CN117379816A - Acetic acid dehydration tower rectifying separation acetic acid and water reaction unit - Google Patents

Acetic acid dehydration tower rectifying separation acetic acid and water reaction unit Download PDF

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Publication number
CN117379816A
CN117379816A CN202311397399.7A CN202311397399A CN117379816A CN 117379816 A CN117379816 A CN 117379816A CN 202311397399 A CN202311397399 A CN 202311397399A CN 117379816 A CN117379816 A CN 117379816A
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China
Prior art keywords
liquid
acetic acid
liquid level
tower
connector
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Chinese (zh)
Inventor
王克璋
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Jinan Acetate Chemical Co ltd
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Jinan Acetate Chemical Co ltd
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Priority to CN202311397399.7A priority Critical patent/CN117379816A/en
Publication of CN117379816A publication Critical patent/CN117379816A/en
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42—Separation; Purification; Stabilisation; Use of additives
    • C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
    • C07C51/44—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation by distillation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/42—Regulation; Control

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

The invention discloses a reaction device for rectifying and separating acetic acid and water by an acetic acid dehydration tower, and relates to the technical field of separation. The acetic acid dehydration tower rectifying separation acetic acid and water reaction device comprises a liquid lifting sensing device, wherein the liquid lifting sensing device is arranged to send a signal to a first-stage processor when the liquid level of a tower kettle is close to an upper warning liquid level line; the infrared distance measuring device is used for measuring the distance between the infrared distance measuring device and the liquid level of the tower kettle liquid; the liquid-lowering sensing device is arranged to send a signal to the first-stage processor when the liquid level of the tower kettle is close to the lower warning liquid level line; and the liquid discharge control device is used for regulating and controlling the discharge rate of the tower kettle liquid. The acetic acid dehydration tower rectifying separation acetic acid and water reaction device realizes automatic perception of whether the liquid level of the tower kettle is close to a warning liquid level line, and is matched with an infrared distance measuring device to measure the liquid level difference of the liquid level of the tower kettle in 0.5s, so that the liquid outlet size of a liquid outlet arc hole at the bottom of the tower kettle is adjusted, and the liquid level of the tower kettle is maintained at a proper height.

Description

Acetic acid dehydration tower rectifying separation acetic acid and water reaction unit
Technical Field
The invention relates to the technical field of separation, in particular to a reaction device for rectifying and separating acetic acid and water by an acetic acid dehydration tower.
Background
Acetic acid and water do not form an azeotrope, but have close boiling points, which is a highly undesirable system. Common rectification and azeotropic rectification processes are the two most common purification modes.
The liquid level of the tower bottom must be kept stable in the rectification operation, and the liquid level change can be caused by the size of the extracted amount of the tower bottom. When the tower kettle liquid is discharged excessively, the liquid level of the kettle is lowered or emptied, so that the circulation quantity of the kettle liquid passing through the reboiler is reduced, heat transfer is poor, light components cannot be steamed out, and the tower top and tower kettle products are unqualified. If the extraction amount at the bottom of the tower is too small, the liquid level of the tower kettle is too high, and the liquid level exceeds a volatilizing pipe in severe cases, so that the resistance of kettle liquid circulation is increased, heat transfer is poor, the kettle temperature is reduced, the operation is affected, and when the liquid level of the kettle is too low, once the kettle is emptied, the pump is not in excessive amount, equipment is worn out, and accidents are caused;
in order to prevent the liquid level from changing in the rectification process, a skilled operator is required to check frequently, in the rectification process, the worker is difficult to detect the change of the liquid level, the liquid level of the tower kettle becomes too high or too low and passes through a warning liquid level line, the worker can maintain the liquid level at a proper height by adjusting the extraction amount after finding, but in the secondary process, adverse phenomena such as material loss, instrument damage and the like are generated.
Therefore, we propose a device for rectifying and separating acetic acid and water by an acetic acid dehydration tower.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a device for rectifying and separating acetic acid and water by an acetic acid dehydration tower, which solves the technical problem that when kettle liquid passes over a warning line, workers are difficult to discover and adjust immediately.
