JP6447033B2 - Device for preventing fogging of sight glass for internal observation, stirring processing system, and method for preventing fogging of sight glass for internal observation - Google Patents

Description

  The present invention provides a sight glass anti-fogging device for preventing the sight glass from being fogged when the generated gas comes into contact with the internal observation sight glass when the contents generated by gas such as stirring and kneading are processed. The present invention relates to a processing system provided with an anti-fogging device and a sight glass anti-fogging method using the anti-fogging device.

Conventionally, when a thermoplastic resin or the like is industrially processed such as stirring and kneading, an agitation processing apparatus equipped with a sight glass for internal observation has been used.
For example, in a stirring treatment device used in the stabilization process of polyacetal, unstable end groups in the crude polymer obtained by the polymerization reaction are decomposed by heat, so that the surface of the melted crude polymer is renewed in a reduced-pressure atmosphere. The contents are stirred and kneaded.
At this time, a large amount of formaldehyde gas is generated due to the decomposition of unstable end groups in the crude polymer. On the other hand, in the stirring treatment device, as described above, the state of the contents during the stirring / kneading process is observed, and the amount of the contents is kept constant in order to stabilize the stirring efficiency and stabilize the quality. Is provided with a sight glass for internal observation.

Since this internal observation sight glass cannot be kept warm, it is always cooled by the outside air or the like. Therefore, when the formaldehyde gas generated by the above decomposition comes into contact with such an internal observation sight glass, the formaldehyde gas adheres as solid paraformaldehyde. It becomes impossible to observe.
The following Patent Document 1 discloses a reaction apparatus provided with a fog prevention member for preventing fogging of such an internal observation sight glass.

  And in this patent document 1, the said fog prevention member is arrange | positioned on the path | route which connects the internal observation sight glass and reaction container, and gas is discharge | released with respect to this fog prevention member to the internal exposed surface of the internal observation sight glass By providing the opening part which does, the contact of the decomposition gas with respect to the said internal observation sight glass is avoided, and the fogging of the internal observation sight glass is prevented.

JP 2008-246467 A

However, as in the above-mentioned Patent Document 1, during the operation of the reaction apparatus, the gas is always released for the purpose of preventing the decomposition gas generated in the reaction vessel from coming into contact with the internal observation sight glass. It is useless and inefficient.
Moreover, the release of this gas toward the inner exposed surface of the internal observation sight glass does not completely prevent the decomposition gas from contacting the internal observation sight glass. May occur.

  Accordingly, the present invention provides a sight glass anti-fogging device, a processing system, and a site capable of reliably preventing the generated gas generated in a processing device such as a stirring processing device from flowing into the internal observation sight glass. An object is to provide a method for preventing fogging of glass. Further, the present invention provides a sight glass anti-fogging device capable of efficiently using an inert gas without waste by introducing a necessary amount of an inert gas at a necessary place when necessary. Another object of the present invention is to provide a processing system and a method for preventing sight glass from fogging.

In order to solve the above-mentioned problem, the sight glass anti-fogging device according to the first aspect of the present invention is a sight glass anti-fogging device provided for observing the state of the contents in the processing device. A housing provided on a path connecting the processing apparatus and the sight glass, in which a space used as a flow path when observing the state of contents in the processing apparatus or introducing an inert gas is formed And a gas inlet path for introducing an inert gas into the space, and a gas inlet path for introducing an inert gas into the space. Fluid gas shielding means for preventing the generated gas generated in the processing apparatus from coming into contact with the internal observation sight glass using the flow of the inert gas introduced from the inside.
According to this configuration, even if the generated gas generated in the processing apparatus rises and reaches the path connected to the sight glass, the mechanical gas shielding means is provided on the path. By closing the opening / closing means of the mechanical gas shielding means, the contact of the generated gas with the sight glass is mechanically reliably prevented.

The space inside the housing of the mechanical gas shielding means is provided with a gas introduction path for introducing an inert gas, and the inert gas introduced from the gas introduction path serves as a purge gas to form the sight glass. A fluid gas shielding means using a flow of an inert gas that flows toward a space immediately below and inside the processing apparatus is provided.
Thereby, even if the generated gas generated in the processing apparatus rises and tries to flow toward the sight glass, it is blocked by the flow of the inert gas functioning as the purge gas, and further increase is restricted. Contact of the generated gas with the sight glass is also prevented fluidically.

Further, as in the second aspect of the present invention, the opening / closing means can be constituted by a rotary ball valve that rotates by a predetermined angle. According to this configuration, it is possible to prevent the generated gas from flowing into the sight glass side reliably and inexpensively.
Further, as in the third aspect of the present invention, the opening / closing means can be constituted by a sliding shutter. Even with this configuration, the generated gas can be prevented from flowing into the sight glass side, and a slight leakage of the generated gas when the shutter is slid with the fluid gas shielding means using the flow of the inert gas. The combination can be adequately addressed.

