CN219355316U - Extraction device - Google Patents

Abstract

The utility model provides an extraction device, which relates to the technical field of calcium trimethylolpropane production and comprises a solvent tank and a raw liquid tank, wherein the solvent tank is respectively connected with a premixer and an extraction tower through pipelines, the raw liquid tank is connected with the premixer through a pipeline, the premixer is connected with the extraction tower through a pipeline, and two ends of the extraction tower are respectively connected with an extraction phase tank and a raffinate phase tank through pipelines. The heavy items and part of the light items are forcedly mixed in advance through a premixer, and fully contacted in the premixer to increase the contact area of the two items, so that the mass transfer rate is improved, after the two fully mixed liquids are transferred into an extraction tower, the light items with mass transfer are continuously and upwardly flowed into an extraction phase tank in the extraction tower to be extracted, the heavy items in the extraction tower are continuously and downwardly recombined, and are mixed with the light items entering from the lower end again when passing through a filler in the extraction tower, so that secondary mass transfer is completed, non-target substances are prevented from being entrained in the extracted matters, and the extraction efficiency is improved.

Description

Extraction device

Technical Field

The utility model relates to the technical field of calcium method trimethylolpropane production, in particular to an extraction device.

Background

In the production process of the trimethylolpropane by a calcium method, a packing tower type extraction is adopted, and most manufacturers mostly adopt a countercurrent extraction mode to realize mass transfer and separation of target solutes between different liquid phases, but in actual production, the countercurrent extraction mode can lead to the liquid standing separation section of an extraction tower to be greatly shortened, thus influencing the separation of liquid, further leading to entrainment of non-target substances in the extract and influencing the extraction efficiency.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides an extraction device.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: an extraction device comprises a solvent tank and a raw liquid tank;

the solvent tank is respectively connected with a premixer and an extraction tower through pipelines;

the raw liquid tank is connected with the premixer through a pipeline;

the premixer is connected with the extraction tower through a pipeline;

and two ends of the extraction tower are respectively connected with an extraction phase tank and a raffinate phase tank through pipelines.

As a preferred embodiment, the solvent tank and the pipe of the premixer are provided with a solvent pump for pumping the liquid inside the solvent tank, and the liquid inside the solvent tank is pumped by the solvent pump to be injected into the premixer.

As a preferred embodiment, the raw liquid tank and the pipeline of the premixer are provided with a raw liquid pump for pumping liquid in the raw liquid tank, and heavy raw liquid in the raw liquid tank is pumped by the raw liquid pump and injected into the premixer.

As a preferred embodiment, the solvent tank and the extraction tower are provided with a solvent feed pump on the pipeline for extracting the liquid in the solvent tank, and the light solvent in the solvent tank is pumped by the solvent feed pump to be injected into the extraction tower.

As a preferred implementation mode, the extraction phase groove is connected with the top end of the extraction tower through a pipeline, the raffinate phase groove is connected with the bottom end of the extraction tower through a pipeline, the extraction tower adopts a countercurrent extraction mode, heavy items flow out from the lower part of the extraction tower through the raffinate phase groove after passing through a plurality of theoretical stages of the extraction tower, light items flow out from the upper part of the extraction tower through the extract phase groove after passing through a plurality of fillers of the extraction tower, and the heavy items and the light items are fully mixed and contacted when passing through gaps of a plurality of fillers in the extraction tower, so that mass transfer and separation are completed.

As a preferred embodiment, the bottoms of the solvent tank and the raw liquid tank and the outside of the extraction column are provided with heaters, and the solvent tank, the raw liquid tank and the extraction column are preheated by the heaters.

Compared with the prior art, the utility model has the advantages and positive effects that,

the light solvent in the solvent tank is pumped by a solvent pump and is transmitted to a premixer according to a certain proportion, the heavy stock solution in the stock solution tank is pumped by a stock pump and is transmitted to the premixer according to a certain proportion for mixing, the light solvent in the solvent tank is pumped by a solvent feeding pump and is transmitted to an extraction tower according to a certain proportion, so that the heavy and partial light matters are forcedly mixed in advance through the premixer, the contact area of the heavy and partial light matters is increased in the premixer, the mass transfer rate is improved, after the two fully mixed liquids are transmitted to the extraction tower, the light matters with mass transfer are continuously and upwardly flowed into the extraction phase tank in the extraction tower for extraction, the heavy matters in the extraction tower are continuously and downwardly recombined, and the light matters entering from the lower end are mixed again when passing through the packing in the extraction tower, so that secondary mass transfer is completed, non-target matters are prevented from being entrained in the extract, and the extraction efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of an extraction apparatus according to the present utility model;

FIG. 2 is a schematic diagram of a premixer structure of an extraction apparatus according to the present utility model;

FIG. 3 is a schematic view of the back structure of a premixer of an extraction device according to the present utility model;

fig. 4 is a schematic structural diagram of a mixing mechanism of an extraction device provided by the utility model;

FIG. 5 is a schematic diagram of a quantitative mechanism of an extraction device according to the present utility model;

fig. 6 is a schematic diagram of a quantitative tray structure of an extraction device according to the present utility model.

