JP3853597B2 - Transportation method by powder truck - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transportation method using a granular material transport vehicle or the like. That is, the present invention relates to a method for transporting cement, wheat flour, chemical products, and other powder particles in a loosely spread state in a powder vehicle or container tank.
[0002]
[Prior art]
《Technical background》
The powder carrier transports cement, wheat flour, chemical products, and other powder particles in the tank in a scattered state from the loading equipment, transports them, and unloads them to the unloading equipment.
When transported by such a granular material transport vehicle (including parking storage), water droplets are generated in the tank, and the granular material adheres to the tank, causing mold and the like. Depending on the body, it may cause solidification.
In other words, after loading the granular material into the tank of the granular material transport vehicle with the loading facility, the outside air temperature is kept during parking storage (especially at night) and transportation to the unloading facility (especially in winter). If it falls, it will become easy to generate | occur | produce a water droplet in a tank. As the temperature decreases, the saturated vapor pressure value in the tank decreases, and the humidity in the tank increases due to moisture contained in the air in the tank and moisture generated from the powder particles. More than 100%, water droplets are likely to be generated by condensation.
In particular, water droplets are prominent in the vicinity of the tank wall in contact with the outside air, and the loaded powder particles adhere to the tank wall to cause mold and the like, and depending on the powder particles, granulated sugar Solidified as shown in FIG.
[0003]
《About conventional technology》
Therefore, conventionally, a fan has been attached to the tank of the granular material transport vehicle, and air has been circulated in the outside air and the tank.
In other words, the fan is turned on during transportation until unloading, such as parking storage and transportation after loading the granular material, so that air from outside air is sent into the tank, and the humidity in the tank rises and tends to condense. The air that has become is sent out to the outside air through an attached open exhaust valve or the like.
In this way, by circulating air, the generation of water droplets in the tank can be prevented, so that the loaded granular material adheres to the tank wall, generates mold, solidifies, etc. Was also done.
[0004]
[Problems to be solved by the invention]
About the problem
By the way, in such a conventional example, the following problems have been pointed out. First, there was a problem that the prevention of water droplet generation in the tank was not reliable.
In particular, by turning the fan, the moisture in the outside air is sent into the tank as it is, and even when the weather is raining, the water droplets are still generated, and the loaded particles It has been pointed out that the tank adheres to the tank wall, generates mold, solidifies, etc.
Secondly, it was necessary to keep the fan running, which was troublesome and had problems in terms of cost and security.
In other words, the moisture in the outside air is sent into the tank, so that such moisture must be sent out to the outside air again during parking storage (for example, at night) or transportation after loading the granular material. It was pointed out that it was necessary to keep the fan running all the way until it was unloaded during transportation.
[0005]
<< About the present invention >>
In view of such circumstances, the present invention has been made to solve the above-described problems of the conventional example, in which high-pressure air that has been cooled by a cylinder and cooled to about room temperature is loaded before or during transportation. , released toward the tank at atmospheric pressure, with, fulfills the tank with dry air, the air that damp in the tank, it has to send out to the outside air, characterized by.
[0006]
[Means for Solving the Problems]
<About Claim>
The technical means of the present invention for solving such a problem is as follows. That is, the transport method using a granular material transport vehicle or the like relates to a method of transporting cement, wheat flour, chemical products, and other powders and particles with a powder transport vehicle or a container tank.
Then, after pre-pressurizing the cylinder with high-pressure air with a compressor, it is cooled to about room temperature, and the condensed water is accumulated in the lower part of the prepared cylinder, so that moisture is removed as the water. Store the high pressure air in the cylinder.
The first, after switching the exhaust valve is attached to the tank to open, directed into the tank at atmospheric pressure before loading the powder granules, releasing high pressure air of the cylinder, with, the tank with satisfying at emitted by expanded dry air to the inner, air that damp in the tank, since the left and feed to the outside air from the opening of the exhaust valves, switches the exhaust valves closed.
Then, the granular material is loaded into the tank in a bulky state from the manhole attached on the tank.
[0007]
Then, after the subsequent loading, during transportation such as parking storage, transportation , etc., the high-pressure air of the cylinder is directed toward the tank under atmospheric pressure where the powder is loaded and the exhaust valve is switched to open. releasing, with, along with filled with expanded dry air is discharged to the tank, moisture generated from moisture and powder or granular material which has flowed into the tank at the time of loading, the air tinged other moisture, open After the exhaust valve is sent to the outside air, the exhaust valve is switched to the closed state.
