JPH0123677Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a belt press type sludge dewatering machine, and more specifically to this type of dewatering machine that performs high-pressure dewatering using a high-pressure roller mechanism equipped with a pressure band. Regarding.

[Prior Art] In the high pressure roller mechanism of a conventional belt press type sludge dewatering machine, a pressure band is used to further press both filter belts that are in contact with the rollers against the rollers. The pressure band is operative by actuation of tension rollers connected to a drive member.

[Problems to be solved by the invention] In the conventional high-pressure roller mechanism described above, when a plurality of such mechanisms are provided, a dedicated drive member is required for each mechanism. There was a problem that a large number of them had to be provided.

Further, the reaction force generated by the tension roller due to the operation of the drive member must be received by the frame that supports the drive member, and therefore there is a problem in that the frame must be made strong.

The present invention takes the above-mentioned conventional facts into account, and provides a belt press type sludge dewatering machine that is capable of reducing the number of drive members and has a high pressure roller mechanism that eliminates the need for a strong support frame for the drive members. The purpose is to

[Means for Solving the Problems] In order to achieve the above object, the present invention includes at least one pair of high pressure roller mechanisms, and a pressure band applied independently to each main roller of both mechanisms. The tension roller was arranged so that the tension roller of the other high pressure roller mechanism and its band tension direction were opposite to each other, and the telescopic pressure drive member was arranged between the pair of tension rollers. The primary and secondary sides of the extensible portion of the drive member were connected to the tension roller via rods, respectively.

[Function] In the belt press type sludge dehydrator according to the present invention with the above configuration, if each tension roller is actuated by the expansion and contraction of the drive member, the pressure band of both high pressure roller mechanisms can function. do. In addition, reaction forces generated from both tension rollers due to the operation of the driving member act on the driving member from both directions and are canceled out in the driving member.

[Example] Fig. 1 is a schematic diagram showing an embodiment of the sludge dehydrator according to the present invention, and Fig. 2 is a detailed diagram of the high pressure roller mechanism.

The belt for pinching and dewatering sludge consists of first and second endless filter belts 10 and 20. After the first filter belt 10 passes through the dewatering section from the roller 12, it passes through the rollers 14 and 16 and returns to its original position. After the second filter belt 20 passes through the dewatering section from the roller 22, the second filter belt 20 passes through the roller 24,
It returns to its original position via rollers 26. Both belts 1
0 and 20 are the first rollers 3 of the roller group 30 in the dewatering section
The sludge polymerized at the position where it wraps around belt 2 and placed on belt 10 is sandwiched between both belts 10 and 20. The roller group 30 includes six rollers 32, 34, 3
6, 38, 40, 42, both belts 10,
20 passes through this space while being wound in a zigzag manner. Each of the rollers 32 to 42 has a smaller diameter toward the downstream side, and the dewatering pressure applied to both belts 10, 20 becomes stronger toward the downstream side. The dewatering pressure P1 at each roller 32 to 42 is determined by the formula P1=T1/r1. Here, T1 indicates the tension of both belts 10 and 20, and r1 indicates the radius of the roller.

Both belts 10 and 20 have passed through the roller group 30
Further, the first and second high pressure roller mechanisms 5
0 and 60 in a zigzag manner as in the roller group 30, after which it is separated and the dewatered sludge is discharged, and returns to the original position as described above. Double high pressure roller mechanism 5
0 and 60 consist of main rollers 52 and 62 around which both belts 10 and 20 are wound, and pressure bands 54 and 64 which press both belts 10 and 20 against the main rollers 52 and 62. The pressure bands 54, 64 are wound between a pair of fixed rollers 56-56, 66-66 and movable tension rollers 58, 68, and the pressure bands 54, 64 are wound between a pair of fixed rollers 56-56, 66-66 and a movable tension roller 58, 68. 52,6
It is in contact with the semicircular part of 2.

Further, a piston cylinder 70, which is a telescoping pressure driving member, is arranged in the middle of the straight line connecting the tension rollers 58 and 68. piston cylinder 70
On the primary side of the cylinder 72, there is a first rod 7.
4 is attached, which is the first high pressure roller mechanism 5
0 tension roller 58. Also, the secondary side of the piston cylinder 70, that is, the piston 76
A second rod 78 is attached to the tension roller 68 of the second high pressure roller mechanism 60. Therefore, if a hydraulic or pneumatic pressurized medium is supplied from the supply port 80 into the cylinder 72 to extend the piston cylinder 70, the tension rollers 58 and 68 move outward in the figure, By increasing the tension of the pressure bands 54, 64,
The pressurizing action will function.

