A distillation tower for ethanol purification

Abstract

The invention relates to a distillation tower for ethanol purification applied in the field of distillation technology. Through the coordinated arrangement of an orifice adjusting component and a pressure sensor, when liquid leaks, the obvious reduction of gas phase velocity and load will be sensed and monitored by the pressure sensor, based on which it can be judged whether liquid leakage occurs. Compared with the prior art, the liquid leakage phenomenon can be detected before obvious temperature and pressure abnormalities occur, which is convenient for staff to handle in time, effectively reducing the impact on ethanol distillation efficiency, and effectively avoiding the temperature and pressure out of control. In addition, after the leakage occurs, the orifice adjusting component can timely reduce the passable range of the upper opening of the through hole, so that when the gas passes through the place, the supporting force of the liquid is enhanced to a certain extent, thereby effectively alleviating the leakage situation, and effectively slowing down the temperature and pressure change amplitude before the staff starts maintenance, further reducing safety hazards.

Description

Technical Field

[0001] The invention relates to a distillation tower for ethanol purification, in particular to a distillation tower for ethanol purification applied in the field of distillation technology. Background Art

[0002] A distillation tower is a tower-type gas-liquid contact device for distillation. By utilizing the different volatilities of the components in the mixture, that is, the different vapor pressures of the components at the same temperature, the light components (low-boiling substances) in the liquid phase are transferred to the gas phase, while the heavy components (high-boiling substances) in the gas phase are transferred to the liquid phase, thereby achieving the purpose of separation.

[0003] When ethanol is distilled and purified, liquid leakage often occurs. The reason for this is that the gas phase load is too small, the pressure drop on the tray is insufficient, the gas velocity is too low, and the liquid on the tray cannot be lifted, causing the liquid to leak down along the tray holes. When liquid leakage occurs, the liquid phase cannot flow evenly through the tray, and according to the normal process, it flows along the downcomer through the liquid tray (trough) into the lower tray. After the leakage, the gas and liquid phases cannot contact well, and the heat and mass transfer effects are poor, which seriously affects the separation efficiency and easily causes the temperature and pressure in the tower to be out of control, posing a major safety hazard.

[0004] However, since the tower plate is located inside the equipment shell, it is difficult to detect leakage caused by insufficient gas flow rate in time. When it occurs, it has already had a great impact on the distillation process, the temperature and pressure inside the tower, which is not conducive to the efficient distillation of ethanol and has great hidden dangers. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that it is difficult to detect the leakage in time in the prior art, and when it is detected, the temperature, pressure and distillation efficiency have often been affected.

[0006] In order to solve the above problems, the present invention provides a distillation tower for ethanol purification, comprising a tower body with a control center and an alarm, a condenser, a reflux device and a reboiler, wherein the reboiler is close to the lower end of the tower body, and the inlet and outlet of the reboiler are both connected to the tower body through a pipeline, the condenser and the reflux device are both close to the upper end of the tower body, the tower body and the condenser, the condenser and the reflux device, and the reflux device and the tower body are all connected through a hose circulation, and a feed port is fixedly connected to the middle of the tower body, and the feed port is connected to the inside of the tower body;

[0007] A plurality of tower plates which are staggered and fixedly connected inside the tower body are included, and the tower plates include a plate body, a sinking plate fixedly connected to one end of the plate body, and a curved tube fixedly connected to the other end of the plate body. The sinking plate is lower than the plate body, and both upper and lower ends of the curved tube extend beyond the plate body. A plurality of through holes distributed in a rectangular array are drilled on the plate body, and a hole adjustment component is installed on the plate body. Two upper slide rails are installed on the upper end of the plate body. The hole adjustment component includes a plurality of variable hole strips which are connected to the upper slide rails and a hole pushing strip located below the plate body, and the plurality of variable hole strips are evenly distributed. Two pressure sensors are fixedly inlaid on the lower end of the plate body, and the pressure sensors are connected to the control center signal.

