JP2006118301A - Asphalt dissolution plant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an asphalt dissolution plant with high safety capable of eliminating the bad smell of a melting gas. <P>SOLUTION: The asphalt dissolution plant is equipped with an asphalt dissolution device 10, a flash-back prevention device 30 and a gas passage 50 connecting both devices, and since the flash-back prevention device is equipped with a water fog tank 31 consisting of a water storage section 32 having a water gauge 34 and a mist filling section 33, a fog supply means 36 supplying fog to the fog filling section by absorbing water from the water storage section of the mist tank, a melting gas receiving inlet 42 flowing into the fog filling section of the water fog tank by receiving the melting gas exhausted from the asphalt dissolution device, a ventilation means 41 sending the melting gas flowing from the melting gas receiving inlet into the fog filling section of the water fog tank and a return gas exhaust port 43 exhausting the melting gas returned to the asphalt dissolution device by passing through the fog filling section, the melting gas lowers a temperature in the fog filling section to have difficulty in making ignition so as to make it safe. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an asphalt melting plant having a function of removing malodor of molten gas (blue smoke) generated from an asphalt melting pot used for asphalt waterproofing construction in construction and civil engineering.

  As countermeasures against bad odor in conventionally used asphalt melting plants, combustion methods, catalytic oxidation methods, adsorption methods, chemical solution absorption methods, ozone oxidation methods, water washing methods and the like are generally known. However, each of these conventional methods is provided with a separate facility and uses various materials, which increases costs and is impractical.

Therefore, since the molten gas is flammable, for example, as shown in JP-A-6-207403 (Patent Document 1) and JP-A-2001-271308 (Patent Document 2), asphalt is heated in an asphalt melting plant. A method of removing malodors from the molten gas while obtaining the economic effect of discharging the molten gas to the combustion chamber installed for melting and burning it to add fuel to the combustion chamber. Has been developed.
JP-A-6-207403 JP 2001-271308 A

  However, as in the conventional method described above, in the method of removing malodor by discharging the molten gas to the combustion chamber for heating and melting the asphalt and burning it, the fire in the combustion chamber ignites the molten gas and flows backward to dissolve. There was a possibility that the flashback phenomenon of burning into the molten asphalt of the kettle would not occur, and there was a drawback of lack of safety.

  Therefore, as a result of extensive research, the present inventor has prevented the flashback phenomenon that may occur when the molten gas is discharged into the combustion chamber for heating and melting the asphalt and burned. A high asphalt melting plant was developed.

  An asphalt melting plant according to the present invention includes an asphalt melting device, a backfire prevention device, and a gas flow path connecting both devices. The asphalt melting device heats and melts the asphalt, and heats the melting kettle. A combustion gas chamber, a melt gas discharge port for discharging a melt gas generated when the asphalt is heated and melted in the melting pot, a combustion gas discharge port for discharging a combustion gas generated in the combustion chamber, and a backfire prevention device to the combustion chamber. The backfire prevention device is equipped with a return gas inlet for receiving the returning molten gas, and the backfire prevention device absorbs water from the water mist tank consisting of a water storage unit equipped with a water amount gauge and a mist filling part, and from the water mist storage part to the mist filling part. Fog supply means for supplying mist, molten gas inlet that receives the molten gas discharged from the asphalt melting device and flows to the mist filling part of the water mist tank, molten gas that has flowed in from the molten gas inlet A blowing means for sending gas to the mist filling part of the water mist tank, and a return gas discharge port for discharging the molten gas passing through the mist filling part and returning to the asphalt melting apparatus, the gas flow path of the asphalt melting apparatus A molten gas passage for flowing molten gas from the molten gas outlet to the molten gas inlet of the backfire prevention device, and a molten gas to flow from the return gas outlet of the backfire prevention device to the return gas inlet of the asphalt melting device It consists of a return gas passage.

