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Incineration treatment method of municipal sludge and device thereof

A technology for urban sludge and treatment methods, which is applied in combustion methods, incinerators, combustion types, etc., can solve the problems of large energy consumption and complex process, achieve continuous and reliable operation, simple process flow, and eliminate the need for sludge collection. Effect

Inactive Publication Date: 2009-10-07
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the disadvantages of complex process and large energy consumption in the sludge drying process in the conventional sludge incineration method, the present invention provides a municipal sludge incineration treatment method and its device, which can greatly reduce pulping and operating costs , Fully recover the calorific value of sludge, realize low pollution emission of flue gas and comprehensive utilization of ash

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  • Incineration treatment method of municipal sludge and device thereof
  • Incineration treatment method of municipal sludge and device thereof
  • Incineration treatment method of municipal sludge and device thereof

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] figure 1 Process flow chart for slurrying, combustion and heat recovery of sludge coal-water slurry. Coal powder, sludge and water are mixed and stirred and then pumped to the combustion chamber for combustion. The high-temperature flue gas passes through the waste heat boiler to recover heat, and then is discharged into the atmosphere after passing through the bag filter, and the ash is directly discharged from the lower part of the combustion chamber.

[0021] The specific method of starting the combustion system is as follows:

[0022] When the combustion system starts, gas and air are sent into the ignition gun 2-2 located at the top of the combustion chamber 9 to mix earlier, and then sent into the combustion chamber 2-3 to ignite. When the temperature in the chamber 2-3 of the combustion chamber reaches 850°C, start to send the sludge coal-water slurry...

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Abstract

The invention relates to an incineration treatment method of municipal sludge and a device thereof. The method comprises the steps of directly mixing powdered coal with average particle diameter of 75 to 90 micrometers, municipal sludge with water content of 95 wt percent and water according to the mass ratio of 60:25:15, then stirring for two times and filtering to manufacture finished sludge water-coal-slurry, directly adopting a screw pump for pressurizing, feeding the sludge water-coal-slurry into a sludge water-coal-slurry atomizing nozzle, and simultaneously feeding compressed air and primary air into the atomizing nozzle to ensure that the sludge water-coal-slurry is injected into a combustion chamber in a good spray pattern. Generated high-temperature flue gas is discharged into atmosphere after heat is recycled by a waste-heat boiler, and clinker is recycled. The device mainly consists of a coal grinding mill, a powder storage bin, an agitator tank, a first filter, a first screw pump, a storage tank, a second filter, a second screw pump, a combustion chamber, a waste-heat boiler and a bag-type dust collector. The disadvantages in the conventional sludge incineration method that the process is complex and the energy consumption during the sludge drying is high are overcome, and the low pollution emission of the flue gas and the comprehensive utilization of the clinker are realized.

Description

technical field [0001] The present invention relates to a sludge resource treatment method, specifically mixing water-containing sludge with coal powder and water to make sludge coal-water slurry, and directly pumping the sludge coal-water slurry to a combustion device to incinerate the sludge method. Background technique [0002] With the development of social economy and urbanization, the production of urban sewage and industrial wastewater continues to increase, and a large amount of wastewater continues to be discharged into rivers, rivers, lakes, and seas, causing serious and widespread pollution of water bodies. Sewage treatment and recycling has become an important task to improve the environment, save water, and achieve sustainable development, and the amount of sludge produced by the treatment of urban sewage and industrial wastewater is increasing rapidly. According to statistics, by the end of 2005, there were more than 780 urban sewage treatment plants in the co...

Claims

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Application Information

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IPC IPC(8): F23G7/00
Inventor 肖睿陈良勇章名耀
Owner SOUTHEAST UNIV
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