CN220513449U

CN220513449U - Distillation tower for methyl methacrylate production

Info

Publication number: CN220513449U
Application number: CN202321494330.1U
Authority: CN
Inventors: 董文天; 王稳; 王强; 王莹; 居利; 张洪娟; 沈伟
Original assignee: Suzhou Double Elephant Optical Materials Co ltd
Current assignee: Suzhou Double Elephant Optical Materials Co ltd
Priority date: 2023-06-13
Filing date: 2023-06-13
Publication date: 2024-02-23
Anticipated expiration: 2033-06-13

Abstract

The utility model discloses a distillation tower for methyl methacrylate production, which comprises a box body and tower bodies arranged at the left side and the right side of the top of the box body, wherein the tower bodies are methyl methacrylate gas generation spaces; the bottom of the box body is provided with a valve, the valve can discharge the purified waste liquid in the box body, a heater is arranged in the box body, and the heater is electrified to heat the methyl methacrylate solution; the distillation tower for methyl methacrylate production also comprises an automatic adding mechanism and a pressure regulating mechanism; the automatic adding mechanism is arranged on the right side wall of the box body, and methyl methacrylate solution to be distilled is introduced through a pipeline; the pressure regulating mechanism is arranged at the top of the tower body. The automatic addition of the methyl methacrylate solution is realized, the sudden drop of the temperature of the methyl methacrylate solution is not caused, the distillation efficiency of the methyl methacrylate solution is high, the air outlet pressure is adaptively changed according to the concentration of the methyl methacrylate, and the purification effect of the methyl methacrylate is better.

Description

Distillation tower for methyl methacrylate production

Technical Field

The utility model belongs to the technical field of methyl methacrylate production, and particularly relates to a distillation tower for methyl methacrylate production.

Background

Methyl Methacrylate (MMA), also known as methyl methacrylate, is an organic compound with a chemical formula of C5H8O2, is colorless liquid, is slightly soluble in water, is soluble in most organic solvents such as ethanol, and is mainly used as a monomer of organic glass, and is also used for manufacturing other resins, plastics, coatings, adhesives, lubricants, impregnating compounds for wood and cork, paper polish and the like. Distillation is an indispensable process in the process of producing methyl methacrylate, and the methyl methacrylate is purified from the mixed solution;

in order to slow down the rising speed of methyl methacrylate gas, the utility model patent of application number 2015106805901 discloses a methyl methacrylate production is with distillation column, including feed inlet, tower body, (mixing) shaft, stirring heating rod, baffle, double-pipeline, condenser, pressure control device and discharge gate, its characterized in that: the feed inlet is located the upper right corner of tower body, the (mixing) shaft is located the tower body centre, and the motor is connected to one end, and the other end is connected with the heating stirring rod, the baffle is located the first half of tower body, the double pipeline is connected with the tower body top. The utility model is characterized in that the methyl methacrylate solution is heated evenly by stirring, but the methyl methacrylate solution is gradually reduced along with the continuous evaporation and rising of the methyl methacrylate, the methyl methacrylate solution cannot be automatically supplemented along with the evaporation amount of the methyl methacrylate, the volume of the methyl methacrylate solution is large, the temperature in a tower body can be reduced, the heating time is long, the distillation efficiency of the methyl methacrylate solution is low, and in addition, when the methyl methacrylate gas is discharged, self-polymerization occurs due to the fact that the methyl methacrylate is heated too much, the methyl methacrylate gas is discharged at low pressure in a distillation tower in order to control the inner diameter of an air outlet hole, and the methyl methacrylate purification effect is not good because the air outlet pressure cannot be adaptively changed according to the concentration of the methyl methacrylate although the methyl methacrylate gas can be discharged at low pressure.

Disclosure of Invention

The utility model provides a distillation tower for methyl methacrylate production, which aims to solve the problems that a methyl methacrylate solution cannot be automatically added into the distillation tower at present and the air outlet pressure cannot be adaptively changed according to the methyl methacrylate concentration.