  By comprising as mentioned above, since molten gas does not ignite because temperature falls in the mist filling part of a water mist tank. Therefore, even if the fire in the combustion chamber flows back to the mist-filled portion, the molten gas in the mist-filled portion does not ignite, and the fire in the combustion chamber disappears in the mist-filled portion. In addition, since the molten gas generated in the melting pot is pressurized so as to always return to the combustion chamber by the blowing means, there is no possibility that the molten gas flows backward from the combustion chamber. Therefore, the fire of the combustion gas does not flow backward and burn into the melting pot.

  Further, even when no air blowing means is provided from the flashback prevention device in the asphalt melting plant, the molten gas does not ignite because the temperature is lowered in the mist-filled portion of the water mist tank. Therefore, even if the fire in the combustion chamber reaches the mist-filled portion, the molten gas in the mist-filled portion will not ignite, the fire in the combustion chamber will disappear in the mist-filled portion, and the fire of the combustion gas will flash back and dissolve. It will not burn into the kettle.

  Further, the above-mentioned asphalt melting plant does not include a water mist tank and its auxiliary device from the flashback prevention device, and a molten gas receiving port for receiving the molten gas discharged from the asphalt melting device and a molten gas returning to the combustion chamber of the asphalt melting device. The return gas discharge port for discharging the gas is directly connected, and a blowing means is arranged between them, so that the molten gas flowing from the molten gas receiving port together with the air sent from the blowing means is sent to the combustion chamber of the asphalt melting device. In this case, since the molten gas generated in the melting pot is pressurized so as to always return to the combustion chamber by the blowing means, there is no possibility that the molten gas flows backward from the combustion chamber. Therefore, the fire of the combustion gas does not flow backward and burn into the melting pot.

  The asphalt melting plant according to the present invention having the above-described configuration is excellent in economic efficiency, and the molten gas has an excellent effect that the bad odor is removed by combustion and the safety is high. Moreover, since the harmful gas contained in the molten gas is almost removed by reburning the molten gas, the emission of the harmful gas can be reduced as much as possible, which can play a role in solving environmental problems. Excellent effect can be expected. Furthermore, since resources can be reused by reburning the molten gas, the effect of energy saving measures is also exhibited.

  In the following, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a flowchart showing the configuration of the asphalt melting plant according to the first embodiment of the present invention, and FIG. 2 is a schematic diagram showing the configuration of the asphalt melting plant according to the first embodiment.

  In the figure, A shows an asphalt melting plant according to the present embodiment, and this asphalt melting plant A is composed of an asphalt melting device 10, a backfire prevention device 30, and a gas flow path 50 connecting both devices 10, 30. ing.

  The asphalt melting apparatus 10 is mainly intended to heat and melt asphalt, and includes a melting pot 11 that forms a container for heating and melting the asphalt, and a heat exchange boiler for heating the melting pot 11, for example. And a heat source 13 such as a burner for supplying thermal energy to the combustion chamber 12 as main elements. Further, as accessory elements, a combustion gas comprising a melt gas discharge port 14 for discharging a melt gas generated when the asphalt is heated and melted in the melting pot 11, and a chimney for discharging the combustion gas generated in the combustion chamber 12, for example. A discharge port 15 and a return gas receiving port 16 for receiving the molten gas returning from the backfire prevention device 30 to the combustion chamber 12 are provided. In FIG. 2, 17 is an asphalt inlet for charging asphalt into the melting pot 11, 18 is a take-out cock for taking out molten asphalt, and 19 is a fuel tank for storing fuel supplied to the heat source 13. Further, the asphalt melting plant A according to the present embodiment is a movable type, and a rear wheel 20 made of a pneumatic tire and a front wheel 21 driven in the traveling direction are arranged at the bottom of the asphalt melting apparatus 10 and fixed. A fixed jack 22 is sometimes provided for levitating the front wheel 21.

