JP2007185642A - Method and apparatus for treating sulfate pitch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve the neutralization of sulfate pitch having a significantly high degree of acidity rationally in technique utilizing the burned product of a waste material so as to suppress the use of a substance originally useful in itself. <P>SOLUTION: A method for treating the sulfate pitch 2 comprises mixing the sulfate pitch 2 and the burned product 4 of the waste material 3 to neutralize the acidity of the sulfate pitch 2, and mixing the sulfate pitch 2 with the burned product 4 of this mixture 24 if an oil content in the mixture 24 of the sulfate pitch 2 and the burned product 4 is high. An apparatus for treating the sulfate pitch 1 comprises the sulfate pitch 2, a mixer 16 containing the burned product 4 of the waste material 3 to mix these, an introduction device 29 capable of introducing the sulfate pitch 2 in a container 27 into the mixer 16 by slantingly posturing the container 27 containing the sulfate pitch 2 and having an opening 26 on the top end so as to head the opening 26 below, and a solid substance shredder 40 capable of shredding the solid sulfate pitch 2 in the slantingly postured container 27. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sulfuric acid pitch processing method and a sulfuric acid pitch processing apparatus in which sulfuric acid pitch is neutralized by using wastes such as general waste and industrial waste.

  Recently, sulfuric acid is sometimes used for refining petroleum. In this case, a large amount of sulfuric acid pitch is generated after the refining. This sulfuric acid pitch has an acidity of, for example, pH 1 or less and is extremely high, so it cannot be discarded as it is. Therefore, conventionally, as shown in Patent Documents 1 and 2 below, methods for neutralizing sulfuric acid pitch have been proposed.

That is, according to the thing of the said patent document 1, the acidity of the said sulfuric acid pitch is neutralized by mixing a clay mineral with a sulfuric acid pitch. Moreover, according to the thing of the said patent document 2, the acidity of the said sulfuric acid pitch is neutralized by mixing a cement-type solidification agent with a sulfuric acid pitch.
JP-A-2005-193108 Japanese Patent Laid-Open No. 2002-180067

  By the way, in each of the above conventional techniques, clay minerals or cement-based solidifying agents are used to neutralize the sulfuric acid pitch. However, these are substances that are useful in their own right. For this reason, when using the clay mineral or cement-based solidifying agent for the purpose of neutralizing the sulfuric acid pitch, it is difficult to say that these useful substances are beneficially used. There is a problem.

  On the other hand, general waste and industrial waste, which are considered to be simply discarded, are generally baked and made chemically stable in terms of environmental protection, and then subgrade, roadbed materials, etc. It is reused for civil engineering materials and cement products. However, recently, it has been desired that the fired product can be used more effectively.

  The present invention has been made by paying attention to the above-described circumstances, and the object of the present invention is to provide a baked product of waste so as to suppress the use of a substance that is originally considered to be useful. Utilizing it, the neutralization treatment of sulfuric acid pitch with very high acidity is to be reasonably achieved in the art.

  According to the first aspect of the present invention, the acidity of the sulfuric acid pitch 2 is neutralized by mixing the sulfuric acid pitch 2 and the fired product 4 of the waste 3.

  In the invention of claim 2, in addition to the invention of claim 1, when there is a large amount of oil in the mixture 24 of the sulfuric acid pitch 2 and the fired product 4, the mixture 24 is fired to obtain the fired product 4, and this firing The product 4 is mixed with the sulfuric acid pitch 2 described above.

  The invention of claim 3 is such that in addition to the invention of claim 1 or 2, the mixture 24 is mixed with the neutralizing agent 6.

  The invention of claim 4 includes a mixer 16 that contains the sulfuric acid pitch 2 and the fired product 4 of the waste 3 and mixes them, and a container 27 that contains the sulfuric acid pitch 2 and has an opening 26 at its upper end. An inlet 29 for allowing the sulfuric acid pitch 2 in the container 27 to be introduced into the mixer 16 by inclining the opening 26 downward, and a solid sulfuric acid pitch 2 in the container 27 in the inclined attitude. Is provided with a solid material crusher 40 that enables crushing.

  In this section, the reference numerals appended to the above terms are not to be construed as limiting the technical scope of the present invention to the section “Example” described later or the contents of the drawings.

  The effects of the present invention are as follows.

