JP5155088B2 - Method for treating synthetic resin foam containing fluorocarbon or fluorocarbon-like substance - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a method for treating a synthetic resin foam containing chlorofluorocarbon or a chlorofluorocarbon-like substance. The present invention relates to a method for treating synthetic resin foams such as urethane foam and styrene foam.

  Conventionally, synthetic resin foams such as urethane foam and styrene foam have been mainly used as heat insulating materials for home appliances such as refrigerators or heat insulating materials for building materials. In particular, urethane resins have been widely used because they can be foamed in situ. Many of these constitute closed cells, and as a foaming agent for forming bubbles, Freon having good foamability and low thermal conductivity has been used, and excellent heat insulating foams have been constructed.

  However, since the production of fluorocarbons was completely abolished in 1996 due to global environmental problems such as ozone depletion and global warming, an alternative fluorocarbon foaming agent has been studied. As an alternative chlorofluorocarbon blowing agent, chlorofluorocarbon-like substances such as HCFC and HFC are used. However, there is still a possibility that the HCFC may be depleted of the ozone layer, etc., and it is decided to abolish production in principle by 2020. In addition, although HFC has no danger of destruction of the ozone layer, the global warming potential is as large as 140 to 11700 (carbon dioxide = 1), and its emission suppression is an important issue.

  Here, in order to prevent ozone layer destruction and global warming, it is not enough to stop the production of chlorofluorocarbon or chlorofluorocarbon-like substances, and it contains a large amount of chlorofluorocarbon or chlorofluorocarbon-like substances that have been produced and used so far. The treatment for detoxifying the synthetic resin foam is essential. In other words, when a synthetic resin foam containing fluorocarbons or fluorocarbon-like substances as a foaming agent is disposed of in landfills, fluorocarbons or fluorocarbon-like substances are released into the atmosphere over time, leading to ozone layer destruction and global warming. It becomes. Therefore, techniques and institutionalization for completely decomposing waste of synthetic resin foams containing chlorofluorocarbon or chlorofluorocarbon-like substances as foaming agents are being studied.

Several methods have been proposed for treating chlorofluorocarbons contained in these synthetic resin foams.
For example, Patent Document 1 discloses a technique for condensing and recovering a foaming agent from a synthetic resin foam. Patent Document 2 discloses a method of separating a foamed urethane resin from urethane by dry distillation as a method for recovering chlorofluorocarbons contained in the foamed urethane resin. However, these techniques are only related to a method for recovering chlorofluorocarbons and do not indicate any method for decomposing the recovered chlorofluorocarbons. In addition, it takes considerable time and energy to completely separate and recover chlorofluorocarbon from the synthetic resin foam, and there is a problem that the efficiency is poor.

  As for the decomposition treatment method for chlorofluorocarbon, for example, Patent Document 3 discloses a technique for decomposition by plasma discharge, and Patent Document 4 discloses a technique for decomposition by a catalytic method. However, these techniques are only related to a method for decomposing chlorofluorocarbons after they are collected, and no treatment method including separation of chlorofluorocarbons from solid waste, that is, synthetic resin foam has been shown. Therefore, when the chlorofluorocarbon contained in the waste is decomposed by a simple combination of these prior arts, there is a problem that the energy required for recovery of the chlorofluorocarbon is required and the processing cost increases.

  On the other hand, Patent Document 5 discloses a system for recovering chlorofluorocarbons from urethane foam and destroying the recovered chlorofluorocarbons. In such a chlorofluorocarbon destruction treatment system, a heat insulating material containing urethane foam is crushed in a crusher, and chlorofluorocarbon gas and / or flammable gas generated at that time is sucked together with air, and the chlorofluorocarbon gas and / or flammable gas is collected. And the air are sent to an incinerator containing at least 10% by weight of a hydrocarbon compound and the temperature of the exhaust gas is 850 ° C. to 1000 ° C., thereby destroying and burning the Freon gas and the combustible gas.

