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Negative-pressure micro-bubble ozone casting water treating method

An ozone treatment and negative pressure technology, applied in the field of water treatment, can solve the problems of high effective water depth of the reactor, large air compressor load, low ozone utilization rate, etc., and meet the needs of improving efficiency and utilization efficiency, and reducing output and pressure. , the effect of staying for a long time

Inactive Publication Date: 2007-09-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing ozone oxidation treatment water method has low dissolved gas efficiency and low ozone utilization rate, and requires an ozone generator to produce large ozone output and high pressure, the effective water depth of the reactor is high, and the load of the air compressor is large. As a result, the problem of high power consumption and high cost is provided, and a method of negative pressure microbubble adding ozone to treat water is provided.

Method used

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specific Embodiment approach 1

[0010] Specific embodiment one: the steps of the method for adding ozone-treated water with negative pressure microbubbles in this embodiment are as follows: adopt the negative pressure dosing method to add ozone to the water to be treated, and the mixed solution of ozone and water is mixed in the booster pump, The mixing time is 1-3S, and then through the bubble shearing device, part of the ozone dissolves into the water, and the undissolved part enters the reactor through the high-efficiency air distributor, and the ozone completes the oxidation and removal of organic pollutants in the reactor; the dosage of ozone 0.5-800 mg / liter of water, the residence time of the gas-water mixture of ozone and water in the bubble shear device and high-efficiency water distributor is 0.5-50 milliseconds, the contact time of ozone and water is 5-100 minutes, the height of the water surface The height is 0.8m to 6m, and the high-efficiency water distributors are arranged in one to three floor...

specific Embodiment approach 2

[0012] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the ozone dosing adopts the whole process gas-liquid mixing method, adopts the partial gas-liquid mixing method or adopts the partial reflux gas-liquid mixing method. Others are the same as in the first embodiment.

[0013] In this embodiment, when the whole-process gas-liquid mixing method is adopted, the ozone negative pressure pump is added before; when the partial gas-liquid mixing method is adopted; the ozone is added to the branch pipe at the inlet pipe of the water to be treated by using the booster pump to add ozone; the partial reflux is used In the gas-liquid mixing mode, an internal circulation pump is installed in the reactor, water is taken from the water outlet of the treatment system, and ozone is added before the internal circulation pump.

specific Embodiment approach 3

[0014] Embodiment 3: This embodiment differs from Embodiment 1 in that the contact mode of the water to be treated is forward flow, countercurrent or mixed flow. Others are the same as in the first embodiment.

[0015] In this embodiment, when the water to be treated is in a downstream contact mode, the water to be treated enters from the bottom of the reactor and flows out from the top; when the water to be treated is in a countercurrent contact mode, the water to be treated enters from the top of the reactor and flows out from the bottom; When the mixed contact mode is used, the water to be treated enters from the middle of the reactor, and the water is discharged from the upper and lower sides of the reactor respectively. In this embodiment, for the downstream contact method, the high-efficiency water distributor is arranged at the bottom of the reactor, and for the countercurrent and mixed flow contact methods, the high-efficiency water distributor is arranged at the middl...

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Abstract

A negative pressure microbubble ozonized water method relates to a water treatment method and overcomes the problem of that the ozonizer has a large ozone output, the pressure is large, the reactor has a high effective depth, the compressor has a large load, and consequently the power consumption is large and the cost is high, which are caused by the lower gas solution efficiency and the lower ozone utilization ratio of the present ozone oxidation water treatment method. In the present invention, ozone enters into the reactor in an ultramicro bubble gas-water mixed liquor fashion by adopting a negative pressure adding method cooperating with a bubble shearing-machine and a high efficiency gas distributor, and completes the oxidation removing of the water contaminant in the reactor; wherein the ozone adding quantity is 0.5~800 mg / l water, the contact time between ozone and water is 5~100 minutes, the water surface height is 0.8~6 m, and the high efficiency water distributor is arranged in a three layers fashion. The method of the present invention can obviously improve the ozone gas solution efficiency and the ozone utilization ratio, reduce the height of the reactor, and reduce the requirement for the output and the pressure of the ozonizer, so as to reduce the cost.

Description

technical field [0001] The invention relates to a water treatment method. Specifically, it relates to an ozone oxidation decontamination method for efficiently dissolving ozone into water by generating ultrafine bubbles. Background technique [0002] Ozone oxidation technology is a traditional water treatment technology that uses the strong oxidizing ability of ozone to oxidize and decompose some easily oxidizable substances in water to remove pollution. It was first applied in Dutch water works in 1893 and has been widely used in the field of water treatment at home and abroad. There are also examples of ozone being used in production in China. In practical applications, the traditional microporous air distribution method is mostly used, the efficiency of ozone dissolution and utilization is low, and it is difficult to effectively increase the concentration of ozone in water. In order to improve the efficiency of ozone dissolved gas, the effective water depth of the react...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78
Inventor 汪群慧翟学东李俊菊池隆重石原和美
Owner HARBIN INST OF TECH
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