Moreover, it is possible to form the opening part of a gas introduction path so that the outer peripheral part of the inner side exposed surface of the said sight glass may be followed like the 4th aspect of this invention.
According to this configuration, the inert gas that has flowed from the gas introduction path into the space inside the housing flows in a vortex from the outer peripheral surface of the inner exposed surface of the sight glass toward the inner periphery thereof. As a result, the flow of the generated gas can be efficiently regulated with a small amount of inert gas, and fogging of the entire surface of the sight glass can be effectively prevented.
Further, as in the fifth aspect of the present invention, the opening / closing means is a three-way valve capable of a three-way open state, and the three-way valve is connected to the gas introduction path in the three-way open state. According to this configuration, since the inflow / outflow of the inert gas and the observation / non-observation by the sight glass can be linked, the operation becomes easy.
Further, as in the sixth aspect of the present invention, the gas introduction path is a gas introduction path having an opening in the housing, or a through hole penetrating the housing. According to this configuration, the inert gas can be reliably guided into the space of the housing.

Further, as in the seventh aspect of the present invention, the content for generating gas is at least selected from polycarbonate, polyacetal, polyethylene terephthalate, polybutylene terephthalate, polyamide, polylactic acid, polystyrene, acrylic resin, and methacrylic resin. It is possible to include one type of thermoplastic resin.
Further, as in the eighth aspect of the present invention, the content for generating gas is at least selected from polycarbonate, polyacetal, polyethylene terephthalate, polybutylene terephthalate, polyamide, polylactic acid, polystyrene, acrylic resin, and methacrylic resin. It is also possible to include an oligomer of a single thermoplastic resin.
Further, as in the ninth aspect of the present invention, the gas generated from the contents is selected from phenol, formaldehyde, trioxane, terephthalic acid, ε-caprolactam, lactic acid, styrene, acrylic ester, and methacrylic ester. It is also possible to include at least one kind.
That is, according to these structures, for example, the content in which the unstable end groups in the polymer are actively decomposed to generate a large amount of easily polymerizable formaldehyde gas, or condensed and solid For example, when the contents in which the phenol gas is generated are processed such as stirring / kneading, storage, and conveyance, it is possible to effectively prevent the sight glass from being fogged.

Further, as in the tenth aspect of the present invention, the inert gas to be used can be composed of at least one inert gas selected from nitrogen, helium, and argon.
According to this configuration, it is possible to prevent fogging of the sight glass by effectively using an inert gas as a purge gas without hindering the processing of the contents performed in the processing apparatus. Become.

Further, the processing system of the eleventh aspect of the present invention is a processing apparatus for storing contents and processing the contents, and a sight glass provided for observing the state of the contents in the processing apparatus, A sight glass anti-fogging device provided on a path connecting the agitation processing device and the sight glass, the sight glass anti-fogging device having an internal content of the processing device. A housing in which a space used as a flow path when observing the state of an object or introducing an inert gas is formed, and an opening / closing means for switching between permitting and restricting inflow / outflow of the gas flowing through the space, A mechanical gas shielding means, and a gas introduction path for introducing an inert gas into the space, and the generation of gas generated in the processing apparatus using the flow of the inert gas introduced from the gas introduction path. Are provided with fluid gas blocking means for preventing contact with the sight glass for internal observation of gas.
According to this configuration, two types of gas shielding means such as a mechanical gas shielding means and a fluid gas shielding means act on a processing system including a sight glass to multiplex the flow of generated gas toward the sight glass. Therefore, it is possible to use an inert gas efficiently and without waste, and it is possible to reliably prevent the flow of the generated gas toward the sight glass side.

Further, as in the twelfth aspect of the present invention, a thermoplastic resin and / or an oligomer of a thermoplastic resin can be used as the contents, and the thermoplastic resin and / or the oligomer of the thermoplastic resin can be processed. It is possible to employ a vertical processing apparatus.
According to this configuration, a processing system including a compact and space-saving stirring processing device, a kneading processing device, and the like that can effectively prevent the occurrence of fogging on the sight glass under conditions where a large amount of generated gas is generated. It becomes possible to provide.

Further, as in the thirteenth aspect of the present invention, a thermoplastic resin and / or an oligomer of a thermoplastic resin can be used as the contents, and the thermoplastic resin and / or the oligomer of the thermoplastic resin can be processed. A horizontal processing apparatus can be employed.
According to this configuration, it is possible to provide a large processing system having an excellent processing capacity including an extruder that can effectively prevent the occurrence of fogging on the sight glass under a condition where a large amount of generated gas is generated. It becomes possible.

The sight glass anti-fogging method according to the fourteenth aspect of the present invention is provided on a path connecting the processing apparatus and the sight glass, and the state of the contents in the processing apparatus is observed in the interior. A mechanical gas shielding means comprising: a housing in which a space used as a flow path in the case of introducing an active gas is formed; and an opening / closing means for switching between permitting and regulating the inflow / outflow of the gas flowing through the space; A fluid that has a gas introduction path for introducing an inert gas into the space and prevents the generated gas generated in the processing apparatus from contacting the sight glass by using a flow of the inert gas introduced from the gas introduction path A sight glass anti-fogging method using a sight glass anti-fogging device comprising a gas shielding means, and when observing the inside of the processing apparatus from the sight glass, By introducing an inert gas with the closing means in an open state, the fluid gas shielding means is operated to prevent the generated gas generated in the processing apparatus from contacting the internal observation sight glass. Except for the above, the opening / closing means is closed and the mechanical gas shielding means is operated to prevent the generated gas generated in the processing apparatus from contacting the sight glass.
According to this configuration, the flow of the generated gas to the sight glass side is made by closing the opening / closing means except during observation for observing the state of the contents in the processing apparatus using the sight glass. It becomes possible to shield mechanically reliably.