Therefore, when the outside air temperature decreases before unloading, the generation of water droplets due to condensation in the tank is prevented .
[0008]
<About action>
Since the transportation method by the granular material transport vehicle etc. which concerns on this invention is like this, it becomes as follows.
The loading equipment is equipped with a compressor, and high-pressure air is pressured in each prepared cylinder. The pressure of the high-pressure air is increased to increase the saturated vapor pressure value and a large amount of moisture. That is, it contains water vapor.
Then, the high-pressure air in each cylinder is cooled to room temperature by using outside air, the saturated vapor pressure value decreases, and a lot of moisture, that is, water vapor that condenses, condenses to form water and is formed in the lower part of each cylinder. Accumulate. In this way, the high-pressure air in each cylinder is stored in a state where much moisture is removed as water.
And before loading the granular material, high-pressure air in the cylinder is released into the tank under the atmospheric pressure of the granular material transport vehicle or container, and the inside of the tank is discharged and expanded with dry air Filled and humid air is sent out to the outside air.
[0009]
The powder is then loaded in bulk from the manhole into the tank, and the powder truck and container tank loaded with powder are parked in the parking lot as necessary. After being stored, it is transported and unloaded.
Then, immediately after loading, during parking storage or during transportation, high-pressure air in the cylinder is released toward the tank under atmospheric pressure in which the powder particles are loaded. Therefore, the inside of the tank is filled with the dried and expanded dry air, and the moisture that has flowed in during loading, the moisture generated from the granular material, and other humid air is sent out to the outside air.
In this way, the tank is filled with dry air during transportation, and when the outside air temperature decreases and the saturated vapor pressure value decreases, the generation of water droplets due to condensation is prevented. Moreover, this is easily and easily realized by cooling and discharging the high-pressure air in the cylinder.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
《About drawing》
Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the drawings. FIG. 1 is an explanatory front view for explaining an embodiment of the present invention. (1) FIG. 1 shows a step of storing high-pressure air from a compressor to a cylinder. (2) FIG. 1 shows a prepared cylinder. The (3) figure shows the step which discharge | releases high pressure air to the tank before the loading of a granular material, (4) The figure shows the step which discharge | releases high pressure air to the tank in which the granular material was loaded. Indicates.
FIG. 2 is used to explain the granular material transport vehicle. (1) FIG. 2 shows steps for loading the granular material, (2) FIG. 2 shows steps during transportation, and (3) FIG. Indicates the steps inside.
[0011]
<< About the powder carrier 1 etc. >>
First, the granular material transport vehicle 1 and the like will be outlined with reference to FIG. The granular material transport vehicle 1 is also referred to as a bulk vehicle. One type of granular material A selected from cement, wheat flour, and the like is separated into a tank 3 mounted on a vehicle body such as a chassis 2 as a load. It is loaded and transported in a scattered state.
As the granular material A loaded in the tank 3, in addition to the above, carbon, sand, rice, other grains, granulated sugar, other foods, chemicals, chemicals, etc. can be considered.
The tank 3 is made of a single tank type made of stainless steel or other metal, has a substantially cylindrical shape with the front and rear closed, the bottom surface is inclined downward from the front and rear to the center, and the top surface is linear in the front and rear direction. ing. On the top surface of the tank 3, a manhole 4 for loading the powder A is provided, and the manhole 4 includes a circular opening and a lid. In the figure, 5 is a wheel of the granular material transport vehicle 1, and 6 is a cab.
[0012]
And the granular material transport vehicle 1 loads the granular material A in the tank 3 in a scattered state from the loading equipment 7, transports it, and unloads it to the unloading equipment 8. After loading at the loading facility 7, the parking lot is often parked for a long time (for example, overnight). The granular material A is thus transported by the granular material transport vehicle 1.
As shown in FIG. 2 (1), the loading equipment 7 includes a silo 9 standing on the ground and storing the powder A, and a discharge port with a discharge valve 10 below the silo 9. 11 is attached. A space where the granular material transport vehicle 1 can stop is formed under the discharge port 11, and in the granular material transport vehicle 1, the manhole 4 on the tank 3 faces the discharge port 11 below the silo 9. It is stopped as much as possible.
And under the discharge port 11, the upper end of the flexible canvas conduit | pipe 12 is connected, and the lower end of the canvas conduit | pipe 12 is connected to the opening part of the manhole 4 on the tank 3 of the granular material transport vehicle 1 which stopped. Thus, the powder A is loaded.
