Rectification device for preparing ethylene glycol butyl ether

Abstract

The application relates to a rectification device for preparing ethylene glycol butyl ether and relates to the technical field of ethylene glycol butyl ether preparation. The rectification device comprises a rectification tower body, input pipes and output pipes are communicated with the side walls of the rectification tower body, a heating mechanism is arranged on the inner bottom wall of the rectification tower body, a separation sleeve is vertically arranged in the rectification tower body, the top of the separation sleeve is open, a condensation pipe is arranged in the separation sleeve, a drain pipe is connected with the side wall of the separation sleeve, and the output end of the drain pipe penetrates through the rectification tower body. The application has the effect of fully separating ethylene glycol butyl ether from water.

Description

Technical Field

[0001] This application relates to the field of ethylene glycol butyl ether preparation technology, and in particular to a distillation apparatus for the preparation of ethylene glycol butyl ether. Background Technology

[0002] Ethylene glycol butyl ether, also known as 2-butoxyethanol or butyl cellosolve, is a colorless and transparent liquid with a slight ether odor. It is readily miscible with organic solvents such as water, ethanol, diethyl ether, acetone, and benzene, as well as mineral oil, forming a homogeneous solution. In existing technologies, the preparation of ethylene glycol butyl ether usually employs a catalytic method involving ethylene glycol and butanol. The reaction principle involves the dehydration condensation of ethylene glycol and butanol under the action of an acidic catalyst to form an ether bond. However, this method is not easy to separate ethylene glycol butyl ether and water in the subsequent process, and the energy consumption for separation is relatively high, thus requiring improvement. Utility Model Content

[0003] In order to fully separate ethylene glycol butyl ether from water, this application provides a distillation apparatus for the preparation of ethylene glycol butyl ether.

[0004] The distillation apparatus for preparing ethylene glycol butyl ether provided in this application adopts the following technical solution:

[0005] A distillation apparatus for preparing ethylene glycol butyl ether includes a distillation column body, an input pipe and an output pipe connected to the side wall of the distillation column body, a heating mechanism provided on the bottom wall inside the distillation column body, a vertically arranged partition sleeve inside the distillation column body, an opening at the top of the partition sleeve, a condenser tube provided inside the partition sleeve, and a drain pipe connected to the side wall of the partition sleeve, with the output end of the drain pipe passing through the distillation column body.

[0006] By adopting the above technical solution, a mixed solution of ethylene glycol butyl ether and water is introduced into the distillation column through the inlet pipe. The heating mechanism is activated. Since the boiling points of ethylene glycol butyl ether and water are significantly different, during the introduction of the mixed solution, the liquid phase flows downward while the gas phase rises continuously, thus entering the separator sleeve. The vapor is condensed through the condenser tube and discharged as water droplets through the drain pipe. This cycle is repeated to achieve the distillation of the mixed solution of ethylene glycol butyl ether and separate ethylene glycol butyl ether and water.

[0007] Preferably, the distillation column body includes a column body and a column cover, the bottom wall of the column cover is provided with a closed cover, the closed cover is closed above the partition sleeve, and the closed cover is provided with a number of steam inlets for steam to enter.

[0008] By adopting the above technical solution, the closed hood can collect the steam, allowing it to condense in a smaller space. This reduces the leakage of cold air and effectively increases the condensation rate of the steam, thereby reducing the energy consumption for separating water and ethylene glycol butyl ether.

[0009] Preferably, a negative pressure mechanism is provided inside the separator sleeve, and a control component for opening and closing the steam inlet is provided inside the closed cover.

[0010] By adopting the above technical solution, the negative pressure mechanism can effectively increase the rate at which steam enters the separator sleeve, thereby further improving the efficiency of steam condensation.