On the other hand, when observing the state of the contents in the processing apparatus using the sight glass, the space in the housing is opened by observing the inside of the stirring processing apparatus by opening the opening / closing means. The inert gas introduced from the gas introduction path is introduced into the processing apparatus.
Thereby, since the flow of the generated gas which is going to flow to the sight glass side is regulated by the reverse flow of the inert gas, the flow of the generated gas is fluidly shielded.
Accordingly, the mechanical gas shielding means and the fluid gas shielding means act in a multiple manner to enable efficient and lean use of inert gas, resulting from contact of the generated gas with the sight glass. It is possible to reliably prevent fogging of the internal observation sight glass.

According to the sight glass anti-fogging device, the processing system, and the sight glass anti-fogging method of the present invention, it is possible to introduce a necessary amount of an inert gas at a necessary place when necessary, which is efficient and wasteful. Use of inert gas becomes possible.
Further, by using the mechanical gas shielding means and the fluid gas shielding means in combination, it is possible to reliably prevent the generated gas generated in the processing apparatus from flowing into the sight glass side by the complementary action of the two types of gas shielding means. Is possible.

1 is a side sectional view showing a schematic configuration of an agitation processing system according to a first embodiment of the present invention. It is a sectional side view which shows the state at the time of observation in the fog prevention apparatus of the sight glass for internal observation which concerns on the 1st Embodiment of this invention. It is side sectional drawing which shows states other than the time of observation in the fogging prevention apparatus of the sight glass for internal observation which concerns on the 1st Embodiment of this invention. It is a sectional side view which shows the structure of the outline of the stirring processing system which concerns on the 2nd Embodiment of this invention. It is a side view of the state which fractured | ruptured a part which shows the schematic structure of the stirring processing system which concerns on the 3rd Embodiment of this invention. It is a sectional side view which shows the fog prevention apparatus of the sight glass for internal observation which concerns on the 4th Embodiment of this invention. It is a sectional side view which shows the fog prevention apparatus of the sight glass for internal observation which concerns on the 5th Embodiment of this invention.

The internal observation sight glass anti-fogging device, the stirring treatment system, and the internal observation sight glass anti-fogging method of the present invention will be described with reference to the drawings, taking the first to fifth embodiments shown below as examples. .
In the following description, the schematic configuration of the stirring treatment system of the present invention will be described first by taking the stirring processing system according to the first embodiment shown in FIG. 1 as an example, and then the main components of the stirring processing system will be described. A specific configuration of the anti-fogging device for internal observation sight glass according to the present invention, which is a simple constituent member, is shown as an example of the anti-fogging device for internal observation sight glass according to the first embodiment shown in FIGS. Will be described in detail.

Subsequently, taking the case of using the anti-fogging device for internal observation sight glass according to the first embodiment as an example, the internal observation of the present invention is combined with the operation mode of the anti-fogging device for internal observation sight glass. A method for preventing fogging of sight glass will be described.
Furthermore, the schematic configuration of the agitation processing system of a type different from that of the agitation processing system according to the first embodiment is shown in FIG. 5 and the agitation processing system according to the second embodiment shown in FIG. An example of the agitation processing system according to the third embodiment will be described focusing on differences from the first embodiment.
Finally, the configuration and operation mode of the anti-fogging device for internal observation sight glass according to the first embodiment, which is different from the anti-fogging device for internal observation sight glass according to the first embodiment, is shown in FIG. Taking the anti-fogging device for internal observation sight glass according to the embodiment and the anti-fogging device for internal observation sight glass according to the fifth embodiment shown in FIG. 7 as an example, the first embodiment The difference will be mainly explained.

[First Embodiment]
(1) Schematic configuration of stirring processing system (see FIG. 1)
An agitation processing system (processing system) 1 of the present invention includes an agitation processing device (processing device) 3 that is a container that contains the content A and performs processing such as agitation and / or kneading of the content A, and the agitation processing. An internal observation sight glass 5 provided for observing the state of the contents A in the apparatus 3 and an internal observation sight glass provided on a path connecting the stirring processing device 3 and the internal observation sight glass 5. The anti-fogging device (hereinafter also referred to as anti-fogging device) 7 is basically configured.
The anti-fogging device 7 comprises two types of gas shielding means, mechanical gas shielding means 9 and fluid gas shielding means 11.

Further, the stirring processing system 1A according to the present embodiment uses a thermoplastic resin as the content A, and is a vertical stirring processing apparatus capable of performing the stirring and kneading processing of the thermoplastic resin under a reduced pressure atmosphere. 3A is a vertical installation type stirring processing system.
The stirrer 3A has an airtight structure and a pressure-resistant structure that can withstand a reduced pressure atmosphere, and the stirrer 3A directly acts on the contents A put in the stirrer 3A to stir and knead. A stirring blade 13 that is rotated by a motor M that performs processing is disposed. In addition, although the stirring processing apparatus of each embodiment has illustrated what performs a process in a pressure-reduced atmosphere, it is not limited to this, The thing which processes in a pressurized atmosphere is also included.

