JP2006348065A - Method for recovering dried rubber in pulse combustion and apparatus for recovering dried rubber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for recovering a dried rubber in which the dried rubber can efficiently be recovered by instantaneously drying a rubber composition solution and an apparatus for recovering the dried rubber. <P>SOLUTION: A drying chamber hopper 7 for drying a rubber composition solution W such as rubber latex or rubber solution is connected in horizontal direction to the lower part of a combustion chamber 2a on the outlet side 3a of a tail pipe 3 connected to a combustion part 2 and a feed means 8 of the rubber composition solution W for jetting the rubber composition solution W toward a blasting combustion discharge gas G for jetting from the outlet side 3a of the tail pipe 3 is installed in the lower part of the combustion chamber 2a and further, a discharge gas pipe 9 for discharging water and liquid vaporized to the outside of a drying chamber hopper 7 is connected in perpendicular direction to the lower part of the drying chamber hopper 7. In the feed means 8, the tip of a feed nozzle 8a is horizontally arranged toward the outlet side 3a of the tail pipe and the water content and the liquid of the rubber composition solution W are instantaneously vaporized and dried by jetting the rubber composition solution W toward the blasting combustion discharge gas G jetted from the outlet side 3a of the tail pipe under a prescribed pressure and bringing the rubber composition solution W into contact with the blasting combustion discharge gas G. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a dry rubber recovery method in pulse combustion and a dry rubber recovery apparatus thereof, and more specifically, a rubber composition solution such as rubber latex or rubber solution of natural rubber or synthetic rubber is instantaneously dried by a pulse combustor. The present invention relates to a dry rubber recovery method in pulse combustion that can efficiently recover dry rubber and a dry rubber recovery apparatus thereof.

  Conventionally, as a method for producing natural rubber or synthetic rubber, in the case of natural rubber, natural rubber latex is manually collected from a tree, filtered and then formic acid is added to solidify, and processed into a sheet or block shape. It is shipped (see, for example, Patent Document 1).

  The synthetic rubber latex obtained by emulsion polymerization is coagulated by adding an acid such as saline and dilute sulfuric acid, and the resulting crumb is separated from the serum, and after washing, it is put into an extruder type dryer and dried. After that, we are weighing and packaging.

  However, the former method for producing natural rubber has many manual processes, and has a great effect on the viscosity of rubber products obtained in many production processes such as natural rubber latex coagulation process, washing process and drying process, especially in the drying process. There is a problem that it cannot be said that it is sufficient as a rubber production method due to the influence of variations in rubber products and the quality of the current rubber latex.

On the other hand, the synthetic rubber latex production method, like the natural rubber production method, requires a lot of labor and time for the water removal process after coagulation once, requires large-scale equipment, and increases costs. there were.
JP 2003-26704 A

  The present invention pays attention to such conventional problems, and by injecting the rubber composition solution toward the blasting combustion exhaust gas of the pulse combustor and bringing it into contact, the rubber composition solution is instantaneously dried, and the dry rubber is made efficient. It is an object of the present invention to provide a dry rubber recovery method and dry rubber recovery apparatus in pulse combustion that can be recovered well.

  In order to achieve the above object, according to the present invention, the dry rubber recovery method in the pulse combustion of the present invention is jetted from the tail pipe outlet side to the lower part of the combustion chamber on the tail pipe outlet side connected to the combustion part of the pulse combustor. By injecting and contacting the rubber composition solution toward the blasting combustion exhaust gas, the moisture and liquid of the rubber composition solution are instantly vaporized and dried, and the vaporized moisture and liquid are sent to the drying chamber hopper via the exhaust pipe. The discharged rubber particles are discharged outside and dropped by their own weight toward the outlet side of the drying chamber hopper, and the dried rubber is continuously recovered by the drying rubber recovery means connected to the outlet portion of the drying chamber hopper. The gist is to do.

  Here, the rubber composition solution is rubber latex or a rubber solution, and the dried rubber particles adhering to the lower inner wall surface of the drying chamber hopper are scraped off by the scraping means and dropped to the outlet portion of the drying chamber hopper. In addition, the dry rubber recovered via the dry rubber recovery means is formed into a sheet shape and recovered via a sheeting device.

  Further, the dry rubber recovery device for pulse combustion according to the present invention is a drying unit for drying a rubber composition solution at a lower portion of a combustion chamber on the outlet side of a tail pipe of a pulse combustor comprising a combustion section and a tail pipe accommodated in the combustion chamber. A chamber hopper is connected, and a supply means for injecting a rubber composition solution toward the blasting flue gas ejected from the tail pipe outlet side at the lower portion of the combustion chamber is provided, and vaporized moisture and liquid are partly disposed in the drying chamber hopper The gist of the present invention is that an exhaust pipe for discharging the rubber to the outside of the drying chamber hopper is connected, and a dry rubber recovery means for continuously recovering the dry rubber is connected to the outlet of the drying chamber hopper.