  The backfire prevention device 30 mainly includes a water mist tank 31, a mist supply means 36, and a blower means 41. The water mist tank 31 is a closed container composed of a water storage part 32 for storing water and a mist filling part 33 which is a space for filling the mist above the water storage tank 31, and is provided with a water amount gauge 34 for confirming the water storage amount. It has been. The mist supply means 36 includes a pump 37, a suction pipe 38 connected to the water storage part 32 of the water mist tank 31, and a water discharge pipe 39 connected to the mist filling part 32 of the water mist tank 31. The water in the water storage section 32 of the 31 is sucked up by the pump 37 through the suction pipe 38, and the sucked up water is sprayed in a mist form from the spray nozzle 40 at the tip of the water discharge pipe 39 to the mist filling section 33 through the water discharge pipe 39. It has become so.

  Further, the flashback prevention device 30 is provided with a molten gas receiving port 42 that receives the molten gas discharged from the asphalt melting device 10 and flows it to the mist filling portion 33 of the water mist tank 31. A return gas discharge port 43 that discharges the molten gas that passes through and returns to the asphalt melting apparatus 10 is provided. The air blowing means 41 is constituted by, for example, a fan-type air blower, and the air blown out from the air blowing means 41 merges with the molten gas flowing in from the molten gas receiving port 42 to the direction of the mist filling portion 33 of the water mist portion 31. The pipe is connected so as to flow.

  The backfire prevention device 30 is provided with a front wheel 44 and a rear wheel 45 in order to make the backfire prevention device 30 movable because the asphalt melting device 10 is movable.

  The asphalt melting device 10 and the backfire prevention device 30 are connected as a gas channel 50 by a molten gas passage channel 51 and a return gas passage channel 52. The molten gas passage 51 is connected from the molten gas discharge port 14 of the asphalt melting device 10 to the backfire prevention device 30 and the molten gas receiving port 42, and is generated in the melting pot 11 of the asphalt melting device 10. In this case, the molten gas is forced to flow only in the direction of the mist filling portion 33 by the blowing means 41, It does not flow backward. The return gas passage 52 is connected to the return gas inlet 16 of the asphalt melting device 10 from the mist filling portion 33 of the backfire prevention device 30, and the molten gas sent to the mist filling portion 33 is asphalted. The molten gas flowing into the combustion chamber 12 serves as a fuel for heating the melting vessel 11 by reburning, and removes bad odor and burns. It is discharged from the gas discharge port 15 to the outside as combustion gas.

  By comprising as mentioned above, since the temperature falls in the mist filling part 33 of the water mist tank 31, the high temperature combustible molten gas generated in the melting pot 11 does not ignite. Therefore, even if the fire in the combustion chamber 12 flows backward and reaches the mist filling portion 33, the molten gas in the mist filling portion 33 does not ignite, and the fire in the combustion chamber 12 disappears in the mist filling portion 33. In addition, since the molten gas generated in the melting pot 11 is pressurized so as to always return to the combustion chamber 12 by the blower means 41, there is no possibility that the molten gas flows backward from the combustion chamber 12. Therefore, the fire of the combustion gas does not flow backward and burn into the melting pot 11.

  As described above, the asphalt melting plant A according to the first embodiment does not require complicated equipment and chemicals with high costs, and the molten gas can be reused as fuel when removing the malodor. It is economical and has an excellent effect that the molten gas removes offensive odors by combustion and can achieve its original purpose, and there is no risk of fire or explosion, and it is highly safe. Is.

  In addition, although the present Example 1 is comprised as a movable thing so that asphalt melting plant A can be used on a road etc., it is not equipped with a wheel etc., but is a stationary type used at a factory etc. It may be configured.

  FIG. 3 is a flowchart showing the configuration of the asphalt melting plant according to the second embodiment of the present invention.

  In the figure, B shows an asphalt melting plant according to the present embodiment, and this asphalt melting plant B is unique to the asphalt melting apparatus 10 having the same configuration as that described in detail in the first embodiment. The backfire prevention device 130 excluding the air blowing means 41 in the first embodiment and the gas flow path 50 having the same configuration as that described in detail in the first embodiment connecting both the devices 10 and 130 are configured. Therefore, regarding the asphalt melting apparatus 10 and the gas flow path 50, the description of the first embodiment will be used, and only the description of the backfire prevention apparatus 130 and the contents different from the first embodiment will be described in detail below.

