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A method for drying and incinerating dewatered sludge

A technology for dewatering sludge and sludge incineration, which is used in dewatering/drying/concentrating sludge treatment, water/sludge/sewage treatment, sludge treatment, etc., and can solve the problem of increasing carbon dioxide emissions, increasing fuel and air consumption, etc. problems, to achieve the effect of lightening load, reducing fuel consumption, and reducing heat

Active Publication Date: 2015-10-07
星河航天科技(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technology in the above literature directly incinerates the sludge with high water content, which greatly increases the consumption of fuel and air, and increases the emission of carbon dioxide

Method used

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  • A method for drying and incinerating dewatered sludge
  • A method for drying and incinerating dewatered sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Embodiment one: if figure 2 It is suitable for drying and incineration treatment of municipal and non-hazardous industrial dewatered sludge.

[0068] The dry sludge incinerator for implementing this method is a fluidized bed incineration hot blast stove 1, including a supporting secondary combustion chamber, dry sludge storage and feeding device, blower, etc.; the sludge spray drying tower 2 for implementing this method is downward Co-current spray drying tower, the top inlet of which is connected to the flue gas outlet of the second combustion chamber on the top of the incinerator through the flue gas pipe; the sludge atomizer 3 implementing this method is an airflow atomizing nozzle, and the dry mud settling chamber 4 is a horizontal type The settling chamber, the secondary dryer 7 is a vibrating fluidized dryer, the activated carbon chamber 9 is an injector for activated carbon powder, the dust collector 10 is a bag filter, and the multi-stage wet spray tower 11 is ...

Embodiment 2

[0080] Example 2: Drying and incineration treatment methods suitable for high oil content dewatered sludge

[0081]The dry sludge incinerator 1 for implementing the method is a horizontal rotary kiln incineration hot blast stove, adopts downstream feeding, and is provided with a flue gas secondary combustion chamber above the air outlet. The incineration hot blast stove includes supporting ignition devices, dry sludge storage and feeding devices, blowers, etc.;

[0082] The spray drying tower 2 for implementing the method is an upward co-current spray drying tower, and its bottom inlet is directly connected with the flue gas outlet at the top of the second combustion chamber of the incinerator 1 . The sludge atomizer 3 that implements this method is an airflow atomization nozzle, the dry mud settling chamber 4 is a horizontal settling chamber, the secondary dryer 7 is a vibrating fluidized dryer, the activated carbon chamber 9 is an activated carbon powder injector, and the du...

Embodiment 3

[0086] Example 3: Mixed drying and incineration treatment methods suitable for dewatered sludge with different moisture content

[0087] The dry sludge incinerator 1 that implements the method is a fluidized bed incineration hot blast stove, including supporting secondary combustion chambers, dry sludge storage and feeding devices, blowers, etc.; the spray drying tower 2 that implements the method is a downward parallel flow Spray drying tower, the top inlet of which is connected to the flue gas outlet of the second combustion chamber on the top of the incinerator through the flue gas pipe; the sludge atomizer 3 for implementing this method is an airflow atomizing nozzle, and the dry mud settling chamber 4 is a horizontal settling chamber , the mixer 5 is a crushing mixer, the secondary dryer 7 is a vibrating fluidized dryer, the activated carbon chamber 9 is an activated carbon powder injector, the dust collector 10 is a bag filter, and the multi-stage wet spray tower 11 inclu...

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Abstract

The invention provides a method for drying and incinerating treatment of dewatered sludge. The method comprises the following steps: inputting high-temperature smoke generated by incinerating dry sludge as a heat source into a spraying drying tower; atomizing the dewatered sludge, mixing the atomized sludge with the high-temperature smoke in a flow combination way in the spraying drying tower, drying to half dryness, and in the meantime, rapidly reducing the temperature of the smoke and adsorbing fly ash; collecting the half-dried sludge after spraying drying, and performing mechanical extruding granulation; further drying the half-dried sludge particles with the afterheat of the smoke after the spraying drying; conveying the dried sludge particles into an incinerator for 3T incineration and discharging residual slags; and performing activated carbon adsorption on the dried tail gas, then feeding the tail gas to a deduster and a multi-stage wet-process spraying tower for purification treatment and discharging the tail gas. The method provided by the invention has the beneficial effects of being capable of realizing the drying and incinerating treatment of the sludge in a complete, efficient, environment-friendly and safe way. The process steps are simplified and the process route is shortened.

Description

technical field [0001] The invention relates to the drying and incineration treatment and disposal technology of dewatered sludge produced by municipal and industrial sewage treatment plants, and is a method for drying and incineration of dewatered sludge. Background technique [0002] The dewatered sludge produced by municipal and industrial sewage treatment plants usually contains high water content, which needs to be moderately dried and then incinerated; during the sludge drying process, in order to prevent the mixed explosion of dust and volatile gases, effective Explosion-proof measures; in order to prevent the production of dioxins and heavy metals in the process of sludge incineration from polluting the environment, it is necessary to strictly implement "3T" incineration, incineration flue gas temperature drop, fly ash capture, and adsorption treatment; in order to prevent dust in the tail gas, Acid gas and volatile gas pollute the air, which needs dust removal, acid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/12F23G7/00
CPCB01D53/02B01D53/145B01D53/1456B01D53/1487F23G7/001C02F11/00C02F11/12C02F11/18C02F2303/06F23G2201/10B01D50/40B01D50/60
Inventor 张宏志张会然
Owner 星河航天科技(天津)有限公司
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