  According to the first aspect of the present invention, the acidity of the sulfuric acid pitch is neutralized by mixing the sulfuric acid pitch and the fired product of waste.

  For this reason, the first “effect” is generated. That is, by using the baked product produced from the waste for neutralization of the sulfuric acid pitch, the neutralization treatment of the sulfuric acid pitch is a substance that is originally considered to be useful, such as a cement-based solidifying agent. In other words, it is possible to prevent consumption of substances that are inherently useful by effectively using the burned product of the waste.

  In addition, a second “effect” occurs. That is, the acidity of the sulfuric acid pitch is extremely high. On the other hand, the baked product that attempts to neutralize the acidity of the sulfuric acid pitch is an alkaline and chemically stable substance. For this reason, neutralizing the acidity of the sulfuric acid pitch with the baked product as described above is reasonably achieved technically.

  Moreover, the fired product has curability due to its properties. For this reason, even if the mixture after mixing and neutralizing the said sulfuric acid pitch and a baked product is discarded by landfill, for example, unnecessary softening of the ground is prevented. Therefore, the subsequent disposal of the mixture can be facilitated without causing inconveniences such as environmental degradation.

  In the invention of claim 2, when there is a large amount of oil in the mixture of the sulfuric acid pitch and the fired product, the mixture is fired to obtain a fired product, and the fired product is mixed with the sulfuric acid pitch.

  For this reason, it is more reliably prevented that the oil component in the neutralized mixture is unnecessarily diffused in the next step such as landfill disposal. Therefore, the expansion of environmental pollution based on sulfuric acid pitch is more reliably prevented.

  According to a third aspect of the present invention, a neutralizing agent is mixed with the mixture.

  For this reason, when the calcined product is insufficient for neutralization of the sulfuric acid pitch, the desired neutralization of the calcined product is more reliably achieved by mixing the neutralizing agent.

  The invention according to claim 4 is a mixer that contains sulfuric acid pitch and waste baked product and mixes them, and a container that contains sulfuric acid pitch and has an opening at the upper end thereof, and the opening is directed downward. A charging machine that allows the sulfuric acid pitch in the container to be charged into the mixing machine and a solid material crusher that can crush the solid sulfuric acid pitch in the container in the inclined position. Yes.

  For this reason, the same effect as the first and second “effects” based on [Claim 1] is produced.

  Moreover, even if there is a solid part in the sulfuric acid pitch accommodated in the container, it is crushed into small pieces by the solid material crusher, and the discharge from the container is more reliably achieved. Therefore, it is prevented that the sulfuric acid pitch remains in the container, and the sulfuric acid pitch and the fired product are more sufficiently mixed, and the neutralization treatment of the sulfuric acid pitch is more reliably achieved. .

  In the sulfuric acid pitch treatment method of the present invention, in order to suppress the use of a substance that is considered to be useful per se, a waste baked product is originally used, and the sulfuric acid pitch has a very high acidity. The best mode for carrying out the present invention is to mix sulfuric acid pitch with a calcined product of waste in order to realize the purpose that the sum treatment is reasonably achieved technically. The acidity of the sulfuric acid pitch is neutralized.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  In the figure, reference numeral 1 denotes a sulfuric acid pitch processing apparatus that performs processing such as neutralizing the sulfuric acid pitch 2.

  The sulfuric acid pitch processing apparatus 1 includes a storage tank 5 for storing the fired product 4 of the waste 3, a storage tank 7 for storing the neutralizing agent 6, and the fired product 4 from the outside of the sulfuric acid pitch processing apparatus 1. A receiving hopper 9 capable of receiving the neutralizing agent 6, and a conveying device for selectively conveying the fired product 4 or the neutralizing agent 6 in the receiving hopper 9 to any one of the storage tanks 5 and 7. 10 are provided.

  The waste 3 is general waste or industrial waste. The fired product 4 is obtained by firing the waste 3 in a roasting furnace 12 (or incinerator). When the waste 3 is heated to 1200-1300 ° C. by the roasting furnace 12, it melts into a glass shape, but is heated to 1000-1100 ° C., preferably about 1050 ° C. just before becoming glassy, and fired. Then, if this is cooled, a powdered fired product 4 is produced.