[0008] In the above-mentioned distillation tower for ethanol purification, by coordinating the hole adjustment component and the pressure sensor, on the one hand, the change of the gas phase flow rate can be monitored in time. Compared with the existing technology, it can be judged whether leakage occurs in time based on this, and after leakage occurs, the aperture of the tower plate can be adjusted to alleviate the leakage, effectively reduce the impact of temperature and pressure, and greatly reduce safety hazards.

[0009] The curved tube of one tower plate is opposite to the sinking plate of the adjacent tower plate, and the two adjacent tower plates do not contact each other. The plate body, the sinking plate and the curved tube form a complete circle in the top view section.

[0010] As a further improvement of the present application, there are multiple push hole strips, and multiple connecting rods are fixedly connected between two adjacent push hole strips. Two electric slide rails are installed at the lower end of the plate body. The multiple push hole strips are slidably connected to the electric slide rails. The multiple variable hole strips correspond to the multiple push hole strips respectively, and the multiple variable hole strips and the push hole strips are respectively located between two adjacent rows of through holes. There is magnetic attraction between the variable hole strips and the push hole strips.

[0011] As a further improvement of the present application, the two push-hole strips located in the middle part each include two forming strips corresponding to the two electric slide rails respectively and a gas measuring strip fixedly connected between the two forming strips. The gas measuring strip is an arc-shaped elastic structure, and in a natural state, the gas measuring strip does not contact the plate body. The two pressure sensors correspond to the middle parts of the two gas measuring strips respectively.

[0012] As a further improvement of the present application, the length and width of the variable hole strip and the push hole strip are the same, and the width of both is smaller than the distance between two adjacent through holes, the edge of the variable hole strip is flush with the edges of multiple through holes in an adjacent row, and the push hole strip is flush with the edges of multiple through holes in another adjacent row.

[0013] As a further improvement of the present application, the ends of the relative variable hole strips and the push hole strips that are far away from each other are staggered, the ends that are close to each other overlap in a top view, and the width of the overlapping part is not less than half the width of the variable hole strip.

[0014] As another improvement of the present application, two push hole strips are provided, and both push hole strips are fixedly connected to the bottom of the plate body, the middle parts of the two push hole strips correspond to the two pressure sensors respectively, the variable hole strip is located between two adjacent rows of through holes, and the variable hole strip is provided with a plurality of reduced diameter holes corresponding to the plurality of through holes respectively, and the inner diameter of the through hole is 2-3 times the inner diameter of the reduced diameter hole.

[0015] As another improvement supplement of the present application, two inverted convex half holes are drilled under the variable hole strip, and floating blocks are provided in the two inverted convex half holes. Multiple electric sliders are installed in the upper slide rail, and the electric sliders are electrically connected to electromagnetic plates. The multiple electromagnetic plates correspond to the multiple variable hole strips respectively, and the electromagnetic plates are connected to the control center signal.

[0016] As another improved supplement of the present application, the floating block includes an I-shaped floating block and two elastic telescopic rods fixedly connected between the bottom of the inverted convex half hole and the I-shaped floating block. The lower end of the I-shaped floating block extends into the upper slide rail, and the upper slide rail is a positive convex shape.

[0017] As another improvement and supplement of the present application, after the electromagnetic sheet is energized, a magnetic attraction force is generated on the I-shaped floating block.

[0018] In summary, through the coordinated setting of the hole-adjusting component and the pressure sensor, when leakage occurs, the obvious reduction in gas phase velocity and load will be sensed and monitored by the pressure sensor, based on which it can be determined whether leakage occurs. Compared with the prior art, the leakage can be detected before obvious temperature and pressure abnormalities occur, which is convenient for the staff to deal with in time, effectively reducing the impact on the ethanol distillation efficiency, and effectively avoiding the occurrence of temperature and pressure out of control; in addition, after the leakage occurs, the hole-adjusting component can promptly reduce the passable range of the upper opening of the through hole, so that when the gas passes through this place, the supporting force of the liquid is enhanced to a certain extent, thereby effectively alleviating the leakage, and effectively slowing down the amplitude of temperature and pressure changes before the staff starts maintenance, further reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the first implementation method of this application;

[0020] Figure 2 A cross-sectional view of a tower body portion of the first embodiment of the present application;