Technical proposal
In order to achieve the above purpose, the invention is realized by the following technical scheme:
a reaction device for rectifying and separating acetic acid and water in an acetic acid dehydration tower comprises a liquid lifting sensing device, a liquid lifting sensing device and a liquid level control device, wherein the liquid lifting sensing device is used for judging the position relationship between the liquid level of a tower kettle and an upper warning water level line;
the liquid lifting sensing device is arranged to send a signal to the first-stage processor when the liquid level of the tower kettle is close to the upper warning liquid level line;
the liquid lifting induction device comprises:
the first barrel is connected with a first guide plate in a sliding manner, the first guide plate is connected with a first floating plate through a first connecting rod, the top of the first barrel is connected with a first connector, and the first connector is connected with a first-stage processor through a first lead;
the infrared distance measuring device is used for measuring the distance between the infrared distance measuring device and the liquid level of the tower kettle liquid;
the liquid-lowering sensing device is arranged to send a signal to the first-stage processor when the liquid level of the tower kettle is close to the lower warning liquid level line;
the liquid sensing device includes:
the second cylinder is connected with a second guide plate in a sliding manner, the second guide plate is connected with a second floating plate through a second connecting rod, the top of the second cylinder is connected with a second connector, the second connector is connected with a first-stage processor through a third wire, and the first-stage processor is connected with a second-stage processor through a fourth wire;
the liquid discharge control device is used for regulating and controlling the discharge rate of the tower kettle liquid;
the liquid discharge control device includes:
the step motor, step motor passes through the fifth wire and is connected with the secondary processor, step motor's rotation portion is connected with the closing plate, and step motor's fixed part is connected with the L board, the L board is connected with the dehydration tower bottom, and the dehydration tower diapire runs through and has offered out the liquid arc hole, the closing plate can rotate along with rotation portion and seal out the liquid arc hole to regulate and control liquid rate.
In a further embodiment, the lift sensing device further comprises: the first fixed plate is connected with the first cylinder body, and one side, far away from the axis of the first cylinder body, of the first fixed plate is connected with the inner wall of the dehydration tower.
In a further embodiment, the first guide plate moves upwards along the axis direction of the first cylinder body under the action of buoyancy along with the first floating plate, the first guide plate contacts the first connector and is communicated with the circuit, at the moment, the bottom of the first guide plate and the upper warning water level line are located at the same height, and the first guide wire sequentially transmits signals communicated with the first connector to the primary processor and the secondary processor.
In a further embodiment, an infrared ranging apparatus includes: the infrared ranging sensor is connected with the inner wall of the dehydration tower through a second connecting plate and is electrically connected with the primary processor through a second lead.
In a further embodiment, the liquid drop sensing device further comprises: the second fixed plate, the both sides of second fixed plate are connected with the side of second barrel, the inner wall of dehydration tower respectively, the second baffle moves down along the axis direction of second barrel under the action of gravity, second baffle contact second connector and intercommunication circuit, at this moment second baffle top and lower warning water line are located same height, the signal that the third wire communicates the second connector is transmitted primary processor, secondary processor in proper order.
In a further embodiment, when the sealing plate is not adjusted, a half of the liquid outlet arc hole is blocked by the sealing plate.
In a further embodiment, after the first connector or the second connector is communicated, the first-stage processor transmits the distance information measured by the 0.5s internal infrared ranging sensor to the second-stage processor, and the second-stage processor obtains the liquid level difference of the tower kettle liquid in 0.5s and regulates the rotation amplitude of the stepping motor accordingly.
In a further embodiment, the stepper motor rotates clockwise after receiving information from the first connector and the stepper motor rotates counter-clockwise after receiving information from the second connector.
Advantageous effects
The invention provides a device for rectifying and separating acetic acid and water by an acetic acid dehydration tower. Compared with the prior art, the method has the following beneficial effects:
1. the motion trend of tower kettle liquid in the dehydration tower is known through the liquid lifting sensing device and the liquid falling sensing device, the liquid outlet amount is regulated and controlled according to the height of the liquid level of the tower kettle liquid measured by the infrared ranging device, the automatic monitoring is realized, the reaction is rapid, and the time and the labor are saved.
2. The rotation direction of the sealing plate is controlled by utilizing the rotation direction of the stepping motor, the size of the liquid outlet arc hole is regulated and controlled by the sealing plate, and the regulation and control are accurate.
3. The upper warning liquid level line is positioned below the actual warning liquid level line, and the lower warning liquid level line is positioned above the actual lower warning liquid level line, so that the liquid level can be prevented from changing too fast to cross the actual warning liquid level line, and sufficient reaction time is reserved for the liquid discharge control device.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of the structure of the present invention after the dehydration column is removed.
