JP2014231054A - Exhaust gas processing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent air contamination caused by exhaust gas discharged from a vulcanization furnace or a lateral drawing machine, for reusing waste-heat efficiently.SOLUTION: The exhaust gas processing system comprises: a vulcanizer including one or more vulcanization furnaces; and an exhaust gas processing device. The exhaust gas processing device comprises: an exhaust gas intake part for taking in exhaust gas of 150 to 250°C from the vulcanizer; a filtration filter for accumulating diatom earth powder and zeolite powder for use for removing tar included in the exhaust gas taken in from the exhaust gas intake part; and a feeding part of gas after filtration for feeding the exhaust gas filtered by the filtration filter, namely gas after filtration to the vulcanization furnace.

Description

  The present invention relates to an exhaust gas treatment system for removing tar contained in exhaust gas discharged from a vulcanizing apparatus and a vinyl film manufacturing apparatus and effectively reusing the removed gas.

  In the production process of rubber and the like, vulcanization is performed in which sulfur is blended and the rubber is heated to cause a crosslinking reaction in order to obtain elasticity and strength. This vulcanization is performed in a vulcanization furnace in a vulcanizer, and a reaction gas is generated in this process. If this reaction gas is discharged from the vulcanizer as exhaust gas as it is, various problems arise.

  FIG. 6 is a conceptual diagram showing a conventional example of a vulcanizing apparatus for performing vulcanization. As shown in the figure, the vulcanizing device 0600 includes a vulcanizing furnace 0601, a heater 0602, and a fan 0603, and the outside air taken in by the fan is heated by the heater and sent to the vulcanizing furnace as hot air. This hot air brings the inside of the vulcanizing furnace to a high temperature state and vulcanization is performed. The reaction gas generated by vulcanization is directly discharged out of the vulcanization furnace as exhaust gas 0604 by driving the fan. The reason why the fan is positioned upstream of the air flow is to prevent the fan from being contaminated by the reaction gas.

  The problem is that tar is contained in the exhaust gas. First, when such exhaust gas is discharged as it is, the air is contaminated. In addition, tar adhered to the inside of the vulcanizer or the discharge pipe may ignite and cause a fire.

  There is also a problem from the viewpoint of effective use of heat. That is, since the exhaust gas having a sufficient amount of heat is discharged into the atmosphere as it is, the heat is not reused. Here, when the exhaust gas is recirculated as it is to the fan or the like, the following problems arise in addition to the deterioration of the quality of the rubber. For example, gas containing tar may be introduced into a fan or the like, thereby hindering the operation of the fan or causing ignition. In order to solve this problem, it is conceivable to introduce clean outside air heated through a heat exchanger into the fan without introducing it directly into the fan. On the other hand, the heat exchanger is contaminated by tar in the exhaust gas and is heated. Problems such as lowering the exchange rate or making it unusable occur. These problems also exist in a vinyl film manufacturing apparatus that generates an exhaust gas containing tar as in the vulcanizing apparatus.

  Regarding the discharge of the reaction gas containing tar causing various problems as described above, for example, Patent Document 1 discloses that the reaction gas containing tar generated in a vulcanization furnace is in gas-liquid contact with a digestible liquid (water or the like). A method of exhausting a vulcanizing device that prevents ignition by causing it to occur is disclosed.

JP 2002-103341 A

  The exhaust method of Patent Document 1 can solve the problem of ignition and fire caused by the reaction gas containing tar. However, the problems of air pollution prevention and effective reuse of exhaust heat have not been solved.

  Therefore, in order to solve the above problems, the present invention provides the following exhaust gas treatment system. That is, an exhaust gas treatment system comprising a vulcanizer having one or more vulcanization furnaces and an exhaust gas treatment device, wherein the exhaust gas treatment device takes in an exhaust gas of 150 to 250 ° C. from the vulcanizer. And a filtration filter used by depositing diatomaceous earth powder and zeolite powder to remove tar in the exhaust gas taken from the exhaust gas intake section, and the filtered gas that has been filtered by the filter filter to the vulcanization furnace There is provided an exhaust gas treatment system comprising an exhaust gas treatment device having a post-filtering gas delivery part for delivery.