Japanese Patent Laid-Open No. 3-500857 JP-A-8-229539 JP-A-4-279179 JP-A-4-313344 JP 2003-302031 A

  However, in the system disclosed in Patent Document 5, since the fluorocarbon is separated by crushing, the urethane foam must be crushed to a considerable particle size, and the crushing cost increases. In addition, the finely pulverized urethane powder has a high risk of dust explosion, and when a flammable gas is used for urethane foam, the risk of explosion is further increased. Furthermore, some chlorofluorocarbons or chlorofluorocarbon-like substances have a boiling point lower than room temperature, and it is considered impossible to separate the entire amount of chlorofluorocarbon existing in the urethane foam by simply crushing it. However, the treatment of foamed urethane in which chlorofluorocarbon remains is not disclosed at all in Patent Document 5, and treatment of crushed foamed urethane is a problem. Moreover, the synthetic resin foams, such as crushed urethane foam, have a problem that the bulk density is low and is difficult to convey as it is.

  The present invention has been made in view of the actual circumstances of the background art described above, and its purpose is to release a synthetic resin foam containing CFCs or CFC-like substances and CFC or CFC-like substances into the atmosphere. It is an object of the present invention to propose a method for treating a synthetic resin foam containing a fluorocarbon or a fluorocarbon-like substance that can be reliably decomposed without causing the thermal energy of the synthetic resin foam to be used effectively as a resource.

In order to achieve the above-described object, the present invention provides a method for treating a synthetic resin foam containing the following [1] to [6] chlorofluorocarbon or chlorofluorocarbon-like substances.
[1] A synthetic resin foam containing chlorofluorocarbon or a fluorocarbon-like substance is crushed, and the crushed synthetic resin foam and liquid fuel are mixed and pulverized to form a slurry-like fuel in which the synthetic resin foam is suspended. Fluorocarbon or chlorofluorocarbon-like substances generated during the production of the fuel are sucked and the sucked gas is introduced into the firing furnace as combustion air for cement firing, and the produced slurry fuel is supplied to the firing furnace as an auxiliary fuel for cement firing. A method for treating a synthetic resin foam containing chlorofluorocarbon or a chlorofluorocarbon-like substance.
[2] A synthetic resin foam containing chlorofluorocarbon or a fluorocarbon-like substance is crushed, and the crushed synthetic resin foam and liquid fuel are mixed to form a slurry-like fuel in which the synthetic resin foam is suspended. Fluorocarbons or chlorofluorocarbon-like substances generated during fuel production are sucked and the suction gas is introduced into the firing furnace as combustion air for cement firing, and the produced slurry fuel is input to the firing furnace as auxiliary fuel for cement firing. A method for treating a synthetic resin foam containing a fluorocarbon or fluorocarbon-like substance.
[3] Mixing and pulverizing the crushed synthetic resin foam and liquid fuel so that the average particle size of the synthetic resin foam in the slurry-like fuel is 0.1 mm or more and 3 mm or less, or chlorofluorocarbon or chlorofluorocarbon-like The method for treating a synthetic resin foam containing a fluorocarbon or a fluorocarbon-like substance according to the above [1] or [2], wherein the synthetic resin foam containing the substance is crushed.
[4] Mixing and pulverization of the crushed synthetic resin foam and liquid fuel, or mixing of the crushed synthetic resin foam and liquid fuel with respect to 100 parts by weight of liquid fuel results in 1 to 20 weights of synthetic resin foam. The method for treating a synthetic resin foam containing chlorofluorocarbon or chlorofluorocarbon-like substance according to any one of the above [1] to [3], wherein
[5] The Freon or Freon-like substance according to any one of [1] to [4], wherein the synthetic resin foam containing the Freon or Freon-like substance is a heat insulating material for building materials. A method for treating a synthetic resin foam.
[6] The method for treating a synthetic resin foam containing chlorofluorocarbons or chlorofluorocarbon-like substances according to any one of the above [1] to [5], wherein the liquid fuel has a viscosity of 200 cP or less.

