Ethanol dehydration device based on pervaporation membrane

Abstract

The utility model discloses an ethanol dehydration device based on a pervaporation membrane, which relates to the technical field of ethanol dehydration and comprises a bottom plate, a separation cylinder and a condensation cylinder are respectively arranged at the top end of the bottom plate, a bottom cover is arranged at the bottom end of the separation cylinder, and a pervaporation membrane body is arranged on the inner walls of the separation cylinder and the bottom cover. Evaporation assemblies are arranged at the top end of the bottom plate; the evaporation assembly comprises an evaporation cylinder, a rotating rod is rotatably installed at the bottom end of the inner wall of the evaporation cylinder, a set of stirring plates are fixedly installed on the outer wall of the rotating rod, a set of rotating blades are fixedly installed at the top end of the rotating rod, and as mixed liquid is heated, generated steam rises to drive the rotating blades at the top end of the rotating rod to rotate; therefore, the rotating blade rotates and drives the rotating rod to rotate at the same time, then the stirring plate stirs the ethanol mixed solution, the mixed solution is heated more uniformly, the problem of local uneven heating caused by a fixed heating source is avoided, and the vaporization efficiency of the mixed solution is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ethanol dehydration, specifically to an ethanol dehydration device based on a pervaporation membrane. BACKGROUND

[0002] In industrial production, ethanol is an important organic chemical product, widely used in pharmaceuticals, dyes, coatings, flavors, synthetic rubber, plastics and many other fields. At present, a large amount of water is produced in the production process of ethanol, which has a great influence on the purity and quality of ethanol, so dehydration treatment is needed. Pervaporation technology, as a new membrane separation technology, has attracted much attention in the past decade. It uses the driving force of the vapor pressure difference of the components on both sides of the membrane to make the mixture permeate through the membrane and partially evaporate, thereby achieving separation.

[0003] In the prior art, such as patent number CN218339445U, an alcohol pervaporation membrane liquid dehydration device, comprising a rectangular box, the inside of the rectangular box is inserted and installed with a rectangular frame, the rectangular frame separates the inside of the rectangular box into a raw material bin and a low pressure bin, the inside bottom end of the raw material bin is installed with heating wires for heating the inside of the raw material bin, the inside top end of the raw material bin is installed with temperature sensors for monitoring the inside of the raw material bin, the inside of the rectangular frame is embeddedly installed with a separation membrane, the outer edge surface of the rectangular frame is embedded in the inner wall of the rectangular box and is provided with a sealing plate, through the raw material bin, the feed pipe, the heating wires and the temperature sensors, alcohol is added into the raw material bin through the feed pipe, then the feed pipe is closed, then the alcohol is heated by the heating wires, and the dehydration of the alcohol is accelerated by the temperature sensors to improve the efficiency.

[0004] The above-mentioned patent can dehydrate and recover ethanol, but there are still some problems. During the heating process of the ethanol mixture, since the heating source is fixed, some of the mixture may not be uniformly heated, which affects the vaporization effect of the mixture. Therefore, the utility model provides an ethanol dehydration device based on a pervaporation membrane. UTILITY MODEL CONTENT

[0005] In view of the deficiencies of the prior art, the utility model provides an ethanol dehydration device based on a pervaporation membrane, which solves the problem that during the heating process of the ethanol mixture, since the heating source is fixed, some of the mixture may not be uniformly heated, which affects the vaporization effect of the mixture.

[0006] In order to achieve the above object, the utility model discloses a kind of ethanol dewatering devices based on pervaporation membrane, including bottom plate, the top of the bottom plate is separately provided with separation cylinder and condensing cylinder, the bottom of the separation cylinder is provided with bottom cover, the inner wall of the separation cylinder and bottom cover is provided with pervaporation membrane body, the top of the bottom plate is provided with evaporation assembly;

[0007] The evaporation assembly includes an evaporation cylinder, a rotating rod is rotatably mounted to the inner wall bottom end of the evaporation cylinder, a group of stirring plates are fixedly installed to the outer wall of the rotating rod, a group of rotating vanes are fixedly installed to the top end of the rotating rod, a second delivery pump is provided on one side of the outer wall of the evaporation cylinder, a reflux pipe is fixedly communicated to the input end of the second delivery pump, and the outer wall of one end of the reflux pipe is fixedly communicated with the condensing cylinder.

