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An integrated method and system for cement kiln cooperative sludge deep dehydration and sludge disposal

A deep dewatering, cement kiln technology, applied in dewatering/drying/concentrating sludge treatment, temperature-controlled sludge treatment, energy and wastewater treatment, etc. Sludge, cement clinker, etc., to avoid environmental pollution, avoid waste of resources, and realize the effect of resource utilization

Active Publication Date: 2018-09-14
GEZHOUBA ZHONGGU TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has problems such as skinning and blockage of the precalciner of the cement kiln, and does not consider the influence of the excessive amount of dried sludge on the cement clinker.

Method used

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  • An integrated method and system for cement kiln cooperative sludge deep dehydration and sludge disposal
  • An integrated method and system for cement kiln cooperative sludge deep dehydration and sludge disposal
  • An integrated method and system for cement kiln cooperative sludge deep dehydration and sludge disposal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 1. Dehydration pretreatment of sludge:

[0057] 1.1. Dilution and homogenization of raw sludge

[0058] The sludge from a sewage treatment plant A in Wuhan has a water content of 87% and is colloidal. The sludge from this sewage treatment plant A is pumped into the homogenizing mixing tank (effective volume is 150m 3 ), add water, in addition to adding tap water for the first homogenization and stirring, add the tail water produced by the mechanical filter press each time after homogenization and stirring, use a mixer (size Φ900×1545mm, stirring power 8.5kW) to stir and dilute To obtain fluid mud, the mud properties are uniform, and its concentration is 10%, where the concentration is the ratio of the quality of the dry matter in the mud to the total mass of the mud.

[0059] 1.2. Conditioning and modification of mud:

[0060] Pump the mud into each modified mixing tank (the effective volume is 24m 3 ), the dosing device in each modified mixing tank adds a compound c...

Embodiment 2

[0079] 1. Dehydration pretreatment of sludge:

[0080] 1.1. Dilution and homogenization of raw sludge

[0081] The moisture content of the sludge from a sewage treatment plant B in Wuhan City is 84%, and it is colloidal. The sludge from the sewage treatment plant B is pumped into the homogenization mixing tank (effective volume is 150m 3 ), add water, in addition to adding tap water for the first homogenization and stirring, add the tail water produced by the mechanical filter press each time after homogenization and stirring, use a mixer (size Φ900×1545mm, stirring power 8.5kW) to stir and dilute To obtain fluid mud, the mud properties are uniform, and its concentration is 10%.

[0082] 1.2. Conditioning and modification of mud:

[0083] Pump the mud into each modified mixing tank (the effective volume is 24m 3 ), the dosing device in each modified mixing tank adds a compound conditioner to the mud to condition and modify the mud. The compound conditioner is one of acrylam...

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Abstract

The invention discloses a cement kiln / sludge deep dewatering synergic sludge integrated treatment method and system. The method comprises the following steps: 1. sludge dewatering pretreatment: 1.1, dilution and homogenization of raw sludge; 1.2, conditioning modification of sludge; 1.3, mechanical pressure filtration of modified sludge; 2. drying treatment of sludge cake: 2.1, spreading distribution of sludge cake; 2.2, overturning drying of sludge cake; and 3. cement kiln synergic treatment of dried sludge cake. The system comprises a dilution and homogenization unit, a conditioning modification unit, a mechanical pressure filtration unit, a drying treatment unit and a cement kiln treatment unit. All the units perform the functions respectively and interact to constitute a complete reasonable integrated sludge treatment system. According to the method, the feed quantity and feed mode of the dried sludge cake added into the cement kiln are accurately controlled, thereby lowering the influence of the added dried sludge cake on the cement kiln production line, and avoiding the influence on the properties of the cement product. The system is assembled from conventional plants, and thus, is convenient to implement and low in construction cost.

Description

technical field [0001] The invention belongs to the technical field of environmental treatment engineering, and in particular relates to an integrated method and system for cement kiln cooperative sludge deep dehydration and sludge disposal. Background technique [0002] As of September 2015, a total of 3,830 sewage treatment plants have been built in cities and counties across the country, with a sewage treatment capacity of 162 million m 3 Every day, the annual generated sludge (water content 80%) is as high as more than 40 million tons. However, the current sludge treatment and disposal technology is relatively lagging behind, and basically cannot meet the technical requirements of "green, environmental protection, recycling, and low-carbon" sludge disposal. Among them, most of them use landfill technology after dehydration of sludge. This technology has the disadvantage of occupying a large amount of land resources, and the waste gas and waste water produced will cause ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/12C02F11/14C02F11/18
CPCY02W10/37
Inventor 陈伟胡远河洪军
Owner GEZHOUBA ZHONGGU TECH CO LTD
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