JP2001347107A - Device for filtering and drying - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filtering and drying device having disintegrating device provided in a filter vessel, in which the filtration of a slurry and the drying of a cake are performed, to prevent the granulation of the cake. SOLUTION: In the filtration and drying device having a conical part 3 on one side of a drum part 2, provided with a filter plate 4 in the bottom part of the drum part 2 in the opposed side to the conical part 3 and performing the filtration of the slurry and the drying of the case by the filter vessel 1 rotatable around the rotary shaft 6, the disintegrating device 9 for the cake is mounted in the drum part or the conical part 3 in the filter vessel 1 in the direction crossing the rotary shaft 6 at a right angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtration / drying apparatus for continuously filtering and drying a slurry substance, and more particularly to a filtration / drying apparatus capable of finely crushing a dried substance.

[0002]

2. Description of the Related Art In a wide range of industrial fields such as foods, chemicals and pharmaceuticals, various substances are produced and produced. In particular, when a slurry-like substance is produced, the slurry is filtered in a filtration tank to form a cake, and the cake is dried to obtain crystals and powder.

FIG. 7 shows an example of a conventional filtration / drying apparatus. In a filtration tank a, a conical portion c is integrally formed on one side (an upper side in the drawing) of a cylindrical body b. At the same time, on the opposite side of the conical portion c, a filter plate d is provided at the bottom in the body portion b, and the outer periphery of the body portion b has a double wall structure covered with a jacket e. The rotating shafts f are provided on both sides of the body b, and each rotating shaft f is supported by a bearing h on a support base g erected on a ground contact surface, and one of the rotating shafts f1 is supported. It is rotatable by a rotation drive mechanism such as a motor (not shown).

[0004] In order to perform a filtration operation using the above-described device,
A slurry supply pipe (not shown) is connected to a slurry supply port i formed at the top of the conical portion c to continuously supply slurry into the body b. If the filtration treatment is performed while the pressure in the filtration tank a is increased or reduced, the slurry is filtered by the filter plate d, and a cake j is formed on the filter plate d. The filtrate passes through the filter plate d and is formed at the lower part of the body b at the filtrate outlet k.
From a filtrate discharge pipe (not shown).

When a cake layer j having a predetermined thickness is formed, the supply of the slurry is stopped, and the cake j is dried. In order to perform the drying process of the cake j, a method of continuously rotating the filtration tank a in one direction about the rotation axis f, and a method of continuously inverting the filtration tank a in one side vertically about the rotation axis f. There is a method.

As described above, the periphery of the body b is covered with the jacket e.
A heating medium such as hot water, hot air, or steam is supplied from outside (in the direction of arrow A) into the jacket e to circulate and heat the entire body b. , And the heat medium is discharged from the arrow B to the outside.

In the rotary drying, the filter tank a is rotated about a rotation axis f while the body b is heated while the pressure in the body b is reduced, and the cake formed on the filter plate d is formed. j
Circulates in the body b up and down or in the direction of rotation and is gradually dried to finally produce crystals or powder.

[0008] The reversal drying is carried out by the applicant of the present invention.
An application was filed on September 3, 2001 as Japanese Patent Application No. 11-249779. This is to invert the filtration tank a continuously in the vertical direction on one side about the rotation axis f to dry the cake j. Then, in either case of the rotating type or the reversing type, after performing the drying treatment for a necessary time, the crystal or the powder is taken out with the conical portion c facing downward, and the slurry supply port i is provided with the dried crystal. Also serves as a discharge port for powder and granules. During drying, the carrier gas is supplied into the filtration tank a from the direction of arrow C.

[0009]

SUMMARY OF THE INVENTION The conventional filtration and
In the drying apparatus, when the substance to be filtered and dried contains fine particles, the filterability is poor and the water content of the cake is high. In addition, some treatment substances have a high viscosity and are easily adhered. When a substance having such a high water content or a substance having adhesiveness is dried, the substance tends to be granulated in the filtration tank a. The granulated material, unlike crystals and powders, has a low specific surface area and therefore has a high internal water content, and therefore has an extremely long drying time.
The longer the drying time, the longer the rotation and inversion time of the filtration tank a, and the greater the economic burden of maintaining and managing the filtration tank a.

