7results about How to "Extended regeneration cycle" patented technology

The utility model provides equipment for improving metal ion adsorption capacity of chelating resin, which comprises a resin absorption tower, a conveying hole, a water distributor, a water outlet valve and an exhaust valve are arranged on the resin absorption tower, a water inlet valve is arranged on the water distributor, and the particle size of the chelating resin in the resin absorption tower is 0.4 mm. The equipment further comprises a movable resin adding device, the movable resin adding device is used for being matched with the conveying hole, and the pressure of 0.4 MPa is adopted for providing displacement power for the chelating resin. More metal ions can be adsorbed in the resin absorption tower, the lower the content of the metal ions in the saline water is, the smaller the damage to the electrolytic bath is, and the higher the quality of the produced product is.

The present application relates to a kind of micro CO efficient removal adsorbent and its preparation and application, the preparation method includes the following steps: (1) active carbon powder, active component A, inorganic clay and dispersing agent are placed in ball mill and are uniformly ground, and mixture material is obtained;(2) active component B and the water solution of reducing agent are atomized and sprayed into the mixture material, then glue is added, and wet material is obtained;(3) wet material is extruded into shape by template, after heat reduction, after drying, calcination, CO removal adsorbent is obtained, i.e. target product;Active component A is monovalent copper salt, and active component B is the mixture of lanthanum chloride and at least one of cerium chloride or yttrium chloride.The strength and adsorption capacity of the CO removal adsorbent of the present application are increased by more than 30% and 25% respectively, the strength is ≥40N / cm, the wear is ≤1.5wt%, the CO adsorption capacity is ≥35ml / g (40℃), the removal precision can reach below 0.01ppm, suitable for the efficient purification of trace CO in hydrogen, nitrogen and other raw gas.

This invention discloses a deep defluorination device and its defluorination process for wastewater, relating to the field of defluorination equipment. It includes a resin column with an inner temperature-regulating column coaxially arranged inside and an outer temperature-regulating column coaxially arranged on its outer wall. The inlet of the outer temperature-regulating column is located at its top, and its outlet is located at its bottom. The inlet and outlet of the inner temperature-regulating column are opposite to those of the outer temperature-regulating column. A spiral tube is located inside the outer temperature-regulating column, with its top end connected to both an air inlet pipe and a regeneration liquid inlet pipe located outside the resin column. The bottom end of the spiral tube is connected to a cleaning water inlet pipe located outside the resin column. This invention utilizes flowing temperature-regulating water to transfer heat through the side walls of the resin column and the inner temperature-regulating column, rapidly achieving indirect temperature regulation of the liquid inside the resin column during both the adsorption and regeneration phases, thus balancing the adsorption efficiency and capacity during the adsorption phase.

A method for maximizing the production of benzene and xylene from heavy feedstock includes the following steps in sequence: Step 1, feeding the heavy feedstock into a coking unit for processing; Step 2, feeding the diesel fraction produced in Step 1 into a hydroconversion unit for processing; Step 3, feeding the naphtha fraction produced in Step 1 (first generation) and the naphtha fraction produced in Step 2 (second generation) into a reforming unit for processing; Step 4, feeding the aromatic products, mainly benzene and xylene, produced in Step 3 into an aromatic separation unit for processing to obtain high-purity benzene and xylene.

The utility model relates to the technical field of purification gas pre rectification, propose a kind of drying qualified purification gas pre rectification system, the design is provided with adsorption switching assembly in pre rectification tower body and vice warehouse, adsorption switching assembly includes the inner ring seat rotationally connected in the middle part of pre rectification tower body inside, upper closure plate is fixedly connected with in pre rectification tower body inside and located above inner ring seat, inner ring seat inside is fixedly connected with middle plate in the middle, adsorbent for adsorbing alcohol impurities is independently provided with in inner ring seat inside and located middle plate both sides, heating regeneration component that can heat and discharge adsorbent alcohol impurities is arranged at inner ring seat at pre rectification tower body outside, spraying component that can prewash purification gas is arranged at pre rectification tower body inside and located adsorption switching assembly below;Through adsorption-regeneration integrated continuous operation design and spraying-adsorption collaborative purification structure solve the problem of adsorbent regeneration efficiency low and purification effect unstable in prior art.

This invention discloses a method for treating highly hydrochloric acid wastewater from the rare earth industry by recycling hydrochloric acid, belonging to the field of rare earth metallurgical wastewater treatment and resource recovery technology. The method includes the following steps: first, homogenizing the wastewater, followed by primary membrane filtration to remove the extractant and secondary membrane filtration to remove impurities; then, tertiary membrane forced circulation for extractant-water separation; and finally, deep purification through ion exchange to complete the treatment. This invention provides a method for treating highly hydrochloric acid wastewater from the rare earth industry by recycling hydrochloric acid. This method has strong acid resistance and adaptability, requires no reagent adjustment, achieves thorough extractant and impurity removal, has a high resource recycling rate, achieves zero discharge, has strong process stability, good shock resistance, and high industrial adaptability, enabling large-scale industrial application. It solves the problems of high reagent consumption, incomplete hydrochloric acid recovery, easy membrane and resin fouling, waste of extractant resources, and easy secondary pollution in existing treatments of highly hydrochloric acid wastewater from the rare earth industry.

The invention provides a method for removing aluminum elements in brine used in a chlor-alkali electrolysis process, comprising: S1, mixing water with raw salt to obtain saturated crude brine; S2, sending the saturated crude brine, sodium carbonate and sodium hydroxide into a primary reaction tank to react and generate calcium carbonate and magnesium hydroxide; S3, sending disodium hydrogen phosphate and a mixed solution in the primary reaction tank into a secondary reaction tank, and the remaining calcium and magnesium ions react to generate calcium hydrogen phosphate and magnesium hydrogen phosphate; S4, sending the mixed solution in the secondary reaction tank into a filter for filtration; S5, adding hydrochloric acid to the filtered brine, sending the brine into a buffer tank, so that the pH of the brine in the buffer tank is 5-6, and the aluminum element reacts to generate aluminum hydroxide colloid; S6, sending the mixed solution in the buffer tank into a filtering device for filtration, and sending the filtered clear liquid into a brine tank. The invention can effectively reduce the calcium / magnesium ion content and the aluminum element content in the brine, is beneficial to reducing the adsorption load of a resin tower, and improves the quality of the raw material liquid sent to an ion membrane electrolyzer.