[0008] Preferably, the evaporation cylinder is provided with a heating device inside, for heating and vaporizing the ethanol mixture, a communication pipe is fixedly communicated to the top end of the evaporation cylinder, and the outer wall of one end of the communication pipe penetrates through the top end of the separation cylinder and is fixedly communicated with the pervaporation membrane body.

[0009] Preferably, the bottom end of the evaporation cylinder is fixedly communicated with a liquid inlet pipe, the outer wall of the liquid inlet pipe is provided with a liquid inlet valve, a group of supports are fixedly installed to the outer wall of the evaporation cylinder, a group of the supports are fixedly connected with the bottom plate, the output end of the second delivery pump is fixedly communicated with the evaporation cylinder, and the second delivery pump is fixedly installed to the top end of the bottom plate.

[0010] Preferably, the separation cylinder and the bottom cover are fixedly connected through a first flange plate, the outer wall of the separation cylinder is fixedly communicated with an air inlet pipe and an air outlet pipe respectively, and the air inlet pipe and the air outlet pipe are fixedly installed with pipe covers through second flange plates respectively.

[0011] Preferably, a first delivery pump is fixedly installed to the bottom end of the bottom plate, the input end of the first delivery pump penetrates through the inner wall of the bottom cover and is fixedly communicated with the pervaporation membrane body, and the output end of the first delivery pump is fixedly communicated with the condensing cylinder.

[0012] Preferably, a liquid outlet valve is provided on one side of the outer wall of the condensing cylinder, and support columns are fixedly installed to the bottom cover and the condensing cylinder, for supporting the bottom cover and the condensing cylinder.

[0013] Beneficial effects

[0014] The utility model provides a kind of ethanol dewatering devices based on pervaporation membrane.Compared with prior art, it has the following beneficial effects:

[0015] 1. The ethanol dehydration device based on the pervaporation membrane, the heating device in the evaporation cylinder starts to work to heat the ethanol mixture. As the mixed liquid is heated, the generated steam rises to drive the rotary blade at the top of the rotating rod to rotate. Since the rotary blade is fixedly connected with the rotating rod, and the bottom of the rotating rod is connected with the stirring plate, the rotary blade drives the rotating rod to rotate when it rotates, thereby making the stirring plate stir the ethanol mixture. The rising power of the steam is used to realize stirring, so that the mixed liquid is heated more uniformly, the problem of uneven local heating caused by the fixed heating source is avoided, the vaporization efficiency of the mixed liquid is improved, and sufficient vaporization of the mixed liquid is ensured.

[0016] 2. The ethanol dehydration device based on the pervaporation membrane, the ethanol condensed in the condensing cylinder can be discharged through the liquid outlet valve, at this time, the discharged ethanol can be detected, if the water content in the ethanol is too high, the liquid in the condensing cylinder can be retransported to the evaporation cylinder through the second conveying pump and the reflux pipe to participate in the evaporation and dehydration process again, thereby improving the quality of ethanol dehydration. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the utility model;

[0018] Figure 2 It is a whole structure schematic view of another angle of the utility model;

[0019] Figure 3 It is a cross section schematic view of the evaporation assembly of the utility model;

[0020] Figure 4 It is a cross section schematic view of the separation cylinder of the utility model.

[0021] In the drawing: 1, bottom plate; 2, evaporation assembly; 21, evaporation cylinder; 22, rotating rod; 23, stirring plate; 24, rotary blade; 25, liquid inlet pipe; 26, support; 27, liquid inlet valve; 28, communication pipe; 3, separation cylinder; 4, condensing cylinder; 5, pervaporation membrane body; 6, bottom cover; 8, first conveying pump; 9, air inlet pipe; 10, air outlet pipe; 11, reflux pipe; 12, second conveying pump; 13, liquid outlet valve. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0023] The utility model provides two technical schemes:

[0024] Figures 1-4 The first embodiment is shown: a kind of ethanol dehydration device based on pervaporation membrane, including bottom plate 1, the top of bottom plate 1 is provided with separation cylinder 3 and condensing cylinder 4 respectively, the bottom of separation cylinder 3 is provided with bottom cover 6, the inner wall of separation cylinder 3 and bottom cover 6 is provided with the body of pervaporation membrane 5, the body of pervaporation membrane 5 is prior art, due to the hydrophobicity of membrane, only water vapor can pass through membrane hole, and ethanol vapor cannot pass through membrane hole, so the separation of water vapor and ethanol vapor can be completed, the top of bottom plate 1 is provided with evaporation assembly 2;