  The backfire prevention device 130 mainly includes a water mist tank 131 and a mist supply means 136. The water mist tank 131 is a closed container composed of a water storage part 132 for storing water and a mist filling part 133 that is a space for filling the mist above it, and a water gauge 134 for confirming the water storage amount is provided. It has been. The mist supply means 136 includes a pump 137, a suction pipe 138 connected to the water storage part 132 of the water mist tank 131, and a water discharge pipe 139 connected to the mist filling part 132 of the water mist tank 131. The water in the water storage unit 132 131 is sucked up by the pump 137 through the suction pipe 138, and the sucked-up water is sprayed to the mist filling part 133 from the spray nozzle at the tip of the water discharge pipe 139 through the water discharge pipe 139. It is like that.

  Further, the backfire prevention device 130 is provided with a molten gas receiving port 142 that receives the molten gas discharged from the asphalt melting device 10 and flows it to the mist filling portion 133 of the water mist tank 131. A return gas discharge port 143 that discharges the molten gas that passes through and returns to the asphalt melting apparatus 10 is provided.

  The asphalt melting device 10 and the backfire prevention device 130 are connected as a gas channel 50 by a molten gas passage channel 51 and a return gas passage channel 52. The molten gas passage 51 is connected from the molten gas discharge port 14 of the asphalt melting device 10 to the backfire prevention device 130 and the molten gas receiving port 142, and is generated in the melting pot 11 of the asphalt melting device 10. The molten gas to be supplied is caused to flow to the fog filling portion 133 of the backfire prevention device 130. The return gas passage 52 is connected to the return gas receiving port 16 of the asphalt melting device 10 from the fog filling portion 133 of the backfire prevention device 130, and the molten gas sent to the fog filling portion 133 is asphalted. The molten gas flowing into the combustion chamber 12 serves as a fuel for heating the melting vessel 11 by reburning, and removes bad odor and burns. It is discharged from the gas discharge port 15 to the outside as combustion gas.

  By comprising as mentioned above, since the temperature falls in the mist filling part 133 of the water mist tank 131, the high temperature combustible molten gas generated in the melting pot 11 does not ignite. Therefore, even if the fire in the combustion chamber 12 flows backward and reaches the mist filling portion 133, the molten gas in the mist filling portion 133 is not ignited, and the fire in the combustion chamber 12 is extinguished in the mist filling portion 133. Therefore, the fire of the combustion gas does not flow backward and burn into the melting pot 11.

  As described above, the asphalt melting plant B according to the second embodiment does not require complicated equipment and chemicals with high costs, and the advantage that the molten gas can be reused as fuel when removing the malodor. It is economical and has an excellent effect that the molten gas removes offensive odors by combustion and can achieve its original purpose, and there is no risk of fire or explosion, and it is highly safe. Is.

  In addition, the asphalt melting plant B according to the present embodiment is a movable type that can be used on the road or the like, and accordingly, the front and rear wheels are provided to make the backfire prevention device 130 movable. However, the present invention is not limited to this, and it may be configured as a stationary type used in a factory or the like without being equipped with wheels.

  FIG. 4 is a flowchart showing the configuration of the asphalt melting plant according to the third embodiment of the present invention.

  In the figure, C shows an asphalt melting plant according to the present embodiment, and this asphalt melting plant C is unique to the asphalt melting apparatus 10 having the same configuration as that described in detail in the first embodiment, namely, A gas having the same configuration as that described in detail in the first embodiment in which the device 10 and 230 are connected to the backfire prevention device 230 excluding the water mist tank 31 in the first embodiment and the mist supply means 36 that is an auxiliary device thereof. The flow path 50 is comprised. Therefore, regarding the asphalt melting apparatus 10 and the gas flow path 50, the description of the first embodiment will be used, and only the description of the backfire prevention apparatus 230 and the contents different from the first embodiment will be described in detail below.

