JP3806722B2 - How to transport chemicals - Google Patents

Description

  The present invention relates to a method for transporting chemicals, and more specifically, transports a powdered chemical used by being dissolved in a solvent from a supplier's storage warehouse to a user reception site safely and efficiently. The present invention relates to a method for transporting chemicals that are quickly dissolved in solution concentration and delivered.

  As an example of the powdery chemicals used by being dissolved by the solvent as described above, sodium chlorate (sodium chlorate) used as an oxidative bleaching agent for bleaching pulp in a paper mill can be mentioned.

  Conventionally, as a method of transporting this sodium chlorate (hereinafter referred to as “medicine”) to a manufacturer (hereinafter referred to as “user”) such as a paper mill, for example, FIG. 18 schematically shows a work procedure (flow). As described above, when a container 1 such as a bag containing a predetermined weight of the medicine M is stored in a dangerous goods storage warehouse 2 of a trader such as a transport company (hereinafter referred to as a “supplier”), and the user requests delivery In general, a supplier loads a container 1 containing a medicine M on a transport truck 3 and transports it to a user's medicine receiving place for delivery.

  The medicine M received by the user in this manner is stored in the user's dangerous goods storage warehouse 4 until it is used, and when used, the container 1 is first removed from the dangerous goods storage warehouse 4 by a dedicated melting employee. The solution that has been taken out and charged in advance in the form of powder into the dissolution tank 5 supplied with hot water from the hot water supply device 6 and stored in advance is stirred and dissolved by the stirrer 7, and the solution prepared to a predetermined concentration is fed. In general, it is sent to a storage tank 9 by a pump 8 and stored until it is subjected to bleaching.

  However, as is well known, this chemical M (sodium chlorate) is an extremely strong oxidizing substance, which becomes unstable at high temperatures, and is likely to ignite or explode when it comes into contact with combustible materials. Because it is a dangerous chemical that is easy to use, it is necessary for the user to obtain the prescribed approval for storage and handling of the chemical M when using the conventional transportation method as described above. There were restrictions on the structure, installation location, and standards set for those involved. Furthermore, in order to perform a work such as melting on the user side, it is never desirable for the user side because at least a dedicated worker is required for this purpose.

  Therefore, conventionally, as shown in FIG. 19, a chemical dissolution facility such as a dissolution tank 5, a hot water supply device 6, a stirrer 7, a liquid feed pump 8, etc. is held at the supplier side, and when the chemical M is delivered to the user, The supplier takes out a container 1 containing a predetermined amount of medicine M from the dangerous goods storage warehouse 2, prepares a chemical solution of a predetermined concentration in the chemical dissolution facility, and refills the chemical solution into the tank 13 of the tank truck 10. Generally, the transportation method for delivery to is known.

However, when the chemical M is transported by such a method, the supplier can transport the chemical solution dissolved in warm water and increased in volume by the tank lorry 10 which is limited in terms of capacity and weight. Compared with transport, the transport efficiency per unit of chemicals decreases, and when the temperature of the aqueous solution decreases during transport (for example, 10 ° C or less ), the aqueous solution becomes supersaturated and crystals are formed. There was a risk of precipitation. Accordingly, when the drug M is delivered to a cold district, the transportation time cannot be made long, and there is a problem that the range of the transportable area is limited.

  On the other hand, although there is a merit that the receiving side user does not need the equipment for storing and dissolving the medicine M and the dedicated worker for this, there is a problem that the delivery price of the medicine M becomes high. .

  Therefore, in view of the above circumstances, the present applicant first stores powdery chemicals that are dissolved in a solvent and used as powders in a tank container, and transports them to a user's chemical reception station. Japanese Patent Application No. 2004-90182 has proposed a method for transporting chemicals in which a solvent and vapor provided by the user are supplied into the tank container at the chemical receiving place of the user to stir and dissolve the chemical.

  That is, in this chemical transport method, as shown schematically in FIG. 20 in its work procedure (flow), step S1 for storing a bag body 1F containing a predetermined weight of the chemical M in the storage warehouse 2, and At the time of delivery, the bag body 1F containing the medicine M is unsealed and inserted from the supply port of the tank container 13T, and stored in the tank container 13T as powder, and the trailer 10T contains the medicine M. Step S3 for transporting the tank container 13T to the user's medicine receiving place, Step S4 for supplying the solvent and vapor into the tank container 13T and stirring and dissolving the medicine M at the user's medicine receiving place, and dissolution to a predetermined concentration Step S5 for supplying the chemical solution to the user storage tank 9 from the tank container 13T.

  According to this chemical transport method, the user does not need the equipment for storing the chemical M or the dissolution tank, and no dedicated personnel are required for this purpose. it can. On the other hand, for the supplier side, since the drug M is transported in the form of powder, the unit transport efficiency of the drug M can be greatly increased as compared with the case of transporting in the solution state. Since a series of operations up to this point can be carried out by a small number of workers, there is an advantage that the transportation cost can be greatly reduced in addition to the expansion of the deliverable area and the improvement of the transportation efficiency.

