15 results about "Refinery wastewater" patented technology

The invention discloses a method for recovering precious metal from refining wastewater, and relates to the technical field of wastewater resourceful treatment. Comprising the following steps: adding a porous carbon-based composite material into the acidic silver-containing refining wastewater, and stirring for adsorption to obtain an adsorption solution; the porous carbon-based composite material adsorbing the silver ions is recycled in a filtering or centrifugal separation mode; the porous carbon-based composite material adsorbing the silver ions makes contact with a desorption agent, desorption treatment is conducted, and a regenerated porous carbon-based composite material and a silver-containing desorption solution are obtained through separation; and a reducing agent is added into the silver-containing desorption solution, and silver ions are reduced into elemental silver to be recycled. The precious metal silver in the refining wastewater is recovered by adopting an adsorption method, and the recovery rate of the silver is relatively high.

The invention discloses a method for detecting biotoxicity of refinery wastewater based on dual levels of zebra fish embryos. The method comprises the following steps: S1, analyzing a death rate; s2, oxidative stress level analysis: respectively determining the ROS content and the SOD content of the zebrafish embryos by adopting an ROS kit and an SOD kit so as to determine the oxidative stress level of the zebrafish embryos; and S3, carrying out gene transcriptomics analysis. The invention provides a detection method for comprehensively and effectively determining the biotoxicity of the refinery wastewater by taking omics analysis as a technical means and combining determination of death rate of zebra fish embryos, morphological deformity occurrence condition and oxidative stress level, and a most scientific and reasonable detection result is finally obtained layer by layer progressively. The experimental process has the characteristics of short time period, intuitive and comprehensive experimental result and the like, and can truly reflect the biotoxicity of the refinery wastewater.

The invention discloses a method for recovering precious metal in refining wastewater based on an adsorption method, and relates to the technical field of precious metal recovery. The method comprises the following steps: preparing a porous carbon-based composite adsorbent; adding the porous carbon-based composite adsorbent into the acid wastewater containing noble metal ions for adsorption; mixing the adsorbed adsorbent with a desorption agent containing thiourea and hydrochloric acid for desorption, and separating to obtain a regenerated adsorbent and a desorption solution containing precious metal; ascorbic acid is added into the desorption solution for a reduction reaction, and the precious metal elementary substance is obtained. The precious metal silver in the refining wastewater is adsorbed and recovered by adopting the adsorbent, and the adsorbent has an excellent adsorption and recovery effect on silver.

The utility model discloses a movable agglomerated sludge reactor for refining and chemical sewage treatment. The movable agglomerated sludge reactor comprises an agglomerated sludge reaction box, a reducing pipe, a flow stabilizer, a cyclone separator, a lifter, a hanging frame and a water storage box, sludge is separated through the cyclone separator, sludge discharged by the cyclone separator enters the water storage tank, settling and activating of the sludge are achieved, compared with traditional sludge treatment equipment, the sludge treatment efficiency and quality are improved, the technical problem that the sludge is prone to gathering in the natural settling process is solved, and the sludge treatment effect is improved. And the stability and reliability of the treatment effect are ensured.

This application relates to the field of metal refining, specifically disclosing a process for recovering precious metals from refining wastewater. The process includes the following steps: S1. Adsorption: Adjusting the pH of the refining wastewater to 2-3, then introducing a temperature-sensitive resin for adsorption at an adsorption temperature of 20-28℃; S2. Desorption: Heating the system to a desorption temperature of 42-50℃ and collecting the desorbed liquid; S3. Recovery: Concentrating the desorbed liquid, adding a precipitant and stirring, filtering, and calcining to purify, obtaining elemental precious metals; the temperature-sensitive resin is prepared from N-isopropylacrylamide monomer and organic acid. The process of this application exhibits excellent adsorption performance of precious metal ions even at low temperatures, and automatic desorption can be achieved by controlling the temperature. It has high selectivity for the adsorption of precious metal ions, and the obtained elemental precious metals have higher purity and greater recovery rates, which is of great significance to the field of metal refining.

