JP4531626B2 - Modified sulfur intermediate material flake manufacturing method and manufacturing system thereof - Google Patents

Description

  The present invention is produced by mixing modified sulfur modified with a sulfur modifier and aggregate, can be used as a material for civil engineering or construction, can be stored as a non-hazardous material, and is easy to transport and handle. The present invention relates to a method for producing modified sulfur intermediate material flakes and a production system thereof.

  In recent years, attention has been paid to the property of sulfur, which is solid at room temperature and melts into a fluid state when heated to a predetermined temperature or more, and melts when it exceeds about 119 ° C. Attempts have been made to mix these samples and use them as materials for civil engineering and construction. The sulfur material using sulfur is sometimes referred to as sulfur concrete or sulfur solidified material because its finish and handling are apparently similar to ordinary concrete using cement (see, for example, Patent Document 1).

Sulfur materials are known as materials that have higher strength, better water barrier properties, and higher acid resistance than concrete. However, since sulfur is ignitable and treated as a hazardous material, it is melted and beaten on site. It is difficult to install. However, in the case of large marine structures (fish reefs, algae reefs, wave-dissipating blocks, etc.) and revetment structures, it is necessary to produce sulfur materials near the site of use. Therefore, in order to improve such a situation, it has been attempted to produce modified sulfur by mixing and modifying a sulfur modifier as an additive to molten sulfur (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 2004-160693 JP 2005-82475 A

  However, the above-described sulfur and additives used for sulfur modification (sulfur modifiers) are dangerous and difficult to transport, and the manufacturing apparatus needs to be an explosion-proof device. In addition, storage of sulfur at the production site requires a dedicated molten sulfur tank. Therefore, in order to use the sulfur material, the cost of transportation and manufacturing becomes high.

  Further, as described in Patent Document 2, the modified sulfur and fine aggregate are mixed to produce a molten modified sulfur intermediate material, or the molten modified sulfur intermediate material and It has been proposed to produce a modified sulfur solidified body by mixing and solidifying with coarse aggregate. Although this modified sulfur intermediate material and modified sulfur solidified material are treated as non-hazardous materials, since it is necessary to handle sulfur in a molten state at the time of production, the production system is a place where the molten sulfur material is stored. And all the facilities of the flowing piping system must be constantly heated to 119 ° C. or more, which is the solidification point of the molten sulfur. However, in the production of the present modified sulfur solidified body, a production system that always warms the entire equipment where the molten sulfur material is stored and flows to a predetermined temperature or higher is not provided. Therefore, the modified sulfur solidified product cannot be produced safely and easily.

  Furthermore, the melted modified sulfur intermediate material is not easy to store and transport, and is inconvenient to handle, but the melted modified sulfur intermediate material is a thin plate that is easy to store, transport and handle. The manufacturing method and manufacturing system which form in a shape or flake are not provided. Therefore, no one can use the modified sulfur intermediate material safely and easily.

  Therefore, the present invention addresses such problems, and an object thereof is to provide a method for producing modified sulfur intermediate material flakes that can be stored as non-dangerous goods and can be easily transported and handled, and a production system thereof. To do.

  In order to achieve the above object, the method for producing a modified sulfur intermediate material flake according to the present invention is a state in which sulfur in a molten state and a sulfur modifier for modifying the molten sulfur are heated to a first predetermined temperature or higher. The step of producing modified sulfur by mixing in step, and the step of producing the modified sulfur intermediate material by mixing the produced modified sulfur and the aggregate in a state of being heated to the second predetermined temperature or higher. Storing the manufactured modified sulfur intermediate material in a storage tank and storing it at a third predetermined temperature lower than the second predetermined temperature; and promoting solidification of the stored modified sulfur intermediate material The step of lowering the temperature to a fourth predetermined temperature lower than the third predetermined temperature while being housed in the tank and stirring, and the endless endurance for rotating and moving the modified sulfur intermediate material between the two sites separated by a predetermined distance A step of continuously flowing a predetermined amount on a belt-shaped metal belt; In the first half of the rotational movement distance of the metal belt, the metal belt is heated from the back side with hot water, and in the second half, the metal belt is cooled from the back side with cold water. The step of producing a thin plate material by cooling and solidifying the solid sulfur intermediate material and the step of crushing the produced thin plate material into a flake shape are performed.

