Screw squeezing dewaterer

A technology of screw press and dehydrator, which is applied in dehydration/drying/thickened sludge treatment, combustion method, fixed filter element filter, etc. It can solve the problems of long processing cycle and large energy consumption, and achieve low operating power and energy saving De-operation control, simple structure effect

Inactive Publication Date: 2014-10-08
CHENGDU XINZHU ZHUANBO ENVIRONMENTAL PROTECTION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 squeezing dewaterer

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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 squeezing dewaterer. The screw squeezing dewaterer comprises a rack body, a driving unit, a screw column, a sieve drum and screw blades, the driving unit and the sieve drum are fixed on the rack body, the screw column is arranged in the sieve drum, the screw blade is arranged on the screw column, the screw column is connected with the driving unit, one end of the sieve drum is provided with a material inlet, the other end of the sieve drum is provided with a material outlet, the material inlet end of the sieve drum is lower than the material outlet end of the sieve drum, and a screw distance between screw blades gradually reduces from the material inlet end to the material outlet end. The screw squeezing dewaterer can realize continuous dehydration, so matching apparatuses in front of and behind the screw squeezing dewaterer can also realize continuous treatment, thereby complex operation control can be omitted. The rotating speed of the screw squeezing dewaterer is low, so required running power is small, thereby the daily running cost is low. The screw squeezing dewaterer has the advantages of total utilization of sludge, no residual, no emission, and realization of sludge harmlessness and recycling.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a screw press dehydrator. 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 matter between liquid and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D29/11C02F11/12C02F11/10F23G7/00
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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