CN210190253U - Production system of MMA monomer - Google Patents
Production system of MMA monomer Download PDFInfo
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- CN210190253U CN210190253U CN201822140696.4U CN201822140696U CN210190253U CN 210190253 U CN210190253 U CN 210190253U CN 201822140696 U CN201822140696 U CN 201822140696U CN 210190253 U CN210190253 U CN 210190253U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The utility model discloses a production system of MMA monomers, which comprises a heating system and a cooling system; the heating system comprises a first heating pipe, a second heating pipe and a third heating pipe which are connected in sequence, wherein screws are arranged in the first heating pipe, the second heating pipe and the third heating pipe respectively, and the first heating pipe, the second heating pipe and the third heating pipe are provided with heating devices respectively; the front end of the first heating pipe is provided with a feeding hole; the cooling system comprises a water-cooling branch pipe, a water-cooling main pipe and a liquid nitrogen cooling mechanism which are sequentially connected. Adopt this embodiment, can make the acrylic granule after smashing heat in proper order in first heating pipe, second heating pipe and the third heating pipe in heating system to make the gaseous of splitting out appear under the propelling movement of screw rod and stirring, after the segmentation got into each outlet duct, get into cooling system and cool off, accomplish the splitting of inferior gram force board automatically, the gaseous cooling and the storage of MMA, it is efficient, energy-concerving and environment-protective.
Description
Technical Field
The utility model relates to a MMA monomer production field especially relates to a free production system of MMA.
Background
Methyl methacrylate is an organic compound, also known as MMA, abbreviated as methylmethacrylate. Is an important chemical raw material, and is a monomer for producing transparent plastic polymethyl methacrylate (polymethyl methacrylate, PMMA). MMA can be cracked out by heating the acrylic plate used for producing the bathtub to a certain temperature, the waste acrylic plate is recovered, heated and cracked, and the main cracked product MMA is recovered and stored, so that the method is an effective method for recycling the acrylic plate.
The existing acrylic plate heating mainly uses a boiler, the acrylic plate is placed in the boiler for heating, and cracked gas is collected at the top of the boiler. The disadvantages of using this method are: 1. the heat preservation of the boiler is poor, and a large amount of energy is consumed in the heating process. 2. The acrylic plates in the boiler are heated unevenly, the temperature of the peripheral acrylic plates is too high, the central acrylic plates do not reach the cracking and evaporating temperature, and the cracking efficiency and the recovery quality are influenced. 3. The heated slag needs to be cleaned by opening a cover of the boiler, and the MMA gas has irritation, so that the health of operators is affected.
Disclosure of Invention
The utility model aims to solve the technical problem that a free production system of MMA is provided, can accomplish the schizolysis of ya keli board automatically, the gaseous cooling of MMA and store, efficient, energy-concerving and environment-protective.
In order to solve the technical problem, the utility model provides a production system of MMA monomers, which comprises a heating system and a cooling system; the heating system comprises a first heating pipe, a second heating pipe and a third heating pipe which are connected in sequence, wherein screws are arranged in the first heating pipe, the second heating pipe and the third heating pipe respectively, and the first heating pipe, the second heating pipe and the third heating pipe are provided with heating devices respectively; the front end of the first heating pipe is provided with a feeding hole, the first heating pipe is provided with a first air outlet pipe, different positions on the second heating pipe are provided with second air outlet pipes, different positions on the third heating pipe are provided with third air outlet pipes, the second heating pipe is connected with the third heating pipe through a vertically arranged vent pipe, the second heating pipe is connected with the side surface of the vent pipe, the third heating pipe is connected with the lower end of the vent pipe, and the upper end of the vent pipe is connected with a fourth air outlet pipe; cooling system is divided pipe, water-cooling house steward and liquid nitrogen cooling mechanism including the water-cooling that connects gradually, the water-cooling is divided the pipe and is used for cooling liquefaction with MMA monomer steam, the water-cooling house steward divides the MMA monomer after the liquefaction of pipe to collect the cooling with the water-cooling, liquid nitrogen cooling mechanism is used for cooling the MMA monomer after the water-cooling house steward cooling to predetermined temperature to store it.
As the improvement of above-mentioned scheme, the water-cooling is in charge of and is included first water-cooling casing and gas-liquid circulation and be in charge of, water main includes second water-cooling casing and gas-liquid circulation house steward, the gas-liquid circulation is in charge of and is located first water-cooling casing, the gas-liquid circulation house steward is located in the second water-cooling casing, all be equipped with the coolant liquid in first water-cooling casing and the second water-cooling casing, the coolant liquid lets in and cools off in the water-cooling tower.
