A process equipment for efficient separation and purification of bio-based ethylene glycol

Abstract

The utility model relates to the field of ethylene glycol separation and purification, and discloses a process equipment for efficient separation and purification of bio-based ethylene glycol, comprising a support table and a fermentation cylinder arranged on the support table, one side of the fermentation cylinder is connected to a basic filtering component, one side of the basic filtering component is connected to a distillation component, a condensation component is arranged above the distillation component, and one side of the distillation component is arranged with an extraction component; the novel U-shaped heating rod heats a solution, and uses a temperature sensor to feed back the temperature of the solution in real time, evaporates impurities with low boiling points, and condenses and purifies them by using a condensation plate; the novel device uses the effect of ethylene glycol in a benzene extractant to form layers, separates ethylene glycol from a small amount of unpurified impurities and places them in an upper layer, passes a mixed solution of ethylene glycol and benzene in the upper layer into a benzene removal tank, removes the benzene solution by filtering with filter paper, and finally obtains pure ethylene glycol which is collected in an ethylene glycol collection barrel, the novel device greatly improves the purification accuracy of ethylene glycol, and has high product quality.

Description

Technical Field

[0001] The utility model relates to the field of separation and purification of ethylene glycol, in particular to a process equipment for efficient separation and purification of bio-based ethylene glycol. Background Art

[0002] With the development of the global economy, the demand for oil is growing, while oil resources are decreasing, the contradiction between oil supply and demand is increasing, and the war for oil is intensifying. The world is working hard to study and explore the use of the inexhaustible biological resources on the earth. Using renewable biomass resources, developing bio-based chemical industry, and replacing petrochemical products is the only way to solve the resource and energy crisis and an important way to achieve sustainable development. Therefore, developing raw materials that can reduce or replace oil is a very important research direction. Ethylene glycol is an important raw material for synthesizing PET. At present, the industry mostly uses ethylene oxide direct hydration method or ethylene synthesis method to produce it. This production method has high production cost, consumes a lot of raw materials and energy, and generates a lot of by-products. my country is a big agricultural country with rich biological resources. The macromolecular polysaccharides in renewable resources such as crop straw, husks, corn cobs and other plant residues are converted into fermentable sugars, fermentable organic acids and biopolyols by chemical degradation or biodegradation. The biomass polymer materials synthesized entirely with these fermentation products as raw material monomers can save more oil resources to the maximum extent and promote the development of circular economy. The bio-based ethylene glycol mixed solution produced by fermentation needs to be purified to obtain ethylene glycol. The existing ethylene glycol purification equipment does not have sufficient purification purity, and the impurity content is too high, which affects the purification quality.

[0003] Therefore, a highly efficient separation and purification process equipment for bio-based ethylene glycol is needed to solve this problem. Summary of the invention

[0004] The purpose of the utility model is to provide a process equipment for efficient separation and purification of bio-based ethylene glycol, aiming to solve the problems raised in the background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A process equipment for efficient separation and purification of bio-based ethylene glycol, comprising a support table and a fermentation cylinder arranged on the support table, one side of the fermentation cylinder is connected to a basic filtering component, one side of the basic filtering component is connected to a distillation component, one end of the discharge pipe is embedded with a macromolecular filter, the outer side surfaces at both ends of the macromolecular filter are provided with threads, and filter screens are provided at the ports at both ends of the macromolecular filter. The distillation component is provided with a distillation cylinder, a heater is provided on one side of the distillation cylinder, a temperature sensor is installed on the heater, a U-shaped heating rod is provided above the temperature sensor, a condensation component is provided above the distillation component, the condensation component includes a condenser, the condenser is connected to a condensation plate, a liquid receiving tank is provided below the condensation plate, a leakage pipe is installed on the liquid receiving tank, a water bucket is provided below the leakage pipe, and an extraction component is provided on one side of the distillation component.

[0007] Preferably, a discharge pipe is provided on one side of the fermentation cylinder, a manual valve pipe is provided above the discharge pipe, the manual valve pipe is engaged with a manual valve, and the manual valve is provided with a closing piston.

[0008] Preferably, one side of the distillation cylinder is connected to the extraction cylinder, an extractant adding tube is provided on the top of the extraction cylinder, one side of the extraction cylinder is connected to a benzene removal tank, and the benzene removal tank 442 is embedded with a benzene removal plate.

[0009] Preferably, the benzene removal plate is provided with a test paper slot, a leakage hole is provided above the test paper slot, filter paper is provided on the leakage hole, and an ethylene glycol collection bucket is provided below the benzene removal slot.