  However, although the unit transportation efficiency of the medicine M has been greatly improved, at this time, the maximum total weight of the trailer 10T defined by the Road Traffic Law (ie, the tractor 11T, the chassis 12T, the tank container 13T) And the total weight of the tank container 13T in the tank container 13T) are limited to 35 tons, so the weight of powder chemicals that can be stored and transported in the tank container 13 is at most 20 tons (15 tons in the above proposal). )

  Recently, however, regulations on trailers under the Road Traffic Law have been relaxed, and the maximum total weight has been increased from 35 tons to 44 tons. As a result, the load weight has been increased from the conventional 20 tons to 28 tons, and a large amount of medicine M can be transported at a time.

  The present invention has been made in view of the above-described circumstances. The object of the present invention is to improve the above-mentioned proposal and to supply a powdery chemical used by being dissolved in a solvent by a supplier. It is an object of the present invention to provide a method for transporting chemicals that can be transported safely and more efficiently from a storage warehouse to a user's reception, and quickly dissolved to a predetermined solution concentration before delivery.

  The above-mentioned object of the present invention is a method for transporting a powdered chemical used by being dissolved in a solvent and delivering it to a user, and storing a bag containing a predetermined weight of the chemical in a storage warehouse. Step S1 for performing the delivery to the user, step S2 for opening the bag containing the medicine, putting it into the tank container and storing it in powder form, and storing the medicine stored in the tank container with a trailer. Step S3 of transporting to the user's chemical reception site, and supplying the solvent from the solvent storage and dissolution tank disposed in the chemical reception site into the tank container, stirring and circulating the chemical to a predetermined concentration Step S4 for dissolving in the solution and Step S5 for supplying the chemical solution dissolved in Step S4 to the storage tank of the user. It is achieved by providing a method of transporting drugs to.

  The above-mentioned object of the present invention can be achieved more effectively by providing a method for transporting a medicine characterized in that the powdery medicine is sodium chlorate and the solvent is warm water. .

  The above object of the present invention can be achieved more effectively by providing a method for transporting a medicine, wherein the solvent is provided by the user.

  Further, the object of the present invention is that the solvent is discharged from the height direction position of the solvent storage and dissolution tank, supplied from the bottom of the tank container to the inside, and stirred, and then the height of the tank container is increased. This can be achieved more effectively by providing a method for transporting chemicals characterized in that it is circulated so as to be discharged from the vertical position and returned to the inside from the bottom of the solvent storage and dissolution tank.

  Further, the object of the present invention is to provide a method for transporting a medicine, wherein the solvent is diffused in a horizontal direction when returned from the bottom of the solvent storage and dissolution tank to the inside. Achieved more effectively.

  Still further, the object of the present invention is characterized in that the surface of the tank is washed with washing water after the chemical is added in step S2, and the washing water is reused in step S4. This is accomplished more effectively by providing a method for transporting the drug.

  As described above, according to the present invention, the supplier stores the chemical in powder form in the tank container and transports it to the user's receiving place, and uses the solvent provided by the user to supply the tank container on the supplier side and the user side. In this method, the powdered chemical is stirred and circulated between the solvent storage and dissolution tanks of the solvent and dissolved to prepare a chemical solution having a desired concentration and delivered to the user. It eliminates the need for powder chemical storage and inventory management (and therefore does not require approval for dangerous goods storage, etc.), and eliminates the need for dedicated personnel for storage and dissolution, greatly reducing user expenses. be able to.

  On the other hand, for the supplier side, since the chemical is transported in the form of powder, the unit transportation efficiency of the chemical can be greatly increased (more than twice as much as before) compared to the case of transporting in the solution state (result). In addition, it can contribute to the cost reduction of the user), and since a series of operations from transportation to melting can be performed by a small number of workers, it is possible to expand the delivery area and improve transportation efficiency. In addition, transportation costs can be significantly reduced.

  In particular, as described above, the maximum total weight has been increased from 35 tons to 44 tons due to recent relaxation of trailer regulations, thereby increasing the amount of powder chemicals transported from 15 tons to 28 tons at the time of the previous proposal. As a result, the transportation efficiency can be improved by about 87% compared to the conventional case.

  In addition, since powder chemicals are stirred and circulated between the tank container on the supplier side and the tank for storing and dissolving the solvent on the user side, large-capacity chemical solutions can be prepared in a short period of time. It can be greatly reduced.

  Furthermore, the chemical injection part of the tank container has a dust scattering prevention function, a dust suction function, and chemicals that adhere to or remain on the inner and outer surfaces of the tank container are washed and recovered and reused. By adopting the closed method, it is possible to prevent the chemical from flowing out to the outside, thereby providing a safer and environmentally friendly chemical transportation method.

  Hereinafter, the contents of the present invention will be described in detail based on preferred embodiments, taking the case where the chemical is sodium chlorate as an example, as described above. In addition, this invention is not necessarily limited to the following embodiment, and it cannot be overemphasized that the structure can be changed into various things in the range which does not deviate from a claim.

