CN112569626B

CN112569626B - Double-tower rectifying device for preparing tert-butylamine

Info

Publication number: CN112569626B
Application number: CN202110207258.9A
Authority: CN
Inventors: 王荣军; 王春刚; 王栋; 许文军
Original assignee: Shandong Yabang Chemical Technology Co ltd
Current assignee: Shandong Yabang Chemical Technology Co ltd
Priority date: 2021-02-25
Filing date: 2021-02-25
Publication date: 2021-06-08
Anticipated expiration: 2041-02-25
Also published as: CN112569626A

Abstract

The utility model provides a preparation tert-butylamine is with two tower rectifier unit, belongs to the rectification field, including two rectifying column, the crisscross column plate that sets up of equal fixed mounting several in the rectifying column, the vertical axis of placing around two equal fixed mounting in the rectifying column all runs through the column plate, and the periphery of vertical axis all rotates installation several axle sleeve, passes through torsional spring connection between every axle sleeve and the vertical axis that corresponds. The invention can clean the tower plate in the rectifying process without stopping the rectifying tower, thereby improving the use efficiency of the equipment, in addition, the first piston pipe and the first piston are arranged between the rectifying tower and the condenser, the time of the steam leaving the tower can be prolonged, the invention is beneficial to reducing the unreacted materials contained in the steam, improving the rectifying effect, consuming a part of heat energy of the steam in the process of pushing the first piston to move by the steam, reducing the burden of the condenser and prolonging the service life of the condenser.

Description

Double-tower rectifying device for preparing tert-butylamine

Technical Field

The invention belongs to the field of rectification, and particularly relates to a double-tower rectification device for preparing tert-butylamine.

Background

Tertiary butylamine is an important organic intermediate, and has wide application in the fields of medicines, pesticides and synthetic rubber, a double-tower rectification process is adopted for obtaining a high-purity tertiary butylamine product, a tower plate in a rectification tower can be blocked in the using process of the rectification tower, so that the purity of the tertiary butylamine cannot meet the requirement, the rectification tower has a large self volume and is troublesome to clean, if the work of stopping the rectification tower is used for cleaning the inside, a large amount of manpower and time are required to be consumed, and the rectification tower cannot rapidly enter the production and use again.

Disclosure of Invention

The invention provides a double-tower rectifying device for preparing tert-butylamine, which is used for overcoming the defects in the prior art.

The invention is realized by the following technical scheme:

a double-tower rectifying device for preparing tert-butylamine comprises two rectifying towers, wherein a plurality of staggered tower plates are fixedly installed in each rectifying tower, two vertical shafts which are placed front and back are fixedly installed in each rectifying tower, each vertical shaft penetrates through each tower plate, a plurality of shaft sleeves are rotatably installed on the peripheries of the vertical shafts, each shaft sleeve is connected with the corresponding vertical shaft through a torsion spring, a transverse rod is fixedly installed on the periphery of each shaft sleeve and is located below the corresponding tower plate, a plurality of elastic rods are fixedly installed on the top surface of each transverse rod, a U-shaped plate is arranged on one side, away from the transverse rod, of each vertical shaft, each U-shaped plate corresponds to the two shaft sleeves, openings of the U-shaped plates face the vertical shafts, each two adjacent U-shaped plates are connected through a connecting rod, the tops of the opposite sides of the two rectifying towers are fixedly connected with one end of a steam exhaust pipe, a first electric valve is fixedly installed on the steam exhaust pipe, the other ends of the two steam exhaust pipes are fixedly connected, the device comprises a first piston, a first pipeline, a condenser, a first piston pipe, a second piston pipe, a rectifying tower, a first piston, a second piston pipe, a steam inlet pipe, a steam outlet pipe, a steam inlet pipe, a steam outlet pipe, a steam inlet.

The double-tower rectifying device for preparing tert-butylamine is characterized in that the sealing element is a sealing ring.

According to the double-tower rectifying device for preparing tert-butylamine, two sides of the top of the inner wall of the first piston tube are fixedly connected with one end of the third pipeline, the other end of the third pipeline is fixedly connected with the first pipeline, the first pipeline and the third pipeline are communicated with each other, and the third pipeline is provided with the third electric valve.