The calcined product 4 is alkaline having a pH of about 11 and is inferior to cement, but has curability (hydraulicity). Specifically, this calcined product 4 is composed of 10-20 wt% SiO, 20-30 wt% CaO, 7-12 wt% Al ₂ O ₃ , 3-5 wt% Fe ₂ O ₃ , Cl Is 5-7% by weight, P ₂ O ₅ is 3-4% by weight, SO ₃ is 7-11% by weight, and other materials including PbO, Cr ₂ O ₃ , Cd, etc. is there. The neutralizing agent 6 is slaked lime (Ca (OH) ₂ ) or the like.

  A crusher 14 for crushing the solidified sulfuric acid pitch 2; a hopper 15 for guiding the sulfuric acid pitch 2 toward the crusher 14; the sulfuric acid pitch 2 that has passed through the crusher 14; A mixer 16 is provided for containing the neutralizing agent 6 and mixing and stirring (kneading) these 2, 4 and 6.

  The mixer 16 is supported by the casing 18 so that the shaft center 17 is included in the casing 18 having a bottom and a cylindrical shape with a vertical orientation, and the casing 18 is rotatable about the shaft center 17. A rotor 19, an electric motor 20 that drives the rotor 19, and a gate-type valve 22 that can open and close a discharge port 21 formed at the bottom of the casing 18 are provided.

  By rotation of the rotor 19, the mixture 24 of the sulfuric acid pitch 2, the fired product 4, and the neutralizing agent 6 in the casing 18 is kneaded. The mixture 24 can be discharged to the outside through the discharge port 21 and the valve 22 that has been opened.

  A plurality of cylindrical containers 27 having an axial center 25 extending in the vertical direction and having an opening 26 at the upper end thereof are provided, and the sulfuric acid pitch 2 is accommodated in these containers 27. Specifically, each container 27 is a drum can. These containers 27 are raised from a “lower area” than the hopper 15 to an “upper area” than the hopper 15, where the sulfuric acid pitch 2 in the container 27 is passed through the hopper 15 and the crusher 14, A charging machine 29 that can be charged into the mixer 16 is provided.

  The container 27 is operated by the charging machine 29 as follows. That is, the container 27 (the chain line in FIG. 1) positioned in the “lower area” is raised A to the “upper area” so as to translate. Therefore, the container 27 is tilted B so that the opening 26 is positioned above the hopper 15 and the axis 25 is substantially horizontal so that the first inclined posture (solid line in each figure) is obtained. The Next, the container 27 is further tilted C so that the opening 26 enters the hopper 15 and the axis 25 is inclined downward (a two-dot chain line in FIG. 1). It is said. When the container 27 is in the first and second inclined postures, the sulfuric acid pitch 2 stored in the container 27 is put into the hopper 15. Next, the container 27 is returned to the original “lower area” by an operation reverse to that described above (the chain line in FIG. 1).

  A feeding conveyor 31 that sequentially feeds the containers 27 containing the sulfuric acid pitch 2 from the outer side of the “lower area” to the “lower area”, and an empty container 27 is sequentially sent from the “lower area” toward the outer side. A delivery conveyor 32 is provided.

  A charging machine 34 is provided to allow the fired product 4 stored in the storage tank 5 to be charged into the mixer 16, and the charging machine 34 is a rotary valve. A charging machine 35 is provided that allows the neutralizing agent 6 stored in the storage tank 7 to be charged into the mixer 16. The charging machine 35 includes a rotary valve and a screw conveyor. On the other hand, a transport conveyor 38 for transporting the mixture 24 discharged from the mixer 16 through the valve 22 to the container 37 is provided.

  A solid material crusher 40 is provided that enables the solid sulfuric acid pitch 2 in the container 27 in the first inclined posture to be crushed into small pieces.

  The solid material crusher 40 extends in the axial direction of the container 27 in the first inclined posture and is supported by a stationary member such as a building, and is guided by the guide body 41, and the axial direction of the container 27 Thus, the movable table 42 that can move forward and backward D and E, and rotate about the axis 25 of the container 27, and protrudes toward the opening 26 of the container 27. The rotary shaft 43 is supported by the movable base 42 and can be moved back and forth with the movable base 42, and is supported by the protruding end of the rotary shaft 43. A crushing body 45 that applies an impact force to the solid sulfuric acid pitch 2 in the container 27 and can crush it, and an actuator 46 that is an electric motor that drives the rotating shaft 43 are provided. Various types of the crushed body 45 can be selected, and are detachably attached to the rotating shaft 43.