  FIG. 1 schematically shows an operation procedure of a chemical transportation method (hereinafter referred to as “the present transportation method”) according to an embodiment of the present invention, and is in a powder form according to the conventional transportation method described above. FIG. 2 is a flow chart showing steps until sodium chlorate (hereinafter referred to as “drug” in the same manner as described above) M is dissolved in a solution having a predetermined concentration and stored. In describing the contents of the transportation method, components common to the above-described conventional transportation method are denoted by the same reference numerals.

  As will be described later, this transportation method is a method in which a chemical M is dissolved in warm water of about 90 ° C. as a solvent, stirred and circulated to prepare a solution having a predetermined concentration of 46% and delivered to the storage tank 9 of the user. In step S1, the bag 1F storing the medicine M in a predetermined weight is stored in the storage warehouse 2, and when delivering to the user, the bag 1F storing the medicine M is opened and stored in the tank container 130. Step S2 for charging and storing the powder as it is, Step S3 for transporting the drug M stored in the tank container 130 to the drug receiving station 180 of the user by the trailer 100, and the drug receiving station 180. A step of supplying the solvent from the solvent storage and dissolution tank 150 into the tank container 130 and stirring and circulating the solvent to dissolve the chemical M in a solution of a predetermined concentration. And S4, is made to dissolved drug M solution from supplying step S5 Metropolitan storage tank 9 of the user in the step S4.

  Here, the bag 1F is a flexible and strong cloth bag defined by an international standard called a flexible container bag. The medicine M is stored in the bag 1F every predetermined weight (usually 1 ton). Delivered by a chemical manufacturer to a supplier.

  The trailer 100 used in the present embodiment is composed of a tractor 110, a chassis 120, and a tank container 130 as shown in a side view in FIG. Is within 3.8 meters and the total weight is within 44 tons.

  3A and 3B show the structure of the tank container 130. FIG. 3A is a side sectional view thereof, FIG. 3B is a plan view thereof, and FIG. 3C is a sectional view taken along line XX in FIG. The tank container 130 is an ISO standard BV-certified product formed by a cylindrical peripheral wall 131 having a total length of 6 meters, a diameter of 2.4 meters, and a weight of 4 tons. Two chemical inlets 132 for charging the chemicals (a protective lid 132c is attached to the chemical inlet 132 so as to be openable and closable), a stirring device 133 for stirring the charged chemicals M, and an exhaust duct An attachment port 134 and an ultrasonic liquid level sensor 135 are provided. Since the height of the trailer 100 is 3.8 meters or less due to the regulations of the Road Traffic Act, the agitator 133 is used for the tank until the medicine M is transported to the user's medicine reception place as described later. The container 130 is accommodated.

  A liquid feed pipe 136 is provided at a substantially central portion of the bottom wall of the tank container 130 such that one open end is connected to the bottom wall and the other open end is suspended from the bottom wall. As will be described later with reference to FIG. 13, hot water from the hot water storage / dissolution tank 150 is supplied into the tank container 130 via the liquid feeding pipe 136, and the dissolution of the medicine M starts from the bottom side of the tank container 130. Is done. The liquid feed pipe 136 is used as a supply pipe to the hot water storage / dissolution tank 150 of the aqueous solution after the completion of dissolution, and is used for cleaning the inside of the tank container 130 after the chemical dissolution treatment work is completed. It is also used as a drain pipe for discharging washing water.

  Further, as shown in FIG. 3B, two liquid supply pipes 137 are juxtaposed in the horizontal direction at a substantially central portion of the tank container 130 on the bottom wall side. Note that the number of the liquid supply pipes 137 can be increased or decreased as necessary. As shown in FIG. 3 (B), a connecting pipe 137a is connected to the central portion of the liquid feeding pipe 137 in the horizontal direction, and below the connecting pipe 137a, as shown in FIG. 3 (A), A liquid feed pipe 138 having one open end connected to the connecting pipe 137 a and the other open end protruding downward from the bottom wall of the tank container 130 is provided. As will be described later with reference to FIG. 15, the chemical solution from the hot water storage and dissolution tank 150 is supplied into the tank container 130 via the liquid supply pipe 138 and discharged from both ends of the opening of the liquid supply pipe 137. Circulation and stirring are performed.

Furthermore, a liquid feed pipe 139 is provided in the vertical direction at a substantially central portion of the bottom wall of the tank container 130. One opening end of the liquid feeding pipe 139 is disposed at a position in the height direction ( about 1/3 of the total height) of the tank container 130, and the other opening end is similar to the liquid feeding pipe 138 in the tank container 130. It protrudes downward from the bottom wall of the. As will be described later with reference to FIG. 15, the chemical solution in the tank container 130 is discharged through the liquid supply pipe 139 and sent from the bottom of the hot water storage and dissolution tank 150 to circulate the chemical solution. .

