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Recycling and reuse process of desulfurization wastewater based on composite membrane system

A desulfurization wastewater, composite membrane technology, applied in membrane technology, semi-permeable membrane separation, water/sewage treatment, etc., can solve the problems of reducing the total wastewater recovery rate and increasing the operating cost of the zero-discharge system, and improve the water recovery rate. , Excellent operational stability, the effect of ensuring stability

Active Publication Date: 2022-03-01
HUANENG SHANDONG POWER GENERATION CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the arrangement of the membrane system increases, the ability to treat complex wastewater will be stronger, but after combining too many membrane treatment units, the total wastewater recovery rate of the composite membrane system will decrease, and the amount of wastewater that needs to be evaporated will increase. , leading to a sharp increase in the operating costs of the entire wastewater zero discharge system

Method used

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  • Recycling and reuse process of desulfurization wastewater based on composite membrane system
  • Recycling and reuse process of desulfurization wastewater based on composite membrane system
  • Recycling and reuse process of desulfurization wastewater based on composite membrane system

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Embodiment approach

[0055] The third embodiment of the present invention provides an application of the above-mentioned modified ceramic membrane in the treatment of desulfurization wastewater.

[0056] The fourth embodiment of the present invention provides a composite membrane system, including a ceramic membrane filtration unit and a reverse osmosis membrane filtration unit connected in sequence, and the ceramic membrane used in the ceramic membrane filtration unit is the above-mentioned modified ceramic membrane.

[0057] In one or more examples of this embodiment, a first filter is included, and the outlet of the first filter is connected to the inlet of the ceramic membrane filtration unit.

[0058] In this series of embodiments, the first filter is a laminated filter.

[0059] In this series of embodiments, a booster pump is provided between the first filter and the ceramic membrane filter unit, and the outlet of the booster pump is connected to the inlet of the ceramic membrane filter uni...

Embodiment 1

[0078] Soak the ceramic membrane with a cut-off pore size of 50nm in 3% hydrochloric acid for 12 hours, then apply ultrasound and continue cleaning for 1 hour. Then wash with desalinated water until the pH of the cleaning solution is not lower than 5.5. The treated ceramic membrane was then soaked in 1% Fe(NO 3 ) 3 , 0.1% Mn(NO 3 ) 2 and 0.1% Co(NO 3 ) 2 In the mixed solution, let stand for adsorption for 24 hours, wash with desalted water until it is colorless, put it into a muffle furnace for calcination after drying. The calcination process is to first raise the temperature to 500°C at 4°C / min, hold for 4 hours, then raise the temperature to 800°C at 2°C / min, hold for 2 hours, wash with 1% hydrochloric acid until colorless after cooling, and then wash with desalted water to pH Not less than 5.5, to obtain a modified ceramic membrane.

[0079] A composite membrane system, such as figure 1 As shown, it includes laminated filter 1, booster pump 3, ceramic membrane unit...

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Abstract

The invention discloses a desulfurization wastewater recovery and reuse process based on a composite membrane system. The treatment process of the ceramic membrane used in the composite membrane system is to place the ceramic membrane in dilute hydrochloric acid for soaking treatment, and then place the soaked ceramic membrane in a Adsorption treatment is carried out in the salt solution of ferric nitrate, manganese nitrate and cobalt nitrate, and the ceramic film after the adsorption treatment is calcined in the air atmosphere, and the ceramic film after the calcined is washed with dilute hydrochloric acid and water in sequence; the dilute hydrochloric acid is HCl solution with a mass fraction not higher than 5%. This process treats desulfurization wastewater, improves the concentration efficiency of desulfurization wastewater, obtains reusable water sources, reduces the evaporation of final concentrated water, and ensures the stable operation of the entire membrane system.

Description

technical field [0001] The invention belongs to the field of waste water treatment and recycling, and relates to a combination technology based on a special treatment ceramic membrane and a reverse osmosis membrane, in particular to a technology for recycling desulfurization wastewater based on a composite membrane system. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the increasing demand for power generation and heat supply, the amount of desulfurization wastewater produced by various power plants is increasing. Since desulfurization wastewater belongs to the terminal wastewater of the whole plant, it has the characteristics of many types of pollutants, complex wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/12B01D65/06C02F9/02
CPCB01D67/0093B01D65/02C02F1/001C02F1/44C02F1/441B01D69/12C02F2303/14Y02A20/131
Inventor 焦绪常高冰孙业富李亚明李尊峰王蕴宏张志霞杜纪明
Owner HUANENG SHANDONG POWER GENERATION CO LTD
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