[0013]
The unloading facility 8 includes a silo 13 standing on the ground and storing the powder A as shown in FIG. 2 (3).
In addition, an air introduction pipe (not shown) is connected to the tank 3 of the granular material transport vehicle 1, and when unloading, pressurized air is supplied to the tank 3 from an in-vehicle compressor or the like via the air introduction pipe. Blow in. Accordingly, the inside of the tank 3 is pressurized, and the loaded granular material A is mixed, aerated, and fluidized, and flows down along the bottom surface inclined downward.
And the silo 13 of the unloading equipment 8 is passed through the external receiving pipe 15 from the discharge pipe 14 opened in the center of the lower part in the tank 3 using the pressure difference inside and outside the flowing granular material A. Unload to.
The granular material transport vehicle 1 and the like are roughly like this.
[0014]
<< About the present invention >>
Hereinafter, the present invention will be described with reference to FIG. This transportation method relates to a method for transporting the granular material A in such a granular material transport vehicle 1 or a tank 3 of a container.
The high pressure air B is accumulated in the cylinder 16 in advance and cooled to room temperature, and the high pressure air B in the cylinder 16 is discharged into the tank 3 under atmospheric pressure during transportation.
These will be described in the order of (1) preparation step, (2) release step before loading, (3) loading of powder A, transportation step, etc., (4) discharge step after loading.
[0015]
<< (1) Preparation Steps >>
First, as shown in FIGS. 1A and 1B, in the preparation step (1), the high pressure air B is accumulated in the cylinder 16 by the compressor 17 in advance, and then cooled to about room temperature. The condensed water C is kept in the lower part of the prepared cylinder 16.
That is, the loading equipment 7 is provided with a compressor 17, and the high-pressure air B is subjected to animal pressure on each prepared cylinder 16 using the compressor 17. The high-pressure air B pressured in each cylinder 16 in this way is heated to a high saturated vapor pressure value and contains a large amount of moisture, that is, water vapor.
Then, each cylinder 16 is cooled using the outside air D, and the high-pressure air B that has been pressurized is cooled to about normal temperature and the saturated vapor pressure value decreases, and a lot of moisture, that is, water vapor contained therein is condensed. As a result, water C is accumulated in the lower part of each cylinder 16.
In this way, the high-pressure air B from which much moisture is removed as water C is stored and stored in each prepared cylinder 16.
[0016]
Such (1) preparation step will be described in further detail. As shown in FIG. 1 (1), the compressor 17 installed in the loading facility 7 is a high pressure air B of about 14.7 MPa to 29.4 MPa (150 kgf / cm ^{2 to} 300 kgf / cm ² ), for example 29 The high pressure air B of 4 MPa (300 kgf / cm ² ) is accumulated in each cylinder 16. AC200V is used as a power source.
For example, a plurality of cylinders 16 having a capacity of 47 L are prepared and are provided with casters. The cylinder 16 is normally stored and used in the loading facility 7, but the one having a capacity of about 4 L, which is excellent in portability, is used for mounting on the granular material transport vehicle 1, that is, for discharging during transportation. It is also possible.
The cylinder 16 is provided with a pressure reducing valve 18, a safety valve 19, a filter 20, a connection hose 21 with a connector, and the like. Instead of the pressure reducing valve 18, a throttle valve or an orifice can be used.
[0017]
Then, the high-temperature air B compressed in the cylinder 16 by compressing the ambient air D using the compressor 17 is compressed and accumulated to about 29.4 MPa (300 kgf / cm ² ), for example, and the temperature rises. The saturated vapor pressure value is extremely increased. Therefore, although this high-pressure air B contains a large amount of moisture, that is, water vapor with accumulating pressure, these hold the vaporized state.
Thereafter, as shown in FIG. 1B, each cylinder 16 in which such high-pressure air B is accumulated is stored thereafter, but is cooled to about room temperature with outside air D during storage. .
Therefore, the high-pressure air B accumulated in each cylinder 16 is also cooled to about room temperature, and the saturated vapor pressure value is lowered. Therefore, the high-pressure air B is originally compressed from the outside air D at room temperature as described above, but contains a large amount of moisture as it is compressed. Even if it is%, a large amount of remaining moisture, that is, water vapor condenses, and becomes water C and accumulates at the bottom of each cylinder 16.
{Circle around (1)} In the preparation step, high-pressure air B in a state where a lot of moisture, that is, water vapor is removed as water C is accumulated in each cylinder 16 and stored in the loading equipment 7 in this way.