According to the double-tower rectifying device for preparing tert-butylamine, the first electric valve, the second electric valve and the third electric valve are all in circuit connection with the PLC.

The invention has the advantages that: the device is used for cleaning without stopping the machine in the rectifying process, in the using process, materials to be rectified are preheated by a preheater and then conveyed into a rectifying tower from a feeding pipe, after reaction for a period of time, gas accumulated at the top of the rectifying tower enters a condenser through a steam exhaust pipe, a first piston pipe and a first pipeline for condensation, one part of condensed liquid enters the top of the rectifying tower again through a return pipe, the other part of liquid is pumped into the feeding pipe and then enters the rectifying tower again together with raw materials after being preheated, meanwhile, a user enables a first electric valve and a second electric valve to be alternately opened, after the first electric valve on one steam exhaust pipe is opened, steam enters the first piston pipe from the steam exhaust pipe, the steam pushes the first piston to move, when the first piston is positioned between the steam exhaust pipe and the first pipeline, because the second electric valve close to the steam exhaust pipe is not opened, steam can not be discharged, the steam continuously pushes the first piston to move, when the first piston moves to the steam exhaust pipe and is communicated with the first pipeline, the steam can enter the condenser from the first pipeline, a part of heat energy can be consumed by the steam in the process of pushing the first piston to move, so that the condensing time of the condenser is shortened, the steam between the first piston and the other steam exhaust pipe is pressed into the corresponding second piston pipe through the second pipeline by the continuous movement of the first piston, the second piston starts to move, the second piston moves to drive the U-shaped plates to move through the connecting rods, one part of the U-shaped plates moves towards the direction close to the vertical shaft, the other part of the U-shaped plates is far away from the vertical shaft, the U-shaped plates close to the vertical shaft can drive the two cross rods positioned in the same longitudinal plane to swing, at the moment, the included angle between the two cross rods is reduced, and as the first electric valve and the second electric valve are alternately, when the second electric valve of first electric valve in addition was opened, the part U template that was close to the vertical axis originally can be to keeping away from the direction of vertical axis and moving one section distance, contained angle between two horizontal poles increases once more under the effect of torsional spring this moment, the time of opening through the control valve makes the gross motion trend that corresponds two horizontal poles be close to each other, the reciprocal swing of horizontal pole can give the time of a return of elastic rod, thereby it is downthehole to make the elastic rod can kick-back insert on the column plate, first electric valve and second electric valve open in turn after several times, two horizontal poles are parallel, once the clearance process is accomplished. The invention realizes that the tower plate can be cleaned in the rectifying process without stopping the work of the rectifying tower, improves the use efficiency of equipment, in addition, the first piston pipe and the first piston are arranged between the rectifying tower and the condenser, the time for the steam to flow out of the tower can be prolonged, the invention is beneficial to reducing the unreacted materials contained in the steam, improves the rectifying effect, can consume a part of heat energy of the steam in the process of pushing the first piston to move by the steam, reduces the burden of the condenser and prolongs the service life of the condenser; the power comes from the atmospheric pressure of retrieving the material, and the input or the transformation cost of equipment are not high, and it is less to the inside interference of rectifying column, can not influence holistic rectification work.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention; FIG. 2 is an enlarged view of section I of FIG. 1; FIG. 3 is an enlarged view of the view from the direction A of FIG. 1; FIG. 4 is an enlarged view of the view of FIG. 1 taken along line B; FIG. 5 is an enlarged view of a portion II of FIG. 1; fig. 6 is a block diagram of the circuit configuration of the present invention.