  An exhaust gas treatment system comprising a vulcanizer having one or more vulcanization furnaces, a heat exchanger for sending gas to the vulcanizer, and an exhaust gas treatment device, the exhaust gas treatment device comprising: An exhaust gas intake part for taking in an exhaust gas at 150 to 250 ° C., a filtration filter used by depositing diatomaceous earth powder and zeolite powder to remove tar in the exhaust gas taken from the exhaust gas intake part, and filtering with a filtration filter An exhaust gas treatment apparatus comprising: an exhaust gas treatment device having a post-heat exchange gas delivery unit for passing the filtered exhaust gas, which is already exhausted gas, through a heat exchanger, and delivering outside air heated by the heat exchanger to a vulcanization furnace Provide a system.

  Moreover, it provides any one of the above-mentioned configurations, and further provides the exhaust gas treatment system in which the zeolite powder has a smaller particle size than the diatomaceous earth powder. In addition, in the case where the above configuration is provided and the filtration filter is a spring filter, the diatomaceous earth powder is supplied first, and the zeolite powder is supplied after the supplied diatomaceous earth powder is deposited on the surface of the spring filter. An exhaust gas treatment system is provided. In addition, the exhaust gas treatment system includes any one of the above configurations, and further provides the exhaust gas treatment system having a wiping unit for wiping the diatomaceous earth powder and the zeolite powder deposited on the filter.

  An exhaust gas treatment system comprising a vinyl film production apparatus having one or more transverse stretching machines and an exhaust gas treatment apparatus, wherein the exhaust gas treatment apparatus takes in an exhaust gas of 150 to 250 ° C. from the vinyl film production apparatus. Intake section, filtration filter used by depositing diatomaceous earth powder and zeolite powder to remove tar in the exhaust gas taken from the exhaust gas intake section, and laterally stretched filtered gas that is exhaust gas filtered by the filter An exhaust gas treatment system comprising an exhaust gas treatment device having a post-filtration gas delivery part for delivery to a machine.

  An exhaust gas treatment system comprising a vinyl film production apparatus having one or more transverse stretching machines and an exhaust gas treatment apparatus, wherein the exhaust gas treatment apparatus takes in an exhaust gas of 150 to 250 ° C. from the vinyl film production apparatus. Heat exchange between the intake section, a filter used by depositing diatomaceous earth powder and zeolite powder to remove tar in the exhaust gas taken from the exhaust gas intake section, and the filtered gas that has been filtered by the filter filter An exhaust gas treatment system comprising an exhaust gas treatment device having a post-heat exchange gas delivery section for delivering outside air heated by a heat exchanger to a transverse stretching machine through a container.

  Moreover, it provides any one of the above-mentioned configurations, and further provides the exhaust gas treatment system in which the zeolite powder has a smaller particle size than the diatomaceous earth powder. In addition, in the case where the above configuration is provided and the filtration filter is a spring filter, the diatomaceous earth powder is supplied first, and the zeolite powder is supplied after the supplied diatomaceous earth powder is deposited on the surface of the spring filter. An exhaust gas treatment system is provided. In addition, the exhaust gas treatment system includes any one of the above configurations, and further provides the exhaust gas treatment system having a wiping unit for wiping the diatomaceous earth powder and the zeolite powder deposited on the filter.

  According to the present invention, it is possible to provide an exhaust gas treatment system capable of effectively reusing the removed gas by removing the tar component contained in the exhaust gas.

1 is a conceptual diagram illustrating an example of an exhaust gas treatment system according to a first embodiment. 1 is a conceptual diagram showing an example of an exhaust gas treatment apparatus of Embodiment 1. FIG. The conceptual diagram which shows the other example of the waste gas processing system of Embodiment 1. The conceptual diagram which shows the other example of the waste gas processing system of Embodiment 1. A conceptual diagram showing an example of an exhaust gas treatment system of Embodiment 2 Conceptual diagram showing a conventional example of a vulcanization system mainly composed of a vulcanizer

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, this invention should not be limited to these embodiments at all, and can be implemented in various modes without departing from the gist thereof.