  According to the above-described present invention, the synthetic resin foam containing chlorofluorocarbon or chlorofluorocarbon-like substance is suspended in a liquid fuel to form a slurry fuel, and the slurry fuel is supplied to a firing furnace as an auxiliary fuel for cement firing. Therefore, compared with pneumatic feeding as a solid fuel, the synthetic resin foam can be introduced into a firing furnace while minimizing the introduction of cold air. Similar substances are surely rendered harmless by being exposed to a high temperature of 1500 ° C. or higher, and the synthetic resin foam is burned, and its thermal energy is used for cement firing. Therefore, according to the present invention, a synthetic resin foam containing chlorofluorocarbon or chlorofluorocarbon-like material, which has been disposed of in landfill as it is or reduced in volume in the past, can be used as a resource using existing equipment. It can be used effectively, and it can effectively prevent the destruction of the ozone layer and global warming due to the release of chlorofluorocarbons and chlorofluorocarbon-like substances into the atmosphere, and the use of fossil fuels can be reduced. effective.

  Further, according to the present invention, at the time of production of the slurry fuel, that is, at the time of crushing the synthetic resin foam containing chlorofluorocarbon or chlorofluorocarbon-like substance, at the time of mixing and pulverizing the synthetic resin foam and the liquid fuel, at the time of mixing, etc. The chlorofluorocarbon or chlorofluorocarbon-like substance generated in the process is sucked and introduced into the calcination furnace as combustion air for cement calcination. It is exposed to a high temperature of 1500 ° C. or higher, and is reliably decomposed. Therefore, it is possible to prevent the release of CFCs or CFC-like substances into the atmosphere even during the production of this slurry fuel.

Hereinafter, a method for treating a synthetic resin foam containing a fluorocarbon or a fluorocarbon-like substance according to the present invention will be described in detail with reference to the drawings.
First, FIG. 1 is a diagram conceptually showing an embodiment of a cement firing facility for carrying out a method for treating a synthetic resin foam containing a fluorocarbon or fluorocarbon-like substance according to the present invention. 1 is a rotary kiln for firing cement raw material, 2 is a burner provided in front of the kiln of the rotary kiln 1, 3 is a hood provided in front of the kiln of the rotary kiln 1, 4 is provided below the hood 3 and is attached to the rotary kiln 1 Clinker coolers 5a, 5b, 5c,... For cooling air while transporting the cement clinker produced in this way, intake air blowers for introducing cooling air into the clinker cooler 4, and 6 for synthetic resin foam containing CFCs or CFC-like substances A crusher for crushing the body W, 7 is a supply facility comprising a series of devices for transferring the crushed material Wc, storing it, and supplying it to the metering feeder, 8 A tank for storing the liquid fuel O, a metering feeder 9 for metering and feeding the crushed material Wc supplied from the supply equipment 7 to a mixing and grinding machine to be described later, and 10 a crushed material Wc from the metering feeder 9 A mixing pulverizer 11 having a pump function for mixing and pulverizing the liquid fuel O from the tank 8 is a dust collector for removing dust sucked from the crusher 6, the supply equipment 7, and the quantitative supply device 9.

  The synthetic resin foam containing fluorocarbon or fluorocarbon-like material according to the present invention using the equipment shown in FIG. 1 is a method of crushing a synthetic resin foam W containing fluorocarbon or fluorocarbon-like material with a crusher 6. Then, the crushed synthetic resin foam Wc and the liquid fuel O are mixed and pulverized by the mixing and pulverizing machine 10 to produce a slurry fuel WO in which the synthetic resin foam W is suspended. CFC or CFC-like substances generated from the synthetic resin foam W are sucked during production, and the suction gas is introduced into the rotary kiln 1 as combustion air for cement firing, and the produced slurry fuel WO is used as auxiliary fuel for cement firing. To the rotary kiln 1.

Here, to illustrate the chlorofluorocarbon referred in the present _{invention, CFC11 (CCl 3 F),} CFC12 (CCl 2 F 2), CFC113 (CCl 2 F-CClF 2), CFC114 (CClF 2 -CClF 2), CFC115 (CClF 2 -CF ₃₎ there is. In addition, chlorofluorocarbon-like substances referred to in the present invention include halon (1211: CF ₂ ClBr, 1301: CF ₃ Br, 2402: CF ₂ BrCF ₂ Br), alternative chlorofluorocarbon HCFC (22: CHF ₂ Cl, 123: CHCl ₂ CF ₃ , 141b: CH ₃ CCl ₂ F), alternative CFC HFC (134a: CH ₂ FCF ₃ ), halogen-containing organic solvents (carbon tetrachloride, 1,1,1-trichloroethane, trichlorethylene, etc.), etc. A substance used as a foaming agent that is concerned about the impact on the global environment.