  By such a method, the sulfur in the molten state and the sulfur modifier that modifies the molten sulfur are mixed in a state of being heated to a temperature equal to or higher than the first predetermined temperature to produce modified sulfur. The modified sulfur and the aggregate are mixed in a state of being heated to the second predetermined temperature or more to produce a modified sulfur intermediate material, and the produced modified sulfur intermediate material is stored in a storage tank. Stored at a third predetermined temperature lower than the second predetermined temperature, stored in the solidification promoting tank and stirred and stored at the fourth predetermined temperature lower than the third predetermined temperature. A predetermined amount of the modified sulfur intermediate material with the temperature lowered is continuously flowed down on the endless belt-shaped metal belt that rotates and moves between two parts separated by a predetermined distance, and the metal belt rotates and moves. In the first half of the distance, the metal belt is heated with warm water from the back side, and in the second half By cooling the metal belt with cold water from the rear side, the modified sulfur intermediate material on the metal belt is cooled and solidified to produce a thin plate material, and the produced thin plate material is crushed to flakes. The shape.

  Moreover, the temperature which heats this metal belt with warm water from the back side in the first half part of the rotational movement distance of the said metal belt shall be 50-70 degreeC. This facilitates the cooling and solidification of the modified sulfur intermediate material on the metal belt.

  The modified sulfur intermediate material flake manufacturing system according to the present invention includes a molten sulfur tank that accommodates molten sulfur inside and heats the internal contents to a predetermined temperature or higher, and a sulfur modification that modifies the molten sulfur. A sulfur modifier tank that contains the quality agent inside, and the molten sulfur from the molten sulfur tank and the sulfur modifier from the sulfur modifier tank are received and mixed to produce modified sulfur, A modified sulfur production tank that heats the contents to a predetermined temperature or higher, an aggregate hot bottle that accommodates the aggregate inside and heats the internal contents to a predetermined temperature or more, and the modified sulfur production tank A modified sulfur intermediate material tank that receives and mixes the modified sulfur and the aggregate from the aggregate hot bottle to produce a modified sulfur intermediate material and heats the internal contents above a predetermined temperature, and the modified Sulfur intermediate A storage tank for storing the modified sulfur intermediate material from the material tank and maintaining the internal contents at a predetermined temperature, and the modified sulfur intermediate material from the storage tank being stored and stirred, and less than the predetermined temperature A solidification promoting tank that is lowered to a predetermined amount, and a predetermined amount of the modified sulfur intermediate material whose temperature is lowered in the solidification promoting tank is continuously flowed down, and an endless belt-like shape that rotates and moves between two parts separated by a predetermined distance A metal belt is provided, and the metal belt is heated with hot water from the back side in the first half of the rotational movement distance of the metal belt, and the metal belt is also cooled with cold water from the back side in the second half. A thin plate-like material forming device that cools and solidifies the modified sulfur intermediate material on the metal belt to form a thin plate-like material, and a crusher that crushes the formed thin plate-like material into a flake shape. Comprising the above-mentioned molten sulfur The piping system for connecting the respective devices from the tank up to the storage tank to each other, is obtained by adding a heating means for heating the interior of the liquid material to a predetermined temperature or higher.

  With such a configuration, the molten sulfur is accommodated in the molten sulfur tank, and the internal contents are heated to a predetermined temperature or higher, and the sulfur modifier for modifying the molten sulfur is added to the sulfur modifier tank. Accommodated inside, the modified sulfur production tank accepts and mixes the molten sulfur from the molten sulfur tank and the sulfur modifier from the sulfur modifier tank to produce reformed sulfur and accommodates the interior The material is heated to a predetermined temperature or higher, the aggregate is stored inside by an aggregate hot bottle, and the internal storage is heated to a predetermined temperature or higher. The modified sulfur and the aggregate from the aggregate hot bottle are received and mixed to produce a modified sulfur intermediate material, and the contents contained therein are heated to a predetermined temperature or more, and the modified sulfur intermediate material tank is stored in a storage tank. Modified sulfur from The material is accommodated inside and the internal contents are maintained at a predetermined temperature, and the modified sulfur intermediate material from the storage tank is accommodated and stirred in the solidification promoting tank, and the solidification promoting tank is lowered below the predetermined temperature. A predetermined amount of the modified sulfur intermediate material whose temperature has been lowered in the above is continuously formed on an endless belt-like metal belt provided so as to rotate and move between two parts separated by a predetermined distance by a thin plate material forming apparatus. In the first half of the rotational movement distance of the metal belt, the metal belt is heated by hot water from the back side, and in the second half, the metal belt is also cooled by cold water from the back side. After cooling, the modified sulfur intermediate material on the metal belt is cooled and solidified to form a thin plate-like material, and the formed thin plate-like material is crushed by a crusher to obtain a flake shape. At this time, the fluid inside the piping system is heated to a predetermined temperature or higher by heating means added to the piping system that interconnects the devices from the molten sulfur tank to the storage tank. Thus, in the production of the modified sulfur intermediate material flakes, all the facilities in which the molten sulfur material is stored and flowed are always heated above a predetermined temperature.