Reference numerals: 1. rectifying column, 2, tower plate, 3, vertical shaft, 4, shaft sleeve, 5, cross bar, 6, elastic rod, 7, U-shaped plate, 8, connecting rod, 9, exhaust pipe, 10, first electric valve, 11, first piston pipe, 12, first piston, 13, torsion spring, 14, first pipeline, 15, condenser, 16, second pipeline, 17, second electric valve, 18, second piston pipe, 19, second piston, 20, movable rod, 21, inlet pipe, 22, third pipeline, 23, third electric valve, 24, preheater, 25, pump.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A double-tower rectifying device for preparing tert-butylamine is shown in the figure and comprises two rectifying towers 1, a reboiler related to rectification reaction, a tert-butylamine discharging pipe and the like which are not described, a plurality of staggered tower plates 2 are fixedly arranged in each rectifying tower 1, two vertical shafts 3 which are arranged front and back are fixedly arranged in each rectifying tower 1, the vertical shafts 3 penetrate through the tower plates 2, a plurality of shaft sleeves 4 are rotatably arranged on the peripheries of the vertical shafts 3, the number of the shaft sleeves 4 on each vertical shaft 3 is the same as that of the tower plates 2, each shaft sleeve 4 is connected with the corresponding vertical shaft 3 through a torsion spring 13, the torsion spring 13 enables two transverse rods 5 in the same plane to have the trend of moving back and forth, transverse rods 5 are fixedly arranged on the peripheries of the shaft sleeves 4, the transverse rods 5 are respectively positioned below the corresponding tower plates 2, two transverse rods 5 positioned below the same tower plate 2 are positioned in the same longitudinal plane, a plurality of elastic rods 6 are fixedly arranged on the top surfaces of the transverse rods 5, the side of the vertical shaft 3 far away from the transverse rods 5 is provided with U-shaped plates 7, each U-shaped plate 7 corresponds to two shaft sleeves 4, the openings of the U-shaped plates 7 face the vertical shaft 3, when three side surfaces of the inner wall of each U-shaped plate 7 are contacted with the corresponding shaft sleeves 4, the two transverse rods 5 can be just in parallel, the longitudinal length of each transverse rod 5 is the same as the diameter of each shaft sleeve 4, therefore, when the two corresponding transverse rods 5 are parallel, the two transverse rods 5 are also contacted with each other, every two adjacent U-shaped plates 7 are connected through a connecting rod 8, so that the plurality of U-shaped plates 7 can move synchronously, the tops of the opposite sides of the two rectifying towers 1 are fixedly connected with one end of a steam exhaust pipe 9, the steam exhaust pipe 9 is fixedly provided with first electric valves 10, the first electric valves 10 are both connected with an external power supply circuit, the two first electric valves 10 are opened alternately, and the other ends of the two steam exhaust pipes, a first piston 12 in sliding contact fit with the first piston tube 11 is arranged in the first piston tube 11, the middle part of the top surface of the inner wall of the first piston tube 11 is fixedly connected with one end of a first pipeline 14, the pipe diameter of the first pipeline 14 is smaller than the transverse length of the first piston 12, the other end of the first pipeline 14 is fixedly connected with a steam inlet pipe of a condenser 15, two sides of the bottom surface of the inner wall of the first piston tube 11 are fixedly connected with one end of a second pipeline 16, a second electric valve 17 is fixedly arranged on the second pipeline 16, the second electric valves 17 are connected with an external power supply circuit, the two second electric valves 17 are alternately opened, the alternate frequency is the same as that of the first electric valve 10, the second electric valve 17 and the first electric valve 10 on the same side cannot be simultaneously opened, the other end of the second pipeline 16 is respectively and fixedly connected with the top part of the inner side of the second piston tube 18, the outer side of the second piston tube, the second piston tube 18 is perpendicular to the rectifying tower 1, a second piston 19 in sliding contact with the second piston tube 18 is arranged in the second piston tube 18, the outer sides of the second pistons 19 are fixedly connected with one end of a movable rod 20, the other end of the movable rod 20 penetrates through the corresponding rectifying tower 1 and is fixedly connected with a connecting rod 8 closest to the second piston tube, the movable rod 20 is hermetically connected with the rectifying tower 1 through a sealing piece, the lower part of the rectifying tower 1 is fixedly provided with a feed tube 21, a preheater 24 capable of preheating