[0025] Evaporation assembly 2 includes evaporation cylinder 21, the inner wall bottom of evaporation cylinder 21 is rotatably installed with rotating rod 22, a group of stirring plates 23 are fixedly installed on the outer wall of rotating rod 22, a group of rotating vanes 24 are fixedly installed on the top of rotating rod 22, steam rises and drives rotating vanes 24 to rotate, the outer wall of evaporation cylinder 21 is provided with second conveying pump 12 on one side, the input end of second conveying pump 12 is fixedly communicated with return pipe 11, one end of the outer wall of return pipe 11 is fixedly communicated with condensing cylinder 4, ethanol in condensing cylinder 4 can return to evaporation cylinder 21 through return pipe 11 and second conveying pump 12.

[0026] The inside of evaporation cylinder 21 is provided with heating device, for heating ethanol mixture to evaporate and vaporize, the top of evaporation cylinder 21 is fixedly communicated with connecting pipe 28, one end of the outer wall of connecting pipe 28 penetrates the top of separation cylinder 3, and is fixedly communicated with the body of pervaporation membrane 5, the steam generated in evaporation cylinder 21 will enter the body of pervaporation membrane 5 through connecting pipe 28.

[0027] The bottom of evaporation cylinder 21 is fixedly communicated with liquid inlet pipe 25, the outer wall of liquid inlet pipe 25 is provided with liquid inlet valve 27, a group of supports 26 are fixedly installed on the outer wall of evaporation cylinder 21, a group of supports 26 are all fixedly connected with bottom plate 1, the output end of second conveying pump 12 is fixedly communicated with evaporation cylinder 21, and second conveying pump 12 is fixedly installed on the top of bottom plate 1.

[0028] Figures 1-4 The second embodiment is shown, and the main difference from the first embodiment is that separation cylinder 3 and bottom cover 6 are fixedly connected by first flange plate, the outer wall of separation cylinder 3 is fixedly communicated with air inlet pipe 9 and air outlet pipe 10 respectively, air inlet pipe 9 and air outlet pipe 10 are fixedly installed with pipe cover through second flange plate respectively, air inlet pipe 9 and air outlet pipe 10 can be closed by second flange plate and pipe cover when not in use, to prevent dust and the like from entering separation cylinder 3, separation cylinder 3 and bottom cover 6 are connected by first flange plate, air inlet pipe 9 and air outlet pipe 10 are connected with pipe cover by second flange plate, which is convenient for installation, disassembly and maintenance.

[0029] The bottom end of the bottom plate 1 is fixedly provided with a first conveying pump 8, the input end of the first conveying pump 8 penetrates the inner wall of the bottom cover 6 and is fixedly communicated with the pervaporation membrane body 5, the output end of the first conveying pump 8 is fixedly communicated with the condensing cylinder 4, the ethanol steam in the pervaporation membrane body 5 can enter into the condensing cylinder 4 through the first conveying pump 8, and the condensing device is arranged in the condensing cylinder 4 and can condense the ethanol steam into ethanol liquid.

[0030] The outer wall of the condensing cylinder 4 is provided with a liquid outlet valve 13, and the bottom cover 6 and the condensing cylinder 4 are both fixedly provided with support columns for supporting the bottom cover 6 and the condensing cylinder 4.

[0031] Meanwhile, the contents not described in detail in the specification all belong to the prior art known by those skilled in the art.