As an improvement of the above scheme, the liquid nitrogen cooling mechanism comprises a liquid nitrogen tank and a liquid nitrogen production device, wherein the liquid nitrogen tank is provided with an MMA monomer accommodating cavity and a liquid nitrogen accommodating cavity arranged around the MMA monomer accommodating cavity; the liquid nitrogen production device is used for supplying liquid nitrogen to the liquid nitrogen containing cavity.
As an improvement of the above scheme, the first heating pipe and the second heating pipe, and the second heating pipe and the third heating pipe are arranged perpendicular to each other.
As an improvement of the above scheme, the heating device is an induction heating coil wound on the surface of the first heating pipe, the second heating pipe or the third heating pipe; and the surfaces of the first heating pipe, the second heating pipe or the third heating pipe are coated with insulating layers.
As an improvement of the scheme, the second air outlet pipes are divided into two groups, the two groups are arranged on the second heating pipe and are close to the connecting part of the second heating pipe and the first heating pipe or the vent pipe, the third air outlet pipes are divided into three groups, and the three groups are uniformly distributed on the third heating pipe at intervals and are simultaneously connected into the air outlet collecting pipe.
As an improvement of the above scheme, the screw comprises a rod body, a feeding fan blade group and a reaction fan blade group, wherein the feeding fan blade group is formed by arranging feeding fan blades along the rod body in the same circumference, and the reaction fan blade group is formed by arranging reaction fan blades along the rod body in the same circumference; the inclination angle of the feeding fan blades is larger than that of the reaction fan blades; the reaction fan blade groups are axially arranged on the rod body at intervals of a preset distance; an exhaust gap is arranged between the adjacent reaction fan blades in the same group.
As an improvement of the scheme, all the reaction fan blades of the same reaction fan blade group are positioned in the same spiral plane.
As an improvement of the scheme, all the reaction fan blades of the same reaction fan blade group have the same structure and are circumferentially arranged on the same radial node.
As an improvement of the above scheme, the feeding fan blade group consists of 3 feeding fan blades; the reaction fan blade group consists of 3 reaction fan blades.
Implement the utility model discloses, following beneficial effect has:
adopt this embodiment, can make the acrylic granule after smashing heat in proper order in first heating pipe, second heating pipe and the third heating pipe in heating system to make the gaseous of splitting out appear under the propelling movement of screw rod and stirring, after the segmentation got into each outlet duct, get into cooling system and cool off, accomplish the splitting of inferior gram force board automatically, the gaseous cooling and the storage of MMA, it is efficient, energy-concerving and environment-protective.
Drawings
FIG. 1 is a schematic diagram of a heating system of an MMA monomer production system according to the present invention;
FIG. 2 is a schematic diagram of a cooling system of an MMA monomer production system according to the present invention;
FIG. 3 is a schematic structural view of the water-cooling branch pipe of the present invention;
FIG. 4 is a schematic structural diagram of a liquid nitrogen tank of the present invention;
fig. 5 is a schematic structural view of the first heating pipe, the second heating pipe and the third heating pipe of the present invention;
fig. 6 is a schematic structural view of a first embodiment of the screw of the present invention;
fig. 7 is a schematic structural view of a second embodiment of the screw of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings. Only this statement, the utility model discloses the upper and lower, left and right, preceding, back, inside and outside etc. position words that appear or will appear in the text only use the utility model discloses an attached drawing is the benchmark, and it is not right the utility model discloses a concrete restriction.
With reference to fig. 1 and 2, an embodiment of the present invention provides a system for producing MMA monomers, which includes a heating system 1 and a cooling system 2; the heating system 1 comprises a first heating pipe 11, a second heating pipe 12 and a third heating pipe 13 which are connected in sequence, wherein screw rods 14 are arranged in the first heating pipe 11, the second heating pipe 12 and the third heating pipe 13, and heating devices 15 are arranged in the first heating pipe 11, the second heating pipe 12 and the third heating pipe 13; the front end of the first heating pipe 11 is provided with a feeding hole 111, the first heating pipe 11 is provided with a first air outlet pipe 16, different positions on the second heating pipe 12 are provided with second air outlet pipes 17, different positions on the third heating pipe 13 are provided with third air outlet pipes 18, the second heating pipe 12 is connected with the third heating pipe 13 through a vertically arranged vent pipe 10, the second heating pipe 12 is connected with the side surface of the vent pipe 10, the third heating pipe 13 is connected with the lower end of the vent pipe 10, and the upper end of the vent pipe 10 is connected with a fourth air outlet pipe 19; cooling system 2 is divided pipe 21, water-cooling house steward 22 and liquid nitrogen cooling mechanism 23 including the water-cooling that connects gradually, water-cooling is divided pipe 21 and is used for cooling liquefaction with MMA monomer steam, water-cooling house steward 22 divides the MMA monomer after the liquefaction of pipe 21 to collect the cooling with the water-cooling, liquid nitrogen cooling mechanism 23 is used for cooling the MMA monomer after water-cooling house steward 22 cools off to predetermined temperature to store it.
