JP4067369B2 - Kneading equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a kneading apparatus (mixer) for kneading powder and / or granules and a liquid, and in particular, two rotating shafts each provided with a kneading member on the outer peripheral surface and laid parallel to each other in a casing of the apparatus. And kneading apparatus for kneading powder and / or granules and liquid.
[0002]
[Prior art]
In garbage incinerators, in order to detoxify the fly ash collected from the flue gas generated during incineration, the fly ash, activated carbon powder for dioxin adsorption, acid gas neutralizer, or solidifying cement, etc. Kneaded with a mixture of the above powder, a heavy metal dissolution preventing chemical solution (hereinafter simply referred to as a chemical solution) and dilution water, and the kneaded product (hereinafter referred to as a fly ash kneaded material) is indefinite. A process of solidifying into a granular or lump shape is performed. For the kneading, the above kind of kneading apparatus is used.
[0003]
In the structure of the kneading apparatus, an inlet for charging the powder is provided above one end of the elongated casing of the apparatus, and an outlet for discharging fly ash kneaded material is provided below the other end. . The two rotating shafts are installed in parallel with each other along the longitudinal direction of the casing. A rod as a kneading member is erected on the outer peripheral surface of each of the rotating shafts so as to be arranged in a spiral shape at predetermined intervals in the axial direction of the rotating shaft. The powder charged from the charging port is agitated by the rotating rod of the rotating shaft, and is sent to the discharging port side because the rod is arranged in a spiral shape. On the way, the above mixed liquid is injected from above, and the powder and the mixed liquid are kneaded by the rod to produce a fly ash kneaded product, which is discharged from the discharge port.
[0004]
[Problems to be solved by the invention]
However, in the configuration of the conventional kneading apparatus as described above, when the charged powder is moist, it sticks to the outer peripheral surface of the portion immediately below the inlet of the two rotating shafts and the rod of that portion. There was a problem that the powder could not be conveyed to the side well, and the powder and the mixed liquid could not be kneaded well and efficiently. Depending on the use of the kneading apparatus, there are cases where the particles and the liquid are kneaded, or the powder and the particles and the liquid are kneaded.
[0005]
Therefore, an object of the present invention is to solve the above-described problems in this kind of kneading apparatus, and even if the powder and / or granules put in the casing are moist and sticky, the powder and / or granules It is an object of the present invention to provide a configuration that allows kneading of a body and a liquid to be performed efficiently and efficiently.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, according to the present invention,
A kneading apparatus for kneading powder and / or granules and liquid,
A charging port for charging the powder and / or granules above one end in the longitudinal direction, and a kneaded product obtained by kneading the powder and / or granules and liquid below the other end. An elongated casing provided with a discharge port for discharging;
In the casing, it has two rotating shafts that are installed parallel to each other along the longitudinal direction of the casing and are driven to rotate,
In each of the rotating shafts, screw wings formed in a continuous spiral shape with a predetermined pitch along the axial direction of the rotating shaft are provided on the outer peripheral surface of the portion immediately below the inlet, On the outer peripheral surface of the portion on the discharge port side, a plurality of rods are erected so as to be arranged in a spiral shape at a predetermined pitch in the axial direction of the rotating shaft,
At the time of kneading, when the powder and / or granules are introduced into the casing from the inlet, the screw blades of the two rotating shafts that rotate rotate with the outer peripheral surface of the other rotating shaft and the screw blades. The powder and / or the particles adhered to both sides of the powder is scraped off to convey the powder and / or the particles to the discharge port side, and the liquid is injected at the discharge port side portion from the screw blade, The powder and / or particles and liquid are kneaded by a plurality of rods and conveyed to the outlet,
The diameters of the screw portions provided with the screw wings of the two rotating shafts are the same, and the two rotating shafts are such that the tips of the screw wings are in contact with the outer peripheral surface of the mating rotating shaft. The spiral winding method of each screw blade is reversed and the pitch is different, and it is rotationally driven in the reverse direction with the ratio of the screw blade pitch and the reciprocal number of rotations. And
The diameters of the two rotary shafts provided with the rods are the same, and the two rotary shafts scrape the kneaded material adhering to the outer peripheral surface of the other rotary shaft. A configuration is adopted in which the ratio of the angular pitch of the two rotating shafts in the circumferential direction of each rod to the circumferential direction is the same as the rotational speed ratio of the rotating shafts .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. Here, an embodiment of a kneading apparatus for kneading fly ash kneaded material in the above-described garbage incinerator is shown. Of course, the configuration of the kneading apparatus according to the present invention can also be applied to a kneading apparatus for kneading powder and / or granules and liquid other than the kneading of fly ash kneaded material.