raw materials is fixedly arranged on the feed tube 21, return tubes of the condenser 15 penetrate through the top surface of the outer wall of the rectifying tower 1 respectively, liquid flowing out of the return tube of the condenser 15 flows back to the top of the rectifying tower 1 to continue to participate in reaction, discharge tubes of the condenser 15 are fixedly connected with the feed tube 21 respectively and are located at the outer sides of the preheater 24, liquid in the discharge tube of the condenser 15 enters the rectifying tower 1 from the feed tube 21 after, a pump 25 is fixedly mounted on the discharge pipe of the condenser 15. The device is used for cleaning without stopping the machine in the rectifying process, in the using process, materials to be rectified are preheated by a preheater 24 and then are conveyed into a rectifying tower 1 from a feeding pipe 21, after reaction for a period of time, gas accumulated at the top of the rectifying tower 1 enters a condenser 15 through a steam exhaust pipe 9, a first piston pipe 11 and a first pipeline 14 for condensation, one part of condensed liquid enters the top of the rectifying tower 1 again through a return pipe, the other part of condensed liquid is conveyed into the feeding pipe 21 by a pump 25 and then enters the rectifying tower 1 again after being preheated together with raw materials, meanwhile, a user enables a first electric valve 10 and a second electric valve 17 to be alternately opened, after a first electric valve 10 on one steam exhaust pipe 9 is opened, steam can enter the first piston pipe 11 from the steam exhaust pipe 9, the steam can push a first piston 12 to move, when the first piston 12 is positioned between the steam exhaust pipe 9 and the first pipeline 14, because the second electric valve 17 close to the steam exhaust pipe 9 is not opened, steam cannot be exhausted, the steam continues to push the first piston 12 to move, when the first piston 12 moves until the steam exhaust pipe 9 is communicated with the first pipeline 14, the steam can enter the condenser 15 from the first pipeline 14, a part of heat energy can be consumed in the process of pushing the first piston 12 to move, so that the condensing time of the condenser 15 is shortened, the first piston 12 continues to move to press the steam between the first piston 12 and the other steam exhaust pipe 9 into the corresponding second piston pipe 18 through the second pipeline 16, the second piston 19 starts to move, the second piston 19 moves to drive the U-shaped plates 7 to move through the connecting rods 8, wherein one part of the U-shaped plates 7 moves towards the vertical shaft 3, the other part of the U-shaped plates 7 is far away from the vertical shaft 3, the U-shaped plates 7 close to the vertical shaft 3 can drive the two cross rods 5 located in the same longitudinal plane to swing, at this moment, the included angle between the two cross rods 5 is reduced, because the first electric valve 10 and the second electric valve 17 are opened alternately, when the second electric valve 17 of the other first electric valve 10 is opened, the part of the U-shaped plate 7 which is close to the vertical shaft 3 originally can move a certain distance in the direction far away from the vertical shaft 3, the included angle between the two cross rods 5 is increased again under the action of the torsion spring 13, the general movement trend of the two corresponding cross rods 5 is close to each other by controlling the opening time of the valve, the reciprocating swing of the cross rods 5 can give the return time to the elastic rods 6, so that the elastic rods 6 can rebound and be inserted into holes in the tower plate 2, after the first electric valve 10 and the second electric valve 17 are opened alternately for a plurality of times, the two cross rods 5 are parallel, and one cleaning process is completed. The invention realizes that the tower plate 2 can be cleaned in the rectifying process without stopping the work of the rectifying tower 1, thereby improving the use efficiency of the equipment, in addition, the first piston tube 11 and the first piston 12 are arranged between the rectifying tower 1 and the condenser 15, the time of steam leaving the tower can be prolonged, the invention is beneficial to reducing the unreacted materials contained in the steam, improving the rectifying effect, consuming a part of heat energy of the steam in the process of pushing the first piston 12 to move by the steam, reducing the burden of the condenser 15 and prolonging the service life of the condenser 15; power comes from the atmospheric pressure of retrieving the material, and the input or the transformation cost of equipment are not high, and it is less to rectifier 1 inside interference, can not influence holistic rectification work.

