JPH087119B2 - Device for producing dry material of solid particles from suspension - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a device for producing dry material of solid particles from a suspension.

(Prior Art) For example, in the pulp and paper industry, controlling the pulp concentration
Controlling is very important for stable operation and obtaining a homogeneous paper pulp.

The pulp concentration is represented by the weight percentage of the absolutely dry weight of the fiber component contained in the pulp liquid with respect to the total weight of the pulp liquid.

By the way, in the measurement of pulp concentration, first, an operator manually extracts the pulp liquid from a pipe or a storage tank into a cup or the like, and measures the total weight thereof.

Next, the collected pulp liquid is squeezed and only the fiber component is taken out to prepare a sheet-shaped intermediate material. The sheet-shaped intermediate material taken out is heated in, for example, an oven to prepare a sheet-shaped final material. The heating conditions are, for example, 130 ° C. and 2 hours.

Then, the absolute dry weight of the sheet-shaped final material is measured, and the ratio of the absolute dry weight to the total weight is calculated. With this, the pulp concentration is calculated.

(Problems to be Solved by the Invention) According to the above conventional configuration, there are the following problems.

As already mentioned, all of the pulp concentration measurement work was performed manually by the workers, and it was not quick and the measurement accuracy was never high.

Therefore, it takes a lot of labor and a long time to manufacture the sheet-like material for measuring the pulp concentration,
Automation of those tasks was required. In particular, it is difficult to further dehydrate and heat the dehydrated sheet-shaped intermediate material to prepare a dry sheet-shaped final material, which requires a long time.

The present invention has been made on the basis of such a point, and an object thereof is to develop an apparatus for automating an operation of manufacturing a sheet-shaped material, and in particular, a dehydrated one is Further dehydration and heating,
An object of the present invention is to provide an apparatus capable of automatically producing a dry sheet-shaped material.

(Means for Solving the Problems) In order to achieve the above object, an apparatus for producing a dried material of solid particles from a suspension of the present invention is a mother tube through which the suspension flows or a storage tank for storing the suspension. A collecting mechanism for collecting a part of the suspension flowing in the mother pipe or the storage tank through the hopper connected in a branched manner, and water spraying on the collecting mechanism and the inner wall of the hopper to wash away the attached suspension. A sampling means including a watering mechanism, a filter disposed below the hopper, and a stirring tank selectively capped on the filter are provided, and the suspension collected by the sampling means is filtered. The suspension is stirred by receiving it in the upper stirring tank and supplying compressed air to it, and at the same time stirring the suspension to dehydrate it by vacuuming from below the filter to produce a sheet-like intermediate material on the filter. dehydration A step, a reversing / transfer means for reversing the filter and the sheet-like intermediate material 180 ° and transferring it to a heating position in a state where the stirring tank is removed from the filter, and a peeling means for peeling the sheet-like intermediate material from the filter. And an upper heating plate and a lower heating plate, the sheet-shaped intermediate material inverted and transferred by the inversion / transfer means is received on the lower heating plate, and the lower heating plate and the upper heating plate are brought close to each other for compression / dehydration. In addition, in the apparatus for producing the dried material of the solid particles from the suspension comprising the compression / heating means for producing the sheet-shaped final material by heating / drying, the compression / heating means are mutually An electromagnetic wave heating device is provided on at least one of a pair of heating plates arranged so that they can come into contact with and separate from each other, and a groove for letting off steam generated by heating is provided on at least one surface of the heating plate. And it is characterized in that it is formed.

(Operation) First, a sheet-like material of solid particles is formed from a suspension by a predetermined device. Then, the dehydrated product is placed between the pair of heating plates, and in that state, the pair of heating plates are brought close to each other to compress and dehydrate.

At the same time, heating by a heating source is added and dried to prepare a dry sheet material. An electromagnetic wave heating device is used as the heating means, an electromagnetic induction coil is built in the heating plate, and an electric current is passed therethrough. As a result, magnetic field lines are generated. On the other hand, if a metal plate is installed on the end surface of the heating plate, the action of the magnetic lines of force changes the current into a spiral current, which causes the metal plate to generate heat. The heat generated by this metal plate causes it to be heated and dried.

In addition, since the groove for letting out steam is formed in the heating plate, the steam generated at the time of heating escapes, and steam / explosion does not occur, heating and drying are effectively performed, and the heating time can be greatly shortened. .