  The predetermined temperature for heating is 119 ° C. or higher. As a result, in the production of the modified sulfur intermediate material flakes, the entire equipment is always heated to 119 ° C. or higher, which is the solidification point of the molten sulfur.

  According to the first aspect of the present invention, in the production of the modified sulfur intermediate material flakes, all the equipment in which the molten sulfur material is stored and flows can be always heated above a predetermined temperature. Accordingly, it is possible to handle sulfur or modified sulfur in a molten state during production. Moreover, it can form in the shape of a thin plate or flakes that are easy to store, transport and handle. From this, it is possible to produce modified sulfur intermediate material flakes that can be stored as non-hazardous materials and can be easily transported and handled.

  According to the invention of claim 2, the temperature at which the metal belt is heated with hot water from the back side in the first half of the rotational movement distance of the metal belt is set to 50 to 70 ° C. The modified sulfur intermediate material on the belt can be easily cooled and solidified.

  According to the third aspect of the present invention, in the production of the modified sulfur intermediate material flakes, all the facilities in which the molten sulfur material is stored and flowed can always be heated above a predetermined temperature. Accordingly, it is possible to handle sulfur or modified sulfur in a molten state during production. Moreover, it can form in the shape of a thin plate or flakes that are easy to store, transport and handle. From this, it is possible to safely and easily produce modified sulfur intermediate material flakes that can be stored as non-hazardous materials and can be easily transported and handled.

  Moreover, according to the invention which concerns on Claim 4, in manufacture of modified sulfur intermediate material flakes, all the facilities can always be heated to 119 degreeC or more which is a solidification point of molten sulfur. Therefore, sulfur or modified sulfur can be handled in a molten state when the modified sulfur intermediate material flakes are produced.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 1 is a diagram showing an embodiment of a modified sulfur intermediate material flake production system according to the present invention. This modified sulfur intermediate material flake production system is manufactured by mixing modified sulfur modified with sulfur modifier and aggregate, can be used as civil engineering or construction material, and can be stored as non-hazardous material To produce modified sulfur intermediate material flakes that are easy to transport and handle, including a molten sulfur tank 1, a sulfur modifier tank 2, a modified sulfur production tank 3, an aggregate hot bottle 4, and a modified sulfur. It comprises an intermediate material tank 5, a storage tank 6, a solidification promoting tank 7, a thin plate material forming device 8, and a crusher 8a.

  The molten sulfur tank 1 accommodates molten sulfur inside and warms the internal contents (molten sulfur) to a predetermined temperature (for example, 119 ° C.) or higher. Sulfur is ordinary sulfur alone, and examples thereof include natural products or sulfur produced by desulfurization of petroleum or natural gas. The molten sulfur is melted at a temperature of 150 ° C., for example, and is supplied into the molten sulfur tank 1 through a supply pipe 9 from a tank lorry (not shown). And this molten sulfur tank 1 is made into the jacket type structure, and the heating means which heats internal molten sulfur is added. That is, a first heating medium heater 10 is provided outside the molten sulfur tank 1, and water or other heating medium is heated with an electric heater or the like, and the heated heating medium is supplied to the supply line 11 and reflux. A line 12 supplies the jacketed structure of the molten sulfur tank 1.

  The sulfur modifier tank 2 contains therein a sulfur modifier that modifies the molten sulfur. To modify molten sulfur is to polymerize sulfur with a sulfur modifier, for example. Examples of the sulfur modifier include, for example, dicyclopentadiene (DCPD), tetrahydroindene (THI), or cyclopentadiene and oligomers thereof (2 to 5 mer mixture), olefins such as dipentene, vinyltoluene, and dicyclopentene. One kind or a mixture of two or more kinds of compounds may be mentioned.