The utility model is realized in such a way that the distillation tower for methyl methacrylate production comprises a box body and tower bodies arranged at the left side and the right side of the top of the box body, wherein the tower bodies are methyl methacrylate gas generation spaces; the bottom of the box body is provided with a valve, the valve can discharge the purified waste liquid in the box body, a heater is arranged in the box body, and the heater is electrified to heat the methyl methacrylate solution;

the distillation tower for methyl methacrylate production also comprises an automatic adding mechanism and a pressure regulating mechanism; the automatic adding mechanism is arranged on the right side wall of the box body, and methyl methacrylate solution to be distilled is introduced through a pipeline; the pressure regulating mechanism is arranged at the top of the tower body and is connected with the condenser through a pipeline, so that methyl methacrylate can be converted into liquid after being cooled from a gaseous state;

the automatic adding mechanism comprises a valve body, an elbow, a liquid valve, a rotating shaft, a valve core, a runner, a swing rod, a floating ball and a limiting block; the valve body is arranged on the right side wall of the box body, and an opening is formed in the left side of the valve body; one end of the elbow is arranged on the right side wall of the valve body, and the elbow corresponds to the left opening position of the valve body; the liquid valve is arranged at the other end of the elbow, the liquid valve is used for introducing methyl methacrylate solution to be distilled through a pipeline, and the methyl methacrylate solution can be thoroughly blocked from entering the box body by closing the liquid valve; the rotating shaft can rotate around the axis of the rotating shaft through a bearing and is arranged at the center of the inner cavity of the valve body; the valve core is arranged on the outer wall of the rotating shaft, the valve core can rotate in the valve body, the valve core can separate the elbow from the inner cavity of the valve body, the outer wall of the valve core is provided with a flow channel corresponding to the elbow, and the left opening of the valve body can be communicated with the elbow; one end of the swing rod is arranged at the left end of the rotating shaft; the floating ball is arranged at the other end of the swing rod, and can float on the liquid level of the methyl methacrylate solution, so that the purpose of driving the swing rod to swing is achieved; the number of the limiting blocks is two, and the limiting blocks are respectively arranged at the upper end and the lower end of the front side of the left side wall of the valve body and limit the up-and-down swing of the swing rod;

the swing rod and the floating ball gravity drive the rotating shaft to drive the valve core to rotate clockwise, the floating ball can drive the valve core to rotate anticlockwise by utilizing the self buoyancy, and the methyl methacrylate solution is automatically added by changing the position of the flow channel.

Further, the pressure regulating mechanism comprises a cylinder body, a joint, a piston, a support column, a sealing ring, a support rod, a supporting plate, a counterweight disc and a positioning assembly, wherein the cylinder body is vertically arranged at the top of the tower body and is communicated with the inner cavity of the tower body; the joint is connected with the condenser through a pipeline; the piston is inserted into the bottom end of the inner cavity of the cylinder body, so that the bottom of the cylinder body can be closed; the support column is arranged at the center of the top of the piston; the sealing ring is arranged at the top end of the outer wall of the support column to prevent gas from drifting out of the gap; the support rod is vertically arranged at the center of the top of the support column, and clamping grooves are formed in the support rod at equal intervals from top to bottom; the supporting plate is fixedly connected to the middle part of the outer wall of the supporting rod; the balance weight disc is stacked and sleeved on the outer wall of the supporting rod, the pressure of the piston is increased or reduced, and the gas discharge pressure is adjusted; the positioning component is sleeved on the outer wall of the supporting rod and matched with the clamping groove to position the counterweight disc;

the piston pressure is changed by adjusting the number of the weight plates on the supporting plate, so that the adjustment of the discharge pressure of the methyl methacrylate gas is realized.

Furthermore, the outer wall of the supporting rod is rectangular, and the stability of placing the counterweight disc is improved.

The positioning assembly comprises a sleeve, an inserted link, a spring, a push rod, a button and a push plate, wherein the sleeve is sleeved on the outer wall of the support rod and is hollow; the number of the inserted rods is two, the inserted rods are respectively inserted into the left side and the right side of the inner cavity of the sleeve, and the outer sides of the inserted rods extend out of the outer wall of the sleeve; the spring is sleeved on the outer wall of the inserted link and can push the push rod to move inwards; the push rod is arranged on the outer wall of the inserted link, and the inner side of the inserted link is pushed by the spring to be inserted into the inner cavity of the clamping groove, so that the sleeve is positioned; the button is inserted in the center of the front side of the sleeve; the push plate is arranged at the rear end of the button and is contacted with the push rod.

