5results about How to "Reduce processing operating costs" patented technology

The present application relates to the field of coking, synthetic ammonia and the like containing ammonia wastewater treatment, and discloses a novel ammonia evaporation energy-saving process system, a primary ammonia evaporation tower, an intermediate pressurizing pump set, a water flow regulating device, a secondary ammonia evaporation device, a flash tank, a steam ejector, a pressurizing pump set and a control unit. After the ammonia-containing wastewater is preliminarily treated by the primary ammonia evaporation tower, it is delivered to the secondary ammonia evaporation device by the pressurizing pump, and introduced into new steam for secondary ammonia evaporation. After the secondary ammonia evaporation, the wastewater flows into the flash tank to produce flash steam by cooling and pressure reduction, and the flash steam is pressurized by mixing with the new steam through the steam ejector, and then returns to the primary ammonia evaporation tower or the secondary ammonia evaporation device, so that the steam is recycled multiple times. The system can effectively reduce the new steam consumption by 35-45% under the premise of ensuring the stability of the ammonia nitrogen index of the effluent, improve the energy utilization rate, reduce carbon emissions, and is suitable for direct ammonia evaporation and indirect ammonia evaporation systems.

The application discloses a double-layer liquid layer photocatalytic reactor, which comprises a circular tubular reactor with a cavity, the circular tubular reactor comprises a cylindrical ultraviolet lamp tube and two layers of annular liquid layers; wherein the cylindrical ultraviolet lamp tube is located at the center of the circular tubular reactor, one end of the ultraviolet lamp tube is connected with electricity, and the ultraviolet lamp tube can emit ultraviolet light to the surrounding; wherein the inner layer of the two layers of annular liquid layers is wrapped outside the cylindrical ultraviolet lamp tube, and the outer layer of the two layers of annular liquid layers is wrapped outside the inner layer; wherein the two sides of the inner layer and the outer layer of the two layers of annular liquid layers are respectively provided with water inlets and water outlets, the water inlet of the inner layer and the water outlet of the outer layer are located on the same side and are adjacently arranged, and the water outlet of the inner layer and the water inlet of the outer layer are located on the other side and are adjacently arranged.

The application discloses a method for preparing arsenic-cadmium alloy by using arsenic-cadmium acid waste liquid, and belongs to the technical field of wastewater treatment. The application realizes the selective precipitation of arsenic and cadmium in the form of Cd5H2(AsO4)4.4H2O with high purity and complete crystal form by precisely controlling the molar ratio of cadmium to arsenic in the waste liquid to be 1.2-1.6 and adjusting the pH of the precipitation to be 4-6, thereby realizing the deep removal of the two toxic elements of arsenic and cadmium, and the removal rate of arsenic can reach more than 96.70%, and the process flow is greatly reduced. The Cd5H2(AsO4)4.4H2O-based precipitation slag is converted into high-purity arsenic-cadmium alloy by carbon thermal reduction, the amount of slag is greatly compressed, and the storage and landfill of waste materials are significantly reduced. The alloy can be further used to prepare downstream products such as semiconductor materials as a high-value-added product, realizes the high-value conversion from harmful waste to high-end raw materials, and has remarkable green disposal and resource utilization benefits.

This invention proposes a method for treating and reusing lead-zinc ore beneficiation wastewater. The method includes pretreatment of the raw ore to obtain a raw ore slurry, followed by a flotation process. The flotation process includes lead flotation of the raw ore slurry and zinc flotation of the lead flotation tailings. The resulting lead concentrate slurry, zinc concentrate slurry, and tailings slurry undergo solid-liquid separation using reagents and a thickener. Wastewater overflowing from the thickener is transported to a mixing tank for collection. The outlet of the mixing tank is connected to the inlet of an adsorption tower group, and the wastewater overflows into the adsorption tower group. After adsorption, the wastewater overflows into a pump tank, where sodium sulfide is added. The wastewater is then pumped to a high-level water tank and finally reused in the flotation process. This method avoids the investment in large-scale water treatment equipment, uses conventional water treatment reagents, is environmentally friendly and economical, requires small amounts, and is widely available, reducing water treatment operating costs and reagent consumption. The process specifically treats wastewater and has broad application prospects for achieving zero discharge of non-ferrous metal beneficiation wastewater.

This utility model belongs to the field of coal chemical wastewater pretreatment technology, and discloses a resource substance recovery system for coal chemical wastewater, including an adsorption separation system, an adsorption material regeneration system, and a recovery and regeneration system. The adsorption separation system is used to adsorb and separate resource substances in the wastewater to be treated using adsorption materials. The resource substances in the wastewater to be treated include oils and phenols. The adsorption material regeneration system is used to regenerate the adsorption material using a regeneration solution. The recovery and regeneration system is used to regenerate the regeneration solution and separate and recover the adsorbed resource substances. This utility model achieves efficient separation of oils and phenols by filling the adsorption separation device with adsorption material. The adsorption material regeneration system provides a regeneration solution to the adsorption separation device to achieve elution and regeneration of the adsorption material, thereby realizing the recycling of the adsorption material and effectively reducing the recycling and treatment cost.