[0008]
1 to 4 illustrate the structure and operation of the kneading apparatus of the embodiment. FIG. 1 is a plan view showing a state in which most of the upper side of the casing of the kneading apparatus is removed, and FIG. FIG. 3 is a cross-sectional view of a main part orthogonal to the axial direction of the rotation shaft of the kneading apparatus, and FIG. 4 is an explanatory view of a screw portion of the rotation shaft.
[0009]
1-3, 1 is a housing | casing of a kneading apparatus and is provided on the flame | frame 2 of a base. The casing 1 is formed in an elongated rectangular parallelepiped shape here. On the upper side of the right end portion in FIG. 2, fly ash, activated carbon powder for dioxin adsorption, and sulfuric acid neutralization are formed from a hopper (not shown). A loading port 1a for loading (dropping) powder such as slaked lime or solidifying cement into the housing 1 is provided, and the powder, the above-described drug solution and dilution are provided below the left end. There is provided a discharge port 1b for discharging (dropping) the fly ash kneaded material kneaded with the water mixture for use from the housing 1 onto a conveyor (not shown).
[0010]
In the housing 1, two rotating shafts 3 and 4 are laid in parallel to each other along the longitudinal direction thereof, and bearings 5 and 6 fixed to the outside of the left end portion of the housing 1 in FIG. In the vicinity of the outside of the right end of the housing 1, it is rotatably supported by two bearings 7 and 8 fixed to the outside of the gear case 9 provided on the frame 2.
[0011]
In the rotary shafts 3 and 4, the portions immediately below the input port 1 a are screw portions 3 a and 4 a having a larger diameter than the portion on the discharge port 1 b side, and the outer peripheral surfaces of the screw portions 3 a and 4 a are respectively Screw wings 3b and 4b formed in a continuous spiral shape with a predetermined pitch along the axial direction of the rotary shafts 3 and 4 are provided. The diameters of the screw portions 3a and 4a are the same, and the diameters of the screw blades 3b and 4b are also the same. However, the spiral winding directions of the screw blades 3b and 4b are opposite to each other. Further, the pitches of the screw blades 3b and 4b are also different. For example, as shown in FIG. 4, the pitch of the screw blades 4b is 1.25L with respect to the pitch L of the screw blades 3b. In addition, in the housing | casing 1, the screw guide 10 which covers the upper side of the screw blades 3b and 4b of the latter half part (part by the side of the discharge port 1b) of the screw parts 3a and 4a is provided so that an up-and-down position can be adjusted.
[0012]
A plurality of rods 3c and 4c as kneading members are provided in the axial direction of the rotary shafts 3 and 4 in the portion from the screw portions 3a and 4a of the rotary shafts 3 and 4 to the vicinity of the discharge port 1b on the discharge port 1b side. It is erected perpendicularly to the outer peripheral surfaces of the rotary shafts 3 and 4 so as to be arranged in a spiral shape with a pitch (interval) of a predetermined distance and a pitch of a predetermined angle in the circumferential direction. The diameters of the portions of the rotary shafts 3 and 4 where the rods 3c and 4c are provided are the same, the dimensions of the rods 3c and 4c are the same, and the pitches of the rods 3c and 4c in the axial direction of the rotary shafts 3 and 4 are also the same. It is. However, the pitches of the angles of the rods 3c and 4c in the circumferential direction of the rotary shafts 3 and 4 are different, for example, 45 ° and 36 °, respectively. In addition, the rods 3c and 4c are provided with only one strip on the rotary shafts 3 and 4 until halfway before the discharge port 1b, but a plurality of strips are provided in the vicinity of the discharge port 1b.