  Moreover, the injection nozzle 49 which injects the water 48 toward the inside of the container 27 in the said 2nd inclination attitude | position and wash | cleans this inside is provided.

  The processing operation of the sulfuric acid pitch 2 by the sulfuric acid pitch processing apparatus 1 will be described.

  First, the container 27 containing the sulfuric acid pitch 2 is raised A from the feeding conveyor 31 by the feeding device 29 and tilted B to be in the first inclined posture (solid line in each figure). Then, the sulfuric acid pitch 2 in the container 27 starts to be fed into the crusher 14 through the hopper 15. Here, the rotating shaft 43 and the pulverized body 45 are rotated and moved forward D together with the movable base 42, so that the solid sulfuric acid pitch 2 in the container 27 is crushed. Then, the sulfuric acid pitch 2 crushed into small pieces is put into the crusher 14 through the hopper 15.

  Next, the container 27 is further tilted C by the charging device 29 to be in the second inclined posture (two-dot chain line in FIG. 1). Then, almost all of the sulfuric acid pitch 2 in the container 27 is put into the crusher 14 through the hopper 15. Here, water 48 is jetted into the container 27 by the jet nozzle 49. Then, the sulfuric acid pitch 2 in the container 27 is put into the crusher 14 together with the water 48.

  When the input of the sulfuric acid pitch 2 in the container 27 to the crusher 14 is completed, the empty container 27 is returned to the original position by the input machine 29 (the chain line in FIG. 1), and here, the delivery conveyor 32 Is sent to the next process. Next, the same operation as described above is repeated for the next container 27 on the feed conveyor 31.

  The sulfuric acid pitch 2 charged into the crusher 14 is further crushed into small pieces and charged into the mixer 16. On the other hand, the fired product 4 and the neutralizing agent 6 are charged into the mixer 16 by the operation of the charging machines 34 and 35. The mixer 16 kneads the sulfuric acid pitch 2, the fired product 4, the neutralizing agent 6, and the mixture 24 of water 48. In this way, the acidity of the sulfuric acid pitch 2 is neutralized by the fired product 4 and the neutralizing agent 6. In this neutralization, the pH of the mixture 24 is preferably 5.5 to 8.5, more preferably 6.7 to 7.5, and even more preferably 7. In addition, in order to neutralize the acidity of the sulfuric acid pitch 2, the input of the fired product 4 is prioritized over the neutralizer 6. For this reason, if the quantity of the baked product 4 with respect to the sulfuric acid pitch 2 is sufficient, the said neutralizing agent 6 will be made into a little quantity, or it will not be thrown in by that much.

  When the desired neutralization of the sulfuric acid pitch 2 is completed, the valve 22 is opened, and the mixture 24 in the mixer 16 is discharged and transported by the transport conveyor 38. Here, when the oil content in the mixture 24 is large and, for example, the mass% is approximately 5 or more, the mixture 24 is baked by the roasting furnace 12 (or incinerator) to be a baked product 4. The fired product 4 is stored in the storage tank 5 in the same manner as described above, and is used for neutralization of the sulfuric acid pitch 2. On the other hand, when the oil content of the mixture 24 is small, it is stored in the container 37. Then, the mixture 24 in the container 37 is disposed of by landfill. In addition, the baked product 4 of the mixture 24 containing a large amount of the oil may be partly or wholly disposed of by landfill or may be reused as a civil engineering material. In addition, the mixture 24 may be disposed of by incineration in a firing furnace and landfill.

  According to the said structure, the sulfuric acid pitch 2 and the baked product 4 of the waste 3 are mixed, and the acidity of the said sulfuric acid pitch 2 is neutralized.

  For this reason, the first “effect” is generated. That is, by using the calcined product 4 produced by the waste 3 for neutralization of the sulfuric acid pitch 2, the neutralization treatment of the sulfuric acid pitch 2 is inherently useful in itself such as a cement-based solidifying agent. In other words, the effective use of the baked product 4 of the waste 3 can prevent the consumption of the originally useful substance.

