Sludge drying and burning device with low NOx discharge and drying and burning method

A technology of sludge drying and combustion device, applied in the field of sludge drying with low NOX emission, can solve the problems of high volatile content of dry ash-free base, large emission of greenhouse gas and high moisture content of sludge, so as to reduce the Emissions, suppression of NOX generation, and effects of improving combustion efficiency

Inactive Publication Date: 2014-06-11
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

And direct incineration will produce a lot of air pollution
[0003] Sludge has high moisture content, dry ash-free base has high volatile

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  • Sludge drying and burning device with low NOx discharge and drying and burning method

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention should not be limited thereby.

[0027] figure 1 It is a structural schematic diagram of the sludge combustion device of the present invention. As shown, a low NO X Discharged sludge drying and burning plants, including sludge drying plants and sludge burning plants:

[0028] The sludge drying device includes a silo 1, a hopper 2, a piston feeder 3, a rotary drying furnace 4, a screw feeder 5, a chiller 6, a fan 7, a sludge drying pyrolysis gas pipeline 8, The first flue gas circulation pipe 9, the second flue gas circulation pipe 10 and the circulation fan 11;

[0029] The sludge combustion boiler includes a boiler furnace 17 divided into a dense phase zone 15 and a dilute phase zone 16, a sludge feed port 12, a feed return port 13, a sludge drying pyrolysis gas nozzle 14, a cyclone separator ...

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Abstract

The invention discloses a sludge drying and burning device with a low NOx discharge and a drying and burning method. A rotary drying furnace has a telescopic structure, a material chamber is orderly connected to a hopper, a piston feeder, and a first inlet of the rotary drying furnace through a pipeline; a first outlet arranged in the bottom of the inner cylinder of the rotary drying furnace is connected to a spiral feeder; a second outlet arranged in the inner cylinder of the rotary drying furnace is orderly connected to a chiller, a wind turbine, and a sludge drying and pyrolysis gas jet of a sludge burning device through a sludge drying and pyrolysis gas pipeline; the first inlet of the rotary drying furnace is connected to a first flue gas circulation pipe, the first outlet of the rotary drying furnace is connected to a second flue gas circulation pipe, the other end of the first flue gas circulation pipe is connected to a tail flue of the sludge burning device, and the other end of the second flue gas circulation pipe is connected to a circulation wind turbine and the feedback valve of the sludge burning device. A fuel staged combustion technology and a high temperature flue gas sludge drying technology are organically integrated so as to reduce the NOx discharge during the sludge drying and burning process.

Description

technical field [0001] The invention relates to the fields of solid waste recycling and clean combustion, in particular to a low NO X Discharged sludge drying and burning device and drying and burning method. Background technique [0002] The most common methods of sludge disposal are landfill, composting and incineration. Among them, landfilling and composting need to occupy a large amount of open space, and improper handling can easily cause soil heavy metal pollution and compaction, and pollute underground rivers. As a large agricultural country and the world's factory, China has a relatively low land idle rate, and there is no surplus land for landfill and composting. And direct incineration will produce a lot of air pollution. [0003] Sludge has a high moisture content, a dry ash-free base with high volatile content and low calorific value, so that the thermal efficiency of direct combustion is low and the emission of greenhouse gases is large. The drying of sludge...

Claims

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Application Information

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IPC IPC(8): C02F11/10C10L5/46B01D53/76B01D53/56F23K3/00
CPCY02E50/30Y02C20/10Y02E50/10Y02W10/40
Inventor 金晶张号张传美曾武勇高文静董振高新勇孟磊蒋杰
Owner UNIV OF SHANGHAI FOR SCI & TECH
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