JP2007152989A - Vehicle for reformed sulfur material transportation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle for reformed sulfur material transportation suitable for transportation of a reformed sulfur material in a melted state. <P>SOLUTION: A cooker car 1 has a stirring tank 2 to store the reformed sulfur material and a heating device 7. The inside of the stirring tank 2 is divided into a material storage chamber to store the reformed sulfur material and a heating medium chamber positioned below it and to store heating medium fluid. The heating device 7 has a heater to heat the heating medium fluid stored in the heating medium chamber and heats the reformed sulfur material in the material storage chamber up to a temperature at which the reformed sulfur material is not solidified. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a modified sulfur material transport vehicle used for transporting a modified sulfur material obtained by mixing modified sulfur modified with a sulfur modifier and aggregate while stirring.

  As one of civil engineering and construction materials, concrete in which aggregates are bonded with cement is generally used. In recent years, attempts have been made to use sulfur as a material for civil engineering and construction, paying attention to the property of sulfur that is solid at room temperature and melts above about 119 ° C. A material using sulfur (sulfur material) is known as a material having high strength, excellent water resistance and strong acid resistance as compared with ordinary concrete. Further, since the finish and handling of the sulfur material is similar to that of concrete, the solidified material is also called sulfur concrete or sulfur solidified body (see Patent Document 1).

  Since sulfur has ignitability, it is difficult to melt and cast it on site. Therefore, in Patent Document 2, a modified sulfur in which sulfur is modified by adding a sulfur modifier as an additive to molten sulfur is produced, and the modified sulfur and fine aggregate are mixed to form a melt. Manufacturing the modified sulfur intermediate material, and mixing the modified sulfur intermediate material and the coarse aggregate and solidifying them to produce a modified sulfur solidified body.

Solid modified sulfur intermediate materials and modified sulfur solidified bodies obtained by solidifying modified sulfur materials are treated as non-hazardous materials. Therefore, if the modified sulfur intermediate material is manufactured in advance at the plant, transported to the site, and mixed with the coarse aggregate at the site, it can be safely placed on site. Alternatively, if the modified sulfur solidified body is manufactured in advance at the plant, transported to the site, and melted again at the site, it can be safely placed on site.
Japanese Patent Laid-Open No. 2004-160693 JP 2005-82475 A

  However, in the method in which the modified sulfur intermediate material and the modified sulfur solidified body are manufactured in advance at the plant and transported to the site, equipment for mixing the modified sulfur intermediate material and the coarse aggregate on site or a modification is required. It is necessary to install equipment for melting the solid sulfur solidified body on site. Installation of these facilities increases installation man-hours and installation costs.

  In order to eliminate the installation man-hours and installation costs of these facilities, a modified sulfur material, which is a kneaded mixture of modified sulfur intermediate material and coarse aggregate, is manufactured in advance in the plant, It only has to be transported to the site and placed at the site.

  Although transportation vehicles can be used for transportation of the modified sulfur material, it is necessary to heat the modified sulfur material during transportation so that the modified sulfur material does not solidify. As a vehicle for transportation provided with a heating device, there is a so-called cooker vehicle used for transporting goose asphalt mixture. The cooker wheel is equipped with a tank provided with a stirring blade inside and provided with a burner at the bottom. The goose asphalt mixture contained in the tank is transported to the construction site while being heated and stirred.

  However, since the conventional cooker vehicle simply heats the lower part of the tank with a burner, the temperature variation in the tank is large. Therefore, the conventional cooker car can sufficiently maintain the molten state when transporting asphalt having a softening point of 40 ° C. to 55 ° C. and relatively low, but when used for transporting the modified sulfur material, There was a possibility that the modified sulfur material partially solidified. Moreover, although hydrogen sulfide is generated from the modified sulfur material in the molten state, hydrogen sulfide has an odor and is highly corrosive, so it is necessary to deal with these.

  Therefore, an object of the present invention is to provide a vehicle for transporting modified sulfur material suitable for transporting the modified sulfur material in a molten state.

