate 18 is arranged on the outer side wall of the conveying pipe 10, a gear operation box 16 is installed at one end of the supporting plate 18 far away from the conveying pipe 10, a transmission shaft 17 is movably installed in the gear operation box 16 in a penetrating manner, eccentric wheels 15 are fixed at two ends of the transmission shaft 17, a follow-up bevel gear is fixedly sleeved at a position of the transmission shaft 17, which is arranged in the inner cavity of the gear operation box 16, a horizontal right servo motor 13 is installed on the supporting plate 8, a driving end of the servo motor 13 movably penetrates through the gear operation box 16, a driving bevel gear meshed with the follow-up bevel gear is fixed at the driving end of the servo motor 13, an eccentric shaft of the eccentric wheels 15 is movably connected with one end of a connecting rod 14, and the other end of the connecting rod 14 is movably and hermetically spliced with a partition plate 12 on the side wall of the rectangular feeding pipe 11; the initial positions of the two eccentric wheels 15 are staggered.

It should be noted that the present utility model is a dual-trihydroxy extraction system for separating medium and trace solvents, each component is a universal standard component or a component known to those skilled in the art, and the structure and principle of the dual-trihydroxy extraction system are all known to those skilled in the art through technical manuals or through routine experimental methods.

Working principle: the system TMP recovers heavy components, and solvent and ultrapure water enter a system premixing tank; all materials in the premixing tank enter a sedimentation tank for oil-water separation; the material at the top of the storage tank enters a system solvent for recovery, and the material at the bottom enters a dilute solvent recovery tower for oil-water separation; materials at the bottom of the dilute solvent recovery tower enter a crystallization liquid sedimentation tank, materials at the top enter an oil phase separation system, and materials at the bottom enter an active carbon adding system; the active carbon decoloration system is filtered, the crystallization liquid enters the crystallization tank for crystallization, when the active carbon material is put in, the active carbon material in the active carbon adding hopper 6 enters the conveying pipe 1O from the rectangular putting pipe 11, in the process, the servo motor 13 works to drive the follow-up bevel gear on the transmission shaft 17 to rotate in a meshed manner through the driving bevel gear, so that the two eccentric wheels 15 are mobilized to rotate, and as the eccentric shafts of the two eccentric wheels 15 are distributed in a staggered manner, the two partition plates 12 can take alternate material receiving and discharging measures, and the situation that hot air in the conveying pipe 10 enters the active carbon adding hopper 6 to cause wet nodules is avoided.

Claims

1. A recovery double-trihydroxy extraction system for separating medium and trace solvents is characterized in that: the system comprises a system premixing storage tank (1), wherein an outlet of the system premixing storage tank (1) is communicated with a liquid inlet of a sedimentation storage tank (2); the top solvent outlet of the sedimentation tank (2) is communicated with a solvent recovery device (4);

the bottom water phase outlet of the sedimentation tank (2) is connected with a passage of the bottom water phase tank (3), and the bottom liquid outlet of the bottom water phase tank (3) is communicated with the dilute solvent recovery tower (5);

the dilute solvent recovery tower (5) is in transmission connection with the plate frame filtering equipment (7) through a conveying pipe (10);

the liquid outlet of the plate frame filtering equipment (7) is communicated with the inlet of the filtering sedimentation equipment (8), and the outlet of the filtering sedimentation equipment (8) is communicated with the feed inlet of the crystallization tank (9);

an activated carbon adding hopper (6) is communicated with the conveying pipe (10).

2. The system for separating medium trace amounts of solvent for use in the recovery of ditrimethylol extraction as claimed in claim 1, wherein: a rectangular feeding pipe (11) is vertically fixed at the middle position of the bottom of the activated carbon adding hopper (6), and the bottom of the rectangular feeding pipe (11) is vertically fixedly communicated with a conveying pipe (10).

3. The system for separating medium trace amounts of solvent for use in the recovery of ditrimethylol extraction as claimed in claim 1, wherein: and a vibrating motor is arranged at the bottom of the activated carbon adding hopper (6).

4. The system for separating medium trace amounts of solvent for use in the recovery of ditrimethylol extraction as claimed in claim 1, wherein: the outer side wall of the conveying pipe (10) is provided with a supporting plate (18), one end, away from the conveying pipe (10), of the supporting plate (18) is provided with a gear operation box (16), a transmission shaft (17) is movably installed in the gear operation box (16) in a penetrating mode, and two end portions of the transmission shaft (17) are respectively fixed with an eccentric wheel (15).

5. The system for separating medium trace amounts of solvent according to claim 4, wherein: the eccentric shaft of the eccentric wheel (15) is movably connected with one end of the connecting rod (14), and the other end of the connecting rod (14) is movably connected with the partition plate (12) which is movably and hermetically inserted into the side wall of the rectangular feeding pipe (11).

6. The system for separating medium trace amounts of solvent according to claim 5, wherein: the initial positions of the two eccentric wheels (15) are distributed in a staggered way.

7. The system for separating medium trace amounts of solvent according to claim 4, wherein: the transmission shaft (17) is fixedly sleeved with a follow-up bevel gear at the position of the inner cavity of the gear operation box (16), a horizontal right servo motor (13) is mounted on the supporting plate (18), the driving end of the servo motor (13) movably penetrates through the gear operation box (16), and a driving bevel gear meshed with the follow-up bevel gear is fixed at the driving end of the servo motor (13).