43results about How to "Solving Wastewater Problems" patented technology

The invention discloses an automatic zongzi filling equipment and process. The equipment comprises a rotary table moving intermittently, a conveying mechanism, a feeding mechanism, a sealing mechanism and an output mechanism, wherein the conveying mechanism, the feeding mechanism, the sealing mechanism and the output mechanism are sequentially distributed in the circumferential direction of the rotary table; a plurality of clamping mechanisms are mounted on the rotary table in the circumferential direction; each clamping mechanism comprises a pair of supporting arms, the distance between each pair of supporting arms is adjustable, and each supporting arm is provided with a clamping jaw used for clamping a packaging bag; the conveying mechanism comprises a supply tank used for containing the packaging bags and a movable suction cup used for transferring the packaging bags in the supply tank to the clamping mechanism one by one; the feeding mechanism comprises a pair of bag opening suction cups matched with the obverse sides and the reverse sides of the packaging bags and a material conveying pipe feeding materials to the opened packaging bags; the sealing mechanism comprises two heat sealing films matched with each other; the output mechanism is used for carrying conveyor belts of products released by the clamping mechanisms. According to the equipment and process, zongzi can be automatically formed, production and manufacturing efficiency is improved, and cost and energy consumption are reduced.

The invention discloses a method for recovering aluminum electrolysis waste cathode carbon blocks, which comprises the following steps: (1) crushing and screening waste cathode carbon blocks to obtaincarbon particles; (2) mixing the carbon particles with a sulfuric acid solution to obtain slurry A, and then performing pressure leaching to obtain a slurry B; (3) evaporating and concentrating the slurry B until the mass percent of water is lower than 8% to obtain a slurry C; (4) adding concentrated sulfuric acid into the slurry C to obtain a slurry D, roasting at 150-300 DEG C for 0.5-10 hours,and roasting at 300-600 DEG C for 0.5-8 hours to obtain baked carbon; and (5) heating the baked carbon to 1200-3000 DEG C, and keeping the temperature for 0.5-20 hours to obtain the purified carbon.In the treatment process, high-temperature fluorine-containing flue gas and fluorine-containing wastewater are not generated, and fluorine, aluminum and carbon materials can be recycled, so that comprehensive recycling and cleaning treatment of the aluminum electrolysis waste cathode carbon blocks are realized.

The invention relates to a quality-improving process and apparatus for high-ash low rank coal and enables the problem that conventional quality-improving processes for low rank coal can only remove moisture but cannot remove ash to be overcome. The quality-improving process provided in the invention comprises the steps of primary drying for removal of external water in coal, secondary drying for removal of internal water in coal, dry cooling and removal of ash in cooled coal through winnowing so as to obtain high-quality coal. The apparatus provided in the invention comprises a drying system, a cooling system and a winnowing dedusting system. According to the invention, the advantages of a simple process, capacity of effectively removing water and ash, low production cost, low energy consumption and small investment for equipment are obtained.

The invention belongs to the technical field of chemical preparation of environmental materials, and particularly relates to a preparation method and application of a corncob biomass carbon dot composite Bi2WO6 photocatalyst based on magnetic Fe3O4 modification. The method comprises the following steps: step 1, treating a corncob precursor; step 2, preparing biomass carbon dots (CDs); step 3, preparing Bi2WO6; step 4, preparing Fe3O4; step 5, preparing CDs/Bi2WO6; and step 6, adding the CDs/Bi2WO6 obtained in the step 5 into the Fe3O4 nanosphere precursor solution obtained in the step 4, conducting heating in a polytetrafluoroethylene reaction kettle, washing the obtained product with ethanol and deionized water, and conducting drying for later use. The magnetic Fe3O4 modified corncob biomass carbon dot composite Bi2WO6 photocatalyst prepared by the method is used for photocatalytic degradation of tetracycline. The corncobs are applied to preparation of biomass carbon dots, so that waste is turned into wealth; and Fe3O4 is used as a composite material to prepare the composite photocatalyst, so that the catalyst can be recycled and reused, and the waste of resources is avoided. Thephotocatalyst has excellent photocatalytic activity and stability.

