Deep dehydration device and deep dehydration method for organic materials
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A deep dewatering, organic material technology, applied in chemical instruments and methods, water/sludge/sewage treatment, energy and wastewater treatment, etc., can solve the problem of high energy costs
Inactive Publication Date: 2015-05-20
ZHEJIANG HAILIANG SOLID WASTE TREATMENT TECH
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The general drying method can remove the water ...
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Embodiment 1
[0049] refer to figure 1 , figure 2 with image 3 , a deep dehydration device for organic materials, comprising:
[0050] Dehydration pretreatment device 2: including a centrifuge or filter press equipment to dehydrate the organic particulate material with a moisture content higher than 90% to a moisture content of 85 to 90%. The dehydration pretreatment device 2 includes a material inlet 21 and a material outlet 22, and additive storage tanks and other material inlets can be added before feeding if necessary;
[0051] Pretreatment tank 3: the pretreatment tank 3 is a vertical barrel-shaped tank, and the pretreatment tank 3 includes a stirring device 34, a feed port 31, a discharge port 32, a first heat recovery device 10 (the first heat recovery device 10 is There are materials with air and steam, and the best choice of equipment is heat pipe heat exchanger, as shown in the figure, the first heat energy recovery equipment 10 can be built in the pretreatment tank 3 and de...
Embodiment 2
[0067] In this embodiment, the organic granular materials are from a county-level city sewage treatment plant to treat mixed sewage containing domestic and industrial second-class. The secondary sewage treatment sedimentation tank produces about 100t (tons) of sludge every day. The test results show that it contains 4.33% of N (on a dry basis), P 2 o 5 2.08% (dry basis), K 2 O 0.55% (on a dry basis), organic matter 35.13% (on a dry basis), cellulose 18% (on a dry basis), a calorific value of 13,300J / g, and a moisture content of 96.0% before pressure filtration. The treatment plant After adding flocculant, it is 82.1%, Ph 7.39, COD 1205mg / g, BOD 125mg / g, Na 0.83%, Cl 0.15%. The elemental analysis results were C 27.46%, N 4.53%, H 4.40%, S 1.15%, and O 21.46%. Heavy metal content in mg / Kg dry basis: Cr 513.86, Pb 23.85, Cd 0.12, As 36.44, Hg 0.36, Cu 160.91, Ni 86.85, Zn 1183.3. Trace organic substances detected by gas chromatography mass spectrometry (GC / MS) are 2,400 phen...
Embodiment 3
[0074] In this embodiment, the biogas residue treatment after anaerobic fermentation treatment of kitchen waste is taken as an example.
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Abstract
The invention relates to a deep dehydration device and deep dehydration method for organic materials and belongs to the field of sludge treatment. The deep dehydration device and the deep dehydration method are used for realizing the deep dehydration of organic granular materials. The deep dehydration method for the organic materials comprises the following steps: (a) carrying out pretreatment: stirring the organic granular materials, and adjusting the additive, moisture content and temperature of the organic granular materials; (b) carrying out thermal hydrolysis: putting the organic granular materials pretreated in the step (a) into a hydrolysis tank, carrying out thermal hydrolysis on the organic granular materials so as to destroy sticky organic substances outside granules of sludge or mud materials and liberate biochemical water organic matters contained in the granules, and thus, hydrolyzing the biochemical water organic matters contained in the granules; (c) carrying out thermal oxidation: putting a thermal hydrolysis product obtained in the step (b) into an oxidation tank, and carrying out thermal oxidation on the thermal hydrolysis product so as to release biochemical water; (d) carrying out solid-liquid separation: dehydrating a product obtained in the step (c), wherein after dehydration, a solid substance can be directly recovered as a solid organic fertilizer, and a liquid substance can be concentrated and oxidized as a liquid organic fertilizer.
Description
technical field [0001] The invention relates to a deep dehydration device for organic materials and a deep dehydration method thereof, belonging to the field of sludge treatment. Background technique [0002] Traditional sewage treatment plant biochemical sludge treatment methods generally adopt concentration, stabilization, dehydration, drying / solidification, cracking and other treatment methods, and then landfill, incineration, composting and effective utilization (mostly for garden or agricultural use) and other disposal methods . The water content of biochemical sludge in general sewage treatment plants is very high after gravity sedimentation, which can reach 98 to 99%. After the sludge is thickened, the water content can be reduced to about 91% to 97%. Concentration can achieve sludge reduction. The current sludge concentration methods without flocculants include gravity concentration method, mechanical concentration method, air flotation concentration method, centr...
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