  The modified sulfur production tank 3 receives and mixes the molten sulfur from the molten sulfur tank 1 and the sulfur modifier from the sulfur modifier tank 2 to produce modified sulfur, and contains the internal contents (modified Warm sulfur) is heated to a predetermined temperature (for example, 119 ° C.) or higher. A supply pipe 13 from the molten sulfur tank 1 and a supply pipe 14 from the sulfur modifier tank 2 are connected to the ceiling of the modified sulfur production tank 3 and mixed inside the tank. For example, a bowl-shaped rotary blade 15 is provided as a stirring means. The modified sulfur produced here is obtained by polymerizing sulfur with the sulfur modifier, and is preferably a reaction product of sulfur and the sulfur modifier. The reformed sulfur production tank 3 has a jacket structure, and a heating means for heating the reformed sulfur inside is added. That is, the supply line 11 and the reflux line 12 from the first heat medium heater 10 are connected to the reformed sulfur production tank 3, and the heat medium heated by the first heat medium heater 10 is The supply line 11 and the reflux line 12 are supplied to the jacket type structure portion of the modified sulfur production tank 3.

  The aggregate hot bin 4 accommodates the aggregate inside and heats the internal contents (aggregate) to a predetermined temperature (for example, 150 ° C.) or higher. The aggregate is not particularly limited as long as it can be used as an aggregate, but is generally used in concrete, for example, natural stone, sand, rubble, dredged sand, steel slag, ferronickel slag, copper slag, and is produced during metal production. One type or two or more types selected from the group consisting of by-products, coal ash, fuel incineration ash, electrostatic dust collection ash, molten slags, shells, and mixtures thereof can be used. Silica fume, alumina, quartz powder, quartz rock, clay mineral, activated carbon, glass powder, and inorganic and organic aggregates that do not contain harmful substances equivalent to these can also be used. Among these aggregates, the group consisting of coal ash, silica sand, silica fume, quartz powder, sand, glass powder, and electrostatic dust ash is easy to obtain in a large amount with uniform adjustment of particle size distribution. One or more selected from the above are preferred. The aggregate is usually composed of an aggregate having a particle size of 5 mm or less, preferably 1 mm or less. When the aggregate particle size exceeds 5 mm, remelting cannot be performed quickly. A known technique can be used to adjust the particle size of the aggregate, and for example, it can be adjusted with a sieve or the like.

  When using coal ash as the aggregate, in FIG. 1, the coal ash accommodated in the coal ash silo 16 is put into a dry kiln 17 such as a rotary kiln and fired at, for example, 150 ° C. and dried. In particular, the transfer device is moved to a transfer pump 19 by a transfer device 18 such as a belt conveyor heated by an electric heater or the like, and is sent by pressure to the aggregate hot bottle 4 by the transfer pump 19. The aggregate hot bin 4 is also heated, for example, at the side wall by an electric heater or the like, and the internal aggregate is heated to about 150 ° C., for example.

  The modified sulfur intermediate material tank 5 receives and mixes the modified sulfur from the modified sulfur production tank 3 and the aggregate from the aggregate hot bottle 4 to produce a modified sulfur intermediate material, and also contains the internal contents. (Modified sulfur intermediate material) is heated to a predetermined temperature (for example, 119 ° C.) or higher. A supply pipe 20 from the modified sulfur production tank 3 and a supply pipe 21 from the aggregate hot bottle 4 are connected to the ceiling portion of the modified sulfur intermediate material tank 5. For example, a bowl-shaped rotary blade 15 is provided as a mixing and stirring means. Two rotating blades 22 that rotate at a high speed are also provided at the upper part inside the tank. This is because the dried aggregate of about 150 ° C. falling from the upper part of the tank to the inside of the tank is diffused and easily mixed with the previously supplied modified sulfur. This is because the material is mixed quickly and uniformly.

  The modified sulfur intermediate material tank 5 has a jacket structure, and a heating means for heating the internal modified sulfur intermediate material is added. In other words, the supply line 11 and the reflux line 12 from the first heating medium heater 10 are connected to the reformed sulfur intermediate material tank 5, and the heating medium heated by the first heating medium heater 10. Is supplied to the jacket-type structure portion of the reformed sulfur intermediate material tank 5 through the supply line 11 and the reflux line 12. Further, the aggregate from the aggregate hot bin 4 is supplied by the supply pipe 21 while being heated by the transfer device 18 ′ similar to the transfer device 18 described above.