[0018]
<< (2) Release step before loading >>
Next, as shown in FIG. 1 (3), (2) in the discharge step before loading, the high-pressure air in the cylinder 16 is directed toward the tank 3 under atmospheric pressure before loading the powder A. B is released and the tank 3 is filled with dry air E.
That is, before loading the granular material A into the granular material transport vehicle 1 or the tank 3 of the container, the high pressure air B in the prepared cylinder 16 is depressurized toward the tank 3 under atmospheric pressure. The flow rate is adjusted appropriately and discharged.
Accordingly, the inside of the tank 3 in which the granular material A is loaded is filled with the dry air E that has been released and expanded, and the air that has been dampened in the tank 3 is sent to the outside air D to prepare for loading. Is completed.
[0019]
The release step before loading (2) will be described in further detail. One cylinder 16 having a capacity of 47 L, for example, stored and prepared in the preparation step {circle around (1)} described above is used, and the high-pressure air B accumulated in the cylinder 16 passes through the connection hose 21, the pressure reducing valve 18, and the like. Then, it is discharged into the tank 3 from a dedicated inlet 22 on the tank 3 side of the granular material transport vehicle 1 or the like parked in the loading facility 7.
The pressure and flow rate of the high-pressure air B released in this way is adjusted by the pressure reducing valve 18 and the like, and the pressure is reduced to about atmospheric pressure.
For example, in the case of 29.4 MPa (300 kgf / cm ² ) in a 47 L cylinder 16, if the flow rate is set to 16 L / min, the high-pressure air B is released into the tank 3 over about 15 hours. Of course, it is expected that the flow rate is further increased and released in about 8 hours, and the flow rate may be further increased to be released within a few tens of minutes. Such flow rate adjustment is performed by the pressure reducing valve 18 or the like.
[0020]
The high-pressure air B thus discharged into the tank 3 becomes extremely dry air E.
That is, the tank 3 is switched to open the exhaust valve 23 provided in advance, and the tank 3 is kept under atmospheric pressure.
Accordingly, the high-pressure air B expands by being released into the tank 3 while being depressurized to about atmospheric pressure (for example, that of 47 L is about 14 m ³ or more), and the contained moisture is proportionally increased. The ratio of water vapor, that is, the water vapor pressure, is greatly reduced.
[0021]
Thus, based on the release of the high-pressure air B, the dry air E having extremely low humidity is generated in the tank 3 and is filled with the dry air E.
At the same time, the humid air that has been in the tank 3 until then is sent out from the open exhaust valve 23 to the outside air D. Of course, the dry air E spreads in the tank 3 and absorbs some moisture, that is, water vapor from the air that has been in the tank 3 until then. The open exhaust valve 23 is then switched to closed.
(2) In the discharge step before loading, the inside of the tank 3 is filled with the dry air E in this way.
[0022]
<< (3) Loading of granular material A, transport step, etc. >>
Then, from the manhole 4 provided on the tank 3, the powder A is loaded into the tank 3 in a loosely spread state.
That is, in the loading facility 7, cement, wheat flour, chemical products, and other granular materials A are separated from the manhole 4 on the tank 3 into the tank 3 after the above-described release step 2 before loading. (See FIG. 2 (1)).
In the loading facility 7, the granular material transport vehicle 1 loaded with the granular material A and the tank 3 of the container are parked and stored in a parking lot as necessary ((2) in FIG. 2). 2) (see (2) in FIG. 2) and unloaded in the unloading facility 8 (see (3) in FIG. 2).
[0023]
<< (4) Release step after loading >>
Now, after such loading of the granular material A, during transportation such as parking storage and transportation, as shown in FIG. 1 (4), under the atmospheric pressure where the granular material A is loaded. The high pressure air B in the cylinder 16 is discharged toward the tank 3, and the tank 3 is filled with the dry air E.
That is, in the above-described (3) loading and transporting step of the granular material A, that is, immediately after loading, during parking storage, during transportation, etc., toward the tank 3 under atmospheric pressure where the granular material A is loaded, Again, the high-pressure air B in the prepared cylinder 16 is discharged while adjusting the flow rate as appropriate while reducing the pressure.
Therefore, the tank 3 loaded with the granular material A is filled with the dry air E that has been released and expanded, and the humid air that has flowed into the tank 3 along with the loading or loaded. The humid air generated from the powder A and the other humid air are sent out to the outside air D.