[0021] Figure 3 This is a schematic diagram of the flow paths of the gas phase and the liquid phase in the tower body in the first embodiment of the present application;

[0022] Figure 4 This is a three-dimensional view of a tower plate from a top view according to the first embodiment of the present application;

[0023] Figure 5This is a three-dimensional diagram of a tower plate in the first embodiment of the present application when viewed from above;

[0024] Figure 6 A top view of a tower plate according to a first embodiment of the present application;

[0025] Figure 7 This is a schematic diagram of the principle of the pressure sensor monitoring the gas velocity in the first embodiment of the present application;

[0026] Figure 8 This is a comparison diagram of the through hole diameters on the tower plate before and after being reduced in the first embodiment of the present application;

[0027] Fig. 9 This is a three-dimensional view of a tower plate from a top view according to a second embodiment of the present application;

[0028] Fig.10 This is a bottom-up perspective view of a tower plate according to a second embodiment of the present application;

[0029] Fig.11 This is a front cross-sectional view of a tower plate according to a second embodiment of the present application;

[0030] Fig.12 for Fig.11 Schematic diagram at A in the middle;

[0031] Fig.13 This is a schematic diagram of the variable hole strip at point A in 11 when it moves in the second embodiment of the present application.

[0032] Description of the numbers in the figure:

[0033] 1 tower body, 101 feed inlet, 21 condenser, 22 reboiler, 3 reflux, 4 tower plates, 41 plate body, 42 sinking plate, 43 arc tube, 401 through hole, 51 variable hole strip, 52 push hole strip, 501 connecting rod, 502 electric slide rail, 503 upper slide rail, 521 shaping strip, 522 gas measuring strip, 6 pressure sensor, 402 reduced diameter hole, 71 I-shaped floating block, 72 electromagnetic sheet, 73 elastic telescopic rod. DETAILED DESCRIPTION

[0034] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0035] The first implementation method:

[0036] Figure 1 and Figure 2A distillation tower for ethanol purification is shown, including a tower body 1 with a control center and an alarm, a condenser 21, a reflux device 3 and a reboiler 22, the reboiler 22 is close to the lower end of the tower body 1, and the inlet and outlet of the reboiler 22 are both connected to the tower body 1 through a pipeline, the condenser 21 and the reflux device 3 are both close to the upper end of the tower body 1, the tower body 1 and the condenser 21, the condenser 21 and the reflux device 3, and the reflux device 3 and the tower body 1 are all connected through a hose circulation, a feed port 101 is fixedly connected to the middle of the tower body 1, the feed port 101 is connected to the inside of the tower body 1, and a plurality of mutually staggered tower plates 4 are fixedly connected to the inside of the tower body 1.

[0037] like Figure 4 The tower plate 4 includes a plate body 41, a sinking plate 42 fixedly connected to one end of the plate body 41, and a curved tube 43 fixedly connected to the other end of the plate body 41. The sinking plate 42 is lower than the plate body 41, and the upper and lower ends of the curved tube 43 are beyond the plate body 41. The curved tube 43 of one tower plate 4 is opposite to the sinking plate 42 of the adjacent tower plate 4, and the two adjacent tower plates 4 do not contact each other. The plate body 41, the sinking plate 42 and the curved tube 43 form a complete circle in a top view, as shown in FIG. Figure 3 During distillation, the liquid phase as a whole falls downward along the upper curved tube 43 to the next sinking plate 42, then spreads to the plate body 41, and gradually overflows to the curved tube 43, and falls to the next tower plate 4. At the same time, the gas phase moves upward and passes through multiple through holes 401 while holding up the liquid, so that the gas and liquid are fully in contact and heat exchange.

[0038] A plurality of through holes 401 distributed in a rectangular array are bored on the plate body 41, a hole adjustment assembly is installed on the plate body 41, two upper slide rails 503 are installed on the upper end of the plate body 41, the hole adjustment assembly includes a plurality of variable hole strips 51 connected to the upper slide rails 503 and a hole pushing strip 52 located under the plate body 41, and the plurality of variable hole strips 51 are evenly distributed.

[0039] It should be noted that, in this embodiment, the upper slide rail 503 is merely an ordinary mechanical slide rail.

