A system and method for drying and high-efficiency co-firing treatment of high-moisture solid waste

A high-moisture, drying technology, used in dewatering/drying/concentrating sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as furnace corrosion damage, affecting combustion stability, etc. Achieve the effects of non-polluting emissions, reducing carbon content in fly ash, and increasing heat transfer temperature difference

Active Publication Date: 2021-04-20
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a fuel with high water content, sludge will inevitably affect the combustion stability and cause certain corrosion damage to the furnace if it is directly sent to the combustion equipment for combustion.

Method used

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  • A system and method for drying and high-efficiency co-firing treatment of high-moisture solid waste

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Embodiment Construction

[0028] The present invention is described in further detail below in conjunction with accompanying drawing:

[0029] see figure 1, a system for high-moisture solid waste drying and high-efficiency co-firing treatment provided by the present invention includes an extrusion dehydration part composed of a sludge inlet 1, an eccentric extrusion dehydration device outlet 2, and an eccentric extrusion dehydration device 3; metal Chain conveyor belt 4, solar preheating drying part composed of Fresnel lens 5; gas dryer inlet 6, gas dryer 7, serrated scraper 8, motor 9, drive shaft 10, dryer gas inlet 11 , dry exhaust gas outlet 12, flue gas dryer sludge outlet 16, flue gas convection heat exchange drying part composed of boiler tail flue exhaust port 24, the exhaust part is selected between the high temperature economizer 25 and the low temperature economizer 26 area; circulating water inlet 13, condensing water return device 14, recycled water and circulating water outlet 15, water ...

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Abstract

The invention discloses a system and method for drying high-moisture solid waste and high-efficiency co-firing treatment. In view of the fact that the moisture content of high-moisture solid waste such as sludge usually exceeds 80% and has a certain calorific value, the present invention proposes a three-stage drying system consisting of extrusion dehydration, solar focused preheating drying and flue gas strong convection drying. The solid waste drying system realizes the cascade utilization of energy in the process of drying sludge. The dried sludge is sent to the power plant boiler for high-efficiency co-combustion. By setting the combustion area reasonably and optimizing the combustion conditions, not only the heat of the sludge is fully utilized, but the harmful substances in the sludge are fully degraded. The system recovers the water in the sludge while treating the sludge, and realizes the harmless treatment of the sludge and the full utilization of energy.

Description

technical field [0001] The invention belongs to the technical field of thermal power generation, and in particular relates to a system and method for drying high-moisture solid waste and high-efficiency co-firing treatment. Background technique [0002] With the development of urbanization in our country, the population of cities and towns has increased sharply, and the amount of urban sewage generated is increasing day by day. Even if the city is equipped with corresponding sewage treatment plants, the huge amount of sludge produced after sewage treatment will pose a huge challenge to environmental protection. Directly dumping or landfilling sludge in sewage treatment plants will cause serious secondary pollution. At the same time, sludge is not only a pollutant, but also a fuel with a certain calorific value. However, as a high-moisture fuel, sludge will inevitably affect the combustion stability and cause certain corrosion damage to the furnace if it is directly sent to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/121C02F11/13B02C18/00B02C18/12
CPCB02C18/0084B02C18/12C02F11/121C02F11/13
Inventor 王长安毛崎森王超伟冯芹芹杜勇博车得福
Owner XI AN JIAOTONG UNIV
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