  In the present invention, wastes such as synthetic resin foam W using the above-mentioned Freon or Freon-like substance as a foaming agent, for example, urethane foam, styrene foam, and the like are targeted. In particular, in the future, synthetic resin foams containing fluorocarbons or fluorocarbon-like substances used as heat insulating materials for building materials are expected to be produced in large quantities when building is demolished. Unlike the household electrical appliances included in the members, such as synthetic resin foam, or because it is discharged as a member of the tatami, it is easy to crush, and all the crushed materials can be used as auxiliary fuel for cement firing. Is preferably used.

  As the crusher 6 for crushing the synthetic resin foam W containing the above chlorofluorocarbon or chlorofluorocarbon-like substance, for example, a cutter mill, a Schrader, a disintegrator, an edge liner, a pin mill, a screen mill, etc. can be used. The crushed particle size of the synthetic resin foam W using the crusher 6 may be such that the crushed material Wc is crushed to a particle size that can be charged into the mixing pulverizer 10 described later.

  The liquid fuel O to be mixed and pulverized with the crushed synthetic resin foam Wc is preferably a flammable liquid waste or an inexpensive recycled fuel, and in particular, a viscous flammable liquid waste that can be easily transported using a spiral pump. A flammable liquid waste having a viscosity of less than 200 cp measured at 20 ° C. with a B-type viscometer is preferred. Examples of such combustible liquid waste include machine oil, animal and vegetable oils, waste alcohols, aqueous or oily waste paints, reclaimed oil, and emulsion fuel.

  The mixing ratio of the synthetic resin foam crushed material Wc and the liquid fuel O is preferably 1 to 20 parts by weight of the synthetic resin foam crushed material with respect to 100 parts by weight of the liquid fuel. This is not preferable if the blending amount of the synthetic resin foam exceeds 20 parts by weight because the ratio of the liquid fuel is too small, and the fluidity of the resulting slurry fuel WO is lost and blowing from the burner 2 becomes difficult. . Moreover, it is preferable that the minimum of the compounding quantity of a synthetic resin foam shall be 1 weight part or more from a viewpoint of the efficient detoxification process of the synthetic resin foam containing a fluorocarbon or a fluorocarbon similar substance. From this viewpoint, the blending ratio of the synthetic resin foam is more preferably 3 to 15 parts by weight of the crushed synthetic resin foam with respect to 100 parts by weight of the liquid fuel.

  Examples of the mixing and pulverizing machine 10 for mixing and pulverizing the synthetic resin foam crushed material Wc and the liquid fuel O include a homomixer, an in-line mixer, a colloid mill, a ball mill, and the like. In addition, a pump having a capability as a pump, for example, an in-line mixer, a pipeline homomixer, or the like can be preferably used.

  The target crushing particle size of the synthetic resin foam W by the mixing and pulverizing machine 10 is preferably performed so that the average particle size is 0.1 mm or more and 3 mm or less. Specifically, if the particle size is too large, the crushed material Wc contains a large amount of gas, so that it may be separated from the liquid fuel O in the pipe and blocked. As a result of investigating the influence of the particle size, the inventor has confirmed that the problem of blockage is greatly improved by setting the average particle size to 3 mm or less. On the other hand, even when the average particle size was less than 0.1 mm, it was found that there was no change in handling properties, and further reduction of the average particle size would reduce the crushing efficiency. It turned out to be desirable. That is, it should just be crushed to an average particle size of 0.1 mm or more and 3 mm or less.