Although not shown, the stirring processing device 3A is a jacket or a raw material in which a space for supplying a heating medium for heating the contents A charged in the stirring processing device 3A is formed. Pipes or the like for connecting to the inlet and outlet of the content A or a decompression device provided outside are appropriately provided.
Further, the generated gas G generated from the content A by the stirring / kneading process is directed to the generated gas processing facility 15 provided outside at a position above the stirring processing device 3A higher than the liquid level L of the content A. An exhaust port 17 for exhausting the air and an attachment opening 19 for attaching the above-described internal observation sight glass 5 are provided.

The internal observation sight glass 5 is a member that functions as a window for observing how the content A put in the stirring treatment device 3A changes state during the stirring / kneading treatment, and has excellent visibility. It is formed as an example by transparent heat-resistant glass or the like.
Further, in the present embodiment, the internal observation sight glass 5 is provided with a mounting base 21 as shown in the figure on the portion where the mounting opening 19 is formed at the upper part of the above-described stirring processing device 3A. The anti-fogging device 7 for the internal observation sight glass according to the present invention is interposed between the mounting base 21 and the internal observation sight glass 5.

(2) Specific configuration of anti-fogging device for sight glass for internal observation (see FIGS. 2 and 3)
The anti-fogging device 7 for the internal observation sight glass of the present invention is provided on the path connecting the agitation processing device 3A and the internal observation sight glass 5 as described above, and the mechanical gas shielding means 9 and the fluid gas. It is constituted by providing two types of gas shielding means together with the shielding means 11.
The mechanical gas shielding means 9 is a housing 25 in which a space 23 used as a flow path for observing the state of the contents A in the agitation processing apparatus 3A or introducing an inert gas N is formed. And an opening / closing means 27 that is provided in the middle of the space 23 and switches between permitting and restricting the inflow / outflow of the gas flowing through the space 23.

Further, the fluid gas shielding means 11 includes a gas introduction path 29 for introducing the inert gas N into the space 23, and a stirring treatment device using the flow of the inert gas N introduced from the gas introduction path 29 This is a shielding means for the generated gas G using the flow of the inert gas N to prevent the generated gas G generated in 3A from contacting the internal observation sight glass 5. In addition, although the fluid gas shielding means 11 is comprised from the gas introduction path 29 arrange | positioned through the housing 25 of FIG. 2, it is not limited to this. For example, the fluid gas shielding means 11 may be constituted by a through hole penetrating the housing 25, and the inert gas N may be supplied into the space 23 of the housing 25 through the through hole.
In the internal observation sight glass anti-fogging device 7A according to the present embodiment, a ball valve 31 is applied as the opening / closing means 27.

As an example, the housing 25 is a cylindrical member having attachment flange portions 33 and 35 formed at both ends, and the ball valve 31 described above is attached at a position near the center thereof.
The ball valve 31 is disposed in a direction Y that intersects the axial direction Z of the space 23 formed with respect to the housing 25, and a rotating shaft 37 that rotates around the intersecting direction Y by a predetermined angle (for example, 90 °). The valve body 39 attached to one end of the rotary shaft 37 on the housing 25 side and the operation handle 41 attached to the other end of the rotary shaft 37 are provided as an example.

The valve body 39 is formed in a spherical shape, and the valve body 41 has an engagement hole 43 having a predetermined depth to be engaged with one end of the rotating shaft 37 and a space 23 of the housing 25. A through hole 45 having substantially the same diameter as the space 23 to be formed is provided.
In addition, the said valve body 39 will be in the state which the said through-hole 45 will be in the state along the said space 23 at the time of the observation which observes the state of the content A in 3 A of stirring processing apparatuses so that it may mention later. On the other hand, except at the time of observation, the rotating shaft 37 is rotated by 90 °, and the through hole 45 intersects the space 23 and is closed.

2 and 3, members denoted by reference numerals 47 and 49 are annular packings, and are appropriately provided to ensure airtightness between the space 23 and the valve body 39.
The gas introduction path 29 is a member having a small cylindrical shape as an example, and the opening 51 formed in the connection portion with the space 23 is an outer peripheral portion of the inner exposed surface 53 of the internal observation sight glass 5. 54 is formed from the tangential direction as an example.

Incidentally, by providing the opening 51 at such a position, the inert gas N that has flowed into the space 23 inside the housing 25 from the gas introduction path 29 is allowed to pass through the outer peripheral portion 54 of the inner exposed surface 53 of the internal observation sight glass 5. Then, the gas flows in a vortex from the inner periphery to the inner periphery, and the flow of the generated gas G can be efficiently regulated even with a small amount of inert gas N.
The content A is preferably a thermoplastic resin containing at least one selected from polycarbonate, polyacetal, polyethylene terephthalate, polybutylene terephthalate, polyamide, polylactic acid, polystyrene, acrylic resin, and methacrylic resin. Is possible. Further, as the content A, it is possible to include at least one oligomer of the thermoplastic resin. Further, the gas generated from the content A may include, as an example, at least one selected from phenol, formaldehyde, trioxane, terephthalic acid, ε-caprolactam, lactic acid, styrene, acrylic acid ester, and methacrylic acid ester. Is possible. Furthermore, as the content A, at least one thermoplastic resin selected from phenol, formaldehyde, trioxane, terephthalic acid, ε-caprolactam, lactic acid, styrene, acrylic ester, and methacrylic ester, or oligomer of the thermoplastic resin Contains the ingredients.
In addition, these contents A are illustrations, and the present invention is a thermoplastic resin and / or thermoplastic resin in which a polymerizable gas such as formaldehyde or methyl methacrylate or a coagulable gas such as phenol is generated. It can be used for all resin oligomers.