Adopt this embodiment, can make the ya keli granule after smashing heat in first heating pipe 11, second heating pipe 12 and the third heating pipe 13 in heating system 1 in proper order to make the gaseous of splitting out appear under screw 14's propelling movement and stirring, after the segmentation gets into each outlet duct, get into cooling system 2 and cool off, accomplish the schizolysis of ya keli board automatically, MMA gaseous cooling and storage, it is efficient, energy-concerving and environment-protective.
Specifically, combine fig. 3 and 4, water-cooling minute pipe 21 includes first water-cooling casing 211 and gas flow circulation minute pipe 212, water-cooling main 22's structure is similar with water-cooling minute pipe 21, including second water-cooling casing and gas flow circulation main, gas flow circulation minute pipe 212 is located in first water-cooling casing 211, gas flow circulation main locates in the second water-cooling casing, all be equipped with the coolant liquid in first water-cooling casing 211 and the second water-cooling casing, the coolant liquid cools off in letting in the water-cooling tower. The liquid nitrogen cooling mechanism 23 includes a liquid nitrogen tank having an MMA monomer accommodating chamber 231 and a liquid nitrogen accommodating chamber 232 provided around the MMA monomer accommodating chamber 231; the liquid nitrogen production device is used for supplying liquid nitrogen to the liquid nitrogen containing chamber 232.
The working principle and the steps of the scheme are explained in detail by combining the specific structure of the scheme as follows:
1. and crushing the recycled acrylic plate to obtain acrylic particles.
2. Acrylic particles are added from a feeding hole 111 of the first heating pipe 11, a screw 14 in the first heating pipe 11 rotates, meanwhile, a heating device 15 on the first heating pipe 11 starts to heat the first heating pipe 11, and the temperature of the acrylic particles starts to rise. Referring to fig. 5, the heating device 15 is an induction heating coil wound on the surface of the first heating pipe 11, the second heating pipe 12 or the third heating pipe 13; the surface of the first heating pipe 11, the second heating pipe 12 or the third heating pipe 13 is coated with a heat insulating layer 151 to prevent heat dissipation.
Referring to fig. 6, in order to improve the stacking of the acrylic particles in the heating tube, the screw 14 has a special structure: the screw 14 comprises a rod body 141, a feeding fan blade group 142 and a reaction fan blade group 143, the feeding fan blade group 142 is formed by arranging feeding fan blades along the rod body 141 in the same circumference, and the reaction fan blade group 143 is formed by arranging reaction fan blades along the rod body 141 in the same circumference; the inclination angle of the feeding fan blades is larger than that of the reaction fan blades; the reaction fan blade sets 143 are axially arranged on the rod body 141 at intervals of a predetermined distance; an exhaust gap 144 is arranged between the adjacent reaction fan blades in the same group. When ya keli granule and screw 14 contact, the great feeding fan blade group 142 of inclination can be relatively fast with yakeli granule forward transport, guarantees that the space that gets into yakeli granule in the first heating pipe 11 is compressed, improves the treatment effeciency.
Then, the acrylic particles are in contact with the reaction fan blade group 143, and the reaction fan blade group 143 not only pushes the acrylic forward, but also plays a role in turning the acrylic so as to heat the acrylic uniformly, and more importantly, the gas generated by cracking can be rapidly discharged. According to the first embodiment of the reaction fan blade set 143 of the present invention, all the reaction fan blades 143a of the same reaction fan blade set 143 are located in the same spiral plane. The feeding fan blade group 142 is composed of 3 feeding fan blades; the reaction fan blade set 143 is composed of 3 reaction fan blades 143 a. At this time, all the reaction blades 143a appear as if the screw threads of the screws were cut with 3 notches in the axial direction, and the notches form the exhaust gap 144. By adopting the structure, the reaction fan blades 143a all move on the thread line, the conveying of the acrylic is more stable, and after the acrylic between each group of reaction fan blades 143a is cracked to generate gas, when the exhaust gap 144 of the reaction fan blades 143a faces upwards, the generated gas can move from the exhaust gap 144 to different reaction fan blade groups 143 until being exhausted from the first air outlet pipe 16.