In view of the above-mentioned various problems of the conventional filtration / drying device, the present invention provides a filtration / drying device capable of preventing granulation by providing a cake crushing device in a filtration tank.
It is an object to provide a drying device.

[0011]

In order to achieve the above-mentioned object, the apparatus according to the present invention has a conical section 3 on one side of a body section 2;
A filter plate 4 is provided in the bottom of the body 2 on the side opposite to the cone 3.
And the filtration tank 1 rotatably supported by the rotating shaft 6
Filtration of slurry and drying of cake
In the drying device, a cake crushing device 9 is installed on a side surface of the filtration tank 1 in a direction orthogonal to the rotating shaft 6.

The crushing device 9 is installed on one side or both sides of the body 2 of the filtration tank 1 or on the conical portion 3.
The crushing device 9 is installed on both the body 2 and the conical portion 3. In the above-mentioned apparatus, the crushing device 9 makes the rotary blade 1 rotatable, or makes the crushing plate 13 slightly vibrate.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows the entirety of the filtration / drying apparatus of the present invention. In FIG. 1, reference numeral 1 denotes a filtration tank, and a conical portion 3 is integrated with one side (upper in the drawing) of a cylindrical body 2. And conical part 3
A filter plate 4 is provided at the bottom of the body 2 on the opposite side of
The outer periphery of the body 2 and the conical part 3 has a double wall structure covered with a jacket 5.

On both sides of the body 2, rotating shafts 6 are protruded, and each rotating shaft 6 is supported by a bearing 8 on a support stand 7 erected on a ground contact surface, and one of the rotating shafts 6 is supported. The filtration tank 1 can be rotated by an appropriate rotation drive mechanism.
Has the same structure as the above-mentioned conventional filtration tank.

In the present invention, a crusher 9
Is provided. Next, the crushing device 9 will be described in detail. 2 to 4 show an example of the crushing device 9 and show a state where the crushing device 9 is installed on one side surface of the body 2. That is, the crushing blades 11 protrude into the filtration tank 1 via the support member 10 attached to one side surface of the body 2 in a direction orthogonal to the rotation shaft 6, and the crushing blades 11 are provided outside the filtration tank 1. , And can be rotated by a drive motor 12 provided between the support member 10 and the crushing blades 11.

The crushing blade 11 cuts and crushes the material to be dried by rotating the plate by the end face of the plate in the rotating direction. Even if the crushing blade 11 is a single plate, Alternatively, two plates may be arranged at an interval. Further, a plurality of plate members may be formed in a cross shape at intervals as shown in the figure.

FIG. 5 shows another example of the crushing apparatus 9 in which a dry substance is crushed by applying a slight vibration. That is, a crushing plate 14 is protruded into the filtration tank 1 via the support member 10 attached to the side surface of the body 2 in the same manner as described above, and a known vibration generator 15 installed outside the filtration tank 1 is provided.
Thereby, the crushing plate 14 is slightly vibrated.

The crushing plate 14 is finely vibrated up and down to crush the dried material at the upper and lower end surfaces of the plate body, or the crushing plate 14 is finely vibrated in the left and right direction to make the crushing plate 14 The surface may be crushed by contacting and vibrating the dry substance. The crushing plate 14 may be a single plate. For example, as shown in FIG. 6, a plurality of crushing plates 14 are projected in parallel on the front surface of a substrate 16 directly connected to the vibration generator 15. It may be provided.

As in the conventional case, the slurry is supplied into the body 2 from a slurry supply port 17 formed at the top of the conical section 3, filtered by the filter plate 4, and the filtrate is discharged from a filtrate discharge port 18. Then, a cake 19 is formed on the filter plate 4 and then dried to crystallize and granulate the cake.
In the case of a method in which the filtration tank 1 is continuously rotated in one direction, if the filtration tank 1 is rotated in any direction, and the filtration tank 1 is in a horizontal state and the crushing device 9 is located below, The cake comes into contact with the crushing blades 11 of the crushing device 9.

In the case of the reversing type filter tank 1, the filter tank 1 is provided on the side having the crusher 9 around the rotating shaft 6 (FIG. 2).
When the filter tank 1 is in a horizontal state and the crushing device 9 is located below, the cake always comes into contact with the crushing blades 11 of the crushing device 9.