Fig. 3 is a schematic view of the lower part of fig. 2.
Fig. 4 is a schematic structural diagram of the liquid lifting sensing device.
Fig. 5 is an exploded view of the liquid lifting sensing device.
Fig. 6 is a schematic structural view of an infrared ranging apparatus.
Fig. 7 is a schematic structural diagram of the liquid-dropping sensing device.
Fig. 8 is an exploded view of the drop sensing device.
Fig. 9 is a schematic view of the lower part of fig. 2.
Fig. 10 is an exploded view of fig. 9.
Fig. 11 is a schematic structural view of the liquid discharge control device.
The reference numerals in the figures are:
1 liter of liquid induction device, 11 first floating plate, 12 first liquid outlet hole, 13 first connecting rod, 14 first guide plate, 15, first cylinder, 16 first connector, 17 first fixed plate, 18 first lead;
2 infrared distance measuring device, 21 infrared distance measuring sensor, 22, second connecting plate, 23 second wire;
the liquid-dropping sensing device 3, the second floating plate 31, the second liquid outlet 32, the second connecting rod 33, the second guide plate 34, the second cylinder 35, the first sealing ring 36, the second fixing plate 37, the second fixing plate 38, the second connector 39, the third lead wire 4, the first-stage processor 5, the fourth lead wire 6 and the fifth lead wire 7;
8 flowing back controlling means, 81 stepper motor, 82 roof, 83 sideboard, 84 closing plate, 85 play liquid arc hole, 86 drain pipe, 87L board, 88 second sealing ring.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
According to the acetic acid dehydration tower rectifying separation acetic acid and water reaction device, the problem that when kettle liquid passes through a warning line, workers are difficult to find and adjust immediately is solved, and when the acetic acid dehydration tower rectifying separation acetic acid and water reaction device is used, whether the liquid level of the kettle is close to the warning liquid level line or not is achieved, and the infrared distance measuring device is matched to measure the liquid level difference of the liquid level of the kettle in 0.5s, so that the liquid outlet size of a liquid outlet arc hole at the bottom of the kettle is adjusted, and the liquid level of the kettle is maintained at a proper height.
The technical scheme in the embodiment of the application aims to solve the technical problems, and the overall thought is as follows: when the liquid lifting sensing device is arranged as that the liquid level of the tower kettle is close to the upper warning liquid level line, a signal is sent to the first-stage processor, when the liquid level of the tower kettle is close to the lower warning liquid level line, a signal is sent to the first-stage processor, after the first-stage processor receives the signal sent by the liquid lifting sensing device or the liquid lowering sensing device, the first-stage processor transmits the information of the liquid level of the tower kettle measured by the infrared ranging device in 0.5s to the second-stage processor, the second-stage processor obtains the liquid level difference of the tower kettle in 0.5s and regulates and controls the rotating direction and the rotating amplitude of the stepping motor, the liquid level of the tower kettle is close to the upper warning liquid level line, the rotating part of the stepping motor drives the sealing plate to rotate anticlockwise, the liquid outlet of the liquid outlet arc hole is enlarged, the liquid level of the tower kettle flowing out in unit time is increased, so that the liquid level of the tower kettle in the dehydrating tower is maintained at a proper height, when the liquid level of the tower kettle is close to a lower warning liquid level line, the rotating part of the stepping motor drives the sealing plate to rotate clockwise, the liquid outlet of the liquid outlet arc hole is enlarged, the liquid level of the tower kettle flowing out in unit time is reduced, so that the liquid level of the tower kettle in the dehydrating tower is maintained at a proper height, the liquid level difference of the tower kettle in 0.5s is ensured, the rotating amplitude of the rotating part of the stepping motor drives the sealing plate is increased, and the capability of accurately regulating and controlling the liquid level of the liquid outlet arc hole is achieved, so that the liquid level of the tower kettle is maintained between the upper warning liquid level line and the lower warning liquid level line.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 11, an acetic acid dehydration column rectification separation acetic acid and water reaction apparatus includes:
the liquid lifting sensing device 1 is arranged to send a signal to the first-stage processor 4 when the liquid level of the tower kettle rises to an upper warning liquid level line;