Legend description:

1. a solvent tank; 2. A raw liquid tank;

3. a premixer; 31. A solvent injection tube; 32. A stock solution injection pipe;

33. a dosing mechanism; 331. a quantitative tank; 332. a connecting piece; 333. an electric push rod; 334. a dosing plate; 335. a liquid level sensor; 336. a liquid injection pipe;

34. a first electromagnetic valve;

35. a mixing mechanism; 351. a transmission shaft; 352. mixing fan blades; 353. a through hole;

36. a motor; 37. an infusion tube; 38. a second electromagnetic valve; 39. an observation port;

4. an extraction column; 5. extracting phase groove; 6. a raffinate phase tank; 7. a solvent pump; 8. a solvent feed pump; 9. raw liquid pump.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As shown in fig. 1, the present utility model provides a technical solution: an extraction device comprises a solvent tank 1 and a raw liquid tank 2, wherein the solvent tank 1 is respectively connected with a premixer 3 and an extraction tower 4 through pipelines, the pipelines of the solvent tank 1 and the premixer 3 are provided with a solvent pump 7, the internal liquid of the solvent tank 1 is pumped into the premixer 3 through the solvent pump 7, the pipelines of the solvent tank 1 and the extraction tower 4 are provided with a solvent feeding pump 8, the internal light solvent of the solvent tank 1 is pumped into the extraction tower 4 through the solvent feeding pump 8, the raw liquid tank 2 is connected with the premixer 3 through the pipelines, the pipelines of the raw liquid tank 2 and the premixer 3 are provided with a raw liquid pump 9, the internal heavy raw liquid of the raw liquid tank 2 is pumped into the premixer 3 through the raw liquid pump 9, the premixer 3 is connected with the extraction tower 4 through the pipelines, the bottoms of the solvent tank 1 and the raw liquid tank 2 and the outside of the extraction tower 4 are provided with heaters, the solvent tank 1, the raw liquid tank 2 and the extraction tower 4 are preheated and heated by the heaters, the extraction phase tank 5 is connected with the top end of the extraction tower 4 through a pipeline, the raffinate phase tank 6 is connected with the bottom end of the extraction tower 4 through a pipeline, the extraction tower 4 adopts a countercurrent extraction mode, heavy items flow out from the lower part of the extraction tower 4 through the raffinate phase tank 6 after passing through a plurality of theoretical stages of the extraction tower 4, light items flow out from the upper part of the extraction tower 4 through the extract phase tank 5 after passing through a plurality of fillers of the extraction tower 4, the heavy items and the light items are fully mixed and contacted when passing through gaps of a plurality of fillers in the extraction tower 4, mass transfer and separation are completed, each theoretical stage is divided into a mixing section and a clarifying section, and each stage of mixing sections and clarifying sections are alternately arranged;

the light solvent in the solvent tank 1 is pumped by the solvent pump 7 and is transferred into the premixer 3 according to a certain proportion, the heavy stock solution in the stock solution tank 2 is pumped by the stock pump 9 and is transferred into the premixer 3 according to a certain proportion for mixing, the light solvent in the solvent tank 1 is pumped by the solvent feeding pump 8 and is transferred into the extraction tower 4 according to a certain proportion, firstly, heavy and partial light are forcedly mixed in advance by the premixer 3, the contact area of the heavy and partial light is fully contacted in the premixer 3 so as to increase the mass transfer rate, after the two fully mixed liquids are transferred into the extraction tower 4, the light which has completed mass transfer continuously flows upwards into the extraction phase tank 5 in the extraction tower 4 for extraction, the heavy in the extraction tower 4 continuously flows downwards and is recombined downwards, and is mixed with the light which enters from the lower end again when passing through the filler in the extraction tower 4, secondary mass transfer is completed, non-target substances are prevented from being entrained in the extract, and the extraction efficiency is ensured to be improved.

Wherein the mixing ratio of the light item and the heavy item is (1-1.5): 1.

Wherein the material of the extraction tower 4 can be any one of metal, glass or polymer materials.

