How does a mud scraper work?

The driving device drives the mud scraper to rotate around the center of the sedimentation tank. After the raw water settles in the sedimentation tank, the supernatant is discharged from the overflow weir plate. The sludge settled at the bottom of the tank is slowly driven by the logarithmic spiral curved scraper. The ground flows along the bottom of the pool into the central sludge collecting tank and is discharged through the sludge discharge pipe. At the same time, the scum on the pool surface is concentrated in the area between the scum scraper and the scum baffle. When the working bridge passes through the scum discharge tube floating on the pool surface, the scum discharge tube is pressed under the liquid surface, and the scum passes through The discharge tube is discharged out of the pool.

What types of mud scrapers are there?

Classification: Scrapers mainly include peripheral drive scrapers and central drive concentrated scrapers.

The peripheral drive sludge scraper is a sludge discharge equipment for the sludge treatment system. Components: The scraper is composed of a driving device, a working bridge, a main scraper device, an auxiliary scraper device, a central turntable, a skimming device, an overflow weir plate and a slag retaining plate, and a power collecting device. For the central inlet and peripheral outlet sedimentation tanks, it is generally necessary to set up diversion tubes to achieve better sedimentation and sludge discharge effects.

The central drive thickening sludge scraper mainly consists of an overflow device, girders and bars, inlet pipes, transmission devices, electrical boxes, flow stabilizing cylinders, main shafts, scum rake plates, scraping devices, underwater bearings, small scrapers, and slag hoppers. , scum rake plate and other components. The central drive concentrated sludge scraper can further separate the free moisture in the sludge in the concentration tank to reduce the volume of sludge, increase the sludge concentration, and discharge the concentrated sludge out of the tank.

What are the uses of a mud scraper?

Sludge scrapers are mainly used in large-diameter circular sedimentation tanks in urban sewage treatment plants, water plants and industrial wastewater treatment to remove sludge settled at the bottom of the tank and spread scum on the tank surface.

What’s the composition of the mud scraper?

The mud scraper mainly consists of the following parts:

1. Driving device: The driving device is the core component of the mud scraper. The negative wheat drives the mud scraper to rotate around the center of the sedimentation tank. It usually uses a cycloidal pinwheel reducer to drive the internal gear slewing bearing to rotate, thereby driving other components to operate.
2. Working bridge: The working bridge is the main structure of the mud scraper. It is usually made of carbon steel profiles and carbon steel plates welded into a truss structure. The bridge deck is paved with steel gratings or carbon steel pattern plates. It has high strength, light weight and low energy consumption.
3. Main scraper device: The main scraper device includes a scraper and a truss. The scraper is in the shape of “?” and is symmetrically arranged on the lower edge of the truss in the form of a logarithmic spiral curve, which can effectively scrape the sludge at the bottom of the pool.
4. Auxiliary mud scraper device: The auxiliary mud scraper device is used to enhance the mud scraper effect. It is usually installed in addition to the main mud scraper device, which can further improve the overall performance of the mud scraper.
5. Center turntable: The center turntable is the central component of the mud scraper. It is connected to the output bracket of the driving device through bolts to ensure the stable operation of the mud scraper.
6. Skimming device: The skimming device is used to scrape off scum and foam on the water surface and discharge it out of the pool through the scum discharge tube.
7. Overflow weir plate: The overflow weir plate is used to control the discharge of the supernatant liquid and ensure that the precipitated supernatant liquid can be discharged smoothly.
8. Power collecting device: The power collecting device is used to collect and transmit electrical energy to ensure the normal operation of the mud scraper.
9. Flow adjustment device: The flow adjustment device is used to adjust the mud discharge volume according to actual process requirements to ensure stable operation of the system.

These components work together to enable the sludge scraper to play an important role in sewage treatment, effectively scraping and discharging the sludge and scum at the bottom of the sedimentation tank.

What are the characteristics of a mud scraper?

The main features of the mud scraper include high efficiency, stability, adaptability, safety and reliability as well as corrosion resistance and long service life.

1. Efficient: The sludge scraper can continuously and automatically scrape off sludge, greatly improving the efficiency of sludge treatment.
2. Stable: The mud scraper has reasonable design and stable operation, which can ensure the effective scraping of sludge.
3. Strong adaptability: The mud scraper is suitable for sedimentation tanks of various sizes. Whether it is a small or large sedimentation tank, you can find a suitable mud scraper model.
4. Safe and reliable: The transmission part adopts electrical and mechanical double overload protection to ensure safe and reliable operation. 25. Corrosion resistance and long service life: The underwater parts are made of stainless steel, and the above water parts are made of carbon steel and hot-dip galvanized, which is corrosion-resistant. Good performance and long service life.