JPS643597Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a belt press type dewatering device that continuously dewaters sludge generated in water treatment such as water and sewage treatment and industrial wastewater treatment.

[Prior Art] Conventionally, there has been a belt press type in which endless filter cloth belts are hung over a plurality of shear rolls and a plurality of rollers in a facing state, and sludge is squeezed between these filter cloth belts for pressurized dewatering. Various types of dehydration devices have been disclosed. Regarding this belt press type dewatering device, one in which a plurality of shearing rolls are further installed following the pressure dehydration section, and one in which a pressure band made of wire mesh, rubber belt, etc. is installed on the shearing roll are also disclosed. . A device equipped with this pressure band is disclosed in Japanese Patent Publication No. 56-15292.

The dewatering apparatus disclosed in Japanese Patent Publication No. 56-15292 will be explained with reference to FIG.

Both the liquid-permeable outer web 31 and the inner web 32 run along a pressurized passage located intermediate between the sludge inlet E to be dewatered and the dewatered sludge outlet F;
Each of them is hung on a guide roll 34 and runs. In the pressurizing passage, sludge is contained between the webs 31 and 32, and the webs 31 and 32 run on a plurality of rolls 33 to apply squeezing pressure and perform first pressurized dewatering. The squeezing pressure applied to the sludge depends on the pressure applied to the web and its magnitude is limited, but this can be done by moving at least one of the guide rolls 34 to keep the tensile force of the web within a certain limit. Can be adjusted. A liquid phase permeable pressure belt 36 is installed along the common path section leading to the pressure rolls 33 and applies increased pressure uniformly and continuously to the sludge between the webs for a significant period of time to remove the sludge. increasing liquid removal. The pressure belt 36 runs while being hung around a roll 33a that guides the web to the front and rear surfaces of the pressure roll 35 and a tension roll 37 that adjusts the pressure applied to the outer web 31. The pressure belt 36 is in contact with the outer web 31 which is in contact with the pressure roll 35 under high pressure over approximately the same length as the length of the webs 31, 32 surrounding the pressure roll 35.

[Problems to be solved by the invention] However, in the above-mentioned conventional belt press type dewatering device, the number of times of shearing is determined by the number of shearing rolls, and the number of times of shearing is determined depending on the properties of the sludge. There was a problem in that it was not possible to achieve sufficient dehydration.

In addition, regarding the belt press type dewatering device equipped with a pressure band as disclosed in the above publication, in order to generate high surface pressure on the pressure band,
The problem was that high tension was required.

The purpose of this invention is to solve the above problems, and the pressure belt is composed of a chain roller band consisting of a plurality of rotatable rollers.
It is possible to generate high surface pressure with low tension, it can be adjusted according to the sludge properties by changing the running direction and speed, and it is possible to increase the number of times the sludge is sheared, making the sludge more efficient. It is an object of the present invention to provide a belt press type dewatering device capable of dehydrating well.

[Means for Solving the Problems] In order to solve the above problems and achieve the above objectives, this invention is configured as follows. That is, in this invention, a pair of endless filter cloth belts are movably hung around a plurality of shearing rolls and a group of guide rollers, so that a portion of each filter cloth belt runs parallel to and facing each other. In a belt press type dewatering device, each of the above-mentioned filter cloth belts is installed, and the sludge can be compressed between these filter cloth belts and shear dewatering can be performed while applying shearing force by a plurality of shear rolls. An endless chain roller band consisting of a plurality of rotatable rollers is hung on a support roller, and the chain roller band is installed so as to press against the filter cloth belt, and the support roller of the chain roller band is One relates to a belt press type dewatering device, which is connected to a driving device to provide a relative speed between the chain roller band and the filter cloth belt. Further, this invention is characterized in that the region where the chain roller band presses the filter cloth belt is a portion where the filter cloth belt is hung over the shearing roll at the final stage.

[Function] Since the belt press type dewatering device according to this invention is constructed as described above, it functions as follows. In other words, the chain roller band is composed of a plurality of rotatable rollers connected in an endless manner, and the chain roller band is pressurized toward the filter cloth belt hung on the final stage shearing roll. This eliminates the need for high tension in the chain roller band to generate high surface pressure. Furthermore, since one of the support rollers that support the chain roller band is configured as a drive roller, the chain roller band can be driven so that a relative speed is generated between the chain roller band and the filter cloth belt. For example, the chain roller band itself can stop, move in the positive or negative direction, and the rollers in contact with the filter cloth belt holding the sludge can rotate in place or move while rotating. Become. The chain roller band can be used differently depending on the properties of the sludge, and conditions can be set to match the properties. That is, the running direction and running speed of the chain roller band can be adjusted so as to increase or decrease the number of times the sludge is sheared depending on the properties of the sludge.
Further, the size of the roller can be formed to an appropriate size. Therefore, by installing this chain roller band, sludge can be dewatered extremely efficiently.