  As shown in a perspective view in FIG. 4, a recovery groove 140 for recovering cleaning water is provided on the outer surface of the peripheral wall 131 of the tank container 130 so as to surround the peripheral wall 131, and the recovery groove 140 is formed in the tank container 130. Is connected to the recovery groove 140a at the side end. As will be described later, the tank container 130 is washed with washing water as indicated by an arrow Y1, and the washing water used for washing flows through the collection groove 140 as indicated by arrow Y2, and flows through the collection groove 140a as indicated by arrow Y3. It is collected in a predetermined collection container (not shown) and reused. In addition, the normal washing | cleaning liquid which does not contain the chemical | medical agent M is thrown away into a sewer as it is.

  An exhaust duct 134d is attached to the duct attachment port 134, and a dust suction filter 134f and an exhaust blower 134b are connected to the exhaust duct 134d to form an exhaust system. Through this exhaust system, the dust of the medicine M generated when the bag 1F is put into the tank container 130 is not released into the outside air. In the present embodiment, this exhaust system is provided in the trailer 100, and a private generator (not shown) mounted on the chassis 120 (a motor power supply for driving the exhaust blower 134b and a motor power supply for driving the stirring device 133). However, the exhaust system may be operated on the user side.

  As described above, the tank container 130 is equipped with the means for stirring and dissolving the drug M, and has a feature in that it has both functions of transporting and dissolving the drug M.

  Next, the trailer 100 configured as described above provides a method for each step in which the medicine M is transported to the user, adjusted to a desired concentration of the chemical solution, and then stored in the user's tank 9. This will be explained in sequence with the equipment that is being used.

  In step S1, the medicine M delivered from the medicine manufacturer is stored in the dangerous goods storage warehouse 2 of the supplier. As described above, the medicine M is usually delivered by the medicine manufacturer in the form of a 1 ton unit in the form of a powder in the form of a powder, and the delivered medicine M is subject to a predetermined safety management standard by the supplier. Stored.

  In step S <b> 2, the medicine M stored in the bag body 1 </ b> F is refilled in the tank container 130. At the time of this refilling, the tank lorry 100 is put back into the refilling room of the dangerous goods storage warehouse 2 along the white line guide line by the driver, and is stopped at a predetermined position by a car stop. In addition, it is desirable that this driver has a handling qualification based on the Dangerous Goods Control Law and the Poisonous and Deleterious Substances Control Law.

  In the refilling station, dust, dust, mud, and the like adhering to the surface of the tank container 130 while the trailer 100 is traveling as a pre-operation is washed as described above, and the washed water washed off passes through the collecting grooves 140 and 140a. Discarded into the sewer.

  Thereafter, the exhaust duct 134d is attached to the duct attachment port 134, and an external exhaust blower 134b is operated by turning on a duct operation switch (not shown), and the inside of the tank container 130 is placed in a negative pressure state. As a result, the chemical M scattered at the time of charging does not flow backward from the charging port 132 and is released to the outside, and the air containing the chemical M in the tank container 130 is filtered by the dust filter 134f, and only clean air is obtained. Is released to the outside.

  Next, a protective lid 132c that can be opened and closed at each input port 132 is opened by the operator, and a predetermined quantity (28 in this embodiment) in which the medicine M is stored by the hoist device 160 from the two input ports 132 that are opened. ) Bag body 1F.

  FIG. 5 is a plan view showing a state in which the bag body 1F is charged into the charging port 132 of the tank container 130 by the hoist device 160, and FIG. 6 is a side view thereof. The hoist device 160 is composed of a hoist 162 slidably provided along a hoist rail 161 laid on the ceiling of the refill chamber. A measuring device 164 is connected to the hoist 162 via a wire 163, and then a weight detection type automatic dropping mechanism 165 and a coupling mechanism 166 for attaching and detaching the bag body 1F are connected. The hoist device 160 is provided so as to move in the direction indicated by the arrow in FIGS. 5 and 6.

  Prior to the insertion of the bag 1F containing the medicine M, the hoist device 160 is moved as indicated by the arrow (1) in FIG. 5, and the funnel shape is formed at the positions of the two inlets 132 opened (positions a and b). A hopper 167 is attached. Thereafter, the hoist device 160 is moved as indicated by arrows (2), (2-1), (2-2), and (2-3), and a predetermined number of bag bodies 1F are similarly gripped one by one. It is conveyed to the position of the hopper 167 (a position, b position). The distance from the starting point of the hoist device 160 to the automatic stop position (the position in the X-axis direction and the Y-axis direction indicated by each arrow) is stored in a memory of a control device (not shown). Thereby, even if a slight shift occurs in the stop position of the trailer 100, the bag body 1F containing the medicine M can always be accurately conveyed to the charging port 132. As a result, it is possible for a person who does not have skill to carry out the operation of putting chemicals, and it is possible to improve the accuracy of the operation and shorten the operation time.

  When the bag 1 </ b> F is conveyed to the position of the hopper 167 (position a, position b) by the hoist device 160, the wire 163 descends as indicated by the arrow (3) and enters the hopper 167. Thereafter, the bag 1 </ b> F is opened by a blade as will be described later, and stored in the tank container 130.