The flow of sludge in the belt press type sludge dewatering machine having the above configuration is as follows.

First, the sludge is mixed with a flocculant and stirred, placed on the first filter belt 10, and dewatered by gravity under its own weight. Next, as described above, it is sandwiched between the first and second filter belts 10 and 20, and as it passes through the roller group 30, it is dehydrated under relatively low pressure. Further, when passing through both high pressure roller mechanisms 50 and 60, high pressure dewatering is performed with the assistance of pressure belts 54 and 64, and when both filter belts 10 and 20 are separated, the dewatering cake is transferred to the dehydrator. is discharged from.

FIG. 3 is a detailed view showing the high pressure roller mechanism 50, 60 in which the way the filter belts 10, 20 and the pressure bands 52, 62 are applied has been changed, and is a part that performs the same function as each part shown in FIG. 2. are given the same symbol. In this embodiment, the first and second high pressure roller mechanisms 50, 60 are located in opposite positions to that in FIG.
2, but also passes through both mechanisms 50, 60 in a zigzag manner so as to wrap around one of the fixed rollers 56, 66 for the pressure bands 54, 64. Further, the tension rollers 58 and 68 of the pressure bands 54 and 64 are arranged centrally with respect to each other, that is, adjacent to the piston cylinder 70. First and second rods 74 and 78 extend from the piston cylinder 70 as in the embodiment shown in FIG. 2, but since the positions of both mechanisms 50 and 60 are reversed, the first rod 74 The second rod 7 is attached to the piston 76 of
8 is attached to the cylinder 72, and so on.
The configuration is opposite to that of the embodiment shown in FIG. However, the operation and function of this embodiment is substantially similar to the embodiment illustrated in FIG.

In each of the above embodiments, the diameters of the main rollers of both high pressure rollers are shown to be the same.
By reducing the diameter of the main roller in the latter stage, a higher high-pressure dewatering effect can be obtained. The dewatering pressure P2 at this time is determined by the formula P2=(T1+T2)/r2. Here T1 is both belts 1
The tension is 0.20, T2 is the tension of the pressure band, and r2 is the radius of the roller.

[Effects of the invention] As explained above, the belt press type dehydrator according to the invention has a telescoping pressure drive member disposed between each tension roller of the pressure band of the high pressure roller mechanism, and The primary side and the secondary side of the elastic part of the member are respectively connected to the tension rollers via rods, and the respective tension rollers are actuated by the expansion and contraction of the drive member, and the pressure band of the high pressure roller mechanism is activated. Since the pressurizing action of 2 is made to function, it is sufficient to provide one driving member for the two high pressure roller mechanisms, so the number of driving members can be reduced. In addition, since the reaction force generated from both tension rollers is canceled out in the drive member, there is no need for a strong frame to support the drive member, and the same force is applied to each pressure band, and only one pressure band No uneven tensile force is generated due to the application of abnormal pressure. Furthermore, since it uses a pair of high pressure roller mechanisms, it is possible to apply the pressure belts alternately, and since the inside and outside of the filter belt are reversed, effective dehydration can be achieved even with the same pressure force. It also has advantages.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing one embodiment of the sludge dewatering machine according to the present invention, Fig. 2 is a detailed view of its high pressure roller mechanism, and Fig. 3 is another embodiment of the high pressure roller mechanism. FIG. 10, 20...filter belt, 12, 14,
16, 22, 24, 26...roller, 30...roller group, 32, 34, 36, 38, 40, 42...
... Roller, 50, 60 ... High pressure roller mechanism, 5
2, 62... Main roller, 54, 64... Pressure band, 56, 66... Fixed roller, 58, 68...
Tension roller, 70...Piston cylinder, 72...
... Cylinder, 74, 78 ... Rod, 76 ... Piston, 80 ... Supply port.

Claims (1)

[Scope of utility model registration request] A high pressure roller that pinches and pressurizes sludge between two endless filter belts that run between a plurality of rollers, dewaters the sludge, and is equipped with a pressure band that presses both filter belts against the main roller. In a belt press type sludge dewatering machine that performs high-pressure dewatering of the sludge using a mechanism, at least one pair of the above-mentioned high-pressure roller mechanisms is provided, and a tension roller of a pressure band applied independently to each main roller of both mechanisms is attached to the other roller. The tension roller of the high pressure roller mechanism and its band tensioning direction are arranged so as to be opposite to each other, and a telescoping pressure drive member is arranged between the pair of tension rollers, and the primary part of the elastic part of the drive member is A belt press type sludge dewatering machine characterized in that a side and a secondary side are respectively connected to the above-mentioned double-sided rollers via rods.