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Wet sludge drying and incinerating treatment device

A processing device and technology for wet sludge, applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve problems such as heat waste, achieve the effect of reducing consumption, high operation stability and reliability, and improving economy

Active Publication Date: 2013-10-30
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if there is no heat user near the sludge incineration plant area, the hot water or steam generated by the water-cooled heating surface needs to be cooled by the cooling system, resulting in waste of heat

Method used

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  • Wet sludge drying and incinerating treatment device
  • Wet sludge drying and incinerating treatment device
  • Wet sludge drying and incinerating treatment device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] see figure 1 :

[0041] A circulating fluidized bed incinerator is used to incinerate wet sludge with a moisture content of 76% and a calorific value of 3000kcal / kg on a dry basis. After the wet sludge C is dried in the sludge dryer 9, it is incinerated in the furnace 1, and the incineration produces The high-temperature flue gas is cooled by the heat exchanger 5 and the air preheater 6 in the tail flue 4, and the dust is removed by the dust collector 7, and then discharged through the chimney 8.

[0042] The circulating fluidized bed incinerator includes a circulating fluidized bed furnace 1, a separator 2, a feeder 3, a tail flue 4, a dust collector 7, a chimney 8 and an auxiliary system, as well as a fluidized bed sludge dryer 9.

[0043] The furnace 1 is insulated, and the side wall is provided with a secondary tuyere, a feeding port, and a dry sludge inlet.

[0044] The sludge dryer 9 is a fluidized bed type, with a wind cap and an air distribution plate at the ...

Embodiment 2

[0053] see figure 1 :

[0054] A circulating fluidized bed incinerator is used to incinerate wet sludge with a moisture content of 60% and a calorific value of 3000kcal / kg on a dry basis. After the wet sludge C is dried in the sludge dryer 9, it is incinerated in the furnace 1, and the incineration produces The high-temperature flue gas is cooled by the heat exchanger 5 and the air preheater 6 in the tail flue 4, and the dust is removed by the dust collector 7, and then discharged through the chimney 8.

[0055] The circulating fluidized bed incinerator includes a circulating fluidized bed furnace 1, a separator 2, a feeder 3, a tail flue 4, a dust collector 7, a chimney 8 and an auxiliary system, as well as a fluidized bed sludge dryer 9.

[0056] A water-cooled heating surface is provided in the furnace 1, and its side wall is a membrane water-cooled wall, and the lower part of the side wall is provided with a secondary tuyere, a feeding port, and a dry sludge inlet.

[0...

Embodiment 3

[0065] see figure 2 :

[0066] A circulating fluidized bed incinerator is used to incinerate wet sludge with a moisture content of 76% and a calorific value of 3500kcal / kg on a dry basis. After the wet sludge C is dried in the sludge dryer 9, it is incinerated in the furnace 1, and the incineration produces The high-temperature flue gas is cooled by the heat exchanger 5, the air preheater 6 and the waste heat boiler 11 in the tail flue 4, and the dust is removed by the dust collector 7, and then discharged through the chimney 8.

[0067] The circulating fluidized bed incinerator includes a circulating fluidized bed furnace 1, a separator 2, a feeder 3, a tail flue 4, a dust collector 7, a chimney 8 and an auxiliary system, as well as a fluidized bed sludge dryer 9.

[0068] The furnace 1 is insulated, and the lower part of the side wall is provided with a secondary tuyere, a material return port and a dry sludge inlet.

[0069] The sludge dryer 9 is a fluidized bed type, w...

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Abstract

The invention relates to a wet sludge incinerating treatment device and relates to the waste treatment technology. The treatment device comprises a circulating fluidized bed hearth, a separator, a material returning device, a tail flue, a duster, a chimney and a fluidized bed type sludge drier, wherein an exhaust outlet and a wet sludge inlet are arranged at the top of the sludge drier, an air distributing device and a dry sludge outlet are arranged at the bottom of the sludge drier, and a heat release coil filled with a heat transfer medium is arranged inside the sludge drier; an air preheater and a heat exchanger are arranged in the tail flue; the heat exchanger is communicated with the heat release coil in the sludge drier; a secondary air port, a material returning port and a dry sludge inlet are arranged at the lower part of the sidewall of the circulating fluidized bed hearth; and the dry sludge inlet is communicated with the dry sludge outlet of the sludge drier, and the secondary air port is communicated with the exhaust outlet of the sludge drier. By adopting the device provided by the invention, the heat from sludge incineration is recovered as much as possible by a process as simple as possible, the wet sludge is incinerated with low energy consumption, and the gas is simultaneously subjected to deodorization and harmless treatment.

Description

[0001] This application is a divisional application with application number 2008100224996.9 (name of invention: a wet sludge drying and incineration treatment device) technical field [0002] The invention relates to a waste treatment device, in particular to a sludge incineration treatment device. Background technique [0003] Sludge is the solid residue after sewage treatment, and the amount of sludge accounts for about 1‰ of the sewage treatment volume (calculated with a water content of 80%). With the continuous construction of sewage treatment plants, the amount of industrial and domestic sewage treatment in my country is increasing rapidly, and more sludge will be generated. The composition of sludge is very complex. In addition to a large amount of water, it also contains a large amount of organic matter, refractory organic matter, various trace elements, pathogenic microorganisms, parasite eggs, and heavy metals. How to make harmless and resourceful sludge with huge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23G7/06C02F11/12
Inventor 吕清刚高鸣朱建国李诗媛王东宇那永洁贺军矫维红
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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