High-concentration organic sludge treatment method

Abstract

The invention discloses a high-concentration organic sludge treatment method. The high-concentration organic sludge treatment method comprises the following steps: preparing organic sludge, performing ozone pretreatment, chemically tempering, performing diaphragm pressure filtration for deep dewatering, granulating the sludge, drying by using a low-temperature heat-pump dehumidifying drying machine, sending the dried sludge into a sludge bin, doping biomass fuel, performing oxygen-enriched combustion, and converting, recycling and applying combustion heat, steam and slag. The whole treatment method is conveniently matched with a full-automatic control system to enhance convenience in management and operation, and the treatment method has a high sludge-dewatering rate, a high sludge combustion utilization rate and high treatment efficiency; closed treatment is adopted in the steps, so that zero exhaust heat emission and zero noise pollution are ensured and the treatment method is more energy-saving, more environment-friendly and safer; sterilization and harm-removing treatment is performed on the sludge in many links, so that the fact that tail gas emission reaches the standard is ensured; sludge incinerating heat is used for generating electricity which is returned to sludge treatment equipment, so that the operating cost is reduced, economic benefits are improved, and sludge reduction from a source, harmless treatment, resource utilization and sludge recycle are really realized.

Description

technical field [0001] The invention relates to the technology in the field of sludge treatment, in particular to a method for treating high-concentration organic matter sludge. Background technique [0002] With the improvement of environmental protection awareness, the urban sewage treatment industry has developed rapidly, the output of urban sludge is increasing day by day, and the problems of sludge disposal and development and utilization are increasingly concerned by people. [0003] The treatment method of most existing sewage treatment plants is that the activated sludge discharged from the secondary settling tank is firstly concentrated and then tempered. Generally, the traditional lime method and other conditioning treatments reduce the volume of the sludge, and the sludge in the sludge Harmful substances such as pathogens and microorganisms still exist in the wet sludge after dehydration and conditioning, but their reduction is not obvious. To achieve the ideal ef...

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Problems solved by technology

[0003] The treatment method of most existing sewage treatment plants is that the activated sludge discharged from the secondary settling tank is firstly concentrated and then tempered. Generally, the traditional lime method and other conditioning treatments reduce the volume of the sludge, and the sludge in the sludge Harmful substances such as pathogens and microorganisms still exist in the wet sludge after dehydration and conditioning, but their reduction is not obvious. To achieve the ideal effect of sludge dehydration, the concentration time is often longer and the conditioning cost is higher; Then, it needs to go through sludge dehydration to achieve reduction treatment, and convert the fluid sludge (with or without concentration) into solid wet sludge; and then use the waste heat boiler to provide steam to dry the sludge. It consumes more energy, and the drying efficiency is not high. At the same time, its drying treatment equipment occupies a large area and is not easy to manage. Finally, incineration treatment is carried out. However, the sludge has a low calorific value and is not easy to burn, often resulting in sludge Insufficient combustion, low combustion efficiency, less slag reduction and other problems, in the actual treatment process, it is often necessary to inject auxiliary fuel such as fuel oil into the boiler to support combustion, so the cost of sludge incineration is also high

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