The utility model discloses a pretreatment device of refinery waste water, including first treatment pond, second treatment pond, third treatment pond and fourth treatment pond, wherein the first treatment pond is homogeneous regulation pond including at least one first stirring device, the first treatment pond includes annular groove pond, the hydraulic retention time of homogeneous regulation pond is 36-48h, and the second treatment pond includes the first stirring device and the second stirring device. The longer the time is, the more thorough the separation of water, oil and mud is; the second treatment tank is an oil separation tank and comprises at least one second stirring device, and the second treatment tank comprises an annular groove-shaped tank; the third treatment pond and the fourth treatment pond form an integrated reaction sedimentation pond, the third treatment pond is a reaction pond, and the fourth treatment pond is a sedimentation pond. The oil refining wastewater pretreatment device disclosed by the utility model is suitable for treating various oil refining and petrochemical wastewater, and better oil-water separation is realized; the discharged sludge is better formed; and the problem of large peculiar smell is avoided.

The invention discloses an adsorbent for recovering precious metals in refining wastewater and a preparation method thereof, and relates to the technical field of recycling of precious metal materials. The method comprises the following steps: preparing a composite carbon source by taking lignin and coffee grounds as raw materials, and carbonizing and etching the composite carbon source and a heteroatom precursor containing Co, N, P, S and Se under the assistance of a template to obtain a hierarchical porous carbon substrate; the preparation method comprises the following steps: preparing a UiO-66-NH2 core-shell structure adsorbent, performing amination and sulfydryl functional modification on the UiO-66-NH2 core-shell structure adsorbent, constructing an interface bridging layer through MXene-phytic acid interpenetration, and finally inducing to grow a UiO-66-NH2 shell layer, thereby obtaining the core-shell structure adsorbent. The adsorbent prepared by the invention has high specific surface area, abundant heteroatom active sites and specific chelating groups, high selectivity, high adsorption capacity and excellent cycle stability for noble metal ions such as Au and the like, and is suitable for efficient recovery of noble metals in complex refining wastewater.

The utility model relates to coking refining wastewater technical field, concretely relates to a kind of combined device of coking refining wastewater treatment, including storage tank, the outside of storage tank is provided with connecting pipe, another end of storage tank is communicated with connecting pipe, another end of connecting pipe keeps communicating with gas collecting pipe, circulation pipeline is provided in gas collecting pipe, one end of circulation pipeline keeps communicating with connecting pipe, another end of circulation pipeline is circulation outlet, and it is fixed on the outside wall of gas collecting pipe, gas outlet is set up in the top end of gas collecting pipe, and gas inlet is set up in the bottom end, improve remaining ammonia water oil discharge mode, strengthen remaining ammonia water oil discharge operation, tar ammonia water separation tank, remaining ammonia water separation tank, remaining ammonia water storage tank oil discharge pipe are changed from original discharge to ammonia water underground tank to use pump direct pumping, increase remaining ammonia water oil discharge volume, reduce remaining ammonia water oil content to ammonia evaporation.

The invention relates to the field of metal refining, and particularly discloses a process for recovering precious metal from refining wastewater. A process for recovering precious metals from refining wastewater comprises the following steps: S1, adsorption: adjusting the pH value of the refining wastewater to 2-3, and then introducing temperature-sensitive resin for adsorption at the adsorption temperature of 20-28 DEG C; s2, desorption: raising the temperature of the system to a desorption temperature of 42-50 DEG C, and collecting a desorption solution; s3, recycling: concentrating the desorption solution, adding a precipitator, stirring, filtering, burning and purifying to obtain a noble metal simple substance; the temperature-sensitive resin is prepared from an N-isopropylacrylamide monomer and organic acid. The process still has an excellent precious metal ion adsorption effect at low temperature, automatic desorption can be achieved by controlling the temperature, the adsorption selectivity of the precious metal ions is high, the obtained precious metal elementary substance has higher purity and larger recovery amount, and the process has great significance in the field of metal refining.

The present invention relates to a process for refinery wastewater treatment. More particularly, the present invention relates to an automated process for treatment of refinery wastewater. The process of the present invention provides complete automation for controlling different critical parameters that enhance biological activity of activated sludge process (ASP) and helps in significant reduction in sludge recycling that increases the treatment efficiency.

