4results about How to "Realize reduction processing" patented technology

The utility model relates to the technical field of copper electroplating waste liquid recovery, in particular to a copper electroplating waste liquid copper sulfate recovery device which comprises a copper sulfate electroplating bath, a temporary storage tank, a heat exchanger, a factory service end ice water machine, a separator, a crystal collecting tank and a volatilization air exhaust dryer. An outlet of the copper sulfate electroplating tank is communicated with an inlet of the temporary storage tank, an outlet of the temporary storage tank is connected with an inlet of the heat exchanger, the heat exchanger is communicated with the factory service end water chiller, cold water of the factory service end water chiller circulates in the heat exchanger, and a filter screen is arranged at the bottom of the heat exchanger and communicated with the dilute waste liquid collecting tank. The copper electroplating wastewater discharge is improved, copper sulfate is separated out and purified through low-temperature crystallization and collected, waste liquid reduction and resource recovery are achieved, the environmental protection effect is optimized, meanwhile, a novel copper sulfate pentahydrate on-line auxiliary recovery process is constructed, simple recovery equipment is additionally arranged on the basis of the original copper electroplating process, and the copper electroplating wastewater is recycled. A waste reduction target can be achieved by invested a small amount of money, and the environment-friendly wastewater treatment cost is greatly reduced.

The utility model relates to the technical field of sludge drying, in particular to a sludge drying reduction device which comprises a drying cylinder, a driving assembly for continuously turning and stirring sludge is arranged at the right end of the drying cylinder, and a purification assembly for discharging and filtering internally heated tail gas is arranged at the top of the left end of the drying cylinder. An air blowing assembly used for internal ventilation is arranged above the right end of the drying cylinder, and a first heating rod is arranged in the heating cabin; according to the sludge drying reduction device, the inclined drying cylinder is arranged, the interior of the drying cylinder is preliminarily heated under the cooperation of a first heating rod, sludge adding is facilitated under the cooperation of a feeding hopper, under the cooperation of a ventilation box and a fan, a second heating rod is started to heat air conveyed into the interior, and drying of the internal sludge is accelerated through hot air; the main shaft rotates to realize synchronous rotation of the main shaft and the fan under the cooperation of the toothed belt, the master-slave fluted disc and the driven fluted disc, and activated carbon filter cotton is matched in the filter box to filter and intercept discharged air, so that particulate matters are prevented from being discharged to pollute the surroundings.

This invention discloses a supersubcritical hydrothermal desorption device and method for treating oily sludge. The device includes a main body, with its top and bottom sealed by an upper and lower end cover, respectively. Inside is a desorption chamber equipped with a guide plate. Its side walls are provided with a primary preheating water inlet, a desorption product outlet, a slag discharge port, and a temperature detection device, all communicating with the desorption chamber. An oily sludge inlet is located on the upper end cover, and a secondary preheating water inlet is located on the lower end cover. This device is compact, easy to operate and maintain, and can effectively achieve the desorption of oily sludge from supersubcritical water flowing against the temperature gradient, as well as the desorption of petroleum components as the temperature gradually increases. This achieves the goals of resource recovery, harmless treatment, and volume reduction of the oily sludge.

This invention discloses a process for preparing modified silica from vanadium ore leaching tailings, belonging to the field of industrial waste treatment and utilization technology. The steps include: (1) non-grinding alkaline leaching of silica: vanadium ore leaching tailings are leached without grinding with sodium hydroxide and water in a certain ratio and then heated for leaching; after cooling, the residue and filtrate are obtained by solid-liquid separation, and the filtrate is water glass; (2) preparation and modification: self-composite electrolyte is added to water glass, and a new combination modifier is added, followed by acid neutralization to produce silica gel precipitate, which is dried and ground to obtain modified silica product; the electrolyte includes 60% to 80% sodium sulfate and 20% to 40% sodium carbonate by mass percentage; the modifier includes 40% to 80% hexadecyltrimethylammonium bromide and 20% to 60% sodium dodecyl sulfate by mass ratio. The process of this invention can turn the vanadium acid leaching tailings from clay vanadium ore into a valuable resource, achieving reduced treatment and resource utilization, while also producing high-quality silica products.