CN103420522A

CN103420522A - Method for circulating purification recycling of sewage with germanium simple-substance particles

Info

Publication number: CN103420522A
Application number: CN2013103794959A
Authority: CN
Inventors: 刘阅; 王卿泳; 经林; 李�杰
Original assignee: China Germanium Co Ltd
Current assignee: China Germanium Co Ltd
Priority date: 2013-08-28
Filing date: 2013-08-28
Publication date: 2013-12-04
Anticipated expiration: 2033-08-28
Also published as: CN103420522B

Abstract

The invention discloses a method for circulating purification recycling of sewage with germanium simple-substance particles. The method for circulating purification recycling of the sewage with the germanium simple-substance particles comprises the following steps of (1) adding 0.8-1.0kg anhydrous magnesium sulfate powder with the content of 99% to the sewage, with germanium, per cubic meter until the PH value is four; (2) adding solid sodium hydroxide with the content of 96% or solid calcium hydroxide with the content of 96% until the PH value is within the range from seven to eight; (3) standing for 60min to form layers, extracting supernatant liquid, and discharging the supernatant liquid; (4) continuing to collect the sewage with the germanium from the sewage with sediments; (5) repeating the steps for 6-7 times, and collecting the sediments to carry out germanium recycling. Due to the facts that magnesium sulfate hydrolyzes to form part of colloidal substances after the magnesium sulfate reacts with the sewage, and the colloidal substances has adsorption capacity to the germanium in the sewage, when a certain amount of the solid magnesium sulfate is added to the sewage with the germanium particles, adsorption of the germanium particles in the sewage can be promoted. Due to the facts that repeated recycling of a water purifying agent, namely magnesium sulfate, is carried out, and the germanium particles in the sewage are adsorbed, a water source is purified, germanium resources are recycled, and over-high cost caused by a single use can also be reduced.

Description

A kind of circularly purifying recovery method of germanic simple substance particle sewage

Technical field

The present invention relates to a kind of sewage purification process, be specifically related to a kind for the treatment of process of germanic sewage.

Background technology

Germanium is a kind of important strategic resource, belongs to dissipated metal.In recent years along with the germanium metallic state is constantly strengthened in the application in the fields such as infrared optics, solar cell substrate, germanium single crystal has formed required device through the processing treatment of the techniques such as cutting, grinding, polishing and cleaning corrosion, also produced a large amount of germanic waste water, to being recycled into for a significant task of germanium in the germanic waste water produced in these processes simultaneously.

Summary of the invention

Goal of the invention: the object of the invention is to for the deficiencies in the prior art, the circularly purifying recovery method of the germanic simple substance particle sewage that a kind of organic efficiency is high is provided.

Technical scheme: the invention provides a kind of circularly purifying recovery method of germanic simple substance particle sewage, comprise the following steps:

(1) sal epsom is met the water hydrolysis and is formed the colloid thing, germanium in waste water is had to adsorptive power, therefore add the anhydrous slufuric acid magnesium dust that 0.8 ~ 1.0kg content is 99% in the germanic waste water of every cubic metre, until pH value reaches 4, be conducive to hydrolysis fully, prevent too acid hydrolytic reaction of sal epsom, lose the adsorptive power to germanium;

(2) add solid sodium hydroxide that content is 96% or solid hydrogen calcium oxide until pH value reaches 7 ~ 8, form magnesium hydroxide or calcium hydroxide precipitation, germanium is carried out to deep layer absorption;

(3) demixing phenomenon appears in standing 60min, extracts supernatant liquid and is discharged, and to the supernatant liquid after purifying, can carry out regeneration, and lower sediment is germanic settling;

(4) continue to collect germanic waste water in leaving the waste water of precipitation;

(5) repeating step (1) ~ (4) is 6 ~ 7 times, and collecting precipitation carries out the germanium recovery.

Further, for preventing that germanic settling is in the process repeatedly purified, adsorptive power descends or occurs by the anti-molten leaching germanium of water system, detect in step (5) when sedimental ge content reaches 25% and do not advise continuing to use, and stop repetition, precipitation is carried out to centralized recovery pending, to the germanium in precipitation, can extract recycling.