  In order to achieve the above object, a vehicle for transporting modified sulfur material according to the present invention is a vehicle for transporting modified sulfur material using sulfur as a raw material, and includes a tank containing the modified sulfur material, A heating device that heats the modified sulfur material to a temperature at which the modified sulfur material does not solidify. Furthermore, in the modified sulfur material transport vehicle of the present invention, the inside of the tank is divided into a material storage chamber that stores the modified sulfur material, and a heat medium chamber that is located under the material storage chamber and stores the heat transfer fluid. The partitioned heating device has a heater for heating the heat medium fluid accommodated in the heat medium chamber.

  Thus, by arranging the heat medium chamber below the material storage chamber and heating the heat medium fluid in the heat medium chamber with the heating device, the modified sulfur material in the material storage chamber is uniformly heated and applied from the plant. It is transported in the molten state to the site.

  The heating device may include the heater and a heat medium tank disposed above the heater and connected to the heat medium chamber. Thereby, since a heating apparatus can also be installed in the position away from the tank, the freedom degree in arrangement | positioning of a heating apparatus improves. In order to more uniformly heat the material storage chamber, it is preferable to provide a heat medium chamber and a lower heat medium flow path in communication with the side wall of the tank. Furthermore, if the inner surface of the tank is made of a material having corrosion resistance to sulfur, corrosion of the inner surface of the tank by the modified sulfur material can be prevented.

  The vehicle for transporting the modified sulfur material of the present invention may further include a deodorizing device that removes odor from the gas generated in the tank by the modified sulfur material and exhausts the odor out of the tank. Thereby, the odor generated from the modified sulfur material in the molten state in the tank does not leak to the surroundings.

  According to the present invention, the modified sulfur material can be transported from the plant to the construction site in a molten state. As a result, there is no need to perform additional processing to obtain the modified sulfur material melted at the construction site, and there is no need to install additional processing equipment at the construction site, reducing the installation man-hours and costs. can do. Furthermore, by providing a deodorizing device, odor can be prevented from leaking to the surroundings.

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

  FIG. 1 is a side view of a modified sulfur material transport vehicle according to an embodiment of the present invention. The modified sulfur material transport vehicle of the present embodiment is a cooker vehicle 1, a stirred tank 2 supported on the chassis, and a modified sulfur in a molten state in the stirred tank 2 disposed at the rear of the stirred tank 2. A hopper 4 for introducing the material and a chute 5 for discharging the modified sulfur material in the stirring tank 2 from the stirring tank 2 are provided.

  The agitation tank 2 accommodates the modified sulfur material inside. Below, the stirring tank 2 is demonstrated with reference to FIG. 2A is a plan view of the stirring tank shown in FIG. 1, and FIG. 2B is a longitudinal sectional view thereof.

  The inside of the stirring tank 2 is divided into two vertically by a partition wall 2a. The upper space is a material storage chamber 2b that stores the modified sulfur material, and the lower space is a heat medium chamber 2c that stores the heat medium.

  A stirring blade 3 is provided in the material storage chamber 2b so as to be rotatable with its rotation axis in the vertical direction. Therefore, the stirring blade 3 rotates in a horizontal plane. The rotating shaft of the stirring blade 3 extends through the upper wall of the stirring tank 2, and the portion of the rotating shaft protruding from the stirring tank 2 is connected to the stirring blade driving device 3 a for driving the stirring blade 3 to rotate. Has been. During the transportation of the modified sulfur material, the stirring blade 3 is driven by the stirring blade driving device 3a. Thereby, the modified sulfur material in the material storage chamber 2b is agitated. By the stirring of the modified sulfur material, separation between the modified sulfur intermediate material and the coarse aggregate constituting the modified sulfur material is prevented.

  The hopper 4 and the chute 5 are provided in communication with the stirring tank 2. A lid is provided on the upper surface of the hopper 4 so that it can be opened and closed. A shutter (not shown) is also provided on the chute 5 so that it can be opened and closed. By closing the lid of the hopper 4 and the shutter of the chute 5, the inside of the agitation tank 2 is sealed. During the transportation of the modified sulfur material, the inside of the agitation tank 2 is sealed. When the cooker vehicle 1 arrives at the construction site and places the modified sulfur material, the shutter of the chute 5 is opened. Thereby, the modified sulfur material in the stirring tank 2 is discharged to the outside of the stirring tank 2 through the chute 5.