  The backfire prevention device 230 is mainly composed of the air blowing means 241, and the backfire prevention device 230 is provided with a melt gas receiving port 242 that receives the melt gas discharged from the asphalt melting device 10. A return gas discharge port 243 is provided for discharging the molten gas returning to step (b). The air blowing means 241 is composed of, for example, a fan-type air blower, and the air blown out from the air blowing means 241 merges with the molten gas flowing in from the molten gas receiving port 242 and flows in the direction of the return gas discharge port 243. Pipe connected.

  The asphalt melting device 10 and the backfire prevention device 230 are connected as a gas channel 50 by a molten gas passage channel 51 and a return gas passage channel 52. The molten gas passage 51 is connected from the molten gas discharge port 14 of the asphalt melting device 10 to the backfire prevention device 30 and the molten gas receiving port 42, and is generated in the melting pot 11 of the asphalt melting device 10. In this case, the melted gas is forced to flow only in the direction of the return gas discharge port 243 by the blower 241 so as not to flow backward. It has become. The return gas passage 52 is connected from the backfire prevention device 230 to the return gas receiving port 16 of the asphalt melting device 10, and flows the molten gas into the combustion chamber 12 of the asphalt melting device 10. The molten gas that has flowed into the combustion chamber 12 plays a role of fuel for heating the melting pot 11 by being recombusted, and the malodor is removed and discharged from the combustion gas discharge port 15 as combustion gas. It is like that.

  With the configuration described above, the molten gas generated in the melting pot 11 is pressurized so that it is always returned to the combustion chamber 12 by the blower 241, so there is no possibility that the molten gas flows backward from the combustion chamber 12. . Therefore, the fire of the combustion gas does not flow backward and burn into the melting pot 11.

  As described above, the asphalt melting plant C according to the third embodiment does not require complicated equipment and chemicals with high costs, and the molten gas can be reused as fuel when removing the bad odor. It is economical and has an excellent effect that the molten gas removes offensive odors by combustion and can achieve its original purpose, and there is no risk of fire or explosion, and it is highly safe. Is.

  Note that the asphalt melting plant C according to the present embodiment is a movable type that can be used on the road and the like, and accordingly, the backfire prevention device 230 is also provided with a front wheel and a rear wheel. However, the present invention is not limited to this, and it may be configured as a stationary type used in a factory or the like without being equipped with wheels.

  Note that the above-described embodiments are not limited to this, but include a wide range of embodiments described in the claims.

  The asphalt melting plant in the present invention can also be used as an asphalt melting plant used when recycling asphalt waste.

It is a flowchart which shows the structure of the asphalt melting plant which concerns on Example 1 of this invention. It is the schematic which shows the structure of the asphalt melting plant which concerns on Example 1 of this invention. It is a flowchart which shows the structure of the asphalt melting plant which concerns on Example 2 of this invention. It is a flowchart which shows the structure of the asphalt melting plant which concerns on Example 3 of this invention.

Explanation of symbols

A ... Asphalt melting plant 10 ... Asphalt melting device 11 ... Melting pot 12 ... Combustion chamber 13 ... Heat source 14 ... Molten gas outlet 15 ... Combustion gas outlet 16 ... Return gas receiving port 17 ... Asphalt inlet 18 ... Taking cock 19 ... Fuel tank 20 ... Rear wheel 21 ... Front wheel 22 ... Fixed jack 30 ... Backfire prevention Apparatus 31 ... Water mist tank 32 ... Water storage part 33 ... Fog filling part 34 ... Water volume gauge 36 ... Fog supply means 37 ... Pump 38 ... Suction pipe 39 ... Release Water pipe 40 ... Spray nozzle 41 ... Blowing means 42 ... Molten gas inlet 43 ... Return gas outlet 44 ... Front wheel 45 ... Rear wheel 50 ... Gas flow path 51 ...・ Melting gas passage 52 ... Return Gas passage B B ... Asphalt melting plant 130 ... Backfire prevention device 131 ... Water mist tank 132 ... Water storage part 133 ... Fog filling part 134 ... Water quantity gauge 136 ... Fog supply means 137 ... Pump 138 ・ ・ Suction pipe 139 ・ ・ Drain pipe 142 ・ ・ Melting gas inlet 143 ・ ・ Return gas outlet C ・ ・ ・ ・ Asphalt melting plant 230 ・ ・ Backfire prevention device 241 ・ ・ Blowing means 242 ・ ・ Melting gas Receiving port 243 ... Return gas discharge port