Of these, when polyacetal is applied as the content A, a large amount of formaldehyde gas is generated as the generated gas G by decomposing unstable end groups in the polymer in the stirring apparatus 3A. When this formaldehyde gas comes into contact with the internal observation sight glass 5, it becomes paraformaldehyde and adheres to the internal observation sight glass 5, so that the inside of the stirring treatment device 3 </ b> A cannot be observed.
In the present invention, the two types of gas shielding means, the mechanical gas shielding means 9 and the fluid gas shielding means 11 described above, prevent the contact of the generated gas G with the internal observation sight glass 5, so that the internal observation is possible. From inside the sight glass 5, the inside of the stirring treatment device 3A can always be observed satisfactorily.

In addition, as the inert gas N, various gases that function as a purge gas for the generated gas G can be applied without hindering the gas generation from the contents A in the stirring treatment device 3A.
For example, at least one inert gas selected from nitrogen, helium, and argon can be applied as the inert gas N.

(3) Method for preventing fogging of sight glass for internal observation (see FIGS. 2 and 3)
The method for preventing fogging of the sight glass for internal observation of the present invention uses an internal observation sight glass fogging preventing device 7 provided with the mechanical gas shielding means 9 and the fluid gas shielding means 11 described above. This is a method for preventing fogging of observation sight glass.
When observing the inside of the stirring treatment device 3A from the internal observation sight glass 5, the fluid gas shielding means 11 is activated by introducing the inert gas N with the opening / closing means 27 open, and the generation is performed. The gas G is prevented from coming into contact with the sight glass 5 for internal observation. On the other hand, except during the observation, the open / close means 27 is closed and the mechanical gas shielding means 9 is operated to observe the generated gas G inside. A feature of the present invention is that contact with the sight glass 5 is prevented.

Hereinafter, taking the case of using the internal observation sight glass anti-fogging device 7A according to the first embodiment as an example, together with the operation mode of the anti-fogging device 7A, the internal observation sight glass of the present invention will be described. The details of the fog prevention method will be specifically described separately for (a) observation and (b) other than observation.
(A) During observation (see FIG. 2)
At the time of observation, the operation handle 41 is held and the operation handle 41 is rotated in a predetermined direction to open the valve body 39 as shown in FIG. In this state, since the through-hole 45 of the valve body 39 is in a state along the space 23, the inside of the stirring treatment device 3A can be observed from the internal observation sight glass 5.

Further, the inert gas N flows from the gas introduction path 29 into the space 23 inside the housing 25 and flows from the outer peripheral portion 54 of the inner exposed surface 53 of the internal observation sight glass 5 toward the inner periphery. It flows into the stirring treatment device 3 </ b> A through the through-hole 45 of the body 39.
Thus, since the inert gas N functions as a purge gas that restricts the rise of the generated gas G, the generated gas G cannot reach the internal observation sight glass 5, and the two do not contact each other. Therefore, the internal observation sight glass 5 is not fogged, so that good visibility is obtained, and the state of the contents A in the stirring processing device 3A is smoothly observed.

(B) Other than during observation (see Fig. 3)
Except for the time of observation, the operation handle 41 is held and the operation handle 41 is rotated in a predetermined direction (the direction opposite to the time of observation) to bring the valve element 39 into the closed state shown in FIG.
In this state, since the through hole 45 of the valve body 39 intersects the space 23, the space 23 is closed at the installation site of the valve body 39, and the inflow / outflow of gas is regulated. .

Therefore, even if the generated gas G generated in the stirring processing device 3A rises and flows into the space 23 from the mounting opening 19, the flow toward the internal observation sight glass 5 side is reliably regulated by the valve body 39. Therefore, fogging does not occur in the internal observation sight glass 5.
Further, in the state where the valve body 39 is in the closed state, it is not necessary to use the inert gas N as the purge gas, so that the supply of the inert gas N can be stopped.

Then, according to the sight glass fogging preventing device 7A for internal observation, the agitation processing system 1A, and the mist preventing method for internal observation sight glass according to the present embodiment configured as described above, the necessary portions when necessary. The amount of inert gas N necessary for this can be introduced, and the inert gas N can be used efficiently and without waste.
Further, the combined use of the mechanical gas shielding means 9 and the fluid gas shielding means 11 allows the generated gas G generated in the agitation processing apparatus 3A to flow into the internal observation sight glass 5 side so that these two kinds of gas shielding means. It becomes possible to prevent reliably by the complementary action.

[Second Embodiment] (See FIG. 4)
The agitation processing system 1B according to the second embodiment replaces the agitation processing system 1A according to the first embodiment with the vertical agitation processing device 3A, instead of the horizontal agitation processing device 3A. This is an embodiment employing 3B.
Accordingly, the agitating blade 13 is mounted sideways, and the positions where the exhaust port 17 and the mounting opening 19 are provided are different, but the other configurations are the same as in the first embodiment. And basically the same.