The first embodiment mainly relates to claims 1 to 6 and the like. The second embodiment mainly relates to claims 7 to 12 and the like.
<Embodiment 1>
<Summary of Embodiment 1>

The exhaust gas treatment system according to the present embodiment is a system including an exhaust gas treatment device for removing tar in the exhaust gas taken from the vulcanization device with a filter and sending the filtered gas to the vulcanization furnace again. By this exhaust gas treatment system, air pollution can be prevented and the gas after tar removal can be effectively reused.
<Configuration of Embodiment 1>

  The present embodiment is an exhaust gas treatment system including a vulcanizer and an exhaust gas treatment device. FIG. 1 is a conceptual diagram showing an example of an exhaust gas treatment system of the present embodiment. As shown in the figure, the exhaust gas treatment system 0100 includes a vulcanizing device 0101 and an exhaust gas treatment device 0105.

  The vulcanizer 0101 includes one or more vulcanizers 0103, and the vulcanizer is provided with a heating device such as a heater 0102. The gas sent out from the fan 0104 is heated by a heater to become hot air and sent out to the vulcanizing furnace.

  The fan 0104 is an element that constitutes a vulcanizing device in order to send hot air to the vulcanizing furnace, and is also an element that circulates gas between the devices constituting the exhaust gas treatment system. Therefore, in the exhaust gas treatment system of the present embodiment, the fan may be an element constituting the vulcanization device, or constitute the exhaust gas treatment system together with the vulcanization device and the exhaust gas treatment device as a configuration independent of the vulcanization device. It may be an element. A blower may be used instead of the fan. A fan and a blower are distinguished by a difference in compression ratio, but both perform a blowing function.

  The vulcanization furnace is a furnace for heating and vulcanizing an unfinished rubber product placed or conveyed in the furnace. Vulcanization refers to causing a cross-linking reaction by mixing and heating sulfur. However, vulcanization includes a cross-linking reaction using a peroxide other than sulfur. The vulcanizing apparatus is an apparatus for vulcanizing an unfinished rubber product, and can be realized by a known technique in the field, and does not limit a specific aspect of the vulcanizing apparatus. Note that the heater may be a burner or the like as long as it can heat air.

  In addition, tar is by-produced together with the reaction gas when the organic compound is thermally decomposed, and is mainly composed of aromatic hydrocarbons. Even during vulcanization, tar is generated by heating and thermally decomposing unfinished rubber.

  FIG. 2 is a conceptual diagram illustrating an example of an exhaust gas treatment apparatus according to the present embodiment. The exhaust gas treatment device 0200 takes in the exhaust gas 0202 from the exhaust gas intake unit 0201, removes tar in the exhaust gas by the filter 0208 provided in the filter 0207, and sends the filtered gas 0204 to the vulcanization furnace. The exhaust gas is taken into the vulcanization furnace by the fan 0203 blowing function.

  The temperature of the exhaust gas taken into the exhaust gas treatment device is preferably about 150 to 250 ° C. That is, when the temperature is lower than this range, tar may be liquefied and the filtration efficiency may be lowered, and when the temperature is higher, the filter may be burnt. In order to set the exhaust gas to be taken into a preferable temperature, a heating device or a cooling device may be provided.

  In the filtration, diatomaceous earth powder and zeolite powder are deposited on the surface of the filter as a filter aid 0206. The filter aid is supplied from a filter aid feeder 0205, is introduced into the filter by driving the fan, and is deposited on the surface of the filter. Examples of the filter include a bag filter using a woven fabric or a non-woven fabric as a filter medium, and a spring filter that performs filtration through a gap between coil springs.

  The spring type filter is a filter that performs filtration using a gap between spiral coil springs. By depositing a filter aid such as diatomaceous earth powder on the outside of the coil spring and sucking the exhaust gas from the outside to the inside of the coil spring, the filter aid can adsorb tar and obtain a gas after filtration. The coil spring is formed of a metal such as stainless steel or a resin. In particular, a spring-type filter using a metal coil spring is more advantageous than a bag filter using a filter cloth in that filtration can be performed at a high temperature exceeding 250 ° C.

  Diatomaceous earth is a fossil of diatom shell and is a porous material having pores of 0.1 to 1.0 μm. As filter aid, diatomaceous earth powder having an average particle size of 10.0 μm to 50.0 μm is preferably used. Zeolite is a porous material having a relatively large void in the crystal structure among aluminosilicates, and is a porous material having pores of 0.2 to 1.0 nm. As a filter aid, the average particle size is 1.0 μm to A 5.0 μm zeolite powder is preferred. Artificial zeolite powder may be used. As described above, the zeolite powder preferably has a smaller particle size than the diatomaceous earth powder.

