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Method for circulating fluidization and normal-temperature deoxygenization

A circulating fluidization and circulating water flow technology, applied in chemical instruments and methods, separation methods, degassed water/sewage treatment, etc., can solve the problems of large power consumption, complex deoxygenation process system at room temperature, etc., to avoid filter material knots block, good oxygen removal effect, and the effect of reducing oxygen concentration

Inactive Publication Date: 2013-07-17
麻克栋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to overcome the deficiencies in the process and power consumption of the existing normal temperature oxygen removal equipment, the present invention provides a method for normal temperature oxygen removal. Bed normal temperature deoxygenation process system is complex and power consumption is large, so a good deoxygenation effect can be obtained

Method used

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  • Method for circulating fluidization and normal-temperature deoxygenization

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Comparison scheme
Effect test

Embodiment 1

[0042] The amount of supplemented water is 5 tons / hour, the oxygen concentration of the supplemented water is 8.3mg / l, and the oxygen content of the effluent is required to be 0.01mg / l.

[0043] There is only one fluidization chamber, and the cross-sectional area of ​​the fluidization chamber is 0.1m 2 , filled with sponge iron filter material, the height is 0.5 meters.

[0044] A filter is set between the fluidization chamber and the circulation pump.

[0045] According to the above formula, the circulation ratio x≥1+a*c / 200s*h, and the above data are substituted, x≥5.15, that is, the minimum circulation ratio is 5.15, so as to ensure that the oxygen content of the effluent meets the requirements.

[0046] At this time, the flow rate of the circulating pump is 25.75t / h.

[0047] The bottom of the fluidization chamber is the inlet, and the top is the water outlet. Under this flow rate, the sponge iron filter material is suspended boiling.

Embodiment 2

[0049]The amount of supplemented water is 10 tons / hour, the oxygen concentration of the supplemented water is 5 mg / l, and the oxygen content of the effluent is required to be 0.05 mg / l.

[0050] There is only one fluidization chamber, and the cross-sectional area of ​​the fluidization chamber is 0.2m 2 , filled with steel shavings filter material, the height of the filter material layer is 1.0 meters.

[0051] A filter is set between the fluidization chamber and the circulation pump.

[0052] According to the above formula, the circulation ratio x≥1+a*c / 200s*h, and the above data are substituted, x≥2.25, that is, the minimum circulation ratio is 2.25, so as to ensure that the oxygen content of the effluent meets the requirements.

[0053] At this time, the flow rate of the circulating pump is 22.5t / h.

[0054] The bottom of the fluidization chamber is the inlet, and the top is the water outlet. Under this flow rate, the steel shavings filter material is suspended.

Embodiment 3

[0056] The amount of supplemented water is 50 tons / hour, the oxygen concentration of the supplemented water is 9mg / l, and the oxygen content of the effluent is required to be 0.01mg / l.

[0057] Two fluidization chambers are connected in parallel, and the cross-sectional area of ​​a single fluidization chamber is 0.25m 2 , filled with sponge iron filter material, the layer height is 0.8 meters.

[0058] According to the above formula, the cycle rate x≥1+a*c / 200s*h, and the above data are substituted, x≥6.625, that is, the minimum cycle rate is 6.625, so as to ensure that the oxygen content of the effluent meets the requirements.

[0059] At this time, the flow rate of the circulating pump is 331.25t / h.

[0060] The bottom of the fluidization chamber is the inlet, and the top is the water outlet. Under this flow rate, the sponge iron filter material is fluidized.

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Abstract

The invention discloses a method for circulating fluidization normal-temperature deoxygenization, which is used for removing oxygen in water by reducing filter material at normal temperature. Circulating flow is generated between the inlet and the outlet of a reaction chamber by a circulating pump, water which needs to be deoxygenized is mixed with the circulating flow at the inlet of the circulating pump to enter the reaction chamber; then, the mixture reacts with the reducing filter material in the reaction chamber to remove oxygen; and deoxygenized water is introduced out from the outlet of the reaction chamber. The inlet of the reaction chamber is arranged on the bottom, the outlet is arranged on the top, and the filter material is under the fluidization or suspension state when the flow enters the reaction chamber so as to prevent the filter material from caking, enhance mass transfer and quicken reaction speed. Because of circulation, the filter material can be guaranteed to be in the fluidization or suspension state even if the amount of water which needs to be deoxygenized is small, and thus good deoxygenization effect is obtained.

Description

technical field [0001] The invention relates to a process for removing oxygen dissolved in water at normal temperature. Background technique [0002] There are generally two ways to remove oxygen from water: physical and chemical. [0003] Physical methods include thermal deaeration and vacuum deaeration. Thermal deoxygenation is to heat water to reduce the solubility of oxygen in water to remove oxygen. For example, under normal pressure, the saturated solubility of oxygen in water at 25°C is 8.3mg / l, and it is almost zero at 100°C. Most of the oxygen can be removed when the temperature rises to 100°C. Vacuum deoxygenation removes oxygen by changing the fluid pressure and lowering its boiling point so that it reaches the boiling point at room temperature. [0004] The disadvantage of thermal deaeration and vacuum deaeration is that it needs to consume a large amount of steam or power, especially in oil field water injection deaeration or cooling water deaeration of heat ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/00C02F1/20
Inventor 麻克栋
Owner 麻克栋