[0040] like Figure 5 , the push hole strips 52 are arranged in plurality, and a plurality of connecting rods 501 are fixedly connected between two adjacent push hole strips 52, so that the plurality of push hole strips 52 are connected as a whole, and two electric slide rails 502 are installed at the lower end of the plate body 41, and the plurality of push hole strips 52 are slidably connected with the electric slide rails 502, and the plurality of variable hole strips 51 correspond to the plurality of push hole strips 52 respectively, and the plurality of variable hole strips 51 and the push hole strips 52 are respectively located between two adjacent rows of through holes 401, and there is a magnetic attraction between the variable hole strips 51 and the push hole strips 52. After liquid leakage, when the control center controls the electric slide rail 502 to work and drive the push hole strips 52 to move, the plurality of variable hole strips 51 can move accordingly, thereby realizing the covering of the upper part of the through hole 401, such as Figure 8, so as to reduce the inner diameter of the through hole 401, so that when the gas passes through this place, the flow rate is increased to a certain extent, so that the supporting force on the liquid is increased, thereby achieving the effect of alleviating leakage.

[0041] like Figure 7 Two pressure sensors 6 are fixedly embedded at the lower end of the plate body 41, and the pressure sensors 6 are connected to the control center signal. The two hole-pushing strips 52 located in the middle each include two shaping strips 521 corresponding to the two electric slide rails 502 respectively and a gas measuring strip 522 fixedly connected between the two shaping strips 521. The gas measuring strip 522 is an arc-shaped elastic structure, and in a natural state, the gas measuring strip 522 does not contact the plate body 41. The two pressure sensors 6 correspond to the middle parts of the two gas measuring strips 522 respectively. When the gas velocity is normal, the upward gas impacts the gas measuring strip 522 to deform it, and then squeezes the pressure sensor 6 to generate force data. When the gas flow rate is unstable or greatly reduced, the data on the pressure sensor 6 will change significantly. After receiving the signal, the control center can determine that it is a liquid leakage, thereby controlling the hole-adjusting component to reduce the aperture, and at the same time controlling the alarm to sound an alarm, so that the staff can take corresponding measures in time to reduce safety hazards.

[0042] like Figure 8 The length and width of the variable hole strip 51 and the push hole strip 52 are the same, and the widths of both are smaller than the distance between two adjacent through holes 401. The edge of the variable hole strip 51 is flush with the edges of a plurality of through holes 401 in an adjacent row, and the push hole strip 52 is flush with the edges of another adjacent row of plurality of through holes 401.

[0043] The ends of the variable hole strip 51 and the hole pushing strip 52 that are relatively far away from each other are staggered, and the ends that are close to each other overlap in a top-down view, and the width of the overlapping portion of the two is not less than half of the width of the variable hole strip 51, so that the overlapping portion of the two is relatively large, and the magnetic attraction strength between the two is high. When the hole pushing strip 52 is moving, the variable hole strip 51 can move smoothly with it, which is convenient for stable adjustment of the through hole 401.

[0044] In summary, through the coordinated arrangement of the hole-adjusting component and the pressure sensor 6, when leakage occurs, the obvious reduction in gas phase velocity and load will be sensed and monitored by the pressure sensor 6, based on which it can be determined whether leakage occurs. Compared with the prior art, the leakage can be detected before obvious temperature and pressure abnormalities occur, which is convenient for the staff to deal with in time, effectively reducing the impact on the ethanol distillation efficiency, and effectively avoiding the occurrence of temperature and pressure out of control; in addition, after the leakage occurs, the hole-adjusting component can timely narrow the passable range of the upper opening of the through hole, so that when the gas passes through this place, the supporting force of the liquid is enhanced to a certain extent, thereby effectively alleviating the leakage, and effectively slowing down the amplitude of temperature and pressure changes before the staff starts maintenance, further reducing safety hazards.

[0045] The second implementation method:

[0046] Based on the first embodiment, this embodiment changes the arrangement of the hole adjustment component and its related contents, and the rest is consistent with the first embodiment.

[0047] Specifically, in this embodiment, the upper slide rail 503 is an electric slide rail, and the electric slide rail 502 is not provided.