  In the modified sulfur intermediate material produced here, the mixing ratio of the modified sulfur and the aggregate is, for example, 2: 1 or 1.5: 1. The viscosity of the modified sulfur intermediate material produced in this way is about 750 mPa · cm. In addition, in the modified sulfur intermediate material manufactured as described above, in order to satisfy the non-dangerous material verified by the small gas flame ignition test, for example, it is easier to achieve as the amount of aggregate is increased. And the piping equipment after the outlet piping 5a of the modified sulfur intermediate material tank 5 can be handled as a non-dangerous material and can avoid the restriction of the Fire Service Act.

  The storage tank 6 accommodates the modified sulfur intermediate material from the modified sulfur intermediate material tank 5 inside and maintains the internal contents (modified sulfur intermediate material) at a predetermined temperature (for example, around 120 ° C.). It is. The modified sulfur intermediate material from the modified sulfur intermediate material tank 5 is pumped at a temperature of about 140 ° C. through a supply pipe 23 continuously connected to the outlet pipe 5a, and once the storage tank 6 Stored infused into. As shown in FIG. 2, a rotating blade 24 is provided inside the storage tank 6 as a stirring means so as to stir the internal modified sulfur intermediate material.

  And the said storage tank 6 is made into the jacket type structure, and the heating means which heats internal reforming sulfur intermediate material is added. That is, as shown in FIG. 2, a second heat medium heater 25 is provided outside the storage tank 6, and water or other heat medium is heated by an electric heater or the like, and the heated heat medium is A supply line 26 and a reflux line 27 are used to supply the jacket type structure of the storage tank 6. By supplying the heat medium from the heat medium heater 25, the inside of the storage tank 6 can be set to an arbitrary temperature. At this time, a cooling device with water at room temperature may be installed so that the temperature of the modified sulfur intermediate material accommodated in the storage tank 6 is approximately 120 ° C. The reason for this is to form a seed crystal for solidifying the modified sulfur intermediate material into a thin plate as described later.

  The solidification accelerating tank 7 accommodates and stirs the modified sulfur intermediate material from the storage tank 6 and lowers it below the predetermined temperature (for example, around 110 ° C.). The modified sulfur intermediate material adjusted to around 120 ° C. in the storage tank 6 is pumped by a supply pipe 28 and a pump 29 connected to the bottom of the storage tank 6, and a solidification promoting tank is supplied via the supply pipe 30. 7 is injected. Inside the solidification accelerating tank 7, as with the storage tank 6, rotating blades 24 are provided as stirring means, and the internal reformed sulfur intermediate material is vigorously stirred. This is to promote the formation of seed crystals for solidifying the modified sulfur intermediate material into a thin plate as described later, and to cool the temperature of the modified sulfur intermediate material to about 110 ° C.

  The thin plate-like material forming apparatus 8 is endlessly rotated and moved between two parts separated by a predetermined distance in response to a predetermined amount of the modified sulfur intermediate material whose temperature has been lowered in the solidification promoting tank 7 being continuously flowed down. A belt-shaped metal belt 31 (see FIG. 2) is provided, and the metal belt 31 is heated with warm water from the back side in the first half of the rotational movement distance of the metal belt 31, and from the back side in the second half as well. The metallic belt 31 is cooled with cold water (for example, water at room temperature), and the modified sulfur intermediate material on the metallic belt 31 is cooled and solidified to form a thin plate material. Here, the temperature at which the metallic belt 31 is heated with warm water from the back side in the first half of the rotational movement distance of the metallic belt 31 is set to 50 to 70 ° C., for example.