Example 2

The premixer 3 in the prior art of embodiment 1 of this embodiment may also be:

as shown in fig. 2-6, two sides of the pre-mixer 3 are respectively provided with a solvent injection pipe 31 and a stock solution injection pipe 32, the tops of the solvent injection pipe 31 and the stock solution injection pipe 32 are respectively provided with a quantifying mechanism 33, quantitative proportion distribution is carried out through the quantifying mechanism 33, and the solvent injection pipe 31 and the stock solution injection pipe 32 are injected into the pre-mixer 3 for mixing;

as shown in fig. 2 and 5, the quantifying mechanism 33 includes a quantifying tank 331 mounted on the top of the solvent injecting pipe 31 and the stock solution injecting pipe 32, a connecting piece 332 is fixed on the inner top of the quantifying tank 331, an electric push rod 333 is fixed at the center of the connecting piece 332, a quantifying plate 334 is movably mounted inside the quantifying tank 331, and an output end of the electric push rod 333 is connected with the top center of the quantifying plate 334, and the quantifying plate 334 is driven by the electric push rod 333 to adjust the position vertically inside the quantifying tank 331, so as to change the storage capacity inside the quantifying tank 331;

as shown in fig. 6, a liquid level sensor 335 is installed at the bottom of the dosing disc 334, a liquid injection pipe 336 is connected to the top edge of the dosing disc 334, a liquid is injected into the liquid injection pipe 336 connected to the dosing disc 334 inside the dosing tank 331 located at the top of the solvent injection pipe 31 and the liquid injection pipe 336 connected to the dosing disc 334 inside the dosing tank 331 located at the top of the stock solution injection pipe 32, when the electric push rod 333 drives the dosing disc 334 to adjust to the corresponding position inside the dosing tank 331, a liquid is injected into the liquid injection pipe 336 connected to the liquid injection pipe 334 inside the dosing tank 331 located at the top of the solvent injection pipe 31 and the liquid injection pipe 336 connected to the dosing disc 334 inside the dosing tank 331 located at the top of the stock solution injection pipe 32, after the liquid reaches the liquid level sensor 335, the liquid is sensed by the liquid level sensor, and is transferred to a control console, after the liquid injection pipe 335 is stopped between the liquid tank 1 and the liquid tank 3 and the stock solution tank 2, and the stock solution tank 3 are respectively, and after the liquid injection valve 34 is opened;

as shown in fig. 2, the solvent injection pipe 31 and the stock solution injection pipe 32 are respectively provided with a first electromagnetic valve 34, and the opening and closing of the solvent injection pipe 31 and the stock solution injection pipe 32 are controlled by the first electromagnetic valve 34, so that the injection of the solvent is realized;

as shown in fig. 2-4, a motor 36 is installed at the bottom of the pre-mixer 3, a mixing mechanism 35 is installed in the pre-mixer 3, the mixing mechanism 35 comprises a transmission shaft 351, a mixing fan blade 352 is fixed on the transmission shaft 351, a plurality of through holes 353 are formed in the mixing fan blade 352, the bottom end of the transmission shaft 351 penetrates through the bottom of the pre-mixer 3 and is connected with the output end of the motor 36, the transmission shaft 351 is driven to rotate by the motor 36, so that the mixing fan blade 352 can stir and mix liquid injected into the pre-mixer 3, and through the through holes 353 are formed in the mixing fan blade 352, so that when stirring and mixing are performed, the mixing efficiency of the two liquids is improved under the condition that the mixing of the two liquids is disturbed by the through holes 353;

as shown in fig. 3, a liquid transfer tube 37 is further installed at the bottom of the pre-mixer 3, a second electromagnetic valve 38 is installed on the liquid transfer tube 37, the liquid transfer tube 37 is connected with the extraction tower 4, and the opening and closing of the liquid transfer tube 37 are controlled by the second electromagnetic valve 38, so that the mixed liquid can be injected into the extraction tower 4 through the liquid transfer tube 37;

as shown in fig. 2 and 5, the pre-mixer 3, the solvent injection pipe 31 and the quantitative tank 331 at the top of the stock solution injection pipe 32 are provided with observation ports 39, and scale marks are arranged on the sides of the observation ports 39, so that the liquid solvents in the pre-mixer 3 and the quantitative tank 331 can be directly observed through the observation ports 39 and the scale marks.