(Embodiment) A first embodiment of the present invention will be described below with reference to FIGS. This example shows an example in which the apparatus for producing a dried material of solid particles from a suspension according to the present invention is applied to a paper pulp concentration measuring apparatus.

First, the schematic configuration of the paper pulp concentration measuring device will be described. FIG. 1 is a front view showing the overall configuration of the pulp concentration measuring device according to the present embodiment, and a sampling device 3 is installed above the frame body 1. The sampling device 3 collects a predetermined amount of pulp liquid.

A table 5 is installed at a substantially intermediate position in the vertical direction of the frame body 1. On the table 5, a stirring / dewatering means 7 for creating a sheet-shaped intermediate material, and a reversing / transfer means for transferring the sheet-shaped intermediate material. 9, peeling means 10 for peeling the sheet-shaped intermediate material from the filter, compression / heating means 11 for producing the sheet-shaped final material, transfer means 12 for transferring the sheet-shaped final material to the weighing position, and further the sheet-shaped final material at the weighing position. A weighing means 16 for weighing the absolutely dry weight of the material is installed.

The pulp liquid collected by the sampling means 3 is transferred to the stirring / dewatering means 7, where the sheet-shaped intermediate material 13
Is formed. The sheet-shaped intermediate material 13 thus formed is
It is conveyed to the compression / heating means 11 by the inversion / transfer means 9. The sheet-shaped intermediate material 13 is then peeled from the filter by the peeling means 10.

The sheet-shaped intermediate material 13 is further dehydrated and dried by the compression / heating means 11 to become a sheet-shaped final material 14. The sheet-shaped final material 14 is transferred to the weighing position by the transfer means 12, and the absolutely dry weight thereof is measured by the weighing means 16. Then, the ratio to the already measured total weight of the collected liquid is calculated.

The configuration of each unit will be sequentially described below. First, the stirring / dewatering means 7 will be described. Filter on table 5
15 are arranged, and the stirring tank 17 is placed on the filter 15.
Is installed.

The filter 15 is a metal mesh formed into a disc shape, and for example, a 100 mesh one is used, but the point is that it can capture the fiber components in the pulp liquid, and the material and shape are particularly preferable. It is not limited.

The stirring tank 17 has a hollow cylindrical shape and is selectively capped on the filter 15. That is, the working rod 22 of the rotary actuator 21 is connected to the stirring tank 17, and by driving this rotary actuator 21, the stirring tank 17 is disengaged from the filter 15 as shown by the chain double-dashed line in the figure. be able to. In this way, the stirring tank 17 is detached when the formed sheet-shaped intermediate material 13 is taken out.

Below the filter 15, a suction tank 23 is arranged,
Below the suction tank 23, a vacuum pump 25 is arranged and an air compressor 26 is arranged.

Between the vacuum pump 25 and the suction tank 23, a pipe 27 having an opening / closing valve 28 interposed is arranged. A pipe 29 is extended from the air compressor 26, and a pipe 31 is branched from the pipe 29 and connected to a pipe 27 on the suction tank 23 side. An on-off valve 35 is inserted in the pipe 31.

When stirring the pulp liquid carried into the stirring tank 17, compressed air is supplied from the air compressor 26 through the pipes 29 and 31. In addition, when water in the pulp liquid is sucked and removed after stirring, a vacuum pump 25 is evacuated through a pipe 27. Further, after returning to a normal state after evacuation, compressed air is supplied again by the air compressor 26.

 The peeling means 10 has the following configuration.

First, a pipe 33 is branched from the pipe 29, and an opening / closing valve 37 is inserted in the pipe 33. Meanwhile, filter 15
The air pipes 36 are arranged in a cross shape on the lower surface side of the air pipes 36. These air pipes 36 are gathered into one air pipe 38, and the nozzles 39 attached to the inner wall of the suction tank 23 described above are used. And is connected to the pipe 33.

The air supplied from the air piping 33, 38, 36 is
The sheet-shaped intermediate material 13 is exfoliated from the filter 15 by ejecting it from a plurality of compressed air ejection nozzles formed in the pipe 36.

The sheet-shaped intermediate material 13 is peeled off from the filter 15 after being inverted / transferred by the inversion / transfer means 9.