  FIG. 7 shows the structure of the coupling mechanism 166 and its operating method. The coupling mechanism 166 includes a concave coupling 166a that can be opened and closed and a convex coupling 166b that is placed on the top of the bag body 1F, and the wire is opened with the concave coupling 166a open as shown in FIG. 163 is lowered to the position of the convex coupling 166b, and when engaged with the convex coupling 166b as shown in FIG. 7B, the concave coupling 166a is closed and the bag body 1F is pulled upward. The empty bag 1F after the internal chemical M is stored in the tank container 130 is conveyed as indicated by the arrow (4) in FIG.

  FIG. 8 is a front view of the weight detection type automatic dropping mechanism 165. The automatic shake-off mechanism 165 measures the weight of the bag 1F after the medicine M has been added by the measuring instrument 164, and when detecting that the inside of the bag 1F is empty, the eccentric cam 165c is based on this signal. Is configured to operate for a certain period of time. When the eccentric cam 165c is rotated, the wire 163 is raised, and when the eccentric cam 165c is rotated, the operating shaft is detached from the uppermost portion of the eccentric cam 165c, the wire 163 is dropped, and the bag body 1F is vibrated in the vertical direction. Due to this vibration, the powdered medicine M adhering to the inside of the bag body 1F is cleaned off cleanly. In addition, in order to further remove residual chemicals, compressed air is blown from the lower surface opening of the bag body.

  FIG. 9 is a sectional view showing a state where the bag 1 </ b> F containing the medicine M is lowered into the hopper 167 by the hoist device 160. By the hoist device 160, 28 bags 1F (about 28 tons in weight) of chemicals M are alternately lowered into the tank container 130 from the inlets 132 of the two hoppers 167.

  The hopper 167 is stably fixed to the upper portion of the tank container 130 by the four fixing legs 167k, and the gap with the charging port 132 is shielded by the rubber packing 167g so that the chemical M is not scattered. When the bag body 1F is lowered into the hopper 167, the hopper lid closing interlock lever 167m hits the bottom of the bag body 1F, and the shielding cover 167c opened as indicated by the dotted line by the weight of the bag body 1F is automatically closed. As a result, the medicine M is prevented from scattering as described above. A lid weight balancer 167b made of a spring is provided above the hopper lid closing interlock lever 167m, so that the shielding lid 167c is normally opened after the empty bag body 1F is lifted from the hopper 167. Has been.

  A cutting blade 167t for opening the bag body 1F is provided at the lower portion of the hopper 167. The incision blade 167t is a stainless steel blade body having a triangular shape as shown in the figure, and a sharp blade edge is formed at the top. For this reason, when the bag body 1F is further lowered by the hoist device 160, the lower portion of the bag body 1F hits the top of the cutting blade 167t, and the bag body 1F is cut by a sharp blade edge. When the bag 1F is opened in this way, the powdery medicine M stored inside is dispersed in the longitudinal direction in the tank container 130 via the medicine diffusion plate 167p attached below the hopper 167. 6 is stored in the bottom of the tank container 130 as indicated by a dotted line in FIG.

  When the introduction of the medicine M is completed, the weight detection type automatic shake-off mechanism 165 is automatically operated, and the residual medicine M in the bag body 1F is shaken off. When the automatic shake-off mechanism 165 stops, compressed air is introduced into the empty bag body (1F) indicated by the dotted line in FIG. 9 from the tip of the air nozzle 167a provided at the lower portion of the cutting blade 167t. M is completely removed.

Thus, the medicine M inside is taken out and the empty bag body 1 </ b> F is lifted by the hoist device 160. The shield lid 167c closed at this time is automatically lifted up by the convex coupling 166b attached to the upper portion of the bag body 1F.
Thereafter, as described above, the empty bag body 1 </ b> F is conveyed along the path indicated by the arrow (4) in FIGS. 5 and 6 by the hoist device 160 and is collected in the collection box 170. At this time, the convex coupling 166b is removed from the bag 1F and is reused. The bag 1F that has been cut open and cannot be used is treated as industrial waste.

  The above operation is repeated until the loading and storage of the entire amount of the medicine M is completed, and when it is finished, all the facilities and preparations for transport, washing, prevention of scattering, etc. performed in preparation for the feeding of the medicine M are initial. It is returned to the state. After this operation is completed, the surface of the tank container 130 is washed with washing water by the washing means shown in FIG. 4, and the water used for washing is collected. Since the cleaning water collected in this way contains some chemical M, it is packed in a transport tank via a filtration device (not shown), transported to the user by the trailer 100, and in step 4 to be described later. When chemical M is dissolved, it is reused as an aqueous solution. Thus, the operation in step S2 is completed.

  As described above, in the method of transporting the chemical M, many measures are taken to prevent the chemical M from being scattered from when the chemical M is charged to when it is stored. Has been made.