[0032] In work, the ethanol mixture enters into the evaporation cylinder 21 through the liquid inlet pipe 25 under the control of the liquid inlet valve 27, and the heating device in the evaporation cylinder 21 starts to work to heat the ethanol mixture. As the mixture is heated, the generated steam rises to drive the rotary blade 24 at the top end of the rotating rod 22 to rotate. Since the rotary blade 24 is fixedly connected with the rotating rod 22 and the bottom of the rotating rod 22 is connected with the stirring plate 23, the rotary blade 24 drives the rotating rod 22 to rotate when the rotary blade 24 rotates, and then the stirring plate 23 stirs the ethanol mixture. The rising power of the steam is used to realize the stirring, so that the mixture is heated more uniformly, the problem of uneven local heating caused by the fixed heating source is avoided, the mixture is fully vaporized, the ethanol steam is generated and then enters into the pervaporation membrane body 5 in the separation cylinder 3 through the communication pipe 28, then the high-temperature gas is introduced into the separation cylinder 3 through the gas inlet pipe 9, on the one hand, the temperature in the system is increased to prevent the water vapor from being condensed in the separation process and maintain its gaseous state; on the other hand, the flow of the high-temperature gas produces a sweeping effect, the water vapor passes through the pervaporation membrane body 5 and then is discharged from the separation cylinder 3 through the gas outlet pipe 10, and the ethanol steam is conveyed to the condensing cylinder 4 under the action of the first conveying pump 8 to condense the ethanol steam into liquid, and the condensed ethanol in the condensing cylinder 4 can be discharged through the liquid outlet valve 13. At this time, the discharged ethanol can be detected, if the water content in the ethanol is too high, the liquid in the condensing cylinder 4 can be conveyed back to the evaporation cylinder 21 through the second conveying pump 12 and the reflux pipe 11 to participate in the evaporation and dehydration process again, so as to improve the quality of ethanol dehydration.

[0033] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0034] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. An ethanol dehydration device based on a pervaporation membrane, comprising a base plate (1), the top end of the base plate (1) is respectively provided with a separation cylinder (3) and a condensation cylinder (4), the bottom end of the separation cylinder (3) is provided with a bottom cover (6), the inner wall of the separation cylinder (3) and the bottom cover (6) is provided with a pervaporation membrane body (5), characterized in that: The top end of the bottom plate (1) is provided with an evaporation assembly (2); The evaporation assembly (2) comprises an evaporation cylinder (21), the inner wall bottom end of the evaporation cylinder (21) is rotatably provided with a rotating rod (22), the outer wall of the rotating rod (22) is fixedly provided with a group of stirring plates (23), the top end of the rotating rod (22) is fixedly provided with a group of rotating blades (24), one side of the outer wall of the evaporation cylinder (21) is provided with a second conveying pump (12), the input end of the second conveying pump (12) is fixedly communicated with a return pipe (11), one end of the outer wall of the return pipe (11) is fixedly communicated with a condensation cylinder (4).

2. The ethanol dehydration device based on the pervaporation membrane according to claim 1, characterized in that: The inside of the evaporation cylinder (21) is provided with a heating device for heating the ethanol mixture to evaporate and vaporize, the top end of the evaporation cylinder (21) is fixedly communicated with a communication pipe (28), one end of the outer wall of the communication pipe (28) penetrates through the top end of a separation cylinder (3) and is fixedly communicated with a permeation vaporization membrane body (5).

3. The ethanol dehydration device based on the pervaporation membrane according to claim 1, characterized in that: The bottom end of the evaporation cylinder (21) is fixedly communicated with a liquid inlet pipe (25), the outer wall of the liquid inlet pipe (25) is provided with a liquid inlet valve (27), the outer wall of the evaporation cylinder (21) is fixedly provided with a group of supports (26), a group of the supports (26) are fixedly connected with the bottom plate (1), the output end of the second conveying pump (12) is fixedly communicated with the evaporation cylinder (21), and the second conveying pump (12) is fixedly installed at the top end of the bottom plate (1).

4. The ethanol dehydration device based on the pervaporation membrane according to claim 1, characterized in that: The separation cylinder (3) and the bottom cover (6) are fixedly connected through a first flange plate, the outer wall of the separation cylinder (3) is respectively fixedly communicated with an air inlet pipe (9) and an air outlet pipe (10), and the air inlet pipe (9) and the air outlet pipe (10) are respectively fixedly provided with pipe covers through second flange plates.

5. The ethanol dehydration device based on the pervaporation membrane according to claim 1, characterized in that: The bottom end of the bottom plate (1) is fixedly provided with a first conveying pump (8), the input end of the first conveying pump (8) penetrates through the inner wall of the bottom cover (6) and is fixedly communicated with the permeation vaporization membrane body (5), and the output end of the first conveying pump (8) is fixedly communicated with the condensation cylinder (4).

6. The ethanol dehydration device based on the pervaporation membrane according to claim 1, characterized in that: One side of the outer wall of the condensation cylinder (4) is provided with a liquid outlet valve (13), and the bottom cover (6) and the condensation cylinder (4) are both fixedly provided with support columns for supporting the bottom cover (6) and the condensation cylinder (4).

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