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Method for processing high temperature condensed water by integration technique of membrane

A high-temperature condensate, membrane integration technology, applied in adsorption water/sewage treatment, permeation/dialysis water/sewage treatment, etc., can solve the problems of unstable treatment effect, frequent replacement of adsorbent materials, etc., to achieve stable and reliable effluent quality, beneficial to Long-term stable operation, reduced equipment investment and operating costs

Active Publication Date: 2009-10-07
NANJING JIUSI HIGH TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for treating high-temperature condensate with a membrane integration process in view of the water quality characteristics of high-temperature condensate, so as to solve the problem of unstable treatment effect of conventional treatment methods and the need to frequently replace adsorption materials, and realize the reuse of treated water up to the standard. Provide a stable and effective way for high-temperature condensate treatment and reuse in related enterprises

Method used

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  • Method for processing high temperature condensed water by integration technique of membrane
  • Method for processing high temperature condensed water by integration technique of membrane
  • Method for processing high temperature condensed water by integration technique of membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 (flow process is as figure 1 )

[0033] 50L steam condensate A at 65°C is passed into the condensate treatment system, and the water quality of the steam condensate is shown in Table 1.

[0034] Membrane filtration unit 3 adopts a modified polyethersulfone hollow fiber microfiltration membrane with a pore size of 0.8 μm and a membrane area of ​​8 m 2 . Use as attached figure 1In the dead-end filtration method shown, the membrane filtration unit 3 is a modified polyethersulfone hollow fiber microfiltration membrane, which is placed in the high-temperature condensate storage tank 1 and powered by the suction pump 2 connected to the permeation side of the membrane. The operating pressure is 0.02MPa, under this condition, the stable flux through the microfiltration membrane is 0.5m 3 / 11, the water quality of membrane filtrate is shown in Table 1.

[0035] The membrane permeated water of the membrane filtration unit 3 is sucked out by the pump 2 and sent t...

Embodiment 2

[0039] Embodiment 2 (flow process is as figure 2 )

[0040] Pass 50L steam condensate A at 80°C into the condensate treatment system. The water quality of the steam condensate is shown in Table 1.

[0041] Membrane filtration unit 3 uses a 19-channel tubular ceramic microfiltration membrane with a pore size of 200nm and a membrane area of ​​0.5m 2 . Use as attached figure 2 In the dead-end filtration method shown, the membrane filtration unit 3 is a multi-channel tubular microfiltration membrane made of zirconia material, which communicates with the high-temperature condensate storage tank 1, and is driven by a centrifugal pump connected between the high-temperature condensate storage tank and the membrane inlet. 2 to provide power, the operating pressure is 1.2MPa, under this condition the average flux of the microfiltration membrane is 1.7m 3 / h, when the membrane flux drops to 0.5m 3 / h, backwash the permeation side of the ceramic membrane with compressed air for 10s...

Embodiment 3

[0046] Embodiment 3 (flow process is as image 3 )

[0047] Pass 50L steam condensate A at 95°C into the condensate treatment system. The water quality of the steam condensate is shown in Table 3.

[0048] Membrane filtration unit 3 adopts a 19-channel tubular ceramic ultrafiltration membrane with a pore size of 20nm and a membrane area of ​​3m 2 . Use as attached image 3 In the cross-flow filtration method shown, the membrane filtration unit 3 is a multi-channel tubular ultrafiltration membrane made of alumina, which communicates with the high-temperature condensate storage tank 1, and is connected by a centrifugal filter connected between the high-temperature condensate storage tank and the membrane inlet. The pump 2 provides power, the operating pressure is 0.35MPa, the high-temperature condensed water in the liquid storage tank 1 is sent to one side of the ultrafiltration membrane of the membrane filtration treatment unit 3 through the pump 2, and the permeate penetrat...

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Abstract

The invention relates to a method for treating high-temperature condensed water by a membrane integration process, which is used for purifying and treating high-temperature condensed water from boiler hot steam, and belongs to the technical field of water treatment and heat energy recovery. This method uses a microfiltration or ultrafiltration membrane with a pore size of 0.01 to 1 μm to filter high-temperature condensed water at a temperature of 50°C to 95°C under a pressure of 0.01 to 1.5MPa to retain most of the oil, colloid and suspended matter in the water. Impurities, and then carry out subsequent adsorption or further ion exchange treatment. The present invention solves the problem of unstable treatment effect of conventional treatment methods and frequent replacement of adsorption materials, and realizes the reuse of treated effluent up to standard. Reuse provides a stable and efficient approach.

Description

technical field [0001] The invention relates to a method for purifying and treating high-temperature condensed water, in particular to a method for treating high-temperature condensed water from boiler hot steam by a membrane integration process, and belongs to the technical field of water treatment and heat energy recovery. Background technique [0002] Chemical industry, thermal power and other industries widely use superheated steam as thermal power and heat source. Superheated steam is condensed into high-temperature condensed water after power consumption and heat exchange. According to calculations, 1 ton of 90°C high-temperature condensate has a unit heat value of 4.94 yuan, and the economic benefits of recycling are significant. [0003] If it is not polluted, the steam condensed water is close to pure distilled water and can be recycled back to the boiler for reuse. However, due to pipe corrosion, material leakage, poor management and other reasons, the steam conden...

Claims

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Application Information

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IPC IPC(8): C02F1/44C02F1/28
Inventor 邢卫红徐南平
Owner NANJING JIUSI HIGH TECH
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