  Diatomaceous earth powder retains the zeolite powder and prevents clogging and contamination of the filter to increase the effective filtration area. In addition, it is easy to deposit on the filter because of its low specific gravity. Moreover, since it is excellent in peelability, maintenance such as cleaning of the bag filter is facilitated. Moreover, the zeolite powder exhibits excellent tar adsorption performance due to fine pores. Diatomaceous earth powder and zeolite powder are listed as particularly suitable filter aids, and perlite, cellulose, activated carbon, activated coke, alumina, and the like may be used.

  When using a spring type filter for the filter, it is preferable to supply the zeolite powder after first supplying the diatomaceous earth powder and depositing it on the spring type filter. This is because if zeolite powder having a smaller particle size is supplied first, it may pass through the gap of the spring or cause clogging.

  The exhaust gas is taken into the filter in a state where diatomaceous earth powder and zeolite powder are deposited on the filter. The exhaust gas is filtered by adsorbing the tar in the exhaust gas to the zeolite powder and diatomaceous earth powder deposited on the filter. Then, the filtered gas, which has been filtered, is sent to the vulcanization furnace by driving the fan. It should be noted that sending to the vulcanizing furnace does not only mean sending directly to the vulcanizing furnace, for example, via a predetermined conduction path for measuring the temperature of the gas after filtration in the vulcanizing apparatus. It also means indirect delivery such as later introduced into the vulcanization.

  Here, the exhaust gas intake part and the filtered gas delivery part are composed of a gas conduction path constituted by pipes, joints, etc., an intake for taking in the exhaust gas, a delivery outlet for sending the filtered gas, etc. However, it may further include a fan for refluxing the gas in the conduction path. From the viewpoint of preventing the fan from being contaminated by tar in the exhaust gas, it is preferable to include a fan on the post-filtering gas delivery part side.

  The exhaust gas treatment apparatus may further include a wiping unit for wiping the diatomaceous earth powder and the zeolite powder deposited on the filter. In FIG. 2, the compressed air supplied from the compressed air tank 0210 and the compressed air tank is injected toward the inner side of the filter, that is, the surface opposite to the surface on which the diatomaceous earth powder is deposited on the filter cloth. The wiping portion is constituted by the injection nozzle 0209 that performs the above operation.

  When the fan is stopped and compressed air is injected from the injection nozzle, the diatomaceous earth powder and zeolite powder deposited on the filter are wiped off together with the adsorbed tar, and are recovered, for example, in the recovery container 0211. By wiping off diatomaceous earth powder and the like subjected to filtration and depositing unused diatomaceous earth powder and the like again on the filtration filter, the filtration efficiency can be maintained satisfactorily. Note that the wiping unit may use compressed air as described above, or may apply an impact to the filtration filter using power such as a motor. The wiping portion is also effective in the spring type filter. The filter aid and the like that have been deposited are wiped off by injecting compressed air from the inside of the spring filter. Moreover, the filter aid etc. which accumulated in the gap can be wiped by applying a force so as to widen the gap of the spring.

  As described above, the exhaust gas sent from the vulcanizer is removed from the tar by the exhaust gas treatment device and sent again to the vulcanization furnace. Therefore, the exhaust gas containing tar is not directly discharged to the outside (in the atmosphere) and does not cause air pollution. Further, since the filtered gas filtered at a high temperature can be sent to the vulcanizing furnace, the energy consumption of the heater can be reduced.

  Also, the filtered gas discharged from the exhaust gas treatment device is not sent to the vulcanizing furnace as it is, but the filtered gas is passed through the heat exchanger and the outside air heated by the heat exchanger is sent to the vulcanizing furnace. You may do it.

  FIG. 3 is a conceptual diagram showing an example of an exhaust gas treatment system including a heat exchanger. As shown in the figure, in the exhaust gas treatment system 0300, the filtered gas discharged from the exhaust gas treatment device 0304 is passed through a heat exchanger 0305 and then discharged 0306. The outside air 0307 taken in by the fan 0303 passes through the heat exchanger, obtains the heat of the gas after filtration, and is sent to the vulcanization furnace 0302 of the vulcanizer 0301.

