Sludge heavy metal, fertilizer and energy recovery system and method
A technology for energy recovery and heavy metals, applied in sludge treatment, pyrolysis treatment of sludge, chemical instruments and methods, etc., can solve the problems of difficult separation and recovery of resources, cell structure damage, etc., to improve economy, reduce energy consumption, Reduce the effect of inhibition
Active Publication Date: 2020-12-22
UNIVERSTAR SCI & TECH SHENZHEN
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Problems solved by technology
Microbial micelles are the main components of municipal sludge. Relevant studies have shown that heavy metals and fertilizers mainly exist in the floc components and colloid components of biological cells. Therefore, when recovering energy or separating heavy metals, the micelles and The cell structure is difficult to obtain the mass transfer conditions required for the separation and recovery of resources and energy, and it is difficult to destroy the cell structure by conventional methods
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[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0040] It should be noted that the descriptions of "first", "second" and so on in the present invention are only for the purpose of description, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutio...
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The invention discloses a system and a method for recovering heavy metals, fertilizer nutrients and energy in sludge. The system for recovering heavy metals, fertilizer nutrients and energy in sludgecomprises a sludge pyrohydrolysis device, a steam boiler, an SRB (sulfate-reducing bacteria) heavy metal separation device, an energy recovery device and a jet device. The system for recovering heavymetals, fertilizer nutrients and energy in sludge realizes fluid lifting, secondary shear grinding of sludge and optimization of screening conditions and biological mass transfer reinforcement of theSRB heavy metal separator and the energy recovery device simultaneously by use of the jet device, metallic minerals, fertilizer nutrients and energy substances in sludge are effectively separated, thedefect that heavy metals cannot fully play resource energy performance and can not be changed into wealth during traditional sludge treatment is overcome, and the effects of simplifying equipment, reducing energy consumption and improving economy are realized.
Description
technical field [0001] The invention relates to the application field of sludge treatment, in particular to a sludge heavy metal, fertilizer and energy recovery system and method. Background technique [0002] As of April 2012, my country's daily sewage treatment capacity has exceeded 100 million cubic meters, and the annual sludge (80% moisture content) output has reached 29 million tons (Announcement on the announcement of key emission reduction projects such as national urban sewage treatment facilities, 2012 No. Announcement 29). [0003] The sludge produced by urban sewage plants contains abundant carbon, nitrogen, and phosphorus elements needed for plant growth. Statistical analysis by Li Yanxia of the Chinese Academy of Sciences believes that the average organic matter content of Chinese urban sludge (excluding industrial sludge) reaches 384g / kg, total nitrogen, total Phosphorus and total potassium are 27, 14.3 and 7g / kg organic matter, total nitrogen and total phosph...
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IPC IPC(8): C02F11/10C02F11/00C02F101/20
CPCC02F11/10C02F11/12C02F2101/20
Inventor 汪可涛兰东洋丁健生李嘉伟褚亚松徐鹏
Owner UNIVERSTAR SCI & TECH SHENZHEN