Furthermore, the inner side surface is arc-shaped, so that the clamping groove aligned with the supporting rod is convenient to insert.

Furthermore, the contact surface of the push rod and the push plate is an inclined surface, and when the push plate is pushed backwards, the push rod is extruded to move outwards, so that the aim of adjusting the gas discharge pressure is fulfilled.

The utility model has the following beneficial effects:

the gravity swing rod through the swing rod and the floating block can swing downwards, the floating block can swing upwards, so that the valve core can rotate according to the liquid level of the methyl methacrylate solution in the box body, when the floating block descends based on the level of the swing rod, the flow channel moves to correspond to the elbow, the methyl methacrylate solution can pass through the left opening of the valve body to enter the box body, when the floating block ascends, the flow channel is staggered with the elbow, the valve core seals the elbow, the automatic addition of the methyl methacrylate solution in the box body is realized, the temperature dip of the methyl methacrylate solution cannot be caused, and the distillation efficiency of the methyl methacrylate solution is high;

through pushing the push pedal backward, push pedal and push rod interlock can make the inserted bar outside remove the draw-in groove on the bracing piece, remove telescopic location, the sleeve can be taken off from the bracing piece, adjust the quantity of balance weight dish, change the pressure of balance weight dish to the piston, during the sleeve cover is on the bracing piece, the spring utilizes self elasticity can promote the inserted bar to the inside side move insert in the draw-in groove of corresponding position, utilize the sleeve to press from both sides the balance weight dish tight on the bracing piece, according to methyl methacrylate concentration self-adaptation change pressure of giving vent to anger, methyl methacrylate purification effect is better.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a top cross-sectional view of the automatic adding mechanism of the present utility model;

FIG. 3 is a left side view of the automatic adding mechanism of the present utility model;

FIG. 4 is a schematic diagram of a pressure regulating mechanism according to the present utility model;

FIG. 5 is a front cross-sectional view of the pressure regulating mechanism of the present utility model;

fig. 6 is a top cross-sectional view of the positioning assembly of the present utility model.

In the figure: 1. a case; 2. a tower body; 3. an automatic adding mechanism; 4. a pressure regulating mechanism; 31. a valve body; 32. an elbow; 33. a liquid valve; 34. a rotating shaft; 35. a valve core; 36. a flow passage; 37. swing rod; 38. a floating ball; 39. a limiting block; 41. a cylinder; 42. a joint; 43. a piston; 44. a support column; 45. a seal ring; 46. a support rod; 47. a supporting plate; 48. a weight plate; 49. a positioning assembly; 491. a sleeve; 492. a rod; 493. a spring; 494. a push rod; 495. a button; 496. a push plate.

Description of the embodiments

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1 to 6, the utility model relates to a distillation column for methyl methacrylate production, which comprises a box body 1 and a column body 2 arranged at the left side and the right side of the top of the box body 1, wherein the column body 2 is a methyl methacrylate gas generation space, a valve is arranged at the bottom of the box body 1, the valve can discharge waste liquid purified in the box body 1, a heater is arranged in the box body, the heater is electrified to heat methyl methacrylate solution, the distillation column for methyl methacrylate production further comprises an automatic adding mechanism 3 and a pressure regulating mechanism 4, the automatic adding mechanism 3 is arranged at the right side wall of the box body 1, and methyl methacrylate solution to be distilled is introduced through a pipeline; the pressure regulating mechanism 4 is arranged at the top of the tower body 2 and is connected with the condenser through a pipeline, so that methyl methacrylate can be converted into liquid after being cooled from a gaseous state;