  In the present invention, when the slurry fuel WO is manufactured, that is, when the synthetic resin foam W containing the chlorofluorocarbon or chlorofluorocarbon-like substance is crushed, when the crushed synthetic resin foam Wc is stored, and further if necessary. The chlorofluorocarbon or chlorofluorocarbon-like substance generated during mixing and pulverization of the crushed synthetic resin foam Wc and the liquid fuel O, etc. In this embodiment, since an in-line mixer with no risk of gas release is used as the mixing and grinding machine 10, the suction gas is sucked from the crushing machine 6, the supply equipment 7, and the metering supply machine 9), and the suction gas is passed through the dust collector 11. It is introduced into the rotary kiln 1 as combustion air for cement firing. Therefore, the crusher 6, the supply equipment 7, etc. which are the manufacturing equipment of slurry-like fuel need to be installed in the vicinity of the cement firing equipment. Moreover, the introduction position of the suction gas to the rotary kiln 1 is specifically introduced from the first chamber 4a or the second chamber 4b of the clinker cooler 4 installed in front of the kiln of the rotary kiln 1.

  The air chambers of the clinker cooler 4 are sequentially referred to as a first chamber 4a, a second chamber 4b, a third chamber 4c,... From the air chamber closer to the rotary kiln 1, and the first chamber 4a, second chamber The air introduced into the air chamber of the chamber 4b is supplied to the rotary kiln 1 as combustion air, and the air introduced into the air chamber after the third chamber 4c can be supplied to a calcining furnace, a coal mill, etc. (not shown). It is because there is sex. Therefore, the intake blower 5a or 5b for introducing the cooling air into the first chamber 4a or the second chamber 4b of the clinker cooler 4 (in the illustrated embodiment, to the intake blower 5a), the crusher 6, the supply equipment 7, etc. A pipe that communicates with is connected via a dust collector 11. Further, the solid content in the gas collected by the dust collector 11 is returned to the supply facility 7. The exhaust air from the dust collector 11 may be directly introduced into the first chamber 4a or the second chamber 4b of the clinker cooler 4 by the pressure of a fan attached to the dust collector 11.

  The chlorofluorocarbon or chlorofluorocarbon-like substance introduced into the rotary kiln 1 as combustion air for cement firing is exposed to a high temperature of 1500 ° C. or higher, and is reliably decomposed. In addition, harmful hydrogen chloride (HCl), hydrogen fluoride (HF), etc. generated at that time react with the cement raw material and are taken into the cement raw material, and are detoxified without any other special treatment. The

  In the present invention, the slurry fuel WO, which is a mixed and pulverized product of the crushed synthetic resin foam Wc and the liquid fuel O, is fed to the rotary kiln 1 as an auxiliary fuel for cement firing. At this time, the slurry-like fuel WO composed of the mixed pulverized product of the crushed synthetic resin foam Wc and the liquid fuel O is a liquid material having fluidity in which the synthetic resin foam W is suspended. As in the embodiment, when an in-line mixer having a pump function is used as the mixing and grinding machine 10, it can be directly supplied to the burner 2 as auxiliary fuel by the conveying force of the in-line mixer.

  Fluorocarbon or chlorofluorocarbon-like substances contained in the synthetic resin foam W present in a suspended state in the slurry-like fuel WO introduced into the rotary kiln 1 as auxiliary fuel are exposed to a high temperature of 1500 ° C. or higher and instantly decomposed. As a result, the liquid fuel O and the synthetic resin foam W are combusted, and the thermal energy is used for cement firing, which is effectively used as a heat resource.

Next, another embodiment of the method for treating a synthetic resin foam containing a fluorocarbon or fluorocarbon-like substance according to the present invention will be described with reference to FIG.
In FIG. 2, reference numerals 1 to 9 and 11 denote the same devices as in FIG. That is, 1 is a rotary kiln, 2 is a burner, 3 is a hood, 4 is a clinker cooler, 5a, 5b, 5c... Is an intake blower, 6 is a crusher, 7 is a supply facility, 8 is a tank, 9 is a metering feeder, 11 is a dust collector.
On the other hand, 20 is a mixer for mixing the crushed synthetic resin foam Wc supplied from the above-mentioned quantitative supply device 9 and the liquid fuel O supplied from the tank 8, and 21 is a mixture of the slurry-like fuel WO mixed with the burner 2. It is a pump that pumps to