As shown in fig. 7, according to the second embodiment of the reaction fan blade group 143 of the present invention, all the reaction fan blades 143b of the same reaction fan blade group 143 have the same structure and are circumferentially disposed on the same radial node. At this time, all the reaction blades 143b look like blades of a general fan, and the exhaust gap 144 is naturally formed by the gap between the reaction blades 143 b. By adopting the structure, the acrylic is thoroughly stirred when passing through each group of reaction fan blade groups 143, so that the gas is more favorably discharged, the acrylic is heated more uniformly, but the diameter proportion of the feeding fan blade groups 142 and the reaction fan blades 143b is required to be designed, so that the feeding speed of the acrylic is controlled, the phenomenon that the friction force between the acrylic is too large due to too fast feeding is prevented, and the screw 14 cannot rotate or deform and damage is avoided.
3. The acryl moves among the first heating pipe 11, the second heating pipe 12 and the third heating pipe 13 in sequence until all MMA monomers are cracked and discharged. The temperatures of the first heating pipe 11, the second heating pipe 12 and the third heating pipe 13 are sequentially increased, and their temperatures are between 300 and 600 degrees. The first heating pipe 11 and the second heating pipe 12, and the second heating pipe 12 and the third heating pipe 13 are arranged perpendicular to each other. The vertically arranged three sections of tube bodies enable the acrylic to be subjected to steering or dropping when different tube bodies are used, and the blocked acrylic is easy to separate in the steering or dropping process, so that the cracking is convenient to continue.
Wherein, the second outlet pipes 17 are divided into two groups, which are respectively arranged on the second heating pipe 12 and close to the connection part of the second heating pipe 12 and the first heating pipe 11 or the vent pipe 10, and the third outlet pipes 18 are divided into three groups, which are uniformly distributed on the third heating pipe 13 at intervals and are simultaneously connected into the outlet collecting pipe 181. The second heating pipe 12 is connected with the third heating pipe 13 through a vent pipe 10 which is vertically arranged, the second heating pipe 12 is connected with the side surface of the vent pipe 10, and the third heating pipe 13 is connected with the lower end of the vent pipe 10. The acrylic sent from the end of the second heating tube 12 has undergone temperature rise at both ends and most of it has been cracked, but part of the acrylic containing impurities may be aggregated into lumps and is difficult to separate. At this moment, after such inferior gram force gets into permeability cell 10, because do not have screw rod 14 in the permeability cell 10, can not receive the hindrance of screw rod 14, its space is also obviously great, and it is vertical setting, inferior gram force carries out the free fall motion here, utilizes self gravity, separates the inferior gram force piece. Or in the space, the pressure outside the acrylic block is reduced, and the gas in the acrylic block can bounce open the acrylic block into several blocks, escape from the bounced acrylic blocks, and then directly discharge from the fourth gas outlet pipe 19 at the top of the gas permeable pipe 10.
4. Condensation of
The MMA gas generated from the first heating pipe 11, the second heating pipe 12, the third heating pipe 13, and the ventilation pipe 10 is automatically gathered toward the upper portion of the pipe body due to its low density, and is discharged from the corresponding first outlet pipe 16, second outlet pipe 17, third outlet pipe 18, and fourth outlet pipe 19, and enters the water-cooled branch pipe 21. In the water-cooled branch pipe 21, the MMA gas is introduced into the gas-liquid circulation branch pipe 212, and exchanges heat with the coolant in the first water-cooled housing 211, the MMA gas is gradually cooled and liquefied, the volume of the partially liquefied MMA gas is greatly reduced, and then the MMA gas is collected and introduced into the water-cooled header pipe 22. Further cooling in water cooled header 22 converts most of the gas to liquid. Finally, the MMA monomer is introduced into a liquid nitrogen cooling mechanism 23 to reduce the activity thereof, so that the MMA monomer is in a gel-like stable state and is convenient for storage and subsequent treatment.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and decorations can be made without departing from the principle of the invention, and these modifications and decorations are also regarded as the protection scope of the present invention.