[0048] In addition, if Fig. 9 and Fig.10 Two push hole strips 52 are provided, and both push hole strips 52 are fixedly connected to the bottom of the plate body 41, and the middle parts of the two push hole strips 52 correspond to the two pressure sensors 6 respectively. The variable hole strip 51 is located between two adjacent rows of through holes 401, and a plurality of reduced diameter holes 402 corresponding to the plurality of through holes 401 are drilled on the variable hole strip 51, and the inner diameter of the through hole 401 is 2-3 times the inner diameter of the reduced diameter hole 402.

[0049] like Fig.11 and Fig.12 There are two inverted convex half holes under the variable hole strip 51, and floating blocks are arranged in the two inverted convex half holes. A plurality of electric sliders are installed in the upper slide rail 503, and an electromagnetic sheet 72 is electrically connected to the electric slider. The plurality of electromagnetic sheets 72 correspond to the plurality of variable hole strips 51 respectively, and the electromagnetic sheets 72 are connected to the control center signal. The floating block includes an I-shaped floating block 71, and two elastic telescopic rods 73 fixedly connected between the bottom of the inverted convex half hole and the I-shaped floating block 71. The lower end of the I-shaped floating block 71 extends into the upper slide rail 503, and the upper slide rail 503 is a positive convex shape. When the electromagnetic sheet 72 is energized, a magnetic attraction is generated on the I-shaped floating block 71.

[0050] It is worth noting that the directions of two adjacent movements of each electric slider are different, but the moving distances are the same, and each moving distance does not exceed the distance between two adjacent variable hole bars 51 .

[0051] When the gas phase is stable, the electromagnetic sheet 72 is powered off, and the I-shaped floating block 71 is in a state of floating on the upper slide rail 503. At this time, the I-shaped floating block 71 and the electromagnetic sheet 72 are separated from each other. Fig.13 When the pressure sensor 6 determines that there is leakage on the tower plate 4, the control center controls the multiple electromagnetic sheets 72 to be energized at the same time, and absorbs the I-shaped floating block 71, so that it moves downward and adheres to the electromagnetic sheet 72, and forms a whole with the electric slide. At this time, the electric slide rail can simultaneously drive the multiple variable hole strips 51 to move, so that they cover the multiple through holes 401 in adjacent rows, and move the reduced diameter hole 402 to the top of the through hole 401, so that the aperture through which the gas can pass is reduced from the inner diameter of the through hole 401 to the inner diameter of the reduced diameter hole 402, thereby reducing the diameter and achieving the effect of increasing the gas flow rate and the liquid supporting force.

[0052] Compared with the first embodiment, in this embodiment, the reduction of the aperture of the through hole 401 is regular; in addition, the control center can also control the power on and off of multiple electromagnetic sheets 72 at different times to achieve the goal of only controlling the movement of part of the variable hole strips 51 and changing the aperture of part of the through hole 401 to adapt to different situations.

[0053] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A distillation tower for ethanol purification, characterized in that: The tower body (1) comprises a control center and an alarm, a condenser (21), a reflux device (3) and a reboiler (22), wherein the reboiler (22) is close to the lower end of the tower body (1), and the inlet and outlet of the reboiler (22) are both connected to the tower body (1) through a pipeline, the condenser (21) and the reflux device (3) are both close to the upper end of the tower body (1), the tower body (1) and the condenser (21), the condenser (21) and the reflux device (3), and the reflux device (3) and the tower body (1) are all connected in a circulation manner through a hose, and a feed port (101) is fixedly connected to the middle of the tower body (1), and the feed port (101) is connected to the inside of the tower body (1); The tower body (1) is fixedly connected with a plurality of tower plates (4) which are staggered and distributed with each other. The tower plates (4) include a plate body (41), a sinking plate (42) fixedly connected to one end of the plate body (41), and a curved tube (43) fixedly connected to the other end of the plate body (41). The sinking plate (42) is lower than the plate body (41). Both upper and lower ends of the curved tube (43) extend beyond the plate body (41). The plate body (41) is provided with a plurality of through holes (401) distributed in a rectangular array. A hole adjustment component is installed on the plate body (41). Two upper slide rails (503) are installed at the upper end of the plate body (41). The hole adjustment component includes a plurality of variable hole strips (51) which are connected to the upper slide rails (503) and a hole pushing strip (52) located below the plate body (41). The plurality of variable hole strips (51) are evenly distributed. Two pressure sensors (6) are fixedly embedded at the lower end of the plate body (41). The pressure sensors (6) are connected to the control center signal. The length and width of the variable hole strip (51) and the hole pushing strip (52) are the same, and the widths of both are smaller than the distance between two adjacent through holes (401); the edge of the variable hole strip (51) is flush with the edge of an adjacent row of multiple through holes (401), and the edge of the hole pushing strip (52) is flush with the edge of another adjacent row of multiple through holes (401); the ends of the variable hole strip (51) and the hole pushing strip (52) that are far away from each other are staggered, and the ends of the two that are close to each other overlap in a top view, and the width of the overlapping portion of the two is not less than half the width of the variable hole strip (51).

