A kind of bed material carrier particle for fluidized bed sewage treatment system and preparation method thereof

A technology of sewage treatment system and carrier particles, which is applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of no literature reports, etc., and achieve low manufacturing cost, stable performance, The effect of low system energy consumption

Active Publication Date: 2016-06-08
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] There is no literature report on the preparation of bed material carrier for composite fluidized bed sewage treatment by using plastic and inert materials

Method used

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  • A kind of bed material carrier particle for fluidized bed sewage treatment system and preparation method thereof
  • A kind of bed material carrier particle for fluidized bed sewage treatment system and preparation method thereof
  • A kind of bed material carrier particle for fluidized bed sewage treatment system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A bed material carrier particle for a fluidized bed sewage treatment system, which is prepared from quartz sand powder and polyethylene in a ratio of 0.15:0.85, and the preparation method includes the following steps: mixing inert filler and plastic, and then heating until the plastic melts temperature, after the mixture is mixed evenly, it is prepared into cylindrical or spherical particles through wire drawing and granulation process (such as image 3 shown), the obtained carrier particle density is 1.20X10 3 kg / m 3 , The particle equivalent diameter is 0.6mm. Such as figure 2 As shown, the fluidization velocity of the carrier particles in the sewage can be controlled at about 5mm / s, and the particle take-out velocity is about 18mm / s. Under the condition of ensuring an appropriate reflux ratio, it is beneficial to reduce the overall operating energy consumption of the system. At the same time, the take-out speed is about 4 times of the normal fluidization speed, ...

Embodiment 2

[0036] Referring to Example 1, the difference is that the carrier particles are prepared by mixing limestone powder and recycled mixed plastics at a ratio of 0.25:0.75, and the prepared carrier particles have a density of 1.30×10 3 kg / m 3, The particle equivalent diameter is 0.3mm. The obtained carrier particles are soaked in scrap iron powder water with a mass fraction of 0.1% for 24 hours before being put into a sewage fluidized bed.

Embodiment 3

[0038] Referring to Example 1, the difference is that the carrier particles are prepared by mixing limestone powder and recycled mixed plastics at a ratio of 0.05:0.95, and the prepared carrier particles have a density of 1.05×10 3 kg / m 3 , The particle equivalent diameter is 1.0mm. The obtained carrier particles are soaked in scrap iron powder water with a mass fraction of 0.5% for 30 hours before being put into a sewage fluidized bed.

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Abstract

The invention discloses a bed material carrier particle used in a fluidized bed sewage treatment system and a preparation method thereof. The bed material carrier particle is mixed with an inert filler and plastic, and then heated to the melting temperature of the plastic, and after the mixture is uniformly mixed, the Through the process of wire drawing and granulation, it is prepared into cylindrical or spherical particles, and the density of the carrier particles is 1.05-1.30X10 3 kg / m 3 , the particle equivalent diameter is 0.3mm ~ 1.0mm. The invention has the advantages of low manufacturing cost, good fluidization characteristics and stable performance; good particle film-forming characteristics, the removal rate of total nitrogen reaches 85%, the removal rate of total phosphorus reaches 89.5%, the average removal rate of total COD reaches 84%, and the removal rate of ammonia nitrogen reaches 84%. The removal rate reached 88%. When running in a fluidized bed, the energy consumption of the system is small, which is beneficial to the stable operation of the system.

Description

Technical field: [0001] The invention relates to the technical field of environmental protection, in particular to a bed material carrier particle used in a fluidized bed sewage treatment system and a preparation method thereof. Background technique: [0002] The "12th Five-Year Plan" Comprehensive Work Plan for Energy Conservation and Emission Reduction (Guo Fa [2011] No. 26) promotes the construction of urban sewage treatment facilities and supporting pipe networks, upgrades existing facilities, and strengthens nitrogen and phosphorus removal. By 2015, basically realize that all counties and key towns have sewage treatment capacity, increase the daily sewage treatment capacity of 42 million tons nationwide, build about 160,000 kilometers of supporting pipe networks, and achieve an urban sewage treatment rate of 85%, forming a chemical oxygen demand and ammonia nitrogen reduction capacity of 2.8 million tons and 300,000 tons. Continue to promote the special action of energ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/00
Inventor 王小波李海滨赵增立刘安琪钟慧琼祝京旭
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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