[0010] Beneficial effects: The new type of impurities are retained in the macromolecular filter through the filtering effect of the filter net, thereby removing the macromolecular impurities of the ethylene glycol mixed solution; the new U-shaped heating rod heats the solution and uses the temperature sensor to feedback the temperature of the solution in real time, and controls the solution temperature at 150 degrees. Since the boiling point of ethylene glycol is 197 degrees, and the boiling points of other impurities such as ethanol, methanol, acetaldehyde, and lactic acid are all below 130 degrees, after a period of distillation, the impurities will boil and become steam, rising to meet the condensation plate above, and the condenser makes the condensation plate The temperature is very low, and the steam condenses into water when it is cold and falls onto the liquid receiving tank, and then enters the water bucket through the leakage pipe to end the first purification of ethylene glycol. This new type uses the effect of ethylene glycol in the benzene extractant to form layers, separates ethylene glycol from a small amount of unpurified impurities and places them on the upper layer, and passes the mixed solution of ethylene glycol and benzene in the upper layer into the benzene removal tank. The benzene solution is removed by filtering with filter paper on the benzene removal plate, and finally pure ethylene glycol is obtained and collected in the ethylene glycol collection bucket. This new type of secondary separation and purification by distillation and extraction method greatly improves the purification purity of ethylene glycol, and the product quality is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a structural diagram of the fermentation cylinder of the utility model;

[0014] Figure 3 This is a schematic diagram of the basic filter assembly structure of the utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the distillation cylinder of the utility model;

[0016] Figure 5 This is a schematic diagram of the structure of the condensation component and the distillation component of the utility model;

[0017] Figure 6 This is a schematic diagram of the structure of the extraction component of the utility model.

[0018] Legend:

[0019] 1. Support table; 2. Fermentation cylinder; 3. Basic filtration assembly; 4. Distillation assembly; 5. Condensation assembly; 6. Extraction assembly; 21. Discharge pipe; 22. Manual valve pipe; 23. Manual valve; 24. Closing piston; 221. Macromolecular filter; 231. Thread; 241. Filter screen; 41. Distillation cylinder; 42. Heater; 43. Temperature sensor; 44. U-shaped heating rod; 51. Condenser; 52. Condensation plate; 53. Liquid collecting tank; 54. Leakage tube; 55. Bucket; 421. Extraction cylinder; 431. Extractant addition tube; 442. Benzene removal tank; 45. Benzene removal board; 451. Test paper tank; 452. Leakage hole; 453. Filter paper; 441. Ethylene glycol collection barrel. DETAILED DESCRIPTION

[0020] The utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] It should be noted that if the utility model embodiments involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, "multiple" means more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can use it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0023] Please refer to the instruction manual Figure 1-Figure 4 A process equipment for efficient separation and purification of bio-based ethylene glycol includes a support table 1 and a fermentation cylinder 2 arranged on the support table 1, one side of the fermentation cylinder 2 is connected to a basic filtering component 3, one side of the basic filtering component 3 is connected to a distillation component 4, a condensation component 5 is arranged above the distillation component 4, and one side of the distillation component 4 is provided with an extraction component 6.

[0024] Furthermore, a discharge pipe 21 is provided on one side of the fermentation cylinder 2, a manual valve pipe 22 is provided above the discharge pipe 21, a manual valve 23 is engaged with the manual valve pipe 22, and the manual valve 23 is provided with a closing piston 24.

[0025] Furthermore, a macromolecular filter 221 is embedded in one end of the discharge pipe 21, and threads 231 are provided on the outer sides of both ends of the macromolecular filter 221. Filter screens 241 are provided at the ports at both ends of the macromolecular filter 221. Crops can be fermented in the fermentation cylinder 2 to obtain an ethylene glycol mixed solution. The manual valve 23 is adjusted to rotate in the manual valve tube 22 to open the closing piston 24. The filtering effect of the filter screen 241 allows impurities to remain in the macromolecular filter 221. After filtering for a period of time, the macromolecular filter 221 can be removed for cleaning by rotating it.

[0026] Furthermore, the distillation component 4 is provided with a distillation cylinder 41, a heater 42 is provided on one side of the distillation cylinder 41, a temperature sensor 43 is installed on the heater 42, a U-shaped heating rod 44 is provided above the temperature sensor 43, the heater 42 is started, the solution is heated by the U-shaped heating rod, and the temperature sensor 43 is used to feed back the temperature of the solution in real time, and the temperature of the solution is controlled at 150 degrees. Because the boiling point of ethylene glycol is 197 degrees, and the boiling points of other impurities such as ethanol, methanol, acetaldehyde, and lactic acid are all below 130 degrees, after a period of distillation, the impurities will boil into steam and rise to meet the condensation plate 52 above.

[0027] Furthermore, the condensation component 5 includes a condenser 51, and the condenser 51 is connected to a condensation plate 52. A liquid receiving tank 53 is provided below the condensation plate 52, and a leakage pipe 54 is installed on the liquid receiving tank 53. A water bucket 55 is provided below the leakage pipe 54. The condenser 51 makes the temperature of the condensation plate 52 very low, and the steam condenses into water when it is cold and falls on the liquid receiving tank 53, and enters the water bucket 55 through the leakage pipe 54 to end the first separation and purification of ethylene glycol.