2. A distillation tower for ethanol purification according to claim 1, characterized in that: The cambered tube (43) of one tower plate (4) is opposite to the sinking plate (42) of the adjacent tower plate (4), and the two adjacent tower plates (4) do not contact each other. The plate body (41), the sinking plate (42) and the cambered tube (43) form a complete circle in a top view cross section.

3. A distillation tower for ethanol purification according to claim 1, characterized in that: The hole-pushing bars (52) are arranged in plurality, and a plurality of connecting rods (501) are fixedly connected between two adjacent hole-pushing bars (52). Two electric slide rails (502) are installed at the lower end of the plate body (41). The plurality of hole-pushing bars (52) are all slidably connected to the electric slide rails (502). The plurality of hole-changing bars (51) correspond to the plurality of hole-pushing bars (52), and the plurality of hole-changing bars (51) and the hole-pushing bars (52) are respectively located between two adjacent rows of through holes (401). There is a magnetic attraction between the hole-changing bars (51) and the hole-pushing bars (52).

4. A distillation tower for ethanol purification according to claim 3, characterized in that: The two hole-pushing strips (52) located in the middle each include two shaping strips (521) corresponding to the two electric slide rails (502) respectively, and a gas measuring strip (522) fixedly connected between the two shaping strips (521); the gas measuring strip (522) is an arc-shaped elastic structure, and in a natural state, the gas measuring strip (522) does not contact the plate body (41); the two pressure sensors (6) respectively correspond to the middle parts of the two gas measuring strips (522).

5. A distillation tower for ethanol purification according to claim 1, characterized in that: Two hole-pushing bars (52) are provided, and both hole-pushing bars (52) are fixedly connected to the bottom of the plate body (41); the middle parts of the two hole-pushing bars (52) correspond to two pressure sensors (6) respectively; the variable hole bar (51) is located between two adjacent rows of through holes (401); and the variable hole bar (51) is provided with a plurality of reduced diameter holes (402) corresponding to the plurality of through holes (401) respectively; and the inner diameter of the through hole (401) is 2-3 times the inner diameter of the reduced diameter hole (402).

6. A distillation tower for ethanol purification according to claim 5, characterized in that: Two inverted convex half holes are bored below the variable hole strip (51), and floating blocks are provided in the two inverted convex half holes. A plurality of electric sliders are installed in the upper slide rail (503), and an electromagnetic sheet (72) is electrically connected to the electric slider. The plurality of electromagnetic sheets (72) respectively correspond to the plurality of variable hole strips (51), and the electromagnetic sheets (72) are connected to a control center signal.

7. A distillation tower for ethanol purification according to claim 6, characterized in that: The floating block comprises an I-shaped floating block (71) and two elastic telescopic rods (73) fixedly connected between the bottom of the inverted convex half hole and the I-shaped floating block (71); the lower end of the I-shaped floating block (71) extends into the upper slide rail (503), and the upper slide rail (503) is a positive convex shape.

8. A distillation tower for ethanol purification according to claim 7, characterized in that: When the electromagnetic sheet (72) is energized, it generates a magnetic attraction force on the I-shaped floating block (71).

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