Even with the stirring processing system 1B according to the second embodiment configured as described above, as in the stirring processing system 1A according to the first embodiment, the inert gas N can be used efficiently and without waste. It is possible to reliably prevent the generated gas G from flowing into the internal observation sight glass 5 side by adopting two types of gas shielding means, the mechanical gas shielding means 9 and the fluid gas shielding means 11. It becomes possible.
Furthermore, according to this embodiment, since the area of the liquid level L of the content A accommodated in the stirring treatment device 3B becomes larger than that in the first embodiment, more gas is generated from the content A. It becomes active and the stirring / kneading process is facilitated.

[Third Embodiment] (See FIG. 5)
The agitation processing system 1C according to the third embodiment is an embodiment applied to an extruder provided with a horizontal agitation processing apparatus 3C, similarly to the agitation processing system 1B according to the second embodiment.
Along with this, a screw 55 is provided instead of the stirring blade 13, and the difference is that a die 59 is provided for the driving device 57 and the head for driving the screw 55. The basic configuration is the same as in the first and second embodiments.

The agitation processing system 1C according to the third embodiment configured as described above is similar to the agitation processing system 1A according to the first embodiment and the agitation processing system 1B according to the second embodiment. The inert gas N can be used efficiently and wastefully, and the internal gas observation site for the generated gas G can be obtained by adopting two types of gas shielding means, the mechanical gas shielding means 9 and the fluid gas shielding means 11. Inflow to the glass 5 side can be reliably prevented.
Furthermore, according to the present embodiment, the application can be expanded to fields such as extrusion molding of thermoplastic resins.

[Fourth Embodiment] (See FIG. 6)
The anti-fogging device 7D for internal observation sight glass according to the fourth embodiment is a ball that has been adopted as the opening / closing means 27 in the anti-fogging device 7A for internal observation sight glass according to the first embodiment. In this embodiment, a sliding shutter 61 is employed instead of the valve 31.
Accordingly, the housing 25 is provided with a shutter plate 63 that performs a substantial opening and closing action of the space 23 and a driving means 65 that drives the shutter plate 63. In the illustrated embodiment, a control device 67 is further provided so that the supply of the inert gas N and the stop of the supply can be switched in conjunction with the opening / closing operation of the shutter plate 63. ing.

Similarly to the anti-fogging device 7A for internal observation sight glass according to the first embodiment, the anti-fogging device 7D for internal observation sight glass according to the fourth embodiment configured in this manner is used. It is possible to use the inert gas N efficiently and without waste, and the use of two types of gas shielding means, the mechanical gas shielding means 9 and the fluid gas shielding means 11, provides a sight glass for internal observation of the generated gas G. Inflow to the side 5 can be reliably prevented.
Furthermore, according to the present embodiment, the use of the shutter 61 as the opening / closing means 27 makes it possible to easily deal with the space 23 having a large diameter, and is linked to the opening / closing operation of the opening / closing means 27 based on the control device 67. By switching the operation of supplying the inert gas N and stopping the supply of the inert gas N, it is possible to use the inert gas N more efficiently and without waste.

[Fifth Embodiment] (see FIG. 7)
The internal observation sight glass anti-fogging device 7E according to the fifth embodiment is different from the internal observation sight glass anti-fogging device 7A according to the first embodiment in that the valve element 39 of the hall valve 31 is used. Instead, the valve element 39E of the hall valve 31E (three-way valve) is used, and the valve element 39E has a T-shaped flow path that can be opened in three directions. Further, the anti-fogging device 7E replaces the gas introduction path 29 of the fluid gas shielding means 11 with respect to the anti-fogging device 7A for the internal observation sight glass according to the first embodiment, instead of the fluid gas shielding. As a means 11, a gas introduction path 29E integrated with the housing 25E is provided. The valve body 39E is a first through-hole 45E1 that can connect the sight glass 5 and the inside of the agitation processing device 3, and a first through-hole 45E1 that connects to the first through-hole 45E1 inside the valve body 39E and can be connected to the gas introduction path 29E. 2 through opening 45E2.

  At the time of internal observation shown in FIG. 7A, the valve element 39E connects the sight glass 5 and the inside of the stirring treatment device 3 through the first through-hole 45E1, and connects the gas introduction path 29E with the second through-hole 45E2. The first through hole 45E1 is connected. In this state, the inside of the agitation processing device 3 can be observed through the sight glass 5, and the inert gas N is supplied into the space 23 from the gas introduction path 29 </ b> E through the second through-hole 45 </ b> E <b> 2. Further, when not observed as shown in FIG. 7B, the valve body 39E rotates and the first through-hole 45E1 is blocked from the inside of the sight glass 5 and the stirring processing device 3, so that the inside of the stirring processing device 3 The gas generated from the gas does not flow into the surface of the sight glass 5.

The above is the basic embodiment of the present invention, but the anti-fogging device 7 for internal observation sight glass, the stirring treatment system 1 and the anti-fogging method for internal observation sight glass according to the present invention are described above. However, it is possible to change or omit the partial configuration without departing from the scope of the present invention.
For example, the opening / closing means 27 may be a valve of a screw type, a solenoid type or the like, or a cock, a damper, or the like can be used. Further, although only one set of the internal observation sight glass 5 and the anti-fogging device 7 of the present invention is provided in the illustrated embodiment, a plurality of sets may be provided for the single stirring processing device 3. Of course it is possible.