[0011] Preferably, the control assembly includes a plurality of opening and closing plates, a plurality of connecting rods, a rotating rod, and a rotating component, wherein the opening and closing plates, connecting rods, and steam inlet correspond one-to-one; the inner wall of the closed hood is arc-shaped, the opening and closing plates are arc-shaped to fit the inner wall of the closed hood, the opening and closing plates abut against the inner wall of the closed hood, the arc of the opening and closing plates is greater than the arc of the steam inlet, the connecting rods are connected to the inner wall of the corresponding opening and closing plates, the ends of the plurality of connecting rods far from the closing plates are all set towards the axis of the closed hood, the rotating rod is set at the axis of the closed hood, the plurality of connecting rods are all connected to the rotating rod, the rotating component is set on the top wall of the tower cover, and the output shaft of the rotating component passes through the tower cover and is connected to the rotating rod.

[0012] By adopting the above technical solution, when it is necessary to open the steam inlet, the rotating component is activated, which drives the rotating rod to rotate. Through the connecting support rods, the opening and closing plates rotate relative to the closed cover, thereby opening the corresponding steam inlet. The steam located between the partition sleeve and the tower body can then surge towards the steam inlet under the action of the negative pressure mechanism, thereby improving the steam entry speed and condensation efficiency. When the partition sleeve is filled with steam, the rotating component resets, thereby closing the steam inlet to prevent steam or condensed water droplets from escaping.

[0013] Preferably, the peripheral wall of the closed shroud is provided with a guide surface for guiding steam toward the steam inlet.

[0014] By adopting the above technical solution, the flow guiding surface is set to facilitate the steam to be guided into the separator sleeve, thereby effectively improving the efficiency of steam condensation.

[0015] Preferably, a heat insulation pad is provided at the bottom of the separator sleeve.

[0016] By adopting the above technical solution, the heat insulation pad can maintain the low temperature inside the separator sleeve, thereby preventing the condensed water droplets from evaporating again due to heat, thus effectively improving the working efficiency of the distillation device of this application.

[0017] Preferably, the distillation column is provided with a plurality of floating valve trays, which are distributed along the height of the distillation column. Support rods are provided between adjacent floating valve trays, and the size of the holes in the floating valve trays gradually decreases from top to bottom.

[0018] By adopting the above technical solution, the floating valve tray can filter particulate matter and impurities in the solution. On the one hand, it can effectively improve the purity of ethylene glycol butyl ether, and on the other hand, it can reduce the pressure on cleaning the bottom of the tower and reduce the cleaning frequency, thereby reducing the labor intensity of the staff.

[0019] Preferably, the top wall of the tower body is provided with a clearance groove, and an electric telescopic rod is provided in the clearance groove. The piston rod of the electric telescopic rod is arranged in a vertical direction and is connected to the tower cover.

[0020] By adopting the above technical solution, the installation of electric telescopic rods facilitates the separation of the tower body from the tower cover, thereby enabling staff to perform regular maintenance on the internal structure of the tower body, which is highly convenient.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. A mixed solution of ethylene glycol butyl ether and water is fed into the distillation column through the inlet pipe. The heating mechanism is activated. Due to the significant difference in boiling points between ethylene glycol butyl ether and water, the liquid phase flows downward and the gas phase rises continuously during the feeding of the mixed solution. The vapor then enters the separator sleeve and is condensed through the condenser. The vapor condenses into water droplets and is discharged through the drain pipe. This cycle repeats, achieving the distillation of the ethylene glycol butyl ether mixed solution and separating ethylene glycol butyl ether and water.

[0023] 2. Setting up a closed hood can collect the steam, allowing it to condense in a more confined space. This reduces the leakage of cold air and effectively increases the condensation rate of the steam, thereby reducing the energy consumption for separating water and ethylene glycol butyl ether. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a distillation apparatus for preparing ethylene glycol butyl ether according to an embodiment of this application.

