Method and device for extracting rare and precious metals from salt-containing wastewater

A technology of salty wastewater and extraction methods, which is applied in chemical instruments and methods, water pollutants, natural water treatment, etc., can solve problems such as interference of rare and precious metals, achieve optimal treatment of effluent quality, improve reusability, and excellent active effect

Pending Publication Date: 2021-02-26
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The method of the present invention solves the problem of rare and precious metals in the process of pharmaceutical wastewater treatment, and the problem of rare and precious metal interference treatment, and extracts rare and precious metals in pharmaceutical wastewater on the basis of crystallization chemistry, which reduces the amount of waste for the subsequent treatment of pharmaceutical wastewater. Unnecessary interference improves the reusability of rare and precious metals, reduces the cost of pharmaceutical wastewater treatment and improves treatment efficiency, and optimizes the quality of effluent water

Method used

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  • Method and device for extracting rare and precious metals from salt-containing wastewater
  • Method and device for extracting rare and precious metals from salt-containing wastewater
  • Method and device for extracting rare and precious metals from salt-containing wastewater

Examples

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Effect test

Embodiment 1

[0036] Example 1: Silver 15mg / L, platinum 13mg / L, vanadium 8mg / L, etc. in a synthetic pharmaceutical wastewater. This example mainly detects the content of three heavy metals, silver, platinum and palladium, pH=6.5;

[0037] Such as figure 1 , 2 As shown, the extraction device includes an extraction chamber 1, a sealing cover 2, a feed pipe 3, an agitator 4, and a motor 5. The sealing cover 2 is arranged on the top of the extraction chamber 1 and sealed, and the bottom of the extraction chamber is funnel-shaped. There is a sediment discharge port 8 at the bottom of the body, and the extraction cavity is placed on a support. The outlet ends of the water inlet pipe 6 and the liquid inlet pipe 7 extend to the upper end of the feeding pipe 3 and communicate with each other. The lower end of the feeding pipe 3 passes through the sealing cover It enters the extraction cavity and is fixedly connected and communicated with the liquid inlet 9 of the agitator. A pulley is fixed on the ...

Embodiment 2

[0043] Example 2: A synthetic pharmaceutical wastewater contains 3 mg / L of silver, 2 mg / L of platinum, and 2.9 mg / L of vanadium, etc. This paper mainly detects the contents of three heavy metals, silver, platinum and palladium, pH=8.1;

[0044] Such as figure 1 , 3 As shown, the structure of the extraction device is the same as in Example 1, except that the stirring blade is a trapezoidal blade; 3 / min, 0.5L / min are passed into the feed pipe 3 from the water inlet pipe 6 and the liquid inlet pipe 7, the mixed liquid enters the agitator, and the agitator 5 rotates at 1200rpm under the action of the motor 5, and the high-intensity agitation destroys the precious The binding force of the metal combination; open the liquid outlet 11, and adjust the water flow to 0.6m 3 / min; After 20 minutes of reaction, open the sediment discharge port 8 to discharge the sediment, and adjust the discharge flow to 0.6m 3 / min, in case the flow is too large to cause a large amount of waste water...

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Abstract

The invention discloses a method for extracting rare and precious metals from salt-containing wastewater. The method comprises the following steps that a precipitant solution with the mass concentration of 1 to 5 percent is added into wastewater when the wastewater flows into an extraction device, wherein the extraction device comprises an extraction cavity, a sealing cover, a feeding pipe, a stirrer and a motor, the stirrer rotates at a speed of 800-1200 rpm, a mixture of the precipitant solution and the wastewater is quickly thrown to the inner wall of the extraction cavity under the actionof supergravity, a precipitant reacts with metal in the wastewater under the action of baffles to generate precipitate, and the precipitate is quickly settled to the bottom of the extraction cavity between the baffles, so that extraction and collection of rare and precious metals are realized. According to the method, resource utilization of rare and precious metals in the salt-containing wastewater and primary treatment of the salt-containing wastewater are realized, and the influence of the rare and precious metals on subsequent treatment steps is reduced.

Description

technical field [0001] The invention belongs to the technical field of saline wastewater treatment, in particular to a method and device for extracting rare and precious metals from saline wastewater. Background technique [0002] With the development of society, in recent years, my country's pharmaceutical preparation industry has developed rapidly, and saline wastewater has become one of the serious pollution sources, especially pharmaceutical wastewater with complex components, many types of organic pollutants, high concentration, and high content of rare and precious metals. The COD value and BOD value are high and fluctuate greatly, the BOD / COD value of the wastewater has a large difference, the suspended solids and NH 3 -N concentration is high, the color is deep, and it contains difficult biodegradable and toxic substances. The pollutant discharge standard system consists of six standards, namely fermentation, chemical synthesis, extraction, traditional Chinese medici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F101/20C02F103/34
CPCC02F1/52C02F2101/20C02F2103/343
Inventor 瞿广飞吴丰辉刘亮亮李军燕任远川宁平
Owner KUNMING UNIV OF SCI & TECH
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