In addition, the ball valve 31 (31E) provided in the first or fifth embodiment is changed from a manual type to an electric type, and the control device 67 provided in the fourth embodiment is provided. It is also possible to automatically switch between supply of the inert gas N and stop of supply in conjunction with the opening / closing operation of the valve body 39 (39E) by the control device 67.
In addition, the internal observation sight glass anti-fogging device 7 of the present invention can be used in applications other than the agitation processing system 1, and can be applied to various devices including the internal observation sight glass 5. . Although not particularly limited, as examples of processing of the contents to which the sight glass anti-fogging device 7 for internal observation of the present invention can be applied, stirring processing, kneading processing, mixing processing, polymerization processing, storage processing, conveyance processing, heating Any one of these treatments, cooling treatments, pressurization treatments, decompression treatments, or any combination thereof may be included. In addition, a conveyance process is a process which conveys the content which generate | occur | produces gas, for example, conveyance and circulation with a pump, empty conveyance of the solid substance using a blower, and conveyance with a conveyor are included. In the case of the conveyance process, since the piping is a processing device, a sight glass is installed in the piping.
Further, although not particularly limited, as an example of a processing apparatus provided with the anti-fogging device 7 for internal observation sight glass of the present invention, a stirring (processing) apparatus, a kneading (processing) apparatus, a mixing (processing) apparatus, Polymerization (processing) device, storage (processing) device, transport (processing) device, heating (processing) device, cooling (processing) device, pressurizing (processing) device, decompression (processing) device, or any one form or It can be set as the form which combined these arbitrarily.

In addition, the processing apparatus which can be used for each embodiment of this invention and / or the generated gas which generate | occur | produces in the said processing apparatus are as follows.
(1) Polyacetal polymerization reactor:
After formaldehyde generated by thermal decomposition of unstable end groups in the raw material trioxane and the generated polyacetal resin is vaporized and attached to the sight glass, it becomes paraformaldehyde.
(2) Polyacetal resin extruder:
As already described in the embodiment, formaldehyde generated by thermal decomposition of unstable end groups in the polyacetal resin is vaporized and attached to the sight glass in the thermal stabilization step, and then becomes paraformaldehyde.
(3) Polycarbonate processing equipment:
When phenol vaporizes during polymerization and extrusion and adheres to sight glass, it solidifies and cannot be removed. It can be used in a step of proceeding polymerization while removing phenol under a reduced pressure atmosphere or a step of removing phenol remaining during extrusion.
(4) Polyethylene terephthalate and polybutylene terephthalate treatment equipment:
During polymerization and extrusion, terephthalic acid vaporizes and adheres to the sight glass and then solidifies.
(5) Formaldehyde synthesis reactor:
After the formaldehyde generated vaporizes and adheres to the sight glass, it becomes paraformaldehyde.
(6) Trioxane synthesis reactor:
The raw formaldehyde vaporizes and adheres to the sight glass, and then becomes paraformaldehyde.
(7) Polyamide processing equipment:
The raw material ε-caprolactam vaporizes and adheres to the sight glass during polymerization and extrusion, and then solidifies.
(8) Polylactic acid synthesis reactor:
At the time of polymerization and extrusion, the raw material lactic acid vaporizes and adheres to the sight glass and then solidifies.
(9) Polystyrene synthesis reactor:
At the time of polymerization and extrusion, the raw material styrene vaporizes and adheres to the sight glass and then solidifies.
(10) Methacrylic resin treatment device:
At the time of extrusion, the raw material methacrylate is vaporized and attached to the sight glass, and then polymerized.
The above (1) to (10) are exemplifications, and in the present invention, synthesis of a thermoplastic resin and an oligomer using a compound having a polymerizable property and a solidifying property as a raw material, and a gas having a polymerizable property and a solidifying property are provided. It can be used for the entire extrusion of generated thermoplastic resin. Furthermore, in each embodiment of the present invention, since an extruder is assumed, it has been described as a depressurization stirring apparatus. However, the present invention is not limited to a reduced pressure processing apparatus, and can also be applied to those using a pressurized reactor as a pressure processing apparatus (polyacetal polymerization reactor, trioxane synthesis reactor, etc.).

  The anti-fogging device for sight glass for internal observation of the present invention, the processing system, and the anti-fogging method for sight glass for internal observation can be used in the production, use field, etc. of the stirring treatment system equipped with the sight glass for internal observation, In particular, the present invention has applicability when it is desired to reliably prevent fogging of the internal observation sight glass due to contact with the generated gas generated during the stirring and kneading process by using an inert gas that is efficient and wasteful.

DESCRIPTION OF SYMBOLS 1 Stir processing system 3 Stir processing apparatus 5 Sight glass 7 for internal observation The fog prevention apparatus 9 (of the sight glass for internal observation) Mechanical gas shielding means 11 Fluid gas shielding means 13 Stirring blade 15 Generated gas processing equipment 17 Exhaust port 19 Mounting opening 21 Mounting base 23 Space 25 Housing 27 Opening and closing means 29 Gas introduction path 31 Ball valve 33 Flange part 35 Flange part 37 Rotating shaft 39 Valve body 41 Operation handle 43 Engagement hole 45 Through-hole 47 Packing 49 Packing 51 Packing 51 Opening 53 Inner exposed surface 54 Outer peripheral portion 55 Screw 57 Driving device 59 Die 61 Shutter 63 Shutter plate 65 Driving means 67 Control device A Contents L Liquid level G Generated gas N Inert gas M Motor Z Axial direction Y Crossing direction

