A multi-layer vertical biological fermentation drying tower and drying method
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A technology of biological fermentation and drying tower, which is applied in biological sludge treatment, dehydration/drying/concentrated sludge treatment, sludge treatment, etc. It can solve the problems of uncontrollable fermentation process and achieve the effect of improving treatment efficiency
Active Publication Date: 2017-08-04
湖南省春泥环保科技有限公司
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[0008] The purpose of the present invention is to provide a multi-layer vertical biological fermentation drying tower and drying method to solve the technical problem of uncontrollable fermentation process
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Embodiment 1
[0053] After the dewatered sludge is mixed with 80% by weight, 10% of conditioning agent (plant residue dry powder material) and 10% of drying material (sludge material after fermentation and drying), it is sent into the mixing screw machine and stirred evenly, and the water content is Between 68%-70%, it becomes fermented material.
[0054] The fermentation material is sent into the drying tower divided into three layers, and then passes through the fermentation culture area of the upper layer at 45°C, the middle layer at 55°C, and the bottom layer at 45°C, and is discharged by the unloader to leave the drying tower. 55%, the whole process takes about 96h.
[0055] After the dewatered sludge is aerobically fermented in a multi-layer vertical biological fermentation drying tower, the mortality rate of roundworm eggs is >95%; Nitrogen, phosphorus and potassium should be 5% and above, and organic matter should be 35% and above.
Embodiment 2
[0057] After the dewatered sludge is mixed with 60% by weight, 10% of conditioning agent (plant residue dry powder material) and 30% of dry material (secondary fermentation sludge material), it is sent into the mixing screw machine to stir evenly, and the moisture content is Between 68%-70%, it becomes fermented material.
[0058] The fermentation material is sent into the primary drying tower divided into three layers, successively passes through the fermentation culture area of 45°C in the upper layer, 55°C in the middle layer, and 45°C in the bottom layer, and leaves the primary drying tower through unloading machine. The content is about 55%, and the whole process takes about 96 hours.
[0059] The primary fermentation material is sent into the secondary drying tower divided into four layers, and then passes through the fermentation culture area of the first layer at 45°C, the second layer at 50°C, the third layer at 55°C, and the third layer at 45°C. The machine disc...
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Abstract
The present invention provides a multi-layer vertical biological fermentation drying column and a drying method. The inner space of a column comprises, from top to bottom, a plurality of layers of fermentation cultivation areas, an inlet air distribution tube and an outlet air distribution tube provided on a side wall of the column, an unloader provided at the bottom of the column, and a surge hopper provided below the unloader. A temperature measuring instrument, the unloader, the inlet air distribution tube and the outlet air distribution tube are all connected to a controller. The plurality of layers of fermentation cultivation areas, from top to bottom, display a trend of intermediate temperature degradation-high temperature sterilization-secondary high temperature fermentation-intermediate temperature fermentation, wherein the intermediate temperature range is 45-54 DEG C, and the high temperature range is above 55 DEG C. According to the invention, a temperature monitoring device and an on-line analyzer of oxygen, ammonia, and hydrogen sulfide are provided in the fermentation cultivation areas, so that information in the drying column is collected in real time and fed back to the controller; the opening degree of a corresponding assembly is controlled by the controller according to a preset index standard, and therefore the biological fermentation environment in the column is adjusted, an index parameter of the fermented material is improved, and an minimization, stabilization and innocuity objective of sludge treatment is achieved.
Description
technical field [0001] The invention relates to the technical field of urban sewage sludge resource treatment, in particular to a multi-layer vertical biological fermentation drying tower and a drying method. Background technique [0002] According to the Ministry of Housing and Urban-Rural Development's "Notice on the Construction and Operation of National Urban Sewage Treatment Facilities in the Fourth Quarter of 2013", by the end of 2013, the national urban sewage treatment volume reached 149 million cubic meters per day, and the dewatered sludge (with a water content of 80% ) annual output exceeded 39.28 million tons. [0003] In 2011, the Ministry of Housing and Urban-Rural Development and the National Development and Reform Commission jointly organized the compilation of the "Technical Guidelines for Sludge Treatment and Disposal in Urban Sewage Treatment Plants (Trial)", which has important guiding significance for the development of sludge treatment and disposal tech...
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