  The heat medium chamber 2 c is connected to the heating device 7. The heating device 7 is mounted on the chassis of the cooker wheel 1 similarly to the stirring tank 2, and includes a heating medium tank 7a for storing the heating medium fluid, and a heater 7b for heating the heating medium fluid in the heating medium tank 7a. Have The heat medium tank 7a and the heat medium chamber 2c are connected by connecting pipes 7c and 7d so that the heat medium fluid can freely circulate between the two. The heat medium tank 7a, the heat medium chamber 2c, and the connection The tubes 7c and 7d are filled with a heat transfer fluid. Thereby, the heat medium fluid in the heat medium tank 7a heated by the heater 7b is supplied to the heat medium chamber 2c arranged in the lower part of the stirring tank 2 through the connection pipe 7c, and the heat medium chamber 2c. The internal heat medium fluid flows through the connecting pipe 7d into the heat medium tank 7a and is heated by the heater 7b. This flow of the heat transfer fluid may use natural convection of the heat transfer fluid itself due to heating of the heat transfer fluid, or may be forcibly generated by a pump (not shown). In the heat medium chamber 2c, the flow of the heat medium fluid is generated by the heating of the heat medium fluid, so that the heat medium chamber 2c is heated almost uniformly.

The heating device 7 is for maintaining the temperature of the modified sulfur material inside the stirring tank 2 at a predetermined temperature at which the modified sulfur material does not solidify, and indirectly in the material storage chamber 2b via the heat transfer fluid. Heat. The predetermined temperature at which the modified sulfur material does not solidify is a temperature of 119 ° C. or higher, which is the solidification point of the molten sulfur, and preferably the temperature of the modified sulfur material is in the range of 120 ° C. or higher and 150 ° C. or lower. The stirring tank 2 is heated.
When the temperature of the modified sulfur material is less than 120 ° C., the time until the modified sulfur material solidifies at the time of discharging the modified sulfur material is shortened, and workability is deteriorated. When the temperature exceeds 150 ° C., the temperature of the heat transfer fluid exceeds 160 ° C., and the contact portion with the partition wall 2a of the modified sulfur material to which heat is supplied via the partition wall 2a is overheated, and the modified sulfur. There is a risk that the material will become rubber.
The heating method of the heating device 7 may be a gas combustion type or an electric heater type. As the heat transfer fluid, for example, turbine oil can be used, but the temperature of the modified sulfur material only needs to be maintained in a range of 120 ° C. or higher and 150 ° C. or lower. Not limited.

  In this way, the modified sulfur material in the stirring tank 2 is not directly heated by the heater 7b but indirectly by the heat transfer fluid in the heat transfer chamber 2c, thereby lowering the lower wall of the material storage chamber 2b. The entire surface of the partition wall 2a to be configured can be heated uniformly. Thereby, since the modified sulfur material in the material storage chamber 2b is heated uniformly, the modified sulfur material can be transported while maintaining the molten state well. Further, the heating device 7 includes a heating medium tank 7b connected to the heating medium chamber 2b, and heats the heating medium fluid in the heating medium tank 7b, whereby the heating device 7 on the cooker vehicle 1 is heated. The position of can be set freely.

  Referring to FIG. 1 again, the cooker vehicle 1 of this embodiment further includes a deodorizing device 6.

  The deodorizing device 6 adsorbs and exhausts odors such as hydrogen sulfide and sulfur dioxide generated from the melted modified sulfur material. The deodorizing device main body 6a and the intake pipe connected to the deodorizing device main body 6a, respectively. 6b and an exhaust pipe 6c. The intake pipe 6b communicates with the inside of the agitation tank 2 in the upper part of the agitation tank 2, and guides the gas in the agitation tank 2 into the deodorizing apparatus main body 6a. The deodorizing apparatus main body 6a has an adsorbent such as activated carbon or chemicals that adsorbs odor. The exhaust pipe 6c exhausts the gas in which the odor is adsorbed by the deodorizing apparatus body 6a. This prevents odors from leaking around when the modified sulfur material is transported and discharged from the chute 5.