The invention relates to a method for removing a base catalyst from crude biodiesel. The method comprises the following step of: removing the base catalyst from the crude biodiesel by taking glycerin as an extracting agent, wherein the extraction temperature is 60-150DEG C, the operating pressure is normal pressure, and a mass ratio of the crude biodiesel to the glycerin is 10-1. Compared with the prior art, the method has the advantages that: 1, the method for removing the base catalyst from the biodiesel by taking the biodiesel byproduct glycerin as the extracting agent avoids a problem of wastewater caused by a water washing process; 2, the base catalyst dissolved in the glycerin phase is separated in a cooling crystallization mode, the glycerin and the base catalyst can be cyclically applied to a production process mechanically, and production cost is reduced; and 3, the base catalyst is effectively removed, alcoholysis in the high temperature vacuum rectification process of the biodiesel is avoided, and the biodiesel rectification yield is improved.

The present invention is household water treating method and system with antioxidant reverse osmosis film. In the household water pipeline, are set successively a pressure limiting valve to limit the water pressure, a ultrafiltering water purifier to treat water initially to obtain sanitary water, and a antioxidant reverse osmosis unit with reverse osmosis film to treat partial water into pure water, with the concentrated water flowing out the reverse osmosis film being returned to the sanitary water treating unit. The present invention has simple water pre-treating process, low system operation pressure, less leakage possibility, low running cost and other advantages.

The invention relates to a sincalide solid-liquid-phase combined synthesis method. The technical problems are mainly solved that raw materials are high in price and after-treatment is complicated in the prior art. According to the technical scheme, the sincalide solid-liquid-phase synthesis method includes the following steps of firstly, synthesizing an Fmoc-Asp-Phe-CONH2 dipeptide segment througha liquid phase method; secondly, loading the dipeptide segment on 2-chlorotrityl chloride resin to obtain Fmoc-Asp(beta-2Cl-Trt Cl resin)-Phe-NH2; thirdly, sequentially connecting residual protectionamino acids through a solid-phase synthesis method to obtain a sincalide resin peptide (Asp-Tyr(SO3H)-Met-Gly-Trp-Met-Asp(beta-2Cl-Trt Cl resin)-Phe-CONH2); fourthly, conducting cutting to obtain a crude sincalide product (Asp-Tyr(SO3H)-Met-Gly-Trp-Met-Asp-Phe-CONH2), and conducting efficient liquid-phase spectrum separation and purification and freeze-drying and refining on the crude product toobtain sincalide.

The invention provides a comprehensive utilization method for waste water containing high-concentration sodium sulfate based on the wet metallurgy process. The comprehensive utilization method at least comprises the following steps that (1) an appropriate quantity of leaching agent is added into an ore raw material, wherein the leaching agent at least comprises sulfate ions and sulfite ions, thensolid-liquid separation is conducted, and leaching slag and leaching liquid are obtained correspondingly; (2) the leaching liquid is pre-treated, namely still standing for sediment is conducted, the leaching liquid is subjected to organic solvent extraction, and an extraction agent and extraction liquid are obtained; (3) the extraction agent is subjected to saponification to obtain a sediment, theextraction liquid is subjected to electrochemical treatment, after calcium ions and organic matter are removed, cooling for crystallization is conducted, and crystals and clear liquid are obtained; (4) at least part of the clear liquid is dosed to obtain a leaching agent, the leaching agent and the leaching slag in the step (1) are mixed and reacted again, and thus reaction slag and secondary leaching liquid are obtained; and (5) at least part of the secondary leaching liquid is utilized to return to the step (1) to be mixed and reacted with to-be-treated ore. The comprehensive utilization method is low in cost and high in efficiency.

The present invention discloses one process of preparing rhodamin B in low power consumption and environment friendly mode. Inside organic solvent of arene halide, m-hydroxy-N, N-diethyl aniline and phthalic anhydride produce condensation reaction to prepare rhodamin B. The process has the organic solvent recovered and reused, no waste water draining, low reaction temperature and short reaction period.

