JPS6221563B2 - - Google Patents

Description

Detailed Description of the Invention The present invention uses a continuous automatic dehydrator for sludge, etc. obtained by coagulation and precipitation in wastewater and sewage treatment, by continuously performing dehydration, cake removal, and filter cloth washing, thereby reducing the water content of sludge. This invention relates to an improvement of a continuous automatic dewatering machine that enables the rate to be reduced.
Currently, the treatment of wastewater or sewage is particularly important for pollution prevention, but efficient dewatering of sludge, etc. will shorten treatment time and reduce costs, so such a dewatering machine is desired. ing.

In order to meet the above-mentioned demands, the present invention increases the dewatering rate by vacuum dewatering sludge etc. on a filter cloth, and also improves the dewatering efficiency due to filter cloth clogging by effectively cleaning the filter cloth. The purpose is to provide a continuous automatic dewatering machine that prevents dehydration, and includes a filter cloth ring that rotates between a drive roll and a support roll, and a filter cloth ring that is sandwiched between rectangular upper and lower frames. The upper frame of the continuous automatic dewatering machine, which is composed of a drum and a press drum that rotates in pressure contact with the upper surface of the filter cloth ring, is manually suspended from the lower frame with appropriate hanging bodies. A suction tube with suction ports placed in close contact with each other is provided so as to cover the entire width of the lower surface of the filter cloth ring, and the suction tube is connected to a vacuum pump via a separator.
This is a continuous automatic dehydrator designed to increase dehydration efficiency.

Embodiments of the present invention will be described below with reference to the drawings. The continuous automatic dehydrator according to the present invention has a frame 1
It is wound around a support roll 2 and a drive roll 3, which are horizontally mounted on the rear end (the right side is the rear side and the left side is the front side in Figure 1) and the front end, respectively, and is run counterclockwise by a motor 4. The filter cloth T of the filter cloth ring zone and the filter section F, which has rectangular upper and lower frames 5 and 5' sandwiched from above and below in the forward travel of the upper side of the filter cloth T, are pressed against the upper surface of the filter cloth T and rotated by friction. It consists of a pressing drum D and a cleaning device W provided on the return stroke of the filter cloth T.
The filtration unit F is constructed by suspending an upper frame 5 consisting of only rectangular side plates on the upper frame 1a so as to face the lower frame 5' in the form of a rectangular open box placed on the frame 1. , 5', a liner 6 made of synthetic resin or the like is fixed to the end face of the side frame and comes into contact with the T-side of the filter cloth, and a sheet 7 made of an elastic material such as synthetic resin is attached to the front surface of the upper frame 5 and its pressure is adjusted. A plate 8 is attached,
The sheet 7 contacts the upper surface of the filter cloth T with the contact pressure adjusted,
To prevent leakage of floating water and to limit the thickness of sludge, etc. A liner 6 made of synthetic resin or the like similar to the side part is fixed to the front end face of the lower frame 5'.
It is designed to be in contact with the lower surface of the filter cloth T. A screw shaft 9 is pivotally attached to the center of the front and rear rib portions 5a provided in the upper surface width direction of the upper frame 5, and the screw shaft 9 is slidable in a vertical guide hole of a support member 10 fixed to the upper frame 1a. The bushing 12 is fitted into the lower end of the support member 10 so as to be rotatable at the upper end flange 11. circular handle 1
3, the bush 12 is rotated, the screw shaft 9 slides up and down, the upper frame 5 is raised and lowered, and the contact pressure on the filter cloth T between it and the lower frame 5' is adjusted. It is composed of 14 is the support member 1
This is a pin for preventing rotation of the screw shaft 9 that projects from the side surface of the screw shaft 9 into an axial notch 10a carved on the outer periphery of the screw shaft 9. 15 is a lock nut fitted to the upper end of the screw shaft 9;
This is to prevent the screw shaft 9 from moving after adjusting the contact pressure to the filter cloth T between the holes 5' and 5'. Also, the upper frame 5 and the screw shaft 9
The upper frame 5 is pivoted so that it can swing left and right through a pin 16, and the right and left contact pressures on the filter cloth T between the upper and lower frames 5 and 5' are automatically balanced. A plurality of horizontal rods 18 are mounted on the upper surface of the lower frame 5' in a manner perpendicular to the direction in which the filter cloth T travels to support the lower surface of the filter cloth T, and the acute angle portions 18' of the horizontal rods 18 support the filter cloth T. Scrape off any moisture that has seeped out from the back side of the At the center of the lower frame 5', a suction tube 19 is installed in parallel with the crossbar 18, extending over the entire width of the lower frame 5', with a suction port 19a bored in its upper surface closely contacting the lower surface of the filter cloth T. , the lower frame 1b via the pipe 20
It communicates with a separator 21 placed above, and further communicates with a vacuum pump 23 via a pipe 22, which sucks moisture from sludge, sludge, etc. on the filter cloth T through the filter cloth T, and removes water and water through the separator 21. The air is separated and the separated water is returned through a pipe or the like (not shown) for reuse. 2
Reference numeral 4 denotes a sludge or the like input port opened at the rear end of the upper frame 5, through which sludge or the like is inputted into the frame 5 via a pipe 25 from a mud storage tank (not shown) or the like. 2
Reference numeral 6 indicates a discharge port for water in the lower frame 5' that has passed through the filter cloth T and is returned to the water via a pipe or the like for reuse. The press drum D is pivoted to two arms 27 that are pivotally supported on the frame 1, and the press drum D is attached to the arms 27.
A scraper 28 is attached to the surface of the filter cloth T for stripping cake transferred from the filter cloth T, and a conveyor 29 for discharging the stripped cake is disposed below the scraper 28. W is a cleaning device installed on the return journey of the filter cloth T. In a water tank 30 installed on the frame 1, a polygonal cage-shaped roll 32 composed of rods 31 connected at intervals is used to wash the filter cloth T. The return path of the filter cloth T is carried out by a guide roll 33 which is rotatably mounted on an axis in the width direction, and is provided at the upper entrance of the water tank 30, the cage-shaped roll 32, and a pair of squeezing rolls 34 arranged oppositely above the water tank 30. The pump 3 is configured with a water whistle type ultrasonic oscillation nozzle 35 and 36 that are open to both sides of the filter cloth T in the water tank 30.
7, water is sprayed onto the filter cloth T surface through the pipe 38 to wash both sides of the filter cloth T. In particular, the nozzle 35 disposed on the back side of the filter cloth T is brought into close contact with the filter cloth surface and water is sprayed vertically. Particulates that have penetrated into the structure of the filter cloth T are pushed out together with water, and the nozzle 3
6 is designed to spray on the surface of the filter cloth in the form of a tangential line to clean the surface. It is best to use a felt filter cloth T made of natural or synthetic fibers.

