Experiment device for carrying out continuous desorption on adsorbed heavy metal residues by utilizing high-pressure CO2

Abstract

The invention discloses an experiment device for carrying out continuous desorption on adsorbed heavy metal residues by utilizing high-pressure CO2. The experiment device comprises a high-pressure reaction kettle and a kettle cover which is fixed on the high-pressure reaction kettle in a pressing and sealing manner; a gas steel cylinder at one side of the high-pressure reaction kettle is connectedwith a gas inlet of a gas inlet general pipe through a gas pipe; the gas inlet general pipe is connected with an in-kettle gas inlet pipe which extends below the liquid level of the high-pressure reaction kettle in a sealing manner, and a water tank gas inlet pipe which extends into a distilled-water water tank in the sealing manner; the bottom of the distilled-water water tank is connected witha water inlet pipe which extends into the high-pressure reaction kettle in the sealing manner; a communication pipe which is communicated with the atmosphere is arranged at the upper part of the high-pressure reaction kettle; a sampling pipe switching valve is arranged at the lower part of the high-pressure reaction kettle. The continuous desorption device disclosed by the invention has the advantages of simple structure, convenience for utilization and time saving and labor saving; the concentration of desorbed heavy metal ions is convenient to monitor in real time; meanwhile, the desorptionefficiency is greatly improved and heavy metal resources are easy to concentrate and recycle.

Description

technical field [0001] The invention belongs to the technical field of continuous desorption devices, in particular to a 2 Experimental device for continuous desorption of adsorbed heavy metal residues. Background technique [0002] At present, the problem of heavy metal pollution is becoming more and more serious, which not only restricts the development of economy, but also brings great harm to people's health. Heavy metal pollutants in the environment mainly enter the natural environment through discharge and leakage, and have obvious carcinogenic, mutagenic and mutagenic effects on organisms. The discharge of a large amount of toxic heavy metal waste / wastewater not only seriously pollutes the environment and threatens human health, but also causes a lot of waste of heavy metal resources. How to effectively control heavy metal pollution is an important issue in environmental protection and comprehensive utilization of resources. The efficient removal and high-value reu...

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Problems solved by technology

The disadvantages of these methods are: (1) using a liquid desorbent, the desorbed solution cannot be effectively concentrated; (2) the obtained desorbed solution contains impurity ions and cannot be directly reused

However, CO 2 The one-time desorption rate of heavy metal desorption by desorption method is not high, although gaseous CO 2 Multiple intermittent desorption can achieve a high desorption rate, but at the same time it brings problems such as complex operation, loss of chromium slag, and high cost. There is still a big gap between the large-scale, economical and efficient treatment of chromium-containing industrial wastewater.

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