  If the gas is continuously refluxed without using a heat exchanger, the composition ratios of nitrogen and oxygen in the gas will change and the concentration of harmful gases such as carbon monoxide will increase, which will adversely affect people near the exhaust gas treatment system. There is a case. By always taking in outside air using a heat exchanger, it is possible to prevent the above-described adverse effects from occurring.

  Further, the exhaust gas treatment device may be configured to include a heat exchanger. That is, the exhaust gas treatment apparatus passes the filtered gas, which is the exhaust gas filtered by the filter, through the heat exchanger, and sends the gas after the heat exchange for sending the outside air heated by the heat exchanger to the vulcanizing furnace. It is good also as a structure which has a part. The exhaust gas treatment system in this case is shown in FIG.

As shown in the figure, this exhaust gas treatment system 0400 filters the exhaust gas discharged from the vulcanization furnace 0402 of the vulcanizer 0401 with the exhaust gas treatment device 0404, and passes the filtered gas to the heat exchanger 0405 provided in the exhaust gas treatment device. After discharging, discharge 0406 is performed. The outside air 0407 taken in by the fan 0403 is heated by the heat exchanger and sent to the vulcanization furnace.
<Embodiment 1 effect>

The exhaust gas treatment system of this embodiment can prevent air pollution and effectively reuse the gas after tar removal.
<Embodiment 2>
<Overview of Embodiment 2>

The exhaust gas treatment system of this embodiment and the exhaust gas treatment system of Embodiment 1 are applied to the production of vinyl film.
<Embodiment 2 configuration>

  FIG. 5 is a conceptual diagram showing an example of the exhaust gas treatment system of the present embodiment. As shown in the figure, the exhaust gas treatment system 0500 includes a vinyl film manufacturing apparatus 0501 and an exhaust gas treatment apparatus 0505. The fan 0504 for refluxing the gas is a component included in the vinyl film manufacturing apparatus. However, the fan 0504 may be a component independent of the vinyl film manufacturing apparatus. It is the same.

  The exhaust gas treatment device is the same as the exhaust gas treatment device in Embodiment 1 except that the exhaust gas discharged from the vinyl production device is taken in and the filtered gas is sent to the transverse stretching machine of the vinyl production device. Description of is omitted.

  The vinyl film manufacturing apparatus 0501 is provided with one or more transverse stretching machines 0503 and heating devices such as a heater 0502. The transverse stretching machine is an apparatus for performing one of the processes for producing a vinyl film, and is an apparatus for stretching in the lateral direction after the longitudinal stretching process of stretching the original film of the vinyl film in the longitudinal direction. .

  The vinyl film does not mean only a polyvinyl chloride film but also includes a plastic film made of a thermoplastic resin such as polyethylene, polypropylene, polyester, and polystyrene.

  The transverse stretching process is a process in which the original film of the vinyl film that has undergone longitudinal stretching is stretched by being pulled in the transverse direction while being heated in a furnace. By this heating, the resin which is an organic substance is thermally decomposed, and a reaction gas containing tar is generated as in the vulcanization process.

  Regarding the discharge of the reaction gas containing tar generated in the transverse stretching process, the same problem as in the vulcanizing apparatus is caused, and the exhaust gas generated in the lateral stretching process is taken in by the exhaust gas treatment apparatus described in the first embodiment and filtered. By doing so, air pollution is prevented and effective reuse of exhaust gas is realized.

The exhaust gas taken into the exhaust gas treatment apparatus is removed from the tar by a filtration filter to become a gas after filtration. After filtration, the gas is sent to a transverse stretcher or is effectively reused by warming the outside air with a heat exchanger.
<Embodiment 2 effect>

  By the exhaust gas treatment system of the present embodiment, tar in the exhaust gas discharged from the lateral stretching machine of the vinyl film manufacturing apparatus can be removed, and a post-filtered gas that can be effectively reused can be obtained.