in the embodiment, the liquid level of the tower kettle is too high, and the liquid level exceeds the volatilizing pipe when serious, so that the resistance of kettle liquid circulation is increased, heat transfer is poor, the kettle temperature is reduced, and the operation is influenced;
the upper warning liquid level line is positioned below the actual warning liquid level line, so that the liquid level can be prevented from rising too fast to cross the actual warning liquid level line, and sufficient reaction time is reserved for the liquid discharge control device 8;
the liquid lifting sensing device 1 includes:
the first barrel 15 is slidably connected with a first guide plate 14, the first guide plate 14 is connected with a first floating plate 11 through a first connecting rod 13, the top of the first barrel 15 is connected with a first connector 16, and the first connector 16 is connected with the first-stage processor 4 through a first lead 18;
in a further embodiment, the first floating plate 11 is bowl-shaped, so that the surface area contacted with the liquid level is increased, the buoyancy borne by the first floating plate 11 is improved, the opening of the first floating plate 11 is upward, when the tower bottom liquid rises, the buoyancy borne by the first floating plate 11 is greater than the gravity of the first floating plate 11, and the first floating plate 11 floats upwards;
the infrared distance measuring device 2 is used for measuring the distance between the infrared distance measuring device and the liquid level of the tower kettle liquid;
the liquid-lowering sensing device 3 is arranged to send a signal to the first-stage processor 4 when the liquid level of the tower kettle is close to the lower warning liquid level line;
in a further embodiment, the liquid level of the kettle is lowered or emptied, so that the circulation amount of the kettle liquid passing through the reboiler is reduced, heat transfer is poor, light components cannot be steamed out, products at the top of the tower and the kettle are disqualified, and once the liquid level of the kettle is too low, the pump cannot be increased, equipment is worn out, and accidents are caused;
the lower warning liquid level line is positioned above the actual lower warning liquid level line, so that the liquid level can be prevented from falling too fast to cross the actual lower warning liquid level line, the loss is reduced, and sufficient reaction time is reserved for the liquid discharge control device 8;
the liquid-lowering sensing device 3 includes:
the second cylinder 35 is slidably connected with a second guide plate 34 in the second cylinder 35, the second guide plate 34 is connected with a second floating plate 31 through a second connecting rod 33, the top of the second cylinder 35 is connected with a second connector 38, the second connector 38 is connected with the first-stage processor 4 through a third wire 39, the first-stage processor 4 is connected with the second-stage processor 5 through a fourth wire 6, the second-stage processor 5 contains a database, and after receiving information, the second-stage processor 5 compares the database data, so that adjusted information is obtained and the stepping motor 81 is regulated;
in a further embodiment, the second floating plate 31 is bowl-shaped, so that the surface area contacted with the liquid level is increased, the buoyancy borne by the first floating plate 11 is improved, the opening of the second floating plate 31 is downward, the buoyancy borne by the second floating plate 31 is smaller than the gravity of the second floating plate 31 after the tower bottom liquid descends, and the second floating plate 31 moves downward;
in the embodiment, the first floating plate 11 is provided with a first liquid outlet hole 12, the second floating plate 31 is provided with a second liquid outlet hole 32, and the first liquid outlet hole 12 and the second liquid outlet hole 32 are both convenient for the flow of tower bottom liquid;
in a further embodiment, the first cylinder 15 and the second cylinder 35 are the same size, and the axis of the first cylinder 15 and the axis of the second cylinder 35 are on the same vertical line, and the first cylinder 15 is above the second cylinder 35;
the liquid discharge control device 8 is used for regulating and controlling the discharge rate of the tower kettle liquid;
the liquid discharge control device 8 includes:
the stepper motor 81, the stepper motor 81 is connected with the secondary processor 5 through the fifth lead 7, the rotating part of the stepper motor 81 is connected with the sealing plate 84, the fixed part of the stepper motor 81 is connected with the L plate 87, the L plate 87 is connected with the bottom of the dehydration tower, the bottom wall of the dehydration tower is penetrated and provided with the liquid outlet arc hole 85, and the sealing plate 84 can rotate along with the rotating part and seal the liquid outlet arc hole 85, so that the liquid outlet speed is regulated and controlled.