The continuous automatic dehydrator according to the present invention feeds sludge and the like from the sludge storage tank onto the filter cloth T through the pipe 25 from the input port 24 of the filtration section F. Since the filter section F runs the filter cloth T between the upper and lower frames 5 and 5', it is necessary to sufficiently adjust the contact pressure between the upper frame 5, the filter cloth T, and the lower frame 5'. In other words, if the contact pressure is too large, the filter cloth T will receive a large resistance between the upper and lower frames 5 and 5', which will not only shorten the life of the filter cloth T, but also waste power. Sludge and water overflow from between the liner 6 and the filter cloth T around the upper frame, polluting the machine base. For this adjustment, the contact pressure between the upper frame 5, the filter cloth T, and the lower frame 5' can be easily finely adjusted by turning the handle 13 to raise or lower the screw shaft 9. The sludge and the like on the filter cloth T is dewatered through the filter cloth, and is further vacuum dehydrated through the filter cloth T by the suction cylinder 19 in the lower frame 5', thereby improving the dehydration rate. Further, depending on the nature of the sludge, suction cylinders 19 may be arranged at several locations to repeat vacuum dehydration. The sludge, which has been mostly filtered and dehydrated in this way, becomes a cake and reaches the pressing drum D.
It transfers onto the pressing drum D, is scraped off by the scraper 28, and is discharged by the conveyor 29. The filter cloth T is washed by a fountain from the back side by a nozzle 35 in the lower washing device W, and even if microparticles such as sludge enter the inside of the filter cloth T by vacuum filtration and dehydration, they are pushed out and cleaned by a fountain from the nozzle 36. The filter cloth T returns to the filtration section F without deteriorating its filtration ability.

As described above, the continuous automatic dewatering machine according to the present invention consists of a circulating filter cloth ring, a filtration section, and a pressing drum, and sludge, etc. placed on the filter cloth ring is dehydrated and transferred by the pressing drum. In a continuous automatic dehydrator designed to discharge water, the upper frame of the filtration section is manually suspended from the lower frame using appropriate hanging bodies, making it extremely easy to fine-tune the contact pressure between the two using the handle. be able to. Therefore, the filter cloth will not be damaged. In addition, a suction cylinder is provided in the lower frame with suction ports suitably close together so as to cover the entire width of the lower frame on the lower surface of the filter cloth ring, and the suction cylinder is connected to a vacuum pump via a separator to perform suction. Therefore, the dewatering rate of sludge can be improved. Therefore, the operating area of the filtration section can be reduced, the overall length of the dehydrator can be shortened, and the dehydrator can be provided at low cost, and the installation area can also be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the continuous automatic dehydrator according to the present invention, in which Fig. 1 is a front view showing the main parts, Fig. 2 is a sectional view of the filtration section, and Fig. 3 is a sectional view taken along the line be. 1... Frame, 2... Support roll, 3... Drive roll, 5... Upper frame, 5'... Lower frame, 6...
...Liner, 9...Screw shaft, 13...Handle, 1
9... Suction tube, 19a... Suction port, 21... Separator, 23... Vacuum pump, 35, 36...
Water whistle type ultrasonic oscillation nozzle, T...filter cloth, F...filtering section, D...pressing drum, W...cleaning device.

Claims (1)

[Claims] 1 Consists of a filter cloth ring that rotates between a drive roll and a support roll, a filtration section in which the filter cloth ring is sandwiched between rectangular upper and lower frames, and a press drum that rotates and presses against the upper surface of the filter cloth ring. In a continuous automatic dehydrator, the upper frame is manually suspended from the lower frame using a hanging body, and a suction port is appropriately placed in close contact with the lower surface of the filter cloth ring so as to cover the entire width of the lower frame. Install a suction tube,
A continuous automatic dehydrator characterized in that the suction cylinder is connected to a vacuum pump via a separator.