0100 Exhaust gas treatment system 0101 Vulcanization device 0102 Heater 0103 Vulcanization furnace 0104 Fan 0105 Exhaust gas treatment device

Claims (12)

A vulcanizer equipped with one or more vulcanization furnaces;
An exhaust gas treatment system comprising an exhaust gas treatment device,
Exhaust gas treatment equipment
An exhaust gas intake section for taking in an exhaust gas of 150 to 250 ° C. from a vulcanizer;
A filtration filter that deposits and uses diatomaceous earth powder and zeolite powder to remove tar in the exhaust gas taken from the exhaust gas intake;
An exhaust gas treatment apparatus having a post-filtering gas sending part for sending the post-filtered gas that has been filtered by a filter to the vulcanizing furnace;
An exhaust gas treatment system consisting of A vulcanizer equipped with one or more vulcanization furnaces;
A heat exchanger that delivers gas to the vulcanizer;
An exhaust gas treatment system comprising an exhaust gas treatment device,
Exhaust gas treatment equipment
An exhaust gas intake section for taking in an exhaust gas of 150 to 250 ° C. from a vulcanizer;
A filtration filter that deposits and uses diatomaceous earth powder and zeolite powder to remove tar in the exhaust gas taken from the exhaust gas intake;
An exhaust gas treatment apparatus having a gas exchange section after heat exchange for passing the filtered gas, which is exhaust gas filtered by the filter, through the heat exchanger, and sending outside air heated by the heat exchanger to the vulcanization furnace; An exhaust gas treatment system consisting of   The exhaust gas treatment system according to claim 1 or 2, wherein the zeolite powder has a particle size smaller than that of the diatomaceous earth powder.   The exhaust gas treatment system according to any one of claims 1 to 3, wherein the filtration filter is a bag filter or / and a spring filter.   The exhaust gas treatment according to claim 4, wherein when the filtration filter is a spring filter, the diatomaceous earth powder is supplied first, and the zeolite powder is supplied after the supplied diatomaceous earth powder is deposited on the surface of the spring filter. system.   The exhaust gas treatment system according to any one of claims 1 to 5, wherein the exhaust gas treatment device includes a wiping unit for wiping the diatomaceous earth powder and the zeolite powder deposited on a filtration filter. A vinyl film manufacturing apparatus equipped with one or more transverse stretching machines;
An exhaust gas treatment system comprising an exhaust gas treatment device,
The exhaust gas treatment device comprises:
An exhaust gas intake section for taking in an exhaust gas of 150 to 250 ° C. from a vinyl film manufacturing apparatus;
A filtration filter that deposits and uses diatomaceous earth powder and zeolite powder to remove tar in the exhaust gas taken from the exhaust gas intake;
An exhaust gas treatment apparatus having a post-filtering gas delivery unit for sending a post-filtered gas that has been filtered by a filtration filter to a transverse stretching machine;
An exhaust gas treatment system consisting of A vinyl film manufacturing apparatus equipped with one or more transverse stretching machines;
An exhaust gas treatment system comprising an exhaust gas treatment device,
The exhaust gas treatment device comprises:
An exhaust gas intake section for taking in an exhaust gas of 150 to 250 ° C. from a vinyl film manufacturing apparatus;
A filtration filter that deposits and uses diatomaceous earth powder and zeolite powder to remove tar in the exhaust gas taken from the exhaust gas intake;
An exhaust gas treatment apparatus having a gas exchange section after heat exchange for passing the filtered gas, which is exhaust gas filtered by a filtration filter, through a heat exchanger, and sending outside air heated by the heat exchanger to a transverse stretching machine; ,
An exhaust gas treatment system consisting of   The exhaust gas treatment system according to claim 7 or 8, wherein the zeolite powder has a particle size smaller than that of the diatomaceous earth powder.   The exhaust gas treatment system according to any one of claims 7 to 9, wherein the filtration filter is a bag filter or / and a spring filter.   The exhaust gas treatment according to claim 10, wherein when the filtration filter is a spring filter, the diatomaceous earth powder is supplied first, and the zeolite powder is supplied after the supplied diatomaceous earth powder is deposited on the surface of the spring filter. system.   The exhaust gas treatment system according to any one of claims 7 to 11, wherein the exhaust gas treatment device includes a wiping unit for wiping the diatomaceous earth powder and the zeolite powder deposited on a filtration filter.

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