CN-122010333-A - Treatment device and method for ruthenium-rhodium-iridium-containing acidic wastewater

Abstract

The invention relates to the technical field of noble metal wastewater treatment, in particular to a device and a method for treating ruthenium-rhodium-iridium-containing acidic wastewater, comprising a resin adsorption unit, a neutralization precipitation unit, an evaporation concentration unit, an aeration unit, an active carbon adsorption unit and a pure water machine unit which are connected in sequence; the resin adsorption unit comprises a resin A adsorption column and a resin B adsorption column, the evaporation concentration unit comprises a compressor, an evaporation cylinder and a condenser which are sequentially connected, the aeration unit comprises an aeration cylinder and a compressed air machine, alkali is added into the neutralization precipitation unit to maintain PH, and the output end of the pure water generator unit is connected with the production water end. The invention has the advantages of high recovery rate, little environmental pollution, high resource utilization rate, water resource saving, and favorable sustainable development and application prospect.

Inventors

• SU LINHUI
• ZHANG CHUANJIE
• SU LIN
• ZHAO YANJIE

Assignees

• 云南弘盛铂业新材料科技有限公司
• 云南弘盛先进功能材料研究院有限公司

Dates

Publication Date

20260512

Application Date

20260211

Claims (6)

1. 1. A treatment device for ruthenium-rhodium-iridium-containing acidic wastewater is characterized by comprising a resin adsorption unit, a neutralization precipitation unit, an evaporation concentration unit, an aeration unit, an active carbon adsorption unit and a pure water making machine unit which are sequentially connected, wherein the resin adsorption unit comprises a resin A adsorption column and a resin B adsorption column, the evaporation concentration unit comprises a distillation kettle connected with the neutralization precipitation unit, an evaporator connected with the top of the distillation kettle, condensers with two ends respectively connected with the evaporator and the distillation kettle, and compressors with two ends respectively connected with the evaporator and the distillation kettle, the aeration unit comprises an aeration cylinder and a compressed air machine, alkali is added into the neutralization precipitation unit to keep PH, and the output end of the pure water making machine unit is connected with a production water end.
2. 2. The device for treating ruthenium, rhodium and iridium-containing acidic wastewater according to claim 1, wherein the resin in the resin A adsorption column is CH40 type resin, and the resin in the resin B adsorption column is CPs-HP50 type resin.
3. 3. The device for treating ruthenium-rhodium-iridium-containing acidic wastewater according to claim 1, wherein the activated carbon adsorption unit comprises a tank body connected with the output end of the aeration unit, a liquid inlet arranged at the top of the tank body, a flushing water outlet arranged in parallel with the liquid inlet, a rectifying plate arranged at the top of the tank body, two isolation nets arranged in parallel and opposite to each other and arranged in the middle of the tank body, activated carbon arranged in the middle of the two isolation nets, a flushing water pipe arranged between the isolation nets and the rectifying plate and communicated with the outside, a saturated carbon recovery pipe arranged above the lower isolation net, sand and stone arranged at the bottom of the tank body and below the lower isolation net, and a liquid outlet arranged at the bottom of the tank body, wherein a flushing water inlet is arranged beside the liquid outlet.
4. 4. The apparatus for treating ruthenium, rhodium and iridium-containing acidic wastewater according to claim 1, wherein the base is a soluble base, and the soluble base comprises sodium hydroxide and potassium hydroxide.
5. 5. The device for treating ruthenium-rhodium-iridium-containing acidic wastewater according to claim 1, wherein the evaporating cylinders comprise at least 3 cylinders which are connected in parallel, the volume of the cylinders is not less than 10m 3 , the cylinders are made of pure titanium, and connecting pipelines between the cylinders are made of pure titanium.
6. 6. A method for treating ruthenium-rhodium-iridium-containing acidic wastewater, characterized in that the ruthenium-rhodium-iridium-containing acidic wastewater is treated by using the treatment device for ruthenium-rhodium-iridium-containing acidic wastewater according to any one of claims 1 to 5.