Claims (13)

A sight glass anti-fogging device provided for observing the state of contents in the processing device,
Provided on a path connecting the processing apparatus and the sight glass, a space used as a flow path when observing the state of contents in the processing apparatus or introducing an inert gas is formed inside. A mechanical gas shielding means comprising: a housing, and an opening / closing means for switching between permission and regulation of inflow / outflow of gas flowing through the space;
A gas introduction path for introducing an inert gas into the space is provided, and the generated gas generated in the processing apparatus is prevented from contacting the sight glass by using a flow of the inert gas introduced from the gas introduction path. fluidly gas blocking means and comprises a
The switching means is a three-way valve capable of three-way open state, the three-way valve is anti-fogging device of the sight glass, characterized in Rukoto connected to the gas introducing path in the three-way open state. In the sight glass anti-fogging device according to claim 1,
The anti-fogging device for sight glass, wherein the opening / closing means is a ball valve. In the sight glass anti-fogging device according to claim 1,
The anti-fogging device for sight glass, wherein the opening / closing means is a slide type shutter. In the anti-fogging device for sight glass according to any one of claims 1 to 3,
An opening portion formed in a connection portion between the gas introduction path and the space is formed along the outer peripheral portion of the inner exposed surface of the sight glass. In the anti-fogging device for sight glass according to any one of claims 1 to 4 ,
The anti-fogging device for sight glass, wherein the gas introduction path is a gas introduction path having an opening in the housing or a through-hole penetrating the housing. The anti-fogging device for sight glass according to any one of claims 1 to 4 , wherein the content is polycarbonate, polyacetal, polyethylene terephthalate, polybutylene terephthalate, polyamide, polylactic acid, polystyrene, acrylic resin, and methacrylic resin. A sight glass anti-fogging device comprising at least one thermoplastic resin selected from the group consisting of: The anti-fogging device for sight glass according to any one of claims 1 to 4 , wherein the content is polycarbonate, polyacetal, polyethylene terephthalate, polybutylene terephthalate, polyamide, polylactic acid, polystyrene, acrylic resin, and methacrylic resin. A sight glass anti-fogging device comprising an oligomer of at least one thermoplastic resin selected from the group consisting of: The anti-fogging device for sight glass according to any one of claims 1 to 4 , wherein the gas generated from the contents is phenol, formaldehyde, trioxane, terephthalic acid, ε-caprolactam, lactic acid, styrene, or an acrylate ester. A sight glass anti-fogging device comprising at least one selected from methacrylic acid esters. In the anti-fogging device for sight glass according to any one of claims 1 to 8 ,
The anti-fogging device for sight glass, wherein the inert gas is composed of at least one inert gas selected from nitrogen, helium, and argon. A processing device for storing contents and processing the contents;
Sight glass provided for observing the state of the contents in the processing apparatus;
A processing system comprising a sight glass anti-fogging device provided on a path connecting the processing device and the sight glass,
The sight glass anti-fogging device has a housing in which a space used as a flow path for observing the contents of the processing device or introducing an inert gas is formed. Mechanical gas shielding means comprising: opening and closing means for switching between permitting and regulating gas inflow / outflow;
A gas introduction path for introducing an inert gas into the space is provided, and the generated gas generated in the processing apparatus is prevented from contacting the sight glass by using a flow of the inert gas introduced from the gas introduction path. fluidly gas blocking means and comprises a
Processing system the switching means is a three-way open state is a three-way valve capable of, the three-way valve, characterized in Rukoto connected to the gas introducing path in the three-way open state. The processing system according to claim 10 ,
The processing apparatus is a vertical processing apparatus that uses a thermoplastic resin and / or an oligomer of a thermoplastic resin as a content, and can process the thermoplastic resin and / or the oligomer of the thermoplastic resin. A processing system characterized by that. The processing system according to claim 10 ,
The processing apparatus is a horizontal processing apparatus that uses a thermoplastic resin and / or an oligomer of a thermoplastic resin as a content, and can process the thermoplastic resin and / or the oligomer of the thermoplastic resin. A processing system characterized by It is provided on the path connecting the content processing device and the sight glass, and the space used as a flow path when observing the state of the content in the processing device or introducing an inert gas is formed inside. A mechanical gas shielding means comprising: a housing, and an opening / closing means for switching between permission and regulation of inflow / outflow of gas flowing through the space;
A gas introduction path for introducing an inert gas into the space is provided, and the generated gas generated in the processing apparatus is prevented from contacting the sight glass by using a flow of the inert gas introduced from the gas introduction path. A sight glass fogging prevention method using a sight glass fog prevention device comprising a fluid gas shielding means,
When observing the inside of the processing apparatus from the sight glass, the inside of the processing apparatus can be observed by opening the opening / closing means, and the fluid gas shielding means is activated by introducing an inert gas. Preventing the generated gas generated in the processing apparatus from contacting the sight glass,
On the other hand, except when the observation is so as to prevent the contact with respect to the sight glass of the generated gas generated in the processing device by actuating the mechanical gas blocking means said switching means in the closed ,
The method for preventing fogging of sight glass, wherein the opening / closing means is a three-way valve capable of a three-way open state, and the three-way valve is connected to the gas introduction passage in the three-way open state .

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