The inversion / transfer means 9 is a rotary actuator 43.
And the working rod 45 of the rotary actuator 43, and the working rod 45 is connected to the filter 15.

By driving the rotary actuator 43, the working rod 45 and the filter 15 are rotated by 180 °, and thereby the sheet-shaped intermediate material 13 placed on the filter 15 is conveyed to the compression / heating means 11.

Next, the compression / heating means 11 will be described. First, there is an upper heating plate 47, which is fixed above the table 5.

On the other hand, there is a lower heating plate 49 on the table 5, and the sheet-shaped intermediate material 13 is placed on the lower heating plate 49.

The lower heating plate 49 is connected to the working rod 53 of the shift cylinder 51. By driving the shift cylinder 51, the lower heating plate 49 is raised, and the placed sheet-shaped intermediate material 13 is sandwiched between the sheet and the upper heating plate 47.

Both the upper heating plate 47 and the lower heating plate 49 have an electromagnetic induction coil built therein, and a power source is connected to this electromagnetic induction coil, and temperature control is performed by a thermostat.

The electromagnetic induction coil may be built in only one of them.

In the case of the present invention, an electromagnetic heating system is adopted,
A line of magnetic force is generated by passing a current through the electromagnetic induction coil.

On the other hand, metal plates are attached to the end surfaces of the upper heating plate 47 and the lower heating plate 49, and when the magnetic lines of force pass through these metal plates, they change into a spiral current. This causes the metal plate to generate heat, which heats the sheet-shaped intermediate material 13.
dry.

Further, as shown in FIG. 6, a groove is formed on the upper surface of the lower heating plate 49.
50 are formed. Through this groove 50, steam generated at the time of heating is released to improve heating efficiency, and the risk of steam explosion is prevented, while shortening the heating time.

Further, as shown in FIGS. 1 to 3, compression / heating means
A chute 55 is formed on the side of 11, and the sheet-shaped final material 14 produced by compression and heating is pushed into the chute 55 by the transfer means 12. This shoot 55
The above-mentioned measuring means 16 is arranged below the.

In the present embodiment, the weighing means 16 includes a bracket 56,
It is composed of an electronic scale 57.

As shown in FIG. 3, the transfer means 12 comprises a rotary actuator 58 and a working rod 59 of the rotary actuator 58. By rotating the working rod 59 on the lower heating plate 49, the lower heating plate 49 is rotated. 49 Sheet-like final material
14 is discharged into the chute 55.

Next, the configuration of the sampling means 3 will be described.
As shown in FIG. 4, a hopper 65 is connected via a branch pipe 63 to the mother pipe 61 through which the pulp liquid to be measured flows. The hopper 65 has a pulp liquid feeding port 67 at its lower end, and this pulp liquid feeding port 67 is located at the upper end of the stirring tank 17 already described.

Inside the hopper 65, as shown in FIG.
69 are arranged. The collecting mechanism 69 is configured by coaxially fixing two plates 71 and 73 via a shaft 75. The outer diameters of the plates 71 and 73 are dimensioned so as to be closely fitted to the inner diameter of the branch pipe 63 so as to allow movement.

On the other hand, a shift cylinder 77 is installed outside the hopper 65, and a working rod 79 of the shift cylinder 77 penetrates the hopper 65 and is connected to the shaft 75.

By driving the shift cylinder 77, the shaft 75 is reciprocally moved through the working rod 79, whereby the two plates 71 and 73 are connected to each other by the mother pipe 61, as shown by a chain double-dashed line in FIG.
Infest in. Then, a part of the pulp liquid is sandwiched between the two plates 71, 73 and collected in the hopper 65. The collected pulp liquid is charged into the stirring tank 17 via the pulp liquid charging port 67.

The amount of pulp liquid to be collected is determined by the distance between the two plates 71 and 73, and a desired amount of pulp liquid can be collected by appropriately adjusting this distance.

A water sprinkling mechanism 81 is installed above the collecting mechanism 69. The water sprinkling mechanism 81 includes a water supply pipe 83 and two water sprinkling nozzles 85 and 87 connected to the water supply pipe 83 and arranged in the hopper 65.

The water sprinkling mechanism 81 sprinkles water on the inner walls of the collecting mechanism 69 and the hopper 65, thereby washing away the pulp liquid adhering to the inner walls of the collecting means 69 and the hopper 65. The washed pulp liquid and water are put into the stirring tank 17 through the pulp liquid inlet 67.

