Gravity type sludge dehydration device

Abstract

The invention discloses a gravity type sludge dehydration device, which comprises a shell, wherein the upside of the shell is provided with a water inlet pipe while the downside is provided with a drain pipe and a mud pipe, a dehydration device is connected with the inside of the shell from top to bottom and divides the cavity of the shell into a water purifying area and a mixing area, a mixing distribution cylinder having a round cross section and communicated with the water inlet pipe, a first water eliminator, a second water eliminator are arranged from top to bottom in the mixing area, and the mud pipe is communicated with the lower end of the mixing area; a water collection bailer is arranged in the water purifying area, and the drain pipe is communicated with the lower end of the water collection bailer; and the water inlet pipe is communicated with the mixing distribution cylinder, the mixing distribution cylinder is provided with water distribution holes, and the first water eliminator and the second water eliminator are arranged below the mixing distribution cylinder at intervals, tilt downwards and are opposite to the dehydration device. The gravity type sludge dehydration device is free from being driven by power devices, and the dehydration process depends on the gravity flow of water and the osmosis of filter cloth to release the water in the sludge. Besides, the dehydration efficiency of the sludge is high, the liquid holdup of filter cakes is between 80 and 85 percent, and the sludge recovery percent is over 90 percent.

Description

technical field [0001] The invention discloses a water treatment device, in particular to a gravity sludge dewatering device. Background technique [0002] With the development of my country's environmental protection, sludge dewatering machines have been widely used in various sewage treatment sites in the environmental protection industry. The moisture content of sludge is generally between 70% and 85%, which is relatively high compared to its manufacturing cost, operating cost and operating requirements. There are various advantages and disadvantages during operation. The shortcomings are mainly manifested in the following aspects: Plate and frame filter press: pressurized water intake (≥0.5Mpa), filter cloth filter operation, no special requirements for mud content in the water intake, good dehydration effect (the moisture content of sludge is generally 70-75%); However, due to the relatively high water inlet pressure during operation, the filter cloth is easily damaged, a...

AI Technical Summary

Problems solved by technology

At present, half of the commonly used centrifugal sludge dewatering machines in China are imported devices. The project cost is extremely high, and the operation and control process is also very complicated. Although the floor space is relatively small, the cost performance of the device is relatively poor.

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