In the case of the rotary filter tank 1, the crusher 9 may be installed symmetrically on both sides of the body 2. Further, the crushing device 9 may be installed not only on the trunk portion 2 but also on the conical portion 3 as shown by a chain line in FIG. Since the area inside the conical portion 3 is smaller than the area of the body portion 2, the contact time between the cake and the crushing blades 11 is increased, and the crushing efficiency is improved.

Further, the crushing device 9 may be provided on the body 1 and the crushing device 9 may be provided on the conical portion 3. The installation position of the crushing device 9 in this case is determined by installing the crushing device 9 on one side of the body 2 and the crushing device 9 on the conical portion 3 on the same side, or as shown in FIG. The crushing device 9 may be installed on one side of the portion 2 and the crushing device 9 may be installed on the conical portion 3 at a position symmetrical to the installation position of the crushing device 9. When the crushing device 9 is installed on both the body portion 2 and the conical portion 3 as described above, the crushing device 9 can be used for both the rotary type and the reversing type filtration tank 1, and the cake can be dried in a short time. .

[0023]

According to the present invention described above, the crushing device 9 having the rotating crushing blades 11 or the vibrating crushing plate 14 is installed in the filtration tank 1, so that the filtration tank 1 can be used. If the drying process is performed by rotating or inverting the cake, the cake is crushed by the crushing blades 11 or the crushing plates 14, so that the cake is not granulated, but is crystallized and powdered in a short time. Can be. By shortening the drying time, the number of rotations and the number of inversions of the filtration tank 1 can be reduced, and the filtration tank 1 can be maintained and managed economically.

[Brief description of the drawings]

FIG. 1 is a sectional view of a filtration / drying apparatus of the present invention as viewed from the front.

FIG. 2 is a cross-sectional view of a main part of the filtration / drying device of the present invention as viewed from a side.

FIG. 3 is an enlarged side view of the crusher.

FIG. 4 is a front view of a crushing blade.

FIG. 5 is a side view showing another example of the crusher.

FIG. 6 is a plan view of a crushing plate.

FIG. 7 is a cross-sectional view of an example of a conventional filtration / drying apparatus viewed from the front.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filtration tank 2 Cylindrical trunk part 3 Conical part 4 Filtration plate 5 Jacket 6 Rotating shaft 7 Supporting stand 8 Bearing 9 Crushing device 10 Support member 11 Crushing blade 12 Drive motor 13 Seal material 14 Vibration crushing plate 15 Vibration generating device 16 Substrate 17 Slurry supply port 18 Filtrate discharge port 19 Cake

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) B01D 29/04 520F 520C 530D (72) Inventor Satoshi Yamaguchi 2-17-15 Tsukushima Machine, Tsukushima Machine, Chuo-ku, Tokyo F term (for reference) 3L113 AA06 AC58 AC59 AC68 BA39 CB29 CB30 DA10 4D063 FF02 FF14 GA03 GC31 4D065 AA04 AA21 AA24 BB04 BB12 EB03 EB04 EB07 ED29

Claims (7)

[Claims] 1. A filter having a conical portion on one side of a body portion, a filter plate provided in a bottom portion of the body portion on a side opposite to the conical portion, and a filter rotatably supported by a rotating shaft. A filtration / drying device for filtering a slurry and drying a cake in the tank 1, wherein a cake crushing device 9 is provided on a side surface of the filtration tank 1 in a direction orthogonal to the rotating shaft 6. apparatus. 2. The filtration / drying device according to claim 1, wherein the crushing device is installed on one side surface of the body portion of the filtration tank. 3. The filtration / drying device according to claim 1, wherein the crushing device is installed on both side surfaces of the body portion of the filtration tank. 4. The filtration / drying device according to claim 1, wherein the crushing device is installed in the conical portion of the filtration tank. 5. The filtering and drying apparatus according to claim 1, wherein the crushing device 9 is provided on both the body 2 and the conical portion 3. 6. The filtering / drying device according to claim 1, wherein the crushing device 9 is configured to make the rotary blade 11 rotatable. 7. The filtering / drying apparatus according to claim 1, wherein the crushing device 9 is configured to slightly vibrate the crushing plate 13.