[0013]
Further, gears 11 and 12 are fixed to a portion of the rotary shafts 3 and 4 inserted into the gear box 9 at the right end portion in FIG. 1 and mesh with each other. The gear ratio of the gears 11 and 12, that is, the ratio of the number of teeth, is the same as the pitch ratio of the screw blades 3b and 4b, for example, 4: 5.
[0014]
Further, the right end of the rotating shaft 3 in FIG. 1 protrudes outward from the bearing 7, and a sprocket 13 is fixed to the right end.
[0015]
On the other hand, the frame 2 protrudes to one side outside the right end of the housing 1 in FIG. 1, and a motor 14 is provided on the protruding portion. A cyclo reducer 15 is connected to the rotating shaft of the motor 14, and a sprocket 16 is fixed to the output shaft. A chain 17 is stretched between the sprocket 16 and the sprocket 13.
[0016]
The rotational driving force in one direction of the motor 14 is transmitted to the rotating shaft 3 through the cyclo reducer 15, the sprocket 16, the chain 17 and the sprocket 13, and the rotating shaft 3 rotates in one direction. The rotation shaft 4 is transmitted to the rotation shaft 4 through 11 and 12, and the rotation shaft 4 rotates in the reverse direction.
[0017]
On the other hand, as shown in FIG. 2, the above-described chemical solution and heavy metal elution preventing solution are diluted on the upper part of the housing 1 near the discharge port 1b from the screw portions 3a and 4a of the rotary shafts 3 and 4. A pipe (nozzle) 18 for injecting a mixed liquid in which water for use is mixed is provided.
[0018]
By the way, in the above structure, the screw blade 3b scrapes off the powder adhering to both the outer peripheral surface of the screw part 4a and both surfaces of the screw blade 4b at the time of the kneading | mixing mentioned later, and the screw blade 4b is the outer peripheral surface of the screw part 3a and the screw blade 3b. Self-cleaning to scrape off the powder adhering to both sides of the rod, and the fly ash kneaded product in which the rod 3c adheres to the outer peripheral surface of the rotating shaft 3 by scraping off the fly ash kneaded material adhering to the outer peripheral surface of the rotating shaft 4 Self-cleaning to scrape off is performed.
[0019]
For this reason, the rotary shafts 3 and 4 have the screw blades 3b and 4b in between each other, the tip of the screw blade 3b is the outer peripheral surface of the screw portion 4a, and the tip of the screw blade 4b is the outer peripheral surface of the screw portion 3a. Are arranged so that the tip of the rod 3c is substantially in contact with the outer peripheral surface of the rotary shaft 4, and the tip of the rod 4c is substantially in contact with the outer peripheral surface of the rotary shaft 3. .
[0020]
Further, as described above, the pitches of the screw blades 3b and 4b are different. For example, the pitch ratio is 4: 5. The pitch ratio is not limited to this, and it may be N-1: N, where N is an integer of 2 or more.
[0021]
Further, the rotation shafts 3 and 4 are rotated at unequal speed, and the rotation speed ratio per unit time T of the rotation shafts 3 and 4 (ratio of the reciprocal of the gear ratio of the gears 11 and 12) is the screw blade 3b, The reciprocal ratio of the pitch ratio of 4b, that is, N: N-1, for example, 5: 4 as shown in FIG.
[0022]
Further, in order to prevent the rods 3c and 4c from colliding with each other, the ratio of the angular pitches of the rotation shafts 3 and 4 of the rods 3c and 4c in the circumferential direction is the same as the rotation speed ratio of the rotation shafts 3 and 4. N × n ° and (N−1) × n °, for example, N is 5 and n = N + (N−1) = 9, and the pitches are 45 ° and 36 ° as described above. And
[0023]
Next, operation | movement of the kneading apparatus of this embodiment is demonstrated.