Claims (3)

Asphalt melting device, backfire prevention device, and gas flow path connecting both devices,
The asphalt melting apparatus includes a melting pot for heating and melting the asphalt, a combustion chamber for heating the melting pot, a molten gas discharge port for discharging a molten gas generated when the asphalt is heated and melted in the melting pot, and a combustion generated in the combustion chamber. A combustion gas discharge port for discharging the gas, and a return gas receiving port for receiving the molten gas returning from the backfire prevention device to the combustion chamber,
The backfire prevention device consists of a water mist tank consisting of a water storage unit equipped with a water gauge and a mist filling part, a mist supply means that absorbs water from the water mist storage part and supplies mist to the mist filling part, and an asphalt melting device. A molten gas receiving port for receiving the discharged molten gas and flowing it to the mist filling portion of the water mist tank, a blowing means for sending the molten gas flowing in from the molten gas receiving port to the mist filling portion of the water mist tank, and a mist filling portion Provided with a return gas discharge port that discharges the molten gas that passes back to the asphalt melting device,
The gas flow path includes a molten gas passage for flowing a molten gas from a molten gas discharge port of the asphalt melting device to a molten gas receiving port of the flashback prevention device, and an asphalt melting device from the return gas discharge port of the flashback prevention device. Consisting of a return gas passage channel for flowing molten gas to the return gas inlet of
Asphalt melting plant characterized by that. Asphalt melting device, backfire prevention device, and gas flow path connecting both devices,
The asphalt melting apparatus includes a melting pot for heating and melting the asphalt, a combustion chamber for heating the melting pot, a molten gas discharge port for discharging a molten gas generated when the asphalt is heated and melted in the melting pot, and a combustion generated in the combustion chamber. A combustion gas discharge port for discharging the gas, and a return gas receiving port for receiving the molten gas returning from the backfire prevention device to the combustion chamber,
The backfire prevention device consists of a water mist tank consisting of a water storage unit equipped with a water gauge and a mist filling part, a mist supply means that absorbs water from the water mist storage part and supplies mist to the mist filling part, and an asphalt melting device. It has a molten gas receiving port for receiving the discharged molten gas and flowing it to the mist filling part of the water mist tank, and a return gas discharging port for discharging the molten gas passing through the mist filling part and returning to the asphalt melting device,
The gas flow path includes a molten gas passage for flowing a molten gas from a molten gas discharge port of the asphalt melting device to a molten gas receiving port of the flashback prevention device, and an asphalt melting device from a return gas discharge port of the flashback prevention device. Consisting of a return gas passage channel for flowing molten gas to the return gas inlet of
Asphalt melting plant characterized by that. Asphalt melting device, backfire prevention device, and gas flow path connecting both devices,
The asphalt melting apparatus includes a melting pot for heating and melting the asphalt, a combustion chamber for heating the melting pot, a molten gas discharge port for discharging a molten gas generated when the asphalt is heated and melted in the melting pot, and a combustion generated in the combustion chamber. A combustion gas discharge port for discharging the gas, and a return gas receiving port for receiving the molten gas returning from the backfire prevention device to the combustion chamber,
The backfire prevention device is a molten gas receiving port that receives the molten gas discharged from the asphalt melting device, a blowing means that sends the molten gas flowing in from the molten gas receiving port to the combustion chamber of the asphalt melting device, and a return to the asphalt melting device. Provided with a return gas discharge port for discharging the molten gas,
The gas flow path includes a molten gas passage for flowing a molten gas from a molten gas discharge port of the asphalt melting device to a molten gas receiving port of the flashback prevention device, and an asphalt melting device from a return gas discharge port of the flashback prevention device. Consisting of a return gas passage channel for flowing molten gas to the return gas inlet of
Asphalt melting plant characterized by that.

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