  In addition, a second “effect” occurs. That is, the acidity of the sulfuric acid pitch 2 is extremely high. On the other hand, the calcined product 4 that attempts to neutralize the acidity of the sulfuric acid pitch 2 is alkaline in nature and is a chemically stable substance. . For this reason, neutralizing the acidity of the sulfuric acid pitch 2 with the baked product 4 as described above is reasonably achieved technically.

  Moreover, the fired product 4 is curable in nature. For this reason, even if the mixture 24 after mixing and neutralizing the sulfuric acid pitch 2 and the fired product 4 is disposed of by landfill, for example, unnecessary softening of the ground is prevented. Therefore, the subsequent disposal of the mixture 24 can be facilitated without causing inconveniences such as environmental degradation.

  Further, as described above, when the oil content in the mixture 24 of the sulfuric acid pitch 2 and the fired product 4 is large, the mixture 24 is fired to obtain the fired product 4, and the fired product 4 is mixed with the sulfuric acid pitch 2. I am doing so.

  For this reason, it is more reliably prevented that the oil in the neutralized mixture 24 is unnecessarily diffused in the next step such as landfill disposal. Therefore, the expansion of environmental pollution based on the sulfuric acid pitch 2 is more reliably prevented.

  Further, as described above, the neutralizing agent 6 is mixed with the mixture 24.

  For this reason, when the calcined product 4 is insufficient for the neutralization of the sulfuric acid pitch 2, the desired neutralization of the calcined product 4 is more reliably achieved by mixing the neutralizing agent 6. .

  Further, as described above, the sulfuric acid pitch treatment apparatus 1 includes the sulfuric acid pitch 2 and the baked product 4 of the waste 3 and mixes them, and the sulfuric acid pitch 2 is accommodated at the upper end thereof. A container 27 having an opening 26 is inclined so that the opening 26 is directed downward, and a charging machine 29 that allows the sulfuric acid pitch 2 in the container 27 to be charged into the mixer 16; And a solid matter crusher 40 that can crush the solid sulfuric acid pitch 2 inside.

  For this reason, the same effect as the first and second “effects” is produced.

  Even if the sulfuric acid pitch 2 accommodated in the container 27 has a solid portion, it is crushed into small pieces by the solid material crusher 40, and the discharge from the container 27 is more reliably achieved. Therefore, it is prevented that the sulfuric acid pitch 2 remains in the container 27, and the sulfuric acid pitch 2 and the fired product 4 which are made into small pieces are more sufficiently mixed, so that the neutralization treatment of the sulfuric acid pitch 2 is further performed. Certainly achieved.

  In addition, although the above is based on the example of illustration, the baked product 4 may baked only a general waste or only an industrial waste. Further, when the sulfuric acid pitch 2 is not solid, the crusher 14 is not necessary. Further, the mixer 16 may have the casing 18 and the shaft center 17 of the rotor 19 oriented sideways.

FIG. 3 is a partially enlarged detail view of FIG. 2. It is a whole simplified diagram of a sulfuric acid pitch processing device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sulfuric acid pitch processing apparatus 2 Sulfuric acid pitch 3 Waste 4 Baking goods 6 Neutralizing agent 12 Roasting furnace 14 Crusher 15 Hopper 16 Mixer 24 Mixture 25 Axis 26 Opening 27 Container 29 Loading machine 40 Solid matter crusher A Ascending B Tilt C Tilt D Forward movement E Reverse movement

Claims (4)

  A sulfuric acid pitch treatment method comprising mixing sulfuric acid pitch and a fired waste product to neutralize the acidity of the sulfuric acid pitch.   The mixture according to claim 1, wherein when the oil content in the mixture of the sulfuric acid pitch and the fired product is large, the mixture is fired to obtain a fired product, and the fired product is mixed with the sulfuric acid pitch. Of sulfuric acid pitch treatment.   The sulfuric acid pitch treatment method according to claim 1, wherein a neutralizing agent is mixed with the mixture.   A mixer that contains sulfuric acid pitch and waste baked product and mixes them, and a container that contains sulfuric acid pitch and has an opening at the upper end thereof, and the above-mentioned opening is inclined so that the opening faces downward. Sulfuric acid pitch, comprising: a charging machine capable of charging sulfuric acid pitch in a container into the mixer; and a solid material crusher capable of crushing solid sulfuric acid pitch in the inclined container. Processing equipment.

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