As shown in FIG. 1, a liquid level sensor 89 is installed in the stirring tank 17, and the liquid level sensor 89 is used to stir the stirring tank.
Monitor the liquid level in 17 and turn on the sprinkling means 81.
Control off. The operation will be described based on the above configuration.

First, the pulp liquid sampling will be described. That is, the shift cylinder 77 is driven to cause the collecting means 69 to project and retract in the mother tube 61, and the two plates 71 and 73
Collect part of the pulp liquor. The collected pulp liquid is charged into the stirring tank 17 via the pulp liquid charging port 67 of the hopper 65.

At this time, the water sprinkling mechanism 81 sprinkles water. By this sprinkling, the pulp liquid adhering to the inner walls of the collecting mechanism 69 and the hopper 65 is washed away, and is poured into the stirring tank 17 together with the sprinkled water.

The signal from the liquid level sensor 89 provided in the stirring tank 17 stops the watering by the watering means 81. Next, the sheet-shaped intermediate material 13 is formed. A filter 15 is arranged below the stirring tank 17, and further below that, a suction tank 23.
Is installed. The sampled pulp liquid fills the stirring tank 17, the filter 15, and the suction tank 23.

In this state, the compressed air from the compressor 26
It is fed via 29 and 31, and the pulp liquid is stirred. By this stirring, the fiber component in the pulp liquid is uniformly dispersed.

Next, the vacuum pump 25 draws a vacuum through the pipe 27. By this evacuation, the water in the pulp liquid is sucked and removed, and the fibers in the pulp liquid are adsorbed on the filter 15. This is the sheet-shaped intermediate material 13, which has a moderately dehydrated and uniform thickness.

Next, the evacuation is stopped, and the compressed air is again supplied from the compressor 26 to release the vacuum state.

Next, the sheet-shaped intermediate material 13 is transferred. First,
The stirring tank 17 is withdrawn as indicated by the chain double-dashed line in FIG.
Next, the rotary actuator 43 is driven and the working rod 45
Rotate 180 degrees. As a result, the filter 15 rotates 180 °, and the sheet-shaped intermediate material 13 is conveyed onto the lower heating plate 49 of the compression / heating means 11. At this time, since the filter 15 is inverted, the sheet-shaped intermediate material 13 is located on the lower side and is directly placed on the lower heating plate 49.

After the sheet-shaped intermediate material 13 is conveyed, this is filtered 15
Make it more peeled. That is, the pipe 33, the nozzle 39, and the pipe 3
8, 36, filter 1 through multiple compressed air jet nozzles
Compressed air is supplied from the upper side of 5. The sheet-shaped intermediate material 13 is separated from the filter 15 by the supply of the compressed air.

Then, the rotary actuator 43 is driven again,
Return the filter 15 to its original position.

Next, the dehydration / drying process of the sheet-shaped intermediate material 13 is started.
As shown in FIG. 6A, the sheet-shaped intermediate material 13 is on the lower heating plate 49, and in this state, the shift cylinder 51 is driven to raise the lower heating plate 49 via the operating rod 53. Let

As a result, as shown in FIG. 6B, the sheet-shaped intermediate material 13 placed on the lower heating plate 49 is sandwiched between the upper heating plate 47. Then, the sheet-shaped intermediate material 13 is heated and dried to create the sheet-shaped final material 14. At that time, since the generated steam flows out through the groove 50, there is no fear of steam explosion, the heating efficiency is high, and the heating time is short.

The pressing force applied by the upper heating plate 47 and the lower heating plate 49 is, for example, about 5 kg / cm ² , and the heating temperature is about 140 ° C.

When the predetermined heating is completed, the lower heating plate 49 is lowered to return to the original position.

Next, the process of taking out the sheet-shaped final material 14 is started. That is, the rotary actuator 58 is driven to move the working rod 59.
Rotate. As a result, the sheet-shaped final material 14 placed on the lower heating plate 49 is pushed in the direction of the chute 55 and drops onto the weighing means 16 via the chute 55.
Then, the measuring means 16 measures the absolute dry weight. Further, the pulp concentration is calculated from the absolute dry weight and the total weight which has already been measured.

According to the present embodiment, the following effects can be obtained.