the automatic adding mechanism 3 comprises a valve body 31, an elbow 32, a liquid valve 33, a rotating shaft 34, a valve core 35, a flow channel 36, a swinging rod 37, a floating ball 38 and a limiting block 39, wherein the valve body 31 is arranged on the right side wall of the box body 1, and an opening is formed in the left side of the valve body 31; one end of the elbow 32 is arranged on the right side wall of the valve body 31, and the elbow 32 corresponds to the left opening position of the valve body 31; a liquid valve 33 is arranged at the other end of the elbow 32, the liquid valve 33 introduces methyl methacrylate solution to be distilled through a pipeline, and the liquid valve 33 is closed to thoroughly block the methyl methacrylate solution from entering the tank body 1; the rotating shaft 34 is rotatably arranged at the center of the inner cavity of the valve body 31 around the axis thereof through a bearing; the valve core 35 is mounted on the outer wall of the rotating shaft 34, the valve core 35 can rotate in the valve body 31, the valve core 35 can block the elbow 32 from the inner cavity of the valve body 31, the outer wall of the valve core 35 is provided with a flow channel 36 corresponding to the elbow 32 in position, and the left opening of the valve body 31 can be communicated with the elbow 32; one end of a swing rod 37 is arranged at the left end of the rotating shaft 34; the floating ball 38 is arranged at the other end of the swing rod 37, and the floating ball 38 can float on the liquid level of the methyl methacrylate solution, so that the purpose of driving the swing rod 37 to swing is achieved; the number of the limiting blocks 39 is two, and the limiting blocks are respectively arranged at the upper end and the lower end of the front side of the left side wall of the valve body 31 and limit the up-and-down swing of the swing rod 37.

Specifically, the pressure regulating mechanism 4 includes a cylinder 41, a joint 42, a piston 43, a support column 44, a sealing ring 45, a support rod 46, a support plate 47, a counterweight disc 48 and a positioning assembly 49, the cylinder 41 is vertically installed at the top of the tower 2, and the cylinder 41 is communicated with an inner cavity of the tower 2; the joint 42 is installed in the middle of the outer wall of the cylinder 41, and the joint 42 is connected with the condenser through a pipeline; the piston 43 can be inserted into the bottom end of the inner cavity of the cylinder 41 in a vertically movable manner, so that the bottom of the cylinder 41 can be closed; the support column 44 is vertically installed at the top center of the piston 43; the sealing ring 45 is arranged at the top end of the outer wall of the supporting column 44 to prevent methyl methacrylate gas from drifting out from a gap between the cylinder 41 and the supporting rod 46; the supporting rods 46 are vertically arranged at the center of the top of the supporting columns 44, the tops of the supporting rods 46 penetrate through the upper surface of the cylinder 41, and clamping grooves are formed in the left side and the right side of the supporting rods 46 from top to bottom at equal intervals; the supporting plate 47 is fixedly connected to the middle part of the outer wall of the supporting rod 46; the number of the weight plates 48 is a plurality, the weight plates 48 are stacked from top to bottom and sleeved on the outer wall of the supporting rod 46, the supporting plate 47 plays a role in supporting the weight plates 48, the weight plates 48 are increased or decreased, the pressure of the piston 43 is increased or decreased, and the methyl methacrylate gas discharge pressure is regulated; the positioning component 49 is sleeved on the outer wall of the supporting rod 46, and the positioning component 49 is matched with the clamping groove to position the counterweight disc 48.

Specifically, the outer wall of the supporting rod 46 is rectangular, so as to improve the stability of the weight plate 48 placed on the supporting plate 47.

Specifically, the positioning assembly 49 includes a sleeve 491, an insert rod 492, a spring 493, a push rod 494, a button 495, and a push plate 496, wherein the sleeve 491 is sleeved on the outer wall of the support rod 46, and the sleeve 491 is hollow; the number of the inserting rods 492 is two, the inserting rods 492 are respectively inserted into the left side and the right side of the inner cavity of the sleeve 491 in a left-right opposite manner, the outer sides of the inserting rods 492 extend out of the outer wall of the sleeve 491, and the inner side surfaces of the inserting rods 492 are arc-shaped, so that the inserting rods 492 can be conveniently inserted in alignment with the clamping grooves on the supporting rods 46; the spring 493 is sleeved on the outer wall of the plunger 492, and the push rod 494 can be pushed to move inwards by the elasticity of the spring 493; the push rod 494 is installed on the outer wall of the insert rod 492, the spring 493 pushes the inner side of the insert rod 492 to be inserted into the inner cavity of the clamping groove through the push rod 494 under the action of self elasticity, and the sleeve 491 is positioned; a push button 495 is slidably inserted in a front center position of the sleeve 491; a push plate 496 is mounted at the rear end of the push button 495, the push plate 496 and push rod 494 being in contact with each other.

