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High-shear-force efficient jet aeration system and method

A high-efficiency jet flow and aeration system technology, applied in water aeration, chemical instruments and methods, sustainable biological treatment, etc., can solve the problem of enhancing liquid phase main turbulence and shear force, accelerating gas-liquid interface renewal, reducing liquid Film thickness and other issues, to achieve high total oxygen transfer efficiency, enhance turbulent flow and shear force, and save power consumption

Pending Publication Date: 2022-02-08
上海复森环境科技发展有限公司
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AI Technical Summary

Problems solved by technology

[0005] Therefore, in view of the above problems, this technical solution proposes a high-efficiency jet aeration system and method with strong shear force. Based on the jet aeration technology, by changing the shape of the traditional jet aeration nozzle and increasing the pressure of the aeration nozzle, the turbulence and shear force of the liquid phase body are greatly enhanced, the renewal of the gas-liquid interface is accelerated and the liquid The thickness of the film makes the jetted air bubbles smaller and shaped like a bubble cloud, which greatly increases the gas-liquid contact area, making the new type of high-efficiency jet aeration with strong shear force have the same total oxygen transfer efficiency as microporous aeration of great significance

Method used

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  • High-shear-force efficient jet aeration system and method

Examples

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Effect test

Embodiment example 1

[0072] For wastewater from a pharmaceutical factory, the theoretical oxygen demand AOR of the aeration tank is 225kgO2 / h, and the water depth of the aeration tank is 6.5m. The technological parameters of the new jet aerator, traditional jet aerator and microporous aeration using this technical solution are designed The comparison is as follows:

[0073]

[0074] Table 1: Comparison table of aeration process parameters of the new jet aerator, traditional jet aerator and microporous aerator of this technical solution;

[0075] From the above calculation and comparison, it can be seen that under the design condition of a water depth of 6.5m, the total power of the blower and the jet circulation pump of the new jet aerator system of this technical solution is basically the same as the power of the blower of the microporous aeration system, while the traditional jet aerator The total power of the air blower and the jet pump of the aeration system is about 25% higher than that of...

Embodiment example 2

[0078] For wastewater in a chemical industry park, the theoretical oxygen demand AOR of the aeration tank is 1000kgO2 / h, the water depth of the jet aeration tank is 8m, and the water depth of the microporous aeration tank is 6m for design;

[0079] The technical parameters of the new jet aerator, the traditional jet aerator and the microporous aeration are compared as follows:

[0080]

[0081] It can be seen from the above calculation and comparison that the jet aeration can operate well under the design condition of a water depth of 8m, and it is a simple and optimal economic water depth. When the water depth exceeds 8m, the selection range of the blower is small. In this implementation case, the total installed power of the blower and jet pump of the high-efficiency jet aeration system of this technical solution is 538kw, which is about 24.3% lower than the installed power of 711kw using a traditional jet aerator. The standard oxygen utilization rate increased from 32.3%...

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Abstract

The invention discloses a high-shear-force efficient jet aeration system and method, and relates to the field of wastewater aerobic biochemical treatment. The system comprises a mud-water mixed liquid circulating reflux pipe, a mud-water mixed liquid circulating reflux pump, a backwashing pipeline with a manual valve, an air pipe communicated with external air or an air blower, and a plurality of flat cavity channels with cavities. Flat notch outer nozzles are mounted at the positions, opposite to the flat cavity channels, of the side part of the mud-water mixed liquid circulating reflux pipe through a gas-liquid mixing cavity outer sleeve by utilizing a threaded connection structure, and flat notch inner nozzles are mounted in the mud-water mixed liquid circulating reflux pipe. According to the invention, the high-shear-force high-efficiency jet aeration has the same oxygen total transfer efficiency and power efficiency as micro-porous aeration; the system is maintenance-free and has a backwashing function, when impurities enter an aeration pipeline or the nozzles and block the aeration system, backwashing can be carried out to discharge the impurities out of the aeration system, and the use and maintenance efficiency is high; and the jet aerator disclosed by the invention has the advantages of high temperature resistance, corrosion resistance, long service life and convenience in disassembly and replacement.

Description

technical field [0001] The invention belongs to the field of aerobic biochemical treatment of wastewater, in particular to a high-efficiency jet aeration system with strong shear force and a high-efficiency jet aeration method with strong shear force, which are widely applicable to aerobic biochemical treatment of municipal sewage, industrial wastewater, etc. Efficient aeration application in process. Background technique [0002] The most important thing in the wastewater aerobic biochemical treatment process is to carry out blast aeration in the aeration tank in the form of blast aeration to provide enough oxygen for aerobic microorganisms to biochemically degrade organic pollutants. According to statistics, in the overall operating cost of the sewage plant, the power consumption for aeration accounts for 50-70% of the total operating wastewater. The operation of waste water is a problem that all sewage plants attach great importance to. [0003] Blast aeration is a form...

Claims

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Application Information

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IPC IPC(8): C02F7/00
CPCC02F7/00Y02W10/10
Inventor 邵婷
Owner 上海复森环境科技发展有限公司
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