[0024]
During kneading, the motor 14 is driven to rotate the rotary shafts 3 and 4 in opposite directions as indicated by arrows in FIGS. Then, fly ash, powder of activated carbon for dioxin adsorption, powder of slaked lime for sulfuric acid neutralization, cement for solidification, etc. are charged (dropped) into the casing 1 from the charging port 1a.
[0025]
At this time, the powder loaded with the screw blades 3b and 4b rotating together with the rotary shafts 3 and 4 operates to push the powder leftward in FIG. 1, and the powder is conveyed from the screw parts 3a and 4a to the discharge port 1b side. Is done.
[0026]
At the same time, a mixed liquid obtained by mixing a chemical solution for preventing heavy metal elution and water for dilution is injected from a pipe (nozzle) 18 into the housing 1 and powdered by the rotating rods 3c and 4c of the rotating shafts 3 and 4. And the mixed liquid are kneaded to produce a fly ash kneaded product. Since the rods 3c and 4c are arranged in a spiral shape, the fly ash kneaded material is further kneaded by the rods 3c and 4c and further sent to the discharge port 1b side, reaches the discharge port 1b and passes through the discharge port 1b on a conveyor (not shown). Discharged (falls).
[0027]
In this kneading operation, with the rotation of the rotary shafts 3 and 4, the tip portions of the screw blades 3b and 4b that are substantially in contact with the outer peripheral surfaces of the mating screw portions 4a and 3a are in the axial direction of the rotary shafts 3 and 4. 1 to the left in FIG. Thereby, the powder adhering to the outer peripheral surface of screw part 3a, 4a is scraped off.
[0028]
Further, due to the difference in pitch between the screw blades 3b and 4b, the left side surface of the screw blade 3b and the right side surface of the screw blade 4b are substantially in contact with each other as shown by the symbol P1 in FIG. It can be arranged so that there is a portion where the right side surface of the screw wing 3b and the left side surface of the screw wing 4b are substantially in contact with each other as shown by reference numeral P2. As the rotary shafts 3 and 4 rotate, the screw blades 3b and 4b slide at the positions P1 and P2, and scrape off the powder adhering to both the left and right sides of the partner screw blade. As the rotary shafts 3 and 4 rotate, the portions P1 and P2 move to the left in the figure, and after moving to the left end, fly to the right end and move again to the left from the right end. Thereby, powder is scraped off from both surfaces by mutual sliding over the whole screw blade 3b, 4b.
[0029]
Since the rotation speed ratio of the rotary shafts 3 and 4 is the reciprocal of the pitch ratio of the screw blades 3b and 4b, the screw blades 3b and 4b appear to move in the left direction as the rotation shafts 3 and 4 rotate. The moving speed is the same, so that the screw blades 3b and 4b do not collide with each other.
[0030]
If the pitches of the screw blades 3b and 4b are the same, for example, only the left side of the screw blade 3b and the right side of the screw blade 4b are arranged so that only one side of the screw blades 3b and 4b is in contact with each other. Since this is not possible, the powder can only be scraped off from one of the left and right sides of the screw blades 3b, 4b, and cannot be scraped off from both sides.
[0031]
Also, as the rotary shafts 3 and 4 rotate, the rod 3c scrapes off the fly ash kneaded material adhering to the outer peripheral surface of the rotary shaft 4, and the fly ash kneaded material that the rod 4c adheres to the outer peripheral surface of the rotary shaft 3 is removed. Self-cleaning is also performed.
[0032]
According to the kneading apparatus of the present embodiment as described above, when the fly ash kneaded material is kneaded, the powder of fly ash and the like charged from the inlet 1a is moist and the rotary shafts 3 and 4 directly below the inlet 1a are wet. Even if the outer peripheral surfaces of the screw parts 3a and 4a and the screw blades 3b and 4b are sticky, the above-described self-cleaning operation of the screw blades 3b and 4b scrapes off the sticky powder without causing any trouble to the discharge port 1b side. It can be conveyed and the powder and the mixed liquid can be kneaded well and efficiently.