Claims (10)
1. A production system of MMA monomer is characterized by comprising a heating system and a cooling system;
the heating system comprises a first heating pipe, a second heating pipe and a third heating pipe which are connected in sequence, wherein screws are arranged in the first heating pipe, the second heating pipe and the third heating pipe respectively, and the first heating pipe, the second heating pipe and the third heating pipe are provided with heating devices respectively;
a feed inlet is formed in the front end of the first heating pipe, a first air outlet pipe is arranged on the first heating pipe, second air outlet pipes are arranged at different positions on the second heating pipe, and third air outlet pipes are arranged at different positions on the third heating pipe;
the second heating pipe is connected with the third heating pipe through a vent pipe which is vertically arranged, the second heating pipe is connected with the side surface of the vent pipe, the third heating pipe is connected with the lower end of the vent pipe, and the upper end of the vent pipe is connected with a fourth air outlet pipe;
cooling system is divided pipe, water-cooling house steward and liquid nitrogen cooling mechanism including the water-cooling that connects gradually, the water-cooling is divided the pipe and is used for cooling liquefaction with MMA monomer steam, the water-cooling house steward divides the MMA monomer after the liquefaction of pipe to collect the cooling with the water-cooling, liquid nitrogen cooling mechanism is used for cooling the MMA monomer after the water-cooling house steward cooling to predetermined temperature to store it.
2. The MMA monomer production system of claim 1, wherein the water-cooled branch pipe comprises a first water-cooled housing and a gas-liquid flow branch pipe, the water-cooled header pipe comprises a second water-cooled housing and a gas-liquid flow header pipe, the gas-liquid flow branch pipe is arranged in the first water-cooled housing, the gas-liquid flow header pipe is arranged in the second water-cooled housing, and the first water-cooled housing and the second water-cooled housing are both provided with a cooling liquid, and the cooling liquid is introduced into a water-cooled tower for cooling.
3. The production system of MMA monomer of claim 2, wherein the liquid nitrogen cooling mechanism comprises a liquid nitrogen tank having an MMA monomer accommodating chamber and a liquid nitrogen accommodating chamber provided around the MMA monomer accommodating chamber, and a liquid nitrogen production device; the liquid nitrogen production device is used for supplying liquid nitrogen to the liquid nitrogen containing cavity.
4. The MMA monomer production system of claim 1, wherein the first and second heating tubes, and the second and third heating tubes are arranged perpendicular to each other.
5. The MMA monomer production system of claim 1, wherein the heating device is an induction heating coil wound around the surface of the first heating tube, the second heating tube, or the third heating tube; and the surfaces of the first heating pipe, the second heating pipe or the third heating pipe are coated with insulating layers.
6. A system for producing MMA monomer according to claim 1, wherein there are two sets of second outlet tubes disposed on the second heating tube near the junction of the second heating tube with the first heating tube or the gas-permeable tube, and three sets of third outlet tubes uniformly spaced apart from each other on the third heating tube and simultaneously connected to the gas outlet header.
7. A system for producing MMA monomer according to claim 1, wherein the screw comprises a rod body, a feeding fan set and a reaction fan set, the feeding fan set is composed of feeding fan blades arranged along the rod body in the same circumference, the reaction fan set is composed of reaction fan blades arranged along the rod body in the same circumference; the inclination angle of the feeding fan blades is larger than that of the reaction fan blades; the reaction fan blade groups are axially arranged on the rod body at intervals of a preset distance; an exhaust gap is arranged between the adjacent reaction fan blades in the same group.
8. A system for producing MMA monomer as claimed in claim 7, wherein all the reaction fan blades of the same reaction fan blade group are located in the same spiral plane.
9. A system for producing MMA monomer as in claim 7, wherein all the reaction fan blades of the same reaction fan blade group have the same structure and are circumferentially arranged at the same radial node.
10. A system for producing MMA monomer according to any one of claims 8 or 9, wherein the feed fan set consists of 3 feed fan blades; the reaction fan blade group consists of 3 reaction fan blades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822140696.4U CN210190253U (en) | 2018-12-19 | 2018-12-19 | Production system of MMA monomer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822140696.4U CN210190253U (en) | 2018-12-19 | 2018-12-19 | Production system of MMA monomer |
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| CN210190253U true CN210190253U (en) | 2020-03-27 |
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| CN201822140696.4U Active CN210190253U (en) | 2018-12-19 | 2018-12-19 | Production system of MMA monomer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109624138A (en) * | 2018-12-19 | 2019-04-16 | 霍振辉 | A kind of production system of MMA monomer |
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2018
- 2018-12-19 CN CN201822140696.4U patent/CN210190253U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109624138A (en) * | 2018-12-19 | 2019-04-16 | 霍振辉 | A kind of production system of MMA monomer |
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