  The synthetic resin foam containing a fluorocarbon or fluorocarbon-like substance according to the present invention using the equipment shown in FIG. 2 is a method of crushing a synthetic resin foam W containing fluorocarbon or a fluorocarbon-like substance with a crusher 6. Then, the crushed synthetic resin foam Wc and the liquid fuel O are mixed by the mixer 20 to produce the slurry fuel WO in which the synthetic resin foam W is suspended. During the production of the slurry fuel WO Fluorocarbon or chlorofluorocarbon-like substance generated from the synthetic resin foam W is sucked, and the suction gas is introduced into the rotary kiln 1 as combustion air for cement firing, and the produced slurry fuel WO is used as auxiliary fuel for cement firing as a rotary kiln. 1 is input.

That is, according to the present invention using the equipment of FIG. 1 and the present invention using the equipment of FIG. 2, the mixing of the synthetic resin foam W and the liquid fuel Oo is performed by the mixing pulverizer 10 or the mixer 20. There is a difference in whether or not to use.
Therefore, when the equipment of FIG. 1 is used, the crushed particle size of the synthetic resin foam W by the crusher 6 is charged into the mixing and crushing machine 10 because there is a mixing and crushing step by the mixing and crushing machine 10 later. Although it was sufficient that the particles were crushed to a particle size to be obtained, the target crushed particle size of the synthetic resin foam W by the crusher 6 is the miscibility with the liquid fuel O when the equipment of FIG. The average particle size of the synthetic resin foam in the slurry fuel obtained by the mixer 20 is from the viewpoints of stability and pumpability of the slurry fuel WO obtained by mixing, and economics of the crushing process. It is preferable to carry out so that it may be 0.1 mm or more and 3 mm or less.

  Moreover, as the crusher 6 which crushes the said synthetic resin foam W, a cutter mill, a Schrader, a disintegrator, an edge liner, a pin mill, a screen mill etc. can be used, for example, These apparatuses are used independently. Alternatively, it may be configured in multiple stages. For example, the synthetic resin foam W may first be roughly crushed with a cutter mill and then crushed to the target particle size with a screen mill.

  As the mixer 20 that mixes the crushed synthetic resin foam crushed material Wc and the liquid fuel O, for example, an omni mixer, a Nauta mixer, a V-type mixer, a biaxial mixer, or the like may be used. As in the case of the above-described embodiment, 1 to 20 parts by weight of the crushed synthetic resin foam is preferable with respect to 100 parts by weight of the liquid fuel, and further, the synthetic resin foam is crushed with respect to 100 parts by weight of the liquid fuel. 3 to 15 parts by weight of the product is preferred. The mixing step of the synthetic resin foam crushed material Wc and the liquid fuel O may be configured such that a plurality of mixers 20 are installed in parallel and continuously used while switching batches.

  Also in the present invention, when the slurry fuel WO is manufactured, that is, when the synthetic resin foam W containing the chlorofluorocarbon or chlorofluorocarbon-like substance is crushed, when the crushed synthetic resin foam Wc is stored, and further, the crushed The chlorofluorocarbon or chlorofluorocarbon-like substance generated at the time of mixing the synthetic resin foam Wc and the liquid fuel O is sucked from the crusher 6, the supply equipment 7 and the mixer 20, and the suction gas is passed through the dust collector 11. It is introduced into the rotary kiln 1 as combustion air for cement firing.

  The chlorofluorocarbon or chlorofluorocarbon-like substance introduced into the rotary kiln 1 as combustion air for cement firing is exposed to a high temperature of 1500 ° C. or higher, and is reliably decomposed. In addition, harmful hydrogen chloride (HCl), hydrogen fluoride (HF), etc. generated at that time react with the cement raw material and are taken into the cement raw material, and are detoxified without any other special treatment. The

  Also in the present invention, the slurry fuel WO, which is a mixture of the crushed synthetic resin foam Wc and the liquid fuel O, is supplied to the rotary kiln 1 as an auxiliary fuel for cement firing by the pump 21.