In a further embodiment, the center of the circle of the bottom plane of the sealing plate 84 coincides with the center of the liquid outlet arc hole 85, the area of the sealing plate 84 is larger than that of the liquid outlet arc hole 85, the sealing plate 84 can completely seal the liquid outlet arc hole 85, and the size of the liquid outlet arc hole 85 is regulated by rotating the sealing plate 84, so that the height of tower bottom liquid in the dehydrating tower is regulated;
in a further embodiment, the first guide plate 14 moves upwards along the axial direction of the first cylinder 15 along with the first floating plate 11 under the action of buoyancy, the first guide plate 14 contacts the first connector 16 and is communicated with a circuit, at the moment, the bottom of the first guide plate 14 and the upper warning water line are located at the same height, and the first wire 18 sequentially transmits signals communicated by the first connector 16 to the primary processor 4 and the secondary processor 5.
In a further embodiment, the infrared ranging device 2 comprises: the infrared ranging sensor 21, the infrared ranging sensor 21 is connected with the inner wall of the dehydration tower through a second connecting plate 22, and the infrared ranging sensor 21 is electrically connected with the first-stage processor 4 through a second lead 23.
The infrared ranging sensor 21 is a high temperature resistant infrared ranging sensor 21.
Referring to fig. 1 to 8, an acetic acid dehydration column rectifying separation acetic acid and water reaction device, the liquid-reducing induction device 3 further comprises: the second fixing plate 37, two sides of the second fixing plate 37 are respectively connected with the side surface of the second cylinder 35 and the inner wall of the dehydration tower, the second guide plate 34 moves downwards along the axial direction of the second cylinder 35 under the action of gravity, the second guide plate 34 contacts the second connector 38 and is communicated with a circuit, at the moment, the top of the second guide plate 34 and the lower warning water level line are located at the same height, and the third wire 39 sequentially transmits signals communicated by the second connector 38 to the primary processor 4 and the secondary processor 5.
The primary processor 4 is used for knowing the communication condition of the first connector 16 and the second connector 38, and if the first connector 16 and the second connector 38 are communicated, the primary processor 4 can transmit the information of the tower liquid height measured by the infrared ranging sensor 21 within 0.5s to the secondary processor 5;
in a further embodiment, when the sealing plate 84 is not adjusted, half of the liquid outlet arc hole 85 is blocked by the sealing plate 84, the sealing plate 84 can cover and open the liquid outlet arc hole 85 by rotating the sealing plate 84 in different directions, the sealing plate 84 rotates anticlockwise, the liquid outlet of the liquid outlet arc hole 85 is enlarged, the sealing plate 84 rotates clockwise, and the liquid outlet of the liquid outlet arc hole 85 is enlarged.
In a further embodiment, after the first connector 16 or the second connector 38 is connected, the primary processor 4 transmits the distance information measured by the infrared ranging sensor 21 in 0.5s to the secondary processor 5, the secondary processor 5 obtains the liquid level difference of the tower bottom liquid in 0.5s and adjusts the rotating amplitude of the stepper motor 81 accordingly, the larger the liquid level difference is, the larger the rotating amplitude of the stepper motor 81 rotating part with the sealing plate 84 is, so that the size of the liquid outlet arc hole 85 is adjusted pertinently according to the change condition of the liquid level of the tower bottom liquid.
In a further embodiment, after the secondary processor 5 receives the information communicated by the first connector 16, the stepper motor 81 rotates clockwise, the liquid outlet hole of the liquid outlet arc hole 85 becomes larger, the liquid outlet speed increases, after the secondary processor 5 receives the information communicated by the second connector 38, the stepper motor 81 rotates anticlockwise, the sealing plate 84 covers the liquid outlet arc hole 85, the liquid outlet hole of the liquid outlet arc hole 85 becomes smaller, and the liquid outlet speed decreases.