  Specifically, as shown in FIG. 2, a first pulley or sprocket 32a and a second pulley or sprocket 32b are provided at two sites separated by a predetermined distance (for example, 7 to 12 m). A metal belt 31 such as a steel belt is stretched between the second pulleys or sprockets 32a and 32b. The metal belt 31 has no joints and is stretched with high tension. A hot water supply unit 33 is provided below the first half (for example, 3 to 6 m) of the rotational movement distance of the metal belt 31, and a pipe 33 a from the hot water supply unit 33 extends to the upper back surface of the metal belt 31. The hot water is jetted to the upper back surface of the metal belt 31 from the jet pipe 33b at the tip. Further, a cold water supply unit 34 is provided below the latter half of the rotational movement distance of the metal belt 31 (for example, 4 to 6 m behind the front half), and a pipe 34a from the cold water supply unit 34 is made of metal. It extends to the upper back surface of the belt 31, and cold water is jetted from the jet pipe 34 b at the tip of the belt 31 to the upper back surface of the metal belt 31. An apparatus using the metal belt 31 having such a structure is called a steel belt system.

  On the upper surface of the metal belt 31 on the first pulley or sprocket 32a side, a predetermined amount of the modified sulfur intermediate material whose temperature has been lowered in the solidification accelerating tank 7 flows down continuously through the on-off valve 35. This is received by the metal belt 31. A solidification promoting bar 36 formed, for example, in a roller shape is provided in the width direction of the metal belt 31 immediately behind the rotational movement direction of the metal belt 31 where the on-off valve 35 is located. The solidification promoting bar 36 is moved up and down as shown by an arrow by a lifting device (not shown) so that the height can be adjusted. The thickness of the thin plate material formed by cooling and solidifying on the metal belt 31 is adjusted. It comes to adjust.

  The solidification promoting bar 36 has a double structure, and a heating means for heating the surface temperature is added. That is, the supply line 37 and the reflux line 38 from the second heat medium heater 25 are connected to the solidification promoting bar 36, and the heat medium heated by the second heat medium heater 25 is supplied to the supply line. 37 and the reflux line 38 are supplied to the double structure portion of the solidification promoting bar 36, and the solidification promoting bar 36 is heated to, for example, about 130 to 140 ° C.

  The crusher 8a crushes the thin plate material formed by the thin plate material forming device 8 into a flake shape. For example, the crusher 8a has a structure in which plate-like blades are radially attached to the outer peripheral surface of the rotating shaft. ing. One piece of the modified sulfur intermediate material crushed into flakes is about 3 to 5 cm, for example, but the size of the crushed modified sulfur intermediate material is to change the shape of the blade of the crusher 8a. Can be adjusted in any way.

  In such a structure of the entire system, all the piping systems interconnecting the respective devices from the molten sulfur tank 1 to the storage tank 6 have a double structure, and an internal fluid is predetermined in the piping system. A heating means for heating to a temperature (for example, 119 ° C.) or higher is added. That is, a third heat medium heater 42 is provided outside the molten sulfur tank 1, and water or other heat medium is heated with an electric heater or the like, and the heated heat medium is supplied to the supply line 43 and reflux. The line 44 supplies molten sulfur supply pipe 9 to the molten sulfur tank 1, molten sulfur supply pipe 13 from the molten sulfur tank 1 to the modified sulfur production tank 3, and reformed sulfur from the modified sulfur production tank 3. The modified sulfur supply pipe 20 to the intermediate material tank 5 and the modified sulfur intermediate material supply pipe 23 from the modified sulfur intermediate material tank 5 to the storage tank 6 are supplied. As a result, in the modified sulfur intermediate material flake production system, the sulfur material being produced is always heated above the solidification point of sulfur, and the modified sulfur intermediate material flake can be produced safely and easily.

  In addition, although not shown in FIG. 1, in the above-described modified sulfur intermediate material flake manufacturing system, nitrogen gas is supplied to a portion in which the molten sulfur, modified sulfur, or modified sulfur intermediate material is accommodated. A nitrogen gas generator may be added. In this case, sealing or purging with nitrogen gas, which is an inert gas, can prevent sulfur oxidation and prevent generation of hydrogen sulfide.

  Next, a method for producing modified sulfur intermediate material flakes using the modified sulfur intermediate material flake production system configured as described above will be described. In FIG. 1, first, molten sulfur is accommodated in the molten sulfur tank 1 and the molten sulfur inside is heated to a predetermined temperature (eg, 119 ° C.) or higher. On the other hand, a sulfur modifier for modifying the molten sulfur is accommodated in the sulfur modifier tank 2.