  In step S3, about 28 tons of chemicals M stored in the tank container 130 as described above are transported by the trailer 100 to the user receiving place 180. According to the present transportation method, the medicine M can be transported in a large amount at the same time in the powder state as described above, so that there is an advantage that transportation efficiency is extremely good. In addition, since the medicine M is not affected by the temperature, it can be transported to a remote cold area with a sense of security. As described above, when the drug M is transported by the trailer 100, it is desirable from the viewpoint of work efficiency and cost that a person having a qualification for handling dangerous chemicals drives or rides.

  In step S4, the chemical M transported to the user receiving place 180 by the trailer 100 is agitated and circulated between the tank container 130 on the supplier side and the hot water storage and dissolution tank 150 on the user side to obtain a predetermined concentration. In an aqueous solution.

As preparation for dissolution of the medicine M, as shown in FIG. 10, after the trailer 100 is stopped at a predetermined position of the medicine receiving place 180, in order to withstand the total weight and absorb the vibration of the tank container 130 generated at the time of dissolution. Then, the four auxiliary pillars 121 for protecting the axles mounted on the chassis 120 of the trailer 100 are lowered to the ground and fixed. A hot water storage / dissolution tank 150 and a storage tank 9 for storing a chemical aqueous solution are provided in the chemical receiving place 180 or in the vicinity thereof. In this hot water storage / dissolution tank 150, 32 tons (32 m ³ ) of 90 ° C. hot water is stored in advance by the user.

  Next, the exhaust duct 134d connected to the dust suction filter 134f and the external exhaust blower 134b is attached and fixed to the duct attachment port 134 as described above in order to discharge the vapor generated during melting to the outside.

  Thereafter, the power supply of the private generator described above is turned on to drive the private generator motor, and the stirrer 133k of the stirring device 133 stored in the tank container 130 is changed from FIG. 11 (A) to FIG. 11 (B). ) As shown. As shown in the drawing, a groove 133g is formed on the outer periphery of the main body of the agitator 133k in the direction opposite to the rotation direction of the rotating shaft 133s that supports the propeller (rotating blade) 133p. The main body of the tank container 130 is provided in the groove 133g. The pin applied to is fitted. In the initial state where the medicine M is not completely dissolved, the reaction torque of the propeller 133p is strong, the agitator 133k main body rotates in the reverse direction, the agitator 133k is raised by the groove 133g, and is locked at the top. As the agitator 133k rises, the rotation shaft 133s also rises, and is free from rotation from the agitator shaft protection device 133y provided on the bottom surface of the tank container 130. In this embodiment, the tank container 130 is provided with the stirring device 133. However, this equipment may be provided on the user side, and in this way, the structure of the tank lorry 100 is simplified. Can do.

  Next, piping connection between the tank container 130 and the hot water storage and dissolution tank 150 is performed. FIG. 12 is a cross-sectional view of the piping system on the tank container 130 side and the hot water storage and dissolution tank 150 side. As shown in the drawing, liquid supply pipes 151 and 152 are provided on the bottom wall of the hot water storage / dissolution tank 150, and a liquid supply pipe 153 is provided on the side wall so as to protrude outward. The liquid feeding pipe 152 and the liquid feeding pipe 153 are combined in the middle to form a liquid feeding pipe 154, and the two liquid feeding pipes 155 and 156 are branched and connected from the middle of the liquid feeding pipe 154, and the liquid feeding pipe 154 is connected. Is connected to the storage tank 9. In the middle of the liquid supply pipe 151, the liquid supply pump Pb and the valve Bf are similarly provided. Similarly, the liquid supply pipe 152 has the valve Ba, the liquid supply pipe 153 has the valve Bd, and the liquid supply pipe 154 has the liquid supply. The pump Pa and the valve Be are provided, the liquid supply pipe 155 is provided with a valve Bc, and the liquid supply pipe 156 is provided with a valve Bb. In addition, a disc-shaped baffle plate 157 for diffusing the solution is provided slightly above the opening end of the liquid feeding pipe 151 connected to the bottom wall of the hot water storage and dissolution tank 150, as will be described later. ing. These piping facilities are all equipped on the user side.

  In the piping system equipped as described above, the piping connection between the tank container 130 and the hot water storage / dissolution tank 150 is connected to the open ends of the liquid supply pipes 151, 155, 156 on the hot water storage / dissolution tank 150 side. , By connecting the open ends of the liquid supply pipes 139, 138, 136 on the tank container 130 side with couplings 139c, 138c, 136c, respectively. The preparatory work for chemical dissolution is thus completed. Note that each of the above-described preparation operations has no particular priority, and can be performed simultaneously if there is a manpower, sequentially from what can be performed according to the situation.

  When the above preparatory work is completed, the hot water in the hot water storage and dissolution tank 150 is sent to the inside of the tank container 130 and the dissolution of the medicine M is started.

