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Screw pressing dewaterer for sludge dewatering

A technology of screw pressing and sludge dewatering, which is applied in the fields of filtration and separation, fixed filter element filters, chemical instruments and methods, etc. It can solve the problems of long processing cycle and large energy consumption, achieve low operating power and save operation control. , the effect of simple structure

Inactive Publication Date: 2014-10-15
CHENGDU XINZHU ZHUANBO ENVIRONMENTAL PROTECTION TECH
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Problems solved by technology

Or the processing cycle is long, or consumes a lot of energy

Method used

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  • Screw pressing dewaterer for sludge dewatering

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Embodiment Construction

[0034] A method for sludge treatment, comprising the steps of:

[0035] a Adjust the moisture content of the sludge to 60-70%,

[0036] b carry out low-temperature pyrolysis of the sludge obtained in a, and collect the pyrolysis gas,

[0037] c. Heat the pyrolysis residue after the treatment in step b to 1300~1500°C to burn the organic matter in the sludge,

[0038] d Use the residue after combustion as an inorganic additive to make glass or cement.

[0039] The following is a detailed description of each step:

[0040] The sludge from the sewage treatment plant was taken, and its water content was measured to be 97.3%. It was concentrated by a screw press dehydrator, and the water content was adjusted to 60-70%.

[0041] The screw press dehydrator used includes a frame body, a driving device, a screw column, a screen drum, and a screw blade. The drive device and the screen drum are fixed on the frame body, the screw column is arranged in the screen drum, and the screw blad...

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Abstract

The invention discloses a screw pressing dewaterer for sludge dewatering. The dewaterer comprises a frame body, a driving device, a screw column, a screen cylinder and screw blades. The driving device and the screw column are fixed on the frame body. The screw column is arranged in the screen cylinder, the screw blades are arranged on the screw column, which is connected to the driving device. One end of the screen cylinder is provided with a feed inlet, and the other end is provided with a discharge port. The feed inlet end of the screen cylinder is lower than the discharge port end. The screen cylinder inclines by 5-10 degrees, and the inner diameter of the screen cylinder decreases gradually from the feed inlet end to the discharge port end. The screw distance between the screw blades decreases gradually from the feed inlet end to the discharge port end. The screw pressing dewaterer provided by the invention can realize continuous dewatering treatment, and former and latter support equipment also can undergo continuous treatment, thus omitting complicated operation control.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a screw press dehydrator for sludge dewatering. Background technique [0002] Sludge is the product of sewage treatment, which is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids, etc. The main characteristics of sludge are high water content (up to 99%), high content of organic matter, easy to rot and smell, and the particles are finer, the specific gravity is smaller, and it is in a colloidal liquid state. It is a thick substance between liquid and solid, which can be transported by pump, but it is difficult to separate solid and liquid by sedimentation. [0003] Sludge refers to the sediment, particulate matter and floating matter produced when wastewater is treated by physical methods, chemical methods, physical chemical methods and biological methods. Sludge generally refers to thick matte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D29/35B01D29/82
Inventor 陈华王小龙马长华曾世明陈圩净
Owner CHENGDU XINZHU ZHUANBO ENVIRONMENTAL PROTECTION TECH
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