  Here, the rubber composition solution is a rubber latex or a rubber solution, and the dry rubber recovery means for the dry rubber connected to the outlet of the drying chamber hopper is a single screw extruder, a twin screw extruder or a roll mill. In addition, a sheeting device for forming the recovered dry rubber into a sheet shape is provided at the outlet of the dry rubber recovery means.

  Further, scraping means for scraping off the dry rubber particles adhering to the inner wall surface of the drying chamber hopper is provided inside the drying chamber hopper.

  By comprising in this way, a rubber composition solution can be dried instantaneously and dry rubber | gum can be collect | recovered efficiently.

Since the present invention is configured as described above, the following excellent effects can be obtained. (A). By spraying the rubber composition solution toward the blasting combustion exhaust gas of the pulse combustor and bringing it into contact, the rubber composition solution can be dried instantaneously and the dried rubber can be efficiently recovered.
(B) Since the collection operation can be performed automatically and continuously without human intervention, there is no variation in the rubber product, and a high-quality rubber product can be manufactured at a low cost.
(C). Since it can be manufactured efficiently with relatively simple equipment, the cost can be reduced. (D). The rubber latex can be a master batch in which carbon, silica, or the like is mixed.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 shows a schematic configuration diagram of a dry rubber recovery apparatus for carrying out a dry rubber recovery method in pulse combustion according to the present invention, and 1 shows a pulse combustor comprising a combustion section 2 and a tail pipe 3, and this pulse The combustor 1 is accommodated in a combustion chamber 2a provided with an inlet for secondary air A ′, and the combustion section 2 has a suction port 4 for combustion air A and gaseous fuel (for example, natural gas, propane gas, etc.). ) And liquid fuel (for example, kerosene) and the like, and a starter plug 6 are provided.

  In the lower part of the combustion chamber 2a on the outlet side 3a of the tail pipe 3 connected to the combustion part 2, a rubber latex or a rubber solution (a solvent capable of solubilizing rubber, such as toluene, xylene, chloroform, A drying chamber hopper 7 for drying a rubber composition solution W such as a solvent containing at least one of tetrahydrofuran, hexane, heptane, and octane, which may be a mixture of several types) is connected vertically and burned. The lower part of the chamber 2a is provided with a supply means 8 for the rubber composition solution W for injecting the rubber composition solution W toward the blasting combustion exhaust gas G ejected from the tail pipe outlet side 3a. An exhaust pipe 9 for discharging vaporized moisture and liquid to the outside of the drying chamber hopper 7 is connected to the lower portion in a direction orthogonal to each other.

  The supply means 8 is configured such that the tip of the supply nozzle 8a is disposed horizontally toward the tail pipe outlet side 3a, and applies the rubber composition solution W to the blast combustion exhaust gas G ejected from the tail pipe outlet side 3a at a predetermined pressure. The water and liquid of the rubber composition solution W are instantaneously vaporized and dried by being sprayed and brought into contact with each other.

  That is, by injecting the rubber composition solution W into the exhaust gas (in the sound field) generated by the pulse combustor 1, a shock wave (frequency: 60 to 1000 Hz), explosion generated gas, alternating flow, gas temperature (40 ° C. In contact with various “characteristics” of the exhaust gas such as (˜200 ° C.), a dynamic action utilizing pressure fluctuations works, and “instantaneous drying” in which dehydration and drying coexist is performed.

  Then, the moisture and liquid evaporated from the rubber composition solution W are discharged to the outside of the drying chamber hopper 7 through the exhaust pipe 9 as described above, and the dried rubber particles Wx such as natural rubber or synthetic rubber are It is configured to drop by its own weight toward the outlet side of the drying chamber hopper 7 and continuously recover the dry rubber Wz by the dry rubber recovery means 10 connected to the outlet portion 7a of the drying chamber hopper 7. is there.

  The dry rubber recovery means 10 of the dry rubber Wz connected to the outlet portion 7a of the drying chamber hopper 7 is constituted by at least one selected from a single screw extruder, a twin screw extruder, or a roll mill. Then, as shown in FIG. 2, it is composed of a twin screw extruder 11 and a sheeting device 12 such as a roller die attached to the tip thereof. In order to efficiently transport the dry rubber Wz, the biaxial screw extruder 11 is preferably provided with a transport process S1, a mixing process S2, and a degassing process S3 in succession. Wz is formed into a sheet shape with a predetermined thickness by two sheeting rolls 12a and 12b through a degassing step S3 → mixing step S2 → conveying step S1, and is carried out to the next step.