  In this liquid supply, the valves Ba and Bb are opened to operate the liquid supply pump Pa (the other valves are closed and the liquid supply pump is not operated). As shown by the arrows in FIG. This is performed by sending 13 tons of hot water of 32 tons of hot water in the tank 150 to the inside of the tank container 130 from the liquid supply pipe 136 via the liquid supply pipes 152, 154 and 156. At this time, the amount of hot water supplied into the tank container 130 is detected by an ultrasonic liquid level sensor 135 provided in the tank container 130 and controlled by a control device (not shown). It should be noted that a flow meter can be used in place of such a liquid level sensor 135. As shown in the figure, this hot water is supplied in a divergent shape upward from the center of the bottom wall of the tank container 130. Accordingly, the powder chemical M in the tank container 130 is mortar-shaped from the bottom wall side. It will be dissolved.

  Next, the liquid feed pump Pa is stopped, and the valves Ba and Bb are closed. FIG. 14 shows the state at this time. At this time, all valves in the piping system are closed, and the liquid feed pump is stopped. On the other hand, in the tank container 130, the stirring device 133 receives the stirring action, and the undissolved chemical M is dissolved to the maximum (maximum concentration 50.2%) by 13 tons of hot water.

Next, the valves Bc, Bd, and Bf are opened, the liquid feed pumps Pa and Pb are operated, and the chemical solution is transferred between the tank container 130 and the hot water storage and dissolution tank 150 as shown by arrows in FIG. Perform circulating stirring. At this time, as described above, since the end opening of the liquid feeding pipe 139, that is, the suction port is arranged at a position about 1/3 of the height of the tank container 130, the undissolved portion remaining on the bottom wall side. The powder medicine M is not sucked into the liquid feeding pipe 139 by the liquid feeding pump Pb, and only the high concentration aqueous solution is sucked. The high-concentration aqueous solution is supplied to the inside from the bottom wall of the hot water storage / dissolution tank 150 via the liquid feeding pipes 139 and 151. Thereafter, the high-concentration aqueous solution is diffused in the horizontal direction of the bottom wall by the baffle plate 157 disposed at the upper part of the discharge port. Due to this diffusion action, the upper hot water and the lower high-concentration aqueous solution are separated, and only the upper hot water is pushed up by the lower high-concentration aqueous solution and sent out from the supply pipe 153. At this time, the flow rates of the liquid feed pumps Pa and Pb are detected by the liquid level sensor 135 so that the liquid level in the tank container 130 is constant, and are controlled by a control device (not shown).

  At this time, the high-concentration aqueous solution in the hot water storage / dissolution tank 150 has a specific gravity of about 1.4 and is much heavier than the hot water, and the temperature of the hot water is 90 ° C. 15 is about 30 to 40 ° C., as shown in FIG. 15, the two are not completely mixed, and the state where the high concentration aqueous solution is located on the lower side and the hot water is located on the upper side is continued. Also, as shown in the figure, one open end of the liquid supply pipe 153, that is, the hot water suction port is set at a position slightly below the liquid level of 19 tons of hot water, so that only the hot water on the upper side is fed. It is supplied into the tank container 130 through the liquid pipes 153, 154, 155, 138, and 137, whereby the undissolved powder chemical M remaining on the bottom wall side is efficiently dissolved. By repeating this dissolution operation, circulation stirring is performed, and finally, all the chemicals M in the tank container 130 are dissolved, and the solution in the tank container 130 and the hot water storage / dissolution tank 150 has a substantially uniform concentration. Adjusted to

When the liquid level sensor 135 (or a concentration meter or a timer) detects that the chemical M has been dissolved in a predetermined concentration solution, the operator stops the liquid feed pumps Pa and Pb, and the valves Bc, Bd, and Bf. On the other hand, the valves Ba and Bb are opened, and the liquid feeding pump Pa is reversed. As a result, as shown by arrows in FIG. 16, the entire solution in the tank container 130 is delivered into the hot water storage and dissolution tank 150. The aqueous solution concentration at this point is 46.6%, which is a little higher than the desired product concentration of 46%. Therefore, 0.87 tons of hot water is further stored in the hot water storage and dissolution tank 150. Then, the final concentration is finely adjusted by operating the stirring device 158 equipped in the warm water storage and dissolution tank 150.
The recovered aqueous solution is reused in a part of the added 0.87 ton of warm water. Thus, as shown in FIG. 17, a 60.8 ton 46% aqueous solution is prepared in the hot water storage and dissolution tank 150.

  In step 5, the aqueous solution prepared as described above is supplied to the storage tank 9. During liquid feeding, the valves Bb, Bc, Bd, and Bf are closed, while the valves Ba and Be are opened and the liquid feeding pump Pa is operated in the forward direction. As shown by arrows in FIG. The entire aqueous solution is fed into the storage tank 9. The aqueous solution of the medicine M stored in the storage tank 9 is used for pulp bleaching.