Beneficial effect: sal epsom is met water hydrolysis forming section colloid thing, the colloid thing has adsorptive power to the germanium in waste water, add a certain amount of sal epsom solid in the waste water that contains the germanium particle, can in waste water, promote the germanium particle to be adsorbed, the present invention is by the repeated regeneration utilization of water purification agent sal epsom, the germanium particle of absorption in sewage, not only purified water source but also reclaimed the germanium resource, also saves simultaneously and use produce excessively expensive because of single.

The accompanying drawing explanation

Fig. 1 is for being used the operating gear of the inventive method.

Embodiment

Below technical solution of the present invention is elaborated, but protection scope of the present invention is not limited to described embodiment.

Embodiment:

Embodiment 1: a kind of circularly purifying recovery method of germanic simple substance particle sewage, as shown in Figure 1, collect germanic simple substance particle sewage in sewage reception tank 3, germanic sewage flows automatically and enters sewage reception tank 3 by high potential difference, drop into the anhydrous slufuric acid magnesium dust that content is 99% in sewage reception tank 3, add 0.8kg in the germanic sewage of every cubic metre, until pH value reaches 4, continue to add wherein sodium hydroxide agitation as appropriate until PH reaches 7 ~ 8, make it form magnesium hydrate precipitate, continue germanium is carried out to deep layer absorption; After upper and lower demixing phenomenon occurring, when the germanic amount of detection supernatant liquid is less than 5mg/L, uses relay pump 6 to extract supernatant liquids and squeeze into the pending pond 4 of secondary after standing 60min, now clear liquid purifies fully, reach and can reuse standard, then discharge into water reservoir 5, use to treat him; Continue to discharge germanic sewage in sewage reception tank 3 by sewer line 7, repeat said process 7 times, after the ge content in the detection seabed sediment reaches 25%, stop circularly purifying, collect settling and be transferred to storage tank 1; 2, germanium is wherein extracted to recycling.

The process for purifying water of the present embodiment is renewable, compares cost with the disposable purification of water project of routine and can reduce by 60%, can further to the water resources after purifying, be utilized simultaneously, easy to operate; On the other hand, greatly improved the organic efficiency of germanium in germanic sewage, the present embodiment germanium rate of recovery reaches 98%, has avoided resource loss.

Embodiment 2: roughly the same with embodiment 1 step, difference is to add the anhydrous slufuric acid magnesium dust that 0.9kg content is 99% in the germanic sewage of every cubic metre, after reaching 4, pH value adds calcium hydroxide, formation magnesium hydroxide and calcium hydroxide precipitation are adsorbed germanium, regulate pH value to 7 ~ 8; The present embodiment is because forming the precipitation of two kinds of high adsorption capacities, the most thorough to the purification separation of germanic sewage, and the germanic amount of supernatant liquid can reach below 3mg/L, and the germanium rate of recovery reaches 99%.

Embodiment 3: roughly the same with embodiment 1 step, difference is to add the anhydrous slufuric acid magnesium dust that 1.0kg content is 99% in the germanic sewage of every cubic metre, to purify removal process and repeat 7 times, in settling, ge content reaches 25% and again germanium is extracted to recovery.

As mentioned above, although meaned and explained the present invention with reference to specific preferred embodiment, it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite that does not break away from the claims definition, can make in the form and details various variations to it.

Claims

1. the circularly purifying recovery method of a germanic simple substance particle sewage is characterized in that: comprise the following steps:

(1) add the anhydrous slufuric acid magnesium dust that 0.8 ~ 1.0kg content is 99% in the germanic waste water of every cubic metre, until pH value reaches 4;

(2) add solid sodium hydroxide that content is 96% or solid hydrogen calcium oxide until pH value reaches 7 ~ 8;

(3) layering appears in standing 60min, extracts supernatant liquid and is discharged;

(5) repeating step (1) ~ (4) is 6 ~ 7 times, and the collecting precipitation thing carries out the germanium recovery.

2. the circularly purifying recovery method of germanic simple substance particle sewage according to claim 1, is characterized in that: detect in step (5) when sedimental ge content reaches 25% and stop repetition.