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Technology for efficiently treating mine water by using ceramic membrane

A ceramic membrane, mine water technology, applied in neutralization water/sewage treatment, permeation/dialysis water/sewage treatment, etc., can solve the problems of high energy consumption, one-time investment, high operating cost, large investment, etc., to reduce pollution, Avoid unstable water quality and reduce investment and transportation effects

Inactive Publication Date: 2014-04-09
JIANGSU JIUWU HITECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of use, compared with the traditional process, its high energy consumption and large investment have become increasingly prominent, especially the one-time investment and relatively high operating costs of ceramic membranes have discouraged many mine water companies.

Method used

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  • Technology for efficiently treating mine water by using ceramic membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The mine water a of a certain coal mine in Shandong is treated by the process of the present invention, and enters such as figure 1 Shown in the mine water treatment process system. After the mine water a is homogeneously and uniformly adjusted, the supernatant c in the adjustment tank is mixed with acid b to adjust the pH=4.5 through the pipeline, and then enters the ceramic membrane ultrafiltration system, which passes through the ceramic membrane circulation tank 2 and the ceramic membrane circulation pump 3 in sequence. Enter the ceramic membrane module 4 for ultrafiltration. During the ultrafiltration process, gas d is introduced from the bottom of the ceramic membrane module 4 for enhanced filtration. The ratio of gas flow to liquid flow is controlled to be 0.55:1, and the gas pressure is 0.35MPa. After the ceramic membrane serum reaches the standard, it can be directly reused or further processed. After being concentrated to a certain concentration, the ceramic ...

Embodiment 2

[0039] The mine water of a certain coal mine in Shandong is treated by the process of the present invention, and enters such as figure 1 Shown in the mine water treatment process system. After the mine water is homogeneously and uniformly adjusted, the supernatant of the adjustment pool is mixed and added with acid through the pipeline to adjust the pH = 5, and then enters the ceramic membrane ultrafiltration. The ratio of flow to liquid flow is 0.64:1, and the gas pressure is 0.35MPa. After the ceramic membrane clear liquid reaches the standard, it can be directly reused or further treated. After the ceramic membrane concentrated liquid is concentrated to a certain concentration, it becomes a high-solid concentrated liquid and enters the regulating tank. The regulating tank also functions as a sedimentation tank. The sludge after sedimentation enters the plate frame Press filter. The plate and frame filter press sludge obtained after pressing can be discharged directly, and...

Embodiment 3

[0043] The mine water of a certain coal mine in Shandong is treated by the process of the present invention, and enters such as figure 1 Shown in the mine water treatment process system. After the mine water is homogenized and equalized, the supernatant of the adjustment tank is mixed with acid through the pipeline to adjust the pH=5.5, and then enters the ceramic membrane ultrafiltration. During the ultrafiltration process, gas is introduced from the bottom of the ceramic membrane module for enhanced filtration to control The ratio of flow rate to liquid flow rate is 1:1, and the gas pressure is 0.4MPa. After the ceramic membrane clear liquid reaches the standard, it can be directly reused or further treated. After the ceramic membrane thick liquid is concentrated to a certain concentration, it becomes a high-solid concentrated liquid and enters the regulating tank. The regulating tank also functions as a sedimentation tank. Plate and frame filter press.

[0044] In this em...

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Abstract

The invention relates to a technology for efficiently treating mine water by using a ceramic membrane, and belongs to the water treatment field. The technology comprises the following steps: 1, carrying out homogenous and equal quantity adjustment treatment of mine water for treatment; 2, adding an acid to the supernatant obtained in step 1, allowing the acid added supernatant to enter a ceramic membrane ultrafiltration system for ultrafiltration, and introducing a gas in the ultrafiltration process to carry out reinforced filtration; and 3, directly reusing or carrying out depth treatment of the above obtained ceramic membrane clear liquid after the clear liquid reaches standards, discharging an ultrafiltation ceramic membrane liquid concentrate to an adjustment pool after the ultrafiltation ceramic membrane liquid concentrate is concentrated to a certain concentration in order to carry out settlement separation, carrying out frame press filtration of precipitated sludge, discharging the filtered sludge, and allowing the clear liquid obtained after the sludge press filtration to enter the adjustment pool for circulation treatment. The ceramic membrane ultrafiltration system is the core and ensures the continuity of the process and the standard reaching discharge of produced water, and a gas feeding and acid feeding system is the characteristic of the technology in the invention different from other mine water membrane treatment technologies, greatly improves the penetration flux and the water recovery rate of the ceramic membrane, improves the mine water treatment efficiency of the ceramic membrane, reduces the investment and the running cost, and has substantial environmental and economic benefits.

Description

technical field [0001] The invention relates to a process for treating mine water with high-efficiency ceramic membranes, in particular to a process for improving the flux and efficiency of ceramic membranes by adding acid to adjust the pH value and aeration to strengthen ceramic membrane filtration, which belongs to the field of wastewater treatment. Background technique [0002] Coal mine water is an important water resource. It is reported that in the process of coal production in my country, about 2 to 3 billion cubic meters are discharged every year. 3 Mine water, of which the northern region accounts for about 60%, and increases year by year with the increase of coal mining depth. But now my country's coal mine water utilization rate is less than 20%. On the other hand, according to statistics, 40% of my country's mining areas are seriously short of water, and coal-rich areas are often water-poor areas. With the increase of coal mining intensity and the continuou...

Claims

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Application Information

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IPC IPC(8): C02F1/44C02F1/66
Inventor 王志高王金荣周倜彭文博张宏范克银
Owner JIANGSU JIUWU HITECH
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