First, the sheet-shaped final material 14 in a dry state can be automatically created. In other words, raise the lower heating plate 49,
The sheet-shaped intermediate material 13 may be sandwiched between it and the upper heating plate 47, and heated and dried in that state.

Since it uses the electromagnetic wave heating method, the flame, red heat part,
It is safe and clean with no exhaust gas. Since the temperature is controlled by the thermostat, it is possible to efficiently heat at an appropriate temperature and prevent burning.

Further, since the groove 50 is formed on the upper surface of the lower heating plate 49 so that the steam generated at the time of heating is released, there is no fear of steam explosion, the heating efficiency is high, and it is possible to dry in a short heating time. it can.

Further, this makes it possible to automatically measure the pulp concentration. Therefore, it is possible to reduce the labor and time required for measuring the pulp concentration. In particular, the sheet-shaped final material 14 required for measuring the pulp concentration can be efficiently created, which is extremely effective in improving the efficiency of the pulp concentration measurement work.

The present invention is not limited to the above-mentioned one embodiment.

For example, there are various configurations for bringing the heating plate into and out of contact with each other. Which one is to be moved is arbitrary, or both may be moved.

Also, the grooves for letting out steam may be formed in the upper heating plate, and the number, size and shape thereof are not particularly limited.

(Effects of the Invention) As described in detail above, according to the apparatus for producing dried data of solid particles from the suspension according to the present invention, it is possible to efficiently create data used for various measurements and analyses, and Since it can be performed automatically, the labor required for preparing the material can be reduced and the time required for the preparation can be shortened.

Particularly, the compression / heating means is provided with an electromagnetic wave heating device on at least one of a pair of heating plates arranged so as to be able to come into contact with and separate from each other, and vapor generated by heating is released to the surface of at least one of the heating plates. Since the groove is formed, it is possible to automatically prepare a dry sheet-shaped material, and it is safe and clean.

Further, by letting the steam generated at the time of heating escape through the groove, it is possible to prevent the possibility of steam explosion and to significantly shorten the heating time.

[Brief description of drawings]

1 to 6 are views showing an embodiment of the present invention. FIG. 1 is a front view of a pulp concentration measuring device, and FIG. 2 is a view of FIG.
II-II sectional view, FIG. 3 is a view taken along the line III-III in FIG. 1, and FIG.
The figure is a view taken along the line IV-IV in FIG. 1, FIG. 5 is a cross-sectional view of the sampling device, and FIGS. 6 (a) and 6 (b) are views showing a process for producing a sheet-shaped final material. 11 …… Compression / heating means, 13 …… Sheet intermediate material, 14…
… Sheet final material, 47 …… Upper heating plate, 49… Lower heating plate, 50… Groove, 51… Shift cylinder, 53… Working rod.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area F26B 23/08 A

Claims (1)

[Claims] 1. A collection for collecting a part of the suspension flowing through the mother pipe or the storage tank through a hopper branched and connected to a mother pipe through which the suspension flows or a storage tank for storing the suspension. Sampling means consisting of a mechanism, the collection mechanism and a water sprinkling mechanism for sprinkling water on the inner wall of the hopper to wash off the suspension adhered thereto, a filter arranged below the hopper, and selectively on the filter. A stirring tank to be capped, the suspension collected by the sampling means is received in a stirring tank on the filter, and compressed air is supplied to the stirring tank to stir the suspension, and With the stirring / dewatering means for dehydrating by pulling a vacuum from below to produce the sheet-shaped intermediate material on the filter, and the stirring tank removed from the filter, the filter and the sheet-shaped intermediate material are inverted 180 °. The reversing / transfer means for transferring to the heating position, the peeling means for separating the sheet-like intermediate material from the filter, and the upper heating plate and the lower heating plate are provided, and the sheet-like intermediate material reversed / transferred by the reversing / transferring means is provided. A suspension comprising a compression / heating means for receiving on a lower heating plate, compressing / dehydrating by bringing the lower heating plate and the upper heating plate close to each other, and heating / drying to produce a sheet-shaped final material. In an apparatus for producing dried material of solid particles from a liquid, the compression / heating means is provided with an electromagnetic wave heating device on at least one of a pair of heating plates arranged so as to be able to come into contact with and separate from each other,
An apparatus for producing a dried material of solid particles from a suspension, characterized in that a groove for letting out steam generated by heating is formed on at least one surface of the heating plate.