[0024]
Such a release step after (4) loading will be further described in detail. In the tank 2 filled with the dry air E in the discharging step before loading (2) described above, in the loading step of the loading unit 7, (3) in the loading step of the granular material A, Body A is loaded.
And with such loading, the air which got wet with the granular material A flows into the tank 3 through the manhole 4. Furthermore, moisture is also generated from the powder A loaded in the tank 3 and fills the tank 3. Further, humid air remaining in the tank 3 from the beginning can be considered.
Therefore, the high-pressure air B in the prepared cylinder 16 is discharged again into the tank 3, so that the tank 3 loaded with the powder A is filled with the dry air E that is dried.
Release of the high pressure air B from the cylinder 16 into the tank 3, the time, generation of dry air E based on the released high pressure air B, delivery of the humid air from the exhaust valve 23 to the outside air D, etc. Regarding (2), the discharging step prior to loading is the same as described above, and the description thereof will be omitted.
[0025]
And the release after such loading is a. Immediately after loading in the loading facility 7, or b. During parking storage in a parking lot etc., c. It is carried out during transportation on the road to the unloading facility 8.
That is, it is implemented in any one of these a, b, c, or all of a, b, c, or a combination of two sets in i, b, c.
In principle, for example, one cylinder 16 having a capacity of 47 L is used once for each implementation. When the parking storage is performed for a long time such as several days, a plurality of cylinders 16 are used and replaced at a rate of one per day. C. In the case of carrying out during transportation, a large number of cylinders 16 having a capacity of 4L or the like are used and carried out at one time or divided into a plurality of times.
When the high pressure air B is discharged, the exhaust valve 23 of the tank 3 that has been switched to open is subsequently switched to close. (4) In the discharge step after loading, the tank 3 loaded with the powder A is filled with the dry air E in this way.
[0026]
<About the action>
The transportation method using the granular material transport vehicle 1 according to the present invention is configured as described above. Therefore, the following are first and second.
First, according to the transportation method using the granular material transport vehicle 1 or the like of the present invention, unloading immediately before loading the granular material A, immediately after loading the granular material A, during other parking storage, during transportation, etc. The tank 3 is filled with dry air E during the transportation up to this point.
Therefore, even when the outside air D temperature is decreased and the saturated vapor pressure value in the tank 3 is decreased, it is reliably prevented that water droplets are generated in the tank 3 due to condensation.
[0027]
That is, a. After loading the granular material A in the loading facility 7 (see FIG. 2 (1)), b. During parking storage in a parking lot etc. (especially at night) (see Fig. 2 (2)), c. When the outside air D temperature decreases during transportation from loading to unloading, such as during travel and transportation to the unloading facility 8 (see Fig. 2 (2)), water droplets are generated in the tank 3 To be prevented.
Even when the outside air D temperature is lowered and the saturated vapor pressure value in the tank 3 is lowered, the inside of the tank 3 is filled with the dry air E (FIGS. 1 (3) and 4 (4)). See).
Therefore, the humidity in the tank 3 is extremely low and does not exceed 100%, so that generation of water droplets due to condensation in the tank 3 is avoided.
[0028]
Secondly, this is easily and easily realized by cooling and discharging the high-pressure air B of the cylinder 16.
In other words, the high pressure air B is accumulated in the cylinder 16 and cooled to about room temperature (see FIGS. 1A and 1B), and the granular material transport vehicle is transported when the granular material A is transported. 1 and the tank 3 of the container, the first point described above is easily realized by a simple step of releasing the high-pressure air B (see FIGS. 1 (3) and (4)). The
That is, generation of water droplets in the tank 3 is prevented by the above-mentioned (1) preparation step, (2) discharge step before loading, and (4) discharge step after loading.
The operation is simple only by releasing the high-pressure air B from the cylinder 16 to the tank 3, and the equipment is simply prepared by preparing the compressor 17 and the cylinder 16.
[0029]
<Others>
First, although the illustrated example described above relates to the tank 3 of the granular material transport vehicle 1, the transport method of the present invention is not limited to this.
For example, the present invention can also be applied to the tank 3 of a container in which the granular material A is loaded and stored and transported, and this kind of container is mounted and transported in a vehicle such as a truck, a railway vehicle, a ship, and an aircraft. Is done.
[0030]
Secondly, in the transportation method of the present invention , the release of the high-pressure air B to the tank 3 is performed by a release step before loading (see FIG. 1 (3)) and a discharge step after loading (FIG. 1). (4) (See the figure) and both are essential.