The invention relates to a method for treating waste liquid from production of 2,6-di-t-butyl-p-cresol. The method comprises the following steps: (1) pretreatment of waste liquid; (2) concentration and neutralization of the waste liquid: preheating the waste liquid to 70 to 80 DEG C, then cooling and separating the waste liquid, delivering the separated waste liquid to a third-effect evaporation chamber and a third-effect heating chamber for heating, then introducing a heated mixture to a second-effect evaporation chamber and a second-effect heating chamber for heating, and then introducing a mixture to a first-effect evaporation chamber and a first-effect heater for heating; and (3) recovery of sodium p-toluenesulfonate: subjecting the mixture obtained in the previous step to filtering and separating, allowing a separated mixture to successively pass through an aggregate vortex chamber and a cyclone separator for separating and dedusting, and then carrying out discharging. According to the invention, heat produced in treatment of the waste liquid can be used as heat energy for production; condensed water can be repeatedly used; treatment cost for the waste liquid is effectively lowered; sodium p-toluenesulfonate can be recycled as a product for reuse; and conventional waste water problems are overcome, and green production is realized.

The invention discloses an extractor hood wind wheel cleaning device. The extractor hood wind wheel cleaning device is characterized by comprising a cleaning tank, an ultrasonic generator, a filter, a water pump, a heater and transducers; cleaning fluid is arranged in the cleaning tank; the filter, the water pump and the heater are connected together in series, and a circular structure is formed by the filter, the water pump, the heater and the cleaning tank; the circular flowing direction is from the cleaning tank, the filter, the water pump and the heater to the cleaning tank; the transducers are arranged at the bottom of the cleaning tank and connected with the ultrasonic generator. The problem that the cleaning effect is poor when extractor hood wind wheels are cleaned manually is solved, the phenomena of deformation and paint peeling off of the wind wheels caused by improper cleaning are also avoided, the dynamic balance of the cleaned wind wheels is effectively ensured, and the overall performance of an extractor hood is ensured. The ultrasonic cleaning technology is utilized, the wind wheels are soaked in the whole fluid, all surfaces, making contact with the fluid, of the wind wheels can be cleaned, and wind wheels which are in a complex shape, provided with many gaps and high in precision can be cleaned.

The present invention relates to a method for depositing tin or tin alloy layers on substrates containing antimony compounds as flameproofing agents or for improving the stampability, wherein the antimony compound is removed from the surface of the substrate material by an acid solution prior to metallization. Particularly preferred, pretreatment solutions containing hydrochloric acids are used for this purpose. The method is particularly suitable for producing joinable tin final layers on printed circuit boards containing antimony compounds, the tin final layers being applied onto copper portions of the conductor pattern which are not covered by the solder stop mask.

The invention discloses a water level sensor as well as a water container and a beverage dispenser comprising the same. The water level sensor comprises one or more metal electrodes, one end of each metal electrode is exposed as a detection end, and the other end of each metal electrode is fixed in an insulating fixing piece and is connected with a signal output circuit in the insulating fixing piece; the signal output circuit is connected with a signal output wiring harness or a radio frequency wireless monitoring circuit. The water level sensor is used for devices with liquid level measurement and control, such as a water container and a beverage dispenser, and is combined with a mapping capacitor and a set change excitation signal such as a square wave, a pulse or an alternating signaland the like generated by computer control; the defects of a magnetic levitation ball dry reed sensor can be overcome, the lowest water level can be detected, water can be completely pumped without remaining water, the problem of waste water of a water dispenser is solved, the problems of rusting and scaling of metal electrodes can be prevented or reduced, and the water dispenser has the advantages of being long in service life, simple in circuit and low in cost.

The invention belongs to the field of chemical pharmacy, and particularly discloses a synthesis method of a bifendate intermediate, and the method comprises the following steps: by using gallic acid as a raw material, carrying out esterification reaction with solid phosgene to protect o-diphenolic hydroxyl, carrying out dimethylation and deprotection, and carrying out bromination and methylenationto obtain the bifendate intermediate. According to the synthetic method of the bifendate intermediate, the phosgene is adopted to protect the o-diphenolic hydroxyl, protection is complete, reaction conditions are mild, the process is simple, and operation is convenient. By exploring and optimizing conditions, the product yield and purity are high, the wastewater problem in a borax protection method is solved, the environment is not damaged, the later industrial wastewater treatment is reduced, the production cost of the whole process is reduced to the maximum extent, and the method has extremely high application value.