[0025] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0026] Explanation of reference numerals in the attached drawings: 1. Distillation column body; 11. Column body; 111. Clearance groove; 112. Electric telescopic rod; 12. Column cover; 2. Inlet pipe; 3. Outlet pipe; 4. Heating mechanism; 5. Separating sleeve; 51. Condenser; 52. Drain pipe; 6. Closing hood; 61. Steam inlet; 62. Guide surface; 7. Negative pressure mechanism; 8. Control component; 81. Opening and closing plate; 82. Connecting support rod; 83. Rotating rod; 84. Rotating component; 9. Heat insulation pad; 10. Floating valve tray; 101. Support rod. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0028] This application discloses a distillation apparatus for the preparation of ethylene glycol butyl ether. (Refer to...) Figure 1 and Figure 2 The distillation column includes a column body 1, which includes a column body 11 and a column cover 12. The column body 11 is vertically arranged, and a clearance groove 111 is opened on the top wall of the column body 11. The clearance groove 111 is opened along the height direction, and an electric telescopic rod 112 is installed in the clearance groove 111. The piston rod of the electric telescopic rod 112 moves in the vertical direction. The piston rod of the electric telescopic rod 112 is connected to the column cover 12 to control the opening and closing of the column cover 12 and the column body 11, so as to realize automated operation and facilitate the staff to perform regular maintenance on other components inside the column body 11.

[0029] Reference Figure 1 and Figure 2 The tower body 11 has an input pipe 2 and an output pipe 3 connected to its side wall. The input pipe 2 is located at the upper end of the tower body 11, and the output pipe 3 is located at the lower end of the tower body 11. The input pipe 2 leads into the tower body 11 to introduce a mixed solution of ethylene glycol butyl ether. A partition sleeve 5 is vertically installed inside the tower body 11. Several floating valve trays 10 are installed between the partition sleeve 5 and the inner wall of the tower body 11. The floating valve trays 10 are distributed vertically, and a support rod 101 is installed between adjacent floating valve trays 10 to maintain the balance and stability of the floating valve trays 10. The size of the pores of the floating valve trays 10 gradually decreases from top to bottom to filter particulate impurities in the mixed solution, thereby improving the purity of ethylene glycol butyl ether and reducing the cleaning frequency and cleaning pressure inside the tower body 11.

[0030] Reference Figure 1 and Figure 2 A heating mechanism 4 is provided at the bottom of the tower body 11. In this embodiment, the heating mechanism 4 uses an electric heating wire to heat the mixed solution, and then separates the water and ethylene glycol butyl ether based on the principle that the boiling points of ethylene glycol butyl ether and water are significantly different. The top of the separator sleeve 5 is open, and a condenser pipe 51 is provided inside to condense the vapor entering the separator sleeve 5. A drain pipe 52 is provided at the bottom of the separator sleeve 5, and the outlet of the drain pipe 52 passes through the tower body 11 to discharge the condensed water. In this embodiment, a heat insulation pad 9 is provided at the bottom of the separator sleeve 5 to insulate the heat of the heating mechanism 4, thereby maintaining a low temperature environment inside the separator sleeve 5 and ensuring condensation efficiency. The separator sleeve 5 is also made of heat insulation material, such as ceramic.

[0031] Reference Figure 1 and Figure 2The bottom wall of the tower cover 12 is provided with a closed cover 6, which covers the top of the partition sleeve 5. The closed cover 6 is cylindrical, and a flow guide surface 62 is provided around the closed cover 6. The diameter of the flow guide surface 62 gradually decreases from the outside to the inside. Several steam inlets 61 are provided at the smallest point of the flow guide surface 62 so that steam can enter.

[0032] Reference Figure 1 and Figure 2 A negative pressure mechanism 7 is installed inside the separator sleeve 5. In this embodiment, the negative pressure mechanism 7 uses a negative pressure fan to increase the rate at which steam enters the separator sleeve 5. A control component 8 is installed on the heat insulation cover to control the opening and closing of the steam inlet 61. The control component 8 includes several opening and closing plates 81, several connecting rods 82, rotating rods 83, and rotating parts 84. The opening and closing plates 81, connecting rods 82, and steam inlet 61 are arranged in a one-to-one correspondence. The inner wall of the closed cover 6 is arc-shaped, and the opening and closing plates 81 are arc-shaped to fit the inner wall of the closed cover 6. Plate 81 abuts against the inner wall of the opening and closing hood. The curvature of the opening and closing plate 81 is greater than that of the steam inlet 61. Connecting support rod 82 is connected to the inner wall of the corresponding opening and closing plate 81. The ends of several connecting support rods 82 that are far from the plate 81 are all arranged in the direction of the axis of the closed hood 6. Rotating rod 83 is arranged at the axis of the closed hood 6. Several connecting support rods 82 are all connected to rotating rod 83. Rotating component 84 is arranged on the top wall of tower cover 12. The output shaft of rotating component 84 passes through tower cover 12 and is connected to rotating rod 83. In this embodiment, the number of steam inlets 61 is 2.