  Thereafter, all the drive systems are stopped, all the valves are closed, the couplings 136c, 138c, and 139c are removed, and the piping system of the tank container 130 and the hot water storage and dissolution tank 150 is separated. At this time, the aqueous solution leaking from the coupling part is collected in a washing water / leakage liquid collecting pan, collected, and reused at the next dissolution. Prior to stopping the drive system, the stirring device 133 is accommodated in the tank container 130 by reverse rotation. Thereafter, the axle protection column 121 is accommodated, and all of the above-described preparation operations are returned to the initial state, and all the operations are completed.

  As described in detail above, the present invention performs agitation and circulation of powdered chemicals between the tank container on the supplier side and the solvent storage and dissolution tank on the user side, so that a large-capacity chemical solution can be prepared in a short time. This can greatly reduce costs.

  It is desirable to equip a water vapor supply system so as to supply water vapor into the tank container in preparation for the temperature drop of the hot water when the powder chemical is dissolved.

  As mentioned above, the content of the present invention has been explained by taking the case where the powdered chemical is sodium chlorate as an example. However, the present invention is not necessarily limited to the transportation of such a chemical and is used by being dissolved in a solvent. It is effective for transporting powdered chemicals that are required to be handled safely during storage, transportation, dissolution, and liquid feeding.

It is a flowchart which shows the outline | summary of the chemical | medical agent transport method concerning one Embodiment of this invention. It is a side view of the trailer used for transportation of the above-mentioned medicine. It is a figure which shows the internal structure of the tank container in the said trailer, (A) is a sectional side view, (B) is a top view, (C) is XX sectional drawing of (A). It is a perspective view which shows the external appearance of the said tank container. It is a top view which shows the method of throwing in and storing a chemical | medical agent in a tank container with a hoist apparatus. FIG. 6 is a side view of FIG. 5. It is a front view of the coupling mechanism which attaches and detaches a medicine storage bag body, (A) shows before mounting and (B) shows at the time of mounting. It is a front view of a weight detection type automatic shaking mechanism. It is sectional drawing which shows the state by which a chemical | medical agent storage bag body is opened. It is a side view of the tank container in a chemical receiving place (chemical dissolving room). It is sectional drawing which shows the structure of a stirring apparatus, (A) is a figure which shows a mode that the stirrer is incorporated, (B) shows a mode that it rose. It is a sectional side view which shows the piping system of a tank container and the tank for solvent storage and dissolution. It is sectional drawing which shows a mode that warm water is sent to a tank container from the tank for solvent storage and dissolution. It is sectional drawing which shows a mode that a chemical | medical agent is melt | dissolved in a tank container. It is sectional drawing which shows a mode that a chemical solution is circulated and stirred between a tank container and a tank for solvent storage and dissolution. It is sectional drawing which shows a mode that the melt | dissolved chemical solution is collect | recovered by the tank for solvent storage and dissolution. It is sectional drawing which shows a mode that the chemical | medical solution prepared to the predetermined density | concentration is sent to a storage tank. It is a flowchart which shows the transportation method of the conventional chemical | medical agent. It is a flow figure showing other conventional medicine transportation methods. It is a flow figure showing other conventional medicine transportation methods.

Explanation of symbols

1 Chemical container 1F Bag 2 Dangerous chemical storage warehouse 3 13T, 130 Tank container 131 Perimeter wall 132 Input port 133 Stirrer 134 Duct attachment port 135 Liquid level sensors 136 to 139 Liquid feed pipe 140 Recovery groove 150 Solvent storage and dissolution tanks 151 to 156 Liquid feed pipe 157 Baffle plate 160 Hoist device 180 Chemical reception

Claims (6)

A method for transporting a powdered medicine used by being dissolved in a solvent and delivering it to a user, wherein the user stores a bag containing a predetermined weight of the medicine in a storage warehouse, and the user When delivering the product to the user, step S2 of opening the bag containing the medicine, putting it in the tank container and storing it in powder form, and storing the medicine stored in the tank container to the user's medicine receiving place by trailer Step S3 for transporting, Step S4 for supplying the solvent into the tank container from the tank for storing and dissolving the solvent disposed in the medicine receiving place, stirring and circulating to dissolve the medicine in a solution of a predetermined concentration And a step S5 for supplying the chemical solution dissolved in the step S4 to the storage tank of the user. The method for transporting medicine according to claim 1, wherein the powdery medicine is sodium chlorate, and the solvent is warm water. The method for transporting a medicine according to claim 1 or 2, wherein the solvent is provided by the user. The solvent is discharged from the height direction position of the solvent storage and dissolution tank, supplied to the inside from the bottom of the tank container, stirred, and then discharged from the height direction position of the tank container. The method for transporting medicine according to any one of claims 1 to 3, wherein the medicine is circulated so as to be returned to the inside from the bottom of the storage and dissolution tank. 5. The method for transporting a medicine according to claim 4, wherein the solvent is diffused in a horizontal direction when the solvent is returned from the bottom of the solvent storage and dissolution tank to the inside. 6. The solvent according to claim 1, wherein the surface of the tank is washed with washing water after the chemical is added in step S2, and the washing water is reused in step S4. The method for transporting chemicals described in 1.

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