Comprehensive utilization device and method for sludge

A technology for sludge and dry sludge, which is used in pyrolysis sludge treatment, dehydration/drying/concentrated sludge treatment, special forms of dry distillation, etc. It can avoid the problems of secondary pollution, realize sludge safety and reduce resource consumption.

Inactive Publication Date: 2018-10-12
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent 201710449260.0 discloses a sludge recycling system that uses sludge as fertilizer, but there are pollution problems such as waste water and odor during the production process, and there are also problems such as heavy metal pollution of soil and crops during the use of sludge fertilizer
Chinese invention patent 201711166042.2 discloses a sludge resource utilization device and its method, using sludge to produce pyrolysis gas to achieve denitrification of flue gas from industrial boilers and kilns, but there are odors and flue gas SO in the process 2 , heavy metals and other secondary pollution problems
Chinese invention patent 201510753048.4 discloses a sludge resource treatment method, which realizes resource recovery of sludge through hydrothermal treatment, solid-liquid separation, composite adsorption material adsorption and anaerobic fermentation, but the process is complicated and energy consumption is high
[0005] It can be seen that although extensive research has been carried out on the harmless and resourceful utilization of sludge, there are still many problems in the above research, and it is impossible to realize the complete harmless and resourceful utilization of sludge in the true sense.

Method used

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  • Comprehensive utilization device and method for sludge

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Effect test

Embodiment 1

[0049] The dewatered sludge from the municipal sewage treatment plant is transported to the wet sludge storage tank through the belt conveying system, and then the wet sludge is transported to the dryer through the wet sludge belt conveying system. In the horizontal drum dryer, the wet sludge and The dry flue gas at 300°C is directly contacted, and the wet sludge is dried into dry sludge with a moisture content of 5%, and then the dry sludge and part of the dry sludge collected by the cyclone dust collector and bag filter pass through the dry sludge conveying system It is transported to the dry sludge storage tank for storage, and finally the dry sludge is transported to the sludge pyrolysis gasifier through the belt conveying system, where it is pyrolyzed and gasified at 600°C. Among them, the sludge pyrolysis gasifier is firstly powered by natural gas Start the furnace as a fuel, raise the temperature of the furnace to 600°C, and when the sludge pyrolysis gas produced by slud...

Embodiment 2

[0053] The dewatered sludge from the municipal sewage treatment plant is conveyed to the wet sludge storage tank through the belt conveying system, and then the wet sludge is conveyed to the dryer through the wet sludge belt conveying system. In the horizontal drum dryer, the wet sludge is mixed with 250 The dry flue gas at ℃ is directly contacted, and the wet sludge is dried into dry sludge with a moisture content of 20%, and then the dry sludge and part of the dry sludge collected by the cyclone dust collector and bag filter pass through the dry sludge belt conveying system It is transported to the dry sludge storage tank for storage, and finally the dry sludge is transported to the sludge pyrolysis gasifier through the belt conveying system, where it is pyrolyzed and gasified at 450°C. Among them, the sludge pyrolysis gasifier is firstly powered by natural gas Start the furnace as fuel, raise the temperature of the furnace to 450°C, and when the sludge pyrolysis gas produced...

Embodiment 3

[0057] The dewatered sludge from the municipal sewage treatment plant is transported to the wet sludge storage tank through the belt conveying system, and then the wet sludge is transported to the dryer through the wet sludge belt conveying system. In the horizontal drum dryer, the wet sludge is mixed with 200 The dry flue gas at ℃ is directly contacted, and the wet sludge is dried into dry sludge with a moisture content of 35%, and then the dry sludge and part of the dry sludge collected by the cyclone dust collector and bag filter pass through the dry sludge belt conveying system It is transported to the dry sludge storage tank for storage, and finally the dry sludge is transported to the sludge pyrolysis gasifier through the belt conveying system, and the pyrolysis gasification is carried out at 350°C. Among them, the sludge pyrolysis gasifier is firstly powered by natural gas Start the furnace as fuel, raise the temperature of the furnace to 350°C, and when the sludge pyrol...

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Abstract

The invention provides a comprehensive utilization device for sludge. The comprehensive utilization device for sludge is utilized for sludge treatment, no pollutants are discharged in the overall process of the sludge treatment, so that the problem of secondary pollution of an existing sludge treatment technology is solved, and a new clean and environment-friendly sludge recycling treatment technology is provided; the sludge as a renewable resource is taken as a raw material for producing pyrolysis gas, gas fuel is provided for industrial production and can replace existing non-renewable fossil fuel such as coal, petroleum and the like, and the production cost of an enterprise is reduced while resource consumption is reduced; safe, harmless, clean and recycling treatment of the sludge is realized.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a sludge comprehensive utilization device and method. Background technique [0002] At present, my country produces 30-40 million tons of municipal sludge (water content 80%) every year. How to dispose of sludge in an economical, safe, harmless and resourceful way is one of the major environmental problems that need to be solved urgently in recent years. The composition of municipal sludge is complex. While containing a large amount of organic and inorganic substances, it also contains heavy metals, bacteria, viruses and other toxic and harmful substances to the human body. If it is not disposed of properly, it will pollute the ecological environment and seriously threaten human beings. healthy. [0003] At present, the common sludge disposal methods at home and abroad mainly include landfill, composting, land use, incineration, etc. From the perspective of practi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12C02F11/10C10B53/00
CPCC02F11/10C02F11/12C10B53/00Y02W10/40
Inventor 方平岑超平唐子君唐志雄钟佩怡黄建航
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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