Specifically, the contact surface between the push rod 494 and the push plate 456 is an inclined surface, and when the push plate 496 is pushed backward, the push plate 496 presses the push rod 494 to move outward.

The working principle of the utility model is as follows:

when methyl methacrylate solution needs to be automatically added into the box body 1, the methyl methacrylate solution is introduced into the elbow 32 through a pipeline, the floating ball 38 and the swinging rod 37 can enable the swinging rod 37 to drive the rotating shaft 34 to rotate under the action of self gravity, meanwhile, the valve core 35 drives the flow channel 36 to rotate, the elbow 32 is communicated with the left opening of the valve body 31 through the flow channel 36, the methyl methacrylate solution passes through the valve body 31 and the opening to flow into the box body 1, when the swinging rod 37 contacts with the bottom limiting block 39, the flow channel 36 controls the flow rate of the elbow 32 to be maximum, the methyl methacrylate solution can be quickly introduced into the box body 1, the floating ball 38 floats upwards along with the liquid level along with the continuous rising of the methyl methacrylate solution level in the box body 1, the swinging rod 37 swings upwards, the valve core 35 drives the flow channel 36 to reversely rotate until the elbow 37 keeps horizontal, the flow channel 36 is staggered with the elbow 32, the methyl methacrylate solution in the box body 1 is fully filled with the methyl methacrylate solution, the methyl methacrylate solution in the box body 1 is heated by using the heater in the box body 1, the methyl methacrylate solution is evaporated to form the methyl methacrylate solution level, the methyl methacrylate solution is automatically cooled down to form the upper swing channel 38, and the methyl methacrylate solution is automatically cooled down in the box body 1, the swinging rod 32 is opened, the methyl methacrylate solution is automatically cooled down, and the methyl methacrylate solution in the elbow 32 is cooled down;

step two, methyl methacrylate gas rises along the tower body 2, and along with the increase of the methyl methacrylate gas, the pressure of the methyl methacrylate gas in the tower body 2 increases until the methyl methacrylate gas pressure can push the piston 43 to move upwards, the supporting column 44, the supporting rod 46, the counterweight disc 48 and the like move upwards along with the piston 43 until the rising height of the piston 43 can communicate the joint 42 with the tower body 2, the gas is discharged into the condenser along the joint 42, the methyl methacrylate gas forms a liquid state after being cooled, and the liquid methyl methacrylate can be collected, so that the purification of the methyl methacrylate is realized;

and thirdly, when the discharge pressure of methyl methacrylate gas in the tower body 2 needs to be regulated, the push plate 496 is pushed backwards, under the action of the inclined surfaces of the push plate 496 and the push rod 494, the push plate 496 can push the push rod 494 to move outwards, so that the insert rod 492 moves outwards to move out of the clamping groove of the support rod 46, the positioning of the sleeve 491 is released, after the sleeve 491 is removed from the support rod 46, the number of the weight plates 48 can be increased or reduced, the weight plates 48 increase or reduce the gravity of the support plate 47, the increase or decrease of the discharge pressure of methyl methacrylate gas is realized, the sleeve 491 is sleeved on the support rod 46 again, the spring 493 pushes the rod insert rod 492 to move inwards under the action of self elasticity, the insert rod 492 is inserted into the clamping groove at the corresponding position, the overlapped weight plates 48 on the support rod 46 are fixed, and the normal up-down movement of the piston 43 is prevented from being influenced by shaking of the weight plates 48, and the release pressure applied to the methyl methacrylate gas is stable.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The utility model provides a methyl methacrylate production is with distillation column, includes box (1) and installs tower body (2) in the left and right sides at box (1) top, the bottom of box (1) is provided with the valve, and inside is provided with the heater, its characterized in that, methyl methacrylate production is with distillation column still includes:

the automatic adding mechanism (3) is arranged on the right side wall of the box body (1) and is used for introducing a methyl methacrylate solution to be distilled through a pipeline;