[0033] The implementation principle of the distillation apparatus for preparing ethylene glycol butyl ether according to an embodiment of this application is as follows: A mixed solution of ethylene glycol butyl ether and water is introduced into the distillation column 1 through the input pipe 2. The heating mechanism 4 is activated. Since the boiling points of ethylene glycol butyl ether and water are significantly different, during the input of the mixed solution, the liquid phase flows downward while the gas phase rises continuously. The negative pressure mechanism 7 is activated, allowing steam to enter the separator sleeve 5. When the separator sleeve 5 is filled with steam, the negative pressure mechanism 7 is closed, the control component 8 closes the steam inlet 61, and the condenser 51 is activated. The steam is condensed into water droplets through the condenser 51 and discharged through the drain pipe 52. This cycle is repeated to achieve the distillation of the mixed solution of ethylene glycol butyl ether, thereby separating ethylene glycol butyl ether and water and reducing energy consumption.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A distillation apparatus for the preparation of ethylene glycol butyl ether, characterized in that: The distillation column includes an input pipe and an output pipe connected to its side wall. A heating mechanism is installed on the bottom wall inside the distillation column. A partition sleeve is also vertically installed inside the distillation column. The partition sleeve has an opening at the top and a condenser is installed inside the partition sleeve. A drain pipe is connected to the side wall of the partition sleeve, and the output end of the drain pipe passes through the distillation column.

2. The distillation apparatus for preparing ethylene glycol butyl ether according to claim 1, characterized in that: The distillation column includes a column body and a column cover. The bottom wall of the column cover is provided with a closed cover, which covers the upper part of the partition sleeve. The closed cover has several steam inlets for steam to enter.

3. The distillation apparatus for preparing ethylene glycol butyl ether according to claim 2, characterized in that: The separator sleeve is equipped with a negative pressure mechanism, and the closed cover is equipped with a control component for opening and closing the steam inlet.

4. The distillation apparatus for preparing ethylene glycol butyl ether according to claim 3, characterized in that: The control assembly includes several opening and closing plates, several connecting rods, a rotating rod, and a rotating component. The opening and closing plates, connecting rods, and steam inlets correspond one-to-one. The inner wall of the closed hood is arc-shaped, and the opening and closing plates are arc-shaped to fit the inner wall of the closed hood. The opening and closing plates abut against the inner wall of the closed hood, and the arc of the opening and closing plates is greater than the arc of the steam inlet. The connecting rods are connected to the inner wall of the corresponding opening and closing plates. The ends of the connecting rods furthest from the closing plates are all oriented towards the axis of the closed hood. The rotating rod is located at the axis of the closed hood, and the connecting rods are all connected to the rotating rod. The rotating component is located on the top wall of the tower cover, and the output shaft of the rotating component passes through the tower cover and is connected to the rotating rod.

5. The distillation apparatus for preparing ethylene glycol butyl ether according to claim 2, characterized in that: The closed shroud has a guide surface on its peripheral wall for guiding steam toward the steam inlet.

6. The distillation apparatus for preparing ethylene glycol butyl ether according to claim 1, characterized in that: A heat insulation pad is provided at the bottom of the separator sleeve.

7. The distillation apparatus for preparing ethylene glycol butyl ether according to claim 1, characterized in that: The distillation column is provided with several floating valve trays, which are distributed along the height of the distillation column. Support rods are provided between adjacent floating valve trays, and the size of the holes in the floating valve trays gradually decreases from top to bottom.

8. The distillation apparatus for preparing ethylene glycol butyl ether according to claim 2, characterized in that: The top wall of the tower body is provided with a clearance groove, and an electric telescopic rod is installed in the clearance groove. The piston rod of the electric telescopic rod is arranged in a vertical direction and is connected to the tower cover.

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