[0028] Furthermore, one side of the distillation cylinder 41 is connected to the extraction cylinder 421, and an extractant adding tube 431 is provided on the top of the extraction cylinder 421. One side of the extraction cylinder 421 is connected to a benzene removal tank 442, and the benzene removal tank 442 is embedded with a benzene removal plate 45. A small amount of benzene solution can be added to the extraction cylinder 421, and ethylene glycol forms layers under the action of the extractant, and ethylene glycol is separated from a small amount of unpurified impurities and placed in the upper layer. The mixed solution of ethylene glycol and benzene in the upper layer is passed into the benzene removal tank 442, and the benzene solution is removed by filtration through the filter paper 453 on the benzene removal plate 45 to finally obtain pure ethylene glycol and collect it in the ethylene glycol collection barrel 441.

[0029] Furthermore, the benzene removal plate 45 is provided with a test paper slot 451 , a leakage hole 452 is provided above the test paper slot 451 , a filter paper 453 is provided on the leakage hole 452 , and an ethylene glycol collection bucket 441 is provided below the benzene removal slot 442 .

[0030] First, the crops are fermented in the fermentation cylinder 2 to obtain an ethylene glycol mixed solution, which contains a large amount of macromolecular impurities. The manual valve 23 is adjusted to rotate in the manual valve tube 22 to open the closed piston 24, and the mixed solution enters the macromolecular filter 221 from the discharge pipe 21. The impurities are retained in the macromolecular filter 221 by the filtering effect of the filter mesh 241. After filtering for a period of time, the macromolecular filter 221 can be removed and cleaned by rotating it. The filtered solution enters the distillation cylinder 41, and the heater 42 is started. The solution is heated by the U-shaped heating rod, and the temperature sensor 43 is used to feed back the temperature of the solution in real time to control the temperature of the solution at 150 degrees. Because the boiling point of ethylene glycol is 197 degrees, and the boiling points of other impurities such as ethanol, methanol, acetaldehyde, and lactic acid are all below 130 degrees. After a period of distillation, The impurities will boil and become steam, which will rise and meet the condensation plate 52 above. The condenser 51 makes the temperature of the condensation plate 52 very low. The steam will condense into water when it is cold and fall onto the liquid receiving tank 53, and then enter the water bucket 55 through the leakage pipe 54 to end the first separation and purification of ethylene glycol. The separated and purified ethylene glycol flows into the extraction cylinder 421, and a small amount of benzene solution is added to the extraction cylinder 421 through the extractant addition pipe 431. Ethylene glycol forms layers under the action of the extractant, and ethylene glycol and a small amount of unpurified impurities are separated and placed in the upper layer. The mixed solution of ethylene glycol and benzene in the upper layer is passed into the benzene removal tank 442, and the benzene solution is removed by filtering through the filter paper 453 on the benzene removal plate 45 to finally obtain pure ethylene glycol and collect it in the ethylene glycol collection barrel 441. This new type of secondary separation and purification by distillation and extraction method greatly improves the purification purity of ethylene glycol, and the product quality is high.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A process equipment for efficient separation and purification of bio-based ethylene glycol, comprising a support table (1) and a fermentation cylinder (2) arranged on the support table (1), characterized in that: One side of the fermentation cylinder (2) is connected to a basic filter assembly (3), one side of the basic filter assembly (3) is connected to a distillation assembly (4), one end of the discharge pipe (21) is fitted with a macromolecular filter (221), both ends of the macromolecular filter (221) are provided with threads (231) on the outer side surfaces, both ends of the macromolecular filter (221) are provided with filter screens (241) at the ports at both ends, the distillation assembly (44) is provided with a distillation cylinder (41), one side of the distillation cylinder (41) is provided with a heater (42), and the heater (42) is provided with a A temperature sensor (43), a U-shaped heating rod (44) is provided above the temperature sensor (43), a condensation component (5) is provided above the distillation component (4), the condensation component (5) comprises a condenser (51), the condenser (51) is connected to a condensation plate (52), a liquid receiving tank (53) is provided below the condensation plate (52), a liquid leakage pipe (54) is installed on the liquid receiving tank (53), a water bucket (55) is provided below the liquid leakage pipe (54), and an extraction component (6) is provided on one side of the distillation component (4).

2. The process equipment for efficient separation and purification of bio-based ethylene glycol according to claim 1, characterized in that: A discharge pipe (21) is provided on one side of the fermentation cylinder (2), a manual valve pipe (22) is provided above the discharge pipe (21), the manual valve pipe (22) is engaged with a manual valve (23), and the manual valve (23) is provided with a closing piston (24).

3. The process equipment for efficient separation and purification of bio-based ethylene glycol according to claim 1, characterized in that: One side of the distillation cylinder (41) is connected to the extraction cylinder (421), and an extractant addition tube (431) is provided on the top of the extraction cylinder (421). One side of the extraction cylinder (421) is connected to a benzene removal tank (442), and a benzene removal plate (45) is embedded in the benzene removal tank (442).

4. The process equipment for efficient separation and purification of bio-based ethylene glycol according to claim 3, characterized in that: The benzene removal plate (45) is provided with a test paper slot (451), a liquid leakage hole (452) is provided above the test paper slot (451), a filter paper (453) is provided on the liquid leakage hole (452), and an ethylene glycol collection bucket (441) is provided below the benzene removal slot (442).

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