[Example] Hereinafter, an example of the belt press type dewatering apparatus according to this invention will be described in detail with reference to the drawings.

In FIG. 1, a belt press type dewatering device according to this invention is shown. Upper filter cloth belt 1
is hung around a plurality of guide rollers 10 and one tension roller 13 (the mechanism thereof is omitted), and similarly, the lower filter cloth belt 2 is hung around a plurality of guide rollers 10 and one tension roller 13 (the mechanism thereof is omitted). 13 (explanation of its mechanism is omitted). Furthermore, the filter cloth belts 1, 2 are fitted with two shear rolls 5, 6.
It is hung on. A drive device (not shown) is connected to the shearing roll 6, and the filter cloth belt 2 is moved in the direction of arrow A by the shearing roll 6.
The filter cloth belts 1, 2 are configured to be tensioned by respective tension rollers 13.
The pretreated sludge 16 is sent out from the feed box 3. The filter cloth belts 1 and 2 are cleaned by filter cloth cleaning devices 12 installed at appropriate locations on the travel path. A chain roller band 18 is installed in contact with the filter cloth belt 1 running around the outer periphery of the shearing roll 6 installed at the final end. An endless chain roller band 18 is hung around support rollers 8, 8', 8''. A tensioning device (not shown) for the chain roller band 18 is connected to the support roller 8. 8' is connected to a drive device (not shown), and the support roller 8' is connected to a chain roller band 18.
functions as a driving roller that drives the Teeth 9 are formed on the outer periphery of each of the support rollers 8, 8', 8''.The spacing between these teeth 9 is determined by the roller 7.
It is long enough to fit into it. The sludge 16 is dewatered to form a sludge cake 17, which is peeled off from the filter cloth belt 2 by the scraper 11.

In FIG. 2, a portion of the endless chain roller band 18 is illustrated. The chain roller band 18 consists of a plurality of rollers 7 arranged in sequence. The roller 7 is made of a hollow roller such as a porous roller, and is fixedly or rotatably attached to the shaft 15. Roller 7 has a roller diameter of approximately 15 mm to approximately 25 mm.
It is formed in mm. The shaft 15 is rotatably supported by a connecting plate 14, and the connecting plate 14 is continuous and endless. That is, the rollers 7 constituting the chain roller band 18 only need to be individually rotatable, and any attachment or support method may be used. The chain roller band 18 is hung around the support rollers 8, 8', 8'', and the roller 7 is attached to the support rollers 8, 8', 8''.
It is constructed so as to fit between teeth 9 formed on each side 8''.

The belt press type dewatering device according to this invention has the above-mentioned configuration and operates as follows. The pretreated sludge 16 is sent out from the feedbox 3 in the direction of arrow C by the filter cloth belt 2 which is driven in the direction of arrow A. Sludge 16
is sent out by the filter cloth belt 2, where it is
First, it is dehydrated by gravity, and then fed between the filter cloth belt 1. The sludge 16 moves between the pressure rolls 4 and is further dehydrated under pressure. The sludge 16 is moved to the shear roll 5 while being held between the filter cloth belt 1 and the filter cloth belt 2. The function of the shearing rolls 5 causes the sludge 16 to be sheared and dewatered. Finally, the sludge 16 is moved to the shear roll 6 while being sandwiched between the filter cloth belt 1 and the filter cloth belt 2. A part of the outer periphery of the shearing roll 6 is surrounded by a chain roller band 18, and the shearing roll 6 and the chain roller band 18 are bent.
A chain roller band 18 presses the sludge 16 held between the filter cloth belts 1 and 2 moving between the filter cloth belts 1 and 2. Here, the sludge 16 is strongly sheared and dehydrated to be completely dehydrated. The dewatered sludge is moved in the direction of arrow D and peeled off from the filter cloth belt 2 by the scraper 11, and is turned into a sludge cake 17 and sent to an appropriate location by a belt conveyor or the like.