[0033]
【The invention's effect】
As is clear from the above description, according to the kneading apparatus of the present invention, the powder blades and / or the screw blades of the two rotating shafts adhered to the outer peripheral surface of the other rotating shaft and both surfaces of the screw blades. The powder and / or particles are conveyed to the discharge port side while scraping off the particles, and liquid is injected at the discharge port side from the screw blade, and the powder and / or particles and liquid are injected by a plurality of rods. It is conveyed to the discharge port while being kneaded. In that case, the diameters of the screw portions provided with the screw wings of the two rotating shafts are the same, and the two rotating shafts have the tips of the screw wings being the outer periphery of the other rotating shaft. It is arranged so that it is almost in contact with the surface, and the spiral winding method of each screw blade is reversed and the pitch is different, the ratio of the pitch of each screw blade and the reciprocal rotation ratio Reverse direction The diameters of the portions of the two rotating shafts provided with the rods are the same, and the two rotating shafts scrape the kneaded material with each rod adhering to the outer peripheral surface of the other rotating shaft. Since the ratio of the angular pitches in the circumferential direction of the rods of the two rotating shafts is the same as the rotational speed ratio of the rotating shafts, the charged powder and / or grains It is possible to obtain an excellent effect that the body can be conveyed to the discharge port side without hindrance and the powder and / or the granule and the liquid can be kneaded well and efficiently.
[Brief description of the drawings]
FIG. 1 is a plan view showing a state in which most of the upper side of a casing of a kneading apparatus according to an embodiment of the present invention is removed.
FIG. 2 is a side view along one rotation axis in the casing of the kneading apparatus.
FIG. 3 is a cross-sectional view of a main part orthogonal to the axial direction of the rotating shaft of the kneading apparatus.
FIG. 4 is an explanatory diagram of a screw portion of a rotating shaft of the kneading apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Case 1a Inlet 1b Outlet 2 Frame 3, 4 Rotating shaft 3b, 4b Screw blade 3c, 4c Rod 5-8 Bearing 9 Gear box 10 Screw guide 11, 12 Gear 13, 16 Sprocket 14 Motor 15 Cyclo reducer 17 chain

Claims (1)

A kneading apparatus for kneading powder and / or granules and liquid,
A charging port for charging the powder and / or granules above one end in the longitudinal direction, and a kneaded product obtained by kneading the powder and / or granules and liquid below the other end. An elongated casing provided with a discharge port for discharging;
In the casing, it has two rotating shafts that are installed parallel to each other along the longitudinal direction of the casing and are driven to rotate,
In each of the rotating shafts, screw wings formed in a continuous spiral shape with a predetermined pitch along the axial direction of the rotating shaft are provided on the outer peripheral surface of the portion immediately below the inlet, On the outer peripheral surface of the portion on the discharge port side, a plurality of rods are erected so as to be arranged in a spiral shape at a predetermined pitch in the axial direction of the rotating shaft,
At the time of kneading, when the powder and / or granules are introduced into the casing from the inlet, the screw blades of the two rotating shafts that rotate rotate with the outer peripheral surface of the other rotating shaft and the screw blades. The powder and / or the particles adhered to both sides of the powder is scraped off to convey the powder and / or the particles to the discharge port side, and the liquid is injected at the discharge port side portion from the screw blade, The powder and / or particles and liquid are kneaded by a plurality of rods and conveyed to the outlet,
The diameters of the screw portions provided with the screw wings of the two rotating shafts are the same, and the two rotating shafts are such that the tips of the screw wings are in contact with the outer peripheral surface of the mating rotating shaft. The spiral winding method of each screw blade is reversed and the pitch is different, and it is rotationally driven in the reverse direction with the ratio of the screw blade pitch and the reciprocal number of rotations. And
The diameters of the two rotary shafts provided with the rods are the same, and the two rotary shafts scrape the kneaded material adhering to the outer peripheral surface of the other rotary shaft. A kneading apparatus, characterized in that the ratio of the angular pitches of the two rotating shafts in the circumferential direction of each rod to the circumferential direction is the same as the rotational speed ratio of the rotating shafts .

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