The application discloses a method for recovering precious metals from refining wastewater, and relates to the technical field of wastewater resource treatment. The method comprises the following steps: adding a porous carbon-based composite material into acid silver-containing refining wastewater, stirring to carry out adsorption, and obtaining an adsorption liquid; recovering the porous carbon-based composite material for adsorbing silver ions through a filtering or centrifugal separation mode; contacting the porous carbon-based composite material for adsorbing silver ions with a desorption agent to carry out desorption treatment, and separating to obtain regenerated porous carbon-based composite material and silver-containing desorption liquid; and adding a reducing agent into the silver-containing desorption liquid to reduce silver ions into elemental silver for recovery. The method has a high recovery rate of silver in recovering precious metals silver in refining wastewater through adsorption.

This invention discloses a method for removing solid impurities from acidic gas, relating to the field of acidic gas impurity removal. Through a synergistic process of low-temperature plasma pretreatment, multi-stage gradient washing with a composite chelating agent, graded gas-liquid separation, and deep purification via membrane filtration, a stepwise and efficient removal of solid impurities is achieved. Low-temperature plasma pretreatment disrupts the adsorption membrane on the surface of solid impurities and weakens the binding force between ammonia and impurities, laying the foundation for subsequent separation. The composite chelating agent, through graded addition and dynamic replenishment, precisely captures solid impurities and ammonia at different temperature ranges. The graded cross-flow filtration of ceramic microfiltration membranes and organic ultrafiltration membranes deeply removes solid particles, effectively preventing scaling and blockage in downstream pipelines, ensuring continuous operation of the acidic gas treatment unit, and solving a key technical bottleneck restricting the stable operation of the acidic gas recovery process from refinery wastewater.

The present invention relates to a method for refinery wastewater treatment which comprises hybrid electrode system for simultaneous flocculation / coagulation and oxidation in single system. Further, the present invention provides a system for refinery wastewater treatment.

The utility model discloses an oil refining wastewater treatment device with a scum cleaning function, which comprises a treatment pond, a linear moving component, a lifting component, a scum cleaning component and a collecting box, the linear moving assembly comprises a fixing seat arranged on the outer side of the treatment pond, a driving motor arranged on the right side of the fixing seat and a lead screw arranged at the output end of the driving motor, the lifting assembly comprises a support in threaded connection with the lead screw, an air cylinder arranged on the support and a mounting plate arranged at the bottom of the air cylinder, and the scum cleaning assembly is arranged at the bottom of the mounting plate. And the collecting boxes are arranged on the two sides of the treatment pond. By arranging the linear moving assembly, the lifting assembly, the scum cleaning assembly and the collecting box, under the condition that the use of the wastewater treatment device is not affected, the effect of quickly cleaning scum is achieved, the efficiency is high, and meanwhile, sewage on the scum can be collected by arranging the filter screen.

The invention relates to a non-phosphorus composite water treatment agent suitable for a refinery sewage reuse circulating water system, and a preparation method and a use method of the water treatment agent. According to the water treatment agent, isothiazolinone is used as a bactericide, channel protein on a bacterial membrane can be changed, the number of heterotrophic bacteria in sewage recycling circulating water is reduced, breeding and breeding of algae and bacteria in the circulating water are avoided, and then glutamic acid N, N-diacetic acid and diethylene-triamine-pentaacetic acid are utilized to prepare the water treatment agent. According to the present invention, through the chelating effect on microorganisms in circulating water and metal ions in bacterial cell membranes, the bactericide can easily permeate the cell membranes so as to promote the sterilization effect of the bactericide, the sulfonate is the anionic surfactant, and has a certain corrosion inhibition effect on carbon steel, and the zinc salt can form the Zn (OH) 2 protection film on the cathode position so as to further inhibit the corrosive cathode reaction, such that the corrosion resistance of the carbon steel is further improved; the water treatment agent has good compatibility with a chelating agent and a sterilizing agent, and can ensure that a circulating water system can meet various circulating water monitoring indexes after sewage is recycled, and can meet the corrosion resistance requirements that scaling and corrosion do not occur during operation.