In the use process, the liquid level of the tower kettle continuously rises and approaches to the upper warning liquid level line, the buoyancy borne by the first floating plate 11 is larger than the gravity of the first floating plate, the first floating plate 11 sequentially carries the first connecting rod 13 and the first guide plate 14 to move upwards along the axial direction of the first cylinder 15, the first guide plate 14 contacts the first connector 16 and is communicated with the circuit of the first connector 16, the first-stage processor 4 receives the information communicated with the first connector 16 through the first lead 18, the first-stage processor 4 transmits the information of the liquid level of the tower kettle measured by the infrared ranging device 2 in 0.5s to the second-stage processor 5, the second-stage processor 5 obtains the liquid level difference of the tower kettle liquid in 0.5s and regulates and controls the rotation amplitude of the stepping motor 81 accordingly, the measured liquid level difference is larger, the bigger the anticlockwise rotation angle of the stepping motor 81 is, the smaller the liquid outlet arc hole 85 is covered by the sealing plate 84, the bigger the liquid outlet of the liquid outlet arc hole 85 is, the liquid outlet amount of the liquid outlet arc hole 85 is increased in unit time, so that the tower bottom liquid increased in unit time of the dehydrating tower is balanced with the tower bottom liquid flowing out in unit time, and the upper warning liquid level line has a small distance from the actual warning liquid level line, so that the liquid level of the tower bottom liquid can not exceed the actual warning liquid level line in the operation process of the liquid discharge control device 8, and after the worker finds out, part of the tower bottom liquid can be discharged through the regulating and controlling liquid outlet pipe 86, so that the tower bottom liquid in the dehydrating tower is maintained at a proper height;
the liquid level of the tower kettle continuously descends and approaches to the lower warning liquid level line, the buoyancy borne by the second floating plate 31 is smaller than the gravity of the second floating plate, the second floating plate 31 sequentially carries the second connecting rod 33 and the second guide plate 34 to move downwards along the axial direction of the second cylinder 35, the second guide plate 34 contacts the second connector 38 and is communicated with the circuit of the second connector 38, the first-stage processor 4 receives the information communicated with the first connector 16 through the third lead 39, the first-stage processor 4 transmits the information of the liquid level of the tower kettle measured by the infrared ranging device 2 in 0.5s to the second-stage processor 5, the second-stage processor 5 obtains the liquid level difference of the tower kettle in 0.5s and regulates the rotation amplitude of the stepping motor 81 accordingly, the measured liquid level difference is larger, the greater the angle that step motor 81 rotated clockwise, the more the play liquid arc hole 85 receives the cover of closing plate 84, the liquid outlet of play liquid arc hole 85 diminishes, in the unit time, go out the liquid volume of play liquid arc hole 85 and reduce, thereby make the tower cauldron liquid that increases in the dehydration tower unit time keep balanced with the tower cauldron liquid that flows in the unit time, and the warning liquid level has a short distance under with in fact, can guarantee flowing back controlling means 8 in the in-process of operation, the tower cauldron liquid level can not cross in fact and guard the liquid level under, after the staff found, can discharge partial tower cauldron liquid through regulating and controlling drain pipe 86, make the tower cauldron liquid in the dehydration tower maintain at a suitable height.
In summary, compared with the prior art, the method has the following beneficial effects: the motion trend of the tower kettle liquid in the dehydrating tower is sensed through the liquid lifting sensing device 1 and the liquid falling sensing device 3, when the tower kettle liquid is close to the upper warning liquid level line and the lower warning liquid level line, the circuit is communicated, so that the primary processor 4 receives the height data of the tower kettle liquid measured by the infrared ranging sensor 21 and transmits the height data to the secondary processor 5, the secondary processor 5 can regulate and control the rotation amplitude of the motor by measuring the height difference of the tower kettle liquid in 0.5s, the size of the liquid outlet is controlled, the function of only regulating and controlling the height of the tower kettle liquid is achieved, the detection is not needed, time and labor are saved, the condition that a worker is difficult to timely find the change of the liquid level of the tower kettle liquid is avoided, and the loss is avoided.
It is noted that relational terms such as first and second, and the like are 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 may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. The utility model provides an acetic acid dehydration tower rectification separation acetic acid and water reaction unit which characterized in that: comprising the following steps:
the liquid lifting sensing device (1) is arranged to send a signal to the first-stage processor (4) when the liquid level of the tower kettle is close to the upper warning liquid level line;
the liquid lifting induction device (1) comprises:
the device comprises a first cylinder body (15), wherein a first guide plate (14) is connected in a sliding manner in the first cylinder body (15), the first guide plate (14) is connected with a first floating plate (11) through a first connecting rod (13), a first connector (16) is connected to the top of the first cylinder body (15), and the first connector (16) is connected with a first-stage processor (4) through a first lead (18);
the infrared distance measuring device (2) is used for measuring the distance between the infrared distance measuring device and the liquid level of the tower kettle;
the liquid-falling sensing device (3) is arranged to send a signal to the first-stage processor (4) when the liquid level of the tower kettle is close to the lower warning liquid level line;
the liquid-dropping sensing device (3) comprises:
the second barrel (35), sliding connection has second baffle (34) in second barrel (35), second baffle (34) are connected with second kickboard (31) through second connecting rod (33), the top of second barrel (35) is connected with second connector (38), second connector (38) are connected with one-level treater (4) through third wire (39), one-level treater (4) are connected with two-level treater (5) through fourth wire (6);
the liquid discharge control device (8) is used for regulating and controlling the discharge rate of the tower kettle liquid;
the liquid discharge control device (8) comprises:
the step motor (81), step motor (81) are connected with the secondary processor (5) through fifth wire (7), the rotation portion of step motor (81) is connected with closing plate (84), and the fixed part of step motor (81) is connected with L board (87), L board (87) are connected with the dehydration tower bottom, and the dehydration tower diapire runs through and has offered out liquid arc hole (85), closing plate (84) can rotate and seal out liquid arc hole (85) along with rotation portion to regulate and control liquid rate.