Description

Treatment device and method for ruthenium-rhodium-iridium-containing acidic wastewater Technical Field The invention relates to the technical field of noble metal wastewater treatment, in particular to a device and a method for treating ruthenium-rhodium-iridium-containing acidic wastewater. Background CN 112811551A discloses a treatment method of electroplating and noble metal smelting wastewater, which comprises the steps of separating and obtaining sludge containing complex-state metal with water content of 85% and part of wastewater through wastewater chelation and precipitation, dehydrating and drying the sludge to water content of 30% to 50%, pouring the sludge into a sludge storage tank, heating the sludge with metal content of more than 5% in the sludge storage tank, burning the sludge with metal content of less than 5%, and detecting whether fly ash generated in the burning process contains heavy metal and whether the heavy metal exceeds standard. CN 105439316A discloses a method for recovering valuable metals from noble metal smelting waste water and carrying out environmental protection treatment on waste materials, which comprises the following steps of regulating the pH value of the solution, carrying out solid-liquid separation, pretreating filter residues, carrying out acid leaching treatment and carrying out harmless treatment on waste liquid. The method has good precipitation effect on Cu, as, ni, zn, pb, se, au, ag, pt, pd and other valuable metal ions in the wastewater, the effluent quality meets the emission standard of copper, nickel and cobalt industrial pollutants (GB 25467-2010), meanwhile, au, ag, pt, pd and other noble metals are effectively enriched in acid leaching residues, and convenience is provided for subsequent comprehensive recovery of the noble metals. The method has obvious advantages, but has poor effect on separating specific platinum group elements, and water resources are not intensively recycled. CN 112811551A incinerates sludge, and has the problems of more smoke dust, loss of part of platinum group metals caused by the entrainment of flue gas, large energy consumption, and the like. Therefore, based on the existing noble metal-containing wastewater process, the development of the ruthenium-rhodium-iridium-containing acidic wastewater treatment method and device with good ruthenium-rhodium-iridium separation effect, resource recycling and environmental friendliness is significant. Disclosure of Invention Features and advantages of the invention will be set forth in part in the description which follows, or may be obvious from the description, or may be learned by practice of the invention. The invention provides a treatment device for ruthenium-rhodium-iridium-containing acidic wastewater, which aims to solve the problems in the prior art and comprises a resin adsorption unit, a neutralization precipitation unit, an evaporation concentration unit, an aeration unit, an active carbon adsorption unit and a pure water making machine unit which are sequentially connected, wherein the resin adsorption unit comprises a resin A adsorption column and a resin B adsorption column, the evaporation concentration unit comprises a distillation kettle connected with the neutralization precipitation unit, an evaporator connected with the top of the distillation kettle, a condenser with two ends respectively connected with the evaporator and the distillation kettle, and a compressor with two ends respectively connected with the evaporator and the distillation kettle, the aeration unit comprises an aeration cylinder and a compressed air machine, alkali is added into the neutralization precipitation unit to keep pH, and the output end of the pure water making machine unit is connected with a production water end. Preferably, the resin in the resin A adsorption column is CH40 type resin, and the resin in the resin B adsorption column is CPs-HP50 type resin. Preferably, the activated carbon adsorption unit comprises a tank body connected with the output end of the aeration unit, a liquid inlet arranged at the top of the tank body, a flushing water outlet parallel to the liquid inlet, a rectifying plate arranged at the top of the tank body, two isolation nets parallel to each other and oppositely arranged at the middle of the tank body, activated carbon arranged between the two isolation nets, a flushing water pipe arranged between the isolation nets and the rectifying plate and communicated with the outside, a saturated carbon recovery pipe arranged above the lower isolation net, sand and stone arranged at the bottom of the tank body and below the lower isolation net, and a liquid outlet arranged at the bottom of the tank body, wherein the flushing water inlet is arranged beside the liquid outlet. Preferably, the base is a soluble base including sodium hydroxide, potassium hydroxide. Preferably, the evaporating cylinder comprises at least 3 cylinders which are connected in parallel, the