The implementation is specifically as follows: the electric push rod 333 drives the quantitative tray 334 to adjust the position up and down in the quantitative tank 331 so as to change the storage capacity in the quantitative tank 331, after the electric push rod 333 drives the quantitative tray 334 to adjust to the corresponding position in the quantitative tank 331, the pipeline between the solvent tank 1 and the pre-mixer 3 and the pipeline between the raw liquid tank 2 and the pre-mixer 3 are respectively filled with liquid in the liquid injection pipe 336 communicated with the quantitative tray 334 in the quantitative tank 331 positioned at the top of the solvent injection pipe 31 and the liquid injection pipe 336 communicated with the quantitative tray 334 in the quantitative tank 331 positioned at the top of the raw liquid injection pipe 32, after the liquid reaches the position of the liquid level sensor 335, the liquid level sensor 335 senses the liquid position and transmits the liquid to the control total station, the pipeline between the solvent tank 1 and the pre-mixer 3 and the pipeline between the raw liquid tank 2 and the pre-mixer 3 stop filling, then the control total station opens the first electromagnetic valve 34, so that the liquid after the quantification is filled into the pre-mixer 3, the control total station starts the motor 36 to drive the transmission shaft 351 to rotate so that the liquid in the pre-mixer 3 can be stirred and mixed by the liquid in the injection pre-mixer 3, and the mixing fan blade 352 can be mixed by stirring the liquid in the pre-mixer 3, and the mixing tower can be mixed by the mixing tower 353, the mixing efficiency can be improved by the mixing efficiency of the mixing liquid can be completed by the mixing tower 3, and the liquid can be mixed by the mixing efficiency by the liquid through the mixing tower 3 and the mixing tower 3.

Compared with the premixer in the prior art, the light solvent and heavy stock solution with a certain proportion are manually configured, then are injected into the premixer for mixing, so that the manual and workload is increased, the electric push rod 333 drives the quantitative tray 334 to adjust the position vertically in the quantitative tank 331, thereby changing the storage capacity in the quantitative tank 331, then the light solvent and heavy stock solution are respectively injected into the quantitative tank 331 with a determined volume, diluted and mixed by the mixing mechanism 35, and finally are injected into the extraction tower 4 by the infusion tube 37, so that the increase of manual and workload caused by adopting manual configuration is greatly avoided.

Example 3

On the basis of the embodiment 1 and the embodiment 2, under the condition that the step temperature and the proportion in the method are the same, the effect comparison of using the premixer 3 and not using the premixer 3 is that:

working principle:

as shown in fig. 1-6:

1) The solvent tank 1 and the raw liquid tank 2 are preheated by a heater to raise the temperature;

2) After the temperature of the solvent tank 1 and the raw liquid tank 2 is stabilized:

pumping the liquid in the solvent tank 1 through a solvent pump 7 and injecting the liquid into the premixer 3;

the heavy stock solution in the stock solution tank 2 is pumped by the stock solution pump 9 and is injected into the premixer 3;

3) The heavy items and part of the light items are forcedly mixed in advance through a premixer 3;

4) The fully mixed materials are extracted from the top of the premixer 3 and enter the extraction tower 4;

5) Directly feeding solvent into the extraction tower, and adjusting the temperature of the extraction tower 4 through a heater;

pumping light solvent in the solvent tank 1 through a solvent feeding pump 8, and injecting the light solvent into the extraction tower 4;

6) The heavy items flow out from the lower part of the extraction tower 4 through a raffinate phase groove 6 after passing through a plurality of theoretical stages of the extraction tower 4, the light items flow out from the upper part of the extraction tower 4 through an extract phase groove 5 after passing through a plurality of fillers of the extraction tower 4, and the heavy items and the light items are fully mixed and contacted when passing through gaps of a plurality of fillers in the extraction tower 4, so that mass transfer and separation are completed;

preferably, the temperature of the solvent tank in the step 1) is controlled to be 60-75 ℃, and the temperature of the raw liquid tank is controlled to be 75-95 ℃.

Preferably, the solvent to stock feed ratio of step 2) is (1-1.5): 1.

Preferably, the ratio of the solvent to the stock solution in the extraction tower 4 in the step 5) is (1-1.5): 1, and the temperature of the extraction tower 4 is controlled to be 60-75 ℃.

The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.

Claims (6)

1. An extraction device is characterized by comprising a solvent tank and a raw liquid tank;

the solvent tank is respectively connected with a premixer and an extraction tower through pipelines;

the raw liquid tank is connected with the premixer through a pipeline;

the premixer is connected with the extraction tower through a pipeline;

and two ends of the extraction tower are respectively connected with an extraction phase tank and a raffinate phase tank through pipelines.

2. An extraction apparatus according to claim 1, wherein: and the pipelines of the solvent tank and the premixer are provided with a solvent pump for extracting liquid in the solvent tank.

3. An extraction apparatus according to claim 1, wherein: and the raw liquid tank and the pipeline of the premixer are provided with raw liquid pumps for pumping liquid in the raw liquid tank.

4. An extraction apparatus according to claim 1, wherein: and the solvent tank and the extraction tower are provided with a solvent feeding pump for extracting liquid in the solvent tank.

5. An extraction apparatus according to claim 1, wherein: the extraction phase groove is connected with the top end of the extraction tower through a pipeline, and the raffinate phase groove is connected with the bottom end of the extraction tower through a pipeline.

6. An extraction apparatus according to claim 1, wherein: the bottoms of the solvent tank and the raw liquid tank and the outside of the extraction tower are provided with heaters.