Specifically, the sealing member of the present embodiment is a sealing ring. The sealing ring plays a role in sealing and simultaneously cannot block the movable rod 20 from moving left and right.

Specifically, as shown in fig. 1 or 5, two sides of the top of the inner wall of the first piston tube 11 in this embodiment are both fixedly connected to one end of a third tube 22, the other end of the third tube 22 is both fixedly connected to the first tube 14, the first tube 14 and the third tube 22 are communicated with each other, and the third tube 22 is provided with a third electric valve 23. The cleaning of the tower plate 2 is periodic, namely, only one time of cleaning is needed after the rectifying tower 1 works for a period of time, when the tower plate 2 is not needed to be cleaned, a user closes the two second electric valves 17 and opens the two third electric valves 23, so that steam inside the first piston pipe 11 can enter the condenser 15 through the third pipeline 22 and the first pipeline 14, at the moment, the first piston 12 is positioned in the middle of the first piston pipe 11, when the tower plate 2 is needed to be cleaned, the two third electric valves 23 are closed and the two second electric valves 17 are opened, so that the first piston 12 reciprocates in the first piston pipe 11 and drives the U-shaped plate 7 to move, and the operation is very convenient.

Further, as shown in fig. 6, the first electric valve 10, the second electric valve 17 and the third electric valve 23 of the present embodiment are all electrically connected to a PLC controller, which is not shown in the figure. The PLC is used for controlling the opening and closing of the first electric valve 10, the second electric valve 17 and the third electric valve 23, so that the time for opening and closing the valves and the time for switching the valves for one time can be controlled more accurately, the PLC with a timing function is selected and used, the cleaning period interval of the tower plate 2 is set for the PLC, and the regular automatic cleaning of the device can be realized.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a preparation is two tower rectifier unit for tert-butylamine, includes two rectifying column (1), column plate (2) that equal fixed mounting several staggered arrangement in rectifying column (1), its characterized in that: two vertical shafts (3) which are placed front and back are fixedly arranged in a rectifying tower (1), the vertical shafts (3) penetrate through tower plates (2), a plurality of shaft sleeves (4) are rotatably arranged on the peripheries of the vertical shafts (3), each shaft sleeve (4) is connected with the corresponding vertical shaft (3) through a torsion spring (13), a cross rod (5) is fixedly arranged on the periphery of each shaft sleeve (4), each cross rod (5) is positioned below the corresponding tower plate (2), a plurality of elastic rods (6) are fixedly arranged on the top surface of each cross rod (5), a U-shaped plate (7) is arranged on one side, away from the cross rod (5), of each vertical shaft (3), each U-shaped plate (7) corresponds to two shaft sleeves (4), the openings of the U-shaped plates (7) face towards the vertical shafts (3), every two adjacent U-shaped plates (7) are connected through a connecting rod (8), one end of a row pipe (9) is fixedly connected to the tops of the opposite sides of the two rectifying towers, the steam exhaust pipes (9) are fixedly provided with first electric valves (10), the other ends of the two steam exhaust pipes (9) are respectively and fixedly connected with different ends of the same first piston pipe (11), a first piston (12) in sliding contact fit with the first piston pipe (11) is arranged in the first piston pipe (11), the middle part of the top surface of the inner wall of the first piston pipe (11) is fixedly connected with one end of a first pipeline (14), the other end of the first pipeline (14) is fixedly connected with a steam inlet pipe of a condenser (15), both sides of the bottom surface of the inner wall of the first piston pipe (11) are respectively and fixedly connected with one end of a second pipeline (16), the second pipeline (16) is respectively and fixedly provided with a second electric valve (17), the other end of the second pipeline (16) is respectively and fixedly connected with the top part of the inner side of a second piston pipe (18), a second piston (19) in sliding contact fit with the second piston pipe (18) is arranged in the second piston pipe (18), and the outer side of the second piston (19), the other end of the movable rod (20) penetrates through the corresponding rectifying tower (1) and is fixedly connected with a connecting rod (8) which is closest to the other end of the movable rod, the movable rod (20) is connected with the rectifying tower (1) in a sealing mode through a sealing piece, and the feeding pipe (21) is fixedly installed on the lower portion of the rectifying tower (1).

2. The double-tower rectification device for preparing tert-butylamine according to claim 1, wherein: the sealing element is a sealing ring.

3. The double-tower rectification device for preparing tert-butylamine according to claim 1, wherein: the two sides of the top of the inner wall of the first piston pipe (11) are fixedly connected with one end of a third pipeline (22), the other end of the third pipeline (22) is fixedly connected with the first pipeline (14), the first pipeline (14) and the third pipeline (22) are communicated with each other, and a third electric valve (23) is arranged on the third pipeline (22).

4. The double-tower rectification device for preparing tert-butylamine according to claim 3, wherein: the first electric valve (10), the second electric valve (17) and the third electric valve (23) are all connected with a PLC circuit.