[0031]
【The invention's effect】
<Features of the present invention>
As described above, the transportation method using the granular material transportation vehicle according to the present invention is a tank under atmospheric pressure before loading or during transportation of high-pressure air that has been pressured by a cylinder and cooled to about room temperature. The inside of the tank is filled with dry air, and the humid air in the tank is sent out to the outside air .
Therefore, the transport method using the granular material transport vehicle according to the present invention exhibits the following effects.
[0032]
<< First effect >>
First, the generation of water droplets in the tank is reliably prevented. That is, in the present invention, high-pressure air that has been pre-stressed and cooled to about room temperature and a large amount of moisture condensed and removed as water is discharged from the cylinder toward the powder carrier and container tank. The
Therefore, the moisture contained in the air in the tank and the moisture generated from the powder are sent out to the outside air, and the tank is filled with dry air.
[0033]
Therefore, even when the outside air temperature decreases during transportation from loading and unloading of the granular material, it is reliably prevented that water droplets are generated in the tank as in the above-described conventional example. Even if parking or transporting takes a long time, the generation of water droplets is avoided.
In particular, water droplets are prevented from being generated near the tank wall that is in contact with the outside air, and the loaded powder particles stick to the tank wall and cause mold, etc. And no solidification like granulated sugar.
Of course, as in the above-described conventional example in which the fan is rotated, the moisture in the outside air is not directly sent into the tank and the generation of water droplets is not induced.
[0034]
<< Second effect >>
Secondly, this is easily and easily realized. That is, in the present invention, the first point described above is easily realized by a simple step of cooling the cylinder with high-pressure air under pressure and releasing it toward the powder carrier or container tank. The
That is, as in the above-described conventional example, it is not necessary to keep the fan running during the transportation and storage, such as during parking storage (for example, at night) or during transportation after loading the granular material. In the present invention, it is only necessary to discharge high-pressure air from the cylinder to the tank as necessary, and the equipment is simple, so that it is excellent in terms of operation, cost, security and the like.
As described above, the effects exerted by the present invention are remarkably large, such as all the problems existing in this type of conventional example are solved.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory front view for explaining an embodiment of the invention for a transportation method using a granular material transport vehicle or the like according to the present invention, and (1) FIG. (2) The figure shows the prepared cylinder, (3) The figure shows the step of releasing high-pressure air to the tank before the loading of the powder, (4) The figure shows the powder The step which discharges | emits high pressure air to the tank loaded is shown.
FIG. 2 is used to explain a granular material transport vehicle. (1) FIG. 2 shows steps for loading powder, (2) FIG. 2 shows steps during transportation, and (3) FIG. Indicates the steps inside.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Granule carrier 2 Chassis 3 Tank 4 Manhole 5 Wheel 6 Cab 7 Loading facility 8 Unloading facility 9 Silo 10 Discharge valve 11 Discharge port 12 Canvas conduit 13 Silo 14 Discharge tube 15 Receiving tube 16 Cylinder 17 Compressor 18 Pressure reducing valve 19 Safety valve 20 Filter 21 Connection hose 22 Inlet 23 Exhaust valve A Granule B High pressure air C Water D Outside air E Dry air

Claims (1)

A method for transporting cement, flour, chemicals, and other powders in a powder carrier or container tank,
In advance, after high-pressure air was compressed in a cylinder with a compressor, it was cooled to about room temperature, and the condensed water was accumulated in the lower part of the prepared cylinder, so that moisture was removed as the water. Store the high-pressure air in the cylinder,
The first, after switching the exhaust valve is attached to the tank to open, directed into the tank at atmospheric pressure before loading the powder granules, releasing high pressure air of the cylinder, with, the tank with satisfying a dry air inflated inner is released, the air that damp in the tank, since the left and feed to the outside air from the opening of the exhaust valve, switching the exhaust valves closed,
After then, the manhole which is attached to the said tank, I loading the powder granules in bulk form Chiseki state to said tank,
After the subsequent loading, during transportation such as parking storage, transportation , etc., the high-pressure air from the cylinder is released toward the tank under atmospheric pressure where the powder is loaded and the exhaust valve is switched to open. , has been, together with filled with dry air inflated been released the tank, the air was damp other moisture arising from moisture and powder or granular material which has flowed into the tank at the time of loading, opening of the exhaust valves After sending it out to the outside air, by switching the exhaust valve to close,
A transportation method using a granular material transport vehicle or the like, characterized in that, when the outside air temperature decreases before unloading, generation of water droplets due to condensation in the tank is prevented .

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