  Further, scraping means 13 for scraping off the dry rubber particles Wx adhering to the inner wall surface 7 b of the drying chamber hopper 7 is provided inside the drying chamber hopper 7. As shown in FIGS. 1 and 3, the scraping means 13 is provided with a substantially cylindrical rotating body 14 that can be rotated via a lubricating seal ring member 14 a at the outlet portion 7 a of the drying chamber hopper 7. A support shaft 15 having a predetermined length is erected at the center of the rotating body 14 toward the center of the drying chamber hopper 7.

  In the middle of the support shaft 15, support members 16 a, 16 b, 16 c having a predetermined length are stretched in a direction orthogonal to the support shaft 15 at a predetermined interval, and the support members 16 a, 16 b, 16 c are stretched. Is provided with scraping blades 17a, 17b, 17c for scraping off the dry rubber particles Wx adhering to the drying chamber hopper 7 while moving along the inner wall surface 7b of the drying chamber hopper 7.

  Further, the support members 16a, 16b, and 16c are formed in a substantially triangular cross section toward the information of the drying chamber hopper 7, and have a structure in which the dry rubber particles Wx are difficult to deposit. The scraping blades 17a, 17b, and 17c are configured such that the angle can be adjusted with the pin 18 as a fulcrum so that the scraper blades 17a, 17b, and 17c can turn along the inner wall surface 7b of the drying chamber hopper 7 with a predetermined gap.

  The inclination angle of the scraping blades 17a, 17b, 17c is preferably about 15 °, although it depends on the angle of the inner wall surface 7b of the drying chamber hopper 7. In this embodiment, support members 16a, 16b, and 16c are stretched at three locations on the support shaft 15, and scraping blades 17a, 17b, and 17c are provided at the three locations. However, the present invention is not limited to these three locations. It can also be provided at three or more locations. Furthermore, the inner wall surface of the drying chamber hopper 7 can be processed with Teflon (registered trademark) or the like so that the dry rubber particles Wx do not easily adhere to the inner wall surface of each part of the scraping means 13. It is also possible to make a structure in which dry rubber particles Wx are difficult to adhere by processing Teflon (registered trademark).

  The rotatable substantially cylindrical rotating body 14 is rotationally driven by a rotational driving means 18 from the outside of the drying chamber hopper 7, and the rotational driving means 18 is a driving pulley 19 that is rotationally driven by a driving motor (not shown). An endless drive belt 20 is wound around the outer peripheral surface of the rotating body 14. Then, the rotational driving force of the drive pulley 19 is transmitted to the rotating body 14 via the driving belt 20, and the scraping blade is further rotated by the rotation of the rotating body 14 via the support members 16 a, 16 b and 16 c provided on the support shaft 15. The adhering dry rubber particles Wx are scraped off while moving 17a, 17b, 17c along the inner wall surface 7b of the drying chamber hopper 7.

  The rotation driving means 18 is not limited to the above configuration, and it is possible to transmit the driving force by a gear mechanism or the like.

  Further, the scraping means 13 for scraping off the dry rubber particles Wx adhering to the inner wall surface 7b of the drying chamber hopper 7 is not limited to the above-described embodiment. For example, as shown in FIG. The upper drying chamber 7x and the lower drying chamber 7y are separated from each other, and the lower drying chamber 7y is configured to be rotationally driven by the same rotational driving means 18 as described above. A plurality of scraping blades 17d fixed along the inner wall surface of the lower drying chamber 7y are suspended.

  Then, by rotating the lower drying chamber 7y at a predetermined speed by the rotation driving means 18 as described above, the dry rubber particles Wx adhering to the inner wall surface of the lower drying chamber 7y are scraped off by the fixed scraping blade 17d. It is also possible to do so. By comprising in this way, an apparatus can be simplified compared with 1st Embodiment, and installation cost can also be reduced.

  Since other configurations and operations are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted.

Next, a method for recovering the dry rubber Wz using the dry rubber recovery device will be described.
First, the tip of the supply nozzle 8a of the supply means 8 is directed to the lower part of the combustion chamber 2a on the outlet side 3a of the tail pipe 3 connected to the combustion section 2 toward the blast combustion exhaust gas G ejected from the outlet side 3a of the tail pipe 3. Then, the rubber composition solution W is sprayed and brought into contact.

  As a result, the water and liquid of the rubber composition solution W are vaporized and dried instantaneously (for example, 0.01 seconds), and the vaporized water and liquid are discharged to the outside of the drying chamber hopper 7 through the exhaust pipe 9. At the same time, the dried natural rubber or synthetic rubber rubber particles Wx are dropped by their own weight toward the outlet side of the drying chamber hopper 7, and are collected by the dry rubber recovery means 10 connected to the outlet portion 7 a of the drying chamber hopper 7. Dry rubber Wz is continuously collected.

