Continuous microfilter with wedge wire screen for sewage treatment
The conveyor belt is connected by a number of movable rings. The movable module is composed of a wedge wire screen, a fixing rib that plays a reinforcing role on the wedge screen, and an annular sleeve that is fixed on both sides of the wedge wire screen.
Every two adjacent movable modules are connected by a ring sleeve connected with a connecting shaft.
The two ends of the connecting shaft coincide with the teeth of the driven wheel and the driving wheel.
A brush for cleaning the conveyor belt and a nozzle for spraying the conveyor belt from top to bottom are arranged above the conveyor belt above the slag hopper.
Through the whole set of mechanisms, the impurities and suspended solids in the water are transported to the slag chute. At the same time, the efficiency of the conveyor belt is thoroughly cleaned, and the production cost is reduced.
The utility model comprises a shell (3) which is internally provided with a conveyor belt.
The conveyor belt is sheathed on the driven wheel (19) and the driving wheel (6) for driving the conveyor belt to run.
The bottom part of the shell forms two grooves of the water outlet channel (11) and the slag collecting bucket (9).
One end of the conveyor belt is immersed below the liquid level of the water outlet tank (11), and the gap between the sidewall of the water outlet tank (11) and the conveyor belt is blocked by the water retaining rubber plate (12).
The other end of the conveyor belt is located above the slag collector (9).
The sewage inlet (1) is located above the liquid level on one side of the water-retaining rubber plate, and a baffle (2) is arranged opposite the sewage inlet (1).
The conveyor belt is connected by a plurality of movable modules (5).
The movable module (5) is composed of a wedge wire rotary drum screen (17), a fixing rib (16) for reinforcing the wedge wire screen (17), and an annular sleeve (18) fixed on both sides of the wedge screen (17).
Each of the two adjacent movable modules (5) is connected by the annular sleeve (18) sheathed on the connecting shaft (13).
The two ends of the connecting shaft (13) coincide with the teeth of the driven wheel (19) and the driving wheel (6).
A brush (7) for cleaning the conveyor belt and a spray nozzle (8) for spraying the conveyor belt from top to bottom are arranged above the conveyor belt above the slag hopper (9).
- The activity module (5) is a straight line or an arc.
- The gap in the wedge wire screen (17) is trapezoidal.
- The brush (7) is a brush (7) driven by a motor (14) and can rotate 360 degrees.
- The brush (7) is installed in the brush sliding port (15) which can make the brush move back and forth in a certain range.
The technology belongs to a solid-liquid separation device in sewage treatment, in particular to a belt filter device for separating mixed liquid containing suspended solids, impurities, etc.
A conveyor belt filter is a circulating filtering system set on certain support, which uses the driving wheel to drive the filter cloth to cycle back and forth, so as to bring the particulate matter in the water from the low to the high, and finally fall into the sewage collection bucket.
At present, the conveyor belt of this kind of belt filter mainly uses filter cloth or paper tape to intercept the suspended solids and impurities in the water on its surface. These suspended solids and impurities are brought to the highest place with the movement of the filter cloth and then fall into the slag hopper. During the filtration process, some particles will be trapped on the filter cloth or paper bag, so it is not easy to clean, resulting in low filtration efficiency and short service life.
The purpose of the technology is to overcome the above shortcomings of the filter belt and cleaning method of the belt filter and to improve the existing similar filter.
The continuous micro filter for sewage treatment provided by the technology mainly filters through the gap in the middle of the regularly arranged wedge wire screen filter.
Because the gap is trapezoidal, when the sewage passes through, the suspended solids and impurity particles in the water are easy to adhere to the inclined edge of the wedge wire filter. After filtering for a period of time, a smaller gap is formed, which can be as small as a few microns to a few microns, reaching the filtering accuracy of microfiltration.
The movable module of sewage treatment continuous microfiltration machine can be made into a straight line or arc. The installation angle of the straight-line movable module is generally 60 ~ 75 degrees, while the arc movable module can be installed from multiple angles. When it is installed vertically, it still has good lifting ability.
As the cleaning device of a continuous microfiltration machine for sewage treatment, the brush is driven by the motor and can rotate 360 degrees.
The brush can also be installed in the sliding mouth of the brush which can make the brush move back and forth in a certain range, so the height can be adjusted up and down to adapt to the height of the module, so as to better brush the surface of the filter module. The sliding opening is provided with a spring to complete the reciprocating motion of the brush.
A nozzle for cleaning water is set behind the brush, and the filtering module brushed by the brush is washed with clean water.
The beneficial effect of the technology is that: through the continuous circular motion of the whole set of mechanisms, the impurity suspended solids in the water are transported to the slag discharge tank, and the conveyor belt is thoroughly cleaned at the same time. It improves work efficiency and reduces production costs. High-temperature steam can be used to clean the oily wastewater.
Wedge wire mesh is made of metal, easy to wash, and brush resistant. The sieve bend screen can be placed vertically, which can not only filter impurities well but also reduce the floor area.