  As the deodorizing device 6, in addition to the above-described adsorption method, existing degassing and deodorizing techniques such as a dilution method and a combustion method may be used.

  Further, since hydrogen sulfide generated from the molten modified sulfur material is highly corrosive, the inner surface of the material storage chamber 2b may be corroded if the cooker vehicle 1 is used for a long period of time. Therefore, in order to prevent corrosion of the inner surface of the material storage chamber 2b, it is desirable to configure the inner surface of the material storage chamber 2b with a material having corrosion resistance against sulfur. Examples of the material having corrosion resistance against sulfur include stainless steel such as SUS310 and SUS316 and sulfuric acid dew point corrosion steel.

  Here, the modified sulfur material transported by the cooker vehicle 1 will be described.

  The modified sulfur material is made from sulfur, sulfur modifier, fine powder, and coarse aggregate as raw materials.

  First, molten sulfur and a sulfur modifier are mixed to produce modified sulfur. Sulfur may be natural sulfur or sulfur produced by desulfurization of oil or natural gas. Sulfur modifiers modify sulfur by modifying, for example, polymerizing sulfur. Examples of the sulfur modifier include one or a mixture of two or more of olefin compounds such as cyclopentadiene (DCPD), tetrahydroindene (THI), dicyclopentadiene, dipentene, vinyltoluene, and dicyclopentene. . Furthermore, an oligomer of dicyclopentadiene (2-5 mer mixture) can also be used as a sulfur modifier. Mixing of the sulfur and the sulfur modifier is performed in a state where the sulfur is melted, that is, at a temperature of 119 ° C. or higher, and the produced modified sulfur is also kept in the molten state.

  The obtained modified sulfur is mixed with fine powder heated to a predetermined temperature (for example, 150 ° C.) or higher to obtain a modified sulfur intermediate material. As the fine powder, one or more of coal ash, silica fume, glass powder, fuel incineration ash, electrostatic dust ash, and shell pulverized powder can be selected.

  The obtained modified sulfur intermediate material is mixed with the coarse aggregate and the fine aggregate while being maintained at a temperature capable of maintaining a molten state (for example, a temperature of 119 ° C. or higher). The coarse aggregate and the fine aggregate are heated to about 120 to 130 ° C., for example. The type of coarse aggregate and fine aggregate is not particularly limited as long as it can be used as an aggregate, and aggregates generally used for concrete can be used. Such aggregates include natural stone, sand, rubble, dredged sand, steel slag, ferronickel slag, copper slag, by-products generated during metal production, coal ash, fuel incineration ash, electrostatic dust ash, molten One or more selected from the group consisting of slags, shells, and mixtures thereof can be used.

  The particle size of the coarse aggregate is preferably 5 mm or more. Moreover, it is preferable that the upper limit of the particle size of coarse aggregate is 50 mm or less. When the particle size of the coarse aggregate exceeds 50 mm, there is a possibility that mechanical troubles may occur in kneading with the modified sulfur intermediate material. The particle size of the fine aggregate is usually 5 mm or less. Known techniques can be used to adjust the particle size of the coarse and fine aggregates.

  For mixing the modified sulfur intermediate material, the coarse aggregate and the fine aggregate, a kneading apparatus capable of receiving and kneading them and maintaining the interior at a predetermined temperature (for example, 119 ° C.) or higher is used. it can.

  The modified sulfur material is obtained by mixing the modified sulfur intermediate material with the coarse aggregate and the fine aggregate. The obtained modified sulfur material is put into the stirring tank 2 from the hopper 4 in a molten state, and is transported to the construction site in a molten state. At the construction site, the modified sulfur material transported by the cooker car 1 is used as it is.

  By making it possible to transport the modified sulfur material in a molten state, it is not necessary to perform additional processing such as remelting and mixing in order to obtain a molten modified sulfur material. As a result, there is no need to install equipment for additional processing at the construction site, so that the installation man-hours and installation costs can be reduced.