  When the rubber composition solution W is dried by bringing it into contact with the blasting combustion exhaust gas G, the dried rubber particles Wx adhere to the inner wall surface 7b of the drying chamber hopper 7, so that the scraping means can be used for efficient recovery. 13 is scraped off and dropped onto the outlet 7 a of the drying chamber hopper 7.

  Further, when the dry rubber Wz is continuously collected, the dry rubber Wz is formed into a sheet shape via the sheeting device 12 and collected in order to facilitate the next process and stock.

  In the present invention, as described above, the rubber composition solution W is instantaneously dried by spraying the rubber composition solution W toward the blasting combustion exhaust gas G of the pulse combustor 1 to bring it into contact with each other, thereby efficiently drying the dried rubber. It can be recovered. Further, since the collection operation can be performed automatically and continuously without human intervention, there is no variation in the rubber product, and a high-quality rubber product can be manufactured at a low cost. Furthermore, since it can be manufactured efficiently with relatively simple equipment, the cost can be reduced.

It is a schematic block diagram of the dry rubber collection | recovery apparatus for enforcing the dry rubber collection | recovery method in the pulse combustion of this invention. It is an AA arrow top view of FIG. It is a schematic block diagram of a scraping means. It is a schematic block diagram which shows other embodiment of a scraping means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pulse combustor 2 Combustion part 2a Combustion chamber 3 Tail pipe 4 Suction port 3a Tail pipe exit side 5 Fuel supply port 6 Starter plug 7 Drying chamber hopper 7a Outlet portion 7b Inner wall surface 7x Upper drying chamber 7 7y Lower drying chamber 8 Supply Means 8a Supply nozzle 9 Exhaust pipe 10 Dry rubber recovery means 11 Twin screw extruder 12 Seating device 12a, 12b Seating roll 13 Scraping means 14 Rotating body 14a Lubricating seal ring member 15 Support shaft 16a, 16b, 16c Support member 17a, 17b , 17c Scraping blade 18 Pin 19 Drive pulley 20 Drive belt A Combustion air G Explosion combustion exhaust gas W Rubber composition solution Wx Dry rubber particle Wz Dry rubber A 'Secondary air

Claims (9)

A rubber composition solution is formed by injecting a rubber composition solution into a lower combustion chamber on the tail pipe outlet side connected to the combustion section of the pulse combustor and bringing it into contact with the blast combustion exhaust gas ejected from the tail pipe outlet side. Moisture and liquid are instantly vaporized and dried, and the vaporized water and liquid are discharged to the outside of the drying chamber hopper via the exhaust pipe, and the dried rubber particles are directed toward the outlet side of the drying chamber hopper. A dry rubber recovery method in pulse combustion, wherein the dry rubber is dropped by its own weight, and the dry rubber is continuously recovered by a dry rubber recovery means connected to the outlet of the drying chamber hopper. The method for recovering dry rubber in pulse combustion according to claim 1, wherein the rubber composition solution is rubber latex or a rubber solution. The method for recovering dry rubber in pulse combustion according to claim 1 or 2, wherein the dry rubber particles adhering to the lower inner wall surface of the drying chamber hopper are scraped off by a scraping means and dropped to the outlet of the drying chamber hopper. 4. The dry rubber recovery method in pulse combustion according to claim 1, 2 or 3, wherein the dry rubber recovered via the dry rubber recovery means is formed into a sheet shape and recovered via a sheeting device. A drying chamber hopper for drying the rubber composition solution is connected to the lower portion of the combustion chamber on the tail pipe outlet side of the pulse combustor comprising a combustion section and a tail pipe accommodated in the combustion chamber, and the tail pipe outlet is connected to the lower portion of the combustion chamber. A supply means for injecting the rubber composition solution toward the blasting combustion exhaust gas ejected from the side is provided, and an exhaust pipe for discharging vaporized moisture and liquid to the outside of the drying chamber hopper is connected to a part of the drying chamber hopper. An apparatus for recovering dry rubber in pulse combustion, characterized in that dry rubber recovery means for continuously recovering dry rubber is connected to the outlet of the drying chamber hopper. The dry rubber recovery apparatus in pulse combustion according to claim 5, wherein the rubber composition solution is rubber latex or a rubber solution. The dry rubber recovery means for the dry rubber connected to the outlet of the drying chamber hopper is at least one selected from a single screw extruder, a twin screw extruder, or a roll mill. Dry rubber recovery device in pulse combustion. The dry rubber recovery apparatus in pulse combustion according to claim 5, 6 or 7, wherein a sheeting device for forming the recovered dry rubber into a sheet shape is provided at an outlet of the dry rubber recovery means. 9. The dry rubber recovery apparatus in pulse combustion according to claim 5, 6, 7 or 8, wherein scraping means for scraping dry rubber particles adhering to an inner wall surface of the dry chamber hopper is provided inside the dry chamber hopper.

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