2. The acetic acid dehydration column rectification separation acetic acid and water reaction apparatus according to claim 1, wherein: the liquid lifting induction device (1) further comprises: the first fixing plate (17), first fixing plate (17) are connected with first barrel (15), one side that first fixing plate (17) kept away from first barrel (15) axis is connected with the dehydration tower inner wall.
3. The acetic acid dehydration column rectification separation acetic acid and water reaction apparatus according to claim 1, wherein: the first guide plate (14) moves upwards along the axis direction of the first cylinder body (15) along with the first floating plate (11) under the action of buoyancy, the first guide plate (14) contacts the first connector (16) and is communicated with a circuit, at the moment, the bottom of the first guide plate (14) and an upper warning water level line are located at the same height, and the first lead (18) sequentially transmits signals communicated with the first connector (16) to the primary processor (4) and the secondary processor (5).
4. The acetic acid dehydration column rectification separation acetic acid and water reaction apparatus according to claim 1, wherein: the infrared ranging device (2) comprises: the infrared ranging sensor (21), infrared ranging sensor (21) are connected with the dehydration tower inner wall through second connecting plate (22), infrared ranging sensor (21) are connected with one-level processor (4) through second wire (23) electric connection.
5. The acetic acid dehydration column rectification separation acetic acid and water reaction apparatus according to claim 4, wherein: the liquid-dropping sensing device (3) further comprises: the second fixed plate (37), the both sides of second fixed plate (37) are connected with the side of second barrel (35) respectively, the inner wall of dehydration tower, second baffle (34) move down along the axis direction of second barrel (35) under the action of gravity, second baffle (34) contact second connector (38) and communication circuit, at this moment second baffle (34) top and lower warning water line are located same height, signal that third wire (39) will second connector (38) communicate is transmitted primary processor (4), secondary processor (5) in proper order.
6. The acetic acid dehydration column rectification separation acetic acid and water reaction apparatus according to claim 1, wherein: when the sealing plate (84) is not adjusted, a half of the liquid outlet arc hole (85) is blocked by the sealing plate (84).
7. The acetic acid dehydration column rectification separation acetic acid and water reaction apparatus according to claim 6, wherein: after the first connector (16) or the second connector (38) are communicated, the primary processor (4) transmits the distance information measured by the infrared ranging sensor (21) in 0.5s to the secondary processor (5), and the secondary processor (5) obtains the liquid level difference of tower kettle liquid in 0.5s and regulates and controls the rotating amplitude of the stepping motor (81) accordingly.
8. The acetic acid dehydration column rectification separation acetic acid and water reaction apparatus according to claim 7, wherein: the secondary processor (5) receives the information communicated with the first connector (16), the stepping motor (81) rotates clockwise, and the secondary processor (5) receives the information communicated with the second connector (38), and the stepping motor (81) rotates anticlockwise.
CN202311397399.7A 2023-10-26 2023-10-26 Acetic acid dehydration tower rectifying separation acetic acid and water reaction unit Pending CN117379816A (en)

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CN202311397399.7A CN117379816A (en) 2023-10-26 2023-10-26 Acetic acid dehydration tower rectifying separation acetic acid and water reaction unit

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CN202311397399.7A CN117379816A (en) 2023-10-26 2023-10-26 Acetic acid dehydration tower rectifying separation acetic acid and water reaction unit

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CN117379816A true CN117379816A (en) 2024-01-12

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