the pressure regulating mechanism (4) is arranged at the top of the tower body (2) and is connected with the condenser through a pipeline, so that methyl methacrylate can be converted into liquid after being cooled from a gaseous state;

the automatic adding mechanism (3) comprises:

the valve body (31) is arranged on the right side wall of the box body (1), and an opening is formed in the left side of the valve body (31);

one end of the elbow (32) is arranged on the right side wall of the valve body (31), and the elbow (32) corresponds to the left opening position of the valve body (31);

a liquid valve (33) installed at the other end of the elbow (32), and the liquid valve (33) introduces the methyl methacrylate solution to be distilled through a pipeline;

the rotating shaft (34) is rotatably arranged at the center of the inner cavity of the valve body (31) around the axis of the rotating shaft through a bearing;

the valve core (35) is arranged on the outer wall of the rotating shaft (34), the valve core (35) can rotate in the valve body (31), the valve core (35) can block the elbow (32) from the inner cavity of the valve body (31), a flow channel (36) corresponding to the elbow (32) in position is arranged on the outer wall of the valve core (35), and the left opening of the valve body (31) can be communicated with the elbow (32);

one end of the swing rod (37) is arranged at the left end of the rotating shaft (34);

the floating ball (38) is arranged at the other end of the swing rod (37);

the number of the limiting blocks (39) is two, and the limiting blocks are respectively arranged at the upper end and the lower end of the front side of the left side wall of the valve body (31) and limit the up-and-down swing of the swing rod (37).

2. The distillation column for methyl methacrylate production as recited in claim 1, wherein the pressure regulating mechanism (4) comprises:

the cylinder body (41) is vertically arranged at the top of the tower body (2), and the cylinder body (41) is communicated with the inner cavity of the tower body (2);

the joint (42) is arranged in the middle of the outer wall of the cylinder body (41), and the joint (42) is connected with the condenser through a pipeline;

the piston (43) can be inserted into the bottom end of the inner cavity of the cylinder body (41) in a vertically movable manner;

a support column (44) vertically installed at a top center position of the piston (43);

the sealing ring (45) is arranged at the top end of the outer wall of the supporting column (44);

the supporting rods (46) are vertically arranged at the center of the top of the supporting columns (44), the tops of the supporting rods (46) penetrate through the upper surface of the cylinder body (41), and clamping grooves are formed in the left side and the right side of each supporting rod (46) from top to bottom at equal intervals;

the supporting plate (47) is fixedly connected to the middle part of the outer wall of the supporting rod (46);

the counterweight plates (48) are stacked from top to bottom and sleeved on the outer wall of the supporting rod (46), and the supporting plates (47) play a role in supporting the counterweight plates (48);

the positioning component (49) is sleeved on the outer wall of the supporting rod (46), and the positioning component (49) is matched with the clamping groove to position the counterweight disc (48).

3. The distillation column for producing methyl methacrylate according to claim 2, wherein the outer wall of the support rod (46) is rectangular in shape.

4. A distillation column for the production of methyl methacrylate according to claim 3, wherein said positioning assembly (49) comprises:

a sleeve (491) sleeved on the outer wall of the supporting rod (46), wherein the sleeve (491) is hollow;

the number of the inserting rods (492) is two, the inserting rods are respectively inserted into the left side and the right side of the inner cavity of the sleeve (491) in a left-right opposite manner, and the outer sides of the inserting rods (492) extend out of the outer wall of the sleeve (491);

a spring (493) sleeved on the outer wall of the inserted link (492);

the push rod (494) is arranged on the outer wall of the insert rod (492), the spring (493) pushes the inner side of the insert rod (492) to be inserted into the inner cavity of the clamping groove through the push rod (494) under the action of self elasticity, and the sleeve (491) is positioned;

a push button (495) slidably inserted in a front center position of the sleeve (491);

a push plate (496) mounted at a rear end of the push button (495), the push plate (496) being in contact with the push rod (494).

5. The distillation column for producing methyl methacrylate ester as recited in claim 4, wherein the contact surface of the push rod (494) with the push plate (496) is an inclined surface.