The tension of the chain roller band 18 is adjusted by a support roller 8 connected to a tensioning device, and the tension of the filter cloth belts 1 and 2 is adjusted by a tension roller 13. The running direction and running speed of the chain roller band 18 are adjusted by a support roller 8' connected to a drive device.
Further, the filter cloth belt 1 or 2 is moved in the directions of arrows A and B with the traveling speed thereof being adjusted by a shearing roll 5 or 6 connected to a drive device. Since such a drive device is configured to be individually mounted, the chain roller band 18 and the filter cloth belts 1, 2 can be adjusted to different running speeds, and therefore ,
They can be actuated to impart relative velocities to each other. Further, in the chain roller band 18, a plurality of rollers 7 are sequentially arranged, and each roller 7 is connected to a support roller 8,
8', 8'', and since a driving device is connected to the support roller 8', the chain roller band 18 is reliably moved between the teeth 9. Therefore, the chain roller band 18 does not meander.Furthermore, the chain roller band 18 can be moved in the same direction as the running direction B of the filter cloth belt 1, or in the same direction as the running direction B of the filter cloth belt 1. The chain roller band 18 can also be driven in the opposite direction.Furthermore, the drive device for the support roller 8' can be stopped to make the chain roller band 18 stand still.The rollers 7 constituting the chain roller band 18 are each Since they are individually and independently rotatably attached to the connecting plate 14, even if the chain roller band 18 moves in the opposite direction to the filter cloth belt 1, the filter cloth belt 1
The filter cloth belts 1 and 2 and the sludge 16 between them can be smoothly advanced without damaging the belts. Therefore, these traveling directions of the chain roller band 18 can be appropriately selected depending on the dewatering state of the sludge, the properties of the sludge, and the like. The diameter of the rollers 7 of the chain roller band 18 is small, about 15 mm to about 25 mm, and the sludge 16 sandwiched between the filter cloth belt 1 and the filter cloth belt 2 depends on the number of rollers 7. It is also possible to increase the number of times of shearing.

[Effects of the invention] Since the belt press type dewatering device according to this invention is configured as described above, it can exhibit various excellent effects as described below. In other words, the chain roller band installed on the final stage shear roll can be moved forward or backward or stopped, and the relative speed relative to the filter cloth belt can be selected in a variety of ways. Effective shear dehydration is possible. Moreover, the rollers of the chain roller band are individually rotatably attached, and move while rotating while contacting the filter cloth surface of the filter cloth belt, and each roller acts independently against the sludge sandwiched between the filter cloths. Pressure and shear force can be effectively applied. In addition, the roller diameter can be made smaller, and high surface pressure can be generated against the filter cloth even though the tension is low, and the shearing frequency can be adjusted depending on the properties of the sludge by moving the chain roller band. The amount can be increased accordingly, and the sludge held between the filter cloth belts can be effectively dehydrated. In addition, various extremely effective effects can be achieved, such as being able to adjust the running speed of the chain roller band depending on the properties of the sludge.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram schematically showing an embodiment of the belt press type dewatering device according to this invention, FIG. 2 is a partial sectional view showing a part of the structure of the chain roller band in FIG. 1, and FIG. 1 is an explanatory diagram schematically showing a conventional belt press type dewatering device. 1, 2... Filter cloth belt, 3... Feed box, 4... Pressure roll, 5, 6... Shear roll,
7...Roller, 8, 8', 8''...Support roller, 9
... Teeth, 10 ... Guide roller, 11 ... Scraper, 12 ... Cleaning device, 13 ... Tension roller,
14... Connecting plate, 15... Shaft, 16... Sludge, 1
7...Sludge cake, 18...Chain roller band.

Claims (1)

[Claims for Utility Model Registration] (1) A pair of endless filter cloth belts are movably hung around a plurality of shearing rolls and a plurality of rollers,
A belt press type dewatering device in which parts of each of the filter cloth belts are installed so as to run parallel to each other, and the sludge is squeezed between the filter cloth belts for dewatering, wherein a plurality of individually rotatable belts are provided. An endless chain roller band consisting of rollers is hung on a support roller, and the chain roller band is installed so as to press against the filter cloth belt, and one of the support rollers of the chain roller band is connected to a drive device. A belt press type dewatering device, characterized in that the chain roller band and the filter cloth belt are connected to each other to provide a relative speed between the chain roller band and the filter cloth belt. (2) The area where the chain roller band presses the filter cloth belt is a portion where the filter cloth belt is hung over the shearing roll at the final stage. The belt press type dewatering device described.