  Fluorocarbon or chlorofluorocarbon-like substances contained in the synthetic resin foam W present in a suspended state in the slurry-like fuel WO introduced into the rotary kiln 1 as auxiliary fuel are exposed to a high temperature of 1500 ° C. or higher and instantly decomposed. As a result, the liquid fuel O and the synthetic resin foam W are combusted, and the thermal energy is used for cement firing, which is effectively used as a heat resource.

  As mentioned above, although the preferred embodiment of the processing method of the synthetic resin foam containing a fluorocarbon or a fluorocarbon similar substance concerning the present invention was described, the present invention is not limited to the above-mentioned embodiment at all, Naturally, various modifications and changes are possible within the scope of the technical idea of the present invention described in the claims.

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which showed notionally one Embodiment of the cement baking equipment which implements the processing method of the synthetic resin foam containing the fluorocarbon or fluorocarbon similar substance which concerns on this invention. It is the figure which showed notionally other embodiment of the cement baking equipment which implements the processing method of the synthetic resin foam containing the Freon or Freon-like substance which concerns on this invention.

Explanation of symbols

1 Rotary kiln 2 Burner 3 Hood 4 Clinker cooler 4a, 4b, 4c ··· First, second and third chambers of clinker cooler
5a, 5b, 5c Intake blower 6 Crusher 7 Supply equipment 8 Tank 9 Fixed supply machine 10 Mixing and grinding machine 11 Dust collector 20 Mixer 21 Pump W Synthetic resin foam containing Freon or Freon-like substance Wc Synthetic resin foam Crushed material O Liquid fuel WO Slurry fuel

Claims (6)

  The synthetic resin foam containing chlorofluorocarbon or chlorofluorocarbon-like substance is crushed, and the crushed synthetic resin foam and liquid fuel are mixed and pulverized to obtain a slurry fuel in which the synthetic resin foam is suspended. Fluorocarbons or chlorofluorocarbon-like substances generated during production are sucked and the sucked gas is introduced into the firing furnace as combustion air for cement firing, and the produced slurry fuel is introduced into the firing furnace as auxiliary fuel for cement firing. A method for treating a synthetic resin foam containing chlorofluorocarbon or a chlorofluorocarbon-like substance.   The synthetic resin foam containing chlorofluorocarbon or chlorofluorocarbon-like substance is crushed, and the crushed synthetic resin foam and liquid fuel are mixed to form a slurry fuel in which the synthetic resin foam is suspended, and the production of the slurry fuel Fluorocarbons or chlorofluorocarbon-like substances that are sometimes generated are sucked and the suction gas is introduced into the firing furnace as combustion air for cement firing, and the produced slurry fuel is introduced into the firing furnace as auxiliary fuel for cement firing. A method for treating a synthetic resin foam containing chlorofluorocarbon or a chlorofluorocarbon-like substance.   Contains mixed pulverization of the crushed synthetic resin foam and liquid fuel so that the average particle size of the synthetic resin foam in the slurry fuel is 0.1 mm or more and 3 mm or less, or contains chlorofluorocarbon or chlorofluorocarbon-like substances. The method for treating a synthetic resin foam containing chlorofluorocarbon or chlorofluorocarbon-like substances according to claim 1 or 2, wherein the synthetic resin foam is crushed.   The mixed pulverization of the crushed synthetic resin foam and the liquid fuel, or the mixing of the crushed synthetic resin foam and the liquid fuel is performed at 1 to 20 parts by weight of the synthetic resin foam with respect to 100 parts by weight of the liquid fuel. The processing method of the synthetic resin foam containing the freon or flon-like substance in any one of Claims 1-3 characterized by the above-mentioned.   The synthetic resin foam containing a fluorocarbon or a fluorocarbon-like substance according to any one of claims 1 to 4, wherein the synthetic resin foam containing the fluorocarbon or a fluorocarbon-like substance is a heat insulating material for building materials. Processing method.   6. The method for treating a synthetic resin foam containing chlorofluorocarbon or chlorofluorocarbon-like substances according to claim 1, wherein the liquid fuel has a viscosity of 200 cP or less.

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