CN103420522B - Method for circulating purification recycling of sewage with germanium simple-substance particles - Google Patents

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

(2) add content be 96% solid sodium hydroxide 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) there is demixing phenomenon in standing 60min, extracts supernatant liquid and discharge, and to the supernatant liquid after purifying, can carry out regeneration, and lower sediment is germanic settling;

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

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

Further, for preventing that germanic settling is in the process repeatedly purifying, adsorptive power declines or occurs by the anti-molten leaching germanium of water system, in step (5), detect 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: magnesium sulfate is met water hydrolysis forming section colloid thing, colloid thing has adsorptive power to the germanium in waste water, in the waste water that contains germanium particle, add a certain amount of magnesium sulfate solid, can in waste water, promote that germanium particle is adsorbed, the present invention utilizes by the repeated regeneration of water purification agent magnesium sulfate, the germanium particle of absorption in sewage, has not only purified water source but also reclaimed germanium resource, also saves simultaneously and uses produce excessively expensive because of single.

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, in sewage reception tank 3, collect germanic simple substance particle sewage, germanic sewage is flow automatically and is entered sewage reception tank 3 by high potential difference, to dropping into content in sewage reception tank 3, it is 99% anhydrous slufuric acid magnesium dust, in the germanic sewage of every cubic metre, add 0.8kg, 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 to carry out deep layer absorption; After standing 60min, after there is upper and lower demixing phenomenon, 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, now clear liquid purifies fully, reach and can reuse standard, then discharge into water reservoir 5, to treat that he uses; By sewer line 7, continue to discharge germanic sewage in sewage reception tank 3, repeat said process 7 times, after the ge content in 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 can reduce by 60% with the disposable purification of water project of routine, can further to the water resources after purifying, utilize 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 that in the germanic sewage of every cubic metre, to add 0.9kg content be 99% anhydrous slufuric acid magnesium dust, 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 that in the germanic sewage of every cubic metre, to add 1.0kg content be 99% anhydrous slufuric acid magnesium dust, 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 represented and explained the present invention with reference to specific preferred embodiment, it shall not be construed as the restriction to the present invention self.Not departing under the spirit and scope of the present invention prerequisite of claims definition, can make in the form and details various variations to it.

Claims (2)

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

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

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

(3) there is layering in standing 60min, extracts supernatant liquid and discharge;

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

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

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