  In this state, the molten sulfur sent from the molten sulfur tank 1 through the supply pipe 13 and the sulfur modifier sent from the sulfur modifier tank 2 through the supply pipe 14 are received by the modified sulfur production tank 3. While mixing and producing modified sulfur, the internal modified sulfur is heated to a first predetermined temperature (eg, 119 ° C.) or higher. On the other hand, the aggregate hot bin 4 accommodates the aggregate and warms the internal aggregate to a predetermined temperature (for example, 150 ° C.) or higher.

  Next, the modified sulfur delivered from the modified sulfur production tank 3 through the supply pipe 20 and the aggregate delivered from the aggregate hot bottle 4 through the supply pipe 21 are received by the modified sulfur intermediate material tank 5 and mixed. The modified sulfur intermediate material is manufactured, and the internal modified sulfur intermediate material is heated to a second predetermined temperature (for example, 140 ° C.) or higher. The modified sulfur intermediate material thus manufactured is treated as a non-hazardous material, and the piping equipment after the outlet pipe 5a of the modified sulfur intermediate material tank 5 can avoid the fire laws.

  Next, the modified sulfur intermediate material sent out from the modified sulfur intermediate material tank 5 through the outlet pipe 5a and the supply pipe 23 is accommodated in the storage tank 6, and the internal modified sulfur intermediate material is stored in the second modified sulfur intermediate material. The temperature is stored after being lowered to a third predetermined temperature (for example, around 120 ° C.) lower than the predetermined temperature (for example, 140 ° C.). This is to form a seed crystal for solidifying the modified sulfur intermediate material into a thin plate as described later.

  Thereafter, the modified sulfur intermediate material is pumped from the storage tank 6 by the supply pipe 28 and the pump 29 and is injected and accommodated into the solidification promoting tank 7 through the supply pipe 30. Then, the internal modified sulfur intermediate material is vigorously stirred by the rotating blades 24 in the solidification promoting tank 7. This promotes the formation of seed crystals for solidifying the modified sulfur intermediate material into a thin plate as will be described later, and the temperature of the modified sulfur intermediate material is set to a third predetermined temperature (for example, around 120 ° C.). This is because the temperature is lowered to a lower fourth predetermined temperature (for example, around 110 ° C.).

  In this state, the on-off valve 35 at the bottom of the solidification accelerating tank 7 is opened, and a predetermined amount of the modified sulfur intermediate material whose temperature has been lowered continuously flows down onto the metal belt 31. At this time, the modified sulfur intermediate material that has flowed down onto the metal belt 31 spreads in the width direction of the metal belt 31, but the solidification promoting bar 36 that has been adjusted to a predetermined height causes the above-mentioned metal The thickness of the thin plate material formed by cooling and solidifying on the belt 31 is adjusted. The thickness is about 3 to 5 mm, for example.

  2, in the first half of the rotational movement distance of the metal belt 31, the metal belt 31 is heated by the hot water sprayed from the back surface side by the hot water supply unit 33 (see FIG. 2). In the latter half, for example, 50 to 70 ° C., the metal belt 31 is cooled by cold water (for example, room temperature water) sprayed from the back side by the cold water supply unit 34, and the modified sulfur intermediate material on the metal belt 31. Is cooled and solidified to produce a thin plate material.

  Thereafter, the manufactured thin plate material is crushed with a crusher 8a to form a flake. One piece of this modified sulfur intermediate material flake is, for example, about 3 to 5 cm. In FIG. 1, the modified sulfur intermediate material flakes crushed by the crusher 8a are conveyed to a bagging facility (not shown) by, for example, a belt conveyor 39 in FIG. Packed.

The modified sulfur intermediate material flakes can be produced as described above, but the preferable production conditions for producing the thin plate material by cooling and solidifying the modified sulfur intermediate material are as follows.
(1) The outlet temperature of the storage tank 6 is around 120 ° C.
(2) The temperature of the modified sulfur intermediate material in the solidification promoting tank 7 is around 110 ° C.
(3) Stir the modified sulfur intermediate material in the solidification promoting tank 7 to form seed crystals.
(4) The range of the first half for heating the metal belt 31 is 3 to 6 m.
(5) The range of the second half part for cooling the metal belt 31 is 4 to 6 m behind the first half part.
(6) The temperature of warming with warm water from the back side in the first half of the metal belt 31 is 50 to 70 ° C.
(7) The rotational movement speed of the metal belt 31 should be adjusted according to the production amount in the range of 0.8 to 2.0 m / sec.