  In the above-described embodiment, the case where the heat medium chamber 2c is arranged in the lower portion of the stirring tank 2 and the modified sulfur material is heated from below the material storage chamber 2b has been described as an example, but the side wall of the material storage chamber 2b is described. In order to heat the modified sulfur material more uniformly, it is preferable that the modified sulfur material can be heated.

  FIG. 3 shows a cross-sectional view of another form of a stirring vessel configured to allow heating from the side walls. The stirring tank 12 shown in FIG. 3 can be mounted on the cooker vehicle 1 in place of the stirring tank 2 shown in FIG. 1, and is divided into an upper material storage chamber 12b and a lower heating medium chamber 12c by a partition wall 12a. Similar to the stirring tank 2 shown in FIG.

  The stirring tank 12 of this embodiment further has a heat medium jacket 18. The heat medium jacket 18 is provided on the inner surface of the side wall of the material storage chamber 12b over the entire circumference. The heat medium jacket 18 is provided with a heat medium flow path 18a communicating with the heat medium chamber 12c, and the heat medium fluid includes a heat medium tank (not shown) of the heating device, the heat medium chamber 12c, and the heat medium. It freely circulates between the flow paths 18a.

  With the above configuration, the modified sulfur material accommodated in the material accommodation chamber 12b is heated not only from below but also from the side. As a result, the modified sulfur material in the material storage chamber 12b can be heated more uniformly.

  In the configuration shown in FIG. 3, the example in which the heat medium jacket 18 is provided on the inner surface of the material storage chamber 12 b is shown, but a flow path for the heat medium may be formed in the side wall of the stirring tank 12. Further, the flow path for the heat medium may be constituted by a pipe.

  Moreover, in each form mentioned above, although the heating apparatus had a heat-medium tank and showed the example which heats the heat-medium fluid of a heat-medium chamber indirectly by heating the heat-medium fluid in a heat-medium tank, A heater may be installed as a heating device below the heat medium chamber 2c, and the heat medium chamber may be directly heated from below by the heater. Even with such a configuration, natural convection of the heat transfer fluid occurs in the heat transfer chamber and the temperature in the heat transfer chamber becomes substantially uniform, so that the entire lower surface of the material storage chamber is heated uniformly, resulting in the modified sulfur. The material is heated uniformly.

It is a side view of the cooker car by one embodiment of the present invention. It is the top view and longitudinal cross-sectional view of the stirring tank shown in FIG. It is sectional drawing which shows the other example of the stirring tank applicable to this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cooker wheel 2,12 Agitation tank 2a, 12a Partition wall 2b, 12b Material storage chamber 2c, 12c Heat medium chamber 3 Agitation blade 3a Agitation blade drive device 4 Hopper 5 Chute 6 Deodorizing device 7 Heating device 7a Heat medium tank 7b Heater 7c 7d Connecting pipe 18 Heat medium jacket 18a Heat medium flow path

Claims (5)

A modified sulfur material transport vehicle for transporting modified sulfur material using sulfur as a raw material,
A tank containing the modified sulfur material;
A heating device for heating the modified sulfur material in the tank to a temperature at which the modified sulfur material does not solidify;
Have
The inside of the tank is partitioned into a material storage chamber that stores the modified sulfur material, and a heat medium chamber that is located under the material storage chamber and stores a heat transfer fluid,
The heating device is a vehicle for transporting a modified sulfur material having a heater for heating the heat medium fluid accommodated in the heat medium chamber.   The vehicle for transporting modified sulfur material according to claim 1, wherein the heating device includes the heater and a heat medium tank disposed above the heater and connected to the heat medium chamber.   The vehicle for transporting modified sulfur material according to claim 1 or 2, wherein a heat medium flow path communicating with the heat medium chamber is provided in a side wall portion of the tank.   The vehicle for transporting modified sulfur material according to claim 1 or 2, wherein an inner surface of the tank is made of a material having corrosion resistance to sulfur.   The modified sulfur material transportation according to any one of claims 1 to 4, further comprising a deodorizing device that removes odor from the gas generated in the tank by the modified sulfur material and exhausts the gas outside the tank. For vehicles.

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