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Sludge drying incineration processing system utilizing system residual heat

A technology of sludge drying and sludge incineration, applied in dehydration/drying/concentrated sludge treatment, incinerators, combustion methods, etc., can solve problems such as prone to reaction, easy to corrode equipment, and reduced system economy, and achieve Improve energy utilization efficiency, improve system economy, and reduce heat consumption

Active Publication Date: 2010-05-19
BEIJING BOOTES ELECTRIC POWER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the sludge in this system is not fully dehydrated and dried, it is directly sent to the fluidized bed incinerator for incineration, and auxiliary fuel must be used to support the combustion, which reduces the economical efficiency of the system
In addition, the waste residue and waste gas generated during the incineration process are prone to react with moisture, producing more harmful substances, which are highly corrosive and easy to corrode equipment

Method used

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  • Sludge drying incineration processing system utilizing system residual heat
  • Sludge drying incineration processing system utilizing system residual heat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: The sludge semi-drying device adopts a fluidized bed dryer

[0031]The semi-drying process is carried out in the bubbling fluidized bed. The flue gas enters the bed from the bottom of the bed through the hood, and the sludge, bottom slag and fly ash are sent in from different feeding ports. On the one hand, the hot flue gas makes the bed The sludge is fluidized to prevent the sludge from sticking; on the other hand, it also fully exchanges heat with the sludge to evaporate the water in it, and the evaporated water is mixed with the flue gas, which is also conducive to reducing the dust content in the flue gas. Reduce load on e.g. baghouses. At the same time, the use of this system also helps to prevent the odor from overflowing during the drying process and reduce pollution. The odor and flue gas enter the tail flue gas treatment system together and are discharged after treatment. When the waste heat of the bottom slag and flue gas is not enough to provide t...

Embodiment 2

[0032] Example 2: The sludge semi-drying device adopts a drum structure

[0033] Bottom slag and sludge enter together from the top of the drum, and the two are slowly mixed in the drum to fully exchange heat and semi-dry the sludge. At the same time, the above-mentioned flue gas is introduced from the bottom of the drum, and the flue gas flows upstream, collects from the outlet on the top of the drum, and then enters the bag filter, which can effectively use the waste heat, thereby greatly improving the energy utilization efficiency of the system. Heat exchange tubes are arranged in the drum, and the number of arrangement depends on the actual situation. When the waste heat of the bottom slag and flue gas is not enough to provide the heat required for the semi-drying of the sludge, the steam from the waste heat boiler can be passed through the exchange tube set in the drum. Heat pipes dry the sludge.

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Abstract

The invention relates to a sludge drying incineration system utilizing system residual heat, comprising a sludge semidrying device, a sludge incineration device and a smoke residual heat utilizing device, wherein the sludge semidrying device is provided with a sludge receiving part and a discharge part; the sludge incineration device is provided with a semidrying sludge receiving part, a bottom slag discharge part and a smoke discharge part; the smoke residual heat utilizing device is provided with a smoke receiving part and a smoke discharge part; the discharge part of the sludge semidrying device is connected with the semidrying sludge receiving part of the sludge incineration device; and the smoke discharge part of the sludge incineration device is connected with the smoke receiving part of the smoke residual heat utilizing device. The sludge drying incineration system utilizing system residual heat is characterized in that the sludge semidrying device is also provided with a bottom slag receiving part and a smoke receiving part, wherein the bottom slag receiving part of the sludge semidrying device is connected with the bottom slag discharge part of the sludge incineration device, and the smoke receiving part of the sludge semidrying device is connected with the smoke discharge part of the smoke residual heat utilizing device.

Description

technical field [0001] The invention relates to a sludge drying and incineration treatment system, in particular to a sludge drying and incineration treatment system which fully utilizes the waste heat of the system. Background technique [0002] With the continuous acceleration of my country's urbanization process, the discharge of industrial and domestic sewage is increasing, and the amount of sludge, a by-product of sewage treatment, is also increasing. Sludge is a kind of flocculent mud particles with high moisture content, which contains a large amount of organic matter, heavy metals, germs and pathogenic bacteria, etc. If it is not handled properly, it will cause serious pollution to the environment. Commonly used sludge treatment technologies include landfill, composting, and incineration. The incineration method can greatly reduce the volume of sludge, and has the advantages of fast processing speed, harmlessness, and high degree of reduction. The incineration proce...

Claims

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Application Information

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IPC IPC(8): C02F11/12F23G7/00
Inventor 马志刚吴树志李永旺张明崔一尘
Owner BEIJING BOOTES ELECTRIC POWER SCI & TECH
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