It is explanatory drawing which shows embodiment of the modified sulfur intermediate material flake manufacturing system by this invention. It is principal part explanatory drawing which shows the combined structure of the storage tank in the said modified sulfur intermediate material flake manufacturing system, a solidification promotion tank, a thin plate-shaped material formation apparatus, and a crusher.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Molten sulfur tank 2 ... Sulfur modifier tank 3 ... Modified sulfur production tank 4 ... Aggregate hot bottle 5 ... Modified sulfur intermediate material tank 6 ... Storage tank 7 ... Solidification promotion tank 8 ... Thin plate-shaped material formation apparatus 8a ... Crusher 10 ... first heating medium heater 11 ... heating medium supply line 12 ... heating medium reflux line 25 ... second heating medium heater 26, 37 ... heating medium supply line 27,38 ... of heating medium Reflux line 31 ... Metal belt 33 ... Hot water supply part 34 ... Cold water supply part 36 ... Solidification promoting bar 42 ... Third heating medium heater 43 ... Heating medium supply line 44 ... Heating medium reflux line

Claims (4)

A step of mixing the sulfur in a molten state and a sulfur modifier for modifying the molten sulfur in a state heated to a temperature equal to or higher than the first predetermined temperature to produce modified sulfur;
The step of producing the modified sulfur intermediate material by mixing the produced modified sulfur and the aggregate in a state heated to a second predetermined temperature or higher,
Storing the produced modified sulfur intermediate material in a storage tank and storing it at a third predetermined temperature lower than a second predetermined temperature; and
Storing the modified sulfur intermediate material stored in the solidification accelerating tank and stirring it and lowering it to a fourth predetermined temperature lower than a third predetermined temperature; and
A step of continuously flowing a predetermined amount of the modified sulfur intermediate material with the temperature lowered onto an endless belt-shaped metal belt that rotates and moves between two sites separated by a predetermined distance;
In the first half of the rotational movement distance of the metal belt, the metal belt is heated from the back side with hot water, and in the second half, the metal belt is cooled from the back side with cold water. Cooling and solidifying the sulfur intermediate material to produce a thin plate material,
Crushing the manufactured thin plate-like material into flakes,
A method for producing a modified sulfur intermediate material flake, characterized in that:   2. The modified sulfur intermediate material flake according to claim 1, wherein a temperature at which the metal belt is heated with warm water from the back side in the first half of the rotational movement distance of the metal belt is 50 to 70 ° C. 3. Production method. A molten sulfur tank for containing molten sulfur therein and heating the internal contents to a predetermined temperature or higher;
A sulfur modifier tank that contains therein a sulfur modifier that denatures the molten sulfur;
Reformed sulfur production in which molten sulfur from the molten sulfur tank and sulfur modifier from the sulfur modifier tank are received and mixed to produce modified sulfur, and the internal contents are heated to a predetermined temperature or higher. A tank,
An aggregate hot bin that houses the aggregate and heats the internal contents above a predetermined temperature;
Reformed sulfur that receives and mixes the modified sulfur from the modified sulfur production tank and the aggregate from the aggregate hot bottle to produce a modified sulfur intermediate material and heats the internal contents above a predetermined temperature. An intermediate material tank,
A storage tank for storing the modified sulfur intermediate material from the modified sulfur intermediate material tank and maintaining the internal contents at a predetermined temperature, and
A solidification accelerating tank that contains and stirs the modified sulfur intermediate material from the storage tank and lowers it below the predetermined temperature; and
In response to a predetermined amount of the modified sulfur intermediate material whose temperature has been lowered in the solidification accelerating tank being continuously flowed down, an endless belt-shaped metal belt that rotates and moves between two parts separated by a predetermined distance is provided, In the first half of the rotational movement distance of the metal belt, the metal belt is heated with hot water from the back side, and in the second half, the metal belt is also cooled with cold water from the back side so that the metal belt is over the metal belt. A sheet material forming apparatus for cooling and solidifying the modified sulfur intermediate material to form a sheet material;
Comprising a crusher that crushes the formed thin plate-like material into flakes,
The piping system interconnecting each device from the molten sulfur tank to the storage tank is added with a heating means for heating the internal fluid to a predetermined temperature or higher,
Modified sulfur intermediate material flake manufacturing system characterized by that.   The modified sulfur intermediate material flake production system according to claim 3, wherein the predetermined temperature for heating is 119 ° C or higher.

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